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("$FreeBSD$"); 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 88296052Stuexenstatic 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); 113283822Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, 114296052Stuexen inp, stcb, net, 115283822Stuexen SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); 116296052Stuexen 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, 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 156294145Stuexen op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 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) { 411294173Stuexen if (net->RTO_measured) { 412294173Stuexen net->RTO = stcb->asoc.minrto; 413294173Stuexen } else { 414294173Stuexen net->RTO = stcb->asoc.initial_rto; 415294173Stuexen } 416170642Srrs } 417163953Srrs net->RTO <<= 1; 418163953Srrs if (net->RTO > stcb->asoc.maxrto) { 419163953Srrs net->RTO = stcb->asoc.maxrto; 420163953Srrs } 421210599Srrs if ((win_probe == 0) && (num_marked || num_abandoned)) { 422163953Srrs /* We don't apply penalty to window probe scenarios */ 423171440Srrs /* JRS - Use the congestion control given in the CC module */ 424171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 425163953Srrs } 426163953Srrs} 427163953Srrs 428184333Srrs#ifndef INVARIANTS 429184333Srrsstatic void 430182367Srrssctp_recover_sent_list(struct sctp_tcb *stcb) 431182367Srrs{ 432216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 433182367Srrs struct sctp_association *asoc; 434182367Srrs 435182367Srrs asoc = &stcb->asoc; 436216822Stuexen TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 437216825Stuexen if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) { 438182367Srrs SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", 439240148Stuexen (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq); 440243157Stuexen if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 441242714Stuexen if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 442242714Stuexen asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 443242714Stuexen } 444242714Stuexen } 445294210Stuexen if ((asoc->strmout[chk->rec.data.stream_number].chunks_on_queues == 0) && 446294210Stuexen (asoc->strmout[chk->rec.data.stream_number].state == SCTP_STREAM_RESET_PENDING) && 447294210Stuexen TAILQ_EMPTY(&asoc->strmout[chk->rec.data.stream_number].outqueue)) { 448294210Stuexen asoc->trigger_reset = 1; 449294210Stuexen } 450182367Srrs TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 451255190Stuexen if (PR_SCTP_ENABLED(chk->flags)) { 452182367Srrs if (asoc->pr_sctp_cnt != 0) 453182367Srrs asoc->pr_sctp_cnt--; 454182367Srrs } 455182367Srrs if (chk->data) { 456182367Srrs /* sa_ignore NO_NULL_CHK */ 457182367Srrs sctp_free_bufspace(stcb, asoc, chk, 1); 458182367Srrs sctp_m_freem(chk->data); 459216822Stuexen chk->data = NULL; 460270357Stuexen if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) { 461182367Srrs asoc->sent_queue_cnt_removeable--; 462182367Srrs } 463182367Srrs } 464182367Srrs asoc->sent_queue_cnt--; 465221627Stuexen sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 466182367Srrs } 467182367Srrs } 468182367Srrs SCTP_PRINTF("after recover order is as follows\n"); 469216822Stuexen TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 470240148Stuexen SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq); 471182367Srrs } 472182367Srrs} 473182367Srrs 474184333Srrs#endif 475184333Srrs 476163953Srrsstatic int 477163953Srrssctp_mark_all_for_resend(struct sctp_tcb *stcb, 478163953Srrs struct sctp_nets *net, 479163953Srrs struct sctp_nets *alt, 480163953Srrs int window_probe, 481210599Srrs int *num_marked, 482210599Srrs int *num_abandoned) 483163953Srrs{ 484163953Srrs 485163953Srrs /* 486163953Srrs * Mark all chunks (well not all) that were sent to *net for 487163953Srrs * retransmission. Move them to alt for there destination as well... 488163953Srrs * We only mark chunks that have been outstanding long enough to 489163953Srrs * have received feed-back. 490163953Srrs */ 491216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 492163953Srrs struct sctp_nets *lnets; 493163953Srrs struct timeval now, min_wait, tv; 494219014Stuexen int cur_rto; 495210599Srrs int cnt_abandoned; 496168709Srrs int audit_tf, num_mk, fir; 497163953Srrs unsigned int cnt_mk; 498168709Srrs uint32_t orig_flight, orig_tf; 499163953Srrs uint32_t tsnlast, tsnfirst; 500182367Srrs int recovery_cnt = 0; 501163953Srrs 502171440Srrs 503163953Srrs /* none in flight now */ 504163953Srrs audit_tf = 0; 505163953Srrs fir = 0; 506163953Srrs /* 507163953Srrs * figure out how long a data chunk must be pending before we can 508163953Srrs * mark it .. 509163953Srrs */ 510169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 511163953Srrs /* get cur rto in micro-seconds */ 512219014Stuexen cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; 513219014Stuexen cur_rto *= 1000; 514224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 515219014Stuexen sctp_log_fr(cur_rto, 516170744Srrs stcb->asoc.peers_rwnd, 517170744Srrs window_probe, 518170744Srrs SCTP_FR_T3_MARK_TIME); 519224641Stuexen sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT); 520170744Srrs sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 521170744Srrs } 522219014Stuexen tv.tv_sec = cur_rto / 1000000; 523219014Stuexen tv.tv_usec = cur_rto % 1000000; 524163953Srrs min_wait = now; 525163953Srrs timevalsub(&min_wait, &tv); 526163953Srrs if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 527163953Srrs /* 528163953Srrs * if we hit here, we don't have enough seconds on the clock 529163953Srrs * to account for the RTO. We just let the lower seconds be 530163953Srrs * the bounds and don't worry about it. This may mean we 531163953Srrs * will mark a lot more than we should. 532163953Srrs */ 533163953Srrs min_wait.tv_sec = min_wait.tv_usec = 0; 534163953Srrs } 535224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 536219014Stuexen sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 537170744Srrs sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 538170744Srrs } 539163953Srrs /* 540163953Srrs * Our rwnd will be incorrect here since we are not adding back the 541163953Srrs * cnt * mbuf but we will fix that down below. 542163953Srrs */ 543163953Srrs orig_flight = net->flight_size; 544168709Srrs orig_tf = stcb->asoc.total_flight; 545168709Srrs 546163953Srrs net->fast_retran_ip = 0; 547163953Srrs /* Now on to each chunk */ 548210599Srrs cnt_abandoned = 0; 549163953Srrs num_mk = cnt_mk = 0; 550163953Srrs tsnfirst = tsnlast = 0; 551184333Srrs#ifndef INVARIANTS 552182367Srrsstart_again: 553184333Srrs#endif 554216822Stuexen TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) { 555216825Stuexen if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) { 556163953Srrs /* Strange case our list got out of order? */ 557258454Stuexen SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n", 558182367Srrs (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq); 559182367Srrs recovery_cnt++; 560182367Srrs#ifdef INVARIANTS 561182367Srrs panic("last acked >= chk on sent-Q"); 562182367Srrs#else 563182367Srrs SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); 564182367Srrs sctp_recover_sent_list(stcb); 565182367Srrs if (recovery_cnt < 10) { 566182367Srrs goto start_again; 567182367Srrs } else { 568182367Srrs SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); 569182367Srrs } 570182367Srrs#endif 571163953Srrs } 572163953Srrs if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 573163953Srrs /* 574163953Srrs * found one to mark: If it is less than 575163953Srrs * DATAGRAM_ACKED it MUST not be a skipped or marked 576163953Srrs * TSN but instead one that is either already set 577163953Srrs * for retransmission OR one that needs 578163953Srrs * retransmission. 579163953Srrs */ 580163953Srrs 581163953Srrs /* validate its been outstanding long enough */ 582224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 583170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, 584170744Srrs chk->sent_rcv_time.tv_sec, 585170744Srrs chk->sent_rcv_time.tv_usec, 586170744Srrs SCTP_FR_T3_MARK_TIME); 587170744Srrs } 588163953Srrs if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 589163953Srrs /* 590163953Srrs * we have reached a chunk that was sent 591163953Srrs * some seconds past our min.. forget it we 592163953Srrs * will find no more to send. 593163953Srrs */ 594224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 595170744Srrs sctp_log_fr(0, 596170744Srrs chk->sent_rcv_time.tv_sec, 597170744Srrs chk->sent_rcv_time.tv_usec, 598170744Srrs SCTP_FR_T3_STOPPED); 599170744Srrs } 600163953Srrs continue; 601163953Srrs } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 602163953Srrs (window_probe == 0)) { 603163953Srrs /* 604163953Srrs * we must look at the micro seconds to 605163953Srrs * know. 606163953Srrs */ 607163953Srrs if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 608163953Srrs /* 609163953Srrs * ok it was sent after our boundary 610163953Srrs * time. 611163953Srrs */ 612163953Srrs continue; 613163953Srrs } 614163953Srrs } 615270357Stuexen if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) { 616163953Srrs /* Is it expired? */ 617212801Stuexen if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { 618163953Srrs /* Yes so drop it */ 619163953Srrs if (chk->data) { 620169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 621163953Srrs chk, 622235416Stuexen 1, 623189790Srrs SCTP_SO_NOT_LOCKED); 624210599Srrs cnt_abandoned++; 625163953Srrs } 626185694Srrs continue; 627163953Srrs } 628163953Srrs } 629270357Stuexen if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) { 630163953Srrs /* Has it been retransmitted tv_sec times? */ 631163953Srrs if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 632163953Srrs if (chk->data) { 633169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 634163953Srrs chk, 635235416Stuexen 1, 636189790Srrs SCTP_SO_NOT_LOCKED); 637210599Srrs cnt_abandoned++; 638163953Srrs } 639185694Srrs continue; 640163953Srrs } 641163953Srrs } 642168709Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 643163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 644163953Srrs num_mk++; 645163953Srrs if (fir == 0) { 646163953Srrs fir = 1; 647163953Srrs tsnfirst = chk->rec.data.TSN_seq; 648163953Srrs } 649163953Srrs tsnlast = chk->rec.data.TSN_seq; 650224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 651170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 652170744Srrs 0, SCTP_FR_T3_MARKED); 653170744Srrs } 654168709Srrs if (chk->rec.data.chunk_was_revoked) { 655168709Srrs /* deflate the cwnd */ 656168709Srrs chk->whoTo->cwnd -= chk->book_size; 657168709Srrs chk->rec.data.chunk_was_revoked = 0; 658168709Srrs } 659168709Srrs net->marked_retrans++; 660168709Srrs stcb->asoc.marked_retrans++; 661179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 662170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 663170744Srrs chk->whoTo->flight_size, 664170744Srrs chk->book_size, 665170744Srrs (uintptr_t) chk->whoTo, 666170744Srrs chk->rec.data.TSN_seq); 667170744Srrs } 668168709Srrs sctp_flight_size_decrease(chk); 669168709Srrs sctp_total_flight_decrease(stcb, chk); 670168709Srrs stcb->asoc.peers_rwnd += chk->send_size; 671179783Srrs stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 672163953Srrs } 673163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 674163953Srrs SCTP_STAT_INCR(sctps_markedretrans); 675165220Srrs 676163953Srrs /* reset the TSN for striking and other FR stuff */ 677163953Srrs chk->rec.data.doing_fast_retransmit = 0; 678163953Srrs /* Clear any time so NO RTT is being done */ 679219397Srrs 680219397Srrs if (chk->do_rtt) { 681219397Srrs if (chk->whoTo->rto_needed == 0) { 682219397Srrs chk->whoTo->rto_needed = 1; 683219397Srrs } 684219397Srrs } 685163953Srrs chk->do_rtt = 0; 686163953Srrs if (alt != net) { 687163953Srrs sctp_free_remote_addr(chk->whoTo); 688163953Srrs chk->no_fr_allowed = 1; 689163953Srrs chk->whoTo = alt; 690163953Srrs atomic_add_int(&alt->ref_count, 1); 691163953Srrs } else { 692163953Srrs chk->no_fr_allowed = 0; 693163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 694163953Srrs chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 695163953Srrs } else { 696163953Srrs chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 697163953Srrs } 698163953Srrs } 699170181Srrs /* 700170181Srrs * CMT: Do not allow FRs on retransmitted TSNs. 701170181Srrs */ 702216669Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 703163953Srrs chk->no_fr_allowed = 1; 704163953Srrs } 705210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 706163953Srrs } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 707163953Srrs /* remember highest acked one */ 708163953Srrs could_be_sent = chk; 709210599Srrs#endif 710163953Srrs } 711163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 712163953Srrs cnt_mk++; 713163953Srrs } 714163953Srrs } 715168709Srrs if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 716168709Srrs /* we did not subtract the same things? */ 717168709Srrs audit_tf = 1; 718168709Srrs } 719224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 720170744Srrs sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 721170744Srrs } 722163953Srrs#ifdef SCTP_DEBUG 723169420Srrs if (num_mk) { 724169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 725169420Srrs tsnlast); 726169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n", 727169420Srrs num_mk, (u_long)stcb->asoc.peers_rwnd); 728169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 729169420Srrs tsnlast); 730169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n", 731169420Srrs num_mk, 732169420Srrs (int)stcb->asoc.peers_rwnd); 733163953Srrs } 734163953Srrs#endif 735163953Srrs *num_marked = num_mk; 736210599Srrs *num_abandoned = cnt_abandoned; 737210493Srrs /* 738210493Srrs * Now check for a ECN Echo that may be stranded And include the 739210493Srrs * cnt_mk'd to have all resends in the control queue. 740210493Srrs */ 741210493Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 742210493Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 743210493Srrs cnt_mk++; 744210493Srrs } 745210493Srrs if ((chk->whoTo == net) && 746210493Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 747210493Srrs sctp_free_remote_addr(chk->whoTo); 748210493Srrs chk->whoTo = alt; 749210493Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 750210493Srrs chk->sent = SCTP_DATAGRAM_RESEND; 751210493Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 752210493Srrs cnt_mk++; 753210493Srrs } 754210493Srrs atomic_add_int(&alt->ref_count, 1); 755210493Srrs } 756210493Srrs } 757210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 758163953Srrs if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 759163953Srrs /* fix it so we retransmit the highest acked anyway */ 760163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 761163953Srrs cnt_mk++; 762163953Srrs could_be_sent->sent = SCTP_DATAGRAM_RESEND; 763163953Srrs } 764210599Srrs#endif 765163953Srrs if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 766165220Srrs#ifdef INVARIANTS 767171477Srrs SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 768171477Srrs cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 769163953Srrs#endif 770163953Srrs#ifndef SCTP_AUDITING_ENABLED 771163953Srrs stcb->asoc.sent_queue_retran_cnt = cnt_mk; 772163953Srrs#endif 773163953Srrs } 774163953Srrs if (audit_tf) { 775169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 776169420Srrs "Audit total flight due to negative value net:%p\n", 777240148Stuexen (void *)net); 778163953Srrs stcb->asoc.total_flight = 0; 779163953Srrs stcb->asoc.total_flight_count = 0; 780163953Srrs /* Clear all networks flight size */ 781163953Srrs TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 782163953Srrs lnets->flight_size = 0; 783169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 784169420Srrs "Net:%p c-f cwnd:%d ssthresh:%d\n", 785240148Stuexen (void *)lnets, lnets->cwnd, lnets->ssthresh); 786163953Srrs } 787163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 788163953Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 789179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 790170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 791170744Srrs chk->whoTo->flight_size, 792170744Srrs chk->book_size, 793170744Srrs (uintptr_t) chk->whoTo, 794170744Srrs chk->rec.data.TSN_seq); 795170744Srrs } 796168709Srrs sctp_flight_size_increase(chk); 797168709Srrs sctp_total_flight_increase(stcb, chk); 798163953Srrs } 799163953Srrs } 800163953Srrs } 801163953Srrs /* We return 1 if we only have a window probe outstanding */ 802163953Srrs return (0); 803163953Srrs} 804163953Srrs 805163953Srrs 806163953Srrsint 807163953Srrssctp_t3rxt_timer(struct sctp_inpcb *inp, 808163953Srrs struct sctp_tcb *stcb, 809163953Srrs struct sctp_nets *net) 810163953Srrs{ 811163953Srrs struct sctp_nets *alt; 812210599Srrs int win_probe, num_mk, num_abandoned; 813163953Srrs 814179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 815170744Srrs sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 816170744Srrs } 817179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 818163953Srrs struct sctp_nets *lnet; 819163953Srrs 820163953Srrs TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 821163953Srrs if (net == lnet) { 822163953Srrs sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 823163953Srrs } else { 824163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 825163953Srrs } 826163953Srrs } 827163953Srrs } 828163953Srrs /* Find an alternate and mark those for retransmission */ 829163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 830163953Srrs (stcb->asoc.total_flight < net->mtu)) { 831163953Srrs SCTP_STAT_INCR(sctps_timowindowprobe); 832163953Srrs win_probe = 1; 833163953Srrs } else { 834163953Srrs win_probe = 0; 835163953Srrs } 836168709Srrs 837163953Srrs if (win_probe == 0) { 838163953Srrs /* We don't do normal threshold management on window probes */ 839163953Srrs if (sctp_threshold_management(inp, stcb, net, 840163953Srrs stcb->asoc.max_send_times)) { 841163953Srrs /* Association was destroyed */ 842163953Srrs return (1); 843163953Srrs } else { 844163953Srrs if (net != stcb->asoc.primary_destination) { 845163953Srrs /* send a immediate HB if our RTO is stale */ 846163953Srrs struct timeval now; 847163953Srrs unsigned int ms_goneby; 848163953Srrs 849169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 850163953Srrs if (net->last_sent_time.tv_sec) { 851163953Srrs ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 852163953Srrs } else { 853163953Srrs ms_goneby = 0; 854163953Srrs } 855224641Stuexen if ((net->dest_state & SCTP_ADDR_PF) == 0) { 856224641Stuexen if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 857185694Srrs /* 858224641Stuexen * no recent feed back in an 859224641Stuexen * RTO or more, request a 860224641Stuexen * RTT update 861185694Srrs */ 862224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 863224641Stuexen } 864163953Srrs } 865163953Srrs } 866163953Srrs } 867163953Srrs } else { 868163953Srrs /* 869163953Srrs * For a window probe we don't penalize the net's but only 870163953Srrs * the association. This may fail it if SACKs are not coming 871163953Srrs * back. If sack's are coming with rwnd locked at 0, we will 872163953Srrs * continue to hold things waiting for rwnd to raise 873163953Srrs */ 874163953Srrs if (sctp_threshold_management(inp, stcb, NULL, 875163953Srrs stcb->asoc.max_send_times)) { 876163953Srrs /* Association was destroyed */ 877163953Srrs return (1); 878163953Srrs } 879163953Srrs } 880224641Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 881224641Stuexen if (net->pf_threshold < net->failure_threshold) { 882224641Stuexen alt = sctp_find_alternate_net(stcb, net, 2); 883224641Stuexen } else { 884224641Stuexen /* 885224641Stuexen * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is 886224641Stuexen * being used, then pick dest with largest ssthresh 887224641Stuexen * for any retransmission. 888224641Stuexen */ 889224641Stuexen alt = sctp_find_alternate_net(stcb, net, 1); 890224641Stuexen /* 891224641Stuexen * CUCv2: If a different dest is picked for the 892224641Stuexen * retransmission, then new (rtx-)pseudo_cumack 893224641Stuexen * needs to be tracked for orig dest. Let CUCv2 894224641Stuexen * track new (rtx-) pseudo-cumack always. 895224641Stuexen */ 896224641Stuexen net->find_pseudo_cumack = 1; 897224641Stuexen net->find_rtx_pseudo_cumack = 1; 898224641Stuexen } 899224641Stuexen } else { 900224641Stuexen alt = sctp_find_alternate_net(stcb, net, 0); 901224641Stuexen } 902224641Stuexen 903224641Stuexen num_mk = 0; 904224641Stuexen num_abandoned = 0; 905224641Stuexen (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, 906224641Stuexen &num_mk, &num_abandoned); 907224641Stuexen /* FR Loss recovery just ended with the T3. */ 908224641Stuexen stcb->asoc.fast_retran_loss_recovery = 0; 909224641Stuexen 910224641Stuexen /* CMT FR loss recovery ended with the T3 */ 911224641Stuexen net->fast_retran_loss_recovery = 0; 912224641Stuexen if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 913224641Stuexen (net->flight_size == 0)) { 914224641Stuexen (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 915224641Stuexen } 916224641Stuexen /* 917224641Stuexen * setup the sat loss recovery that prevents satellite cwnd advance. 918224641Stuexen */ 919224641Stuexen stcb->asoc.sat_t3_loss_recovery = 1; 920224641Stuexen stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 921224641Stuexen 922224641Stuexen /* Backoff the timer and cwnd */ 923224641Stuexen sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); 924224641Stuexen if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) || 925224641Stuexen (net->dest_state & SCTP_ADDR_PF)) { 926163953Srrs /* Move all pending over too */ 927212712Stuexen sctp_move_chunks_from_net(stcb, net); 928169352Srrs 929169352Srrs /* 930169352Srrs * Get the address that failed, to force a new src address 931169352Srrs * selecton and a route allocation. 932169352Srrs */ 933169352Srrs if (net->ro._s_addr) { 934169352Srrs sctp_free_ifa(net->ro._s_addr); 935169352Srrs net->ro._s_addr = NULL; 936169352Srrs } 937169352Srrs net->src_addr_selected = 0; 938169352Srrs 939169352Srrs /* Force a route allocation too */ 940169352Srrs if (net->ro.ro_rt) { 941169352Srrs RTFREE(net->ro.ro_rt); 942169352Srrs net->ro.ro_rt = NULL; 943169352Srrs } 944163953Srrs /* Was it our primary? */ 945163953Srrs if ((stcb->asoc.primary_destination == net) && (alt != net)) { 946163953Srrs /* 947163953Srrs * Yes, note it as such and find an alternate note: 948163953Srrs * this means HB code must use this to resent the 949163953Srrs * primary if it goes active AND if someone does a 950163953Srrs * change-primary then this flag must be cleared 951163953Srrs * from any net structures. 952163953Srrs */ 953224641Stuexen if (stcb->asoc.alternate) { 954224641Stuexen sctp_free_remote_addr(stcb->asoc.alternate); 955163953Srrs } 956224641Stuexen stcb->asoc.alternate = alt; 957224641Stuexen atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 958163953Srrs } 959163953Srrs } 960163953Srrs /* 961163953Srrs * Special case for cookie-echo'ed case, we don't do output but must 962163953Srrs * await the COOKIE-ACK before retransmission 963163953Srrs */ 964163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 965163953Srrs /* 966163953Srrs * Here we just reset the timer and start again since we 967163953Srrs * have not established the asoc 968163953Srrs */ 969163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 970163953Srrs return (0); 971163953Srrs } 972270357Stuexen if (stcb->asoc.prsctp_supported) { 973163953Srrs struct sctp_tmit_chunk *lchk; 974163953Srrs 975163953Srrs lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 976163953Srrs /* C3. See if we need to send a Fwd-TSN */ 977216825Stuexen if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { 978163953Srrs send_forward_tsn(stcb, &stcb->asoc); 979163953Srrs if (lchk) { 980163953Srrs /* Assure a timer is up */ 981163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 982163953Srrs } 983163953Srrs } 984163953Srrs } 985179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 986170744Srrs sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 987170744Srrs } 988163953Srrs return (0); 989163953Srrs} 990163953Srrs 991163953Srrsint 992163953Srrssctp_t1init_timer(struct sctp_inpcb *inp, 993163953Srrs struct sctp_tcb *stcb, 994163953Srrs struct sctp_nets *net) 995163953Srrs{ 996163953Srrs /* bump the thresholds */ 997163953Srrs if (stcb->asoc.delayed_connection) { 998163953Srrs /* 999163953Srrs * special hook for delayed connection. The library did NOT 1000163953Srrs * complete the rest of its sends. 1001163953Srrs */ 1002163953Srrs stcb->asoc.delayed_connection = 0; 1003172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1004163953Srrs return (0); 1005163953Srrs } 1006163953Srrs if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) { 1007163953Srrs return (0); 1008163953Srrs } 1009163953Srrs if (sctp_threshold_management(inp, stcb, net, 1010163953Srrs stcb->asoc.max_init_times)) { 1011163953Srrs /* Association was destroyed */ 1012163953Srrs return (1); 1013163953Srrs } 1014163953Srrs stcb->asoc.dropped_special_cnt = 0; 1015210599Srrs sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); 1016163953Srrs if (stcb->asoc.initial_init_rto_max < net->RTO) { 1017163953Srrs net->RTO = stcb->asoc.initial_init_rto_max; 1018163953Srrs } 1019163953Srrs if (stcb->asoc.numnets > 1) { 1020163953Srrs /* If we have more than one addr use it */ 1021163953Srrs struct sctp_nets *alt; 1022163953Srrs 1023163953Srrs alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1024214928Stuexen if (alt != stcb->asoc.primary_destination) { 1025212712Stuexen sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); 1026163953Srrs stcb->asoc.primary_destination = alt; 1027163953Srrs } 1028163953Srrs } 1029163953Srrs /* Send out a new init */ 1030172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1031163953Srrs return (0); 1032163953Srrs} 1033163953Srrs 1034163953Srrs/* 1035163953Srrs * For cookie and asconf we actually need to find and mark for resend, then 1036163953Srrs * increment the resend counter (after all the threshold management stuff of 1037163953Srrs * course). 1038163953Srrs */ 1039163953Srrsint 1040163953Srrssctp_cookie_timer(struct sctp_inpcb *inp, 1041163953Srrs struct sctp_tcb *stcb, 1042228653Stuexen struct sctp_nets *net SCTP_UNUSED) 1043163953Srrs{ 1044163953Srrs struct sctp_nets *alt; 1045163953Srrs struct sctp_tmit_chunk *cookie; 1046163953Srrs 1047163953Srrs /* first before all else we must find the cookie */ 1048163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1049163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1050163953Srrs break; 1051163953Srrs } 1052163953Srrs } 1053163953Srrs if (cookie == NULL) { 1054163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1055163953Srrs /* FOOBAR! */ 1056267723Stuexen struct mbuf *op_err; 1057163953Srrs 1058294145Stuexen op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 1059267723Stuexen "Cookie timer expired, but no cookie"); 1060283822Stuexen inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3; 1061267723Stuexen sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED); 1062163953Srrs } else { 1063165220Srrs#ifdef INVARIANTS 1064163953Srrs panic("Cookie timer expires in wrong state?"); 1065163953Srrs#else 1066169420Srrs SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc)); 1067163953Srrs return (0); 1068163953Srrs#endif 1069163953Srrs } 1070163953Srrs return (0); 1071163953Srrs } 1072163953Srrs /* Ok we found the cookie, threshold management next */ 1073163953Srrs if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1074163953Srrs stcb->asoc.max_init_times)) { 1075163953Srrs /* Assoc is over */ 1076163953Srrs return (1); 1077163953Srrs } 1078163953Srrs /* 1079163953Srrs * cleared theshold management now lets backoff the address & select 1080163953Srrs * an alternate 1081163953Srrs */ 1082163953Srrs stcb->asoc.dropped_special_cnt = 0; 1083210599Srrs sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); 1084163953Srrs alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1085163953Srrs if (alt != cookie->whoTo) { 1086163953Srrs sctp_free_remote_addr(cookie->whoTo); 1087163953Srrs cookie->whoTo = alt; 1088163953Srrs atomic_add_int(&alt->ref_count, 1); 1089163953Srrs } 1090163953Srrs /* Now mark the retran info */ 1091163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1092163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1093163953Srrs } 1094163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 1095163953Srrs /* 1096163953Srrs * Now call the output routine to kick out the cookie again, Note we 1097163953Srrs * don't mark any chunks for retran so that FR will need to kick in 1098163953Srrs * to move these (or a send timer). 1099163953Srrs */ 1100163953Srrs return (0); 1101163953Srrs} 1102163953Srrs 1103163953Srrsint 1104163953Srrssctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1105163953Srrs struct sctp_nets *net) 1106163953Srrs{ 1107163953Srrs struct sctp_nets *alt; 1108163953Srrs struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1109163953Srrs 1110163953Srrs if (stcb->asoc.stream_reset_outstanding == 0) { 1111163953Srrs return (0); 1112163953Srrs } 1113163953Srrs /* find the existing STRRESET, we use the seq number we sent out on */ 1114169420Srrs (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1115163953Srrs if (strrst == NULL) { 1116163953Srrs return (0); 1117163953Srrs } 1118163953Srrs /* do threshold management */ 1119163953Srrs if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1120163953Srrs stcb->asoc.max_send_times)) { 1121163953Srrs /* Assoc is over */ 1122163953Srrs return (1); 1123163953Srrs } 1124163953Srrs /* 1125163953Srrs * cleared theshold management now lets backoff the address & select 1126163953Srrs * an alternate 1127163953Srrs */ 1128210599Srrs sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0); 1129163953Srrs alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1130163953Srrs sctp_free_remote_addr(strrst->whoTo); 1131163953Srrs strrst->whoTo = alt; 1132163953Srrs atomic_add_int(&alt->ref_count, 1); 1133163953Srrs 1134163953Srrs /* See if a ECN Echo is also stranded */ 1135163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1136163953Srrs if ((chk->whoTo == net) && 1137163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1138163953Srrs sctp_free_remote_addr(chk->whoTo); 1139163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1140163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1141163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1142163953Srrs } 1143163953Srrs chk->whoTo = alt; 1144163953Srrs atomic_add_int(&alt->ref_count, 1); 1145163953Srrs } 1146163953Srrs } 1147224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1148163953Srrs /* 1149163953Srrs * If the address went un-reachable, we need to move to 1150163953Srrs * alternates for ALL chk's in queue 1151163953Srrs */ 1152212712Stuexen sctp_move_chunks_from_net(stcb, net); 1153163953Srrs } 1154163953Srrs /* mark the retran info */ 1155163953Srrs if (strrst->sent != SCTP_DATAGRAM_RESEND) 1156163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1157163953Srrs strrst->sent = SCTP_DATAGRAM_RESEND; 1158163953Srrs 1159163953Srrs /* restart the timer */ 1160163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1161163953Srrs return (0); 1162163953Srrs} 1163163953Srrs 1164163953Srrsint 1165163953Srrssctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1166163953Srrs struct sctp_nets *net) 1167163953Srrs{ 1168163953Srrs struct sctp_nets *alt; 1169216822Stuexen struct sctp_tmit_chunk *asconf, *chk; 1170163953Srrs 1171171572Srrs /* is this a first send, or a retransmission? */ 1172179157Srrs if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1173163953Srrs /* compose a new ASCONF chunk and send it */ 1174172190Srrs sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1175163953Srrs } else { 1176171572Srrs /* 1177171572Srrs * Retransmission of the existing ASCONF is needed 1178171572Srrs */ 1179163953Srrs 1180163953Srrs /* find the existing ASCONF */ 1181179157Srrs asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1182163953Srrs if (asconf == NULL) { 1183163953Srrs return (0); 1184163953Srrs } 1185163953Srrs /* do threshold management */ 1186163953Srrs if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1187163953Srrs stcb->asoc.max_send_times)) { 1188163953Srrs /* Assoc is over */ 1189163953Srrs return (1); 1190163953Srrs } 1191163953Srrs if (asconf->snd_count > stcb->asoc.max_send_times) { 1192163953Srrs /* 1193171572Srrs * Something is rotten: our peer is not responding 1194171572Srrs * to ASCONFs but apparently is to other chunks. 1195171572Srrs * i.e. it is not properly handling the chunk type 1196171572Srrs * upper bits. Mark this peer as ASCONF incapable 1197171572Srrs * and cleanup. 1198163953Srrs */ 1199169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1200163953Srrs sctp_asconf_cleanup(stcb, net); 1201163953Srrs return (0); 1202163953Srrs } 1203163953Srrs /* 1204171572Srrs * cleared threshold management, so now backoff the net and 1205171572Srrs * select an alternate 1206163953Srrs */ 1207210599Srrs sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0); 1208163953Srrs alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1209179157Srrs if (asconf->whoTo != alt) { 1210179157Srrs sctp_free_remote_addr(asconf->whoTo); 1211179157Srrs asconf->whoTo = alt; 1212179157Srrs atomic_add_int(&alt->ref_count, 1); 1213179157Srrs } 1214171572Srrs /* See if an ECN Echo is also stranded */ 1215163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1216163953Srrs if ((chk->whoTo == net) && 1217163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1218163953Srrs sctp_free_remote_addr(chk->whoTo); 1219163953Srrs chk->whoTo = alt; 1220163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1221163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1222163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1223163953Srrs } 1224163953Srrs atomic_add_int(&alt->ref_count, 1); 1225163953Srrs } 1226163953Srrs } 1227216822Stuexen TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) { 1228179157Srrs if (chk->whoTo != alt) { 1229179157Srrs sctp_free_remote_addr(chk->whoTo); 1230179157Srrs chk->whoTo = alt; 1231179157Srrs atomic_add_int(&alt->ref_count, 1); 1232179157Srrs } 1233179157Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1234179157Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1235179157Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1236179157Srrs } 1237224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1238163953Srrs /* 1239163953Srrs * If the address went un-reachable, we need to move 1240171572Srrs * to the alternate for ALL chunks in queue 1241163953Srrs */ 1242212712Stuexen sctp_move_chunks_from_net(stcb, net); 1243163953Srrs } 1244163953Srrs /* mark the retran info */ 1245163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 1246163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1247163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 1248179157Srrs 1249179157Srrs /* send another ASCONF if any and we can do */ 1250179157Srrs sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1251163953Srrs } 1252163953Srrs return (0); 1253163953Srrs} 1254163953Srrs 1255172091Srrs/* Mobility adaptation */ 1256172156Srrsvoid 1257172091Srrssctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1258228653Stuexen struct sctp_nets *net SCTP_UNUSED) 1259172091Srrs{ 1260172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1261172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1262172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1263172156Srrs return; 1264172091Srrs } 1265172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1266172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1267172091Srrs sctp_free_remote_addr(stcb->asoc.deleted_primary); 1268172091Srrs stcb->asoc.deleted_primary = NULL; 1269172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1270172156Srrs return; 1271172091Srrs} 1272172091Srrs 1273163953Srrs/* 1274163953Srrs * For the shutdown and shutdown-ack, we do not keep one around on the 1275163953Srrs * control queue. This means we must generate a new one and call the general 1276163953Srrs * chunk output routine, AFTER having done threshold management. 1277214928Stuexen * It is assumed that net is non-NULL. 1278163953Srrs */ 1279163953Srrsint 1280163953Srrssctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1281163953Srrs struct sctp_nets *net) 1282163953Srrs{ 1283163953Srrs struct sctp_nets *alt; 1284163953Srrs 1285163953Srrs /* first threshold managment */ 1286163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1287163953Srrs /* Assoc is over */ 1288163953Srrs return (1); 1289163953Srrs } 1290214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1291163953Srrs /* second select an alternative */ 1292163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1293163953Srrs 1294163953Srrs /* third generate a shutdown into the queue for out net */ 1295214928Stuexen sctp_send_shutdown(stcb, alt); 1296214928Stuexen 1297163953Srrs /* fourth restart timer */ 1298163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1299163953Srrs return (0); 1300163953Srrs} 1301163953Srrs 1302163953Srrsint 1303163953Srrssctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1304163953Srrs struct sctp_nets *net) 1305163953Srrs{ 1306163953Srrs struct sctp_nets *alt; 1307163953Srrs 1308163953Srrs /* first threshold managment */ 1309163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1310163953Srrs /* Assoc is over */ 1311163953Srrs return (1); 1312163953Srrs } 1313214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1314163953Srrs /* second select an alternative */ 1315163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1316163953Srrs 1317163953Srrs /* third generate a shutdown into the queue for out net */ 1318163953Srrs sctp_send_shutdown_ack(stcb, alt); 1319163953Srrs 1320163953Srrs /* fourth restart timer */ 1321163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1322163953Srrs return (0); 1323163953Srrs} 1324163953Srrs 1325163953Srrsstatic void 1326163953Srrssctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1327163953Srrs struct sctp_tcb *stcb) 1328163953Srrs{ 1329163953Srrs struct sctp_stream_queue_pending *sp; 1330217760Stuexen unsigned int i, chks_in_queue = 0; 1331163953Srrs int being_filled = 0; 1332163953Srrs 1333163953Srrs /* 1334163953Srrs * This function is ONLY called when the send/sent queues are empty. 1335163953Srrs */ 1336163953Srrs if ((stcb == NULL) || (inp == NULL)) 1337163953Srrs return; 1338163953Srrs 1339163953Srrs if (stcb->asoc.sent_queue_retran_cnt) { 1340169420Srrs SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1341163953Srrs stcb->asoc.sent_queue_retran_cnt); 1342163953Srrs stcb->asoc.sent_queue_retran_cnt = 0; 1343163953Srrs } 1344217760Stuexen if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1345218241Stuexen /* No stream scheduler information, initialize scheduler */ 1346218241Stuexen stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0); 1347218241Stuexen if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1348218241Stuexen /* yep, we lost a stream or two */ 1349218241Stuexen SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n"); 1350163953Srrs } else { 1351218241Stuexen /* no streams lost */ 1352163953Srrs stcb->asoc.total_output_queue_size = 0; 1353163953Srrs } 1354163953Srrs } 1355163953Srrs /* Check to see if some data queued, if so report it */ 1356217760Stuexen for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1357217760Stuexen if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1358217760Stuexen TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 1359163953Srrs if (sp->msg_is_complete) 1360163953Srrs being_filled++; 1361163953Srrs chks_in_queue++; 1362163953Srrs } 1363163953Srrs } 1364163953Srrs } 1365163953Srrs if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1366169420Srrs SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1367163953Srrs stcb->asoc.stream_queue_cnt, chks_in_queue); 1368163953Srrs } 1369163953Srrs if (chks_in_queue) { 1370163953Srrs /* call the output queue function */ 1371172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1372163953Srrs if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1373163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1374163953Srrs /* 1375163953Srrs * Probably should go in and make it go back through 1376163953Srrs * and add fragments allowed 1377163953Srrs */ 1378163953Srrs if (being_filled == 0) { 1379169420Srrs SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1380163953Srrs chks_in_queue); 1381163953Srrs } 1382163953Srrs } 1383163953Srrs } else { 1384169420Srrs SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1385163953Srrs (u_long)stcb->asoc.total_output_queue_size); 1386163953Srrs stcb->asoc.total_output_queue_size = 0; 1387163953Srrs } 1388163953Srrs} 1389163953Srrs 1390163953Srrsint 1391163953Srrssctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1392224641Stuexen struct sctp_nets *net) 1393163953Srrs{ 1394224641Stuexen uint8_t net_was_pf; 1395171440Srrs 1396228907Stuexen if (net->dest_state & SCTP_ADDR_PF) { 1397228907Stuexen net_was_pf = 1; 1398228907Stuexen } else { 1399228907Stuexen net_was_pf = 0; 1400228907Stuexen } 1401228907Stuexen if (net->hb_responded == 0) { 1402228907Stuexen if (net->ro._s_addr) { 1403228907Stuexen /* 1404228907Stuexen * Invalidate the src address if we did not get a 1405228907Stuexen * response last time. 1406228907Stuexen */ 1407228907Stuexen sctp_free_ifa(net->ro._s_addr); 1408228907Stuexen net->ro._s_addr = NULL; 1409228907Stuexen net->src_addr_selected = 0; 1410224641Stuexen } 1411228907Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1412228907Stuexen if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1413228907Stuexen /* Assoc is over */ 1414228907Stuexen return (1); 1415163953Srrs } 1416163953Srrs } 1417228907Stuexen /* Zero PBA, if it needs it */ 1418228907Stuexen if (net->partial_bytes_acked) { 1419228907Stuexen net->partial_bytes_acked = 0; 1420228907Stuexen } 1421163953Srrs if ((stcb->asoc.total_output_queue_size > 0) && 1422163953Srrs (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1423163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1424163953Srrs sctp_audit_stream_queues_for_size(inp, stcb); 1425163953Srrs } 1426224641Stuexen if (!(net->dest_state & SCTP_ADDR_NOHB) && 1427224641Stuexen !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) { 1428163953Srrs /* 1429224641Stuexen * when move to PF during threshold mangement, a HB has been 1430224641Stuexen * queued in that routine 1431163953Srrs */ 1432234296Stuexen uint32_t ms_gone_by; 1433234296Stuexen 1434234296Stuexen if ((net->last_sent_time.tv_sec > 0) || 1435234296Stuexen (net->last_sent_time.tv_usec > 0)) { 1436234296Stuexen struct timeval diff; 1437234296Stuexen 1438234296Stuexen SCTP_GETTIME_TIMEVAL(&diff); 1439234296Stuexen timevalsub(&diff, &net->last_sent_time); 1440234296Stuexen ms_gone_by = (uint32_t) (diff.tv_sec * 1000) + 1441234296Stuexen (uint32_t) (diff.tv_usec / 1000); 1442234296Stuexen } else { 1443234296Stuexen ms_gone_by = 0xffffffff; 1444234296Stuexen } 1445234297Stuexen if ((ms_gone_by >= net->heart_beat_delay) || 1446234297Stuexen (net->dest_state & SCTP_ADDR_PF)) { 1447234296Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 1448234296Stuexen } 1449163953Srrs } 1450163953Srrs return (0); 1451163953Srrs} 1452163953Srrs 1453163953Srrsvoid 1454163953Srrssctp_pathmtu_timer(struct sctp_inpcb *inp, 1455163953Srrs struct sctp_tcb *stcb, 1456163953Srrs struct sctp_nets *net) 1457163953Srrs{ 1458179157Srrs uint32_t next_mtu, mtu; 1459163953Srrs 1460228653Stuexen next_mtu = sctp_get_next_mtu(net->mtu); 1461169352Srrs 1462179157Srrs if ((next_mtu > net->mtu) && (net->port == 0)) { 1463169352Srrs if ((net->src_addr_selected == 0) || 1464169352Srrs (net->ro._s_addr == NULL) || 1465169352Srrs (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1466169420Srrs if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1467169352Srrs sctp_free_ifa(net->ro._s_addr); 1468169352Srrs net->ro._s_addr = NULL; 1469169352Srrs net->src_addr_selected = 0; 1470169420Srrs } else if (net->ro._s_addr == NULL) { 1471179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1472179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1473179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1474179157Srrs 1475179157Srrs /* KAME hack: embed scopeid */ 1476197288Srrs (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 1477179157Srrs } 1478179157Srrs#endif 1479179157Srrs 1480169420Srrs net->ro._s_addr = sctp_source_address_selection(inp, 1481169420Srrs stcb, 1482169420Srrs (sctp_route_t *) & net->ro, 1483169420Srrs net, 0, stcb->asoc.vrf_id); 1484179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1485179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1486179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1487179157Srrs 1488179157Srrs (void)sa6_recoverscope(sin6); 1489179157Srrs } 1490179157Srrs#endif /* INET6 */ 1491169352Srrs } 1492169352Srrs if (net->ro._s_addr) 1493169352Srrs net->src_addr_selected = 1; 1494169352Srrs } 1495169352Srrs if (net->ro._s_addr) { 1496169352Srrs mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); 1497270350Stuexen#if defined(INET) || defined(INET6) 1498185694Srrs if (net->port) { 1499185694Srrs mtu -= sizeof(struct udphdr); 1500185694Srrs } 1501270350Stuexen#endif 1502169352Srrs if (mtu > next_mtu) { 1503163953Srrs net->mtu = next_mtu; 1504294148Stuexen } else { 1505294148Stuexen net->mtu = mtu; 1506163953Srrs } 1507163953Srrs } 1508163953Srrs } 1509163953Srrs /* restart the timer */ 1510163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 1511163953Srrs} 1512163953Srrs 1513163953Srrsvoid 1514163953Srrssctp_autoclose_timer(struct sctp_inpcb *inp, 1515163953Srrs struct sctp_tcb *stcb, 1516163953Srrs struct sctp_nets *net) 1517163953Srrs{ 1518163953Srrs struct timeval tn, *tim_touse; 1519163953Srrs struct sctp_association *asoc; 1520163953Srrs int ticks_gone_by; 1521163953Srrs 1522169378Srrs (void)SCTP_GETTIME_TIMEVAL(&tn); 1523163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1524163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1525163953Srrs /* Auto close is on */ 1526163953Srrs asoc = &stcb->asoc; 1527163953Srrs /* pick the time to use */ 1528163953Srrs if (asoc->time_last_rcvd.tv_sec > 1529163953Srrs asoc->time_last_sent.tv_sec) { 1530163953Srrs tim_touse = &asoc->time_last_rcvd; 1531163953Srrs } else { 1532163953Srrs tim_touse = &asoc->time_last_sent; 1533163953Srrs } 1534163953Srrs /* Now has long enough transpired to autoclose? */ 1535163953Srrs ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec); 1536163953Srrs if ((ticks_gone_by > 0) && 1537163953Srrs (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) { 1538163953Srrs /* 1539163953Srrs * autoclose time has hit, call the output routine, 1540163953Srrs * which should do nothing just to be SURE we don't 1541163953Srrs * have hanging data. We can then safely check the 1542163953Srrs * queues and know that we are clear to send 1543163953Srrs * shutdown 1544163953Srrs */ 1545172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); 1546163953Srrs /* Are we clean? */ 1547163953Srrs if (TAILQ_EMPTY(&asoc->send_queue) && 1548163953Srrs TAILQ_EMPTY(&asoc->sent_queue)) { 1549163953Srrs /* 1550163953Srrs * there is nothing queued to send, so I'm 1551163953Srrs * done... 1552163953Srrs */ 1553166675Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1554163953Srrs /* only send SHUTDOWN 1st time thru */ 1555224641Stuexen struct sctp_nets *netp; 1556224641Stuexen 1557246588Stuexen if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 1558246588Stuexen (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 1559246588Stuexen SCTP_STAT_DECR_GAUGE32(sctps_currestab); 1560246588Stuexen } 1561246588Stuexen SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 1562246588Stuexen SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 1563246588Stuexen sctp_stop_timers_for_shutdown(stcb); 1564224641Stuexen if (stcb->asoc.alternate) { 1565224641Stuexen netp = stcb->asoc.alternate; 1566224641Stuexen } else { 1567224641Stuexen netp = stcb->asoc.primary_destination; 1568224641Stuexen } 1569224641Stuexen sctp_send_shutdown(stcb, netp); 1570163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 1571163953Srrs stcb->sctp_ep, stcb, 1572224641Stuexen netp); 1573163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1574163953Srrs stcb->sctp_ep, stcb, 1575224641Stuexen netp); 1576163953Srrs } 1577163953Srrs } 1578163953Srrs } else { 1579163953Srrs /* 1580163953Srrs * No auto close at this time, reset t-o to check 1581163953Srrs * later 1582163953Srrs */ 1583163953Srrs int tmp; 1584163953Srrs 1585163953Srrs /* fool the timer startup to use the time left */ 1586163953Srrs tmp = asoc->sctp_autoclose_ticks; 1587163953Srrs asoc->sctp_autoclose_ticks -= ticks_gone_by; 1588163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1589163953Srrs net); 1590163953Srrs /* restore the real tick value */ 1591163953Srrs asoc->sctp_autoclose_ticks = tmp; 1592163953Srrs } 1593163953Srrs } 1594163953Srrs} 1595