sctp_timer.c revision 234793
1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3218319Srrs * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4218319Srrs * Copyright (c) 2008-2011, 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, 10231038Stuexen * 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 14231038Stuexen * 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/* $KAME: sctp_timer.c,v 1.29 2005/03/06 16:04:18 itojun Exp $ */ 34163953Srrs 35163953Srrs#include <sys/cdefs.h> 36163953Srrs__FBSDID("$FreeBSD: stable/9/sys/netinet/sctp_timer.c 234793 2012-04-29 16:16:31Z tuexen $"); 37163953Srrs 38163953Srrs#define _IP_VHL 39166086Srrs#include <netinet/sctp_os.h> 40163953Srrs#include <netinet/sctp_pcb.h> 41163953Srrs#ifdef INET6 42163953Srrs#endif 43163953Srrs#include <netinet/sctp_var.h> 44167598Srrs#include <netinet/sctp_sysctl.h> 45163953Srrs#include <netinet/sctp_timer.h> 46163953Srrs#include <netinet/sctputil.h> 47163953Srrs#include <netinet/sctp_output.h> 48163953Srrs#include <netinet/sctp_header.h> 49163953Srrs#include <netinet/sctp_indata.h> 50163953Srrs#include <netinet/sctp_asconf.h> 51163953Srrs#include <netinet/sctp_input.h> 52163953Srrs#include <netinet/sctp.h> 53163953Srrs#include <netinet/sctp_uio.h> 54185694Srrs#include <netinet/udp.h> 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", 95169420Srrs 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, 104163953Srrs stcb, 105163953Srrs SCTP_FAILED_THRESHOLD, 106172090Srrs (void *)net, SCTP_SO_NOT_LOCKED); 107163953Srrs } 108224641Stuexen } else if ((net->pf_threshold < net->failure_threshold) && 109224641Stuexen (net->error_count > net->pf_threshold)) { 110224641Stuexen if (!(net->dest_state & SCTP_ADDR_PF)) { 111224641Stuexen net->dest_state |= SCTP_ADDR_PF; 112224641Stuexen net->last_active = sctp_get_tick_count(); 113224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 114224641Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_TIMER + SCTP_LOC_3); 115224641Stuexen sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net); 116224641Stuexen } 117163953Srrs } 118163953Srrs } 119163953Srrs if (stcb == NULL) 120163953Srrs return (0); 121163953Srrs 122163953Srrs if (net) { 123163953Srrs if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { 124179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 125171943Srrs sctp_misc_ints(SCTP_THRESHOLD_INCR, 126171943Srrs stcb->asoc.overall_error_count, 127171943Srrs (stcb->asoc.overall_error_count + 1), 128171943Srrs SCTP_FROM_SCTP_TIMER, 129171943Srrs __LINE__); 130171943Srrs } 131163953Srrs stcb->asoc.overall_error_count++; 132163953Srrs } 133163953Srrs } else { 134179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 135171943Srrs sctp_misc_ints(SCTP_THRESHOLD_INCR, 136171943Srrs stcb->asoc.overall_error_count, 137171943Srrs (stcb->asoc.overall_error_count + 1), 138171943Srrs SCTP_FROM_SCTP_TIMER, 139171943Srrs __LINE__); 140171943Srrs } 141163953Srrs stcb->asoc.overall_error_count++; 142163953Srrs } 143169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n", 144169420Srrs &stcb->asoc, stcb->asoc.overall_error_count, 145169420Srrs (uint32_t) threshold, 146169420Srrs ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state)); 147163953Srrs /* 148163953Srrs * We specifically do not do >= to give the assoc one more change 149163953Srrs * before we fail it. 150163953Srrs */ 151163953Srrs if (stcb->asoc.overall_error_count > threshold) { 152163953Srrs /* Abort notification sends a ULP notify */ 153163953Srrs struct mbuf *oper; 154163953Srrs 155163953Srrs oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 156163953Srrs 0, M_DONTWAIT, 1, MT_DATA); 157163953Srrs if (oper) { 158163953Srrs struct sctp_paramhdr *ph; 159163953Srrs uint32_t *ippp; 160163953Srrs 161165647Srrs SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) + 162163953Srrs sizeof(uint32_t); 163163953Srrs ph = mtod(oper, struct sctp_paramhdr *); 164163953Srrs ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 165165647Srrs ph->param_length = htons(SCTP_BUF_LEN(oper)); 166163953Srrs ippp = (uint32_t *) (ph + 1); 167165220Srrs *ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); 168163953Srrs } 169165220Srrs inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1; 170172090Srrs sctp_abort_an_association(inp, stcb, SCTP_FAILED_THRESHOLD, oper, SCTP_SO_NOT_LOCKED); 171163953Srrs return (1); 172163953Srrs } 173163953Srrs return (0); 174163953Srrs} 175163953Srrs 176214928Stuexen/* 177214928Stuexen * sctp_find_alternate_net() returns a non-NULL pointer as long 178214928Stuexen * the argument net is non-NULL. 179214928Stuexen */ 180163953Srrsstruct sctp_nets * 181163953Srrssctp_find_alternate_net(struct sctp_tcb *stcb, 182163953Srrs struct sctp_nets *net, 183171440Srrs int mode) 184163953Srrs{ 185163953Srrs /* Find and return an alternate network if possible */ 186171440Srrs struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL; 187163953Srrs int once; 188163953Srrs 189171440Srrs /* JRS 5/14/07 - Initialize min_errors to an impossible value. */ 190171440Srrs int min_errors = -1; 191171440Srrs uint32_t max_cwnd = 0; 192171440Srrs 193163953Srrs if (stcb->asoc.numnets == 1) { 194163953Srrs /* No others but net */ 195163953Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 196163953Srrs } 197171440Srrs /* 198171440Srrs * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate 199171440Srrs * net algorithm. This algorithm chooses the active destination (not 200171440Srrs * in PF state) with the largest cwnd value. If all destinations are 201171440Srrs * in PF state, unreachable, or unconfirmed, choose the desination 202171440Srrs * that is in PF state with the lowest error count. In case of a 203171440Srrs * tie, choose the destination that was most recently active. 204171440Srrs */ 205171440Srrs if (mode == 2) { 206163953Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 207171440Srrs /* 208171440Srrs * JRS 5/14/07 - If the destination is unreachable 209171440Srrs * or unconfirmed, skip it. 210171440Srrs */ 211163953Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 212171440Srrs (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 213171440Srrs continue; 214171440Srrs } 215171440Srrs /* 216171440Srrs * JRS 5/14/07 - If the destination is reachable 217171440Srrs * but in PF state, compare the error count of the 218171440Srrs * destination to the minimum error count seen thus 219171440Srrs * far. Store the destination with the lower error 220171440Srrs * count. If the error counts are equal, store the 221171440Srrs * destination that was most recently active. 222171440Srrs */ 223171440Srrs if (mnet->dest_state & SCTP_ADDR_PF) { 224171440Srrs /* 225171440Srrs * JRS 5/14/07 - If the destination under 226171440Srrs * consideration is the current destination, 227171440Srrs * work as if the error count is one higher. 228171440Srrs * The actual error count will not be 229171440Srrs * incremented until later in the t3 230171440Srrs * handler. 231171440Srrs */ 232171440Srrs if (mnet == net) { 233171440Srrs if (min_errors == -1) { 234171440Srrs min_errors = mnet->error_count + 1; 235171440Srrs min_errors_net = mnet; 236171440Srrs } else if (mnet->error_count + 1 < min_errors) { 237171440Srrs min_errors = mnet->error_count + 1; 238171440Srrs min_errors_net = mnet; 239171440Srrs } else if (mnet->error_count + 1 == min_errors 240171440Srrs && mnet->last_active > min_errors_net->last_active) { 241171440Srrs min_errors_net = mnet; 242171440Srrs min_errors = mnet->error_count + 1; 243171440Srrs } 244171440Srrs continue; 245171440Srrs } else { 246171440Srrs if (min_errors == -1) { 247171440Srrs min_errors = mnet->error_count; 248171440Srrs min_errors_net = mnet; 249171440Srrs } else if (mnet->error_count < min_errors) { 250171440Srrs min_errors = mnet->error_count; 251171440Srrs min_errors_net = mnet; 252171440Srrs } else if (mnet->error_count == min_errors 253171440Srrs && mnet->last_active > min_errors_net->last_active) { 254171440Srrs min_errors_net = mnet; 255171440Srrs min_errors = mnet->error_count; 256171440Srrs } 257171440Srrs continue; 258171440Srrs } 259171440Srrs } 260171440Srrs /* 261171440Srrs * JRS 5/14/07 - If the destination is reachable and 262171440Srrs * not in PF state, compare the cwnd of the 263171440Srrs * destination to the highest cwnd seen thus far. 264171440Srrs * Store the destination with the higher cwnd value. 265171440Srrs * If the cwnd values are equal, randomly choose one 266171440Srrs * of the two destinations. 267171440Srrs */ 268171440Srrs if (max_cwnd < mnet->cwnd) { 269171440Srrs max_cwnd_net = mnet; 270171440Srrs max_cwnd = mnet->cwnd; 271171440Srrs } else if (max_cwnd == mnet->cwnd) { 272171440Srrs uint32_t rndval; 273171440Srrs uint8_t this_random; 274171440Srrs 275171440Srrs if (stcb->asoc.hb_random_idx > 3) { 276171440Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 277171440Srrs memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values)); 278171440Srrs this_random = stcb->asoc.hb_random_values[0]; 279171440Srrs stcb->asoc.hb_random_idx++; 280171440Srrs stcb->asoc.hb_ect_randombit = 0; 281171440Srrs } else { 282171440Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 283171440Srrs stcb->asoc.hb_random_idx++; 284171440Srrs stcb->asoc.hb_ect_randombit = 0; 285171440Srrs } 286171440Srrs if (this_random % 2 == 1) { 287171440Srrs max_cwnd_net = mnet; 288180387Srrs max_cwnd = mnet->cwnd; /* Useless? */ 289171440Srrs } 290171440Srrs } 291171440Srrs } 292171440Srrs if (max_cwnd_net == NULL) { 293171440Srrs if (min_errors_net == NULL) { 294171440Srrs return (net); 295171440Srrs } 296171440Srrs return (min_errors_net); 297171440Srrs } else { 298171440Srrs return (max_cwnd_net); 299171440Srrs } 300171440Srrs } 301171440Srrs /* 302171440Srrs * JRS 5/14/07 - If mode is set to 1, use the CMT policy for 303171440Srrs * choosing an alternate net. 304171440Srrs */ 305171440Srrs else if (mode == 1) { 306171440Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 307171440Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 308214928Stuexen (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 309163953Srrs /* 310163953Srrs * will skip ones that are not-reachable or 311163953Srrs * unconfirmed 312163953Srrs */ 313163953Srrs continue; 314163953Srrs } 315171440Srrs if (max_cwnd < mnet->cwnd) { 316171440Srrs max_cwnd_net = mnet; 317171440Srrs max_cwnd = mnet->cwnd; 318171440Srrs } else if (max_cwnd == mnet->cwnd) { 319163953Srrs uint32_t rndval; 320163953Srrs uint8_t this_random; 321163953Srrs 322163953Srrs if (stcb->asoc.hb_random_idx > 3) { 323163953Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 324163953Srrs memcpy(stcb->asoc.hb_random_values, &rndval, 325163953Srrs sizeof(stcb->asoc.hb_random_values)); 326163953Srrs this_random = stcb->asoc.hb_random_values[0]; 327163953Srrs stcb->asoc.hb_random_idx = 0; 328163953Srrs stcb->asoc.hb_ect_randombit = 0; 329163953Srrs } else { 330163953Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 331163953Srrs stcb->asoc.hb_random_idx++; 332163953Srrs stcb->asoc.hb_ect_randombit = 0; 333163953Srrs } 334163953Srrs if (this_random % 2) { 335171440Srrs max_cwnd_net = mnet; 336171440Srrs max_cwnd = mnet->cwnd; 337163953Srrs } 338163953Srrs } 339163953Srrs } 340171440Srrs if (max_cwnd_net) { 341171440Srrs return (max_cwnd_net); 342163953Srrs } 343163953Srrs } 344163953Srrs mnet = net; 345163953Srrs once = 0; 346163953Srrs 347163953Srrs if (mnet == NULL) { 348163953Srrs mnet = TAILQ_FIRST(&stcb->asoc.nets); 349212225Srrs if (mnet == NULL) { 350212225Srrs return (NULL); 351212225Srrs } 352163953Srrs } 353163953Srrs do { 354163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 355163953Srrs if (alt == NULL) { 356163953Srrs once++; 357163953Srrs if (once > 1) { 358163953Srrs break; 359163953Srrs } 360163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 361212225Srrs if (alt == NULL) { 362212225Srrs return (NULL); 363212225Srrs } 364163953Srrs } 365163953Srrs if (alt->ro.ro_rt == NULL) { 366167598Srrs if (alt->ro._s_addr) { 367167598Srrs sctp_free_ifa(alt->ro._s_addr); 368167598Srrs alt->ro._s_addr = NULL; 369167598Srrs } 370163953Srrs alt->src_addr_selected = 0; 371163953Srrs } 372214928Stuexen /* sa_ignore NO_NULL_CHK */ 373214928Stuexen if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && 374163953Srrs (alt->ro.ro_rt != NULL) && 375214928Stuexen (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) { 376163953Srrs /* Found a reachable address */ 377163953Srrs break; 378163953Srrs } 379163953Srrs mnet = alt; 380163953Srrs } while (alt != NULL); 381163953Srrs 382163953Srrs if (alt == NULL) { 383163953Srrs /* Case where NO insv network exists (dormant state) */ 384163953Srrs /* we rotate destinations */ 385163953Srrs once = 0; 386163953Srrs mnet = net; 387163953Srrs do { 388212225Srrs if (mnet == NULL) { 389212225Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 390212225Srrs } 391163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 392163953Srrs if (alt == NULL) { 393163953Srrs once++; 394163953Srrs if (once > 1) { 395163953Srrs break; 396163953Srrs } 397163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 398163953Srrs } 399169655Srrs /* sa_ignore NO_NULL_CHK */ 400163953Srrs if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) && 401163953Srrs (alt != net)) { 402163953Srrs /* Found an alternate address */ 403163953Srrs break; 404163953Srrs } 405163953Srrs mnet = alt; 406163953Srrs } while (alt != NULL); 407163953Srrs } 408163953Srrs if (alt == NULL) { 409163953Srrs return (net); 410163953Srrs } 411163953Srrs return (alt); 412163953Srrs} 413163953Srrs 414163953Srrsstatic void 415163953Srrssctp_backoff_on_timeout(struct sctp_tcb *stcb, 416163953Srrs struct sctp_nets *net, 417163953Srrs int win_probe, 418210599Srrs int num_marked, int num_abandoned) 419163953Srrs{ 420170642Srrs if (net->RTO == 0) { 421170642Srrs net->RTO = stcb->asoc.minrto; 422170642Srrs } 423163953Srrs net->RTO <<= 1; 424163953Srrs if (net->RTO > stcb->asoc.maxrto) { 425163953Srrs net->RTO = stcb->asoc.maxrto; 426163953Srrs } 427210599Srrs if ((win_probe == 0) && (num_marked || num_abandoned)) { 428163953Srrs /* We don't apply penalty to window probe scenarios */ 429171440Srrs /* JRS - Use the congestion control given in the CC module */ 430171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 431163953Srrs } 432163953Srrs} 433163953Srrs 434184333Srrs#ifndef INVARIANTS 435184333Srrsstatic void 436182367Srrssctp_recover_sent_list(struct sctp_tcb *stcb) 437182367Srrs{ 438216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 439182367Srrs struct sctp_association *asoc; 440182367Srrs 441182367Srrs asoc = &stcb->asoc; 442216822Stuexen TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 443216825Stuexen if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) { 444182367Srrs SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", 445216822Stuexen chk, chk->rec.data.TSN_seq, asoc->last_acked_seq); 446182367Srrs TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 447182367Srrs if (chk->pr_sctp_on) { 448182367Srrs if (asoc->pr_sctp_cnt != 0) 449182367Srrs asoc->pr_sctp_cnt--; 450182367Srrs } 451182367Srrs if (chk->data) { 452182367Srrs /* sa_ignore NO_NULL_CHK */ 453182367Srrs sctp_free_bufspace(stcb, asoc, chk, 1); 454182367Srrs sctp_m_freem(chk->data); 455216822Stuexen chk->data = NULL; 456196260Stuexen if (asoc->peer_supports_prsctp && PR_SCTP_BUF_ENABLED(chk->flags)) { 457182367Srrs asoc->sent_queue_cnt_removeable--; 458182367Srrs } 459182367Srrs } 460182367Srrs asoc->sent_queue_cnt--; 461221627Stuexen sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 462182367Srrs } 463182367Srrs } 464182367Srrs SCTP_PRINTF("after recover order is as follows\n"); 465216822Stuexen TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 466182367Srrs SCTP_PRINTF("chk:%p TSN:%x\n", chk, chk->rec.data.TSN_seq); 467182367Srrs } 468182367Srrs} 469182367Srrs 470184333Srrs#endif 471184333Srrs 472163953Srrsstatic int 473163953Srrssctp_mark_all_for_resend(struct sctp_tcb *stcb, 474163953Srrs struct sctp_nets *net, 475163953Srrs struct sctp_nets *alt, 476163953Srrs int window_probe, 477210599Srrs int *num_marked, 478210599Srrs int *num_abandoned) 479163953Srrs{ 480163953Srrs 481163953Srrs /* 482163953Srrs * Mark all chunks (well not all) that were sent to *net for 483163953Srrs * retransmission. Move them to alt for there destination as well... 484163953Srrs * We only mark chunks that have been outstanding long enough to 485163953Srrs * have received feed-back. 486163953Srrs */ 487216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 488163953Srrs struct sctp_nets *lnets; 489163953Srrs struct timeval now, min_wait, tv; 490219014Stuexen int cur_rto; 491210599Srrs int cnt_abandoned; 492168709Srrs int audit_tf, num_mk, fir; 493163953Srrs unsigned int cnt_mk; 494168709Srrs uint32_t orig_flight, orig_tf; 495163953Srrs uint32_t tsnlast, tsnfirst; 496182367Srrs int recovery_cnt = 0; 497163953Srrs 498171440Srrs 499163953Srrs /* none in flight now */ 500163953Srrs audit_tf = 0; 501163953Srrs fir = 0; 502163953Srrs /* 503163953Srrs * figure out how long a data chunk must be pending before we can 504163953Srrs * mark it .. 505163953Srrs */ 506169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 507163953Srrs /* get cur rto in micro-seconds */ 508219014Stuexen cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; 509219014Stuexen cur_rto *= 1000; 510224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 511219014Stuexen sctp_log_fr(cur_rto, 512170744Srrs stcb->asoc.peers_rwnd, 513170744Srrs window_probe, 514170744Srrs SCTP_FR_T3_MARK_TIME); 515224641Stuexen sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT); 516170744Srrs sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 517170744Srrs } 518219014Stuexen tv.tv_sec = cur_rto / 1000000; 519219014Stuexen tv.tv_usec = cur_rto % 1000000; 520163953Srrs min_wait = now; 521163953Srrs timevalsub(&min_wait, &tv); 522163953Srrs if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 523163953Srrs /* 524163953Srrs * if we hit here, we don't have enough seconds on the clock 525163953Srrs * to account for the RTO. We just let the lower seconds be 526163953Srrs * the bounds and don't worry about it. This may mean we 527163953Srrs * will mark a lot more than we should. 528163953Srrs */ 529163953Srrs min_wait.tv_sec = min_wait.tv_usec = 0; 530163953Srrs } 531224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 532219014Stuexen sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 533170744Srrs sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 534170744Srrs } 535163953Srrs /* 536163953Srrs * Our rwnd will be incorrect here since we are not adding back the 537163953Srrs * cnt * mbuf but we will fix that down below. 538163953Srrs */ 539163953Srrs orig_flight = net->flight_size; 540168709Srrs orig_tf = stcb->asoc.total_flight; 541168709Srrs 542163953Srrs net->fast_retran_ip = 0; 543163953Srrs /* Now on to each chunk */ 544210599Srrs cnt_abandoned = 0; 545163953Srrs num_mk = cnt_mk = 0; 546163953Srrs tsnfirst = tsnlast = 0; 547184333Srrs#ifndef INVARIANTS 548182367Srrsstart_again: 549184333Srrs#endif 550216822Stuexen TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) { 551216825Stuexen if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) { 552163953Srrs /* Strange case our list got out of order? */ 553182367Srrs SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x", 554182367Srrs (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq); 555182367Srrs recovery_cnt++; 556182367Srrs#ifdef INVARIANTS 557182367Srrs panic("last acked >= chk on sent-Q"); 558182367Srrs#else 559182367Srrs SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); 560182367Srrs sctp_recover_sent_list(stcb); 561182367Srrs if (recovery_cnt < 10) { 562182367Srrs goto start_again; 563182367Srrs } else { 564182367Srrs SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); 565182367Srrs } 566182367Srrs#endif 567163953Srrs } 568163953Srrs if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 569163953Srrs /* 570163953Srrs * found one to mark: If it is less than 571163953Srrs * DATAGRAM_ACKED it MUST not be a skipped or marked 572163953Srrs * TSN but instead one that is either already set 573163953Srrs * for retransmission OR one that needs 574163953Srrs * retransmission. 575163953Srrs */ 576163953Srrs 577163953Srrs /* validate its been outstanding long enough */ 578224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 579170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, 580170744Srrs chk->sent_rcv_time.tv_sec, 581170744Srrs chk->sent_rcv_time.tv_usec, 582170744Srrs SCTP_FR_T3_MARK_TIME); 583170744Srrs } 584163953Srrs if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 585163953Srrs /* 586163953Srrs * we have reached a chunk that was sent 587163953Srrs * some seconds past our min.. forget it we 588163953Srrs * will find no more to send. 589163953Srrs */ 590224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 591170744Srrs sctp_log_fr(0, 592170744Srrs chk->sent_rcv_time.tv_sec, 593170744Srrs chk->sent_rcv_time.tv_usec, 594170744Srrs SCTP_FR_T3_STOPPED); 595170744Srrs } 596163953Srrs continue; 597163953Srrs } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 598163953Srrs (window_probe == 0)) { 599163953Srrs /* 600163953Srrs * we must look at the micro seconds to 601163953Srrs * know. 602163953Srrs */ 603163953Srrs if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 604163953Srrs /* 605163953Srrs * ok it was sent after our boundary 606163953Srrs * time. 607163953Srrs */ 608163953Srrs continue; 609163953Srrs } 610163953Srrs } 611196260Stuexen if (stcb->asoc.peer_supports_prsctp && PR_SCTP_TTL_ENABLED(chk->flags)) { 612163953Srrs /* Is it expired? */ 613212801Stuexen if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { 614163953Srrs /* Yes so drop it */ 615163953Srrs if (chk->data) { 616169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 617163953Srrs chk, 618163953Srrs (SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT), 619189790Srrs SCTP_SO_NOT_LOCKED); 620210599Srrs cnt_abandoned++; 621163953Srrs } 622185694Srrs continue; 623163953Srrs } 624163953Srrs } 625196260Stuexen if (stcb->asoc.peer_supports_prsctp && PR_SCTP_RTX_ENABLED(chk->flags)) { 626163953Srrs /* Has it been retransmitted tv_sec times? */ 627163953Srrs if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 628163953Srrs if (chk->data) { 629169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 630163953Srrs chk, 631163953Srrs (SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT), 632189790Srrs SCTP_SO_NOT_LOCKED); 633210599Srrs cnt_abandoned++; 634163953Srrs } 635185694Srrs continue; 636163953Srrs } 637163953Srrs } 638168709Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 639163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 640163953Srrs num_mk++; 641163953Srrs if (fir == 0) { 642163953Srrs fir = 1; 643163953Srrs tsnfirst = chk->rec.data.TSN_seq; 644163953Srrs } 645163953Srrs tsnlast = chk->rec.data.TSN_seq; 646224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 647170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 648170744Srrs 0, SCTP_FR_T3_MARKED); 649170744Srrs } 650168709Srrs if (chk->rec.data.chunk_was_revoked) { 651168709Srrs /* deflate the cwnd */ 652168709Srrs chk->whoTo->cwnd -= chk->book_size; 653168709Srrs chk->rec.data.chunk_was_revoked = 0; 654168709Srrs } 655168709Srrs net->marked_retrans++; 656168709Srrs stcb->asoc.marked_retrans++; 657179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 658170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 659170744Srrs chk->whoTo->flight_size, 660170744Srrs chk->book_size, 661170744Srrs (uintptr_t) chk->whoTo, 662170744Srrs chk->rec.data.TSN_seq); 663170744Srrs } 664168709Srrs sctp_flight_size_decrease(chk); 665168709Srrs sctp_total_flight_decrease(stcb, chk); 666168709Srrs stcb->asoc.peers_rwnd += chk->send_size; 667179783Srrs stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 668163953Srrs } 669163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 670163953Srrs SCTP_STAT_INCR(sctps_markedretrans); 671165220Srrs 672163953Srrs /* reset the TSN for striking and other FR stuff */ 673163953Srrs chk->rec.data.doing_fast_retransmit = 0; 674163953Srrs /* Clear any time so NO RTT is being done */ 675219397Srrs 676219397Srrs if (chk->do_rtt) { 677219397Srrs if (chk->whoTo->rto_needed == 0) { 678219397Srrs chk->whoTo->rto_needed = 1; 679219397Srrs } 680219397Srrs } 681163953Srrs chk->do_rtt = 0; 682163953Srrs if (alt != net) { 683163953Srrs sctp_free_remote_addr(chk->whoTo); 684163953Srrs chk->no_fr_allowed = 1; 685163953Srrs chk->whoTo = alt; 686163953Srrs atomic_add_int(&alt->ref_count, 1); 687163953Srrs } else { 688163953Srrs chk->no_fr_allowed = 0; 689163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 690163953Srrs chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 691163953Srrs } else { 692163953Srrs chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 693163953Srrs } 694163953Srrs } 695170181Srrs /* 696170181Srrs * CMT: Do not allow FRs on retransmitted TSNs. 697170181Srrs */ 698216669Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 699163953Srrs chk->no_fr_allowed = 1; 700163953Srrs } 701210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 702163953Srrs } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 703163953Srrs /* remember highest acked one */ 704163953Srrs could_be_sent = chk; 705210599Srrs#endif 706163953Srrs } 707163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 708163953Srrs cnt_mk++; 709163953Srrs } 710163953Srrs } 711168709Srrs if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 712168709Srrs /* we did not subtract the same things? */ 713168709Srrs audit_tf = 1; 714168709Srrs } 715224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 716170744Srrs sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 717170744Srrs } 718163953Srrs#ifdef SCTP_DEBUG 719169420Srrs if (num_mk) { 720169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 721169420Srrs tsnlast); 722169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n", 723169420Srrs num_mk, (u_long)stcb->asoc.peers_rwnd); 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:%d\n", 727169420Srrs num_mk, 728169420Srrs (int)stcb->asoc.peers_rwnd); 729163953Srrs } 730163953Srrs#endif 731163953Srrs *num_marked = num_mk; 732210599Srrs *num_abandoned = cnt_abandoned; 733210493Srrs /* 734210493Srrs * Now check for a ECN Echo that may be stranded And include the 735210493Srrs * cnt_mk'd to have all resends in the control queue. 736210493Srrs */ 737210493Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 738210493Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 739210493Srrs cnt_mk++; 740210493Srrs } 741210493Srrs if ((chk->whoTo == net) && 742210493Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 743210493Srrs sctp_free_remote_addr(chk->whoTo); 744210493Srrs chk->whoTo = alt; 745210493Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 746210493Srrs chk->sent = SCTP_DATAGRAM_RESEND; 747210493Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 748210493Srrs cnt_mk++; 749210493Srrs } 750210493Srrs atomic_add_int(&alt->ref_count, 1); 751210493Srrs } 752210493Srrs } 753210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 754163953Srrs if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 755163953Srrs /* fix it so we retransmit the highest acked anyway */ 756163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 757163953Srrs cnt_mk++; 758163953Srrs could_be_sent->sent = SCTP_DATAGRAM_RESEND; 759163953Srrs } 760210599Srrs#endif 761163953Srrs if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 762165220Srrs#ifdef INVARIANTS 763171477Srrs SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 764171477Srrs cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 765163953Srrs#endif 766163953Srrs#ifndef SCTP_AUDITING_ENABLED 767163953Srrs stcb->asoc.sent_queue_retran_cnt = cnt_mk; 768163953Srrs#endif 769163953Srrs } 770163953Srrs if (audit_tf) { 771169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 772169420Srrs "Audit total flight due to negative value net:%p\n", 773169420Srrs net); 774163953Srrs stcb->asoc.total_flight = 0; 775163953Srrs stcb->asoc.total_flight_count = 0; 776163953Srrs /* Clear all networks flight size */ 777163953Srrs TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 778163953Srrs lnets->flight_size = 0; 779169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 780169420Srrs "Net:%p c-f cwnd:%d ssthresh:%d\n", 781169420Srrs lnets, lnets->cwnd, lnets->ssthresh); 782163953Srrs } 783163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 784163953Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 785179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 786170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 787170744Srrs chk->whoTo->flight_size, 788170744Srrs chk->book_size, 789170744Srrs (uintptr_t) chk->whoTo, 790170744Srrs chk->rec.data.TSN_seq); 791170744Srrs } 792168709Srrs sctp_flight_size_increase(chk); 793168709Srrs sctp_total_flight_increase(stcb, chk); 794163953Srrs } 795163953Srrs } 796163953Srrs } 797163953Srrs /* We return 1 if we only have a window probe outstanding */ 798163953Srrs return (0); 799163953Srrs} 800163953Srrs 801163953Srrs 802163953Srrsint 803163953Srrssctp_t3rxt_timer(struct sctp_inpcb *inp, 804163953Srrs struct sctp_tcb *stcb, 805163953Srrs struct sctp_nets *net) 806163953Srrs{ 807163953Srrs struct sctp_nets *alt; 808210599Srrs int win_probe, num_mk, num_abandoned; 809163953Srrs 810179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 811170744Srrs sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 812170744Srrs } 813179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 814163953Srrs struct sctp_nets *lnet; 815163953Srrs 816163953Srrs TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 817163953Srrs if (net == lnet) { 818163953Srrs sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 819163953Srrs } else { 820163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 821163953Srrs } 822163953Srrs } 823163953Srrs } 824163953Srrs /* Find an alternate and mark those for retransmission */ 825163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 826163953Srrs (stcb->asoc.total_flight < net->mtu)) { 827163953Srrs SCTP_STAT_INCR(sctps_timowindowprobe); 828163953Srrs win_probe = 1; 829163953Srrs } else { 830163953Srrs win_probe = 0; 831163953Srrs } 832168709Srrs 833163953Srrs if (win_probe == 0) { 834163953Srrs /* We don't do normal threshold management on window probes */ 835163953Srrs if (sctp_threshold_management(inp, stcb, net, 836163953Srrs stcb->asoc.max_send_times)) { 837163953Srrs /* Association was destroyed */ 838163953Srrs return (1); 839163953Srrs } else { 840163953Srrs if (net != stcb->asoc.primary_destination) { 841163953Srrs /* send a immediate HB if our RTO is stale */ 842163953Srrs struct timeval now; 843163953Srrs unsigned int ms_goneby; 844163953Srrs 845169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 846163953Srrs if (net->last_sent_time.tv_sec) { 847163953Srrs ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 848163953Srrs } else { 849163953Srrs ms_goneby = 0; 850163953Srrs } 851224641Stuexen if ((net->dest_state & SCTP_ADDR_PF) == 0) { 852224641Stuexen if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 853185694Srrs /* 854224641Stuexen * no recent feed back in an 855224641Stuexen * RTO or more, request a 856224641Stuexen * RTT update 857185694Srrs */ 858224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 859224641Stuexen } 860163953Srrs } 861163953Srrs } 862163953Srrs } 863163953Srrs } else { 864163953Srrs /* 865163953Srrs * For a window probe we don't penalize the net's but only 866163953Srrs * the association. This may fail it if SACKs are not coming 867163953Srrs * back. If sack's are coming with rwnd locked at 0, we will 868163953Srrs * continue to hold things waiting for rwnd to raise 869163953Srrs */ 870163953Srrs if (sctp_threshold_management(inp, stcb, NULL, 871163953Srrs stcb->asoc.max_send_times)) { 872163953Srrs /* Association was destroyed */ 873163953Srrs return (1); 874163953Srrs } 875163953Srrs } 876224641Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 877224641Stuexen if (net->pf_threshold < net->failure_threshold) { 878224641Stuexen alt = sctp_find_alternate_net(stcb, net, 2); 879224641Stuexen } else { 880224641Stuexen /* 881224641Stuexen * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is 882224641Stuexen * being used, then pick dest with largest ssthresh 883224641Stuexen * for any retransmission. 884224641Stuexen */ 885224641Stuexen alt = sctp_find_alternate_net(stcb, net, 1); 886224641Stuexen /* 887224641Stuexen * CUCv2: If a different dest is picked for the 888224641Stuexen * retransmission, then new (rtx-)pseudo_cumack 889224641Stuexen * needs to be tracked for orig dest. Let CUCv2 890224641Stuexen * track new (rtx-) pseudo-cumack always. 891224641Stuexen */ 892224641Stuexen net->find_pseudo_cumack = 1; 893224641Stuexen net->find_rtx_pseudo_cumack = 1; 894224641Stuexen } 895224641Stuexen } else { 896224641Stuexen alt = sctp_find_alternate_net(stcb, net, 0); 897224641Stuexen } 898224641Stuexen 899224641Stuexen num_mk = 0; 900224641Stuexen num_abandoned = 0; 901224641Stuexen (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, 902224641Stuexen &num_mk, &num_abandoned); 903224641Stuexen /* FR Loss recovery just ended with the T3. */ 904224641Stuexen stcb->asoc.fast_retran_loss_recovery = 0; 905224641Stuexen 906224641Stuexen /* CMT FR loss recovery ended with the T3 */ 907224641Stuexen net->fast_retran_loss_recovery = 0; 908224641Stuexen if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 909224641Stuexen (net->flight_size == 0)) { 910224641Stuexen (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 911224641Stuexen } 912224641Stuexen /* 913224641Stuexen * setup the sat loss recovery that prevents satellite cwnd advance. 914224641Stuexen */ 915224641Stuexen stcb->asoc.sat_t3_loss_recovery = 1; 916224641Stuexen stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 917224641Stuexen 918224641Stuexen /* Backoff the timer and cwnd */ 919224641Stuexen sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); 920224641Stuexen if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) || 921224641Stuexen (net->dest_state & SCTP_ADDR_PF)) { 922163953Srrs /* Move all pending over too */ 923212712Stuexen sctp_move_chunks_from_net(stcb, net); 924169352Srrs 925169352Srrs /* 926169352Srrs * Get the address that failed, to force a new src address 927169352Srrs * selecton and a route allocation. 928169352Srrs */ 929169352Srrs if (net->ro._s_addr) { 930169352Srrs sctp_free_ifa(net->ro._s_addr); 931169352Srrs net->ro._s_addr = NULL; 932169352Srrs } 933169352Srrs net->src_addr_selected = 0; 934169352Srrs 935169352Srrs /* Force a route allocation too */ 936169352Srrs if (net->ro.ro_rt) { 937169352Srrs RTFREE(net->ro.ro_rt); 938169352Srrs net->ro.ro_rt = NULL; 939169352Srrs } 940163953Srrs /* Was it our primary? */ 941163953Srrs if ((stcb->asoc.primary_destination == net) && (alt != net)) { 942163953Srrs /* 943163953Srrs * Yes, note it as such and find an alternate note: 944163953Srrs * this means HB code must use this to resent the 945163953Srrs * primary if it goes active AND if someone does a 946163953Srrs * change-primary then this flag must be cleared 947163953Srrs * from any net structures. 948163953Srrs */ 949224641Stuexen if (stcb->asoc.alternate) { 950224641Stuexen sctp_free_remote_addr(stcb->asoc.alternate); 951163953Srrs } 952224641Stuexen stcb->asoc.alternate = alt; 953224641Stuexen atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 954163953Srrs } 955163953Srrs } 956163953Srrs /* 957163953Srrs * Special case for cookie-echo'ed case, we don't do output but must 958163953Srrs * await the COOKIE-ACK before retransmission 959163953Srrs */ 960163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 961163953Srrs /* 962163953Srrs * Here we just reset the timer and start again since we 963163953Srrs * have not established the asoc 964163953Srrs */ 965163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 966163953Srrs return (0); 967163953Srrs } 968163953Srrs if (stcb->asoc.peer_supports_prsctp) { 969163953Srrs struct sctp_tmit_chunk *lchk; 970163953Srrs 971163953Srrs lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 972163953Srrs /* C3. See if we need to send a Fwd-TSN */ 973216825Stuexen if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { 974163953Srrs send_forward_tsn(stcb, &stcb->asoc); 975163953Srrs if (lchk) { 976163953Srrs /* Assure a timer is up */ 977163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 978163953Srrs } 979163953Srrs } 980163953Srrs } 981179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 982170744Srrs sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 983170744Srrs } 984163953Srrs return (0); 985163953Srrs} 986163953Srrs 987163953Srrsint 988163953Srrssctp_t1init_timer(struct sctp_inpcb *inp, 989163953Srrs struct sctp_tcb *stcb, 990163953Srrs struct sctp_nets *net) 991163953Srrs{ 992163953Srrs /* bump the thresholds */ 993163953Srrs if (stcb->asoc.delayed_connection) { 994163953Srrs /* 995163953Srrs * special hook for delayed connection. The library did NOT 996163953Srrs * complete the rest of its sends. 997163953Srrs */ 998163953Srrs stcb->asoc.delayed_connection = 0; 999172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1000163953Srrs return (0); 1001163953Srrs } 1002163953Srrs if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) { 1003163953Srrs return (0); 1004163953Srrs } 1005163953Srrs if (sctp_threshold_management(inp, stcb, net, 1006163953Srrs stcb->asoc.max_init_times)) { 1007163953Srrs /* Association was destroyed */ 1008163953Srrs return (1); 1009163953Srrs } 1010163953Srrs stcb->asoc.dropped_special_cnt = 0; 1011210599Srrs sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); 1012163953Srrs if (stcb->asoc.initial_init_rto_max < net->RTO) { 1013163953Srrs net->RTO = stcb->asoc.initial_init_rto_max; 1014163953Srrs } 1015163953Srrs if (stcb->asoc.numnets > 1) { 1016163953Srrs /* If we have more than one addr use it */ 1017163953Srrs struct sctp_nets *alt; 1018163953Srrs 1019163953Srrs alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1020214928Stuexen if (alt != stcb->asoc.primary_destination) { 1021212712Stuexen sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); 1022163953Srrs stcb->asoc.primary_destination = alt; 1023163953Srrs } 1024163953Srrs } 1025163953Srrs /* Send out a new init */ 1026172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1027163953Srrs return (0); 1028163953Srrs} 1029163953Srrs 1030163953Srrs/* 1031163953Srrs * For cookie and asconf we actually need to find and mark for resend, then 1032163953Srrs * increment the resend counter (after all the threshold management stuff of 1033163953Srrs * course). 1034163953Srrs */ 1035163953Srrsint 1036163953Srrssctp_cookie_timer(struct sctp_inpcb *inp, 1037163953Srrs struct sctp_tcb *stcb, 1038231038Stuexen struct sctp_nets *net SCTP_UNUSED) 1039163953Srrs{ 1040163953Srrs struct sctp_nets *alt; 1041163953Srrs struct sctp_tmit_chunk *cookie; 1042163953Srrs 1043163953Srrs /* first before all else we must find the cookie */ 1044163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1045163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1046163953Srrs break; 1047163953Srrs } 1048163953Srrs } 1049163953Srrs if (cookie == NULL) { 1050163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1051163953Srrs /* FOOBAR! */ 1052163953Srrs struct mbuf *oper; 1053163953Srrs 1054163953Srrs oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 1055163953Srrs 0, M_DONTWAIT, 1, MT_DATA); 1056163953Srrs if (oper) { 1057163953Srrs struct sctp_paramhdr *ph; 1058163953Srrs uint32_t *ippp; 1059163953Srrs 1060165647Srrs SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) + 1061163953Srrs sizeof(uint32_t); 1062163953Srrs ph = mtod(oper, struct sctp_paramhdr *); 1063163953Srrs ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 1064165647Srrs ph->param_length = htons(SCTP_BUF_LEN(oper)); 1065163953Srrs ippp = (uint32_t *) (ph + 1); 1066171440Srrs *ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_3); 1067163953Srrs } 1068171440Srrs inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_4; 1069163953Srrs sctp_abort_an_association(inp, stcb, SCTP_INTERNAL_ERROR, 1070172090Srrs oper, SCTP_SO_NOT_LOCKED); 1071163953Srrs } else { 1072165220Srrs#ifdef INVARIANTS 1073163953Srrs panic("Cookie timer expires in wrong state?"); 1074163953Srrs#else 1075169420Srrs SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc)); 1076163953Srrs return (0); 1077163953Srrs#endif 1078163953Srrs } 1079163953Srrs return (0); 1080163953Srrs } 1081163953Srrs /* Ok we found the cookie, threshold management next */ 1082163953Srrs if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1083163953Srrs stcb->asoc.max_init_times)) { 1084163953Srrs /* Assoc is over */ 1085163953Srrs return (1); 1086163953Srrs } 1087163953Srrs /* 1088163953Srrs * cleared theshold management now lets backoff the address & select 1089163953Srrs * an alternate 1090163953Srrs */ 1091163953Srrs stcb->asoc.dropped_special_cnt = 0; 1092210599Srrs sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); 1093163953Srrs alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1094163953Srrs if (alt != cookie->whoTo) { 1095163953Srrs sctp_free_remote_addr(cookie->whoTo); 1096163953Srrs cookie->whoTo = alt; 1097163953Srrs atomic_add_int(&alt->ref_count, 1); 1098163953Srrs } 1099163953Srrs /* Now mark the retran info */ 1100163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1101163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1102163953Srrs } 1103163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 1104163953Srrs /* 1105163953Srrs * Now call the output routine to kick out the cookie again, Note we 1106163953Srrs * don't mark any chunks for retran so that FR will need to kick in 1107163953Srrs * to move these (or a send timer). 1108163953Srrs */ 1109163953Srrs return (0); 1110163953Srrs} 1111163953Srrs 1112163953Srrsint 1113163953Srrssctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1114163953Srrs struct sctp_nets *net) 1115163953Srrs{ 1116163953Srrs struct sctp_nets *alt; 1117163953Srrs struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1118163953Srrs 1119163953Srrs if (stcb->asoc.stream_reset_outstanding == 0) { 1120163953Srrs return (0); 1121163953Srrs } 1122163953Srrs /* find the existing STRRESET, we use the seq number we sent out on */ 1123169420Srrs (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1124163953Srrs if (strrst == NULL) { 1125163953Srrs return (0); 1126163953Srrs } 1127163953Srrs /* do threshold management */ 1128163953Srrs if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1129163953Srrs stcb->asoc.max_send_times)) { 1130163953Srrs /* Assoc is over */ 1131163953Srrs return (1); 1132163953Srrs } 1133163953Srrs /* 1134163953Srrs * cleared theshold management now lets backoff the address & select 1135163953Srrs * an alternate 1136163953Srrs */ 1137210599Srrs sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0); 1138163953Srrs alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1139163953Srrs sctp_free_remote_addr(strrst->whoTo); 1140163953Srrs strrst->whoTo = alt; 1141163953Srrs atomic_add_int(&alt->ref_count, 1); 1142163953Srrs 1143163953Srrs /* See if a ECN Echo is also stranded */ 1144163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1145163953Srrs if ((chk->whoTo == net) && 1146163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1147163953Srrs sctp_free_remote_addr(chk->whoTo); 1148163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1149163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1150163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1151163953Srrs } 1152163953Srrs chk->whoTo = alt; 1153163953Srrs atomic_add_int(&alt->ref_count, 1); 1154163953Srrs } 1155163953Srrs } 1156224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1157163953Srrs /* 1158163953Srrs * If the address went un-reachable, we need to move to 1159163953Srrs * alternates for ALL chk's in queue 1160163953Srrs */ 1161212712Stuexen sctp_move_chunks_from_net(stcb, net); 1162163953Srrs } 1163163953Srrs /* mark the retran info */ 1164163953Srrs if (strrst->sent != SCTP_DATAGRAM_RESEND) 1165163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1166163953Srrs strrst->sent = SCTP_DATAGRAM_RESEND; 1167163953Srrs 1168163953Srrs /* restart the timer */ 1169163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1170163953Srrs return (0); 1171163953Srrs} 1172163953Srrs 1173163953Srrsint 1174163953Srrssctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1175163953Srrs struct sctp_nets *net) 1176163953Srrs{ 1177163953Srrs struct sctp_nets *alt; 1178216822Stuexen struct sctp_tmit_chunk *asconf, *chk; 1179163953Srrs 1180171572Srrs /* is this a first send, or a retransmission? */ 1181179157Srrs if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1182163953Srrs /* compose a new ASCONF chunk and send it */ 1183172190Srrs sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1184163953Srrs } else { 1185171572Srrs /* 1186171572Srrs * Retransmission of the existing ASCONF is needed 1187171572Srrs */ 1188163953Srrs 1189163953Srrs /* find the existing ASCONF */ 1190179157Srrs asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1191163953Srrs if (asconf == NULL) { 1192163953Srrs return (0); 1193163953Srrs } 1194163953Srrs /* do threshold management */ 1195163953Srrs if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1196163953Srrs stcb->asoc.max_send_times)) { 1197163953Srrs /* Assoc is over */ 1198163953Srrs return (1); 1199163953Srrs } 1200163953Srrs if (asconf->snd_count > stcb->asoc.max_send_times) { 1201163953Srrs /* 1202171572Srrs * Something is rotten: our peer is not responding 1203171572Srrs * to ASCONFs but apparently is to other chunks. 1204171572Srrs * i.e. it is not properly handling the chunk type 1205171572Srrs * upper bits. Mark this peer as ASCONF incapable 1206171572Srrs * and cleanup. 1207163953Srrs */ 1208169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1209163953Srrs sctp_asconf_cleanup(stcb, net); 1210163953Srrs return (0); 1211163953Srrs } 1212163953Srrs /* 1213171572Srrs * cleared threshold management, so now backoff the net and 1214171572Srrs * select an alternate 1215163953Srrs */ 1216210599Srrs sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0); 1217163953Srrs alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1218179157Srrs if (asconf->whoTo != alt) { 1219179157Srrs sctp_free_remote_addr(asconf->whoTo); 1220179157Srrs asconf->whoTo = alt; 1221179157Srrs atomic_add_int(&alt->ref_count, 1); 1222179157Srrs } 1223171572Srrs /* See if an ECN Echo is also stranded */ 1224163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1225163953Srrs if ((chk->whoTo == net) && 1226163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1227163953Srrs sctp_free_remote_addr(chk->whoTo); 1228163953Srrs chk->whoTo = alt; 1229163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1230163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1231163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1232163953Srrs } 1233163953Srrs atomic_add_int(&alt->ref_count, 1); 1234163953Srrs } 1235163953Srrs } 1236216822Stuexen TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) { 1237179157Srrs if (chk->whoTo != alt) { 1238179157Srrs sctp_free_remote_addr(chk->whoTo); 1239179157Srrs chk->whoTo = alt; 1240179157Srrs atomic_add_int(&alt->ref_count, 1); 1241179157Srrs } 1242179157Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1243179157Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1244179157Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1245179157Srrs } 1246224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1247163953Srrs /* 1248163953Srrs * If the address went un-reachable, we need to move 1249171572Srrs * to the alternate for ALL chunks in queue 1250163953Srrs */ 1251212712Stuexen sctp_move_chunks_from_net(stcb, net); 1252163953Srrs } 1253163953Srrs /* mark the retran info */ 1254163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 1255163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1256163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 1257179157Srrs 1258179157Srrs /* send another ASCONF if any and we can do */ 1259179157Srrs sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1260163953Srrs } 1261163953Srrs return (0); 1262163953Srrs} 1263163953Srrs 1264172091Srrs/* Mobility adaptation */ 1265172156Srrsvoid 1266172091Srrssctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1267231038Stuexen struct sctp_nets *net SCTP_UNUSED) 1268172091Srrs{ 1269172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1270172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1271172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1272172156Srrs return; 1273172091Srrs } 1274172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1275172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1276172091Srrs sctp_free_remote_addr(stcb->asoc.deleted_primary); 1277172091Srrs stcb->asoc.deleted_primary = NULL; 1278172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1279172156Srrs return; 1280172091Srrs} 1281172091Srrs 1282163953Srrs/* 1283163953Srrs * For the shutdown and shutdown-ack, we do not keep one around on the 1284163953Srrs * control queue. This means we must generate a new one and call the general 1285163953Srrs * chunk output routine, AFTER having done threshold management. 1286214928Stuexen * It is assumed that net is non-NULL. 1287163953Srrs */ 1288163953Srrsint 1289163953Srrssctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1290163953Srrs struct sctp_nets *net) 1291163953Srrs{ 1292163953Srrs struct sctp_nets *alt; 1293163953Srrs 1294163953Srrs /* first threshold managment */ 1295163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1296163953Srrs /* Assoc is over */ 1297163953Srrs return (1); 1298163953Srrs } 1299214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1300163953Srrs /* second select an alternative */ 1301163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1302163953Srrs 1303163953Srrs /* third generate a shutdown into the queue for out net */ 1304214928Stuexen sctp_send_shutdown(stcb, alt); 1305214928Stuexen 1306163953Srrs /* fourth restart timer */ 1307163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1308163953Srrs return (0); 1309163953Srrs} 1310163953Srrs 1311163953Srrsint 1312163953Srrssctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1313163953Srrs struct sctp_nets *net) 1314163953Srrs{ 1315163953Srrs struct sctp_nets *alt; 1316163953Srrs 1317163953Srrs /* first threshold managment */ 1318163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1319163953Srrs /* Assoc is over */ 1320163953Srrs return (1); 1321163953Srrs } 1322214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1323163953Srrs /* second select an alternative */ 1324163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1325163953Srrs 1326163953Srrs /* third generate a shutdown into the queue for out net */ 1327163953Srrs sctp_send_shutdown_ack(stcb, alt); 1328163953Srrs 1329163953Srrs /* fourth restart timer */ 1330163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1331163953Srrs return (0); 1332163953Srrs} 1333163953Srrs 1334163953Srrsstatic void 1335163953Srrssctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1336163953Srrs struct sctp_tcb *stcb) 1337163953Srrs{ 1338163953Srrs struct sctp_stream_queue_pending *sp; 1339217760Stuexen unsigned int i, chks_in_queue = 0; 1340163953Srrs int being_filled = 0; 1341163953Srrs 1342163953Srrs /* 1343163953Srrs * This function is ONLY called when the send/sent queues are empty. 1344163953Srrs */ 1345163953Srrs if ((stcb == NULL) || (inp == NULL)) 1346163953Srrs return; 1347163953Srrs 1348163953Srrs if (stcb->asoc.sent_queue_retran_cnt) { 1349169420Srrs SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1350163953Srrs stcb->asoc.sent_queue_retran_cnt); 1351163953Srrs stcb->asoc.sent_queue_retran_cnt = 0; 1352163953Srrs } 1353217760Stuexen if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1354218241Stuexen /* No stream scheduler information, initialize scheduler */ 1355218241Stuexen stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0); 1356218241Stuexen if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1357218241Stuexen /* yep, we lost a stream or two */ 1358218241Stuexen SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n"); 1359163953Srrs } else { 1360218241Stuexen /* no streams lost */ 1361163953Srrs stcb->asoc.total_output_queue_size = 0; 1362163953Srrs } 1363163953Srrs } 1364163953Srrs /* Check to see if some data queued, if so report it */ 1365217760Stuexen for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1366217760Stuexen if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1367217760Stuexen TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 1368163953Srrs if (sp->msg_is_complete) 1369163953Srrs being_filled++; 1370163953Srrs chks_in_queue++; 1371163953Srrs } 1372163953Srrs } 1373163953Srrs } 1374163953Srrs if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1375169420Srrs SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1376163953Srrs stcb->asoc.stream_queue_cnt, chks_in_queue); 1377163953Srrs } 1378163953Srrs if (chks_in_queue) { 1379163953Srrs /* call the output queue function */ 1380172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1381163953Srrs if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1382163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1383163953Srrs /* 1384163953Srrs * Probably should go in and make it go back through 1385163953Srrs * and add fragments allowed 1386163953Srrs */ 1387163953Srrs if (being_filled == 0) { 1388169420Srrs SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1389163953Srrs chks_in_queue); 1390163953Srrs } 1391163953Srrs } 1392163953Srrs } else { 1393169420Srrs SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1394163953Srrs (u_long)stcb->asoc.total_output_queue_size); 1395163953Srrs stcb->asoc.total_output_queue_size = 0; 1396163953Srrs } 1397163953Srrs} 1398163953Srrs 1399163953Srrsint 1400163953Srrssctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1401224641Stuexen struct sctp_nets *net) 1402163953Srrs{ 1403224641Stuexen uint8_t net_was_pf; 1404171440Srrs 1405231039Stuexen if (net->dest_state & SCTP_ADDR_PF) { 1406231039Stuexen net_was_pf = 1; 1407231039Stuexen } else { 1408231039Stuexen net_was_pf = 0; 1409231039Stuexen } 1410231039Stuexen if (net->hb_responded == 0) { 1411231039Stuexen if (net->ro._s_addr) { 1412231039Stuexen /* 1413231039Stuexen * Invalidate the src address if we did not get a 1414231039Stuexen * response last time. 1415231039Stuexen */ 1416231039Stuexen sctp_free_ifa(net->ro._s_addr); 1417231039Stuexen net->ro._s_addr = NULL; 1418231039Stuexen net->src_addr_selected = 0; 1419224641Stuexen } 1420231039Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1421231039Stuexen if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1422231039Stuexen /* Assoc is over */ 1423231039Stuexen return (1); 1424163953Srrs } 1425163953Srrs } 1426231039Stuexen /* Zero PBA, if it needs it */ 1427231039Stuexen if (net->partial_bytes_acked) { 1428231039Stuexen net->partial_bytes_acked = 0; 1429231039Stuexen } 1430163953Srrs if ((stcb->asoc.total_output_queue_size > 0) && 1431163953Srrs (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1432163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1433163953Srrs sctp_audit_stream_queues_for_size(inp, stcb); 1434163953Srrs } 1435224641Stuexen if (!(net->dest_state & SCTP_ADDR_NOHB) && 1436224641Stuexen !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) { 1437163953Srrs /* 1438224641Stuexen * when move to PF during threshold mangement, a HB has been 1439224641Stuexen * queued in that routine 1440163953Srrs */ 1441234793Stuexen uint32_t ms_gone_by; 1442234793Stuexen 1443234793Stuexen if ((net->last_sent_time.tv_sec > 0) || 1444234793Stuexen (net->last_sent_time.tv_usec > 0)) { 1445234793Stuexen struct timeval diff; 1446234793Stuexen 1447234793Stuexen SCTP_GETTIME_TIMEVAL(&diff); 1448234793Stuexen timevalsub(&diff, &net->last_sent_time); 1449234793Stuexen ms_gone_by = (uint32_t) (diff.tv_sec * 1000) + 1450234793Stuexen (uint32_t) (diff.tv_usec / 1000); 1451234793Stuexen } else { 1452234793Stuexen ms_gone_by = 0xffffffff; 1453234793Stuexen } 1454234793Stuexen if ((ms_gone_by >= net->heart_beat_delay) || 1455234793Stuexen (net->dest_state & SCTP_ADDR_PF)) { 1456234793Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 1457234793Stuexen } 1458163953Srrs } 1459163953Srrs return (0); 1460163953Srrs} 1461163953Srrs 1462163953Srrsvoid 1463163953Srrssctp_pathmtu_timer(struct sctp_inpcb *inp, 1464163953Srrs struct sctp_tcb *stcb, 1465163953Srrs struct sctp_nets *net) 1466163953Srrs{ 1467179157Srrs uint32_t next_mtu, mtu; 1468163953Srrs 1469231038Stuexen next_mtu = sctp_get_next_mtu(net->mtu); 1470169352Srrs 1471179157Srrs if ((next_mtu > net->mtu) && (net->port == 0)) { 1472169352Srrs if ((net->src_addr_selected == 0) || 1473169352Srrs (net->ro._s_addr == NULL) || 1474169352Srrs (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1475169420Srrs if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1476169352Srrs sctp_free_ifa(net->ro._s_addr); 1477169352Srrs net->ro._s_addr = NULL; 1478169352Srrs net->src_addr_selected = 0; 1479169420Srrs } else if (net->ro._s_addr == NULL) { 1480179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1481179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1482179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1483179157Srrs 1484179157Srrs /* KAME hack: embed scopeid */ 1485197288Srrs (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 1486179157Srrs } 1487179157Srrs#endif 1488179157Srrs 1489169420Srrs net->ro._s_addr = sctp_source_address_selection(inp, 1490169420Srrs stcb, 1491169420Srrs (sctp_route_t *) & net->ro, 1492169420Srrs net, 0, stcb->asoc.vrf_id); 1493179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1494179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1495179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1496179157Srrs 1497179157Srrs (void)sa6_recoverscope(sin6); 1498179157Srrs } 1499179157Srrs#endif /* INET6 */ 1500169352Srrs } 1501169352Srrs if (net->ro._s_addr) 1502169352Srrs net->src_addr_selected = 1; 1503169352Srrs } 1504169352Srrs if (net->ro._s_addr) { 1505169352Srrs mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); 1506185694Srrs if (net->port) { 1507185694Srrs mtu -= sizeof(struct udphdr); 1508185694Srrs } 1509169352Srrs if (mtu > next_mtu) { 1510163953Srrs net->mtu = next_mtu; 1511163953Srrs } 1512163953Srrs } 1513163953Srrs } 1514163953Srrs /* restart the timer */ 1515163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 1516163953Srrs} 1517163953Srrs 1518163953Srrsvoid 1519163953Srrssctp_autoclose_timer(struct sctp_inpcb *inp, 1520163953Srrs struct sctp_tcb *stcb, 1521163953Srrs struct sctp_nets *net) 1522163953Srrs{ 1523163953Srrs struct timeval tn, *tim_touse; 1524163953Srrs struct sctp_association *asoc; 1525163953Srrs int ticks_gone_by; 1526163953Srrs 1527169378Srrs (void)SCTP_GETTIME_TIMEVAL(&tn); 1528163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1529163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1530163953Srrs /* Auto close is on */ 1531163953Srrs asoc = &stcb->asoc; 1532163953Srrs /* pick the time to use */ 1533163953Srrs if (asoc->time_last_rcvd.tv_sec > 1534163953Srrs asoc->time_last_sent.tv_sec) { 1535163953Srrs tim_touse = &asoc->time_last_rcvd; 1536163953Srrs } else { 1537163953Srrs tim_touse = &asoc->time_last_sent; 1538163953Srrs } 1539163953Srrs /* Now has long enough transpired to autoclose? */ 1540163953Srrs ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec); 1541163953Srrs if ((ticks_gone_by > 0) && 1542163953Srrs (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) { 1543163953Srrs /* 1544163953Srrs * autoclose time has hit, call the output routine, 1545163953Srrs * which should do nothing just to be SURE we don't 1546163953Srrs * have hanging data. We can then safely check the 1547163953Srrs * queues and know that we are clear to send 1548163953Srrs * shutdown 1549163953Srrs */ 1550172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); 1551163953Srrs /* Are we clean? */ 1552163953Srrs if (TAILQ_EMPTY(&asoc->send_queue) && 1553163953Srrs TAILQ_EMPTY(&asoc->sent_queue)) { 1554163953Srrs /* 1555163953Srrs * there is nothing queued to send, so I'm 1556163953Srrs * done... 1557163953Srrs */ 1558166675Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1559163953Srrs /* only send SHUTDOWN 1st time thru */ 1560224641Stuexen struct sctp_nets *netp; 1561224641Stuexen 1562224641Stuexen if (stcb->asoc.alternate) { 1563224641Stuexen netp = stcb->asoc.alternate; 1564224641Stuexen } else { 1565224641Stuexen netp = stcb->asoc.primary_destination; 1566224641Stuexen } 1567224641Stuexen sctp_send_shutdown(stcb, netp); 1568166675Srrs if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 1569166675Srrs (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 1570166675Srrs SCTP_STAT_DECR_GAUGE32(sctps_currestab); 1571166675Srrs } 1572171943Srrs SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 1573172703Srrs SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 1574163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 1575163953Srrs stcb->sctp_ep, stcb, 1576224641Stuexen netp); 1577163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1578163953Srrs stcb->sctp_ep, stcb, 1579224641Stuexen netp); 1580163953Srrs } 1581163953Srrs } 1582163953Srrs } else { 1583163953Srrs /* 1584163953Srrs * No auto close at this time, reset t-o to check 1585163953Srrs * later 1586163953Srrs */ 1587163953Srrs int tmp; 1588163953Srrs 1589163953Srrs /* fool the timer startup to use the time left */ 1590163953Srrs tmp = asoc->sctp_autoclose_ticks; 1591163953Srrs asoc->sctp_autoclose_ticks -= ticks_gone_by; 1592163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1593163953Srrs net); 1594163953Srrs /* restore the real tick value */ 1595163953Srrs asoc->sctp_autoclose_ticks = tmp; 1596163953Srrs } 1597163953Srrs } 1598163953Srrs} 1599