2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
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("$FreeBSD$");
37 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_pcb.h>
41 #include <netinet/sctp_var.h>
42 #include <netinet/sctp_sysctl.h>
43 #include <netinet/sctp_timer.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_header.h>
47 #include <netinet/sctp_indata.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_input.h>
50 #include <netinet/sctp.h>
51 #include <netinet/sctp_uio.h>
52 #if defined(INET) || defined(INET6)
53 #include <netinet/udp.h>
58 sctp_audit_retranmission_queue(struct sctp_association *asoc)
60 struct sctp_tmit_chunk *chk;
62 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n",
63 asoc->sent_queue_retran_cnt,
64 asoc->sent_queue_cnt);
65 asoc->sent_queue_retran_cnt = 0;
66 asoc->sent_queue_cnt = 0;
67 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
68 if (chk->sent == SCTP_DATAGRAM_RESEND) {
69 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
71 asoc->sent_queue_cnt++;
73 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
74 if (chk->sent == SCTP_DATAGRAM_RESEND) {
75 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
78 TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) {
79 if (chk->sent == SCTP_DATAGRAM_RESEND) {
80 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
83 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n",
84 asoc->sent_queue_retran_cnt,
85 asoc->sent_queue_cnt);
89 sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
90 struct sctp_nets *net, uint16_t threshold)
94 SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n",
95 (void *)net, net->error_count,
96 net->failure_threshold);
97 if (net->error_count > net->failure_threshold) {
98 /* We had a threshold failure */
99 if (net->dest_state & SCTP_ADDR_REACHABLE) {
100 net->dest_state &= ~SCTP_ADDR_REACHABLE;
101 net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
102 net->dest_state &= ~SCTP_ADDR_PF;
103 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
105 (void *)net, SCTP_SO_NOT_LOCKED);
107 } else if ((net->pf_threshold < net->failure_threshold) &&
108 (net->error_count > net->pf_threshold)) {
109 if (!(net->dest_state & SCTP_ADDR_PF)) {
110 net->dest_state |= SCTP_ADDR_PF;
111 net->last_active = sctp_get_tick_count();
112 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
113 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT,
115 SCTP_FROM_SCTP_TIMER + SCTP_LOC_1);
116 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net);
124 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) {
125 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
126 sctp_misc_ints(SCTP_THRESHOLD_INCR,
127 stcb->asoc.overall_error_count,
128 (stcb->asoc.overall_error_count + 1),
129 SCTP_FROM_SCTP_TIMER,
132 stcb->asoc.overall_error_count++;
135 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
136 sctp_misc_ints(SCTP_THRESHOLD_INCR,
137 stcb->asoc.overall_error_count,
138 (stcb->asoc.overall_error_count + 1),
139 SCTP_FROM_SCTP_TIMER,
142 stcb->asoc.overall_error_count++;
144 SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n",
145 (void *)&stcb->asoc, stcb->asoc.overall_error_count,
146 (uint32_t) threshold,
147 ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state));
149 * We specifically do not do >= to give the assoc one more change
152 if (stcb->asoc.overall_error_count > threshold) {
153 /* Abort notification sends a ULP notify */
156 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
157 "Association error counter exceeded");
158 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_2;
159 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
166 * sctp_find_alternate_net() returns a non-NULL pointer as long
167 * the argument net is non-NULL.
170 sctp_find_alternate_net(struct sctp_tcb *stcb,
171 struct sctp_nets *net,
174 /* Find and return an alternate network if possible */
175 struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL;
178 /* JRS 5/14/07 - Initialize min_errors to an impossible value. */
180 uint32_t max_cwnd = 0;
182 if (stcb->asoc.numnets == 1) {
183 /* No others but net */
184 return (TAILQ_FIRST(&stcb->asoc.nets));
187 * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate
188 * net algorithm. This algorithm chooses the active destination (not
189 * in PF state) with the largest cwnd value. If all destinations are
190 * in PF state, unreachable, or unconfirmed, choose the desination
191 * that is in PF state with the lowest error count. In case of a
192 * tie, choose the destination that was most recently active.
195 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
197 * JRS 5/14/07 - If the destination is unreachable
198 * or unconfirmed, skip it.
200 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
201 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
205 * JRS 5/14/07 - If the destination is reachable
206 * but in PF state, compare the error count of the
207 * destination to the minimum error count seen thus
208 * far. Store the destination with the lower error
209 * count. If the error counts are equal, store the
210 * destination that was most recently active.
212 if (mnet->dest_state & SCTP_ADDR_PF) {
214 * JRS 5/14/07 - If the destination under
215 * consideration is the current destination,
216 * work as if the error count is one higher.
217 * The actual error count will not be
218 * incremented until later in the t3
222 if (min_errors == -1) {
223 min_errors = mnet->error_count + 1;
224 min_errors_net = mnet;
225 } else if (mnet->error_count + 1 < min_errors) {
226 min_errors = mnet->error_count + 1;
227 min_errors_net = mnet;
228 } else if (mnet->error_count + 1 == min_errors
229 && mnet->last_active > min_errors_net->last_active) {
230 min_errors_net = mnet;
231 min_errors = mnet->error_count + 1;
235 if (min_errors == -1) {
236 min_errors = mnet->error_count;
237 min_errors_net = mnet;
238 } else if (mnet->error_count < min_errors) {
239 min_errors = mnet->error_count;
240 min_errors_net = mnet;
241 } else if (mnet->error_count == min_errors
242 && mnet->last_active > min_errors_net->last_active) {
243 min_errors_net = mnet;
244 min_errors = mnet->error_count;
250 * JRS 5/14/07 - If the destination is reachable and
251 * not in PF state, compare the cwnd of the
252 * destination to the highest cwnd seen thus far.
253 * Store the destination with the higher cwnd value.
254 * If the cwnd values are equal, randomly choose one
255 * of the two destinations.
257 if (max_cwnd < mnet->cwnd) {
259 max_cwnd = mnet->cwnd;
260 } else if (max_cwnd == mnet->cwnd) {
264 if (stcb->asoc.hb_random_idx > 3) {
265 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
266 memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values));
267 this_random = stcb->asoc.hb_random_values[0];
268 stcb->asoc.hb_random_idx++;
269 stcb->asoc.hb_ect_randombit = 0;
271 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
272 stcb->asoc.hb_random_idx++;
273 stcb->asoc.hb_ect_randombit = 0;
275 if (this_random % 2 == 1) {
277 max_cwnd = mnet->cwnd; /* Useless? */
281 if (max_cwnd_net == NULL) {
282 if (min_errors_net == NULL) {
285 return (min_errors_net);
287 return (max_cwnd_net);
291 * JRS 5/14/07 - If mode is set to 1, use the CMT policy for
292 * choosing an alternate net.
294 else if (mode == 1) {
295 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
296 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
297 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
299 * will skip ones that are not-reachable or
304 if (max_cwnd < mnet->cwnd) {
306 max_cwnd = mnet->cwnd;
307 } else if (max_cwnd == mnet->cwnd) {
311 if (stcb->asoc.hb_random_idx > 3) {
312 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
313 memcpy(stcb->asoc.hb_random_values, &rndval,
314 sizeof(stcb->asoc.hb_random_values));
315 this_random = stcb->asoc.hb_random_values[0];
316 stcb->asoc.hb_random_idx = 0;
317 stcb->asoc.hb_ect_randombit = 0;
319 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
320 stcb->asoc.hb_random_idx++;
321 stcb->asoc.hb_ect_randombit = 0;
323 if (this_random % 2) {
325 max_cwnd = mnet->cwnd;
330 return (max_cwnd_net);
337 mnet = TAILQ_FIRST(&stcb->asoc.nets);
343 alt = TAILQ_NEXT(mnet, sctp_next);
349 alt = TAILQ_FIRST(&stcb->asoc.nets);
354 if (alt->ro.ro_rt == NULL) {
355 if (alt->ro._s_addr) {
356 sctp_free_ifa(alt->ro._s_addr);
357 alt->ro._s_addr = NULL;
359 alt->src_addr_selected = 0;
361 if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
362 (alt->ro.ro_rt != NULL) &&
363 (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) {
364 /* Found a reachable address */
371 /* Case where NO insv network exists (dormant state) */
372 /* we rotate destinations */
377 return (TAILQ_FIRST(&stcb->asoc.nets));
379 alt = TAILQ_NEXT(mnet, sctp_next);
385 alt = TAILQ_FIRST(&stcb->asoc.nets);
390 if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
392 /* Found an alternate address */
405 sctp_backoff_on_timeout(struct sctp_tcb *stcb,
406 struct sctp_nets *net,
408 int num_marked, int num_abandoned)
411 if (net->RTO_measured) {
412 net->RTO = stcb->asoc.minrto;
414 net->RTO = stcb->asoc.initial_rto;
418 if (net->RTO > stcb->asoc.maxrto) {
419 net->RTO = stcb->asoc.maxrto;
421 if ((win_probe == 0) && (num_marked || num_abandoned)) {
422 /* We don't apply penalty to window probe scenarios */
423 /* JRS - Use the congestion control given in the CC module */
424 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net);
430 sctp_recover_sent_list(struct sctp_tcb *stcb)
432 struct sctp_tmit_chunk *chk, *nchk;
433 struct sctp_association *asoc;
436 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
437 if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) {
438 SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n",
439 (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq);
440 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
441 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
442 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
445 if ((asoc->strmout[chk->rec.data.stream_number].chunks_on_queues == 0) &&
446 (asoc->strmout[chk->rec.data.stream_number].state == SCTP_STREAM_RESET_PENDING) &&
447 TAILQ_EMPTY(&asoc->strmout[chk->rec.data.stream_number].outqueue)) {
448 asoc->trigger_reset = 1;
450 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
451 if (PR_SCTP_ENABLED(chk->flags)) {
452 if (asoc->pr_sctp_cnt != 0)
456 /* sa_ignore NO_NULL_CHK */
457 sctp_free_bufspace(stcb, asoc, chk, 1);
458 sctp_m_freem(chk->data);
460 if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) {
461 asoc->sent_queue_cnt_removeable--;
464 asoc->sent_queue_cnt--;
465 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
468 SCTP_PRINTF("after recover order is as follows\n");
469 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
470 SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq);
477 sctp_mark_all_for_resend(struct sctp_tcb *stcb,
478 struct sctp_nets *net,
479 struct sctp_nets *alt,
486 * Mark all chunks (well not all) that were sent to *net for
487 * retransmission. Move them to alt for there destination as well...
488 * We only mark chunks that have been outstanding long enough to
489 * have received feed-back.
491 struct sctp_tmit_chunk *chk, *nchk;
492 struct sctp_nets *lnets;
493 struct timeval now, min_wait, tv;
496 int audit_tf, num_mk, fir;
498 uint32_t orig_flight, orig_tf;
499 uint32_t tsnlast, tsnfirst;
500 int recovery_cnt = 0;
503 /* none in flight now */
507 * figure out how long a data chunk must be pending before we can
510 (void)SCTP_GETTIME_TIMEVAL(&now);
511 /* get cur rto in micro-seconds */
512 cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
514 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
516 stcb->asoc.peers_rwnd,
518 SCTP_FR_T3_MARK_TIME);
519 sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT);
520 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
522 tv.tv_sec = cur_rto / 1000000;
523 tv.tv_usec = cur_rto % 1000000;
525 timevalsub(&min_wait, &tv);
526 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
528 * if we hit here, we don't have enough seconds on the clock
529 * to account for the RTO. We just let the lower seconds be
530 * the bounds and don't worry about it. This may mean we
531 * will mark a lot more than we should.
533 min_wait.tv_sec = min_wait.tv_usec = 0;
535 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
536 sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
537 sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
540 * Our rwnd will be incorrect here since we are not adding back the
541 * cnt * mbuf but we will fix that down below.
543 orig_flight = net->flight_size;
544 orig_tf = stcb->asoc.total_flight;
546 net->fast_retran_ip = 0;
547 /* Now on to each chunk */
550 tsnfirst = tsnlast = 0;
554 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) {
555 if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) {
556 /* Strange case our list got out of order? */
557 SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n",
558 (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq);
561 panic("last acked >= chk on sent-Q");
563 SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
564 sctp_recover_sent_list(stcb);
565 if (recovery_cnt < 10) {
568 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
572 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
574 * found one to mark: If it is less than
575 * DATAGRAM_ACKED it MUST not be a skipped or marked
576 * TSN but instead one that is either already set
577 * for retransmission OR one that needs
581 /* validate its been outstanding long enough */
582 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
583 sctp_log_fr(chk->rec.data.TSN_seq,
584 chk->sent_rcv_time.tv_sec,
585 chk->sent_rcv_time.tv_usec,
586 SCTP_FR_T3_MARK_TIME);
588 if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
590 * we have reached a chunk that was sent
591 * some seconds past our min.. forget it we
592 * will find no more to send.
594 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
596 chk->sent_rcv_time.tv_sec,
597 chk->sent_rcv_time.tv_usec,
601 } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
602 (window_probe == 0)) {
604 * we must look at the micro seconds to
607 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
609 * ok it was sent after our boundary
615 if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) {
617 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
620 (void)sctp_release_pr_sctp_chunk(stcb,
629 if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) {
630 /* Has it been retransmitted tv_sec times? */
631 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) {
633 (void)sctp_release_pr_sctp_chunk(stcb,
642 if (chk->sent < SCTP_DATAGRAM_RESEND) {
643 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
647 tsnfirst = chk->rec.data.TSN_seq;
649 tsnlast = chk->rec.data.TSN_seq;
650 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
651 sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count,
652 0, SCTP_FR_T3_MARKED);
654 if (chk->rec.data.chunk_was_revoked) {
655 /* deflate the cwnd */
656 chk->whoTo->cwnd -= chk->book_size;
657 chk->rec.data.chunk_was_revoked = 0;
659 net->marked_retrans++;
660 stcb->asoc.marked_retrans++;
661 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
662 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO,
663 chk->whoTo->flight_size,
665 (uintptr_t) chk->whoTo,
666 chk->rec.data.TSN_seq);
668 sctp_flight_size_decrease(chk);
669 sctp_total_flight_decrease(stcb, chk);
670 stcb->asoc.peers_rwnd += chk->send_size;
671 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
673 chk->sent = SCTP_DATAGRAM_RESEND;
674 SCTP_STAT_INCR(sctps_markedretrans);
676 /* reset the TSN for striking and other FR stuff */
677 chk->rec.data.doing_fast_retransmit = 0;
678 /* Clear any time so NO RTT is being done */
681 if (chk->whoTo->rto_needed == 0) {
682 chk->whoTo->rto_needed = 1;
687 sctp_free_remote_addr(chk->whoTo);
688 chk->no_fr_allowed = 1;
690 atomic_add_int(&alt->ref_count, 1);
692 chk->no_fr_allowed = 0;
693 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
694 chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
696 chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
700 * CMT: Do not allow FRs on retransmitted TSNs.
702 if (stcb->asoc.sctp_cmt_on_off > 0) {
703 chk->no_fr_allowed = 1;
705 #ifdef THIS_SHOULD_NOT_BE_DONE
706 } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
707 /* remember highest acked one */
711 if (chk->sent == SCTP_DATAGRAM_RESEND) {
715 if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
716 /* 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:%ld\n",
727 num_mk, (u_long)stcb->asoc.peers_rwnd);
728 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
730 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n",
732 (int)stcb->asoc.peers_rwnd);
735 *num_marked = num_mk;
736 *num_abandoned = cnt_abandoned;
738 * Now check for a ECN Echo that may be stranded And include the
739 * cnt_mk'd to have all resends in the control queue.
741 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
742 if (chk->sent == SCTP_DATAGRAM_RESEND) {
745 if ((chk->whoTo == net) &&
746 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
747 sctp_free_remote_addr(chk->whoTo);
749 if (chk->sent != SCTP_DATAGRAM_RESEND) {
750 chk->sent = SCTP_DATAGRAM_RESEND;
751 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
754 atomic_add_int(&alt->ref_count, 1);
757 #ifdef THIS_SHOULD_NOT_BE_DONE
758 if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) {
759 /* fix it so we retransmit the highest acked anyway */
760 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
762 could_be_sent->sent = SCTP_DATAGRAM_RESEND;
765 if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
767 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n",
768 cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk);
770 #ifndef SCTP_AUDITING_ENABLED
771 stcb->asoc.sent_queue_retran_cnt = cnt_mk;
775 SCTPDBG(SCTP_DEBUG_TIMER4,
776 "Audit total flight due to negative value net:%p\n",
778 stcb->asoc.total_flight = 0;
779 stcb->asoc.total_flight_count = 0;
780 /* Clear all networks flight size */
781 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) {
782 lnets->flight_size = 0;
783 SCTPDBG(SCTP_DEBUG_TIMER4,
784 "Net:%p c-f cwnd:%d ssthresh:%d\n",
785 (void *)lnets, lnets->cwnd, lnets->ssthresh);
787 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
788 if (chk->sent < SCTP_DATAGRAM_RESEND) {
789 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
790 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
791 chk->whoTo->flight_size,
793 (uintptr_t) chk->whoTo,
794 chk->rec.data.TSN_seq);
796 sctp_flight_size_increase(chk);
797 sctp_total_flight_increase(stcb, chk);
801 /* We return 1 if we only have a window probe outstanding */
807 sctp_t3rxt_timer(struct sctp_inpcb *inp,
808 struct sctp_tcb *stcb,
809 struct sctp_nets *net)
811 struct sctp_nets *alt;
812 int win_probe, num_mk, num_abandoned;
814 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
815 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
817 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
818 struct sctp_nets *lnet;
820 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
822 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
824 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
828 /* Find an alternate and mark those for retransmission */
829 if ((stcb->asoc.peers_rwnd == 0) &&
830 (stcb->asoc.total_flight < net->mtu)) {
831 SCTP_STAT_INCR(sctps_timowindowprobe);
837 if (win_probe == 0) {
838 /* We don't do normal threshold management on window probes */
839 if (sctp_threshold_management(inp, stcb, net,
840 stcb->asoc.max_send_times)) {
841 /* Association was destroyed */
844 if (net != stcb->asoc.primary_destination) {
845 /* send a immediate HB if our RTO is stale */
847 unsigned int ms_goneby;
849 (void)SCTP_GETTIME_TIMEVAL(&now);
850 if (net->last_sent_time.tv_sec) {
851 ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000;
855 if ((net->dest_state & SCTP_ADDR_PF) == 0) {
856 if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
858 * no recent feed back in an
859 * RTO or more, request a
862 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
869 * For a window probe we don't penalize the net's but only
870 * the association. This may fail it if SACKs are not coming
871 * back. If sack's are coming with rwnd locked at 0, we will
872 * continue to hold things waiting for rwnd to raise
874 if (sctp_threshold_management(inp, stcb, NULL,
875 stcb->asoc.max_send_times)) {
876 /* Association was destroyed */
880 if (stcb->asoc.sctp_cmt_on_off > 0) {
881 if (net->pf_threshold < net->failure_threshold) {
882 alt = sctp_find_alternate_net(stcb, net, 2);
885 * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is
886 * being used, then pick dest with largest ssthresh
887 * for any retransmission.
889 alt = sctp_find_alternate_net(stcb, net, 1);
891 * CUCv2: If a different dest is picked for the
892 * retransmission, then new (rtx-)pseudo_cumack
893 * needs to be tracked for orig dest. Let CUCv2
894 * track new (rtx-) pseudo-cumack always.
896 net->find_pseudo_cumack = 1;
897 net->find_rtx_pseudo_cumack = 1;
900 alt = sctp_find_alternate_net(stcb, net, 0);
905 (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe,
906 &num_mk, &num_abandoned);
907 /* FR Loss recovery just ended with the T3. */
908 stcb->asoc.fast_retran_loss_recovery = 0;
910 /* CMT FR loss recovery ended with the T3 */
911 net->fast_retran_loss_recovery = 0;
912 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
913 (net->flight_size == 0)) {
914 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
917 * setup the sat loss recovery that prevents satellite cwnd advance.
919 stcb->asoc.sat_t3_loss_recovery = 1;
920 stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
922 /* Backoff the timer and cwnd */
923 sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned);
924 if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
925 (net->dest_state & SCTP_ADDR_PF)) {
926 /* Move all pending over too */
927 sctp_move_chunks_from_net(stcb, net);
930 * Get the address that failed, to force a new src address
931 * selecton and a route allocation.
933 if (net->ro._s_addr) {
934 sctp_free_ifa(net->ro._s_addr);
935 net->ro._s_addr = NULL;
937 net->src_addr_selected = 0;
939 /* Force a route allocation too */
941 RTFREE(net->ro.ro_rt);
942 net->ro.ro_rt = NULL;
944 /* Was it our primary? */
945 if ((stcb->asoc.primary_destination == net) && (alt != net)) {
947 * Yes, note it as such and find an alternate note:
948 * this means HB code must use this to resent the
949 * primary if it goes active AND if someone does a
950 * change-primary then this flag must be cleared
951 * from any net structures.
953 if (stcb->asoc.alternate) {
954 sctp_free_remote_addr(stcb->asoc.alternate);
956 stcb->asoc.alternate = alt;
957 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
961 * Special case for cookie-echo'ed case, we don't do output but must
962 * await the COOKIE-ACK before retransmission
964 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
966 * Here we just reset the timer and start again since we
967 * have not established the asoc
969 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
972 if (stcb->asoc.prsctp_supported) {
973 struct sctp_tmit_chunk *lchk;
975 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc);
976 /* C3. See if we need to send a Fwd-TSN */
977 if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) {
978 send_forward_tsn(stcb, &stcb->asoc);
980 /* Assure a timer is up */
981 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
985 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) {
986 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
992 sctp_t1init_timer(struct sctp_inpcb *inp,
993 struct sctp_tcb *stcb,
994 struct sctp_nets *net)
996 /* bump the thresholds */
997 if (stcb->asoc.delayed_connection) {
999 * special hook for delayed connection. The library did NOT
1000 * complete the rest of its sends.
1002 stcb->asoc.delayed_connection = 0;
1003 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1006 if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) {
1009 if (sctp_threshold_management(inp, stcb, net,
1010 stcb->asoc.max_init_times)) {
1011 /* Association was destroyed */
1014 stcb->asoc.dropped_special_cnt = 0;
1015 sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0);
1016 if (stcb->asoc.initial_init_rto_max < net->RTO) {
1017 net->RTO = stcb->asoc.initial_init_rto_max;
1019 if (stcb->asoc.numnets > 1) {
1020 /* If we have more than one addr use it */
1021 struct sctp_nets *alt;
1023 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0);
1024 if (alt != stcb->asoc.primary_destination) {
1025 sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination);
1026 stcb->asoc.primary_destination = alt;
1029 /* Send out a new init */
1030 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1035 * For cookie and asconf we actually need to find and mark for resend, then
1036 * increment the resend counter (after all the threshold management stuff of
1040 sctp_cookie_timer(struct sctp_inpcb *inp,
1041 struct sctp_tcb *stcb,
1042 struct sctp_nets *net SCTP_UNUSED)
1044 struct sctp_nets *alt;
1045 struct sctp_tmit_chunk *cookie;
1047 /* first before all else we must find the cookie */
1048 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) {
1049 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
1053 if (cookie == NULL) {
1054 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
1056 struct mbuf *op_err;
1058 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1059 "Cookie timer expired, but no cookie");
1060 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3;
1061 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
1064 panic("Cookie timer expires in wrong state?");
1066 SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc));
1072 /* Ok we found the cookie, threshold management next */
1073 if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1074 stcb->asoc.max_init_times)) {
1079 * cleared theshold management now lets backoff the address & select
1082 stcb->asoc.dropped_special_cnt = 0;
1083 sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0);
1084 alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0);
1085 if (alt != cookie->whoTo) {
1086 sctp_free_remote_addr(cookie->whoTo);
1087 cookie->whoTo = alt;
1088 atomic_add_int(&alt->ref_count, 1);
1090 /* Now mark the retran info */
1091 if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1092 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1094 cookie->sent = SCTP_DATAGRAM_RESEND;
1096 * Now call the output routine to kick out the cookie again, Note we
1097 * don't mark any chunks for retran so that FR will need to kick in
1098 * to move these (or a send timer).
1104 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1105 struct sctp_nets *net)
1107 struct sctp_nets *alt;
1108 struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1110 if (stcb->asoc.stream_reset_outstanding == 0) {
1113 /* find the existing STRRESET, we use the seq number we sent out on */
1114 (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
1115 if (strrst == NULL) {
1118 /* do threshold management */
1119 if (sctp_threshold_management(inp, stcb, strrst->whoTo,
1120 stcb->asoc.max_send_times)) {
1125 * cleared theshold management now lets backoff the address & select
1128 sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0);
1129 alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0);
1130 sctp_free_remote_addr(strrst->whoTo);
1131 strrst->whoTo = alt;
1132 atomic_add_int(&alt->ref_count, 1);
1134 /* See if a ECN Echo is also stranded */
1135 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1136 if ((chk->whoTo == net) &&
1137 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1138 sctp_free_remote_addr(chk->whoTo);
1139 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1140 chk->sent = SCTP_DATAGRAM_RESEND;
1141 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1144 atomic_add_int(&alt->ref_count, 1);
1147 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1149 * If the address went un-reachable, we need to move to
1150 * alternates for ALL chk's in queue
1152 sctp_move_chunks_from_net(stcb, net);
1154 /* mark the retran info */
1155 if (strrst->sent != SCTP_DATAGRAM_RESEND)
1156 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1157 strrst->sent = SCTP_DATAGRAM_RESEND;
1159 /* restart the timer */
1160 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo);
1165 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1166 struct sctp_nets *net)
1168 struct sctp_nets *alt;
1169 struct sctp_tmit_chunk *asconf, *chk;
1171 /* is this a first send, or a retransmission? */
1172 if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) {
1173 /* compose a new ASCONF chunk and send it */
1174 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1177 * Retransmission of the existing ASCONF is needed
1180 /* find the existing ASCONF */
1181 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1182 if (asconf == NULL) {
1185 /* do threshold management */
1186 if (sctp_threshold_management(inp, stcb, asconf->whoTo,
1187 stcb->asoc.max_send_times)) {
1191 if (asconf->snd_count > stcb->asoc.max_send_times) {
1193 * Something is rotten: our peer is not responding
1194 * to ASCONFs but apparently is to other chunks.
1195 * i.e. it is not properly handling the chunk type
1196 * upper bits. Mark this peer as ASCONF incapable
1199 SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1200 sctp_asconf_cleanup(stcb, net);
1204 * cleared threshold management, so now backoff the net and
1205 * select an alternate
1207 sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0);
1208 alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0);
1209 if (asconf->whoTo != alt) {
1210 sctp_free_remote_addr(asconf->whoTo);
1211 asconf->whoTo = alt;
1212 atomic_add_int(&alt->ref_count, 1);
1214 /* See if an ECN Echo is also stranded */
1215 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1216 if ((chk->whoTo == net) &&
1217 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1218 sctp_free_remote_addr(chk->whoTo);
1220 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1221 chk->sent = SCTP_DATAGRAM_RESEND;
1222 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1224 atomic_add_int(&alt->ref_count, 1);
1227 TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1228 if (chk->whoTo != alt) {
1229 sctp_free_remote_addr(chk->whoTo);
1231 atomic_add_int(&alt->ref_count, 1);
1233 if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT)
1234 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1235 chk->sent = SCTP_DATAGRAM_RESEND;
1237 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1239 * If the address went un-reachable, we need to move
1240 * to the alternate for ALL chunks in queue
1242 sctp_move_chunks_from_net(stcb, net);
1244 /* mark the retran info */
1245 if (asconf->sent != SCTP_DATAGRAM_RESEND)
1246 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1247 asconf->sent = SCTP_DATAGRAM_RESEND;
1249 /* send another ASCONF if any and we can do */
1250 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1255 /* Mobility adaptation */
1257 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1258 struct sctp_nets *net SCTP_UNUSED)
1260 if (stcb->asoc.deleted_primary == NULL) {
1261 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n");
1262 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1265 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary ");
1266 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1267 sctp_free_remote_addr(stcb->asoc.deleted_primary);
1268 stcb->asoc.deleted_primary = NULL;
1269 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1274 * For the shutdown and shutdown-ack, we do not keep one around on the
1275 * control queue. This means we must generate a new one and call the general
1276 * chunk output routine, AFTER having done threshold management.
1277 * It is assumed that net is non-NULL.
1280 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1281 struct sctp_nets *net)
1283 struct sctp_nets *alt;
1285 /* first threshold managment */
1286 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1290 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1291 /* second select an alternative */
1292 alt = sctp_find_alternate_net(stcb, net, 0);
1294 /* third generate a shutdown into the queue for out net */
1295 sctp_send_shutdown(stcb, alt);
1297 /* fourth restart timer */
1298 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1303 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1304 struct sctp_nets *net)
1306 struct sctp_nets *alt;
1308 /* first threshold managment */
1309 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1313 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1314 /* second select an alternative */
1315 alt = sctp_find_alternate_net(stcb, net, 0);
1317 /* third generate a shutdown into the queue for out net */
1318 sctp_send_shutdown_ack(stcb, alt);
1320 /* fourth restart timer */
1321 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1326 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp,
1327 struct sctp_tcb *stcb)
1329 struct sctp_stream_queue_pending *sp;
1330 unsigned int i, chks_in_queue = 0;
1331 int being_filled = 0;
1334 * This function is ONLY called when the send/sent queues are empty.
1336 if ((stcb == NULL) || (inp == NULL))
1339 if (stcb->asoc.sent_queue_retran_cnt) {
1340 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n",
1341 stcb->asoc.sent_queue_retran_cnt);
1342 stcb->asoc.sent_queue_retran_cnt = 0;
1344 if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1345 /* No stream scheduler information, initialize scheduler */
1346 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0);
1347 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1348 /* yep, we lost a stream or two */
1349 SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n");
1351 /* no streams lost */
1352 stcb->asoc.total_output_queue_size = 0;
1355 /* Check to see if some data queued, if so report it */
1356 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1357 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
1358 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
1359 if (sp->msg_is_complete)
1365 if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
1366 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n",
1367 stcb->asoc.stream_queue_cnt, chks_in_queue);
1369 if (chks_in_queue) {
1370 /* call the output queue function */
1371 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1372 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1373 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1375 * Probably should go in and make it go back through
1376 * and add fragments allowed
1378 if (being_filled == 0) {
1379 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1384 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n",
1385 (u_long)stcb->asoc.total_output_queue_size);
1386 stcb->asoc.total_output_queue_size = 0;
1391 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1392 struct sctp_nets *net)
1396 if (net->dest_state & SCTP_ADDR_PF) {
1401 if (net->hb_responded == 0) {
1402 if (net->ro._s_addr) {
1404 * Invalidate the src address if we did not get a
1405 * response last time.
1407 sctp_free_ifa(net->ro._s_addr);
1408 net->ro._s_addr = NULL;
1409 net->src_addr_selected = 0;
1411 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1412 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1417 /* Zero PBA, if it needs it */
1418 if (net->partial_bytes_acked) {
1419 net->partial_bytes_acked = 0;
1421 if ((stcb->asoc.total_output_queue_size > 0) &&
1422 (TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1423 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1424 sctp_audit_stream_queues_for_size(inp, stcb);
1426 if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1427 !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1429 * when move to PF during threshold mangement, a HB has been
1430 * queued in that routine
1432 uint32_t ms_gone_by;
1434 if ((net->last_sent_time.tv_sec > 0) ||
1435 (net->last_sent_time.tv_usec > 0)) {
1436 struct timeval diff;
1438 SCTP_GETTIME_TIMEVAL(&diff);
1439 timevalsub(&diff, &net->last_sent_time);
1440 ms_gone_by = (uint32_t) (diff.tv_sec * 1000) +
1441 (uint32_t) (diff.tv_usec / 1000);
1443 ms_gone_by = 0xffffffff;
1445 if ((ms_gone_by >= net->heart_beat_delay) ||
1446 (net->dest_state & SCTP_ADDR_PF)) {
1447 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1454 sctp_pathmtu_timer(struct sctp_inpcb *inp,
1455 struct sctp_tcb *stcb,
1456 struct sctp_nets *net)
1458 uint32_t next_mtu, mtu;
1460 next_mtu = sctp_get_next_mtu(net->mtu);
1462 if ((next_mtu > net->mtu) && (net->port == 0)) {
1463 if ((net->src_addr_selected == 0) ||
1464 (net->ro._s_addr == NULL) ||
1465 (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1466 if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1467 sctp_free_ifa(net->ro._s_addr);
1468 net->ro._s_addr = NULL;
1469 net->src_addr_selected = 0;
1470 } else if (net->ro._s_addr == NULL) {
1471 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1472 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1473 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1475 /* KAME hack: embed scopeid */
1476 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1480 net->ro._s_addr = sctp_source_address_selection(inp,
1482 (sctp_route_t *) & net->ro,
1483 net, 0, stcb->asoc.vrf_id);
1484 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1485 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1486 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1488 (void)sa6_recoverscope(sin6);
1492 if (net->ro._s_addr)
1493 net->src_addr_selected = 1;
1495 if (net->ro._s_addr) {
1496 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt);
1497 #if defined(INET) || defined(INET6)
1499 mtu -= sizeof(struct udphdr);
1502 if (mtu > next_mtu) {
1503 net->mtu = next_mtu;
1509 /* restart the timer */
1510 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1514 sctp_autoclose_timer(struct sctp_inpcb *inp,
1515 struct sctp_tcb *stcb,
1516 struct sctp_nets *net)
1518 struct timeval tn, *tim_touse;
1519 struct sctp_association *asoc;
1522 (void)SCTP_GETTIME_TIMEVAL(&tn);
1523 if (stcb->asoc.sctp_autoclose_ticks &&
1524 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1525 /* Auto close is on */
1527 /* pick the time to use */
1528 if (asoc->time_last_rcvd.tv_sec >
1529 asoc->time_last_sent.tv_sec) {
1530 tim_touse = &asoc->time_last_rcvd;
1532 tim_touse = &asoc->time_last_sent;
1534 /* Now has long enough transpired to autoclose? */
1535 ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec);
1536 if ((ticks_gone_by > 0) &&
1537 (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) {
1539 * autoclose time has hit, call the output routine,
1540 * which should do nothing just to be SURE we don't
1541 * have hanging data. We can then safely check the
1542 * queues and know that we are clear to send
1545 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1547 if (TAILQ_EMPTY(&asoc->send_queue) &&
1548 TAILQ_EMPTY(&asoc->sent_queue)) {
1550 * there is nothing queued to send, so I'm
1553 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1554 /* only send SHUTDOWN 1st time thru */
1555 struct sctp_nets *netp;
1557 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
1558 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1559 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1561 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
1562 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
1563 sctp_stop_timers_for_shutdown(stcb);
1564 if (stcb->asoc.alternate) {
1565 netp = stcb->asoc.alternate;
1567 netp = stcb->asoc.primary_destination;
1569 sctp_send_shutdown(stcb, netp);
1570 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1571 stcb->sctp_ep, stcb,
1573 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1574 stcb->sctp_ep, stcb,
1580 * No auto close at this time, reset t-o to check
1585 /* fool the timer startup to use the time left */
1586 tmp = asoc->sctp_autoclose_ticks;
1587 asoc->sctp_autoclose_ticks -= ticks_gone_by;
1588 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1590 /* restore the real tick value */
1591 asoc->sctp_autoclose_ticks = tmp;