1 // Copyright 2012 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.
5 // +build darwin dragonfly freebsd netbsd openbsd
14 "golang.org/x/net/internal/iana"
15 "golang.org/x/net/internal/socket"
18 func marshalDst(b []byte, cm *ControlMessage) []byte {
19 m := socket.ControlMessage(b)
20 m.MarshalHeader(iana.ProtocolIP, sysIP_RECVDSTADDR, net.IPv4len)
21 return m.Next(net.IPv4len)
24 func parseDst(cm *ControlMessage, b []byte) {
25 if len(cm.Dst) < net.IPv4len {
26 cm.Dst = make(net.IP, net.IPv4len)
28 copy(cm.Dst, b[:net.IPv4len])
31 func marshalInterface(b []byte, cm *ControlMessage) []byte {
32 m := socket.ControlMessage(b)
33 m.MarshalHeader(iana.ProtocolIP, sysIP_RECVIF, syscall.SizeofSockaddrDatalink)
34 return m.Next(syscall.SizeofSockaddrDatalink)
37 func parseInterface(cm *ControlMessage, b []byte) {
38 sadl := (*syscall.SockaddrDatalink)(unsafe.Pointer(&b[0]))
39 cm.IfIndex = int(sadl.Index)