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 #include <netinet/udp.h>
  53
  54
  55 void
  56 sctp_audit_retranmission_queue(struct sctp_association *asoc)
  57 {
  58         struct sctp_tmit_chunk *chk;
  59
  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);
  68                 }
  69                 asoc->sent_queue_cnt++;
  70         }
  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);
  74                 }
  75         }
  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);
  79                 }
  80         }
  81         SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n",
  82             asoc->sent_queue_retran_cnt,
  83             asoc->sent_queue_cnt);
  84 }
  85
  86 int
  87 sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
  88     struct sctp_nets *net, uint16_t threshold)
  89 {
  90         if (net) {
  91                 net->error_count++;
  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,
 102                                     stcb, 0,
 103                                     (void *)net, SCTP_SO_NOT_LOCKED);
 104                         }
 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);
 113                         }
 114                 }
 115         }
 116         if (stcb == NULL)
 117                 return (0);
 118
 119         if (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,
 126                                     __LINE__);
 127                         }
 128                         stcb->asoc.overall_error_count++;
 129                 }
 130         } else {
 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,
 136                             __LINE__);
 137                 }
 138                 stcb->asoc.overall_error_count++;
 139         }
 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));
 144         /*
 145          * We specifically do not do >= to give the assoc one more change
 146          * before we fail it.
 147          */
 148         if (stcb->asoc.overall_error_count > threshold) {
 149                 /* Abort notification sends a ULP notify */
 150                 struct mbuf *op_err;
 151
 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);
 156                 return (1);
 157         }
 158         return (0);
 159 }
 160
 161 /*
 162  * sctp_find_alternate_net() returns a non-NULL pointer as long
 163  * the argument net is non-NULL.
 164  */
 165 struct sctp_nets *
 166 sctp_find_alternate_net(struct sctp_tcb *stcb,
 167     struct sctp_nets *net,
 168     int mode)
 169 {
 170         /* Find and return an alternate network if possible */
 171         struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL;
 172         int once;
 173
 174         /* JRS 5/14/07 - Initialize min_errors to an impossible value. */
 175         int min_errors = -1;
 176         uint32_t max_cwnd = 0;
 177
 178         if (stcb->asoc.numnets == 1) {
 179                 /* No others but net */
 180                 return (TAILQ_FIRST(&stcb->asoc.nets));
 181         }
 182         /*
 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.
 189          */
 190         if (mode == 2) {
 191                 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
 192                         /*
 193                          * JRS 5/14/07 - If the destination is unreachable
 194                          * or unconfirmed, skip it.
 195                          */
 196                         if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
 197                             (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
 198                                 continue;
 199                         }
 200                         /*
 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.
 207                          */
 208                         if (mnet->dest_state & SCTP_ADDR_PF) {
 209                                 /*
 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
 215                                  * handler.
 216                                  */
 217                                 if (mnet == net) {
 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;
 228                                         }
 229                                         continue;
 230                                 } else {
 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;
 241                                         }
 242                                         continue;
 243                                 }
 244                         }
 245                         /*
 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.
 252                          */
 253                         if (max_cwnd < mnet->cwnd) {
 254                                 max_cwnd_net = mnet;
 255                                 max_cwnd = mnet->cwnd;
 256                         } else if (max_cwnd == mnet->cwnd) {
 257                                 uint32_t rndval;
 258                                 uint8_t this_random;
 259
 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;
 266                                 } else {
 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;
 270                                 }
 271                                 if (this_random % 2 == 1) {
 272                                         max_cwnd_net = mnet;
 273                                         max_cwnd = mnet->cwnd;  /* Useless? */
 274                                 }
 275                         }
 276                 }
 277                 if (max_cwnd_net == NULL) {
 278                         if (min_errors_net == NULL) {
 279                                 return (net);
 280                         }
 281                         return (min_errors_net);
 282                 } else {
 283                         return (max_cwnd_net);
 284                 }
 285         }
 286         /*
 287          * JRS 5/14/07 - If mode is set to 1, use the CMT policy for
 288          * choosing an alternate net.
 289          */
 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)) {
 294                                 /*
 295                                  * will skip ones that are not-reachable or
 296                                  * unconfirmed
 297                                  */
 298                                 continue;
 299                         }
 300                         if (max_cwnd < mnet->cwnd) {
 301                                 max_cwnd_net = mnet;
 302                                 max_cwnd = mnet->cwnd;
 303                         } else if (max_cwnd == mnet->cwnd) {
 304                                 uint32_t rndval;
 305                                 uint8_t this_random;
 306
 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;
 314                                 } else {
 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;
 318                                 }
 319                                 if (this_random % 2) {
 320                                         max_cwnd_net = mnet;
 321                                         max_cwnd = mnet->cwnd;
 322                                 }
 323                         }
 324                 }
 325                 if (max_cwnd_net) {
 326                         return (max_cwnd_net);
 327                 }
 328         }
 329         mnet = net;
 330         once = 0;
 331
 332         if (mnet == NULL) {
 333                 mnet = TAILQ_FIRST(&stcb->asoc.nets);
 334                 if (mnet == NULL) {
 335                         return (NULL);
 336                 }
 337         }
 338         do {
 339                 alt = TAILQ_NEXT(mnet, sctp_next);
 340                 if (alt == NULL) {
 341                         once++;
 342                         if (once > 1) {
 343                                 break;
 344                         }
 345                         alt = TAILQ_FIRST(&stcb->asoc.nets);
 346                         if (alt == NULL) {
 347                                 return (NULL);
 348                         }
 349                 }
 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;
 354                         }
 355                         alt->src_addr_selected = 0;
 356                 }
 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 */
 362                         break;
 363                 }
 364                 mnet = alt;
 365         } while (alt != NULL);
 366
 367         if (alt == NULL) {
 368                 /* Case where NO insv network exists (dormant state) */
 369                 /* we rotate destinations */
 370                 once = 0;
 371                 mnet = net;
 372                 do {
 373                         if (mnet == NULL) {
 374                                 return (TAILQ_FIRST(&stcb->asoc.nets));
 375                         }
 376                         alt = TAILQ_NEXT(mnet, sctp_next);
 377                         if (alt == NULL) {
 378                                 once++;
 379                                 if (once > 1) {
 380                                         break;
 381                                 }
 382                                 alt = TAILQ_FIRST(&stcb->asoc.nets);
 383                         }
 384                         /* sa_ignore NO_NULL_CHK */
 385                         if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
 386                             (alt != net)) {
 387                                 /* Found an alternate address */
 388                                 break;
 389                         }
 390                         mnet = alt;
 391                 } while (alt != NULL);
 392         }
 393         if (alt == NULL) {
 394                 return (net);
 395         }
 396         return (alt);
 397 }
 398
 399 static void
 400 sctp_backoff_on_timeout(struct sctp_tcb *stcb,
 401     struct sctp_nets *net,
 402     int win_probe,
 403     int num_marked, int num_abandoned)
 404 {
 405         if (net->RTO == 0) {
 406                 net->RTO = stcb->asoc.minrto;
 407         }
 408         net->RTO <<= 1;
 409         if (net->RTO > stcb->asoc.maxrto) {
 410                 net->RTO = stcb->asoc.maxrto;
 411         }
 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);
 416         }
 417 }
 418
 419 #ifndef INVARIANTS
 420 static void
 421 sctp_recover_sent_list(struct sctp_tcb *stcb)
 422 {
 423         struct sctp_tmit_chunk *chk, *nchk;
 424         struct sctp_association *asoc;
 425
 426         asoc = &stcb->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--;
 434                                 }
 435                         }
 436                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
 437                         if (PR_SCTP_ENABLED(chk->flags)) {
 438                                 if (asoc->pr_sctp_cnt != 0)
 439                                         asoc->pr_sctp_cnt--;
 440                         }
 441                         if (chk->data) {
 442                                 /* sa_ignore NO_NULL_CHK */
 443                                 sctp_free_bufspace(stcb, asoc, chk, 1);
 444                                 sctp_m_freem(chk->data);
 445                                 chk->data = NULL;
 446                                 if (asoc->peer_supports_prsctp && PR_SCTP_BUF_ENABLED(chk->flags)) {
 447                                         asoc->sent_queue_cnt_removeable--;
 448                                 }
 449                         }
 450                         asoc->sent_queue_cnt--;
 451                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 452                 }
 453         }
 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);
 457         }
 458 }
 459
 460 #endif
 461
 462 static int
 463 sctp_mark_all_for_resend(struct sctp_tcb *stcb,
 464     struct sctp_nets *net,
 465     struct sctp_nets *alt,
 466     int window_probe,
 467     int *num_marked,
 468     int *num_abandoned)
 469 {
 470
 471         /*
 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.
 476          */
 477         struct sctp_tmit_chunk *chk, *nchk;
 478         struct sctp_nets *lnets;
 479         struct timeval now, min_wait, tv;
 480         int cur_rto;
 481         int cnt_abandoned;
 482         int audit_tf, num_mk, fir;
 483         unsigned int cnt_mk;
 484         uint32_t orig_flight, orig_tf;
 485         uint32_t tsnlast, tsnfirst;
 486         int recovery_cnt = 0;
 487
 488
 489         /* none in flight now */
 490         audit_tf = 0;
 491         fir = 0;
 492         /*
 493          * figure out how long a data chunk must be pending before we can
 494          * mark it ..
 495          */
 496         (void)SCTP_GETTIME_TIMEVAL(&now);
 497         /* get cur rto in micro-seconds */
 498         cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
 499         cur_rto *= 1000;
 500         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 501                 sctp_log_fr(cur_rto,
 502                     stcb->asoc.peers_rwnd,
 503                     window_probe,
 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);
 507         }
 508         tv.tv_sec = cur_rto / 1000000;
 509         tv.tv_usec = cur_rto % 1000000;
 510         min_wait = now;
 511         timevalsub(&min_wait, &tv);
 512         if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
 513                 /*
 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.
 518                  */
 519                 min_wait.tv_sec = min_wait.tv_usec = 0;
 520         }
 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);
 524         }
 525         /*
 526          * Our rwnd will be incorrect here since we are not adding back the
 527          * cnt * mbuf but we will fix that down below.
 528          */
 529         orig_flight = net->flight_size;
 530         orig_tf = stcb->asoc.total_flight;
 531
 532         net->fast_retran_ip = 0;
 533         /* Now on to each chunk */
 534         cnt_abandoned = 0;
 535         num_mk = cnt_mk = 0;
 536         tsnfirst = tsnlast = 0;
 537 #ifndef INVARIANTS
 538 start_again:
 539 #endif
 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);
 545                         recovery_cnt++;
 546 #ifdef INVARIANTS
 547                         panic("last acked >= chk on sent-Q");
 548 #else
 549                         SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
 550                         sctp_recover_sent_list(stcb);
 551                         if (recovery_cnt < 10) {
 552                                 goto start_again;
 553                         } else {
 554                                 SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
 555                         }
 556 #endif
 557                 }
 558                 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
 559                         /*
 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
 564                          * retransmission.
 565                          */
 566
 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);
 573                         }
 574                         if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
 575                                 /*
 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.
 579                                  */
 580                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 581                                         sctp_log_fr(0,
 582                                             chk->sent_rcv_time.tv_sec,
 583                                             chk->sent_rcv_time.tv_usec,
 584                                             SCTP_FR_T3_STOPPED);
 585                                 }
 586                                 continue;
 587                         } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
 588                             (window_probe == 0)) {
 589                                 /*
 590                                  * we must look at the micro seconds to
 591                                  * know.
 592                                  */
 593                                 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
 594                                         /*
 595                                          * ok it was sent after our boundary
 596                                          * time.
 597                                          */
 598                                         continue;
 599                                 }
 600                         }
 601                         if (stcb->asoc.peer_supports_prsctp && PR_SCTP_TTL_ENABLED(chk->flags)) {
 602                                 /* Is it expired? */
 603                                 if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
 604                                         /* Yes so drop it */
 605                                         if (chk->data) {
 606                                                 (void)sctp_release_pr_sctp_chunk(stcb,
 607                                                     chk,
 608                                                     1,
 609                                                     SCTP_SO_NOT_LOCKED);
 610                                                 cnt_abandoned++;
 611                                         }
 612                                         continue;
 613                                 }
 614                         }
 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) {
 618                                         if (chk->data) {
 619                                                 (void)sctp_release_pr_sctp_chunk(stcb,
 620                                                     chk,
 621                                                     1,
 622                                                     SCTP_SO_NOT_LOCKED);
 623                                                 cnt_abandoned++;
 624                                         }
 625                                         continue;
 626                                 }
 627                         }
 628                         if (chk->sent < SCTP_DATAGRAM_RESEND) {
 629                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
 630                                 num_mk++;
 631                                 if (fir == 0) {
 632                                         fir = 1;
 633                                         tsnfirst = chk->rec.data.TSN_seq;
 634                                 }
 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);
 639                                 }
 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;
 644                                 }
 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,
 650                                             chk->book_size,
 651                                             (uintptr_t) chk->whoTo,
 652                                             chk->rec.data.TSN_seq);
 653                                 }
 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);
 658                         }
 659                         chk->sent = SCTP_DATAGRAM_RESEND;
 660                         SCTP_STAT_INCR(sctps_markedretrans);
 661
 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 */
 665
 666                         if (chk->do_rtt) {
 667                                 if (chk->whoTo->rto_needed == 0) {
 668                                         chk->whoTo->rto_needed = 1;
 669                                 }
 670                         }
 671                         chk->do_rtt = 0;
 672                         if (alt != net) {
 673                                 sctp_free_remote_addr(chk->whoTo);
 674                                 chk->no_fr_allowed = 1;
 675                                 chk->whoTo = alt;
 676                                 atomic_add_int(&alt->ref_count, 1);
 677                         } else {
 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;
 681                                 } else {
 682                                         chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
 683                                 }
 684                         }
 685                         /*
 686                          * CMT: Do not allow FRs on retransmitted TSNs.
 687                          */
 688                         if (stcb->asoc.sctp_cmt_on_off > 0) {
 689                                 chk->no_fr_allowed = 1;
 690                         }
 691 #ifdef THIS_SHOULD_NOT_BE_DONE
 692                 } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
 693                         /* remember highest acked one */
 694                         could_be_sent = chk;
 695 #endif
 696                 }
 697                 if (chk->sent == SCTP_DATAGRAM_RESEND) {
 698                         cnt_mk++;
 699                 }
 700         }
 701         if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
 702                 /* we did not subtract the same things? */
 703                 audit_tf = 1;
 704         }
 705         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 706                 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
 707         }
 708 #ifdef SCTP_DEBUG
 709         if (num_mk) {
 710                 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
 711                     tsnlast);
 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",
 715                     tsnlast);
 716                 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n",
 717                     num_mk,
 718                     (int)stcb->asoc.peers_rwnd);
 719         }
 720 #endif
 721         *num_marked = num_mk;
 722         *num_abandoned = cnt_abandoned;
 723         /*
 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.
 726          */
 727         TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
 728                 if (chk->sent == SCTP_DATAGRAM_RESEND) {
 729                         cnt_mk++;
 730                 }
 731                 if ((chk->whoTo == net) &&
 732                     (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
 733                         sctp_free_remote_addr(chk->whoTo);
 734                         chk->whoTo = alt;
 735                         if (chk->sent != SCTP_DATAGRAM_RESEND) {
 736                                 chk->sent = SCTP_DATAGRAM_RESEND;
 737                                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
 738                                 cnt_mk++;
 739                         }
 740                         atomic_add_int(&alt->ref_count, 1);
 741                 }
 742         }
 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);
 747                 cnt_mk++;
 748                 could_be_sent->sent = SCTP_DATAGRAM_RESEND;
 749         }
 750 #endif
 751         if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
 752 #ifdef INVARIANTS
 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);
 755 #endif
 756 #ifndef SCTP_AUDITING_ENABLED
 757                 stcb->asoc.sent_queue_retran_cnt = cnt_mk;
 758 #endif
 759         }
 760         if (audit_tf) {
 761                 SCTPDBG(SCTP_DEBUG_TIMER4,
 762                     "Audit total flight due to negative value net:%p\n",
 763                     (void *)net);
 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);
 772                 }
 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,
 778                                             chk->book_size,
 779                                             (uintptr_t) chk->whoTo,
 780                                             chk->rec.data.TSN_seq);
 781                                 }
 782                                 sctp_flight_size_increase(chk);
 783                                 sctp_total_flight_increase(stcb, chk);
 784                         }
 785                 }
 786         }
 787         /* We return 1 if we only have a window probe outstanding */
 788         return (0);
 789 }
 790
 791
 792 int
 793 sctp_t3rxt_timer(struct sctp_inpcb *inp,
 794     struct sctp_tcb *stcb,
 795     struct sctp_nets *net)
 796 {
 797         struct sctp_nets *alt;
 798         int win_probe, num_mk, num_abandoned;
 799
 800         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
 801                 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
 802         }
 803         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
 804                 struct sctp_nets *lnet;
 805
 806                 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
 807                         if (net == lnet) {
 808                                 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
 809                         } else {
 810                                 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
 811                         }
 812                 }
 813         }
 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);
 818                 win_probe = 1;
 819         } else {
 820                 win_probe = 0;
 821         }
 822
 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 */
 828                         return (1);
 829                 } else {
 830                         if (net != stcb->asoc.primary_destination) {
 831                                 /* send a immediate HB if our RTO is stale */
 832                                 struct timeval now;
 833                                 unsigned int ms_goneby;
 834
 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;
 838                                 } else {
 839                                         ms_goneby = 0;
 840                                 }
 841                                 if ((net->dest_state & SCTP_ADDR_PF) == 0) {
 842                                         if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
 843                                                 /*
 844                                                  * no recent feed back in an
 845                                                  * RTO or more, request a
 846                                                  * RTT update
 847                                                  */
 848                                                 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
 849                                         }
 850                                 }
 851                         }
 852                 }
 853         } else {
 854                 /*
 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
 859                  */
 860                 if (sctp_threshold_management(inp, stcb, NULL,
 861                     stcb->asoc.max_send_times)) {
 862                         /* Association was destroyed */
 863                         return (1);
 864                 }
 865         }
 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);
 869                 } else {
 870                         /*
 871                          * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is
 872                          * being used, then pick dest with largest ssthresh
 873                          * for any retransmission.
 874                          */
 875                         alt = sctp_find_alternate_net(stcb, net, 1);
 876                         /*
 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.
 881                          */
 882                         net->find_pseudo_cumack = 1;
 883                         net->find_rtx_pseudo_cumack = 1;
 884                 }
 885         } else {
 886                 alt = sctp_find_alternate_net(stcb, net, 0);
 887         }
 888
 889         num_mk = 0;
 890         num_abandoned = 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;
 895
 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);
 901         }
 902         /*
 903          * setup the sat loss recovery that prevents satellite cwnd advance.
 904          */
 905         stcb->asoc.sat_t3_loss_recovery = 1;
 906         stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
 907
 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);
 914
 915                 /*
 916                  * Get the address that failed, to force a new src address
 917                  * selecton and a route allocation.
 918                  */
 919                 if (net->ro._s_addr) {
 920                         sctp_free_ifa(net->ro._s_addr);
 921                         net->ro._s_addr = NULL;
 922                 }
 923                 net->src_addr_selected = 0;
 924
 925                 /* Force a route allocation too */
 926                 if (net->ro.ro_rt) {
 927                         RTFREE(net->ro.ro_rt);
 928                         net->ro.ro_rt = NULL;
 929                 }
 930                 /* Was it our primary? */
 931                 if ((stcb->asoc.primary_destination == net) && (alt != net)) {
 932                         /*
 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.
 938                          */
 939                         if (stcb->asoc.alternate) {
 940                                 sctp_free_remote_addr(stcb->asoc.alternate);
 941                         }
 942                         stcb->asoc.alternate = alt;
 943                         atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
 944                 }
 945         }
 946         /*
 947          * Special case for cookie-echo'ed case, we don't do output but must
 948          * await the COOKIE-ACK before retransmission
 949          */
 950         if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
 951                 /*
 952                  * Here we just reset the timer and start again since we
 953                  * have not established the asoc
 954                  */
 955                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
 956                 return (0);
 957         }
 958         if (stcb->asoc.peer_supports_prsctp) {
 959                 struct sctp_tmit_chunk *lchk;
 960
 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);
 965                         if (lchk) {
 966                                 /* Assure a timer is up */
 967                                 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
 968                         }
 969                 }
 970         }
 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);
 973         }
 974         return (0);
 975 }
 976
 977 int
 978 sctp_t1init_timer(struct sctp_inpcb *inp,
 979     struct sctp_tcb *stcb,
 980     struct sctp_nets *net)
 981 {
 982         /* bump the thresholds */
 983         if (stcb->asoc.delayed_connection) {
 984                 /*
 985                  * special hook for delayed connection. The library did NOT
 986                  * complete the rest of its sends.
 987                  */
 988                 stcb->asoc.delayed_connection = 0;
 989                 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
 990                 return (0);
 991         }
 992         if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) {
 993                 return (0);
 994         }
 995         if (sctp_threshold_management(inp, stcb, net,
 996             stcb->asoc.max_init_times)) {
 997                 /* Association was destroyed */
 998                 return (1);
 999         }
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;
1004         }
1005         if (stcb->asoc.numnets > 1) {
1006                 /* If we have more than one addr use it */
1007                 struct sctp_nets *alt;
1008
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;
1013                 }
1014         }
1015         /* Send out a new init */
1016         sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1017         return (0);
1018 }
1019
1020 /*
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
1023  * course).
1024  */
1025 int
1026 sctp_cookie_timer(struct sctp_inpcb *inp,
1027     struct sctp_tcb *stcb,
1028     struct sctp_nets *net SCTP_UNUSED)
1029 {
1030         struct sctp_nets *alt;
1031         struct sctp_tmit_chunk *cookie;
1032
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) {
1036                         break;
1037                 }
1038         }
1039         if (cookie == NULL) {
1040                 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
1041                         /* FOOBAR! */
1042                         struct mbuf *op_err;
1043
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);
1048                 } else {
1049 #ifdef INVARIANTS
1050                         panic("Cookie timer expires in wrong state?");
1051 #else
1052                         SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc));
1053                         return (0);
1054 #endif
1055                 }
1056                 return (0);
1057         }
1058         /* Ok we found the cookie, threshold management next */
1059         if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1060             stcb->asoc.max_init_times)) {
1061                 /* Assoc is over */
1062                 return (1);
1063         }
1064         /*
1065          * cleared theshold management now lets backoff the address & select
1066          * an alternate
1067          */
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);
1075         }
1076         /* Now mark the retran info */
1077         if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1078                 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1079         }
1080         cookie->sent = SCTP_DATAGRAM_RESEND;
1081         /*
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).
1085          */
1086         return (0);
1087 }
1088
1089 int
1090 sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1091     struct sctp_nets *net)
1092 {
1093         struct sctp_nets *alt;
1094         struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1095
1096         if (stcb->asoc.stream_reset_outstanding == 0) {
1097                 return (0);
1098         }
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) {
1102                 return (0);
1103         }
1104         /* do threshold management */
1105         if (sctp_threshold_management(inp, stcb, strrst->whoTo,
1106             stcb->asoc.max_send_times)) {
1107                 /* Assoc is over */
1108                 return (1);
1109         }
1110         /*
1111          * cleared theshold management now lets backoff the address & select
1112          * an alternate
1113          */
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);
1119
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);
1128                         }
1129                         chk->whoTo = alt;
1130                         atomic_add_int(&alt->ref_count, 1);
1131                 }
1132         }
1133         if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1134                 /*
1135                  * If the address went un-reachable, we need to move to
1136                  * alternates for ALL chk's in queue
1137                  */
1138                 sctp_move_chunks_from_net(stcb, net);
1139         }
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;
1144
1145         /* restart the timer */
1146         sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo);
1147         return (0);
1148 }
1149
1150 int
1151 sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1152     struct sctp_nets *net)
1153 {
1154         struct sctp_nets *alt;
1155         struct sctp_tmit_chunk *asconf, *chk;
1156
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);
1161         } else {
1162                 /*
1163                  * Retransmission of the existing ASCONF is needed
1164                  */
1165
1166                 /* find the existing ASCONF */
1167                 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1168                 if (asconf == NULL) {
1169                         return (0);
1170                 }
1171                 /* do threshold management */
1172                 if (sctp_threshold_management(inp, stcb, asconf->whoTo,
1173                     stcb->asoc.max_send_times)) {
1174                         /* Assoc is over */
1175                         return (1);
1176                 }
1177                 if (asconf->snd_count > stcb->asoc.max_send_times) {
1178                         /*
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
1183                          * and cleanup.
1184                          */
1185                         SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1186                         sctp_asconf_cleanup(stcb, net);
1187                         return (0);
1188                 }
1189                 /*
1190                  * cleared threshold management, so now backoff the net and
1191                  * select an alternate
1192                  */
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);
1199                 }
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);
1205                                 chk->whoTo = alt;
1206                                 if (chk->sent != SCTP_DATAGRAM_RESEND) {
1207                                         chk->sent = SCTP_DATAGRAM_RESEND;
1208                                         sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1209                                 }
1210                                 atomic_add_int(&alt->ref_count, 1);
1211                         }
1212                 }
1213                 TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1214                         if (chk->whoTo != alt) {
1215                                 sctp_free_remote_addr(chk->whoTo);
1216                                 chk->whoTo = alt;
1217                                 atomic_add_int(&alt->ref_count, 1);
1218                         }
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;
1222                 }
1223                 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1224                         /*
1225                          * If the address went un-reachable, we need to move
1226                          * to the alternate for ALL chunks in queue
1227                          */
1228                         sctp_move_chunks_from_net(stcb, net);
1229                 }
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;
1234
1235                 /* send another ASCONF if any and we can do */
1236                 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1237         }
1238         return (0);
1239 }
1240
1241 /* Mobility adaptation */
1242 void
1243 sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1244     struct sctp_nets *net SCTP_UNUSED)
1245 {
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);
1249                 return;
1250         }
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);
1256         return;
1257 }
1258
1259 /*
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.
1264  */
1265 int
1266 sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1267     struct sctp_nets *net)
1268 {
1269         struct sctp_nets *alt;
1270
1271         /* first threshold managment */
1272         if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1273                 /* Assoc is over */
1274                 return (1);
1275         }
1276         sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1277         /* second select an alternative */
1278         alt = sctp_find_alternate_net(stcb, net, 0);
1279
1280         /* third generate a shutdown into the queue for out net */
1281         sctp_send_shutdown(stcb, alt);
1282
1283         /* fourth restart timer */
1284         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1285         return (0);
1286 }
1287
1288 int
1289 sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1290     struct sctp_nets *net)
1291 {
1292         struct sctp_nets *alt;
1293
1294         /* first threshold managment */
1295         if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1296                 /* Assoc is over */
1297                 return (1);
1298         }
1299         sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1300         /* second select an alternative */
1301         alt = sctp_find_alternate_net(stcb, net, 0);
1302
1303         /* third generate a shutdown into the queue for out net */
1304         sctp_send_shutdown_ack(stcb, alt);
1305
1306         /* fourth restart timer */
1307         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1308         return (0);
1309 }
1310
1311 static void
1312 sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp,
1313     struct sctp_tcb *stcb)
1314 {
1315         struct sctp_stream_queue_pending *sp;
1316         unsigned int i, chks_in_queue = 0;
1317         int being_filled = 0;
1318
1319         /*
1320          * This function is ONLY called when the send/sent queues are empty.
1321          */
1322         if ((stcb == NULL) || (inp == NULL))
1323                 return;
1324
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;
1329         }
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");
1336                 } else {
1337                         /* no streams lost */
1338                         stcb->asoc.total_output_queue_size = 0;
1339                 }
1340         }
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)
1346                                         being_filled++;
1347                                 chks_in_queue++;
1348                         }
1349                 }
1350         }
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);
1354         }
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))) {
1360                         /*
1361                          * Probably should go in and make it go back through
1362                          * and add fragments allowed
1363                          */
1364                         if (being_filled == 0) {
1365                                 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1366                                     chks_in_queue);
1367                         }
1368                 }
1369         } else {
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;
1373         }
1374 }
1375
1376 int
1377 sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1378     struct sctp_nets *net)
1379 {
1380         uint8_t net_was_pf;
1381
1382         if (net->dest_state & SCTP_ADDR_PF) {
1383                 net_was_pf = 1;
1384         } else {
1385                 net_was_pf = 0;
1386         }
1387         if (net->hb_responded == 0) {
1388                 if (net->ro._s_addr) {
1389                         /*
1390                          * Invalidate the src address if we did not get a
1391                          * response last time.
1392                          */
1393                         sctp_free_ifa(net->ro._s_addr);
1394                         net->ro._s_addr = NULL;
1395                         net->src_addr_selected = 0;
1396                 }
1397                 sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1398                 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1399                         /* Assoc is over */
1400                         return (1);
1401                 }
1402         }
1403         /* Zero PBA, if it needs it */
1404         if (net->partial_bytes_acked) {
1405                 net->partial_bytes_acked = 0;
1406         }
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);
1411         }
1412         if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1413             !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1414                 /*
1415                  * when move to PF during threshold mangement, a HB has been
1416                  * queued in that routine
1417                  */
1418                 uint32_t ms_gone_by;
1419
1420                 if ((net->last_sent_time.tv_sec > 0) ||
1421                     (net->last_sent_time.tv_usec > 0)) {
1422                         struct timeval diff;
1423
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);
1428                 } else {
1429                         ms_gone_by = 0xffffffff;
1430                 }
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);
1434                 }
1435         }
1436         return (0);
1437 }
1438
1439 void
1440 sctp_pathmtu_timer(struct sctp_inpcb *inp,
1441     struct sctp_tcb *stcb,
1442     struct sctp_nets *net)
1443 {
1444         uint32_t next_mtu, mtu;
1445
1446         next_mtu = sctp_get_next_mtu(net->mtu);
1447
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;
1460
1461                                         /* KAME hack: embed scopeid */
1462                                         (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1463                                 }
1464 #endif
1465
1466                                 net->ro._s_addr = sctp_source_address_selection(inp,
1467                                     stcb,
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;
1473
1474                                         (void)sa6_recoverscope(sin6);
1475                                 }
1476 #endif                          /* INET6 */
1477                         }
1478                         if (net->ro._s_addr)
1479                                 net->src_addr_selected = 1;
1480                 }
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);
1483                         if (net->port) {
1484                                 mtu -= sizeof(struct udphdr);
1485                         }
1486                         if (mtu > next_mtu) {
1487                                 net->mtu = next_mtu;
1488                         }
1489                 }
1490         }
1491         /* restart the timer */
1492         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1493 }
1494
1495 void
1496 sctp_autoclose_timer(struct sctp_inpcb *inp,
1497     struct sctp_tcb *stcb,
1498     struct sctp_nets *net)
1499 {
1500         struct timeval tn, *tim_touse;
1501         struct sctp_association *asoc;
1502         int ticks_gone_by;
1503
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 */
1508                 asoc = &stcb->asoc;
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;
1513                 } else {
1514                         tim_touse = &asoc->time_last_sent;
1515                 }
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)) {
1520                         /*
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
1525                          * shutdown
1526                          */
1527                         sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1528                         /* Are we clean? */
1529                         if (TAILQ_EMPTY(&asoc->send_queue) &&
1530                             TAILQ_EMPTY(&asoc->sent_queue)) {
1531                                 /*
1532                                  * there is nothing queued to send, so I'm
1533                                  * done...
1534                                  */
1535                                 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1536                                         /* only send SHUTDOWN 1st time thru */
1537                                         struct sctp_nets *netp;
1538
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);
1542                                         }
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;
1548                                         } else {
1549                                                 netp = stcb->asoc.primary_destination;
1550                                         }
1551                                         sctp_send_shutdown(stcb, netp);
1552                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1553                                             stcb->sctp_ep, stcb,
1554                                             netp);
1555                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1556                                             stcb->sctp_ep, stcb,
1557                                             netp);
1558                                 }
1559                         }
1560                 } else {
1561                         /*
1562                          * No auto close at this time, reset t-o to check
1563                          * later
1564                          */
1565                         int tmp;
1566
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,
1571                             net);
1572                         /* restore the real tick value */
1573                         asoc->sctp_autoclose_ticks = tmp;
1574                 }
1575         }
1576 }