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47505b8b | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* SCTP kernel reference Implementation |
3 | * (C) Copyright IBM Corp. 2001, 2004 | |
4 | * Copyright (c) 1999-2000 Cisco, Inc. | |
5 | * Copyright (c) 1999-2001 Motorola, Inc. | |
6 | * Copyright (c) 2001 Intel Corp. | |
7 | * Copyright (c) 2001 Nokia, Inc. | |
8 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
9 | * | |
10 | * This file is part of the SCTP kernel reference Implementation | |
11 | * | |
12 | * Various protocol defined structures. | |
13 | * | |
1da177e4 LT |
14 | * Please send any bug reports or fixes you make to the |
15 | * email address(es): | |
31956660 | 16 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 LT |
17 | * |
18 | * Or submit a bug report through the following website: | |
19 | * http://www.sf.net/projects/lksctp | |
20 | * | |
21 | * Written or modified by: | |
22 | * La Monte H.P. Yarroll <piggy@acm.org> | |
23 | * Karl Knutson <karl@athena.chicago.il.us> | |
24 | * Jon Grimm <jgrimm@us.ibm.com> | |
25 | * Xingang Guo <xingang.guo@intel.com> | |
26 | * randall@sctp.chicago.il.us | |
27 | * kmorneau@cisco.com | |
28 | * qxie1@email.mot.com | |
29 | * Sridhar Samudrala <sri@us.ibm.com> | |
30 | * Kevin Gao <kevin.gao@intel.com> | |
31 | * | |
32 | * Any bugs reported given to us we will try to fix... any fixes shared will | |
33 | * be incorporated into the next SCTP release. | |
34 | */ | |
35 | #ifndef __LINUX_SCTP_H__ | |
36 | #define __LINUX_SCTP_H__ | |
37 | ||
38 | #include <linux/in.h> /* We need in_addr. */ | |
39 | #include <linux/in6.h> /* We need in6_addr. */ | |
1b866434 | 40 | #include <linux/skbuff.h> |
1da177e4 | 41 | |
1b866434 | 42 | #include <uapi/linux/sctp.h> |
1da177e4 LT |
43 | |
44 | /* Section 3.1. SCTP Common Header Format */ | |
ae146d9b | 45 | struct sctphdr { |
f3ffaf14 AV |
46 | __be16 source; |
47 | __be16 dest; | |
48 | __be32 vtag; | |
4458f04c | 49 | __le32 checksum; |
ae146d9b | 50 | }; |
1da177e4 | 51 | |
2c0fd387 ACM |
52 | static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb) |
53 | { | |
9c70220b | 54 | return (struct sctphdr *)skb_transport_header(skb); |
2c0fd387 | 55 | } |
2c0fd387 | 56 | |
1da177e4 | 57 | /* Section 3.2. Chunk Field Descriptions. */ |
922dbc5b | 58 | struct sctp_chunkhdr { |
1da177e4 LT |
59 | __u8 type; |
60 | __u8 flags; | |
f3ffaf14 | 61 | __be16 length; |
922dbc5b | 62 | }; |
1da177e4 LT |
63 | |
64 | ||
65 | /* Section 3.2. Chunk Type Values. | |
66 | * [Chunk Type] identifies the type of information contained in the Chunk | |
67 | * Value field. It takes a value from 0 to 254. The value of 255 is | |
68 | * reserved for future use as an extension field. | |
69 | */ | |
6d85e68f | 70 | enum sctp_cid { |
1da177e4 LT |
71 | SCTP_CID_DATA = 0, |
72 | SCTP_CID_INIT = 1, | |
73 | SCTP_CID_INIT_ACK = 2, | |
74 | SCTP_CID_SACK = 3, | |
75 | SCTP_CID_HEARTBEAT = 4, | |
76 | SCTP_CID_HEARTBEAT_ACK = 5, | |
77 | SCTP_CID_ABORT = 6, | |
78 | SCTP_CID_SHUTDOWN = 7, | |
79 | SCTP_CID_SHUTDOWN_ACK = 8, | |
80 | SCTP_CID_ERROR = 9, | |
81 | SCTP_CID_COOKIE_ECHO = 10, | |
82 | SCTP_CID_COOKIE_ACK = 11, | |
83 | SCTP_CID_ECN_ECNE = 12, | |
84 | SCTP_CID_ECN_CWR = 13, | |
85 | SCTP_CID_SHUTDOWN_COMPLETE = 14, | |
86 | ||
f7b0e93b VY |
87 | /* AUTH Extension Section 4.1 */ |
88 | SCTP_CID_AUTH = 0x0F, | |
89 | ||
96b120b3 XL |
90 | /* sctp ndata 5.1. I-DATA */ |
91 | SCTP_CID_I_DATA = 0x40, | |
92 | ||
1da177e4 LT |
93 | /* PR-SCTP Sec 3.2 */ |
94 | SCTP_CID_FWD_TSN = 0xC0, | |
95 | ||
96 | /* Use hex, as defined in ADDIP sec. 3.1 */ | |
97 | SCTP_CID_ASCONF = 0xC1, | |
2d07a49a | 98 | SCTP_CID_I_FWD_TSN = 0xC2, |
1da177e4 | 99 | SCTP_CID_ASCONF_ACK = 0x80, |
cc16f00f | 100 | SCTP_CID_RECONF = 0x82, |
6d85e68f | 101 | }; /* enum */ |
1da177e4 LT |
102 | |
103 | ||
104 | /* Section 3.2 | |
105 | * Chunk Types are encoded such that the highest-order two bits specify | |
106 | * the action that must be taken if the processing endpoint does not | |
107 | * recognize the Chunk Type. | |
108 | */ | |
ec431c2c | 109 | enum { |
1da177e4 LT |
110 | SCTP_CID_ACTION_DISCARD = 0x00, |
111 | SCTP_CID_ACTION_DISCARD_ERR = 0x40, | |
112 | SCTP_CID_ACTION_SKIP = 0x80, | |
113 | SCTP_CID_ACTION_SKIP_ERR = 0xc0, | |
ec431c2c | 114 | }; |
1da177e4 LT |
115 | |
116 | enum { SCTP_CID_ACTION_MASK = 0xc0, }; | |
117 | ||
118 | /* This flag is used in Chunk Flags for ABORT and SHUTDOWN COMPLETE. | |
119 | * | |
120 | * 3.3.7 Abort Association (ABORT) (6): | |
121 | * The T bit is set to 0 if the sender had a TCB that it destroyed. | |
122 | * If the sender did not have a TCB it should set this bit to 1. | |
123 | */ | |
124 | enum { SCTP_CHUNK_FLAG_T = 0x01 }; | |
125 | ||
126 | /* | |
127 | * Set the T bit | |
128 | * | |
129 | * 0 1 2 3 | |
130 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
131 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
132 | * | Type = 14 |Reserved |T| Length = 4 | | |
133 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
134 | * | |
135 | * Chunk Flags: 8 bits | |
136 | * | |
137 | * Reserved: 7 bits | |
138 | * Set to 0 on transmit and ignored on receipt. | |
139 | * | |
140 | * T bit: 1 bit | |
141 | * The T bit is set to 0 if the sender had a TCB that it destroyed. If | |
142 | * the sender did NOT have a TCB it should set this bit to 1. | |
143 | * | |
144 | * Note: Special rules apply to this chunk for verification, please | |
145 | * see Section 8.5.1 for details. | |
146 | */ | |
147 | ||
148 | #define sctp_test_T_bit(c) ((c)->chunk_hdr->flags & SCTP_CHUNK_FLAG_T) | |
149 | ||
150 | /* RFC 2960 | |
151 | * Section 3.2.1 Optional/Variable-length Parmaeter Format. | |
152 | */ | |
153 | ||
3c918704 | 154 | struct sctp_paramhdr { |
f3ffaf14 AV |
155 | __be16 type; |
156 | __be16 length; | |
3c918704 | 157 | }; |
1da177e4 | 158 | |
34b4e29b | 159 | enum sctp_param { |
1da177e4 LT |
160 | |
161 | /* RFC 2960 Section 3.3.5 */ | |
f3a7c66b | 162 | SCTP_PARAM_HEARTBEAT_INFO = cpu_to_be16(1), |
1da177e4 | 163 | /* RFC 2960 Section 3.3.2.1 */ |
f3a7c66b HH |
164 | SCTP_PARAM_IPV4_ADDRESS = cpu_to_be16(5), |
165 | SCTP_PARAM_IPV6_ADDRESS = cpu_to_be16(6), | |
166 | SCTP_PARAM_STATE_COOKIE = cpu_to_be16(7), | |
167 | SCTP_PARAM_UNRECOGNIZED_PARAMETERS = cpu_to_be16(8), | |
168 | SCTP_PARAM_COOKIE_PRESERVATIVE = cpu_to_be16(9), | |
169 | SCTP_PARAM_HOST_NAME_ADDRESS = cpu_to_be16(11), | |
170 | SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = cpu_to_be16(12), | |
171 | SCTP_PARAM_ECN_CAPABLE = cpu_to_be16(0x8000), | |
1da177e4 | 172 | |
f7b0e93b | 173 | /* AUTH Extension Section 3 */ |
f3a7c66b HH |
174 | SCTP_PARAM_RANDOM = cpu_to_be16(0x8002), |
175 | SCTP_PARAM_CHUNKS = cpu_to_be16(0x8003), | |
176 | SCTP_PARAM_HMAC_ALGO = cpu_to_be16(0x8004), | |
f7b0e93b | 177 | |
131a47e3 | 178 | /* Add-IP: Supported Extensions, Section 4.2 */ |
f3a7c66b | 179 | SCTP_PARAM_SUPPORTED_EXT = cpu_to_be16(0x8008), |
131a47e3 | 180 | |
1da177e4 | 181 | /* PR-SCTP Sec 3.1 */ |
f3a7c66b | 182 | SCTP_PARAM_FWD_TSN_SUPPORT = cpu_to_be16(0xc000), |
1da177e4 LT |
183 | |
184 | /* Add-IP Extension. Section 3.2 */ | |
f3a7c66b HH |
185 | SCTP_PARAM_ADD_IP = cpu_to_be16(0xc001), |
186 | SCTP_PARAM_DEL_IP = cpu_to_be16(0xc002), | |
187 | SCTP_PARAM_ERR_CAUSE = cpu_to_be16(0xc003), | |
188 | SCTP_PARAM_SET_PRIMARY = cpu_to_be16(0xc004), | |
189 | SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005), | |
190 | SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006), | |
1da177e4 | 191 | |
cc16f00f XL |
192 | /* RE-CONFIG. Section 4 */ |
193 | SCTP_PARAM_RESET_OUT_REQUEST = cpu_to_be16(0x000d), | |
194 | SCTP_PARAM_RESET_IN_REQUEST = cpu_to_be16(0x000e), | |
195 | SCTP_PARAM_RESET_TSN_REQUEST = cpu_to_be16(0x000f), | |
196 | SCTP_PARAM_RESET_RESPONSE = cpu_to_be16(0x0010), | |
197 | SCTP_PARAM_RESET_ADD_OUT_STREAMS = cpu_to_be16(0x0011), | |
198 | SCTP_PARAM_RESET_ADD_IN_STREAMS = cpu_to_be16(0x0012), | |
34b4e29b | 199 | }; /* enum */ |
1da177e4 LT |
200 | |
201 | ||
202 | /* RFC 2960 Section 3.2.1 | |
203 | * The Parameter Types are encoded such that the highest-order two bits | |
204 | * specify the action that must be taken if the processing endpoint does | |
205 | * not recognize the Parameter Type. | |
206 | * | |
207 | */ | |
0664ed43 | 208 | enum { |
f3a7c66b HH |
209 | SCTP_PARAM_ACTION_DISCARD = cpu_to_be16(0x0000), |
210 | SCTP_PARAM_ACTION_DISCARD_ERR = cpu_to_be16(0x4000), | |
211 | SCTP_PARAM_ACTION_SKIP = cpu_to_be16(0x8000), | |
212 | SCTP_PARAM_ACTION_SKIP_ERR = cpu_to_be16(0xc000), | |
0664ed43 | 213 | }; |
1da177e4 | 214 | |
f3a7c66b | 215 | enum { SCTP_PARAM_ACTION_MASK = cpu_to_be16(0xc000), }; |
1da177e4 LT |
216 | |
217 | /* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */ | |
218 | ||
3583df1a | 219 | struct sctp_datahdr { |
f3ffaf14 AV |
220 | __be32 tsn; |
221 | __be16 stream; | |
222 | __be16 ssn; | |
978aa047 | 223 | __u32 ppid; |
1da177e4 | 224 | __u8 payload[0]; |
3583df1a | 225 | }; |
1da177e4 | 226 | |
9f8d3147 | 227 | struct sctp_data_chunk { |
922dbc5b | 228 | struct sctp_chunkhdr chunk_hdr; |
3583df1a | 229 | struct sctp_datahdr data_hdr; |
9f8d3147 | 230 | }; |
1da177e4 | 231 | |
ad05a7a0 XL |
232 | struct sctp_idatahdr { |
233 | __be32 tsn; | |
234 | __be16 stream; | |
235 | __be16 reserved; | |
236 | __be32 mid; | |
237 | union { | |
238 | __u32 ppid; | |
239 | __be32 fsn; | |
240 | }; | |
241 | __u8 payload[0]; | |
242 | }; | |
243 | ||
244 | struct sctp_idata_chunk { | |
245 | struct sctp_chunkhdr chunk_hdr; | |
246 | struct sctp_idatahdr data_hdr; | |
247 | }; | |
248 | ||
1da177e4 LT |
249 | /* DATA Chuck Specific Flags */ |
250 | enum { | |
251 | SCTP_DATA_MIDDLE_FRAG = 0x00, | |
252 | SCTP_DATA_LAST_FRAG = 0x01, | |
253 | SCTP_DATA_FIRST_FRAG = 0x02, | |
254 | SCTP_DATA_NOT_FRAG = 0x03, | |
255 | SCTP_DATA_UNORDERED = 0x04, | |
475cba4e | 256 | SCTP_DATA_SACK_IMM = 0x08, |
1da177e4 LT |
257 | }; |
258 | enum { SCTP_DATA_FRAG_MASK = 0x03, }; | |
259 | ||
260 | ||
261 | /* RFC 2960 Section 3.3.2 Initiation (INIT) (1) | |
262 | * | |
263 | * This chunk is used to initiate a SCTP association between two | |
264 | * endpoints. | |
265 | */ | |
4ae70c08 | 266 | struct sctp_inithdr { |
f3ffaf14 AV |
267 | __be32 init_tag; |
268 | __be32 a_rwnd; | |
269 | __be16 num_outbound_streams; | |
270 | __be16 num_inbound_streams; | |
271 | __be32 initial_tsn; | |
1da177e4 | 272 | __u8 params[0]; |
4ae70c08 | 273 | }; |
1da177e4 | 274 | |
01a992be | 275 | struct sctp_init_chunk { |
922dbc5b | 276 | struct sctp_chunkhdr chunk_hdr; |
4ae70c08 | 277 | struct sctp_inithdr init_hdr; |
01a992be | 278 | }; |
1da177e4 LT |
279 | |
280 | ||
281 | /* Section 3.3.2.1. IPv4 Address Parameter (5) */ | |
a38905e6 | 282 | struct sctp_ipv4addr_param { |
3c918704 | 283 | struct sctp_paramhdr param_hdr; |
a38905e6 XL |
284 | struct in_addr addr; |
285 | }; | |
1da177e4 LT |
286 | |
287 | /* Section 3.3.2.1. IPv6 Address Parameter (6) */ | |
00987cc0 | 288 | struct sctp_ipv6addr_param { |
3c918704 | 289 | struct sctp_paramhdr param_hdr; |
1da177e4 | 290 | struct in6_addr addr; |
00987cc0 | 291 | }; |
1da177e4 LT |
292 | |
293 | /* Section 3.3.2.1 Cookie Preservative (9) */ | |
365ddb65 | 294 | struct sctp_cookie_preserve_param { |
3c918704 | 295 | struct sctp_paramhdr param_hdr; |
365ddb65 XL |
296 | __be32 lifespan_increment; |
297 | }; | |
1da177e4 LT |
298 | |
299 | /* Section 3.3.2.1 Host Name Address (11) */ | |
df9af006 | 300 | struct sctp_hostname_param { |
3c918704 | 301 | struct sctp_paramhdr param_hdr; |
1da177e4 | 302 | uint8_t hostname[0]; |
df9af006 | 303 | }; |
1da177e4 LT |
304 | |
305 | /* Section 3.3.2.1 Supported Address Types (12) */ | |
e925d506 | 306 | struct sctp_supported_addrs_param { |
3c918704 | 307 | struct sctp_paramhdr param_hdr; |
f3ffaf14 | 308 | __be16 types[0]; |
e925d506 | 309 | }; |
1da177e4 | 310 | |
0f3fffd8 | 311 | /* ADDIP Section 3.2.6 Adaptation Layer Indication */ |
85f6bd24 | 312 | struct sctp_adaptation_ind_param { |
1da177e4 | 313 | struct sctp_paramhdr param_hdr; |
0f3fffd8 | 314 | __be32 adaptation_ind; |
85f6bd24 | 315 | }; |
1da177e4 | 316 | |
131a47e3 | 317 | /* ADDIP Section 4.2.7 Supported Extensions Parameter */ |
15328d9f | 318 | struct sctp_supported_ext_param { |
131a47e3 VY |
319 | struct sctp_paramhdr param_hdr; |
320 | __u8 chunks[0]; | |
15328d9f | 321 | }; |
131a47e3 | 322 | |
f7b0e93b | 323 | /* AUTH Section 3.1 Random */ |
b02db702 | 324 | struct sctp_random_param { |
3c918704 | 325 | struct sctp_paramhdr param_hdr; |
f7b0e93b | 326 | __u8 random_val[0]; |
b02db702 | 327 | }; |
f7b0e93b VY |
328 | |
329 | /* AUTH Section 3.2 Chunk List */ | |
a762a9d9 | 330 | struct sctp_chunks_param { |
3c918704 | 331 | struct sctp_paramhdr param_hdr; |
f7b0e93b | 332 | __u8 chunks[0]; |
a762a9d9 | 333 | }; |
f7b0e93b VY |
334 | |
335 | /* AUTH Section 3.3 HMAC Algorithm */ | |
1474774a | 336 | struct sctp_hmac_algo_param { |
3c918704 | 337 | struct sctp_paramhdr param_hdr; |
f7b0e93b | 338 | __be16 hmac_ids[0]; |
1474774a | 339 | }; |
f7b0e93b | 340 | |
1da177e4 LT |
341 | /* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2): |
342 | * The INIT ACK chunk is used to acknowledge the initiation of an SCTP | |
343 | * association. | |
344 | */ | |
cb1844c4 XL |
345 | struct sctp_initack_chunk { |
346 | struct sctp_chunkhdr chunk_hdr; | |
347 | struct sctp_inithdr init_hdr; | |
348 | }; | |
1da177e4 LT |
349 | |
350 | /* Section 3.3.3.1 State Cookie (7) */ | |
f48ef4c7 | 351 | struct sctp_cookie_param { |
3c918704 | 352 | struct sctp_paramhdr p; |
1da177e4 | 353 | __u8 body[0]; |
f48ef4c7 | 354 | }; |
1da177e4 LT |
355 | |
356 | /* Section 3.3.3.1 Unrecognized Parameters (8) */ | |
62e6b7e4 | 357 | struct sctp_unrecognized_param { |
3c918704 XL |
358 | struct sctp_paramhdr param_hdr; |
359 | struct sctp_paramhdr unrecognized; | |
62e6b7e4 | 360 | }; |
1da177e4 LT |
361 | |
362 | ||
363 | ||
364 | /* | |
365 | * 3.3.4 Selective Acknowledgement (SACK) (3): | |
366 | * | |
367 | * This chunk is sent to the peer endpoint to acknowledge received DATA | |
368 | * chunks and to inform the peer endpoint of gaps in the received | |
369 | * subsequences of DATA chunks as represented by their TSNs. | |
370 | */ | |
371 | ||
fe9a0fe7 | 372 | struct sctp_gap_ack_block { |
f3ffaf14 AV |
373 | __be16 start; |
374 | __be16 end; | |
fe9a0fe7 | 375 | }; |
1da177e4 | 376 | |
afd93b7b | 377 | union sctp_sack_variable { |
fe9a0fe7 | 378 | struct sctp_gap_ack_block gab; |
9b415156 | 379 | __be32 dup; |
afd93b7b | 380 | }; |
1da177e4 | 381 | |
78731085 | 382 | struct sctp_sackhdr { |
f3ffaf14 AV |
383 | __be32 cum_tsn_ack; |
384 | __be32 a_rwnd; | |
385 | __be16 num_gap_ack_blocks; | |
386 | __be16 num_dup_tsns; | |
afd93b7b | 387 | union sctp_sack_variable variable[0]; |
78731085 | 388 | }; |
1da177e4 | 389 | |
d4d6c614 | 390 | struct sctp_sack_chunk { |
922dbc5b | 391 | struct sctp_chunkhdr chunk_hdr; |
78731085 | 392 | struct sctp_sackhdr sack_hdr; |
d4d6c614 | 393 | }; |
1da177e4 LT |
394 | |
395 | ||
396 | /* RFC 2960. Section 3.3.5 Heartbeat Request (HEARTBEAT) (4): | |
397 | * | |
398 | * An endpoint should send this chunk to its peer endpoint to probe the | |
399 | * reachability of a particular destination transport address defined in | |
400 | * the present association. | |
401 | */ | |
402 | ||
4d2dcdf4 | 403 | struct sctp_heartbeathdr { |
3c918704 | 404 | struct sctp_paramhdr info; |
4d2dcdf4 | 405 | }; |
1da177e4 | 406 | |
38c00f74 | 407 | struct sctp_heartbeat_chunk { |
922dbc5b | 408 | struct sctp_chunkhdr chunk_hdr; |
4d2dcdf4 | 409 | struct sctp_heartbeathdr hb_hdr; |
38c00f74 | 410 | }; |
1da177e4 LT |
411 | |
412 | ||
413 | /* For the abort and shutdown ACK we must carry the init tag in the | |
414 | * common header. Just the common header is all that is needed with a | |
415 | * chunk descriptor. | |
416 | */ | |
441ae65a | 417 | struct sctp_abort_chunk { |
922dbc5b | 418 | struct sctp_chunkhdr uh; |
441ae65a | 419 | }; |
1da177e4 LT |
420 | |
421 | ||
422 | /* For the graceful shutdown we must carry the tag (in common header) | |
423 | * and the highest consecutive acking value. | |
424 | */ | |
e61e4055 | 425 | struct sctp_shutdownhdr { |
f3ffaf14 | 426 | __be32 cum_tsn_ack; |
e61e4055 | 427 | }; |
1da177e4 | 428 | |
ac23e681 | 429 | struct sctp_shutdown_chunk { |
922dbc5b | 430 | struct sctp_chunkhdr chunk_hdr; |
e61e4055 | 431 | struct sctp_shutdownhdr shutdown_hdr; |
85c727b5 | 432 | }; |
1da177e4 LT |
433 | |
434 | /* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */ | |
435 | ||
d8238d9d | 436 | struct sctp_errhdr { |
f3ffaf14 AV |
437 | __be16 cause; |
438 | __be16 length; | |
1da177e4 | 439 | __u8 variable[0]; |
d8238d9d | 440 | }; |
1da177e4 | 441 | |
87caeba7 | 442 | struct sctp_operr_chunk { |
922dbc5b | 443 | struct sctp_chunkhdr chunk_hdr; |
d8238d9d | 444 | struct sctp_errhdr err_hdr; |
87caeba7 | 445 | }; |
1da177e4 LT |
446 | |
447 | /* RFC 2960 3.3.10 - Operation Error | |
448 | * | |
449 | * Cause Code: 16 bits (unsigned integer) | |
450 | * | |
451 | * Defines the type of error conditions being reported. | |
452 | * Cause Code | |
453 | * Value Cause Code | |
454 | * --------- ---------------- | |
455 | * 1 Invalid Stream Identifier | |
456 | * 2 Missing Mandatory Parameter | |
457 | * 3 Stale Cookie Error | |
458 | * 4 Out of Resource | |
459 | * 5 Unresolvable Address | |
460 | * 6 Unrecognized Chunk Type | |
461 | * 7 Invalid Mandatory Parameter | |
462 | * 8 Unrecognized Parameters | |
463 | * 9 No User Data | |
464 | * 10 Cookie Received While Shutting Down | |
465 | */ | |
2a493216 | 466 | enum sctp_error { |
1da177e4 | 467 | |
f3a7c66b HH |
468 | SCTP_ERROR_NO_ERROR = cpu_to_be16(0x00), |
469 | SCTP_ERROR_INV_STRM = cpu_to_be16(0x01), | |
470 | SCTP_ERROR_MISS_PARAM = cpu_to_be16(0x02), | |
471 | SCTP_ERROR_STALE_COOKIE = cpu_to_be16(0x03), | |
472 | SCTP_ERROR_NO_RESOURCE = cpu_to_be16(0x04), | |
473 | SCTP_ERROR_DNS_FAILED = cpu_to_be16(0x05), | |
474 | SCTP_ERROR_UNKNOWN_CHUNK = cpu_to_be16(0x06), | |
475 | SCTP_ERROR_INV_PARAM = cpu_to_be16(0x07), | |
476 | SCTP_ERROR_UNKNOWN_PARAM = cpu_to_be16(0x08), | |
477 | SCTP_ERROR_NO_DATA = cpu_to_be16(0x09), | |
478 | SCTP_ERROR_COOKIE_IN_SHUTDOWN = cpu_to_be16(0x0a), | |
1da177e4 LT |
479 | |
480 | ||
481 | /* SCTP Implementation Guide: | |
482 | * 11 Restart of an association with new addresses | |
483 | * 12 User Initiated Abort | |
484 | * 13 Protocol Violation | |
485 | */ | |
486 | ||
f3a7c66b HH |
487 | SCTP_ERROR_RESTART = cpu_to_be16(0x0b), |
488 | SCTP_ERROR_USER_ABORT = cpu_to_be16(0x0c), | |
489 | SCTP_ERROR_PROTO_VIOLATION = cpu_to_be16(0x0d), | |
1da177e4 LT |
490 | |
491 | /* ADDIP Section 3.3 New Error Causes | |
492 | * | |
493 | * Four new Error Causes are added to the SCTP Operational Errors, | |
494 | * primarily for use in the ASCONF-ACK chunk. | |
495 | * | |
496 | * Value Cause Code | |
497 | * --------- ---------------- | |
a84db794 WY |
498 | * 0x00A0 Request to Delete Last Remaining IP Address. |
499 | * 0x00A1 Operation Refused Due to Resource Shortage. | |
500 | * 0x00A2 Request to Delete Source IP Address. | |
501 | * 0x00A3 Association Aborted due to illegal ASCONF-ACK | |
502 | * 0x00A4 Request refused - no authorization. | |
1da177e4 | 503 | */ |
a84db794 WY |
504 | SCTP_ERROR_DEL_LAST_IP = cpu_to_be16(0x00A0), |
505 | SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x00A1), | |
506 | SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x00A2), | |
507 | SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x00A3), | |
508 | SCTP_ERROR_REQ_REFUSED = cpu_to_be16(0x00A4), | |
f7b0e93b VY |
509 | |
510 | /* AUTH Section 4. New Error Cause | |
511 | * | |
512 | * This section defines a new error cause that will be sent if an AUTH | |
513 | * chunk is received with an unsupported HMAC identifier. | |
514 | * illustrates the new error cause. | |
515 | * | |
516 | * Cause Code Error Cause Name | |
517 | * -------------------------------------------------------------- | |
518 | * 0x0105 Unsupported HMAC Identifier | |
519 | */ | |
f3a7c66b | 520 | SCTP_ERROR_UNSUP_HMAC = cpu_to_be16(0x0105) |
2a493216 | 521 | }; |
1da177e4 LT |
522 | |
523 | ||
524 | ||
525 | /* RFC 2960. Appendix A. Explicit Congestion Notification. | |
526 | * Explicit Congestion Notification Echo (ECNE) (12) | |
527 | */ | |
1fb6d83b | 528 | struct sctp_ecnehdr { |
f3ffaf14 | 529 | __be32 lowest_tsn; |
1fb6d83b | 530 | }; |
1da177e4 | 531 | |
b515fd27 | 532 | struct sctp_ecne_chunk { |
922dbc5b | 533 | struct sctp_chunkhdr chunk_hdr; |
1fb6d83b | 534 | struct sctp_ecnehdr ence_hdr; |
b515fd27 | 535 | }; |
1da177e4 LT |
536 | |
537 | /* RFC 2960. Appendix A. Explicit Congestion Notification. | |
538 | * Congestion Window Reduced (CWR) (13) | |
539 | */ | |
65f77105 | 540 | struct sctp_cwrhdr { |
f3ffaf14 | 541 | __be32 lowest_tsn; |
65f77105 | 542 | }; |
1da177e4 | 543 | |
1da177e4 LT |
544 | /* PR-SCTP |
545 | * 3.2 Forward Cumulative TSN Chunk Definition (FORWARD TSN) | |
546 | * | |
547 | * Forward Cumulative TSN chunk has the following format: | |
548 | * | |
549 | * 0 1 2 3 | |
550 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
551 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
552 | * | Type = 192 | Flags = 0x00 | Length = Variable | | |
553 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
554 | * | New Cumulative TSN | | |
555 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
556 | * | Stream-1 | Stream Sequence-1 | | |
557 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
558 | * \ / | |
559 | * / \ | |
560 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
561 | * | Stream-N | Stream Sequence-N | | |
562 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
563 | * | |
564 | * Chunk Flags: | |
565 | * | |
566 | * Set to all zeros on transmit and ignored on receipt. | |
567 | * | |
568 | * New Cumulative TSN: 32 bit u_int | |
569 | * | |
570 | * This indicates the new cumulative TSN to the data receiver. Upon | |
571 | * the reception of this value, the data receiver MUST consider | |
572 | * any missing TSNs earlier than or equal to this value as received | |
573 | * and stop reporting them as gaps in any subsequent SACKs. | |
574 | * | |
575 | * Stream-N: 16 bit u_int | |
576 | * | |
577 | * This field holds a stream number that was skipped by this | |
578 | * FWD-TSN. | |
579 | * | |
580 | * Stream Sequence-N: 16 bit u_int | |
581 | * This field holds the sequence number associated with the stream | |
582 | * that was skipped. The stream sequence field holds the largest stream | |
583 | * sequence number in this stream being skipped. The receiver of | |
584 | * the FWD-TSN's can use the Stream-N and Stream Sequence-N fields | |
585 | * to enable delivery of any stranded TSN's that remain on the stream | |
586 | * re-ordering queues. This field MUST NOT report TSN's corresponding | |
587 | * to DATA chunk that are marked as unordered. For ordered DATA | |
588 | * chunks this field MUST be filled in. | |
589 | */ | |
590 | struct sctp_fwdtsn_skip { | |
f3ffaf14 AV |
591 | __be16 stream; |
592 | __be16 ssn; | |
85c727b5 | 593 | }; |
1da177e4 LT |
594 | |
595 | struct sctp_fwdtsn_hdr { | |
f3ffaf14 | 596 | __be32 new_cum_tsn; |
1da177e4 | 597 | struct sctp_fwdtsn_skip skip[0]; |
85c727b5 | 598 | }; |
1da177e4 LT |
599 | |
600 | struct sctp_fwdtsn_chunk { | |
601 | struct sctp_chunkhdr chunk_hdr; | |
602 | struct sctp_fwdtsn_hdr fwdtsn_hdr; | |
85c727b5 | 603 | }; |
1da177e4 | 604 | |
2d07a49a XL |
605 | struct sctp_ifwdtsn_skip { |
606 | __be16 stream; | |
607 | __u8 reserved; | |
608 | __u8 flags; | |
609 | __be32 mid; | |
610 | }; | |
611 | ||
612 | struct sctp_ifwdtsn_hdr { | |
613 | __be32 new_cum_tsn; | |
614 | struct sctp_ifwdtsn_skip skip[0]; | |
615 | }; | |
616 | ||
617 | struct sctp_ifwdtsn_chunk { | |
618 | struct sctp_chunkhdr chunk_hdr; | |
619 | struct sctp_ifwdtsn_hdr fwdtsn_hdr; | |
620 | }; | |
1da177e4 LT |
621 | |
622 | /* ADDIP | |
623 | * Section 3.1.1 Address Configuration Change Chunk (ASCONF) | |
624 | * | |
625 | * Serial Number: 32 bits (unsigned integer) | |
626 | * This value represents a Serial Number for the ASCONF Chunk. The | |
627 | * valid range of Serial Number is from 0 to 2^32-1. | |
628 | * Serial Numbers wrap back to 0 after reaching 2^32 -1. | |
629 | * | |
630 | * Address Parameter: 8 or 20 bytes (depending on type) | |
631 | * The address is an address of the sender of the ASCONF chunk, | |
632 | * the address MUST be considered part of the association by the | |
633 | * peer endpoint. This field may be used by the receiver of the | |
634 | * ASCONF to help in finding the association. This parameter MUST | |
635 | * be present in every ASCONF message i.e. it is a mandatory TLV | |
636 | * parameter. | |
637 | * | |
638 | * ASCONF Parameter: TLV format | |
639 | * Each Address configuration change is represented by a TLV | |
640 | * parameter as defined in Section 3.2. One or more requests may | |
641 | * be present in an ASCONF Chunk. | |
642 | * | |
643 | * Section 3.1.2 Address Configuration Acknowledgement Chunk (ASCONF-ACK) | |
644 | * | |
645 | * Serial Number: 32 bits (unsigned integer) | |
646 | * This value represents the Serial Number for the received ASCONF | |
647 | * Chunk that is acknowledged by this chunk. This value is copied | |
648 | * from the received ASCONF Chunk. | |
649 | * | |
650 | * ASCONF Parameter Response: TLV format | |
651 | * The ASCONF Parameter Response is used in the ASCONF-ACK to | |
652 | * report status of ASCONF processing. | |
653 | */ | |
8b32f234 XL |
654 | struct sctp_addip_param { |
655 | struct sctp_paramhdr param_hdr; | |
656 | __be32 crr_id; | |
657 | }; | |
1da177e4 | 658 | |
65205cc4 | 659 | struct sctp_addiphdr { |
f3ffaf14 | 660 | __be32 serial; |
1da177e4 | 661 | __u8 params[0]; |
65205cc4 | 662 | }; |
1da177e4 | 663 | |
68d75469 | 664 | struct sctp_addip_chunk { |
922dbc5b | 665 | struct sctp_chunkhdr chunk_hdr; |
65205cc4 | 666 | struct sctp_addiphdr addip_hdr; |
68d75469 | 667 | }; |
1da177e4 | 668 | |
f7b0e93b VY |
669 | /* AUTH |
670 | * Section 4.1 Authentication Chunk (AUTH) | |
671 | * | |
672 | * This chunk is used to hold the result of the HMAC calculation. | |
673 | * | |
674 | * 0 1 2 3 | |
675 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
676 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
677 | * | Type = 0x0F | Flags=0 | Length | | |
678 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
679 | * | Shared Key Identifier | HMAC Identifier | | |
680 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
681 | * | | | |
682 | * \ HMAC / | |
683 | * / \ | |
684 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
685 | * | |
686 | * Type: 1 byte (unsigned integer) | |
687 | * This value MUST be set to 0x0F for all AUTH-chunks. | |
688 | * | |
689 | * Flags: 1 byte (unsigned integer) | |
690 | * Set to zero on transmit and ignored on receipt. | |
691 | * | |
692 | * Length: 2 bytes (unsigned integer) | |
693 | * This value holds the length of the HMAC in bytes plus 8. | |
694 | * | |
695 | * Shared Key Identifier: 2 bytes (unsigned integer) | |
696 | * This value describes which endpoint pair shared key is used. | |
697 | * | |
698 | * HMAC Identifier: 2 bytes (unsigned integer) | |
699 | * This value describes which message digest is being used. Table 2 | |
700 | * shows the currently defined values. | |
701 | * | |
702 | * The following Table 2 shows the currently defined values for HMAC | |
703 | * identifiers. | |
704 | * | |
705 | * +-----------------+--------------------------+ | |
706 | * | HMAC Identifier | Message Digest Algorithm | | |
707 | * +-----------------+--------------------------+ | |
708 | * | 0 | Reserved | | |
709 | * | 1 | SHA-1 defined in [8] | | |
710 | * | 2 | Reserved | | |
711 | * | 3 | SHA-256 defined in [8] | | |
712 | * +-----------------+--------------------------+ | |
713 | * | |
714 | * | |
715 | * HMAC: n bytes (unsigned integer) This hold the result of the HMAC | |
716 | * calculation. | |
717 | */ | |
96f7ef4d | 718 | struct sctp_authhdr { |
f7b0e93b VY |
719 | __be16 shkey_id; |
720 | __be16 hmac_id; | |
721 | __u8 hmac[0]; | |
96f7ef4d | 722 | }; |
f7b0e93b | 723 | |
bb96dec7 | 724 | struct sctp_auth_chunk { |
922dbc5b | 725 | struct sctp_chunkhdr chunk_hdr; |
96f7ef4d | 726 | struct sctp_authhdr auth_hdr; |
bb96dec7 | 727 | }; |
f7b0e93b | 728 | |
52c52a61 XL |
729 | struct sctp_infox { |
730 | struct sctp_info *sctpinfo; | |
731 | struct sctp_association *asoc; | |
732 | }; | |
733 | ||
cc16f00f | 734 | struct sctp_reconf_chunk { |
922dbc5b | 735 | struct sctp_chunkhdr chunk_hdr; |
cc16f00f | 736 | __u8 params[0]; |
9faf1c0f | 737 | }; |
cc16f00f XL |
738 | |
739 | struct sctp_strreset_outreq { | |
3c918704 | 740 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
741 | __be32 request_seq; |
742 | __be32 response_seq; | |
743 | __be32 send_reset_at_tsn; | |
744 | __be16 list_of_streams[0]; | |
9faf1c0f | 745 | }; |
cc16f00f XL |
746 | |
747 | struct sctp_strreset_inreq { | |
3c918704 | 748 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
749 | __be32 request_seq; |
750 | __be16 list_of_streams[0]; | |
9faf1c0f | 751 | }; |
cc16f00f | 752 | |
c56480a1 | 753 | struct sctp_strreset_tsnreq { |
3c918704 | 754 | struct sctp_paramhdr param_hdr; |
1da4fc97 | 755 | __be32 request_seq; |
c56480a1 XL |
756 | }; |
757 | ||
78098117 | 758 | struct sctp_strreset_addstrm { |
3c918704 | 759 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
760 | __be32 request_seq; |
761 | __be16 number_of_streams; | |
762 | __be16 reserved; | |
78098117 XL |
763 | }; |
764 | ||
bd4b9f8b XL |
765 | enum { |
766 | SCTP_STRRESET_NOTHING_TO_DO = 0x00, | |
767 | SCTP_STRRESET_PERFORMED = 0x01, | |
768 | SCTP_STRRESET_DENIED = 0x02, | |
769 | SCTP_STRRESET_ERR_WRONG_SSN = 0x03, | |
770 | SCTP_STRRESET_ERR_IN_PROGRESS = 0x04, | |
771 | SCTP_STRRESET_ERR_BAD_SEQNO = 0x05, | |
772 | SCTP_STRRESET_IN_PROGRESS = 0x06, | |
773 | }; | |
774 | ||
775 | struct sctp_strreset_resp { | |
3c918704 | 776 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
777 | __be32 response_seq; |
778 | __be32 result; | |
bd4b9f8b XL |
779 | }; |
780 | ||
781 | struct sctp_strreset_resptsn { | |
3c918704 | 782 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
783 | __be32 response_seq; |
784 | __be32 result; | |
785 | __be32 senders_next_tsn; | |
786 | __be32 receivers_next_tsn; | |
bd4b9f8b XL |
787 | }; |
788 | ||
8a9c58d2 XL |
789 | enum { |
790 | SCTP_DSCP_SET_MASK = 0x1, | |
791 | SCTP_DSCP_VAL_MASK = 0xfc, | |
792 | SCTP_FLOWLABEL_SET_MASK = 0x100000, | |
793 | SCTP_FLOWLABEL_VAL_MASK = 0xfffff | |
794 | }; | |
795 | ||
1da177e4 | 796 | #endif /* __LINUX_SCTP_H__ */ |