diff options
Diffstat (limited to 'netwerk/sctp/src/netinet/sctp_timer.c')
| -rw-r--r-- | netwerk/sctp/src/netinet/sctp_timer.c | 1641 |
1 files changed, 1641 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_timer.c b/netwerk/sctp/src/netinet/sctp_timer.c new file mode 100644 index 0000000000..aa44dad688 --- /dev/null +++ b/netwerk/sctp/src/netinet/sctp_timer.c @@ -0,0 +1,1641 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. + * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * a) Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * b) Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * c) Neither the name of Cisco Systems, Inc. nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +#endif + +#define _IP_VHL +#include <netinet/sctp_os.h> +#include <netinet/sctp_pcb.h> +#ifdef INET6 +#if defined(__FreeBSD__) && defined(__Userspace__) +#include <netinet6/sctp6_var.h> +#endif +#endif +#include <netinet/sctp_var.h> +#include <netinet/sctp_sysctl.h> +#include <netinet/sctp_timer.h> +#include <netinet/sctputil.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_header.h> +#include <netinet/sctp_indata.h> +#include <netinet/sctp_asconf.h> +#include <netinet/sctp_input.h> +#include <netinet/sctp.h> +#include <netinet/sctp_uio.h> +#if defined(INET) || defined(INET6) +#if !(defined(_WIN32) && defined(__Userspace__)) +#include <netinet/udp.h> +#endif +#endif + +void +sctp_audit_retranmission_queue(struct sctp_association *asoc) +{ + struct sctp_tmit_chunk *chk; + + SCTPDBG(SCTP_DEBUG_TIMER4, "Audit invoked on send queue cnt:%d onqueue:%d\n", + asoc->sent_queue_retran_cnt, + asoc->sent_queue_cnt); + asoc->sent_queue_retran_cnt = 0; + asoc->sent_queue_cnt = 0; + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { + if (chk->sent == SCTP_DATAGRAM_RESEND) { + sctp_ucount_incr(asoc->sent_queue_retran_cnt); + } + asoc->sent_queue_cnt++; + } + TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { + if (chk->sent == SCTP_DATAGRAM_RESEND) { + sctp_ucount_incr(asoc->sent_queue_retran_cnt); + } + } + TAILQ_FOREACH(chk, &asoc->asconf_send_queue, sctp_next) { + if (chk->sent == SCTP_DATAGRAM_RESEND) { + sctp_ucount_incr(asoc->sent_queue_retran_cnt); + } + } + SCTPDBG(SCTP_DEBUG_TIMER4, "Audit completes retran:%d onqueue:%d\n", + asoc->sent_queue_retran_cnt, + asoc->sent_queue_cnt); +} + +static int +sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net, uint16_t threshold) +{ + if (net) { + net->error_count++; + SCTPDBG(SCTP_DEBUG_TIMER4, "Error count for %p now %d thresh:%d\n", + (void *)net, net->error_count, + net->failure_threshold); + if (net->error_count > net->failure_threshold) { + /* We had a threshold failure */ + if (net->dest_state & SCTP_ADDR_REACHABLE) { + net->dest_state &= ~SCTP_ADDR_REACHABLE; + net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY; + net->dest_state &= ~SCTP_ADDR_PF; + sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, + stcb, 0, + (void *)net, SCTP_SO_NOT_LOCKED); + } + } else if ((net->pf_threshold < net->failure_threshold) && + (net->error_count > net->pf_threshold)) { + if ((net->dest_state & SCTP_ADDR_PF) == 0) { + net->dest_state |= SCTP_ADDR_PF; + net->last_active = sctp_get_tick_count(); + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); + sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, + inp, stcb, net, + SCTP_FROM_SCTP_TIMER + SCTP_LOC_1); + sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); + } + } + } + if (stcb == NULL) + return (0); + + if (net) { + if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { + sctp_misc_ints(SCTP_THRESHOLD_INCR, + stcb->asoc.overall_error_count, + (stcb->asoc.overall_error_count+1), + SCTP_FROM_SCTP_TIMER, + __LINE__); + } + stcb->asoc.overall_error_count++; + } + } else { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) { + sctp_misc_ints(SCTP_THRESHOLD_INCR, + stcb->asoc.overall_error_count, + (stcb->asoc.overall_error_count+1), + SCTP_FROM_SCTP_TIMER, + __LINE__); + } + stcb->asoc.overall_error_count++; + } + SCTPDBG(SCTP_DEBUG_TIMER4, "Overall error count for %p now %d thresh:%u state:%x\n", + (void *)&stcb->asoc, stcb->asoc.overall_error_count, + (uint32_t)threshold, + ((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state)); + /* + * We specifically do not do >= to give the assoc one more change + * before we fail it. + */ + if (stcb->asoc.overall_error_count > threshold) { + /* Abort notification sends a ULP notify */ + struct mbuf *op_err; + + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + "Association error counter exceeded"); + inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_2; + sctp_abort_an_association(inp, stcb, op_err, true, SCTP_SO_NOT_LOCKED); + return (1); + } + return (0); +} + +/* + * sctp_find_alternate_net() returns a non-NULL pointer as long as there + * exists nets, which are not being deleted. + */ +struct sctp_nets * +sctp_find_alternate_net(struct sctp_tcb *stcb, + struct sctp_nets *net, + int mode) +{ + /* Find and return an alternate network if possible */ + struct sctp_nets *alt, *mnet, *min_errors_net = NULL , *max_cwnd_net = NULL; + bool looped; + /* JRS 5/14/07 - Initialize min_errors to an impossible value. */ + int min_errors = -1; + uint32_t max_cwnd = 0; + + if (stcb->asoc.numnets == 1) { + /* No selection can be made. */ + return (TAILQ_FIRST(&stcb->asoc.nets)); + } + /* + * JRS 5/14/07 - If mode is set to 2, use the CMT PF find alternate net algorithm. + * This algorithm chooses the active destination (not in PF state) with the largest + * cwnd value. If all destinations are in PF state, unreachable, or unconfirmed, choose + * the destination that is in PF state with the lowest error count. In case of a tie, + * choose the destination that was most recently active. + */ + if (mode == 2) { + TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { + /* JRS 5/14/07 - If the destination is unreachable or unconfirmed, skip it. */ + if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || + (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { + continue; + } + /* + * JRS 5/14/07 - If the destination is reachable but in PF state, compare + * the error count of the destination to the minimum error count seen thus far. + * Store the destination with the lower error count. If the error counts are + * equal, store the destination that was most recently active. + */ + if (mnet->dest_state & SCTP_ADDR_PF) { + /* + * JRS 5/14/07 - If the destination under consideration is the current + * destination, work as if the error count is one higher. The + * actual error count will not be incremented until later in the + * t3 handler. + */ + if (mnet == net) { + if (min_errors == -1) { + min_errors = mnet->error_count + 1; + min_errors_net = mnet; + } else if (mnet->error_count + 1 < min_errors) { + min_errors = mnet->error_count + 1; + min_errors_net = mnet; + } else if (mnet->error_count + 1 == min_errors + && mnet->last_active > min_errors_net->last_active) { + min_errors_net = mnet; + min_errors = mnet->error_count + 1; + } + continue; + } else { + if (min_errors == -1) { + min_errors = mnet->error_count; + min_errors_net = mnet; + } else if (mnet->error_count < min_errors) { + min_errors = mnet->error_count; + min_errors_net = mnet; + } else if (mnet->error_count == min_errors + && mnet->last_active > min_errors_net->last_active) { + min_errors_net = mnet; + min_errors = mnet->error_count; + } + continue; + } + } + /* + * JRS 5/14/07 - If the destination is reachable and not in PF state, compare the + * cwnd of the destination to the highest cwnd seen thus far. Store the + * destination with the higher cwnd value. If the cwnd values are equal, + * randomly choose one of the two destinations. + */ + if (max_cwnd < mnet->cwnd) { + max_cwnd_net = mnet; + max_cwnd = mnet->cwnd; + } else if (max_cwnd == mnet->cwnd) { + uint32_t rndval; + uint8_t this_random; + + if (stcb->asoc.hb_random_idx > 3) { + rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); + memcpy(stcb->asoc.hb_random_values, &rndval, sizeof(stcb->asoc.hb_random_values)); + this_random = stcb->asoc.hb_random_values[0]; + stcb->asoc.hb_random_idx++; + stcb->asoc.hb_ect_randombit = 0; + } else { + this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; + stcb->asoc.hb_random_idx++; + stcb->asoc.hb_ect_randombit = 0; + } + if (this_random % 2 == 1) { + max_cwnd_net = mnet; + max_cwnd = mnet->cwnd; /* Useless? */ + } + } + } + if (max_cwnd_net == NULL) { + if (min_errors_net == NULL) { + return (net); + } + return (min_errors_net); + } else { + return (max_cwnd_net); + } + } /* JRS 5/14/07 - If mode is set to 1, use the CMT policy for choosing an alternate net. */ + else if (mode == 1) { + TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) { + if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) || + (mnet->dest_state & SCTP_ADDR_UNCONFIRMED)) { + /* + * will skip ones that are not-reachable or + * unconfirmed + */ + continue; + } + if (max_cwnd < mnet->cwnd) { + max_cwnd_net = mnet; + max_cwnd = mnet->cwnd; + } else if (max_cwnd == mnet->cwnd) { + uint32_t rndval; + uint8_t this_random; + + if (stcb->asoc.hb_random_idx > 3) { + rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); + memcpy(stcb->asoc.hb_random_values, &rndval, + sizeof(stcb->asoc.hb_random_values)); + this_random = stcb->asoc.hb_random_values[0]; + stcb->asoc.hb_random_idx = 0; + stcb->asoc.hb_ect_randombit = 0; + } else { + this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx]; + stcb->asoc.hb_random_idx++; + stcb->asoc.hb_ect_randombit = 0; + } + if (this_random % 2) { + max_cwnd_net = mnet; + max_cwnd = mnet->cwnd; + } + } + } + if (max_cwnd_net) { + return (max_cwnd_net); + } + } + /* Look for an alternate net, which is active. */ + if ((net != NULL) && ((net->dest_state & SCTP_ADDR_BEING_DELETED) == 0)) { + alt = TAILQ_NEXT(net, sctp_next); + } else { + alt = TAILQ_FIRST(&stcb->asoc.nets); + } + looped = false; + for (;;) { + if (alt == NULL) { + if (!looped) { + alt = TAILQ_FIRST(&stcb->asoc.nets); + looped = true; + } + /* Definitely out of candidates. */ + if (alt == NULL) { + break; + } + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (alt->ro.ro_nh == NULL) { +#else + if (alt->ro.ro_rt == NULL) { +#endif + if (alt->ro._s_addr) { + sctp_free_ifa(alt->ro._s_addr); + alt->ro._s_addr = NULL; + } + alt->src_addr_selected = 0; + } + if (((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) && +#if defined(__FreeBSD__) && !defined(__Userspace__) + (alt->ro.ro_nh != NULL) && +#else + (alt->ro.ro_rt != NULL) && +#endif + ((alt->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) && + (alt != net)) { + /* Found an alternate net, which is reachable. */ + break; + } + alt = TAILQ_NEXT(alt, sctp_next); + } + + if (alt == NULL) { + /* + * In case no active alternate net has been found, look for + * an alternate net, which is confirmed. + */ + if ((net != NULL) && ((net->dest_state & SCTP_ADDR_BEING_DELETED) == 0)) { + alt = TAILQ_NEXT(net, sctp_next); + } else { + alt = TAILQ_FIRST(&stcb->asoc.nets); + } + looped = false; + for (;;) { + if (alt == NULL) { + if (!looped) { + alt = TAILQ_FIRST(&stcb->asoc.nets); + looped = true; + } + /* Definitely out of candidates. */ + if (alt == NULL) { + break; + } + } + if (((alt->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) && + (alt != net)) { + /* Found an alternate net, which is confirmed. */ + break; + } + alt = TAILQ_NEXT(alt, sctp_next); + } + } + if (alt == NULL) { + /* + * In case no confirmed alternate net has been found, just + * return net, if it is not being deleted. In the other case + * just return the first net. + */ + if ((net != NULL) && ((net->dest_state & SCTP_ADDR_BEING_DELETED) == 0)) { + alt = net; + } + if (alt == NULL) { + alt = TAILQ_FIRST(&stcb->asoc.nets); + } + } + return (alt); +} + +static void +sctp_backoff_on_timeout(struct sctp_tcb *stcb, + struct sctp_nets *net, + int win_probe, + int num_marked, int num_abandoned) +{ + if (net->RTO == 0) { + if (net->RTO_measured) { + net->RTO = stcb->asoc.minrto; + } else { + net->RTO = stcb->asoc.initial_rto; + } + } + net->RTO <<= 1; + if (net->RTO > stcb->asoc.maxrto) { + net->RTO = stcb->asoc.maxrto; + } + if ((win_probe == 0) && (num_marked || num_abandoned)) { + /* We don't apply penalty to window probe scenarios */ + /* JRS - Use the congestion control given in the CC module */ + stcb->asoc.cc_functions.sctp_cwnd_update_after_timeout(stcb, net); + } +} + +#ifndef INVARIANTS +static void +sctp_recover_sent_list(struct sctp_tcb *stcb) +{ + struct sctp_tmit_chunk *chk, *nchk; + struct sctp_association *asoc; + + asoc = &stcb->asoc; + TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { + if (SCTP_TSN_GE(asoc->last_acked_seq, chk->rec.data.tsn)) { + SCTP_PRINTF("Found chk:%p tsn:%x <= last_acked_seq:%x\n", + (void *)chk, chk->rec.data.tsn, asoc->last_acked_seq); + if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { + if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { + asoc->strmout[chk->rec.data.sid].chunks_on_queues--; + } + } + if ((asoc->strmout[chk->rec.data.sid].chunks_on_queues == 0) && + (asoc->strmout[chk->rec.data.sid].state == SCTP_STREAM_RESET_PENDING) && + TAILQ_EMPTY(&asoc->strmout[chk->rec.data.sid].outqueue)) { + asoc->trigger_reset = 1; + } + TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); + if (PR_SCTP_ENABLED(chk->flags)) { + if (asoc->pr_sctp_cnt != 0) + asoc->pr_sctp_cnt--; + } + if (chk->data) { + /*sa_ignore NO_NULL_CHK*/ + sctp_free_bufspace(stcb, asoc, chk, 1); + sctp_m_freem(chk->data); + chk->data = NULL; + if (asoc->prsctp_supported && PR_SCTP_BUF_ENABLED(chk->flags)) { + asoc->sent_queue_cnt_removeable--; + } + } + asoc->sent_queue_cnt--; + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + } + } + SCTP_PRINTF("after recover order is as follows\n"); + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { + SCTP_PRINTF("chk:%p TSN:%x\n", (void *)chk, chk->rec.data.tsn); + } +} +#endif + +static int +sctp_mark_all_for_resend(struct sctp_tcb *stcb, + struct sctp_nets *net, + struct sctp_nets *alt, + int window_probe, + int *num_marked, + int *num_abandoned) +{ + + /* + * Mark all chunks (well not all) that were sent to *net for + * retransmission. Move them to alt for there destination as well... + * We only mark chunks that have been outstanding long enough to + * have received feed-back. + */ + struct sctp_tmit_chunk *chk, *nchk; + struct sctp_nets *lnets; + struct timeval now, min_wait, tv; + int cur_rto; + int cnt_abandoned; + int audit_tf, num_mk, fir; + unsigned int cnt_mk; + uint32_t orig_flight, orig_tf; + uint32_t tsnlast, tsnfirst; +#ifndef INVARIANTS + int recovery_cnt = 0; +#endif + + /* none in flight now */ + audit_tf = 0; + fir = 0; + /* + * figure out how long a data chunk must be pending before we can + * mark it .. + */ + (void)SCTP_GETTIME_TIMEVAL(&now); + /* get cur rto in micro-seconds */ + cur_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv; + cur_rto *= 1000; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(cur_rto, + stcb->asoc.peers_rwnd, + window_probe, + SCTP_FR_T3_MARK_TIME); + sctp_log_fr(net->flight_size, 0, 0, SCTP_FR_CWND_REPORT); + sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT); + } + tv.tv_sec = cur_rto / 1000000; + tv.tv_usec = cur_rto % 1000000; +#if !(defined(__FreeBSD__) && !defined(__Userspace__)) + timersub(&now, &tv, &min_wait); +#else + min_wait = now; + timevalsub(&min_wait, &tv); +#endif + if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) { + /* + * if we hit here, we don't have enough seconds on the clock + * to account for the RTO. We just let the lower seconds be + * the bounds and don't worry about it. This may mean we + * will mark a lot more than we should. + */ + min_wait.tv_sec = min_wait.tv_usec = 0; + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(cur_rto, (uint32_t)now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME); + sctp_log_fr(0, (uint32_t)min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME); + } + /* + * Our rwnd will be incorrect here since we are not adding back the + * cnt * mbuf but we will fix that down below. + */ + orig_flight = net->flight_size; + orig_tf = stcb->asoc.total_flight; + + net->fast_retran_ip = 0; + /* Now on to each chunk */ + cnt_abandoned = 0; + num_mk = cnt_mk = 0; + tsnfirst = tsnlast = 0; +#ifndef INVARIANTS + start_again: +#endif + TAILQ_FOREACH_SAFE(chk, &stcb->asoc.sent_queue, sctp_next, nchk) { + if (SCTP_TSN_GE(stcb->asoc.last_acked_seq, chk->rec.data.tsn)) { + /* Strange case our list got out of order? */ + SCTP_PRINTF("Our list is out of order? last_acked:%x chk:%x\n", + (unsigned int)stcb->asoc.last_acked_seq, (unsigned int)chk->rec.data.tsn); +#ifdef INVARIANTS + panic("last acked >= chk on sent-Q"); +#else + recovery_cnt++; + SCTP_PRINTF("Recover attempts a restart cnt:%d\n", recovery_cnt); + sctp_recover_sent_list(stcb); + if (recovery_cnt < 10) { + goto start_again; + } else { + SCTP_PRINTF("Recovery fails %d times??\n", recovery_cnt); + } +#endif + } + if ((chk->whoTo == net) && (chk->sent < SCTP_DATAGRAM_ACKED)) { + /* + * found one to mark: If it is less than + * DATAGRAM_ACKED it MUST not be a skipped or marked + * TSN but instead one that is either already set + * for retransmission OR one that needs + * retransmission. + */ + + /* validate its been outstanding long enough */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(chk->rec.data.tsn, + (uint32_t)chk->sent_rcv_time.tv_sec, + chk->sent_rcv_time.tv_usec, + SCTP_FR_T3_MARK_TIME); + } + if ((chk->sent_rcv_time.tv_sec > min_wait.tv_sec) && (window_probe == 0)) { + /* + * we have reached a chunk that was sent + * some seconds past our min.. forget it we + * will find no more to send. + */ + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(0, + (uint32_t)chk->sent_rcv_time.tv_sec, + chk->sent_rcv_time.tv_usec, + SCTP_FR_T3_STOPPED); + } + continue; + } else if ((chk->sent_rcv_time.tv_sec == min_wait.tv_sec) && + (window_probe == 0)) { + /* + * we must look at the micro seconds to + * know. + */ + if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) { + /* + * ok it was sent after our boundary + * time. + */ + continue; + } + } + if (stcb->asoc.prsctp_supported && PR_SCTP_TTL_ENABLED(chk->flags)) { + /* Is it expired? */ +#if !(defined(__FreeBSD__) && !defined(__Userspace__)) + if (timercmp(&now, &chk->rec.data.timetodrop, >)) { +#else + if (timevalcmp(&now, &chk->rec.data.timetodrop, >)) { +#endif + /* Yes so drop it */ + if (chk->data) { + (void)sctp_release_pr_sctp_chunk(stcb, + chk, + 1, + SCTP_SO_NOT_LOCKED); + cnt_abandoned++; + } + continue; + } + } + if (stcb->asoc.prsctp_supported && PR_SCTP_RTX_ENABLED(chk->flags)) { + /* Has it been retransmitted tv_sec times? */ + if (chk->snd_count > chk->rec.data.timetodrop.tv_sec) { + if (chk->data) { + (void)sctp_release_pr_sctp_chunk(stcb, + chk, + 1, + SCTP_SO_NOT_LOCKED); + cnt_abandoned++; + } + continue; + } + } + if (chk->sent < SCTP_DATAGRAM_RESEND) { + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + num_mk++; + if (fir == 0) { + fir = 1; + tsnfirst = chk->rec.data.tsn; + } + tsnlast = chk->rec.data.tsn; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(chk->rec.data.tsn, chk->snd_count, + 0, SCTP_FR_T3_MARKED); + } + + if (chk->rec.data.chunk_was_revoked) { + /* deflate the cwnd */ + chk->whoTo->cwnd -= chk->book_size; + chk->rec.data.chunk_was_revoked = 0; + } + net->marked_retrans++; + stcb->asoc.marked_retrans++; + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { + sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_RSND_TO, + chk->whoTo->flight_size, + chk->book_size, + (uint32_t)(uintptr_t)chk->whoTo, + chk->rec.data.tsn); + } + sctp_flight_size_decrease(chk); + sctp_total_flight_decrease(stcb, chk); + stcb->asoc.peers_rwnd += chk->send_size; + stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh); + } + chk->sent = SCTP_DATAGRAM_RESEND; + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + SCTP_STAT_INCR(sctps_markedretrans); + + /* reset the TSN for striking and other FR stuff */ + chk->rec.data.doing_fast_retransmit = 0; + /* Clear any time so NO RTT is being done */ + + if (chk->do_rtt) { + if (chk->whoTo->rto_needed == 0) { + chk->whoTo->rto_needed = 1; + } + } + chk->do_rtt = 0; + if (alt != net) { + sctp_free_remote_addr(chk->whoTo); + chk->no_fr_allowed = 1; + chk->whoTo = alt; + atomic_add_int(&alt->ref_count, 1); + } else { + chk->no_fr_allowed = 0; + if (TAILQ_EMPTY(&stcb->asoc.send_queue)) { + chk->rec.data.fast_retran_tsn = stcb->asoc.sending_seq; + } else { + chk->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn; + } + } + /* CMT: Do not allow FRs on retransmitted TSNs. + */ + if (stcb->asoc.sctp_cmt_on_off > 0) { + chk->no_fr_allowed = 1; + } +#ifdef THIS_SHOULD_NOT_BE_DONE + } else if (chk->sent == SCTP_DATAGRAM_ACKED) { + /* remember highest acked one */ + could_be_sent = chk; +#endif + } + if (chk->sent == SCTP_DATAGRAM_RESEND) { + cnt_mk++; + } + } + if ((orig_flight - net->flight_size) != (orig_tf - stcb->asoc.total_flight)) { + /* we did not subtract the same things? */ + audit_tf = 1; + } + + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT); + } +#ifdef SCTP_DEBUG + if (num_mk) { + SCTPDBG(SCTP_DEBUG_TIMER1, "LAST TSN marked was %x\n", + tsnlast); + SCTPDBG(SCTP_DEBUG_TIMER1, "Num marked for retransmission was %d peer-rwd:%u\n", + num_mk, + stcb->asoc.peers_rwnd); + } +#endif + *num_marked = num_mk; + *num_abandoned = cnt_abandoned; + /* Now check for a ECN Echo that may be stranded And + * include the cnt_mk'd to have all resends in the + * control queue. + */ + TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { + if (chk->sent == SCTP_DATAGRAM_RESEND) { + cnt_mk++; + } + if ((chk->whoTo == net) && + (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { + sctp_free_remote_addr(chk->whoTo); + chk->whoTo = alt; + if (chk->sent != SCTP_DATAGRAM_RESEND) { + chk->sent = SCTP_DATAGRAM_RESEND; + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + cnt_mk++; + } + atomic_add_int(&alt->ref_count, 1); + } + } +#ifdef THIS_SHOULD_NOT_BE_DONE + if ((stcb->asoc.sent_queue_retran_cnt == 0) && (could_be_sent)) { + /* fix it so we retransmit the highest acked anyway */ + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + cnt_mk++; + could_be_sent->sent = SCTP_DATAGRAM_RESEND; + } +#endif + if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) { +#ifdef INVARIANTS + SCTP_PRINTF("Local Audit says there are %d for retran asoc cnt:%d we marked:%d this time\n", + cnt_mk, stcb->asoc.sent_queue_retran_cnt, num_mk); +#endif +#ifndef SCTP_AUDITING_ENABLED + stcb->asoc.sent_queue_retran_cnt = cnt_mk; +#endif + } + if (audit_tf) { + SCTPDBG(SCTP_DEBUG_TIMER4, + "Audit total flight due to negative value net:%p\n", + (void *)net); + stcb->asoc.total_flight = 0; + stcb->asoc.total_flight_count = 0; + /* Clear all networks flight size */ + TAILQ_FOREACH(lnets, &stcb->asoc.nets, sctp_next) { + lnets->flight_size = 0; + SCTPDBG(SCTP_DEBUG_TIMER4, + "Net:%p c-f cwnd:%d ssthresh:%d\n", + (void *)lnets, lnets->cwnd, lnets->ssthresh); + } + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->sent < SCTP_DATAGRAM_RESEND) { + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { + sctp_misc_ints(SCTP_FLIGHT_LOG_UP, + chk->whoTo->flight_size, + chk->book_size, + (uint32_t)(uintptr_t)chk->whoTo, + chk->rec.data.tsn); + } + + sctp_flight_size_increase(chk); + sctp_total_flight_increase(stcb, chk); + } + } + } + /* We return 1 if we only have a window probe outstanding */ + return (0); +} + +int +sctp_t3rxt_timer(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + struct sctp_nets *alt; + int win_probe, num_mk, num_abandoned; + + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FR_LOGGING_ENABLE) { + sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT); + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { + struct sctp_nets *lnet; + + TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) { + if (net == lnet) { + sctp_log_cwnd(stcb, lnet, 1, SCTP_CWND_LOG_FROM_T3); + } else { + sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_LOG_FROM_T3); + } + } + } + /* Find an alternate and mark those for retransmission */ + if ((stcb->asoc.peers_rwnd == 0) && + (stcb->asoc.total_flight < net->mtu)) { + SCTP_STAT_INCR(sctps_timowindowprobe); + win_probe = 1; + } else { + win_probe = 0; + } + + if (win_probe == 0) { + /* We don't do normal threshold management on window probes */ + if (sctp_threshold_management(inp, stcb, net, + stcb->asoc.max_send_times)) { + /* Association was destroyed */ + return (1); + } else { + if (net != stcb->asoc.primary_destination) { + /* send a immediate HB if our RTO is stale */ + struct timeval now; + uint32_t ms_goneby; + + (void)SCTP_GETTIME_TIMEVAL(&now); + if (net->last_sent_time.tv_sec) { + ms_goneby = (uint32_t)(now.tv_sec - net->last_sent_time.tv_sec) * 1000; + } else { + ms_goneby = 0; + } + if ((net->dest_state & SCTP_ADDR_PF) == 0) { + if ((ms_goneby > net->RTO) || (net->RTO == 0)) { + /* + * no recent feed back in an RTO or + * more, request a RTT update + */ + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); + } + } + } + } + } else { + /* + * For a window probe we don't penalize the net's but only + * the association. This may fail it if SACKs are not coming + * back. If sack's are coming with rwnd locked at 0, we will + * continue to hold things waiting for rwnd to raise + */ + if (sctp_threshold_management(inp, stcb, NULL, + stcb->asoc.max_send_times)) { + /* Association was destroyed */ + return (1); + } + } + if (stcb->asoc.sctp_cmt_on_off > 0) { + if (net->pf_threshold < net->failure_threshold) { + alt = sctp_find_alternate_net(stcb, net, 2); + } else { + /* + * CMT: Using RTX_SSTHRESH policy for CMT. + * If CMT is being used, then pick dest with + * largest ssthresh for any retransmission. + */ + alt = sctp_find_alternate_net(stcb, net, 1); + /* + * CUCv2: If a different dest is picked for + * the retransmission, then new + * (rtx-)pseudo_cumack needs to be tracked + * for orig dest. Let CUCv2 track new (rtx-) + * pseudo-cumack always. + */ + net->find_pseudo_cumack = 1; + net->find_rtx_pseudo_cumack = 1; + } + } else { + alt = sctp_find_alternate_net(stcb, net, 0); + } + + num_mk = 0; + num_abandoned = 0; + (void)sctp_mark_all_for_resend(stcb, net, alt, win_probe, + &num_mk, &num_abandoned); + /* FR Loss recovery just ended with the T3. */ + stcb->asoc.fast_retran_loss_recovery = 0; + + /* CMT FR loss recovery ended with the T3 */ + net->fast_retran_loss_recovery = 0; + if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && + (net->flight_size == 0)) { + (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins)(stcb, net); + } + + /* + * setup the sat loss recovery that prevents satellite cwnd advance. + */ + stcb->asoc.sat_t3_loss_recovery = 1; + stcb->asoc.sat_t3_recovery_tsn = stcb->asoc.sending_seq; + + /* Backoff the timer and cwnd */ + sctp_backoff_on_timeout(stcb, net, win_probe, num_mk, num_abandoned); + if (((net->dest_state & SCTP_ADDR_REACHABLE) == 0) || + (net->dest_state & SCTP_ADDR_PF)) { + /* Move all pending over too */ + sctp_move_chunks_from_net(stcb, net); + + /* Get the address that failed, to + * force a new src address selection and + * a route allocation. + */ + if (net->ro._s_addr != NULL) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + } + net->src_addr_selected = 0; + + /* Force a route allocation too */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + RO_NHFREE(&net->ro); +#else + if (net->ro.ro_rt != NULL) { + RTFREE(net->ro.ro_rt); + net->ro.ro_rt = NULL; + } +#endif + + /* Was it our primary? */ + if ((stcb->asoc.primary_destination == net) && (alt != net)) { + /* + * Yes, note it as such and find an alternate note: + * this means HB code must use this to resent the + * primary if it goes active AND if someone does a + * change-primary then this flag must be cleared + * from any net structures. + */ + if (stcb->asoc.alternate != NULL) { + sctp_free_remote_addr(stcb->asoc.alternate); + } + stcb->asoc.alternate = alt; + atomic_add_int(&stcb->asoc.alternate->ref_count, 1); + } + } + /* + * Special case for cookie-echo'ed case, we don't do output but must + * await the COOKIE-ACK before retransmission + */ + if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) { + /* + * Here we just reset the timer and start again since we + * have not established the asoc + */ + sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); + return (0); + } + if (stcb->asoc.prsctp_supported) { + struct sctp_tmit_chunk *lchk; + + lchk = sctp_try_advance_peer_ack_point(stcb, &stcb->asoc); + /* C3. See if we need to send a Fwd-TSN */ + if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { + send_forward_tsn(stcb, &stcb->asoc); + for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) { + if (lchk->whoTo != NULL) { + break; + } + } + if (lchk != NULL) { + /* Assure a timer is up */ + sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); + } + } + } + if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_MONITOR_ENABLE) { + sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX); + } + return (0); +} + +int +sctp_t1init_timer(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + /* bump the thresholds */ + if (stcb->asoc.delayed_connection) { + /* + * special hook for delayed connection. The library did NOT + * complete the rest of its sends. + */ + stcb->asoc.delayed_connection = 0; + sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); + return (0); + } + if (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) { + return (0); + } + if (sctp_threshold_management(inp, stcb, net, + stcb->asoc.max_init_times)) { + /* Association was destroyed */ + return (1); + } + stcb->asoc.dropped_special_cnt = 0; + sctp_backoff_on_timeout(stcb, stcb->asoc.primary_destination, 1, 0, 0); + if (stcb->asoc.initial_init_rto_max < net->RTO) { + net->RTO = stcb->asoc.initial_init_rto_max; + } + if (stcb->asoc.numnets > 1) { + /* If we have more than one addr use it */ + struct sctp_nets *alt; + + alt = sctp_find_alternate_net(stcb, stcb->asoc.primary_destination, 0); + if (alt != stcb->asoc.primary_destination) { + sctp_move_chunks_from_net(stcb, stcb->asoc.primary_destination); + stcb->asoc.primary_destination = alt; + } + } + /* Send out a new init */ + sctp_send_initiate(inp, stcb, SCTP_SO_NOT_LOCKED); + return (0); +} + +/* + * For cookie and asconf we actually need to find and mark for resend, then + * increment the resend counter (after all the threshold management stuff of + * course). + */ +int +sctp_cookie_timer(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_nets *net SCTP_UNUSED) +{ + struct sctp_nets *alt; + struct sctp_tmit_chunk *cookie; + + /* first before all else we must find the cookie */ + TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue, sctp_next) { + if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) { + break; + } + } + if (cookie == NULL) { + if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) { + /* FOOBAR! */ + struct mbuf *op_err; + + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + "Cookie timer expired, but no cookie"); + inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3; + sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED); + } else { +#ifdef INVARIANTS + panic("Cookie timer expires in wrong state?"); +#else + SCTP_PRINTF("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(stcb)); + return (0); +#endif + } + return (0); + } + /* Ok we found the cookie, threshold management next */ + if (sctp_threshold_management(inp, stcb, cookie->whoTo, + stcb->asoc.max_init_times)) { + /* Assoc is over */ + return (1); + } + /* + * Cleared threshold management, now lets backoff the address + * and select an alternate + */ + stcb->asoc.dropped_special_cnt = 0; + sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 0, 0); + alt = sctp_find_alternate_net(stcb, cookie->whoTo, 0); + if (alt != cookie->whoTo) { + sctp_free_remote_addr(cookie->whoTo); + cookie->whoTo = alt; + atomic_add_int(&alt->ref_count, 1); + } + /* Now mark the retran info */ + if (cookie->sent != SCTP_DATAGRAM_RESEND) { + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + } + cookie->sent = SCTP_DATAGRAM_RESEND; + cookie->flags |= CHUNK_FLAGS_FRAGMENT_OK; + /* + * Now call the output routine to kick out the cookie again, Note we + * don't mark any chunks for retran so that FR will need to kick in + * to move these (or a send timer). + */ + return (0); +} + +int +sctp_strreset_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb) +{ + struct sctp_nets *alt, *net; + struct sctp_tmit_chunk *strrst = NULL, *chk = NULL; + + if (stcb->asoc.stream_reset_outstanding == 0) { + return (0); + } + /* find the existing STRRESET, we use the seq number we sent out on */ + (void)sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst); + if (strrst == NULL) { + return (0); + } + net = strrst->whoTo; + /* do threshold management */ + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { + /* Assoc is over */ + return (1); + } + /* + * Cleared threshold management, now lets backoff the address + * and select an alternate + */ + sctp_backoff_on_timeout(stcb, net, 1, 0, 0); + alt = sctp_find_alternate_net(stcb, net, 0); + strrst->whoTo = alt; + atomic_add_int(&alt->ref_count, 1); + + /* See if a ECN Echo is also stranded */ + TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { + if ((chk->whoTo == net) && + (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { + sctp_free_remote_addr(chk->whoTo); + if (chk->sent != SCTP_DATAGRAM_RESEND) { + chk->sent = SCTP_DATAGRAM_RESEND; + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + } + chk->whoTo = alt; + atomic_add_int(&alt->ref_count, 1); + } + } + if ((net->dest_state & SCTP_ADDR_REACHABLE) == 0) { + /* + * If the address went un-reachable, we need to move to + * alternates for ALL chk's in queue + */ + sctp_move_chunks_from_net(stcb, net); + } + sctp_free_remote_addr(net); + + /* mark the retran info */ + if (strrst->sent != SCTP_DATAGRAM_RESEND) + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + strrst->sent = SCTP_DATAGRAM_RESEND; + strrst->flags |= CHUNK_FLAGS_FRAGMENT_OK; + + /* restart the timer */ + sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, alt); + return (0); +} + +int +sctp_asconf_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + struct sctp_nets *alt; + struct sctp_tmit_chunk *asconf, *chk; + + /* is this a first send, or a retransmission? */ + if (TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) { + /* compose a new ASCONF chunk and send it */ + sctp_send_asconf(stcb, net, SCTP_ADDR_NOT_LOCKED); + } else { + /* + * Retransmission of the existing ASCONF is needed + */ + + /* find the existing ASCONF */ + asconf = TAILQ_FIRST(&stcb->asoc.asconf_send_queue); + if (asconf == NULL) { + return (0); + } + net = asconf->whoTo; + /* do threshold management */ + if (sctp_threshold_management(inp, stcb, net, + stcb->asoc.max_send_times)) { + /* Assoc is over */ + return (1); + } + if (asconf->snd_count > stcb->asoc.max_send_times) { + /* + * Something is rotten: our peer is not responding to + * ASCONFs but apparently is to other chunks. i.e. it + * is not properly handling the chunk type upper bits. + * Mark this peer as ASCONF incapable and cleanup. + */ + SCTPDBG(SCTP_DEBUG_TIMER1, "asconf_timer: Peer has not responded to our repeated ASCONFs\n"); + sctp_asconf_cleanup(stcb); + return (0); + } + /* + * cleared threshold management, so now backoff the net and + * select an alternate + */ + sctp_backoff_on_timeout(stcb, net, 1, 0, 0); + alt = sctp_find_alternate_net(stcb, net, 0); + if (asconf->whoTo != alt) { + asconf->whoTo = alt; + atomic_add_int(&alt->ref_count, 1); + } + + /* See if an ECN Echo is also stranded */ + TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) { + if ((chk->whoTo == net) && + (chk->rec.chunk_id.id == SCTP_ECN_ECHO)) { + sctp_free_remote_addr(chk->whoTo); + chk->whoTo = alt; + if (chk->sent != SCTP_DATAGRAM_RESEND) { + chk->sent = SCTP_DATAGRAM_RESEND; + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + } + atomic_add_int(&alt->ref_count, 1); + } + } + TAILQ_FOREACH(chk, &stcb->asoc.asconf_send_queue, sctp_next) { + if (chk->whoTo != alt) { + sctp_free_remote_addr(chk->whoTo); + chk->whoTo = alt; + atomic_add_int(&alt->ref_count, 1); + } + if (asconf->sent != SCTP_DATAGRAM_RESEND && chk->sent != SCTP_DATAGRAM_UNSENT) + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + chk->sent = SCTP_DATAGRAM_RESEND; + chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; + } + if ((net->dest_state & SCTP_ADDR_REACHABLE) == 0) { + /* + * If the address went un-reachable, we need to move + * to the alternate for ALL chunks in queue + */ + sctp_move_chunks_from_net(stcb, net); + } + sctp_free_remote_addr(net); + + /* mark the retran info */ + if (asconf->sent != SCTP_DATAGRAM_RESEND) + sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt); + asconf->sent = SCTP_DATAGRAM_RESEND; + asconf->flags |= CHUNK_FLAGS_FRAGMENT_OK; + + /* send another ASCONF if any and we can do */ + sctp_send_asconf(stcb, alt, SCTP_ADDR_NOT_LOCKED); + } + return (0); +} + +/* Mobility adaptation */ +void +sctp_delete_prim_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb) +{ + if (stcb->asoc.deleted_primary == NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: deleted_primary is not stored...\n"); + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); + return; + } + SCTPDBG(SCTP_DEBUG_ASCONF1, "delete_prim_timer: finished to keep deleted primary "); + SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, &stcb->asoc.deleted_primary->ro._l_addr.sa); + sctp_free_remote_addr(stcb->asoc.deleted_primary); + stcb->asoc.deleted_primary = NULL; + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); + return; +} + +/* + * For the shutdown and shutdown-ack, we do not keep one around on the + * control queue. This means we must generate a new one and call the general + * chunk output routine, AFTER having done threshold management. + * It is assumed that net is non-NULL. + */ +int +sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + struct sctp_nets *alt; + + /* first threshold management */ + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { + /* Assoc is over */ + return (1); + } + sctp_backoff_on_timeout(stcb, net, 1, 0, 0); + /* second select an alternative */ + alt = sctp_find_alternate_net(stcb, net, 0); + + /* third generate a shutdown into the queue for out net */ + sctp_send_shutdown(stcb, alt); + + /* fourth restart timer */ + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, alt); + return (0); +} + +int +sctp_shutdownack_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + struct sctp_nets *alt; + + /* first threshold management */ + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { + /* Assoc is over */ + return (1); + } + sctp_backoff_on_timeout(stcb, net, 1, 0, 0); + /* second select an alternative */ + alt = sctp_find_alternate_net(stcb, net, 0); + + /* third generate a shutdown into the queue for out net */ + sctp_send_shutdown_ack(stcb, alt); + + /* fourth restart timer */ + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, alt); + return (0); +} + +static void +sctp_audit_stream_queues_for_size(struct sctp_inpcb *inp, struct sctp_tcb *stcb) +{ + struct sctp_stream_queue_pending *sp; + unsigned int i, chks_in_queue = 0; + int being_filled = 0; + + KASSERT(inp != NULL, ("inp is NULL")); + KASSERT(stcb != NULL, ("stcb is NULL")); + SCTP_TCB_LOCK_ASSERT(stcb); + KASSERT(TAILQ_EMPTY(&stcb->asoc.send_queue), ("send_queue not empty")); + KASSERT(TAILQ_EMPTY(&stcb->asoc.sent_queue), ("sent_queue not empty")); + + if (stcb->asoc.sent_queue_retran_cnt) { + SCTP_PRINTF("Hmm, sent_queue_retran_cnt is non-zero %d\n", + stcb->asoc.sent_queue_retran_cnt); + stcb->asoc.sent_queue_retran_cnt = 0; + } + if (stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { + /* No stream scheduler information, initialize scheduler */ + stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc); + if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, &stcb->asoc)) { + /* yep, we lost a stream or two */ + SCTP_PRINTF("Found additional streams NOT managed by scheduler, corrected\n"); + } else { + /* no streams lost */ + stcb->asoc.total_output_queue_size = 0; + } + } + /* Check to see if some data queued, if so report it */ + for (i = 0; i < stcb->asoc.streamoutcnt; i++) { + if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { + TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { + if (sp->msg_is_complete) + being_filled++; + chks_in_queue++; + } + } + } + if (chks_in_queue != stcb->asoc.stream_queue_cnt) { + SCTP_PRINTF("Hmm, stream queue cnt at %d I counted %d in stream out wheel\n", + stcb->asoc.stream_queue_cnt, chks_in_queue); + } + if (chks_in_queue) { + /* call the output queue function */ + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED); + if ((TAILQ_EMPTY(&stcb->asoc.send_queue)) && + (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { + /* + * Probably should go in and make it go back through + * and add fragments allowed + */ + if (being_filled == 0) { + SCTP_PRINTF("Still nothing moved %d chunks are stuck\n", + chks_in_queue); + } + } + } else { + SCTP_PRINTF("Found no chunks on any queue tot:%lu\n", + (u_long)stcb->asoc.total_output_queue_size); + stcb->asoc.total_output_queue_size = 0; + } +} + +int +sctp_heartbeat_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + bool net_was_pf; + + net_was_pf = (net->dest_state & SCTP_ADDR_PF) != 0; + if (net->hb_responded == 0) { + if (net->ro._s_addr != NULL) { + /* Invalidate the src address if we did not get + * a response last time. + */ + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + } + sctp_backoff_on_timeout(stcb, net, 1, 0, 0); + if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) { + /* Assoc is over */ + return (1); + } + } + /* Zero PBA, if it needs it */ + if (net->partial_bytes_acked > 0) { + net->partial_bytes_acked = 0; + } + if ((stcb->asoc.total_output_queue_size > 0) && + (TAILQ_EMPTY(&stcb->asoc.send_queue)) && + (TAILQ_EMPTY(&stcb->asoc.sent_queue))) { + sctp_audit_stream_queues_for_size(inp, stcb); + } + if ((((net->dest_state & SCTP_ADDR_NOHB) == 0) || + (net->dest_state & SCTP_ADDR_UNCONFIRMED)) && + (net_was_pf || ((net->dest_state & SCTP_ADDR_PF) == 0))) { + /* When moving to PF during threshold management, a HB has been + queued in that routine. */ + uint32_t ms_gone_by; + + if ((net->last_sent_time.tv_sec > 0) || + (net->last_sent_time.tv_usec > 0)) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct timeval diff; + + SCTP_GETTIME_TIMEVAL(&diff); + timevalsub(&diff, &net->last_sent_time); +#else + struct timeval diff, now; + + SCTP_GETTIME_TIMEVAL(&now); + timersub(&now, &net->last_sent_time, &diff); +#endif + ms_gone_by = (uint32_t)(diff.tv_sec * 1000) + + (uint32_t)(diff.tv_usec / 1000); + } else { + ms_gone_by = 0xffffffff; + } + if ((ms_gone_by >= net->heart_beat_delay) || + (net->dest_state & SCTP_ADDR_UNCONFIRMED) || + (net->dest_state & SCTP_ADDR_PF)) { + sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED); + } + } + return (0); +} + +void +sctp_pathmtu_timer(struct sctp_inpcb *inp, + struct sctp_tcb *stcb, + struct sctp_nets *net) +{ + uint32_t next_mtu, mtu; + + next_mtu = sctp_get_next_mtu(net->mtu); + + if ((next_mtu > net->mtu) && (net->port == 0)) { + if ((net->src_addr_selected == 0) || + (net->ro._s_addr == NULL) || + (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { + if ((net->ro._s_addr != NULL) && (net->ro._s_addr->localifa_flags & SCTP_BEING_DELETED)) { + sctp_free_ifa(net->ro._s_addr); + net->ro._s_addr = NULL; + net->src_addr_selected = 0; + } else if (net->ro._s_addr == NULL) { +#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) + if (net->ro._l_addr.sa.sa_family == AF_INET6) { + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; + /* KAME hack: embed scopeid */ +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + (void)in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL); +#else + (void)in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL); +#endif +#elif defined(SCTP_KAME) + (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); +#else + (void)in6_embedscope(&sin6->sin6_addr, sin6); +#endif + } +#endif + + net->ro._s_addr = sctp_source_address_selection(inp, + stcb, + (sctp_route_t *)&net->ro, + net, 0, stcb->asoc.vrf_id); +#if defined(INET6) && defined(SCTP_EMBEDDED_V6_SCOPE) + if (net->ro._l_addr.sa.sa_family == AF_INET6) { + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; +#ifdef SCTP_KAME + (void)sa6_recoverscope(sin6); +#else + (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL); +#endif /* SCTP_KAME */ + } +#endif /* INET6 */ + } + if (net->ro._s_addr) + net->src_addr_selected = 1; + } + if (net->ro._s_addr) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_nh); +#else + mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._s_addr.sa, net->ro.ro_rt); +#endif +#if defined(INET) || defined(INET6) + if (net->port) { + mtu -= sizeof(struct udphdr); + } +#endif + if (mtu > next_mtu) { + net->mtu = next_mtu; + } else { + net->mtu = mtu; + } + } + } + /* restart the timer */ + sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); +} + +void +sctp_autoclose_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb) +{ + struct timeval tn, *tim_touse; + struct sctp_association *asoc; + uint32_t ticks_gone_by; + + (void)SCTP_GETTIME_TIMEVAL(&tn); + if (stcb->asoc.sctp_autoclose_ticks > 0 && + sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { + /* Auto close is on */ + asoc = &stcb->asoc; + /* pick the time to use */ + if (asoc->time_last_rcvd.tv_sec > + asoc->time_last_sent.tv_sec) { + tim_touse = &asoc->time_last_rcvd; + } else { + tim_touse = &asoc->time_last_sent; + } + /* Now has long enough transpired to autoclose? */ + ticks_gone_by = sctp_secs_to_ticks((uint32_t)(tn.tv_sec - tim_touse->tv_sec)); + if (ticks_gone_by >= asoc->sctp_autoclose_ticks) { + /* + * autoclose time has hit, call the output routine, + * which should do nothing just to be SURE we don't + * have hanging data. We can then safely check the + * queues and know that we are clear to send + * shutdown + */ + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED); + /* Are we clean? */ + if (TAILQ_EMPTY(&asoc->send_queue) && + TAILQ_EMPTY(&asoc->sent_queue)) { + /* + * there is nothing queued to send, so I'm + * done... + */ + if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) { + /* only send SHUTDOWN 1st time thru */ + struct sctp_nets *net; + + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); + sctp_stop_timers_for_shutdown(stcb); + if (stcb->asoc.alternate) { + net = stcb->asoc.alternate; + } else { + net = stcb->asoc.primary_destination; + } + sctp_send_shutdown(stcb, net); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, + stcb->sctp_ep, stcb, net); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, + stcb->sctp_ep, stcb, NULL); + } + } + } else { + /* + * No auto close at this time, reset t-o to check + * later + */ + uint32_t tmp; + + /* fool the timer startup to use the time left */ + tmp = asoc->sctp_autoclose_ticks; + asoc->sctp_autoclose_ticks -= ticks_gone_by; + sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL); + /* restore the real tick value */ + asoc->sctp_autoclose_ticks = tmp; + } + } +} + |