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 #include <netinet/udp.h>
56 sctp_audit_retranmission_queue(struct sctp_association *asoc)
58 struct sctp_tmit_chunk *chk;
60 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n",
61 asoc->sent_queue_retran_cnt,
62 asoc->sent_queue_cnt);
63 asoc->sent_queue_retran_cnt = 0;
64 asoc->sent_queue_cnt = 0;
65 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
66 if (chk->sent == SCTP_DATAGRAM_RESEND) {
67 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
69 asoc->sent_queue_cnt++;
71 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
72 if (chk->sent == SCTP_DATAGRAM_RESEND) {
73 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
76 TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) {
77 if (chk->sent == SCTP_DATAGRAM_RESEND) {
78 sctp_ucount_incr(asoc->sent_queue_retran_cnt);
81 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n",
82 asoc->sent_queue_retran_cnt,
83 asoc->sent_queue_cnt);
87 sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
88 struct sctp_nets *net, uint16_t threshold)
92 SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n",
93 (void *)net, net->error_count,
94 net->failure_threshold);
95 if (net->error_count > net->failure_threshold) {
96 /* We had a threshold failure */
97 if (net->dest_state & SCTP_ADDR_REACHABLE) {
98 net->dest_state &= ~SCTP_ADDR_REACHABLE;
99 net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
100 net->dest_state &= ~SCTP_ADDR_PF;
101 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
103 (void *)net, SCTP_SO_NOT_LOCKED);
105 } else if ((net->pf_threshold < net->failure_threshold) &&
106 (net->error_count > net->pf_threshold)) {
107 if (!(net->dest_state & SCTP_ADDR_PF)) {
108 net->dest_state |= SCTP_ADDR_PF;
109 net->last_active = sctp_get_tick_count();
110 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
111 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_TIMER + SCTP_LOC_3);
112 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
120 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) {
121 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
122 sctp_misc_ints(SCTP_THRESHOLD_INCR,
123 stcb->asoc.overall_error_count,
124 (stcb->asoc.overall_error_count + 1),
125 SCTP_FROM_SCTP_TIMER,
128 stcb->asoc.overall_error_count++;
131 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
132 sctp_misc_ints(SCTP_THRESHOLD_INCR,
133 stcb->asoc.overall_error_count,
134 (stcb->asoc.overall_error_count + 1),
135 SCTP_FROM_SCTP_TIMER,
138 stcb->asoc.overall_error_count++;
140 SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n",
141 (void *)&stcb->asoc, stcb->asoc.overall_error_count,
142 (uint32_t) threshold,
143 ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state));
145 * We specifically do not do >= to give the assoc one more change
148 if (stcb->asoc.overall_error_count > threshold) {
149 /* Abort notification sends a ULP notify */
152 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION,
153 "Association error couter exceeded");
154 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1;
155 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
162 * sctp_find_alternate_net() returns a non-NULL pointer as long
163 * the argument net is non-NULL.
166 sctp_find_alternate_net(struct sctp_tcb *stcb,
167 struct sctp_nets *net,
170 /* Find and return an alternate network if possible */
171 struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL;
174 /* JRS 5/14/07 - Initialize min_errors to an impossible value. */
176 uint32_t max_cwnd = 0;
178 if (stcb->asoc.numnets == 1) {
179 /* No others but net */
180 return (TAILQ_FIRST(&stcb->asoc.nets));
183 * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate
184 * net algorithm. This algorithm chooses the active destination (not
185 * in PF state) with the largest cwnd value. If all destinations are
186 * in PF state, unreachable, or unconfirmed, choose the desination
187 * that is in PF state with the lowest error count. In case of a
188 * tie, choose the destination that was most recently active.
191 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
193 * JRS 5/14/07 - If the destination is unreachable
194 * or unconfirmed, skip it.
196 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
197 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
201 * JRS 5/14/07 - If the destination is reachable
202 * but in PF state, compare the error count of the
203 * destination to the minimum error count seen thus
204 * far. Store the destination with the lower error
205 * count. If the error counts are equal, store the
206 * destination that was most recently active.
208 if (mnet->dest_state & SCTP_ADDR_PF) {
210 * JRS 5/14/07 - If the destination under
211 * consideration is the current destination,
212 * work as if the error count is one higher.
213 * The actual error count will not be
214 * incremented until later in the t3
218 if (min_errors == -1) {
219 min_errors = mnet->error_count + 1;
220 min_errors_net = mnet;
221 } else if (mnet->error_count + 1 < min_errors) {
222 min_errors = mnet->error_count + 1;
223 min_errors_net = mnet;
224 } else if (mnet->error_count + 1 == min_errors
225 && mnet->last_active > min_errors_net->last_active) {
226 min_errors_net = mnet;
227 min_errors = mnet->error_count + 1;
231 if (min_errors == -1) {
232 min_errors = mnet->error_count;
233 min_errors_net = mnet;
234 } else if (mnet->error_count < min_errors) {
235 min_errors = mnet->error_count;
236 min_errors_net = mnet;
237 } else if (mnet->error_count == min_errors
238 && mnet->last_active > min_errors_net->last_active) {
239 min_errors_net = mnet;
240 min_errors = mnet->error_count;
246 * JRS 5/14/07 - If the destination is reachable and
247 * not in PF state, compare the cwnd of the
248 * destination to the highest cwnd seen thus far.
249 * Store the destination with the higher cwnd value.
250 * If the cwnd values are equal, randomly choose one
251 * of the two destinations.
253 if (max_cwnd < mnet->cwnd) {
255 max_cwnd = mnet->cwnd;
256 } else if (max_cwnd == mnet->cwnd) {
260 if (stcb->asoc.hb_random_idx > 3) {
261 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
262 memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values));
263 this_random = stcb->asoc.hb_random_values[0];
264 stcb->asoc.hb_random_idx++;
265 stcb->asoc.hb_ect_randombit = 0;
267 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
268 stcb->asoc.hb_random_idx++;
269 stcb->asoc.hb_ect_randombit = 0;
271 if (this_random % 2 == 1) {
273 max_cwnd = mnet->cwnd; /* Useless? */
277 if (max_cwnd_net == NULL) {
278 if (min_errors_net == NULL) {
281 return (min_errors_net);
283 return (max_cwnd_net);
287 * JRS 5/14/07 - If mode is set to 1, use the CMT policy for
288 * choosing an alternate net.
290 else if (mode == 1) {
291 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
292 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
293 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
295 * will skip ones that are not-reachable or
300 if (max_cwnd < mnet->cwnd) {
302 max_cwnd = mnet->cwnd;
303 } else if (max_cwnd == mnet->cwnd) {
307 if (stcb->asoc.hb_random_idx > 3) {
308 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
309 memcpy(stcb->asoc.hb_random_values, &rndval,
310 sizeof(stcb->asoc.hb_random_values));
311 this_random = stcb->asoc.hb_random_values[0];
312 stcb->asoc.hb_random_idx = 0;
313 stcb->asoc.hb_ect_randombit = 0;
315 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
316 stcb->asoc.hb_random_idx++;
317 stcb->asoc.hb_ect_randombit = 0;
319 if (this_random % 2) {
321 max_cwnd = mnet->cwnd;
326 return (max_cwnd_net);
333 mnet = TAILQ_FIRST(&stcb->asoc.nets);
339 alt = TAILQ_NEXT(mnet, sctp_next);
345 alt = TAILQ_FIRST(&stcb->asoc.nets);
350 if (alt->ro.ro_rt == NULL) {
351 if (alt->ro._s_addr) {
352 sctp_free_ifa(alt->ro._s_addr);
353 alt->ro._s_addr = NULL;
355 alt->src_addr_selected = 0;
357 /* sa_ignore NO_NULL_CHK */
358 if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
359 (alt->ro.ro_rt != NULL) &&
360 (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) {
361 /* Found a reachable address */
365 } while (alt != NULL);
368 /* Case where NO insv network exists (dormant state) */
369 /* we rotate destinations */
374 return (TAILQ_FIRST(&stcb->asoc.nets));
376 alt = TAILQ_NEXT(mnet, sctp_next);
382 alt = TAILQ_FIRST(&stcb->asoc.nets);
384 /* sa_ignore NO_NULL_CHK */
385 if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
387 /* Found an alternate address */
391 } while (alt != NULL);
400 sctp_backoff_on_timeout(struct sctp_tcb *stcb,
401 struct sctp_nets *net,
403 int num_marked, int num_abandoned)
406 net->RTO = stcb->asoc.minrto;
409 if (net->RTO > stcb->asoc.maxrto) {
410 net->RTO = stcb->asoc.maxrto;
412 if ((win_probe == 0) && (num_marked || num_abandoned)) {
413 /* We don't apply penalty to window probe scenarios */
414 /* JRS - Use the congestion control given in the CC module */
415 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net);
421 sctp_recover_sent_list(struct sctp_tcb *stcb)
423 struct sctp_tmit_chunk *chk, *nchk;
424 struct sctp_association *asoc;
427 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
428 if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) {
429 SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n",
430 (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq);
431 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
432 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
433 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
436 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
437 if (PR_SCTP_ENABLED(chk->flags)) {
438 if (asoc->pr_sctp_cnt != 0)
442 /* sa_ignore NO_NULL_CHK */
443 sctp_free_bufspace(stcb, asoc, chk, 1);
444 sctp_m_freem(chk->data);
446 if (asoc->peer_supports_prsctp && PR_SCTP_BUF_ENABLED(chk->flags)) {
447 asoc->sent_queue_cnt_removeable--;
450 asoc->sent_queue_cnt--;
451 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
454 SCTP_PRINTF("after recover order is as follows\n");
455 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
456 SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq);
463 sctp_mark_all_for_resend(struct sctp_tcb *stcb,
464 struct sctp_nets *net,
465 struct sctp_nets *alt,
472 * Mark all chunks (well not all) that were sent to *net for
473 * retransmission. Move them to alt for there destination as well...
474 * We only mark chunks that have been outstanding long enough to
475 * have received feed-back.
477 struct sctp_tmit_chunk *chk, *nchk;
478 struct sctp_nets *lnets;
479 struct timeval now, min_wait, tv;
482 int audit_tf, num_mk, fir;
484 uint32_t orig_flight, orig_tf;
485 uint32_t tsnlast, tsnfirst;
486 int recovery_cnt = 0;
489 /* none in flight now */
493 * figure out how long a data chunk must be pending before we can
496 (void)SCTP_GETTIME_TIMEVAL(&now);
497 /* get cur rto in micro-seconds */
498 cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
500 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
502 stcb->asoc.peers_rwnd,
504 SCTP_FR_T3_MARK_TIME);
505 sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT);
506 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
508 tv.tv_sec = cur_rto / 1000000;
509 tv.tv_usec = cur_rto % 1000000;
511 timevalsub(&min_wait, &tv);
512 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
514 * if we hit here, we don't have enough seconds on the clock
515 * to account for the RTO. We just let the lower seconds be
516 * the bounds and don't worry about it. This may mean we
517 * will mark a lot more than we should.
519 min_wait.tv_sec = min_wait.tv_usec = 0;
521 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
522 sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
523 sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
526 * Our rwnd will be incorrect here since we are not adding back the
527 * cnt * mbuf but we will fix that down below.
529 orig_flight = net->flight_size;
530 orig_tf = stcb->asoc.total_flight;
532 net->fast_retran_ip = 0;
533 /* Now on to each chunk */
536 tsnfirst = tsnlast = 0;
540 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) {
541 if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) {
542 /* Strange case our list got out of order? */
543 SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n",
544 (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq);
547 panic("last acked >= chk on sent-Q");
549 SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
550 sctp_recover_sent_list(stcb);
551 if (recovery_cnt < 10) {
554 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
558 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
560 * found one to mark: If it is less than
561 * DATAGRAM_ACKED it MUST not be a skipped or marked
562 * TSN but instead one that is either already set
563 * for retransmission OR one that needs
567 /* validate its been outstanding long enough */
568 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
569 sctp_log_fr(chk->rec.data.TSN_seq,
570 chk->sent_rcv_time.tv_sec,
571 chk->sent_rcv_time.tv_usec,
572 SCTP_FR_T3_MARK_TIME);
574 if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
576 * we have reached a chunk that was sent
577 * some seconds past our min.. forget it we
578 * will find no more to send.
580 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
582 chk->sent_rcv_time.tv_sec,
583 chk->sent_rcv_time.tv_usec,
587 } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
588 (window_probe == 0)) {
590 * we must look at the micro seconds to
593 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
595 * ok it was sent after our boundary
601 if (stcb->asoc.peer_supports_prsctp && PR_SCTP_TTL_ENABLED(chk->flags)) {
603 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
606 (void)sctp_release_pr_sctp_chunk(stcb,
615 if (stcb->asoc.peer_supports_prsctp && PR_SCTP_RTX_ENABLED(chk->flags)) {
616 /* Has it been retransmitted tv_sec times? */
617 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) {
619 (void)sctp_release_pr_sctp_chunk(stcb,
628 if (chk->sent < SCTP_DATAGRAM_RESEND) {
629 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
633 tsnfirst = chk->rec.data.TSN_seq;
635 tsnlast = chk->rec.data.TSN_seq;
636 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
637 sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count,
638 0, SCTP_FR_T3_MARKED);
640 if (chk->rec.data.chunk_was_revoked) {
641 /* deflate the cwnd */
642 chk->whoTo->cwnd -= chk->book_size;
643 chk->rec.data.chunk_was_revoked = 0;
645 net->marked_retrans++;
646 stcb->asoc.marked_retrans++;
647 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
648 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO,
649 chk->whoTo->flight_size,
651 (uintptr_t) chk->whoTo,
652 chk->rec.data.TSN_seq);
654 sctp_flight_size_decrease(chk);
655 sctp_total_flight_decrease(stcb, chk);
656 stcb->asoc.peers_rwnd += chk->send_size;
657 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
659 chk->sent = SCTP_DATAGRAM_RESEND;
660 SCTP_STAT_INCR(sctps_markedretrans);
662 /* reset the TSN for striking and other FR stuff */
663 chk->rec.data.doing_fast_retransmit = 0;
664 /* Clear any time so NO RTT is being done */
667 if (chk->whoTo->rto_needed == 0) {
668 chk->whoTo->rto_needed = 1;
673 sctp_free_remote_addr(chk->whoTo);
674 chk->no_fr_allowed = 1;
676 atomic_add_int(&alt->ref_count, 1);
678 chk->no_fr_allowed = 0;
679 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
680 chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
682 chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
686 * CMT: Do not allow FRs on retransmitted TSNs.
688 if (stcb->asoc.sctp_cmt_on_off > 0) {
689 chk->no_fr_allowed = 1;
691 #ifdef THIS_SHOULD_NOT_BE_DONE
692 } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
693 /* remember highest acked one */
697 if (chk->sent == SCTP_DATAGRAM_RESEND) {
701 if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
702 /* we did not subtract the same things? */
705 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
706 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
710 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
712 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n",
713 num_mk, (u_long)stcb->asoc.peers_rwnd);
714 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
716 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n",
718 (int)stcb->asoc.peers_rwnd);
721 *num_marked = num_mk;
722 *num_abandoned = cnt_abandoned;
724 * Now check for a ECN Echo that may be stranded And include the
725 * cnt_mk'd to have all resends in the control queue.
727 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
728 if (chk->sent == SCTP_DATAGRAM_RESEND) {
731 if ((chk->whoTo == net) &&
732 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
733 sctp_free_remote_addr(chk->whoTo);
735 if (chk->sent != SCTP_DATAGRAM_RESEND) {
736 chk->sent = SCTP_DATAGRAM_RESEND;
737 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
740 atomic_add_int(&alt->ref_count, 1);
743 #ifdef THIS_SHOULD_NOT_BE_DONE
744 if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) {
745 /* fix it so we retransmit the highest acked anyway */
746 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
748 could_be_sent->sent = SCTP_DATAGRAM_RESEND;
751 if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
753 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n",
754 cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk);
756 #ifndef SCTP_AUDITING_ENABLED
757 stcb->asoc.sent_queue_retran_cnt = cnt_mk;
761 SCTPDBG(SCTP_DEBUG_TIMER4,
762 "Audit total flight due to negative value net:%p\n",
764 stcb->asoc.total_flight = 0;
765 stcb->asoc.total_flight_count = 0;
766 /* Clear all networks flight size */
767 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) {
768 lnets->flight_size = 0;
769 SCTPDBG(SCTP_DEBUG_TIMER4,
770 "Net:%p c-f cwnd:%d ssthresh:%d\n",
771 (void *)lnets, lnets->cwnd, lnets->ssthresh);
773 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
774 if (chk->sent < SCTP_DATAGRAM_RESEND) {
775 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
776 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
777 chk->whoTo->flight_size,
779 (uintptr_t) chk->whoTo,
780 chk->rec.data.TSN_seq);
782 sctp_flight_size_increase(chk);
783 sctp_total_flight_increase(stcb, chk);
787 /* We return 1 if we only have a window probe outstanding */
793 sctp_t3rxt_timer(struct sctp_inpcb *inp,
794 struct sctp_tcb *stcb,
795 struct sctp_nets *net)
797 struct sctp_nets *alt;
798 int win_probe, num_mk, num_abandoned;
800 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
801 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
803 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
804 struct sctp_nets *lnet;
806 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
808 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
810 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
814 /* Find an alternate and mark those for retransmission */
815 if ((stcb->asoc.peers_rwnd == 0) &&
816 (stcb->asoc.total_flight < net->mtu)) {
817 SCTP_STAT_INCR(sctps_timowindowprobe);
823 if (win_probe == 0) {
824 /* We don't do normal threshold management on window probes */
825 if (sctp_threshold_management(inp, stcb, net,
826 stcb->asoc.max_send_times)) {
827 /* Association was destroyed */
830 if (net != stcb->asoc.primary_destination) {
831 /* send a immediate HB if our RTO is stale */
833 unsigned int ms_goneby;
835 (void)SCTP_GETTIME_TIMEVAL(&now);
836 if (net->last_sent_time.tv_sec) {
837 ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000;
841 if ((net->dest_state & SCTP_ADDR_PF) == 0) {
842 if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
844 * no recent feed back in an
845 * RTO or more, request a
848 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
855 * For a window probe we don't penalize the net's but only
856 * the association. This may fail it if SACKs are not coming
857 * back. If sack's are coming with rwnd locked at 0, we will
858 * continue to hold things waiting for rwnd to raise
860 if (sctp_threshold_management(inp, stcb, NULL,
861 stcb->asoc.max_send_times)) {
862 /* Association was destroyed */
866 if (stcb->asoc.sctp_cmt_on_off > 0) {
867 if (net->pf_threshold < net->failure_threshold) {
868 alt = sctp_find_alternate_net(stcb, net, 2);
871 * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is
872 * being used, then pick dest with largest ssthresh
873 * for any retransmission.
875 alt = sctp_find_alternate_net(stcb, net, 1);
877 * CUCv2: If a different dest is picked for the
878 * retransmission, then new (rtx-)pseudo_cumack
879 * needs to be tracked for orig dest. Let CUCv2
880 * track new (rtx-) pseudo-cumack always.
882 net->find_pseudo_cumack = 1;
883 net->find_rtx_pseudo_cumack = 1;
886 alt = sctp_find_alternate_net(stcb, net, 0);
891 (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe,
892 &num_mk, &num_abandoned);
893 /* FR Loss recovery just ended with the T3. */
894 stcb->asoc.fast_retran_loss_recovery = 0;
896 /* CMT FR loss recovery ended with the T3 */
897 net->fast_retran_loss_recovery = 0;
898 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
899 (net->flight_size == 0)) {
900 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
903 * setup the sat loss recovery that prevents satellite cwnd advance.
905 stcb->asoc.sat_t3_loss_recovery = 1;
906 stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
908 /* Backoff the timer and cwnd */
909 sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned);
910 if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
911 (net->dest_state & SCTP_ADDR_PF)) {
912 /* Move all pending over too */
913 sctp_move_chunks_from_net(stcb, net);
916 * Get the address that failed, to force a new src address
917 * selecton and a route allocation.
919 if (net->ro._s_addr) {
920 sctp_free_ifa(net->ro._s_addr);
921 net->ro._s_addr = NULL;
923 net->src_addr_selected = 0;
925 /* Force a route allocation too */
927 RTFREE(net->ro.ro_rt);
928 net->ro.ro_rt = NULL;
930 /* Was it our primary? */
931 if ((stcb->asoc.primary_destination == net) && (alt != net)) {
933 * Yes, note it as such and find an alternate note:
934 * this means HB code must use this to resent the
935 * primary if it goes active AND if someone does a
936 * change-primary then this flag must be cleared
937 * from any net structures.
939 if (stcb->asoc.alternate) {
940 sctp_free_remote_addr(stcb->asoc.alternate);
942 stcb->asoc.alternate = alt;
943 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
947 * Special case for cookie-echo'ed case, we don't do output but must
948 * await the COOKIE-ACK before retransmission
950 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
952 * Here we just reset the timer and start again since we
953 * have not established the asoc
955 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
958 if (stcb->asoc.peer_supports_prsctp) {
959 struct sctp_tmit_chunk *lchk;
961 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc);
962 /* C3. See if we need to send a Fwd-TSN */
963 if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) {
964 send_forward_tsn(stcb, &stcb->asoc);
966 /* Assure a timer is up */
967 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
971 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) {
972 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
978 sctp_t1init_timer(struct sctp_inpcb *inp,
979 struct sctp_tcb *stcb,
980 struct sctp_nets *net)
982 /* bump the thresholds */
983 if (stcb->asoc.delayed_connection) {
985 * special hook for delayed connection. The library did NOT
986 * complete the rest of its sends.
988 stcb->asoc.delayed_connection = 0;
989 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
992 if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) {
995 if (sctp_threshold_management(inp, stcb, net,
996 stcb->asoc.max_init_times)) {
997 /* Association was destroyed */
1000 stcb->asoc.dropped_special_cnt = 0;
1001 sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0);
1002 if (stcb->asoc.initial_init_rto_max < net->RTO) {
1003 net->RTO = stcb->asoc.initial_init_rto_max;
1005 if (stcb->asoc.numnets > 1) {
1006 /* If we have more than one addr use it */
1007 struct sctp_nets *alt;
1009 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0);
1010 if (alt != stcb->asoc.primary_destination) {
1011 sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination);
1012 stcb->asoc.primary_destination = alt;
1015 /* Send out a new init */
1016 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1021 * For cookie and asconf we actually need to find and mark for resend, then
1022 * increment the resend counter (after all the threshold management stuff of
1026 sctp_cookie_timer(struct sctp_inpcb *inp,
1027 struct sctp_tcb *stcb,
1028 struct sctp_nets *net SCTP_UNUSED)
1030 struct sctp_nets *alt;
1031 struct sctp_tmit_chunk *cookie;
1033 /* first before all else we must find the cookie */
1034 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) {
1035 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
1039 if (cookie == NULL) {
1040 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
1042 struct mbuf *op_err;
1044 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION,
1045 "Cookie timer expired, but no cookie");
1046 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_4;
1047 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
1050 panic("Cookie timer expires in wrong state?");
1052 SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc));
1058 /* Ok we found the cookie, threshold management next */
1059 if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1060 stcb->asoc.max_init_times)) {
1065 * cleared theshold management now lets backoff the address & select
1068 stcb->asoc.dropped_special_cnt = 0;
1069 sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0);
1070 alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0);
1071 if (alt != cookie->whoTo) {
1072 sctp_free_remote_addr(cookie->whoTo);
1073 cookie->whoTo = alt;
1074 atomic_add_int(&alt->ref_count, 1);
1076 /* Now mark the retran info */
1077 if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1078 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1080 cookie->sent = SCTP_DATAGRAM_RESEND;
1082 * Now call the output routine to kick out the cookie again, Note we
1083 * don't mark any chunks for retran so that FR will need to kick in
1084 * to move these (or a send timer).
1090 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1091 struct sctp_nets *net)
1093 struct sctp_nets *alt;
1094 struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1096 if (stcb->asoc.stream_reset_outstanding == 0) {
1099 /* find the existing STRRESET, we use the seq number we sent out on */
1100 (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
1101 if (strrst == NULL) {
1104 /* do threshold management */
1105 if (sctp_threshold_management(inp, stcb, strrst->whoTo,
1106 stcb->asoc.max_send_times)) {
1111 * cleared theshold management now lets backoff the address & select
1114 sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0);
1115 alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0);
1116 sctp_free_remote_addr(strrst->whoTo);
1117 strrst->whoTo = alt;
1118 atomic_add_int(&alt->ref_count, 1);
1120 /* See if a ECN Echo is also stranded */
1121 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1122 if ((chk->whoTo == net) &&
1123 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1124 sctp_free_remote_addr(chk->whoTo);
1125 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1126 chk->sent = SCTP_DATAGRAM_RESEND;
1127 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1130 atomic_add_int(&alt->ref_count, 1);
1133 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1135 * If the address went un-reachable, we need to move to
1136 * alternates for ALL chk's in queue
1138 sctp_move_chunks_from_net(stcb, net);
1140 /* mark the retran info */
1141 if (strrst->sent != SCTP_DATAGRAM_RESEND)
1142 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1143 strrst->sent = SCTP_DATAGRAM_RESEND;
1145 /* restart the timer */
1146 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo);
1151 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1152 struct sctp_nets *net)
1154 struct sctp_nets *alt;
1155 struct sctp_tmit_chunk *asconf, *chk;
1157 /* is this a first send, or a retransmission? */
1158 if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) {
1159 /* compose a new ASCONF chunk and send it */
1160 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1163 * Retransmission of the existing ASCONF is needed
1166 /* find the existing ASCONF */
1167 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1168 if (asconf == NULL) {
1171 /* do threshold management */
1172 if (sctp_threshold_management(inp, stcb, asconf->whoTo,
1173 stcb->asoc.max_send_times)) {
1177 if (asconf->snd_count > stcb->asoc.max_send_times) {
1179 * Something is rotten: our peer is not responding
1180 * to ASCONFs but apparently is to other chunks.
1181 * i.e. it is not properly handling the chunk type
1182 * upper bits. Mark this peer as ASCONF incapable
1185 SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1186 sctp_asconf_cleanup(stcb, net);
1190 * cleared threshold management, so now backoff the net and
1191 * select an alternate
1193 sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0);
1194 alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0);
1195 if (asconf->whoTo != alt) {
1196 sctp_free_remote_addr(asconf->whoTo);
1197 asconf->whoTo = alt;
1198 atomic_add_int(&alt->ref_count, 1);
1200 /* See if an ECN Echo is also stranded */
1201 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1202 if ((chk->whoTo == net) &&
1203 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1204 sctp_free_remote_addr(chk->whoTo);
1206 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1207 chk->sent = SCTP_DATAGRAM_RESEND;
1208 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1210 atomic_add_int(&alt->ref_count, 1);
1213 TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1214 if (chk->whoTo != alt) {
1215 sctp_free_remote_addr(chk->whoTo);
1217 atomic_add_int(&alt->ref_count, 1);
1219 if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT)
1220 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1221 chk->sent = SCTP_DATAGRAM_RESEND;
1223 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1225 * If the address went un-reachable, we need to move
1226 * to the alternate for ALL chunks in queue
1228 sctp_move_chunks_from_net(stcb, net);
1230 /* mark the retran info */
1231 if (asconf->sent != SCTP_DATAGRAM_RESEND)
1232 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1233 asconf->sent = SCTP_DATAGRAM_RESEND;
1235 /* send another ASCONF if any and we can do */
1236 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1241 /* Mobility adaptation */
1243 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1244 struct sctp_nets *net SCTP_UNUSED)
1246 if (stcb->asoc.deleted_primary == NULL) {
1247 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n");
1248 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1251 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary ");
1252 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1253 sctp_free_remote_addr(stcb->asoc.deleted_primary);
1254 stcb->asoc.deleted_primary = NULL;
1255 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1260 * For the shutdown and shutdown-ack, we do not keep one around on the
1261 * control queue. This means we must generate a new one and call the general
1262 * chunk output routine, AFTER having done threshold management.
1263 * It is assumed that net is non-NULL.
1266 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1267 struct sctp_nets *net)
1269 struct sctp_nets *alt;
1271 /* first threshold managment */
1272 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1276 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1277 /* second select an alternative */
1278 alt = sctp_find_alternate_net(stcb, net, 0);
1280 /* third generate a shutdown into the queue for out net */
1281 sctp_send_shutdown(stcb, alt);
1283 /* fourth restart timer */
1284 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1289 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1290 struct sctp_nets *net)
1292 struct sctp_nets *alt;
1294 /* first threshold managment */
1295 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1299 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1300 /* second select an alternative */
1301 alt = sctp_find_alternate_net(stcb, net, 0);
1303 /* third generate a shutdown into the queue for out net */
1304 sctp_send_shutdown_ack(stcb, alt);
1306 /* fourth restart timer */
1307 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1312 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp,
1313 struct sctp_tcb *stcb)
1315 struct sctp_stream_queue_pending *sp;
1316 unsigned int i, chks_in_queue = 0;
1317 int being_filled = 0;
1320 * This function is ONLY called when the send/sent queues are empty.
1322 if ((stcb == NULL) || (inp == NULL))
1325 if (stcb->asoc.sent_queue_retran_cnt) {
1326 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n",
1327 stcb->asoc.sent_queue_retran_cnt);
1328 stcb->asoc.sent_queue_retran_cnt = 0;
1330 if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1331 /* No stream scheduler information, initialize scheduler */
1332 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0);
1333 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1334 /* yep, we lost a stream or two */
1335 SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n");
1337 /* no streams lost */
1338 stcb->asoc.total_output_queue_size = 0;
1341 /* Check to see if some data queued, if so report it */
1342 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1343 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
1344 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
1345 if (sp->msg_is_complete)
1351 if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
1352 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n",
1353 stcb->asoc.stream_queue_cnt, chks_in_queue);
1355 if (chks_in_queue) {
1356 /* call the output queue function */
1357 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1358 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1359 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1361 * Probably should go in and make it go back through
1362 * and add fragments allowed
1364 if (being_filled == 0) {
1365 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1370 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n",
1371 (u_long)stcb->asoc.total_output_queue_size);
1372 stcb->asoc.total_output_queue_size = 0;
1377 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1378 struct sctp_nets *net)
1382 if (net->dest_state & SCTP_ADDR_PF) {
1387 if (net->hb_responded == 0) {
1388 if (net->ro._s_addr) {
1390 * Invalidate the src address if we did not get a
1391 * response last time.
1393 sctp_free_ifa(net->ro._s_addr);
1394 net->ro._s_addr = NULL;
1395 net->src_addr_selected = 0;
1397 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1398 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1403 /* Zero PBA, if it needs it */
1404 if (net->partial_bytes_acked) {
1405 net->partial_bytes_acked = 0;
1407 if ((stcb->asoc.total_output_queue_size > 0) &&
1408 (TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1409 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1410 sctp_audit_stream_queues_for_size(inp, stcb);
1412 if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1413 !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1415 * when move to PF during threshold mangement, a HB has been
1416 * queued in that routine
1418 uint32_t ms_gone_by;
1420 if ((net->last_sent_time.tv_sec > 0) ||
1421 (net->last_sent_time.tv_usec > 0)) {
1422 struct timeval diff;
1424 SCTP_GETTIME_TIMEVAL(&diff);
1425 timevalsub(&diff, &net->last_sent_time);
1426 ms_gone_by = (uint32_t) (diff.tv_sec * 1000) +
1427 (uint32_t) (diff.tv_usec / 1000);
1429 ms_gone_by = 0xffffffff;
1431 if ((ms_gone_by >= net->heart_beat_delay) ||
1432 (net->dest_state & SCTP_ADDR_PF)) {
1433 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1440 sctp_pathmtu_timer(struct sctp_inpcb *inp,
1441 struct sctp_tcb *stcb,
1442 struct sctp_nets *net)
1444 uint32_t next_mtu, mtu;
1446 next_mtu = sctp_get_next_mtu(net->mtu);
1448 if ((next_mtu > net->mtu) && (net->port == 0)) {
1449 if ((net->src_addr_selected == 0) ||
1450 (net->ro._s_addr == NULL) ||
1451 (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1452 if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1453 sctp_free_ifa(net->ro._s_addr);
1454 net->ro._s_addr = NULL;
1455 net->src_addr_selected = 0;
1456 } else if (net->ro._s_addr == NULL) {
1457 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1458 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1459 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1461 /* KAME hack: embed scopeid */
1462 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1466 net->ro._s_addr = sctp_source_address_selection(inp,
1468 (sctp_route_t *) & net->ro,
1469 net, 0, stcb->asoc.vrf_id);
1470 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1471 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1472 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1474 (void)sa6_recoverscope(sin6);
1478 if (net->ro._s_addr)
1479 net->src_addr_selected = 1;
1481 if (net->ro._s_addr) {
1482 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt);
1484 mtu -= sizeof(struct udphdr);
1486 if (mtu > next_mtu) {
1487 net->mtu = next_mtu;
1491 /* restart the timer */
1492 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1496 sctp_autoclose_timer(struct sctp_inpcb *inp,
1497 struct sctp_tcb *stcb,
1498 struct sctp_nets *net)
1500 struct timeval tn, *tim_touse;
1501 struct sctp_association *asoc;
1504 (void)SCTP_GETTIME_TIMEVAL(&tn);
1505 if (stcb->asoc.sctp_autoclose_ticks &&
1506 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1507 /* Auto close is on */
1509 /* pick the time to use */
1510 if (asoc->time_last_rcvd.tv_sec >
1511 asoc->time_last_sent.tv_sec) {
1512 tim_touse = &asoc->time_last_rcvd;
1514 tim_touse = &asoc->time_last_sent;
1516 /* Now has long enough transpired to autoclose? */
1517 ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec);
1518 if ((ticks_gone_by > 0) &&
1519 (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) {
1521 * autoclose time has hit, call the output routine,
1522 * which should do nothing just to be SURE we don't
1523 * have hanging data. We can then safely check the
1524 * queues and know that we are clear to send
1527 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1529 if (TAILQ_EMPTY(&asoc->send_queue) &&
1530 TAILQ_EMPTY(&asoc->sent_queue)) {
1532 * there is nothing queued to send, so I'm
1535 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1536 /* only send SHUTDOWN 1st time thru */
1537 struct sctp_nets *netp;
1539 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
1540 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1541 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1543 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
1544 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
1545 sctp_stop_timers_for_shutdown(stcb);
1546 if (stcb->asoc.alternate) {
1547 netp = stcb->asoc.alternate;
1549 netp = stcb->asoc.primary_destination;
1551 sctp_send_shutdown(stcb, netp);
1552 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1553 stcb->sctp_ep, stcb,
1555 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1556 stcb->sctp_ep, stcb,
1562 * No auto close at this time, reset t-o to check
1567 /* fool the timer startup to use the time left */
1568 tmp = asoc->sctp_autoclose_ticks;
1569 asoc->sctp_autoclose_ticks -= ticks_gone_by;
1570 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1572 /* restore the real tick value */
1573 asoc->sctp_autoclose_ticks = tmp;