vendor/golang.org/x/net/ipv6/sys_linux.go

   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 package ipv6
   6
   7 import (
   8         "net"
   9         "syscall"
  10         "unsafe"
  11
  12         "golang.org/x/net/internal/iana"
  13         "golang.org/x/net/internal/socket"
  14 )
  15
  16 var (
  17         ctlOpts = [ctlMax]ctlOpt{
  18                 ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
  19                 ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
  20                 ctlPacketInfo:   {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
  21                 ctlPathMTU:      {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
  22         }
  23
  24         sockOpts = map[int]*sockOpt{
  25                 ssoTrafficClass:        {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
  26                 ssoHopLimit:            {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
  27                 ssoMulticastInterface:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
  28                 ssoMulticastHopLimit:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
  29                 ssoMulticastLoopback:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
  30                 ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
  31                 ssoReceiveHopLimit:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
  32                 ssoReceivePacketInfo:   {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
  33                 ssoReceivePathMTU:      {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
  34                 ssoPathMTU:             {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
  35                 ssoChecksum:            {Option: socket.Option{Level: iana.ProtocolReserved, Name: sysIPV6_CHECKSUM, Len: 4}},
  36                 ssoICMPFilter:          {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMPV6_FILTER, Len: sizeofICMPv6Filter}},
  37                 ssoJoinGroup:           {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  38                 ssoLeaveGroup:          {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
  39                 ssoJoinSourceGroup:     {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  40                 ssoLeaveSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  41                 ssoBlockSourceGroup:    {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  42                 ssoUnblockSourceGroup:  {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
  43                 ssoAttachFilter:        {Option: socket.Option{Level: sysSOL_SOCKET, Name: sysSO_ATTACH_FILTER, Len: sizeofSockFprog}},
  44         }
  45 )
  46
  47 func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
  48         sa.Family = syscall.AF_INET6
  49         copy(sa.Addr[:], ip)
  50         sa.Scope_id = uint32(i)
  51 }
  52
  53 func (pi *inet6Pktinfo) setIfindex(i int) {
  54         pi.Ifindex = int32(i)
  55 }
  56
  57 func (mreq *ipv6Mreq) setIfindex(i int) {
  58         mreq.Ifindex = int32(i)
  59 }
  60
  61 func (gr *groupReq) setGroup(grp net.IP) {
  62         sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group))
  63         sa.Family = syscall.AF_INET6
  64         copy(sa.Addr[:], grp)
  65 }
  66
  67 func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
  68         sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group))
  69         sa.Family = syscall.AF_INET6
  70         copy(sa.Addr[:], grp)
  71         sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source))
  72         sa.Family = syscall.AF_INET6
  73         copy(sa.Addr[:], src)
  74 }