1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/netwerk/sctp/src/netinet/sctp_timer.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,1623 @@
1.4 +/*-
1.5 + * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
1.6 + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
1.7 + * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions are met:
1.11 + *
1.12 + * a) Redistributions of source code must retain the above copyright notice,
1.13 + * this list of conditions and the following disclaimer.
1.14 + *
1.15 + * b) Redistributions in binary form must reproduce the above copyright
1.16 + * notice, this list of conditions and the following disclaimer in
1.17 + * the documentation and/or other materials provided with the distribution.
1.18 + *
1.19 + * c) Neither the name of Cisco Systems, Inc. nor the names of its
1.20 + * contributors may be used to endorse or promote products derived
1.21 + * from this software without specific prior written permission.
1.22 + *
1.23 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.24 + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.25 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.26 + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
1.27 + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.28 + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.29 + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.30 + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.31 + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.32 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
1.33 + * THE POSSIBILITY OF SUCH DAMAGE.
1.34 + */
1.35 +
1.36 +#ifdef __FreeBSD__
1.37 +#include <sys/cdefs.h>
1.38 +__FBSDID("$FreeBSD: head/sys/netinet/sctp_timer.c 257359 2013-10-29 20:04:50Z tuexen $");
1.39 +#endif
1.40 +
1.41 +#define _IP_VHL
1.42 +#include <netinet/sctp_os.h>
1.43 +#include <netinet/sctp_pcb.h>
1.44 +#ifdef INET6
1.45 +#if defined(__Userspace_os_FreeBSD)
1.46 +#include <netinet6/sctp6_var.h>
1.47 +#endif
1.48 +#endif
1.49 +#include <netinet/sctp_var.h>
1.50 +#include <netinet/sctp_sysctl.h>
1.51 +#include <netinet/sctp_timer.h>
1.52 +#include <netinet/sctputil.h>
1.53 +#include <netinet/sctp_output.h>
1.54 +#include <netinet/sctp_header.h>
1.55 +#include <netinet/sctp_indata.h>
1.56 +#include <netinet/sctp_asconf.h>
1.57 +#include <netinet/sctp_input.h>
1.58 +#include <netinet/sctp.h>
1.59 +#include <netinet/sctp_uio.h>
1.60 +#if !defined(__Userspace_os_Windows)
1.61 +#include <netinet/udp.h>
1.62 +#endif
1.63 +
1.64 +#if defined(__APPLE__)
1.65 +#define APPLE_FILE_NO 6
1.66 +#endif
1.67 +
1.68 +void
1.69 +sctp_audit_retranmission_queue(struct sctp_association *asoc)
1.70 +{
1.71 + struct sctp_tmit_chunk *chk;
1.72 +
1.73 + SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n",
1.74 + asoc->sent_queue_retran_cnt,
1.75 + asoc->sent_queue_cnt);
1.76 + asoc->sent_queue_retran_cnt = 0;
1.77 + asoc->sent_queue_cnt = 0;
1.78 + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
1.79 + if (chk->sent == SCTP_DATAGRAM_RESEND) {
1.80 + sctp_ucount_incr(asoc->sent_queue_retran_cnt);
1.81 + }
1.82 + asoc->sent_queue_cnt++;
1.83 + }
1.84 + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
1.85 + if (chk->sent == SCTP_DATAGRAM_RESEND) {
1.86 + sctp_ucount_incr(asoc->sent_queue_retran_cnt);
1.87 + }
1.88 + }
1.89 + TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) {
1.90 + if (chk->sent == SCTP_DATAGRAM_RESEND) {
1.91 + sctp_ucount_incr(asoc->sent_queue_retran_cnt);
1.92 + }
1.93 + }
1.94 + SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n",
1.95 + asoc->sent_queue_retran_cnt,
1.96 + asoc->sent_queue_cnt);
1.97 +}
1.98 +
1.99 +int
1.100 +sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.101 + struct sctp_nets *net, uint16_t threshold)
1.102 +{
1.103 + if (net) {
1.104 + net->error_count++;
1.105 + SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n",
1.106 + (void *)net, net->error_count,
1.107 + net->failure_threshold);
1.108 + if (net->error_count > net->failure_threshold) {
1.109 + /* We had a threshold failure */
1.110 + if (net->dest_state & SCTP_ADDR_REACHABLE) {
1.111 + net->dest_state &= ~SCTP_ADDR_REACHABLE;
1.112 + net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
1.113 + net->dest_state &= ~SCTP_ADDR_PF;
1.114 + sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
1.115 + stcb, 0,
1.116 + (void *)net, SCTP_SO_NOT_LOCKED);
1.117 + }
1.118 + } else if ((net->pf_threshold < net->failure_threshold) &&
1.119 + (net->error_count > net->pf_threshold)) {
1.120 + if (!(net->dest_state & SCTP_ADDR_PF)) {
1.121 + net->dest_state |= SCTP_ADDR_PF;
1.122 + net->last_active = sctp_get_tick_count();
1.123 + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1.124 + sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_TIMER + SCTP_LOC_3);
1.125 + sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
1.126 + }
1.127 + }
1.128 + }
1.129 + if (stcb == NULL)
1.130 + return (0);
1.131 +
1.132 + if (net) {
1.133 + if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) {
1.134 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1.135 + sctp_misc_ints(SCTP_THRESHOLD_INCR,
1.136 + stcb->asoc.overall_error_count,
1.137 + (stcb->asoc.overall_error_count+1),
1.138 + SCTP_FROM_SCTP_TIMER,
1.139 + __LINE__);
1.140 + }
1.141 + stcb->asoc.overall_error_count++;
1.142 + }
1.143 + } else {
1.144 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1.145 + sctp_misc_ints(SCTP_THRESHOLD_INCR,
1.146 + stcb->asoc.overall_error_count,
1.147 + (stcb->asoc.overall_error_count+1),
1.148 + SCTP_FROM_SCTP_TIMER,
1.149 + __LINE__);
1.150 + }
1.151 + stcb->asoc.overall_error_count++;
1.152 + }
1.153 + SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n",
1.154 + (void *)&stcb->asoc, stcb->asoc.overall_error_count,
1.155 + (uint32_t)threshold,
1.156 + ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state));
1.157 + /*
1.158 + * We specifically do not do >= to give the assoc one more change
1.159 + * before we fail it.
1.160 + */
1.161 + if (stcb->asoc.overall_error_count > threshold) {
1.162 + /* Abort notification sends a ULP notify */
1.163 + struct mbuf *oper;
1.164 +
1.165 + oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
1.166 + 0, M_NOWAIT, 1, MT_DATA);
1.167 + if (oper) {
1.168 + struct sctp_paramhdr *ph;
1.169 + uint32_t *ippp;
1.170 +
1.171 + SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) +
1.172 + sizeof(uint32_t);
1.173 + ph = mtod(oper, struct sctp_paramhdr *);
1.174 + ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
1.175 + ph->param_length = htons(SCTP_BUF_LEN(oper));
1.176 + ippp = (uint32_t *) (ph + 1);
1.177 + *ippp = htonl(SCTP_FROM_SCTP_TIMER+SCTP_LOC_1);
1.178 + }
1.179 + inp->last_abort_code = SCTP_FROM_SCTP_TIMER+SCTP_LOC_1;
1.180 + sctp_abort_an_association(inp, stcb, oper, SCTP_SO_NOT_LOCKED);
1.181 + return (1);
1.182 + }
1.183 + return (0);
1.184 +}
1.185 +
1.186 +/*
1.187 + * sctp_find_alternate_net() returns a non-NULL pointer as long
1.188 + * the argument net is non-NULL.
1.189 + */
1.190 +struct sctp_nets *
1.191 +sctp_find_alternate_net(struct sctp_tcb *stcb,
1.192 + struct sctp_nets *net,
1.193 + int mode)
1.194 +{
1.195 + /* Find and return an alternate network if possible */
1.196 + struct sctp_nets *alt, *mnet, *min_errors_net = NULL , *max_cwnd_net = NULL;
1.197 + int once;
1.198 + /* JRS 5/14/07 - Initialize min_errors to an impossible value. */
1.199 + int min_errors = -1;
1.200 + uint32_t max_cwnd = 0;
1.201 +
1.202 + if (stcb->asoc.numnets == 1) {
1.203 + /* No others but net */
1.204 + return (TAILQ_FIRST(&stcb->asoc.nets));
1.205 + }
1.206 + /*
1.207 + * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate net algorithm.
1.208 + * This algorithm chooses the active destination (not in PF state) with the largest
1.209 + * cwnd value. If all destinations are in PF state, unreachable, or unconfirmed, choose
1.210 + * the desination that is in PF state with the lowest error count. In case of a tie,
1.211 + * choose the destination that was most recently active.
1.212 + */
1.213 + if (mode == 2) {
1.214 + TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
1.215 + /* JRS 5/14/07 - If the destination is unreachable or unconfirmed, skip it. */
1.216 + if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
1.217 + (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
1.218 + continue;
1.219 + }
1.220 + /*
1.221 + * JRS 5/14/07 - If the destination is reachable but in PF state, compare
1.222 + * the error count of the destination to the minimum error count seen thus far.
1.223 + * Store the destination with the lower error count. If the error counts are
1.224 + * equal, store the destination that was most recently active.
1.225 + */
1.226 + if (mnet->dest_state & SCTP_ADDR_PF) {
1.227 + /*
1.228 + * JRS 5/14/07 - If the destination under consideration is the current
1.229 + * destination, work as if the error count is one higher. The
1.230 + * actual error count will not be incremented until later in the
1.231 + * t3 handler.
1.232 + */
1.233 + if (mnet == net) {
1.234 + if (min_errors == -1) {
1.235 + min_errors = mnet->error_count + 1;
1.236 + min_errors_net = mnet;
1.237 + } else if (mnet->error_count + 1 < min_errors) {
1.238 + min_errors = mnet->error_count + 1;
1.239 + min_errors_net = mnet;
1.240 + } else if (mnet->error_count + 1 == min_errors
1.241 + && mnet->last_active > min_errors_net->last_active) {
1.242 + min_errors_net = mnet;
1.243 + min_errors = mnet->error_count + 1;
1.244 + }
1.245 + continue;
1.246 + } else {
1.247 + if (min_errors == -1) {
1.248 + min_errors = mnet->error_count;
1.249 + min_errors_net = mnet;
1.250 + } else if (mnet->error_count < min_errors) {
1.251 + min_errors = mnet->error_count;
1.252 + min_errors_net = mnet;
1.253 + } else if (mnet->error_count == min_errors
1.254 + && mnet->last_active > min_errors_net->last_active) {
1.255 + min_errors_net = mnet;
1.256 + min_errors = mnet->error_count;
1.257 + }
1.258 + continue;
1.259 + }
1.260 + }
1.261 + /*
1.262 + * JRS 5/14/07 - If the destination is reachable and not in PF state, compare the
1.263 + * cwnd of the destination to the highest cwnd seen thus far. Store the
1.264 + * destination with the higher cwnd value. If the cwnd values are equal,
1.265 + * randomly choose one of the two destinations.
1.266 + */
1.267 + if (max_cwnd < mnet->cwnd) {
1.268 + max_cwnd_net = mnet;
1.269 + max_cwnd = mnet->cwnd;
1.270 + } else if (max_cwnd == mnet->cwnd) {
1.271 + uint32_t rndval;
1.272 + uint8_t this_random;
1.273 +
1.274 + if (stcb->asoc.hb_random_idx > 3) {
1.275 + rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
1.276 + memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values));
1.277 + this_random = stcb->asoc.hb_random_values[0];
1.278 + stcb->asoc.hb_random_idx++;
1.279 + stcb->asoc.hb_ect_randombit = 0;
1.280 + } else {
1.281 + this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
1.282 + stcb->asoc.hb_random_idx++;
1.283 + stcb->asoc.hb_ect_randombit = 0;
1.284 + }
1.285 + if (this_random % 2 == 1) {
1.286 + max_cwnd_net = mnet;
1.287 + max_cwnd = mnet->cwnd; /* Useless? */
1.288 + }
1.289 + }
1.290 + }
1.291 + if (max_cwnd_net == NULL) {
1.292 + if (min_errors_net == NULL) {
1.293 + return (net);
1.294 + }
1.295 + return (min_errors_net);
1.296 + } else {
1.297 + return (max_cwnd_net);
1.298 + }
1.299 + } /* JRS 5/14/07 - If mode is set to 1, use the CMT policy for choosing an alternate net. */
1.300 + else if (mode == 1) {
1.301 + TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
1.302 + if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
1.303 + (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) {
1.304 + /*
1.305 + * will skip ones that are not-reachable or
1.306 + * unconfirmed
1.307 + */
1.308 + continue;
1.309 + }
1.310 + if (max_cwnd < mnet->cwnd) {
1.311 + max_cwnd_net = mnet;
1.312 + max_cwnd = mnet->cwnd;
1.313 + } else if (max_cwnd == mnet->cwnd) {
1.314 + uint32_t rndval;
1.315 + uint8_t this_random;
1.316 +
1.317 + if (stcb->asoc.hb_random_idx > 3) {
1.318 + rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
1.319 + memcpy(stcb->asoc.hb_random_values, &rndval,
1.320 + sizeof(stcb->asoc.hb_random_values));
1.321 + this_random = stcb->asoc.hb_random_values[0];
1.322 + stcb->asoc.hb_random_idx = 0;
1.323 + stcb->asoc.hb_ect_randombit = 0;
1.324 + } else {
1.325 + this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
1.326 + stcb->asoc.hb_random_idx++;
1.327 + stcb->asoc.hb_ect_randombit = 0;
1.328 + }
1.329 + if (this_random % 2) {
1.330 + max_cwnd_net = mnet;
1.331 + max_cwnd = mnet->cwnd;
1.332 + }
1.333 + }
1.334 + }
1.335 + if (max_cwnd_net) {
1.336 + return (max_cwnd_net);
1.337 + }
1.338 + }
1.339 + mnet = net;
1.340 + once = 0;
1.341 +
1.342 + if (mnet == NULL) {
1.343 + mnet = TAILQ_FIRST(&stcb->asoc.nets);
1.344 + if (mnet == NULL) {
1.345 + return (NULL);
1.346 + }
1.347 + }
1.348 + do {
1.349 + alt = TAILQ_NEXT(mnet, sctp_next);
1.350 + if (alt == NULL)
1.351 + {
1.352 + once++;
1.353 + if (once > 1) {
1.354 + break;
1.355 + }
1.356 + alt = TAILQ_FIRST(&stcb->asoc.nets);
1.357 + if (alt == NULL) {
1.358 + return (NULL);
1.359 + }
1.360 + }
1.361 + if (alt->ro.ro_rt == NULL) {
1.362 + if (alt->ro._s_addr) {
1.363 + sctp_free_ifa(alt->ro._s_addr);
1.364 + alt->ro._s_addr = NULL;
1.365 + }
1.366 + alt->src_addr_selected = 0;
1.367 + }
1.368 + /*sa_ignore NO_NULL_CHK*/
1.369 + if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
1.370 + (alt->ro.ro_rt != NULL) &&
1.371 + (!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))) {
1.372 + /* Found a reachable address */
1.373 + break;
1.374 + }
1.375 + mnet = alt;
1.376 + } while (alt != NULL);
1.377 +
1.378 + if (alt == NULL) {
1.379 + /* Case where NO insv network exists (dormant state) */
1.380 + /* we rotate destinations */
1.381 + once = 0;
1.382 + mnet = net;
1.383 + do {
1.384 + if (mnet == NULL) {
1.385 + return (TAILQ_FIRST(&stcb->asoc.nets));
1.386 + }
1.387 + alt = TAILQ_NEXT(mnet, sctp_next);
1.388 + if (alt == NULL) {
1.389 + once++;
1.390 + if (once > 1) {
1.391 + break;
1.392 + }
1.393 + alt = TAILQ_FIRST(&stcb->asoc.nets);
1.394 + }
1.395 + /*sa_ignore NO_NULL_CHK*/
1.396 + if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
1.397 + (alt != net)) {
1.398 + /* Found an alternate address */
1.399 + break;
1.400 + }
1.401 + mnet = alt;
1.402 + } while (alt != NULL);
1.403 + }
1.404 + if (alt == NULL) {
1.405 + return (net);
1.406 + }
1.407 + return (alt);
1.408 +}
1.409 +
1.410 +static void
1.411 +sctp_backoff_on_timeout(struct sctp_tcb *stcb,
1.412 + struct sctp_nets *net,
1.413 + int win_probe,
1.414 + int num_marked, int num_abandoned)
1.415 +{
1.416 + if (net->RTO == 0) {
1.417 + net->RTO = stcb->asoc.minrto;
1.418 + }
1.419 + net->RTO <<= 1;
1.420 + if (net->RTO > stcb->asoc.maxrto) {
1.421 + net->RTO = stcb->asoc.maxrto;
1.422 + }
1.423 + if ((win_probe == 0) && (num_marked || num_abandoned)) {
1.424 + /* We don't apply penalty to window probe scenarios */
1.425 + /* JRS - Use the congestion control given in the CC module */
1.426 + stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net);
1.427 + }
1.428 +}
1.429 +
1.430 +#ifndef INVARIANTS
1.431 +static void
1.432 +sctp_recover_sent_list(struct sctp_tcb *stcb)
1.433 +{
1.434 + struct sctp_tmit_chunk *chk, *nchk;
1.435 + struct sctp_association *asoc;
1.436 +
1.437 + asoc = &stcb->asoc;
1.438 + TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
1.439 + if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.TSN_seq)) {
1.440 + SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n",
1.441 + (void *)chk, chk->rec.data.TSN_seq, asoc->last_acked_seq);
1.442 + if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
1.443 + if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
1.444 + asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
1.445 + }
1.446 + }
1.447 + TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
1.448 + if (PR_SCTP_ENABLED(chk->flags)) {
1.449 + if (asoc->pr_sctp_cnt != 0)
1.450 + asoc->pr_sctp_cnt--;
1.451 + }
1.452 + if (chk->data) {
1.453 + /*sa_ignore NO_NULL_CHK*/
1.454 + sctp_free_bufspace(stcb, asoc, chk, 1);
1.455 + sctp_m_freem(chk->data);
1.456 + chk->data = NULL;
1.457 + if (asoc->peer_supports_prsctp && PR_SCTP_BUF_ENABLED(chk->flags)) {
1.458 + asoc->sent_queue_cnt_removeable--;
1.459 + }
1.460 + }
1.461 + asoc->sent_queue_cnt--;
1.462 + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
1.463 + }
1.464 + }
1.465 + SCTP_PRINTF("after recover order is as follows\n");
1.466 + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
1.467 + SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.TSN_seq);
1.468 + }
1.469 +}
1.470 +#endif
1.471 +
1.472 +static int
1.473 +sctp_mark_all_for_resend(struct sctp_tcb *stcb,
1.474 + struct sctp_nets *net,
1.475 + struct sctp_nets *alt,
1.476 + int window_probe,
1.477 + int *num_marked,
1.478 + int *num_abandoned)
1.479 +{
1.480 +
1.481 + /*
1.482 + * Mark all chunks (well not all) that were sent to *net for
1.483 + * retransmission. Move them to alt for there destination as well...
1.484 + * We only mark chunks that have been outstanding long enough to
1.485 + * have received feed-back.
1.486 + */
1.487 + struct sctp_tmit_chunk *chk, *nchk;
1.488 + struct sctp_nets *lnets;
1.489 + struct timeval now, min_wait, tv;
1.490 + int cur_rto;
1.491 + int cnt_abandoned;
1.492 + int audit_tf, num_mk, fir;
1.493 + unsigned int cnt_mk;
1.494 + uint32_t orig_flight, orig_tf;
1.495 + uint32_t tsnlast, tsnfirst;
1.496 + int recovery_cnt = 0;
1.497 +
1.498 +
1.499 + /* none in flight now */
1.500 + audit_tf = 0;
1.501 + fir = 0;
1.502 + /*
1.503 + * figure out how long a data chunk must be pending before we can
1.504 + * mark it ..
1.505 + */
1.506 + (void)SCTP_GETTIME_TIMEVAL(&now);
1.507 + /* get cur rto in micro-seconds */
1.508 + cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
1.509 + cur_rto *= 1000;
1.510 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.511 + sctp_log_fr(cur_rto,
1.512 + stcb->asoc.peers_rwnd,
1.513 + window_probe,
1.514 + SCTP_FR_T3_MARK_TIME);
1.515 + sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT);
1.516 + sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
1.517 + }
1.518 + tv.tv_sec = cur_rto / 1000000;
1.519 + tv.tv_usec = cur_rto % 1000000;
1.520 +#ifndef __FreeBSD__
1.521 + timersub(&now, &tv, &min_wait);
1.522 +#else
1.523 + min_wait = now;
1.524 + timevalsub(&min_wait, &tv);
1.525 +#endif
1.526 + if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
1.527 + /*
1.528 + * if we hit here, we don't have enough seconds on the clock
1.529 + * to account for the RTO. We just let the lower seconds be
1.530 + * the bounds and don't worry about it. This may mean we
1.531 + * will mark a lot more than we should.
1.532 + */
1.533 + min_wait.tv_sec = min_wait.tv_usec = 0;
1.534 + }
1.535 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.536 + sctp_log_fr(cur_rto, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
1.537 + sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
1.538 + }
1.539 + /*
1.540 + * Our rwnd will be incorrect here since we are not adding back the
1.541 + * cnt * mbuf but we will fix that down below.
1.542 + */
1.543 + orig_flight = net->flight_size;
1.544 + orig_tf = stcb->asoc.total_flight;
1.545 +
1.546 + net->fast_retran_ip = 0;
1.547 + /* Now on to each chunk */
1.548 + cnt_abandoned = 0;
1.549 + num_mk = cnt_mk = 0;
1.550 + tsnfirst = tsnlast = 0;
1.551 +#ifndef INVARIANTS
1.552 + start_again:
1.553 +#endif
1.554 + TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) {
1.555 + if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.TSN_seq)) {
1.556 + /* Strange case our list got out of order? */
1.557 + SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n",
1.558 + (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.TSN_seq);
1.559 + recovery_cnt++;
1.560 +#ifdef INVARIANTS
1.561 + panic("last acked >= chk on sent-Q");
1.562 +#else
1.563 + SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt);
1.564 + sctp_recover_sent_list(stcb);
1.565 + if (recovery_cnt < 10) {
1.566 + goto start_again;
1.567 + } else {
1.568 + SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt);
1.569 + }
1.570 +#endif
1.571 + }
1.572 + if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) {
1.573 + /*
1.574 + * found one to mark: If it is less than
1.575 + * DATAGRAM_ACKED it MUST not be a skipped or marked
1.576 + * TSN but instead one that is either already set
1.577 + * for retransmission OR one that needs
1.578 + * retransmission.
1.579 + */
1.580 +
1.581 + /* validate its been outstanding long enough */
1.582 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.583 + sctp_log_fr(chk->rec.data.TSN_seq,
1.584 + chk->sent_rcv_time.tv_sec,
1.585 + chk->sent_rcv_time.tv_usec,
1.586 + SCTP_FR_T3_MARK_TIME);
1.587 + }
1.588 + if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) {
1.589 + /*
1.590 + * we have reached a chunk that was sent
1.591 + * some seconds past our min.. forget it we
1.592 + * will find no more to send.
1.593 + */
1.594 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.595 + sctp_log_fr(0,
1.596 + chk->sent_rcv_time.tv_sec,
1.597 + chk->sent_rcv_time.tv_usec,
1.598 + SCTP_FR_T3_STOPPED);
1.599 + }
1.600 + continue;
1.601 + } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) &&
1.602 + (window_probe == 0)) {
1.603 + /*
1.604 + * we must look at the micro seconds to
1.605 + * know.
1.606 + */
1.607 + if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
1.608 + /*
1.609 + * ok it was sent after our boundary
1.610 + * time.
1.611 + */
1.612 + continue;
1.613 + }
1.614 + }
1.615 + if (stcb->asoc.peer_supports_prsctp && PR_SCTP_TTL_ENABLED(chk->flags)) {
1.616 + /* Is it expired? */
1.617 +#ifndef __FreeBSD__
1.618 + if (timercmp(&now, &chk->rec.data.timetodrop, >)) {
1.619 +#else
1.620 + if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) {
1.621 +#endif
1.622 + /* Yes so drop it */
1.623 + if (chk->data) {
1.624 + (void)sctp_release_pr_sctp_chunk(stcb,
1.625 + chk,
1.626 + 1,
1.627 + SCTP_SO_NOT_LOCKED);
1.628 + cnt_abandoned++;
1.629 + }
1.630 + continue;
1.631 + }
1.632 + }
1.633 + if (stcb->asoc.peer_supports_prsctp && PR_SCTP_RTX_ENABLED(chk->flags)) {
1.634 + /* Has it been retransmitted tv_sec times? */
1.635 + if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) {
1.636 + if (chk->data) {
1.637 + (void)sctp_release_pr_sctp_chunk(stcb,
1.638 + chk,
1.639 + 1,
1.640 + SCTP_SO_NOT_LOCKED);
1.641 + cnt_abandoned++;
1.642 + }
1.643 + continue;
1.644 + }
1.645 + }
1.646 + if (chk->sent < SCTP_DATAGRAM_RESEND) {
1.647 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.648 + num_mk++;
1.649 + if (fir == 0) {
1.650 + fir = 1;
1.651 + tsnfirst = chk->rec.data.TSN_seq;
1.652 + }
1.653 + tsnlast = chk->rec.data.TSN_seq;
1.654 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.655 + sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count,
1.656 + 0, SCTP_FR_T3_MARKED);
1.657 + }
1.658 +
1.659 + if (chk->rec.data.chunk_was_revoked) {
1.660 + /* deflate the cwnd */
1.661 + chk->whoTo->cwnd -= chk->book_size;
1.662 + chk->rec.data.chunk_was_revoked = 0;
1.663 + }
1.664 + net->marked_retrans++;
1.665 + stcb->asoc.marked_retrans++;
1.666 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
1.667 + sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO,
1.668 + chk->whoTo->flight_size,
1.669 + chk->book_size,
1.670 + (uintptr_t)chk->whoTo,
1.671 + chk->rec.data.TSN_seq);
1.672 + }
1.673 + sctp_flight_size_decrease(chk);
1.674 + sctp_total_flight_decrease(stcb, chk);
1.675 + stcb->asoc.peers_rwnd += chk->send_size;
1.676 + stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
1.677 + }
1.678 + chk->sent = SCTP_DATAGRAM_RESEND;
1.679 + SCTP_STAT_INCR(sctps_markedretrans);
1.680 +
1.681 + /* reset the TSN for striking and other FR stuff */
1.682 + chk->rec.data.doing_fast_retransmit = 0;
1.683 + /* Clear any time so NO RTT is being done */
1.684 +
1.685 + if (chk->do_rtt) {
1.686 + if (chk->whoTo->rto_needed == 0) {
1.687 + chk->whoTo->rto_needed = 1;
1.688 + }
1.689 + }
1.690 + chk->do_rtt = 0;
1.691 + if (alt != net) {
1.692 + sctp_free_remote_addr(chk->whoTo);
1.693 + chk->no_fr_allowed = 1;
1.694 + chk->whoTo = alt;
1.695 + atomic_add_int(&alt->ref_count, 1);
1.696 + } else {
1.697 + chk->no_fr_allowed = 0;
1.698 + if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
1.699 + chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
1.700 + } else {
1.701 + chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
1.702 + }
1.703 + }
1.704 + /* CMT: Do not allow FRs on retransmitted TSNs.
1.705 + */
1.706 + if (stcb->asoc.sctp_cmt_on_off > 0) {
1.707 + chk->no_fr_allowed = 1;
1.708 + }
1.709 +#ifdef THIS_SHOULD_NOT_BE_DONE
1.710 + } else if (chk->sent == SCTP_DATAGRAM_ACKED) {
1.711 + /* remember highest acked one */
1.712 + could_be_sent = chk;
1.713 +#endif
1.714 + }
1.715 + if (chk->sent == SCTP_DATAGRAM_RESEND) {
1.716 + cnt_mk++;
1.717 + }
1.718 + }
1.719 + if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) {
1.720 + /* we did not subtract the same things? */
1.721 + audit_tf = 1;
1.722 + }
1.723 +
1.724 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.725 + sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
1.726 + }
1.727 +#ifdef SCTP_DEBUG
1.728 + if (num_mk) {
1.729 + SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
1.730 + tsnlast);
1.731 + SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%ld\n",
1.732 + num_mk, (u_long)stcb->asoc.peers_rwnd);
1.733 + SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n",
1.734 + tsnlast);
1.735 + SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%d\n",
1.736 + num_mk,
1.737 + (int)stcb->asoc.peers_rwnd);
1.738 + }
1.739 +#endif
1.740 + *num_marked = num_mk;
1.741 + *num_abandoned = cnt_abandoned;
1.742 + /* Now check for a ECN Echo that may be stranded And
1.743 + * include the cnt_mk'd to have all resends in the
1.744 + * control queue.
1.745 + */
1.746 + TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1.747 + if (chk->sent == SCTP_DATAGRAM_RESEND) {
1.748 + cnt_mk++;
1.749 + }
1.750 + if ((chk->whoTo == net) &&
1.751 + (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1.752 + sctp_free_remote_addr(chk->whoTo);
1.753 + chk->whoTo = alt;
1.754 + if (chk->sent != SCTP_DATAGRAM_RESEND) {
1.755 + chk->sent = SCTP_DATAGRAM_RESEND;
1.756 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.757 + cnt_mk++;
1.758 + }
1.759 + atomic_add_int(&alt->ref_count, 1);
1.760 + }
1.761 + }
1.762 +#ifdef THIS_SHOULD_NOT_BE_DONE
1.763 + if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) {
1.764 + /* fix it so we retransmit the highest acked anyway */
1.765 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.766 + cnt_mk++;
1.767 + could_be_sent->sent = SCTP_DATAGRAM_RESEND;
1.768 + }
1.769 +#endif
1.770 + if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
1.771 +#ifdef INVARIANTS
1.772 + SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n",
1.773 + cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk);
1.774 +#endif
1.775 +#ifndef SCTP_AUDITING_ENABLED
1.776 + stcb->asoc.sent_queue_retran_cnt = cnt_mk;
1.777 +#endif
1.778 + }
1.779 + if (audit_tf) {
1.780 + SCTPDBG(SCTP_DEBUG_TIMER4,
1.781 + "Audit total flight due to negative value net:%p\n",
1.782 + (void *)net);
1.783 + stcb->asoc.total_flight = 0;
1.784 + stcb->asoc.total_flight_count = 0;
1.785 + /* Clear all networks flight size */
1.786 + TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) {
1.787 + lnets->flight_size = 0;
1.788 + SCTPDBG(SCTP_DEBUG_TIMER4,
1.789 + "Net:%p c-f cwnd:%d ssthresh:%d\n",
1.790 + (void *)lnets, lnets->cwnd, lnets->ssthresh);
1.791 + }
1.792 + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1.793 + if (chk->sent < SCTP_DATAGRAM_RESEND) {
1.794 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
1.795 + sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
1.796 + chk->whoTo->flight_size,
1.797 + chk->book_size,
1.798 + (uintptr_t)chk->whoTo,
1.799 + chk->rec.data.TSN_seq);
1.800 + }
1.801 +
1.802 + sctp_flight_size_increase(chk);
1.803 + sctp_total_flight_increase(stcb, chk);
1.804 + }
1.805 + }
1.806 + }
1.807 + /* We return 1 if we only have a window probe outstanding */
1.808 + return (0);
1.809 +}
1.810 +
1.811 +
1.812 +int
1.813 +sctp_t3rxt_timer(struct sctp_inpcb *inp,
1.814 + struct sctp_tcb *stcb,
1.815 + struct sctp_nets *net)
1.816 +{
1.817 + struct sctp_nets *alt;
1.818 + int win_probe, num_mk, num_abandoned;
1.819 +
1.820 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) {
1.821 + sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
1.822 + }
1.823 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
1.824 + struct sctp_nets *lnet;
1.825 +
1.826 + TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
1.827 + if (net == lnet) {
1.828 + sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3);
1.829 + } else {
1.830 + sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3);
1.831 + }
1.832 + }
1.833 + }
1.834 + /* Find an alternate and mark those for retransmission */
1.835 + if ((stcb->asoc.peers_rwnd == 0) &&
1.836 + (stcb->asoc.total_flight < net->mtu)) {
1.837 + SCTP_STAT_INCR(sctps_timowindowprobe);
1.838 + win_probe = 1;
1.839 + } else {
1.840 + win_probe = 0;
1.841 + }
1.842 +
1.843 + if (win_probe == 0) {
1.844 + /* We don't do normal threshold management on window probes */
1.845 + if (sctp_threshold_management(inp, stcb, net,
1.846 + stcb->asoc.max_send_times)) {
1.847 + /* Association was destroyed */
1.848 + return (1);
1.849 + } else {
1.850 + if (net != stcb->asoc.primary_destination) {
1.851 + /* send a immediate HB if our RTO is stale */
1.852 + struct timeval now;
1.853 + unsigned int ms_goneby;
1.854 +
1.855 + (void)SCTP_GETTIME_TIMEVAL(&now);
1.856 + if (net->last_sent_time.tv_sec) {
1.857 + ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000;
1.858 + } else {
1.859 + ms_goneby = 0;
1.860 + }
1.861 + if ((net->dest_state & SCTP_ADDR_PF) == 0) {
1.862 + if ((ms_goneby > net->RTO) || (net->RTO == 0)) {
1.863 + /*
1.864 + * no recent feed back in an RTO or
1.865 + * more, request a RTT update
1.866 + */
1.867 + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1.868 + }
1.869 + }
1.870 + }
1.871 + }
1.872 + } else {
1.873 + /*
1.874 + * For a window probe we don't penalize the net's but only
1.875 + * the association. This may fail it if SACKs are not coming
1.876 + * back. If sack's are coming with rwnd locked at 0, we will
1.877 + * continue to hold things waiting for rwnd to raise
1.878 + */
1.879 + if (sctp_threshold_management(inp, stcb, NULL,
1.880 + stcb->asoc.max_send_times)) {
1.881 + /* Association was destroyed */
1.882 + return (1);
1.883 + }
1.884 + }
1.885 + if (stcb->asoc.sctp_cmt_on_off > 0) {
1.886 + if (net->pf_threshold < net->failure_threshold) {
1.887 + alt = sctp_find_alternate_net(stcb, net, 2);
1.888 + } else {
1.889 + /*
1.890 + * CMT: Using RTX_SSTHRESH policy for CMT.
1.891 + * If CMT is being used, then pick dest with
1.892 + * largest ssthresh for any retransmission.
1.893 + */
1.894 + alt = sctp_find_alternate_net(stcb, net, 1);
1.895 + /*
1.896 + * CUCv2: If a different dest is picked for
1.897 + * the retransmission, then new
1.898 + * (rtx-)pseudo_cumack needs to be tracked
1.899 + * for orig dest. Let CUCv2 track new (rtx-)
1.900 + * pseudo-cumack always.
1.901 + */
1.902 + net->find_pseudo_cumack = 1;
1.903 + net->find_rtx_pseudo_cumack = 1;
1.904 + }
1.905 + } else {
1.906 + alt = sctp_find_alternate_net(stcb, net, 0);
1.907 + }
1.908 +
1.909 + num_mk = 0;
1.910 + num_abandoned = 0;
1.911 + (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe,
1.912 + &num_mk, &num_abandoned);
1.913 + /* FR Loss recovery just ended with the T3. */
1.914 + stcb->asoc.fast_retran_loss_recovery = 0;
1.915 +
1.916 + /* CMT FR loss recovery ended with the T3 */
1.917 + net->fast_retran_loss_recovery = 0;
1.918 + if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
1.919 + (net->flight_size == 0)) {
1.920 + (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins)(stcb, net);
1.921 + }
1.922 +
1.923 + /*
1.924 + * setup the sat loss recovery that prevents satellite cwnd advance.
1.925 + */
1.926 + stcb->asoc.sat_t3_loss_recovery = 1;
1.927 + stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq;
1.928 +
1.929 + /* Backoff the timer and cwnd */
1.930 + sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned);
1.931 + if ((!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
1.932 + (net->dest_state & SCTP_ADDR_PF)) {
1.933 + /* Move all pending over too */
1.934 + sctp_move_chunks_from_net(stcb, net);
1.935 +
1.936 + /* Get the address that failed, to
1.937 + * force a new src address selecton and
1.938 + * a route allocation.
1.939 + */
1.940 + if (net->ro._s_addr) {
1.941 + sctp_free_ifa(net->ro._s_addr);
1.942 + net->ro._s_addr = NULL;
1.943 + }
1.944 + net->src_addr_selected = 0;
1.945 +
1.946 + /* Force a route allocation too */
1.947 + if (net->ro.ro_rt) {
1.948 + RTFREE(net->ro.ro_rt);
1.949 + net->ro.ro_rt = NULL;
1.950 + }
1.951 +
1.952 + /* Was it our primary? */
1.953 + if ((stcb->asoc.primary_destination == net) && (alt != net)) {
1.954 + /*
1.955 + * Yes, note it as such and find an alternate note:
1.956 + * this means HB code must use this to resent the
1.957 + * primary if it goes active AND if someone does a
1.958 + * change-primary then this flag must be cleared
1.959 + * from any net structures.
1.960 + */
1.961 + if (stcb->asoc.alternate) {
1.962 + sctp_free_remote_addr(stcb->asoc.alternate);
1.963 + }
1.964 + stcb->asoc.alternate = alt;
1.965 + atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
1.966 + }
1.967 + }
1.968 + /*
1.969 + * Special case for cookie-echo'ed case, we don't do output but must
1.970 + * await the COOKIE-ACK before retransmission
1.971 + */
1.972 + if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
1.973 + /*
1.974 + * Here we just reset the timer and start again since we
1.975 + * have not established the asoc
1.976 + */
1.977 + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
1.978 + return (0);
1.979 + }
1.980 + if (stcb->asoc.peer_supports_prsctp) {
1.981 + struct sctp_tmit_chunk *lchk;
1.982 +
1.983 + lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc);
1.984 + /* C3. See if we need to send a Fwd-TSN */
1.985 + if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) {
1.986 + send_forward_tsn(stcb, &stcb->asoc);
1.987 + if (lchk) {
1.988 + /* Assure a timer is up */
1.989 + sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
1.990 + }
1.991 + }
1.992 + }
1.993 + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) {
1.994 + sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
1.995 + }
1.996 + return (0);
1.997 +}
1.998 +
1.999 +int
1.1000 +sctp_t1init_timer(struct sctp_inpcb *inp,
1.1001 + struct sctp_tcb *stcb,
1.1002 + struct sctp_nets *net)
1.1003 +{
1.1004 + /* bump the thresholds */
1.1005 + if (stcb->asoc.delayed_connection) {
1.1006 + /*
1.1007 + * special hook for delayed connection. The library did NOT
1.1008 + * complete the rest of its sends.
1.1009 + */
1.1010 + stcb->asoc.delayed_connection = 0;
1.1011 + sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1.1012 + return (0);
1.1013 + }
1.1014 + if (SCTP_GET_STATE((&stcb->asoc)) != SCTP_STATE_COOKIE_WAIT) {
1.1015 + return (0);
1.1016 + }
1.1017 + if (sctp_threshold_management(inp, stcb, net,
1.1018 + stcb->asoc.max_init_times)) {
1.1019 + /* Association was destroyed */
1.1020 + return (1);
1.1021 + }
1.1022 + stcb->asoc.dropped_special_cnt = 0;
1.1023 + sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0);
1.1024 + if (stcb->asoc.initial_init_rto_max < net->RTO) {
1.1025 + net->RTO = stcb->asoc.initial_init_rto_max;
1.1026 + }
1.1027 + if (stcb->asoc.numnets > 1) {
1.1028 + /* If we have more than one addr use it */
1.1029 + struct sctp_nets *alt;
1.1030 +
1.1031 + alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0);
1.1032 + if (alt != stcb->asoc.primary_destination) {
1.1033 + sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination);
1.1034 + stcb->asoc.primary_destination = alt;
1.1035 + }
1.1036 + }
1.1037 + /* Send out a new init */
1.1038 + sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED);
1.1039 + return (0);
1.1040 +}
1.1041 +
1.1042 +/*
1.1043 + * For cookie and asconf we actually need to find and mark for resend, then
1.1044 + * increment the resend counter (after all the threshold management stuff of
1.1045 + * course).
1.1046 + */
1.1047 +int
1.1048 +sctp_cookie_timer(struct sctp_inpcb *inp,
1.1049 + struct sctp_tcb *stcb,
1.1050 + struct sctp_nets *net SCTP_UNUSED)
1.1051 +{
1.1052 + struct sctp_nets *alt;
1.1053 + struct sctp_tmit_chunk *cookie;
1.1054 +
1.1055 + /* first before all else we must find the cookie */
1.1056 + TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) {
1.1057 + if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
1.1058 + break;
1.1059 + }
1.1060 + }
1.1061 + if (cookie == NULL) {
1.1062 + if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
1.1063 + /* FOOBAR! */
1.1064 + struct mbuf *oper;
1.1065 +
1.1066 + oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
1.1067 + 0, M_NOWAIT, 1, MT_DATA);
1.1068 + if (oper) {
1.1069 + struct sctp_paramhdr *ph;
1.1070 + uint32_t *ippp;
1.1071 +
1.1072 + SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) +
1.1073 + sizeof(uint32_t);
1.1074 + ph = mtod(oper, struct sctp_paramhdr *);
1.1075 + ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
1.1076 + ph->param_length = htons(SCTP_BUF_LEN(oper));
1.1077 + ippp = (uint32_t *) (ph + 1);
1.1078 + *ippp = htonl(SCTP_FROM_SCTP_TIMER+SCTP_LOC_3);
1.1079 + }
1.1080 + inp->last_abort_code = SCTP_FROM_SCTP_TIMER+SCTP_LOC_4;
1.1081 + sctp_abort_an_association(inp, stcb, oper, SCTP_SO_NOT_LOCKED);
1.1082 + } else {
1.1083 +#ifdef INVARIANTS
1.1084 + panic("Cookie timer expires in wrong state?");
1.1085 +#else
1.1086 + SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc));
1.1087 + return (0);
1.1088 +#endif
1.1089 + }
1.1090 + return (0);
1.1091 + }
1.1092 + /* Ok we found the cookie, threshold management next */
1.1093 + if (sctp_threshold_management(inp, stcb, cookie->whoTo,
1.1094 + stcb->asoc.max_init_times)) {
1.1095 + /* Assoc is over */
1.1096 + return (1);
1.1097 + }
1.1098 + /*
1.1099 + * cleared theshold management now lets backoff the address & select
1.1100 + * an alternate
1.1101 + */
1.1102 + stcb->asoc.dropped_special_cnt = 0;
1.1103 + sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0);
1.1104 + alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0);
1.1105 + if (alt != cookie->whoTo) {
1.1106 + sctp_free_remote_addr(cookie->whoTo);
1.1107 + cookie->whoTo = alt;
1.1108 + atomic_add_int(&alt->ref_count, 1);
1.1109 + }
1.1110 + /* Now mark the retran info */
1.1111 + if (cookie->sent != SCTP_DATAGRAM_RESEND) {
1.1112 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.1113 + }
1.1114 + cookie->sent = SCTP_DATAGRAM_RESEND;
1.1115 + /*
1.1116 + * Now call the output routine to kick out the cookie again, Note we
1.1117 + * don't mark any chunks for retran so that FR will need to kick in
1.1118 + * to move these (or a send timer).
1.1119 + */
1.1120 + return (0);
1.1121 +}
1.1122 +
1.1123 +int
1.1124 +sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.1125 + struct sctp_nets *net)
1.1126 +{
1.1127 + struct sctp_nets *alt;
1.1128 + struct sctp_tmit_chunk *strrst = NULL, *chk = NULL;
1.1129 +
1.1130 + if (stcb->asoc.stream_reset_outstanding == 0) {
1.1131 + return (0);
1.1132 + }
1.1133 + /* find the existing STRRESET, we use the seq number we sent out on */
1.1134 + (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
1.1135 + if (strrst == NULL) {
1.1136 + return (0);
1.1137 + }
1.1138 + /* do threshold management */
1.1139 + if (sctp_threshold_management(inp, stcb, strrst->whoTo,
1.1140 + stcb->asoc.max_send_times)) {
1.1141 + /* Assoc is over */
1.1142 + return (1);
1.1143 + }
1.1144 + /*
1.1145 + * cleared theshold management now lets backoff the address & select
1.1146 + * an alternate
1.1147 + */
1.1148 + sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0, 0);
1.1149 + alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0);
1.1150 + sctp_free_remote_addr(strrst->whoTo);
1.1151 + strrst->whoTo = alt;
1.1152 + atomic_add_int(&alt->ref_count, 1);
1.1153 +
1.1154 + /* See if a ECN Echo is also stranded */
1.1155 + TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1.1156 + if ((chk->whoTo == net) &&
1.1157 + (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1.1158 + sctp_free_remote_addr(chk->whoTo);
1.1159 + if (chk->sent != SCTP_DATAGRAM_RESEND) {
1.1160 + chk->sent = SCTP_DATAGRAM_RESEND;
1.1161 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.1162 + }
1.1163 + chk->whoTo = alt;
1.1164 + atomic_add_int(&alt->ref_count, 1);
1.1165 + }
1.1166 + }
1.1167 + if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1.1168 + /*
1.1169 + * If the address went un-reachable, we need to move to
1.1170 + * alternates for ALL chk's in queue
1.1171 + */
1.1172 + sctp_move_chunks_from_net(stcb, net);
1.1173 + }
1.1174 + /* mark the retran info */
1.1175 + if (strrst->sent != SCTP_DATAGRAM_RESEND)
1.1176 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.1177 + strrst->sent = SCTP_DATAGRAM_RESEND;
1.1178 +
1.1179 + /* restart the timer */
1.1180 + sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo);
1.1181 + return (0);
1.1182 +}
1.1183 +
1.1184 +int
1.1185 +sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.1186 + struct sctp_nets *net)
1.1187 +{
1.1188 + struct sctp_nets *alt;
1.1189 + struct sctp_tmit_chunk *asconf, *chk;
1.1190 +
1.1191 + /* is this a first send, or a retransmission? */
1.1192 + if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) {
1.1193 + /* compose a new ASCONF chunk and send it */
1.1194 + sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED);
1.1195 + } else {
1.1196 + /*
1.1197 + * Retransmission of the existing ASCONF is needed
1.1198 + */
1.1199 +
1.1200 + /* find the existing ASCONF */
1.1201 + asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue);
1.1202 + if (asconf == NULL) {
1.1203 + return (0);
1.1204 + }
1.1205 + /* do threshold management */
1.1206 + if (sctp_threshold_management(inp, stcb, asconf->whoTo,
1.1207 + stcb->asoc.max_send_times)) {
1.1208 + /* Assoc is over */
1.1209 + return (1);
1.1210 + }
1.1211 + if (asconf->snd_count > stcb->asoc.max_send_times) {
1.1212 + /*
1.1213 + * Something is rotten: our peer is not responding to
1.1214 + * ASCONFs but apparently is to other chunks. i.e. it
1.1215 + * is not properly handling the chunk type upper bits.
1.1216 + * Mark this peer as ASCONF incapable and cleanup.
1.1217 + */
1.1218 + SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n");
1.1219 + sctp_asconf_cleanup(stcb, net);
1.1220 + return (0);
1.1221 + }
1.1222 + /*
1.1223 + * cleared threshold management, so now backoff the net and
1.1224 + * select an alternate
1.1225 + */
1.1226 + sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0, 0);
1.1227 + alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0);
1.1228 + if (asconf->whoTo != alt) {
1.1229 + sctp_free_remote_addr(asconf->whoTo);
1.1230 + asconf->whoTo = alt;
1.1231 + atomic_add_int(&alt->ref_count, 1);
1.1232 + }
1.1233 +
1.1234 + /* See if an ECN Echo is also stranded */
1.1235 + TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
1.1236 + if ((chk->whoTo == net) &&
1.1237 + (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) {
1.1238 + sctp_free_remote_addr(chk->whoTo);
1.1239 + chk->whoTo = alt;
1.1240 + if (chk->sent != SCTP_DATAGRAM_RESEND) {
1.1241 + chk->sent = SCTP_DATAGRAM_RESEND;
1.1242 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.1243 + }
1.1244 + atomic_add_int(&alt->ref_count, 1);
1.1245 + }
1.1246 + }
1.1247 + TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) {
1.1248 + if (chk->whoTo != alt) {
1.1249 + sctp_free_remote_addr(chk->whoTo);
1.1250 + chk->whoTo = alt;
1.1251 + atomic_add_int(&alt->ref_count, 1);
1.1252 + }
1.1253 + if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT)
1.1254 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.1255 + chk->sent = SCTP_DATAGRAM_RESEND;
1.1256 + }
1.1257 + if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
1.1258 + /*
1.1259 + * If the address went un-reachable, we need to move
1.1260 + * to the alternate for ALL chunks in queue
1.1261 + */
1.1262 + sctp_move_chunks_from_net(stcb, net);
1.1263 + }
1.1264 + /* mark the retran info */
1.1265 + if (asconf->sent != SCTP_DATAGRAM_RESEND)
1.1266 + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1.1267 + asconf->sent = SCTP_DATAGRAM_RESEND;
1.1268 +
1.1269 + /* send another ASCONF if any and we can do */
1.1270 + sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED);
1.1271 + }
1.1272 + return (0);
1.1273 +}
1.1274 +
1.1275 +/* Mobility adaptation */
1.1276 +void
1.1277 +sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.1278 + struct sctp_nets *net SCTP_UNUSED)
1.1279 +{
1.1280 + if (stcb->asoc.deleted_primary == NULL) {
1.1281 + SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n");
1.1282 + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1.1283 + return;
1.1284 + }
1.1285 + SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary ");
1.1286 + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa);
1.1287 + sctp_free_remote_addr(stcb->asoc.deleted_primary);
1.1288 + stcb->asoc.deleted_primary = NULL;
1.1289 + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
1.1290 + return;
1.1291 +}
1.1292 +
1.1293 +/*
1.1294 + * For the shutdown and shutdown-ack, we do not keep one around on the
1.1295 + * control queue. This means we must generate a new one and call the general
1.1296 + * chunk output routine, AFTER having done threshold management.
1.1297 + * It is assumed that net is non-NULL.
1.1298 + */
1.1299 +int
1.1300 +sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.1301 + struct sctp_nets *net)
1.1302 +{
1.1303 + struct sctp_nets *alt;
1.1304 +
1.1305 + /* first threshold managment */
1.1306 + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1.1307 + /* Assoc is over */
1.1308 + return (1);
1.1309 + }
1.1310 + sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1.1311 + /* second select an alternative */
1.1312 + alt = sctp_find_alternate_net(stcb, net, 0);
1.1313 +
1.1314 + /* third generate a shutdown into the queue for out net */
1.1315 + sctp_send_shutdown(stcb, alt);
1.1316 +
1.1317 + /* fourth restart timer */
1.1318 + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt);
1.1319 + return (0);
1.1320 +}
1.1321 +
1.1322 +int
1.1323 +sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.1324 + struct sctp_nets *net)
1.1325 +{
1.1326 + struct sctp_nets *alt;
1.1327 +
1.1328 + /* first threshold managment */
1.1329 + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1.1330 + /* Assoc is over */
1.1331 + return (1);
1.1332 + }
1.1333 + sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1.1334 + /* second select an alternative */
1.1335 + alt = sctp_find_alternate_net(stcb, net, 0);
1.1336 +
1.1337 + /* third generate a shutdown into the queue for out net */
1.1338 + sctp_send_shutdown_ack(stcb, alt);
1.1339 +
1.1340 + /* fourth restart timer */
1.1341 + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt);
1.1342 + return (0);
1.1343 +}
1.1344 +
1.1345 +static void
1.1346 +sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp,
1.1347 + struct sctp_tcb *stcb)
1.1348 +{
1.1349 + struct sctp_stream_queue_pending *sp;
1.1350 + unsigned int i, chks_in_queue = 0;
1.1351 + int being_filled = 0;
1.1352 + /*
1.1353 + * This function is ONLY called when the send/sent queues are empty.
1.1354 + */
1.1355 + if ((stcb == NULL) || (inp == NULL))
1.1356 + return;
1.1357 +
1.1358 + if (stcb->asoc.sent_queue_retran_cnt) {
1.1359 + SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n",
1.1360 + stcb->asoc.sent_queue_retran_cnt);
1.1361 + stcb->asoc.sent_queue_retran_cnt = 0;
1.1362 + }
1.1363 + if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1.1364 + /* No stream scheduler information, initialize scheduler */
1.1365 + stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 0);
1.1366 + if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) {
1.1367 + /* yep, we lost a stream or two */
1.1368 + SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n");
1.1369 + } else {
1.1370 + /* no streams lost */
1.1371 + stcb->asoc.total_output_queue_size = 0;
1.1372 + }
1.1373 + }
1.1374 + /* Check to see if some data queued, if so report it */
1.1375 + for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1.1376 + if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
1.1377 + TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
1.1378 + if (sp->msg_is_complete)
1.1379 + being_filled++;
1.1380 + chks_in_queue++;
1.1381 + }
1.1382 + }
1.1383 + }
1.1384 + if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
1.1385 + SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n",
1.1386 + stcb->asoc.stream_queue_cnt, chks_in_queue);
1.1387 + }
1.1388 + if (chks_in_queue) {
1.1389 + /* call the output queue function */
1.1390 + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
1.1391 + if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1.1392 + (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1.1393 + /*
1.1394 + * Probably should go in and make it go back through
1.1395 + * and add fragments allowed
1.1396 + */
1.1397 + if (being_filled == 0) {
1.1398 + SCTP_PRINTF("Still nothing moved %d chunks are stuck\n",
1.1399 + chks_in_queue);
1.1400 + }
1.1401 + }
1.1402 + } else {
1.1403 + SCTP_PRINTF("Found no chunks on any queue tot:%lu\n",
1.1404 + (u_long)stcb->asoc.total_output_queue_size);
1.1405 + stcb->asoc.total_output_queue_size = 0;
1.1406 + }
1.1407 +}
1.1408 +
1.1409 +int
1.1410 +sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
1.1411 + struct sctp_nets *net)
1.1412 +{
1.1413 + uint8_t net_was_pf;
1.1414 +
1.1415 + if (net->dest_state & SCTP_ADDR_PF) {
1.1416 + net_was_pf = 1;
1.1417 + } else {
1.1418 + net_was_pf = 0;
1.1419 + }
1.1420 + if (net->hb_responded == 0) {
1.1421 + if (net->ro._s_addr) {
1.1422 + /* Invalidate the src address if we did not get
1.1423 + * a response last time.
1.1424 + */
1.1425 + sctp_free_ifa(net->ro._s_addr);
1.1426 + net->ro._s_addr = NULL;
1.1427 + net->src_addr_selected = 0;
1.1428 + }
1.1429 + sctp_backoff_on_timeout(stcb, net, 1, 0, 0);
1.1430 + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
1.1431 + /* Assoc is over */
1.1432 + return (1);
1.1433 + }
1.1434 + }
1.1435 + /* Zero PBA, if it needs it */
1.1436 + if (net->partial_bytes_acked) {
1.1437 + net->partial_bytes_acked = 0;
1.1438 + }
1.1439 + if ((stcb->asoc.total_output_queue_size > 0) &&
1.1440 + (TAILQ_EMPTY(&stcb->asoc.send_queue)) &&
1.1441 + (TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
1.1442 + sctp_audit_stream_queues_for_size(inp, stcb);
1.1443 + }
1.1444 + if (!(net->dest_state & SCTP_ADDR_NOHB) &&
1.1445 + !((net_was_pf == 0) && (net->dest_state & SCTP_ADDR_PF))) {
1.1446 + /* when move to PF during threshold mangement, a HB has been
1.1447 + queued in that routine */
1.1448 + uint32_t ms_gone_by;
1.1449 +
1.1450 + if ((net->last_sent_time.tv_sec > 0) ||
1.1451 + (net->last_sent_time.tv_usec > 0)) {
1.1452 +#ifdef __FreeBSD__
1.1453 + struct timeval diff;
1.1454 +
1.1455 + SCTP_GETTIME_TIMEVAL(&diff);
1.1456 + timevalsub(&diff, &net->last_sent_time);
1.1457 +#else
1.1458 + struct timeval diff, now;
1.1459 +
1.1460 + SCTP_GETTIME_TIMEVAL(&now);
1.1461 + timersub(&now, &net->last_sent_time, &diff);
1.1462 +#endif
1.1463 + ms_gone_by = (uint32_t)(diff.tv_sec * 1000) +
1.1464 + (uint32_t)(diff.tv_usec / 1000);
1.1465 + } else {
1.1466 + ms_gone_by = 0xffffffff;
1.1467 + }
1.1468 + if ((ms_gone_by >= net->heart_beat_delay) ||
1.1469 + (net->dest_state & SCTP_ADDR_PF)) {
1.1470 + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
1.1471 + }
1.1472 + }
1.1473 + return (0);
1.1474 +}
1.1475 +
1.1476 +void
1.1477 +sctp_pathmtu_timer(struct sctp_inpcb *inp,
1.1478 + struct sctp_tcb *stcb,
1.1479 + struct sctp_nets *net)
1.1480 +{
1.1481 + uint32_t next_mtu, mtu;
1.1482 +
1.1483 + next_mtu = sctp_get_next_mtu(net->mtu);
1.1484 +
1.1485 + if ((next_mtu > net->mtu) && (net->port == 0)) {
1.1486 + if ((net->src_addr_selected == 0) ||
1.1487 + (net->ro._s_addr == NULL) ||
1.1488 + (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1.1489 + if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) {
1.1490 + sctp_free_ifa(net->ro._s_addr);
1.1491 + net->ro._s_addr = NULL;
1.1492 + net->src_addr_selected = 0;
1.1493 + } else if (net->ro._s_addr == NULL) {
1.1494 +#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1.1495 + if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1.1496 + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1.1497 + /* KAME hack: embed scopeid */
1.1498 +#if defined(__APPLE__)
1.1499 +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
1.1500 + (void)in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL);
1.1501 +#else
1.1502 + (void)in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL);
1.1503 +#endif
1.1504 +#elif defined(SCTP_KAME)
1.1505 + (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
1.1506 +#else
1.1507 + (void)in6_embedscope(&sin6->sin6_addr, sin6);
1.1508 +#endif
1.1509 + }
1.1510 +#endif
1.1511 +
1.1512 + net->ro._s_addr = sctp_source_address_selection(inp,
1.1513 + stcb,
1.1514 + (sctp_route_t *)&net->ro,
1.1515 + net, 0, stcb->asoc.vrf_id);
1.1516 +#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE)
1.1517 + if (net->ro._l_addr.sa.sa_family == AF_INET6) {
1.1518 + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1.1519 +#ifdef SCTP_KAME
1.1520 + (void)sa6_recoverscope(sin6);
1.1521 +#else
1.1522 + (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
1.1523 +#endif /* SCTP_KAME */
1.1524 + }
1.1525 +#endif /* INET6 */
1.1526 + }
1.1527 + if (net->ro._s_addr)
1.1528 + net->src_addr_selected = 1;
1.1529 + }
1.1530 + if (net->ro._s_addr) {
1.1531 + mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt);
1.1532 + if (net->port) {
1.1533 + mtu -= sizeof(struct udphdr);
1.1534 + }
1.1535 + if (mtu > next_mtu) {
1.1536 + net->mtu = next_mtu;
1.1537 + }
1.1538 + }
1.1539 + }
1.1540 + /* restart the timer */
1.1541 + sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
1.1542 +}
1.1543 +
1.1544 +void
1.1545 +sctp_autoclose_timer(struct sctp_inpcb *inp,
1.1546 + struct sctp_tcb *stcb,
1.1547 + struct sctp_nets *net)
1.1548 +{
1.1549 + struct timeval tn, *tim_touse;
1.1550 + struct sctp_association *asoc;
1.1551 + int ticks_gone_by;
1.1552 +
1.1553 + (void)SCTP_GETTIME_TIMEVAL(&tn);
1.1554 + if (stcb->asoc.sctp_autoclose_ticks &&
1.1555 + sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1.1556 + /* Auto close is on */
1.1557 + asoc = &stcb->asoc;
1.1558 + /* pick the time to use */
1.1559 + if (asoc->time_last_rcvd.tv_sec >
1.1560 + asoc->time_last_sent.tv_sec) {
1.1561 + tim_touse = &asoc->time_last_rcvd;
1.1562 + } else {
1.1563 + tim_touse = &asoc->time_last_sent;
1.1564 + }
1.1565 + /* Now has long enough transpired to autoclose? */
1.1566 + ticks_gone_by = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec);
1.1567 + if ((ticks_gone_by > 0) &&
1.1568 + (ticks_gone_by >= (int)asoc->sctp_autoclose_ticks)) {
1.1569 + /*
1.1570 + * autoclose time has hit, call the output routine,
1.1571 + * which should do nothing just to be SURE we don't
1.1572 + * have hanging data. We can then safely check the
1.1573 + * queues and know that we are clear to send
1.1574 + * shutdown
1.1575 + */
1.1576 + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
1.1577 + /* Are we clean? */
1.1578 + if (TAILQ_EMPTY(&asoc->send_queue) &&
1.1579 + TAILQ_EMPTY(&asoc->sent_queue)) {
1.1580 + /*
1.1581 + * there is nothing queued to send, so I'm
1.1582 + * done...
1.1583 + */
1.1584 + if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1.1585 + /* only send SHUTDOWN 1st time thru */
1.1586 + struct sctp_nets *netp;
1.1587 +
1.1588 + if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
1.1589 + (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1.1590 + SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1.1591 + }
1.1592 + SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
1.1593 + SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
1.1594 + sctp_stop_timers_for_shutdown(stcb);
1.1595 + if (stcb->asoc.alternate) {
1.1596 + netp = stcb->asoc.alternate;
1.1597 + } else {
1.1598 + netp = stcb->asoc.primary_destination;
1.1599 + }
1.1600 + sctp_send_shutdown(stcb, netp);
1.1601 + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
1.1602 + stcb->sctp_ep, stcb,
1.1603 + netp);
1.1604 + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1.1605 + stcb->sctp_ep, stcb,
1.1606 + netp);
1.1607 + }
1.1608 + }
1.1609 + } else {
1.1610 + /*
1.1611 + * No auto close at this time, reset t-o to check
1.1612 + * later
1.1613 + */
1.1614 + int tmp;
1.1615 +
1.1616 + /* fool the timer startup to use the time left */
1.1617 + tmp = asoc->sctp_autoclose_ticks;
1.1618 + asoc->sctp_autoclose_ticks -= ticks_gone_by;
1.1619 + sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1.1620 + net);
1.1621 + /* restore the real tick value */
1.1622 + asoc->sctp_autoclose_ticks = tmp;
1.1623 + }
1.1624 + }
1.1625 +}
1.1626 +
