| // Copyright 2013 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 darwin dragonfly freebsd linux netbsd openbsd solaris |
| |
| package ipv6 |
| |
| import ( |
| "net" |
| "unsafe" |
| |
| "golang.org/x/net/internal/iana" |
| "golang.org/x/net/internal/socket" |
| ) |
| |
| func marshalTrafficClass(b []byte, cm *ControlMessage) []byte { |
| m := socket.ControlMessage(b) |
| m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_TCLASS, 4) |
| if cm != nil { |
| socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.TrafficClass)) |
| } |
| return m.Next(4) |
| } |
| |
| func parseTrafficClass(cm *ControlMessage, b []byte) { |
| cm.TrafficClass = int(socket.NativeEndian.Uint32(b[:4])) |
| } |
| |
| func marshalHopLimit(b []byte, cm *ControlMessage) []byte { |
| m := socket.ControlMessage(b) |
| m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_HOPLIMIT, 4) |
| if cm != nil { |
| socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit)) |
| } |
| return m.Next(4) |
| } |
| |
| func parseHopLimit(cm *ControlMessage, b []byte) { |
| cm.HopLimit = int(socket.NativeEndian.Uint32(b[:4])) |
| } |
| |
| func marshalPacketInfo(b []byte, cm *ControlMessage) []byte { |
| m := socket.ControlMessage(b) |
| m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_PKTINFO, sizeofInet6Pktinfo) |
| if cm != nil { |
| pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0])) |
| if ip := cm.Src.To16(); ip != nil && ip.To4() == nil { |
| copy(pi.Addr[:], ip) |
| } |
| if cm.IfIndex > 0 { |
| pi.setIfindex(cm.IfIndex) |
| } |
| } |
| return m.Next(sizeofInet6Pktinfo) |
| } |
| |
| func parsePacketInfo(cm *ControlMessage, b []byte) { |
| pi := (*inet6Pktinfo)(unsafe.Pointer(&b[0])) |
| if len(cm.Dst) < net.IPv6len { |
| cm.Dst = make(net.IP, net.IPv6len) |
| } |
| copy(cm.Dst, pi.Addr[:]) |
| cm.IfIndex = int(pi.Ifindex) |
| } |
| |
| func marshalNextHop(b []byte, cm *ControlMessage) []byte { |
| m := socket.ControlMessage(b) |
| m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_NEXTHOP, sizeofSockaddrInet6) |
| if cm != nil { |
| sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0])) |
| sa.setSockaddr(cm.NextHop, cm.IfIndex) |
| } |
| return m.Next(sizeofSockaddrInet6) |
| } |
| |
| func parseNextHop(cm *ControlMessage, b []byte) { |
| } |
| |
| func marshalPathMTU(b []byte, cm *ControlMessage) []byte { |
| m := socket.ControlMessage(b) |
| m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_PATHMTU, sizeofIPv6Mtuinfo) |
| return m.Next(sizeofIPv6Mtuinfo) |
| } |
| |
| func parsePathMTU(cm *ControlMessage, b []byte) { |
| mi := (*ipv6Mtuinfo)(unsafe.Pointer(&b[0])) |
| if len(cm.Dst) < net.IPv6len { |
| cm.Dst = make(net.IP, net.IPv6len) |
| } |
| copy(cm.Dst, mi.Addr.Addr[:]) |
| cm.IfIndex = int(mi.Addr.Scope_id) |
| cm.MTU = int(mi.Mtu) |
| } |
