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1/*
2 * Types and definitions for AF_INET6
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Sources:
9 * IPv6 Program Interfaces for BSD Systems
10 * <draft-ietf-ipngwg-bsd-api-05.txt>
11 *
12 * Advanced Sockets API for IPv6
13 * <draft-stevens-advanced-api-00.txt>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21#ifndef _LINUX_IN6_H
22#define _LINUX_IN6_H
23
24#include <linux/types.h>
25
26/*
27 * IPv6 address structure
28 */
29
30struct in6_addr
31{
32 union
33 {
34 __u8 u6_addr8[16];
35 __be16 u6_addr16[8];
36 __be32 u6_addr32[4];
37 } in6_u;
38#define s6_addr in6_u.u6_addr8
39#define s6_addr16 in6_u.u6_addr16
40#define s6_addr32 in6_u.u6_addr32
41};
42
43/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
44 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
45 * in network byte order, not in host byte order as are the IPv4 equivalents
46 */
47extern const struct in6_addr in6addr_any;
48#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
49extern const struct in6_addr in6addr_loopback;
50#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
51#ifdef __KERNEL__
52extern const struct in6_addr in6addr_linklocal_allnodes;
53#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
54 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
55extern const struct in6_addr in6addr_linklocal_allrouters;
56#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
57 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } }
58#endif
59
60struct sockaddr_in6 {
61 unsigned short int sin6_family; /* AF_INET6 */
62 __be16 sin6_port; /* Transport layer port # */
63 __be32 sin6_flowinfo; /* IPv6 flow information */
64 struct in6_addr sin6_addr; /* IPv6 address */
65 __u32 sin6_scope_id; /* scope id (new in RFC2553) */
66};
67
68struct ipv6_mreq {
69 /* IPv6 multicast address of group */
70 struct in6_addr ipv6mr_multiaddr;
71
72 /* local IPv6 address of interface */
73 int ipv6mr_ifindex;
74};
75
76#define ipv6mr_acaddr ipv6mr_multiaddr
77
78struct in6_flowlabel_req
79{
80 struct in6_addr flr_dst;
81 __be32 flr_label;
82 __u8 flr_action;
83 __u8 flr_share;
84 __u16 flr_flags;
85 __u16 flr_expires;
86 __u16 flr_linger;
87 __u32 __flr_pad;
88 /* Options in format of IPV6_PKTOPTIONS */
89};
90
91#define IPV6_FL_A_GET 0
92#define IPV6_FL_A_PUT 1
93#define IPV6_FL_A_RENEW 2
94
95#define IPV6_FL_F_CREATE 1
96#define IPV6_FL_F_EXCL 2
97
98#define IPV6_FL_S_NONE 0
99#define IPV6_FL_S_EXCL 1
100#define IPV6_FL_S_PROCESS 2
101#define IPV6_FL_S_USER 3
102#define IPV6_FL_S_ANY 255
103
104
105/*
106 * Bitmask constant declarations to help applications select out the
107 * flow label and priority fields.
108 *
109 * Note that this are in host byte order while the flowinfo field of
110 * sockaddr_in6 is in network byte order.
111 */
112
113#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
114#define IPV6_FLOWINFO_PRIORITY 0x0ff00000
115
116/* These defintions are obsolete */
117#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
118#define IPV6_PRIORITY_FILLER 0x0100
119#define IPV6_PRIORITY_UNATTENDED 0x0200
120#define IPV6_PRIORITY_RESERVED1 0x0300
121#define IPV6_PRIORITY_BULK 0x0400
122#define IPV6_PRIORITY_RESERVED2 0x0500
123#define IPV6_PRIORITY_INTERACTIVE 0x0600
124#define IPV6_PRIORITY_CONTROL 0x0700
125#define IPV6_PRIORITY_8 0x0800
126#define IPV6_PRIORITY_9 0x0900
127#define IPV6_PRIORITY_10 0x0a00
128#define IPV6_PRIORITY_11 0x0b00
129#define IPV6_PRIORITY_12 0x0c00
130#define IPV6_PRIORITY_13 0x0d00
131#define IPV6_PRIORITY_14 0x0e00
132#define IPV6_PRIORITY_15 0x0f00
133
134/*
135 * IPV6 extension headers
136 */
137#define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
138#define IPPROTO_ROUTING 43 /* IPv6 routing header */
139#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
140#define IPPROTO_ICMPV6 58 /* ICMPv6 */
141#define IPPROTO_NONE 59 /* IPv6 no next header */
142#define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
143#define IPPROTO_MH 135 /* IPv6 mobility header */
144
145/*
146 * IPv6 TLV options.
147 */
148#define IPV6_TLV_PAD0 0
149#define IPV6_TLV_PADN 1
150#define IPV6_TLV_ROUTERALERT 5
151#define IPV6_TLV_JUMBO 194
152#define IPV6_TLV_HAO 201 /* home address option */
153
154/*
155 * IPV6 socket options
156 */
157
158#define IPV6_ADDRFORM 1
159#define IPV6_2292PKTINFO 2
160#define IPV6_2292HOPOPTS 3
161#define IPV6_2292DSTOPTS 4
162#define IPV6_2292RTHDR 5
163#define IPV6_2292PKTOPTIONS 6
164#define IPV6_CHECKSUM 7
165#define IPV6_2292HOPLIMIT 8
166#define IPV6_NEXTHOP 9
167#define IPV6_AUTHHDR 10 /* obsolete */
168#define IPV6_FLOWINFO 11
169
170#define IPV6_UNICAST_HOPS 16
171#define IPV6_MULTICAST_IF 17
172#define IPV6_MULTICAST_HOPS 18
173#define IPV6_MULTICAST_LOOP 19
174#define IPV6_ADD_MEMBERSHIP 20
175#define IPV6_DROP_MEMBERSHIP 21
176#define IPV6_ROUTER_ALERT 22
177#define IPV6_MTU_DISCOVER 23
178#define IPV6_MTU 24
179#define IPV6_RECVERR 25
180#define IPV6_V6ONLY 26
181#define IPV6_JOIN_ANYCAST 27
182#define IPV6_LEAVE_ANYCAST 28
183
184/* IPV6_MTU_DISCOVER values */
185#define IPV6_PMTUDISC_DONT 0
186#define IPV6_PMTUDISC_WANT 1
187#define IPV6_PMTUDISC_DO 2
188#define IPV6_PMTUDISC_PROBE 3
189
190/* Flowlabel */
191#define IPV6_FLOWLABEL_MGR 32
192#define IPV6_FLOWINFO_SEND 33
193
194#define IPV6_IPSEC_POLICY 34
195#define IPV6_XFRM_POLICY 35
196
197/*
198 * Multicast:
199 * Following socket options are shared between IPv4 and IPv6.
200 *
201 * MCAST_JOIN_GROUP 42
202 * MCAST_BLOCK_SOURCE 43
203 * MCAST_UNBLOCK_SOURCE 44
204 * MCAST_LEAVE_GROUP 45
205 * MCAST_JOIN_SOURCE_GROUP 46
206 * MCAST_LEAVE_SOURCE_GROUP 47
207 * MCAST_MSFILTER 48
208 */
209
210/*
211 * Advanced API (RFC3542) (1)
212 *
213 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
214 */
215
216#define IPV6_RECVPKTINFO 49
217#define IPV6_PKTINFO 50
218#define IPV6_RECVHOPLIMIT 51
219#define IPV6_HOPLIMIT 52
220#define IPV6_RECVHOPOPTS 53
221#define IPV6_HOPOPTS 54
222#define IPV6_RTHDRDSTOPTS 55
223#define IPV6_RECVRTHDR 56
224#define IPV6_RTHDR 57
225#define IPV6_RECVDSTOPTS 58
226#define IPV6_DSTOPTS 59
227#if 0 /* not yet */
228#define IPV6_RECVPATHMTU 60
229#define IPV6_PATHMTU 61
230#define IPV6_DONTFRAG 62
231#define IPV6_USE_MIN_MTU 63
232#endif
233
234/*
235 * Netfilter (1)
236 *
237 * Following socket options are used in ip6_tables;
238 * see include/linux/netfilter_ipv6/ip6_tables.h.
239 *
240 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
241 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
242 */
243
244/*
245 * Advanced API (RFC3542) (2)
246 */
247#define IPV6_RECVTCLASS 66
248#define IPV6_TCLASS 67
249
250/*
251 * Netfilter (2)
252 *
253 * Following socket options are used in ip6_tables;
254 * see include/linux/netfilter_ipv6/ip6_tables.h.
255 *
256 * IP6T_SO_GET_REVISION_MATCH 68
257 * IP6T_SO_GET_REVISION_TARGET 69
258 */
259
260/* RFC5014: Source address selection */
261#define IPV6_ADDR_PREFERENCES 72
262
263#define IPV6_PREFER_SRC_TMP 0x0001
264#define IPV6_PREFER_SRC_PUBLIC 0x0002
265#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
266#define IPV6_PREFER_SRC_COA 0x0004
267#define IPV6_PREFER_SRC_HOME 0x0400
268#define IPV6_PREFER_SRC_CGA 0x0008
269#define IPV6_PREFER_SRC_NONCGA 0x0800
270
271/*
272 * Multicast Routing:
273 * see include/linux/mroute6.h.
274 *
275 * MRT6_INIT 200
276 * MRT6_DONE 201
277 * MRT6_ADD_MIF 202
278 * MRT6_DEL_MIF 203
279 * MRT6_ADD_MFC 204
280 * MRT6_DEL_MFC 205
281 * MRT6_VERSION 206
282 * MRT6_ASSERT 207
283 * MRT6_PIM 208
284 * (reserved) 209
285 */
286#endif