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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080030struct in6_addr {
31 union {
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 __u8 u6_addr8[16];
Al Viro48818f82006-09-27 18:44:54 -070033 __be16 u6_addr16[8];
34 __be32 u6_addr32[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 } in6_u;
36#define s6_addr in6_u.u6_addr8
37#define s6_addr16 in6_u.u6_addr16
38#define s6_addr32 in6_u.u6_addr32
39};
40
41/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
42 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
43 * in network byte order, not in host byte order as are the IPv4 equivalents
44 */
Jaswinder Singh Rajput25d00fd2009-02-02 21:40:58 +053045#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -070046extern const struct in6_addr in6addr_any;
47#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
Linus Torvalds1da177e2005-04-16 15:20:36 -070048extern const struct in6_addr in6addr_loopback;
49#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +090050extern const struct in6_addr in6addr_linklocal_allnodes;
51#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
52 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
53extern const struct in6_addr in6addr_linklocal_allrouters;
54#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
55 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } }
56#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58struct sockaddr_in6 {
59 unsigned short int sin6_family; /* AF_INET6 */
Al Viroe2e38e82006-09-27 18:45:27 -070060 __be16 sin6_port; /* Transport layer port # */
Al Viro90bcaf72006-11-08 00:25:17 -080061 __be32 sin6_flowinfo; /* IPv6 flow information */
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 struct in6_addr sin6_addr; /* IPv6 address */
63 __u32 sin6_scope_id; /* scope id (new in RFC2553) */
64};
65
66struct ipv6_mreq {
67 /* IPv6 multicast address of group */
68 struct in6_addr ipv6mr_multiaddr;
69
70 /* local IPv6 address of interface */
71 int ipv6mr_ifindex;
72};
73
74#define ipv6mr_acaddr ipv6mr_multiaddr
75
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080076struct in6_flowlabel_req {
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 struct in6_addr flr_dst;
Al Viro90bcaf72006-11-08 00:25:17 -080078 __be32 flr_label;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 __u8 flr_action;
80 __u8 flr_share;
81 __u16 flr_flags;
82 __u16 flr_expires;
83 __u16 flr_linger;
84 __u32 __flr_pad;
85 /* Options in format of IPV6_PKTOPTIONS */
86};
87
88#define IPV6_FL_A_GET 0
89#define IPV6_FL_A_PUT 1
90#define IPV6_FL_A_RENEW 2
91
92#define IPV6_FL_F_CREATE 1
93#define IPV6_FL_F_EXCL 2
94
95#define IPV6_FL_S_NONE 0
96#define IPV6_FL_S_EXCL 1
97#define IPV6_FL_S_PROCESS 2
98#define IPV6_FL_S_USER 3
99#define IPV6_FL_S_ANY 255
100
101
102/*
103 * Bitmask constant declarations to help applications select out the
104 * flow label and priority fields.
105 *
106 * Note that this are in host byte order while the flowinfo field of
107 * sockaddr_in6 is in network byte order.
108 */
109
110#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
111#define IPV6_FLOWINFO_PRIORITY 0x0ff00000
112
Adam Buchbinder6070d812009-12-04 15:47:01 -0500113/* These definitions are obsolete */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
115#define IPV6_PRIORITY_FILLER 0x0100
116#define IPV6_PRIORITY_UNATTENDED 0x0200
117#define IPV6_PRIORITY_RESERVED1 0x0300
118#define IPV6_PRIORITY_BULK 0x0400
119#define IPV6_PRIORITY_RESERVED2 0x0500
120#define IPV6_PRIORITY_INTERACTIVE 0x0600
121#define IPV6_PRIORITY_CONTROL 0x0700
122#define IPV6_PRIORITY_8 0x0800
123#define IPV6_PRIORITY_9 0x0900
124#define IPV6_PRIORITY_10 0x0a00
125#define IPV6_PRIORITY_11 0x0b00
126#define IPV6_PRIORITY_12 0x0c00
127#define IPV6_PRIORITY_13 0x0d00
128#define IPV6_PRIORITY_14 0x0e00
129#define IPV6_PRIORITY_15 0x0f00
130
131/*
132 * IPV6 extension headers
133 */
134#define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
135#define IPPROTO_ROUTING 43 /* IPv6 routing header */
136#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
137#define IPPROTO_ICMPV6 58 /* ICMPv6 */
138#define IPPROTO_NONE 59 /* IPv6 no next header */
139#define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
Masahide NAKAMURA2b741652006-08-23 20:34:26 -0700140#define IPPROTO_MH 135 /* IPv6 mobility header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142/*
143 * IPv6 TLV options.
144 */
145#define IPV6_TLV_PAD0 0
146#define IPV6_TLV_PADN 1
147#define IPV6_TLV_ROUTERALERT 5
148#define IPV6_TLV_JUMBO 194
Noriaki TAKAMIYA842426e2006-08-23 19:21:34 -0700149#define IPV6_TLV_HAO 201 /* home address option */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151/*
152 * IPV6 socket options
153 */
154
155#define IPV6_ADDRFORM 1
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900156#define IPV6_2292PKTINFO 2
157#define IPV6_2292HOPOPTS 3
158#define IPV6_2292DSTOPTS 4
159#define IPV6_2292RTHDR 5
160#define IPV6_2292PKTOPTIONS 6
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#define IPV6_CHECKSUM 7
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900162#define IPV6_2292HOPLIMIT 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163#define IPV6_NEXTHOP 9
YOSHIFUJI Hideaki7fe40f72005-06-28 15:46:24 -0700164#define IPV6_AUTHHDR 10 /* obsolete */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165#define IPV6_FLOWINFO 11
166
167#define IPV6_UNICAST_HOPS 16
168#define IPV6_MULTICAST_IF 17
169#define IPV6_MULTICAST_HOPS 18
170#define IPV6_MULTICAST_LOOP 19
171#define IPV6_ADD_MEMBERSHIP 20
172#define IPV6_DROP_MEMBERSHIP 21
173#define IPV6_ROUTER_ALERT 22
174#define IPV6_MTU_DISCOVER 23
175#define IPV6_MTU 24
176#define IPV6_RECVERR 25
177#define IPV6_V6ONLY 26
178#define IPV6_JOIN_ANYCAST 27
179#define IPV6_LEAVE_ANYCAST 28
180
181/* IPV6_MTU_DISCOVER values */
182#define IPV6_PMTUDISC_DONT 0
183#define IPV6_PMTUDISC_WANT 1
184#define IPV6_PMTUDISC_DO 2
John Heffner628a5c52007-04-20 15:53:27 -0700185#define IPV6_PMTUDISC_PROBE 3
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187/* Flowlabel */
188#define IPV6_FLOWLABEL_MGR 32
189#define IPV6_FLOWINFO_SEND 33
190
191#define IPV6_IPSEC_POLICY 34
192#define IPV6_XFRM_POLICY 35
193
194/*
195 * Multicast:
196 * Following socket options are shared between IPv4 and IPv6.
197 *
198 * MCAST_JOIN_GROUP 42
199 * MCAST_BLOCK_SOURCE 43
200 * MCAST_UNBLOCK_SOURCE 44
201 * MCAST_LEAVE_GROUP 45
202 * MCAST_JOIN_SOURCE_GROUP 46
203 * MCAST_LEAVE_SOURCE_GROUP 47
204 * MCAST_MSFILTER 48
205 */
206
YOSHIFUJI Hideaki99288902005-09-10 11:26:34 +0900207/*
208 * Advanced API (RFC3542) (1)
209 *
210 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
211 */
212
213#define IPV6_RECVPKTINFO 49
214#define IPV6_PKTINFO 50
215#define IPV6_RECVHOPLIMIT 51
216#define IPV6_HOPLIMIT 52
217#define IPV6_RECVHOPOPTS 53
218#define IPV6_HOPOPTS 54
219#define IPV6_RTHDRDSTOPTS 55
220#define IPV6_RECVRTHDR 56
221#define IPV6_RTHDR 57
222#define IPV6_RECVDSTOPTS 58
223#define IPV6_DSTOPTS 59
YOSHIFUJI Hideaki99288902005-09-10 11:26:34 +0900224#define IPV6_RECVPATHMTU 60
225#define IPV6_PATHMTU 61
226#define IPV6_DONTFRAG 62
Brian Haley793b1472010-04-23 11:26:07 +0000227#if 0 /* not yet */
YOSHIFUJI Hideaki99288902005-09-10 11:26:34 +0900228#define IPV6_USE_MIN_MTU 63
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900229#endif
YOSHIFUJI Hideakidd274662005-09-10 11:32:45 +0900230
231/*
Yasuyuki Kozakaib96e7ec2006-11-14 19:48:48 -0800232 * Netfilter (1)
YOSHIFUJI Hideakidd274662005-09-10 11:32:45 +0900233 *
234 * Following socket options are used in ip6_tables;
235 * see include/linux/netfilter_ipv6/ip6_tables.h.
236 *
237 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
238 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
239 */
240
241/*
242 * Advanced API (RFC3542) (2)
243 */
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900244#define IPV6_RECVTCLASS 66
245#define IPV6_TCLASS 67
YOSHIFUJI Hideaki333fad52005-09-08 09:59:17 +0900246
Yasuyuki Kozakaib96e7ec2006-11-14 19:48:48 -0800247/*
248 * Netfilter (2)
249 *
250 * Following socket options are used in ip6_tables;
251 * see include/linux/netfilter_ipv6/ip6_tables.h.
252 *
253 * IP6T_SO_GET_REVISION_MATCH 68
254 * IP6T_SO_GET_REVISION_TARGET 69
255 */
256
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +0900257/* RFC5014: Source address selection */
258#define IPV6_ADDR_PREFERENCES 72
259
260#define IPV6_PREFER_SRC_TMP 0x0001
261#define IPV6_PREFER_SRC_PUBLIC 0x0002
262#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
263#define IPV6_PREFER_SRC_COA 0x0004
264#define IPV6_PREFER_SRC_HOME 0x0400
265#define IPV6_PREFER_SRC_CGA 0x0008
266#define IPV6_PREFER_SRC_NONCGA 0x0800
267
Stephen Hemmingere802af92010-04-22 15:24:53 -0700268/* RFC5082: Generalized Ttl Security Mechanism */
269#define IPV6_MINHOPCOUNT 73
270
YOSHIFUJI Hideaki12802d02008-04-03 09:22:56 +0900271/*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286#endif