sys/netinet/sctp_timer.c

   1 /*-
   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.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  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.
  15  *
  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.
  19  *
  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.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #define _IP_VHL
  37 #include <netinet/sctp_os.h>
  38 #include <netinet/sctp_pcb.h>
  39 #ifdef INET6
  40 #endif
  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>
  54 #endif
  55
  56
  57 void
  58 sctp_audit_retranmission_queue(struct sctp_association *asoc)
  59 {
  60         struct sctp_tmit_chunk *chk;
  61
  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);
  70                 }
  71                 asoc->sent_queue_cnt++;
  72         }
  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);
  76                 }
  77         }
  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);
  81                 }
  82         }
  83         SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n",
  84             asoc->sent_queue_retran_cnt,
  85             asoc->sent_queue_cnt);
  86 }
  87
  88 int
  89 sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
  90     struct sctp_nets *net, uint16_t threshold)
  91 {
  92         if (net) {
  93                 net->error_count++;
  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,
 104                                     stcb, 0,
 105                                     (void *)net, SCTP_SO_NOT_LOCKED);
 106                         }
 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, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_TIMER + SCTP_LOC_3);
 114                                 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
 115                         }
 116                 }
 117         }
 118         if (stcb == NULL)
 119                 return (0);
 120
 121         if (net) {
 122                 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) {
 123                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
 124                                 sctp_misc_ints(SCTP_THRESHOLD_INCR,
 125                                     stcb->asoc.overall_error_count,
 126                                     (stcb->asoc.overall_error_count + 1),
 127                                     SCTP_FROM_SCTP_TIMER,
 128                                     __LINE__);
 129                         }
 130                         stcb->asoc.overall_error_count++;
 131                 }
 132         } else {
 133                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
 134                         sctp_misc_ints(SCTP_THRESHOLD_INCR,
 135                             stcb->asoc.overall_error_count,
 136                             (stcb->asoc.overall_error_count + 1),
 137                             SCTP_FROM_SCTP_TIMER,
 138                             __LINE__);
 139                 }
 140                 stcb->asoc.overall_error_count++;
 141         }
 142         SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n",
 143             (void *)&stcb->asoc, stcb->asoc.overall_error_count,
 144             (uint32_t) threshold,
 145             ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state));
 146         /*
 147          * We specifically do not do >= to give the assoc one more change
 148          * before we fail it.
 149          */
 150         if (stcb->asoc.overall_error_count > threshold) {
 151                 /* Abort notification sends a ULP notify */
 152                 struct mbuf *op_err;
 153
 154                 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION,
 155                     "Association error couter exceeded");
 156                 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1;
 157                 sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
 158                 return (1);
 159         }
 160         return (0);
 161 }
 162
 163 /*
 164  * sctp_find_alternate_net() returns a non-NULL pointer as long
 165  * the argument net is non-NULL.
 166  */
 167 struct sctp_nets *
 168 sctp_find_alternate_net(struct sctp_tcb *stcb,
 169     struct sctp_nets *net,
 170     int mode)
 171 {
 172         /* Find and return an alternate network if possible */
 173         struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL;
 174         int once;
 175
 176         /* JRS 5/14/07 - Initialize min_errors to an impossible value. */
 177         int min_errors = -1;
 178         uint32_t max_cwnd = 0;
 179
 180         if (stcb->asoc.numnets == 1) {
 181                 /* No others but net */
 182                 return (TAILQ_FIRST(&stcb->asoc.nets));
 183         }
 184         /*
 185          * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate
 186          * net algorithm. This algorithm chooses the active destination (not
 187          * in PF state) with the largest cwnd value. If all destinations are
 188          * in PF state, unreachable, or unconfirmed, choose the desination
 189          * that is in PF state with the lowest error count. In case of a
 190          * tie, choose the destination that was most recently active.
 191          */
 192         if (mode == 2) {
 193                 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
 194                         /*
 195                          * JRS 5/14/07 - If the destination is unreachable
 196                          * or unconfirmed, skip it.
 197                          */
 198                         if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
 199                             (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
 200                                 continue;
 201                         }
 202                         /*
 203                          * JRS 5/14/07 -  If the destination is reachable
 204                          * but in PF state, compare the error count of the
 205                          * destination to the minimum error count seen thus
 206                          * far. Store the destination with the lower error
 207                          * count.  If the error counts are equal, store the
 208                          * destination that was most recently active.
 209                          */
 210                         if (mnet->dest_state & SCTP_ADDR_PF) {
 211                                 /*
 212                                  * JRS 5/14/07 - If the destination under
 213                                  * consideration is the current destination,
 214                                  * work as if the error count is one higher.
 215                                  * The actual error count will not be
 216                                  * incremented until later in the t3
 217                                  * handler.
 218                                  */
 219                                 if (mnet == net) {
 220                                         if (min_errors == -1) {
 221                                                 min_errors = mnet->error_count + 1;
 222                                                 min_errors_net = mnet;
 223                                         } else if (mnet->error_count + 1 < min_errors) {
 224                                                 min_errors = mnet->error_count + 1;
 225                                                 min_errors_net = mnet;
 226                                         } else if (mnet->error_count + 1 == min_errors
 227                                             && mnet->last_active > min_errors_net->last_active) {
 228                                                 min_errors_net = mnet;
 229                                                 min_errors = mnet->error_count + 1;
 230                                         }
 231                                         continue;
 232                                 } else {
 233                                         if (min_errors == -1) {
 234                                                 min_errors = mnet->error_count;
 235                                                 min_errors_net = mnet;
 236                                         } else if (mnet->error_count < min_errors) {
 237                                                 min_errors = mnet->error_count;
 238                                                 min_errors_net = mnet;
 239                                         } else if (mnet->error_count == min_errors
 240                                             && mnet->last_active > min_errors_net->last_active) {
 241                                                 min_errors_net = mnet;
 242                                                 min_errors = mnet->error_count;
 243                                         }
 244                                         continue;
 245                                 }
 246                         }
 247                         /*
 248                          * JRS 5/14/07 - If the destination is reachable and
 249                          * not in PF state, compare the cwnd of the
 250                          * destination to the highest cwnd seen thus far.
 251                          * Store the destination with the higher cwnd value.
 252                          * If the cwnd values are equal, randomly choose one
 253                          * of the two destinations.
 254                          */
 255                         if (max_cwnd < mnet->cwnd) {
 256                                 max_cwnd_net = mnet;
 257                                 max_cwnd = mnet->cwnd;
 258                         } else if (max_cwnd == mnet->cwnd) {
 259                                 uint32_t rndval;
 260                                 uint8_t this_random;
 261
 262                                 if (stcb->asoc.hb_random_idx > 3) {
 263                                         rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
 264                                         memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values));
 265                                         this_random = stcb->asoc.hb_random_values[0];
 266                                         stcb->asoc.hb_random_idx++;
 267                                         stcb->asoc.hb_ect_randombit = 0;
 268                                 } else {
 269                                         this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
 270                                         stcb->asoc.hb_random_idx++;
 271                                         stcb->asoc.hb_ect_randombit = 0;
 272                                 }
 273                                 if (this_random % 2 == 1) {
 274                                         max_cwnd_net = mnet;
 275                                         max_cwnd = mnet->cwnd;  /* Useless? */
 276                                 }
 277                         }
 278                 }
 279                 if (max_cwnd_net == NULL) {
 280                         if (min_errors_net == NULL) {
 281                                 return (net);
 282                         }
 283                         return (min_errors_net);
 284                 } else {
 285                         return (max_cwnd_net);
 286                 }
 287         }
 288         /*
 289          * JRS 5/14/07 - If mode is set to 1, use the CMT policy for
 290          * choosing an alternate net.
 291          */
 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)) {
 296                                 /*
 297                                  * will skip ones that are not-reachable or
 298                                  * unconfirmed
 299                                  */
 300                                 continue;
 301                         }
 302                         if (max_cwnd < mnet->cwnd) {
 303                                 max_cwnd_net = mnet;
 304                                 max_cwnd = mnet->cwnd;
 305                         } else if (max_cwnd == mnet->cwnd) {
 306                                 uint32_t rndval;
 307                                 uint8_t this_random;
 308
 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;
 316                                 } else {
 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;
 320                                 }
 321                                 if (this_random % 2) {
 322                                         max_cwnd_net = mnet;
 323                                         max_cwnd = mnet->cwnd;
 324                                 }
 325                         }
 326                 }
 327                 if (max_cwnd_net) {
 328                         return (max_cwnd_net);
 329                 }
 330         }
 331         mnet = net;
 332         once = 0;
 333
 334         if (mnet == NULL) {
 335                 mnet = TAILQ_FIRST(&stcb->asoc.nets);
 336                 if (mnet == NULL) {
 337                         return (NULL);
 338                 }
 339         }
 340         for (;;) {
 341                 alt = TAILQ_NEXT(mnet, sctp_next);
 342                 if (alt == NULL) {
 343                         once++;
 344                         if (once > 1) {
 345                                 break;
 346                         }
 347                         alt = TAILQ_FIRST(&stcb->asoc.nets);
 348                         if (alt == NULL) {
 349                                 return (NULL);
 350                         }
 351                 }
 352                 if (alt->ro.ro_rt == NULL) {
 353                         if (alt->ro._s_addr) {
 354                                 sctp_free_ifa(alt->ro._s_addr);
 355                                 alt->ro._s_addr = NULL;
 356                         }
 357                         alt->src_addr_selected = 0;
 358                 }
 359                 if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
 360                     (alt->ro.ro_rt != NULL) &&
 361                     (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) {
 362                         /* Found a reachable address */
 363                         break;
 364                 }
 365                 mnet = alt;
 366         }
 367
 368         if (alt == NULL) {
 369                 /* Case where NO insv network exists (dormant state) */
 370                 /* we rotate destinations */
 371                 once = 0;
 372                 mnet = net;
 373                 for (;;) {
 374                         if (mnet == NULL) {
 375                                 return (TAILQ_FIRST(&stcb->asoc.nets));
 376                         }
 377                         alt = TAILQ_NEXT(mnet, sctp_next);
 378                         if (alt == NULL) {
 379                                 once++;
 380                                 if (once > 1) {
 381                                         break;
 382                                 }
 383                                 alt = TAILQ_FIRST(&stcb->asoc.nets);
 384                                 if (alt == NULL) {
 385                                         break;
 386                                 }
 387                         }
 388                         if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
 389                             (alt != net)) {
 390                                 /* Found an alternate address */
 391                                 break;
 392                         }
 393                         mnet = alt;
 394                 }
 395         }
 396         if (alt == NULL) {
 397                 return (net);
 398         }
 399         return (alt);
 400 }
 401
 402 static void
 403 sctp_backoff_on_timeout(struct sctp_tcb *stcb,
 404     struct sctp_nets *net,
 405     int win_probe,
 406     int num_marked, int num_abandoned)
 407 {
 408         if (net->RTO == 0) {
 409                 net->RTO = stcb->asoc.minrto;
 410         }
 411         net->RTO <<= 1;
 412         if (net->RTO > stcb->asoc.maxrto) {
 413                 net->RTO = stcb->asoc.maxrto;
 414         }
 415         if ((win_probe == 0) && (num_marked || num_abandoned)) {
 416                 /* We don't apply penalty to window probe scenarios */
 417                 /* JRS - Use the congestion control given in the CC module */
 418                 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net);
 419         }
 420 }
 421
 422 #ifndef INVARIANTS
 423 static void
 424 sctp_recover_sent_list(struct sctp_tcb *stcb)
 425 {
 426         struct sctp_tmit_chunk *chk, *nchk;
 427         struct sctp_association *asoc;
 428
 429         asoc = &stcb->asoc;
 430         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
 431                 if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) {
 432                         SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n",
 433                             (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq);
 434                         if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
 435                                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
 436                                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
 437                                 }
 438                         }
 439                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 440                         if (PR_SCTP_ENABLED(chk->flags)) {
 441                                 if (asoc->pr_sctp_cnt != 0)
 442                                         asoc->pr_sctp_cnt--;
 443                         }
 444                         if (chk->data) {
 445                                 /* sa_ignore NO_NULL_CHK */
 446                                 sctp_free_bufspace(stcb, asoc, chk, 1);
 447                                 sctp_m_freem(chk->data);
 448                                 chk->data = NULL;
 449                                 if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) {
 450                                         asoc->sent_queue_cnt_removeable--;
 451                                 }
 452                         }
 453                         asoc->sent_queue_cnt--;
 454                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 455                 }
 456         }
 457         SCTP_PRINTF("after recover order is as follows\n");
 458         TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
 459                 SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq);
 460         }
 461 }
 462
 463 #endif
 464
 465 static int
 466 sctp_mark_all_for_resend(struct sctp_tcb *stcb,
 467     struct sctp_nets *net,
 468     struct sctp_nets *alt,
 469     int window_probe,
 470     int *num_marked,
 471     int *num_abandoned)
 472 {
 473
 474         /*
 475          * Mark all chunks (well not all) that were sent to *net for
 476          * retransmission. Move them to alt for there destination as well...
 477          * We only mark chunks that have been outstanding long enough to
 478          * have received feed-back.
 479          */
 480         struct sctp_tmit_chunk *chk, *nchk;
 481         struct sctp_nets *lnets;
 482         struct timeval now, min_wait, tv;
 483         int cur_rto;
 484         int cnt_abandoned;
 485         int audit_tf, num_mk, fir;
 486         unsigned int cnt_mk;
 487         uint32_t orig_flight, orig_tf;
 488         uint32_t tsnlast, tsnfirst;
 489         int recovery_cnt = 0;
 490
 491
 492         /* none in flight now */
 493         audit_tf = 0;
 494         fir = 0;
 495         /*
 496          * figure out how long a data chunk must be pending before we can
 497          * mark it ..
 498          */
 499         (void)SCTP_GETTIME_TIMEVAL(&now);
 500         /* get cur rto in micro-seconds */
 501         cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
 502         cur_rto *= 1000;
 503         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 504                 sctp_log_fr(cur_rto,
 505                     stcb->asoc.peers_rwnd,
 506                     window_probe,
 507                     SCTP_FR_T3_MARK_TIME);
 508                 sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT);
 509                 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
 510         }
 511         tv.tv_sec = cur_rto / 1000000;
 512         tv.tv_usec = cur_rto % 1000000;
 513         min_wait = now;
 514         timevalsub(&min_wait, &tv);
 515         if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
 516                 /*
 517                  * if we hit here, we don't have enough seconds on the clock
 518                  * to account for the RTO. We just let the lower seconds be
 519                  * the bounds and don't worry about it. This may mean we
 520                  * will mark a lot more than we should.
 521                  */
 522                 min_wait.tv_sec = min_wait.tv_usec = 0;
 523         }
 524         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 525                 sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
 526                 sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
 527         }
 528         /*
 529          * Our rwnd will be incorrect here since we are not adding back the
 530          * cnt * mbuf but we will fix that down below.
 531          */
 532         orig_flight = net->flight_size;
 533         orig_tf = stcb->asoc.total_flight;
 534
 535         net->fast_retran_ip = 0;
 536         /* Now on to each chunk */
 537         cnt_abandoned = 0;
 538         num_mk = cnt_mk = 0;
 539         tsnfirst = tsnlast = 0;
 540 #ifndef INVARIANTS
 541 start_again:
 542 #endif
 543         TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) {
 544                 if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) {
 545                         /* Strange case our list got out of order? */
 546                         SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n",
 547                             (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq);
 548                         recovery_cnt++;
 549 #ifdef INVARIANTS
 550                         panic("last acked >= chk on sent-Q");
 551 #else
 552                         SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
 553                         sctp_recover_sent_list(stcb);
 554                         if (recovery_cnt < 10) {
 555                                 goto start_again;
 556                         } else {
 557                                 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
 558                         }
 559 #endif
 560                 }
 561                 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
 562                         /*
 563                          * found one to mark: If it is less than
 564                          * DATAGRAM_ACKED it MUST not be a skipped or marked
 565                          * TSN but instead one that is either already set
 566                          * for retransmission OR one that needs
 567                          * retransmission.
 568                          */
 569
 570                         /* validate its been outstanding long enough */
 571                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 572                                 sctp_log_fr(chk->rec.data.TSN_seq,
 573                                     chk->sent_rcv_time.tv_sec,
 574                                     chk->sent_rcv_time.tv_usec,
 575                                     SCTP_FR_T3_MARK_TIME);
 576                         }
 577                         if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
 578                                 /*
 579                                  * we have reached a chunk that was sent
 580                                  * some seconds past our min.. forget it we
 581                                  * will find no more to send.
 582                                  */
 583                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 584                                         sctp_log_fr(0,
 585                                             chk->sent_rcv_time.tv_sec,
 586                                             chk->sent_rcv_time.tv_usec,
 587                                             SCTP_FR_T3_STOPPED);
 588                                 }
 589                                 continue;
 590                         } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
 591                             (window_probe == 0)) {
 592                                 /*
 593                                  * we must look at the micro seconds to
 594                                  * know.
 595                                  */
 596                                 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
 597                                         /*
 598                                          * ok it was sent after our boundary
 599                                          * time.
 600                                          */
 601                                         continue;
 602                                 }
 603                         }
 604                         if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) {
 605                                 /* Is it expired? */
 606                                 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
 607                                         /* Yes so drop it */
 608                                         if (chk->data) {
 609                                                 (void)sctp_release_pr_sctp_chunk(stcb,
 610                                                     chk,
 611                                                     1,
 612                                                     SCTP_SO_NOT_LOCKED);
 613                                                 cnt_abandoned++;
 614                                         }
 615                                         continue;
 616                                 }
 617                         }
 618                         if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) {
 619                                 /* Has it been retransmitted tv_sec times? */
 620                                 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) {
 621                                         if (chk->data) {
 622                                                 (void)sctp_release_pr_sctp_chunk(stcb,
 623                                                     chk,
 624                                                     1,
 625                                                     SCTP_SO_NOT_LOCKED);
 626                                                 cnt_abandoned++;
 627                                         }
 628                                         continue;
 629                                 }
 630                         }
 631                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
 632                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
 633                                 num_mk++;
 634                                 if (fir == 0) {
 635                                         fir = 1;
 636                                         tsnfirst = chk->rec.data.TSN_seq;
 637                                 }
 638                                 tsnlast = chk->rec.data.TSN_seq;
 639                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 640                                         sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count,
 641                                             0, SCTP_FR_T3_MARKED);
 642                                 }
 643                                 if (chk->rec.data.chunk_was_revoked) {
 644                                         /* deflate the cwnd */
 645                                         chk->whoTo->cwnd -= chk->book_size;
 646                                         chk->rec.data.chunk_was_revoked = 0;
 647                                 }
 648                                 net->marked_retrans++;
 649                                 stcb->asoc.marked_retrans++;
 650                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
 651                                         sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO,
 652                                             chk->whoTo->flight_size,
 653                                             chk->book_size,
 654                                             (uintptr_t) chk->whoTo,
 655                                             chk->rec.data.TSN_seq);
 656                                 }
 657                                 sctp_flight_size_decrease(chk);
 658                                 sctp_total_flight_decrease(stcb, chk);
 659                                 stcb->asoc.peers_rwnd += chk->send_size;
 660                                 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
 661                         }
 662                         chk->sent = SCTP_DATAGRAM_RESEND;
 663                         SCTP_STAT_INCR(sctps_markedretrans);
 664
 665                         /* reset the TSN for striking and other FR stuff */
 666                         chk->rec.data.doing_fast_retransmit = 0;
 667                         /* Clear any time so NO RTT is being done */
 668
 669                         if (chk->do_rtt) {
 670                                 if (chk->whoTo->rto_needed == 0) {
 671                                         chk->whoTo->rto_needed = 1;
 672                                 }
 673                         }
 674                         chk->do_rtt = 0;
 675                         if (alt != net) {
 676                                 sctp_free_remote_addr(chk->whoTo);
 677                                 chk->no_fr_allowed = 1;
 678                                 chk->whoTo = alt;
 679                                 atomic_add_int(&alt->ref_count, 1);
 680                         } else {
 681                                 chk->no_fr_allowed = 0;
 682                                 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
 683                                         chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
 684                                 } else {
 685                                         chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
 686                                 }
 687                         }
 688                         /*
 689                          * CMT: Do not allow FRs on retransmitted TSNs.
 690                          */
 691                         if (stcb->asoc.sctp_cmt_on_off > 0) {
 692                                 chk->no_fr_allowed = 1;
 693                         }
 694 #ifdef THIS_SHOULD_NOT_BE_DONE
 695                 } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
 696                         /* remember highest acked one */
 697                         could_be_sent = chk;
 698 #endif
 699                 }
 700                 if (chk->sent == SCTP_DATAGRAM_RESEND) {
 701                         cnt_mk++;
 702                 }
 703         }
 704         if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
 705                 /* we did not subtract the same things? */
 706                 audit_tf = 1;
 707         }
 708         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 709                 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
 710         }
 711 #ifdef SCTP_DEBUG
 712         if (num_mk) {
 713                 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
 714                     tsnlast);
 715                 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n",
 716                     num_mk, (u_long)stcb->asoc.peers_rwnd);
 717                 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
 718                     tsnlast);
 719                 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n",
 720                     num_mk,
 721                     (int)stcb->asoc.peers_rwnd);
 722         }
 723 #endif
 724         *num_marked = num_mk;
 725         *num_abandoned = cnt_abandoned;
 726         /*
 727          * Now check for a ECN Echo that may be stranded And include the
 728          * cnt_mk'd to have all resends in the control queue.
 729          */
 730         TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
 731                 if (chk->sent == SCTP_DATAGRAM_RESEND) {
 732                         cnt_mk++;
 733                 }
 734                 if ((chk->whoTo == net) &&
 735                     (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
 736                         sctp_free_remote_addr(chk->whoTo);
 737                         chk->whoTo = alt;
 738                         if (chk->sent != SCTP_DATAGRAM_RESEND) {
 739                                 chk->sent = SCTP_DATAGRAM_RESEND;
 740                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
 741                                 cnt_mk++;
 742                         }
 743                         atomic_add_int(&alt->ref_count, 1);
 744                 }
 745         }
 746 #ifdef THIS_SHOULD_NOT_BE_DONE
 747         if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) {
 748                 /* fix it so we retransmit the highest acked anyway */
 749                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
 750                 cnt_mk++;
 751                 could_be_sent->sent = SCTP_DATAGRAM_RESEND;
 752         }
 753 #endif
 754         if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
 755 #ifdef INVARIANTS
 756                 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n",
 757                     cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk);
 758 #endif
 759 #ifndef SCTP_AUDITING_ENABLED
 760                 stcb->asoc.sent_queue_retran_cnt = cnt_mk;
 761 #endif
 762         }
 763         if (audit_tf) {
 764                 SCTPDBG(SCTP_DEBUG_TIMER4,
 765                     "Audit total flight due to negative value net:%p\n",
 766                     (void *)net);
 767                 stcb->asoc.total_flight = 0;
 768                 stcb->asoc.total_flight_count = 0;
 769                 /* Clear all networks flight size */
 770                 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) {
 771                         lnets->flight_size = 0;
 772                         SCTPDBG(SCTP_DEBUG_TIMER4,
 773                             "Net:%p c-f cwnd:%d ssthresh:%d\n",
 774                             (void *)lnets, lnets->cwnd, lnets->ssthresh);
 775                 }
 776                 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
 777                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
 778                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
 779                                         sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
 780                                             chk->whoTo->flight_size,
 781                                             chk->book_size,
 782                                             (uintptr_t) chk->whoTo,
 783                                             chk->rec.data.TSN_seq);
 784                                 }
 785                                 sctp_flight_size_increase(chk);
 786                                 sctp_total_flight_increase(stcb, chk);
 787                         }
 788                 }
 789         }
 790         /* We return 1 if we only have a window probe outstanding */
 791         return (0);
 792 }
 793
 794
 795 int
 796 sctp_t3rxt_timer(struct sctp_inpcb *inp,
 797     struct sctp_tcb *stcb,
 798     struct sctp_nets *net)
 799 {
 800         struct sctp_nets *alt;
 801         int win_probe, num_mk, num_abandoned;
 802
 803         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 804                 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
 805         }
 806         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 807                 struct sctp_nets *lnet;
 808
 809                 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
 810                         if (net == lnet) {
 811                                 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
 812                         } else {
 813                                 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
 814                         }
 815                 }
 816         }
 817         /* Find an alternate and mark those for retransmission */
 818         if ((stcb->asoc.peers_rwnd == 0) &&
 819             (stcb->asoc.total_flight < net->mtu)) {
 820                 SCTP_STAT_INCR(sctps_timowindowprobe);
 821                 win_probe = 1;
 822         } else {
 823                 win_probe = 0;
 824         }
 825
 826         if (win_probe == 0) {
 827                 /* We don't do normal threshold management on window probes */
 828                 if (sctp_threshold_management(inp, stcb, net,
 829                     stcb->asoc.max_send_times)) {
 830                         /* Association was destroyed */
 831                         return (1);
 832                 } else {
 833                         if (net != stcb->asoc.primary_destination) {
 834                                 /* send a immediate HB if our RTO is stale */
 835                                 struct timeval now;
 836                                 unsigned int ms_goneby;
 837
 838                                 (void)SCTP_GETTIME_TIMEVAL(&now);
 839                                 if (net->last_sent_time.tv_sec) {
 840                                         ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000;
 841                                 } else {
 842                                         ms_goneby = 0;
 843                                 }
 844                                 if ((net->dest_state & SCTP_ADDR_PF) == 0) {
 845                                         if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
 846                                                 /*
 847                                                  * no recent feed back in an
 848                                                  * RTO or more, request a
 849                                                  * RTT update
 850                                                  */
 851                                                 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 852                                         }
 853                                 }
 854                         }
 855                 }
 856         } else {
 857                 /*
 858                  * For a window probe we don't penalize the net's but only
 859                  * the association. This may fail it if SACKs are not coming
 860                  * back. If sack's are coming with rwnd locked at 0, we will
 861                  * continue to hold things waiting for rwnd to raise
 862                  */
 863                 if (sctp_threshold_management(inp, stcb, NULL,
 864                     stcb->asoc.max_send_times)) {
 865                         /* Association was destroyed */
 866                         return (1);
 867                 }
 868         }
 869         if (stcb->asoc.sctp_cmt_on_off > 0) {
 870                 if (net->pf_threshold < net->failure_threshold) {
 871                         alt = sctp_find_alternate_net(stcb, net, 2);
 872                 } else {
 873                         /*
 874                          * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is
 875                          * being used, then pick dest with largest ssthresh
 876                          * for any retransmission.
 877                          */
 878                         alt = sctp_find_alternate_net(stcb, net, 1);
 879                         /*
 880                          * CUCv2: If a different dest is picked for the
 881                          * retransmission, then new (rtx-)pseudo_cumack
 882                          * needs to be tracked for orig dest. Let CUCv2
 883                          * track new (rtx-) pseudo-cumack always.
 884                          */
 885                         net->find_pseudo_cumack = 1;
 886                         net->find_rtx_pseudo_cumack = 1;
 887                 }
 888         } else {
 889                 alt = sctp_find_alternate_net(stcb, net, 0);
 890         }
 891
 892         num_mk = 0;
 893         num_abandoned = 0;
 894         (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe,
 895             &num_mk, &num_abandoned);
 896         /* FR Loss recovery just ended with the T3. */
 897         stcb->asoc.fast_retran_loss_recovery = 0;
 898
 899         /* CMT FR loss recovery ended with the T3 */
 900         net->fast_retran_loss_recovery = 0;
 901         if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
 902             (net->flight_size == 0)) {
 903                 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
 904         }
 905         /*
 906          * setup the sat loss recovery that prevents satellite cwnd advance.
 907          */
 908         stcb->asoc.sat_t3_loss_recovery = 1;
 909         stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
 910
 911         /* Backoff the timer and cwnd */
 912         sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned);
 913         if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
 914             (net->dest_state & SCTP_ADDR_PF)) {
 915                 /* Move all pending over too */
 916                 sctp_move_chunks_from_net(stcb, net);
 917
 918                 /*
 919                  * Get the address that failed, to force a new src address
 920                  * selecton and a route allocation.
 921                  */
 922                 if (net->ro._s_addr) {
 923                         sctp_free_ifa(net->ro._s_addr);
 924                         net->ro._s_addr = NULL;
 925                 }
 926                 net->src_addr_selected = 0;
 927
 928                 /* Force a route allocation too */
 929                 if (net->ro.ro_rt) {
 930                         RTFREE(net->ro.ro_rt);
 931                         net->ro.ro_rt = NULL;
 932                 }
 933                 /* Was it our primary? */
 934                 if ((stcb->asoc.primary_destination == net) && (alt != net)) {
 935                         /*
 936                          * Yes, note it as such and find an alternate note:
 937                          * this means HB code must use this to resent the
 938                          * primary if it goes active AND if someone does a
 939                          * change-primary then this flag must be cleared
 940                          * from any net structures.
 941                          */
 942                         if (stcb->asoc.alternate) {
 943                                 sctp_free_remote_addr(stcb->asoc.alternate);
 944                         }
 945                         stcb->asoc.alternate = alt;
 946                         atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
 947                 }
 948         }
 949         /*
 950          * Special case for cookie-echo'ed case, we don't do output but must
 951          * await the COOKIE-ACK before retransmission
 952          */
 953         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
 954                 /*
 955                  * Here we just reset the timer and start again since we
 956                  * have not established the asoc
 957                  */
 958                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
 959                 return (0);
 960         }
 961         if (stcb->asoc.prsctp_supported) {
 962                 struct sctp_tmit_chunk *lchk;
 963
 964                 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc);
 965                 /* C3. See if we need to send a Fwd-TSN */
 966                 if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) {
 967                         send_forward_tsn(stcb, &stcb->asoc);
 968                         if (lchk) {
 969                                 /* Assure a timer is up */
 970                                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
 971                         }
 972                 }
 973         }
 974         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) {
 975                 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
 976         }
 977         return (0);
 978 }
 979
 980 int
 981 sctp_t1init_timer(struct sctp_inpcb *inp,
 982     struct sctp_tcb *stcb,
 983     struct sctp_nets *net)
 984 {
 985         /* bump the thresholds */
 986         if (stcb->asoc.delayed_connection) {
 987                 /*
 988                  * special hook for delayed connection. The library did NOT
 989                  * complete the rest of its sends.
 990                  */
 991                 stcb->asoc.delayed_connection = 0;
 992                 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
 993                 return (0);
 994         }
 995         if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) {
 996                 return (0);
 997         }
 998         if (sctp_threshold_management(inp, stcb, net,
 999             stcb->asoc.max_init_times)) {
1000                 /* Association was destroyed */
1001                 return (1);
1002         }
1003         stcb->asoc.dropped_special_cnt = 0;
1004         sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0);
1005         if (stcb->asoc.initial_init_rto_max < net->RTO) {
1006                 net->RTO = stcb->asoc.initial_init_rto_max;
1007         }
1008         if (stcb->asoc.numnets > 1) {
1009                 /* If we have more than one addr use it */
1010                 struct sctp_nets *alt;
1011
1012                 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0);
1013                 if (alt != stcb->asoc.primary_destination) {
1014                         sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination);
1015                         stcb->asoc.primary_destination = alt;
1016                 }
1017         }
1018         /* Send out a new init */
1019         sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1020         return (0);
1021 }
1022
1023 /*
1024  * For cookie and asconf we actually need to find and mark for resend, then
1025  * increment the resend counter (after all the threshold management stuff of
1026  * course).
1027  */
1028 int
1029 sctp_cookie_timer(struct sctp_inpcb *inp,
1030     struct sctp_tcb *stcb,
1031     struct sctp_nets *net SCTP_UNUSED)
1032 {
1033         struct sctp_nets *alt;
1034         struct sctp_tmit_chunk *cookie;
1035
1036         /* first before all else we must find the cookie */
1037         TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) {
1038                 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
1039                         break;
1040                 }
1041         }
1042         if (cookie == NULL) {
1043                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
1044                         /* FOOBAR! */
1045                         struct mbuf *op_err;
1046
1047                         op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION,
1048                             "Cookie timer expired, but no cookie");
1049                         inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_4;
1050                         sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED);
1051                 } else {
1052 #ifdef INVARIANTS
1053                         panic("Cookie timer expires in wrong state?");
1054 #else
1055                         SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc));
1056                         return (0);
1057 #endif
1058                 }
1059                 return (0);
1060         }
1061         /* Ok we found the cookie, threshold management next */
1062         if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1063             stcb->asoc.max_init_times)) {
1064                 /* Assoc is over */
1065                 return (1);
1066         }
1067         /*
1068          * cleared theshold management now lets backoff the address & select
1069          * an alternate
1070          */
1071         stcb->asoc.dropped_special_cnt = 0;
1072         sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0);
1073         alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0);
1074         if (alt != cookie->whoTo) {
1075                 sctp_free_remote_addr(cookie->whoTo);
1076                 cookie->whoTo = alt;
1077                 atomic_add_int(&alt->ref_count, 1);
1078         }
1079         /* Now mark the retran info */
1080         if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1081                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1082         }
1083         cookie->sent = SCTP_DATAGRAM_RESEND;
1084         /*
1085          * Now call the output routine to kick out the cookie again, Note we
1086          * don't mark any chunks for retran so that FR will need to kick in
1087          * to move these (or a send timer).
1088          */
1089         return (0);
1090 }
1091
1092 int
1093 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1094     struct sctp_nets *net)
1095 {
1096         struct sctp_nets *alt;
1097         struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1098
1099         if (stcb->asoc.stream_reset_outstanding == 0) {
1100                 return (0);
1101         }
1102         /* find the existing STRRESET, we use the seq number we sent out on */
1103         (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
1104         if (strrst == NULL) {
1105                 return (0);
1106         }
1107         /* do threshold management */
1108         if (sctp_threshold_management(inp, stcb, strrst->whoTo,
1109             stcb->asoc.max_send_times)) {
1110                 /* Assoc is over */
1111                 return (1);
1112         }
1113         /*
1114          * cleared theshold management now lets backoff the address & select
1115          * an alternate
1116          */
1117         sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0);
1118         alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0);
1119         sctp_free_remote_addr(strrst->whoTo);
1120         strrst->whoTo = alt;
1121         atomic_add_int(&alt->ref_count, 1);
1122
1123         /* See if a ECN Echo is also stranded */
1124         TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1125                 if ((chk->whoTo == net) &&
1126                     (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1127                         sctp_free_remote_addr(chk->whoTo);
1128                         if (chk->sent != SCTP_DATAGRAM_RESEND) {
1129                                 chk->sent = SCTP_DATAGRAM_RESEND;
1130                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1131                         }
1132                         chk->whoTo = alt;
1133                         atomic_add_int(&alt->ref_count, 1);
1134                 }
1135         }
1136         if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1137                 /*
1138                  * If the address went un-reachable, we need to move to
1139                  * alternates for ALL chk's in queue
1140                  */
1141                 sctp_move_chunks_from_net(stcb, net);
1142         }
1143         /* mark the retran info */
1144         if (strrst->sent != SCTP_DATAGRAM_RESEND)
1145                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1146         strrst->sent = SCTP_DATAGRAM_RESEND;
1147
1148         /* restart the timer */
1149         sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo);
1150         return (0);
1151 }
1152
1153 int
1154 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1155     struct sctp_nets *net)
1156 {
1157         struct sctp_nets *alt;
1158         struct sctp_tmit_chunk *asconf, *chk;
1159
1160         /* is this a first send, or a retransmission? */
1161         if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) {
1162                 /* compose a new ASCONF chunk and send it */
1163                 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1164         } else {
1165                 /*
1166                  * Retransmission of the existing ASCONF is needed
1167                  */
1168
1169                 /* find the existing ASCONF */
1170                 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1171                 if (asconf == NULL) {
1172                         return (0);
1173                 }
1174                 /* do threshold management */
1175                 if (sctp_threshold_management(inp, stcb, asconf->whoTo,
1176                     stcb->asoc.max_send_times)) {
1177                         /* Assoc is over */
1178                         return (1);
1179                 }
1180                 if (asconf->snd_count > stcb->asoc.max_send_times) {
1181                         /*
1182                          * Something is rotten: our peer is not responding
1183                          * to ASCONFs but apparently is to other chunks.
1184                          * i.e. it is not properly handling the chunk type
1185                          * upper bits. Mark this peer as ASCONF incapable
1186                          * and cleanup.
1187                          */
1188                         SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1189                         sctp_asconf_cleanup(stcb, net);
1190                         return (0);
1191                 }
1192                 /*
1193                  * cleared threshold management, so now backoff the net and
1194                  * select an alternate
1195                  */
1196                 sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0);
1197                 alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0);
1198                 if (asconf->whoTo != alt) {
1199                         sctp_free_remote_addr(asconf->whoTo);
1200                         asconf->whoTo = alt;
1201                         atomic_add_int(&alt->ref_count, 1);
1202                 }
1203                 /* See if an ECN Echo is also stranded */
1204                 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1205                         if ((chk->whoTo == net) &&
1206                             (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1207                                 sctp_free_remote_addr(chk->whoTo);
1208                                 chk->whoTo = alt;
1209                                 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1210                                         chk->sent = SCTP_DATAGRAM_RESEND;
1211                                         sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1212                                 }
1213                                 atomic_add_int(&alt->ref_count, 1);
1214                         }
1215                 }
1216                 TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1217                         if (chk->whoTo != alt) {
1218                                 sctp_free_remote_addr(chk->whoTo);
1219                                 chk->whoTo = alt;
1220                                 atomic_add_int(&alt->ref_count, 1);
1221                         }
1222                         if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT)
1223                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1224                         chk->sent = SCTP_DATAGRAM_RESEND;
1225                 }
1226                 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1227                         /*
1228                          * If the address went un-reachable, we need to move
1229                          * to the alternate for ALL chunks in queue
1230                          */
1231                         sctp_move_chunks_from_net(stcb, net);
1232                 }
1233                 /* mark the retran info */
1234                 if (asconf->sent != SCTP_DATAGRAM_RESEND)
1235                         sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1236                 asconf->sent = SCTP_DATAGRAM_RESEND;
1237
1238                 /* send another ASCONF if any and we can do */
1239                 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1240         }
1241         return (0);
1242 }
1243
1244 /* Mobility adaptation */
1245 void
1246 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1247     struct sctp_nets *net SCTP_UNUSED)
1248 {
1249         if (stcb->asoc.deleted_primary == NULL) {
1250                 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n");
1251                 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1252                 return;
1253         }
1254         SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary ");
1255         SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1256         sctp_free_remote_addr(stcb->asoc.deleted_primary);
1257         stcb->asoc.deleted_primary = NULL;
1258         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1259         return;
1260 }
1261
1262 /*
1263  * For the shutdown and shutdown-ack, we do not keep one around on the
1264  * control queue. This means we must generate a new one and call the general
1265  * chunk output routine, AFTER having done threshold management.
1266  * It is assumed that net is non-NULL.
1267  */
1268 int
1269 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1270     struct sctp_nets *net)
1271 {
1272         struct sctp_nets *alt;
1273
1274         /* first threshold managment */
1275         if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1276                 /* Assoc is over */
1277                 return (1);
1278         }
1279         sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1280         /* second select an alternative */
1281         alt = sctp_find_alternate_net(stcb, net, 0);
1282
1283         /* third generate a shutdown into the queue for out net */
1284         sctp_send_shutdown(stcb, alt);
1285
1286         /* fourth restart timer */
1287         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1288         return (0);
1289 }
1290
1291 int
1292 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1293     struct sctp_nets *net)
1294 {
1295         struct sctp_nets *alt;
1296
1297         /* first threshold managment */
1298         if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1299                 /* Assoc is over */
1300                 return (1);
1301         }
1302         sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1303         /* second select an alternative */
1304         alt = sctp_find_alternate_net(stcb, net, 0);
1305
1306         /* third generate a shutdown into the queue for out net */
1307         sctp_send_shutdown_ack(stcb, alt);
1308
1309         /* fourth restart timer */
1310         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1311         return (0);
1312 }
1313
1314 static void
1315 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp,
1316     struct sctp_tcb *stcb)
1317 {
1318         struct sctp_stream_queue_pending *sp;
1319         unsigned int i, chks_in_queue = 0;
1320         int being_filled = 0;
1321
1322         /*
1323          * This function is ONLY called when the send/sent queues are empty.
1324          */
1325         if ((stcb == NULL) || (inp == NULL))
1326                 return;
1327
1328         if (stcb->asoc.sent_queue_retran_cnt) {
1329                 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n",
1330                     stcb->asoc.sent_queue_retran_cnt);
1331                 stcb->asoc.sent_queue_retran_cnt = 0;
1332         }
1333         if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1334                 /* No stream scheduler information, initialize scheduler */
1335                 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0);
1336                 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1337                         /* yep, we lost a stream or two */
1338                         SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n");
1339                 } else {
1340                         /* no streams lost */
1341                         stcb->asoc.total_output_queue_size = 0;
1342                 }
1343         }
1344         /* Check to see if some data queued, if so report it */
1345         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1346                 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
1347                         TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
1348                                 if (sp->msg_is_complete)
1349                                         being_filled++;
1350                                 chks_in_queue++;
1351                         }
1352                 }
1353         }
1354         if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
1355                 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n",
1356                     stcb->asoc.stream_queue_cnt, chks_in_queue);
1357         }
1358         if (chks_in_queue) {
1359                 /* call the output queue function */
1360                 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1361                 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1362                     (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1363                         /*
1364                          * Probably should go in and make it go back through
1365                          * and add fragments allowed
1366                          */
1367                         if (being_filled == 0) {
1368                                 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1369                                     chks_in_queue);
1370                         }
1371                 }
1372         } else {
1373                 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n",
1374                     (u_long)stcb->asoc.total_output_queue_size);
1375                 stcb->asoc.total_output_queue_size = 0;
1376         }
1377 }
1378
1379 int
1380 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1381     struct sctp_nets *net)
1382 {
1383         uint8_t net_was_pf;
1384
1385         if (net->dest_state & SCTP_ADDR_PF) {
1386                 net_was_pf = 1;
1387         } else {
1388                 net_was_pf = 0;
1389         }
1390         if (net->hb_responded == 0) {
1391                 if (net->ro._s_addr) {
1392                         /*
1393                          * Invalidate the src address if we did not get a
1394                          * response last time.
1395                          */
1396                         sctp_free_ifa(net->ro._s_addr);
1397                         net->ro._s_addr = NULL;
1398                         net->src_addr_selected = 0;
1399                 }
1400                 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1401                 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1402                         /* Assoc is over */
1403                         return (1);
1404                 }
1405         }
1406         /* Zero PBA, if it needs it */
1407         if (net->partial_bytes_acked) {
1408                 net->partial_bytes_acked = 0;
1409         }
1410         if ((stcb->asoc.total_output_queue_size > 0) &&
1411             (TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1412             (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1413                 sctp_audit_stream_queues_for_size(inp, stcb);
1414         }
1415         if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1416             !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1417                 /*
1418                  * when move to PF during threshold mangement, a HB has been
1419                  * queued in that routine
1420                  */
1421                 uint32_t ms_gone_by;
1422
1423                 if ((net->last_sent_time.tv_sec > 0) ||
1424                     (net->last_sent_time.tv_usec > 0)) {
1425                         struct timeval diff;
1426
1427                         SCTP_GETTIME_TIMEVAL(&diff);
1428                         timevalsub(&diff, &net->last_sent_time);
1429                         ms_gone_by = (uint32_t) (diff.tv_sec * 1000) +
1430                             (uint32_t) (diff.tv_usec / 1000);
1431                 } else {
1432                         ms_gone_by = 0xffffffff;
1433                 }
1434                 if ((ms_gone_by >= net->heart_beat_delay) ||
1435                     (net->dest_state & SCTP_ADDR_PF)) {
1436                         sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1437                 }
1438         }
1439         return (0);
1440 }
1441
1442 void
1443 sctp_pathmtu_timer(struct sctp_inpcb *inp,
1444     struct sctp_tcb *stcb,
1445     struct sctp_nets *net)
1446 {
1447         uint32_t next_mtu, mtu;
1448
1449         next_mtu = sctp_get_next_mtu(net->mtu);
1450
1451         if ((next_mtu > net->mtu) && (net->port == 0)) {
1452                 if ((net->src_addr_selected == 0) ||
1453                     (net->ro._s_addr == NULL) ||
1454                     (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1455                         if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1456                                 sctp_free_ifa(net->ro._s_addr);
1457                                 net->ro._s_addr = NULL;
1458                                 net->src_addr_selected = 0;
1459                         } else if (net->ro._s_addr == NULL) {
1460 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1461                                 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1462                                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1463
1464                                         /* KAME hack: embed scopeid */
1465                                         (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1466                                 }
1467 #endif
1468
1469                                 net->ro._s_addr = sctp_source_address_selection(inp,
1470                                     stcb,
1471                                     (sctp_route_t *) & net->ro,
1472                                     net, 0, stcb->asoc.vrf_id);
1473 #if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1474                                 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1475                                         struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1476
1477                                         (void)sa6_recoverscope(sin6);
1478                                 }
1479 #endif                          /* INET6 */
1480                         }
1481                         if (net->ro._s_addr)
1482                                 net->src_addr_selected = 1;
1483                 }
1484                 if (net->ro._s_addr) {
1485                         mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt);
1486 #if defined(INET) || defined(INET6)
1487                         if (net->port) {
1488                                 mtu -= sizeof(struct udphdr);
1489                         }
1490 #endif
1491                         if (mtu > next_mtu) {
1492                                 net->mtu = next_mtu;
1493                         }
1494                 }
1495         }
1496         /* restart the timer */
1497         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1498 }
1499
1500 void
1501 sctp_autoclose_timer(struct sctp_inpcb *inp,
1502     struct sctp_tcb *stcb,
1503     struct sctp_nets *net)
1504 {
1505         struct timeval tn, *tim_touse;
1506         struct sctp_association *asoc;
1507         int ticks_gone_by;
1508
1509         (void)SCTP_GETTIME_TIMEVAL(&tn);
1510         if (stcb->asoc.sctp_autoclose_ticks &&
1511             sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1512                 /* Auto close is on */
1513                 asoc = &stcb->asoc;
1514                 /* pick the time to use */
1515                 if (asoc->time_last_rcvd.tv_sec >
1516                     asoc->time_last_sent.tv_sec) {
1517                         tim_touse = &asoc->time_last_rcvd;
1518                 } else {
1519                         tim_touse = &asoc->time_last_sent;
1520                 }
1521                 /* Now has long enough transpired to autoclose? */
1522                 ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec);
1523                 if ((ticks_gone_by > 0) &&
1524                     (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) {
1525                         /*
1526                          * autoclose time has hit, call the output routine,
1527                          * which should do nothing just to be SURE we don't
1528                          * have hanging data. We can then safely check the
1529                          * queues and know that we are clear to send
1530                          * shutdown
1531                          */
1532                         sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1533                         /* Are we clean? */
1534                         if (TAILQ_EMPTY(&asoc->send_queue) &&
1535                             TAILQ_EMPTY(&asoc->sent_queue)) {
1536                                 /*
1537                                  * there is nothing queued to send, so I'm
1538                                  * done...
1539                                  */
1540                                 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1541                                         /* only send SHUTDOWN 1st time thru */
1542                                         struct sctp_nets *netp;
1543
1544                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
1545                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1546                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1547                                         }
1548                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
1549                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
1550                                         sctp_stop_timers_for_shutdown(stcb);
1551                                         if (stcb->asoc.alternate) {
1552                                                 netp = stcb->asoc.alternate;
1553                                         } else {
1554                                                 netp = stcb->asoc.primary_destination;
1555                                         }
1556                                         sctp_send_shutdown(stcb, netp);
1557                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1558                                             stcb->sctp_ep, stcb,
1559                                             netp);
1560                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1561                                             stcb->sctp_ep, stcb,
1562                                             netp);
1563                                 }
1564                         }
1565                 } else {
1566                         /*
1567                          * No auto close at this time, reset t-o to check
1568                          * later
1569                          */
1570                         int tmp;
1571
1572                         /* fool the timer startup to use the time left */
1573                         tmp = asoc->sctp_autoclose_ticks;
1574                         asoc->sctp_autoclose_ticks -= ticks_gone_by;
1575                         sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1576                             net);
1577                         /* restore the real tick value */
1578                         asoc->sctp_autoclose_ticks = tmp;
1579                 }
1580         }
1581 }