133 lines
5.1 KiB
Go
133 lines
5.1 KiB
Go
// Copyright 2013 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 ipv6
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import (
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"net"
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"syscall"
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"unsafe"
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"golang.org/x/net/internal/iana"
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)
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var (
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ctlOpts = [ctlMax]ctlOpt{
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ctlHopLimit: {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},
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ctlPacketInfo: {sysIPV6_2292PKTINFO, sysSizeofInet6Pktinfo, marshal2292PacketInfo, parsePacketInfo},
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}
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sockOpts = [ssoMax]sockOpt{
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ssoHopLimit: {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
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ssoMulticastInterface: {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
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ssoMulticastHopLimit: {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
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ssoMulticastLoopback: {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
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ssoReceiveHopLimit: {iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, ssoTypeInt},
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ssoReceivePacketInfo: {iana.ProtocolIPv6, sysIPV6_2292PKTINFO, ssoTypeInt},
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ssoChecksum: {iana.ProtocolIPv6, sysIPV6_CHECKSUM, ssoTypeInt},
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ssoICMPFilter: {iana.ProtocolIPv6ICMP, sysICMP6_FILTER, ssoTypeICMPFilter},
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ssoJoinGroup: {iana.ProtocolIPv6, sysIPV6_JOIN_GROUP, ssoTypeIPMreq},
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ssoLeaveGroup: {iana.ProtocolIPv6, sysIPV6_LEAVE_GROUP, ssoTypeIPMreq},
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}
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)
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func init() {
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// Seems like kern.osreldate is veiled on latest OS X. We use
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// kern.osrelease instead.
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osver, err := syscall.Sysctl("kern.osrelease")
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if err != nil {
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return
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}
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var i int
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for i = range osver {
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if osver[i] == '.' {
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break
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}
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}
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// The IP_PKTINFO and protocol-independent multicast API were
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// introduced in OS X 10.7 (Darwin 11.0.0). But it looks like
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// those features require OS X 10.8 (Darwin 12.0.0) and above.
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// See http://support.apple.com/kb/HT1633.
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if i > 2 || i == 2 && osver[0] >= '1' && osver[1] >= '2' {
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ctlOpts[ctlTrafficClass].name = sysIPV6_TCLASS
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ctlOpts[ctlTrafficClass].length = 4
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ctlOpts[ctlTrafficClass].marshal = marshalTrafficClass
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ctlOpts[ctlTrafficClass].parse = parseTrafficClass
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ctlOpts[ctlHopLimit].name = sysIPV6_HOPLIMIT
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ctlOpts[ctlHopLimit].marshal = marshalHopLimit
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ctlOpts[ctlPacketInfo].name = sysIPV6_PKTINFO
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ctlOpts[ctlPacketInfo].marshal = marshalPacketInfo
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ctlOpts[ctlNextHop].name = sysIPV6_NEXTHOP
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ctlOpts[ctlNextHop].length = sysSizeofSockaddrInet6
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ctlOpts[ctlNextHop].marshal = marshalNextHop
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ctlOpts[ctlNextHop].parse = parseNextHop
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ctlOpts[ctlPathMTU].name = sysIPV6_PATHMTU
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ctlOpts[ctlPathMTU].length = sysSizeofIPv6Mtuinfo
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ctlOpts[ctlPathMTU].marshal = marshalPathMTU
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ctlOpts[ctlPathMTU].parse = parsePathMTU
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sockOpts[ssoTrafficClass].level = iana.ProtocolIPv6
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sockOpts[ssoTrafficClass].name = sysIPV6_TCLASS
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sockOpts[ssoTrafficClass].typ = ssoTypeInt
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sockOpts[ssoReceiveTrafficClass].level = iana.ProtocolIPv6
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sockOpts[ssoReceiveTrafficClass].name = sysIPV6_RECVTCLASS
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sockOpts[ssoReceiveTrafficClass].typ = ssoTypeInt
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sockOpts[ssoReceiveHopLimit].name = sysIPV6_RECVHOPLIMIT
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sockOpts[ssoReceivePacketInfo].name = sysIPV6_RECVPKTINFO
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sockOpts[ssoReceivePathMTU].level = iana.ProtocolIPv6
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sockOpts[ssoReceivePathMTU].name = sysIPV6_RECVPATHMTU
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sockOpts[ssoReceivePathMTU].typ = ssoTypeInt
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sockOpts[ssoPathMTU].level = iana.ProtocolIPv6
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sockOpts[ssoPathMTU].name = sysIPV6_PATHMTU
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sockOpts[ssoPathMTU].typ = ssoTypeMTUInfo
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sockOpts[ssoJoinGroup].name = sysMCAST_JOIN_GROUP
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sockOpts[ssoJoinGroup].typ = ssoTypeGroupReq
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sockOpts[ssoLeaveGroup].name = sysMCAST_LEAVE_GROUP
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sockOpts[ssoLeaveGroup].typ = ssoTypeGroupReq
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sockOpts[ssoJoinSourceGroup].level = iana.ProtocolIPv6
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sockOpts[ssoJoinSourceGroup].name = sysMCAST_JOIN_SOURCE_GROUP
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sockOpts[ssoJoinSourceGroup].typ = ssoTypeGroupSourceReq
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sockOpts[ssoLeaveSourceGroup].level = iana.ProtocolIPv6
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sockOpts[ssoLeaveSourceGroup].name = sysMCAST_LEAVE_SOURCE_GROUP
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sockOpts[ssoLeaveSourceGroup].typ = ssoTypeGroupSourceReq
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sockOpts[ssoBlockSourceGroup].level = iana.ProtocolIPv6
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sockOpts[ssoBlockSourceGroup].name = sysMCAST_BLOCK_SOURCE
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sockOpts[ssoBlockSourceGroup].typ = ssoTypeGroupSourceReq
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sockOpts[ssoUnblockSourceGroup].level = iana.ProtocolIPv6
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sockOpts[ssoUnblockSourceGroup].name = sysMCAST_UNBLOCK_SOURCE
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sockOpts[ssoUnblockSourceGroup].typ = ssoTypeGroupSourceReq
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}
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}
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func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
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sa.Len = sysSizeofSockaddrInet6
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sa.Family = syscall.AF_INET6
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copy(sa.Addr[:], ip)
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sa.Scope_id = uint32(i)
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}
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func (pi *sysInet6Pktinfo) setIfindex(i int) {
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pi.Ifindex = uint32(i)
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}
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func (mreq *sysIPv6Mreq) setIfindex(i int) {
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mreq.Interface = uint32(i)
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}
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func (gr *sysGroupReq) setGroup(grp net.IP) {
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sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Pad_cgo_0[0]))
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sa.Len = sysSizeofSockaddrInet6
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sa.Family = syscall.AF_INET6
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copy(sa.Addr[:], grp)
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}
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func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
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sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_0[0]))
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sa.Len = sysSizeofSockaddrInet6
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sa.Family = syscall.AF_INET6
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copy(sa.Addr[:], grp)
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sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_1[0]))
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sa.Len = sysSizeofSockaddrInet6
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sa.Family = syscall.AF_INET6
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copy(sa.Addr[:], src)
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}
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