Add dependencies

305 files changed, 40115 insertions, 0 deletions

diff --git a/vendor/github.com/miekg/dns/.codecov.yml b/vendor/github.com/miekg/dns/.codecov.yml
new file mode 100644
index 0000000..f91e5c1
--- /dev/null
+++ b/vendor/github.com/miekg/dns/.codecov.yml
@@ -0,0 +1,8 @@
+coverage:
+  status:
+    project:
+      default:
+        target: 40%
+        threshold: null
+    patch: false
+    changes: false
diff --git a/vendor/github.com/miekg/dns/.gitignore b/vendor/github.com/miekg/dns/.gitignore
new file mode 100644
index 0000000..776cd95
--- /dev/null
+++ b/vendor/github.com/miekg/dns/.gitignore
@@ -0,0 +1,4 @@
+*.6
+tags
+test.out
+a.out
diff --git a/vendor/github.com/miekg/dns/.travis.yml b/vendor/github.com/miekg/dns/.travis.yml
new file mode 100644
index 0000000..542dd68
--- /dev/null
+++ b/vendor/github.com/miekg/dns/.travis.yml
@@ -0,0 +1,20 @@
+language: go
+sudo: false
+go:
+  - 1.9.x
+  - tip
+
+env:
+  - TESTS="-race -v -bench=. -coverprofile=coverage.txt -covermode=atomic"
+  - TESTS="-race -v ./..."
+
+before_install:
+  # don't use the miekg/dns when testing forks
+  - mkdir -p $GOPATH/src/github.com/miekg
+  - ln -s $TRAVIS_BUILD_DIR $GOPATH/src/github.com/miekg/ || true
+
+script:
+  - go test $TESTS
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
diff --git a/vendor/github.com/miekg/dns/AUTHORS b/vendor/github.com/miekg/dns/AUTHORS
new file mode 100644
index 0000000..1965683
--- /dev/null
+++ b/vendor/github.com/miekg/dns/AUTHORS
@@ -0,0 +1 @@
+Miek Gieben <miek@miek.nl>
diff --git a/vendor/github.com/miekg/dns/CONTRIBUTORS b/vendor/github.com/miekg/dns/CONTRIBUTORS
new file mode 100644
index 0000000..5903779
--- /dev/null
+++ b/vendor/github.com/miekg/dns/CONTRIBUTORS
@@ -0,0 +1,10 @@
+Alex A. Skinner
+Andrew Tunnell-Jones
+Ask Bjørn Hansen
+Dave Cheney
+Dusty Wilson
+Marek Majkowski
+Peter van Dijk
+Omri Bahumi
+Alex Sergeyev
+James Hartig
diff --git a/vendor/github.com/miekg/dns/COPYRIGHT b/vendor/github.com/miekg/dns/COPYRIGHT
new file mode 100644
index 0000000..35702b1
--- /dev/null
+++ b/vendor/github.com/miekg/dns/COPYRIGHT
@@ -0,0 +1,9 @@
+Copyright 2009 The Go Authors. All rights reserved. Use of this source code
+is governed by a BSD-style license that can be found in the LICENSE file.
+Extensions of the original work are copyright (c) 2011 Miek Gieben
+
+Copyright 2011 Miek Gieben. All rights reserved. Use of this source code is
+governed by a BSD-style license that can be found in the LICENSE file.
+
+Copyright 2014 CloudFlare. All rights reserved. Use of this source code is
+governed by a BSD-style license that can be found in the LICENSE file.
diff --git a/vendor/github.com/miekg/dns/Gopkg.lock b/vendor/github.com/miekg/dns/Gopkg.lock
new file mode 100644
index 0000000..0c73a64
--- /dev/null
+++ b/vendor/github.com/miekg/dns/Gopkg.lock
@@ -0,0 +1,21 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/crypto"
+  packages = ["ed25519","ed25519/internal/edwards25519"]
+  revision = "b080dc9a8c480b08e698fb1219160d598526310f"
+
+[[projects]]
+  branch = "master"
+  name = "golang.org/x/net"
+  packages = ["bpf","internal/iana","internal/socket","ipv4","ipv6"]
+  revision = "894f8ed5849b15b810ae41e9590a0d05395bba27"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "c4abc38abaeeeeb9be92455c9c02cae32841122b8982aaa067ef25bb8e86ff9d"
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/vendor/github.com/miekg/dns/Gopkg.toml b/vendor/github.com/miekg/dns/Gopkg.toml
new file mode 100644
index 0000000..2f655b2
--- /dev/null
+++ b/vendor/github.com/miekg/dns/Gopkg.toml
@@ -0,0 +1,26 @@
+
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/crypto"
diff --git a/vendor/github.com/miekg/dns/LICENSE b/vendor/github.com/miekg/dns/LICENSE
new file mode 100644
index 0000000..5763fa7
--- /dev/null
+++ b/vendor/github.com/miekg/dns/LICENSE
@@ -0,0 +1,32 @@
+Extensions of the original work are copyright (c) 2011 Miek Gieben
+
+As this is fork of the official Go code the same license applies:
+
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
diff --git a/vendor/github.com/miekg/dns/Makefile.fuzz b/vendor/github.com/miekg/dns/Makefile.fuzz
new file mode 100644
index 0000000..dc158c4
--- /dev/null
+++ b/vendor/github.com/miekg/dns/Makefile.fuzz
@@ -0,0 +1,33 @@
+# Makefile for fuzzing
+#
+# Use go-fuzz and needs the tools installed.
+# See https://blog.cloudflare.com/dns-parser-meet-go-fuzzer/
+#
+# Installing go-fuzz:
+# $ make -f Makefile.fuzz get
+# Installs:
+# * github.com/dvyukov/go-fuzz/go-fuzz
+# * get github.com/dvyukov/go-fuzz/go-fuzz-build
+
+all: build
+
+.PHONY: build
+build:
+	go-fuzz-build -tags fuzz github.com/miekg/dns
+
+.PHONY: build-newrr
+build-newrr:
+	go-fuzz-build -func FuzzNewRR -tags fuzz github.com/miekg/dns
+
+.PHONY: fuzz
+fuzz:
+	go-fuzz -bin=dns-fuzz.zip -workdir=fuzz
+
+.PHONY: get
+get:
+	go get github.com/dvyukov/go-fuzz/go-fuzz
+	go get github.com/dvyukov/go-fuzz/go-fuzz-build
+
+.PHONY: clean
+clean:
+	rm *-fuzz.zip
diff --git a/vendor/github.com/miekg/dns/Makefile.release b/vendor/github.com/miekg/dns/Makefile.release
new file mode 100644
index 0000000..8fb748e
--- /dev/null
+++ b/vendor/github.com/miekg/dns/Makefile.release
@@ -0,0 +1,52 @@
+# Makefile for releasing.
+#
+# The release is controlled from version.go. The version found there is
+# used to tag the git repo, we're not building any artifects so there is nothing
+# to upload to github.
+#
+# * Up the version in version.go
+# * Run: make -f Makefile.release release
+#   * will *commit* your change with 'Release $VERSION'
+#   * push to github
+#
+
+define GO
+//+build ignore
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/miekg/dns"
+)
+
+func main() {
+	fmt.Println(dns.Version.String())
+}
+endef
+
+$(file > version_release.go,$(GO))
+VERSION:=$(shell go run version_release.go)
+TAG="v$(VERSION)"
+
+all:
+	@echo Use the \'release\' target to start a release $(VERSION)
+	rm -f version_release.go
+
+.PHONY: release
+release: commit push
+	@echo Released $(VERSION)
+	rm -f version_release.go
+
+.PHONY: commit
+commit:
+	@echo Committing release $(VERSION)
+	git commit -am"Release $(VERSION)"
+	git tag $(TAG)
+
+.PHONY: push
+push:
+	@echo Pushing release $(VERSION) to master
+	git push --tags
+	git push
diff --git a/vendor/github.com/miekg/dns/README.md b/vendor/github.com/miekg/dns/README.md
new file mode 100644
index 0000000..1ad23c7
--- /dev/null
+++ b/vendor/github.com/miekg/dns/README.md
@@ -0,0 +1,168 @@
+[![Build Status](https://travis-ci.org/miekg/dns.svg?branch=master)](https://travis-ci.org/miekg/dns)
+[![Code Coverage](https://img.shields.io/codecov/c/github/miekg/dns/master.svg)](https://codecov.io/github/miekg/dns?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/miekg/dns)](https://goreportcard.com/report/miekg/dns)
+[![](https://godoc.org/github.com/miekg/dns?status.svg)](https://godoc.org/github.com/miekg/dns)
+
+# Alternative (more granular) approach to a DNS library
+
+> Less is more.
+
+Complete and usable DNS library. All widely used Resource Records are supported, including the
+DNSSEC types. It follows a lean and mean philosophy. If there is stuff you should know as a DNS
+programmer there isn't a convenience function for it. Server side and client side programming is
+supported, i.e. you can build servers and resolvers with it.
+
+We try to keep the "master" branch as sane as possible and at the bleeding edge of standards,
+avoiding breaking changes wherever reasonable. We support the last two versions of Go.
+
+# Goals
+
+* KISS;
+* Fast;
+* Small API. If it's easy to code in Go, don't make a function for it.
+
+# Users
+
+A not-so-up-to-date-list-that-may-be-actually-current:
+
+* https://github.com/coredns/coredns
+* https://cloudflare.com
+* https://github.com/abh/geodns
+* http://www.statdns.com/
+* http://www.dnsinspect.com/
+* https://github.com/chuangbo/jianbing-dictionary-dns
+* http://www.dns-lg.com/
+* https://github.com/fcambus/rrda
+* https://github.com/kenshinx/godns
+* https://github.com/skynetservices/skydns
+* https://github.com/hashicorp/consul
+* https://github.com/DevelopersPL/godnsagent
+* https://github.com/duedil-ltd/discodns
+* https://github.com/StalkR/dns-reverse-proxy
+* https://github.com/tianon/rawdns
+* https://mesosphere.github.io/mesos-dns/
+* https://pulse.turbobytes.com/
+* https://play.google.com/store/apps/details?id=com.turbobytes.dig
+* https://github.com/fcambus/statzone
+* https://github.com/benschw/dns-clb-go
+* https://github.com/corny/dnscheck for http://public-dns.info/
+* https://namesmith.io
+* https://github.com/miekg/unbound
+* https://github.com/miekg/exdns
+* https://dnslookup.org
+* https://github.com/looterz/grimd
+* https://github.com/phamhongviet/serf-dns
+* https://github.com/mehrdadrad/mylg
+* https://github.com/bamarni/dockness
+* https://github.com/fffaraz/microdns
+* http://kelda.io
+* https://github.com/ipdcode/hades (JD.COM)
+* https://github.com/StackExchange/dnscontrol/
+* https://www.dnsperf.com/
+* https://dnssectest.net/
+* https://dns.apebits.com
+* https://github.com/oif/apex
+* https://github.com/jedisct1/dnscrypt-proxy
+* https://github.com/jedisct1/rpdns
+
+Send pull request if you want to be listed here.
+
+# Features
+
+* UDP/TCP queries, IPv4 and IPv6;
+* RFC 1035 zone file parsing ($INCLUDE, $ORIGIN, $TTL and $GENERATE (for all record types) are supported;
+* Fast:
+    * Reply speed around ~ 80K qps (faster hardware results in more qps);
+    * Parsing RRs ~ 100K RR/s, that's 5M records in about 50 seconds;
+* Server side programming (mimicking the net/http package);
+* Client side programming;
+* DNSSEC: signing, validating and key generation for DSA, RSA, ECDSA and Ed25519;
+* EDNS0, NSID, Cookies;
+* AXFR/IXFR;
+* TSIG, SIG(0);
+* DNS over TLS: optional encrypted connection between client and server;
+* DNS name compression;
+* Depends only on the standard library.
+
+Have fun!
+
+Miek Gieben  -  2010-2012  -  <miek@miek.nl>
+
+# Building
+
+Building is done with the `go` tool. If you have setup your GOPATH correctly, the following should
+work:
+
+    go get github.com/miekg/dns
+    go build github.com/miekg/dns
+
+## Examples
+
+A short "how to use the API" is at the beginning of doc.go (this also will show
+when you call `godoc github.com/miekg/dns`).
+
+Example programs can be found in the `github.com/miekg/exdns` repository.
+
+## Supported RFCs
+
+*all of them*
+
+* 103{4,5} - DNS standard
+* 1348 - NSAP record (removed the record)
+* 1982 - Serial Arithmetic
+* 1876 - LOC record
+* 1995 - IXFR
+* 1996 - DNS notify
+* 2136 - DNS Update (dynamic updates)
+* 2181 - RRset definition - there is no RRset type though, just []RR
+* 2537 - RSAMD5 DNS keys
+* 2065 - DNSSEC (updated in later RFCs)
+* 2671 - EDNS record
+* 2782 - SRV record
+* 2845 - TSIG record
+* 2915 - NAPTR record
+* 2929 - DNS IANA Considerations
+* 3110 - RSASHA1 DNS keys
+* 3225 - DO bit (DNSSEC OK)
+* 340{1,2,3} - NAPTR record
+* 3445 - Limiting the scope of (DNS)KEY
+* 3597 - Unknown RRs
+* 403{3,4,5} - DNSSEC + validation functions
+* 4255 - SSHFP record
+* 4343 - Case insensitivity
+* 4408 - SPF record
+* 4509 - SHA256 Hash in DS
+* 4592 - Wildcards in the DNS
+* 4635 - HMAC SHA TSIG
+* 4701 - DHCID
+* 4892 - id.server
+* 5001 - NSID
+* 5155 - NSEC3 record
+* 5205 - HIP record
+* 5702 - SHA2 in the DNS
+* 5936 - AXFR
+* 5966 - TCP implementation recommendations
+* 6605 - ECDSA
+* 6725 - IANA Registry Update
+* 6742 - ILNP DNS
+* 6840 - Clarifications and Implementation Notes for DNS Security
+* 6844 - CAA record
+* 6891 - EDNS0 update
+* 6895 - DNS IANA considerations
+* 6975 - Algorithm Understanding in DNSSEC
+* 7043 - EUI48/EUI64 records
+* 7314 - DNS (EDNS) EXPIRE Option
+* 7477 - CSYNC RR
+* 7828 - edns-tcp-keepalive EDNS0 Option
+* 7553 - URI record
+* 7858 - DNS over TLS: Initiation and Performance Considerations
+* 7871 - EDNS0 Client Subnet
+* 7873 - Domain Name System (DNS) Cookies (draft-ietf-dnsop-cookies)
+* 8080 - EdDSA for DNSSEC
+
+## Loosely based upon
+
+* `ldns`
+* `NSD`
+* `Net::DNS`
+* `GRONG`
diff --git a/vendor/github.com/miekg/dns/client.go b/vendor/github.com/miekg/dns/client.go
new file mode 100644
index 0000000..856b169
--- /dev/null
+++ b/vendor/github.com/miekg/dns/client.go
@@ -0,0 +1,506 @@
+package dns
+
+// A client implementation.
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"encoding/binary"
+	"io"
+	"net"
+	"strings"
+	"time"
+)
+
+const dnsTimeout time.Duration = 2 * time.Second
+const tcpIdleTimeout time.Duration = 8 * time.Second
+
+// A Conn represents a connection to a DNS server.
+type Conn struct {
+	net.Conn                         // a net.Conn holding the connection
+	UDPSize        uint16            // minimum receive buffer for UDP messages
+	TsigSecret     map[string]string // secret(s) for Tsig map[<zonename>]<base64 secret>, zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2)
+	rtt            time.Duration
+	t              time.Time
+	tsigRequestMAC string
+}
+
+// A Client defines parameters for a DNS client.
+type Client struct {
+	Net       string      // if "tcp" or "tcp-tls" (DNS over TLS) a TCP query will be initiated, otherwise an UDP one (default is "" for UDP)
+	UDPSize   uint16      // minimum receive buffer for UDP messages
+	TLSConfig *tls.Config // TLS connection configuration
+	Dialer    *net.Dialer // a net.Dialer used to set local address, timeouts and more
+	// Timeout is a cumulative timeout for dial, write and read, defaults to 0 (disabled) - overrides DialTimeout, ReadTimeout,
+	// WriteTimeout when non-zero. Can be overridden with net.Dialer.Timeout (see Client.ExchangeWithDialer and
+	// Client.Dialer) or context.Context.Deadline (see the deprecated ExchangeContext)
+	Timeout        time.Duration
+	DialTimeout    time.Duration     // net.DialTimeout, defaults to 2 seconds, or net.Dialer.Timeout if expiring earlier - overridden by Timeout when that value is non-zero
+	ReadTimeout    time.Duration     // net.Conn.SetReadTimeout value for connections, defaults to 2 seconds - overridden by Timeout when that value is non-zero
+	WriteTimeout   time.Duration     // net.Conn.SetWriteTimeout value for connections, defaults to 2 seconds - overridden by Timeout when that value is non-zero
+	TsigSecret     map[string]string // secret(s) for Tsig map[<zonename>]<base64 secret>, zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2)
+	SingleInflight bool              // if true suppress multiple outstanding queries for the same Qname, Qtype and Qclass
+	group          singleflight
+}
+
+// Exchange performs a synchronous UDP query. It sends the message m to the address
+// contained in a and waits for a reply. Exchange does not retry a failed query, nor
+// will it fall back to TCP in case of truncation.
+// See client.Exchange for more information on setting larger buffer sizes.
+func Exchange(m *Msg, a string) (r *Msg, err error) {
+	client := Client{Net: "udp"}
+	r, _, err = client.Exchange(m, a)
+	return r, err
+}
+
+func (c *Client) dialTimeout() time.Duration {
+	if c.Timeout != 0 {
+		return c.Timeout
+	}
+	if c.DialTimeout != 0 {
+		return c.DialTimeout
+	}
+	return dnsTimeout
+}
+
+func (c *Client) readTimeout() time.Duration {
+	if c.ReadTimeout != 0 {
+		return c.ReadTimeout
+	}
+	return dnsTimeout
+}
+
+func (c *Client) writeTimeout() time.Duration {
+	if c.WriteTimeout != 0 {
+		return c.WriteTimeout
+	}
+	return dnsTimeout
+}
+
+// Dial connects to the address on the named network.
+func (c *Client) Dial(address string) (conn *Conn, err error) {
+	// create a new dialer with the appropriate timeout
+	var d net.Dialer
+	if c.Dialer == nil {
+		d = net.Dialer{}
+	} else {
+		d = net.Dialer(*c.Dialer)
+	}
+	d.Timeout = c.getTimeoutForRequest(c.writeTimeout())
+
+	network := "udp"
+	useTLS := false
+
+	switch c.Net {
+	case "tcp-tls":
+		network = "tcp"
+		useTLS = true
+	case "tcp4-tls":
+		network = "tcp4"
+		useTLS = true
+	case "tcp6-tls":
+		network = "tcp6"
+		useTLS = true
+	default:
+		if c.Net != "" {
+			network = c.Net
+		}
+	}
+
+	conn = new(Conn)
+	if useTLS {
+		conn.Conn, err = tls.DialWithDialer(&d, network, address, c.TLSConfig)
+	} else {
+		conn.Conn, err = d.Dial(network, address)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+// Exchange performs a synchronous query. It sends the message m to the address
+// contained in a and waits for a reply. Basic use pattern with a *dns.Client:
+//
+//	c := new(dns.Client)
+//	in, rtt, err := c.Exchange(message, "127.0.0.1:53")
+//
+// Exchange does not retry a failed query, nor will it fall back to TCP in
+// case of truncation.
+// It is up to the caller to create a message that allows for larger responses to be
+// returned. Specifically this means adding an EDNS0 OPT RR that will advertise a larger
+// buffer, see SetEdns0. Messages without an OPT RR will fallback to the historic limit
+// of 512 bytes
+// To specify a local address or a timeout, the caller has to set the `Client.Dialer`
+// attribute appropriately
+func (c *Client) Exchange(m *Msg, address string) (r *Msg, rtt time.Duration, err error) {
+	if !c.SingleInflight {
+		return c.exchange(m, address)
+	}
+
+	t := "nop"
+	if t1, ok := TypeToString[m.Question[0].Qtype]; ok {
+		t = t1
+	}
+	cl := "nop"
+	if cl1, ok := ClassToString[m.Question[0].Qclass]; ok {
+		cl = cl1
+	}
+	r, rtt, err, shared := c.group.Do(m.Question[0].Name+t+cl, func() (*Msg, time.Duration, error) {
+		return c.exchange(m, address)
+	})
+	if r != nil && shared {
+		r = r.Copy()
+	}
+	return r, rtt, err
+}
+
+func (c *Client) exchange(m *Msg, a string) (r *Msg, rtt time.Duration, err error) {
+	var co *Conn
+
+	co, err = c.Dial(a)
+
+	if err != nil {
+		return nil, 0, err
+	}
+	defer co.Close()
+
+	opt := m.IsEdns0()
+	// If EDNS0 is used use that for size.
+	if opt != nil && opt.UDPSize() >= MinMsgSize {
+		co.UDPSize = opt.UDPSize()
+	}
+	// Otherwise use the client's configured UDP size.
+	if opt == nil && c.UDPSize >= MinMsgSize {
+		co.UDPSize = c.UDPSize
+	}
+
+	co.TsigSecret = c.TsigSecret
+	// write with the appropriate write timeout
+	co.SetWriteDeadline(time.Now().Add(c.getTimeoutForRequest(c.writeTimeout())))
+	if err = co.WriteMsg(m); err != nil {
+		return nil, 0, err
+	}
+
+	co.SetReadDeadline(time.Now().Add(c.getTimeoutForRequest(c.readTimeout())))
+	r, err = co.ReadMsg()
+	if err == nil && r.Id != m.Id {
+		err = ErrId
+	}
+	return r, co.rtt, err
+}
+
+// ReadMsg reads a message from the connection co.
+// If the received message contains a TSIG record the transaction signature
+// is verified. This method always tries to return the message, however if an
+// error is returned there are no guarantees that the returned message is a
+// valid representation of the packet read.
+func (co *Conn) ReadMsg() (*Msg, error) {
+	p, err := co.ReadMsgHeader(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	m := new(Msg)
+	if err := m.Unpack(p); err != nil {
+		// If an error was returned, we still want to allow the user to use
+		// the message, but naively they can just check err if they don't want
+		// to use an erroneous message
+		return m, err
+	}
+	if t := m.IsTsig(); t != nil {
+		if _, ok := co.TsigSecret[t.Hdr.Name]; !ok {
+			return m, ErrSecret
+		}
+		// Need to work on the original message p, as that was used to calculate the tsig.
+		err = TsigVerify(p, co.TsigSecret[t.Hdr.Name], co.tsigRequestMAC, false)
+	}
+	return m, err
+}
+
+// ReadMsgHeader reads a DNS message, parses and populates hdr (when hdr is not nil).
+// Returns message as a byte slice to be parsed with Msg.Unpack later on.
+// Note that error handling on the message body is not possible as only the header is parsed.
+func (co *Conn) ReadMsgHeader(hdr *Header) ([]byte, error) {
+	var (
+		p   []byte
+		n   int
+		err error
+	)
+
+	switch t := co.Conn.(type) {
+	case *net.TCPConn, *tls.Conn:
+		r := t.(io.Reader)
+
+		// First two bytes specify the length of the entire message.
+		l, err := tcpMsgLen(r)
+		if err != nil {
+			return nil, err
+		}
+		p = make([]byte, l)
+		n, err = tcpRead(r, p)
+		co.rtt = time.Since(co.t)
+	default:
+		if co.UDPSize > MinMsgSize {
+			p = make([]byte, co.UDPSize)
+		} else {
+			p = make([]byte, MinMsgSize)
+		}
+		n, err = co.Read(p)
+		co.rtt = time.Since(co.t)
+	}
+
+	if err != nil {
+		return nil, err
+	} else if n < headerSize {
+		return nil, ErrShortRead
+	}
+
+	p = p[:n]
+	if hdr != nil {
+		dh, _, err := unpackMsgHdr(p, 0)
+		if err != nil {
+			return nil, err
+		}
+		*hdr = dh
+	}
+	return p, err
+}
+
+// tcpMsgLen is a helper func to read first two bytes of stream as uint16 packet length.
+func tcpMsgLen(t io.Reader) (int, error) {
+	p := []byte{0, 0}
+	n, err := t.Read(p)
+	if err != nil {
+		return 0, err
+	}
+
+	// As seen with my local router/switch, returns 1 byte on the above read,
+	// resulting a a ShortRead. Just write it out (instead of loop) and read the
+	// other byte.
+	if n == 1 {
+		n1, err := t.Read(p[1:])
+		if err != nil {
+			return 0, err
+		}
+		n += n1
+	}
+
+	if n != 2 {
+		return 0, ErrShortRead
+	}
+	l := binary.BigEndian.Uint16(p)
+	if l == 0 {
+		return 0, ErrShortRead
+	}
+	return int(l), nil
+}
+
+// tcpRead calls TCPConn.Read enough times to fill allocated buffer.
+func tcpRead(t io.Reader, p []byte) (int, error) {
+	n, err := t.Read(p)
+	if err != nil {
+		return n, err
+	}
+	for n < len(p) {
+		j, err := t.Read(p[n:])
+		if err != nil {
+			return n, err
+		}
+		n += j
+	}
+	return n, err
+}
+
+// Read implements the net.Conn read method.
+func (co *Conn) Read(p []byte) (n int, err error) {
+	if co.Conn == nil {
+		return 0, ErrConnEmpty
+	}
+	if len(p) < 2 {
+		return 0, io.ErrShortBuffer
+	}
+	switch t := co.Conn.(type) {
+	case *net.TCPConn, *tls.Conn:
+		r := t.(io.Reader)
+
+		l, err := tcpMsgLen(r)
+		if err != nil {
+			return 0, err
+		}
+		if l > len(p) {
+			return int(l), io.ErrShortBuffer
+		}
+		return tcpRead(r, p[:l])
+	}
+	// UDP connection
+	n, err = co.Conn.Read(p)
+	if err != nil {
+		return n, err
+	}
+	return n, err
+}
+
+// WriteMsg sends a message through the connection co.
+// If the message m contains a TSIG record the transaction
+// signature is calculated.
+func (co *Conn) WriteMsg(m *Msg) (err error) {
+	var out []byte
+	if t := m.IsTsig(); t != nil {
+		mac := ""
+		if _, ok := co.TsigSecret[t.Hdr.Name]; !ok {
+			return ErrSecret
+		}
+		out, mac, err = TsigGenerate(m, co.TsigSecret[t.Hdr.Name], co.tsigRequestMAC, false)
+		// Set for the next read, although only used in zone transfers
+		co.tsigRequestMAC = mac
+	} else {
+		out, err = m.Pack()
+	}
+	if err != nil {
+		return err
+	}
+	co.t = time.Now()
+	if _, err = co.Write(out); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Write implements the net.Conn Write method.
+func (co *Conn) Write(p []byte) (n int, err error) {
+	switch t := co.Conn.(type) {
+	case *net.TCPConn, *tls.Conn:
+		w := t.(io.Writer)
+
+		lp := len(p)
+		if lp < 2 {
+			return 0, io.ErrShortBuffer
+		}
+		if lp > MaxMsgSize {
+			return 0, &Error{err: "message too large"}
+		}
+		l := make([]byte, 2, lp+2)
+		binary.BigEndian.PutUint16(l, uint16(lp))
+		p = append(l, p...)
+		n, err := io.Copy(w, bytes.NewReader(p))
+		return int(n), err
+	}
+	n, err = co.Conn.Write(p)
+	return n, err
+}
+
+// Return the appropriate timeout for a specific request
+func (c *Client) getTimeoutForRequest(timeout time.Duration) time.Duration {
+	var requestTimeout time.Duration
+	if c.Timeout != 0 {
+		requestTimeout = c.Timeout
+	} else {
+		requestTimeout = timeout
+	}
+	// net.Dialer.Timeout has priority if smaller than the timeouts computed so
+	// far
+	if c.Dialer != nil && c.Dialer.Timeout != 0 {
+		if c.Dialer.Timeout < requestTimeout {
+			requestTimeout = c.Dialer.Timeout
+		}
+	}
+	return requestTimeout
+}
+
+// Dial connects to the address on the named network.
+func Dial(network, address string) (conn *Conn, err error) {
+	conn = new(Conn)
+	conn.Conn, err = net.Dial(network, address)
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+// ExchangeContext performs a synchronous UDP query, like Exchange. It
+// additionally obeys deadlines from the passed Context.
+func ExchangeContext(ctx context.Context, m *Msg, a string) (r *Msg, err error) {
+	client := Client{Net: "udp"}
+	r, _, err = client.ExchangeContext(ctx, m, a)
+	// ignorint rtt to leave the original ExchangeContext API unchanged, but
+	// this function will go away
+	return r, err
+}
+
+// ExchangeConn performs a synchronous query. It sends the message m via the connection
+// c and waits for a reply. The connection c is not closed by ExchangeConn.
+// This function is going away, but can easily be mimicked:
+//
+//	co := &dns.Conn{Conn: c} // c is your net.Conn
+//	co.WriteMsg(m)
+//	in, _  := co.ReadMsg()
+//	co.Close()
+//
+func ExchangeConn(c net.Conn, m *Msg) (r *Msg, err error) {
+	println("dns: ExchangeConn: this function is deprecated")
+	co := new(Conn)
+	co.Conn = c
+	if err = co.WriteMsg(m); err != nil {
+		return nil, err
+	}
+	r, err = co.ReadMsg()
+	if err == nil && r.Id != m.Id {
+		err = ErrId
+	}
+	return r, err
+}
+
+// DialTimeout acts like Dial but takes a timeout.
+func DialTimeout(network, address string, timeout time.Duration) (conn *Conn, err error) {
+	client := Client{Net: network, Dialer: &net.Dialer{Timeout: timeout}}
+	conn, err = client.Dial(address)
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+// DialWithTLS connects to the address on the named network with TLS.
+func DialWithTLS(network, address string, tlsConfig *tls.Config) (conn *Conn, err error) {
+	if !strings.HasSuffix(network, "-tls") {
+		network += "-tls"
+	}
+	client := Client{Net: network, TLSConfig: tlsConfig}
+	conn, err = client.Dial(address)
+
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+// DialTimeoutWithTLS acts like DialWithTLS but takes a timeout.
+func DialTimeoutWithTLS(network, address string, tlsConfig *tls.Config, timeout time.Duration) (conn *Conn, err error) {
+	if !strings.HasSuffix(network, "-tls") {
+		network += "-tls"
+	}
+	client := Client{Net: network, Dialer: &net.Dialer{Timeout: timeout}, TLSConfig: tlsConfig}
+	conn, err = client.Dial(address)
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
+}
+
+// ExchangeContext acts like Exchange, but honors the deadline on the provided
+// context, if present. If there is both a context deadline and a configured
+// timeout on the client, the earliest of the two takes effect.
+func (c *Client) ExchangeContext(ctx context.Context, m *Msg, a string) (r *Msg, rtt time.Duration, err error) {
+	var timeout time.Duration
+	if deadline, ok := ctx.Deadline(); !ok {
+		timeout = 0
+	} else {
+		timeout = deadline.Sub(time.Now())
+	}
+	// not passing the context to the underlying calls, as the API does not support
+	// context. For timeouts you should set up Client.Dialer and call Client.Exchange.
+	c.Dialer = &net.Dialer{Timeout: timeout}
+	return c.Exchange(m, a)
+}
diff --git a/vendor/github.com/miekg/dns/clientconfig.go b/vendor/github.com/miekg/dns/clientconfig.go
new file mode 100644
index 0000000..a606ef6
--- /dev/null
+++ b/vendor/github.com/miekg/dns/clientconfig.go
@@ -0,0 +1,139 @@
+package dns
+
+import (
+	"bufio"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// ClientConfig wraps the contents of the /etc/resolv.conf file.
+type ClientConfig struct {
+	Servers  []string // servers to use
+	Search   []string // suffixes to append to local name
+	Port     string   // what port to use
+	Ndots    int      // number of dots in name to trigger absolute lookup
+	Timeout  int      // seconds before giving up on packet
+	Attempts int      // lost packets before giving up on server, not used in the package dns
+}
+
+// ClientConfigFromFile parses a resolv.conf(5) like file and returns
+// a *ClientConfig.
+func ClientConfigFromFile(resolvconf string) (*ClientConfig, error) {
+	file, err := os.Open(resolvconf)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return ClientConfigFromReader(file)
+}
+
+// ClientConfigFromReader works like ClientConfigFromFile but takes an io.Reader as argument
+func ClientConfigFromReader(resolvconf io.Reader) (*ClientConfig, error) {
+	c := new(ClientConfig)
+	scanner := bufio.NewScanner(resolvconf)
+	c.Servers = make([]string, 0)
+	c.Search = make([]string, 0)
+	c.Port = "53"
+	c.Ndots = 1
+	c.Timeout = 5
+	c.Attempts = 2
+
+	for scanner.Scan() {
+		if err := scanner.Err(); err != nil {
+			return nil, err
+		}
+		line := scanner.Text()
+		f := strings.Fields(line)
+		if len(f) < 1 {
+			continue
+		}
+		switch f[0] {
+		case "nameserver": // add one name server
+			if len(f) > 1 {
+				// One more check: make sure server name is
+				// just an IP address.  Otherwise we need DNS
+				// to look it up.
+				name := f[1]
+				c.Servers = append(c.Servers, name)
+			}
+
+		case "domain": // set search path to just this domain
+			if len(f) > 1 {
+				c.Search = make([]string, 1)
+				c.Search[0] = f[1]
+			} else {
+				c.Search = make([]string, 0)
+			}
+
+		case "search": // set search path to given servers
+			c.Search = make([]string, len(f)-1)
+			for i := 0; i < len(c.Search); i++ {
+				c.Search[i] = f[i+1]
+			}
+
+		case "options": // magic options
+			for i := 1; i < len(f); i++ {
+				s := f[i]
+				switch {
+				case len(s) >= 6 && s[:6] == "ndots:":
+					n, _ := strconv.Atoi(s[6:])
+					if n < 0 {
+						n = 0
+					} else if n > 15 {
+						n = 15
+					}
+					c.Ndots = n
+				case len(s) >= 8 && s[:8] == "timeout:":
+					n, _ := strconv.Atoi(s[8:])
+					if n < 1 {
+						n = 1
+					}
+					c.Timeout = n
+				case len(s) >= 8 && s[:9] == "attempts:":
+					n, _ := strconv.Atoi(s[9:])
+					if n < 1 {
+						n = 1
+					}
+					c.Attempts = n
+				case s == "rotate":
+					/* not imp */
+				}
+			}
+		}
+	}
+	return c, nil
+}
+
+// NameList returns all of the names that should be queried based on the
+// config. It is based off of go's net/dns name building, but it does not
+// check the length of the resulting names.
+func (c *ClientConfig) NameList(name string) []string {
+	// if this domain is already fully qualified, no append needed.
+	if IsFqdn(name) {
+		return []string{name}
+	}
+
+	// Check to see if the name has more labels than Ndots. Do this before making
+	// the domain fully qualified.
+	hasNdots := CountLabel(name) > c.Ndots
+	// Make the domain fully qualified.
+	name = Fqdn(name)
+
+	// Make a list of names based off search.
+	names := []string{}
+
+	// If name has enough dots, try that first.
+	if hasNdots {
+		names = append(names, name)
+	}
+	for _, s := range c.Search {
+		names = append(names, Fqdn(name+s))
+	}
+	// If we didn't have enough dots, try after suffixes.
+	if !hasNdots {
+		names = append(names, name)
+	}
+	return names
+}
diff --git a/vendor/github.com/miekg/dns/compress_generate.go b/vendor/github.com/miekg/dns/compress_generate.go
new file mode 100644
index 0000000..87fb36f
--- /dev/null
+++ b/vendor/github.com/miekg/dns/compress_generate.go
@@ -0,0 +1,188 @@
+//+build ignore
+
+// compression_generate.go is meant to run with go generate. It will use
+// go/{importer,types} to track down all the RR struct types. Then for each type
+// it will look to see if there are (compressible) names, if so it will add that
+// type to compressionLenHelperType and comressionLenSearchType which "fake" the
+// compression so that Len() is fast.
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"go/format"
+	"go/importer"
+	"go/types"
+	"log"
+	"os"
+)
+
+var packageHdr = `
+// Code generated by "go run compress_generate.go"; DO NOT EDIT.
+
+package dns
+
+`
+
+// getTypeStruct will take a type and the package scope, and return the
+// (innermost) struct if the type is considered a RR type (currently defined as
+// those structs beginning with a RR_Header, could be redefined as implementing
+// the RR interface). The bool return value indicates if embedded structs were
+// resolved.
+func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) {
+	st, ok := t.Underlying().(*types.Struct)
+	if !ok {
+		return nil, false
+	}
+	if st.Field(0).Type() == scope.Lookup("RR_Header").Type() {
+		return st, false
+	}
+	if st.Field(0).Anonymous() {
+		st, _ := getTypeStruct(st.Field(0).Type(), scope)
+		return st, true
+	}
+	return nil, false
+}
+
+func main() {
+	// Import and type-check the package
+	pkg, err := importer.Default().Import("github.com/miekg/dns")
+	fatalIfErr(err)
+	scope := pkg.Scope()
+
+	var domainTypes []string  // Types that have a domain name in them (either compressible or not).
+	var cdomainTypes []string // Types that have a compressible domain name in them (subset of domainType)
+Names:
+	for _, name := range scope.Names() {
+		o := scope.Lookup(name)
+		if o == nil || !o.Exported() {
+			continue
+		}
+		st, _ := getTypeStruct(o.Type(), scope)
+		if st == nil {
+			continue
+		}
+		if name == "PrivateRR" {
+			continue
+		}
+
+		if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" {
+			log.Fatalf("Constant Type%s does not exist.", o.Name())
+		}
+
+		for i := 1; i < st.NumFields(); i++ {
+			if _, ok := st.Field(i).Type().(*types.Slice); ok {
+				if st.Tag(i) == `dns:"domain-name"` {
+					domainTypes = append(domainTypes, o.Name())
+					continue Names
+				}
+				if st.Tag(i) == `dns:"cdomain-name"` {
+					cdomainTypes = append(cdomainTypes, o.Name())
+					domainTypes = append(domainTypes, o.Name())
+					continue Names
+				}
+				continue
+			}
+
+			switch {
+			case st.Tag(i) == `dns:"domain-name"`:
+				domainTypes = append(domainTypes, o.Name())
+				continue Names
+			case st.Tag(i) == `dns:"cdomain-name"`:
+				cdomainTypes = append(cdomainTypes, o.Name())
+				domainTypes = append(domainTypes, o.Name())
+				continue Names
+			}
+		}
+	}
+
+	b := &bytes.Buffer{}
+	b.WriteString(packageHdr)
+
+	// compressionLenHelperType - all types that have domain-name/cdomain-name can be used for compressing names
+
+	fmt.Fprint(b, "func compressionLenHelperType(c map[string]int, r RR) {\n")
+	fmt.Fprint(b, "switch x := r.(type) {\n")
+	for _, name := range domainTypes {
+		o := scope.Lookup(name)
+		st, _ := getTypeStruct(o.Type(), scope)
+
+		fmt.Fprintf(b, "case *%s:\n", name)
+		for i := 1; i < st.NumFields(); i++ {
+			out := func(s string) { fmt.Fprintf(b, "compressionLenHelper(c, x.%s)\n", st.Field(i).Name()) }
+
+			if _, ok := st.Field(i).Type().(*types.Slice); ok {
+				switch st.Tag(i) {
+				case `dns:"domain-name"`:
+					fallthrough
+				case `dns:"cdomain-name"`:
+					// For HIP we need to slice over the elements in this slice.
+					fmt.Fprintf(b, `for i := range x.%s {
+						compressionLenHelper(c, x.%s[i])
+					}
+`, st.Field(i).Name(), st.Field(i).Name())
+				}
+				continue
+			}
+
+			switch {
+			case st.Tag(i) == `dns:"cdomain-name"`:
+				fallthrough
+			case st.Tag(i) == `dns:"domain-name"`:
+				out(st.Field(i).Name())
+			}
+		}
+	}
+	fmt.Fprintln(b, "}\n}\n\n")
+
+	// compressionLenSearchType - search cdomain-tags types for compressible names.
+
+	fmt.Fprint(b, "func compressionLenSearchType(c map[string]int, r RR) (int, bool) {\n")
+	fmt.Fprint(b, "switch x := r.(type) {\n")
+	for _, name := range cdomainTypes {
+		o := scope.Lookup(name)
+		st, _ := getTypeStruct(o.Type(), scope)
+
+		fmt.Fprintf(b, "case *%s:\n", name)
+		j := 1
+		for i := 1; i < st.NumFields(); i++ {
+			out := func(s string, j int) {
+				fmt.Fprintf(b, "k%d, ok%d := compressionLenSearch(c, x.%s)\n", j, j, st.Field(i).Name())
+			}
+
+			// There are no slice types with names that can be compressed.
+
+			switch {
+			case st.Tag(i) == `dns:"cdomain-name"`:
+				out(st.Field(i).Name(), j)
+				j++
+			}
+		}
+		k := "k1"
+		ok := "ok1"
+		for i := 2; i < j; i++ {
+			k += fmt.Sprintf(" + k%d", i)
+			ok += fmt.Sprintf(" && ok%d", i)
+		}
+		fmt.Fprintf(b, "return %s, %s\n", k, ok)
+	}
+	fmt.Fprintln(b, "}\nreturn 0, false\n}\n\n")
+
+	// gofmt
+	res, err := format.Source(b.Bytes())
+	if err != nil {
+		b.WriteTo(os.Stderr)
+		log.Fatal(err)
+	}
+
+	f, err := os.Create("zcompress.go")
+	fatalIfErr(err)
+	defer f.Close()
+	f.Write(res)
+}
+
+func fatalIfErr(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/vendor/github.com/miekg/dns/dane.go b/vendor/github.com/miekg/dns/dane.go
new file mode 100644
index 0000000..8c4a14e
--- /dev/null
+++ b/vendor/github.com/miekg/dns/dane.go
@@ -0,0 +1,43 @@
+package dns
+
+import (
+	"crypto/sha256"
+	"crypto/sha512"
+	"crypto/x509"
+	"encoding/hex"
+	"errors"
+)
+
+// CertificateToDANE converts a certificate to a hex string as used in the TLSA or SMIMEA records.
+func CertificateToDANE(selector, matchingType uint8, cert *x509.Certificate) (string, error) {
+	switch matchingType {
+	case 0:
+		switch selector {
+		case 0:
+			return hex.EncodeToString(cert.Raw), nil
+		case 1:
+			return hex.EncodeToString(cert.RawSubjectPublicKeyInfo), nil
+		}
+	case 1:
+		h := sha256.New()
+		switch selector {
+		case 0:
+			h.Write(cert.Raw)
+			return hex.EncodeToString(h.Sum(nil)), nil
+		case 1:
+			h.Write(cert.RawSubjectPublicKeyInfo)
+			return hex.EncodeToString(h.Sum(nil)), nil
+		}
+	case 2:
+		h := sha512.New()
+		switch selector {
+		case 0:
+			h.Write(cert.Raw)
+			return hex.EncodeToString(h.Sum(nil)), nil
+		case 1:
+			h.Write(cert.RawSubjectPublicKeyInfo)
+			return hex.EncodeToString(h.Sum(nil)), nil
+		}
+	}
+	return "", errors.New("dns: bad MatchingType or Selector")
+}
diff --git a/vendor/github.com/miekg/dns/defaults.go b/vendor/github.com/miekg/dns/defaults.go
new file mode 100644
index 0000000..14e18b0
--- /dev/null
+++ b/vendor/github.com/miekg/dns/defaults.go
@@ -0,0 +1,288 @@
+package dns
+
+import (
+	"errors"
+	"net"
+	"strconv"
+)
+
+const hexDigit = "0123456789abcdef"
+
+// Everything is assumed in ClassINET.
+
+// SetReply creates a reply message from a request message.
+func (dns *Msg) SetReply(request *Msg) *Msg {
+	dns.Id = request.Id
+	dns.Response = true
+	dns.Opcode = request.Opcode
+	if dns.Opcode == OpcodeQuery {
+		dns.RecursionDesired = request.RecursionDesired // Copy rd bit
+		dns.CheckingDisabled = request.CheckingDisabled // Copy cd bit
+	}
+	dns.Rcode = RcodeSuccess
+	if len(request.Question) > 0 {
+		dns.Question = make([]Question, 1)
+		dns.Question[0] = request.Question[0]
+	}
+	return dns
+}
+
+// SetQuestion creates a question message, it sets the Question
+// section, generates an Id and sets the RecursionDesired (RD)
+// bit to true.
+func (dns *Msg) SetQuestion(z string, t uint16) *Msg {
+	dns.Id = Id()
+	dns.RecursionDesired = true
+	dns.Question = make([]Question, 1)
+	dns.Question[0] = Question{z, t, ClassINET}
+	return dns
+}
+
+// SetNotify creates a notify message, it sets the Question
+// section, generates an Id and sets the Authoritative (AA)
+// bit to true.
+func (dns *Msg) SetNotify(z string) *Msg {
+	dns.Opcode = OpcodeNotify
+	dns.Authoritative = true
+	dns.Id = Id()
+	dns.Question = make([]Question, 1)
+	dns.Question[0] = Question{z, TypeSOA, ClassINET}
+	return dns
+}
+
+// SetRcode creates an error message suitable for the request.
+func (dns *Msg) SetRcode(request *Msg, rcode int) *Msg {
+	dns.SetReply(request)
+	dns.Rcode = rcode
+	return dns
+}
+
+// SetRcodeFormatError creates a message with FormError set.
+func (dns *Msg) SetRcodeFormatError(request *Msg) *Msg {
+	dns.Rcode = RcodeFormatError
+	dns.Opcode = OpcodeQuery
+	dns.Response = true
+	dns.Authoritative = false
+	dns.Id = request.Id
+	return dns
+}
+
+// SetUpdate makes the message a dynamic update message. It
+// sets the ZONE section to: z, TypeSOA, ClassINET.
+func (dns *Msg) SetUpdate(z string) *Msg {
+	dns.Id = Id()
+	dns.Response = false
+	dns.Opcode = OpcodeUpdate
+	dns.Compress = false // BIND9 cannot handle compression
+	dns.Question = make([]Question, 1)
+	dns.Question[0] = Question{z, TypeSOA, ClassINET}
+	return dns
+}
+
+// SetIxfr creates message for requesting an IXFR.
+func (dns *Msg) SetIxfr(z string, serial uint32, ns, mbox string) *Msg {
+	dns.Id = Id()
+	dns.Question = make([]Question, 1)
+	dns.Ns = make([]RR, 1)
+	s := new(SOA)
+	s.Hdr = RR_Header{z, TypeSOA, ClassINET, defaultTtl, 0}
+	s.Serial = serial
+	s.Ns = ns
+	s.Mbox = mbox
+	dns.Question[0] = Question{z, TypeIXFR, ClassINET}
+	dns.Ns[0] = s
+	return dns
+}
+
+// SetAxfr creates message for requesting an AXFR.
+func (dns *Msg) SetAxfr(z string) *Msg {
+	dns.Id = Id()
+	dns.Question = make([]Question, 1)
+	dns.Question[0] = Question{z, TypeAXFR, ClassINET}
+	return dns
+}
+
+// SetTsig appends a TSIG RR to the message.
+// This is only a skeleton TSIG RR that is added as the last RR in the
+// additional section. The Tsig is calculated when the message is being send.
+func (dns *Msg) SetTsig(z, algo string, fudge uint16, timesigned int64) *Msg {
+	t := new(TSIG)
+	t.Hdr = RR_Header{z, TypeTSIG, ClassANY, 0, 0}
+	t.Algorithm = algo
+	t.Fudge = fudge
+	t.TimeSigned = uint64(timesigned)
+	t.OrigId = dns.Id
+	dns.Extra = append(dns.Extra, t)
+	return dns
+}
+
+// SetEdns0 appends a EDNS0 OPT RR to the message.
+// TSIG should always the last RR in a message.
+func (dns *Msg) SetEdns0(udpsize uint16, do bool) *Msg {
+	e := new(OPT)
+	e.Hdr.Name = "."
+	e.Hdr.Rrtype = TypeOPT
+	e.SetUDPSize(udpsize)
+	if do {
+		e.SetDo()
+	}
+	dns.Extra = append(dns.Extra, e)
+	return dns
+}
+
+// IsTsig checks if the message has a TSIG record as the last record
+// in the additional section. It returns the TSIG record found or nil.
+func (dns *Msg) IsTsig() *TSIG {
+	if len(dns.Extra) > 0 {
+		if dns.Extra[len(dns.Extra)-1].Header().Rrtype == TypeTSIG {
+			return dns.Extra[len(dns.Extra)-1].(*TSIG)
+		}
+	}
+	return nil
+}
+
+// IsEdns0 checks if the message has a EDNS0 (OPT) record, any EDNS0
+// record in the additional section will do. It returns the OPT record
+// found or nil.
+func (dns *Msg) IsEdns0() *OPT {
+	// EDNS0 is at the end of the additional section, start there.
+	// We might want to change this to *only* look at the last two
+	// records. So we see TSIG and/or OPT - this a slightly bigger
+	// change though.
+	for i := len(dns.Extra) - 1; i >= 0; i-- {
+		if dns.Extra[i].Header().Rrtype == TypeOPT {
+			return dns.Extra[i].(*OPT)
+		}
+	}
+	return nil
+}
+
+// IsDomainName checks if s is a valid domain name, it returns the number of
+// labels and true, when a domain name is valid.  Note that non fully qualified
+// domain name is considered valid, in this case the last label is counted in
+// the number of labels.  When false is returned the number of labels is not
+// defined.  Also note that this function is extremely liberal; almost any
+// string is a valid domain name as the DNS is 8 bit protocol. It checks if each
+// label fits in 63 characters, but there is no length check for the entire
+// string s. I.e.  a domain name longer than 255 characters is considered valid.
+func IsDomainName(s string) (labels int, ok bool) {
+	_, labels, err := packDomainName(s, nil, 0, nil, false)
+	return labels, err == nil
+}
+
+// IsSubDomain checks if child is indeed a child of the parent. If child and parent
+// are the same domain true is returned as well.
+func IsSubDomain(parent, child string) bool {
+	// Entire child is contained in parent
+	return CompareDomainName(parent, child) == CountLabel(parent)
+}
+
+// IsMsg sanity checks buf and returns an error if it isn't a valid DNS packet.
+// The checking is performed on the binary payload.
+func IsMsg(buf []byte) error {
+	// Header
+	if len(buf) < 12 {
+		return errors.New("dns: bad message header")
+	}
+	// Header: Opcode
+	// TODO(miek): more checks here, e.g. check all header bits.
+	return nil
+}
+
+// IsFqdn checks if a domain name is fully qualified.
+func IsFqdn(s string) bool {
+	l := len(s)
+	if l == 0 {
+		return false
+	}
+	return s[l-1] == '.'
+}
+
+// IsRRset checks if a set of RRs is a valid RRset as defined by RFC 2181.
+// This means the RRs need to have the same type, name, and class. Returns true
+// if the RR set is valid, otherwise false.
+func IsRRset(rrset []RR) bool {
+	if len(rrset) == 0 {
+		return false
+	}
+	if len(rrset) == 1 {
+		return true
+	}
+	rrHeader := rrset[0].Header()
+	rrType := rrHeader.Rrtype
+	rrClass := rrHeader.Class
+	rrName := rrHeader.Name
+
+	for _, rr := range rrset[1:] {
+		curRRHeader := rr.Header()
+		if curRRHeader.Rrtype != rrType || curRRHeader.Class != rrClass || curRRHeader.Name != rrName {
+			// Mismatch between the records, so this is not a valid rrset for
+			//signing/verifying
+			return false
+		}
+	}
+
+	return true
+}
+
+// Fqdn return the fully qualified domain name from s.
+// If s is already fully qualified, it behaves as the identity function.
+func Fqdn(s string) string {
+	if IsFqdn(s) {
+		return s
+	}
+	return s + "."
+}
+
+// Copied from the official Go code.
+
+// ReverseAddr returns the in-addr.arpa. or ip6.arpa. hostname of the IP
+// address suitable for reverse DNS (PTR) record lookups or an error if it fails
+// to parse the IP address.
+func ReverseAddr(addr string) (arpa string, err error) {
+	ip := net.ParseIP(addr)
+	if ip == nil {
+		return "", &Error{err: "unrecognized address: " + addr}
+	}
+	if ip.To4() != nil {
+		return strconv.Itoa(int(ip[15])) + "." + strconv.Itoa(int(ip[14])) + "." + strconv.Itoa(int(ip[13])) + "." +
+			strconv.Itoa(int(ip[12])) + ".in-addr.arpa.", nil
+	}
+	// Must be IPv6
+	buf := make([]byte, 0, len(ip)*4+len("ip6.arpa."))
+	// Add it, in reverse, to the buffer
+	for i := len(ip) - 1; i >= 0; i-- {
+		v := ip[i]
+		buf = append(buf, hexDigit[v&0xF])
+		buf = append(buf, '.')
+		buf = append(buf, hexDigit[v>>4])
+		buf = append(buf, '.')
+	}
+	// Append "ip6.arpa." and return (buf already has the final .)
+	buf = append(buf, "ip6.arpa."...)
+	return string(buf), nil
+}
+
+// String returns the string representation for the type t.
+func (t Type) String() string {
+	if t1, ok := TypeToString[uint16(t)]; ok {
+		return t1
+	}
+	return "TYPE" + strconv.Itoa(int(t))
+}
+
+// String returns the string representation for the class c.
+func (c Class) String() string {
+	if s, ok := ClassToString[uint16(c)]; ok {
+		// Only emit mnemonics when they are unambiguous, specically ANY is in both.
+		if _, ok := StringToType[s]; !ok {
+			return s
+		}
+	}
+	return "CLASS" + strconv.Itoa(int(c))
+}
+
+// String returns the string representation for the name n.
+func (n Name) String() string {
+	return sprintName(string(n))
+}
diff --git a/vendor/github.com/miekg/dns/dns.go b/vendor/github.com/miekg/dns/dns.go
new file mode 100644
index 0000000..5133eac
--- /dev/null
+++ b/vendor/github.com/miekg/dns/dns.go
@@ -0,0 +1,107 @@
+package dns
+
+import "strconv"
+
+const (
+	year68     = 1 << 31 // For RFC1982 (Serial Arithmetic) calculations in 32 bits.
+	defaultTtl = 3600    // Default internal TTL.
+
+	// DefaultMsgSize is the standard default for messages larger than 512 bytes.
+	DefaultMsgSize = 4096
+	// MinMsgSize is the minimal size of a DNS packet.
+	MinMsgSize = 512
+	// MaxMsgSize is the largest possible DNS packet.
+	MaxMsgSize = 65535
+)
+
+// Error represents a DNS error.
+type Error struct{ err string }
+
+func (e *Error) Error() string {
+	if e == nil {
+		return "dns: <nil>"
+	}
+	return "dns: " + e.err
+}
+
+// An RR represents a resource record.
+type RR interface {
+	// Header returns the header of an resource record. The header contains
+	// everything up to the rdata.
+	Header() *RR_Header
+	// String returns the text representation of the resource record.
+	String() string
+
+	// copy returns a copy of the RR
+	copy() RR
+	// len returns the length (in octets) of the uncompressed RR in wire format.
+	len() int
+	// pack packs an RR into wire format.
+	pack([]byte, int, map[string]int, bool) (int, error)
+}
+
+// RR_Header is the header all DNS resource records share.
+type RR_Header struct {
+	Name     string `dns:"cdomain-name"`
+	Rrtype   uint16
+	Class    uint16
+	Ttl      uint32
+	Rdlength uint16 // Length of data after header.
+}
+
+// Header returns itself. This is here to make RR_Header implements the RR interface.
+func (h *RR_Header) Header() *RR_Header { return h }
+
+// Just to implement the RR interface.
+func (h *RR_Header) copy() RR { return nil }
+
+func (h *RR_Header) copyHeader() *RR_Header {
+	r := new(RR_Header)
+	r.Name = h.Name
+	r.Rrtype = h.Rrtype
+	r.Class = h.Class
+	r.Ttl = h.Ttl
+	r.Rdlength = h.Rdlength
+	return r
+}
+
+func (h *RR_Header) String() string {
+	var s string
+
+	if h.Rrtype == TypeOPT {
+		s = ";"
+		// and maybe other things
+	}
+
+	s += sprintName(h.Name) + "\t"
+	s += strconv.FormatInt(int64(h.Ttl), 10) + "\t"
+	s += Class(h.Class).String() + "\t"
+	s += Type(h.Rrtype).String() + "\t"
+	return s
+}
+
+func (h *RR_Header) len() int {
+	l := len(h.Name) + 1
+	l += 10 // rrtype(2) + class(2) + ttl(4) + rdlength(2)
+	return l
+}
+
+// ToRFC3597 converts a known RR to the unknown RR representation from RFC 3597.
+func (rr *RFC3597) ToRFC3597(r RR) error {
+	buf := make([]byte, r.len()*2)
+	off, err := PackRR(r, buf, 0, nil, false)
+	if err != nil {
+		return err
+	}
+	buf = buf[:off]
+	if int(r.Header().Rdlength) > off {
+		return ErrBuf
+	}
+
+	rfc3597, _, err := unpackRFC3597(*r.Header(), buf, off-int(r.Header().Rdlength))
+	if err != nil {
+		return err
+	}
+	*rr = *rfc3597.(*RFC3597)
+	return nil
+}
diff --git a/vendor/github.com/miekg/dns/dnssec.go b/vendor/github.com/miekg/dns/dnssec.go
new file mode 100644
index 0000000..ac9fdd4
--- /dev/null
+++ b/vendor/github.com/miekg/dns/dnssec.go
@@ -0,0 +1,784 @@
+package dns
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/dsa"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	_ "crypto/md5"
+	"crypto/rand"
+	"crypto/rsa"
+	_ "crypto/sha1"
+	_ "crypto/sha256"
+	_ "crypto/sha512"
+	"encoding/asn1"
+	"encoding/binary"
+	"encoding/hex"
+	"math/big"
+	"sort"
+	"strings"
+	"time"
+
+	"golang.org/x/crypto/ed25519"
+)
+
+// DNSSEC encryption algorithm codes.
+const (
+	_ uint8 = iota
+	RSAMD5
+	DH
+	DSA
+	_ // Skip 4, RFC 6725, section 2.1
+	RSASHA1
+	DSANSEC3SHA1
+	RSASHA1NSEC3SHA1
+	RSASHA256
+	_ // Skip 9, RFC 6725, section 2.1
+	RSASHA512
+	_ // Skip 11, RFC 6725, section 2.1
+	ECCGOST
+	ECDSAP256SHA256
+	ECDSAP384SHA384
+	ED25519
+	ED448
+	INDIRECT   uint8 = 252
+	PRIVATEDNS uint8 = 253 // Private (experimental keys)
+	PRIVATEOID uint8 = 254
+)
+
+// AlgorithmToString is a map of algorithm IDs to algorithm names.
+var AlgorithmToString = map[uint8]string{
+	RSAMD5:           "RSAMD5",
+	DH:               "DH",
+	DSA:              "DSA",
+	RSASHA1:          "RSASHA1",
+	DSANSEC3SHA1:     "DSA-NSEC3-SHA1",
+	RSASHA1NSEC3SHA1: "RSASHA1-NSEC3-SHA1",
+	RSASHA256:        "RSASHA256",
+	RSASHA512:        "RSASHA512",
+	ECCGOST:          "ECC-GOST",
+	ECDSAP256SHA256:  "ECDSAP256SHA256",
+	ECDSAP384SHA384:  "ECDSAP384SHA384",
+	ED25519:          "ED25519",
+	ED448:            "ED448",
+	INDIRECT:         "INDIRECT",
+	PRIVATEDNS:       "PRIVATEDNS",
+	PRIVATEOID:       "PRIVATEOID",
+}
+
+// StringToAlgorithm is the reverse of AlgorithmToString.
+var StringToAlgorithm = reverseInt8(AlgorithmToString)
+
+// AlgorithmToHash is a map of algorithm crypto hash IDs to crypto.Hash's.
+var AlgorithmToHash = map[uint8]crypto.Hash{
+	RSAMD5:           crypto.MD5, // Deprecated in RFC 6725
+	RSASHA1:          crypto.SHA1,
+	RSASHA1NSEC3SHA1: crypto.SHA1,
+	RSASHA256:        crypto.SHA256,
+	ECDSAP256SHA256:  crypto.SHA256,
+	ECDSAP384SHA384:  crypto.SHA384,
+	RSASHA512:        crypto.SHA512,
+	ED25519:          crypto.Hash(0),
+}
+
+// DNSSEC hashing algorithm codes.
+const (
+	_      uint8 = iota
+	SHA1         // RFC 4034
+	SHA256       // RFC 4509
+	GOST94       // RFC 5933
+	SHA384       // Experimental
+	SHA512       // Experimental
+)
+
+// HashToString is a map of hash IDs to names.
+var HashToString = map[uint8]string{
+	SHA1:   "SHA1",
+	SHA256: "SHA256",
+	GOST94: "GOST94",
+	SHA384: "SHA384",
+	SHA512: "SHA512",
+}
+
+// StringToHash is a map of names to hash IDs.
+var StringToHash = reverseInt8(HashToString)
+
+// DNSKEY flag values.
+const (
+	SEP    = 1
+	REVOKE = 1 << 7
+	ZONE   = 1 << 8
+)
+
+// The RRSIG needs to be converted to wireformat with some of the rdata (the signature) missing.
+type rrsigWireFmt struct {
+	TypeCovered uint16
+	Algorithm   uint8
+	Labels      uint8
+	OrigTtl     uint32
+	Expiration  uint32
+	Inception   uint32
+	KeyTag      uint16
+	SignerName  string `dns:"domain-name"`
+	/* No Signature */
+}
+
+// Used for converting DNSKEY's rdata to wirefmt.
+type dnskeyWireFmt struct {
+	Flags     uint16
+	Protocol  uint8
+	Algorithm uint8
+	PublicKey string `dns:"base64"`
+	/* Nothing is left out */
+}
+
+func divRoundUp(a, b int) int {
+	return (a + b - 1) / b
+}
+
+// KeyTag calculates the keytag (or key-id) of the DNSKEY.
+func (k *DNSKEY) KeyTag() uint16 {
+	if k == nil {
+		return 0
+	}
+	var keytag int
+	switch k.Algorithm {
+	case RSAMD5:
+		// Look at the bottom two bytes of the modules, which the last
+		// item in the pubkey. We could do this faster by looking directly
+		// at the base64 values. But I'm lazy.
+		modulus, _ := fromBase64([]byte(k.PublicKey))
+		if len(modulus) > 1 {
+			x := binary.BigEndian.Uint16(modulus[len(modulus)-2:])
+			keytag = int(x)
+		}
+	default:
+		keywire := new(dnskeyWireFmt)
+		keywire.Flags = k.Flags
+		keywire.Protocol = k.Protocol
+		keywire.Algorithm = k.Algorithm
+		keywire.PublicKey = k.PublicKey
+		wire := make([]byte, DefaultMsgSize)
+		n, err := packKeyWire(keywire, wire)
+		if err != nil {
+			return 0
+		}
+		wire = wire[:n]
+		for i, v := range wire {
+			if i&1 != 0 {
+				keytag += int(v) // must be larger than uint32
+			} else {
+				keytag += int(v) << 8
+			}
+		}
+		keytag += (keytag >> 16) & 0xFFFF
+		keytag &= 0xFFFF
+	}
+	return uint16(keytag)
+}
+
+// ToDS converts a DNSKEY record to a DS record.
+func (k *DNSKEY) ToDS(h uint8) *DS {
+	if k == nil {
+		return nil
+	}
+	ds := new(DS)
+	ds.Hdr.Name = k.Hdr.Name
+	ds.Hdr.Class = k.Hdr.Class
+	ds.Hdr.Rrtype = TypeDS
+	ds.Hdr.Ttl = k.Hdr.Ttl
+	ds.Algorithm = k.Algorithm
+	ds.DigestType = h
+	ds.KeyTag = k.KeyTag()
+
+	keywire := new(dnskeyWireFmt)
+	keywire.Flags = k.Flags
+	keywire.Protocol = k.Protocol
+	keywire.Algorithm = k.Algorithm
+	keywire.PublicKey = k.PublicKey
+	wire := make([]byte, DefaultMsgSize)
+	n, err := packKeyWire(keywire, wire)
+	if err != nil {
+		return nil
+	}
+	wire = wire[:n]
+
+	owner := make([]byte, 255)
+	off, err1 := PackDomainName(strings.ToLower(k.Hdr.Name), owner, 0, nil, false)
+	if err1 != nil {
+		return nil
+	}
+	owner = owner[:off]
+	// RFC4034:
+	// digest = digest_algorithm( DNSKEY owner name | DNSKEY RDATA);
+	// "|" denotes concatenation
+	// DNSKEY RDATA = Flags | Protocol | Algorithm | Public Key.
+
+	var hash crypto.Hash
+	switch h {
+	case SHA1:
+		hash = crypto.SHA1
+	case SHA256:
+		hash = crypto.SHA256
+	case SHA384:
+		hash = crypto.SHA384
+	case SHA512:
+		hash = crypto.SHA512
+	default:
+		return nil
+	}
+
+	s := hash.New()
+	s.Write(owner)
+	s.Write(wire)
+	ds.Digest = hex.EncodeToString(s.Sum(nil))
+	return ds
+}
+
+// ToCDNSKEY converts a DNSKEY record to a CDNSKEY record.
+func (k *DNSKEY) ToCDNSKEY() *CDNSKEY {
+	c := &CDNSKEY{DNSKEY: *k}
+	c.Hdr = *k.Hdr.copyHeader()
+	c.Hdr.Rrtype = TypeCDNSKEY
+	return c
+}
+
+// ToCDS converts a DS record to a CDS record.
+func (d *DS) ToCDS() *CDS {
+	c := &CDS{DS: *d}
+	c.Hdr = *d.Hdr.copyHeader()
+	c.Hdr.Rrtype = TypeCDS
+	return c
+}
+
+// Sign signs an RRSet. The signature needs to be filled in with the values:
+// Inception, Expiration, KeyTag, SignerName and Algorithm.  The rest is copied
+// from the RRset. Sign returns a non-nill error when the signing went OK.
+// There is no check if RRSet is a proper (RFC 2181) RRSet.  If OrigTTL is non
+// zero, it is used as-is, otherwise the TTL of the RRset is used as the
+// OrigTTL.
+func (rr *RRSIG) Sign(k crypto.Signer, rrset []RR) error {
+	if k == nil {
+		return ErrPrivKey
+	}
+	// s.Inception and s.Expiration may be 0 (rollover etc.), the rest must be set
+	if rr.KeyTag == 0 || len(rr.SignerName) == 0 || rr.Algorithm == 0 {
+		return ErrKey
+	}
+
+	rr.Hdr.Rrtype = TypeRRSIG
+	rr.Hdr.Name = rrset[0].Header().Name
+	rr.Hdr.Class = rrset[0].Header().Class
+	if rr.OrigTtl == 0 { // If set don't override
+		rr.OrigTtl = rrset[0].Header().Ttl
+	}
+	rr.TypeCovered = rrset[0].Header().Rrtype
+	rr.Labels = uint8(CountLabel(rrset[0].Header().Name))
+
+	if strings.HasPrefix(rrset[0].Header().Name, "*") {
+		rr.Labels-- // wildcard, remove from label count
+	}
+
+	sigwire := new(rrsigWireFmt)
+	sigwire.TypeCovered = rr.TypeCovered
+	sigwire.Algorithm = rr.Algorithm
+	sigwire.Labels = rr.Labels
+	sigwire.OrigTtl = rr.OrigTtl
+	sigwire.Expiration = rr.Expiration
+	sigwire.Inception = rr.Inception
+	sigwire.KeyTag = rr.KeyTag
+	// For signing, lowercase this name
+	sigwire.SignerName = strings.ToLower(rr.SignerName)
+
+	// Create the desired binary blob
+	signdata := make([]byte, DefaultMsgSize)
+	n, err := packSigWire(sigwire, signdata)
+	if err != nil {
+		return err
+	}
+	signdata = signdata[:n]
+	wire, err := rawSignatureData(rrset, rr)
+	if err != nil {
+		return err
+	}
+
+	hash, ok := AlgorithmToHash[rr.Algorithm]
+	if !ok {
+		return ErrAlg
+	}
+
+	switch rr.Algorithm {
+	case ED25519:
+		// ed25519 signs the raw message and performs hashing internally.
+		// All other supported signature schemes operate over the pre-hashed
+		// message, and thus ed25519 must be handled separately here.
+		//
+		// The raw message is passed directly into sign and crypto.Hash(0) is
+		// used to signal to the crypto.Signer that the data has not been hashed.
+		signature, err := sign(k, append(signdata, wire...), crypto.Hash(0), rr.Algorithm)
+		if err != nil {
+			return err
+		}
+
+		rr.Signature = toBase64(signature)
+	default:
+		h := hash.New()
+		h.Write(signdata)
+		h.Write(wire)
+
+		signature, err := sign(k, h.Sum(nil), hash, rr.Algorithm)
+		if err != nil {
+			return err
+		}
+
+		rr.Signature = toBase64(signature)
+	}
+
+	return nil
+}
+
+func sign(k crypto.Signer, hashed []byte, hash crypto.Hash, alg uint8) ([]byte, error) {
+	signature, err := k.Sign(rand.Reader, hashed, hash)
+	if err != nil {
+		return nil, err
+	}
+
+	switch alg {
+	case RSASHA1, RSASHA1NSEC3SHA1, RSASHA256, RSASHA512:
+		return signature, nil
+
+	case ECDSAP256SHA256, ECDSAP384SHA384:
+		ecdsaSignature := &struct {
+			R, S *big.Int
+		}{}
+		if _, err := asn1.Unmarshal(signature, ecdsaSignature); err != nil {
+			return nil, err
+		}
+
+		var intlen int
+		switch alg {
+		case ECDSAP256SHA256:
+			intlen = 32
+		case ECDSAP384SHA384:
+			intlen = 48
+		}
+
+		signature := intToBytes(ecdsaSignature.R, intlen)
+		signature = append(signature, intToBytes(ecdsaSignature.S, intlen)...)
+		return signature, nil
+
+	// There is no defined interface for what a DSA backed crypto.Signer returns
+	case DSA, DSANSEC3SHA1:
+		// 	t := divRoundUp(divRoundUp(p.PublicKey.Y.BitLen(), 8)-64, 8)
+		// 	signature := []byte{byte(t)}
+		// 	signature = append(signature, intToBytes(r1, 20)...)
+		// 	signature = append(signature, intToBytes(s1, 20)...)
+		// 	rr.Signature = signature
+
+	case ED25519:
+		return signature, nil
+	}
+
+	return nil, ErrAlg
+}
+
+// Verify validates an RRSet with the signature and key. This is only the
+// cryptographic test, the signature validity period must be checked separately.
+// This function copies the rdata of some RRs (to lowercase domain names) for the validation to work.
+func (rr *RRSIG) Verify(k *DNSKEY, rrset []RR) error {
+	// First the easy checks
+	if !IsRRset(rrset) {
+		return ErrRRset
+	}
+	if rr.KeyTag != k.KeyTag() {
+		return ErrKey
+	}
+	if rr.Hdr.Class != k.Hdr.Class {
+		return ErrKey
+	}
+	if rr.Algorithm != k.Algorithm {
+		return ErrKey
+	}
+	if strings.ToLower(rr.SignerName) != strings.ToLower(k.Hdr.Name) {
+		return ErrKey
+	}
+	if k.Protocol != 3 {
+		return ErrKey
+	}
+
+	// IsRRset checked that we have at least one RR and that the RRs in
+	// the set have consistent type, class, and name. Also check that type and
+	// class matches the RRSIG record.
+	if rrset[0].Header().Class != rr.Hdr.Class {
+		return ErrRRset
+	}
+	if rrset[0].Header().Rrtype != rr.TypeCovered {
+		return ErrRRset
+	}
+
+	// RFC 4035 5.3.2.  Reconstructing the Signed Data
+	// Copy the sig, except the rrsig data
+	sigwire := new(rrsigWireFmt)
+	sigwire.TypeCovered = rr.TypeCovered
+	sigwire.Algorithm = rr.Algorithm
+	sigwire.Labels = rr.Labels
+	sigwire.OrigTtl = rr.OrigTtl
+	sigwire.Expiration = rr.Expiration
+	sigwire.Inception = rr.Inception
+	sigwire.KeyTag = rr.KeyTag
+	sigwire.SignerName = strings.ToLower(rr.SignerName)
+	// Create the desired binary blob
+	signeddata := make([]byte, DefaultMsgSize)
+	n, err := packSigWire(sigwire, signeddata)
+	if err != nil {
+		return err
+	}
+	signeddata = signeddata[:n]
+	wire, err := rawSignatureData(rrset, rr)
+	if err != nil {
+		return err
+	}
+
+	sigbuf := rr.sigBuf()           // Get the binary signature data
+	if rr.Algorithm == PRIVATEDNS { // PRIVATEOID
+		// TODO(miek)
+		// remove the domain name and assume its ours?
+	}
+
+	hash, ok := AlgorithmToHash[rr.Algorithm]
+	if !ok {
+		return ErrAlg
+	}
+
+	switch rr.Algorithm {
+	case RSASHA1, RSASHA1NSEC3SHA1, RSASHA256, RSASHA512, RSAMD5:
+		// TODO(mg): this can be done quicker, ie. cache the pubkey data somewhere??
+		pubkey := k.publicKeyRSA() // Get the key
+		if pubkey == nil {
+			return ErrKey
+		}
+
+		h := hash.New()
+		h.Write(signeddata)
+		h.Write(wire)
+		return rsa.VerifyPKCS1v15(pubkey, hash, h.Sum(nil), sigbuf)
+
+	case ECDSAP256SHA256, ECDSAP384SHA384:
+		pubkey := k.publicKeyECDSA()
+		if pubkey == nil {
+			return ErrKey
+		}
+
+		// Split sigbuf into the r and s coordinates
+		r := new(big.Int).SetBytes(sigbuf[:len(sigbuf)/2])
+		s := new(big.Int).SetBytes(sigbuf[len(sigbuf)/2:])
+
+		h := hash.New()
+		h.Write(signeddata)
+		h.Write(wire)
+		if ecdsa.Verify(pubkey, h.Sum(nil), r, s) {
+			return nil
+		}
+		return ErrSig
+
+	case ED25519:
+		pubkey := k.publicKeyED25519()
+		if pubkey == nil {
+			return ErrKey
+		}
+
+		if ed25519.Verify(pubkey, append(signeddata, wire...), sigbuf) {
+			return nil
+		}
+		return ErrSig
+
+	default:
+		return ErrAlg
+	}
+}
+
+// ValidityPeriod uses RFC1982 serial arithmetic to calculate
+// if a signature period is valid. If t is the zero time, the
+// current time is taken other t is. Returns true if the signature
+// is valid at the given time, otherwise returns false.
+func (rr *RRSIG) ValidityPeriod(t time.Time) bool {
+	var utc int64
+	if t.IsZero() {
+		utc = time.Now().UTC().Unix()
+	} else {
+		utc = t.UTC().Unix()
+	}
+	modi := (int64(rr.Inception) - utc) / year68
+	mode := (int64(rr.Expiration) - utc) / year68
+	ti := int64(rr.Inception) + (modi * year68)
+	te := int64(rr.Expiration) + (mode * year68)
+	return ti <= utc && utc <= te
+}
+
+// Return the signatures base64 encodedig sigdata as a byte slice.
+func (rr *RRSIG) sigBuf() []byte {
+	sigbuf, err := fromBase64([]byte(rr.Signature))
+	if err != nil {
+		return nil
+	}
+	return sigbuf
+}
+
+// publicKeyRSA returns the RSA public key from a DNSKEY record.
+func (k *DNSKEY) publicKeyRSA() *rsa.PublicKey {
+	keybuf, err := fromBase64([]byte(k.PublicKey))
+	if err != nil {
+		return nil
+	}
+
+	// RFC 2537/3110, section 2. RSA Public KEY Resource Records
+	// Length is in the 0th byte, unless its zero, then it
+	// it in bytes 1 and 2 and its a 16 bit number
+	explen := uint16(keybuf[0])
+	keyoff := 1
+	if explen == 0 {
+		explen = uint16(keybuf[1])<<8 | uint16(keybuf[2])
+		keyoff = 3
+	}
+	pubkey := new(rsa.PublicKey)
+
+	pubkey.N = big.NewInt(0)
+	shift := uint64((explen - 1) * 8)
+	expo := uint64(0)
+	for i := int(explen - 1); i > 0; i-- {
+		expo += uint64(keybuf[keyoff+i]) << shift
+		shift -= 8
+	}
+	// Remainder
+	expo += uint64(keybuf[keyoff])
+	if expo > (2<<31)+1 {
+		// Larger expo than supported.
+		// println("dns: F5 primes (or larger) are not supported")
+		return nil
+	}
+	pubkey.E = int(expo)
+
+	pubkey.N.SetBytes(keybuf[keyoff+int(explen):])
+	return pubkey
+}
+
+// publicKeyECDSA returns the Curve public key from the DNSKEY record.
+func (k *DNSKEY) publicKeyECDSA() *ecdsa.PublicKey {
+	keybuf, err := fromBase64([]byte(k.PublicKey))
+	if err != nil {
+		return nil
+	}
+	pubkey := new(ecdsa.PublicKey)
+	switch k.Algorithm {
+	case ECDSAP256SHA256:
+		pubkey.Curve = elliptic.P256()
+		if len(keybuf) != 64 {
+			// wrongly encoded key
+			return nil
+		}
+	case ECDSAP384SHA384:
+		pubkey.Curve = elliptic.P384()
+		if len(keybuf) != 96 {
+			// Wrongly encoded key
+			return nil
+		}
+	}
+	pubkey.X = big.NewInt(0)
+	pubkey.X.SetBytes(keybuf[:len(keybuf)/2])
+	pubkey.Y = big.NewInt(0)
+	pubkey.Y.SetBytes(keybuf[len(keybuf)/2:])
+	return pubkey
+}
+
+func (k *DNSKEY) publicKeyDSA() *dsa.PublicKey {
+	keybuf, err := fromBase64([]byte(k.PublicKey))
+	if err != nil {
+		return nil
+	}
+	if len(keybuf) < 22 {
+		return nil
+	}
+	t, keybuf := int(keybuf[0]), keybuf[1:]
+	size := 64 + t*8
+	q, keybuf := keybuf[:20], keybuf[20:]
+	if len(keybuf) != 3*size {
+		return nil
+	}
+	p, keybuf := keybuf[:size], keybuf[size:]
+	g, y := keybuf[:size], keybuf[size:]
+	pubkey := new(dsa.PublicKey)
+	pubkey.Parameters.Q = big.NewInt(0).SetBytes(q)
+	pubkey.Parameters.P = big.NewInt(0).SetBytes(p)
+	pubkey.Parameters.G = big.NewInt(0).SetBytes(g)
+	pubkey.Y = big.NewInt(0).SetBytes(y)
+	return pubkey
+}
+
+func (k *DNSKEY) publicKeyED25519() ed25519.PublicKey {
+	keybuf, err := fromBase64([]byte(k.PublicKey))
+	if err != nil {
+		return nil
+	}
+	if len(keybuf) != ed25519.PublicKeySize {
+		return nil
+	}
+	return keybuf
+}
+
+type wireSlice [][]byte
+
+func (p wireSlice) Len() int      { return len(p) }
+func (p wireSlice) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
+func (p wireSlice) Less(i, j int) bool {
+	_, ioff, _ := UnpackDomainName(p[i], 0)
+	_, joff, _ := UnpackDomainName(p[j], 0)
+	return bytes.Compare(p[i][ioff+10:], p[j][joff+10:]) < 0
+}
+
+// Return the raw signature data.
+func rawSignatureData(rrset []RR, s *RRSIG) (buf []byte, err error) {
+	wires := make(wireSlice, len(rrset))
+	for i, r := range rrset {
+		r1 := r.copy()
+		r1.Header().Ttl = s.OrigTtl
+		labels := SplitDomainName(r1.Header().Name)
+		// 6.2. Canonical RR Form. (4) - wildcards
+		if len(labels) > int(s.Labels) {
+			// Wildcard
+			r1.Header().Name = "*." + strings.Join(labels[len(labels)-int(s.Labels):], ".") + "."
+		}
+		// RFC 4034: 6.2.  Canonical RR Form. (2) - domain name to lowercase
+		r1.Header().Name = strings.ToLower(r1.Header().Name)
+		// 6.2. Canonical RR Form. (3) - domain rdata to lowercase.
+		//   NS, MD, MF, CNAME, SOA, MB, MG, MR, PTR,
+		//   HINFO, MINFO, MX, RP, AFSDB, RT, SIG, PX, NXT, NAPTR, KX,
+		//   SRV, DNAME, A6
+		//
+		// RFC 6840 - Clarifications and Implementation Notes for DNS Security (DNSSEC):
+		//	Section 6.2 of [RFC4034] also erroneously lists HINFO as a record
+		//	that needs conversion to lowercase, and twice at that.  Since HINFO
+		//	records contain no domain names, they are not subject to case
+		//	conversion.
+		switch x := r1.(type) {
+		case *NS:
+			x.Ns = strings.ToLower(x.Ns)
+		case *MD:
+			x.Md = strings.ToLower(x.Md)
+		case *MF:
+			x.Mf = strings.ToLower(x.Mf)
+		case *CNAME:
+			x.Target = strings.ToLower(x.Target)
+		case *SOA:
+			x.Ns = strings.ToLower(x.Ns)
+			x.Mbox = strings.ToLower(x.Mbox)
+		case *MB:
+			x.Mb = strings.ToLower(x.Mb)
+		case *MG:
+			x.Mg = strings.ToLower(x.Mg)
+		case *MR:
+			x.Mr = strings.ToLower(x.Mr)
+		case *PTR:
+			x.Ptr = strings.ToLower(x.Ptr)
+		case *MINFO:
+			x.Rmail = strings.ToLower(x.Rmail)
+			x.Email = strings.ToLower(x.Email)
+		case *MX:
+			x.Mx = strings.ToLower(x.Mx)
+		case *RP:
+			x.Mbox = strings.ToLower(x.Mbox)
+			x.Txt = strings.ToLower(x.Txt)
+		case *AFSDB:
+			x.Hostname = strings.ToLower(x.Hostname)
+		case *RT:
+			x.Host = strings.ToLower(x.Host)
+		case *SIG:
+			x.SignerName = strings.ToLower(x.SignerName)
+		case *PX:
+			x.Map822 = strings.ToLower(x.Map822)
+			x.Mapx400 = strings.ToLower(x.Mapx400)
+		case *NAPTR:
+			x.Replacement = strings.ToLower(x.Replacement)
+		case *KX:
+			x.Exchanger = strings.ToLower(x.Exchanger)
+		case *SRV:
+			x.Target = strings.ToLower(x.Target)
+		case *DNAME:
+			x.Target = strings.ToLower(x.Target)
+		}
+		// 6.2. Canonical RR Form. (5) - origTTL
+		wire := make([]byte, r1.len()+1) // +1 to be safe(r)
+		off, err1 := PackRR(r1, wire, 0, nil, false)
+		if err1 != nil {
+			return nil, err1
+		}
+		wire = wire[:off]
+		wires[i] = wire
+	}
+	sort.Sort(wires)
+	for i, wire := range wires {
+		if i > 0 && bytes.Equal(wire, wires[i-1]) {
+			continue
+		}
+		buf = append(buf, wire...)
+	}
+	return buf, nil
+}
+
+func packSigWire(sw *rrsigWireFmt, msg []byte) (int, error) {
+	// copied from zmsg.go RRSIG packing
+	off, err := packUint16(sw.TypeCovered, msg, 0)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(sw.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(sw.Labels, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(sw.OrigTtl, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(sw.Expiration, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(sw.Inception, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(sw.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(sw.SignerName, msg, off, nil, false)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
+
+func packKeyWire(dw *dnskeyWireFmt, msg []byte) (int, error) {
+	// copied from zmsg.go DNSKEY packing
+	off, err := packUint16(dw.Flags, msg, 0)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(dw.Protocol, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(dw.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(dw.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
diff --git a/vendor/github.com/miekg/dns/dnssec_keygen.go b/vendor/github.com/miekg/dns/dnssec_keygen.go
new file mode 100644
index 0000000..33e913a
--- /dev/null
+++ b/vendor/github.com/miekg/dns/dnssec_keygen.go
@@ -0,0 +1,178 @@
+package dns
+
+import (
+	"crypto"
+	"crypto/dsa"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/rsa"
+	"math/big"
+
+	"golang.org/x/crypto/ed25519"
+)
+
+// Generate generates a DNSKEY of the given bit size.
+// The public part is put inside the DNSKEY record.
+// The Algorithm in the key must be set as this will define
+// what kind of DNSKEY will be generated.
+// The ECDSA algorithms imply a fixed keysize, in that case
+// bits should be set to the size of the algorithm.
+func (k *DNSKEY) Generate(bits int) (crypto.PrivateKey, error) {
+	switch k.Algorithm {
+	case DSA, DSANSEC3SHA1:
+		if bits != 1024 {
+			return nil, ErrKeySize
+		}
+	case RSAMD5, RSASHA1, RSASHA256, RSASHA1NSEC3SHA1:
+		if bits < 512 || bits > 4096 {
+			return nil, ErrKeySize
+		}
+	case RSASHA512:
+		if bits < 1024 || bits > 4096 {
+			return nil, ErrKeySize
+		}
+	case ECDSAP256SHA256:
+		if bits != 256 {
+			return nil, ErrKeySize
+		}
+	case ECDSAP384SHA384:
+		if bits != 384 {
+			return nil, ErrKeySize
+		}
+	case ED25519:
+		if bits != 256 {
+			return nil, ErrKeySize
+		}
+	}
+
+	switch k.Algorithm {
+	case DSA, DSANSEC3SHA1:
+		params := new(dsa.Parameters)
+		if err := dsa.GenerateParameters(params, rand.Reader, dsa.L1024N160); err != nil {
+			return nil, err
+		}
+		priv := new(dsa.PrivateKey)
+		priv.PublicKey.Parameters = *params
+		err := dsa.GenerateKey(priv, rand.Reader)
+		if err != nil {
+			return nil, err
+		}
+		k.setPublicKeyDSA(params.Q, params.P, params.G, priv.PublicKey.Y)
+		return priv, nil
+	case RSAMD5, RSASHA1, RSASHA256, RSASHA512, RSASHA1NSEC3SHA1:
+		priv, err := rsa.GenerateKey(rand.Reader, bits)
+		if err != nil {
+			return nil, err
+		}
+		k.setPublicKeyRSA(priv.PublicKey.E, priv.PublicKey.N)
+		return priv, nil
+	case ECDSAP256SHA256, ECDSAP384SHA384:
+		var c elliptic.Curve
+		switch k.Algorithm {
+		case ECDSAP256SHA256:
+			c = elliptic.P256()
+		case ECDSAP384SHA384:
+			c = elliptic.P384()
+		}
+		priv, err := ecdsa.GenerateKey(c, rand.Reader)
+		if err != nil {
+			return nil, err
+		}
+		k.setPublicKeyECDSA(priv.PublicKey.X, priv.PublicKey.Y)
+		return priv, nil
+	case ED25519:
+		pub, priv, err := ed25519.GenerateKey(rand.Reader)
+		if err != nil {
+			return nil, err
+		}
+		k.setPublicKeyED25519(pub)
+		return priv, nil
+	default:
+		return nil, ErrAlg
+	}
+}
+
+// Set the public key (the value E and N)
+func (k *DNSKEY) setPublicKeyRSA(_E int, _N *big.Int) bool {
+	if _E == 0 || _N == nil {
+		return false
+	}
+	buf := exponentToBuf(_E)
+	buf = append(buf, _N.Bytes()...)
+	k.PublicKey = toBase64(buf)
+	return true
+}
+
+// Set the public key for Elliptic Curves
+func (k *DNSKEY) setPublicKeyECDSA(_X, _Y *big.Int) bool {
+	if _X == nil || _Y == nil {
+		return false
+	}
+	var intlen int
+	switch k.Algorithm {
+	case ECDSAP256SHA256:
+		intlen = 32
+	case ECDSAP384SHA384:
+		intlen = 48
+	}
+	k.PublicKey = toBase64(curveToBuf(_X, _Y, intlen))
+	return true
+}
+
+// Set the public key for DSA
+func (k *DNSKEY) setPublicKeyDSA(_Q, _P, _G, _Y *big.Int) bool {
+	if _Q == nil || _P == nil || _G == nil || _Y == nil {
+		return false
+	}
+	buf := dsaToBuf(_Q, _P, _G, _Y)
+	k.PublicKey = toBase64(buf)
+	return true
+}
+
+// Set the public key for Ed25519
+func (k *DNSKEY) setPublicKeyED25519(_K ed25519.PublicKey) bool {
+	if _K == nil {
+		return false
+	}
+	k.PublicKey = toBase64(_K)
+	return true
+}
+
+// Set the public key (the values E and N) for RSA
+// RFC 3110: Section 2. RSA Public KEY Resource Records
+func exponentToBuf(_E int) []byte {
+	var buf []byte
+	i := big.NewInt(int64(_E)).Bytes()
+	if len(i) < 256 {
+		buf = make([]byte, 1, 1+len(i))
+		buf[0] = uint8(len(i))
+	} else {
+		buf = make([]byte, 3, 3+len(i))
+		buf[0] = 0
+		buf[1] = uint8(len(i) >> 8)
+		buf[2] = uint8(len(i))
+	}
+	buf = append(buf, i...)
+	return buf
+}
+
+// Set the public key for X and Y for Curve. The two
+// values are just concatenated.
+func curveToBuf(_X, _Y *big.Int, intlen int) []byte {
+	buf := intToBytes(_X, intlen)
+	buf = append(buf, intToBytes(_Y, intlen)...)
+	return buf
+}
+
+// Set the public key for X and Y for Curve. The two
+// values are just concatenated.
+func dsaToBuf(_Q, _P, _G, _Y *big.Int) []byte {
+	t := divRoundUp(divRoundUp(_G.BitLen(), 8)-64, 8)
+	buf := []byte{byte(t)}
+	buf = append(buf, intToBytes(_Q, 20)...)
+	buf = append(buf, intToBytes(_P, 64+t*8)...)
+	buf = append(buf, intToBytes(_G, 64+t*8)...)
+	buf = append(buf, intToBytes(_Y, 64+t*8)...)
+	return buf
+}
diff --git a/vendor/github.com/miekg/dns/dnssec_keyscan.go b/vendor/github.com/miekg/dns/dnssec_keyscan.go
new file mode 100644
index 0000000..e2d9d8f
--- /dev/null
+++ b/vendor/github.com/miekg/dns/dnssec_keyscan.go
@@ -0,0 +1,297 @@
+package dns
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/dsa"
+	"crypto/ecdsa"
+	"crypto/rsa"
+	"io"
+	"math/big"
+	"strconv"
+	"strings"
+
+	"golang.org/x/crypto/ed25519"
+)
+
+// NewPrivateKey returns a PrivateKey by parsing the string s.
+// s should be in the same form of the BIND private key files.
+func (k *DNSKEY) NewPrivateKey(s string) (crypto.PrivateKey, error) {
+	if s == "" || s[len(s)-1] != '\n' { // We need a closing newline
+		return k.ReadPrivateKey(strings.NewReader(s+"\n"), "")
+	}
+	return k.ReadPrivateKey(strings.NewReader(s), "")
+}
+
+// ReadPrivateKey reads a private key from the io.Reader q. The string file is
+// only used in error reporting.
+// The public key must be known, because some cryptographic algorithms embed
+// the public inside the privatekey.
+func (k *DNSKEY) ReadPrivateKey(q io.Reader, file string) (crypto.PrivateKey, error) {
+	m, err := parseKey(q, file)
+	if m == nil {
+		return nil, err
+	}
+	if _, ok := m["private-key-format"]; !ok {
+		return nil, ErrPrivKey
+	}
+	if m["private-key-format"] != "v1.2" && m["private-key-format"] != "v1.3" {
+		return nil, ErrPrivKey
+	}
+	// TODO(mg): check if the pubkey matches the private key
+	algo, err := strconv.ParseUint(strings.SplitN(m["algorithm"], " ", 2)[0], 10, 8)
+	if err != nil {
+		return nil, ErrPrivKey
+	}
+	switch uint8(algo) {
+	case DSA:
+		priv, err := readPrivateKeyDSA(m)
+		if err != nil {
+			return nil, err
+		}
+		pub := k.publicKeyDSA()
+		if pub == nil {
+			return nil, ErrKey
+		}
+		priv.PublicKey = *pub
+		return priv, nil
+	case RSAMD5:
+		fallthrough
+	case RSASHA1:
+		fallthrough
+	case RSASHA1NSEC3SHA1:
+		fallthrough
+	case RSASHA256:
+		fallthrough
+	case RSASHA512:
+		priv, err := readPrivateKeyRSA(m)
+		if err != nil {
+			return nil, err
+		}
+		pub := k.publicKeyRSA()
+		if pub == nil {
+			return nil, ErrKey
+		}
+		priv.PublicKey = *pub
+		return priv, nil
+	case ECCGOST:
+		return nil, ErrPrivKey
+	case ECDSAP256SHA256:
+		fallthrough
+	case ECDSAP384SHA384:
+		priv, err := readPrivateKeyECDSA(m)
+		if err != nil {
+			return nil, err
+		}
+		pub := k.publicKeyECDSA()
+		if pub == nil {
+			return nil, ErrKey
+		}
+		priv.PublicKey = *pub
+		return priv, nil
+	case ED25519:
+		return readPrivateKeyED25519(m)
+	default:
+		return nil, ErrPrivKey
+	}
+}
+
+// Read a private key (file) string and create a public key. Return the private key.
+func readPrivateKeyRSA(m map[string]string) (*rsa.PrivateKey, error) {
+	p := new(rsa.PrivateKey)
+	p.Primes = []*big.Int{nil, nil}
+	for k, v := range m {
+		switch k {
+		case "modulus", "publicexponent", "privateexponent", "prime1", "prime2":
+			v1, err := fromBase64([]byte(v))
+			if err != nil {
+				return nil, err
+			}
+			switch k {
+			case "modulus":
+				p.PublicKey.N = big.NewInt(0)
+				p.PublicKey.N.SetBytes(v1)
+			case "publicexponent":
+				i := big.NewInt(0)
+				i.SetBytes(v1)
+				p.PublicKey.E = int(i.Int64()) // int64 should be large enough
+			case "privateexponent":
+				p.D = big.NewInt(0)
+				p.D.SetBytes(v1)
+			case "prime1":
+				p.Primes[0] = big.NewInt(0)
+				p.Primes[0].SetBytes(v1)
+			case "prime2":
+				p.Primes[1] = big.NewInt(0)
+				p.Primes[1].SetBytes(v1)
+			}
+		case "exponent1", "exponent2", "coefficient":
+			// not used in Go (yet)
+		case "created", "publish", "activate":
+			// not used in Go (yet)
+		}
+	}
+	return p, nil
+}
+
+func readPrivateKeyDSA(m map[string]string) (*dsa.PrivateKey, error) {
+	p := new(dsa.PrivateKey)
+	p.X = big.NewInt(0)
+	for k, v := range m {
+		switch k {
+		case "private_value(x)":
+			v1, err := fromBase64([]byte(v))
+			if err != nil {
+				return nil, err
+			}
+			p.X.SetBytes(v1)
+		case "created", "publish", "activate":
+			/* not used in Go (yet) */
+		}
+	}
+	return p, nil
+}
+
+func readPrivateKeyECDSA(m map[string]string) (*ecdsa.PrivateKey, error) {
+	p := new(ecdsa.PrivateKey)
+	p.D = big.NewInt(0)
+	// TODO: validate that the required flags are present
+	for k, v := range m {
+		switch k {
+		case "privatekey":
+			v1, err := fromBase64([]byte(v))
+			if err != nil {
+				return nil, err
+			}
+			p.D.SetBytes(v1)
+		case "created", "publish", "activate":
+			/* not used in Go (yet) */
+		}
+	}
+	return p, nil
+}
+
+func readPrivateKeyED25519(m map[string]string) (ed25519.PrivateKey, error) {
+	var p ed25519.PrivateKey
+	// TODO: validate that the required flags are present
+	for k, v := range m {
+		switch k {
+		case "privatekey":
+			p1, err := fromBase64([]byte(v))
+			if err != nil {
+				return nil, err
+			}
+			if len(p1) != 32 {
+				return nil, ErrPrivKey
+			}
+			// RFC 8080 and Golang's x/crypto/ed25519 differ as to how the
+			// private keys are represented. RFC 8080 specifies that private
+			// keys be stored solely as the seed value (p1 above) while the
+			// ed25519 package represents them as the seed value concatenated
+			// to the public key, which is derived from the seed value.
+			//
+			// ed25519.GenerateKey reads exactly 32 bytes from the passed in
+			// io.Reader and uses them as the seed. It also derives the
+			// public key and produces a compatible private key.
+			_, p, err = ed25519.GenerateKey(bytes.NewReader(p1))
+			if err != nil {
+				return nil, err
+			}
+		case "created", "publish", "activate":
+			/* not used in Go (yet) */
+		}
+	}
+	return p, nil
+}
+
+// parseKey reads a private key from r. It returns a map[string]string,
+// with the key-value pairs, or an error when the file is not correct.
+func parseKey(r io.Reader, file string) (map[string]string, error) {
+	s, cancel := scanInit(r)
+	m := make(map[string]string)
+	c := make(chan lex)
+	k := ""
+	defer func() {
+		cancel()
+		// zlexer can send up to two tokens, the next one and possibly 1 remainders.
+		// Do a non-blocking read.
+		_, ok := <-c
+		_, ok = <-c
+		if !ok {
+			// too bad
+		}
+	}()
+	// Start the lexer
+	go klexer(s, c)
+	for l := range c {
+		// It should alternate
+		switch l.value {
+		case zKey:
+			k = l.token
+		case zValue:
+			if k == "" {
+				return nil, &ParseError{file, "no private key seen", l}
+			}
+			//println("Setting", strings.ToLower(k), "to", l.token, "b")
+			m[strings.ToLower(k)] = l.token
+			k = ""
+		}
+	}
+	return m, nil
+}
+
+// klexer scans the sourcefile and returns tokens on the channel c.
+func klexer(s *scan, c chan lex) {
+	var l lex
+	str := "" // Hold the current read text
+	commt := false
+	key := true
+	x, err := s.tokenText()
+	defer close(c)
+	for err == nil {
+		l.column = s.position.Column
+		l.line = s.position.Line
+		switch x {
+		case ':':
+			if commt {
+				break
+			}
+			l.token = str
+			if key {
+				l.value = zKey
+				c <- l
+				// Next token is a space, eat it
+				s.tokenText()
+				key = false
+				str = ""
+			} else {
+				l.value = zValue
+			}
+		case ';':
+			commt = true
+		case '\n':
+			if commt {
+				// Reset a comment
+				commt = false
+			}
+			l.value = zValue
+			l.token = str
+			c <- l
+			str = ""
+			commt = false
+			key = true
+		default:
+			if commt {
+				break
+			}
+			str += string(x)
+		}
+		x, err = s.tokenText()
+	}
+	if len(str) > 0 {
+		// Send remainder
+		l.token = str
+		l.value = zValue
+		c <- l
+	}
+}
diff --git a/vendor/github.com/miekg/dns/dnssec_privkey.go b/vendor/github.com/miekg/dns/dnssec_privkey.go
new file mode 100644
index 0000000..46f3215
--- /dev/null
+++ b/vendor/github.com/miekg/dns/dnssec_privkey.go
@@ -0,0 +1,93 @@
+package dns
+
+import (
+	"crypto"
+	"crypto/dsa"
+	"crypto/ecdsa"
+	"crypto/rsa"
+	"math/big"
+	"strconv"
+
+	"golang.org/x/crypto/ed25519"
+)
+
+const format = "Private-key-format: v1.3\n"
+
+// PrivateKeyString converts a PrivateKey to a string. This string has the same
+// format as the private-key-file of BIND9 (Private-key-format: v1.3).
+// It needs some info from the key (the algorithm), so its a method of the DNSKEY
+// It supports rsa.PrivateKey, ecdsa.PrivateKey and dsa.PrivateKey
+func (r *DNSKEY) PrivateKeyString(p crypto.PrivateKey) string {
+	algorithm := strconv.Itoa(int(r.Algorithm))
+	algorithm += " (" + AlgorithmToString[r.Algorithm] + ")"
+
+	switch p := p.(type) {
+	case *rsa.PrivateKey:
+		modulus := toBase64(p.PublicKey.N.Bytes())
+		e := big.NewInt(int64(p.PublicKey.E))
+		publicExponent := toBase64(e.Bytes())
+		privateExponent := toBase64(p.D.Bytes())
+		prime1 := toBase64(p.Primes[0].Bytes())
+		prime2 := toBase64(p.Primes[1].Bytes())
+		// Calculate Exponent1/2 and Coefficient as per: http://en.wikipedia.org/wiki/RSA#Using_the_Chinese_remainder_algorithm
+		// and from: http://code.google.com/p/go/issues/detail?id=987
+		one := big.NewInt(1)
+		p1 := big.NewInt(0).Sub(p.Primes[0], one)
+		q1 := big.NewInt(0).Sub(p.Primes[1], one)
+		exp1 := big.NewInt(0).Mod(p.D, p1)
+		exp2 := big.NewInt(0).Mod(p.D, q1)
+		coeff := big.NewInt(0).ModInverse(p.Primes[1], p.Primes[0])
+
+		exponent1 := toBase64(exp1.Bytes())
+		exponent2 := toBase64(exp2.Bytes())
+		coefficient := toBase64(coeff.Bytes())
+
+		return format +
+			"Algorithm: " + algorithm + "\n" +
+			"Modulus: " + modulus + "\n" +
+			"PublicExponent: " + publicExponent + "\n" +
+			"PrivateExponent: " + privateExponent + "\n" +
+			"Prime1: " + prime1 + "\n" +
+			"Prime2: " + prime2 + "\n" +
+			"Exponent1: " + exponent1 + "\n" +
+			"Exponent2: " + exponent2 + "\n" +
+			"Coefficient: " + coefficient + "\n"
+
+	case *ecdsa.PrivateKey:
+		var intlen int
+		switch r.Algorithm {
+		case ECDSAP256SHA256:
+			intlen = 32
+		case ECDSAP384SHA384:
+			intlen = 48
+		}
+		private := toBase64(intToBytes(p.D, intlen))
+		return format +
+			"Algorithm: " + algorithm + "\n" +
+			"PrivateKey: " + private + "\n"
+
+	case *dsa.PrivateKey:
+		T := divRoundUp(divRoundUp(p.PublicKey.Parameters.G.BitLen(), 8)-64, 8)
+		prime := toBase64(intToBytes(p.PublicKey.Parameters.P, 64+T*8))
+		subprime := toBase64(intToBytes(p.PublicKey.Parameters.Q, 20))
+		base := toBase64(intToBytes(p.PublicKey.Parameters.G, 64+T*8))
+		priv := toBase64(intToBytes(p.X, 20))
+		pub := toBase64(intToBytes(p.PublicKey.Y, 64+T*8))
+		return format +
+			"Algorithm: " + algorithm + "\n" +
+			"Prime(p): " + prime + "\n" +
+			"Subprime(q): " + subprime + "\n" +
+			"Base(g): " + base + "\n" +
+			"Private_value(x): " + priv + "\n" +
+			"Public_value(y): " + pub + "\n"
+
+	case ed25519.PrivateKey:
+		private := toBase64(p[:32])
+		return format +
+			"Algorithm: " + algorithm + "\n" +
+			"PrivateKey: " + private + "\n"
+
+	default:
+		return ""
+	}
+}
diff --git a/vendor/github.com/miekg/dns/doc.go b/vendor/github.com/miekg/dns/doc.go
new file mode 100644
index 0000000..1d81147
--- /dev/null
+++ b/vendor/github.com/miekg/dns/doc.go
@@ -0,0 +1,272 @@
+/*
+Package dns implements a full featured interface to the Domain Name System.
+Server- and client-side programming is supported.
+The package allows complete control over what is sent out to the DNS. The package
+API follows the less-is-more principle, by presenting a small, clean interface.
+
+The package dns supports (asynchronous) querying/replying, incoming/outgoing zone transfers,
+TSIG, EDNS0, dynamic updates, notifies and DNSSEC validation/signing.
+Note that domain names MUST be fully qualified, before sending them, unqualified
+names in a message will result in a packing failure.
+
+Resource records are native types. They are not stored in wire format.
+Basic usage pattern for creating a new resource record:
+
+     r := new(dns.MX)
+     r.Hdr = dns.RR_Header{Name: "miek.nl.", Rrtype: dns.TypeMX,
+     Class: dns.ClassINET, Ttl: 3600}
+     r.Preference = 10
+     r.Mx = "mx.miek.nl."
+
+Or directly from a string:
+
+     mx, err := dns.NewRR("miek.nl. 3600 IN MX 10 mx.miek.nl.")
+
+Or when the default origin (.) and TTL (3600) and class (IN) suit you:
+
+     mx, err := dns.NewRR("miek.nl MX 10 mx.miek.nl")
+
+Or even:
+
+     mx, err := dns.NewRR("$ORIGIN nl.\nmiek 1H IN MX 10 mx.miek")
+
+In the DNS messages are exchanged, these messages contain resource
+records (sets). Use pattern for creating a message:
+
+     m := new(dns.Msg)
+     m.SetQuestion("miek.nl.", dns.TypeMX)
+
+Or when not certain if the domain name is fully qualified:
+
+	m.SetQuestion(dns.Fqdn("miek.nl"), dns.TypeMX)
+
+The message m is now a message with the question section set to ask
+the MX records for the miek.nl. zone.
+
+The following is slightly more verbose, but more flexible:
+
+     m1 := new(dns.Msg)
+     m1.Id = dns.Id()
+     m1.RecursionDesired = true
+     m1.Question = make([]dns.Question, 1)
+     m1.Question[0] = dns.Question{"miek.nl.", dns.TypeMX, dns.ClassINET}
+
+After creating a message it can be sent.
+Basic use pattern for synchronous querying the DNS at a
+server configured on 127.0.0.1 and port 53:
+
+     c := new(dns.Client)
+     in, rtt, err := c.Exchange(m1, "127.0.0.1:53")
+
+Suppressing multiple outstanding queries (with the same question, type and
+class) is as easy as setting:
+
+	c.SingleInflight = true
+
+More advanced options are available using a net.Dialer and the corresponding API.
+For example it is possible to set a timeout, or to specify a source IP address
+and port to use for the connection:
+
+	c := new(dns.Client)
+	laddr := net.UDPAddr{
+		IP: net.ParseIP("[::1]"),
+		Port: 12345,
+		Zone: "",
+	}
+	d := net.Dialer{
+		Timeout: 200 * time.Millisecond,
+		LocalAddr: &laddr,
+	}
+	in, rtt, err := c.ExchangeWithDialer(&d, m1, "8.8.8.8:53")
+
+If these "advanced" features are not needed, a simple UDP query can be sent,
+with:
+
+	in, err := dns.Exchange(m1, "127.0.0.1:53")
+
+When this functions returns you will get dns message. A dns message consists
+out of four sections.
+The question section: in.Question, the answer section: in.Answer,
+the authority section: in.Ns and the additional section: in.Extra.
+
+Each of these sections (except the Question section) contain a []RR. Basic
+use pattern for accessing the rdata of a TXT RR as the first RR in
+the Answer section:
+
+	if t, ok := in.Answer[0].(*dns.TXT); ok {
+		// do something with t.Txt
+	}
+
+Domain Name and TXT Character String Representations
+
+Both domain names and TXT character strings are converted to presentation
+form both when unpacked and when converted to strings.
+
+For TXT character strings, tabs, carriage returns and line feeds will be
+converted to \t, \r and \n respectively. Back slashes and quotations marks
+will be escaped. Bytes below 32 and above 127 will be converted to \DDD
+form.
+
+For domain names, in addition to the above rules brackets, periods,
+spaces, semicolons and the at symbol are escaped.
+
+DNSSEC
+
+DNSSEC (DNS Security Extension) adds a layer of security to the DNS. It
+uses public key cryptography to sign resource records. The
+public keys are stored in DNSKEY records and the signatures in RRSIG records.
+
+Requesting DNSSEC information for a zone is done by adding the DO (DNSSEC OK) bit
+to a request.
+
+     m := new(dns.Msg)
+     m.SetEdns0(4096, true)
+
+Signature generation, signature verification and key generation are all supported.
+
+DYNAMIC UPDATES
+
+Dynamic updates reuses the DNS message format, but renames three of
+the sections. Question is Zone, Answer is Prerequisite, Authority is
+Update, only the Additional is not renamed. See RFC 2136 for the gory details.
+
+You can set a rather complex set of rules for the existence of absence of
+certain resource records or names in a zone to specify if resource records
+should be added or removed. The table from RFC 2136 supplemented with the Go
+DNS function shows which functions exist to specify the prerequisites.
+
+ 3.2.4 - Table Of Metavalues Used In Prerequisite Section
+
+  CLASS    TYPE     RDATA    Meaning                    Function
+  --------------------------------------------------------------
+  ANY      ANY      empty    Name is in use             dns.NameUsed
+  ANY      rrset    empty    RRset exists (value indep) dns.RRsetUsed
+  NONE     ANY      empty    Name is not in use         dns.NameNotUsed
+  NONE     rrset    empty    RRset does not exist       dns.RRsetNotUsed
+  zone     rrset    rr       RRset exists (value dep)   dns.Used
+
+The prerequisite section can also be left empty.
+If you have decided on the prerequisites you can tell what RRs should
+be added or deleted. The next table shows the options you have and
+what functions to call.
+
+ 3.4.2.6 - Table Of Metavalues Used In Update Section
+
+  CLASS    TYPE     RDATA    Meaning                     Function
+  ---------------------------------------------------------------
+  ANY      ANY      empty    Delete all RRsets from name dns.RemoveName
+  ANY      rrset    empty    Delete an RRset             dns.RemoveRRset
+  NONE     rrset    rr       Delete an RR from RRset     dns.Remove
+  zone     rrset    rr       Add to an RRset             dns.Insert
+
+TRANSACTION SIGNATURE
+
+An TSIG or transaction signature adds a HMAC TSIG record to each message sent.
+The supported algorithms include: HmacMD5, HmacSHA1, HmacSHA256 and HmacSHA512.
+
+Basic use pattern when querying with a TSIG name "axfr." (note that these key names
+must be fully qualified - as they are domain names) and the base64 secret
+"so6ZGir4GPAqINNh9U5c3A==":
+
+If an incoming message contains a TSIG record it MUST be the last record in
+the additional section (RFC2845 3.2).  This means that you should make the
+call to SetTsig last, right before executing the query.  If you make any
+changes to the RRset after calling SetTsig() the signature will be incorrect.
+
+	c := new(dns.Client)
+	c.TsigSecret = map[string]string{"axfr.": "so6ZGir4GPAqINNh9U5c3A=="}
+	m := new(dns.Msg)
+	m.SetQuestion("miek.nl.", dns.TypeMX)
+	m.SetTsig("axfr.", dns.HmacMD5, 300, time.Now().Unix())
+	...
+	// When sending the TSIG RR is calculated and filled in before sending
+
+When requesting an zone transfer (almost all TSIG usage is when requesting zone transfers), with
+TSIG, this is the basic use pattern. In this example we request an AXFR for
+miek.nl. with TSIG key named "axfr." and secret "so6ZGir4GPAqINNh9U5c3A=="
+and using the server 176.58.119.54:
+
+	t := new(dns.Transfer)
+	m := new(dns.Msg)
+	t.TsigSecret = map[string]string{"axfr.": "so6ZGir4GPAqINNh9U5c3A=="}
+	m.SetAxfr("miek.nl.")
+	m.SetTsig("axfr.", dns.HmacMD5, 300, time.Now().Unix())
+	c, err := t.In(m, "176.58.119.54:53")
+	for r := range c { ... }
+
+You can now read the records from the transfer as they come in. Each envelope is checked with TSIG.
+If something is not correct an error is returned.
+
+Basic use pattern validating and replying to a message that has TSIG set.
+
+	server := &dns.Server{Addr: ":53", Net: "udp"}
+	server.TsigSecret = map[string]string{"axfr.": "so6ZGir4GPAqINNh9U5c3A=="}
+	go server.ListenAndServe()
+	dns.HandleFunc(".", handleRequest)
+
+	func handleRequest(w dns.ResponseWriter, r *dns.Msg) {
+		m := new(dns.Msg)
+		m.SetReply(r)
+		if r.IsTsig() != nil {
+			if w.TsigStatus() == nil {
+				// *Msg r has an TSIG record and it was validated
+				m.SetTsig("axfr.", dns.HmacMD5, 300, time.Now().Unix())
+			} else {
+				// *Msg r has an TSIG records and it was not valided
+			}
+		}
+		w.WriteMsg(m)
+	}
+
+PRIVATE RRS
+
+RFC 6895 sets aside a range of type codes for private use. This range
+is 65,280 - 65,534 (0xFF00 - 0xFFFE). When experimenting with new Resource Records these
+can be used, before requesting an official type code from IANA.
+
+see http://miek.nl/2014/September/21/idn-and-private-rr-in-go-dns/ for more
+information.
+
+EDNS0
+
+EDNS0 is an extension mechanism for the DNS defined in RFC 2671 and updated
+by RFC 6891. It defines an new RR type, the OPT RR, which is then completely
+abused.
+Basic use pattern for creating an (empty) OPT RR:
+
+	o := new(dns.OPT)
+	o.Hdr.Name = "." // MUST be the root zone, per definition.
+	o.Hdr.Rrtype = dns.TypeOPT
+
+The rdata of an OPT RR consists out of a slice of EDNS0 (RFC 6891)
+interfaces. Currently only a few have been standardized: EDNS0_NSID
+(RFC 5001) and EDNS0_SUBNET (draft-vandergaast-edns-client-subnet-02). Note
+that these options may be combined in an OPT RR.
+Basic use pattern for a server to check if (and which) options are set:
+
+	// o is a dns.OPT
+	for _, s := range o.Option {
+		switch e := s.(type) {
+		case *dns.EDNS0_NSID:
+			// do stuff with e.Nsid
+		case *dns.EDNS0_SUBNET:
+			// access e.Family, e.Address, etc.
+		}
+	}
+
+SIG(0)
+
+From RFC 2931:
+
+    SIG(0) provides protection for DNS transactions and requests ....
+    ... protection for glue records, DNS requests, protection for message headers
+    on requests and responses, and protection of the overall integrity of a response.
+
+It works like TSIG, except that SIG(0) uses public key cryptography, instead of the shared
+secret approach in TSIG.
+Supported algorithms: DSA, ECDSAP256SHA256, ECDSAP384SHA384, RSASHA1, RSASHA256 and
+RSASHA512.
+
+Signing subsequent messages in multi-message sessions is not implemented.
+*/
+package dns
diff --git a/vendor/github.com/miekg/dns/edns.go b/vendor/github.com/miekg/dns/edns.go
new file mode 100644
index 0000000..6f9d2ea
--- /dev/null
+++ b/vendor/github.com/miekg/dns/edns.go
@@ -0,0 +1,627 @@
+package dns
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"net"
+	"strconv"
+)
+
+// EDNS0 Option codes.
+const (
+	EDNS0LLQ          = 0x1     // long lived queries: http://tools.ietf.org/html/draft-sekar-dns-llq-01
+	EDNS0UL           = 0x2     // update lease draft: http://files.dns-sd.org/draft-sekar-dns-ul.txt
+	EDNS0NSID         = 0x3     // nsid (See RFC 5001)
+	EDNS0DAU          = 0x5     // DNSSEC Algorithm Understood
+	EDNS0DHU          = 0x6     // DS Hash Understood
+	EDNS0N3U          = 0x7     // NSEC3 Hash Understood
+	EDNS0SUBNET       = 0x8     // client-subnet (See RFC 7871)
+	EDNS0EXPIRE       = 0x9     // EDNS0 expire
+	EDNS0COOKIE       = 0xa     // EDNS0 Cookie
+	EDNS0TCPKEEPALIVE = 0xb     // EDNS0 tcp keep alive (See RFC 7828)
+	EDNS0PADDING      = 0xc     // EDNS0 padding (See RFC 7830)
+	EDNS0LOCALSTART   = 0xFDE9  // Beginning of range reserved for local/experimental use (See RFC 6891)
+	EDNS0LOCALEND     = 0xFFFE  // End of range reserved for local/experimental use (See RFC 6891)
+	_DO               = 1 << 15 // DNSSEC OK
+)
+
+// OPT is the EDNS0 RR appended to messages to convey extra (meta) information.
+// See RFC 6891.
+type OPT struct {
+	Hdr    RR_Header
+	Option []EDNS0 `dns:"opt"`
+}
+
+func (rr *OPT) String() string {
+	s := "\n;; OPT PSEUDOSECTION:\n; EDNS: version " + strconv.Itoa(int(rr.Version())) + "; "
+	if rr.Do() {
+		s += "flags: do; "
+	} else {
+		s += "flags: ; "
+	}
+	s += "udp: " + strconv.Itoa(int(rr.UDPSize()))
+
+	for _, o := range rr.Option {
+		switch o.(type) {
+		case *EDNS0_NSID:
+			s += "\n; NSID: " + o.String()
+			h, e := o.pack()
+			var r string
+			if e == nil {
+				for _, c := range h {
+					r += "(" + string(c) + ")"
+				}
+				s += "  " + r
+			}
+		case *EDNS0_SUBNET:
+			s += "\n; SUBNET: " + o.String()
+		case *EDNS0_COOKIE:
+			s += "\n; COOKIE: " + o.String()
+		case *EDNS0_UL:
+			s += "\n; UPDATE LEASE: " + o.String()
+		case *EDNS0_LLQ:
+			s += "\n; LONG LIVED QUERIES: " + o.String()
+		case *EDNS0_DAU:
+			s += "\n; DNSSEC ALGORITHM UNDERSTOOD: " + o.String()
+		case *EDNS0_DHU:
+			s += "\n; DS HASH UNDERSTOOD: " + o.String()
+		case *EDNS0_N3U:
+			s += "\n; NSEC3 HASH UNDERSTOOD: " + o.String()
+		case *EDNS0_LOCAL:
+			s += "\n; LOCAL OPT: " + o.String()
+		case *EDNS0_PADDING:
+			s += "\n; PADDING: " + o.String()
+		}
+	}
+	return s
+}
+
+func (rr *OPT) len() int {
+	l := rr.Hdr.len()
+	for i := 0; i < len(rr.Option); i++ {
+		l += 4 // Account for 2-byte option code and 2-byte option length.
+		lo, _ := rr.Option[i].pack()
+		l += len(lo)
+	}
+	return l
+}
+
+// return the old value -> delete SetVersion?
+
+// Version returns the EDNS version used. Only zero is defined.
+func (rr *OPT) Version() uint8 {
+	return uint8((rr.Hdr.Ttl & 0x00FF0000) >> 16)
+}
+
+// SetVersion sets the version of EDNS. This is usually zero.
+func (rr *OPT) SetVersion(v uint8) {
+	rr.Hdr.Ttl = rr.Hdr.Ttl&0xFF00FFFF | (uint32(v) << 16)
+}
+
+// ExtendedRcode returns the EDNS extended RCODE field (the upper 8 bits of the TTL).
+func (rr *OPT) ExtendedRcode() int {
+	return int((rr.Hdr.Ttl & 0xFF000000) >> 24)
+}
+
+// SetExtendedRcode sets the EDNS extended RCODE field.
+func (rr *OPT) SetExtendedRcode(v uint8) {
+	rr.Hdr.Ttl = rr.Hdr.Ttl&0x00FFFFFF | (uint32(v) << 24)
+}
+
+// UDPSize returns the UDP buffer size.
+func (rr *OPT) UDPSize() uint16 {
+	return rr.Hdr.Class
+}
+
+// SetUDPSize sets the UDP buffer size.
+func (rr *OPT) SetUDPSize(size uint16) {
+	rr.Hdr.Class = size
+}
+
+// Do returns the value of the DO (DNSSEC OK) bit.
+func (rr *OPT) Do() bool {
+	return rr.Hdr.Ttl&_DO == _DO
+}
+
+// SetDo sets the DO (DNSSEC OK) bit.
+// If we pass an argument, set the DO bit to that value.
+// It is possible to pass 2 or more arguments. Any arguments after the 1st is silently ignored.
+func (rr *OPT) SetDo(do ...bool) {
+	if len(do) == 1 {
+		if do[0] {
+			rr.Hdr.Ttl |= _DO
+		} else {
+			rr.Hdr.Ttl &^= _DO
+		}
+	} else {
+		rr.Hdr.Ttl |= _DO
+	}
+}
+
+// EDNS0 defines an EDNS0 Option. An OPT RR can have multiple options appended to it.
+type EDNS0 interface {
+	// Option returns the option code for the option.
+	Option() uint16
+	// pack returns the bytes of the option data.
+	pack() ([]byte, error)
+	// unpack sets the data as found in the buffer. Is also sets
+	// the length of the slice as the length of the option data.
+	unpack([]byte) error
+	// String returns the string representation of the option.
+	String() string
+}
+
+// EDNS0_NSID option is used to retrieve a nameserver
+// identifier. When sending a request Nsid must be set to the empty string
+// The identifier is an opaque string encoded as hex.
+// Basic use pattern for creating an nsid option:
+//
+//	o := new(dns.OPT)
+//	o.Hdr.Name = "."
+//	o.Hdr.Rrtype = dns.TypeOPT
+//	e := new(dns.EDNS0_NSID)
+//	e.Code = dns.EDNS0NSID
+//	e.Nsid = "AA"
+//	o.Option = append(o.Option, e)
+type EDNS0_NSID struct {
+	Code uint16 // Always EDNS0NSID
+	Nsid string // This string needs to be hex encoded
+}
+
+func (e *EDNS0_NSID) pack() ([]byte, error) {
+	h, err := hex.DecodeString(e.Nsid)
+	if err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_NSID) Option() uint16        { return EDNS0NSID } // Option returns the option code.
+func (e *EDNS0_NSID) unpack(b []byte) error { e.Nsid = hex.EncodeToString(b); return nil }
+func (e *EDNS0_NSID) String() string        { return string(e.Nsid) }
+
+// EDNS0_SUBNET is the subnet option that is used to give the remote nameserver
+// an idea of where the client lives. See RFC 7871. It can then give back a different
+// answer depending on the location or network topology.
+// Basic use pattern for creating an subnet option:
+//
+//	o := new(dns.OPT)
+//	o.Hdr.Name = "."
+//	o.Hdr.Rrtype = dns.TypeOPT
+//	e := new(dns.EDNS0_SUBNET)
+//	e.Code = dns.EDNS0SUBNET
+//	e.Family = 1	// 1 for IPv4 source address, 2 for IPv6
+//	e.SourceNetmask = 32	// 32 for IPV4, 128 for IPv6
+//	e.SourceScope = 0
+//	e.Address = net.ParseIP("127.0.0.1").To4()	// for IPv4
+//	// e.Address = net.ParseIP("2001:7b8:32a::2")	// for IPV6
+//	o.Option = append(o.Option, e)
+//
+// This code will parse all the available bits when unpacking (up to optlen).
+// When packing it will apply SourceNetmask. If you need more advanced logic,
+// patches welcome and good luck.
+type EDNS0_SUBNET struct {
+	Code          uint16 // Always EDNS0SUBNET
+	Family        uint16 // 1 for IP, 2 for IP6
+	SourceNetmask uint8
+	SourceScope   uint8
+	Address       net.IP
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_SUBNET) Option() uint16 { return EDNS0SUBNET }
+
+func (e *EDNS0_SUBNET) pack() ([]byte, error) {
+	b := make([]byte, 4)
+	binary.BigEndian.PutUint16(b[0:], e.Family)
+	b[2] = e.SourceNetmask
+	b[3] = e.SourceScope
+	switch e.Family {
+	case 0:
+		// "dig" sets AddressFamily to 0 if SourceNetmask is also 0
+		// We might don't need to complain either
+		if e.SourceNetmask != 0 {
+			return nil, errors.New("dns: bad address family")
+		}
+	case 1:
+		if e.SourceNetmask > net.IPv4len*8 {
+			return nil, errors.New("dns: bad netmask")
+		}
+		if len(e.Address.To4()) != net.IPv4len {
+			return nil, errors.New("dns: bad address")
+		}
+		ip := e.Address.To4().Mask(net.CIDRMask(int(e.SourceNetmask), net.IPv4len*8))
+		needLength := (e.SourceNetmask + 8 - 1) / 8 // division rounding up
+		b = append(b, ip[:needLength]...)
+	case 2:
+		if e.SourceNetmask > net.IPv6len*8 {
+			return nil, errors.New("dns: bad netmask")
+		}
+		if len(e.Address) != net.IPv6len {
+			return nil, errors.New("dns: bad address")
+		}
+		ip := e.Address.Mask(net.CIDRMask(int(e.SourceNetmask), net.IPv6len*8))
+		needLength := (e.SourceNetmask + 8 - 1) / 8 // division rounding up
+		b = append(b, ip[:needLength]...)
+	default:
+		return nil, errors.New("dns: bad address family")
+	}
+	return b, nil
+}
+
+func (e *EDNS0_SUBNET) unpack(b []byte) error {
+	if len(b) < 4 {
+		return ErrBuf
+	}
+	e.Family = binary.BigEndian.Uint16(b)
+	e.SourceNetmask = b[2]
+	e.SourceScope = b[3]
+	switch e.Family {
+	case 0:
+		// "dig" sets AddressFamily to 0 if SourceNetmask is also 0
+		// It's okay to accept such a packet
+		if e.SourceNetmask != 0 {
+			return errors.New("dns: bad address family")
+		}
+		e.Address = net.IPv4(0, 0, 0, 0)
+	case 1:
+		if e.SourceNetmask > net.IPv4len*8 || e.SourceScope > net.IPv4len*8 {
+			return errors.New("dns: bad netmask")
+		}
+		addr := make([]byte, net.IPv4len)
+		for i := 0; i < net.IPv4len && 4+i < len(b); i++ {
+			addr[i] = b[4+i]
+		}
+		e.Address = net.IPv4(addr[0], addr[1], addr[2], addr[3])
+	case 2:
+		if e.SourceNetmask > net.IPv6len*8 || e.SourceScope > net.IPv6len*8 {
+			return errors.New("dns: bad netmask")
+		}
+		addr := make([]byte, net.IPv6len)
+		for i := 0; i < net.IPv6len && 4+i < len(b); i++ {
+			addr[i] = b[4+i]
+		}
+		e.Address = net.IP{addr[0], addr[1], addr[2], addr[3], addr[4],
+			addr[5], addr[6], addr[7], addr[8], addr[9], addr[10],
+			addr[11], addr[12], addr[13], addr[14], addr[15]}
+	default:
+		return errors.New("dns: bad address family")
+	}
+	return nil
+}
+
+func (e *EDNS0_SUBNET) String() (s string) {
+	if e.Address == nil {
+		s = "<nil>"
+	} else if e.Address.To4() != nil {
+		s = e.Address.String()
+	} else {
+		s = "[" + e.Address.String() + "]"
+	}
+	s += "/" + strconv.Itoa(int(e.SourceNetmask)) + "/" + strconv.Itoa(int(e.SourceScope))
+	return
+}
+
+// The EDNS0_COOKIE option is used to add a DNS Cookie to a message.
+//
+//	o := new(dns.OPT)
+//	o.Hdr.Name = "."
+//	o.Hdr.Rrtype = dns.TypeOPT
+//	e := new(dns.EDNS0_COOKIE)
+//	e.Code = dns.EDNS0COOKIE
+//	e.Cookie = "24a5ac.."
+//	o.Option = append(o.Option, e)
+//
+// The Cookie field consists out of a client cookie (RFC 7873 Section 4), that is
+// always 8 bytes. It may then optionally be followed by the server cookie. The server
+// cookie is of variable length, 8 to a maximum of 32 bytes. In other words:
+//
+//	cCookie := o.Cookie[:16]
+//	sCookie := o.Cookie[16:]
+//
+// There is no guarantee that the Cookie string has a specific length.
+type EDNS0_COOKIE struct {
+	Code   uint16 // Always EDNS0COOKIE
+	Cookie string // Hex-encoded cookie data
+}
+
+func (e *EDNS0_COOKIE) pack() ([]byte, error) {
+	h, err := hex.DecodeString(e.Cookie)
+	if err != nil {
+		return nil, err
+	}
+	return h, nil
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_COOKIE) Option() uint16        { return EDNS0COOKIE }
+func (e *EDNS0_COOKIE) unpack(b []byte) error { e.Cookie = hex.EncodeToString(b); return nil }
+func (e *EDNS0_COOKIE) String() string        { return e.Cookie }
+
+// The EDNS0_UL (Update Lease) (draft RFC) option is used to tell the server to set
+// an expiration on an update RR. This is helpful for clients that cannot clean
+// up after themselves. This is a draft RFC and more information can be found at
+// http://files.dns-sd.org/draft-sekar-dns-ul.txt
+//
+//	o := new(dns.OPT)
+//	o.Hdr.Name = "."
+//	o.Hdr.Rrtype = dns.TypeOPT
+//	e := new(dns.EDNS0_UL)
+//	e.Code = dns.EDNS0UL
+//	e.Lease = 120 // in seconds
+//	o.Option = append(o.Option, e)
+type EDNS0_UL struct {
+	Code  uint16 // Always EDNS0UL
+	Lease uint32
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_UL) Option() uint16 { return EDNS0UL }
+func (e *EDNS0_UL) String() string { return strconv.FormatUint(uint64(e.Lease), 10) }
+
+// Copied: http://golang.org/src/pkg/net/dnsmsg.go
+func (e *EDNS0_UL) pack() ([]byte, error) {
+	b := make([]byte, 4)
+	binary.BigEndian.PutUint32(b, e.Lease)
+	return b, nil
+}
+
+func (e *EDNS0_UL) unpack(b []byte) error {
+	if len(b) < 4 {
+		return ErrBuf
+	}
+	e.Lease = binary.BigEndian.Uint32(b)
+	return nil
+}
+
+// EDNS0_LLQ stands for Long Lived Queries: http://tools.ietf.org/html/draft-sekar-dns-llq-01
+// Implemented for completeness, as the EDNS0 type code is assigned.
+type EDNS0_LLQ struct {
+	Code      uint16 // Always EDNS0LLQ
+	Version   uint16
+	Opcode    uint16
+	Error     uint16
+	Id        uint64
+	LeaseLife uint32
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_LLQ) Option() uint16 { return EDNS0LLQ }
+
+func (e *EDNS0_LLQ) pack() ([]byte, error) {
+	b := make([]byte, 18)
+	binary.BigEndian.PutUint16(b[0:], e.Version)
+	binary.BigEndian.PutUint16(b[2:], e.Opcode)
+	binary.BigEndian.PutUint16(b[4:], e.Error)
+	binary.BigEndian.PutUint64(b[6:], e.Id)
+	binary.BigEndian.PutUint32(b[14:], e.LeaseLife)
+	return b, nil
+}
+
+func (e *EDNS0_LLQ) unpack(b []byte) error {
+	if len(b) < 18 {
+		return ErrBuf
+	}
+	e.Version = binary.BigEndian.Uint16(b[0:])
+	e.Opcode = binary.BigEndian.Uint16(b[2:])
+	e.Error = binary.BigEndian.Uint16(b[4:])
+	e.Id = binary.BigEndian.Uint64(b[6:])
+	e.LeaseLife = binary.BigEndian.Uint32(b[14:])
+	return nil
+}
+
+func (e *EDNS0_LLQ) String() string {
+	s := strconv.FormatUint(uint64(e.Version), 10) + " " + strconv.FormatUint(uint64(e.Opcode), 10) +
+		" " + strconv.FormatUint(uint64(e.Error), 10) + " " + strconv.FormatUint(uint64(e.Id), 10) +
+		" " + strconv.FormatUint(uint64(e.LeaseLife), 10)
+	return s
+}
+
+// EDNS0_DUA implements the EDNS0 "DNSSEC Algorithm Understood" option. See RFC 6975.
+type EDNS0_DAU struct {
+	Code    uint16 // Always EDNS0DAU
+	AlgCode []uint8
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_DAU) Option() uint16        { return EDNS0DAU }
+func (e *EDNS0_DAU) pack() ([]byte, error) { return e.AlgCode, nil }
+func (e *EDNS0_DAU) unpack(b []byte) error { e.AlgCode = b; return nil }
+
+func (e *EDNS0_DAU) String() string {
+	s := ""
+	for i := 0; i < len(e.AlgCode); i++ {
+		if a, ok := AlgorithmToString[e.AlgCode[i]]; ok {
+			s += " " + a
+		} else {
+			s += " " + strconv.Itoa(int(e.AlgCode[i]))
+		}
+	}
+	return s
+}
+
+// EDNS0_DHU implements the EDNS0 "DS Hash Understood" option. See RFC 6975.
+type EDNS0_DHU struct {
+	Code    uint16 // Always EDNS0DHU
+	AlgCode []uint8
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_DHU) Option() uint16        { return EDNS0DHU }
+func (e *EDNS0_DHU) pack() ([]byte, error) { return e.AlgCode, nil }
+func (e *EDNS0_DHU) unpack(b []byte) error { e.AlgCode = b; return nil }
+
+func (e *EDNS0_DHU) String() string {
+	s := ""
+	for i := 0; i < len(e.AlgCode); i++ {
+		if a, ok := HashToString[e.AlgCode[i]]; ok {
+			s += " " + a
+		} else {
+			s += " " + strconv.Itoa(int(e.AlgCode[i]))
+		}
+	}
+	return s
+}
+
+// EDNS0_N3U implements the EDNS0 "NSEC3 Hash Understood" option. See RFC 6975.
+type EDNS0_N3U struct {
+	Code    uint16 // Always EDNS0N3U
+	AlgCode []uint8
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_N3U) Option() uint16        { return EDNS0N3U }
+func (e *EDNS0_N3U) pack() ([]byte, error) { return e.AlgCode, nil }
+func (e *EDNS0_N3U) unpack(b []byte) error { e.AlgCode = b; return nil }
+
+func (e *EDNS0_N3U) String() string {
+	// Re-use the hash map
+	s := ""
+	for i := 0; i < len(e.AlgCode); i++ {
+		if a, ok := HashToString[e.AlgCode[i]]; ok {
+			s += " " + a
+		} else {
+			s += " " + strconv.Itoa(int(e.AlgCode[i]))
+		}
+	}
+	return s
+}
+
+// EDNS0_EXPIRE implementes the EDNS0 option as described in RFC 7314.
+type EDNS0_EXPIRE struct {
+	Code   uint16 // Always EDNS0EXPIRE
+	Expire uint32
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_EXPIRE) Option() uint16 { return EDNS0EXPIRE }
+func (e *EDNS0_EXPIRE) String() string { return strconv.FormatUint(uint64(e.Expire), 10) }
+
+func (e *EDNS0_EXPIRE) pack() ([]byte, error) {
+	b := make([]byte, 4)
+	b[0] = byte(e.Expire >> 24)
+	b[1] = byte(e.Expire >> 16)
+	b[2] = byte(e.Expire >> 8)
+	b[3] = byte(e.Expire)
+	return b, nil
+}
+
+func (e *EDNS0_EXPIRE) unpack(b []byte) error {
+	if len(b) < 4 {
+		return ErrBuf
+	}
+	e.Expire = binary.BigEndian.Uint32(b)
+	return nil
+}
+
+// The EDNS0_LOCAL option is used for local/experimental purposes. The option
+// code is recommended to be within the range [EDNS0LOCALSTART, EDNS0LOCALEND]
+// (RFC6891), although any unassigned code can actually be used.  The content of
+// the option is made available in Data, unaltered.
+// Basic use pattern for creating a local option:
+//
+//	o := new(dns.OPT)
+//	o.Hdr.Name = "."
+//	o.Hdr.Rrtype = dns.TypeOPT
+//	e := new(dns.EDNS0_LOCAL)
+//	e.Code = dns.EDNS0LOCALSTART
+//	e.Data = []byte{72, 82, 74}
+//	o.Option = append(o.Option, e)
+type EDNS0_LOCAL struct {
+	Code uint16
+	Data []byte
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_LOCAL) Option() uint16 { return e.Code }
+func (e *EDNS0_LOCAL) String() string {
+	return strconv.FormatInt(int64(e.Code), 10) + ":0x" + hex.EncodeToString(e.Data)
+}
+
+func (e *EDNS0_LOCAL) pack() ([]byte, error) {
+	b := make([]byte, len(e.Data))
+	copied := copy(b, e.Data)
+	if copied != len(e.Data) {
+		return nil, ErrBuf
+	}
+	return b, nil
+}
+
+func (e *EDNS0_LOCAL) unpack(b []byte) error {
+	e.Data = make([]byte, len(b))
+	copied := copy(e.Data, b)
+	if copied != len(b) {
+		return ErrBuf
+	}
+	return nil
+}
+
+// EDNS0_TCP_KEEPALIVE is an EDNS0 option that instructs the server to keep
+// the TCP connection alive. See RFC 7828.
+type EDNS0_TCP_KEEPALIVE struct {
+	Code    uint16 // Always EDNSTCPKEEPALIVE
+	Length  uint16 // the value 0 if the TIMEOUT is omitted, the value 2 if it is present;
+	Timeout uint16 // an idle timeout value for the TCP connection, specified in units of 100 milliseconds, encoded in network byte order.
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_TCP_KEEPALIVE) Option() uint16 { return EDNS0TCPKEEPALIVE }
+
+func (e *EDNS0_TCP_KEEPALIVE) pack() ([]byte, error) {
+	if e.Timeout != 0 && e.Length != 2 {
+		return nil, errors.New("dns: timeout specified but length is not 2")
+	}
+	if e.Timeout == 0 && e.Length != 0 {
+		return nil, errors.New("dns: timeout not specified but length is not 0")
+	}
+	b := make([]byte, 4+e.Length)
+	binary.BigEndian.PutUint16(b[0:], e.Code)
+	binary.BigEndian.PutUint16(b[2:], e.Length)
+	if e.Length == 2 {
+		binary.BigEndian.PutUint16(b[4:], e.Timeout)
+	}
+	return b, nil
+}
+
+func (e *EDNS0_TCP_KEEPALIVE) unpack(b []byte) error {
+	if len(b) < 4 {
+		return ErrBuf
+	}
+	e.Length = binary.BigEndian.Uint16(b[2:4])
+	if e.Length != 0 && e.Length != 2 {
+		return errors.New("dns: length mismatch, want 0/2 but got " + strconv.FormatUint(uint64(e.Length), 10))
+	}
+	if e.Length == 2 {
+		if len(b) < 6 {
+			return ErrBuf
+		}
+		e.Timeout = binary.BigEndian.Uint16(b[4:6])
+	}
+	return nil
+}
+
+func (e *EDNS0_TCP_KEEPALIVE) String() (s string) {
+	s = "use tcp keep-alive"
+	if e.Length == 0 {
+		s += ", timeout omitted"
+	} else {
+		s += fmt.Sprintf(", timeout %dms", e.Timeout*100)
+	}
+	return
+}
+
+// EDNS0_PADDING option is used to add padding to a request/response. The default
+// value of padding SHOULD be 0x0 but other values MAY be used, for instance if
+// compression is applied before encryption which may break signatures.
+type EDNS0_PADDING struct {
+	Padding []byte
+}
+
+// Option implements the EDNS0 interface.
+func (e *EDNS0_PADDING) Option() uint16        { return EDNS0PADDING }
+func (e *EDNS0_PADDING) pack() ([]byte, error) { return e.Padding, nil }
+func (e *EDNS0_PADDING) unpack(b []byte) error { e.Padding = b; return nil }
+func (e *EDNS0_PADDING) String() string        { return fmt.Sprintf("%0X", e.Padding) }
diff --git a/vendor/github.com/miekg/dns/format.go b/vendor/github.com/miekg/dns/format.go
new file mode 100644
index 0000000..3f5303c
--- /dev/null
+++ b/vendor/github.com/miekg/dns/format.go
@@ -0,0 +1,87 @@
+package dns
+
+import (
+	"net"
+	"reflect"
+	"strconv"
+)
+
+// NumField returns the number of rdata fields r has.
+func NumField(r RR) int {
+	return reflect.ValueOf(r).Elem().NumField() - 1 // Remove RR_Header
+}
+
+// Field returns the rdata field i as a string. Fields are indexed starting from 1.
+// RR types that holds slice data, for instance the NSEC type bitmap will return a single
+// string where the types are concatenated using a space.
+// Accessing non existing fields will cause a panic.
+func Field(r RR, i int) string {
+	if i == 0 {
+		return ""
+	}
+	d := reflect.ValueOf(r).Elem().Field(i)
+	switch k := d.Kind(); k {
+	case reflect.String:
+		return d.String()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return strconv.FormatInt(d.Int(), 10)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return strconv.FormatUint(d.Uint(), 10)
+	case reflect.Slice:
+		switch reflect.ValueOf(r).Elem().Type().Field(i).Tag {
+		case `dns:"a"`:
+			// TODO(miek): Hmm store this as 16 bytes
+			if d.Len() < net.IPv6len {
+				return net.IPv4(byte(d.Index(0).Uint()),
+					byte(d.Index(1).Uint()),
+					byte(d.Index(2).Uint()),
+					byte(d.Index(3).Uint())).String()
+			}
+			return net.IPv4(byte(d.Index(12).Uint()),
+				byte(d.Index(13).Uint()),
+				byte(d.Index(14).Uint()),
+				byte(d.Index(15).Uint())).String()
+		case `dns:"aaaa"`:
+			return net.IP{
+				byte(d.Index(0).Uint()),
+				byte(d.Index(1).Uint()),
+				byte(d.Index(2).Uint()),
+				byte(d.Index(3).Uint()),
+				byte(d.Index(4).Uint()),
+				byte(d.Index(5).Uint()),
+				byte(d.Index(6).Uint()),
+				byte(d.Index(7).Uint()),
+				byte(d.Index(8).Uint()),
+				byte(d.Index(9).Uint()),
+				byte(d.Index(10).Uint()),
+				byte(d.Index(11).Uint()),
+				byte(d.Index(12).Uint()),
+				byte(d.Index(13).Uint()),
+				byte(d.Index(14).Uint()),
+				byte(d.Index(15).Uint()),
+			}.String()
+		case `dns:"nsec"`:
+			if d.Len() == 0 {
+				return ""
+			}
+			s := Type(d.Index(0).Uint()).String()
+			for i := 1; i < d.Len(); i++ {
+				s += " " + Type(d.Index(i).Uint()).String()
+			}
+			return s
+		default:
+			// if it does not have a tag its a string slice
+			fallthrough
+		case `dns:"txt"`:
+			if d.Len() == 0 {
+				return ""
+			}
+			s := d.Index(0).String()
+			for i := 1; i < d.Len(); i++ {
+				s += " " + d.Index(i).String()
+			}
+			return s
+		}
+	}
+	return ""
+}
diff --git a/vendor/github.com/miekg/dns/fuzz.go b/vendor/github.com/miekg/dns/fuzz.go
new file mode 100644
index 0000000..a8a0918
--- /dev/null
+++ b/vendor/github.com/miekg/dns/fuzz.go
@@ -0,0 +1,23 @@
+// +build fuzz
+
+package dns
+
+func Fuzz(data []byte) int {
+	msg := new(Msg)
+
+	if err := msg.Unpack(data); err != nil {
+		return 0
+	}
+	if _, err := msg.Pack(); err != nil {
+		return 0
+	}
+
+	return 1
+}
+
+func FuzzNewRR(data []byte) int {
+	if _, err := NewRR(string(data)); err != nil {
+		return 0
+	}
+	return 1
+}
diff --git a/vendor/github.com/miekg/dns/generate.go b/vendor/github.com/miekg/dns/generate.go
new file mode 100644
index 0000000..e4481a4
--- /dev/null
+++ b/vendor/github.com/miekg/dns/generate.go
@@ -0,0 +1,159 @@
+package dns
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Parse the $GENERATE statement as used in BIND9 zones.
+// See http://www.zytrax.com/books/dns/ch8/generate.html for instance.
+// We are called after '$GENERATE '. After which we expect:
+// * the range (12-24/2)
+// * lhs (ownername)
+// * [[ttl][class]]
+// * type
+// * rhs (rdata)
+// But we are lazy here, only the range is parsed *all* occurrences
+// of $ after that are interpreted.
+// Any error are returned as a string value, the empty string signals
+// "no error".
+func generate(l lex, c chan lex, t chan *Token, o string) string {
+	step := 1
+	if i := strings.IndexAny(l.token, "/"); i != -1 {
+		if i+1 == len(l.token) {
+			return "bad step in $GENERATE range"
+		}
+		if s, err := strconv.Atoi(l.token[i+1:]); err == nil {
+			if s < 0 {
+				return "bad step in $GENERATE range"
+			}
+			step = s
+		} else {
+			return "bad step in $GENERATE range"
+		}
+		l.token = l.token[:i]
+	}
+	sx := strings.SplitN(l.token, "-", 2)
+	if len(sx) != 2 {
+		return "bad start-stop in $GENERATE range"
+	}
+	start, err := strconv.Atoi(sx[0])
+	if err != nil {
+		return "bad start in $GENERATE range"
+	}
+	end, err := strconv.Atoi(sx[1])
+	if err != nil {
+		return "bad stop in $GENERATE range"
+	}
+	if end < 0 || start < 0 || end < start {
+		return "bad range in $GENERATE range"
+	}
+
+	<-c // _BLANK
+	// Create a complete new string, which we then parse again.
+	s := ""
+BuildRR:
+	l = <-c
+	if l.value != zNewline && l.value != zEOF {
+		s += l.token
+		goto BuildRR
+	}
+	for i := start; i <= end; i += step {
+		var (
+			escape bool
+			dom    bytes.Buffer
+			mod    string
+			err    error
+			offset int
+		)
+
+		for j := 0; j < len(s); j++ { // No 'range' because we need to jump around
+			switch s[j] {
+			case '\\':
+				if escape {
+					dom.WriteByte('\\')
+					escape = false
+					continue
+				}
+				escape = true
+			case '$':
+				mod = "%d"
+				offset = 0
+				if escape {
+					dom.WriteByte('$')
+					escape = false
+					continue
+				}
+				escape = false
+				if j+1 >= len(s) { // End of the string
+					dom.WriteString(fmt.Sprintf(mod, i+offset))
+					continue
+				} else {
+					if s[j+1] == '$' {
+						dom.WriteByte('$')
+						j++
+						continue
+					}
+				}
+				// Search for { and }
+				if s[j+1] == '{' { // Modifier block
+					sep := strings.Index(s[j+2:], "}")
+					if sep == -1 {
+						return "bad modifier in $GENERATE"
+					}
+					mod, offset, err = modToPrintf(s[j+2 : j+2+sep])
+					if err != nil {
+						return err.Error()
+					}
+					j += 2 + sep // Jump to it
+				}
+				dom.WriteString(fmt.Sprintf(mod, i+offset))
+			default:
+				if escape { // Pretty useless here
+					escape = false
+					continue
+				}
+				dom.WriteByte(s[j])
+			}
+		}
+		// Re-parse the RR and send it on the current channel t
+		rx, err := NewRR("$ORIGIN " + o + "\n" + dom.String())
+		if err != nil {
+			return err.Error()
+		}
+		t <- &Token{RR: rx}
+		// Its more efficient to first built the rrlist and then parse it in
+		// one go! But is this a problem?
+	}
+	return ""
+}
+
+// Convert a $GENERATE modifier 0,0,d to something Printf can deal with.
+func modToPrintf(s string) (string, int, error) {
+	xs := strings.SplitN(s, ",", 3)
+	if len(xs) != 3 {
+		return "", 0, errors.New("bad modifier in $GENERATE")
+	}
+	// xs[0] is offset, xs[1] is width, xs[2] is base
+	if xs[2] != "o" && xs[2] != "d" && xs[2] != "x" && xs[2] != "X" {
+		return "", 0, errors.New("bad base in $GENERATE")
+	}
+	offset, err := strconv.Atoi(xs[0])
+	if err != nil || offset > 255 {
+		return "", 0, errors.New("bad offset in $GENERATE")
+	}
+	width, err := strconv.Atoi(xs[1])
+	if err != nil || width > 255 {
+		return "", offset, errors.New("bad width in $GENERATE")
+	}
+	switch {
+	case width < 0:
+		return "", offset, errors.New("bad width in $GENERATE")
+	case width == 0:
+		return "%" + xs[1] + xs[2], offset, nil
+	}
+	return "%0" + xs[1] + xs[2], offset, nil
+}
diff --git a/vendor/github.com/miekg/dns/labels.go b/vendor/github.com/miekg/dns/labels.go
new file mode 100644
index 0000000..760b89e
--- /dev/null
+++ b/vendor/github.com/miekg/dns/labels.go
@@ -0,0 +1,191 @@
+package dns
+
+// Holds a bunch of helper functions for dealing with labels.
+
+// SplitDomainName splits a name string into it's labels.
+// www.miek.nl. returns []string{"www", "miek", "nl"}
+// .www.miek.nl. returns []string{"", "www", "miek", "nl"},
+// The root label (.) returns nil. Note that using
+// strings.Split(s) will work in most cases, but does not handle
+// escaped dots (\.) for instance.
+// s must be a syntactically valid domain name, see IsDomainName.
+func SplitDomainName(s string) (labels []string) {
+	if len(s) == 0 {
+		return nil
+	}
+	fqdnEnd := 0 // offset of the final '.' or the length of the name
+	idx := Split(s)
+	begin := 0
+	if s[len(s)-1] == '.' {
+		fqdnEnd = len(s) - 1
+	} else {
+		fqdnEnd = len(s)
+	}
+
+	switch len(idx) {
+	case 0:
+		return nil
+	case 1:
+		// no-op
+	default:
+		end := 0
+		for i := 1; i < len(idx); i++ {
+			end = idx[i]
+			labels = append(labels, s[begin:end-1])
+			begin = end
+		}
+	}
+
+	labels = append(labels, s[begin:fqdnEnd])
+	return labels
+}
+
+// CompareDomainName compares the names s1 and s2 and
+// returns how many labels they have in common starting from the *right*.
+// The comparison stops at the first inequality. The names are downcased
+// before the comparison.
+//
+// www.miek.nl. and miek.nl. have two labels in common: miek and nl
+// www.miek.nl. and www.bla.nl. have one label in common: nl
+//
+// s1 and s2 must be syntactically valid domain names.
+func CompareDomainName(s1, s2 string) (n int) {
+	// the first check: root label
+	if s1 == "." || s2 == "." {
+		return 0
+	}
+
+	l1 := Split(s1)
+	l2 := Split(s2)
+
+	j1 := len(l1) - 1 // end
+	i1 := len(l1) - 2 // start
+	j2 := len(l2) - 1
+	i2 := len(l2) - 2
+	// the second check can be done here: last/only label
+	// before we fall through into the for-loop below
+	if equal(s1[l1[j1]:], s2[l2[j2]:]) {
+		n++
+	} else {
+		return
+	}
+	for {
+		if i1 < 0 || i2 < 0 {
+			break
+		}
+		if equal(s1[l1[i1]:l1[j1]], s2[l2[i2]:l2[j2]]) {
+			n++
+		} else {
+			break
+		}
+		j1--
+		i1--
+		j2--
+		i2--
+	}
+	return
+}
+
+// CountLabel counts the the number of labels in the string s.
+// s must be a syntactically valid domain name.
+func CountLabel(s string) (labels int) {
+	if s == "." {
+		return
+	}
+	off := 0
+	end := false
+	for {
+		off, end = NextLabel(s, off)
+		labels++
+		if end {
+			return
+		}
+	}
+}
+
+// Split splits a name s into its label indexes.
+// www.miek.nl. returns []int{0, 4, 9}, www.miek.nl also returns []int{0, 4, 9}.
+// The root name (.) returns nil. Also see SplitDomainName.
+// s must be a syntactically valid domain name.
+func Split(s string) []int {
+	if s == "." {
+		return nil
+	}
+	idx := make([]int, 1, 3)
+	off := 0
+	end := false
+
+	for {
+		off, end = NextLabel(s, off)
+		if end {
+			return idx
+		}
+		idx = append(idx, off)
+	}
+}
+
+// NextLabel returns the index of the start of the next label in the
+// string s starting at offset.
+// The bool end is true when the end of the string has been reached.
+// Also see PrevLabel.
+func NextLabel(s string, offset int) (i int, end bool) {
+	quote := false
+	for i = offset; i < len(s)-1; i++ {
+		switch s[i] {
+		case '\\':
+			quote = !quote
+		default:
+			quote = false
+		case '.':
+			if quote {
+				quote = !quote
+				continue
+			}
+			return i + 1, false
+		}
+	}
+	return i + 1, true
+}
+
+// PrevLabel returns the index of the label when starting from the right and
+// jumping n labels to the left.
+// The bool start is true when the start of the string has been overshot.
+// Also see NextLabel.
+func PrevLabel(s string, n int) (i int, start bool) {
+	if n == 0 {
+		return len(s), false
+	}
+	lab := Split(s)
+	if lab == nil {
+		return 0, true
+	}
+	if n > len(lab) {
+		return 0, true
+	}
+	return lab[len(lab)-n], false
+}
+
+// equal compares a and b while ignoring case. It returns true when equal otherwise false.
+func equal(a, b string) bool {
+	// might be lifted into API function.
+	la := len(a)
+	lb := len(b)
+	if la != lb {
+		return false
+	}
+
+	for i := la - 1; i >= 0; i-- {
+		ai := a[i]
+		bi := b[i]
+		if ai >= 'A' && ai <= 'Z' {
+			ai |= ('a' - 'A')
+		}
+		if bi >= 'A' && bi <= 'Z' {
+			bi |= ('a' - 'A')
+		}
+		if ai != bi {
+			return false
+		}
+	}
+	return true
+}
diff --git a/vendor/github.com/miekg/dns/msg.go b/vendor/github.com/miekg/dns/msg.go
new file mode 100644
index 0000000..975dde7
--- /dev/null
+++ b/vendor/github.com/miekg/dns/msg.go
@@ -0,0 +1,1154 @@
+// DNS packet assembly, see RFC 1035. Converting from - Unpack() -
+// and to - Pack() - wire format.
+// All the packers and unpackers take a (msg []byte, off int)
+// and return (off1 int, ok bool).  If they return ok==false, they
+// also return off1==len(msg), so that the next unpacker will
+// also fail.  This lets us avoid checks of ok until the end of a
+// packing sequence.
+
+package dns
+
+//go:generate go run msg_generate.go
+//go:generate go run compress_generate.go
+
+import (
+	crand "crypto/rand"
+	"encoding/binary"
+	"fmt"
+	"math/big"
+	"math/rand"
+	"strconv"
+	"sync"
+)
+
+const (
+	maxCompressionOffset    = 2 << 13 // We have 14 bits for the compression pointer
+	maxDomainNameWireOctets = 255     // See RFC 1035 section 2.3.4
+)
+
+// Errors defined in this package.
+var (
+	ErrAlg           error = &Error{err: "bad algorithm"}                  // ErrAlg indicates an error with the (DNSSEC) algorithm.
+	ErrAuth          error = &Error{err: "bad authentication"}             // ErrAuth indicates an error in the TSIG authentication.
+	ErrBuf           error = &Error{err: "buffer size too small"}          // ErrBuf indicates that the buffer used is too small for the message.
+	ErrConnEmpty     error = &Error{err: "conn has no connection"}         // ErrConnEmpty indicates a connection is being used before it is initialized.
+	ErrExtendedRcode error = &Error{err: "bad extended rcode"}             // ErrExtendedRcode ...
+	ErrFqdn          error = &Error{err: "domain must be fully qualified"} // ErrFqdn indicates that a domain name does not have a closing dot.
+	ErrId            error = &Error{err: "id mismatch"}                    // ErrId indicates there is a mismatch with the message's ID.
+	ErrKeyAlg        error = &Error{err: "bad key algorithm"}              // ErrKeyAlg indicates that the algorithm in the key is not valid.
+	ErrKey           error = &Error{err: "bad key"}
+	ErrKeySize       error = &Error{err: "bad key size"}
+	ErrLongDomain    error = &Error{err: fmt.Sprintf("domain name exceeded %d wire-format octets", maxDomainNameWireOctets)}
+	ErrNoSig         error = &Error{err: "no signature found"}
+	ErrPrivKey       error = &Error{err: "bad private key"}
+	ErrRcode         error = &Error{err: "bad rcode"}
+	ErrRdata         error = &Error{err: "bad rdata"}
+	ErrRRset         error = &Error{err: "bad rrset"}
+	ErrSecret        error = &Error{err: "no secrets defined"}
+	ErrShortRead     error = &Error{err: "short read"}
+	ErrSig           error = &Error{err: "bad signature"}                      // ErrSig indicates that a signature can not be cryptographically validated.
+	ErrSoa           error = &Error{err: "no SOA"}                             // ErrSOA indicates that no SOA RR was seen when doing zone transfers.
+	ErrTime          error = &Error{err: "bad time"}                           // ErrTime indicates a timing error in TSIG authentication.
+	ErrTruncated     error = &Error{err: "failed to unpack truncated message"} // ErrTruncated indicates that we failed to unpack a truncated message. We unpacked as much as we had so Msg can still be used, if desired.
+)
+
+// Id by default, returns a 16 bits random number to be used as a
+// message id. The random provided should be good enough. This being a
+// variable the function can be reassigned to a custom function.
+// For instance, to make it return a static value:
+//
+//	dns.Id = func() uint16 { return 3 }
+var Id = id
+
+var (
+	idLock sync.Mutex
+	idRand *rand.Rand
+)
+
+// id returns a 16 bits random number to be used as a
+// message id. The random provided should be good enough.
+func id() uint16 {
+	idLock.Lock()
+
+	if idRand == nil {
+		// This (partially) works around
+		// https://github.com/golang/go/issues/11833 by only
+		// seeding idRand upon the first call to id.
+
+		var seed int64
+		var buf [8]byte
+
+		if _, err := crand.Read(buf[:]); err == nil {
+			seed = int64(binary.LittleEndian.Uint64(buf[:]))
+		} else {
+			seed = rand.Int63()
+		}
+
+		idRand = rand.New(rand.NewSource(seed))
+	}
+
+	// The call to idRand.Uint32 must be within the
+	// mutex lock because *rand.Rand is not safe for
+	// concurrent use.
+	//
+	// There is no added performance overhead to calling
+	// idRand.Uint32 inside a mutex lock over just
+	// calling rand.Uint32 as the global math/rand rng
+	// is internally protected by a sync.Mutex.
+	id := uint16(idRand.Uint32())
+
+	idLock.Unlock()
+	return id
+}
+
+// MsgHdr is a a manually-unpacked version of (id, bits).
+type MsgHdr struct {
+	Id                 uint16
+	Response           bool
+	Opcode             int
+	Authoritative      bool
+	Truncated          bool
+	RecursionDesired   bool
+	RecursionAvailable bool
+	Zero               bool
+	AuthenticatedData  bool
+	CheckingDisabled   bool
+	Rcode              int
+}
+
+// Msg contains the layout of a DNS message.
+type Msg struct {
+	MsgHdr
+	Compress bool       `json:"-"` // If true, the message will be compressed when converted to wire format.
+	Question []Question // Holds the RR(s) of the question section.
+	Answer   []RR       // Holds the RR(s) of the answer section.
+	Ns       []RR       // Holds the RR(s) of the authority section.
+	Extra    []RR       // Holds the RR(s) of the additional section.
+}
+
+// ClassToString is a maps Classes to strings for each CLASS wire type.
+var ClassToString = map[uint16]string{
+	ClassINET:   "IN",
+	ClassCSNET:  "CS",
+	ClassCHAOS:  "CH",
+	ClassHESIOD: "HS",
+	ClassNONE:   "NONE",
+	ClassANY:    "ANY",
+}
+
+// OpcodeToString maps Opcodes to strings.
+var OpcodeToString = map[int]string{
+	OpcodeQuery:  "QUERY",
+	OpcodeIQuery: "IQUERY",
+	OpcodeStatus: "STATUS",
+	OpcodeNotify: "NOTIFY",
+	OpcodeUpdate: "UPDATE",
+}
+
+// RcodeToString maps Rcodes to strings.
+var RcodeToString = map[int]string{
+	RcodeSuccess:        "NOERROR",
+	RcodeFormatError:    "FORMERR",
+	RcodeServerFailure:  "SERVFAIL",
+	RcodeNameError:      "NXDOMAIN",
+	RcodeNotImplemented: "NOTIMPL",
+	RcodeRefused:        "REFUSED",
+	RcodeYXDomain:       "YXDOMAIN", // See RFC 2136
+	RcodeYXRrset:        "YXRRSET",
+	RcodeNXRrset:        "NXRRSET",
+	RcodeNotAuth:        "NOTAUTH",
+	RcodeNotZone:        "NOTZONE",
+	RcodeBadSig:         "BADSIG", // Also known as RcodeBadVers, see RFC 6891
+	//	RcodeBadVers:        "BADVERS",
+	RcodeBadKey:    "BADKEY",
+	RcodeBadTime:   "BADTIME",
+	RcodeBadMode:   "BADMODE",
+	RcodeBadName:   "BADNAME",
+	RcodeBadAlg:    "BADALG",
+	RcodeBadTrunc:  "BADTRUNC",
+	RcodeBadCookie: "BADCOOKIE",
+}
+
+// Domain names are a sequence of counted strings
+// split at the dots. They end with a zero-length string.
+
+// PackDomainName packs a domain name s into msg[off:].
+// If compression is wanted compress must be true and the compression
+// map needs to hold a mapping between domain names and offsets
+// pointing into msg.
+func PackDomainName(s string, msg []byte, off int, compression map[string]int, compress bool) (off1 int, err error) {
+	off1, _, err = packDomainName(s, msg, off, compression, compress)
+	return
+}
+
+func packDomainName(s string, msg []byte, off int, compression map[string]int, compress bool) (off1 int, labels int, err error) {
+	// special case if msg == nil
+	lenmsg := 256
+	if msg != nil {
+		lenmsg = len(msg)
+	}
+	ls := len(s)
+	if ls == 0 { // Ok, for instance when dealing with update RR without any rdata.
+		return off, 0, nil
+	}
+	// If not fully qualified, error out, but only if msg == nil #ugly
+	switch {
+	case msg == nil:
+		if s[ls-1] != '.' {
+			s += "."
+			ls++
+		}
+	case msg != nil:
+		if s[ls-1] != '.' {
+			return lenmsg, 0, ErrFqdn
+		}
+	}
+	// Each dot ends a segment of the name.
+	// We trade each dot byte for a length byte.
+	// Except for escaped dots (\.), which are normal dots.
+	// There is also a trailing zero.
+
+	// Compression
+	nameoffset := -1
+	pointer := -1
+	// Emit sequence of counted strings, chopping at dots.
+	begin := 0
+	bs := []byte(s)
+	roBs, bsFresh, escapedDot := s, true, false
+	for i := 0; i < ls; i++ {
+		if bs[i] == '\\' {
+			for j := i; j < ls-1; j++ {
+				bs[j] = bs[j+1]
+			}
+			ls--
+			if off+1 > lenmsg {
+				return lenmsg, labels, ErrBuf
+			}
+			// check for \DDD
+			if i+2 < ls && isDigit(bs[i]) && isDigit(bs[i+1]) && isDigit(bs[i+2]) {
+				bs[i] = dddToByte(bs[i:])
+				for j := i + 1; j < ls-2; j++ {
+					bs[j] = bs[j+2]
+				}
+				ls -= 2
+			}
+			escapedDot = bs[i] == '.'
+			bsFresh = false
+			continue
+		}
+
+		if bs[i] == '.' {
+			if i > 0 && bs[i-1] == '.' && !escapedDot {
+				// two dots back to back is not legal
+				return lenmsg, labels, ErrRdata
+			}
+			if i-begin >= 1<<6 { // top two bits of length must be clear
+				return lenmsg, labels, ErrRdata
+			}
+			// off can already (we're in a loop) be bigger than len(msg)
+			// this happens when a name isn't fully qualified
+			if off+1 > lenmsg {
+				return lenmsg, labels, ErrBuf
+			}
+			if msg != nil {
+				msg[off] = byte(i - begin)
+			}
+			offset := off
+			off++
+			for j := begin; j < i; j++ {
+				if off+1 > lenmsg {
+					return lenmsg, labels, ErrBuf
+				}
+				if msg != nil {
+					msg[off] = bs[j]
+				}
+				off++
+			}
+			if compress && !bsFresh {
+				roBs = string(bs)
+				bsFresh = true
+			}
+			// Don't try to compress '.'
+			// We should only compress when compress it true, but we should also still pick
+			// up names that can be used for *future* compression(s).
+			if compression != nil && roBs[begin:] != "." {
+				if p, ok := compression[roBs[begin:]]; !ok {
+					// Only offsets smaller than this can be used.
+					if offset < maxCompressionOffset {
+						compression[roBs[begin:]] = offset
+					}
+				} else {
+					// The first hit is the longest matching dname
+					// keep the pointer offset we get back and store
+					// the offset of the current name, because that's
+					// where we need to insert the pointer later
+
+					// If compress is true, we're allowed to compress this dname
+					if pointer == -1 && compress {
+						pointer = p         // Where to point to
+						nameoffset = offset // Where to point from
+						break
+					}
+				}
+			}
+			labels++
+			begin = i + 1
+		}
+		escapedDot = false
+	}
+	// Root label is special
+	if len(bs) == 1 && bs[0] == '.' {
+		return off, labels, nil
+	}
+	// If we did compression and we find something add the pointer here
+	if pointer != -1 {
+		// We have two bytes (14 bits) to put the pointer in
+		// if msg == nil, we will never do compression
+		binary.BigEndian.PutUint16(msg[nameoffset:], uint16(pointer^0xC000))
+		off = nameoffset + 1
+		goto End
+	}
+	if msg != nil && off < len(msg) {
+		msg[off] = 0
+	}
+End:
+	off++
+	return off, labels, nil
+}
+
+// Unpack a domain name.
+// In addition to the simple sequences of counted strings above,
+// domain names are allowed to refer to strings elsewhere in the
+// packet, to avoid repeating common suffixes when returning
+// many entries in a single domain.  The pointers are marked
+// by a length byte with the top two bits set.  Ignoring those
+// two bits, that byte and the next give a 14 bit offset from msg[0]
+// where we should pick up the trail.
+// Note that if we jump elsewhere in the packet,
+// we return off1 == the offset after the first pointer we found,
+// which is where the next record will start.
+// In theory, the pointers are only allowed to jump backward.
+// We let them jump anywhere and stop jumping after a while.
+
+// UnpackDomainName unpacks a domain name into a string.
+func UnpackDomainName(msg []byte, off int) (string, int, error) {
+	s := make([]byte, 0, 64)
+	off1 := 0
+	lenmsg := len(msg)
+	maxLen := maxDomainNameWireOctets
+	ptr := 0 // number of pointers followed
+Loop:
+	for {
+		if off >= lenmsg {
+			return "", lenmsg, ErrBuf
+		}
+		c := int(msg[off])
+		off++
+		switch c & 0xC0 {
+		case 0x00:
+			if c == 0x00 {
+				// end of name
+				break Loop
+			}
+			// literal string
+			if off+c > lenmsg {
+				return "", lenmsg, ErrBuf
+			}
+			for j := off; j < off+c; j++ {
+				switch b := msg[j]; b {
+				case '.', '(', ')', ';', ' ', '@':
+					fallthrough
+				case '"', '\\':
+					s = append(s, '\\', b)
+					// presentation-format \X escapes add an extra byte
+					maxLen++
+				default:
+					if b < 32 || b >= 127 { // unprintable, use \DDD
+						var buf [3]byte
+						bufs := strconv.AppendInt(buf[:0], int64(b), 10)
+						s = append(s, '\\')
+						for i := 0; i < 3-len(bufs); i++ {
+							s = append(s, '0')
+						}
+						for _, r := range bufs {
+							s = append(s, r)
+						}
+						// presentation-format \DDD escapes add 3 extra bytes
+						maxLen += 3
+					} else {
+						s = append(s, b)
+					}
+				}
+			}
+			s = append(s, '.')
+			off += c
+		case 0xC0:
+			// pointer to somewhere else in msg.
+			// remember location after first ptr,
+			// since that's how many bytes we consumed.
+			// also, don't follow too many pointers --
+			// maybe there's a loop.
+			if off >= lenmsg {
+				return "", lenmsg, ErrBuf
+			}
+			c1 := msg[off]
+			off++
+			if ptr == 0 {
+				off1 = off
+			}
+			if ptr++; ptr > 10 {
+				return "", lenmsg, &Error{err: "too many compression pointers"}
+			}
+			// pointer should guarantee that it advances and points forwards at least
+			// but the condition on previous three lines guarantees that it's
+			// at least loop-free
+			off = (c^0xC0)<<8 | int(c1)
+		default:
+			// 0x80 and 0x40 are reserved
+			return "", lenmsg, ErrRdata
+		}
+	}
+	if ptr == 0 {
+		off1 = off
+	}
+	if len(s) == 0 {
+		s = []byte(".")
+	} else if len(s) >= maxLen {
+		// error if the name is too long, but don't throw it away
+		return string(s), lenmsg, ErrLongDomain
+	}
+	return string(s), off1, nil
+}
+
+func packTxt(txt []string, msg []byte, offset int, tmp []byte) (int, error) {
+	if len(txt) == 0 {
+		if offset >= len(msg) {
+			return offset, ErrBuf
+		}
+		msg[offset] = 0
+		return offset, nil
+	}
+	var err error
+	for i := range txt {
+		if len(txt[i]) > len(tmp) {
+			return offset, ErrBuf
+		}
+		offset, err = packTxtString(txt[i], msg, offset, tmp)
+		if err != nil {
+			return offset, err
+		}
+	}
+	return offset, nil
+}
+
+func packTxtString(s string, msg []byte, offset int, tmp []byte) (int, error) {
+	lenByteOffset := offset
+	if offset >= len(msg) || len(s) > len(tmp) {
+		return offset, ErrBuf
+	}
+	offset++
+	bs := tmp[:len(s)]
+	copy(bs, s)
+	for i := 0; i < len(bs); i++ {
+		if len(msg) <= offset {
+			return offset, ErrBuf
+		}
+		if bs[i] == '\\' {
+			i++
+			if i == len(bs) {
+				break
+			}
+			// check for \DDD
+			if i+2 < len(bs) && isDigit(bs[i]) && isDigit(bs[i+1]) && isDigit(bs[i+2]) {
+				msg[offset] = dddToByte(bs[i:])
+				i += 2
+			} else {
+				msg[offset] = bs[i]
+			}
+		} else {
+			msg[offset] = bs[i]
+		}
+		offset++
+	}
+	l := offset - lenByteOffset - 1
+	if l > 255 {
+		return offset, &Error{err: "string exceeded 255 bytes in txt"}
+	}
+	msg[lenByteOffset] = byte(l)
+	return offset, nil
+}
+
+func packOctetString(s string, msg []byte, offset int, tmp []byte) (int, error) {
+	if offset >= len(msg) || len(s) > len(tmp) {
+		return offset, ErrBuf
+	}
+	bs := tmp[:len(s)]
+	copy(bs, s)
+	for i := 0; i < len(bs); i++ {
+		if len(msg) <= offset {
+			return offset, ErrBuf
+		}
+		if bs[i] == '\\' {
+			i++
+			if i == len(bs) {
+				break
+			}
+			// check for \DDD
+			if i+2 < len(bs) && isDigit(bs[i]) && isDigit(bs[i+1]) && isDigit(bs[i+2]) {
+				msg[offset] = dddToByte(bs[i:])
+				i += 2
+			} else {
+				msg[offset] = bs[i]
+			}
+		} else {
+			msg[offset] = bs[i]
+		}
+		offset++
+	}
+	return offset, nil
+}
+
+func unpackTxt(msg []byte, off0 int) (ss []string, off int, err error) {
+	off = off0
+	var s string
+	for off < len(msg) && err == nil {
+		s, off, err = unpackTxtString(msg, off)
+		if err == nil {
+			ss = append(ss, s)
+		}
+	}
+	return
+}
+
+func unpackTxtString(msg []byte, offset int) (string, int, error) {
+	if offset+1 > len(msg) {
+		return "", offset, &Error{err: "overflow unpacking txt"}
+	}
+	l := int(msg[offset])
+	if offset+l+1 > len(msg) {
+		return "", offset, &Error{err: "overflow unpacking txt"}
+	}
+	s := make([]byte, 0, l)
+	for _, b := range msg[offset+1 : offset+1+l] {
+		switch b {
+		case '"', '\\':
+			s = append(s, '\\', b)
+		default:
+			if b < 32 || b > 127 { // unprintable
+				var buf [3]byte
+				bufs := strconv.AppendInt(buf[:0], int64(b), 10)
+				s = append(s, '\\')
+				for i := 0; i < 3-len(bufs); i++ {
+					s = append(s, '0')
+				}
+				for _, r := range bufs {
+					s = append(s, r)
+				}
+			} else {
+				s = append(s, b)
+			}
+		}
+	}
+	offset += 1 + l
+	return string(s), offset, nil
+}
+
+// Helpers for dealing with escaped bytes
+func isDigit(b byte) bool { return b >= '0' && b <= '9' }
+
+func dddToByte(s []byte) byte {
+	return byte((s[0]-'0')*100 + (s[1]-'0')*10 + (s[2] - '0'))
+}
+
+// Helper function for packing and unpacking
+func intToBytes(i *big.Int, length int) []byte {
+	buf := i.Bytes()
+	if len(buf) < length {
+		b := make([]byte, length)
+		copy(b[length-len(buf):], buf)
+		return b
+	}
+	return buf
+}
+
+// PackRR packs a resource record rr into msg[off:].
+// See PackDomainName for documentation about the compression.
+func PackRR(rr RR, msg []byte, off int, compression map[string]int, compress bool) (off1 int, err error) {
+	if rr == nil {
+		return len(msg), &Error{err: "nil rr"}
+	}
+
+	off1, err = rr.pack(msg, off, compression, compress)
+	if err != nil {
+		return len(msg), err
+	}
+	// TODO(miek): Not sure if this is needed? If removed we can remove rawmsg.go as well.
+	if rawSetRdlength(msg, off, off1) {
+		return off1, nil
+	}
+	return off, ErrRdata
+}
+
+// UnpackRR unpacks msg[off:] into an RR.
+func UnpackRR(msg []byte, off int) (rr RR, off1 int, err error) {
+	h, off, msg, err := unpackHeader(msg, off)
+	if err != nil {
+		return nil, len(msg), err
+	}
+	end := off + int(h.Rdlength)
+
+	if fn, known := typeToUnpack[h.Rrtype]; !known {
+		rr, off, err = unpackRFC3597(h, msg, off)
+	} else {
+		rr, off, err = fn(h, msg, off)
+	}
+	if off != end {
+		return &h, end, &Error{err: "bad rdlength"}
+	}
+	return rr, off, err
+}
+
+// unpackRRslice unpacks msg[off:] into an []RR.
+// If we cannot unpack the whole array, then it will return nil
+func unpackRRslice(l int, msg []byte, off int) (dst1 []RR, off1 int, err error) {
+	var r RR
+	// Don't pre-allocate, l may be under attacker control
+	var dst []RR
+	for i := 0; i < l; i++ {
+		off1 := off
+		r, off, err = UnpackRR(msg, off)
+		if err != nil {
+			off = len(msg)
+			break
+		}
+		// If offset does not increase anymore, l is a lie
+		if off1 == off {
+			l = i
+			break
+		}
+		dst = append(dst, r)
+	}
+	if err != nil && off == len(msg) {
+		dst = nil
+	}
+	return dst, off, err
+}
+
+// Convert a MsgHdr to a string, with dig-like headers:
+//
+//;; opcode: QUERY, status: NOERROR, id: 48404
+//
+//;; flags: qr aa rd ra;
+func (h *MsgHdr) String() string {
+	if h == nil {
+		return "<nil> MsgHdr"
+	}
+
+	s := ";; opcode: " + OpcodeToString[h.Opcode]
+	s += ", status: " + RcodeToString[h.Rcode]
+	s += ", id: " + strconv.Itoa(int(h.Id)) + "\n"
+
+	s += ";; flags:"
+	if h.Response {
+		s += " qr"
+	}
+	if h.Authoritative {
+		s += " aa"
+	}
+	if h.Truncated {
+		s += " tc"
+	}
+	if h.RecursionDesired {
+		s += " rd"
+	}
+	if h.RecursionAvailable {
+		s += " ra"
+	}
+	if h.Zero { // Hmm
+		s += " z"
+	}
+	if h.AuthenticatedData {
+		s += " ad"
+	}
+	if h.CheckingDisabled {
+		s += " cd"
+	}
+
+	s += ";"
+	return s
+}
+
+// Pack packs a Msg: it is converted to to wire format.
+// If the dns.Compress is true the message will be in compressed wire format.
+func (dns *Msg) Pack() (msg []byte, err error) {
+	return dns.PackBuffer(nil)
+}
+
+// PackBuffer packs a Msg, using the given buffer buf. If buf is too small
+// a new buffer is allocated.
+func (dns *Msg) PackBuffer(buf []byte) (msg []byte, err error) {
+	// We use a similar function in tsig.go's stripTsig.
+	var (
+		dh          Header
+		compression map[string]int
+	)
+
+	if dns.Compress {
+		compression = make(map[string]int) // Compression pointer mappings
+	}
+
+	if dns.Rcode < 0 || dns.Rcode > 0xFFF {
+		return nil, ErrRcode
+	}
+	if dns.Rcode > 0xF {
+		// Regular RCODE field is 4 bits
+		opt := dns.IsEdns0()
+		if opt == nil {
+			return nil, ErrExtendedRcode
+		}
+		opt.SetExtendedRcode(uint8(dns.Rcode >> 4))
+		dns.Rcode &= 0xF
+	}
+
+	// Convert convenient Msg into wire-like Header.
+	dh.Id = dns.Id
+	dh.Bits = uint16(dns.Opcode)<<11 | uint16(dns.Rcode)
+	if dns.Response {
+		dh.Bits |= _QR
+	}
+	if dns.Authoritative {
+		dh.Bits |= _AA
+	}
+	if dns.Truncated {
+		dh.Bits |= _TC
+	}
+	if dns.RecursionDesired {
+		dh.Bits |= _RD
+	}
+	if dns.RecursionAvailable {
+		dh.Bits |= _RA
+	}
+	if dns.Zero {
+		dh.Bits |= _Z
+	}
+	if dns.AuthenticatedData {
+		dh.Bits |= _AD
+	}
+	if dns.CheckingDisabled {
+		dh.Bits |= _CD
+	}
+
+	// Prepare variable sized arrays.
+	question := dns.Question
+	answer := dns.Answer
+	ns := dns.Ns
+	extra := dns.Extra
+
+	dh.Qdcount = uint16(len(question))
+	dh.Ancount = uint16(len(answer))
+	dh.Nscount = uint16(len(ns))
+	dh.Arcount = uint16(len(extra))
+
+	// We need the uncompressed length here, because we first pack it and then compress it.
+	msg = buf
+	uncompressedLen := compressedLen(dns, false)
+	if packLen := uncompressedLen + 1; len(msg) < packLen {
+		msg = make([]byte, packLen)
+	}
+
+	// Pack it in: header and then the pieces.
+	off := 0
+	off, err = dh.pack(msg, off, compression, dns.Compress)
+	if err != nil {
+		return nil, err
+	}
+	for i := 0; i < len(question); i++ {
+		off, err = question[i].pack(msg, off, compression, dns.Compress)
+		if err != nil {
+			return nil, err
+		}
+	}
+	for i := 0; i < len(answer); i++ {
+		off, err = PackRR(answer[i], msg, off, compression, dns.Compress)
+		if err != nil {
+			return nil, err
+		}
+	}
+	for i := 0; i < len(ns); i++ {
+		off, err = PackRR(ns[i], msg, off, compression, dns.Compress)
+		if err != nil {
+			return nil, err
+		}
+	}
+	for i := 0; i < len(extra); i++ {
+		off, err = PackRR(extra[i], msg, off, compression, dns.Compress)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return msg[:off], nil
+}
+
+// Unpack unpacks a binary message to a Msg structure.
+func (dns *Msg) Unpack(msg []byte) (err error) {
+	var (
+		dh  Header
+		off int
+	)
+	if dh, off, err = unpackMsgHdr(msg, off); err != nil {
+		return err
+	}
+
+	dns.Id = dh.Id
+	dns.Response = (dh.Bits & _QR) != 0
+	dns.Opcode = int(dh.Bits>>11) & 0xF
+	dns.Authoritative = (dh.Bits & _AA) != 0
+	dns.Truncated = (dh.Bits & _TC) != 0
+	dns.RecursionDesired = (dh.Bits & _RD) != 0
+	dns.RecursionAvailable = (dh.Bits & _RA) != 0
+	dns.Zero = (dh.Bits & _Z) != 0
+	dns.AuthenticatedData = (dh.Bits & _AD) != 0
+	dns.CheckingDisabled = (dh.Bits & _CD) != 0
+	dns.Rcode = int(dh.Bits & 0xF)
+
+	// If we are at the end of the message we should return *just* the
+	// header. This can still be useful to the caller. 9.9.9.9 sends these
+	// when responding with REFUSED for instance.
+	if off == len(msg) {
+		// reset sections before returning
+		dns.Question, dns.Answer, dns.Ns, dns.Extra = nil, nil, nil, nil
+		return nil
+	}
+
+	// Qdcount, Ancount, Nscount, Arcount can't be trusted, as they are
+	// attacker controlled. This means we can't use them to pre-allocate
+	// slices.
+	dns.Question = nil
+	for i := 0; i < int(dh.Qdcount); i++ {
+		off1 := off
+		var q Question
+		q, off, err = unpackQuestion(msg, off)
+		if err != nil {
+			// Even if Truncated is set, we only will set ErrTruncated if we
+			// actually got the questions
+			return err
+		}
+		if off1 == off { // Offset does not increase anymore, dh.Qdcount is a lie!
+			dh.Qdcount = uint16(i)
+			break
+		}
+		dns.Question = append(dns.Question, q)
+	}
+
+	dns.Answer, off, err = unpackRRslice(int(dh.Ancount), msg, off)
+	// The header counts might have been wrong so we need to update it
+	dh.Ancount = uint16(len(dns.Answer))
+	if err == nil {
+		dns.Ns, off, err = unpackRRslice(int(dh.Nscount), msg, off)
+	}
+	// The header counts might have been wrong so we need to update it
+	dh.Nscount = uint16(len(dns.Ns))
+	if err == nil {
+		dns.Extra, off, err = unpackRRslice(int(dh.Arcount), msg, off)
+	}
+	// The header counts might have been wrong so we need to update it
+	dh.Arcount = uint16(len(dns.Extra))
+
+	if off != len(msg) {
+		// TODO(miek) make this an error?
+		// use PackOpt to let people tell how detailed the error reporting should be?
+		// println("dns: extra bytes in dns packet", off, "<", len(msg))
+	} else if dns.Truncated {
+		// Whether we ran into a an error or not, we want to return that it
+		// was truncated
+		err = ErrTruncated
+	}
+	return err
+}
+
+// Convert a complete message to a string with dig-like output.
+func (dns *Msg) String() string {
+	if dns == nil {
+		return "<nil> MsgHdr"
+	}
+	s := dns.MsgHdr.String() + " "
+	s += "QUERY: " + strconv.Itoa(len(dns.Question)) + ", "
+	s += "ANSWER: " + strconv.Itoa(len(dns.Answer)) + ", "
+	s += "AUTHORITY: " + strconv.Itoa(len(dns.Ns)) + ", "
+	s += "ADDITIONAL: " + strconv.Itoa(len(dns.Extra)) + "\n"
+	if len(dns.Question) > 0 {
+		s += "\n;; QUESTION SECTION:\n"
+		for i := 0; i < len(dns.Question); i++ {
+			s += dns.Question[i].String() + "\n"
+		}
+	}
+	if len(dns.Answer) > 0 {
+		s += "\n;; ANSWER SECTION:\n"
+		for i := 0; i < len(dns.Answer); i++ {
+			if dns.Answer[i] != nil {
+				s += dns.Answer[i].String() + "\n"
+			}
+		}
+	}
+	if len(dns.Ns) > 0 {
+		s += "\n;; AUTHORITY SECTION:\n"
+		for i := 0; i < len(dns.Ns); i++ {
+			if dns.Ns[i] != nil {
+				s += dns.Ns[i].String() + "\n"
+			}
+		}
+	}
+	if len(dns.Extra) > 0 {
+		s += "\n;; ADDITIONAL SECTION:\n"
+		for i := 0; i < len(dns.Extra); i++ {
+			if dns.Extra[i] != nil {
+				s += dns.Extra[i].String() + "\n"
+			}
+		}
+	}
+	return s
+}
+
+// Len returns the message length when in (un)compressed wire format.
+// If dns.Compress is true compression it is taken into account. Len()
+// is provided to be a faster way to get the size of the resulting packet,
+// than packing it, measuring the size and discarding the buffer.
+func (dns *Msg) Len() int { return compressedLen(dns, dns.Compress) }
+
+// compressedLen returns the message length when in compressed wire format
+// when compress is true, otherwise the uncompressed length is returned.
+func compressedLen(dns *Msg, compress bool) int {
+	// We always return one more than needed.
+	l := 12 // Message header is always 12 bytes
+	if compress {
+		compression := map[string]int{}
+		for _, r := range dns.Question {
+			l += r.len()
+			compressionLenHelper(compression, r.Name)
+		}
+		l += compressionLenSlice(compression, dns.Answer)
+		l += compressionLenSlice(compression, dns.Ns)
+		l += compressionLenSlice(compression, dns.Extra)
+	} else {
+		for _, r := range dns.Question {
+			l += r.len()
+		}
+		for _, r := range dns.Answer {
+			if r != nil {
+				l += r.len()
+			}
+		}
+		for _, r := range dns.Ns {
+			if r != nil {
+				l += r.len()
+			}
+		}
+		for _, r := range dns.Extra {
+			if r != nil {
+				l += r.len()
+			}
+		}
+	}
+	return l
+}
+
+func compressionLenSlice(c map[string]int, rs []RR) int {
+	var l int
+	for _, r := range rs {
+		if r == nil {
+			continue
+		}
+		l += r.len()
+		k, ok := compressionLenSearch(c, r.Header().Name)
+		if ok {
+			l += 1 - k
+		}
+		compressionLenHelper(c, r.Header().Name)
+		k, ok = compressionLenSearchType(c, r)
+		if ok {
+			l += 1 - k
+		}
+		compressionLenHelperType(c, r)
+	}
+	return l
+}
+
+// Put the parts of the name in the compression map.
+func compressionLenHelper(c map[string]int, s string) {
+	pref := ""
+	lbs := Split(s)
+	for j := len(lbs) - 1; j >= 0; j-- {
+		pref = s[lbs[j]:]
+		if _, ok := c[pref]; !ok {
+			c[pref] = len(pref)
+		}
+	}
+}
+
+// Look for each part in the compression map and returns its length,
+// keep on searching so we get the longest match.
+func compressionLenSearch(c map[string]int, s string) (int, bool) {
+	off := 0
+	end := false
+	if s == "" { // don't bork on bogus data
+		return 0, false
+	}
+	for {
+		if _, ok := c[s[off:]]; ok {
+			return len(s[off:]), true
+		}
+		if end {
+			break
+		}
+		off, end = NextLabel(s, off)
+	}
+	return 0, false
+}
+
+// Copy returns a new RR which is a deep-copy of r.
+func Copy(r RR) RR { r1 := r.copy(); return r1 }
+
+// Len returns the length (in octets) of the uncompressed RR in wire format.
+func Len(r RR) int { return r.len() }
+
+// Copy returns a new *Msg which is a deep-copy of dns.
+func (dns *Msg) Copy() *Msg { return dns.CopyTo(new(Msg)) }
+
+// CopyTo copies the contents to the provided message using a deep-copy and returns the copy.
+func (dns *Msg) CopyTo(r1 *Msg) *Msg {
+	r1.MsgHdr = dns.MsgHdr
+	r1.Compress = dns.Compress
+
+	if len(dns.Question) > 0 {
+		r1.Question = make([]Question, len(dns.Question))
+		copy(r1.Question, dns.Question) // TODO(miek): Question is an immutable value, ok to do a shallow-copy
+	}
+
+	rrArr := make([]RR, len(dns.Answer)+len(dns.Ns)+len(dns.Extra))
+	var rri int
+
+	if len(dns.Answer) > 0 {
+		rrbegin := rri
+		for i := 0; i < len(dns.Answer); i++ {
+			rrArr[rri] = dns.Answer[i].copy()
+			rri++
+		}
+		r1.Answer = rrArr[rrbegin:rri:rri]
+	}
+
+	if len(dns.Ns) > 0 {
+		rrbegin := rri
+		for i := 0; i < len(dns.Ns); i++ {
+			rrArr[rri] = dns.Ns[i].copy()
+			rri++
+		}
+		r1.Ns = rrArr[rrbegin:rri:rri]
+	}
+
+	if len(dns.Extra) > 0 {
+		rrbegin := rri
+		for i := 0; i < len(dns.Extra); i++ {
+			rrArr[rri] = dns.Extra[i].copy()
+			rri++
+		}
+		r1.Extra = rrArr[rrbegin:rri:rri]
+	}
+
+	return r1
+}
+
+func (q *Question) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := PackDomainName(q.Name, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(q.Qtype, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(q.Qclass, msg, off)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
+
+func unpackQuestion(msg []byte, off int) (Question, int, error) {
+	var (
+		q   Question
+		err error
+	)
+	q.Name, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return q, off, err
+	}
+	if off == len(msg) {
+		return q, off, nil
+	}
+	q.Qtype, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return q, off, err
+	}
+	if off == len(msg) {
+		return q, off, nil
+	}
+	q.Qclass, off, err = unpackUint16(msg, off)
+	if off == len(msg) {
+		return q, off, nil
+	}
+	return q, off, err
+}
+
+func (dh *Header) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := packUint16(dh.Id, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(dh.Bits, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(dh.Qdcount, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(dh.Ancount, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(dh.Nscount, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(dh.Arcount, msg, off)
+	return off, err
+}
+
+func unpackMsgHdr(msg []byte, off int) (Header, int, error) {
+	var (
+		dh  Header
+		err error
+	)
+	dh.Id, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return dh, off, err
+	}
+	dh.Bits, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return dh, off, err
+	}
+	dh.Qdcount, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return dh, off, err
+	}
+	dh.Ancount, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return dh, off, err
+	}
+	dh.Nscount, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return dh, off, err
+	}
+	dh.Arcount, off, err = unpackUint16(msg, off)
+	return dh, off, err
+}
diff --git a/vendor/github.com/miekg/dns/msg_generate.go b/vendor/github.com/miekg/dns/msg_generate.go
new file mode 100644
index 0000000..8ba609f
--- /dev/null
+++ b/vendor/github.com/miekg/dns/msg_generate.go
@@ -0,0 +1,348 @@
+//+build ignore
+
+// msg_generate.go is meant to run with go generate. It will use
+// go/{importer,types} to track down all the RR struct types. Then for each type
+// it will generate pack/unpack methods based on the struct tags. The generated source is
+// written to zmsg.go, and is meant to be checked into git.
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"go/format"
+	"go/importer"
+	"go/types"
+	"log"
+	"os"
+	"strings"
+)
+
+var packageHdr = `
+// Code generated by "go run msg_generate.go"; DO NOT EDIT.
+
+package dns
+
+`
+
+// getTypeStruct will take a type and the package scope, and return the
+// (innermost) struct if the type is considered a RR type (currently defined as
+// those structs beginning with a RR_Header, could be redefined as implementing
+// the RR interface). The bool return value indicates if embedded structs were
+// resolved.
+func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) {
+	st, ok := t.Underlying().(*types.Struct)
+	if !ok {
+		return nil, false
+	}
+	if st.Field(0).Type() == scope.Lookup("RR_Header").Type() {
+		return st, false
+	}
+	if st.Field(0).Anonymous() {
+		st, _ := getTypeStruct(st.Field(0).Type(), scope)
+		return st, true
+	}
+	return nil, false
+}
+
+func main() {
+	// Import and type-check the package
+	pkg, err := importer.Default().Import("github.com/miekg/dns")
+	fatalIfErr(err)
+	scope := pkg.Scope()
+
+	// Collect actual types (*X)
+	var namedTypes []string
+	for _, name := range scope.Names() {
+		o := scope.Lookup(name)
+		if o == nil || !o.Exported() {
+			continue
+		}
+		if st, _ := getTypeStruct(o.Type(), scope); st == nil {
+			continue
+		}
+		if name == "PrivateRR" {
+			continue
+		}
+
+		// Check if corresponding TypeX exists
+		if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" {
+			log.Fatalf("Constant Type%s does not exist.", o.Name())
+		}
+
+		namedTypes = append(namedTypes, o.Name())
+	}
+
+	b := &bytes.Buffer{}
+	b.WriteString(packageHdr)
+
+	fmt.Fprint(b, "// pack*() functions\n\n")
+	for _, name := range namedTypes {
+		o := scope.Lookup(name)
+		st, _ := getTypeStruct(o.Type(), scope)
+
+		fmt.Fprintf(b, "func (rr *%s) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {\n", name)
+		fmt.Fprint(b, `off, err := rr.Hdr.pack(msg, off, compression, compress)
+if err != nil {
+	return off, err
+}
+headerEnd := off
+`)
+		for i := 1; i < st.NumFields(); i++ {
+			o := func(s string) {
+				fmt.Fprintf(b, s, st.Field(i).Name())
+				fmt.Fprint(b, `if err != nil {
+return off, err
+}
+`)
+			}
+
+			if _, ok := st.Field(i).Type().(*types.Slice); ok {
+				switch st.Tag(i) {
+				case `dns:"-"`: // ignored
+				case `dns:"txt"`:
+					o("off, err = packStringTxt(rr.%s, msg, off)\n")
+				case `dns:"opt"`:
+					o("off, err = packDataOpt(rr.%s, msg, off)\n")
+				case `dns:"nsec"`:
+					o("off, err = packDataNsec(rr.%s, msg, off)\n")
+				case `dns:"domain-name"`:
+					o("off, err = packDataDomainNames(rr.%s, msg, off, compression, compress)\n")
+				default:
+					log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+				}
+				continue
+			}
+
+			switch {
+			case st.Tag(i) == `dns:"-"`: // ignored
+			case st.Tag(i) == `dns:"cdomain-name"`:
+				o("off, err = PackDomainName(rr.%s, msg, off, compression, compress)\n")
+			case st.Tag(i) == `dns:"domain-name"`:
+				o("off, err = PackDomainName(rr.%s, msg, off, compression, false)\n")
+			case st.Tag(i) == `dns:"a"`:
+				o("off, err = packDataA(rr.%s, msg, off)\n")
+			case st.Tag(i) == `dns:"aaaa"`:
+				o("off, err = packDataAAAA(rr.%s, msg, off)\n")
+			case st.Tag(i) == `dns:"uint48"`:
+				o("off, err = packUint48(rr.%s, msg, off)\n")
+			case st.Tag(i) == `dns:"txt"`:
+				o("off, err = packString(rr.%s, msg, off)\n")
+
+			case strings.HasPrefix(st.Tag(i), `dns:"size-base32`): // size-base32 can be packed just like base32
+				fallthrough
+			case st.Tag(i) == `dns:"base32"`:
+				o("off, err = packStringBase32(rr.%s, msg, off)\n")
+
+			case strings.HasPrefix(st.Tag(i), `dns:"size-base64`): // size-base64 can be packed just like base64
+				fallthrough
+			case st.Tag(i) == `dns:"base64"`:
+				o("off, err = packStringBase64(rr.%s, msg, off)\n")
+
+			case strings.HasPrefix(st.Tag(i), `dns:"size-hex:SaltLength`):
+				// directly write instead of using o() so we get the error check in the correct place
+				field := st.Field(i).Name()
+				fmt.Fprintf(b, `// Only pack salt if value is not "-", i.e. empty
+if rr.%s != "-" {
+  off, err = packStringHex(rr.%s, msg, off)
+  if err != nil {
+    return off, err
+  }
+}
+`, field, field)
+				continue
+			case strings.HasPrefix(st.Tag(i), `dns:"size-hex`): // size-hex can be packed just like hex
+				fallthrough
+			case st.Tag(i) == `dns:"hex"`:
+				o("off, err = packStringHex(rr.%s, msg, off)\n")
+
+			case st.Tag(i) == `dns:"octet"`:
+				o("off, err = packStringOctet(rr.%s, msg, off)\n")
+			case st.Tag(i) == "":
+				switch st.Field(i).Type().(*types.Basic).Kind() {
+				case types.Uint8:
+					o("off, err = packUint8(rr.%s, msg, off)\n")
+				case types.Uint16:
+					o("off, err = packUint16(rr.%s, msg, off)\n")
+				case types.Uint32:
+					o("off, err = packUint32(rr.%s, msg, off)\n")
+				case types.Uint64:
+					o("off, err = packUint64(rr.%s, msg, off)\n")
+				case types.String:
+					o("off, err = packString(rr.%s, msg, off)\n")
+				default:
+					log.Fatalln(name, st.Field(i).Name())
+				}
+			default:
+				log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+			}
+		}
+		// We have packed everything, only now we know the rdlength of this RR
+		fmt.Fprintln(b, "rr.Header().Rdlength = uint16(off-headerEnd)")
+		fmt.Fprintln(b, "return off, nil }\n")
+	}
+
+	fmt.Fprint(b, "// unpack*() functions\n\n")
+	for _, name := range namedTypes {
+		o := scope.Lookup(name)
+		st, _ := getTypeStruct(o.Type(), scope)
+
+		fmt.Fprintf(b, "func unpack%s(h RR_Header, msg []byte, off int) (RR, int, error) {\n", name)
+		fmt.Fprintf(b, "rr := new(%s)\n", name)
+		fmt.Fprint(b, "rr.Hdr = h\n")
+		fmt.Fprint(b, `if noRdata(h) {
+return rr, off, nil
+	}
+var err error
+rdStart := off
+_ = rdStart
+
+`)
+		for i := 1; i < st.NumFields(); i++ {
+			o := func(s string) {
+				fmt.Fprintf(b, s, st.Field(i).Name())
+				fmt.Fprint(b, `if err != nil {
+return rr, off, err
+}
+`)
+			}
+
+			// size-* are special, because they reference a struct member we should use for the length.
+			if strings.HasPrefix(st.Tag(i), `dns:"size-`) {
+				structMember := structMember(st.Tag(i))
+				structTag := structTag(st.Tag(i))
+				switch structTag {
+				case "hex":
+					fmt.Fprintf(b, "rr.%s, off, err = unpackStringHex(msg, off, off + int(rr.%s))\n", st.Field(i).Name(), structMember)
+				case "base32":
+					fmt.Fprintf(b, "rr.%s, off, err = unpackStringBase32(msg, off, off + int(rr.%s))\n", st.Field(i).Name(), structMember)
+				case "base64":
+					fmt.Fprintf(b, "rr.%s, off, err = unpackStringBase64(msg, off, off + int(rr.%s))\n", st.Field(i).Name(), structMember)
+				default:
+					log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+				}
+				fmt.Fprint(b, `if err != nil {
+return rr, off, err
+}
+`)
+				continue
+			}
+
+			if _, ok := st.Field(i).Type().(*types.Slice); ok {
+				switch st.Tag(i) {
+				case `dns:"-"`: // ignored
+				case `dns:"txt"`:
+					o("rr.%s, off, err = unpackStringTxt(msg, off)\n")
+				case `dns:"opt"`:
+					o("rr.%s, off, err = unpackDataOpt(msg, off)\n")
+				case `dns:"nsec"`:
+					o("rr.%s, off, err = unpackDataNsec(msg, off)\n")
+				case `dns:"domain-name"`:
+					o("rr.%s, off, err = unpackDataDomainNames(msg, off, rdStart + int(rr.Hdr.Rdlength))\n")
+				default:
+					log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+				}
+				continue
+			}
+
+			switch st.Tag(i) {
+			case `dns:"-"`: // ignored
+			case `dns:"cdomain-name"`:
+				fallthrough
+			case `dns:"domain-name"`:
+				o("rr.%s, off, err = UnpackDomainName(msg, off)\n")
+			case `dns:"a"`:
+				o("rr.%s, off, err = unpackDataA(msg, off)\n")
+			case `dns:"aaaa"`:
+				o("rr.%s, off, err = unpackDataAAAA(msg, off)\n")
+			case `dns:"uint48"`:
+				o("rr.%s, off, err = unpackUint48(msg, off)\n")
+			case `dns:"txt"`:
+				o("rr.%s, off, err = unpackString(msg, off)\n")
+			case `dns:"base32"`:
+				o("rr.%s, off, err = unpackStringBase32(msg, off, rdStart + int(rr.Hdr.Rdlength))\n")
+			case `dns:"base64"`:
+				o("rr.%s, off, err = unpackStringBase64(msg, off, rdStart + int(rr.Hdr.Rdlength))\n")
+			case `dns:"hex"`:
+				o("rr.%s, off, err = unpackStringHex(msg, off, rdStart + int(rr.Hdr.Rdlength))\n")
+			case `dns:"octet"`:
+				o("rr.%s, off, err = unpackStringOctet(msg, off)\n")
+			case "":
+				switch st.Field(i).Type().(*types.Basic).Kind() {
+				case types.Uint8:
+					o("rr.%s, off, err = unpackUint8(msg, off)\n")
+				case types.Uint16:
+					o("rr.%s, off, err = unpackUint16(msg, off)\n")
+				case types.Uint32:
+					o("rr.%s, off, err = unpackUint32(msg, off)\n")
+				case types.Uint64:
+					o("rr.%s, off, err = unpackUint64(msg, off)\n")
+				case types.String:
+					o("rr.%s, off, err = unpackString(msg, off)\n")
+				default:
+					log.Fatalln(name, st.Field(i).Name())
+				}
+			default:
+				log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+			}
+			// If we've hit len(msg) we return without error.
+			if i < st.NumFields()-1 {
+				fmt.Fprintf(b, `if off == len(msg) {
+return rr, off, nil
+	}
+`)
+			}
+		}
+		fmt.Fprintf(b, "return rr, off, err }\n\n")
+	}
+	// Generate typeToUnpack map
+	fmt.Fprintln(b, "var typeToUnpack = map[uint16]func(RR_Header, []byte, int) (RR, int, error){")
+	for _, name := range namedTypes {
+		if name == "RFC3597" {
+			continue
+		}
+		fmt.Fprintf(b, "Type%s: unpack%s,\n", name, name)
+	}
+	fmt.Fprintln(b, "}\n")
+
+	// gofmt
+	res, err := format.Source(b.Bytes())
+	if err != nil {
+		b.WriteTo(os.Stderr)
+		log.Fatal(err)
+	}
+
+	// write result
+	f, err := os.Create("zmsg.go")
+	fatalIfErr(err)
+	defer f.Close()
+	f.Write(res)
+}
+
+// structMember will take a tag like dns:"size-base32:SaltLength" and return the last part of this string.
+func structMember(s string) string {
+	fields := strings.Split(s, ":")
+	if len(fields) == 0 {
+		return ""
+	}
+	f := fields[len(fields)-1]
+	// f should have a closing "
+	if len(f) > 1 {
+		return f[:len(f)-1]
+	}
+	return f
+}
+
+// structTag will take a tag like dns:"size-base32:SaltLength" and return base32.
+func structTag(s string) string {
+	fields := strings.Split(s, ":")
+	if len(fields) < 2 {
+		return ""
+	}
+	return fields[1][len("\"size-"):]
+}
+
+func fatalIfErr(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/vendor/github.com/miekg/dns/msg_helpers.go b/vendor/github.com/miekg/dns/msg_helpers.go
new file mode 100644
index 0000000..946d5ac
--- /dev/null
+++ b/vendor/github.com/miekg/dns/msg_helpers.go
@@ -0,0 +1,637 @@
+package dns
+
+import (
+	"encoding/base32"
+	"encoding/base64"
+	"encoding/binary"
+	"encoding/hex"
+	"net"
+	"strconv"
+)
+
+// helper functions called from the generated zmsg.go
+
+// These function are named after the tag to help pack/unpack, if there is no tag it is the name
+// of the type they pack/unpack (string, int, etc). We prefix all with unpackData or packData, so packDataA or
+// packDataDomainName.
+
+func unpackDataA(msg []byte, off int) (net.IP, int, error) {
+	if off+net.IPv4len > len(msg) {
+		return nil, len(msg), &Error{err: "overflow unpacking a"}
+	}
+	a := append(make(net.IP, 0, net.IPv4len), msg[off:off+net.IPv4len]...)
+	off += net.IPv4len
+	return a, off, nil
+}
+
+func packDataA(a net.IP, msg []byte, off int) (int, error) {
+	// It must be a slice of 4, even if it is 16, we encode only the first 4
+	if off+net.IPv4len > len(msg) {
+		return len(msg), &Error{err: "overflow packing a"}
+	}
+	switch len(a) {
+	case net.IPv4len, net.IPv6len:
+		copy(msg[off:], a.To4())
+		off += net.IPv4len
+	case 0:
+		// Allowed, for dynamic updates.
+	default:
+		return len(msg), &Error{err: "overflow packing a"}
+	}
+	return off, nil
+}
+
+func unpackDataAAAA(msg []byte, off int) (net.IP, int, error) {
+	if off+net.IPv6len > len(msg) {
+		return nil, len(msg), &Error{err: "overflow unpacking aaaa"}
+	}
+	aaaa := append(make(net.IP, 0, net.IPv6len), msg[off:off+net.IPv6len]...)
+	off += net.IPv6len
+	return aaaa, off, nil
+}
+
+func packDataAAAA(aaaa net.IP, msg []byte, off int) (int, error) {
+	if off+net.IPv6len > len(msg) {
+		return len(msg), &Error{err: "overflow packing aaaa"}
+	}
+
+	switch len(aaaa) {
+	case net.IPv6len:
+		copy(msg[off:], aaaa)
+		off += net.IPv6len
+	case 0:
+		// Allowed, dynamic updates.
+	default:
+		return len(msg), &Error{err: "overflow packing aaaa"}
+	}
+	return off, nil
+}
+
+// unpackHeader unpacks an RR header, returning the offset to the end of the header and a
+// re-sliced msg according to the expected length of the RR.
+func unpackHeader(msg []byte, off int) (rr RR_Header, off1 int, truncmsg []byte, err error) {
+	hdr := RR_Header{}
+	if off == len(msg) {
+		return hdr, off, msg, nil
+	}
+
+	hdr.Name, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return hdr, len(msg), msg, err
+	}
+	hdr.Rrtype, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return hdr, len(msg), msg, err
+	}
+	hdr.Class, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return hdr, len(msg), msg, err
+	}
+	hdr.Ttl, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return hdr, len(msg), msg, err
+	}
+	hdr.Rdlength, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return hdr, len(msg), msg, err
+	}
+	msg, err = truncateMsgFromRdlength(msg, off, hdr.Rdlength)
+	return hdr, off, msg, err
+}
+
+// pack packs an RR header, returning the offset to the end of the header.
+// See PackDomainName for documentation about the compression.
+func (hdr RR_Header) pack(msg []byte, off int, compression map[string]int, compress bool) (off1 int, err error) {
+	if off == len(msg) {
+		return off, nil
+	}
+
+	off, err = PackDomainName(hdr.Name, msg, off, compression, compress)
+	if err != nil {
+		return len(msg), err
+	}
+	off, err = packUint16(hdr.Rrtype, msg, off)
+	if err != nil {
+		return len(msg), err
+	}
+	off, err = packUint16(hdr.Class, msg, off)
+	if err != nil {
+		return len(msg), err
+	}
+	off, err = packUint32(hdr.Ttl, msg, off)
+	if err != nil {
+		return len(msg), err
+	}
+	off, err = packUint16(hdr.Rdlength, msg, off)
+	if err != nil {
+		return len(msg), err
+	}
+	return off, nil
+}
+
+// helper helper functions.
+
+// truncateMsgFromRdLength truncates msg to match the expected length of the RR.
+// Returns an error if msg is smaller than the expected size.
+func truncateMsgFromRdlength(msg []byte, off int, rdlength uint16) (truncmsg []byte, err error) {
+	lenrd := off + int(rdlength)
+	if lenrd > len(msg) {
+		return msg, &Error{err: "overflowing header size"}
+	}
+	return msg[:lenrd], nil
+}
+
+func fromBase32(s []byte) (buf []byte, err error) {
+	for i, b := range s {
+		if b >= 'a' && b <= 'z' {
+			s[i] = b - 32
+		}
+	}
+	buflen := base32.HexEncoding.DecodedLen(len(s))
+	buf = make([]byte, buflen)
+	n, err := base32.HexEncoding.Decode(buf, s)
+	buf = buf[:n]
+	return
+}
+
+func toBase32(b []byte) string { return base32.HexEncoding.EncodeToString(b) }
+
+func fromBase64(s []byte) (buf []byte, err error) {
+	buflen := base64.StdEncoding.DecodedLen(len(s))
+	buf = make([]byte, buflen)
+	n, err := base64.StdEncoding.Decode(buf, s)
+	buf = buf[:n]
+	return
+}
+
+func toBase64(b []byte) string { return base64.StdEncoding.EncodeToString(b) }
+
+// dynamicUpdate returns true if the Rdlength is zero.
+func noRdata(h RR_Header) bool { return h.Rdlength == 0 }
+
+func unpackUint8(msg []byte, off int) (i uint8, off1 int, err error) {
+	if off+1 > len(msg) {
+		return 0, len(msg), &Error{err: "overflow unpacking uint8"}
+	}
+	return uint8(msg[off]), off + 1, nil
+}
+
+func packUint8(i uint8, msg []byte, off int) (off1 int, err error) {
+	if off+1 > len(msg) {
+		return len(msg), &Error{err: "overflow packing uint8"}
+	}
+	msg[off] = byte(i)
+	return off + 1, nil
+}
+
+func unpackUint16(msg []byte, off int) (i uint16, off1 int, err error) {
+	if off+2 > len(msg) {
+		return 0, len(msg), &Error{err: "overflow unpacking uint16"}
+	}
+	return binary.BigEndian.Uint16(msg[off:]), off + 2, nil
+}
+
+func packUint16(i uint16, msg []byte, off int) (off1 int, err error) {
+	if off+2 > len(msg) {
+		return len(msg), &Error{err: "overflow packing uint16"}
+	}
+	binary.BigEndian.PutUint16(msg[off:], i)
+	return off + 2, nil
+}
+
+func unpackUint32(msg []byte, off int) (i uint32, off1 int, err error) {
+	if off+4 > len(msg) {
+		return 0, len(msg), &Error{err: "overflow unpacking uint32"}
+	}
+	return binary.BigEndian.Uint32(msg[off:]), off + 4, nil
+}
+
+func packUint32(i uint32, msg []byte, off int) (off1 int, err error) {
+	if off+4 > len(msg) {
+		return len(msg), &Error{err: "overflow packing uint32"}
+	}
+	binary.BigEndian.PutUint32(msg[off:], i)
+	return off + 4, nil
+}
+
+func unpackUint48(msg []byte, off int) (i uint64, off1 int, err error) {
+	if off+6 > len(msg) {
+		return 0, len(msg), &Error{err: "overflow unpacking uint64 as uint48"}
+	}
+	// Used in TSIG where the last 48 bits are occupied, so for now, assume a uint48 (6 bytes)
+	i = (uint64(uint64(msg[off])<<40 | uint64(msg[off+1])<<32 | uint64(msg[off+2])<<24 | uint64(msg[off+3])<<16 |
+		uint64(msg[off+4])<<8 | uint64(msg[off+5])))
+	off += 6
+	return i, off, nil
+}
+
+func packUint48(i uint64, msg []byte, off int) (off1 int, err error) {
+	if off+6 > len(msg) {
+		return len(msg), &Error{err: "overflow packing uint64 as uint48"}
+	}
+	msg[off] = byte(i >> 40)
+	msg[off+1] = byte(i >> 32)
+	msg[off+2] = byte(i >> 24)
+	msg[off+3] = byte(i >> 16)
+	msg[off+4] = byte(i >> 8)
+	msg[off+5] = byte(i)
+	off += 6
+	return off, nil
+}
+
+func unpackUint64(msg []byte, off int) (i uint64, off1 int, err error) {
+	if off+8 > len(msg) {
+		return 0, len(msg), &Error{err: "overflow unpacking uint64"}
+	}
+	return binary.BigEndian.Uint64(msg[off:]), off + 8, nil
+}
+
+func packUint64(i uint64, msg []byte, off int) (off1 int, err error) {
+	if off+8 > len(msg) {
+		return len(msg), &Error{err: "overflow packing uint64"}
+	}
+	binary.BigEndian.PutUint64(msg[off:], i)
+	off += 8
+	return off, nil
+}
+
+func unpackString(msg []byte, off int) (string, int, error) {
+	if off+1 > len(msg) {
+		return "", off, &Error{err: "overflow unpacking txt"}
+	}
+	l := int(msg[off])
+	if off+l+1 > len(msg) {
+		return "", off, &Error{err: "overflow unpacking txt"}
+	}
+	s := make([]byte, 0, l)
+	for _, b := range msg[off+1 : off+1+l] {
+		switch b {
+		case '"', '\\':
+			s = append(s, '\\', b)
+		default:
+			if b < 32 || b > 127 { // unprintable
+				var buf [3]byte
+				bufs := strconv.AppendInt(buf[:0], int64(b), 10)
+				s = append(s, '\\')
+				for i := 0; i < 3-len(bufs); i++ {
+					s = append(s, '0')
+				}
+				for _, r := range bufs {
+					s = append(s, r)
+				}
+			} else {
+				s = append(s, b)
+			}
+		}
+	}
+	off += 1 + l
+	return string(s), off, nil
+}
+
+func packString(s string, msg []byte, off int) (int, error) {
+	txtTmp := make([]byte, 256*4+1)
+	off, err := packTxtString(s, msg, off, txtTmp)
+	if err != nil {
+		return len(msg), err
+	}
+	return off, nil
+}
+
+func unpackStringBase32(msg []byte, off, end int) (string, int, error) {
+	if end > len(msg) {
+		return "", len(msg), &Error{err: "overflow unpacking base32"}
+	}
+	s := toBase32(msg[off:end])
+	return s, end, nil
+}
+
+func packStringBase32(s string, msg []byte, off int) (int, error) {
+	b32, err := fromBase32([]byte(s))
+	if err != nil {
+		return len(msg), err
+	}
+	if off+len(b32) > len(msg) {
+		return len(msg), &Error{err: "overflow packing base32"}
+	}
+	copy(msg[off:off+len(b32)], b32)
+	off += len(b32)
+	return off, nil
+}
+
+func unpackStringBase64(msg []byte, off, end int) (string, int, error) {
+	// Rest of the RR is base64 encoded value, so we don't need an explicit length
+	// to be set. Thus far all RR's that have base64 encoded fields have those as their
+	// last one. What we do need is the end of the RR!
+	if end > len(msg) {
+		return "", len(msg), &Error{err: "overflow unpacking base64"}
+	}
+	s := toBase64(msg[off:end])
+	return s, end, nil
+}
+
+func packStringBase64(s string, msg []byte, off int) (int, error) {
+	b64, err := fromBase64([]byte(s))
+	if err != nil {
+		return len(msg), err
+	}
+	if off+len(b64) > len(msg) {
+		return len(msg), &Error{err: "overflow packing base64"}
+	}
+	copy(msg[off:off+len(b64)], b64)
+	off += len(b64)
+	return off, nil
+}
+
+func unpackStringHex(msg []byte, off, end int) (string, int, error) {
+	// Rest of the RR is hex encoded value, so we don't need an explicit length
+	// to be set. NSEC and TSIG have hex fields with a length field.
+	// What we do need is the end of the RR!
+	if end > len(msg) {
+		return "", len(msg), &Error{err: "overflow unpacking hex"}
+	}
+
+	s := hex.EncodeToString(msg[off:end])
+	return s, end, nil
+}
+
+func packStringHex(s string, msg []byte, off int) (int, error) {
+	h, err := hex.DecodeString(s)
+	if err != nil {
+		return len(msg), err
+	}
+	if off+(len(h)) > len(msg) {
+		return len(msg), &Error{err: "overflow packing hex"}
+	}
+	copy(msg[off:off+len(h)], h)
+	off += len(h)
+	return off, nil
+}
+
+func unpackStringTxt(msg []byte, off int) ([]string, int, error) {
+	txt, off, err := unpackTxt(msg, off)
+	if err != nil {
+		return nil, len(msg), err
+	}
+	return txt, off, nil
+}
+
+func packStringTxt(s []string, msg []byte, off int) (int, error) {
+	txtTmp := make([]byte, 256*4+1) // If the whole string consists out of \DDD we need this many.
+	off, err := packTxt(s, msg, off, txtTmp)
+	if err != nil {
+		return len(msg), err
+	}
+	return off, nil
+}
+
+func unpackDataOpt(msg []byte, off int) ([]EDNS0, int, error) {
+	var edns []EDNS0
+Option:
+	code := uint16(0)
+	if off+4 > len(msg) {
+		return nil, len(msg), &Error{err: "overflow unpacking opt"}
+	}
+	code = binary.BigEndian.Uint16(msg[off:])
+	off += 2
+	optlen := binary.BigEndian.Uint16(msg[off:])
+	off += 2
+	if off+int(optlen) > len(msg) {
+		return nil, len(msg), &Error{err: "overflow unpacking opt"}
+	}
+	switch code {
+	case EDNS0NSID:
+		e := new(EDNS0_NSID)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0SUBNET:
+		e := new(EDNS0_SUBNET)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0COOKIE:
+		e := new(EDNS0_COOKIE)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0UL:
+		e := new(EDNS0_UL)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0LLQ:
+		e := new(EDNS0_LLQ)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0DAU:
+		e := new(EDNS0_DAU)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0DHU:
+		e := new(EDNS0_DHU)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0N3U:
+		e := new(EDNS0_N3U)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	case EDNS0PADDING:
+		e := new(EDNS0_PADDING)
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	default:
+		e := new(EDNS0_LOCAL)
+		e.Code = code
+		if err := e.unpack(msg[off : off+int(optlen)]); err != nil {
+			return nil, len(msg), err
+		}
+		edns = append(edns, e)
+		off += int(optlen)
+	}
+
+	if off < len(msg) {
+		goto Option
+	}
+
+	return edns, off, nil
+}
+
+func packDataOpt(options []EDNS0, msg []byte, off int) (int, error) {
+	for _, el := range options {
+		b, err := el.pack()
+		if err != nil || off+3 > len(msg) {
+			return len(msg), &Error{err: "overflow packing opt"}
+		}
+		binary.BigEndian.PutUint16(msg[off:], el.Option())      // Option code
+		binary.BigEndian.PutUint16(msg[off+2:], uint16(len(b))) // Length
+		off += 4
+		if off+len(b) > len(msg) {
+			copy(msg[off:], b)
+			off = len(msg)
+			continue
+		}
+		// Actual data
+		copy(msg[off:off+len(b)], b)
+		off += len(b)
+	}
+	return off, nil
+}
+
+func unpackStringOctet(msg []byte, off int) (string, int, error) {
+	s := string(msg[off:])
+	return s, len(msg), nil
+}
+
+func packStringOctet(s string, msg []byte, off int) (int, error) {
+	txtTmp := make([]byte, 256*4+1)
+	off, err := packOctetString(s, msg, off, txtTmp)
+	if err != nil {
+		return len(msg), err
+	}
+	return off, nil
+}
+
+func unpackDataNsec(msg []byte, off int) ([]uint16, int, error) {
+	var nsec []uint16
+	length, window, lastwindow := 0, 0, -1
+	for off < len(msg) {
+		if off+2 > len(msg) {
+			return nsec, len(msg), &Error{err: "overflow unpacking nsecx"}
+		}
+		window = int(msg[off])
+		length = int(msg[off+1])
+		off += 2
+		if window <= lastwindow {
+			// RFC 4034: Blocks are present in the NSEC RR RDATA in
+			// increasing numerical order.
+			return nsec, len(msg), &Error{err: "out of order NSEC block"}
+		}
+		if length == 0 {
+			// RFC 4034: Blocks with no types present MUST NOT be included.
+			return nsec, len(msg), &Error{err: "empty NSEC block"}
+		}
+		if length > 32 {
+			return nsec, len(msg), &Error{err: "NSEC block too long"}
+		}
+		if off+length > len(msg) {
+			return nsec, len(msg), &Error{err: "overflowing NSEC block"}
+		}
+
+		// Walk the bytes in the window and extract the type bits
+		for j := 0; j < length; j++ {
+			b := msg[off+j]
+			// Check the bits one by one, and set the type
+			if b&0x80 == 0x80 {
+				nsec = append(nsec, uint16(window*256+j*8+0))
+			}
+			if b&0x40 == 0x40 {
+				nsec = append(nsec, uint16(window*256+j*8+1))
+			}
+			if b&0x20 == 0x20 {
+				nsec = append(nsec, uint16(window*256+j*8+2))
+			}
+			if b&0x10 == 0x10 {
+				nsec = append(nsec, uint16(window*256+j*8+3))
+			}
+			if b&0x8 == 0x8 {
+				nsec = append(nsec, uint16(window*256+j*8+4))
+			}
+			if b&0x4 == 0x4 {
+				nsec = append(nsec, uint16(window*256+j*8+5))
+			}
+			if b&0x2 == 0x2 {
+				nsec = append(nsec, uint16(window*256+j*8+6))
+			}
+			if b&0x1 == 0x1 {
+				nsec = append(nsec, uint16(window*256+j*8+7))
+			}
+		}
+		off += length
+		lastwindow = window
+	}
+	return nsec, off, nil
+}
+
+func packDataNsec(bitmap []uint16, msg []byte, off int) (int, error) {
+	if len(bitmap) == 0 {
+		return off, nil
+	}
+	var lastwindow, lastlength uint16
+	for j := 0; j < len(bitmap); j++ {
+		t := bitmap[j]
+		window := t / 256
+		length := (t-window*256)/8 + 1
+		if window > lastwindow && lastlength != 0 { // New window, jump to the new offset
+			off += int(lastlength) + 2
+			lastlength = 0
+		}
+		if window < lastwindow || length < lastlength {
+			return len(msg), &Error{err: "nsec bits out of order"}
+		}
+		if off+2+int(length) > len(msg) {
+			return len(msg), &Error{err: "overflow packing nsec"}
+		}
+		// Setting the window #
+		msg[off] = byte(window)
+		// Setting the octets length
+		msg[off+1] = byte(length)
+		// Setting the bit value for the type in the right octet
+		msg[off+1+int(length)] |= byte(1 << (7 - (t % 8)))
+		lastwindow, lastlength = window, length
+	}
+	off += int(lastlength) + 2
+	return off, nil
+}
+
+func unpackDataDomainNames(msg []byte, off, end int) ([]string, int, error) {
+	var (
+		servers []string
+		s       string
+		err     error
+	)
+	if end > len(msg) {
+		return nil, len(msg), &Error{err: "overflow unpacking domain names"}
+	}
+	for off < end {
+		s, off, err = UnpackDomainName(msg, off)
+		if err != nil {
+			return servers, len(msg), err
+		}
+		servers = append(servers, s)
+	}
+	return servers, off, nil
+}
+
+func packDataDomainNames(names []string, msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	var err error
+	for j := 0; j < len(names); j++ {
+		off, err = PackDomainName(names[j], msg, off, compression, false && compress)
+		if err != nil {
+			return len(msg), err
+		}
+	}
+	return off, nil
+}
diff --git a/vendor/github.com/miekg/dns/nsecx.go b/vendor/github.com/miekg/dns/nsecx.go
new file mode 100644
index 0000000..9b908c4
--- /dev/null
+++ b/vendor/github.com/miekg/dns/nsecx.go
@@ -0,0 +1,106 @@
+package dns
+
+import (
+	"crypto/sha1"
+	"hash"
+	"strings"
+)
+
+type saltWireFmt struct {
+	Salt string `dns:"size-hex"`
+}
+
+// HashName hashes a string (label) according to RFC 5155. It returns the hashed string in uppercase.
+func HashName(label string, ha uint8, iter uint16, salt string) string {
+	saltwire := new(saltWireFmt)
+	saltwire.Salt = salt
+	wire := make([]byte, DefaultMsgSize)
+	n, err := packSaltWire(saltwire, wire)
+	if err != nil {
+		return ""
+	}
+	wire = wire[:n]
+	name := make([]byte, 255)
+	off, err := PackDomainName(strings.ToLower(label), name, 0, nil, false)
+	if err != nil {
+		return ""
+	}
+	name = name[:off]
+	var s hash.Hash
+	switch ha {
+	case SHA1:
+		s = sha1.New()
+	default:
+		return ""
+	}
+
+	// k = 0
+	s.Write(name)
+	s.Write(wire)
+	nsec3 := s.Sum(nil)
+	// k > 0
+	for k := uint16(0); k < iter; k++ {
+		s.Reset()
+		s.Write(nsec3)
+		s.Write(wire)
+		nsec3 = s.Sum(nsec3[:0])
+	}
+	return toBase32(nsec3)
+}
+
+// Cover returns true if a name is covered by the NSEC3 record
+func (rr *NSEC3) Cover(name string) bool {
+	nameHash := HashName(name, rr.Hash, rr.Iterations, rr.Salt)
+	owner := strings.ToUpper(rr.Hdr.Name)
+	labelIndices := Split(owner)
+	if len(labelIndices) < 2 {
+		return false
+	}
+	ownerHash := owner[:labelIndices[1]-1]
+	ownerZone := owner[labelIndices[1]:]
+	if !IsSubDomain(ownerZone, strings.ToUpper(name)) { // name is outside owner zone
+		return false
+	}
+
+	nextHash := rr.NextDomain
+	if ownerHash == nextHash { // empty interval
+		return false
+	}
+	if ownerHash > nextHash { // end of zone
+		if nameHash > ownerHash { // covered since there is nothing after ownerHash
+			return true
+		}
+		return nameHash < nextHash // if nameHash is before beginning of zone it is covered
+	}
+	if nameHash < ownerHash { // nameHash is before ownerHash, not covered
+		return false
+	}
+	return nameHash < nextHash // if nameHash is before nextHash is it covered (between ownerHash and nextHash)
+}
+
+// Match returns true if a name matches the NSEC3 record
+func (rr *NSEC3) Match(name string) bool {
+	nameHash := HashName(name, rr.Hash, rr.Iterations, rr.Salt)
+	owner := strings.ToUpper(rr.Hdr.Name)
+	labelIndices := Split(owner)
+	if len(labelIndices) < 2 {
+		return false
+	}
+	ownerHash := owner[:labelIndices[1]-1]
+	ownerZone := owner[labelIndices[1]:]
+	if !IsSubDomain(ownerZone, strings.ToUpper(name)) { // name is outside owner zone
+		return false
+	}
+	if ownerHash == nameHash {
+		return true
+	}
+	return false
+}
+
+func packSaltWire(sw *saltWireFmt, msg []byte) (int, error) {
+	off, err := packStringHex(sw.Salt, msg, 0)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
diff --git a/vendor/github.com/miekg/dns/privaterr.go b/vendor/github.com/miekg/dns/privaterr.go
new file mode 100644
index 0000000..6b08e6e
--- /dev/null
+++ b/vendor/github.com/miekg/dns/privaterr.go
@@ -0,0 +1,149 @@
+package dns
+
+import (
+	"fmt"
+	"strings"
+)
+
+// PrivateRdata is an interface used for implementing "Private Use" RR types, see
+// RFC 6895. This allows one to experiment with new RR types, without requesting an
+// official type code. Also see dns.PrivateHandle and dns.PrivateHandleRemove.
+type PrivateRdata interface {
+	// String returns the text presentaton of the Rdata of the Private RR.
+	String() string
+	// Parse parses the Rdata of the private RR.
+	Parse([]string) error
+	// Pack is used when packing a private RR into a buffer.
+	Pack([]byte) (int, error)
+	// Unpack is used when unpacking a private RR from a buffer.
+	// TODO(miek): diff. signature than Pack, see edns0.go for instance.
+	Unpack([]byte) (int, error)
+	// Copy copies the Rdata.
+	Copy(PrivateRdata) error
+	// Len returns the length in octets of the Rdata.
+	Len() int
+}
+
+// PrivateRR represents an RR that uses a PrivateRdata user-defined type.
+// It mocks normal RRs and implements dns.RR interface.
+type PrivateRR struct {
+	Hdr  RR_Header
+	Data PrivateRdata
+}
+
+func mkPrivateRR(rrtype uint16) *PrivateRR {
+	// Panics if RR is not an instance of PrivateRR.
+	rrfunc, ok := TypeToRR[rrtype]
+	if !ok {
+		panic(fmt.Sprintf("dns: invalid operation with Private RR type %d", rrtype))
+	}
+
+	anyrr := rrfunc()
+	switch rr := anyrr.(type) {
+	case *PrivateRR:
+		return rr
+	}
+	panic(fmt.Sprintf("dns: RR is not a PrivateRR, TypeToRR[%d] generator returned %T", rrtype, anyrr))
+}
+
+// Header return the RR header of r.
+func (r *PrivateRR) Header() *RR_Header { return &r.Hdr }
+
+func (r *PrivateRR) String() string { return r.Hdr.String() + r.Data.String() }
+
+// Private len and copy parts to satisfy RR interface.
+func (r *PrivateRR) len() int { return r.Hdr.len() + r.Data.Len() }
+func (r *PrivateRR) copy() RR {
+	// make new RR like this:
+	rr := mkPrivateRR(r.Hdr.Rrtype)
+	newh := r.Hdr.copyHeader()
+	rr.Hdr = *newh
+
+	err := r.Data.Copy(rr.Data)
+	if err != nil {
+		panic("dns: got value that could not be used to copy Private rdata")
+	}
+	return rr
+}
+func (r *PrivateRR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := r.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	n, err := r.Data.Pack(msg[off:])
+	if err != nil {
+		return len(msg), err
+	}
+	off += n
+	r.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+// PrivateHandle registers a private resource record type. It requires
+// string and numeric representation of private RR type and generator function as argument.
+func PrivateHandle(rtypestr string, rtype uint16, generator func() PrivateRdata) {
+	rtypestr = strings.ToUpper(rtypestr)
+
+	TypeToRR[rtype] = func() RR { return &PrivateRR{RR_Header{}, generator()} }
+	TypeToString[rtype] = rtypestr
+	StringToType[rtypestr] = rtype
+
+	typeToUnpack[rtype] = func(h RR_Header, msg []byte, off int) (RR, int, error) {
+		if noRdata(h) {
+			return &h, off, nil
+		}
+		var err error
+
+		rr := mkPrivateRR(h.Rrtype)
+		rr.Hdr = h
+
+		off1, err := rr.Data.Unpack(msg[off:])
+		off += off1
+		if err != nil {
+			return rr, off, err
+		}
+		return rr, off, err
+	}
+
+	setPrivateRR := func(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+		rr := mkPrivateRR(h.Rrtype)
+		rr.Hdr = h
+
+		var l lex
+		text := make([]string, 0, 2) // could be 0..N elements, median is probably 1
+	Fetch:
+		for {
+			// TODO(miek): we could also be returning _QUOTE, this might or might not
+			// be an issue (basically parsing TXT becomes hard)
+			switch l = <-c; l.value {
+			case zNewline, zEOF:
+				break Fetch
+			case zString:
+				text = append(text, l.token)
+			}
+		}
+
+		err := rr.Data.Parse(text)
+		if err != nil {
+			return nil, &ParseError{f, err.Error(), l}, ""
+		}
+
+		return rr, nil, ""
+	}
+
+	typeToparserFunc[rtype] = parserFunc{setPrivateRR, true}
+}
+
+// PrivateHandleRemove removes defenitions required to support private RR type.
+func PrivateHandleRemove(rtype uint16) {
+	rtypestr, ok := TypeToString[rtype]
+	if ok {
+		delete(TypeToRR, rtype)
+		delete(TypeToString, rtype)
+		delete(typeToparserFunc, rtype)
+		delete(StringToType, rtypestr)
+		delete(typeToUnpack, rtype)
+	}
+	return
+}
diff --git a/vendor/github.com/miekg/dns/rawmsg.go b/vendor/github.com/miekg/dns/rawmsg.go
new file mode 100644
index 0000000..6e21fba
--- /dev/null
+++ b/vendor/github.com/miekg/dns/rawmsg.go
@@ -0,0 +1,49 @@
+package dns
+
+import "encoding/binary"
+
+// rawSetRdlength sets the rdlength in the header of
+// the RR. The offset 'off' must be positioned at the
+// start of the header of the RR, 'end' must be the
+// end of the RR.
+func rawSetRdlength(msg []byte, off, end int) bool {
+	l := len(msg)
+Loop:
+	for {
+		if off+1 > l {
+			return false
+		}
+		c := int(msg[off])
+		off++
+		switch c & 0xC0 {
+		case 0x00:
+			if c == 0x00 {
+				// End of the domainname
+				break Loop
+			}
+			if off+c > l {
+				return false
+			}
+			off += c
+
+		case 0xC0:
+			// pointer, next byte included, ends domainname
+			off++
+			break Loop
+		}
+	}
+	// The domainname has been seen, we at the start of the fixed part in the header.
+	// Type is 2 bytes, class is 2 bytes, ttl 4 and then 2 bytes for the length.
+	off += 2 + 2 + 4
+	if off+2 > l {
+		return false
+	}
+	//off+1 is the end of the header, 'end' is the end of the rr
+	//so 'end' - 'off+2' is the length of the rdata
+	rdatalen := end - (off + 2)
+	if rdatalen > 0xFFFF {
+		return false
+	}
+	binary.BigEndian.PutUint16(msg[off:], uint16(rdatalen))
+	return true
+}
diff --git a/vendor/github.com/miekg/dns/reverse.go b/vendor/github.com/miekg/dns/reverse.go
new file mode 100644
index 0000000..f6e7a47
--- /dev/null
+++ b/vendor/github.com/miekg/dns/reverse.go
@@ -0,0 +1,38 @@
+package dns
+
+// StringToType is the reverse of TypeToString, needed for string parsing.
+var StringToType = reverseInt16(TypeToString)
+
+// StringToClass is the reverse of ClassToString, needed for string parsing.
+var StringToClass = reverseInt16(ClassToString)
+
+// StringToOpcode is a map of opcodes to strings.
+var StringToOpcode = reverseInt(OpcodeToString)
+
+// StringToRcode is a map of rcodes to strings.
+var StringToRcode = reverseInt(RcodeToString)
+
+// Reverse a map
+func reverseInt8(m map[uint8]string) map[string]uint8 {
+	n := make(map[string]uint8, len(m))
+	for u, s := range m {
+		n[s] = u
+	}
+	return n
+}
+
+func reverseInt16(m map[uint16]string) map[string]uint16 {
+	n := make(map[string]uint16, len(m))
+	for u, s := range m {
+		n[s] = u
+	}
+	return n
+}
+
+func reverseInt(m map[int]string) map[string]int {
+	n := make(map[string]int, len(m))
+	for u, s := range m {
+		n[s] = u
+	}
+	return n
+}
diff --git a/vendor/github.com/miekg/dns/sanitize.go b/vendor/github.com/miekg/dns/sanitize.go
new file mode 100644
index 0000000..c415bdd
--- /dev/null
+++ b/vendor/github.com/miekg/dns/sanitize.go
@@ -0,0 +1,84 @@
+package dns
+
+// Dedup removes identical RRs from rrs. It preserves the original ordering.
+// The lowest TTL of any duplicates is used in the remaining one. Dedup modifies
+// rrs.
+// m is used to store the RRs temporary. If it is nil a new map will be allocated.
+func Dedup(rrs []RR, m map[string]RR) []RR {
+	if m == nil {
+		m = make(map[string]RR)
+	}
+	// Save the keys, so we don't have to call normalizedString twice.
+	keys := make([]*string, 0, len(rrs))
+
+	for _, r := range rrs {
+		key := normalizedString(r)
+		keys = append(keys, &key)
+		if _, ok := m[key]; ok {
+			// Shortest TTL wins.
+			if m[key].Header().Ttl > r.Header().Ttl {
+				m[key].Header().Ttl = r.Header().Ttl
+			}
+			continue
+		}
+
+		m[key] = r
+	}
+	// If the length of the result map equals the amount of RRs we got,
+	// it means they were all different. We can then just return the original rrset.
+	if len(m) == len(rrs) {
+		return rrs
+	}
+
+	j := 0
+	for i, r := range rrs {
+		// If keys[i] lives in the map, we should copy and remove it.
+		if _, ok := m[*keys[i]]; ok {
+			delete(m, *keys[i])
+			rrs[j] = r
+			j++
+		}
+
+		if len(m) == 0 {
+			break
+		}
+	}
+
+	return rrs[:j]
+}
+
+// normalizedString returns a normalized string from r. The TTL
+// is removed and the domain name is lowercased. We go from this:
+// DomainName<TAB>TTL<TAB>CLASS<TAB>TYPE<TAB>RDATA to:
+// lowercasename<TAB>CLASS<TAB>TYPE...
+func normalizedString(r RR) string {
+	// A string Go DNS makes has: domainname<TAB>TTL<TAB>...
+	b := []byte(r.String())
+
+	// find the first non-escaped tab, then another, so we capture where the TTL lives.
+	esc := false
+	ttlStart, ttlEnd := 0, 0
+	for i := 0; i < len(b) && ttlEnd == 0; i++ {
+		switch {
+		case b[i] == '\\':
+			esc = !esc
+		case b[i] == '\t' && !esc:
+			if ttlStart == 0 {
+				ttlStart = i
+				continue
+			}
+			if ttlEnd == 0 {
+				ttlEnd = i
+			}
+		case b[i] >= 'A' && b[i] <= 'Z' && !esc:
+			b[i] += 32
+		default:
+			esc = false
+		}
+	}
+
+	// remove TTL.
+	copy(b[ttlStart:], b[ttlEnd:])
+	cut := ttlEnd - ttlStart
+	return string(b[:len(b)-cut])
+}
diff --git a/vendor/github.com/miekg/dns/scan.go b/vendor/github.com/miekg/dns/scan.go
new file mode 100644
index 0000000..f9cd474
--- /dev/null
+++ b/vendor/github.com/miekg/dns/scan.go
@@ -0,0 +1,1007 @@
+package dns
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+const maxTok = 2048 // Largest token we can return.
+const maxUint16 = 1<<16 - 1
+
+// Tokinize a RFC 1035 zone file. The tokenizer will normalize it:
+// * Add ownernames if they are left blank;
+// * Suppress sequences of spaces;
+// * Make each RR fit on one line (_NEWLINE is send as last)
+// * Handle comments: ;
+// * Handle braces - anywhere.
+const (
+	// Zonefile
+	zEOF = iota
+	zString
+	zBlank
+	zQuote
+	zNewline
+	zRrtpe
+	zOwner
+	zClass
+	zDirOrigin   // $ORIGIN
+	zDirTTL      // $TTL
+	zDirInclude  // $INCLUDE
+	zDirGenerate // $GENERATE
+
+	// Privatekey file
+	zValue
+	zKey
+
+	zExpectOwnerDir      // Ownername
+	zExpectOwnerBl       // Whitespace after the ownername
+	zExpectAny           // Expect rrtype, ttl or class
+	zExpectAnyNoClass    // Expect rrtype or ttl
+	zExpectAnyNoClassBl  // The whitespace after _EXPECT_ANY_NOCLASS
+	zExpectAnyNoTTL      // Expect rrtype or class
+	zExpectAnyNoTTLBl    // Whitespace after _EXPECT_ANY_NOTTL
+	zExpectRrtype        // Expect rrtype
+	zExpectRrtypeBl      // Whitespace BEFORE rrtype
+	zExpectRdata         // The first element of the rdata
+	zExpectDirTTLBl      // Space after directive $TTL
+	zExpectDirTTL        // Directive $TTL
+	zExpectDirOriginBl   // Space after directive $ORIGIN
+	zExpectDirOrigin     // Directive $ORIGIN
+	zExpectDirIncludeBl  // Space after directive $INCLUDE
+	zExpectDirInclude    // Directive $INCLUDE
+	zExpectDirGenerate   // Directive $GENERATE
+	zExpectDirGenerateBl // Space after directive $GENERATE
+)
+
+// ParseError is a parsing error. It contains the parse error and the location in the io.Reader
+// where the error occurred.
+type ParseError struct {
+	file string
+	err  string
+	lex  lex
+}
+
+func (e *ParseError) Error() (s string) {
+	if e.file != "" {
+		s = e.file + ": "
+	}
+	s += "dns: " + e.err + ": " + strconv.QuoteToASCII(e.lex.token) + " at line: " +
+		strconv.Itoa(e.lex.line) + ":" + strconv.Itoa(e.lex.column)
+	return
+}
+
+type lex struct {
+	token      string // text of the token
+	tokenUpper string // uppercase text of the token
+	length     int    // length of the token
+	err        bool   // when true, token text has lexer error
+	value      uint8  // value: zString, _BLANK, etc.
+	line       int    // line in the file
+	column     int    // column in the file
+	torc       uint16 // type or class as parsed in the lexer, we only need to look this up in the grammar
+	comment    string // any comment text seen
+}
+
+// Token holds the token that are returned when a zone file is parsed.
+type Token struct {
+	// The scanned resource record when error is not nil.
+	RR
+	// When an error occurred, this has the error specifics.
+	Error *ParseError
+	// A potential comment positioned after the RR and on the same line.
+	Comment string
+}
+
+// ttlState describes the state necessary to fill in an omitted RR TTL
+type ttlState struct {
+	ttl           uint32 // ttl is the current default TTL
+	isByDirective bool   // isByDirective indicates whether ttl was set by a $TTL directive
+}
+
+// NewRR reads the RR contained in the string s. Only the first RR is
+// returned. If s contains no RR, return nil with no error. The class
+// defaults to IN and TTL defaults to 3600. The full zone file syntax
+// like $TTL, $ORIGIN, etc. is supported. All fields of the returned
+// RR are set, except RR.Header().Rdlength which is set to 0.
+func NewRR(s string) (RR, error) {
+	if len(s) > 0 && s[len(s)-1] != '\n' { // We need a closing newline
+		return ReadRR(strings.NewReader(s+"\n"), "")
+	}
+	return ReadRR(strings.NewReader(s), "")
+}
+
+// ReadRR reads the RR contained in q.
+// See NewRR for more documentation.
+func ReadRR(q io.Reader, filename string) (RR, error) {
+	defttl := &ttlState{defaultTtl, false}
+	r := <-parseZoneHelper(q, ".", filename, defttl, 1)
+	if r == nil {
+		return nil, nil
+	}
+
+	if r.Error != nil {
+		return nil, r.Error
+	}
+	return r.RR, nil
+}
+
+// ParseZone reads a RFC 1035 style zonefile from r. It returns *Tokens on the
+// returned channel, each consisting of either a parsed RR and optional comment
+// or a nil RR and an error. The string file is only used
+// in error reporting. The string origin is used as the initial origin, as
+// if the file would start with an $ORIGIN directive.
+// The directives $INCLUDE, $ORIGIN, $TTL and $GENERATE are supported.
+// The channel t is closed by ParseZone when the end of r is reached.
+//
+// Basic usage pattern when reading from a string (z) containing the
+// zone data:
+//
+//	for x := range dns.ParseZone(strings.NewReader(z), "", "") {
+//		if x.Error != nil {
+//                  // log.Println(x.Error)
+//              } else {
+//                  // Do something with x.RR
+//              }
+//	}
+//
+// Comments specified after an RR (and on the same line!) are returned too:
+//
+//	foo. IN A 10.0.0.1 ; this is a comment
+//
+// The text "; this is comment" is returned in Token.Comment. Comments inside the
+// RR are discarded. Comments on a line by themselves are discarded too.
+func ParseZone(r io.Reader, origin, file string) chan *Token {
+	return parseZoneHelper(r, origin, file, nil, 10000)
+}
+
+func parseZoneHelper(r io.Reader, origin, file string, defttl *ttlState, chansize int) chan *Token {
+	t := make(chan *Token, chansize)
+	go parseZone(r, origin, file, defttl, t, 0)
+	return t
+}
+
+func parseZone(r io.Reader, origin, f string, defttl *ttlState, t chan *Token, include int) {
+	defer func() {
+		if include == 0 {
+			close(t)
+		}
+	}()
+	s, cancel := scanInit(r)
+	c := make(chan lex)
+	// Start the lexer
+	go zlexer(s, c)
+
+	defer func() {
+		cancel()
+		// zlexer can send up to three tokens, the next one and possibly 2 remainders.
+		// Do a non-blocking read.
+		_, ok := <-c
+		_, ok = <-c
+		_, ok = <-c
+		if !ok {
+			// too bad
+		}
+	}()
+	// 6 possible beginnings of a line, _ is a space
+	// 0. zRRTYPE                              -> all omitted until the rrtype
+	// 1. zOwner _ zRrtype                     -> class/ttl omitted
+	// 2. zOwner _ zString _ zRrtype           -> class omitted
+	// 3. zOwner _ zString _ zClass  _ zRrtype -> ttl/class
+	// 4. zOwner _ zClass  _ zRrtype           -> ttl omitted
+	// 5. zOwner _ zClass  _ zString _ zRrtype -> class/ttl (reversed)
+	// After detecting these, we know the zRrtype so we can jump to functions
+	// handling the rdata for each of these types.
+
+	if origin != "" {
+		origin = Fqdn(origin)
+		if _, ok := IsDomainName(origin); !ok {
+			t <- &Token{Error: &ParseError{f, "bad initial origin name", lex{}}}
+			return
+		}
+	}
+
+	st := zExpectOwnerDir // initial state
+	var h RR_Header
+	var prevName string
+	for l := range c {
+		// Lexer spotted an error already
+		if l.err == true {
+			t <- &Token{Error: &ParseError{f, l.token, l}}
+			return
+
+		}
+		switch st {
+		case zExpectOwnerDir:
+			// We can also expect a directive, like $TTL or $ORIGIN
+			if defttl != nil {
+				h.Ttl = defttl.ttl
+			}
+			h.Class = ClassINET
+			switch l.value {
+			case zNewline:
+				st = zExpectOwnerDir
+			case zOwner:
+				h.Name = l.token
+				name, ok := toAbsoluteName(l.token, origin)
+				if !ok {
+					t <- &Token{Error: &ParseError{f, "bad owner name", l}}
+					return
+				}
+				h.Name = name
+				prevName = h.Name
+				st = zExpectOwnerBl
+			case zDirTTL:
+				st = zExpectDirTTLBl
+			case zDirOrigin:
+				st = zExpectDirOriginBl
+			case zDirInclude:
+				st = zExpectDirIncludeBl
+			case zDirGenerate:
+				st = zExpectDirGenerateBl
+			case zRrtpe:
+				h.Name = prevName
+				h.Rrtype = l.torc
+				st = zExpectRdata
+			case zClass:
+				h.Name = prevName
+				h.Class = l.torc
+				st = zExpectAnyNoClassBl
+			case zBlank:
+				// Discard, can happen when there is nothing on the
+				// line except the RR type
+			case zString:
+				ttl, ok := stringToTTL(l.token)
+				if !ok {
+					t <- &Token{Error: &ParseError{f, "not a TTL", l}}
+					return
+				}
+				h.Ttl = ttl
+				if defttl == nil || !defttl.isByDirective {
+					defttl = &ttlState{ttl, false}
+				}
+				st = zExpectAnyNoTTLBl
+
+			default:
+				t <- &Token{Error: &ParseError{f, "syntax error at beginning", l}}
+				return
+			}
+		case zExpectDirIncludeBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank after $INCLUDE-directive", l}}
+				return
+			}
+			st = zExpectDirInclude
+		case zExpectDirInclude:
+			if l.value != zString {
+				t <- &Token{Error: &ParseError{f, "expecting $INCLUDE value, not this...", l}}
+				return
+			}
+			neworigin := origin // There may be optionally a new origin set after the filename, if not use current one
+			switch l := <-c; l.value {
+			case zBlank:
+				l := <-c
+				if l.value == zString {
+					name, ok := toAbsoluteName(l.token, origin)
+					if !ok {
+						t <- &Token{Error: &ParseError{f, "bad origin name", l}}
+						return
+					}
+					neworigin = name
+				}
+			case zNewline, zEOF:
+				// Ok
+			default:
+				t <- &Token{Error: &ParseError{f, "garbage after $INCLUDE", l}}
+				return
+			}
+			// Start with the new file
+			includePath := l.token
+			if !filepath.IsAbs(includePath) {
+				includePath = filepath.Join(filepath.Dir(f), includePath)
+			}
+			r1, e1 := os.Open(includePath)
+			if e1 != nil {
+				msg := fmt.Sprintf("failed to open `%s'", l.token)
+				if !filepath.IsAbs(l.token) {
+					msg += fmt.Sprintf(" as `%s'", includePath)
+				}
+				t <- &Token{Error: &ParseError{f, msg, l}}
+				return
+			}
+			if include+1 > 7 {
+				t <- &Token{Error: &ParseError{f, "too deeply nested $INCLUDE", l}}
+				return
+			}
+			parseZone(r1, neworigin, includePath, defttl, t, include+1)
+			st = zExpectOwnerDir
+		case zExpectDirTTLBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank after $TTL-directive", l}}
+				return
+			}
+			st = zExpectDirTTL
+		case zExpectDirTTL:
+			if l.value != zString {
+				t <- &Token{Error: &ParseError{f, "expecting $TTL value, not this...", l}}
+				return
+			}
+			if e, _ := slurpRemainder(c, f); e != nil {
+				t <- &Token{Error: e}
+				return
+			}
+			ttl, ok := stringToTTL(l.token)
+			if !ok {
+				t <- &Token{Error: &ParseError{f, "expecting $TTL value, not this...", l}}
+				return
+			}
+			defttl = &ttlState{ttl, true}
+			st = zExpectOwnerDir
+		case zExpectDirOriginBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank after $ORIGIN-directive", l}}
+				return
+			}
+			st = zExpectDirOrigin
+		case zExpectDirOrigin:
+			if l.value != zString {
+				t <- &Token{Error: &ParseError{f, "expecting $ORIGIN value, not this...", l}}
+				return
+			}
+			if e, _ := slurpRemainder(c, f); e != nil {
+				t <- &Token{Error: e}
+			}
+			name, ok := toAbsoluteName(l.token, origin)
+			if !ok {
+				t <- &Token{Error: &ParseError{f, "bad origin name", l}}
+				return
+			}
+			origin = name
+			st = zExpectOwnerDir
+		case zExpectDirGenerateBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank after $GENERATE-directive", l}}
+				return
+			}
+			st = zExpectDirGenerate
+		case zExpectDirGenerate:
+			if l.value != zString {
+				t <- &Token{Error: &ParseError{f, "expecting $GENERATE value, not this...", l}}
+				return
+			}
+			if errMsg := generate(l, c, t, origin); errMsg != "" {
+				t <- &Token{Error: &ParseError{f, errMsg, l}}
+				return
+			}
+			st = zExpectOwnerDir
+		case zExpectOwnerBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank after owner", l}}
+				return
+			}
+			st = zExpectAny
+		case zExpectAny:
+			switch l.value {
+			case zRrtpe:
+				if defttl == nil {
+					t <- &Token{Error: &ParseError{f, "missing TTL with no previous value", l}}
+					return
+				}
+				h.Rrtype = l.torc
+				st = zExpectRdata
+			case zClass:
+				h.Class = l.torc
+				st = zExpectAnyNoClassBl
+			case zString:
+				ttl, ok := stringToTTL(l.token)
+				if !ok {
+					t <- &Token{Error: &ParseError{f, "not a TTL", l}}
+					return
+				}
+				h.Ttl = ttl
+				if defttl == nil || !defttl.isByDirective {
+					defttl = &ttlState{ttl, false}
+				}
+				st = zExpectAnyNoTTLBl
+			default:
+				t <- &Token{Error: &ParseError{f, "expecting RR type, TTL or class, not this...", l}}
+				return
+			}
+		case zExpectAnyNoClassBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank before class", l}}
+				return
+			}
+			st = zExpectAnyNoClass
+		case zExpectAnyNoTTLBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank before TTL", l}}
+				return
+			}
+			st = zExpectAnyNoTTL
+		case zExpectAnyNoTTL:
+			switch l.value {
+			case zClass:
+				h.Class = l.torc
+				st = zExpectRrtypeBl
+			case zRrtpe:
+				h.Rrtype = l.torc
+				st = zExpectRdata
+			default:
+				t <- &Token{Error: &ParseError{f, "expecting RR type or class, not this...", l}}
+				return
+			}
+		case zExpectAnyNoClass:
+			switch l.value {
+			case zString:
+				ttl, ok := stringToTTL(l.token)
+				if !ok {
+					t <- &Token{Error: &ParseError{f, "not a TTL", l}}
+					return
+				}
+				h.Ttl = ttl
+				if defttl == nil || !defttl.isByDirective {
+					defttl = &ttlState{ttl, false}
+				}
+				st = zExpectRrtypeBl
+			case zRrtpe:
+				h.Rrtype = l.torc
+				st = zExpectRdata
+			default:
+				t <- &Token{Error: &ParseError{f, "expecting RR type or TTL, not this...", l}}
+				return
+			}
+		case zExpectRrtypeBl:
+			if l.value != zBlank {
+				t <- &Token{Error: &ParseError{f, "no blank before RR type", l}}
+				return
+			}
+			st = zExpectRrtype
+		case zExpectRrtype:
+			if l.value != zRrtpe {
+				t <- &Token{Error: &ParseError{f, "unknown RR type", l}}
+				return
+			}
+			h.Rrtype = l.torc
+			st = zExpectRdata
+		case zExpectRdata:
+			r, e, c1 := setRR(h, c, origin, f)
+			if e != nil {
+				// If e.lex is nil than we have encounter a unknown RR type
+				// in that case we substitute our current lex token
+				if e.lex.token == "" && e.lex.value == 0 {
+					e.lex = l // Uh, dirty
+				}
+				t <- &Token{Error: e}
+				return
+			}
+			t <- &Token{RR: r, Comment: c1}
+			st = zExpectOwnerDir
+		}
+	}
+	// If we get here, we and the h.Rrtype is still zero, we haven't parsed anything, this
+	// is not an error, because an empty zone file is still a zone file.
+}
+
+// zlexer scans the sourcefile and returns tokens on the channel c.
+func zlexer(s *scan, c chan lex) {
+	var l lex
+	str := make([]byte, maxTok) // Should be enough for any token
+	stri := 0                   // Offset in str (0 means empty)
+	com := make([]byte, maxTok) // Hold comment text
+	comi := 0
+	quote := false
+	escape := false
+	space := false
+	commt := false
+	rrtype := false
+	owner := true
+	brace := 0
+	x, err := s.tokenText()
+	defer close(c)
+	for err == nil {
+		l.column = s.position.Column
+		l.line = s.position.Line
+		if stri >= maxTok {
+			l.token = "token length insufficient for parsing"
+			l.err = true
+			c <- l
+			return
+		}
+		if comi >= maxTok {
+			l.token = "comment length insufficient for parsing"
+			l.err = true
+			c <- l
+			return
+		}
+
+		switch x {
+		case ' ', '\t':
+			if escape {
+				escape = false
+				str[stri] = x
+				stri++
+				break
+			}
+			if quote {
+				// Inside quotes this is legal
+				str[stri] = x
+				stri++
+				break
+			}
+			if commt {
+				com[comi] = x
+				comi++
+				break
+			}
+			if stri == 0 {
+				// Space directly in the beginning, handled in the grammar
+			} else if owner {
+				// If we have a string and its the first, make it an owner
+				l.value = zOwner
+				l.token = string(str[:stri])
+				l.tokenUpper = strings.ToUpper(l.token)
+				l.length = stri
+				// escape $... start with a \ not a $, so this will work
+				switch l.tokenUpper {
+				case "$TTL":
+					l.value = zDirTTL
+				case "$ORIGIN":
+					l.value = zDirOrigin
+				case "$INCLUDE":
+					l.value = zDirInclude
+				case "$GENERATE":
+					l.value = zDirGenerate
+				}
+				c <- l
+			} else {
+				l.value = zString
+				l.token = string(str[:stri])
+				l.tokenUpper = strings.ToUpper(l.token)
+				l.length = stri
+				if !rrtype {
+					if t, ok := StringToType[l.tokenUpper]; ok {
+						l.value = zRrtpe
+						l.torc = t
+						rrtype = true
+					} else {
+						if strings.HasPrefix(l.tokenUpper, "TYPE") {
+							t, ok := typeToInt(l.token)
+							if !ok {
+								l.token = "unknown RR type"
+								l.err = true
+								c <- l
+								return
+							}
+							l.value = zRrtpe
+							rrtype = true
+							l.torc = t
+						}
+					}
+					if t, ok := StringToClass[l.tokenUpper]; ok {
+						l.value = zClass
+						l.torc = t
+					} else {
+						if strings.HasPrefix(l.tokenUpper, "CLASS") {
+							t, ok := classToInt(l.token)
+							if !ok {
+								l.token = "unknown class"
+								l.err = true
+								c <- l
+								return
+							}
+							l.value = zClass
+							l.torc = t
+						}
+					}
+				}
+				c <- l
+			}
+			stri = 0
+
+			if !space && !commt {
+				l.value = zBlank
+				l.token = " "
+				l.length = 1
+				c <- l
+			}
+			owner = false
+			space = true
+		case ';':
+			if escape {
+				escape = false
+				str[stri] = x
+				stri++
+				break
+			}
+			if quote {
+				// Inside quotes this is legal
+				str[stri] = x
+				stri++
+				break
+			}
+			if stri > 0 {
+				l.value = zString
+				l.token = string(str[:stri])
+				l.tokenUpper = strings.ToUpper(l.token)
+				l.length = stri
+				c <- l
+				stri = 0
+			}
+			commt = true
+			com[comi] = ';'
+			comi++
+		case '\r':
+			escape = false
+			if quote {
+				str[stri] = x
+				stri++
+				break
+			}
+			// discard if outside of quotes
+		case '\n':
+			escape = false
+			// Escaped newline
+			if quote {
+				str[stri] = x
+				stri++
+				break
+			}
+			// inside quotes this is legal
+			if commt {
+				// Reset a comment
+				commt = false
+				rrtype = false
+				stri = 0
+				// If not in a brace this ends the comment AND the RR
+				if brace == 0 {
+					owner = true
+					owner = true
+					l.value = zNewline
+					l.token = "\n"
+					l.tokenUpper = l.token
+					l.length = 1
+					l.comment = string(com[:comi])
+					c <- l
+					l.comment = ""
+					comi = 0
+					break
+				}
+				com[comi] = ' ' // convert newline to space
+				comi++
+				break
+			}
+
+			if brace == 0 {
+				// If there is previous text, we should output it here
+				if stri != 0 {
+					l.value = zString
+					l.token = string(str[:stri])
+					l.tokenUpper = strings.ToUpper(l.token)
+
+					l.length = stri
+					if !rrtype {
+						if t, ok := StringToType[l.tokenUpper]; ok {
+							l.value = zRrtpe
+							l.torc = t
+							rrtype = true
+						}
+					}
+					c <- l
+				}
+				l.value = zNewline
+				l.token = "\n"
+				l.tokenUpper = l.token
+				l.length = 1
+				c <- l
+				stri = 0
+				commt = false
+				rrtype = false
+				owner = true
+				comi = 0
+			}
+		case '\\':
+			// comments do not get escaped chars, everything is copied
+			if commt {
+				com[comi] = x
+				comi++
+				break
+			}
+			// something already escaped must be in string
+			if escape {
+				str[stri] = x
+				stri++
+				escape = false
+				break
+			}
+			// something escaped outside of string gets added to string
+			str[stri] = x
+			stri++
+			escape = true
+		case '"':
+			if commt {
+				com[comi] = x
+				comi++
+				break
+			}
+			if escape {
+				str[stri] = x
+				stri++
+				escape = false
+				break
+			}
+			space = false
+			// send previous gathered text and the quote
+			if stri != 0 {
+				l.value = zString
+				l.token = string(str[:stri])
+				l.tokenUpper = strings.ToUpper(l.token)
+				l.length = stri
+
+				c <- l
+				stri = 0
+			}
+
+			// send quote itself as separate token
+			l.value = zQuote
+			l.token = "\""
+			l.tokenUpper = l.token
+			l.length = 1
+			c <- l
+			quote = !quote
+		case '(', ')':
+			if commt {
+				com[comi] = x
+				comi++
+				break
+			}
+			if escape {
+				str[stri] = x
+				stri++
+				escape = false
+				break
+			}
+			if quote {
+				str[stri] = x
+				stri++
+				break
+			}
+			switch x {
+			case ')':
+				brace--
+				if brace < 0 {
+					l.token = "extra closing brace"
+					l.tokenUpper = l.token
+					l.err = true
+					c <- l
+					return
+				}
+			case '(':
+				brace++
+			}
+		default:
+			escape = false
+			if commt {
+				com[comi] = x
+				comi++
+				break
+			}
+			str[stri] = x
+			stri++
+			space = false
+		}
+		x, err = s.tokenText()
+	}
+	if stri > 0 {
+		// Send remainder
+		l.token = string(str[:stri])
+		l.tokenUpper = strings.ToUpper(l.token)
+		l.length = stri
+		l.value = zString
+		c <- l
+	}
+	if brace != 0 {
+		l.token = "unbalanced brace"
+		l.tokenUpper = l.token
+		l.err = true
+		c <- l
+	}
+}
+
+// Extract the class number from CLASSxx
+func classToInt(token string) (uint16, bool) {
+	offset := 5
+	if len(token) < offset+1 {
+		return 0, false
+	}
+	class, err := strconv.ParseUint(token[offset:], 10, 16)
+	if err != nil {
+		return 0, false
+	}
+	return uint16(class), true
+}
+
+// Extract the rr number from TYPExxx
+func typeToInt(token string) (uint16, bool) {
+	offset := 4
+	if len(token) < offset+1 {
+		return 0, false
+	}
+	typ, err := strconv.ParseUint(token[offset:], 10, 16)
+	if err != nil {
+		return 0, false
+	}
+	return uint16(typ), true
+}
+
+// stringToTTL parses things like 2w, 2m, etc, and returns the time in seconds.
+func stringToTTL(token string) (uint32, bool) {
+	s := uint32(0)
+	i := uint32(0)
+	for _, c := range token {
+		switch c {
+		case 's', 'S':
+			s += i
+			i = 0
+		case 'm', 'M':
+			s += i * 60
+			i = 0
+		case 'h', 'H':
+			s += i * 60 * 60
+			i = 0
+		case 'd', 'D':
+			s += i * 60 * 60 * 24
+			i = 0
+		case 'w', 'W':
+			s += i * 60 * 60 * 24 * 7
+			i = 0
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			i *= 10
+			i += uint32(c) - '0'
+		default:
+			return 0, false
+		}
+	}
+	return s + i, true
+}
+
+// Parse LOC records' <digits>[.<digits>][mM] into a
+// mantissa exponent format. Token should contain the entire
+// string (i.e. no spaces allowed)
+func stringToCm(token string) (e, m uint8, ok bool) {
+	if token[len(token)-1] == 'M' || token[len(token)-1] == 'm' {
+		token = token[0 : len(token)-1]
+	}
+	s := strings.SplitN(token, ".", 2)
+	var meters, cmeters, val int
+	var err error
+	switch len(s) {
+	case 2:
+		if cmeters, err = strconv.Atoi(s[1]); err != nil {
+			return
+		}
+		fallthrough
+	case 1:
+		if meters, err = strconv.Atoi(s[0]); err != nil {
+			return
+		}
+	case 0:
+		// huh?
+		return 0, 0, false
+	}
+	ok = true
+	if meters > 0 {
+		e = 2
+		val = meters
+	} else {
+		e = 0
+		val = cmeters
+	}
+	for val > 10 {
+		e++
+		val /= 10
+	}
+	if e > 9 {
+		ok = false
+	}
+	m = uint8(val)
+	return
+}
+
+func toAbsoluteName(name, origin string) (absolute string, ok bool) {
+	// check for an explicit origin reference
+	if name == "@" {
+		// require a nonempty origin
+		if origin == "" {
+			return "", false
+		}
+		return origin, true
+	}
+
+	// require a valid domain name
+	_, ok = IsDomainName(name)
+	if !ok || name == "" {
+		return "", false
+	}
+
+	// check if name is already absolute
+	if name[len(name)-1] == '.' {
+		return name, true
+	}
+
+	// require a nonempty origin
+	if origin == "" {
+		return "", false
+	}
+	return appendOrigin(name, origin), true
+}
+
+func appendOrigin(name, origin string) string {
+	if origin == "." {
+		return name + origin
+	}
+	return name + "." + origin
+}
+
+// LOC record helper function
+func locCheckNorth(token string, latitude uint32) (uint32, bool) {
+	switch token {
+	case "n", "N":
+		return LOC_EQUATOR + latitude, true
+	case "s", "S":
+		return LOC_EQUATOR - latitude, true
+	}
+	return latitude, false
+}
+
+// LOC record helper function
+func locCheckEast(token string, longitude uint32) (uint32, bool) {
+	switch token {
+	case "e", "E":
+		return LOC_EQUATOR + longitude, true
+	case "w", "W":
+		return LOC_EQUATOR - longitude, true
+	}
+	return longitude, false
+}
+
+// "Eat" the rest of the "line". Return potential comments
+func slurpRemainder(c chan lex, f string) (*ParseError, string) {
+	l := <-c
+	com := ""
+	switch l.value {
+	case zBlank:
+		l = <-c
+		com = l.comment
+		if l.value != zNewline && l.value != zEOF {
+			return &ParseError{f, "garbage after rdata", l}, ""
+		}
+	case zNewline:
+		com = l.comment
+	case zEOF:
+	default:
+		return &ParseError{f, "garbage after rdata", l}, ""
+	}
+	return nil, com
+}
+
+// Parse a 64 bit-like ipv6 address: "0014:4fff:ff20:ee64"
+// Used for NID and L64 record.
+func stringToNodeID(l lex) (uint64, *ParseError) {
+	if len(l.token) < 19 {
+		return 0, &ParseError{l.token, "bad NID/L64 NodeID/Locator64", l}
+	}
+	// There must be three colons at fixes postitions, if not its a parse error
+	if l.token[4] != ':' && l.token[9] != ':' && l.token[14] != ':' {
+		return 0, &ParseError{l.token, "bad NID/L64 NodeID/Locator64", l}
+	}
+	s := l.token[0:4] + l.token[5:9] + l.token[10:14] + l.token[15:19]
+	u, err := strconv.ParseUint(s, 16, 64)
+	if err != nil {
+		return 0, &ParseError{l.token, "bad NID/L64 NodeID/Locator64", l}
+	}
+	return u, nil
+}
diff --git a/vendor/github.com/miekg/dns/scan_rr.go b/vendor/github.com/miekg/dns/scan_rr.go
new file mode 100644
index 0000000..f4ccc84
--- /dev/null
+++ b/vendor/github.com/miekg/dns/scan_rr.go
@@ -0,0 +1,2199 @@
+package dns
+
+import (
+	"encoding/base64"
+	"net"
+	"strconv"
+	"strings"
+)
+
+type parserFunc struct {
+	// Func defines the function that parses the tokens and returns the RR
+	// or an error. The last string contains any comments in the line as
+	// they returned by the lexer as well.
+	Func func(h RR_Header, c chan lex, origin string, file string) (RR, *ParseError, string)
+	// Signals if the RR ending is of variable length, like TXT or records
+	// that have Hexadecimal or Base64 as their last element in the Rdata. Records
+	// that have a fixed ending or for instance A, AAAA, SOA and etc.
+	Variable bool
+}
+
+// Parse the rdata of each rrtype.
+// All data from the channel c is either zString or zBlank.
+// After the rdata there may come a zBlank and then a zNewline
+// or immediately a zNewline. If this is not the case we flag
+// an *ParseError: garbage after rdata.
+func setRR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	parserfunc, ok := typeToparserFunc[h.Rrtype]
+	if ok {
+		r, e, cm := parserfunc.Func(h, c, o, f)
+		if parserfunc.Variable {
+			return r, e, cm
+		}
+		if e != nil {
+			return nil, e, ""
+		}
+		e, cm = slurpRemainder(c, f)
+		if e != nil {
+			return nil, e, ""
+		}
+		return r, nil, cm
+	}
+	// RFC3957 RR (Unknown RR handling)
+	return setRFC3597(h, c, o, f)
+}
+
+// A remainder of the rdata with embedded spaces, return the parsed string (sans the spaces)
+// or an error
+func endingToString(c chan lex, errstr, f string) (string, *ParseError, string) {
+	s := ""
+	l := <-c // zString
+	for l.value != zNewline && l.value != zEOF {
+		if l.err {
+			return s, &ParseError{f, errstr, l}, ""
+		}
+		switch l.value {
+		case zString:
+			s += l.token
+		case zBlank: // Ok
+		default:
+			return "", &ParseError{f, errstr, l}, ""
+		}
+		l = <-c
+	}
+	return s, nil, l.comment
+}
+
+// A remainder of the rdata with embedded spaces, split on unquoted whitespace
+// and return the parsed string slice or an error
+func endingToTxtSlice(c chan lex, errstr, f string) ([]string, *ParseError, string) {
+	// Get the remaining data until we see a zNewline
+	l := <-c
+	if l.err {
+		return nil, &ParseError{f, errstr, l}, ""
+	}
+
+	// Build the slice
+	s := make([]string, 0)
+	quote := false
+	empty := false
+	for l.value != zNewline && l.value != zEOF {
+		if l.err {
+			return nil, &ParseError{f, errstr, l}, ""
+		}
+		switch l.value {
+		case zString:
+			empty = false
+			if len(l.token) > 255 {
+				// split up tokens that are larger than 255 into 255-chunks
+				sx := []string{}
+				p, i := 0, 255
+				for {
+					if i <= len(l.token) {
+						sx = append(sx, l.token[p:i])
+					} else {
+						sx = append(sx, l.token[p:])
+						break
+
+					}
+					p, i = p+255, i+255
+				}
+				s = append(s, sx...)
+				break
+			}
+
+			s = append(s, l.token)
+		case zBlank:
+			if quote {
+				// zBlank can only be seen in between txt parts.
+				return nil, &ParseError{f, errstr, l}, ""
+			}
+		case zQuote:
+			if empty && quote {
+				s = append(s, "")
+			}
+			quote = !quote
+			empty = true
+		default:
+			return nil, &ParseError{f, errstr, l}, ""
+		}
+		l = <-c
+	}
+	if quote {
+		return nil, &ParseError{f, errstr, l}, ""
+	}
+	return s, nil, l.comment
+}
+
+func setA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(A)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	rr.A = net.ParseIP(l.token)
+	if rr.A == nil || l.err {
+		return nil, &ParseError{f, "bad A A", l}, ""
+	}
+	return rr, nil, ""
+}
+
+func setAAAA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(AAAA)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	rr.AAAA = net.ParseIP(l.token)
+	if rr.AAAA == nil || l.err {
+		return nil, &ParseError{f, "bad AAAA AAAA", l}, ""
+	}
+	return rr, nil, ""
+}
+
+func setNS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NS)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Ns = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad NS Ns", l}, ""
+	}
+	rr.Ns = name
+	return rr, nil, ""
+}
+
+func setPTR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(PTR)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Ptr = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad PTR Ptr", l}, ""
+	}
+	rr.Ptr = name
+	return rr, nil, ""
+}
+
+func setNSAPPTR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NSAPPTR)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Ptr = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad NSAP-PTR Ptr", l}, ""
+	}
+	rr.Ptr = name
+	return rr, nil, ""
+}
+
+func setRP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(RP)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Mbox = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	mbox, mboxOk := toAbsoluteName(l.token, o)
+	if l.err || !mboxOk {
+		return nil, &ParseError{f, "bad RP Mbox", l}, ""
+	}
+	rr.Mbox = mbox
+
+	<-c // zBlank
+	l = <-c
+	rr.Txt = l.token
+
+	txt, txtOk := toAbsoluteName(l.token, o)
+	if l.err || !txtOk {
+		return nil, &ParseError{f, "bad RP Txt", l}, ""
+	}
+	rr.Txt = txt
+
+	return rr, nil, ""
+}
+
+func setMR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MR)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Mr = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad MR Mr", l}, ""
+	}
+	rr.Mr = name
+	return rr, nil, ""
+}
+
+func setMB(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MB)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Mb = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad MB Mb", l}, ""
+	}
+	rr.Mb = name
+	return rr, nil, ""
+}
+
+func setMG(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MG)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Mg = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad MG Mg", l}, ""
+	}
+	rr.Mg = name
+	return rr, nil, ""
+}
+
+func setHINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(HINFO)
+	rr.Hdr = h
+
+	chunks, e, c1 := endingToTxtSlice(c, "bad HINFO Fields", f)
+	if e != nil {
+		return nil, e, c1
+	}
+
+	if ln := len(chunks); ln == 0 {
+		return rr, nil, ""
+	} else if ln == 1 {
+		// Can we split it?
+		if out := strings.Fields(chunks[0]); len(out) > 1 {
+			chunks = out
+		} else {
+			chunks = append(chunks, "")
+		}
+	}
+
+	rr.Cpu = chunks[0]
+	rr.Os = strings.Join(chunks[1:], " ")
+
+	return rr, nil, ""
+}
+
+func setMINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MINFO)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Rmail = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	rmail, rmailOk := toAbsoluteName(l.token, o)
+	if l.err || !rmailOk {
+		return nil, &ParseError{f, "bad MINFO Rmail", l}, ""
+	}
+	rr.Rmail = rmail
+
+	<-c // zBlank
+	l = <-c
+	rr.Email = l.token
+
+	email, emailOk := toAbsoluteName(l.token, o)
+	if l.err || !emailOk {
+		return nil, &ParseError{f, "bad MINFO Email", l}, ""
+	}
+	rr.Email = email
+
+	return rr, nil, ""
+}
+
+func setMF(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MF)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Mf = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad MF Mf", l}, ""
+	}
+	rr.Mf = name
+	return rr, nil, ""
+}
+
+func setMD(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MD)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Md = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad MD Md", l}, ""
+	}
+	rr.Md = name
+	return rr, nil, ""
+}
+
+func setMX(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(MX)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad MX Pref", l}, ""
+	}
+	rr.Preference = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Mx = l.token
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad MX Mx", l}, ""
+	}
+	rr.Mx = name
+
+	return rr, nil, ""
+}
+
+func setRT(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(RT)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil {
+		return nil, &ParseError{f, "bad RT Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Host = l.token
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad RT Host", l}, ""
+	}
+	rr.Host = name
+
+	return rr, nil, ""
+}
+
+func setAFSDB(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(AFSDB)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad AFSDB Subtype", l}, ""
+	}
+	rr.Subtype = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Hostname = l.token
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad AFSDB Hostname", l}, ""
+	}
+	rr.Hostname = name
+	return rr, nil, ""
+}
+
+func setX25(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(X25)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	if l.err {
+		return nil, &ParseError{f, "bad X25 PSDNAddress", l}, ""
+	}
+	rr.PSDNAddress = l.token
+	return rr, nil, ""
+}
+
+func setKX(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(KX)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad KX Pref", l}, ""
+	}
+	rr.Preference = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Exchanger = l.token
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad KX Exchanger", l}, ""
+	}
+	rr.Exchanger = name
+	return rr, nil, ""
+}
+
+func setCNAME(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(CNAME)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Target = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad CNAME Target", l}, ""
+	}
+	rr.Target = name
+	return rr, nil, ""
+}
+
+func setDNAME(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(DNAME)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Target = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad DNAME Target", l}, ""
+	}
+	rr.Target = name
+	return rr, nil, ""
+}
+
+func setSOA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(SOA)
+	rr.Hdr = h
+
+	l := <-c
+	rr.Ns = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	ns, nsOk := toAbsoluteName(l.token, o)
+	if l.err || !nsOk {
+		return nil, &ParseError{f, "bad SOA Ns", l}, ""
+	}
+	rr.Ns = ns
+
+	<-c // zBlank
+	l = <-c
+	rr.Mbox = l.token
+
+	mbox, mboxOk := toAbsoluteName(l.token, o)
+	if l.err || !mboxOk {
+		return nil, &ParseError{f, "bad SOA Mbox", l}, ""
+	}
+	rr.Mbox = mbox
+
+	<-c // zBlank
+
+	var (
+		v  uint32
+		ok bool
+	)
+	for i := 0; i < 5; i++ {
+		l = <-c
+		if l.err {
+			return nil, &ParseError{f, "bad SOA zone parameter", l}, ""
+		}
+		if j, e := strconv.ParseUint(l.token, 10, 32); e != nil {
+			if i == 0 {
+				// Serial must be a number
+				return nil, &ParseError{f, "bad SOA zone parameter", l}, ""
+			}
+			// We allow other fields to be unitful duration strings
+			if v, ok = stringToTTL(l.token); !ok {
+				return nil, &ParseError{f, "bad SOA zone parameter", l}, ""
+
+			}
+		} else {
+			v = uint32(j)
+		}
+		switch i {
+		case 0:
+			rr.Serial = v
+			<-c // zBlank
+		case 1:
+			rr.Refresh = v
+			<-c // zBlank
+		case 2:
+			rr.Retry = v
+			<-c // zBlank
+		case 3:
+			rr.Expire = v
+			<-c // zBlank
+		case 4:
+			rr.Minttl = v
+		}
+	}
+	return rr, nil, ""
+}
+
+func setSRV(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(SRV)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SRV Priority", l}, ""
+	}
+	rr.Priority = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SRV Weight", l}, ""
+	}
+	rr.Weight = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SRV Port", l}, ""
+	}
+	rr.Port = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Target = l.token
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad SRV Target", l}, ""
+	}
+	rr.Target = name
+	return rr, nil, ""
+}
+
+func setNAPTR(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NAPTR)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NAPTR Order", l}, ""
+	}
+	rr.Order = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NAPTR Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+
+	// Flags
+	<-c     // zBlank
+	l = <-c // _QUOTE
+	if l.value != zQuote {
+		return nil, &ParseError{f, "bad NAPTR Flags", l}, ""
+	}
+	l = <-c // Either String or Quote
+	if l.value == zString {
+		rr.Flags = l.token
+		l = <-c // _QUOTE
+		if l.value != zQuote {
+			return nil, &ParseError{f, "bad NAPTR Flags", l}, ""
+		}
+	} else if l.value == zQuote {
+		rr.Flags = ""
+	} else {
+		return nil, &ParseError{f, "bad NAPTR Flags", l}, ""
+	}
+
+	// Service
+	<-c     // zBlank
+	l = <-c // _QUOTE
+	if l.value != zQuote {
+		return nil, &ParseError{f, "bad NAPTR Service", l}, ""
+	}
+	l = <-c // Either String or Quote
+	if l.value == zString {
+		rr.Service = l.token
+		l = <-c // _QUOTE
+		if l.value != zQuote {
+			return nil, &ParseError{f, "bad NAPTR Service", l}, ""
+		}
+	} else if l.value == zQuote {
+		rr.Service = ""
+	} else {
+		return nil, &ParseError{f, "bad NAPTR Service", l}, ""
+	}
+
+	// Regexp
+	<-c     // zBlank
+	l = <-c // _QUOTE
+	if l.value != zQuote {
+		return nil, &ParseError{f, "bad NAPTR Regexp", l}, ""
+	}
+	l = <-c // Either String or Quote
+	if l.value == zString {
+		rr.Regexp = l.token
+		l = <-c // _QUOTE
+		if l.value != zQuote {
+			return nil, &ParseError{f, "bad NAPTR Regexp", l}, ""
+		}
+	} else if l.value == zQuote {
+		rr.Regexp = ""
+	} else {
+		return nil, &ParseError{f, "bad NAPTR Regexp", l}, ""
+	}
+
+	// After quote no space??
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Replacement = l.token
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad NAPTR Replacement", l}, ""
+	}
+	rr.Replacement = name
+	return rr, nil, ""
+}
+
+func setTALINK(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(TALINK)
+	rr.Hdr = h
+
+	l := <-c
+	rr.PreviousName = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	previousName, previousNameOk := toAbsoluteName(l.token, o)
+	if l.err || !previousNameOk {
+		return nil, &ParseError{f, "bad TALINK PreviousName", l}, ""
+	}
+	rr.PreviousName = previousName
+
+	<-c // zBlank
+	l = <-c
+	rr.NextName = l.token
+
+	nextName, nextNameOk := toAbsoluteName(l.token, o)
+	if l.err || !nextNameOk {
+		return nil, &ParseError{f, "bad TALINK NextName", l}, ""
+	}
+	rr.NextName = nextName
+
+	return rr, nil, ""
+}
+
+func setLOC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(LOC)
+	rr.Hdr = h
+	// Non zero defaults for LOC record, see RFC 1876, Section 3.
+	rr.HorizPre = 165 // 10000
+	rr.VertPre = 162  // 10
+	rr.Size = 18      // 1
+	ok := false
+
+	// North
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+	i, e := strconv.ParseUint(l.token, 10, 32)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad LOC Latitude", l}, ""
+	}
+	rr.Latitude = 1000 * 60 * 60 * uint32(i)
+
+	<-c // zBlank
+	// Either number, 'N' or 'S'
+	l = <-c
+	if rr.Latitude, ok = locCheckNorth(l.token, rr.Latitude); ok {
+		goto East
+	}
+	i, e = strconv.ParseUint(l.token, 10, 32)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad LOC Latitude minutes", l}, ""
+	}
+	rr.Latitude += 1000 * 60 * uint32(i)
+
+	<-c // zBlank
+	l = <-c
+	if i, e := strconv.ParseFloat(l.token, 32); e != nil || l.err {
+		return nil, &ParseError{f, "bad LOC Latitude seconds", l}, ""
+	} else {
+		rr.Latitude += uint32(1000 * i)
+	}
+	<-c // zBlank
+	// Either number, 'N' or 'S'
+	l = <-c
+	if rr.Latitude, ok = locCheckNorth(l.token, rr.Latitude); ok {
+		goto East
+	}
+	// If still alive, flag an error
+	return nil, &ParseError{f, "bad LOC Latitude North/South", l}, ""
+
+East:
+	// East
+	<-c // zBlank
+	l = <-c
+	if i, e := strconv.ParseUint(l.token, 10, 32); e != nil || l.err {
+		return nil, &ParseError{f, "bad LOC Longitude", l}, ""
+	} else {
+		rr.Longitude = 1000 * 60 * 60 * uint32(i)
+	}
+	<-c // zBlank
+	// Either number, 'E' or 'W'
+	l = <-c
+	if rr.Longitude, ok = locCheckEast(l.token, rr.Longitude); ok {
+		goto Altitude
+	}
+	if i, e := strconv.ParseUint(l.token, 10, 32); e != nil || l.err {
+		return nil, &ParseError{f, "bad LOC Longitude minutes", l}, ""
+	} else {
+		rr.Longitude += 1000 * 60 * uint32(i)
+	}
+	<-c // zBlank
+	l = <-c
+	if i, e := strconv.ParseFloat(l.token, 32); e != nil || l.err {
+		return nil, &ParseError{f, "bad LOC Longitude seconds", l}, ""
+	} else {
+		rr.Longitude += uint32(1000 * i)
+	}
+	<-c // zBlank
+	// Either number, 'E' or 'W'
+	l = <-c
+	if rr.Longitude, ok = locCheckEast(l.token, rr.Longitude); ok {
+		goto Altitude
+	}
+	// If still alive, flag an error
+	return nil, &ParseError{f, "bad LOC Longitude East/West", l}, ""
+
+Altitude:
+	<-c // zBlank
+	l = <-c
+	if l.length == 0 || l.err {
+		return nil, &ParseError{f, "bad LOC Altitude", l}, ""
+	}
+	if l.token[len(l.token)-1] == 'M' || l.token[len(l.token)-1] == 'm' {
+		l.token = l.token[0 : len(l.token)-1]
+	}
+	if i, e := strconv.ParseFloat(l.token, 32); e != nil {
+		return nil, &ParseError{f, "bad LOC Altitude", l}, ""
+	} else {
+		rr.Altitude = uint32(i*100.0 + 10000000.0 + 0.5)
+	}
+
+	// And now optionally the other values
+	l = <-c
+	count := 0
+	for l.value != zNewline && l.value != zEOF {
+		switch l.value {
+		case zString:
+			switch count {
+			case 0: // Size
+				e, m, ok := stringToCm(l.token)
+				if !ok {
+					return nil, &ParseError{f, "bad LOC Size", l}, ""
+				}
+				rr.Size = (e & 0x0f) | (m << 4 & 0xf0)
+			case 1: // HorizPre
+				e, m, ok := stringToCm(l.token)
+				if !ok {
+					return nil, &ParseError{f, "bad LOC HorizPre", l}, ""
+				}
+				rr.HorizPre = (e & 0x0f) | (m << 4 & 0xf0)
+			case 2: // VertPre
+				e, m, ok := stringToCm(l.token)
+				if !ok {
+					return nil, &ParseError{f, "bad LOC VertPre", l}, ""
+				}
+				rr.VertPre = (e & 0x0f) | (m << 4 & 0xf0)
+			}
+			count++
+		case zBlank:
+			// Ok
+		default:
+			return nil, &ParseError{f, "bad LOC Size, HorizPre or VertPre", l}, ""
+		}
+		l = <-c
+	}
+	return rr, nil, ""
+}
+
+func setHIP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(HIP)
+	rr.Hdr = h
+
+	// HitLength is not represented
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad HIP PublicKeyAlgorithm", l}, ""
+	}
+	rr.PublicKeyAlgorithm = uint8(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	if l.length == 0 || l.err {
+		return nil, &ParseError{f, "bad HIP Hit", l}, ""
+	}
+	rr.Hit = l.token // This can not contain spaces, see RFC 5205 Section 6.
+	rr.HitLength = uint8(len(rr.Hit)) / 2
+
+	<-c     // zBlank
+	l = <-c // zString
+	if l.length == 0 || l.err {
+		return nil, &ParseError{f, "bad HIP PublicKey", l}, ""
+	}
+	rr.PublicKey = l.token // This cannot contain spaces
+	rr.PublicKeyLength = uint16(base64.StdEncoding.DecodedLen(len(rr.PublicKey)))
+
+	// RendezvousServers (if any)
+	l = <-c
+	var xs []string
+	for l.value != zNewline && l.value != zEOF {
+		switch l.value {
+		case zString:
+			name, nameOk := toAbsoluteName(l.token, o)
+			if l.err || !nameOk {
+				return nil, &ParseError{f, "bad HIP RendezvousServers", l}, ""
+			}
+			xs = append(xs, name)
+		case zBlank:
+			// Ok
+		default:
+			return nil, &ParseError{f, "bad HIP RendezvousServers", l}, ""
+		}
+		l = <-c
+	}
+	rr.RendezvousServers = xs
+	return rr, nil, l.comment
+}
+
+func setCERT(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(CERT)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	if v, ok := StringToCertType[l.token]; ok {
+		rr.Type = v
+	} else if i, e := strconv.ParseUint(l.token, 10, 16); e != nil {
+		return nil, &ParseError{f, "bad CERT Type", l}, ""
+	} else {
+		rr.Type = uint16(i)
+	}
+	<-c     // zBlank
+	l = <-c // zString
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad CERT KeyTag", l}, ""
+	}
+	rr.KeyTag = uint16(i)
+	<-c     // zBlank
+	l = <-c // zString
+	if v, ok := StringToAlgorithm[l.token]; ok {
+		rr.Algorithm = v
+	} else if i, e := strconv.ParseUint(l.token, 10, 8); e != nil {
+		return nil, &ParseError{f, "bad CERT Algorithm", l}, ""
+	} else {
+		rr.Algorithm = uint8(i)
+	}
+	s, e1, c1 := endingToString(c, "bad CERT Certificate", f)
+	if e1 != nil {
+		return nil, e1, c1
+	}
+	rr.Certificate = s
+	return rr, nil, c1
+}
+
+func setOPENPGPKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(OPENPGPKEY)
+	rr.Hdr = h
+
+	s, e, c1 := endingToString(c, "bad OPENPGPKEY PublicKey", f)
+	if e != nil {
+		return nil, e, c1
+	}
+	rr.PublicKey = s
+	return rr, nil, c1
+}
+
+func setCSYNC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(CSYNC)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+	j, e := strconv.ParseUint(l.token, 10, 32)
+	if e != nil {
+		// Serial must be a number
+		return nil, &ParseError{f, "bad CSYNC serial", l}, ""
+	}
+	rr.Serial = uint32(j)
+
+	<-c // zBlank
+
+	l = <-c
+	j, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil {
+		// Serial must be a number
+		return nil, &ParseError{f, "bad CSYNC flags", l}, ""
+	}
+	rr.Flags = uint16(j)
+
+	rr.TypeBitMap = make([]uint16, 0)
+	var (
+		k  uint16
+		ok bool
+	)
+	l = <-c
+	for l.value != zNewline && l.value != zEOF {
+		switch l.value {
+		case zBlank:
+			// Ok
+		case zString:
+			if k, ok = StringToType[l.tokenUpper]; !ok {
+				if k, ok = typeToInt(l.tokenUpper); !ok {
+					return nil, &ParseError{f, "bad CSYNC TypeBitMap", l}, ""
+				}
+			}
+			rr.TypeBitMap = append(rr.TypeBitMap, k)
+		default:
+			return nil, &ParseError{f, "bad CSYNC TypeBitMap", l}, ""
+		}
+		l = <-c
+	}
+	return rr, nil, l.comment
+}
+
+func setSIG(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setRRSIG(h, c, o, f)
+	if r != nil {
+		return &SIG{*r.(*RRSIG)}, e, s
+	}
+	return nil, e, s
+}
+
+func setRRSIG(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(RRSIG)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	if t, ok := StringToType[l.tokenUpper]; !ok {
+		if strings.HasPrefix(l.tokenUpper, "TYPE") {
+			t, ok = typeToInt(l.tokenUpper)
+			if !ok {
+				return nil, &ParseError{f, "bad RRSIG Typecovered", l}, ""
+			}
+			rr.TypeCovered = t
+		} else {
+			return nil, &ParseError{f, "bad RRSIG Typecovered", l}, ""
+		}
+	} else {
+		rr.TypeCovered = t
+	}
+
+	<-c // zBlank
+	l = <-c
+	i, err := strconv.ParseUint(l.token, 10, 8)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad RRSIG Algorithm", l}, ""
+	}
+	rr.Algorithm = uint8(i)
+
+	<-c // zBlank
+	l = <-c
+	i, err = strconv.ParseUint(l.token, 10, 8)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad RRSIG Labels", l}, ""
+	}
+	rr.Labels = uint8(i)
+
+	<-c // zBlank
+	l = <-c
+	i, err = strconv.ParseUint(l.token, 10, 32)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad RRSIG OrigTtl", l}, ""
+	}
+	rr.OrigTtl = uint32(i)
+
+	<-c // zBlank
+	l = <-c
+	if i, err := StringToTime(l.token); err != nil {
+		// Try to see if all numeric and use it as epoch
+		if i, err := strconv.ParseInt(l.token, 10, 64); err == nil {
+			// TODO(miek): error out on > MAX_UINT32, same below
+			rr.Expiration = uint32(i)
+		} else {
+			return nil, &ParseError{f, "bad RRSIG Expiration", l}, ""
+		}
+	} else {
+		rr.Expiration = i
+	}
+
+	<-c // zBlank
+	l = <-c
+	if i, err := StringToTime(l.token); err != nil {
+		if i, err := strconv.ParseInt(l.token, 10, 64); err == nil {
+			rr.Inception = uint32(i)
+		} else {
+			return nil, &ParseError{f, "bad RRSIG Inception", l}, ""
+		}
+	} else {
+		rr.Inception = i
+	}
+
+	<-c // zBlank
+	l = <-c
+	i, err = strconv.ParseUint(l.token, 10, 16)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad RRSIG KeyTag", l}, ""
+	}
+	rr.KeyTag = uint16(i)
+
+	<-c // zBlank
+	l = <-c
+	rr.SignerName = l.token
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad RRSIG SignerName", l}, ""
+	}
+	rr.SignerName = name
+
+	s, e, c1 := endingToString(c, "bad RRSIG Signature", f)
+	if e != nil {
+		return nil, e, c1
+	}
+	rr.Signature = s
+
+	return rr, nil, c1
+}
+
+func setNSEC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NSEC)
+	rr.Hdr = h
+
+	l := <-c
+	rr.NextDomain = l.token
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad NSEC NextDomain", l}, ""
+	}
+	rr.NextDomain = name
+
+	rr.TypeBitMap = make([]uint16, 0)
+	var (
+		k  uint16
+		ok bool
+	)
+	l = <-c
+	for l.value != zNewline && l.value != zEOF {
+		switch l.value {
+		case zBlank:
+			// Ok
+		case zString:
+			if k, ok = StringToType[l.tokenUpper]; !ok {
+				if k, ok = typeToInt(l.tokenUpper); !ok {
+					return nil, &ParseError{f, "bad NSEC TypeBitMap", l}, ""
+				}
+			}
+			rr.TypeBitMap = append(rr.TypeBitMap, k)
+		default:
+			return nil, &ParseError{f, "bad NSEC TypeBitMap", l}, ""
+		}
+		l = <-c
+	}
+	return rr, nil, l.comment
+}
+
+func setNSEC3(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NSEC3)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NSEC3 Hash", l}, ""
+	}
+	rr.Hash = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NSEC3 Flags", l}, ""
+	}
+	rr.Flags = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NSEC3 Iterations", l}, ""
+	}
+	rr.Iterations = uint16(i)
+	<-c
+	l = <-c
+	if len(l.token) == 0 || l.err {
+		return nil, &ParseError{f, "bad NSEC3 Salt", l}, ""
+	}
+	rr.SaltLength = uint8(len(l.token)) / 2
+	rr.Salt = l.token
+
+	<-c
+	l = <-c
+	if len(l.token) == 0 || l.err {
+		return nil, &ParseError{f, "bad NSEC3 NextDomain", l}, ""
+	}
+	rr.HashLength = 20 // Fix for NSEC3 (sha1 160 bits)
+	rr.NextDomain = l.token
+
+	rr.TypeBitMap = make([]uint16, 0)
+	var (
+		k  uint16
+		ok bool
+	)
+	l = <-c
+	for l.value != zNewline && l.value != zEOF {
+		switch l.value {
+		case zBlank:
+			// Ok
+		case zString:
+			if k, ok = StringToType[l.tokenUpper]; !ok {
+				if k, ok = typeToInt(l.tokenUpper); !ok {
+					return nil, &ParseError{f, "bad NSEC3 TypeBitMap", l}, ""
+				}
+			}
+			rr.TypeBitMap = append(rr.TypeBitMap, k)
+		default:
+			return nil, &ParseError{f, "bad NSEC3 TypeBitMap", l}, ""
+		}
+		l = <-c
+	}
+	return rr, nil, l.comment
+}
+
+func setNSEC3PARAM(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NSEC3PARAM)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NSEC3PARAM Hash", l}, ""
+	}
+	rr.Hash = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NSEC3PARAM Flags", l}, ""
+	}
+	rr.Flags = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NSEC3PARAM Iterations", l}, ""
+	}
+	rr.Iterations = uint16(i)
+	<-c
+	l = <-c
+	rr.SaltLength = uint8(len(l.token))
+	rr.Salt = l.token
+	return rr, nil, ""
+}
+
+func setEUI48(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(EUI48)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	if l.length != 17 || l.err {
+		return nil, &ParseError{f, "bad EUI48 Address", l}, ""
+	}
+	addr := make([]byte, 12)
+	dash := 0
+	for i := 0; i < 10; i += 2 {
+		addr[i] = l.token[i+dash]
+		addr[i+1] = l.token[i+1+dash]
+		dash++
+		if l.token[i+1+dash] != '-' {
+			return nil, &ParseError{f, "bad EUI48 Address", l}, ""
+		}
+	}
+	addr[10] = l.token[15]
+	addr[11] = l.token[16]
+
+	i, e := strconv.ParseUint(string(addr), 16, 48)
+	if e != nil {
+		return nil, &ParseError{f, "bad EUI48 Address", l}, ""
+	}
+	rr.Address = i
+	return rr, nil, ""
+}
+
+func setEUI64(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(EUI64)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	if l.length != 23 || l.err {
+		return nil, &ParseError{f, "bad EUI64 Address", l}, ""
+	}
+	addr := make([]byte, 16)
+	dash := 0
+	for i := 0; i < 14; i += 2 {
+		addr[i] = l.token[i+dash]
+		addr[i+1] = l.token[i+1+dash]
+		dash++
+		if l.token[i+1+dash] != '-' {
+			return nil, &ParseError{f, "bad EUI64 Address", l}, ""
+		}
+	}
+	addr[14] = l.token[21]
+	addr[15] = l.token[22]
+
+	i, e := strconv.ParseUint(string(addr), 16, 64)
+	if e != nil {
+		return nil, &ParseError{f, "bad EUI68 Address", l}, ""
+	}
+	rr.Address = uint64(i)
+	return rr, nil, ""
+}
+
+func setSSHFP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(SSHFP)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SSHFP Algorithm", l}, ""
+	}
+	rr.Algorithm = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SSHFP Type", l}, ""
+	}
+	rr.Type = uint8(i)
+	<-c // zBlank
+	s, e1, c1 := endingToString(c, "bad SSHFP Fingerprint", f)
+	if e1 != nil {
+		return nil, e1, c1
+	}
+	rr.FingerPrint = s
+	return rr, nil, ""
+}
+
+func setDNSKEYs(h RR_Header, c chan lex, o, f, typ string) (RR, *ParseError, string) {
+	rr := new(DNSKEY)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad " + typ + " Flags", l}, ""
+	}
+	rr.Flags = uint16(i)
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad " + typ + " Protocol", l}, ""
+	}
+	rr.Protocol = uint8(i)
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad " + typ + " Algorithm", l}, ""
+	}
+	rr.Algorithm = uint8(i)
+	s, e1, c1 := endingToString(c, "bad "+typ+" PublicKey", f)
+	if e1 != nil {
+		return nil, e1, c1
+	}
+	rr.PublicKey = s
+	return rr, nil, c1
+}
+
+func setKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setDNSKEYs(h, c, o, f, "KEY")
+	if r != nil {
+		return &KEY{*r.(*DNSKEY)}, e, s
+	}
+	return nil, e, s
+}
+
+func setDNSKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setDNSKEYs(h, c, o, f, "DNSKEY")
+	return r, e, s
+}
+
+func setCDNSKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setDNSKEYs(h, c, o, f, "CDNSKEY")
+	if r != nil {
+		return &CDNSKEY{*r.(*DNSKEY)}, e, s
+	}
+	return nil, e, s
+}
+
+func setRKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(RKEY)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad RKEY Flags", l}, ""
+	}
+	rr.Flags = uint16(i)
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad RKEY Protocol", l}, ""
+	}
+	rr.Protocol = uint8(i)
+	<-c     // zBlank
+	l = <-c // zString
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad RKEY Algorithm", l}, ""
+	}
+	rr.Algorithm = uint8(i)
+	s, e1, c1 := endingToString(c, "bad RKEY PublicKey", f)
+	if e1 != nil {
+		return nil, e1, c1
+	}
+	rr.PublicKey = s
+	return rr, nil, c1
+}
+
+func setEID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(EID)
+	rr.Hdr = h
+	s, e, c1 := endingToString(c, "bad EID Endpoint", f)
+	if e != nil {
+		return nil, e, c1
+	}
+	rr.Endpoint = s
+	return rr, nil, c1
+}
+
+func setNIMLOC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NIMLOC)
+	rr.Hdr = h
+	s, e, c1 := endingToString(c, "bad NIMLOC Locator", f)
+	if e != nil {
+		return nil, e, c1
+	}
+	rr.Locator = s
+	return rr, nil, c1
+}
+
+func setGPOS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(GPOS)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	_, e := strconv.ParseFloat(l.token, 64)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad GPOS Longitude", l}, ""
+	}
+	rr.Longitude = l.token
+	<-c // zBlank
+	l = <-c
+	_, e = strconv.ParseFloat(l.token, 64)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad GPOS Latitude", l}, ""
+	}
+	rr.Latitude = l.token
+	<-c // zBlank
+	l = <-c
+	_, e = strconv.ParseFloat(l.token, 64)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad GPOS Altitude", l}, ""
+	}
+	rr.Altitude = l.token
+	return rr, nil, ""
+}
+
+func setDSs(h RR_Header, c chan lex, o, f, typ string) (RR, *ParseError, string) {
+	rr := new(DS)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad " + typ + " KeyTag", l}, ""
+	}
+	rr.KeyTag = uint16(i)
+	<-c // zBlank
+	l = <-c
+	if i, e = strconv.ParseUint(l.token, 10, 8); e != nil {
+		i, ok := StringToAlgorithm[l.tokenUpper]
+		if !ok || l.err {
+			return nil, &ParseError{f, "bad " + typ + " Algorithm", l}, ""
+		}
+		rr.Algorithm = i
+	} else {
+		rr.Algorithm = uint8(i)
+	}
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad " + typ + " DigestType", l}, ""
+	}
+	rr.DigestType = uint8(i)
+	s, e1, c1 := endingToString(c, "bad "+typ+" Digest", f)
+	if e1 != nil {
+		return nil, e1, c1
+	}
+	rr.Digest = s
+	return rr, nil, c1
+}
+
+func setDS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setDSs(h, c, o, f, "DS")
+	return r, e, s
+}
+
+func setDLV(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setDSs(h, c, o, f, "DLV")
+	if r != nil {
+		return &DLV{*r.(*DS)}, e, s
+	}
+	return nil, e, s
+}
+
+func setCDS(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	r, e, s := setDSs(h, c, o, f, "CDS")
+	if r != nil {
+		return &CDS{*r.(*DS)}, e, s
+	}
+	return nil, e, s
+}
+
+func setTA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(TA)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad TA KeyTag", l}, ""
+	}
+	rr.KeyTag = uint16(i)
+	<-c // zBlank
+	l = <-c
+	if i, e := strconv.ParseUint(l.token, 10, 8); e != nil {
+		i, ok := StringToAlgorithm[l.tokenUpper]
+		if !ok || l.err {
+			return nil, &ParseError{f, "bad TA Algorithm", l}, ""
+		}
+		rr.Algorithm = i
+	} else {
+		rr.Algorithm = uint8(i)
+	}
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad TA DigestType", l}, ""
+	}
+	rr.DigestType = uint8(i)
+	s, e, c1 := endingToString(c, "bad TA Digest", f)
+	if e != nil {
+		return nil, e.(*ParseError), c1
+	}
+	rr.Digest = s
+	return rr, nil, c1
+}
+
+func setTLSA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(TLSA)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad TLSA Usage", l}, ""
+	}
+	rr.Usage = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad TLSA Selector", l}, ""
+	}
+	rr.Selector = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad TLSA MatchingType", l}, ""
+	}
+	rr.MatchingType = uint8(i)
+	// So this needs be e2 (i.e. different than e), because...??t
+	s, e2, c1 := endingToString(c, "bad TLSA Certificate", f)
+	if e2 != nil {
+		return nil, e2, c1
+	}
+	rr.Certificate = s
+	return rr, nil, c1
+}
+
+func setSMIMEA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(SMIMEA)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SMIMEA Usage", l}, ""
+	}
+	rr.Usage = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SMIMEA Selector", l}, ""
+	}
+	rr.Selector = uint8(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 8)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad SMIMEA MatchingType", l}, ""
+	}
+	rr.MatchingType = uint8(i)
+	// So this needs be e2 (i.e. different than e), because...??t
+	s, e2, c1 := endingToString(c, "bad SMIMEA Certificate", f)
+	if e2 != nil {
+		return nil, e2, c1
+	}
+	rr.Certificate = s
+	return rr, nil, c1
+}
+
+func setRFC3597(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(RFC3597)
+	rr.Hdr = h
+
+	l := <-c
+	if l.token != "\\#" {
+		return nil, &ParseError{f, "bad RFC3597 Rdata", l}, ""
+	}
+
+	<-c // zBlank
+	l = <-c
+	rdlength, e := strconv.Atoi(l.token)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad RFC3597 Rdata ", l}, ""
+	}
+
+	s, e1, c1 := endingToString(c, "bad RFC3597 Rdata", f)
+	if e1 != nil {
+		return nil, e1, c1
+	}
+	if rdlength*2 != len(s) {
+		return nil, &ParseError{f, "bad RFC3597 Rdata", l}, ""
+	}
+	rr.Rdata = s
+	return rr, nil, c1
+}
+
+func setSPF(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(SPF)
+	rr.Hdr = h
+
+	s, e, c1 := endingToTxtSlice(c, "bad SPF Txt", f)
+	if e != nil {
+		return nil, e, ""
+	}
+	rr.Txt = s
+	return rr, nil, c1
+}
+
+func setAVC(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(AVC)
+	rr.Hdr = h
+
+	s, e, c1 := endingToTxtSlice(c, "bad AVC Txt", f)
+	if e != nil {
+		return nil, e, ""
+	}
+	rr.Txt = s
+	return rr, nil, c1
+}
+
+func setTXT(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(TXT)
+	rr.Hdr = h
+
+	// no zBlank reading here, because all this rdata is TXT
+	s, e, c1 := endingToTxtSlice(c, "bad TXT Txt", f)
+	if e != nil {
+		return nil, e, ""
+	}
+	rr.Txt = s
+	return rr, nil, c1
+}
+
+// identical to setTXT
+func setNINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NINFO)
+	rr.Hdr = h
+
+	s, e, c1 := endingToTxtSlice(c, "bad NINFO ZSData", f)
+	if e != nil {
+		return nil, e, ""
+	}
+	rr.ZSData = s
+	return rr, nil, c1
+}
+
+func setURI(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(URI)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad URI Priority", l}, ""
+	}
+	rr.Priority = uint16(i)
+	<-c // zBlank
+	l = <-c
+	i, e = strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad URI Weight", l}, ""
+	}
+	rr.Weight = uint16(i)
+
+	<-c // zBlank
+	s, err, c1 := endingToTxtSlice(c, "bad URI Target", f)
+	if err != nil {
+		return nil, err, ""
+	}
+	if len(s) != 1 {
+		return nil, &ParseError{f, "bad URI Target", l}, ""
+	}
+	rr.Target = s[0]
+	return rr, nil, c1
+}
+
+func setDHCID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	// awesome record to parse!
+	rr := new(DHCID)
+	rr.Hdr = h
+
+	s, e, c1 := endingToString(c, "bad DHCID Digest", f)
+	if e != nil {
+		return nil, e, c1
+	}
+	rr.Digest = s
+	return rr, nil, c1
+}
+
+func setNID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(NID)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad NID Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+	<-c     // zBlank
+	l = <-c // zString
+	u, err := stringToNodeID(l)
+	if err != nil || l.err {
+		return nil, err, ""
+	}
+	rr.NodeID = u
+	return rr, nil, ""
+}
+
+func setL32(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(L32)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad L32 Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Locator32 = net.ParseIP(l.token)
+	if rr.Locator32 == nil || l.err {
+		return nil, &ParseError{f, "bad L32 Locator", l}, ""
+	}
+	return rr, nil, ""
+}
+
+func setLP(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(LP)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad LP Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Fqdn = l.token
+	name, nameOk := toAbsoluteName(l.token, o)
+	if l.err || !nameOk {
+		return nil, &ParseError{f, "bad LP Fqdn", l}, ""
+	}
+	rr.Fqdn = name
+
+	return rr, nil, ""
+}
+
+func setL64(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(L64)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad L64 Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+	<-c     // zBlank
+	l = <-c // zString
+	u, err := stringToNodeID(l)
+	if err != nil || l.err {
+		return nil, err, ""
+	}
+	rr.Locator64 = u
+	return rr, nil, ""
+}
+
+func setUID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(UID)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 32)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad UID Uid", l}, ""
+	}
+	rr.Uid = uint32(i)
+	return rr, nil, ""
+}
+
+func setGID(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(GID)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 32)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad GID Gid", l}, ""
+	}
+	rr.Gid = uint32(i)
+	return rr, nil, ""
+}
+
+func setUINFO(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(UINFO)
+	rr.Hdr = h
+
+	s, e, c1 := endingToTxtSlice(c, "bad UINFO Uinfo", f)
+	if e != nil {
+		return nil, e, c1
+	}
+	if ln := len(s); ln == 0 {
+		return rr, nil, c1
+	}
+	rr.Uinfo = s[0] // silently discard anything after the first character-string
+	return rr, nil, c1
+}
+
+func setPX(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(PX)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, ""
+	}
+
+	i, e := strconv.ParseUint(l.token, 10, 16)
+	if e != nil || l.err {
+		return nil, &ParseError{f, "bad PX Preference", l}, ""
+	}
+	rr.Preference = uint16(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Map822 = l.token
+	map822, map822Ok := toAbsoluteName(l.token, o)
+	if l.err || !map822Ok {
+		return nil, &ParseError{f, "bad PX Map822", l}, ""
+	}
+	rr.Map822 = map822
+
+	<-c     // zBlank
+	l = <-c // zString
+	rr.Mapx400 = l.token
+	mapx400, mapx400Ok := toAbsoluteName(l.token, o)
+	if l.err || !mapx400Ok {
+		return nil, &ParseError{f, "bad PX Mapx400", l}, ""
+	}
+	rr.Mapx400 = mapx400
+
+	return rr, nil, ""
+}
+
+func setCAA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(CAA)
+	rr.Hdr = h
+
+	l := <-c
+	if l.length == 0 { // dynamic update rr.
+		return rr, nil, l.comment
+	}
+
+	i, err := strconv.ParseUint(l.token, 10, 8)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad CAA Flag", l}, ""
+	}
+	rr.Flag = uint8(i)
+
+	<-c     // zBlank
+	l = <-c // zString
+	if l.value != zString {
+		return nil, &ParseError{f, "bad CAA Tag", l}, ""
+	}
+	rr.Tag = l.token
+
+	<-c // zBlank
+	s, e, c1 := endingToTxtSlice(c, "bad CAA Value", f)
+	if e != nil {
+		return nil, e, ""
+	}
+	if len(s) != 1 {
+		return nil, &ParseError{f, "bad CAA Value", l}, ""
+	}
+	rr.Value = s[0]
+	return rr, nil, c1
+}
+
+func setTKEY(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
+	rr := new(TKEY)
+	rr.Hdr = h
+
+	l := <-c
+
+	// Algorithm
+	if l.value != zString {
+		return nil, &ParseError{f, "bad TKEY algorithm", l}, ""
+	}
+	rr.Algorithm = l.token
+	<-c // zBlank
+
+	// Get the key length and key values
+	l = <-c
+	i, err := strconv.ParseUint(l.token, 10, 8)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad TKEY key length", l}, ""
+	}
+	rr.KeySize = uint16(i)
+	<-c // zBlank
+	l = <-c
+	if l.value != zString {
+		return nil, &ParseError{f, "bad TKEY key", l}, ""
+	}
+	rr.Key = l.token
+	<-c // zBlank
+
+	// Get the otherdata length and string data
+	l = <-c
+	i, err = strconv.ParseUint(l.token, 10, 8)
+	if err != nil || l.err {
+		return nil, &ParseError{f, "bad TKEY otherdata length", l}, ""
+	}
+	rr.OtherLen = uint16(i)
+	<-c // zBlank
+	l = <-c
+	if l.value != zString {
+		return nil, &ParseError{f, "bad TKEY otherday", l}, ""
+	}
+	rr.OtherData = l.token
+
+	return rr, nil, ""
+}
+
+var typeToparserFunc = map[uint16]parserFunc{
+	TypeAAAA:       {setAAAA, false},
+	TypeAFSDB:      {setAFSDB, false},
+	TypeA:          {setA, false},
+	TypeCAA:        {setCAA, true},
+	TypeCDS:        {setCDS, true},
+	TypeCDNSKEY:    {setCDNSKEY, true},
+	TypeCERT:       {setCERT, true},
+	TypeCNAME:      {setCNAME, false},
+	TypeCSYNC:      {setCSYNC, true},
+	TypeDHCID:      {setDHCID, true},
+	TypeDLV:        {setDLV, true},
+	TypeDNAME:      {setDNAME, false},
+	TypeKEY:        {setKEY, true},
+	TypeDNSKEY:     {setDNSKEY, true},
+	TypeDS:         {setDS, true},
+	TypeEID:        {setEID, true},
+	TypeEUI48:      {setEUI48, false},
+	TypeEUI64:      {setEUI64, false},
+	TypeGID:        {setGID, false},
+	TypeGPOS:       {setGPOS, false},
+	TypeHINFO:      {setHINFO, true},
+	TypeHIP:        {setHIP, true},
+	TypeKX:         {setKX, false},
+	TypeL32:        {setL32, false},
+	TypeL64:        {setL64, false},
+	TypeLOC:        {setLOC, true},
+	TypeLP:         {setLP, false},
+	TypeMB:         {setMB, false},
+	TypeMD:         {setMD, false},
+	TypeMF:         {setMF, false},
+	TypeMG:         {setMG, false},
+	TypeMINFO:      {setMINFO, false},
+	TypeMR:         {setMR, false},
+	TypeMX:         {setMX, false},
+	TypeNAPTR:      {setNAPTR, false},
+	TypeNID:        {setNID, false},
+	TypeNIMLOC:     {setNIMLOC, true},
+	TypeNINFO:      {setNINFO, true},
+	TypeNSAPPTR:    {setNSAPPTR, false},
+	TypeNSEC3PARAM: {setNSEC3PARAM, false},
+	TypeNSEC3:      {setNSEC3, true},
+	TypeNSEC:       {setNSEC, true},
+	TypeNS:         {setNS, false},
+	TypeOPENPGPKEY: {setOPENPGPKEY, true},
+	TypePTR:        {setPTR, false},
+	TypePX:         {setPX, false},
+	TypeSIG:        {setSIG, true},
+	TypeRKEY:       {setRKEY, true},
+	TypeRP:         {setRP, false},
+	TypeRRSIG:      {setRRSIG, true},
+	TypeRT:         {setRT, false},
+	TypeSMIMEA:     {setSMIMEA, true},
+	TypeSOA:        {setSOA, false},
+	TypeSPF:        {setSPF, true},
+	TypeAVC:        {setAVC, true},
+	TypeSRV:        {setSRV, false},
+	TypeSSHFP:      {setSSHFP, true},
+	TypeTALINK:     {setTALINK, false},
+	TypeTA:         {setTA, true},
+	TypeTLSA:       {setTLSA, true},
+	TypeTXT:        {setTXT, true},
+	TypeUID:        {setUID, false},
+	TypeUINFO:      {setUINFO, true},
+	TypeURI:        {setURI, true},
+	TypeX25:        {setX25, false},
+	TypeTKEY:       {setTKEY, true},
+}
diff --git a/vendor/github.com/miekg/dns/scanner.go b/vendor/github.com/miekg/dns/scanner.go
new file mode 100644
index 0000000..424e5af
--- /dev/null
+++ b/vendor/github.com/miekg/dns/scanner.go
@@ -0,0 +1,56 @@
+package dns
+
+// Implement a simple scanner, return a byte stream from an io reader.
+
+import (
+	"bufio"
+	"context"
+	"io"
+	"text/scanner"
+)
+
+type scan struct {
+	src      *bufio.Reader
+	position scanner.Position
+	eof      bool // Have we just seen a eof
+	ctx      context.Context
+}
+
+func scanInit(r io.Reader) (*scan, context.CancelFunc) {
+	s := new(scan)
+	s.src = bufio.NewReader(r)
+	s.position.Line = 1
+
+	ctx, cancel := context.WithCancel(context.Background())
+	s.ctx = ctx
+
+	return s, cancel
+}
+
+// tokenText returns the next byte from the input
+func (s *scan) tokenText() (byte, error) {
+	c, err := s.src.ReadByte()
+	if err != nil {
+		return c, err
+	}
+	select {
+	case <-s.ctx.Done():
+		return c, context.Canceled
+	default:
+		break
+	}
+
+	// delay the newline handling until the next token is delivered,
+	// fixes off-by-one errors when reporting a parse error.
+	if s.eof == true {
+		s.position.Line++
+		s.position.Column = 0
+		s.eof = false
+	}
+	if c == '\n' {
+		s.eof = true
+		return c, nil
+	}
+	s.position.Column++
+	return c, nil
+}
diff --git a/vendor/github.com/miekg/dns/server.go b/vendor/github.com/miekg/dns/server.go
new file mode 100644
index 0000000..685753f
--- /dev/null
+++ b/vendor/github.com/miekg/dns/server.go
@@ -0,0 +1,719 @@
+// DNS server implementation.
+
+package dns
+
+import (
+	"bytes"
+	"crypto/tls"
+	"encoding/binary"
+	"io"
+	"net"
+	"sync"
+	"time"
+)
+
+// Maximum number of TCP queries before we close the socket.
+const maxTCPQueries = 128
+
+// Handler is implemented by any value that implements ServeDNS.
+type Handler interface {
+	ServeDNS(w ResponseWriter, r *Msg)
+}
+
+// A ResponseWriter interface is used by an DNS handler to
+// construct an DNS response.
+type ResponseWriter interface {
+	// LocalAddr returns the net.Addr of the server
+	LocalAddr() net.Addr
+	// RemoteAddr returns the net.Addr of the client that sent the current request.
+	RemoteAddr() net.Addr
+	// WriteMsg writes a reply back to the client.
+	WriteMsg(*Msg) error
+	// Write writes a raw buffer back to the client.
+	Write([]byte) (int, error)
+	// Close closes the connection.
+	Close() error
+	// TsigStatus returns the status of the Tsig.
+	TsigStatus() error
+	// TsigTimersOnly sets the tsig timers only boolean.
+	TsigTimersOnly(bool)
+	// Hijack lets the caller take over the connection.
+	// After a call to Hijack(), the DNS package will not do anything with the connection.
+	Hijack()
+}
+
+type response struct {
+	hijacked       bool // connection has been hijacked by handler
+	tsigStatus     error
+	tsigTimersOnly bool
+	tsigRequestMAC string
+	tsigSecret     map[string]string // the tsig secrets
+	udp            *net.UDPConn      // i/o connection if UDP was used
+	tcp            net.Conn          // i/o connection if TCP was used
+	udpSession     *SessionUDP       // oob data to get egress interface right
+	remoteAddr     net.Addr          // address of the client
+	writer         Writer            // writer to output the raw DNS bits
+}
+
+// ServeMux is an DNS request multiplexer. It matches the
+// zone name of each incoming request against a list of
+// registered patterns add calls the handler for the pattern
+// that most closely matches the zone name. ServeMux is DNSSEC aware, meaning
+// that queries for the DS record are redirected to the parent zone (if that
+// is also registered), otherwise the child gets the query.
+// ServeMux is also safe for concurrent access from multiple goroutines.
+type ServeMux struct {
+	z map[string]Handler
+	m *sync.RWMutex
+}
+
+// NewServeMux allocates and returns a new ServeMux.
+func NewServeMux() *ServeMux { return &ServeMux{z: make(map[string]Handler), m: new(sync.RWMutex)} }
+
+// DefaultServeMux is the default ServeMux used by Serve.
+var DefaultServeMux = NewServeMux()
+
+// The HandlerFunc type is an adapter to allow the use of
+// ordinary functions as DNS handlers.  If f is a function
+// with the appropriate signature, HandlerFunc(f) is a
+// Handler object that calls f.
+type HandlerFunc func(ResponseWriter, *Msg)
+
+// ServeDNS calls f(w, r).
+func (f HandlerFunc) ServeDNS(w ResponseWriter, r *Msg) {
+	f(w, r)
+}
+
+// HandleFailed returns a HandlerFunc that returns SERVFAIL for every request it gets.
+func HandleFailed(w ResponseWriter, r *Msg) {
+	m := new(Msg)
+	m.SetRcode(r, RcodeServerFailure)
+	// does not matter if this write fails
+	w.WriteMsg(m)
+}
+
+func failedHandler() Handler { return HandlerFunc(HandleFailed) }
+
+// ListenAndServe Starts a server on address and network specified Invoke handler
+// for incoming queries.
+func ListenAndServe(addr string, network string, handler Handler) error {
+	server := &Server{Addr: addr, Net: network, Handler: handler}
+	return server.ListenAndServe()
+}
+
+// ListenAndServeTLS acts like http.ListenAndServeTLS, more information in
+// http://golang.org/pkg/net/http/#ListenAndServeTLS
+func ListenAndServeTLS(addr, certFile, keyFile string, handler Handler) error {
+	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
+	if err != nil {
+		return err
+	}
+
+	config := tls.Config{
+		Certificates: []tls.Certificate{cert},
+	}
+
+	server := &Server{
+		Addr:      addr,
+		Net:       "tcp-tls",
+		TLSConfig: &config,
+		Handler:   handler,
+	}
+
+	return server.ListenAndServe()
+}
+
+// ActivateAndServe activates a server with a listener from systemd,
+// l and p should not both be non-nil.
+// If both l and p are not nil only p will be used.
+// Invoke handler for incoming queries.
+func ActivateAndServe(l net.Listener, p net.PacketConn, handler Handler) error {
+	server := &Server{Listener: l, PacketConn: p, Handler: handler}
+	return server.ActivateAndServe()
+}
+
+func (mux *ServeMux) match(q string, t uint16) Handler {
+	mux.m.RLock()
+	defer mux.m.RUnlock()
+	var handler Handler
+	b := make([]byte, len(q)) // worst case, one label of length q
+	off := 0
+	end := false
+	for {
+		l := len(q[off:])
+		for i := 0; i < l; i++ {
+			b[i] = q[off+i]
+			if b[i] >= 'A' && b[i] <= 'Z' {
+				b[i] |= ('a' - 'A')
+			}
+		}
+		if h, ok := mux.z[string(b[:l])]; ok { // causes garbage, might want to change the map key
+			if t != TypeDS {
+				return h
+			}
+			// Continue for DS to see if we have a parent too, if so delegeate to the parent
+			handler = h
+		}
+		off, end = NextLabel(q, off)
+		if end {
+			break
+		}
+	}
+	// Wildcard match, if we have found nothing try the root zone as a last resort.
+	if h, ok := mux.z["."]; ok {
+		return h
+	}
+	return handler
+}
+
+// Handle adds a handler to the ServeMux for pattern.
+func (mux *ServeMux) Handle(pattern string, handler Handler) {
+	if pattern == "" {
+		panic("dns: invalid pattern " + pattern)
+	}
+	mux.m.Lock()
+	mux.z[Fqdn(pattern)] = handler
+	mux.m.Unlock()
+}
+
+// HandleFunc adds a handler function to the ServeMux for pattern.
+func (mux *ServeMux) HandleFunc(pattern string, handler func(ResponseWriter, *Msg)) {
+	mux.Handle(pattern, HandlerFunc(handler))
+}
+
+// HandleRemove deregistrars the handler specific for pattern from the ServeMux.
+func (mux *ServeMux) HandleRemove(pattern string) {
+	if pattern == "" {
+		panic("dns: invalid pattern " + pattern)
+	}
+	mux.m.Lock()
+	delete(mux.z, Fqdn(pattern))
+	mux.m.Unlock()
+}
+
+// ServeDNS dispatches the request to the handler whose
+// pattern most closely matches the request message. If DefaultServeMux
+// is used the correct thing for DS queries is done: a possible parent
+// is sought.
+// If no handler is found a standard SERVFAIL message is returned
+// If the request message does not have exactly one question in the
+// question section a SERVFAIL is returned, unlesss Unsafe is true.
+func (mux *ServeMux) ServeDNS(w ResponseWriter, request *Msg) {
+	var h Handler
+	if len(request.Question) < 1 { // allow more than one question
+		h = failedHandler()
+	} else {
+		if h = mux.match(request.Question[0].Name, request.Question[0].Qtype); h == nil {
+			h = failedHandler()
+		}
+	}
+	h.ServeDNS(w, request)
+}
+
+// Handle registers the handler with the given pattern
+// in the DefaultServeMux. The documentation for
+// ServeMux explains how patterns are matched.
+func Handle(pattern string, handler Handler) { DefaultServeMux.Handle(pattern, handler) }
+
+// HandleRemove deregisters the handle with the given pattern
+// in the DefaultServeMux.
+func HandleRemove(pattern string) { DefaultServeMux.HandleRemove(pattern) }
+
+// HandleFunc registers the handler function with the given pattern
+// in the DefaultServeMux.
+func HandleFunc(pattern string, handler func(ResponseWriter, *Msg)) {
+	DefaultServeMux.HandleFunc(pattern, handler)
+}
+
+// Writer writes raw DNS messages; each call to Write should send an entire message.
+type Writer interface {
+	io.Writer
+}
+
+// Reader reads raw DNS messages; each call to ReadTCP or ReadUDP should return an entire message.
+type Reader interface {
+	// ReadTCP reads a raw message from a TCP connection. Implementations may alter
+	// connection properties, for example the read-deadline.
+	ReadTCP(conn net.Conn, timeout time.Duration) ([]byte, error)
+	// ReadUDP reads a raw message from a UDP connection. Implementations may alter
+	// connection properties, for example the read-deadline.
+	ReadUDP(conn *net.UDPConn, timeout time.Duration) ([]byte, *SessionUDP, error)
+}
+
+// defaultReader is an adapter for the Server struct that implements the Reader interface
+// using the readTCP and readUDP func of the embedded Server.
+type defaultReader struct {
+	*Server
+}
+
+func (dr *defaultReader) ReadTCP(conn net.Conn, timeout time.Duration) ([]byte, error) {
+	return dr.readTCP(conn, timeout)
+}
+
+func (dr *defaultReader) ReadUDP(conn *net.UDPConn, timeout time.Duration) ([]byte, *SessionUDP, error) {
+	return dr.readUDP(conn, timeout)
+}
+
+// DecorateReader is a decorator hook for extending or supplanting the functionality of a Reader.
+// Implementations should never return a nil Reader.
+type DecorateReader func(Reader) Reader
+
+// DecorateWriter is a decorator hook for extending or supplanting the functionality of a Writer.
+// Implementations should never return a nil Writer.
+type DecorateWriter func(Writer) Writer
+
+// A Server defines parameters for running an DNS server.
+type Server struct {
+	// Address to listen on, ":dns" if empty.
+	Addr string
+	// if "tcp" or "tcp-tls" (DNS over TLS) it will invoke a TCP listener, otherwise an UDP one
+	Net string
+	// TCP Listener to use, this is to aid in systemd's socket activation.
+	Listener net.Listener
+	// TLS connection configuration
+	TLSConfig *tls.Config
+	// UDP "Listener" to use, this is to aid in systemd's socket activation.
+	PacketConn net.PacketConn
+	// Handler to invoke, dns.DefaultServeMux if nil.
+	Handler Handler
+	// Default buffer size to use to read incoming UDP messages. If not set
+	// it defaults to MinMsgSize (512 B).
+	UDPSize int
+	// The net.Conn.SetReadTimeout value for new connections, defaults to 2 * time.Second.
+	ReadTimeout time.Duration
+	// The net.Conn.SetWriteTimeout value for new connections, defaults to 2 * time.Second.
+	WriteTimeout time.Duration
+	// TCP idle timeout for multiple queries, if nil, defaults to 8 * time.Second (RFC 5966).
+	IdleTimeout func() time.Duration
+	// Secret(s) for Tsig map[<zonename>]<base64 secret>. The zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2).
+	TsigSecret map[string]string
+	// Unsafe instructs the server to disregard any sanity checks and directly hand the message to
+	// the handler. It will specifically not check if the query has the QR bit not set.
+	Unsafe bool
+	// If NotifyStartedFunc is set it is called once the server has started listening.
+	NotifyStartedFunc func()
+	// DecorateReader is optional, allows customization of the process that reads raw DNS messages.
+	DecorateReader DecorateReader
+	// DecorateWriter is optional, allows customization of the process that writes raw DNS messages.
+	DecorateWriter DecorateWriter
+
+	// Shutdown handling
+	lock    sync.RWMutex
+	started bool
+}
+
+// ListenAndServe starts a nameserver on the configured address in *Server.
+func (srv *Server) ListenAndServe() error {
+	srv.lock.Lock()
+	defer srv.lock.Unlock()
+	if srv.started {
+		return &Error{err: "server already started"}
+	}
+	addr := srv.Addr
+	if addr == "" {
+		addr = ":domain"
+	}
+	if srv.UDPSize == 0 {
+		srv.UDPSize = MinMsgSize
+	}
+	switch srv.Net {
+	case "tcp", "tcp4", "tcp6":
+		a, err := net.ResolveTCPAddr(srv.Net, addr)
+		if err != nil {
+			return err
+		}
+		l, err := net.ListenTCP(srv.Net, a)
+		if err != nil {
+			return err
+		}
+		srv.Listener = l
+		srv.started = true
+		srv.lock.Unlock()
+		err = srv.serveTCP(l)
+		srv.lock.Lock() // to satisfy the defer at the top
+		return err
+	case "tcp-tls", "tcp4-tls", "tcp6-tls":
+		network := "tcp"
+		if srv.Net == "tcp4-tls" {
+			network = "tcp4"
+		} else if srv.Net == "tcp6-tls" {
+			network = "tcp6"
+		}
+
+		l, err := tls.Listen(network, addr, srv.TLSConfig)
+		if err != nil {
+			return err
+		}
+		srv.Listener = l
+		srv.started = true
+		srv.lock.Unlock()
+		err = srv.serveTCP(l)
+		srv.lock.Lock() // to satisfy the defer at the top
+		return err
+	case "udp", "udp4", "udp6":
+		a, err := net.ResolveUDPAddr(srv.Net, addr)
+		if err != nil {
+			return err
+		}
+		l, err := net.ListenUDP(srv.Net, a)
+		if err != nil {
+			return err
+		}
+		if e := setUDPSocketOptions(l); e != nil {
+			return e
+		}
+		srv.PacketConn = l
+		srv.started = true
+		srv.lock.Unlock()
+		err = srv.serveUDP(l)
+		srv.lock.Lock() // to satisfy the defer at the top
+		return err
+	}
+	return &Error{err: "bad network"}
+}
+
+// ActivateAndServe starts a nameserver with the PacketConn or Listener
+// configured in *Server. Its main use is to start a server from systemd.
+func (srv *Server) ActivateAndServe() error {
+	srv.lock.Lock()
+	defer srv.lock.Unlock()
+	if srv.started {
+		return &Error{err: "server already started"}
+	}
+	pConn := srv.PacketConn
+	l := srv.Listener
+	if pConn != nil {
+		if srv.UDPSize == 0 {
+			srv.UDPSize = MinMsgSize
+		}
+		// Check PacketConn interface's type is valid and value
+		// is not nil
+		if t, ok := pConn.(*net.UDPConn); ok && t != nil {
+			if e := setUDPSocketOptions(t); e != nil {
+				return e
+			}
+			srv.started = true
+			srv.lock.Unlock()
+			e := srv.serveUDP(t)
+			srv.lock.Lock() // to satisfy the defer at the top
+			return e
+		}
+	}
+	if l != nil {
+		srv.started = true
+		srv.lock.Unlock()
+		e := srv.serveTCP(l)
+		srv.lock.Lock() // to satisfy the defer at the top
+		return e
+	}
+	return &Error{err: "bad listeners"}
+}
+
+// Shutdown shuts down a server. After a call to Shutdown, ListenAndServe and
+// ActivateAndServe will return.
+func (srv *Server) Shutdown() error {
+	srv.lock.Lock()
+	if !srv.started {
+		srv.lock.Unlock()
+		return &Error{err: "server not started"}
+	}
+	srv.started = false
+	srv.lock.Unlock()
+
+	if srv.PacketConn != nil {
+		srv.PacketConn.Close()
+	}
+	if srv.Listener != nil {
+		srv.Listener.Close()
+	}
+	return nil
+}
+
+// getReadTimeout is a helper func to use system timeout if server did not intend to change it.
+func (srv *Server) getReadTimeout() time.Duration {
+	rtimeout := dnsTimeout
+	if srv.ReadTimeout != 0 {
+		rtimeout = srv.ReadTimeout
+	}
+	return rtimeout
+}
+
+// serveTCP starts a TCP listener for the server.
+// Each request is handled in a separate goroutine.
+func (srv *Server) serveTCP(l net.Listener) error {
+	defer l.Close()
+
+	if srv.NotifyStartedFunc != nil {
+		srv.NotifyStartedFunc()
+	}
+
+	reader := Reader(&defaultReader{srv})
+	if srv.DecorateReader != nil {
+		reader = srv.DecorateReader(reader)
+	}
+
+	handler := srv.Handler
+	if handler == nil {
+		handler = DefaultServeMux
+	}
+	rtimeout := srv.getReadTimeout()
+	// deadline is not used here
+	for {
+		rw, err := l.Accept()
+		srv.lock.RLock()
+		if !srv.started {
+			srv.lock.RUnlock()
+			return nil
+		}
+		srv.lock.RUnlock()
+		if err != nil {
+			if neterr, ok := err.(net.Error); ok && neterr.Temporary() {
+				continue
+			}
+			return err
+		}
+		go func() {
+			m, err := reader.ReadTCP(rw, rtimeout)
+			if err != nil {
+				rw.Close()
+				return
+			}
+			srv.serve(rw.RemoteAddr(), handler, m, nil, nil, rw)
+		}()
+	}
+}
+
+// serveUDP starts a UDP listener for the server.
+// Each request is handled in a separate goroutine.
+func (srv *Server) serveUDP(l *net.UDPConn) error {
+	defer l.Close()
+
+	if srv.NotifyStartedFunc != nil {
+		srv.NotifyStartedFunc()
+	}
+
+	reader := Reader(&defaultReader{srv})
+	if srv.DecorateReader != nil {
+		reader = srv.DecorateReader(reader)
+	}
+
+	handler := srv.Handler
+	if handler == nil {
+		handler = DefaultServeMux
+	}
+	rtimeout := srv.getReadTimeout()
+	// deadline is not used here
+	for {
+		m, s, err := reader.ReadUDP(l, rtimeout)
+		srv.lock.RLock()
+		if !srv.started {
+			srv.lock.RUnlock()
+			return nil
+		}
+		srv.lock.RUnlock()
+		if err != nil {
+			if netErr, ok := err.(net.Error); ok && netErr.Temporary() {
+				continue
+			}
+			return err
+		}
+		if len(m) < headerSize {
+			continue
+		}
+		go srv.serve(s.RemoteAddr(), handler, m, l, s, nil)
+	}
+}
+
+// Serve a new connection.
+func (srv *Server) serve(a net.Addr, h Handler, m []byte, u *net.UDPConn, s *SessionUDP, t net.Conn) {
+	w := &response{tsigSecret: srv.TsigSecret, udp: u, tcp: t, remoteAddr: a, udpSession: s}
+	if srv.DecorateWriter != nil {
+		w.writer = srv.DecorateWriter(w)
+	} else {
+		w.writer = w
+	}
+
+	q := 0 // counter for the amount of TCP queries we get
+
+	reader := Reader(&defaultReader{srv})
+	if srv.DecorateReader != nil {
+		reader = srv.DecorateReader(reader)
+	}
+Redo:
+	req := new(Msg)
+	err := req.Unpack(m)
+	if err != nil { // Send a FormatError back
+		x := new(Msg)
+		x.SetRcodeFormatError(req)
+		w.WriteMsg(x)
+		goto Exit
+	}
+	if !srv.Unsafe && req.Response {
+		goto Exit
+	}
+
+	w.tsigStatus = nil
+	if w.tsigSecret != nil {
+		if t := req.IsTsig(); t != nil {
+			secret := t.Hdr.Name
+			if _, ok := w.tsigSecret[secret]; !ok {
+				w.tsigStatus = ErrKeyAlg
+			}
+			w.tsigStatus = TsigVerify(m, w.tsigSecret[secret], "", false)
+			w.tsigTimersOnly = false
+			w.tsigRequestMAC = req.Extra[len(req.Extra)-1].(*TSIG).MAC
+		}
+	}
+	h.ServeDNS(w, req) // Writes back to the client
+
+Exit:
+	if w.tcp == nil {
+		return
+	}
+	// TODO(miek): make this number configurable?
+	if q > maxTCPQueries { // close socket after this many queries
+		w.Close()
+		return
+	}
+
+	if w.hijacked {
+		return // client calls Close()
+	}
+	if u != nil { // UDP, "close" and return
+		w.Close()
+		return
+	}
+	idleTimeout := tcpIdleTimeout
+	if srv.IdleTimeout != nil {
+		idleTimeout = srv.IdleTimeout()
+	}
+	m, err = reader.ReadTCP(w.tcp, idleTimeout)
+	if err == nil {
+		q++
+		goto Redo
+	}
+	w.Close()
+	return
+}
+
+func (srv *Server) readTCP(conn net.Conn, timeout time.Duration) ([]byte, error) {
+	conn.SetReadDeadline(time.Now().Add(timeout))
+	l := make([]byte, 2)
+	n, err := conn.Read(l)
+	if err != nil || n != 2 {
+		if err != nil {
+			return nil, err
+		}
+		return nil, ErrShortRead
+	}
+	length := binary.BigEndian.Uint16(l)
+	if length == 0 {
+		return nil, ErrShortRead
+	}
+	m := make([]byte, int(length))
+	n, err = conn.Read(m[:int(length)])
+	if err != nil || n == 0 {
+		if err != nil {
+			return nil, err
+		}
+		return nil, ErrShortRead
+	}
+	i := n
+	for i < int(length) {
+		j, err := conn.Read(m[i:int(length)])
+		if err != nil {
+			return nil, err
+		}
+		i += j
+	}
+	n = i
+	m = m[:n]
+	return m, nil
+}
+
+func (srv *Server) readUDP(conn *net.UDPConn, timeout time.Duration) ([]byte, *SessionUDP, error) {
+	conn.SetReadDeadline(time.Now().Add(timeout))
+	m := make([]byte, srv.UDPSize)
+	n, s, err := ReadFromSessionUDP(conn, m)
+	if err != nil {
+		return nil, nil, err
+	}
+	m = m[:n]
+	return m, s, nil
+}
+
+// WriteMsg implements the ResponseWriter.WriteMsg method.
+func (w *response) WriteMsg(m *Msg) (err error) {
+	var data []byte
+	if w.tsigSecret != nil { // if no secrets, dont check for the tsig (which is a longer check)
+		if t := m.IsTsig(); t != nil {
+			data, w.tsigRequestMAC, err = TsigGenerate(m, w.tsigSecret[t.Hdr.Name], w.tsigRequestMAC, w.tsigTimersOnly)
+			if err != nil {
+				return err
+			}
+			_, err = w.writer.Write(data)
+			return err
+		}
+	}
+	data, err = m.Pack()
+	if err != nil {
+		return err
+	}
+	_, err = w.writer.Write(data)
+	return err
+}
+
+// Write implements the ResponseWriter.Write method.
+func (w *response) Write(m []byte) (int, error) {
+	switch {
+	case w.udp != nil:
+		n, err := WriteToSessionUDP(w.udp, m, w.udpSession)
+		return n, err
+	case w.tcp != nil:
+		lm := len(m)
+		if lm < 2 {
+			return 0, io.ErrShortBuffer
+		}
+		if lm > MaxMsgSize {
+			return 0, &Error{err: "message too large"}
+		}
+		l := make([]byte, 2, 2+lm)
+		binary.BigEndian.PutUint16(l, uint16(lm))
+		m = append(l, m...)
+
+		n, err := io.Copy(w.tcp, bytes.NewReader(m))
+		return int(n), err
+	}
+	panic("not reached")
+}
+
+// LocalAddr implements the ResponseWriter.LocalAddr method.
+func (w *response) LocalAddr() net.Addr {
+	if w.tcp != nil {
+		return w.tcp.LocalAddr()
+	}
+	return w.udp.LocalAddr()
+}
+
+// RemoteAddr implements the ResponseWriter.RemoteAddr method.
+func (w *response) RemoteAddr() net.Addr { return w.remoteAddr }
+
+// TsigStatus implements the ResponseWriter.TsigStatus method.
+func (w *response) TsigStatus() error { return w.tsigStatus }
+
+// TsigTimersOnly implements the ResponseWriter.TsigTimersOnly method.
+func (w *response) TsigTimersOnly(b bool) { w.tsigTimersOnly = b }
+
+// Hijack implements the ResponseWriter.Hijack method.
+func (w *response) Hijack() { w.hijacked = true }
+
+// Close implements the ResponseWriter.Close method
+func (w *response) Close() error {
+	// Can't close the udp conn, as that is actually the listener.
+	if w.tcp != nil {
+		e := w.tcp.Close()
+		w.tcp = nil
+		return e
+	}
+	return nil
+}
diff --git a/vendor/github.com/miekg/dns/sig0.go b/vendor/github.com/miekg/dns/sig0.go
new file mode 100644
index 0000000..f31e9e6
--- /dev/null
+++ b/vendor/github.com/miekg/dns/sig0.go
@@ -0,0 +1,218 @@
+package dns
+
+import (
+	"crypto"
+	"crypto/dsa"
+	"crypto/ecdsa"
+	"crypto/rsa"
+	"encoding/binary"
+	"math/big"
+	"strings"
+	"time"
+)
+
+// Sign signs a dns.Msg. It fills the signature with the appropriate data.
+// The SIG record should have the SignerName, KeyTag, Algorithm, Inception
+// and Expiration set.
+func (rr *SIG) Sign(k crypto.Signer, m *Msg) ([]byte, error) {
+	if k == nil {
+		return nil, ErrPrivKey
+	}
+	if rr.KeyTag == 0 || len(rr.SignerName) == 0 || rr.Algorithm == 0 {
+		return nil, ErrKey
+	}
+	rr.Header().Rrtype = TypeSIG
+	rr.Header().Class = ClassANY
+	rr.Header().Ttl = 0
+	rr.Header().Name = "."
+	rr.OrigTtl = 0
+	rr.TypeCovered = 0
+	rr.Labels = 0
+
+	buf := make([]byte, m.Len()+rr.len())
+	mbuf, err := m.PackBuffer(buf)
+	if err != nil {
+		return nil, err
+	}
+	if &buf[0] != &mbuf[0] {
+		return nil, ErrBuf
+	}
+	off, err := PackRR(rr, buf, len(mbuf), nil, false)
+	if err != nil {
+		return nil, err
+	}
+	buf = buf[:off:cap(buf)]
+
+	hash, ok := AlgorithmToHash[rr.Algorithm]
+	if !ok {
+		return nil, ErrAlg
+	}
+
+	hasher := hash.New()
+	// Write SIG rdata
+	hasher.Write(buf[len(mbuf)+1+2+2+4+2:])
+	// Write message
+	hasher.Write(buf[:len(mbuf)])
+
+	signature, err := sign(k, hasher.Sum(nil), hash, rr.Algorithm)
+	if err != nil {
+		return nil, err
+	}
+
+	rr.Signature = toBase64(signature)
+
+	buf = append(buf, signature...)
+	if len(buf) > int(^uint16(0)) {
+		return nil, ErrBuf
+	}
+	// Adjust sig data length
+	rdoff := len(mbuf) + 1 + 2 + 2 + 4
+	rdlen := binary.BigEndian.Uint16(buf[rdoff:])
+	rdlen += uint16(len(signature))
+	binary.BigEndian.PutUint16(buf[rdoff:], rdlen)
+	// Adjust additional count
+	adc := binary.BigEndian.Uint16(buf[10:])
+	adc++
+	binary.BigEndian.PutUint16(buf[10:], adc)
+	return buf, nil
+}
+
+// Verify validates the message buf using the key k.
+// It's assumed that buf is a valid message from which rr was unpacked.
+func (rr *SIG) Verify(k *KEY, buf []byte) error {
+	if k == nil {
+		return ErrKey
+	}
+	if rr.KeyTag == 0 || len(rr.SignerName) == 0 || rr.Algorithm == 0 {
+		return ErrKey
+	}
+
+	var hash crypto.Hash
+	switch rr.Algorithm {
+	case DSA, RSASHA1:
+		hash = crypto.SHA1
+	case RSASHA256, ECDSAP256SHA256:
+		hash = crypto.SHA256
+	case ECDSAP384SHA384:
+		hash = crypto.SHA384
+	case RSASHA512:
+		hash = crypto.SHA512
+	default:
+		return ErrAlg
+	}
+	hasher := hash.New()
+
+	buflen := len(buf)
+	qdc := binary.BigEndian.Uint16(buf[4:])
+	anc := binary.BigEndian.Uint16(buf[6:])
+	auc := binary.BigEndian.Uint16(buf[8:])
+	adc := binary.BigEndian.Uint16(buf[10:])
+	offset := 12
+	var err error
+	for i := uint16(0); i < qdc && offset < buflen; i++ {
+		_, offset, err = UnpackDomainName(buf, offset)
+		if err != nil {
+			return err
+		}
+		// Skip past Type and Class
+		offset += 2 + 2
+	}
+	for i := uint16(1); i < anc+auc+adc && offset < buflen; i++ {
+		_, offset, err = UnpackDomainName(buf, offset)
+		if err != nil {
+			return err
+		}
+		// Skip past Type, Class and TTL
+		offset += 2 + 2 + 4
+		if offset+1 >= buflen {
+			continue
+		}
+		var rdlen uint16
+		rdlen = binary.BigEndian.Uint16(buf[offset:])
+		offset += 2
+		offset += int(rdlen)
+	}
+	if offset >= buflen {
+		return &Error{err: "overflowing unpacking signed message"}
+	}
+
+	// offset should be just prior to SIG
+	bodyend := offset
+	// owner name SHOULD be root
+	_, offset, err = UnpackDomainName(buf, offset)
+	if err != nil {
+		return err
+	}
+	// Skip Type, Class, TTL, RDLen
+	offset += 2 + 2 + 4 + 2
+	sigstart := offset
+	// Skip Type Covered, Algorithm, Labels, Original TTL
+	offset += 2 + 1 + 1 + 4
+	if offset+4+4 >= buflen {
+		return &Error{err: "overflow unpacking signed message"}
+	}
+	expire := binary.BigEndian.Uint32(buf[offset:])
+	offset += 4
+	incept := binary.BigEndian.Uint32(buf[offset:])
+	offset += 4
+	now := uint32(time.Now().Unix())
+	if now < incept || now > expire {
+		return ErrTime
+	}
+	// Skip key tag
+	offset += 2
+	var signername string
+	signername, offset, err = UnpackDomainName(buf, offset)
+	if err != nil {
+		return err
+	}
+	// If key has come from the DNS name compression might
+	// have mangled the case of the name
+	if strings.ToLower(signername) != strings.ToLower(k.Header().Name) {
+		return &Error{err: "signer name doesn't match key name"}
+	}
+	sigend := offset
+	hasher.Write(buf[sigstart:sigend])
+	hasher.Write(buf[:10])
+	hasher.Write([]byte{
+		byte((adc - 1) << 8),
+		byte(adc - 1),
+	})
+	hasher.Write(buf[12:bodyend])
+
+	hashed := hasher.Sum(nil)
+	sig := buf[sigend:]
+	switch k.Algorithm {
+	case DSA:
+		pk := k.publicKeyDSA()
+		sig = sig[1:]
+		r := big.NewInt(0)
+		r.SetBytes(sig[:len(sig)/2])
+		s := big.NewInt(0)
+		s.SetBytes(sig[len(sig)/2:])
+		if pk != nil {
+			if dsa.Verify(pk, hashed, r, s) {
+				return nil
+			}
+			return ErrSig
+		}
+	case RSASHA1, RSASHA256, RSASHA512:
+		pk := k.publicKeyRSA()
+		if pk != nil {
+			return rsa.VerifyPKCS1v15(pk, hash, hashed, sig)
+		}
+	case ECDSAP256SHA256, ECDSAP384SHA384:
+		pk := k.publicKeyECDSA()
+		r := big.NewInt(0)
+		r.SetBytes(sig[:len(sig)/2])
+		s := big.NewInt(0)
+		s.SetBytes(sig[len(sig)/2:])
+		if pk != nil {
+			if ecdsa.Verify(pk, hashed, r, s) {
+				return nil
+			}
+			return ErrSig
+		}
+	}
+	return ErrKeyAlg
+}
diff --git a/vendor/github.com/miekg/dns/singleinflight.go b/vendor/github.com/miekg/dns/singleinflight.go
new file mode 100644
index 0000000..9573c7d
--- /dev/null
+++ b/vendor/github.com/miekg/dns/singleinflight.go
@@ -0,0 +1,57 @@
+// Copyright 2013 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Adapted for dns package usage by Miek Gieben.
+
+package dns
+
+import "sync"
+import "time"
+
+// call is an in-flight or completed singleflight.Do call
+type call struct {
+	wg   sync.WaitGroup
+	val  *Msg
+	rtt  time.Duration
+	err  error
+	dups int
+}
+
+// singleflight represents a class of work and forms a namespace in
+// which units of work can be executed with duplicate suppression.
+type singleflight struct {
+	sync.Mutex                  // protects m
+	m          map[string]*call // lazily initialized
+}
+
+// Do executes and returns the results of the given function, making
+// sure that only one execution is in-flight for a given key at a
+// time. If a duplicate comes in, the duplicate caller waits for the
+// original to complete and receives the same results.
+// The return value shared indicates whether v was given to multiple callers.
+func (g *singleflight) Do(key string, fn func() (*Msg, time.Duration, error)) (v *Msg, rtt time.Duration, err error, shared bool) {
+	g.Lock()
+	if g.m == nil {
+		g.m = make(map[string]*call)
+	}
+	if c, ok := g.m[key]; ok {
+		c.dups++
+		g.Unlock()
+		c.wg.Wait()
+		return c.val, c.rtt, c.err, true
+	}
+	c := new(call)
+	c.wg.Add(1)
+	g.m[key] = c
+	g.Unlock()
+
+	c.val, c.rtt, c.err = fn()
+	c.wg.Done()
+
+	g.Lock()
+	delete(g.m, key)
+	g.Unlock()
+
+	return c.val, c.rtt, c.err, c.dups > 0
+}
diff --git a/vendor/github.com/miekg/dns/smimea.go b/vendor/github.com/miekg/dns/smimea.go
new file mode 100644
index 0000000..4e7ded4
--- /dev/null
+++ b/vendor/github.com/miekg/dns/smimea.go
@@ -0,0 +1,47 @@
+package dns
+
+import (
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/hex"
+)
+
+// Sign creates a SMIMEA record from an SSL certificate.
+func (r *SMIMEA) Sign(usage, selector, matchingType int, cert *x509.Certificate) (err error) {
+	r.Hdr.Rrtype = TypeSMIMEA
+	r.Usage = uint8(usage)
+	r.Selector = uint8(selector)
+	r.MatchingType = uint8(matchingType)
+
+	r.Certificate, err = CertificateToDANE(r.Selector, r.MatchingType, cert)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Verify verifies a SMIMEA record against an SSL certificate. If it is OK
+// a nil error is returned.
+func (r *SMIMEA) Verify(cert *x509.Certificate) error {
+	c, err := CertificateToDANE(r.Selector, r.MatchingType, cert)
+	if err != nil {
+		return err // Not also ErrSig?
+	}
+	if r.Certificate == c {
+		return nil
+	}
+	return ErrSig // ErrSig, really?
+}
+
+// SMIMEAName returns the ownername of a SMIMEA resource record as per the
+// format specified in RFC 'draft-ietf-dane-smime-12' Section 2 and 3
+func SMIMEAName(email, domain string) (string, error) {
+	hasher := sha256.New()
+	hasher.Write([]byte(email))
+
+	// RFC Section 3: "The local-part is hashed using the SHA2-256
+	// algorithm with the hash truncated to 28 octets and
+	// represented in its hexadecimal representation to become the
+	// left-most label in the prepared domain name"
+	return hex.EncodeToString(hasher.Sum(nil)[:28]) + "." + "_smimecert." + domain, nil
+}
diff --git a/vendor/github.com/miekg/dns/tlsa.go b/vendor/github.com/miekg/dns/tlsa.go
new file mode 100644
index 0000000..431e2fb
--- /dev/null
+++ b/vendor/github.com/miekg/dns/tlsa.go
@@ -0,0 +1,47 @@
+package dns
+
+import (
+	"crypto/x509"
+	"net"
+	"strconv"
+)
+
+// Sign creates a TLSA record from an SSL certificate.
+func (r *TLSA) Sign(usage, selector, matchingType int, cert *x509.Certificate) (err error) {
+	r.Hdr.Rrtype = TypeTLSA
+	r.Usage = uint8(usage)
+	r.Selector = uint8(selector)
+	r.MatchingType = uint8(matchingType)
+
+	r.Certificate, err = CertificateToDANE(r.Selector, r.MatchingType, cert)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Verify verifies a TLSA record against an SSL certificate. If it is OK
+// a nil error is returned.
+func (r *TLSA) Verify(cert *x509.Certificate) error {
+	c, err := CertificateToDANE(r.Selector, r.MatchingType, cert)
+	if err != nil {
+		return err // Not also ErrSig?
+	}
+	if r.Certificate == c {
+		return nil
+	}
+	return ErrSig // ErrSig, really?
+}
+
+// TLSAName returns the ownername of a TLSA resource record as per the
+// rules specified in RFC 6698, Section 3.
+func TLSAName(name, service, network string) (string, error) {
+	if !IsFqdn(name) {
+		return "", ErrFqdn
+	}
+	p, err := net.LookupPort(network, service)
+	if err != nil {
+		return "", err
+	}
+	return "_" + strconv.Itoa(p) + "._" + network + "." + name, nil
+}
diff --git a/vendor/github.com/miekg/dns/tsig.go b/vendor/github.com/miekg/dns/tsig.go
new file mode 100644
index 0000000..4837b4a
--- /dev/null
+++ b/vendor/github.com/miekg/dns/tsig.go
@@ -0,0 +1,386 @@
+package dns
+
+import (
+	"crypto/hmac"
+	"crypto/md5"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/binary"
+	"encoding/hex"
+	"hash"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// HMAC hashing codes. These are transmitted as domain names.
+const (
+	HmacMD5    = "hmac-md5.sig-alg.reg.int."
+	HmacSHA1   = "hmac-sha1."
+	HmacSHA256 = "hmac-sha256."
+	HmacSHA512 = "hmac-sha512."
+)
+
+// TSIG is the RR the holds the transaction signature of a message.
+// See RFC 2845 and RFC 4635.
+type TSIG struct {
+	Hdr        RR_Header
+	Algorithm  string `dns:"domain-name"`
+	TimeSigned uint64 `dns:"uint48"`
+	Fudge      uint16
+	MACSize    uint16
+	MAC        string `dns:"size-hex:MACSize"`
+	OrigId     uint16
+	Error      uint16
+	OtherLen   uint16
+	OtherData  string `dns:"size-hex:OtherLen"`
+}
+
+// TSIG has no official presentation format, but this will suffice.
+
+func (rr *TSIG) String() string {
+	s := "\n;; TSIG PSEUDOSECTION:\n"
+	s += rr.Hdr.String() +
+		" " + rr.Algorithm +
+		" " + tsigTimeToString(rr.TimeSigned) +
+		" " + strconv.Itoa(int(rr.Fudge)) +
+		" " + strconv.Itoa(int(rr.MACSize)) +
+		" " + strings.ToUpper(rr.MAC) +
+		" " + strconv.Itoa(int(rr.OrigId)) +
+		" " + strconv.Itoa(int(rr.Error)) + // BIND prints NOERROR
+		" " + strconv.Itoa(int(rr.OtherLen)) +
+		" " + rr.OtherData
+	return s
+}
+
+// The following values must be put in wireformat, so that the MAC can be calculated.
+// RFC 2845, section 3.4.2. TSIG Variables.
+type tsigWireFmt struct {
+	// From RR_Header
+	Name  string `dns:"domain-name"`
+	Class uint16
+	Ttl   uint32
+	// Rdata of the TSIG
+	Algorithm  string `dns:"domain-name"`
+	TimeSigned uint64 `dns:"uint48"`
+	Fudge      uint16
+	// MACSize, MAC and OrigId excluded
+	Error     uint16
+	OtherLen  uint16
+	OtherData string `dns:"size-hex:OtherLen"`
+}
+
+// If we have the MAC use this type to convert it to wiredata. Section 3.4.3. Request MAC
+type macWireFmt struct {
+	MACSize uint16
+	MAC     string `dns:"size-hex:MACSize"`
+}
+
+// 3.3. Time values used in TSIG calculations
+type timerWireFmt struct {
+	TimeSigned uint64 `dns:"uint48"`
+	Fudge      uint16
+}
+
+// TsigGenerate fills out the TSIG record attached to the message.
+// The message should contain
+// a "stub" TSIG RR with the algorithm, key name (owner name of the RR),
+// time fudge (defaults to 300 seconds) and the current time
+// The TSIG MAC is saved in that Tsig RR.
+// When TsigGenerate is called for the first time requestMAC is set to the empty string and
+// timersOnly is false.
+// If something goes wrong an error is returned, otherwise it is nil.
+func TsigGenerate(m *Msg, secret, requestMAC string, timersOnly bool) ([]byte, string, error) {
+	if m.IsTsig() == nil {
+		panic("dns: TSIG not last RR in additional")
+	}
+	// If we barf here, the caller is to blame
+	rawsecret, err := fromBase64([]byte(secret))
+	if err != nil {
+		return nil, "", err
+	}
+
+	rr := m.Extra[len(m.Extra)-1].(*TSIG)
+	m.Extra = m.Extra[0 : len(m.Extra)-1] // kill the TSIG from the msg
+	mbuf, err := m.Pack()
+	if err != nil {
+		return nil, "", err
+	}
+	buf := tsigBuffer(mbuf, rr, requestMAC, timersOnly)
+
+	t := new(TSIG)
+	var h hash.Hash
+	switch strings.ToLower(rr.Algorithm) {
+	case HmacMD5:
+		h = hmac.New(md5.New, []byte(rawsecret))
+	case HmacSHA1:
+		h = hmac.New(sha1.New, []byte(rawsecret))
+	case HmacSHA256:
+		h = hmac.New(sha256.New, []byte(rawsecret))
+	case HmacSHA512:
+		h = hmac.New(sha512.New, []byte(rawsecret))
+	default:
+		return nil, "", ErrKeyAlg
+	}
+	h.Write(buf)
+	t.MAC = hex.EncodeToString(h.Sum(nil))
+	t.MACSize = uint16(len(t.MAC) / 2) // Size is half!
+
+	t.Hdr = RR_Header{Name: rr.Hdr.Name, Rrtype: TypeTSIG, Class: ClassANY, Ttl: 0}
+	t.Fudge = rr.Fudge
+	t.TimeSigned = rr.TimeSigned
+	t.Algorithm = rr.Algorithm
+	t.OrigId = m.Id
+
+	tbuf := make([]byte, t.len())
+	if off, err := PackRR(t, tbuf, 0, nil, false); err == nil {
+		tbuf = tbuf[:off] // reset to actual size used
+	} else {
+		return nil, "", err
+	}
+	mbuf = append(mbuf, tbuf...)
+	// Update the ArCount directly in the buffer.
+	binary.BigEndian.PutUint16(mbuf[10:], uint16(len(m.Extra)+1))
+
+	return mbuf, t.MAC, nil
+}
+
+// TsigVerify verifies the TSIG on a message.
+// If the signature does not validate err contains the
+// error, otherwise it is nil.
+func TsigVerify(msg []byte, secret, requestMAC string, timersOnly bool) error {
+	rawsecret, err := fromBase64([]byte(secret))
+	if err != nil {
+		return err
+	}
+	// Strip the TSIG from the incoming msg
+	stripped, tsig, err := stripTsig(msg)
+	if err != nil {
+		return err
+	}
+
+	msgMAC, err := hex.DecodeString(tsig.MAC)
+	if err != nil {
+		return err
+	}
+
+	buf := tsigBuffer(stripped, tsig, requestMAC, timersOnly)
+
+	// Fudge factor works both ways. A message can arrive before it was signed because
+	// of clock skew.
+	now := uint64(time.Now().Unix())
+	ti := now - tsig.TimeSigned
+	if now < tsig.TimeSigned {
+		ti = tsig.TimeSigned - now
+	}
+	if uint64(tsig.Fudge) < ti {
+		return ErrTime
+	}
+
+	var h hash.Hash
+	switch strings.ToLower(tsig.Algorithm) {
+	case HmacMD5:
+		h = hmac.New(md5.New, rawsecret)
+	case HmacSHA1:
+		h = hmac.New(sha1.New, rawsecret)
+	case HmacSHA256:
+		h = hmac.New(sha256.New, rawsecret)
+	case HmacSHA512:
+		h = hmac.New(sha512.New, rawsecret)
+	default:
+		return ErrKeyAlg
+	}
+	h.Write(buf)
+	if !hmac.Equal(h.Sum(nil), msgMAC) {
+		return ErrSig
+	}
+	return nil
+}
+
+// Create a wiredata buffer for the MAC calculation.
+func tsigBuffer(msgbuf []byte, rr *TSIG, requestMAC string, timersOnly bool) []byte {
+	var buf []byte
+	if rr.TimeSigned == 0 {
+		rr.TimeSigned = uint64(time.Now().Unix())
+	}
+	if rr.Fudge == 0 {
+		rr.Fudge = 300 // Standard (RFC) default.
+	}
+
+	// Replace message ID in header with original ID from TSIG
+	binary.BigEndian.PutUint16(msgbuf[0:2], rr.OrigId)
+
+	if requestMAC != "" {
+		m := new(macWireFmt)
+		m.MACSize = uint16(len(requestMAC) / 2)
+		m.MAC = requestMAC
+		buf = make([]byte, len(requestMAC)) // long enough
+		n, _ := packMacWire(m, buf)
+		buf = buf[:n]
+	}
+
+	tsigvar := make([]byte, DefaultMsgSize)
+	if timersOnly {
+		tsig := new(timerWireFmt)
+		tsig.TimeSigned = rr.TimeSigned
+		tsig.Fudge = rr.Fudge
+		n, _ := packTimerWire(tsig, tsigvar)
+		tsigvar = tsigvar[:n]
+	} else {
+		tsig := new(tsigWireFmt)
+		tsig.Name = strings.ToLower(rr.Hdr.Name)
+		tsig.Class = ClassANY
+		tsig.Ttl = rr.Hdr.Ttl
+		tsig.Algorithm = strings.ToLower(rr.Algorithm)
+		tsig.TimeSigned = rr.TimeSigned
+		tsig.Fudge = rr.Fudge
+		tsig.Error = rr.Error
+		tsig.OtherLen = rr.OtherLen
+		tsig.OtherData = rr.OtherData
+		n, _ := packTsigWire(tsig, tsigvar)
+		tsigvar = tsigvar[:n]
+	}
+
+	if requestMAC != "" {
+		x := append(buf, msgbuf...)
+		buf = append(x, tsigvar...)
+	} else {
+		buf = append(msgbuf, tsigvar...)
+	}
+	return buf
+}
+
+// Strip the TSIG from the raw message.
+func stripTsig(msg []byte) ([]byte, *TSIG, error) {
+	// Copied from msg.go's Unpack() Header, but modified.
+	var (
+		dh  Header
+		err error
+	)
+	off, tsigoff := 0, 0
+
+	if dh, off, err = unpackMsgHdr(msg, off); err != nil {
+		return nil, nil, err
+	}
+	if dh.Arcount == 0 {
+		return nil, nil, ErrNoSig
+	}
+
+	// Rcode, see msg.go Unpack()
+	if int(dh.Bits&0xF) == RcodeNotAuth {
+		return nil, nil, ErrAuth
+	}
+
+	for i := 0; i < int(dh.Qdcount); i++ {
+		_, off, err = unpackQuestion(msg, off)
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	_, off, err = unpackRRslice(int(dh.Ancount), msg, off)
+	if err != nil {
+		return nil, nil, err
+	}
+	_, off, err = unpackRRslice(int(dh.Nscount), msg, off)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	rr := new(TSIG)
+	var extra RR
+	for i := 0; i < int(dh.Arcount); i++ {
+		tsigoff = off
+		extra, off, err = UnpackRR(msg, off)
+		if err != nil {
+			return nil, nil, err
+		}
+		if extra.Header().Rrtype == TypeTSIG {
+			rr = extra.(*TSIG)
+			// Adjust Arcount.
+			arcount := binary.BigEndian.Uint16(msg[10:])
+			binary.BigEndian.PutUint16(msg[10:], arcount-1)
+			break
+		}
+	}
+	if rr == nil {
+		return nil, nil, ErrNoSig
+	}
+	return msg[:tsigoff], rr, nil
+}
+
+// Translate the TSIG time signed into a date. There is no
+// need for RFC1982 calculations as this date is 48 bits.
+func tsigTimeToString(t uint64) string {
+	ti := time.Unix(int64(t), 0).UTC()
+	return ti.Format("20060102150405")
+}
+
+func packTsigWire(tw *tsigWireFmt, msg []byte) (int, error) {
+	// copied from zmsg.go TSIG packing
+	// RR_Header
+	off, err := PackDomainName(tw.Name, msg, 0, nil, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(tw.Class, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(tw.Ttl, msg, off)
+	if err != nil {
+		return off, err
+	}
+
+	off, err = PackDomainName(tw.Algorithm, msg, off, nil, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint48(tw.TimeSigned, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(tw.Fudge, msg, off)
+	if err != nil {
+		return off, err
+	}
+
+	off, err = packUint16(tw.Error, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(tw.OtherLen, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(tw.OtherData, msg, off)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
+
+func packMacWire(mw *macWireFmt, msg []byte) (int, error) {
+	off, err := packUint16(mw.MACSize, msg, 0)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(mw.MAC, msg, off)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
+
+func packTimerWire(tw *timerWireFmt, msg []byte) (int, error) {
+	off, err := packUint48(tw.TimeSigned, msg, 0)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(tw.Fudge, msg, off)
+	if err != nil {
+		return off, err
+	}
+	return off, nil
+}
diff --git a/vendor/github.com/miekg/dns/types.go b/vendor/github.com/miekg/dns/types.go
new file mode 100644
index 0000000..a779ca8
--- /dev/null
+++ b/vendor/github.com/miekg/dns/types.go
@@ -0,0 +1,1381 @@
+package dns
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type (
+	// Type is a DNS type.
+	Type uint16
+	// Class is a DNS class.
+	Class uint16
+	// Name is a DNS domain name.
+	Name string
+)
+
+// Packet formats
+
+// Wire constants and supported types.
+const (
+	// valid RR_Header.Rrtype and Question.qtype
+
+	TypeNone       uint16 = 0
+	TypeA          uint16 = 1
+	TypeNS         uint16 = 2
+	TypeMD         uint16 = 3
+	TypeMF         uint16 = 4
+	TypeCNAME      uint16 = 5
+	TypeSOA        uint16 = 6
+	TypeMB         uint16 = 7
+	TypeMG         uint16 = 8
+	TypeMR         uint16 = 9
+	TypeNULL       uint16 = 10
+	TypePTR        uint16 = 12
+	TypeHINFO      uint16 = 13
+	TypeMINFO      uint16 = 14
+	TypeMX         uint16 = 15
+	TypeTXT        uint16 = 16
+	TypeRP         uint16 = 17
+	TypeAFSDB      uint16 = 18
+	TypeX25        uint16 = 19
+	TypeISDN       uint16 = 20
+	TypeRT         uint16 = 21
+	TypeNSAPPTR    uint16 = 23
+	TypeSIG        uint16 = 24
+	TypeKEY        uint16 = 25
+	TypePX         uint16 = 26
+	TypeGPOS       uint16 = 27
+	TypeAAAA       uint16 = 28
+	TypeLOC        uint16 = 29
+	TypeNXT        uint16 = 30
+	TypeEID        uint16 = 31
+	TypeNIMLOC     uint16 = 32
+	TypeSRV        uint16 = 33
+	TypeATMA       uint16 = 34
+	TypeNAPTR      uint16 = 35
+	TypeKX         uint16 = 36
+	TypeCERT       uint16 = 37
+	TypeDNAME      uint16 = 39
+	TypeOPT        uint16 = 41 // EDNS
+	TypeDS         uint16 = 43
+	TypeSSHFP      uint16 = 44
+	TypeRRSIG      uint16 = 46
+	TypeNSEC       uint16 = 47
+	TypeDNSKEY     uint16 = 48
+	TypeDHCID      uint16 = 49
+	TypeNSEC3      uint16 = 50
+	TypeNSEC3PARAM uint16 = 51
+	TypeTLSA       uint16 = 52
+	TypeSMIMEA     uint16 = 53
+	TypeHIP        uint16 = 55
+	TypeNINFO      uint16 = 56
+	TypeRKEY       uint16 = 57
+	TypeTALINK     uint16 = 58
+	TypeCDS        uint16 = 59
+	TypeCDNSKEY    uint16 = 60
+	TypeOPENPGPKEY uint16 = 61
+	TypeCSYNC      uint16 = 62
+	TypeSPF        uint16 = 99
+	TypeUINFO      uint16 = 100
+	TypeUID        uint16 = 101
+	TypeGID        uint16 = 102
+	TypeUNSPEC     uint16 = 103
+	TypeNID        uint16 = 104
+	TypeL32        uint16 = 105
+	TypeL64        uint16 = 106
+	TypeLP         uint16 = 107
+	TypeEUI48      uint16 = 108
+	TypeEUI64      uint16 = 109
+	TypeURI        uint16 = 256
+	TypeCAA        uint16 = 257
+	TypeAVC        uint16 = 258
+
+	TypeTKEY uint16 = 249
+	TypeTSIG uint16 = 250
+
+	// valid Question.Qtype only
+	TypeIXFR  uint16 = 251
+	TypeAXFR  uint16 = 252
+	TypeMAILB uint16 = 253
+	TypeMAILA uint16 = 254
+	TypeANY   uint16 = 255
+
+	TypeTA       uint16 = 32768
+	TypeDLV      uint16 = 32769
+	TypeReserved uint16 = 65535
+
+	// valid Question.Qclass
+	ClassINET   = 1
+	ClassCSNET  = 2
+	ClassCHAOS  = 3
+	ClassHESIOD = 4
+	ClassNONE   = 254
+	ClassANY    = 255
+
+	// Message Response Codes, see https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml
+	RcodeSuccess        = 0  // NoError   - No Error                          [DNS]
+	RcodeFormatError    = 1  // FormErr   - Format Error                      [DNS]
+	RcodeServerFailure  = 2  // ServFail  - Server Failure                    [DNS]
+	RcodeNameError      = 3  // NXDomain  - Non-Existent Domain               [DNS]
+	RcodeNotImplemented = 4  // NotImp    - Not Implemented                   [DNS]
+	RcodeRefused        = 5  // Refused   - Query Refused                     [DNS]
+	RcodeYXDomain       = 6  // YXDomain  - Name Exists when it should not    [DNS Update]
+	RcodeYXRrset        = 7  // YXRRSet   - RR Set Exists when it should not  [DNS Update]
+	RcodeNXRrset        = 8  // NXRRSet   - RR Set that should exist does not [DNS Update]
+	RcodeNotAuth        = 9  // NotAuth   - Server Not Authoritative for zone [DNS Update]
+	RcodeNotZone        = 10 // NotZone   - Name not contained in zone        [DNS Update/TSIG]
+	RcodeBadSig         = 16 // BADSIG    - TSIG Signature Failure            [TSIG]
+	RcodeBadVers        = 16 // BADVERS   - Bad OPT Version                   [EDNS0]
+	RcodeBadKey         = 17 // BADKEY    - Key not recognized                [TSIG]
+	RcodeBadTime        = 18 // BADTIME   - Signature out of time window      [TSIG]
+	RcodeBadMode        = 19 // BADMODE   - Bad TKEY Mode                     [TKEY]
+	RcodeBadName        = 20 // BADNAME   - Duplicate key name                [TKEY]
+	RcodeBadAlg         = 21 // BADALG    - Algorithm not supported           [TKEY]
+	RcodeBadTrunc       = 22 // BADTRUNC  - Bad Truncation                    [TSIG]
+	RcodeBadCookie      = 23 // BADCOOKIE - Bad/missing Server Cookie         [DNS Cookies]
+
+	// Message Opcodes. There is no 3.
+	OpcodeQuery  = 0
+	OpcodeIQuery = 1
+	OpcodeStatus = 2
+	OpcodeNotify = 4
+	OpcodeUpdate = 5
+)
+
+// Header is the wire format for the DNS packet header.
+type Header struct {
+	Id                                 uint16
+	Bits                               uint16
+	Qdcount, Ancount, Nscount, Arcount uint16
+}
+
+const (
+	headerSize = 12
+
+	// Header.Bits
+	_QR = 1 << 15 // query/response (response=1)
+	_AA = 1 << 10 // authoritative
+	_TC = 1 << 9  // truncated
+	_RD = 1 << 8  // recursion desired
+	_RA = 1 << 7  // recursion available
+	_Z  = 1 << 6  // Z
+	_AD = 1 << 5  // authticated data
+	_CD = 1 << 4  // checking disabled
+)
+
+// Various constants used in the LOC RR, See RFC 1887.
+const (
+	LOC_EQUATOR       = 1 << 31 // RFC 1876, Section 2.
+	LOC_PRIMEMERIDIAN = 1 << 31 // RFC 1876, Section 2.
+	LOC_HOURS         = 60 * 1000
+	LOC_DEGREES       = 60 * LOC_HOURS
+	LOC_ALTITUDEBASE  = 100000
+)
+
+// Different Certificate Types, see RFC 4398, Section 2.1
+const (
+	CertPKIX = 1 + iota
+	CertSPKI
+	CertPGP
+	CertIPIX
+	CertISPKI
+	CertIPGP
+	CertACPKIX
+	CertIACPKIX
+	CertURI = 253
+	CertOID = 254
+)
+
+// CertTypeToString converts the Cert Type to its string representation.
+// See RFC 4398 and RFC 6944.
+var CertTypeToString = map[uint16]string{
+	CertPKIX:    "PKIX",
+	CertSPKI:    "SPKI",
+	CertPGP:     "PGP",
+	CertIPIX:    "IPIX",
+	CertISPKI:   "ISPKI",
+	CertIPGP:    "IPGP",
+	CertACPKIX:  "ACPKIX",
+	CertIACPKIX: "IACPKIX",
+	CertURI:     "URI",
+	CertOID:     "OID",
+}
+
+// StringToCertType is the reverseof CertTypeToString.
+var StringToCertType = reverseInt16(CertTypeToString)
+
+//go:generate go run types_generate.go
+
+// Question holds a DNS question. There can be multiple questions in the
+// question section of a message. Usually there is just one.
+type Question struct {
+	Name   string `dns:"cdomain-name"` // "cdomain-name" specifies encoding (and may be compressed)
+	Qtype  uint16
+	Qclass uint16
+}
+
+func (q *Question) len() int {
+	return len(q.Name) + 1 + 2 + 2
+}
+
+func (q *Question) String() (s string) {
+	// prefix with ; (as in dig)
+	s = ";" + sprintName(q.Name) + "\t"
+	s += Class(q.Qclass).String() + "\t"
+	s += " " + Type(q.Qtype).String()
+	return s
+}
+
+// ANY is a wildcard record. See RFC 1035, Section 3.2.3. ANY
+// is named "*" there.
+type ANY struct {
+	Hdr RR_Header
+	// Does not have any rdata
+}
+
+func (rr *ANY) String() string { return rr.Hdr.String() }
+
+// CNAME RR. See RFC 1034.
+type CNAME struct {
+	Hdr    RR_Header
+	Target string `dns:"cdomain-name"`
+}
+
+func (rr *CNAME) String() string { return rr.Hdr.String() + sprintName(rr.Target) }
+
+// HINFO RR. See RFC 1034.
+type HINFO struct {
+	Hdr RR_Header
+	Cpu string
+	Os  string
+}
+
+func (rr *HINFO) String() string {
+	return rr.Hdr.String() + sprintTxt([]string{rr.Cpu, rr.Os})
+}
+
+// MB RR. See RFC 1035.
+type MB struct {
+	Hdr RR_Header
+	Mb  string `dns:"cdomain-name"`
+}
+
+func (rr *MB) String() string { return rr.Hdr.String() + sprintName(rr.Mb) }
+
+// MG RR. See RFC 1035.
+type MG struct {
+	Hdr RR_Header
+	Mg  string `dns:"cdomain-name"`
+}
+
+func (rr *MG) String() string { return rr.Hdr.String() + sprintName(rr.Mg) }
+
+// MINFO RR. See RFC 1035.
+type MINFO struct {
+	Hdr   RR_Header
+	Rmail string `dns:"cdomain-name"`
+	Email string `dns:"cdomain-name"`
+}
+
+func (rr *MINFO) String() string {
+	return rr.Hdr.String() + sprintName(rr.Rmail) + " " + sprintName(rr.Email)
+}
+
+// MR RR. See RFC 1035.
+type MR struct {
+	Hdr RR_Header
+	Mr  string `dns:"cdomain-name"`
+}
+
+func (rr *MR) String() string {
+	return rr.Hdr.String() + sprintName(rr.Mr)
+}
+
+// MF RR. See RFC 1035.
+type MF struct {
+	Hdr RR_Header
+	Mf  string `dns:"cdomain-name"`
+}
+
+func (rr *MF) String() string {
+	return rr.Hdr.String() + sprintName(rr.Mf)
+}
+
+// MD RR. See RFC 1035.
+type MD struct {
+	Hdr RR_Header
+	Md  string `dns:"cdomain-name"`
+}
+
+func (rr *MD) String() string {
+	return rr.Hdr.String() + sprintName(rr.Md)
+}
+
+// MX RR. See RFC 1035.
+type MX struct {
+	Hdr        RR_Header
+	Preference uint16
+	Mx         string `dns:"cdomain-name"`
+}
+
+func (rr *MX) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Mx)
+}
+
+// AFSDB RR. See RFC 1183.
+type AFSDB struct {
+	Hdr      RR_Header
+	Subtype  uint16
+	Hostname string `dns:"cdomain-name"`
+}
+
+func (rr *AFSDB) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Subtype)) + " " + sprintName(rr.Hostname)
+}
+
+// X25 RR. See RFC 1183, Section 3.1.
+type X25 struct {
+	Hdr         RR_Header
+	PSDNAddress string
+}
+
+func (rr *X25) String() string {
+	return rr.Hdr.String() + rr.PSDNAddress
+}
+
+// RT RR. See RFC 1183, Section 3.3.
+type RT struct {
+	Hdr        RR_Header
+	Preference uint16
+	Host       string `dns:"cdomain-name"`
+}
+
+func (rr *RT) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Host)
+}
+
+// NS RR. See RFC 1035.
+type NS struct {
+	Hdr RR_Header
+	Ns  string `dns:"cdomain-name"`
+}
+
+func (rr *NS) String() string {
+	return rr.Hdr.String() + sprintName(rr.Ns)
+}
+
+// PTR RR. See RFC 1035.
+type PTR struct {
+	Hdr RR_Header
+	Ptr string `dns:"cdomain-name"`
+}
+
+func (rr *PTR) String() string {
+	return rr.Hdr.String() + sprintName(rr.Ptr)
+}
+
+// RP RR. See RFC 1138, Section 2.2.
+type RP struct {
+	Hdr  RR_Header
+	Mbox string `dns:"domain-name"`
+	Txt  string `dns:"domain-name"`
+}
+
+func (rr *RP) String() string {
+	return rr.Hdr.String() + rr.Mbox + " " + sprintTxt([]string{rr.Txt})
+}
+
+// SOA RR. See RFC 1035.
+type SOA struct {
+	Hdr     RR_Header
+	Ns      string `dns:"cdomain-name"`
+	Mbox    string `dns:"cdomain-name"`
+	Serial  uint32
+	Refresh uint32
+	Retry   uint32
+	Expire  uint32
+	Minttl  uint32
+}
+
+func (rr *SOA) String() string {
+	return rr.Hdr.String() + sprintName(rr.Ns) + " " + sprintName(rr.Mbox) +
+		" " + strconv.FormatInt(int64(rr.Serial), 10) +
+		" " + strconv.FormatInt(int64(rr.Refresh), 10) +
+		" " + strconv.FormatInt(int64(rr.Retry), 10) +
+		" " + strconv.FormatInt(int64(rr.Expire), 10) +
+		" " + strconv.FormatInt(int64(rr.Minttl), 10)
+}
+
+// TXT RR. See RFC 1035.
+type TXT struct {
+	Hdr RR_Header
+	Txt []string `dns:"txt"`
+}
+
+func (rr *TXT) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) }
+
+func sprintName(s string) string {
+	src := []byte(s)
+	dst := make([]byte, 0, len(src))
+	for i := 0; i < len(src); {
+		if i+1 < len(src) && src[i] == '\\' && src[i+1] == '.' {
+			dst = append(dst, src[i:i+2]...)
+			i += 2
+		} else {
+			b, n := nextByte(src, i)
+			if n == 0 {
+				i++ // dangling back slash
+			} else if b == '.' {
+				dst = append(dst, b)
+			} else {
+				dst = appendDomainNameByte(dst, b)
+			}
+			i += n
+		}
+	}
+	return string(dst)
+}
+
+func sprintTxtOctet(s string) string {
+	src := []byte(s)
+	dst := make([]byte, 0, len(src))
+	dst = append(dst, '"')
+	for i := 0; i < len(src); {
+		if i+1 < len(src) && src[i] == '\\' && src[i+1] == '.' {
+			dst = append(dst, src[i:i+2]...)
+			i += 2
+		} else {
+			b, n := nextByte(src, i)
+			if n == 0 {
+				i++ // dangling back slash
+			} else if b == '.' {
+				dst = append(dst, b)
+			} else {
+				if b < ' ' || b > '~' {
+					dst = appendByte(dst, b)
+				} else {
+					dst = append(dst, b)
+				}
+			}
+			i += n
+		}
+	}
+	dst = append(dst, '"')
+	return string(dst)
+}
+
+func sprintTxt(txt []string) string {
+	var out []byte
+	for i, s := range txt {
+		if i > 0 {
+			out = append(out, ` "`...)
+		} else {
+			out = append(out, '"')
+		}
+		bs := []byte(s)
+		for j := 0; j < len(bs); {
+			b, n := nextByte(bs, j)
+			if n == 0 {
+				break
+			}
+			out = appendTXTStringByte(out, b)
+			j += n
+		}
+		out = append(out, '"')
+	}
+	return string(out)
+}
+
+func appendDomainNameByte(s []byte, b byte) []byte {
+	switch b {
+	case '.', ' ', '\'', '@', ';', '(', ')': // additional chars to escape
+		return append(s, '\\', b)
+	}
+	return appendTXTStringByte(s, b)
+}
+
+func appendTXTStringByte(s []byte, b byte) []byte {
+	switch b {
+	case '"', '\\':
+		return append(s, '\\', b)
+	}
+	if b < ' ' || b > '~' {
+		return appendByte(s, b)
+	}
+	return append(s, b)
+}
+
+func appendByte(s []byte, b byte) []byte {
+	var buf [3]byte
+	bufs := strconv.AppendInt(buf[:0], int64(b), 10)
+	s = append(s, '\\')
+	for i := 0; i < 3-len(bufs); i++ {
+		s = append(s, '0')
+	}
+	for _, r := range bufs {
+		s = append(s, r)
+	}
+	return s
+}
+
+func nextByte(b []byte, offset int) (byte, int) {
+	if offset >= len(b) {
+		return 0, 0
+	}
+	if b[offset] != '\\' {
+		// not an escape sequence
+		return b[offset], 1
+	}
+	switch len(b) - offset {
+	case 1: // dangling escape
+		return 0, 0
+	case 2, 3: // too short to be \ddd
+	default: // maybe \ddd
+		if isDigit(b[offset+1]) && isDigit(b[offset+2]) && isDigit(b[offset+3]) {
+			return dddToByte(b[offset+1:]), 4
+		}
+	}
+	// not \ddd, just an RFC 1035 "quoted" character
+	return b[offset+1], 2
+}
+
+// SPF RR. See RFC 4408, Section 3.1.1.
+type SPF struct {
+	Hdr RR_Header
+	Txt []string `dns:"txt"`
+}
+
+func (rr *SPF) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) }
+
+// AVC RR. See https://www.iana.org/assignments/dns-parameters/AVC/avc-completed-template.
+type AVC struct {
+	Hdr RR_Header
+	Txt []string `dns:"txt"`
+}
+
+func (rr *AVC) String() string { return rr.Hdr.String() + sprintTxt(rr.Txt) }
+
+// SRV RR. See RFC 2782.
+type SRV struct {
+	Hdr      RR_Header
+	Priority uint16
+	Weight   uint16
+	Port     uint16
+	Target   string `dns:"domain-name"`
+}
+
+func (rr *SRV) String() string {
+	return rr.Hdr.String() +
+		strconv.Itoa(int(rr.Priority)) + " " +
+		strconv.Itoa(int(rr.Weight)) + " " +
+		strconv.Itoa(int(rr.Port)) + " " + sprintName(rr.Target)
+}
+
+// NAPTR RR. See RFC 2915.
+type NAPTR struct {
+	Hdr         RR_Header
+	Order       uint16
+	Preference  uint16
+	Flags       string
+	Service     string
+	Regexp      string
+	Replacement string `dns:"domain-name"`
+}
+
+func (rr *NAPTR) String() string {
+	return rr.Hdr.String() +
+		strconv.Itoa(int(rr.Order)) + " " +
+		strconv.Itoa(int(rr.Preference)) + " " +
+		"\"" + rr.Flags + "\" " +
+		"\"" + rr.Service + "\" " +
+		"\"" + rr.Regexp + "\" " +
+		rr.Replacement
+}
+
+// CERT RR. See RFC 4398.
+type CERT struct {
+	Hdr         RR_Header
+	Type        uint16
+	KeyTag      uint16
+	Algorithm   uint8
+	Certificate string `dns:"base64"`
+}
+
+func (rr *CERT) String() string {
+	var (
+		ok                  bool
+		certtype, algorithm string
+	)
+	if certtype, ok = CertTypeToString[rr.Type]; !ok {
+		certtype = strconv.Itoa(int(rr.Type))
+	}
+	if algorithm, ok = AlgorithmToString[rr.Algorithm]; !ok {
+		algorithm = strconv.Itoa(int(rr.Algorithm))
+	}
+	return rr.Hdr.String() + certtype +
+		" " + strconv.Itoa(int(rr.KeyTag)) +
+		" " + algorithm +
+		" " + rr.Certificate
+}
+
+// DNAME RR. See RFC 2672.
+type DNAME struct {
+	Hdr    RR_Header
+	Target string `dns:"domain-name"`
+}
+
+func (rr *DNAME) String() string {
+	return rr.Hdr.String() + sprintName(rr.Target)
+}
+
+// A RR. See RFC 1035.
+type A struct {
+	Hdr RR_Header
+	A   net.IP `dns:"a"`
+}
+
+func (rr *A) String() string {
+	if rr.A == nil {
+		return rr.Hdr.String()
+	}
+	return rr.Hdr.String() + rr.A.String()
+}
+
+// AAAA RR. See RFC 3596.
+type AAAA struct {
+	Hdr  RR_Header
+	AAAA net.IP `dns:"aaaa"`
+}
+
+func (rr *AAAA) String() string {
+	if rr.AAAA == nil {
+		return rr.Hdr.String()
+	}
+	return rr.Hdr.String() + rr.AAAA.String()
+}
+
+// PX RR. See RFC 2163.
+type PX struct {
+	Hdr        RR_Header
+	Preference uint16
+	Map822     string `dns:"domain-name"`
+	Mapx400    string `dns:"domain-name"`
+}
+
+func (rr *PX) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Map822) + " " + sprintName(rr.Mapx400)
+}
+
+// GPOS RR. See RFC 1712.
+type GPOS struct {
+	Hdr       RR_Header
+	Longitude string
+	Latitude  string
+	Altitude  string
+}
+
+func (rr *GPOS) String() string {
+	return rr.Hdr.String() + rr.Longitude + " " + rr.Latitude + " " + rr.Altitude
+}
+
+// LOC RR. See RFC RFC 1876.
+type LOC struct {
+	Hdr       RR_Header
+	Version   uint8
+	Size      uint8
+	HorizPre  uint8
+	VertPre   uint8
+	Latitude  uint32
+	Longitude uint32
+	Altitude  uint32
+}
+
+// cmToM takes a cm value expressed in RFC1876 SIZE mantissa/exponent
+// format and returns a string in m (two decimals for the cm)
+func cmToM(m, e uint8) string {
+	if e < 2 {
+		if e == 1 {
+			m *= 10
+		}
+
+		return fmt.Sprintf("0.%02d", m)
+	}
+
+	s := fmt.Sprintf("%d", m)
+	for e > 2 {
+		s += "0"
+		e--
+	}
+	return s
+}
+
+func (rr *LOC) String() string {
+	s := rr.Hdr.String()
+
+	lat := rr.Latitude
+	ns := "N"
+	if lat > LOC_EQUATOR {
+		lat = lat - LOC_EQUATOR
+	} else {
+		ns = "S"
+		lat = LOC_EQUATOR - lat
+	}
+	h := lat / LOC_DEGREES
+	lat = lat % LOC_DEGREES
+	m := lat / LOC_HOURS
+	lat = lat % LOC_HOURS
+	s += fmt.Sprintf("%02d %02d %0.3f %s ", h, m, (float64(lat) / 1000), ns)
+
+	lon := rr.Longitude
+	ew := "E"
+	if lon > LOC_PRIMEMERIDIAN {
+		lon = lon - LOC_PRIMEMERIDIAN
+	} else {
+		ew = "W"
+		lon = LOC_PRIMEMERIDIAN - lon
+	}
+	h = lon / LOC_DEGREES
+	lon = lon % LOC_DEGREES
+	m = lon / LOC_HOURS
+	lon = lon % LOC_HOURS
+	s += fmt.Sprintf("%02d %02d %0.3f %s ", h, m, (float64(lon) / 1000), ew)
+
+	var alt = float64(rr.Altitude) / 100
+	alt -= LOC_ALTITUDEBASE
+	if rr.Altitude%100 != 0 {
+		s += fmt.Sprintf("%.2fm ", alt)
+	} else {
+		s += fmt.Sprintf("%.0fm ", alt)
+	}
+
+	s += cmToM((rr.Size&0xf0)>>4, rr.Size&0x0f) + "m "
+	s += cmToM((rr.HorizPre&0xf0)>>4, rr.HorizPre&0x0f) + "m "
+	s += cmToM((rr.VertPre&0xf0)>>4, rr.VertPre&0x0f) + "m"
+
+	return s
+}
+
+// SIG RR. See RFC 2535. The SIG RR is identical to RRSIG and nowadays only used for SIG(0), See RFC 2931.
+type SIG struct {
+	RRSIG
+}
+
+// RRSIG RR. See RFC 4034 and RFC 3755.
+type RRSIG struct {
+	Hdr         RR_Header
+	TypeCovered uint16
+	Algorithm   uint8
+	Labels      uint8
+	OrigTtl     uint32
+	Expiration  uint32
+	Inception   uint32
+	KeyTag      uint16
+	SignerName  string `dns:"domain-name"`
+	Signature   string `dns:"base64"`
+}
+
+func (rr *RRSIG) String() string {
+	s := rr.Hdr.String()
+	s += Type(rr.TypeCovered).String()
+	s += " " + strconv.Itoa(int(rr.Algorithm)) +
+		" " + strconv.Itoa(int(rr.Labels)) +
+		" " + strconv.FormatInt(int64(rr.OrigTtl), 10) +
+		" " + TimeToString(rr.Expiration) +
+		" " + TimeToString(rr.Inception) +
+		" " + strconv.Itoa(int(rr.KeyTag)) +
+		" " + sprintName(rr.SignerName) +
+		" " + rr.Signature
+	return s
+}
+
+// NSEC RR. See RFC 4034 and RFC 3755.
+type NSEC struct {
+	Hdr        RR_Header
+	NextDomain string   `dns:"domain-name"`
+	TypeBitMap []uint16 `dns:"nsec"`
+}
+
+func (rr *NSEC) String() string {
+	s := rr.Hdr.String() + sprintName(rr.NextDomain)
+	for i := 0; i < len(rr.TypeBitMap); i++ {
+		s += " " + Type(rr.TypeBitMap[i]).String()
+	}
+	return s
+}
+
+func (rr *NSEC) len() int {
+	l := rr.Hdr.len() + len(rr.NextDomain) + 1
+	lastwindow := uint32(2 ^ 32 + 1)
+	for _, t := range rr.TypeBitMap {
+		window := t / 256
+		if uint32(window) != lastwindow {
+			l += 1 + 32
+		}
+		lastwindow = uint32(window)
+	}
+	return l
+}
+
+// DLV RR. See RFC 4431.
+type DLV struct{ DS }
+
+// CDS RR. See RFC 7344.
+type CDS struct{ DS }
+
+// DS RR. See RFC 4034 and RFC 3658.
+type DS struct {
+	Hdr        RR_Header
+	KeyTag     uint16
+	Algorithm  uint8
+	DigestType uint8
+	Digest     string `dns:"hex"`
+}
+
+func (rr *DS) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) +
+		" " + strconv.Itoa(int(rr.Algorithm)) +
+		" " + strconv.Itoa(int(rr.DigestType)) +
+		" " + strings.ToUpper(rr.Digest)
+}
+
+// KX RR. See RFC 2230.
+type KX struct {
+	Hdr        RR_Header
+	Preference uint16
+	Exchanger  string `dns:"domain-name"`
+}
+
+func (rr *KX) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) +
+		" " + sprintName(rr.Exchanger)
+}
+
+// TA RR. See http://www.watson.org/~weiler/INI1999-19.pdf.
+type TA struct {
+	Hdr        RR_Header
+	KeyTag     uint16
+	Algorithm  uint8
+	DigestType uint8
+	Digest     string `dns:"hex"`
+}
+
+func (rr *TA) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.KeyTag)) +
+		" " + strconv.Itoa(int(rr.Algorithm)) +
+		" " + strconv.Itoa(int(rr.DigestType)) +
+		" " + strings.ToUpper(rr.Digest)
+}
+
+// TALINK RR. See https://www.iana.org/assignments/dns-parameters/TALINK/talink-completed-template.
+type TALINK struct {
+	Hdr          RR_Header
+	PreviousName string `dns:"domain-name"`
+	NextName     string `dns:"domain-name"`
+}
+
+func (rr *TALINK) String() string {
+	return rr.Hdr.String() +
+		sprintName(rr.PreviousName) + " " + sprintName(rr.NextName)
+}
+
+// SSHFP RR. See RFC RFC 4255.
+type SSHFP struct {
+	Hdr         RR_Header
+	Algorithm   uint8
+	Type        uint8
+	FingerPrint string `dns:"hex"`
+}
+
+func (rr *SSHFP) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Algorithm)) +
+		" " + strconv.Itoa(int(rr.Type)) +
+		" " + strings.ToUpper(rr.FingerPrint)
+}
+
+// KEY RR. See RFC RFC 2535.
+type KEY struct {
+	DNSKEY
+}
+
+// CDNSKEY RR. See RFC 7344.
+type CDNSKEY struct {
+	DNSKEY
+}
+
+// DNSKEY RR. See RFC 4034 and RFC 3755.
+type DNSKEY struct {
+	Hdr       RR_Header
+	Flags     uint16
+	Protocol  uint8
+	Algorithm uint8
+	PublicKey string `dns:"base64"`
+}
+
+func (rr *DNSKEY) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Flags)) +
+		" " + strconv.Itoa(int(rr.Protocol)) +
+		" " + strconv.Itoa(int(rr.Algorithm)) +
+		" " + rr.PublicKey
+}
+
+// RKEY RR. See https://www.iana.org/assignments/dns-parameters/RKEY/rkey-completed-template.
+type RKEY struct {
+	Hdr       RR_Header
+	Flags     uint16
+	Protocol  uint8
+	Algorithm uint8
+	PublicKey string `dns:"base64"`
+}
+
+func (rr *RKEY) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Flags)) +
+		" " + strconv.Itoa(int(rr.Protocol)) +
+		" " + strconv.Itoa(int(rr.Algorithm)) +
+		" " + rr.PublicKey
+}
+
+// NSAPPTR RR. See RFC 1348.
+type NSAPPTR struct {
+	Hdr RR_Header
+	Ptr string `dns:"domain-name"`
+}
+
+func (rr *NSAPPTR) String() string { return rr.Hdr.String() + sprintName(rr.Ptr) }
+
+// NSEC3 RR. See RFC 5155.
+type NSEC3 struct {
+	Hdr        RR_Header
+	Hash       uint8
+	Flags      uint8
+	Iterations uint16
+	SaltLength uint8
+	Salt       string `dns:"size-hex:SaltLength"`
+	HashLength uint8
+	NextDomain string   `dns:"size-base32:HashLength"`
+	TypeBitMap []uint16 `dns:"nsec"`
+}
+
+func (rr *NSEC3) String() string {
+	s := rr.Hdr.String()
+	s += strconv.Itoa(int(rr.Hash)) +
+		" " + strconv.Itoa(int(rr.Flags)) +
+		" " + strconv.Itoa(int(rr.Iterations)) +
+		" " + saltToString(rr.Salt) +
+		" " + rr.NextDomain
+	for i := 0; i < len(rr.TypeBitMap); i++ {
+		s += " " + Type(rr.TypeBitMap[i]).String()
+	}
+	return s
+}
+
+func (rr *NSEC3) len() int {
+	l := rr.Hdr.len() + 6 + len(rr.Salt)/2 + 1 + len(rr.NextDomain) + 1
+	lastwindow := uint32(2 ^ 32 + 1)
+	for _, t := range rr.TypeBitMap {
+		window := t / 256
+		if uint32(window) != lastwindow {
+			l += 1 + 32
+		}
+		lastwindow = uint32(window)
+	}
+	return l
+}
+
+// NSEC3PARAM RR. See RFC 5155.
+type NSEC3PARAM struct {
+	Hdr        RR_Header
+	Hash       uint8
+	Flags      uint8
+	Iterations uint16
+	SaltLength uint8
+	Salt       string `dns:"size-hex:SaltLength"`
+}
+
+func (rr *NSEC3PARAM) String() string {
+	s := rr.Hdr.String()
+	s += strconv.Itoa(int(rr.Hash)) +
+		" " + strconv.Itoa(int(rr.Flags)) +
+		" " + strconv.Itoa(int(rr.Iterations)) +
+		" " + saltToString(rr.Salt)
+	return s
+}
+
+// TKEY RR. See RFC 2930.
+type TKEY struct {
+	Hdr        RR_Header
+	Algorithm  string `dns:"domain-name"`
+	Inception  uint32
+	Expiration uint32
+	Mode       uint16
+	Error      uint16
+	KeySize    uint16
+	Key        string `dns:"size-hex:KeySize"`
+	OtherLen   uint16
+	OtherData  string `dns:"size-hex:OtherLen"`
+}
+
+// TKEY has no official presentation format, but this will suffice.
+func (rr *TKEY) String() string {
+	s := "\n;; TKEY PSEUDOSECTION:\n"
+	s += rr.Hdr.String() + " " + rr.Algorithm + " " +
+		strconv.Itoa(int(rr.KeySize)) + " " + rr.Key + " " +
+		strconv.Itoa(int(rr.OtherLen)) + " " + rr.OtherData
+	return s
+}
+
+// RFC3597 represents an unknown/generic RR. See RFC 3597.
+type RFC3597 struct {
+	Hdr   RR_Header
+	Rdata string `dns:"hex"`
+}
+
+func (rr *RFC3597) String() string {
+	// Let's call it a hack
+	s := rfc3597Header(rr.Hdr)
+
+	s += "\\# " + strconv.Itoa(len(rr.Rdata)/2) + " " + rr.Rdata
+	return s
+}
+
+func rfc3597Header(h RR_Header) string {
+	var s string
+
+	s += sprintName(h.Name) + "\t"
+	s += strconv.FormatInt(int64(h.Ttl), 10) + "\t"
+	s += "CLASS" + strconv.Itoa(int(h.Class)) + "\t"
+	s += "TYPE" + strconv.Itoa(int(h.Rrtype)) + "\t"
+	return s
+}
+
+// URI RR. See RFC 7553.
+type URI struct {
+	Hdr      RR_Header
+	Priority uint16
+	Weight   uint16
+	Target   string `dns:"octet"`
+}
+
+func (rr *URI) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Priority)) +
+		" " + strconv.Itoa(int(rr.Weight)) + " " + sprintTxtOctet(rr.Target)
+}
+
+// DHCID RR. See RFC 4701.
+type DHCID struct {
+	Hdr    RR_Header
+	Digest string `dns:"base64"`
+}
+
+func (rr *DHCID) String() string { return rr.Hdr.String() + rr.Digest }
+
+// TLSA RR. See RFC 6698.
+type TLSA struct {
+	Hdr          RR_Header
+	Usage        uint8
+	Selector     uint8
+	MatchingType uint8
+	Certificate  string `dns:"hex"`
+}
+
+func (rr *TLSA) String() string {
+	return rr.Hdr.String() +
+		strconv.Itoa(int(rr.Usage)) +
+		" " + strconv.Itoa(int(rr.Selector)) +
+		" " + strconv.Itoa(int(rr.MatchingType)) +
+		" " + rr.Certificate
+}
+
+// SMIMEA RR. See RFC 8162.
+type SMIMEA struct {
+	Hdr          RR_Header
+	Usage        uint8
+	Selector     uint8
+	MatchingType uint8
+	Certificate  string `dns:"hex"`
+}
+
+func (rr *SMIMEA) String() string {
+	s := rr.Hdr.String() +
+		strconv.Itoa(int(rr.Usage)) +
+		" " + strconv.Itoa(int(rr.Selector)) +
+		" " + strconv.Itoa(int(rr.MatchingType))
+
+	// Every Nth char needs a space on this output. If we output
+	// this as one giant line, we can't read it can in because in some cases
+	// the cert length overflows scan.maxTok (2048).
+	sx := splitN(rr.Certificate, 1024) // conservative value here
+	s += " " + strings.Join(sx, " ")
+	return s
+}
+
+// HIP RR. See RFC 8005.
+type HIP struct {
+	Hdr                RR_Header
+	HitLength          uint8
+	PublicKeyAlgorithm uint8
+	PublicKeyLength    uint16
+	Hit                string   `dns:"size-hex:HitLength"`
+	PublicKey          string   `dns:"size-base64:PublicKeyLength"`
+	RendezvousServers  []string `dns:"domain-name"`
+}
+
+func (rr *HIP) String() string {
+	s := rr.Hdr.String() +
+		strconv.Itoa(int(rr.PublicKeyAlgorithm)) +
+		" " + rr.Hit +
+		" " + rr.PublicKey
+	for _, d := range rr.RendezvousServers {
+		s += " " + sprintName(d)
+	}
+	return s
+}
+
+// NINFO RR. See https://www.iana.org/assignments/dns-parameters/NINFO/ninfo-completed-template.
+type NINFO struct {
+	Hdr    RR_Header
+	ZSData []string `dns:"txt"`
+}
+
+func (rr *NINFO) String() string { return rr.Hdr.String() + sprintTxt(rr.ZSData) }
+
+// NID RR. See RFC RFC 6742.
+type NID struct {
+	Hdr        RR_Header
+	Preference uint16
+	NodeID     uint64
+}
+
+func (rr *NID) String() string {
+	s := rr.Hdr.String() + strconv.Itoa(int(rr.Preference))
+	node := fmt.Sprintf("%0.16x", rr.NodeID)
+	s += " " + node[0:4] + ":" + node[4:8] + ":" + node[8:12] + ":" + node[12:16]
+	return s
+}
+
+// L32 RR, See RFC 6742.
+type L32 struct {
+	Hdr        RR_Header
+	Preference uint16
+	Locator32  net.IP `dns:"a"`
+}
+
+func (rr *L32) String() string {
+	if rr.Locator32 == nil {
+		return rr.Hdr.String() + strconv.Itoa(int(rr.Preference))
+	}
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) +
+		" " + rr.Locator32.String()
+}
+
+// L64 RR, See RFC 6742.
+type L64 struct {
+	Hdr        RR_Header
+	Preference uint16
+	Locator64  uint64
+}
+
+func (rr *L64) String() string {
+	s := rr.Hdr.String() + strconv.Itoa(int(rr.Preference))
+	node := fmt.Sprintf("%0.16X", rr.Locator64)
+	s += " " + node[0:4] + ":" + node[4:8] + ":" + node[8:12] + ":" + node[12:16]
+	return s
+}
+
+// LP RR. See RFC 6742.
+type LP struct {
+	Hdr        RR_Header
+	Preference uint16
+	Fqdn       string `dns:"domain-name"`
+}
+
+func (rr *LP) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Preference)) + " " + sprintName(rr.Fqdn)
+}
+
+// EUI48 RR. See RFC 7043.
+type EUI48 struct {
+	Hdr     RR_Header
+	Address uint64 `dns:"uint48"`
+}
+
+func (rr *EUI48) String() string { return rr.Hdr.String() + euiToString(rr.Address, 48) }
+
+// EUI64 RR. See RFC 7043.
+type EUI64 struct {
+	Hdr     RR_Header
+	Address uint64
+}
+
+func (rr *EUI64) String() string { return rr.Hdr.String() + euiToString(rr.Address, 64) }
+
+// CAA RR. See RFC 6844.
+type CAA struct {
+	Hdr   RR_Header
+	Flag  uint8
+	Tag   string
+	Value string `dns:"octet"`
+}
+
+func (rr *CAA) String() string {
+	return rr.Hdr.String() + strconv.Itoa(int(rr.Flag)) + " " + rr.Tag + " " + sprintTxtOctet(rr.Value)
+}
+
+// UID RR. Deprecated, IANA-Reserved.
+type UID struct {
+	Hdr RR_Header
+	Uid uint32
+}
+
+func (rr *UID) String() string { return rr.Hdr.String() + strconv.FormatInt(int64(rr.Uid), 10) }
+
+// GID RR. Deprecated, IANA-Reserved.
+type GID struct {
+	Hdr RR_Header
+	Gid uint32
+}
+
+func (rr *GID) String() string { return rr.Hdr.String() + strconv.FormatInt(int64(rr.Gid), 10) }
+
+// UINFO RR. Deprecated, IANA-Reserved.
+type UINFO struct {
+	Hdr   RR_Header
+	Uinfo string
+}
+
+func (rr *UINFO) String() string { return rr.Hdr.String() + sprintTxt([]string{rr.Uinfo}) }
+
+// EID RR. See http://ana-3.lcs.mit.edu/~jnc/nimrod/dns.txt.
+type EID struct {
+	Hdr      RR_Header
+	Endpoint string `dns:"hex"`
+}
+
+func (rr *EID) String() string { return rr.Hdr.String() + strings.ToUpper(rr.Endpoint) }
+
+// NIMLOC RR. See http://ana-3.lcs.mit.edu/~jnc/nimrod/dns.txt.
+type NIMLOC struct {
+	Hdr     RR_Header
+	Locator string `dns:"hex"`
+}
+
+func (rr *NIMLOC) String() string { return rr.Hdr.String() + strings.ToUpper(rr.Locator) }
+
+// OPENPGPKEY RR. See RFC 7929.
+type OPENPGPKEY struct {
+	Hdr       RR_Header
+	PublicKey string `dns:"base64"`
+}
+
+func (rr *OPENPGPKEY) String() string { return rr.Hdr.String() + rr.PublicKey }
+
+// CSYNC RR. See RFC 7477.
+type CSYNC struct {
+	Hdr        RR_Header
+	Serial     uint32
+	Flags      uint16
+	TypeBitMap []uint16 `dns:"nsec"`
+}
+
+func (rr *CSYNC) String() string {
+	s := rr.Hdr.String() + strconv.FormatInt(int64(rr.Serial), 10) + " " + strconv.Itoa(int(rr.Flags))
+
+	for i := 0; i < len(rr.TypeBitMap); i++ {
+		s += " " + Type(rr.TypeBitMap[i]).String()
+	}
+	return s
+}
+
+func (rr *CSYNC) len() int {
+	l := rr.Hdr.len() + 4 + 2
+	lastwindow := uint32(2 ^ 32 + 1)
+	for _, t := range rr.TypeBitMap {
+		window := t / 256
+		if uint32(window) != lastwindow {
+			l += 1 + 32
+		}
+		lastwindow = uint32(window)
+	}
+	return l
+}
+
+// TimeToString translates the RRSIG's incep. and expir. times to the
+// string representation used when printing the record.
+// It takes serial arithmetic (RFC 1982) into account.
+func TimeToString(t uint32) string {
+	mod := ((int64(t) - time.Now().Unix()) / year68) - 1
+	if mod < 0 {
+		mod = 0
+	}
+	ti := time.Unix(int64(t)-(mod*year68), 0).UTC()
+	return ti.Format("20060102150405")
+}
+
+// StringToTime translates the RRSIG's incep. and expir. times from
+// string values like "20110403154150" to an 32 bit integer.
+// It takes serial arithmetic (RFC 1982) into account.
+func StringToTime(s string) (uint32, error) {
+	t, err := time.Parse("20060102150405", s)
+	if err != nil {
+		return 0, err
+	}
+	mod := (t.Unix() / year68) - 1
+	if mod < 0 {
+		mod = 0
+	}
+	return uint32(t.Unix() - (mod * year68)), nil
+}
+
+// saltToString converts a NSECX salt to uppercase and returns "-" when it is empty.
+func saltToString(s string) string {
+	if len(s) == 0 {
+		return "-"
+	}
+	return strings.ToUpper(s)
+}
+
+func euiToString(eui uint64, bits int) (hex string) {
+	switch bits {
+	case 64:
+		hex = fmt.Sprintf("%16.16x", eui)
+		hex = hex[0:2] + "-" + hex[2:4] + "-" + hex[4:6] + "-" + hex[6:8] +
+			"-" + hex[8:10] + "-" + hex[10:12] + "-" + hex[12:14] + "-" + hex[14:16]
+	case 48:
+		hex = fmt.Sprintf("%12.12x", eui)
+		hex = hex[0:2] + "-" + hex[2:4] + "-" + hex[4:6] + "-" + hex[6:8] +
+			"-" + hex[8:10] + "-" + hex[10:12]
+	}
+	return
+}
+
+// copyIP returns a copy of ip.
+func copyIP(ip net.IP) net.IP {
+	p := make(net.IP, len(ip))
+	copy(p, ip)
+	return p
+}
+
+// SplitN splits a string into N sized string chunks.
+// This might become an exported function once.
+func splitN(s string, n int) []string {
+	if len(s) < n {
+		return []string{s}
+	}
+	sx := []string{}
+	p, i := 0, n
+	for {
+		if i <= len(s) {
+			sx = append(sx, s[p:i])
+		} else {
+			sx = append(sx, s[p:])
+			break
+
+		}
+		p, i = p+n, i+n
+	}
+
+	return sx
+}
diff --git a/vendor/github.com/miekg/dns/types_generate.go b/vendor/github.com/miekg/dns/types_generate.go
new file mode 100644
index 0000000..8703cce
--- /dev/null
+++ b/vendor/github.com/miekg/dns/types_generate.go
@@ -0,0 +1,272 @@
+//+build ignore
+
+// types_generate.go is meant to run with go generate. It will use
+// go/{importer,types} to track down all the RR struct types. Then for each type
+// it will generate conversion tables (TypeToRR and TypeToString) and banal
+// methods (len, Header, copy) based on the struct tags. The generated source is
+// written to ztypes.go, and is meant to be checked into git.
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"go/format"
+	"go/importer"
+	"go/types"
+	"log"
+	"os"
+	"strings"
+	"text/template"
+)
+
+var skipLen = map[string]struct{}{
+	"NSEC":  {},
+	"NSEC3": {},
+	"OPT":   {},
+	"CSYNC": {},
+}
+
+var packageHdr = `
+// Code generated by "go run types_generate.go"; DO NOT EDIT.
+
+package dns
+
+import (
+	"encoding/base64"
+	"net"
+)
+
+`
+
+var TypeToRR = template.Must(template.New("TypeToRR").Parse(`
+// TypeToRR is a map of constructors for each RR type.
+var TypeToRR = map[uint16]func() RR{
+{{range .}}{{if ne . "RFC3597"}}  Type{{.}}:  func() RR { return new({{.}}) },
+{{end}}{{end}}                    }
+
+`))
+
+var typeToString = template.Must(template.New("typeToString").Parse(`
+// TypeToString is a map of strings for each RR type.
+var TypeToString = map[uint16]string{
+{{range .}}{{if ne . "NSAPPTR"}}  Type{{.}}: "{{.}}",
+{{end}}{{end}}                    TypeNSAPPTR:    "NSAP-PTR",
+}
+
+`))
+
+var headerFunc = template.Must(template.New("headerFunc").Parse(`
+{{range .}}  func (rr *{{.}}) Header() *RR_Header { return &rr.Hdr }
+{{end}}
+
+`))
+
+// getTypeStruct will take a type and the package scope, and return the
+// (innermost) struct if the type is considered a RR type (currently defined as
+// those structs beginning with a RR_Header, could be redefined as implementing
+// the RR interface). The bool return value indicates if embedded structs were
+// resolved.
+func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) {
+	st, ok := t.Underlying().(*types.Struct)
+	if !ok {
+		return nil, false
+	}
+	if st.Field(0).Type() == scope.Lookup("RR_Header").Type() {
+		return st, false
+	}
+	if st.Field(0).Anonymous() {
+		st, _ := getTypeStruct(st.Field(0).Type(), scope)
+		return st, true
+	}
+	return nil, false
+}
+
+func main() {
+	// Import and type-check the package
+	pkg, err := importer.Default().Import("github.com/miekg/dns")
+	fatalIfErr(err)
+	scope := pkg.Scope()
+
+	// Collect constants like TypeX
+	var numberedTypes []string
+	for _, name := range scope.Names() {
+		o := scope.Lookup(name)
+		if o == nil || !o.Exported() {
+			continue
+		}
+		b, ok := o.Type().(*types.Basic)
+		if !ok || b.Kind() != types.Uint16 {
+			continue
+		}
+		if !strings.HasPrefix(o.Name(), "Type") {
+			continue
+		}
+		name := strings.TrimPrefix(o.Name(), "Type")
+		if name == "PrivateRR" {
+			continue
+		}
+		numberedTypes = append(numberedTypes, name)
+	}
+
+	// Collect actual types (*X)
+	var namedTypes []string
+	for _, name := range scope.Names() {
+		o := scope.Lookup(name)
+		if o == nil || !o.Exported() {
+			continue
+		}
+		if st, _ := getTypeStruct(o.Type(), scope); st == nil {
+			continue
+		}
+		if name == "PrivateRR" {
+			continue
+		}
+
+		// Check if corresponding TypeX exists
+		if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" {
+			log.Fatalf("Constant Type%s does not exist.", o.Name())
+		}
+
+		namedTypes = append(namedTypes, o.Name())
+	}
+
+	b := &bytes.Buffer{}
+	b.WriteString(packageHdr)
+
+	// Generate TypeToRR
+	fatalIfErr(TypeToRR.Execute(b, namedTypes))
+
+	// Generate typeToString
+	fatalIfErr(typeToString.Execute(b, numberedTypes))
+
+	// Generate headerFunc
+	fatalIfErr(headerFunc.Execute(b, namedTypes))
+
+	// Generate len()
+	fmt.Fprint(b, "// len() functions\n")
+	for _, name := range namedTypes {
+		if _, ok := skipLen[name]; ok {
+			continue
+		}
+		o := scope.Lookup(name)
+		st, isEmbedded := getTypeStruct(o.Type(), scope)
+		if isEmbedded {
+			continue
+		}
+		fmt.Fprintf(b, "func (rr *%s) len() int {\n", name)
+		fmt.Fprintf(b, "l := rr.Hdr.len()\n")
+		for i := 1; i < st.NumFields(); i++ {
+			o := func(s string) { fmt.Fprintf(b, s, st.Field(i).Name()) }
+
+			if _, ok := st.Field(i).Type().(*types.Slice); ok {
+				switch st.Tag(i) {
+				case `dns:"-"`:
+					// ignored
+				case `dns:"cdomain-name"`, `dns:"domain-name"`, `dns:"txt"`:
+					o("for _, x := range rr.%s { l += len(x) + 1 }\n")
+				default:
+					log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+				}
+				continue
+			}
+
+			switch {
+			case st.Tag(i) == `dns:"-"`:
+				// ignored
+			case st.Tag(i) == `dns:"cdomain-name"`, st.Tag(i) == `dns:"domain-name"`:
+				o("l += len(rr.%s) + 1\n")
+			case st.Tag(i) == `dns:"octet"`:
+				o("l += len(rr.%s)\n")
+			case strings.HasPrefix(st.Tag(i), `dns:"size-base64`):
+				fallthrough
+			case st.Tag(i) == `dns:"base64"`:
+				o("l += base64.StdEncoding.DecodedLen(len(rr.%s))\n")
+			case strings.HasPrefix(st.Tag(i), `dns:"size-hex:`): // this has an extra field where the length is stored
+				o("l += len(rr.%s)/2\n")
+			case strings.HasPrefix(st.Tag(i), `dns:"size-hex`):
+				fallthrough
+			case st.Tag(i) == `dns:"hex"`:
+				o("l += len(rr.%s)/2 + 1\n")
+			case st.Tag(i) == `dns:"a"`:
+				o("l += net.IPv4len // %s\n")
+			case st.Tag(i) == `dns:"aaaa"`:
+				o("l += net.IPv6len // %s\n")
+			case st.Tag(i) == `dns:"txt"`:
+				o("for _, t := range rr.%s { l += len(t) + 1 }\n")
+			case st.Tag(i) == `dns:"uint48"`:
+				o("l += 6 // %s\n")
+			case st.Tag(i) == "":
+				switch st.Field(i).Type().(*types.Basic).Kind() {
+				case types.Uint8:
+					o("l++ // %s\n")
+				case types.Uint16:
+					o("l += 2 // %s\n")
+				case types.Uint32:
+					o("l += 4 // %s\n")
+				case types.Uint64:
+					o("l += 8 // %s\n")
+				case types.String:
+					o("l += len(rr.%s) + 1\n")
+				default:
+					log.Fatalln(name, st.Field(i).Name())
+				}
+			default:
+				log.Fatalln(name, st.Field(i).Name(), st.Tag(i))
+			}
+		}
+		fmt.Fprintf(b, "return l }\n")
+	}
+
+	// Generate copy()
+	fmt.Fprint(b, "// copy() functions\n")
+	for _, name := range namedTypes {
+		o := scope.Lookup(name)
+		st, isEmbedded := getTypeStruct(o.Type(), scope)
+		if isEmbedded {
+			continue
+		}
+		fmt.Fprintf(b, "func (rr *%s) copy() RR {\n", name)
+		fields := []string{"*rr.Hdr.copyHeader()"}
+		for i := 1; i < st.NumFields(); i++ {
+			f := st.Field(i).Name()
+			if sl, ok := st.Field(i).Type().(*types.Slice); ok {
+				t := sl.Underlying().String()
+				t = strings.TrimPrefix(t, "[]")
+				if strings.Contains(t, ".") {
+					splits := strings.Split(t, ".")
+					t = splits[len(splits)-1]
+				}
+				fmt.Fprintf(b, "%s := make([]%s, len(rr.%s)); copy(%s, rr.%s)\n",
+					f, t, f, f, f)
+				fields = append(fields, f)
+				continue
+			}
+			if st.Field(i).Type().String() == "net.IP" {
+				fields = append(fields, "copyIP(rr."+f+")")
+				continue
+			}
+			fields = append(fields, "rr."+f)
+		}
+		fmt.Fprintf(b, "return &%s{%s}\n", name, strings.Join(fields, ","))
+		fmt.Fprintf(b, "}\n")
+	}
+
+	// gofmt
+	res, err := format.Source(b.Bytes())
+	if err != nil {
+		b.WriteTo(os.Stderr)
+		log.Fatal(err)
+	}
+
+	// write result
+	f, err := os.Create("ztypes.go")
+	fatalIfErr(err)
+	defer f.Close()
+	f.Write(res)
+}
+
+func fatalIfErr(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/vendor/github.com/miekg/dns/udp.go b/vendor/github.com/miekg/dns/udp.go
new file mode 100644
index 0000000..f3f31a7
--- /dev/null
+++ b/vendor/github.com/miekg/dns/udp.go
@@ -0,0 +1,89 @@
+// +build !windows
+
+package dns
+
+import (
+	"net"
+
+	"golang.org/x/net/ipv4"
+	"golang.org/x/net/ipv6"
+)
+
+// SessionUDP holds the remote address and the associated
+// out-of-band data.
+type SessionUDP struct {
+	raddr   *net.UDPAddr
+	context []byte
+}
+
+// RemoteAddr returns the remote network address.
+func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr }
+
+// ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a
+// net.UDPAddr.
+func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) {
+	oob := make([]byte, 40)
+	n, oobn, _, raddr, err := conn.ReadMsgUDP(b, oob)
+	if err != nil {
+		return n, nil, err
+	}
+	return n, &SessionUDP{raddr, oob[:oobn]}, err
+}
+
+// WriteToSessionUDP acts just like net.UDPConn.WriteTo(), but uses a *SessionUDP instead of a net.Addr.
+func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) {
+	oob := correctSource(session.context)
+	n, _, err := conn.WriteMsgUDP(b, oob, session.raddr)
+	return n, err
+}
+
+func setUDPSocketOptions(conn *net.UDPConn) error {
+	// Try setting the flags for both families and ignore the errors unless they
+	// both error.
+	err6 := ipv6.NewPacketConn(conn).SetControlMessage(ipv6.FlagDst|ipv6.FlagInterface, true)
+	err4 := ipv4.NewPacketConn(conn).SetControlMessage(ipv4.FlagDst|ipv4.FlagInterface, true)
+	if err6 != nil && err4 != nil {
+		return err4
+	}
+	return nil
+}
+
+// parseDstFromOOB takes oob data and returns the destination IP.
+func parseDstFromOOB(oob []byte) net.IP {
+	// Start with IPv6 and then fallback to IPv4
+	// TODO(fastest963): Figure out a way to prefer one or the other. Looking at
+	// the lvl of the header for a 0 or 41 isn't cross-platform.
+	var dst net.IP
+	cm6 := new(ipv6.ControlMessage)
+	if cm6.Parse(oob) == nil {
+		dst = cm6.Dst
+	}
+	if dst == nil {
+		cm4 := new(ipv4.ControlMessage)
+		if cm4.Parse(oob) == nil {
+			dst = cm4.Dst
+		}
+	}
+	return dst
+}
+
+// correctSource takes oob data and returns new oob data with the Src equal to the Dst
+func correctSource(oob []byte) []byte {
+	dst := parseDstFromOOB(oob)
+	if dst == nil {
+		return nil
+	}
+	// If the dst is definitely an IPv6, then use ipv6's ControlMessage to
+	// respond otherwise use ipv4's because ipv6's marshal ignores ipv4
+	// addresses.
+	if dst.To4() == nil {
+		cm := new(ipv6.ControlMessage)
+		cm.Src = dst
+		oob = cm.Marshal()
+	} else {
+		cm := new(ipv4.ControlMessage)
+		cm.Src = dst
+		oob = cm.Marshal()
+	}
+	return oob
+}
diff --git a/vendor/github.com/miekg/dns/udp_windows.go b/vendor/github.com/miekg/dns/udp_windows.go
new file mode 100644
index 0000000..6778c3c
--- /dev/null
+++ b/vendor/github.com/miekg/dns/udp_windows.go
@@ -0,0 +1,37 @@
+// +build windows
+
+package dns
+
+import "net"
+
+// SessionUDP holds the remote address
+type SessionUDP struct {
+	raddr *net.UDPAddr
+}
+
+// RemoteAddr returns the remote network address.
+func (s *SessionUDP) RemoteAddr() net.Addr { return s.raddr }
+
+// ReadFromSessionUDP acts just like net.UDPConn.ReadFrom(), but returns a session object instead of a
+// net.UDPAddr.
+// TODO(fastest963): Once go1.10 is released, use ReadMsgUDP.
+func ReadFromSessionUDP(conn *net.UDPConn, b []byte) (int, *SessionUDP, error) {
+	n, raddr, err := conn.ReadFrom(b)
+	if err != nil {
+		return n, nil, err
+	}
+	session := &SessionUDP{raddr.(*net.UDPAddr)}
+	return n, session, err
+}
+
+// WriteToSessionUDP acts just like net.UDPConn.WriteTo(), but uses a *SessionUDP instead of a net.Addr.
+// TODO(fastest963): Once go1.10 is released, use WriteMsgUDP.
+func WriteToSessionUDP(conn *net.UDPConn, b []byte, session *SessionUDP) (int, error) {
+	n, err := conn.WriteTo(b, session.raddr)
+	return n, err
+}
+
+// TODO(fastest963): Once go1.10 is released and we can use *MsgUDP methods
+// use the standard method in udp.go for these.
+func setUDPSocketOptions(*net.UDPConn) error { return nil }
+func parseDstFromOOB([]byte, net.IP) net.IP  { return nil }
diff --git a/vendor/github.com/miekg/dns/update.go b/vendor/github.com/miekg/dns/update.go
new file mode 100644
index 0000000..e90c5c9
--- /dev/null
+++ b/vendor/github.com/miekg/dns/update.go
@@ -0,0 +1,106 @@
+package dns
+
+// NameUsed sets the RRs in the prereq section to
+// "Name is in use" RRs. RFC 2136 section 2.4.4.
+func (u *Msg) NameUsed(rr []RR) {
+	if u.Answer == nil {
+		u.Answer = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}})
+	}
+}
+
+// NameNotUsed sets the RRs in the prereq section to
+// "Name is in not use" RRs. RFC 2136 section 2.4.5.
+func (u *Msg) NameNotUsed(rr []RR) {
+	if u.Answer == nil {
+		u.Answer = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassNONE}})
+	}
+}
+
+// Used sets the RRs in the prereq section to
+// "RRset exists (value dependent -- with rdata)" RRs. RFC 2136 section 2.4.2.
+func (u *Msg) Used(rr []RR) {
+	if len(u.Question) == 0 {
+		panic("dns: empty question section")
+	}
+	if u.Answer == nil {
+		u.Answer = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		r.Header().Class = u.Question[0].Qclass
+		u.Answer = append(u.Answer, r)
+	}
+}
+
+// RRsetUsed sets the RRs in the prereq section to
+// "RRset exists (value independent -- no rdata)" RRs. RFC 2136 section 2.4.1.
+func (u *Msg) RRsetUsed(rr []RR) {
+	if u.Answer == nil {
+		u.Answer = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: r.Header().Rrtype, Class: ClassANY}})
+	}
+}
+
+// RRsetNotUsed sets the RRs in the prereq section to
+// "RRset does not exist" RRs. RFC 2136 section 2.4.3.
+func (u *Msg) RRsetNotUsed(rr []RR) {
+	if u.Answer == nil {
+		u.Answer = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: r.Header().Rrtype, Class: ClassNONE}})
+	}
+}
+
+// Insert creates a dynamic update packet that adds an complete RRset, see RFC 2136 section 2.5.1.
+func (u *Msg) Insert(rr []RR) {
+	if len(u.Question) == 0 {
+		panic("dns: empty question section")
+	}
+	if u.Ns == nil {
+		u.Ns = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		r.Header().Class = u.Question[0].Qclass
+		u.Ns = append(u.Ns, r)
+	}
+}
+
+// RemoveRRset creates a dynamic update packet that deletes an RRset, see RFC 2136 section 2.5.2.
+func (u *Msg) RemoveRRset(rr []RR) {
+	if u.Ns == nil {
+		u.Ns = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: r.Header().Rrtype, Class: ClassANY}})
+	}
+}
+
+// RemoveName creates a dynamic update packet that deletes all RRsets of a name, see RFC 2136 section 2.5.3
+func (u *Msg) RemoveName(rr []RR) {
+	if u.Ns == nil {
+		u.Ns = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}})
+	}
+}
+
+// Remove creates a dynamic update packet deletes RR from a RRSset, see RFC 2136 section 2.5.4
+func (u *Msg) Remove(rr []RR) {
+	if u.Ns == nil {
+		u.Ns = make([]RR, 0, len(rr))
+	}
+	for _, r := range rr {
+		r.Header().Class = ClassNONE
+		r.Header().Ttl = 0
+		u.Ns = append(u.Ns, r)
+	}
+}
diff --git a/vendor/github.com/miekg/dns/version.go b/vendor/github.com/miekg/dns/version.go
new file mode 100644
index 0000000..e41d2b3
--- /dev/null
+++ b/vendor/github.com/miekg/dns/version.go
@@ -0,0 +1,15 @@
+package dns
+
+import "fmt"
+
+// Version is current version of this library.
+var Version = V{1, 0, 4}
+
+// V holds the version of this library.
+type V struct {
+	Major, Minor, Patch int
+}
+
+func (v V) String() string {
+	return fmt.Sprintf("%d.%d.%d", v.Major, v.Minor, v.Patch)
+}
diff --git a/vendor/github.com/miekg/dns/xfr.go b/vendor/github.com/miekg/dns/xfr.go
new file mode 100644
index 0000000..5d0ff5c
--- /dev/null
+++ b/vendor/github.com/miekg/dns/xfr.go
@@ -0,0 +1,260 @@
+package dns
+
+import (
+	"fmt"
+	"time"
+)
+
+// Envelope is used when doing a zone transfer with a remote server.
+type Envelope struct {
+	RR    []RR  // The set of RRs in the answer section of the xfr reply message.
+	Error error // If something went wrong, this contains the error.
+}
+
+// A Transfer defines parameters that are used during a zone transfer.
+type Transfer struct {
+	*Conn
+	DialTimeout    time.Duration     // net.DialTimeout, defaults to 2 seconds
+	ReadTimeout    time.Duration     // net.Conn.SetReadTimeout value for connections, defaults to 2 seconds
+	WriteTimeout   time.Duration     // net.Conn.SetWriteTimeout value for connections, defaults to 2 seconds
+	TsigSecret     map[string]string // Secret(s) for Tsig map[<zonename>]<base64 secret>, zonename must be in canonical form (lowercase, fqdn, see RFC 4034 Section 6.2)
+	tsigTimersOnly bool
+}
+
+// Think we need to away to stop the transfer
+
+// In performs an incoming transfer with the server in a.
+// If you would like to set the source IP, or some other attribute
+// of a Dialer for a Transfer, you can do so by specifying the attributes
+// in the Transfer.Conn:
+//
+//	d := net.Dialer{LocalAddr: transfer_source}
+//	con, err := d.Dial("tcp", master)
+//	dnscon := &dns.Conn{Conn:con}
+//	transfer = &dns.Transfer{Conn: dnscon}
+//	channel, err := transfer.In(message, master)
+//
+func (t *Transfer) In(q *Msg, a string) (env chan *Envelope, err error) {
+	timeout := dnsTimeout
+	if t.DialTimeout != 0 {
+		timeout = t.DialTimeout
+	}
+	if t.Conn == nil {
+		t.Conn, err = DialTimeout("tcp", a, timeout)
+		if err != nil {
+			return nil, err
+		}
+	}
+	if err := t.WriteMsg(q); err != nil {
+		return nil, err
+	}
+	env = make(chan *Envelope)
+	go func() {
+		if q.Question[0].Qtype == TypeAXFR {
+			go t.inAxfr(q, env)
+			return
+		}
+		if q.Question[0].Qtype == TypeIXFR {
+			go t.inIxfr(q, env)
+			return
+		}
+	}()
+	return env, nil
+}
+
+func (t *Transfer) inAxfr(q *Msg, c chan *Envelope) {
+	first := true
+	defer t.Close()
+	defer close(c)
+	timeout := dnsTimeout
+	if t.ReadTimeout != 0 {
+		timeout = t.ReadTimeout
+	}
+	for {
+		t.Conn.SetReadDeadline(time.Now().Add(timeout))
+		in, err := t.ReadMsg()
+		if err != nil {
+			c <- &Envelope{nil, err}
+			return
+		}
+		if q.Id != in.Id {
+			c <- &Envelope{in.Answer, ErrId}
+			return
+		}
+		if first {
+			if in.Rcode != RcodeSuccess {
+				c <- &Envelope{in.Answer, &Error{err: fmt.Sprintf(errXFR, in.Rcode)}}
+				return
+			}
+			if !isSOAFirst(in) {
+				c <- &Envelope{in.Answer, ErrSoa}
+				return
+			}
+			first = !first
+			// only one answer that is SOA, receive more
+			if len(in.Answer) == 1 {
+				t.tsigTimersOnly = true
+				c <- &Envelope{in.Answer, nil}
+				continue
+			}
+		}
+
+		if !first {
+			t.tsigTimersOnly = true // Subsequent envelopes use this.
+			if isSOALast(in) {
+				c <- &Envelope{in.Answer, nil}
+				return
+			}
+			c <- &Envelope{in.Answer, nil}
+		}
+	}
+}
+
+func (t *Transfer) inIxfr(q *Msg, c chan *Envelope) {
+	serial := uint32(0) // The first serial seen is the current server serial
+	axfr := true
+	n := 0
+	qser := q.Ns[0].(*SOA).Serial
+	defer t.Close()
+	defer close(c)
+	timeout := dnsTimeout
+	if t.ReadTimeout != 0 {
+		timeout = t.ReadTimeout
+	}
+	for {
+		t.SetReadDeadline(time.Now().Add(timeout))
+		in, err := t.ReadMsg()
+		if err != nil {
+			c <- &Envelope{nil, err}
+			return
+		}
+		if q.Id != in.Id {
+			c <- &Envelope{in.Answer, ErrId}
+			return
+		}
+		if in.Rcode != RcodeSuccess {
+			c <- &Envelope{in.Answer, &Error{err: fmt.Sprintf(errXFR, in.Rcode)}}
+			return
+		}
+		if n == 0 {
+			// Check if the returned answer is ok
+			if !isSOAFirst(in) {
+				c <- &Envelope{in.Answer, ErrSoa}
+				return
+			}
+			// This serial is important
+			serial = in.Answer[0].(*SOA).Serial
+			// Check if there are no changes in zone
+			if qser >= serial {
+				c <- &Envelope{in.Answer, nil}
+				return
+			}
+		}
+		// Now we need to check each message for SOA records, to see what we need to do
+		t.tsigTimersOnly = true
+		for _, rr := range in.Answer {
+			if v, ok := rr.(*SOA); ok {
+				if v.Serial == serial {
+					n++
+					// quit if it's a full axfr or the the servers' SOA is repeated the third time
+					if axfr && n == 2 || n == 3 {
+						c <- &Envelope{in.Answer, nil}
+						return
+					}
+				} else if axfr {
+					// it's an ixfr
+					axfr = false
+				}
+			}
+		}
+		c <- &Envelope{in.Answer, nil}
+	}
+}
+
+// Out performs an outgoing transfer with the client connecting in w.
+// Basic use pattern:
+//
+//	ch := make(chan *dns.Envelope)
+//	tr := new(dns.Transfer)
+//	go tr.Out(w, r, ch)
+//	ch <- &dns.Envelope{RR: []dns.RR{soa, rr1, rr2, rr3, soa}}
+//	close(ch)
+//	w.Hijack()
+//	// w.Close() // Client closes connection
+//
+// The server is responsible for sending the correct sequence of RRs through the
+// channel ch.
+func (t *Transfer) Out(w ResponseWriter, q *Msg, ch chan *Envelope) error {
+	for x := range ch {
+		r := new(Msg)
+		// Compress?
+		r.SetReply(q)
+		r.Authoritative = true
+		// assume it fits TODO(miek): fix
+		r.Answer = append(r.Answer, x.RR...)
+		if err := w.WriteMsg(r); err != nil {
+			return err
+		}
+	}
+	w.TsigTimersOnly(true)
+	return nil
+}
+
+// ReadMsg reads a message from the transfer connection t.
+func (t *Transfer) ReadMsg() (*Msg, error) {
+	m := new(Msg)
+	p := make([]byte, MaxMsgSize)
+	n, err := t.Read(p)
+	if err != nil && n == 0 {
+		return nil, err
+	}
+	p = p[:n]
+	if err := m.Unpack(p); err != nil {
+		return nil, err
+	}
+	if ts := m.IsTsig(); ts != nil && t.TsigSecret != nil {
+		if _, ok := t.TsigSecret[ts.Hdr.Name]; !ok {
+			return m, ErrSecret
+		}
+		// Need to work on the original message p, as that was used to calculate the tsig.
+		err = TsigVerify(p, t.TsigSecret[ts.Hdr.Name], t.tsigRequestMAC, t.tsigTimersOnly)
+		t.tsigRequestMAC = ts.MAC
+	}
+	return m, err
+}
+
+// WriteMsg writes a message through the transfer connection t.
+func (t *Transfer) WriteMsg(m *Msg) (err error) {
+	var out []byte
+	if ts := m.IsTsig(); ts != nil && t.TsigSecret != nil {
+		if _, ok := t.TsigSecret[ts.Hdr.Name]; !ok {
+			return ErrSecret
+		}
+		out, t.tsigRequestMAC, err = TsigGenerate(m, t.TsigSecret[ts.Hdr.Name], t.tsigRequestMAC, t.tsigTimersOnly)
+	} else {
+		out, err = m.Pack()
+	}
+	if err != nil {
+		return err
+	}
+	if _, err = t.Write(out); err != nil {
+		return err
+	}
+	return nil
+}
+
+func isSOAFirst(in *Msg) bool {
+	if len(in.Answer) > 0 {
+		return in.Answer[0].Header().Rrtype == TypeSOA
+	}
+	return false
+}
+
+func isSOALast(in *Msg) bool {
+	if len(in.Answer) > 0 {
+		return in.Answer[len(in.Answer)-1].Header().Rrtype == TypeSOA
+	}
+	return false
+}
+
+const errXFR = "bad xfr rcode: %d"
diff --git a/vendor/github.com/miekg/dns/zcompress.go b/vendor/github.com/miekg/dns/zcompress.go
new file mode 100644
index 0000000..c250320
--- /dev/null
+++ b/vendor/github.com/miekg/dns/zcompress.go
@@ -0,0 +1,118 @@
+// Code generated by "go run compress_generate.go"; DO NOT EDIT.
+
+package dns
+
+func compressionLenHelperType(c map[string]int, r RR) {
+	switch x := r.(type) {
+	case *AFSDB:
+		compressionLenHelper(c, x.Hostname)
+	case *CNAME:
+		compressionLenHelper(c, x.Target)
+	case *DNAME:
+		compressionLenHelper(c, x.Target)
+	case *HIP:
+		for i := range x.RendezvousServers {
+			compressionLenHelper(c, x.RendezvousServers[i])
+		}
+	case *KX:
+		compressionLenHelper(c, x.Exchanger)
+	case *LP:
+		compressionLenHelper(c, x.Fqdn)
+	case *MB:
+		compressionLenHelper(c, x.Mb)
+	case *MD:
+		compressionLenHelper(c, x.Md)
+	case *MF:
+		compressionLenHelper(c, x.Mf)
+	case *MG:
+		compressionLenHelper(c, x.Mg)
+	case *MINFO:
+		compressionLenHelper(c, x.Rmail)
+		compressionLenHelper(c, x.Email)
+	case *MR:
+		compressionLenHelper(c, x.Mr)
+	case *MX:
+		compressionLenHelper(c, x.Mx)
+	case *NAPTR:
+		compressionLenHelper(c, x.Replacement)
+	case *NS:
+		compressionLenHelper(c, x.Ns)
+	case *NSAPPTR:
+		compressionLenHelper(c, x.Ptr)
+	case *NSEC:
+		compressionLenHelper(c, x.NextDomain)
+	case *PTR:
+		compressionLenHelper(c, x.Ptr)
+	case *PX:
+		compressionLenHelper(c, x.Map822)
+		compressionLenHelper(c, x.Mapx400)
+	case *RP:
+		compressionLenHelper(c, x.Mbox)
+		compressionLenHelper(c, x.Txt)
+	case *RRSIG:
+		compressionLenHelper(c, x.SignerName)
+	case *RT:
+		compressionLenHelper(c, x.Host)
+	case *SIG:
+		compressionLenHelper(c, x.SignerName)
+	case *SOA:
+		compressionLenHelper(c, x.Ns)
+		compressionLenHelper(c, x.Mbox)
+	case *SRV:
+		compressionLenHelper(c, x.Target)
+	case *TALINK:
+		compressionLenHelper(c, x.PreviousName)
+		compressionLenHelper(c, x.NextName)
+	case *TKEY:
+		compressionLenHelper(c, x.Algorithm)
+	case *TSIG:
+		compressionLenHelper(c, x.Algorithm)
+	}
+}
+
+func compressionLenSearchType(c map[string]int, r RR) (int, bool) {
+	switch x := r.(type) {
+	case *AFSDB:
+		k1, ok1 := compressionLenSearch(c, x.Hostname)
+		return k1, ok1
+	case *CNAME:
+		k1, ok1 := compressionLenSearch(c, x.Target)
+		return k1, ok1
+	case *MB:
+		k1, ok1 := compressionLenSearch(c, x.Mb)
+		return k1, ok1
+	case *MD:
+		k1, ok1 := compressionLenSearch(c, x.Md)
+		return k1, ok1
+	case *MF:
+		k1, ok1 := compressionLenSearch(c, x.Mf)
+		return k1, ok1
+	case *MG:
+		k1, ok1 := compressionLenSearch(c, x.Mg)
+		return k1, ok1
+	case *MINFO:
+		k1, ok1 := compressionLenSearch(c, x.Rmail)
+		k2, ok2 := compressionLenSearch(c, x.Email)
+		return k1 + k2, ok1 && ok2
+	case *MR:
+		k1, ok1 := compressionLenSearch(c, x.Mr)
+		return k1, ok1
+	case *MX:
+		k1, ok1 := compressionLenSearch(c, x.Mx)
+		return k1, ok1
+	case *NS:
+		k1, ok1 := compressionLenSearch(c, x.Ns)
+		return k1, ok1
+	case *PTR:
+		k1, ok1 := compressionLenSearch(c, x.Ptr)
+		return k1, ok1
+	case *RT:
+		k1, ok1 := compressionLenSearch(c, x.Host)
+		return k1, ok1
+	case *SOA:
+		k1, ok1 := compressionLenSearch(c, x.Ns)
+		k2, ok2 := compressionLenSearch(c, x.Mbox)
+		return k1 + k2, ok1 && ok2
+	}
+	return 0, false
+}
diff --git a/vendor/github.com/miekg/dns/zmsg.go b/vendor/github.com/miekg/dns/zmsg.go
new file mode 100644
index 0000000..0d1f6f4
--- /dev/null
+++ b/vendor/github.com/miekg/dns/zmsg.go
@@ -0,0 +1,3615 @@
+// Code generated by "go run msg_generate.go"; DO NOT EDIT.
+
+package dns
+
+// pack*() functions
+
+func (rr *A) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packDataA(rr.A, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *AAAA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packDataAAAA(rr.AAAA, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *AFSDB) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Subtype, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Hostname, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *ANY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *AVC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringTxt(rr.Txt, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *CAA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Flag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Tag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringOctet(rr.Value, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *CDNSKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Protocol, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *CDS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.DigestType, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Digest, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *CERT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Type, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.Certificate, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *CNAME) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Target, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *CSYNC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint32(rr.Serial, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packDataNsec(rr.TypeBitMap, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *DHCID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringBase64(rr.Digest, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *DLV) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.DigestType, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Digest, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *DNAME) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Target, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *DNSKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Protocol, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *DS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.DigestType, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Digest, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *EID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringHex(rr.Endpoint, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *EUI48) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint48(rr.Address, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *EUI64) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint64(rr.Address, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *GID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint32(rr.Gid, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *GPOS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packString(rr.Longitude, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Latitude, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Altitude, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *HINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packString(rr.Cpu, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Os, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *HIP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.HitLength, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.PublicKeyAlgorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.PublicKeyLength, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Hit, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packDataDomainNames(rr.RendezvousServers, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *KEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Protocol, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *KX) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Exchanger, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *L32) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packDataA(rr.Locator32, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *L64) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint64(rr.Locator64, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *LOC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Version, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Size, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.HorizPre, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.VertPre, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Latitude, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Longitude, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Altitude, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *LP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Fqdn, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MB) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Mb, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MD) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Md, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MF) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Mf, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Mg, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Rmail, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Email, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Mr, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *MX) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Mx, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NAPTR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Order, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Service, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packString(rr.Regexp, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Replacement, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint64(rr.NodeID, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NIMLOC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringHex(rr.Locator, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringTxt(rr.ZSData, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NS) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Ns, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NSAPPTR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Ptr, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NSEC) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.NextDomain, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packDataNsec(rr.TypeBitMap, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NSEC3) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Hash, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Iterations, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.SaltLength, msg, off)
+	if err != nil {
+		return off, err
+	}
+	// Only pack salt if value is not "-", i.e. empty
+	if rr.Salt != "-" {
+		off, err = packStringHex(rr.Salt, msg, off)
+		if err != nil {
+			return off, err
+		}
+	}
+	off, err = packUint8(rr.HashLength, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase32(rr.NextDomain, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packDataNsec(rr.TypeBitMap, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *NSEC3PARAM) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Hash, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Iterations, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.SaltLength, msg, off)
+	if err != nil {
+		return off, err
+	}
+	// Only pack salt if value is not "-", i.e. empty
+	if rr.Salt != "-" {
+		off, err = packStringHex(rr.Salt, msg, off)
+		if err != nil {
+			return off, err
+		}
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *OPENPGPKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringBase64(rr.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *OPT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packDataOpt(rr.Option, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *PTR) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Ptr, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *PX) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Map822, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Mapx400, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *RFC3597) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringHex(rr.Rdata, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *RKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Flags, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Protocol, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.PublicKey, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *RP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Mbox, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Txt, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *RRSIG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.TypeCovered, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Labels, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.OrigTtl, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Expiration, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Inception, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.SignerName, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.Signature, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *RT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Preference, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Host, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *SIG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.TypeCovered, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Labels, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.OrigTtl, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Expiration, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Inception, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.SignerName, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringBase64(rr.Signature, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *SMIMEA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Usage, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Selector, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.MatchingType, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Certificate, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *SOA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Ns, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Mbox, msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Serial, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Refresh, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Retry, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Expire, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Minttl, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *SPF) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringTxt(rr.Txt, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *SRV) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Priority, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Weight, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Port, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.Target, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *SSHFP) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Type, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.FingerPrint, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *TA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.KeyTag, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Algorithm, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.DigestType, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Digest, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *TALINK) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.PreviousName, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = PackDomainName(rr.NextName, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *TKEY) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Algorithm, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Inception, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint32(rr.Expiration, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Mode, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Error, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.KeySize, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Key, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.OtherLen, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.OtherData, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *TLSA) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint8(rr.Usage, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.Selector, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint8(rr.MatchingType, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.Certificate, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *TSIG) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = PackDomainName(rr.Algorithm, msg, off, compression, false)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint48(rr.TimeSigned, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Fudge, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.MACSize, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.MAC, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.OrigId, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Error, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.OtherLen, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringHex(rr.OtherData, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *TXT) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packStringTxt(rr.Txt, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *UID) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint32(rr.Uid, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *UINFO) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packString(rr.Uinfo, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *URI) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packUint16(rr.Priority, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packUint16(rr.Weight, msg, off)
+	if err != nil {
+		return off, err
+	}
+	off, err = packStringOctet(rr.Target, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+func (rr *X25) pack(msg []byte, off int, compression map[string]int, compress bool) (int, error) {
+	off, err := rr.Hdr.pack(msg, off, compression, compress)
+	if err != nil {
+		return off, err
+	}
+	headerEnd := off
+	off, err = packString(rr.PSDNAddress, msg, off)
+	if err != nil {
+		return off, err
+	}
+	rr.Header().Rdlength = uint16(off - headerEnd)
+	return off, nil
+}
+
+// unpack*() functions
+
+func unpackA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(A)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.A, off, err = unpackDataA(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackAAAA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(AAAA)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.AAAA, off, err = unpackDataAAAA(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackAFSDB(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(AFSDB)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Subtype, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Hostname, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackANY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(ANY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	return rr, off, err
+}
+
+func unpackAVC(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(AVC)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Txt, off, err = unpackStringTxt(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackCAA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(CAA)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Flag, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Tag, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Value, off, err = unpackStringOctet(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackCDNSKEY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(CDNSKEY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Flags, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Protocol, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackCDS(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(CDS)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.DigestType, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackCERT(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(CERT)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Type, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Certificate, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackCNAME(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(CNAME)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Target, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackCSYNC(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(CSYNC)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Serial, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Flags, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.TypeBitMap, off, err = unpackDataNsec(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackDHCID(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(DHCID)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Digest, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackDLV(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(DLV)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.DigestType, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackDNAME(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(DNAME)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Target, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackDNSKEY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(DNSKEY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Flags, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Protocol, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackDS(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(DS)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.DigestType, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackEID(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(EID)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Endpoint, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackEUI48(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(EUI48)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Address, off, err = unpackUint48(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackEUI64(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(EUI64)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Address, off, err = unpackUint64(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackGID(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(GID)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Gid, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackGPOS(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(GPOS)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Longitude, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Latitude, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Altitude, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackHINFO(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(HINFO)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Cpu, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Os, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackHIP(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(HIP)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.HitLength, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.PublicKeyAlgorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.PublicKeyLength, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Hit, off, err = unpackStringHex(msg, off, off+int(rr.HitLength))
+	if err != nil {
+		return rr, off, err
+	}
+	rr.PublicKey, off, err = unpackStringBase64(msg, off, off+int(rr.PublicKeyLength))
+	if err != nil {
+		return rr, off, err
+	}
+	rr.RendezvousServers, off, err = unpackDataDomainNames(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackKEY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(KEY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Flags, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Protocol, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackKX(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(KX)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Exchanger, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackL32(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(L32)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Locator32, off, err = unpackDataA(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackL64(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(L64)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Locator64, off, err = unpackUint64(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackLOC(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(LOC)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Version, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Size, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.HorizPre, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.VertPre, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Latitude, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Longitude, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Altitude, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackLP(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(LP)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Fqdn, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMB(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MB)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Mb, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMD(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MD)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Md, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMF(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MF)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Mf, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMG(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MG)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Mg, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMINFO(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MINFO)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Rmail, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Email, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMR(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MR)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Mr, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackMX(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(MX)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Mx, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNAPTR(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NAPTR)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Order, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Flags, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Service, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Regexp, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Replacement, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNID(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NID)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.NodeID, off, err = unpackUint64(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNIMLOC(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NIMLOC)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Locator, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNINFO(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NINFO)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.ZSData, off, err = unpackStringTxt(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNS(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NS)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Ns, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNSAPPTR(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NSAPPTR)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Ptr, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNSEC(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NSEC)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.NextDomain, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.TypeBitMap, off, err = unpackDataNsec(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNSEC3(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NSEC3)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Hash, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Flags, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Iterations, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.SaltLength, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Salt, off, err = unpackStringHex(msg, off, off+int(rr.SaltLength))
+	if err != nil {
+		return rr, off, err
+	}
+	rr.HashLength, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.NextDomain, off, err = unpackStringBase32(msg, off, off+int(rr.HashLength))
+	if err != nil {
+		return rr, off, err
+	}
+	rr.TypeBitMap, off, err = unpackDataNsec(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackNSEC3PARAM(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(NSEC3PARAM)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Hash, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Flags, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Iterations, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.SaltLength, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Salt, off, err = unpackStringHex(msg, off, off+int(rr.SaltLength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackOPENPGPKEY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(OPENPGPKEY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackOPT(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(OPT)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Option, off, err = unpackDataOpt(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackPTR(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(PTR)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Ptr, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackPX(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(PX)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Map822, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Mapx400, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackRFC3597(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(RFC3597)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Rdata, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackRKEY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(RKEY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Flags, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Protocol, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.PublicKey, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackRP(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(RP)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Mbox, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Txt, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackRRSIG(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(RRSIG)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.TypeCovered, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Labels, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.OrigTtl, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Expiration, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Inception, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.SignerName, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Signature, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackRT(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(RT)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Preference, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Host, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackSIG(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(SIG)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.TypeCovered, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Labels, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.OrigTtl, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Expiration, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Inception, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.SignerName, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Signature, off, err = unpackStringBase64(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackSMIMEA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(SMIMEA)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Usage, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Selector, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.MatchingType, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Certificate, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackSOA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(SOA)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Ns, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Mbox, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Serial, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Refresh, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Retry, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Expire, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Minttl, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackSPF(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(SPF)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Txt, off, err = unpackStringTxt(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackSRV(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(SRV)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Priority, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Weight, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Port, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Target, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackSSHFP(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(SSHFP)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Type, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.FingerPrint, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackTA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(TA)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.KeyTag, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Algorithm, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.DigestType, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Digest, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackTALINK(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(TALINK)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.PreviousName, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.NextName, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackTKEY(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(TKEY)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Algorithm, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Inception, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Expiration, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Mode, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Error, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.KeySize, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Key, off, err = unpackStringHex(msg, off, off+int(rr.KeySize))
+	if err != nil {
+		return rr, off, err
+	}
+	rr.OtherLen, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.OtherData, off, err = unpackStringHex(msg, off, off+int(rr.OtherLen))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackTLSA(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(TLSA)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Usage, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Selector, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.MatchingType, off, err = unpackUint8(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Certificate, off, err = unpackStringHex(msg, off, rdStart+int(rr.Hdr.Rdlength))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackTSIG(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(TSIG)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Algorithm, off, err = UnpackDomainName(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.TimeSigned, off, err = unpackUint48(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Fudge, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.MACSize, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.MAC, off, err = unpackStringHex(msg, off, off+int(rr.MACSize))
+	if err != nil {
+		return rr, off, err
+	}
+	rr.OrigId, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Error, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.OtherLen, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.OtherData, off, err = unpackStringHex(msg, off, off+int(rr.OtherLen))
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackTXT(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(TXT)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Txt, off, err = unpackStringTxt(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackUID(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(UID)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Uid, off, err = unpackUint32(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackUINFO(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(UINFO)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Uinfo, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackURI(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(URI)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.Priority, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Weight, off, err = unpackUint16(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	if off == len(msg) {
+		return rr, off, nil
+	}
+	rr.Target, off, err = unpackStringOctet(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+func unpackX25(h RR_Header, msg []byte, off int) (RR, int, error) {
+	rr := new(X25)
+	rr.Hdr = h
+	if noRdata(h) {
+		return rr, off, nil
+	}
+	var err error
+	rdStart := off
+	_ = rdStart
+
+	rr.PSDNAddress, off, err = unpackString(msg, off)
+	if err != nil {
+		return rr, off, err
+	}
+	return rr, off, err
+}
+
+var typeToUnpack = map[uint16]func(RR_Header, []byte, int) (RR, int, error){
+	TypeA:          unpackA,
+	TypeAAAA:       unpackAAAA,
+	TypeAFSDB:      unpackAFSDB,
+	TypeANY:        unpackANY,
+	TypeAVC:        unpackAVC,
+	TypeCAA:        unpackCAA,
+	TypeCDNSKEY:    unpackCDNSKEY,
+	TypeCDS:        unpackCDS,
+	TypeCERT:       unpackCERT,
+	TypeCNAME:      unpackCNAME,
+	TypeCSYNC:      unpackCSYNC,
+	TypeDHCID:      unpackDHCID,
+	TypeDLV:        unpackDLV,
+	TypeDNAME:      unpackDNAME,
+	TypeDNSKEY:     unpackDNSKEY,
+	TypeDS:         unpackDS,
+	TypeEID:        unpackEID,
+	TypeEUI48:      unpackEUI48,
+	TypeEUI64:      unpackEUI64,
+	TypeGID:        unpackGID,
+	TypeGPOS:       unpackGPOS,
+	TypeHINFO:      unpackHINFO,
+	TypeHIP:        unpackHIP,
+	TypeKEY:        unpackKEY,
+	TypeKX:         unpackKX,
+	TypeL32:        unpackL32,
+	TypeL64:        unpackL64,
+	TypeLOC:        unpackLOC,
+	TypeLP:         unpackLP,
+	TypeMB:         unpackMB,
+	TypeMD:         unpackMD,
+	TypeMF:         unpackMF,
+	TypeMG:         unpackMG,
+	TypeMINFO:      unpackMINFO,
+	TypeMR:         unpackMR,
+	TypeMX:         unpackMX,
+	TypeNAPTR:      unpackNAPTR,
+	TypeNID:        unpackNID,
+	TypeNIMLOC:     unpackNIMLOC,
+	TypeNINFO:      unpackNINFO,
+	TypeNS:         unpackNS,
+	TypeNSAPPTR:    unpackNSAPPTR,
+	TypeNSEC:       unpackNSEC,
+	TypeNSEC3:      unpackNSEC3,
+	TypeNSEC3PARAM: unpackNSEC3PARAM,
+	TypeOPENPGPKEY: unpackOPENPGPKEY,
+	TypeOPT:        unpackOPT,
+	TypePTR:        unpackPTR,
+	TypePX:         unpackPX,
+	TypeRKEY:       unpackRKEY,
+	TypeRP:         unpackRP,
+	TypeRRSIG:      unpackRRSIG,
+	TypeRT:         unpackRT,
+	TypeSIG:        unpackSIG,
+	TypeSMIMEA:     unpackSMIMEA,
+	TypeSOA:        unpackSOA,
+	TypeSPF:        unpackSPF,
+	TypeSRV:        unpackSRV,
+	TypeSSHFP:      unpackSSHFP,
+	TypeTA:         unpackTA,
+	TypeTALINK:     unpackTALINK,
+	TypeTKEY:       unpackTKEY,
+	TypeTLSA:       unpackTLSA,
+	TypeTSIG:       unpackTSIG,
+	TypeTXT:        unpackTXT,
+	TypeUID:        unpackUID,
+	TypeUINFO:      unpackUINFO,
+	TypeURI:        unpackURI,
+	TypeX25:        unpackX25,
+}
diff --git a/vendor/github.com/miekg/dns/ztypes.go b/vendor/github.com/miekg/dns/ztypes.go
new file mode 100644
index 0000000..abd75dd
--- /dev/null
+++ b/vendor/github.com/miekg/dns/ztypes.go
@@ -0,0 +1,863 @@
+// Code generated by "go run types_generate.go"; DO NOT EDIT.
+
+package dns
+
+import (
+	"encoding/base64"
+	"net"
+)
+
+// TypeToRR is a map of constructors for each RR type.
+var TypeToRR = map[uint16]func() RR{
+	TypeA:          func() RR { return new(A) },
+	TypeAAAA:       func() RR { return new(AAAA) },
+	TypeAFSDB:      func() RR { return new(AFSDB) },
+	TypeANY:        func() RR { return new(ANY) },
+	TypeAVC:        func() RR { return new(AVC) },
+	TypeCAA:        func() RR { return new(CAA) },
+	TypeCDNSKEY:    func() RR { return new(CDNSKEY) },
+	TypeCDS:        func() RR { return new(CDS) },
+	TypeCERT:       func() RR { return new(CERT) },
+	TypeCNAME:      func() RR { return new(CNAME) },
+	TypeCSYNC:      func() RR { return new(CSYNC) },
+	TypeDHCID:      func() RR { return new(DHCID) },
+	TypeDLV:        func() RR { return new(DLV) },
+	TypeDNAME:      func() RR { return new(DNAME) },
+	TypeDNSKEY:     func() RR { return new(DNSKEY) },
+	TypeDS:         func() RR { return new(DS) },
+	TypeEID:        func() RR { return new(EID) },
+	TypeEUI48:      func() RR { return new(EUI48) },
+	TypeEUI64:      func() RR { return new(EUI64) },
+	TypeGID:        func() RR { return new(GID) },
+	TypeGPOS:       func() RR { return new(GPOS) },
+	TypeHINFO:      func() RR { return new(HINFO) },
+	TypeHIP:        func() RR { return new(HIP) },
+	TypeKEY:        func() RR { return new(KEY) },
+	TypeKX:         func() RR { return new(KX) },
+	TypeL32:        func() RR { return new(L32) },
+	TypeL64:        func() RR { return new(L64) },
+	TypeLOC:        func() RR { return new(LOC) },
+	TypeLP:         func() RR { return new(LP) },
+	TypeMB:         func() RR { return new(MB) },
+	TypeMD:         func() RR { return new(MD) },
+	TypeMF:         func() RR { return new(MF) },
+	TypeMG:         func() RR { return new(MG) },
+	TypeMINFO:      func() RR { return new(MINFO) },
+	TypeMR:         func() RR { return new(MR) },
+	TypeMX:         func() RR { return new(MX) },
+	TypeNAPTR:      func() RR { return new(NAPTR) },
+	TypeNID:        func() RR { return new(NID) },
+	TypeNIMLOC:     func() RR { return new(NIMLOC) },
+	TypeNINFO:      func() RR { return new(NINFO) },
+	TypeNS:         func() RR { return new(NS) },
+	TypeNSAPPTR:    func() RR { return new(NSAPPTR) },
+	TypeNSEC:       func() RR { return new(NSEC) },
+	TypeNSEC3:      func() RR { return new(NSEC3) },
+	TypeNSEC3PARAM: func() RR { return new(NSEC3PARAM) },
+	TypeOPENPGPKEY: func() RR { return new(OPENPGPKEY) },
+	TypeOPT:        func() RR { return new(OPT) },
+	TypePTR:        func() RR { return new(PTR) },
+	TypePX:         func() RR { return new(PX) },
+	TypeRKEY:       func() RR { return new(RKEY) },
+	TypeRP:         func() RR { return new(RP) },
+	TypeRRSIG:      func() RR { return new(RRSIG) },
+	TypeRT:         func() RR { return new(RT) },
+	TypeSIG:        func() RR { return new(SIG) },
+	TypeSMIMEA:     func() RR { return new(SMIMEA) },
+	TypeSOA:        func() RR { return new(SOA) },
+	TypeSPF:        func() RR { return new(SPF) },
+	TypeSRV:        func() RR { return new(SRV) },
+	TypeSSHFP:      func() RR { return new(SSHFP) },
+	TypeTA:         func() RR { return new(TA) },
+	TypeTALINK:     func() RR { return new(TALINK) },
+	TypeTKEY:       func() RR { return new(TKEY) },
+	TypeTLSA:       func() RR { return new(TLSA) },
+	TypeTSIG:       func() RR { return new(TSIG) },
+	TypeTXT:        func() RR { return new(TXT) },
+	TypeUID:        func() RR { return new(UID) },
+	TypeUINFO:      func() RR { return new(UINFO) },
+	TypeURI:        func() RR { return new(URI) },
+	TypeX25:        func() RR { return new(X25) },
+}
+
+// TypeToString is a map of strings for each RR type.
+var TypeToString = map[uint16]string{
+	TypeA:          "A",
+	TypeAAAA:       "AAAA",
+	TypeAFSDB:      "AFSDB",
+	TypeANY:        "ANY",
+	TypeATMA:       "ATMA",
+	TypeAVC:        "AVC",
+	TypeAXFR:       "AXFR",
+	TypeCAA:        "CAA",
+	TypeCDNSKEY:    "CDNSKEY",
+	TypeCDS:        "CDS",
+	TypeCERT:       "CERT",
+	TypeCNAME:      "CNAME",
+	TypeCSYNC:      "CSYNC",
+	TypeDHCID:      "DHCID",
+	TypeDLV:        "DLV",
+	TypeDNAME:      "DNAME",
+	TypeDNSKEY:     "DNSKEY",
+	TypeDS:         "DS",
+	TypeEID:        "EID",
+	TypeEUI48:      "EUI48",
+	TypeEUI64:      "EUI64",
+	TypeGID:        "GID",
+	TypeGPOS:       "GPOS",
+	TypeHINFO:      "HINFO",
+	TypeHIP:        "HIP",
+	TypeISDN:       "ISDN",
+	TypeIXFR:       "IXFR",
+	TypeKEY:        "KEY",
+	TypeKX:         "KX",
+	TypeL32:        "L32",
+	TypeL64:        "L64",
+	TypeLOC:        "LOC",
+	TypeLP:         "LP",
+	TypeMAILA:      "MAILA",
+	TypeMAILB:      "MAILB",
+	TypeMB:         "MB",
+	TypeMD:         "MD",
+	TypeMF:         "MF",
+	TypeMG:         "MG",
+	TypeMINFO:      "MINFO",
+	TypeMR:         "MR",
+	TypeMX:         "MX",
+	TypeNAPTR:      "NAPTR",
+	TypeNID:        "NID",
+	TypeNIMLOC:     "NIMLOC",
+	TypeNINFO:      "NINFO",
+	TypeNS:         "NS",
+	TypeNSEC:       "NSEC",
+	TypeNSEC3:      "NSEC3",
+	TypeNSEC3PARAM: "NSEC3PARAM",
+	TypeNULL:       "NULL",
+	TypeNXT:        "NXT",
+	TypeNone:       "None",
+	TypeOPENPGPKEY: "OPENPGPKEY",
+	TypeOPT:        "OPT",
+	TypePTR:        "PTR",
+	TypePX:         "PX",
+	TypeRKEY:       "RKEY",
+	TypeRP:         "RP",
+	TypeRRSIG:      "RRSIG",
+	TypeRT:         "RT",
+	TypeReserved:   "Reserved",
+	TypeSIG:        "SIG",
+	TypeSMIMEA:     "SMIMEA",
+	TypeSOA:        "SOA",
+	TypeSPF:        "SPF",
+	TypeSRV:        "SRV",
+	TypeSSHFP:      "SSHFP",
+	TypeTA:         "TA",
+	TypeTALINK:     "TALINK",
+	TypeTKEY:       "TKEY",
+	TypeTLSA:       "TLSA",
+	TypeTSIG:       "TSIG",
+	TypeTXT:        "TXT",
+	TypeUID:        "UID",
+	TypeUINFO:      "UINFO",
+	TypeUNSPEC:     "UNSPEC",
+	TypeURI:        "URI",
+	TypeX25:        "X25",
+	TypeNSAPPTR:    "NSAP-PTR",
+}
+
+func (rr *A) Header() *RR_Header          { return &rr.Hdr }
+func (rr *AAAA) Header() *RR_Header       { return &rr.Hdr }
+func (rr *AFSDB) Header() *RR_Header      { return &rr.Hdr }
+func (rr *ANY) Header() *RR_Header        { return &rr.Hdr }
+func (rr *AVC) Header() *RR_Header        { return &rr.Hdr }
+func (rr *CAA) Header() *RR_Header        { return &rr.Hdr }
+func (rr *CDNSKEY) Header() *RR_Header    { return &rr.Hdr }
+func (rr *CDS) Header() *RR_Header        { return &rr.Hdr }
+func (rr *CERT) Header() *RR_Header       { return &rr.Hdr }
+func (rr *CNAME) Header() *RR_Header      { return &rr.Hdr }
+func (rr *CSYNC) Header() *RR_Header      { return &rr.Hdr }
+func (rr *DHCID) Header() *RR_Header      { return &rr.Hdr }
+func (rr *DLV) Header() *RR_Header        { return &rr.Hdr }
+func (rr *DNAME) Header() *RR_Header      { return &rr.Hdr }
+func (rr *DNSKEY) Header() *RR_Header     { return &rr.Hdr }
+func (rr *DS) Header() *RR_Header         { return &rr.Hdr }
+func (rr *EID) Header() *RR_Header        { return &rr.Hdr }
+func (rr *EUI48) Header() *RR_Header      { return &rr.Hdr }
+func (rr *EUI64) Header() *RR_Header      { return &rr.Hdr }
+func (rr *GID) Header() *RR_Header        { return &rr.Hdr }
+func (rr *GPOS) Header() *RR_Header       { return &rr.Hdr }
+func (rr *HINFO) Header() *RR_Header      { return &rr.Hdr }
+func (rr *HIP) Header() *RR_Header        { return &rr.Hdr }
+func (rr *KEY) Header() *RR_Header        { return &rr.Hdr }
+func (rr *KX) Header() *RR_Header         { return &rr.Hdr }
+func (rr *L32) Header() *RR_Header        { return &rr.Hdr }
+func (rr *L64) Header() *RR_Header        { return &rr.Hdr }
+func (rr *LOC) Header() *RR_Header        { return &rr.Hdr }
+func (rr *LP) Header() *RR_Header         { return &rr.Hdr }
+func (rr *MB) Header() *RR_Header         { return &rr.Hdr }
+func (rr *MD) Header() *RR_Header         { return &rr.Hdr }
+func (rr *MF) Header() *RR_Header         { return &rr.Hdr }
+func (rr *MG) Header() *RR_Header         { return &rr.Hdr }
+func (rr *MINFO) Header() *RR_Header      { return &rr.Hdr }
+func (rr *MR) Header() *RR_Header         { return &rr.Hdr }
+func (rr *MX) Header() *RR_Header         { return &rr.Hdr }
+func (rr *NAPTR) Header() *RR_Header      { return &rr.Hdr }
+func (rr *NID) Header() *RR_Header        { return &rr.Hdr }
+func (rr *NIMLOC) Header() *RR_Header     { return &rr.Hdr }
+func (rr *NINFO) Header() *RR_Header      { return &rr.Hdr }
+func (rr *NS) Header() *RR_Header         { return &rr.Hdr }
+func (rr *NSAPPTR) Header() *RR_Header    { return &rr.Hdr }
+func (rr *NSEC) Header() *RR_Header       { return &rr.Hdr }
+func (rr *NSEC3) Header() *RR_Header      { return &rr.Hdr }
+func (rr *NSEC3PARAM) Header() *RR_Header { return &rr.Hdr }
+func (rr *OPENPGPKEY) Header() *RR_Header { return &rr.Hdr }
+func (rr *OPT) Header() *RR_Header        { return &rr.Hdr }
+func (rr *PTR) Header() *RR_Header        { return &rr.Hdr }
+func (rr *PX) Header() *RR_Header         { return &rr.Hdr }
+func (rr *RFC3597) Header() *RR_Header    { return &rr.Hdr }
+func (rr *RKEY) Header() *RR_Header       { return &rr.Hdr }
+func (rr *RP) Header() *RR_Header         { return &rr.Hdr }
+func (rr *RRSIG) Header() *RR_Header      { return &rr.Hdr }
+func (rr *RT) Header() *RR_Header         { return &rr.Hdr }
+func (rr *SIG) Header() *RR_Header        { return &rr.Hdr }
+func (rr *SMIMEA) Header() *RR_Header     { return &rr.Hdr }
+func (rr *SOA) Header() *RR_Header        { return &rr.Hdr }
+func (rr *SPF) Header() *RR_Header        { return &rr.Hdr }
+func (rr *SRV) Header() *RR_Header        { return &rr.Hdr }
+func (rr *SSHFP) Header() *RR_Header      { return &rr.Hdr }
+func (rr *TA) Header() *RR_Header         { return &rr.Hdr }
+func (rr *TALINK) Header() *RR_Header     { return &rr.Hdr }
+func (rr *TKEY) Header() *RR_Header       { return &rr.Hdr }
+func (rr *TLSA) Header() *RR_Header       { return &rr.Hdr }
+func (rr *TSIG) Header() *RR_Header       { return &rr.Hdr }
+func (rr *TXT) Header() *RR_Header        { return &rr.Hdr }
+func (rr *UID) Header() *RR_Header        { return &rr.Hdr }
+func (rr *UINFO) Header() *RR_Header      { return &rr.Hdr }
+func (rr *URI) Header() *RR_Header        { return &rr.Hdr }
+func (rr *X25) Header() *RR_Header        { return &rr.Hdr }
+
+// len() functions
+func (rr *A) len() int {
+	l := rr.Hdr.len()
+	l += net.IPv4len // A
+	return l
+}
+func (rr *AAAA) len() int {
+	l := rr.Hdr.len()
+	l += net.IPv6len // AAAA
+	return l
+}
+func (rr *AFSDB) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Subtype
+	l += len(rr.Hostname) + 1
+	return l
+}
+func (rr *ANY) len() int {
+	l := rr.Hdr.len()
+	return l
+}
+func (rr *AVC) len() int {
+	l := rr.Hdr.len()
+	for _, x := range rr.Txt {
+		l += len(x) + 1
+	}
+	return l
+}
+func (rr *CAA) len() int {
+	l := rr.Hdr.len()
+	l++ // Flag
+	l += len(rr.Tag) + 1
+	l += len(rr.Value)
+	return l
+}
+func (rr *CERT) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Type
+	l += 2 // KeyTag
+	l++    // Algorithm
+	l += base64.StdEncoding.DecodedLen(len(rr.Certificate))
+	return l
+}
+func (rr *CNAME) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Target) + 1
+	return l
+}
+func (rr *DHCID) len() int {
+	l := rr.Hdr.len()
+	l += base64.StdEncoding.DecodedLen(len(rr.Digest))
+	return l
+}
+func (rr *DNAME) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Target) + 1
+	return l
+}
+func (rr *DNSKEY) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Flags
+	l++    // Protocol
+	l++    // Algorithm
+	l += base64.StdEncoding.DecodedLen(len(rr.PublicKey))
+	return l
+}
+func (rr *DS) len() int {
+	l := rr.Hdr.len()
+	l += 2 // KeyTag
+	l++    // Algorithm
+	l++    // DigestType
+	l += len(rr.Digest)/2 + 1
+	return l
+}
+func (rr *EID) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Endpoint)/2 + 1
+	return l
+}
+func (rr *EUI48) len() int {
+	l := rr.Hdr.len()
+	l += 6 // Address
+	return l
+}
+func (rr *EUI64) len() int {
+	l := rr.Hdr.len()
+	l += 8 // Address
+	return l
+}
+func (rr *GID) len() int {
+	l := rr.Hdr.len()
+	l += 4 // Gid
+	return l
+}
+func (rr *GPOS) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Longitude) + 1
+	l += len(rr.Latitude) + 1
+	l += len(rr.Altitude) + 1
+	return l
+}
+func (rr *HINFO) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Cpu) + 1
+	l += len(rr.Os) + 1
+	return l
+}
+func (rr *HIP) len() int {
+	l := rr.Hdr.len()
+	l++    // HitLength
+	l++    // PublicKeyAlgorithm
+	l += 2 // PublicKeyLength
+	l += len(rr.Hit) / 2
+	l += base64.StdEncoding.DecodedLen(len(rr.PublicKey))
+	for _, x := range rr.RendezvousServers {
+		l += len(x) + 1
+	}
+	return l
+}
+func (rr *KX) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += len(rr.Exchanger) + 1
+	return l
+}
+func (rr *L32) len() int {
+	l := rr.Hdr.len()
+	l += 2           // Preference
+	l += net.IPv4len // Locator32
+	return l
+}
+func (rr *L64) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += 8 // Locator64
+	return l
+}
+func (rr *LOC) len() int {
+	l := rr.Hdr.len()
+	l++    // Version
+	l++    // Size
+	l++    // HorizPre
+	l++    // VertPre
+	l += 4 // Latitude
+	l += 4 // Longitude
+	l += 4 // Altitude
+	return l
+}
+func (rr *LP) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += len(rr.Fqdn) + 1
+	return l
+}
+func (rr *MB) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Mb) + 1
+	return l
+}
+func (rr *MD) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Md) + 1
+	return l
+}
+func (rr *MF) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Mf) + 1
+	return l
+}
+func (rr *MG) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Mg) + 1
+	return l
+}
+func (rr *MINFO) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Rmail) + 1
+	l += len(rr.Email) + 1
+	return l
+}
+func (rr *MR) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Mr) + 1
+	return l
+}
+func (rr *MX) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += len(rr.Mx) + 1
+	return l
+}
+func (rr *NAPTR) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Order
+	l += 2 // Preference
+	l += len(rr.Flags) + 1
+	l += len(rr.Service) + 1
+	l += len(rr.Regexp) + 1
+	l += len(rr.Replacement) + 1
+	return l
+}
+func (rr *NID) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += 8 // NodeID
+	return l
+}
+func (rr *NIMLOC) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Locator)/2 + 1
+	return l
+}
+func (rr *NINFO) len() int {
+	l := rr.Hdr.len()
+	for _, x := range rr.ZSData {
+		l += len(x) + 1
+	}
+	return l
+}
+func (rr *NS) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Ns) + 1
+	return l
+}
+func (rr *NSAPPTR) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Ptr) + 1
+	return l
+}
+func (rr *NSEC3PARAM) len() int {
+	l := rr.Hdr.len()
+	l++    // Hash
+	l++    // Flags
+	l += 2 // Iterations
+	l++    // SaltLength
+	l += len(rr.Salt) / 2
+	return l
+}
+func (rr *OPENPGPKEY) len() int {
+	l := rr.Hdr.len()
+	l += base64.StdEncoding.DecodedLen(len(rr.PublicKey))
+	return l
+}
+func (rr *PTR) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Ptr) + 1
+	return l
+}
+func (rr *PX) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += len(rr.Map822) + 1
+	l += len(rr.Mapx400) + 1
+	return l
+}
+func (rr *RFC3597) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Rdata)/2 + 1
+	return l
+}
+func (rr *RKEY) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Flags
+	l++    // Protocol
+	l++    // Algorithm
+	l += base64.StdEncoding.DecodedLen(len(rr.PublicKey))
+	return l
+}
+func (rr *RP) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Mbox) + 1
+	l += len(rr.Txt) + 1
+	return l
+}
+func (rr *RRSIG) len() int {
+	l := rr.Hdr.len()
+	l += 2 // TypeCovered
+	l++    // Algorithm
+	l++    // Labels
+	l += 4 // OrigTtl
+	l += 4 // Expiration
+	l += 4 // Inception
+	l += 2 // KeyTag
+	l += len(rr.SignerName) + 1
+	l += base64.StdEncoding.DecodedLen(len(rr.Signature))
+	return l
+}
+func (rr *RT) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Preference
+	l += len(rr.Host) + 1
+	return l
+}
+func (rr *SMIMEA) len() int {
+	l := rr.Hdr.len()
+	l++ // Usage
+	l++ // Selector
+	l++ // MatchingType
+	l += len(rr.Certificate)/2 + 1
+	return l
+}
+func (rr *SOA) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Ns) + 1
+	l += len(rr.Mbox) + 1
+	l += 4 // Serial
+	l += 4 // Refresh
+	l += 4 // Retry
+	l += 4 // Expire
+	l += 4 // Minttl
+	return l
+}
+func (rr *SPF) len() int {
+	l := rr.Hdr.len()
+	for _, x := range rr.Txt {
+		l += len(x) + 1
+	}
+	return l
+}
+func (rr *SRV) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Priority
+	l += 2 // Weight
+	l += 2 // Port
+	l += len(rr.Target) + 1
+	return l
+}
+func (rr *SSHFP) len() int {
+	l := rr.Hdr.len()
+	l++ // Algorithm
+	l++ // Type
+	l += len(rr.FingerPrint)/2 + 1
+	return l
+}
+func (rr *TA) len() int {
+	l := rr.Hdr.len()
+	l += 2 // KeyTag
+	l++    // Algorithm
+	l++    // DigestType
+	l += len(rr.Digest)/2 + 1
+	return l
+}
+func (rr *TALINK) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.PreviousName) + 1
+	l += len(rr.NextName) + 1
+	return l
+}
+func (rr *TKEY) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Algorithm) + 1
+	l += 4 // Inception
+	l += 4 // Expiration
+	l += 2 // Mode
+	l += 2 // Error
+	l += 2 // KeySize
+	l += len(rr.Key) / 2
+	l += 2 // OtherLen
+	l += len(rr.OtherData) / 2
+	return l
+}
+func (rr *TLSA) len() int {
+	l := rr.Hdr.len()
+	l++ // Usage
+	l++ // Selector
+	l++ // MatchingType
+	l += len(rr.Certificate)/2 + 1
+	return l
+}
+func (rr *TSIG) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Algorithm) + 1
+	l += 6 // TimeSigned
+	l += 2 // Fudge
+	l += 2 // MACSize
+	l += len(rr.MAC) / 2
+	l += 2 // OrigId
+	l += 2 // Error
+	l += 2 // OtherLen
+	l += len(rr.OtherData) / 2
+	return l
+}
+func (rr *TXT) len() int {
+	l := rr.Hdr.len()
+	for _, x := range rr.Txt {
+		l += len(x) + 1
+	}
+	return l
+}
+func (rr *UID) len() int {
+	l := rr.Hdr.len()
+	l += 4 // Uid
+	return l
+}
+func (rr *UINFO) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.Uinfo) + 1
+	return l
+}
+func (rr *URI) len() int {
+	l := rr.Hdr.len()
+	l += 2 // Priority
+	l += 2 // Weight
+	l += len(rr.Target)
+	return l
+}
+func (rr *X25) len() int {
+	l := rr.Hdr.len()
+	l += len(rr.PSDNAddress) + 1
+	return l
+}
+
+// copy() functions
+func (rr *A) copy() RR {
+	return &A{*rr.Hdr.copyHeader(), copyIP(rr.A)}
+}
+func (rr *AAAA) copy() RR {
+	return &AAAA{*rr.Hdr.copyHeader(), copyIP(rr.AAAA)}
+}
+func (rr *AFSDB) copy() RR {
+	return &AFSDB{*rr.Hdr.copyHeader(), rr.Subtype, rr.Hostname}
+}
+func (rr *ANY) copy() RR {
+	return &ANY{*rr.Hdr.copyHeader()}
+}
+func (rr *AVC) copy() RR {
+	Txt := make([]string, len(rr.Txt))
+	copy(Txt, rr.Txt)
+	return &AVC{*rr.Hdr.copyHeader(), Txt}
+}
+func (rr *CAA) copy() RR {
+	return &CAA{*rr.Hdr.copyHeader(), rr.Flag, rr.Tag, rr.Value}
+}
+func (rr *CERT) copy() RR {
+	return &CERT{*rr.Hdr.copyHeader(), rr.Type, rr.KeyTag, rr.Algorithm, rr.Certificate}
+}
+func (rr *CNAME) copy() RR {
+	return &CNAME{*rr.Hdr.copyHeader(), rr.Target}
+}
+func (rr *CSYNC) copy() RR {
+	TypeBitMap := make([]uint16, len(rr.TypeBitMap))
+	copy(TypeBitMap, rr.TypeBitMap)
+	return &CSYNC{*rr.Hdr.copyHeader(), rr.Serial, rr.Flags, TypeBitMap}
+}
+func (rr *DHCID) copy() RR {
+	return &DHCID{*rr.Hdr.copyHeader(), rr.Digest}
+}
+func (rr *DNAME) copy() RR {
+	return &DNAME{*rr.Hdr.copyHeader(), rr.Target}
+}
+func (rr *DNSKEY) copy() RR {
+	return &DNSKEY{*rr.Hdr.copyHeader(), rr.Flags, rr.Protocol, rr.Algorithm, rr.PublicKey}
+}
+func (rr *DS) copy() RR {
+	return &DS{*rr.Hdr.copyHeader(), rr.KeyTag, rr.Algorithm, rr.DigestType, rr.Digest}
+}
+func (rr *EID) copy() RR {
+	return &EID{*rr.Hdr.copyHeader(), rr.Endpoint}
+}
+func (rr *EUI48) copy() RR {
+	return &EUI48{*rr.Hdr.copyHeader(), rr.Address}
+}
+func (rr *EUI64) copy() RR {
+	return &EUI64{*rr.Hdr.copyHeader(), rr.Address}
+}
+func (rr *GID) copy() RR {
+	return &GID{*rr.Hdr.copyHeader(), rr.Gid}
+}
+func (rr *GPOS) copy() RR {
+	return &GPOS{*rr.Hdr.copyHeader(), rr.Longitude, rr.Latitude, rr.Altitude}
+}
+func (rr *HINFO) copy() RR {
+	return &HINFO{*rr.Hdr.copyHeader(), rr.Cpu, rr.Os}
+}
+func (rr *HIP) copy() RR {
+	RendezvousServers := make([]string, len(rr.RendezvousServers))
+	copy(RendezvousServers, rr.RendezvousServers)
+	return &HIP{*rr.Hdr.copyHeader(), rr.HitLength, rr.PublicKeyAlgorithm, rr.PublicKeyLength, rr.Hit, rr.PublicKey, RendezvousServers}
+}
+func (rr *KX) copy() RR {
+	return &KX{*rr.Hdr.copyHeader(), rr.Preference, rr.Exchanger}
+}
+func (rr *L32) copy() RR {
+	return &L32{*rr.Hdr.copyHeader(), rr.Preference, copyIP(rr.Locator32)}
+}
+func (rr *L64) copy() RR {
+	return &L64{*rr.Hdr.copyHeader(), rr.Preference, rr.Locator64}
+}
+func (rr *LOC) copy() RR {
+	return &LOC{*rr.Hdr.copyHeader(), rr.Version, rr.Size, rr.HorizPre, rr.VertPre, rr.Latitude, rr.Longitude, rr.Altitude}
+}
+func (rr *LP) copy() RR {
+	return &LP{*rr.Hdr.copyHeader(), rr.Preference, rr.Fqdn}
+}
+func (rr *MB) copy() RR {
+	return &MB{*rr.Hdr.copyHeader(), rr.Mb}
+}
+func (rr *MD) copy() RR {
+	return &MD{*rr.Hdr.copyHeader(), rr.Md}
+}
+func (rr *MF) copy() RR {
+	return &MF{*rr.Hdr.copyHeader(), rr.Mf}
+}
+func (rr *MG) copy() RR {
+	return &MG{*rr.Hdr.copyHeader(), rr.Mg}
+}
+func (rr *MINFO) copy() RR {
+	return &MINFO{*rr.Hdr.copyHeader(), rr.Rmail, rr.Email}
+}
+func (rr *MR) copy() RR {
+	return &MR{*rr.Hdr.copyHeader(), rr.Mr}
+}
+func (rr *MX) copy() RR {
+	return &MX{*rr.Hdr.copyHeader(), rr.Preference, rr.Mx}
+}
+func (rr *NAPTR) copy() RR {
+	return &NAPTR{*rr.Hdr.copyHeader(), rr.Order, rr.Preference, rr.Flags, rr.Service, rr.Regexp, rr.Replacement}
+}
+func (rr *NID) copy() RR {
+	return &NID{*rr.Hdr.copyHeader(), rr.Preference, rr.NodeID}
+}
+func (rr *NIMLOC) copy() RR {
+	return &NIMLOC{*rr.Hdr.copyHeader(), rr.Locator}
+}
+func (rr *NINFO) copy() RR {
+	ZSData := make([]string, len(rr.ZSData))
+	copy(ZSData, rr.ZSData)
+	return &NINFO{*rr.Hdr.copyHeader(), ZSData}
+}
+func (rr *NS) copy() RR {
+	return &NS{*rr.Hdr.copyHeader(), rr.Ns}
+}
+func (rr *NSAPPTR) copy() RR {
+	return &NSAPPTR{*rr.Hdr.copyHeader(), rr.Ptr}
+}
+func (rr *NSEC) copy() RR {
+	TypeBitMap := make([]uint16, len(rr.TypeBitMap))
+	copy(TypeBitMap, rr.TypeBitMap)
+	return &NSEC{*rr.Hdr.copyHeader(), rr.NextDomain, TypeBitMap}
+}
+func (rr *NSEC3) copy() RR {
+	TypeBitMap := make([]uint16, len(rr.TypeBitMap))
+	copy(TypeBitMap, rr.TypeBitMap)
+	return &NSEC3{*rr.Hdr.copyHeader(), rr.Hash, rr.Flags, rr.Iterations, rr.SaltLength, rr.Salt, rr.HashLength, rr.NextDomain, TypeBitMap}
+}
+func (rr *NSEC3PARAM) copy() RR {
+	return &NSEC3PARAM{*rr.Hdr.copyHeader(), rr.Hash, rr.Flags, rr.Iterations, rr.SaltLength, rr.Salt}
+}
+func (rr *OPENPGPKEY) copy() RR {
+	return &OPENPGPKEY{*rr.Hdr.copyHeader(), rr.PublicKey}
+}
+func (rr *OPT) copy() RR {
+	Option := make([]EDNS0, len(rr.Option))
+	copy(Option, rr.Option)
+	return &OPT{*rr.Hdr.copyHeader(), Option}
+}
+func (rr *PTR) copy() RR {
+	return &PTR{*rr.Hdr.copyHeader(), rr.Ptr}
+}
+func (rr *PX) copy() RR {
+	return &PX{*rr.Hdr.copyHeader(), rr.Preference, rr.Map822, rr.Mapx400}
+}
+func (rr *RFC3597) copy() RR {
+	return &RFC3597{*rr.Hdr.copyHeader(), rr.Rdata}
+}
+func (rr *RKEY) copy() RR {
+	return &RKEY{*rr.Hdr.copyHeader(), rr.Flags, rr.Protocol, rr.Algorithm, rr.PublicKey}
+}
+func (rr *RP) copy() RR {
+	return &RP{*rr.Hdr.copyHeader(), rr.Mbox, rr.Txt}
+}
+func (rr *RRSIG) copy() RR {
+	return &RRSIG{*rr.Hdr.copyHeader(), rr.TypeCovered, rr.Algorithm, rr.Labels, rr.OrigTtl, rr.Expiration, rr.Inception, rr.KeyTag, rr.SignerName, rr.Signature}
+}
+func (rr *RT) copy() RR {
+	return &RT{*rr.Hdr.copyHeader(), rr.Preference, rr.Host}
+}
+func (rr *SMIMEA) copy() RR {
+	return &SMIMEA{*rr.Hdr.copyHeader(), rr.Usage, rr.Selector, rr.MatchingType, rr.Certificate}
+}
+func (rr *SOA) copy() RR {
+	return &SOA{*rr.Hdr.copyHeader(), rr.Ns, rr.Mbox, rr.Serial, rr.Refresh, rr.Retry, rr.Expire, rr.Minttl}
+}
+func (rr *SPF) copy() RR {
+	Txt := make([]string, len(rr.Txt))
+	copy(Txt, rr.Txt)
+	return &SPF{*rr.Hdr.copyHeader(), Txt}
+}
+func (rr *SRV) copy() RR {
+	return &SRV{*rr.Hdr.copyHeader(), rr.Priority, rr.Weight, rr.Port, rr.Target}
+}
+func (rr *SSHFP) copy() RR {
+	return &SSHFP{*rr.Hdr.copyHeader(), rr.Algorithm, rr.Type, rr.FingerPrint}
+}
+func (rr *TA) copy() RR {
+	return &TA{*rr.Hdr.copyHeader(), rr.KeyTag, rr.Algorithm, rr.DigestType, rr.Digest}
+}
+func (rr *TALINK) copy() RR {
+	return &TALINK{*rr.Hdr.copyHeader(), rr.PreviousName, rr.NextName}
+}
+func (rr *TKEY) copy() RR {
+	return &TKEY{*rr.Hdr.copyHeader(), rr.Algorithm, rr.Inception, rr.Expiration, rr.Mode, rr.Error, rr.KeySize, rr.Key, rr.OtherLen, rr.OtherData}
+}
+func (rr *TLSA) copy() RR {
+	return &TLSA{*rr.Hdr.copyHeader(), rr.Usage, rr.Selector, rr.MatchingType, rr.Certificate}
+}
+func (rr *TSIG) copy() RR {
+	return &TSIG{*rr.Hdr.copyHeader(), rr.Algorithm, rr.TimeSigned, rr.Fudge, rr.MACSize, rr.MAC, rr.OrigId, rr.Error, rr.OtherLen, rr.OtherData}
+}
+func (rr *TXT) copy() RR {
+	Txt := make([]string, len(rr.Txt))
+	copy(Txt, rr.Txt)
+	return &TXT{*rr.Hdr.copyHeader(), Txt}
+}
+func (rr *UID) copy() RR {
+	return &UID{*rr.Hdr.copyHeader(), rr.Uid}
+}
+func (rr *UINFO) copy() RR {
+	return &UINFO{*rr.Hdr.copyHeader(), rr.Uinfo}
+}
+func (rr *URI) copy() RR {
+	return &URI{*rr.Hdr.copyHeader(), rr.Priority, rr.Weight, rr.Target}
+}
+func (rr *X25) copy() RR {
+	return &X25{*rr.Hdr.copyHeader(), rr.PSDNAddress}
+}
diff --git a/vendor/golang.org/x/crypto/AUTHORS b/vendor/golang.org/x/crypto/AUTHORS
new file mode 100644
index 0000000..2b00ddb
--- /dev/null
+++ b/vendor/golang.org/x/crypto/AUTHORS
@@ -0,0 +1,3 @@
+# This source code refers to The Go Authors for copyright purposes.
+# The master list of authors is in the main Go distribution,
+# visible at https://tip.golang.org/AUTHORS.
diff --git a/vendor/golang.org/x/crypto/CONTRIBUTORS b/vendor/golang.org/x/crypto/CONTRIBUTORS
new file mode 100644
index 0000000..1fbd3e9
--- /dev/null
+++ b/vendor/golang.org/x/crypto/CONTRIBUTORS
@@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at https://tip.golang.org/CONTRIBUTORS.
diff --git a/vendor/golang.org/x/crypto/LICENSE b/vendor/golang.org/x/crypto/LICENSE
new file mode 100644
index 0000000..6a66aea
--- /dev/null
+++ b/vendor/golang.org/x/crypto/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/golang.org/x/crypto/PATENTS b/vendor/golang.org/x/crypto/PATENTS
new file mode 100644
index 0000000..7330990
--- /dev/null
+++ b/vendor/golang.org/x/crypto/PATENTS
@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.
diff --git a/vendor/golang.org/x/crypto/ed25519/ed25519.go b/vendor/golang.org/x/crypto/ed25519/ed25519.go
new file mode 100644
index 0000000..4f26b49
--- /dev/null
+++ b/vendor/golang.org/x/crypto/ed25519/ed25519.go
@@ -0,0 +1,181 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package ed25519 implements the Ed25519 signature algorithm. See
+// https://ed25519.cr.yp.to/.
+//
+// These functions are also compatible with the “Ed25519” function defined in
+// RFC 8032.
+package ed25519
+
+// This code is a port of the public domain, “ref10” implementation of ed25519
+// from SUPERCOP.
+
+import (
+	"bytes"
+	"crypto"
+	cryptorand "crypto/rand"
+	"crypto/sha512"
+	"errors"
+	"io"
+	"strconv"
+
+	"golang.org/x/crypto/ed25519/internal/edwards25519"
+)
+
+const (
+	// PublicKeySize is the size, in bytes, of public keys as used in this package.
+	PublicKeySize = 32
+	// PrivateKeySize is the size, in bytes, of private keys as used in this package.
+	PrivateKeySize = 64
+	// SignatureSize is the size, in bytes, of signatures generated and verified by this package.
+	SignatureSize = 64
+)
+
+// PublicKey is the type of Ed25519 public keys.
+type PublicKey []byte
+
+// PrivateKey is the type of Ed25519 private keys. It implements crypto.Signer.
+type PrivateKey []byte
+
+// Public returns the PublicKey corresponding to priv.
+func (priv PrivateKey) Public() crypto.PublicKey {
+	publicKey := make([]byte, PublicKeySize)
+	copy(publicKey, priv[32:])
+	return PublicKey(publicKey)
+}
+
+// Sign signs the given message with priv.
+// Ed25519 performs two passes over messages to be signed and therefore cannot
+// handle pre-hashed messages. Thus opts.HashFunc() must return zero to
+// indicate the message hasn't been hashed. This can be achieved by passing
+// crypto.Hash(0) as the value for opts.
+func (priv PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error) {
+	if opts.HashFunc() != crypto.Hash(0) {
+		return nil, errors.New("ed25519: cannot sign hashed message")
+	}
+
+	return Sign(priv, message), nil
+}
+
+// GenerateKey generates a public/private key pair using entropy from rand.
+// If rand is nil, crypto/rand.Reader will be used.
+func GenerateKey(rand io.Reader) (publicKey PublicKey, privateKey PrivateKey, err error) {
+	if rand == nil {
+		rand = cryptorand.Reader
+	}
+
+	privateKey = make([]byte, PrivateKeySize)
+	publicKey = make([]byte, PublicKeySize)
+	_, err = io.ReadFull(rand, privateKey[:32])
+	if err != nil {
+		return nil, nil, err
+	}
+
+	digest := sha512.Sum512(privateKey[:32])
+	digest[0] &= 248
+	digest[31] &= 127
+	digest[31] |= 64
+
+	var A edwards25519.ExtendedGroupElement
+	var hBytes [32]byte
+	copy(hBytes[:], digest[:])
+	edwards25519.GeScalarMultBase(&A, &hBytes)
+	var publicKeyBytes [32]byte
+	A.ToBytes(&publicKeyBytes)
+
+	copy(privateKey[32:], publicKeyBytes[:])
+	copy(publicKey, publicKeyBytes[:])
+
+	return publicKey, privateKey, nil
+}
+
+// Sign signs the message with privateKey and returns a signature. It will
+// panic if len(privateKey) is not PrivateKeySize.
+func Sign(privateKey PrivateKey, message []byte) []byte {
+	if l := len(privateKey); l != PrivateKeySize {
+		panic("ed25519: bad private key length: " + strconv.Itoa(l))
+	}
+
+	h := sha512.New()
+	h.Write(privateKey[:32])
+
+	var digest1, messageDigest, hramDigest [64]byte
+	var expandedSecretKey [32]byte
+	h.Sum(digest1[:0])
+	copy(expandedSecretKey[:], digest1[:])
+	expandedSecretKey[0] &= 248
+	expandedSecretKey[31] &= 63
+	expandedSecretKey[31] |= 64
+
+	h.Reset()
+	h.Write(digest1[32:])
+	h.Write(message)
+	h.Sum(messageDigest[:0])
+
+	var messageDigestReduced [32]byte
+	edwards25519.ScReduce(&messageDigestReduced, &messageDigest)
+	var R edwards25519.ExtendedGroupElement
+	edwards25519.GeScalarMultBase(&R, &messageDigestReduced)
+
+	var encodedR [32]byte
+	R.ToBytes(&encodedR)
+
+	h.Reset()
+	h.Write(encodedR[:])
+	h.Write(privateKey[32:])
+	h.Write(message)
+	h.Sum(hramDigest[:0])
+	var hramDigestReduced [32]byte
+	edwards25519.ScReduce(&hramDigestReduced, &hramDigest)
+
+	var s [32]byte
+	edwards25519.ScMulAdd(&s, &hramDigestReduced, &expandedSecretKey, &messageDigestReduced)
+
+	signature := make([]byte, SignatureSize)
+	copy(signature[:], encodedR[:])
+	copy(signature[32:], s[:])
+
+	return signature
+}
+
+// Verify reports whether sig is a valid signature of message by publicKey. It
+// will panic if len(publicKey) is not PublicKeySize.
+func Verify(publicKey PublicKey, message, sig []byte) bool {
+	if l := len(publicKey); l != PublicKeySize {
+		panic("ed25519: bad public key length: " + strconv.Itoa(l))
+	}
+
+	if len(sig) != SignatureSize || sig[63]&224 != 0 {
+		return false
+	}
+
+	var A edwards25519.ExtendedGroupElement
+	var publicKeyBytes [32]byte
+	copy(publicKeyBytes[:], publicKey)
+	if !A.FromBytes(&publicKeyBytes) {
+		return false
+	}
+	edwards25519.FeNeg(&A.X, &A.X)
+	edwards25519.FeNeg(&A.T, &A.T)
+
+	h := sha512.New()
+	h.Write(sig[:32])
+	h.Write(publicKey[:])
+	h.Write(message)
+	var digest [64]byte
+	h.Sum(digest[:0])
+
+	var hReduced [32]byte
+	edwards25519.ScReduce(&hReduced, &digest)
+
+	var R edwards25519.ProjectiveGroupElement
+	var b [32]byte
+	copy(b[:], sig[32:])
+	edwards25519.GeDoubleScalarMultVartime(&R, &hReduced, &A, &b)
+
+	var checkR [32]byte
+	R.ToBytes(&checkR)
+	return bytes.Equal(sig[:32], checkR[:])
+}
diff --git a/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go b/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go
new file mode 100644
index 0000000..e39f086
--- /dev/null
+++ b/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go
@@ -0,0 +1,1422 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package edwards25519
+
+// These values are from the public domain, “ref10” implementation of ed25519
+// from SUPERCOP.
+
+// d is a constant in the Edwards curve equation.
+var d = FieldElement{
+	-10913610, 13857413, -15372611, 6949391, 114729, -8787816, -6275908, -3247719, -18696448, -12055116,
+}
+
+// d2 is 2*d.
+var d2 = FieldElement{
+	-21827239, -5839606, -30745221, 13898782, 229458, 15978800, -12551817, -6495438, 29715968, 9444199,
+}
+
+// SqrtM1 is the square-root of -1 in the field.
+var SqrtM1 = FieldElement{
+	-32595792, -7943725, 9377950, 3500415, 12389472, -272473, -25146209, -2005654, 326686, 11406482,
+}
+
+// A is a constant in the Montgomery-form of curve25519.
+var A = FieldElement{
+	486662, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+}
+
+// bi contains precomputed multiples of the base-point. See the Ed25519 paper
+// for a discussion about how these values are used.
+var bi = [8]PreComputedGroupElement{
+	{
+		FieldElement{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605},
+		FieldElement{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378},
+		FieldElement{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546},
+	},
+	{
+		FieldElement{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024},
+		FieldElement{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574},
+		FieldElement{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357},
+	},
+	{
+		FieldElement{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380},
+		FieldElement{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306},
+		FieldElement{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942},
+	},
+	{
+		FieldElement{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766},
+		FieldElement{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701},
+		FieldElement{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300},
+	},
+	{
+		FieldElement{-22518993, -6692182, 14201702, -8745502, -23510406, 8844726, 18474211, -1361450, -13062696, 13821877},
+		FieldElement{-6455177, -7839871, 3374702, -4740862, -27098617, -10571707, 31655028, -7212327, 18853322, -14220951},
+		FieldElement{4566830, -12963868, -28974889, -12240689, -7602672, -2830569, -8514358, -10431137, 2207753, -3209784},
+	},
+	{
+		FieldElement{-25154831, -4185821, 29681144, 7868801, -6854661, -9423865, -12437364, -663000, -31111463, -16132436},
+		FieldElement{25576264, -2703214, 7349804, -11814844, 16472782, 9300885, 3844789, 15725684, 171356, 6466918},
+		FieldElement{23103977, 13316479, 9739013, -16149481, 817875, -15038942, 8965339, -14088058, -30714912, 16193877},
+	},
+	{
+		FieldElement{-33521811, 3180713, -2394130, 14003687, -16903474, -16270840, 17238398, 4729455, -18074513, 9256800},
+		FieldElement{-25182317, -4174131, 32336398, 5036987, -21236817, 11360617, 22616405, 9761698, -19827198, 630305},
+		FieldElement{-13720693, 2639453, -24237460, -7406481, 9494427, -5774029, -6554551, -15960994, -2449256, -14291300},
+	},
+	{
+		FieldElement{-3151181, -5046075, 9282714, 6866145, -31907062, -863023, -18940575, 15033784, 25105118, -7894876},
+		FieldElement{-24326370, 15950226, -31801215, -14592823, -11662737, -5090925, 1573892, -2625887, 2198790, -15804619},
+		FieldElement{-3099351, 10324967, -2241613, 7453183, -5446979, -2735503, -13812022, -16236442, -32461234, -12290683},
+	},
+}
+
+// base contains precomputed multiples of the base-point. See the Ed25519 paper
+// for a discussion about how these values are used.
+var base = [32][8]PreComputedGroupElement{
+	{
+		{
+			FieldElement{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605},
+			FieldElement{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378},
+			FieldElement{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546},
+		},
+		{
+			FieldElement{-12815894, -12976347, -21581243, 11784320, -25355658, -2750717, -11717903, -3814571, -358445, -10211303},
+			FieldElement{-21703237, 6903825, 27185491, 6451973, -29577724, -9554005, -15616551, 11189268, -26829678, -5319081},
+			FieldElement{26966642, 11152617, 32442495, 15396054, 14353839, -12752335, -3128826, -9541118, -15472047, -4166697},
+		},
+		{
+			FieldElement{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024},
+			FieldElement{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574},
+			FieldElement{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357},
+		},
+		{
+			FieldElement{-17036878, 13921892, 10945806, -6033431, 27105052, -16084379, -28926210, 15006023, 3284568, -6276540},
+			FieldElement{23599295, -8306047, -11193664, -7687416, 13236774, 10506355, 7464579, 9656445, 13059162, 10374397},
+			FieldElement{7798556, 16710257, 3033922, 2874086, 28997861, 2835604, 32406664, -3839045, -641708, -101325},
+		},
+		{
+			FieldElement{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380},
+			FieldElement{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306},
+			FieldElement{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942},
+		},
+		{
+			FieldElement{-15371964, -12862754, 32573250, 4720197, -26436522, 5875511, -19188627, -15224819, -9818940, -12085777},
+			FieldElement{-8549212, 109983, 15149363, 2178705, 22900618, 4543417, 3044240, -15689887, 1762328, 14866737},
+			FieldElement{-18199695, -15951423, -10473290, 1707278, -17185920, 3916101, -28236412, 3959421, 27914454, 4383652},
+		},
+		{
+			FieldElement{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766},
+			FieldElement{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701},
+			FieldElement{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300},
+		},
+		{
+			FieldElement{14499471, -2729599, -33191113, -4254652, 28494862, 14271267, 30290735, 10876454, -33154098, 2381726},
+			FieldElement{-7195431, -2655363, -14730155, 462251, -27724326, 3941372, -6236617, 3696005, -32300832, 15351955},
+			FieldElement{27431194, 8222322, 16448760, -3907995, -18707002, 11938355, -32961401, -2970515, 29551813, 10109425},
+		},
+	},
+	{
+		{
+			FieldElement{-13657040, -13155431, -31283750, 11777098, 21447386, 6519384, -2378284, -1627556, 10092783, -4764171},
+			FieldElement{27939166, 14210322, 4677035, 16277044, -22964462, -12398139, -32508754, 12005538, -17810127, 12803510},
+			FieldElement{17228999, -15661624, -1233527, 300140, -1224870, -11714777, 30364213, -9038194, 18016357, 4397660},
+		},
+		{
+			FieldElement{-10958843, -7690207, 4776341, -14954238, 27850028, -15602212, -26619106, 14544525, -17477504, 982639},
+			FieldElement{29253598, 15796703, -2863982, -9908884, 10057023, 3163536, 7332899, -4120128, -21047696, 9934963},
+			FieldElement{5793303, 16271923, -24131614, -10116404, 29188560, 1206517, -14747930, 4559895, -30123922, -10897950},
+		},
+		{
+			FieldElement{-27643952, -11493006, 16282657, -11036493, 28414021, -15012264, 24191034, 4541697, -13338309, 5500568},
+			FieldElement{12650548, -1497113, 9052871, 11355358, -17680037, -8400164, -17430592, 12264343, 10874051, 13524335},
+			FieldElement{25556948, -3045990, 714651, 2510400, 23394682, -10415330, 33119038, 5080568, -22528059, 5376628},
+		},
+		{
+			FieldElement{-26088264, -4011052, -17013699, -3537628, -6726793, 1920897, -22321305, -9447443, 4535768, 1569007},
+			FieldElement{-2255422, 14606630, -21692440, -8039818, 28430649, 8775819, -30494562, 3044290, 31848280, 12543772},
+			FieldElement{-22028579, 2943893, -31857513, 6777306, 13784462, -4292203, -27377195, -2062731, 7718482, 14474653},
+		},
+		{
+			FieldElement{2385315, 2454213, -22631320, 46603, -4437935, -15680415, 656965, -7236665, 24316168, -5253567},
+			FieldElement{13741529, 10911568, -33233417, -8603737, -20177830, -1033297, 33040651, -13424532, -20729456, 8321686},
+			FieldElement{21060490, -2212744, 15712757, -4336099, 1639040, 10656336, 23845965, -11874838, -9984458, 608372},
+		},
+		{
+			FieldElement{-13672732, -15087586, -10889693, -7557059, -6036909, 11305547, 1123968, -6780577, 27229399, 23887},
+			FieldElement{-23244140, -294205, -11744728, 14712571, -29465699, -2029617, 12797024, -6440308, -1633405, 16678954},
+			FieldElement{-29500620, 4770662, -16054387, 14001338, 7830047, 9564805, -1508144, -4795045, -17169265, 4904953},
+		},
+		{
+			FieldElement{24059557, 14617003, 19037157, -15039908, 19766093, -14906429, 5169211, 16191880, 2128236, -4326833},
+			FieldElement{-16981152, 4124966, -8540610, -10653797, 30336522, -14105247, -29806336, 916033, -6882542, -2986532},
+			FieldElement{-22630907, 12419372, -7134229, -7473371, -16478904, 16739175, 285431, 2763829, 15736322, 4143876},
+		},
+		{
+			FieldElement{2379352, 11839345, -4110402, -5988665, 11274298, 794957, 212801, -14594663, 23527084, -16458268},
+			FieldElement{33431127, -11130478, -17838966, -15626900, 8909499, 8376530, -32625340, 4087881, -15188911, -14416214},
+			FieldElement{1767683, 7197987, -13205226, -2022635, -13091350, 448826, 5799055, 4357868, -4774191, -16323038},
+		},
+	},
+	{
+		{
+			FieldElement{6721966, 13833823, -23523388, -1551314, 26354293, -11863321, 23365147, -3949732, 7390890, 2759800},
+			FieldElement{4409041, 2052381, 23373853, 10530217, 7676779, -12885954, 21302353, -4264057, 1244380, -12919645},
+			FieldElement{-4421239, 7169619, 4982368, -2957590, 30256825, -2777540, 14086413, 9208236, 15886429, 16489664},
+		},
+		{
+			FieldElement{1996075, 10375649, 14346367, 13311202, -6874135, -16438411, -13693198, 398369, -30606455, -712933},
+			FieldElement{-25307465, 9795880, -2777414, 14878809, -33531835, 14780363, 13348553, 12076947, -30836462, 5113182},
+			FieldElement{-17770784, 11797796, 31950843, 13929123, -25888302, 12288344, -30341101, -7336386, 13847711, 5387222},
+		},
+		{
+			FieldElement{-18582163, -3416217, 17824843, -2340966, 22744343, -10442611, 8763061, 3617786, -19600662, 10370991},
+			FieldElement{20246567, -14369378, 22358229, -543712, 18507283, -10413996, 14554437, -8746092, 32232924, 16763880},
+			FieldElement{9648505, 10094563, 26416693, 14745928, -30374318, -6472621, 11094161, 15689506, 3140038, -16510092},
+		},
+		{
+			FieldElement{-16160072, 5472695, 31895588, 4744994, 8823515, 10365685, -27224800, 9448613, -28774454, 366295},
+			FieldElement{19153450, 11523972, -11096490, -6503142, -24647631, 5420647, 28344573, 8041113, 719605, 11671788},
+			FieldElement{8678025, 2694440, -6808014, 2517372, 4964326, 11152271, -15432916, -15266516, 27000813, -10195553},
+		},
+		{
+			FieldElement{-15157904, 7134312, 8639287, -2814877, -7235688, 10421742, 564065, 5336097, 6750977, -14521026},
+			FieldElement{11836410, -3979488, 26297894, 16080799, 23455045, 15735944, 1695823, -8819122, 8169720, 16220347},
+			FieldElement{-18115838, 8653647, 17578566, -6092619, -8025777, -16012763, -11144307, -2627664, -5990708, -14166033},
+		},
+		{
+			FieldElement{-23308498, -10968312, 15213228, -10081214, -30853605, -11050004, 27884329, 2847284, 2655861, 1738395},
+			FieldElement{-27537433, -14253021, -25336301, -8002780, -9370762, 8129821, 21651608, -3239336, -19087449, -11005278},
+			FieldElement{1533110, 3437855, 23735889, 459276, 29970501, 11335377, 26030092, 5821408, 10478196, 8544890},
+		},
+		{
+			FieldElement{32173121, -16129311, 24896207, 3921497, 22579056, -3410854, 19270449, 12217473, 17789017, -3395995},
+			FieldElement{-30552961, -2228401, -15578829, -10147201, 13243889, 517024, 15479401, -3853233, 30460520, 1052596},
+			FieldElement{-11614875, 13323618, 32618793, 8175907, -15230173, 12596687, 27491595, -4612359, 3179268, -9478891},
+		},
+		{
+			FieldElement{31947069, -14366651, -4640583, -15339921, -15125977, -6039709, -14756777, -16411740, 19072640, -9511060},
+			FieldElement{11685058, 11822410, 3158003, -13952594, 33402194, -4165066, 5977896, -5215017, 473099, 5040608},
+			FieldElement{-20290863, 8198642, -27410132, 11602123, 1290375, -2799760, 28326862, 1721092, -19558642, -3131606},
+		},
+	},
+	{
+		{
+			FieldElement{7881532, 10687937, 7578723, 7738378, -18951012, -2553952, 21820786, 8076149, -27868496, 11538389},
+			FieldElement{-19935666, 3899861, 18283497, -6801568, -15728660, -11249211, 8754525, 7446702, -5676054, 5797016},
+			FieldElement{-11295600, -3793569, -15782110, -7964573, 12708869, -8456199, 2014099, -9050574, -2369172, -5877341},
+		},
+		{
+			FieldElement{-22472376, -11568741, -27682020, 1146375, 18956691, 16640559, 1192730, -3714199, 15123619, 10811505},
+			FieldElement{14352098, -3419715, -18942044, 10822655, 32750596, 4699007, -70363, 15776356, -28886779, -11974553},
+			FieldElement{-28241164, -8072475, -4978962, -5315317, 29416931, 1847569, -20654173, -16484855, 4714547, -9600655},
+		},
+		{
+			FieldElement{15200332, 8368572, 19679101, 15970074, -31872674, 1959451, 24611599, -4543832, -11745876, 12340220},
+			FieldElement{12876937, -10480056, 33134381, 6590940, -6307776, 14872440, 9613953, 8241152, 15370987, 9608631},
+			FieldElement{-4143277, -12014408, 8446281, -391603, 4407738, 13629032, -7724868, 15866074, -28210621, -8814099},
+		},
+		{
+			FieldElement{26660628, -15677655, 8393734, 358047, -7401291, 992988, -23904233, 858697, 20571223, 8420556},
+			FieldElement{14620715, 13067227, -15447274, 8264467, 14106269, 15080814, 33531827, 12516406, -21574435, -12476749},
+			FieldElement{236881, 10476226, 57258, -14677024, 6472998, 2466984, 17258519, 7256740, 8791136, 15069930},
+		},
+		{
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+		{
+			FieldElement{17597607, 8340603, 19355617, 552187, 26198470, -3176583, 4593324, -9157582, -14110875, 15297016},
+			FieldElement{510886, 14337390, -31785257, 16638632, 6328095, 2713355, -20217417, -11864220, 8683221, 2921426},
+			FieldElement{18606791, 11874196, 27155355, -5281482, -24031742, 6265446, -25178240, -1278924, 4674690, 13890525},
+		},
+		{
+			FieldElement{13609624, 13069022, -27372361, -13055908, 24360586, 9592974, 14977157, 9835105, 4389687, 288396},
+			FieldElement{9922506, -519394, 13613107, 5883594, -18758345, -434263, -12304062, 8317628, 23388070, 16052080},
+			FieldElement{12720016, 11937594, -31970060, -5028689, 26900120, 8561328, -20155687, -11632979, -14754271, -10812892},
+		},
+		{
+			FieldElement{15961858, 14150409, 26716931, -665832, -22794328, 13603569, 11829573, 7467844, -28822128, 929275},
+			FieldElement{11038231, -11582396, -27310482, -7316562, -10498527, -16307831, -23479533, -9371869, -21393143, 2465074},
+			FieldElement{20017163, -4323226, 27915242, 1529148, 12396362, 15675764, 13817261, -9658066, 2463391, -4622140},
+		},
+		{
+			FieldElement{-16358878, -12663911, -12065183, 4996454, -1256422, 1073572, 9583558, 12851107, 4003896, 12673717},
+			FieldElement{-1731589, -15155870, -3262930, 16143082, 19294135, 13385325, 14741514, -9103726, 7903886, 2348101},
+			FieldElement{24536016, -16515207, 12715592, -3862155, 1511293, 10047386, -3842346, -7129159, -28377538, 10048127},
+		},
+	},
+	{
+		{
+			FieldElement{-12622226, -6204820, 30718825, 2591312, -10617028, 12192840, 18873298, -7297090, -32297756, 15221632},
+			FieldElement{-26478122, -11103864, 11546244, -1852483, 9180880, 7656409, -21343950, 2095755, 29769758, 6593415},
+			FieldElement{-31994208, -2907461, 4176912, 3264766, 12538965, -868111, 26312345, -6118678, 30958054, 8292160},
+		},
+		{
+			FieldElement{31429822, -13959116, 29173532, 15632448, 12174511, -2760094, 32808831, 3977186, 26143136, -3148876},
+			FieldElement{22648901, 1402143, -22799984, 13746059, 7936347, 365344, -8668633, -1674433, -3758243, -2304625},
+			FieldElement{-15491917, 8012313, -2514730, -12702462, -23965846, -10254029, -1612713, -1535569, -16664475, 8194478},
+		},
+		{
+			FieldElement{27338066, -7507420, -7414224, 10140405, -19026427, -6589889, 27277191, 8855376, 28572286, 3005164},
+			FieldElement{26287124, 4821776, 25476601, -4145903, -3764513, -15788984, -18008582, 1182479, -26094821, -13079595},
+			FieldElement{-7171154, 3178080, 23970071, 6201893, -17195577, -4489192, -21876275, -13982627, 32208683, -1198248},
+		},
+		{
+			FieldElement{-16657702, 2817643, -10286362, 14811298, 6024667, 13349505, -27315504, -10497842, -27672585, -11539858},
+			FieldElement{15941029, -9405932, -21367050, 8062055, 31876073, -238629, -15278393, -1444429, 15397331, -4130193},
+			FieldElement{8934485, -13485467, -23286397, -13423241, -32446090, 14047986, 31170398, -1441021, -27505566, 15087184},
+		},
+		{
+			FieldElement{-18357243, -2156491, 24524913, -16677868, 15520427, -6360776, -15502406, 11461896, 16788528, -5868942},
+			FieldElement{-1947386, 16013773, 21750665, 3714552, -17401782, -16055433, -3770287, -10323320, 31322514, -11615635},
+			FieldElement{21426655, -5650218, -13648287, -5347537, -28812189, -4920970, -18275391, -14621414, 13040862, -12112948},
+		},
+		{
+			FieldElement{11293895, 12478086, -27136401, 15083750, -29307421, 14748872, 14555558, -13417103, 1613711, 4896935},
+			FieldElement{-25894883, 15323294, -8489791, -8057900, 25967126, -13425460, 2825960, -4897045, -23971776, -11267415},
+			FieldElement{-15924766, -5229880, -17443532, 6410664, 3622847, 10243618, 20615400, 12405433, -23753030, -8436416},
+		},
+		{
+			FieldElement{-7091295, 12556208, -20191352, 9025187, -17072479, 4333801, 4378436, 2432030, 23097949, -566018},
+			FieldElement{4565804, -16025654, 20084412, -7842817, 1724999, 189254, 24767264, 10103221, -18512313, 2424778},
+			FieldElement{366633, -11976806, 8173090, -6890119, 30788634, 5745705, -7168678, 1344109, -3642553, 12412659},
+		},
+		{
+			FieldElement{-24001791, 7690286, 14929416, -168257, -32210835, -13412986, 24162697, -15326504, -3141501, 11179385},
+			FieldElement{18289522, -14724954, 8056945, 16430056, -21729724, 7842514, -6001441, -1486897, -18684645, -11443503},
+			FieldElement{476239, 6601091, -6152790, -9723375, 17503545, -4863900, 27672959, 13403813, 11052904, 5219329},
+		},
+	},
+	{
+		{
+			FieldElement{20678546, -8375738, -32671898, 8849123, -5009758, 14574752, 31186971, -3973730, 9014762, -8579056},
+			FieldElement{-13644050, -10350239, -15962508, 5075808, -1514661, -11534600, -33102500, 9160280, 8473550, -3256838},
+			FieldElement{24900749, 14435722, 17209120, -15292541, -22592275, 9878983, -7689309, -16335821, -24568481, 11788948},
+		},
+		{
+			FieldElement{-3118155, -11395194, -13802089, 14797441, 9652448, -6845904, -20037437, 10410733, -24568470, -1458691},
+			FieldElement{-15659161, 16736706, -22467150, 10215878, -9097177, 7563911, 11871841, -12505194, -18513325, 8464118},
+			FieldElement{-23400612, 8348507, -14585951, -861714, -3950205, -6373419, 14325289, 8628612, 33313881, -8370517},
+		},
+		{
+			FieldElement{-20186973, -4967935, 22367356, 5271547, -1097117, -4788838, -24805667, -10236854, -8940735, -5818269},
+			FieldElement{-6948785, -1795212, -32625683, -16021179, 32635414, -7374245, 15989197, -12838188, 28358192, -4253904},
+			FieldElement{-23561781, -2799059, -32351682, -1661963, -9147719, 10429267, -16637684, 4072016, -5351664, 5596589},
+		},
+		{
+			FieldElement{-28236598, -3390048, 12312896, 6213178, 3117142, 16078565, 29266239, 2557221, 1768301, 15373193},
+			FieldElement{-7243358, -3246960, -4593467, -7553353, -127927, -912245, -1090902, -4504991, -24660491, 3442910},
+			FieldElement{-30210571, 5124043, 14181784, 8197961, 18964734, -11939093, 22597931, 7176455, -18585478, 13365930},
+		},
+		{
+			FieldElement{-7877390, -1499958, 8324673, 4690079, 6261860, 890446, 24538107, -8570186, -9689599, -3031667},
+			FieldElement{25008904, -10771599, -4305031, -9638010, 16265036, 15721635, 683793, -11823784, 15723479, -15163481},
+			FieldElement{-9660625, 12374379, -27006999, -7026148, -7724114, -12314514, 11879682, 5400171, 519526, -1235876},
+		},
+		{
+			FieldElement{22258397, -16332233, -7869817, 14613016, -22520255, -2950923, -20353881, 7315967, 16648397, 7605640},
+			FieldElement{-8081308, -8464597, -8223311, 9719710, 19259459, -15348212, 23994942, -5281555, -9468848, 4763278},
+			FieldElement{-21699244, 9220969, -15730624, 1084137, -25476107, -2852390, 31088447, -7764523, -11356529, 728112},
+		},
+		{
+			FieldElement{26047220, -11751471, -6900323, -16521798, 24092068, 9158119, -4273545, -12555558, -29365436, -5498272},
+			FieldElement{17510331, -322857, 5854289, 8403524, 17133918, -3112612, -28111007, 12327945, 10750447, 10014012},
+			FieldElement{-10312768, 3936952, 9156313, -8897683, 16498692, -994647, -27481051, -666732, 3424691, 7540221},
+		},
+		{
+			FieldElement{30322361, -6964110, 11361005, -4143317, 7433304, 4989748, -7071422, -16317219, -9244265, 15258046},
+			FieldElement{13054562, -2779497, 19155474, 469045, -12482797, 4566042, 5631406, 2711395, 1062915, -5136345},
+			FieldElement{-19240248, -11254599, -29509029, -7499965, -5835763, 13005411, -6066489, 12194497, 32960380, 1459310},
+		},
+	},
+	{
+		{
+			FieldElement{19852034, 7027924, 23669353, 10020366, 8586503, -6657907, 394197, -6101885, 18638003, -11174937},
+			FieldElement{31395534, 15098109, 26581030, 8030562, -16527914, -5007134, 9012486, -7584354, -6643087, -5442636},
+			FieldElement{-9192165, -2347377, -1997099, 4529534, 25766844, 607986, -13222, 9677543, -32294889, -6456008},
+		},
+		{
+			FieldElement{-2444496, -149937, 29348902, 8186665, 1873760, 12489863, -30934579, -7839692, -7852844, -8138429},
+			FieldElement{-15236356, -15433509, 7766470, 746860, 26346930, -10221762, -27333451, 10754588, -9431476, 5203576},
+			FieldElement{31834314, 14135496, -770007, 5159118, 20917671, -16768096, -7467973, -7337524, 31809243, 7347066},
+		},
+		{
+			FieldElement{-9606723, -11874240, 20414459, 13033986, 13716524, -11691881, 19797970, -12211255, 15192876, -2087490},
+			FieldElement{-12663563, -2181719, 1168162, -3804809, 26747877, -14138091, 10609330, 12694420, 33473243, -13382104},
+			FieldElement{33184999, 11180355, 15832085, -11385430, -1633671, 225884, 15089336, -11023903, -6135662, 14480053},
+		},
+		{
+			FieldElement{31308717, -5619998, 31030840, -1897099, 15674547, -6582883, 5496208, 13685227, 27595050, 8737275},
+			FieldElement{-20318852, -15150239, 10933843, -16178022, 8335352, -7546022, -31008351, -12610604, 26498114, 66511},
+			FieldElement{22644454, -8761729, -16671776, 4884562, -3105614, -13559366, 30540766, -4286747, -13327787, -7515095},
+		},
+		{
+			FieldElement{-28017847, 9834845, 18617207, -2681312, -3401956, -13307506, 8205540, 13585437, -17127465, 15115439},
+			FieldElement{23711543, -672915, 31206561, -8362711, 6164647, -9709987, -33535882, -1426096, 8236921, 16492939},
+			FieldElement{-23910559, -13515526, -26299483, -4503841, 25005590, -7687270, 19574902, 10071562, 6708380, -6222424},
+		},
+		{
+			FieldElement{2101391, -4930054, 19702731, 2367575, -15427167, 1047675, 5301017, 9328700, 29955601, -11678310},
+			FieldElement{3096359, 9271816, -21620864, -15521844, -14847996, -7592937, -25892142, -12635595, -9917575, 6216608},
+			FieldElement{-32615849, 338663, -25195611, 2510422, -29213566, -13820213, 24822830, -6146567, -26767480, 7525079},
+		},
+		{
+			FieldElement{-23066649, -13985623, 16133487, -7896178, -3389565, 778788, -910336, -2782495, -19386633, 11994101},
+			FieldElement{21691500, -13624626, -641331, -14367021, 3285881, -3483596, -25064666, 9718258, -7477437, 13381418},
+			FieldElement{18445390, -4202236, 14979846, 11622458, -1727110, -3582980, 23111648, -6375247, 28535282, 15779576},
+		},
+		{
+			FieldElement{30098053, 3089662, -9234387, 16662135, -21306940, 11308411, -14068454, 12021730, 9955285, -16303356},
+			FieldElement{9734894, -14576830, -7473633, -9138735, 2060392, 11313496, -18426029, 9924399, 20194861, 13380996},
+			FieldElement{-26378102, -7965207, -22167821, 15789297, -18055342, -6168792, -1984914, 15707771, 26342023, 10146099},
+		},
+	},
+	{
+		{
+			FieldElement{-26016874, -219943, 21339191, -41388, 19745256, -2878700, -29637280, 2227040, 21612326, -545728},
+			FieldElement{-13077387, 1184228, 23562814, -5970442, -20351244, -6348714, 25764461, 12243797, -20856566, 11649658},
+			FieldElement{-10031494, 11262626, 27384172, 2271902, 26947504, -15997771, 39944, 6114064, 33514190, 2333242},
+		},
+		{
+			FieldElement{-21433588, -12421821, 8119782, 7219913, -21830522, -9016134, -6679750, -12670638, 24350578, -13450001},
+			FieldElement{-4116307, -11271533, -23886186, 4843615, -30088339, 690623, -31536088, -10406836, 8317860, 12352766},
+			FieldElement{18200138, -14475911, -33087759, -2696619, -23702521, -9102511, -23552096, -2287550, 20712163, 6719373},
+		},
+		{
+			FieldElement{26656208, 6075253, -7858556, 1886072, -28344043, 4262326, 11117530, -3763210, 26224235, -3297458},
+			FieldElement{-17168938, -14854097, -3395676, -16369877, -19954045, 14050420, 21728352, 9493610, 18620611, -16428628},
+			FieldElement{-13323321, 13325349, 11432106, 5964811, 18609221, 6062965, -5269471, -9725556, -30701573, -16479657},
+		},
+		{
+			FieldElement{-23860538, -11233159, 26961357, 1640861, -32413112, -16737940, 12248509, -5240639, 13735342, 1934062},
+			FieldElement{25089769, 6742589, 17081145, -13406266, 21909293, -16067981, -15136294, -3765346, -21277997, 5473616},
+			FieldElement{31883677, -7961101, 1083432, -11572403, 22828471, 13290673, -7125085, 12469656, 29111212, -5451014},
+		},
+		{
+			FieldElement{24244947, -15050407, -26262976, 2791540, -14997599, 16666678, 24367466, 6388839, -10295587, 452383},
+			FieldElement{-25640782, -3417841, 5217916, 16224624, 19987036, -4082269, -24236251, -5915248, 15766062, 8407814},
+			FieldElement{-20406999, 13990231, 15495425, 16395525, 5377168, 15166495, -8917023, -4388953, -8067909, 2276718},
+		},
+		{
+			FieldElement{30157918, 12924066, -17712050, 9245753, 19895028, 3368142, -23827587, 5096219, 22740376, -7303417},
+			FieldElement{2041139, -14256350, 7783687, 13876377, -25946985, -13352459, 24051124, 13742383, -15637599, 13295222},
+			FieldElement{33338237, -8505733, 12532113, 7977527, 9106186, -1715251, -17720195, -4612972, -4451357, -14669444},
+		},
+		{
+			FieldElement{-20045281, 5454097, -14346548, 6447146, 28862071, 1883651, -2469266, -4141880, 7770569, 9620597},
+			FieldElement{23208068, 7979712, 33071466, 8149229, 1758231, -10834995, 30945528, -1694323, -33502340, -14767970},
+			FieldElement{1439958, -16270480, -1079989, -793782, 4625402, 10647766, -5043801, 1220118, 30494170, -11440799},
+		},
+		{
+			FieldElement{-5037580, -13028295, -2970559, -3061767, 15640974, -6701666, -26739026, 926050, -1684339, -13333647},
+			FieldElement{13908495, -3549272, 30919928, -6273825, -21521863, 7989039, 9021034, 9078865, 3353509, 4033511},
+			FieldElement{-29663431, -15113610, 32259991, -344482, 24295849, -12912123, 23161163, 8839127, 27485041, 7356032},
+		},
+	},
+	{
+		{
+			FieldElement{9661027, 705443, 11980065, -5370154, -1628543, 14661173, -6346142, 2625015, 28431036, -16771834},
+			FieldElement{-23839233, -8311415, -25945511, 7480958, -17681669, -8354183, -22545972, 14150565, 15970762, 4099461},
+			FieldElement{29262576, 16756590, 26350592, -8793563, 8529671, -11208050, 13617293, -9937143, 11465739, 8317062},
+		},
+		{
+			FieldElement{-25493081, -6962928, 32500200, -9419051, -23038724, -2302222, 14898637, 3848455, 20969334, -5157516},
+			FieldElement{-20384450, -14347713, -18336405, 13884722, -33039454, 2842114, -21610826, -3649888, 11177095, 14989547},
+			FieldElement{-24496721, -11716016, 16959896, 2278463, 12066309, 10137771, 13515641, 2581286, -28487508, 9930240},
+		},
+		{
+			FieldElement{-17751622, -2097826, 16544300, -13009300, -15914807, -14949081, 18345767, -13403753, 16291481, -5314038},
+			FieldElement{-33229194, 2553288, 32678213, 9875984, 8534129, 6889387, -9676774, 6957617, 4368891, 9788741},
+			FieldElement{16660756, 7281060, -10830758, 12911820, 20108584, -8101676, -21722536, -8613148, 16250552, -11111103},
+		},
+		{
+			FieldElement{-19765507, 2390526, -16551031, 14161980, 1905286, 6414907, 4689584, 10604807, -30190403, 4782747},
+			FieldElement{-1354539, 14736941, -7367442, -13292886, 7710542, -14155590, -9981571, 4383045, 22546403, 437323},
+			FieldElement{31665577, -12180464, -16186830, 1491339, -18368625, 3294682, 27343084, 2786261, -30633590, -14097016},
+		},
+		{
+			FieldElement{-14467279, -683715, -33374107, 7448552, 19294360, 14334329, -19690631, 2355319, -19284671, -6114373},
+			FieldElement{15121312, -15796162, 6377020, -6031361, -10798111, -12957845, 18952177, 15496498, -29380133, 11754228},
+			FieldElement{-2637277, -13483075, 8488727, -14303896, 12728761, -1622493, 7141596, 11724556, 22761615, -10134141},
+		},
+		{
+			FieldElement{16918416, 11729663, -18083579, 3022987, -31015732, -13339659, -28741185, -12227393, 32851222, 11717399},
+			FieldElement{11166634, 7338049, -6722523, 4531520, -29468672, -7302055, 31474879, 3483633, -1193175, -4030831},
+			FieldElement{-185635, 9921305, 31456609, -13536438, -12013818, 13348923, 33142652, 6546660, -19985279, -3948376},
+		},
+		{
+			FieldElement{-32460596, 11266712, -11197107, -7899103, 31703694, 3855903, -8537131, -12833048, -30772034, -15486313},
+			FieldElement{-18006477, 12709068, 3991746, -6479188, -21491523, -10550425, -31135347, -16049879, 10928917, 3011958},
+			FieldElement{-6957757, -15594337, 31696059, 334240, 29576716, 14796075, -30831056, -12805180, 18008031, 10258577},
+		},
+		{
+			FieldElement{-22448644, 15655569, 7018479, -4410003, -30314266, -1201591, -1853465, 1367120, 25127874, 6671743},
+			FieldElement{29701166, -14373934, -10878120, 9279288, -17568, 13127210, 21382910, 11042292, 25838796, 4642684},
+			FieldElement{-20430234, 14955537, -24126347, 8124619, -5369288, -5990470, 30468147, -13900640, 18423289, 4177476},
+		},
+	},
+}
diff --git a/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go b/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go
new file mode 100644
index 0000000..5f8b994
--- /dev/null
+++ b/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go
@@ -0,0 +1,1771 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package edwards25519
+
+// This code is a port of the public domain, “ref10” implementation of ed25519
+// from SUPERCOP.
+
+// FieldElement represents an element of the field GF(2^255 - 19).  An element
+// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77
+// t[3]+2^102 t[4]+...+2^230 t[9].  Bounds on each t[i] vary depending on
+// context.
+type FieldElement [10]int32
+
+var zero FieldElement
+
+func FeZero(fe *FieldElement) {
+	copy(fe[:], zero[:])
+}
+
+func FeOne(fe *FieldElement) {
+	FeZero(fe)
+	fe[0] = 1
+}
+
+func FeAdd(dst, a, b *FieldElement) {
+	dst[0] = a[0] + b[0]
+	dst[1] = a[1] + b[1]
+	dst[2] = a[2] + b[2]
+	dst[3] = a[3] + b[3]
+	dst[4] = a[4] + b[4]
+	dst[5] = a[5] + b[5]
+	dst[6] = a[6] + b[6]
+	dst[7] = a[7] + b[7]
+	dst[8] = a[8] + b[8]
+	dst[9] = a[9] + b[9]
+}
+
+func FeSub(dst, a, b *FieldElement) {
+	dst[0] = a[0] - b[0]
+	dst[1] = a[1] - b[1]
+	dst[2] = a[2] - b[2]
+	dst[3] = a[3] - b[3]
+	dst[4] = a[4] - b[4]
+	dst[5] = a[5] - b[5]
+	dst[6] = a[6] - b[6]
+	dst[7] = a[7] - b[7]
+	dst[8] = a[8] - b[8]
+	dst[9] = a[9] - b[9]
+}
+
+func FeCopy(dst, src *FieldElement) {
+	copy(dst[:], src[:])
+}
+
+// Replace (f,g) with (g,g) if b == 1;
+// replace (f,g) with (f,g) if b == 0.
+//
+// Preconditions: b in {0,1}.
+func FeCMove(f, g *FieldElement, b int32) {
+	b = -b
+	f[0] ^= b & (f[0] ^ g[0])
+	f[1] ^= b & (f[1] ^ g[1])
+	f[2] ^= b & (f[2] ^ g[2])
+	f[3] ^= b & (f[3] ^ g[3])
+	f[4] ^= b & (f[4] ^ g[4])
+	f[5] ^= b & (f[5] ^ g[5])
+	f[6] ^= b & (f[6] ^ g[6])
+	f[7] ^= b & (f[7] ^ g[7])
+	f[8] ^= b & (f[8] ^ g[8])
+	f[9] ^= b & (f[9] ^ g[9])
+}
+
+func load3(in []byte) int64 {
+	var r int64
+	r = int64(in[0])
+	r |= int64(in[1]) << 8
+	r |= int64(in[2]) << 16
+	return r
+}
+
+func load4(in []byte) int64 {
+	var r int64
+	r = int64(in[0])
+	r |= int64(in[1]) << 8
+	r |= int64(in[2]) << 16
+	r |= int64(in[3]) << 24
+	return r
+}
+
+func FeFromBytes(dst *FieldElement, src *[32]byte) {
+	h0 := load4(src[:])
+	h1 := load3(src[4:]) << 6
+	h2 := load3(src[7:]) << 5
+	h3 := load3(src[10:]) << 3
+	h4 := load3(src[13:]) << 2
+	h5 := load4(src[16:])
+	h6 := load3(src[20:]) << 7
+	h7 := load3(src[23:]) << 5
+	h8 := load3(src[26:]) << 4
+	h9 := (load3(src[29:]) & 8388607) << 2
+
+	FeCombine(dst, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9)
+}
+
+// FeToBytes marshals h to s.
+// Preconditions:
+//   |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
+//
+// Write p=2^255-19; q=floor(h/p).
+// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))).
+//
+// Proof:
+//   Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4.
+//   Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4.
+//
+//   Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9).
+//   Then 0<y<1.
+//
+//   Write r=h-pq.
+//   Have 0<=r<=p-1=2^255-20.
+//   Thus 0<=r+19(2^-255)r<r+19(2^-255)2^255<=2^255-1.
+//
+//   Write x=r+19(2^-255)r+y.
+//   Then 0<x<2^255 so floor(2^(-255)x) = 0 so floor(q+2^(-255)x) = q.
+//
+//   Have q+2^(-255)x = 2^(-255)(h + 19 2^(-25) h9 + 2^(-1))
+//   so floor(2^(-255)(h + 19 2^(-25) h9 + 2^(-1))) = q.
+func FeToBytes(s *[32]byte, h *FieldElement) {
+	var carry [10]int32
+
+	q := (19*h[9] + (1 << 24)) >> 25
+	q = (h[0] + q) >> 26
+	q = (h[1] + q) >> 25
+	q = (h[2] + q) >> 26
+	q = (h[3] + q) >> 25
+	q = (h[4] + q) >> 26
+	q = (h[5] + q) >> 25
+	q = (h[6] + q) >> 26
+	q = (h[7] + q) >> 25
+	q = (h[8] + q) >> 26
+	q = (h[9] + q) >> 25
+
+	// Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20.
+	h[0] += 19 * q
+	// Goal: Output h-2^255 q, which is between 0 and 2^255-20.
+
+	carry[0] = h[0] >> 26
+	h[1] += carry[0]
+	h[0] -= carry[0] << 26
+	carry[1] = h[1] >> 25
+	h[2] += carry[1]
+	h[1] -= carry[1] << 25
+	carry[2] = h[2] >> 26
+	h[3] += carry[2]
+	h[2] -= carry[2] << 26
+	carry[3] = h[3] >> 25
+	h[4] += carry[3]
+	h[3] -= carry[3] << 25
+	carry[4] = h[4] >> 26
+	h[5] += carry[4]
+	h[4] -= carry[4] << 26
+	carry[5] = h[5] >> 25
+	h[6] += carry[5]
+	h[5] -= carry[5] << 25
+	carry[6] = h[6] >> 26
+	h[7] += carry[6]
+	h[6] -= carry[6] << 26
+	carry[7] = h[7] >> 25
+	h[8] += carry[7]
+	h[7] -= carry[7] << 25
+	carry[8] = h[8] >> 26
+	h[9] += carry[8]
+	h[8] -= carry[8] << 26
+	carry[9] = h[9] >> 25
+	h[9] -= carry[9] << 25
+	// h10 = carry9
+
+	// Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20.
+	// Have h[0]+...+2^230 h[9] between 0 and 2^255-1;
+	// evidently 2^255 h10-2^255 q = 0.
+	// Goal: Output h[0]+...+2^230 h[9].
+
+	s[0] = byte(h[0] >> 0)
+	s[1] = byte(h[0] >> 8)
+	s[2] = byte(h[0] >> 16)
+	s[3] = byte((h[0] >> 24) | (h[1] << 2))
+	s[4] = byte(h[1] >> 6)
+	s[5] = byte(h[1] >> 14)
+	s[6] = byte((h[1] >> 22) | (h[2] << 3))
+	s[7] = byte(h[2] >> 5)
+	s[8] = byte(h[2] >> 13)
+	s[9] = byte((h[2] >> 21) | (h[3] << 5))
+	s[10] = byte(h[3] >> 3)
+	s[11] = byte(h[3] >> 11)
+	s[12] = byte((h[3] >> 19) | (h[4] << 6))
+	s[13] = byte(h[4] >> 2)
+	s[14] = byte(h[4] >> 10)
+	s[15] = byte(h[4] >> 18)
+	s[16] = byte(h[5] >> 0)
+	s[17] = byte(h[5] >> 8)
+	s[18] = byte(h[5] >> 16)
+	s[19] = byte((h[5] >> 24) | (h[6] << 1))
+	s[20] = byte(h[6] >> 7)
+	s[21] = byte(h[6] >> 15)
+	s[22] = byte((h[6] >> 23) | (h[7] << 3))
+	s[23] = byte(h[7] >> 5)
+	s[24] = byte(h[7] >> 13)
+	s[25] = byte((h[7] >> 21) | (h[8] << 4))
+	s[26] = byte(h[8] >> 4)
+	s[27] = byte(h[8] >> 12)
+	s[28] = byte((h[8] >> 20) | (h[9] << 6))
+	s[29] = byte(h[9] >> 2)
+	s[30] = byte(h[9] >> 10)
+	s[31] = byte(h[9] >> 18)
+}
+
+func FeIsNegative(f *FieldElement) byte {
+	var s [32]byte
+	FeToBytes(&s, f)
+	return s[0] & 1
+}
+
+func FeIsNonZero(f *FieldElement) int32 {
+	var s [32]byte
+	FeToBytes(&s, f)
+	var x uint8
+	for _, b := range s {
+		x |= b
+	}
+	x |= x >> 4
+	x |= x >> 2
+	x |= x >> 1
+	return int32(x & 1)
+}
+
+// FeNeg sets h = -f
+//
+// Preconditions:
+//    |f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
+//
+// Postconditions:
+//    |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
+func FeNeg(h, f *FieldElement) {
+	h[0] = -f[0]
+	h[1] = -f[1]
+	h[2] = -f[2]
+	h[3] = -f[3]
+	h[4] = -f[4]
+	h[5] = -f[5]
+	h[6] = -f[6]
+	h[7] = -f[7]
+	h[8] = -f[8]
+	h[9] = -f[9]
+}
+
+func FeCombine(h *FieldElement, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 int64) {
+	var c0, c1, c2, c3, c4, c5, c6, c7, c8, c9 int64
+
+	/*
+	  |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38))
+	    i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8
+	  |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19))
+	    i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9
+	*/
+
+	c0 = (h0 + (1 << 25)) >> 26
+	h1 += c0
+	h0 -= c0 << 26
+	c4 = (h4 + (1 << 25)) >> 26
+	h5 += c4
+	h4 -= c4 << 26
+	/* |h0| <= 2^25 */
+	/* |h4| <= 2^25 */
+	/* |h1| <= 1.51*2^58 */
+	/* |h5| <= 1.51*2^58 */
+
+	c1 = (h1 + (1 << 24)) >> 25
+	h2 += c1
+	h1 -= c1 << 25
+	c5 = (h5 + (1 << 24)) >> 25
+	h6 += c5
+	h5 -= c5 << 25
+	/* |h1| <= 2^24; from now on fits into int32 */
+	/* |h5| <= 2^24; from now on fits into int32 */
+	/* |h2| <= 1.21*2^59 */
+	/* |h6| <= 1.21*2^59 */
+
+	c2 = (h2 + (1 << 25)) >> 26
+	h3 += c2
+	h2 -= c2 << 26
+	c6 = (h6 + (1 << 25)) >> 26
+	h7 += c6
+	h6 -= c6 << 26
+	/* |h2| <= 2^25; from now on fits into int32 unchanged */
+	/* |h6| <= 2^25; from now on fits into int32 unchanged */
+	/* |h3| <= 1.51*2^58 */
+	/* |h7| <= 1.51*2^58 */
+
+	c3 = (h3 + (1 << 24)) >> 25
+	h4 += c3
+	h3 -= c3 << 25
+	c7 = (h7 + (1 << 24)) >> 25
+	h8 += c7
+	h7 -= c7 << 25
+	/* |h3| <= 2^24; from now on fits into int32 unchanged */
+	/* |h7| <= 2^24; from now on fits into int32 unchanged */
+	/* |h4| <= 1.52*2^33 */
+	/* |h8| <= 1.52*2^33 */
+
+	c4 = (h4 + (1 << 25)) >> 26
+	h5 += c4
+	h4 -= c4 << 26
+	c8 = (h8 + (1 << 25)) >> 26
+	h9 += c8
+	h8 -= c8 << 26
+	/* |h4| <= 2^25; from now on fits into int32 unchanged */
+	/* |h8| <= 2^25; from now on fits into int32 unchanged */
+	/* |h5| <= 1.01*2^24 */
+	/* |h9| <= 1.51*2^58 */
+
+	c9 = (h9 + (1 << 24)) >> 25
+	h0 += c9 * 19
+	h9 -= c9 << 25
+	/* |h9| <= 2^24; from now on fits into int32 unchanged */
+	/* |h0| <= 1.8*2^37 */
+
+	c0 = (h0 + (1 << 25)) >> 26
+	h1 += c0
+	h0 -= c0 << 26
+	/* |h0| <= 2^25; from now on fits into int32 unchanged */
+	/* |h1| <= 1.01*2^24 */
+
+	h[0] = int32(h0)
+	h[1] = int32(h1)
+	h[2] = int32(h2)
+	h[3] = int32(h3)
+	h[4] = int32(h4)
+	h[5] = int32(h5)
+	h[6] = int32(h6)
+	h[7] = int32(h7)
+	h[8] = int32(h8)
+	h[9] = int32(h9)
+}
+
+// FeMul calculates h = f * g
+// Can overlap h with f or g.
+//
+// Preconditions:
+//    |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
+//    |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
+//
+// Postconditions:
+//    |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
+//
+// Notes on implementation strategy:
+//
+// Using schoolbook multiplication.
+// Karatsuba would save a little in some cost models.
+//
+// Most multiplications by 2 and 19 are 32-bit precomputations;
+// cheaper than 64-bit postcomputations.
+//
+// There is one remaining multiplication by 19 in the carry chain;
+// one *19 precomputation can be merged into this,
+// but the resulting data flow is considerably less clean.
+//
+// There are 12 carries below.
+// 10 of them are 2-way parallelizable and vectorizable.
+// Can get away with 11 carries, but then data flow is much deeper.
+//
+// With tighter constraints on inputs, can squeeze carries into int32.
+func FeMul(h, f, g *FieldElement) {
+	f0 := int64(f[0])
+	f1 := int64(f[1])
+	f2 := int64(f[2])
+	f3 := int64(f[3])
+	f4 := int64(f[4])
+	f5 := int64(f[5])
+	f6 := int64(f[6])
+	f7 := int64(f[7])
+	f8 := int64(f[8])
+	f9 := int64(f[9])
+
+	f1_2 := int64(2 * f[1])
+	f3_2 := int64(2 * f[3])
+	f5_2 := int64(2 * f[5])
+	f7_2 := int64(2 * f[7])
+	f9_2 := int64(2 * f[9])
+
+	g0 := int64(g[0])
+	g1 := int64(g[1])
+	g2 := int64(g[2])
+	g3 := int64(g[3])
+	g4 := int64(g[4])
+	g5 := int64(g[5])
+	g6 := int64(g[6])
+	g7 := int64(g[7])
+	g8 := int64(g[8])
+	g9 := int64(g[9])
+
+	g1_19 := int64(19 * g[1]) /* 1.4*2^29 */
+	g2_19 := int64(19 * g[2]) /* 1.4*2^30; still ok */
+	g3_19 := int64(19 * g[3])
+	g4_19 := int64(19 * g[4])
+	g5_19 := int64(19 * g[5])
+	g6_19 := int64(19 * g[6])
+	g7_19 := int64(19 * g[7])
+	g8_19 := int64(19 * g[8])
+	g9_19 := int64(19 * g[9])
+
+	h0 := f0*g0 + f1_2*g9_19 + f2*g8_19 + f3_2*g7_19 + f4*g6_19 + f5_2*g5_19 + f6*g4_19 + f7_2*g3_19 + f8*g2_19 + f9_2*g1_19
+	h1 := f0*g1 + f1*g0 + f2*g9_19 + f3*g8_19 + f4*g7_19 + f5*g6_19 + f6*g5_19 + f7*g4_19 + f8*g3_19 + f9*g2_19
+	h2 := f0*g2 + f1_2*g1 + f2*g0 + f3_2*g9_19 + f4*g8_19 + f5_2*g7_19 + f6*g6_19 + f7_2*g5_19 + f8*g4_19 + f9_2*g3_19
+	h3 := f0*g3 + f1*g2 + f2*g1 + f3*g0 + f4*g9_19 + f5*g8_19 + f6*g7_19 + f7*g6_19 + f8*g5_19 + f9*g4_19
+	h4 := f0*g4 + f1_2*g3 + f2*g2 + f3_2*g1 + f4*g0 + f5_2*g9_19 + f6*g8_19 + f7_2*g7_19 + f8*g6_19 + f9_2*g5_19
+	h5 := f0*g5 + f1*g4 + f2*g3 + f3*g2 + f4*g1 + f5*g0 + f6*g9_19 + f7*g8_19 + f8*g7_19 + f9*g6_19
+	h6 := f0*g6 + f1_2*g5 + f2*g4 + f3_2*g3 + f4*g2 + f5_2*g1 + f6*g0 + f7_2*g9_19 + f8*g8_19 + f9_2*g7_19
+	h7 := f0*g7 + f1*g6 + f2*g5 + f3*g4 + f4*g3 + f5*g2 + f6*g1 + f7*g0 + f8*g9_19 + f9*g8_19
+	h8 := f0*g8 + f1_2*g7 + f2*g6 + f3_2*g5 + f4*g4 + f5_2*g3 + f6*g2 + f7_2*g1 + f8*g0 + f9_2*g9_19
+	h9 := f0*g9 + f1*g8 + f2*g7 + f3*g6 + f4*g5 + f5*g4 + f6*g3 + f7*g2 + f8*g1 + f9*g0
+
+	FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9)
+}
+
+func feSquare(f *FieldElement) (h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 int64) {
+	f0 := int64(f[0])
+	f1 := int64(f[1])
+	f2 := int64(f[2])
+	f3 := int64(f[3])
+	f4 := int64(f[4])
+	f5 := int64(f[5])
+	f6 := int64(f[6])
+	f7 := int64(f[7])
+	f8 := int64(f[8])
+	f9 := int64(f[9])
+	f0_2 := int64(2 * f[0])
+	f1_2 := int64(2 * f[1])
+	f2_2 := int64(2 * f[2])
+	f3_2 := int64(2 * f[3])
+	f4_2 := int64(2 * f[4])
+	f5_2 := int64(2 * f[5])
+	f6_2 := int64(2 * f[6])
+	f7_2 := int64(2 * f[7])
+	f5_38 := 38 * f5 // 1.31*2^30
+	f6_19 := 19 * f6 // 1.31*2^30
+	f7_38 := 38 * f7 // 1.31*2^30
+	f8_19 := 19 * f8 // 1.31*2^30
+	f9_38 := 38 * f9 // 1.31*2^30
+
+	h0 = f0*f0 + f1_2*f9_38 + f2_2*f8_19 + f3_2*f7_38 + f4_2*f6_19 + f5*f5_38
+	h1 = f0_2*f1 + f2*f9_38 + f3_2*f8_19 + f4*f7_38 + f5_2*f6_19
+	h2 = f0_2*f2 + f1_2*f1 + f3_2*f9_38 + f4_2*f8_19 + f5_2*f7_38 + f6*f6_19
+	h3 = f0_2*f3 + f1_2*f2 + f4*f9_38 + f5_2*f8_19 + f6*f7_38
+	h4 = f0_2*f4 + f1_2*f3_2 + f2*f2 + f5_2*f9_38 + f6_2*f8_19 + f7*f7_38
+	h5 = f0_2*f5 + f1_2*f4 + f2_2*f3 + f6*f9_38 + f7_2*f8_19
+	h6 = f0_2*f6 + f1_2*f5_2 + f2_2*f4 + f3_2*f3 + f7_2*f9_38 + f8*f8_19
+	h7 = f0_2*f7 + f1_2*f6 + f2_2*f5 + f3_2*f4 + f8*f9_38
+	h8 = f0_2*f8 + f1_2*f7_2 + f2_2*f6 + f3_2*f5_2 + f4*f4 + f9*f9_38
+	h9 = f0_2*f9 + f1_2*f8 + f2_2*f7 + f3_2*f6 + f4_2*f5
+
+	return
+}
+
+// FeSquare calculates h = f*f. Can overlap h with f.
+//
+// Preconditions:
+//    |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
+//
+// Postconditions:
+//    |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
+func FeSquare(h, f *FieldElement) {
+	h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 := feSquare(f)
+	FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9)
+}
+
+// FeSquare2 sets h = 2 * f * f
+//
+// Can overlap h with f.
+//
+// Preconditions:
+//    |f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
+//
+// Postconditions:
+//    |h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc.
+// See fe_mul.c for discussion of implementation strategy.
+func FeSquare2(h, f *FieldElement) {
+	h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 := feSquare(f)
+
+	h0 += h0
+	h1 += h1
+	h2 += h2
+	h3 += h3
+	h4 += h4
+	h5 += h5
+	h6 += h6
+	h7 += h7
+	h8 += h8
+	h9 += h9
+
+	FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9)
+}
+
+func FeInvert(out, z *FieldElement) {
+	var t0, t1, t2, t3 FieldElement
+	var i int
+
+	FeSquare(&t0, z)        // 2^1
+	FeSquare(&t1, &t0)      // 2^2
+	for i = 1; i < 2; i++ { // 2^3
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t1, z, &t1)      // 2^3 + 2^0
+	FeMul(&t0, &t0, &t1)    // 2^3 + 2^1 + 2^0
+	FeSquare(&t2, &t0)      // 2^4 + 2^2 + 2^1
+	FeMul(&t1, &t1, &t2)    // 2^4 + 2^3 + 2^2 + 2^1 + 2^0
+	FeSquare(&t2, &t1)      // 5,4,3,2,1
+	for i = 1; i < 5; i++ { // 9,8,7,6,5
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t1, &t2, &t1)     // 9,8,7,6,5,4,3,2,1,0
+	FeSquare(&t2, &t1)       // 10..1
+	for i = 1; i < 10; i++ { // 19..10
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t2, &t2, &t1)     // 19..0
+	FeSquare(&t3, &t2)       // 20..1
+	for i = 1; i < 20; i++ { // 39..20
+		FeSquare(&t3, &t3)
+	}
+	FeMul(&t2, &t3, &t2)     // 39..0
+	FeSquare(&t2, &t2)       // 40..1
+	for i = 1; i < 10; i++ { // 49..10
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t1, &t2, &t1)     // 49..0
+	FeSquare(&t2, &t1)       // 50..1
+	for i = 1; i < 50; i++ { // 99..50
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t2, &t2, &t1)      // 99..0
+	FeSquare(&t3, &t2)        // 100..1
+	for i = 1; i < 100; i++ { // 199..100
+		FeSquare(&t3, &t3)
+	}
+	FeMul(&t2, &t3, &t2)     // 199..0
+	FeSquare(&t2, &t2)       // 200..1
+	for i = 1; i < 50; i++ { // 249..50
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t1, &t2, &t1)    // 249..0
+	FeSquare(&t1, &t1)      // 250..1
+	for i = 1; i < 5; i++ { // 254..5
+		FeSquare(&t1, &t1)
+	}
+	FeMul(out, &t1, &t0) // 254..5,3,1,0
+}
+
+func fePow22523(out, z *FieldElement) {
+	var t0, t1, t2 FieldElement
+	var i int
+
+	FeSquare(&t0, z)
+	for i = 1; i < 1; i++ {
+		FeSquare(&t0, &t0)
+	}
+	FeSquare(&t1, &t0)
+	for i = 1; i < 2; i++ {
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t1, z, &t1)
+	FeMul(&t0, &t0, &t1)
+	FeSquare(&t0, &t0)
+	for i = 1; i < 1; i++ {
+		FeSquare(&t0, &t0)
+	}
+	FeMul(&t0, &t1, &t0)
+	FeSquare(&t1, &t0)
+	for i = 1; i < 5; i++ {
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t0, &t1, &t0)
+	FeSquare(&t1, &t0)
+	for i = 1; i < 10; i++ {
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t1, &t1, &t0)
+	FeSquare(&t2, &t1)
+	for i = 1; i < 20; i++ {
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t1, &t2, &t1)
+	FeSquare(&t1, &t1)
+	for i = 1; i < 10; i++ {
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t0, &t1, &t0)
+	FeSquare(&t1, &t0)
+	for i = 1; i < 50; i++ {
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t1, &t1, &t0)
+	FeSquare(&t2, &t1)
+	for i = 1; i < 100; i++ {
+		FeSquare(&t2, &t2)
+	}
+	FeMul(&t1, &t2, &t1)
+	FeSquare(&t1, &t1)
+	for i = 1; i < 50; i++ {
+		FeSquare(&t1, &t1)
+	}
+	FeMul(&t0, &t1, &t0)
+	FeSquare(&t0, &t0)
+	for i = 1; i < 2; i++ {
+		FeSquare(&t0, &t0)
+	}
+	FeMul(out, &t0, z)
+}
+
+// Group elements are members of the elliptic curve -x^2 + y^2 = 1 + d * x^2 *
+// y^2 where d = -121665/121666.
+//
+// Several representations are used:
+//   ProjectiveGroupElement: (X:Y:Z) satisfying x=X/Z, y=Y/Z
+//   ExtendedGroupElement: (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT
+//   CompletedGroupElement: ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T
+//   PreComputedGroupElement: (y+x,y-x,2dxy)
+
+type ProjectiveGroupElement struct {
+	X, Y, Z FieldElement
+}
+
+type ExtendedGroupElement struct {
+	X, Y, Z, T FieldElement
+}
+
+type CompletedGroupElement struct {
+	X, Y, Z, T FieldElement
+}
+
+type PreComputedGroupElement struct {
+	yPlusX, yMinusX, xy2d FieldElement
+}
+
+type CachedGroupElement struct {
+	yPlusX, yMinusX, Z, T2d FieldElement
+}
+
+func (p *ProjectiveGroupElement) Zero() {
+	FeZero(&p.X)
+	FeOne(&p.Y)
+	FeOne(&p.Z)
+}
+
+func (p *ProjectiveGroupElement) Double(r *CompletedGroupElement) {
+	var t0 FieldElement
+
+	FeSquare(&r.X, &p.X)
+	FeSquare(&r.Z, &p.Y)
+	FeSquare2(&r.T, &p.Z)
+	FeAdd(&r.Y, &p.X, &p.Y)
+	FeSquare(&t0, &r.Y)
+	FeAdd(&r.Y, &r.Z, &r.X)
+	FeSub(&r.Z, &r.Z, &r.X)
+	FeSub(&r.X, &t0, &r.Y)
+	FeSub(&r.T, &r.T, &r.Z)
+}
+
+func (p *ProjectiveGroupElement) ToBytes(s *[32]byte) {
+	var recip, x, y FieldElement
+
+	FeInvert(&recip, &p.Z)
+	FeMul(&x, &p.X, &recip)
+	FeMul(&y, &p.Y, &recip)
+	FeToBytes(s, &y)
+	s[31] ^= FeIsNegative(&x) << 7
+}
+
+func (p *ExtendedGroupElement) Zero() {
+	FeZero(&p.X)
+	FeOne(&p.Y)
+	FeOne(&p.Z)
+	FeZero(&p.T)
+}
+
+func (p *ExtendedGroupElement) Double(r *CompletedGroupElement) {
+	var q ProjectiveGroupElement
+	p.ToProjective(&q)
+	q.Double(r)
+}
+
+func (p *ExtendedGroupElement) ToCached(r *CachedGroupElement) {
+	FeAdd(&r.yPlusX, &p.Y, &p.X)
+	FeSub(&r.yMinusX, &p.Y, &p.X)
+	FeCopy(&r.Z, &p.Z)
+	FeMul(&r.T2d, &p.T, &d2)
+}
+
+func (p *ExtendedGroupElement) ToProjective(r *ProjectiveGroupElement) {
+	FeCopy(&r.X, &p.X)
+	FeCopy(&r.Y, &p.Y)
+	FeCopy(&r.Z, &p.Z)
+}
+
+func (p *ExtendedGroupElement) ToBytes(s *[32]byte) {
+	var recip, x, y FieldElement
+
+	FeInvert(&recip, &p.Z)
+	FeMul(&x, &p.X, &recip)
+	FeMul(&y, &p.Y, &recip)
+	FeToBytes(s, &y)
+	s[31] ^= FeIsNegative(&x) << 7
+}
+
+func (p *ExtendedGroupElement) FromBytes(s *[32]byte) bool {
+	var u, v, v3, vxx, check FieldElement
+
+	FeFromBytes(&p.Y, s)
+	FeOne(&p.Z)
+	FeSquare(&u, &p.Y)
+	FeMul(&v, &u, &d)
+	FeSub(&u, &u, &p.Z) // y = y^2-1
+	FeAdd(&v, &v, &p.Z) // v = dy^2+1
+
+	FeSquare(&v3, &v)
+	FeMul(&v3, &v3, &v) // v3 = v^3
+	FeSquare(&p.X, &v3)
+	FeMul(&p.X, &p.X, &v)
+	FeMul(&p.X, &p.X, &u) // x = uv^7
+
+	fePow22523(&p.X, &p.X) // x = (uv^7)^((q-5)/8)
+	FeMul(&p.X, &p.X, &v3)
+	FeMul(&p.X, &p.X, &u) // x = uv^3(uv^7)^((q-5)/8)
+
+	var tmpX, tmp2 [32]byte
+
+	FeSquare(&vxx, &p.X)
+	FeMul(&vxx, &vxx, &v)
+	FeSub(&check, &vxx, &u) // vx^2-u
+	if FeIsNonZero(&check) == 1 {
+		FeAdd(&check, &vxx, &u) // vx^2+u
+		if FeIsNonZero(&check) == 1 {
+			return false
+		}
+		FeMul(&p.X, &p.X, &SqrtM1)
+
+		FeToBytes(&tmpX, &p.X)
+		for i, v := range tmpX {
+			tmp2[31-i] = v
+		}
+	}
+
+	if FeIsNegative(&p.X) != (s[31] >> 7) {
+		FeNeg(&p.X, &p.X)
+	}
+
+	FeMul(&p.T, &p.X, &p.Y)
+	return true
+}
+
+func (p *CompletedGroupElement) ToProjective(r *ProjectiveGroupElement) {
+	FeMul(&r.X, &p.X, &p.T)
+	FeMul(&r.Y, &p.Y, &p.Z)
+	FeMul(&r.Z, &p.Z, &p.T)
+}
+
+func (p *CompletedGroupElement) ToExtended(r *ExtendedGroupElement) {
+	FeMul(&r.X, &p.X, &p.T)
+	FeMul(&r.Y, &p.Y, &p.Z)
+	FeMul(&r.Z, &p.Z, &p.T)
+	FeMul(&r.T, &p.X, &p.Y)
+}
+
+func (p *PreComputedGroupElement) Zero() {
+	FeOne(&p.yPlusX)
+	FeOne(&p.yMinusX)
+	FeZero(&p.xy2d)
+}
+
+func geAdd(r *CompletedGroupElement, p *ExtendedGroupElement, q *CachedGroupElement) {
+	var t0 FieldElement
+
+	FeAdd(&r.X, &p.Y, &p.X)
+	FeSub(&r.Y, &p.Y, &p.X)
+	FeMul(&r.Z, &r.X, &q.yPlusX)
+	FeMul(&r.Y, &r.Y, &q.yMinusX)
+	FeMul(&r.T, &q.T2d, &p.T)
+	FeMul(&r.X, &p.Z, &q.Z)
+	FeAdd(&t0, &r.X, &r.X)
+	FeSub(&r.X, &r.Z, &r.Y)
+	FeAdd(&r.Y, &r.Z, &r.Y)
+	FeAdd(&r.Z, &t0, &r.T)
+	FeSub(&r.T, &t0, &r.T)
+}
+
+func geSub(r *CompletedGroupElement, p *ExtendedGroupElement, q *CachedGroupElement) {
+	var t0 FieldElement
+
+	FeAdd(&r.X, &p.Y, &p.X)
+	FeSub(&r.Y, &p.Y, &p.X)
+	FeMul(&r.Z, &r.X, &q.yMinusX)
+	FeMul(&r.Y, &r.Y, &q.yPlusX)
+	FeMul(&r.T, &q.T2d, &p.T)
+	FeMul(&r.X, &p.Z, &q.Z)
+	FeAdd(&t0, &r.X, &r.X)
+	FeSub(&r.X, &r.Z, &r.Y)
+	FeAdd(&r.Y, &r.Z, &r.Y)
+	FeSub(&r.Z, &t0, &r.T)
+	FeAdd(&r.T, &t0, &r.T)
+}
+
+func geMixedAdd(r *CompletedGroupElement, p *ExtendedGroupElement, q *PreComputedGroupElement) {
+	var t0 FieldElement
+
+	FeAdd(&r.X, &p.Y, &p.X)
+	FeSub(&r.Y, &p.Y, &p.X)
+	FeMul(&r.Z, &r.X, &q.yPlusX)
+	FeMul(&r.Y, &r.Y, &q.yMinusX)
+	FeMul(&r.T, &q.xy2d, &p.T)
+	FeAdd(&t0, &p.Z, &p.Z)
+	FeSub(&r.X, &r.Z, &r.Y)
+	FeAdd(&r.Y, &r.Z, &r.Y)
+	FeAdd(&r.Z, &t0, &r.T)
+	FeSub(&r.T, &t0, &r.T)
+}
+
+func geMixedSub(r *CompletedGroupElement, p *ExtendedGroupElement, q *PreComputedGroupElement) {
+	var t0 FieldElement
+
+	FeAdd(&r.X, &p.Y, &p.X)
+	FeSub(&r.Y, &p.Y, &p.X)
+	FeMul(&r.Z, &r.X, &q.yMinusX)
+	FeMul(&r.Y, &r.Y, &q.yPlusX)
+	FeMul(&r.T, &q.xy2d, &p.T)
+	FeAdd(&t0, &p.Z, &p.Z)
+	FeSub(&r.X, &r.Z, &r.Y)
+	FeAdd(&r.Y, &r.Z, &r.Y)
+	FeSub(&r.Z, &t0, &r.T)
+	FeAdd(&r.T, &t0, &r.T)
+}
+
+func slide(r *[256]int8, a *[32]byte) {
+	for i := range r {
+		r[i] = int8(1 & (a[i>>3] >> uint(i&7)))
+	}
+
+	for i := range r {
+		if r[i] != 0 {
+			for b := 1; b <= 6 && i+b < 256; b++ {
+				if r[i+b] != 0 {
+					if r[i]+(r[i+b]<<uint(b)) <= 15 {
+						r[i] += r[i+b] << uint(b)
+						r[i+b] = 0
+					} else if r[i]-(r[i+b]<<uint(b)) >= -15 {
+						r[i] -= r[i+b] << uint(b)
+						for k := i + b; k < 256; k++ {
+							if r[k] == 0 {
+								r[k] = 1
+								break
+							}
+							r[k] = 0
+						}
+					} else {
+						break
+					}
+				}
+			}
+		}
+	}
+}
+
+// GeDoubleScalarMultVartime sets r = a*A + b*B
+// where a = a[0]+256*a[1]+...+256^31 a[31].
+// and b = b[0]+256*b[1]+...+256^31 b[31].
+// B is the Ed25519 base point (x,4/5) with x positive.
+func GeDoubleScalarMultVartime(r *ProjectiveGroupElement, a *[32]byte, A *ExtendedGroupElement, b *[32]byte) {
+	var aSlide, bSlide [256]int8
+	var Ai [8]CachedGroupElement // A,3A,5A,7A,9A,11A,13A,15A
+	var t CompletedGroupElement
+	var u, A2 ExtendedGroupElement
+	var i int
+
+	slide(&aSlide, a)
+	slide(&bSlide, b)
+
+	A.ToCached(&Ai[0])
+	A.Double(&t)
+	t.ToExtended(&A2)
+
+	for i := 0; i < 7; i++ {
+		geAdd(&t, &A2, &Ai[i])
+		t.ToExtended(&u)
+		u.ToCached(&Ai[i+1])
+	}
+
+	r.Zero()
+
+	for i = 255; i >= 0; i-- {
+		if aSlide[i] != 0 || bSlide[i] != 0 {
+			break
+		}
+	}
+
+	for ; i >= 0; i-- {
+		r.Double(&t)
+
+		if aSlide[i] > 0 {
+			t.ToExtended(&u)
+			geAdd(&t, &u, &Ai[aSlide[i]/2])
+		} else if aSlide[i] < 0 {
+			t.ToExtended(&u)
+			geSub(&t, &u, &Ai[(-aSlide[i])/2])
+		}
+
+		if bSlide[i] > 0 {
+			t.ToExtended(&u)
+			geMixedAdd(&t, &u, &bi[bSlide[i]/2])
+		} else if bSlide[i] < 0 {
+			t.ToExtended(&u)
+			geMixedSub(&t, &u, &bi[(-bSlide[i])/2])
+		}
+
+		t.ToProjective(r)
+	}
+}
+
+// equal returns 1 if b == c and 0 otherwise, assuming that b and c are
+// non-negative.
+func equal(b, c int32) int32 {
+	x := uint32(b ^ c)
+	x--
+	return int32(x >> 31)
+}
+
+// negative returns 1 if b < 0 and 0 otherwise.
+func negative(b int32) int32 {
+	return (b >> 31) & 1
+}
+
+func PreComputedGroupElementCMove(t, u *PreComputedGroupElement, b int32) {
+	FeCMove(&t.yPlusX, &u.yPlusX, b)
+	FeCMove(&t.yMinusX, &u.yMinusX, b)
+	FeCMove(&t.xy2d, &u.xy2d, b)
+}
+
+func selectPoint(t *PreComputedGroupElement, pos int32, b int32) {
+	var minusT PreComputedGroupElement
+	bNegative := negative(b)
+	bAbs := b - (((-bNegative) & b) << 1)
+
+	t.Zero()
+	for i := int32(0); i < 8; i++ {
+		PreComputedGroupElementCMove(t, &base[pos][i], equal(bAbs, i+1))
+	}
+	FeCopy(&minusT.yPlusX, &t.yMinusX)
+	FeCopy(&minusT.yMinusX, &t.yPlusX)
+	FeNeg(&minusT.xy2d, &t.xy2d)
+	PreComputedGroupElementCMove(t, &minusT, bNegative)
+}
+
+// GeScalarMultBase computes h = a*B, where
+//   a = a[0]+256*a[1]+...+256^31 a[31]
+//   B is the Ed25519 base point (x,4/5) with x positive.
+//
+// Preconditions:
+//   a[31] <= 127
+func GeScalarMultBase(h *ExtendedGroupElement, a *[32]byte) {
+	var e [64]int8
+
+	for i, v := range a {
+		e[2*i] = int8(v & 15)
+		e[2*i+1] = int8((v >> 4) & 15)
+	}
+
+	// each e[i] is between 0 and 15 and e[63] is between 0 and 7.
+
+	carry := int8(0)
+	for i := 0; i < 63; i++ {
+		e[i] += carry
+		carry = (e[i] + 8) >> 4
+		e[i] -= carry << 4
+	}
+	e[63] += carry
+	// each e[i] is between -8 and 8.
+
+	h.Zero()
+	var t PreComputedGroupElement
+	var r CompletedGroupElement
+	for i := int32(1); i < 64; i += 2 {
+		selectPoint(&t, i/2, int32(e[i]))
+		geMixedAdd(&r, h, &t)
+		r.ToExtended(h)
+	}
+
+	var s ProjectiveGroupElement
+
+	h.Double(&r)
+	r.ToProjective(&s)
+	s.Double(&r)
+	r.ToProjective(&s)
+	s.Double(&r)
+	r.ToProjective(&s)
+	s.Double(&r)
+	r.ToExtended(h)
+
+	for i := int32(0); i < 64; i += 2 {
+		selectPoint(&t, i/2, int32(e[i]))
+		geMixedAdd(&r, h, &t)
+		r.ToExtended(h)
+	}
+}
+
+// The scalars are GF(2^252 + 27742317777372353535851937790883648493).
+
+// Input:
+//   a[0]+256*a[1]+...+256^31*a[31] = a
+//   b[0]+256*b[1]+...+256^31*b[31] = b
+//   c[0]+256*c[1]+...+256^31*c[31] = c
+//
+// Output:
+//   s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l
+//   where l = 2^252 + 27742317777372353535851937790883648493.
+func ScMulAdd(s, a, b, c *[32]byte) {
+	a0 := 2097151 & load3(a[:])
+	a1 := 2097151 & (load4(a[2:]) >> 5)
+	a2 := 2097151 & (load3(a[5:]) >> 2)
+	a3 := 2097151 & (load4(a[7:]) >> 7)
+	a4 := 2097151 & (load4(a[10:]) >> 4)
+	a5 := 2097151 & (load3(a[13:]) >> 1)
+	a6 := 2097151 & (load4(a[15:]) >> 6)
+	a7 := 2097151 & (load3(a[18:]) >> 3)
+	a8 := 2097151 & load3(a[21:])
+	a9 := 2097151 & (load4(a[23:]) >> 5)
+	a10 := 2097151 & (load3(a[26:]) >> 2)
+	a11 := (load4(a[28:]) >> 7)
+	b0 := 2097151 & load3(b[:])
+	b1 := 2097151 & (load4(b[2:]) >> 5)
+	b2 := 2097151 & (load3(b[5:]) >> 2)
+	b3 := 2097151 & (load4(b[7:]) >> 7)
+	b4 := 2097151 & (load4(b[10:]) >> 4)
+	b5 := 2097151 & (load3(b[13:]) >> 1)
+	b6 := 2097151 & (load4(b[15:]) >> 6)
+	b7 := 2097151 & (load3(b[18:]) >> 3)
+	b8 := 2097151 & load3(b[21:])
+	b9 := 2097151 & (load4(b[23:]) >> 5)
+	b10 := 2097151 & (load3(b[26:]) >> 2)
+	b11 := (load4(b[28:]) >> 7)
+	c0 := 2097151 & load3(c[:])
+	c1 := 2097151 & (load4(c[2:]) >> 5)
+	c2 := 2097151 & (load3(c[5:]) >> 2)
+	c3 := 2097151 & (load4(c[7:]) >> 7)
+	c4 := 2097151 & (load4(c[10:]) >> 4)
+	c5 := 2097151 & (load3(c[13:]) >> 1)
+	c6 := 2097151 & (load4(c[15:]) >> 6)
+	c7 := 2097151 & (load3(c[18:]) >> 3)
+	c8 := 2097151 & load3(c[21:])
+	c9 := 2097151 & (load4(c[23:]) >> 5)
+	c10 := 2097151 & (load3(c[26:]) >> 2)
+	c11 := (load4(c[28:]) >> 7)
+	var carry [23]int64
+
+	s0 := c0 + a0*b0
+	s1 := c1 + a0*b1 + a1*b0
+	s2 := c2 + a0*b2 + a1*b1 + a2*b0
+	s3 := c3 + a0*b3 + a1*b2 + a2*b1 + a3*b0
+	s4 := c4 + a0*b4 + a1*b3 + a2*b2 + a3*b1 + a4*b0
+	s5 := c5 + a0*b5 + a1*b4 + a2*b3 + a3*b2 + a4*b1 + a5*b0
+	s6 := c6 + a0*b6 + a1*b5 + a2*b4 + a3*b3 + a4*b2 + a5*b1 + a6*b0
+	s7 := c7 + a0*b7 + a1*b6 + a2*b5 + a3*b4 + a4*b3 + a5*b2 + a6*b1 + a7*b0
+	s8 := c8 + a0*b8 + a1*b7 + a2*b6 + a3*b5 + a4*b4 + a5*b3 + a6*b2 + a7*b1 + a8*b0
+	s9 := c9 + a0*b9 + a1*b8 + a2*b7 + a3*b6 + a4*b5 + a5*b4 + a6*b3 + a7*b2 + a8*b1 + a9*b0
+	s10 := c10 + a0*b10 + a1*b9 + a2*b8 + a3*b7 + a4*b6 + a5*b5 + a6*b4 + a7*b3 + a8*b2 + a9*b1 + a10*b0
+	s11 := c11 + a0*b11 + a1*b10 + a2*b9 + a3*b8 + a4*b7 + a5*b6 + a6*b5 + a7*b4 + a8*b3 + a9*b2 + a10*b1 + a11*b0
+	s12 := a1*b11 + a2*b10 + a3*b9 + a4*b8 + a5*b7 + a6*b6 + a7*b5 + a8*b4 + a9*b3 + a10*b2 + a11*b1
+	s13 := a2*b11 + a3*b10 + a4*b9 + a5*b8 + a6*b7 + a7*b6 + a8*b5 + a9*b4 + a10*b3 + a11*b2
+	s14 := a3*b11 + a4*b10 + a5*b9 + a6*b8 + a7*b7 + a8*b6 + a9*b5 + a10*b4 + a11*b3
+	s15 := a4*b11 + a5*b10 + a6*b9 + a7*b8 + a8*b7 + a9*b6 + a10*b5 + a11*b4
+	s16 := a5*b11 + a6*b10 + a7*b9 + a8*b8 + a9*b7 + a10*b6 + a11*b5
+	s17 := a6*b11 + a7*b10 + a8*b9 + a9*b8 + a10*b7 + a11*b6
+	s18 := a7*b11 + a8*b10 + a9*b9 + a10*b8 + a11*b7
+	s19 := a8*b11 + a9*b10 + a10*b9 + a11*b8
+	s20 := a9*b11 + a10*b10 + a11*b9
+	s21 := a10*b11 + a11*b10
+	s22 := a11 * b11
+	s23 := int64(0)
+
+	carry[0] = (s0 + (1 << 20)) >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[2] = (s2 + (1 << 20)) >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[4] = (s4 + (1 << 20)) >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[6] = (s6 + (1 << 20)) >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[8] = (s8 + (1 << 20)) >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[10] = (s10 + (1 << 20)) >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+	carry[12] = (s12 + (1 << 20)) >> 21
+	s13 += carry[12]
+	s12 -= carry[12] << 21
+	carry[14] = (s14 + (1 << 20)) >> 21
+	s15 += carry[14]
+	s14 -= carry[14] << 21
+	carry[16] = (s16 + (1 << 20)) >> 21
+	s17 += carry[16]
+	s16 -= carry[16] << 21
+	carry[18] = (s18 + (1 << 20)) >> 21
+	s19 += carry[18]
+	s18 -= carry[18] << 21
+	carry[20] = (s20 + (1 << 20)) >> 21
+	s21 += carry[20]
+	s20 -= carry[20] << 21
+	carry[22] = (s22 + (1 << 20)) >> 21
+	s23 += carry[22]
+	s22 -= carry[22] << 21
+
+	carry[1] = (s1 + (1 << 20)) >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[3] = (s3 + (1 << 20)) >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[5] = (s5 + (1 << 20)) >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[7] = (s7 + (1 << 20)) >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[9] = (s9 + (1 << 20)) >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[11] = (s11 + (1 << 20)) >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+	carry[13] = (s13 + (1 << 20)) >> 21
+	s14 += carry[13]
+	s13 -= carry[13] << 21
+	carry[15] = (s15 + (1 << 20)) >> 21
+	s16 += carry[15]
+	s15 -= carry[15] << 21
+	carry[17] = (s17 + (1 << 20)) >> 21
+	s18 += carry[17]
+	s17 -= carry[17] << 21
+	carry[19] = (s19 + (1 << 20)) >> 21
+	s20 += carry[19]
+	s19 -= carry[19] << 21
+	carry[21] = (s21 + (1 << 20)) >> 21
+	s22 += carry[21]
+	s21 -= carry[21] << 21
+
+	s11 += s23 * 666643
+	s12 += s23 * 470296
+	s13 += s23 * 654183
+	s14 -= s23 * 997805
+	s15 += s23 * 136657
+	s16 -= s23 * 683901
+	s23 = 0
+
+	s10 += s22 * 666643
+	s11 += s22 * 470296
+	s12 += s22 * 654183
+	s13 -= s22 * 997805
+	s14 += s22 * 136657
+	s15 -= s22 * 683901
+	s22 = 0
+
+	s9 += s21 * 666643
+	s10 += s21 * 470296
+	s11 += s21 * 654183
+	s12 -= s21 * 997805
+	s13 += s21 * 136657
+	s14 -= s21 * 683901
+	s21 = 0
+
+	s8 += s20 * 666643
+	s9 += s20 * 470296
+	s10 += s20 * 654183
+	s11 -= s20 * 997805
+	s12 += s20 * 136657
+	s13 -= s20 * 683901
+	s20 = 0
+
+	s7 += s19 * 666643
+	s8 += s19 * 470296
+	s9 += s19 * 654183
+	s10 -= s19 * 997805
+	s11 += s19 * 136657
+	s12 -= s19 * 683901
+	s19 = 0
+
+	s6 += s18 * 666643
+	s7 += s18 * 470296
+	s8 += s18 * 654183
+	s9 -= s18 * 997805
+	s10 += s18 * 136657
+	s11 -= s18 * 683901
+	s18 = 0
+
+	carry[6] = (s6 + (1 << 20)) >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[8] = (s8 + (1 << 20)) >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[10] = (s10 + (1 << 20)) >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+	carry[12] = (s12 + (1 << 20)) >> 21
+	s13 += carry[12]
+	s12 -= carry[12] << 21
+	carry[14] = (s14 + (1 << 20)) >> 21
+	s15 += carry[14]
+	s14 -= carry[14] << 21
+	carry[16] = (s16 + (1 << 20)) >> 21
+	s17 += carry[16]
+	s16 -= carry[16] << 21
+
+	carry[7] = (s7 + (1 << 20)) >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[9] = (s9 + (1 << 20)) >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[11] = (s11 + (1 << 20)) >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+	carry[13] = (s13 + (1 << 20)) >> 21
+	s14 += carry[13]
+	s13 -= carry[13] << 21
+	carry[15] = (s15 + (1 << 20)) >> 21
+	s16 += carry[15]
+	s15 -= carry[15] << 21
+
+	s5 += s17 * 666643
+	s6 += s17 * 470296
+	s7 += s17 * 654183
+	s8 -= s17 * 997805
+	s9 += s17 * 136657
+	s10 -= s17 * 683901
+	s17 = 0
+
+	s4 += s16 * 666643
+	s5 += s16 * 470296
+	s6 += s16 * 654183
+	s7 -= s16 * 997805
+	s8 += s16 * 136657
+	s9 -= s16 * 683901
+	s16 = 0
+
+	s3 += s15 * 666643
+	s4 += s15 * 470296
+	s5 += s15 * 654183
+	s6 -= s15 * 997805
+	s7 += s15 * 136657
+	s8 -= s15 * 683901
+	s15 = 0
+
+	s2 += s14 * 666643
+	s3 += s14 * 470296
+	s4 += s14 * 654183
+	s5 -= s14 * 997805
+	s6 += s14 * 136657
+	s7 -= s14 * 683901
+	s14 = 0
+
+	s1 += s13 * 666643
+	s2 += s13 * 470296
+	s3 += s13 * 654183
+	s4 -= s13 * 997805
+	s5 += s13 * 136657
+	s6 -= s13 * 683901
+	s13 = 0
+
+	s0 += s12 * 666643
+	s1 += s12 * 470296
+	s2 += s12 * 654183
+	s3 -= s12 * 997805
+	s4 += s12 * 136657
+	s5 -= s12 * 683901
+	s12 = 0
+
+	carry[0] = (s0 + (1 << 20)) >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[2] = (s2 + (1 << 20)) >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[4] = (s4 + (1 << 20)) >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[6] = (s6 + (1 << 20)) >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[8] = (s8 + (1 << 20)) >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[10] = (s10 + (1 << 20)) >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+
+	carry[1] = (s1 + (1 << 20)) >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[3] = (s3 + (1 << 20)) >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[5] = (s5 + (1 << 20)) >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[7] = (s7 + (1 << 20)) >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[9] = (s9 + (1 << 20)) >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[11] = (s11 + (1 << 20)) >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+
+	s0 += s12 * 666643
+	s1 += s12 * 470296
+	s2 += s12 * 654183
+	s3 -= s12 * 997805
+	s4 += s12 * 136657
+	s5 -= s12 * 683901
+	s12 = 0
+
+	carry[0] = s0 >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[1] = s1 >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[2] = s2 >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[3] = s3 >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[4] = s4 >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[5] = s5 >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[6] = s6 >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[7] = s7 >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[8] = s8 >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[9] = s9 >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[10] = s10 >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+	carry[11] = s11 >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+
+	s0 += s12 * 666643
+	s1 += s12 * 470296
+	s2 += s12 * 654183
+	s3 -= s12 * 997805
+	s4 += s12 * 136657
+	s5 -= s12 * 683901
+	s12 = 0
+
+	carry[0] = s0 >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[1] = s1 >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[2] = s2 >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[3] = s3 >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[4] = s4 >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[5] = s5 >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[6] = s6 >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[7] = s7 >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[8] = s8 >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[9] = s9 >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[10] = s10 >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+
+	s[0] = byte(s0 >> 0)
+	s[1] = byte(s0 >> 8)
+	s[2] = byte((s0 >> 16) | (s1 << 5))
+	s[3] = byte(s1 >> 3)
+	s[4] = byte(s1 >> 11)
+	s[5] = byte((s1 >> 19) | (s2 << 2))
+	s[6] = byte(s2 >> 6)
+	s[7] = byte((s2 >> 14) | (s3 << 7))
+	s[8] = byte(s3 >> 1)
+	s[9] = byte(s3 >> 9)
+	s[10] = byte((s3 >> 17) | (s4 << 4))
+	s[11] = byte(s4 >> 4)
+	s[12] = byte(s4 >> 12)
+	s[13] = byte((s4 >> 20) | (s5 << 1))
+	s[14] = byte(s5 >> 7)
+	s[15] = byte((s5 >> 15) | (s6 << 6))
+	s[16] = byte(s6 >> 2)
+	s[17] = byte(s6 >> 10)
+	s[18] = byte((s6 >> 18) | (s7 << 3))
+	s[19] = byte(s7 >> 5)
+	s[20] = byte(s7 >> 13)
+	s[21] = byte(s8 >> 0)
+	s[22] = byte(s8 >> 8)
+	s[23] = byte((s8 >> 16) | (s9 << 5))
+	s[24] = byte(s9 >> 3)
+	s[25] = byte(s9 >> 11)
+	s[26] = byte((s9 >> 19) | (s10 << 2))
+	s[27] = byte(s10 >> 6)
+	s[28] = byte((s10 >> 14) | (s11 << 7))
+	s[29] = byte(s11 >> 1)
+	s[30] = byte(s11 >> 9)
+	s[31] = byte(s11 >> 17)
+}
+
+// Input:
+//   s[0]+256*s[1]+...+256^63*s[63] = s
+//
+// Output:
+//   s[0]+256*s[1]+...+256^31*s[31] = s mod l
+//   where l = 2^252 + 27742317777372353535851937790883648493.
+func ScReduce(out *[32]byte, s *[64]byte) {
+	s0 := 2097151 & load3(s[:])
+	s1 := 2097151 & (load4(s[2:]) >> 5)
+	s2 := 2097151 & (load3(s[5:]) >> 2)
+	s3 := 2097151 & (load4(s[7:]) >> 7)
+	s4 := 2097151 & (load4(s[10:]) >> 4)
+	s5 := 2097151 & (load3(s[13:]) >> 1)
+	s6 := 2097151 & (load4(s[15:]) >> 6)
+	s7 := 2097151 & (load3(s[18:]) >> 3)
+	s8 := 2097151 & load3(s[21:])
+	s9 := 2097151 & (load4(s[23:]) >> 5)
+	s10 := 2097151 & (load3(s[26:]) >> 2)
+	s11 := 2097151 & (load4(s[28:]) >> 7)
+	s12 := 2097151 & (load4(s[31:]) >> 4)
+	s13 := 2097151 & (load3(s[34:]) >> 1)
+	s14 := 2097151 & (load4(s[36:]) >> 6)
+	s15 := 2097151 & (load3(s[39:]) >> 3)
+	s16 := 2097151 & load3(s[42:])
+	s17 := 2097151 & (load4(s[44:]) >> 5)
+	s18 := 2097151 & (load3(s[47:]) >> 2)
+	s19 := 2097151 & (load4(s[49:]) >> 7)
+	s20 := 2097151 & (load4(s[52:]) >> 4)
+	s21 := 2097151 & (load3(s[55:]) >> 1)
+	s22 := 2097151 & (load4(s[57:]) >> 6)
+	s23 := (load4(s[60:]) >> 3)
+
+	s11 += s23 * 666643
+	s12 += s23 * 470296
+	s13 += s23 * 654183
+	s14 -= s23 * 997805
+	s15 += s23 * 136657
+	s16 -= s23 * 683901
+	s23 = 0
+
+	s10 += s22 * 666643
+	s11 += s22 * 470296
+	s12 += s22 * 654183
+	s13 -= s22 * 997805
+	s14 += s22 * 136657
+	s15 -= s22 * 683901
+	s22 = 0
+
+	s9 += s21 * 666643
+	s10 += s21 * 470296
+	s11 += s21 * 654183
+	s12 -= s21 * 997805
+	s13 += s21 * 136657
+	s14 -= s21 * 683901
+	s21 = 0
+
+	s8 += s20 * 666643
+	s9 += s20 * 470296
+	s10 += s20 * 654183
+	s11 -= s20 * 997805
+	s12 += s20 * 136657
+	s13 -= s20 * 683901
+	s20 = 0
+
+	s7 += s19 * 666643
+	s8 += s19 * 470296
+	s9 += s19 * 654183
+	s10 -= s19 * 997805
+	s11 += s19 * 136657
+	s12 -= s19 * 683901
+	s19 = 0
+
+	s6 += s18 * 666643
+	s7 += s18 * 470296
+	s8 += s18 * 654183
+	s9 -= s18 * 997805
+	s10 += s18 * 136657
+	s11 -= s18 * 683901
+	s18 = 0
+
+	var carry [17]int64
+
+	carry[6] = (s6 + (1 << 20)) >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[8] = (s8 + (1 << 20)) >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[10] = (s10 + (1 << 20)) >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+	carry[12] = (s12 + (1 << 20)) >> 21
+	s13 += carry[12]
+	s12 -= carry[12] << 21
+	carry[14] = (s14 + (1 << 20)) >> 21
+	s15 += carry[14]
+	s14 -= carry[14] << 21
+	carry[16] = (s16 + (1 << 20)) >> 21
+	s17 += carry[16]
+	s16 -= carry[16] << 21
+
+	carry[7] = (s7 + (1 << 20)) >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[9] = (s9 + (1 << 20)) >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[11] = (s11 + (1 << 20)) >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+	carry[13] = (s13 + (1 << 20)) >> 21
+	s14 += carry[13]
+	s13 -= carry[13] << 21
+	carry[15] = (s15 + (1 << 20)) >> 21
+	s16 += carry[15]
+	s15 -= carry[15] << 21
+
+	s5 += s17 * 666643
+	s6 += s17 * 470296
+	s7 += s17 * 654183
+	s8 -= s17 * 997805
+	s9 += s17 * 136657
+	s10 -= s17 * 683901
+	s17 = 0
+
+	s4 += s16 * 666643
+	s5 += s16 * 470296
+	s6 += s16 * 654183
+	s7 -= s16 * 997805
+	s8 += s16 * 136657
+	s9 -= s16 * 683901
+	s16 = 0
+
+	s3 += s15 * 666643
+	s4 += s15 * 470296
+	s5 += s15 * 654183
+	s6 -= s15 * 997805
+	s7 += s15 * 136657
+	s8 -= s15 * 683901
+	s15 = 0
+
+	s2 += s14 * 666643
+	s3 += s14 * 470296
+	s4 += s14 * 654183
+	s5 -= s14 * 997805
+	s6 += s14 * 136657
+	s7 -= s14 * 683901
+	s14 = 0
+
+	s1 += s13 * 666643
+	s2 += s13 * 470296
+	s3 += s13 * 654183
+	s4 -= s13 * 997805
+	s5 += s13 * 136657
+	s6 -= s13 * 683901
+	s13 = 0
+
+	s0 += s12 * 666643
+	s1 += s12 * 470296
+	s2 += s12 * 654183
+	s3 -= s12 * 997805
+	s4 += s12 * 136657
+	s5 -= s12 * 683901
+	s12 = 0
+
+	carry[0] = (s0 + (1 << 20)) >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[2] = (s2 + (1 << 20)) >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[4] = (s4 + (1 << 20)) >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[6] = (s6 + (1 << 20)) >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[8] = (s8 + (1 << 20)) >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[10] = (s10 + (1 << 20)) >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+
+	carry[1] = (s1 + (1 << 20)) >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[3] = (s3 + (1 << 20)) >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[5] = (s5 + (1 << 20)) >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[7] = (s7 + (1 << 20)) >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[9] = (s9 + (1 << 20)) >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[11] = (s11 + (1 << 20)) >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+
+	s0 += s12 * 666643
+	s1 += s12 * 470296
+	s2 += s12 * 654183
+	s3 -= s12 * 997805
+	s4 += s12 * 136657
+	s5 -= s12 * 683901
+	s12 = 0
+
+	carry[0] = s0 >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[1] = s1 >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[2] = s2 >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[3] = s3 >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[4] = s4 >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[5] = s5 >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[6] = s6 >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[7] = s7 >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[8] = s8 >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[9] = s9 >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[10] = s10 >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+	carry[11] = s11 >> 21
+	s12 += carry[11]
+	s11 -= carry[11] << 21
+
+	s0 += s12 * 666643
+	s1 += s12 * 470296
+	s2 += s12 * 654183
+	s3 -= s12 * 997805
+	s4 += s12 * 136657
+	s5 -= s12 * 683901
+	s12 = 0
+
+	carry[0] = s0 >> 21
+	s1 += carry[0]
+	s0 -= carry[0] << 21
+	carry[1] = s1 >> 21
+	s2 += carry[1]
+	s1 -= carry[1] << 21
+	carry[2] = s2 >> 21
+	s3 += carry[2]
+	s2 -= carry[2] << 21
+	carry[3] = s3 >> 21
+	s4 += carry[3]
+	s3 -= carry[3] << 21
+	carry[4] = s4 >> 21
+	s5 += carry[4]
+	s4 -= carry[4] << 21
+	carry[5] = s5 >> 21
+	s6 += carry[5]
+	s5 -= carry[5] << 21
+	carry[6] = s6 >> 21
+	s7 += carry[6]
+	s6 -= carry[6] << 21
+	carry[7] = s7 >> 21
+	s8 += carry[7]
+	s7 -= carry[7] << 21
+	carry[8] = s8 >> 21
+	s9 += carry[8]
+	s8 -= carry[8] << 21
+	carry[9] = s9 >> 21
+	s10 += carry[9]
+	s9 -= carry[9] << 21
+	carry[10] = s10 >> 21
+	s11 += carry[10]
+	s10 -= carry[10] << 21
+
+	out[0] = byte(s0 >> 0)
+	out[1] = byte(s0 >> 8)
+	out[2] = byte((s0 >> 16) | (s1 << 5))
+	out[3] = byte(s1 >> 3)
+	out[4] = byte(s1 >> 11)
+	out[5] = byte((s1 >> 19) | (s2 << 2))
+	out[6] = byte(s2 >> 6)
+	out[7] = byte((s2 >> 14) | (s3 << 7))
+	out[8] = byte(s3 >> 1)
+	out[9] = byte(s3 >> 9)
+	out[10] = byte((s3 >> 17) | (s4 << 4))
+	out[11] = byte(s4 >> 4)
+	out[12] = byte(s4 >> 12)
+	out[13] = byte((s4 >> 20) | (s5 << 1))
+	out[14] = byte(s5 >> 7)
+	out[15] = byte((s5 >> 15) | (s6 << 6))
+	out[16] = byte(s6 >> 2)
+	out[17] = byte(s6 >> 10)
+	out[18] = byte((s6 >> 18) | (s7 << 3))
+	out[19] = byte(s7 >> 5)
+	out[20] = byte(s7 >> 13)
+	out[21] = byte(s8 >> 0)
+	out[22] = byte(s8 >> 8)
+	out[23] = byte((s8 >> 16) | (s9 << 5))
+	out[24] = byte(s9 >> 3)
+	out[25] = byte(s9 >> 11)
+	out[26] = byte((s9 >> 19) | (s10 << 2))
+	out[27] = byte(s10 >> 6)
+	out[28] = byte((s10 >> 14) | (s11 << 7))
+	out[29] = byte(s11 >> 1)
+	out[30] = byte(s11 >> 9)
+	out[31] = byte(s11 >> 17)
+}
diff --git a/vendor/golang.org/x/net/AUTHORS b/vendor/golang.org/x/net/AUTHORS
new file mode 100644
index 0000000..15167cd
--- /dev/null
+++ b/vendor/golang.org/x/net/AUTHORS
@@ -0,0 +1,3 @@
+# This source code refers to The Go Authors for copyright purposes.
+# The master list of authors is in the main Go distribution,
+# visible at http://tip.golang.org/AUTHORS.
diff --git a/vendor/golang.org/x/net/CONTRIBUTORS b/vendor/golang.org/x/net/CONTRIBUTORS
new file mode 100644
index 0000000..1c4577e
--- /dev/null
+++ b/vendor/golang.org/x/net/CONTRIBUTORS
@@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at http://tip.golang.org/CONTRIBUTORS.
diff --git a/vendor/golang.org/x/net/LICENSE b/vendor/golang.org/x/net/LICENSE
new file mode 100644
index 0000000..6a66aea
--- /dev/null
+++ b/vendor/golang.org/x/net/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/golang.org/x/net/PATENTS b/vendor/golang.org/x/net/PATENTS
new file mode 100644
index 0000000..7330990
--- /dev/null
+++ b/vendor/golang.org/x/net/PATENTS
@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.
diff --git a/vendor/golang.org/x/net/bpf/asm.go b/vendor/golang.org/x/net/bpf/asm.go
new file mode 100644
index 0000000..15e21b1
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/asm.go
@@ -0,0 +1,41 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bpf
+
+import "fmt"
+
+// Assemble converts insts into raw instructions suitable for loading
+// into a BPF virtual machine.
+//
+// Currently, no optimization is attempted, the assembled program flow
+// is exactly as provided.
+func Assemble(insts []Instruction) ([]RawInstruction, error) {
+	ret := make([]RawInstruction, len(insts))
+	var err error
+	for i, inst := range insts {
+		ret[i], err = inst.Assemble()
+		if err != nil {
+			return nil, fmt.Errorf("assembling instruction %d: %s", i+1, err)
+		}
+	}
+	return ret, nil
+}
+
+// Disassemble attempts to parse raw back into
+// Instructions. Unrecognized RawInstructions are assumed to be an
+// extension not implemented by this package, and are passed through
+// unchanged to the output. The allDecoded value reports whether insts
+// contains no RawInstructions.
+func Disassemble(raw []RawInstruction) (insts []Instruction, allDecoded bool) {
+	insts = make([]Instruction, len(raw))
+	allDecoded = true
+	for i, r := range raw {
+		insts[i] = r.Disassemble()
+		if _, ok := insts[i].(RawInstruction); ok {
+			allDecoded = false
+		}
+	}
+	return insts, allDecoded
+}
diff --git a/vendor/golang.org/x/net/bpf/constants.go b/vendor/golang.org/x/net/bpf/constants.go
new file mode 100644
index 0000000..b89ca35
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/constants.go
@@ -0,0 +1,218 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bpf
+
+// A Register is a register of the BPF virtual machine.
+type Register uint16
+
+const (
+	// RegA is the accumulator register. RegA is always the
+	// destination register of ALU operations.
+	RegA Register = iota
+	// RegX is the indirection register, used by LoadIndirect
+	// operations.
+	RegX
+)
+
+// An ALUOp is an arithmetic or logic operation.
+type ALUOp uint16
+
+// ALU binary operation types.
+const (
+	ALUOpAdd ALUOp = iota << 4
+	ALUOpSub
+	ALUOpMul
+	ALUOpDiv
+	ALUOpOr
+	ALUOpAnd
+	ALUOpShiftLeft
+	ALUOpShiftRight
+	aluOpNeg // Not exported because it's the only unary ALU operation, and gets its own instruction type.
+	ALUOpMod
+	ALUOpXor
+)
+
+// A JumpTest is a comparison operator used in conditional jumps.
+type JumpTest uint16
+
+// Supported operators for conditional jumps.
+const (
+	// K == A
+	JumpEqual JumpTest = iota
+	// K != A
+	JumpNotEqual
+	// K > A
+	JumpGreaterThan
+	// K < A
+	JumpLessThan
+	// K >= A
+	JumpGreaterOrEqual
+	// K <= A
+	JumpLessOrEqual
+	// K & A != 0
+	JumpBitsSet
+	// K & A == 0
+	JumpBitsNotSet
+)
+
+// An Extension is a function call provided by the kernel that
+// performs advanced operations that are expensive or impossible
+// within the BPF virtual machine.
+//
+// Extensions are only implemented by the Linux kernel.
+//
+// TODO: should we prune this list? Some of these extensions seem
+// either broken or near-impossible to use correctly, whereas other
+// (len, random, ifindex) are quite useful.
+type Extension int
+
+// Extension functions available in the Linux kernel.
+const (
+	// extOffset is the negative maximum number of instructions used
+	// to load instructions by overloading the K argument.
+	extOffset = -0x1000
+	// ExtLen returns the length of the packet.
+	ExtLen Extension = 1
+	// ExtProto returns the packet's L3 protocol type.
+	ExtProto Extension = 0
+	// ExtType returns the packet's type (skb->pkt_type in the kernel)
+	//
+	// TODO: better documentation. How nice an API do we want to
+	// provide for these esoteric extensions?
+	ExtType Extension = 4
+	// ExtPayloadOffset returns the offset of the packet payload, or
+	// the first protocol header that the kernel does not know how to
+	// parse.
+	ExtPayloadOffset Extension = 52
+	// ExtInterfaceIndex returns the index of the interface on which
+	// the packet was received.
+	ExtInterfaceIndex Extension = 8
+	// ExtNetlinkAttr returns the netlink attribute of type X at
+	// offset A.
+	ExtNetlinkAttr Extension = 12
+	// ExtNetlinkAttrNested returns the nested netlink attribute of
+	// type X at offset A.
+	ExtNetlinkAttrNested Extension = 16
+	// ExtMark returns the packet's mark value.
+	ExtMark Extension = 20
+	// ExtQueue returns the packet's assigned hardware queue.
+	ExtQueue Extension = 24
+	// ExtLinkLayerType returns the packet's hardware address type
+	// (e.g. Ethernet, Infiniband).
+	ExtLinkLayerType Extension = 28
+	// ExtRXHash returns the packets receive hash.
+	//
+	// TODO: figure out what this rxhash actually is.
+	ExtRXHash Extension = 32
+	// ExtCPUID returns the ID of the CPU processing the current
+	// packet.
+	ExtCPUID Extension = 36
+	// ExtVLANTag returns the packet's VLAN tag.
+	ExtVLANTag Extension = 44
+	// ExtVLANTagPresent returns non-zero if the packet has a VLAN
+	// tag.
+	//
+	// TODO: I think this might be a lie: it reads bit 0x1000 of the
+	// VLAN header, which changed meaning in recent revisions of the
+	// spec - this extension may now return meaningless information.
+	ExtVLANTagPresent Extension = 48
+	// ExtVLANProto returns 0x8100 if the frame has a VLAN header,
+	// 0x88a8 if the frame has a "Q-in-Q" double VLAN header, or some
+	// other value if no VLAN information is present.
+	ExtVLANProto Extension = 60
+	// ExtRand returns a uniformly random uint32.
+	ExtRand Extension = 56
+)
+
+// The following gives names to various bit patterns used in opcode construction.
+
+const (
+	opMaskCls uint16 = 0x7
+	// opClsLoad masks
+	opMaskLoadDest  = 0x01
+	opMaskLoadWidth = 0x18
+	opMaskLoadMode  = 0xe0
+	// opClsALU
+	opMaskOperandSrc = 0x08
+	opMaskOperator   = 0xf0
+	// opClsJump
+	opMaskJumpConst = 0x0f
+	opMaskJumpCond  = 0xf0
+)
+
+const (
+	// +---------------+-----------------+---+---+---+
+	// | AddrMode (3b) | LoadWidth (2b)  | 0 | 0 | 0 |
+	// +---------------+-----------------+---+---+---+
+	opClsLoadA uint16 = iota
+	// +---------------+-----------------+---+---+---+
+	// | AddrMode (3b) | LoadWidth (2b)  | 0 | 0 | 1 |
+	// +---------------+-----------------+---+---+---+
+	opClsLoadX
+	// +---+---+---+---+---+---+---+---+
+	// | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
+	// +---+---+---+---+---+---+---+---+
+	opClsStoreA
+	// +---+---+---+---+---+---+---+---+
+	// | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
+	// +---+---+---+---+---+---+---+---+
+	opClsStoreX
+	// +---------------+-----------------+---+---+---+
+	// | Operator (4b) | OperandSrc (1b) | 1 | 0 | 0 |
+	// +---------------+-----------------+---+---+---+
+	opClsALU
+	// +-----------------------------+---+---+---+---+
+	// |      TestOperator (4b)      | 0 | 1 | 0 | 1 |
+	// +-----------------------------+---+---+---+---+
+	opClsJump
+	// +---+-------------------------+---+---+---+---+
+	// | 0 | 0 | 0 |   RetSrc (1b)   | 0 | 1 | 1 | 0 |
+	// +---+-------------------------+---+---+---+---+
+	opClsReturn
+	// +---+-------------------------+---+---+---+---+
+	// | 0 | 0 | 0 |  TXAorTAX (1b)  | 0 | 1 | 1 | 1 |
+	// +---+-------------------------+---+---+---+---+
+	opClsMisc
+)
+
+const (
+	opAddrModeImmediate uint16 = iota << 5
+	opAddrModeAbsolute
+	opAddrModeIndirect
+	opAddrModeScratch
+	opAddrModePacketLen // actually an extension, not an addressing mode.
+	opAddrModeMemShift
+)
+
+const (
+	opLoadWidth4 uint16 = iota << 3
+	opLoadWidth2
+	opLoadWidth1
+)
+
+// Operator defined by ALUOp*
+
+const (
+	opALUSrcConstant uint16 = iota << 3
+	opALUSrcX
+)
+
+const (
+	opJumpAlways = iota << 4
+	opJumpEqual
+	opJumpGT
+	opJumpGE
+	opJumpSet
+)
+
+const (
+	opRetSrcConstant uint16 = iota << 4
+	opRetSrcA
+)
+
+const (
+	opMiscTAX = 0x00
+	opMiscTXA = 0x80
+)
diff --git a/vendor/golang.org/x/net/bpf/doc.go b/vendor/golang.org/x/net/bpf/doc.go
new file mode 100644
index 0000000..ae62feb
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/doc.go
@@ -0,0 +1,82 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+
+Package bpf implements marshaling and unmarshaling of programs for the
+Berkeley Packet Filter virtual machine, and provides a Go implementation
+of the virtual machine.
+
+BPF's main use is to specify a packet filter for network taps, so that
+the kernel doesn't have to expensively copy every packet it sees to
+userspace. However, it's been repurposed to other areas where running
+user code in-kernel is needed. For example, Linux's seccomp uses BPF
+to apply security policies to system calls. For simplicity, this
+documentation refers only to packets, but other uses of BPF have their
+own data payloads.
+
+BPF programs run in a restricted virtual machine. It has almost no
+access to kernel functions, and while conditional branches are
+allowed, they can only jump forwards, to guarantee that there are no
+infinite loops.
+
+The virtual machine
+
+The BPF VM is an accumulator machine. Its main register, called
+register A, is an implicit source and destination in all arithmetic
+and logic operations. The machine also has 16 scratch registers for
+temporary storage, and an indirection register (register X) for
+indirect memory access. All registers are 32 bits wide.
+
+Each run of a BPF program is given one packet, which is placed in the
+VM's read-only "main memory". LoadAbsolute and LoadIndirect
+instructions can fetch up to 32 bits at a time into register A for
+examination.
+
+The goal of a BPF program is to produce and return a verdict (uint32),
+which tells the kernel what to do with the packet. In the context of
+packet filtering, the returned value is the number of bytes of the
+packet to forward to userspace, or 0 to ignore the packet. Other
+contexts like seccomp define their own return values.
+
+In order to simplify programs, attempts to read past the end of the
+packet terminate the program execution with a verdict of 0 (ignore
+packet). This means that the vast majority of BPF programs don't need
+to do any explicit bounds checking.
+
+In addition to the bytes of the packet, some BPF programs have access
+to extensions, which are essentially calls to kernel utility
+functions. Currently, the only extensions supported by this package
+are the Linux packet filter extensions.
+
+Examples
+
+This packet filter selects all ARP packets.
+
+	bpf.Assemble([]bpf.Instruction{
+		// Load "EtherType" field from the ethernet header.
+		bpf.LoadAbsolute{Off: 12, Size: 2},
+		// Skip over the next instruction if EtherType is not ARP.
+		bpf.JumpIf{Cond: bpf.JumpNotEqual, Val: 0x0806, SkipTrue: 1},
+		// Verdict is "send up to 4k of the packet to userspace."
+		bpf.RetConstant{Val: 4096},
+		// Verdict is "ignore packet."
+		bpf.RetConstant{Val: 0},
+	})
+
+This packet filter captures a random 1% sample of traffic.
+
+	bpf.Assemble([]bpf.Instruction{
+		// Get a 32-bit random number from the Linux kernel.
+		bpf.LoadExtension{Num: bpf.ExtRand},
+		// 1% dice roll?
+		bpf.JumpIf{Cond: bpf.JumpLessThan, Val: 2^32/100, SkipFalse: 1},
+		// Capture.
+		bpf.RetConstant{Val: 4096},
+		// Ignore.
+		bpf.RetConstant{Val: 0},
+	})
+
+*/
+package bpf // import "golang.org/x/net/bpf"
diff --git a/vendor/golang.org/x/net/bpf/instructions.go b/vendor/golang.org/x/net/bpf/instructions.go
new file mode 100644
index 0000000..f9dc0e8
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/instructions.go
@@ -0,0 +1,704 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bpf
+
+import "fmt"
+
+// An Instruction is one instruction executed by the BPF virtual
+// machine.
+type Instruction interface {
+	// Assemble assembles the Instruction into a RawInstruction.
+	Assemble() (RawInstruction, error)
+}
+
+// A RawInstruction is a raw BPF virtual machine instruction.
+type RawInstruction struct {
+	// Operation to execute.
+	Op uint16
+	// For conditional jump instructions, the number of instructions
+	// to skip if the condition is true/false.
+	Jt uint8
+	Jf uint8
+	// Constant parameter. The meaning depends on the Op.
+	K uint32
+}
+
+// Assemble implements the Instruction Assemble method.
+func (ri RawInstruction) Assemble() (RawInstruction, error) { return ri, nil }
+
+// Disassemble parses ri into an Instruction and returns it. If ri is
+// not recognized by this package, ri itself is returned.
+func (ri RawInstruction) Disassemble() Instruction {
+	switch ri.Op & opMaskCls {
+	case opClsLoadA, opClsLoadX:
+		reg := Register(ri.Op & opMaskLoadDest)
+		sz := 0
+		switch ri.Op & opMaskLoadWidth {
+		case opLoadWidth4:
+			sz = 4
+		case opLoadWidth2:
+			sz = 2
+		case opLoadWidth1:
+			sz = 1
+		default:
+			return ri
+		}
+		switch ri.Op & opMaskLoadMode {
+		case opAddrModeImmediate:
+			if sz != 4 {
+				return ri
+			}
+			return LoadConstant{Dst: reg, Val: ri.K}
+		case opAddrModeScratch:
+			if sz != 4 || ri.K > 15 {
+				return ri
+			}
+			return LoadScratch{Dst: reg, N: int(ri.K)}
+		case opAddrModeAbsolute:
+			if ri.K > extOffset+0xffffffff {
+				return LoadExtension{Num: Extension(-extOffset + ri.K)}
+			}
+			return LoadAbsolute{Size: sz, Off: ri.K}
+		case opAddrModeIndirect:
+			return LoadIndirect{Size: sz, Off: ri.K}
+		case opAddrModePacketLen:
+			if sz != 4 {
+				return ri
+			}
+			return LoadExtension{Num: ExtLen}
+		case opAddrModeMemShift:
+			return LoadMemShift{Off: ri.K}
+		default:
+			return ri
+		}
+
+	case opClsStoreA:
+		if ri.Op != opClsStoreA || ri.K > 15 {
+			return ri
+		}
+		return StoreScratch{Src: RegA, N: int(ri.K)}
+
+	case opClsStoreX:
+		if ri.Op != opClsStoreX || ri.K > 15 {
+			return ri
+		}
+		return StoreScratch{Src: RegX, N: int(ri.K)}
+
+	case opClsALU:
+		switch op := ALUOp(ri.Op & opMaskOperator); op {
+		case ALUOpAdd, ALUOpSub, ALUOpMul, ALUOpDiv, ALUOpOr, ALUOpAnd, ALUOpShiftLeft, ALUOpShiftRight, ALUOpMod, ALUOpXor:
+			if ri.Op&opMaskOperandSrc != 0 {
+				return ALUOpX{Op: op}
+			}
+			return ALUOpConstant{Op: op, Val: ri.K}
+		case aluOpNeg:
+			return NegateA{}
+		default:
+			return ri
+		}
+
+	case opClsJump:
+		if ri.Op&opMaskJumpConst != opClsJump {
+			return ri
+		}
+		switch ri.Op & opMaskJumpCond {
+		case opJumpAlways:
+			return Jump{Skip: ri.K}
+		case opJumpEqual:
+			if ri.Jt == 0 {
+				return JumpIf{
+					Cond:      JumpNotEqual,
+					Val:       ri.K,
+					SkipTrue:  ri.Jf,
+					SkipFalse: 0,
+				}
+			}
+			return JumpIf{
+				Cond:      JumpEqual,
+				Val:       ri.K,
+				SkipTrue:  ri.Jt,
+				SkipFalse: ri.Jf,
+			}
+		case opJumpGT:
+			if ri.Jt == 0 {
+				return JumpIf{
+					Cond:      JumpLessOrEqual,
+					Val:       ri.K,
+					SkipTrue:  ri.Jf,
+					SkipFalse: 0,
+				}
+			}
+			return JumpIf{
+				Cond:      JumpGreaterThan,
+				Val:       ri.K,
+				SkipTrue:  ri.Jt,
+				SkipFalse: ri.Jf,
+			}
+		case opJumpGE:
+			if ri.Jt == 0 {
+				return JumpIf{
+					Cond:      JumpLessThan,
+					Val:       ri.K,
+					SkipTrue:  ri.Jf,
+					SkipFalse: 0,
+				}
+			}
+			return JumpIf{
+				Cond:      JumpGreaterOrEqual,
+				Val:       ri.K,
+				SkipTrue:  ri.Jt,
+				SkipFalse: ri.Jf,
+			}
+		case opJumpSet:
+			return JumpIf{
+				Cond:      JumpBitsSet,
+				Val:       ri.K,
+				SkipTrue:  ri.Jt,
+				SkipFalse: ri.Jf,
+			}
+		default:
+			return ri
+		}
+
+	case opClsReturn:
+		switch ri.Op {
+		case opClsReturn | opRetSrcA:
+			return RetA{}
+		case opClsReturn | opRetSrcConstant:
+			return RetConstant{Val: ri.K}
+		default:
+			return ri
+		}
+
+	case opClsMisc:
+		switch ri.Op {
+		case opClsMisc | opMiscTAX:
+			return TAX{}
+		case opClsMisc | opMiscTXA:
+			return TXA{}
+		default:
+			return ri
+		}
+
+	default:
+		panic("unreachable") // switch is exhaustive on the bit pattern
+	}
+}
+
+// LoadConstant loads Val into register Dst.
+type LoadConstant struct {
+	Dst Register
+	Val uint32
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a LoadConstant) Assemble() (RawInstruction, error) {
+	return assembleLoad(a.Dst, 4, opAddrModeImmediate, a.Val)
+}
+
+// String returns the instruction in assembler notation.
+func (a LoadConstant) String() string {
+	switch a.Dst {
+	case RegA:
+		return fmt.Sprintf("ld #%d", a.Val)
+	case RegX:
+		return fmt.Sprintf("ldx #%d", a.Val)
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// LoadScratch loads scratch[N] into register Dst.
+type LoadScratch struct {
+	Dst Register
+	N   int // 0-15
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a LoadScratch) Assemble() (RawInstruction, error) {
+	if a.N < 0 || a.N > 15 {
+		return RawInstruction{}, fmt.Errorf("invalid scratch slot %d", a.N)
+	}
+	return assembleLoad(a.Dst, 4, opAddrModeScratch, uint32(a.N))
+}
+
+// String returns the instruction in assembler notation.
+func (a LoadScratch) String() string {
+	switch a.Dst {
+	case RegA:
+		return fmt.Sprintf("ld M[%d]", a.N)
+	case RegX:
+		return fmt.Sprintf("ldx M[%d]", a.N)
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// LoadAbsolute loads packet[Off:Off+Size] as an integer value into
+// register A.
+type LoadAbsolute struct {
+	Off  uint32
+	Size int // 1, 2 or 4
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a LoadAbsolute) Assemble() (RawInstruction, error) {
+	return assembleLoad(RegA, a.Size, opAddrModeAbsolute, a.Off)
+}
+
+// String returns the instruction in assembler notation.
+func (a LoadAbsolute) String() string {
+	switch a.Size {
+	case 1: // byte
+		return fmt.Sprintf("ldb [%d]", a.Off)
+	case 2: // half word
+		return fmt.Sprintf("ldh [%d]", a.Off)
+	case 4: // word
+		if a.Off > extOffset+0xffffffff {
+			return LoadExtension{Num: Extension(a.Off + 0x1000)}.String()
+		}
+		return fmt.Sprintf("ld [%d]", a.Off)
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// LoadIndirect loads packet[X+Off:X+Off+Size] as an integer value
+// into register A.
+type LoadIndirect struct {
+	Off  uint32
+	Size int // 1, 2 or 4
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a LoadIndirect) Assemble() (RawInstruction, error) {
+	return assembleLoad(RegA, a.Size, opAddrModeIndirect, a.Off)
+}
+
+// String returns the instruction in assembler notation.
+func (a LoadIndirect) String() string {
+	switch a.Size {
+	case 1: // byte
+		return fmt.Sprintf("ldb [x + %d]", a.Off)
+	case 2: // half word
+		return fmt.Sprintf("ldh [x + %d]", a.Off)
+	case 4: // word
+		return fmt.Sprintf("ld [x + %d]", a.Off)
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// LoadMemShift multiplies the first 4 bits of the byte at packet[Off]
+// by 4 and stores the result in register X.
+//
+// This instruction is mainly useful to load into X the length of an
+// IPv4 packet header in a single instruction, rather than have to do
+// the arithmetic on the header's first byte by hand.
+type LoadMemShift struct {
+	Off uint32
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a LoadMemShift) Assemble() (RawInstruction, error) {
+	return assembleLoad(RegX, 1, opAddrModeMemShift, a.Off)
+}
+
+// String returns the instruction in assembler notation.
+func (a LoadMemShift) String() string {
+	return fmt.Sprintf("ldx 4*([%d]&0xf)", a.Off)
+}
+
+// LoadExtension invokes a linux-specific extension and stores the
+// result in register A.
+type LoadExtension struct {
+	Num Extension
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a LoadExtension) Assemble() (RawInstruction, error) {
+	if a.Num == ExtLen {
+		return assembleLoad(RegA, 4, opAddrModePacketLen, 0)
+	}
+	return assembleLoad(RegA, 4, opAddrModeAbsolute, uint32(extOffset+a.Num))
+}
+
+// String returns the instruction in assembler notation.
+func (a LoadExtension) String() string {
+	switch a.Num {
+	case ExtLen:
+		return "ld #len"
+	case ExtProto:
+		return "ld #proto"
+	case ExtType:
+		return "ld #type"
+	case ExtPayloadOffset:
+		return "ld #poff"
+	case ExtInterfaceIndex:
+		return "ld #ifidx"
+	case ExtNetlinkAttr:
+		return "ld #nla"
+	case ExtNetlinkAttrNested:
+		return "ld #nlan"
+	case ExtMark:
+		return "ld #mark"
+	case ExtQueue:
+		return "ld #queue"
+	case ExtLinkLayerType:
+		return "ld #hatype"
+	case ExtRXHash:
+		return "ld #rxhash"
+	case ExtCPUID:
+		return "ld #cpu"
+	case ExtVLANTag:
+		return "ld #vlan_tci"
+	case ExtVLANTagPresent:
+		return "ld #vlan_avail"
+	case ExtVLANProto:
+		return "ld #vlan_tpid"
+	case ExtRand:
+		return "ld #rand"
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// StoreScratch stores register Src into scratch[N].
+type StoreScratch struct {
+	Src Register
+	N   int // 0-15
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a StoreScratch) Assemble() (RawInstruction, error) {
+	if a.N < 0 || a.N > 15 {
+		return RawInstruction{}, fmt.Errorf("invalid scratch slot %d", a.N)
+	}
+	var op uint16
+	switch a.Src {
+	case RegA:
+		op = opClsStoreA
+	case RegX:
+		op = opClsStoreX
+	default:
+		return RawInstruction{}, fmt.Errorf("invalid source register %v", a.Src)
+	}
+
+	return RawInstruction{
+		Op: op,
+		K:  uint32(a.N),
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a StoreScratch) String() string {
+	switch a.Src {
+	case RegA:
+		return fmt.Sprintf("st M[%d]", a.N)
+	case RegX:
+		return fmt.Sprintf("stx M[%d]", a.N)
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// ALUOpConstant executes A = A <Op> Val.
+type ALUOpConstant struct {
+	Op  ALUOp
+	Val uint32
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a ALUOpConstant) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsALU | opALUSrcConstant | uint16(a.Op),
+		K:  a.Val,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a ALUOpConstant) String() string {
+	switch a.Op {
+	case ALUOpAdd:
+		return fmt.Sprintf("add #%d", a.Val)
+	case ALUOpSub:
+		return fmt.Sprintf("sub #%d", a.Val)
+	case ALUOpMul:
+		return fmt.Sprintf("mul #%d", a.Val)
+	case ALUOpDiv:
+		return fmt.Sprintf("div #%d", a.Val)
+	case ALUOpMod:
+		return fmt.Sprintf("mod #%d", a.Val)
+	case ALUOpAnd:
+		return fmt.Sprintf("and #%d", a.Val)
+	case ALUOpOr:
+		return fmt.Sprintf("or #%d", a.Val)
+	case ALUOpXor:
+		return fmt.Sprintf("xor #%d", a.Val)
+	case ALUOpShiftLeft:
+		return fmt.Sprintf("lsh #%d", a.Val)
+	case ALUOpShiftRight:
+		return fmt.Sprintf("rsh #%d", a.Val)
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// ALUOpX executes A = A <Op> X
+type ALUOpX struct {
+	Op ALUOp
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a ALUOpX) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsALU | opALUSrcX | uint16(a.Op),
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a ALUOpX) String() string {
+	switch a.Op {
+	case ALUOpAdd:
+		return "add x"
+	case ALUOpSub:
+		return "sub x"
+	case ALUOpMul:
+		return "mul x"
+	case ALUOpDiv:
+		return "div x"
+	case ALUOpMod:
+		return "mod x"
+	case ALUOpAnd:
+		return "and x"
+	case ALUOpOr:
+		return "or x"
+	case ALUOpXor:
+		return "xor x"
+	case ALUOpShiftLeft:
+		return "lsh x"
+	case ALUOpShiftRight:
+		return "rsh x"
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+// NegateA executes A = -A.
+type NegateA struct{}
+
+// Assemble implements the Instruction Assemble method.
+func (a NegateA) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsALU | uint16(aluOpNeg),
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a NegateA) String() string {
+	return fmt.Sprintf("neg")
+}
+
+// Jump skips the following Skip instructions in the program.
+type Jump struct {
+	Skip uint32
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a Jump) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsJump | opJumpAlways,
+		K:  a.Skip,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a Jump) String() string {
+	return fmt.Sprintf("ja %d", a.Skip)
+}
+
+// JumpIf skips the following Skip instructions in the program if A
+// <Cond> Val is true.
+type JumpIf struct {
+	Cond      JumpTest
+	Val       uint32
+	SkipTrue  uint8
+	SkipFalse uint8
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a JumpIf) Assemble() (RawInstruction, error) {
+	var (
+		cond uint16
+		flip bool
+	)
+	switch a.Cond {
+	case JumpEqual:
+		cond = opJumpEqual
+	case JumpNotEqual:
+		cond, flip = opJumpEqual, true
+	case JumpGreaterThan:
+		cond = opJumpGT
+	case JumpLessThan:
+		cond, flip = opJumpGE, true
+	case JumpGreaterOrEqual:
+		cond = opJumpGE
+	case JumpLessOrEqual:
+		cond, flip = opJumpGT, true
+	case JumpBitsSet:
+		cond = opJumpSet
+	case JumpBitsNotSet:
+		cond, flip = opJumpSet, true
+	default:
+		return RawInstruction{}, fmt.Errorf("unknown JumpTest %v", a.Cond)
+	}
+	jt, jf := a.SkipTrue, a.SkipFalse
+	if flip {
+		jt, jf = jf, jt
+	}
+	return RawInstruction{
+		Op: opClsJump | cond,
+		Jt: jt,
+		Jf: jf,
+		K:  a.Val,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a JumpIf) String() string {
+	switch a.Cond {
+	// K == A
+	case JumpEqual:
+		return conditionalJump(a, "jeq", "jneq")
+	// K != A
+	case JumpNotEqual:
+		return fmt.Sprintf("jneq #%d,%d", a.Val, a.SkipTrue)
+	// K > A
+	case JumpGreaterThan:
+		return conditionalJump(a, "jgt", "jle")
+	// K < A
+	case JumpLessThan:
+		return fmt.Sprintf("jlt #%d,%d", a.Val, a.SkipTrue)
+	// K >= A
+	case JumpGreaterOrEqual:
+		return conditionalJump(a, "jge", "jlt")
+	// K <= A
+	case JumpLessOrEqual:
+		return fmt.Sprintf("jle #%d,%d", a.Val, a.SkipTrue)
+	// K & A != 0
+	case JumpBitsSet:
+		if a.SkipFalse > 0 {
+			return fmt.Sprintf("jset #%d,%d,%d", a.Val, a.SkipTrue, a.SkipFalse)
+		}
+		return fmt.Sprintf("jset #%d,%d", a.Val, a.SkipTrue)
+	// K & A == 0, there is no assembler instruction for JumpBitNotSet, use JumpBitSet and invert skips
+	case JumpBitsNotSet:
+		return JumpIf{Cond: JumpBitsSet, SkipTrue: a.SkipFalse, SkipFalse: a.SkipTrue, Val: a.Val}.String()
+	default:
+		return fmt.Sprintf("unknown instruction: %#v", a)
+	}
+}
+
+func conditionalJump(inst JumpIf, positiveJump, negativeJump string) string {
+	if inst.SkipTrue > 0 {
+		if inst.SkipFalse > 0 {
+			return fmt.Sprintf("%s #%d,%d,%d", positiveJump, inst.Val, inst.SkipTrue, inst.SkipFalse)
+		}
+		return fmt.Sprintf("%s #%d,%d", positiveJump, inst.Val, inst.SkipTrue)
+	}
+	return fmt.Sprintf("%s #%d,%d", negativeJump, inst.Val, inst.SkipFalse)
+}
+
+// RetA exits the BPF program, returning the value of register A.
+type RetA struct{}
+
+// Assemble implements the Instruction Assemble method.
+func (a RetA) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsReturn | opRetSrcA,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a RetA) String() string {
+	return fmt.Sprintf("ret a")
+}
+
+// RetConstant exits the BPF program, returning a constant value.
+type RetConstant struct {
+	Val uint32
+}
+
+// Assemble implements the Instruction Assemble method.
+func (a RetConstant) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsReturn | opRetSrcConstant,
+		K:  a.Val,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a RetConstant) String() string {
+	return fmt.Sprintf("ret #%d", a.Val)
+}
+
+// TXA copies the value of register X to register A.
+type TXA struct{}
+
+// Assemble implements the Instruction Assemble method.
+func (a TXA) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsMisc | opMiscTXA,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a TXA) String() string {
+	return fmt.Sprintf("txa")
+}
+
+// TAX copies the value of register A to register X.
+type TAX struct{}
+
+// Assemble implements the Instruction Assemble method.
+func (a TAX) Assemble() (RawInstruction, error) {
+	return RawInstruction{
+		Op: opClsMisc | opMiscTAX,
+	}, nil
+}
+
+// String returns the instruction in assembler notation.
+func (a TAX) String() string {
+	return fmt.Sprintf("tax")
+}
+
+func assembleLoad(dst Register, loadSize int, mode uint16, k uint32) (RawInstruction, error) {
+	var (
+		cls uint16
+		sz  uint16
+	)
+	switch dst {
+	case RegA:
+		cls = opClsLoadA
+	case RegX:
+		cls = opClsLoadX
+	default:
+		return RawInstruction{}, fmt.Errorf("invalid target register %v", dst)
+	}
+	switch loadSize {
+	case 1:
+		sz = opLoadWidth1
+	case 2:
+		sz = opLoadWidth2
+	case 4:
+		sz = opLoadWidth4
+	default:
+		return RawInstruction{}, fmt.Errorf("invalid load byte length %d", sz)
+	}
+	return RawInstruction{
+		Op: cls | sz | mode,
+		K:  k,
+	}, nil
+}
diff --git a/vendor/golang.org/x/net/bpf/setter.go b/vendor/golang.org/x/net/bpf/setter.go
new file mode 100644
index 0000000..43e35f0
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/setter.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bpf
+
+// A Setter is a type which can attach a compiled BPF filter to itself.
+type Setter interface {
+	SetBPF(filter []RawInstruction) error
+}
diff --git a/vendor/golang.org/x/net/bpf/vm.go b/vendor/golang.org/x/net/bpf/vm.go
new file mode 100644
index 0000000..4c656f1
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/vm.go
@@ -0,0 +1,140 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bpf
+
+import (
+	"errors"
+	"fmt"
+)
+
+// A VM is an emulated BPF virtual machine.
+type VM struct {
+	filter []Instruction
+}
+
+// NewVM returns a new VM using the input BPF program.
+func NewVM(filter []Instruction) (*VM, error) {
+	if len(filter) == 0 {
+		return nil, errors.New("one or more Instructions must be specified")
+	}
+
+	for i, ins := range filter {
+		check := len(filter) - (i + 1)
+		switch ins := ins.(type) {
+		// Check for out-of-bounds jumps in instructions
+		case Jump:
+			if check <= int(ins.Skip) {
+				return nil, fmt.Errorf("cannot jump %d instructions; jumping past program bounds", ins.Skip)
+			}
+		case JumpIf:
+			if check <= int(ins.SkipTrue) {
+				return nil, fmt.Errorf("cannot jump %d instructions in true case; jumping past program bounds", ins.SkipTrue)
+			}
+			if check <= int(ins.SkipFalse) {
+				return nil, fmt.Errorf("cannot jump %d instructions in false case; jumping past program bounds", ins.SkipFalse)
+			}
+		// Check for division or modulus by zero
+		case ALUOpConstant:
+			if ins.Val != 0 {
+				break
+			}
+
+			switch ins.Op {
+			case ALUOpDiv, ALUOpMod:
+				return nil, errors.New("cannot divide by zero using ALUOpConstant")
+			}
+		// Check for unknown extensions
+		case LoadExtension:
+			switch ins.Num {
+			case ExtLen:
+			default:
+				return nil, fmt.Errorf("extension %d not implemented", ins.Num)
+			}
+		}
+	}
+
+	// Make sure last instruction is a return instruction
+	switch filter[len(filter)-1].(type) {
+	case RetA, RetConstant:
+	default:
+		return nil, errors.New("BPF program must end with RetA or RetConstant")
+	}
+
+	// Though our VM works using disassembled instructions, we
+	// attempt to assemble the input filter anyway to ensure it is compatible
+	// with an operating system VM.
+	_, err := Assemble(filter)
+
+	return &VM{
+		filter: filter,
+	}, err
+}
+
+// Run runs the VM's BPF program against the input bytes.
+// Run returns the number of bytes accepted by the BPF program, and any errors
+// which occurred while processing the program.
+func (v *VM) Run(in []byte) (int, error) {
+	var (
+		// Registers of the virtual machine
+		regA       uint32
+		regX       uint32
+		regScratch [16]uint32
+
+		// OK is true if the program should continue processing the next
+		// instruction, or false if not, causing the loop to break
+		ok = true
+	)
+
+	// TODO(mdlayher): implement:
+	// - NegateA:
+	//   - would require a change from uint32 registers to int32
+	//     registers
+
+	// TODO(mdlayher): add interop tests that check signedness of ALU
+	// operations against kernel implementation, and make sure Go
+	// implementation matches behavior
+
+	for i := 0; i < len(v.filter) && ok; i++ {
+		ins := v.filter[i]
+
+		switch ins := ins.(type) {
+		case ALUOpConstant:
+			regA = aluOpConstant(ins, regA)
+		case ALUOpX:
+			regA, ok = aluOpX(ins, regA, regX)
+		case Jump:
+			i += int(ins.Skip)
+		case JumpIf:
+			jump := jumpIf(ins, regA)
+			i += jump
+		case LoadAbsolute:
+			regA, ok = loadAbsolute(ins, in)
+		case LoadConstant:
+			regA, regX = loadConstant(ins, regA, regX)
+		case LoadExtension:
+			regA = loadExtension(ins, in)
+		case LoadIndirect:
+			regA, ok = loadIndirect(ins, in, regX)
+		case LoadMemShift:
+			regX, ok = loadMemShift(ins, in)
+		case LoadScratch:
+			regA, regX = loadScratch(ins, regScratch, regA, regX)
+		case RetA:
+			return int(regA), nil
+		case RetConstant:
+			return int(ins.Val), nil
+		case StoreScratch:
+			regScratch = storeScratch(ins, regScratch, regA, regX)
+		case TAX:
+			regX = regA
+		case TXA:
+			regA = regX
+		default:
+			return 0, fmt.Errorf("unknown Instruction at index %d: %T", i, ins)
+		}
+	}
+
+	return 0, nil
+}
diff --git a/vendor/golang.org/x/net/bpf/vm_instructions.go b/vendor/golang.org/x/net/bpf/vm_instructions.go
new file mode 100644
index 0000000..516f946
--- /dev/null
+++ b/vendor/golang.org/x/net/bpf/vm_instructions.go
@@ -0,0 +1,174 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bpf
+
+import (
+	"encoding/binary"
+	"fmt"
+)
+
+func aluOpConstant(ins ALUOpConstant, regA uint32) uint32 {
+	return aluOpCommon(ins.Op, regA, ins.Val)
+}
+
+func aluOpX(ins ALUOpX, regA uint32, regX uint32) (uint32, bool) {
+	// Guard against division or modulus by zero by terminating
+	// the program, as the OS BPF VM does
+	if regX == 0 {
+		switch ins.Op {
+		case ALUOpDiv, ALUOpMod:
+			return 0, false
+		}
+	}
+
+	return aluOpCommon(ins.Op, regA, regX), true
+}
+
+func aluOpCommon(op ALUOp, regA uint32, value uint32) uint32 {
+	switch op {
+	case ALUOpAdd:
+		return regA + value
+	case ALUOpSub:
+		return regA - value
+	case ALUOpMul:
+		return regA * value
+	case ALUOpDiv:
+		// Division by zero not permitted by NewVM and aluOpX checks
+		return regA / value
+	case ALUOpOr:
+		return regA | value
+	case ALUOpAnd:
+		return regA & value
+	case ALUOpShiftLeft:
+		return regA << value
+	case ALUOpShiftRight:
+		return regA >> value
+	case ALUOpMod:
+		// Modulus by zero not permitted by NewVM and aluOpX checks
+		return regA % value
+	case ALUOpXor:
+		return regA ^ value
+	default:
+		return regA
+	}
+}
+
+func jumpIf(ins JumpIf, value uint32) int {
+	var ok bool
+	inV := uint32(ins.Val)
+
+	switch ins.Cond {
+	case JumpEqual:
+		ok = value == inV
+	case JumpNotEqual:
+		ok = value != inV
+	case JumpGreaterThan:
+		ok = value > inV
+	case JumpLessThan:
+		ok = value < inV
+	case JumpGreaterOrEqual:
+		ok = value >= inV
+	case JumpLessOrEqual:
+		ok = value <= inV
+	case JumpBitsSet:
+		ok = (value & inV) != 0
+	case JumpBitsNotSet:
+		ok = (value & inV) == 0
+	}
+
+	if ok {
+		return int(ins.SkipTrue)
+	}
+
+	return int(ins.SkipFalse)
+}
+
+func loadAbsolute(ins LoadAbsolute, in []byte) (uint32, bool) {
+	offset := int(ins.Off)
+	size := int(ins.Size)
+
+	return loadCommon(in, offset, size)
+}
+
+func loadConstant(ins LoadConstant, regA uint32, regX uint32) (uint32, uint32) {
+	switch ins.Dst {
+	case RegA:
+		regA = ins.Val
+	case RegX:
+		regX = ins.Val
+	}
+
+	return regA, regX
+}
+
+func loadExtension(ins LoadExtension, in []byte) uint32 {
+	switch ins.Num {
+	case ExtLen:
+		return uint32(len(in))
+	default:
+		panic(fmt.Sprintf("unimplemented extension: %d", ins.Num))
+	}
+}
+
+func loadIndirect(ins LoadIndirect, in []byte, regX uint32) (uint32, bool) {
+	offset := int(ins.Off) + int(regX)
+	size := int(ins.Size)
+
+	return loadCommon(in, offset, size)
+}
+
+func loadMemShift(ins LoadMemShift, in []byte) (uint32, bool) {
+	offset := int(ins.Off)
+
+	if !inBounds(len(in), offset, 0) {
+		return 0, false
+	}
+
+	// Mask off high 4 bits and multiply low 4 bits by 4
+	return uint32(in[offset]&0x0f) * 4, true
+}
+
+func inBounds(inLen int, offset int, size int) bool {
+	return offset+size <= inLen
+}
+
+func loadCommon(in []byte, offset int, size int) (uint32, bool) {
+	if !inBounds(len(in), offset, size) {
+		return 0, false
+	}
+
+	switch size {
+	case 1:
+		return uint32(in[offset]), true
+	case 2:
+		return uint32(binary.BigEndian.Uint16(in[offset : offset+size])), true
+	case 4:
+		return uint32(binary.BigEndian.Uint32(in[offset : offset+size])), true
+	default:
+		panic(fmt.Sprintf("invalid load size: %d", size))
+	}
+}
+
+func loadScratch(ins LoadScratch, regScratch [16]uint32, regA uint32, regX uint32) (uint32, uint32) {
+	switch ins.Dst {
+	case RegA:
+		regA = regScratch[ins.N]
+	case RegX:
+		regX = regScratch[ins.N]
+	}
+
+	return regA, regX
+}
+
+func storeScratch(ins StoreScratch, regScratch [16]uint32, regA uint32, regX uint32) [16]uint32 {
+	switch ins.Src {
+	case RegA:
+		regScratch[ins.N] = regA
+	case RegX:
+		regScratch[ins.N] = regX
+	}
+
+	return regScratch
+}
diff --git a/vendor/golang.org/x/net/internal/iana/const.go b/vendor/golang.org/x/net/internal/iana/const.go
new file mode 100644
index 0000000..c9df24d
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/iana/const.go
@@ -0,0 +1,180 @@
+// go generate gen.go
+// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
+
+// Package iana provides protocol number resources managed by the Internet Assigned Numbers Authority (IANA).
+package iana // import "golang.org/x/net/internal/iana"
+
+// Differentiated Services Field Codepoints (DSCP), Updated: 2017-05-12
+const (
+	DiffServCS0        = 0x0  // CS0
+	DiffServCS1        = 0x20 // CS1
+	DiffServCS2        = 0x40 // CS2
+	DiffServCS3        = 0x60 // CS3
+	DiffServCS4        = 0x80 // CS4
+	DiffServCS5        = 0xa0 // CS5
+	DiffServCS6        = 0xc0 // CS6
+	DiffServCS7        = 0xe0 // CS7
+	DiffServAF11       = 0x28 // AF11
+	DiffServAF12       = 0x30 // AF12
+	DiffServAF13       = 0x38 // AF13
+	DiffServAF21       = 0x48 // AF21
+	DiffServAF22       = 0x50 // AF22
+	DiffServAF23       = 0x58 // AF23
+	DiffServAF31       = 0x68 // AF31
+	DiffServAF32       = 0x70 // AF32
+	DiffServAF33       = 0x78 // AF33
+	DiffServAF41       = 0x88 // AF41
+	DiffServAF42       = 0x90 // AF42
+	DiffServAF43       = 0x98 // AF43
+	DiffServEF         = 0xb8 // EF
+	DiffServVOICEADMIT = 0xb0 // VOICE-ADMIT
+)
+
+// IPv4 TOS Byte and IPv6 Traffic Class Octet, Updated: 2001-09-06
+const (
+	NotECNTransport       = 0x0 // Not-ECT (Not ECN-Capable Transport)
+	ECNTransport1         = 0x1 // ECT(1) (ECN-Capable Transport(1))
+	ECNTransport0         = 0x2 // ECT(0) (ECN-Capable Transport(0))
+	CongestionExperienced = 0x3 // CE (Congestion Experienced)
+)
+
+// Protocol Numbers, Updated: 2016-06-22
+const (
+	ProtocolIP             = 0   // IPv4 encapsulation, pseudo protocol number
+	ProtocolHOPOPT         = 0   // IPv6 Hop-by-Hop Option
+	ProtocolICMP           = 1   // Internet Control Message
+	ProtocolIGMP           = 2   // Internet Group Management
+	ProtocolGGP            = 3   // Gateway-to-Gateway
+	ProtocolIPv4           = 4   // IPv4 encapsulation
+	ProtocolST             = 5   // Stream
+	ProtocolTCP            = 6   // Transmission Control
+	ProtocolCBT            = 7   // CBT
+	ProtocolEGP            = 8   // Exterior Gateway Protocol
+	ProtocolIGP            = 9   // any private interior gateway (used by Cisco for their IGRP)
+	ProtocolBBNRCCMON      = 10  // BBN RCC Monitoring
+	ProtocolNVPII          = 11  // Network Voice Protocol
+	ProtocolPUP            = 12  // PUP
+	ProtocolEMCON          = 14  // EMCON
+	ProtocolXNET           = 15  // Cross Net Debugger
+	ProtocolCHAOS          = 16  // Chaos
+	ProtocolUDP            = 17  // User Datagram
+	ProtocolMUX            = 18  // Multiplexing
+	ProtocolDCNMEAS        = 19  // DCN Measurement Subsystems
+	ProtocolHMP            = 20  // Host Monitoring
+	ProtocolPRM            = 21  // Packet Radio Measurement
+	ProtocolXNSIDP         = 22  // XEROX NS IDP
+	ProtocolTRUNK1         = 23  // Trunk-1
+	ProtocolTRUNK2         = 24  // Trunk-2
+	ProtocolLEAF1          = 25  // Leaf-1
+	ProtocolLEAF2          = 26  // Leaf-2
+	ProtocolRDP            = 27  // Reliable Data Protocol
+	ProtocolIRTP           = 28  // Internet Reliable Transaction
+	ProtocolISOTP4         = 29  // ISO Transport Protocol Class 4
+	ProtocolNETBLT         = 30  // Bulk Data Transfer Protocol
+	ProtocolMFENSP         = 31  // MFE Network Services Protocol
+	ProtocolMERITINP       = 32  // MERIT Internodal Protocol
+	ProtocolDCCP           = 33  // Datagram Congestion Control Protocol
+	Protocol3PC            = 34  // Third Party Connect Protocol
+	ProtocolIDPR           = 35  // Inter-Domain Policy Routing Protocol
+	ProtocolXTP            = 36  // XTP
+	ProtocolDDP            = 37  // Datagram Delivery Protocol
+	ProtocolIDPRCMTP       = 38  // IDPR Control Message Transport Proto
+	ProtocolTPPP           = 39  // TP++ Transport Protocol
+	ProtocolIL             = 40  // IL Transport Protocol
+	ProtocolIPv6           = 41  // IPv6 encapsulation
+	ProtocolSDRP           = 42  // Source Demand Routing Protocol
+	ProtocolIPv6Route      = 43  // Routing Header for IPv6
+	ProtocolIPv6Frag       = 44  // Fragment Header for IPv6
+	ProtocolIDRP           = 45  // Inter-Domain Routing Protocol
+	ProtocolRSVP           = 46  // Reservation Protocol
+	ProtocolGRE            = 47  // Generic Routing Encapsulation
+	ProtocolDSR            = 48  // Dynamic Source Routing Protocol
+	ProtocolBNA            = 49  // BNA
+	ProtocolESP            = 50  // Encap Security Payload
+	ProtocolAH             = 51  // Authentication Header
+	ProtocolINLSP          = 52  // Integrated Net Layer Security  TUBA
+	ProtocolNARP           = 54  // NBMA Address Resolution Protocol
+	ProtocolMOBILE         = 55  // IP Mobility
+	ProtocolTLSP           = 56  // Transport Layer Security Protocol using Kryptonet key management
+	ProtocolSKIP           = 57  // SKIP
+	ProtocolIPv6ICMP       = 58  // ICMP for IPv6
+	ProtocolIPv6NoNxt      = 59  // No Next Header for IPv6
+	ProtocolIPv6Opts       = 60  // Destination Options for IPv6
+	ProtocolCFTP           = 62  // CFTP
+	ProtocolSATEXPAK       = 64  // SATNET and Backroom EXPAK
+	ProtocolKRYPTOLAN      = 65  // Kryptolan
+	ProtocolRVD            = 66  // MIT Remote Virtual Disk Protocol
+	ProtocolIPPC           = 67  // Internet Pluribus Packet Core
+	ProtocolSATMON         = 69  // SATNET Monitoring
+	ProtocolVISA           = 70  // VISA Protocol
+	ProtocolIPCV           = 71  // Internet Packet Core Utility
+	ProtocolCPNX           = 72  // Computer Protocol Network Executive
+	ProtocolCPHB           = 73  // Computer Protocol Heart Beat
+	ProtocolWSN            = 74  // Wang Span Network
+	ProtocolPVP            = 75  // Packet Video Protocol
+	ProtocolBRSATMON       = 76  // Backroom SATNET Monitoring
+	ProtocolSUNND          = 77  // SUN ND PROTOCOL-Temporary
+	ProtocolWBMON          = 78  // WIDEBAND Monitoring
+	ProtocolWBEXPAK        = 79  // WIDEBAND EXPAK
+	ProtocolISOIP          = 80  // ISO Internet Protocol
+	ProtocolVMTP           = 81  // VMTP
+	ProtocolSECUREVMTP     = 82  // SECURE-VMTP
+	ProtocolVINES          = 83  // VINES
+	ProtocolTTP            = 84  // Transaction Transport Protocol
+	ProtocolIPTM           = 84  // Internet Protocol Traffic Manager
+	ProtocolNSFNETIGP      = 85  // NSFNET-IGP
+	ProtocolDGP            = 86  // Dissimilar Gateway Protocol
+	ProtocolTCF            = 87  // TCF
+	ProtocolEIGRP          = 88  // EIGRP
+	ProtocolOSPFIGP        = 89  // OSPFIGP
+	ProtocolSpriteRPC      = 90  // Sprite RPC Protocol
+	ProtocolLARP           = 91  // Locus Address Resolution Protocol
+	ProtocolMTP            = 92  // Multicast Transport Protocol
+	ProtocolAX25           = 93  // AX.25 Frames
+	ProtocolIPIP           = 94  // IP-within-IP Encapsulation Protocol
+	ProtocolSCCSP          = 96  // Semaphore Communications Sec. Pro.
+	ProtocolETHERIP        = 97  // Ethernet-within-IP Encapsulation
+	ProtocolENCAP          = 98  // Encapsulation Header
+	ProtocolGMTP           = 100 // GMTP
+	ProtocolIFMP           = 101 // Ipsilon Flow Management Protocol
+	ProtocolPNNI           = 102 // PNNI over IP
+	ProtocolPIM            = 103 // Protocol Independent Multicast
+	ProtocolARIS           = 104 // ARIS
+	ProtocolSCPS           = 105 // SCPS
+	ProtocolQNX            = 106 // QNX
+	ProtocolAN             = 107 // Active Networks
+	ProtocolIPComp         = 108 // IP Payload Compression Protocol
+	ProtocolSNP            = 109 // Sitara Networks Protocol
+	ProtocolCompaqPeer     = 110 // Compaq Peer Protocol
+	ProtocolIPXinIP        = 111 // IPX in IP
+	ProtocolVRRP           = 112 // Virtual Router Redundancy Protocol
+	ProtocolPGM            = 113 // PGM Reliable Transport Protocol
+	ProtocolL2TP           = 115 // Layer Two Tunneling Protocol
+	ProtocolDDX            = 116 // D-II Data Exchange (DDX)
+	ProtocolIATP           = 117 // Interactive Agent Transfer Protocol
+	ProtocolSTP            = 118 // Schedule Transfer Protocol
+	ProtocolSRP            = 119 // SpectraLink Radio Protocol
+	ProtocolUTI            = 120 // UTI
+	ProtocolSMP            = 121 // Simple Message Protocol
+	ProtocolPTP            = 123 // Performance Transparency Protocol
+	ProtocolISIS           = 124 // ISIS over IPv4
+	ProtocolFIRE           = 125 // FIRE
+	ProtocolCRTP           = 126 // Combat Radio Transport Protocol
+	ProtocolCRUDP          = 127 // Combat Radio User Datagram
+	ProtocolSSCOPMCE       = 128 // SSCOPMCE
+	ProtocolIPLT           = 129 // IPLT
+	ProtocolSPS            = 130 // Secure Packet Shield
+	ProtocolPIPE           = 131 // Private IP Encapsulation within IP
+	ProtocolSCTP           = 132 // Stream Control Transmission Protocol
+	ProtocolFC             = 133 // Fibre Channel
+	ProtocolRSVPE2EIGNORE  = 134 // RSVP-E2E-IGNORE
+	ProtocolMobilityHeader = 135 // Mobility Header
+	ProtocolUDPLite        = 136 // UDPLite
+	ProtocolMPLSinIP       = 137 // MPLS-in-IP
+	ProtocolMANET          = 138 // MANET Protocols
+	ProtocolHIP            = 139 // Host Identity Protocol
+	ProtocolShim6          = 140 // Shim6 Protocol
+	ProtocolWESP           = 141 // Wrapped Encapsulating Security Payload
+	ProtocolROHC           = 142 // Robust Header Compression
+	ProtocolReserved       = 255 // Reserved
+)
diff --git a/vendor/golang.org/x/net/internal/iana/gen.go b/vendor/golang.org/x/net/internal/iana/gen.go
new file mode 100644
index 0000000..2a5c310
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/iana/gen.go
@@ -0,0 +1,293 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+//go:generate go run gen.go
+
+// This program generates internet protocol constants and tables by
+// reading IANA protocol registries.
+package main
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"go/format"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+)
+
+var registries = []struct {
+	url   string
+	parse func(io.Writer, io.Reader) error
+}{
+	{
+		"https://www.iana.org/assignments/dscp-registry/dscp-registry.xml",
+		parseDSCPRegistry,
+	},
+	{
+		"https://www.iana.org/assignments/ipv4-tos-byte/ipv4-tos-byte.xml",
+		parseTOSTCByte,
+	},
+	{
+		"https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml",
+		parseProtocolNumbers,
+	},
+}
+
+func main() {
+	var bb bytes.Buffer
+	fmt.Fprintf(&bb, "// go generate gen.go\n")
+	fmt.Fprintf(&bb, "// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n")
+	fmt.Fprintf(&bb, "// Package iana provides protocol number resources managed by the Internet Assigned Numbers Authority (IANA).\n")
+	fmt.Fprintf(&bb, `package iana // import "golang.org/x/net/internal/iana"`+"\n\n")
+	for _, r := range registries {
+		resp, err := http.Get(r.url)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			fmt.Fprintf(os.Stderr, "got HTTP status code %v for %v\n", resp.StatusCode, r.url)
+			os.Exit(1)
+		}
+		if err := r.parse(&bb, resp.Body); err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+		fmt.Fprintf(&bb, "\n")
+	}
+	b, err := format.Source(bb.Bytes())
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	if err := ioutil.WriteFile("const.go", b, 0644); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func parseDSCPRegistry(w io.Writer, r io.Reader) error {
+	dec := xml.NewDecoder(r)
+	var dr dscpRegistry
+	if err := dec.Decode(&dr); err != nil {
+		return err
+	}
+	drs := dr.escape()
+	fmt.Fprintf(w, "// %s, Updated: %s\n", dr.Title, dr.Updated)
+	fmt.Fprintf(w, "const (\n")
+	for _, dr := range drs {
+		fmt.Fprintf(w, "DiffServ%s = %#x", dr.Name, dr.Value)
+		fmt.Fprintf(w, "// %s\n", dr.OrigName)
+	}
+	fmt.Fprintf(w, ")\n")
+	return nil
+}
+
+type dscpRegistry struct {
+	XMLName     xml.Name `xml:"registry"`
+	Title       string   `xml:"title"`
+	Updated     string   `xml:"updated"`
+	Note        string   `xml:"note"`
+	RegTitle    string   `xml:"registry>title"`
+	PoolRecords []struct {
+		Name  string `xml:"name"`
+		Space string `xml:"space"`
+	} `xml:"registry>record"`
+	Records []struct {
+		Name  string `xml:"name"`
+		Space string `xml:"space"`
+	} `xml:"registry>registry>record"`
+}
+
+type canonDSCPRecord struct {
+	OrigName string
+	Name     string
+	Value    int
+}
+
+func (drr *dscpRegistry) escape() []canonDSCPRecord {
+	drs := make([]canonDSCPRecord, len(drr.Records))
+	sr := strings.NewReplacer(
+		"+", "",
+		"-", "",
+		"/", "",
+		".", "",
+		" ", "",
+	)
+	for i, dr := range drr.Records {
+		s := strings.TrimSpace(dr.Name)
+		drs[i].OrigName = s
+		drs[i].Name = sr.Replace(s)
+		n, err := strconv.ParseUint(dr.Space, 2, 8)
+		if err != nil {
+			continue
+		}
+		drs[i].Value = int(n) << 2
+	}
+	return drs
+}
+
+func parseTOSTCByte(w io.Writer, r io.Reader) error {
+	dec := xml.NewDecoder(r)
+	var ttb tosTCByte
+	if err := dec.Decode(&ttb); err != nil {
+		return err
+	}
+	trs := ttb.escape()
+	fmt.Fprintf(w, "// %s, Updated: %s\n", ttb.Title, ttb.Updated)
+	fmt.Fprintf(w, "const (\n")
+	for _, tr := range trs {
+		fmt.Fprintf(w, "%s = %#x", tr.Keyword, tr.Value)
+		fmt.Fprintf(w, "// %s\n", tr.OrigKeyword)
+	}
+	fmt.Fprintf(w, ")\n")
+	return nil
+}
+
+type tosTCByte struct {
+	XMLName  xml.Name `xml:"registry"`
+	Title    string   `xml:"title"`
+	Updated  string   `xml:"updated"`
+	Note     string   `xml:"note"`
+	RegTitle string   `xml:"registry>title"`
+	Records  []struct {
+		Binary  string `xml:"binary"`
+		Keyword string `xml:"keyword"`
+	} `xml:"registry>record"`
+}
+
+type canonTOSTCByteRecord struct {
+	OrigKeyword string
+	Keyword     string
+	Value       int
+}
+
+func (ttb *tosTCByte) escape() []canonTOSTCByteRecord {
+	trs := make([]canonTOSTCByteRecord, len(ttb.Records))
+	sr := strings.NewReplacer(
+		"Capable", "",
+		"(", "",
+		")", "",
+		"+", "",
+		"-", "",
+		"/", "",
+		".", "",
+		" ", "",
+	)
+	for i, tr := range ttb.Records {
+		s := strings.TrimSpace(tr.Keyword)
+		trs[i].OrigKeyword = s
+		ss := strings.Split(s, " ")
+		if len(ss) > 1 {
+			trs[i].Keyword = strings.Join(ss[1:], " ")
+		} else {
+			trs[i].Keyword = ss[0]
+		}
+		trs[i].Keyword = sr.Replace(trs[i].Keyword)
+		n, err := strconv.ParseUint(tr.Binary, 2, 8)
+		if err != nil {
+			continue
+		}
+		trs[i].Value = int(n)
+	}
+	return trs
+}
+
+func parseProtocolNumbers(w io.Writer, r io.Reader) error {
+	dec := xml.NewDecoder(r)
+	var pn protocolNumbers
+	if err := dec.Decode(&pn); err != nil {
+		return err
+	}
+	prs := pn.escape()
+	prs = append([]canonProtocolRecord{{
+		Name:  "IP",
+		Descr: "IPv4 encapsulation, pseudo protocol number",
+		Value: 0,
+	}}, prs...)
+	fmt.Fprintf(w, "// %s, Updated: %s\n", pn.Title, pn.Updated)
+	fmt.Fprintf(w, "const (\n")
+	for _, pr := range prs {
+		if pr.Name == "" {
+			continue
+		}
+		fmt.Fprintf(w, "Protocol%s = %d", pr.Name, pr.Value)
+		s := pr.Descr
+		if s == "" {
+			s = pr.OrigName
+		}
+		fmt.Fprintf(w, "// %s\n", s)
+	}
+	fmt.Fprintf(w, ")\n")
+	return nil
+}
+
+type protocolNumbers struct {
+	XMLName  xml.Name `xml:"registry"`
+	Title    string   `xml:"title"`
+	Updated  string   `xml:"updated"`
+	RegTitle string   `xml:"registry>title"`
+	Note     string   `xml:"registry>note"`
+	Records  []struct {
+		Value string `xml:"value"`
+		Name  string `xml:"name"`
+		Descr string `xml:"description"`
+	} `xml:"registry>record"`
+}
+
+type canonProtocolRecord struct {
+	OrigName string
+	Name     string
+	Descr    string
+	Value    int
+}
+
+func (pn *protocolNumbers) escape() []canonProtocolRecord {
+	prs := make([]canonProtocolRecord, len(pn.Records))
+	sr := strings.NewReplacer(
+		"-in-", "in",
+		"-within-", "within",
+		"-over-", "over",
+		"+", "P",
+		"-", "",
+		"/", "",
+		".", "",
+		" ", "",
+	)
+	for i, pr := range pn.Records {
+		if strings.Contains(pr.Name, "Deprecated") ||
+			strings.Contains(pr.Name, "deprecated") {
+			continue
+		}
+		prs[i].OrigName = pr.Name
+		s := strings.TrimSpace(pr.Name)
+		switch pr.Name {
+		case "ISIS over IPv4":
+			prs[i].Name = "ISIS"
+		case "manet":
+			prs[i].Name = "MANET"
+		default:
+			prs[i].Name = sr.Replace(s)
+		}
+		ss := strings.Split(pr.Descr, "\n")
+		for i := range ss {
+			ss[i] = strings.TrimSpace(ss[i])
+		}
+		if len(ss) > 1 {
+			prs[i].Descr = strings.Join(ss, " ")
+		} else {
+			prs[i].Descr = ss[0]
+		}
+		prs[i].Value, _ = strconv.Atoi(pr.Value)
+	}
+	return prs
+}
diff --git a/vendor/golang.org/x/net/internal/socket/cmsghdr.go b/vendor/golang.org/x/net/internal/socket/cmsghdr.go
new file mode 100644
index 0000000..1eb07d2
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/cmsghdr.go
@@ -0,0 +1,11 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package socket
+
+func (h *cmsghdr) len() int { return int(h.Len) }
+func (h *cmsghdr) lvl() int { return int(h.Level) }
+func (h *cmsghdr) typ() int { return int(h.Type) }
diff --git a/vendor/golang.org/x/net/internal/socket/cmsghdr_bsd.go b/vendor/golang.org/x/net/internal/socket/cmsghdr_bsd.go
new file mode 100644
index 0000000..d1d0c2d
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/cmsghdr_bsd.go
@@ -0,0 +1,13 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package socket
+
+func (h *cmsghdr) set(l, lvl, typ int) {
+	h.Len = uint32(l)
+	h.Level = int32(lvl)
+	h.Type = int32(typ)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/cmsghdr_linux_32bit.go b/vendor/golang.org/x/net/internal/socket/cmsghdr_linux_32bit.go
new file mode 100644
index 0000000..bac6681
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/cmsghdr_linux_32bit.go
@@ -0,0 +1,14 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm mips mipsle 386
+// +build linux
+
+package socket
+
+func (h *cmsghdr) set(l, lvl, typ int) {
+	h.Len = uint32(l)
+	h.Level = int32(lvl)
+	h.Type = int32(typ)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/cmsghdr_linux_64bit.go b/vendor/golang.org/x/net/internal/socket/cmsghdr_linux_64bit.go
new file mode 100644
index 0000000..63f0534
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/cmsghdr_linux_64bit.go
@@ -0,0 +1,14 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm64 amd64 ppc64 ppc64le mips64 mips64le s390x
+// +build linux
+
+package socket
+
+func (h *cmsghdr) set(l, lvl, typ int) {
+	h.Len = uint64(l)
+	h.Level = int32(lvl)
+	h.Type = int32(typ)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/cmsghdr_solaris_64bit.go b/vendor/golang.org/x/net/internal/socket/cmsghdr_solaris_64bit.go
new file mode 100644
index 0000000..7dedd43
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/cmsghdr_solaris_64bit.go
@@ -0,0 +1,14 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build amd64
+// +build solaris
+
+package socket
+
+func (h *cmsghdr) set(l, lvl, typ int) {
+	h.Len = uint32(l)
+	h.Level = int32(lvl)
+	h.Type = int32(typ)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/cmsghdr_stub.go b/vendor/golang.org/x/net/internal/socket/cmsghdr_stub.go
new file mode 100644
index 0000000..a4e7122
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/cmsghdr_stub.go
@@ -0,0 +1,17 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris
+
+package socket
+
+type cmsghdr struct{}
+
+const sizeofCmsghdr = 0
+
+func (h *cmsghdr) len() int { return 0 }
+func (h *cmsghdr) lvl() int { return 0 }
+func (h *cmsghdr) typ() int { return 0 }
+
+func (h *cmsghdr) set(l, lvl, typ int) {}
diff --git a/vendor/golang.org/x/net/internal/socket/defs_darwin.go b/vendor/golang.org/x/net/internal/socket/defs_darwin.go
new file mode 100644
index 0000000..14e28c0
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_darwin.go
@@ -0,0 +1,44 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/defs_dragonfly.go b/vendor/golang.org/x/net/internal/socket/defs_dragonfly.go
new file mode 100644
index 0000000..14e28c0
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_dragonfly.go
@@ -0,0 +1,44 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/defs_freebsd.go b/vendor/golang.org/x/net/internal/socket/defs_freebsd.go
new file mode 100644
index 0000000..14e28c0
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_freebsd.go
@@ -0,0 +1,44 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/defs_linux.go b/vendor/golang.org/x/net/internal/socket/defs_linux.go
new file mode 100644
index 0000000..ce9ec2f
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_linux.go
@@ -0,0 +1,49 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <linux/in.h>
+#include <linux/in6.h>
+
+#define _GNU_SOURCE
+#include <sys/socket.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type mmsghdr C.struct_mmsghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofMmsghdr = C.sizeof_struct_mmsghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/defs_netbsd.go b/vendor/golang.org/x/net/internal/socket/defs_netbsd.go
new file mode 100644
index 0000000..3f84335
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_netbsd.go
@@ -0,0 +1,47 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type mmsghdr C.struct_mmsghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofMmsghdr = C.sizeof_struct_mmsghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/defs_openbsd.go b/vendor/golang.org/x/net/internal/socket/defs_openbsd.go
new file mode 100644
index 0000000..14e28c0
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_openbsd.go
@@ -0,0 +1,44 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/defs_solaris.go b/vendor/golang.org/x/net/internal/socket/defs_solaris.go
new file mode 100644
index 0000000..14e28c0
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/defs_solaris.go
@@ -0,0 +1,44 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package socket
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysAF_UNSPEC = C.AF_UNSPEC
+	sysAF_INET   = C.AF_INET
+	sysAF_INET6  = C.AF_INET6
+
+	sysSOCK_RAW = C.SOCK_RAW
+)
+
+type iovec C.struct_iovec
+
+type msghdr C.struct_msghdr
+
+type cmsghdr C.struct_cmsghdr
+
+type sockaddrInet C.struct_sockaddr_in
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+const (
+	sizeofIovec   = C.sizeof_struct_iovec
+	sizeofMsghdr  = C.sizeof_struct_msghdr
+	sizeofCmsghdr = C.sizeof_struct_cmsghdr
+
+	sizeofSockaddrInet  = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/error_unix.go b/vendor/golang.org/x/net/internal/socket/error_unix.go
new file mode 100644
index 0000000..93dff91
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/error_unix.go
@@ -0,0 +1,31 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package socket
+
+import "syscall"
+
+var (
+	errEAGAIN error = syscall.EAGAIN
+	errEINVAL error = syscall.EINVAL
+	errENOENT error = syscall.ENOENT
+)
+
+// errnoErr returns common boxed Errno values, to prevent allocations
+// at runtime.
+func errnoErr(errno syscall.Errno) error {
+	switch errno {
+	case 0:
+		return nil
+	case syscall.EAGAIN:
+		return errEAGAIN
+	case syscall.EINVAL:
+		return errEINVAL
+	case syscall.ENOENT:
+		return errENOENT
+	}
+	return errno
+}
diff --git a/vendor/golang.org/x/net/internal/socket/error_windows.go b/vendor/golang.org/x/net/internal/socket/error_windows.go
new file mode 100644
index 0000000..6a6379a
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/error_windows.go
@@ -0,0 +1,26 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import "syscall"
+
+var (
+	errERROR_IO_PENDING error = syscall.ERROR_IO_PENDING
+	errEINVAL           error = syscall.EINVAL
+)
+
+// errnoErr returns common boxed Errno values, to prevent allocations
+// at runtime.
+func errnoErr(errno syscall.Errno) error {
+	switch errno {
+	case 0:
+		return nil
+	case syscall.ERROR_IO_PENDING:
+		return errERROR_IO_PENDING
+	case syscall.EINVAL:
+		return errEINVAL
+	}
+	return errno
+}
diff --git a/vendor/golang.org/x/net/internal/socket/iovec_32bit.go b/vendor/golang.org/x/net/internal/socket/iovec_32bit.go
new file mode 100644
index 0000000..05d6082
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/iovec_32bit.go
@@ -0,0 +1,19 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm mips mipsle 386
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package socket
+
+import "unsafe"
+
+func (v *iovec) set(b []byte) {
+	l := len(b)
+	if l == 0 {
+		return
+	}
+	v.Base = (*byte)(unsafe.Pointer(&b[0]))
+	v.Len = uint32(l)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/iovec_64bit.go b/vendor/golang.org/x/net/internal/socket/iovec_64bit.go
new file mode 100644
index 0000000..afb34ad
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/iovec_64bit.go
@@ -0,0 +1,19 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm64 amd64 ppc64 ppc64le mips64 mips64le s390x
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package socket
+
+import "unsafe"
+
+func (v *iovec) set(b []byte) {
+	l := len(b)
+	if l == 0 {
+		return
+	}
+	v.Base = (*byte)(unsafe.Pointer(&b[0]))
+	v.Len = uint64(l)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/iovec_solaris_64bit.go b/vendor/golang.org/x/net/internal/socket/iovec_solaris_64bit.go
new file mode 100644
index 0000000..8d17a40
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/iovec_solaris_64bit.go
@@ -0,0 +1,19 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build amd64
+// +build solaris
+
+package socket
+
+import "unsafe"
+
+func (v *iovec) set(b []byte) {
+	l := len(b)
+	if l == 0 {
+		return
+	}
+	v.Base = (*int8)(unsafe.Pointer(&b[0]))
+	v.Len = uint64(l)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/iovec_stub.go b/vendor/golang.org/x/net/internal/socket/iovec_stub.go
new file mode 100644
index 0000000..c87d2a9
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/iovec_stub.go
@@ -0,0 +1,11 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris
+
+package socket
+
+type iovec struct{}
+
+func (v *iovec) set(b []byte) {}
diff --git a/vendor/golang.org/x/net/internal/socket/mmsghdr_stub.go b/vendor/golang.org/x/net/internal/socket/mmsghdr_stub.go
new file mode 100644
index 0000000..2e80a9c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/mmsghdr_stub.go
@@ -0,0 +1,21 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !linux,!netbsd
+
+package socket
+
+import "net"
+
+type mmsghdr struct{}
+
+type mmsghdrs []mmsghdr
+
+func (hs mmsghdrs) pack(ms []Message, parseFn func([]byte, string) (net.Addr, error), marshalFn func(net.Addr) []byte) error {
+	return nil
+}
+
+func (hs mmsghdrs) unpack(ms []Message, parseFn func([]byte, string) (net.Addr, error), hint string) error {
+	return nil
+}
diff --git a/vendor/golang.org/x/net/internal/socket/mmsghdr_unix.go b/vendor/golang.org/x/net/internal/socket/mmsghdr_unix.go
new file mode 100644
index 0000000..3c42ea7
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/mmsghdr_unix.go
@@ -0,0 +1,42 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux netbsd
+
+package socket
+
+import "net"
+
+type mmsghdrs []mmsghdr
+
+func (hs mmsghdrs) pack(ms []Message, parseFn func([]byte, string) (net.Addr, error), marshalFn func(net.Addr) []byte) error {
+	for i := range hs {
+		vs := make([]iovec, len(ms[i].Buffers))
+		var sa []byte
+		if parseFn != nil {
+			sa = make([]byte, sizeofSockaddrInet6)
+		}
+		if marshalFn != nil {
+			sa = marshalFn(ms[i].Addr)
+		}
+		hs[i].Hdr.pack(vs, ms[i].Buffers, ms[i].OOB, sa)
+	}
+	return nil
+}
+
+func (hs mmsghdrs) unpack(ms []Message, parseFn func([]byte, string) (net.Addr, error), hint string) error {
+	for i := range hs {
+		ms[i].N = int(hs[i].Len)
+		ms[i].NN = hs[i].Hdr.controllen()
+		ms[i].Flags = hs[i].Hdr.flags()
+		if parseFn != nil {
+			var err error
+			ms[i].Addr, err = parseFn(hs[i].Hdr.name(), hint)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_bsd.go b/vendor/golang.org/x/net/internal/socket/msghdr_bsd.go
new file mode 100644
index 0000000..5567afc
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_bsd.go
@@ -0,0 +1,39 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package socket
+
+import "unsafe"
+
+func (h *msghdr) pack(vs []iovec, bs [][]byte, oob []byte, sa []byte) {
+	for i := range vs {
+		vs[i].set(bs[i])
+	}
+	h.setIov(vs)
+	if len(oob) > 0 {
+		h.Control = (*byte)(unsafe.Pointer(&oob[0]))
+		h.Controllen = uint32(len(oob))
+	}
+	if sa != nil {
+		h.Name = (*byte)(unsafe.Pointer(&sa[0]))
+		h.Namelen = uint32(len(sa))
+	}
+}
+
+func (h *msghdr) name() []byte {
+	if h.Name != nil && h.Namelen > 0 {
+		return (*[sizeofSockaddrInet6]byte)(unsafe.Pointer(h.Name))[:h.Namelen]
+	}
+	return nil
+}
+
+func (h *msghdr) controllen() int {
+	return int(h.Controllen)
+}
+
+func (h *msghdr) flags() int {
+	return int(h.Flags)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_bsdvar.go b/vendor/golang.org/x/net/internal/socket/msghdr_bsdvar.go
new file mode 100644
index 0000000..b8c87b7
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_bsdvar.go
@@ -0,0 +1,16 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd
+
+package socket
+
+func (h *msghdr) setIov(vs []iovec) {
+	l := len(vs)
+	if l == 0 {
+		return
+	}
+	h.Iov = &vs[0]
+	h.Iovlen = int32(l)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_linux.go b/vendor/golang.org/x/net/internal/socket/msghdr_linux.go
new file mode 100644
index 0000000..5a38798
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_linux.go
@@ -0,0 +1,36 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import "unsafe"
+
+func (h *msghdr) pack(vs []iovec, bs [][]byte, oob []byte, sa []byte) {
+	for i := range vs {
+		vs[i].set(bs[i])
+	}
+	h.setIov(vs)
+	if len(oob) > 0 {
+		h.setControl(oob)
+	}
+	if sa != nil {
+		h.Name = (*byte)(unsafe.Pointer(&sa[0]))
+		h.Namelen = uint32(len(sa))
+	}
+}
+
+func (h *msghdr) name() []byte {
+	if h.Name != nil && h.Namelen > 0 {
+		return (*[sizeofSockaddrInet6]byte)(unsafe.Pointer(h.Name))[:h.Namelen]
+	}
+	return nil
+}
+
+func (h *msghdr) controllen() int {
+	return int(h.Controllen)
+}
+
+func (h *msghdr) flags() int {
+	return int(h.Flags)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_linux_32bit.go b/vendor/golang.org/x/net/internal/socket/msghdr_linux_32bit.go
new file mode 100644
index 0000000..a7a5987
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_linux_32bit.go
@@ -0,0 +1,24 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm mips mipsle 386
+// +build linux
+
+package socket
+
+import "unsafe"
+
+func (h *msghdr) setIov(vs []iovec) {
+	l := len(vs)
+	if l == 0 {
+		return
+	}
+	h.Iov = &vs[0]
+	h.Iovlen = uint32(l)
+}
+
+func (h *msghdr) setControl(b []byte) {
+	h.Control = (*byte)(unsafe.Pointer(&b[0]))
+	h.Controllen = uint32(len(b))
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_linux_64bit.go b/vendor/golang.org/x/net/internal/socket/msghdr_linux_64bit.go
new file mode 100644
index 0000000..610fc4f
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_linux_64bit.go
@@ -0,0 +1,24 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build arm64 amd64 ppc64 ppc64le mips64 mips64le s390x
+// +build linux
+
+package socket
+
+import "unsafe"
+
+func (h *msghdr) setIov(vs []iovec) {
+	l := len(vs)
+	if l == 0 {
+		return
+	}
+	h.Iov = &vs[0]
+	h.Iovlen = uint64(l)
+}
+
+func (h *msghdr) setControl(b []byte) {
+	h.Control = (*byte)(unsafe.Pointer(&b[0]))
+	h.Controllen = uint64(len(b))
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_openbsd.go b/vendor/golang.org/x/net/internal/socket/msghdr_openbsd.go
new file mode 100644
index 0000000..71a69e2
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_openbsd.go
@@ -0,0 +1,14 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+func (h *msghdr) setIov(vs []iovec) {
+	l := len(vs)
+	if l == 0 {
+		return
+	}
+	h.Iov = &vs[0]
+	h.Iovlen = uint32(l)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_solaris_64bit.go b/vendor/golang.org/x/net/internal/socket/msghdr_solaris_64bit.go
new file mode 100644
index 0000000..6465b20
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_solaris_64bit.go
@@ -0,0 +1,36 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build amd64
+// +build solaris
+
+package socket
+
+import "unsafe"
+
+func (h *msghdr) pack(vs []iovec, bs [][]byte, oob []byte, sa []byte) {
+	for i := range vs {
+		vs[i].set(bs[i])
+	}
+	if len(vs) > 0 {
+		h.Iov = &vs[0]
+		h.Iovlen = int32(len(vs))
+	}
+	if len(oob) > 0 {
+		h.Accrights = (*int8)(unsafe.Pointer(&oob[0]))
+		h.Accrightslen = int32(len(oob))
+	}
+	if sa != nil {
+		h.Name = (*byte)(unsafe.Pointer(&sa[0]))
+		h.Namelen = uint32(len(sa))
+	}
+}
+
+func (h *msghdr) controllen() int {
+	return int(h.Accrightslen)
+}
+
+func (h *msghdr) flags() int {
+	return int(NativeEndian.Uint32(h.Pad_cgo_2[:]))
+}
diff --git a/vendor/golang.org/x/net/internal/socket/msghdr_stub.go b/vendor/golang.org/x/net/internal/socket/msghdr_stub.go
new file mode 100644
index 0000000..64e8173
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/msghdr_stub.go
@@ -0,0 +1,14 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris
+
+package socket
+
+type msghdr struct{}
+
+func (h *msghdr) pack(vs []iovec, bs [][]byte, oob []byte, sa []byte) {}
+func (h *msghdr) name() []byte                                        { return nil }
+func (h *msghdr) controllen() int                                     { return 0 }
+func (h *msghdr) flags() int                                          { return 0 }
diff --git a/vendor/golang.org/x/net/internal/socket/rawconn.go b/vendor/golang.org/x/net/internal/socket/rawconn.go
new file mode 100644
index 0000000..d6871d5
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/rawconn.go
@@ -0,0 +1,66 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+
+package socket
+
+import (
+	"errors"
+	"net"
+	"os"
+	"syscall"
+)
+
+// A Conn represents a raw connection.
+type Conn struct {
+	network string
+	c       syscall.RawConn
+}
+
+// NewConn returns a new raw connection.
+func NewConn(c net.Conn) (*Conn, error) {
+	var err error
+	var cc Conn
+	switch c := c.(type) {
+	case *net.TCPConn:
+		cc.network = "tcp"
+		cc.c, err = c.SyscallConn()
+	case *net.UDPConn:
+		cc.network = "udp"
+		cc.c, err = c.SyscallConn()
+	case *net.IPConn:
+		cc.network = "ip"
+		cc.c, err = c.SyscallConn()
+	default:
+		return nil, errors.New("unknown connection type")
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &cc, nil
+}
+
+func (o *Option) get(c *Conn, b []byte) (int, error) {
+	var operr error
+	var n int
+	fn := func(s uintptr) {
+		n, operr = getsockopt(s, o.Level, o.Name, b)
+	}
+	if err := c.c.Control(fn); err != nil {
+		return 0, err
+	}
+	return n, os.NewSyscallError("getsockopt", operr)
+}
+
+func (o *Option) set(c *Conn, b []byte) error {
+	var operr error
+	fn := func(s uintptr) {
+		operr = setsockopt(s, o.Level, o.Name, b)
+	}
+	if err := c.c.Control(fn); err != nil {
+		return err
+	}
+	return os.NewSyscallError("setsockopt", operr)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/rawconn_mmsg.go b/vendor/golang.org/x/net/internal/socket/rawconn_mmsg.go
new file mode 100644
index 0000000..499164a
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/rawconn_mmsg.go
@@ -0,0 +1,74 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build linux
+
+package socket
+
+import (
+	"net"
+	"os"
+	"syscall"
+)
+
+func (c *Conn) recvMsgs(ms []Message, flags int) (int, error) {
+	hs := make(mmsghdrs, len(ms))
+	var parseFn func([]byte, string) (net.Addr, error)
+	if c.network != "tcp" {
+		parseFn = parseInetAddr
+	}
+	if err := hs.pack(ms, parseFn, nil); err != nil {
+		return 0, err
+	}
+	var operr error
+	var n int
+	fn := func(s uintptr) bool {
+		n, operr = recvmmsg(s, hs, flags)
+		if operr == syscall.EAGAIN {
+			return false
+		}
+		return true
+	}
+	if err := c.c.Read(fn); err != nil {
+		return n, err
+	}
+	if operr != nil {
+		return n, os.NewSyscallError("recvmmsg", operr)
+	}
+	if err := hs[:n].unpack(ms[:n], parseFn, c.network); err != nil {
+		return n, err
+	}
+	return n, nil
+}
+
+func (c *Conn) sendMsgs(ms []Message, flags int) (int, error) {
+	hs := make(mmsghdrs, len(ms))
+	var marshalFn func(net.Addr) []byte
+	if c.network != "tcp" {
+		marshalFn = marshalInetAddr
+	}
+	if err := hs.pack(ms, nil, marshalFn); err != nil {
+		return 0, err
+	}
+	var operr error
+	var n int
+	fn := func(s uintptr) bool {
+		n, operr = sendmmsg(s, hs, flags)
+		if operr == syscall.EAGAIN {
+			return false
+		}
+		return true
+	}
+	if err := c.c.Write(fn); err != nil {
+		return n, err
+	}
+	if operr != nil {
+		return n, os.NewSyscallError("sendmmsg", operr)
+	}
+	if err := hs[:n].unpack(ms[:n], nil, ""); err != nil {
+		return n, err
+	}
+	return n, nil
+}
diff --git a/vendor/golang.org/x/net/internal/socket/rawconn_msg.go b/vendor/golang.org/x/net/internal/socket/rawconn_msg.go
new file mode 100644
index 0000000..b21d2e6
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/rawconn_msg.go
@@ -0,0 +1,77 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package socket
+
+import (
+	"os"
+	"syscall"
+)
+
+func (c *Conn) recvMsg(m *Message, flags int) error {
+	var h msghdr
+	vs := make([]iovec, len(m.Buffers))
+	var sa []byte
+	if c.network != "tcp" {
+		sa = make([]byte, sizeofSockaddrInet6)
+	}
+	h.pack(vs, m.Buffers, m.OOB, sa)
+	var operr error
+	var n int
+	fn := func(s uintptr) bool {
+		n, operr = recvmsg(s, &h, flags)
+		if operr == syscall.EAGAIN {
+			return false
+		}
+		return true
+	}
+	if err := c.c.Read(fn); err != nil {
+		return err
+	}
+	if operr != nil {
+		return os.NewSyscallError("recvmsg", operr)
+	}
+	if c.network != "tcp" {
+		var err error
+		m.Addr, err = parseInetAddr(sa[:], c.network)
+		if err != nil {
+			return err
+		}
+	}
+	m.N = n
+	m.NN = h.controllen()
+	m.Flags = h.flags()
+	return nil
+}
+
+func (c *Conn) sendMsg(m *Message, flags int) error {
+	var h msghdr
+	vs := make([]iovec, len(m.Buffers))
+	var sa []byte
+	if m.Addr != nil {
+		sa = marshalInetAddr(m.Addr)
+	}
+	h.pack(vs, m.Buffers, m.OOB, sa)
+	var operr error
+	var n int
+	fn := func(s uintptr) bool {
+		n, operr = sendmsg(s, &h, flags)
+		if operr == syscall.EAGAIN {
+			return false
+		}
+		return true
+	}
+	if err := c.c.Write(fn); err != nil {
+		return err
+	}
+	if operr != nil {
+		return os.NewSyscallError("sendmsg", operr)
+	}
+	m.N = n
+	m.NN = len(m.OOB)
+	return nil
+}
diff --git a/vendor/golang.org/x/net/internal/socket/rawconn_nommsg.go b/vendor/golang.org/x/net/internal/socket/rawconn_nommsg.go
new file mode 100644
index 0000000..f78832a
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/rawconn_nommsg.go
@@ -0,0 +1,18 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build !linux
+
+package socket
+
+import "errors"
+
+func (c *Conn) recvMsgs(ms []Message, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func (c *Conn) sendMsgs(ms []Message, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/rawconn_nomsg.go b/vendor/golang.org/x/net/internal/socket/rawconn_nomsg.go
new file mode 100644
index 0000000..96733cb
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/rawconn_nomsg.go
@@ -0,0 +1,18 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package socket
+
+import "errors"
+
+func (c *Conn) recvMsg(m *Message, flags int) error {
+	return errors.New("not implemented")
+}
+
+func (c *Conn) sendMsg(m *Message, flags int) error {
+	return errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/rawconn_stub.go b/vendor/golang.org/x/net/internal/socket/rawconn_stub.go
new file mode 100644
index 0000000..d2add1a
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/rawconn_stub.go
@@ -0,0 +1,25 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.9
+
+package socket
+
+import "errors"
+
+func (c *Conn) recvMsg(m *Message, flags int) error {
+	return errors.New("not implemented")
+}
+
+func (c *Conn) sendMsg(m *Message, flags int) error {
+	return errors.New("not implemented")
+}
+
+func (c *Conn) recvMsgs(ms []Message, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func (c *Conn) sendMsgs(ms []Message, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/reflect.go b/vendor/golang.org/x/net/internal/socket/reflect.go
new file mode 100644
index 0000000..bb179f1
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/reflect.go
@@ -0,0 +1,62 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.9
+
+package socket
+
+import (
+	"errors"
+	"net"
+	"os"
+	"reflect"
+	"runtime"
+)
+
+// A Conn represents a raw connection.
+type Conn struct {
+	c net.Conn
+}
+
+// NewConn returns a new raw connection.
+func NewConn(c net.Conn) (*Conn, error) {
+	return &Conn{c: c}, nil
+}
+
+func (o *Option) get(c *Conn, b []byte) (int, error) {
+	s, err := socketOf(c.c)
+	if err != nil {
+		return 0, err
+	}
+	n, err := getsockopt(s, o.Level, o.Name, b)
+	return n, os.NewSyscallError("getsockopt", err)
+}
+
+func (o *Option) set(c *Conn, b []byte) error {
+	s, err := socketOf(c.c)
+	if err != nil {
+		return err
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, o.Level, o.Name, b))
+}
+
+func socketOf(c net.Conn) (uintptr, error) {
+	switch c.(type) {
+	case *net.TCPConn, *net.UDPConn, *net.IPConn:
+		v := reflect.ValueOf(c)
+		switch e := v.Elem(); e.Kind() {
+		case reflect.Struct:
+			fd := e.FieldByName("conn").FieldByName("fd")
+			switch e := fd.Elem(); e.Kind() {
+			case reflect.Struct:
+				sysfd := e.FieldByName("sysfd")
+				if runtime.GOOS == "windows" {
+					return uintptr(sysfd.Uint()), nil
+				}
+				return uintptr(sysfd.Int()), nil
+			}
+		}
+	}
+	return 0, errors.New("invalid type")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/socket.go b/vendor/golang.org/x/net/internal/socket/socket.go
new file mode 100644
index 0000000..5f9730e
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/socket.go
@@ -0,0 +1,285 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package socket provides a portable interface for socket system
+// calls.
+package socket // import "golang.org/x/net/internal/socket"
+
+import (
+	"errors"
+	"net"
+	"unsafe"
+)
+
+// An Option represents a sticky socket option.
+type Option struct {
+	Level int // level
+	Name  int // name; must be equal or greater than 1
+	Len   int // length of value in bytes; must be equal or greater than 1
+}
+
+// Get reads a value for the option from the kernel.
+// It returns the number of bytes written into b.
+func (o *Option) Get(c *Conn, b []byte) (int, error) {
+	if o.Name < 1 || o.Len < 1 {
+		return 0, errors.New("invalid option")
+	}
+	if len(b) < o.Len {
+		return 0, errors.New("short buffer")
+	}
+	return o.get(c, b)
+}
+
+// GetInt returns an integer value for the option.
+//
+// The Len field of Option must be either 1 or 4.
+func (o *Option) GetInt(c *Conn) (int, error) {
+	if o.Len != 1 && o.Len != 4 {
+		return 0, errors.New("invalid option")
+	}
+	var b []byte
+	var bb [4]byte
+	if o.Len == 1 {
+		b = bb[:1]
+	} else {
+		b = bb[:4]
+	}
+	n, err := o.get(c, b)
+	if err != nil {
+		return 0, err
+	}
+	if n != o.Len {
+		return 0, errors.New("invalid option length")
+	}
+	if o.Len == 1 {
+		return int(b[0]), nil
+	}
+	return int(NativeEndian.Uint32(b[:4])), nil
+}
+
+// Set writes the option and value to the kernel.
+func (o *Option) Set(c *Conn, b []byte) error {
+	if o.Name < 1 || o.Len < 1 {
+		return errors.New("invalid option")
+	}
+	if len(b) < o.Len {
+		return errors.New("short buffer")
+	}
+	return o.set(c, b)
+}
+
+// SetInt writes the option and value to the kernel.
+//
+// The Len field of Option must be either 1 or 4.
+func (o *Option) SetInt(c *Conn, v int) error {
+	if o.Len != 1 && o.Len != 4 {
+		return errors.New("invalid option")
+	}
+	var b []byte
+	if o.Len == 1 {
+		b = []byte{byte(v)}
+	} else {
+		var bb [4]byte
+		NativeEndian.PutUint32(bb[:o.Len], uint32(v))
+		b = bb[:4]
+	}
+	return o.set(c, b)
+}
+
+func controlHeaderLen() int {
+	return roundup(sizeofCmsghdr)
+}
+
+func controlMessageLen(dataLen int) int {
+	return roundup(sizeofCmsghdr) + dataLen
+}
+
+// ControlMessageSpace returns the whole length of control message.
+func ControlMessageSpace(dataLen int) int {
+	return roundup(sizeofCmsghdr) + roundup(dataLen)
+}
+
+// A ControlMessage represents the head message in a stream of control
+// messages.
+//
+// A control message comprises of a header, data and a few padding
+// fields to conform to the interface to the kernel.
+//
+// See RFC 3542 for further information.
+type ControlMessage []byte
+
+// Data returns the data field of the control message at the head on
+// m.
+func (m ControlMessage) Data(dataLen int) []byte {
+	l := controlHeaderLen()
+	if len(m) < l || len(m) < l+dataLen {
+		return nil
+	}
+	return m[l : l+dataLen]
+}
+
+// Next returns the control message at the next on m.
+//
+// Next works only for standard control messages.
+func (m ControlMessage) Next(dataLen int) ControlMessage {
+	l := ControlMessageSpace(dataLen)
+	if len(m) < l {
+		return nil
+	}
+	return m[l:]
+}
+
+// MarshalHeader marshals the header fields of the control message at
+// the head on m.
+func (m ControlMessage) MarshalHeader(lvl, typ, dataLen int) error {
+	if len(m) < controlHeaderLen() {
+		return errors.New("short message")
+	}
+	h := (*cmsghdr)(unsafe.Pointer(&m[0]))
+	h.set(controlMessageLen(dataLen), lvl, typ)
+	return nil
+}
+
+// ParseHeader parses and returns the header fields of the control
+// message at the head on m.
+func (m ControlMessage) ParseHeader() (lvl, typ, dataLen int, err error) {
+	l := controlHeaderLen()
+	if len(m) < l {
+		return 0, 0, 0, errors.New("short message")
+	}
+	h := (*cmsghdr)(unsafe.Pointer(&m[0]))
+	return h.lvl(), h.typ(), int(uint64(h.len()) - uint64(l)), nil
+}
+
+// Marshal marshals the control message at the head on m, and returns
+// the next control message.
+func (m ControlMessage) Marshal(lvl, typ int, data []byte) (ControlMessage, error) {
+	l := len(data)
+	if len(m) < ControlMessageSpace(l) {
+		return nil, errors.New("short message")
+	}
+	h := (*cmsghdr)(unsafe.Pointer(&m[0]))
+	h.set(controlMessageLen(l), lvl, typ)
+	if l > 0 {
+		copy(m.Data(l), data)
+	}
+	return m.Next(l), nil
+}
+
+// Parse parses m as a single or multiple control messages.
+//
+// Parse works for both standard and compatible messages.
+func (m ControlMessage) Parse() ([]ControlMessage, error) {
+	var ms []ControlMessage
+	for len(m) >= controlHeaderLen() {
+		h := (*cmsghdr)(unsafe.Pointer(&m[0]))
+		l := h.len()
+		if l <= 0 {
+			return nil, errors.New("invalid header length")
+		}
+		if uint64(l) < uint64(controlHeaderLen()) {
+			return nil, errors.New("invalid message length")
+		}
+		if uint64(l) > uint64(len(m)) {
+			return nil, errors.New("short buffer")
+		}
+		// On message reception:
+		//
+		// |<- ControlMessageSpace --------------->|
+		// |<- controlMessageLen ---------->|      |
+		// |<- controlHeaderLen ->|         |      |
+		// +---------------+------+---------+------+
+		// |    Header     | PadH |  Data   | PadD |
+		// +---------------+------+---------+------+
+		//
+		// On compatible message reception:
+		//
+		// | ... |<- controlMessageLen ----------->|
+		// | ... |<- controlHeaderLen ->|          |
+		// +-----+---------------+------+----------+
+		// | ... |    Header     | PadH |   Data   |
+		// +-----+---------------+------+----------+
+		ms = append(ms, ControlMessage(m[:l]))
+		ll := l - controlHeaderLen()
+		if len(m) >= ControlMessageSpace(ll) {
+			m = m[ControlMessageSpace(ll):]
+		} else {
+			m = m[controlMessageLen(ll):]
+		}
+	}
+	return ms, nil
+}
+
+// NewControlMessage returns a new stream of control messages.
+func NewControlMessage(dataLen []int) ControlMessage {
+	var l int
+	for i := range dataLen {
+		l += ControlMessageSpace(dataLen[i])
+	}
+	return make([]byte, l)
+}
+
+// A Message represents an IO message.
+type Message struct {
+	// When writing, the Buffers field must contain at least one
+	// byte to write.
+	// When reading, the Buffers field will always contain a byte
+	// to read.
+	Buffers [][]byte
+
+	// OOB contains protocol-specific control or miscellaneous
+	// ancillary data known as out-of-band data.
+	OOB []byte
+
+	// Addr specifies a destination address when writing.
+	// It can be nil when the underlying protocol of the raw
+	// connection uses connection-oriented communication.
+	// After a successful read, it may contain the source address
+	// on the received packet.
+	Addr net.Addr
+
+	N     int // # of bytes read or written from/to Buffers
+	NN    int // # of bytes read or written from/to OOB
+	Flags int // protocol-specific information on the received message
+}
+
+// RecvMsg wraps recvmsg system call.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_PEEK.
+func (c *Conn) RecvMsg(m *Message, flags int) error {
+	return c.recvMsg(m, flags)
+}
+
+// SendMsg wraps sendmsg system call.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_DONTROUTE.
+func (c *Conn) SendMsg(m *Message, flags int) error {
+	return c.sendMsg(m, flags)
+}
+
+// RecvMsgs wraps recvmmsg system call.
+//
+// It returns the number of processed messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_PEEK.
+//
+// Only Linux supports this.
+func (c *Conn) RecvMsgs(ms []Message, flags int) (int, error) {
+	return c.recvMsgs(ms, flags)
+}
+
+// SendMsgs wraps sendmmsg system call.
+//
+// It returns the number of processed messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_DONTROUTE.
+//
+// Only Linux supports this.
+func (c *Conn) SendMsgs(ms []Message, flags int) (int, error) {
+	return c.sendMsgs(ms, flags)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys.go b/vendor/golang.org/x/net/internal/socket/sys.go
new file mode 100644
index 0000000..4f0eead
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys.go
@@ -0,0 +1,33 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import (
+	"encoding/binary"
+	"unsafe"
+)
+
+var (
+	// NativeEndian is the machine native endian implementation of
+	// ByteOrder.
+	NativeEndian binary.ByteOrder
+
+	kernelAlign int
+)
+
+func init() {
+	i := uint32(1)
+	b := (*[4]byte)(unsafe.Pointer(&i))
+	if b[0] == 1 {
+		NativeEndian = binary.LittleEndian
+	} else {
+		NativeEndian = binary.BigEndian
+	}
+	kernelAlign = probeProtocolStack()
+}
+
+func roundup(l int) int {
+	return (l + kernelAlign - 1) & ^(kernelAlign - 1)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_bsd.go b/vendor/golang.org/x/net/internal/socket/sys_bsd.go
new file mode 100644
index 0000000..f13e14f
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_bsd.go
@@ -0,0 +1,17 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd openbsd
+
+package socket
+
+import "errors"
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_bsdvar.go b/vendor/golang.org/x/net/internal/socket/sys_bsdvar.go
new file mode 100644
index 0000000..f723fa3
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_bsdvar.go
@@ -0,0 +1,14 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build freebsd netbsd openbsd
+
+package socket
+
+import "unsafe"
+
+func probeProtocolStack() int {
+	var p uintptr
+	return int(unsafe.Sizeof(p))
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_darwin.go b/vendor/golang.org/x/net/internal/socket/sys_darwin.go
new file mode 100644
index 0000000..b17d223
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_darwin.go
@@ -0,0 +1,7 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+func probeProtocolStack() int { return 4 }
diff --git a/vendor/golang.org/x/net/internal/socket/sys_dragonfly.go b/vendor/golang.org/x/net/internal/socket/sys_dragonfly.go
new file mode 100644
index 0000000..b17d223
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_dragonfly.go
@@ -0,0 +1,7 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+func probeProtocolStack() int { return 4 }
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux.go b/vendor/golang.org/x/net/internal/socket/sys_linux.go
new file mode 100644
index 0000000..1559521
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux.go
@@ -0,0 +1,27 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux,!s390x,!386
+
+package socket
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func probeProtocolStack() int {
+	var p uintptr
+	return int(unsafe.Sizeof(p))
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, _, errno := syscall.Syscall6(sysRECVMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, _, errno := syscall.Syscall6(sysSENDMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_386.go b/vendor/golang.org/x/net/internal/socket/sys_linux_386.go
new file mode 100644
index 0000000..235b2cc
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_386.go
@@ -0,0 +1,55 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func probeProtocolStack() int { return 4 }
+
+const (
+	sysSETSOCKOPT = 0xe
+	sysGETSOCKOPT = 0xf
+	sysSENDMSG    = 0x10
+	sysRECVMSG    = 0x11
+	sysRECVMMSG   = 0x13
+	sysSENDMMSG   = 0x14
+)
+
+func socketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
+func rawsocketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	l := uint32(len(b))
+	_, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0)
+	return int(l), errnoErr(errno)
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	_, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0)
+	return errnoErr(errno)
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, errno := socketcall(sysRECVMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, errno := socketcall(sysSENDMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, errno := socketcall(sysRECVMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, errno := socketcall(sysSENDMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_386.s b/vendor/golang.org/x/net/internal/socket/sys_linux_386.s
new file mode 100644
index 0000000..93e7d75
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_386.s
@@ -0,0 +1,11 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+TEXT	·socketcall(SB),NOSPLIT,$0-36
+	JMP	syscall·socketcall(SB)
+
+TEXT	·rawsocketcall(SB),NOSPLIT,$0-36
+	JMP	syscall·rawsocketcall(SB)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_amd64.go b/vendor/golang.org/x/net/internal/socket/sys_linux_amd64.go
new file mode 100644
index 0000000..9decee2
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_amd64.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x12b
+	sysSENDMMSG = 0x133
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_arm.go b/vendor/golang.org/x/net/internal/socket/sys_linux_arm.go
new file mode 100644
index 0000000..d753b43
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_arm.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x16d
+	sysSENDMMSG = 0x176
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_arm64.go b/vendor/golang.org/x/net/internal/socket/sys_linux_arm64.go
new file mode 100644
index 0000000..b670894
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_arm64.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0xf3
+	sysSENDMMSG = 0x10d
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_mips.go b/vendor/golang.org/x/net/internal/socket/sys_linux_mips.go
new file mode 100644
index 0000000..9c0d740
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_mips.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x10ef
+	sysSENDMMSG = 0x10f7
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_mips64.go b/vendor/golang.org/x/net/internal/socket/sys_linux_mips64.go
new file mode 100644
index 0000000..071a4ab
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_mips64.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x14ae
+	sysSENDMMSG = 0x14b6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_mips64le.go b/vendor/golang.org/x/net/internal/socket/sys_linux_mips64le.go
new file mode 100644
index 0000000..071a4ab
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_mips64le.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x14ae
+	sysSENDMMSG = 0x14b6
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_mipsle.go b/vendor/golang.org/x/net/internal/socket/sys_linux_mipsle.go
new file mode 100644
index 0000000..9c0d740
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_mipsle.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x10ef
+	sysSENDMMSG = 0x10f7
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_ppc64.go b/vendor/golang.org/x/net/internal/socket/sys_linux_ppc64.go
new file mode 100644
index 0000000..21c1e3f
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_ppc64.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x157
+	sysSENDMMSG = 0x15d
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_ppc64le.go b/vendor/golang.org/x/net/internal/socket/sys_linux_ppc64le.go
new file mode 100644
index 0000000..21c1e3f
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_ppc64le.go
@@ -0,0 +1,10 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+const (
+	sysRECVMMSG = 0x157
+	sysSENDMMSG = 0x15d
+)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_s390x.go b/vendor/golang.org/x/net/internal/socket/sys_linux_s390x.go
new file mode 100644
index 0000000..327979e
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_s390x.go
@@ -0,0 +1,55 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func probeProtocolStack() int { return 8 }
+
+const (
+	sysSETSOCKOPT = 0xe
+	sysGETSOCKOPT = 0xf
+	sysSENDMSG    = 0x10
+	sysRECVMSG    = 0x11
+	sysRECVMMSG   = 0x13
+	sysSENDMMSG   = 0x14
+)
+
+func socketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
+func rawsocketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	l := uint32(len(b))
+	_, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0)
+	return int(l), errnoErr(errno)
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	_, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0)
+	return errnoErr(errno)
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, errno := socketcall(sysRECVMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, errno := socketcall(sysSENDMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, errno := socketcall(sysRECVMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, errno := socketcall(sysSENDMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_linux_s390x.s b/vendor/golang.org/x/net/internal/socket/sys_linux_s390x.s
new file mode 100644
index 0000000..06d7562
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_linux_s390x.s
@@ -0,0 +1,11 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+TEXT	·socketcall(SB),NOSPLIT,$0-72
+	JMP	syscall·socketcall(SB)
+
+TEXT	·rawsocketcall(SB),NOSPLIT,$0-72
+	JMP	syscall·rawsocketcall(SB)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_netbsd.go b/vendor/golang.org/x/net/internal/socket/sys_netbsd.go
new file mode 100644
index 0000000..431851c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_netbsd.go
@@ -0,0 +1,25 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+const (
+	sysRECVMMSG = 0x1db
+	sysSENDMMSG = 0x1dc
+)
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, _, errno := syscall.Syscall6(sysRECVMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	n, _, errno := syscall.Syscall6(sysSENDMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
+	return int(n), errnoErr(errno)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_posix.go b/vendor/golang.org/x/net/internal/socket/sys_posix.go
new file mode 100644
index 0000000..dc130c2
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_posix.go
@@ -0,0 +1,168 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package socket
+
+import (
+	"encoding/binary"
+	"errors"
+	"net"
+	"runtime"
+	"strconv"
+	"sync"
+	"time"
+)
+
+func marshalInetAddr(a net.Addr) []byte {
+	switch a := a.(type) {
+	case *net.TCPAddr:
+		return marshalSockaddr(a.IP, a.Port, a.Zone)
+	case *net.UDPAddr:
+		return marshalSockaddr(a.IP, a.Port, a.Zone)
+	case *net.IPAddr:
+		return marshalSockaddr(a.IP, 0, a.Zone)
+	default:
+		return nil
+	}
+}
+
+func marshalSockaddr(ip net.IP, port int, zone string) []byte {
+	if ip4 := ip.To4(); ip4 != nil {
+		b := make([]byte, sizeofSockaddrInet)
+		switch runtime.GOOS {
+		case "android", "linux", "solaris", "windows":
+			NativeEndian.PutUint16(b[:2], uint16(sysAF_INET))
+		default:
+			b[0] = sizeofSockaddrInet
+			b[1] = sysAF_INET
+		}
+		binary.BigEndian.PutUint16(b[2:4], uint16(port))
+		copy(b[4:8], ip4)
+		return b
+	}
+	if ip6 := ip.To16(); ip6 != nil && ip.To4() == nil {
+		b := make([]byte, sizeofSockaddrInet6)
+		switch runtime.GOOS {
+		case "android", "linux", "solaris", "windows":
+			NativeEndian.PutUint16(b[:2], uint16(sysAF_INET6))
+		default:
+			b[0] = sizeofSockaddrInet6
+			b[1] = sysAF_INET6
+		}
+		binary.BigEndian.PutUint16(b[2:4], uint16(port))
+		copy(b[8:24], ip6)
+		if zone != "" {
+			NativeEndian.PutUint32(b[24:28], uint32(zoneCache.index(zone)))
+		}
+		return b
+	}
+	return nil
+}
+
+func parseInetAddr(b []byte, network string) (net.Addr, error) {
+	if len(b) < 2 {
+		return nil, errors.New("invalid address")
+	}
+	var af int
+	switch runtime.GOOS {
+	case "android", "linux", "solaris", "windows":
+		af = int(NativeEndian.Uint16(b[:2]))
+	default:
+		af = int(b[1])
+	}
+	var ip net.IP
+	var zone string
+	if af == sysAF_INET {
+		if len(b) < sizeofSockaddrInet {
+			return nil, errors.New("short address")
+		}
+		ip = make(net.IP, net.IPv4len)
+		copy(ip, b[4:8])
+	}
+	if af == sysAF_INET6 {
+		if len(b) < sizeofSockaddrInet6 {
+			return nil, errors.New("short address")
+		}
+		ip = make(net.IP, net.IPv6len)
+		copy(ip, b[8:24])
+		if id := int(NativeEndian.Uint32(b[24:28])); id > 0 {
+			zone = zoneCache.name(id)
+		}
+	}
+	switch network {
+	case "tcp", "tcp4", "tcp6":
+		return &net.TCPAddr{IP: ip, Port: int(binary.BigEndian.Uint16(b[2:4])), Zone: zone}, nil
+	case "udp", "udp4", "udp6":
+		return &net.UDPAddr{IP: ip, Port: int(binary.BigEndian.Uint16(b[2:4])), Zone: zone}, nil
+	default:
+		return &net.IPAddr{IP: ip, Zone: zone}, nil
+	}
+}
+
+// An ipv6ZoneCache represents a cache holding partial network
+// interface information. It is used for reducing the cost of IPv6
+// addressing scope zone resolution.
+//
+// Multiple names sharing the index are managed by first-come
+// first-served basis for consistency.
+type ipv6ZoneCache struct {
+	sync.RWMutex                // guard the following
+	lastFetched  time.Time      // last time routing information was fetched
+	toIndex      map[string]int // interface name to its index
+	toName       map[int]string // interface index to its name
+}
+
+var zoneCache = ipv6ZoneCache{
+	toIndex: make(map[string]int),
+	toName:  make(map[int]string),
+}
+
+func (zc *ipv6ZoneCache) update(ift []net.Interface) {
+	zc.Lock()
+	defer zc.Unlock()
+	now := time.Now()
+	if zc.lastFetched.After(now.Add(-60 * time.Second)) {
+		return
+	}
+	zc.lastFetched = now
+	if len(ift) == 0 {
+		var err error
+		if ift, err = net.Interfaces(); err != nil {
+			return
+		}
+	}
+	zc.toIndex = make(map[string]int, len(ift))
+	zc.toName = make(map[int]string, len(ift))
+	for _, ifi := range ift {
+		zc.toIndex[ifi.Name] = ifi.Index
+		if _, ok := zc.toName[ifi.Index]; !ok {
+			zc.toName[ifi.Index] = ifi.Name
+		}
+	}
+}
+
+func (zc *ipv6ZoneCache) name(zone int) string {
+	zoneCache.update(nil)
+	zoneCache.RLock()
+	defer zoneCache.RUnlock()
+	name, ok := zoneCache.toName[zone]
+	if !ok {
+		name = strconv.Itoa(zone)
+	}
+	return name
+}
+
+func (zc *ipv6ZoneCache) index(zone string) int {
+	zoneCache.update(nil)
+	zoneCache.RLock()
+	defer zoneCache.RUnlock()
+	index, ok := zoneCache.toIndex[zone]
+	if !ok {
+		index, _ = strconv.Atoi(zone)
+	}
+	return index
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_solaris.go b/vendor/golang.org/x/net/internal/socket/sys_solaris.go
new file mode 100644
index 0000000..cced74e
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_solaris.go
@@ -0,0 +1,71 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import (
+	"errors"
+	"runtime"
+	"syscall"
+	"unsafe"
+)
+
+func probeProtocolStack() int {
+	switch runtime.GOARCH {
+	case "amd64":
+		return 4
+	default:
+		var p uintptr
+		return int(unsafe.Sizeof(p))
+	}
+}
+
+//go:cgo_import_dynamic libc___xnet_getsockopt __xnet_getsockopt "libsocket.so"
+//go:cgo_import_dynamic libc_setsockopt setsockopt "libsocket.so"
+//go:cgo_import_dynamic libc___xnet_recvmsg __xnet_recvmsg "libsocket.so"
+//go:cgo_import_dynamic libc___xnet_sendmsg __xnet_sendmsg "libsocket.so"
+
+//go:linkname procGetsockopt libc___xnet_getsockopt
+//go:linkname procSetsockopt libc_setsockopt
+//go:linkname procRecvmsg libc___xnet_recvmsg
+//go:linkname procSendmsg libc___xnet_sendmsg
+
+var (
+	procGetsockopt uintptr
+	procSetsockopt uintptr
+	procRecvmsg    uintptr
+	procSendmsg    uintptr
+)
+
+func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno)
+func rawSysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno)
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	l := uint32(len(b))
+	_, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procGetsockopt)), 5, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0)
+	return int(l), errnoErr(errno)
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	_, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procSetsockopt)), 5, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0)
+	return errnoErr(errno)
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procRecvmsg)), 3, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, _, errno := sysvicall6(uintptr(unsafe.Pointer(&procSendmsg)), 3, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
+	return int(n), errnoErr(errno)
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_solaris_amd64.s b/vendor/golang.org/x/net/internal/socket/sys_solaris_amd64.s
new file mode 100644
index 0000000..a18ac5e
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_solaris_amd64.s
@@ -0,0 +1,11 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+TEXT	·sysvicall6(SB),NOSPLIT,$0-88
+	JMP	syscall·sysvicall6(SB)
+
+TEXT	·rawSysvicall6(SB),NOSPLIT,$0-88
+	JMP	syscall·rawSysvicall6(SB)
diff --git a/vendor/golang.org/x/net/internal/socket/sys_stub.go b/vendor/golang.org/x/net/internal/socket/sys_stub.go
new file mode 100644
index 0000000..d9f06d0
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_stub.go
@@ -0,0 +1,64 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package socket
+
+import (
+	"errors"
+	"net"
+	"runtime"
+	"unsafe"
+)
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+func probeProtocolStack() int {
+	switch runtime.GOARCH {
+	case "amd64p32", "mips64p32":
+		return 4
+	default:
+		var p uintptr
+		return int(unsafe.Sizeof(p))
+	}
+}
+
+func marshalInetAddr(ip net.IP, port int, zone string) []byte {
+	return nil
+}
+
+func parseInetAddr(b []byte, network string) (net.Addr, error) {
+	return nil, errors.New("not implemented")
+}
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	return errors.New("not implemented")
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_unix.go b/vendor/golang.org/x/net/internal/socket/sys_unix.go
new file mode 100644
index 0000000..18eba30
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_unix.go
@@ -0,0 +1,33 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux,!s390x,!386 netbsd openbsd
+
+package socket
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	l := uint32(len(b))
+	_, _, errno := syscall.Syscall6(syscall.SYS_GETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0)
+	return int(l), errnoErr(errno)
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	_, _, errno := syscall.Syscall6(syscall.SYS_SETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0)
+	return errnoErr(errno)
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, _, errno := syscall.Syscall(syscall.SYS_RECVMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags))
+	return int(n), errnoErr(errno)
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	n, _, errno := syscall.Syscall(syscall.SYS_SENDMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags))
+	return int(n), errnoErr(errno)
+}
diff --git a/vendor/golang.org/x/net/internal/socket/sys_windows.go b/vendor/golang.org/x/net/internal/socket/sys_windows.go
new file mode 100644
index 0000000..54a470e
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/sys_windows.go
@@ -0,0 +1,70 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socket
+
+import (
+	"errors"
+	"syscall"
+	"unsafe"
+)
+
+func probeProtocolStack() int {
+	var p uintptr
+	return int(unsafe.Sizeof(p))
+}
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x17
+
+	sysSOCK_RAW = 0x3
+)
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	l := uint32(len(b))
+	err := syscall.Getsockopt(syscall.Handle(s), int32(level), int32(name), (*byte)(unsafe.Pointer(&b[0])), (*int32)(unsafe.Pointer(&l)))
+	return int(l), err
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	return syscall.Setsockopt(syscall.Handle(s), int32(level), int32(name), (*byte)(unsafe.Pointer(&b[0])), int32(len(b)))
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_darwin_386.go b/vendor/golang.org/x/net/internal/socket/zsys_darwin_386.go
new file mode 100644
index 0000000..26f8fef
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_darwin_386.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1e
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     int32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_darwin_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_darwin_amd64.go
new file mode 100644
index 0000000..e2987f7
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_darwin_amd64.go
@@ -0,0 +1,61 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1e
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     int32
+	Pad_cgo_1  [4]byte
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_darwin_arm.go b/vendor/golang.org/x/net/internal/socket/zsys_darwin_arm.go
new file mode 100644
index 0000000..26f8fef
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_darwin_arm.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1e
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     int32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_darwin_arm64.go b/vendor/golang.org/x/net/internal/socket/zsys_darwin_arm64.go
new file mode 100644
index 0000000..e2987f7
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_darwin_arm64.go
@@ -0,0 +1,61 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1e
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     int32
+	Pad_cgo_1  [4]byte
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_dragonfly_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_dragonfly_amd64.go
new file mode 100644
index 0000000..c582abd
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_dragonfly_amd64.go
@@ -0,0 +1,61 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_dragonfly.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1c
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     int32
+	Pad_cgo_1  [4]byte
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_freebsd_386.go b/vendor/golang.org/x/net/internal/socket/zsys_freebsd_386.go
new file mode 100644
index 0000000..04a2488
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_freebsd_386.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1c
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     int32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_freebsd_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_freebsd_amd64.go
new file mode 100644
index 0000000..35c7cb9
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_freebsd_amd64.go
@@ -0,0 +1,61 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1c
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     int32
+	Pad_cgo_1  [4]byte
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_freebsd_arm.go b/vendor/golang.org/x/net/internal/socket/zsys_freebsd_arm.go
new file mode 100644
index 0000000..04a2488
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_freebsd_arm.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1c
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     int32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_386.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_386.go
new file mode 100644
index 0000000..4302069
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_386.go
@@ -0,0 +1,63 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     uint32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type mmsghdr struct {
+	Hdr msghdr
+	Len uint32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofMmsghdr = 0x20
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_amd64.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_amd64.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_arm.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_arm.go
new file mode 100644
index 0000000..4302069
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_arm.go
@@ -0,0 +1,63 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     uint32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type mmsghdr struct {
+	Hdr msghdr
+	Len uint32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofMmsghdr = 0x20
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_arm64.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_arm64.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_arm64.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_mips.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_mips.go
new file mode 100644
index 0000000..4302069
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_mips.go
@@ -0,0 +1,63 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     uint32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type mmsghdr struct {
+	Hdr msghdr
+	Len uint32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofMmsghdr = 0x20
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_mips64.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_mips64.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_mips64.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_mips64le.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_mips64le.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_mips64le.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_mipsle.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_mipsle.go
new file mode 100644
index 0000000..4302069
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_mipsle.go
@@ -0,0 +1,63 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     uint32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type mmsghdr struct {
+	Hdr msghdr
+	Len uint32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofMmsghdr = 0x20
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_ppc64.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_ppc64.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_ppc64.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_ppc64le.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_ppc64le.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_ppc64le.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_linux_s390x.go b/vendor/golang.org/x/net/internal/socket/zsys_linux_s390x.go
new file mode 100644
index 0000000..1502f6c
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_linux_s390x.go
@@ -0,0 +1,66 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint64
+	Control    *byte
+	Controllen uint64
+	Flags      int32
+	Pad_cgo_1  [4]byte
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint64
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x38
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0x10
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_netbsd_386.go b/vendor/golang.org/x/net/internal/socket/zsys_netbsd_386.go
new file mode 100644
index 0000000..db60491
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_netbsd_386.go
@@ -0,0 +1,65 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_netbsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x18
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     int32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type mmsghdr struct {
+	Hdr msghdr
+	Len uint32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofMmsghdr = 0x20
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_netbsd_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_netbsd_amd64.go
new file mode 100644
index 0000000..2a1a799
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_netbsd_amd64.go
@@ -0,0 +1,68 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_netbsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x18
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     int32
+	Pad_cgo_1  [4]byte
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type mmsghdr struct {
+	Hdr       msghdr
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofMmsghdr = 0x40
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_netbsd_arm.go b/vendor/golang.org/x/net/internal/socket/zsys_netbsd_arm.go
new file mode 100644
index 0000000..206ea2d
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_netbsd_arm.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_netbsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x18
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     int32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_openbsd_386.go b/vendor/golang.org/x/net/internal/socket/zsys_openbsd_386.go
new file mode 100644
index 0000000..1c83636
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_openbsd_386.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_openbsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x18
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     uint32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_openbsd_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_openbsd_amd64.go
new file mode 100644
index 0000000..a6c0bf4
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_openbsd_amd64.go
@@ -0,0 +1,61 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_openbsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x18
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint64
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Pad_cgo_0  [4]byte
+	Iov        *iovec
+	Iovlen     uint32
+	Pad_cgo_1  [4]byte
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_openbsd_arm.go b/vendor/golang.org/x/net/internal/socket/zsys_openbsd_arm.go
new file mode 100644
index 0000000..1c83636
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_openbsd_arm.go
@@ -0,0 +1,59 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_openbsd.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x18
+
+	sysSOCK_RAW = 0x3
+)
+
+type iovec struct {
+	Base *byte
+	Len  uint32
+}
+
+type msghdr struct {
+	Name       *byte
+	Namelen    uint32
+	Iov        *iovec
+	Iovlen     uint32
+	Control    *byte
+	Controllen uint32
+	Flags      int32
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+const (
+	sizeofIovec   = 0x8
+	sizeofMsghdr  = 0x1c
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x1c
+)
diff --git a/vendor/golang.org/x/net/internal/socket/zsys_solaris_amd64.go b/vendor/golang.org/x/net/internal/socket/zsys_solaris_amd64.go
new file mode 100644
index 0000000..327c632
--- /dev/null
+++ b/vendor/golang.org/x/net/internal/socket/zsys_solaris_amd64.go
@@ -0,0 +1,60 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_solaris.go
+
+package socket
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0x1a
+
+	sysSOCK_RAW = 0x4
+)
+
+type iovec struct {
+	Base *int8
+	Len  uint64
+}
+
+type msghdr struct {
+	Name         *byte
+	Namelen      uint32
+	Pad_cgo_0    [4]byte
+	Iov          *iovec
+	Iovlen       int32
+	Pad_cgo_1    [4]byte
+	Accrights    *int8
+	Accrightslen int32
+	Pad_cgo_2    [4]byte
+}
+
+type cmsghdr struct {
+	Len   uint32
+	Level int32
+	Type  int32
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type sockaddrInet6 struct {
+	Family         uint16
+	Port           uint16
+	Flowinfo       uint32
+	Addr           [16]byte /* in6_addr */
+	Scope_id       uint32
+	X__sin6_src_id uint32
+}
+
+const (
+	sizeofIovec   = 0x10
+	sizeofMsghdr  = 0x30
+	sizeofCmsghdr = 0xc
+
+	sizeofSockaddrInet  = 0x10
+	sizeofSockaddrInet6 = 0x20
+)
diff --git a/vendor/golang.org/x/net/ipv4/batch.go b/vendor/golang.org/x/net/ipv4/batch.go
new file mode 100644
index 0000000..b445499
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/batch.go
@@ -0,0 +1,191 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+
+package ipv4
+
+import (
+	"net"
+	"runtime"
+	"syscall"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the ReadBatch and WriteBatch methods of
+// PacketConn are not implemented.
+
+// BUG(mikio): On Windows, the ReadBatch and WriteBatch methods of
+// RawConn are not implemented.
+
+// A Message represents an IO message.
+//
+//	type Message struct {
+//		Buffers [][]byte
+//		OOB     []byte
+//		Addr    net.Addr
+//		N       int
+//		NN      int
+//		Flags   int
+//	}
+//
+// The Buffers fields represents a list of contiguous buffers, which
+// can be used for vectored IO, for example, putting a header and a
+// payload in each slice.
+// When writing, the Buffers field must contain at least one byte to
+// write.
+// When reading, the Buffers field will always contain a byte to read.
+//
+// The OOB field contains protocol-specific control or miscellaneous
+// ancillary data known as out-of-band data.
+// It can be nil when not required.
+//
+// The Addr field specifies a destination address when writing.
+// It can be nil when the underlying protocol of the endpoint uses
+// connection-oriented communication.
+// After a successful read, it may contain the source address on the
+// received packet.
+//
+// The N field indicates the number of bytes read or written from/to
+// Buffers.
+//
+// The NN field indicates the number of bytes read or written from/to
+// OOB.
+//
+// The Flags field contains protocol-specific information on the
+// received message.
+type Message = socket.Message
+
+// ReadBatch reads a batch of messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_PEEK.
+//
+// On a successful read it returns the number of messages received, up
+// to len(ms).
+//
+// On Linux, a batch read will be optimized.
+// On other platforms, this method will read only a single message.
+//
+// Unlike the ReadFrom method, it doesn't strip the IPv4 header
+// followed by option headers from the received IPv4 datagram when the
+// underlying transport is net.IPConn. Each Buffers field of Message
+// must be large enough to accommodate an IPv4 header and option
+// headers.
+func (c *payloadHandler) ReadBatch(ms []Message, flags int) (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	switch runtime.GOOS {
+	case "linux":
+		n, err := c.RecvMsgs([]socket.Message(ms), flags)
+		if err != nil {
+			err = &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	default:
+		n := 1
+		err := c.RecvMsg(&ms[0], flags)
+		if err != nil {
+			n = 0
+			err = &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	}
+}
+
+// WriteBatch writes a batch of messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_DONTROUTE.
+//
+// It returns the number of messages written on a successful write.
+//
+// On Linux, a batch write will be optimized.
+// On other platforms, this method will write only a single message.
+func (c *payloadHandler) WriteBatch(ms []Message, flags int) (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	switch runtime.GOOS {
+	case "linux":
+		n, err := c.SendMsgs([]socket.Message(ms), flags)
+		if err != nil {
+			err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	default:
+		n := 1
+		err := c.SendMsg(&ms[0], flags)
+		if err != nil {
+			n = 0
+			err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	}
+}
+
+// ReadBatch reads a batch of messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_PEEK.
+//
+// On a successful read it returns the number of messages received, up
+// to len(ms).
+//
+// On Linux, a batch read will be optimized.
+// On other platforms, this method will read only a single message.
+func (c *packetHandler) ReadBatch(ms []Message, flags int) (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	switch runtime.GOOS {
+	case "linux":
+		n, err := c.RecvMsgs([]socket.Message(ms), flags)
+		if err != nil {
+			err = &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	default:
+		n := 1
+		err := c.RecvMsg(&ms[0], flags)
+		if err != nil {
+			n = 0
+			err = &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	}
+}
+
+// WriteBatch writes a batch of messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_DONTROUTE.
+//
+// It returns the number of messages written on a successful write.
+//
+// On Linux, a batch write will be optimized.
+// On other platforms, this method will write only a single message.
+func (c *packetHandler) WriteBatch(ms []Message, flags int) (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	switch runtime.GOOS {
+	case "linux":
+		n, err := c.SendMsgs([]socket.Message(ms), flags)
+		if err != nil {
+			err = &net.OpError{Op: "write", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	default:
+		n := 1
+		err := c.SendMsg(&ms[0], flags)
+		if err != nil {
+			n = 0
+			err = &net.OpError{Op: "write", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv4/control.go b/vendor/golang.org/x/net/ipv4/control.go
new file mode 100644
index 0000000..a2b02ca
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/control.go
@@ -0,0 +1,144 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"fmt"
+	"net"
+	"sync"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+type rawOpt struct {
+	sync.RWMutex
+	cflags ControlFlags
+}
+
+func (c *rawOpt) set(f ControlFlags)        { c.cflags |= f }
+func (c *rawOpt) clear(f ControlFlags)      { c.cflags &^= f }
+func (c *rawOpt) isset(f ControlFlags) bool { return c.cflags&f != 0 }
+
+type ControlFlags uint
+
+const (
+	FlagTTL       ControlFlags = 1 << iota // pass the TTL on the received packet
+	FlagSrc                                // pass the source address on the received packet
+	FlagDst                                // pass the destination address on the received packet
+	FlagInterface                          // pass the interface index on the received packet
+)
+
+// A ControlMessage represents per packet basis IP-level socket options.
+type ControlMessage struct {
+	// Receiving socket options: SetControlMessage allows to
+	// receive the options from the protocol stack using ReadFrom
+	// method of PacketConn or RawConn.
+	//
+	// Specifying socket options: ControlMessage for WriteTo
+	// method of PacketConn or RawConn allows to send the options
+	// to the protocol stack.
+	//
+	TTL     int    // time-to-live, receiving only
+	Src     net.IP // source address, specifying only
+	Dst     net.IP // destination address, receiving only
+	IfIndex int    // interface index, must be 1 <= value when specifying
+}
+
+func (cm *ControlMessage) String() string {
+	if cm == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ttl=%d src=%v dst=%v ifindex=%d", cm.TTL, cm.Src, cm.Dst, cm.IfIndex)
+}
+
+// Marshal returns the binary encoding of cm.
+func (cm *ControlMessage) Marshal() []byte {
+	if cm == nil {
+		return nil
+	}
+	var m socket.ControlMessage
+	if ctlOpts[ctlPacketInfo].name > 0 && (cm.Src.To4() != nil || cm.IfIndex > 0) {
+		m = socket.NewControlMessage([]int{ctlOpts[ctlPacketInfo].length})
+	}
+	if len(m) > 0 {
+		ctlOpts[ctlPacketInfo].marshal(m, cm)
+	}
+	return m
+}
+
+// Parse parses b as a control message and stores the result in cm.
+func (cm *ControlMessage) Parse(b []byte) error {
+	ms, err := socket.ControlMessage(b).Parse()
+	if err != nil {
+		return err
+	}
+	for _, m := range ms {
+		lvl, typ, l, err := m.ParseHeader()
+		if err != nil {
+			return err
+		}
+		if lvl != iana.ProtocolIP {
+			continue
+		}
+		switch {
+		case typ == ctlOpts[ctlTTL].name && l >= ctlOpts[ctlTTL].length:
+			ctlOpts[ctlTTL].parse(cm, m.Data(l))
+		case typ == ctlOpts[ctlDst].name && l >= ctlOpts[ctlDst].length:
+			ctlOpts[ctlDst].parse(cm, m.Data(l))
+		case typ == ctlOpts[ctlInterface].name && l >= ctlOpts[ctlInterface].length:
+			ctlOpts[ctlInterface].parse(cm, m.Data(l))
+		case typ == ctlOpts[ctlPacketInfo].name && l >= ctlOpts[ctlPacketInfo].length:
+			ctlOpts[ctlPacketInfo].parse(cm, m.Data(l))
+		}
+	}
+	return nil
+}
+
+// NewControlMessage returns a new control message.
+//
+// The returned message is large enough for options specified by cf.
+func NewControlMessage(cf ControlFlags) []byte {
+	opt := rawOpt{cflags: cf}
+	var l int
+	if opt.isset(FlagTTL) && ctlOpts[ctlTTL].name > 0 {
+		l += socket.ControlMessageSpace(ctlOpts[ctlTTL].length)
+	}
+	if ctlOpts[ctlPacketInfo].name > 0 {
+		if opt.isset(FlagSrc | FlagDst | FlagInterface) {
+			l += socket.ControlMessageSpace(ctlOpts[ctlPacketInfo].length)
+		}
+	} else {
+		if opt.isset(FlagDst) && ctlOpts[ctlDst].name > 0 {
+			l += socket.ControlMessageSpace(ctlOpts[ctlDst].length)
+		}
+		if opt.isset(FlagInterface) && ctlOpts[ctlInterface].name > 0 {
+			l += socket.ControlMessageSpace(ctlOpts[ctlInterface].length)
+		}
+	}
+	var b []byte
+	if l > 0 {
+		b = make([]byte, l)
+	}
+	return b
+}
+
+// Ancillary data socket options
+const (
+	ctlTTL        = iota // header field
+	ctlSrc               // header field
+	ctlDst               // header field
+	ctlInterface         // inbound or outbound interface
+	ctlPacketInfo        // inbound or outbound packet path
+	ctlMax
+)
+
+// A ctlOpt represents a binding for ancillary data socket option.
+type ctlOpt struct {
+	name    int // option name, must be equal or greater than 1
+	length  int // option length
+	marshal func([]byte, *ControlMessage) []byte
+	parse   func(*ControlMessage, []byte)
+}
diff --git a/vendor/golang.org/x/net/ipv4/control_bsd.go b/vendor/golang.org/x/net/ipv4/control_bsd.go
new file mode 100644
index 0000000..77e7ad5
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/control_bsd.go
@@ -0,0 +1,40 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+func marshalDst(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIP, sysIP_RECVDSTADDR, net.IPv4len)
+	return m.Next(net.IPv4len)
+}
+
+func parseDst(cm *ControlMessage, b []byte) {
+	if len(cm.Dst) < net.IPv4len {
+		cm.Dst = make(net.IP, net.IPv4len)
+	}
+	copy(cm.Dst, b[:net.IPv4len])
+}
+
+func marshalInterface(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIP, sysIP_RECVIF, syscall.SizeofSockaddrDatalink)
+	return m.Next(syscall.SizeofSockaddrDatalink)
+}
+
+func parseInterface(cm *ControlMessage, b []byte) {
+	sadl := (*syscall.SockaddrDatalink)(unsafe.Pointer(&b[0]))
+	cm.IfIndex = int(sadl.Index)
+}
diff --git a/vendor/golang.org/x/net/ipv4/control_pktinfo.go b/vendor/golang.org/x/net/ipv4/control_pktinfo.go
new file mode 100644
index 0000000..425338f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/control_pktinfo.go
@@ -0,0 +1,39 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin linux solaris
+
+package ipv4
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIP, sysIP_PKTINFO, sizeofInetPktinfo)
+	if cm != nil {
+		pi := (*inetPktinfo)(unsafe.Pointer(&m.Data(sizeofInetPktinfo)[0]))
+		if ip := cm.Src.To4(); ip != nil {
+			copy(pi.Spec_dst[:], ip)
+		}
+		if cm.IfIndex > 0 {
+			pi.setIfindex(cm.IfIndex)
+		}
+	}
+	return m.Next(sizeofInetPktinfo)
+}
+
+func parsePacketInfo(cm *ControlMessage, b []byte) {
+	pi := (*inetPktinfo)(unsafe.Pointer(&b[0]))
+	cm.IfIndex = int(pi.Ifindex)
+	if len(cm.Dst) < net.IPv4len {
+		cm.Dst = make(net.IP, net.IPv4len)
+	}
+	copy(cm.Dst, pi.Addr[:])
+}
diff --git a/vendor/golang.org/x/net/ipv4/control_stub.go b/vendor/golang.org/x/net/ipv4/control_stub.go
new file mode 100644
index 0000000..5a2f7d8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/control_stub.go
@@ -0,0 +1,13 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv4
+
+import "golang.org/x/net/internal/socket"
+
+func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv4/control_unix.go b/vendor/golang.org/x/net/ipv4/control_unix.go
new file mode 100644
index 0000000..e1ae816
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/control_unix.go
@@ -0,0 +1,73 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package ipv4
+
+import (
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
+	opt.Lock()
+	defer opt.Unlock()
+	if so, ok := sockOpts[ssoReceiveTTL]; ok && cf&FlagTTL != 0 {
+		if err := so.SetInt(c, boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagTTL)
+		} else {
+			opt.clear(FlagTTL)
+		}
+	}
+	if so, ok := sockOpts[ssoPacketInfo]; ok {
+		if cf&(FlagSrc|FlagDst|FlagInterface) != 0 {
+			if err := so.SetInt(c, boolint(on)); err != nil {
+				return err
+			}
+			if on {
+				opt.set(cf & (FlagSrc | FlagDst | FlagInterface))
+			} else {
+				opt.clear(cf & (FlagSrc | FlagDst | FlagInterface))
+			}
+		}
+	} else {
+		if so, ok := sockOpts[ssoReceiveDst]; ok && cf&FlagDst != 0 {
+			if err := so.SetInt(c, boolint(on)); err != nil {
+				return err
+			}
+			if on {
+				opt.set(FlagDst)
+			} else {
+				opt.clear(FlagDst)
+			}
+		}
+		if so, ok := sockOpts[ssoReceiveInterface]; ok && cf&FlagInterface != 0 {
+			if err := so.SetInt(c, boolint(on)); err != nil {
+				return err
+			}
+			if on {
+				opt.set(FlagInterface)
+			} else {
+				opt.clear(FlagInterface)
+			}
+		}
+	}
+	return nil
+}
+
+func marshalTTL(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIP, sysIP_RECVTTL, 1)
+	return m.Next(1)
+}
+
+func parseTTL(cm *ControlMessage, b []byte) {
+	cm.TTL = int(*(*byte)(unsafe.Pointer(&b[:1][0])))
+}
diff --git a/vendor/golang.org/x/net/ipv4/control_windows.go b/vendor/golang.org/x/net/ipv4/control_windows.go
new file mode 100644
index 0000000..ce55c66
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/control_windows.go
@@ -0,0 +1,16 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"syscall"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
+	// TODO(mikio): implement this
+	return syscall.EWINDOWS
+}
diff --git a/vendor/golang.org/x/net/ipv4/defs_darwin.go b/vendor/golang.org/x/net/ipv4/defs_darwin.go
new file mode 100644
index 0000000..c8f2e05
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_darwin.go
@@ -0,0 +1,77 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysIP_OPTIONS     = C.IP_OPTIONS
+	sysIP_HDRINCL     = C.IP_HDRINCL
+	sysIP_TOS         = C.IP_TOS
+	sysIP_TTL         = C.IP_TTL
+	sysIP_RECVOPTS    = C.IP_RECVOPTS
+	sysIP_RECVRETOPTS = C.IP_RECVRETOPTS
+	sysIP_RECVDSTADDR = C.IP_RECVDSTADDR
+	sysIP_RETOPTS     = C.IP_RETOPTS
+	sysIP_RECVIF      = C.IP_RECVIF
+	sysIP_STRIPHDR    = C.IP_STRIPHDR
+	sysIP_RECVTTL     = C.IP_RECVTTL
+	sysIP_BOUND_IF    = C.IP_BOUND_IF
+	sysIP_PKTINFO     = C.IP_PKTINFO
+	sysIP_RECVPKTINFO = C.IP_RECVPKTINFO
+
+	sysIP_MULTICAST_IF           = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL          = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP         = C.IP_MULTICAST_LOOP
+	sysIP_ADD_MEMBERSHIP         = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP        = C.IP_DROP_MEMBERSHIP
+	sysIP_MULTICAST_VIF          = C.IP_MULTICAST_VIF
+	sysIP_MULTICAST_IFINDEX      = C.IP_MULTICAST_IFINDEX
+	sysIP_ADD_SOURCE_MEMBERSHIP  = C.IP_ADD_SOURCE_MEMBERSHIP
+	sysIP_DROP_SOURCE_MEMBERSHIP = C.IP_DROP_SOURCE_MEMBERSHIP
+	sysIP_BLOCK_SOURCE           = C.IP_BLOCK_SOURCE
+	sysIP_UNBLOCK_SOURCE         = C.IP_UNBLOCK_SOURCE
+	sysMCAST_JOIN_GROUP          = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP         = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP   = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP  = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE        = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE      = C.MCAST_UNBLOCK_SOURCE
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet    = C.sizeof_struct_sockaddr_in
+	sizeofInetPktinfo     = C.sizeof_struct_in_pktinfo
+
+	sizeofIPMreq         = C.sizeof_struct_ip_mreq
+	sizeofIPMreqn        = C.sizeof_struct_ip_mreqn
+	sizeofIPMreqSource   = C.sizeof_struct_ip_mreq_source
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+)
+
+type sockaddrStorage C.struct_sockaddr_storage
+
+type sockaddrInet C.struct_sockaddr_in
+
+type inetPktinfo C.struct_in_pktinfo
+
+type ipMreq C.struct_ip_mreq
+
+type ipMreqn C.struct_ip_mreqn
+
+type ipMreqSource C.struct_ip_mreq_source
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
diff --git a/vendor/golang.org/x/net/ipv4/defs_dragonfly.go b/vendor/golang.org/x/net/ipv4/defs_dragonfly.go
new file mode 100644
index 0000000..f30544e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_dragonfly.go
@@ -0,0 +1,38 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysIP_OPTIONS     = C.IP_OPTIONS
+	sysIP_HDRINCL     = C.IP_HDRINCL
+	sysIP_TOS         = C.IP_TOS
+	sysIP_TTL         = C.IP_TTL
+	sysIP_RECVOPTS    = C.IP_RECVOPTS
+	sysIP_RECVRETOPTS = C.IP_RECVRETOPTS
+	sysIP_RECVDSTADDR = C.IP_RECVDSTADDR
+	sysIP_RETOPTS     = C.IP_RETOPTS
+	sysIP_RECVIF      = C.IP_RECVIF
+	sysIP_RECVTTL     = C.IP_RECVTTL
+
+	sysIP_MULTICAST_IF    = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL   = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP  = C.IP_MULTICAST_LOOP
+	sysIP_MULTICAST_VIF   = C.IP_MULTICAST_VIF
+	sysIP_ADD_MEMBERSHIP  = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP = C.IP_DROP_MEMBERSHIP
+
+	sizeofIPMreq = C.sizeof_struct_ip_mreq
+)
+
+type ipMreq C.struct_ip_mreq
diff --git a/vendor/golang.org/x/net/ipv4/defs_freebsd.go b/vendor/golang.org/x/net/ipv4/defs_freebsd.go
new file mode 100644
index 0000000..4dd57d8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_freebsd.go
@@ -0,0 +1,75 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysIP_OPTIONS     = C.IP_OPTIONS
+	sysIP_HDRINCL     = C.IP_HDRINCL
+	sysIP_TOS         = C.IP_TOS
+	sysIP_TTL         = C.IP_TTL
+	sysIP_RECVOPTS    = C.IP_RECVOPTS
+	sysIP_RECVRETOPTS = C.IP_RECVRETOPTS
+	sysIP_RECVDSTADDR = C.IP_RECVDSTADDR
+	sysIP_SENDSRCADDR = C.IP_SENDSRCADDR
+	sysIP_RETOPTS     = C.IP_RETOPTS
+	sysIP_RECVIF      = C.IP_RECVIF
+	sysIP_ONESBCAST   = C.IP_ONESBCAST
+	sysIP_BINDANY     = C.IP_BINDANY
+	sysIP_RECVTTL     = C.IP_RECVTTL
+	sysIP_MINTTL      = C.IP_MINTTL
+	sysIP_DONTFRAG    = C.IP_DONTFRAG
+	sysIP_RECVTOS     = C.IP_RECVTOS
+
+	sysIP_MULTICAST_IF           = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL          = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP         = C.IP_MULTICAST_LOOP
+	sysIP_ADD_MEMBERSHIP         = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP        = C.IP_DROP_MEMBERSHIP
+	sysIP_MULTICAST_VIF          = C.IP_MULTICAST_VIF
+	sysIP_ADD_SOURCE_MEMBERSHIP  = C.IP_ADD_SOURCE_MEMBERSHIP
+	sysIP_DROP_SOURCE_MEMBERSHIP = C.IP_DROP_SOURCE_MEMBERSHIP
+	sysIP_BLOCK_SOURCE           = C.IP_BLOCK_SOURCE
+	sysIP_UNBLOCK_SOURCE         = C.IP_UNBLOCK_SOURCE
+	sysMCAST_JOIN_GROUP          = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP         = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP   = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP  = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE        = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE      = C.MCAST_UNBLOCK_SOURCE
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet    = C.sizeof_struct_sockaddr_in
+
+	sizeofIPMreq         = C.sizeof_struct_ip_mreq
+	sizeofIPMreqn        = C.sizeof_struct_ip_mreqn
+	sizeofIPMreqSource   = C.sizeof_struct_ip_mreq_source
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+)
+
+type sockaddrStorage C.struct_sockaddr_storage
+
+type sockaddrInet C.struct_sockaddr_in
+
+type ipMreq C.struct_ip_mreq
+
+type ipMreqn C.struct_ip_mreqn
+
+type ipMreqSource C.struct_ip_mreq_source
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
diff --git a/vendor/golang.org/x/net/ipv4/defs_linux.go b/vendor/golang.org/x/net/ipv4/defs_linux.go
new file mode 100644
index 0000000..beb1107
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_linux.go
@@ -0,0 +1,122 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <time.h>
+
+#include <linux/errqueue.h>
+#include <linux/icmp.h>
+#include <linux/in.h>
+#include <linux/filter.h>
+#include <sys/socket.h>
+*/
+import "C"
+
+const (
+	sysIP_TOS             = C.IP_TOS
+	sysIP_TTL             = C.IP_TTL
+	sysIP_HDRINCL         = C.IP_HDRINCL
+	sysIP_OPTIONS         = C.IP_OPTIONS
+	sysIP_ROUTER_ALERT    = C.IP_ROUTER_ALERT
+	sysIP_RECVOPTS        = C.IP_RECVOPTS
+	sysIP_RETOPTS         = C.IP_RETOPTS
+	sysIP_PKTINFO         = C.IP_PKTINFO
+	sysIP_PKTOPTIONS      = C.IP_PKTOPTIONS
+	sysIP_MTU_DISCOVER    = C.IP_MTU_DISCOVER
+	sysIP_RECVERR         = C.IP_RECVERR
+	sysIP_RECVTTL         = C.IP_RECVTTL
+	sysIP_RECVTOS         = C.IP_RECVTOS
+	sysIP_MTU             = C.IP_MTU
+	sysIP_FREEBIND        = C.IP_FREEBIND
+	sysIP_TRANSPARENT     = C.IP_TRANSPARENT
+	sysIP_RECVRETOPTS     = C.IP_RECVRETOPTS
+	sysIP_ORIGDSTADDR     = C.IP_ORIGDSTADDR
+	sysIP_RECVORIGDSTADDR = C.IP_RECVORIGDSTADDR
+	sysIP_MINTTL          = C.IP_MINTTL
+	sysIP_NODEFRAG        = C.IP_NODEFRAG
+	sysIP_UNICAST_IF      = C.IP_UNICAST_IF
+
+	sysIP_MULTICAST_IF           = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL          = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP         = C.IP_MULTICAST_LOOP
+	sysIP_ADD_MEMBERSHIP         = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP        = C.IP_DROP_MEMBERSHIP
+	sysIP_UNBLOCK_SOURCE         = C.IP_UNBLOCK_SOURCE
+	sysIP_BLOCK_SOURCE           = C.IP_BLOCK_SOURCE
+	sysIP_ADD_SOURCE_MEMBERSHIP  = C.IP_ADD_SOURCE_MEMBERSHIP
+	sysIP_DROP_SOURCE_MEMBERSHIP = C.IP_DROP_SOURCE_MEMBERSHIP
+	sysIP_MSFILTER               = C.IP_MSFILTER
+	sysMCAST_JOIN_GROUP          = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP         = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP   = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP  = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE        = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE      = C.MCAST_UNBLOCK_SOURCE
+	sysMCAST_MSFILTER            = C.MCAST_MSFILTER
+	sysIP_MULTICAST_ALL          = C.IP_MULTICAST_ALL
+
+	//sysIP_PMTUDISC_DONT      = C.IP_PMTUDISC_DONT
+	//sysIP_PMTUDISC_WANT      = C.IP_PMTUDISC_WANT
+	//sysIP_PMTUDISC_DO        = C.IP_PMTUDISC_DO
+	//sysIP_PMTUDISC_PROBE     = C.IP_PMTUDISC_PROBE
+	//sysIP_PMTUDISC_INTERFACE = C.IP_PMTUDISC_INTERFACE
+	//sysIP_PMTUDISC_OMIT      = C.IP_PMTUDISC_OMIT
+
+	sysICMP_FILTER = C.ICMP_FILTER
+
+	sysSO_EE_ORIGIN_NONE         = C.SO_EE_ORIGIN_NONE
+	sysSO_EE_ORIGIN_LOCAL        = C.SO_EE_ORIGIN_LOCAL
+	sysSO_EE_ORIGIN_ICMP         = C.SO_EE_ORIGIN_ICMP
+	sysSO_EE_ORIGIN_ICMP6        = C.SO_EE_ORIGIN_ICMP6
+	sysSO_EE_ORIGIN_TXSTATUS     = C.SO_EE_ORIGIN_TXSTATUS
+	sysSO_EE_ORIGIN_TIMESTAMPING = C.SO_EE_ORIGIN_TIMESTAMPING
+
+	sysSOL_SOCKET       = C.SOL_SOCKET
+	sysSO_ATTACH_FILTER = C.SO_ATTACH_FILTER
+
+	sizeofKernelSockaddrStorage = C.sizeof_struct___kernel_sockaddr_storage
+	sizeofSockaddrInet          = C.sizeof_struct_sockaddr_in
+	sizeofInetPktinfo           = C.sizeof_struct_in_pktinfo
+	sizeofSockExtendedErr       = C.sizeof_struct_sock_extended_err
+
+	sizeofIPMreq         = C.sizeof_struct_ip_mreq
+	sizeofIPMreqn        = C.sizeof_struct_ip_mreqn
+	sizeofIPMreqSource   = C.sizeof_struct_ip_mreq_source
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sizeofICMPFilter = C.sizeof_struct_icmp_filter
+
+	sizeofSockFprog = C.sizeof_struct_sock_fprog
+)
+
+type kernelSockaddrStorage C.struct___kernel_sockaddr_storage
+
+type sockaddrInet C.struct_sockaddr_in
+
+type inetPktinfo C.struct_in_pktinfo
+
+type sockExtendedErr C.struct_sock_extended_err
+
+type ipMreq C.struct_ip_mreq
+
+type ipMreqn C.struct_ip_mreqn
+
+type ipMreqSource C.struct_ip_mreq_source
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
+
+type icmpFilter C.struct_icmp_filter
+
+type sockFProg C.struct_sock_fprog
+
+type sockFilter C.struct_sock_filter
diff --git a/vendor/golang.org/x/net/ipv4/defs_netbsd.go b/vendor/golang.org/x/net/ipv4/defs_netbsd.go
new file mode 100644
index 0000000..8f8af1b
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_netbsd.go
@@ -0,0 +1,37 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysIP_OPTIONS     = C.IP_OPTIONS
+	sysIP_HDRINCL     = C.IP_HDRINCL
+	sysIP_TOS         = C.IP_TOS
+	sysIP_TTL         = C.IP_TTL
+	sysIP_RECVOPTS    = C.IP_RECVOPTS
+	sysIP_RECVRETOPTS = C.IP_RECVRETOPTS
+	sysIP_RECVDSTADDR = C.IP_RECVDSTADDR
+	sysIP_RETOPTS     = C.IP_RETOPTS
+	sysIP_RECVIF      = C.IP_RECVIF
+	sysIP_RECVTTL     = C.IP_RECVTTL
+
+	sysIP_MULTICAST_IF    = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL   = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP  = C.IP_MULTICAST_LOOP
+	sysIP_ADD_MEMBERSHIP  = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP = C.IP_DROP_MEMBERSHIP
+
+	sizeofIPMreq = C.sizeof_struct_ip_mreq
+)
+
+type ipMreq C.struct_ip_mreq
diff --git a/vendor/golang.org/x/net/ipv4/defs_openbsd.go b/vendor/golang.org/x/net/ipv4/defs_openbsd.go
new file mode 100644
index 0000000..8f8af1b
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_openbsd.go
@@ -0,0 +1,37 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysIP_OPTIONS     = C.IP_OPTIONS
+	sysIP_HDRINCL     = C.IP_HDRINCL
+	sysIP_TOS         = C.IP_TOS
+	sysIP_TTL         = C.IP_TTL
+	sysIP_RECVOPTS    = C.IP_RECVOPTS
+	sysIP_RECVRETOPTS = C.IP_RECVRETOPTS
+	sysIP_RECVDSTADDR = C.IP_RECVDSTADDR
+	sysIP_RETOPTS     = C.IP_RETOPTS
+	sysIP_RECVIF      = C.IP_RECVIF
+	sysIP_RECVTTL     = C.IP_RECVTTL
+
+	sysIP_MULTICAST_IF    = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL   = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP  = C.IP_MULTICAST_LOOP
+	sysIP_ADD_MEMBERSHIP  = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP = C.IP_DROP_MEMBERSHIP
+
+	sizeofIPMreq = C.sizeof_struct_ip_mreq
+)
+
+type ipMreq C.struct_ip_mreq
diff --git a/vendor/golang.org/x/net/ipv4/defs_solaris.go b/vendor/golang.org/x/net/ipv4/defs_solaris.go
new file mode 100644
index 0000000..aeb33e9
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/defs_solaris.go
@@ -0,0 +1,84 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+
+package ipv4
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sysIP_OPTIONS     = C.IP_OPTIONS
+	sysIP_HDRINCL     = C.IP_HDRINCL
+	sysIP_TOS         = C.IP_TOS
+	sysIP_TTL         = C.IP_TTL
+	sysIP_RECVOPTS    = C.IP_RECVOPTS
+	sysIP_RECVRETOPTS = C.IP_RECVRETOPTS
+	sysIP_RECVDSTADDR = C.IP_RECVDSTADDR
+	sysIP_RETOPTS     = C.IP_RETOPTS
+	sysIP_RECVIF      = C.IP_RECVIF
+	sysIP_RECVSLLA    = C.IP_RECVSLLA
+	sysIP_RECVTTL     = C.IP_RECVTTL
+
+	sysIP_MULTICAST_IF           = C.IP_MULTICAST_IF
+	sysIP_MULTICAST_TTL          = C.IP_MULTICAST_TTL
+	sysIP_MULTICAST_LOOP         = C.IP_MULTICAST_LOOP
+	sysIP_ADD_MEMBERSHIP         = C.IP_ADD_MEMBERSHIP
+	sysIP_DROP_MEMBERSHIP        = C.IP_DROP_MEMBERSHIP
+	sysIP_BLOCK_SOURCE           = C.IP_BLOCK_SOURCE
+	sysIP_UNBLOCK_SOURCE         = C.IP_UNBLOCK_SOURCE
+	sysIP_ADD_SOURCE_MEMBERSHIP  = C.IP_ADD_SOURCE_MEMBERSHIP
+	sysIP_DROP_SOURCE_MEMBERSHIP = C.IP_DROP_SOURCE_MEMBERSHIP
+	sysIP_NEXTHOP                = C.IP_NEXTHOP
+
+	sysIP_PKTINFO     = C.IP_PKTINFO
+	sysIP_RECVPKTINFO = C.IP_RECVPKTINFO
+	sysIP_DONTFRAG    = C.IP_DONTFRAG
+
+	sysIP_BOUND_IF      = C.IP_BOUND_IF
+	sysIP_UNSPEC_SRC    = C.IP_UNSPEC_SRC
+	sysIP_BROADCAST_TTL = C.IP_BROADCAST_TTL
+	sysIP_DHCPINIT_IF   = C.IP_DHCPINIT_IF
+
+	sysIP_REUSEADDR = C.IP_REUSEADDR
+	sysIP_DONTROUTE = C.IP_DONTROUTE
+	sysIP_BROADCAST = C.IP_BROADCAST
+
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet    = C.sizeof_struct_sockaddr_in
+	sizeofInetPktinfo     = C.sizeof_struct_in_pktinfo
+
+	sizeofIPMreq         = C.sizeof_struct_ip_mreq
+	sizeofIPMreqSource   = C.sizeof_struct_ip_mreq_source
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+)
+
+type sockaddrStorage C.struct_sockaddr_storage
+
+type sockaddrInet C.struct_sockaddr_in
+
+type inetPktinfo C.struct_in_pktinfo
+
+type ipMreq C.struct_ip_mreq
+
+type ipMreqSource C.struct_ip_mreq_source
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
diff --git a/vendor/golang.org/x/net/ipv4/dgramopt.go b/vendor/golang.org/x/net/ipv4/dgramopt.go
new file mode 100644
index 0000000..54d77d5
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/dgramopt.go
@@ -0,0 +1,265 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/bpf"
+)
+
+// MulticastTTL returns the time-to-live field value for outgoing
+// multicast packets.
+func (c *dgramOpt) MulticastTTL() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastTTL]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	return so.GetInt(c.Conn)
+}
+
+// SetMulticastTTL sets the time-to-live field value for future
+// outgoing multicast packets.
+func (c *dgramOpt) SetMulticastTTL(ttl int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastTTL]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, ttl)
+}
+
+// MulticastInterface returns the default interface for multicast
+// packet transmissions.
+func (c *dgramOpt) MulticastInterface() (*net.Interface, error) {
+	if !c.ok() {
+		return nil, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastInterface]
+	if !ok {
+		return nil, errOpNoSupport
+	}
+	return so.getMulticastInterface(c.Conn)
+}
+
+// SetMulticastInterface sets the default interface for future
+// multicast packet transmissions.
+func (c *dgramOpt) SetMulticastInterface(ifi *net.Interface) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastInterface]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.setMulticastInterface(c.Conn, ifi)
+}
+
+// MulticastLoopback reports whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) MulticastLoopback() (bool, error) {
+	if !c.ok() {
+		return false, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastLoopback]
+	if !ok {
+		return false, errOpNoSupport
+	}
+	on, err := so.GetInt(c.Conn)
+	if err != nil {
+		return false, err
+	}
+	return on == 1, nil
+}
+
+// SetMulticastLoopback sets whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) SetMulticastLoopback(on bool) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastLoopback]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, boolint(on))
+}
+
+// JoinGroup joins the group address group on the interface ifi.
+// By default all sources that can cast data to group are accepted.
+// It's possible to mute and unmute data transmission from a specific
+// source by using ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup.
+// JoinGroup uses the system assigned multicast interface when ifi is
+// nil, although this is not recommended because the assignment
+// depends on platforms and sometimes it might require routing
+// configuration.
+func (c *dgramOpt) JoinGroup(ifi *net.Interface, group net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoJoinGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP4(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	return so.setGroup(c.Conn, ifi, grp)
+}
+
+// LeaveGroup leaves the group address group on the interface ifi
+// regardless of whether the group is any-source group or
+// source-specific group.
+func (c *dgramOpt) LeaveGroup(ifi *net.Interface, group net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoLeaveGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP4(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	return so.setGroup(c.Conn, ifi, grp)
+}
+
+// JoinSourceSpecificGroup joins the source-specific group comprising
+// group and source on the interface ifi.
+// JoinSourceSpecificGroup uses the system assigned multicast
+// interface when ifi is nil, although this is not recommended because
+// the assignment depends on platforms and sometimes it might require
+// routing configuration.
+func (c *dgramOpt) JoinSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoJoinSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP4(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP4(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// LeaveSourceSpecificGroup leaves the source-specific group on the
+// interface ifi.
+func (c *dgramOpt) LeaveSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoLeaveSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP4(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP4(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// ExcludeSourceSpecificGroup excludes the source-specific group from
+// the already joined any-source groups by JoinGroup on the interface
+// ifi.
+func (c *dgramOpt) ExcludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoBlockSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP4(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP4(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// IncludeSourceSpecificGroup includes the excluded source-specific
+// group by ExcludeSourceSpecificGroup again on the interface ifi.
+func (c *dgramOpt) IncludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoUnblockSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP4(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP4(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// ICMPFilter returns an ICMP filter.
+// Currently only Linux supports this.
+func (c *dgramOpt) ICMPFilter() (*ICMPFilter, error) {
+	if !c.ok() {
+		return nil, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoICMPFilter]
+	if !ok {
+		return nil, errOpNoSupport
+	}
+	return so.getICMPFilter(c.Conn)
+}
+
+// SetICMPFilter deploys the ICMP filter.
+// Currently only Linux supports this.
+func (c *dgramOpt) SetICMPFilter(f *ICMPFilter) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoICMPFilter]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.setICMPFilter(c.Conn, f)
+}
+
+// SetBPF attaches a BPF program to the connection.
+//
+// Only supported on Linux.
+func (c *dgramOpt) SetBPF(filter []bpf.RawInstruction) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoAttachFilter]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.setBPF(c.Conn, filter)
+}
diff --git a/vendor/golang.org/x/net/ipv4/doc.go b/vendor/golang.org/x/net/ipv4/doc.go
new file mode 100644
index 0000000..b43935a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/doc.go
@@ -0,0 +1,244 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package ipv4 implements IP-level socket options for the Internet
+// Protocol version 4.
+//
+// The package provides IP-level socket options that allow
+// manipulation of IPv4 facilities.
+//
+// The IPv4 protocol and basic host requirements for IPv4 are defined
+// in RFC 791 and RFC 1122.
+// Host extensions for multicasting and socket interface extensions
+// for multicast source filters are defined in RFC 1112 and RFC 3678.
+// IGMPv1, IGMPv2 and IGMPv3 are defined in RFC 1112, RFC 2236 and RFC
+// 3376.
+// Source-specific multicast is defined in RFC 4607.
+//
+//
+// Unicasting
+//
+// The options for unicasting are available for net.TCPConn,
+// net.UDPConn and net.IPConn which are created as network connections
+// that use the IPv4 transport. When a single TCP connection carrying
+// a data flow of multiple packets needs to indicate the flow is
+// important, Conn is used to set the type-of-service field on the
+// IPv4 header for each packet.
+//
+//	ln, err := net.Listen("tcp4", "0.0.0.0:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer ln.Close()
+//	for {
+//		c, err := ln.Accept()
+//		if err != nil {
+//			// error handling
+//		}
+//		go func(c net.Conn) {
+//			defer c.Close()
+//
+// The outgoing packets will be labeled DiffServ assured forwarding
+// class 1 low drop precedence, known as AF11 packets.
+//
+//			if err := ipv4.NewConn(c).SetTOS(0x28); err != nil {
+//				// error handling
+//			}
+//			if _, err := c.Write(data); err != nil {
+//				// error handling
+//			}
+//		}(c)
+//	}
+//
+//
+// Multicasting
+//
+// The options for multicasting are available for net.UDPConn and
+// net.IPconn which are created as network connections that use the
+// IPv4 transport. A few network facilities must be prepared before
+// you begin multicasting, at a minimum joining network interfaces and
+// multicast groups.
+//
+//	en0, err := net.InterfaceByName("en0")
+//	if err != nil {
+//		// error handling
+//	}
+//	en1, err := net.InterfaceByIndex(911)
+//	if err != nil {
+//		// error handling
+//	}
+//	group := net.IPv4(224, 0, 0, 250)
+//
+// First, an application listens to an appropriate address with an
+// appropriate service port.
+//
+//	c, err := net.ListenPacket("udp4", "0.0.0.0:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c.Close()
+//
+// Second, the application joins multicast groups, starts listening to
+// the groups on the specified network interfaces. Note that the
+// service port for transport layer protocol does not matter with this
+// operation as joining groups affects only network and link layer
+// protocols, such as IPv4 and Ethernet.
+//
+//	p := ipv4.NewPacketConn(c)
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: group}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en1, &net.UDPAddr{IP: group}); err != nil {
+//		// error handling
+//	}
+//
+// The application might set per packet control message transmissions
+// between the protocol stack within the kernel. When the application
+// needs a destination address on an incoming packet,
+// SetControlMessage of PacketConn is used to enable control message
+// transmissions.
+//
+//	if err := p.SetControlMessage(ipv4.FlagDst, true); err != nil {
+//		// error handling
+//	}
+//
+// The application could identify whether the received packets are
+// of interest by using the control message that contains the
+// destination address of the received packet.
+//
+//	b := make([]byte, 1500)
+//	for {
+//		n, cm, src, err := p.ReadFrom(b)
+//		if err != nil {
+//			// error handling
+//		}
+//		if cm.Dst.IsMulticast() {
+//			if cm.Dst.Equal(group) {
+//				// joined group, do something
+//			} else {
+//				// unknown group, discard
+//				continue
+//			}
+//		}
+//
+// The application can also send both unicast and multicast packets.
+//
+//		p.SetTOS(0x0)
+//		p.SetTTL(16)
+//		if _, err := p.WriteTo(data, nil, src); err != nil {
+//			// error handling
+//		}
+//		dst := &net.UDPAddr{IP: group, Port: 1024}
+//		for _, ifi := range []*net.Interface{en0, en1} {
+//			if err := p.SetMulticastInterface(ifi); err != nil {
+//				// error handling
+//			}
+//			p.SetMulticastTTL(2)
+//			if _, err := p.WriteTo(data, nil, dst); err != nil {
+//				// error handling
+//			}
+//		}
+//	}
+//
+//
+// More multicasting
+//
+// An application that uses PacketConn or RawConn may join multiple
+// multicast groups. For example, a UDP listener with port 1024 might
+// join two different groups across over two different network
+// interfaces by using:
+//
+//	c, err := net.ListenPacket("udp4", "0.0.0.0:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c.Close()
+//	p := ipv4.NewPacketConn(c)
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 248)}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 249)}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en1, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 249)}); err != nil {
+//		// error handling
+//	}
+//
+// It is possible for multiple UDP listeners that listen on the same
+// UDP port to join the same multicast group. The net package will
+// provide a socket that listens to a wildcard address with reusable
+// UDP port when an appropriate multicast address prefix is passed to
+// the net.ListenPacket or net.ListenUDP.
+//
+//	c1, err := net.ListenPacket("udp4", "224.0.0.0:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c1.Close()
+//	c2, err := net.ListenPacket("udp4", "224.0.0.0:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c2.Close()
+//	p1 := ipv4.NewPacketConn(c1)
+//	if err := p1.JoinGroup(en0, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 248)}); err != nil {
+//		// error handling
+//	}
+//	p2 := ipv4.NewPacketConn(c2)
+//	if err := p2.JoinGroup(en0, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 248)}); err != nil {
+//		// error handling
+//	}
+//
+// Also it is possible for the application to leave or rejoin a
+// multicast group on the network interface.
+//
+//	if err := p.LeaveGroup(en0, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 248)}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.IPv4(224, 0, 0, 250)}); err != nil {
+//		// error handling
+//	}
+//
+//
+// Source-specific multicasting
+//
+// An application that uses PacketConn or RawConn on IGMPv3 supported
+// platform is able to join source-specific multicast groups.
+// The application may use JoinSourceSpecificGroup and
+// LeaveSourceSpecificGroup for the operation known as "include" mode,
+//
+//	ssmgroup := net.UDPAddr{IP: net.IPv4(232, 7, 8, 9)}
+//	ssmsource := net.UDPAddr{IP: net.IPv4(192, 168, 0, 1)})
+//	if err := p.JoinSourceSpecificGroup(en0, &ssmgroup, &ssmsource); err != nil {
+//		// error handling
+//	}
+//	if err := p.LeaveSourceSpecificGroup(en0, &ssmgroup, &ssmsource); err != nil {
+//		// error handling
+//	}
+//
+// or JoinGroup, ExcludeSourceSpecificGroup,
+// IncludeSourceSpecificGroup and LeaveGroup for the operation known
+// as "exclude" mode.
+//
+//	exclsource := net.UDPAddr{IP: net.IPv4(192, 168, 0, 254)}
+//	if err := p.JoinGroup(en0, &ssmgroup); err != nil {
+//		// error handling
+//	}
+//	if err := p.ExcludeSourceSpecificGroup(en0, &ssmgroup, &exclsource); err != nil {
+//		// error handling
+//	}
+//	if err := p.LeaveGroup(en0, &ssmgroup); err != nil {
+//		// error handling
+//	}
+//
+// Note that it depends on each platform implementation what happens
+// when an application which runs on IGMPv3 unsupported platform uses
+// JoinSourceSpecificGroup and LeaveSourceSpecificGroup.
+// In general the platform tries to fall back to conversations using
+// IGMPv1 or IGMPv2 and starts to listen to multicast traffic.
+// In the fallback case, ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup may return an error.
+package ipv4 // import "golang.org/x/net/ipv4"
+
+// BUG(mikio): This package is not implemented on NaCl and Plan 9.
diff --git a/vendor/golang.org/x/net/ipv4/endpoint.go b/vendor/golang.org/x/net/ipv4/endpoint.go
new file mode 100644
index 0000000..2ab8773
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/endpoint.go
@@ -0,0 +1,187 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+	"time"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the JoinSourceSpecificGroup,
+// LeaveSourceSpecificGroup, ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup methods of PacketConn and RawConn are
+// not implemented.
+
+// A Conn represents a network endpoint that uses the IPv4 transport.
+// It is used to control basic IP-level socket options such as TOS and
+// TTL.
+type Conn struct {
+	genericOpt
+}
+
+type genericOpt struct {
+	*socket.Conn
+}
+
+func (c *genericOpt) ok() bool { return c != nil && c.Conn != nil }
+
+// NewConn returns a new Conn.
+func NewConn(c net.Conn) *Conn {
+	cc, _ := socket.NewConn(c)
+	return &Conn{
+		genericOpt: genericOpt{Conn: cc},
+	}
+}
+
+// A PacketConn represents a packet network endpoint that uses the
+// IPv4 transport. It is used to control several IP-level socket
+// options including multicasting. It also provides datagram based
+// network I/O methods specific to the IPv4 and higher layer protocols
+// such as UDP.
+type PacketConn struct {
+	genericOpt
+	dgramOpt
+	payloadHandler
+}
+
+type dgramOpt struct {
+	*socket.Conn
+}
+
+func (c *dgramOpt) ok() bool { return c != nil && c.Conn != nil }
+
+// SetControlMessage sets the per packet IP-level socket options.
+func (c *PacketConn) SetControlMessage(cf ControlFlags, on bool) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return setControlMessage(c.dgramOpt.Conn, &c.payloadHandler.rawOpt, cf, on)
+}
+
+// SetDeadline sets the read and write deadlines associated with the
+// endpoint.
+func (c *PacketConn) SetDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.PacketConn.SetDeadline(t)
+}
+
+// SetReadDeadline sets the read deadline associated with the
+// endpoint.
+func (c *PacketConn) SetReadDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.PacketConn.SetReadDeadline(t)
+}
+
+// SetWriteDeadline sets the write deadline associated with the
+// endpoint.
+func (c *PacketConn) SetWriteDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.PacketConn.SetWriteDeadline(t)
+}
+
+// Close closes the endpoint.
+func (c *PacketConn) Close() error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.PacketConn.Close()
+}
+
+// NewPacketConn returns a new PacketConn using c as its underlying
+// transport.
+func NewPacketConn(c net.PacketConn) *PacketConn {
+	cc, _ := socket.NewConn(c.(net.Conn))
+	p := &PacketConn{
+		genericOpt:     genericOpt{Conn: cc},
+		dgramOpt:       dgramOpt{Conn: cc},
+		payloadHandler: payloadHandler{PacketConn: c, Conn: cc},
+	}
+	return p
+}
+
+// A RawConn represents a packet network endpoint that uses the IPv4
+// transport. It is used to control several IP-level socket options
+// including IPv4 header manipulation. It also provides datagram
+// based network I/O methods specific to the IPv4 and higher layer
+// protocols that handle IPv4 datagram directly such as OSPF, GRE.
+type RawConn struct {
+	genericOpt
+	dgramOpt
+	packetHandler
+}
+
+// SetControlMessage sets the per packet IP-level socket options.
+func (c *RawConn) SetControlMessage(cf ControlFlags, on bool) error {
+	if !c.packetHandler.ok() {
+		return syscall.EINVAL
+	}
+	return setControlMessage(c.dgramOpt.Conn, &c.packetHandler.rawOpt, cf, on)
+}
+
+// SetDeadline sets the read and write deadlines associated with the
+// endpoint.
+func (c *RawConn) SetDeadline(t time.Time) error {
+	if !c.packetHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.packetHandler.IPConn.SetDeadline(t)
+}
+
+// SetReadDeadline sets the read deadline associated with the
+// endpoint.
+func (c *RawConn) SetReadDeadline(t time.Time) error {
+	if !c.packetHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.packetHandler.IPConn.SetReadDeadline(t)
+}
+
+// SetWriteDeadline sets the write deadline associated with the
+// endpoint.
+func (c *RawConn) SetWriteDeadline(t time.Time) error {
+	if !c.packetHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.packetHandler.IPConn.SetWriteDeadline(t)
+}
+
+// Close closes the endpoint.
+func (c *RawConn) Close() error {
+	if !c.packetHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.packetHandler.IPConn.Close()
+}
+
+// NewRawConn returns a new RawConn using c as its underlying
+// transport.
+func NewRawConn(c net.PacketConn) (*RawConn, error) {
+	cc, err := socket.NewConn(c.(net.Conn))
+	if err != nil {
+		return nil, err
+	}
+	r := &RawConn{
+		genericOpt:    genericOpt{Conn: cc},
+		dgramOpt:      dgramOpt{Conn: cc},
+		packetHandler: packetHandler{IPConn: c.(*net.IPConn), Conn: cc},
+	}
+	so, ok := sockOpts[ssoHeaderPrepend]
+	if !ok {
+		return nil, errOpNoSupport
+	}
+	if err := so.SetInt(r.dgramOpt.Conn, boolint(true)); err != nil {
+		return nil, err
+	}
+	return r, nil
+}
diff --git a/vendor/golang.org/x/net/ipv4/gen.go b/vendor/golang.org/x/net/ipv4/gen.go
new file mode 100644
index 0000000..9d490fa
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/gen.go
@@ -0,0 +1,199 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+//go:generate go run gen.go
+
+// This program generates system adaptation constants and types,
+// internet protocol constants and tables by reading template files
+// and IANA protocol registries.
+package main
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"go/format"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	if err := genzsys(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	if err := geniana(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func genzsys() error {
+	defs := "defs_" + runtime.GOOS + ".go"
+	f, err := os.Open(defs)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	f.Close()
+	cmd := exec.Command("go", "tool", "cgo", "-godefs", defs)
+	b, err := cmd.Output()
+	if err != nil {
+		return err
+	}
+	b, err = format.Source(b)
+	if err != nil {
+		return err
+	}
+	zsys := "zsys_" + runtime.GOOS + ".go"
+	switch runtime.GOOS {
+	case "freebsd", "linux":
+		zsys = "zsys_" + runtime.GOOS + "_" + runtime.GOARCH + ".go"
+	}
+	if err := ioutil.WriteFile(zsys, b, 0644); err != nil {
+		return err
+	}
+	return nil
+}
+
+var registries = []struct {
+	url   string
+	parse func(io.Writer, io.Reader) error
+}{
+	{
+		"https://www.iana.org/assignments/icmp-parameters/icmp-parameters.xml",
+		parseICMPv4Parameters,
+	},
+}
+
+func geniana() error {
+	var bb bytes.Buffer
+	fmt.Fprintf(&bb, "// go generate gen.go\n")
+	fmt.Fprintf(&bb, "// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n")
+	fmt.Fprintf(&bb, "package ipv4\n\n")
+	for _, r := range registries {
+		resp, err := http.Get(r.url)
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			return fmt.Errorf("got HTTP status code %v for %v\n", resp.StatusCode, r.url)
+		}
+		if err := r.parse(&bb, resp.Body); err != nil {
+			return err
+		}
+		fmt.Fprintf(&bb, "\n")
+	}
+	b, err := format.Source(bb.Bytes())
+	if err != nil {
+		return err
+	}
+	if err := ioutil.WriteFile("iana.go", b, 0644); err != nil {
+		return err
+	}
+	return nil
+}
+
+func parseICMPv4Parameters(w io.Writer, r io.Reader) error {
+	dec := xml.NewDecoder(r)
+	var icp icmpv4Parameters
+	if err := dec.Decode(&icp); err != nil {
+		return err
+	}
+	prs := icp.escape()
+	fmt.Fprintf(w, "// %s, Updated: %s\n", icp.Title, icp.Updated)
+	fmt.Fprintf(w, "const (\n")
+	for _, pr := range prs {
+		if pr.Descr == "" {
+			continue
+		}
+		fmt.Fprintf(w, "ICMPType%s ICMPType = %d", pr.Descr, pr.Value)
+		fmt.Fprintf(w, "// %s\n", pr.OrigDescr)
+	}
+	fmt.Fprintf(w, ")\n\n")
+	fmt.Fprintf(w, "// %s, Updated: %s\n", icp.Title, icp.Updated)
+	fmt.Fprintf(w, "var icmpTypes = map[ICMPType]string{\n")
+	for _, pr := range prs {
+		if pr.Descr == "" {
+			continue
+		}
+		fmt.Fprintf(w, "%d: %q,\n", pr.Value, strings.ToLower(pr.OrigDescr))
+	}
+	fmt.Fprintf(w, "}\n")
+	return nil
+}
+
+type icmpv4Parameters struct {
+	XMLName    xml.Name `xml:"registry"`
+	Title      string   `xml:"title"`
+	Updated    string   `xml:"updated"`
+	Registries []struct {
+		Title   string `xml:"title"`
+		Records []struct {
+			Value string `xml:"value"`
+			Descr string `xml:"description"`
+		} `xml:"record"`
+	} `xml:"registry"`
+}
+
+type canonICMPv4ParamRecord struct {
+	OrigDescr string
+	Descr     string
+	Value     int
+}
+
+func (icp *icmpv4Parameters) escape() []canonICMPv4ParamRecord {
+	id := -1
+	for i, r := range icp.Registries {
+		if strings.Contains(r.Title, "Type") || strings.Contains(r.Title, "type") {
+			id = i
+			break
+		}
+	}
+	if id < 0 {
+		return nil
+	}
+	prs := make([]canonICMPv4ParamRecord, len(icp.Registries[id].Records))
+	sr := strings.NewReplacer(
+		"Messages", "",
+		"Message", "",
+		"ICMP", "",
+		"+", "P",
+		"-", "",
+		"/", "",
+		".", "",
+		" ", "",
+	)
+	for i, pr := range icp.Registries[id].Records {
+		if strings.Contains(pr.Descr, "Reserved") ||
+			strings.Contains(pr.Descr, "Unassigned") ||
+			strings.Contains(pr.Descr, "Deprecated") ||
+			strings.Contains(pr.Descr, "Experiment") ||
+			strings.Contains(pr.Descr, "experiment") {
+			continue
+		}
+		ss := strings.Split(pr.Descr, "\n")
+		if len(ss) > 1 {
+			prs[i].Descr = strings.Join(ss, " ")
+		} else {
+			prs[i].Descr = ss[0]
+		}
+		s := strings.TrimSpace(prs[i].Descr)
+		prs[i].OrigDescr = s
+		prs[i].Descr = sr.Replace(s)
+		prs[i].Value, _ = strconv.Atoi(pr.Value)
+	}
+	return prs
+}
diff --git a/vendor/golang.org/x/net/ipv4/genericopt.go b/vendor/golang.org/x/net/ipv4/genericopt.go
new file mode 100644
index 0000000..119bf84
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/genericopt.go
@@ -0,0 +1,57 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import "syscall"
+
+// TOS returns the type-of-service field value for outgoing packets.
+func (c *genericOpt) TOS() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoTOS]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	return so.GetInt(c.Conn)
+}
+
+// SetTOS sets the type-of-service field value for future outgoing
+// packets.
+func (c *genericOpt) SetTOS(tos int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoTOS]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, tos)
+}
+
+// TTL returns the time-to-live field value for outgoing packets.
+func (c *genericOpt) TTL() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoTTL]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	return so.GetInt(c.Conn)
+}
+
+// SetTTL sets the time-to-live field value for future outgoing
+// packets.
+func (c *genericOpt) SetTTL(ttl int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoTTL]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, ttl)
+}
diff --git a/vendor/golang.org/x/net/ipv4/header.go b/vendor/golang.org/x/net/ipv4/header.go
new file mode 100644
index 0000000..8bb0f0f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/header.go
@@ -0,0 +1,159 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"encoding/binary"
+	"fmt"
+	"net"
+	"runtime"
+	"syscall"
+
+	"golang.org/x/net/internal/socket"
+)
+
+const (
+	Version      = 4  // protocol version
+	HeaderLen    = 20 // header length without extension headers
+	maxHeaderLen = 60 // sensible default, revisit if later RFCs define new usage of version and header length fields
+)
+
+type HeaderFlags int
+
+const (
+	MoreFragments HeaderFlags = 1 << iota // more fragments flag
+	DontFragment                          // don't fragment flag
+)
+
+// A Header represents an IPv4 header.
+type Header struct {
+	Version  int         // protocol version
+	Len      int         // header length
+	TOS      int         // type-of-service
+	TotalLen int         // packet total length
+	ID       int         // identification
+	Flags    HeaderFlags // flags
+	FragOff  int         // fragment offset
+	TTL      int         // time-to-live
+	Protocol int         // next protocol
+	Checksum int         // checksum
+	Src      net.IP      // source address
+	Dst      net.IP      // destination address
+	Options  []byte      // options, extension headers
+}
+
+func (h *Header) String() string {
+	if h == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ver=%d hdrlen=%d tos=%#x totallen=%d id=%#x flags=%#x fragoff=%#x ttl=%d proto=%d cksum=%#x src=%v dst=%v", h.Version, h.Len, h.TOS, h.TotalLen, h.ID, h.Flags, h.FragOff, h.TTL, h.Protocol, h.Checksum, h.Src, h.Dst)
+}
+
+// Marshal returns the binary encoding of h.
+func (h *Header) Marshal() ([]byte, error) {
+	if h == nil {
+		return nil, syscall.EINVAL
+	}
+	if h.Len < HeaderLen {
+		return nil, errHeaderTooShort
+	}
+	hdrlen := HeaderLen + len(h.Options)
+	b := make([]byte, hdrlen)
+	b[0] = byte(Version<<4 | (hdrlen >> 2 & 0x0f))
+	b[1] = byte(h.TOS)
+	flagsAndFragOff := (h.FragOff & 0x1fff) | int(h.Flags<<13)
+	switch runtime.GOOS {
+	case "darwin", "dragonfly", "netbsd":
+		socket.NativeEndian.PutUint16(b[2:4], uint16(h.TotalLen))
+		socket.NativeEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
+	case "freebsd":
+		if freebsdVersion < 1100000 {
+			socket.NativeEndian.PutUint16(b[2:4], uint16(h.TotalLen))
+			socket.NativeEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
+		} else {
+			binary.BigEndian.PutUint16(b[2:4], uint16(h.TotalLen))
+			binary.BigEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
+		}
+	default:
+		binary.BigEndian.PutUint16(b[2:4], uint16(h.TotalLen))
+		binary.BigEndian.PutUint16(b[6:8], uint16(flagsAndFragOff))
+	}
+	binary.BigEndian.PutUint16(b[4:6], uint16(h.ID))
+	b[8] = byte(h.TTL)
+	b[9] = byte(h.Protocol)
+	binary.BigEndian.PutUint16(b[10:12], uint16(h.Checksum))
+	if ip := h.Src.To4(); ip != nil {
+		copy(b[12:16], ip[:net.IPv4len])
+	}
+	if ip := h.Dst.To4(); ip != nil {
+		copy(b[16:20], ip[:net.IPv4len])
+	} else {
+		return nil, errMissingAddress
+	}
+	if len(h.Options) > 0 {
+		copy(b[HeaderLen:], h.Options)
+	}
+	return b, nil
+}
+
+// Parse parses b as an IPv4 header and sotres the result in h.
+func (h *Header) Parse(b []byte) error {
+	if h == nil || len(b) < HeaderLen {
+		return errHeaderTooShort
+	}
+	hdrlen := int(b[0]&0x0f) << 2
+	if hdrlen > len(b) {
+		return errBufferTooShort
+	}
+	h.Version = int(b[0] >> 4)
+	h.Len = hdrlen
+	h.TOS = int(b[1])
+	h.ID = int(binary.BigEndian.Uint16(b[4:6]))
+	h.TTL = int(b[8])
+	h.Protocol = int(b[9])
+	h.Checksum = int(binary.BigEndian.Uint16(b[10:12]))
+	h.Src = net.IPv4(b[12], b[13], b[14], b[15])
+	h.Dst = net.IPv4(b[16], b[17], b[18], b[19])
+	switch runtime.GOOS {
+	case "darwin", "dragonfly", "netbsd":
+		h.TotalLen = int(socket.NativeEndian.Uint16(b[2:4])) + hdrlen
+		h.FragOff = int(socket.NativeEndian.Uint16(b[6:8]))
+	case "freebsd":
+		if freebsdVersion < 1100000 {
+			h.TotalLen = int(socket.NativeEndian.Uint16(b[2:4]))
+			if freebsdVersion < 1000000 {
+				h.TotalLen += hdrlen
+			}
+			h.FragOff = int(socket.NativeEndian.Uint16(b[6:8]))
+		} else {
+			h.TotalLen = int(binary.BigEndian.Uint16(b[2:4]))
+			h.FragOff = int(binary.BigEndian.Uint16(b[6:8]))
+		}
+	default:
+		h.TotalLen = int(binary.BigEndian.Uint16(b[2:4]))
+		h.FragOff = int(binary.BigEndian.Uint16(b[6:8]))
+	}
+	h.Flags = HeaderFlags(h.FragOff&0xe000) >> 13
+	h.FragOff = h.FragOff & 0x1fff
+	optlen := hdrlen - HeaderLen
+	if optlen > 0 && len(b) >= hdrlen {
+		if cap(h.Options) < optlen {
+			h.Options = make([]byte, optlen)
+		} else {
+			h.Options = h.Options[:optlen]
+		}
+		copy(h.Options, b[HeaderLen:hdrlen])
+	}
+	return nil
+}
+
+// ParseHeader parses b as an IPv4 header.
+func ParseHeader(b []byte) (*Header, error) {
+	h := new(Header)
+	if err := h.Parse(b); err != nil {
+		return nil, err
+	}
+	return h, nil
+}
diff --git a/vendor/golang.org/x/net/ipv4/helper.go b/vendor/golang.org/x/net/ipv4/helper.go
new file mode 100644
index 0000000..a5052e3
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/helper.go
@@ -0,0 +1,63 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"errors"
+	"net"
+)
+
+var (
+	errMissingAddress           = errors.New("missing address")
+	errMissingHeader            = errors.New("missing header")
+	errHeaderTooShort           = errors.New("header too short")
+	errBufferTooShort           = errors.New("buffer too short")
+	errInvalidConnType          = errors.New("invalid conn type")
+	errOpNoSupport              = errors.New("operation not supported")
+	errNoSuchInterface          = errors.New("no such interface")
+	errNoSuchMulticastInterface = errors.New("no such multicast interface")
+
+	// See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html.
+	freebsdVersion uint32
+)
+
+func boolint(b bool) int {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func netAddrToIP4(a net.Addr) net.IP {
+	switch v := a.(type) {
+	case *net.UDPAddr:
+		if ip := v.IP.To4(); ip != nil {
+			return ip
+		}
+	case *net.IPAddr:
+		if ip := v.IP.To4(); ip != nil {
+			return ip
+		}
+	}
+	return nil
+}
+
+func opAddr(a net.Addr) net.Addr {
+	switch a.(type) {
+	case *net.TCPAddr:
+		if a == nil {
+			return nil
+		}
+	case *net.UDPAddr:
+		if a == nil {
+			return nil
+		}
+	case *net.IPAddr:
+		if a == nil {
+			return nil
+		}
+	}
+	return a
+}
diff --git a/vendor/golang.org/x/net/ipv4/iana.go b/vendor/golang.org/x/net/ipv4/iana.go
new file mode 100644
index 0000000..be10c94
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/iana.go
@@ -0,0 +1,34 @@
+// go generate gen.go
+// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
+
+package ipv4
+
+// Internet Control Message Protocol (ICMP) Parameters, Updated: 2013-04-19
+const (
+	ICMPTypeEchoReply              ICMPType = 0  // Echo Reply
+	ICMPTypeDestinationUnreachable ICMPType = 3  // Destination Unreachable
+	ICMPTypeRedirect               ICMPType = 5  // Redirect
+	ICMPTypeEcho                   ICMPType = 8  // Echo
+	ICMPTypeRouterAdvertisement    ICMPType = 9  // Router Advertisement
+	ICMPTypeRouterSolicitation     ICMPType = 10 // Router Solicitation
+	ICMPTypeTimeExceeded           ICMPType = 11 // Time Exceeded
+	ICMPTypeParameterProblem       ICMPType = 12 // Parameter Problem
+	ICMPTypeTimestamp              ICMPType = 13 // Timestamp
+	ICMPTypeTimestampReply         ICMPType = 14 // Timestamp Reply
+	ICMPTypePhoturis               ICMPType = 40 // Photuris
+)
+
+// Internet Control Message Protocol (ICMP) Parameters, Updated: 2013-04-19
+var icmpTypes = map[ICMPType]string{
+	0:  "echo reply",
+	3:  "destination unreachable",
+	5:  "redirect",
+	8:  "echo",
+	9:  "router advertisement",
+	10: "router solicitation",
+	11: "time exceeded",
+	12: "parameter problem",
+	13: "timestamp",
+	14: "timestamp reply",
+	40: "photuris",
+}
diff --git a/vendor/golang.org/x/net/ipv4/icmp.go b/vendor/golang.org/x/net/ipv4/icmp.go
new file mode 100644
index 0000000..9902bb3
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/icmp.go
@@ -0,0 +1,57 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import "golang.org/x/net/internal/iana"
+
+// An ICMPType represents a type of ICMP message.
+type ICMPType int
+
+func (typ ICMPType) String() string {
+	s, ok := icmpTypes[typ]
+	if !ok {
+		return "<nil>"
+	}
+	return s
+}
+
+// Protocol returns the ICMPv4 protocol number.
+func (typ ICMPType) Protocol() int {
+	return iana.ProtocolICMP
+}
+
+// An ICMPFilter represents an ICMP message filter for incoming
+// packets. The filter belongs to a packet delivery path on a host and
+// it cannot interact with forwarding packets or tunnel-outer packets.
+//
+// Note: RFC 8200 defines a reasonable role model and it works not
+// only for IPv6 but IPv4. A node means a device that implements IP.
+// A router means a node that forwards IP packets not explicitly
+// addressed to itself, and a host means a node that is not a router.
+type ICMPFilter struct {
+	icmpFilter
+}
+
+// Accept accepts incoming ICMP packets including the type field value
+// typ.
+func (f *ICMPFilter) Accept(typ ICMPType) {
+	f.accept(typ)
+}
+
+// Block blocks incoming ICMP packets including the type field value
+// typ.
+func (f *ICMPFilter) Block(typ ICMPType) {
+	f.block(typ)
+}
+
+// SetAll sets the filter action to the filter.
+func (f *ICMPFilter) SetAll(block bool) {
+	f.setAll(block)
+}
+
+// WillBlock reports whether the ICMP type will be blocked.
+func (f *ICMPFilter) WillBlock(typ ICMPType) bool {
+	return f.willBlock(typ)
+}
diff --git a/vendor/golang.org/x/net/ipv4/icmp_linux.go b/vendor/golang.org/x/net/ipv4/icmp_linux.go
new file mode 100644
index 0000000..6e1c5c8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/icmp_linux.go
@@ -0,0 +1,25 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+func (f *icmpFilter) accept(typ ICMPType) {
+	f.Data &^= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpFilter) block(typ ICMPType) {
+	f.Data |= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpFilter) setAll(block bool) {
+	if block {
+		f.Data = 1<<32 - 1
+	} else {
+		f.Data = 0
+	}
+}
+
+func (f *icmpFilter) willBlock(typ ICMPType) bool {
+	return f.Data&(1<<(uint32(typ)&31)) != 0
+}
diff --git a/vendor/golang.org/x/net/ipv4/icmp_stub.go b/vendor/golang.org/x/net/ipv4/icmp_stub.go
new file mode 100644
index 0000000..21bb29a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/icmp_stub.go
@@ -0,0 +1,25 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !linux
+
+package ipv4
+
+const sizeofICMPFilter = 0x0
+
+type icmpFilter struct {
+}
+
+func (f *icmpFilter) accept(typ ICMPType) {
+}
+
+func (f *icmpFilter) block(typ ICMPType) {
+}
+
+func (f *icmpFilter) setAll(block bool) {
+}
+
+func (f *icmpFilter) willBlock(typ ICMPType) bool {
+	return false
+}
diff --git a/vendor/golang.org/x/net/ipv4/packet.go b/vendor/golang.org/x/net/ipv4/packet.go
new file mode 100644
index 0000000..f00f5b0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/packet.go
@@ -0,0 +1,69 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the ReadFrom and WriteTo methods of RawConn
+// are not implemented.
+
+// A packetHandler represents the IPv4 datagram handler.
+type packetHandler struct {
+	*net.IPConn
+	*socket.Conn
+	rawOpt
+}
+
+func (c *packetHandler) ok() bool { return c != nil && c.IPConn != nil && c.Conn != nil }
+
+// ReadFrom reads an IPv4 datagram from the endpoint c, copying the
+// datagram into b. It returns the received datagram as the IPv4
+// header h, the payload p and the control message cm.
+func (c *packetHandler) ReadFrom(b []byte) (h *Header, p []byte, cm *ControlMessage, err error) {
+	if !c.ok() {
+		return nil, nil, nil, syscall.EINVAL
+	}
+	return c.readFrom(b)
+}
+
+func slicePacket(b []byte) (h, p []byte, err error) {
+	if len(b) < HeaderLen {
+		return nil, nil, errHeaderTooShort
+	}
+	hdrlen := int(b[0]&0x0f) << 2
+	return b[:hdrlen], b[hdrlen:], nil
+}
+
+// WriteTo writes an IPv4 datagram through the endpoint c, copying the
+// datagram from the IPv4 header h and the payload p. The control
+// message cm allows the datagram path and the outgoing interface to be
+// specified.  Currently only Darwin and Linux support this. The cm
+// may be nil if control of the outgoing datagram is not required.
+//
+// The IPv4 header h must contain appropriate fields that include:
+//
+//	Version       = <must be specified>
+//	Len           = <must be specified>
+//	TOS           = <must be specified>
+//	TotalLen      = <must be specified>
+//	ID            = platform sets an appropriate value if ID is zero
+//	FragOff       = <must be specified>
+//	TTL           = <must be specified>
+//	Protocol      = <must be specified>
+//	Checksum      = platform sets an appropriate value if Checksum is zero
+//	Src           = platform sets an appropriate value if Src is nil
+//	Dst           = <must be specified>
+//	Options       = optional
+func (c *packetHandler) WriteTo(h *Header, p []byte, cm *ControlMessage) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	return c.writeTo(h, p, cm)
+}
diff --git a/vendor/golang.org/x/net/ipv4/packet_go1_8.go b/vendor/golang.org/x/net/ipv4/packet_go1_8.go
new file mode 100644
index 0000000..b47d186
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/packet_go1_8.go
@@ -0,0 +1,56 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.9
+
+package ipv4
+
+import "net"
+
+func (c *packetHandler) readFrom(b []byte) (h *Header, p []byte, cm *ControlMessage, err error) {
+	c.rawOpt.RLock()
+	oob := NewControlMessage(c.rawOpt.cflags)
+	c.rawOpt.RUnlock()
+	n, nn, _, src, err := c.ReadMsgIP(b, oob)
+	if err != nil {
+		return nil, nil, nil, err
+	}
+	var hs []byte
+	if hs, p, err = slicePacket(b[:n]); err != nil {
+		return nil, nil, nil, err
+	}
+	if h, err = ParseHeader(hs); err != nil {
+		return nil, nil, nil, err
+	}
+	if nn > 0 {
+		cm = new(ControlMessage)
+		if err := cm.Parse(oob[:nn]); err != nil {
+			return nil, nil, nil, err
+		}
+	}
+	if src != nil && cm != nil {
+		cm.Src = src.IP
+	}
+	return
+}
+
+func (c *packetHandler) writeTo(h *Header, p []byte, cm *ControlMessage) error {
+	oob := cm.Marshal()
+	wh, err := h.Marshal()
+	if err != nil {
+		return err
+	}
+	dst := new(net.IPAddr)
+	if cm != nil {
+		if ip := cm.Dst.To4(); ip != nil {
+			dst.IP = ip
+		}
+	}
+	if dst.IP == nil {
+		dst.IP = h.Dst
+	}
+	wh = append(wh, p...)
+	_, _, err = c.WriteMsgIP(wh, oob, dst)
+	return err
+}
diff --git a/vendor/golang.org/x/net/ipv4/packet_go1_9.go b/vendor/golang.org/x/net/ipv4/packet_go1_9.go
new file mode 100644
index 0000000..082c36d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/packet_go1_9.go
@@ -0,0 +1,67 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (c *packetHandler) readFrom(b []byte) (h *Header, p []byte, cm *ControlMessage, err error) {
+	c.rawOpt.RLock()
+	m := socket.Message{
+		Buffers: [][]byte{b},
+		OOB:     NewControlMessage(c.rawOpt.cflags),
+	}
+	c.rawOpt.RUnlock()
+	if err := c.RecvMsg(&m, 0); err != nil {
+		return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+	}
+	var hs []byte
+	if hs, p, err = slicePacket(b[:m.N]); err != nil {
+		return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+	}
+	if h, err = ParseHeader(hs); err != nil {
+		return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+	}
+	if m.NN > 0 {
+		cm = new(ControlMessage)
+		if err := cm.Parse(m.OOB[:m.NN]); err != nil {
+			return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+		}
+	}
+	if src, ok := m.Addr.(*net.IPAddr); ok && cm != nil {
+		cm.Src = src.IP
+	}
+	return
+}
+
+func (c *packetHandler) writeTo(h *Header, p []byte, cm *ControlMessage) error {
+	m := socket.Message{
+		OOB: cm.Marshal(),
+	}
+	wh, err := h.Marshal()
+	if err != nil {
+		return err
+	}
+	m.Buffers = [][]byte{wh, p}
+	dst := new(net.IPAddr)
+	if cm != nil {
+		if ip := cm.Dst.To4(); ip != nil {
+			dst.IP = ip
+		}
+	}
+	if dst.IP == nil {
+		dst.IP = h.Dst
+	}
+	m.Addr = dst
+	if err := c.SendMsg(&m, 0); err != nil {
+		return &net.OpError{Op: "write", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Addr: opAddr(dst), Err: err}
+	}
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv4/payload.go b/vendor/golang.org/x/net/ipv4/payload.go
new file mode 100644
index 0000000..f95f811
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/payload.go
@@ -0,0 +1,23 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the ControlMessage for ReadFrom and WriteTo
+// methods of PacketConn is not implemented.
+
+// A payloadHandler represents the IPv4 datagram payload handler.
+type payloadHandler struct {
+	net.PacketConn
+	*socket.Conn
+	rawOpt
+}
+
+func (c *payloadHandler) ok() bool { return c != nil && c.PacketConn != nil && c.Conn != nil }
diff --git a/vendor/golang.org/x/net/ipv4/payload_cmsg.go b/vendor/golang.org/x/net/ipv4/payload_cmsg.go
new file mode 100644
index 0000000..3f06d76
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/payload_cmsg.go
@@ -0,0 +1,36 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !nacl,!plan9,!windows
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+)
+
+// ReadFrom reads a payload of the received IPv4 datagram, from the
+// endpoint c, copying the payload into b. It returns the number of
+// bytes copied into b, the control message cm and the source address
+// src of the received datagram.
+func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	if !c.ok() {
+		return 0, nil, nil, syscall.EINVAL
+	}
+	return c.readFrom(b)
+}
+
+// WriteTo writes a payload of the IPv4 datagram, to the destination
+// address dst through the endpoint c, copying the payload from b. It
+// returns the number of bytes written. The control message cm allows
+// the datagram path and the outgoing interface to be specified.
+// Currently only Darwin and Linux support this. The cm may be nil if
+// control of the outgoing datagram is not required.
+func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	return c.writeTo(b, cm, dst)
+}
diff --git a/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go b/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go
new file mode 100644
index 0000000..d26ccd9
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_8.go
@@ -0,0 +1,59 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.9
+// +build !nacl,!plan9,!windows
+
+package ipv4
+
+import "net"
+
+func (c *payloadHandler) readFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	c.rawOpt.RLock()
+	oob := NewControlMessage(c.rawOpt.cflags)
+	c.rawOpt.RUnlock()
+	var nn int
+	switch c := c.PacketConn.(type) {
+	case *net.UDPConn:
+		if n, nn, _, src, err = c.ReadMsgUDP(b, oob); err != nil {
+			return 0, nil, nil, err
+		}
+	case *net.IPConn:
+		nb := make([]byte, maxHeaderLen+len(b))
+		if n, nn, _, src, err = c.ReadMsgIP(nb, oob); err != nil {
+			return 0, nil, nil, err
+		}
+		hdrlen := int(nb[0]&0x0f) << 2
+		copy(b, nb[hdrlen:])
+		n -= hdrlen
+	default:
+		return 0, nil, nil, &net.OpError{Op: "read", Net: c.LocalAddr().Network(), Source: c.LocalAddr(), Err: errInvalidConnType}
+	}
+	if nn > 0 {
+		cm = new(ControlMessage)
+		if err = cm.Parse(oob[:nn]); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+	}
+	if cm != nil {
+		cm.Src = netAddrToIP4(src)
+	}
+	return
+}
+
+func (c *payloadHandler) writeTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	oob := cm.Marshal()
+	if dst == nil {
+		return 0, &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errMissingAddress}
+	}
+	switch c := c.PacketConn.(type) {
+	case *net.UDPConn:
+		n, _, err = c.WriteMsgUDP(b, oob, dst.(*net.UDPAddr))
+	case *net.IPConn:
+		n, _, err = c.WriteMsgIP(b, oob, dst.(*net.IPAddr))
+	default:
+		return 0, &net.OpError{Op: "write", Net: c.LocalAddr().Network(), Source: c.LocalAddr(), Addr: opAddr(dst), Err: errInvalidConnType}
+	}
+	return
+}
diff --git a/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_9.go b/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_9.go
new file mode 100644
index 0000000..2f19311
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/payload_cmsg_go1_9.go
@@ -0,0 +1,67 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build !nacl,!plan9,!windows
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (c *payloadHandler) readFrom(b []byte) (int, *ControlMessage, net.Addr, error) {
+	c.rawOpt.RLock()
+	m := socket.Message{
+		OOB: NewControlMessage(c.rawOpt.cflags),
+	}
+	c.rawOpt.RUnlock()
+	switch c.PacketConn.(type) {
+	case *net.UDPConn:
+		m.Buffers = [][]byte{b}
+		if err := c.RecvMsg(&m, 0); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+	case *net.IPConn:
+		h := make([]byte, HeaderLen)
+		m.Buffers = [][]byte{h, b}
+		if err := c.RecvMsg(&m, 0); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		hdrlen := int(h[0]&0x0f) << 2
+		if hdrlen > len(h) {
+			d := hdrlen - len(h)
+			copy(b, b[d:])
+			m.N -= d
+		} else {
+			m.N -= hdrlen
+		}
+	default:
+		return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errInvalidConnType}
+	}
+	var cm *ControlMessage
+	if m.NN > 0 {
+		cm = new(ControlMessage)
+		if err := cm.Parse(m.OOB[:m.NN]); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		cm.Src = netAddrToIP4(m.Addr)
+	}
+	return m.N, cm, m.Addr, nil
+}
+
+func (c *payloadHandler) writeTo(b []byte, cm *ControlMessage, dst net.Addr) (int, error) {
+	m := socket.Message{
+		Buffers: [][]byte{b},
+		OOB:     cm.Marshal(),
+		Addr:    dst,
+	}
+	err := c.SendMsg(&m, 0)
+	if err != nil {
+		err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Addr: opAddr(dst), Err: err}
+	}
+	return m.N, err
+}
diff --git a/vendor/golang.org/x/net/ipv4/payload_nocmsg.go b/vendor/golang.org/x/net/ipv4/payload_nocmsg.go
new file mode 100644
index 0000000..3926de7
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/payload_nocmsg.go
@@ -0,0 +1,42 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build nacl plan9 windows
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+)
+
+// ReadFrom reads a payload of the received IPv4 datagram, from the
+// endpoint c, copying the payload into b. It returns the number of
+// bytes copied into b, the control message cm and the source address
+// src of the received datagram.
+func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	if !c.ok() {
+		return 0, nil, nil, syscall.EINVAL
+	}
+	if n, src, err = c.PacketConn.ReadFrom(b); err != nil {
+		return 0, nil, nil, err
+	}
+	return
+}
+
+// WriteTo writes a payload of the IPv4 datagram, to the destination
+// address dst through the endpoint c, copying the payload from b. It
+// returns the number of bytes written. The control message cm allows
+// the datagram path and the outgoing interface to be specified.
+// Currently only Darwin and Linux support this. The cm may be nil if
+// control of the outgoing datagram is not required.
+func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	if dst == nil {
+		return 0, errMissingAddress
+	}
+	return c.PacketConn.WriteTo(b, dst)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sockopt.go b/vendor/golang.org/x/net/ipv4/sockopt.go
new file mode 100644
index 0000000..22e90c0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sockopt.go
@@ -0,0 +1,44 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import "golang.org/x/net/internal/socket"
+
+// Sticky socket options
+const (
+	ssoTOS                = iota // header field for unicast packet
+	ssoTTL                       // header field for unicast packet
+	ssoMulticastTTL              // header field for multicast packet
+	ssoMulticastInterface        // outbound interface for multicast packet
+	ssoMulticastLoopback         // loopback for multicast packet
+	ssoReceiveTTL                // header field on received packet
+	ssoReceiveDst                // header field on received packet
+	ssoReceiveInterface          // inbound interface on received packet
+	ssoPacketInfo                // incbound or outbound packet path
+	ssoHeaderPrepend             // ipv4 header prepend
+	ssoStripHeader               // strip ipv4 header
+	ssoICMPFilter                // icmp filter
+	ssoJoinGroup                 // any-source multicast
+	ssoLeaveGroup                // any-source multicast
+	ssoJoinSourceGroup           // source-specific multicast
+	ssoLeaveSourceGroup          // source-specific multicast
+	ssoBlockSourceGroup          // any-source or source-specific multicast
+	ssoUnblockSourceGroup        // any-source or source-specific multicast
+	ssoAttachFilter              // attach BPF for filtering inbound traffic
+)
+
+// Sticky socket option value types
+const (
+	ssoTypeIPMreq = iota + 1
+	ssoTypeIPMreqn
+	ssoTypeGroupReq
+	ssoTypeGroupSourceReq
+)
+
+// A sockOpt represents a binding for sticky socket option.
+type sockOpt struct {
+	socket.Option
+	typ int // hint for option value type; optional
+}
diff --git a/vendor/golang.org/x/net/ipv4/sockopt_posix.go b/vendor/golang.org/x/net/ipv4/sockopt_posix.go
new file mode 100644
index 0000000..e96955b
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sockopt_posix.go
@@ -0,0 +1,71 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package ipv4
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
+	switch so.typ {
+	case ssoTypeIPMreqn:
+		return so.getIPMreqn(c)
+	default:
+		return so.getMulticastIf(c)
+	}
+}
+
+func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
+	switch so.typ {
+	case ssoTypeIPMreqn:
+		return so.setIPMreqn(c, ifi, nil)
+	default:
+		return so.setMulticastIf(c, ifi)
+	}
+}
+
+func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
+	b := make([]byte, so.Len)
+	n, err := so.Get(c, b)
+	if err != nil {
+		return nil, err
+	}
+	if n != sizeofICMPFilter {
+		return nil, errOpNoSupport
+	}
+	return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil
+}
+
+func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
+	b := (*[sizeofICMPFilter]byte)(unsafe.Pointer(f))[:sizeofICMPFilter]
+	return so.Set(c, b)
+}
+
+func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	switch so.typ {
+	case ssoTypeIPMreq:
+		return so.setIPMreq(c, ifi, grp)
+	case ssoTypeIPMreqn:
+		return so.setIPMreqn(c, ifi, grp)
+	case ssoTypeGroupReq:
+		return so.setGroupReq(c, ifi, grp)
+	default:
+		return errOpNoSupport
+	}
+}
+
+func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	return so.setGroupSourceReq(c, ifi, grp, src)
+}
+
+func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
+	return so.setAttachFilter(c, f)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sockopt_stub.go b/vendor/golang.org/x/net/ipv4/sockopt_stub.go
new file mode 100644
index 0000000..23249b7
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sockopt_stub.go
@@ -0,0 +1,42 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
+	return nil, errOpNoSupport
+}
+
+func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
+	return nil, errOpNoSupport
+}
+
+func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_asmreq.go b/vendor/golang.org/x/net/ipv4/sys_asmreq.go
new file mode 100644
index 0000000..0388cba
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_asmreq.go
@@ -0,0 +1,119 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd solaris windows
+
+package ipv4
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setIPMreq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	mreq := ipMreq{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}}
+	if err := setIPMreqInterface(&mreq, ifi); err != nil {
+		return err
+	}
+	b := (*[sizeofIPMreq]byte)(unsafe.Pointer(&mreq))[:sizeofIPMreq]
+	return so.Set(c, b)
+}
+
+func (so *sockOpt) getMulticastIf(c *socket.Conn) (*net.Interface, error) {
+	var b [4]byte
+	if _, err := so.Get(c, b[:]); err != nil {
+		return nil, err
+	}
+	ifi, err := netIP4ToInterface(net.IPv4(b[0], b[1], b[2], b[3]))
+	if err != nil {
+		return nil, err
+	}
+	return ifi, nil
+}
+
+func (so *sockOpt) setMulticastIf(c *socket.Conn, ifi *net.Interface) error {
+	ip, err := netInterfaceToIP4(ifi)
+	if err != nil {
+		return err
+	}
+	var b [4]byte
+	copy(b[:], ip)
+	return so.Set(c, b[:])
+}
+
+func setIPMreqInterface(mreq *ipMreq, ifi *net.Interface) error {
+	if ifi == nil {
+		return nil
+	}
+	ifat, err := ifi.Addrs()
+	if err != nil {
+		return err
+	}
+	for _, ifa := range ifat {
+		switch ifa := ifa.(type) {
+		case *net.IPAddr:
+			if ip := ifa.IP.To4(); ip != nil {
+				copy(mreq.Interface[:], ip)
+				return nil
+			}
+		case *net.IPNet:
+			if ip := ifa.IP.To4(); ip != nil {
+				copy(mreq.Interface[:], ip)
+				return nil
+			}
+		}
+	}
+	return errNoSuchInterface
+}
+
+func netIP4ToInterface(ip net.IP) (*net.Interface, error) {
+	ift, err := net.Interfaces()
+	if err != nil {
+		return nil, err
+	}
+	for _, ifi := range ift {
+		ifat, err := ifi.Addrs()
+		if err != nil {
+			return nil, err
+		}
+		for _, ifa := range ifat {
+			switch ifa := ifa.(type) {
+			case *net.IPAddr:
+				if ip.Equal(ifa.IP) {
+					return &ifi, nil
+				}
+			case *net.IPNet:
+				if ip.Equal(ifa.IP) {
+					return &ifi, nil
+				}
+			}
+		}
+	}
+	return nil, errNoSuchInterface
+}
+
+func netInterfaceToIP4(ifi *net.Interface) (net.IP, error) {
+	if ifi == nil {
+		return net.IPv4zero.To4(), nil
+	}
+	ifat, err := ifi.Addrs()
+	if err != nil {
+		return nil, err
+	}
+	for _, ifa := range ifat {
+		switch ifa := ifa.(type) {
+		case *net.IPAddr:
+			if ip := ifa.IP.To4(); ip != nil {
+				return ip, nil
+			}
+		case *net.IPNet:
+			if ip := ifa.IP.To4(); ip != nil {
+				return ip, nil
+			}
+		}
+	}
+	return nil, errNoSuchInterface
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_asmreq_stub.go b/vendor/golang.org/x/net/ipv4/sys_asmreq_stub.go
new file mode 100644
index 0000000..f391920
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_asmreq_stub.go
@@ -0,0 +1,25 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!netbsd,!openbsd,!solaris,!windows
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setIPMreq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) getMulticastIf(c *socket.Conn) (*net.Interface, error) {
+	return nil, errOpNoSupport
+}
+
+func (so *sockOpt) setMulticastIf(c *socket.Conn, ifi *net.Interface) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_asmreqn.go b/vendor/golang.org/x/net/ipv4/sys_asmreqn.go
new file mode 100644
index 0000000..1f24f69
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_asmreqn.go
@@ -0,0 +1,42 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin freebsd linux
+
+package ipv4
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) getIPMreqn(c *socket.Conn) (*net.Interface, error) {
+	b := make([]byte, so.Len)
+	if _, err := so.Get(c, b); err != nil {
+		return nil, err
+	}
+	mreqn := (*ipMreqn)(unsafe.Pointer(&b[0]))
+	if mreqn.Ifindex == 0 {
+		return nil, nil
+	}
+	ifi, err := net.InterfaceByIndex(int(mreqn.Ifindex))
+	if err != nil {
+		return nil, err
+	}
+	return ifi, nil
+}
+
+func (so *sockOpt) setIPMreqn(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	var mreqn ipMreqn
+	if ifi != nil {
+		mreqn.Ifindex = int32(ifi.Index)
+	}
+	if grp != nil {
+		mreqn.Multiaddr = [4]byte{grp[0], grp[1], grp[2], grp[3]}
+	}
+	b := (*[sizeofIPMreqn]byte)(unsafe.Pointer(&mreqn))[:sizeofIPMreqn]
+	return so.Set(c, b)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_asmreqn_stub.go b/vendor/golang.org/x/net/ipv4/sys_asmreqn_stub.go
new file mode 100644
index 0000000..0711d3d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_asmreqn_stub.go
@@ -0,0 +1,21 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!freebsd,!linux
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) getIPMreqn(c *socket.Conn) (*net.Interface, error) {
+	return nil, errOpNoSupport
+}
+
+func (so *sockOpt) setIPMreqn(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_bpf.go b/vendor/golang.org/x/net/ipv4/sys_bpf.go
new file mode 100644
index 0000000..9f30b73
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_bpf.go
@@ -0,0 +1,23 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+
+package ipv4
+
+import (
+	"unsafe"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
+	prog := sockFProg{
+		Len:    uint16(len(f)),
+		Filter: (*sockFilter)(unsafe.Pointer(&f[0])),
+	}
+	b := (*[sizeofSockFprog]byte)(unsafe.Pointer(&prog))[:sizeofSockFprog]
+	return so.Set(c, b)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_bpf_stub.go b/vendor/golang.org/x/net/ipv4/sys_bpf_stub.go
new file mode 100644
index 0000000..9a21320
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_bpf_stub.go
@@ -0,0 +1,16 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !linux
+
+package ipv4
+
+import (
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_bsd.go b/vendor/golang.org/x/net/ipv4/sys_bsd.go
new file mode 100644
index 0000000..58256dd
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_bsd.go
@@ -0,0 +1,37 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build netbsd openbsd
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTTL:       {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
+		ctlDst:       {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
+		ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 1}},
+		ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
+		ssoReceiveDst:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVDSTADDR, Len: 4}},
+		ssoReceiveInterface:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVIF, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+	}
+)
diff --git a/vendor/golang.org/x/net/ipv4/sys_darwin.go b/vendor/golang.org/x/net/ipv4/sys_darwin.go
new file mode 100644
index 0000000..e8fb191
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_darwin.go
@@ -0,0 +1,93 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"strconv"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTTL:       {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
+		ctlDst:       {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
+		ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
+		ssoReceiveDst:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVDSTADDR, Len: 4}},
+		ssoReceiveInterface:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVIF, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoStripHeader:        {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_STRIPHDR, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+	}
+)
+
+func init() {
+	// Seems like kern.osreldate is veiled on latest OS X. We use
+	// kern.osrelease instead.
+	s, err := syscall.Sysctl("kern.osrelease")
+	if err != nil {
+		return
+	}
+	ss := strings.Split(s, ".")
+	if len(ss) == 0 {
+		return
+	}
+	// The IP_PKTINFO and protocol-independent multicast API were
+	// introduced in OS X 10.7 (Darwin 11). But it looks like
+	// those features require OS X 10.8 (Darwin 12) or above.
+	// See http://support.apple.com/kb/HT1633.
+	if mjver, err := strconv.Atoi(ss[0]); err != nil || mjver < 12 {
+		return
+	}
+	ctlOpts[ctlPacketInfo].name = sysIP_PKTINFO
+	ctlOpts[ctlPacketInfo].length = sizeofInetPktinfo
+	ctlOpts[ctlPacketInfo].marshal = marshalPacketInfo
+	ctlOpts[ctlPacketInfo].parse = parsePacketInfo
+	sockOpts[ssoPacketInfo] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVPKTINFO, Len: 4}}
+	sockOpts[ssoMulticastInterface] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: sizeofIPMreqn}, typ: ssoTypeIPMreqn}
+	sockOpts[ssoJoinGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
+	sockOpts[ssoLeaveGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
+	sockOpts[ssoJoinSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+	sockOpts[ssoLeaveSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+	sockOpts[ssoBlockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+	sockOpts[ssoUnblockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+}
+
+func (pi *inetPktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
+	sa.Len = sizeofSockaddrInet
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
+	sa.Len = sizeofSockaddrInet
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 132))
+	sa.Len = sizeofSockaddrInet
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_dragonfly.go b/vendor/golang.org/x/net/ipv4/sys_dragonfly.go
new file mode 100644
index 0000000..859764f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_dragonfly.go
@@ -0,0 +1,35 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTTL:       {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
+		ctlDst:       {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
+		ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
+		ssoReceiveDst:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVDSTADDR, Len: 4}},
+		ssoReceiveInterface:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVIF, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+	}
+)
diff --git a/vendor/golang.org/x/net/ipv4/sys_freebsd.go b/vendor/golang.org/x/net/ipv4/sys_freebsd.go
new file mode 100644
index 0000000..b800324
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_freebsd.go
@@ -0,0 +1,76 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"runtime"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTTL:       {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
+		ctlDst:       {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
+		ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
+		ssoReceiveDst:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVDSTADDR, Len: 4}},
+		ssoReceiveInterface:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVIF, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoJoinSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+	}
+)
+
+func init() {
+	freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
+	if freebsdVersion >= 1000000 {
+		sockOpts[ssoMulticastInterface] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: sizeofIPMreqn}, typ: ssoTypeIPMreqn}
+	}
+	if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
+		archs, _ := syscall.Sysctl("kern.supported_archs")
+		for _, s := range strings.Fields(archs) {
+			if s == "amd64" {
+				freebsd32o64 = true
+				break
+			}
+		}
+	}
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(&gr.Group))
+	sa.Len = sizeofSockaddrInet
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(&gsr.Group))
+	sa.Len = sizeofSockaddrInet
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet)(unsafe.Pointer(&gsr.Source))
+	sa.Len = sizeofSockaddrInet
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_linux.go b/vendor/golang.org/x/net/ipv4/sys_linux.go
new file mode 100644
index 0000000..60defe1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_linux.go
@@ -0,0 +1,59 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTTL:        {sysIP_TTL, 1, marshalTTL, parseTTL},
+		ctlPacketInfo: {sysIP_PKTINFO, sizeofInetPktinfo, marshalPacketInfo, parsePacketInfo},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 4}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: sizeofIPMreqn}, typ: ssoTypeIPMreqn},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
+		ssoPacketInfo:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_PKTINFO, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoICMPFilter:         {Option: socket.Option{Level: iana.ProtocolReserved, Name: sysICMP_FILTER, Len: sizeofICMPFilter}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoJoinSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoAttachFilter:       {Option: socket.Option{Level: sysSOL_SOCKET, Name: sysSO_ATTACH_FILTER, Len: sizeofSockFprog}},
+	}
+)
+
+func (pi *inetPktinfo) setIfindex(i int) {
+	pi.Ifindex = int32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(&gr.Group))
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(&gsr.Group))
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet)(unsafe.Pointer(&gsr.Source))
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_solaris.go b/vendor/golang.org/x/net/ipv4/sys_solaris.go
new file mode 100644
index 0000000..832fef1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_solaris.go
@@ -0,0 +1,57 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"net"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTTL:        {sysIP_RECVTTL, 4, marshalTTL, parseTTL},
+		ctlPacketInfo: {sysIP_PKTINFO, sizeofInetPktinfo, marshalPacketInfo, parsePacketInfo},
+	}
+
+	sockOpts = map[int]sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 1}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 1}},
+		ssoReceiveTTL:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVTTL, Len: 4}},
+		ssoPacketInfo:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_RECVPKTINFO, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoJoinSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:   {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+	}
+)
+
+func (pi *inetPktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 260))
+	sa.Family = syscall.AF_INET
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_ssmreq.go b/vendor/golang.org/x/net/ipv4/sys_ssmreq.go
new file mode 100644
index 0000000..ae5704e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_ssmreq.go
@@ -0,0 +1,54 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin freebsd linux solaris
+
+package ipv4
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/socket"
+)
+
+var freebsd32o64 bool
+
+func (so *sockOpt) setGroupReq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	var gr groupReq
+	if ifi != nil {
+		gr.Interface = uint32(ifi.Index)
+	}
+	gr.setGroup(grp)
+	var b []byte
+	if freebsd32o64 {
+		var d [sizeofGroupReq + 4]byte
+		s := (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))
+		copy(d[:4], s[:4])
+		copy(d[8:], s[4:])
+		b = d[:]
+	} else {
+		b = (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))[:sizeofGroupReq]
+	}
+	return so.Set(c, b)
+}
+
+func (so *sockOpt) setGroupSourceReq(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	var gsr groupSourceReq
+	if ifi != nil {
+		gsr.Interface = uint32(ifi.Index)
+	}
+	gsr.setSourceGroup(grp, src)
+	var b []byte
+	if freebsd32o64 {
+		var d [sizeofGroupSourceReq + 4]byte
+		s := (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
+		copy(d[:4], s[:4])
+		copy(d[8:], s[4:])
+		b = d[:]
+	} else {
+		b = (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))[:sizeofGroupSourceReq]
+	}
+	return so.Set(c, b)
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_ssmreq_stub.go b/vendor/golang.org/x/net/ipv4/sys_ssmreq_stub.go
new file mode 100644
index 0000000..e6b7623
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_ssmreq_stub.go
@@ -0,0 +1,21 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!freebsd,!linux,!solaris
+
+package ipv4
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setGroupReq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setGroupSourceReq(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv4/sys_stub.go b/vendor/golang.org/x/net/ipv4/sys_stub.go
new file mode 100644
index 0000000..4f07647
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_stub.go
@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv4
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{}
+
+	sockOpts = map[int]*sockOpt{}
+)
diff --git a/vendor/golang.org/x/net/ipv4/sys_windows.go b/vendor/golang.org/x/net/ipv4/sys_windows.go
new file mode 100644
index 0000000..b0913d5
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/sys_windows.go
@@ -0,0 +1,67 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+const (
+	// See ws2tcpip.h.
+	sysIP_OPTIONS                = 0x1
+	sysIP_HDRINCL                = 0x2
+	sysIP_TOS                    = 0x3
+	sysIP_TTL                    = 0x4
+	sysIP_MULTICAST_IF           = 0x9
+	sysIP_MULTICAST_TTL          = 0xa
+	sysIP_MULTICAST_LOOP         = 0xb
+	sysIP_ADD_MEMBERSHIP         = 0xc
+	sysIP_DROP_MEMBERSHIP        = 0xd
+	sysIP_DONTFRAGMENT           = 0xe
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0xf
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x10
+	sysIP_PKTINFO                = 0x13
+
+	sizeofInetPktinfo  = 0x8
+	sizeofIPMreq       = 0x8
+	sizeofIPMreqSource = 0xc
+)
+
+type inetPktinfo struct {
+	Addr    [4]byte
+	Ifindex int32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte
+	Interface [4]byte
+}
+
+type ipMreqSource struct {
+	Multiaddr  [4]byte
+	Sourceaddr [4]byte
+	Interface  [4]byte
+}
+
+// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms738586(v=vs.85).aspx
+var (
+	ctlOpts = [ctlMax]ctlOpt{}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
+		ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
+		ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 4}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
+		ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
+	}
+)
+
+func (pi *inetPktinfo) setIfindex(i int) {
+	pi.Ifindex = int32(i)
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_darwin.go b/vendor/golang.org/x/net/ipv4/zsys_darwin.go
new file mode 100644
index 0000000..c07cc88
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_darwin.go
@@ -0,0 +1,99 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x14
+	sysIP_STRIPHDR    = 0x17
+	sysIP_RECVTTL     = 0x18
+	sysIP_BOUND_IF    = 0x19
+	sysIP_PKTINFO     = 0x1a
+	sysIP_RECVPKTINFO = 0x1a
+
+	sysIP_MULTICAST_IF           = 0x9
+	sysIP_MULTICAST_TTL          = 0xa
+	sysIP_MULTICAST_LOOP         = 0xb
+	sysIP_ADD_MEMBERSHIP         = 0xc
+	sysIP_DROP_MEMBERSHIP        = 0xd
+	sysIP_MULTICAST_VIF          = 0xe
+	sysIP_MULTICAST_IFINDEX      = 0x42
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x46
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x47
+	sysIP_BLOCK_SOURCE           = 0x48
+	sysIP_UNBLOCK_SOURCE         = 0x49
+	sysMCAST_JOIN_GROUP          = 0x50
+	sysMCAST_LEAVE_GROUP         = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x53
+	sysMCAST_BLOCK_SOURCE        = 0x54
+	sysMCAST_UNBLOCK_SOURCE      = 0x55
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet    = 0x10
+	sizeofInetPktinfo     = 0xc
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type inetPktinfo struct {
+	Ifindex  uint32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  [4]byte /* in_addr */
+	Sourceaddr [4]byte /* in_addr */
+	Interface  [4]byte /* in_addr */
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+	Pad_cgo_1 [128]byte
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_dragonfly.go b/vendor/golang.org/x/net/ipv4/zsys_dragonfly.go
new file mode 100644
index 0000000..c4365e9
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_dragonfly.go
@@ -0,0 +1,31 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_dragonfly.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x14
+	sysIP_RECVTTL     = 0x41
+
+	sysIP_MULTICAST_IF    = 0x9
+	sysIP_MULTICAST_TTL   = 0xa
+	sysIP_MULTICAST_LOOP  = 0xb
+	sysIP_MULTICAST_VIF   = 0xe
+	sysIP_ADD_MEMBERSHIP  = 0xc
+	sysIP_DROP_MEMBERSHIP = 0xd
+
+	sizeofIPMreq = 0x8
+)
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_freebsd_386.go b/vendor/golang.org/x/net/ipv4/zsys_freebsd_386.go
new file mode 100644
index 0000000..8c4aec9
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_freebsd_386.go
@@ -0,0 +1,93 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_SENDSRCADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x14
+	sysIP_ONESBCAST   = 0x17
+	sysIP_BINDANY     = 0x18
+	sysIP_RECVTTL     = 0x41
+	sysIP_MINTTL      = 0x42
+	sysIP_DONTFRAG    = 0x43
+	sysIP_RECVTOS     = 0x44
+
+	sysIP_MULTICAST_IF           = 0x9
+	sysIP_MULTICAST_TTL          = 0xa
+	sysIP_MULTICAST_LOOP         = 0xb
+	sysIP_ADD_MEMBERSHIP         = 0xc
+	sysIP_DROP_MEMBERSHIP        = 0xd
+	sysIP_MULTICAST_VIF          = 0xe
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x46
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x47
+	sysIP_BLOCK_SOURCE           = 0x48
+	sysIP_UNBLOCK_SOURCE         = 0x49
+	sysMCAST_JOIN_GROUP          = 0x50
+	sysMCAST_LEAVE_GROUP         = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x53
+	sysMCAST_BLOCK_SOURCE        = 0x54
+	sysMCAST_UNBLOCK_SOURCE      = 0x55
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet    = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  [4]byte /* in_addr */
+	Sourceaddr [4]byte /* in_addr */
+	Interface  [4]byte /* in_addr */
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     sockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     sockaddrStorage
+	Source    sockaddrStorage
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_freebsd_amd64.go b/vendor/golang.org/x/net/ipv4/zsys_freebsd_amd64.go
new file mode 100644
index 0000000..4b10b7c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_freebsd_amd64.go
@@ -0,0 +1,95 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_SENDSRCADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x14
+	sysIP_ONESBCAST   = 0x17
+	sysIP_BINDANY     = 0x18
+	sysIP_RECVTTL     = 0x41
+	sysIP_MINTTL      = 0x42
+	sysIP_DONTFRAG    = 0x43
+	sysIP_RECVTOS     = 0x44
+
+	sysIP_MULTICAST_IF           = 0x9
+	sysIP_MULTICAST_TTL          = 0xa
+	sysIP_MULTICAST_LOOP         = 0xb
+	sysIP_ADD_MEMBERSHIP         = 0xc
+	sysIP_DROP_MEMBERSHIP        = 0xd
+	sysIP_MULTICAST_VIF          = 0xe
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x46
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x47
+	sysIP_BLOCK_SOURCE           = 0x48
+	sysIP_UNBLOCK_SOURCE         = 0x49
+	sysMCAST_JOIN_GROUP          = 0x50
+	sysMCAST_LEAVE_GROUP         = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x53
+	sysMCAST_BLOCK_SOURCE        = 0x54
+	sysMCAST_UNBLOCK_SOURCE      = 0x55
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet    = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  [4]byte /* in_addr */
+	Sourceaddr [4]byte /* in_addr */
+	Interface  [4]byte /* in_addr */
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+	Source    sockaddrStorage
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_freebsd_arm.go b/vendor/golang.org/x/net/ipv4/zsys_freebsd_arm.go
new file mode 100644
index 0000000..4b10b7c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_freebsd_arm.go
@@ -0,0 +1,95 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_SENDSRCADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x14
+	sysIP_ONESBCAST   = 0x17
+	sysIP_BINDANY     = 0x18
+	sysIP_RECVTTL     = 0x41
+	sysIP_MINTTL      = 0x42
+	sysIP_DONTFRAG    = 0x43
+	sysIP_RECVTOS     = 0x44
+
+	sysIP_MULTICAST_IF           = 0x9
+	sysIP_MULTICAST_TTL          = 0xa
+	sysIP_MULTICAST_LOOP         = 0xb
+	sysIP_ADD_MEMBERSHIP         = 0xc
+	sysIP_DROP_MEMBERSHIP        = 0xd
+	sysIP_MULTICAST_VIF          = 0xe
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x46
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x47
+	sysIP_BLOCK_SOURCE           = 0x48
+	sysIP_UNBLOCK_SOURCE         = 0x49
+	sysMCAST_JOIN_GROUP          = 0x50
+	sysMCAST_LEAVE_GROUP         = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x53
+	sysMCAST_BLOCK_SOURCE        = 0x54
+	sysMCAST_UNBLOCK_SOURCE      = 0x55
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet    = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet struct {
+	Len    uint8
+	Family uint8
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  [4]byte /* in_addr */
+	Sourceaddr [4]byte /* in_addr */
+	Interface  [4]byte /* in_addr */
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+	Source    sockaddrStorage
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_386.go b/vendor/golang.org/x/net/ipv4/zsys_linux_386.go
new file mode 100644
index 0000000..c0260f0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_386.go
@@ -0,0 +1,148 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_amd64.go b/vendor/golang.org/x/net/ipv4/zsys_linux_amd64.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_amd64.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_arm.go b/vendor/golang.org/x/net/ipv4/zsys_linux_arm.go
new file mode 100644
index 0000000..c0260f0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_arm.go
@@ -0,0 +1,148 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_arm64.go b/vendor/golang.org/x/net/ipv4/zsys_linux_arm64.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_arm64.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_mips.go b/vendor/golang.org/x/net/ipv4/zsys_linux_mips.go
new file mode 100644
index 0000000..c0260f0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_mips.go
@@ -0,0 +1,148 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_mips64.go b/vendor/golang.org/x/net/ipv4/zsys_linux_mips64.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_mips64.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_mips64le.go b/vendor/golang.org/x/net/ipv4/zsys_linux_mips64le.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_mips64le.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_mipsle.go b/vendor/golang.org/x/net/ipv4/zsys_linux_mipsle.go
new file mode 100644
index 0000000..c0260f0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_mipsle.go
@@ -0,0 +1,148 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_ppc.go b/vendor/golang.org/x/net/ipv4/zsys_linux_ppc.go
new file mode 100644
index 0000000..f65bd9a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_ppc.go
@@ -0,0 +1,148 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]uint8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_ppc64.go b/vendor/golang.org/x/net/ipv4/zsys_linux_ppc64.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_ppc64.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_ppc64le.go b/vendor/golang.org/x/net/ipv4/zsys_linux_ppc64le.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_ppc64le.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_linux_s390x.go b/vendor/golang.org/x/net/ipv4/zsys_linux_s390x.go
new file mode 100644
index 0000000..9c967ea
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_linux_s390x.go
@@ -0,0 +1,150 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv4
+
+const (
+	sysIP_TOS             = 0x1
+	sysIP_TTL             = 0x2
+	sysIP_HDRINCL         = 0x3
+	sysIP_OPTIONS         = 0x4
+	sysIP_ROUTER_ALERT    = 0x5
+	sysIP_RECVOPTS        = 0x6
+	sysIP_RETOPTS         = 0x7
+	sysIP_PKTINFO         = 0x8
+	sysIP_PKTOPTIONS      = 0x9
+	sysIP_MTU_DISCOVER    = 0xa
+	sysIP_RECVERR         = 0xb
+	sysIP_RECVTTL         = 0xc
+	sysIP_RECVTOS         = 0xd
+	sysIP_MTU             = 0xe
+	sysIP_FREEBIND        = 0xf
+	sysIP_TRANSPARENT     = 0x13
+	sysIP_RECVRETOPTS     = 0x7
+	sysIP_ORIGDSTADDR     = 0x14
+	sysIP_RECVORIGDSTADDR = 0x14
+	sysIP_MINTTL          = 0x15
+	sysIP_NODEFRAG        = 0x16
+	sysIP_UNICAST_IF      = 0x32
+
+	sysIP_MULTICAST_IF           = 0x20
+	sysIP_MULTICAST_TTL          = 0x21
+	sysIP_MULTICAST_LOOP         = 0x22
+	sysIP_ADD_MEMBERSHIP         = 0x23
+	sysIP_DROP_MEMBERSHIP        = 0x24
+	sysIP_UNBLOCK_SOURCE         = 0x25
+	sysIP_BLOCK_SOURCE           = 0x26
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x27
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x28
+	sysIP_MSFILTER               = 0x29
+	sysMCAST_JOIN_GROUP          = 0x2a
+	sysMCAST_LEAVE_GROUP         = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP   = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP  = 0x2f
+	sysMCAST_BLOCK_SOURCE        = 0x2b
+	sysMCAST_UNBLOCK_SOURCE      = 0x2c
+	sysMCAST_MSFILTER            = 0x30
+	sysIP_MULTICAST_ALL          = 0x31
+
+	sysICMP_FILTER = 0x1
+
+	sysSO_EE_ORIGIN_NONE         = 0x0
+	sysSO_EE_ORIGIN_LOCAL        = 0x1
+	sysSO_EE_ORIGIN_ICMP         = 0x2
+	sysSO_EE_ORIGIN_ICMP6        = 0x3
+	sysSO_EE_ORIGIN_TXSTATUS     = 0x4
+	sysSO_EE_ORIGIN_TIMESTAMPING = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet          = 0x10
+	sizeofInetPktinfo           = 0xc
+	sizeofSockExtendedErr       = 0x10
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqn        = 0xc
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPFilter = 0x4
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	X__pad [8]uint8
+}
+
+type inetPktinfo struct {
+	Ifindex  int32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type sockExtendedErr struct {
+	Errno  uint32
+	Origin uint8
+	Type   uint8
+	Code   uint8
+	Pad    uint8
+	Info   uint32
+	Data   uint32
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqn struct {
+	Multiaddr [4]byte /* in_addr */
+	Address   [4]byte /* in_addr */
+	Ifindex   int32
+}
+
+type ipMreqSource struct {
+	Multiaddr  uint32
+	Interface  uint32
+	Sourceaddr uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpFilter struct {
+	Data uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_netbsd.go b/vendor/golang.org/x/net/ipv4/zsys_netbsd.go
new file mode 100644
index 0000000..fd3624d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_netbsd.go
@@ -0,0 +1,30 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_netbsd.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x14
+	sysIP_RECVTTL     = 0x17
+
+	sysIP_MULTICAST_IF    = 0x9
+	sysIP_MULTICAST_TTL   = 0xa
+	sysIP_MULTICAST_LOOP  = 0xb
+	sysIP_ADD_MEMBERSHIP  = 0xc
+	sysIP_DROP_MEMBERSHIP = 0xd
+
+	sizeofIPMreq = 0x8
+)
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_openbsd.go b/vendor/golang.org/x/net/ipv4/zsys_openbsd.go
new file mode 100644
index 0000000..12f36be
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_openbsd.go
@@ -0,0 +1,30 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_openbsd.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x1e
+	sysIP_RECVTTL     = 0x1f
+
+	sysIP_MULTICAST_IF    = 0x9
+	sysIP_MULTICAST_TTL   = 0xa
+	sysIP_MULTICAST_LOOP  = 0xb
+	sysIP_ADD_MEMBERSHIP  = 0xc
+	sysIP_DROP_MEMBERSHIP = 0xd
+
+	sizeofIPMreq = 0x8
+)
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
diff --git a/vendor/golang.org/x/net/ipv4/zsys_solaris.go b/vendor/golang.org/x/net/ipv4/zsys_solaris.go
new file mode 100644
index 0000000..0a3875c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/zsys_solaris.go
@@ -0,0 +1,100 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_solaris.go
+
+package ipv4
+
+const (
+	sysIP_OPTIONS     = 0x1
+	sysIP_HDRINCL     = 0x2
+	sysIP_TOS         = 0x3
+	sysIP_TTL         = 0x4
+	sysIP_RECVOPTS    = 0x5
+	sysIP_RECVRETOPTS = 0x6
+	sysIP_RECVDSTADDR = 0x7
+	sysIP_RETOPTS     = 0x8
+	sysIP_RECVIF      = 0x9
+	sysIP_RECVSLLA    = 0xa
+	sysIP_RECVTTL     = 0xb
+
+	sysIP_MULTICAST_IF           = 0x10
+	sysIP_MULTICAST_TTL          = 0x11
+	sysIP_MULTICAST_LOOP         = 0x12
+	sysIP_ADD_MEMBERSHIP         = 0x13
+	sysIP_DROP_MEMBERSHIP        = 0x14
+	sysIP_BLOCK_SOURCE           = 0x15
+	sysIP_UNBLOCK_SOURCE         = 0x16
+	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x17
+	sysIP_DROP_SOURCE_MEMBERSHIP = 0x18
+	sysIP_NEXTHOP                = 0x19
+
+	sysIP_PKTINFO     = 0x1a
+	sysIP_RECVPKTINFO = 0x1a
+	sysIP_DONTFRAG    = 0x1b
+
+	sysIP_BOUND_IF      = 0x41
+	sysIP_UNSPEC_SRC    = 0x42
+	sysIP_BROADCAST_TTL = 0x43
+	sysIP_DHCPINIT_IF   = 0x45
+
+	sysIP_REUSEADDR = 0x104
+	sysIP_DONTROUTE = 0x105
+	sysIP_BROADCAST = 0x106
+
+	sysMCAST_JOIN_GROUP         = 0x29
+	sysMCAST_LEAVE_GROUP        = 0x2a
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2d
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2e
+
+	sizeofSockaddrStorage = 0x100
+	sizeofSockaddrInet    = 0x10
+	sizeofInetPktinfo     = 0xc
+
+	sizeofIPMreq         = 0x8
+	sizeofIPMreqSource   = 0xc
+	sizeofGroupReq       = 0x104
+	sizeofGroupSourceReq = 0x204
+)
+
+type sockaddrStorage struct {
+	Family     uint16
+	X_ss_pad1  [6]int8
+	X_ss_align float64
+	X_ss_pad2  [240]int8
+}
+
+type sockaddrInet struct {
+	Family uint16
+	Port   uint16
+	Addr   [4]byte /* in_addr */
+	Zero   [8]int8
+}
+
+type inetPktinfo struct {
+	Ifindex  uint32
+	Spec_dst [4]byte /* in_addr */
+	Addr     [4]byte /* in_addr */
+}
+
+type ipMreq struct {
+	Multiaddr [4]byte /* in_addr */
+	Interface [4]byte /* in_addr */
+}
+
+type ipMreqSource struct {
+	Multiaddr  [4]byte /* in_addr */
+	Sourceaddr [4]byte /* in_addr */
+	Interface  [4]byte /* in_addr */
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [256]byte
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [256]byte
+	Pad_cgo_1 [256]byte
+}
diff --git a/vendor/golang.org/x/net/ipv6/batch.go b/vendor/golang.org/x/net/ipv6/batch.go
new file mode 100644
index 0000000..4f5fe68
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/batch.go
@@ -0,0 +1,119 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+
+package ipv6
+
+import (
+	"net"
+	"runtime"
+	"syscall"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the ReadBatch and WriteBatch methods of
+// PacketConn are not implemented.
+
+// A Message represents an IO message.
+//
+//	type Message struct {
+//		Buffers [][]byte
+//		OOB     []byte
+//		Addr    net.Addr
+//		N       int
+//		NN      int
+//		Flags   int
+//	}
+//
+// The Buffers fields represents a list of contiguous buffers, which
+// can be used for vectored IO, for example, putting a header and a
+// payload in each slice.
+// When writing, the Buffers field must contain at least one byte to
+// write.
+// When reading, the Buffers field will always contain a byte to read.
+//
+// The OOB field contains protocol-specific control or miscellaneous
+// ancillary data known as out-of-band data.
+// It can be nil when not required.
+//
+// The Addr field specifies a destination address when writing.
+// It can be nil when the underlying protocol of the endpoint uses
+// connection-oriented communication.
+// After a successful read, it may contain the source address on the
+// received packet.
+//
+// The N field indicates the number of bytes read or written from/to
+// Buffers.
+//
+// The NN field indicates the number of bytes read or written from/to
+// OOB.
+//
+// The Flags field contains protocol-specific information on the
+// received message.
+type Message = socket.Message
+
+// ReadBatch reads a batch of messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_PEEK.
+//
+// On a successful read it returns the number of messages received, up
+// to len(ms).
+//
+// On Linux, a batch read will be optimized.
+// On other platforms, this method will read only a single message.
+func (c *payloadHandler) ReadBatch(ms []Message, flags int) (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	switch runtime.GOOS {
+	case "linux":
+		n, err := c.RecvMsgs([]socket.Message(ms), flags)
+		if err != nil {
+			err = &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	default:
+		n := 1
+		err := c.RecvMsg(&ms[0], flags)
+		if err != nil {
+			n = 0
+			err = &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	}
+}
+
+// WriteBatch writes a batch of messages.
+//
+// The provided flags is a set of platform-dependent flags, such as
+// syscall.MSG_DONTROUTE.
+//
+// It returns the number of messages written on a successful write.
+//
+// On Linux, a batch write will be optimized.
+// On other platforms, this method will write only a single message.
+func (c *payloadHandler) WriteBatch(ms []Message, flags int) (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	switch runtime.GOOS {
+	case "linux":
+		n, err := c.SendMsgs([]socket.Message(ms), flags)
+		if err != nil {
+			err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	default:
+		n := 1
+		err := c.SendMsg(&ms[0], flags)
+		if err != nil {
+			n = 0
+			err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		return n, err
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/control.go b/vendor/golang.org/x/net/ipv6/control.go
new file mode 100644
index 0000000..2da6444
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control.go
@@ -0,0 +1,187 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"fmt"
+	"net"
+	"sync"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+// Note that RFC 3542 obsoletes RFC 2292 but OS X Snow Leopard and the
+// former still support RFC 2292 only. Please be aware that almost
+// all protocol implementations prohibit using a combination of RFC
+// 2292 and RFC 3542 for some practical reasons.
+
+type rawOpt struct {
+	sync.RWMutex
+	cflags ControlFlags
+}
+
+func (c *rawOpt) set(f ControlFlags)        { c.cflags |= f }
+func (c *rawOpt) clear(f ControlFlags)      { c.cflags &^= f }
+func (c *rawOpt) isset(f ControlFlags) bool { return c.cflags&f != 0 }
+
+// A ControlFlags represents per packet basis IP-level socket option
+// control flags.
+type ControlFlags uint
+
+const (
+	FlagTrafficClass ControlFlags = 1 << iota // pass the traffic class on the received packet
+	FlagHopLimit                              // pass the hop limit on the received packet
+	FlagSrc                                   // pass the source address on the received packet
+	FlagDst                                   // pass the destination address on the received packet
+	FlagInterface                             // pass the interface index on the received packet
+	FlagPathMTU                               // pass the path MTU on the received packet path
+)
+
+const flagPacketInfo = FlagDst | FlagInterface
+
+// A ControlMessage represents per packet basis IP-level socket
+// options.
+type ControlMessage struct {
+	// Receiving socket options: SetControlMessage allows to
+	// receive the options from the protocol stack using ReadFrom
+	// method of PacketConn.
+	//
+	// Specifying socket options: ControlMessage for WriteTo
+	// method of PacketConn allows to send the options to the
+	// protocol stack.
+	//
+	TrafficClass int    // traffic class, must be 1 <= value <= 255 when specifying
+	HopLimit     int    // hop limit, must be 1 <= value <= 255 when specifying
+	Src          net.IP // source address, specifying only
+	Dst          net.IP // destination address, receiving only
+	IfIndex      int    // interface index, must be 1 <= value when specifying
+	NextHop      net.IP // next hop address, specifying only
+	MTU          int    // path MTU, receiving only
+}
+
+func (cm *ControlMessage) String() string {
+	if cm == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("tclass=%#x hoplim=%d src=%v dst=%v ifindex=%d nexthop=%v mtu=%d", cm.TrafficClass, cm.HopLimit, cm.Src, cm.Dst, cm.IfIndex, cm.NextHop, cm.MTU)
+}
+
+// Marshal returns the binary encoding of cm.
+func (cm *ControlMessage) Marshal() []byte {
+	if cm == nil {
+		return nil
+	}
+	var l int
+	tclass := false
+	if ctlOpts[ctlTrafficClass].name > 0 && cm.TrafficClass > 0 {
+		tclass = true
+		l += socket.ControlMessageSpace(ctlOpts[ctlTrafficClass].length)
+	}
+	hoplimit := false
+	if ctlOpts[ctlHopLimit].name > 0 && cm.HopLimit > 0 {
+		hoplimit = true
+		l += socket.ControlMessageSpace(ctlOpts[ctlHopLimit].length)
+	}
+	pktinfo := false
+	if ctlOpts[ctlPacketInfo].name > 0 && (cm.Src.To16() != nil && cm.Src.To4() == nil || cm.IfIndex > 0) {
+		pktinfo = true
+		l += socket.ControlMessageSpace(ctlOpts[ctlPacketInfo].length)
+	}
+	nexthop := false
+	if ctlOpts[ctlNextHop].name > 0 && cm.NextHop.To16() != nil && cm.NextHop.To4() == nil {
+		nexthop = true
+		l += socket.ControlMessageSpace(ctlOpts[ctlNextHop].length)
+	}
+	var b []byte
+	if l > 0 {
+		b = make([]byte, l)
+		bb := b
+		if tclass {
+			bb = ctlOpts[ctlTrafficClass].marshal(bb, cm)
+		}
+		if hoplimit {
+			bb = ctlOpts[ctlHopLimit].marshal(bb, cm)
+		}
+		if pktinfo {
+			bb = ctlOpts[ctlPacketInfo].marshal(bb, cm)
+		}
+		if nexthop {
+			bb = ctlOpts[ctlNextHop].marshal(bb, cm)
+		}
+	}
+	return b
+}
+
+// Parse parses b as a control message and stores the result in cm.
+func (cm *ControlMessage) Parse(b []byte) error {
+	ms, err := socket.ControlMessage(b).Parse()
+	if err != nil {
+		return err
+	}
+	for _, m := range ms {
+		lvl, typ, l, err := m.ParseHeader()
+		if err != nil {
+			return err
+		}
+		if lvl != iana.ProtocolIPv6 {
+			continue
+		}
+		switch {
+		case typ == ctlOpts[ctlTrafficClass].name && l >= ctlOpts[ctlTrafficClass].length:
+			ctlOpts[ctlTrafficClass].parse(cm, m.Data(l))
+		case typ == ctlOpts[ctlHopLimit].name && l >= ctlOpts[ctlHopLimit].length:
+			ctlOpts[ctlHopLimit].parse(cm, m.Data(l))
+		case typ == ctlOpts[ctlPacketInfo].name && l >= ctlOpts[ctlPacketInfo].length:
+			ctlOpts[ctlPacketInfo].parse(cm, m.Data(l))
+		case typ == ctlOpts[ctlPathMTU].name && l >= ctlOpts[ctlPathMTU].length:
+			ctlOpts[ctlPathMTU].parse(cm, m.Data(l))
+		}
+	}
+	return nil
+}
+
+// NewControlMessage returns a new control message.
+//
+// The returned message is large enough for options specified by cf.
+func NewControlMessage(cf ControlFlags) []byte {
+	opt := rawOpt{cflags: cf}
+	var l int
+	if opt.isset(FlagTrafficClass) && ctlOpts[ctlTrafficClass].name > 0 {
+		l += socket.ControlMessageSpace(ctlOpts[ctlTrafficClass].length)
+	}
+	if opt.isset(FlagHopLimit) && ctlOpts[ctlHopLimit].name > 0 {
+		l += socket.ControlMessageSpace(ctlOpts[ctlHopLimit].length)
+	}
+	if opt.isset(flagPacketInfo) && ctlOpts[ctlPacketInfo].name > 0 {
+		l += socket.ControlMessageSpace(ctlOpts[ctlPacketInfo].length)
+	}
+	if opt.isset(FlagPathMTU) && ctlOpts[ctlPathMTU].name > 0 {
+		l += socket.ControlMessageSpace(ctlOpts[ctlPathMTU].length)
+	}
+	var b []byte
+	if l > 0 {
+		b = make([]byte, l)
+	}
+	return b
+}
+
+// Ancillary data socket options
+const (
+	ctlTrafficClass = iota // header field
+	ctlHopLimit            // header field
+	ctlPacketInfo          // inbound or outbound packet path
+	ctlNextHop             // nexthop
+	ctlPathMTU             // path mtu
+	ctlMax
+)
+
+// A ctlOpt represents a binding for ancillary data socket option.
+type ctlOpt struct {
+	name    int // option name, must be equal or greater than 1
+	length  int // option length
+	marshal func([]byte, *ControlMessage) []byte
+	parse   func(*ControlMessage, []byte)
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_rfc2292_unix.go b/vendor/golang.org/x/net/ipv6/control_rfc2292_unix.go
new file mode 100644
index 0000000..9fd9eb1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_rfc2292_unix.go
@@ -0,0 +1,48 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin
+
+package ipv6
+
+import (
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+func marshal2292HopLimit(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, 4)
+	if cm != nil {
+		socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit))
+	}
+	return m.Next(4)
+}
+
+func marshal2292PacketInfo(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292PKTINFO, sizeofInet6Pktinfo)
+	if cm != nil {
+		pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0]))
+		if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
+			copy(pi.Addr[:], ip)
+		}
+		if cm.IfIndex > 0 {
+			pi.setIfindex(cm.IfIndex)
+		}
+	}
+	return m.Next(sizeofInet6Pktinfo)
+}
+
+func marshal2292NextHop(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292NEXTHOP, sizeofSockaddrInet6)
+	if cm != nil {
+		sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0]))
+		sa.setSockaddr(cm.NextHop, cm.IfIndex)
+	}
+	return m.Next(sizeofSockaddrInet6)
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_rfc3542_unix.go b/vendor/golang.org/x/net/ipv6/control_rfc3542_unix.go
new file mode 100644
index 0000000..eec529c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_rfc3542_unix.go
@@ -0,0 +1,94 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package ipv6
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+func marshalTrafficClass(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_TCLASS, 4)
+	if cm != nil {
+		socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.TrafficClass))
+	}
+	return m.Next(4)
+}
+
+func parseTrafficClass(cm *ControlMessage, b []byte) {
+	cm.TrafficClass = int(socket.NativeEndian.Uint32(b[:4]))
+}
+
+func marshalHopLimit(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_HOPLIMIT, 4)
+	if cm != nil {
+		socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit))
+	}
+	return m.Next(4)
+}
+
+func parseHopLimit(cm *ControlMessage, b []byte) {
+	cm.HopLimit = int(socket.NativeEndian.Uint32(b[:4]))
+}
+
+func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_PKTINFO, sizeofInet6Pktinfo)
+	if cm != nil {
+		pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0]))
+		if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
+			copy(pi.Addr[:], ip)
+		}
+		if cm.IfIndex > 0 {
+			pi.setIfindex(cm.IfIndex)
+		}
+	}
+	return m.Next(sizeofInet6Pktinfo)
+}
+
+func parsePacketInfo(cm *ControlMessage, b []byte) {
+	pi := (*inet6Pktinfo)(unsafe.Pointer(&b[0]))
+	if len(cm.Dst) < net.IPv6len {
+		cm.Dst = make(net.IP, net.IPv6len)
+	}
+	copy(cm.Dst, pi.Addr[:])
+	cm.IfIndex = int(pi.Ifindex)
+}
+
+func marshalNextHop(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_NEXTHOP, sizeofSockaddrInet6)
+	if cm != nil {
+		sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0]))
+		sa.setSockaddr(cm.NextHop, cm.IfIndex)
+	}
+	return m.Next(sizeofSockaddrInet6)
+}
+
+func parseNextHop(cm *ControlMessage, b []byte) {
+}
+
+func marshalPathMTU(b []byte, cm *ControlMessage) []byte {
+	m := socket.ControlMessage(b)
+	m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_PATHMTU, sizeofIPv6Mtuinfo)
+	return m.Next(sizeofIPv6Mtuinfo)
+}
+
+func parsePathMTU(cm *ControlMessage, b []byte) {
+	mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0]))
+	if len(cm.Dst) < net.IPv6len {
+		cm.Dst = make(net.IP, net.IPv6len)
+	}
+	copy(cm.Dst, mi.Addr.Addr[:])
+	cm.IfIndex = int(mi.Addr.Scope_id)
+	cm.MTU = int(mi.Mtu)
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_stub.go b/vendor/golang.org/x/net/ipv6/control_stub.go
new file mode 100644
index 0000000..a045f28
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_stub.go
@@ -0,0 +1,13 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv6
+
+import "golang.org/x/net/internal/socket"
+
+func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_unix.go b/vendor/golang.org/x/net/ipv6/control_unix.go
new file mode 100644
index 0000000..6651506
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_unix.go
@@ -0,0 +1,55 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package ipv6
+
+import "golang.org/x/net/internal/socket"
+
+func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
+	opt.Lock()
+	defer opt.Unlock()
+	if so, ok := sockOpts[ssoReceiveTrafficClass]; ok && cf&FlagTrafficClass != 0 {
+		if err := so.SetInt(c, boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagTrafficClass)
+		} else {
+			opt.clear(FlagTrafficClass)
+		}
+	}
+	if so, ok := sockOpts[ssoReceiveHopLimit]; ok && cf&FlagHopLimit != 0 {
+		if err := so.SetInt(c, boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagHopLimit)
+		} else {
+			opt.clear(FlagHopLimit)
+		}
+	}
+	if so, ok := sockOpts[ssoReceivePacketInfo]; ok && cf&flagPacketInfo != 0 {
+		if err := so.SetInt(c, boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(cf & flagPacketInfo)
+		} else {
+			opt.clear(cf & flagPacketInfo)
+		}
+	}
+	if so, ok := sockOpts[ssoReceivePathMTU]; ok && cf&FlagPathMTU != 0 {
+		if err := so.SetInt(c, boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagPathMTU)
+		} else {
+			opt.clear(FlagPathMTU)
+		}
+	}
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_windows.go b/vendor/golang.org/x/net/ipv6/control_windows.go
new file mode 100644
index 0000000..ef2563b
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_windows.go
@@ -0,0 +1,16 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"syscall"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
+	// TODO(mikio): implement this
+	return syscall.EWINDOWS
+}
diff --git a/vendor/golang.org/x/net/ipv6/defs_darwin.go b/vendor/golang.org/x/net/ipv6/defs_darwin.go
new file mode 100644
index 0000000..55ddc11
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_darwin.go
@@ -0,0 +1,112 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#define __APPLE_USE_RFC_3542
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+
+	sysIPV6_PORTRANGE    = C.IPV6_PORTRANGE
+	sysICMP6_FILTER      = C.ICMP6_FILTER
+	sysIPV6_2292PKTINFO  = C.IPV6_2292PKTINFO
+	sysIPV6_2292HOPLIMIT = C.IPV6_2292HOPLIMIT
+	sysIPV6_2292NEXTHOP  = C.IPV6_2292NEXTHOP
+	sysIPV6_2292HOPOPTS  = C.IPV6_2292HOPOPTS
+	sysIPV6_2292DSTOPTS  = C.IPV6_2292DSTOPTS
+	sysIPV6_2292RTHDR    = C.IPV6_2292RTHDR
+
+	sysIPV6_2292PKTOPTIONS = C.IPV6_2292PKTOPTIONS
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+	sysIPV6_TCLASS     = C.IPV6_TCLASS
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO = C.IPV6_RECVPKTINFO
+
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PREFER_TEMPADDR = C.IPV6_PREFER_TEMPADDR
+
+	sysIPV6_MSFILTER            = C.IPV6_MSFILTER
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+
+	sysIPV6_BOUND_IF = C.IPV6_BOUND_IF
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo    = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo     = C.sizeof_struct_ip6_mtuinfo
+
+	sizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sockaddrStorage C.struct_sockaddr_storage
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type icmpv6Filter C.struct_icmp6_filter
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
diff --git a/vendor/golang.org/x/net/ipv6/defs_dragonfly.go b/vendor/golang.org/x/net/ipv6/defs_dragonfly.go
new file mode 100644
index 0000000..a4c383a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_dragonfly.go
@@ -0,0 +1,84 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PREFER_TEMPADDR = C.IPV6_PREFER_TEMPADDR
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type icmpv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_freebsd.go b/vendor/golang.org/x/net/ipv6/defs_freebsd.go
new file mode 100644
index 0000000..53e6253
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_freebsd.go
@@ -0,0 +1,105 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PREFER_TEMPADDR = C.IPV6_PREFER_TEMPADDR
+
+	sysIPV6_BINDANY = C.IPV6_BINDANY
+
+	sysIPV6_MSFILTER = C.IPV6_MSFILTER
+
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo    = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo     = C.sizeof_struct_ip6_mtuinfo
+
+	sizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sockaddrStorage C.struct_sockaddr_storage
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
+
+type icmpv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_linux.go b/vendor/golang.org/x/net/ipv6/defs_linux.go
new file mode 100644
index 0000000..3308cb2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_linux.go
@@ -0,0 +1,147 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/ipv6.h>
+#include <linux/icmpv6.h>
+#include <linux/filter.h>
+#include <sys/socket.h>
+*/
+import "C"
+
+const (
+	sysIPV6_ADDRFORM       = C.IPV6_ADDRFORM
+	sysIPV6_2292PKTINFO    = C.IPV6_2292PKTINFO
+	sysIPV6_2292HOPOPTS    = C.IPV6_2292HOPOPTS
+	sysIPV6_2292DSTOPTS    = C.IPV6_2292DSTOPTS
+	sysIPV6_2292RTHDR      = C.IPV6_2292RTHDR
+	sysIPV6_2292PKTOPTIONS = C.IPV6_2292PKTOPTIONS
+	sysIPV6_CHECKSUM       = C.IPV6_CHECKSUM
+	sysIPV6_2292HOPLIMIT   = C.IPV6_2292HOPLIMIT
+	sysIPV6_NEXTHOP        = C.IPV6_NEXTHOP
+	sysIPV6_FLOWINFO       = C.IPV6_FLOWINFO
+
+	sysIPV6_UNICAST_HOPS        = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF        = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS      = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP      = C.IPV6_MULTICAST_LOOP
+	sysIPV6_ADD_MEMBERSHIP      = C.IPV6_ADD_MEMBERSHIP
+	sysIPV6_DROP_MEMBERSHIP     = C.IPV6_DROP_MEMBERSHIP
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+	sysMCAST_MSFILTER           = C.MCAST_MSFILTER
+	sysIPV6_ROUTER_ALERT        = C.IPV6_ROUTER_ALERT
+	sysIPV6_MTU_DISCOVER        = C.IPV6_MTU_DISCOVER
+	sysIPV6_MTU                 = C.IPV6_MTU
+	sysIPV6_RECVERR             = C.IPV6_RECVERR
+	sysIPV6_V6ONLY              = C.IPV6_V6ONLY
+	sysIPV6_JOIN_ANYCAST        = C.IPV6_JOIN_ANYCAST
+	sysIPV6_LEAVE_ANYCAST       = C.IPV6_LEAVE_ANYCAST
+
+	//sysIPV6_PMTUDISC_DONT      = C.IPV6_PMTUDISC_DONT
+	//sysIPV6_PMTUDISC_WANT      = C.IPV6_PMTUDISC_WANT
+	//sysIPV6_PMTUDISC_DO        = C.IPV6_PMTUDISC_DO
+	//sysIPV6_PMTUDISC_PROBE     = C.IPV6_PMTUDISC_PROBE
+	//sysIPV6_PMTUDISC_INTERFACE = C.IPV6_PMTUDISC_INTERFACE
+	//sysIPV6_PMTUDISC_OMIT      = C.IPV6_PMTUDISC_OMIT
+
+	sysIPV6_FLOWLABEL_MGR = C.IPV6_FLOWLABEL_MGR
+	sysIPV6_FLOWINFO_SEND = C.IPV6_FLOWINFO_SEND
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+	sysIPV6_XFRM_POLICY  = C.IPV6_XFRM_POLICY
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_PKTINFO      = C.IPV6_PKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_HOPLIMIT     = C.IPV6_HOPLIMIT
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_HOPOPTS      = C.IPV6_HOPOPTS
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RTHDR        = C.IPV6_RTHDR
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+	sysIPV6_DSTOPTS      = C.IPV6_DSTOPTS
+	sysIPV6_RECVPATHMTU  = C.IPV6_RECVPATHMTU
+	sysIPV6_PATHMTU      = C.IPV6_PATHMTU
+	sysIPV6_DONTFRAG     = C.IPV6_DONTFRAG
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+	sysIPV6_TCLASS     = C.IPV6_TCLASS
+
+	sysIPV6_ADDR_PREFERENCES = C.IPV6_ADDR_PREFERENCES
+
+	sysIPV6_PREFER_SRC_TMP            = C.IPV6_PREFER_SRC_TMP
+	sysIPV6_PREFER_SRC_PUBLIC         = C.IPV6_PREFER_SRC_PUBLIC
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = C.IPV6_PREFER_SRC_PUBTMP_DEFAULT
+	sysIPV6_PREFER_SRC_COA            = C.IPV6_PREFER_SRC_COA
+	sysIPV6_PREFER_SRC_HOME           = C.IPV6_PREFER_SRC_HOME
+	sysIPV6_PREFER_SRC_CGA            = C.IPV6_PREFER_SRC_CGA
+	sysIPV6_PREFER_SRC_NONCGA         = C.IPV6_PREFER_SRC_NONCGA
+
+	sysIPV6_MINHOPCOUNT = C.IPV6_MINHOPCOUNT
+
+	sysIPV6_ORIGDSTADDR     = C.IPV6_ORIGDSTADDR
+	sysIPV6_RECVORIGDSTADDR = C.IPV6_RECVORIGDSTADDR
+	sysIPV6_TRANSPARENT     = C.IPV6_TRANSPARENT
+	sysIPV6_UNICAST_IF      = C.IPV6_UNICAST_IF
+
+	sysICMPV6_FILTER = C.ICMPV6_FILTER
+
+	sysICMPV6_FILTER_BLOCK       = C.ICMPV6_FILTER_BLOCK
+	sysICMPV6_FILTER_PASS        = C.ICMPV6_FILTER_PASS
+	sysICMPV6_FILTER_BLOCKOTHERS = C.ICMPV6_FILTER_BLOCKOTHERS
+	sysICMPV6_FILTER_PASSONLY    = C.ICMPV6_FILTER_PASSONLY
+
+	sysSOL_SOCKET       = C.SOL_SOCKET
+	sysSO_ATTACH_FILTER = C.SO_ATTACH_FILTER
+
+	sizeofKernelSockaddrStorage = C.sizeof_struct___kernel_sockaddr_storage
+	sizeofSockaddrInet6         = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo          = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo           = C.sizeof_struct_ip6_mtuinfo
+	sizeofIPv6FlowlabelReq      = C.sizeof_struct_in6_flowlabel_req
+
+	sizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+
+	sizeofSockFprog = C.sizeof_struct_sock_fprog
+)
+
+type kernelSockaddrStorage C.struct___kernel_sockaddr_storage
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6FlowlabelReq C.struct_in6_flowlabel_req
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
+
+type icmpv6Filter C.struct_icmp6_filter
+
+type sockFProg C.struct_sock_fprog
+
+type sockFilter C.struct_sock_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_netbsd.go b/vendor/golang.org/x/net/ipv6/defs_netbsd.go
new file mode 100644
index 0000000..be9ceb9
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_netbsd.go
@@ -0,0 +1,80 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+	sysIPV6_PATHMTU     = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type icmpv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_openbsd.go b/vendor/golang.org/x/net/ipv6/defs_openbsd.go
new file mode 100644
index 0000000..177ddf8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_openbsd.go
@@ -0,0 +1,89 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_AUTH_LEVEL        = C.IPV6_AUTH_LEVEL
+	sysIPV6_ESP_TRANS_LEVEL   = C.IPV6_ESP_TRANS_LEVEL
+	sysIPV6_ESP_NETWORK_LEVEL = C.IPV6_ESP_NETWORK_LEVEL
+	sysIPSEC6_OUTSA           = C.IPSEC6_OUTSA
+	sysIPV6_RECVTCLASS        = C.IPV6_RECVTCLASS
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+	sysIPV6_IPCOMP_LEVEL  = C.IPV6_IPCOMP_LEVEL
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+	sysIPV6_PIPEX    = C.IPV6_PIPEX
+
+	sysIPV6_RTABLE = C.IPV6_RTABLE
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type icmpv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_solaris.go b/vendor/golang.org/x/net/ipv6/defs_solaris.go
new file mode 100644
index 0000000..0f8ce2b
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_solaris.go
@@ -0,0 +1,114 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+
+	sysIPV6_PKTINFO = C.IPV6_PKTINFO
+
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+
+	sysIPV6_RTHDR        = C.IPV6_RTHDR
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+
+	sysIPV6_RECVRTHDR = C.IPV6_RECVRTHDR
+
+	sysIPV6_RECVRTHDRDSTOPTS = C.IPV6_RECVRTHDRDSTOPTS
+
+	sysIPV6_CHECKSUM        = C.IPV6_CHECKSUM
+	sysIPV6_RECVTCLASS      = C.IPV6_RECVTCLASS
+	sysIPV6_USE_MIN_MTU     = C.IPV6_USE_MIN_MTU
+	sysIPV6_DONTFRAG        = C.IPV6_DONTFRAG
+	sysIPV6_SEC_OPT         = C.IPV6_SEC_OPT
+	sysIPV6_SRC_PREFERENCES = C.IPV6_SRC_PREFERENCES
+	sysIPV6_RECVPATHMTU     = C.IPV6_RECVPATHMTU
+	sysIPV6_PATHMTU         = C.IPV6_PATHMTU
+	sysIPV6_TCLASS          = C.IPV6_TCLASS
+	sysIPV6_V6ONLY          = C.IPV6_V6ONLY
+
+	sysIPV6_RECVDSTOPTS = C.IPV6_RECVDSTOPTS
+
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+
+	sysIPV6_PREFER_SRC_HOME   = C.IPV6_PREFER_SRC_HOME
+	sysIPV6_PREFER_SRC_COA    = C.IPV6_PREFER_SRC_COA
+	sysIPV6_PREFER_SRC_PUBLIC = C.IPV6_PREFER_SRC_PUBLIC
+	sysIPV6_PREFER_SRC_TMP    = C.IPV6_PREFER_SRC_TMP
+	sysIPV6_PREFER_SRC_NONCGA = C.IPV6_PREFER_SRC_NONCGA
+	sysIPV6_PREFER_SRC_CGA    = C.IPV6_PREFER_SRC_CGA
+
+	sysIPV6_PREFER_SRC_MIPMASK    = C.IPV6_PREFER_SRC_MIPMASK
+	sysIPV6_PREFER_SRC_MIPDEFAULT = C.IPV6_PREFER_SRC_MIPDEFAULT
+	sysIPV6_PREFER_SRC_TMPMASK    = C.IPV6_PREFER_SRC_TMPMASK
+	sysIPV6_PREFER_SRC_TMPDEFAULT = C.IPV6_PREFER_SRC_TMPDEFAULT
+	sysIPV6_PREFER_SRC_CGAMASK    = C.IPV6_PREFER_SRC_CGAMASK
+	sysIPV6_PREFER_SRC_CGADEFAULT = C.IPV6_PREFER_SRC_CGADEFAULT
+
+	sysIPV6_PREFER_SRC_MASK = C.IPV6_PREFER_SRC_MASK
+
+	sysIPV6_PREFER_SRC_DEFAULT = C.IPV6_PREFER_SRC_DEFAULT
+
+	sysIPV6_BOUND_IF   = C.IPV6_BOUND_IF
+	sysIPV6_UNSPEC_SRC = C.IPV6_UNSPEC_SRC
+
+	sysICMP6_FILTER = C.ICMP6_FILTER
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+	sizeofInet6Pktinfo    = C.sizeof_struct_in6_pktinfo
+	sizeofIPv6Mtuinfo     = C.sizeof_struct_ip6_mtuinfo
+
+	sizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sizeofGroupReq       = C.sizeof_struct_group_req
+	sizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sockaddrStorage C.struct_sockaddr_storage
+
+type sockaddrInet6 C.struct_sockaddr_in6
+
+type inet6Pktinfo C.struct_in6_pktinfo
+
+type ipv6Mtuinfo C.struct_ip6_mtuinfo
+
+type ipv6Mreq C.struct_ipv6_mreq
+
+type groupReq C.struct_group_req
+
+type groupSourceReq C.struct_group_source_req
+
+type icmpv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/dgramopt.go b/vendor/golang.org/x/net/ipv6/dgramopt.go
new file mode 100644
index 0000000..703dafe
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/dgramopt.go
@@ -0,0 +1,302 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/bpf"
+)
+
+// MulticastHopLimit returns the hop limit field value for outgoing
+// multicast packets.
+func (c *dgramOpt) MulticastHopLimit() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastHopLimit]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	return so.GetInt(c.Conn)
+}
+
+// SetMulticastHopLimit sets the hop limit field value for future
+// outgoing multicast packets.
+func (c *dgramOpt) SetMulticastHopLimit(hoplim int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastHopLimit]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, hoplim)
+}
+
+// MulticastInterface returns the default interface for multicast
+// packet transmissions.
+func (c *dgramOpt) MulticastInterface() (*net.Interface, error) {
+	if !c.ok() {
+		return nil, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastInterface]
+	if !ok {
+		return nil, errOpNoSupport
+	}
+	return so.getMulticastInterface(c.Conn)
+}
+
+// SetMulticastInterface sets the default interface for future
+// multicast packet transmissions.
+func (c *dgramOpt) SetMulticastInterface(ifi *net.Interface) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastInterface]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.setMulticastInterface(c.Conn, ifi)
+}
+
+// MulticastLoopback reports whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) MulticastLoopback() (bool, error) {
+	if !c.ok() {
+		return false, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastLoopback]
+	if !ok {
+		return false, errOpNoSupport
+	}
+	on, err := so.GetInt(c.Conn)
+	if err != nil {
+		return false, err
+	}
+	return on == 1, nil
+}
+
+// SetMulticastLoopback sets whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) SetMulticastLoopback(on bool) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoMulticastLoopback]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, boolint(on))
+}
+
+// JoinGroup joins the group address group on the interface ifi.
+// By default all sources that can cast data to group are accepted.
+// It's possible to mute and unmute data transmission from a specific
+// source by using ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup.
+// JoinGroup uses the system assigned multicast interface when ifi is
+// nil, although this is not recommended because the assignment
+// depends on platforms and sometimes it might require routing
+// configuration.
+func (c *dgramOpt) JoinGroup(ifi *net.Interface, group net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoJoinGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	return so.setGroup(c.Conn, ifi, grp)
+}
+
+// LeaveGroup leaves the group address group on the interface ifi
+// regardless of whether the group is any-source group or
+// source-specific group.
+func (c *dgramOpt) LeaveGroup(ifi *net.Interface, group net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoLeaveGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	return so.setGroup(c.Conn, ifi, grp)
+}
+
+// JoinSourceSpecificGroup joins the source-specific group comprising
+// group and source on the interface ifi.
+// JoinSourceSpecificGroup uses the system assigned multicast
+// interface when ifi is nil, although this is not recommended because
+// the assignment depends on platforms and sometimes it might require
+// routing configuration.
+func (c *dgramOpt) JoinSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoJoinSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// LeaveSourceSpecificGroup leaves the source-specific group on the
+// interface ifi.
+func (c *dgramOpt) LeaveSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoLeaveSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// ExcludeSourceSpecificGroup excludes the source-specific group from
+// the already joined any-source groups by JoinGroup on the interface
+// ifi.
+func (c *dgramOpt) ExcludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoBlockSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// IncludeSourceSpecificGroup includes the excluded source-specific
+// group by ExcludeSourceSpecificGroup again on the interface ifi.
+func (c *dgramOpt) IncludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoUnblockSourceGroup]
+	if !ok {
+		return errOpNoSupport
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return so.setSourceGroup(c.Conn, ifi, grp, src)
+}
+
+// Checksum reports whether the kernel will compute, store or verify a
+// checksum for both incoming and outgoing packets. If on is true, it
+// returns an offset in bytes into the data of where the checksum
+// field is located.
+func (c *dgramOpt) Checksum() (on bool, offset int, err error) {
+	if !c.ok() {
+		return false, 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoChecksum]
+	if !ok {
+		return false, 0, errOpNoSupport
+	}
+	offset, err = so.GetInt(c.Conn)
+	if err != nil {
+		return false, 0, err
+	}
+	if offset < 0 {
+		return false, 0, nil
+	}
+	return true, offset, nil
+}
+
+// SetChecksum enables the kernel checksum processing. If on is ture,
+// the offset should be an offset in bytes into the data of where the
+// checksum field is located.
+func (c *dgramOpt) SetChecksum(on bool, offset int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoChecksum]
+	if !ok {
+		return errOpNoSupport
+	}
+	if !on {
+		offset = -1
+	}
+	return so.SetInt(c.Conn, offset)
+}
+
+// ICMPFilter returns an ICMP filter.
+func (c *dgramOpt) ICMPFilter() (*ICMPFilter, error) {
+	if !c.ok() {
+		return nil, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoICMPFilter]
+	if !ok {
+		return nil, errOpNoSupport
+	}
+	return so.getICMPFilter(c.Conn)
+}
+
+// SetICMPFilter deploys the ICMP filter.
+func (c *dgramOpt) SetICMPFilter(f *ICMPFilter) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoICMPFilter]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.setICMPFilter(c.Conn, f)
+}
+
+// SetBPF attaches a BPF program to the connection.
+//
+// Only supported on Linux.
+func (c *dgramOpt) SetBPF(filter []bpf.RawInstruction) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoAttachFilter]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.setBPF(c.Conn, filter)
+}
diff --git a/vendor/golang.org/x/net/ipv6/doc.go b/vendor/golang.org/x/net/ipv6/doc.go
new file mode 100644
index 0000000..664a97d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/doc.go
@@ -0,0 +1,243 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package ipv6 implements IP-level socket options for the Internet
+// Protocol version 6.
+//
+// The package provides IP-level socket options that allow
+// manipulation of IPv6 facilities.
+//
+// The IPv6 protocol is defined in RFC 8200.
+// Socket interface extensions are defined in RFC 3493, RFC 3542 and
+// RFC 3678.
+// MLDv1 and MLDv2 are defined in RFC 2710 and RFC 3810.
+// Source-specific multicast is defined in RFC 4607.
+//
+// On Darwin, this package requires OS X Mavericks version 10.9 or
+// above, or equivalent.
+//
+//
+// Unicasting
+//
+// The options for unicasting are available for net.TCPConn,
+// net.UDPConn and net.IPConn which are created as network connections
+// that use the IPv6 transport. When a single TCP connection carrying
+// a data flow of multiple packets needs to indicate the flow is
+// important, Conn is used to set the traffic class field on the IPv6
+// header for each packet.
+//
+//	ln, err := net.Listen("tcp6", "[::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer ln.Close()
+//	for {
+//		c, err := ln.Accept()
+//		if err != nil {
+//			// error handling
+//		}
+//		go func(c net.Conn) {
+//			defer c.Close()
+//
+// The outgoing packets will be labeled DiffServ assured forwarding
+// class 1 low drop precedence, known as AF11 packets.
+//
+//			if err := ipv6.NewConn(c).SetTrafficClass(0x28); err != nil {
+//				// error handling
+//			}
+//			if _, err := c.Write(data); err != nil {
+//				// error handling
+//			}
+//		}(c)
+//	}
+//
+//
+// Multicasting
+//
+// The options for multicasting are available for net.UDPConn and
+// net.IPconn which are created as network connections that use the
+// IPv6 transport. A few network facilities must be prepared before
+// you begin multicasting, at a minimum joining network interfaces and
+// multicast groups.
+//
+//	en0, err := net.InterfaceByName("en0")
+//	if err != nil {
+//		// error handling
+//	}
+//	en1, err := net.InterfaceByIndex(911)
+//	if err != nil {
+//		// error handling
+//	}
+//	group := net.ParseIP("ff02::114")
+//
+// First, an application listens to an appropriate address with an
+// appropriate service port.
+//
+//	c, err := net.ListenPacket("udp6", "[::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c.Close()
+//
+// Second, the application joins multicast groups, starts listening to
+// the groups on the specified network interfaces. Note that the
+// service port for transport layer protocol does not matter with this
+// operation as joining groups affects only network and link layer
+// protocols, such as IPv6 and Ethernet.
+//
+//	p := ipv6.NewPacketConn(c)
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: group}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en1, &net.UDPAddr{IP: group}); err != nil {
+//		// error handling
+//	}
+//
+// The application might set per packet control message transmissions
+// between the protocol stack within the kernel. When the application
+// needs a destination address on an incoming packet,
+// SetControlMessage of PacketConn is used to enable control message
+// transmissions.
+//
+//	if err := p.SetControlMessage(ipv6.FlagDst, true); err != nil {
+//		// error handling
+//	}
+//
+// The application could identify whether the received packets are
+// of interest by using the control message that contains the
+// destination address of the received packet.
+//
+//	b := make([]byte, 1500)
+//	for {
+//		n, rcm, src, err := p.ReadFrom(b)
+//		if err != nil {
+//			// error handling
+//		}
+//		if rcm.Dst.IsMulticast() {
+//			if rcm.Dst.Equal(group) {
+//				// joined group, do something
+//			} else {
+//				// unknown group, discard
+//				continue
+//			}
+//		}
+//
+// The application can also send both unicast and multicast packets.
+//
+//		p.SetTrafficClass(0x0)
+//		p.SetHopLimit(16)
+//		if _, err := p.WriteTo(data[:n], nil, src); err != nil {
+//			// error handling
+//		}
+//		dst := &net.UDPAddr{IP: group, Port: 1024}
+//		wcm := ipv6.ControlMessage{TrafficClass: 0xe0, HopLimit: 1}
+//		for _, ifi := range []*net.Interface{en0, en1} {
+//			wcm.IfIndex = ifi.Index
+//			if _, err := p.WriteTo(data[:n], &wcm, dst); err != nil {
+//				// error handling
+//			}
+//		}
+//	}
+//
+//
+// More multicasting
+//
+// An application that uses PacketConn may join multiple multicast
+// groups. For example, a UDP listener with port 1024 might join two
+// different groups across over two different network interfaces by
+// using:
+//
+//	c, err := net.ListenPacket("udp6", "[::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c.Close()
+//	p := ipv6.NewPacketConn(c)
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::1:114")}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::2:114")}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en1, &net.UDPAddr{IP: net.ParseIP("ff02::2:114")}); err != nil {
+//		// error handling
+//	}
+//
+// It is possible for multiple UDP listeners that listen on the same
+// UDP port to join the same multicast group. The net package will
+// provide a socket that listens to a wildcard address with reusable
+// UDP port when an appropriate multicast address prefix is passed to
+// the net.ListenPacket or net.ListenUDP.
+//
+//	c1, err := net.ListenPacket("udp6", "[ff02::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c1.Close()
+//	c2, err := net.ListenPacket("udp6", "[ff02::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c2.Close()
+//	p1 := ipv6.NewPacketConn(c1)
+//	if err := p1.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::114")}); err != nil {
+//		// error handling
+//	}
+//	p2 := ipv6.NewPacketConn(c2)
+//	if err := p2.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::114")}); err != nil {
+//		// error handling
+//	}
+//
+// Also it is possible for the application to leave or rejoin a
+// multicast group on the network interface.
+//
+//	if err := p.LeaveGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::114")}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff01::114")}); err != nil {
+//		// error handling
+//	}
+//
+//
+// Source-specific multicasting
+//
+// An application that uses PacketConn on MLDv2 supported platform is
+// able to join source-specific multicast groups.
+// The application may use JoinSourceSpecificGroup and
+// LeaveSourceSpecificGroup for the operation known as "include" mode,
+//
+//	ssmgroup := net.UDPAddr{IP: net.ParseIP("ff32::8000:9")}
+//	ssmsource := net.UDPAddr{IP: net.ParseIP("fe80::cafe")}
+//	if err := p.JoinSourceSpecificGroup(en0, &ssmgroup, &ssmsource); err != nil {
+//		// error handling
+//	}
+//	if err := p.LeaveSourceSpecificGroup(en0, &ssmgroup, &ssmsource); err != nil {
+//		// error handling
+//	}
+//
+// or JoinGroup, ExcludeSourceSpecificGroup,
+// IncludeSourceSpecificGroup and LeaveGroup for the operation known
+// as "exclude" mode.
+//
+//	exclsource := net.UDPAddr{IP: net.ParseIP("fe80::dead")}
+//	if err := p.JoinGroup(en0, &ssmgroup); err != nil {
+//		// error handling
+//	}
+//	if err := p.ExcludeSourceSpecificGroup(en0, &ssmgroup, &exclsource); err != nil {
+//		// error handling
+//	}
+//	if err := p.LeaveGroup(en0, &ssmgroup); err != nil {
+//		// error handling
+//	}
+//
+// Note that it depends on each platform implementation what happens
+// when an application which runs on MLDv2 unsupported platform uses
+// JoinSourceSpecificGroup and LeaveSourceSpecificGroup.
+// In general the platform tries to fall back to conversations using
+// MLDv1 and starts to listen to multicast traffic.
+// In the fallback case, ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup may return an error.
+package ipv6 // import "golang.org/x/net/ipv6"
+
+// BUG(mikio): This package is not implemented on NaCl and Plan 9.
diff --git a/vendor/golang.org/x/net/ipv6/endpoint.go b/vendor/golang.org/x/net/ipv6/endpoint.go
new file mode 100644
index 0000000..0624c17
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/endpoint.go
@@ -0,0 +1,128 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+	"time"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the JoinSourceSpecificGroup,
+// LeaveSourceSpecificGroup, ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup methods of PacketConn are not
+// implemented.
+
+// A Conn represents a network endpoint that uses IPv6 transport.
+// It allows to set basic IP-level socket options such as traffic
+// class and hop limit.
+type Conn struct {
+	genericOpt
+}
+
+type genericOpt struct {
+	*socket.Conn
+}
+
+func (c *genericOpt) ok() bool { return c != nil && c.Conn != nil }
+
+// PathMTU returns a path MTU value for the destination associated
+// with the endpoint.
+func (c *Conn) PathMTU() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoPathMTU]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	_, mtu, err := so.getMTUInfo(c.Conn)
+	if err != nil {
+		return 0, err
+	}
+	return mtu, nil
+}
+
+// NewConn returns a new Conn.
+func NewConn(c net.Conn) *Conn {
+	cc, _ := socket.NewConn(c)
+	return &Conn{
+		genericOpt: genericOpt{Conn: cc},
+	}
+}
+
+// A PacketConn represents a packet network endpoint that uses IPv6
+// transport. It is used to control several IP-level socket options
+// including IPv6 header manipulation. It also provides datagram
+// based network I/O methods specific to the IPv6 and higher layer
+// protocols such as OSPF, GRE, and UDP.
+type PacketConn struct {
+	genericOpt
+	dgramOpt
+	payloadHandler
+}
+
+type dgramOpt struct {
+	*socket.Conn
+}
+
+func (c *dgramOpt) ok() bool { return c != nil && c.Conn != nil }
+
+// SetControlMessage allows to receive the per packet basis IP-level
+// socket options.
+func (c *PacketConn) SetControlMessage(cf ControlFlags, on bool) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return setControlMessage(c.dgramOpt.Conn, &c.payloadHandler.rawOpt, cf, on)
+}
+
+// SetDeadline sets the read and write deadlines associated with the
+// endpoint.
+func (c *PacketConn) SetDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.SetDeadline(t)
+}
+
+// SetReadDeadline sets the read deadline associated with the
+// endpoint.
+func (c *PacketConn) SetReadDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.SetReadDeadline(t)
+}
+
+// SetWriteDeadline sets the write deadline associated with the
+// endpoint.
+func (c *PacketConn) SetWriteDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.SetWriteDeadline(t)
+}
+
+// Close closes the endpoint.
+func (c *PacketConn) Close() error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.Close()
+}
+
+// NewPacketConn returns a new PacketConn using c as its underlying
+// transport.
+func NewPacketConn(c net.PacketConn) *PacketConn {
+	cc, _ := socket.NewConn(c.(net.Conn))
+	return &PacketConn{
+		genericOpt:     genericOpt{Conn: cc},
+		dgramOpt:       dgramOpt{Conn: cc},
+		payloadHandler: payloadHandler{PacketConn: c, Conn: cc},
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/gen.go b/vendor/golang.org/x/net/ipv6/gen.go
new file mode 100644
index 0000000..47b7e9f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/gen.go
@@ -0,0 +1,199 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+//go:generate go run gen.go
+
+// This program generates system adaptation constants and types,
+// internet protocol constants and tables by reading template files
+// and IANA protocol registries.
+package main
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"go/format"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	if err := genzsys(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	if err := geniana(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func genzsys() error {
+	defs := "defs_" + runtime.GOOS + ".go"
+	f, err := os.Open(defs)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	f.Close()
+	cmd := exec.Command("go", "tool", "cgo", "-godefs", defs)
+	b, err := cmd.Output()
+	if err != nil {
+		return err
+	}
+	b, err = format.Source(b)
+	if err != nil {
+		return err
+	}
+	zsys := "zsys_" + runtime.GOOS + ".go"
+	switch runtime.GOOS {
+	case "freebsd", "linux":
+		zsys = "zsys_" + runtime.GOOS + "_" + runtime.GOARCH + ".go"
+	}
+	if err := ioutil.WriteFile(zsys, b, 0644); err != nil {
+		return err
+	}
+	return nil
+}
+
+var registries = []struct {
+	url   string
+	parse func(io.Writer, io.Reader) error
+}{
+	{
+		"https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xml",
+		parseICMPv6Parameters,
+	},
+}
+
+func geniana() error {
+	var bb bytes.Buffer
+	fmt.Fprintf(&bb, "// go generate gen.go\n")
+	fmt.Fprintf(&bb, "// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n")
+	fmt.Fprintf(&bb, "package ipv6\n\n")
+	for _, r := range registries {
+		resp, err := http.Get(r.url)
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			return fmt.Errorf("got HTTP status code %v for %v\n", resp.StatusCode, r.url)
+		}
+		if err := r.parse(&bb, resp.Body); err != nil {
+			return err
+		}
+		fmt.Fprintf(&bb, "\n")
+	}
+	b, err := format.Source(bb.Bytes())
+	if err != nil {
+		return err
+	}
+	if err := ioutil.WriteFile("iana.go", b, 0644); err != nil {
+		return err
+	}
+	return nil
+}
+
+func parseICMPv6Parameters(w io.Writer, r io.Reader) error {
+	dec := xml.NewDecoder(r)
+	var icp icmpv6Parameters
+	if err := dec.Decode(&icp); err != nil {
+		return err
+	}
+	prs := icp.escape()
+	fmt.Fprintf(w, "// %s, Updated: %s\n", icp.Title, icp.Updated)
+	fmt.Fprintf(w, "const (\n")
+	for _, pr := range prs {
+		if pr.Name == "" {
+			continue
+		}
+		fmt.Fprintf(w, "ICMPType%s ICMPType = %d", pr.Name, pr.Value)
+		fmt.Fprintf(w, "// %s\n", pr.OrigName)
+	}
+	fmt.Fprintf(w, ")\n\n")
+	fmt.Fprintf(w, "// %s, Updated: %s\n", icp.Title, icp.Updated)
+	fmt.Fprintf(w, "var icmpTypes = map[ICMPType]string{\n")
+	for _, pr := range prs {
+		if pr.Name == "" {
+			continue
+		}
+		fmt.Fprintf(w, "%d: %q,\n", pr.Value, strings.ToLower(pr.OrigName))
+	}
+	fmt.Fprintf(w, "}\n")
+	return nil
+}
+
+type icmpv6Parameters struct {
+	XMLName    xml.Name `xml:"registry"`
+	Title      string   `xml:"title"`
+	Updated    string   `xml:"updated"`
+	Registries []struct {
+		Title   string `xml:"title"`
+		Records []struct {
+			Value string `xml:"value"`
+			Name  string `xml:"name"`
+		} `xml:"record"`
+	} `xml:"registry"`
+}
+
+type canonICMPv6ParamRecord struct {
+	OrigName string
+	Name     string
+	Value    int
+}
+
+func (icp *icmpv6Parameters) escape() []canonICMPv6ParamRecord {
+	id := -1
+	for i, r := range icp.Registries {
+		if strings.Contains(r.Title, "Type") || strings.Contains(r.Title, "type") {
+			id = i
+			break
+		}
+	}
+	if id < 0 {
+		return nil
+	}
+	prs := make([]canonICMPv6ParamRecord, len(icp.Registries[id].Records))
+	sr := strings.NewReplacer(
+		"Messages", "",
+		"Message", "",
+		"ICMP", "",
+		"+", "P",
+		"-", "",
+		"/", "",
+		".", "",
+		" ", "",
+	)
+	for i, pr := range icp.Registries[id].Records {
+		if strings.Contains(pr.Name, "Reserved") ||
+			strings.Contains(pr.Name, "Unassigned") ||
+			strings.Contains(pr.Name, "Deprecated") ||
+			strings.Contains(pr.Name, "Experiment") ||
+			strings.Contains(pr.Name, "experiment") {
+			continue
+		}
+		ss := strings.Split(pr.Name, "\n")
+		if len(ss) > 1 {
+			prs[i].Name = strings.Join(ss, " ")
+		} else {
+			prs[i].Name = ss[0]
+		}
+		s := strings.TrimSpace(prs[i].Name)
+		prs[i].OrigName = s
+		prs[i].Name = sr.Replace(s)
+		prs[i].Value, _ = strconv.Atoi(pr.Value)
+	}
+	return prs
+}
diff --git a/vendor/golang.org/x/net/ipv6/genericopt.go b/vendor/golang.org/x/net/ipv6/genericopt.go
new file mode 100644
index 0000000..e9dbc2e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/genericopt.go
@@ -0,0 +1,58 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import "syscall"
+
+// TrafficClass returns the traffic class field value for outgoing
+// packets.
+func (c *genericOpt) TrafficClass() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoTrafficClass]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	return so.GetInt(c.Conn)
+}
+
+// SetTrafficClass sets the traffic class field value for future
+// outgoing packets.
+func (c *genericOpt) SetTrafficClass(tclass int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoTrafficClass]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, tclass)
+}
+
+// HopLimit returns the hop limit field value for outgoing packets.
+func (c *genericOpt) HopLimit() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoHopLimit]
+	if !ok {
+		return 0, errOpNoSupport
+	}
+	return so.GetInt(c.Conn)
+}
+
+// SetHopLimit sets the hop limit field value for future outgoing
+// packets.
+func (c *genericOpt) SetHopLimit(hoplim int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	so, ok := sockOpts[ssoHopLimit]
+	if !ok {
+		return errOpNoSupport
+	}
+	return so.SetInt(c.Conn, hoplim)
+}
diff --git a/vendor/golang.org/x/net/ipv6/header.go b/vendor/golang.org/x/net/ipv6/header.go
new file mode 100644
index 0000000..e05cb08
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/header.go
@@ -0,0 +1,55 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"encoding/binary"
+	"fmt"
+	"net"
+)
+
+const (
+	Version   = 6  // protocol version
+	HeaderLen = 40 // header length
+)
+
+// A Header represents an IPv6 base header.
+type Header struct {
+	Version      int    // protocol version
+	TrafficClass int    // traffic class
+	FlowLabel    int    // flow label
+	PayloadLen   int    // payload length
+	NextHeader   int    // next header
+	HopLimit     int    // hop limit
+	Src          net.IP // source address
+	Dst          net.IP // destination address
+}
+
+func (h *Header) String() string {
+	if h == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ver=%d tclass=%#x flowlbl=%#x payloadlen=%d nxthdr=%d hoplim=%d src=%v dst=%v", h.Version, h.TrafficClass, h.FlowLabel, h.PayloadLen, h.NextHeader, h.HopLimit, h.Src, h.Dst)
+}
+
+// ParseHeader parses b as an IPv6 base header.
+func ParseHeader(b []byte) (*Header, error) {
+	if len(b) < HeaderLen {
+		return nil, errHeaderTooShort
+	}
+	h := &Header{
+		Version:      int(b[0]) >> 4,
+		TrafficClass: int(b[0]&0x0f)<<4 | int(b[1])>>4,
+		FlowLabel:    int(b[1]&0x0f)<<16 | int(b[2])<<8 | int(b[3]),
+		PayloadLen:   int(binary.BigEndian.Uint16(b[4:6])),
+		NextHeader:   int(b[6]),
+		HopLimit:     int(b[7]),
+	}
+	h.Src = make(net.IP, net.IPv6len)
+	copy(h.Src, b[8:24])
+	h.Dst = make(net.IP, net.IPv6len)
+	copy(h.Dst, b[24:40])
+	return h, nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/helper.go b/vendor/golang.org/x/net/ipv6/helper.go
new file mode 100644
index 0000000..2597401
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/helper.go
@@ -0,0 +1,57 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"errors"
+	"net"
+)
+
+var (
+	errMissingAddress  = errors.New("missing address")
+	errHeaderTooShort  = errors.New("header too short")
+	errInvalidConnType = errors.New("invalid conn type")
+	errOpNoSupport     = errors.New("operation not supported")
+	errNoSuchInterface = errors.New("no such interface")
+)
+
+func boolint(b bool) int {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func netAddrToIP16(a net.Addr) net.IP {
+	switch v := a.(type) {
+	case *net.UDPAddr:
+		if ip := v.IP.To16(); ip != nil && ip.To4() == nil {
+			return ip
+		}
+	case *net.IPAddr:
+		if ip := v.IP.To16(); ip != nil && ip.To4() == nil {
+			return ip
+		}
+	}
+	return nil
+}
+
+func opAddr(a net.Addr) net.Addr {
+	switch a.(type) {
+	case *net.TCPAddr:
+		if a == nil {
+			return nil
+		}
+	case *net.UDPAddr:
+		if a == nil {
+			return nil
+		}
+	case *net.IPAddr:
+		if a == nil {
+			return nil
+		}
+	}
+	return a
+}
diff --git a/vendor/golang.org/x/net/ipv6/iana.go b/vendor/golang.org/x/net/ipv6/iana.go
new file mode 100644
index 0000000..3c6214f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/iana.go
@@ -0,0 +1,82 @@
+// go generate gen.go
+// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
+
+package ipv6
+
+// Internet Control Message Protocol version 6 (ICMPv6) Parameters, Updated: 2015-07-07
+const (
+	ICMPTypeDestinationUnreachable                ICMPType = 1   // Destination Unreachable
+	ICMPTypePacketTooBig                          ICMPType = 2   // Packet Too Big
+	ICMPTypeTimeExceeded                          ICMPType = 3   // Time Exceeded
+	ICMPTypeParameterProblem                      ICMPType = 4   // Parameter Problem
+	ICMPTypeEchoRequest                           ICMPType = 128 // Echo Request
+	ICMPTypeEchoReply                             ICMPType = 129 // Echo Reply
+	ICMPTypeMulticastListenerQuery                ICMPType = 130 // Multicast Listener Query
+	ICMPTypeMulticastListenerReport               ICMPType = 131 // Multicast Listener Report
+	ICMPTypeMulticastListenerDone                 ICMPType = 132 // Multicast Listener Done
+	ICMPTypeRouterSolicitation                    ICMPType = 133 // Router Solicitation
+	ICMPTypeRouterAdvertisement                   ICMPType = 134 // Router Advertisement
+	ICMPTypeNeighborSolicitation                  ICMPType = 135 // Neighbor Solicitation
+	ICMPTypeNeighborAdvertisement                 ICMPType = 136 // Neighbor Advertisement
+	ICMPTypeRedirect                              ICMPType = 137 // Redirect Message
+	ICMPTypeRouterRenumbering                     ICMPType = 138 // Router Renumbering
+	ICMPTypeNodeInformationQuery                  ICMPType = 139 // ICMP Node Information Query
+	ICMPTypeNodeInformationResponse               ICMPType = 140 // ICMP Node Information Response
+	ICMPTypeInverseNeighborDiscoverySolicitation  ICMPType = 141 // Inverse Neighbor Discovery Solicitation Message
+	ICMPTypeInverseNeighborDiscoveryAdvertisement ICMPType = 142 // Inverse Neighbor Discovery Advertisement Message
+	ICMPTypeVersion2MulticastListenerReport       ICMPType = 143 // Version 2 Multicast Listener Report
+	ICMPTypeHomeAgentAddressDiscoveryRequest      ICMPType = 144 // Home Agent Address Discovery Request Message
+	ICMPTypeHomeAgentAddressDiscoveryReply        ICMPType = 145 // Home Agent Address Discovery Reply Message
+	ICMPTypeMobilePrefixSolicitation              ICMPType = 146 // Mobile Prefix Solicitation
+	ICMPTypeMobilePrefixAdvertisement             ICMPType = 147 // Mobile Prefix Advertisement
+	ICMPTypeCertificationPathSolicitation         ICMPType = 148 // Certification Path Solicitation Message
+	ICMPTypeCertificationPathAdvertisement        ICMPType = 149 // Certification Path Advertisement Message
+	ICMPTypeMulticastRouterAdvertisement          ICMPType = 151 // Multicast Router Advertisement
+	ICMPTypeMulticastRouterSolicitation           ICMPType = 152 // Multicast Router Solicitation
+	ICMPTypeMulticastRouterTermination            ICMPType = 153 // Multicast Router Termination
+	ICMPTypeFMIPv6                                ICMPType = 154 // FMIPv6 Messages
+	ICMPTypeRPLControl                            ICMPType = 155 // RPL Control Message
+	ICMPTypeILNPv6LocatorUpdate                   ICMPType = 156 // ILNPv6 Locator Update Message
+	ICMPTypeDuplicateAddressRequest               ICMPType = 157 // Duplicate Address Request
+	ICMPTypeDuplicateAddressConfirmation          ICMPType = 158 // Duplicate Address Confirmation
+	ICMPTypeMPLControl                            ICMPType = 159 // MPL Control Message
+)
+
+// Internet Control Message Protocol version 6 (ICMPv6) Parameters, Updated: 2015-07-07
+var icmpTypes = map[ICMPType]string{
+	1:   "destination unreachable",
+	2:   "packet too big",
+	3:   "time exceeded",
+	4:   "parameter problem",
+	128: "echo request",
+	129: "echo reply",
+	130: "multicast listener query",
+	131: "multicast listener report",
+	132: "multicast listener done",
+	133: "router solicitation",
+	134: "router advertisement",
+	135: "neighbor solicitation",
+	136: "neighbor advertisement",
+	137: "redirect message",
+	138: "router renumbering",
+	139: "icmp node information query",
+	140: "icmp node information response",
+	141: "inverse neighbor discovery solicitation message",
+	142: "inverse neighbor discovery advertisement message",
+	143: "version 2 multicast listener report",
+	144: "home agent address discovery request message",
+	145: "home agent address discovery reply message",
+	146: "mobile prefix solicitation",
+	147: "mobile prefix advertisement",
+	148: "certification path solicitation message",
+	149: "certification path advertisement message",
+	151: "multicast router advertisement",
+	152: "multicast router solicitation",
+	153: "multicast router termination",
+	154: "fmipv6 messages",
+	155: "rpl control message",
+	156: "ilnpv6 locator update message",
+	157: "duplicate address request",
+	158: "duplicate address confirmation",
+	159: "mpl control message",
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp.go b/vendor/golang.org/x/net/ipv6/icmp.go
new file mode 100644
index 0000000..b7f48e2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp.go
@@ -0,0 +1,60 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import "golang.org/x/net/internal/iana"
+
+// BUG(mikio): On Windows, methods related to ICMPFilter are not
+// implemented.
+
+// An ICMPType represents a type of ICMP message.
+type ICMPType int
+
+func (typ ICMPType) String() string {
+	s, ok := icmpTypes[typ]
+	if !ok {
+		return "<nil>"
+	}
+	return s
+}
+
+// Protocol returns the ICMPv6 protocol number.
+func (typ ICMPType) Protocol() int {
+	return iana.ProtocolIPv6ICMP
+}
+
+// An ICMPFilter represents an ICMP message filter for incoming
+// packets. The filter belongs to a packet delivery path on a host and
+// it cannot interact with forwarding packets or tunnel-outer packets.
+//
+// Note: RFC 8200 defines a reasonable role model. A node means a
+// device that implements IP. A router means a node that forwards IP
+// packets not explicitly addressed to itself, and a host means a node
+// that is not a router.
+type ICMPFilter struct {
+	icmpv6Filter
+}
+
+// Accept accepts incoming ICMP packets including the type field value
+// typ.
+func (f *ICMPFilter) Accept(typ ICMPType) {
+	f.accept(typ)
+}
+
+// Block blocks incoming ICMP packets including the type field value
+// typ.
+func (f *ICMPFilter) Block(typ ICMPType) {
+	f.block(typ)
+}
+
+// SetAll sets the filter action to the filter.
+func (f *ICMPFilter) SetAll(block bool) {
+	f.setAll(block)
+}
+
+// WillBlock reports whether the ICMP type will be blocked.
+func (f *ICMPFilter) WillBlock(typ ICMPType) bool {
+	return f.willBlock(typ)
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_bsd.go b/vendor/golang.org/x/net/ipv6/icmp_bsd.go
new file mode 100644
index 0000000..e1a791d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_bsd.go
@@ -0,0 +1,29 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package ipv6
+
+func (f *icmpv6Filter) accept(typ ICMPType) {
+	f.Filt[typ>>5] |= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpv6Filter) block(typ ICMPType) {
+	f.Filt[typ>>5] &^= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpv6Filter) setAll(block bool) {
+	for i := range f.Filt {
+		if block {
+			f.Filt[i] = 0
+		} else {
+			f.Filt[i] = 1<<32 - 1
+		}
+	}
+}
+
+func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
+	return f.Filt[typ>>5]&(1<<(uint32(typ)&31)) == 0
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_linux.go b/vendor/golang.org/x/net/ipv6/icmp_linux.go
new file mode 100644
index 0000000..647f6b4
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_linux.go
@@ -0,0 +1,27 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+func (f *icmpv6Filter) accept(typ ICMPType) {
+	f.Data[typ>>5] &^= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpv6Filter) block(typ ICMPType) {
+	f.Data[typ>>5] |= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpv6Filter) setAll(block bool) {
+	for i := range f.Data {
+		if block {
+			f.Data[i] = 1<<32 - 1
+		} else {
+			f.Data[i] = 0
+		}
+	}
+}
+
+func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
+	return f.Data[typ>>5]&(1<<(uint32(typ)&31)) != 0
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_solaris.go b/vendor/golang.org/x/net/ipv6/icmp_solaris.go
new file mode 100644
index 0000000..7c23bb1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_solaris.go
@@ -0,0 +1,27 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+func (f *icmpv6Filter) accept(typ ICMPType) {
+	f.X__icmp6_filt[typ>>5] |= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpv6Filter) block(typ ICMPType) {
+	f.X__icmp6_filt[typ>>5] &^= 1 << (uint32(typ) & 31)
+}
+
+func (f *icmpv6Filter) setAll(block bool) {
+	for i := range f.X__icmp6_filt {
+		if block {
+			f.X__icmp6_filt[i] = 0
+		} else {
+			f.X__icmp6_filt[i] = 1<<32 - 1
+		}
+	}
+}
+
+func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
+	return f.X__icmp6_filt[typ>>5]&(1<<(uint32(typ)&31)) == 0
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_stub.go b/vendor/golang.org/x/net/ipv6/icmp_stub.go
new file mode 100644
index 0000000..c4b9be6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_stub.go
@@ -0,0 +1,23 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv6
+
+type icmpv6Filter struct {
+}
+
+func (f *icmpv6Filter) accept(typ ICMPType) {
+}
+
+func (f *icmpv6Filter) block(typ ICMPType) {
+}
+
+func (f *icmpv6Filter) setAll(block bool) {
+}
+
+func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
+	return false
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_windows.go b/vendor/golang.org/x/net/ipv6/icmp_windows.go
new file mode 100644
index 0000000..443cd07
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_windows.go
@@ -0,0 +1,22 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+func (f *icmpv6Filter) accept(typ ICMPType) {
+	// TODO(mikio): implement this
+}
+
+func (f *icmpv6Filter) block(typ ICMPType) {
+	// TODO(mikio): implement this
+}
+
+func (f *icmpv6Filter) setAll(block bool) {
+	// TODO(mikio): implement this
+}
+
+func (f *icmpv6Filter) willBlock(typ ICMPType) bool {
+	// TODO(mikio): implement this
+	return false
+}
diff --git a/vendor/golang.org/x/net/ipv6/payload.go b/vendor/golang.org/x/net/ipv6/payload.go
new file mode 100644
index 0000000..a8197f1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload.go
@@ -0,0 +1,23 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+// BUG(mikio): On Windows, the ControlMessage for ReadFrom and WriteTo
+// methods of PacketConn is not implemented.
+
+// A payloadHandler represents the IPv6 datagram payload handler.
+type payloadHandler struct {
+	net.PacketConn
+	*socket.Conn
+	rawOpt
+}
+
+func (c *payloadHandler) ok() bool { return c != nil && c.PacketConn != nil && c.Conn != nil }
diff --git a/vendor/golang.org/x/net/ipv6/payload_cmsg.go b/vendor/golang.org/x/net/ipv6/payload_cmsg.go
new file mode 100644
index 0000000..4ee4b06
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload_cmsg.go
@@ -0,0 +1,35 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !nacl,!plan9,!windows
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+)
+
+// ReadFrom reads a payload of the received IPv6 datagram, from the
+// endpoint c, copying the payload into b. It returns the number of
+// bytes copied into b, the control message cm and the source address
+// src of the received datagram.
+func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	if !c.ok() {
+		return 0, nil, nil, syscall.EINVAL
+	}
+	return c.readFrom(b)
+}
+
+// WriteTo writes a payload of the IPv6 datagram, to the destination
+// address dst through the endpoint c, copying the payload from b. It
+// returns the number of bytes written. The control message cm allows
+// the IPv6 header fields and the datagram path to be specified. The
+// cm may be nil if control of the outgoing datagram is not required.
+func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	return c.writeTo(b, cm, dst)
+}
diff --git a/vendor/golang.org/x/net/ipv6/payload_cmsg_go1_8.go b/vendor/golang.org/x/net/ipv6/payload_cmsg_go1_8.go
new file mode 100644
index 0000000..fdc6c39
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload_cmsg_go1_8.go
@@ -0,0 +1,55 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.9
+// +build !nacl,!plan9,!windows
+
+package ipv6
+
+import "net"
+
+func (c *payloadHandler) readFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	c.rawOpt.RLock()
+	oob := NewControlMessage(c.rawOpt.cflags)
+	c.rawOpt.RUnlock()
+	var nn int
+	switch c := c.PacketConn.(type) {
+	case *net.UDPConn:
+		if n, nn, _, src, err = c.ReadMsgUDP(b, oob); err != nil {
+			return 0, nil, nil, err
+		}
+	case *net.IPConn:
+		if n, nn, _, src, err = c.ReadMsgIP(b, oob); err != nil {
+			return 0, nil, nil, err
+		}
+	default:
+		return 0, nil, nil, &net.OpError{Op: "read", Net: c.LocalAddr().Network(), Source: c.LocalAddr(), Err: errInvalidConnType}
+	}
+	if nn > 0 {
+		cm = new(ControlMessage)
+		if err = cm.Parse(oob[:nn]); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+	}
+	if cm != nil {
+		cm.Src = netAddrToIP16(src)
+	}
+	return
+}
+
+func (c *payloadHandler) writeTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	oob := cm.Marshal()
+	if dst == nil {
+		return 0, &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errMissingAddress}
+	}
+	switch c := c.PacketConn.(type) {
+	case *net.UDPConn:
+		n, _, err = c.WriteMsgUDP(b, oob, dst.(*net.UDPAddr))
+	case *net.IPConn:
+		n, _, err = c.WriteMsgIP(b, oob, dst.(*net.IPAddr))
+	default:
+		return 0, &net.OpError{Op: "write", Net: c.LocalAddr().Network(), Source: c.LocalAddr(), Addr: opAddr(dst), Err: errInvalidConnType}
+	}
+	return
+}
diff --git a/vendor/golang.org/x/net/ipv6/payload_cmsg_go1_9.go b/vendor/golang.org/x/net/ipv6/payload_cmsg_go1_9.go
new file mode 100644
index 0000000..8f6d02e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload_cmsg_go1_9.go
@@ -0,0 +1,57 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+// +build !nacl,!plan9,!windows
+
+package ipv6
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (c *payloadHandler) readFrom(b []byte) (int, *ControlMessage, net.Addr, error) {
+	c.rawOpt.RLock()
+	m := socket.Message{
+		Buffers: [][]byte{b},
+		OOB:     NewControlMessage(c.rawOpt.cflags),
+	}
+	c.rawOpt.RUnlock()
+	switch c.PacketConn.(type) {
+	case *net.UDPConn:
+		if err := c.RecvMsg(&m, 0); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+	case *net.IPConn:
+		if err := c.RecvMsg(&m, 0); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+	default:
+		return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errInvalidConnType}
+	}
+	var cm *ControlMessage
+	if m.NN > 0 {
+		cm = new(ControlMessage)
+		if err := cm.Parse(m.OOB[:m.NN]); err != nil {
+			return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
+		}
+		cm.Src = netAddrToIP16(m.Addr)
+	}
+	return m.N, cm, m.Addr, nil
+}
+
+func (c *payloadHandler) writeTo(b []byte, cm *ControlMessage, dst net.Addr) (int, error) {
+	m := socket.Message{
+		Buffers: [][]byte{b},
+		OOB:     cm.Marshal(),
+		Addr:    dst,
+	}
+	err := c.SendMsg(&m, 0)
+	if err != nil {
+		err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Addr: opAddr(dst), Err: err}
+	}
+	return m.N, err
+}
diff --git a/vendor/golang.org/x/net/ipv6/payload_nocmsg.go b/vendor/golang.org/x/net/ipv6/payload_nocmsg.go
new file mode 100644
index 0000000..99a4354
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload_nocmsg.go
@@ -0,0 +1,41 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build nacl plan9 windows
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+)
+
+// ReadFrom reads a payload of the received IPv6 datagram, from the
+// endpoint c, copying the payload into b. It returns the number of
+// bytes copied into b, the control message cm and the source address
+// src of the received datagram.
+func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	if !c.ok() {
+		return 0, nil, nil, syscall.EINVAL
+	}
+	if n, src, err = c.PacketConn.ReadFrom(b); err != nil {
+		return 0, nil, nil, err
+	}
+	return
+}
+
+// WriteTo writes a payload of the IPv6 datagram, to the destination
+// address dst through the endpoint c, copying the payload from b. It
+// returns the number of bytes written. The control message cm allows
+// the IPv6 header fields and the datagram path to be specified. The
+// cm may be nil if control of the outgoing datagram is not required.
+func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	if dst == nil {
+		return 0, errMissingAddress
+	}
+	return c.PacketConn.WriteTo(b, dst)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt.go b/vendor/golang.org/x/net/ipv6/sockopt.go
new file mode 100644
index 0000000..cc3907d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt.go
@@ -0,0 +1,43 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import "golang.org/x/net/internal/socket"
+
+// Sticky socket options
+const (
+	ssoTrafficClass        = iota // header field for unicast packet, RFC 3542
+	ssoHopLimit                   // header field for unicast packet, RFC 3493
+	ssoMulticastInterface         // outbound interface for multicast packet, RFC 3493
+	ssoMulticastHopLimit          // header field for multicast packet, RFC 3493
+	ssoMulticastLoopback          // loopback for multicast packet, RFC 3493
+	ssoReceiveTrafficClass        // header field on received packet, RFC 3542
+	ssoReceiveHopLimit            // header field on received packet, RFC 2292 or 3542
+	ssoReceivePacketInfo          // incbound or outbound packet path, RFC 2292 or 3542
+	ssoReceivePathMTU             // path mtu, RFC 3542
+	ssoPathMTU                    // path mtu, RFC 3542
+	ssoChecksum                   // packet checksum, RFC 2292 or 3542
+	ssoICMPFilter                 // icmp filter, RFC 2292 or 3542
+	ssoJoinGroup                  // any-source multicast, RFC 3493
+	ssoLeaveGroup                 // any-source multicast, RFC 3493
+	ssoJoinSourceGroup            // source-specific multicast
+	ssoLeaveSourceGroup           // source-specific multicast
+	ssoBlockSourceGroup           // any-source or source-specific multicast
+	ssoUnblockSourceGroup         // any-source or source-specific multicast
+	ssoAttachFilter               // attach BPF for filtering inbound traffic
+)
+
+// Sticky socket option value types
+const (
+	ssoTypeIPMreq = iota + 1
+	ssoTypeGroupReq
+	ssoTypeGroupSourceReq
+)
+
+// A sockOpt represents a binding for sticky socket option.
+type sockOpt struct {
+	socket.Option
+	typ int // hint for option value type; optional
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_posix.go b/vendor/golang.org/x/net/ipv6/sockopt_posix.go
new file mode 100644
index 0000000..0eac86e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_posix.go
@@ -0,0 +1,87 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package ipv6
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
+	n, err := so.GetInt(c)
+	if err != nil {
+		return nil, err
+	}
+	return net.InterfaceByIndex(n)
+}
+
+func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
+	var n int
+	if ifi != nil {
+		n = ifi.Index
+	}
+	return so.SetInt(c, n)
+}
+
+func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
+	b := make([]byte, so.Len)
+	n, err := so.Get(c, b)
+	if err != nil {
+		return nil, err
+	}
+	if n != sizeofICMPv6Filter {
+		return nil, errOpNoSupport
+	}
+	return (*ICMPFilter)(unsafe.Pointer(&b[0])), nil
+}
+
+func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
+	b := (*[sizeofICMPv6Filter]byte)(unsafe.Pointer(f))[:sizeofICMPv6Filter]
+	return so.Set(c, b)
+}
+
+func (so *sockOpt) getMTUInfo(c *socket.Conn) (*net.Interface, int, error) {
+	b := make([]byte, so.Len)
+	n, err := so.Get(c, b)
+	if err != nil {
+		return nil, 0, err
+	}
+	if n != sizeofIPv6Mtuinfo {
+		return nil, 0, errOpNoSupport
+	}
+	mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0]))
+	if mi.Addr.Scope_id == 0 {
+		return nil, int(mi.Mtu), nil
+	}
+	ifi, err := net.InterfaceByIndex(int(mi.Addr.Scope_id))
+	if err != nil {
+		return nil, 0, err
+	}
+	return ifi, int(mi.Mtu), nil
+}
+
+func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	switch so.typ {
+	case ssoTypeIPMreq:
+		return so.setIPMreq(c, ifi, grp)
+	case ssoTypeGroupReq:
+		return so.setGroupReq(c, ifi, grp)
+	default:
+		return errOpNoSupport
+	}
+}
+
+func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	return so.setGroupSourceReq(c, ifi, grp, src)
+}
+
+func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
+	return so.setAttachFilter(c, f)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_stub.go b/vendor/golang.org/x/net/ipv6/sockopt_stub.go
new file mode 100644
index 0000000..1f4a273
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_stub.go
@@ -0,0 +1,46 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv6
+
+import (
+	"net"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) getMulticastInterface(c *socket.Conn) (*net.Interface, error) {
+	return nil, errOpNoSupport
+}
+
+func (so *sockOpt) setMulticastInterface(c *socket.Conn, ifi *net.Interface) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) getICMPFilter(c *socket.Conn) (*ICMPFilter, error) {
+	return nil, errOpNoSupport
+}
+
+func (so *sockOpt) setICMPFilter(c *socket.Conn, f *ICMPFilter) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) getMTUInfo(c *socket.Conn) (*net.Interface, int, error) {
+	return nil, 0, errOpNoSupport
+}
+
+func (so *sockOpt) setGroup(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setSourceGroup(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setBPF(c *socket.Conn, f []bpf.RawInstruction) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_asmreq.go b/vendor/golang.org/x/net/ipv6/sys_asmreq.go
new file mode 100644
index 0000000..b0510c0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_asmreq.go
@@ -0,0 +1,24 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package ipv6
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setIPMreq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	var mreq ipv6Mreq
+	copy(mreq.Multiaddr[:], grp)
+	if ifi != nil {
+		mreq.setIfindex(ifi.Index)
+	}
+	b := (*[sizeofIPv6Mreq]byte)(unsafe.Pointer(&mreq))[:sizeofIPv6Mreq]
+	return so.Set(c, b)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_asmreq_stub.go b/vendor/golang.org/x/net/ipv6/sys_asmreq_stub.go
new file mode 100644
index 0000000..eece961
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_asmreq_stub.go
@@ -0,0 +1,17 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv6
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setIPMreq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_bpf.go b/vendor/golang.org/x/net/ipv6/sys_bpf.go
new file mode 100644
index 0000000..b2dbcb2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_bpf.go
@@ -0,0 +1,23 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+
+package ipv6
+
+import (
+	"unsafe"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
+	prog := sockFProg{
+		Len:    uint16(len(f)),
+		Filter: (*sockFilter)(unsafe.Pointer(&f[0])),
+	}
+	b := (*[sizeofSockFprog]byte)(unsafe.Pointer(&prog))[:sizeofSockFprog]
+	return so.Set(c, b)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_bpf_stub.go b/vendor/golang.org/x/net/ipv6/sys_bpf_stub.go
new file mode 100644
index 0000000..676bea5
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_bpf_stub.go
@@ -0,0 +1,16 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !linux
+
+package ipv6
+
+import (
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setAttachFilter(c *socket.Conn, f []bpf.RawInstruction) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_bsd.go b/vendor/golang.org/x/net/ipv6/sys_bsd.go
new file mode 100644
index 0000000..e416eaa
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_bsd.go
@@ -0,0 +1,57 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build dragonfly netbsd openbsd
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlNextHop:      {sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
+		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
+		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
+		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
+		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
+		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
+		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
+		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
+		ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
+		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}},
+		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}},
+		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_JOIN_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_LEAVE_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
+	}
+)
+
+func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *inet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *ipv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_darwin.go b/vendor/golang.org/x/net/ipv6/sys_darwin.go
new file mode 100644
index 0000000..e3d0443
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_darwin.go
@@ -0,0 +1,106 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"strconv"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlHopLimit:   {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},
+		ctlPacketInfo: {sysIPV6_2292PKTINFO, sizeofInet6Pktinfo, marshal2292PacketInfo, parsePacketInfo},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoHopLimit:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
+		ssoMulticastHopLimit:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveHopLimit:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_2292HOPLIMIT, Len: 4}},
+		ssoReceivePacketInfo:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_2292PKTINFO, Len: 4}},
+		ssoChecksum:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}},
+		ssoICMPFilter:         {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_JOIN_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_LEAVE_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
+	}
+)
+
+func init() {
+	// Seems like kern.osreldate is veiled on latest OS X. We use
+	// kern.osrelease instead.
+	s, err := syscall.Sysctl("kern.osrelease")
+	if err != nil {
+		return
+	}
+	ss := strings.Split(s, ".")
+	if len(ss) == 0 {
+		return
+	}
+	// The IP_PKTINFO and protocol-independent multicast API were
+	// introduced in OS X 10.7 (Darwin 11). But it looks like
+	// those features require OS X 10.8 (Darwin 12) or above.
+	// See http://support.apple.com/kb/HT1633.
+	if mjver, err := strconv.Atoi(ss[0]); err != nil || mjver < 12 {
+		return
+	}
+	ctlOpts[ctlTrafficClass] = ctlOpt{sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass}
+	ctlOpts[ctlHopLimit] = ctlOpt{sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit}
+	ctlOpts[ctlPacketInfo] = ctlOpt{sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo}
+	ctlOpts[ctlNextHop] = ctlOpt{sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop}
+	ctlOpts[ctlPathMTU] = ctlOpt{sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU}
+	sockOpts[ssoTrafficClass] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}}
+	sockOpts[ssoReceiveTrafficClass] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}}
+	sockOpts[ssoReceiveHopLimit] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}}
+	sockOpts[ssoReceivePacketInfo] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}}
+	sockOpts[ssoReceivePathMTU] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}}
+	sockOpts[ssoPathMTU] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}}
+	sockOpts[ssoJoinGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
+	sockOpts[ssoLeaveGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
+	sockOpts[ssoJoinSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+	sockOpts[ssoLeaveSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+	sockOpts[ssoBlockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+	sockOpts[ssoUnblockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
+}
+
+func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *inet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *ipv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 132))
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_freebsd.go b/vendor/golang.org/x/net/ipv6/sys_freebsd.go
new file mode 100644
index 0000000..e9349dc
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_freebsd.go
@@ -0,0 +1,92 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"runtime"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlNextHop:      {sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = map[int]sockOpt{
+		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
+		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
+		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
+		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
+		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
+		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
+		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
+		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
+		ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
+		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}},
+		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}},
+		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+	}
+)
+
+func init() {
+	if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
+		archs, _ := syscall.Sysctl("kern.supported_archs")
+		for _, s := range strings.Fields(archs) {
+			if s == "amd64" {
+				freebsd32o64 = true
+				break
+			}
+		}
+	}
+}
+
+func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *inet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *ipv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group))
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group))
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source))
+	sa.Len = sizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_linux.go b/vendor/golang.org/x/net/ipv6/sys_linux.go
new file mode 100644
index 0000000..bc21810
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_linux.go
@@ -0,0 +1,74 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
+		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
+		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
+		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
+		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
+		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
+		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
+		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
+		ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
+		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolReserved, Name: sysIPV6_CHECKSUM, Len: 4}},
+		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMPV6_FILTER, Len: sizeofICMPv6Filter}},
+		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoAttachFilter:        {Option: socket.Option{Level: sysSOL_SOCKET, Name: sysSO_ATTACH_FILTER, Len: sizeofSockFprog}},
+	}
+)
+
+func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *inet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = int32(i)
+}
+
+func (mreq *ipv6Mreq) setIfindex(i int) {
+	mreq.Ifindex = int32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_solaris.go b/vendor/golang.org/x/net/ipv6/sys_solaris.go
new file mode 100644
index 0000000..d348b5f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_solaris.go
@@ -0,0 +1,74 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlNextHop:      {sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = map[int]*sockOpt{
+		ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
+		ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
+		ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
+		ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
+		ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
+		ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
+		ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
+		ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
+		ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
+		ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
+		ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}},
+		ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}},
+		ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
+		ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
+	}
+)
+
+func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *inet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *ipv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
+
+func (gr *groupReq) setGroup(grp net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 260))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_ssmreq.go b/vendor/golang.org/x/net/ipv6/sys_ssmreq.go
new file mode 100644
index 0000000..add8ccc
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_ssmreq.go
@@ -0,0 +1,54 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin freebsd linux solaris
+
+package ipv6
+
+import (
+	"net"
+	"unsafe"
+
+	"golang.org/x/net/internal/socket"
+)
+
+var freebsd32o64 bool
+
+func (so *sockOpt) setGroupReq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	var gr groupReq
+	if ifi != nil {
+		gr.Interface = uint32(ifi.Index)
+	}
+	gr.setGroup(grp)
+	var b []byte
+	if freebsd32o64 {
+		var d [sizeofGroupReq + 4]byte
+		s := (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))
+		copy(d[:4], s[:4])
+		copy(d[8:], s[4:])
+		b = d[:]
+	} else {
+		b = (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))[:sizeofGroupReq]
+	}
+	return so.Set(c, b)
+}
+
+func (so *sockOpt) setGroupSourceReq(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	var gsr groupSourceReq
+	if ifi != nil {
+		gsr.Interface = uint32(ifi.Index)
+	}
+	gsr.setSourceGroup(grp, src)
+	var b []byte
+	if freebsd32o64 {
+		var d [sizeofGroupSourceReq + 4]byte
+		s := (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
+		copy(d[:4], s[:4])
+		copy(d[8:], s[4:])
+		b = d[:]
+	} else {
+		b = (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))[:sizeofGroupSourceReq]
+	}
+	return so.Set(c, b)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_ssmreq_stub.go b/vendor/golang.org/x/net/ipv6/sys_ssmreq_stub.go
new file mode 100644
index 0000000..581ee49
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_ssmreq_stub.go
@@ -0,0 +1,21 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!freebsd,!linux,!solaris
+
+package ipv6
+
+import (
+	"net"
+
+	"golang.org/x/net/internal/socket"
+)
+
+func (so *sockOpt) setGroupReq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
+
+func (so *sockOpt) setGroupSourceReq(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_stub.go b/vendor/golang.org/x/net/ipv6/sys_stub.go
new file mode 100644
index 0000000..b845388
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_stub.go
@@ -0,0 +1,13 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package ipv6
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{}
+
+	sockOpts = map[int]*sockOpt{}
+)
diff --git a/vendor/golang.org/x/net/ipv6/sys_windows.go b/vendor/golang.org/x/net/ipv6/sys_windows.go
new file mode 100644
index 0000000..fc36b01
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_windows.go
@@ -0,0 +1,75 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/socket"
+)
+
+const (
+	// See ws2tcpip.h.
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PKTINFO        = 0x13
+
+	sizeofSockaddrInet6 = 0x1c
+
+	sizeofIPv6Mreq     = 0x14
+	sizeofIPv6Mtuinfo  = 0x20
+	sizeofICMPv6Filter = 0
+)
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type icmpv6Filter struct {
+	// TODO(mikio): implement this
+}
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{}
+
+	sockOpts = map[int]*sockOpt{
+		ssoHopLimit:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
+		ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
+		ssoMulticastHopLimit:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
+		ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
+		ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_JOIN_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
+		ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_LEAVE_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
+	}
+)
+
+func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (mreq *ipv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_darwin.go b/vendor/golang.org/x/net/ipv6/zsys_darwin.go
new file mode 100644
index 0000000..6aab1df
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_darwin.go
@@ -0,0 +1,131 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+
+	sysIPV6_PORTRANGE    = 0xe
+	sysICMP6_FILTER      = 0x12
+	sysIPV6_2292PKTINFO  = 0x13
+	sysIPV6_2292HOPLIMIT = 0x14
+	sysIPV6_2292NEXTHOP  = 0x15
+	sysIPV6_2292HOPOPTS  = 0x16
+	sysIPV6_2292DSTOPTS  = 0x17
+	sysIPV6_2292RTHDR    = 0x18
+
+	sysIPV6_2292PKTOPTIONS = 0x19
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RECVTCLASS = 0x23
+	sysIPV6_TCLASS     = 0x24
+
+	sysIPV6_RTHDRDSTOPTS = 0x39
+
+	sysIPV6_RECVPKTINFO = 0x3d
+
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_MSFILTER            = 0x4a
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_BOUND_IF = 0x7d
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet6   = 0x1c
+	sizeofInet6Pktinfo    = 0x14
+	sizeofIPv6Mtuinfo     = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+	Pad_cgo_1 [128]byte
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_dragonfly.go b/vendor/golang.org/x/net/ipv6/zsys_dragonfly.go
new file mode 100644
index 0000000..d2de804
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_dragonfly.go
@@ -0,0 +1,88 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_dragonfly.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrInet6 = 0x1c
+	sizeofInet6Pktinfo  = 0x14
+	sizeofIPv6Mtuinfo   = 0x20
+
+	sizeofIPv6Mreq = 0x14
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_freebsd_386.go b/vendor/golang.org/x/net/ipv6/zsys_freebsd_386.go
new file mode 100644
index 0000000..919e572
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_freebsd_386.go
@@ -0,0 +1,122 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_BINDANY = 0x40
+
+	sysIPV6_MSFILTER = 0x4a
+
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet6   = 0x1c
+	sizeofInet6Pktinfo    = 0x14
+	sizeofIPv6Mtuinfo     = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     sockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     sockaddrStorage
+	Source    sockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_freebsd_amd64.go b/vendor/golang.org/x/net/ipv6/zsys_freebsd_amd64.go
new file mode 100644
index 0000000..cb8141f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_freebsd_amd64.go
@@ -0,0 +1,124 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_BINDANY = 0x40
+
+	sysIPV6_MSFILTER = 0x4a
+
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet6   = 0x1c
+	sizeofInet6Pktinfo    = 0x14
+	sizeofIPv6Mtuinfo     = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+	Source    sockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_freebsd_arm.go b/vendor/golang.org/x/net/ipv6/zsys_freebsd_arm.go
new file mode 100644
index 0000000..cb8141f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_freebsd_arm.go
@@ -0,0 +1,124 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_BINDANY = 0x40
+
+	sysIPV6_MSFILTER = 0x4a
+
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrStorage = 0x80
+	sizeofSockaddrInet6   = 0x1c
+	sizeofInet6Pktinfo    = 0x14
+	sizeofIPv6Mtuinfo     = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sockaddrStorage
+	Source    sockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_386.go b/vendor/golang.org/x/net/ipv6/zsys_linux_386.go
new file mode 100644
index 0000000..73aa8c6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_386.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_amd64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_amd64.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_amd64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_arm.go b/vendor/golang.org/x/net/ipv6/zsys_linux_arm.go
new file mode 100644
index 0000000..73aa8c6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_arm.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_arm64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_arm64.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_arm64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_mips.go b/vendor/golang.org/x/net/ipv6/zsys_linux_mips.go
new file mode 100644
index 0000000..73aa8c6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_mips.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_mips64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_mips64le.go b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64le.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64le.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_mipsle.go b/vendor/golang.org/x/net/ipv6/zsys_linux_mipsle.go
new file mode 100644
index 0000000..73aa8c6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_mipsle.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_ppc.go b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc.go
new file mode 100644
index 0000000..c9bf6a8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x84
+	sizeofGroupSourceReq = 0x104
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x8
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]uint8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64le.go b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64le.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64le.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_s390x.go b/vendor/golang.org/x/net/ipv6/zsys_linux_s390x.go
new file mode 100644
index 0000000..b64f015
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_s390x.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sizeofKernelSockaddrStorage = 0x80
+	sizeofSockaddrInet6         = 0x1c
+	sizeofInet6Pktinfo          = 0x14
+	sizeofIPv6Mtuinfo           = 0x20
+	sizeofIPv6FlowlabelReq      = 0x20
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x88
+	sizeofGroupSourceReq = 0x108
+
+	sizeofICMPv6Filter = 0x20
+
+	sizeofSockFprog = 0x10
+)
+
+type kernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     kernelSockaddrStorage
+	Source    kernelSockaddrStorage
+}
+
+type icmpv6Filter struct {
+	Data [8]uint32
+}
+
+type sockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sockFilter
+}
+
+type sockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_netbsd.go b/vendor/golang.org/x/net/ipv6/zsys_netbsd.go
new file mode 100644
index 0000000..bcada13
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_netbsd.go
@@ -0,0 +1,84 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_netbsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+	sysIPV6_PATHMTU     = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrInet6 = 0x1c
+	sizeofInet6Pktinfo  = 0x14
+	sizeofIPv6Mtuinfo   = 0x20
+
+	sizeofIPv6Mreq = 0x14
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_openbsd.go b/vendor/golang.org/x/net/ipv6/zsys_openbsd.go
new file mode 100644
index 0000000..86cf3c6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_openbsd.go
@@ -0,0 +1,93 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_openbsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_AUTH_LEVEL        = 0x35
+	sysIPV6_ESP_TRANS_LEVEL   = 0x36
+	sysIPV6_ESP_NETWORK_LEVEL = 0x37
+	sysIPSEC6_OUTSA           = 0x38
+	sysIPV6_RECVTCLASS        = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+	sysIPV6_IPCOMP_LEVEL  = 0x3c
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+	sysIPV6_PIPEX    = 0x3f
+
+	sysIPV6_RTABLE = 0x1021
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sizeofSockaddrInet6 = 0x1c
+	sizeofInet6Pktinfo  = 0x14
+	sizeofIPv6Mtuinfo   = 0x20
+
+	sizeofIPv6Mreq = 0x14
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type icmpv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_solaris.go b/vendor/golang.org/x/net/ipv6/zsys_solaris.go
new file mode 100644
index 0000000..cf1837d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_solaris.go
@@ -0,0 +1,131 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_solaris.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x5
+	sysIPV6_MULTICAST_IF   = 0x6
+	sysIPV6_MULTICAST_HOPS = 0x7
+	sysIPV6_MULTICAST_LOOP = 0x8
+	sysIPV6_JOIN_GROUP     = 0x9
+	sysIPV6_LEAVE_GROUP    = 0xa
+
+	sysIPV6_PKTINFO = 0xb
+
+	sysIPV6_HOPLIMIT = 0xc
+	sysIPV6_NEXTHOP  = 0xd
+	sysIPV6_HOPOPTS  = 0xe
+	sysIPV6_DSTOPTS  = 0xf
+
+	sysIPV6_RTHDR        = 0x10
+	sysIPV6_RTHDRDSTOPTS = 0x11
+
+	sysIPV6_RECVPKTINFO  = 0x12
+	sysIPV6_RECVHOPLIMIT = 0x13
+	sysIPV6_RECVHOPOPTS  = 0x14
+
+	sysIPV6_RECVRTHDR = 0x16
+
+	sysIPV6_RECVRTHDRDSTOPTS = 0x17
+
+	sysIPV6_CHECKSUM        = 0x18
+	sysIPV6_RECVTCLASS      = 0x19
+	sysIPV6_USE_MIN_MTU     = 0x20
+	sysIPV6_DONTFRAG        = 0x21
+	sysIPV6_SEC_OPT         = 0x22
+	sysIPV6_SRC_PREFERENCES = 0x23
+	sysIPV6_RECVPATHMTU     = 0x24
+	sysIPV6_PATHMTU         = 0x25
+	sysIPV6_TCLASS          = 0x26
+	sysIPV6_V6ONLY          = 0x27
+
+	sysIPV6_RECVDSTOPTS = 0x28
+
+	sysMCAST_JOIN_GROUP         = 0x29
+	sysMCAST_LEAVE_GROUP        = 0x2a
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2d
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2e
+
+	sysIPV6_PREFER_SRC_HOME   = 0x1
+	sysIPV6_PREFER_SRC_COA    = 0x2
+	sysIPV6_PREFER_SRC_PUBLIC = 0x4
+	sysIPV6_PREFER_SRC_TMP    = 0x8
+	sysIPV6_PREFER_SRC_NONCGA = 0x10
+	sysIPV6_PREFER_SRC_CGA    = 0x20
+
+	sysIPV6_PREFER_SRC_MIPMASK    = 0x3
+	sysIPV6_PREFER_SRC_MIPDEFAULT = 0x1
+	sysIPV6_PREFER_SRC_TMPMASK    = 0xc
+	sysIPV6_PREFER_SRC_TMPDEFAULT = 0x4
+	sysIPV6_PREFER_SRC_CGAMASK    = 0x30
+	sysIPV6_PREFER_SRC_CGADEFAULT = 0x10
+
+	sysIPV6_PREFER_SRC_MASK = 0x3f
+
+	sysIPV6_PREFER_SRC_DEFAULT = 0x15
+
+	sysIPV6_BOUND_IF   = 0x41
+	sysIPV6_UNSPEC_SRC = 0x42
+
+	sysICMP6_FILTER = 0x1
+
+	sizeofSockaddrStorage = 0x100
+	sizeofSockaddrInet6   = 0x20
+	sizeofInet6Pktinfo    = 0x14
+	sizeofIPv6Mtuinfo     = 0x24
+
+	sizeofIPv6Mreq       = 0x14
+	sizeofGroupReq       = 0x104
+	sizeofGroupSourceReq = 0x204
+
+	sizeofICMPv6Filter = 0x20
+)
+
+type sockaddrStorage struct {
+	Family     uint16
+	X_ss_pad1  [6]int8
+	X_ss_align float64
+	X_ss_pad2  [240]int8
+}
+
+type sockaddrInet6 struct {
+	Family         uint16
+	Port           uint16
+	Flowinfo       uint32
+	Addr           [16]byte /* in6_addr */
+	Scope_id       uint32
+	X__sin6_src_id uint32
+}
+
+type inet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type ipv6Mtuinfo struct {
+	Addr sockaddrInet6
+	Mtu  uint32
+}
+
+type ipv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type groupReq struct {
+	Interface uint32
+	Pad_cgo_0 [256]byte
+}
+
+type groupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [256]byte
+	Pad_cgo_1 [256]byte
+}
+
+type icmpv6Filter struct {
+	X__icmp6_filt [8]uint32
+}