1 // Copyright 2013 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 linux netbsd openbsd solaris
13 "golang.org/x/net/internal/iana"
14 "golang.org/x/net/internal/socket"
17 func marshalTrafficClass(b []byte, cm *ControlMessage) []byte {
18 m := socket.ControlMessage(b)
19 m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_TCLASS, 4)
21 socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.TrafficClass))
26 func parseTrafficClass(cm *ControlMessage, b []byte) {
27 cm.TrafficClass = int(socket.NativeEndian.Uint32(b[:4]))
30 func marshalHopLimit(b []byte, cm *ControlMessage) []byte {
31 m := socket.ControlMessage(b)
32 m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_HOPLIMIT, 4)
34 socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit))
39 func parseHopLimit(cm *ControlMessage, b []byte) {
40 cm.HopLimit = int(socket.NativeEndian.Uint32(b[:4]))
43 func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
44 m := socket.ControlMessage(b)
45 m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_PKTINFO, sizeofInet6Pktinfo)
47 pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0]))
48 if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
52 pi.setIfindex(cm.IfIndex)
55 return m.Next(sizeofInet6Pktinfo)
58 func parsePacketInfo(cm *ControlMessage, b []byte) {
59 pi := (*inet6Pktinfo)(unsafe.Pointer(&b[0]))
60 if len(cm.Dst) < net.IPv6len {
61 cm.Dst = make(net.IP, net.IPv6len)
63 copy(cm.Dst, pi.Addr[:])
64 cm.IfIndex = int(pi.Ifindex)
67 func marshalNextHop(b []byte, cm *ControlMessage) []byte {
68 m := socket.ControlMessage(b)
69 m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_NEXTHOP, sizeofSockaddrInet6)
71 sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0]))
72 sa.setSockaddr(cm.NextHop, cm.IfIndex)
74 return m.Next(sizeofSockaddrInet6)
77 func parseNextHop(cm *ControlMessage, b []byte) {
80 func marshalPathMTU(b []byte, cm *ControlMessage) []byte {
81 m := socket.ControlMessage(b)
82 m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_PATHMTU, sizeofIPv6Mtuinfo)
83 return m.Next(sizeofIPv6Mtuinfo)
86 func parsePathMTU(cm *ControlMessage, b []byte) {
87 mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0]))
88 if len(cm.Dst) < net.IPv6len {
89 cm.Dst = make(net.IP, net.IPv6len)
91 copy(cm.Dst, mi.Addr.Addr[:])
92 cm.IfIndex = int(mi.Addr.Scope_id)