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
5package ipv6
6
7import (
8	"net"
9	"syscall"
10
11	"golang.org/x/net/internal/iana"
12	"golang.org/x/net/internal/socket"
13)
14
15const (
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
32type sockaddrInet6 struct {
33	Family   uint16
34	Port     uint16
35	Flowinfo uint32
36	Addr     [16]byte /* in6_addr */
37	Scope_id uint32
38}
39
40type ipv6Mreq struct {
41	Multiaddr [16]byte /* in6_addr */
42	Interface uint32
43}
44
45type ipv6Mtuinfo struct {
46	Addr sockaddrInet6
47	Mtu  uint32
48}
49
50type icmpv6Filter struct {
51	// TODO(mikio): implement this
52}
53
54var (
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
67func (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
73func (mreq *ipv6Mreq) setIfindex(i int) {
74	mreq.Interface = uint32(i)
75}
76