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: releng/10.2/sys/netinet/sctp_timer.c 283822 2015-05-31 12:46:40Z 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> 52270350Stuexen#if defined(INET) || defined(INET6) 53185694Srrs#include <netinet/udp.h> 54270350Stuexen#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 88163953Srrsint 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); 113283822Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, 114283822Stuexen stcb->sctp_ep, stcb, net, 115283822Stuexen SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); 116224641Stuexen sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, 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, 146169420Srrs (uint32_t) threshold, 147169420Srrs ((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 */ 154267723Stuexen struct mbuf *op_err; 155163953Srrs 156267723Stuexen op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, 157283723Stuexen "Association error counter exceeded"); 158283822Stuexen inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_2; 159267723Stuexen 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) { 196171440Srrs /* 197171440Srrs * JRS 5/14/07 - If the destination is unreachable 198171440Srrs * or unconfirmed, skip it. 199171440Srrs */ 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 } 289171440Srrs } 290171440Srrs /* 291171440Srrs * JRS 5/14/07 - If mode is set to 1, use the CMT policy for 292171440Srrs * choosing an alternate net. 293171440Srrs */ 294171440Srrs else if (mode == 1) { 295171440Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 296171440Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 297214928Stuexen (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 298163953Srrs /* 299163953Srrs * will skip ones that are not-reachable or 300163953Srrs * unconfirmed 301163953Srrs */ 302163953Srrs continue; 303163953Srrs } 304171440Srrs if (max_cwnd < mnet->cwnd) { 305171440Srrs max_cwnd_net = mnet; 306171440Srrs max_cwnd = mnet->cwnd; 307171440Srrs } else if (max_cwnd == mnet->cwnd) { 308163953Srrs uint32_t rndval; 309163953Srrs uint8_t this_random; 310163953Srrs 311163953Srrs if (stcb->asoc.hb_random_idx > 3) { 312163953Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 313163953Srrs memcpy(stcb->asoc.hb_random_values, &rndval, 314163953Srrs sizeof(stcb->asoc.hb_random_values)); 315163953Srrs this_random = stcb->asoc.hb_random_values[0]; 316163953Srrs stcb->asoc.hb_random_idx = 0; 317163953Srrs stcb->asoc.hb_ect_randombit = 0; 318163953Srrs } else { 319163953Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 320163953Srrs stcb->asoc.hb_random_idx++; 321163953Srrs stcb->asoc.hb_ect_randombit = 0; 322163953Srrs } 323163953Srrs if (this_random % 2) { 324171440Srrs max_cwnd_net = mnet; 325171440Srrs max_cwnd = mnet->cwnd; 326163953Srrs } 327163953Srrs } 328163953Srrs } 329171440Srrs if (max_cwnd_net) { 330171440Srrs return (max_cwnd_net); 331163953Srrs } 332163953Srrs } 333163953Srrs mnet = net; 334163953Srrs once = 0; 335163953Srrs 336163953Srrs if (mnet == NULL) { 337163953Srrs mnet = TAILQ_FIRST(&stcb->asoc.nets); 338212225Srrs if (mnet == NULL) { 339212225Srrs return (NULL); 340212225Srrs } 341163953Srrs } 342283720Stuexen for (;;) { 343163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 344163953Srrs if (alt == NULL) { 345163953Srrs once++; 346163953Srrs if (once > 1) { 347163953Srrs break; 348163953Srrs } 349163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 350212225Srrs if (alt == NULL) { 351212225Srrs return (NULL); 352212225Srrs } 353163953Srrs } 354163953Srrs if (alt->ro.ro_rt == NULL) { 355167598Srrs if (alt->ro._s_addr) { 356167598Srrs sctp_free_ifa(alt->ro._s_addr); 357167598Srrs alt->ro._s_addr = NULL; 358167598Srrs } 359163953Srrs alt->src_addr_selected = 0; 360163953Srrs } 361214928Stuexen if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && 362163953Srrs (alt->ro.ro_rt != NULL) && 363214928Stuexen (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) { 364163953Srrs /* Found a reachable address */ 365163953Srrs break; 366163953Srrs } 367163953Srrs mnet = alt; 368283720Stuexen } 369163953Srrs 370163953Srrs if (alt == NULL) { 371163953Srrs /* Case where NO insv network exists (dormant state) */ 372163953Srrs /* we rotate destinations */ 373163953Srrs once = 0; 374163953Srrs mnet = net; 375283720Stuexen for (;;) { 376212225Srrs if (mnet == NULL) { 377212225Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 378212225Srrs } 379163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 380163953Srrs if (alt == NULL) { 381163953Srrs once++; 382163953Srrs if (once > 1) { 383163953Srrs break; 384163953Srrs } 385163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 386283720Stuexen if (alt == NULL) { 387283720Stuexen break; 388283720Stuexen } 389163953Srrs } 390163953Srrs if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) && 391163953Srrs (alt != net)) { 392163953Srrs /* Found an alternate address */ 393163953Srrs break; 394163953Srrs } 395163953Srrs mnet = alt; 396283720Stuexen } 397163953Srrs } 398163953Srrs if (alt == NULL) { 399163953Srrs return (net); 400163953Srrs } 401163953Srrs return (alt); 402163953Srrs} 403163953Srrs 404163953Srrsstatic void 405163953Srrssctp_backoff_on_timeout(struct sctp_tcb *stcb, 406163953Srrs struct sctp_nets *net, 407163953Srrs int win_probe, 408210599Srrs int num_marked, int num_abandoned) 409163953Srrs{ 410170642Srrs if (net->RTO == 0) { 411170642Srrs net->RTO = stcb->asoc.minrto; 412170642Srrs } 413163953Srrs net->RTO <<= 1; 414163953Srrs if (net->RTO > stcb->asoc.maxrto) { 415163953Srrs net->RTO = stcb->asoc.maxrto; 416163953Srrs } 417210599Srrs if ((win_probe == 0) && (num_marked || num_abandoned)) { 418163953Srrs /* We don't apply penalty to window probe scenarios */ 419171440Srrs /* JRS - Use the congestion control given in the CC module */ 420171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 421163953Srrs } 422163953Srrs} 423163953Srrs 424184333Srrs#ifndef INVARIANTS 425184333Srrsstatic void 426182367Srrssctp_recover_sent_list(struct sctp_tcb *stcb) 427182367Srrs{ 428216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 429182367Srrs struct sctp_association *asoc; 430182367Srrs 431182367Srrs asoc = &stcb->asoc; 432216822Stuexen TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 433216825Stuexen if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) { 434182367Srrs SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", 435240148Stuexen (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq); 436243157Stuexen if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 437242714Stuexen if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 438242714Stuexen asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 439242714Stuexen } 440242714Stuexen } 441182367Srrs TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 442255190Stuexen if (PR_SCTP_ENABLED(chk->flags)) { 443182367Srrs if (asoc->pr_sctp_cnt != 0) 444182367Srrs asoc->pr_sctp_cnt--; 445182367Srrs } 446182367Srrs if (chk->data) { 447182367Srrs /* sa_ignore NO_NULL_CHK */ 448182367Srrs sctp_free_bufspace(stcb, asoc, chk, 1); 449182367Srrs sctp_m_freem(chk->data); 450216822Stuexen chk->data = NULL; 451270357Stuexen if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) { 452182367Srrs asoc->sent_queue_cnt_removeable--; 453182367Srrs } 454182367Srrs } 455182367Srrs asoc->sent_queue_cnt--; 456221627Stuexen sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 457182367Srrs } 458182367Srrs } 459182367Srrs SCTP_PRINTF("after recover order is as follows\n"); 460216822Stuexen TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 461240148Stuexen SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq); 462182367Srrs } 463182367Srrs} 464182367Srrs 465184333Srrs#endif 466184333Srrs 467163953Srrsstatic int 468163953Srrssctp_mark_all_for_resend(struct sctp_tcb *stcb, 469163953Srrs struct sctp_nets *net, 470163953Srrs struct sctp_nets *alt, 471163953Srrs int window_probe, 472210599Srrs int *num_marked, 473210599Srrs int *num_abandoned) 474163953Srrs{ 475163953Srrs 476163953Srrs /* 477163953Srrs * Mark all chunks (well not all) that were sent to *net for 478163953Srrs * retransmission. Move them to alt for there destination as well... 479163953Srrs * We only mark chunks that have been outstanding long enough to 480163953Srrs * have received feed-back. 481163953Srrs */ 482216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 483163953Srrs struct sctp_nets *lnets; 484163953Srrs struct timeval now, min_wait, tv; 485219014Stuexen int cur_rto; 486210599Srrs int cnt_abandoned; 487168709Srrs int audit_tf, num_mk, fir; 488163953Srrs unsigned int cnt_mk; 489168709Srrs uint32_t orig_flight, orig_tf; 490163953Srrs uint32_t tsnlast, tsnfirst; 491182367Srrs int recovery_cnt = 0; 492163953Srrs 493171440Srrs 494163953Srrs /* none in flight now */ 495163953Srrs audit_tf = 0; 496163953Srrs fir = 0; 497163953Srrs /* 498163953Srrs * figure out how long a data chunk must be pending before we can 499163953Srrs * mark it .. 500163953Srrs */ 501169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 502163953Srrs /* get cur rto in micro-seconds */ 503219014Stuexen cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; 504219014Stuexen cur_rto *= 1000; 505224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 506219014Stuexen sctp_log_fr(cur_rto, 507170744Srrs stcb->asoc.peers_rwnd, 508170744Srrs window_probe, 509170744Srrs SCTP_FR_T3_MARK_TIME); 510224641Stuexen sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT); 511170744Srrs sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 512170744Srrs } 513219014Stuexen tv.tv_sec = cur_rto / 1000000; 514219014Stuexen tv.tv_usec = cur_rto % 1000000; 515163953Srrs min_wait = now; 516163953Srrs timevalsub(&min_wait, &tv); 517163953Srrs if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 518163953Srrs /* 519163953Srrs * if we hit here, we don't have enough seconds on the clock 520163953Srrs * to account for the RTO. We just let the lower seconds be 521163953Srrs * the bounds and don't worry about it. This may mean we 522163953Srrs * will mark a lot more than we should. 523163953Srrs */ 524163953Srrs min_wait.tv_sec = min_wait.tv_usec = 0; 525163953Srrs } 526224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 527219014Stuexen sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 528170744Srrs sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 529170744Srrs } 530163953Srrs /* 531163953Srrs * Our rwnd will be incorrect here since we are not adding back the 532163953Srrs * cnt * mbuf but we will fix that down below. 533163953Srrs */ 534163953Srrs orig_flight = net->flight_size; 535168709Srrs orig_tf = stcb->asoc.total_flight; 536168709Srrs 537163953Srrs net->fast_retran_ip = 0; 538163953Srrs /* Now on to each chunk */ 539210599Srrs cnt_abandoned = 0; 540163953Srrs num_mk = cnt_mk = 0; 541163953Srrs tsnfirst = tsnlast = 0; 542184333Srrs#ifndef INVARIANTS 543182367Srrsstart_again: 544184333Srrs#endif 545216822Stuexen TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) { 546216825Stuexen if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) { 547163953Srrs /* Strange case our list got out of order? */ 548258454Stuexen SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n", 549182367Srrs (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq); 550182367Srrs recovery_cnt++; 551182367Srrs#ifdef INVARIANTS 552182367Srrs panic("last acked >= chk on sent-Q"); 553182367Srrs#else 554182367Srrs SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); 555182367Srrs sctp_recover_sent_list(stcb); 556182367Srrs if (recovery_cnt < 10) { 557182367Srrs goto start_again; 558182367Srrs } else { 559182367Srrs SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); 560182367Srrs } 561182367Srrs#endif 562163953Srrs } 563163953Srrs if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 564163953Srrs /* 565163953Srrs * found one to mark: If it is less than 566163953Srrs * DATAGRAM_ACKED it MUST not be a skipped or marked 567163953Srrs * TSN but instead one that is either already set 568163953Srrs * for retransmission OR one that needs 569163953Srrs * retransmission. 570163953Srrs */ 571163953Srrs 572163953Srrs /* validate its been outstanding long enough */ 573224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 574170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, 575170744Srrs chk->sent_rcv_time.tv_sec, 576170744Srrs chk->sent_rcv_time.tv_usec, 577170744Srrs SCTP_FR_T3_MARK_TIME); 578170744Srrs } 579163953Srrs if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 580163953Srrs /* 581163953Srrs * we have reached a chunk that was sent 582163953Srrs * some seconds past our min.. forget it we 583163953Srrs * will find no more to send. 584163953Srrs */ 585224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 586170744Srrs sctp_log_fr(0, 587170744Srrs chk->sent_rcv_time.tv_sec, 588170744Srrs chk->sent_rcv_time.tv_usec, 589170744Srrs SCTP_FR_T3_STOPPED); 590170744Srrs } 591163953Srrs continue; 592163953Srrs } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 593163953Srrs (window_probe == 0)) { 594163953Srrs /* 595163953Srrs * we must look at the micro seconds to 596163953Srrs * know. 597163953Srrs */ 598163953Srrs if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 599163953Srrs /* 600163953Srrs * ok it was sent after our boundary 601163953Srrs * time. 602163953Srrs */ 603163953Srrs continue; 604163953Srrs } 605163953Srrs } 606270357Stuexen if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) { 607163953Srrs /* Is it expired? */ 608212801Stuexen if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { 609163953Srrs /* Yes so drop it */ 610163953Srrs if (chk->data) { 611169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 612163953Srrs chk, 613235416Stuexen 1, 614189790Srrs SCTP_SO_NOT_LOCKED); 615210599Srrs cnt_abandoned++; 616163953Srrs } 617185694Srrs continue; 618163953Srrs } 619163953Srrs } 620270357Stuexen if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) { 621163953Srrs /* Has it been retransmitted tv_sec times? */ 622163953Srrs if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 623163953Srrs if (chk->data) { 624169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 625163953Srrs chk, 626235416Stuexen 1, 627189790Srrs SCTP_SO_NOT_LOCKED); 628210599Srrs cnt_abandoned++; 629163953Srrs } 630185694Srrs continue; 631163953Srrs } 632163953Srrs } 633168709Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 634163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 635163953Srrs num_mk++; 636163953Srrs if (fir == 0) { 637163953Srrs fir = 1; 638163953Srrs tsnfirst = chk->rec.data.TSN_seq; 639163953Srrs } 640163953Srrs tsnlast = chk->rec.data.TSN_seq; 641224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 642170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 643170744Srrs 0, SCTP_FR_T3_MARKED); 644170744Srrs } 645168709Srrs if (chk->rec.data.chunk_was_revoked) { 646168709Srrs /* deflate the cwnd */ 647168709Srrs chk->whoTo->cwnd -= chk->book_size; 648168709Srrs chk->rec.data.chunk_was_revoked = 0; 649168709Srrs } 650168709Srrs net->marked_retrans++; 651168709Srrs stcb->asoc.marked_retrans++; 652179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 653170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 654170744Srrs chk->whoTo->flight_size, 655170744Srrs chk->book_size, 656170744Srrs (uintptr_t) chk->whoTo, 657170744Srrs chk->rec.data.TSN_seq); 658170744Srrs } 659168709Srrs sctp_flight_size_decrease(chk); 660168709Srrs sctp_total_flight_decrease(stcb, chk); 661168709Srrs stcb->asoc.peers_rwnd += chk->send_size; 662179783Srrs stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 663163953Srrs } 664163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 665163953Srrs SCTP_STAT_INCR(sctps_markedretrans); 666165220Srrs 667163953Srrs /* reset the TSN for striking and other FR stuff */ 668163953Srrs chk->rec.data.doing_fast_retransmit = 0; 669163953Srrs /* Clear any time so NO RTT is being done */ 670219397Srrs 671219397Srrs if (chk->do_rtt) { 672219397Srrs if (chk->whoTo->rto_needed == 0) { 673219397Srrs chk->whoTo->rto_needed = 1; 674219397Srrs } 675219397Srrs } 676163953Srrs chk->do_rtt = 0; 677163953Srrs if (alt != net) { 678163953Srrs sctp_free_remote_addr(chk->whoTo); 679163953Srrs chk->no_fr_allowed = 1; 680163953Srrs chk->whoTo = alt; 681163953Srrs atomic_add_int(&alt->ref_count, 1); 682163953Srrs } else { 683163953Srrs chk->no_fr_allowed = 0; 684163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 685163953Srrs chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 686163953Srrs } else { 687163953Srrs chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 688163953Srrs } 689163953Srrs } 690170181Srrs /* 691170181Srrs * CMT: Do not allow FRs on retransmitted TSNs. 692170181Srrs */ 693216669Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 694163953Srrs chk->no_fr_allowed = 1; 695163953Srrs } 696210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 697163953Srrs } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 698163953Srrs /* remember highest acked one */ 699163953Srrs could_be_sent = chk; 700210599Srrs#endif 701163953Srrs } 702163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 703163953Srrs cnt_mk++; 704163953Srrs } 705163953Srrs } 706168709Srrs if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 707168709Srrs /* we did not subtract the same things? */ 708168709Srrs audit_tf = 1; 709168709Srrs } 710224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 711170744Srrs sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 712170744Srrs } 713163953Srrs#ifdef SCTP_DEBUG 714169420Srrs if (num_mk) { 715169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 716169420Srrs tsnlast); 717169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n", 718169420Srrs num_mk, (u_long)stcb->asoc.peers_rwnd); 719169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 720169420Srrs tsnlast); 721169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n", 722169420Srrs num_mk, 723169420Srrs (int)stcb->asoc.peers_rwnd); 724163953Srrs } 725163953Srrs#endif 726163953Srrs *num_marked = num_mk; 727210599Srrs *num_abandoned = cnt_abandoned; 728210493Srrs /* 729210493Srrs * Now check for a ECN Echo that may be stranded And include the 730210493Srrs * cnt_mk'd to have all resends in the control queue. 731210493Srrs */ 732210493Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 733210493Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 734210493Srrs cnt_mk++; 735210493Srrs } 736210493Srrs if ((chk->whoTo == net) && 737210493Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 738210493Srrs sctp_free_remote_addr(chk->whoTo); 739210493Srrs chk->whoTo = alt; 740210493Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 741210493Srrs chk->sent = SCTP_DATAGRAM_RESEND; 742210493Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 743210493Srrs cnt_mk++; 744210493Srrs } 745210493Srrs atomic_add_int(&alt->ref_count, 1); 746210493Srrs } 747210493Srrs } 748210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 749163953Srrs if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 750163953Srrs /* fix it so we retransmit the highest acked anyway */ 751163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 752163953Srrs cnt_mk++; 753163953Srrs could_be_sent->sent = SCTP_DATAGRAM_RESEND; 754163953Srrs } 755210599Srrs#endif 756163953Srrs if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 757165220Srrs#ifdef INVARIANTS 758171477Srrs SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 759171477Srrs cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 760163953Srrs#endif 761163953Srrs#ifndef SCTP_AUDITING_ENABLED 762163953Srrs stcb->asoc.sent_queue_retran_cnt = cnt_mk; 763163953Srrs#endif 764163953Srrs } 765163953Srrs if (audit_tf) { 766169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 767169420Srrs "Audit total flight due to negative value net:%p\n", 768240148Stuexen (void *)net); 769163953Srrs stcb->asoc.total_flight = 0; 770163953Srrs stcb->asoc.total_flight_count = 0; 771163953Srrs /* Clear all networks flight size */ 772163953Srrs TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 773163953Srrs lnets->flight_size = 0; 774169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 775169420Srrs "Net:%p c-f cwnd:%d ssthresh:%d\n", 776240148Stuexen (void *)lnets, lnets->cwnd, lnets->ssthresh); 777163953Srrs } 778163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 779163953Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 780179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 781170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 782170744Srrs chk->whoTo->flight_size, 783170744Srrs chk->book_size, 784170744Srrs (uintptr_t) chk->whoTo, 785170744Srrs chk->rec.data.TSN_seq); 786170744Srrs } 787168709Srrs sctp_flight_size_increase(chk); 788168709Srrs sctp_total_flight_increase(stcb, chk); 789163953Srrs } 790163953Srrs } 791163953Srrs } 792163953Srrs /* We return 1 if we only have a window probe outstanding */ 793163953Srrs return (0); 794163953Srrs} 795163953Srrs 796163953Srrs 797163953Srrsint 798163953Srrssctp_t3rxt_timer(struct sctp_inpcb *inp, 799163953Srrs struct sctp_tcb *stcb, 800163953Srrs struct sctp_nets *net) 801163953Srrs{ 802163953Srrs struct sctp_nets *alt; 803210599Srrs int win_probe, num_mk, num_abandoned; 804163953Srrs 805179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 806170744Srrs sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 807170744Srrs } 808179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 809163953Srrs struct sctp_nets *lnet; 810163953Srrs 811163953Srrs TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 812163953Srrs if (net == lnet) { 813163953Srrs sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 814163953Srrs } else { 815163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 816163953Srrs } 817163953Srrs } 818163953Srrs } 819163953Srrs /* Find an alternate and mark those for retransmission */ 820163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 821163953Srrs (stcb->asoc.total_flight < net->mtu)) { 822163953Srrs SCTP_STAT_INCR(sctps_timowindowprobe); 823163953Srrs win_probe = 1; 824163953Srrs } else { 825163953Srrs win_probe = 0; 826163953Srrs } 827168709Srrs 828163953Srrs if (win_probe == 0) { 829163953Srrs /* We don't do normal threshold management on window probes */ 830163953Srrs if (sctp_threshold_management(inp, stcb, net, 831163953Srrs stcb->asoc.max_send_times)) { 832163953Srrs /* Association was destroyed */ 833163953Srrs return (1); 834163953Srrs } else { 835163953Srrs if (net != stcb->asoc.primary_destination) { 836163953Srrs /* send a immediate HB if our RTO is stale */ 837163953Srrs struct timeval now; 838163953Srrs unsigned int ms_goneby; 839163953Srrs 840169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 841163953Srrs if (net->last_sent_time.tv_sec) { 842163953Srrs ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 843163953Srrs } else { 844163953Srrs ms_goneby = 0; 845163953Srrs } 846224641Stuexen if ((net->dest_state & SCTP_ADDR_PF) == 0) { 847224641Stuexen if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 848185694Srrs /* 849224641Stuexen * no recent feed back in an 850224641Stuexen * RTO or more, request a 851224641Stuexen * RTT update 852185694Srrs */ 853224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 854224641Stuexen } 855163953Srrs } 856163953Srrs } 857163953Srrs } 858163953Srrs } else { 859163953Srrs /* 860163953Srrs * For a window probe we don't penalize the net's but only 861163953Srrs * the association. This may fail it if SACKs are not coming 862163953Srrs * back. If sack's are coming with rwnd locked at 0, we will 863163953Srrs * continue to hold things waiting for rwnd to raise 864163953Srrs */ 865163953Srrs if (sctp_threshold_management(inp, stcb, NULL, 866163953Srrs stcb->asoc.max_send_times)) { 867163953Srrs /* Association was destroyed */ 868163953Srrs return (1); 869163953Srrs } 870163953Srrs } 871224641Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 872224641Stuexen if (net->pf_threshold < net->failure_threshold) { 873224641Stuexen alt = sctp_find_alternate_net(stcb, net, 2); 874224641Stuexen } else { 875224641Stuexen /* 876224641Stuexen * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is 877224641Stuexen * being used, then pick dest with largest ssthresh 878224641Stuexen * for any retransmission. 879224641Stuexen */ 880224641Stuexen alt = sctp_find_alternate_net(stcb, net, 1); 881224641Stuexen /* 882224641Stuexen * CUCv2: If a different dest is picked for the 883224641Stuexen * retransmission, then new (rtx-)pseudo_cumack 884224641Stuexen * needs to be tracked for orig dest. Let CUCv2 885224641Stuexen * track new (rtx-) pseudo-cumack always. 886224641Stuexen */ 887224641Stuexen net->find_pseudo_cumack = 1; 888224641Stuexen net->find_rtx_pseudo_cumack = 1; 889224641Stuexen } 890224641Stuexen } else { 891224641Stuexen alt = sctp_find_alternate_net(stcb, net, 0); 892224641Stuexen } 893224641Stuexen 894224641Stuexen num_mk = 0; 895224641Stuexen num_abandoned = 0; 896224641Stuexen (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, 897224641Stuexen &num_mk, &num_abandoned); 898224641Stuexen /* FR Loss recovery just ended with the T3. */ 899224641Stuexen stcb->asoc.fast_retran_loss_recovery = 0; 900224641Stuexen 901224641Stuexen /* CMT FR loss recovery ended with the T3 */ 902224641Stuexen net->fast_retran_loss_recovery = 0; 903224641Stuexen if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 904224641Stuexen (net->flight_size == 0)) { 905224641Stuexen (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 906224641Stuexen } 907224641Stuexen /* 908224641Stuexen * setup the sat loss recovery that prevents satellite cwnd advance. 909224641Stuexen */ 910224641Stuexen stcb->asoc.sat_t3_loss_recovery = 1; 911224641Stuexen stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 912224641Stuexen 913224641Stuexen /* Backoff the timer and cwnd */ 914224641Stuexen sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); 915224641Stuexen if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) || 916224641Stuexen (net->dest_state & SCTP_ADDR_PF)) { 917163953Srrs /* Move all pending over too */ 918212712Stuexen sctp_move_chunks_from_net(stcb, net); 919169352Srrs 920169352Srrs /* 921169352Srrs * Get the address that failed, to force a new src address 922169352Srrs * selecton and a route allocation. 923169352Srrs */ 924169352Srrs if (net->ro._s_addr) { 925169352Srrs sctp_free_ifa(net->ro._s_addr); 926169352Srrs net->ro._s_addr = NULL; 927169352Srrs } 928169352Srrs net->src_addr_selected = 0; 929169352Srrs 930169352Srrs /* Force a route allocation too */ 931169352Srrs if (net->ro.ro_rt) { 932169352Srrs RTFREE(net->ro.ro_rt); 933169352Srrs net->ro.ro_rt = NULL; 934169352Srrs } 935163953Srrs /* Was it our primary? */ 936163953Srrs if ((stcb->asoc.primary_destination == net) && (alt != net)) { 937163953Srrs /* 938163953Srrs * Yes, note it as such and find an alternate note: 939163953Srrs * this means HB code must use this to resent the 940163953Srrs * primary if it goes active AND if someone does a 941163953Srrs * change-primary then this flag must be cleared 942163953Srrs * from any net structures. 943163953Srrs */ 944224641Stuexen if (stcb->asoc.alternate) { 945224641Stuexen sctp_free_remote_addr(stcb->asoc.alternate); 946163953Srrs } 947224641Stuexen stcb->asoc.alternate = alt; 948224641Stuexen atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 949163953Srrs } 950163953Srrs } 951163953Srrs /* 952163953Srrs * Special case for cookie-echo'ed case, we don't do output but must 953163953Srrs * await the COOKIE-ACK before retransmission 954163953Srrs */ 955163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 956163953Srrs /* 957163953Srrs * Here we just reset the timer and start again since we 958163953Srrs * have not established the asoc 959163953Srrs */ 960163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 961163953Srrs return (0); 962163953Srrs } 963270357Stuexen if (stcb->asoc.prsctp_supported) { 964163953Srrs struct sctp_tmit_chunk *lchk; 965163953Srrs 966163953Srrs lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 967163953Srrs /* C3. See if we need to send a Fwd-TSN */ 968216825Stuexen if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { 969163953Srrs send_forward_tsn(stcb, &stcb->asoc); 970163953Srrs if (lchk) { 971163953Srrs /* Assure a timer is up */ 972163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 973163953Srrs } 974163953Srrs } 975163953Srrs } 976179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 977170744Srrs sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 978170744Srrs } 979163953Srrs return (0); 980163953Srrs} 981163953Srrs 982163953Srrsint 983163953Srrssctp_t1init_timer(struct sctp_inpcb *inp, 984163953Srrs struct sctp_tcb *stcb, 985163953Srrs struct sctp_nets *net) 986163953Srrs{ 987163953Srrs /* bump the thresholds */ 988163953Srrs if (stcb->asoc.delayed_connection) { 989163953Srrs /* 990163953Srrs * special hook for delayed connection. The library did NOT 991163953Srrs * complete the rest of its sends. 992163953Srrs */ 993163953Srrs stcb->asoc.delayed_connection = 0; 994172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 995163953Srrs return (0); 996163953Srrs } 997163953Srrs if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) { 998163953Srrs return (0); 999163953Srrs } 1000163953Srrs if (sctp_threshold_management(inp, stcb, net, 1001163953Srrs stcb->asoc.max_init_times)) { 1002163953Srrs /* Association was destroyed */ 1003163953Srrs return (1); 1004163953Srrs } 1005163953Srrs stcb->asoc.dropped_special_cnt = 0; 1006210599Srrs sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); 1007163953Srrs if (stcb->asoc.initial_init_rto_max < net->RTO) { 1008163953Srrs net->RTO = stcb->asoc.initial_init_rto_max; 1009163953Srrs } 1010163953Srrs if (stcb->asoc.numnets > 1) { 1011163953Srrs /* If we have more than one addr use it */ 1012163953Srrs struct sctp_nets *alt; 1013163953Srrs 1014163953Srrs alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1015214928Stuexen if (alt != stcb->asoc.primary_destination) { 1016212712Stuexen sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); 1017163953Srrs stcb->asoc.primary_destination = alt; 1018163953Srrs } 1019163953Srrs } 1020163953Srrs /* Send out a new init */ 1021172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1022163953Srrs return (0); 1023163953Srrs} 1024163953Srrs 1025163953Srrs/* 1026163953Srrs * For cookie and asconf we actually need to find and mark for resend, then 1027163953Srrs * increment the resend counter (after all the threshold management stuff of 1028163953Srrs * course). 1029163953Srrs */ 1030163953Srrsint 1031163953Srrssctp_cookie_timer(struct sctp_inpcb *inp, 1032163953Srrs struct sctp_tcb *stcb, 1033228653Stuexen struct sctp_nets *net SCTP_UNUSED) 1034163953Srrs{ 1035163953Srrs struct sctp_nets *alt; 1036163953Srrs struct sctp_tmit_chunk *cookie; 1037163953Srrs 1038163953Srrs /* first before all else we must find the cookie */ 1039163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1040163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1041163953Srrs break; 1042163953Srrs } 1043163953Srrs } 1044163953Srrs if (cookie == NULL) { 1045163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1046163953Srrs /* FOOBAR! */ 1047267723Stuexen struct mbuf *op_err; 1048163953Srrs 1049267723Stuexen op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, 1050267723Stuexen "Cookie timer expired, but no cookie"); 1051283822Stuexen inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3; 1052267723Stuexen sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED); 1053163953Srrs } else { 1054165220Srrs#ifdef INVARIANTS 1055163953Srrs panic("Cookie timer expires in wrong state?"); 1056163953Srrs#else 1057169420Srrs SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc)); 1058163953Srrs return (0); 1059163953Srrs#endif 1060163953Srrs } 1061163953Srrs return (0); 1062163953Srrs } 1063163953Srrs /* Ok we found the cookie, threshold management next */ 1064163953Srrs if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1065163953Srrs stcb->asoc.max_init_times)) { 1066163953Srrs /* Assoc is over */ 1067163953Srrs return (1); 1068163953Srrs } 1069163953Srrs /* 1070163953Srrs * cleared theshold management now lets backoff the address & select 1071163953Srrs * an alternate 1072163953Srrs */ 1073163953Srrs stcb->asoc.dropped_special_cnt = 0; 1074210599Srrs sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); 1075163953Srrs alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1076163953Srrs if (alt != cookie->whoTo) { 1077163953Srrs sctp_free_remote_addr(cookie->whoTo); 1078163953Srrs cookie->whoTo = alt; 1079163953Srrs atomic_add_int(&alt->ref_count, 1); 1080163953Srrs } 1081163953Srrs /* Now mark the retran info */ 1082163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1083163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1084163953Srrs } 1085163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 1086163953Srrs /* 1087163953Srrs * Now call the output routine to kick out the cookie again, Note we 1088163953Srrs * don't mark any chunks for retran so that FR will need to kick in 1089163953Srrs * to move these (or a send timer). 1090163953Srrs */ 1091163953Srrs return (0); 1092163953Srrs} 1093163953Srrs 1094163953Srrsint 1095163953Srrssctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1096163953Srrs struct sctp_nets *net) 1097163953Srrs{ 1098163953Srrs struct sctp_nets *alt; 1099163953Srrs struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1100163953Srrs 1101163953Srrs if (stcb->asoc.stream_reset_outstanding == 0) { 1102163953Srrs return (0); 1103163953Srrs } 1104163953Srrs /* find the existing STRRESET, we use the seq number we sent out on */ 1105169420Srrs (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1106163953Srrs if (strrst == NULL) { 1107163953Srrs return (0); 1108163953Srrs } 1109163953Srrs /* do threshold management */ 1110163953Srrs if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1111163953Srrs stcb->asoc.max_send_times)) { 1112163953Srrs /* Assoc is over */ 1113163953Srrs return (1); 1114163953Srrs } 1115163953Srrs /* 1116163953Srrs * cleared theshold management now lets backoff the address & select 1117163953Srrs * an alternate 1118163953Srrs */ 1119210599Srrs sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0); 1120163953Srrs alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1121163953Srrs sctp_free_remote_addr(strrst->whoTo); 1122163953Srrs strrst->whoTo = alt; 1123163953Srrs atomic_add_int(&alt->ref_count, 1); 1124163953Srrs 1125163953Srrs /* See if a ECN Echo is also stranded */ 1126163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1127163953Srrs if ((chk->whoTo == net) && 1128163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1129163953Srrs sctp_free_remote_addr(chk->whoTo); 1130163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1131163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1132163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1133163953Srrs } 1134163953Srrs chk->whoTo = alt; 1135163953Srrs atomic_add_int(&alt->ref_count, 1); 1136163953Srrs } 1137163953Srrs } 1138224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1139163953Srrs /* 1140163953Srrs * If the address went un-reachable, we need to move to 1141163953Srrs * alternates for ALL chk's in queue 1142163953Srrs */ 1143212712Stuexen sctp_move_chunks_from_net(stcb, net); 1144163953Srrs } 1145163953Srrs /* mark the retran info */ 1146163953Srrs if (strrst->sent != SCTP_DATAGRAM_RESEND) 1147163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1148163953Srrs strrst->sent = SCTP_DATAGRAM_RESEND; 1149163953Srrs 1150163953Srrs /* restart the timer */ 1151163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1152163953Srrs return (0); 1153163953Srrs} 1154163953Srrs 1155163953Srrsint 1156163953Srrssctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1157163953Srrs struct sctp_nets *net) 1158163953Srrs{ 1159163953Srrs struct sctp_nets *alt; 1160216822Stuexen struct sctp_tmit_chunk *asconf, *chk; 1161163953Srrs 1162171572Srrs /* is this a first send, or a retransmission? */ 1163179157Srrs if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1164163953Srrs /* compose a new ASCONF chunk and send it */ 1165172190Srrs sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1166163953Srrs } else { 1167171572Srrs /* 1168171572Srrs * Retransmission of the existing ASCONF is needed 1169171572Srrs */ 1170163953Srrs 1171163953Srrs /* find the existing ASCONF */ 1172179157Srrs asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1173163953Srrs if (asconf == NULL) { 1174163953Srrs return (0); 1175163953Srrs } 1176163953Srrs /* do threshold management */ 1177163953Srrs if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1178163953Srrs stcb->asoc.max_send_times)) { 1179163953Srrs /* Assoc is over */ 1180163953Srrs return (1); 1181163953Srrs } 1182163953Srrs if (asconf->snd_count > stcb->asoc.max_send_times) { 1183163953Srrs /* 1184171572Srrs * Something is rotten: our peer is not responding 1185171572Srrs * to ASCONFs but apparently is to other chunks. 1186171572Srrs * i.e. it is not properly handling the chunk type 1187171572Srrs * upper bits. Mark this peer as ASCONF incapable 1188171572Srrs * and cleanup. 1189163953Srrs */ 1190169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1191163953Srrs sctp_asconf_cleanup(stcb, net); 1192163953Srrs return (0); 1193163953Srrs } 1194163953Srrs /* 1195171572Srrs * cleared threshold management, so now backoff the net and 1196171572Srrs * select an alternate 1197163953Srrs */ 1198210599Srrs sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0); 1199163953Srrs alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1200179157Srrs if (asconf->whoTo != alt) { 1201179157Srrs sctp_free_remote_addr(asconf->whoTo); 1202179157Srrs asconf->whoTo = alt; 1203179157Srrs atomic_add_int(&alt->ref_count, 1); 1204179157Srrs } 1205171572Srrs /* See if an ECN Echo is also stranded */ 1206163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1207163953Srrs if ((chk->whoTo == net) && 1208163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1209163953Srrs sctp_free_remote_addr(chk->whoTo); 1210163953Srrs chk->whoTo = alt; 1211163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1212163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1213163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1214163953Srrs } 1215163953Srrs atomic_add_int(&alt->ref_count, 1); 1216163953Srrs } 1217163953Srrs } 1218216822Stuexen TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) { 1219179157Srrs if (chk->whoTo != alt) { 1220179157Srrs sctp_free_remote_addr(chk->whoTo); 1221179157Srrs chk->whoTo = alt; 1222179157Srrs atomic_add_int(&alt->ref_count, 1); 1223179157Srrs } 1224179157Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1225179157Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1226179157Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1227179157Srrs } 1228224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1229163953Srrs /* 1230163953Srrs * If the address went un-reachable, we need to move 1231171572Srrs * to the alternate for ALL chunks in queue 1232163953Srrs */ 1233212712Stuexen sctp_move_chunks_from_net(stcb, net); 1234163953Srrs } 1235163953Srrs /* mark the retran info */ 1236163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 1237163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1238163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 1239179157Srrs 1240179157Srrs /* send another ASCONF if any and we can do */ 1241179157Srrs sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1242163953Srrs } 1243163953Srrs return (0); 1244163953Srrs} 1245163953Srrs 1246172091Srrs/* Mobility adaptation */ 1247172156Srrsvoid 1248172091Srrssctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1249228653Stuexen struct sctp_nets *net SCTP_UNUSED) 1250172091Srrs{ 1251172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1252172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1253172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1254172156Srrs return; 1255172091Srrs } 1256172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1257172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1258172091Srrs sctp_free_remote_addr(stcb->asoc.deleted_primary); 1259172091Srrs stcb->asoc.deleted_primary = NULL; 1260172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1261172156Srrs return; 1262172091Srrs} 1263172091Srrs 1264163953Srrs/* 1265163953Srrs * For the shutdown and shutdown-ack, we do not keep one around on the 1266163953Srrs * control queue. This means we must generate a new one and call the general 1267163953Srrs * chunk output routine, AFTER having done threshold management. 1268214928Stuexen * It is assumed that net is non-NULL. 1269163953Srrs */ 1270163953Srrsint 1271163953Srrssctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1272163953Srrs struct sctp_nets *net) 1273163953Srrs{ 1274163953Srrs struct sctp_nets *alt; 1275163953Srrs 1276163953Srrs /* first threshold managment */ 1277163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1278163953Srrs /* Assoc is over */ 1279163953Srrs return (1); 1280163953Srrs } 1281214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1282163953Srrs /* second select an alternative */ 1283163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1284163953Srrs 1285163953Srrs /* third generate a shutdown into the queue for out net */ 1286214928Stuexen sctp_send_shutdown(stcb, alt); 1287214928Stuexen 1288163953Srrs /* fourth restart timer */ 1289163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1290163953Srrs return (0); 1291163953Srrs} 1292163953Srrs 1293163953Srrsint 1294163953Srrssctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1295163953Srrs struct sctp_nets *net) 1296163953Srrs{ 1297163953Srrs struct sctp_nets *alt; 1298163953Srrs 1299163953Srrs /* first threshold managment */ 1300163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1301163953Srrs /* Assoc is over */ 1302163953Srrs return (1); 1303163953Srrs } 1304214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1305163953Srrs /* second select an alternative */ 1306163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1307163953Srrs 1308163953Srrs /* third generate a shutdown into the queue for out net */ 1309163953Srrs sctp_send_shutdown_ack(stcb, alt); 1310163953Srrs 1311163953Srrs /* fourth restart timer */ 1312163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1313163953Srrs return (0); 1314163953Srrs} 1315163953Srrs 1316163953Srrsstatic void 1317163953Srrssctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1318163953Srrs struct sctp_tcb *stcb) 1319163953Srrs{ 1320163953Srrs struct sctp_stream_queue_pending *sp; 1321217760Stuexen unsigned int i, chks_in_queue = 0; 1322163953Srrs int being_filled = 0; 1323163953Srrs 1324163953Srrs /* 1325163953Srrs * This function is ONLY called when the send/sent queues are empty. 1326163953Srrs */ 1327163953Srrs if ((stcb == NULL) || (inp == NULL)) 1328163953Srrs return; 1329163953Srrs 1330163953Srrs if (stcb->asoc.sent_queue_retran_cnt) { 1331169420Srrs SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1332163953Srrs stcb->asoc.sent_queue_retran_cnt); 1333163953Srrs stcb->asoc.sent_queue_retran_cnt = 0; 1334163953Srrs } 1335217760Stuexen if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1336218241Stuexen /* No stream scheduler information, initialize scheduler */ 1337218241Stuexen stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0); 1338218241Stuexen if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1339218241Stuexen /* yep, we lost a stream or two */ 1340218241Stuexen SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n"); 1341163953Srrs } else { 1342218241Stuexen /* no streams lost */ 1343163953Srrs stcb->asoc.total_output_queue_size = 0; 1344163953Srrs } 1345163953Srrs } 1346163953Srrs /* Check to see if some data queued, if so report it */ 1347217760Stuexen for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1348217760Stuexen if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1349217760Stuexen TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 1350163953Srrs if (sp->msg_is_complete) 1351163953Srrs being_filled++; 1352163953Srrs chks_in_queue++; 1353163953Srrs } 1354163953Srrs } 1355163953Srrs } 1356163953Srrs if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1357169420Srrs SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1358163953Srrs stcb->asoc.stream_queue_cnt, chks_in_queue); 1359163953Srrs } 1360163953Srrs if (chks_in_queue) { 1361163953Srrs /* call the output queue function */ 1362172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1363163953Srrs if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1364163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1365163953Srrs /* 1366163953Srrs * Probably should go in and make it go back through 1367163953Srrs * and add fragments allowed 1368163953Srrs */ 1369163953Srrs if (being_filled == 0) { 1370169420Srrs SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1371163953Srrs chks_in_queue); 1372163953Srrs } 1373163953Srrs } 1374163953Srrs } else { 1375169420Srrs SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1376163953Srrs (u_long)stcb->asoc.total_output_queue_size); 1377163953Srrs stcb->asoc.total_output_queue_size = 0; 1378163953Srrs } 1379163953Srrs} 1380163953Srrs 1381163953Srrsint 1382163953Srrssctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1383224641Stuexen struct sctp_nets *net) 1384163953Srrs{ 1385224641Stuexen uint8_t net_was_pf; 1386171440Srrs 1387228907Stuexen if (net->dest_state & SCTP_ADDR_PF) { 1388228907Stuexen net_was_pf = 1; 1389228907Stuexen } else { 1390228907Stuexen net_was_pf = 0; 1391228907Stuexen } 1392228907Stuexen if (net->hb_responded == 0) { 1393228907Stuexen if (net->ro._s_addr) { 1394228907Stuexen /* 1395228907Stuexen * Invalidate the src address if we did not get a 1396228907Stuexen * response last time. 1397228907Stuexen */ 1398228907Stuexen sctp_free_ifa(net->ro._s_addr); 1399228907Stuexen net->ro._s_addr = NULL; 1400228907Stuexen net->src_addr_selected = 0; 1401224641Stuexen } 1402228907Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1403228907Stuexen if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1404228907Stuexen /* Assoc is over */ 1405228907Stuexen return (1); 1406163953Srrs } 1407163953Srrs } 1408228907Stuexen /* Zero PBA, if it needs it */ 1409228907Stuexen if (net->partial_bytes_acked) { 1410228907Stuexen net->partial_bytes_acked = 0; 1411228907Stuexen } 1412163953Srrs if ((stcb->asoc.total_output_queue_size > 0) && 1413163953Srrs (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1414163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1415163953Srrs sctp_audit_stream_queues_for_size(inp, stcb); 1416163953Srrs } 1417224641Stuexen if (!(net->dest_state & SCTP_ADDR_NOHB) && 1418224641Stuexen !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) { 1419163953Srrs /* 1420224641Stuexen * when move to PF during threshold mangement, a HB has been 1421224641Stuexen * queued in that routine 1422163953Srrs */ 1423234296Stuexen uint32_t ms_gone_by; 1424234296Stuexen 1425234296Stuexen if ((net->last_sent_time.tv_sec > 0) || 1426234296Stuexen (net->last_sent_time.tv_usec > 0)) { 1427234296Stuexen struct timeval diff; 1428234296Stuexen 1429234296Stuexen SCTP_GETTIME_TIMEVAL(&diff); 1430234296Stuexen timevalsub(&diff, &net->last_sent_time); 1431234296Stuexen ms_gone_by = (uint32_t) (diff.tv_sec * 1000) + 1432234296Stuexen (uint32_t) (diff.tv_usec / 1000); 1433234296Stuexen } else { 1434234296Stuexen ms_gone_by = 0xffffffff; 1435234296Stuexen } 1436234297Stuexen if ((ms_gone_by >= net->heart_beat_delay) || 1437234297Stuexen (net->dest_state & SCTP_ADDR_PF)) { 1438234296Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 1439234296Stuexen } 1440163953Srrs } 1441163953Srrs return (0); 1442163953Srrs} 1443163953Srrs 1444163953Srrsvoid 1445163953Srrssctp_pathmtu_timer(struct sctp_inpcb *inp, 1446163953Srrs struct sctp_tcb *stcb, 1447163953Srrs struct sctp_nets *net) 1448163953Srrs{ 1449179157Srrs uint32_t next_mtu, mtu; 1450163953Srrs 1451228653Stuexen next_mtu = sctp_get_next_mtu(net->mtu); 1452169352Srrs 1453179157Srrs if ((next_mtu > net->mtu) && (net->port == 0)) { 1454169352Srrs if ((net->src_addr_selected == 0) || 1455169352Srrs (net->ro._s_addr == NULL) || 1456169352Srrs (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1457169420Srrs if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1458169352Srrs sctp_free_ifa(net->ro._s_addr); 1459169352Srrs net->ro._s_addr = NULL; 1460169352Srrs net->src_addr_selected = 0; 1461169420Srrs } else if (net->ro._s_addr == NULL) { 1462179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1463179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1464179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1465179157Srrs 1466179157Srrs /* KAME hack: embed scopeid */ 1467197288Srrs (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 1468179157Srrs } 1469179157Srrs#endif 1470179157Srrs 1471169420Srrs net->ro._s_addr = sctp_source_address_selection(inp, 1472169420Srrs stcb, 1473169420Srrs (sctp_route_t *) & net->ro, 1474169420Srrs net, 0, stcb->asoc.vrf_id); 1475179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1476179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1477179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1478179157Srrs 1479179157Srrs (void)sa6_recoverscope(sin6); 1480179157Srrs } 1481179157Srrs#endif /* INET6 */ 1482169352Srrs } 1483169352Srrs if (net->ro._s_addr) 1484169352Srrs net->src_addr_selected = 1; 1485169352Srrs } 1486169352Srrs if (net->ro._s_addr) { 1487169352Srrs mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); 1488270350Stuexen#if defined(INET) || defined(INET6) 1489185694Srrs if (net->port) { 1490185694Srrs mtu -= sizeof(struct udphdr); 1491185694Srrs } 1492270350Stuexen#endif 1493169352Srrs if (mtu > next_mtu) { 1494163953Srrs net->mtu = next_mtu; 1495163953Srrs } 1496163953Srrs } 1497163953Srrs } 1498163953Srrs /* restart the timer */ 1499163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 1500163953Srrs} 1501163953Srrs 1502163953Srrsvoid 1503163953Srrssctp_autoclose_timer(struct sctp_inpcb *inp, 1504163953Srrs struct sctp_tcb *stcb, 1505163953Srrs struct sctp_nets *net) 1506163953Srrs{ 1507163953Srrs struct timeval tn, *tim_touse; 1508163953Srrs struct sctp_association *asoc; 1509163953Srrs int ticks_gone_by; 1510163953Srrs 1511169378Srrs (void)SCTP_GETTIME_TIMEVAL(&tn); 1512163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1513163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1514163953Srrs /* Auto close is on */ 1515163953Srrs asoc = &stcb->asoc; 1516163953Srrs /* pick the time to use */ 1517163953Srrs if (asoc->time_last_rcvd.tv_sec > 1518163953Srrs asoc->time_last_sent.tv_sec) { 1519163953Srrs tim_touse = &asoc->time_last_rcvd; 1520163953Srrs } else { 1521163953Srrs tim_touse = &asoc->time_last_sent; 1522163953Srrs } 1523163953Srrs /* Now has long enough transpired to autoclose? */ 1524163953Srrs ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec); 1525163953Srrs if ((ticks_gone_by > 0) && 1526163953Srrs (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) { 1527163953Srrs /* 1528163953Srrs * autoclose time has hit, call the output routine, 1529163953Srrs * which should do nothing just to be SURE we don't 1530163953Srrs * have hanging data. We can then safely check the 1531163953Srrs * queues and know that we are clear to send 1532163953Srrs * shutdown 1533163953Srrs */ 1534172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); 1535163953Srrs /* Are we clean? */ 1536163953Srrs if (TAILQ_EMPTY(&asoc->send_queue) && 1537163953Srrs TAILQ_EMPTY(&asoc->sent_queue)) { 1538163953Srrs /* 1539163953Srrs * there is nothing queued to send, so I'm 1540163953Srrs * done... 1541163953Srrs */ 1542166675Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1543163953Srrs /* only send SHUTDOWN 1st time thru */ 1544224641Stuexen struct sctp_nets *netp; 1545224641Stuexen 1546246588Stuexen if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 1547246588Stuexen (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 1548246588Stuexen SCTP_STAT_DECR_GAUGE32(sctps_currestab); 1549246588Stuexen } 1550246588Stuexen SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 1551246588Stuexen SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 1552246588Stuexen sctp_stop_timers_for_shutdown(stcb); 1553224641Stuexen if (stcb->asoc.alternate) { 1554224641Stuexen netp = stcb->asoc.alternate; 1555224641Stuexen } else { 1556224641Stuexen netp = stcb->asoc.primary_destination; 1557224641Stuexen } 1558224641Stuexen sctp_send_shutdown(stcb, netp); 1559163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 1560163953Srrs stcb->sctp_ep, stcb, 1561224641Stuexen netp); 1562163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1563163953Srrs stcb->sctp_ep, stcb, 1564224641Stuexen netp); 1565163953Srrs } 1566163953Srrs } 1567163953Srrs } else { 1568163953Srrs /* 1569163953Srrs * No auto close at this time, reset t-o to check 1570163953Srrs * later 1571163953Srrs */ 1572163953Srrs int tmp; 1573163953Srrs 1574163953Srrs /* fool the timer startup to use the time left */ 1575163953Srrs tmp = asoc->sctp_autoclose_ticks; 1576163953Srrs asoc->sctp_autoclose_ticks -= ticks_gone_by; 1577163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1578163953Srrs net); 1579163953Srrs /* restore the real tick value */ 1580163953Srrs asoc->sctp_autoclose_ticks = tmp; 1581163953Srrs } 1582163953Srrs } 1583163953Srrs} 1584