// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ipv4
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import (
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"golang.org/x/net/internal/iana"
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"golang.org/x/net/internal/socket"
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)
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const (
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// See ws2tcpip.h.
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sysIP_OPTIONS = 0x1
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sysIP_HDRINCL = 0x2
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sysIP_TOS = 0x3
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sysIP_TTL = 0x4
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sysIP_MULTICAST_IF = 0x9
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sysIP_MULTICAST_TTL = 0xa
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sysIP_MULTICAST_LOOP = 0xb
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sysIP_ADD_MEMBERSHIP = 0xc
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sysIP_DROP_MEMBERSHIP = 0xd
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sysIP_DONTFRAGMENT = 0xe
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sysIP_ADD_SOURCE_MEMBERSHIP = 0xf
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sysIP_DROP_SOURCE_MEMBERSHIP = 0x10
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sysIP_PKTINFO = 0x13
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sizeofInetPktinfo = 0x8
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sizeofIPMreq = 0x8
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sizeofIPMreqSource = 0xc
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)
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type inetPktinfo struct {
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Addr [4]byte
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Ifindex int32
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}
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type ipMreq struct {
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Multiaddr [4]byte
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Interface [4]byte
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}
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type ipMreqSource struct {
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Multiaddr [4]byte
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Sourceaddr [4]byte
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Interface [4]byte
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}
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// See http://msdn.microsoft.com/en-us/library/windows/desktop/ms738586(v=vs.85).aspx
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var (
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ctlOpts = [ctlMax]ctlOpt{}
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sockOpts = map[int]*sockOpt{
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ssoTOS: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TOS, Len: 4}},
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ssoTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_TTL, Len: 4}},
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ssoMulticastTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_TTL, Len: 4}},
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ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_IF, Len: 4}},
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ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_MULTICAST_LOOP, Len: 4}},
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ssoHeaderPrepend: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_HDRINCL, Len: 4}},
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ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_ADD_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
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ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: sysIP_DROP_MEMBERSHIP, Len: sizeofIPMreq}, typ: ssoTypeIPMreq},
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}
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)
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func (pi *inetPktinfo) setIfindex(i int) {
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pi.Ifindex = int32(i)
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}
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