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 | |