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, SCTP_SO_NOT_LOCKED);
167 * sctp_find_alternate_net() returns a non-NULL pointer as long
168 * the argument net is non-NULL.
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 others but net */
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);
335 mnet = TAILQ_FIRST(&stcb->asoc.nets);
341 alt = TAILQ_NEXT(mnet, sctp_next);
347 alt = TAILQ_FIRST(&stcb->asoc.nets);
352 if (alt->ro.ro_nh == NULL) {
353 if (alt->ro._s_addr) {
354 sctp_free_ifa(alt->ro._s_addr);
355 alt->ro._s_addr = NULL;
357 alt->src_addr_selected = 0;
359 if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
360 (alt->ro.ro_nh != NULL) &&
361 (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) {
362 /* Found a reachable address */
369 /* Case where NO insv network exists (dormant state) */
370 /* we rotate destinations */
375 return (TAILQ_FIRST(&stcb->asoc.nets));
377 alt = TAILQ_NEXT(mnet, sctp_next);
383 alt = TAILQ_FIRST(&stcb->asoc.nets);
388 if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
390 /* Found an alternate address */
403 sctp_backoff_on_timeout(struct sctp_tcb *stcb,
404 struct sctp_nets *net,
406 int num_marked, int num_abandoned)
409 if (net->RTO_measured) {
410 net->RTO = stcb->asoc.minrto;
412 net->RTO = stcb->asoc.initial_rto;
416 if (net->RTO > stcb->asoc.maxrto) {
417 net->RTO = stcb->asoc.maxrto;
419 if ((win_probe == 0) && (num_marked || num_abandoned)) {
420 /* We don't apply penalty to window probe scenarios */
421 /* JRS - Use the congestion control given in the CC module */
422 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net);
428 sctp_recover_sent_list(struct sctp_tcb *stcb)
430 struct sctp_tmit_chunk *chk, *nchk;
431 struct sctp_association *asoc;
434 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
435 if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.tsn)) {
436 SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n",
437 (void *)chk, chk->rec.data.tsn, asoc->last_acked_seq);
438 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
439 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
440 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
443 if ((asoc->strmout[chk->rec.data.sid].chunks_on_queues == 0) &&
444 (asoc->strmout[chk->rec.data.sid].state == SCTP_STREAM_RESET_PENDING) &&
445 TAILQ_EMPTY(&asoc->strmout[chk->rec.data.sid].outqueue)) {
446 asoc->trigger_reset = 1;
448 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
449 if (PR_SCTP_ENABLED(chk->flags)) {
450 if (asoc->pr_sctp_cnt != 0)
454 /* sa_ignore NO_NULL_CHK */
455 sctp_free_bufspace(stcb, asoc, chk, 1);
456 sctp_m_freem(chk->data);
458 if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) {
459 asoc->sent_queue_cnt_removeable--;
462 asoc->sent_queue_cnt--;
463 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
466 SCTP_PRINTF("after recover order is as follows\n");
467 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
468 SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.tsn);
474 sctp_mark_all_for_resend(struct sctp_tcb *stcb,
475 struct sctp_nets *net,
476 struct sctp_nets *alt,
483 * Mark all chunks (well not all) that were sent to *net for
484 * retransmission. Move them to alt for there destination as well...
485 * We only mark chunks that have been outstanding long enough to
486 * have received feed-back.
488 struct sctp_tmit_chunk *chk, *nchk;
489 struct sctp_nets *lnets;
490 struct timeval now, min_wait, tv;
493 int audit_tf, num_mk, fir;
495 uint32_t orig_flight, orig_tf;
496 uint32_t tsnlast, tsnfirst;
497 int recovery_cnt = 0;
500 /* none in flight now */
504 * figure out how long a data chunk must be pending before we can
507 (void)SCTP_GETTIME_TIMEVAL(&now);
508 /* get cur rto in micro-seconds */
509 cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
511 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
513 stcb->asoc.peers_rwnd,
515 SCTP_FR_T3_MARK_TIME);
516 sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT);
517 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
519 tv.tv_sec = cur_rto / 1000000;
520 tv.tv_usec = cur_rto % 1000000;
522 timevalsub(&min_wait, &tv);
523 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
525 * if we hit here, we don't have enough seconds on the clock
526 * to account for the RTO. We just let the lower seconds be
527 * the bounds and don't worry about it. This may mean we
528 * will mark a lot more than we should.
530 min_wait.tv_sec = min_wait.tv_usec = 0;
532 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
533 sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
534 sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
537 * Our rwnd will be incorrect here since we are not adding back the
538 * cnt * mbuf but we will fix that down below.
540 orig_flight = net->flight_size;
541 orig_tf = stcb->asoc.total_flight;
543 net->fast_retran_ip = 0;
544 /* Now on to each chunk */
547 tsnfirst = tsnlast = 0;
551 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) {
552 if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.tsn)) {
553 /* Strange case our list got out of order? */
554 SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n",
555 (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.tsn);
558 panic("last acked >= chk on sent-Q");
560 SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
561 sctp_recover_sent_list(stcb);
562 if (recovery_cnt < 10) {
565 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
569 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
571 * found one to mark: If it is less than
572 * DATAGRAM_ACKED it MUST not be a skipped or marked
573 * TSN but instead one that is either already set
574 * for retransmission OR one that needs
578 /* validate its been outstanding long enough */
579 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
580 sctp_log_fr(chk->rec.data.tsn,
581 chk->sent_rcv_time.tv_sec,
582 chk->sent_rcv_time.tv_usec,
583 SCTP_FR_T3_MARK_TIME);
585 if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
587 * we have reached a chunk that was sent
588 * some seconds past our min.. forget it we
589 * will find no more to send.
591 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
593 chk->sent_rcv_time.tv_sec,
594 chk->sent_rcv_time.tv_usec,
598 } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
599 (window_probe == 0)) {
601 * we must look at the micro seconds to
604 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
606 * ok it was sent after our boundary
612 if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) {
614 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
617 (void)sctp_release_pr_sctp_chunk(stcb,
626 if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) {
627 /* Has it been retransmitted tv_sec times? */
628 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) {
630 (void)sctp_release_pr_sctp_chunk(stcb,
639 if (chk->sent < SCTP_DATAGRAM_RESEND) {
640 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
644 tsnfirst = chk->rec.data.tsn;
646 tsnlast = chk->rec.data.tsn;
647 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
648 sctp_log_fr(chk->rec.data.tsn, chk->snd_count,
649 0, SCTP_FR_T3_MARKED);
652 if (chk->rec.data.chunk_was_revoked) {
653 /* deflate the cwnd */
654 chk->whoTo->cwnd -= chk->book_size;
655 chk->rec.data.chunk_was_revoked = 0;
657 net->marked_retrans++;
658 stcb->asoc.marked_retrans++;
659 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
660 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO,
661 chk->whoTo->flight_size,
663 (uint32_t)(uintptr_t)chk->whoTo,
666 sctp_flight_size_decrease(chk);
667 sctp_total_flight_decrease(stcb, chk);
668 stcb->asoc.peers_rwnd += chk->send_size;
669 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
671 chk->sent = SCTP_DATAGRAM_RESEND;
672 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
673 SCTP_STAT_INCR(sctps_markedretrans);
675 /* reset the TSN for striking and other FR stuff */
676 chk->rec.data.doing_fast_retransmit = 0;
677 /* Clear any time so NO RTT is being done */
680 if (chk->whoTo->rto_needed == 0) {
681 chk->whoTo->rto_needed = 1;
686 sctp_free_remote_addr(chk->whoTo);
687 chk->no_fr_allowed = 1;
689 atomic_add_int(&alt->ref_count, 1);
691 chk->no_fr_allowed = 0;
692 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
693 chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
695 chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
699 * CMT: Do not allow FRs on retransmitted TSNs.
701 if (stcb->asoc.sctp_cmt_on_off > 0) {
702 chk->no_fr_allowed = 1;
704 #ifdef THIS_SHOULD_NOT_BE_DONE
705 } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
706 /* remember highest acked one */
710 if (chk->sent == SCTP_DATAGRAM_RESEND) {
714 if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
715 /* we did not subtract the same things? */
719 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
720 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
724 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
726 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%u\n",
728 stcb->asoc.peers_rwnd);
731 *num_marked = num_mk;
732 *num_abandoned = cnt_abandoned;
734 * Now check for a ECN Echo that may be stranded And include the
735 * cnt_mk'd to have all resends in the control queue.
737 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
738 if (chk->sent == SCTP_DATAGRAM_RESEND) {
741 if ((chk->whoTo == net) &&
742 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
743 sctp_free_remote_addr(chk->whoTo);
745 if (chk->sent != SCTP_DATAGRAM_RESEND) {
746 chk->sent = SCTP_DATAGRAM_RESEND;
747 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
748 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
751 atomic_add_int(&alt->ref_count, 1);
754 #ifdef THIS_SHOULD_NOT_BE_DONE
755 if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) {
756 /* fix it so we retransmit the highest acked anyway */
757 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
759 could_be_sent->sent = SCTP_DATAGRAM_RESEND;
762 if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
764 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n",
765 cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk);
767 #ifndef SCTP_AUDITING_ENABLED
768 stcb->asoc.sent_queue_retran_cnt = cnt_mk;
772 SCTPDBG(SCTP_DEBUG_TIMER4,
773 "Audit total flight due to negative value net:%p\n",
775 stcb->asoc.total_flight = 0;
776 stcb->asoc.total_flight_count = 0;
777 /* Clear all networks flight size */
778 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) {
779 lnets->flight_size = 0;
780 SCTPDBG(SCTP_DEBUG_TIMER4,
781 "Net:%p c-f cwnd:%d ssthresh:%d\n",
782 (void *)lnets, lnets->cwnd, lnets->ssthresh);
784 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
785 if (chk->sent < SCTP_DATAGRAM_RESEND) {
786 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
787 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
788 chk->whoTo->flight_size,
790 (uint32_t)(uintptr_t)chk->whoTo,
794 sctp_flight_size_increase(chk);
795 sctp_total_flight_increase(stcb, chk);
799 /* We return 1 if we only have a window probe outstanding */
805 sctp_t3rxt_timer(struct sctp_inpcb *inp,
806 struct sctp_tcb *stcb,
807 struct sctp_nets *net)
809 struct sctp_nets *alt;
810 int win_probe, num_mk, num_abandoned;
812 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
813 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
815 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
816 struct sctp_nets *lnet;
818 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
820 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
822 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
826 /* Find an alternate and mark those for retransmission */
827 if ((stcb->asoc.peers_rwnd == 0) &&
828 (stcb->asoc.total_flight < net->mtu)) {
829 SCTP_STAT_INCR(sctps_timowindowprobe);
835 if (win_probe == 0) {
836 /* We don't do normal threshold management on window probes */
837 if (sctp_threshold_management(inp, stcb, net,
838 stcb->asoc.max_send_times)) {
839 /* Association was destroyed */
842 if (net != stcb->asoc.primary_destination) {
843 /* send a immediate HB if our RTO is stale */
845 unsigned int ms_goneby;
847 (void)SCTP_GETTIME_TIMEVAL(&now);
848 if (net->last_sent_time.tv_sec) {
849 ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000;
853 if ((net->dest_state & SCTP_ADDR_PF) == 0) {
854 if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
856 * no recent feed back in an
857 * RTO or more, request a
860 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
867 * For a window probe we don't penalize the net's but only
868 * the association. This may fail it if SACKs are not coming
869 * back. If sack's are coming with rwnd locked at 0, we will
870 * continue to hold things waiting for rwnd to raise
872 if (sctp_threshold_management(inp, stcb, NULL,
873 stcb->asoc.max_send_times)) {
874 /* Association was destroyed */
878 if (stcb->asoc.sctp_cmt_on_off > 0) {
879 if (net->pf_threshold < net->failure_threshold) {
880 alt = sctp_find_alternate_net(stcb, net, 2);
883 * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is
884 * being used, then pick dest with largest ssthresh
885 * for any retransmission.
887 alt = sctp_find_alternate_net(stcb, net, 1);
889 * CUCv2: If a different dest is picked for the
890 * retransmission, then new (rtx-)pseudo_cumack
891 * needs to be tracked for orig dest. Let CUCv2
892 * track new (rtx-) pseudo-cumack always.
894 net->find_pseudo_cumack = 1;
895 net->find_rtx_pseudo_cumack = 1;
898 alt = sctp_find_alternate_net(stcb, net, 0);
903 (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe,
904 &num_mk, &num_abandoned);
905 /* FR Loss recovery just ended with the T3. */
906 stcb->asoc.fast_retran_loss_recovery = 0;
908 /* CMT FR loss recovery ended with the T3 */
909 net->fast_retran_loss_recovery = 0;
910 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
911 (net->flight_size == 0)) {
912 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
916 * setup the sat loss recovery that prevents satellite cwnd advance.
918 stcb->asoc.sat_t3_loss_recovery = 1;
919 stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
921 /* Backoff the timer and cwnd */
922 sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned);
923 if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
924 (net->dest_state & SCTP_ADDR_PF)) {
925 /* Move all pending over too */
926 sctp_move_chunks_from_net(stcb, net);
929 * Get the address that failed, to force a new src address
930 * selecton and a route allocation.
932 if (net->ro._s_addr) {
933 sctp_free_ifa(net->ro._s_addr);
934 net->ro._s_addr = NULL;
936 net->src_addr_selected = 0;
938 /* Force a route allocation too */
941 /* Was it our primary? */
942 if ((stcb->asoc.primary_destination == net) && (alt != net)) {
944 * Yes, note it as such and find an alternate note:
945 * this means HB code must use this to resent the
946 * primary if it goes active AND if someone does a
947 * change-primary then this flag must be cleared
948 * from any net structures.
950 if (stcb->asoc.alternate) {
951 sctp_free_remote_addr(stcb->asoc.alternate);
953 stcb->asoc.alternate = alt;
954 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
958 * Special case for cookie-echo'ed case, we don't do output but must
959 * await the COOKIE-ACK before retransmission
961 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
963 * Here we just reset the timer and start again since we
964 * have not established the asoc
966 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
969 if (stcb->asoc.prsctp_supported) {
970 struct sctp_tmit_chunk *lchk;
972 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc);
973 /* C3. See if we need to send a Fwd-TSN */
974 if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) {
975 send_forward_tsn(stcb, &stcb->asoc);
976 for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) {
977 if (lchk->whoTo != NULL) {
982 /* Assure a timer is up */
983 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
987 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) {
988 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
994 sctp_t1init_timer(struct sctp_inpcb *inp,
995 struct sctp_tcb *stcb,
996 struct sctp_nets *net)
998 /* bump the thresholds */
999 if (stcb->asoc.delayed_connection) {
1001 * special hook for delayed connection. The library did NOT
1002 * complete the rest of its sends.
1004 stcb->asoc.delayed_connection = 0;
1005 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1008 if (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) {
1011 if (sctp_threshold_management(inp, stcb, net,
1012 stcb->asoc.max_init_times)) {
1013 /* Association was destroyed */
1016 stcb->asoc.dropped_special_cnt = 0;
1017 sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0);
1018 if (stcb->asoc.initial_init_rto_max < net->RTO) {
1019 net->RTO = stcb->asoc.initial_init_rto_max;
1021 if (stcb->asoc.numnets > 1) {
1022 /* If we have more than one addr use it */
1023 struct sctp_nets *alt;
1025 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0);
1026 if (alt != stcb->asoc.primary_destination) {
1027 sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination);
1028 stcb->asoc.primary_destination = alt;
1031 /* Send out a new init */
1032 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1037 * For cookie and asconf we actually need to find and mark for resend, then
1038 * increment the resend counter (after all the threshold management stuff of
1042 sctp_cookie_timer(struct sctp_inpcb *inp,
1043 struct sctp_tcb *stcb,
1044 struct sctp_nets *net SCTP_UNUSED)
1046 struct sctp_nets *alt;
1047 struct sctp_tmit_chunk *cookie;
1049 /* first before all else we must find the cookie */
1050 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) {
1051 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
1055 if (cookie == NULL) {
1056 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
1058 struct mbuf *op_err;
1060 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1061 "Cookie timer expired, but no cookie");
1062 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3;
1063 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
1066 panic("Cookie timer expires in wrong state?");
1068 SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(stcb));
1074 /* Ok we found the cookie, threshold management next */
1075 if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1076 stcb->asoc.max_init_times)) {
1081 * Cleared threshold management, now lets backoff the address and
1082 * select an alternate
1084 stcb->asoc.dropped_special_cnt = 0;
1085 sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0);
1086 alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0);
1087 if (alt != cookie->whoTo) {
1088 sctp_free_remote_addr(cookie->whoTo);
1089 cookie->whoTo = alt;
1090 atomic_add_int(&alt->ref_count, 1);
1092 /* Now mark the retran info */
1093 if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1094 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1096 cookie->sent = SCTP_DATAGRAM_RESEND;
1097 cookie->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1099 * Now call the output routine to kick out the cookie again, Note we
1100 * don't mark any chunks for retran so that FR will need to kick in
1101 * to move these (or a send timer).
1107 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1109 struct sctp_nets *alt, *net;
1110 struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1112 if (stcb->asoc.stream_reset_outstanding == 0) {
1115 /* find the existing STRRESET, we use the seq number we sent out on */
1116 (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
1117 if (strrst == NULL) {
1120 net = strrst->whoTo;
1121 /* do threshold management */
1122 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1127 * Cleared threshold management, now lets backoff the address and
1128 * select an alternate
1130 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1131 alt = sctp_find_alternate_net(stcb, net, 0);
1132 strrst->whoTo = alt;
1133 atomic_add_int(&alt->ref_count, 1);
1135 /* See if a ECN Echo is also stranded */
1136 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1137 if ((chk->whoTo == net) &&
1138 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1139 sctp_free_remote_addr(chk->whoTo);
1140 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1141 chk->sent = SCTP_DATAGRAM_RESEND;
1142 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1143 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1146 atomic_add_int(&alt->ref_count, 1);
1149 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1151 * If the address went un-reachable, we need to move to
1152 * alternates for ALL chk's in queue
1154 sctp_move_chunks_from_net(stcb, net);
1156 sctp_free_remote_addr(net);
1158 /* mark the retran info */
1159 if (strrst->sent != SCTP_DATAGRAM_RESEND)
1160 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1161 strrst->sent = SCTP_DATAGRAM_RESEND;
1162 strrst->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1164 /* restart the timer */
1165 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, alt);
1170 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1171 struct sctp_nets *net)
1173 struct sctp_nets *alt;
1174 struct sctp_tmit_chunk *asconf, *chk;
1176 /* is this a first send, or a retransmission? */
1177 if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) {
1178 /* compose a new ASCONF chunk and send it */
1179 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1182 * Retransmission of the existing ASCONF is needed
1185 /* find the existing ASCONF */
1186 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1187 if (asconf == NULL) {
1190 net = asconf->whoTo;
1191 /* do threshold management */
1192 if (sctp_threshold_management(inp, stcb, net,
1193 stcb->asoc.max_send_times)) {
1197 if (asconf->snd_count > stcb->asoc.max_send_times) {
1199 * Something is rotten: our peer is not responding
1200 * to ASCONFs but apparently is to other chunks.
1201 * i.e. it is not properly handling the chunk type
1202 * upper bits. Mark this peer as ASCONF incapable
1205 SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1206 sctp_asconf_cleanup(stcb);
1210 * cleared threshold management, so now backoff the net and
1211 * select an alternate
1213 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1214 alt = sctp_find_alternate_net(stcb, net, 0);
1215 if (asconf->whoTo != alt) {
1216 asconf->whoTo = alt;
1217 atomic_add_int(&alt->ref_count, 1);
1220 /* See if an ECN Echo is also stranded */
1221 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1222 if ((chk->whoTo == net) &&
1223 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1224 sctp_free_remote_addr(chk->whoTo);
1226 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1227 chk->sent = SCTP_DATAGRAM_RESEND;
1228 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1229 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1231 atomic_add_int(&alt->ref_count, 1);
1234 TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1235 if (chk->whoTo != alt) {
1236 sctp_free_remote_addr(chk->whoTo);
1238 atomic_add_int(&alt->ref_count, 1);
1240 if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT)
1241 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1242 chk->sent = SCTP_DATAGRAM_RESEND;
1243 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1245 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1247 * If the address went un-reachable, we need to move
1248 * to the alternate for ALL chunks in queue
1250 sctp_move_chunks_from_net(stcb, net);
1252 sctp_free_remote_addr(net);
1254 /* mark the retran info */
1255 if (asconf->sent != SCTP_DATAGRAM_RESEND)
1256 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1257 asconf->sent = SCTP_DATAGRAM_RESEND;
1258 asconf->flags |= CHUNK_FLAGS_FRAGMENT_OK;
1260 /* send another ASCONF if any and we can do */
1261 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1266 /* Mobility adaptation */
1268 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1270 if (stcb->asoc.deleted_primary == NULL) {
1271 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n");
1272 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1275 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary ");
1276 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1277 sctp_free_remote_addr(stcb->asoc.deleted_primary);
1278 stcb->asoc.deleted_primary = NULL;
1279 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1284 * For the shutdown and shutdown-ack, we do not keep one around on the
1285 * control queue. This means we must generate a new one and call the general
1286 * chunk output routine, AFTER having done threshold management.
1287 * It is assumed that net is non-NULL.
1290 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1291 struct sctp_nets *net)
1293 struct sctp_nets *alt;
1295 /* first threshold management */
1296 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1300 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1301 /* second select an alternative */
1302 alt = sctp_find_alternate_net(stcb, net, 0);
1304 /* third generate a shutdown into the queue for out net */
1305 sctp_send_shutdown(stcb, alt);
1307 /* fourth restart timer */
1308 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1313 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1314 struct sctp_nets *net)
1316 struct sctp_nets *alt;
1318 /* first threshold management */
1319 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1323 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1324 /* second select an alternative */
1325 alt = sctp_find_alternate_net(stcb, net, 0);
1327 /* third generate a shutdown into the queue for out net */
1328 sctp_send_shutdown_ack(stcb, alt);
1330 /* fourth restart timer */
1331 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1336 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp,
1337 struct sctp_tcb *stcb)
1339 struct sctp_stream_queue_pending *sp;
1340 unsigned int i, chks_in_queue = 0;
1341 int being_filled = 0;
1344 * This function is ONLY called when the send/sent queues are empty.
1346 if ((stcb == NULL) || (inp == NULL))
1349 if (stcb->asoc.sent_queue_retran_cnt) {
1350 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n",
1351 stcb->asoc.sent_queue_retran_cnt);
1352 stcb->asoc.sent_queue_retran_cnt = 0;
1354 if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1355 /* No stream scheduler information, initialize scheduler */
1356 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0);
1357 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1358 /* yep, we lost a stream or two */
1359 SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n");
1361 /* no streams lost */
1362 stcb->asoc.total_output_queue_size = 0;
1365 /* Check to see if some data queued, if so report it */
1366 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1367 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
1368 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
1369 if (sp->msg_is_complete)
1375 if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
1376 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n",
1377 stcb->asoc.stream_queue_cnt, chks_in_queue);
1379 if (chks_in_queue) {
1380 /* call the output queue function */
1381 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1382 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1383 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1385 * Probably should go in and make it go back through
1386 * and add fragments allowed
1388 if (being_filled == 0) {
1389 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1394 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n",
1395 (u_long)stcb->asoc.total_output_queue_size);
1396 stcb->asoc.total_output_queue_size = 0;
1401 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1402 struct sctp_nets *net)
1406 if (net->dest_state & SCTP_ADDR_PF) {
1411 if (net->hb_responded == 0) {
1412 if (net->ro._s_addr) {
1414 * Invalidate the src address if we did not get a
1415 * response last time.
1417 sctp_free_ifa(net->ro._s_addr);
1418 net->ro._s_addr = NULL;
1419 net->src_addr_selected = 0;
1421 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1422 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1427 /* Zero PBA, if it needs it */
1428 if (net->partial_bytes_acked) {
1429 net->partial_bytes_acked = 0;
1431 if ((stcb->asoc.total_output_queue_size > 0) &&
1432 (TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1433 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1434 sctp_audit_stream_queues_for_size(inp, stcb);
1436 if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1437 !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1439 * when move to PF during threshold mangement, a HB has been
1440 * queued in that routine
1442 uint32_t ms_gone_by;
1444 if ((net->last_sent_time.tv_sec > 0) ||
1445 (net->last_sent_time.tv_usec > 0)) {
1446 struct timeval diff;
1448 SCTP_GETTIME_TIMEVAL(&diff);
1449 timevalsub(&diff, &net->last_sent_time);
1450 ms_gone_by = (uint32_t)(diff.tv_sec * 1000) +
1451 (uint32_t)(diff.tv_usec / 1000);
1453 ms_gone_by = 0xffffffff;
1455 if ((ms_gone_by >= net->heart_beat_delay) ||
1456 (net->dest_state & SCTP_ADDR_PF)) {
1457 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1464 sctp_pathmtu_timer(struct sctp_inpcb *inp,
1465 struct sctp_tcb *stcb,
1466 struct sctp_nets *net)
1468 uint32_t next_mtu, mtu;
1470 next_mtu = sctp_get_next_mtu(net->mtu);
1472 if ((next_mtu > net->mtu) && (net->port == 0)) {
1473 if ((net->src_addr_selected == 0) ||
1474 (net->ro._s_addr == NULL) ||
1475 (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1476 if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1477 sctp_free_ifa(net->ro._s_addr);
1478 net->ro._s_addr = NULL;
1479 net->src_addr_selected = 0;
1480 } else if (net->ro._s_addr == NULL) {
1481 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1482 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1483 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1485 /* KAME hack: embed scopeid */
1486 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1490 net->ro._s_addr = sctp_source_address_selection(inp,
1492 (sctp_route_t *)&net->ro,
1493 net, 0, stcb->asoc.vrf_id);
1494 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1495 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1496 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1498 (void)sa6_recoverscope(sin6);
1502 if (net->ro._s_addr)
1503 net->src_addr_selected = 1;
1505 if (net->ro._s_addr) {
1506 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_nh);
1507 #if defined(INET) || defined(INET6)
1509 mtu -= sizeof(struct udphdr);
1512 if (mtu > next_mtu) {
1513 net->mtu = next_mtu;
1519 /* restart the timer */
1520 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1524 sctp_autoclose_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1526 struct timeval tn, *tim_touse;
1527 struct sctp_association *asoc;
1528 uint32_t ticks_gone_by;
1530 (void)SCTP_GETTIME_TIMEVAL(&tn);
1531 if (stcb->asoc.sctp_autoclose_ticks > 0 &&
1532 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1533 /* Auto close is on */
1535 /* pick the time to use */
1536 if (asoc->time_last_rcvd.tv_sec >
1537 asoc->time_last_sent.tv_sec) {
1538 tim_touse = &asoc->time_last_rcvd;
1540 tim_touse = &asoc->time_last_sent;
1542 /* Now has long enough transpired to autoclose? */
1543 ticks_gone_by = sctp_secs_to_ticks((uint32_t)(tn.tv_sec - tim_touse->tv_sec));
1544 if (ticks_gone_by >= asoc->sctp_autoclose_ticks) {
1546 * autoclose time has hit, call the output routine,
1547 * which should do nothing just to be SURE we don't
1548 * have hanging data. We can then safely check the
1549 * queues and know that we are clear to send
1552 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1554 if (TAILQ_EMPTY(&asoc->send_queue) &&
1555 TAILQ_EMPTY(&asoc->sent_queue)) {
1557 * there is nothing queued to send, so I'm
1560 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1561 /* only send SHUTDOWN 1st time thru */
1562 struct sctp_nets *net;
1564 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
1565 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1566 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1568 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
1569 sctp_stop_timers_for_shutdown(stcb);
1570 if (stcb->asoc.alternate) {
1571 net = stcb->asoc.alternate;
1573 net = stcb->asoc.primary_destination;
1575 sctp_send_shutdown(stcb, net);
1576 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1577 stcb->sctp_ep, stcb, net);
1578 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1579 stcb->sctp_ep, stcb, NULL);
1584 * No auto close at this time, reset t-o to check
1589 /* fool the timer startup to use the time left */
1590 tmp = asoc->sctp_autoclose_ticks;
1591 asoc->sctp_autoclose_ticks -= ticks_gone_by;
1592 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1593 /* restore the real tick value */
1594 asoc->sctp_autoclose_ticks = tmp;