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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 _UAPI_LINUX_IN6_H
22 #define _UAPI_LINUX_IN6_H
23
24 #include <linux/types.h>
25 #include <linux/libc-compat.h>
26
27 /*
28 * IPv6 address structure
29 */
30
31 #if __UAPI_DEF_IN6_ADDR
32 struct in6_addr {
33 union {
34 __u8 u6_addr8[16];
35 #if __UAPI_DEF_IN6_ADDR_ALT
36 __be16 u6_addr16[8];
37 __be32 u6_addr32[4];
38 #endif
39 } in6_u;
40 #define s6_addr in6_u.u6_addr8
41 #if __UAPI_DEF_IN6_ADDR_ALT
42 #define s6_addr16 in6_u.u6_addr16
43 #define s6_addr32 in6_u.u6_addr32
44 #endif
45 };
46 #endif /* __UAPI_DEF_IN6_ADDR */
47
48 #if __UAPI_DEF_SOCKADDR_IN6
49 struct sockaddr_in6 {
50 unsigned short int sin6_family; /* AF_INET6 */
51 __be16 sin6_port; /* Transport layer port # */
52 __be32 sin6_flowinfo; /* IPv6 flow information */
53 struct in6_addr sin6_addr; /* IPv6 address */
54 __u32 sin6_scope_id; /* scope id (new in RFC2553) */
55 };
56 #endif /* __UAPI_DEF_SOCKADDR_IN6 */
57
58 #if __UAPI_DEF_IPV6_MREQ
59 struct ipv6_mreq {
60 /* IPv6 multicast address of group */
61 struct in6_addr ipv6mr_multiaddr;
62
63 /* local IPv6 address of interface */
64 int ipv6mr_ifindex;
65 };
66 #endif /* __UAPI_DEF_IVP6_MREQ */
67
68 #define ipv6mr_acaddr ipv6mr_multiaddr
69
70 struct in6_flowlabel_req {
71 struct in6_addr flr_dst;
72 __be32 flr_label;
73 __u8 flr_action;
74 __u8 flr_share;
75 __u16 flr_flags;
76 __u16 flr_expires;
77 __u16 flr_linger;
78 __u32 __flr_pad;
79 /* Options in format of IPV6_PKTOPTIONS */
80 };
81
82 #define IPV6_FL_A_GET 0
83 #define IPV6_FL_A_PUT 1
84 #define IPV6_FL_A_RENEW 2
85
86 #define IPV6_FL_F_CREATE 1
87 #define IPV6_FL_F_EXCL 2
88 #define IPV6_FL_F_REFLECT 4
89 #define IPV6_FL_F_REMOTE 8
90
91 #define IPV6_FL_S_NONE 0
92 #define IPV6_FL_S_EXCL 1
93 #define IPV6_FL_S_PROCESS 2
94 #define IPV6_FL_S_USER 3
95 #define IPV6_FL_S_ANY 255
96
97
98 /*
99 * Bitmask constant declarations to help applications select out the
100 * flow label and priority fields.
101 *
102 * Note that this are in host byte order while the flowinfo field of
103 * sockaddr_in6 is in network byte order.
104 */
105
106 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
107 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000
108
109 /* These definitions are obsolete */
110 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
111 #define IPV6_PRIORITY_FILLER 0x0100
112 #define IPV6_PRIORITY_UNATTENDED 0x0200
113 #define IPV6_PRIORITY_RESERVED1 0x0300
114 #define IPV6_PRIORITY_BULK 0x0400
115 #define IPV6_PRIORITY_RESERVED2 0x0500
116 #define IPV6_PRIORITY_INTERACTIVE 0x0600
117 #define IPV6_PRIORITY_CONTROL 0x0700
118 #define IPV6_PRIORITY_8 0x0800
119 #define IPV6_PRIORITY_9 0x0900
120 #define IPV6_PRIORITY_10 0x0a00
121 #define IPV6_PRIORITY_11 0x0b00
122 #define IPV6_PRIORITY_12 0x0c00
123 #define IPV6_PRIORITY_13 0x0d00
124 #define IPV6_PRIORITY_14 0x0e00
125 #define IPV6_PRIORITY_15 0x0f00
126
127 /*
128 * IPV6 extension headers
129 */
130 #if __UAPI_DEF_IPPROTO_V6
131 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
132 #define IPPROTO_ROUTING 43 /* IPv6 routing header */
133 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
134 #define IPPROTO_ICMPV6 58 /* ICMPv6 */
135 #define IPPROTO_NONE 59 /* IPv6 no next header */
136 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
137 #define IPPROTO_MH 135 /* IPv6 mobility header */
138 #endif /* __UAPI_DEF_IPPROTO_V6 */
139
140 /*
141 * IPv6 TLV options.
142 */
143 #define IPV6_TLV_PAD1 0
144 #define IPV6_TLV_PADN 1
145 #define IPV6_TLV_ROUTERALERT 5
146 #define IPV6_TLV_CALIPSO 7 /* RFC 5570 */
147 #define IPV6_TLV_JUMBO 194
148 #define IPV6_TLV_HAO 201 /* home address option */
149
150 /*
151 * IPV6 socket options
152 */
153 #if __UAPI_DEF_IPV6_OPTIONS
154 #define IPV6_ADDRFORM 1
155 #define IPV6_2292PKTINFO 2
156 #define IPV6_2292HOPOPTS 3
157 #define IPV6_2292DSTOPTS 4
158 #define IPV6_2292RTHDR 5
159 #define IPV6_2292PKTOPTIONS 6
160 #define IPV6_CHECKSUM 7
161 #define IPV6_2292HOPLIMIT 8
162 #define IPV6_NEXTHOP 9
163 #define IPV6_AUTHHDR 10 /* obsolete */
164 #define IPV6_FLOWINFO 11
165
166 #define IPV6_UNICAST_HOPS 16
167 #define IPV6_MULTICAST_IF 17
168 #define IPV6_MULTICAST_HOPS 18
169 #define IPV6_MULTICAST_LOOP 19
170 #define IPV6_ADD_MEMBERSHIP 20
171 #define IPV6_DROP_MEMBERSHIP 21
172 #define IPV6_ROUTER_ALERT 22
173 #define IPV6_MTU_DISCOVER 23
174 #define IPV6_MTU 24
175 #define IPV6_RECVERR 25
176 #define IPV6_V6ONLY 26
177 #define IPV6_JOIN_ANYCAST 27
178 #define IPV6_LEAVE_ANYCAST 28
179
180 /* IPV6_MTU_DISCOVER values */
181 #define IPV6_PMTUDISC_DONT 0
182 #define IPV6_PMTUDISC_WANT 1
183 #define IPV6_PMTUDISC_DO 2
184 #define IPV6_PMTUDISC_PROBE 3
185 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4
186 * also see comments on IP_PMTUDISC_INTERFACE
187 */
188 #define IPV6_PMTUDISC_INTERFACE 4
189 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
190 * get fragmented if they exceed the interface mtu
191 */
192 #define IPV6_PMTUDISC_OMIT 5
193
194 /* Flowlabel */
195 #define IPV6_FLOWLABEL_MGR 32
196 #define IPV6_FLOWINFO_SEND 33
197
198 #define IPV6_IPSEC_POLICY 34
199 #define IPV6_XFRM_POLICY 35
200 #define IPV6_HDRINCL 36
201 #endif
202
203 /*
204 * Multicast:
205 * Following socket options are shared between IPv4 and IPv6.
206 *
207 * MCAST_JOIN_GROUP 42
208 * MCAST_BLOCK_SOURCE 43
209 * MCAST_UNBLOCK_SOURCE 44
210 * MCAST_LEAVE_GROUP 45
211 * MCAST_JOIN_SOURCE_GROUP 46
212 * MCAST_LEAVE_SOURCE_GROUP 47
213 * MCAST_MSFILTER 48
214 */
215
216 /*
217 * Advanced API (RFC3542) (1)
218 *
219 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
220 */
221
222 #define IPV6_RECVPKTINFO 49
223 #define IPV6_PKTINFO 50
224 #define IPV6_RECVHOPLIMIT 51
225 #define IPV6_HOPLIMIT 52
226 #define IPV6_RECVHOPOPTS 53
227 #define IPV6_HOPOPTS 54
228 #define IPV6_RTHDRDSTOPTS 55
229 #define IPV6_RECVRTHDR 56
230 #define IPV6_RTHDR 57
231 #define IPV6_RECVDSTOPTS 58
232 #define IPV6_DSTOPTS 59
233 #define IPV6_RECVPATHMTU 60
234 #define IPV6_PATHMTU 61
235 #define IPV6_DONTFRAG 62
236 #if 0 /* not yet */
237 #define IPV6_USE_MIN_MTU 63
238 #endif
239
240 /*
241 * Netfilter (1)
242 *
243 * Following socket options are used in ip6_tables;
244 * see include/linux/netfilter_ipv6/ip6_tables.h.
245 *
246 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
247 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
248 */
249
250 /*
251 * Advanced API (RFC3542) (2)
252 */
253 #define IPV6_RECVTCLASS 66
254 #define IPV6_TCLASS 67
255
256 /*
257 * Netfilter (2)
258 *
259 * Following socket options are used in ip6_tables;
260 * see include/linux/netfilter_ipv6/ip6_tables.h.
261 *
262 * IP6T_SO_GET_REVISION_MATCH 68
263 * IP6T_SO_GET_REVISION_TARGET 69
264 * IP6T_SO_ORIGINAL_DST 80
265 */
266
267 #define IPV6_AUTOFLOWLABEL 70
268 /* RFC5014: Source address selection */
269 #define IPV6_ADDR_PREFERENCES 72
270
271 #define IPV6_PREFER_SRC_TMP 0x0001
272 #define IPV6_PREFER_SRC_PUBLIC 0x0002
273 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
274 #define IPV6_PREFER_SRC_COA 0x0004
275 #define IPV6_PREFER_SRC_HOME 0x0400
276 #define IPV6_PREFER_SRC_CGA 0x0008
277 #define IPV6_PREFER_SRC_NONCGA 0x0800
278
279 /* RFC5082: Generalized Ttl Security Mechanism */
280 #define IPV6_MINHOPCOUNT 73
281
282 #define IPV6_ORIGDSTADDR 74
283 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
284 #define IPV6_TRANSPARENT 75
285 #define IPV6_UNICAST_IF 76
286
287 /*
288 * Multicast Routing:
289 * see include/uapi/linux/mroute6.h.
290 *
291 * MRT6_BASE 200
292 * ...
293 * MRT6_MAX
294 */
295 #endif /* _UAPI_LINUX_IN6_H */