2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
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33 /* $KAME: sctp_header.h,v 1.14 2005/03/06 16:04:17 itojun Exp $ */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #ifndef __sctp_header_h__
39 #define __sctp_header_h__
42 #include <netinet/sctp.h>
43 #include <netinet/sctp_constants.h>
45 #define SCTP_PACKED __attribute__((packed))
48 * Parameter structures
50 struct sctp_ipv4addr_param {
51 struct sctp_paramhdr ph;/* type=SCTP_IPV4_PARAM_TYPE, len=8 */
52 uint32_t addr; /* IPV4 address */
55 #define SCTP_V6_ADDR_BYTES 16
58 struct sctp_ipv6addr_param {
59 struct sctp_paramhdr ph;/* type=SCTP_IPV6_PARAM_TYPE, len=20 */
60 uint8_t addr[SCTP_V6_ADDR_BYTES]; /* IPV6 address */
63 /* Cookie Preservative */
64 struct sctp_cookie_perserve_param {
65 struct sctp_paramhdr ph;/* type=SCTP_COOKIE_PRESERVE, len=8 */
66 uint32_t time; /* time in ms to extend cookie */
69 #define SCTP_ARRAY_MIN_LEN 1
70 /* Host Name Address */
71 struct sctp_host_name_param {
72 struct sctp_paramhdr ph;/* type=SCTP_HOSTNAME_ADDRESS */
73 char name[SCTP_ARRAY_MIN_LEN]; /* host name */
77 * This is the maximum padded size of a s-a-p
78 * so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12
80 #define SCTP_MAX_ADDR_PARAMS_SIZE 12
81 /* supported address type */
82 struct sctp_supported_addr_param {
83 struct sctp_paramhdr ph;/* type=SCTP_SUPPORTED_ADDRTYPE */
84 uint16_t addr_type[SCTP_ARRAY_MIN_LEN]; /* array of supported address
89 struct sctp_ecn_supported_param {
90 struct sctp_paramhdr ph;/* type=SCTP_ECN_CAPABLE */
94 /* heartbeat info parameter */
95 struct sctp_heartbeat_info_param {
96 struct sctp_paramhdr ph;
97 uint32_t time_value_1;
98 uint32_t time_value_2;
99 uint32_t random_value1;
100 uint32_t random_value2;
103 /* make sure that this structure is 4 byte aligned */
105 char address[SCTP_ADDRMAX];
109 /* draft-ietf-tsvwg-prsctp */
110 /* PR-SCTP supported parameter */
111 struct sctp_prsctp_supported_param {
112 struct sctp_paramhdr ph;
116 /* draft-ietf-tsvwg-addip-sctp */
117 struct sctp_asconf_paramhdr { /* an ASCONF "parameter" */
118 struct sctp_paramhdr ph;/* a SCTP parameter header */
119 uint32_t correlation_id;/* correlation id for this param */
122 struct sctp_asconf_addr_param { /* an ASCONF address parameter */
123 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
124 struct sctp_ipv6addr_param addrp; /* max storage size */
128 struct sctp_asconf_tag_param { /* an ASCONF NAT-Vtag parameter */
129 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
131 uint32_t remote_vtag;
135 struct sctp_asconf_addrv4_param { /* an ASCONF address (v4) parameter */
136 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
137 struct sctp_ipv4addr_param addrp; /* max storage size */
140 #define SCTP_MAX_SUPPORTED_EXT 256
142 struct sctp_supported_chunk_types_param {
143 struct sctp_paramhdr ph;/* type = 0x8008 len = x */
144 uint8_t chunk_types[];
149 * Structures for DATA chunks
154 uint16_t stream_sequence;
155 uint32_t protocol_id;
156 /* user data follows */
159 struct sctp_data_chunk {
160 struct sctp_chunkhdr ch;
165 * Structures for the control chunks
168 /* Initiate (INIT)/Initiate Ack (INIT ACK) */
170 uint32_t initiate_tag; /* initiate tag */
171 uint32_t a_rwnd; /* a_rwnd */
172 uint16_t num_outbound_streams; /* OS */
173 uint16_t num_inbound_streams; /* MIS */
174 uint32_t initial_tsn; /* I-TSN */
175 /* optional param's follow */
178 #define SCTP_IDENTIFICATION_SIZE 16
179 #define SCTP_ADDRESS_SIZE 4
180 #define SCTP_RESERVE_SPACE 6
181 /* state cookie header */
182 struct sctp_state_cookie { /* this is our definition... */
183 uint8_t identification[SCTP_IDENTIFICATION_SIZE]; /* id of who we are */
184 struct timeval time_entered; /* the time I built cookie */
185 uint32_t cookie_life; /* life I will award this cookie */
186 uint32_t tie_tag_my_vtag; /* my tag in old association */
188 uint32_t tie_tag_peer_vtag; /* peers tag in old association */
189 uint32_t peers_vtag; /* peers tag in INIT (for quick ref) */
191 uint32_t my_vtag; /* my tag in INIT-ACK (for quick ref) */
192 uint32_t address[SCTP_ADDRESS_SIZE]; /* 4 ints/128 bits */
193 uint32_t addr_type; /* address type */
194 uint32_t laddress[SCTP_ADDRESS_SIZE]; /* my local from address */
195 uint32_t laddr_type; /* my local from address type */
196 uint32_t scope_id; /* v6 scope id for link-locals */
198 uint16_t peerport; /* port address of the peer in the INIT */
199 uint16_t myport; /* my port address used in the INIT */
200 uint8_t ipv4_addr_legal;/* Are V4 addr legal? */
201 uint8_t ipv6_addr_legal;/* Are V6 addr legal? */
202 uint8_t local_scope; /* IPv6 local scope flag */
203 uint8_t site_scope; /* IPv6 site scope flag */
205 uint8_t ipv4_scope; /* IPv4 private addr scope */
206 uint8_t loopback_scope; /* loopback scope information */
207 uint8_t reserved[SCTP_RESERVE_SPACE]; /* Align to 64 bits */
209 * at the end is tacked on the INIT chunk and the INIT-ACK chunk
210 * (minus the cookie).
215 /* Used for NAT state error cause */
216 struct sctp_missing_nat_state {
223 struct sctp_inv_mandatory_param {
229 * We include this to 0 it since only a missing cookie will cause
235 struct sctp_unresolv_addr {
239 uint16_t reserved; /* Only one invalid addr type */
242 /* state cookie parameter */
243 struct sctp_state_cookie_param {
244 struct sctp_paramhdr ph;
245 struct sctp_state_cookie cookie;
248 struct sctp_init_chunk {
249 struct sctp_chunkhdr ch;
250 struct sctp_init init;
253 struct sctp_init_msg {
255 struct sctp_init_chunk msg;
258 /* ... used for both INIT and INIT ACK */
259 #define sctp_init_ack sctp_init
260 #define sctp_init_ack_chunk sctp_init_chunk
261 #define sctp_init_ack_msg sctp_init_msg
264 /* Selective Ack (SACK) */
265 struct sctp_gap_ack_block {
266 uint16_t start; /* Gap Ack block start */
267 uint16_t end; /* Gap Ack block end */
271 uint32_t cum_tsn_ack; /* cumulative TSN Ack */
272 uint32_t a_rwnd; /* updated a_rwnd of sender */
273 uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
274 uint16_t num_dup_tsns; /* number of duplicate TSNs */
275 /* struct sctp_gap_ack_block's follow */
276 /* uint32_t duplicate_tsn's follow */
279 struct sctp_sack_chunk {
280 struct sctp_chunkhdr ch;
281 struct sctp_sack sack;
284 struct sctp_nr_sack {
285 uint32_t cum_tsn_ack; /* cumulative TSN Ack */
286 uint32_t a_rwnd; /* updated a_rwnd of sender */
287 uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
288 uint16_t num_nr_gap_ack_blks; /* number of NR Gap Ack blocks */
289 uint16_t num_dup_tsns; /* number of duplicate TSNs */
290 uint16_t reserved; /* not currently used */
291 /* struct sctp_gap_ack_block's follow */
292 /* uint32_t duplicate_tsn's follow */
295 struct sctp_nr_sack_chunk {
296 struct sctp_chunkhdr ch;
297 struct sctp_nr_sack nr_sack;
301 /* Heartbeat Request (HEARTBEAT) */
302 struct sctp_heartbeat {
303 struct sctp_heartbeat_info_param hb_info;
306 struct sctp_heartbeat_chunk {
307 struct sctp_chunkhdr ch;
308 struct sctp_heartbeat heartbeat;
311 /* ... used for Heartbeat Ack (HEARTBEAT ACK) */
312 #define sctp_heartbeat_ack sctp_heartbeat
313 #define sctp_heartbeat_ack_chunk sctp_heartbeat_chunk
316 /* Abort Asssociation (ABORT) */
317 struct sctp_abort_chunk {
318 struct sctp_chunkhdr ch;
319 /* optional error cause may follow */
322 struct sctp_abort_msg {
324 struct sctp_abort_chunk msg;
328 /* Shutdown Association (SHUTDOWN) */
329 struct sctp_shutdown_chunk {
330 struct sctp_chunkhdr ch;
331 uint32_t cumulative_tsn_ack;
335 /* Shutdown Acknowledgment (SHUTDOWN ACK) */
336 struct sctp_shutdown_ack_chunk {
337 struct sctp_chunkhdr ch;
341 /* Operation Error (ERROR) */
342 struct sctp_error_chunk {
343 struct sctp_chunkhdr ch;
344 /* optional error causes follow */
348 /* Cookie Echo (COOKIE ECHO) */
349 struct sctp_cookie_echo_chunk {
350 struct sctp_chunkhdr ch;
351 struct sctp_state_cookie cookie;
354 /* Cookie Acknowledgment (COOKIE ACK) */
355 struct sctp_cookie_ack_chunk {
356 struct sctp_chunkhdr ch;
359 /* Explicit Congestion Notification Echo (ECNE) */
360 struct old_sctp_ecne_chunk {
361 struct sctp_chunkhdr ch;
365 struct sctp_ecne_chunk {
366 struct sctp_chunkhdr ch;
368 uint32_t num_pkts_since_cwr;
371 /* Congestion Window Reduced (CWR) */
372 struct sctp_cwr_chunk {
373 struct sctp_chunkhdr ch;
377 /* Shutdown Complete (SHUTDOWN COMPLETE) */
378 struct sctp_shutdown_complete_chunk {
379 struct sctp_chunkhdr ch;
382 /* Oper error holding a stale cookie */
383 struct sctp_stale_cookie_msg {
384 struct sctp_paramhdr ph;/* really an error cause */
388 struct sctp_adaptation_layer_indication {
389 struct sctp_paramhdr ph;
393 struct sctp_cookie_while_shutting_down {
395 struct sctp_chunkhdr ch;
396 struct sctp_paramhdr ph;/* really an error cause */
399 struct sctp_shutdown_complete_msg {
401 struct sctp_shutdown_complete_chunk shut_cmp;
405 * draft-ietf-tsvwg-addip-sctp
407 /* Address/Stream Configuration Change (ASCONF) */
408 struct sctp_asconf_chunk {
409 struct sctp_chunkhdr ch;
410 uint32_t serial_number;
411 /* lookup address parameter (mandatory) */
412 /* asconf parameters follow */
415 /* Address/Stream Configuration Acknowledge (ASCONF ACK) */
416 struct sctp_asconf_ack_chunk {
417 struct sctp_chunkhdr ch;
418 uint32_t serial_number;
419 /* asconf parameters follow */
422 /* draft-ietf-tsvwg-prsctp */
423 /* Forward Cumulative TSN (FORWARD TSN) */
424 struct sctp_forward_tsn_chunk {
425 struct sctp_chunkhdr ch;
426 uint32_t new_cumulative_tsn;
427 /* stream/sequence pairs (sctp_strseq) follow */
435 struct sctp_forward_tsn_msg {
437 struct sctp_forward_tsn_chunk msg;
440 /* should be a multiple of 4 - 1 aka 3/7/11 etc. */
442 #define SCTP_NUM_DB_TO_VERIFY 31
444 struct sctp_chunk_desc {
446 uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
451 struct sctp_pktdrop_chunk {
452 struct sctp_chunkhdr ch;
454 uint32_t current_onq;
460 /**********STREAM RESET STUFF ******************/
462 struct sctp_stream_reset_out_request {
463 struct sctp_paramhdr ph;
464 uint32_t request_seq; /* monotonically increasing seq no */
465 uint32_t response_seq; /* if a response, the resp seq no */
466 uint32_t send_reset_at_tsn; /* last TSN I assigned outbound */
467 uint16_t list_of_streams[]; /* if not all list of streams */
470 struct sctp_stream_reset_in_request {
471 struct sctp_paramhdr ph;
472 uint32_t request_seq;
473 uint16_t list_of_streams[]; /* if not all list of streams */
477 struct sctp_stream_reset_tsn_request {
478 struct sctp_paramhdr ph;
479 uint32_t request_seq;
482 struct sctp_stream_reset_response {
483 struct sctp_paramhdr ph;
484 uint32_t response_seq; /* if a response, the resp seq no */
488 struct sctp_stream_reset_response_tsn {
489 struct sctp_paramhdr ph;
490 uint32_t response_seq; /* if a response, the resp seq no */
492 uint32_t senders_next_tsn;
493 uint32_t receivers_next_tsn;
496 struct sctp_stream_reset_add_strm {
497 struct sctp_paramhdr ph;
498 uint32_t request_seq;
499 uint16_t number_of_streams;
503 #define SCTP_STREAM_RESET_NOTHING 0x00000000 /* Nothing for me to do */
504 #define SCTP_STREAM_RESET_PERFORMED 0x00000001 /* Did it */
505 #define SCTP_STREAM_RESET_DENIED 0x00000002 /* refused to do it */
506 #define SCTP_STREAM_RESET_ERROR_STR 0x00000003 /* bad Stream no */
507 #define SCTP_STREAM_RESET_TRY_LATER 0x00000004 /* collision, try again */
508 #define SCTP_STREAM_RESET_BAD_SEQNO 0x00000005 /* bad str-reset seq no */
511 * convience structures, note that if you are making a request for specific
512 * streams then the request will need to be an overlay structure.
515 struct sctp_stream_reset_out_req {
516 struct sctp_chunkhdr ch;
517 struct sctp_stream_reset_out_request sr_req;
520 struct sctp_stream_reset_in_req {
521 struct sctp_chunkhdr ch;
522 struct sctp_stream_reset_in_request sr_req;
525 struct sctp_stream_reset_tsn_req {
526 struct sctp_chunkhdr ch;
527 struct sctp_stream_reset_tsn_request sr_req;
530 struct sctp_stream_reset_resp {
531 struct sctp_chunkhdr ch;
532 struct sctp_stream_reset_response sr_resp;
535 /* respone only valid with a TSN request */
536 struct sctp_stream_reset_resp_tsn {
537 struct sctp_chunkhdr ch;
538 struct sctp_stream_reset_response_tsn sr_resp;
541 /****************************************************/
544 * Authenticated chunks support draft-ietf-tsvwg-sctp-auth
547 /* Should we make the max be 32? */
548 #define SCTP_RANDOM_MAX_SIZE 256
549 struct sctp_auth_random {
550 struct sctp_paramhdr ph;/* type = 0x8002 */
551 uint8_t random_data[];
554 struct sctp_auth_chunk_list {
555 struct sctp_paramhdr ph;/* type = 0x8003 */
556 uint8_t chunk_types[];
559 struct sctp_auth_hmac_algo {
560 struct sctp_paramhdr ph;/* type = 0x8004 */
564 struct sctp_auth_chunk {
565 struct sctp_chunkhdr ch;
566 uint16_t shared_key_id;
571 struct sctp_auth_invalid_hmac {
572 struct sctp_paramhdr ph;
578 * we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
579 * pieces. If ENCE is missing we could have a couple of blocks. This way we
580 * optimize so we MOST likely can bundle a SACK/ECN with the smallest size
581 * data chunk I will split into. We could increase throughput slightly by
582 * taking out these two but the 24-sack/8-CWR i.e. 32 bytes I pre-reserve I
583 * feel is worth it for now.
585 #ifndef SCTP_MAX_OVERHEAD
587 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
588 sizeof(struct sctphdr) + \
589 sizeof(struct sctp_ecne_chunk) + \
590 sizeof(struct sctp_sack_chunk) + \
591 sizeof(struct ip6_hdr))
593 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
594 sizeof(struct sctphdr) + \
595 sizeof(struct ip6_hdr))
598 #define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
599 sizeof(struct sctphdr))
602 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
603 sizeof(struct sctphdr) + \
604 sizeof(struct sctp_ecne_chunk) + \
605 sizeof(struct sctp_sack_chunk) + \
608 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
609 sizeof(struct sctphdr) + \
613 #define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
614 sizeof(struct sctphdr))
617 #endif /* !SCTP_MAX_OVERHEAD */
619 #define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
620 sizeof(struct sctphdr) + \
623 #define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
624 sizeof(struct sctphdr))
627 #endif /* !__sctp_header_h__ */