40#endif 41#include <netinet/sctp_var.h> 42#include <netinet/sctp_sysctl.h> 43#include <netinet/sctp_timer.h> 44#include <netinet/sctputil.h> 45#include <netinet/sctp_output.h> 46#include <netinet/sctp_header.h> 47#include <netinet/sctp_indata.h> 48#include <netinet/sctp_asconf.h> 49#include <netinet/sctp_input.h> 50#include <netinet/sctp.h> 51#include <netinet/sctp_uio.h> 52 53 54 55void 56sctp_early_fr_timer(struct sctp_inpcb *inp, 57 struct sctp_tcb *stcb, 58 struct sctp_nets *net) 59{ 60 struct sctp_tmit_chunk *chk, *tp2; 61 struct timeval now, min_wait, tv; 62 unsigned int cur_rtt, cnt = 0, cnt_resend = 0; 63 64 /* an early FR is occuring. */ 65 (void)SCTP_GETTIME_TIMEVAL(&now); 66 /* get cur rto in micro-seconds */ 67 if (net->lastsa == 0) { 68 /* Hmm no rtt estimate yet? */ 69 cur_rtt = stcb->asoc.initial_rto >> 2; 70 } else { 71 72 cur_rtt = ((net->lastsa >> 2) + net->lastsv) >> 1; 73 } 74 if (cur_rtt < SCTP_BASE_SYSCTL(sctp_early_fr_msec)) { 75 cur_rtt = SCTP_BASE_SYSCTL(sctp_early_fr_msec); 76 } 77 cur_rtt *= 1000; 78 tv.tv_sec = cur_rtt / 1000000; 79 tv.tv_usec = cur_rtt % 1000000; 80 min_wait = now; 81 timevalsub(&min_wait, &tv); 82 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 83 /* 84 * if we hit here, we don't have enough seconds on the clock 85 * to account for the RTO. We just let the lower seconds be 86 * the bounds and don't worry about it. This may mean we 87 * will mark a lot more than we should. 88 */ 89 min_wait.tv_sec = min_wait.tv_usec = 0; 90 } 91 chk = TAILQ_LAST(&stcb->asoc.sent_queue, sctpchunk_listhead); 92 for (; chk != NULL; chk = tp2) { 93 tp2 = TAILQ_PREV(chk, sctpchunk_listhead, sctp_next); 94 if (chk->whoTo != net) { 95 continue; 96 } 97 if (chk->sent == SCTP_DATAGRAM_RESEND) 98 cnt_resend++; 99 else if ((chk->sent > SCTP_DATAGRAM_UNSENT) && 100 (chk->sent < SCTP_DATAGRAM_RESEND)) { 101 /* pending, may need retran */ 102 if (chk->sent_rcv_time.tv_sec > min_wait.tv_sec) { 103 /* 104 * we have reached a chunk that was sent 105 * some seconds past our min.. forget it we 106 * will find no more to send. 107 */ 108 continue; 109 } else if (chk->sent_rcv_time.tv_sec == min_wait.tv_sec) { 110 /* 111 * we must look at the micro seconds to 112 * know. 113 */ 114 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 115 /* 116 * ok it was sent after our boundary 117 * time. 118 */ 119 continue; 120 } 121 } 122 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_EARLYFR_LOGGING_ENABLE) { 123 sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 124 4, SCTP_FR_MARKED_EARLY); 125 } 126 SCTP_STAT_INCR(sctps_earlyfrmrkretrans); 127 chk->sent = SCTP_DATAGRAM_RESEND; 128 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 129 /* double book size since we are doing an early FR */ 130 chk->book_size_scale++; 131 cnt += chk->send_size; 132 if ((cnt + net->flight_size) > net->cwnd) { 133 /* Mark all we could possibly resend */ 134 break; 135 } 136 } 137 } 138 if (cnt) { 139 /* 140 * JRS - Use the congestion control given in the congestion 141 * control module 142 */ 143 stcb->asoc.cc_functions.sctp_cwnd_update_after_fr_timer(inp, stcb, net); 144 } else if (cnt_resend) { 145 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_EARLY_FR_TMR, SCTP_SO_NOT_LOCKED); 146 } 147 /* Restart it? */ 148 if (net->flight_size < net->cwnd) { 149 SCTP_STAT_INCR(sctps_earlyfrstrtmr); 150 sctp_timer_start(SCTP_TIMER_TYPE_EARLYFR, stcb->sctp_ep, stcb, net); 151 } 152} 153 154void 155sctp_audit_retranmission_queue(struct sctp_association *asoc) 156{ 157 struct sctp_tmit_chunk *chk; 158 159 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n", 160 asoc->sent_queue_retran_cnt, 161 asoc->sent_queue_cnt); 162 asoc->sent_queue_retran_cnt = 0; 163 asoc->sent_queue_cnt = 0; 164 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 165 if (chk->sent == SCTP_DATAGRAM_RESEND) { 166 sctp_ucount_incr(asoc->sent_queue_retran_cnt); 167 } 168 asoc->sent_queue_cnt++; 169 } 170 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 171 if (chk->sent == SCTP_DATAGRAM_RESEND) { 172 sctp_ucount_incr(asoc->sent_queue_retran_cnt); 173 } 174 } 175 TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) { 176 if (chk->sent == SCTP_DATAGRAM_RESEND) { 177 sctp_ucount_incr(asoc->sent_queue_retran_cnt); 178 } 179 } 180 SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n", 181 asoc->sent_queue_retran_cnt, 182 asoc->sent_queue_cnt); 183} 184 185int 186sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 187 struct sctp_nets *net, uint16_t threshold) 188{ 189 if (net) { 190 net->error_count++; 191 SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n", 192 net, net->error_count, 193 net->failure_threshold); 194 if (net->error_count > net->failure_threshold) { 195 /* We had a threshold failure */ 196 if (net->dest_state & SCTP_ADDR_REACHABLE) { 197 net->dest_state &= ~SCTP_ADDR_REACHABLE; 198 net->dest_state |= SCTP_ADDR_NOT_REACHABLE; 199 net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; 200 if (net == stcb->asoc.primary_destination) { 201 net->dest_state |= SCTP_ADDR_WAS_PRIMARY; 202 } 203 /* 204 * JRS 5/14/07 - If a destination is 205 * unreachable, the PF bit is turned off. 206 * This allows an unambiguous use of the PF 207 * bit for destinations that are reachable 208 * but potentially failed. If the 209 * destination is set to the unreachable 210 * state, also set the destination to the PF 211 * state. 212 */ 213 /* 214 * Add debug message here if destination is 215 * not in PF state. 216 */ 217 /* Stop any running T3 timers here? */ 218 if (SCTP_BASE_SYSCTL(sctp_cmt_on_off) && SCTP_BASE_SYSCTL(sctp_cmt_pf)) { 219 net->dest_state &= ~SCTP_ADDR_PF; 220 SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from PF to unreachable.\n", 221 net); 222 } 223 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 224 stcb, 225 SCTP_FAILED_THRESHOLD, 226 (void *)net, SCTP_SO_NOT_LOCKED); 227 } 228 } 229 /*********HOLD THIS COMMENT FOR PATCH OF ALTERNATE 230 *********ROUTING CODE 231 */ 232 /*********HOLD THIS COMMENT FOR END OF PATCH OF ALTERNATE 233 *********ROUTING CODE 234 */ 235 } 236 if (stcb == NULL) 237 return (0); 238 239 if (net) { 240 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { 241 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 242 sctp_misc_ints(SCTP_THRESHOLD_INCR, 243 stcb->asoc.overall_error_count, 244 (stcb->asoc.overall_error_count + 1), 245 SCTP_FROM_SCTP_TIMER, 246 __LINE__); 247 } 248 stcb->asoc.overall_error_count++; 249 } 250 } else { 251 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { 252 sctp_misc_ints(SCTP_THRESHOLD_INCR, 253 stcb->asoc.overall_error_count, 254 (stcb->asoc.overall_error_count + 1), 255 SCTP_FROM_SCTP_TIMER, 256 __LINE__); 257 } 258 stcb->asoc.overall_error_count++; 259 } 260 SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n", 261 &stcb->asoc, stcb->asoc.overall_error_count, 262 (uint32_t) threshold, 263 ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state)); 264 /* 265 * We specifically do not do >= to give the assoc one more change 266 * before we fail it. 267 */ 268 if (stcb->asoc.overall_error_count > threshold) { 269 /* Abort notification sends a ULP notify */ 270 struct mbuf *oper; 271 272 oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 273 0, M_DONTWAIT, 1, MT_DATA); 274 if (oper) { 275 struct sctp_paramhdr *ph; 276 uint32_t *ippp; 277 278 SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) + 279 sizeof(uint32_t); 280 ph = mtod(oper, struct sctp_paramhdr *); 281 ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 282 ph->param_length = htons(SCTP_BUF_LEN(oper)); 283 ippp = (uint32_t *) (ph + 1); 284 *ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); 285 } 286 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1; 287 printf("Aborting association threshold:%d overall error count:%d\n", 288 threshold, 289 stcb->asoc.overall_error_count); 290 sctp_abort_an_association(inp, stcb, SCTP_FAILED_THRESHOLD, oper, SCTP_SO_NOT_LOCKED); 291 return (1); 292 } 293 return (0); 294} 295 296struct sctp_nets * 297sctp_find_alternate_net(struct sctp_tcb *stcb, 298 struct sctp_nets *net, 299 int mode) 300{ 301 /* Find and return an alternate network if possible */ 302 struct sctp_nets *alt, *mnet, *min_errors_net = NULL, *max_cwnd_net = NULL; 303 int once; 304 305 /* JRS 5/14/07 - Initialize min_errors to an impossible value. */ 306 int min_errors = -1; 307 uint32_t max_cwnd = 0; 308 309 if (stcb->asoc.numnets == 1) { 310 /* No others but net */ 311 return (TAILQ_FIRST(&stcb->asoc.nets)); 312 } 313 /* 314 * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate 315 * net algorithm. This algorithm chooses the active destination (not 316 * in PF state) with the largest cwnd value. If all destinations are 317 * in PF state, unreachable, or unconfirmed, choose the desination 318 * that is in PF state with the lowest error count. In case of a 319 * tie, choose the destination that was most recently active. 320 */ 321 if (mode == 2) { 322 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 323 /* 324 * JRS 5/14/07 - If the destination is unreachable 325 * or unconfirmed, skip it. 326 */ 327 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 328 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { 329 continue; 330 } 331 /* 332 * JRS 5/14/07 - If the destination is reachable 333 * but in PF state, compare the error count of the 334 * destination to the minimum error count seen thus 335 * far. Store the destination with the lower error 336 * count. If the error counts are equal, store the 337 * destination that was most recently active. 338 */ 339 if (mnet->dest_state & SCTP_ADDR_PF) { 340 /* 341 * JRS 5/14/07 - If the destination under 342 * consideration is the current destination, 343 * work as if the error count is one higher. 344 * The actual error count will not be 345 * incremented until later in the t3 346 * handler. 347 */ 348 if (mnet == net) { 349 if (min_errors == -1) { 350 min_errors = mnet->error_count + 1; 351 min_errors_net = mnet; 352 } else if (mnet->error_count + 1 < min_errors) { 353 min_errors = mnet->error_count + 1; 354 min_errors_net = mnet; 355 } else if (mnet->error_count + 1 == min_errors 356 && mnet->last_active > min_errors_net->last_active) { 357 min_errors_net = mnet; 358 min_errors = mnet->error_count + 1; 359 } 360 continue; 361 } else { 362 if (min_errors == -1) { 363 min_errors = mnet->error_count; 364 min_errors_net = mnet; 365 } else if (mnet->error_count < min_errors) { 366 min_errors = mnet->error_count; 367 min_errors_net = mnet; 368 } else if (mnet->error_count == min_errors 369 && mnet->last_active > min_errors_net->last_active) { 370 min_errors_net = mnet; 371 min_errors = mnet->error_count; 372 } 373 continue; 374 } 375 } 376 /* 377 * JRS 5/14/07 - If the destination is reachable and 378 * not in PF state, compare the cwnd of the 379 * destination to the highest cwnd seen thus far. 380 * Store the destination with the higher cwnd value. 381 * If the cwnd values are equal, randomly choose one 382 * of the two destinations. 383 */ 384 if (max_cwnd < mnet->cwnd) { 385 max_cwnd_net = mnet; 386 max_cwnd = mnet->cwnd; 387 } else if (max_cwnd == mnet->cwnd) { 388 uint32_t rndval; 389 uint8_t this_random; 390 391 if (stcb->asoc.hb_random_idx > 3) { 392 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 393 memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values)); 394 this_random = stcb->asoc.hb_random_values[0]; 395 stcb->asoc.hb_random_idx++; 396 stcb->asoc.hb_ect_randombit = 0; 397 } else { 398 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 399 stcb->asoc.hb_random_idx++; 400 stcb->asoc.hb_ect_randombit = 0; 401 } 402 if (this_random % 2 == 1) { 403 max_cwnd_net = mnet;
|
405 } 406 } 407 } 408 /* 409 * JRS 5/14/07 - After all destination have been considered 410 * as alternates, check to see if there was some active 411 * destination (not in PF state). If not, check to see if 412 * there was some PF destination with the minimum number of 413 * errors. If not, return the original destination. If 414 * there is a min_errors_net, remove the PF flag from that 415 * destination, set the cwnd to one or two MTUs, and return 416 * the destination as an alt. If there was some active 417 * destination with a highest cwnd, return the destination 418 * as an alt. 419 */ 420 if (max_cwnd_net == NULL) { 421 if (min_errors_net == NULL) { 422 return (net); 423 } 424 min_errors_net->dest_state &= ~SCTP_ADDR_PF; 425 min_errors_net->cwnd = min_errors_net->mtu * SCTP_BASE_SYSCTL(sctp_cmt_pf); 426 if (SCTP_OS_TIMER_PENDING(&min_errors_net->rxt_timer.timer)) { 427 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, 428 stcb, min_errors_net, 429 SCTP_FROM_SCTP_TIMER + SCTP_LOC_2); 430 } 431 SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from PF to active with %d errors.\n", 432 min_errors_net, min_errors_net->error_count); 433 return (min_errors_net); 434 } else { 435 return (max_cwnd_net); 436 } 437 } 438 /* 439 * JRS 5/14/07 - If mode is set to 1, use the CMT policy for 440 * choosing an alternate net. 441 */ 442 else if (mode == 1) { 443 TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { 444 if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || 445 (mnet->dest_state & SCTP_ADDR_UNCONFIRMED) 446 ) { 447 /* 448 * will skip ones that are not-reachable or 449 * unconfirmed 450 */ 451 continue; 452 } 453 if (max_cwnd < mnet->cwnd) { 454 max_cwnd_net = mnet; 455 max_cwnd = mnet->cwnd; 456 } else if (max_cwnd == mnet->cwnd) { 457 uint32_t rndval; 458 uint8_t this_random; 459 460 if (stcb->asoc.hb_random_idx > 3) { 461 rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 462 memcpy(stcb->asoc.hb_random_values, &rndval, 463 sizeof(stcb->asoc.hb_random_values)); 464 this_random = stcb->asoc.hb_random_values[0]; 465 stcb->asoc.hb_random_idx = 0; 466 stcb->asoc.hb_ect_randombit = 0; 467 } else { 468 this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; 469 stcb->asoc.hb_random_idx++; 470 stcb->asoc.hb_ect_randombit = 0; 471 } 472 if (this_random % 2) { 473 max_cwnd_net = mnet; 474 max_cwnd = mnet->cwnd; 475 } 476 } 477 } 478 if (max_cwnd_net) { 479 return (max_cwnd_net); 480 } 481 } 482 mnet = net; 483 once = 0; 484 485 if (mnet == NULL) { 486 mnet = TAILQ_FIRST(&stcb->asoc.nets); 487 } 488 do { 489 alt = TAILQ_NEXT(mnet, sctp_next); 490 if (alt == NULL) { 491 once++; 492 if (once > 1) { 493 break; 494 } 495 alt = TAILQ_FIRST(&stcb->asoc.nets); 496 } 497 if (alt->ro.ro_rt == NULL) { 498 if (alt->ro._s_addr) { 499 sctp_free_ifa(alt->ro._s_addr); 500 alt->ro._s_addr = NULL; 501 } 502 alt->src_addr_selected = 0; 503 } 504 if ( 505 ((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && 506 (alt->ro.ro_rt != NULL) && 507 /* sa_ignore NO_NULL_CHK */ 508 (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) 509 ) { 510 /* Found a reachable address */ 511 break; 512 } 513 mnet = alt; 514 } while (alt != NULL); 515 516 if (alt == NULL) { 517 /* Case where NO insv network exists (dormant state) */ 518 /* we rotate destinations */ 519 once = 0; 520 mnet = net; 521 do { 522 alt = TAILQ_NEXT(mnet, sctp_next); 523 if (alt == NULL) { 524 once++; 525 if (once > 1) { 526 break; 527 } 528 alt = TAILQ_FIRST(&stcb->asoc.nets); 529 } 530 /* sa_ignore NO_NULL_CHK */ 531 if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) && 532 (alt != net)) { 533 /* Found an alternate address */ 534 break; 535 } 536 mnet = alt; 537 } while (alt != NULL); 538 } 539 if (alt == NULL) { 540 return (net); 541 } 542 return (alt); 543} 544 545 546 547static void 548sctp_backoff_on_timeout(struct sctp_tcb *stcb, 549 struct sctp_nets *net, 550 int win_probe, 551 int num_marked) 552{ 553 if (net->RTO == 0) { 554 net->RTO = stcb->asoc.minrto; 555 } 556 net->RTO <<= 1; 557 if (net->RTO > stcb->asoc.maxrto) { 558 net->RTO = stcb->asoc.maxrto; 559 } 560 if ((win_probe == 0) && num_marked) { 561 /* We don't apply penalty to window probe scenarios */ 562 /* JRS - Use the congestion control given in the CC module */ 563 stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); 564 } 565} 566 567static int 568sctp_mark_all_for_resend(struct sctp_tcb *stcb, 569 struct sctp_nets *net, 570 struct sctp_nets *alt, 571 int window_probe, 572 int *num_marked) 573{ 574 575 /* 576 * Mark all chunks (well not all) that were sent to *net for 577 * retransmission. Move them to alt for there destination as well... 578 * We only mark chunks that have been outstanding long enough to 579 * have received feed-back. 580 */ 581 struct sctp_tmit_chunk *chk, *tp2, *could_be_sent = NULL; 582 struct sctp_nets *lnets; 583 struct timeval now, min_wait, tv; 584 int cur_rtt; 585 int audit_tf, num_mk, fir; 586 unsigned int cnt_mk; 587 uint32_t orig_flight, orig_tf; 588 uint32_t tsnlast, tsnfirst; 589 590 591 /* none in flight now */ 592 audit_tf = 0; 593 fir = 0; 594 /* 595 * figure out how long a data chunk must be pending before we can 596 * mark it .. 597 */ 598 (void)SCTP_GETTIME_TIMEVAL(&now); 599 /* get cur rto in micro-seconds */ 600 cur_rtt = (((net->lastsa >> 2) + net->lastsv) >> 1); 601 cur_rtt *= 1000; 602 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 603 sctp_log_fr(cur_rtt, 604 stcb->asoc.peers_rwnd, 605 window_probe, 606 SCTP_FR_T3_MARK_TIME); 607 sctp_log_fr(net->flight_size, 608 SCTP_OS_TIMER_PENDING(&net->fr_timer.timer), 609 SCTP_OS_TIMER_ACTIVE(&net->fr_timer.timer), 610 SCTP_FR_CWND_REPORT); 611 sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); 612 } 613 tv.tv_sec = cur_rtt / 1000000; 614 tv.tv_usec = cur_rtt % 1000000; 615 min_wait = now; 616 timevalsub(&min_wait, &tv); 617 if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { 618 /* 619 * if we hit here, we don't have enough seconds on the clock 620 * to account for the RTO. We just let the lower seconds be 621 * the bounds and don't worry about it. This may mean we 622 * will mark a lot more than we should. 623 */ 624 min_wait.tv_sec = min_wait.tv_usec = 0; 625 } 626 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 627 sctp_log_fr(cur_rtt, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); 628 sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); 629 } 630 /* 631 * Our rwnd will be incorrect here since we are not adding back the 632 * cnt * mbuf but we will fix that down below. 633 */ 634 orig_flight = net->flight_size; 635 orig_tf = stcb->asoc.total_flight; 636 637 net->fast_retran_ip = 0; 638 /* Now on to each chunk */ 639 num_mk = cnt_mk = 0; 640 tsnfirst = tsnlast = 0; 641 chk = TAILQ_FIRST(&stcb->asoc.sent_queue); 642 for (; chk != NULL; chk = tp2) { 643 tp2 = TAILQ_NEXT(chk, sctp_next); 644 if ((compare_with_wrap(stcb->asoc.last_acked_seq, 645 chk->rec.data.TSN_seq, 646 MAX_TSN)) || 647 (stcb->asoc.last_acked_seq == chk->rec.data.TSN_seq)) { 648 /* Strange case our list got out of order? */ 649 SCTP_PRINTF("Our list is out of order?\n"); 650 panic("Out of order list"); 651 } 652 if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { 653 /* 654 * found one to mark: If it is less than 655 * DATAGRAM_ACKED it MUST not be a skipped or marked 656 * TSN but instead one that is either already set 657 * for retransmission OR one that needs 658 * retransmission. 659 */ 660 661 /* validate its been outstanding long enough */ 662 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 663 sctp_log_fr(chk->rec.data.TSN_seq, 664 chk->sent_rcv_time.tv_sec, 665 chk->sent_rcv_time.tv_usec, 666 SCTP_FR_T3_MARK_TIME); 667 } 668 if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { 669 /* 670 * we have reached a chunk that was sent 671 * some seconds past our min.. forget it we 672 * will find no more to send. 673 */ 674 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 675 sctp_log_fr(0, 676 chk->sent_rcv_time.tv_sec, 677 chk->sent_rcv_time.tv_usec, 678 SCTP_FR_T3_STOPPED); 679 } 680 continue; 681 } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && 682 (window_probe == 0)) { 683 /* 684 * we must look at the micro seconds to 685 * know. 686 */ 687 if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { 688 /* 689 * ok it was sent after our boundary 690 * time. 691 */ 692 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 693 sctp_log_fr(0, 694 chk->sent_rcv_time.tv_sec, 695 chk->sent_rcv_time.tv_usec, 696 SCTP_FR_T3_STOPPED); 697 } 698 continue; 699 } 700 } 701 if (PR_SCTP_TTL_ENABLED(chk->flags)) { 702 /* Is it expired? */ 703 if ((now.tv_sec > chk->rec.data.timetodrop.tv_sec) || 704 ((chk->rec.data.timetodrop.tv_sec == now.tv_sec) && 705 (now.tv_usec > chk->rec.data.timetodrop.tv_usec))) { 706 /* Yes so drop it */ 707 if (chk->data) { 708 (void)sctp_release_pr_sctp_chunk(stcb, 709 chk, 710 (SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT), 711 &stcb->asoc.sent_queue, SCTP_SO_NOT_LOCKED); 712 } 713 } 714 continue; 715 } 716 if (PR_SCTP_RTX_ENABLED(chk->flags)) { 717 /* Has it been retransmitted tv_sec times? */ 718 if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { 719 if (chk->data) { 720 (void)sctp_release_pr_sctp_chunk(stcb, 721 chk, 722 (SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT), 723 &stcb->asoc.sent_queue, SCTP_SO_NOT_LOCKED); 724 } 725 } 726 continue; 727 } 728 if (chk->sent < SCTP_DATAGRAM_RESEND) { 729 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 730 num_mk++; 731 if (fir == 0) { 732 fir = 1; 733 tsnfirst = chk->rec.data.TSN_seq; 734 } 735 tsnlast = chk->rec.data.TSN_seq; 736 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 737 sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count, 738 0, SCTP_FR_T3_MARKED); 739 } 740 if (chk->rec.data.chunk_was_revoked) { 741 /* deflate the cwnd */ 742 chk->whoTo->cwnd -= chk->book_size; 743 chk->rec.data.chunk_was_revoked = 0; 744 } 745 net->marked_retrans++; 746 stcb->asoc.marked_retrans++; 747 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 748 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, 749 chk->whoTo->flight_size, 750 chk->book_size, 751 (uintptr_t) chk->whoTo, 752 chk->rec.data.TSN_seq); 753 } 754 sctp_flight_size_decrease(chk); 755 sctp_total_flight_decrease(stcb, chk); 756 stcb->asoc.peers_rwnd += chk->send_size; 757 stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); 758 } 759 chk->sent = SCTP_DATAGRAM_RESEND; 760 SCTP_STAT_INCR(sctps_markedretrans); 761 762 /* reset the TSN for striking and other FR stuff */ 763 chk->rec.data.doing_fast_retransmit = 0; 764 /* Clear any time so NO RTT is being done */ 765 chk->do_rtt = 0; 766 if (alt != net) { 767 sctp_free_remote_addr(chk->whoTo); 768 chk->no_fr_allowed = 1; 769 chk->whoTo = alt; 770 atomic_add_int(&alt->ref_count, 1); 771 } else { 772 chk->no_fr_allowed = 0; 773 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { 774 chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; 775 } else { 776 chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq; 777 } 778 } 779 /* 780 * CMT: Do not allow FRs on retransmitted TSNs. 781 */ 782 if (SCTP_BASE_SYSCTL(sctp_cmt_on_off) == 1) { 783 chk->no_fr_allowed = 1; 784 } 785 } else if (chk->sent == SCTP_DATAGRAM_ACKED) { 786 /* remember highest acked one */ 787 could_be_sent = chk; 788 } 789 if (chk->sent == SCTP_DATAGRAM_RESEND) { 790 cnt_mk++; 791 } 792 } 793 if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { 794 /* we did not subtract the same things? */ 795 audit_tf = 1; 796 } 797 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_EARLYFR_LOGGING_ENABLE | SCTP_FR_LOGGING_ENABLE)) { 798 sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); 799 } 800#ifdef SCTP_DEBUG 801 if (num_mk) { 802 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 803 tsnlast); 804 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n", 805 num_mk, (u_long)stcb->asoc.peers_rwnd); 806 SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", 807 tsnlast); 808 SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n", 809 num_mk, 810 (int)stcb->asoc.peers_rwnd); 811 } 812#endif 813 *num_marked = num_mk; 814 if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { 815 /* fix it so we retransmit the highest acked anyway */ 816 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 817 cnt_mk++; 818 could_be_sent->sent = SCTP_DATAGRAM_RESEND; 819 } 820 if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { 821#ifdef INVARIANTS 822 SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", 823 cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); 824#endif 825#ifndef SCTP_AUDITING_ENABLED 826 stcb->asoc.sent_queue_retran_cnt = cnt_mk; 827#endif 828 } 829 /* Now check for a ECN Echo that may be stranded */ 830 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 831 if ((chk->whoTo == net) && 832 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 833 sctp_free_remote_addr(chk->whoTo); 834 chk->whoTo = alt; 835 if (chk->sent != SCTP_DATAGRAM_RESEND) { 836 chk->sent = SCTP_DATAGRAM_RESEND; 837 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 838 } 839 atomic_add_int(&alt->ref_count, 1); 840 } 841 } 842 if (audit_tf) { 843 SCTPDBG(SCTP_DEBUG_TIMER4, 844 "Audit total flight due to negative value net:%p\n", 845 net); 846 stcb->asoc.total_flight = 0; 847 stcb->asoc.total_flight_count = 0; 848 /* Clear all networks flight size */ 849 TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { 850 lnets->flight_size = 0; 851 SCTPDBG(SCTP_DEBUG_TIMER4, 852 "Net:%p c-f cwnd:%d ssthresh:%d\n", 853 lnets, lnets->cwnd, lnets->ssthresh); 854 } 855 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 856 if (chk->sent < SCTP_DATAGRAM_RESEND) { 857 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 858 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 859 chk->whoTo->flight_size, 860 chk->book_size, 861 (uintptr_t) chk->whoTo, 862 chk->rec.data.TSN_seq); 863 } 864 sctp_flight_size_increase(chk); 865 sctp_total_flight_increase(stcb, chk); 866 } 867 } 868 } 869 /* 870 * Setup the ecn nonce re-sync point. We do this since 871 * retranmissions are NOT setup for ECN. This means that do to 872 * Karn's rule, we don't know the total of the peers ecn bits. 873 */ 874 chk = TAILQ_FIRST(&stcb->asoc.send_queue); 875 if (chk == NULL) { 876 stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq; 877 } else { 878 stcb->asoc.nonce_resync_tsn = chk->rec.data.TSN_seq; 879 } 880 stcb->asoc.nonce_wait_for_ecne = 0; 881 stcb->asoc.nonce_sum_check = 0; 882 /* We return 1 if we only have a window probe outstanding */ 883 return (0); 884} 885 886static void 887sctp_move_all_chunks_to_alt(struct sctp_tcb *stcb, 888 struct sctp_nets *net, 889 struct sctp_nets *alt) 890{ 891 struct sctp_association *asoc; 892 struct sctp_stream_out *outs; 893 struct sctp_tmit_chunk *chk; 894 struct sctp_stream_queue_pending *sp; 895 896 if (net == alt) 897 /* nothing to do */ 898 return; 899 900 asoc = &stcb->asoc; 901 902 /* 903 * now through all the streams checking for chunks sent to our bad 904 * network. 905 */ 906 TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) { 907 /* now clean up any chunks here */ 908 TAILQ_FOREACH(sp, &outs->outqueue, next) { 909 if (sp->net == net) { 910 sctp_free_remote_addr(sp->net); 911 sp->net = alt; 912 atomic_add_int(&alt->ref_count, 1); 913 } 914 } 915 } 916 /* Now check the pending queue */ 917 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 918 if (chk->whoTo == net) { 919 sctp_free_remote_addr(chk->whoTo); 920 chk->whoTo = alt; 921 atomic_add_int(&alt->ref_count, 1); 922 } 923 } 924 925} 926 927int 928sctp_t3rxt_timer(struct sctp_inpcb *inp, 929 struct sctp_tcb *stcb, 930 struct sctp_nets *net) 931{ 932 struct sctp_nets *alt; 933 int win_probe, num_mk; 934 935 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { 936 sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); 937 } 938 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 939 struct sctp_nets *lnet; 940 941 TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { 942 if (net == lnet) { 943 sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); 944 } else { 945 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); 946 } 947 } 948 } 949 /* Find an alternate and mark those for retransmission */ 950 if ((stcb->asoc.peers_rwnd == 0) && 951 (stcb->asoc.total_flight < net->mtu)) { 952 SCTP_STAT_INCR(sctps_timowindowprobe); 953 win_probe = 1; 954 } else { 955 win_probe = 0; 956 } 957 958 /* 959 * JRS 5/14/07 - If CMT PF is on and the destination if not already 960 * in PF state, set the destination to PF state and store the 961 * current time as the time that the destination was last active. In 962 * addition, find an alternate destination with PF-based 963 * find_alt_net(). 964 */ 965 if (SCTP_BASE_SYSCTL(sctp_cmt_on_off) && SCTP_BASE_SYSCTL(sctp_cmt_pf)) { 966 if ((net->dest_state & SCTP_ADDR_PF) != SCTP_ADDR_PF) { 967 net->dest_state |= SCTP_ADDR_PF; 968 net->last_active = sctp_get_tick_count(); 969 SCTPDBG(SCTP_DEBUG_TIMER4, "Destination %p moved from active to PF.\n", 970 net); 971 } 972 alt = sctp_find_alternate_net(stcb, net, 2); 973 } else if (SCTP_BASE_SYSCTL(sctp_cmt_on_off)) { 974 /* 975 * CMT: Using RTX_SSTHRESH policy for CMT. If CMT is being 976 * used, then pick dest with largest ssthresh for any 977 * retransmission. 978 */ 979 alt = net; 980 alt = sctp_find_alternate_net(stcb, alt, 1); 981 /* 982 * CUCv2: If a different dest is picked for the 983 * retransmission, then new (rtx-)pseudo_cumack needs to be 984 * tracked for orig dest. Let CUCv2 track new (rtx-) 985 * pseudo-cumack always. 986 */ 987 net->find_pseudo_cumack = 1; 988 net->find_rtx_pseudo_cumack = 1; 989 } else { /* CMT is OFF */ 990 alt = sctp_find_alternate_net(stcb, net, 0); 991 } 992 993 (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, &num_mk); 994 /* FR Loss recovery just ended with the T3. */ 995 stcb->asoc.fast_retran_loss_recovery = 0; 996 997 /* CMT FR loss recovery ended with the T3 */ 998 net->fast_retran_loss_recovery = 0; 999 1000 /* 1001 * setup the sat loss recovery that prevents satellite cwnd advance. 1002 */ 1003 stcb->asoc.sat_t3_loss_recovery = 1; 1004 stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; 1005 1006 /* Backoff the timer and cwnd */ 1007 sctp_backoff_on_timeout(stcb, net, win_probe, num_mk); 1008 if (win_probe == 0) { 1009 /* We don't do normal threshold management on window probes */ 1010 if (sctp_threshold_management(inp, stcb, net, 1011 stcb->asoc.max_send_times)) { 1012 /* Association was destroyed */ 1013 return (1); 1014 } else { 1015 if (net != stcb->asoc.primary_destination) { 1016 /* send a immediate HB if our RTO is stale */ 1017 struct timeval now; 1018 unsigned int ms_goneby; 1019 1020 (void)SCTP_GETTIME_TIMEVAL(&now); 1021 if (net->last_sent_time.tv_sec) { 1022 ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000; 1023 } else { 1024 ms_goneby = 0; 1025 } 1026 if ((ms_goneby > net->RTO) || (net->RTO == 0)) { 1027 /* 1028 * no recent feed back in an RTO or 1029 * more, request a RTT update 1030 */ 1031 if (sctp_send_hb(stcb, 1, net) < 0) 1032 return 1; 1033 } 1034 } 1035 } 1036 } else { 1037 /* 1038 * For a window probe we don't penalize the net's but only 1039 * the association. This may fail it if SACKs are not coming 1040 * back. If sack's are coming with rwnd locked at 0, we will 1041 * continue to hold things waiting for rwnd to raise 1042 */ 1043 if (sctp_threshold_management(inp, stcb, NULL, 1044 stcb->asoc.max_send_times)) { 1045 /* Association was destroyed */ 1046 return (1); 1047 } 1048 } 1049 if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 1050 /* Move all pending over too */ 1051 sctp_move_all_chunks_to_alt(stcb, net, alt); 1052 1053 /* 1054 * Get the address that failed, to force a new src address 1055 * selecton and a route allocation. 1056 */ 1057 if (net->ro._s_addr) { 1058 sctp_free_ifa(net->ro._s_addr); 1059 net->ro._s_addr = NULL; 1060 } 1061 net->src_addr_selected = 0; 1062 1063 /* Force a route allocation too */ 1064 if (net->ro.ro_rt) { 1065 RTFREE(net->ro.ro_rt); 1066 net->ro.ro_rt = NULL; 1067 } 1068 /* Was it our primary? */ 1069 if ((stcb->asoc.primary_destination == net) && (alt != net)) { 1070 /* 1071 * Yes, note it as such and find an alternate note: 1072 * this means HB code must use this to resent the 1073 * primary if it goes active AND if someone does a 1074 * change-primary then this flag must be cleared 1075 * from any net structures. 1076 */ 1077 if (sctp_set_primary_addr(stcb, 1078 (struct sockaddr *)NULL, 1079 alt) == 0) { 1080 net->dest_state |= SCTP_ADDR_WAS_PRIMARY; 1081 } 1082 } 1083 } else if (SCTP_BASE_SYSCTL(sctp_cmt_on_off) && SCTP_BASE_SYSCTL(sctp_cmt_pf) && (net->dest_state & SCTP_ADDR_PF) == SCTP_ADDR_PF) { 1084 /* 1085 * JRS 5/14/07 - If the destination hasn't failed completely 1086 * but is in PF state, a PF-heartbeat needs to be sent 1087 * manually. 1088 */ 1089 if (sctp_send_hb(stcb, 1, net) < 0) 1090 return 1; 1091 } 1092 /* 1093 * Special case for cookie-echo'ed case, we don't do output but must 1094 * await the COOKIE-ACK before retransmission 1095 */ 1096 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1097 /* 1098 * Here we just reset the timer and start again since we 1099 * have not established the asoc 1100 */ 1101 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 1102 return (0); 1103 } 1104 if (stcb->asoc.peer_supports_prsctp) { 1105 struct sctp_tmit_chunk *lchk; 1106 1107 lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); 1108 /* C3. See if we need to send a Fwd-TSN */ 1109 if (compare_with_wrap(stcb->asoc.advanced_peer_ack_point, 1110 stcb->asoc.last_acked_seq, MAX_TSN)) { 1111 /* 1112 * ISSUE with ECN, see FWD-TSN processing for notes 1113 * on issues that will occur when the ECN NONCE 1114 * stuff is put into SCTP for cross checking. 1115 */ 1116 send_forward_tsn(stcb, &stcb->asoc); 1117 if (lchk) { 1118 /* Assure a timer is up */ 1119 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); 1120 } 1121 } 1122 } 1123 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { 1124 sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); 1125 } 1126 return (0); 1127} 1128 1129int 1130sctp_t1init_timer(struct sctp_inpcb *inp, 1131 struct sctp_tcb *stcb, 1132 struct sctp_nets *net) 1133{ 1134 /* bump the thresholds */ 1135 if (stcb->asoc.delayed_connection) { 1136 /* 1137 * special hook for delayed connection. The library did NOT 1138 * complete the rest of its sends. 1139 */ 1140 stcb->asoc.delayed_connection = 0; 1141 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1142 return (0); 1143 } 1144 if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) { 1145 return (0); 1146 } 1147 if (sctp_threshold_management(inp, stcb, net, 1148 stcb->asoc.max_init_times)) { 1149 /* Association was destroyed */ 1150 return (1); 1151 } 1152 stcb->asoc.dropped_special_cnt = 0; 1153 sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0); 1154 if (stcb->asoc.initial_init_rto_max < net->RTO) { 1155 net->RTO = stcb->asoc.initial_init_rto_max; 1156 } 1157 if (stcb->asoc.numnets > 1) { 1158 /* If we have more than one addr use it */ 1159 struct sctp_nets *alt; 1160 1161 alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); 1162 if ((alt != NULL) && (alt != stcb->asoc.primary_destination)) { 1163 sctp_move_all_chunks_to_alt(stcb, stcb->asoc.primary_destination, alt); 1164 stcb->asoc.primary_destination = alt; 1165 } 1166 } 1167 /* Send out a new init */ 1168 sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); 1169 return (0); 1170} 1171 1172/* 1173 * For cookie and asconf we actually need to find and mark for resend, then 1174 * increment the resend counter (after all the threshold management stuff of 1175 * course). 1176 */ 1177int 1178sctp_cookie_timer(struct sctp_inpcb *inp, 1179 struct sctp_tcb *stcb, 1180 struct sctp_nets *net) 1181{ 1182 struct sctp_nets *alt; 1183 struct sctp_tmit_chunk *cookie; 1184 1185 /* first before all else we must find the cookie */ 1186 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { 1187 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 1188 break; 1189 } 1190 } 1191 if (cookie == NULL) { 1192 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) { 1193 /* FOOBAR! */ 1194 struct mbuf *oper; 1195 1196 oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 1197 0, M_DONTWAIT, 1, MT_DATA); 1198 if (oper) { 1199 struct sctp_paramhdr *ph; 1200 uint32_t *ippp; 1201 1202 SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) + 1203 sizeof(uint32_t); 1204 ph = mtod(oper, struct sctp_paramhdr *); 1205 ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 1206 ph->param_length = htons(SCTP_BUF_LEN(oper)); 1207 ippp = (uint32_t *) (ph + 1); 1208 *ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_3); 1209 } 1210 inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_4; 1211 sctp_abort_an_association(inp, stcb, SCTP_INTERNAL_ERROR, 1212 oper, SCTP_SO_NOT_LOCKED); 1213 } else { 1214#ifdef INVARIANTS 1215 panic("Cookie timer expires in wrong state?"); 1216#else 1217 SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc)); 1218 return (0); 1219#endif 1220 } 1221 return (0); 1222 } 1223 /* Ok we found the cookie, threshold management next */ 1224 if (sctp_threshold_management(inp, stcb, cookie->whoTo, 1225 stcb->asoc.max_init_times)) { 1226 /* Assoc is over */ 1227 return (1); 1228 } 1229 /* 1230 * cleared theshold management now lets backoff the address & select 1231 * an alternate 1232 */ 1233 stcb->asoc.dropped_special_cnt = 0; 1234 sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0); 1235 alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); 1236 if (alt != cookie->whoTo) { 1237 sctp_free_remote_addr(cookie->whoTo); 1238 cookie->whoTo = alt; 1239 atomic_add_int(&alt->ref_count, 1); 1240 } 1241 /* Now mark the retran info */ 1242 if (cookie->sent != SCTP_DATAGRAM_RESEND) { 1243 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1244 } 1245 cookie->sent = SCTP_DATAGRAM_RESEND; 1246 /* 1247 * Now call the output routine to kick out the cookie again, Note we 1248 * don't mark any chunks for retran so that FR will need to kick in 1249 * to move these (or a send timer). 1250 */ 1251 return (0); 1252} 1253 1254int 1255sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1256 struct sctp_nets *net) 1257{ 1258 struct sctp_nets *alt; 1259 struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; 1260 1261 if (stcb->asoc.stream_reset_outstanding == 0) { 1262 return (0); 1263 } 1264 /* find the existing STRRESET, we use the seq number we sent out on */ 1265 (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); 1266 if (strrst == NULL) { 1267 return (0); 1268 } 1269 /* do threshold management */ 1270 if (sctp_threshold_management(inp, stcb, strrst->whoTo, 1271 stcb->asoc.max_send_times)) { 1272 /* Assoc is over */ 1273 return (1); 1274 } 1275 /* 1276 * cleared theshold management now lets backoff the address & select 1277 * an alternate 1278 */ 1279 sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0); 1280 alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0); 1281 sctp_free_remote_addr(strrst->whoTo); 1282 strrst->whoTo = alt; 1283 atomic_add_int(&alt->ref_count, 1); 1284 1285 /* See if a ECN Echo is also stranded */ 1286 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1287 if ((chk->whoTo == net) && 1288 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1289 sctp_free_remote_addr(chk->whoTo); 1290 if (chk->sent != SCTP_DATAGRAM_RESEND) { 1291 chk->sent = SCTP_DATAGRAM_RESEND; 1292 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1293 } 1294 chk->whoTo = alt; 1295 atomic_add_int(&alt->ref_count, 1); 1296 } 1297 } 1298 if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 1299 /* 1300 * If the address went un-reachable, we need to move to 1301 * alternates for ALL chk's in queue 1302 */ 1303 sctp_move_all_chunks_to_alt(stcb, net, alt); 1304 } 1305 /* mark the retran info */ 1306 if (strrst->sent != SCTP_DATAGRAM_RESEND) 1307 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1308 strrst->sent = SCTP_DATAGRAM_RESEND; 1309 1310 /* restart the timer */ 1311 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo); 1312 return (0); 1313} 1314 1315int 1316sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1317 struct sctp_nets *net) 1318{ 1319 struct sctp_nets *alt; 1320 struct sctp_tmit_chunk *asconf, *chk, *nchk; 1321 1322 /* is this a first send, or a retransmission? */ 1323 if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { 1324 /* compose a new ASCONF chunk and send it */ 1325 sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); 1326 } else { 1327 /* 1328 * Retransmission of the existing ASCONF is needed 1329 */ 1330 1331 /* find the existing ASCONF */ 1332 asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); 1333 if (asconf == NULL) { 1334 return (0); 1335 } 1336 /* do threshold management */ 1337 if (sctp_threshold_management(inp, stcb, asconf->whoTo, 1338 stcb->asoc.max_send_times)) { 1339 /* Assoc is over */ 1340 return (1); 1341 } 1342 if (asconf->snd_count > stcb->asoc.max_send_times) { 1343 /* 1344 * Something is rotten: our peer is not responding 1345 * to ASCONFs but apparently is to other chunks. 1346 * i.e. it is not properly handling the chunk type 1347 * upper bits. Mark this peer as ASCONF incapable 1348 * and cleanup. 1349 */ 1350 SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); 1351 sctp_asconf_cleanup(stcb, net); 1352 return (0); 1353 } 1354 /* 1355 * cleared threshold management, so now backoff the net and 1356 * select an alternate 1357 */ 1358 sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0); 1359 alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0); 1360 if (asconf->whoTo != alt) { 1361 sctp_free_remote_addr(asconf->whoTo); 1362 asconf->whoTo = alt; 1363 atomic_add_int(&alt->ref_count, 1); 1364 } 1365 /* See if an ECN Echo is also stranded */ 1366 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { 1367 if ((chk->whoTo == net) && 1368 (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { 1369 sctp_free_remote_addr(chk->whoTo); 1370 chk->whoTo = alt; 1371 if (chk->sent != SCTP_DATAGRAM_RESEND) { 1372 chk->sent = SCTP_DATAGRAM_RESEND; 1373 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1374 } 1375 atomic_add_int(&alt->ref_count, 1); 1376 } 1377 } 1378 for (chk = asconf; chk; chk = nchk) { 1379 nchk = TAILQ_NEXT(chk, sctp_next); 1380 if (chk->whoTo != alt) { 1381 sctp_free_remote_addr(chk->whoTo); 1382 chk->whoTo = alt; 1383 atomic_add_int(&alt->ref_count, 1); 1384 } 1385 if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) 1386 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1387 chk->sent = SCTP_DATAGRAM_RESEND; 1388 } 1389 if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) { 1390 /* 1391 * If the address went un-reachable, we need to move 1392 * to the alternate for ALL chunks in queue 1393 */ 1394 sctp_move_all_chunks_to_alt(stcb, net, alt); 1395 net = alt; 1396 } 1397 /* mark the retran info */ 1398 if (asconf->sent != SCTP_DATAGRAM_RESEND) 1399 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); 1400 asconf->sent = SCTP_DATAGRAM_RESEND; 1401 1402 /* send another ASCONF if any and we can do */ 1403 sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); 1404 } 1405 return (0); 1406} 1407 1408/* Mobility adaptation */ 1409void 1410sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1411 struct sctp_nets *net) 1412{ 1413 if (stcb->asoc.deleted_primary == NULL) { 1414 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); 1415 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1416 return; 1417 } 1418 SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); 1419 SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); 1420 sctp_free_remote_addr(stcb->asoc.deleted_primary); 1421 stcb->asoc.deleted_primary = NULL; 1422 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 1423 return; 1424} 1425 1426/* 1427 * For the shutdown and shutdown-ack, we do not keep one around on the 1428 * control queue. This means we must generate a new one and call the general 1429 * chunk output routine, AFTER having done threshold management. 1430 */ 1431int 1432sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1433 struct sctp_nets *net) 1434{ 1435 struct sctp_nets *alt; 1436 1437 /* first threshold managment */ 1438 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1439 /* Assoc is over */ 1440 return (1); 1441 } 1442 /* second select an alternative */ 1443 alt = sctp_find_alternate_net(stcb, net, 0); 1444 1445 /* third generate a shutdown into the queue for out net */ 1446 if (alt) { 1447 sctp_send_shutdown(stcb, alt); 1448 } else { 1449 /* 1450 * if alt is NULL, there is no dest to send to?? 1451 */ 1452 return (0); 1453 } 1454 /* fourth restart timer */ 1455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); 1456 return (0); 1457} 1458 1459int 1460sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1461 struct sctp_nets *net) 1462{ 1463 struct sctp_nets *alt; 1464 1465 /* first threshold managment */ 1466 if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { 1467 /* Assoc is over */ 1468 return (1); 1469 } 1470 /* second select an alternative */ 1471 alt = sctp_find_alternate_net(stcb, net, 0); 1472 1473 /* third generate a shutdown into the queue for out net */ 1474 sctp_send_shutdown_ack(stcb, alt); 1475 1476 /* fourth restart timer */ 1477 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); 1478 return (0); 1479} 1480 1481static void 1482sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, 1483 struct sctp_tcb *stcb) 1484{ 1485 struct sctp_stream_out *outs; 1486 struct sctp_stream_queue_pending *sp; 1487 unsigned int chks_in_queue = 0; 1488 int being_filled = 0; 1489 1490 /* 1491 * This function is ONLY called when the send/sent queues are empty. 1492 */ 1493 if ((stcb == NULL) || (inp == NULL)) 1494 return; 1495 1496 if (stcb->asoc.sent_queue_retran_cnt) { 1497 SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", 1498 stcb->asoc.sent_queue_retran_cnt); 1499 stcb->asoc.sent_queue_retran_cnt = 0; 1500 } 1501 SCTP_TCB_SEND_LOCK(stcb); 1502 if (TAILQ_EMPTY(&stcb->asoc.out_wheel)) { 1503 int i, cnt = 0; 1504 1505 /* Check to see if a spoke fell off the wheel */ 1506 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 1507 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 1508 sctp_insert_on_wheel(stcb, &stcb->asoc, &stcb->asoc.strmout[i], 1); 1509 cnt++; 1510 } 1511 } 1512 if (cnt) { 1513 /* yep, we lost a spoke or two */ 1514 SCTP_PRINTF("Found an additional %d streams NOT on outwheel, corrected\n", cnt); 1515 } else { 1516 /* no spokes lost, */ 1517 stcb->asoc.total_output_queue_size = 0; 1518 } 1519 SCTP_TCB_SEND_UNLOCK(stcb); 1520 return; 1521 } 1522 SCTP_TCB_SEND_UNLOCK(stcb); 1523 /* Check to see if some data queued, if so report it */ 1524 TAILQ_FOREACH(outs, &stcb->asoc.out_wheel, next_spoke) { 1525 if (!TAILQ_EMPTY(&outs->outqueue)) { 1526 TAILQ_FOREACH(sp, &outs->outqueue, next) { 1527 if (sp->msg_is_complete) 1528 being_filled++; 1529 chks_in_queue++; 1530 } 1531 } 1532 } 1533 if (chks_in_queue != stcb->asoc.stream_queue_cnt) { 1534 SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", 1535 stcb->asoc.stream_queue_cnt, chks_in_queue); 1536 } 1537 if (chks_in_queue) { 1538 /* call the output queue function */ 1539 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); 1540 if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1541 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1542 /* 1543 * Probably should go in and make it go back through 1544 * and add fragments allowed 1545 */ 1546 if (being_filled == 0) { 1547 SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", 1548 chks_in_queue); 1549 } 1550 } 1551 } else { 1552 SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", 1553 (u_long)stcb->asoc.total_output_queue_size); 1554 stcb->asoc.total_output_queue_size = 0; 1555 } 1556} 1557 1558int 1559sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 1560 struct sctp_nets *net, int cnt_of_unconf) 1561{ 1562 int ret; 1563 1564 if (net) { 1565 if (net->hb_responded == 0) { 1566 if (net->ro._s_addr) { 1567 /* 1568 * Invalidate the src address if we did not 1569 * get a response last time. 1570 */ 1571 sctp_free_ifa(net->ro._s_addr); 1572 net->ro._s_addr = NULL; 1573 net->src_addr_selected = 0; 1574 } 1575 sctp_backoff_on_timeout(stcb, net, 1, 0); 1576 } 1577 /* Zero PBA, if it needs it */ 1578 if (net->partial_bytes_acked) { 1579 net->partial_bytes_acked = 0; 1580 } 1581 } 1582 if ((stcb->asoc.total_output_queue_size > 0) && 1583 (TAILQ_EMPTY(&stcb->asoc.send_queue)) && 1584 (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { 1585 sctp_audit_stream_queues_for_size(inp, stcb); 1586 } 1587 /* Send a new HB, this will do threshold managment, pick a new dest */ 1588 if (cnt_of_unconf == 0) { 1589 if (sctp_send_hb(stcb, 0, NULL) < 0) { 1590 return (1); 1591 } 1592 } else { 1593 /* 1594 * this will send out extra hb's up to maxburst if there are 1595 * any unconfirmed addresses. 1596 */ 1597 uint32_t cnt_sent = 0; 1598 1599 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1600 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) && 1601 (net->dest_state & SCTP_ADDR_REACHABLE)) { 1602 cnt_sent++; 1603 if (net->hb_responded == 0) { 1604 /* Did we respond last time? */ 1605 if (net->ro._s_addr) { 1606 sctp_free_ifa(net->ro._s_addr); 1607 net->ro._s_addr = NULL; 1608 net->src_addr_selected = 0; 1609 } 1610 } 1611 ret = sctp_send_hb(stcb, 1, net); 1612 if (ret < 0) 1613 return 1; 1614 else if (ret == 0) { 1615 break; 1616 } 1617 if (cnt_sent >= SCTP_BASE_SYSCTL(sctp_hb_maxburst)) 1618 break; 1619 } 1620 } 1621 } 1622 return (0); 1623} 1624 1625int 1626sctp_is_hb_timer_running(struct sctp_tcb *stcb) 1627{ 1628 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.hb_timer.timer)) { 1629 /* its running */ 1630 return (1); 1631 } else { 1632 /* nope */ 1633 return (0); 1634 } 1635} 1636 1637int 1638sctp_is_sack_timer_running(struct sctp_tcb *stcb) 1639{ 1640 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 1641 /* its running */ 1642 return (1); 1643 } else { 1644 /* nope */ 1645 return (0); 1646 } 1647} 1648 1649#define SCTP_NUMBER_OF_MTU_SIZES 18 1650static uint32_t mtu_sizes[] = { 1651 68, 1652 296, 1653 508, 1654 512, 1655 544, 1656 576, 1657 1006, 1658 1492, 1659 1500, 1660 1536, 1661 2002, 1662 2048, 1663 4352, 1664 4464, 1665 8166, 1666 17914, 1667 32000, 1668 65535 1669}; 1670 1671 1672static uint32_t 1673sctp_getnext_mtu(struct sctp_inpcb *inp, uint32_t cur_mtu) 1674{ 1675 /* select another MTU that is just bigger than this one */ 1676 int i; 1677 1678 for (i = 0; i < SCTP_NUMBER_OF_MTU_SIZES; i++) { 1679 if (cur_mtu < mtu_sizes[i]) { 1680 /* no max_mtu is bigger than this one */ 1681 return (mtu_sizes[i]); 1682 } 1683 } 1684 /* here return the highest allowable */ 1685 return (cur_mtu); 1686} 1687 1688 1689void 1690sctp_pathmtu_timer(struct sctp_inpcb *inp, 1691 struct sctp_tcb *stcb, 1692 struct sctp_nets *net) 1693{ 1694 uint32_t next_mtu, mtu; 1695 1696 next_mtu = sctp_getnext_mtu(inp, net->mtu); 1697 1698 if ((next_mtu > net->mtu) && (net->port == 0)) { 1699 if ((net->src_addr_selected == 0) || 1700 (net->ro._s_addr == NULL) || 1701 (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1702 if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { 1703 sctp_free_ifa(net->ro._s_addr); 1704 net->ro._s_addr = NULL; 1705 net->src_addr_selected = 0; 1706 } else if (net->ro._s_addr == NULL) { 1707#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) 1708 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 1709 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1710 1711 /* KAME hack: embed scopeid */
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