93164cf98c
- Finally all splxx() are removed - Count error fixed in mapping array which might cause a wrong cumack generation. - Invariants around panic for case D + printf when no invariants. - one-to-one model race condition fixed by using a pre-formed connection and then completing the work so accept won't happen on a non-formed association. - Some additional paranoia checks in sctp_output. - Locks that were missing in the accept code. Approved by: gnn
1712 lines
47 KiB
C
1712 lines
47 KiB
C
/*-
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* Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $KAME: sctp_timer.c,v 1.29 2005/03/06 16:04:18 itojun Exp $ */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define _IP_VHL
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#include <netinet/sctp_os.h>
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#include <netinet/sctp_pcb.h>
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#ifdef INET6
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#include <netinet6/sctp6_var.h>
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#endif
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_timer.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_output.h>
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#include <netinet/sctp_header.h>
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#include <netinet/sctp_indata.h>
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#include <netinet/sctp_asconf.h>
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#include <netinet/sctp_input.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_uio.h>
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#ifdef SCTP_DEBUG
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extern uint32_t sctp_debug_on;
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#endif /* SCTP_DEBUG */
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extern unsigned int sctp_early_fr_msec;
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void
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sctp_early_fr_timer(struct sctp_inpcb *inp,
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struct sctp_tcb *stcb,
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struct sctp_nets *net)
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{
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struct sctp_tmit_chunk *chk, *tp2;
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struct timeval now, min_wait, tv;
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unsigned int cur_rtt, cnt = 0, cnt_resend = 0;
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/* an early FR is occuring. */
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SCTP_GETTIME_TIMEVAL(&now);
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/* get cur rto in micro-seconds */
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if (net->lastsa == 0) {
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/* Hmm no rtt estimate yet? */
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cur_rtt = stcb->asoc.initial_rto >> 2;
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} else {
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cur_rtt = ((net->lastsa >> 2) + net->lastsv) >> 1;
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}
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if (cur_rtt < sctp_early_fr_msec) {
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cur_rtt = sctp_early_fr_msec;
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}
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cur_rtt *= 1000;
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tv.tv_sec = cur_rtt / 1000000;
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tv.tv_usec = cur_rtt % 1000000;
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min_wait = now;
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timevalsub(&min_wait, &tv);
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if (min_wait.tv_sec < 0 || min_wait.tv_usec < 0) {
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/*
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* if we hit here, we don't have enough seconds on the clock
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* to account for the RTO. We just let the lower seconds be
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* the bounds and don't worry about it. This may mean we
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* will mark a lot more than we should.
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*/
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min_wait.tv_sec = min_wait.tv_usec = 0;
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}
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chk = TAILQ_LAST(&stcb->asoc.sent_queue, sctpchunk_listhead);
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for (; chk != NULL; chk = tp2) {
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tp2 = TAILQ_PREV(chk, sctpchunk_listhead, sctp_next);
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if (chk->whoTo != net) {
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continue;
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}
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if (chk->sent == SCTP_DATAGRAM_RESEND)
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cnt_resend++;
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else if ((chk->sent > SCTP_DATAGRAM_UNSENT) &&
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(chk->sent < SCTP_DATAGRAM_RESEND)) {
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/* pending, may need retran */
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if (chk->sent_rcv_time.tv_sec > min_wait.tv_sec) {
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/*
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* we have reached a chunk that was sent
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* some seconds past our min.. forget it we
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* will find no more to send.
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*/
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continue;
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} else if (chk->sent_rcv_time.tv_sec == min_wait.tv_sec) {
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/*
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* we must look at the micro seconds to
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* know.
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*/
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if (chk->sent_rcv_time.tv_usec >= min_wait.tv_usec) {
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/*
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* ok it was sent after our boundary
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* time.
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*/
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continue;
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}
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}
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#ifdef SCTP_EARLYFR_LOGGING
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sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count,
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4, SCTP_FR_MARKED_EARLY);
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#endif
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SCTP_STAT_INCR(sctps_earlyfrmrkretrans);
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chk->sent = SCTP_DATAGRAM_RESEND;
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sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
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/* double book size since we are doing an early FR */
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chk->book_size_scale++;
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cnt += chk->send_size;
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if ((cnt + net->flight_size) > net->cwnd) {
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/* Mark all we could possibly resend */
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break;
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}
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}
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}
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if (cnt) {
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#ifdef SCTP_CWND_MONITOR
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int old_cwnd;
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old_cwnd = net->cwnd;
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#endif
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sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_EARLY_FR_TMR);
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/*
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* make a small adjustment to cwnd and force to CA.
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*/
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if (net->cwnd > net->mtu)
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/* drop down one MTU after sending */
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net->cwnd -= net->mtu;
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if (net->cwnd < net->ssthresh)
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/* still in SS move to CA */
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net->ssthresh = net->cwnd - 1;
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#ifdef SCTP_CWND_MONITOR
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sctp_log_cwnd(stcb, net, (old_cwnd - net->cwnd), SCTP_CWND_LOG_FROM_FR);
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#endif
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} else if (cnt_resend) {
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sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_EARLY_FR_TMR);
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}
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/* Restart it? */
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if (net->flight_size < net->cwnd) {
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SCTP_STAT_INCR(sctps_earlyfrstrtmr);
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sctp_timer_start(SCTP_TIMER_TYPE_EARLYFR, stcb->sctp_ep, stcb, net);
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}
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}
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void
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sctp_audit_retranmission_queue(struct sctp_association *asoc)
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{
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struct sctp_tmit_chunk *chk;
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#ifdef SCTP_DEBUG
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if (sctp_debug_on & SCTP_DEBUG_TIMER4) {
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printf("Audit invoked on send queue cnt:%d onqueue:%d\n",
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asoc->sent_queue_retran_cnt,
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asoc->sent_queue_cnt);
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}
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#endif /* SCTP_DEBUG */
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asoc->sent_queue_retran_cnt = 0;
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asoc->sent_queue_cnt = 0;
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TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
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if (chk->sent == SCTP_DATAGRAM_RESEND) {
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sctp_ucount_incr(asoc->sent_queue_retran_cnt);
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}
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asoc->sent_queue_cnt++;
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}
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TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
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if (chk->sent == SCTP_DATAGRAM_RESEND) {
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sctp_ucount_incr(asoc->sent_queue_retran_cnt);
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}
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}
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#ifdef SCTP_DEBUG
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if (sctp_debug_on & SCTP_DEBUG_TIMER4) {
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printf("Audit completes retran:%d onqueue:%d\n",
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asoc->sent_queue_retran_cnt,
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asoc->sent_queue_cnt);
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}
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#endif /* SCTP_DEBUG */
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}
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int
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sctp_threshold_management(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
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struct sctp_nets *net, uint16_t threshold)
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{
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if (net) {
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net->error_count++;
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#ifdef SCTP_DEBUG
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if (sctp_debug_on & SCTP_DEBUG_TIMER4) {
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printf("Error count for %p now %d thresh:%d\n",
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net, net->error_count,
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net->failure_threshold);
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}
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#endif /* SCTP_DEBUG */
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if (net->error_count > net->failure_threshold) {
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/* We had a threshold failure */
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if (net->dest_state & SCTP_ADDR_REACHABLE) {
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net->dest_state &= ~SCTP_ADDR_REACHABLE;
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net->dest_state |= SCTP_ADDR_NOT_REACHABLE;
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if (net == stcb->asoc.primary_destination) {
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net->dest_state |= SCTP_ADDR_WAS_PRIMARY;
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}
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sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
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stcb,
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SCTP_FAILED_THRESHOLD,
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(void *)net);
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}
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}
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/*********HOLD THIS COMMENT FOR PATCH OF ALTERNATE
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*********ROUTING CODE
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*/
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/*********HOLD THIS COMMENT FOR END OF PATCH OF ALTERNATE
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*********ROUTING CODE
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*/
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}
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if (stcb == NULL)
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return (0);
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if (net) {
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if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0) {
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stcb->asoc.overall_error_count++;
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}
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} else {
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stcb->asoc.overall_error_count++;
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}
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#ifdef SCTP_DEBUG
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if (sctp_debug_on & SCTP_DEBUG_TIMER4) {
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printf("Overall error count for %p now %d thresh:%u state:%x\n",
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&stcb->asoc,
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stcb->asoc.overall_error_count,
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(uint32_t) threshold,
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((net == NULL) ? (uint32_t) 0 : (uint32_t) net->dest_state));
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}
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#endif /* SCTP_DEBUG */
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/*
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* We specifically do not do >= to give the assoc one more change
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* before we fail it.
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*/
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if (stcb->asoc.overall_error_count > threshold) {
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/* Abort notification sends a ULP notify */
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struct mbuf *oper;
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oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
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0, M_DONTWAIT, 1, MT_DATA);
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if (oper) {
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struct sctp_paramhdr *ph;
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uint32_t *ippp;
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SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) +
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sizeof(uint32_t);
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ph = mtod(oper, struct sctp_paramhdr *);
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ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
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ph->param_length = htons(SCTP_BUF_LEN(oper));
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ippp = (uint32_t *) (ph + 1);
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*ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_1);
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}
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inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_1;
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sctp_abort_an_association(inp, stcb, SCTP_FAILED_THRESHOLD, oper);
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return (1);
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}
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return (0);
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}
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struct sctp_nets *
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sctp_find_alternate_net(struct sctp_tcb *stcb,
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struct sctp_nets *net,
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int highest_ssthresh)
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{
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/* Find and return an alternate network if possible */
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struct sctp_nets *alt, *mnet, *hthresh = NULL;
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int once;
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uint32_t val = 0;
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if (stcb->asoc.numnets == 1) {
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/* No others but net */
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return (TAILQ_FIRST(&stcb->asoc.nets));
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}
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if (highest_ssthresh) {
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TAILQ_FOREACH(mnet, &stcb->asoc.nets, sctp_next) {
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if (((mnet->dest_state & SCTP_ADDR_REACHABLE) != SCTP_ADDR_REACHABLE) ||
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(mnet->dest_state & SCTP_ADDR_UNCONFIRMED)
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) {
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/*
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* will skip ones that are not-reachable or
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* unconfirmed
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*/
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continue;
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}
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if (val > mnet->ssthresh) {
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hthresh = mnet;
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val = mnet->ssthresh;
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} else if (val == mnet->ssthresh) {
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uint32_t rndval;
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uint8_t this_random;
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if (stcb->asoc.hb_random_idx > 3) {
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rndval = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
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memcpy(stcb->asoc.hb_random_values, &rndval,
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sizeof(stcb->asoc.hb_random_values));
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this_random = stcb->asoc.hb_random_values[0];
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stcb->asoc.hb_random_idx = 0;
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stcb->asoc.hb_ect_randombit = 0;
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} else {
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this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
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stcb->asoc.hb_random_idx++;
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stcb->asoc.hb_ect_randombit = 0;
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}
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if (this_random % 2) {
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hthresh = mnet;
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val = mnet->ssthresh;
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}
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}
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}
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if (hthresh) {
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return (hthresh);
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}
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}
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mnet = net;
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once = 0;
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|
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if (mnet == NULL) {
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mnet = TAILQ_FIRST(&stcb->asoc.nets);
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}
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do {
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alt = TAILQ_NEXT(mnet, sctp_next);
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if (alt == NULL) {
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once++;
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if (once > 1) {
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break;
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}
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alt = TAILQ_FIRST(&stcb->asoc.nets);
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}
|
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if (alt->ro.ro_rt == NULL) {
|
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struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&alt->ro._l_addr;
|
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if (sin6->sin6_family == AF_INET6) {
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(void)sa6_embedscope(sin6, ip6_use_defzone);
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|
}
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rtalloc_ign((struct route *)&alt->ro, 0UL);
|
|
if (sin6->sin6_family == AF_INET6) {
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(void)sa6_recoverscope(sin6);
|
|
}
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|
alt->src_addr_selected = 0;
|
|
}
|
|
if (
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|
((alt->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE) &&
|
|
(alt->ro.ro_rt != NULL) &&
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(!(alt->dest_state & SCTP_ADDR_UNCONFIRMED))
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|
) {
|
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/* Found a reachable address */
|
|
break;
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|
}
|
|
mnet = alt;
|
|
} while (alt != NULL);
|
|
|
|
if (alt == NULL) {
|
|
/* Case where NO insv network exists (dormant state) */
|
|
/* we rotate destinations */
|
|
once = 0;
|
|
mnet = net;
|
|
do {
|
|
alt = TAILQ_NEXT(mnet, sctp_next);
|
|
if (alt == NULL) {
|
|
once++;
|
|
if (once > 1) {
|
|
break;
|
|
}
|
|
alt = TAILQ_FIRST(&stcb->asoc.nets);
|
|
}
|
|
if ((!(alt->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
|
|
(alt != net)) {
|
|
/* Found an alternate address */
|
|
break;
|
|
}
|
|
mnet = alt;
|
|
} while (alt != NULL);
|
|
}
|
|
if (alt == NULL) {
|
|
return (net);
|
|
}
|
|
return (alt);
|
|
}
|
|
|
|
static void
|
|
sctp_backoff_on_timeout(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
int win_probe,
|
|
int num_marked)
|
|
{
|
|
net->RTO <<= 1;
|
|
if (net->RTO > stcb->asoc.maxrto) {
|
|
net->RTO = stcb->asoc.maxrto;
|
|
}
|
|
if ((win_probe == 0) && num_marked) {
|
|
/* We don't apply penalty to window probe scenarios */
|
|
#ifdef SCTP_CWND_MONITOR
|
|
int old_cwnd = net->cwnd;
|
|
|
|
#endif
|
|
net->ssthresh = net->cwnd >> 1;
|
|
if (net->ssthresh < (net->mtu << 1)) {
|
|
net->ssthresh = (net->mtu << 1);
|
|
}
|
|
net->cwnd = net->mtu;
|
|
/* floor of 1 mtu */
|
|
if (net->cwnd < net->mtu)
|
|
net->cwnd = net->mtu;
|
|
#ifdef SCTP_CWND_MONITOR
|
|
sctp_log_cwnd(stcb, net, net->cwnd - old_cwnd, SCTP_CWND_LOG_FROM_RTX);
|
|
#endif
|
|
|
|
net->partial_bytes_acked = 0;
|
|
}
|
|
}
|
|
|
|
extern int sctp_peer_chunk_oh;
|
|
|
|
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)
|
|
{
|
|
|
|
/*
|
|
* 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, *tp2, *could_be_sent = NULL;
|
|
struct sctp_nets *lnets;
|
|
struct timeval now, min_wait, tv;
|
|
int cur_rtt;
|
|
int orig_rwnd, audit_tf, num_mk, fir;
|
|
unsigned int cnt_mk;
|
|
uint32_t orig_flight;
|
|
uint32_t tsnlast, tsnfirst;
|
|
|
|
/*
|
|
* CMT: Using RTX_SSTHRESH policy for CMT. If CMT is being used,
|
|
* then pick dest with largest ssthresh for any retransmission.
|
|
* (iyengar@cis.udel.edu, 2005/08/12)
|
|
*/
|
|
if (sctp_cmt_on_off) {
|
|
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;
|
|
}
|
|
/* none in flight now */
|
|
audit_tf = 0;
|
|
fir = 0;
|
|
/*
|
|
* figure out how long a data chunk must be pending before we can
|
|
* mark it ..
|
|
*/
|
|
SCTP_GETTIME_TIMEVAL(&now);
|
|
/* get cur rto in micro-seconds */
|
|
cur_rtt = (((net->lastsa >> 2) + net->lastsv) >> 1);
|
|
cur_rtt *= 1000;
|
|
#if defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(cur_rtt,
|
|
stcb->asoc.peers_rwnd,
|
|
window_probe,
|
|
SCTP_FR_T3_MARK_TIME);
|
|
sctp_log_fr(net->flight_size,
|
|
SCTP_OS_TIMER_PENDING(&net->fr_timer.timer),
|
|
SCTP_OS_TIMER_ACTIVE(&net->fr_timer.timer),
|
|
SCTP_FR_CWND_REPORT);
|
|
sctp_log_fr(net->flight_size, net->cwnd, stcb->asoc.total_flight, SCTP_FR_CWND_REPORT);
|
|
#endif
|
|
tv.tv_sec = cur_rtt / 1000000;
|
|
tv.tv_usec = cur_rtt % 1000000;
|
|
min_wait = now;
|
|
timevalsub(&min_wait, &tv);
|
|
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 defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(cur_rtt, now.tv_sec, now.tv_usec, SCTP_FR_T3_MARK_TIME);
|
|
sctp_log_fr(0, min_wait.tv_sec, min_wait.tv_usec, SCTP_FR_T3_MARK_TIME);
|
|
#endif
|
|
/*
|
|
* Our rwnd will be incorrect here since we are not adding back the
|
|
* cnt * mbuf but we will fix that down below.
|
|
*/
|
|
orig_rwnd = stcb->asoc.peers_rwnd;
|
|
orig_flight = net->flight_size;
|
|
net->rto_pending = 0;
|
|
net->fast_retran_ip = 0;
|
|
/* Now on to each chunk */
|
|
num_mk = cnt_mk = 0;
|
|
tsnfirst = tsnlast = 0;
|
|
chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
|
|
for (; chk != NULL; chk = tp2) {
|
|
tp2 = TAILQ_NEXT(chk, sctp_next);
|
|
if ((compare_with_wrap(stcb->asoc.last_acked_seq,
|
|
chk->rec.data.TSN_seq,
|
|
MAX_TSN)) ||
|
|
(stcb->asoc.last_acked_seq == chk->rec.data.TSN_seq)) {
|
|
/* Strange case our list got out of order? */
|
|
printf("Our list is out of order?\n");
|
|
panic("Out of order list");
|
|
}
|
|
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 defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(chk->rec.data.TSN_seq,
|
|
chk->sent_rcv_time.tv_sec,
|
|
chk->sent_rcv_time.tv_usec,
|
|
SCTP_FR_T3_MARK_TIME);
|
|
#endif
|
|
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 defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(0,
|
|
chk->sent_rcv_time.tv_sec,
|
|
chk->sent_rcv_time.tv_usec,
|
|
SCTP_FR_T3_STOPPED);
|
|
#endif
|
|
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.
|
|
*/
|
|
#if defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(0,
|
|
chk->sent_rcv_time.tv_sec,
|
|
chk->sent_rcv_time.tv_usec,
|
|
SCTP_FR_T3_STOPPED);
|
|
#endif
|
|
continue;
|
|
}
|
|
}
|
|
if (PR_SCTP_TTL_ENABLED(chk->flags)) {
|
|
/* Is it expired? */
|
|
if ((now.tv_sec > chk->rec.data.timetodrop.tv_sec) ||
|
|
((chk->rec.data.timetodrop.tv_sec == now.tv_sec) &&
|
|
(now.tv_usec > chk->rec.data.timetodrop.tv_usec))) {
|
|
/* Yes so drop it */
|
|
if (chk->data) {
|
|
sctp_release_pr_sctp_chunk(stcb,
|
|
chk,
|
|
(SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT),
|
|
&stcb->asoc.sent_queue);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
if (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) {
|
|
sctp_release_pr_sctp_chunk(stcb,
|
|
chk,
|
|
(SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT),
|
|
&stcb->asoc.sent_queue);
|
|
}
|
|
}
|
|
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_seq;
|
|
}
|
|
tsnlast = chk->rec.data.TSN_seq;
|
|
#if defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(chk->rec.data.TSN_seq, chk->snd_count,
|
|
0, SCTP_FR_T3_MARKED);
|
|
|
|
#endif
|
|
}
|
|
if (stcb->asoc.total_flight_count > 0)
|
|
stcb->asoc.total_flight_count--;
|
|
chk->sent = SCTP_DATAGRAM_RESEND;
|
|
SCTP_STAT_INCR(sctps_markedretrans);
|
|
#ifdef SCTP_FLIGHT_LOGGING
|
|
sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN,
|
|
chk->whoTo->flight_size,
|
|
chk->book_size,
|
|
(uintptr_t) stcb,
|
|
chk->rec.data.TSN_seq);
|
|
#endif
|
|
|
|
if (net->flight_size >= chk->book_size)
|
|
net->flight_size -= chk->book_size;
|
|
else
|
|
net->flight_size = 0;
|
|
|
|
stcb->asoc.peers_rwnd += chk->send_size;
|
|
stcb->asoc.peers_rwnd += sctp_peer_chunk_oh;
|
|
|
|
/* 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 */
|
|
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_seq;
|
|
}
|
|
}
|
|
if (sctp_cmt_on_off == 1) {
|
|
chk->no_fr_allowed = 1;
|
|
}
|
|
} else if (chk->sent == SCTP_DATAGRAM_ACKED) {
|
|
/* remember highest acked one */
|
|
could_be_sent = chk;
|
|
}
|
|
if (chk->sent == SCTP_DATAGRAM_RESEND) {
|
|
cnt_mk++;
|
|
}
|
|
}
|
|
#if defined(SCTP_FR_LOGGING) || defined(SCTP_EARLYFR_LOGGING)
|
|
sctp_log_fr(tsnfirst, tsnlast, num_mk, SCTP_FR_T3_TIMEOUT);
|
|
#endif
|
|
|
|
if (stcb->asoc.total_flight >= (orig_flight - net->flight_size)) {
|
|
stcb->asoc.total_flight -= (orig_flight - net->flight_size);
|
|
} else {
|
|
stcb->asoc.total_flight = 0;
|
|
stcb->asoc.total_flight_count = 0;
|
|
audit_tf = 1;
|
|
}
|
|
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
|
|
if (num_mk) {
|
|
printf("LAST TSN marked was %x\n", tsnlast);
|
|
printf("Num marked for retransmission was %d peer-rwd:%ld\n",
|
|
num_mk, (u_long)stcb->asoc.peers_rwnd);
|
|
printf("LAST TSN marked was %x\n", tsnlast);
|
|
printf("Num marked for retransmission was %d peer-rwd:%d\n",
|
|
num_mk,
|
|
(int)stcb->asoc.peers_rwnd
|
|
);
|
|
}
|
|
}
|
|
#endif
|
|
*num_marked = num_mk;
|
|
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;
|
|
}
|
|
if (stcb->asoc.sent_queue_retran_cnt != cnt_mk) {
|
|
#ifdef INVARIANTS
|
|
printf("Local Audit says there are %d for retran asoc cnt:%d\n",
|
|
cnt_mk, stcb->asoc.sent_queue_retran_cnt);
|
|
#endif
|
|
#ifndef SCTP_AUDITING_ENABLED
|
|
stcb->asoc.sent_queue_retran_cnt = cnt_mk;
|
|
#endif
|
|
}
|
|
/* Now check for a ECN Echo that may be 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;
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
}
|
|
atomic_add_int(&alt->ref_count, 1);
|
|
}
|
|
}
|
|
if (audit_tf) {
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_TIMER4) {
|
|
printf("Audit total flight due to negative value net:%p\n",
|
|
net);
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
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;
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_TIMER4) {
|
|
printf("Net:%p c-f cwnd:%d ssthresh:%d\n",
|
|
lnets, lnets->cwnd, lnets->ssthresh);
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
}
|
|
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
|
|
if (chk->sent < SCTP_DATAGRAM_RESEND) {
|
|
#ifdef SCTP_FLIGHT_LOGGING
|
|
sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
|
|
chk->whoTo->flight_size,
|
|
chk->book_size,
|
|
(uintptr_t) stcb,
|
|
chk->rec.data.TSN_seq);
|
|
#endif
|
|
stcb->asoc.total_flight += chk->book_size;
|
|
chk->whoTo->flight_size += chk->book_size;
|
|
stcb->asoc.total_flight_count++;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Setup the ecn nonce re-sync point. We do this since
|
|
* retranmissions are NOT setup for ECN. This means that do to
|
|
* Karn's rule, we don't know the total of the peers ecn bits.
|
|
*/
|
|
chk = TAILQ_FIRST(&stcb->asoc.send_queue);
|
|
if (chk == NULL) {
|
|
stcb->asoc.nonce_resync_tsn = stcb->asoc.sending_seq;
|
|
} else {
|
|
stcb->asoc.nonce_resync_tsn = chk->rec.data.TSN_seq;
|
|
}
|
|
stcb->asoc.nonce_wait_for_ecne = 0;
|
|
stcb->asoc.nonce_sum_check = 0;
|
|
/* We return 1 if we only have a window probe outstanding */
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sctp_move_all_chunks_to_alt(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net,
|
|
struct sctp_nets *alt)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_stream_out *outs;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_stream_queue_pending *sp;
|
|
|
|
if (net == alt)
|
|
/* nothing to do */
|
|
return;
|
|
|
|
asoc = &stcb->asoc;
|
|
|
|
/*
|
|
* now through all the streams checking for chunks sent to our bad
|
|
* network.
|
|
*/
|
|
TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
|
|
/* now clean up any chunks here */
|
|
TAILQ_FOREACH(sp, &outs->outqueue, next) {
|
|
if (sp->net == net) {
|
|
sctp_free_remote_addr(sp->net);
|
|
sp->net = alt;
|
|
atomic_add_int(&alt->ref_count, 1);
|
|
}
|
|
}
|
|
}
|
|
/* Now check the pending queue */
|
|
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
|
|
if (chk->whoTo == net) {
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
chk->whoTo = alt;
|
|
atomic_add_int(&alt->ref_count, 1);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
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;
|
|
|
|
#ifdef SCTP_FR_LOGGING
|
|
sctp_log_fr(0, 0, 0, SCTP_FR_T3_TIMEOUT);
|
|
#ifdef SCTP_CWND_LOGGING
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#endif
|
|
/* 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;
|
|
}
|
|
alt = sctp_find_alternate_net(stcb, net, 0);
|
|
sctp_mark_all_for_resend(stcb, net, alt, win_probe, &num_mk);
|
|
/* 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;
|
|
|
|
/*
|
|
* 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);
|
|
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;
|
|
unsigned int ms_goneby;
|
|
|
|
SCTP_GETTIME_TIMEVAL(&now);
|
|
if (net->last_sent_time.tv_sec) {
|
|
ms_goneby = (now.tv_sec - net->last_sent_time.tv_sec) * 1000;
|
|
} else {
|
|
ms_goneby = 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, 1, net);
|
|
}
|
|
}
|
|
}
|
|
} 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 (net->dest_state & SCTP_ADDR_NOT_REACHABLE) {
|
|
/* Move all pending over too */
|
|
sctp_move_all_chunks_to_alt(stcb, net, alt);
|
|
/* 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 (sctp_set_primary_addr(stcb,
|
|
(struct sockaddr *)NULL,
|
|
alt) == 0) {
|
|
net->dest_state |= SCTP_ADDR_WAS_PRIMARY;
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* 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->asoc) == 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.peer_supports_prsctp) {
|
|
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 (compare_with_wrap(stcb->asoc.advanced_peer_ack_point,
|
|
stcb->asoc.last_acked_seq, MAX_TSN)) {
|
|
/*
|
|
* ISSUE with ECN, see FWD-TSN processing for notes
|
|
* on issues that will occur when the ECN NONCE
|
|
* stuff is put into SCTP for cross checking.
|
|
*/
|
|
send_forward_tsn(stcb, &stcb->asoc);
|
|
if (lchk) {
|
|
/* Assure a timer is up */
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo);
|
|
}
|
|
}
|
|
}
|
|
#ifdef SCTP_CWND_MONITOR
|
|
sctp_log_cwnd(stcb, net, net->cwnd, SCTP_CWND_LOG_FROM_RTX);
|
|
#endif
|
|
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);
|
|
return (0);
|
|
}
|
|
if (SCTP_GET_STATE((&stcb->asoc)) != 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);
|
|
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 != NULL) && (alt != stcb->asoc.primary_destination)) {
|
|
sctp_move_all_chunks_to_alt(stcb, stcb->asoc.primary_destination, alt);
|
|
stcb->asoc.primary_destination = alt;
|
|
}
|
|
}
|
|
/* Send out a new init */
|
|
sctp_send_initiate(inp, stcb);
|
|
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)
|
|
{
|
|
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->asoc) == SCTP_STATE_COOKIE_ECHOED) {
|
|
/* FOOBAR! */
|
|
struct mbuf *oper;
|
|
|
|
oper = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
|
|
0, M_DONTWAIT, 1, MT_DATA);
|
|
if (oper) {
|
|
struct sctp_paramhdr *ph;
|
|
uint32_t *ippp;
|
|
|
|
SCTP_BUF_LEN(oper) = sizeof(struct sctp_paramhdr) +
|
|
sizeof(uint32_t);
|
|
ph = mtod(oper, struct sctp_paramhdr *);
|
|
ph->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
|
|
ph->param_length = htons(SCTP_BUF_LEN(oper));
|
|
ippp = (uint32_t *) (ph + 1);
|
|
*ippp = htonl(SCTP_FROM_SCTP_TIMER + SCTP_LOC_2);
|
|
}
|
|
inp->last_abort_code = SCTP_FROM_SCTP_TIMER + SCTP_LOC_3;
|
|
sctp_abort_an_association(inp, stcb, SCTP_INTERNAL_ERROR,
|
|
oper);
|
|
} else {
|
|
#ifdef INVARIANTS
|
|
panic("Cookie timer expires in wrong state?");
|
|
#else
|
|
printf("Strange in state %d not cookie-echoed yet c-e timer expires?\n", SCTP_GET_STATE(&stcb->asoc));
|
|
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 theshold management now lets backoff the address & select
|
|
* an alternate
|
|
*/
|
|
stcb->asoc.dropped_special_cnt = 0;
|
|
sctp_backoff_on_timeout(stcb, cookie->whoTo, 1, 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;
|
|
/*
|
|
* 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 *net)
|
|
{
|
|
struct sctp_nets *alt;
|
|
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 */
|
|
sctp_find_stream_reset(stcb, stcb->asoc.str_reset_seq_out, &strrst);
|
|
if (strrst == NULL) {
|
|
return (0);
|
|
}
|
|
/* do threshold management */
|
|
if (sctp_threshold_management(inp, stcb, strrst->whoTo,
|
|
stcb->asoc.max_send_times)) {
|
|
/* Assoc is over */
|
|
return (1);
|
|
}
|
|
/*
|
|
* cleared theshold management now lets backoff the address & select
|
|
* an alternate
|
|
*/
|
|
sctp_backoff_on_timeout(stcb, strrst->whoTo, 1, 0);
|
|
alt = sctp_find_alternate_net(stcb, strrst->whoTo, 0);
|
|
sctp_free_remote_addr(strrst->whoTo);
|
|
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;
|
|
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_NOT_REACHABLE) {
|
|
/*
|
|
* If the address went un-reachable, we need to move to
|
|
* alternates for ALL chk's in queue
|
|
*/
|
|
sctp_move_all_chunks_to_alt(stcb, net, alt);
|
|
}
|
|
/* mark the retran info */
|
|
if (strrst->sent != SCTP_DATAGRAM_RESEND)
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
strrst->sent = SCTP_DATAGRAM_RESEND;
|
|
|
|
/* restart the timer */
|
|
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, inp, stcb, strrst->whoTo);
|
|
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 the first send, or a retransmission? */
|
|
if (stcb->asoc.asconf_sent == 0) {
|
|
/* compose a new ASCONF chunk and send it */
|
|
sctp_send_asconf(stcb, net);
|
|
} else {
|
|
/* Retransmission of the existing ASCONF needed... */
|
|
|
|
/* find the existing ASCONF */
|
|
TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
|
|
sctp_next) {
|
|
if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
|
|
break;
|
|
}
|
|
}
|
|
if (asconf == NULL) {
|
|
return (0);
|
|
}
|
|
/* do threshold management */
|
|
if (sctp_threshold_management(inp, stcb, asconf->whoTo,
|
|
stcb->asoc.max_send_times)) {
|
|
/* Assoc is over */
|
|
return (1);
|
|
}
|
|
/*
|
|
* PETER? FIX? How will the following code ever run? If the
|
|
* max_send_times is hit, threshold managment will blow away
|
|
* the association?
|
|
*/
|
|
if (asconf->snd_count > stcb->asoc.max_send_times) {
|
|
/*
|
|
* Something is rotten, peer is not responding to
|
|
* ASCONFs but maybe is to data etc. e.g. it is not
|
|
* properly handling the chunk type upper bits Mark
|
|
* this peer as ASCONF incapable and cleanup
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
|
|
printf("asconf_timer: Peer has not responded to our repeated ASCONFs\n");
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
sctp_asconf_cleanup(stcb, net);
|
|
return (0);
|
|
}
|
|
/*
|
|
* cleared theshold management now lets backoff the address
|
|
* & select an alternate
|
|
*/
|
|
sctp_backoff_on_timeout(stcb, asconf->whoTo, 1, 0);
|
|
alt = sctp_find_alternate_net(stcb, asconf->whoTo, 0);
|
|
sctp_free_remote_addr(asconf->whoTo);
|
|
asconf->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);
|
|
chk->whoTo = alt;
|
|
if (chk->sent != SCTP_DATAGRAM_RESEND) {
|
|
chk->sent = SCTP_DATAGRAM_RESEND;
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
}
|
|
atomic_add_int(&alt->ref_count, 1);
|
|
}
|
|
}
|
|
if (net->dest_state & SCTP_ADDR_NOT_REACHABLE) {
|
|
/*
|
|
* If the address went un-reachable, we need to move
|
|
* to alternates for ALL chk's in queue
|
|
*/
|
|
sctp_move_all_chunks_to_alt(stcb, net, alt);
|
|
}
|
|
/* mark the retran info */
|
|
if (asconf->sent != SCTP_DATAGRAM_RESEND)
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
asconf->sent = SCTP_DATAGRAM_RESEND;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
sctp_shutdown_timer(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
struct sctp_nets *alt;
|
|
|
|
/* first threshold managment */
|
|
if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
|
|
/* Assoc is over */
|
|
return (1);
|
|
}
|
|
/* second select an alternative */
|
|
alt = sctp_find_alternate_net(stcb, net, 0);
|
|
|
|
/* third generate a shutdown into the queue for out net */
|
|
if (alt) {
|
|
sctp_send_shutdown(stcb, alt);
|
|
} else {
|
|
/*
|
|
* if alt is NULL, there is no dest to send to??
|
|
*/
|
|
return (0);
|
|
}
|
|
/* 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 managment */
|
|
if (sctp_threshold_management(inp, stcb, net, stcb->asoc.max_send_times)) {
|
|
/* Assoc is over */
|
|
return (1);
|
|
}
|
|
/* 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_out *outs;
|
|
struct sctp_stream_queue_pending *sp;
|
|
unsigned int chks_in_queue = 0;
|
|
int being_filled = 0;
|
|
|
|
/*
|
|
* This function is ONLY called when the send/sent queues are empty.
|
|
*/
|
|
if ((stcb == NULL) || (inp == NULL))
|
|
return;
|
|
|
|
if (stcb->asoc.sent_queue_retran_cnt) {
|
|
printf("Hmm, sent_queue_retran_cnt is non-zero %d\n",
|
|
stcb->asoc.sent_queue_retran_cnt);
|
|
stcb->asoc.sent_queue_retran_cnt = 0;
|
|
}
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
if (TAILQ_EMPTY(&stcb->asoc.out_wheel)) {
|
|
int i, cnt = 0;
|
|
|
|
/* Check to see if a spoke fell off the wheel */
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
|
|
sctp_insert_on_wheel(stcb, &stcb->asoc, &stcb->asoc.strmout[i], 1);
|
|
cnt++;
|
|
}
|
|
}
|
|
if (cnt) {
|
|
/* yep, we lost a spoke or two */
|
|
printf("Found an additional %d streams NOT on outwheel, corrected\n", cnt);
|
|
} else {
|
|
/* no spokes lost, */
|
|
stcb->asoc.total_output_queue_size = 0;
|
|
}
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
return;
|
|
}
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
/* Check to see if some data queued, if so report it */
|
|
TAILQ_FOREACH(outs, &stcb->asoc.out_wheel, next_spoke) {
|
|
if (!TAILQ_EMPTY(&outs->outqueue)) {
|
|
TAILQ_FOREACH(sp, &outs->outqueue, next) {
|
|
if (sp->msg_is_complete)
|
|
being_filled++;
|
|
chks_in_queue++;
|
|
}
|
|
}
|
|
}
|
|
if (chks_in_queue != stcb->asoc.stream_queue_cnt) {
|
|
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);
|
|
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) {
|
|
printf("Still nothing moved %d chunks are stuck\n",
|
|
chks_in_queue);
|
|
}
|
|
}
|
|
} else {
|
|
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, int cnt_of_unconf)
|
|
{
|
|
if (net) {
|
|
if (net->hb_responded == 0) {
|
|
sctp_backoff_on_timeout(stcb, net, 1, 0);
|
|
}
|
|
/* Zero PBA, if it needs it */
|
|
if (net->partial_bytes_acked) {
|
|
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);
|
|
}
|
|
/* Send a new HB, this will do threshold managment, pick a new dest */
|
|
if (cnt_of_unconf == 0) {
|
|
if (sctp_send_hb(stcb, 0, NULL) < 0) {
|
|
return (1);
|
|
}
|
|
} else {
|
|
/*
|
|
* this will send out extra hb's up to maxburst if there are
|
|
* any unconfirmed addresses.
|
|
*/
|
|
int cnt_sent = 0;
|
|
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
|
|
(net->dest_state & SCTP_ADDR_REACHABLE)) {
|
|
cnt_sent++;
|
|
if (sctp_send_hb(stcb, 1, net) == 0) {
|
|
break;
|
|
}
|
|
if (cnt_sent >= stcb->asoc.max_burst)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_is_hb_timer_running(struct sctp_tcb *stcb)
|
|
{
|
|
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.hb_timer.timer)) {
|
|
/* its running */
|
|
return (1);
|
|
} else {
|
|
/* nope */
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
int
|
|
sctp_is_sack_timer_running(struct sctp_tcb *stcb)
|
|
{
|
|
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
|
|
/* its running */
|
|
return (1);
|
|
} else {
|
|
/* nope */
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
#define SCTP_NUMBER_OF_MTU_SIZES 18
|
|
static uint32_t mtu_sizes[] = {
|
|
68,
|
|
296,
|
|
508,
|
|
512,
|
|
544,
|
|
576,
|
|
1006,
|
|
1492,
|
|
1500,
|
|
1536,
|
|
2002,
|
|
2048,
|
|
4352,
|
|
4464,
|
|
8166,
|
|
17914,
|
|
32000,
|
|
65535
|
|
};
|
|
|
|
|
|
static uint32_t
|
|
sctp_getnext_mtu(struct sctp_inpcb *inp, uint32_t cur_mtu)
|
|
{
|
|
/* select another MTU that is just bigger than this one */
|
|
int i;
|
|
|
|
for (i = 0; i < SCTP_NUMBER_OF_MTU_SIZES; i++) {
|
|
if (cur_mtu < mtu_sizes[i]) {
|
|
/* no max_mtu is bigger than this one */
|
|
return (mtu_sizes[i]);
|
|
}
|
|
}
|
|
/* here return the highest allowable */
|
|
return (cur_mtu);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_pathmtu_timer(struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
uint32_t next_mtu;
|
|
|
|
/* restart the timer in any case */
|
|
next_mtu = sctp_getnext_mtu(inp, net->mtu);
|
|
if (next_mtu <= net->mtu) {
|
|
/* nothing to do */
|
|
return;
|
|
}
|
|
if (net->ro.ro_rt != NULL) {
|
|
/*
|
|
* only if we have a route and interface do we set anything.
|
|
* Note we always restart the timer though just in case it
|
|
* is updated (i.e. the ifp) or route/ifp is populated.
|
|
*/
|
|
if (net->ro.ro_rt->rt_ifp != NULL) {
|
|
if (net->ro.ro_rt->rt_ifp->if_mtu > next_mtu) {
|
|
/* ok it will fit out the door */
|
|
net->mtu = next_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 sctp_nets *net)
|
|
{
|
|
struct timeval tn, *tim_touse;
|
|
struct sctp_association *asoc;
|
|
int ticks_gone_by;
|
|
|
|
SCTP_GETTIME_TIMEVAL(&tn);
|
|
if (stcb->asoc.sctp_autoclose_ticks &&
|
|
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 = SEC_TO_TICKS(tn.tv_sec - tim_touse->tv_sec);
|
|
if ((ticks_gone_by > 0) &&
|
|
(ticks_gone_by >= (int)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);
|
|
/* 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(asoc) !=
|
|
SCTP_STATE_SHUTDOWN_SENT) {
|
|
/* only send SHUTDOWN 1st time thru */
|
|
sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
|
|
asoc->state = SCTP_STATE_SHUTDOWN_SENT;
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
|
|
stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
|
|
stcb->sctp_ep, stcb,
|
|
asoc->primary_destination);
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* No auto close at this time, reset t-o to check
|
|
* later
|
|
*/
|
|
int 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,
|
|
net);
|
|
/* restore the real tick value */
|
|
asoc->sctp_autoclose_ticks = tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
sctp_iterator_timer(struct sctp_iterator *it)
|
|
{
|
|
int iteration_count = 0;
|
|
|
|
/*
|
|
* only one iterator can run at a time. This is the only way we can
|
|
* cleanly pull ep's from underneath all the running interators when
|
|
* a ep is freed.
|
|
*/
|
|
SCTP_ITERATOR_LOCK();
|
|
if (it->inp == NULL) {
|
|
/* iterator is complete */
|
|
done_with_iterator:
|
|
SCTP_ITERATOR_UNLOCK();
|
|
SCTP_INP_INFO_WLOCK();
|
|
LIST_REMOVE(it, sctp_nxt_itr);
|
|
/* stopping the callout is not needed, in theory */
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_OS_TIMER_STOP(&it->tmr.timer);
|
|
if (it->function_atend != NULL) {
|
|
(*it->function_atend) (it->pointer, it->val);
|
|
}
|
|
SCTP_FREE(it);
|
|
return;
|
|
}
|
|
select_a_new_ep:
|
|
SCTP_INP_WLOCK(it->inp);
|
|
while (((it->pcb_flags) &&
|
|
((it->inp->sctp_flags & it->pcb_flags) != it->pcb_flags)) ||
|
|
((it->pcb_features) &&
|
|
((it->inp->sctp_features & it->pcb_features) != it->pcb_features))) {
|
|
/* endpoint flags or features don't match, so keep looking */
|
|
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
|
|
SCTP_INP_WUNLOCK(it->inp);
|
|
goto done_with_iterator;
|
|
}
|
|
SCTP_INP_WUNLOCK(it->inp);
|
|
it->inp = LIST_NEXT(it->inp, sctp_list);
|
|
if (it->inp == NULL) {
|
|
goto done_with_iterator;
|
|
}
|
|
SCTP_INP_WLOCK(it->inp);
|
|
}
|
|
if ((it->inp->inp_starting_point_for_iterator != NULL) &&
|
|
(it->inp->inp_starting_point_for_iterator != it)) {
|
|
printf("Iterator collision, waiting for one at %p\n",
|
|
it->inp);
|
|
SCTP_INP_WUNLOCK(it->inp);
|
|
goto start_timer_return;
|
|
}
|
|
/* mark the current iterator on the endpoint */
|
|
it->inp->inp_starting_point_for_iterator = it;
|
|
SCTP_INP_WUNLOCK(it->inp);
|
|
SCTP_INP_RLOCK(it->inp);
|
|
/* now go through each assoc which is in the desired state */
|
|
if (it->stcb == NULL) {
|
|
/* run the per instance function */
|
|
if (it->function_inp != NULL)
|
|
(*it->function_inp) (it->inp, it->pointer, it->val);
|
|
|
|
it->stcb = LIST_FIRST(&it->inp->sctp_asoc_list);
|
|
}
|
|
SCTP_INP_RUNLOCK(it->inp);
|
|
if ((it->stcb) &&
|
|
(it->stcb->asoc.stcb_starting_point_for_iterator == it)) {
|
|
it->stcb->asoc.stcb_starting_point_for_iterator = NULL;
|
|
}
|
|
while (it->stcb) {
|
|
SCTP_TCB_LOCK(it->stcb);
|
|
if (it->asoc_state && ((it->stcb->asoc.state & it->asoc_state) != it->asoc_state)) {
|
|
/* not in the right state... keep looking */
|
|
SCTP_TCB_UNLOCK(it->stcb);
|
|
goto next_assoc;
|
|
}
|
|
/* mark the current iterator on the assoc */
|
|
it->stcb->asoc.stcb_starting_point_for_iterator = it;
|
|
/* see if we have limited out the iterator loop */
|
|
iteration_count++;
|
|
if (iteration_count > SCTP_ITERATOR_MAX_AT_ONCE) {
|
|
start_timer_return:
|
|
/* set a timer to continue this later */
|
|
SCTP_TCB_UNLOCK(it->stcb);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR,
|
|
(struct sctp_inpcb *)it, NULL, NULL);
|
|
SCTP_ITERATOR_UNLOCK();
|
|
return;
|
|
}
|
|
/* run function on this one */
|
|
(*it->function_assoc) (it->inp, it->stcb, it->pointer, it->val);
|
|
|
|
/*
|
|
* we lie here, it really needs to have its own type but
|
|
* first I must verify that this won't effect things :-0
|
|
*/
|
|
if (it->no_chunk_output == 0)
|
|
sctp_chunk_output(it->inp, it->stcb, SCTP_OUTPUT_FROM_T3);
|
|
|
|
SCTP_TCB_UNLOCK(it->stcb);
|
|
next_assoc:
|
|
it->stcb = LIST_NEXT(it->stcb, sctp_tcblist);
|
|
}
|
|
/* done with all assocs on this endpoint, move on to next endpoint */
|
|
SCTP_INP_WLOCK(it->inp);
|
|
it->inp->inp_starting_point_for_iterator = NULL;
|
|
SCTP_INP_WUNLOCK(it->inp);
|
|
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
|
|
it->inp = NULL;
|
|
} else {
|
|
SCTP_INP_INFO_RLOCK();
|
|
it->inp = LIST_NEXT(it->inp, sctp_list);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
}
|
|
if (it->inp == NULL) {
|
|
goto done_with_iterator;
|
|
}
|
|
goto select_a_new_ep;
|
|
}
|