93 lines
4.1 KiB
Go
93 lines
4.1 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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"runtime"
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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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ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
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ctlHopLimit: {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
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ctlPacketInfo: {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
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ctlNextHop: {sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop},
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ctlPathMTU: {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
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}
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sockOpts = map[int]sockOpt{
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ssoTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}},
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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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ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}},
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ssoReceiveHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}},
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ssoReceivePacketInfo: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}},
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ssoReceivePathMTU: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}},
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ssoPathMTU: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}},
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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: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
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ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
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ssoJoinSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoLeaveSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoBlockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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}
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)
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func init() {
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if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
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archs, _ := syscall.Sysctl("kern.supported_archs")
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for _, s := range strings.Fields(archs) {
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if s == "amd64" {
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freebsd32o64 = true
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break
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}
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}
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}
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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(&gr.Group))
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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(&gsr.Group))
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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(&gsr.Source))
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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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