Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+		}
+	}
+}
+