David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Copyright 2013 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package ipv6 |
| 6 | |
| 7 | import ( |
| 8 | "net" |
| 9 | "runtime" |
| 10 | "strings" |
| 11 | "syscall" |
| 12 | "unsafe" |
| 13 | |
| 14 | "golang.org/x/net/internal/iana" |
| 15 | "golang.org/x/net/internal/socket" |
| 16 | ) |
| 17 | |
| 18 | var ( |
| 19 | ctlOpts = [ctlMax]ctlOpt{ |
| 20 | ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass}, |
| 21 | ctlHopLimit: {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit}, |
| 22 | ctlPacketInfo: {sysIPV6_PKTINFO, sizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo}, |
| 23 | ctlNextHop: {sysIPV6_NEXTHOP, sizeofSockaddrInet6, marshalNextHop, parseNextHop}, |
| 24 | ctlPathMTU: {sysIPV6_PATHMTU, sizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU}, |
| 25 | } |
| 26 | |
| 27 | sockOpts = map[int]sockOpt{ |
| 28 | ssoTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_TCLASS, Len: 4}}, |
| 29 | ssoHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}}, |
| 30 | ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}}, |
| 31 | ssoMulticastHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}}, |
| 32 | ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}}, |
| 33 | ssoReceiveTrafficClass: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVTCLASS, Len: 4}}, |
| 34 | ssoReceiveHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVHOPLIMIT, Len: 4}}, |
| 35 | ssoReceivePacketInfo: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPKTINFO, Len: 4}}, |
| 36 | ssoReceivePathMTU: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_RECVPATHMTU, Len: 4}}, |
| 37 | ssoPathMTU: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_PATHMTU, Len: sizeofIPv6Mtuinfo}}, |
| 38 | ssoChecksum: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_CHECKSUM, Len: 4}}, |
| 39 | ssoICMPFilter: {Option: socket.Option{Level: iana.ProtocolIPv6ICMP, Name: sysICMP6_FILTER, Len: sizeofICMPv6Filter}}, |
| 40 | ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}, |
| 41 | ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}, |
| 42 | ssoJoinSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| 43 | ssoLeaveSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| 44 | ssoBlockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| 45 | ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysMCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, |
| 46 | } |
| 47 | ) |
| 48 | |
| 49 | func init() { |
| 50 | if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" { |
| 51 | archs, _ := syscall.Sysctl("kern.supported_archs") |
| 52 | for _, s := range strings.Fields(archs) { |
| 53 | if s == "amd64" { |
| 54 | freebsd32o64 = true |
| 55 | break |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) { |
| 62 | sa.Len = sizeofSockaddrInet6 |
| 63 | sa.Family = syscall.AF_INET6 |
| 64 | copy(sa.Addr[:], ip) |
| 65 | sa.Scope_id = uint32(i) |
| 66 | } |
| 67 | |
| 68 | func (pi *inet6Pktinfo) setIfindex(i int) { |
| 69 | pi.Ifindex = uint32(i) |
| 70 | } |
| 71 | |
| 72 | func (mreq *ipv6Mreq) setIfindex(i int) { |
| 73 | mreq.Interface = uint32(i) |
| 74 | } |
| 75 | |
| 76 | func (gr *groupReq) setGroup(grp net.IP) { |
| 77 | sa := (*sockaddrInet6)(unsafe.Pointer(&gr.Group)) |
| 78 | sa.Len = sizeofSockaddrInet6 |
| 79 | sa.Family = syscall.AF_INET6 |
| 80 | copy(sa.Addr[:], grp) |
| 81 | } |
| 82 | |
| 83 | func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) { |
| 84 | sa := (*sockaddrInet6)(unsafe.Pointer(&gsr.Group)) |
| 85 | sa.Len = sizeofSockaddrInet6 |
| 86 | sa.Family = syscall.AF_INET6 |
| 87 | copy(sa.Addr[:], grp) |
| 88 | sa = (*sockaddrInet6)(unsafe.Pointer(&gsr.Source)) |
| 89 | sa.Len = sizeofSockaddrInet6 |
| 90 | sa.Family = syscall.AF_INET6 |
| 91 | copy(sa.Addr[:], src) |
| 92 | } |