2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_pcb.h>
43 #include <netinet/sctp_var.h>
44 #include <netinet/sctp_sysctl.h>
45 #include <netinet/sctp_timer.h>
46 #include <netinet/sctputil.h>
47 #include <netinet/sctp_output.h>
48 #include <netinet/sctp_header.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp.h>
53 #include <netinet/sctp_uio.h>
54 #if defined(INET) || defined(INET6)
55 #include <netinet/udp.h>
59 sctp_audit_retranmission_queue(struct sctp_association *asoc)
61 struct sctp_tmit_chunk *chk;
63 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n",
64 asoc->sent_queue_retran_cnt,
65 asoc->sent_queue_cnt);
66 asoc->sent_queue_retran_cnt = 0;
67 asoc->sent_queue_cnt = 0;
68 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
69 if (chk->sent == SCTP_DATAGRAM_RESEND) {
70 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
72 asoc->sent_queue_cnt++;
74 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
75 if (chk->sent == SCTP_DATAGRAM_RESEND) {
76 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
79 TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) {
80 if (chk->sent == SCTP_DATAGRAM_RESEND) {
81 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
84 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n",
85 asoc->sent_queue_retran_cnt,
86 asoc->sent_queue_cnt);
90 sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
91 struct sctp_nets *net, uint16_t threshold)
95 SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n",
96 (void *)net, net->error_count,
97 net->failure_threshold);
98 if (net->error_count > net->failure_threshold) {
99 /* We had a threshold failure */
100 if (net->dest_state & SCTP_ADDR_REACHABLE) {
101 net->dest_state &= ~SCTP_ADDR_REACHABLE;
102 net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
103 net->dest_state &= ~SCTP_ADDR_PF;
104 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
106 (void *)net, SCTP_SO_NOT_LOCKED);
108 } else if ((net->pf_threshold < net->failure_threshold) &&
109 (net->error_count > net->pf_threshold)) {
110 if (!(net->dest_state & SCTP_ADDR_PF)) {
111 net->dest_state |= SCTP_ADDR_PF;
112 net->last_active = sctp_get_tick_count();
113 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
114 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT,
116 SCTP_FROM_SCTP_TIMER + SCTP_LOC_1);
117 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net);
125 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) {
126 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
127 sctp_misc_ints(SCTP_THRESHOLD_INCR,
128 stcb->asoc.overall_error_count,
129 (stcb->asoc.overall_error_count + 1),
130 SCTP_FROM_SCTP_TIMER,
133 stcb->asoc.overall_error_count++;
136 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
137 sctp_misc_ints(SCTP_THRESHOLD_INCR,
138 stcb->asoc.overall_error_count,
139 (stcb->asoc.overall_error_count + 1),
140 SCTP_FROM_SCTP_TIMER,
143 stcb->asoc.overall_error_count++;
145 SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n",
146 (void *)&stcb->asoc, stcb->asoc.overall_error_count,
148 ((net == NULL) ? (uint32_t)0 : (uint32_t)net->dest_state));
150 * We specifically do not do >= to give the assoc one more change
153 if (stcb->asoc.overall_error_count > threshold) {
154 /* Abort notification sends a ULP notify */
157 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
158 "Association error counter exceeded");
159 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_2;
160 sctp_abort_an_association(inp, stcb, op_err, true, SCTP_SO_NOT_LOCKED);
167 * sctp_find_alternate_net() returns a non-NULL pointer as long as there
168 * exists nets, which are not being deleted.
171 sctp_find_alternate_net(struct sctp_tcb *stcb,
172 struct sctp_nets *net,
175 /* Find and return an alternate network if possible */
176 struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL;
179 /* JRS 5/14/07 - Initialize min_errors to an impossible value. */
181 uint32_t max_cwnd = 0;
183 if (stcb->asoc.numnets == 1) {
184 /* No selection can be made. */
185 return (TAILQ_FIRST(&stcb->asoc.nets));
188 * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate
189 * net algorithm. This algorithm chooses the active destination (not
190 * in PF state) with the largest cwnd value. If all destinations are
191 * in PF state, unreachable, or unconfirmed, choose the desination
192 * that is in PF state with the lowest error count. In case of a
193 * tie, choose the destination that was most recently active.
196 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
198 * JRS 5/14/07 - If the destination is unreachable
199 * or unconfirmed, skip it.
201 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
202 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
206 * JRS 5/14/07 - If the destination is reachable
207 * but in PF state, compare the error count of the
208 * destination to the minimum error count seen thus
209 * far. Store the destination with the lower error
210 * count. If the error counts are equal, store the
211 * destination that was most recently active.
213 if (mnet->dest_state & SCTP_ADDR_PF) {
215 * JRS 5/14/07 - If the destination under
216 * consideration is the current destination,
217 * work as if the error count is one higher.
218 * The actual error count will not be
219 * incremented until later in the t3
223 if (min_errors == -1) {
224 min_errors = mnet->error_count + 1;
225 min_errors_net = mnet;
226 } else if (mnet->error_count + 1 < min_errors) {
227 min_errors = mnet->error_count + 1;
228 min_errors_net = mnet;
229 } else if (mnet->error_count + 1 == min_errors
230 && mnet->last_active > min_errors_net->last_active) {
231 min_errors_net = mnet;
232 min_errors = mnet->error_count + 1;
236 if (min_errors == -1) {
237 min_errors = mnet->error_count;
238 min_errors_net = mnet;
239 } else if (mnet->error_count < min_errors) {
240 min_errors = mnet->error_count;
241 min_errors_net = mnet;
242 } else if (mnet->error_count == min_errors
243 && mnet->last_active > min_errors_net->last_active) {
244 min_errors_net = mnet;
245 min_errors = mnet->error_count;
251 * JRS 5/14/07 - If the destination is reachable and
252 * not in PF state, compare the cwnd of the
253 * destination to the highest cwnd seen thus far.
254 * Store the destination with the higher cwnd value.
255 * If the cwnd values are equal, randomly choose one
256 * of the two destinations.
258 if (max_cwnd < mnet->cwnd) {
260 max_cwnd = mnet->cwnd;
261 } else if (max_cwnd == mnet->cwnd) {
265 if (stcb->asoc.hb_random_idx > 3) {
266 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
267 memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values));
268 this_random = stcb->asoc.hb_random_values[0];
269 stcb->asoc.hb_random_idx++;
270 stcb->asoc.hb_ect_randombit = 0;
272 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
273 stcb->asoc.hb_random_idx++;
274 stcb->asoc.hb_ect_randombit = 0;
276 if (this_random % 2 == 1) {
278 max_cwnd = mnet->cwnd; /* Useless? */
282 if (max_cwnd_net == NULL) {
283 if (min_errors_net == NULL) {
286 return (min_errors_net);
288 return (max_cwnd_net);
290 } /* JRS 5/14/07 - If mode is set to 1, use the
291 * CMT policy for choosing an alternate net. */
292 else if (mode == 1) {
293 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
294 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
295 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
297 * will skip ones that are not-reachable or
302 if (max_cwnd < mnet->cwnd) {
304 max_cwnd = mnet->cwnd;
305 } else if (max_cwnd == mnet->cwnd) {
309 if (stcb->asoc.hb_random_idx > 3) {
310 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
311 memcpy(stcb->asoc.hb_random_values, &rndval,
312 sizeof(stcb->asoc.hb_random_values));
313 this_random = stcb->asoc.hb_random_values[0];
314 stcb->asoc.hb_random_idx = 0;
315 stcb->asoc.hb_ect_randombit = 0;
317 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
318 stcb->asoc.hb_random_idx++;
319 stcb->asoc.hb_ect_randombit = 0;
321 if (this_random % 2) {
323 max_cwnd = mnet->cwnd;
328 return (max_cwnd_net);
331 /* Look for an alternate net, which is active. */
332 if ((net != NULL) && ((net->dest_state & SCTP_ADDR_BEING_DELETED) == 0)) {
333 alt = TAILQ_NEXT(net, sctp_next);
335 alt = TAILQ_FIRST(&stcb->asoc.nets);
341 alt = TAILQ_FIRST(&stcb->asoc.nets);
344 /* Definitely out of candidates. */
349 if (alt->ro.ro_nh == NULL) {
350 if (alt->ro._s_addr) {
351 sctp_free_ifa(alt->ro._s_addr);
352 alt->ro._s_addr = NULL;
354 alt->src_addr_selected = 0;
356 if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
357 (alt->ro.ro_nh != NULL) &&
358 (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
360 /* Found an alternate net, which is reachable. */
363 alt = TAILQ_NEXT(alt, sctp_next);
368 * In case no active alternate net has been found, look for
369 * an alternate net, which is confirmed.
371 if ((net != NULL) && ((net->dest_state & SCTP_ADDR_BEING_DELETED) == 0)) {
372 alt = TAILQ_NEXT(net, sctp_next);
374 alt = TAILQ_FIRST(&stcb->asoc.nets);
380 alt = TAILQ_FIRST(&stcb->asoc.nets);
383 /* Definitely out of candidates. */
388 if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
391 * Found an alternate net, which is
396 alt = TAILQ_NEXT(alt, sctp_next);
401 * In case no confirmed alternate net has been found, just
402 * return net, if it is not being deleted. In the other case
403 * just return the first net.
405 if ((net != NULL) && ((net->dest_state & SCTP_ADDR_BEING_DELETED) == 0)) {
409 alt = TAILQ_FIRST(&stcb->asoc.nets);
416 sctp_backoff_on_timeout(struct sctp_tcb *stcb,
417 struct sctp_nets *net,
419 int num_marked, int num_abandoned)
422 if (net->RTO_measured) {
423 net->RTO = stcb->asoc.minrto;
425 net->RTO = stcb->asoc.initial_rto;
429 if (net->RTO > stcb->asoc.maxrto) {
430 net->RTO = stcb->asoc.maxrto;
432 if ((win_probe == 0) && (num_marked || num_abandoned)) {
433 /* We don't apply penalty to window probe scenarios */
434 /* JRS - Use the congestion control given in the CC module */
435 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net);
441 sctp_recover_sent_list(struct sctp_tcb *stcb)
443 struct sctp_tmit_chunk *chk, *nchk;
444 struct sctp_association *asoc;
447 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
448 if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.tsn)) {
449 SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n",
450 (void *)chk, chk->rec.data.tsn, asoc->last_acked_seq);
451 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
452 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
453 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
456 if ((asoc->strmout[chk->rec.data.sid].chunks_on_queues == 0) &&
457 (asoc->strmout[chk->rec.data.sid].state == SCTP_STREAM_RESET_PENDING) &&
458 TAILQ_EMPTY(&asoc->strmout[chk->rec.data.sid].outqueue)) {
459 asoc->trigger_reset = 1;
461 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
462 if (PR_SCTP_ENABLED(chk->flags)) {
463 if (asoc->pr_sctp_cnt != 0)
467 /* sa_ignore NO_NULL_CHK */
468 sctp_free_bufspace(stcb, asoc, chk, 1);
469 sctp_m_freem(chk->data);
471 if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) {
472 asoc->sent_queue_cnt_removeable--;
475 asoc->sent_queue_cnt--;
476 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
479 SCTP_PRINTF("after recover order is as follows\n");
480 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
481 SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.tsn);
487 sctp_mark_all_for_resend(struct sctp_tcb *stcb,
488 struct sctp_nets *net,
489 struct sctp_nets *alt,
496 * Mark all chunks (well not all) that were sent to *net for
497 * retransmission. Move them to alt for there destination as well...
498 * We only mark chunks that have been outstanding long enough to
499 * have received feed-back.
501 struct sctp_tmit_chunk *chk, *nchk;
502 struct sctp_nets *lnets;
503 struct timeval now, min_wait, tv;
506 int audit_tf, num_mk, fir;
508 uint32_t orig_flight, orig_tf;
509 uint32_t tsnlast, tsnfirst;
510 int recovery_cnt = 0;
512 /* none in flight now */
516 * figure out how long a data chunk must be pending before we can
519 (void)SCTP_GETTIME_TIMEVAL(&now);
520 /* get cur rto in micro-seconds */
521 cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
523 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
525 stcb->asoc.peers_rwnd,
527 SCTP_FR_T3_MARK_TIME);
528 sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT);
529 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
531 tv.tv_sec = cur_rto / 1000000;
532 tv.tv_usec = cur_rto % 1000000;
534 timevalsub(&min_wait, &tv);
535 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
537 * if we hit here, we don't have enough seconds on the clock
538 * to account for the RTO. We just let the lower seconds be
539 * the bounds and don't worry about it. This may mean we
540 * will mark a lot more than we should.
542 min_wait.tv_sec = min_wait.tv_usec = 0;
544 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
545 sctp_log_fr(cur_rto, (uint32_t)now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
546 sctp_log_fr(0, (uint32_t)min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
549 * Our rwnd will be incorrect here since we are not adding back the
550 * cnt * mbuf but we will fix that down below.
552 orig_flight = net->flight_size;
553 orig_tf = stcb->asoc.total_flight;
555 net->fast_retran_ip = 0;
556 /* Now on to each chunk */
559 tsnfirst = tsnlast = 0;
563 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) {
564 if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.tsn)) {
565 /* Strange case our list got out of order? */
566 SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n",
567 (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.tsn);
570 panic("last acked >= chk on sent-Q");
572 SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
573 sctp_recover_sent_list(stcb);
574 if (recovery_cnt < 10) {
577 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
581 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
583 * found one to mark: If it is less than
584 * DATAGRAM_ACKED it MUST not be a skipped or marked
585 * TSN but instead one that is either already set
586 * for retransmission OR one that needs
590 /* validate its been outstanding long enough */
591 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
592 sctp_log_fr(chk->rec.data.tsn,
593 (uint32_t)chk->sent_rcv_time.tv_sec,
594 chk->sent_rcv_time.tv_usec,
595 SCTP_FR_T3_MARK_TIME);
597 if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
599 * we have reached a chunk that was sent
600 * some seconds past our min.. forget it we
601 * will find no more to send.
603 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
605 (uint32_t)chk->sent_rcv_time.tv_sec,
606 chk->sent_rcv_time.tv_usec,
610 } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
611 (window_probe == 0)) {
613 * we must look at the micro seconds to
616 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
618 * ok it was sent after our boundary
624 if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) {
626 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
629 (void)sctp_release_pr_sctp_chunk(stcb,
638 if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) {
639 /* Has it been retransmitted tv_sec times? */
640 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) {
642 (void)sctp_release_pr_sctp_chunk(stcb,
651 if (chk->sent < SCTP_DATAGRAM_RESEND) {
652 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
656 tsnfirst = chk->rec.data.tsn;
658 tsnlast = chk->rec.data.tsn;
659 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
660 sctp_log_fr(chk->rec.data.tsn, chk->snd_count,
661 0, SCTP_FR_T3_MARKED);
664 if (chk->rec.data.chunk_was_revoked) {
665 /* deflate the cwnd */
666 chk->whoTo->cwnd -= chk->book_size;
667 chk->rec.data.chunk_was_revoked = 0;
669 net->marked_retrans++;
670 stcb->asoc.marked_retrans++;
671 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
672 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO,
673 chk->whoTo->flight_size,
675 (uint32_t)(uintptr_t)chk->whoTo,
678 sctp_flight_size_decrease(chk);
679 sctp_total_flight_decrease(stcb, chk);
680 stcb->asoc.peers_rwnd += chk->send_size;
681 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
683 chk->sent = SCTP_DATAGRAM_RESEND;
684 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
685 SCTP_STAT_INCR(sctps_markedretrans);
687 /* reset the TSN for striking and other FR stuff */
688 chk->rec.data.doing_fast_retransmit = 0;
689 /* Clear any time so NO RTT is being done */
692 if (chk->whoTo->rto_needed == 0) {
693 chk->whoTo->rto_needed = 1;
698 sctp_free_remote_addr(chk->whoTo);
699 chk->no_fr_allowed = 1;
701 atomic_add_int(&alt->ref_count, 1);
703 chk->no_fr_allowed = 0;
704 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
705 chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
707 chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
711 * CMT: Do not allow FRs on retransmitted TSNs.
713 if (stcb->asoc.sctp_cmt_on_off > 0) {
714 chk->no_fr_allowed = 1;
716 #ifdef THIS_SHOULD_NOT_BE_DONE
717 } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
718 /* remember highest acked one */
722 if (chk->sent == SCTP_DATAGRAM_RESEND) {
726 if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
727 /* we did not subtract the same things? */
731 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
732 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
736 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
738 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%u\n",
740 stcb->asoc.peers_rwnd);
743 *num_marked = num_mk;
744 *num_abandoned = cnt_abandoned;
746 * Now check for a ECN Echo that may be stranded And include the
747 * cnt_mk'd to have all resends in the control queue.
749 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
750 if (chk->sent == SCTP_DATAGRAM_RESEND) {
753 if ((chk->whoTo == net) &&
754 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
755 sctp_free_remote_addr(chk->whoTo);
757 if (chk->sent != SCTP_DATAGRAM_RESEND) {
758 chk->sent = SCTP_DATAGRAM_RESEND;
759 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
760 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
763 atomic_add_int(&alt->ref_count, 1);
766 #ifdef THIS_SHOULD_NOT_BE_DONE
767 if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) {
768 /* fix it so we retransmit the highest acked anyway */
769 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
771 could_be_sent->sent = SCTP_DATAGRAM_RESEND;
774 if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
776 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n",
777 cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk);
779 #ifndef SCTP_AUDITING_ENABLED
780 stcb->asoc.sent_queue_retran_cnt = cnt_mk;
784 SCTPDBG(SCTP_DEBUG_TIMER4,
785 "Audit total flight due to negative value net:%p\n",
787 stcb->asoc.total_flight = 0;
788 stcb->asoc.total_flight_count = 0;
789 /* Clear all networks flight size */
790 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) {
791 lnets->flight_size = 0;
792 SCTPDBG(SCTP_DEBUG_TIMER4,
793 "Net:%p c-f cwnd:%d ssthresh:%d\n",
794 (void *)lnets, lnets->cwnd, lnets->ssthresh);
796 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
797 if (chk->sent < SCTP_DATAGRAM_RESEND) {
798 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
799 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
800 chk->whoTo->flight_size,
802 (uint32_t)(uintptr_t)chk->whoTo,
806 sctp_flight_size_increase(chk);
807 sctp_total_flight_increase(stcb, chk);
811 /* We return 1 if we only have a window probe outstanding */
816 sctp_t3rxt_timer(struct sctp_inpcb *inp,
817 struct sctp_tcb *stcb,
818 struct sctp_nets *net)
820 struct sctp_nets *alt;
821 int win_probe, num_mk, num_abandoned;
823 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
824 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
826 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
827 struct sctp_nets *lnet;
829 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
831 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
833 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
837 /* Find an alternate and mark those for retransmission */
838 if ((stcb->asoc.peers_rwnd == 0) &&
839 (stcb->asoc.total_flight < net->mtu)) {
840 SCTP_STAT_INCR(sctps_timowindowprobe);
846 if (win_probe == 0) {
847 /* We don't do normal threshold management on window probes */
848 if (sctp_threshold_management(inp, stcb, net,
849 stcb->asoc.max_send_times)) {
850 /* Association was destroyed */
853 if (net != stcb->asoc.primary_destination) {
854 /* send a immediate HB if our RTO is stale */
858 (void)SCTP_GETTIME_TIMEVAL(&now);
859 if (net->last_sent_time.tv_sec) {
860 ms_goneby = (uint32_t)(now.tv_sec - net->last_sent_time.tv_sec) * 1000;
864 if ((net->dest_state & SCTP_ADDR_PF) == 0) {
865 if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
867 * no recent feed back in an
868 * RTO or more, request a
871 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
878 * For a window probe we don't penalize the net's but only
879 * the association. This may fail it if SACKs are not coming
880 * back. If sack's are coming with rwnd locked at 0, we will
881 * continue to hold things waiting for rwnd to raise
883 if (sctp_threshold_management(inp, stcb, NULL,
884 stcb->asoc.max_send_times)) {
885 /* Association was destroyed */
889 if (stcb->asoc.sctp_cmt_on_off > 0) {
890 if (net->pf_threshold < net->failure_threshold) {
891 alt = sctp_find_alternate_net(stcb, net, 2);
894 * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is
895 * being used, then pick dest with largest ssthresh
896 * for any retransmission.
898 alt = sctp_find_alternate_net(stcb, net, 1);
900 * CUCv2: If a different dest is picked for the
901 * retransmission, then new (rtx-)pseudo_cumack
902 * needs to be tracked for orig dest. Let CUCv2
903 * track new (rtx-) pseudo-cumack always.
905 net->find_pseudo_cumack = 1;
906 net->find_rtx_pseudo_cumack = 1;
909 alt = sctp_find_alternate_net(stcb, net, 0);
914 (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe,
915 &num_mk, &num_abandoned);
916 /* FR Loss recovery just ended with the T3. */
917 stcb->asoc.fast_retran_loss_recovery = 0;
919 /* CMT FR loss recovery ended with the T3 */
920 net->fast_retran_loss_recovery = 0;
921 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
922 (net->flight_size == 0)) {
923 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
927 * setup the sat loss recovery that prevents satellite cwnd advance.
929 stcb->asoc.sat_t3_loss_recovery = 1;
930 stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
932 /* Backoff the timer and cwnd */
933 sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned);
934 if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
935 (net->dest_state & SCTP_ADDR_PF)) {
936 /* Move all pending over too */
937 sctp_move_chunks_from_net(stcb, net);
940 * Get the address that failed, to force a new src address
941 * selecton and a route allocation.
943 if (net->ro._s_addr) {
944 sctp_free_ifa(net->ro._s_addr);
945 net->ro._s_addr = NULL;
947 net->src_addr_selected = 0;
949 /* Force a route allocation too */
952 /* Was it our primary? */
953 if ((stcb->asoc.primary_destination == net) && (alt != net)) {
955 * Yes, note it as such and find an alternate note:
956 * this means HB code must use this to resent the
957 * primary if it goes active AND if someone does a
958 * change-primary then this flag must be cleared
959 * from any net structures.
961 if (stcb->asoc.alternate) {
962 sctp_free_remote_addr(stcb->asoc.alternate);
964 stcb->asoc.alternate = alt;
965 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
969 * Special case for cookie-echo'ed case, we don't do output but must
970 * await the COOKIE-ACK before retransmission
972 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
974 * Here we just reset the timer and start again since we
975 * have not established the asoc
977 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
980 if (stcb->asoc.prsctp_supported) {
981 struct sctp_tmit_chunk *lchk;
983 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc);
984 /* C3. See if we need to send a Fwd-TSN */
985 if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) {
986 send_forward_tsn(stcb, &stcb->asoc);
987 for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) {
988 if (lchk->whoTo != NULL) {
993 /* Assure a timer is up */
994 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
998 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) {
999 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
1005 sctp_t1init_timer(struct sctp_inpcb *inp,
1006 struct sctp_tcb *stcb,
1007 struct sctp_nets *net)
1009 /* bump the thresholds */
1010 if (stcb->asoc.delayed_connection) {
1012 * special hook for delayed connection. The library did NOT
1013 * complete the rest of its sends.
1015 stcb->asoc.delayed_connection = 0;
1016 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1019 if (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) {
1022 if (sctp_threshold_management(inp, stcb, net,
1023 stcb->asoc.max_init_times)) {
1024 /* Association was destroyed */
1027 stcb->asoc.dropped_special_cnt = 0;
1028 sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0);
1029 if (stcb->asoc.initial_init_rto_max < net->RTO) {
1030 net->RTO = stcb->asoc.initial_init_rto_max;
1032 if (stcb->asoc.numnets > 1) {
1033 /* If we have more than one addr use it */
1034 struct sctp_nets *alt;
1036 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0);
1037 if (alt != stcb->asoc.primary_destination) {
1038 sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination);
1039 stcb->asoc.primary_destination = alt;
1042 /* Send out a new init */
1043 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1048 * For cookie and asconf we actually need to find and mark for resend, then
1049 * increment the resend counter (after all the threshold management stuff of
1053 sctp_cookie_timer(struct sctp_inpcb *inp,
1054 struct sctp_tcb *stcb,
1055 struct sctp_nets *net SCTP_UNUSED)
1057 struct sctp_nets *alt;
1058 struct sctp_tmit_chunk *cookie;
1060 /* first before all else we must find the cookie */
1061 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) {
1062 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
1066 if (cookie == NULL) {
1067 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
1069 struct mbuf *op_err;
1071 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1072 "Cookie timer expired, but no cookie");
1073 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3;
1074 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
1077 panic("Cookie timer expires in wrong state?");
1079 SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(stcb));
1085 /* Ok we found the cookie, threshold management next */
1086 if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1087 stcb->asoc.max_init_times)) {
1092 * Cleared threshold management, now lets backoff the address and
1093 * select an alternate
1095 stcb->asoc.dropped_special_cnt = 0;
1096 sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0);
1097 alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0);
1098 if (alt != cookie->whoTo) {
1099 sctp_free_remote_addr(cookie->whoTo);
1100 cookie->whoTo = alt;
1101 atomic_add_int(&alt->ref_count, 1);
1103 /* Now mark the retran info */
1104 if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1105 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1107 cookie->sent = SCTP_DATAGRAM_RESEND;
1108 cookie->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1110 * Now call the output routine to kick out the cookie again, Note we
1111 * don't mark any chunks for retran so that FR will need to kick in
1112 * to move these (or a send timer).
1118 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1120 struct sctp_nets *alt, *net;
1121 struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1123 if (stcb->asoc.stream_reset_outstanding == 0) {
1126 /* find the existing STRRESET, we use the seq number we sent out on */
1127 (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
1128 if (strrst == NULL) {
1131 net = strrst->whoTo;
1132 /* do threshold management */
1133 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1138 * Cleared threshold management, now lets backoff the address and
1139 * select an alternate
1141 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1142 alt = sctp_find_alternate_net(stcb, net, 0);
1143 strrst->whoTo = alt;
1144 atomic_add_int(&alt->ref_count, 1);
1146 /* See if a ECN Echo is also stranded */
1147 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1148 if ((chk->whoTo == net) &&
1149 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1150 sctp_free_remote_addr(chk->whoTo);
1151 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1152 chk->sent = SCTP_DATAGRAM_RESEND;
1153 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1154 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1157 atomic_add_int(&alt->ref_count, 1);
1160 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1162 * If the address went un-reachable, we need to move to
1163 * alternates for ALL chk's in queue
1165 sctp_move_chunks_from_net(stcb, net);
1167 sctp_free_remote_addr(net);
1169 /* mark the retran info */
1170 if (strrst->sent != SCTP_DATAGRAM_RESEND)
1171 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1172 strrst->sent = SCTP_DATAGRAM_RESEND;
1173 strrst->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1175 /* restart the timer */
1176 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, alt);
1181 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1182 struct sctp_nets *net)
1184 struct sctp_nets *alt;
1185 struct sctp_tmit_chunk *asconf, *chk;
1187 /* is this a first send, or a retransmission? */
1188 if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) {
1189 /* compose a new ASCONF chunk and send it */
1190 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1193 * Retransmission of the existing ASCONF is needed
1196 /* find the existing ASCONF */
1197 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1198 if (asconf == NULL) {
1201 net = asconf->whoTo;
1202 /* do threshold management */
1203 if (sctp_threshold_management(inp, stcb, net,
1204 stcb->asoc.max_send_times)) {
1208 if (asconf->snd_count > stcb->asoc.max_send_times) {
1210 * Something is rotten: our peer is not responding
1211 * to ASCONFs but apparently is to other chunks.
1212 * i.e. it is not properly handling the chunk type
1213 * upper bits. Mark this peer as ASCONF incapable
1216 SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1217 sctp_asconf_cleanup(stcb);
1221 * cleared threshold management, so now backoff the net and
1222 * select an alternate
1224 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1225 alt = sctp_find_alternate_net(stcb, net, 0);
1226 if (asconf->whoTo != alt) {
1227 asconf->whoTo = alt;
1228 atomic_add_int(&alt->ref_count, 1);
1231 /* See if an ECN Echo is also stranded */
1232 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1233 if ((chk->whoTo == net) &&
1234 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1235 sctp_free_remote_addr(chk->whoTo);
1237 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1238 chk->sent = SCTP_DATAGRAM_RESEND;
1239 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1240 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1242 atomic_add_int(&alt->ref_count, 1);
1245 TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1246 if (chk->whoTo != alt) {
1247 sctp_free_remote_addr(chk->whoTo);
1249 atomic_add_int(&alt->ref_count, 1);
1251 if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT)
1252 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1253 chk->sent = SCTP_DATAGRAM_RESEND;
1254 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1256 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1258 * If the address went un-reachable, we need to move
1259 * to the alternate for ALL chunks in queue
1261 sctp_move_chunks_from_net(stcb, net);
1263 sctp_free_remote_addr(net);
1265 /* mark the retran info */
1266 if (asconf->sent != SCTP_DATAGRAM_RESEND)
1267 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1268 asconf->sent = SCTP_DATAGRAM_RESEND;
1269 asconf->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1271 /* send another ASCONF if any and we can do */
1272 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1277 /* Mobility adaptation */
1279 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1281 if (stcb->asoc.deleted_primary == NULL) {
1282 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n");
1283 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1286 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary ");
1287 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1288 sctp_free_remote_addr(stcb->asoc.deleted_primary);
1289 stcb->asoc.deleted_primary = NULL;
1290 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1295 * For the shutdown and shutdown-ack, we do not keep one around on the
1296 * control queue. This means we must generate a new one and call the general
1297 * chunk output routine, AFTER having done threshold management.
1298 * It is assumed that net is non-NULL.
1301 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1302 struct sctp_nets *net)
1304 struct sctp_nets *alt;
1306 /* first threshold management */
1307 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1311 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1312 /* second select an alternative */
1313 alt = sctp_find_alternate_net(stcb, net, 0);
1315 /* third generate a shutdown into the queue for out net */
1316 sctp_send_shutdown(stcb, alt);
1318 /* fourth restart timer */
1319 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1324 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1325 struct sctp_nets *net)
1327 struct sctp_nets *alt;
1329 /* first threshold management */
1330 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1334 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1335 /* second select an alternative */
1336 alt = sctp_find_alternate_net(stcb, net, 0);
1338 /* third generate a shutdown into the queue for out net */
1339 sctp_send_shutdown_ack(stcb, alt);
1341 /* fourth restart timer */
1342 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1347 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1349 struct sctp_stream_queue_pending *sp;
1350 unsigned int i, chks_in_queue = 0;
1351 int being_filled = 0;
1353 KASSERT(inp != NULL, ("inp is NULL"));
1354 KASSERT(stcb != NULL, ("stcb is NULL"));
1355 SCTP_TCB_LOCK_ASSERT(stcb);
1356 KASSERT(TAILQ_EMPTY(&stcb->asoc.send_queue), ("send_queue not empty"));
1357 KASSERT(TAILQ_EMPTY(&stcb->asoc.sent_queue), ("sent_queue not empty"));
1359 if (stcb->asoc.sent_queue_retran_cnt) {
1360 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n",
1361 stcb->asoc.sent_queue_retran_cnt);
1362 stcb->asoc.sent_queue_retran_cnt = 0;
1364 if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1365 /* No stream scheduler information, initialize scheduler */
1366 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc);
1367 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1368 /* yep, we lost a stream or two */
1369 SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n");
1371 /* no streams lost */
1372 stcb->asoc.total_output_queue_size = 0;
1375 /* Check to see if some data queued, if so report it */
1376 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1377 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
1378 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
1379 if (sp->msg_is_complete)
1385 if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
1386 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n",
1387 stcb->asoc.stream_queue_cnt, chks_in_queue);
1389 if (chks_in_queue) {
1390 /* call the output queue function */
1391 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1392 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1393 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1395 * Probably should go in and make it go back through
1396 * and add fragments allowed
1398 if (being_filled == 0) {
1399 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1404 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n",
1405 (u_long)stcb->asoc.total_output_queue_size);
1406 stcb->asoc.total_output_queue_size = 0;
1411 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1412 struct sctp_nets *net)
1416 if (net->dest_state & SCTP_ADDR_PF) {
1421 if (net->hb_responded == 0) {
1422 if (net->ro._s_addr) {
1424 * Invalidate the src address if we did not get a
1425 * response last time.
1427 sctp_free_ifa(net->ro._s_addr);
1428 net->ro._s_addr = NULL;
1429 net->src_addr_selected = 0;
1431 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1432 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1437 /* Zero PBA, if it needs it */
1438 if (net->partial_bytes_acked) {
1439 net->partial_bytes_acked = 0;
1441 if ((stcb->asoc.total_output_queue_size > 0) &&
1442 (TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1443 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1444 sctp_audit_stream_queues_for_size(inp, stcb);
1446 if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1447 !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1449 * when move to PF during threshold mangement, a HB has been
1450 * queued in that routine
1452 uint32_t ms_gone_by;
1454 if ((net->last_sent_time.tv_sec > 0) ||
1455 (net->last_sent_time.tv_usec > 0)) {
1456 struct timeval diff;
1458 SCTP_GETTIME_TIMEVAL(&diff);
1459 timevalsub(&diff, &net->last_sent_time);
1460 ms_gone_by = (uint32_t)(diff.tv_sec * 1000) +
1461 (uint32_t)(diff.tv_usec / 1000);
1463 ms_gone_by = 0xffffffff;
1465 if ((ms_gone_by >= net->heart_beat_delay) ||
1466 (net->dest_state & SCTP_ADDR_PF)) {
1467 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1474 sctp_pathmtu_timer(struct sctp_inpcb *inp,
1475 struct sctp_tcb *stcb,
1476 struct sctp_nets *net)
1478 uint32_t next_mtu, mtu;
1480 next_mtu = sctp_get_next_mtu(net->mtu);
1482 if ((next_mtu > net->mtu) && (net->port == 0)) {
1483 if ((net->src_addr_selected == 0) ||
1484 (net->ro._s_addr == NULL) ||
1485 (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1486 if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1487 sctp_free_ifa(net->ro._s_addr);
1488 net->ro._s_addr = NULL;
1489 net->src_addr_selected = 0;
1490 } else if (net->ro._s_addr == NULL) {
1491 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1492 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1493 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1495 /* KAME hack: embed scopeid */
1496 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1500 net->ro._s_addr = sctp_source_address_selection(inp,
1502 (sctp_route_t *)&net->ro,
1503 net, 0, stcb->asoc.vrf_id);
1504 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1505 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1506 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1508 (void)sa6_recoverscope(sin6);
1512 if (net->ro._s_addr)
1513 net->src_addr_selected = 1;
1515 if (net->ro._s_addr) {
1516 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_nh);
1517 #if defined(INET) || defined(INET6)
1519 mtu -= sizeof(struct udphdr);
1522 if (mtu > next_mtu) {
1523 net->mtu = next_mtu;
1529 /* restart the timer */
1530 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1534 sctp_autoclose_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1536 struct timeval tn, *tim_touse;
1537 struct sctp_association *asoc;
1538 uint32_t ticks_gone_by;
1540 (void)SCTP_GETTIME_TIMEVAL(&tn);
1541 if (stcb->asoc.sctp_autoclose_ticks > 0 &&
1542 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1543 /* Auto close is on */
1545 /* pick the time to use */
1546 if (asoc->time_last_rcvd.tv_sec >
1547 asoc->time_last_sent.tv_sec) {
1548 tim_touse = &asoc->time_last_rcvd;
1550 tim_touse = &asoc->time_last_sent;
1552 /* Now has long enough transpired to autoclose? */
1553 ticks_gone_by = sctp_secs_to_ticks((uint32_t)(tn.tv_sec - tim_touse->tv_sec));
1554 if (ticks_gone_by >= asoc->sctp_autoclose_ticks) {
1556 * autoclose time has hit, call the output routine,
1557 * which should do nothing just to be SURE we don't
1558 * have hanging data. We can then safely check the
1559 * queues and know that we are clear to send
1562 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1564 if (TAILQ_EMPTY(&asoc->send_queue) &&
1565 TAILQ_EMPTY(&asoc->sent_queue)) {
1567 * there is nothing queued to send, so I'm
1570 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1571 /* only send SHUTDOWN 1st time thru */
1572 struct sctp_nets *net;
1574 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
1575 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1576 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1578 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
1579 sctp_stop_timers_for_shutdown(stcb);
1580 if (stcb->asoc.alternate) {
1581 net = stcb->asoc.alternate;
1583 net = stcb->asoc.primary_destination;
1585 sctp_send_shutdown(stcb, net);
1586 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1587 stcb->sctp_ep, stcb, net);
1588 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1589 stcb->sctp_ep, stcb, NULL);
1594 * No auto close at this time, reset t-o to check
1599 /* fool the timer startup to use the time left */
1600 tmp = asoc->sctp_autoclose_ticks;
1601 asoc->sctp_autoclose_ticks -= ticks_gone_by;
1602 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1603 /* restore the real tick value */
1604 asoc->sctp_autoclose_ticks = tmp;