// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris windows
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package socket
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import (
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"os"
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"syscall"
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)
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func (c *Conn) recvMsg(m *Message, flags int) error {
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var h msghdr
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vs := make([]iovec, len(m.Buffers))
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var sa []byte
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if c.network != "tcp" {
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sa = make([]byte, sizeofSockaddrInet6)
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}
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h.pack(vs, m.Buffers, m.OOB, sa)
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var operr error
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var n int
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fn := func(s uintptr) bool {
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n, operr = recvmsg(s, &h, flags)
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if operr == syscall.EAGAIN {
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return false
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}
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return true
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}
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if err := c.c.Read(fn); err != nil {
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return err
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}
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if operr != nil {
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return os.NewSyscallError("recvmsg", operr)
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}
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if c.network != "tcp" {
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var err error
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m.Addr, err = parseInetAddr(sa[:], c.network)
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if err != nil {
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return err
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}
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}
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m.N = n
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m.NN = h.controllen()
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m.Flags = h.flags()
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return nil
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}
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func (c *Conn) sendMsg(m *Message, flags int) error {
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var h msghdr
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vs := make([]iovec, len(m.Buffers))
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var sa []byte
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if m.Addr != nil {
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sa = marshalInetAddr(m.Addr)
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}
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h.pack(vs, m.Buffers, m.OOB, sa)
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var operr error
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var n int
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fn := func(s uintptr) bool {
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n, operr = sendmsg(s, &h, flags)
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if operr == syscall.EAGAIN {
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return false
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}
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return true
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}
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if err := c.c.Write(fn); err != nil {
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return err
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}
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if operr != nil {
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return os.NewSyscallError("sendmsg", operr)
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}
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m.N = n
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m.NN = len(m.OOB)
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return nil
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}
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