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1da177e4 LT |
1 | /* SCTP kernel reference Implementation |
2 | * (C) Copyright IBM Corp. 2001, 2004 | |
3 | * Copyright (c) 1999-2000 Cisco, Inc. | |
4 | * Copyright (c) 1999-2001 Motorola, Inc. | |
5 | * Copyright (c) 2001 Intel Corp. | |
6 | * Copyright (c) 2001 Nokia, Inc. | |
7 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
8 | * | |
9 | * This file is part of the SCTP kernel reference Implementation | |
10 | * | |
11 | * Various protocol defined structures. | |
12 | * | |
60c778b2 | 13 | * This SCTP implementation is free software; |
1da177e4 LT |
14 | * you can redistribute it and/or modify it under the terms of |
15 | * the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2, or (at your option) | |
17 | * any later version. | |
18 | * | |
60c778b2 | 19 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
20 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
21 | * ************************ | |
22 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
23 | * See the GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
4b2f13a2 JK |
26 | * along with GNU CC; see the file COPYING. If not, see |
27 | * <http://www.gnu.org/licenses/>. | |
1da177e4 LT |
28 | * |
29 | * Please send any bug reports or fixes you make to the | |
30 | * email address(es): | |
31956660 | 31 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 LT |
32 | * |
33 | * Or submit a bug report through the following website: | |
34 | * http://www.sf.net/projects/lksctp | |
35 | * | |
36 | * Written or modified by: | |
37 | * La Monte H.P. Yarroll <piggy@acm.org> | |
38 | * Karl Knutson <karl@athena.chicago.il.us> | |
39 | * Jon Grimm <jgrimm@us.ibm.com> | |
40 | * Xingang Guo <xingang.guo@intel.com> | |
41 | * randall@sctp.chicago.il.us | |
42 | * kmorneau@cisco.com | |
43 | * qxie1@email.mot.com | |
44 | * Sridhar Samudrala <sri@us.ibm.com> | |
45 | * Kevin Gao <kevin.gao@intel.com> | |
46 | * | |
47 | * Any bugs reported given to us we will try to fix... any fixes shared will | |
48 | * be incorporated into the next SCTP release. | |
49 | */ | |
50 | #ifndef __LINUX_SCTP_H__ | |
51 | #define __LINUX_SCTP_H__ | |
52 | ||
53 | #include <linux/in.h> /* We need in_addr. */ | |
54 | #include <linux/in6.h> /* We need in6_addr. */ | |
1b866434 | 55 | #include <linux/skbuff.h> |
1da177e4 | 56 | |
1b866434 | 57 | #include <uapi/linux/sctp.h> |
1da177e4 LT |
58 | |
59 | /* Section 3.1. SCTP Common Header Format */ | |
ae146d9b | 60 | struct sctphdr { |
f3ffaf14 AV |
61 | __be16 source; |
62 | __be16 dest; | |
63 | __be32 vtag; | |
4458f04c | 64 | __le32 checksum; |
ae146d9b | 65 | }; |
1da177e4 | 66 | |
2c0fd387 ACM |
67 | static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb) |
68 | { | |
9c70220b | 69 | return (struct sctphdr *)skb_transport_header(skb); |
2c0fd387 | 70 | } |
2c0fd387 | 71 | |
1da177e4 | 72 | /* Section 3.2. Chunk Field Descriptions. */ |
922dbc5b | 73 | struct sctp_chunkhdr { |
1da177e4 LT |
74 | __u8 type; |
75 | __u8 flags; | |
f3ffaf14 | 76 | __be16 length; |
922dbc5b | 77 | }; |
1da177e4 LT |
78 | |
79 | ||
80 | /* Section 3.2. Chunk Type Values. | |
81 | * [Chunk Type] identifies the type of information contained in the Chunk | |
82 | * Value field. It takes a value from 0 to 254. The value of 255 is | |
83 | * reserved for future use as an extension field. | |
84 | */ | |
6d85e68f | 85 | enum sctp_cid { |
1da177e4 LT |
86 | SCTP_CID_DATA = 0, |
87 | SCTP_CID_INIT = 1, | |
88 | SCTP_CID_INIT_ACK = 2, | |
89 | SCTP_CID_SACK = 3, | |
90 | SCTP_CID_HEARTBEAT = 4, | |
91 | SCTP_CID_HEARTBEAT_ACK = 5, | |
92 | SCTP_CID_ABORT = 6, | |
93 | SCTP_CID_SHUTDOWN = 7, | |
94 | SCTP_CID_SHUTDOWN_ACK = 8, | |
95 | SCTP_CID_ERROR = 9, | |
96 | SCTP_CID_COOKIE_ECHO = 10, | |
97 | SCTP_CID_COOKIE_ACK = 11, | |
98 | SCTP_CID_ECN_ECNE = 12, | |
99 | SCTP_CID_ECN_CWR = 13, | |
100 | SCTP_CID_SHUTDOWN_COMPLETE = 14, | |
101 | ||
f7b0e93b VY |
102 | /* AUTH Extension Section 4.1 */ |
103 | SCTP_CID_AUTH = 0x0F, | |
104 | ||
96b120b3 XL |
105 | /* sctp ndata 5.1. I-DATA */ |
106 | SCTP_CID_I_DATA = 0x40, | |
107 | ||
1da177e4 LT |
108 | /* PR-SCTP Sec 3.2 */ |
109 | SCTP_CID_FWD_TSN = 0xC0, | |
110 | ||
111 | /* Use hex, as defined in ADDIP sec. 3.1 */ | |
112 | SCTP_CID_ASCONF = 0xC1, | |
2d07a49a | 113 | SCTP_CID_I_FWD_TSN = 0xC2, |
1da177e4 | 114 | SCTP_CID_ASCONF_ACK = 0x80, |
cc16f00f | 115 | SCTP_CID_RECONF = 0x82, |
6d85e68f | 116 | }; /* enum */ |
1da177e4 LT |
117 | |
118 | ||
119 | /* Section 3.2 | |
120 | * Chunk Types are encoded such that the highest-order two bits specify | |
121 | * the action that must be taken if the processing endpoint does not | |
122 | * recognize the Chunk Type. | |
123 | */ | |
ec431c2c | 124 | enum { |
1da177e4 LT |
125 | SCTP_CID_ACTION_DISCARD = 0x00, |
126 | SCTP_CID_ACTION_DISCARD_ERR = 0x40, | |
127 | SCTP_CID_ACTION_SKIP = 0x80, | |
128 | SCTP_CID_ACTION_SKIP_ERR = 0xc0, | |
ec431c2c | 129 | }; |
1da177e4 LT |
130 | |
131 | enum { SCTP_CID_ACTION_MASK = 0xc0, }; | |
132 | ||
133 | /* This flag is used in Chunk Flags for ABORT and SHUTDOWN COMPLETE. | |
134 | * | |
135 | * 3.3.7 Abort Association (ABORT) (6): | |
136 | * The T bit is set to 0 if the sender had a TCB that it destroyed. | |
137 | * If the sender did not have a TCB it should set this bit to 1. | |
138 | */ | |
139 | enum { SCTP_CHUNK_FLAG_T = 0x01 }; | |
140 | ||
141 | /* | |
142 | * Set the T bit | |
143 | * | |
144 | * 0 1 2 3 | |
145 | * 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 | |
146 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
147 | * | Type = 14 |Reserved |T| Length = 4 | | |
148 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
149 | * | |
150 | * Chunk Flags: 8 bits | |
151 | * | |
152 | * Reserved: 7 bits | |
153 | * Set to 0 on transmit and ignored on receipt. | |
154 | * | |
155 | * T bit: 1 bit | |
156 | * The T bit is set to 0 if the sender had a TCB that it destroyed. If | |
157 | * the sender did NOT have a TCB it should set this bit to 1. | |
158 | * | |
159 | * Note: Special rules apply to this chunk for verification, please | |
160 | * see Section 8.5.1 for details. | |
161 | */ | |
162 | ||
163 | #define sctp_test_T_bit(c) ((c)->chunk_hdr->flags & SCTP_CHUNK_FLAG_T) | |
164 | ||
165 | /* RFC 2960 | |
166 | * Section 3.2.1 Optional/Variable-length Parmaeter Format. | |
167 | */ | |
168 | ||
3c918704 | 169 | struct sctp_paramhdr { |
f3ffaf14 AV |
170 | __be16 type; |
171 | __be16 length; | |
3c918704 | 172 | }; |
1da177e4 | 173 | |
34b4e29b | 174 | enum sctp_param { |
1da177e4 LT |
175 | |
176 | /* RFC 2960 Section 3.3.5 */ | |
f3a7c66b | 177 | SCTP_PARAM_HEARTBEAT_INFO = cpu_to_be16(1), |
1da177e4 | 178 | /* RFC 2960 Section 3.3.2.1 */ |
f3a7c66b HH |
179 | SCTP_PARAM_IPV4_ADDRESS = cpu_to_be16(5), |
180 | SCTP_PARAM_IPV6_ADDRESS = cpu_to_be16(6), | |
181 | SCTP_PARAM_STATE_COOKIE = cpu_to_be16(7), | |
182 | SCTP_PARAM_UNRECOGNIZED_PARAMETERS = cpu_to_be16(8), | |
183 | SCTP_PARAM_COOKIE_PRESERVATIVE = cpu_to_be16(9), | |
184 | SCTP_PARAM_HOST_NAME_ADDRESS = cpu_to_be16(11), | |
185 | SCTP_PARAM_SUPPORTED_ADDRESS_TYPES = cpu_to_be16(12), | |
186 | SCTP_PARAM_ECN_CAPABLE = cpu_to_be16(0x8000), | |
1da177e4 | 187 | |
f7b0e93b | 188 | /* AUTH Extension Section 3 */ |
f3a7c66b HH |
189 | SCTP_PARAM_RANDOM = cpu_to_be16(0x8002), |
190 | SCTP_PARAM_CHUNKS = cpu_to_be16(0x8003), | |
191 | SCTP_PARAM_HMAC_ALGO = cpu_to_be16(0x8004), | |
f7b0e93b | 192 | |
131a47e3 | 193 | /* Add-IP: Supported Extensions, Section 4.2 */ |
f3a7c66b | 194 | SCTP_PARAM_SUPPORTED_EXT = cpu_to_be16(0x8008), |
131a47e3 | 195 | |
1da177e4 | 196 | /* PR-SCTP Sec 3.1 */ |
f3a7c66b | 197 | SCTP_PARAM_FWD_TSN_SUPPORT = cpu_to_be16(0xc000), |
1da177e4 LT |
198 | |
199 | /* Add-IP Extension. Section 3.2 */ | |
f3a7c66b HH |
200 | SCTP_PARAM_ADD_IP = cpu_to_be16(0xc001), |
201 | SCTP_PARAM_DEL_IP = cpu_to_be16(0xc002), | |
202 | SCTP_PARAM_ERR_CAUSE = cpu_to_be16(0xc003), | |
203 | SCTP_PARAM_SET_PRIMARY = cpu_to_be16(0xc004), | |
204 | SCTP_PARAM_SUCCESS_REPORT = cpu_to_be16(0xc005), | |
205 | SCTP_PARAM_ADAPTATION_LAYER_IND = cpu_to_be16(0xc006), | |
1da177e4 | 206 | |
cc16f00f XL |
207 | /* RE-CONFIG. Section 4 */ |
208 | SCTP_PARAM_RESET_OUT_REQUEST = cpu_to_be16(0x000d), | |
209 | SCTP_PARAM_RESET_IN_REQUEST = cpu_to_be16(0x000e), | |
210 | SCTP_PARAM_RESET_TSN_REQUEST = cpu_to_be16(0x000f), | |
211 | SCTP_PARAM_RESET_RESPONSE = cpu_to_be16(0x0010), | |
212 | SCTP_PARAM_RESET_ADD_OUT_STREAMS = cpu_to_be16(0x0011), | |
213 | SCTP_PARAM_RESET_ADD_IN_STREAMS = cpu_to_be16(0x0012), | |
34b4e29b | 214 | }; /* enum */ |
1da177e4 LT |
215 | |
216 | ||
217 | /* RFC 2960 Section 3.2.1 | |
218 | * The Parameter Types are encoded such that the highest-order two bits | |
219 | * specify the action that must be taken if the processing endpoint does | |
220 | * not recognize the Parameter Type. | |
221 | * | |
222 | */ | |
0664ed43 | 223 | enum { |
f3a7c66b HH |
224 | SCTP_PARAM_ACTION_DISCARD = cpu_to_be16(0x0000), |
225 | SCTP_PARAM_ACTION_DISCARD_ERR = cpu_to_be16(0x4000), | |
226 | SCTP_PARAM_ACTION_SKIP = cpu_to_be16(0x8000), | |
227 | SCTP_PARAM_ACTION_SKIP_ERR = cpu_to_be16(0xc000), | |
0664ed43 | 228 | }; |
1da177e4 | 229 | |
f3a7c66b | 230 | enum { SCTP_PARAM_ACTION_MASK = cpu_to_be16(0xc000), }; |
1da177e4 LT |
231 | |
232 | /* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */ | |
233 | ||
3583df1a | 234 | struct sctp_datahdr { |
f3ffaf14 AV |
235 | __be32 tsn; |
236 | __be16 stream; | |
237 | __be16 ssn; | |
978aa047 | 238 | __u32 ppid; |
1da177e4 | 239 | __u8 payload[0]; |
3583df1a | 240 | }; |
1da177e4 | 241 | |
9f8d3147 | 242 | struct sctp_data_chunk { |
922dbc5b | 243 | struct sctp_chunkhdr chunk_hdr; |
3583df1a | 244 | struct sctp_datahdr data_hdr; |
9f8d3147 | 245 | }; |
1da177e4 | 246 | |
ad05a7a0 XL |
247 | struct sctp_idatahdr { |
248 | __be32 tsn; | |
249 | __be16 stream; | |
250 | __be16 reserved; | |
251 | __be32 mid; | |
252 | union { | |
253 | __u32 ppid; | |
254 | __be32 fsn; | |
255 | }; | |
256 | __u8 payload[0]; | |
257 | }; | |
258 | ||
259 | struct sctp_idata_chunk { | |
260 | struct sctp_chunkhdr chunk_hdr; | |
261 | struct sctp_idatahdr data_hdr; | |
262 | }; | |
263 | ||
1da177e4 LT |
264 | /* DATA Chuck Specific Flags */ |
265 | enum { | |
266 | SCTP_DATA_MIDDLE_FRAG = 0x00, | |
267 | SCTP_DATA_LAST_FRAG = 0x01, | |
268 | SCTP_DATA_FIRST_FRAG = 0x02, | |
269 | SCTP_DATA_NOT_FRAG = 0x03, | |
270 | SCTP_DATA_UNORDERED = 0x04, | |
475cba4e | 271 | SCTP_DATA_SACK_IMM = 0x08, |
1da177e4 LT |
272 | }; |
273 | enum { SCTP_DATA_FRAG_MASK = 0x03, }; | |
274 | ||
275 | ||
276 | /* RFC 2960 Section 3.3.2 Initiation (INIT) (1) | |
277 | * | |
278 | * This chunk is used to initiate a SCTP association between two | |
279 | * endpoints. | |
280 | */ | |
4ae70c08 | 281 | struct sctp_inithdr { |
f3ffaf14 AV |
282 | __be32 init_tag; |
283 | __be32 a_rwnd; | |
284 | __be16 num_outbound_streams; | |
285 | __be16 num_inbound_streams; | |
286 | __be32 initial_tsn; | |
1da177e4 | 287 | __u8 params[0]; |
4ae70c08 | 288 | }; |
1da177e4 | 289 | |
01a992be | 290 | struct sctp_init_chunk { |
922dbc5b | 291 | struct sctp_chunkhdr chunk_hdr; |
4ae70c08 | 292 | struct sctp_inithdr init_hdr; |
01a992be | 293 | }; |
1da177e4 LT |
294 | |
295 | ||
296 | /* Section 3.3.2.1. IPv4 Address Parameter (5) */ | |
a38905e6 | 297 | struct sctp_ipv4addr_param { |
3c918704 | 298 | struct sctp_paramhdr param_hdr; |
a38905e6 XL |
299 | struct in_addr addr; |
300 | }; | |
1da177e4 LT |
301 | |
302 | /* Section 3.3.2.1. IPv6 Address Parameter (6) */ | |
00987cc0 | 303 | struct sctp_ipv6addr_param { |
3c918704 | 304 | struct sctp_paramhdr param_hdr; |
1da177e4 | 305 | struct in6_addr addr; |
00987cc0 | 306 | }; |
1da177e4 LT |
307 | |
308 | /* Section 3.3.2.1 Cookie Preservative (9) */ | |
365ddb65 | 309 | struct sctp_cookie_preserve_param { |
3c918704 | 310 | struct sctp_paramhdr param_hdr; |
365ddb65 XL |
311 | __be32 lifespan_increment; |
312 | }; | |
1da177e4 LT |
313 | |
314 | /* Section 3.3.2.1 Host Name Address (11) */ | |
df9af006 | 315 | struct sctp_hostname_param { |
3c918704 | 316 | struct sctp_paramhdr param_hdr; |
1da177e4 | 317 | uint8_t hostname[0]; |
df9af006 | 318 | }; |
1da177e4 LT |
319 | |
320 | /* Section 3.3.2.1 Supported Address Types (12) */ | |
e925d506 | 321 | struct sctp_supported_addrs_param { |
3c918704 | 322 | struct sctp_paramhdr param_hdr; |
f3ffaf14 | 323 | __be16 types[0]; |
e925d506 | 324 | }; |
1da177e4 | 325 | |
0f3fffd8 | 326 | /* ADDIP Section 3.2.6 Adaptation Layer Indication */ |
85f6bd24 | 327 | struct sctp_adaptation_ind_param { |
1da177e4 | 328 | struct sctp_paramhdr param_hdr; |
0f3fffd8 | 329 | __be32 adaptation_ind; |
85f6bd24 | 330 | }; |
1da177e4 | 331 | |
131a47e3 | 332 | /* ADDIP Section 4.2.7 Supported Extensions Parameter */ |
15328d9f | 333 | struct sctp_supported_ext_param { |
131a47e3 VY |
334 | struct sctp_paramhdr param_hdr; |
335 | __u8 chunks[0]; | |
15328d9f | 336 | }; |
131a47e3 | 337 | |
f7b0e93b | 338 | /* AUTH Section 3.1 Random */ |
b02db702 | 339 | struct sctp_random_param { |
3c918704 | 340 | struct sctp_paramhdr param_hdr; |
f7b0e93b | 341 | __u8 random_val[0]; |
b02db702 | 342 | }; |
f7b0e93b VY |
343 | |
344 | /* AUTH Section 3.2 Chunk List */ | |
a762a9d9 | 345 | struct sctp_chunks_param { |
3c918704 | 346 | struct sctp_paramhdr param_hdr; |
f7b0e93b | 347 | __u8 chunks[0]; |
a762a9d9 | 348 | }; |
f7b0e93b VY |
349 | |
350 | /* AUTH Section 3.3 HMAC Algorithm */ | |
1474774a | 351 | struct sctp_hmac_algo_param { |
3c918704 | 352 | struct sctp_paramhdr param_hdr; |
f7b0e93b | 353 | __be16 hmac_ids[0]; |
1474774a | 354 | }; |
f7b0e93b | 355 | |
1da177e4 LT |
356 | /* RFC 2960. Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2): |
357 | * The INIT ACK chunk is used to acknowledge the initiation of an SCTP | |
358 | * association. | |
359 | */ | |
cb1844c4 XL |
360 | struct sctp_initack_chunk { |
361 | struct sctp_chunkhdr chunk_hdr; | |
362 | struct sctp_inithdr init_hdr; | |
363 | }; | |
1da177e4 LT |
364 | |
365 | /* Section 3.3.3.1 State Cookie (7) */ | |
f48ef4c7 | 366 | struct sctp_cookie_param { |
3c918704 | 367 | struct sctp_paramhdr p; |
1da177e4 | 368 | __u8 body[0]; |
f48ef4c7 | 369 | }; |
1da177e4 LT |
370 | |
371 | /* Section 3.3.3.1 Unrecognized Parameters (8) */ | |
62e6b7e4 | 372 | struct sctp_unrecognized_param { |
3c918704 XL |
373 | struct sctp_paramhdr param_hdr; |
374 | struct sctp_paramhdr unrecognized; | |
62e6b7e4 | 375 | }; |
1da177e4 LT |
376 | |
377 | ||
378 | ||
379 | /* | |
380 | * 3.3.4 Selective Acknowledgement (SACK) (3): | |
381 | * | |
382 | * This chunk is sent to the peer endpoint to acknowledge received DATA | |
383 | * chunks and to inform the peer endpoint of gaps in the received | |
384 | * subsequences of DATA chunks as represented by their TSNs. | |
385 | */ | |
386 | ||
fe9a0fe7 | 387 | struct sctp_gap_ack_block { |
f3ffaf14 AV |
388 | __be16 start; |
389 | __be16 end; | |
fe9a0fe7 | 390 | }; |
1da177e4 | 391 | |
afd93b7b | 392 | union sctp_sack_variable { |
fe9a0fe7 | 393 | struct sctp_gap_ack_block gab; |
9b415156 | 394 | __be32 dup; |
afd93b7b | 395 | }; |
1da177e4 | 396 | |
78731085 | 397 | struct sctp_sackhdr { |
f3ffaf14 AV |
398 | __be32 cum_tsn_ack; |
399 | __be32 a_rwnd; | |
400 | __be16 num_gap_ack_blocks; | |
401 | __be16 num_dup_tsns; | |
afd93b7b | 402 | union sctp_sack_variable variable[0]; |
78731085 | 403 | }; |
1da177e4 | 404 | |
d4d6c614 | 405 | struct sctp_sack_chunk { |
922dbc5b | 406 | struct sctp_chunkhdr chunk_hdr; |
78731085 | 407 | struct sctp_sackhdr sack_hdr; |
d4d6c614 | 408 | }; |
1da177e4 LT |
409 | |
410 | ||
411 | /* RFC 2960. Section 3.3.5 Heartbeat Request (HEARTBEAT) (4): | |
412 | * | |
413 | * An endpoint should send this chunk to its peer endpoint to probe the | |
414 | * reachability of a particular destination transport address defined in | |
415 | * the present association. | |
416 | */ | |
417 | ||
4d2dcdf4 | 418 | struct sctp_heartbeathdr { |
3c918704 | 419 | struct sctp_paramhdr info; |
4d2dcdf4 | 420 | }; |
1da177e4 | 421 | |
38c00f74 | 422 | struct sctp_heartbeat_chunk { |
922dbc5b | 423 | struct sctp_chunkhdr chunk_hdr; |
4d2dcdf4 | 424 | struct sctp_heartbeathdr hb_hdr; |
38c00f74 | 425 | }; |
1da177e4 LT |
426 | |
427 | ||
428 | /* For the abort and shutdown ACK we must carry the init tag in the | |
429 | * common header. Just the common header is all that is needed with a | |
430 | * chunk descriptor. | |
431 | */ | |
441ae65a | 432 | struct sctp_abort_chunk { |
922dbc5b | 433 | struct sctp_chunkhdr uh; |
441ae65a | 434 | }; |
1da177e4 LT |
435 | |
436 | ||
437 | /* For the graceful shutdown we must carry the tag (in common header) | |
438 | * and the highest consecutive acking value. | |
439 | */ | |
e61e4055 | 440 | struct sctp_shutdownhdr { |
f3ffaf14 | 441 | __be32 cum_tsn_ack; |
e61e4055 | 442 | }; |
1da177e4 | 443 | |
ac23e681 | 444 | struct sctp_shutdown_chunk { |
922dbc5b | 445 | struct sctp_chunkhdr chunk_hdr; |
e61e4055 | 446 | struct sctp_shutdownhdr shutdown_hdr; |
85c727b5 | 447 | }; |
1da177e4 LT |
448 | |
449 | /* RFC 2960. Section 3.3.10 Operation Error (ERROR) (9) */ | |
450 | ||
d8238d9d | 451 | struct sctp_errhdr { |
f3ffaf14 AV |
452 | __be16 cause; |
453 | __be16 length; | |
1da177e4 | 454 | __u8 variable[0]; |
d8238d9d | 455 | }; |
1da177e4 | 456 | |
87caeba7 | 457 | struct sctp_operr_chunk { |
922dbc5b | 458 | struct sctp_chunkhdr chunk_hdr; |
d8238d9d | 459 | struct sctp_errhdr err_hdr; |
87caeba7 | 460 | }; |
1da177e4 LT |
461 | |
462 | /* RFC 2960 3.3.10 - Operation Error | |
463 | * | |
464 | * Cause Code: 16 bits (unsigned integer) | |
465 | * | |
466 | * Defines the type of error conditions being reported. | |
467 | * Cause Code | |
468 | * Value Cause Code | |
469 | * --------- ---------------- | |
470 | * 1 Invalid Stream Identifier | |
471 | * 2 Missing Mandatory Parameter | |
472 | * 3 Stale Cookie Error | |
473 | * 4 Out of Resource | |
474 | * 5 Unresolvable Address | |
475 | * 6 Unrecognized Chunk Type | |
476 | * 7 Invalid Mandatory Parameter | |
477 | * 8 Unrecognized Parameters | |
478 | * 9 No User Data | |
479 | * 10 Cookie Received While Shutting Down | |
480 | */ | |
2a493216 | 481 | enum sctp_error { |
1da177e4 | 482 | |
f3a7c66b HH |
483 | SCTP_ERROR_NO_ERROR = cpu_to_be16(0x00), |
484 | SCTP_ERROR_INV_STRM = cpu_to_be16(0x01), | |
485 | SCTP_ERROR_MISS_PARAM = cpu_to_be16(0x02), | |
486 | SCTP_ERROR_STALE_COOKIE = cpu_to_be16(0x03), | |
487 | SCTP_ERROR_NO_RESOURCE = cpu_to_be16(0x04), | |
488 | SCTP_ERROR_DNS_FAILED = cpu_to_be16(0x05), | |
489 | SCTP_ERROR_UNKNOWN_CHUNK = cpu_to_be16(0x06), | |
490 | SCTP_ERROR_INV_PARAM = cpu_to_be16(0x07), | |
491 | SCTP_ERROR_UNKNOWN_PARAM = cpu_to_be16(0x08), | |
492 | SCTP_ERROR_NO_DATA = cpu_to_be16(0x09), | |
493 | SCTP_ERROR_COOKIE_IN_SHUTDOWN = cpu_to_be16(0x0a), | |
1da177e4 LT |
494 | |
495 | ||
496 | /* SCTP Implementation Guide: | |
497 | * 11 Restart of an association with new addresses | |
498 | * 12 User Initiated Abort | |
499 | * 13 Protocol Violation | |
500 | */ | |
501 | ||
f3a7c66b HH |
502 | SCTP_ERROR_RESTART = cpu_to_be16(0x0b), |
503 | SCTP_ERROR_USER_ABORT = cpu_to_be16(0x0c), | |
504 | SCTP_ERROR_PROTO_VIOLATION = cpu_to_be16(0x0d), | |
1da177e4 LT |
505 | |
506 | /* ADDIP Section 3.3 New Error Causes | |
507 | * | |
508 | * Four new Error Causes are added to the SCTP Operational Errors, | |
509 | * primarily for use in the ASCONF-ACK chunk. | |
510 | * | |
511 | * Value Cause Code | |
512 | * --------- ---------------- | |
a84db794 WY |
513 | * 0x00A0 Request to Delete Last Remaining IP Address. |
514 | * 0x00A1 Operation Refused Due to Resource Shortage. | |
515 | * 0x00A2 Request to Delete Source IP Address. | |
516 | * 0x00A3 Association Aborted due to illegal ASCONF-ACK | |
517 | * 0x00A4 Request refused - no authorization. | |
1da177e4 | 518 | */ |
a84db794 WY |
519 | SCTP_ERROR_DEL_LAST_IP = cpu_to_be16(0x00A0), |
520 | SCTP_ERROR_RSRC_LOW = cpu_to_be16(0x00A1), | |
521 | SCTP_ERROR_DEL_SRC_IP = cpu_to_be16(0x00A2), | |
522 | SCTP_ERROR_ASCONF_ACK = cpu_to_be16(0x00A3), | |
523 | SCTP_ERROR_REQ_REFUSED = cpu_to_be16(0x00A4), | |
f7b0e93b VY |
524 | |
525 | /* AUTH Section 4. New Error Cause | |
526 | * | |
527 | * This section defines a new error cause that will be sent if an AUTH | |
528 | * chunk is received with an unsupported HMAC identifier. | |
529 | * illustrates the new error cause. | |
530 | * | |
531 | * Cause Code Error Cause Name | |
532 | * -------------------------------------------------------------- | |
533 | * 0x0105 Unsupported HMAC Identifier | |
534 | */ | |
f3a7c66b | 535 | SCTP_ERROR_UNSUP_HMAC = cpu_to_be16(0x0105) |
2a493216 | 536 | }; |
1da177e4 LT |
537 | |
538 | ||
539 | ||
540 | /* RFC 2960. Appendix A. Explicit Congestion Notification. | |
541 | * Explicit Congestion Notification Echo (ECNE) (12) | |
542 | */ | |
1fb6d83b | 543 | struct sctp_ecnehdr { |
f3ffaf14 | 544 | __be32 lowest_tsn; |
1fb6d83b | 545 | }; |
1da177e4 | 546 | |
b515fd27 | 547 | struct sctp_ecne_chunk { |
922dbc5b | 548 | struct sctp_chunkhdr chunk_hdr; |
1fb6d83b | 549 | struct sctp_ecnehdr ence_hdr; |
b515fd27 | 550 | }; |
1da177e4 LT |
551 | |
552 | /* RFC 2960. Appendix A. Explicit Congestion Notification. | |
553 | * Congestion Window Reduced (CWR) (13) | |
554 | */ | |
65f77105 | 555 | struct sctp_cwrhdr { |
f3ffaf14 | 556 | __be32 lowest_tsn; |
65f77105 | 557 | }; |
1da177e4 | 558 | |
1da177e4 LT |
559 | /* PR-SCTP |
560 | * 3.2 Forward Cumulative TSN Chunk Definition (FORWARD TSN) | |
561 | * | |
562 | * Forward Cumulative TSN chunk has the following format: | |
563 | * | |
564 | * 0 1 2 3 | |
565 | * 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 | |
566 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
567 | * | Type = 192 | Flags = 0x00 | Length = Variable | | |
568 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
569 | * | New Cumulative TSN | | |
570 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
571 | * | Stream-1 | Stream Sequence-1 | | |
572 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
573 | * \ / | |
574 | * / \ | |
575 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
576 | * | Stream-N | Stream Sequence-N | | |
577 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
578 | * | |
579 | * Chunk Flags: | |
580 | * | |
581 | * Set to all zeros on transmit and ignored on receipt. | |
582 | * | |
583 | * New Cumulative TSN: 32 bit u_int | |
584 | * | |
585 | * This indicates the new cumulative TSN to the data receiver. Upon | |
586 | * the reception of this value, the data receiver MUST consider | |
587 | * any missing TSNs earlier than or equal to this value as received | |
588 | * and stop reporting them as gaps in any subsequent SACKs. | |
589 | * | |
590 | * Stream-N: 16 bit u_int | |
591 | * | |
592 | * This field holds a stream number that was skipped by this | |
593 | * FWD-TSN. | |
594 | * | |
595 | * Stream Sequence-N: 16 bit u_int | |
596 | * This field holds the sequence number associated with the stream | |
597 | * that was skipped. The stream sequence field holds the largest stream | |
598 | * sequence number in this stream being skipped. The receiver of | |
599 | * the FWD-TSN's can use the Stream-N and Stream Sequence-N fields | |
600 | * to enable delivery of any stranded TSN's that remain on the stream | |
601 | * re-ordering queues. This field MUST NOT report TSN's corresponding | |
602 | * to DATA chunk that are marked as unordered. For ordered DATA | |
603 | * chunks this field MUST be filled in. | |
604 | */ | |
605 | struct sctp_fwdtsn_skip { | |
f3ffaf14 AV |
606 | __be16 stream; |
607 | __be16 ssn; | |
85c727b5 | 608 | }; |
1da177e4 LT |
609 | |
610 | struct sctp_fwdtsn_hdr { | |
f3ffaf14 | 611 | __be32 new_cum_tsn; |
1da177e4 | 612 | struct sctp_fwdtsn_skip skip[0]; |
85c727b5 | 613 | }; |
1da177e4 LT |
614 | |
615 | struct sctp_fwdtsn_chunk { | |
616 | struct sctp_chunkhdr chunk_hdr; | |
617 | struct sctp_fwdtsn_hdr fwdtsn_hdr; | |
85c727b5 | 618 | }; |
1da177e4 | 619 | |
2d07a49a XL |
620 | struct sctp_ifwdtsn_skip { |
621 | __be16 stream; | |
622 | __u8 reserved; | |
623 | __u8 flags; | |
624 | __be32 mid; | |
625 | }; | |
626 | ||
627 | struct sctp_ifwdtsn_hdr { | |
628 | __be32 new_cum_tsn; | |
629 | struct sctp_ifwdtsn_skip skip[0]; | |
630 | }; | |
631 | ||
632 | struct sctp_ifwdtsn_chunk { | |
633 | struct sctp_chunkhdr chunk_hdr; | |
634 | struct sctp_ifwdtsn_hdr fwdtsn_hdr; | |
635 | }; | |
1da177e4 LT |
636 | |
637 | /* ADDIP | |
638 | * Section 3.1.1 Address Configuration Change Chunk (ASCONF) | |
639 | * | |
640 | * Serial Number: 32 bits (unsigned integer) | |
641 | * This value represents a Serial Number for the ASCONF Chunk. The | |
642 | * valid range of Serial Number is from 0 to 2^32-1. | |
643 | * Serial Numbers wrap back to 0 after reaching 2^32 -1. | |
644 | * | |
645 | * Address Parameter: 8 or 20 bytes (depending on type) | |
646 | * The address is an address of the sender of the ASCONF chunk, | |
647 | * the address MUST be considered part of the association by the | |
648 | * peer endpoint. This field may be used by the receiver of the | |
649 | * ASCONF to help in finding the association. This parameter MUST | |
650 | * be present in every ASCONF message i.e. it is a mandatory TLV | |
651 | * parameter. | |
652 | * | |
653 | * ASCONF Parameter: TLV format | |
654 | * Each Address configuration change is represented by a TLV | |
655 | * parameter as defined in Section 3.2. One or more requests may | |
656 | * be present in an ASCONF Chunk. | |
657 | * | |
658 | * Section 3.1.2 Address Configuration Acknowledgement Chunk (ASCONF-ACK) | |
659 | * | |
660 | * Serial Number: 32 bits (unsigned integer) | |
661 | * This value represents the Serial Number for the received ASCONF | |
662 | * Chunk that is acknowledged by this chunk. This value is copied | |
663 | * from the received ASCONF Chunk. | |
664 | * | |
665 | * ASCONF Parameter Response: TLV format | |
666 | * The ASCONF Parameter Response is used in the ASCONF-ACK to | |
667 | * report status of ASCONF processing. | |
668 | */ | |
8b32f234 XL |
669 | struct sctp_addip_param { |
670 | struct sctp_paramhdr param_hdr; | |
671 | __be32 crr_id; | |
672 | }; | |
1da177e4 | 673 | |
65205cc4 | 674 | struct sctp_addiphdr { |
f3ffaf14 | 675 | __be32 serial; |
1da177e4 | 676 | __u8 params[0]; |
65205cc4 | 677 | }; |
1da177e4 | 678 | |
68d75469 | 679 | struct sctp_addip_chunk { |
922dbc5b | 680 | struct sctp_chunkhdr chunk_hdr; |
65205cc4 | 681 | struct sctp_addiphdr addip_hdr; |
68d75469 | 682 | }; |
1da177e4 | 683 | |
f7b0e93b VY |
684 | /* AUTH |
685 | * Section 4.1 Authentication Chunk (AUTH) | |
686 | * | |
687 | * This chunk is used to hold the result of the HMAC calculation. | |
688 | * | |
689 | * 0 1 2 3 | |
690 | * 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 | |
691 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
692 | * | Type = 0x0F | Flags=0 | Length | | |
693 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
694 | * | Shared Key Identifier | HMAC Identifier | | |
695 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
696 | * | | | |
697 | * \ HMAC / | |
698 | * / \ | |
699 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
700 | * | |
701 | * Type: 1 byte (unsigned integer) | |
702 | * This value MUST be set to 0x0F for all AUTH-chunks. | |
703 | * | |
704 | * Flags: 1 byte (unsigned integer) | |
705 | * Set to zero on transmit and ignored on receipt. | |
706 | * | |
707 | * Length: 2 bytes (unsigned integer) | |
708 | * This value holds the length of the HMAC in bytes plus 8. | |
709 | * | |
710 | * Shared Key Identifier: 2 bytes (unsigned integer) | |
711 | * This value describes which endpoint pair shared key is used. | |
712 | * | |
713 | * HMAC Identifier: 2 bytes (unsigned integer) | |
714 | * This value describes which message digest is being used. Table 2 | |
715 | * shows the currently defined values. | |
716 | * | |
717 | * The following Table 2 shows the currently defined values for HMAC | |
718 | * identifiers. | |
719 | * | |
720 | * +-----------------+--------------------------+ | |
721 | * | HMAC Identifier | Message Digest Algorithm | | |
722 | * +-----------------+--------------------------+ | |
723 | * | 0 | Reserved | | |
724 | * | 1 | SHA-1 defined in [8] | | |
725 | * | 2 | Reserved | | |
726 | * | 3 | SHA-256 defined in [8] | | |
727 | * +-----------------+--------------------------+ | |
728 | * | |
729 | * | |
730 | * HMAC: n bytes (unsigned integer) This hold the result of the HMAC | |
731 | * calculation. | |
732 | */ | |
96f7ef4d | 733 | struct sctp_authhdr { |
f7b0e93b VY |
734 | __be16 shkey_id; |
735 | __be16 hmac_id; | |
736 | __u8 hmac[0]; | |
96f7ef4d | 737 | }; |
f7b0e93b | 738 | |
bb96dec7 | 739 | struct sctp_auth_chunk { |
922dbc5b | 740 | struct sctp_chunkhdr chunk_hdr; |
96f7ef4d | 741 | struct sctp_authhdr auth_hdr; |
bb96dec7 | 742 | }; |
f7b0e93b | 743 | |
52c52a61 XL |
744 | struct sctp_infox { |
745 | struct sctp_info *sctpinfo; | |
746 | struct sctp_association *asoc; | |
747 | }; | |
748 | ||
cc16f00f | 749 | struct sctp_reconf_chunk { |
922dbc5b | 750 | struct sctp_chunkhdr chunk_hdr; |
cc16f00f | 751 | __u8 params[0]; |
9faf1c0f | 752 | }; |
cc16f00f XL |
753 | |
754 | struct sctp_strreset_outreq { | |
3c918704 | 755 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
756 | __be32 request_seq; |
757 | __be32 response_seq; | |
758 | __be32 send_reset_at_tsn; | |
759 | __be16 list_of_streams[0]; | |
9faf1c0f | 760 | }; |
cc16f00f XL |
761 | |
762 | struct sctp_strreset_inreq { | |
3c918704 | 763 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
764 | __be32 request_seq; |
765 | __be16 list_of_streams[0]; | |
9faf1c0f | 766 | }; |
cc16f00f | 767 | |
c56480a1 | 768 | struct sctp_strreset_tsnreq { |
3c918704 | 769 | struct sctp_paramhdr param_hdr; |
1da4fc97 | 770 | __be32 request_seq; |
c56480a1 XL |
771 | }; |
772 | ||
78098117 | 773 | struct sctp_strreset_addstrm { |
3c918704 | 774 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
775 | __be32 request_seq; |
776 | __be16 number_of_streams; | |
777 | __be16 reserved; | |
78098117 XL |
778 | }; |
779 | ||
bd4b9f8b XL |
780 | enum { |
781 | SCTP_STRRESET_NOTHING_TO_DO = 0x00, | |
782 | SCTP_STRRESET_PERFORMED = 0x01, | |
783 | SCTP_STRRESET_DENIED = 0x02, | |
784 | SCTP_STRRESET_ERR_WRONG_SSN = 0x03, | |
785 | SCTP_STRRESET_ERR_IN_PROGRESS = 0x04, | |
786 | SCTP_STRRESET_ERR_BAD_SEQNO = 0x05, | |
787 | SCTP_STRRESET_IN_PROGRESS = 0x06, | |
788 | }; | |
789 | ||
790 | struct sctp_strreset_resp { | |
3c918704 | 791 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
792 | __be32 response_seq; |
793 | __be32 result; | |
bd4b9f8b XL |
794 | }; |
795 | ||
796 | struct sctp_strreset_resptsn { | |
3c918704 | 797 | struct sctp_paramhdr param_hdr; |
1da4fc97 XL |
798 | __be32 response_seq; |
799 | __be32 result; | |
800 | __be32 senders_next_tsn; | |
801 | __be32 receivers_next_tsn; | |
bd4b9f8b XL |
802 | }; |
803 | ||
1da177e4 | 804 | #endif /* __LINUX_SCTP_H__ */ |