1163953Srrs/*- 2169382Srrs * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3237896Stuexen * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4237896Stuexen * 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, 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#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> 52185694Srrs#include <netinet/udp.h> 53163953Srrs 54163953Srrs 55163953Srrsvoid 56163953Srrssctp_audit_retranmission_queue(struct sctp_association *asoc) 57163953Srrs{ 58163953Srrs struct sctp_tmit_chunk *chk; 59163953Srrs 60169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n", 61169420Srrs asoc->sent_queue_retran_cnt, 62169420Srrs asoc->sent_queue_cnt); 63163953Srrs asoc->sent_queue_retran_cnt = 0; 64163953Srrs asoc->sent_queue_cnt = 0; 65163953Srrs TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 66163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 67163953Srrs sctp_ucount_incr(asoc->sent_queue_retran_cnt); 68163953Srrs } 69163953Srrs asoc->sent_queue_cnt++; 70163953Srrs } 71163953Srrs TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 72163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 73163953Srrs sctp_ucount_incr(asoc->sent_queue_retran_cnt); 74163953Srrs } 75163953Srrs } 76179157Srrs TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) { 77179157Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 78179157Srrs sctp_ucount_incr(asoc->sent_queue_retran_cnt); 79179157Srrs } 80179157Srrs } 81169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n", 82169420Srrs asoc->sent_queue_retran_cnt, 83169420Srrs asoc->sent_queue_cnt); 84163953Srrs} 85163953Srrs 86163953Srrsint 87163953Srrssctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 88163953Srrs struct sctp_nets *net, uint16_t threshold) 89163953Srrs{ 90163953Srrs if (net) { 91163953Srrs net->error_count++; 92169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n", 93252927Stuexen (void *)net, net->error_count, 94169420Srrs net->failure_threshold); 95163953Srrs if (net->error_count > net->failure_threshold) { 96163953Srrs /* We had a threshold failure */ 97163953Srrs if (net->dest_state & SCTP_ADDR_REACHABLE) { 98163953Srrs net->dest_state &= ~SCTP_ADDR_REACHABLE; 99167598Srrs net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; 100224641Stuexen net->dest_state &= ~SCTP_ADDR_PF; 101163953Srrs sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 102237888Stuexen stcb, 0, 103172090Srrs (void *)net, SCTP_SO_NOT_LOCKED); 104163953Srrs } 105224641Stuexen } else if ((net->pf_threshold < net->failure_threshold) && 106224641Stuexen (net->error_count > net->pf_threshold)) { 107224641Stuexen if (!(net->dest_state & SCTP_ADDR_PF)) { 108224641Stuexen net->dest_state |= SCTP_ADDR_PF; 109224641Stuexen net->last_active = sctp_get_tick_count(); 110224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 111224641Stuexen sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_TIMER + SCTP_LOC_3); 112224641Stuexen sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net); 113224641Stuexen } 114163953Srrs } 115163953Srrs } 116163953Srrs if (stcb == NULL) 117163953Srrs return (0); 118163953Srrs 119163953Srrs if (net) { 120163953Srrs if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { 121179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 122171943Srrs sctp_misc_ints(SCTP_THRESHOLD_INCR, 123171943Srrs stcb->asoc.overall_error_count, 124171943Srrs (stcb->asoc.overall_error_count + 1), 125171943Srrs SCTP_FROM_SCTP_TIMER, 126171943Srrs __LINE__); 127171943Srrs } 128163953Srrs stcb->asoc.overall_error_count++; 129163953Srrs } 130163953Srrs } else { 131179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 132171943Srrs sctp_misc_ints(SCTP_THRESHOLD_INCR, 133171943Srrs stcb->asoc.overall_error_count, 134171943Srrs (stcb->asoc.overall_error_count + 1), 135171943Srrs SCTP_FROM_SCTP_TIMER, 136171943Srrs __LINE__); 137171943Srrs } 138163953Srrs stcb->asoc.overall_error_count++; 139163953Srrs } 140169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n", 141252927Stuexen (void *)&stcb->asoc, stcb->asoc.overall_error_count, 142169420Srrs (uint32_t) threshold, 143169420Srrs ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state)); 144163953Srrs /* 145163953Srrs * We specifically do not do >= to give the assoc one more change 146163953Srrs * before we fail it. 147163953Srrs */ 148163953Srrs if (stcb->asoc.overall_error_count > threshold) { 149163953Srrs /* Abort notification sends a ULP notify */ 150266181Stuexen struct mbuf *op_err; 151163953Srrs 152266181Stuexen op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, 153266181Stuexen "Association error couter exceeded"); 154165220Srrs inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1; 155266181Stuexen sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED); 156163953Srrs return (1); 157163953Srrs } 158163953Srrs return (0); 159163953Srrs} 160163953Srrs 161214928Stuexen/* 162214928Stuexen * sctp_find_alternate_net() returns a non-NULL pointer as long 163214928Stuexen * the argument net is non-NULL. 164214928Stuexen */ 165163953Srrsstruct sctp_nets * 166163953Srrssctp_find_alternate_net(struct sctp_tcb *stcb, 167163953Srrs struct sctp_nets *net, 168171440Srrs int mode) 169163953Srrs{ 170163953Srrs /* Find and return an alternate network if possible */ 171171440Srrs struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL; 172163953Srrs int once; 173163953Srrs 174171440Srrs /* JRS 5/14/07 - Initialize min_errors to an impossible value. */ 175171440Srrs int min_errors = -1; 176171440Srrs uint32_t max_cwnd = 0; 177171440Srrs 178163953Srrs if (stcb->asoc.numnets == 1) { 179163953Srrs /* No others but net */ 180163953Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 181163953Srrs } 182171440Srrs /* 183171440Srrs * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate 184171440Srrs * net algorithm. This algorithm chooses the active destination (not 185171440Srrs * in PF state) with the largest cwnd value. If all destinations are 186171440Srrs * in PF state, unreachable, or unconfirmed, choose the desination 187171440Srrs * that is in PF state with the lowest error count. In case of a 188171440Srrs * tie, choose the destination that was most recently active. 189171440Srrs */ 190171440Srrs if (mode == 2) { 191163953Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 192171440Srrs /* 193171440Srrs * JRS 5/14/07 - If the destination is unreachable 194171440Srrs * or unconfirmed, skip it. 195171440Srrs */ 196163953Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 197171440Srrs (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 198171440Srrs continue; 199171440Srrs } 200171440Srrs /* 201171440Srrs * JRS 5/14/07 - If the destination is reachable 202171440Srrs * but in PF state, compare the error count of the 203171440Srrs * destination to the minimum error count seen thus 204171440Srrs * far. Store the destination with the lower error 205171440Srrs * count. If the error counts are equal, store the 206171440Srrs * destination that was most recently active. 207171440Srrs */ 208171440Srrs if (mnet->dest_state & SCTP_ADDR_PF) { 209171440Srrs /* 210171440Srrs * JRS 5/14/07 - If the destination under 211171440Srrs * consideration is the current destination, 212171440Srrs * work as if the error count is one higher. 213171440Srrs * The actual error count will not be 214171440Srrs * incremented until later in the t3 215171440Srrs * handler. 216171440Srrs */ 217171440Srrs if (mnet == net) { 218171440Srrs if (min_errors == -1) { 219171440Srrs min_errors = mnet->error_count + 1; 220171440Srrs min_errors_net = mnet; 221171440Srrs } else if (mnet->error_count + 1 < min_errors) { 222171440Srrs min_errors = mnet->error_count + 1; 223171440Srrs min_errors_net = mnet; 224171440Srrs } else if (mnet->error_count + 1 == min_errors 225171440Srrs && mnet->last_active > min_errors_net->last_active) { 226171440Srrs min_errors_net = mnet; 227171440Srrs min_errors = mnet->error_count + 1; 228171440Srrs } 229171440Srrs continue; 230171440Srrs } else { 231171440Srrs if (min_errors == -1) { 232171440Srrs min_errors = mnet->error_count; 233171440Srrs min_errors_net = mnet; 234171440Srrs } else if (mnet->error_count < min_errors) { 235171440Srrs min_errors = mnet->error_count; 236171440Srrs min_errors_net = mnet; 237171440Srrs } else if (mnet->error_count == min_errors 238171440Srrs && mnet->last_active > min_errors_net->last_active) { 239171440Srrs min_errors_net = mnet; 240171440Srrs min_errors = mnet->error_count; 241171440Srrs } 242171440Srrs continue; 243171440Srrs } 244171440Srrs } 245171440Srrs /* 246171440Srrs * JRS 5/14/07 - If the destination is reachable and 247171440Srrs * not in PF state, compare the cwnd of the 248171440Srrs * destination to the highest cwnd seen thus far. 249171440Srrs * Store the destination with the higher cwnd value. 250171440Srrs * If the cwnd values are equal, randomly choose one 251171440Srrs * of the two destinations. 252171440Srrs */ 253171440Srrs if (max_cwnd < mnet->cwnd) { 254171440Srrs max_cwnd_net = mnet; 255171440Srrs max_cwnd = mnet->cwnd; 256171440Srrs } else if (max_cwnd == mnet->cwnd) { 257171440Srrs uint32_t rndval; 258171440Srrs uint8_t this_random; 259171440Srrs 260171440Srrs if (stcb->asoc.hb_random_idx > 3) { 261171440Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 262171440Srrs memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values)); 263171440Srrs this_random = stcb->asoc.hb_random_values[0]; 264171440Srrs stcb->asoc.hb_random_idx++; 265171440Srrs stcb->asoc.hb_ect_randombit = 0; 266171440Srrs } else { 267171440Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 268171440Srrs stcb->asoc.hb_random_idx++; 269171440Srrs stcb->asoc.hb_ect_randombit = 0; 270171440Srrs } 271171440Srrs if (this_random % 2 == 1) { 272171440Srrs max_cwnd_net = mnet; 273180387Srrs max_cwnd = mnet->cwnd; /* Useless? */ 274171440Srrs } 275171440Srrs } 276171440Srrs } 277171440Srrs if (max_cwnd_net == NULL) { 278171440Srrs if (min_errors_net == NULL) { 279171440Srrs return (net); 280171440Srrs } 281171440Srrs return (min_errors_net); 282171440Srrs } else { 283171440Srrs return (max_cwnd_net); 284171440Srrs } 285171440Srrs } 286171440Srrs /* 287171440Srrs * JRS 5/14/07 - If mode is set to 1, use the CMT policy for 288171440Srrs * choosing an alternate net. 289171440Srrs */ 290171440Srrs else if (mode == 1) { 291171440Srrs TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 292171440Srrs if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 293214928Stuexen (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 294163953Srrs /* 295163953Srrs * will skip ones that are not-reachable or 296163953Srrs * unconfirmed 297163953Srrs */ 298163953Srrs continue; 299163953Srrs } 300171440Srrs if (max_cwnd < mnet->cwnd) { 301171440Srrs max_cwnd_net = mnet; 302171440Srrs max_cwnd = mnet->cwnd; 303171440Srrs } else if (max_cwnd == mnet->cwnd) { 304163953Srrs uint32_t rndval; 305163953Srrs uint8_t this_random; 306163953Srrs 307163953Srrs if (stcb->asoc.hb_random_idx > 3) { 308163953Srrs rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 309163953Srrs memcpy(stcb->asoc.hb_random_values, &rndval, 310163953Srrs sizeof(stcb->asoc.hb_random_values)); 311163953Srrs this_random = stcb->asoc.hb_random_values[0]; 312163953Srrs stcb->asoc.hb_random_idx = 0; 313163953Srrs stcb->asoc.hb_ect_randombit = 0; 314163953Srrs } else { 315163953Srrs this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 316163953Srrs stcb->asoc.hb_random_idx++; 317163953Srrs stcb->asoc.hb_ect_randombit = 0; 318163953Srrs } 319163953Srrs if (this_random % 2) { 320171440Srrs max_cwnd_net = mnet; 321171440Srrs max_cwnd = mnet->cwnd; 322163953Srrs } 323163953Srrs } 324163953Srrs } 325171440Srrs if (max_cwnd_net) { 326171440Srrs return (max_cwnd_net); 327163953Srrs } 328163953Srrs } 329163953Srrs mnet = net; 330163953Srrs once = 0; 331163953Srrs 332163953Srrs if (mnet == NULL) { 333163953Srrs mnet = TAILQ_FIRST(&stcb->asoc.nets); 334212225Srrs if (mnet == NULL) { 335212225Srrs return (NULL); 336212225Srrs } 337163953Srrs } 338163953Srrs do { 339163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 340163953Srrs if (alt == NULL) { 341163953Srrs once++; 342163953Srrs if (once > 1) { 343163953Srrs break; 344163953Srrs } 345163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 346212225Srrs if (alt == NULL) { 347212225Srrs return (NULL); 348212225Srrs } 349163953Srrs } 350163953Srrs if (alt->ro.ro_rt == NULL) { 351167598Srrs if (alt->ro._s_addr) { 352167598Srrs sctp_free_ifa(alt->ro._s_addr); 353167598Srrs alt->ro._s_addr = NULL; 354167598Srrs } 355163953Srrs alt->src_addr_selected = 0; 356163953Srrs } 357214928Stuexen /* sa_ignore NO_NULL_CHK */ 358214928Stuexen if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && 359163953Srrs (alt->ro.ro_rt != NULL) && 360214928Stuexen (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) { 361163953Srrs /* Found a reachable address */ 362163953Srrs break; 363163953Srrs } 364163953Srrs mnet = alt; 365163953Srrs } while (alt != NULL); 366163953Srrs 367163953Srrs if (alt == NULL) { 368163953Srrs /* Case where NO insv network exists (dormant state) */ 369163953Srrs /* we rotate destinations */ 370163953Srrs once = 0; 371163953Srrs mnet = net; 372163953Srrs do { 373212225Srrs if (mnet == NULL) { 374212225Srrs return (TAILQ_FIRST(&stcb->asoc.nets)); 375212225Srrs } 376163953Srrs alt = TAILQ_NEXT(mnet, sctp_next); 377163953Srrs if (alt == NULL) { 378163953Srrs once++; 379163953Srrs if (once > 1) { 380163953Srrs break; 381163953Srrs } 382163953Srrs alt = TAILQ_FIRST(&stcb->asoc.nets); 383163953Srrs } 384169655Srrs /* sa_ignore NO_NULL_CHK */ 385163953Srrs if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) && 386163953Srrs (alt != net)) { 387163953Srrs /* Found an alternate address */ 388163953Srrs break; 389163953Srrs } 390163953Srrs mnet = alt; 391163953Srrs } while (alt != NULL); 392163953Srrs } 393163953Srrs if (alt == NULL) { 394163953Srrs return (net); 395163953Srrs } 396163953Srrs return (alt); 397163953Srrs} 398163953Srrs 399163953Srrsstatic void 400163953Srrssctp_backoff_on_timeout(struct sctp_tcb *stcb, 401163953Srrs struct sctp_nets *net, 402163953Srrs int win_probe, 403210599Srrs int num_marked, int num_abandoned) 404163953Srrs{ 405170642Srrs if (net->RTO == 0) { 406170642Srrs net->RTO = stcb->asoc.minrto; 407170642Srrs } 408163953Srrs net->RTO <<= 1; 409163953Srrs if (net->RTO > stcb->asoc.maxrto) { 410163953Srrs net->RTO = stcb->asoc.maxrto; 411163953Srrs } 412210599Srrs if ((win_probe == 0) && (num_marked || num_abandoned)) { 413163953Srrs /* We don't apply penalty to window probe scenarios */ 414171440Srrs /* JRS - Use the congestion control given in the CC module */ 415171440Srrs stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 416163953Srrs } 417163953Srrs} 418163953Srrs 419184333Srrs#ifndef INVARIANTS 420184333Srrsstatic void 421182367Srrssctp_recover_sent_list(struct sctp_tcb *stcb) 422182367Srrs{ 423216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 424182367Srrs struct sctp_association *asoc; 425182367Srrs 426182367Srrs asoc = &stcb->asoc; 427216822Stuexen TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 428216825Stuexen if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) { 429182367Srrs SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", 430252927Stuexen (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq); 431252943Stuexen if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 432252942Stuexen if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 433252942Stuexen asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 434252942Stuexen } 435252942Stuexen } 436182367Srrs TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 437265963Stuexen if (PR_SCTP_ENABLED(chk->flags)) { 438182367Srrs if (asoc->pr_sctp_cnt != 0) 439182367Srrs asoc->pr_sctp_cnt--; 440182367Srrs } 441182367Srrs if (chk->data) { 442182367Srrs /* sa_ignore NO_NULL_CHK */ 443182367Srrs sctp_free_bufspace(stcb, asoc, chk, 1); 444182367Srrs sctp_m_freem(chk->data); 445216822Stuexen chk->data = NULL; 446196260Stuexen if (asoc->peer_supports_prsctp && PR_SCTP_BUF_ENABLED(chk->flags)) { 447182367Srrs asoc->sent_queue_cnt_removeable--; 448182367Srrs } 449182367Srrs } 450182367Srrs asoc->sent_queue_cnt--; 451221627Stuexen sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 452182367Srrs } 453182367Srrs } 454182367Srrs SCTP_PRINTF("after recover order is as follows\n"); 455216822Stuexen TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 456252927Stuexen SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq); 457182367Srrs } 458182367Srrs} 459182367Srrs 460184333Srrs#endif 461184333Srrs 462163953Srrsstatic int 463163953Srrssctp_mark_all_for_resend(struct sctp_tcb *stcb, 464163953Srrs struct sctp_nets *net, 465163953Srrs struct sctp_nets *alt, 466163953Srrs int window_probe, 467210599Srrs int *num_marked, 468210599Srrs int *num_abandoned) 469163953Srrs{ 470163953Srrs 471163953Srrs /* 472163953Srrs * Mark all chunks (well not all) that were sent to *net for 473163953Srrs * retransmission. Move them to alt for there destination as well... 474163953Srrs * We only mark chunks that have been outstanding long enough to 475163953Srrs * have received feed-back. 476163953Srrs */ 477216822Stuexen struct sctp_tmit_chunk *chk, *nchk; 478163953Srrs struct sctp_nets *lnets; 479163953Srrs struct timeval now, min_wait, tv; 480219014Stuexen int cur_rto; 481210599Srrs int cnt_abandoned; 482168709Srrs int audit_tf, num_mk, fir; 483163953Srrs unsigned int cnt_mk; 484168709Srrs uint32_t orig_flight, orig_tf; 485163953Srrs uint32_t tsnlast, tsnfirst; 486182367Srrs int recovery_cnt = 0; 487163953Srrs 488171440Srrs 489163953Srrs /* none in flight now */ 490163953Srrs audit_tf = 0; 491163953Srrs fir = 0; 492163953Srrs /* 493163953Srrs * figure out how long a data chunk must be pending before we can 494163953Srrs * mark it .. 495163953Srrs */ 496169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 497163953Srrs /* get cur rto in micro-seconds */ 498219014Stuexen cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; 499219014Stuexen cur_rto *= 1000; 500224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 501219014Stuexen sctp_log_fr(cur_rto, 502170744Srrs stcb->asoc.peers_rwnd, 503170744Srrs window_probe, 504170744Srrs SCTP_FR_T3_MARK_TIME); 505224641Stuexen sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT); 506170744Srrs sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 507170744Srrs } 508219014Stuexen tv.tv_sec = cur_rto / 1000000; 509219014Stuexen tv.tv_usec = cur_rto % 1000000; 510163953Srrs min_wait = now; 511163953Srrs timevalsub(&min_wait, &tv); 512163953Srrs if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 513163953Srrs /* 514163953Srrs * if we hit here, we don't have enough seconds on the clock 515163953Srrs * to account for the RTO. We just let the lower seconds be 516163953Srrs * the bounds and don't worry about it. This may mean we 517163953Srrs * will mark a lot more than we should. 518163953Srrs */ 519163953Srrs min_wait.tv_sec = min_wait.tv_usec = 0; 520163953Srrs } 521224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 522219014Stuexen sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 523170744Srrs sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 524170744Srrs } 525163953Srrs /* 526163953Srrs * Our rwnd will be incorrect here since we are not adding back the 527163953Srrs * cnt * mbuf but we will fix that down below. 528163953Srrs */ 529163953Srrs orig_flight = net->flight_size; 530168709Srrs orig_tf = stcb->asoc.total_flight; 531168709Srrs 532163953Srrs net->fast_retran_ip = 0; 533163953Srrs /* Now on to each chunk */ 534210599Srrs cnt_abandoned = 0; 535163953Srrs num_mk = cnt_mk = 0; 536163953Srrs tsnfirst = tsnlast = 0; 537184333Srrs#ifndef INVARIANTS 538182367Srrsstart_again: 539184333Srrs#endif 540216822Stuexen TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) { 541216825Stuexen if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) { 542163953Srrs /* Strange case our list got out of order? */ 543266052Stuexen SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n", 544182367Srrs (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq); 545182367Srrs recovery_cnt++; 546182367Srrs#ifdef INVARIANTS 547182367Srrs panic("last acked >= chk on sent-Q"); 548182367Srrs#else 549182367Srrs SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); 550182367Srrs sctp_recover_sent_list(stcb); 551182367Srrs if (recovery_cnt < 10) { 552182367Srrs goto start_again; 553182367Srrs } else { 554182367Srrs SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); 555182367Srrs } 556182367Srrs#endif 557163953Srrs } 558163953Srrs if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 559163953Srrs /* 560163953Srrs * found one to mark: If it is less than 561163953Srrs * DATAGRAM_ACKED it MUST not be a skipped or marked 562163953Srrs * TSN but instead one that is either already set 563163953Srrs * for retransmission OR one that needs 564163953Srrs * retransmission. 565163953Srrs */ 566163953Srrs 567163953Srrs /* validate its been outstanding long enough */ 568224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 569170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, 570170744Srrs chk->sent_rcv_time.tv_sec, 571170744Srrs chk->sent_rcv_time.tv_usec, 572170744Srrs SCTP_FR_T3_MARK_TIME); 573170744Srrs } 574163953Srrs if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 575163953Srrs /* 576163953Srrs * we have reached a chunk that was sent 577163953Srrs * some seconds past our min.. forget it we 578163953Srrs * will find no more to send. 579163953Srrs */ 580224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 581170744Srrs sctp_log_fr(0, 582170744Srrs chk->sent_rcv_time.tv_sec, 583170744Srrs chk->sent_rcv_time.tv_usec, 584170744Srrs SCTP_FR_T3_STOPPED); 585170744Srrs } 586163953Srrs continue; 587163953Srrs } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 588163953Srrs (window_probe == 0)) { 589163953Srrs /* 590163953Srrs * we must look at the micro seconds to 591163953Srrs * know. 592163953Srrs */ 593163953Srrs if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 594163953Srrs /* 595163953Srrs * ok it was sent after our boundary 596163953Srrs * time. 597163953Srrs */ 598163953Srrs continue; 599163953Srrs } 600163953Srrs } 601196260Stuexen if (stcb->asoc.peer_supports_prsctp && PR_SCTP_TTL_ENABLED(chk->flags)) { 602163953Srrs /* Is it expired? */ 603212801Stuexen if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { 604163953Srrs /* Yes so drop it */ 605163953Srrs if (chk->data) { 606169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 607163953Srrs chk, 608237889Stuexen 1, 609189790Srrs SCTP_SO_NOT_LOCKED); 610210599Srrs cnt_abandoned++; 611163953Srrs } 612185694Srrs continue; 613163953Srrs } 614163953Srrs } 615196260Stuexen if (stcb->asoc.peer_supports_prsctp && PR_SCTP_RTX_ENABLED(chk->flags)) { 616163953Srrs /* Has it been retransmitted tv_sec times? */ 617163953Srrs if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 618163953Srrs if (chk->data) { 619169420Srrs (void)sctp_release_pr_sctp_chunk(stcb, 620163953Srrs chk, 621237889Stuexen 1, 622189790Srrs SCTP_SO_NOT_LOCKED); 623210599Srrs cnt_abandoned++; 624163953Srrs } 625185694Srrs continue; 626163953Srrs } 627163953Srrs } 628168709Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 629163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 630163953Srrs num_mk++; 631163953Srrs if (fir == 0) { 632163953Srrs fir = 1; 633163953Srrs tsnfirst = chk->rec.data.TSN_seq; 634163953Srrs } 635163953Srrs tsnlast = chk->rec.data.TSN_seq; 636224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 637170744Srrs sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 638170744Srrs 0, SCTP_FR_T3_MARKED); 639170744Srrs } 640168709Srrs if (chk->rec.data.chunk_was_revoked) { 641168709Srrs /* deflate the cwnd */ 642168709Srrs chk->whoTo->cwnd -= chk->book_size; 643168709Srrs chk->rec.data.chunk_was_revoked = 0; 644168709Srrs } 645168709Srrs net->marked_retrans++; 646168709Srrs stcb->asoc.marked_retrans++; 647179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 648170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 649170744Srrs chk->whoTo->flight_size, 650170744Srrs chk->book_size, 651170744Srrs (uintptr_t) chk->whoTo, 652170744Srrs chk->rec.data.TSN_seq); 653170744Srrs } 654168709Srrs sctp_flight_size_decrease(chk); 655168709Srrs sctp_total_flight_decrease(stcb, chk); 656168709Srrs stcb->asoc.peers_rwnd += chk->send_size; 657179783Srrs stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 658163953Srrs } 659163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 660163953Srrs SCTP_STAT_INCR(sctps_markedretrans); 661165220Srrs 662163953Srrs /* reset the TSN for striking and other FR stuff */ 663163953Srrs chk->rec.data.doing_fast_retransmit = 0; 664163953Srrs /* Clear any time so NO RTT is being done */ 665219397Srrs 666219397Srrs if (chk->do_rtt) { 667219397Srrs if (chk->whoTo->rto_needed == 0) { 668219397Srrs chk->whoTo->rto_needed = 1; 669219397Srrs } 670219397Srrs } 671163953Srrs chk->do_rtt = 0; 672163953Srrs if (alt != net) { 673163953Srrs sctp_free_remote_addr(chk->whoTo); 674163953Srrs chk->no_fr_allowed = 1; 675163953Srrs chk->whoTo = alt; 676163953Srrs atomic_add_int(&alt->ref_count, 1); 677163953Srrs } else { 678163953Srrs chk->no_fr_allowed = 0; 679163953Srrs if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 680163953Srrs chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 681163953Srrs } else { 682163953Srrs chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 683163953Srrs } 684163953Srrs } 685170181Srrs /* 686170181Srrs * CMT: Do not allow FRs on retransmitted TSNs. 687170181Srrs */ 688216669Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 689163953Srrs chk->no_fr_allowed = 1; 690163953Srrs } 691210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 692163953Srrs } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 693163953Srrs /* remember highest acked one */ 694163953Srrs could_be_sent = chk; 695210599Srrs#endif 696163953Srrs } 697163953Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 698163953Srrs cnt_mk++; 699163953Srrs } 700163953Srrs } 701168709Srrs if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 702168709Srrs /* we did not subtract the same things? */ 703168709Srrs audit_tf = 1; 704168709Srrs } 705224641Stuexen if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 706170744Srrs sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 707170744Srrs } 708163953Srrs#ifdef SCTP_DEBUG 709169420Srrs if (num_mk) { 710169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 711169420Srrs tsnlast); 712169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n", 713169420Srrs num_mk, (u_long)stcb->asoc.peers_rwnd); 714169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 715169420Srrs tsnlast); 716169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n", 717169420Srrs num_mk, 718169420Srrs (int)stcb->asoc.peers_rwnd); 719163953Srrs } 720163953Srrs#endif 721163953Srrs *num_marked = num_mk; 722210599Srrs *num_abandoned = cnt_abandoned; 723210493Srrs /* 724210493Srrs * Now check for a ECN Echo that may be stranded And include the 725210493Srrs * cnt_mk'd to have all resends in the control queue. 726210493Srrs */ 727210493Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 728210493Srrs if (chk->sent == SCTP_DATAGRAM_RESEND) { 729210493Srrs cnt_mk++; 730210493Srrs } 731210493Srrs if ((chk->whoTo == net) && 732210493Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 733210493Srrs sctp_free_remote_addr(chk->whoTo); 734210493Srrs chk->whoTo = alt; 735210493Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 736210493Srrs chk->sent = SCTP_DATAGRAM_RESEND; 737210493Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 738210493Srrs cnt_mk++; 739210493Srrs } 740210493Srrs atomic_add_int(&alt->ref_count, 1); 741210493Srrs } 742210493Srrs } 743210599Srrs#ifdef THIS_SHOULD_NOT_BE_DONE 744163953Srrs if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 745163953Srrs /* fix it so we retransmit the highest acked anyway */ 746163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 747163953Srrs cnt_mk++; 748163953Srrs could_be_sent->sent = SCTP_DATAGRAM_RESEND; 749163953Srrs } 750210599Srrs#endif 751163953Srrs if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 752165220Srrs#ifdef INVARIANTS 753171477Srrs SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 754171477Srrs cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 755163953Srrs#endif 756163953Srrs#ifndef SCTP_AUDITING_ENABLED 757163953Srrs stcb->asoc.sent_queue_retran_cnt = cnt_mk; 758163953Srrs#endif 759163953Srrs } 760163953Srrs if (audit_tf) { 761169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 762169420Srrs "Audit total flight due to negative value net:%p\n", 763252927Stuexen (void *)net); 764163953Srrs stcb->asoc.total_flight = 0; 765163953Srrs stcb->asoc.total_flight_count = 0; 766163953Srrs /* Clear all networks flight size */ 767163953Srrs TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 768163953Srrs lnets->flight_size = 0; 769169420Srrs SCTPDBG(SCTP_DEBUG_TIMER4, 770169420Srrs "Net:%p c-f cwnd:%d ssthresh:%d\n", 771252927Stuexen (void *)lnets, lnets->cwnd, lnets->ssthresh); 772163953Srrs } 773163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 774163953Srrs if (chk->sent < SCTP_DATAGRAM_RESEND) { 775179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 776170744Srrs sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 777170744Srrs chk->whoTo->flight_size, 778170744Srrs chk->book_size, 779170744Srrs (uintptr_t) chk->whoTo, 780170744Srrs chk->rec.data.TSN_seq); 781170744Srrs } 782168709Srrs sctp_flight_size_increase(chk); 783168709Srrs sctp_total_flight_increase(stcb, chk); 784163953Srrs } 785163953Srrs } 786163953Srrs } 787163953Srrs /* We return 1 if we only have a window probe outstanding */ 788163953Srrs return (0); 789163953Srrs} 790163953Srrs 791163953Srrs 792163953Srrsint 793163953Srrssctp_t3rxt_timer(struct sctp_inpcb *inp, 794163953Srrs struct sctp_tcb *stcb, 795163953Srrs struct sctp_nets *net) 796163953Srrs{ 797163953Srrs struct sctp_nets *alt; 798210599Srrs int win_probe, num_mk, num_abandoned; 799163953Srrs 800179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 801170744Srrs sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 802170744Srrs } 803179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 804163953Srrs struct sctp_nets *lnet; 805163953Srrs 806163953Srrs TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 807163953Srrs if (net == lnet) { 808163953Srrs sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 809163953Srrs } else { 810163953Srrs sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 811163953Srrs } 812163953Srrs } 813163953Srrs } 814163953Srrs /* Find an alternate and mark those for retransmission */ 815163953Srrs if ((stcb->asoc.peers_rwnd == 0) && 816163953Srrs (stcb->asoc.total_flight < net->mtu)) { 817163953Srrs SCTP_STAT_INCR(sctps_timowindowprobe); 818163953Srrs win_probe = 1; 819163953Srrs } else { 820163953Srrs win_probe = 0; 821163953Srrs } 822168709Srrs 823163953Srrs if (win_probe == 0) { 824163953Srrs /* We don't do normal threshold management on window probes */ 825163953Srrs if (sctp_threshold_management(inp, stcb, net, 826163953Srrs stcb->asoc.max_send_times)) { 827163953Srrs /* Association was destroyed */ 828163953Srrs return (1); 829163953Srrs } else { 830163953Srrs if (net != stcb->asoc.primary_destination) { 831163953Srrs /* send a immediate HB if our RTO is stale */ 832163953Srrs struct timeval now; 833163953Srrs unsigned int ms_goneby; 834163953Srrs 835169378Srrs (void)SCTP_GETTIME_TIMEVAL(&now); 836163953Srrs if (net->last_sent_time.tv_sec) { 837163953Srrs ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 838163953Srrs } else { 839163953Srrs ms_goneby = 0; 840163953Srrs } 841224641Stuexen if ((net->dest_state & SCTP_ADDR_PF) == 0) { 842224641Stuexen if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 843185694Srrs /* 844224641Stuexen * no recent feed back in an 845224641Stuexen * RTO or more, request a 846224641Stuexen * RTT update 847185694Srrs */ 848224641Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 849224641Stuexen } 850163953Srrs } 851163953Srrs } 852163953Srrs } 853163953Srrs } else { 854163953Srrs /* 855163953Srrs * For a window probe we don't penalize the net's but only 856163953Srrs * the association. This may fail it if SACKs are not coming 857163953Srrs * back. If sack's are coming with rwnd locked at 0, we will 858163953Srrs * continue to hold things waiting for rwnd to raise 859163953Srrs */ 860163953Srrs if (sctp_threshold_management(inp, stcb, NULL, 861163953Srrs stcb->asoc.max_send_times)) { 862163953Srrs /* Association was destroyed */ 863163953Srrs return (1); 864163953Srrs } 865163953Srrs } 866224641Stuexen if (stcb->asoc.sctp_cmt_on_off > 0) { 867224641Stuexen if (net->pf_threshold < net->failure_threshold) { 868224641Stuexen alt = sctp_find_alternate_net(stcb, net, 2); 869224641Stuexen } else { 870224641Stuexen /* 871224641Stuexen * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is 872224641Stuexen * being used, then pick dest with largest ssthresh 873224641Stuexen * for any retransmission. 874224641Stuexen */ 875224641Stuexen alt = sctp_find_alternate_net(stcb, net, 1); 876224641Stuexen /* 877224641Stuexen * CUCv2: If a different dest is picked for the 878224641Stuexen * retransmission, then new (rtx-)pseudo_cumack 879224641Stuexen * needs to be tracked for orig dest. Let CUCv2 880224641Stuexen * track new (rtx-) pseudo-cumack always. 881224641Stuexen */ 882224641Stuexen net->find_pseudo_cumack = 1; 883224641Stuexen net->find_rtx_pseudo_cumack = 1; 884224641Stuexen } 885224641Stuexen } else { 886224641Stuexen alt = sctp_find_alternate_net(stcb, net, 0); 887224641Stuexen } 888224641Stuexen 889224641Stuexen num_mk = 0; 890224641Stuexen num_abandoned = 0; 891224641Stuexen (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, 892224641Stuexen &num_mk, &num_abandoned); 893224641Stuexen /* FR Loss recovery just ended with the T3. */ 894224641Stuexen stcb->asoc.fast_retran_loss_recovery = 0; 895224641Stuexen 896224641Stuexen /* CMT FR loss recovery ended with the T3 */ 897224641Stuexen net->fast_retran_loss_recovery = 0; 898224641Stuexen if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 899224641Stuexen (net->flight_size == 0)) { 900224641Stuexen (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 901224641Stuexen } 902224641Stuexen /* 903224641Stuexen * setup the sat loss recovery that prevents satellite cwnd advance. 904224641Stuexen */ 905224641Stuexen stcb->asoc.sat_t3_loss_recovery = 1; 906224641Stuexen stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 907224641Stuexen 908224641Stuexen /* Backoff the timer and cwnd */ 909224641Stuexen sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); 910224641Stuexen if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) || 911224641Stuexen (net->dest_state & SCTP_ADDR_PF)) { 912163953Srrs /* Move all pending over too */ 913212712Stuexen sctp_move_chunks_from_net(stcb, net); 914169352Srrs 915169352Srrs /* 916169352Srrs * Get the address that failed, to force a new src address 917169352Srrs * selecton and a route allocation. 918169352Srrs */ 919169352Srrs if (net->ro._s_addr) { 920169352Srrs sctp_free_ifa(net->ro._s_addr); 921169352Srrs net->ro._s_addr = NULL; 922169352Srrs } 923169352Srrs net->src_addr_selected = 0; 924169352Srrs 925169352Srrs /* Force a route allocation too */ 926169352Srrs if (net->ro.ro_rt) { 927169352Srrs RTFREE(net->ro.ro_rt); 928169352Srrs net->ro.ro_rt = NULL; 929169352Srrs } 930163953Srrs /* Was it our primary? */ 931163953Srrs if ((stcb->asoc.primary_destination == net) && (alt != net)) { 932163953Srrs /* 933163953Srrs * Yes, note it as such and find an alternate note: 934163953Srrs * this means HB code must use this to resent the 935163953Srrs * primary if it goes active AND if someone does a 936163953Srrs * change-primary then this flag must be cleared 937163953Srrs * from any net structures. 938163953Srrs */ 939224641Stuexen if (stcb->asoc.alternate) { 940224641Stuexen sctp_free_remote_addr(stcb->asoc.alternate); 941163953Srrs } 942224641Stuexen stcb->asoc.alternate = alt; 943224641Stuexen atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 944163953Srrs } 945163953Srrs } 946163953Srrs /* 947163953Srrs * Special case for cookie-echo'ed case, we don't do output but must 948163953Srrs * await the COOKIE-ACK before retransmission 949163953Srrs */ 950163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 951163953Srrs /* 952163953Srrs * Here we just reset the timer and start again since we 953163953Srrs * have not established the asoc 954163953Srrs */ 955163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 956163953Srrs return (0); 957163953Srrs } 958163953Srrs if (stcb->asoc.peer_supports_prsctp) { 959163953Srrs struct sctp_tmit_chunk *lchk; 960163953Srrs 961163953Srrs lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 962163953Srrs /* C3. See if we need to send a Fwd-TSN */ 963216825Stuexen if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { 964163953Srrs send_forward_tsn(stcb, &stcb->asoc); 965163953Srrs if (lchk) { 966163953Srrs /* Assure a timer is up */ 967163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 968163953Srrs } 969163953Srrs } 970163953Srrs } 971179783Srrs if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 972170744Srrs sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 973170744Srrs } 974163953Srrs return (0); 975163953Srrs} 976163953Srrs 977163953Srrsint 978163953Srrssctp_t1init_timer(struct sctp_inpcb *inp, 979163953Srrs struct sctp_tcb *stcb, 980163953Srrs struct sctp_nets *net) 981163953Srrs{ 982163953Srrs /* bump the thresholds */ 983163953Srrs if (stcb->asoc.delayed_connection) { 984163953Srrs /* 985163953Srrs * special hook for delayed connection. The library did NOT 986163953Srrs * complete the rest of its sends. 987163953Srrs */ 988163953Srrs stcb->asoc.delayed_connection = 0; 989172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 990163953Srrs return (0); 991163953Srrs } 992163953Srrs if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) { 993163953Srrs return (0); 994163953Srrs } 995163953Srrs if (sctp_threshold_management(inp, stcb, net, 996163953Srrs stcb->asoc.max_init_times)) { 997163953Srrs /* Association was destroyed */ 998163953Srrs return (1); 999163953Srrs } 1000163953Srrs stcb->asoc.dropped_special_cnt = 0; 1001210599Srrs sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); 1002163953Srrs if (stcb->asoc.initial_init_rto_max < net->RTO) { 1003163953Srrs net->RTO = stcb->asoc.initial_init_rto_max; 1004163953Srrs } 1005163953Srrs if (stcb->asoc.numnets > 1) { 1006163953Srrs /* If we have more than one addr use it */ 1007163953Srrs struct sctp_nets *alt; 1008163953Srrs 1009163953Srrs alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1010214928Stuexen if (alt != stcb->asoc.primary_destination) { 1011212712Stuexen sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); 1012163953Srrs stcb->asoc.primary_destination = alt; 1013163953Srrs } 1014163953Srrs } 1015163953Srrs /* Send out a new init */ 1016172090Srrs sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1017163953Srrs return (0); 1018163953Srrs} 1019163953Srrs 1020163953Srrs/* 1021163953Srrs * For cookie and asconf we actually need to find and mark for resend, then 1022163953Srrs * increment the resend counter (after all the threshold management stuff of 1023163953Srrs * course). 1024163953Srrs */ 1025163953Srrsint 1026163953Srrssctp_cookie_timer(struct sctp_inpcb *inp, 1027163953Srrs struct sctp_tcb *stcb, 1028231038Stuexen struct sctp_nets *net SCTP_UNUSED) 1029163953Srrs{ 1030163953Srrs struct sctp_nets *alt; 1031163953Srrs struct sctp_tmit_chunk *cookie; 1032163953Srrs 1033163953Srrs /* first before all else we must find the cookie */ 1034163953Srrs TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1035163953Srrs if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1036163953Srrs break; 1037163953Srrs } 1038163953Srrs } 1039163953Srrs if (cookie == NULL) { 1040163953Srrs if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1041163953Srrs /* FOOBAR! */ 1042266181Stuexen struct mbuf *op_err; 1043163953Srrs 1044266181Stuexen op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, 1045266181Stuexen "Cookie timer expired, but no cookie"); 1046171440Srrs inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_4; 1047266181Stuexen sctp_abort_an_association(inp, stcb, op_err, SCTP_SO_NOT_LOCKED); 1048163953Srrs } else { 1049165220Srrs#ifdef INVARIANTS 1050163953Srrs panic("Cookie timer expires in wrong state?"); 1051163953Srrs#else 1052169420Srrs SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc)); 1053163953Srrs return (0); 1054163953Srrs#endif 1055163953Srrs } 1056163953Srrs return (0); 1057163953Srrs } 1058163953Srrs /* Ok we found the cookie, threshold management next */ 1059163953Srrs if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1060163953Srrs stcb->asoc.max_init_times)) { 1061163953Srrs /* Assoc is over */ 1062163953Srrs return (1); 1063163953Srrs } 1064163953Srrs /* 1065163953Srrs * cleared theshold management now lets backoff the address & select 1066163953Srrs * an alternate 1067163953Srrs */ 1068163953Srrs stcb->asoc.dropped_special_cnt = 0; 1069210599Srrs sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); 1070163953Srrs alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1071163953Srrs if (alt != cookie->whoTo) { 1072163953Srrs sctp_free_remote_addr(cookie->whoTo); 1073163953Srrs cookie->whoTo = alt; 1074163953Srrs atomic_add_int(&alt->ref_count, 1); 1075163953Srrs } 1076163953Srrs /* Now mark the retran info */ 1077163953Srrs if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1078163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1079163953Srrs } 1080163953Srrs cookie->sent = SCTP_DATAGRAM_RESEND; 1081163953Srrs /* 1082163953Srrs * Now call the output routine to kick out the cookie again, Note we 1083163953Srrs * don't mark any chunks for retran so that FR will need to kick in 1084163953Srrs * to move these (or a send timer). 1085163953Srrs */ 1086163953Srrs return (0); 1087163953Srrs} 1088163953Srrs 1089163953Srrsint 1090163953Srrssctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1091163953Srrs struct sctp_nets *net) 1092163953Srrs{ 1093163953Srrs struct sctp_nets *alt; 1094163953Srrs struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1095163953Srrs 1096163953Srrs if (stcb->asoc.stream_reset_outstanding == 0) { 1097163953Srrs return (0); 1098163953Srrs } 1099163953Srrs /* find the existing STRRESET, we use the seq number we sent out on */ 1100169420Srrs (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1101163953Srrs if (strrst == NULL) { 1102163953Srrs return (0); 1103163953Srrs } 1104163953Srrs /* do threshold management */ 1105163953Srrs if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1106163953Srrs stcb->asoc.max_send_times)) { 1107163953Srrs /* Assoc is over */ 1108163953Srrs return (1); 1109163953Srrs } 1110163953Srrs /* 1111163953Srrs * cleared theshold management now lets backoff the address & select 1112163953Srrs * an alternate 1113163953Srrs */ 1114210599Srrs sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0); 1115163953Srrs alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1116163953Srrs sctp_free_remote_addr(strrst->whoTo); 1117163953Srrs strrst->whoTo = alt; 1118163953Srrs atomic_add_int(&alt->ref_count, 1); 1119163953Srrs 1120163953Srrs /* See if a ECN Echo is also stranded */ 1121163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1122163953Srrs if ((chk->whoTo == net) && 1123163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1124163953Srrs sctp_free_remote_addr(chk->whoTo); 1125163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1126163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1127163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1128163953Srrs } 1129163953Srrs chk->whoTo = alt; 1130163953Srrs atomic_add_int(&alt->ref_count, 1); 1131163953Srrs } 1132163953Srrs } 1133224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1134163953Srrs /* 1135163953Srrs * If the address went un-reachable, we need to move to 1136163953Srrs * alternates for ALL chk's in queue 1137163953Srrs */ 1138212712Stuexen sctp_move_chunks_from_net(stcb, net); 1139163953Srrs } 1140163953Srrs /* mark the retran info */ 1141163953Srrs if (strrst->sent != SCTP_DATAGRAM_RESEND) 1142163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1143163953Srrs strrst->sent = SCTP_DATAGRAM_RESEND; 1144163953Srrs 1145163953Srrs /* restart the timer */ 1146163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1147163953Srrs return (0); 1148163953Srrs} 1149163953Srrs 1150163953Srrsint 1151163953Srrssctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1152163953Srrs struct sctp_nets *net) 1153163953Srrs{ 1154163953Srrs struct sctp_nets *alt; 1155216822Stuexen struct sctp_tmit_chunk *asconf, *chk; 1156163953Srrs 1157171572Srrs /* is this a first send, or a retransmission? */ 1158179157Srrs if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1159163953Srrs /* compose a new ASCONF chunk and send it */ 1160172190Srrs sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1161163953Srrs } else { 1162171572Srrs /* 1163171572Srrs * Retransmission of the existing ASCONF is needed 1164171572Srrs */ 1165163953Srrs 1166163953Srrs /* find the existing ASCONF */ 1167179157Srrs asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1168163953Srrs if (asconf == NULL) { 1169163953Srrs return (0); 1170163953Srrs } 1171163953Srrs /* do threshold management */ 1172163953Srrs if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1173163953Srrs stcb->asoc.max_send_times)) { 1174163953Srrs /* Assoc is over */ 1175163953Srrs return (1); 1176163953Srrs } 1177163953Srrs if (asconf->snd_count > stcb->asoc.max_send_times) { 1178163953Srrs /* 1179171572Srrs * Something is rotten: our peer is not responding 1180171572Srrs * to ASCONFs but apparently is to other chunks. 1181171572Srrs * i.e. it is not properly handling the chunk type 1182171572Srrs * upper bits. Mark this peer as ASCONF incapable 1183171572Srrs * and cleanup. 1184163953Srrs */ 1185169420Srrs SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1186163953Srrs sctp_asconf_cleanup(stcb, net); 1187163953Srrs return (0); 1188163953Srrs } 1189163953Srrs /* 1190171572Srrs * cleared threshold management, so now backoff the net and 1191171572Srrs * select an alternate 1192163953Srrs */ 1193210599Srrs sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0); 1194163953Srrs alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1195179157Srrs if (asconf->whoTo != alt) { 1196179157Srrs sctp_free_remote_addr(asconf->whoTo); 1197179157Srrs asconf->whoTo = alt; 1198179157Srrs atomic_add_int(&alt->ref_count, 1); 1199179157Srrs } 1200171572Srrs /* See if an ECN Echo is also stranded */ 1201163953Srrs TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1202163953Srrs if ((chk->whoTo == net) && 1203163953Srrs (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1204163953Srrs sctp_free_remote_addr(chk->whoTo); 1205163953Srrs chk->whoTo = alt; 1206163953Srrs if (chk->sent != SCTP_DATAGRAM_RESEND) { 1207163953Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1208163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1209163953Srrs } 1210163953Srrs atomic_add_int(&alt->ref_count, 1); 1211163953Srrs } 1212163953Srrs } 1213216822Stuexen TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) { 1214179157Srrs if (chk->whoTo != alt) { 1215179157Srrs sctp_free_remote_addr(chk->whoTo); 1216179157Srrs chk->whoTo = alt; 1217179157Srrs atomic_add_int(&alt->ref_count, 1); 1218179157Srrs } 1219179157Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1220179157Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1221179157Srrs chk->sent = SCTP_DATAGRAM_RESEND; 1222179157Srrs } 1223224641Stuexen if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 1224163953Srrs /* 1225163953Srrs * If the address went un-reachable, we need to move 1226171572Srrs * to the alternate for ALL chunks in queue 1227163953Srrs */ 1228212712Stuexen sctp_move_chunks_from_net(stcb, net); 1229163953Srrs } 1230163953Srrs /* mark the retran info */ 1231163953Srrs if (asconf->sent != SCTP_DATAGRAM_RESEND) 1232163953Srrs sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1233163953Srrs asconf->sent = SCTP_DATAGRAM_RESEND; 1234179157Srrs 1235179157Srrs /* send another ASCONF if any and we can do */ 1236179157Srrs sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1237163953Srrs } 1238163953Srrs return (0); 1239163953Srrs} 1240163953Srrs 1241172091Srrs/* Mobility adaptation */ 1242172156Srrsvoid 1243172091Srrssctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1244231038Stuexen struct sctp_nets *net SCTP_UNUSED) 1245172091Srrs{ 1246172091Srrs if (stcb->asoc.deleted_primary == NULL) { 1247172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1248172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1249172156Srrs return; 1250172091Srrs } 1251172091Srrs SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1252172091Srrs SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1253172091Srrs sctp_free_remote_addr(stcb->asoc.deleted_primary); 1254172091Srrs stcb->asoc.deleted_primary = NULL; 1255172091Srrs sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1256172156Srrs return; 1257172091Srrs} 1258172091Srrs 1259163953Srrs/* 1260163953Srrs * For the shutdown and shutdown-ack, we do not keep one around on the 1261163953Srrs * control queue. This means we must generate a new one and call the general 1262163953Srrs * chunk output routine, AFTER having done threshold management. 1263214928Stuexen * It is assumed that net is non-NULL. 1264163953Srrs */ 1265163953Srrsint 1266163953Srrssctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1267163953Srrs struct sctp_nets *net) 1268163953Srrs{ 1269163953Srrs struct sctp_nets *alt; 1270163953Srrs 1271163953Srrs /* first threshold managment */ 1272163953Srrs if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1273163953Srrs /* Assoc is over */ 1274163953Srrs return (1); 1275163953Srrs } 1276214928Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1277163953Srrs /* second select an alternative */ 1278163953Srrs alt = sctp_find_alternate_net(stcb, net, 0); 1279163953Srrs 1280163953Srrs /* third generate a shutdown into the queue for out net */ 1281214928Stuexen sctp_send_shutdown(stcb, alt); 1282214928Stuexen 1283163953Srrs /* fourth restart timer */ 1284163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1285163953Srrs return (0); 1286163953Srrs} 1287163953Srrs 1288163953Srrsint 1289163953Srrssctp_shutdownack_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 */ 1304163953Srrs sctp_send_shutdown_ack(stcb, alt); 1305163953Srrs 1306163953Srrs /* fourth restart timer */ 1307163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1308163953Srrs return (0); 1309163953Srrs} 1310163953Srrs 1311163953Srrsstatic void 1312163953Srrssctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1313163953Srrs struct sctp_tcb *stcb) 1314163953Srrs{ 1315163953Srrs struct sctp_stream_queue_pending *sp; 1316217760Stuexen unsigned int i, chks_in_queue = 0; 1317163953Srrs int being_filled = 0; 1318163953Srrs 1319163953Srrs /* 1320163953Srrs * This function is ONLY called when the send/sent queues are empty. 1321163953Srrs */ 1322163953Srrs if ((stcb == NULL) || (inp == NULL)) 1323163953Srrs return; 1324163953Srrs 1325163953Srrs if (stcb->asoc.sent_queue_retran_cnt) { 1326169420Srrs SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1327163953Srrs stcb->asoc.sent_queue_retran_cnt); 1328163953Srrs stcb->asoc.sent_queue_retran_cnt = 0; 1329163953Srrs } 1330217760Stuexen if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1331218241Stuexen /* No stream scheduler information, initialize scheduler */ 1332218241Stuexen stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0); 1333218241Stuexen if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { 1334218241Stuexen /* yep, we lost a stream or two */ 1335218241Stuexen SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n"); 1336163953Srrs } else { 1337218241Stuexen /* no streams lost */ 1338163953Srrs stcb->asoc.total_output_queue_size = 0; 1339163953Srrs } 1340163953Srrs } 1341163953Srrs /* Check to see if some data queued, if so report it */ 1342217760Stuexen for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1343217760Stuexen if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1344217760Stuexen TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 1345163953Srrs if (sp->msg_is_complete) 1346163953Srrs being_filled++; 1347163953Srrs chks_in_queue++; 1348163953Srrs } 1349163953Srrs } 1350163953Srrs } 1351163953Srrs if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1352169420Srrs SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1353163953Srrs stcb->asoc.stream_queue_cnt, chks_in_queue); 1354163953Srrs } 1355163953Srrs if (chks_in_queue) { 1356163953Srrs /* call the output queue function */ 1357172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1358163953Srrs if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1359163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1360163953Srrs /* 1361163953Srrs * Probably should go in and make it go back through 1362163953Srrs * and add fragments allowed 1363163953Srrs */ 1364163953Srrs if (being_filled == 0) { 1365169420Srrs SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1366163953Srrs chks_in_queue); 1367163953Srrs } 1368163953Srrs } 1369163953Srrs } else { 1370169420Srrs SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1371163953Srrs (u_long)stcb->asoc.total_output_queue_size); 1372163953Srrs stcb->asoc.total_output_queue_size = 0; 1373163953Srrs } 1374163953Srrs} 1375163953Srrs 1376163953Srrsint 1377163953Srrssctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1378224641Stuexen struct sctp_nets *net) 1379163953Srrs{ 1380224641Stuexen uint8_t net_was_pf; 1381171440Srrs 1382231039Stuexen if (net->dest_state & SCTP_ADDR_PF) { 1383231039Stuexen net_was_pf = 1; 1384231039Stuexen } else { 1385231039Stuexen net_was_pf = 0; 1386231039Stuexen } 1387231039Stuexen if (net->hb_responded == 0) { 1388231039Stuexen if (net->ro._s_addr) { 1389231039Stuexen /* 1390231039Stuexen * Invalidate the src address if we did not get a 1391231039Stuexen * response last time. 1392231039Stuexen */ 1393231039Stuexen sctp_free_ifa(net->ro._s_addr); 1394231039Stuexen net->ro._s_addr = NULL; 1395231039Stuexen net->src_addr_selected = 0; 1396224641Stuexen } 1397231039Stuexen sctp_backoff_on_timeout(stcb, net, 1, 0, 0); 1398231039Stuexen if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1399231039Stuexen /* Assoc is over */ 1400231039Stuexen return (1); 1401163953Srrs } 1402163953Srrs } 1403231039Stuexen /* Zero PBA, if it needs it */ 1404231039Stuexen if (net->partial_bytes_acked) { 1405231039Stuexen net->partial_bytes_acked = 0; 1406231039Stuexen } 1407163953Srrs if ((stcb->asoc.total_output_queue_size > 0) && 1408163953Srrs (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1409163953Srrs (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1410163953Srrs sctp_audit_stream_queues_for_size(inp, stcb); 1411163953Srrs } 1412224641Stuexen if (!(net->dest_state & SCTP_ADDR_NOHB) && 1413224641Stuexen !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) { 1414163953Srrs /* 1415224641Stuexen * when move to PF during threshold mangement, a HB has been 1416224641Stuexen * queued in that routine 1417163953Srrs */ 1418234793Stuexen uint32_t ms_gone_by; 1419234793Stuexen 1420234793Stuexen if ((net->last_sent_time.tv_sec > 0) || 1421234793Stuexen (net->last_sent_time.tv_usec > 0)) { 1422234793Stuexen struct timeval diff; 1423234793Stuexen 1424234793Stuexen SCTP_GETTIME_TIMEVAL(&diff); 1425234793Stuexen timevalsub(&diff, &net->last_sent_time); 1426234793Stuexen ms_gone_by = (uint32_t) (diff.tv_sec * 1000) + 1427234793Stuexen (uint32_t) (diff.tv_usec / 1000); 1428234793Stuexen } else { 1429234793Stuexen ms_gone_by = 0xffffffff; 1430234793Stuexen } 1431234793Stuexen if ((ms_gone_by >= net->heart_beat_delay) || 1432234793Stuexen (net->dest_state & SCTP_ADDR_PF)) { 1433234793Stuexen sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); 1434234793Stuexen } 1435163953Srrs } 1436163953Srrs return (0); 1437163953Srrs} 1438163953Srrs 1439163953Srrsvoid 1440163953Srrssctp_pathmtu_timer(struct sctp_inpcb *inp, 1441163953Srrs struct sctp_tcb *stcb, 1442163953Srrs struct sctp_nets *net) 1443163953Srrs{ 1444179157Srrs uint32_t next_mtu, mtu; 1445163953Srrs 1446231038Stuexen next_mtu = sctp_get_next_mtu(net->mtu); 1447169352Srrs 1448179157Srrs if ((next_mtu > net->mtu) && (net->port == 0)) { 1449169352Srrs if ((net->src_addr_selected == 0) || 1450169352Srrs (net->ro._s_addr == NULL) || 1451169352Srrs (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1452169420Srrs if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1453169352Srrs sctp_free_ifa(net->ro._s_addr); 1454169352Srrs net->ro._s_addr = NULL; 1455169352Srrs net->src_addr_selected = 0; 1456169420Srrs } else if (net->ro._s_addr == NULL) { 1457179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1458179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1459179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1460179157Srrs 1461179157Srrs /* KAME hack: embed scopeid */ 1462197288Srrs (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 1463179157Srrs } 1464179157Srrs#endif 1465179157Srrs 1466169420Srrs net->ro._s_addr = sctp_source_address_selection(inp, 1467169420Srrs stcb, 1468169420Srrs (sctp_route_t *) & net->ro, 1469169420Srrs net, 0, stcb->asoc.vrf_id); 1470179157Srrs#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1471179157Srrs if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1472179157Srrs struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1473179157Srrs 1474179157Srrs (void)sa6_recoverscope(sin6); 1475179157Srrs } 1476179157Srrs#endif /* INET6 */ 1477169352Srrs } 1478169352Srrs if (net->ro._s_addr) 1479169352Srrs net->src_addr_selected = 1; 1480169352Srrs } 1481169352Srrs if (net->ro._s_addr) { 1482169352Srrs mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); 1483185694Srrs if (net->port) { 1484185694Srrs mtu -= sizeof(struct udphdr); 1485185694Srrs } 1486169352Srrs if (mtu > next_mtu) { 1487163953Srrs net->mtu = next_mtu; 1488163953Srrs } 1489163953Srrs } 1490163953Srrs } 1491163953Srrs /* restart the timer */ 1492163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 1493163953Srrs} 1494163953Srrs 1495163953Srrsvoid 1496163953Srrssctp_autoclose_timer(struct sctp_inpcb *inp, 1497163953Srrs struct sctp_tcb *stcb, 1498163953Srrs struct sctp_nets *net) 1499163953Srrs{ 1500163953Srrs struct timeval tn, *tim_touse; 1501163953Srrs struct sctp_association *asoc; 1502163953Srrs int ticks_gone_by; 1503163953Srrs 1504169378Srrs (void)SCTP_GETTIME_TIMEVAL(&tn); 1505163953Srrs if (stcb->asoc.sctp_autoclose_ticks && 1506163953Srrs sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { 1507163953Srrs /* Auto close is on */ 1508163953Srrs asoc = &stcb->asoc; 1509163953Srrs /* pick the time to use */ 1510163953Srrs if (asoc->time_last_rcvd.tv_sec > 1511163953Srrs asoc->time_last_sent.tv_sec) { 1512163953Srrs tim_touse = &asoc->time_last_rcvd; 1513163953Srrs } else { 1514163953Srrs tim_touse = &asoc->time_last_sent; 1515163953Srrs } 1516163953Srrs /* Now has long enough transpired to autoclose? */ 1517163953Srrs ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec); 1518163953Srrs if ((ticks_gone_by > 0) && 1519163953Srrs (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) { 1520163953Srrs /* 1521163953Srrs * autoclose time has hit, call the output routine, 1522163953Srrs * which should do nothing just to be SURE we don't 1523163953Srrs * have hanging data. We can then safely check the 1524163953Srrs * queues and know that we are clear to send 1525163953Srrs * shutdown 1526163953Srrs */ 1527172090Srrs sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); 1528163953Srrs /* Are we clean? */ 1529163953Srrs if (TAILQ_EMPTY(&asoc->send_queue) && 1530163953Srrs TAILQ_EMPTY(&asoc->sent_queue)) { 1531163953Srrs /* 1532163953Srrs * there is nothing queued to send, so I'm 1533163953Srrs * done... 1534163953Srrs */ 1535166675Srrs if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) { 1536163953Srrs /* only send SHUTDOWN 1st time thru */ 1537224641Stuexen struct sctp_nets *netp; 1538224641Stuexen 1539252960Stuexen if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 1540252960Stuexen (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 1541252960Stuexen SCTP_STAT_DECR_GAUGE32(sctps_currestab); 1542252960Stuexen } 1543252960Stuexen SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 1544252960Stuexen SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 1545252960Stuexen sctp_stop_timers_for_shutdown(stcb); 1546224641Stuexen if (stcb->asoc.alternate) { 1547224641Stuexen netp = stcb->asoc.alternate; 1548224641Stuexen } else { 1549224641Stuexen netp = stcb->asoc.primary_destination; 1550224641Stuexen } 1551224641Stuexen sctp_send_shutdown(stcb, netp); 1552163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 1553163953Srrs stcb->sctp_ep, stcb, 1554224641Stuexen netp); 1555163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 1556163953Srrs stcb->sctp_ep, stcb, 1557224641Stuexen netp); 1558163953Srrs } 1559163953Srrs } 1560163953Srrs } else { 1561163953Srrs /* 1562163953Srrs * No auto close at this time, reset t-o to check 1563163953Srrs * later 1564163953Srrs */ 1565163953Srrs int tmp; 1566163953Srrs 1567163953Srrs /* fool the timer startup to use the time left */ 1568163953Srrs tmp = asoc->sctp_autoclose_ticks; 1569163953Srrs asoc->sctp_autoclose_ticks -= ticks_gone_by; 1570163953Srrs sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, 1571163953Srrs net); 1572163953Srrs /* restore the real tick value */ 1573163953Srrs asoc->sctp_autoclose_ticks = tmp; 1574163953Srrs } 1575163953Srrs } 1576163953Srrs} 1577