David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 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. |
| 4 | |
| 5 | // +build darwin |
| 6 | |
| 7 | package ipv6 |
| 8 | |
| 9 | import ( |
| 10 | "unsafe" |
| 11 | |
| 12 | "golang.org/x/net/internal/iana" |
| 13 | "golang.org/x/net/internal/socket" |
| 14 | ) |
| 15 | |
| 16 | func marshal2292HopLimit(b []byte, cm *ControlMessage) []byte { |
| 17 | m := socket.ControlMessage(b) |
| 18 | m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, 4) |
| 19 | if cm != nil { |
| 20 | socket.NativeEndian.PutUint32(m.Data(4), uint32(cm.HopLimit)) |
| 21 | } |
| 22 | return m.Next(4) |
| 23 | } |
| 24 | |
| 25 | func marshal2292PacketInfo(b []byte, cm *ControlMessage) []byte { |
| 26 | m := socket.ControlMessage(b) |
| 27 | m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292PKTINFO, sizeofInet6Pktinfo) |
| 28 | if cm != nil { |
| 29 | pi := (*inet6Pktinfo)(unsafe.Pointer(&m.Data(sizeofInet6Pktinfo)[0])) |
| 30 | if ip := cm.Src.To16(); ip != nil && ip.To4() == nil { |
| 31 | copy(pi.Addr[:], ip) |
| 32 | } |
| 33 | if cm.IfIndex > 0 { |
| 34 | pi.setIfindex(cm.IfIndex) |
| 35 | } |
| 36 | } |
| 37 | return m.Next(sizeofInet6Pktinfo) |
| 38 | } |
| 39 | |
| 40 | func marshal2292NextHop(b []byte, cm *ControlMessage) []byte { |
| 41 | m := socket.ControlMessage(b) |
| 42 | m.MarshalHeader(iana.ProtocolIPv6, sysIPV6_2292NEXTHOP, sizeofSockaddrInet6) |
| 43 | if cm != nil { |
| 44 | sa := (*sockaddrInet6)(unsafe.Pointer(&m.Data(sizeofSockaddrInet6)[0])) |
| 45 | sa.setSockaddr(cm.NextHop, cm.IfIndex) |
| 46 | } |
| 47 | return m.Next(sizeofSockaddrInet6) |
| 48 | } |