107 lines
5.3 KiB
Go
107 lines
5.3 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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"strconv"
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"strings"
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"syscall"
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"unsafe"
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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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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, sizeofInet6Pktinfo, marshal2292PacketInfo, parsePacketInfo},
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}
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sockOpts = map[int]*sockOpt{
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ssoHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}},
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ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}},
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ssoMulticastHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}},
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ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}},
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ssoReceiveHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_2292HOPLIMIT, Len: 4}},
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ssoReceivePacketInfo: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_2292PKTINFO, Len: 4}},
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ssoChecksum: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}},
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ssoICMPFilter: {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}},
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ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_JOIN_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq},
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ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_LEAVE_GROUP, Len: sizeofIPv6Mreq}, typ: 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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s, 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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ss := strings.Split(s, ".")
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if len(ss) == 0 {
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return
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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). But it looks like
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// those features require OS X 10.8 (Darwin 12) or above.
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// See http://support.apple.com/kb/HT1633.
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if mjver, err := strconv.Atoi(ss[0]); err != nil || mjver < 12 {
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return
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}
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ctlOpts[ctlTrafficClass] = ctlOpt{sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass}
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ctlOpts[ctlHopLimit] = ctlOpt{sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit}
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ctlOpts[ctlPacketInfo] = ctlOpt{sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo}
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ctlOpts[ctlNextHop] = ctlOpt{sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop}
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ctlOpts[ctlPathMTU] = ctlOpt{sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU}
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sockOpts[ssoTrafficClass] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}}
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sockOpts[ssoReceiveTrafficClass] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}}
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sockOpts[ssoReceiveHopLimit] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}}
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sockOpts[ssoReceivePacketInfo] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}}
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sockOpts[ssoReceivePathMTU] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}}
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sockOpts[ssoPathMTU] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}}
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sockOpts[ssoJoinGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
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sockOpts[ssoLeaveGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}
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sockOpts[ssoJoinSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
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sockOpts[ssoLeaveSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
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sockOpts[ssoBlockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
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sockOpts[ssoUnblockSourceGroup] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}
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}
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func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) {
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sa.Len = sizeofSockaddrInet6
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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 *inet6Pktinfo) setIfindex(i int) {
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pi.Ifindex = uint32(i)
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}
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func (mreq *ipv6Mreq) setIfindex(i int) {
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mreq.Interface = uint32(i)
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}
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func (gr *groupReq) setGroup(grp net.IP) {
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sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
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sa.Len = sizeofSockaddrInet6
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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 *groupSourceReq) setSourceGroup(grp, src net.IP) {
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sa := (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
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sa.Len = sizeofSockaddrInet6
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sa.Family = syscall.AF_INET6
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copy(sa.Addr[:], grp)
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sa = (*sockaddrInet6)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 132))
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sa.Len = sizeofSockaddrInet6
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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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