1 /*-
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/8.4/sys/netinet/sctp_header.h 247989 2013-03-08 00:07:19Z tuexen $");
35
36 #ifndef _NETINET_SCTP_HEADER_H_
37 #define _NETINET_SCTP_HEADER_H_
38
39 #include <sys/time.h>
40 #include <netinet/sctp.h>
41 #include <netinet/sctp_constants.h>
42
43 #define SCTP_PACKED __attribute__((packed))
44
45 /*
46 * Parameter structures
47 */
48 struct sctp_ipv4addr_param {
49 struct sctp_paramhdr ph;/* type=SCTP_IPV4_PARAM_TYPE, len=8 */
50 uint32_t addr; /* IPV4 address */
51 } SCTP_PACKED;
52
53 #define SCTP_V6_ADDR_BYTES 16
54
55
56 struct sctp_ipv6addr_param {
57 struct sctp_paramhdr ph;/* type=SCTP_IPV6_PARAM_TYPE, len=20 */
58 uint8_t addr[SCTP_V6_ADDR_BYTES]; /* IPV6 address */
59 } SCTP_PACKED;
60
61 /* Cookie Preservative */
62 struct sctp_cookie_perserve_param {
63 struct sctp_paramhdr ph;/* type=SCTP_COOKIE_PRESERVE, len=8 */
64 uint32_t time; /* time in ms to extend cookie */
65 } SCTP_PACKED;
66
67 #define SCTP_ARRAY_MIN_LEN 1
68 /* Host Name Address */
69 struct sctp_host_name_param {
70 struct sctp_paramhdr ph;/* type=SCTP_HOSTNAME_ADDRESS */
71 char name[SCTP_ARRAY_MIN_LEN]; /* host name */
72 } SCTP_PACKED;
73
74 /*
75 * This is the maximum padded size of a s-a-p
76 * so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12
77 */
78 #define SCTP_MAX_ADDR_PARAMS_SIZE 12
79 /* supported address type */
80 struct sctp_supported_addr_param {
81 struct sctp_paramhdr ph;/* type=SCTP_SUPPORTED_ADDRTYPE */
82 uint16_t addr_type[2]; /* array of supported address types */
83 } SCTP_PACKED;
84
85 /* ECN parameter */
86 struct sctp_ecn_supported_param {
87 struct sctp_paramhdr ph;/* type=SCTP_ECN_CAPABLE */
88 } SCTP_PACKED;
89
90
91 /* heartbeat info parameter */
92 struct sctp_heartbeat_info_param {
93 struct sctp_paramhdr ph;
94 uint32_t time_value_1;
95 uint32_t time_value_2;
96 uint32_t random_value1;
97 uint32_t random_value2;
98 uint8_t addr_family;
99 uint8_t addr_len;
100 /* make sure that this structure is 4 byte aligned */
101 uint8_t padding[2];
102 char address[SCTP_ADDRMAX];
103 } SCTP_PACKED;
104
105
106 /* draft-ietf-tsvwg-prsctp */
107 /* PR-SCTP supported parameter */
108 struct sctp_prsctp_supported_param {
109 struct sctp_paramhdr ph;
110 } SCTP_PACKED;
111
112
113 /* draft-ietf-tsvwg-addip-sctp */
114 struct sctp_asconf_paramhdr { /* an ASCONF "parameter" */
115 struct sctp_paramhdr ph;/* a SCTP parameter header */
116 uint32_t correlation_id;/* correlation id for this param */
117 } SCTP_PACKED;
118
119 struct sctp_asconf_addr_param { /* an ASCONF address parameter */
120 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
121 struct sctp_ipv6addr_param addrp; /* max storage size */
122 } SCTP_PACKED;
123
124
125 struct sctp_asconf_tag_param { /* an ASCONF NAT-Vtag parameter */
126 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
127 uint32_t local_vtag;
128 uint32_t remote_vtag;
129 } SCTP_PACKED;
130
131
132 struct sctp_asconf_addrv4_param { /* an ASCONF address (v4) parameter */
133 struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
134 struct sctp_ipv4addr_param addrp; /* max storage size */
135 } SCTP_PACKED;
136
137 #define SCTP_MAX_SUPPORTED_EXT 256
138
139 struct sctp_supported_chunk_types_param {
140 struct sctp_paramhdr ph;/* type = 0x8008 len = x */
141 uint8_t chunk_types[];
142 } SCTP_PACKED;
143
144
145 /*
146 * Structures for DATA chunks
147 */
148 struct sctp_data {
149 uint32_t tsn;
150 uint16_t stream_id;
151 uint16_t stream_sequence;
152 uint32_t protocol_id;
153 /* user data follows */
154 } SCTP_PACKED;
155
156 struct sctp_data_chunk {
157 struct sctp_chunkhdr ch;
158 struct sctp_data dp;
159 } SCTP_PACKED;
160
161 /*
162 * Structures for the control chunks
163 */
164
165 /* Initiate (INIT)/Initiate Ack (INIT ACK) */
166 struct sctp_init {
167 uint32_t initiate_tag; /* initiate tag */
168 uint32_t a_rwnd; /* a_rwnd */
169 uint16_t num_outbound_streams; /* OS */
170 uint16_t num_inbound_streams; /* MIS */
171 uint32_t initial_tsn; /* I-TSN */
172 /* optional param's follow */
173 } SCTP_PACKED;
174
175 #define SCTP_IDENTIFICATION_SIZE 16
176 #define SCTP_ADDRESS_SIZE 4
177 #define SCTP_RESERVE_SPACE 6
178 /* state cookie header */
179 struct sctp_state_cookie { /* this is our definition... */
180 uint8_t identification[SCTP_IDENTIFICATION_SIZE]; /* id of who we are */
181 struct timeval time_entered; /* the time I built cookie */
182 uint32_t cookie_life; /* life I will award this cookie */
183 uint32_t tie_tag_my_vtag; /* my tag in old association */
184
185 uint32_t tie_tag_peer_vtag; /* peers tag in old association */
186 uint32_t peers_vtag; /* peers tag in INIT (for quick ref) */
187
188 uint32_t my_vtag; /* my tag in INIT-ACK (for quick ref) */
189 uint32_t address[SCTP_ADDRESS_SIZE]; /* 4 ints/128 bits */
190 uint32_t addr_type; /* address type */
191 uint32_t laddress[SCTP_ADDRESS_SIZE]; /* my local from address */
192 uint32_t laddr_type; /* my local from address type */
193 uint32_t scope_id; /* v6 scope id for link-locals */
194
195 uint16_t peerport; /* port address of the peer in the INIT */
196 uint16_t myport; /* my port address used in the INIT */
197 uint8_t ipv4_addr_legal;/* Are V4 addr legal? */
198 uint8_t ipv6_addr_legal;/* Are V6 addr legal? */
199 uint8_t local_scope; /* IPv6 local scope flag */
200 uint8_t site_scope; /* IPv6 site scope flag */
201
202 uint8_t ipv4_scope; /* IPv4 private addr scope */
203 uint8_t loopback_scope; /* loopback scope information */
204 uint8_t reserved[SCTP_RESERVE_SPACE]; /* Align to 64 bits */
205 /*
206 * at the end is tacked on the INIT chunk and the INIT-ACK chunk
207 * (minus the cookie).
208 */
209 } SCTP_PACKED;
210
211
212 /* Used for NAT state error cause */
213 struct sctp_missing_nat_state {
214 uint16_t cause;
215 uint16_t length;
216 uint8_t data[];
217 } SCTP_PACKED;
218
219
220 struct sctp_inv_mandatory_param {
221 uint16_t cause;
222 uint16_t length;
223 uint32_t num_param;
224 uint16_t param;
225 /*
226 * We include this to 0 it since only a missing cookie will cause
227 * this error.
228 */
229 uint16_t resv;
230 } SCTP_PACKED;
231
232 struct sctp_unresolv_addr {
233 uint16_t cause;
234 uint16_t length;
235 uint16_t addr_type;
236 uint16_t reserved; /* Only one invalid addr type */
237 } SCTP_PACKED;
238
239 /* state cookie parameter */
240 struct sctp_state_cookie_param {
241 struct sctp_paramhdr ph;
242 struct sctp_state_cookie cookie;
243 } SCTP_PACKED;
244
245 struct sctp_init_chunk {
246 struct sctp_chunkhdr ch;
247 struct sctp_init init;
248 } SCTP_PACKED;
249
250 struct sctp_init_msg {
251 struct sctphdr sh;
252 struct sctp_init_chunk msg;
253 } SCTP_PACKED;
254
255 /* ... used for both INIT and INIT ACK */
256 #define sctp_init_ack sctp_init
257 #define sctp_init_ack_chunk sctp_init_chunk
258 #define sctp_init_ack_msg sctp_init_msg
259
260
261 /* Selective Ack (SACK) */
262 struct sctp_gap_ack_block {
263 uint16_t start; /* Gap Ack block start */
264 uint16_t end; /* Gap Ack block end */
265 } SCTP_PACKED;
266
267 struct sctp_sack {
268 uint32_t cum_tsn_ack; /* cumulative TSN Ack */
269 uint32_t a_rwnd; /* updated a_rwnd of sender */
270 uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
271 uint16_t num_dup_tsns; /* number of duplicate TSNs */
272 /* struct sctp_gap_ack_block's follow */
273 /* uint32_t duplicate_tsn's follow */
274 } SCTP_PACKED;
275
276 struct sctp_sack_chunk {
277 struct sctp_chunkhdr ch;
278 struct sctp_sack sack;
279 } SCTP_PACKED;
280
281 struct sctp_nr_sack {
282 uint32_t cum_tsn_ack; /* cumulative TSN Ack */
283 uint32_t a_rwnd; /* updated a_rwnd of sender */
284 uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
285 uint16_t num_nr_gap_ack_blks; /* number of NR Gap Ack blocks */
286 uint16_t num_dup_tsns; /* number of duplicate TSNs */
287 uint16_t reserved; /* not currently used */
288 /* struct sctp_gap_ack_block's follow */
289 /* uint32_t duplicate_tsn's follow */
290 } SCTP_PACKED;
291
292 struct sctp_nr_sack_chunk {
293 struct sctp_chunkhdr ch;
294 struct sctp_nr_sack nr_sack;
295 } SCTP_PACKED;
296
297
298 /* Heartbeat Request (HEARTBEAT) */
299 struct sctp_heartbeat {
300 struct sctp_heartbeat_info_param hb_info;
301 } SCTP_PACKED;
302
303 struct sctp_heartbeat_chunk {
304 struct sctp_chunkhdr ch;
305 struct sctp_heartbeat heartbeat;
306 } SCTP_PACKED;
307
308 /* ... used for Heartbeat Ack (HEARTBEAT ACK) */
309 #define sctp_heartbeat_ack sctp_heartbeat
310 #define sctp_heartbeat_ack_chunk sctp_heartbeat_chunk
311
312
313 /* Abort Asssociation (ABORT) */
314 struct sctp_abort_chunk {
315 struct sctp_chunkhdr ch;
316 /* optional error cause may follow */
317 } SCTP_PACKED;
318
319 struct sctp_abort_msg {
320 struct sctphdr sh;
321 struct sctp_abort_chunk msg;
322 } SCTP_PACKED;
323
324
325 /* Shutdown Association (SHUTDOWN) */
326 struct sctp_shutdown_chunk {
327 struct sctp_chunkhdr ch;
328 uint32_t cumulative_tsn_ack;
329 } SCTP_PACKED;
330
331
332 /* Shutdown Acknowledgment (SHUTDOWN ACK) */
333 struct sctp_shutdown_ack_chunk {
334 struct sctp_chunkhdr ch;
335 } SCTP_PACKED;
336
337
338 /* Operation Error (ERROR) */
339 struct sctp_error_chunk {
340 struct sctp_chunkhdr ch;
341 /* optional error causes follow */
342 } SCTP_PACKED;
343
344
345 /* Cookie Echo (COOKIE ECHO) */
346 struct sctp_cookie_echo_chunk {
347 struct sctp_chunkhdr ch;
348 struct sctp_state_cookie cookie;
349 } SCTP_PACKED;
350
351 /* Cookie Acknowledgment (COOKIE ACK) */
352 struct sctp_cookie_ack_chunk {
353 struct sctp_chunkhdr ch;
354 } SCTP_PACKED;
355
356 /* Explicit Congestion Notification Echo (ECNE) */
357 struct old_sctp_ecne_chunk {
358 struct sctp_chunkhdr ch;
359 uint32_t tsn;
360 } SCTP_PACKED;
361
362 struct sctp_ecne_chunk {
363 struct sctp_chunkhdr ch;
364 uint32_t tsn;
365 uint32_t num_pkts_since_cwr;
366 } SCTP_PACKED;
367
368 /* Congestion Window Reduced (CWR) */
369 struct sctp_cwr_chunk {
370 struct sctp_chunkhdr ch;
371 uint32_t tsn;
372 } SCTP_PACKED;
373
374 /* Shutdown Complete (SHUTDOWN COMPLETE) */
375 struct sctp_shutdown_complete_chunk {
376 struct sctp_chunkhdr ch;
377 } SCTP_PACKED;
378
379 /* Oper error holding a stale cookie */
380 struct sctp_stale_cookie_msg {
381 struct sctp_paramhdr ph;/* really an error cause */
382 uint32_t time_usec;
383 } SCTP_PACKED;
384
385 struct sctp_adaptation_layer_indication {
386 struct sctp_paramhdr ph;
387 uint32_t indication;
388 } SCTP_PACKED;
389
390 struct sctp_cookie_while_shutting_down {
391 struct sctphdr sh;
392 struct sctp_chunkhdr ch;
393 struct sctp_paramhdr ph;/* really an error cause */
394 } SCTP_PACKED;
395
396 struct sctp_shutdown_complete_msg {
397 struct sctphdr sh;
398 struct sctp_shutdown_complete_chunk shut_cmp;
399 } SCTP_PACKED;
400
401 /*
402 * draft-ietf-tsvwg-addip-sctp
403 */
404 /* Address/Stream Configuration Change (ASCONF) */
405 struct sctp_asconf_chunk {
406 struct sctp_chunkhdr ch;
407 uint32_t serial_number;
408 /* lookup address parameter (mandatory) */
409 /* asconf parameters follow */
410 } SCTP_PACKED;
411
412 /* Address/Stream Configuration Acknowledge (ASCONF ACK) */
413 struct sctp_asconf_ack_chunk {
414 struct sctp_chunkhdr ch;
415 uint32_t serial_number;
416 /* asconf parameters follow */
417 } SCTP_PACKED;
418
419 /* draft-ietf-tsvwg-prsctp */
420 /* Forward Cumulative TSN (FORWARD TSN) */
421 struct sctp_forward_tsn_chunk {
422 struct sctp_chunkhdr ch;
423 uint32_t new_cumulative_tsn;
424 /* stream/sequence pairs (sctp_strseq) follow */
425 } SCTP_PACKED;
426
427 struct sctp_strseq {
428 uint16_t stream;
429 uint16_t sequence;
430 } SCTP_PACKED;
431
432 struct sctp_forward_tsn_msg {
433 struct sctphdr sh;
434 struct sctp_forward_tsn_chunk msg;
435 } SCTP_PACKED;
436
437 /* should be a multiple of 4 - 1 aka 3/7/11 etc. */
438
439 #define SCTP_NUM_DB_TO_VERIFY 31
440
441 struct sctp_chunk_desc {
442 uint8_t chunk_type;
443 uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
444 uint32_t tsn_ifany;
445 } SCTP_PACKED;
446
447
448 struct sctp_pktdrop_chunk {
449 struct sctp_chunkhdr ch;
450 uint32_t bottle_bw;
451 uint32_t current_onq;
452 uint16_t trunc_len;
453 uint16_t reserved;
454 uint8_t data[];
455 } SCTP_PACKED;
456
457 /**********STREAM RESET STUFF ******************/
458
459 struct sctp_stream_reset_out_request {
460 struct sctp_paramhdr ph;
461 uint32_t request_seq; /* monotonically increasing seq no */
462 uint32_t response_seq; /* if a response, the resp seq no */
463 uint32_t send_reset_at_tsn; /* last TSN I assigned outbound */
464 uint16_t list_of_streams[]; /* if not all list of streams */
465 } SCTP_PACKED;
466
467 struct sctp_stream_reset_in_request {
468 struct sctp_paramhdr ph;
469 uint32_t request_seq;
470 uint16_t list_of_streams[]; /* if not all list of streams */
471 } SCTP_PACKED;
472
473
474 struct sctp_stream_reset_tsn_request {
475 struct sctp_paramhdr ph;
476 uint32_t request_seq;
477 } SCTP_PACKED;
478
479 struct sctp_stream_reset_response {
480 struct sctp_paramhdr ph;
481 uint32_t response_seq; /* if a response, the resp seq no */
482 uint32_t result;
483 } SCTP_PACKED;
484
485 struct sctp_stream_reset_response_tsn {
486 struct sctp_paramhdr ph;
487 uint32_t response_seq; /* if a response, the resp seq no */
488 uint32_t result;
489 uint32_t senders_next_tsn;
490 uint32_t receivers_next_tsn;
491 } SCTP_PACKED;
492
493 struct sctp_stream_reset_add_strm {
494 struct sctp_paramhdr ph;
495 uint32_t request_seq;
496 uint16_t number_of_streams;
497 uint16_t reserved;
498 } SCTP_PACKED;
499
500 #define SCTP_STREAM_RESET_RESULT_NOTHING_TO_DO 0x00000000 /* XXX: unused */
501 #define SCTP_STREAM_RESET_RESULT_PERFORMED 0x00000001
502 #define SCTP_STREAM_RESET_RESULT_DENIED 0x00000002
503 #define SCTP_STREAM_RESET_RESULT_ERR__WRONG_SSN 0x00000003 /* XXX: unused */
504 #define SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS 0x00000004
505 #define SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO 0x00000005
506 #define SCTP_STREAM_RESET_RESULT_IN_PROGRESS 0x00000006 /* XXX: unused */
507
508 /*
509 * convience structures, note that if you are making a request for specific
510 * streams then the request will need to be an overlay structure.
511 */
512
513 struct sctp_stream_reset_tsn_req {
514 struct sctp_chunkhdr ch;
515 struct sctp_stream_reset_tsn_request sr_req;
516 } SCTP_PACKED;
517
518 struct sctp_stream_reset_resp {
519 struct sctp_chunkhdr ch;
520 struct sctp_stream_reset_response sr_resp;
521 } SCTP_PACKED;
522
523 /* respone only valid with a TSN request */
524 struct sctp_stream_reset_resp_tsn {
525 struct sctp_chunkhdr ch;
526 struct sctp_stream_reset_response_tsn sr_resp;
527 } SCTP_PACKED;
528
529 /****************************************************/
530
531 /*
532 * Authenticated chunks support draft-ietf-tsvwg-sctp-auth
533 */
534
535 /* Should we make the max be 32? */
536 #define SCTP_RANDOM_MAX_SIZE 256
537 struct sctp_auth_random {
538 struct sctp_paramhdr ph;/* type = 0x8002 */
539 uint8_t random_data[];
540 } SCTP_PACKED;
541
542 struct sctp_auth_chunk_list {
543 struct sctp_paramhdr ph;/* type = 0x8003 */
544 uint8_t chunk_types[];
545 } SCTP_PACKED;
546
547 struct sctp_auth_hmac_algo {
548 struct sctp_paramhdr ph;/* type = 0x8004 */
549 uint16_t hmac_ids[];
550 } SCTP_PACKED;
551
552 struct sctp_auth_chunk {
553 struct sctp_chunkhdr ch;
554 uint16_t shared_key_id;
555 uint16_t hmac_id;
556 uint8_t hmac[];
557 } SCTP_PACKED;
558
559 struct sctp_auth_invalid_hmac {
560 struct sctp_paramhdr ph;
561 uint16_t hmac_id;
562 uint16_t padding;
563 } SCTP_PACKED;
564
565 /*
566 * we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
567 * pieces. If ENCE is missing we could have a couple of blocks. This way we
568 * optimize so we MOST likely can bundle a SACK/ECN with the smallest size
569 * data chunk I will split into. We could increase throughput slightly by
570 * taking out these two but the 24-sack/8-CWR i.e. 32 bytes I pre-reserve I
571 * feel is worth it for now.
572 */
573 #ifndef SCTP_MAX_OVERHEAD
574 #ifdef INET6
575 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
576 sizeof(struct sctphdr) + \
577 sizeof(struct sctp_ecne_chunk) + \
578 sizeof(struct sctp_sack_chunk) + \
579 sizeof(struct ip6_hdr))
580
581 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
582 sizeof(struct sctphdr) + \
583 sizeof(struct ip6_hdr))
584
585
586 #define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
587 sizeof(struct sctphdr))
588
589 #else
590 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
591 sizeof(struct sctphdr) + \
592 sizeof(struct sctp_ecne_chunk) + \
593 sizeof(struct sctp_sack_chunk) + \
594 sizeof(struct ip))
595
596 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
597 sizeof(struct sctphdr) + \
598 sizeof(struct ip))
599
600
601 #define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
602 sizeof(struct sctphdr))
603
604 #endif /* INET6 */
605 #endif /* !SCTP_MAX_OVERHEAD */
606
607 #define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
608 sizeof(struct sctphdr) + \
609 sizeof(struct ip))
610
611 #define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
612 sizeof(struct sctphdr))
613
614 #undef SCTP_PACKED
615 #endif /* !__sctp_header_h__ */
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