| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package ipv6 |
| |
| import ( |
| "net" |
| "runtime" |
| "strings" |
| "syscall" |
| "unsafe" |
| |
| "golang.org/x/net/internal/iana" |
| "golang.org/x/net/internal/socket" |
| ) |
| |
| var ( |
| ctlOpts = [ctlMax]ctlOpt{ |
| ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass}, |
| ctlHopLimit: {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit}, |
| ctlPacketInfo: {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo}, |
| ctlNextHop: {sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop}, |
| ctlPathMTU: {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU}, |
| } |
| |
| sockOpts = map[int]sockOpt{ |
| ssoTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}}, |
| ssoHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}}, |
| ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}}, |
| ssoMulticastHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}}, |
| ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}}, |
| ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}}, |
| ssoReceiveHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}}, |
| ssoReceivePacketInfo: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}}, |
| ssoReceivePathMTU: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}}, |
| ssoPathMTU: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}}, |
| ssoChecksum: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}}, |
| ssoICMPFilter: {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}}, |
| ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}, |
| ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}, |
| ssoJoinSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| ssoLeaveSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| ssoBlockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| } |
| ) |
| |
| func init() { |
| if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" { |
| archs, _ := syscall.Sysctl("kern.supported_archs") |
| for _, s := range strings.Fields(archs) { |
| if s == "amd64" { |
| compatFreeBSD32 = true |
| break |
| } |
| } |
| } |
| } |
| |
| func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) { |
| sa.Len = sizeofSockaddrInet6 |
| sa.Family = syscall.AF_INET6 |
| copy(sa.Addr[:], ip) |
| sa.Scope_id = uint32(i) |
| } |
| |
| func (pi *inet6Pktinfo) setIfindex(i int) { |
| pi.Ifindex = uint32(i) |
| } |
| |
| func (mreq *ipv6Mreq) setIfindex(i int) { |
| mreq.Interface = uint32(i) |
| } |
| |
| func (gr *groupReq) setGroup(grp net.IP) { |
| sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group)) |
| sa.Len = sizeofSockaddrInet6 |
| sa.Family = syscall.AF_INET6 |
| copy(sa.Addr[:], grp) |
| } |
| |
| func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) { |
| sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group)) |
| sa.Len = sizeofSockaddrInet6 |
| sa.Family = syscall.AF_INET6 |
| copy(sa.Addr[:], grp) |
| sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source)) |
| sa.Len = sizeofSockaddrInet6 |
| sa.Family = syscall.AF_INET6 |
| copy(sa.Addr[:], src) |
| } |