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 | "syscall" |
| 10 | |
| 11 | "golang.org/x/net/internal/iana" |
| 12 | "golang.org/x/net/internal/socket" |
| 13 | ) |
| 14 | |
| 15 | const ( |
| 16 | // See ws2tcpip.h. |
| 17 | sysIPV6_UNICAST_HOPS = 0x4 |
| 18 | sysIPV6_MULTICAST_IF = 0x9 |
| 19 | sysIPV6_MULTICAST_HOPS = 0xa |
| 20 | sysIPV6_MULTICAST_LOOP = 0xb |
| 21 | sysIPV6_JOIN_GROUP = 0xc |
| 22 | sysIPV6_LEAVE_GROUP = 0xd |
| 23 | sysIPV6_PKTINFO = 0x13 |
| 24 | |
| 25 | sizeofSockaddrInet6 = 0x1c |
| 26 | |
| 27 | sizeofIPv6Mreq = 0x14 |
| 28 | sizeofIPv6Mtuinfo = 0x20 |
| 29 | sizeofICMPv6Filter = 0 |
| 30 | ) |
| 31 | |
| 32 | type sockaddrInet6 struct { |
| 33 | Family uint16 |
| 34 | Port uint16 |
| 35 | Flowinfo uint32 |
| 36 | Addr [16]byte /* in6_addr */ |
| 37 | Scope_id uint32 |
| 38 | } |
| 39 | |
| 40 | type ipv6Mreq struct { |
| 41 | Multiaddr [16]byte /* in6_addr */ |
| 42 | Interface uint32 |
| 43 | } |
| 44 | |
| 45 | type ipv6Mtuinfo struct { |
| 46 | Addr sockaddrInet6 |
| 47 | Mtu uint32 |
| 48 | } |
| 49 | |
| 50 | type icmpv6Filter struct { |
| 51 | // TODO(mikio): implement this |
| 52 | } |
| 53 | |
| 54 | var ( |
| 55 | ctlOpts = [ctlMax]ctlOpt{} |
| 56 | |
| 57 | sockOpts = map[int]*sockOpt{ |
| 58 | ssoHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_UNICAST_HOPS, Len: 4}}, |
| 59 | ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_IF, Len: 4}}, |
| 60 | ssoMulticastHopLimit: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_HOPS, Len: 4}}, |
| 61 | ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_MULTICAST_LOOP, Len: 4}}, |
| 62 | ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_JOIN_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq}, |
| 63 | ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIPv6, Name: sysIPV6_LEAVE_GROUP, Len: sizeofIPv6Mreq}, typ: ssoTypeIPMreq}, |
| 64 | } |
| 65 | ) |
| 66 | |
| 67 | func (sa *sockaddrInet6) setSockaddr(ip net.IP, i int) { |
| 68 | sa.Family = syscall.AF_INET6 |
| 69 | copy(sa.Addr[:], ip) |
| 70 | sa.Scope_id = uint32(i) |
| 71 | } |
| 72 | |
| 73 | func (mreq *ipv6Mreq) setIfindex(i int) { |
| 74 | mreq.Interface = uint32(i) |
| 75 | } |