1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3235828Stuexen * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4235828Stuexen * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5163953Srrs * 6163953Srrs * Redistribution and use in source and binary forms, with or without 7163953Srrs * modification, are permitted provided that the following conditions are met: 8163953Srrs * 9163953Srrs * a) Redistributions of source code must retain the above copyright notice, 10228653Stuexen * this list of conditions and the following disclaimer. 11163953Srrs * 12163953Srrs * b) Redistributions in binary form must reproduce the above copyright 13163953Srrs * notice, this list of conditions and the following disclaimer in 14228653Stuexen * the documentation and/or other materials provided with the distribution. 15163953Srrs * 16163953Srrs * c) Neither the name of Cisco Systems, Inc. nor the names of its 17163953Srrs * contributors may be used to endorse or promote products derived 18163953Srrs * from this software without specific prior written permission. 19163953Srrs * 20163953Srrs * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21163953Srrs * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22163953Srrs * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23163953Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24163953Srrs * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25163953Srrs * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26163953Srrs * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27163953Srrs * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28163953Srrs * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29163953Srrs * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30163953Srrs * THE POSSIBILITY OF SUCH DAMAGE. 31163953Srrs */ 32163953Srrs 33163953Srrs#include <sys/cdefs.h> 34163953Srrs__FBSDID("$FreeBSD: stable/11/sys/netinet/sctp_timer.c 361471 2020-05-25 20:07:23Z tuexen $"); 35163953Srrs 36163953Srrs#define _IP_VHL 37166086Srrs#include <netinet/sctp_os.h> 38163953Srrs#include <netinet/sctp_pcb.h> 39163953Srrs#ifdef INET6 40163953Srrs#endif 41163953Srrs#include <netinet/sctp_var.h> 42167598Srrs#include <netinet/sctp_sysctl.h> 43163953Srrs#include <netinet/sctp_timer.h> 44163953Srrs#include <netinet/sctputil.h> 45163953Srrs#include <netinet/sctp_output.h> 46163953Srrs#include <netinet/sctp_header.h> 47163953Srrs#include <netinet/sctp_indata.h> 48163953Srrs#include <netinet/sctp_asconf.h> 49163953Srrs#include <netinet/sctp_input.h> 50163953Srrs#include <netinet/sctp.h> 51163953Srrs#include <netinet/sctp_uio.h> 52268526Stuexen#if defined(INET) || defined(INET6) 53185694Srrs#include <netinet/udp.h> 54268526Stuexen#endif 55163953Srrs 56163953Srrs 57163953Srrsvoid 58163953Srrssctp_audit_retranmission_queue(struct sctp_association *asoc) 59163953Srrs{ 60163953Srrs struct sctp_tmit_chunk *chk; 61163953Srrs 62169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n", 63169420Srrs asoc->sent_queue_retran_cnt, 64169420Srrs asoc->sent_queue_cnt); 65163953Srrs asoc->sent_queue_retran_cnt = 0; 66163953Srrs asoc->sent_queue_cnt = 0; 67163953Srrs TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 68163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 69163953Srrs sctp_ucount_incr(asoc->sent_queue_retran_cnt); 70163953Srrs } 71163953Srrs asoc->sent_queue_cnt++; 72163953Srrs } 73163953Srrs TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 74163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 75163953Srrs sctp_ucount_incr(asoc->sent_queue_retran_cnt); 76163953Srrs } 77163953Srrs } 78179157Srrs TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) { 79179157Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 80179157Srrs sctp_ucount_incr(asoc->sent_queue_retran_cnt); 81179157Srrs } 82179157Srrs } 83169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n", 84169420Srrs asoc->sent_queue_retran_cnt, 85169420Srrs asoc->sent_queue_cnt); 86163953Srrs} 87163953Srrs 88295709Stuexenstatic int 89163953Srrssctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 90163953Srrs struct sctp_nets *net, uint16_t threshold) 91163953Srrs{ 92163953Srrs if (net) { 93163953Srrs net->error_count++; 94169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n", 95240148Stuexen (void *)net, net->error_count, 96169420Srrs net->failure_threshold); 97163953Srrs if (net->error_count > net->failure_threshold) { 98163953Srrs /* We had a threshold failure */ 99163953Srrs if (net->dest_state & SCTP_ADDR_REACHABLE) { 100163953Srrs net->dest_state &= ~SCTP_ADDR_REACHABLE; 101167598Srrs net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; 102224641Stuexen net->dest_state &= ~SCTP_ADDR_PF; 103163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 104235414Stuexen stcb, 0, 105172090Srrs (void *)net, SCTP_SO_NOT_LOCKED); 106163953Srrs } 107224641Stuexen } else if ((net->pf_threshold < net->failure_threshold) && 108224641Stuexen (net->error_count > net->pf_threshold)) { 109224641Stuexen if (!(net->dest_state & SCTP_ADDR_PF)) { 110224641Stuexen net->dest_state |= SCTP_ADDR_PF; 111224641Stuexen net->last_active = sctp_get_tick_count(); 112224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 113283650Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, 114295709Stuexen inp, stcb, net, 115283650Stuexen SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); 116295709Stuexen sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); 117224641Stuexen } 118163953Srrs } 119163953Srrs } 120163953Srrs if (stcb == NULL) 121163953Srrs return (0); 122163953Srrs 123163953Srrs if (net) { 124163953Srrs if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { 125179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 126171943Srrs sctp_misc_ints(SCTP_THRESHOLD_INCR, 127171943Srrs stcb->asoc.overall_error_count, 128171943Srrs (stcb->asoc.overall_error_count + 1), 129171943Srrs SCTP_FROM_SCTP_TIMER, 130171943Srrs __LINE__); 131171943Srrs } 132163953Srrs stcb->asoc.overall_error_count++; 133163953Srrs } 134163953Srrs } else { 135179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 136171943Srrs sctp_misc_ints(SCTP_THRESHOLD_INCR, 137171943Srrs stcb->asoc.overall_error_count, 138171943Srrs (stcb->asoc.overall_error_count + 1), 139171943Srrs SCTP_FROM_SCTP_TIMER, 140171943Srrs __LINE__); 141171943Srrs } 142163953Srrs stcb->asoc.overall_error_count++; 143163953Srrs } 144169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n", 145240148Stuexen (void *)&stcb->asoc, stcb->asoc.overall_error_count, 146310773Stuexen (uint32_t)threshold, 147310773Stuexen ((net == NULL) ? (uint32_t)0 : (uint32_t)net->dest_state)); 148163953Srrs /* 149163953Srrs * We specifically do not do >= to give the assoc one more change 150163953Srrs * before we fail it. 151163953Srrs */ 152163953Srrs if (stcb->asoc.overall_error_count > threshold) { 153163953Srrs /* Abort notification sends a ULP notify */ 154263237Stuexen struct mbuf *op_err; 155163953Srrs 156285925Stuexen op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 157279841Stuexen "Association error counter exceeded"); 158283650Stuexen inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_2; 159263237Stuexen sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED); 160163953Srrs return (1); 161163953Srrs } 162163953Srrs return (0); 163163953Srrs} 164163953Srrs 165214928Stuexen/* 166214928Stuexen * sctp_find_alternate_net() returns a non-NULL pointer as long 167214928Stuexen * the argument net is non-NULL. 168214928Stuexen */ 169163953Srrsstruct sctp_nets * 170163953Srrssctp_find_alternate_net(struct sctp_tcb *stcb, 171163953Srrs struct sctp_nets *net, 172171440Srrs int mode) 173163953Srrs{ 174163953Srrs /* Find and return an alternate network if possible */ 175171440Srrs struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL; 176163953Srrs int once; 177163953Srrs 178171440Srrs /* JRS 5/14/07 - Initialize min_errors to an impossible value. */ 179171440Srrs int min_errors = -1; 180171440Srrs uint32_t max_cwnd = 0; 181171440Srrs 182163953Srrs if (stcb->asoc.numnets == 1) { 183163953Srrs /* No others but net */ 184163953Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 185163953Srrs } 186171440Srrs /* 187171440Srrs * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate 188171440Srrs * net algorithm. This algorithm chooses the active destination (not 189171440Srrs * in PF state) with the largest cwnd value. If all destinations are 190171440Srrs * in PF state, unreachable, or unconfirmed, choose the desination 191171440Srrs * that is in PF state with the lowest error count. In case of a 192171440Srrs * tie, choose the destination that was most recently active. 193171440Srrs */ 194171440Srrs if (mode == 2) { 195163953Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 196310773Stuexen /* 197310773Stuexen * JRS 5/14/07 - If the destination is unreachable 198310773Stuexen * or unconfirmed, skip it. 199310773Stuexen */ 200163953Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 201171440Srrs (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 202171440Srrs continue; 203171440Srrs } 204171440Srrs /* 205171440Srrs * JRS 5/14/07 - If the destination is reachable 206171440Srrs * but in PF state, compare the error count of the 207171440Srrs * destination to the minimum error count seen thus 208171440Srrs * far. Store the destination with the lower error 209171440Srrs * count. If the error counts are equal, store the 210171440Srrs * destination that was most recently active. 211171440Srrs */ 212171440Srrs if (mnet->dest_state & SCTP_ADDR_PF) { 213171440Srrs /* 214171440Srrs * JRS 5/14/07 - If the destination under 215171440Srrs * consideration is the current destination, 216171440Srrs * work as if the error count is one higher. 217171440Srrs * The actual error count will not be 218171440Srrs * incremented until later in the t3 219171440Srrs * handler. 220171440Srrs */ 221171440Srrs if (mnet == net) { 222171440Srrs if (min_errors == -1) { 223171440Srrs min_errors = mnet->error_count + 1; 224171440Srrs min_errors_net = mnet; 225171440Srrs } else if (mnet->error_count + 1 < min_errors) { 226171440Srrs min_errors = mnet->error_count + 1; 227171440Srrs min_errors_net = mnet; 228171440Srrs } else if (mnet->error_count + 1 == min_errors 229171440Srrs && mnet->last_active > min_errors_net->last_active) { 230171440Srrs min_errors_net = mnet; 231171440Srrs min_errors = mnet->error_count + 1; 232171440Srrs } 233171440Srrs continue; 234171440Srrs } else { 235171440Srrs if (min_errors == -1) { 236171440Srrs min_errors = mnet->error_count; 237171440Srrs min_errors_net = mnet; 238171440Srrs } else if (mnet->error_count < min_errors) { 239171440Srrs min_errors = mnet->error_count; 240171440Srrs min_errors_net = mnet; 241171440Srrs } else if (mnet->error_count == min_errors 242171440Srrs && mnet->last_active > min_errors_net->last_active) { 243171440Srrs min_errors_net = mnet; 244171440Srrs min_errors = mnet->error_count; 245171440Srrs } 246171440Srrs continue; 247171440Srrs } 248171440Srrs } 249171440Srrs /* 250171440Srrs * JRS 5/14/07 - If the destination is reachable and 251171440Srrs * not in PF state, compare the cwnd of the 252171440Srrs * destination to the highest cwnd seen thus far. 253171440Srrs * Store the destination with the higher cwnd value. 254171440Srrs * If the cwnd values are equal, randomly choose one 255171440Srrs * of the two destinations. 256171440Srrs */ 257171440Srrs if (max_cwnd < mnet->cwnd) { 258171440Srrs max_cwnd_net = mnet; 259171440Srrs max_cwnd = mnet->cwnd; 260171440Srrs } else if (max_cwnd == mnet->cwnd) { 261171440Srrs uint32_t rndval; 262171440Srrs uint8_t this_random; 263171440Srrs 264171440Srrs if (stcb->asoc.hb_random_idx > 3) { 265171440Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 266171440Srrs memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values)); 267171440Srrs this_random = stcb->asoc.hb_random_values[0]; 268171440Srrs stcb->asoc.hb_random_idx++; 269171440Srrs stcb->asoc.hb_ect_randombit = 0; 270171440Srrs } else { 271171440Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 272171440Srrs stcb->asoc.hb_random_idx++; 273171440Srrs stcb->asoc.hb_ect_randombit = 0; 274171440Srrs } 275171440Srrs if (this_random % 2 == 1) { 276171440Srrs max_cwnd_net = mnet; 277180387Srrs max_cwnd = mnet->cwnd; /* Useless? */ 278171440Srrs } 279171440Srrs } 280171440Srrs } 281171440Srrs if (max_cwnd_net == NULL) { 282171440Srrs if (min_errors_net == NULL) { 283171440Srrs return (net); 284171440Srrs } 285171440Srrs return (min_errors_net); 286171440Srrs } else { 287171440Srrs return (max_cwnd_net); 288171440Srrs } 289310218Stuexen } /* JRS 5/14/07 - If mode is set to 1, use the 290310773Stuexen * CMT policy for choosing an alternate net. */ 291171440Srrs else if (mode == 1) { 292171440Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 293171440Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 294214928Stuexen (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 295163953Srrs /* 296163953Srrs * will skip ones that are not-reachable or 297163953Srrs * unconfirmed 298163953Srrs */ 299163953Srrs continue; 300163953Srrs } 301171440Srrs if (max_cwnd < mnet->cwnd) { 302171440Srrs max_cwnd_net = mnet; 303171440Srrs max_cwnd = mnet->cwnd; 304171440Srrs } else if (max_cwnd == mnet->cwnd) { 305163953Srrs uint32_t rndval; 306163953Srrs uint8_t this_random; 307163953Srrs 308163953Srrs if (stcb->asoc.hb_random_idx > 3) { 309163953Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 310163953Srrs memcpy(stcb->asoc.hb_random_values, &rndval, 311163953Srrs sizeof(stcb->asoc.hb_random_values)); 312163953Srrs this_random = stcb->asoc.hb_random_values[0]; 313163953Srrs stcb->asoc.hb_random_idx = 0; 314163953Srrs stcb->asoc.hb_ect_randombit = 0; 315163953Srrs } else { 316163953Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 317163953Srrs stcb->asoc.hb_random_idx++; 318163953Srrs stcb->asoc.hb_ect_randombit = 0; 319163953Srrs } 320163953Srrs if (this_random % 2) { 321171440Srrs max_cwnd_net = mnet; 322171440Srrs max_cwnd = mnet->cwnd; 323163953Srrs } 324163953Srrs } 325163953Srrs } 326171440Srrs if (max_cwnd_net) { 327171440Srrs return (max_cwnd_net); 328163953Srrs } 329163953Srrs } 330163953Srrs mnet = net; 331163953Srrs once = 0; 332163953Srrs 333163953Srrs if (mnet == NULL) { 334163953Srrs mnet = TAILQ_FIRST(&stcb->asoc.nets); 335212225Srrs if (mnet == NULL) { 336212225Srrs return (NULL); 337212225Srrs } 338163953Srrs } 339277380Stuexen for (;;) { 340163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 341163953Srrs if (alt == NULL) { 342163953Srrs once++; 343163953Srrs if (once > 1) { 344163953Srrs break; 345163953Srrs } 346163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 347212225Srrs if (alt == NULL) { 348212225Srrs return (NULL); 349212225Srrs } 350163953Srrs } 351163953Srrs if (alt->ro.ro_rt == NULL) { 352167598Srrs if (alt->ro._s_addr) { 353167598Srrs sctp_free_ifa(alt->ro._s_addr); 354167598Srrs alt->ro._s_addr = NULL; 355167598Srrs } 356163953Srrs alt->src_addr_selected = 0; 357163953Srrs } 358214928Stuexen if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && 359163953Srrs (alt->ro.ro_rt != NULL) && 360214928Stuexen (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) { 361163953Srrs /* Found a reachable address */ 362163953Srrs break; 363163953Srrs } 364163953Srrs mnet = alt; 365277380Stuexen } 366163953Srrs 367163953Srrs if (alt == NULL) { 368163953Srrs /* Case where NO insv network exists (dormant state) */ 369163953Srrs /* we rotate destinations */ 370163953Srrs once = 0; 371163953Srrs mnet = net; 372277380Stuexen for (;;) { 373212225Srrs if (mnet == NULL) { 374212225Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 375212225Srrs } 376163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 377163953Srrs if (alt == NULL) { 378163953Srrs once++; 379163953Srrs if (once > 1) { 380163953Srrs break; 381163953Srrs } 382163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 383277380Stuexen if (alt == NULL) { 384277380Stuexen break; 385277380Stuexen } 386163953Srrs } 387163953Srrs if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) && 388163953Srrs (alt != net)) { 389163953Srrs /* Found an alternate address */ 390163953Srrs break; 391163953Srrs } 392163953Srrs mnet = alt; 393277380Stuexen } 394163953Srrs } 395163953Srrs if (alt == NULL) { 396163953Srrs return (net); 397163953Srrs } 398163953Srrs return (alt); 399163953Srrs} 400163953Srrs 401163953Srrsstatic void 402163953Srrssctp_backoff_on_timeout(struct sctp_tcb *stcb, 403163953Srrs struct sctp_nets *net, 404163953Srrs int win_probe, 405210599Srrs int num_marked, int num_abandoned) 406163953Srrs{ 407170642Srrs if (net->RTO == 0) { 408289240Stuexen if (net->RTO_measured) { 409289240Stuexen net->RTO = stcb->asoc.minrto; 410289240Stuexen } else { 411289240Stuexen net->RTO = stcb->asoc.initial_rto; 412289240Stuexen } 413170642Srrs } 414163953Srrs net->RTO <<= 1; 415163953Srrs if (net->RTO > stcb->asoc.maxrto) { 416163953Srrs net->RTO = stcb->asoc.maxrto; 417163953Srrs } 418210599Srrs if ((win_probe == 0) && (num_marked || num_abandoned)) { 419163953Srrs /* We don't apply penalty to window probe scenarios */ 420171440Srrs /* JRS - Use the congestion control given in the CC module */ 421171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 422163953Srrs } 423163953Srrs} 424163953Srrs 425184333Srrs#ifndef INVARIANTS 426184333Srrsstatic void 427182367Srrssctp_recover_sent_list(struct sctp_tcb *stcb) 428182367Srrs{ 429216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 430182367Srrs struct sctp_association *asoc; 431182367Srrs 432182367Srrs asoc = &stcb->asoc; 433216822Stuexen TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 434310219Stuexen if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.tsn)) { 435182367Srrs SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", 436310219Stuexen (void *)chk, chk->rec.data.tsn, asoc->last_acked_seq); 437243157Stuexen if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 438310219Stuexen if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 439310219Stuexen asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 440242714Stuexen } 441242714Stuexen } 442310219Stuexen if ((asoc->strmout[chk->rec.data.sid].chunks_on_queues == 0) && 443310219Stuexen (asoc->strmout[chk->rec.data.sid].state == SCTP_STREAM_RESET_PENDING) && 444310219Stuexen TAILQ_EMPTY(&asoc->strmout[chk->rec.data.sid].outqueue)) { 445291700Stuexen asoc->trigger_reset = 1; 446291700Stuexen } 447182367Srrs TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 448255190Stuexen if (PR_SCTP_ENABLED(chk->flags)) { 449182367Srrs if (asoc->pr_sctp_cnt != 0) 450182367Srrs asoc->pr_sctp_cnt--; 451182367Srrs } 452182367Srrs if (chk->data) { 453182367Srrs /* sa_ignore NO_NULL_CHK */ 454182367Srrs sctp_free_bufspace(stcb, asoc, chk, 1); 455182367Srrs sctp_m_freem(chk->data); 456216822Stuexen chk->data = NULL; 457269448Stuexen if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) { 458182367Srrs asoc->sent_queue_cnt_removeable--; 459182367Srrs } 460182367Srrs } 461182367Srrs asoc->sent_queue_cnt--; 462221627Stuexen sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 463182367Srrs } 464182367Srrs } 465182367Srrs SCTP_PRINTF("after recover order is as follows\n"); 466216822Stuexen TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 467310219Stuexen SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.tsn); 468182367Srrs } 469182367Srrs} 470184333Srrs#endif 471184333Srrs 472163953Srrsstatic int 473163953Srrssctp_mark_all_for_resend(struct sctp_tcb *stcb, 474163953Srrs struct sctp_nets *net, 475163953Srrs struct sctp_nets *alt, 476163953Srrs int window_probe, 477210599Srrs int *num_marked, 478210599Srrs int *num_abandoned) 479163953Srrs{ 480163953Srrs 481163953Srrs /* 482163953Srrs * Mark all chunks (well not all) that were sent to *net for 483163953Srrs * retransmission. Move them to alt for there destination as well... 484163953Srrs * We only mark chunks that have been outstanding long enough to 485163953Srrs * have received feed-back. 486163953Srrs */ 487216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 488163953Srrs struct sctp_nets *lnets; 489163953Srrs struct timeval now, min_wait, tv; 490219014Stuexen int cur_rto; 491210599Srrs int cnt_abandoned; 492168709Srrs int audit_tf, num_mk, fir; 493163953Srrs unsigned int cnt_mk; 494168709Srrs uint32_t orig_flight, orig_tf; 495163953Srrs uint32_t tsnlast, tsnfirst; 496182367Srrs int recovery_cnt = 0; 497163953Srrs 498171440Srrs 499163953Srrs /* none in flight now */ 500163953Srrs audit_tf = 0; 501163953Srrs fir = 0; 502163953Srrs /* 503163953Srrs * figure out how long a data chunk must be pending before we can 504163953Srrs * mark it .. 505163953Srrs */ 506169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 507163953Srrs /* get cur rto in micro-seconds */ 508219014Stuexen cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; 509219014Stuexen cur_rto *= 1000; 510224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 511219014Stuexen sctp_log_fr(cur_rto, 512170744Srrs stcb->asoc.peers_rwnd, 513170744Srrs window_probe, 514170744Srrs SCTP_FR_T3_MARK_TIME); 515224641Stuexen sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT); 516170744Srrs sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 517170744Srrs } 518219014Stuexen tv.tv_sec = cur_rto / 1000000; 519219014Stuexen tv.tv_usec = cur_rto % 1000000; 520163953Srrs min_wait = now; 521163953Srrs timevalsub(&min_wait, &tv); 522163953Srrs if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 523163953Srrs /* 524163953Srrs * if we hit here, we don't have enough seconds on the clock 525163953Srrs * to account for the RTO. We just let the lower seconds be 526163953Srrs * the bounds and don't worry about it. This may mean we 527163953Srrs * will mark a lot more than we should. 528163953Srrs */ 529163953Srrs min_wait.tv_sec = min_wait.tv_usec = 0; 530163953Srrs } 531224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 532219014Stuexen sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 533170744Srrs sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 534170744Srrs } 535163953Srrs /* 536163953Srrs * Our rwnd will be incorrect here since we are not adding back the 537163953Srrs * cnt * mbuf but we will fix that down below. 538163953Srrs */ 539163953Srrs orig_flight = net->flight_size; 540168709Srrs orig_tf = stcb->asoc.total_flight; 541168709Srrs 542163953Srrs net->fast_retran_ip = 0; 543163953Srrs /* Now on to each chunk */ 544210599Srrs cnt_abandoned = 0; 545163953Srrs num_mk = cnt_mk = 0; 546163953Srrs tsnfirst = tsnlast = 0; 547184333Srrs#ifndef INVARIANTS 548182367Srrsstart_again: 549184333Srrs#endif 550216822Stuexen TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) { 551310219Stuexen if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.tsn)) { 552163953Srrs /* Strange case our list got out of order? */ 553257359Stuexen SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n", 554310219Stuexen (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.tsn); 555182367Srrs recovery_cnt++; 556182367Srrs#ifdef INVARIANTS 557182367Srrs panic("last acked >= chk on sent-Q"); 558182367Srrs#else 559182367Srrs SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); 560182367Srrs sctp_recover_sent_list(stcb); 561182367Srrs if (recovery_cnt < 10) { 562182367Srrs goto start_again; 563182367Srrs } else { 564182367Srrs SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); 565182367Srrs } 566182367Srrs#endif 567163953Srrs } 568163953Srrs if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 569163953Srrs /* 570163953Srrs * found one to mark: If it is less than 571163953Srrs * DATAGRAM_ACKED it MUST not be a skipped or marked 572163953Srrs * TSN but instead one that is either already set 573163953Srrs * for retransmission OR one that needs 574163953Srrs * retransmission. 575163953Srrs */ 576163953Srrs 577163953Srrs /* validate its been outstanding long enough */ 578224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 579310219Stuexen sctp_log_fr(chk->rec.data.tsn, 580170744Srrs chk->sent_rcv_time.tv_sec, 581170744Srrs chk->sent_rcv_time.tv_usec, 582170744Srrs SCTP_FR_T3_MARK_TIME); 583170744Srrs } 584163953Srrs if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 585163953Srrs /* 586163953Srrs * we have reached a chunk that was sent 587163953Srrs * some seconds past our min.. forget it we 588163953Srrs * will find no more to send. 589163953Srrs */ 590224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 591170744Srrs sctp_log_fr(0, 592170744Srrs chk->sent_rcv_time.tv_sec, 593170744Srrs chk->sent_rcv_time.tv_usec, 594170744Srrs SCTP_FR_T3_STOPPED); 595170744Srrs } 596163953Srrs continue; 597163953Srrs } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 598163953Srrs (window_probe == 0)) { 599163953Srrs /* 600163953Srrs * we must look at the micro seconds to 601163953Srrs * know. 602163953Srrs */ 603163953Srrs if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 604163953Srrs /* 605163953Srrs * ok it was sent after our boundary 606163953Srrs * time. 607163953Srrs */ 608163953Srrs continue; 609163953Srrs } 610163953Srrs } 611269448Stuexen if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) { 612163953Srrs /* Is it expired? */ 613212801Stuexen if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { 614163953Srrs /* Yes so drop it */ 615163953Srrs if (chk->data) { 616169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 617163953Srrs chk, 618235416Stuexen 1, 619189790Srrs SCTP_SO_NOT_LOCKED); 620210599Srrs cnt_abandoned++; 621163953Srrs } 622185694Srrs continue; 623163953Srrs } 624163953Srrs } 625269448Stuexen if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) { 626163953Srrs /* Has it been retransmitted tv_sec times? */ 627163953Srrs if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 628163953Srrs if (chk->data) { 629169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 630163953Srrs chk, 631235416Stuexen 1, 632189790Srrs SCTP_SO_NOT_LOCKED); 633210599Srrs cnt_abandoned++; 634163953Srrs } 635185694Srrs continue; 636163953Srrs } 637163953Srrs } 638168709Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 639163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 640163953Srrs num_mk++; 641163953Srrs if (fir == 0) { 642163953Srrs fir = 1; 643310219Stuexen tsnfirst = chk->rec.data.tsn; 644163953Srrs } 645310219Stuexen tsnlast = chk->rec.data.tsn; 646224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 647310219Stuexen sctp_log_fr(chk->rec.data.tsn, chk->snd_count, 648170744Srrs 0, SCTP_FR_T3_MARKED); 649170744Srrs } 650347154Stuexen 651168709Srrs if (chk->rec.data.chunk_was_revoked) { 652168709Srrs /* deflate the cwnd */ 653168709Srrs chk->whoTo->cwnd -= chk->book_size; 654168709Srrs chk->rec.data.chunk_was_revoked = 0; 655168709Srrs } 656168709Srrs net->marked_retrans++; 657168709Srrs stcb->asoc.marked_retrans++; 658179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 659170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 660170744Srrs chk->whoTo->flight_size, 661170744Srrs chk->book_size, 662310773Stuexen (uint32_t)(uintptr_t)chk->whoTo, 663310219Stuexen chk->rec.data.tsn); 664170744Srrs } 665168709Srrs sctp_flight_size_decrease(chk); 666168709Srrs sctp_total_flight_decrease(stcb, chk); 667168709Srrs stcb->asoc.peers_rwnd += chk->send_size; 668179783Srrs stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 669163953Srrs } 670163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 671319407Stuexen chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 672163953Srrs SCTP_STAT_INCR(sctps_markedretrans); 673165220Srrs 674163953Srrs /* reset the TSN for striking and other FR stuff */ 675163953Srrs chk->rec.data.doing_fast_retransmit = 0; 676163953Srrs /* Clear any time so NO RTT is being done */ 677219397Srrs 678219397Srrs if (chk->do_rtt) { 679219397Srrs if (chk->whoTo->rto_needed == 0) { 680219397Srrs chk->whoTo->rto_needed = 1; 681219397Srrs } 682219397Srrs } 683163953Srrs chk->do_rtt = 0; 684163953Srrs if (alt != net) { 685163953Srrs sctp_free_remote_addr(chk->whoTo); 686163953Srrs chk->no_fr_allowed = 1; 687163953Srrs chk->whoTo = alt; 688163953Srrs atomic_add_int(&alt->ref_count, 1); 689163953Srrs } else { 690163953Srrs chk->no_fr_allowed = 0; 691163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 692163953Srrs chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 693163953Srrs } else { 694310219Stuexen chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn; 695163953Srrs } 696163953Srrs } 697170181Srrs /* 698170181Srrs * CMT: Do not allow FRs on retransmitted TSNs. 699170181Srrs */ 700216669Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 701163953Srrs chk->no_fr_allowed = 1; 702163953Srrs } 703210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 704163953Srrs } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 705163953Srrs /* remember highest acked one */ 706163953Srrs could_be_sent = chk; 707210599Srrs#endif 708163953Srrs } 709163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 710163953Srrs cnt_mk++; 711163953Srrs } 712163953Srrs } 713168709Srrs if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 714168709Srrs /* we did not subtract the same things? */ 715168709Srrs audit_tf = 1; 716168709Srrs } 717347154Stuexen 718224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 719170744Srrs sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 720170744Srrs } 721163953Srrs#ifdef SCTP_DEBUG 722169420Srrs if (num_mk) { 723169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 724169420Srrs tsnlast); 725319394Stuexen SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%u\n", 726169420Srrs num_mk, 727319394Stuexen stcb->asoc.peers_rwnd); 728163953Srrs } 729163953Srrs#endif 730163953Srrs *num_marked = num_mk; 731210599Srrs *num_abandoned = cnt_abandoned; 732210493Srrs /* 733210493Srrs * Now check for a ECN Echo that may be stranded And include the 734210493Srrs * cnt_mk'd to have all resends in the control queue. 735210493Srrs */ 736210493Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 737210493Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 738210493Srrs cnt_mk++; 739210493Srrs } 740210493Srrs if ((chk->whoTo == net) && 741210493Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 742210493Srrs sctp_free_remote_addr(chk->whoTo); 743210493Srrs chk->whoTo = alt; 744210493Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 745210493Srrs chk->sent = SCTP_DATAGRAM_RESEND; 746319407Stuexen chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 747210493Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 748210493Srrs cnt_mk++; 749210493Srrs } 750210493Srrs atomic_add_int(&alt->ref_count, 1); 751210493Srrs } 752210493Srrs } 753210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 754163953Srrs if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 755163953Srrs /* fix it so we retransmit the highest acked anyway */ 756163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 757163953Srrs cnt_mk++; 758163953Srrs could_be_sent->sent = SCTP_DATAGRAM_RESEND; 759163953Srrs } 760210599Srrs#endif 761163953Srrs if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 762165220Srrs#ifdef INVARIANTS 763171477Srrs SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 764171477Srrs cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 765163953Srrs#endif 766163953Srrs#ifndef SCTP_AUDITING_ENABLED 767163953Srrs stcb->asoc.sent_queue_retran_cnt = cnt_mk; 768163953Srrs#endif 769163953Srrs } 770163953Srrs if (audit_tf) { 771169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 772169420Srrs "Audit total flight due to negative value net:%p\n", 773240148Stuexen (void *)net); 774163953Srrs stcb->asoc.total_flight = 0; 775163953Srrs stcb->asoc.total_flight_count = 0; 776163953Srrs /* Clear all networks flight size */ 777163953Srrs TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 778163953Srrs lnets->flight_size = 0; 779169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 780169420Srrs "Net:%p c-f cwnd:%d ssthresh:%d\n", 781240148Stuexen (void *)lnets, lnets->cwnd, lnets->ssthresh); 782163953Srrs } 783163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 784163953Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 785179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 786170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 787170744Srrs chk->whoTo->flight_size, 788170744Srrs chk->book_size, 789310773Stuexen (uint32_t)(uintptr_t)chk->whoTo, 790310219Stuexen chk->rec.data.tsn); 791170744Srrs } 792347154Stuexen 793168709Srrs sctp_flight_size_increase(chk); 794168709Srrs sctp_total_flight_increase(stcb, chk); 795163953Srrs } 796163953Srrs } 797163953Srrs } 798163953Srrs /* We return 1 if we only have a window probe outstanding */ 799163953Srrs return (0); 800163953Srrs} 801163953Srrs 802163953Srrs 803163953Srrsint 804163953Srrssctp_t3rxt_timer(struct sctp_inpcb *inp, 805163953Srrs struct sctp_tcb *stcb, 806163953Srrs struct sctp_nets *net) 807163953Srrs{ 808163953Srrs struct sctp_nets *alt; 809210599Srrs int win_probe, num_mk, num_abandoned; 810163953Srrs 811179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 812170744Srrs sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 813170744Srrs } 814179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 815163953Srrs struct sctp_nets *lnet; 816163953Srrs 817163953Srrs TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 818163953Srrs if (net == lnet) { 819163953Srrs sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 820163953Srrs } else { 821163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 822163953Srrs } 823163953Srrs } 824163953Srrs } 825163953Srrs /* Find an alternate and mark those for retransmission */ 826163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 827163953Srrs (stcb->asoc.total_flight < net->mtu)) { 828163953Srrs SCTP_STAT_INCR(sctps_timowindowprobe); 829163953Srrs win_probe = 1; 830163953Srrs } else { 831163953Srrs win_probe = 0; 832163953Srrs } 833168709Srrs 834163953Srrs if (win_probe == 0) { 835163953Srrs /* We don't do normal threshold management on window probes */ 836163953Srrs if (sctp_threshold_management(inp, stcb, net, 837163953Srrs stcb->asoc.max_send_times)) { 838163953Srrs /* Association was destroyed */ 839163953Srrs return (1); 840163953Srrs } else { 841163953Srrs if (net != stcb->asoc.primary_destination) { 842163953Srrs /* send a immediate HB if our RTO is stale */ 843163953Srrs struct timeval now; 844163953Srrs unsigned int ms_goneby; 845163953Srrs 846169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 847163953Srrs if (net->last_sent_time.tv_sec) { 848163953Srrs ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 849163953Srrs } else { 850163953Srrs ms_goneby = 0; 851163953Srrs } 852224641Stuexen if ((net->dest_state & SCTP_ADDR_PF) == 0) { 853224641Stuexen if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 854185694Srrs /* 855224641Stuexen * no recent feed back in an 856224641Stuexen * RTO or more, request a 857224641Stuexen * RTT update 858185694Srrs */ 859224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 860224641Stuexen } 861163953Srrs } 862163953Srrs } 863163953Srrs } 864163953Srrs } else { 865163953Srrs /* 866163953Srrs * For a window probe we don't penalize the net's but only 867163953Srrs * the association. This may fail it if SACKs are not coming 868163953Srrs * back. If sack's are coming with rwnd locked at 0, we will 869163953Srrs * continue to hold things waiting for rwnd to raise 870163953Srrs */ 871163953Srrs if (sctp_threshold_management(inp, stcb, NULL, 872163953Srrs stcb->asoc.max_send_times)) { 873163953Srrs /* Association was destroyed */ 874163953Srrs return (1); 875163953Srrs } 876163953Srrs } 877224641Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 878224641Stuexen if (net->pf_threshold < net->failure_threshold) { 879224641Stuexen alt = sctp_find_alternate_net(stcb, net, 2); 880224641Stuexen } else { 881224641Stuexen /* 882224641Stuexen * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is 883224641Stuexen * being used, then pick dest with largest ssthresh 884224641Stuexen * for any retransmission. 885224641Stuexen */ 886224641Stuexen alt = sctp_find_alternate_net(stcb, net, 1); 887224641Stuexen /* 888224641Stuexen * CUCv2: If a different dest is picked for the 889224641Stuexen * retransmission, then new (rtx-)pseudo_cumack 890224641Stuexen * needs to be tracked for orig dest. Let CUCv2 891224641Stuexen * track new (rtx-) pseudo-cumack always. 892224641Stuexen */ 893224641Stuexen net->find_pseudo_cumack = 1; 894224641Stuexen net->find_rtx_pseudo_cumack = 1; 895224641Stuexen } 896224641Stuexen } else { 897224641Stuexen alt = sctp_find_alternate_net(stcb, net, 0); 898224641Stuexen } 899224641Stuexen 900224641Stuexen num_mk = 0; 901224641Stuexen num_abandoned = 0; 902224641Stuexen (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, 903224641Stuexen &num_mk, &num_abandoned); 904224641Stuexen /* FR Loss recovery just ended with the T3. */ 905224641Stuexen stcb->asoc.fast_retran_loss_recovery = 0; 906224641Stuexen 907224641Stuexen /* CMT FR loss recovery ended with the T3 */ 908224641Stuexen net->fast_retran_loss_recovery = 0; 909224641Stuexen if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 910224641Stuexen (net->flight_size == 0)) { 911224641Stuexen (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 912224641Stuexen } 913347154Stuexen 914224641Stuexen /* 915224641Stuexen * setup the sat loss recovery that prevents satellite cwnd advance. 916224641Stuexen */ 917224641Stuexen stcb->asoc.sat_t3_loss_recovery = 1; 918224641Stuexen stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 919224641Stuexen 920224641Stuexen /* Backoff the timer and cwnd */ 921224641Stuexen sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); 922224641Stuexen if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) || 923224641Stuexen (net->dest_state & SCTP_ADDR_PF)) { 924163953Srrs /* Move all pending over too */ 925212712Stuexen sctp_move_chunks_from_net(stcb, net); 926169352Srrs 927169352Srrs /* 928169352Srrs * Get the address that failed, to force a new src address 929169352Srrs * selecton and a route allocation. 930169352Srrs */ 931169352Srrs if (net->ro._s_addr) { 932169352Srrs sctp_free_ifa(net->ro._s_addr); 933169352Srrs net->ro._s_addr = NULL; 934169352Srrs } 935169352Srrs net->src_addr_selected = 0; 936169352Srrs 937169352Srrs /* Force a route allocation too */ 938169352Srrs if (net->ro.ro_rt) { 939169352Srrs RTFREE(net->ro.ro_rt); 940169352Srrs net->ro.ro_rt = NULL; 941169352Srrs } 942347154Stuexen 943163953Srrs /* Was it our primary? */ 944163953Srrs if ((stcb->asoc.primary_destination == net) && (alt != net)) { 945163953Srrs /* 946163953Srrs * Yes, note it as such and find an alternate note: 947163953Srrs * this means HB code must use this to resent the 948163953Srrs * primary if it goes active AND if someone does a 949163953Srrs * change-primary then this flag must be cleared 950163953Srrs * from any net structures. 951163953Srrs */ 952224641Stuexen if (stcb->asoc.alternate) { 953224641Stuexen sctp_free_remote_addr(stcb->asoc.alternate); 954163953Srrs } 955224641Stuexen stcb->asoc.alternate = alt; 956224641Stuexen atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 957163953Srrs } 958163953Srrs } 959163953Srrs /* 960163953Srrs * Special case for cookie-echo'ed case, we don't do output but must 961163953Srrs * await the COOKIE-ACK before retransmission 962163953Srrs */ 963347165Stuexen if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) { 964163953Srrs /* 965163953Srrs * Here we just reset the timer and start again since we 966163953Srrs * have not established the asoc 967163953Srrs */ 968163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 969163953Srrs return (0); 970163953Srrs } 971269448Stuexen if (stcb->asoc.prsctp_supported) { 972163953Srrs struct sctp_tmit_chunk *lchk; 973163953Srrs 974163953Srrs lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 975163953Srrs /* C3. See if we need to send a Fwd-TSN */ 976216825Stuexen if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { 977163953Srrs send_forward_tsn(stcb, &stcb->asoc); 978361471Stuexen for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) { 979361471Stuexen if (lchk->whoTo != NULL) { 980361471Stuexen break; 981361471Stuexen } 982361471Stuexen } 983361471Stuexen if (lchk != NULL) { 984163953Srrs /* Assure a timer is up */ 985163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 986163953Srrs } 987163953Srrs } 988163953Srrs } 989179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 990170744Srrs sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 991170744Srrs } 992163953Srrs return (0); 993163953Srrs} 994163953Srrs 995163953Srrsint 996163953Srrssctp_t1init_timer(struct sctp_inpcb *inp, 997163953Srrs struct sctp_tcb *stcb, 998163953Srrs struct sctp_nets *net) 999163953Srrs{ 1000163953Srrs /* bump the thresholds */ 1001163953Srrs if (stcb->asoc.delayed_connection) { 1002163953Srrs /* 1003163953Srrs * special hook for delayed connection. The library did NOT 1004163953Srrs * complete the rest of its sends. 1005163953Srrs */ 1006163953Srrs stcb->asoc.delayed_connection = 0; 1007172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1008163953Srrs return (0); 1009163953Srrs } 1010347165Stuexen if (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) { 1011163953Srrs return (0); 1012163953Srrs } 1013163953Srrs if (sctp_threshold_management(inp, stcb, net, 1014163953Srrs stcb->asoc.max_init_times)) { 1015163953Srrs /* Association was destroyed */ 1016163953Srrs return (1); 1017163953Srrs } 1018163953Srrs stcb->asoc.dropped_special_cnt = 0; 1019210599Srrs sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); 1020163953Srrs if (stcb->asoc.initial_init_rto_max < net->RTO) { 1021163953Srrs net->RTO = stcb->asoc.initial_init_rto_max; 1022163953Srrs } 1023163953Srrs if (stcb->asoc.numnets > 1) { 1024163953Srrs /* If we have more than one addr use it */ 1025163953Srrs struct sctp_nets *alt; 1026163953Srrs 1027163953Srrs alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1028214928Stuexen if (alt != stcb->asoc.primary_destination) { 1029212712Stuexen sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); 1030163953Srrs stcb->asoc.primary_destination = alt; 1031163953Srrs } 1032163953Srrs } 1033163953Srrs /* Send out a new init */ 1034172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1035163953Srrs return (0); 1036163953Srrs} 1037163953Srrs 1038163953Srrs/* 1039163953Srrs * For cookie and asconf we actually need to find and mark for resend, then 1040163953Srrs * increment the resend counter (after all the threshold management stuff of 1041163953Srrs * course). 1042163953Srrs */ 1043163953Srrsint 1044163953Srrssctp_cookie_timer(struct sctp_inpcb *inp, 1045163953Srrs struct sctp_tcb *stcb, 1046228653Stuexen struct sctp_nets *net SCTP_UNUSED) 1047163953Srrs{ 1048163953Srrs struct sctp_nets *alt; 1049163953Srrs struct sctp_tmit_chunk *cookie; 1050163953Srrs 1051163953Srrs /* first before all else we must find the cookie */ 1052163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1053163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1054163953Srrs break; 1055163953Srrs } 1056163953Srrs } 1057163953Srrs if (cookie == NULL) { 1058347165Stuexen if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) { 1059163953Srrs /* FOOBAR! */ 1060263237Stuexen struct mbuf *op_err; 1061163953Srrs 1062285925Stuexen op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 1063263237Stuexen "Cookie timer expired, but no cookie"); 1064283650Stuexen inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3; 1065263237Stuexen sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED); 1066163953Srrs } else { 1067165220Srrs#ifdef INVARIANTS 1068163953Srrs panic("Cookie timer expires in wrong state?"); 1069163953Srrs#else 1070347165Stuexen SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(stcb)); 1071163953Srrs return (0); 1072163953Srrs#endif 1073163953Srrs } 1074163953Srrs return (0); 1075163953Srrs } 1076163953Srrs /* Ok we found the cookie, threshold management next */ 1077163953Srrs if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1078163953Srrs stcb->asoc.max_init_times)) { 1079163953Srrs /* Assoc is over */ 1080163953Srrs return (1); 1081163953Srrs } 1082163953Srrs /* 1083299273Stuexen * Cleared threshold management, now lets backoff the address and 1084299273Stuexen * select an alternate 1085163953Srrs */ 1086163953Srrs stcb->asoc.dropped_special_cnt = 0; 1087210599Srrs sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); 1088163953Srrs alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1089163953Srrs if (alt != cookie->whoTo) { 1090163953Srrs sctp_free_remote_addr(cookie->whoTo); 1091163953Srrs cookie->whoTo = alt; 1092163953Srrs atomic_add_int(&alt->ref_count, 1); 1093163953Srrs } 1094163953Srrs /* Now mark the retran info */ 1095163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1096163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1097163953Srrs } 1098163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 1099319407Stuexen cookie->flags |= CHUNK_FLAGS_FRAGMENT_OK; 1100163953Srrs /* 1101163953Srrs * Now call the output routine to kick out the cookie again, Note we 1102163953Srrs * don't mark any chunks for retran so that FR will need to kick in 1103163953Srrs * to move these (or a send timer). 1104163953Srrs */ 1105163953Srrs return (0); 1106163953Srrs} 1107163953Srrs 1108163953Srrsint 1109163953Srrssctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1110163953Srrs struct sctp_nets *net) 1111163953Srrs{ 1112163953Srrs struct sctp_nets *alt; 1113163953Srrs struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1114163953Srrs 1115163953Srrs if (stcb->asoc.stream_reset_outstanding == 0) { 1116163953Srrs return (0); 1117163953Srrs } 1118163953Srrs /* find the existing STRRESET, we use the seq number we sent out on */ 1119169420Srrs (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1120163953Srrs if (strrst == NULL) { 1121163953Srrs return (0); 1122163953Srrs } 1123163953Srrs /* do threshold management */ 1124163953Srrs if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1125163953Srrs stcb->asoc.max_send_times)) { 1126163953Srrs /* Assoc is over */ 1127163953Srrs return (1); 1128163953Srrs } 1129163953Srrs /* 1130299273Stuexen * Cleared threshold management, now lets backoff the address and 1131299273Stuexen * select an alternate 1132163953Srrs */ 1133210599Srrs sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0); 1134163953Srrs alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1135163953Srrs sctp_free_remote_addr(strrst->whoTo); 1136163953Srrs strrst->whoTo = alt; 1137163953Srrs atomic_add_int(&alt->ref_count, 1); 1138163953Srrs 1139163953Srrs /* See if a ECN Echo is also stranded */ 1140163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1141163953Srrs if ((chk->whoTo == net) && 1142163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1143163953Srrs sctp_free_remote_addr(chk->whoTo); 1144163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1145163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1146319407Stuexen chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 1147163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1148163953Srrs } 1149163953Srrs chk->whoTo = alt; 1150163953Srrs atomic_add_int(&alt->ref_count, 1); 1151163953Srrs } 1152163953Srrs } 1153224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1154163953Srrs /* 1155163953Srrs * If the address went un-reachable, we need to move to 1156163953Srrs * alternates for ALL chk's in queue 1157163953Srrs */ 1158212712Stuexen sctp_move_chunks_from_net(stcb, net); 1159163953Srrs } 1160163953Srrs /* mark the retran info */ 1161163953Srrs if (strrst->sent != SCTP_DATAGRAM_RESEND) 1162163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1163163953Srrs strrst->sent = SCTP_DATAGRAM_RESEND; 1164319407Stuexen strrst->flags |= CHUNK_FLAGS_FRAGMENT_OK; 1165163953Srrs 1166163953Srrs /* restart the timer */ 1167163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1168163953Srrs return (0); 1169163953Srrs} 1170163953Srrs 1171163953Srrsint 1172163953Srrssctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1173163953Srrs struct sctp_nets *net) 1174163953Srrs{ 1175163953Srrs struct sctp_nets *alt; 1176216822Stuexen struct sctp_tmit_chunk *asconf, *chk; 1177163953Srrs 1178171572Srrs /* is this a first send, or a retransmission? */ 1179179157Srrs if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1180163953Srrs /* compose a new ASCONF chunk and send it */ 1181172190Srrs sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1182163953Srrs } else { 1183171572Srrs /* 1184171572Srrs * Retransmission of the existing ASCONF is needed 1185171572Srrs */ 1186163953Srrs 1187163953Srrs /* find the existing ASCONF */ 1188179157Srrs asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1189163953Srrs if (asconf == NULL) { 1190163953Srrs return (0); 1191163953Srrs } 1192163953Srrs /* do threshold management */ 1193163953Srrs if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1194163953Srrs stcb->asoc.max_send_times)) { 1195163953Srrs /* Assoc is over */ 1196163953Srrs return (1); 1197163953Srrs } 1198163953Srrs if (asconf->snd_count > stcb->asoc.max_send_times) { 1199163953Srrs /* 1200171572Srrs * Something is rotten: our peer is not responding 1201171572Srrs * to ASCONFs but apparently is to other chunks. 1202171572Srrs * i.e. it is not properly handling the chunk type 1203171572Srrs * upper bits. Mark this peer as ASCONF incapable 1204171572Srrs * and cleanup. 1205163953Srrs */ 1206169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1207163953Srrs sctp_asconf_cleanup(stcb, net); 1208163953Srrs return (0); 1209163953Srrs } 1210163953Srrs /* 1211171572Srrs * cleared threshold management, so now backoff the net and 1212171572Srrs * select an alternate 1213163953Srrs */ 1214210599Srrs sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0); 1215163953Srrs alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1216179157Srrs if (asconf->whoTo != alt) { 1217179157Srrs sctp_free_remote_addr(asconf->whoTo); 1218179157Srrs asconf->whoTo = alt; 1219179157Srrs atomic_add_int(&alt->ref_count, 1); 1220179157Srrs } 1221347154Stuexen 1222171572Srrs /* See if an ECN Echo is also stranded */ 1223163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1224163953Srrs if ((chk->whoTo == net) && 1225163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1226163953Srrs sctp_free_remote_addr(chk->whoTo); 1227163953Srrs chk->whoTo = alt; 1228163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1229163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1230319407Stuexen chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 1231163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1232163953Srrs } 1233163953Srrs atomic_add_int(&alt->ref_count, 1); 1234163953Srrs } 1235163953Srrs } 1236216822Stuexen TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) { 1237179157Srrs if (chk->whoTo != alt) { 1238179157Srrs sctp_free_remote_addr(chk->whoTo); 1239179157Srrs chk->whoTo = alt; 1240179157Srrs atomic_add_int(&alt->ref_count, 1); 1241179157Srrs } 1242179157Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1243179157Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1244179157Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1245319407Stuexen chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 1246179157Srrs } 1247224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1248163953Srrs /* 1249163953Srrs * If the address went un-reachable, we need to move 1250171572Srrs * to the alternate for ALL chunks in queue 1251163953Srrs */ 1252212712Stuexen sctp_move_chunks_from_net(stcb, net); 1253163953Srrs } 1254163953Srrs /* mark the retran info */ 1255163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 1256163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1257163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 1258319407Stuexen asconf->flags |= CHUNK_FLAGS_FRAGMENT_OK; 1259179157Srrs 1260179157Srrs /* send another ASCONF if any and we can do */ 1261179157Srrs sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1262163953Srrs } 1263163953Srrs return (0); 1264163953Srrs} 1265163953Srrs 1266172091Srrs/* Mobility adaptation */ 1267172156Srrsvoid 1268172091Srrssctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1269228653Stuexen struct sctp_nets *net SCTP_UNUSED) 1270172091Srrs{ 1271172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1272172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1273172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1274172156Srrs return; 1275172091Srrs } 1276172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1277172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1278172091Srrs sctp_free_remote_addr(stcb->asoc.deleted_primary); 1279172091Srrs stcb->asoc.deleted_primary = NULL; 1280172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1281172156Srrs return; 1282172091Srrs} 1283172091Srrs 1284163953Srrs/* 1285163953Srrs * For the shutdown and shutdown-ack, we do not keep one around on the 1286163953Srrs * control queue. This means we must generate a new one and call the general 1287163953Srrs * chunk output routine, AFTER having done threshold management. 1288214928Stuexen * It is assumed that net is non-NULL. 1289163953Srrs */ 1290163953Srrsint 1291163953Srrssctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1292163953Srrs struct sctp_nets *net) 1293163953Srrs{ 1294163953Srrs struct sctp_nets *alt; 1295163953Srrs 1296298942Spfg /* first threshold management */ 1297163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1298163953Srrs /* Assoc is over */ 1299163953Srrs return (1); 1300163953Srrs } 1301214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1302163953Srrs /* second select an alternative */ 1303163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1304163953Srrs 1305163953Srrs /* third generate a shutdown into the queue for out net */ 1306214928Stuexen sctp_send_shutdown(stcb, alt); 1307214928Stuexen 1308163953Srrs /* fourth restart timer */ 1309163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1310163953Srrs return (0); 1311163953Srrs} 1312163953Srrs 1313163953Srrsint 1314163953Srrssctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1315163953Srrs struct sctp_nets *net) 1316163953Srrs{ 1317163953Srrs struct sctp_nets *alt; 1318163953Srrs 1319298942Spfg /* first threshold management */ 1320163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1321163953Srrs /* Assoc is over */ 1322163953Srrs return (1); 1323163953Srrs } 1324214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1325163953Srrs /* second select an alternative */ 1326163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1327163953Srrs 1328163953Srrs /* third generate a shutdown into the queue for out net */ 1329163953Srrs sctp_send_shutdown_ack(stcb, alt); 1330163953Srrs 1331163953Srrs /* fourth restart timer */ 1332163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1333163953Srrs return (0); 1334163953Srrs} 1335163953Srrs 1336163953Srrsstatic void 1337163953Srrssctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1338163953Srrs struct sctp_tcb *stcb) 1339163953Srrs{ 1340163953Srrs struct sctp_stream_queue_pending *sp; 1341217760Stuexen unsigned int i, chks_in_queue = 0; 1342163953Srrs int being_filled = 0; 1343163953Srrs 1344163953Srrs /* 1345163953Srrs * This function is ONLY called when the send/sent queues are empty. 1346163953Srrs */ 1347163953Srrs if ((stcb == NULL) || (inp == NULL)) 1348163953Srrs return; 1349163953Srrs 1350163953Srrs if (stcb->asoc.sent_queue_retran_cnt) { 1351169420Srrs SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1352163953Srrs stcb->asoc.sent_queue_retran_cnt); 1353163953Srrs stcb->asoc.sent_queue_retran_cnt = 0; 1354163953Srrs } 1355217760Stuexen if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1356218241Stuexen /* No stream scheduler information, initialize scheduler */ 1357218241Stuexen stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0); 1358218241Stuexen if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1359218241Stuexen /* yep, we lost a stream or two */ 1360218241Stuexen SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n"); 1361163953Srrs } else { 1362218241Stuexen /* no streams lost */ 1363163953Srrs stcb->asoc.total_output_queue_size = 0; 1364163953Srrs } 1365163953Srrs } 1366163953Srrs /* Check to see if some data queued, if so report it */ 1367217760Stuexen for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1368217760Stuexen if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1369217760Stuexen TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 1370163953Srrs if (sp->msg_is_complete) 1371163953Srrs being_filled++; 1372163953Srrs chks_in_queue++; 1373163953Srrs } 1374163953Srrs } 1375163953Srrs } 1376163953Srrs if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1377169420Srrs SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1378163953Srrs stcb->asoc.stream_queue_cnt, chks_in_queue); 1379163953Srrs } 1380163953Srrs if (chks_in_queue) { 1381163953Srrs /* call the output queue function */ 1382172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1383163953Srrs if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1384163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1385163953Srrs /* 1386163953Srrs * Probably should go in and make it go back through 1387163953Srrs * and add fragments allowed 1388163953Srrs */ 1389163953Srrs if (being_filled == 0) { 1390169420Srrs SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1391163953Srrs chks_in_queue); 1392163953Srrs } 1393163953Srrs } 1394163953Srrs } else { 1395169420Srrs SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1396163953Srrs (u_long)stcb->asoc.total_output_queue_size); 1397163953Srrs stcb->asoc.total_output_queue_size = 0; 1398163953Srrs } 1399163953Srrs} 1400163953Srrs 1401163953Srrsint 1402163953Srrssctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1403224641Stuexen struct sctp_nets *net) 1404163953Srrs{ 1405224641Stuexen uint8_t net_was_pf; 1406171440Srrs 1407228907Stuexen if (net->dest_state & SCTP_ADDR_PF) { 1408228907Stuexen net_was_pf = 1; 1409228907Stuexen } else { 1410228907Stuexen net_was_pf = 0; 1411228907Stuexen } 1412228907Stuexen if (net->hb_responded == 0) { 1413228907Stuexen if (net->ro._s_addr) { 1414228907Stuexen /* 1415228907Stuexen * Invalidate the src address if we did not get a 1416228907Stuexen * response last time. 1417228907Stuexen */ 1418228907Stuexen sctp_free_ifa(net->ro._s_addr); 1419228907Stuexen net->ro._s_addr = NULL; 1420228907Stuexen net->src_addr_selected = 0; 1421224641Stuexen } 1422228907Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1423228907Stuexen if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1424228907Stuexen /* Assoc is over */ 1425228907Stuexen return (1); 1426163953Srrs } 1427163953Srrs } 1428228907Stuexen /* Zero PBA, if it needs it */ 1429228907Stuexen if (net->partial_bytes_acked) { 1430228907Stuexen net->partial_bytes_acked = 0; 1431228907Stuexen } 1432163953Srrs if ((stcb->asoc.total_output_queue_size > 0) && 1433163953Srrs (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1434163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1435163953Srrs sctp_audit_stream_queues_for_size(inp, stcb); 1436163953Srrs } 1437224641Stuexen if (!(net->dest_state & SCTP_ADDR_NOHB) && 1438224641Stuexen !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) { 1439163953Srrs /* 1440224641Stuexen * when move to PF during threshold mangement, a HB has been 1441224641Stuexen * queued in that routine 1442163953Srrs */ 1443234296Stuexen uint32_t ms_gone_by; 1444234296Stuexen 1445234296Stuexen if ((net->last_sent_time.tv_sec > 0) || 1446234296Stuexen (net->last_sent_time.tv_usec > 0)) { 1447234296Stuexen struct timeval diff; 1448234296Stuexen 1449234296Stuexen SCTP_GETTIME_TIMEVAL(&diff); 1450234296Stuexen timevalsub(&diff, &net->last_sent_time); 1451310773Stuexen ms_gone_by = (uint32_t)(diff.tv_sec * 1000) + 1452310773Stuexen (uint32_t)(diff.tv_usec / 1000); 1453234296Stuexen } else { 1454234296Stuexen ms_gone_by = 0xffffffff; 1455234296Stuexen } 1456234297Stuexen if ((ms_gone_by >= net->heart_beat_delay) || 1457234297Stuexen (net->dest_state & SCTP_ADDR_PF)) { 1458234296Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 1459234296Stuexen } 1460163953Srrs } 1461163953Srrs return (0); 1462163953Srrs} 1463163953Srrs 1464163953Srrsvoid 1465163953Srrssctp_pathmtu_timer(struct sctp_inpcb *inp, 1466163953Srrs struct sctp_tcb *stcb, 1467163953Srrs struct sctp_nets *net) 1468163953Srrs{ 1469179157Srrs uint32_t next_mtu, mtu; 1470163953Srrs 1471228653Stuexen next_mtu = sctp_get_next_mtu(net->mtu); 1472169352Srrs 1473179157Srrs if ((next_mtu > net->mtu) && (net->port == 0)) { 1474169352Srrs if ((net->src_addr_selected == 0) || 1475169352Srrs (net->ro._s_addr == NULL) || 1476169352Srrs (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1477169420Srrs if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1478169352Srrs sctp_free_ifa(net->ro._s_addr); 1479169352Srrs net->ro._s_addr = NULL; 1480169352Srrs net->src_addr_selected = 0; 1481169420Srrs } else if (net->ro._s_addr == NULL) { 1482179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1483179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1484179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1485179157Srrs 1486179157Srrs /* KAME hack: embed scopeid */ 1487197288Srrs (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 1488179157Srrs } 1489179157Srrs#endif 1490179157Srrs 1491169420Srrs net->ro._s_addr = sctp_source_address_selection(inp, 1492169420Srrs stcb, 1493310773Stuexen (sctp_route_t *)&net->ro, 1494169420Srrs net, 0, stcb->asoc.vrf_id); 1495179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1496179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1497179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1498179157Srrs 1499179157Srrs (void)sa6_recoverscope(sin6); 1500179157Srrs } 1501179157Srrs#endif /* INET6 */ 1502169352Srrs } 1503169352Srrs if (net->ro._s_addr) 1504169352Srrs net->src_addr_selected = 1; 1505169352Srrs } 1506169352Srrs if (net->ro._s_addr) { 1507169352Srrs mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); 1508268526Stuexen#if defined(INET) || defined(INET6) 1509185694Srrs if (net->port) { 1510185694Srrs mtu -= sizeof(struct udphdr); 1511185694Srrs } 1512268526Stuexen#endif 1513169352Srrs if (mtu > next_mtu) { 1514163953Srrs net->mtu = next_mtu; 1515286781Stuexen } else { 1516286781Stuexen net->mtu = mtu; 1517163953Srrs } 1518163953Srrs } 1519163953Srrs } 1520163953Srrs /* restart the timer */ 1521163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 1522163953Srrs} 1523163953Srrs 1524163953Srrsvoid 1525163953Srrssctp_autoclose_timer(struct sctp_inpcb *inp, 1526163953Srrs struct sctp_tcb *stcb, 1527163953Srrs struct sctp_nets *net) 1528163953Srrs{ 1529163953Srrs struct timeval tn, *tim_touse; 1530163953Srrs struct sctp_association *asoc; 1531163953Srrs int ticks_gone_by; 1532163953Srrs 1533169378Srrs (void)SCTP_GETTIME_TIMEVAL(&tn); 1534163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1535163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1536163953Srrs /* Auto close is on */ 1537163953Srrs asoc = &stcb->asoc; 1538163953Srrs /* pick the time to use */ 1539163953Srrs if (asoc->time_last_rcvd.tv_sec > 1540163953Srrs asoc->time_last_sent.tv_sec) { 1541163953Srrs tim_touse = &asoc->time_last_rcvd; 1542163953Srrs } else { 1543163953Srrs tim_touse = &asoc->time_last_sent; 1544163953Srrs } 1545163953Srrs /* Now has long enough transpired to autoclose? */ 1546163953Srrs ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec); 1547163953Srrs if ((ticks_gone_by > 0) && 1548163953Srrs (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) { 1549163953Srrs /* 1550163953Srrs * autoclose time has hit, call the output routine, 1551163953Srrs * which should do nothing just to be SURE we don't 1552163953Srrs * have hanging data. We can then safely check the 1553163953Srrs * queues and know that we are clear to send 1554163953Srrs * shutdown 1555163953Srrs */ 1556172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); 1557163953Srrs /* Are we clean? */ 1558163953Srrs if (TAILQ_EMPTY(&asoc->send_queue) && 1559163953Srrs TAILQ_EMPTY(&asoc->sent_queue)) { 1560163953Srrs /* 1561163953Srrs * there is nothing queued to send, so I'm 1562163953Srrs * done... 1563163953Srrs */ 1564347165Stuexen if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) { 1565163953Srrs /* only send SHUTDOWN 1st time thru */ 1566224641Stuexen struct sctp_nets *netp; 1567224641Stuexen 1568347165Stuexen if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || 1569347165Stuexen (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 1570246588Stuexen SCTP_STAT_DECR_GAUGE32(sctps_currestab); 1571246588Stuexen } 1572347165Stuexen SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); 1573347165Stuexen SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); 1574246588Stuexen sctp_stop_timers_for_shutdown(stcb); 1575224641Stuexen if (stcb->asoc.alternate) { 1576224641Stuexen netp = stcb->asoc.alternate; 1577224641Stuexen } else { 1578224641Stuexen netp = stcb->asoc.primary_destination; 1579224641Stuexen } 1580224641Stuexen sctp_send_shutdown(stcb, netp); 1581163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 1582163953Srrs stcb->sctp_ep, stcb, 1583224641Stuexen netp); 1584163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1585163953Srrs stcb->sctp_ep, stcb, 1586224641Stuexen netp); 1587163953Srrs } 1588163953Srrs } 1589163953Srrs } else { 1590163953Srrs /* 1591163953Srrs * No auto close at this time, reset t-o to check 1592163953Srrs * later 1593163953Srrs */ 1594163953Srrs int tmp; 1595163953Srrs 1596163953Srrs /* fool the timer startup to use the time left */ 1597163953Srrs tmp = asoc->sctp_autoclose_ticks; 1598163953Srrs asoc->sctp_autoclose_ticks -= ticks_gone_by; 1599163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1600163953Srrs net); 1601163953Srrs /* restore the real tick value */ 1602163953Srrs asoc->sctp_autoclose_ticks = tmp; 1603163953Srrs } 1604163953Srrs } 1605163953Srrs} 1606