2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
37 #include <netinet/sctp_var.h>
38 #include <netinet/sctp_sysctl.h>
39 #include <netinet/sctp_pcb.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctputil.h>
42 #include <netinet/sctp_output.h>
43 #include <netinet/sctp_input.h>
44 #include <netinet/sctp_auth.h>
45 #include <netinet/sctp_indata.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_bsd_addr.h>
48 #include <netinet/sctp_timer.h>
49 #include <netinet/sctp_crc32.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
58 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
60 struct sctp_nets *net;
63 * This now not only stops all cookie timers it also stops any INIT
64 * timers as well. This will make sure that the timers are stopped
65 * in all collision cases.
67 SCTP_TCB_LOCK_ASSERT(stcb);
68 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
69 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
70 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
73 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
74 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
75 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
78 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
85 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
86 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
87 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
88 struct sctp_tcb *stcb, int *abort_no_unlock,
89 uint8_t use_mflowid, uint32_t mflowid,
90 uint32_t vrf_id, uint16_t port)
92 struct sctp_init *init;
95 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
100 /* validate length */
101 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
102 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
103 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
104 use_mflowid, mflowid,
107 *abort_no_unlock = 1;
110 /* validate parameters */
112 if (init->initiate_tag == 0) {
113 /* protocol error... send abort */
114 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
115 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
116 use_mflowid, mflowid,
119 *abort_no_unlock = 1;
122 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
123 /* invalid parameter... send abort */
124 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
125 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
126 use_mflowid, mflowid,
129 *abort_no_unlock = 1;
132 if (init->num_inbound_streams == 0) {
133 /* protocol error... send abort */
134 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
135 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
136 use_mflowid, mflowid,
139 *abort_no_unlock = 1;
142 if (init->num_outbound_streams == 0) {
143 /* protocol error... send abort */
144 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
145 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
146 use_mflowid, mflowid,
149 *abort_no_unlock = 1;
152 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
153 offset + ntohs(cp->ch.chunk_length))) {
154 /* auth parameter(s) error... send abort */
155 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
156 "Problem with AUTH parameters");
157 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
158 use_mflowid, mflowid,
161 *abort_no_unlock = 1;
165 * We are only accepting if we have a socket with positive
168 if ((stcb == NULL) &&
169 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
170 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
171 (inp->sctp_socket == NULL) ||
172 (inp->sctp_socket->so_qlimit == 0))) {
174 * FIX ME ?? What about TCP model and we have a
175 * match/restart case? Actually no fix is needed. the lookup
176 * will always find the existing assoc so stcb would not be
177 * NULL. It may be questionable to do this since we COULD
178 * just send back the INIT-ACK and hope that the app did
179 * accept()'s by the time the COOKIE was sent. But there is
180 * a price to pay for COOKIE generation and I don't want to
181 * pay it on the chance that the app will actually do some
182 * accepts(). The App just looses and should NOT be in this
185 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
186 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
188 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
189 use_mflowid, mflowid,
194 if ((stcb != NULL) &&
195 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
196 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
197 sctp_send_shutdown_ack(stcb, NULL);
198 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
200 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
201 sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, src, dst,
203 use_mflowid, mflowid,
205 ((stcb == NULL) ? SCTP_HOLDS_LOCK : SCTP_NOT_LOCKED));
209 SCTP_INP_RUNLOCK(inp);
214 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
218 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
219 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
226 struct sctp_stream_queue_pending *sp;
227 struct sctp_association *asoc;
230 * This function returns the number of streams that have true unsent
231 * data on them. Note that as it looks through it will clean up any
232 * places that have old data that has been sent but left at top of
236 SCTP_TCB_SEND_LOCK(stcb);
237 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
238 /* Check to see if some data queued */
239 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
240 /* sa_ignore FREED_MEMORY */
241 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
245 if ((sp->msg_is_complete) &&
247 (sp->sender_all_done)) {
249 * We are doing differed cleanup. Last time
250 * through when we took all the data the
251 * sender_all_done was not set.
253 if (sp->put_last_out == 0) {
254 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
255 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
261 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
262 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
264 sctp_free_remote_addr(sp->net);
268 sctp_m_freem(sp->data);
271 sctp_free_a_strmoq(stcb, sp, so_locked);
278 SCTP_TCB_SEND_UNLOCK(stcb);
279 return (unsent_data);
283 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
285 struct sctp_init *init;
286 struct sctp_association *asoc;
287 struct sctp_nets *lnet;
292 /* save off parameters */
293 asoc->peer_vtag = ntohl(init->initiate_tag);
294 asoc->peers_rwnd = ntohl(init->a_rwnd);
296 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
298 if (!TAILQ_EMPTY(&asoc->nets)) {
299 /* update any ssthresh's that may have a default */
300 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
301 lnet->ssthresh = asoc->peers_rwnd;
302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
303 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
307 SCTP_TCB_SEND_LOCK(stcb);
308 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
310 struct sctp_stream_out *outs;
311 struct sctp_stream_queue_pending *sp, *nsp;
312 struct sctp_tmit_chunk *chk, *nchk;
314 /* abandon the upper streams */
315 newcnt = ntohs(init->num_inbound_streams);
316 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
317 if (chk->rec.data.stream_number >= newcnt) {
318 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
319 asoc->send_queue_cnt--;
320 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
321 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
324 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
327 if (chk->data != NULL) {
328 sctp_free_bufspace(stcb, asoc, chk, 1);
329 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
330 0, chk, SCTP_SO_NOT_LOCKED);
332 sctp_m_freem(chk->data);
336 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
337 /* sa_ignore FREED_MEMORY */
341 for (i = newcnt; i < asoc->pre_open_streams; i++) {
342 outs = &asoc->strmout[i];
343 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
344 TAILQ_REMOVE(&outs->outqueue, sp, next);
345 asoc->stream_queue_cnt--;
346 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
347 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
349 sctp_m_freem(sp->data);
353 sctp_free_remote_addr(sp->net);
357 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
358 /* sa_ignore FREED_MEMORY */
362 /* cut back the count */
363 asoc->pre_open_streams = newcnt;
365 SCTP_TCB_SEND_UNLOCK(stcb);
366 asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams;
368 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
369 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
370 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
371 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
373 /* This is the next one we expect */
374 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
376 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
377 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
379 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
380 /* open the requested streams */
382 if (asoc->strmin != NULL) {
383 /* Free the old ones */
384 struct sctp_queued_to_read *ctl, *nctl;
386 for (i = 0; i < asoc->streamincnt; i++) {
387 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
388 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
389 sctp_free_remote_addr(ctl->whoFrom);
391 sctp_m_freem(ctl->data);
393 sctp_free_a_readq(stcb, ctl);
396 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
398 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
399 asoc->streamincnt = ntohs(init->num_outbound_streams);
401 asoc->streamincnt = asoc->max_inbound_streams;
403 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
404 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
405 if (asoc->strmin == NULL) {
406 /* we didn't get memory for the streams! */
407 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
410 for (i = 0; i < asoc->streamincnt; i++) {
411 asoc->strmin[i].stream_no = i;
412 asoc->strmin[i].last_sequence_delivered = 0xffff;
413 TAILQ_INIT(&asoc->strmin[i].inqueue);
414 asoc->strmin[i].delivery_started = 0;
417 * load_address_from_init will put the addresses into the
418 * association when the COOKIE is processed or the INIT-ACK is
419 * processed. Both types of COOKIE's existing and new call this
420 * routine. It will remove addresses that are no longer in the
421 * association (for the restarting case where addresses are
422 * removed). Up front when the INIT arrives we will discard it if it
423 * is a restart and new addresses have been added.
425 /* sa_ignore MEMLEAK */
430 * INIT-ACK message processing/consumption returns value < 0 on error
433 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
434 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
435 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
436 struct sctp_nets *net, int *abort_no_unlock,
437 uint8_t use_mflowid, uint32_t mflowid,
440 struct sctp_association *asoc;
442 int retval, abort_flag;
443 uint32_t initack_limit;
444 int nat_friendly = 0;
446 /* First verify that we have no illegal param's */
449 op_err = sctp_arethere_unrecognized_parameters(m,
450 (offset + sizeof(struct sctp_init_chunk)),
451 &abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
453 /* Send an abort and notify peer */
454 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
455 *abort_no_unlock = 1;
459 asoc->peer_supports_nat = (uint8_t) nat_friendly;
460 /* process the peer's parameters in the INIT-ACK */
461 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
465 initack_limit = offset + ntohs(cp->ch.chunk_length);
466 /* load all addresses */
467 if ((retval = sctp_load_addresses_from_init(stcb, m,
468 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
470 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
471 "Problem with address parameters");
472 SCTPDBG(SCTP_DEBUG_INPUT1,
473 "Load addresses from INIT causes an abort %d\n",
475 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
476 src, dst, sh, op_err,
477 use_mflowid, mflowid,
479 *abort_no_unlock = 1;
482 /* if the peer doesn't support asconf, flush the asconf queue */
483 if (asoc->peer_supports_asconf == 0) {
484 struct sctp_asconf_addr *param, *nparam;
486 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
487 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
488 SCTP_FREE(param, SCTP_M_ASC_ADDR);
491 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
492 stcb->asoc.local_hmacs);
494 sctp_queue_op_err(stcb, op_err);
495 /* queuing will steal away the mbuf chain to the out queue */
498 /* extract the cookie and queue it to "echo" it back... */
499 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
500 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
501 stcb->asoc.overall_error_count,
503 SCTP_FROM_SCTP_INPUT,
506 stcb->asoc.overall_error_count = 0;
507 net->error_count = 0;
510 * Cancel the INIT timer, We do this first before queueing the
511 * cookie. We always cancel at the primary to assue that we are
512 * canceling the timer started by the INIT which always goes to the
515 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
516 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
518 /* calculate the RTO */
519 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered, sctp_align_safe_nocopy,
520 SCTP_RTT_FROM_NON_DATA);
522 retval = sctp_send_cookie_echo(m, offset, stcb, net);
525 * No cookie, we probably should send a op error. But in any
526 * case if there is no cookie in the INIT-ACK, we can
527 * abandon the peer, its broke.
530 /* We abort with an error of missing mandatory param */
531 op_err = sctp_generate_cause(SCTP_CAUSE_MISSING_PARAM, "");
534 * Expand beyond to include the mandatory
537 struct sctp_inv_mandatory_param *mp;
539 SCTP_BUF_LEN(op_err) =
540 sizeof(struct sctp_inv_mandatory_param);
542 struct sctp_inv_mandatory_param *);
543 /* Subtract the reserved param */
545 htons(sizeof(struct sctp_inv_mandatory_param) - 2);
546 mp->num_param = htonl(1);
547 mp->param = htons(SCTP_STATE_COOKIE);
550 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
551 src, dst, sh, op_err,
552 use_mflowid, mflowid,
554 *abort_no_unlock = 1;
562 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
563 struct sctp_tcb *stcb, struct sctp_nets *net)
565 struct sockaddr_storage store;
566 struct sctp_nets *r_net, *f_net;
569 uint16_t old_error_counter;
572 struct sockaddr_in *sin;
576 struct sockaddr_in6 *sin6;
580 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
584 memset(&store, 0, sizeof(store));
585 switch (cp->heartbeat.hb_info.addr_family) {
588 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
589 sin = (struct sockaddr_in *)&store;
590 sin->sin_family = cp->heartbeat.hb_info.addr_family;
591 sin->sin_len = cp->heartbeat.hb_info.addr_len;
592 sin->sin_port = stcb->rport;
593 memcpy(&sin->sin_addr, cp->heartbeat.hb_info.address,
594 sizeof(sin->sin_addr));
602 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
603 sin6 = (struct sockaddr_in6 *)&store;
604 sin6->sin6_family = cp->heartbeat.hb_info.addr_family;
605 sin6->sin6_len = cp->heartbeat.hb_info.addr_len;
606 sin6->sin6_port = stcb->rport;
607 memcpy(&sin6->sin6_addr, cp->heartbeat.hb_info.address,
608 sizeof(sin6->sin6_addr));
617 r_net = sctp_findnet(stcb, (struct sockaddr *)&store);
619 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
622 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
623 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
624 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
626 * If the its a HB and it's random value is correct when can
627 * confirm the destination.
629 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
630 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
631 stcb->asoc.primary_destination = r_net;
632 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
633 f_net = TAILQ_FIRST(&stcb->asoc.nets);
634 if (f_net != r_net) {
636 * first one on the list is NOT the primary
637 * sctp_cmpaddr() is much more efficent if
638 * the primary is the first on the list,
641 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
642 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
646 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
647 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
648 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
649 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
651 old_error_counter = r_net->error_count;
652 r_net->error_count = 0;
653 r_net->hb_responded = 1;
654 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
655 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
656 /* Now lets do a RTO with this */
657 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv, sctp_align_safe_nocopy,
658 SCTP_RTT_FROM_NON_DATA);
659 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
660 r_net->dest_state |= SCTP_ADDR_REACHABLE;
661 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
662 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
664 if (r_net->dest_state & SCTP_ADDR_PF) {
665 r_net->dest_state &= ~SCTP_ADDR_PF;
666 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
668 if (old_error_counter > 0) {
669 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
670 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
672 if (r_net == stcb->asoc.primary_destination) {
673 if (stcb->asoc.alternate) {
674 /* release the alternate, primary is good */
675 sctp_free_remote_addr(stcb->asoc.alternate);
676 stcb->asoc.alternate = NULL;
679 /* Mobility adaptation */
681 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
682 SCTP_MOBILITY_BASE) ||
683 sctp_is_mobility_feature_on(stcb->sctp_ep,
684 SCTP_MOBILITY_FASTHANDOFF)) &&
685 sctp_is_mobility_feature_on(stcb->sctp_ep,
686 SCTP_MOBILITY_PRIM_DELETED)) {
688 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
689 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
690 SCTP_MOBILITY_FASTHANDOFF)) {
691 sctp_assoc_immediate_retrans(stcb,
692 stcb->asoc.primary_destination);
694 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
695 SCTP_MOBILITY_BASE)) {
696 sctp_move_chunks_from_net(stcb,
697 stcb->asoc.deleted_primary);
699 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
700 stcb->asoc.deleted_primary);
706 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
709 * return 0 means we want you to proceed with the abort non-zero
710 * means no abort processing
712 struct sctpasochead *head;
714 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
715 /* generate a new vtag and send init */
716 LIST_REMOVE(stcb, sctp_asocs);
717 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
718 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
720 * put it in the bucket in the vtag hash of assoc's for the
723 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
724 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
727 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
729 * treat like a case where the cookie expired i.e.: - dump
730 * current cookie. - generate a new vtag. - resend init.
732 /* generate a new vtag and send init */
733 LIST_REMOVE(stcb, sctp_asocs);
734 stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
735 stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
736 sctp_stop_all_cookie_timers(stcb);
737 sctp_toss_old_cookies(stcb, &stcb->asoc);
738 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
739 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
741 * put it in the bucket in the vtag hash of assoc's for the
744 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
745 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
752 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
753 struct sctp_nets *net)
756 * return 0 means we want you to proceed with the abort non-zero
757 * means no abort processing
759 if (stcb->asoc.peer_supports_auth == 0) {
760 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
763 sctp_asconf_send_nat_state_update(stcb, net);
769 sctp_handle_abort(struct sctp_abort_chunk *abort,
770 struct sctp_tcb *stcb, struct sctp_nets *net)
772 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
779 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
783 len = ntohs(abort->ch.chunk_length);
784 if (len > sizeof(struct sctp_chunkhdr)) {
786 * Need to check the cause codes for our two magic nat
787 * aborts which don't kill the assoc necessarily.
789 struct sctp_missing_nat_state *natc;
791 natc = (struct sctp_missing_nat_state *)(abort + 1);
792 error = ntohs(natc->cause);
793 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
794 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
795 abort->ch.chunk_flags);
796 if (sctp_handle_nat_colliding_state(stcb)) {
799 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
800 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
801 abort->ch.chunk_flags);
802 if (sctp_handle_nat_missing_state(stcb, net)) {
809 /* stop any receive timers */
810 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
811 /* notify user of the abort and clean up... */
812 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
814 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
815 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
816 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
817 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
819 #ifdef SCTP_ASOCLOG_OF_TSNS
820 sctp_print_out_track_log(stcb);
822 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
823 so = SCTP_INP_SO(stcb->sctp_ep);
824 atomic_add_int(&stcb->asoc.refcnt, 1);
825 SCTP_TCB_UNLOCK(stcb);
826 SCTP_SOCKET_LOCK(so, 1);
828 atomic_subtract_int(&stcb->asoc.refcnt, 1);
830 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
831 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
832 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
833 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
834 SCTP_SOCKET_UNLOCK(so, 1);
836 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
840 sctp_start_net_timers(struct sctp_tcb *stcb)
842 uint32_t cnt_hb_sent;
843 struct sctp_nets *net;
846 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
848 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
849 * If the dest in unconfirmed send a hb as well if under
850 * max_hb_burst have been sent.
852 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
853 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
854 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
855 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
856 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
861 sctp_chunk_output(stcb->sctp_ep, stcb,
862 SCTP_OUTPUT_FROM_COOKIE_ACK,
869 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
870 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
872 struct sctp_association *asoc;
873 int some_on_streamwheel;
875 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
880 SCTPDBG(SCTP_DEBUG_INPUT2,
881 "sctp_handle_shutdown: handling SHUTDOWN\n");
885 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
886 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
889 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
890 /* Shutdown NOT the expected size */
893 sctp_update_acked(stcb, cp, abort_flag);
898 if (asoc->control_pdapi) {
900 * With a normal shutdown we assume the end of last record.
902 SCTP_INP_READ_LOCK(stcb->sctp_ep);
903 asoc->control_pdapi->end_added = 1;
904 asoc->control_pdapi->pdapi_aborted = 1;
905 asoc->control_pdapi = NULL;
906 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
907 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
908 so = SCTP_INP_SO(stcb->sctp_ep);
909 atomic_add_int(&stcb->asoc.refcnt, 1);
910 SCTP_TCB_UNLOCK(stcb);
911 SCTP_SOCKET_LOCK(so, 1);
913 atomic_subtract_int(&stcb->asoc.refcnt, 1);
914 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
915 /* assoc was freed while we were unlocked */
916 SCTP_SOCKET_UNLOCK(so, 1);
920 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
921 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
922 SCTP_SOCKET_UNLOCK(so, 1);
925 /* goto SHUTDOWN_RECEIVED state to block new requests */
926 if (stcb->sctp_socket) {
927 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
928 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
929 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
930 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
931 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
933 * notify upper layer that peer has initiated a
936 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
939 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
942 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
944 * stop the shutdown timer, since we WILL move to
947 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
949 /* Now is there unsent data on a stream somewhere? */
950 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
952 if (!TAILQ_EMPTY(&asoc->send_queue) ||
953 !TAILQ_EMPTY(&asoc->sent_queue) ||
954 some_on_streamwheel) {
955 /* By returning we will push more data out */
958 /* no outstanding data to send, so move on... */
959 /* send SHUTDOWN-ACK */
960 /* move to SHUTDOWN-ACK-SENT state */
961 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
962 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
963 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
965 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
966 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
967 sctp_stop_timers_for_shutdown(stcb);
968 sctp_send_shutdown_ack(stcb, net);
969 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep,
975 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
976 struct sctp_tcb *stcb,
977 struct sctp_nets *net)
979 struct sctp_association *asoc;
981 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
984 so = SCTP_INP_SO(stcb->sctp_ep);
986 SCTPDBG(SCTP_DEBUG_INPUT2,
987 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
992 /* process according to association state */
993 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
994 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
995 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
996 sctp_send_shutdown_complete(stcb, net, 1);
997 SCTP_TCB_UNLOCK(stcb);
1000 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
1001 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1002 /* unexpected SHUTDOWN-ACK... so ignore... */
1003 SCTP_TCB_UNLOCK(stcb);
1006 if (asoc->control_pdapi) {
1008 * With a normal shutdown we assume the end of last record.
1010 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1011 asoc->control_pdapi->end_added = 1;
1012 asoc->control_pdapi->pdapi_aborted = 1;
1013 asoc->control_pdapi = NULL;
1014 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1015 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1016 atomic_add_int(&stcb->asoc.refcnt, 1);
1017 SCTP_TCB_UNLOCK(stcb);
1018 SCTP_SOCKET_LOCK(so, 1);
1019 SCTP_TCB_LOCK(stcb);
1020 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1021 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1022 /* assoc was freed while we were unlocked */
1023 SCTP_SOCKET_UNLOCK(so, 1);
1027 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1028 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1029 SCTP_SOCKET_UNLOCK(so, 1);
1033 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1034 !TAILQ_EMPTY(&asoc->sent_queue) ||
1035 !stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
1036 panic("Queues are not empty when handling SHUTDOWN-ACK");
1039 /* stop the timer */
1040 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
1041 /* send SHUTDOWN-COMPLETE */
1042 sctp_send_shutdown_complete(stcb, net, 0);
1043 /* notify upper layer protocol */
1044 if (stcb->sctp_socket) {
1045 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1046 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1047 stcb->sctp_socket->so_snd.sb_cc = 0;
1049 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1051 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1052 /* free the TCB but first save off the ep */
1053 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1054 atomic_add_int(&stcb->asoc.refcnt, 1);
1055 SCTP_TCB_UNLOCK(stcb);
1056 SCTP_SOCKET_LOCK(so, 1);
1057 SCTP_TCB_LOCK(stcb);
1058 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1060 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1061 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1062 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1063 SCTP_SOCKET_UNLOCK(so, 1);
1068 * Skip past the param header and then we will find the chunk that caused the
1069 * problem. There are two possiblities ASCONF or FWD-TSN other than that and
1070 * our peer must be broken.
1073 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr,
1074 struct sctp_nets *net)
1076 struct sctp_chunkhdr *chk;
1078 chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr));
1079 switch (chk->chunk_type) {
1080 case SCTP_ASCONF_ACK:
1082 sctp_asconf_cleanup(stcb, net);
1084 case SCTP_FORWARD_CUM_TSN:
1085 stcb->asoc.prsctp_supported = 0;
1088 SCTPDBG(SCTP_DEBUG_INPUT2,
1089 "Peer does not support chunk type %d(%x)??\n",
1090 chk->chunk_type, (uint32_t) chk->chunk_type);
1096 * Skip past the param header and then we will find the param that caused the
1097 * problem. There are a number of param's in a ASCONF OR the prsctp param
1098 * these will turn of specific features.
1101 sctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr)
1103 struct sctp_paramhdr *pbad;
1106 switch (ntohs(pbad->param_type)) {
1108 case SCTP_PRSCTP_SUPPORTED:
1109 stcb->asoc.prsctp_supported = 0;
1111 case SCTP_SUPPORTED_CHUNK_EXT:
1113 /* draft-ietf-tsvwg-addip-sctp */
1114 case SCTP_HAS_NAT_SUPPORT:
1115 stcb->asoc.peer_supports_nat = 0;
1117 case SCTP_ADD_IP_ADDRESS:
1118 case SCTP_DEL_IP_ADDRESS:
1119 case SCTP_SET_PRIM_ADDR:
1120 stcb->asoc.peer_supports_asconf = 0;
1122 case SCTP_SUCCESS_REPORT:
1123 case SCTP_ERROR_CAUSE_IND:
1124 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1125 SCTPDBG(SCTP_DEBUG_INPUT2,
1126 "Turning off ASCONF to this strange peer\n");
1127 stcb->asoc.peer_supports_asconf = 0;
1130 SCTPDBG(SCTP_DEBUG_INPUT2,
1131 "Peer does not support param type %d(%x)??\n",
1132 pbad->param_type, (uint32_t) pbad->param_type);
1138 sctp_handle_error(struct sctp_chunkhdr *ch,
1139 struct sctp_tcb *stcb, struct sctp_nets *net)
1142 struct sctp_paramhdr *phdr;
1143 uint16_t error, error_type;
1145 struct sctp_association *asoc;
1148 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1153 /* parse through all of the errors and process */
1155 phdr = (struct sctp_paramhdr *)((caddr_t)ch +
1156 sizeof(struct sctp_chunkhdr));
1157 chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr);
1159 while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) {
1160 /* Process an Error Cause */
1161 error_type = ntohs(phdr->param_type);
1162 error_len = ntohs(phdr->param_length);
1163 if ((error_len > chklen) || (error_len == 0)) {
1164 /* invalid param length for this param */
1165 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n",
1170 /* report the first error cause */
1173 switch (error_type) {
1174 case SCTP_CAUSE_INVALID_STREAM:
1175 case SCTP_CAUSE_MISSING_PARAM:
1176 case SCTP_CAUSE_INVALID_PARAM:
1177 case SCTP_CAUSE_NO_USER_DATA:
1178 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n",
1181 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1182 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
1184 if (sctp_handle_nat_colliding_state(stcb)) {
1188 case SCTP_CAUSE_NAT_MISSING_STATE:
1189 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
1191 if (sctp_handle_nat_missing_state(stcb, net)) {
1195 case SCTP_CAUSE_STALE_COOKIE:
1197 * We only act if we have echoed a cookie and are
1200 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
1203 p = (int *)((caddr_t)phdr + sizeof(*phdr));
1204 /* Save the time doubled */
1205 asoc->cookie_preserve_req = ntohl(*p) << 1;
1206 asoc->stale_cookie_count++;
1207 if (asoc->stale_cookie_count >
1208 asoc->max_init_times) {
1209 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1210 /* now free the asoc */
1211 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1212 so = SCTP_INP_SO(stcb->sctp_ep);
1213 atomic_add_int(&stcb->asoc.refcnt, 1);
1214 SCTP_TCB_UNLOCK(stcb);
1215 SCTP_SOCKET_LOCK(so, 1);
1216 SCTP_TCB_LOCK(stcb);
1217 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1219 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1220 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1221 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1222 SCTP_SOCKET_UNLOCK(so, 1);
1226 /* blast back to INIT state */
1227 sctp_toss_old_cookies(stcb, &stcb->asoc);
1228 asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
1229 asoc->state |= SCTP_STATE_COOKIE_WAIT;
1230 sctp_stop_all_cookie_timers(stcb);
1231 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1234 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1236 * Nothing we can do here, we don't do hostname
1237 * addresses so if the peer does not like my IPv6
1238 * (or IPv4 for that matter) it does not matter. If
1239 * they don't support that type of address, they can
1240 * NOT possibly get that packet type... i.e. with no
1241 * IPv6 you can't recieve a IPv6 packet. so we can
1242 * safely ignore this one. If we ever added support
1243 * for HOSTNAME Addresses, then we would need to do
1247 case SCTP_CAUSE_UNRECOG_CHUNK:
1248 sctp_process_unrecog_chunk(stcb, phdr, net);
1250 case SCTP_CAUSE_UNRECOG_PARAM:
1251 sctp_process_unrecog_param(stcb, phdr);
1253 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1255 * We ignore this since the timer will drive out a
1256 * new cookie anyway and there timer will drive us
1257 * to send a SHUTDOWN_COMPLETE. We can't send one
1258 * here since we don't have their tag.
1261 case SCTP_CAUSE_DELETING_LAST_ADDR:
1262 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1263 case SCTP_CAUSE_DELETING_SRC_ADDR:
1265 * We should NOT get these here, but in a
1268 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n",
1271 case SCTP_CAUSE_OUT_OF_RESC:
1273 * And what, pray tell do we do with the fact that
1274 * the peer is out of resources? Not really sure we
1275 * could do anything but abort. I suspect this
1276 * should have came WITH an abort instead of in a
1281 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n",
1285 adjust = SCTP_SIZE32(error_len);
1287 phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust);
1289 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, error, ch, SCTP_SO_NOT_LOCKED);
1294 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1295 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1296 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1297 struct sctp_nets *net, int *abort_no_unlock,
1298 uint8_t use_mflowid, uint32_t mflowid,
1301 struct sctp_init_ack *init_ack;
1302 struct mbuf *op_err;
1304 SCTPDBG(SCTP_DEBUG_INPUT2,
1305 "sctp_handle_init_ack: handling INIT-ACK\n");
1308 SCTPDBG(SCTP_DEBUG_INPUT2,
1309 "sctp_handle_init_ack: TCB is null\n");
1312 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1313 /* Invalid length */
1314 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1315 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1316 src, dst, sh, op_err,
1317 use_mflowid, mflowid,
1319 *abort_no_unlock = 1;
1322 init_ack = &cp->init;
1323 /* validate parameters */
1324 if (init_ack->initiate_tag == 0) {
1325 /* protocol error... send an abort */
1326 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1327 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1328 src, dst, sh, op_err,
1329 use_mflowid, mflowid,
1331 *abort_no_unlock = 1;
1334 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1335 /* protocol error... send an abort */
1336 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1337 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1338 src, dst, sh, op_err,
1339 use_mflowid, mflowid,
1341 *abort_no_unlock = 1;
1344 if (init_ack->num_inbound_streams == 0) {
1345 /* protocol error... send an abort */
1346 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1347 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1348 src, dst, sh, op_err,
1349 use_mflowid, mflowid,
1351 *abort_no_unlock = 1;
1354 if (init_ack->num_outbound_streams == 0) {
1355 /* protocol error... send an abort */
1356 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1357 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1358 src, dst, sh, op_err,
1359 use_mflowid, mflowid,
1361 *abort_no_unlock = 1;
1364 /* process according to association state... */
1365 switch (stcb->asoc.state & SCTP_STATE_MASK) {
1366 case SCTP_STATE_COOKIE_WAIT:
1367 /* this is the expected state for this chunk */
1368 /* process the INIT-ACK parameters */
1369 if (stcb->asoc.primary_destination->dest_state &
1370 SCTP_ADDR_UNCONFIRMED) {
1372 * The primary is where we sent the INIT, we can
1373 * always consider it confirmed when the INIT-ACK is
1374 * returned. Do this before we load addresses
1377 stcb->asoc.primary_destination->dest_state &=
1378 ~SCTP_ADDR_UNCONFIRMED;
1379 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1380 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1382 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1383 net, abort_no_unlock,
1384 use_mflowid, mflowid,
1386 /* error in parsing parameters */
1389 /* update our state */
1390 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1391 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
1393 /* reset the RTO calc */
1394 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1395 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1396 stcb->asoc.overall_error_count,
1398 SCTP_FROM_SCTP_INPUT,
1401 stcb->asoc.overall_error_count = 0;
1402 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1404 * collapse the init timer back in case of a exponential
1407 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1410 * the send at the end of the inbound data processing will
1411 * cause the cookie to be sent
1414 case SCTP_STATE_SHUTDOWN_SENT:
1415 /* incorrect state... discard */
1417 case SCTP_STATE_COOKIE_ECHOED:
1418 /* incorrect state... discard */
1420 case SCTP_STATE_OPEN:
1421 /* incorrect state... discard */
1423 case SCTP_STATE_EMPTY:
1424 case SCTP_STATE_INUSE:
1426 /* incorrect state... discard */
1430 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1434 static struct sctp_tcb *
1435 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1436 struct sockaddr *src, struct sockaddr *dst,
1437 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1438 struct sctp_inpcb *inp, struct sctp_nets **netp,
1439 struct sockaddr *init_src, int *notification,
1440 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1441 uint8_t use_mflowid, uint32_t mflowid,
1442 uint32_t vrf_id, uint16_t port);
1446 * handle a state cookie for an existing association m: input packet mbuf
1447 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1448 * "split" mbuf and the cookie signature does not exist offset: offset into
1449 * mbuf to the cookie-echo chunk
1451 static struct sctp_tcb *
1452 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1453 struct sockaddr *src, struct sockaddr *dst,
1454 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1455 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1456 struct sockaddr *init_src, int *notification,
1457 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1458 uint8_t use_mflowid, uint32_t mflowid,
1459 uint32_t vrf_id, uint16_t port)
1461 struct sctp_association *asoc;
1462 struct sctp_init_chunk *init_cp, init_buf;
1463 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1464 struct sctp_nets *net;
1465 struct mbuf *op_err;
1466 int init_offset, initack_offset, i;
1472 /* I know that the TCB is non-NULL from the caller */
1474 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1475 if (asoc->cookie_how[how_indx] == 0)
1478 if (how_indx < sizeof(asoc->cookie_how)) {
1479 asoc->cookie_how[how_indx] = 1;
1481 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1482 /* SHUTDOWN came in after sending INIT-ACK */
1483 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1484 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1485 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1486 use_mflowid, mflowid,
1488 if (how_indx < sizeof(asoc->cookie_how))
1489 asoc->cookie_how[how_indx] = 2;
1493 * find and validate the INIT chunk in the cookie (peer's info) the
1494 * INIT should start after the cookie-echo header struct (chunk
1495 * header, state cookie header struct)
1497 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1499 init_cp = (struct sctp_init_chunk *)
1500 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1501 (uint8_t *) & init_buf);
1502 if (init_cp == NULL) {
1503 /* could not pull a INIT chunk in cookie */
1506 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1510 * find and validate the INIT-ACK chunk in the cookie (my info) the
1511 * INIT-ACK follows the INIT chunk
1513 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1514 initack_cp = (struct sctp_init_ack_chunk *)
1515 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1516 (uint8_t *) & initack_buf);
1517 if (initack_cp == NULL) {
1518 /* could not pull INIT-ACK chunk in cookie */
1521 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1524 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1525 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1527 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1528 * to get into the OPEN state
1530 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1532 * Opps, this means that we somehow generated two vtag's
1533 * the same. I.e. we did:
1535 * <---INIT(tag=a)------
1536 * ----INIT-ACK(tag=t)-->
1537 * ----INIT(tag=t)------> *1
1538 * <---INIT-ACK(tag=a)---
1539 * <----CE(tag=t)------------- *2
1541 * At point *1 we should be generating a different
1542 * tag t'. Which means we would throw away the CE and send
1543 * ours instead. Basically this is case C (throw away side).
1545 if (how_indx < sizeof(asoc->cookie_how))
1546 asoc->cookie_how[how_indx] = 17;
1550 switch (SCTP_GET_STATE(asoc)) {
1551 case SCTP_STATE_COOKIE_WAIT:
1552 case SCTP_STATE_COOKIE_ECHOED:
1554 * INIT was sent but got a COOKIE_ECHO with the
1555 * correct tags... just accept it...but we must
1556 * process the init so that we can make sure we have
1557 * the right seq no's.
1559 /* First we must process the INIT !! */
1560 retval = sctp_process_init(init_cp, stcb);
1562 if (how_indx < sizeof(asoc->cookie_how))
1563 asoc->cookie_how[how_indx] = 3;
1566 /* we have already processed the INIT so no problem */
1567 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb,
1568 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1569 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1570 /* update current state */
1571 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1572 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1574 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1576 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1577 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1578 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1579 stcb->sctp_ep, stcb, asoc->primary_destination);
1581 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1582 sctp_stop_all_cookie_timers(stcb);
1583 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1584 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1585 (inp->sctp_socket->so_qlimit == 0)
1587 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1592 * Here is where collision would go if we
1593 * did a connect() and instead got a
1594 * init/init-ack/cookie done before the
1595 * init-ack came back..
1597 stcb->sctp_ep->sctp_flags |=
1598 SCTP_PCB_FLAGS_CONNECTED;
1599 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1600 so = SCTP_INP_SO(stcb->sctp_ep);
1601 atomic_add_int(&stcb->asoc.refcnt, 1);
1602 SCTP_TCB_UNLOCK(stcb);
1603 SCTP_SOCKET_LOCK(so, 1);
1604 SCTP_TCB_LOCK(stcb);
1605 atomic_add_int(&stcb->asoc.refcnt, -1);
1606 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1607 SCTP_SOCKET_UNLOCK(so, 1);
1611 soisconnected(stcb->sctp_socket);
1612 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1613 SCTP_SOCKET_UNLOCK(so, 1);
1616 /* notify upper layer */
1617 *notification = SCTP_NOTIFY_ASSOC_UP;
1619 * since we did not send a HB make sure we don't
1622 net->hb_responded = 1;
1623 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1624 &cookie->time_entered,
1625 sctp_align_unsafe_makecopy,
1626 SCTP_RTT_FROM_NON_DATA);
1628 if (stcb->asoc.sctp_autoclose_ticks &&
1629 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1630 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1636 * we're in the OPEN state (or beyond), so peer must
1637 * have simply lost the COOKIE-ACK
1641 sctp_stop_all_cookie_timers(stcb);
1643 * We ignore the return code here.. not sure if we should
1644 * somehow abort.. but we do have an existing asoc. This
1645 * really should not fail.
1647 if (sctp_load_addresses_from_init(stcb, m,
1648 init_offset + sizeof(struct sctp_init_chunk),
1649 initack_offset, src, dst, init_src)) {
1650 if (how_indx < sizeof(asoc->cookie_how))
1651 asoc->cookie_how[how_indx] = 4;
1654 /* respond with a COOKIE-ACK */
1655 sctp_toss_old_cookies(stcb, asoc);
1656 sctp_send_cookie_ack(stcb);
1657 if (how_indx < sizeof(asoc->cookie_how))
1658 asoc->cookie_how[how_indx] = 5;
1661 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1662 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1663 cookie->tie_tag_my_vtag == 0 &&
1664 cookie->tie_tag_peer_vtag == 0) {
1666 * case C in Section 5.2.4 Table 2: XMOO silently discard
1668 if (how_indx < sizeof(asoc->cookie_how))
1669 asoc->cookie_how[how_indx] = 6;
1673 * If nat support, and the below and stcb is established, send back
1674 * a ABORT(colliding state) if we are established.
1676 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
1677 (asoc->peer_supports_nat) &&
1678 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1679 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1680 (asoc->peer_vtag == 0)))) {
1682 * Special case - Peer's support nat. We may have two init's
1683 * that we gave out the same tag on since one was not
1684 * established.. i.e. we get INIT from host-1 behind the nat
1685 * and we respond tag-a, we get a INIT from host-2 behind
1686 * the nat and we get tag-a again. Then we bring up host-1
1687 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1688 * Now we have colliding state. We must send an abort here
1689 * with colliding state indication.
1691 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1692 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1693 use_mflowid, mflowid,
1697 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1698 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1699 (asoc->peer_vtag == 0))) {
1701 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1702 * should be ok, re-accept peer info
1704 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1706 * Extension of case C. If we hit this, then the
1707 * random number generator returned the same vtag
1708 * when we first sent our INIT-ACK and when we later
1709 * sent our INIT. The side with the seq numbers that
1710 * are different will be the one that normnally
1711 * would have hit case C. This in effect "extends"
1712 * our vtags in this collision case to be 64 bits.
1713 * The same collision could occur aka you get both
1714 * vtag and seq number the same twice in a row.. but
1715 * is much less likely. If it did happen then we
1716 * would proceed through and bring up the assoc.. we
1717 * may end up with the wrong stream setup however..
1718 * which would be bad.. but there is no way to
1719 * tell.. until we send on a stream that does not
1722 if (how_indx < sizeof(asoc->cookie_how))
1723 asoc->cookie_how[how_indx] = 7;
1727 if (how_indx < sizeof(asoc->cookie_how))
1728 asoc->cookie_how[how_indx] = 8;
1729 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1730 sctp_stop_all_cookie_timers(stcb);
1732 * since we did not send a HB make sure we don't double
1735 net->hb_responded = 1;
1736 if (stcb->asoc.sctp_autoclose_ticks &&
1737 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1738 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1741 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1742 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1744 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1746 * Ok the peer probably discarded our data (if we
1747 * echoed a cookie+data). So anything on the
1748 * sent_queue should be marked for retransmit, we
1749 * may not get something to kick us so it COULD
1750 * still take a timeout to move these.. but it can't
1751 * hurt to mark them.
1753 struct sctp_tmit_chunk *chk;
1755 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1756 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1757 chk->sent = SCTP_DATAGRAM_RESEND;
1758 sctp_flight_size_decrease(chk);
1759 sctp_total_flight_decrease(stcb, chk);
1760 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1766 /* process the INIT info (peer's info) */
1767 retval = sctp_process_init(init_cp, stcb);
1769 if (how_indx < sizeof(asoc->cookie_how))
1770 asoc->cookie_how[how_indx] = 9;
1773 if (sctp_load_addresses_from_init(stcb, m,
1774 init_offset + sizeof(struct sctp_init_chunk),
1775 initack_offset, src, dst, init_src)) {
1776 if (how_indx < sizeof(asoc->cookie_how))
1777 asoc->cookie_how[how_indx] = 10;
1780 if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
1781 (asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
1782 *notification = SCTP_NOTIFY_ASSOC_UP;
1784 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1785 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1786 (inp->sctp_socket->so_qlimit == 0)) {
1787 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1791 stcb->sctp_ep->sctp_flags |=
1792 SCTP_PCB_FLAGS_CONNECTED;
1793 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1794 so = SCTP_INP_SO(stcb->sctp_ep);
1795 atomic_add_int(&stcb->asoc.refcnt, 1);
1796 SCTP_TCB_UNLOCK(stcb);
1797 SCTP_SOCKET_LOCK(so, 1);
1798 SCTP_TCB_LOCK(stcb);
1799 atomic_add_int(&stcb->asoc.refcnt, -1);
1800 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1801 SCTP_SOCKET_UNLOCK(so, 1);
1805 soisconnected(stcb->sctp_socket);
1806 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1807 SCTP_SOCKET_UNLOCK(so, 1);
1810 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1811 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1813 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1814 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1815 } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1816 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1818 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1820 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1821 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1822 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1823 stcb->sctp_ep, stcb, asoc->primary_destination);
1825 sctp_stop_all_cookie_timers(stcb);
1826 sctp_toss_old_cookies(stcb, asoc);
1827 sctp_send_cookie_ack(stcb);
1830 * only if we have retrans set do we do this. What
1831 * this call does is get only the COOKIE-ACK out and
1832 * then when we return the normal call to
1833 * sctp_chunk_output will get the retrans out behind
1836 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1838 if (how_indx < sizeof(asoc->cookie_how))
1839 asoc->cookie_how[how_indx] = 11;
1843 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1844 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1845 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1846 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1847 cookie->tie_tag_peer_vtag != 0) {
1848 struct sctpasochead *head;
1850 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1855 if (asoc->peer_supports_nat) {
1857 * This is a gross gross hack. Just call the
1858 * cookie_new code since we are allowing a duplicate
1859 * association. I hope this works...
1861 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1862 sh, cookie, cookie_len,
1863 inp, netp, init_src, notification,
1864 auth_skipped, auth_offset, auth_len,
1865 use_mflowid, mflowid,
1869 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1872 if (how_indx < sizeof(asoc->cookie_how))
1873 asoc->cookie_how[how_indx] = 12;
1874 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1875 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1877 /* notify upper layer */
1878 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1879 atomic_add_int(&stcb->asoc.refcnt, 1);
1880 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
1881 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1882 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
1883 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1885 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1886 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1887 } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1888 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1890 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1891 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1892 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1893 stcb->sctp_ep, stcb, asoc->primary_destination);
1895 } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
1896 /* move to OPEN state, if not in SHUTDOWN_SENT */
1897 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1899 asoc->pre_open_streams =
1900 ntohs(initack_cp->init.num_outbound_streams);
1901 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1902 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1903 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1905 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1907 asoc->str_reset_seq_in = asoc->init_seq_number;
1909 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1910 if (asoc->mapping_array) {
1911 memset(asoc->mapping_array, 0,
1912 asoc->mapping_array_size);
1914 if (asoc->nr_mapping_array) {
1915 memset(asoc->nr_mapping_array, 0,
1916 asoc->mapping_array_size);
1918 SCTP_TCB_UNLOCK(stcb);
1919 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1920 so = SCTP_INP_SO(stcb->sctp_ep);
1921 SCTP_SOCKET_LOCK(so, 1);
1923 SCTP_INP_INFO_WLOCK();
1924 SCTP_INP_WLOCK(stcb->sctp_ep);
1925 SCTP_TCB_LOCK(stcb);
1926 atomic_add_int(&stcb->asoc.refcnt, -1);
1927 /* send up all the data */
1928 SCTP_TCB_SEND_LOCK(stcb);
1930 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1931 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1932 stcb->asoc.strmout[i].chunks_on_queues = 0;
1933 stcb->asoc.strmout[i].stream_no = i;
1934 stcb->asoc.strmout[i].next_sequence_send = 0;
1935 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1937 /* process the INIT-ACK info (my info) */
1938 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1939 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1941 /* pull from vtag hash */
1942 LIST_REMOVE(stcb, sctp_asocs);
1943 /* re-insert to new vtag position */
1944 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1945 SCTP_BASE_INFO(hashasocmark))];
1947 * put it in the bucket in the vtag hash of assoc's for the
1950 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1952 SCTP_TCB_SEND_UNLOCK(stcb);
1953 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1954 SCTP_INP_INFO_WUNLOCK();
1955 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1956 SCTP_SOCKET_UNLOCK(so, 1);
1958 asoc->total_flight = 0;
1959 asoc->total_flight_count = 0;
1960 /* process the INIT info (peer's info) */
1961 retval = sctp_process_init(init_cp, stcb);
1963 if (how_indx < sizeof(asoc->cookie_how))
1964 asoc->cookie_how[how_indx] = 13;
1969 * since we did not send a HB make sure we don't double
1972 net->hb_responded = 1;
1974 if (sctp_load_addresses_from_init(stcb, m,
1975 init_offset + sizeof(struct sctp_init_chunk),
1976 initack_offset, src, dst, init_src)) {
1977 if (how_indx < sizeof(asoc->cookie_how))
1978 asoc->cookie_how[how_indx] = 14;
1982 /* respond with a COOKIE-ACK */
1983 sctp_stop_all_cookie_timers(stcb);
1984 sctp_toss_old_cookies(stcb, asoc);
1985 sctp_send_cookie_ack(stcb);
1986 if (how_indx < sizeof(asoc->cookie_how))
1987 asoc->cookie_how[how_indx] = 15;
1991 if (how_indx < sizeof(asoc->cookie_how))
1992 asoc->cookie_how[how_indx] = 16;
1993 /* all other cases... */
1999 * handle a state cookie for a new association m: input packet mbuf chain--
2000 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2001 * and the cookie signature does not exist offset: offset into mbuf to the
2002 * cookie-echo chunk length: length of the cookie chunk to: where the init
2003 * was from returns a new TCB
2005 static struct sctp_tcb *
2006 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2007 struct sockaddr *src, struct sockaddr *dst,
2008 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2009 struct sctp_inpcb *inp, struct sctp_nets **netp,
2010 struct sockaddr *init_src, int *notification,
2011 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2012 uint8_t use_mflowid, uint32_t mflowid,
2013 uint32_t vrf_id, uint16_t port)
2015 struct sctp_tcb *stcb;
2016 struct sctp_init_chunk *init_cp, init_buf;
2017 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2018 struct sockaddr_storage sa_store;
2019 struct sockaddr *initack_src = (struct sockaddr *)&sa_store;
2020 struct sctp_association *asoc;
2021 int init_offset, initack_offset, initack_limit;
2024 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2027 struct sockaddr_in *sin;
2031 struct sockaddr_in6 *sin6;
2034 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2037 so = SCTP_INP_SO(inp);
2041 * find and validate the INIT chunk in the cookie (peer's info) the
2042 * INIT should start after the cookie-echo header struct (chunk
2043 * header, state cookie header struct)
2045 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2046 init_cp = (struct sctp_init_chunk *)
2047 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2048 (uint8_t *) & init_buf);
2049 if (init_cp == NULL) {
2050 /* could not pull a INIT chunk in cookie */
2051 SCTPDBG(SCTP_DEBUG_INPUT1,
2052 "process_cookie_new: could not pull INIT chunk hdr\n");
2055 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2056 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2059 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2061 * find and validate the INIT-ACK chunk in the cookie (my info) the
2062 * INIT-ACK follows the INIT chunk
2064 initack_cp = (struct sctp_init_ack_chunk *)
2065 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2066 (uint8_t *) & initack_buf);
2067 if (initack_cp == NULL) {
2068 /* could not pull INIT-ACK chunk in cookie */
2069 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2072 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2076 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2077 * "initack_limit" value. This is because the chk_length field
2078 * includes the length of the cookie, but the cookie is omitted when
2079 * the INIT and INIT_ACK are tacked onto the cookie...
2081 initack_limit = offset + cookie_len;
2084 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2089 * Here we do a trick, we set in NULL for the proc/thread argument.
2090 * We do this since in effect we only use the p argument when the
2091 * socket is unbound and we must do an implicit bind. Since we are
2092 * getting a cookie, we cannot be unbound.
2094 stcb = sctp_aloc_assoc(inp, init_src, &error,
2095 ntohl(initack_cp->init.initiate_tag), vrf_id,
2096 (struct thread *)NULL
2099 struct mbuf *op_err;
2101 /* memory problem? */
2102 SCTPDBG(SCTP_DEBUG_INPUT1,
2103 "process_cookie_new: no room for another TCB!\n");
2104 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2105 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2106 src, dst, sh, op_err,
2107 use_mflowid, mflowid,
2111 /* get the correct sctp_nets */
2113 *netp = sctp_findnet(stcb, init_src);
2116 /* get scope variables out of cookie */
2117 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2118 asoc->scope.site_scope = cookie->site_scope;
2119 asoc->scope.local_scope = cookie->local_scope;
2120 asoc->scope.loopback_scope = cookie->loopback_scope;
2122 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2123 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2124 struct mbuf *op_err;
2127 * Houston we have a problem. The EP changed while the
2128 * cookie was in flight. Only recourse is to abort the
2131 atomic_add_int(&stcb->asoc.refcnt, 1);
2132 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2133 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2134 src, dst, sh, op_err,
2135 use_mflowid, mflowid,
2137 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2138 SCTP_TCB_UNLOCK(stcb);
2139 SCTP_SOCKET_LOCK(so, 1);
2140 SCTP_TCB_LOCK(stcb);
2142 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2143 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
2144 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2145 SCTP_SOCKET_UNLOCK(so, 1);
2147 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2150 /* process the INIT-ACK info (my info) */
2151 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2152 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2153 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2154 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2155 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2156 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2157 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2158 asoc->str_reset_seq_in = asoc->init_seq_number;
2160 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2162 /* process the INIT info (peer's info) */
2164 retval = sctp_process_init(init_cp, stcb);
2168 atomic_add_int(&stcb->asoc.refcnt, 1);
2169 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2170 SCTP_TCB_UNLOCK(stcb);
2171 SCTP_SOCKET_LOCK(so, 1);
2172 SCTP_TCB_LOCK(stcb);
2174 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
2175 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2176 SCTP_SOCKET_UNLOCK(so, 1);
2178 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2181 /* load all addresses */
2182 if (sctp_load_addresses_from_init(stcb, m,
2183 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2184 src, dst, init_src)) {
2185 atomic_add_int(&stcb->asoc.refcnt, 1);
2186 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2187 SCTP_TCB_UNLOCK(stcb);
2188 SCTP_SOCKET_LOCK(so, 1);
2189 SCTP_TCB_LOCK(stcb);
2191 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
2192 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2193 SCTP_SOCKET_UNLOCK(so, 1);
2195 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2199 * verify any preceding AUTH chunk that was skipped
2201 /* pull the local authentication parameters from the cookie/init-ack */
2202 sctp_auth_get_cookie_params(stcb, m,
2203 initack_offset + sizeof(struct sctp_init_ack_chunk),
2204 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2206 struct sctp_auth_chunk *auth;
2208 auth = (struct sctp_auth_chunk *)
2209 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2210 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2211 /* auth HMAC failed, dump the assoc and packet */
2212 SCTPDBG(SCTP_DEBUG_AUTH1,
2213 "COOKIE-ECHO: AUTH failed\n");
2214 atomic_add_int(&stcb->asoc.refcnt, 1);
2215 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2216 SCTP_TCB_UNLOCK(stcb);
2217 SCTP_SOCKET_LOCK(so, 1);
2218 SCTP_TCB_LOCK(stcb);
2220 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2221 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2222 SCTP_SOCKET_UNLOCK(so, 1);
2224 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2227 /* remaining chunks checked... good to go */
2228 stcb->asoc.authenticated = 1;
2231 /* update current state */
2232 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2233 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2234 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2235 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2236 stcb->sctp_ep, stcb, asoc->primary_destination);
2238 sctp_stop_all_cookie_timers(stcb);
2239 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2240 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2243 * if we're doing ASCONFs, check to see if we have any new local
2244 * addresses that need to get added to the peer (eg. addresses
2245 * changed while cookie echo in flight). This needs to be done
2246 * after we go to the OPEN state to do the correct asconf
2247 * processing. else, make sure we have the correct addresses in our
2251 /* warning, we re-use sin, sin6, sa_store here! */
2252 /* pull in local_address (our "from" address) */
2253 switch (cookie->laddr_type) {
2255 case SCTP_IPV4_ADDRESS:
2256 /* source addr is IPv4 */
2257 sin = (struct sockaddr_in *)initack_src;
2258 memset(sin, 0, sizeof(*sin));
2259 sin->sin_family = AF_INET;
2260 sin->sin_len = sizeof(struct sockaddr_in);
2261 sin->sin_addr.s_addr = cookie->laddress[0];
2265 case SCTP_IPV6_ADDRESS:
2266 /* source addr is IPv6 */
2267 sin6 = (struct sockaddr_in6 *)initack_src;
2268 memset(sin6, 0, sizeof(*sin6));
2269 sin6->sin6_family = AF_INET6;
2270 sin6->sin6_len = sizeof(struct sockaddr_in6);
2271 sin6->sin6_scope_id = cookie->scope_id;
2272 memcpy(&sin6->sin6_addr, cookie->laddress,
2273 sizeof(sin6->sin6_addr));
2277 atomic_add_int(&stcb->asoc.refcnt, 1);
2278 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2279 SCTP_TCB_UNLOCK(stcb);
2280 SCTP_SOCKET_LOCK(so, 1);
2281 SCTP_TCB_LOCK(stcb);
2283 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2284 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2285 SCTP_SOCKET_UNLOCK(so, 1);
2287 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2291 /* set up to notify upper layer */
2292 *notification = SCTP_NOTIFY_ASSOC_UP;
2293 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2294 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2295 (inp->sctp_socket->so_qlimit == 0)) {
2297 * This is an endpoint that called connect() how it got a
2298 * cookie that is NEW is a bit of a mystery. It must be that
2299 * the INIT was sent, but before it got there.. a complete
2300 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2301 * should have went to the other code.. not here.. oh well..
2302 * a bit of protection is worth having..
2304 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2305 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2306 atomic_add_int(&stcb->asoc.refcnt, 1);
2307 SCTP_TCB_UNLOCK(stcb);
2308 SCTP_SOCKET_LOCK(so, 1);
2309 SCTP_TCB_LOCK(stcb);
2310 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2311 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2312 SCTP_SOCKET_UNLOCK(so, 1);
2316 soisconnected(stcb->sctp_socket);
2317 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2318 SCTP_SOCKET_UNLOCK(so, 1);
2320 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2321 (inp->sctp_socket->so_qlimit)) {
2323 * We don't want to do anything with this one. Since it is
2324 * the listening guy. The timer will get started for
2325 * accepted connections in the caller.
2329 /* since we did not send a HB make sure we don't double things */
2330 if ((netp) && (*netp))
2331 (*netp)->hb_responded = 1;
2333 if (stcb->asoc.sctp_autoclose_ticks &&
2334 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2335 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2337 /* calculate the RTT */
2338 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2339 if ((netp) && (*netp)) {
2340 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2341 &cookie->time_entered, sctp_align_unsafe_makecopy,
2342 SCTP_RTT_FROM_NON_DATA);
2344 /* respond with a COOKIE-ACK */
2345 sctp_send_cookie_ack(stcb);
2348 * check the address lists for any ASCONFs that need to be sent
2349 * AFTER the cookie-ack is sent
2351 sctp_check_address_list(stcb, m,
2352 initack_offset + sizeof(struct sctp_init_ack_chunk),
2353 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2354 initack_src, cookie->local_scope, cookie->site_scope,
2355 cookie->ipv4_scope, cookie->loopback_scope);
2362 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2363 * we NEED to make sure we are not already using the vtag. If so we
2364 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2365 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2366 SCTP_BASE_INFO(hashasocmark))];
2367 LIST_FOREACH(stcb, head, sctp_asocs) {
2368 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2369 -- SEND ABORT - TRY AGAIN --
2375 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2376 * existing (non-NULL) TCB
2378 static struct mbuf *
2379 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2380 struct sockaddr *src, struct sockaddr *dst,
2381 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2382 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2383 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2384 struct sctp_tcb **locked_tcb,
2385 uint8_t use_mflowid, uint32_t mflowid,
2386 uint32_t vrf_id, uint16_t port)
2388 struct sctp_state_cookie *cookie;
2389 struct sctp_tcb *l_stcb = *stcb;
2390 struct sctp_inpcb *l_inp;
2391 struct sockaddr *to;
2392 struct sctp_pcb *ep;
2394 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2396 uint8_t cookie_ok = 0;
2397 unsigned int sig_offset, cookie_offset;
2398 unsigned int cookie_len;
2400 struct timeval time_expires;
2401 int notification = 0;
2402 struct sctp_nets *netl;
2403 int had_a_existing_tcb = 0;
2404 int send_int_conf = 0;
2407 struct sockaddr_in sin;
2411 struct sockaddr_in6 sin6;
2415 SCTPDBG(SCTP_DEBUG_INPUT2,
2416 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2418 if (inp_p == NULL) {
2421 cookie = &cp->cookie;
2422 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2423 cookie_len = ntohs(cp->ch.chunk_length);
2425 if ((cookie->peerport != sh->src_port) &&
2426 (cookie->myport != sh->dest_port) &&
2427 (cookie->my_vtag != sh->v_tag)) {
2429 * invalid ports or bad tag. Note that we always leave the
2430 * v_tag in the header in network order and when we stored
2431 * it in the my_vtag slot we also left it in network order.
2432 * This maintains the match even though it may be in the
2433 * opposite byte order of the machine :->
2437 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2438 sizeof(struct sctp_init_chunk) +
2439 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2440 /* cookie too small */
2444 * split off the signature into its own mbuf (since it should not be
2445 * calculated in the sctp_hmac_m() call).
2447 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2448 m_sig = m_split(m, sig_offset, M_NOWAIT);
2449 if (m_sig == NULL) {
2450 /* out of memory or ?? */
2453 #ifdef SCTP_MBUF_LOGGING
2454 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2457 for (mat = m_sig; mat; mat = SCTP_BUF_NEXT(mat)) {
2458 if (SCTP_BUF_IS_EXTENDED(mat)) {
2459 sctp_log_mb(mat, SCTP_MBUF_SPLIT);
2466 * compute the signature/digest for the cookie
2468 ep = &(*inp_p)->sctp_ep;
2471 SCTP_TCB_UNLOCK(l_stcb);
2473 SCTP_INP_RLOCK(l_inp);
2475 SCTP_TCB_LOCK(l_stcb);
2477 /* which cookie is it? */
2478 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2479 (ep->current_secret_number != ep->last_secret_number)) {
2480 /* it's the old cookie */
2481 (void)sctp_hmac_m(SCTP_HMAC,
2482 (uint8_t *) ep->secret_key[(int)ep->last_secret_number],
2483 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2485 /* it's the current cookie */
2486 (void)sctp_hmac_m(SCTP_HMAC,
2487 (uint8_t *) ep->secret_key[(int)ep->current_secret_number],
2488 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2490 /* get the signature */
2491 SCTP_INP_RUNLOCK(l_inp);
2492 sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig);
2494 /* couldn't find signature */
2495 sctp_m_freem(m_sig);
2498 /* compare the received digest with the computed digest */
2499 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2500 /* try the old cookie? */
2501 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2502 (ep->current_secret_number != ep->last_secret_number)) {
2503 /* compute digest with old */
2504 (void)sctp_hmac_m(SCTP_HMAC,
2505 (uint8_t *) ep->secret_key[(int)ep->last_secret_number],
2506 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2508 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2516 * Now before we continue we must reconstruct our mbuf so that
2517 * normal processing of any other chunks will work.
2523 while (SCTP_BUF_NEXT(m_at) != NULL) {
2524 m_at = SCTP_BUF_NEXT(m_at);
2526 SCTP_BUF_NEXT(m_at) = m_sig;
2529 if (cookie_ok == 0) {
2530 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2531 SCTPDBG(SCTP_DEBUG_INPUT2,
2532 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2533 (uint32_t) offset, cookie_offset, sig_offset);
2537 * check the cookie timestamps to be sure it's not stale
2539 (void)SCTP_GETTIME_TIMEVAL(&now);
2540 /* Expire time is in Ticks, so we convert to seconds */
2541 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2542 time_expires.tv_usec = cookie->time_entered.tv_usec;
2544 * TODO sctp_constants.h needs alternative time macros when _KERNEL
2547 if (timevalcmp(&now, &time_expires, >)) {
2548 /* cookie is stale! */
2549 struct mbuf *op_err;
2550 struct sctp_stale_cookie_msg *scm;
2553 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg),
2554 0, M_NOWAIT, 1, MT_DATA);
2555 if (op_err == NULL) {
2560 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg);
2561 scm = mtod(op_err, struct sctp_stale_cookie_msg *);
2562 scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE);
2563 scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) +
2564 (sizeof(uint32_t))));
2565 /* seconds to usec */
2566 tim = (now.tv_sec - time_expires.tv_sec) * 1000000;
2569 tim = now.tv_usec - cookie->time_entered.tv_usec;
2570 scm->time_usec = htonl(tim);
2571 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2572 use_mflowid, mflowid,
2577 * Now we must see with the lookup address if we have an existing
2578 * asoc. This will only happen if we were in the COOKIE-WAIT state
2579 * and a INIT collided with us and somewhere the peer sent the
2580 * cookie on another address besides the single address our assoc
2581 * had for him. In this case we will have one of the tie-tags set at
2582 * least AND the address field in the cookie can be used to look it
2586 switch (cookie->addr_type) {
2588 case SCTP_IPV6_ADDRESS:
2589 memset(&sin6, 0, sizeof(sin6));
2590 sin6.sin6_family = AF_INET6;
2591 sin6.sin6_len = sizeof(sin6);
2592 sin6.sin6_port = sh->src_port;
2593 sin6.sin6_scope_id = cookie->scope_id;
2594 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2595 sizeof(sin6.sin6_addr.s6_addr));
2596 to = (struct sockaddr *)&sin6;
2600 case SCTP_IPV4_ADDRESS:
2601 memset(&sin, 0, sizeof(sin));
2602 sin.sin_family = AF_INET;
2603 sin.sin_len = sizeof(sin);
2604 sin.sin_port = sh->src_port;
2605 sin.sin_addr.s_addr = cookie->address[0];
2606 to = (struct sockaddr *)&sin;
2610 /* This should not happen */
2613 if ((*stcb == NULL) && to) {
2614 /* Yep, lets check */
2615 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2616 if (*stcb == NULL) {
2618 * We should have only got back the same inp. If we
2619 * got back a different ep we have a problem. The
2620 * original findep got back l_inp and now
2622 if (l_inp != *inp_p) {
2623 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2626 if (*locked_tcb == NULL) {
2628 * In this case we found the assoc only
2629 * after we locked the create lock. This
2630 * means we are in a colliding case and we
2631 * must make sure that we unlock the tcb if
2632 * its one of the cases where we throw away
2633 * the incoming packets.
2635 *locked_tcb = *stcb;
2638 * We must also increment the inp ref count
2639 * since the ref_count flags was set when we
2640 * did not find the TCB, now we found it
2641 * which reduces the refcount.. we must
2642 * raise it back out to balance it all :-)
2644 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2645 if ((*stcb)->sctp_ep != l_inp) {
2646 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2647 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2655 cookie_len -= SCTP_SIGNATURE_SIZE;
2656 if (*stcb == NULL) {
2657 /* this is the "normal" case... get a new TCB */
2658 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2659 cookie, cookie_len, *inp_p,
2660 netp, to, ¬ification,
2661 auth_skipped, auth_offset, auth_len,
2662 use_mflowid, mflowid,
2665 /* this is abnormal... cookie-echo on existing TCB */
2666 had_a_existing_tcb = 1;
2667 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2669 cookie, cookie_len, *inp_p, *stcb, netp, to,
2670 ¬ification, auth_skipped, auth_offset, auth_len,
2671 use_mflowid, mflowid,
2675 if (*stcb == NULL) {
2676 /* still no TCB... must be bad cookie-echo */
2679 if ((*netp != NULL) && (use_mflowid != 0)) {
2680 (*netp)->flowid = mflowid;
2682 (*netp)->flowidset = 1;
2686 * Ok, we built an association so confirm the address we sent the
2689 netl = sctp_findnet(*stcb, to);
2691 * This code should in theory NOT run but
2694 /* TSNH! Huh, why do I need to add this address here? */
2695 if (sctp_add_remote_addr(*stcb, to, NULL, SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2698 netl = sctp_findnet(*stcb, to);
2701 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2702 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2703 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2708 sctp_start_net_timers(*stcb);
2709 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2710 if (!had_a_existing_tcb ||
2711 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2713 * If we have a NEW cookie or the connect never
2714 * reached the connected state during collision we
2715 * must do the TCP accept thing.
2717 struct socket *so, *oso;
2718 struct sctp_inpcb *inp;
2720 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2722 * For a restart we will keep the same
2723 * socket, no need to do anything. I THINK!!
2725 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2726 if (send_int_conf) {
2727 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2728 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2732 oso = (*inp_p)->sctp_socket;
2733 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2734 SCTP_TCB_UNLOCK((*stcb));
2735 CURVNET_SET(oso->so_vnet);
2736 so = sonewconn(oso, 0
2739 SCTP_TCB_LOCK((*stcb));
2740 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2743 struct mbuf *op_err;
2745 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2746 struct socket *pcb_so;
2749 /* Too many sockets */
2750 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2751 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2752 sctp_abort_association(*inp_p, NULL, m, iphlen,
2753 src, dst, sh, op_err,
2754 use_mflowid, mflowid,
2756 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2757 pcb_so = SCTP_INP_SO(*inp_p);
2758 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2759 SCTP_TCB_UNLOCK((*stcb));
2760 SCTP_SOCKET_LOCK(pcb_so, 1);
2761 SCTP_TCB_LOCK((*stcb));
2762 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2764 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2765 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2766 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2770 inp = (struct sctp_inpcb *)so->so_pcb;
2771 SCTP_INP_INCR_REF(inp);
2773 * We add the unbound flag here so that if we get an
2774 * soabort() before we get the move_pcb done, we
2775 * will properly cleanup.
2777 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2778 SCTP_PCB_FLAGS_CONNECTED |
2779 SCTP_PCB_FLAGS_IN_TCPPOOL |
2780 SCTP_PCB_FLAGS_UNBOUND |
2781 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2782 SCTP_PCB_FLAGS_DONT_WAKE);
2783 inp->sctp_features = (*inp_p)->sctp_features;
2784 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2785 inp->sctp_socket = so;
2786 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2787 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2788 inp->ecn_supported = (*inp_p)->ecn_supported;
2789 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2790 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2791 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2792 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2793 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2794 inp->sctp_context = (*inp_p)->sctp_context;
2795 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2796 inp->inp_starting_point_for_iterator = NULL;
2798 * copy in the authentication parameters from the
2801 if (inp->sctp_ep.local_hmacs)
2802 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2803 inp->sctp_ep.local_hmacs =
2804 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2805 if (inp->sctp_ep.local_auth_chunks)
2806 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2807 inp->sctp_ep.local_auth_chunks =
2808 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2811 * Now we must move it from one hash table to
2812 * another and get the tcb in the right place.
2816 * This is where the one-2-one socket is put into
2817 * the accept state waiting for the accept!
2820 (*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
2822 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2824 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2825 SCTP_TCB_UNLOCK((*stcb));
2827 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2829 SCTP_TCB_LOCK((*stcb));
2830 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2834 * now we must check to see if we were aborted while
2835 * the move was going on and the lock/unlock
2838 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2840 * yep it was, we leave the assoc attached
2841 * to the socket since the sctp_inpcb_free()
2842 * call will send an abort for us.
2844 SCTP_INP_DECR_REF(inp);
2847 SCTP_INP_DECR_REF(inp);
2848 /* Switch over to the new guy */
2850 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2851 if (send_int_conf) {
2852 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2853 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2856 * Pull it from the incomplete queue and wake the
2859 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2860 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2861 SCTP_TCB_UNLOCK((*stcb));
2862 SCTP_SOCKET_LOCK(so, 1);
2865 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2866 SCTP_TCB_LOCK((*stcb));
2867 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2868 SCTP_SOCKET_UNLOCK(so, 1);
2874 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2876 if (send_int_conf) {
2877 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2878 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2884 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2885 struct sctp_tcb *stcb, struct sctp_nets *net)
2887 /* cp must not be used, others call this without a c-ack :-) */
2888 struct sctp_association *asoc;
2890 SCTPDBG(SCTP_DEBUG_INPUT2,
2891 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2897 sctp_stop_all_cookie_timers(stcb);
2898 /* process according to association state */
2899 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
2900 /* state change only needed when I am in right state */
2901 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2902 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2903 sctp_start_net_timers(stcb);
2904 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2905 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2906 stcb->sctp_ep, stcb, asoc->primary_destination);
2910 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2911 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2912 if (asoc->overall_error_count == 0) {
2913 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2914 &asoc->time_entered, sctp_align_safe_nocopy,
2915 SCTP_RTT_FROM_NON_DATA);
2917 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2918 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2919 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2920 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2921 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2925 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2926 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2927 so = SCTP_INP_SO(stcb->sctp_ep);
2928 atomic_add_int(&stcb->asoc.refcnt, 1);
2929 SCTP_TCB_UNLOCK(stcb);
2930 SCTP_SOCKET_LOCK(so, 1);
2931 SCTP_TCB_LOCK(stcb);
2932 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2934 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2935 soisconnected(stcb->sctp_socket);
2937 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2938 SCTP_SOCKET_UNLOCK(so, 1);
2942 * since we did not send a HB make sure we don't double
2945 net->hb_responded = 1;
2947 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2949 * We don't need to do the asconf thing, nor hb or
2950 * autoclose if the socket is closed.
2954 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2958 if (stcb->asoc.sctp_autoclose_ticks &&
2959 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2960 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2961 stcb->sctp_ep, stcb, NULL);
2964 * send ASCONF if parameters are pending and ASCONFs are
2965 * allowed (eg. addresses changed when init/cookie echo were
2968 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2969 (stcb->asoc.peer_supports_asconf) &&
2970 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2971 #ifdef SCTP_TIMER_BASED_ASCONF
2972 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2973 stcb->sctp_ep, stcb,
2974 stcb->asoc.primary_destination);
2976 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2977 SCTP_ADDR_NOT_LOCKED);
2982 /* Toss the cookie if I can */
2983 sctp_toss_old_cookies(stcb, asoc);
2984 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
2985 /* Restart the timer if we have pending data */
2986 struct sctp_tmit_chunk *chk;
2988 chk = TAILQ_FIRST(&asoc->sent_queue);
2989 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2994 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2995 struct sctp_tcb *stcb)
2997 struct sctp_nets *net;
2998 struct sctp_tmit_chunk *lchk;
2999 struct sctp_ecne_chunk bkup;
3000 uint8_t override_bit;
3001 uint32_t tsn, window_data_tsn;
3003 unsigned int pkt_cnt;
3005 len = ntohs(cp->ch.chunk_length);
3006 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3007 (len != sizeof(struct old_sctp_ecne_chunk))) {
3010 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3011 /* Its the old format */
3012 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3013 bkup.num_pkts_since_cwr = htonl(1);
3016 SCTP_STAT_INCR(sctps_recvecne);
3017 tsn = ntohl(cp->tsn);
3018 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3019 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3021 window_data_tsn = stcb->asoc.sending_seq - 1;
3023 window_data_tsn = lchk->rec.data.TSN_seq;
3026 /* Find where it was sent to if possible. */
3028 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3029 if (lchk->rec.data.TSN_seq == tsn) {
3031 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3034 if (SCTP_TSN_GT(lchk->rec.data.TSN_seq, tsn)) {
3040 * What to do. A previous send of a CWR was possibly lost.
3041 * See how old it is, we may have it marked on the actual
3044 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3045 if (tsn == net->last_cwr_tsn) {
3046 /* Found him, send it off */
3052 * If we reach here, we need to send a special CWR
3053 * that says hey, we did this a long time ago and
3054 * you lost the response.
3056 net = TAILQ_FIRST(&stcb->asoc.nets);
3061 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3068 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3069 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3071 * JRS - Use the congestion control given in the pluggable
3074 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3076 * We reduce once every RTT. So we will only lower cwnd at
3077 * the next sending seq i.e. the window_data_tsn
3079 net->cwr_window_tsn = window_data_tsn;
3080 net->ecn_ce_pkt_cnt += pkt_cnt;
3081 net->lost_cnt = pkt_cnt;
3082 net->last_cwr_tsn = tsn;
3084 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3085 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3086 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3088 * Another loss in the same window update how many
3089 * marks/packets lost we have had.
3093 if (pkt_cnt > net->lost_cnt) {
3094 /* Should be the case */
3095 cnt = (pkt_cnt - net->lost_cnt);
3096 net->ecn_ce_pkt_cnt += cnt;
3098 net->lost_cnt = pkt_cnt;
3099 net->last_cwr_tsn = tsn;
3101 * Most CC functions will ignore this call, since we
3102 * are in-window yet of the initial CE the peer saw.
3104 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3108 * We always send a CWR this way if our previous one was lost our
3109 * peer will get an update, or if it is not time again to reduce we
3110 * still get the cwr to the peer. Note we set the override when we
3111 * could not find the TSN on the chunk or the destination network.
3113 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3117 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3120 * Here we get a CWR from the peer. We must look in the outqueue and
3121 * make sure that we have a covered ECNE in the control chunk part.
3124 struct sctp_tmit_chunk *chk;
3125 struct sctp_ecne_chunk *ecne;
3129 cwr_tsn = ntohl(cp->tsn);
3131 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3132 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
3133 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3136 if ((override == 0) && (chk->whoTo != net)) {
3137 /* Must be from the right src unless override is set */
3140 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3141 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3142 /* this covers this ECNE, we can remove it */
3143 stcb->asoc.ecn_echo_cnt_onq--;
3144 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3147 sctp_m_freem(chk->data);
3150 stcb->asoc.ctrl_queue_cnt--;
3151 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3152 if (override == 0) {
3160 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3161 struct sctp_tcb *stcb, struct sctp_nets *net)
3163 struct sctp_association *asoc;
3165 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3170 SCTPDBG(SCTP_DEBUG_INPUT2,
3171 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3176 /* process according to association state */
3177 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3178 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3179 SCTPDBG(SCTP_DEBUG_INPUT2,
3180 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3181 SCTP_TCB_UNLOCK(stcb);
3184 /* notify upper layer protocol */
3185 if (stcb->sctp_socket) {
3186 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3189 if (!TAILQ_EMPTY(&asoc->send_queue) ||
3190 !TAILQ_EMPTY(&asoc->sent_queue) ||
3191 !stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
3192 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3195 /* stop the timer */
3196 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
3197 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3199 SCTPDBG(SCTP_DEBUG_INPUT2,
3200 "sctp_handle_shutdown_complete: calls free-asoc\n");
3201 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3202 so = SCTP_INP_SO(stcb->sctp_ep);
3203 atomic_add_int(&stcb->asoc.refcnt, 1);
3204 SCTP_TCB_UNLOCK(stcb);
3205 SCTP_SOCKET_LOCK(so, 1);
3206 SCTP_TCB_LOCK(stcb);
3207 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3209 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
3210 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3211 SCTP_SOCKET_UNLOCK(so, 1);
3217 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3218 struct sctp_nets *net, uint8_t flg)
3220 switch (desc->chunk_type) {
3222 /* find the tsn to resend (possibly */
3225 struct sctp_tmit_chunk *tp1;
3227 tsn = ntohl(desc->tsn_ifany);
3228 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3229 if (tp1->rec.data.TSN_seq == tsn) {
3233 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, tsn)) {
3241 * Do it the other way , aka without paying
3242 * attention to queue seq order.
3244 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3245 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3246 if (tp1->rec.data.TSN_seq == tsn) {
3253 SCTP_STAT_INCR(sctps_pdrptsnnf);
3255 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3258 if (((flg & SCTP_BADCRC) == 0) &&
3259 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3262 if ((stcb->asoc.peers_rwnd == 0) &&
3263 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3264 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3267 if (stcb->asoc.peers_rwnd == 0 &&
3268 (flg & SCTP_FROM_MIDDLE_BOX)) {
3269 SCTP_STAT_INCR(sctps_pdrpdizrw);
3272 ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+
3273 sizeof(struct sctp_data_chunk));
3277 for (iii = 0; iii < sizeof(desc->data_bytes);
3279 if (ddp[iii] != desc->data_bytes[iii]) {
3280 SCTP_STAT_INCR(sctps_pdrpbadd);
3288 * this guy had a RTO calculation
3289 * pending on it, cancel it
3291 if (tp1->whoTo->rto_needed == 0) {
3292 tp1->whoTo->rto_needed = 1;
3296 SCTP_STAT_INCR(sctps_pdrpmark);
3297 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3298 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3300 * mark it as if we were doing a FR, since
3301 * we will be getting gap ack reports behind
3302 * the info from the router.
3304 tp1->rec.data.doing_fast_retransmit = 1;
3306 * mark the tsn with what sequences can
3309 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3310 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3312 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
3315 /* restart the timer */
3316 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3317 stcb, tp1->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3318 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3321 /* fix counts and things */
3322 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3323 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3324 tp1->whoTo->flight_size,
3327 tp1->rec.data.TSN_seq);
3329 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3330 sctp_flight_size_decrease(tp1);
3331 sctp_total_flight_decrease(stcb, tp1);
3333 tp1->sent = SCTP_DATAGRAM_RESEND;
3339 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3340 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3343 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3345 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3348 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3349 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3350 audit, stcb->asoc.sent_queue_retran_cnt);
3351 #ifndef SCTP_AUDITING_ENABLED
3352 stcb->asoc.sent_queue_retran_cnt = audit;
3360 struct sctp_tmit_chunk *asconf;
3362 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3364 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3369 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3370 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3371 asconf->sent = SCTP_DATAGRAM_RESEND;
3372 asconf->snd_count--;
3376 case SCTP_INITIATION:
3377 /* resend the INIT */
3378 stcb->asoc.dropped_special_cnt++;
3379 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3381 * If we can get it in, in a few attempts we do
3382 * this, otherwise we let the timer fire.
3384 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3385 stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3386 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3389 case SCTP_SELECTIVE_ACK:
3390 case SCTP_NR_SELECTIVE_ACK:
3391 /* resend the sack */
3392 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3394 case SCTP_HEARTBEAT_REQUEST:
3395 /* resend a demand HB */
3396 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3398 * Only retransmit if we KNOW we wont destroy the
3401 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3405 sctp_send_shutdown(stcb, net);
3407 case SCTP_SHUTDOWN_ACK:
3408 sctp_send_shutdown_ack(stcb, net);
3410 case SCTP_COOKIE_ECHO:
3412 struct sctp_tmit_chunk *cookie;
3415 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3417 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3422 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3423 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3424 cookie->sent = SCTP_DATAGRAM_RESEND;
3425 sctp_stop_all_cookie_timers(stcb);
3429 case SCTP_COOKIE_ACK:
3430 sctp_send_cookie_ack(stcb);
3432 case SCTP_ASCONF_ACK:
3433 /* resend last asconf ack */
3434 sctp_send_asconf_ack(stcb);
3436 case SCTP_FORWARD_CUM_TSN:
3437 send_forward_tsn(stcb, &stcb->asoc);
3439 /* can't do anything with these */
3440 case SCTP_PACKET_DROPPED:
3441 case SCTP_INITIATION_ACK: /* this should not happen */
3442 case SCTP_HEARTBEAT_ACK:
3443 case SCTP_ABORT_ASSOCIATION:
3444 case SCTP_OPERATION_ERROR:
3445 case SCTP_SHUTDOWN_COMPLETE:
3455 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3461 * We set things to 0xffff since this is the last delivered sequence
3462 * and we will be sending in 0 after the reset.
3465 if (number_entries) {
3466 for (i = 0; i < number_entries; i++) {
3467 temp = ntohs(list[i]);
3468 if (temp >= stcb->asoc.streamincnt) {
3471 stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff;
3475 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3476 stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
3479 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3483 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3488 if (number_entries > 0) {
3489 for (i = 0; i < number_entries; i++) {
3490 temp = ntohs(list[i]);
3491 if (temp >= stcb->asoc.streamoutcnt) {
3492 /* no such stream */
3495 stcb->asoc.strmout[temp].next_sequence_send = 0;
3498 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3499 stcb->asoc.strmout[i].next_sequence_send = 0;
3502 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3506 struct sctp_stream_reset_out_request *
3507 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3509 struct sctp_association *asoc;
3510 struct sctp_chunkhdr *ch;
3511 struct sctp_stream_reset_out_request *r;
3512 struct sctp_tmit_chunk *chk;
3516 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3517 asoc->stream_reset_outstanding = 0;
3520 if (stcb->asoc.str_reset == NULL) {
3521 asoc->stream_reset_outstanding = 0;
3524 chk = stcb->asoc.str_reset;
3525 if (chk->data == NULL) {
3529 /* he wants a copy of the chk pointer */
3532 clen = chk->send_size;
3533 ch = mtod(chk->data, struct sctp_chunkhdr *);
3534 r = (struct sctp_stream_reset_out_request *)(ch + 1);
3535 if (ntohl(r->request_seq) == seq) {
3539 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3540 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3541 /* move to the next one, there can only be a max of two */
3542 r = (struct sctp_stream_reset_out_request *)((caddr_t)r + len);
3543 if (ntohl(r->request_seq) == seq) {
3547 /* that seq is not here */
3552 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3554 struct sctp_association *asoc;
3555 struct sctp_tmit_chunk *chk = stcb->asoc.str_reset;
3557 if (stcb->asoc.str_reset == NULL) {
3562 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3563 TAILQ_REMOVE(&asoc->control_send_queue,
3567 sctp_m_freem(chk->data);
3570 asoc->ctrl_queue_cnt--;
3571 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3572 /* sa_ignore NO_NULL_CHK */
3573 stcb->asoc.str_reset = NULL;
3578 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3579 uint32_t seq, uint32_t action,
3580 struct sctp_stream_reset_response *respin)
3584 struct sctp_association *asoc = &stcb->asoc;
3585 struct sctp_tmit_chunk *chk;
3586 struct sctp_stream_reset_out_request *srparam;
3587 uint32_t number_entries;
3589 if (asoc->stream_reset_outstanding == 0) {
3593 if (seq == stcb->asoc.str_reset_seq_out) {
3594 srparam = sctp_find_stream_reset(stcb, seq, &chk);
3596 stcb->asoc.str_reset_seq_out++;
3597 type = ntohs(srparam->ph.param_type);
3598 lparm_len = ntohs(srparam->ph.param_length);
3599 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3600 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3601 asoc->stream_reset_out_is_outstanding = 0;
3602 if (asoc->stream_reset_outstanding)
3603 asoc->stream_reset_outstanding--;
3604 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3606 sctp_reset_out_streams(stcb, number_entries, srparam->list_of_streams);
3607 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3608 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, srparam->list_of_streams, SCTP_SO_NOT_LOCKED);
3610 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, srparam->list_of_streams, SCTP_SO_NOT_LOCKED);
3612 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3613 /* Answered my request */
3614 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3615 if (asoc->stream_reset_outstanding)
3616 asoc->stream_reset_outstanding--;
3617 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3618 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3619 number_entries, srparam->list_of_streams, SCTP_SO_NOT_LOCKED);
3620 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3621 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3622 number_entries, srparam->list_of_streams, SCTP_SO_NOT_LOCKED);
3624 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3625 /* Ok we now may have more streams */
3628 num_stream = stcb->asoc.strm_pending_add_size;
3629 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3631 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3633 stcb->asoc.strm_pending_add_size = 0;
3634 if (asoc->stream_reset_outstanding)
3635 asoc->stream_reset_outstanding--;
3636 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3637 /* Put the new streams into effect */
3638 stcb->asoc.streamoutcnt += num_stream;
3639 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3640 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3641 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3642 SCTP_STREAM_CHANGE_DENIED);
3644 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3645 SCTP_STREAM_CHANGE_FAILED);
3647 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3648 if (asoc->stream_reset_outstanding)
3649 asoc->stream_reset_outstanding--;
3650 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3651 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3652 SCTP_STREAM_CHANGE_DENIED);
3653 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3654 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3655 SCTP_STREAM_CHANGE_FAILED);
3657 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3659 * a) Adopt the new in tsn.
3661 * c) Adopt the new out-tsn
3663 struct sctp_stream_reset_response_tsn *resp;
3664 struct sctp_forward_tsn_chunk fwdtsn;
3667 if (respin == NULL) {
3671 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3672 resp = (struct sctp_stream_reset_response_tsn *)respin;
3673 asoc->stream_reset_outstanding--;
3674 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3675 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3676 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3677 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3681 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3682 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3683 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3685 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3686 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3687 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3689 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3690 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3692 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3693 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3695 sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
3696 sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
3697 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3698 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3699 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3700 SCTP_ASSOC_RESET_DENIED);
3702 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3703 SCTP_ASSOC_RESET_FAILED);
3706 /* get rid of the request and get the request flags */
3707 if (asoc->stream_reset_outstanding == 0) {
3708 sctp_clean_up_stream_reset(stcb);
3716 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3717 struct sctp_tmit_chunk *chk,
3718 struct sctp_stream_reset_in_request *req, int trunc)
3726 * peer wants me to send a str-reset to him for my outgoing seq's if
3729 struct sctp_association *asoc = &stcb->asoc;
3731 seq = ntohl(req->request_seq);
3732 if (asoc->str_reset_seq_in == seq) {
3733 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3734 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3735 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3737 /* Can't do it, since they exceeded our buffer size */
3738 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3739 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3740 len = ntohs(req->ph.param_length);
3741 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3742 for (i = 0; i < number_entries; i++) {
3743 temp = ntohs(req->list_of_streams[i]);
3744 req->list_of_streams[i] = temp;
3746 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3747 sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams,
3748 asoc->str_reset_seq_out,
3749 seq, (asoc->sending_seq - 1));
3750 asoc->stream_reset_out_is_outstanding = 1;
3751 asoc->str_reset = chk;
3752 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
3753 stcb->asoc.stream_reset_outstanding++;
3755 /* Can't do it, since we have sent one out */
3756 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3758 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3759 asoc->str_reset_seq_in++;
3760 } else if (asoc->str_reset_seq_in - 1 == seq) {
3761 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3762 } else if (asoc->str_reset_seq_in - 2 == seq) {
3763 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3765 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3770 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3771 struct sctp_tmit_chunk *chk,
3772 struct sctp_stream_reset_tsn_request *req)
3774 /* reset all in and out and update the tsn */
3776 * A) reset my str-seq's on in and out. B) Select a receive next,
3777 * and set cum-ack to it. Also process this selected number as a
3778 * fwd-tsn as well. C) set in the response my next sending seq.
3780 struct sctp_forward_tsn_chunk fwdtsn;
3781 struct sctp_association *asoc = &stcb->asoc;
3785 seq = ntohl(req->request_seq);
3786 if (asoc->str_reset_seq_in == seq) {
3787 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3788 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3789 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3791 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3792 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3793 fwdtsn.ch.chunk_flags = 0;
3794 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3795 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3799 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3800 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3801 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3803 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3804 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3805 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3806 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3807 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3808 atomic_add_int(&asoc->sending_seq, 1);
3809 /* save off historical data for retrans */
3810 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3811 asoc->last_sending_seq[0] = asoc->sending_seq;
3812 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3813 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3814 sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
3815 sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
3816 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3817 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3819 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3820 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3821 asoc->str_reset_seq_in++;
3822 } else if (asoc->str_reset_seq_in - 1 == seq) {
3823 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3824 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3825 } else if (asoc->str_reset_seq_in - 2 == seq) {
3826 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3827 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3829 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3835 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3836 struct sctp_tmit_chunk *chk,
3837 struct sctp_stream_reset_out_request *req, int trunc)
3840 int number_entries, len;
3841 struct sctp_association *asoc = &stcb->asoc;
3843 seq = ntohl(req->request_seq);
3845 /* now if its not a duplicate we process it */
3846 if (asoc->str_reset_seq_in == seq) {
3847 len = ntohs(req->ph.param_length);
3848 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3850 * the sender is resetting, handle the list issue.. we must
3851 * a) verify if we can do the reset, if so no problem b) If
3852 * we can't do the reset we must copy the request. c) queue
3853 * it, and setup the data in processor to trigger it off
3854 * when needed and dequeue all the queued data.
3856 tsn = ntohl(req->send_reset_at_tsn);
3858 /* move the reset action back one */
3859 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3860 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3861 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3863 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3864 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3865 /* we can do it now */
3866 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3867 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3870 * we must queue it up and thus wait for the TSN's
3871 * to arrive that are at or before tsn
3873 struct sctp_stream_reset_list *liste;
3876 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3877 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3878 siz, SCTP_M_STRESET);
3879 if (liste == NULL) {
3880 /* gak out of memory */
3881 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3882 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3886 liste->number_entries = number_entries;
3887 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3888 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3889 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3891 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3892 asoc->str_reset_seq_in++;
3893 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3895 * one seq back, just echo back last action since my
3896 * response was lost.
3898 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3899 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3901 * two seq back, just echo back last action since my
3902 * response was lost.
3904 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3906 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3911 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3912 struct sctp_stream_reset_add_strm *str_add)
3915 * Peer is requesting to add more streams. If its within our
3916 * max-streams we will allow it.
3918 uint32_t num_stream, i;
3920 struct sctp_association *asoc = &stcb->asoc;
3921 struct sctp_queued_to_read *ctl, *nctl;
3923 /* Get the number. */
3924 seq = ntohl(str_add->request_seq);
3925 num_stream = ntohs(str_add->number_of_streams);
3926 /* Now what would be the new total? */
3927 if (asoc->str_reset_seq_in == seq) {
3928 num_stream += stcb->asoc.streamincnt;
3929 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3930 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3931 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3932 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3933 (num_stream > 0xffff)) {
3934 /* We must reject it they ask for to many */
3936 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3938 /* Ok, we can do that :-) */
3939 struct sctp_stream_in *oldstrm;
3941 /* save off the old */
3942 oldstrm = stcb->asoc.strmin;
3943 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3944 (num_stream * sizeof(struct sctp_stream_in)),
3946 if (stcb->asoc.strmin == NULL) {
3947 stcb->asoc.strmin = oldstrm;
3950 /* copy off the old data */
3951 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3952 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3953 stcb->asoc.strmin[i].stream_no = i;
3954 stcb->asoc.strmin[i].last_sequence_delivered = oldstrm[i].last_sequence_delivered;
3955 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3956 /* now anything on those queues? */
3957 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next, nctl) {
3958 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next);
3959 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next);
3962 /* Init the new streams */
3963 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3964 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3965 stcb->asoc.strmin[i].stream_no = i;
3966 stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
3967 stcb->asoc.strmin[i].delivery_started = 0;
3969 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3970 /* update the size */
3971 stcb->asoc.streamincnt = num_stream;
3972 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3973 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3975 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3976 asoc->str_reset_seq_in++;
3977 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3979 * one seq back, just echo back last action since my
3980 * response was lost.
3982 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3983 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3985 * two seq back, just echo back last action since my
3986 * response was lost.
3988 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3990 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3996 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3997 struct sctp_stream_reset_add_strm *str_add)
4000 * Peer is requesting to add more streams. If its within our
4001 * max-streams we will allow it.
4003 uint16_t num_stream;
4005 struct sctp_association *asoc = &stcb->asoc;
4007 /* Get the number. */
4008 seq = ntohl(str_add->request_seq);
4009 num_stream = ntohs(str_add->number_of_streams);
4010 /* Now what would be the new total? */
4011 if (asoc->str_reset_seq_in == seq) {
4012 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4013 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4014 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4015 } else if (stcb->asoc.stream_reset_outstanding) {
4016 /* We must reject it we have something pending */
4017 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4019 /* Ok, we can do that :-) */
4022 mychk = stcb->asoc.streamoutcnt;
4023 mychk += num_stream;
4024 if (mychk < 0x10000) {
4025 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4026 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 0, 1, num_stream, 0, 1)) {
4027 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4030 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4033 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4034 asoc->str_reset_seq_in++;
4035 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4037 * one seq back, just echo back last action since my
4038 * response was lost.
4040 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4041 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4043 * two seq back, just echo back last action since my
4044 * response was lost.
4046 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4048 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4053 __attribute__((noinline))
4056 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4057 struct sctp_chunkhdr *ch_req)
4059 int chk_length, param_len, ptype;
4060 struct sctp_paramhdr pstore;
4061 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4065 struct sctp_tmit_chunk *chk;
4066 struct sctp_chunkhdr *ch;
4067 struct sctp_paramhdr *ph;
4071 /* now it may be a reset or a reset-response */
4072 chk_length = ntohs(ch_req->chunk_length);
4074 /* setup for adding the response */
4075 sctp_alloc_a_chunk(stcb, chk);
4079 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4080 chk->rec.chunk_id.can_take_data = 0;
4081 chk->asoc = &stcb->asoc;
4082 chk->no_fr_allowed = 0;
4083 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4084 chk->book_size_scale = 0;
4085 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4086 if (chk->data == NULL) {
4089 sctp_m_freem(chk->data);
4092 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4095 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4097 /* setup chunk parameters */
4098 chk->sent = SCTP_DATAGRAM_UNSENT;
4102 ch = mtod(chk->data, struct sctp_chunkhdr *);
4103 ch->chunk_type = SCTP_STREAM_RESET;
4104 ch->chunk_flags = 0;
4105 ch->chunk_length = htons(chk->send_size);
4106 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4107 offset += sizeof(struct sctp_chunkhdr);
4108 while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) {
4109 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *) & pstore);
4112 param_len = ntohs(ph->param_length);
4113 if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) {
4117 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, (int)sizeof(cstore)),
4118 (uint8_t *) & cstore);
4119 ptype = ntohs(ph->param_type);
4121 if (param_len > (int)sizeof(cstore)) {
4126 if (num_param > SCTP_MAX_RESET_PARAMS) {
4127 /* hit the max of parameters already sorry.. */
4130 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4131 struct sctp_stream_reset_out_request *req_out;
4133 req_out = (struct sctp_stream_reset_out_request *)ph;
4135 if (stcb->asoc.stream_reset_outstanding) {
4136 seq = ntohl(req_out->response_seq);
4137 if (seq == stcb->asoc.str_reset_seq_out) {
4139 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4142 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4143 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4144 struct sctp_stream_reset_add_strm *str_add;
4146 str_add = (struct sctp_stream_reset_add_strm *)ph;
4148 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4149 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4150 struct sctp_stream_reset_add_strm *str_add;
4152 str_add = (struct sctp_stream_reset_add_strm *)ph;
4154 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4155 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4156 struct sctp_stream_reset_in_request *req_in;
4159 req_in = (struct sctp_stream_reset_in_request *)ph;
4160 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4161 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4162 struct sctp_stream_reset_tsn_request *req_tsn;
4165 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4166 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4168 goto strres_nochunk;
4172 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4173 struct sctp_stream_reset_response *resp;
4176 resp = (struct sctp_stream_reset_response *)ph;
4177 seq = ntohl(resp->response_seq);
4178 result = ntohl(resp->result);
4179 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4181 goto strres_nochunk;
4186 offset += SCTP_SIZE32(param_len);
4187 chk_length -= SCTP_SIZE32(param_len);
4190 /* we have no response free the stuff */
4191 goto strres_nochunk;
4193 /* ok we have a chunk to link in */
4194 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4197 stcb->asoc.ctrl_queue_cnt++;
4202 * Handle a router or endpoints report of a packet loss, there are two ways
4203 * to handle this, either we get the whole packet and must disect it
4204 * ourselves (possibly with truncation and or corruption) or it is a summary
4205 * from a middle box that did the disectting for us.
4208 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4209 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4211 uint32_t bottle_bw, on_queue;
4215 struct sctp_chunk_desc desc;
4216 struct sctp_chunkhdr *ch;
4218 chlen = ntohs(cp->ch.chunk_length);
4219 chlen -= sizeof(struct sctp_pktdrop_chunk);
4220 /* XXX possible chlen underflow */
4223 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4224 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4226 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4227 chlen -= sizeof(struct sctphdr);
4228 /* XXX possible chlen underflow */
4229 memset(&desc, 0, sizeof(desc));
4231 trunc_len = (uint16_t) ntohs(cp->trunc_len);
4232 if (trunc_len > limit) {
4235 /* now the chunks themselves */
4236 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4237 desc.chunk_type = ch->chunk_type;
4238 /* get amount we need to move */
4239 at = ntohs(ch->chunk_length);
4240 if (at < sizeof(struct sctp_chunkhdr)) {
4241 /* corrupt chunk, maybe at the end? */
4242 SCTP_STAT_INCR(sctps_pdrpcrupt);
4245 if (trunc_len == 0) {
4246 /* we are supposed to have all of it */
4248 /* corrupt skip it */
4249 SCTP_STAT_INCR(sctps_pdrpcrupt);
4253 /* is there enough of it left ? */
4254 if (desc.chunk_type == SCTP_DATA) {
4255 if (chlen < (sizeof(struct sctp_data_chunk) +
4256 sizeof(desc.data_bytes))) {
4260 if (chlen < sizeof(struct sctp_chunkhdr)) {
4265 if (desc.chunk_type == SCTP_DATA) {
4266 /* can we get out the tsn? */
4267 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4268 SCTP_STAT_INCR(sctps_pdrpmbda);
4270 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4272 struct sctp_data_chunk *dcp;
4276 dcp = (struct sctp_data_chunk *)ch;
4277 ddp = (uint8_t *) (dcp + 1);
4278 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4279 desc.data_bytes[iii] = ddp[iii];
4281 desc.tsn_ifany = dcp->dp.tsn;
4283 /* nope we are done. */
4284 SCTP_STAT_INCR(sctps_pdrpnedat);
4288 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4289 SCTP_STAT_INCR(sctps_pdrpmbct);
4292 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4293 SCTP_STAT_INCR(sctps_pdrppdbrk);
4296 if (SCTP_SIZE32(at) > chlen) {
4299 chlen -= SCTP_SIZE32(at);
4300 if (chlen < sizeof(struct sctp_chunkhdr)) {
4301 /* done, none left */
4304 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4306 /* Now update any rwnd --- possibly */
4307 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4308 /* From a peer, we get a rwnd report */
4311 SCTP_STAT_INCR(sctps_pdrpfehos);
4313 bottle_bw = ntohl(cp->bottle_bw);
4314 on_queue = ntohl(cp->current_onq);
4315 if (bottle_bw && on_queue) {
4316 /* a rwnd report is in here */
4317 if (bottle_bw > on_queue)
4318 a_rwnd = bottle_bw - on_queue;
4323 stcb->asoc.peers_rwnd = 0;
4325 if (a_rwnd > stcb->asoc.total_flight) {
4326 stcb->asoc.peers_rwnd =
4327 a_rwnd - stcb->asoc.total_flight;
4329 stcb->asoc.peers_rwnd = 0;
4331 if (stcb->asoc.peers_rwnd <
4332 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4333 /* SWS sender side engages */
4334 stcb->asoc.peers_rwnd = 0;
4339 SCTP_STAT_INCR(sctps_pdrpfmbox);
4342 /* now middle boxes in sat networks get a cwnd bump */
4343 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4344 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4345 (stcb->asoc.sat_network)) {
4347 * This is debateable but for sat networks it makes sense
4348 * Note if a T3 timer has went off, we will prohibit any
4349 * changes to cwnd until we exit the t3 loss recovery.
4351 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4352 net, cp, &bottle_bw, &on_queue);
4357 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4358 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4359 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4360 * length of the complete packet outputs: - length: modified to remaining
4361 * length after control processing - netp: modified to new sctp_nets after
4362 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4363 * bad packet,...) otherwise return the tcb for this packet
4366 __attribute__((noinline))
4368 static struct sctp_tcb *
4369 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4370 struct sockaddr *src, struct sockaddr *dst,
4371 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4372 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4373 uint8_t use_mflowid, uint32_t mflowid,
4374 uint32_t vrf_id, uint16_t port)
4376 struct sctp_association *asoc;
4377 struct mbuf *op_err;
4378 char msg[SCTP_DIAG_INFO_LEN];
4380 int num_chunks = 0; /* number of control chunks processed */
4381 uint32_t chk_length;
4383 int abort_no_unlock = 0;
4387 * How big should this be, and should it be alloc'd? Lets try the
4388 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4389 * until we get into jumbo grams and such..
4391 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4392 struct sctp_tcb *locked_tcb = stcb;
4394 uint32_t auth_offset = 0, auth_len = 0;
4395 int auth_skipped = 0;
4398 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4403 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4404 iphlen, *offset, length, (void *)stcb);
4406 /* validate chunk header length... */
4407 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4408 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4409 ntohs(ch->chunk_length));
4411 SCTP_TCB_UNLOCK(locked_tcb);
4416 * validate the verification tag
4418 vtag_in = ntohl(sh->v_tag);
4421 SCTP_TCB_LOCK_ASSERT(locked_tcb);
4423 if (ch->chunk_type == SCTP_INITIATION) {
4424 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4425 ntohs(ch->chunk_length), vtag_in);
4427 /* protocol error- silently discard... */
4428 SCTP_STAT_INCR(sctps_badvtag);
4430 SCTP_TCB_UNLOCK(locked_tcb);
4434 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4436 * If there is no stcb, skip the AUTH chunk and process
4437 * later after a stcb is found (to validate the lookup was
4440 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4442 !SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4443 /* save this chunk for later processing */
4445 auth_offset = *offset;
4446 auth_len = ntohs(ch->chunk_length);
4448 /* (temporarily) move past this chunk */
4449 *offset += SCTP_SIZE32(auth_len);
4450 if (*offset >= length) {
4451 /* no more data left in the mbuf chain */
4454 SCTP_TCB_UNLOCK(locked_tcb);
4458 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4459 sizeof(struct sctp_chunkhdr), chunk_buf);
4465 SCTP_TCB_UNLOCK(locked_tcb);
4469 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4470 goto process_control_chunks;
4473 * first check if it's an ASCONF with an unknown src addr we
4474 * need to look inside to find the association
4476 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4477 struct sctp_chunkhdr *asconf_ch = ch;
4478 uint32_t asconf_offset = 0, asconf_len = 0;
4480 /* inp's refcount may be reduced */
4481 SCTP_INP_INCR_REF(inp);
4483 asconf_offset = *offset;
4485 asconf_len = ntohs(asconf_ch->chunk_length);
4486 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4488 stcb = sctp_findassociation_ep_asconf(m,
4491 sh, &inp, netp, vrf_id);
4494 asconf_offset += SCTP_SIZE32(asconf_len);
4495 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4496 sizeof(struct sctp_chunkhdr), chunk_buf);
4497 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4500 * reduce inp's refcount if not reduced in
4501 * sctp_findassociation_ep_asconf().
4503 SCTP_INP_DECR_REF(inp);
4508 /* now go back and verify any auth chunk to be sure */
4509 if (auth_skipped && (stcb != NULL)) {
4510 struct sctp_auth_chunk *auth;
4512 auth = (struct sctp_auth_chunk *)
4513 sctp_m_getptr(m, auth_offset,
4514 auth_len, chunk_buf);
4517 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4519 /* auth HMAC failed so dump it */
4522 SCTP_TCB_UNLOCK(locked_tcb);
4526 /* remaining chunks are HMAC checked */
4527 stcb->asoc.authenticated = 1;
4532 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
4533 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4535 /* no association, so it's out of the blue... */
4536 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4537 use_mflowid, mflowid,
4541 SCTP_TCB_UNLOCK(locked_tcb);
4546 /* ABORT and SHUTDOWN can use either v_tag... */
4547 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4548 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4549 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4550 /* Take the T-bit always into account. */
4551 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4552 (vtag_in == asoc->my_vtag)) ||
4553 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4554 (vtag_in == asoc->peer_vtag))) {
4557 /* drop this packet... */
4558 SCTP_STAT_INCR(sctps_badvtag);
4560 SCTP_TCB_UNLOCK(locked_tcb);
4564 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4565 if (vtag_in != asoc->my_vtag) {
4567 * this could be a stale SHUTDOWN-ACK or the
4568 * peer never got the SHUTDOWN-COMPLETE and
4569 * is still hung; we have started a new asoc
4570 * but it won't complete until the shutdown
4574 SCTP_TCB_UNLOCK(locked_tcb);
4576 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
4577 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4579 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4581 use_mflowid, mflowid,
4586 /* for all other chunks, vtag must match */
4587 if (vtag_in != asoc->my_vtag) {
4588 /* invalid vtag... */
4589 SCTPDBG(SCTP_DEBUG_INPUT3,
4590 "invalid vtag: %xh, expect %xh\n",
4591 vtag_in, asoc->my_vtag);
4592 SCTP_STAT_INCR(sctps_badvtag);
4594 SCTP_TCB_UNLOCK(locked_tcb);
4600 } /* end if !SCTP_COOKIE_ECHO */
4602 * process all control chunks...
4604 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4605 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4606 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4607 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
4608 /* implied cookie-ack.. we must have lost the ack */
4609 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
4610 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
4611 stcb->asoc.overall_error_count,
4613 SCTP_FROM_SCTP_INPUT,
4616 stcb->asoc.overall_error_count = 0;
4617 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4620 process_control_chunks:
4621 while (IS_SCTP_CONTROL(ch)) {
4622 /* validate chunk length */
4623 chk_length = ntohs(ch->chunk_length);
4624 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4625 ch->chunk_type, chk_length);
4626 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4627 if (chk_length < sizeof(*ch) ||
4628 (*offset + (int)chk_length) > length) {
4631 SCTP_TCB_UNLOCK(locked_tcb);
4635 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4637 * INIT-ACK only gets the init ack "header" portion only
4638 * because we don't have to process the peer's COOKIE. All
4639 * others get a complete chunk.
4641 if ((ch->chunk_type == SCTP_INITIATION_ACK) ||
4642 (ch->chunk_type == SCTP_INITIATION)) {
4643 /* get an init-ack chunk */
4644 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4645 sizeof(struct sctp_init_ack_chunk), chunk_buf);
4649 SCTP_TCB_UNLOCK(locked_tcb);
4654 /* For cookies and all other chunks. */
4655 if (chk_length > sizeof(chunk_buf)) {
4657 * use just the size of the chunk buffer so
4658 * the front part of our chunks fit in
4659 * contiguous space up to the chunk buffer
4660 * size (508 bytes). For chunks that need to
4661 * get more than that they must use the
4662 * sctp_m_getptr() function or other means
4663 * (e.g. know how to parse mbuf chains).
4664 * Cookies do this already.
4666 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4667 (sizeof(chunk_buf) - 4),
4672 SCTP_TCB_UNLOCK(locked_tcb);
4677 /* We can fit it all */
4678 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4679 chk_length, chunk_buf);
4681 SCTP_PRINTF("sctp_process_control: Can't get the all data....\n");
4684 SCTP_TCB_UNLOCK(locked_tcb);
4691 /* Save off the last place we got a control from */
4693 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4695 * allow last_control to be NULL if
4696 * ASCONF... ASCONF processing will find the
4699 if ((netp != NULL) && (*netp != NULL))
4700 stcb->asoc.last_control_chunk_from = *netp;
4703 #ifdef SCTP_AUDITING_ENABLED
4704 sctp_audit_log(0xB0, ch->chunk_type);
4707 /* check to see if this chunk required auth, but isn't */
4708 if ((stcb != NULL) &&
4709 !SCTP_BASE_SYSCTL(sctp_auth_disable) &&
4710 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4711 !stcb->asoc.authenticated) {
4712 /* "silently" ignore */
4713 SCTP_STAT_INCR(sctps_recvauthmissing);
4716 switch (ch->chunk_type) {
4717 case SCTP_INITIATION:
4718 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4719 /* The INIT chunk must be the only chunk. */
4720 if ((num_chunks > 1) ||
4721 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4722 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4723 "INIT not the only chunk");
4724 sctp_abort_association(inp, stcb, m, iphlen,
4725 src, dst, sh, op_err,
4726 use_mflowid, mflowid,
4731 /* Honor our resource limit. */
4732 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4733 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4734 sctp_abort_association(inp, stcb, m, iphlen,
4735 src, dst, sh, op_err,
4736 use_mflowid, mflowid,
4741 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4742 (struct sctp_init_chunk *)ch, inp,
4743 stcb, &abort_no_unlock,
4744 use_mflowid, mflowid,
4747 if ((!abort_no_unlock) && (locked_tcb)) {
4748 SCTP_TCB_UNLOCK(locked_tcb);
4752 case SCTP_PAD_CHUNK:
4754 case SCTP_INITIATION_ACK:
4755 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n");
4756 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4757 /* We are not interested anymore */
4758 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4761 if (locked_tcb != stcb) {
4763 SCTP_TCB_UNLOCK(locked_tcb);
4767 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4768 so = SCTP_INP_SO(inp);
4769 atomic_add_int(&stcb->asoc.refcnt, 1);
4770 SCTP_TCB_UNLOCK(stcb);
4771 SCTP_SOCKET_LOCK(so, 1);
4772 SCTP_TCB_LOCK(stcb);
4773 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4775 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
4776 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4777 SCTP_SOCKET_UNLOCK(so, 1);
4783 /* The INIT-ACK chunk must be the only chunk. */
4784 if ((num_chunks > 1) ||
4785 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4788 SCTP_TCB_UNLOCK(locked_tcb);
4792 if ((netp) && (*netp)) {
4793 ret = sctp_handle_init_ack(m, iphlen, *offset,
4795 (struct sctp_init_ack_chunk *)ch,
4798 use_mflowid, mflowid,
4804 if (abort_no_unlock) {
4808 * Special case, I must call the output routine to
4809 * get the cookie echoed
4811 if ((stcb != NULL) && (ret == 0)) {
4812 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4815 SCTP_TCB_UNLOCK(locked_tcb);
4819 case SCTP_SELECTIVE_ACK:
4821 struct sctp_sack_chunk *sack;
4823 uint32_t a_rwnd, cum_ack;
4824 uint16_t num_seg, num_dup;
4826 int offset_seg, offset_dup;
4828 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n");
4829 SCTP_STAT_INCR(sctps_recvsacks);
4831 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing SACK chunk\n");
4834 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4835 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4838 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4840 * If we have sent a shutdown-ack, we will pay no
4841 * attention to a sack sent in to us since
4842 * we don't care anymore.
4846 sack = (struct sctp_sack_chunk *)ch;
4847 flags = ch->chunk_flags;
4848 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4849 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4850 num_dup = ntohs(sack->sack.num_dup_tsns);
4851 a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd);
4852 if (sizeof(struct sctp_sack_chunk) +
4853 num_seg * sizeof(struct sctp_gap_ack_block) +
4854 num_dup * sizeof(uint32_t) != chk_length) {
4855 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4858 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4859 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4860 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4861 cum_ack, num_seg, a_rwnd);
4862 stcb->asoc.seen_a_sack_this_pkt = 1;
4863 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4865 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4866 (stcb->asoc.saw_sack_with_frags == 0) &&
4867 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4868 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))
4871 * We have a SIMPLE sack having no
4872 * prior segments and data on sent
4873 * queue to be acked.. Use the
4874 * faster path sack processing. We
4875 * also allow window update sacks
4876 * with no missing segments to go
4879 sctp_express_handle_sack(stcb, cum_ack, a_rwnd, &abort_now, ecne_seen);
4882 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4883 num_seg, 0, num_dup, &abort_now, flags,
4884 cum_ack, a_rwnd, ecne_seen);
4887 /* ABORT signal from sack processing */
4891 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4892 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4893 (stcb->asoc.stream_queue_cnt == 0)) {
4894 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4899 * EY - nr_sack: If the received chunk is an
4902 case SCTP_NR_SELECTIVE_ACK:
4904 struct sctp_nr_sack_chunk *nr_sack;
4906 uint32_t a_rwnd, cum_ack;
4907 uint16_t num_seg, num_nr_seg, num_dup;
4909 int offset_seg, offset_dup;
4911 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK\n");
4912 SCTP_STAT_INCR(sctps_recvsacks);
4914 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing NR-SACK chunk\n");
4917 if (stcb->asoc.nrsack_supported == 0) {
4920 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4921 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR-SACK chunk, too small\n");
4924 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4926 * If we have sent a shutdown-ack, we will pay no
4927 * attention to a sack sent in to us since
4928 * we don't care anymore.
4932 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4933 flags = ch->chunk_flags;
4934 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4935 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4936 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4937 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4938 a_rwnd = (uint32_t) ntohl(nr_sack->nr_sack.a_rwnd);
4939 if (sizeof(struct sctp_nr_sack_chunk) +
4940 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4941 num_dup * sizeof(uint32_t) != chk_length) {
4942 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4945 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4946 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4947 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4948 cum_ack, num_seg, a_rwnd);
4949 stcb->asoc.seen_a_sack_this_pkt = 1;
4950 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4951 (num_seg == 0) && (num_nr_seg == 0) &&
4952 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4953 (stcb->asoc.saw_sack_with_frags == 0) &&
4954 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4955 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4957 * We have a SIMPLE sack having no
4958 * prior segments and data on sent
4959 * queue to be acked. Use the faster
4960 * path sack processing. We also
4961 * allow window update sacks with no
4962 * missing segments to go this way
4965 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4966 &abort_now, ecne_seen);
4969 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4970 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4971 cum_ack, a_rwnd, ecne_seen);
4974 /* ABORT signal from sack processing */
4978 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4979 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4980 (stcb->asoc.stream_queue_cnt == 0)) {
4981 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4986 case SCTP_HEARTBEAT_REQUEST:
4987 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4988 if ((stcb) && netp && *netp) {
4989 SCTP_STAT_INCR(sctps_recvheartbeat);
4990 sctp_send_heartbeat_ack(stcb, m, *offset,
4993 /* He's alive so give him credit */
4994 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
4995 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
4996 stcb->asoc.overall_error_count,
4998 SCTP_FROM_SCTP_INPUT,
5001 stcb->asoc.overall_error_count = 0;
5004 case SCTP_HEARTBEAT_ACK:
5005 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n");
5006 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5010 SCTP_TCB_UNLOCK(locked_tcb);
5014 /* He's alive so give him credit */
5015 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5016 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5017 stcb->asoc.overall_error_count,
5019 SCTP_FROM_SCTP_INPUT,
5022 stcb->asoc.overall_error_count = 0;
5023 SCTP_STAT_INCR(sctps_recvheartbeatack);
5025 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5028 case SCTP_ABORT_ASSOCIATION:
5029 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5031 if ((stcb) && netp && *netp)
5032 sctp_handle_abort((struct sctp_abort_chunk *)ch,
5038 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5040 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5043 SCTP_TCB_UNLOCK(locked_tcb);
5047 if (netp && *netp) {
5050 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5051 stcb, *netp, &abort_flag);
5058 case SCTP_SHUTDOWN_ACK:
5059 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", (void *)stcb);
5060 if ((stcb) && (netp) && (*netp))
5061 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5066 case SCTP_OPERATION_ERROR:
5067 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n");
5068 if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) {
5073 case SCTP_COOKIE_ECHO:
5074 SCTPDBG(SCTP_DEBUG_INPUT3,
5075 "SCTP_COOKIE-ECHO, stcb %p\n", (void *)stcb);
5076 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5079 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5080 /* We are not interested anymore */
5083 SCTP_TCB_UNLOCK(stcb);
5090 * First are we accepting? We do this again here
5091 * since it is possible that a previous endpoint WAS
5092 * listening responded to a INIT-ACK and then
5093 * closed. We opened and bound.. and are now no
5097 if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
5098 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5099 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5100 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5101 sctp_abort_association(inp, stcb, m, iphlen,
5102 src, dst, sh, op_err,
5103 use_mflowid, mflowid,
5109 struct mbuf *ret_buf;
5110 struct sctp_inpcb *linp;
5119 SCTP_ASOC_CREATE_LOCK(linp);
5120 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5121 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5122 SCTP_ASOC_CREATE_UNLOCK(linp);
5128 sctp_handle_cookie_echo(m, iphlen,
5132 (struct sctp_cookie_echo_chunk *)ch,
5146 SCTP_ASOC_CREATE_UNLOCK(linp);
5148 if (ret_buf == NULL) {
5150 SCTP_TCB_UNLOCK(locked_tcb);
5152 SCTPDBG(SCTP_DEBUG_INPUT3,
5153 "GAK, null buffer\n");
5157 /* if AUTH skipped, see if it verified... */
5162 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5164 * Restart the timer if we have
5167 struct sctp_tmit_chunk *chk;
5169 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5170 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5174 case SCTP_COOKIE_ACK:
5175 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", (void *)stcb);
5176 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5178 SCTP_TCB_UNLOCK(locked_tcb);
5182 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5183 /* We are not interested anymore */
5184 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5187 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5188 so = SCTP_INP_SO(inp);
5189 atomic_add_int(&stcb->asoc.refcnt, 1);
5190 SCTP_TCB_UNLOCK(stcb);
5191 SCTP_SOCKET_LOCK(so, 1);
5192 SCTP_TCB_LOCK(stcb);
5193 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5195 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
5196 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5197 SCTP_SOCKET_UNLOCK(so, 1);
5203 /* He's alive so give him credit */
5204 if ((stcb) && netp && *netp) {
5205 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5206 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5207 stcb->asoc.overall_error_count,
5209 SCTP_FROM_SCTP_INPUT,
5212 stcb->asoc.overall_error_count = 0;
5213 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5217 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n");
5218 /* He's alive so give him credit */
5219 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5222 SCTP_TCB_UNLOCK(locked_tcb);
5228 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5229 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5230 stcb->asoc.overall_error_count,
5232 SCTP_FROM_SCTP_INPUT,
5235 stcb->asoc.overall_error_count = 0;
5236 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch,
5242 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n");
5243 /* He's alive so give him credit */
5244 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5247 SCTP_TCB_UNLOCK(locked_tcb);
5253 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5254 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5255 stcb->asoc.overall_error_count,
5257 SCTP_FROM_SCTP_INPUT,
5260 stcb->asoc.overall_error_count = 0;
5261 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5264 case SCTP_SHUTDOWN_COMPLETE:
5265 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", (void *)stcb);
5266 /* must be first and only chunk */
5267 if ((num_chunks > 1) ||
5268 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5271 SCTP_TCB_UNLOCK(locked_tcb);
5275 if ((stcb) && netp && *netp) {
5276 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5283 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5284 /* He's alive so give him credit */
5286 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5287 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5288 stcb->asoc.overall_error_count,
5290 SCTP_FROM_SCTP_INPUT,
5293 stcb->asoc.overall_error_count = 0;
5294 sctp_handle_asconf(m, *offset, src,
5295 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5299 case SCTP_ASCONF_ACK:
5300 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n");
5301 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5304 SCTP_TCB_UNLOCK(locked_tcb);
5309 if ((stcb) && netp && *netp) {
5310 /* He's alive so give him credit */
5311 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5312 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5313 stcb->asoc.overall_error_count,
5315 SCTP_FROM_SCTP_INPUT,
5318 stcb->asoc.overall_error_count = 0;
5319 sctp_handle_asconf_ack(m, *offset,
5320 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5321 if (abort_no_unlock)
5325 case SCTP_FORWARD_CUM_TSN:
5326 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n");
5327 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5330 SCTP_TCB_UNLOCK(locked_tcb);
5335 /* He's alive so give him credit */
5339 stcb->asoc.overall_error_count = 0;
5340 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5341 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5342 stcb->asoc.overall_error_count,
5344 SCTP_FROM_SCTP_INPUT,
5348 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5349 /* We are not interested anymore */
5350 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5351 so = SCTP_INP_SO(inp);
5352 atomic_add_int(&stcb->asoc.refcnt, 1);
5353 SCTP_TCB_UNLOCK(stcb);
5354 SCTP_SOCKET_LOCK(so, 1);
5355 SCTP_TCB_LOCK(stcb);
5356 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5358 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
5359 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5360 SCTP_SOCKET_UNLOCK(so, 1);
5365 sctp_handle_forward_tsn(stcb,
5366 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5371 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5372 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5373 stcb->asoc.overall_error_count,
5375 SCTP_FROM_SCTP_INPUT,
5378 stcb->asoc.overall_error_count = 0;
5383 case SCTP_STREAM_RESET:
5384 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5385 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5388 SCTP_TCB_UNLOCK(locked_tcb);
5393 if (stcb->asoc.reconfig_supported == 0) {
5395 * hmm, peer should have announced this, but
5396 * we will turn it on since he is sending us
5399 stcb->asoc.reconfig_supported = 1;
5401 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5402 /* stop processing */
5407 case SCTP_PACKET_DROPPED:
5408 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5409 /* re-get it all please */
5410 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5413 SCTP_TCB_UNLOCK(locked_tcb);
5418 if (ch && (stcb) && netp && (*netp)) {
5419 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5421 min(chk_length, (sizeof(chunk_buf) - 4)));
5426 case SCTP_AUTHENTICATION:
5427 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5428 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
5432 /* save the first AUTH for later processing */
5433 if (auth_skipped == 0) {
5434 auth_offset = *offset;
5435 auth_len = chk_length;
5438 /* skip this chunk (temporarily) */
5441 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5442 (chk_length > (sizeof(struct sctp_auth_chunk) +
5443 SCTP_AUTH_DIGEST_LEN_MAX))) {
5446 SCTP_TCB_UNLOCK(locked_tcb);
5451 if (got_auth == 1) {
5452 /* skip this chunk... it's already auth'd */
5456 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5458 /* auth HMAC failed so dump the packet */
5462 /* remaining chunks are HMAC checked */
5463 stcb->asoc.authenticated = 1;
5469 /* it's an unknown chunk! */
5470 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5472 struct sctp_paramhdr *phd;
5474 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
5475 0, M_NOWAIT, 1, MT_DATA);
5477 phd = mtod(mm, struct sctp_paramhdr *);
5479 * We cheat and use param type since
5480 * we did not bother to define a
5481 * error cause struct. They are the
5482 * same basic format with different
5485 phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5486 phd->param_length = htons(chk_length + sizeof(*phd));
5487 SCTP_BUF_LEN(mm) = sizeof(*phd);
5488 SCTP_BUF_NEXT(mm) = SCTP_M_COPYM(m, *offset, chk_length, M_NOWAIT);
5489 if (SCTP_BUF_NEXT(mm)) {
5490 if (sctp_pad_lastmbuf(SCTP_BUF_NEXT(mm), SCTP_SIZE32(chk_length) - chk_length, NULL) == NULL) {
5493 #ifdef SCTP_MBUF_LOGGING
5494 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5497 for (mat = SCTP_BUF_NEXT(mm); mat; mat = SCTP_BUF_NEXT(mat)) {
5498 if (SCTP_BUF_IS_EXTENDED(mat)) {
5499 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
5504 sctp_queue_op_err(stcb, mm);
5511 if ((ch->chunk_type & 0x80) == 0) {
5512 /* discard this packet */
5515 } /* else skip this bad chunk and continue... */
5517 } /* switch (ch->chunk_type) */
5521 /* get the next chunk */
5522 *offset += SCTP_SIZE32(chk_length);
5523 if (*offset >= length) {
5524 /* no more data left in the mbuf chain */
5527 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5528 sizeof(struct sctp_chunkhdr), chunk_buf);
5531 SCTP_TCB_UNLOCK(locked_tcb);
5538 if (asconf_cnt > 0 && stcb != NULL) {
5539 sctp_send_asconf_ack(stcb);
5547 __attribute__((noinline))
5550 sctp_validate_no_locks(struct sctp_inpcb *inp)
5552 struct sctp_tcb *lstcb;
5554 LIST_FOREACH(lstcb, &inp->sctp_asoc_list, sctp_tcblist) {
5555 if (mtx_owned(&lstcb->tcb_mtx)) {
5556 panic("Own lock on stcb at return from input");
5559 if (mtx_owned(&inp->inp_create_mtx)) {
5560 panic("Own create lock on inp");
5562 if (mtx_owned(&inp->inp_mtx)) {
5563 panic("Own inp lock on inp");
5570 * common input chunk processing (v4 and v6)
5573 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5574 struct sockaddr *src, struct sockaddr *dst,
5575 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5576 #if !defined(SCTP_WITH_NO_CSUM)
5577 uint8_t compute_crc,
5580 uint8_t use_mflowid, uint32_t mflowid,
5581 uint32_t vrf_id, uint16_t port)
5584 int fwd_tsn_seen = 0, data_processed = 0;
5585 struct mbuf *m = *mm, *op_err;
5586 char msg[SCTP_DIAG_INFO_LEN];
5588 int cnt_ctrl_ready = 0;
5589 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5590 struct sctp_tcb *stcb = NULL;
5591 struct sctp_nets *net = NULL;
5593 SCTP_STAT_INCR(sctps_recvdatagrams);
5594 #ifdef SCTP_AUDITING_ENABLED
5595 sctp_audit_log(0xE0, 1);
5596 sctp_auditing(0, inp, stcb, net);
5598 #if !defined(SCTP_WITH_NO_CSUM)
5599 if (compute_crc != 0) {
5600 uint32_t check, calc_check;
5602 check = sh->checksum;
5604 calc_check = sctp_calculate_cksum(m, iphlen);
5605 sh->checksum = check;
5606 if (calc_check != check) {
5607 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5608 calc_check, check, (void *)m, length, iphlen);
5609 stcb = sctp_findassociation_addr(m, offset, src, dst,
5610 sh, ch, &inp, &net, vrf_id);
5611 #if defined(INET) || defined(INET6)
5612 if ((net != NULL) && (port != 0)) {
5613 if (net->port == 0) {
5614 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5619 if ((net != NULL) && (use_mflowid != 0)) {
5620 net->flowid = mflowid;
5625 if ((inp != NULL) && (stcb != NULL)) {
5626 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5627 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5628 } else if ((inp != NULL) && (stcb == NULL)) {
5631 SCTP_STAT_INCR(sctps_badsum);
5632 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5637 /* Destination port of 0 is illegal, based on RFC4960. */
5638 if (sh->dest_port == 0) {
5639 SCTP_STAT_INCR(sctps_hdrops);
5642 stcb = sctp_findassociation_addr(m, offset, src, dst,
5643 sh, ch, &inp, &net, vrf_id);
5644 #if defined(INET) || defined(INET6)
5645 if ((net != NULL) && (port != 0)) {
5646 if (net->port == 0) {
5647 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5652 if ((net != NULL) && (use_mflowid != 0)) {
5653 net->flowid = mflowid;
5659 SCTP_STAT_INCR(sctps_noport);
5660 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5663 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5664 sctp_send_shutdown_complete2(src, dst, sh,
5665 use_mflowid, mflowid,
5669 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5672 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5673 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5674 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5675 (ch->chunk_type != SCTP_INIT))) {
5676 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5678 sctp_send_abort(m, iphlen, src, dst,
5680 use_mflowid, mflowid,
5685 } else if (stcb == NULL) {
5690 * I very much doubt any of the IPSEC stuff will work but I have no
5691 * idea, so I will leave it in place.
5694 switch (dst->sa_family) {
5697 if (ipsec4_in_reject(m, &inp->ip_inp.inp)) {
5698 IPSECSTAT_INC(ips_in_polvio);
5699 SCTP_STAT_INCR(sctps_hdrops);
5706 if (ipsec6_in_reject(m, &inp->ip_inp.inp)) {
5707 IPSEC6STAT_INC(ips_in_polvio);
5708 SCTP_STAT_INCR(sctps_hdrops);
5718 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5719 (void *)m, iphlen, offset, length, (void *)stcb);
5721 /* always clear this before beginning a packet */
5722 stcb->asoc.authenticated = 0;
5723 stcb->asoc.seen_a_sack_this_pkt = 0;
5724 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5725 (void *)stcb, stcb->asoc.state);
5727 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5728 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5730 * If we hit here, we had a ref count
5731 * up when the assoc was aborted and the
5732 * timer is clearing out the assoc, we should
5733 * NOT respond to any packet.. its OOTB.
5735 SCTP_TCB_UNLOCK(stcb);
5737 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5738 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5740 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5741 use_mflowid, mflowid,
5746 if (IS_SCTP_CONTROL(ch)) {
5747 /* process the control portion of the SCTP packet */
5748 /* sa_ignore NO_NULL_CHK */
5749 stcb = sctp_process_control(m, iphlen, &offset, length,
5751 inp, stcb, &net, &fwd_tsn_seen,
5752 use_mflowid, mflowid,
5756 * This covers us if the cookie-echo was there and
5757 * it changes our INP.
5759 inp = stcb->sctp_ep;
5760 #if defined(INET) || defined(INET6)
5761 if ((net) && (port)) {
5762 if (net->port == 0) {
5763 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5771 * no control chunks, so pre-process DATA chunks (these
5772 * checks are taken care of by control processing)
5776 * if DATA only packet, and auth is required, then punt...
5777 * can't have authenticated without any AUTH (control)
5780 if ((stcb != NULL) &&
5781 !SCTP_BASE_SYSCTL(sctp_auth_disable) &&
5782 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5783 /* "silently" ignore */
5784 SCTP_STAT_INCR(sctps_recvauthmissing);
5788 /* out of the blue DATA chunk */
5789 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5790 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5792 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5793 use_mflowid, mflowid,
5797 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5798 /* v_tag mismatch! */
5799 SCTP_STAT_INCR(sctps_badvtag);
5806 * no valid TCB for this packet, or we found it's a bad
5807 * packet while processing control, or we're done with this
5808 * packet (done or skip rest of data), so we drop it...
5813 * DATA chunk processing
5815 /* plow through the data chunks while length > offset */
5818 * Rest should be DATA only. Check authentication state if AUTH for
5821 if ((length > offset) &&
5823 !SCTP_BASE_SYSCTL(sctp_auth_disable) &&
5824 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5825 !stcb->asoc.authenticated) {
5826 /* "silently" ignore */
5827 SCTP_STAT_INCR(sctps_recvauthmissing);
5828 SCTPDBG(SCTP_DEBUG_AUTH1,
5829 "Data chunk requires AUTH, skipped\n");
5832 if (length > offset) {
5836 * First check to make sure our state is correct. We would
5837 * not get here unless we really did have a tag, so we don't
5838 * abort if this happens, just dump the chunk silently.
5840 switch (SCTP_GET_STATE(&stcb->asoc)) {
5841 case SCTP_STATE_COOKIE_ECHOED:
5843 * we consider data with valid tags in this state
5844 * shows us the cookie-ack was lost. Imply it was
5847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5848 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5849 stcb->asoc.overall_error_count,
5851 SCTP_FROM_SCTP_INPUT,
5854 stcb->asoc.overall_error_count = 0;
5855 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5857 case SCTP_STATE_COOKIE_WAIT:
5859 * We consider OOTB any data sent during asoc setup.
5861 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5862 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5864 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5865 use_mflowid, mflowid,
5868 /* sa_ignore NOTREACHED */
5870 case SCTP_STATE_EMPTY: /* should not happen */
5871 case SCTP_STATE_INUSE: /* should not happen */
5872 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5873 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5876 /* sa_ignore NOTREACHED */
5878 case SCTP_STATE_OPEN:
5879 case SCTP_STATE_SHUTDOWN_SENT:
5882 /* plow through the data chunks while length > offset */
5883 retval = sctp_process_data(mm, iphlen, &offset, length,
5885 inp, stcb, net, &high_tsn,
5886 use_mflowid, mflowid,
5890 * The association aborted, NO UNLOCK needed since
5891 * the association is destroyed.
5898 * Anything important needs to have been m_copy'ed in
5902 /* take care of ecn */
5903 if ((data_processed == 1) &&
5904 (stcb->asoc.ecn_supported == 1) &&
5905 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5906 /* Yep, we need to add a ECNE */
5907 sctp_send_ecn_echo(stcb, net, high_tsn);
5909 if ((data_processed == 0) && (fwd_tsn_seen)) {
5911 uint32_t highest_tsn;
5913 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5914 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5916 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5918 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5919 stcb->asoc.send_sack = 1;
5920 sctp_sack_check(stcb, was_a_gap);
5921 } else if (fwd_tsn_seen) {
5922 stcb->asoc.send_sack = 1;
5924 /* trigger send of any chunks in queue... */
5926 #ifdef SCTP_AUDITING_ENABLED
5927 sctp_audit_log(0xE0, 2);
5928 sctp_auditing(1, inp, stcb, net);
5930 SCTPDBG(SCTP_DEBUG_INPUT1,
5931 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5932 stcb->asoc.peers_rwnd,
5933 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5934 stcb->asoc.total_flight);
5935 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5936 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5937 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5939 if (cnt_ctrl_ready ||
5941 (stcb->asoc.peers_rwnd > 0 ||
5942 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5943 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5944 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5945 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5947 #ifdef SCTP_AUDITING_ENABLED
5948 sctp_audit_log(0xE0, 3);
5949 sctp_auditing(2, inp, stcb, net);
5953 SCTP_TCB_UNLOCK(stcb);
5955 if (inp_decr != NULL) {
5956 /* reduce ref-count */
5957 SCTP_INP_WLOCK(inp_decr);
5958 SCTP_INP_DECR_REF(inp_decr);
5959 SCTP_INP_WUNLOCK(inp_decr);
5963 sctp_validate_no_locks(inp);
5971 sctp_print_mbuf_chain(struct mbuf *m)
5973 for (; m; m = SCTP_BUF_NEXT(m)) {
5974 SCTP_PRINTF("%p: m_len = %ld\n", (void *)m, SCTP_BUF_LEN(m));
5975 if (SCTP_BUF_IS_EXTENDED(m))
5976 SCTP_PRINTF("%p: extend_size = %d\n", (void *)m, SCTP_BUF_EXTEND_SIZE(m));
5984 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5988 uint32_t vrf_id = 0;
5990 struct sockaddr_in src, dst;
5993 struct sctp_chunkhdr *ch;
5996 #if !defined(SCTP_WITH_NO_CSUM)
5997 uint8_t compute_crc;
6001 uint8_t use_mflowid;
6004 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
6005 SCTP_RELEASE_PKT(i_pak);
6008 m = SCTP_HEADER_TO_CHAIN(i_pak);
6009 #ifdef SCTP_MBUF_LOGGING
6010 /* Log in any input mbufs */
6011 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6014 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6015 if (SCTP_BUF_IS_EXTENDED(mat)) {
6016 sctp_log_mb(mat, SCTP_MBUF_INPUT);
6021 #ifdef SCTP_PACKET_LOGGING
6022 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
6026 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
6027 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
6029 if_name(m->m_pkthdr.rcvif),
6030 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
6031 if (m->m_flags & M_FLOWID) {
6032 mflowid = m->m_pkthdr.flowid;
6038 SCTP_STAT_INCR(sctps_recvpackets);
6039 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
6040 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
6041 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
6042 if (SCTP_BUF_LEN(m) < offset) {
6043 if ((m = m_pullup(m, offset)) == NULL) {
6044 SCTP_STAT_INCR(sctps_hdrops);
6048 ip = mtod(m, struct ip *);
6049 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
6050 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
6051 offset -= sizeof(struct sctp_chunkhdr);
6052 memset(&src, 0, sizeof(struct sockaddr_in));
6053 src.sin_family = AF_INET;
6054 src.sin_len = sizeof(struct sockaddr_in);
6055 src.sin_port = sh->src_port;
6056 src.sin_addr = ip->ip_src;
6057 memset(&dst, 0, sizeof(struct sockaddr_in));
6058 dst.sin_family = AF_INET;
6059 dst.sin_len = sizeof(struct sockaddr_in);
6060 dst.sin_port = sh->dest_port;
6061 dst.sin_addr = ip->ip_dst;
6062 length = ntohs(ip->ip_len);
6063 /* Validate mbuf chain length with IP payload length. */
6064 if (SCTP_HEADER_LEN(m) != length) {
6065 SCTPDBG(SCTP_DEBUG_INPUT1,
6066 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
6067 SCTP_STAT_INCR(sctps_hdrops);
6070 /* SCTP does not allow broadcasts or multicasts */
6071 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
6074 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
6077 ecn_bits = ip->ip_tos;
6078 #if defined(SCTP_WITH_NO_CSUM)
6079 SCTP_STAT_INCR(sctps_recvnocrc);
6081 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
6082 SCTP_STAT_INCR(sctps_recvhwcrc);
6085 SCTP_STAT_INCR(sctps_recvswcrc);
6089 sctp_common_input_processing(&m, iphlen, offset, length,
6090 (struct sockaddr *)&src,
6091 (struct sockaddr *)&dst,
6093 #if !defined(SCTP_WITH_NO_CSUM)
6097 use_mflowid, mflowid,
6106 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6107 extern int *sctp_cpuarry;
6112 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
6119 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6125 uint32_t flowid, tag;
6127 if (m->m_flags & M_FLOWID) {
6128 flowid = m->m_pkthdr.flowid;
6131 * No flow id built by lower layers fix it so we
6134 offset = off + sizeof(struct sctphdr);
6135 if (SCTP_BUF_LEN(m) < offset) {
6136 if ((m = m_pullup(m, offset)) == NULL) {
6137 SCTP_STAT_INCR(sctps_hdrops);
6138 return (IPPROTO_DONE);
6141 ip = mtod(m, struct ip *);
6142 sh = (struct sctphdr *)((caddr_t)ip + off);
6143 tag = htonl(sh->v_tag);
6144 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6145 m->m_pkthdr.flowid = flowid;
6146 m->m_flags |= M_FLOWID;
6148 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6149 sctp_queue_to_mcore(m, off, cpu_to_use);
6150 return (IPPROTO_DONE);
6153 sctp_input_with_port(m, off, 0);
6154 return (IPPROTO_DONE);