1 // Copyright 2017 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
6 // +build !nacl,!plan9,!windows
13 "golang.org/x/net/internal/socket"
16 func (c *payloadHandler) readFrom(b []byte) (int, *ControlMessage, net.Addr, error) {
20 OOB: NewControlMessage(c.rawOpt.cflags),
23 switch c.PacketConn.(type) {
25 if err := c.RecvMsg(&m, 0); err != nil {
26 return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
29 if err := c.RecvMsg(&m, 0); err != nil {
30 return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
33 return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: errInvalidConnType}
35 var cm *ControlMessage
37 cm = new(ControlMessage)
38 if err := cm.Parse(m.OOB[:m.NN]); err != nil {
39 return 0, nil, nil, &net.OpError{Op: "read", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Err: err}
41 cm.Src = netAddrToIP16(m.Addr)
43 return m.N, cm, m.Addr, nil
46 func (c *payloadHandler) writeTo(b []byte, cm *ControlMessage, dst net.Addr) (int, error) {
52 err := c.SendMsg(&m, 0)
54 err = &net.OpError{Op: "write", Net: c.PacketConn.LocalAddr().Network(), Source: c.PacketConn.LocalAddr(), Addr: opAddr(dst), Err: err}