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// 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 aix darwin dragonfly freebsd linux netbsd openbsd solaris windows zos
package socket
import (
"os"
"runtime"
"syscall"
)
func (c *Conn) recvMsg(m *Message, flags int) error {
m.raceWrite()
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 || (runtime.GOOS == "zos" && operr == syscall.EWOULDBLOCK) {
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 {
m.raceRead()
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 || (runtime.GOOS == "zos" && operr == syscall.EWOULDBLOCK) {
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
}
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