1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef _NETINET_SCTP_HEADER_H_ 39 #define _NETINET_SCTP_HEADER_H_ 40 41 #include <sys/time.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_constants.h> 44 45 #define SCTP_PACKED __attribute__((packed)) 46 47 /* 48 * Parameter structures 49 */ 50 struct sctp_ipv4addr_param { 51 struct sctp_paramhdr ph; /* type=SCTP_IPV4_PARAM_TYPE, len=8 */ 52 uint32_t addr; /* IPV4 address */ 53 } SCTP_PACKED; 54 55 #define SCTP_V6_ADDR_BYTES 16 56 57 struct sctp_ipv6addr_param { 58 struct sctp_paramhdr ph; /* type=SCTP_IPV6_PARAM_TYPE, len=20 */ 59 uint8_t addr[SCTP_V6_ADDR_BYTES]; /* IPV6 address */ 60 } SCTP_PACKED; 61 62 /* Cookie Preservative */ 63 struct sctp_cookie_perserve_param { 64 struct sctp_paramhdr ph; /* type=SCTP_COOKIE_PRESERVE, len=8 */ 65 uint32_t time; /* time in ms to extend cookie */ 66 } SCTP_PACKED; 67 68 #define SCTP_ARRAY_MIN_LEN 1 69 /* Host Name Address */ 70 struct sctp_host_name_param { 71 struct sctp_paramhdr ph; /* type=SCTP_HOSTNAME_ADDRESS */ 72 char name[SCTP_ARRAY_MIN_LEN]; /* host name */ 73 } SCTP_PACKED; 74 75 /* 76 * This is the maximum padded size of a s-a-p 77 * so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12 78 */ 79 #define SCTP_MAX_ADDR_PARAMS_SIZE 12 80 /* supported address type */ 81 struct sctp_supported_addr_param { 82 struct sctp_paramhdr ph; /* type=SCTP_SUPPORTED_ADDRTYPE */ 83 uint16_t addr_type[2]; /* array of supported address types */ 84 } SCTP_PACKED; 85 86 /* heartbeat info parameter */ 87 struct sctp_heartbeat_info_param { 88 struct sctp_paramhdr ph; 89 uint32_t time_value_1; 90 uint32_t time_value_2; 91 uint32_t random_value1; 92 uint32_t random_value2; 93 uint8_t addr_family; 94 uint8_t addr_len; 95 /* make sure that this structure is 4 byte aligned */ 96 uint8_t padding[2]; 97 char address[SCTP_ADDRMAX]; 98 } SCTP_PACKED; 99 100 /* draft-ietf-tsvwg-prsctp */ 101 /* PR-SCTP supported parameter */ 102 struct sctp_prsctp_supported_param { 103 struct sctp_paramhdr ph; 104 } SCTP_PACKED; 105 106 /* draft-ietf-tsvwg-addip-sctp */ 107 struct sctp_asconf_paramhdr { /* an ASCONF "parameter" */ 108 struct sctp_paramhdr ph; /* a SCTP parameter header */ 109 uint32_t correlation_id; /* correlation id for this param */ 110 } SCTP_PACKED; 111 112 struct sctp_asconf_addr_param { /* an ASCONF address parameter */ 113 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */ 114 struct sctp_ipv6addr_param addrp; /* max storage size */ 115 } SCTP_PACKED; 116 117 struct sctp_asconf_tag_param { /* an ASCONF NAT-Vtag parameter */ 118 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */ 119 uint32_t local_vtag; 120 uint32_t remote_vtag; 121 } SCTP_PACKED; 122 123 struct sctp_asconf_addrv4_param { /* an ASCONF address (v4) parameter */ 124 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */ 125 struct sctp_ipv4addr_param addrp; /* max storage size */ 126 } SCTP_PACKED; 127 128 #define SCTP_MAX_SUPPORTED_EXT 256 129 130 struct sctp_supported_chunk_types_param { 131 struct sctp_paramhdr ph; /* type = 0x8008 len = x */ 132 uint8_t chunk_types[]; 133 } SCTP_PACKED; 134 135 /* 136 * Structures for DATA chunks 137 */ 138 struct sctp_data { 139 uint32_t tsn; 140 uint16_t sid; 141 uint16_t ssn; 142 uint32_t ppid; 143 /* user data follows */ 144 } SCTP_PACKED; 145 146 struct sctp_data_chunk { 147 struct sctp_chunkhdr ch; 148 struct sctp_data dp; 149 } SCTP_PACKED; 150 151 struct sctp_idata { 152 uint32_t tsn; 153 uint16_t sid; 154 uint16_t reserved; /* Where does the SSN go? */ 155 uint32_t mid; 156 union { 157 uint32_t ppid; 158 uint32_t fsn; /* Fragment Sequence Number */ 159 } ppid_fsn; 160 /* user data follows */ 161 } SCTP_PACKED; 162 163 struct sctp_idata_chunk { 164 struct sctp_chunkhdr ch; 165 struct sctp_idata dp; 166 } SCTP_PACKED; 167 168 /* 169 * Structures for the control chunks 170 */ 171 172 /* Initiate (INIT)/Initiate Ack (INIT ACK) */ 173 struct sctp_init { 174 uint32_t initiate_tag; /* initiate tag */ 175 uint32_t a_rwnd; /* a_rwnd */ 176 uint16_t num_outbound_streams; /* OS */ 177 uint16_t num_inbound_streams; /* MIS */ 178 uint32_t initial_tsn; /* I-TSN */ 179 /* optional param's follow */ 180 } SCTP_PACKED; 181 #define SCTP_IDENTIFICATION_SIZE 16 182 #define SCTP_ADDRESS_SIZE 4 183 #define SCTP_RESERVE_SPACE 6 184 /* state cookie header */ 185 struct sctp_state_cookie { /* this is our definition... */ 186 uint8_t identification[SCTP_IDENTIFICATION_SIZE]; /* id of who we are */ 187 struct timeval time_entered; /* the time I built cookie */ 188 uint32_t cookie_life; /* life I will award this cookie */ 189 uint32_t tie_tag_my_vtag; /* my tag in old association */ 190 191 uint32_t tie_tag_peer_vtag; /* peers tag in old association */ 192 uint32_t peers_vtag; /* peers tag in INIT (for quick ref) */ 193 194 uint32_t my_vtag; /* my tag in INIT-ACK (for quick ref) */ 195 uint32_t address[SCTP_ADDRESS_SIZE]; /* 4 ints/128 bits */ 196 uint32_t addr_type; /* address type */ 197 uint32_t laddress[SCTP_ADDRESS_SIZE]; /* my local from address */ 198 uint32_t laddr_type; /* my local from address type */ 199 uint32_t scope_id; /* v6 scope id for link-locals */ 200 201 uint16_t peerport; /* port address of the peer in the INIT */ 202 uint16_t myport; /* my port address used in the INIT */ 203 uint8_t ipv4_addr_legal; /* Are V4 addr legal? */ 204 uint8_t ipv6_addr_legal; /* Are V6 addr legal? */ 205 uint8_t local_scope; /* IPv6 local scope flag */ 206 uint8_t site_scope; /* IPv6 site scope flag */ 207 208 uint8_t ipv4_scope; /* IPv4 private addr scope */ 209 uint8_t loopback_scope; /* loopback scope information */ 210 uint8_t reserved[SCTP_RESERVE_SPACE]; /* Align to 64 bits */ 211 /* 212 * at the end is tacked on the INIT chunk and the INIT-ACK chunk 213 * (minus the cookie). 214 */ 215 } SCTP_PACKED; 216 217 /* state cookie parameter */ 218 struct sctp_state_cookie_param { 219 struct sctp_paramhdr ph; 220 struct sctp_state_cookie cookie; 221 } SCTP_PACKED; 222 223 struct sctp_init_chunk { 224 struct sctp_chunkhdr ch; 225 struct sctp_init init; 226 } SCTP_PACKED; 227 228 struct sctp_init_msg { 229 struct sctphdr sh; 230 struct sctp_init_chunk msg; 231 } SCTP_PACKED; 232 233 /* ... used for both INIT and INIT ACK */ 234 #define sctp_init_ack sctp_init 235 #define sctp_init_ack_chunk sctp_init_chunk 236 #define sctp_init_ack_msg sctp_init_msg 237 238 /* Selective Ack (SACK) */ 239 struct sctp_gap_ack_block { 240 uint16_t start; /* Gap Ack block start */ 241 uint16_t end; /* Gap Ack block end */ 242 } SCTP_PACKED; 243 244 struct sctp_sack { 245 uint32_t cum_tsn_ack; /* cumulative TSN Ack */ 246 uint32_t a_rwnd; /* updated a_rwnd of sender */ 247 uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */ 248 uint16_t num_dup_tsns; /* number of duplicate TSNs */ 249 /* struct sctp_gap_ack_block's follow */ 250 /* uint32_t duplicate_tsn's follow */ 251 } SCTP_PACKED; 252 253 struct sctp_sack_chunk { 254 struct sctp_chunkhdr ch; 255 struct sctp_sack sack; 256 } SCTP_PACKED; 257 258 struct sctp_nr_sack { 259 uint32_t cum_tsn_ack; /* cumulative TSN Ack */ 260 uint32_t a_rwnd; /* updated a_rwnd of sender */ 261 uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */ 262 uint16_t num_nr_gap_ack_blks; /* number of NR Gap Ack blocks */ 263 uint16_t num_dup_tsns; /* number of duplicate TSNs */ 264 uint16_t reserved; /* not currently used */ 265 /* struct sctp_gap_ack_block's follow */ 266 /* uint32_t duplicate_tsn's follow */ 267 } SCTP_PACKED; 268 269 struct sctp_nr_sack_chunk { 270 struct sctp_chunkhdr ch; 271 struct sctp_nr_sack nr_sack; 272 } SCTP_PACKED; 273 274 /* Heartbeat Request (HEARTBEAT) */ 275 struct sctp_heartbeat { 276 struct sctp_heartbeat_info_param hb_info; 277 } SCTP_PACKED; 278 279 struct sctp_heartbeat_chunk { 280 struct sctp_chunkhdr ch; 281 struct sctp_heartbeat heartbeat; 282 } SCTP_PACKED; 283 284 /* ... used for Heartbeat Ack (HEARTBEAT ACK) */ 285 #define sctp_heartbeat_ack sctp_heartbeat 286 #define sctp_heartbeat_ack_chunk sctp_heartbeat_chunk 287 288 /* Abort Asssociation (ABORT) */ 289 struct sctp_abort_chunk { 290 struct sctp_chunkhdr ch; 291 /* optional error cause may follow */ 292 } SCTP_PACKED; 293 294 struct sctp_abort_msg { 295 struct sctphdr sh; 296 struct sctp_abort_chunk msg; 297 } SCTP_PACKED; 298 299 /* Shutdown Association (SHUTDOWN) */ 300 struct sctp_shutdown_chunk { 301 struct sctp_chunkhdr ch; 302 uint32_t cumulative_tsn_ack; 303 } SCTP_PACKED; 304 305 /* Shutdown Acknowledgment (SHUTDOWN ACK) */ 306 struct sctp_shutdown_ack_chunk { 307 struct sctp_chunkhdr ch; 308 } SCTP_PACKED; 309 310 /* Operation Error (ERROR) */ 311 struct sctp_error_chunk { 312 struct sctp_chunkhdr ch; 313 /* optional error causes follow */ 314 } SCTP_PACKED; 315 316 /* Cookie Echo (COOKIE ECHO) */ 317 struct sctp_cookie_echo_chunk { 318 struct sctp_chunkhdr ch; 319 struct sctp_state_cookie cookie; 320 } SCTP_PACKED; 321 322 /* Cookie Acknowledgment (COOKIE ACK) */ 323 struct sctp_cookie_ack_chunk { 324 struct sctp_chunkhdr ch; 325 } SCTP_PACKED; 326 327 /* Explicit Congestion Notification Echo (ECNE) */ 328 struct old_sctp_ecne_chunk { 329 struct sctp_chunkhdr ch; 330 uint32_t tsn; 331 } SCTP_PACKED; 332 333 struct sctp_ecne_chunk { 334 struct sctp_chunkhdr ch; 335 uint32_t tsn; 336 uint32_t num_pkts_since_cwr; 337 } SCTP_PACKED; 338 339 /* Congestion Window Reduced (CWR) */ 340 struct sctp_cwr_chunk { 341 struct sctp_chunkhdr ch; 342 uint32_t tsn; 343 } SCTP_PACKED; 344 345 /* Shutdown Complete (SHUTDOWN COMPLETE) */ 346 struct sctp_shutdown_complete_chunk { 347 struct sctp_chunkhdr ch; 348 } SCTP_PACKED; 349 350 struct sctp_adaptation_layer_indication { 351 struct sctp_paramhdr ph; 352 uint32_t indication; 353 } SCTP_PACKED; 354 355 /* 356 * draft-ietf-tsvwg-addip-sctp 357 */ 358 /* Address/Stream Configuration Change (ASCONF) */ 359 struct sctp_asconf_chunk { 360 struct sctp_chunkhdr ch; 361 uint32_t serial_number; 362 /* lookup address parameter (mandatory) */ 363 /* asconf parameters follow */ 364 } SCTP_PACKED; 365 366 /* Address/Stream Configuration Acknowledge (ASCONF ACK) */ 367 struct sctp_asconf_ack_chunk { 368 struct sctp_chunkhdr ch; 369 uint32_t serial_number; 370 /* asconf parameters follow */ 371 } SCTP_PACKED; 372 373 /* draft-ietf-tsvwg-prsctp */ 374 /* Forward Cumulative TSN (FORWARD TSN) */ 375 struct sctp_forward_tsn_chunk { 376 struct sctp_chunkhdr ch; 377 uint32_t new_cumulative_tsn; 378 /* stream/sequence pairs (sctp_strseq) follow */ 379 } SCTP_PACKED; 380 381 struct sctp_strseq { 382 uint16_t sid; 383 uint16_t ssn; 384 } SCTP_PACKED; 385 386 struct sctp_strseq_mid { 387 uint16_t sid; 388 uint16_t flags; 389 uint32_t mid; 390 }; 391 392 struct sctp_forward_tsn_msg { 393 struct sctphdr sh; 394 struct sctp_forward_tsn_chunk msg; 395 } SCTP_PACKED; 396 397 /* should be a multiple of 4 - 1 aka 3/7/11 etc. */ 398 399 #define SCTP_NUM_DB_TO_VERIFY 31 400 401 struct sctp_chunk_desc { 402 uint8_t chunk_type; 403 uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY]; 404 uint32_t tsn_ifany; 405 } SCTP_PACKED; 406 407 struct sctp_pktdrop_chunk { 408 struct sctp_chunkhdr ch; 409 uint32_t bottle_bw; 410 uint32_t current_onq; 411 uint16_t trunc_len; 412 uint16_t reserved; 413 uint8_t data[]; 414 } SCTP_PACKED; 415 416 /**********STREAM RESET STUFF ******************/ 417 418 struct sctp_stream_reset_request { 419 struct sctp_paramhdr ph; 420 uint32_t request_seq; 421 } SCTP_PACKED; 422 423 struct sctp_stream_reset_out_request { 424 struct sctp_paramhdr ph; 425 uint32_t request_seq; /* monotonically increasing seq no */ 426 uint32_t response_seq; /* if a response, the resp seq no */ 427 uint32_t send_reset_at_tsn; /* last TSN I assigned outbound */ 428 uint16_t list_of_streams[]; /* if not all list of streams */ 429 } SCTP_PACKED; 430 431 struct sctp_stream_reset_in_request { 432 struct sctp_paramhdr ph; 433 uint32_t request_seq; 434 uint16_t list_of_streams[]; /* if not all list of streams */ 435 } SCTP_PACKED; 436 437 struct sctp_stream_reset_tsn_request { 438 struct sctp_paramhdr ph; 439 uint32_t request_seq; 440 } SCTP_PACKED; 441 442 struct sctp_stream_reset_response { 443 struct sctp_paramhdr ph; 444 uint32_t response_seq; /* if a response, the resp seq no */ 445 uint32_t result; 446 } SCTP_PACKED; 447 448 struct sctp_stream_reset_response_tsn { 449 struct sctp_paramhdr ph; 450 uint32_t response_seq; /* if a response, the resp seq no */ 451 uint32_t result; 452 uint32_t senders_next_tsn; 453 uint32_t receivers_next_tsn; 454 } SCTP_PACKED; 455 456 struct sctp_stream_reset_add_strm { 457 struct sctp_paramhdr ph; 458 uint32_t request_seq; 459 uint16_t number_of_streams; 460 uint16_t reserved; 461 } SCTP_PACKED; 462 463 #define SCTP_STREAM_RESET_RESULT_NOTHING_TO_DO 0x00000000 /* XXX: unused */ 464 #define SCTP_STREAM_RESET_RESULT_PERFORMED 0x00000001 465 #define SCTP_STREAM_RESET_RESULT_DENIED 0x00000002 466 #define SCTP_STREAM_RESET_RESULT_ERR__WRONG_SSN 0x00000003 /* XXX: unused */ 467 #define SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS 0x00000004 468 #define SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO 0x00000005 469 #define SCTP_STREAM_RESET_RESULT_IN_PROGRESS 0x00000006 /* XXX: unused */ 470 471 /* 472 * convience structures, note that if you are making a request for specific 473 * streams then the request will need to be an overlay structure. 474 */ 475 476 struct sctp_stream_reset_tsn_req { 477 struct sctp_chunkhdr ch; 478 struct sctp_stream_reset_tsn_request sr_req; 479 } SCTP_PACKED; 480 481 struct sctp_stream_reset_resp { 482 struct sctp_chunkhdr ch; 483 struct sctp_stream_reset_response sr_resp; 484 } SCTP_PACKED; 485 486 /* respone only valid with a TSN request */ 487 struct sctp_stream_reset_resp_tsn { 488 struct sctp_chunkhdr ch; 489 struct sctp_stream_reset_response_tsn sr_resp; 490 } SCTP_PACKED; 491 492 /****************************************************/ 493 494 /* 495 * Authenticated chunks support draft-ietf-tsvwg-sctp-auth 496 */ 497 498 /* Should we make the max be 32? */ 499 #define SCTP_RANDOM_MAX_SIZE 256 500 struct sctp_auth_random { 501 struct sctp_paramhdr ph; /* type = 0x8002 */ 502 uint8_t random_data[]; 503 } SCTP_PACKED; 504 505 struct sctp_auth_chunk_list { 506 struct sctp_paramhdr ph; /* type = 0x8003 */ 507 uint8_t chunk_types[]; 508 } SCTP_PACKED; 509 510 struct sctp_auth_hmac_algo { 511 struct sctp_paramhdr ph; /* type = 0x8004 */ 512 uint16_t hmac_ids[]; 513 } SCTP_PACKED; 514 515 struct sctp_auth_chunk { 516 struct sctp_chunkhdr ch; 517 uint16_t shared_key_id; 518 uint16_t hmac_id; 519 uint8_t hmac[]; 520 } SCTP_PACKED; 521 522 /* 523 * we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing 524 * pieces. If ENCE is missing we could have a couple of blocks. This way we 525 * optimize so we MOST likely can bundle a SACK/ECN with the smallest size 526 * data chunk I will split into. We could increase throughput slightly by 527 * taking out these two but the 24-sack/8-CWR i.e. 32 bytes I pre-reserve I 528 * feel is worth it for now. 529 */ 530 #ifndef SCTP_MAX_OVERHEAD 531 #ifdef INET6 532 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \ 533 sizeof(struct sctphdr) + \ 534 sizeof(struct sctp_ecne_chunk) + \ 535 sizeof(struct sctp_sack_chunk) + \ 536 sizeof(struct ip6_hdr)) 537 538 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \ 539 sizeof(struct sctphdr) + \ 540 sizeof(struct ip6_hdr)) 541 542 #define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \ 543 sizeof(struct sctphdr)) 544 545 #else 546 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \ 547 sizeof(struct sctphdr) + \ 548 sizeof(struct sctp_ecne_chunk) + \ 549 sizeof(struct sctp_sack_chunk) + \ 550 sizeof(struct ip)) 551 552 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \ 553 sizeof(struct sctphdr) + \ 554 sizeof(struct ip)) 555 556 #define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \ 557 sizeof(struct sctphdr)) 558 559 #endif /* INET6 */ 560 #endif /* !SCTP_MAX_OVERHEAD */ 561 562 #define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \ 563 sizeof(struct sctphdr) + \ 564 sizeof(struct ip)) 565 566 #define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \ 567 sizeof(struct sctphdr)) 568 569 #undef SCTP_PACKED 570 #endif /* !__sctp_header_h__ */ 571