FreeBSD kernel IPv4 code
sctp_input.c
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1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001-2008, 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#include <netinet/sctp_os.h>
39#include <netinet/sctp_var.h>
40#include <netinet/sctp_sysctl.h>
41#include <netinet/sctp_pcb.h>
42#include <netinet/sctp_header.h>
43#include <netinet/sctputil.h>
44#include <netinet/sctp_output.h>
45#include <netinet/sctp_input.h>
46#include <netinet/sctp_auth.h>
47#include <netinet/sctp_indata.h>
48#include <netinet/sctp_asconf.h>
49#include <netinet/sctp_bsd_addr.h>
50#include <netinet/sctp_timer.h>
51#include <netinet/sctp_crc32.h>
52#include <netinet/sctp_kdtrace.h>
53#if defined(INET) || defined(INET6)
54#include <netinet/udp.h>
55#endif
56#include <sys/smp.h>
57
58static void
59sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
60{
61 struct sctp_nets *net;
62
63 /*
64 * This now not only stops all cookie timers it also stops any INIT
65 * timers as well. This will make sure that the timers are stopped
66 * in all collision cases.
67 */
68 SCTP_TCB_LOCK_ASSERT(stcb);
69 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
70 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
71 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
72 stcb->sctp_ep,
73 stcb,
74 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
75 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
76 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
77 stcb->sctp_ep,
78 stcb,
79 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
80 }
81 }
82}
83
84/* INIT handler */
85static void
86sctp_handle_init(struct mbuf *m, int iphlen, int offset,
87 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
88 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
89 struct sctp_tcb *stcb, struct sctp_nets *net,
90 uint8_t mflowtype, uint32_t mflowid,
91 uint32_t vrf_id, uint16_t port)
92{
93 struct sctp_init *init;
94 struct mbuf *op_err;
95
96 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
97 (void *)stcb);
98 if (stcb == NULL) {
99 SCTP_INP_RLOCK(inp);
100 }
101 /* Validate parameters */
102 init = &cp->init;
103 if (ntohl(init->initiate_tag) == 0) {
104 goto outnow;
105 }
106 if ((ntohl(init->a_rwnd) < SCTP_MIN_RWND) ||
107 (ntohs(init->num_inbound_streams) == 0) ||
108 (ntohs(init->num_outbound_streams) == 0)) {
109 /* protocol error... send abort */
110 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
111 sctp_send_abort(m, iphlen, src, dst, sh, init->initiate_tag, op_err,
112 mflowtype, mflowid, inp->fibnum,
113 vrf_id, port);
114 goto outnow;
115 }
116 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
117 offset + ntohs(cp->ch.chunk_length))) {
118 /* auth parameter(s) error... send abort */
119 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
120 "Problem with AUTH parameters");
121 sctp_send_abort(m, iphlen, src, dst, sh, init->initiate_tag, op_err,
122 mflowtype, mflowid, inp->fibnum,
123 vrf_id, port);
124 goto outnow;
125 }
126 /* We are only accepting if we have a listening socket. */
127 if ((stcb == NULL) &&
128 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
129 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
130 (!SCTP_IS_LISTENING(inp)))) {
131 /*
132 * FIX ME ?? What about TCP model and we have a
133 * match/restart case? Actually no fix is needed. the lookup
134 * will always find the existing assoc so stcb would not be
135 * NULL. It may be questionable to do this since we COULD
136 * just send back the INIT-ACK and hope that the app did
137 * accept()'s by the time the COOKIE was sent. But there is
138 * a price to pay for COOKIE generation and I don't want to
139 * pay it on the chance that the app will actually do some
140 * accepts(). The App just looses and should NOT be in this
141 * state :-)
142 */
143 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
144 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
145 "No listener");
146 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
147 mflowtype, mflowid, inp->fibnum,
148 vrf_id, port);
149 }
150 goto outnow;
151 }
152 if ((stcb != NULL) &&
153 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
154 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
155 sctp_send_shutdown_ack(stcb, NULL);
156 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
157 } else {
158 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
159 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
160 src, dst, sh, cp,
161 mflowtype, mflowid,
162 vrf_id, port);
163 }
164outnow:
165 if (stcb == NULL) {
166 SCTP_INP_RUNLOCK(inp);
167 }
168}
169
170/*
171 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
172 */
173
174int
175sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked)
176{
177 int unsent_data;
178 unsigned int i;
179 struct sctp_stream_queue_pending *sp;
180 struct sctp_association *asoc;
181
182 /*
183 * This function returns if any stream has true unsent data on it.
184 * Note that as it looks through it will clean up any places that
185 * have old data that has been sent but left at top of stream queue.
186 */
187 asoc = &stcb->asoc;
188 unsent_data = 0;
189 SCTP_TCB_SEND_LOCK(stcb);
190 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
191 /* Check to see if some data queued */
192 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
193 /* sa_ignore FREED_MEMORY */
194 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
195 if (sp == NULL) {
196 continue;
197 }
198 if ((sp->msg_is_complete) &&
199 (sp->length == 0) &&
200 (sp->sender_all_done)) {
201 /*
202 * We are doing differed cleanup. Last time
203 * through when we took all the data the
204 * sender_all_done was not set.
205 */
206 if (sp->put_last_out == 0) {
207 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
208 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
209 sp->sender_all_done,
210 sp->length,
211 sp->msg_is_complete,
212 sp->put_last_out);
213 }
214 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
215 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
216 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp);
217 if (sp->net) {
218 sctp_free_remote_addr(sp->net);
219 sp->net = NULL;
220 }
221 if (sp->data) {
222 sctp_m_freem(sp->data);
223 sp->data = NULL;
224 }
225 sctp_free_a_strmoq(stcb, sp, so_locked);
226 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
227 unsent_data++;
228 }
229 } else {
230 unsent_data++;
231 }
232 if (unsent_data > 0) {
233 break;
234 }
235 }
236 }
237 SCTP_TCB_SEND_UNLOCK(stcb);
238 return (unsent_data);
239}
240
241static int
242sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
243{
244 struct sctp_init *init;
245 struct sctp_association *asoc;
246 struct sctp_nets *lnet;
247 unsigned int i;
248
249 init = &cp->init;
250 asoc = &stcb->asoc;
251 /* save off parameters */
252 asoc->peer_vtag = ntohl(init->initiate_tag);
253 asoc->peers_rwnd = ntohl(init->a_rwnd);
254 /* init tsn's */
255 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
256
257 if (!TAILQ_EMPTY(&asoc->nets)) {
258 /* update any ssthresh's that may have a default */
259 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
260 lnet->ssthresh = asoc->peers_rwnd;
261 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
262 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
263 }
264 }
265 }
266 SCTP_TCB_SEND_LOCK(stcb);
267 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
268 unsigned int newcnt;
269 struct sctp_stream_out *outs;
270 struct sctp_stream_queue_pending *sp, *nsp;
271 struct sctp_tmit_chunk *chk, *nchk;
272
273 /* abandon the upper streams */
274 newcnt = ntohs(init->num_inbound_streams);
275 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
276 if (chk->rec.data.sid >= newcnt) {
277 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
278 asoc->send_queue_cnt--;
279 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
280 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
281#ifdef INVARIANTS
282 } else {
283 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
284#endif
285 }
286 if (chk->data != NULL) {
287 sctp_free_bufspace(stcb, asoc, chk, 1);
288 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
289 0, chk, SCTP_SO_NOT_LOCKED);
290 if (chk->data) {
291 sctp_m_freem(chk->data);
292 chk->data = NULL;
293 }
294 }
295 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
296 /* sa_ignore FREED_MEMORY */
297 }
298 }
299 if (asoc->strmout) {
300 for (i = newcnt; i < asoc->pre_open_streams; i++) {
301 outs = &asoc->strmout[i];
302 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
303 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
304 TAILQ_REMOVE(&outs->outqueue, sp, next);
305 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
306 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
307 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
308 if (sp->data) {
309 sctp_m_freem(sp->data);
310 sp->data = NULL;
311 }
312 if (sp->net) {
313 sctp_free_remote_addr(sp->net);
314 sp->net = NULL;
315 }
316 /* Free the chunk */
317 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
318 /* sa_ignore FREED_MEMORY */
319 }
320 outs->state = SCTP_STREAM_CLOSED;
321 }
322 }
323 /* cut back the count */
324 asoc->pre_open_streams = newcnt;
325 }
326 SCTP_TCB_SEND_UNLOCK(stcb);
327 asoc->streamoutcnt = asoc->pre_open_streams;
328 if (asoc->strmout) {
329 for (i = 0; i < asoc->streamoutcnt; i++) {
330 asoc->strmout[i].state = SCTP_STREAM_OPEN;
331 }
332 }
333 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
334 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
335 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
336 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
337 }
338 /* This is the next one we expect */
339 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
340
341 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
342 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
343
344 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
345 /* open the requested streams */
346
347 if (asoc->strmin != NULL) {
348 /* Free the old ones */
349 for (i = 0; i < asoc->streamincnt; i++) {
350 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
351 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
352 }
353 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
354 }
355 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
356 asoc->streamincnt = ntohs(init->num_outbound_streams);
357 } else {
358 asoc->streamincnt = asoc->max_inbound_streams;
359 }
360 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
361 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
362 if (asoc->strmin == NULL) {
363 /* we didn't get memory for the streams! */
364 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
365 return (-1);
366 }
367 for (i = 0; i < asoc->streamincnt; i++) {
368 asoc->strmin[i].sid = i;
369 asoc->strmin[i].last_mid_delivered = 0xffffffff;
370 TAILQ_INIT(&asoc->strmin[i].inqueue);
371 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
372 asoc->strmin[i].pd_api_started = 0;
373 asoc->strmin[i].delivery_started = 0;
374 }
375 /*
376 * load_address_from_init will put the addresses into the
377 * association when the COOKIE is processed or the INIT-ACK is
378 * processed. Both types of COOKIE's existing and new call this
379 * routine. It will remove addresses that are no longer in the
380 * association (for the restarting case where addresses are
381 * removed). Up front when the INIT arrives we will discard it if it
382 * is a restart and new addresses have been added.
383 */
384 /* sa_ignore MEMLEAK */
385 return (0);
386}
387
388/*
389 * INIT-ACK message processing/consumption returns value < 0 on error
390 */
391static int
392sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
393 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
394 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
395 struct sctp_nets *net, int *abort_no_unlock,
396 uint8_t mflowtype, uint32_t mflowid,
397 uint32_t vrf_id)
398{
399 struct sctp_association *asoc;
400 struct mbuf *op_err;
401 int retval, abort_flag, cookie_found;
402 int initack_limit;
403 int nat_friendly = 0;
404
405 /* First verify that we have no illegal param's */
406 abort_flag = 0;
407 cookie_found = 0;
408
409 op_err = sctp_arethere_unrecognized_parameters(m,
410 (offset + sizeof(struct sctp_init_chunk)),
411 &abort_flag, (struct sctp_chunkhdr *)cp,
412 &nat_friendly, &cookie_found);
413 if (abort_flag) {
414 /* Send an abort and notify peer */
415 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
416 *abort_no_unlock = 1;
417 return (-1);
418 }
419 if (!cookie_found) {
420 uint16_t len;
421
422 /* Only report the missing cookie parameter */
423 if (op_err != NULL) {
424 sctp_m_freem(op_err);
425 }
426 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
427 /* We abort with an error of missing mandatory param */
428 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
429 if (op_err != NULL) {
430 struct sctp_error_missing_param *cause;
431
432 SCTP_BUF_LEN(op_err) = len;
433 cause = mtod(op_err, struct sctp_error_missing_param *);
434 /* Subtract the reserved param */
435 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
436 cause->cause.length = htons(len);
437 cause->num_missing_params = htonl(1);
438 cause->type[0] = htons(SCTP_STATE_COOKIE);
439 }
440 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
441 src, dst, sh, op_err,
442 mflowtype, mflowid,
443 vrf_id, net->port);
444 *abort_no_unlock = 1;
445 return (-3);
446 }
447 asoc = &stcb->asoc;
448 asoc->peer_supports_nat = (uint8_t)nat_friendly;
449 /* process the peer's parameters in the INIT-ACK */
450 if (sctp_process_init((struct sctp_init_chunk *)cp, stcb) < 0) {
451 if (op_err != NULL) {
452 sctp_m_freem(op_err);
453 }
454 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
455 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
456 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
457 src, dst, sh, op_err,
458 mflowtype, mflowid,
459 vrf_id, net->port);
460 *abort_no_unlock = 1;
461 return (-1);
462 }
463 initack_limit = offset + ntohs(cp->ch.chunk_length);
464 /* load all addresses */
465 if ((retval = sctp_load_addresses_from_init(stcb, m,
466 offset + sizeof(struct sctp_init_chunk),
467 initack_limit, src, dst, NULL, stcb->asoc.port)) < 0) {
468 if (op_err != NULL) {
469 sctp_m_freem(op_err);
470 }
471 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
472 "Problem with address parameters");
473 SCTPDBG(SCTP_DEBUG_INPUT1,
474 "Load addresses from INIT causes an abort %d\n",
475 retval);
476 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
477 src, dst, sh, op_err,
478 mflowtype, mflowid,
479 vrf_id, net->port);
480 *abort_no_unlock = 1;
481 return (-1);
482 }
483 /* if the peer doesn't support asconf, flush the asconf queue */
484 if (asoc->asconf_supported == 0) {
485 struct sctp_asconf_addr *param, *nparam;
486
487 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
488 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
489 SCTP_FREE(param, SCTP_M_ASC_ADDR);
490 }
491 }
492
493 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
494 stcb->asoc.local_hmacs);
495 if (op_err) {
496 sctp_queue_op_err(stcb, op_err);
497 /* queuing will steal away the mbuf chain to the out queue */
498 op_err = NULL;
499 }
500 /* extract the cookie and queue it to "echo" it back... */
501 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
502 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
503 stcb->asoc.overall_error_count,
504 0,
505 SCTP_FROM_SCTP_INPUT,
506 __LINE__);
507 }
508 stcb->asoc.overall_error_count = 0;
509 net->error_count = 0;
510
511 /*
512 * Cancel the INIT timer, We do this first before queueing the
513 * cookie. We always cancel at the primary to assume that we are
514 * canceling the timer started by the INIT which always goes to the
515 * primary.
516 */
517 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
518 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
519
520 /* calculate the RTO */
521 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
522 SCTP_RTT_FROM_NON_DATA);
523 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
524 return (retval);
525}
526
527static void
528sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
529 struct sctp_tcb *stcb, struct sctp_nets *net)
530{
531 union sctp_sockstore store;
532 struct sctp_nets *r_net, *f_net;
533 struct timeval tv;
534 int req_prim = 0;
535 uint16_t old_error_counter;
536
537 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
538 /* Invalid length */
539 return;
540 }
541
542 memset(&store, 0, sizeof(store));
543 switch (cp->heartbeat.hb_info.addr_family) {
544#ifdef INET
545 case AF_INET:
546 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
547 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
548 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
549 store.sin.sin_port = stcb->rport;
550 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
551 sizeof(store.sin.sin_addr));
552 } else {
553 return;
554 }
555 break;
556#endif
557#ifdef INET6
558 case AF_INET6:
559 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
560 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
561 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
562 store.sin6.sin6_port = stcb->rport;
563 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
564 } else {
565 return;
566 }
567 break;
568#endif
569 default:
570 return;
571 }
572 r_net = sctp_findnet(stcb, &store.sa);
573 if (r_net == NULL) {
574 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
575 return;
576 }
577 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
578 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
579 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
580 /*
581 * If the its a HB and it's random value is correct when can
582 * confirm the destination.
583 */
584 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
585 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
586 stcb->asoc.primary_destination = r_net;
587 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
588 f_net = TAILQ_FIRST(&stcb->asoc.nets);
589 if (f_net != r_net) {
590 /*
591 * first one on the list is NOT the primary
592 * sctp_cmpaddr() is much more efficient if
593 * the primary is the first on the list,
594 * make it so.
595 */
596 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
597 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
598 }
599 req_prim = 1;
600 }
601 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
602 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
603 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
604 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
605 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
606 }
607 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
608 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
609 stcb->asoc.overall_error_count,
610 0,
611 SCTP_FROM_SCTP_INPUT,
612 __LINE__);
613 }
614 stcb->asoc.overall_error_count = 0;
615 old_error_counter = r_net->error_count;
616 r_net->error_count = 0;
617 r_net->hb_responded = 1;
618 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
619 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
620 /* Now lets do a RTO with this */
621 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
622 SCTP_RTT_FROM_NON_DATA);
623 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
624 r_net->dest_state |= SCTP_ADDR_REACHABLE;
625 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
626 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
627 }
628 if (r_net->dest_state & SCTP_ADDR_PF) {
629 r_net->dest_state &= ~SCTP_ADDR_PF;
630 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
631 }
632 if (old_error_counter > 0) {
633 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
634 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
635 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
636 }
637 if (r_net == stcb->asoc.primary_destination) {
638 if (stcb->asoc.alternate) {
639 /* release the alternate, primary is good */
640 sctp_free_remote_addr(stcb->asoc.alternate);
641 stcb->asoc.alternate = NULL;
642 }
643 }
644 /* Mobility adaptation */
645 if (req_prim) {
646 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
647 SCTP_MOBILITY_BASE) ||
648 sctp_is_mobility_feature_on(stcb->sctp_ep,
649 SCTP_MOBILITY_FASTHANDOFF)) &&
650 sctp_is_mobility_feature_on(stcb->sctp_ep,
651 SCTP_MOBILITY_PRIM_DELETED)) {
652 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
653 stcb->sctp_ep, stcb, NULL,
654 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
655 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
656 SCTP_MOBILITY_FASTHANDOFF)) {
657 sctp_assoc_immediate_retrans(stcb,
658 stcb->asoc.primary_destination);
659 }
660 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
661 SCTP_MOBILITY_BASE)) {
662 sctp_move_chunks_from_net(stcb,
663 stcb->asoc.deleted_primary);
664 }
665 sctp_delete_prim_timer(stcb->sctp_ep, stcb);
666 }
667 }
668}
669
670static int
671sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
672{
673 /*
674 * Return 0 means we want you to proceed with the abort non-zero
675 * means no abort processing.
676 */
677 uint32_t new_vtag;
678 struct sctpasochead *head;
679
680 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
681 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
682 atomic_add_int(&stcb->asoc.refcnt, 1);
683 SCTP_TCB_UNLOCK(stcb);
684 SCTP_INP_INFO_WLOCK();
685 SCTP_TCB_LOCK(stcb);
686 atomic_subtract_int(&stcb->asoc.refcnt, 1);
687 } else {
688 return (0);
689 }
690 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
691 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
692 /* generate a new vtag and send init */
693 LIST_REMOVE(stcb, sctp_asocs);
694 stcb->asoc.my_vtag = new_vtag;
695 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
696 /*
697 * put it in the bucket in the vtag hash of assoc's for the
698 * system
699 */
700 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
701 SCTP_INP_INFO_WUNLOCK();
702 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
703 return (1);
704 } else {
705 /*
706 * treat like a case where the cookie expired i.e.: - dump
707 * current cookie. - generate a new vtag. - resend init.
708 */
709 /* generate a new vtag and send init */
710 LIST_REMOVE(stcb, sctp_asocs);
711 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
712 sctp_stop_all_cookie_timers(stcb);
713 sctp_toss_old_cookies(stcb, &stcb->asoc);
714 stcb->asoc.my_vtag = new_vtag;
715 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
716 /*
717 * put it in the bucket in the vtag hash of assoc's for the
718 * system
719 */
720 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
721 SCTP_INP_INFO_WUNLOCK();
722 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
723 return (1);
724 }
725 return (0);
726}
727
728static int
729sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
730 struct sctp_nets *net)
731{
732 /*
733 * return 0 means we want you to proceed with the abort non-zero
734 * means no abort processing
735 */
736 if (stcb->asoc.auth_supported == 0) {
737 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
738 return (0);
739 }
740 sctp_asconf_send_nat_state_update(stcb, net);
741 return (1);
742}
743
744/* Returns 1 if the stcb was aborted, 0 otherwise */
745static int
746sctp_handle_abort(struct sctp_abort_chunk *abort,
747 struct sctp_tcb *stcb, struct sctp_nets *net)
748{
749 uint16_t len;
750 uint16_t error;
751
752 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
753 if (stcb == NULL)
754 return (0);
755
756 len = ntohs(abort->ch.chunk_length);
757 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
758 /*
759 * Need to check the cause codes for our two magic nat
760 * aborts which don't kill the assoc necessarily.
761 */
762 struct sctp_error_cause *cause;
763
764 cause = (struct sctp_error_cause *)(abort + 1);
765 error = ntohs(cause->code);
766 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
767 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ABORT flags:%x\n",
768 abort->ch.chunk_flags);
769 if (sctp_handle_nat_colliding_state(stcb)) {
770 return (0);
771 }
772 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
773 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ABORT flags:%x\n",
774 abort->ch.chunk_flags);
775 if (sctp_handle_nat_missing_state(stcb, net)) {
776 return (0);
777 }
778 }
779 } else {
780 error = 0;
781 }
782 /* stop any receive timers */
783 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
784 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
785 /* notify user of the abort and clean up... */
786 sctp_abort_notification(stcb, true, false, error, abort, SCTP_SO_NOT_LOCKED);
787 /* free the tcb */
788 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
789 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
790 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
791 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
792 }
793#ifdef SCTP_ASOCLOG_OF_TSNS
794 sctp_print_out_track_log(stcb);
795#endif
796 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
797 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
798 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
799 return (1);
800}
801
802static void
803sctp_start_net_timers(struct sctp_tcb *stcb)
804{
805 uint32_t cnt_hb_sent;
806 struct sctp_nets *net;
807
808 cnt_hb_sent = 0;
809 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
810 /*
811 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
812 * If the dest in unconfirmed send a hb as well if under
813 * max_hb_burst have been sent.
814 */
815 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
816 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
817 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
818 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
819 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
820 cnt_hb_sent++;
821 }
822 }
823 if (cnt_hb_sent) {
824 sctp_chunk_output(stcb->sctp_ep, stcb,
825 SCTP_OUTPUT_FROM_COOKIE_ACK,
826 SCTP_SO_NOT_LOCKED);
827 }
828}
829
830static void
831sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
832 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
833{
834 struct sctp_association *asoc;
835 int some_on_streamwheel;
836 int old_state;
837
838 SCTPDBG(SCTP_DEBUG_INPUT2,
839 "sctp_handle_shutdown: handling SHUTDOWN\n");
840 if (stcb == NULL)
841 return;
842 asoc = &stcb->asoc;
843 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
844 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
845 return;
846 }
847 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
848 /* Shutdown NOT the expected size */
849 return;
850 }
851 old_state = SCTP_GET_STATE(stcb);
852 sctp_update_acked(stcb, cp, abort_flag);
853 if (*abort_flag) {
854 return;
855 }
856 if (asoc->control_pdapi) {
857 /*
858 * With a normal shutdown we assume the end of last record.
859 */
860 SCTP_INP_READ_LOCK(stcb->sctp_ep);
861 if (asoc->control_pdapi->on_strm_q) {
862 struct sctp_stream_in *strm;
863
864 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
865 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
866 /* Unordered */
867 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
868 asoc->control_pdapi->on_strm_q = 0;
869 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
870 /* Ordered */
871 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
872 asoc->control_pdapi->on_strm_q = 0;
873#ifdef INVARIANTS
874 } else {
875 panic("Unknown state on ctrl:%p on_strm_q:%d",
876 asoc->control_pdapi,
877 asoc->control_pdapi->on_strm_q);
878#endif
879 }
880 }
881 asoc->control_pdapi->end_added = 1;
882 asoc->control_pdapi->pdapi_aborted = 1;
883 asoc->control_pdapi = NULL;
884 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
885 if (stcb->sctp_socket) {
886 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
887 }
888 }
889 /* goto SHUTDOWN_RECEIVED state to block new requests */
890 if (stcb->sctp_socket) {
891 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
892 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
893 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
894 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
895 /*
896 * notify upper layer that peer has initiated a
897 * shutdown
898 */
899 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
900
901 /* reset time */
902 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
903 }
904 }
905 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
906 /*
907 * stop the shutdown timer, since we WILL move to
908 * SHUTDOWN-ACK-SENT.
909 */
910 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
911 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
912 }
913 /* Now is there unsent data on a stream somewhere? */
914 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
915
916 if (!TAILQ_EMPTY(&asoc->send_queue) ||
917 !TAILQ_EMPTY(&asoc->sent_queue) ||
918 some_on_streamwheel) {
919 /* By returning we will push more data out */
920 return;
921 } else {
922 /* no outstanding data to send, so move on... */
923 /* send SHUTDOWN-ACK */
924 /* move to SHUTDOWN-ACK-SENT state */
925 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
926 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
927 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
928 }
929 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
930 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
931 sctp_stop_timers_for_shutdown(stcb);
932 sctp_send_shutdown_ack(stcb, net);
933 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
934 stcb->sctp_ep, stcb, net);
935 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
936 sctp_send_shutdown_ack(stcb, net);
937 }
938 }
939}
940
941static void
942sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
943 struct sctp_tcb *stcb,
944 struct sctp_nets *net)
945{
946 struct sctp_association *asoc;
947
948 SCTPDBG(SCTP_DEBUG_INPUT2,
949 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
950 if (stcb == NULL)
951 return;
952
953 asoc = &stcb->asoc;
954 /* process according to association state */
955 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
956 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
957 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
958 sctp_send_shutdown_complete(stcb, net, 1);
959 SCTP_TCB_UNLOCK(stcb);
960 return;
961 }
962 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
963 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
964 /* unexpected SHUTDOWN-ACK... so ignore... */
965 SCTP_TCB_UNLOCK(stcb);
966 return;
967 }
968 if (asoc->control_pdapi) {
969 /*
970 * With a normal shutdown we assume the end of last record.
971 */
972 SCTP_INP_READ_LOCK(stcb->sctp_ep);
973 asoc->control_pdapi->end_added = 1;
974 asoc->control_pdapi->pdapi_aborted = 1;
975 asoc->control_pdapi = NULL;
976 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
977 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
978 }
979#ifdef INVARIANTS
980 if (!TAILQ_EMPTY(&asoc->send_queue) ||
981 !TAILQ_EMPTY(&asoc->sent_queue) ||
982 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
983 panic("Queues are not empty when handling SHUTDOWN-ACK");
984 }
985#endif
986 /* stop the timer */
987 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
988 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
989 /* send SHUTDOWN-COMPLETE */
990 sctp_send_shutdown_complete(stcb, net, 0);
991 /* notify upper layer protocol */
992 if (stcb->sctp_socket) {
993 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
994 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
995 stcb->sctp_socket->so_snd.sb_cc = 0;
996 }
997 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
998 }
999 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1000 /* free the TCB but first save off the ep */
1001 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1002 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1003}
1004
1005static void
1006sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1007{
1008 switch (chunk_type) {
1009 case SCTP_ASCONF_ACK:
1010 case SCTP_ASCONF:
1011 sctp_asconf_cleanup(stcb);
1012 break;
1013 case SCTP_IFORWARD_CUM_TSN:
1014 case SCTP_FORWARD_CUM_TSN:
1015 stcb->asoc.prsctp_supported = 0;
1016 break;
1017 default:
1018 SCTPDBG(SCTP_DEBUG_INPUT2,
1019 "Peer does not support chunk type %d (0x%x).\n",
1020 chunk_type, chunk_type);
1021 break;
1022 }
1023}
1024
1025/*
1026 * Skip past the param header and then we will find the param that caused the
1027 * problem. There are a number of param's in a ASCONF OR the prsctp param
1028 * these will turn of specific features.
1029 * XXX: Is this the right thing to do?
1030 */
1031static void
1032sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1033{
1034 switch (parameter_type) {
1035 /* pr-sctp draft */
1036 case SCTP_PRSCTP_SUPPORTED:
1037 stcb->asoc.prsctp_supported = 0;
1038 break;
1039 case SCTP_SUPPORTED_CHUNK_EXT:
1040 break;
1041 /* draft-ietf-tsvwg-addip-sctp */
1042 case SCTP_HAS_NAT_SUPPORT:
1043 stcb->asoc.peer_supports_nat = 0;
1044 break;
1045 case SCTP_ADD_IP_ADDRESS:
1046 case SCTP_DEL_IP_ADDRESS:
1047 case SCTP_SET_PRIM_ADDR:
1048 stcb->asoc.asconf_supported = 0;
1049 break;
1050 case SCTP_SUCCESS_REPORT:
1051 case SCTP_ERROR_CAUSE_IND:
1052 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1053 SCTPDBG(SCTP_DEBUG_INPUT2,
1054 "Turning off ASCONF to this strange peer\n");
1055 stcb->asoc.asconf_supported = 0;
1056 break;
1057 default:
1058 SCTPDBG(SCTP_DEBUG_INPUT2,
1059 "Peer does not support param type %d (0x%x)??\n",
1060 parameter_type, parameter_type);
1061 break;
1062 }
1063}
1064
1065static int
1066sctp_handle_error(struct sctp_chunkhdr *ch,
1067 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1068{
1069 struct sctp_error_cause *cause;
1070 struct sctp_association *asoc;
1071 uint32_t remaining_length, adjust;
1072 uint16_t code, cause_code, cause_length;
1073
1074 /* parse through all of the errors and process */
1075 asoc = &stcb->asoc;
1076 cause = (struct sctp_error_cause *)((caddr_t)ch +
1077 sizeof(struct sctp_chunkhdr));
1078 remaining_length = ntohs(ch->chunk_length);
1079 if (remaining_length > limit) {
1080 remaining_length = limit;
1081 }
1082 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1083 remaining_length -= sizeof(struct sctp_chunkhdr);
1084 } else {
1085 remaining_length = 0;
1086 }
1087 code = 0;
1088 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1089 /* Process an Error Cause */
1090 cause_code = ntohs(cause->code);
1091 cause_length = ntohs(cause->length);
1092 if ((cause_length > remaining_length) || (cause_length == 0)) {
1093 /* Invalid cause length, possibly due to truncation. */
1094 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1095 remaining_length, cause_length);
1096 return (0);
1097 }
1098 if (code == 0) {
1099 /* report the first error cause */
1100 code = cause_code;
1101 }
1102 switch (cause_code) {
1103 case SCTP_CAUSE_INVALID_STREAM:
1104 case SCTP_CAUSE_MISSING_PARAM:
1105 case SCTP_CAUSE_INVALID_PARAM:
1106 case SCTP_CAUSE_NO_USER_DATA:
1107 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1108 cause_code);
1109 break;
1110 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1111 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ERROR flags: %x\n",
1112 ch->chunk_flags);
1113 if (sctp_handle_nat_colliding_state(stcb)) {
1114 return (0);
1115 }
1116 break;
1117 case SCTP_CAUSE_NAT_MISSING_STATE:
1118 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ERROR flags: %x\n",
1119 ch->chunk_flags);
1120 if (sctp_handle_nat_missing_state(stcb, net)) {
1121 return (0);
1122 }
1123 break;
1124 case SCTP_CAUSE_STALE_COOKIE:
1125 /*
1126 * We only act if we have echoed a cookie and are
1127 * waiting.
1128 */
1129 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1130 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1131 struct sctp_error_stale_cookie *stale_cookie;
1132
1133 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1134 /* stable_time is in usec, convert to msec. */
1135 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time) / 1000;
1136 /* Double it to be more robust on RTX. */
1137 asoc->cookie_preserve_req *= 2;
1138 asoc->stale_cookie_count++;
1139 if (asoc->stale_cookie_count >
1140 asoc->max_init_times) {
1141 sctp_abort_notification(stcb, false, true, 0, NULL, SCTP_SO_NOT_LOCKED);
1142 /* now free the asoc */
1143 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1144 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1145 return (-1);
1146 }
1147 /* blast back to INIT state */
1148 sctp_toss_old_cookies(stcb, &stcb->asoc);
1149 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1150 sctp_stop_all_cookie_timers(stcb);
1151 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1152 }
1153 break;
1154 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1155 /*
1156 * Nothing we can do here, we don't do hostname
1157 * addresses so if the peer does not like my IPv6
1158 * (or IPv4 for that matter) it does not matter. If
1159 * they don't support that type of address, they can
1160 * NOT possibly get that packet type... i.e. with no
1161 * IPv6 you can't receive a IPv6 packet. so we can
1162 * safely ignore this one. If we ever added support
1163 * for HOSTNAME Addresses, then we would need to do
1164 * something here.
1165 */
1166 break;
1167 case SCTP_CAUSE_UNRECOG_CHUNK:
1168 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1169 struct sctp_error_unrecognized_chunk *unrec_chunk;
1170
1171 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1172 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1173 }
1174 break;
1175 case SCTP_CAUSE_UNRECOG_PARAM:
1176 /* XXX: We only consider the first parameter */
1177 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1178 struct sctp_paramhdr *unrec_parameter;
1179
1180 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1181 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1182 }
1183 break;
1184 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1185 /*
1186 * We ignore this since the timer will drive out a
1187 * new cookie anyway and there timer will drive us
1188 * to send a SHUTDOWN_COMPLETE. We can't send one
1189 * here since we don't have their tag.
1190 */
1191 break;
1192 case SCTP_CAUSE_DELETING_LAST_ADDR:
1193 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1194 case SCTP_CAUSE_DELETING_SRC_ADDR:
1195 /*
1196 * We should NOT get these here, but in a
1197 * ASCONF-ACK.
1198 */
1199 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1200 cause_code);
1201 break;
1202 case SCTP_CAUSE_OUT_OF_RESC:
1203 /*
1204 * And what, pray tell do we do with the fact that
1205 * the peer is out of resources? Not really sure we
1206 * could do anything but abort. I suspect this
1207 * should have came WITH an abort instead of in a
1208 * OP-ERROR.
1209 */
1210 break;
1211 default:
1212 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1213 cause_code);
1214 break;
1215 }
1216 adjust = SCTP_SIZE32(cause_length);
1217 if (remaining_length >= adjust) {
1218 remaining_length -= adjust;
1219 } else {
1220 remaining_length = 0;
1221 }
1222 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1223 }
1224 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1225 return (0);
1226}
1227
1228static int
1229sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1230 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1231 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1232 struct sctp_nets *net, int *abort_no_unlock,
1233 uint8_t mflowtype, uint32_t mflowid,
1234 uint32_t vrf_id)
1235{
1236 struct sctp_init_ack *init_ack;
1237 struct mbuf *op_err;
1238
1239 SCTPDBG(SCTP_DEBUG_INPUT2,
1240 "sctp_handle_init_ack: handling INIT-ACK\n");
1241
1242 if (stcb == NULL) {
1243 SCTPDBG(SCTP_DEBUG_INPUT2,
1244 "sctp_handle_init_ack: TCB is null\n");
1245 return (-1);
1246 }
1247 /* Only process the INIT-ACK chunk in COOKIE WAIT state. */
1248 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
1249 init_ack = &cp->init;
1250 /* Validate parameters. */
1251 if ((ntohl(init_ack->initiate_tag) == 0) ||
1252 (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) ||
1253 (ntohs(init_ack->num_inbound_streams) == 0) ||
1254 (ntohs(init_ack->num_outbound_streams) == 0)) {
1255 /* One of the mandatory parameters is illegal. */
1256 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1257 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1258 src, dst, sh, op_err,
1259 mflowtype, mflowid,
1260 vrf_id, net->port);
1261 *abort_no_unlock = 1;
1262 return (-1);
1263 }
1264 if (stcb->asoc.primary_destination->dest_state &
1265 SCTP_ADDR_UNCONFIRMED) {
1266 /*
1267 * The primary is where we sent the INIT, we can
1268 * always consider it confirmed when the INIT-ACK is
1269 * returned. Do this before we load addresses
1270 * though.
1271 */
1272 stcb->asoc.primary_destination->dest_state &=
1273 ~SCTP_ADDR_UNCONFIRMED;
1274 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1275 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1276 }
1277 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1278 net, abort_no_unlock,
1279 mflowtype, mflowid,
1280 vrf_id) < 0) {
1281 /* error in parsing parameters */
1282 return (-1);
1283 }
1284 /* Update our state. */
1285 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1286 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1287
1288 /* Reset the RTO calculation. */
1289 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1290 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1291 stcb->asoc.overall_error_count,
1292 0,
1293 SCTP_FROM_SCTP_INPUT,
1294 __LINE__);
1295 }
1296 stcb->asoc.overall_error_count = 0;
1297 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1298 /*
1299 * Collapse the init timer back in case of a exponential
1300 * backoff.
1301 */
1302 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1303 stcb, net);
1304 /*
1305 * The output routine at the end of the inbound data
1306 * processing will cause the cookie to be sent.
1307 */
1308 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1309 return (0);
1310 } else {
1311 return (-1);
1312 }
1313}
1314
1315static struct sctp_tcb *
1316sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1317 struct sockaddr *src, struct sockaddr *dst,
1318 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1319 struct sctp_inpcb *inp, struct sctp_nets **netp,
1320 struct sockaddr *init_src, int *notification,
1321 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1322 uint8_t mflowtype, uint32_t mflowid,
1323 uint32_t vrf_id, uint16_t port);
1324
1325/*
1326 * handle a state cookie for an existing association m: input packet mbuf
1327 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1328 * "split" mbuf and the cookie signature does not exist offset: offset into
1329 * mbuf to the cookie-echo chunk
1330 */
1331static struct sctp_tcb *
1332sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1333 struct sockaddr *src, struct sockaddr *dst,
1334 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1335 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1336 struct sockaddr *init_src, int *notification,
1337 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1338 uint8_t mflowtype, uint32_t mflowid,
1339 uint32_t vrf_id, uint16_t port)
1340{
1341 struct sctp_association *asoc;
1342 struct sctp_init_chunk *init_cp, init_buf;
1343 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1344 struct sctp_asconf_addr *aparam, *naparam;
1345 struct sctp_asconf_ack *aack, *naack;
1346 struct sctp_tmit_chunk *chk, *nchk;
1347 struct sctp_stream_reset_list *strrst, *nstrrst;
1348 struct sctp_queued_to_read *sq, *nsq;
1349 struct sctp_nets *net;
1350 struct mbuf *op_err;
1351 struct timeval old;
1352 int init_offset, initack_offset, i;
1353 int retval;
1354 int spec_flag = 0;
1355 uint32_t how_indx;
1356#if defined(SCTP_DETAILED_STR_STATS)
1357 int j;
1358#endif
1359
1360 net = *netp;
1361 /* I know that the TCB is non-NULL from the caller */
1362 asoc = &stcb->asoc;
1363 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1364 if (asoc->cookie_how[how_indx] == 0)
1365 break;
1366 }
1367 if (how_indx < sizeof(asoc->cookie_how)) {
1368 asoc->cookie_how[how_indx] = 1;
1369 }
1370 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1371 /* SHUTDOWN came in after sending INIT-ACK */
1372 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1373 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1374 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1375 mflowtype, mflowid, inp->fibnum,
1376 vrf_id, net->port);
1377 if (how_indx < sizeof(asoc->cookie_how))
1378 asoc->cookie_how[how_indx] = 2;
1379 SCTP_TCB_UNLOCK(stcb);
1380 return (NULL);
1381 }
1382 /*
1383 * find and validate the INIT chunk in the cookie (peer's info) the
1384 * INIT should start after the cookie-echo header struct (chunk
1385 * header, state cookie header struct)
1386 */
1387 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1388
1389 init_cp = (struct sctp_init_chunk *)
1390 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1391 (uint8_t *)&init_buf);
1392 if (init_cp == NULL) {
1393 /* could not pull a INIT chunk in cookie */
1394 SCTP_TCB_UNLOCK(stcb);
1395 return (NULL);
1396 }
1397 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1398 SCTP_TCB_UNLOCK(stcb);
1399 return (NULL);
1400 }
1401 /*
1402 * find and validate the INIT-ACK chunk in the cookie (my info) the
1403 * INIT-ACK follows the INIT chunk
1404 */
1405 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1406 initack_cp = (struct sctp_init_ack_chunk *)
1407 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1408 (uint8_t *)&initack_buf);
1409 if (initack_cp == NULL) {
1410 /* could not pull INIT-ACK chunk in cookie */
1411 SCTP_TCB_UNLOCK(stcb);
1412 return (NULL);
1413 }
1414 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1415 SCTP_TCB_UNLOCK(stcb);
1416 return (NULL);
1417 }
1418 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1419 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1420 /*
1421 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1422 * to get into the OPEN state
1423 */
1424 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1425 /*-
1426 * Opps, this means that we somehow generated two vtag's
1427 * the same. I.e. we did:
1428 * Us Peer
1429 * <---INIT(tag=a)------
1430 * ----INIT-ACK(tag=t)-->
1431 * ----INIT(tag=t)------> *1
1432 * <---INIT-ACK(tag=a)---
1433 * <----CE(tag=t)------------- *2
1434 *
1435 * At point *1 we should be generating a different
1436 * tag t'. Which means we would throw away the CE and send
1437 * ours instead. Basically this is case C (throw away side).
1438 */
1439 if (how_indx < sizeof(asoc->cookie_how))
1440 asoc->cookie_how[how_indx] = 17;
1441 SCTP_TCB_UNLOCK(stcb);
1442 return (NULL);
1443 }
1444 switch (SCTP_GET_STATE(stcb)) {
1445 case SCTP_STATE_COOKIE_WAIT:
1446 case SCTP_STATE_COOKIE_ECHOED:
1447 /*
1448 * INIT was sent but got a COOKIE_ECHO with the
1449 * correct tags... just accept it...but we must
1450 * process the init so that we can make sure we have
1451 * the right seq no's.
1452 */
1453 /* First we must process the INIT !! */
1454 if (sctp_process_init(init_cp, stcb) < 0) {
1455 if (how_indx < sizeof(asoc->cookie_how))
1456 asoc->cookie_how[how_indx] = 3;
1457 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1458 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1459 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1460 src, dst, sh, op_err,
1461 mflowtype, mflowid,
1462 vrf_id, net->port);
1463 return (NULL);
1464 }
1465 /* we have already processed the INIT so no problem */
1466 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1467 stcb, net,
1468 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1469 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1470 stcb, net,
1471 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1472 /* update current state */
1473 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1474 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1475 else
1476 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1477
1478 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1479 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1481 stcb->sctp_ep, stcb, NULL);
1482 }
1483 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1484 sctp_stop_all_cookie_timers(stcb);
1485 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1486 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1487 (!SCTP_IS_LISTENING(inp))) {
1488 /*
1489 * Here is where collision would go if we
1490 * did a connect() and instead got a
1491 * init/init-ack/cookie done before the
1492 * init-ack came back..
1493 */
1494 stcb->sctp_ep->sctp_flags |=
1495 SCTP_PCB_FLAGS_CONNECTED;
1496 soisconnected(stcb->sctp_socket);
1497 }
1498 /* notify upper layer */
1499 *notification = SCTP_NOTIFY_ASSOC_UP;
1500 /*
1501 * since we did not send a HB make sure we don't
1502 * double things
1503 */
1504 old.tv_sec = cookie->time_entered.tv_sec;
1505 old.tv_usec = cookie->time_entered.tv_usec;
1506 net->hb_responded = 1;
1507 sctp_calculate_rto(stcb, asoc, net, &old,
1508 SCTP_RTT_FROM_NON_DATA);
1509
1510 if (stcb->asoc.sctp_autoclose_ticks &&
1511 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1512 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1513 inp, stcb, NULL);
1514 }
1515 break;
1516 default:
1517 /*
1518 * we're in the OPEN state (or beyond), so peer must
1519 * have simply lost the COOKIE-ACK
1520 */
1521 break;
1522 } /* end switch */
1523 sctp_stop_all_cookie_timers(stcb);
1524 if ((retval = sctp_load_addresses_from_init(stcb, m,
1525 init_offset + sizeof(struct sctp_init_chunk),
1526 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1527 if (how_indx < sizeof(asoc->cookie_how))
1528 asoc->cookie_how[how_indx] = 4;
1529 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1530 "Problem with address parameters");
1531 SCTPDBG(SCTP_DEBUG_INPUT1,
1532 "Load addresses from INIT causes an abort %d\n",
1533 retval);
1534 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1535 src, dst, sh, op_err,
1536 mflowtype, mflowid,
1537 vrf_id, net->port);
1538 return (NULL);
1539 }
1540 /* respond with a COOKIE-ACK */
1541 sctp_toss_old_cookies(stcb, asoc);
1542 sctp_send_cookie_ack(stcb);
1543 if (how_indx < sizeof(asoc->cookie_how))
1544 asoc->cookie_how[how_indx] = 5;
1545 return (stcb);
1546 }
1547
1548 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1549 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1550 cookie->tie_tag_my_vtag == 0 &&
1551 cookie->tie_tag_peer_vtag == 0) {
1552 /*
1553 * case C in Section 5.2.4 Table 2: XMOO silently discard
1554 */
1555 if (how_indx < sizeof(asoc->cookie_how))
1556 asoc->cookie_how[how_indx] = 6;
1557 SCTP_TCB_UNLOCK(stcb);
1558 return (NULL);
1559 }
1560 /*
1561 * If nat support, and the below and stcb is established, send back
1562 * a ABORT(colliding state) if we are established.
1563 */
1564 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1565 (asoc->peer_supports_nat) &&
1566 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1567 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1568 (asoc->peer_vtag == 0)))) {
1569 /*
1570 * Special case - Peer's support nat. We may have two init's
1571 * that we gave out the same tag on since one was not
1572 * established.. i.e. we get INIT from host-1 behind the nat
1573 * and we respond tag-a, we get a INIT from host-2 behind
1574 * the nat and we get tag-a again. Then we bring up host-1
1575 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1576 * Now we have colliding state. We must send an abort here
1577 * with colliding state indication.
1578 */
1579 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1580 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1581 mflowtype, mflowid, inp->fibnum,
1582 vrf_id, port);
1583 SCTP_TCB_UNLOCK(stcb);
1584 return (NULL);
1585 }
1586 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1587 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1588 (asoc->peer_vtag == 0))) {
1589 /*
1590 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1591 * should be ok, re-accept peer info
1592 */
1593 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1594 /*
1595 * Extension of case C. If we hit this, then the
1596 * random number generator returned the same vtag
1597 * when we first sent our INIT-ACK and when we later
1598 * sent our INIT. The side with the seq numbers that
1599 * are different will be the one that normnally
1600 * would have hit case C. This in effect "extends"
1601 * our vtags in this collision case to be 64 bits.
1602 * The same collision could occur aka you get both
1603 * vtag and seq number the same twice in a row.. but
1604 * is much less likely. If it did happen then we
1605 * would proceed through and bring up the assoc.. we
1606 * may end up with the wrong stream setup however..
1607 * which would be bad.. but there is no way to
1608 * tell.. until we send on a stream that does not
1609 * exist :-)
1610 */
1611 if (how_indx < sizeof(asoc->cookie_how))
1612 asoc->cookie_how[how_indx] = 7;
1613
1614 SCTP_TCB_UNLOCK(stcb);
1615 return (NULL);
1616 }
1617 if (how_indx < sizeof(asoc->cookie_how))
1618 asoc->cookie_how[how_indx] = 8;
1619 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1620 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1621 sctp_stop_all_cookie_timers(stcb);
1622 /*
1623 * since we did not send a HB make sure we don't double
1624 * things
1625 */
1626 net->hb_responded = 1;
1627 if (stcb->asoc.sctp_autoclose_ticks &&
1628 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1629 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1630 NULL);
1631 }
1632 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1633 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1634 asoc->pre_open_streams = asoc->streamoutcnt;
1635 }
1636
1637 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1638 /*
1639 * Ok the peer probably discarded our data (if we
1640 * echoed a cookie+data). So anything on the
1641 * sent_queue should be marked for retransmit, we
1642 * may not get something to kick us so it COULD
1643 * still take a timeout to move these.. but it can't
1644 * hurt to mark them.
1645 */
1646
1647 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1648 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1649 chk->sent = SCTP_DATAGRAM_RESEND;
1650 sctp_flight_size_decrease(chk);
1651 sctp_total_flight_decrease(stcb, chk);
1652 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1653 spec_flag++;
1654 }
1655 }
1656 }
1657 /* process the INIT info (peer's info) */
1658 if (sctp_process_init(init_cp, stcb) < 0) {
1659 if (how_indx < sizeof(asoc->cookie_how))
1660 asoc->cookie_how[how_indx] = 9;
1661 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1662 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1663 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1664 src, dst, sh, op_err,
1665 mflowtype, mflowid,
1666 vrf_id, net->port);
1667 return (NULL);
1668 }
1669 if ((retval = sctp_load_addresses_from_init(stcb, m,
1670 init_offset + sizeof(struct sctp_init_chunk),
1671 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1672 if (how_indx < sizeof(asoc->cookie_how))
1673 asoc->cookie_how[how_indx] = 10;
1674 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1675 "Problem with address parameters");
1676 SCTPDBG(SCTP_DEBUG_INPUT1,
1677 "Load addresses from INIT causes an abort %d\n",
1678 retval);
1679 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1680 src, dst, sh, op_err,
1681 mflowtype, mflowid,
1682 vrf_id, net->port);
1683 return (NULL);
1684 }
1685 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1686 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1687 *notification = SCTP_NOTIFY_ASSOC_UP;
1688
1689 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1690 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1691 (!SCTP_IS_LISTENING(inp))) {
1692 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
1693 soisconnected(stcb->sctp_socket);
1694 }
1695 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1696 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1697 else
1698 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1699 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1700 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1701 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1702 } else {
1703 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1704 }
1705 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1706 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1707 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1708 stcb->sctp_ep, stcb, NULL);
1709 }
1710 sctp_stop_all_cookie_timers(stcb);
1711 sctp_toss_old_cookies(stcb, asoc);
1712 sctp_send_cookie_ack(stcb);
1713 if (spec_flag) {
1714 /*
1715 * only if we have retrans set do we do this. What
1716 * this call does is get only the COOKIE-ACK out and
1717 * then when we return the normal call to
1718 * sctp_chunk_output will get the retrans out behind
1719 * this.
1720 */
1721 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1722 }
1723 if (how_indx < sizeof(asoc->cookie_how))
1724 asoc->cookie_how[how_indx] = 11;
1725
1726 return (stcb);
1727 }
1728 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1729 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1730 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1731 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1732 cookie->tie_tag_peer_vtag != 0) {
1733 struct sctpasochead *head;
1734
1735 if (asoc->peer_supports_nat) {
1736 struct sctp_tcb *local_stcb;
1737
1738 /*
1739 * This is a gross gross hack. Just call the
1740 * cookie_new code since we are allowing a duplicate
1741 * association. I hope this works...
1742 */
1743 local_stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst,
1744 sh, cookie, cookie_len,
1745 inp, netp, init_src, notification,
1746 auth_skipped, auth_offset, auth_len,
1747 mflowtype, mflowid,
1748 vrf_id, port);
1749 if (local_stcb == NULL) {
1750 SCTP_TCB_UNLOCK(stcb);
1751 }
1752 return (local_stcb);
1753 }
1754 /*
1755 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1756 */
1757 /* temp code */
1758 if (how_indx < sizeof(asoc->cookie_how))
1759 asoc->cookie_how[how_indx] = 12;
1760 sctp_stop_association_timers(stcb, false);
1761 /* notify upper layer */
1762 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1763 atomic_add_int(&stcb->asoc.refcnt, 1);
1764 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1765 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1766 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1767 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1768 }
1769 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1770 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1771 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1772 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1773 }
1774 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1775 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1776 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1777 stcb->sctp_ep, stcb, NULL);
1778
1779 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1780 /* move to OPEN state, if not in SHUTDOWN_SENT */
1781 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1782 }
1783 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1784 asoc->pre_open_streams = asoc->streamoutcnt;
1785 }
1786 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1787 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1788 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1789 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1790 asoc->str_reset_seq_in = asoc->init_seq_number;
1791 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1792 asoc->send_sack = 1;
1793 asoc->data_pkts_seen = 0;
1794 asoc->last_data_chunk_from = NULL;
1795 asoc->last_control_chunk_from = NULL;
1796 asoc->last_net_cmt_send_started = NULL;
1797 if (asoc->mapping_array) {
1798 memset(asoc->mapping_array, 0,
1799 asoc->mapping_array_size);
1800 }
1801 if (asoc->nr_mapping_array) {
1802 memset(asoc->nr_mapping_array, 0,
1803 asoc->mapping_array_size);
1804 }
1805 SCTP_TCB_UNLOCK(stcb);
1806 SCTP_INP_INFO_WLOCK();
1807 SCTP_INP_WLOCK(stcb->sctp_ep);
1808 SCTP_TCB_LOCK(stcb);
1809 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1810 /* send up all the data */
1811 SCTP_TCB_SEND_LOCK(stcb);
1812
1813 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1814 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1815 stcb->asoc.strmout[i].chunks_on_queues = 0;
1816#if defined(SCTP_DETAILED_STR_STATS)
1817 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1818 asoc->strmout[i].abandoned_sent[j] = 0;
1819 asoc->strmout[i].abandoned_unsent[j] = 0;
1820 }
1821#else
1822 asoc->strmout[i].abandoned_sent[0] = 0;
1823 asoc->strmout[i].abandoned_unsent[0] = 0;
1824#endif
1825 stcb->asoc.strmout[i].next_mid_ordered = 0;
1826 stcb->asoc.strmout[i].next_mid_unordered = 0;
1827 stcb->asoc.strmout[i].sid = i;
1828 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1829 }
1830 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
1831 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
1832 SCTP_FREE(strrst, SCTP_M_STRESET);
1833 }
1834 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
1835 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
1836 if (sq->data) {
1837 sctp_m_freem(sq->data);
1838 sq->data = NULL;
1839 }
1840 sctp_free_remote_addr(sq->whoFrom);
1841 sq->whoFrom = NULL;
1842 sq->stcb = NULL;
1843 sctp_free_a_readq(stcb, sq);
1844 }
1845 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
1846 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
1847 if (chk->data) {
1848 sctp_m_freem(chk->data);
1849 chk->data = NULL;
1850 }
1851 if (chk->holds_key_ref)
1852 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1853 sctp_free_remote_addr(chk->whoTo);
1854 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1855 SCTP_DECR_CHK_COUNT();
1856 }
1857 asoc->ctrl_queue_cnt = 0;
1858 asoc->str_reset = NULL;
1859 asoc->stream_reset_outstanding = 0;
1860 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
1861 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
1862 if (chk->data) {
1863 sctp_m_freem(chk->data);
1864 chk->data = NULL;
1865 }
1866 if (chk->holds_key_ref)
1867 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1868 sctp_free_remote_addr(chk->whoTo);
1869 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1870 SCTP_DECR_CHK_COUNT();
1871 }
1872 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
1873 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
1874 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1875 }
1876 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
1877 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
1878 if (aack->data != NULL) {
1879 sctp_m_freem(aack->data);
1880 }
1881 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
1882 }
1883
1884 /* process the INIT-ACK info (my info) */
1885 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1886 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1887
1888 /* pull from vtag hash */
1889 LIST_REMOVE(stcb, sctp_asocs);
1890 /* re-insert to new vtag position */
1891 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1892 SCTP_BASE_INFO(hashasocmark))];
1893 /*
1894 * put it in the bucket in the vtag hash of assoc's for the
1895 * system
1896 */
1897 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1898
1899 SCTP_TCB_SEND_UNLOCK(stcb);
1900 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1901 SCTP_INP_INFO_WUNLOCK();
1902 asoc->total_flight = 0;
1903 asoc->total_flight_count = 0;
1904 /* process the INIT info (peer's info) */
1905 if (sctp_process_init(init_cp, stcb) < 0) {
1906 if (how_indx < sizeof(asoc->cookie_how))
1907 asoc->cookie_how[how_indx] = 13;
1908 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1909 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1910 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1911 src, dst, sh, op_err,
1912 mflowtype, mflowid,
1913 vrf_id, net->port);
1914 return (NULL);
1915 }
1916 /*
1917 * since we did not send a HB make sure we don't double
1918 * things
1919 */
1920 net->hb_responded = 1;
1921
1922 if ((retval = sctp_load_addresses_from_init(stcb, m,
1923 init_offset + sizeof(struct sctp_init_chunk),
1924 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1925 if (how_indx < sizeof(asoc->cookie_how))
1926 asoc->cookie_how[how_indx] = 14;
1927 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1928 "Problem with address parameters");
1929 SCTPDBG(SCTP_DEBUG_INPUT1,
1930 "Load addresses from INIT causes an abort %d\n",
1931 retval);
1932 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1933 src, dst, sh, op_err,
1934 mflowtype, mflowid,
1935 vrf_id, net->port);
1936 return (NULL);
1937 }
1938 /* respond with a COOKIE-ACK */
1939 sctp_send_cookie_ack(stcb);
1940 if (how_indx < sizeof(asoc->cookie_how))
1941 asoc->cookie_how[how_indx] = 15;
1942 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE) &&
1943 (asoc->sctp_autoclose_ticks > 0)) {
1944 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1945 }
1946 return (stcb);
1947 }
1948 if (how_indx < sizeof(asoc->cookie_how))
1949 asoc->cookie_how[how_indx] = 16;
1950 /* all other cases... */
1951 SCTP_TCB_UNLOCK(stcb);
1952 return (NULL);
1953}
1954
1955/*
1956 * handle a state cookie for a new association m: input packet mbuf chain--
1957 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1958 * and the cookie signature does not exist offset: offset into mbuf to the
1959 * cookie-echo chunk length: length of the cookie chunk to: where the init
1960 * was from returns a new TCB
1961 */
1962static struct sctp_tcb *
1963sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1964 struct sockaddr *src, struct sockaddr *dst,
1965 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1966 struct sctp_inpcb *inp, struct sctp_nets **netp,
1967 struct sockaddr *init_src, int *notification,
1968 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1969 uint8_t mflowtype, uint32_t mflowid,
1970 uint32_t vrf_id, uint16_t port)
1971{
1972 struct sctp_tcb *stcb;
1973 struct sctp_init_chunk *init_cp, init_buf;
1974 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1975 union sctp_sockstore store;
1976 struct sctp_association *asoc;
1977 int init_offset, initack_offset, initack_limit;
1978 int error = 0;
1979 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1980
1981 /*
1982 * find and validate the INIT chunk in the cookie (peer's info) the
1983 * INIT should start after the cookie-echo header struct (chunk
1984 * header, state cookie header struct)
1985 */
1986 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1987 init_cp = (struct sctp_init_chunk *)
1988 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1989 (uint8_t *)&init_buf);
1990 if (init_cp == NULL) {
1991 /* could not pull a INIT chunk in cookie */
1992 SCTPDBG(SCTP_DEBUG_INPUT1,
1993 "process_cookie_new: could not pull INIT chunk hdr\n");
1994 return (NULL);
1995 }
1996 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1997 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
1998 return (NULL);
1999 }
2000 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2001 /*
2002 * find and validate the INIT-ACK chunk in the cookie (my info) the
2003 * INIT-ACK follows the INIT chunk
2004 */
2005 initack_cp = (struct sctp_init_ack_chunk *)
2006 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2007 (uint8_t *)&initack_buf);
2008 if (initack_cp == NULL) {
2009 /* could not pull INIT-ACK chunk in cookie */
2010 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2011 return (NULL);
2012 }
2013 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2014 return (NULL);
2015 }
2016 /*
2017 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2018 * "initack_limit" value. This is because the chk_length field
2019 * includes the length of the cookie, but the cookie is omitted when
2020 * the INIT and INIT_ACK are tacked onto the cookie...
2021 */
2022 initack_limit = offset + cookie_len;
2023
2024 /*
2025 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2026 * and popluate
2027 */
2028
2029 /*
2030 * Here we do a trick, we set in NULL for the proc/thread argument.
2031 * We do this since in effect we only use the p argument when the
2032 * socket is unbound and we must do an implicit bind. Since we are
2033 * getting a cookie, we cannot be unbound.
2034 */
2035 stcb = sctp_aloc_assoc(inp, init_src, &error,
2036 ntohl(initack_cp->init.initiate_tag),
2037 ntohl(initack_cp->init.initial_tsn), vrf_id,
2038 ntohs(initack_cp->init.num_outbound_streams),
2039 port,
2040 (struct thread *)NULL,
2041 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2042 if (stcb == NULL) {
2043 struct mbuf *op_err;
2044
2045 /* memory problem? */
2046 SCTPDBG(SCTP_DEBUG_INPUT1,
2047 "process_cookie_new: no room for another TCB!\n");
2048 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2049 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2050 src, dst, sh, op_err,
2051 mflowtype, mflowid,
2052 vrf_id, port);
2053 return (NULL);
2054 }
2055 asoc = &stcb->asoc;
2056 /* get scope variables out of cookie */
2057 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2058 asoc->scope.site_scope = cookie->site_scope;
2059 asoc->scope.local_scope = cookie->local_scope;
2060 asoc->scope.loopback_scope = cookie->loopback_scope;
2061
2062 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2063 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2064 struct mbuf *op_err;
2065
2066 /*
2067 * Houston we have a problem. The EP changed while the
2068 * cookie was in flight. Only recourse is to abort the
2069 * association.
2070 */
2071 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2072 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2073 src, dst, sh, op_err,
2074 mflowtype, mflowid,
2075 vrf_id, port);
2076 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2077 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2078 return (NULL);
2079 }
2080 /* process the INIT-ACK info (my info) */
2081 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2082
2083 /* process the INIT info (peer's info) */
2084 if (sctp_process_init(init_cp, stcb) < 0) {
2085 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2086 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2087 return (NULL);
2088 }
2089 /* load all addresses */
2090 if (sctp_load_addresses_from_init(stcb, m,
2091 init_offset + sizeof(struct sctp_init_chunk),
2092 initack_offset, src, dst, init_src, port) < 0) {
2093 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2094 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2095 return (NULL);
2096 }
2097 /*
2098 * verify any preceding AUTH chunk that was skipped
2099 */
2100 /* pull the local authentication parameters from the cookie/init-ack */
2101 sctp_auth_get_cookie_params(stcb, m,
2102 initack_offset + sizeof(struct sctp_init_ack_chunk),
2103 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2104 if (auth_skipped) {
2105 struct sctp_auth_chunk *auth;
2106
2107 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2108 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2109 } else {
2110 auth = NULL;
2111 }
2112 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2113 /* auth HMAC failed, dump the assoc and packet */
2114 SCTPDBG(SCTP_DEBUG_AUTH1,
2115 "COOKIE-ECHO: AUTH failed\n");
2116 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2117 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2118 return (NULL);
2119 } else {
2120 /* remaining chunks checked... good to go */
2121 stcb->asoc.authenticated = 1;
2122 }
2123 }
2124
2125 /*
2126 * if we're doing ASCONFs, check to see if we have any new local
2127 * addresses that need to get added to the peer (eg. addresses
2128 * changed while cookie echo in flight). This needs to be done
2129 * after we go to the OPEN state to do the correct asconf
2130 * processing. else, make sure we have the correct addresses in our
2131 * lists
2132 */
2133
2134 /* warning, we re-use sin, sin6, sa_store here! */
2135 /* pull in local_address (our "from" address) */
2136 switch (cookie->laddr_type) {
2137#ifdef INET
2138 case SCTP_IPV4_ADDRESS:
2139 /* source addr is IPv4 */
2140 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2141 store.sin.sin_family = AF_INET;
2142 store.sin.sin_len = sizeof(struct sockaddr_in);
2143 store.sin.sin_addr.s_addr = cookie->laddress[0];
2144 break;
2145#endif
2146#ifdef INET6
2147 case SCTP_IPV6_ADDRESS:
2148 /* source addr is IPv6 */
2149 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2150 store.sin6.sin6_family = AF_INET6;
2151 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2152 store.sin6.sin6_scope_id = cookie->scope_id;
2153 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2154 break;
2155#endif
2156 default:
2157 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2158 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2159 return (NULL);
2160 }
2161
2162 /* update current state */
2163 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2164 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2165 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2166 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2167 stcb->sctp_ep, stcb, NULL);
2168 }
2169 sctp_stop_all_cookie_timers(stcb);
2170 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2171 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2172
2173 /* set up to notify upper layer */
2174 *notification = SCTP_NOTIFY_ASSOC_UP;
2175 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2176 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2177 (!SCTP_IS_LISTENING(inp))) {
2178 /*
2179 * This is an endpoint that called connect() how it got a
2180 * cookie that is NEW is a bit of a mystery. It must be that
2181 * the INIT was sent, but before it got there.. a complete
2182 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2183 * should have went to the other code.. not here.. oh well..
2184 * a bit of protection is worth having..
2185 *
2186 * XXXMJ unlocked
2187 */
2188 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2189 soisconnected(stcb->sctp_socket);
2190 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2191 (SCTP_IS_LISTENING(inp))) {
2192 /*
2193 * We don't want to do anything with this one. Since it is
2194 * the listening guy. The timer will get started for
2195 * accepted connections in the caller.
2196 */
2197 ;
2198 }
2199 if (stcb->asoc.sctp_autoclose_ticks &&
2200 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2201 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2202 }
2203 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2204 *netp = sctp_findnet(stcb, init_src);
2205 if (*netp != NULL) {
2206 struct timeval old;
2207
2208 /*
2209 * Since we did not send a HB, make sure we don't double
2210 * things.
2211 */
2212 (*netp)->hb_responded = 1;
2213 /* Calculate the RTT. */
2214 old.tv_sec = cookie->time_entered.tv_sec;
2215 old.tv_usec = cookie->time_entered.tv_usec;
2216 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2217 }
2218 /* respond with a COOKIE-ACK */
2219 sctp_send_cookie_ack(stcb);
2220
2221 /*
2222 * check the address lists for any ASCONFs that need to be sent
2223 * AFTER the cookie-ack is sent
2224 */
2225 sctp_check_address_list(stcb, m,
2226 initack_offset + sizeof(struct sctp_init_ack_chunk),
2227 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2228 &store.sa, cookie->local_scope, cookie->site_scope,
2229 cookie->ipv4_scope, cookie->loopback_scope);
2230
2231 return (stcb);
2232}
2233
2234/*
2235 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2236 * we NEED to make sure we are not already using the vtag. If so we
2237 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2238 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2239 SCTP_BASE_INFO(hashasocmark))];
2240 LIST_FOREACH(stcb, head, sctp_asocs) {
2241 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2242 -- SEND ABORT - TRY AGAIN --
2243 }
2244 }
2245*/
2246
2247/*
2248 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2249 * existing (non-NULL) TCB
2250 */
2251static struct mbuf *
2252sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2253 struct sockaddr *src, struct sockaddr *dst,
2254 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2255 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2256 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2257 struct sctp_tcb **locked_tcb,
2258 uint8_t mflowtype, uint32_t mflowid,
2259 uint32_t vrf_id, uint16_t port)
2260{
2261 struct sctp_state_cookie *cookie;
2262 struct sctp_tcb *l_stcb = *stcb;
2263 struct sctp_inpcb *l_inp;
2264 struct sockaddr *to;
2265 struct sctp_pcb *ep;
2266 struct mbuf *m_sig;
2267 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2268 uint8_t *sig;
2269 uint8_t cookie_ok = 0;
2270 unsigned int sig_offset, cookie_offset;
2271 unsigned int cookie_len;
2272 struct timeval now;
2273 struct timeval time_entered, time_expires;
2274 int notification = 0;
2275 struct sctp_nets *netl;
2276 int had_a_existing_tcb = 0;
2277 int send_int_conf = 0;
2278#ifdef INET
2279 struct sockaddr_in sin;
2280#endif
2281#ifdef INET6
2282 struct sockaddr_in6 sin6;
2283#endif
2284
2285 SCTPDBG(SCTP_DEBUG_INPUT2,
2286 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2287
2288 if (inp_p == NULL) {
2289 return (NULL);
2290 }
2291 cookie = &cp->cookie;
2292 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2293 cookie_len = ntohs(cp->ch.chunk_length);
2294
2295 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2296 sizeof(struct sctp_init_chunk) +
2297 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2298 /* cookie too small */
2299 return (NULL);
2300 }
2301 if ((cookie->peerport != sh->src_port) ||
2302 (cookie->myport != sh->dest_port) ||
2303 (cookie->my_vtag != sh->v_tag)) {
2304 /*
2305 * invalid ports or bad tag. Note that we always leave the
2306 * v_tag in the header in network order and when we stored
2307 * it in the my_vtag slot we also left it in network order.
2308 * This maintains the match even though it may be in the
2309 * opposite byte order of the machine :->
2310 */
2311 return (NULL);
2312 }
2313 /*
2314 * split off the signature into its own mbuf (since it should not be
2315 * calculated in the sctp_hmac_m() call).
2316 */
2317 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2318 m_sig = m_split(m, sig_offset, M_NOWAIT);
2319 if (m_sig == NULL) {
2320 /* out of memory or ?? */
2321 return (NULL);
2322 }
2323#ifdef SCTP_MBUF_LOGGING
2324 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2325 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2326 }
2327#endif
2328
2329 /*
2330 * compute the signature/digest for the cookie
2331 */
2332 ep = &(*inp_p)->sctp_ep;
2333 l_inp = *inp_p;
2334 if (l_stcb) {
2335 SCTP_TCB_UNLOCK(l_stcb);
2336 }
2337 SCTP_INP_RLOCK(l_inp);
2338 if (l_stcb) {
2339 SCTP_TCB_LOCK(l_stcb);
2340 }
2341 /* which cookie is it? */
2342 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2343 (ep->current_secret_number != ep->last_secret_number)) {
2344 /* it's the old cookie */
2345 (void)sctp_hmac_m(SCTP_HMAC,
2346 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2347 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2348 } else {
2349 /* it's the current cookie */
2350 (void)sctp_hmac_m(SCTP_HMAC,
2351 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2352 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2353 }
2354 /* get the signature */
2355 SCTP_INP_RUNLOCK(l_inp);
2356 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2357 if (sig == NULL) {
2358 /* couldn't find signature */
2359 sctp_m_freem(m_sig);
2360 return (NULL);
2361 }
2362 /* compare the received digest with the computed digest */
2363 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2364 /* try the old cookie? */
2365 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2366 (ep->current_secret_number != ep->last_secret_number)) {
2367 /* compute digest with old */
2368 (void)sctp_hmac_m(SCTP_HMAC,
2369 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2370 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2371 /* compare */
2372 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2373 cookie_ok = 1;
2374 }
2375 } else {
2376 cookie_ok = 1;
2377 }
2378
2379 /*
2380 * Now before we continue we must reconstruct our mbuf so that
2381 * normal processing of any other chunks will work.
2382 */
2383 {
2384 struct mbuf *m_at;
2385
2386 m_at = m;
2387 while (SCTP_BUF_NEXT(m_at) != NULL) {
2388 m_at = SCTP_BUF_NEXT(m_at);
2389 }
2390 SCTP_BUF_NEXT(m_at) = m_sig;
2391 }
2392
2393 if (cookie_ok == 0) {
2394 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2395 SCTPDBG(SCTP_DEBUG_INPUT2,
2396 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2397 (uint32_t)offset, cookie_offset, sig_offset);
2398 return (NULL);
2399 }
2400
2401 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2402 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2403 return (NULL);
2404 }
2405 time_entered.tv_sec = cookie->time_entered.tv_sec;
2406 time_entered.tv_usec = cookie->time_entered.tv_usec;
2407 if ((time_entered.tv_sec < 0) ||
2408 (time_entered.tv_usec < 0) ||
2409 (time_entered.tv_usec >= 1000000)) {
2410 /* Invalid time stamp. Cookie must have been modified. */
2411 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2412 return (NULL);
2413 }
2414 (void)SCTP_GETTIME_TIMEVAL(&now);
2415 if (timevalcmp(&now, &time_entered, <)) {
2416 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2417 return (NULL);
2418 }
2419 /*
2420 * Check the cookie timestamps to be sure it's not stale.
2421 * cookie_life is in ticks, so we convert to seconds.
2422 */
2423 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2424 time_expires.tv_usec = time_entered.tv_usec;
2425 if (timevalcmp(&now, &time_expires, >)) {
2426 /* cookie is stale! */
2427 struct mbuf *op_err;
2428 struct sctp_error_stale_cookie *cause;
2429 struct timeval diff;
2430 uint32_t staleness;
2431
2432 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2433 0, M_NOWAIT, 1, MT_DATA);
2434 if (op_err == NULL) {
2435 /* FOOBAR */
2436 return (NULL);
2437 }
2438 /* Set the len */
2439 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2440 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2441 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2442 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2443 diff = now;
2444 timevalsub(&diff, &time_expires);
2445 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2446 staleness = UINT32_MAX;
2447 } else {
2448 staleness = (uint32_t)diff.tv_sec * 1000000;
2449 }
2450 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2451 staleness += (uint32_t)diff.tv_usec;
2452 } else {
2453 staleness = UINT32_MAX;
2454 }
2455 cause->stale_time = htonl(staleness);
2456 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2457 mflowtype, mflowid, l_inp->fibnum,
2458 vrf_id, port);
2459 return (NULL);
2460 }
2461 /*
2462 * Now we must see with the lookup address if we have an existing
2463 * asoc. This will only happen if we were in the COOKIE-WAIT state
2464 * and a INIT collided with us and somewhere the peer sent the
2465 * cookie on another address besides the single address our assoc
2466 * had for him. In this case we will have one of the tie-tags set at
2467 * least AND the address field in the cookie can be used to look it
2468 * up.
2469 */
2470 to = NULL;
2471 switch (cookie->addr_type) {
2472#ifdef INET6
2473 case SCTP_IPV6_ADDRESS:
2474 memset(&sin6, 0, sizeof(sin6));
2475 sin6.sin6_family = AF_INET6;
2476 sin6.sin6_len = sizeof(sin6);
2477 sin6.sin6_port = sh->src_port;
2478 sin6.sin6_scope_id = cookie->scope_id;
2479 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2480 sizeof(sin6.sin6_addr.s6_addr));
2481 to = (struct sockaddr *)&sin6;
2482 break;
2483#endif
2484#ifdef INET
2485 case SCTP_IPV4_ADDRESS:
2486 memset(&sin, 0, sizeof(sin));
2487 sin.sin_family = AF_INET;
2488 sin.sin_len = sizeof(sin);
2489 sin.sin_port = sh->src_port;
2490 sin.sin_addr.s_addr = cookie->address[0];
2491 to = (struct sockaddr *)&sin;
2492 break;
2493#endif
2494 default:
2495 /* This should not happen */
2496 return (NULL);
2497 }
2498 if (*stcb == NULL) {
2499 /* Yep, lets check */
2500 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2501 if (*stcb == NULL) {
2502 /*
2503 * We should have only got back the same inp. If we
2504 * got back a different ep we have a problem. The
2505 * original findep got back l_inp and now
2506 */
2507 if (l_inp != *inp_p) {
2508 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2509 }
2510 } else {
2511 if (*locked_tcb == NULL) {
2512 /*
2513 * In this case we found the assoc only
2514 * after we locked the create lock. This
2515 * means we are in a colliding case and we
2516 * must make sure that we unlock the tcb if
2517 * its one of the cases where we throw away
2518 * the incoming packets.
2519 */
2520 *locked_tcb = *stcb;
2521
2522 /*
2523 * We must also increment the inp ref count
2524 * since the ref_count flags was set when we
2525 * did not find the TCB, now we found it
2526 * which reduces the refcount.. we must
2527 * raise it back out to balance it all :-)
2528 */
2529 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2530 if ((*stcb)->sctp_ep != l_inp) {
2531 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2532 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2533 }
2534 }
2535 }
2536 }
2537
2538 cookie_len -= SCTP_SIGNATURE_SIZE;
2539 if (*stcb == NULL) {
2540 /* this is the "normal" case... get a new TCB */
2541 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2542 cookie, cookie_len, *inp_p,
2543 netp, to, &notification,
2544 auth_skipped, auth_offset, auth_len,
2545 mflowtype, mflowid,
2546 vrf_id, port);
2547 } else {
2548 /* this is abnormal... cookie-echo on existing TCB */
2549 had_a_existing_tcb = 1;
2550 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2551 src, dst, sh,
2552 cookie, cookie_len, *inp_p, *stcb, netp, to,
2553 &notification, auth_skipped, auth_offset, auth_len,
2554 mflowtype, mflowid,
2555 vrf_id, port);
2556 if (*stcb == NULL) {
2557 *locked_tcb = NULL;
2558 }
2559 }
2560
2561 if (*stcb == NULL) {
2562 /* still no TCB... must be bad cookie-echo */
2563 return (NULL);
2564 }
2565 if (*netp != NULL) {
2566 (*netp)->flowtype = mflowtype;
2567 (*netp)->flowid = mflowid;
2568 }
2569 /*
2570 * Ok, we built an association so confirm the address we sent the
2571 * INIT-ACK to.
2572 */
2573 netl = sctp_findnet(*stcb, to);
2574 /*
2575 * This code should in theory NOT run but
2576 */
2577 if (netl == NULL) {
2578 /* TSNH! Huh, why do I need to add this address here? */
2579 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2580 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2581 return (NULL);
2582 }
2583 netl = sctp_findnet(*stcb, to);
2584 }
2585 if (netl) {
2586 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2587 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2588 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2589 netl);
2590 send_int_conf = 1;
2591 }
2592 }
2593 sctp_start_net_timers(*stcb);
2594 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2595 if (!had_a_existing_tcb ||
2596 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2597 /*
2598 * If we have a NEW cookie or the connect never
2599 * reached the connected state during collision we
2600 * must do the TCP accept thing.
2601 */
2602 struct socket *so, *oso;
2603 struct sctp_inpcb *inp;
2604
2605 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2606 /*
2607 * For a restart we will keep the same
2608 * socket, no need to do anything. I THINK!!
2609 */
2610 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2611 if (send_int_conf) {
2612 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2613 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2614 }
2615 return (m);
2616 }
2617 oso = (*inp_p)->sctp_socket;
2618 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2619 SCTP_TCB_UNLOCK((*stcb));
2620 CURVNET_SET(oso->so_vnet);
2621 so = sonewconn(oso, 0
2622 );
2623 CURVNET_RESTORE();
2624 SCTP_TCB_LOCK((*stcb));
2625 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2626
2627 if (so == NULL) {
2628 struct mbuf *op_err;
2629
2630 /* Too many sockets */
2631 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2632 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2633 sctp_abort_association(*inp_p, NULL, m, iphlen,
2634 src, dst, sh, op_err,
2635 mflowtype, mflowid,
2636 vrf_id, port);
2637 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2638 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2639 return (NULL);
2640 }
2641 inp = (struct sctp_inpcb *)so->so_pcb;
2642 SCTP_INP_INCR_REF(inp);
2643 /*
2644 * We add the unbound flag here so that if we get an
2645 * soabort() before we get the move_pcb done, we
2646 * will properly cleanup.
2647 */
2648 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2649 SCTP_PCB_FLAGS_CONNECTED |
2650 SCTP_PCB_FLAGS_IN_TCPPOOL |
2651 SCTP_PCB_FLAGS_UNBOUND |
2652 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2653 SCTP_PCB_FLAGS_DONT_WAKE);
2654 inp->sctp_features = (*inp_p)->sctp_features;
2655 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2656 inp->sctp_socket = so;
2657 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2658 inp->max_cwnd = (*inp_p)->max_cwnd;
2659 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2660 inp->ecn_supported = (*inp_p)->ecn_supported;
2661 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2662 inp->auth_supported = (*inp_p)->auth_supported;
2663 inp->asconf_supported = (*inp_p)->asconf_supported;
2664 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2665 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2666 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2667 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2668 inp->sctp_context = (*inp_p)->sctp_context;
2669 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2670 inp->fibnum = (*inp_p)->fibnum;
2671 /*
2672 * copy in the authentication parameters from the
2673 * original endpoint
2674 */
2675 if (inp->sctp_ep.local_hmacs)
2676 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2677 inp->sctp_ep.local_hmacs =
2678 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2679 if (inp->sctp_ep.local_auth_chunks)
2680 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2681 inp->sctp_ep.local_auth_chunks =
2682 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2683
2684 /*
2685 * Now we must move it from one hash table to
2686 * another and get the tcb in the right place.
2687 */
2688
2689 /*
2690 * This is where the one-2-one socket is put into
2691 * the accept state waiting for the accept!
2692 */
2693 if (*stcb) {
2694 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2695 }
2696 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2697
2698 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2699 SCTP_TCB_UNLOCK((*stcb));
2700
2701 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2702 0);
2703 SCTP_TCB_LOCK((*stcb));
2704 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2705
2706 /*
2707 * now we must check to see if we were aborted while
2708 * the move was going on and the lock/unlock
2709 * happened.
2710 */
2711 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2712 /*
2713 * yep it was, we leave the assoc attached
2714 * to the socket since the sctp_inpcb_free()
2715 * call will send an abort for us.
2716 */
2717 SCTP_INP_DECR_REF(inp);
2718 return (NULL);
2719 }
2720 SCTP_INP_DECR_REF(inp);
2721 /* Switch over to the new guy */
2722 *inp_p = inp;
2723 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2724 if (send_int_conf) {
2725 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2726 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2727 }
2728
2729 /*
2730 * Pull it from the incomplete queue and wake the
2731 * guy
2732 */
2733 soisconnected(so);
2734 return (m);
2735 }
2736 }
2737 if (notification) {
2738 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2739 }
2740 if (send_int_conf) {
2741 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2742 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2743 }
2744 return (m);
2745}
2746
2747static void
2748sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2749 struct sctp_tcb *stcb, struct sctp_nets *net)
2750{
2751 /* cp must not be used, others call this without a c-ack :-) */
2752 struct sctp_association *asoc;
2753 struct sctp_tmit_chunk *chk;
2754
2755 SCTPDBG(SCTP_DEBUG_INPUT2,
2756 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2757 if ((stcb == NULL) || (net == NULL)) {
2758 return;
2759 }
2760
2761 asoc = &stcb->asoc;
2762 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2763 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2764 asoc->overall_error_count,
2765 0,
2766 SCTP_FROM_SCTP_INPUT,
2767 __LINE__);
2768 }
2769 asoc->overall_error_count = 0;
2770 sctp_stop_all_cookie_timers(stcb);
2771 /* process according to association state */
2772 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2773 /* state change only needed when I am in right state */
2774 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2775 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2776 sctp_start_net_timers(stcb);
2777 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2778 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2779 stcb->sctp_ep, stcb, NULL);
2780 }
2781 /* update RTO */
2782 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2783 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2784 if (asoc->overall_error_count == 0) {
2785 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2786 SCTP_RTT_FROM_NON_DATA);
2787 }
2788 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2789 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2790 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2791 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2792 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2793 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2794 soisconnected(stcb->sctp_socket);
2795 }
2796 }
2797 /*
2798 * since we did not send a HB make sure we don't double
2799 * things
2800 */
2801 net->hb_responded = 1;
2802
2803 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2804 /*
2805 * We don't need to do the asconf thing, nor hb or
2806 * autoclose if the socket is closed.
2807 */
2808 goto closed_socket;
2809 }
2810
2811 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2812 stcb, net);
2813
2814 if (stcb->asoc.sctp_autoclose_ticks &&
2815 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2816 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2817 stcb->sctp_ep, stcb, NULL);
2818 }
2819 /*
2820 * send ASCONF if parameters are pending and ASCONFs are
2821 * allowed (eg. addresses changed when init/cookie echo were
2822 * in flight)
2823 */
2824 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2825 (stcb->asoc.asconf_supported == 1) &&
2826 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2827#ifdef SCTP_TIMER_BASED_ASCONF
2828 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2829 stcb->sctp_ep, stcb,
2830 stcb->asoc.primary_destination);
2831#else
2832 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2833 SCTP_ADDR_NOT_LOCKED);
2834#endif
2835 }
2836 }
2837closed_socket:
2838 /* Toss the cookie if I can */
2839 sctp_toss_old_cookies(stcb, asoc);
2840 /* Restart the timer if we have pending data */
2841 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2842 if (chk->whoTo != NULL) {
2843 break;
2844 }
2845 }
2846 if (chk != NULL) {
2847 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2848 }
2849}
2850
2851static void
2852sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2853 struct sctp_tcb *stcb)
2854{
2855 struct sctp_nets *net;
2856 struct sctp_tmit_chunk *lchk;
2857 struct sctp_ecne_chunk bkup;
2858 uint8_t override_bit;
2859 uint32_t tsn, window_data_tsn;
2860 int len;
2861 unsigned int pkt_cnt;
2862
2863 len = ntohs(cp->ch.chunk_length);
2864 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2865 /* Its the old format */
2866 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2867 bkup.num_pkts_since_cwr = htonl(1);
2868 cp = &bkup;
2869 }
2870 SCTP_STAT_INCR(sctps_recvecne);
2871 tsn = ntohl(cp->tsn);
2872 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2873 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2874 if (lchk == NULL) {
2875 window_data_tsn = stcb->asoc.sending_seq - 1;
2876 } else {
2877 window_data_tsn = lchk->rec.data.tsn;
2878 }
2879
2880 /* Find where it was sent to if possible. */
2881 net = NULL;
2882 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2883 if (lchk->rec.data.tsn == tsn) {
2884 net = lchk->whoTo;
2885 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2886 break;
2887 }
2888 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2889 break;
2890 }
2891 }
2892 if (net == NULL) {
2893 /*
2894 * What to do. A previous send of a CWR was possibly lost.
2895 * See how old it is, we may have it marked on the actual
2896 * net.
2897 */
2898 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2899 if (tsn == net->last_cwr_tsn) {
2900 /* Found him, send it off */
2901 break;
2902 }
2903 }
2904 if (net == NULL) {
2905 /*
2906 * If we reach here, we need to send a special CWR
2907 * that says hey, we did this a long time ago and
2908 * you lost the response.
2909 */
2910 net = TAILQ_FIRST(&stcb->asoc.nets);
2911 if (net == NULL) {
2912 /* TSNH */
2913 return;
2914 }
2915 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2916 } else {
2917 override_bit = 0;
2918 }
2919 } else {
2920 override_bit = 0;
2921 }
2922 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2923 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2924 /*
2925 * JRS - Use the congestion control given in the pluggable
2926 * CC module
2927 */
2928 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2929 /*
2930 * We reduce once every RTT. So we will only lower cwnd at
2931 * the next sending seq i.e. the window_data_tsn
2932 */
2933 net->cwr_window_tsn = window_data_tsn;
2934 net->ecn_ce_pkt_cnt += pkt_cnt;
2935 net->lost_cnt = pkt_cnt;
2936 net->last_cwr_tsn = tsn;
2937 } else {
2938 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2939 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2940 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2941 /*
2942 * Another loss in the same window update how many
2943 * marks/packets lost we have had.
2944 */
2945 int cnt = 1;
2946
2947 if (pkt_cnt > net->lost_cnt) {
2948 /* Should be the case */
2949 cnt = (pkt_cnt - net->lost_cnt);
2950 net->ecn_ce_pkt_cnt += cnt;
2951 }
2952 net->lost_cnt = pkt_cnt;
2953 net->last_cwr_tsn = tsn;
2954 /*
2955 * Most CC functions will ignore this call, since we
2956 * are in-window yet of the initial CE the peer saw.
2957 */
2958 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2959 }
2960 }
2961 /*
2962 * We always send a CWR this way if our previous one was lost our
2963 * peer will get an update, or if it is not time again to reduce we
2964 * still get the cwr to the peer. Note we set the override when we
2965 * could not find the TSN on the chunk or the destination network.
2966 */
2967 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2968}
2969
2970static void
2971sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2972{
2973 /*
2974 * Here we get a CWR from the peer. We must look in the outqueue and
2975 * make sure that we have a covered ECNE in the control chunk part.
2976 * If so remove it.
2977 */
2978 struct sctp_tmit_chunk *chk, *nchk;
2979 struct sctp_ecne_chunk *ecne;
2980 int override;
2981 uint32_t cwr_tsn;
2982
2983 cwr_tsn = ntohl(cp->tsn);
2984 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2985 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2986 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2987 continue;
2988 }
2989 if ((override == 0) && (chk->whoTo != net)) {
2990 /* Must be from the right src unless override is set */
2991 continue;
2992 }
2993 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2994 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2995 /* this covers this ECNE, we can remove it */
2996 stcb->asoc.ecn_echo_cnt_onq--;
2997 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
2998 sctp_next);
2999 stcb->asoc.ctrl_queue_cnt--;
3000 sctp_m_freem(chk->data);
3001 chk->data = NULL;
3002 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3003 if (override == 0) {
3004 break;
3005 }
3006 }
3007 }
3008}
3009
3010static void
3011sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3012 struct sctp_tcb *stcb, struct sctp_nets *net)
3013{
3014
3015 SCTPDBG(SCTP_DEBUG_INPUT2,
3016 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3017 if (stcb == NULL)
3018 return;
3019
3020 /* process according to association state */
3021 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3022 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3023 SCTPDBG(SCTP_DEBUG_INPUT2,
3024 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3025 SCTP_TCB_UNLOCK(stcb);
3026 return;
3027 }
3028 /* notify upper layer protocol */
3029 if (stcb->sctp_socket) {
3030 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3031 }
3032#ifdef INVARIANTS
3033 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3034 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3035 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3036 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3037 }
3038#endif
3039 /* stop the timer */
3040 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3041 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3042 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3043 /* free the TCB */
3044 SCTPDBG(SCTP_DEBUG_INPUT2,
3045 "sctp_handle_shutdown_complete: calls free-asoc\n");
3046 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3047 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3048 return;
3049}
3050
3051static int
3052process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3053 struct sctp_nets *net, uint8_t flg)
3054{
3055 switch (desc->chunk_type) {
3056 case SCTP_DATA:
3057 case SCTP_IDATA:
3058 /* find the tsn to resend (possibly) */
3059 {
3060 uint32_t tsn;
3061 struct sctp_tmit_chunk *tp1;
3062
3063 tsn = ntohl(desc->tsn_ifany);
3064 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3065 if (tp1->rec.data.tsn == tsn) {
3066 /* found it */
3067 break;
3068 }
3069 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3070 /* not found */
3071 tp1 = NULL;
3072 break;
3073 }
3074 }
3075 if (tp1 == NULL) {
3076 /*
3077 * Do it the other way , aka without paying
3078 * attention to queue seq order.
3079 */
3080 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3081 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3082 if (tp1->rec.data.tsn == tsn) {
3083 /* found it */
3084 break;
3085 }
3086 }
3087 }
3088 if (tp1 == NULL) {
3089 SCTP_STAT_INCR(sctps_pdrptsnnf);
3090 }
3091 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3092 if (((flg & SCTP_BADCRC) == 0) &&
3093 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3094 return (0);
3095 }
3096 if ((stcb->asoc.peers_rwnd == 0) &&
3097 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3098 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3099 return (0);
3100 }
3101 if (stcb->asoc.peers_rwnd == 0 &&
3102 (flg & SCTP_FROM_MIDDLE_BOX)) {
3103 SCTP_STAT_INCR(sctps_pdrpdizrw);
3104 return (0);
3105 }
3106 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3107 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3108 /* Payload not matching. */
3109 SCTP_STAT_INCR(sctps_pdrpbadd);
3110 return (-1);
3111 }
3112 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3113 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3114 /* Payload not matching. */
3115 SCTP_STAT_INCR(sctps_pdrpbadd);
3116 return (-1);
3117 }
3118 if (tp1->do_rtt) {
3119 /*
3120 * this guy had a RTO calculation
3121 * pending on it, cancel it
3122 */
3123 if (tp1->whoTo->rto_needed == 0) {
3124 tp1->whoTo->rto_needed = 1;
3125 }
3126 tp1->do_rtt = 0;
3127 }
3128 SCTP_STAT_INCR(sctps_pdrpmark);
3129 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3130 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3131 /*
3132 * mark it as if we were doing a FR, since
3133 * we will be getting gap ack reports behind
3134 * the info from the router.
3135 */
3136 tp1->rec.data.doing_fast_retransmit = 1;
3137 /*
3138 * mark the tsn with what sequences can
3139 * cause a new FR.
3140 */
3141 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3142 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3143 } else {
3144 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3145 }
3146
3147 /* restart the timer */
3148 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3149 stcb, tp1->whoTo,
3150 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3151 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3152 stcb, tp1->whoTo);
3153
3154 /* fix counts and things */
3155 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3156 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3157 tp1->whoTo->flight_size,
3158 tp1->book_size,
3159 (uint32_t)(uintptr_t)stcb,
3160 tp1->rec.data.tsn);
3161 }
3162 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3163 sctp_flight_size_decrease(tp1);
3164 sctp_total_flight_decrease(stcb, tp1);
3165 }
3166 tp1->sent = SCTP_DATAGRAM_RESEND;
3167 } {
3168 /* audit code */
3169 unsigned int audit;
3170
3171 audit = 0;
3172 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3173 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3174 audit++;
3175 }
3176 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3177 sctp_next) {
3178 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3179 audit++;
3180 }
3181 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3182 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3183 audit, stcb->asoc.sent_queue_retran_cnt);
3184#ifndef SCTP_AUDITING_ENABLED
3185 stcb->asoc.sent_queue_retran_cnt = audit;
3186#endif
3187 }
3188 }
3189 }
3190 break;
3191 case SCTP_ASCONF:
3192 {
3193 struct sctp_tmit_chunk *asconf;
3194
3195 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3196 sctp_next) {
3197 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3198 break;
3199 }
3200 }
3201 if (asconf) {
3202 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3203 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3204 asconf->sent = SCTP_DATAGRAM_RESEND;
3205 asconf->snd_count--;
3206 }
3207 }
3208 break;
3209 case SCTP_INITIATION:
3210 /* resend the INIT */
3211 stcb->asoc.dropped_special_cnt++;
3212 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3213 /*
3214 * If we can get it in, in a few attempts we do
3215 * this, otherwise we let the timer fire.
3216 */
3217 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3218 stcb, net,
3219 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3220 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3221 }
3222 break;
3223 case SCTP_SELECTIVE_ACK:
3224 case SCTP_NR_SELECTIVE_ACK:
3225 /* resend the sack */
3226 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3227 break;
3228 case SCTP_HEARTBEAT_REQUEST:
3229 /* resend a demand HB */
3230 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3231 /*
3232 * Only retransmit if we KNOW we wont destroy the
3233 * tcb
3234 */
3235 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3236 }
3237 break;
3238 case SCTP_SHUTDOWN:
3239 sctp_send_shutdown(stcb, net);
3240 break;
3241 case SCTP_SHUTDOWN_ACK:
3242 sctp_send_shutdown_ack(stcb, net);
3243 break;
3244 case SCTP_COOKIE_ECHO:
3245 {
3246 struct sctp_tmit_chunk *cookie;
3247
3248 cookie = NULL;
3249 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3250 sctp_next) {
3251 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3252 break;
3253 }
3254 }
3255 if (cookie) {
3256 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3257 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3258 cookie->sent = SCTP_DATAGRAM_RESEND;
3259 sctp_stop_all_cookie_timers(stcb);
3260 }
3261 }
3262 break;
3263 case SCTP_COOKIE_ACK:
3264 sctp_send_cookie_ack(stcb);
3265 break;
3266 case SCTP_ASCONF_ACK:
3267 /* resend last asconf ack */
3268 sctp_send_asconf_ack(stcb);
3269 break;
3270 case SCTP_IFORWARD_CUM_TSN:
3271 case SCTP_FORWARD_CUM_TSN:
3272 send_forward_tsn(stcb, &stcb->asoc);
3273 break;
3274 /* can't do anything with these */
3275 case SCTP_PACKET_DROPPED:
3276 case SCTP_INITIATION_ACK: /* this should not happen */
3277 case SCTP_HEARTBEAT_ACK:
3278 case SCTP_ABORT_ASSOCIATION:
3279 case SCTP_OPERATION_ERROR:
3280 case SCTP_SHUTDOWN_COMPLETE:
3281 case SCTP_ECN_ECHO:
3282 case SCTP_ECN_CWR:
3283 default:
3284 break;
3285 }
3286 return (0);
3287}
3288
3289void
3290sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3291{
3292 uint32_t i;
3293 uint16_t temp;
3294
3295 /*
3296 * We set things to 0xffffffff since this is the last delivered
3297 * sequence and we will be sending in 0 after the reset.
3298 */
3299
3300 if (number_entries) {
3301 for (i = 0; i < number_entries; i++) {
3302 temp = ntohs(list[i]);
3303 if (temp >= stcb->asoc.streamincnt) {
3304 continue;
3305 }
3306 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3307 }
3308 } else {
3309 list = NULL;
3310 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3311 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3312 }
3313 }
3314 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3315}
3316
3317static void
3318sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3319{
3320 uint32_t i;
3321 uint16_t temp;
3322
3323 if (number_entries > 0) {
3324 for (i = 0; i < number_entries; i++) {
3325 temp = ntohs(list[i]);
3326 if (temp >= stcb->asoc.streamoutcnt) {
3327 /* no such stream */
3328 continue;
3329 }
3330 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3331 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3332 }
3333 } else {
3334 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3335 stcb->asoc.strmout[i].next_mid_ordered = 0;
3336 stcb->asoc.strmout[i].next_mid_unordered = 0;
3337 }
3338 }
3339 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3340}
3341
3342static void
3343sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3344{
3345 uint32_t i;
3346 uint16_t temp;
3347
3348 if (number_entries > 0) {
3349 for (i = 0; i < number_entries; i++) {
3350 temp = ntohs(list[i]);
3351 if (temp >= stcb->asoc.streamoutcnt) {
3352 /* no such stream */
3353 continue;
3354 }
3355 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3356 }
3357 } else {
3358 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3359 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3360 }
3361 }
3362}
3363
3364struct sctp_stream_reset_request *
3365sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3366{
3367 struct sctp_association *asoc;
3368 struct sctp_chunkhdr *ch;
3369 struct sctp_stream_reset_request *r;
3370 struct sctp_tmit_chunk *chk;
3371 int len, clen;
3372
3373 asoc = &stcb->asoc;
3374 chk = asoc->str_reset;
3375 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3376 (chk == NULL)) {
3377 asoc->stream_reset_outstanding = 0;
3378 return (NULL);
3379 }
3380 if (chk->data == NULL) {
3381 return (NULL);
3382 }
3383 if (bchk != NULL) {
3384 /* he wants a copy of the chk pointer */
3385 *bchk = chk;
3386 }
3387 clen = chk->send_size;
3388 ch = mtod(chk->data, struct sctp_chunkhdr *);
3389 r = (struct sctp_stream_reset_request *)(ch + 1);
3390 if (ntohl(r->request_seq) == seq) {
3391 /* found it */
3392 return (r);
3393 }
3394 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3395 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3396 /* move to the next one, there can only be a max of two */
3397 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3398 if (ntohl(r->request_seq) == seq) {
3399 return (r);
3400 }
3401 }
3402 /* that seq is not here */
3403 return (NULL);
3404}
3405
3406static void
3407sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3408{
3409 struct sctp_association *asoc;
3410 struct sctp_tmit_chunk *chk;
3411
3412 asoc = &stcb->asoc;
3413 chk = asoc->str_reset;
3414 if (chk == NULL) {
3415 return;
3416 }
3417 asoc->str_reset = NULL;
3418 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3419 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3420 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3421 asoc->ctrl_queue_cnt--;
3422 if (chk->data) {
3423 sctp_m_freem(chk->data);
3424 chk->data = NULL;
3425 }
3426 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3427}
3428
3429static int
3430sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3431 uint32_t seq, uint32_t action,
3432 struct sctp_stream_reset_response *respin)
3433{
3434 uint16_t type;
3435 int lparam_len;
3436 struct sctp_association *asoc = &stcb->asoc;
3437 struct sctp_tmit_chunk *chk;
3438 struct sctp_stream_reset_request *req_param;
3439 struct sctp_stream_reset_out_request *req_out_param;
3440 struct sctp_stream_reset_in_request *req_in_param;
3441 uint32_t number_entries;
3442
3443 if (asoc->stream_reset_outstanding == 0) {
3444 /* duplicate */
3445 return (0);
3446 }
3447 if (seq == stcb->asoc.str_reset_seq_out) {
3448 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3449 if (req_param != NULL) {
3450 stcb->asoc.str_reset_seq_out++;
3451 type = ntohs(req_param->ph.param_type);
3452 lparam_len = ntohs(req_param->ph.param_length);
3453 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3454 int no_clear = 0;
3455
3456 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3457 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3458 asoc->stream_reset_out_is_outstanding = 0;
3459 if (asoc->stream_reset_outstanding)
3460 asoc->stream_reset_outstanding--;
3461 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3462 /* do it */
3463 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3464 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3465 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3466 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3467 /*
3468 * Set it up so we don't stop
3469 * retransmitting
3470 */
3471 asoc->stream_reset_outstanding++;
3472 stcb->asoc.str_reset_seq_out--;
3473 asoc->stream_reset_out_is_outstanding = 1;
3474 no_clear = 1;
3475 } else {
3476 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3477 }
3478 if (no_clear == 0) {
3479 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3480 }
3481 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3482 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3483 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3484 if (asoc->stream_reset_outstanding)
3485 asoc->stream_reset_outstanding--;
3486 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3487 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3488 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3489 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3490 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3491 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3492 }
3493 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3494 /* Ok we now may have more streams */
3495 int num_stream;
3496
3497 num_stream = stcb->asoc.strm_pending_add_size;
3498 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3499 /* TSNH */
3500 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3501 }
3502 stcb->asoc.strm_pending_add_size = 0;
3503 if (asoc->stream_reset_outstanding)
3504 asoc->stream_reset_outstanding--;
3505 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3506 /* Put the new streams into effect */
3507 int i;
3508
3509 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3510 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3511 }
3512 asoc->streamoutcnt += num_stream;
3513 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3514 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3515 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3516 SCTP_STREAM_CHANGE_DENIED);
3517 } else {
3518 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3519 SCTP_STREAM_CHANGE_FAILED);
3520 }
3521 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3522 if (asoc->stream_reset_outstanding)
3523 asoc->stream_reset_outstanding--;
3524 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3525 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3526 SCTP_STREAM_CHANGE_DENIED);
3527 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3528 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3529 SCTP_STREAM_CHANGE_FAILED);
3530 }
3531 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3537 struct sctp_stream_reset_response_tsn *resp;
3538 struct sctp_forward_tsn_chunk fwdtsn;
3539 int abort_flag = 0;
3540
3541 if (respin == NULL) {
3542 /* huh ? */
3543 return (0);
3544 }
3545 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3546 return (0);
3547 }
3548 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3549 resp = (struct sctp_stream_reset_response_tsn *)respin;
3550 asoc->stream_reset_outstanding--;
3551 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3552 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3553 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3554 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3555 if (abort_flag) {
3556 return (1);
3557 }
3558 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3559 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3560 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3561 }
3562
3563 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3564 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3565 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3566
3567 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3568 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3569
3570 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3571 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3572
3573 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3574 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3575 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3576 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3577 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3578 SCTP_ASSOC_RESET_DENIED);
3579 } else {
3580 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3581 SCTP_ASSOC_RESET_FAILED);
3582 }
3583 }
3584 /* get rid of the request and get the request flags */
3585 if (asoc->stream_reset_outstanding == 0) {
3586 sctp_clean_up_stream_reset(stcb);
3587 }
3588 }
3589 }
3590 if (asoc->stream_reset_outstanding == 0) {
3591 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3592 }
3593 return (0);
3594}
3595
3596static void
3597sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3598 struct sctp_tmit_chunk *chk,
3599 struct sctp_stream_reset_in_request *req, int trunc)
3600{
3601 uint32_t seq;
3602 int len, i;
3603 int number_entries;
3604 uint16_t temp;
3605
3606 /*
3607 * peer wants me to send a str-reset to him for my outgoing seq's if
3608 * seq_in is right.
3609 */
3610 struct sctp_association *asoc = &stcb->asoc;
3611
3612 seq = ntohl(req->request_seq);
3613 if (asoc->str_reset_seq_in == seq) {
3614 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3615 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3616 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3617 } else if (trunc) {
3618 /* Can't do it, since they exceeded our buffer size */
3619 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3620 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3621 len = ntohs(req->ph.param_length);
3622 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3623 if (number_entries) {
3624 for (i = 0; i < number_entries; i++) {
3625 temp = ntohs(req->list_of_streams[i]);
3626 if (temp >= stcb->asoc.streamoutcnt) {
3627 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3628 goto bad_boy;
3629 }
3630 req->list_of_streams[i] = temp;
3631 }
3632 for (i = 0; i < number_entries; i++) {
3633 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3634 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3635 }
3636 }
3637 } else {
3638 /* Its all */
3639 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3640 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3641 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3642 }
3643 }
3644 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3645 } else {
3646 /* Can't do it, since we have sent one out */
3647 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3648 }
3649bad_boy:
3650 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3651 asoc->str_reset_seq_in++;
3652 } else if (asoc->str_reset_seq_in - 1 == seq) {
3653 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3654 } else if (asoc->str_reset_seq_in - 2 == seq) {
3655 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3656 } else {
3657 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3658 }
3659 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3660}
3661
3662static int
3663sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3664 struct sctp_tmit_chunk *chk,
3665 struct sctp_stream_reset_tsn_request *req)
3666{
3667 /* reset all in and out and update the tsn */
3668 /*
3669 * A) reset my str-seq's on in and out. B) Select a receive next,
3670 * and set cum-ack to it. Also process this selected number as a
3671 * fwd-tsn as well. C) set in the response my next sending seq.
3672 */
3673 struct sctp_forward_tsn_chunk fwdtsn;
3674 struct sctp_association *asoc = &stcb->asoc;
3675 int abort_flag = 0;
3676 uint32_t seq;
3677
3678 seq = ntohl(req->request_seq);
3679 if (asoc->str_reset_seq_in == seq) {
3680 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3681 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3682 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3683 } else {
3684 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3685 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3686 fwdtsn.ch.chunk_flags = 0;
3687 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3688 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3689 if (abort_flag) {
3690 return (1);
3691 }
3692 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3693 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3694 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3695 }
3696 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3697 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3698 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3699 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3700 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3701 atomic_add_int(&asoc->sending_seq, 1);
3702 /* save off historical data for retrans */
3703 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3704 asoc->last_sending_seq[0] = asoc->sending_seq;
3705 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3706 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3707 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3708 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3709 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3710 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3711 }
3712 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3713 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3714 asoc->str_reset_seq_in++;
3715 } else if (asoc->str_reset_seq_in - 1 == seq) {
3716 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3717 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3718 } else if (asoc->str_reset_seq_in - 2 == seq) {
3719 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3720 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3721 } else {
3722 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3723 }
3724 return (0);
3725}
3726
3727static void
3728sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3729 struct sctp_tmit_chunk *chk,
3730 struct sctp_stream_reset_out_request *req, int trunc)
3731{
3732 uint32_t seq, tsn;
3733 int number_entries, len;
3734 struct sctp_association *asoc = &stcb->asoc;
3735
3736 seq = ntohl(req->request_seq);
3737
3738 /* now if its not a duplicate we process it */
3739 if (asoc->str_reset_seq_in == seq) {
3740 len = ntohs(req->ph.param_length);
3741 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3742 /*
3743 * the sender is resetting, handle the list issue.. we must
3744 * a) verify if we can do the reset, if so no problem b) If
3745 * we can't do the reset we must copy the request. c) queue
3746 * it, and setup the data in processor to trigger it off
3747 * when needed and dequeue all the queued data.
3748 */
3749 tsn = ntohl(req->send_reset_at_tsn);
3750
3751 /* move the reset action back one */
3752 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3753 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3754 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3755 } else if (trunc) {
3756 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3757 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3758 /* we can do it now */
3759 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3760 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3761 } else {
3762 /*
3763 * we must queue it up and thus wait for the TSN's
3764 * to arrive that are at or before tsn
3765 */
3766 struct sctp_stream_reset_list *liste;
3767 int siz;
3768
3769 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3770 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3771 siz, SCTP_M_STRESET);
3772 if (liste == NULL) {
3773 /* gak out of memory */
3774 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3775 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3776 return;
3777 }
3778 liste->seq = seq;
3779 liste->tsn = tsn;
3780 liste->number_entries = number_entries;
3781 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3782 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3783 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3784 }
3785 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3786 asoc->str_reset_seq_in++;
3787 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3788 /*
3789 * one seq back, just echo back last action since my
3790 * response was lost.
3791 */
3792 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3793 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3794 /*
3795 * two seq back, just echo back last action since my
3796 * response was lost.
3797 */
3798 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3799 } else {
3800 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3801 }
3802}
3803
3804static void
3805sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3806 struct sctp_stream_reset_add_strm *str_add)
3807{
3808 /*
3809 * Peer is requesting to add more streams. If its within our
3810 * max-streams we will allow it.
3811 */
3812 uint32_t num_stream, i;
3813 uint32_t seq;
3814 struct sctp_association *asoc = &stcb->asoc;
3815 struct sctp_queued_to_read *ctl, *nctl;
3816
3817 /* Get the number. */
3818 seq = ntohl(str_add->request_seq);
3819 num_stream = ntohs(str_add->number_of_streams);
3820 /* Now what would be the new total? */
3821 if (asoc->str_reset_seq_in == seq) {
3822 num_stream += stcb->asoc.streamincnt;
3823 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3824 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3825 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3826 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3827 (num_stream > 0xffff)) {
3828 /* We must reject it they ask for to many */
3829 denied:
3830 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3831 } else {
3832 /* Ok, we can do that :-) */
3833 struct sctp_stream_in *oldstrm;
3834
3835 /* save off the old */
3836 oldstrm = stcb->asoc.strmin;
3837 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3838 (num_stream * sizeof(struct sctp_stream_in)),
3839 SCTP_M_STRMI);
3840 if (stcb->asoc.strmin == NULL) {
3841 stcb->asoc.strmin = oldstrm;
3842 goto denied;
3843 }
3844 /* copy off the old data */
3845 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3846 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3847 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3848 stcb->asoc.strmin[i].sid = i;
3849 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3850 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3851 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3852 /* now anything on those queues? */
3853 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3854 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3855 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3856 }
3857 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3858 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3859 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3860 }
3861 }
3862 /* Init the new streams */
3863 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3864 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3865 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3866 stcb->asoc.strmin[i].sid = i;
3867 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3868 stcb->asoc.strmin[i].pd_api_started = 0;
3869 stcb->asoc.strmin[i].delivery_started = 0;
3870 }
3871 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3872 /* update the size */
3873 stcb->asoc.streamincnt = num_stream;
3874 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3875 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3876 }
3877 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3878 asoc->str_reset_seq_in++;
3879 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3880 /*
3881 * one seq back, just echo back last action since my
3882 * response was lost.
3883 */
3884 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3885 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3886 /*
3887 * two seq back, just echo back last action since my
3888 * response was lost.
3889 */
3890 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3891 } else {
3892 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3893 }
3894}
3895
3896static void
3897sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3898 struct sctp_stream_reset_add_strm *str_add)
3899{
3900 /*
3901 * Peer is requesting to add more streams. If its within our
3902 * max-streams we will allow it.
3903 */
3904 uint16_t num_stream;
3905 uint32_t seq;
3906 struct sctp_association *asoc = &stcb->asoc;
3907
3908 /* Get the number. */
3909 seq = ntohl(str_add->request_seq);
3910 num_stream = ntohs(str_add->number_of_streams);
3911 /* Now what would be the new total? */
3912 if (asoc->str_reset_seq_in == seq) {
3913 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3914 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3915 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3916 } else if (stcb->asoc.stream_reset_outstanding) {
3917 /* We must reject it we have something pending */
3918 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3919 } else {
3920 /* Ok, we can do that :-) */
3921 int mychk;
3922
3923 mychk = stcb->asoc.streamoutcnt;
3924 mychk += num_stream;
3925 if (mychk < 0x10000) {
3926 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3927 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3928 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3929 }
3930 } else {
3931 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3932 }
3933 }
3934 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3935 asoc->str_reset_seq_in++;
3936 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3937 /*
3938 * one seq back, just echo back last action since my
3939 * response was lost.
3940 */
3941 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3942 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3943 /*
3944 * two seq back, just echo back last action since my
3945 * response was lost.
3946 */
3947 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3948 } else {
3949 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3950 }
3951}
3952
3953#ifdef __GNUC__
3954__attribute__((noinline))
3955#endif
3956static int
3957sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3958 struct sctp_chunkhdr *ch_req)
3959{
3960 uint16_t remaining_length, param_len, ptype;
3961 struct sctp_paramhdr pstore;
3962 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3963 uint32_t seq = 0;
3964 int num_req = 0;
3965 int trunc = 0;
3966 struct sctp_tmit_chunk *chk;
3967 struct sctp_chunkhdr *ch;
3968 struct sctp_paramhdr *ph;
3969 int ret_code = 0;
3970 int num_param = 0;
3971
3972 /* now it may be a reset or a reset-response */
3973 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3974
3975 /* setup for adding the response */
3976 sctp_alloc_a_chunk(stcb, chk);
3977 if (chk == NULL) {
3978 return (ret_code);
3979 }
3980 chk->copy_by_ref = 0;
3981 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3982 chk->rec.chunk_id.can_take_data = 0;
3983 chk->flags = 0;
3984 chk->asoc = &stcb->asoc;
3985 chk->no_fr_allowed = 0;
3986 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3987 chk->book_size_scale = 0;
3988 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3989 if (chk->data == NULL) {
3990strres_nochunk:
3991 if (chk->data) {
3992 sctp_m_freem(chk->data);
3993 chk->data = NULL;
3994 }
3995 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3996 return (ret_code);
3997 }
3998 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
3999
4000 /* setup chunk parameters */
4001 chk->sent = SCTP_DATAGRAM_UNSENT;
4002 chk->snd_count = 0;
4003 chk->whoTo = NULL;
4004
4005 ch = mtod(chk->data, struct sctp_chunkhdr *);
4006 ch->chunk_type = SCTP_STREAM_RESET;
4007 ch->chunk_flags = 0;
4008 ch->chunk_length = htons(chk->send_size);
4009 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4010 offset += sizeof(struct sctp_chunkhdr);
4011 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4012 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4013 if (ph == NULL) {
4014 /* TSNH */
4015 break;
4016 }
4017 param_len = ntohs(ph->param_length);
4018 if ((param_len > remaining_length) ||
4019 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4020 /* bad parameter length */
4021 break;
4022 }
4023 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4024 (uint8_t *)&cstore);
4025 if (ph == NULL) {
4026 /* TSNH */
4027 break;
4028 }
4029 ptype = ntohs(ph->param_type);
4030 num_param++;
4031 if (param_len > sizeof(cstore)) {
4032 trunc = 1;
4033 } else {
4034 trunc = 0;
4035 }
4036 if (num_param > SCTP_MAX_RESET_PARAMS) {
4037 /* hit the max of parameters already sorry.. */
4038 break;
4039 }
4040 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4041 struct sctp_stream_reset_out_request *req_out;
4042
4043 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4044 break;
4045 }
4046 req_out = (struct sctp_stream_reset_out_request *)ph;
4047 num_req++;
4048 if (stcb->asoc.stream_reset_outstanding) {
4049 seq = ntohl(req_out->response_seq);
4050 if (seq == stcb->asoc.str_reset_seq_out) {
4051 /* implicit ack */
4052 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4053 }
4054 }
4055 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4056 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4057 struct sctp_stream_reset_add_strm *str_add;
4058
4059 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4060 break;
4061 }
4062 str_add = (struct sctp_stream_reset_add_strm *)ph;
4063 num_req++;
4064 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4065 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4066 struct sctp_stream_reset_add_strm *str_add;
4067
4068 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4069 break;
4070 }
4071 str_add = (struct sctp_stream_reset_add_strm *)ph;
4072 num_req++;
4073 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4074 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4075 struct sctp_stream_reset_in_request *req_in;
4076
4077 num_req++;
4078 req_in = (struct sctp_stream_reset_in_request *)ph;
4079 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4080 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4081 struct sctp_stream_reset_tsn_request *req_tsn;
4082
4083 num_req++;
4084 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4085 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4086 ret_code = 1;
4087 goto strres_nochunk;
4088 }
4089 /* no more */
4090 break;
4091 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4092 struct sctp_stream_reset_response *resp;
4093 uint32_t result;
4094
4095 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4096 break;
4097 }
4098 resp = (struct sctp_stream_reset_response *)ph;
4099 seq = ntohl(resp->response_seq);
4100 result = ntohl(resp->result);
4101 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4102 ret_code = 1;
4103 goto strres_nochunk;
4104 }
4105 } else {
4106 break;
4107 }
4108 offset += SCTP_SIZE32(param_len);
4109 if (remaining_length >= SCTP_SIZE32(param_len)) {
4110 remaining_length -= SCTP_SIZE32(param_len);
4111 } else {
4112 remaining_length = 0;
4113 }
4114 }
4115 if (num_req == 0) {
4116 /* we have no response free the stuff */
4117 goto strres_nochunk;
4118 }
4119 /* ok we have a chunk to link in */
4120 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4121 chk,
4122 sctp_next);
4123 stcb->asoc.ctrl_queue_cnt++;
4124 return (ret_code);
4125}
4126
4127/*
4128 * Handle a router or endpoints report of a packet loss, there are two ways
4129 * to handle this, either we get the whole packet and must disect it
4130 * ourselves (possibly with truncation and or corruption) or it is a summary
4131 * from a middle box that did the disectting for us.
4132 */
4133static void
4134sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4135 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4136{
4137 struct sctp_chunk_desc desc;
4138 struct sctp_chunkhdr *chk_hdr;
4139 struct sctp_data_chunk *data_chunk;
4140 struct sctp_idata_chunk *idata_chunk;
4141 uint32_t bottle_bw, on_queue;
4142 uint32_t offset, chk_len;
4143 uint16_t pktdrp_len;
4144 uint8_t pktdrp_flags;
4145
4146 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4147 ("PKTDROP chunk too small"));
4148 pktdrp_flags = cp->ch.chunk_flags;
4149 pktdrp_len = ntohs(cp->ch.chunk_length);
4150 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4151 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4152 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4153 /* The peer plays games with us. */
4154 return;
4155 }
4156 }
4157 limit -= sizeof(struct sctp_pktdrop_chunk);
4158 offset = 0;
4159 if (offset == limit) {
4160 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4161 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4162 }
4163 } else if (offset + sizeof(struct sctphdr) > limit) {
4164 /* Only a partial SCTP common header. */
4165 SCTP_STAT_INCR(sctps_pdrpcrupt);
4166 offset = limit;
4167 } else {
4168 /* XXX: Check embedded SCTP common header. */
4169 offset += sizeof(struct sctphdr);
4170 }
4171 /* Now parse through the chunks themselves. */
4172 while (offset < limit) {
4173 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4174 SCTP_STAT_INCR(sctps_pdrpcrupt);
4175 break;
4176 }
4177 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4178 desc.chunk_type = chk_hdr->chunk_type;
4179 /* get amount we need to move */
4180 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4181 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4182 /* Someone is lying... */
4183 break;
4184 }
4185 if (desc.chunk_type == SCTP_DATA) {
4186 if (stcb->asoc.idata_supported) {
4187 /* Some is playing games with us. */
4188 break;
4189 }
4190 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4191 /* Some is playing games with us. */
4192 break;
4193 }
4194 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4195 /*
4196 * Not enough data bytes available in the
4197 * chunk.
4198 */
4199 SCTP_STAT_INCR(sctps_pdrpnedat);
4200 goto next_chunk;
4201 }
4202 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4203 /* Not enough data in buffer. */
4204 break;
4205 }
4206 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4207 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4208 desc.tsn_ifany = data_chunk->dp.tsn;
4209 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4210 SCTP_STAT_INCR(sctps_pdrpmbda);
4211 }
4212 } else if (desc.chunk_type == SCTP_IDATA) {
4213 if (!stcb->asoc.idata_supported) {
4214 /* Some is playing games with us. */
4215 break;
4216 }
4217 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4218 /* Some is playing games with us. */
4219 break;
4220 }
4221 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4222 /*
4223 * Not enough data bytes available in the
4224 * chunk.
4225 */
4226 SCTP_STAT_INCR(sctps_pdrpnedat);
4227 goto next_chunk;
4228 }
4229 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4230 /* Not enough data in buffer. */
4231 break;
4232 }
4233 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4234 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4235 desc.tsn_ifany = idata_chunk->dp.tsn;
4236 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4237 SCTP_STAT_INCR(sctps_pdrpmbda);
4238 }
4239 } else {
4240 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4241 SCTP_STAT_INCR(sctps_pdrpmbct);
4242 }
4243 }
4244 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4245 SCTP_STAT_INCR(sctps_pdrppdbrk);
4246 break;
4247 }
4248next_chunk:
4249 offset += SCTP_SIZE32(chk_len);
4250 }
4251 /* Now update any rwnd --- possibly */
4252 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4253 /* From a peer, we get a rwnd report */
4254 uint32_t a_rwnd;
4255
4256 SCTP_STAT_INCR(sctps_pdrpfehos);
4257
4258 bottle_bw = ntohl(cp->bottle_bw);
4259 on_queue = ntohl(cp->current_onq);
4260 if (bottle_bw && on_queue) {
4261 /* a rwnd report is in here */
4262 if (bottle_bw > on_queue)
4263 a_rwnd = bottle_bw - on_queue;
4264 else
4265 a_rwnd = 0;
4266
4267 if (a_rwnd == 0)
4268 stcb->asoc.peers_rwnd = 0;
4269 else {
4270 if (a_rwnd > stcb->asoc.total_flight) {
4271 stcb->asoc.peers_rwnd =
4272 a_rwnd - stcb->asoc.total_flight;
4273 } else {
4274 stcb->asoc.peers_rwnd = 0;
4275 }
4276 if (stcb->asoc.peers_rwnd <
4277 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4278 /* SWS sender side engages */
4279 stcb->asoc.peers_rwnd = 0;
4280 }
4281 }
4282 }
4283 } else {
4284 SCTP_STAT_INCR(sctps_pdrpfmbox);
4285 }
4286
4287 /* now middle boxes in sat networks get a cwnd bump */
4288 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4289 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4290 (stcb->asoc.sat_network)) {
4291 /*
4292 * This is debatable but for sat networks it makes sense
4293 * Note if a T3 timer has went off, we will prohibit any
4294 * changes to cwnd until we exit the t3 loss recovery.
4295 */
4296 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4297 net, cp, &bottle_bw, &on_queue);
4298 }
4299}
4300
4301/*
4302 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4303 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4304 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4305 * length of the complete packet outputs: - length: modified to remaining
4306 * length after control processing - netp: modified to new sctp_nets after
4307 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4308 * bad packet,...) otherwise return the tcb for this packet
4309 */
4310#ifdef __GNUC__
4311__attribute__((noinline))
4312#endif
4313static struct sctp_tcb *
4314sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4315 struct sockaddr *src, struct sockaddr *dst,
4316 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4317 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4318 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4319 uint32_t vrf_id, uint16_t port)
4320{
4321 struct sctp_association *asoc;
4322 struct mbuf *op_err;
4323 char msg[SCTP_DIAG_INFO_LEN];
4324 uint32_t vtag_in;
4325 int num_chunks = 0; /* number of control chunks processed */
4326 uint32_t chk_length, contiguous;
4327 int ret;
4328 int abort_no_unlock = 0;
4329 int ecne_seen = 0;
4330 int abort_flag;
4331
4332 /*
4333 * How big should this be, and should it be alloc'd? Lets try the
4334 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4335 * until we get into jumbo grams and such..
4336 */
4337 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4338 int got_auth = 0;
4339 uint32_t auth_offset = 0, auth_len = 0;
4340 int auth_skipped = 0;
4341 int asconf_cnt = 0;
4342
4343 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4344 iphlen, *offset, length, (void *)stcb);
4345
4346 if (stcb) {
4347 SCTP_TCB_LOCK_ASSERT(stcb);
4348 }
4349 /* validate chunk header length... */
4350 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4351 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4352 ntohs(ch->chunk_length));
4353 *offset = length;
4354 return (stcb);
4355 }
4356 /*
4357 * validate the verification tag
4358 */
4359 vtag_in = ntohl(sh->v_tag);
4360
4361 if (ch->chunk_type == SCTP_INITIATION) {
4362 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4363 ntohs(ch->chunk_length), vtag_in);
4364 if (vtag_in != 0) {
4365 /* protocol error- silently discard... */
4366 SCTP_STAT_INCR(sctps_badvtag);
4367 if (stcb != NULL) {
4368 SCTP_TCB_UNLOCK(stcb);
4369 }
4370 return (NULL);
4371 }
4372 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4373 /*
4374 * If there is no stcb, skip the AUTH chunk and process
4375 * later after a stcb is found (to validate the lookup was
4376 * valid.
4377 */
4378 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4379 (stcb == NULL) &&
4380 (inp->auth_supported == 1)) {
4381 /* save this chunk for later processing */
4382 auth_skipped = 1;
4383 auth_offset = *offset;
4384 auth_len = ntohs(ch->chunk_length);
4385
4386 /* (temporarily) move past this chunk */
4387 *offset += SCTP_SIZE32(auth_len);
4388 if (*offset >= length) {
4389 /* no more data left in the mbuf chain */
4390 *offset = length;
4391 return (NULL);
4392 }
4393 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4394 sizeof(struct sctp_chunkhdr), chunk_buf);
4395 }
4396 if (ch == NULL) {
4397 /* Help */
4398 *offset = length;
4399 return (stcb);
4400 }
4401 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4402 goto process_control_chunks;
4403 }
4404 /*
4405 * first check if it's an ASCONF with an unknown src addr we
4406 * need to look inside to find the association
4407 */
4408 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4409 struct sctp_chunkhdr *asconf_ch = ch;
4410 uint32_t asconf_offset = 0, asconf_len = 0;
4411
4412 /* inp's refcount may be reduced */
4413 SCTP_INP_INCR_REF(inp);
4414
4415 asconf_offset = *offset;
4416 do {
4417 asconf_len = ntohs(asconf_ch->chunk_length);
4418 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4419 break;
4420 stcb = sctp_findassociation_ep_asconf(m,
4421 *offset,
4422 dst,
4423 sh, &inp, netp, vrf_id);
4424 if (stcb != NULL)
4425 break;
4426 asconf_offset += SCTP_SIZE32(asconf_len);
4427 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4428 sizeof(struct sctp_chunkhdr), chunk_buf);
4429 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4430 if (stcb == NULL) {
4431 /*
4432 * reduce inp's refcount if not reduced in
4433 * sctp_findassociation_ep_asconf().
4434 */
4435 SCTP_INP_DECR_REF(inp);
4436 }
4437
4438 /* now go back and verify any auth chunk to be sure */
4439 if (auth_skipped && (stcb != NULL)) {
4440 struct sctp_auth_chunk *auth;
4441
4442 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4443 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4444 got_auth = 1;
4445 auth_skipped = 0;
4446 } else {
4447 auth = NULL;
4448 }
4449 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4450 auth_offset)) {
4451 /* auth HMAC failed so dump it */
4452 *offset = length;
4453 return (stcb);
4454 } else {
4455 /* remaining chunks are HMAC checked */
4456 stcb->asoc.authenticated = 1;
4457 }
4458 }
4459 }
4460 if (stcb == NULL) {
4461 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4462 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4463 msg);
4464 /* no association, so it's out of the blue... */
4465 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4466 mflowtype, mflowid, inp->fibnum,
4467 vrf_id, port);
4468 *offset = length;
4469 return (NULL);
4470 }
4471 asoc = &stcb->asoc;
4472 /* ABORT and SHUTDOWN can use either v_tag... */
4473 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4474 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4475 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4476 /* Take the T-bit always into account. */
4477 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4478 (vtag_in == asoc->my_vtag)) ||
4479 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4480 (asoc->peer_vtag != htonl(0)) &&
4481 (vtag_in == asoc->peer_vtag))) {
4482 /* this is valid */
4483 } else {
4484 /* drop this packet... */
4485 SCTP_STAT_INCR(sctps_badvtag);
4486 if (stcb != NULL) {
4487 SCTP_TCB_UNLOCK(stcb);
4488 }
4489 return (NULL);
4490 }
4491 } else {
4492 /* for all other chunks, vtag must match */
4493 if (vtag_in != asoc->my_vtag) {
4494 /* invalid vtag... */
4495 SCTPDBG(SCTP_DEBUG_INPUT3,
4496 "invalid vtag: %xh, expect %xh\n",
4497 vtag_in, asoc->my_vtag);
4498 SCTP_STAT_INCR(sctps_badvtag);
4499 if (stcb != NULL) {
4500 SCTP_TCB_UNLOCK(stcb);
4501 }
4502 *offset = length;
4503 return (NULL);
4504 }
4505 }
4506 } /* end if !SCTP_COOKIE_ECHO */
4507 /*
4508 * process all control chunks...
4509 */
4510 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4511 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4512 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4513 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4514 /* implied cookie-ack.. we must have lost the ack */
4515 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4516 *netp);
4517 }
4518
4519process_control_chunks:
4520 while (IS_SCTP_CONTROL(ch)) {
4521 /* validate chunk length */
4522 chk_length = ntohs(ch->chunk_length);
4523 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4524 ch->chunk_type, chk_length);
4525 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4526 if (chk_length < sizeof(*ch) ||
4527 (*offset + (int)chk_length) > length) {
4528 *offset = length;
4529 return (stcb);
4530 }
4531 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4532 /*
4533 * INIT and INIT-ACK only gets the init ack "header" portion
4534 * only because we don't have to process the peer's COOKIE.
4535 * All others get a complete chunk.
4536 */
4537 switch (ch->chunk_type) {
4538 case SCTP_INITIATION:
4539 contiguous = sizeof(struct sctp_init_chunk);
4540 break;
4541 case SCTP_INITIATION_ACK:
4542 contiguous = sizeof(struct sctp_init_ack_chunk);
4543 break;
4544 default:
4545 contiguous = min(chk_length, sizeof(chunk_buf));
4546 break;
4547 }
4548 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4549 contiguous,
4550 chunk_buf);
4551 if (ch == NULL) {
4552 *offset = length;
4553 return (stcb);
4554 }
4555
4556 num_chunks++;
4557 /* Save off the last place we got a control from */
4558 if (stcb != NULL) {
4559 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4560 /*
4561 * allow last_control to be NULL if
4562 * ASCONF... ASCONF processing will find the
4563 * right net later
4564 */
4565 if ((netp != NULL) && (*netp != NULL))
4566 stcb->asoc.last_control_chunk_from = *netp;
4567 }
4568 }
4569#ifdef SCTP_AUDITING_ENABLED
4570 sctp_audit_log(0xB0, ch->chunk_type);
4571#endif
4572
4573 /* check to see if this chunk required auth, but isn't */
4574 if ((stcb != NULL) &&
4575 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4576 !stcb->asoc.authenticated) {
4577 /* "silently" ignore */
4578 SCTP_STAT_INCR(sctps_recvauthmissing);
4579 goto next_chunk;
4580 }
4581 switch (ch->chunk_type) {
4582 case SCTP_INITIATION:
4583 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4584 /* The INIT chunk must be the only chunk. */
4585 if ((num_chunks > 1) ||
4586 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4587 /*
4588 * RFC 4960bis requires stopping the
4589 * processing of the packet.
4590 */
4591 *offset = length;
4592 return (stcb);
4593 }
4594 /* Honor our resource limit. */
4595 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4596 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4597 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
4598 mflowtype, mflowid, inp->fibnum,
4599 vrf_id, port);
4600 *offset = length;
4601 if (stcb != NULL) {
4602 SCTP_TCB_UNLOCK(stcb);
4603 }
4604 return (NULL);
4605 }
4606 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4607 (struct sctp_init_chunk *)ch, inp,
4608 stcb, *netp,
4609 mflowtype, mflowid,
4610 vrf_id, port);
4611 *offset = length;
4612 if (stcb != NULL) {
4613 SCTP_TCB_UNLOCK(stcb);
4614 }
4615 return (NULL);
4616 break;
4617 case SCTP_PAD_CHUNK:
4618 break;
4619 case SCTP_INITIATION_ACK:
4620 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4621 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4622 /* We are not interested anymore */
4623 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4624 ;
4625 } else {
4626 *offset = length;
4627 if (stcb != NULL) {
4628 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4629 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4630 }
4631 return (NULL);
4632 }
4633 }
4634 /* The INIT-ACK chunk must be the only chunk. */
4635 if ((num_chunks > 1) ||
4636 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4637 *offset = length;
4638 return (stcb);
4639 }
4640 if ((netp != NULL) && (*netp != NULL)) {
4641 ret = sctp_handle_init_ack(m, iphlen, *offset,
4642 src, dst, sh,
4643 (struct sctp_init_ack_chunk *)ch,
4644 stcb, *netp,
4645 &abort_no_unlock,
4646 mflowtype, mflowid,
4647 vrf_id);
4648 } else {
4649 ret = -1;
4650 }
4651 *offset = length;
4652 if (abort_no_unlock) {
4653 return (NULL);
4654 }
4655 /*
4656 * Special case, I must call the output routine to
4657 * get the cookie echoed
4658 */
4659 if ((stcb != NULL) && (ret == 0)) {
4660 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4661 }
4662 return (stcb);
4663 break;
4664 case SCTP_SELECTIVE_ACK:
4665 case SCTP_NR_SELECTIVE_ACK:
4666 {
4667 int abort_now = 0;
4668 uint32_t a_rwnd, cum_ack;
4669 uint16_t num_seg, num_nr_seg, num_dup;
4670 uint8_t flags;
4671 int offset_seg, offset_dup;
4672
4673 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4674 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4675 SCTP_STAT_INCR(sctps_recvsacks);
4676 if (stcb == NULL) {
4677 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4678 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4679 break;
4680 }
4681 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4682 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4683 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4684 break;
4685 }
4686 } else {
4687 if (stcb->asoc.nrsack_supported == 0) {
4688 goto unknown_chunk;
4689 }
4690 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4691 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4692 break;
4693 }
4694 }
4695 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4696 /*-
4697 * If we have sent a shutdown-ack, we will pay no
4698 * attention to a sack sent in to us since
4699 * we don't care anymore.
4700 */
4701 break;
4702 }
4703 flags = ch->chunk_flags;
4704 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4705 struct sctp_sack_chunk *sack;
4706
4707 sack = (struct sctp_sack_chunk *)ch;
4708 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4709 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4710 num_nr_seg = 0;
4711 num_dup = ntohs(sack->sack.num_dup_tsns);
4712 a_rwnd = ntohl(sack->sack.a_rwnd);
4713 if (sizeof(struct sctp_sack_chunk) +
4714 num_seg * sizeof(struct sctp_gap_ack_block) +
4715 num_dup * sizeof(uint32_t) != chk_length) {
4716 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4717 break;
4718 }
4719 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4720 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4721 } else {
4722 struct sctp_nr_sack_chunk *nr_sack;
4723
4724 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4725 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4726 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4727 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4728 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4729 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4730 if (sizeof(struct sctp_nr_sack_chunk) +
4731 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4732 num_dup * sizeof(uint32_t) != chk_length) {
4733 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4734 break;
4735 }
4736 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4737 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4738 }
4739 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4740 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4741 cum_ack, num_seg, a_rwnd);
4742 stcb->asoc.seen_a_sack_this_pkt = 1;
4743 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4744 (num_seg == 0) && (num_nr_seg == 0) &&
4745 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4746 (stcb->asoc.saw_sack_with_frags == 0) &&
4747 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4748 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4749 /*
4750 * We have a SIMPLE sack having no
4751 * prior segments and data on sent
4752 * queue to be acked. Use the faster
4753 * path sack processing. We also
4754 * allow window update sacks with no
4755 * missing segments to go this way
4756 * too.
4757 */
4758 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4759 &abort_now, ecne_seen);
4760 } else {
4761 if ((netp != NULL) && (*netp != NULL)) {
4762 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4763 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4764 cum_ack, a_rwnd, ecne_seen);
4765 }
4766 }
4767 if (abort_now) {
4768 /* ABORT signal from sack processing */
4769 *offset = length;
4770 return (NULL);
4771 }
4772 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4773 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4774 (stcb->asoc.stream_queue_cnt == 0)) {
4775 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4776 }
4777 break;
4778 }
4779 case SCTP_HEARTBEAT_REQUEST:
4780 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4781 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4782 SCTP_STAT_INCR(sctps_recvheartbeat);
4783 sctp_send_heartbeat_ack(stcb, m, *offset,
4784 chk_length, *netp);
4785 }
4786 break;
4787 case SCTP_HEARTBEAT_ACK:
4788 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4789 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4790 /* Its not ours */
4791 break;
4792 }
4793 SCTP_STAT_INCR(sctps_recvheartbeatack);
4794 if ((netp != NULL) && (*netp != NULL)) {
4795 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4796 stcb, *netp);
4797 }
4798 break;
4799 case SCTP_ABORT_ASSOCIATION:
4800 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4801 (void *)stcb);
4802 *offset = length;
4803 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4804 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4805 return (NULL);
4806 } else {
4807 return (stcb);
4808 }
4809 } else {
4810 return (NULL);
4811 }
4812 break;
4813 case SCTP_SHUTDOWN:
4814 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4815 (void *)stcb);
4816 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4817 break;
4818 }
4819 if ((netp != NULL) && (*netp != NULL)) {
4820 abort_flag = 0;
4821 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4822 stcb, *netp, &abort_flag);
4823 if (abort_flag) {
4824 *offset = length;
4825 return (NULL);
4826 }
4827 }
4828 break;
4829 case SCTP_SHUTDOWN_ACK:
4830 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4831 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4832 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4833 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4834 *offset = length;
4835 return (NULL);
4836 }
4837 break;
4838 case SCTP_OPERATION_ERROR:
4839 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4840 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4841 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4842 *offset = length;
4843 return (NULL);
4844 }
4845 break;
4846 case SCTP_COOKIE_ECHO:
4847 SCTPDBG(SCTP_DEBUG_INPUT3,
4848 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4849 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4850 ;
4851 } else {
4852 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4853 /* We are not interested anymore */
4854 abend:
4855 if (stcb != NULL) {
4856 SCTP_TCB_UNLOCK(stcb);
4857 }
4858 *offset = length;
4859 return (NULL);
4860 }
4861 }
4862 /*-
4863 * First are we accepting? We do this again here
4864 * since it is possible that a previous endpoint WAS
4865 * listening responded to a INIT-ACK and then
4866 * closed. We opened and bound.. and are now no
4867 * longer listening.
4868 *
4869 * XXXGL: notes on checking listen queue length.
4870 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4871 * SOLISTENING(), because a listening "UDP type"
4872 * socket isn't listening in terms of the socket
4873 * layer. It is a normal data flow socket, that
4874 * can fork off new connections. Thus, we should
4875 * look into sol_qlen only in case we are !UDP.
4876 * 2) Checking sol_qlen in general requires locking
4877 * the socket, and this code lacks that.
4878 */
4879 if ((stcb == NULL) &&
4880 (!SCTP_IS_LISTENING(inp) ||
4881 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
4882 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4883 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4884 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4885 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4886 sctp_abort_association(inp, stcb, m, iphlen,
4887 src, dst, sh, op_err,
4888 mflowtype, mflowid,
4889 vrf_id, port);
4890 }
4891 *offset = length;
4892 return (NULL);
4893 } else {
4894 struct mbuf *ret_buf;
4895 struct sctp_inpcb *linp;
4896 struct sctp_tmit_chunk *chk;
4897
4898 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
4899 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4900 goto abend;
4901 }
4902
4903 if (stcb) {
4904 linp = NULL;
4905 } else {
4906 linp = inp;
4907 }
4908
4909 if (linp != NULL) {
4910 SCTP_ASOC_CREATE_LOCK(linp);
4911 }
4912
4913 if (netp != NULL) {
4914 struct sctp_tcb *locked_stcb;
4915
4916 locked_stcb = stcb;
4917 ret_buf =
4918 sctp_handle_cookie_echo(m, iphlen,
4919 *offset,
4920 src, dst,
4921 sh,
4922 (struct sctp_cookie_echo_chunk *)ch,
4923 &inp, &stcb, netp,
4924 auth_skipped,
4925 auth_offset,
4926 auth_len,
4927 &locked_stcb,
4928 mflowtype,
4929 mflowid,
4930 vrf_id,
4931 port);
4932 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4933 SCTP_TCB_UNLOCK(locked_stcb);
4934 }
4935 if (stcb != NULL) {
4936 SCTP_TCB_LOCK_ASSERT(stcb);
4937 }
4938 } else {
4939 ret_buf = NULL;
4940 }
4941 if (linp != NULL) {
4942 SCTP_ASOC_CREATE_UNLOCK(linp);
4943 }
4944 if (ret_buf == NULL) {
4945 if (stcb != NULL) {
4946 SCTP_TCB_UNLOCK(stcb);
4947 }
4948 SCTPDBG(SCTP_DEBUG_INPUT3,
4949 "GAK, null buffer\n");
4950 *offset = length;
4951 return (NULL);
4952 }
4953 /* if AUTH skipped, see if it verified... */
4954 if (auth_skipped) {
4955 got_auth = 1;
4956 auth_skipped = 0;
4957 }
4958 /* Restart the timer if we have pending data */
4959 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4960 if (chk->whoTo != NULL) {
4961 break;
4962 }
4963 }
4964 if (chk != NULL) {
4965 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4966 }
4967 }
4968 break;
4969 case SCTP_COOKIE_ACK:
4970 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4971 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4972 break;
4973 }
4974 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4975 /* We are not interested anymore */
4976 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4977 ;
4978 } else if (stcb) {
4979 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4980 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4981 *offset = length;
4982 return (NULL);
4983 }
4984 }
4985 if ((netp != NULL) && (*netp != NULL)) {
4986 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4987 }
4988 break;
4989 case SCTP_ECN_ECHO:
4990 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4991 if (stcb == NULL) {
4992 break;
4993 }
4994 if (stcb->asoc.ecn_supported == 0) {
4995 goto unknown_chunk;
4996 }
4997 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
4998 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
4999 break;
5000 }
5001 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5002 ecne_seen = 1;
5003 break;
5004 case SCTP_ECN_CWR:
5005 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5006 if (stcb == NULL) {
5007 break;
5008 }
5009 if (stcb->asoc.ecn_supported == 0) {
5010 goto unknown_chunk;
5011 }
5012 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5013 break;
5014 }
5015 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5016 break;
5017 case SCTP_SHUTDOWN_COMPLETE:
5018 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5019 /* must be first and only chunk */
5020 if ((num_chunks > 1) ||
5021 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5022 *offset = length;
5023 return (stcb);
5024 }
5025 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5026 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5027 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5028 stcb, *netp);
5029 *offset = length;
5030 return (NULL);
5031 }
5032 break;
5033 case SCTP_ASCONF:
5034 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5035 if (stcb != NULL) {
5036 if (stcb->asoc.asconf_supported == 0) {
5037 goto unknown_chunk;
5038 }
5039 sctp_handle_asconf(m, *offset, src,
5040 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5041 asconf_cnt++;
5042 }
5043 break;
5044 case SCTP_ASCONF_ACK:
5045 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5046 if (stcb == NULL) {
5047 break;
5048 }
5049 if (stcb->asoc.asconf_supported == 0) {
5050 goto unknown_chunk;
5051 }
5052 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5053 break;
5054 }
5055 if ((netp != NULL) && (*netp != NULL)) {
5056 /* He's alive so give him credit */
5057 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5058 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5059 stcb->asoc.overall_error_count,
5060 0,
5061 SCTP_FROM_SCTP_INPUT,
5062 __LINE__);
5063 }
5064 stcb->asoc.overall_error_count = 0;
5065 sctp_handle_asconf_ack(m, *offset,
5066 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5067 if (abort_no_unlock)
5068 return (NULL);
5069 }
5070 break;
5071 case SCTP_FORWARD_CUM_TSN:
5072 case SCTP_IFORWARD_CUM_TSN:
5073 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5074 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5075 if (stcb == NULL) {
5076 break;
5077 }
5078 if (stcb->asoc.prsctp_supported == 0) {
5079 goto unknown_chunk;
5080 }
5081 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5082 break;
5083 }
5084 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5085 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5086 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5087 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5088 } else {
5089 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5090 }
5091 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5092 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
5093 *offset = length;
5094 return (NULL);
5095 }
5096 *fwd_tsn_seen = 1;
5097 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5098 /* We are not interested anymore */
5099 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5100 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5101 *offset = length;
5102 return (NULL);
5103 }
5104 /*
5105 * For sending a SACK this looks like DATA chunks.
5106 */
5107 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5108 abort_flag = 0;
5109 sctp_handle_forward_tsn(stcb,
5110 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5111 if (abort_flag) {
5112 *offset = length;
5113 return (NULL);
5114 }
5115 break;
5116 case SCTP_STREAM_RESET:
5117 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5118 if (stcb == NULL) {
5119 break;
5120 }
5121 if (stcb->asoc.reconfig_supported == 0) {
5122 goto unknown_chunk;
5123 }
5124 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5125 break;
5126 }
5127 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5128 /* stop processing */
5129 *offset = length;
5130 return (NULL);
5131 }
5132 break;
5133 case SCTP_PACKET_DROPPED:
5134 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5135 if (stcb == NULL) {
5136 break;
5137 }
5138 if (stcb->asoc.pktdrop_supported == 0) {
5139 goto unknown_chunk;
5140 }
5141 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5142 break;
5143 }
5144 if ((netp != NULL) && (*netp != NULL)) {
5145 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5146 stcb, *netp,
5147 min(chk_length, contiguous));
5148 }
5149 break;
5150 case SCTP_AUTHENTICATION:
5151 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5152 if (stcb == NULL) {
5153 /* save the first AUTH for later processing */
5154 if (auth_skipped == 0) {
5155 auth_offset = *offset;
5156 auth_len = chk_length;
5157 auth_skipped = 1;
5158 }
5159 /* skip this chunk (temporarily) */
5160 break;
5161 }
5162 if (stcb->asoc.auth_supported == 0) {
5163 goto unknown_chunk;
5164 }
5165 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5166 (chk_length > (sizeof(struct sctp_auth_chunk) +
5167 SCTP_AUTH_DIGEST_LEN_MAX))) {
5168 /* Its not ours */
5169 *offset = length;
5170 return (stcb);
5171 }
5172 if (got_auth == 1) {
5173 /* skip this chunk... it's already auth'd */
5174 break;
5175 }
5176 got_auth = 1;
5177 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5178 /* auth HMAC failed so dump the packet */
5179 *offset = length;
5180 return (stcb);
5181 } else {
5182 /* remaining chunks are HMAC checked */
5183 stcb->asoc.authenticated = 1;
5184 }
5185 break;
5186
5187 default:
5188 unknown_chunk:
5189 /* it's an unknown chunk! */
5190 if ((ch->chunk_type & 0x40) &&
5191 (stcb != NULL) &&
5192 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5193 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5194 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5195 struct sctp_gen_error_cause *cause;
5196 int len;
5197
5198 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5199 0, M_NOWAIT, 1, MT_DATA);
5200 if (op_err != NULL) {
5201 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5202 cause = mtod(op_err, struct sctp_gen_error_cause *);
5203 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5204 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5205 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5206 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5207 if (SCTP_BUF_NEXT(op_err) != NULL) {
5208#ifdef SCTP_MBUF_LOGGING
5209 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5210 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5211 }
5212#endif
5213 sctp_queue_op_err(stcb, op_err);
5214 } else {
5215 sctp_m_freem(op_err);
5216 }
5217 }
5218 }
5219 if ((ch->chunk_type & 0x80) == 0) {
5220 /* discard this packet */
5221 *offset = length;
5222 return (stcb);
5223 } /* else skip this bad chunk and continue... */
5224 break;
5225 } /* switch (ch->chunk_type) */
5226
5227next_chunk:
5228 /* get the next chunk */
5229 *offset += SCTP_SIZE32(chk_length);
5230 if (*offset >= length) {
5231 /* no more data left in the mbuf chain */
5232 break;
5233 }
5234 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5235 sizeof(struct sctp_chunkhdr), chunk_buf);
5236 if (ch == NULL) {
5237 *offset = length;
5238 return (stcb);
5239 }
5240 } /* while */
5241
5242 if ((asconf_cnt > 0) && (stcb != NULL)) {
5243 sctp_send_asconf_ack(stcb);
5244 }
5245 return (stcb);
5246}
5247
5248/*
5249 * common input chunk processing (v4 and v6)
5250 */
5251void
5252sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5253 struct sockaddr *src, struct sockaddr *dst,
5254 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5255 uint8_t compute_crc,
5256 uint8_t ecn_bits,
5257 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5258 uint32_t vrf_id, uint16_t port)
5259{
5260 uint32_t high_tsn;
5261 int fwd_tsn_seen = 0, data_processed = 0;
5262 struct mbuf *m = *mm, *op_err;
5263 char msg[SCTP_DIAG_INFO_LEN];
5264 int un_sent;
5265 int cnt_ctrl_ready = 0;
5266 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5267 struct sctp_tcb *stcb = NULL;
5268 struct sctp_nets *net = NULL;
5269
5270 SCTP_STAT_INCR(sctps_recvdatagrams);
5271#ifdef SCTP_AUDITING_ENABLED
5272 sctp_audit_log(0xE0, 1);
5273 sctp_auditing(0, inp, stcb, net);
5274#endif
5275 if (compute_crc != 0) {
5276 uint32_t check, calc_check;
5277
5278 check = sh->checksum;
5279 sh->checksum = 0;
5280 calc_check = sctp_calculate_cksum(m, iphlen);
5281 sh->checksum = check;
5282 if (calc_check != check) {
5283 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5284 calc_check, check, (void *)m, length, iphlen);
5285 stcb = sctp_findassociation_addr(m, offset, src, dst,
5286 sh, ch, &inp, &net, vrf_id);
5287#if defined(INET) || defined(INET6)
5288 if ((ch->chunk_type != SCTP_INITIATION) &&
5289 (net != NULL) && (net->port != port)) {
5290 if (net->port == 0) {
5291 /* UDP encapsulation turned on. */
5292 net->mtu -= sizeof(struct udphdr);
5293 if (stcb->asoc.smallest_mtu > net->mtu) {
5294 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5295 }
5296 } else if (port == 0) {
5297 /* UDP encapsulation turned off. */
5298 net->mtu += sizeof(struct udphdr);
5299 /* XXX Update smallest_mtu */
5300 }
5301 net->port = port;
5302 }
5303#endif
5304 if (net != NULL) {
5305 net->flowtype = mflowtype;
5306 net->flowid = mflowid;
5307 }
5308 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5309 if ((inp != NULL) && (stcb != NULL)) {
5310 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5311 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5312 } else if ((inp != NULL) && (stcb == NULL)) {
5313 inp_decr = inp;
5314 }
5315 SCTP_STAT_INCR(sctps_badsum);
5316 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5317 goto out;
5318 }
5319 }
5320 /* Destination port of 0 is illegal, based on RFC4960. */
5321 if (sh->dest_port == 0) {
5322 SCTP_STAT_INCR(sctps_hdrops);
5323 goto out;
5324 }
5325 stcb = sctp_findassociation_addr(m, offset, src, dst,
5326 sh, ch, &inp, &net, vrf_id);
5327#if defined(INET) || defined(INET6)
5328 if ((ch->chunk_type != SCTP_INITIATION) &&
5329 (net != NULL) && (net->port != port)) {
5330 if (net->port == 0) {
5331 /* UDP encapsulation turned on. */
5332 net->mtu -= sizeof(struct udphdr);
5333 if (stcb->asoc.smallest_mtu > net->mtu) {
5334 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5335 }
5336 } else if (port == 0) {
5337 /* UDP encapsulation turned off. */
5338 net->mtu += sizeof(struct udphdr);
5339 /* XXX Update smallest_mtu */
5340 }
5341 net->port = port;
5342 }
5343#endif
5344 if (net != NULL) {
5345 net->flowtype = mflowtype;
5346 net->flowid = mflowid;
5347 }
5348 if (inp == NULL) {
5349 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5350 SCTP_STAT_INCR(sctps_noport);
5351 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5352 goto out;
5353 }
5354 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5355 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5356 sctp_send_shutdown_complete2(src, dst, sh,
5357 mflowtype, mflowid, fibnum,
5358 vrf_id, port);
5359 goto out;
5360 }
5361 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5362 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5363 goto out;
5364 }
5365 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5366 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5367 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5368 (ch->chunk_type != SCTP_INIT))) {
5369 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5370 "Out of the blue");
5371 sctp_send_abort(m, iphlen, src, dst,
5372 sh, 0, op_err,
5373 mflowtype, mflowid, fibnum,
5374 vrf_id, port);
5375 }
5376 }
5377 goto out;
5378 } else if (stcb == NULL) {
5379 inp_decr = inp;
5380 }
5381 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5382 (void *)m, iphlen, offset, length, (void *)stcb);
5383 if (stcb) {
5384 /* always clear this before beginning a packet */
5385 stcb->asoc.authenticated = 0;
5386 stcb->asoc.seen_a_sack_this_pkt = 0;
5387 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5388 (void *)stcb, stcb->asoc.state);
5389
5390 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5391 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5392 /*-
5393 * If we hit here, we had a ref count
5394 * up when the assoc was aborted and the
5395 * timer is clearing out the assoc, we should
5396 * NOT respond to any packet.. its OOTB.
5397 */
5398 SCTP_TCB_UNLOCK(stcb);
5399 stcb = NULL;
5400 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5401 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5402 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5403 msg);
5404 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5405 mflowtype, mflowid, inp->fibnum,
5406 vrf_id, port);
5407 goto out;
5408 }
5409 }
5410 if (IS_SCTP_CONTROL(ch)) {
5411 /* process the control portion of the SCTP packet */
5412 /* sa_ignore NO_NULL_CHK */
5413 stcb = sctp_process_control(m, iphlen, &offset, length,
5414 src, dst, sh, ch,
5415 inp, stcb, &net, &fwd_tsn_seen,
5416 mflowtype, mflowid, fibnum,
5417 vrf_id, port);
5418 if (stcb) {
5419 /*
5420 * This covers us if the cookie-echo was there and
5421 * it changes our INP.
5422 */
5423 inp = stcb->sctp_ep;
5424#if defined(INET) || defined(INET6)
5425 if ((ch->chunk_type != SCTP_INITIATION) &&
5426 (net != NULL) && (net->port != port)) {
5427 if (net->port == 0) {
5428 /* UDP encapsulation turned on. */
5429 net->mtu -= sizeof(struct udphdr);
5430 if (stcb->asoc.smallest_mtu > net->mtu) {
5431 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5432 }
5433 } else if (port == 0) {
5434 /* UDP encapsulation turned off. */
5435 net->mtu += sizeof(struct udphdr);
5436 /* XXX Update smallest_mtu */
5437 }
5438 net->port = port;
5439 }
5440#endif
5441 }
5442 } else {
5443 /*
5444 * no control chunks, so pre-process DATA chunks (these
5445 * checks are taken care of by control processing)
5446 */
5447
5448 /*
5449 * if DATA only packet, and auth is required, then punt...
5450 * can't have authenticated without any AUTH (control)
5451 * chunks
5452 */
5453 if ((stcb != NULL) &&
5454 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5455 /* "silently" ignore */
5456 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5457 SCTP_STAT_INCR(sctps_recvauthmissing);
5458 goto out;
5459 }
5460 if (stcb == NULL) {
5461 /* out of the blue DATA chunk */
5462 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5463 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5464 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5465 msg);
5466 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5467 mflowtype, mflowid, fibnum,
5468 vrf_id, port);
5469 goto out;
5470 }
5471 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5472 /* v_tag mismatch! */
5473 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5474 SCTP_STAT_INCR(sctps_badvtag);
5475 goto out;
5476 }
5477 }
5478
5479 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5480 if (stcb == NULL) {
5481 /*
5482 * no valid TCB for this packet, or we found it's a bad
5483 * packet while processing control, or we're done with this
5484 * packet (done or skip rest of data), so we drop it...
5485 */
5486 goto out;
5487 }
5488
5489 /*
5490 * DATA chunk processing
5491 */
5492 /* plow through the data chunks while length > offset */
5493
5494 /*
5495 * Rest should be DATA only. Check authentication state if AUTH for
5496 * DATA is required.
5497 */
5498 if ((length > offset) &&
5499 (stcb != NULL) &&
5500 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5501 !stcb->asoc.authenticated) {
5502 /* "silently" ignore */
5503 SCTP_STAT_INCR(sctps_recvauthmissing);
5504 SCTPDBG(SCTP_DEBUG_AUTH1,
5505 "Data chunk requires AUTH, skipped\n");
5506 goto trigger_send;
5507 }
5508 if (length > offset) {
5509 int retval;
5510
5511 /*
5512 * First check to make sure our state is correct. We would
5513 * not get here unless we really did have a tag, so we don't
5514 * abort if this happens, just dump the chunk silently.
5515 */
5516 switch (SCTP_GET_STATE(stcb)) {
5517 case SCTP_STATE_COOKIE_ECHOED:
5518 /*
5519 * we consider data with valid tags in this state
5520 * shows us the cookie-ack was lost. Imply it was
5521 * there.
5522 */
5523 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5524 break;
5525 case SCTP_STATE_COOKIE_WAIT:
5526 /*
5527 * We consider OOTB any data sent during asoc setup.
5528 */
5529 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5530 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5531 msg);
5532 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5533 mflowtype, mflowid, inp->fibnum,
5534 vrf_id, port);
5535 goto out;
5536 /* sa_ignore NOTREACHED */
5537 break;
5538 case SCTP_STATE_EMPTY: /* should not happen */
5539 case SCTP_STATE_INUSE: /* should not happen */
5540 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5541 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5542 default:
5543 goto out;
5544 /* sa_ignore NOTREACHED */
5545 break;
5546 case SCTP_STATE_OPEN:
5547 case SCTP_STATE_SHUTDOWN_SENT:
5548 break;
5549 }
5550 /* plow through the data chunks while length > offset */
5551 retval = sctp_process_data(mm, iphlen, &offset, length,
5552 inp, stcb, net, &high_tsn);
5553 if (retval == 2) {
5554 /*
5555 * The association aborted, NO UNLOCK needed since
5556 * the association is destroyed.
5557 */
5558 stcb = NULL;
5559 goto out;
5560 }
5561 if (retval == 0) {
5562 data_processed = 1;
5563 }
5564 /*
5565 * Anything important needs to have been m_copy'ed in
5566 * process_data
5567 */
5568 }
5569
5570 /* take care of ecn */
5571 if ((data_processed == 1) &&
5572 (stcb->asoc.ecn_supported == 1) &&
5573 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5574 /* Yep, we need to add a ECNE */
5575 sctp_send_ecn_echo(stcb, net, high_tsn);
5576 }
5577
5578 if ((data_processed == 0) && (fwd_tsn_seen)) {
5579 int was_a_gap;
5580 uint32_t highest_tsn;
5581
5582 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5583 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5584 } else {
5585 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5586 }
5587 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5588 stcb->asoc.send_sack = 1;
5589 sctp_sack_check(stcb, was_a_gap);
5590 } else if (fwd_tsn_seen) {
5591 stcb->asoc.send_sack = 1;
5592 }
5593 /* trigger send of any chunks in queue... */
5594trigger_send:
5595#ifdef SCTP_AUDITING_ENABLED
5596 sctp_audit_log(0xE0, 2);
5597 sctp_auditing(1, inp, stcb, net);
5598#endif
5599 SCTPDBG(SCTP_DEBUG_INPUT1,
5600 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5601 stcb->asoc.peers_rwnd,
5602 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5603 stcb->asoc.total_flight);
5604 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5605 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5606 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5607 }
5608 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5609 cnt_ctrl_ready ||
5610 stcb->asoc.trigger_reset ||
5611 ((un_sent > 0) &&
5612 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5613 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5614 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5615 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5616 }
5617#ifdef SCTP_AUDITING_ENABLED
5618 sctp_audit_log(0xE0, 3);
5619 sctp_auditing(2, inp, stcb, net);
5620#endif
5621out:
5622 if (stcb != NULL) {
5623 SCTP_TCB_UNLOCK(stcb);
5624 }
5625 if (inp_decr != NULL) {
5626 /* reduce ref-count */
5627 SCTP_INP_WLOCK(inp_decr);
5628 SCTP_INP_DECR_REF(inp_decr);
5629 SCTP_INP_WUNLOCK(inp_decr);
5630 }
5631 return;
5632}
5633
5634#ifdef INET
5635void
5636sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5637{
5638 struct mbuf *m;
5639 int iphlen;
5640 uint32_t vrf_id = 0;
5641 uint8_t ecn_bits;
5642 struct sockaddr_in src, dst;
5643 struct ip *ip;
5644 struct sctphdr *sh;
5645 struct sctp_chunkhdr *ch;
5646 int length, offset;
5647 uint8_t compute_crc;
5648 uint32_t mflowid;
5649 uint8_t mflowtype;
5650 uint16_t fibnum;
5651
5652 iphlen = off;
5653 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5654 SCTP_RELEASE_PKT(i_pak);
5655 return;
5656 }
5657 m = SCTP_HEADER_TO_CHAIN(i_pak);
5658#ifdef SCTP_MBUF_LOGGING
5659 /* Log in any input mbufs */
5660 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5661 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5662 }
5663#endif
5664#ifdef SCTP_PACKET_LOGGING
5665 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5666 sctp_packet_log(m);
5667 }
5668#endif
5669 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5670 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5671 m->m_pkthdr.len,
5672 if_name(m->m_pkthdr.rcvif),
5673 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5674 mflowid = m->m_pkthdr.flowid;
5675 mflowtype = M_HASHTYPE_GET(m);
5676 fibnum = M_GETFIB(m);
5677 SCTP_STAT_INCR(sctps_recvpackets);
5678 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5679 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5680 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5681 if (SCTP_BUF_LEN(m) < offset) {
5682 if ((m = m_pullup(m, offset)) == NULL) {
5683 SCTP_STAT_INCR(sctps_hdrops);
5684 return;
5685 }
5686 }
5687 ip = mtod(m, struct ip *);
5688 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5689 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5690 offset -= sizeof(struct sctp_chunkhdr);
5691 memset(&src, 0, sizeof(struct sockaddr_in));
5692 src.sin_family = AF_INET;
5693 src.sin_len = sizeof(struct sockaddr_in);
5694 src.sin_port = sh->src_port;
5695 src.sin_addr = ip->ip_src;
5696 memset(&dst, 0, sizeof(struct sockaddr_in));
5697 dst.sin_family = AF_INET;
5698 dst.sin_len = sizeof(struct sockaddr_in);
5699 dst.sin_port = sh->dest_port;
5700 dst.sin_addr = ip->ip_dst;
5701 length = ntohs(ip->ip_len);
5702 /* Validate mbuf chain length with IP payload length. */
5703 if (SCTP_HEADER_LEN(m) != length) {
5704 SCTPDBG(SCTP_DEBUG_INPUT1,
5705 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5706 SCTP_STAT_INCR(sctps_hdrops);
5707 goto out;
5708 }
5709 /* SCTP does not allow broadcasts or multicasts */
5710 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5711 goto out;
5712 }
5713 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5714 goto out;
5715 }
5716 ecn_bits = ip->ip_tos;
5717 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5718 SCTP_STAT_INCR(sctps_recvhwcrc);
5719 compute_crc = 0;
5720 } else {
5721 SCTP_STAT_INCR(sctps_recvswcrc);
5722 compute_crc = 1;
5723 }
5724 sctp_common_input_processing(&m, iphlen, offset, length,
5725 (struct sockaddr *)&src,
5726 (struct sockaddr *)&dst,
5727 sh, ch,
5728 compute_crc,
5729 ecn_bits,
5730 mflowtype, mflowid, fibnum,
5731 vrf_id, port);
5732out:
5733 if (m) {
5734 sctp_m_freem(m);
5735 }
5736 return;
5737}
5738
5739#if defined(SCTP_MCORE_INPUT) && defined(SMP)
5740extern int *sctp_cpuarry;
5741#endif
5742
5743int
5744sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5745{
5746 struct mbuf *m;
5747 int off;
5748
5749 m = *mp;
5750 off = *offp;
5751#if defined(SCTP_MCORE_INPUT) && defined(SMP)
5752 if (mp_ncpus > 1) {
5753 struct ip *ip;
5754 struct sctphdr *sh;
5755 int offset;
5756 int cpu_to_use;
5757 uint32_t flowid, tag;
5758
5759 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5760 flowid = m->m_pkthdr.flowid;
5761 } else {
5762 /*
5763 * No flow id built by lower layers fix it so we
5764 * create one.
5765 */
5766 offset = off + sizeof(struct sctphdr);
5767 if (SCTP_BUF_LEN(m) < offset) {
5768 if ((m = m_pullup(m, offset)) == NULL) {
5769 SCTP_STAT_INCR(sctps_hdrops);
5770 return (IPPROTO_DONE);
5771 }
5772 }
5773 ip = mtod(m, struct ip *);
5774 sh = (struct sctphdr *)((caddr_t)ip + off);
5775 tag = htonl(sh->v_tag);
5776 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5777 m->m_pkthdr.flowid = flowid;
5778 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5779 }
5780 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5781 sctp_queue_to_mcore(m, off, cpu_to_use);
5782 return (IPPROTO_DONE);
5783 }
5784#endif
5785 sctp_input_with_port(m, off, 0);
5786 return (IPPROTO_DONE);
5787}
5788#endif
SCTP_UNUSED
#define SCTP_UNUSED
Definition: alias_sctp.h:86
badport_bandlim
int badport_bandlim(int)
Definition: ip_icmp.c:1115
BANDLIM_SCTP_OOTB
#define BANDLIM_SCTP_OOTB
Definition: icmp_var.h:99
uint32_t
__uint32_t uint32_t
Definition: in.h:62
uint16_t
__uint16_t uint16_t
Definition: in.h:57
uint8_t
__uint8_t uint8_t
Definition: in.h:52
cookie
const struct encaptab * cookie
Definition: in_gif.c:396
next
ipfw_dyn_rule * next
Definition: ip_fw.h:0
SCTP_COOKIE_ECHO
#define SCTP_COOKIE_ECHO
Definition: sctp.h:441
SCTP_CWR_IN_SAME_WINDOW
#define SCTP_CWR_IN_SAME_WINDOW
Definition: sctp.h:479
SCTP_PCB_FLAGS_DONT_WAKE
#define SCTP_PCB_FLAGS_DONT_WAKE
Definition: sctp.h:516
SCTP_ASCONF_ACK
#define SCTP_ASCONF_ACK
Definition: sctp.h:454
SCTP_INITIATION_ACK
#define SCTP_INITIATION_ACK
Definition: sctp.h:433
SCTP_ECN_CWR
#define SCTP_ECN_CWR
Definition: sctp.h:444
SCTP_FLIGHT_LOGGING_ENABLE
#define SCTP_FLIGHT_LOGGING_ENABLE
Definition: sctp.h:608
SCTP_HEARTBEAT_ACK
#define SCTP_HEARTBEAT_ACK
Definition: sctp.h:436
SCTP_ASCONF
#define SCTP_ASCONF
Definition: sctp.h:466
SCTP_CAUSE_DELETING_LAST_ADDR
#define SCTP_CAUSE_DELETING_LAST_ADDR
Definition: sctp.h:358
SCTP_CAUSE_UNRECOG_CHUNK
#define SCTP_CAUSE_UNRECOG_CHUNK
Definition: sctp.h:348
SCTP_PCB_FLAGS_TCPTYPE
#define SCTP_PCB_FLAGS_TCPTYPE
Definition: sctp.h:504
SCTP_BADCRC
#define SCTP_BADCRC
Definition: sctp.h:474
SCTP_PCB_FLAGS_SOCKET_ALLGONE
#define SCTP_PCB_FLAGS_SOCKET_ALLGONE
Definition: sctp.h:522
SCTP_FORWARD_CUM_TSN
#define SCTP_FORWARD_CUM_TSN
Definition: sctp.h:464
SCTP_CAUSE_NAT_COLLIDING_STATE
#define SCTP_CAUSE_NAT_COLLIDING_STATE
Definition: sctp.h:365
SCTP_CWND_MONITOR_ENABLE
#define SCTP_CWND_MONITOR_ENABLE
Definition: sctp.h:606
SCTP_PCB_FLAGS_UDPTYPE
#define SCTP_PCB_FLAGS_UDPTYPE
Definition: sctp.h:503
SCTP_MAX_COOKIE_LIFE
#define SCTP_MAX_COOKIE_LIFE
Definition: sctp.h:597
SCTP_OPERATION_ERROR
#define SCTP_OPERATION_ERROR
Definition: sctp.h:440
SCTP_ENABLE_RESET_STREAM_REQ
#define SCTP_ENABLE_RESET_STREAM_REQ
Definition: sctp.h:174
SCTP_COOKIE_ACK
#define SCTP_COOKIE_ACK
Definition: sctp.h:442
SCTP_PCB_FLAGS_UNBOUND
#define SCTP_PCB_FLAGS_UNBOUND
Definition: sctp.h:507
SCTP_CAUSE_COOKIE_IN_SHUTDOWN
#define SCTP_CAUSE_COOKIE_IN_SHUTDOWN
Definition: sctp.h:352
SCTP_CAUSE_INVALID_STREAM
#define SCTP_CAUSE_INVALID_STREAM
Definition: sctp.h:343
SCTP_CAUSE_MISSING_PARAM
#define SCTP_CAUSE_MISSING_PARAM
Definition: sctp.h:344
SCTP_PACKET_DROPPED
#define SCTP_PACKET_DROPPED
Definition: sctp.h:456
SCTP_SELECTIVE_ACK
#define SCTP_SELECTIVE_ACK
Definition: sctp.h:434
SCTP_THRESHOLD_LOGGING
#define SCTP_THRESHOLD_LOGGING
Definition: sctp.h:628
SCTP_MAP_LOGGING_ENABLE
#define SCTP_MAP_LOGGING_ENABLE
Definition: sctp.h:611
SCTP_MOBILITY_BASE
#define SCTP_MOBILITY_BASE
Definition: sctp.h:571
SCTP_CAUSE_RESOURCE_SHORTAGE
#define SCTP_CAUSE_RESOURCE_SHORTAGE
Definition: sctp.h:359
SCTP_PCB_FLAGS_IN_TCPPOOL
#define SCTP_PCB_FLAGS_IN_TCPPOOL
Definition: sctp.h:515
SCTP_CAUSE_UNRESOLVABLE_ADDR
#define SCTP_CAUSE_UNRESOLVABLE_ADDR
Definition: sctp.h:347
SCTP_PCB_FLAGS_SOCKET_GONE
#define SCTP_PCB_FLAGS_SOCKET_GONE
Definition: sctp.h:521
SCTP_PCB_FLAGS_DO_ASCONF
#define SCTP_PCB_FLAGS_DO_ASCONF
Definition: sctp.h:538
SCTP_CAUSE_PROTOCOL_VIOLATION
#define SCTP_CAUSE_PROTOCOL_VIOLATION
Definition: sctp.h:355
SCTP_CAUSE_DELETING_SRC_ADDR
#define SCTP_CAUSE_DELETING_SRC_ADDR
Definition: sctp.h:360
SCTP_HAD_NO_TCB
#define SCTP_HAD_NO_TCB
Definition: sctp.h:470
SCTP_STREAM_RESET
#define SCTP_STREAM_RESET
Definition: sctp.h:458
SCTP_PAD_CHUNK
#define SCTP_PAD_CHUNK
Definition: sctp.h:461
SCTP_DATA
#define SCTP_DATA
Definition: sctp.h:431
SCTP_FROM_MIDDLE_BOX
#define SCTP_FROM_MIDDLE_BOX
Definition: sctp.h:473
SCTP_CAUSE_NAT_MISSING_STATE
#define SCTP_CAUSE_NAT_MISSING_STATE
Definition: sctp.h:366
SCTP_PCB_FLAGS_CONNECTED
#define SCTP_PCB_FLAGS_CONNECTED
Definition: sctp.h:514
SCTP_AUTHENTICATION
#define SCTP_AUTHENTICATION
Definition: sctp.h:447
SCTP_IDATA
#define SCTP_IDATA
Definition: sctp.h:451
SCTP_SHUTDOWN_ACK
#define SCTP_SHUTDOWN_ACK
Definition: sctp.h:439
SCTP_SHUTDOWN
#define SCTP_SHUTDOWN
Definition: sctp.h:438
SCTP_CAUSE_UNRECOG_PARAM
#define SCTP_CAUSE_UNRECOG_PARAM
Definition: sctp.h:350
SCTP_ENABLE_CHANGE_ASSOC_REQ
#define SCTP_ENABLE_CHANGE_ASSOC_REQ
Definition: sctp.h:176
SCTP_CAUSE_OUT_OF_RESC
#define SCTP_CAUSE_OUT_OF_RESC
Definition: sctp.h:346
SCTP_SHUTDOWN_COMPLETE
#define SCTP_SHUTDOWN_COMPLETE
Definition: sctp.h:445
SCTP_PCB_COPY_FLAGS
#define SCTP_PCB_COPY_FLAGS
Definition: sctp.h:526
SCTP_MBUF_LOGGING_ENABLE
#define SCTP_MBUF_LOGGING_ENABLE
Definition: sctp.h:613
SCTP_CWND_LOGGING_ENABLE
#define SCTP_CWND_LOGGING_ENABLE
Definition: sctp.h:607
SCTP_CWR_REDUCE_OVERRIDE
#define SCTP_CWR_REDUCE_OVERRIDE
Definition: sctp.h:478
SCTP_ECN_ECHO
#define SCTP_ECN_ECHO
Definition: sctp.h:443
SCTP_CAUSE_STALE_COOKIE
#define SCTP_CAUSE_STALE_COOKIE
Definition: sctp.h:345
SCTP_ABORT_ASSOCIATION
#define SCTP_ABORT_ASSOCIATION
Definition: sctp.h:437
SCTP_MOBILITY_FASTHANDOFF
#define SCTP_MOBILITY_FASTHANDOFF
Definition: sctp.h:572
SCTP_CAUSE_NO_USER_DATA
#define SCTP_CAUSE_NO_USER_DATA
Definition: sctp.h:351
SCTP_HEARTBEAT_REQUEST
#define SCTP_HEARTBEAT_REQUEST
Definition: sctp.h:435
SCTP_NR_SELECTIVE_ACK
#define SCTP_NR_SELECTIVE_ACK
Definition: sctp.h:449
SCTP_PACKET_TRUNCATED
#define SCTP_PACKET_TRUNCATED
Definition: sctp.h:475
SCTP_LAST_PACKET_TRACING
#define SCTP_LAST_PACKET_TRACING
Definition: sctp.h:627
SCTP_CAUSE_INVALID_PARAM
#define SCTP_CAUSE_INVALID_PARAM
Definition: sctp.h:349
SCTP_IFORWARD_CUM_TSN
#define SCTP_IFORWARD_CUM_TSN
Definition: sctp.h:467
SCTP_MOBILITY_PRIM_DELETED
#define SCTP_MOBILITY_PRIM_DELETED
Definition: sctp.h:573
SCTP_INITIATION
#define SCTP_INITIATION
Definition: sctp.h:432
SCTP_PCB_FLAGS_AUTOCLOSE
#define SCTP_PCB_FLAGS_AUTOCLOSE
Definition: sctp.h:542
sctp_handle_asconf
void sctp_handle_asconf(struct mbuf *m, unsigned int offset, struct sockaddr *src, struct sctp_asconf_chunk *cp, struct sctp_tcb *stcb, int first)
Definition: sctp_asconf.c:606
sctp_assoc_immediate_retrans
void sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, struct sctp_nets *dstnet)
Definition: sctp_asconf.c:993
sctp_asconf_send_nat_state_update
void sctp_asconf_send_nat_state_update(struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_asconf.c:3257
sctp_check_address_list
void sctp_check_address_list(struct sctp_tcb *stcb, struct mbuf *m, int offset, int length, struct sockaddr *init_addr, uint16_t local_scope, uint16_t site_scope, uint16_t ipv4_scope, uint16_t loopback_scope)
Definition: sctp_asconf.c:3132
sctp_asconf_cleanup
void sctp_asconf_cleanup(struct sctp_tcb *stcb)
Definition: sctp_asconf.c:939
sctp_handle_asconf_ack
void sctp_handle_asconf_ack(struct mbuf *m, int offset, struct sctp_asconf_ack_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock)
Definition: sctp_asconf.c:1662
sctp_asconf.h
sctp_copy_chunklist
sctp_auth_chklist_t * sctp_copy_chunklist(sctp_auth_chklist_t *list)
Definition: sctp_auth.c:84
sctp_free_chunklist
void sctp_free_chunklist(sctp_auth_chklist_t *list)
Definition: sctp_auth.c:77
sctp_free_hmaclist
void sctp_free_hmaclist(sctp_hmaclist_t *list)
Definition: sctp_auth.c:648
sctp_copy_hmaclist
sctp_hmaclist_t * sctp_copy_hmaclist(sctp_hmaclist_t *list)
Definition: sctp_auth.c:684
sctp_validate_init_auth_params
int sctp_validate_init_auth_params(struct mbuf *m, int offset, int limit)
Definition: sctp_auth.c:1772
sctp_negotiate_hmacid
uint16_t sctp_negotiate_hmacid(sctp_hmaclist_t *peer, sctp_hmaclist_t *local)
Definition: sctp_auth.c:722
sctp_auth_get_cookie_params
void sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m, uint32_t offset, uint32_t length)
Definition: sctp_auth.c:1362
sctp_auth_key_release
void sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t key_id, int so_locked)
Definition: sctp_auth.c:564
sctp_handle_auth
int sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *auth, struct mbuf *m, uint32_t offset)
Definition: sctp_auth.c:1590
sctp_hmac_m
uint32_t sctp_hmac_m(uint16_t hmac_algo, uint8_t *key, uint32_t keylen, struct mbuf *m, uint32_t m_offset, uint8_t *digest, uint32_t trailer)
Definition: sctp_auth.c:975
sctp_auth.h
SCTP_AUTH_DIGEST_LEN_MAX
#define SCTP_AUTH_DIGEST_LEN_MAX
Definition: sctp_auth.h:46
sctp_auth_is_required_chunk
#define sctp_auth_is_required_chunk(chunk, list)
Definition: sctp_auth.h:101
sctp_get_mbuf_for_msg
struct mbuf * sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header, int how, int allonebuf, int type)
Definition: sctp_bsd_addr.c:361
sctp_bsd_addr.h
SCTP_DEBUG_INPUT2
#define SCTP_DEBUG_INPUT2
Definition: sctp_constants.h:636
SCTP_IN_COOKIE_PROC
#define SCTP_IN_COOKIE_PROC
Definition: sctp_constants.h:794
SCTP_STR_RESET_OUT_REQUEST
#define SCTP_STR_RESET_OUT_REQUEST
Definition: sctp_constants.h:397
SCTP_DIAG_INFO_LEN
#define SCTP_DIAG_INFO_LEN
Definition: sctp_constants.h:726
SCTP_SUPPORTED_CHUNK_EXT
#define SCTP_SUPPORTED_CHUNK_EXT
Definition: sctp_constants.h:419
SCTP_STATE_INUSE
#define SCTP_STATE_INUSE
Definition: sctp_constants.h:450
SCTP_SECRET_SIZE
#define SCTP_SECRET_SIZE
Definition: sctp_constants.h:683
SCTP_TIMER_TYPE_SHUTDOWNACK
#define SCTP_TIMER_TYPE_SHUTDOWNACK
Definition: sctp_constants.h:534
SCTP_STATE_COOKIE_ECHOED
#define SCTP_STATE_COOKIE_ECHOED
Definition: sctp_constants.h:452
SCTP_LOC_10
#define SCTP_LOC_10
Definition: sctp_constants.h:757
SCTP_LOC_1
#define SCTP_LOC_1
Definition: sctp_constants.h:748
SCTP_ADD_IP_ADDRESS
#define SCTP_ADD_IP_ADDRESS
Definition: sctp_constants.h:424
SCTP_SIZE32
#define SCTP_SIZE32(x)
Definition: sctp_constants.h:380
SCTP_LOC_28
#define SCTP_LOC_28
Definition: sctp_constants.h:775
SCTP_MIN_RWND
#define SCTP_MIN_RWND
Definition: sctp_constants.h:672
SCTP_NOTIFY_SENDER_DRY
#define SCTP_NOTIFY_SENDER_DRY
Definition: sctp_constants.h:713
SCTP_HAS_NAT_SUPPORT
#define SCTP_HAS_NAT_SUPPORT
Definition: sctp_constants.h:431
SCTP_STATE_WAS_ABORTED
#define SCTP_STATE_WAS_ABORTED
Definition: sctp_constants.h:461
SCTP_PRSCTP_SUPPORTED
#define SCTP_PRSCTP_SUPPORTED
Definition: sctp_constants.h:422
SCTP_NORMAL_PROC
#define SCTP_NORMAL_PROC
Definition: sctp_constants.h:787
SCTP_ADDR_REQ_PRIMARY
#define SCTP_ADDR_REQ_PRIMARY
Definition: sctp_constants.h:482
SCTP_ADD_SUBSTATE
#define SCTP_ADD_SUBSTATE(_stcb, _substate)
Definition: sctp_constants.h:471
SCTP_LOC_19
#define SCTP_LOC_19
Definition: sctp_constants.h:766
SCTP_TSN_GT
#define SCTP_TSN_GT(a, b)
Definition: sctp_constants.h:861
SCTP_LOC_12
#define SCTP_LOC_12
Definition: sctp_constants.h:759
SCTP_LOC_8
#define SCTP_LOC_8
Definition: sctp_constants.h:755
SCTP_NOTIFY_STR_RESET_DENIED_IN
#define SCTP_NOTIFY_STR_RESET_DENIED_IN
Definition: sctp_constants.h:709
SCTP_RTT_FROM_NON_DATA
#define SCTP_RTT_FROM_NON_DATA
Definition: sctp_constants.h:339
SCTP_DEBUG_INPUT1
#define SCTP_DEBUG_INPUT1
Definition: sctp_constants.h:635
SCTP_DATAGRAM_RESEND
#define SCTP_DATAGRAM_RESEND
Definition: sctp_constants.h:351
SCTP_NOTIFY_STR_RESET_FAILED_OUT
#define SCTP_NOTIFY_STR_RESET_FAILED_OUT
Definition: sctp_constants.h:706
SCTP_SUCCESS_REPORT
#define SCTP_SUCCESS_REPORT
Definition: sctp_constants.h:428
SCTP_NOTIFY_PEER_SHUTDOWN
#define SCTP_NOTIFY_PEER_SHUTDOWN
Definition: sctp_constants.h:698
SCTP_SO_NOT_LOCKED
#define SCTP_SO_NOT_LOCKED
Definition: sctp_constants.h:932
SCTP_TIMER_TYPE_HEARTBEAT
#define SCTP_TIMER_TYPE_HEARTBEAT
Definition: sctp_constants.h:530
SCTP_OUTPUT_FROM_COOKIE_ACK
#define SCTP_OUTPUT_FROM_COOKIE_ACK
Definition: sctp_constants.h:372
SCTP_DEL_IP_ADDRESS
#define SCTP_DEL_IP_ADDRESS
Definition: sctp_constants.h:425
SCTP_DEBUG_INPUT3
#define SCTP_DEBUG_INPUT3
Definition: sctp_constants.h:637
SCTP_MAP_SLIDE_RESULT
#define SCTP_MAP_SLIDE_RESULT
Definition: sctp_constants.h:127
SCTP_LOC_14
#define SCTP_LOC_14
Definition: sctp_constants.h:761
SCTP_STATE_COOKIE
#define SCTP_STATE_COOKIE
Definition: sctp_constants.h:390
SCTP_NOTIFY_REMOTE_ERROR
#define SCTP_NOTIFY_REMOTE_ERROR
Definition: sctp_constants.h:714
SCTP_RETRY_DROPPED_THRESH
#define SCTP_RETRY_DROPPED_THRESH
Definition: sctp_constants.h:556
SCTP_STREAM_RESET_TSN_DELTA
#define SCTP_STREAM_RESET_TSN_DELTA
Definition: sctp_constants.h:405
SCTP_NOTIFY_INTERFACE_UP
#define SCTP_NOTIFY_INTERFACE_UP
Definition: sctp_constants.h:691
SCTP_SIGNATURE_SIZE
#define SCTP_SIGNATURE_SIZE
Definition: sctp_constants.h:299
SCTP_LOC_31
#define SCTP_LOC_31
Definition: sctp_constants.h:778
SCTP_LOC_25
#define SCTP_LOC_25
Definition: sctp_constants.h:772
SCTP_ADDR_PF
#define SCTP_ADDR_PF
Definition: sctp_constants.h:484
SCTP_TIMER_TYPE_INIT
#define SCTP_TIMER_TYPE_INIT
Definition: sctp_constants.h:527
SCTP_STR_RESET_IN_REQUEST
#define SCTP_STR_RESET_IN_REQUEST
Definition: sctp_constants.h:398
SCTP_NOTIFY_STR_RESET_DENIED_OUT
#define SCTP_NOTIFY_STR_RESET_DENIED_OUT
Definition: sctp_constants.h:708
sctp_sorwakeup
#define sctp_sorwakeup(inp, so)
Definition: sctp_constants.h:983
SCTP_FROM_SCTP_INPUT
#define SCTP_FROM_SCTP_INPUT
Definition: sctp_constants.h:734
SCTP_NOTIFY_UNSENT_DG_FAIL
#define SCTP_NOTIFY_UNSENT_DG_FAIL
Definition: sctp_constants.h:693
SCTP_LOC_26
#define SCTP_LOC_26
Definition: sctp_constants.h:773
SCTP_STATE_IN_ACCEPT_QUEUE
#define SCTP_STATE_IN_ACCEPT_QUEUE
Definition: sctp_constants.h:462
SCTP_DEBUG_CRCOFFLOAD
#define SCTP_DEBUG_CRCOFFLOAD
Definition: sctp_constants.h:650
SCTP_CE_BITS
#define SCTP_CE_BITS
Definition: sctp_constants.h:437
SCTP_STATE_SHUTDOWN_PENDING
#define SCTP_STATE_SHUTDOWN_PENDING
Definition: sctp_constants.h:457
SCTP_LOC_18
#define SCTP_LOC_18
Definition: sctp_constants.h:765
SCTP_TIMER_TYPE_PRIM_DELETED
#define SCTP_TIMER_TYPE_PRIM_DELETED
Definition: sctp_constants.h:542
SCTP_LOC_13
#define SCTP_LOC_13
Definition: sctp_constants.h:760
SCTP_ADDR_UNCONFIRMED
#define SCTP_ADDR_UNCONFIRMED
Definition: sctp_constants.h:481
SCTP_TIMER_TYPE_STRRESET
#define SCTP_TIMER_TYPE_STRRESET
Definition: sctp_constants.h:538
SCTP_OUTPUT_FROM_CONTROL_PROC
#define SCTP_OUTPUT_FROM_CONTROL_PROC
Definition: sctp_constants.h:361
SCTP_CHUNK_BUFFER_SIZE
#define SCTP_CHUNK_BUFFER_SIZE
Definition: sctp_constants.h:674
SCTP_LOC_15
#define SCTP_LOC_15
Definition: sctp_constants.h:762
SCTP_TIMER_TYPE_RECV
#define SCTP_TIMER_TYPE_RECV
Definition: sctp_constants.h:528
SCTP_DONOT_SETSCOPE
#define SCTP_DONOT_SETSCOPE
Definition: sctp_constants.h:801
SCTP_LOC_6
#define SCTP_LOC_6
Definition: sctp_constants.h:753
SCTP_TSN_GE
#define SCTP_TSN_GE(a, b)
Definition: sctp_constants.h:862
SCTP_LOC_5
#define SCTP_LOC_5
Definition: sctp_constants.h:752
SCTP_FLIGHT_LOG_DOWN_PDRP
#define SCTP_FLIGHT_LOG_DOWN_PDRP
Definition: sctp_constants.h:218
SCTP_NOTIFY_STR_RESET_RECV
#define SCTP_NOTIFY_STR_RESET_RECV
Definition: sctp_constants.h:704
SCTP_LOC_20
#define SCTP_LOC_20
Definition: sctp_constants.h:767
SCTP_LOC_4
#define SCTP_LOC_4
Definition: sctp_constants.h:751
SCTP_STATE_SHUTDOWN_ACK_SENT
#define SCTP_STATE_SHUTDOWN_ACK_SENT
Definition: sctp_constants.h:456
SCTP_NOTIFY_INTERFACE_CONFIRMED
#define SCTP_NOTIFY_INTERFACE_CONFIRMED
Definition: sctp_constants.h:703
SCTP_TIMER_TYPE_SHUTDOWNGUARD
#define SCTP_TIMER_TYPE_SHUTDOWNGUARD
Definition: sctp_constants.h:536
SCTP_LOC_23
#define SCTP_LOC_23
Definition: sctp_constants.h:770
SCTP_GET_STATE
#define SCTP_GET_STATE(_stcb)
Definition: sctp_constants.h:465
SCTP_LOC_11
#define SCTP_LOC_11
Definition: sctp_constants.h:758
SCTP_LOC_27
#define SCTP_LOC_27
Definition: sctp_constants.h:774
SCTP_NOTIFY_ASSOC_UP
#define SCTP_NOTIFY_ASSOC_UP
Definition: sctp_constants.h:688
SCTP_THRESHOLD_CLEAR
#define SCTP_THRESHOLD_CLEAR
Definition: sctp_constants.h:223
SCTP_GETTIME_TIMEVAL
#define SCTP_GETTIME_TIMEVAL(x)
Definition: sctp_constants.h:959
SCTP_LOC_2
#define SCTP_LOC_2
Definition: sctp_constants.h:749
SCTP_LOC_3
#define SCTP_LOC_3
Definition: sctp_constants.h:750
SCTP_STR_RESET_ADD_IN_STREAMS
#define SCTP_STR_RESET_ADD_IN_STREAMS
Definition: sctp_constants.h:402
SCTP_DATAGRAM_UNSENT
#define SCTP_DATAGRAM_UNSENT
Definition: sctp_constants.h:347
SCTP_STATE_CLOSED_SOCKET
#define SCTP_STATE_CLOSED_SOCKET
Definition: sctp_constants.h:458
SCTP_TIMER_TYPE_PATHMTURAISE
#define SCTP_TIMER_TYPE_PATHMTURAISE
Definition: sctp_constants.h:533
SCTP_MBUF_ICOPY
#define SCTP_MBUF_ICOPY
Definition: sctp_constants.h:196
SCTP_NOTIFY_ASSOC_DOWN
#define SCTP_NOTIFY_ASSOC_DOWN
Definition: sctp_constants.h:689
SCTP_NOTIFY_SPECIAL_SP_FAIL
#define SCTP_NOTIFY_SPECIAL_SP_FAIL
Definition: sctp_constants.h:694
SCTP_LOC_21
#define SCTP_LOC_21
Definition: sctp_constants.h:768
SCTP_IPV4_ADDRESS
#define SCTP_IPV4_ADDRESS
Definition: sctp_constants.h:388
SCTP_CWND_INITIALIZATION
#define SCTP_CWND_INITIALIZATION
Definition: sctp_constants.h:165
SCTP_STATE_COOKIE_WAIT
#define SCTP_STATE_COOKIE_WAIT
Definition: sctp_constants.h:451
SCTP_NOTIFY_STR_RESET_FAILED_IN
#define SCTP_NOTIFY_STR_RESET_FAILED_IN
Definition: sctp_constants.h:707
SCTP_LOC_7
#define SCTP_LOC_7
Definition: sctp_constants.h:754
SCTP_TIMER_TYPE_SHUTDOWN
#define SCTP_TIMER_TYPE_SHUTDOWN
Definition: sctp_constants.h:529
SCTP_STATE_EMPTY
#define SCTP_STATE_EMPTY
Definition: sctp_constants.h:449
SCTP_LOC_30
#define SCTP_LOC_30
Definition: sctp_constants.h:777
SCTP_STATE_SHUTDOWN_SENT
#define SCTP_STATE_SHUTDOWN_SENT
Definition: sctp_constants.h:454
SCTP_STR_RESET_TSN_REQUEST
#define SCTP_STR_RESET_TSN_REQUEST
Definition: sctp_constants.h:399
SCTP_NOTIFY_STR_RESET_SEND
#define SCTP_NOTIFY_STR_RESET_SEND
Definition: sctp_constants.h:705
SCTP_STATE_SHUTDOWN_RECEIVED
#define SCTP_STATE_SHUTDOWN_RECEIVED
Definition: sctp_constants.h:455
SCTP_LOC_22
#define SCTP_LOC_22
Definition: sctp_constants.h:769
SCTP_OUTPUT_FROM_INPUT_ERROR
#define SCTP_OUTPUT_FROM_INPUT_ERROR
Definition: sctp_constants.h:360
SCTP_SET_PRIM_ADDR
#define SCTP_SET_PRIM_ADDR
Definition: sctp_constants.h:427
SCTP_STR_RESET_ADD_OUT_STREAMS
#define SCTP_STR_RESET_ADD_OUT_STREAMS
Definition: sctp_constants.h:401
SCTP_LOC_9
#define SCTP_LOC_9
Definition: sctp_constants.h:756
SCTP_STATE_ABOUT_TO_BE_FREED
#define SCTP_STATE_ABOUT_TO_BE_FREED
Definition: sctp_constants.h:459
SCTP_LOC_24
#define SCTP_LOC_24
Definition: sctp_constants.h:771
IS_SCTP_CONTROL
#define IS_SCTP_CONTROL(a)
Definition: sctp_constants.h:382
SCTP_IPV6_ADDRESS
#define SCTP_IPV6_ADDRESS
Definition: sctp_constants.h:389
SCTP_ADDR_REACHABLE
#define SCTP_ADDR_REACHABLE
Definition: sctp_constants.h:475
SCTP_STATE_OPEN
#define SCTP_STATE_OPEN
Definition: sctp_constants.h:453
SCTP_SET_STATE
#define SCTP_SET_STATE(_stcb, _state)
Definition: sctp_constants.h:467
SCTP_TIMER_TYPE_AUTOCLOSE
#define SCTP_TIMER_TYPE_AUTOCLOSE
Definition: sctp_constants.h:537
SCTP_SO_LOCKED
#define SCTP_SO_LOCKED
Definition: sctp_constants.h:931
SCTP_TIMER_TYPE_ASCONF
#define SCTP_TIMER_TYPE_ASCONF
Definition: sctp_constants.h:535
SCTP_STR_RESET_RESPONSE
#define SCTP_STR_RESET_RESPONSE
Definition: sctp_constants.h:400
SCTP_ERROR_CAUSE_IND
#define SCTP_ERROR_CAUSE_IND
Definition: sctp_constants.h:426
SCTP_LOC_29
#define SCTP_LOC_29
Definition: sctp_constants.h:776
SCTP_DATAGRAM_ACKED
#define SCTP_DATAGRAM_ACKED
Definition: sctp_constants.h:352
SCTP_TIMER_TYPE_SEND
#define SCTP_TIMER_TYPE_SEND
Definition: sctp_constants.h:526
SCTP_DEBUG_AUTH1
#define SCTP_DEBUG_AUTH1
Definition: sctp_constants.h:633
SCTP_DEBUG_INDATA1
#define SCTP_DEBUG_INDATA1
Definition: sctp_constants.h:647
SCTP_LARGEST_INIT_ACCEPTED
#define SCTP_LARGEST_INIT_ACCEPTED
Definition: sctp_constants.h:68
SCTP_MBUF_SPLIT
#define SCTP_MBUF_SPLIT
Definition: sctp_constants.h:197
SCTP_ADDR_NOT_LOCKED
#define SCTP_ADDR_NOT_LOCKED
Definition: sctp_constants.h:938
SCTP_MAX_RESET_PARAMS
#define SCTP_MAX_RESET_PARAMS
Definition: sctp_constants.h:404
SCTP_MBUF_INPUT
#define SCTP_MBUF_INPUT
Definition: sctp_constants.h:193
SCTP_TIMER_TYPE_COOKIE
#define SCTP_TIMER_TYPE_COOKIE
Definition: sctp_constants.h:531
SCTP_HMAC
#define SCTP_HMAC
Definition: sctp_constants.h:298
SCTP_NOTIFY_ASSOC_RESTART
#define SCTP_NOTIFY_ASSOC_RESTART
Definition: sctp_constants.h:697
sctp_calculate_cksum
uint32_t sctp_calculate_cksum(struct mbuf *m, int32_t offset)
Definition: sctp_crc32.c:93
sctp_crc32.h
sctp_header.h
SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS
#define SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS
Definition: sctp_header.h:467
SCTP_MIN_OVERHEAD
#define SCTP_MIN_OVERHEAD
Definition: sctp_header.h:556
SCTP_NUM_DB_TO_VERIFY
#define SCTP_NUM_DB_TO_VERIFY
Definition: sctp_header.h:399
SCTP_STREAM_RESET_RESULT_DENIED
#define SCTP_STREAM_RESET_RESULT_DENIED
Definition: sctp_header.h:465
SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO
#define SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO
Definition: sctp_header.h:468
SCTP_STREAM_RESET_RESULT_IN_PROGRESS
#define SCTP_STREAM_RESET_RESULT_IN_PROGRESS
Definition: sctp_header.h:469
sctp_init_ack_chunk
#define sctp_init_ack_chunk
Definition: sctp_header.h:235
SCTP_STREAM_RESET_RESULT_PERFORMED
#define SCTP_STREAM_RESET_RESULT_PERFORMED
Definition: sctp_header.h:464
sctp_init_ack
#define sctp_init_ack
Definition: sctp_header.h:234
sctp_update_acked
void sctp_update_acked(struct sctp_tcb *stcb, struct sctp_shutdown_chunk *cp, int *abort_flag)
Definition: sctp_indata.c:5222
sctp_handle_forward_tsn
void sctp_handle_forward_tsn(struct sctp_tcb *stcb, struct sctp_forward_tsn_chunk *fwd, int *abort_flag, struct mbuf *m, int offset)
Definition: sctp_indata.c:5476
sctp_process_data
int sctp_process_data(struct mbuf **mm, int iphlen, int *offset, int length, struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t *high_tsn)
Definition: sctp_indata.c:2649
sctp_sack_check
void sctp_sack_check(struct sctp_tcb *stcb, int was_a_gap)
Definition: sctp_indata.c:2560
sctp_handle_sack
void sctp_handle_sack(struct mbuf *m, int offset_seg, int offset_dup, struct sctp_tcb *stcb, uint16_t num_seg, uint16_t num_nr_seg, uint16_t num_dup, int *abort_now, uint8_t flags, uint32_t cum_ack, uint32_t rwnd, int ecne_seen)
Definition: sctp_indata.c:4401
sctp_express_handle_sack
void sctp_express_handle_sack(struct sctp_tcb *stcb, uint32_t cumack, uint32_t rwnd, int *abort_now, int ecne_seen)
Definition: sctp_indata.c:3924
sctp_indata.h
sctp_process_init
static int sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
Definition: sctp_input.c:242
sctp_is_there_unsent_data
int sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked)
Definition: sctp_input.c:175
sctp_process_control
static struct sctp_tcb * sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen, uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, uint32_t vrf_id, uint16_t port)
Definition: sctp_input.c:4314
sctp_handle_str_reset_request_tsn
static int sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk, struct sctp_stream_reset_tsn_request *req)
Definition: sctp_input.c:3663
sctp_reset_clear_pending
static void sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
Definition: sctp_input.c:3343
sctp_process_init_ack
static int sctp_process_init_ack(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id)
Definition: sctp_input.c:392
sctp_common_input_processing
void sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_chunkhdr *ch, uint8_t compute_crc, uint8_t ecn_bits, uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, uint32_t vrf_id, uint16_t port)
Definition: sctp_input.c:5252
sctp_handle_packet_dropped
static void sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
Definition: sctp_input.c:4134
sctp_handle_nat_colliding_state
static int sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
Definition: sctp_input.c:671
sctp_handle_str_reset_add_out_strm
static void sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk, struct sctp_stream_reset_add_strm *str_add)
Definition: sctp_input.c:3897
sctp_handle_stream_reset_response
static int sctp_handle_stream_reset_response(struct sctp_tcb *stcb, uint32_t seq, uint32_t action, struct sctp_stream_reset_response *respin)
Definition: sctp_input.c:3430
sctp_handle_str_reset_request_in
static void sctp_handle_str_reset_request_in(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk, struct sctp_stream_reset_in_request *req, int trunc)
Definition: sctp_input.c:3597
sctp_stop_all_cookie_timers
static void sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
Definition: sctp_input.c:59
sctp_handle_ecn_echo
static void sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp, struct sctp_tcb *stcb)
Definition: sctp_input.c:2852
sctp_process_cookie_existing
static struct sctp_tcb * sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp, struct sockaddr *init_src, int *notification, int auth_skipped, uint32_t auth_offset, uint32_t auth_len, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id, uint16_t port)
Definition: sctp_input.c:1332
sctp_handle_nat_missing_state
static int sctp_handle_nat_missing_state(struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:729
sctp_handle_shutdown
static void sctp_handle_shutdown(struct sctp_shutdown_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
Definition: sctp_input.c:831
sctp_handle_cookie_echo
static struct mbuf * sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp, struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp, int auth_skipped, uint32_t auth_offset, uint32_t auth_len, struct sctp_tcb **locked_tcb, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id, uint16_t port)
Definition: sctp_input.c:2252
sctp_handle_error
static int sctp_handle_error(struct sctp_chunkhdr *ch, struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
Definition: sctp_input.c:1066
sctp_handle_cookie_ack
static void sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:2748
process_chunk_drop
static int process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc, struct sctp_nets *net, uint8_t flg)
Definition: sctp_input.c:3052
sctp_process_unrecog_param
static void sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
Definition: sctp_input.c:1032
sctp_handle_stream_reset
static int sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset, struct sctp_chunkhdr *ch_req)
Definition: sctp_input.c:3957
sctp_reset_out_streams
static void sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
Definition: sctp_input.c:3318
__FBSDID
__FBSDID("$FreeBSD$")
sctp_handle_shutdown_complete
static void sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:3011
sctp_process_cookie_new
static struct sctp_tcb * sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len, struct sctp_inpcb *inp, struct sctp_nets **netp, struct sockaddr *init_src, int *notification, int auth_skipped, uint32_t auth_offset, uint32_t auth_len, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id, uint16_t port)
Definition: sctp_input.c:1963
sctp_process_unrecog_chunk
static void sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
Definition: sctp_input.c:1006
sctp_reset_in_stream
void sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
Definition: sctp_input.c:3290
sctp_clean_up_stream_reset
static void sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
Definition: sctp_input.c:3407
sctp_handle_str_reset_request_out
static void sctp_handle_str_reset_request_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk, struct sctp_stream_reset_out_request *req, int trunc)
Definition: sctp_input.c:3728
sctp_find_stream_reset
struct sctp_stream_reset_request * sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
Definition: sctp_input.c:3365
sctp_handle_abort
static int sctp_handle_abort(struct sctp_abort_chunk *abort, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:746
sctp_handle_init_ack
static int sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id)
Definition: sctp_input.c:1229
sctp_handle_shutdown_ack
static void sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:942
sctp_handle_ecn_cwr
static void sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:2971
sctp_start_net_timers
static void sctp_start_net_timers(struct sctp_tcb *stcb)
Definition: sctp_input.c:803
sctp_handle_heartbeat_ack
static void sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_input.c:528
sctp_handle_str_reset_add_strm
static void sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk, struct sctp_stream_reset_add_strm *str_add)
Definition: sctp_input.c:3805
sctp_handle_init
static void sctp_handle_init(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_init_chunk *cp, struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id, uint16_t port)
Definition: sctp_input.c:86
sctp_input.h
sctp_kdtrace.h
SCTP_PROBE5
#define SCTP_PROBE5(probe, arg0, arg1, arg2, arg3, arg4)
Definition: sctp_kdtrace.h:51
SCTP_TCB_LOCK
#define SCTP_TCB_LOCK(_tcb)
Definition: sctp_lock_bsd.h:386
SCTP_INP_INFO_WLOCK
#define SCTP_INP_INFO_WLOCK()
Definition: sctp_lock_bsd.h:98
SCTP_INP_RLOCK
#define SCTP_INP_RLOCK(_inp)
Definition: sctp_lock_bsd.h:282
SCTP_ASOC_CREATE_UNLOCK
#define SCTP_ASOC_CREATE_UNLOCK(_inp)
Definition: sctp_lock_bsd.h:333
SCTP_INP_READ_UNLOCK
#define SCTP_INP_READ_UNLOCK(_inp)
Definition: sctp_lock_bsd.h:250
SCTP_INP_WUNLOCK
#define SCTP_INP_WUNLOCK(_inp)
Definition: sctp_lock_bsd.h:295
SCTP_TCB_SEND_UNLOCK
#define SCTP_TCB_SEND_UNLOCK(_tcb)
Definition: sctp_lock_bsd.h:353
SCTP_INP_DECR_REF
#define SCTP_INP_DECR_REF(_inp)
Definition: sctp_lock_bsd.h:310
SCTP_INP_WLOCK
#define SCTP_INP_WLOCK(_inp)
Definition: sctp_lock_bsd.h:286
SCTP_DECR_CHK_COUNT
#define SCTP_DECR_CHK_COUNT()
Definition: sctp_lock_bsd.h:489
SCTP_TCB_LOCK_ASSERT
#define SCTP_TCB_LOCK_ASSERT(_tcb)
Definition: sctp_lock_bsd.h:404
SCTP_INP_INCR_REF
#define SCTP_INP_INCR_REF(_inp)
Definition: sctp_lock_bsd.h:309
SCTP_TCB_UNLOCK
#define SCTP_TCB_UNLOCK(_tcb)
Definition: sctp_lock_bsd.h:395
SCTP_ASOC_CREATE_LOCK
#define SCTP_ASOC_CREATE_LOCK(_inp)
Definition: sctp_lock_bsd.h:328
SCTP_INP_INFO_WUNLOCK
#define SCTP_INP_INFO_WUNLOCK()
Definition: sctp_lock_bsd.h:106
SCTP_TCB_SEND_LOCK
#define SCTP_TCB_SEND_LOCK(_tcb)
Definition: sctp_lock_bsd.h:349
SCTP_INP_READ_LOCK
#define SCTP_INP_READ_LOCK(_inp)
Definition: sctp_lock_bsd.h:246
SCTP_INP_RUNLOCK
#define SCTP_INP_RUNLOCK(_inp)
Definition: sctp_lock_bsd.h:291
sctp_os.h
SCTP_IS_IT_BROADCAST
#define SCTP_IS_IT_BROADCAST(dst, m)
Definition: sctp_os_bsd.h:356
SCTP_LTRACE_CHK
#define SCTP_LTRACE_CHK(a, b, c, d)
Definition: sctp_os_bsd.h:177
SCTP_HEADER_TO_CHAIN
#define SCTP_HEADER_TO_CHAIN(m)
Definition: sctp_os_bsd.h:336
SCTP_SNPRINTF
#define SCTP_SNPRINTF(...)
Definition: sctp_os_bsd.h:303
SCTP_BUF_RESV_UF
#define SCTP_BUF_RESV_UF(m, size)
Definition: sctp_os_bsd.h:293
SCTP_GET_PKT_VRFID
#define SCTP_GET_PKT_VRFID(m, vrf_id)
Definition: sctp_os_bsd.h:347
SCTP_MALLOC
#define SCTP_MALLOC(var, type, size, name)
Definition: sctp_os_bsd.h:219
SCTP_BASE_INFO
#define SCTP_BASE_INFO(__m)
Definition: sctp_os_bsd.h:145
SCTP_RELEASE_PKT
#define SCTP_RELEASE_PKT(m)
Definition: sctp_os_bsd.h:341
SCTP_PRINTF
#define SCTP_PRINTF(params...)
Definition: sctp_os_bsd.h:151
SCTP_FREE
#define SCTP_FREE(var, type)
Definition: sctp_os_bsd.h:224
SCTP_BUF_LEN
#define SCTP_BUF_LEN(m)
Definition: sctp_os_bsd.h:290
SCTP_HEADER_LEN
#define SCTP_HEADER_LEN(m)
Definition: sctp_os_bsd.h:338
SCTP_M_COPYM
#define SCTP_M_COPYM
Definition: sctp_os_bsd.h:261
SCTPDBG
#define SCTPDBG(level, params...)
Definition: sctp_os_bsd.h:170
SCTP_ZONE_FREE
#define SCTP_ZONE_FREE(zone, element)
Definition: sctp_os_bsd.h:255
SCTP_IS_LISTENING
#define SCTP_IS_LISTENING(inp)
Definition: sctp_os_bsd.h:480
SCTP_BASE_SYSCTL
#define SCTP_BASE_SYSCTL(__m)
Definition: sctp_os_bsd.h:148
SCTP_BUF_NEXT
#define SCTP_BUF_NEXT(m)
Definition: sctp_os_bsd.h:291
sctp_send_shutdown_complete
void sctp_send_shutdown_complete(struct sctp_tcb *stcb, struct sctp_nets *net, int reflect_vtag)
Definition: sctp_output.c:10971
sctp_send_shutdown_ack
void sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_output.c:9163
sctp_send_cookie_echo
int sctp_send_cookie_echo(struct mbuf *m, int offset, int limit, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_output.c:8973
sctp_send_cookie_ack
void sctp_send_cookie_ack(struct sctp_tcb *stcb)
Definition: sctp_output.c:9116
sctp_send_cwr
void sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
Definition: sctp_output.c:11606
send_forward_tsn
void send_forward_tsn(struct sctp_tcb *stcb, struct sctp_association *asoc)
Definition: sctp_output.c:10264
sctp_add_stream_reset_result_tsn
void sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, uint32_t resp_seq, uint32_t result, uint32_t send_una, uint32_t recv_next)
Definition: sctp_output.c:11901
sctp_toss_old_cookies
void sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
Definition: sctp_output.c:6912
sctp_queue_op_err
void sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
Definition: sctp_output.c:8909
sctp_arethere_unrecognized_parameters
struct mbuf * sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly, int *cookie_found)
Definition: sctp_output.c:4901
sctp_send_packet_dropped
void sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, struct mbuf *m, int len, int iphlen, int bad_crc)
Definition: sctp_output.c:11457
sctp_send_str_reset_req
int sctp_send_str_reset_req(struct sctp_tcb *stcb, uint16_t number_entries, uint16_t *list, uint8_t send_in_req, uint8_t send_tsn_req, uint8_t add_stream, uint16_t adding_o, uint16_t adding_i, uint8_t peer_asked)
Definition: sctp_output.c:12070
sctp_send_hb
void sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked)
Definition: sctp_output.c:11287
sctp_send_initiate_ack
void sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *src_net, struct mbuf *init_pkt, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_init_chunk *init_chk, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id, uint16_t port)
Definition: sctp_output.c:5457
sctp_send_initiate
void sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked)
Definition: sctp_output.c:4615
sctp_send_asconf
void sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
Definition: sctp_output.c:9271
sctp_add_stream_reset_result
void sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, uint32_t resp_seq, uint32_t result)
Definition: sctp_output.c:11810
sctp_move_chunks_from_net
void sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_output.c:7769
sctp_send_sack
void sctp_send_sack(struct sctp_tcb *stcb, int so_locked)
Definition: sctp_output.c:10478
sctp_send_operr_to
void sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, uint32_t vrf_id, uint16_t port)
Definition: sctp_output.c:12297
sctp_send_heartbeat_ack
void sctp_send_heartbeat_ack(struct sctp_tcb *stcb, struct mbuf *m, int offset, int chk_length, struct sctp_nets *net)
Definition: sctp_output.c:9061
sctp_send_asconf_ack
void sctp_send_asconf_ack(struct sctp_tcb *stcb)
Definition: sctp_output.c:9321
sctp_send_shutdown
void sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctp_output.c:9206
sctp_send_shutdown_complete2
void sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, uint32_t vrf_id, uint16_t port)
Definition: sctp_output.c:11276
sctp_send_abort
void sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, uint32_t vrf_id, uint16_t port)
Definition: sctp_output.c:12279
sctp_send_ecn_echo
void sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn)
Definition: sctp_output.c:11392
sctp_send_stream_reset_out_if_possible
int sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
Definition: sctp_output.c:11998
sctp_chunk_output
void sctp_chunk_output(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_where, int so_locked)
Definition: sctp_output.c:9960
sctp_output.h
SCTP_DATA_CHUNK_OVERHEAD
#define SCTP_DATA_CHUNK_OVERHEAD(stcb)
Definition: sctp_output.h:130
sctp_findassociation_ep_asconf
struct sctp_tcb * sctp_findassociation_ep_asconf(struct mbuf *m, int offset, struct sockaddr *dst, struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
Definition: sctp_pcb.c:2273
sctp_findassociation_addr
struct sctp_tcb * sctp_findassociation_addr(struct mbuf *m, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
Definition: sctp_pcb.c:2213
sctp_aloc_assoc
struct sctp_tcb * sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, int *error, uint32_t override_tag, uint32_t initial_tsn, uint32_t vrf_id, uint16_t o_streams, uint16_t port, struct thread *p, int initialize_auth_params)
Definition: sctp_pcb.c:4400
sctp_add_remote_addr
int sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, struct sctp_nets **netp, uint16_t port, int set_scope, int from)
Definition: sctp_pcb.c:3721
sctp_clean_up_stream
void sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
Definition: sctp_pcb.c:4641
sctp_findnet
struct sctp_nets * sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
Definition: sctp_pcb.c:3690
sctp_load_addresses_from_init
int sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, int offset, int limit, struct sockaddr *src, struct sockaddr *dst, struct sockaddr *altsa, uint16_t port)
Definition: sctp_pcb.c:6003
sctp_free_assoc
int sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
Definition: sctp_pcb.c:4689
sctp_findassociation_ep_addr
struct sctp_tcb * sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
Definition: sctp_pcb.c:1259
sctp_set_primary_addr
int sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, struct sctp_nets *net)
Definition: sctp_pcb.c:6683
sctp_move_pcb_and_assoc
void sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, struct sctp_tcb *stcb)
Definition: sctp_pcb.c:2610
sctp_pcb.h
SCTP_DONT_INITIALIZE_AUTH_PARAMS
#define SCTP_DONT_INITIALIZE_AUTH_PARAMS
Definition: sctp_pcb.h:567
SCTP_PCBHASH_ASOC
#define SCTP_PCBHASH_ASOC(tag, mask)
Definition: sctp_pcb.h:60
SCTP_ON_UNORDERED
#define SCTP_ON_UNORDERED
Definition: sctp_structs.h:489
SCTP_STREAM_OPEN
#define SCTP_STREAM_OPEN
Definition: sctp_structs.h:605
SCTP_STREAM_RESET_PENDING
#define SCTP_STREAM_RESET_PENDING
Definition: sctp_structs.h:606
SCTP_STREAM_CLOSED
#define SCTP_STREAM_CLOSED
Definition: sctp_structs.h:603
SCTP_ON_ORDERED
#define SCTP_ON_ORDERED
Definition: sctp_structs.h:488
sctp_sysctl.h
sctp_delete_prim_timer
void sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
Definition: sctp_timer.c:1279
sctp_timer.h
SCTP_ASSOC_RESET_FAILED
#define SCTP_ASSOC_RESET_FAILED
Definition: sctp_uio.h:495
SCTP_STREAM_CHANGE_FAILED
#define SCTP_STREAM_CHANGE_FAILED
Definition: sctp_uio.h:510
SCTP_STAT_INCR_COUNTER32
#define SCTP_STAT_INCR_COUNTER32(_x)
Definition: sctp_uio.h:1135
SCTP_INIT
#define SCTP_INIT
Definition: sctp_uio.h:79
SCTP_STREAM_CHANGE_DENIED
#define SCTP_STREAM_CHANGE_DENIED
Definition: sctp_uio.h:509
SCTP_STAT_INCR_COUNTER64
#define SCTP_STAT_INCR_COUNTER64(_x)
Definition: sctp_uio.h:1136
SCTP_ASSOC_RESET_DENIED
#define SCTP_ASSOC_RESET_DENIED
Definition: sctp_uio.h:494
SCTP_PR_SCTP_MAX
#define SCTP_PR_SCTP_MAX
Definition: sctp_uio.h:264
SCTP_STAT_INCR_GAUGE32
#define SCTP_STAT_INCR_GAUGE32(_x)
Definition: sctp_uio.h:1137
SCTP_STAT_INCR
#define SCTP_STAT_INCR(_x)
Definition: sctp_uio.h:1125
SCTP_STAT_DECR_GAUGE32
#define SCTP_STAT_DECR_GAUGE32(_x)
Definition: sctp_uio.h:1140
sctp_pathmtu_adjustment
void sctp_pathmtu_adjustment(struct sctp_tcb *stcb, uint32_t mtu, bool resend)
Definition: sctp_usrreq.c:109
sctp_var.h
sctp_free_a_chunk
#define sctp_free_a_chunk(_stcb, _chk, _so_locked)
Definition: sctp_var.h:140
sctp_flight_size_decrease
#define sctp_flight_size_decrease(tp1)
Definition: sctp_var.h:247
sctp_total_flight_decrease
#define sctp_total_flight_decrease(stcb, tp1)
Definition: sctp_var.h:296
sctp_free_a_strmoq
#define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked)
Definition: sctp_var.h:122
sctp_is_feature_on
#define sctp_is_feature_on(inp, feature)
Definition: sctp_var.h:49
sctp_free_a_readq
#define sctp_free_a_readq(_stcb, _readq)
Definition: sctp_var.h:109
sctp_is_mobility_feature_on
#define sctp_is_mobility_feature_on(inp, feature)
Definition: sctp_var.h:81
sctp_free_remote_addr
#define sctp_free_remote_addr(__net)
Definition: sctp_var.h:184
sctp_ucount_incr
#define sctp_ucount_incr(val)
Definition: sctp_var.h:224
sctp_alloc_a_chunk
#define sctp_alloc_a_chunk(_stcb, _chk)
Definition: sctp_var.h:166
sctp_misc_ints
void sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
Definition: sctputil.c:489
sctp_timer_stop
void sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t from)
Definition: sctputil.c:2615
sctp_timer_start
void sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets *net)
Definition: sctputil.c:2157
sctp_report_all_outbound
void sctp_report_all_outbound(struct sctp_tcb *stcb, uint16_t error, int so_locked)
Definition: sctputil.c:4226
sctp_stop_association_timers
void sctp_stop_association_timers(struct sctp_tcb *stcb, bool stop_assoc_kill_timer)
Definition: sctputil.c:877
sctp_generate_cause
struct mbuf * sctp_generate_cause(uint16_t code, char *info)
Definition: sctputil.c:4951
sctp_calculate_rto
int sctp_calculate_rto(struct sctp_tcb *stcb, struct sctp_association *asoc, struct sctp_nets *net, struct timeval *old, int rtt_from_sack)
Definition: sctputil.c:2916
sctp_ulp_notify
void sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb, uint32_t error, void *data, int so_locked)
Definition: sctputil.c:4042
sctp_select_a_tag
uint32_t sctp_select_a_tag(struct sctp_inpcb *inp, uint16_t lport, uint16_t rport, int check)
Definition: sctputil.c:1049
sctp_handle_ootb
void sctp_handle_ootb(struct mbuf *m, int iphlen, int offset, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct sctp_inpcb *inp, struct mbuf *cause, uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, uint32_t vrf_id, uint16_t port)
Definition: sctputil.c:4508
sctp_notify_stream_reset_tsn
void sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag)
Definition: sctputil.c:3863
sctp_abort_an_association
void sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct mbuf *op_err, bool timedout, int so_locked)
Definition: sctputil.c:4465
sctp_log_map
void sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from)
Definition: sctputil.c:205
sctp_ticks_to_secs
uint32_t sctp_ticks_to_secs(uint32_t ticks)
Definition: sctputil.c:833
sctp_notify_stream_reset_add
void sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin, uint16_t numberout, int flag)
Definition: sctputil.c:3807
sctp_pull_off_control_to_new_inp
void sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, struct sctp_tcb *stcb, int waitflags)
Definition: sctputil.c:4758
sctp_log_cwnd
void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from)
Definition: sctputil.c:315
sctp_m_getptr
caddr_t sctp_m_getptr(struct mbuf *m, int off, int len, uint8_t *in_ptr)
Definition: sctputil.c:3033
sctp_abort_association
void sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh, struct mbuf *op_err, uint8_t mflowtype, uint32_t mflowid, uint32_t vrf_id, uint16_t port)
Definition: sctputil.c:4361
sctp_ticks_to_msecs
uint32_t sctp_ticks_to_msecs(uint32_t ticks)
Definition: sctputil.c:799
sctp_abort_notification
void sctp_abort_notification(struct sctp_tcb *stcb, bool from_peer, bool timeout, uint16_t error, struct sctp_abort_chunk *abort, int so_locked)
Definition: sctputil.c:4327
sctp_stop_timers_for_shutdown
void sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
Definition: sctputil.c:853
sctp_free_bufspace
#define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)
Definition: sctputil.h:248
sctp_m_freem
#define sctp_m_freem
Definition: sctputil.h:55
chk_id::id
uint8_t id
Definition: sctp_structs.h:418
chk_id::can_take_data
uint8_t can_take_data
Definition: sctp_structs.h:419
in_addr::s_addr
in_addr_t s_addr
Definition: in.h:84
ip
Definition: ip.h:51
ip::ip_dst
struct in_addr ip_src ip_dst
Definition: ip.h:71
ip::ip_tos
u_char ip_tos
Definition: ip.h:60
ip::ip_len
u_short ip_len
Definition: ip.h:61
old_sctp_ecne_chunk
Definition: sctp_header.h:328
sctp_abort_chunk
Definition: sctp_header.h:289
sctp_abort_chunk::ch
struct sctp_chunkhdr ch
Definition: sctp_header.h:290
sctp_asconf_ack_chunk
Definition: sctp_header.h:367
sctp_asconf_ack
Definition: sctp_structs.h:771
sctp_asconf_ack::data
struct mbuf * data
Definition: sctp_structs.h:775
sctp_asconf_addr
Definition: sctp_structs.h:637
sctp_asconf_chunk
Definition: sctp_header.h:359
sctp_asconf_paramhdr
Definition: sctp_header.h:107
sctp_association
Definition: sctp_structs.h:785
sctp_association::peer_hmac_id
uint16_t peer_hmac_id
Definition: sctp_structs.h:1097
sctp_association::asconf_seq_in
uint32_t asconf_seq_in
Definition: sctp_structs.h:896
sctp_association::cookie_preserve_req
uint32_t cookie_preserve_req
Definition: sctp_structs.h:891
sctp_association::sending_seq
uint32_t sending_seq
Definition: sctp_structs.h:930
sctp_association::strm_realoutsize
uint16_t strm_realoutsize
Definition: sctp_structs.h:1118
sctp_association::time_entered
struct timeval time_entered
Definition: sctp_structs.h:792
sctp_association::mapping_array_size
uint16_t mapping_array_size
Definition: sctp_structs.h:1133
sctp_association::last_base_tsnsent
uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]
Definition: sctp_structs.h:976
sctp_association::total_output_queue_size
uint32_t total_output_queue_size
Definition: sctp_structs.h:1007
sctp_association::sent_queue_retran_cnt
unsigned int sent_queue_retran_cnt
Definition: sctp_structs.h:1032
sctp_association::max_send_times
uint16_t max_send_times
Definition: sctp_structs.h:1123
sctp_association::peer_supports_nat
uint8_t peer_supports_nat
Definition: sctp_structs.h:1192
sctp_association::local_auth_chunks
sctp_auth_chklist_t * local_auth_chunks
Definition: sctp_structs.h:1082
sctp_association::highest_tsn_inside_map
uint32_t highest_tsn_inside_map
Definition: sctp_structs.h:953
sctp_association::alternate
struct sctp_nets * alternate
Definition: sctp_structs.h:861
sctp_association::str_reset_seq_out
uint32_t str_reset_seq_out
Definition: sctp_structs.h:899
sctp_association::max_init_times
uint16_t max_init_times
Definition: sctp_structs.h:1122
sctp_association::send_queue
struct sctpchunk_listhead send_queue
Definition: sctp_structs.h:833
sctp_association::streamincnt
uint16_t streamincnt
Definition: sctp_structs.h:1116
sctp_association::strmout
struct sctp_stream_out * strmout
Definition: sctp_structs.h:857
sctp_association::peer_vtag_nonce
uint32_t peer_vtag_nonce
Definition: sctp_structs.h:910
sctp_association::total_flight_count
unsigned int total_flight_count
Definition: sctp_structs.h:1040
sctp_association::sctp_autoclose_ticks
uint32_t sctp_autoclose_ticks
Definition: sctp_structs.h:1058
sctp_association::asconf_seq_out
uint32_t asconf_seq_out
Definition: sctp_structs.h:893
sctp_association::nets
struct sctpnetlisthead nets
Definition: sctp_structs.h:814
sctp_association::auth_supported
uint8_t auth_supported
Definition: sctp_structs.h:1181
sctp_association::last_control_chunk_from
struct sctp_nets * last_control_chunk_from
Definition: sctp_structs.h:867
sctp_association::pending_reply_queue
struct sctp_readhead pending_reply_queue
Definition: sctp_structs.h:876
sctp_association::pr_sctp_cnt
uint32_t pr_sctp_cnt
Definition: sctp_structs.h:1016
sctp_association::stale_cookie_count
uint16_t stale_cookie_count
Definition: sctp_structs.h:1105
sctp_association::deleted_primary
struct sctp_nets * deleted_primary
Definition: sctp_structs.h:812
sctp_association::ctrl_queue_cnt
int ctrl_queue_cnt
Definition: sctp_structs.h:1017
sctp_association::dropped_special_cnt
uint8_t dropped_special_cnt
Definition: sctp_structs.h:1199
sctp_association::idata_supported
uint8_t idata_supported
Definition: sctp_structs.h:1186
sctp_association::last_reset_action
uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]
Definition: sctp_structs.h:974
sctp_association::trigger_reset
uint8_t trigger_reset
Definition: sctp_structs.h:1170
sctp_association::asconf_seq_out_acked
uint32_t asconf_seq_out_acked
Definition: sctp_structs.h:894
sctp_association::my_vtag
uint32_t my_vtag
Definition: sctp_structs.h:904
sctp_association::asconf_ack_sent
struct sctp_asconf_ackhead asconf_ack_sent
Definition: sctp_structs.h:842
sctp_association::cumulative_tsn
uint32_t cumulative_tsn
Definition: sctp_structs.h:943
sctp_association::mapping_array_base_tsn
uint32_t mapping_array_base_tsn
Definition: sctp_structs.h:948
sctp_association::stream_reset_out_is_outstanding
uint8_t stream_reset_out_is_outstanding
Definition: sctp_structs.h:1202
sctp_association::str_reset_seq_in
uint32_t str_reset_seq_in
Definition: sctp_structs.h:901
sctp_association::total_flight
unsigned int total_flight
Definition: sctp_structs.h:1038
sctp_association::stream_queue_cnt
unsigned int stream_queue_cnt
Definition: sctp_structs.h:1024
sctp_association::tsn_last_delivered
uint32_t tsn_last_delivered
Definition: sctp_structs.h:961
sctp_association::sat_t3_loss_recovery
uint8_t sat_t3_loss_recovery
Definition: sctp_structs.h:1198
sctp_association::asconf_queue
struct sctp_asconf_addrhead asconf_queue
Definition: sctp_structs.h:790
sctp_association::asconf_send_queue
struct sctpchunk_listhead asconf_send_queue
Definition: sctp_structs.h:823
sctp_association::control_pdapi
struct sctp_queued_to_read * control_pdapi
Definition: sctp_structs.h:969
sctp_association::saw_sack_with_nr_frags
uint8_t saw_sack_with_nr_frags
Definition: sctp_structs.h:1206
sctp_association::saw_sack_with_frags
uint8_t saw_sack_with_frags
Definition: sctp_structs.h:1205
sctp_association::cookie_how
uint8_t cookie_how[8]
Definition: sctp_structs.h:1215
sctp_association::last_net_cmt_send_started
struct sctp_nets * last_net_cmt_send_started
Definition: sctp_structs.h:863
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Definition: sctp_structs.h:744
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