1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3 * Types and definitions for AF_INET6
4 * Linux INET6 implementation
5 *
6 * Authors:
7 * Pedro Roque <roque@di.fc.ul.pt>
8 *
9 * Sources:
10 * IPv6 Program Interfaces for BSD Systems
11 * <draft-ietf-ipngwg-bsd-api-05.txt>
12 *
13 * Advanced Sockets API for IPv6
14 * <draft-stevens-advanced-api-00.txt>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version
19 * 2 of the License, or (at your option) any later version.
20 */
21
22 #ifndef _UAPI_LINUX_IN6_H
23 #define _UAPI_LINUX_IN6_H
24
25 #include <linux/types.h>
26 #include <linux/libc-compat.h>
27
28 /*
29 * IPv6 address structure
30 */
31
32 #if __UAPI_DEF_IN6_ADDR
33 struct in6_addr {
34 union {
35 __u8 u6_addr8[16];
36 #if __UAPI_DEF_IN6_ADDR_ALT
37 __be16 u6_addr16[8];
38 __be32 u6_addr32[4];
39 #endif
40 } in6_u;
41 #define s6_addr in6_u.u6_addr8
42 #if __UAPI_DEF_IN6_ADDR_ALT
43 #define s6_addr16 in6_u.u6_addr16
44 #define s6_addr32 in6_u.u6_addr32
45 #endif
46 };
47 #endif /* __UAPI_DEF_IN6_ADDR */
48
49 #if __UAPI_DEF_SOCKADDR_IN6
50 struct sockaddr_in6 {
51 unsigned short int sin6_family; /* AF_INET6 */
52 __be16 sin6_port; /* Transport layer port # */
53 __be32 sin6_flowinfo; /* IPv6 flow information */
54 struct in6_addr sin6_addr; /* IPv6 address */
55 __u32 sin6_scope_id; /* scope id (new in RFC2553) */
56 };
57 #endif /* __UAPI_DEF_SOCKADDR_IN6 */
58
59 #if __UAPI_DEF_IPV6_MREQ
60 struct ipv6_mreq {
61 /* IPv6 multicast address of group */
62 struct in6_addr ipv6mr_multiaddr;
63
64 /* local IPv6 address of interface */
65 int ipv6mr_ifindex;
66 };
67 #endif /* __UAPI_DEF_IVP6_MREQ */
68
69 #define ipv6mr_acaddr ipv6mr_multiaddr
70
71 struct in6_flowlabel_req {
72 struct in6_addr flr_dst;
73 __be32 flr_label;
74 __u8 flr_action;
75 __u8 flr_share;
76 __u16 flr_flags;
77 __u16 flr_expires;
78 __u16 flr_linger;
79 __u32 __flr_pad;
80 /* Options in format of IPV6_PKTOPTIONS */
81 };
82
83 #define IPV6_FL_A_GET 0
84 #define IPV6_FL_A_PUT 1
85 #define IPV6_FL_A_RENEW 2
86
87 #define IPV6_FL_F_CREATE 1
88 #define IPV6_FL_F_EXCL 2
89 #define IPV6_FL_F_REFLECT 4
90 #define IPV6_FL_F_REMOTE 8
91
92 #define IPV6_FL_S_NONE 0
93 #define IPV6_FL_S_EXCL 1
94 #define IPV6_FL_S_PROCESS 2
95 #define IPV6_FL_S_USER 3
96 #define IPV6_FL_S_ANY 255
97
98
99 /*
100 * Bitmask constant declarations to help applications select out the
101 * flow label and priority fields.
102 *
103 * Note that this are in host byte order while the flowinfo field of
104 * sockaddr_in6 is in network byte order.
105 */
106
107 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
108 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000
109
110 /* These definitions are obsolete */
111 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
112 #define IPV6_PRIORITY_FILLER 0x0100
113 #define IPV6_PRIORITY_UNATTENDED 0x0200
114 #define IPV6_PRIORITY_RESERVED1 0x0300
115 #define IPV6_PRIORITY_BULK 0x0400
116 #define IPV6_PRIORITY_RESERVED2 0x0500
117 #define IPV6_PRIORITY_INTERACTIVE 0x0600
118 #define IPV6_PRIORITY_CONTROL 0x0700
119 #define IPV6_PRIORITY_8 0x0800
120 #define IPV6_PRIORITY_9 0x0900
121 #define IPV6_PRIORITY_10 0x0a00
122 #define IPV6_PRIORITY_11 0x0b00
123 #define IPV6_PRIORITY_12 0x0c00
124 #define IPV6_PRIORITY_13 0x0d00
125 #define IPV6_PRIORITY_14 0x0e00
126 #define IPV6_PRIORITY_15 0x0f00
127
128 /*
129 * IPV6 extension headers
130 */
131 #if __UAPI_DEF_IPPROTO_V6
132 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
133 #define IPPROTO_ROUTING 43 /* IPv6 routing header */
134 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
135 #define IPPROTO_ICMPV6 58 /* ICMPv6 */
136 #define IPPROTO_NONE 59 /* IPv6 no next header */
137 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
138 #define IPPROTO_MH 135 /* IPv6 mobility header */
139 #endif /* __UAPI_DEF_IPPROTO_V6 */
140
141 /*
142 * IPv6 TLV options.
143 */
144 #define IPV6_TLV_PAD1 0
145 #define IPV6_TLV_PADN 1
146 #define IPV6_TLV_ROUTERALERT 5
147 #define IPV6_TLV_CALIPSO 7 /* RFC 5570 */
148 #define IPV6_TLV_IOAM 49 /* RFC 9486 */
149 #define IPV6_TLV_JUMBO 194
150 #define IPV6_TLV_HAO 201 /* home address option */
151
152 /*
153 * IPV6 socket options
154 */
155 #if __UAPI_DEF_IPV6_OPTIONS
156 #define IPV6_ADDRFORM 1
157 #define IPV6_2292PKTINFO 2
158 #define IPV6_2292HOPOPTS 3
159 #define IPV6_2292DSTOPTS 4
160 #define IPV6_2292RTHDR 5
161 #define IPV6_2292PKTOPTIONS 6
162 #define IPV6_CHECKSUM 7
163 #define IPV6_2292HOPLIMIT 8
164 #define IPV6_NEXTHOP 9
165 #define IPV6_AUTHHDR 10 /* obsolete */
166 #define IPV6_FLOWINFO 11
167
168 #define IPV6_UNICAST_HOPS 16
169 #define IPV6_MULTICAST_IF 17
170 #define IPV6_MULTICAST_HOPS 18
171 #define IPV6_MULTICAST_LOOP 19
172 #define IPV6_ADD_MEMBERSHIP 20
173 #define IPV6_DROP_MEMBERSHIP 21
174 #define IPV6_ROUTER_ALERT 22
175 #define IPV6_MTU_DISCOVER 23
176 #define IPV6_MTU 24
177 #define IPV6_RECVERR 25
178 #define IPV6_V6ONLY 26
179 #define IPV6_JOIN_ANYCAST 27
180 #define IPV6_LEAVE_ANYCAST 28
181 #define IPV6_MULTICAST_ALL 29
182 #define IPV6_ROUTER_ALERT_ISOLATE 30
183 #define IPV6_RECVERR_RFC4884 31
184
185 /* IPV6_MTU_DISCOVER values */
186 #define IPV6_PMTUDISC_DONT 0
187 #define IPV6_PMTUDISC_WANT 1
188 #define IPV6_PMTUDISC_DO 2
189 #define IPV6_PMTUDISC_PROBE 3
190 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4
191 * also see comments on IP_PMTUDISC_INTERFACE
192 */
193 #define IPV6_PMTUDISC_INTERFACE 4
194 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
195 * get fragmented if they exceed the interface mtu
196 */
197 #define IPV6_PMTUDISC_OMIT 5
198
199 /* Flowlabel */
200 #define IPV6_FLOWLABEL_MGR 32
201 #define IPV6_FLOWINFO_SEND 33
202
203 #define IPV6_IPSEC_POLICY 34
204 #define IPV6_XFRM_POLICY 35
205 #define IPV6_HDRINCL 36
206 #endif
207
208 /*
209 * Multicast:
210 * Following socket options are shared between IPv4 and IPv6.
211 *
212 * MCAST_JOIN_GROUP 42
213 * MCAST_BLOCK_SOURCE 43
214 * MCAST_UNBLOCK_SOURCE 44
215 * MCAST_LEAVE_GROUP 45
216 * MCAST_JOIN_SOURCE_GROUP 46
217 * MCAST_LEAVE_SOURCE_GROUP 47
218 * MCAST_MSFILTER 48
219 */
220
221 /*
222 * Advanced API (RFC3542) (1)
223 *
224 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
225 */
226
227 #define IPV6_RECVPKTINFO 49
228 #define IPV6_PKTINFO 50
229 #define IPV6_RECVHOPLIMIT 51
230 #define IPV6_HOPLIMIT 52
231 #define IPV6_RECVHOPOPTS 53
232 #define IPV6_HOPOPTS 54
233 #define IPV6_RTHDRDSTOPTS 55
234 #define IPV6_RECVRTHDR 56
235 #define IPV6_RTHDR 57
236 #define IPV6_RECVDSTOPTS 58
237 #define IPV6_DSTOPTS 59
238 #define IPV6_RECVPATHMTU 60
239 #define IPV6_PATHMTU 61
240 #define IPV6_DONTFRAG 62
241 #if 0 /* not yet */
242 #define IPV6_USE_MIN_MTU 63
243 #endif
244
245 /*
246 * Netfilter (1)
247 *
248 * Following socket options are used in ip6_tables;
249 * see include/linux/netfilter_ipv6/ip6_tables.h.
250 *
251 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
252 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
253 */
254
255 /*
256 * Advanced API (RFC3542) (2)
257 */
258 #define IPV6_RECVTCLASS 66
259 #define IPV6_TCLASS 67
260
261 /*
262 * Netfilter (2)
263 *
264 * Following socket options are used in ip6_tables;
265 * see include/linux/netfilter_ipv6/ip6_tables.h.
266 *
267 * IP6T_SO_GET_REVISION_MATCH 68
268 * IP6T_SO_GET_REVISION_TARGET 69
269 * IP6T_SO_ORIGINAL_DST 80
270 */
271
272 #define IPV6_AUTOFLOWLABEL 70
273 /* RFC5014: Source address selection */
274 #define IPV6_ADDR_PREFERENCES 72
275
276 #define IPV6_PREFER_SRC_TMP 0x0001
277 #define IPV6_PREFER_SRC_PUBLIC 0x0002
278 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
279 #define IPV6_PREFER_SRC_COA 0x0004
280 #define IPV6_PREFER_SRC_HOME 0x0400
281 #define IPV6_PREFER_SRC_CGA 0x0008
282 #define IPV6_PREFER_SRC_NONCGA 0x0800
283
284 /* RFC5082: Generalized Ttl Security Mechanism */
285 #define IPV6_MINHOPCOUNT 73
286
287 #define IPV6_ORIGDSTADDR 74
288 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
289 #define IPV6_TRANSPARENT 75
290 #define IPV6_UNICAST_IF 76
291 #define IPV6_RECVFRAGSIZE 77
292 #define IPV6_FREEBIND 78
293
294 /*
295 * Multicast Routing:
296 * see include/uapi/linux/mroute6.h.
297 *
298 * MRT6_BASE 200
299 * ...
300 * MRT6_MAX
301 */
302 #endif /* _UAPI_LINUX_IN6_H */
303
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