vendor/golang.org/x/net/ipv4/sys_windows.go

   1 // Copyright 2014 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 ipv4
   6
   7 import (
   8         "golang.org/x/net/internal/iana"
   9         "golang.org/x/net/internal/socket"
  10 )
  11
  12 const (
  13         // See ws2tcpip.h.
  14         sysIP_OPTIONS                = 0x1
  15         sysIP_HDRINCL                = 0x2
  16         sysIP_TOS                    = 0x3
  17         sysIP_TTL                    = 0x4
  18         sysIP_MULTICAST_IF           = 0x9
  19         sysIP_MULTICAST_TTL          = 0xa
  20         sysIP_MULTICAST_LOOP         = 0xb
  21         sysIP_ADD_MEMBERSHIP         = 0xc
  22         sysIP_DROP_MEMBERSHIP        = 0xd
  23         sysIP_DONTFRAGMENT           = 0xe
  24         sysIP_ADD_SOURCE_MEMBERSHIP  = 0xf
  25         sysIP_DROP_SOURCE_MEMBERSHIP = 0x10
  26         sysIP_PKTINFO                = 0x13
  27
  28         sizeofInetPktinfo  = 0x8
  29         sizeofIPMreq       = 0x8
  30         sizeofIPMreqSource = 0xc
  31 )
  32
  33 type inetPktinfo struct {
  34         Addr    [4]byte
  35         Ifindex int32
  36 }
  37
  38 type ipMreq struct {
  39         Multiaddr [4]byte
  40         Interface [4]byte
  41 }
  42
  43 type ipMreqSource struct {
  44         Multiaddr  [4]byte
  45         Sourceaddr [4]byte
  46         Interface  [4]byte
  47 }
  48
  49 // See http://msdn.microsoft.com/en-us/library/windows/desktop/ms738586(v=vs.85).aspx
  50 var (
  51         ctlOpts = [ctlMax]ctlOpt{}
  52
  53         sockOpts = map[int]*sockOpt{
  54                 ssoTOS:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
  55                 ssoTTL:                {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
  56                 ssoMulticastTTL:       {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 4}},
  57                 ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
  58                 ssoMulticastLoopback:  {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
  59                 ssoHeaderPrepend:      {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
  60                 ssoJoinGroup:          {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
  61                 ssoLeaveGroup:         {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
  62         }
  63 )
  64
  65 func (pi *inetPktinfo) setIfindex(i int) {
  66         pi.Ifindex = int32(i)
  67 }