Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 8724 insertions, 0 deletions

diff --git a/netwerk/sctp/src/netinet/sctputil.c b/netwerk/sctp/src/netinet/sctputil.c
new file mode 100644
index 0000000000..af062001da
--- /dev/null
+++ b/netwerk/sctp/src/netinet/sctputil.c
@@ -0,0 +1,8724 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2001-2008, 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.
+ */
+
+#include <netinet/sctp_os.h>
+#include <netinet/sctp_pcb.h>
+#include <netinet/sctputil.h>
+#include <netinet/sctp_var.h>
+#include <netinet/sctp_sysctl.h>
+#ifdef INET6
+#if defined(__Userspace__) || defined(__FreeBSD__)
+#include <netinet6/sctp6_var.h>
+#endif
+#endif
+#include <netinet/sctp_header.h>
+#include <netinet/sctp_output.h>
+#include <netinet/sctp_uio.h>
+#include <netinet/sctp_timer.h>
+#include <netinet/sctp_indata.h>
+#include <netinet/sctp_auth.h>
+#include <netinet/sctp_asconf.h>
+#include <netinet/sctp_bsd_addr.h>
+#if defined(__Userspace__)
+#include <netinet/sctp_constants.h>
+#endif
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+#include <netinet/sctp_kdtrace.h>
+#if defined(INET6) || defined(INET)
+#include <netinet/tcp_var.h>
+#endif
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <sys/proc.h>
+#ifdef INET6
+#include <netinet/icmp6.h>
+#endif
+#endif
+
+#if defined(_WIN32) && !defined(__Userspace__)
+#if !defined(SCTP_LOCAL_TRACE_BUF)
+#include "eventrace_netinet.h"
+#include "sctputil.tmh" /* this is the file that will be auto generated */
+#endif
+#else
+#ifndef KTR_SCTP
+#define KTR_SCTP KTR_SUBSYS
+#endif
+#endif
+
+extern const struct sctp_cc_functions sctp_cc_functions[];
+extern const struct sctp_ss_functions sctp_ss_functions[];
+
+void
+sctp_sblog(struct sockbuf *sb, struct sctp_tcb *stcb, int from, int incr)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.sb.stcb = stcb;
+	sctp_clog.x.sb.so_sbcc = SCTP_SBAVAIL(sb);
+	if (stcb)
+		sctp_clog.x.sb.stcb_sbcc = stcb->asoc.sb_cc;
+	else
+		sctp_clog.x.sb.stcb_sbcc = 0;
+	sctp_clog.x.sb.incr = incr;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_SB,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.close.inp = (void *)inp;
+	sctp_clog.x.close.sctp_flags = inp->sctp_flags;
+	if (stcb) {
+		sctp_clog.x.close.stcb = (void *)stcb;
+		sctp_clog.x.close.state = (uint16_t)stcb->asoc.state;
+	} else {
+		sctp_clog.x.close.stcb = 0;
+		sctp_clog.x.close.state = 0;
+	}
+	sctp_clog.x.close.loc = loc;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_CLOSE,
+	     0,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+rto_logging(struct sctp_nets *net, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	memset(&sctp_clog, 0, sizeof(sctp_clog));
+	sctp_clog.x.rto.net = (void *) net;
+	sctp_clog.x.rto.rtt = net->rtt / 1000;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_RTT,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t tsn, uint16_t sseq, uint16_t stream, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.strlog.stcb = stcb;
+	sctp_clog.x.strlog.n_tsn = tsn;
+	sctp_clog.x.strlog.n_sseq = sseq;
+	sctp_clog.x.strlog.e_tsn = 0;
+	sctp_clog.x.strlog.e_sseq = 0;
+	sctp_clog.x.strlog.strm = stream;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_STRM,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_nagle_event(struct sctp_tcb *stcb, int action)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.nagle.stcb = (void *)stcb;
+	sctp_clog.x.nagle.total_flight = stcb->asoc.total_flight;
+	sctp_clog.x.nagle.total_in_queue = stcb->asoc.total_output_queue_size;
+	sctp_clog.x.nagle.count_in_queue = stcb->asoc.chunks_on_out_queue;
+	sctp_clog.x.nagle.count_in_flight = stcb->asoc.total_flight_count;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_NAGLE,
+	     action,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_sack(uint32_t old_cumack, uint32_t cumack, uint32_t tsn, uint16_t gaps, uint16_t dups, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.sack.cumack = cumack;
+	sctp_clog.x.sack.oldcumack = old_cumack;
+	sctp_clog.x.sack.tsn = tsn;
+	sctp_clog.x.sack.numGaps = gaps;
+	sctp_clog.x.sack.numDups = dups;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_SACK,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	memset(&sctp_clog, 0, sizeof(sctp_clog));
+	sctp_clog.x.map.base = map;
+	sctp_clog.x.map.cum = cum;
+	sctp_clog.x.map.high = high;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_MAP,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_fr(uint32_t biggest_tsn, uint32_t biggest_new_tsn, uint32_t tsn, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	memset(&sctp_clog, 0, sizeof(sctp_clog));
+	sctp_clog.x.fr.largest_tsn = biggest_tsn;
+	sctp_clog.x.fr.largest_new_tsn = biggest_new_tsn;
+	sctp_clog.x.fr.tsn = tsn;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_FR,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+#ifdef SCTP_MBUF_LOGGING
+void
+sctp_log_mb(struct mbuf *m, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.mb.mp = m;
+	sctp_clog.x.mb.mbuf_flags = (uint8_t)(SCTP_BUF_GET_FLAGS(m));
+	sctp_clog.x.mb.size = (uint16_t)(SCTP_BUF_LEN(m));
+	sctp_clog.x.mb.data = SCTP_BUF_AT(m, 0);
+	if (SCTP_BUF_IS_EXTENDED(m)) {
+		sctp_clog.x.mb.ext = SCTP_BUF_EXTEND_BASE(m);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		/* APPLE does not use a ref_cnt, but a forward/backward ref queue */
+#else
+		sctp_clog.x.mb.refcnt = (uint8_t)(SCTP_BUF_EXTEND_REFCNT(m));
+#endif
+	} else {
+		sctp_clog.x.mb.ext = 0;
+		sctp_clog.x.mb.refcnt = 0;
+	}
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_MBUF,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_mbc(struct mbuf *m, int from)
+{
+	struct mbuf *mat;
+
+	for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
+		sctp_log_mb(mat, from);
+	}
+}
+#endif
+
+void
+sctp_log_strm_del(struct sctp_queued_to_read *control, struct sctp_queued_to_read *poschk, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	if (control == NULL) {
+		SCTP_PRINTF("Gak log of NULL?\n");
+		return;
+	}
+	sctp_clog.x.strlog.stcb = control->stcb;
+	sctp_clog.x.strlog.n_tsn = control->sinfo_tsn;
+	sctp_clog.x.strlog.n_sseq = (uint16_t)control->mid;
+	sctp_clog.x.strlog.strm = control->sinfo_stream;
+	if (poschk != NULL) {
+		sctp_clog.x.strlog.e_tsn = poschk->sinfo_tsn;
+		sctp_clog.x.strlog.e_sseq = (uint16_t)poschk->mid;
+	} else {
+		sctp_clog.x.strlog.e_tsn = 0;
+		sctp_clog.x.strlog.e_sseq = 0;
+	}
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_STRM,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.cwnd.net = net;
+	if (stcb->asoc.send_queue_cnt > 255)
+		sctp_clog.x.cwnd.cnt_in_send = 255;
+	else
+		sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
+	if (stcb->asoc.stream_queue_cnt > 255)
+		sctp_clog.x.cwnd.cnt_in_str = 255;
+	else
+		sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
+
+	if (net) {
+		sctp_clog.x.cwnd.cwnd_new_value = net->cwnd;
+		sctp_clog.x.cwnd.inflight = net->flight_size;
+		sctp_clog.x.cwnd.pseudo_cumack = net->pseudo_cumack;
+		sctp_clog.x.cwnd.meets_pseudo_cumack = net->new_pseudo_cumack;
+		sctp_clog.x.cwnd.need_new_pseudo_cumack = net->find_pseudo_cumack;
+	}
+	if (SCTP_CWNDLOG_PRESEND == from) {
+		sctp_clog.x.cwnd.meets_pseudo_cumack = stcb->asoc.peers_rwnd;
+	}
+	sctp_clog.x.cwnd.cwnd_augment = augment;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_CWND,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+#if !defined(__APPLE__) && !defined(__Userspace__)
+void
+sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	memset(&sctp_clog, 0, sizeof(sctp_clog));
+	if (inp) {
+		sctp_clog.x.lock.sock = (void *) inp->sctp_socket;
+
+	} else {
+		sctp_clog.x.lock.sock = (void *) NULL;
+	}
+	sctp_clog.x.lock.inp = (void *) inp;
+#if defined(__FreeBSD__)
+	if (stcb) {
+		sctp_clog.x.lock.tcb_lock = mtx_owned(&stcb->tcb_mtx);
+	} else {
+		sctp_clog.x.lock.tcb_lock = SCTP_LOCK_UNKNOWN;
+	}
+	if (inp) {
+		sctp_clog.x.lock.inp_lock = mtx_owned(&inp->inp_mtx);
+		sctp_clog.x.lock.create_lock = mtx_owned(&inp->inp_create_mtx);
+	} else {
+		sctp_clog.x.lock.inp_lock = SCTP_LOCK_UNKNOWN;
+		sctp_clog.x.lock.create_lock = SCTP_LOCK_UNKNOWN;
+	}
+	sctp_clog.x.lock.info_lock = rw_wowned(&SCTP_BASE_INFO(ipi_ep_mtx));
+	if (inp && (inp->sctp_socket)) {
+		sctp_clog.x.lock.sock_lock = mtx_owned(SOCK_MTX(inp->sctp_socket));
+		sctp_clog.x.lock.sockrcvbuf_lock = mtx_owned(SOCKBUF_MTX(&inp->sctp_socket->so_rcv));
+		sctp_clog.x.lock.socksndbuf_lock = mtx_owned(SOCKBUF_MTX(&inp->sctp_socket->so_snd));
+	} else {
+		sctp_clog.x.lock.sock_lock = SCTP_LOCK_UNKNOWN;
+		sctp_clog.x.lock.sockrcvbuf_lock = SCTP_LOCK_UNKNOWN;
+		sctp_clog.x.lock.socksndbuf_lock = SCTP_LOCK_UNKNOWN;
+	}
+#endif
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_LOCK_EVENT,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+#endif
+
+void
+sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *net, int error, int burst, uint8_t from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	memset(&sctp_clog, 0, sizeof(sctp_clog));
+	sctp_clog.x.cwnd.net = net;
+	sctp_clog.x.cwnd.cwnd_new_value = error;
+	sctp_clog.x.cwnd.inflight = net->flight_size;
+	sctp_clog.x.cwnd.cwnd_augment = burst;
+	if (stcb->asoc.send_queue_cnt > 255)
+		sctp_clog.x.cwnd.cnt_in_send = 255;
+	else
+		sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
+	if (stcb->asoc.stream_queue_cnt > 255)
+		sctp_clog.x.cwnd.cnt_in_str = 255;
+	else
+		sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_MAXBURST,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_rwnd(uint8_t from, uint32_t peers_rwnd, uint32_t snd_size, uint32_t overhead)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.rwnd.rwnd = peers_rwnd;
+	sctp_clog.x.rwnd.send_size = snd_size;
+	sctp_clog.x.rwnd.overhead = overhead;
+	sctp_clog.x.rwnd.new_rwnd = 0;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_RWND,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_rwnd_set(uint8_t from, uint32_t peers_rwnd, uint32_t flight_size, uint32_t overhead, uint32_t a_rwndval)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.rwnd.rwnd = peers_rwnd;
+	sctp_clog.x.rwnd.send_size = flight_size;
+	sctp_clog.x.rwnd.overhead = overhead;
+	sctp_clog.x.rwnd.new_rwnd = a_rwndval;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_RWND,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+#ifdef SCTP_MBCNT_LOGGING
+static void
+sctp_log_mbcnt(uint8_t from, uint32_t total_oq, uint32_t book, uint32_t total_mbcnt_q, uint32_t mbcnt)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.mbcnt.total_queue_size = total_oq;
+	sctp_clog.x.mbcnt.size_change = book;
+	sctp_clog.x.mbcnt.total_queue_mb_size = total_mbcnt_q;
+	sctp_clog.x.mbcnt.mbcnt_change = mbcnt;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_MBCNT,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+#endif
+
+void
+sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_MISC_EVENT,
+	     from,
+	     a, b, c, d);
+#endif
+}
+
+void
+sctp_wakeup_log(struct sctp_tcb *stcb, uint32_t wake_cnt, int from)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.wake.stcb = (void *)stcb;
+	sctp_clog.x.wake.wake_cnt = wake_cnt;
+	sctp_clog.x.wake.flight = stcb->asoc.total_flight_count;
+	sctp_clog.x.wake.send_q = stcb->asoc.send_queue_cnt;
+	sctp_clog.x.wake.sent_q = stcb->asoc.sent_queue_cnt;
+
+	if (stcb->asoc.stream_queue_cnt < 0xff)
+		sctp_clog.x.wake.stream_qcnt = (uint8_t) stcb->asoc.stream_queue_cnt;
+	else
+		sctp_clog.x.wake.stream_qcnt = 0xff;
+
+	if (stcb->asoc.chunks_on_out_queue < 0xff)
+		sctp_clog.x.wake.chunks_on_oque = (uint8_t) stcb->asoc.chunks_on_out_queue;
+	else
+		sctp_clog.x.wake.chunks_on_oque = 0xff;
+
+	sctp_clog.x.wake.sctpflags = 0;
+	/* set in the defered mode stuff */
+	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE)
+		sctp_clog.x.wake.sctpflags |= 1;
+	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT)
+		sctp_clog.x.wake.sctpflags |= 2;
+	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT)
+		sctp_clog.x.wake.sctpflags |= 4;
+	/* what about the sb */
+	if (stcb->sctp_socket) {
+		struct socket *so = stcb->sctp_socket;
+
+		sctp_clog.x.wake.sbflags = (uint8_t)((so->so_snd.sb_flags & 0x00ff));
+	} else {
+		sctp_clog.x.wake.sbflags = 0xff;
+	}
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_WAKE,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+void
+sctp_log_block(uint8_t from, struct sctp_association *asoc, ssize_t sendlen)
+{
+#if defined(SCTP_LOCAL_TRACE_BUF)
+	struct sctp_cwnd_log sctp_clog;
+
+	sctp_clog.x.blk.onsb = asoc->total_output_queue_size;
+	sctp_clog.x.blk.send_sent_qcnt = (uint16_t) (asoc->send_queue_cnt + asoc->sent_queue_cnt);
+	sctp_clog.x.blk.peer_rwnd = asoc->peers_rwnd;
+	sctp_clog.x.blk.stream_qcnt = (uint16_t) asoc->stream_queue_cnt;
+	sctp_clog.x.blk.chunks_on_oque = (uint16_t) asoc->chunks_on_out_queue;
+	sctp_clog.x.blk.flight_size = (uint16_t) (asoc->total_flight/1024);
+	sctp_clog.x.blk.sndlen = (uint32_t)sendlen;
+	SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
+	     SCTP_LOG_EVENT_BLOCK,
+	     from,
+	     sctp_clog.x.misc.log1,
+	     sctp_clog.x.misc.log2,
+	     sctp_clog.x.misc.log3,
+	     sctp_clog.x.misc.log4);
+#endif
+}
+
+int
+sctp_fill_stat_log(void *optval SCTP_UNUSED, size_t *optsize SCTP_UNUSED)
+{
+	/* May need to fix this if ktrdump does not work */
+	return (0);
+}
+
+#ifdef SCTP_AUDITING_ENABLED
+uint8_t sctp_audit_data[SCTP_AUDIT_SIZE][2];
+static int sctp_audit_indx = 0;
+
+static
+void
+sctp_print_audit_report(void)
+{
+	int i;
+	int cnt;
+
+	cnt = 0;
+	for (i = sctp_audit_indx; i < SCTP_AUDIT_SIZE; i++) {
+		if ((sctp_audit_data[i][0] == 0xe0) &&
+		    (sctp_audit_data[i][1] == 0x01)) {
+			cnt = 0;
+			SCTP_PRINTF("\n");
+		} else if (sctp_audit_data[i][0] == 0xf0) {
+			cnt = 0;
+			SCTP_PRINTF("\n");
+		} else if ((sctp_audit_data[i][0] == 0xc0) &&
+		    (sctp_audit_data[i][1] == 0x01)) {
+			SCTP_PRINTF("\n");
+			cnt = 0;
+		}
+		SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
+			    (uint32_t) sctp_audit_data[i][1]);
+		cnt++;
+		if ((cnt % 14) == 0)
+			SCTP_PRINTF("\n");
+	}
+	for (i = 0; i < sctp_audit_indx; i++) {
+		if ((sctp_audit_data[i][0] == 0xe0) &&
+		    (sctp_audit_data[i][1] == 0x01)) {
+			cnt = 0;
+			SCTP_PRINTF("\n");
+		} else if (sctp_audit_data[i][0] == 0xf0) {
+			cnt = 0;
+			SCTP_PRINTF("\n");
+		} else if ((sctp_audit_data[i][0] == 0xc0) &&
+		    (sctp_audit_data[i][1] == 0x01)) {
+			SCTP_PRINTF("\n");
+			cnt = 0;
+		}
+		SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
+			    (uint32_t) sctp_audit_data[i][1]);
+		cnt++;
+		if ((cnt % 14) == 0)
+			SCTP_PRINTF("\n");
+	}
+	SCTP_PRINTF("\n");
+}
+
+void
+sctp_auditing(int from, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+    struct sctp_nets *net)
+{
+	int resend_cnt, tot_out, rep, tot_book_cnt;
+	struct sctp_nets *lnet;
+	struct sctp_tmit_chunk *chk;
+
+	sctp_audit_data[sctp_audit_indx][0] = 0xAA;
+	sctp_audit_data[sctp_audit_indx][1] = 0x000000ff & from;
+	sctp_audit_indx++;
+	if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+		sctp_audit_indx = 0;
+	}
+	if (inp == NULL) {
+		sctp_audit_data[sctp_audit_indx][0] = 0xAF;
+		sctp_audit_data[sctp_audit_indx][1] = 0x01;
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+		return;
+	}
+	if (stcb == NULL) {
+		sctp_audit_data[sctp_audit_indx][0] = 0xAF;
+		sctp_audit_data[sctp_audit_indx][1] = 0x02;
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+		return;
+	}
+	sctp_audit_data[sctp_audit_indx][0] = 0xA1;
+	sctp_audit_data[sctp_audit_indx][1] =
+	    (0x000000ff & stcb->asoc.sent_queue_retran_cnt);
+	sctp_audit_indx++;
+	if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+		sctp_audit_indx = 0;
+	}
+	rep = 0;
+	tot_book_cnt = 0;
+	resend_cnt = tot_out = 0;
+	TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
+		if (chk->sent == SCTP_DATAGRAM_RESEND) {
+			resend_cnt++;
+		} else if (chk->sent < SCTP_DATAGRAM_RESEND) {
+			tot_out += chk->book_size;
+			tot_book_cnt++;
+		}
+	}
+	if (resend_cnt != stcb->asoc.sent_queue_retran_cnt) {
+		sctp_audit_data[sctp_audit_indx][0] = 0xAF;
+		sctp_audit_data[sctp_audit_indx][1] = 0xA1;
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+		SCTP_PRINTF("resend_cnt:%d asoc-tot:%d\n",
+			    resend_cnt, stcb->asoc.sent_queue_retran_cnt);
+		rep = 1;
+		stcb->asoc.sent_queue_retran_cnt = resend_cnt;
+		sctp_audit_data[sctp_audit_indx][0] = 0xA2;
+		sctp_audit_data[sctp_audit_indx][1] =
+		    (0x000000ff & stcb->asoc.sent_queue_retran_cnt);
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+	}
+	if (tot_out != stcb->asoc.total_flight) {
+		sctp_audit_data[sctp_audit_indx][0] = 0xAF;
+		sctp_audit_data[sctp_audit_indx][1] = 0xA2;
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+		rep = 1;
+		SCTP_PRINTF("tot_flt:%d asoc_tot:%d\n", tot_out,
+			    (int)stcb->asoc.total_flight);
+		stcb->asoc.total_flight = tot_out;
+	}
+	if (tot_book_cnt != stcb->asoc.total_flight_count) {
+		sctp_audit_data[sctp_audit_indx][0] = 0xAF;
+		sctp_audit_data[sctp_audit_indx][1] = 0xA5;
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+		rep = 1;
+		SCTP_PRINTF("tot_flt_book:%d\n", tot_book_cnt);
+
+		stcb->asoc.total_flight_count = tot_book_cnt;
+	}
+	tot_out = 0;
+	TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
+		tot_out += lnet->flight_size;
+	}
+	if (tot_out != stcb->asoc.total_flight) {
+		sctp_audit_data[sctp_audit_indx][0] = 0xAF;
+		sctp_audit_data[sctp_audit_indx][1] = 0xA3;
+		sctp_audit_indx++;
+		if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+			sctp_audit_indx = 0;
+		}
+		rep = 1;
+		SCTP_PRINTF("real flight:%d net total was %d\n",
+			    stcb->asoc.total_flight, tot_out);
+		/* now corrective action */
+		TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
+			tot_out = 0;
+			TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
+				if ((chk->whoTo == lnet) &&
+				    (chk->sent < SCTP_DATAGRAM_RESEND)) {
+					tot_out += chk->book_size;
+				}
+			}
+			if (lnet->flight_size != tot_out) {
+				SCTP_PRINTF("net:%p flight was %d corrected to %d\n",
+					    (void *)lnet, lnet->flight_size,
+					    tot_out);
+				lnet->flight_size = tot_out;
+			}
+		}
+	}
+	if (rep) {
+		sctp_print_audit_report();
+	}
+}
+
+void
+sctp_audit_log(uint8_t ev, uint8_t fd)
+{
+
+	sctp_audit_data[sctp_audit_indx][0] = ev;
+	sctp_audit_data[sctp_audit_indx][1] = fd;
+	sctp_audit_indx++;
+	if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
+		sctp_audit_indx = 0;
+	}
+}
+
+#endif
+
+/*
+ * The conversion from time to ticks and vice versa is done by rounding
+ * upwards. This way we can test in the code the time to be positive and
+ * know that this corresponds to a positive number of ticks.
+ */
+
+uint32_t
+sctp_msecs_to_ticks(uint32_t msecs)
+{
+	uint64_t temp;
+	uint32_t ticks;
+
+	if (hz == 1000) {
+		ticks = msecs;
+	} else {
+		temp = (((uint64_t)msecs * hz) + 999) / 1000;
+		if (temp > UINT32_MAX) {
+			ticks = UINT32_MAX;
+		} else {
+			ticks = (uint32_t)temp;
+		}
+	}
+	return (ticks);
+}
+
+uint32_t
+sctp_ticks_to_msecs(uint32_t ticks)
+{
+	uint64_t temp;
+	uint32_t msecs;
+
+	if (hz == 1000) {
+		msecs = ticks;
+	} else {
+		temp = (((uint64_t)ticks * 1000) + (hz - 1)) / hz;
+		if (temp > UINT32_MAX) {
+			msecs = UINT32_MAX;
+		} else {
+			msecs = (uint32_t)temp;
+		}
+	}
+	return (msecs);
+}
+
+uint32_t
+sctp_secs_to_ticks(uint32_t secs)
+{
+	uint64_t temp;
+	uint32_t ticks;
+
+	temp = (uint64_t)secs * hz;
+	if (temp > UINT32_MAX) {
+		ticks = UINT32_MAX;
+	} else {
+		ticks = (uint32_t)temp;
+	}
+	return (ticks);
+}
+
+uint32_t
+sctp_ticks_to_secs(uint32_t ticks)
+{
+	uint64_t temp;
+	uint32_t secs;
+
+	temp = ((uint64_t)ticks + (hz - 1)) / hz;
+	if (temp > UINT32_MAX) {
+		secs = UINT32_MAX;
+	} else {
+		secs = (uint32_t)temp;
+	}
+	return (secs);
+}
+
+/*
+ * sctp_stop_timers_for_shutdown() should be called
+ * when entering the SHUTDOWN_SENT or SHUTDOWN_ACK_SENT
+ * state to make sure that all timers are stopped.
+ */
+void
+sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
+{
+	struct sctp_inpcb *inp;
+	struct sctp_nets *net;
+
+	inp = stcb->sctp_ep;
+
+	sctp_timer_stop(SCTP_TIMER_TYPE_RECV, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_12);
+	sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_13);
+	sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_14);
+	sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_15);
+	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
+		sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_16);
+		sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_17);
+	}
+}
+
+void
+sctp_stop_association_timers(struct sctp_tcb *stcb, bool stop_assoc_kill_timer)
+{
+	struct sctp_inpcb *inp;
+	struct sctp_nets *net;
+
+	inp = stcb->sctp_ep;
+	sctp_timer_stop(SCTP_TIMER_TYPE_RECV, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_18);
+	sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_19);
+	if (stop_assoc_kill_timer) {
+		sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_20);
+	}
+	sctp_timer_stop(SCTP_TIMER_TYPE_ASCONF, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_21);
+	sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_22);
+	sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNGUARD, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_23);
+	/* Mobility adaptation */
+	sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, inp, stcb, NULL,
+	                SCTP_FROM_SCTPUTIL + SCTP_LOC_24);
+	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
+		sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_25);
+		sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_26);
+		sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_27);
+		sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_28);
+		sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_29);
+		sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_30);
+		sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_31);
+	}
+}
+
+/*
+ * A list of sizes based on typical mtu's, used only if next hop size not
+ * returned. These values MUST be multiples of 4 and MUST be ordered.
+ */
+static uint32_t sctp_mtu_sizes[] = {
+	68,
+	296,
+	508,
+	512,
+	544,
+	576,
+	1004,
+	1492,
+	1500,
+	1536,
+	2000,
+	2048,
+	4352,
+	4464,
+	8168,
+	17912,
+	32000,
+	65532
+};
+
+/*
+ * Return the largest MTU in sctp_mtu_sizes smaller than val.
+ * If val is smaller than the minimum, just return the largest
+ * multiple of 4 smaller or equal to val.
+ * Ensure that the result is a multiple of 4.
+ */
+uint32_t
+sctp_get_prev_mtu(uint32_t val)
+{
+	uint32_t i;
+
+	val &= 0xfffffffc;
+	if (val <= sctp_mtu_sizes[0]) {
+		return (val);
+	}
+	for (i = 1; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
+		if (val <= sctp_mtu_sizes[i]) {
+			break;
+		}
+	}
+	KASSERT((sctp_mtu_sizes[i - 1] & 0x00000003) == 0,
+	        ("sctp_mtu_sizes[%u] not a multiple of 4", i - 1));
+	return (sctp_mtu_sizes[i - 1]);
+}
+
+/*
+ * Return the smallest MTU in sctp_mtu_sizes larger than val.
+ * If val is larger than the maximum, just return the largest multiple of 4 smaller
+ * or equal to val.
+ * Ensure that the result is a multiple of 4.
+ */
+uint32_t
+sctp_get_next_mtu(uint32_t val)
+{
+	/* select another MTU that is just bigger than this one */
+	uint32_t i;
+
+	val &= 0xfffffffc;
+	for (i = 0; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
+		if (val < sctp_mtu_sizes[i]) {
+			KASSERT((sctp_mtu_sizes[i] & 0x00000003) == 0,
+				("sctp_mtu_sizes[%u] not a multiple of 4", i));
+			return (sctp_mtu_sizes[i]);
+		}
+	}
+	return (val);
+}
+
+void
+sctp_fill_random_store(struct sctp_pcb *m)
+{
+	/*
+	 * Here we use the MD5/SHA-1 to hash with our good randomNumbers and
+	 * our counter. The result becomes our good random numbers and we
+	 * then setup to give these out. Note that we do no locking to
+	 * protect this. This is ok, since if competing folks call this we
+	 * will get more gobbled gook in the random store which is what we
+	 * want. There is a danger that two guys will use the same random
+	 * numbers, but thats ok too since that is random as well :->
+	 */
+	m->store_at = 0;
+#if defined(__Userspace__) && defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
+	for (int i = 0; i < (int) (sizeof(m->random_store) / sizeof(m->random_store[0])); i++) {
+		m->random_store[i] = (uint8_t) rand();
+	}
+#else
+	(void)sctp_hmac(SCTP_HMAC, (uint8_t *)m->random_numbers,
+	    sizeof(m->random_numbers), (uint8_t *)&m->random_counter,
+	    sizeof(m->random_counter), (uint8_t *)m->random_store);
+#endif
+	m->random_counter++;
+}
+
+uint32_t
+sctp_select_initial_TSN(struct sctp_pcb *inp)
+{
+	/*
+	 * A true implementation should use random selection process to get
+	 * the initial stream sequence number, using RFC1750 as a good
+	 * guideline
+	 */
+	uint32_t x, *xp;
+	uint8_t *p;
+	int store_at, new_store;
+
+	if (inp->initial_sequence_debug != 0) {
+		uint32_t ret;
+
+		ret = inp->initial_sequence_debug;
+		inp->initial_sequence_debug++;
+		return (ret);
+	}
+ retry:
+	store_at = inp->store_at;
+	new_store = store_at + sizeof(uint32_t);
+	if (new_store >= (SCTP_SIGNATURE_SIZE-3)) {
+		new_store = 0;
+	}
+	if (!atomic_cmpset_int(&inp->store_at, store_at, new_store)) {
+		goto retry;
+	}
+	if (new_store == 0) {
+		/* Refill the random store */
+		sctp_fill_random_store(inp);
+	}
+	p = &inp->random_store[store_at];
+	xp = (uint32_t *)p;
+	x = *xp;
+	return (x);
+}
+
+uint32_t
+sctp_select_a_tag(struct sctp_inpcb *inp, uint16_t lport, uint16_t rport, int check)
+{
+	uint32_t x;
+	struct timeval now;
+
+	if (check) {
+		(void)SCTP_GETTIME_TIMEVAL(&now);
+	}
+	for (;;) {
+		x = sctp_select_initial_TSN(&inp->sctp_ep);
+		if (x == 0) {
+			/* we never use 0 */
+			continue;
+		}
+		if (!check || sctp_is_vtag_good(x, lport, rport, &now)) {
+			break;
+		}
+	}
+	return (x);
+}
+
+int32_t
+sctp_map_assoc_state(int kernel_state)
+{
+	int32_t user_state;
+
+	if (kernel_state & SCTP_STATE_WAS_ABORTED) {
+		user_state = SCTP_CLOSED;
+	} else if (kernel_state & SCTP_STATE_SHUTDOWN_PENDING) {
+		user_state = SCTP_SHUTDOWN_PENDING;
+	} else {
+		switch (kernel_state & SCTP_STATE_MASK) {
+		case SCTP_STATE_EMPTY:
+			user_state = SCTP_CLOSED;
+			break;
+		case SCTP_STATE_INUSE:
+			user_state = SCTP_CLOSED;
+			break;
+		case SCTP_STATE_COOKIE_WAIT:
+			user_state = SCTP_COOKIE_WAIT;
+			break;
+		case SCTP_STATE_COOKIE_ECHOED:
+			user_state = SCTP_COOKIE_ECHOED;
+			break;
+		case SCTP_STATE_OPEN:
+			user_state = SCTP_ESTABLISHED;
+			break;
+		case SCTP_STATE_SHUTDOWN_SENT:
+			user_state = SCTP_SHUTDOWN_SENT;
+			break;
+		case SCTP_STATE_SHUTDOWN_RECEIVED:
+			user_state = SCTP_SHUTDOWN_RECEIVED;
+			break;
+		case SCTP_STATE_SHUTDOWN_ACK_SENT:
+			user_state = SCTP_SHUTDOWN_ACK_SENT;
+			break;
+		default:
+			user_state = SCTP_CLOSED;
+			break;
+		}
+	}
+	return (user_state);
+}
+
+int
+sctp_init_asoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+               uint32_t override_tag, uint32_t initial_tsn, uint32_t vrf_id,
+               uint16_t o_strms)
+{
+	struct sctp_association *asoc;
+	/*
+	 * Anything set to zero is taken care of by the allocation routine's
+	 * bzero
+	 */
+
+	/*
+	 * Up front select what scoping to apply on addresses I tell my peer
+	 * Not sure what to do with these right now, we will need to come up
+	 * with a way to set them. We may need to pass them through from the
+	 * caller in the sctp_aloc_assoc() function.
+	 */
+	int i;
+#if defined(SCTP_DETAILED_STR_STATS)
+	int j;
+#endif
+
+	asoc = &stcb->asoc;
+	/* init all variables to a known value. */
+	SCTP_SET_STATE(stcb, SCTP_STATE_INUSE);
+	asoc->max_burst = inp->sctp_ep.max_burst;
+	asoc->fr_max_burst = inp->sctp_ep.fr_max_burst;
+	asoc->heart_beat_delay = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]);
+	asoc->cookie_life = inp->sctp_ep.def_cookie_life;
+	asoc->sctp_cmt_on_off = inp->sctp_cmt_on_off;
+	asoc->ecn_supported = inp->ecn_supported;
+	asoc->prsctp_supported = inp->prsctp_supported;
+	asoc->auth_supported = inp->auth_supported;
+	asoc->asconf_supported = inp->asconf_supported;
+	asoc->reconfig_supported = inp->reconfig_supported;
+	asoc->nrsack_supported = inp->nrsack_supported;
+	asoc->pktdrop_supported = inp->pktdrop_supported;
+	asoc->idata_supported = inp->idata_supported;
+	asoc->rcv_edmid = inp->rcv_edmid;
+	asoc->snd_edmid = SCTP_EDMID_NONE;
+	asoc->sctp_cmt_pf = (uint8_t)0;
+	asoc->sctp_frag_point = inp->sctp_frag_point;
+	asoc->sctp_features = inp->sctp_features;
+	asoc->default_dscp = inp->sctp_ep.default_dscp;
+	asoc->max_cwnd = inp->max_cwnd;
+#ifdef INET6
+	if (inp->sctp_ep.default_flowlabel) {
+		asoc->default_flowlabel = inp->sctp_ep.default_flowlabel;
+	} else {
+		if (inp->ip_inp.inp.inp_flags & IN6P_AUTOFLOWLABEL) {
+			asoc->default_flowlabel = sctp_select_initial_TSN(&inp->sctp_ep);
+			asoc->default_flowlabel &= 0x000fffff;
+			asoc->default_flowlabel |= 0x80000000;
+		} else {
+			asoc->default_flowlabel = 0;
+		}
+	}
+#endif
+	asoc->sb_send_resv = 0;
+	if (override_tag) {
+		asoc->my_vtag = override_tag;
+	} else {
+		asoc->my_vtag = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport,  1);
+	}
+	/* Get the nonce tags */
+	asoc->my_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
+	asoc->peer_vtag_nonce = sctp_select_a_tag(inp, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
+	asoc->vrf_id = vrf_id;
+
+#ifdef SCTP_ASOCLOG_OF_TSNS
+	asoc->tsn_in_at = 0;
+	asoc->tsn_out_at = 0;
+	asoc->tsn_in_wrapped = 0;
+	asoc->tsn_out_wrapped = 0;
+	asoc->cumack_log_at = 0;
+	asoc->cumack_log_atsnt = 0;
+#endif
+#ifdef SCTP_FS_SPEC_LOG
+	asoc->fs_index = 0;
+#endif
+	asoc->refcnt = 0;
+	asoc->assoc_up_sent = 0;
+	if (override_tag) {
+		asoc->init_seq_number = initial_tsn;
+	} else {
+		asoc->init_seq_number = sctp_select_initial_TSN(&inp->sctp_ep);
+	}
+	asoc->asconf_seq_out = asoc->init_seq_number;
+	asoc->str_reset_seq_out = asoc->init_seq_number;
+	asoc->sending_seq = asoc->init_seq_number;
+	asoc->asconf_seq_out_acked = asoc->init_seq_number - 1;
+	/* we are optimistic here */
+	asoc->peer_supports_nat = 0;
+	asoc->sent_queue_retran_cnt = 0;
+
+	/* for CMT */
+	asoc->last_net_cmt_send_started = NULL;
+
+	asoc->last_acked_seq = asoc->init_seq_number - 1;
+	asoc->advanced_peer_ack_point = asoc->init_seq_number - 1;
+	asoc->asconf_seq_in = asoc->init_seq_number - 1;
+
+	/* here we are different, we hold the next one we expect */
+	asoc->str_reset_seq_in = asoc->init_seq_number;
+
+	asoc->initial_init_rto_max = inp->sctp_ep.initial_init_rto_max;
+	asoc->initial_rto = inp->sctp_ep.initial_rto;
+
+	asoc->default_mtu = inp->sctp_ep.default_mtu;
+	asoc->max_init_times = inp->sctp_ep.max_init_times;
+	asoc->max_send_times = inp->sctp_ep.max_send_times;
+	asoc->def_net_failure = inp->sctp_ep.def_net_failure;
+	asoc->def_net_pf_threshold = inp->sctp_ep.def_net_pf_threshold;
+	asoc->free_chunk_cnt = 0;
+
+	asoc->iam_blocking = 0;
+	asoc->context = inp->sctp_context;
+	asoc->local_strreset_support = inp->local_strreset_support;
+	asoc->def_send = inp->def_send;
+	asoc->delayed_ack = sctp_ticks_to_msecs(inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]);
+	asoc->sack_freq = inp->sctp_ep.sctp_sack_freq;
+	asoc->pr_sctp_cnt = 0;
+	asoc->total_output_queue_size = 0;
+
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+		asoc->scope.ipv6_addr_legal = 1;
+		if (SCTP_IPV6_V6ONLY(inp) == 0) {
+			asoc->scope.ipv4_addr_legal = 1;
+		} else {
+			asoc->scope.ipv4_addr_legal = 0;
+		}
+#if defined(__Userspace__)
+			asoc->scope.conn_addr_legal = 0;
+#endif
+	} else {
+		asoc->scope.ipv6_addr_legal = 0;
+#if defined(__Userspace__)
+		if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) {
+			asoc->scope.conn_addr_legal = 1;
+			asoc->scope.ipv4_addr_legal = 0;
+		} else {
+			asoc->scope.conn_addr_legal = 0;
+			asoc->scope.ipv4_addr_legal = 1;
+		}
+#else
+		asoc->scope.ipv4_addr_legal = 1;
+#endif
+	}
+
+	asoc->my_rwnd = max(SCTP_SB_LIMIT_RCV(inp->sctp_socket), SCTP_MINIMAL_RWND);
+	asoc->peers_rwnd = SCTP_SB_LIMIT_RCV(inp->sctp_socket);
+
+	asoc->smallest_mtu = 0;
+	asoc->minrto = inp->sctp_ep.sctp_minrto;
+	asoc->maxrto = inp->sctp_ep.sctp_maxrto;
+
+	asoc->stream_locked_on = 0;
+	asoc->ecn_echo_cnt_onq = 0;
+	asoc->stream_locked = 0;
+
+	asoc->send_sack = 1;
+
+	LIST_INIT(&asoc->sctp_restricted_addrs);
+
+	TAILQ_INIT(&asoc->nets);
+	TAILQ_INIT(&asoc->pending_reply_queue);
+	TAILQ_INIT(&asoc->asconf_ack_sent);
+	/* Setup to fill the hb random cache at first HB */
+	asoc->hb_random_idx = 4;
+
+	asoc->sctp_autoclose_ticks = inp->sctp_ep.auto_close_time;
+
+	stcb->asoc.congestion_control_module = inp->sctp_ep.sctp_default_cc_module;
+	stcb->asoc.cc_functions = sctp_cc_functions[inp->sctp_ep.sctp_default_cc_module];
+
+	stcb->asoc.stream_scheduling_module = inp->sctp_ep.sctp_default_ss_module;
+	stcb->asoc.ss_functions = sctp_ss_functions[inp->sctp_ep.sctp_default_ss_module];
+
+	/*
+	 * Now the stream parameters, here we allocate space for all streams
+	 * that we request by default.
+	 */
+	asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams =
+	    o_strms;
+	SCTP_MALLOC(asoc->strmout, struct sctp_stream_out *,
+		    asoc->streamoutcnt * sizeof(struct sctp_stream_out),
+		    SCTP_M_STRMO);
+	if (asoc->strmout == NULL) {
+		/* big trouble no memory */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
+		return (ENOMEM);
+	}
+	SCTP_TCB_LOCK(stcb);
+	for (i = 0; i < asoc->streamoutcnt; i++) {
+		/*
+		 * inbound side must be set to 0xffff, also NOTE when we get
+		 * the INIT-ACK back (for INIT sender) we MUST reduce the
+		 * count (streamoutcnt) but first check if we sent to any of
+		 * the upper streams that were dropped (if some were). Those
+		 * that were dropped must be notified to the upper layer as
+		 * failed to send.
+		 */
+		TAILQ_INIT(&asoc->strmout[i].outqueue);
+		asoc->ss_functions.sctp_ss_init_stream(stcb, &asoc->strmout[i], NULL);
+		asoc->strmout[i].chunks_on_queues = 0;
+#if defined(SCTP_DETAILED_STR_STATS)
+		for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
+			asoc->strmout[i].abandoned_sent[j] = 0;
+			asoc->strmout[i].abandoned_unsent[j] = 0;
+		}
+#else
+		asoc->strmout[i].abandoned_sent[0] = 0;
+		asoc->strmout[i].abandoned_unsent[0] = 0;
+#endif
+		asoc->strmout[i].next_mid_ordered = 0;
+		asoc->strmout[i].next_mid_unordered = 0;
+		asoc->strmout[i].sid = i;
+		asoc->strmout[i].last_msg_incomplete = 0;
+		asoc->strmout[i].state = SCTP_STREAM_OPENING;
+	}
+	asoc->ss_functions.sctp_ss_init(stcb, asoc);
+	SCTP_TCB_UNLOCK(stcb);
+
+	/* Now the mapping array */
+	asoc->mapping_array_size = SCTP_INITIAL_MAPPING_ARRAY;
+	SCTP_MALLOC(asoc->mapping_array, uint8_t *, asoc->mapping_array_size,
+		    SCTP_M_MAP);
+	if (asoc->mapping_array == NULL) {
+		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
+		return (ENOMEM);
+	}
+	memset(asoc->mapping_array, 0, asoc->mapping_array_size);
+	SCTP_MALLOC(asoc->nr_mapping_array, uint8_t *, asoc->mapping_array_size,
+	    SCTP_M_MAP);
+	if (asoc->nr_mapping_array == NULL) {
+		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
+		SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
+		return (ENOMEM);
+	}
+	memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
+
+	/* Now the init of the other outqueues */
+	TAILQ_INIT(&asoc->free_chunks);
+	TAILQ_INIT(&asoc->control_send_queue);
+	TAILQ_INIT(&asoc->asconf_send_queue);
+	TAILQ_INIT(&asoc->send_queue);
+	TAILQ_INIT(&asoc->sent_queue);
+	TAILQ_INIT(&asoc->resetHead);
+	asoc->max_inbound_streams = inp->sctp_ep.max_open_streams_intome;
+	TAILQ_INIT(&asoc->asconf_queue);
+	/* authentication fields */
+	asoc->authinfo.random = NULL;
+	asoc->authinfo.active_keyid = 0;
+	asoc->authinfo.assoc_key = NULL;
+	asoc->authinfo.assoc_keyid = 0;
+	asoc->authinfo.recv_key = NULL;
+	asoc->authinfo.recv_keyid = 0;
+	LIST_INIT(&asoc->shared_keys);
+	asoc->marked_retrans = 0;
+	asoc->port = inp->sctp_ep.port;
+	asoc->timoinit = 0;
+	asoc->timodata = 0;
+	asoc->timosack = 0;
+	asoc->timoshutdown = 0;
+	asoc->timoheartbeat = 0;
+	asoc->timocookie = 0;
+	asoc->timoshutdownack = 0;
+	(void)SCTP_GETTIME_TIMEVAL(&asoc->start_time);
+	asoc->discontinuity_time = asoc->start_time;
+	for (i = 0; i < SCTP_PR_SCTP_MAX + 1; i++) {
+		asoc->abandoned_unsent[i] = 0;
+		asoc->abandoned_sent[i] = 0;
+	}
+	/* sa_ignore MEMLEAK {memory is put in the assoc mapping array and freed later when
+	 * the association is freed.
+	 */
+	return (0);
+}
+
+void
+sctp_print_mapping_array(struct sctp_association *asoc)
+{
+	unsigned int i, limit;
+
+	SCTP_PRINTF("Mapping array size: %d, baseTSN: %8.8x, cumAck: %8.8x, highestTSN: (%8.8x, %8.8x).\n",
+	            asoc->mapping_array_size,
+	            asoc->mapping_array_base_tsn,
+	            asoc->cumulative_tsn,
+	            asoc->highest_tsn_inside_map,
+	            asoc->highest_tsn_inside_nr_map);
+	for (limit = asoc->mapping_array_size; limit > 1; limit--) {
+		if (asoc->mapping_array[limit - 1] != 0) {
+			break;
+		}
+	}
+	SCTP_PRINTF("Renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
+	for (i = 0; i < limit; i++) {
+		SCTP_PRINTF("%2.2x%c", asoc->mapping_array[i], ((i + 1) % 16) ? ' ' : '\n');
+	}
+	if (limit % 16)
+		SCTP_PRINTF("\n");
+	for (limit = asoc->mapping_array_size; limit > 1; limit--) {
+		if (asoc->nr_mapping_array[limit - 1]) {
+			break;
+		}
+	}
+	SCTP_PRINTF("Non renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
+	for (i = 0; i < limit; i++) {
+		SCTP_PRINTF("%2.2x%c", asoc->nr_mapping_array[i], ((i + 1) % 16) ? ' ': '\n');
+	}
+	if (limit % 16)
+		SCTP_PRINTF("\n");
+}
+
+int
+sctp_expand_mapping_array(struct sctp_association *asoc, uint32_t needed)
+{
+	/* mapping array needs to grow */
+	uint8_t *new_array1, *new_array2;
+	uint32_t new_size;
+
+	new_size = asoc->mapping_array_size + ((needed+7)/8 + SCTP_MAPPING_ARRAY_INCR);
+	SCTP_MALLOC(new_array1, uint8_t *, new_size, SCTP_M_MAP);
+	SCTP_MALLOC(new_array2, uint8_t *, new_size, SCTP_M_MAP);
+	if ((new_array1 == NULL) || (new_array2 == NULL)) {
+		/* can't get more, forget it */
+		SCTP_PRINTF("No memory for expansion of SCTP mapping array %d\n", new_size);
+		if (new_array1) {
+			SCTP_FREE(new_array1, SCTP_M_MAP);
+		}
+		if (new_array2) {
+			SCTP_FREE(new_array2, SCTP_M_MAP);
+		}
+		return (-1);
+	}
+	memset(new_array1, 0, new_size);
+	memset(new_array2, 0, new_size);
+	memcpy(new_array1, asoc->mapping_array, asoc->mapping_array_size);
+	memcpy(new_array2, asoc->nr_mapping_array, asoc->mapping_array_size);
+	SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
+	SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
+	asoc->mapping_array = new_array1;
+	asoc->nr_mapping_array = new_array2;
+	asoc->mapping_array_size = new_size;
+	return (0);
+}
+
+static void
+sctp_iterator_work(struct sctp_iterator *it)
+{
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	struct epoch_tracker et;
+#endif
+	struct sctp_inpcb *tinp;
+	int iteration_count = 0;
+	int inp_skip = 0;
+	int first_in = 1;
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	NET_EPOCH_ENTER(et);
+#endif
+	SCTP_INP_INFO_RLOCK();
+	SCTP_ITERATOR_LOCK();
+	sctp_it_ctl.cur_it = it;
+	if (it->inp) {
+		SCTP_INP_RLOCK(it->inp);
+		SCTP_INP_DECR_REF(it->inp);
+	}
+	if (it->inp == NULL) {
+		/* iterator is complete */
+done_with_iterator:
+		sctp_it_ctl.cur_it = NULL;
+		SCTP_ITERATOR_UNLOCK();
+		SCTP_INP_INFO_RUNLOCK();
+		if (it->function_atend != NULL) {
+			(*it->function_atend) (it->pointer, it->val);
+		}
+		SCTP_FREE(it, SCTP_M_ITER);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		NET_EPOCH_EXIT(et);
+#endif
+		return;
+	}
+select_a_new_ep:
+	if (first_in) {
+		first_in = 0;
+	} else {
+		SCTP_INP_RLOCK(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_RUNLOCK(it->inp);
+			goto done_with_iterator;
+		}
+		tinp = it->inp;
+		it->inp = LIST_NEXT(it->inp, sctp_list);
+		it->stcb = NULL;
+		SCTP_INP_RUNLOCK(tinp);
+		if (it->inp == NULL) {
+			goto done_with_iterator;
+		}
+		SCTP_INP_RLOCK(it->inp);
+	}
+	/* now go through each assoc which is in the desired state */
+	if (it->done_current_ep == 0) {
+		if (it->function_inp != NULL)
+			inp_skip = (*it->function_inp)(it->inp, it->pointer, it->val);
+		it->done_current_ep = 1;
+	}
+	if (it->stcb == NULL) {
+		/* run the per instance function */
+		it->stcb = LIST_FIRST(&it->inp->sctp_asoc_list);
+	}
+	if ((inp_skip) || it->stcb == NULL) {
+		if (it->function_inp_end != NULL) {
+			inp_skip = (*it->function_inp_end)(it->inp,
+							   it->pointer,
+							   it->val);
+		}
+		SCTP_INP_RUNLOCK(it->inp);
+		goto no_stcb;
+	}
+	while (it->stcb != NULL) {
+		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;
+		}
+		/* see if we have limited out the iterator loop */
+		iteration_count++;
+		if (iteration_count > SCTP_ITERATOR_MAX_AT_ONCE) {
+			/* Pause to let others grab the lock */
+			atomic_add_int(&it->stcb->asoc.refcnt, 1);
+			SCTP_TCB_UNLOCK(it->stcb);
+			SCTP_INP_INCR_REF(it->inp);
+			SCTP_INP_RUNLOCK(it->inp);
+			SCTP_ITERATOR_UNLOCK();
+			SCTP_INP_INFO_RUNLOCK();
+			SCTP_INP_INFO_RLOCK();
+			SCTP_ITERATOR_LOCK();
+			if (sctp_it_ctl.iterator_flags) {
+				/* We won't be staying here */
+				SCTP_INP_DECR_REF(it->inp);
+				atomic_subtract_int(&it->stcb->asoc.refcnt, 1);
+#if !(defined(__FreeBSD__) && !defined(__Userspace__))
+				if (sctp_it_ctl.iterator_flags &
+				   SCTP_ITERATOR_MUST_EXIT) {
+					goto done_with_iterator;
+				}
+#endif
+				if (sctp_it_ctl.iterator_flags &
+				   SCTP_ITERATOR_STOP_CUR_IT) {
+					sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_IT;
+					goto done_with_iterator;
+				}
+				if (sctp_it_ctl.iterator_flags &
+				   SCTP_ITERATOR_STOP_CUR_INP) {
+					sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_INP;
+					goto no_stcb;
+				}
+				/* If we reach here huh? */
+				SCTP_PRINTF("Unknown it ctl flag %x\n",
+					    sctp_it_ctl.iterator_flags);
+				sctp_it_ctl.iterator_flags = 0;
+			}
+			SCTP_INP_RLOCK(it->inp);
+			SCTP_INP_DECR_REF(it->inp);
+			SCTP_TCB_LOCK(it->stcb);
+			atomic_subtract_int(&it->stcb->asoc.refcnt, 1);
+			iteration_count = 0;
+		}
+		KASSERT(it->inp == it->stcb->sctp_ep,
+		        ("%s: stcb %p does not belong to inp %p, but inp %p",
+		         __func__, it->stcb, it->inp, it->stcb->sctp_ep));
+		SCTP_INP_RLOCK_ASSERT(it->inp);
+		SCTP_TCB_LOCK_ASSERT(it->stcb);
+
+		/* run function on this one */
+		(*it->function_assoc)(it->inp, it->stcb, it->pointer, it->val);
+		SCTP_INP_RLOCK_ASSERT(it->inp);
+		SCTP_TCB_LOCK_ASSERT(it->stcb);
+
+		/*
+		 * 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_SO_NOT_LOCKED);
+			SCTP_INP_RLOCK_ASSERT(it->inp);
+			SCTP_TCB_LOCK_ASSERT(it->stcb);
+		}
+
+		SCTP_TCB_UNLOCK(it->stcb);
+	next_assoc:
+		it->stcb = LIST_NEXT(it->stcb, sctp_tcblist);
+		if (it->stcb == NULL) {
+			/* Run last function */
+			if (it->function_inp_end != NULL) {
+				inp_skip = (*it->function_inp_end)(it->inp,
+								   it->pointer,
+								   it->val);
+			}
+		}
+	}
+	SCTP_INP_RUNLOCK(it->inp);
+ no_stcb:
+	/* done with all assocs on this endpoint, move on to next endpoint */
+	it->done_current_ep = 0;
+	if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
+		it->inp = NULL;
+	} else {
+		it->inp = LIST_NEXT(it->inp, sctp_list);
+	}
+	it->stcb = NULL;
+	if (it->inp == NULL) {
+		goto done_with_iterator;
+	}
+	goto select_a_new_ep;
+}
+
+void
+sctp_iterator_worker(void)
+{
+	struct sctp_iterator *it;
+
+	/* This function is called with the WQ lock in place */
+	sctp_it_ctl.iterator_running = 1;
+	while ((it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead)) != NULL) {
+		/* now lets work on this one */
+		TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
+		SCTP_IPI_ITERATOR_WQ_UNLOCK();
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		CURVNET_SET(it->vn);
+#endif
+		sctp_iterator_work(it);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		CURVNET_RESTORE();
+#endif
+		SCTP_IPI_ITERATOR_WQ_LOCK();
+#if !defined(__FreeBSD__) && !defined(__Userspace__)
+		if (sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) {
+			break;
+		}
+#endif
+		/*sa_ignore FREED_MEMORY*/
+	}
+	sctp_it_ctl.iterator_running = 0;
+	return;
+}
+
+static void
+sctp_handle_addr_wq(void)
+{
+	/* deal with the ADDR wq from the rtsock calls */
+	struct sctp_laddr *wi, *nwi;
+	struct sctp_asconf_iterator *asc;
+
+	SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
+		    sizeof(struct sctp_asconf_iterator), SCTP_M_ASC_IT);
+	if (asc == NULL) {
+		/* Try later, no memory */
+		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
+				 (struct sctp_inpcb *)NULL,
+				 (struct sctp_tcb *)NULL,
+				 (struct sctp_nets *)NULL);
+		return;
+	}
+	LIST_INIT(&asc->list_of_work);
+	asc->cnt = 0;
+
+	LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
+		LIST_REMOVE(wi, sctp_nxt_addr);
+		LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
+		asc->cnt++;
+	}
+
+	if (asc->cnt == 0) {
+		SCTP_FREE(asc, SCTP_M_ASC_IT);
+	} else {
+		int ret;
+
+		ret = sctp_initiate_iterator(sctp_asconf_iterator_ep,
+		                             sctp_asconf_iterator_stcb,
+		                             NULL, /* No ep end for boundall */
+		                             SCTP_PCB_FLAGS_BOUNDALL,
+		                             SCTP_PCB_ANY_FEATURES,
+		                             SCTP_ASOC_ANY_STATE,
+		                             (void *)asc, 0,
+		                             sctp_asconf_iterator_end, NULL, 0);
+		if (ret) {
+			SCTP_PRINTF("Failed to initiate iterator for handle_addr_wq\n");
+			/* Freeing if we are stopping or put back on the addr_wq. */
+			if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
+				sctp_asconf_iterator_end(asc, 0);
+			} else {
+				LIST_FOREACH(wi, &asc->list_of_work, sctp_nxt_addr) {
+					LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
+				}
+				SCTP_FREE(asc, SCTP_M_ASC_IT);
+			}
+		}
+	}
+}
+
+/*-
+ * The following table shows which pointers for the inp, stcb, or net are
+ * stored for each timer after it was started.
+ *
+ *|Name                         |Timer                        |inp |stcb|net |
+ *|-----------------------------|-----------------------------|----|----|----|
+ *|SCTP_TIMER_TYPE_SEND         |net->rxt_timer               |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_INIT         |net->rxt_timer               |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_RECV         |stcb->asoc.dack_timer        |Yes |Yes |No  |
+ *|SCTP_TIMER_TYPE_SHUTDOWN     |net->rxt_timer               |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_HEARTBEAT    |net->hb_timer                |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_COOKIE       |net->rxt_timer               |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_NEWCOOKIE    |inp->sctp_ep.signature_change|Yes |No  |No  |
+ *|SCTP_TIMER_TYPE_PATHMTURAISE |net->pmtu_timer              |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_SHUTDOWNACK  |net->rxt_timer               |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_ASCONF       |stcb->asoc.asconf_timer      |Yes |Yes |Yes |
+ *|SCTP_TIMER_TYPE_SHUTDOWNGUARD|stcb->asoc.shut_guard_timer  |Yes |Yes |No  |
+ *|SCTP_TIMER_TYPE_AUTOCLOSE    |stcb->asoc.autoclose_timer   |Yes |Yes |No  |
+ *|SCTP_TIMER_TYPE_STRRESET     |stcb->asoc.strreset_timer    |Yes |Yes |No  |
+ *|SCTP_TIMER_TYPE_INPKILL      |inp->sctp_ep.signature_change|Yes |No  |No  |
+ *|SCTP_TIMER_TYPE_ASOCKILL     |stcb->asoc.strreset_timer    |Yes |Yes |No  |
+ *|SCTP_TIMER_TYPE_ADDR_WQ      |SCTP_BASE_INFO(addr_wq_timer)|No  |No  |No  |
+ *|SCTP_TIMER_TYPE_PRIM_DELETED |stcb->asoc.delete_prim_timer |Yes |Yes |No  |
+ */
+
+void
+sctp_timeout_handler(void *t)
+{
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	struct epoch_tracker et;
+#endif
+	struct timeval tv;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+	struct sctp_nets *net;
+	struct sctp_timer *tmr;
+	struct mbuf *op_err;
+#if defined(__APPLE__) && !defined(__Userspace__)
+	struct socket *so;
+#endif
+#if defined(__Userspace__)
+	struct socket *upcall_socket = NULL;
+#endif
+	int type;
+	int i, secret;
+	bool did_output, released_asoc_reference;
+
+	/*
+	 * If inp, stcb or net are not NULL, then references to these were
+	 * added when the timer was started, and must be released before this
+	 * function returns.
+	 */
+	tmr = (struct sctp_timer *)t;
+	inp = (struct sctp_inpcb *)tmr->ep;
+	stcb = (struct sctp_tcb *)tmr->tcb;
+	net = (struct sctp_nets *)tmr->net;
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	CURVNET_SET((struct vnet *)tmr->vnet);
+	NET_EPOCH_ENTER(et);
+#endif
+	released_asoc_reference = false;
+
+#ifdef SCTP_AUDITING_ENABLED
+	sctp_audit_log(0xF0, (uint8_t) tmr->type);
+	sctp_auditing(3, inp, stcb, net);
+#endif
+
+	/* sanity checks... */
+	KASSERT(tmr->self == NULL || tmr->self == tmr,
+	        ("sctp_timeout_handler: tmr->self corrupted"));
+	KASSERT(SCTP_IS_TIMER_TYPE_VALID(tmr->type),
+	        ("sctp_timeout_handler: invalid timer type %d", tmr->type));
+	type = tmr->type;
+	KASSERT(stcb == NULL || stcb->sctp_ep == inp,
+	        ("sctp_timeout_handler of type %d: inp = %p, stcb->sctp_ep %p",
+	         type, stcb, stcb->sctp_ep));
+	tmr->stopped_from = 0xa001;
+	if ((stcb != NULL) && (stcb->asoc.state == SCTP_STATE_EMPTY)) {
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Timer type %d handler exiting due to CLOSED association.\n",
+		        type);
+		goto out_decr;
+	}
+	tmr->stopped_from = 0xa002;
+	SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d goes off.\n", type);
+	if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+			"Timer type %d handler exiting due to not being active.\n",
+			type);
+		goto out_decr;
+	}
+
+	tmr->stopped_from = 0xa003;
+	if (stcb) {
+		SCTP_TCB_LOCK(stcb);
+		/*
+		 * Release reference so that association can be freed if
+		 * necessary below.
+		 * This is safe now that we have acquired the lock.
+		 */
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+		released_asoc_reference = true;
+		if ((type != SCTP_TIMER_TYPE_ASOCKILL) &&
+		    ((stcb->asoc.state == SCTP_STATE_EMPTY) ||
+		     (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED))) {
+			SCTPDBG(SCTP_DEBUG_TIMER2,
+			        "Timer type %d handler exiting due to CLOSED association.\n",
+			        type);
+			goto out;
+		}
+	} else if (inp != NULL) {
+		SCTP_INP_WLOCK(inp);
+	} else {
+		SCTP_WQ_ADDR_LOCK();
+	}
+
+	/* Record in stopped_from which timeout occurred. */
+	tmr->stopped_from = type;
+	/* mark as being serviced now */
+	if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
+		/*
+		 * Callout has been rescheduled.
+		 */
+		goto out;
+	}
+	if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
+		/*
+		 * Not active, so no action.
+		 */
+		goto out;
+	}
+	SCTP_OS_TIMER_DEACTIVATE(&tmr->timer);
+
+#if defined(__Userspace__)
+	if ((stcb != NULL) &&
+	    ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
+	    (stcb->sctp_socket != NULL)) {
+		upcall_socket = stcb->sctp_socket;
+		SOCK_LOCK(upcall_socket);
+		soref(upcall_socket);
+		SOCK_UNLOCK(upcall_socket);
+	}
+#endif
+	/* call the handler for the appropriate timer type */
+	switch (type) {
+	case SCTP_TIMER_TYPE_SEND:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timodata);
+		stcb->asoc.timodata++;
+		stcb->asoc.num_send_timers_up--;
+		if (stcb->asoc.num_send_timers_up < 0) {
+			stcb->asoc.num_send_timers_up = 0;
+		}
+		SCTP_TCB_LOCK_ASSERT(stcb);
+		if (sctp_t3rxt_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+
+			goto out_decr;
+		}
+		SCTP_TCB_LOCK_ASSERT(stcb);
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, net);
+#endif
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		if ((stcb->asoc.num_send_timers_up == 0) &&
+		    (stcb->asoc.sent_queue_cnt > 0)) {
+			struct sctp_tmit_chunk *chk;
+
+			/*
+			 * Safeguard. If there on some on the sent queue
+			 * somewhere but no timers running something is
+			 * wrong... so we start a timer on the first chunk
+			 * on the send queue on whatever net it is sent to.
+			 */
+			TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
+				if (chk->whoTo != NULL) {
+					break;
+				}
+			}
+			if (chk != NULL) {
+				sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
+			}
+		}
+		break;
+	case SCTP_TIMER_TYPE_INIT:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoinit);
+		stcb->asoc.timoinit++;
+		if (sctp_t1init_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+		did_output = false;
+		break;
+	case SCTP_TIMER_TYPE_RECV:
+		KASSERT(inp != NULL && stcb != NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timosack);
+		stcb->asoc.timosack++;
+		sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, NULL);
+#endif
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SACK_TMR, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWN:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoshutdown);
+		stcb->asoc.timoshutdown++;
+		if (sctp_shutdown_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, net);
+#endif
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_HEARTBEAT:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoheartbeat);
+		stcb->asoc.timoheartbeat++;
+		if (sctp_heartbeat_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, net);
+#endif
+		if ((net->dest_state & SCTP_ADDR_NOHB) == 0) {
+			sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net);
+			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_HB_TMR, SCTP_SO_NOT_LOCKED);
+			did_output = true;
+		} else {
+			did_output = false;
+		}
+		break;
+	case SCTP_TIMER_TYPE_COOKIE:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timocookie);
+		stcb->asoc.timocookie++;
+		if (sctp_cookie_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, net);
+#endif
+		/*
+		 * We consider T3 and Cookie timer pretty much the same with
+		 * respect to where from in chunk_output.
+		 */
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_NEWCOOKIE:
+		KASSERT(inp != NULL && stcb == NULL && net == NULL,
+			("timeout of type %d: inp = %p, stcb = %p, net = %p",
+			 type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timosecret);
+		(void)SCTP_GETTIME_TIMEVAL(&tv);
+		inp->sctp_ep.time_of_secret_change = (unsigned int)tv.tv_sec;
+		inp->sctp_ep.last_secret_number =
+		    inp->sctp_ep.current_secret_number;
+		inp->sctp_ep.current_secret_number++;
+		if (inp->sctp_ep.current_secret_number >=
+		    SCTP_HOW_MANY_SECRETS) {
+			inp->sctp_ep.current_secret_number = 0;
+		}
+		secret = (int)inp->sctp_ep.current_secret_number;
+		for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
+			inp->sctp_ep.secret_key[secret][i] =
+			    sctp_select_initial_TSN(&inp->sctp_ep);
+		}
+		sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
+		did_output = false;
+		break;
+	case SCTP_TIMER_TYPE_PATHMTURAISE:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timopathmtu);
+		sctp_pathmtu_timer(inp, stcb, net);
+		did_output = false;
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWNACK:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		if (sctp_shutdownack_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+		SCTP_STAT_INCR(sctps_timoshutdownack);
+		stcb->asoc.timoshutdownack++;
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, net);
+#endif
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_ACK_TMR, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_ASCONF:
+		KASSERT(inp != NULL && stcb != NULL && net != NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoasconf);
+		if (sctp_asconf_timer(inp, stcb, net)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_auditing(4, inp, stcb, net);
+#endif
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_ASCONF_TMR, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
+		KASSERT(inp != NULL && stcb != NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoshutdownguard);
+		op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+		                             "Shutdown guard timer expired");
+		sctp_abort_an_association(inp, stcb, op_err, true, SCTP_SO_NOT_LOCKED);
+		/* no need to unlock on tcb its gone */
+		goto out_decr;
+	case SCTP_TIMER_TYPE_AUTOCLOSE:
+		KASSERT(inp != NULL && stcb != NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoautoclose);
+		sctp_autoclose_timer(inp, stcb);
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_STRRESET:
+		KASSERT(inp != NULL && stcb != NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timostrmrst);
+		if (sctp_strreset_timer(inp, stcb)) {
+			/* no need to unlock on tcb its gone */
+			goto out_decr;
+		}
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_TMR, SCTP_SO_NOT_LOCKED);
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_INPKILL:
+		KASSERT(inp != NULL && stcb == NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoinpkill);
+		/*
+		 * special case, take away our increment since WE are the
+		 * killer
+		 */
+		sctp_timer_stop(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_3);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 1);
+#endif
+		SCTP_INP_DECR_REF(inp);
+		SCTP_INP_WUNLOCK(inp);
+		sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
+		                SCTP_CALLED_FROM_INPKILL_TIMER);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1);
+#endif
+		inp = NULL;
+		goto out_decr;
+	case SCTP_TIMER_TYPE_ASOCKILL:
+		KASSERT(inp != NULL && stcb != NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timoassockill);
+		/* Can we free it yet? */
+		sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_1);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		so = SCTP_INP_SO(inp);
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		SCTP_TCB_UNLOCK(stcb);
+		SCTP_SOCKET_LOCK(so, 1);
+		SCTP_TCB_LOCK(stcb);
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+#endif
+		(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+		                      SCTP_FROM_SCTPUTIL + SCTP_LOC_2);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		SCTP_SOCKET_UNLOCK(so, 1);
+#endif
+		/*
+		 * free asoc, always unlocks (or destroy's) so prevent
+		 * duplicate unlock or unlock of a free mtx :-0
+		 */
+		stcb = NULL;
+		goto out_decr;
+	case SCTP_TIMER_TYPE_ADDR_WQ:
+		KASSERT(inp == NULL && stcb == NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		sctp_handle_addr_wq();
+		did_output = true;
+		break;
+	case SCTP_TIMER_TYPE_PRIM_DELETED:
+		KASSERT(inp != NULL && stcb != NULL && net == NULL,
+		        ("timeout of type %d: inp = %p, stcb = %p, net = %p",
+		         type, inp, stcb, net));
+		SCTP_STAT_INCR(sctps_timodelprim);
+		sctp_delete_prim_timer(inp, stcb);
+		did_output = false;
+		break;
+	default:
+#ifdef INVARIANTS
+		panic("Unknown timer type %d", type);
+#else
+		goto out;
+#endif
+	}
+#ifdef SCTP_AUDITING_ENABLED
+	sctp_audit_log(0xF1, (uint8_t) type);
+	if (inp != NULL)
+		sctp_auditing(5, inp, stcb, net);
+#endif
+	if (did_output && (stcb != NULL)) {
+		/*
+		 * Now we need to clean up the control chunk chain if an
+		 * ECNE is on it. It must be marked as UNSENT again so next
+		 * call will continue to send it until such time that we get
+		 * a CWR, to remove it. It is, however, less likely that we
+		 * will find a ecn echo on the chain though.
+		 */
+		sctp_fix_ecn_echo(&stcb->asoc);
+	}
+out:
+	if (stcb != NULL) {
+		SCTP_TCB_UNLOCK(stcb);
+	} else if (inp != NULL) {
+		SCTP_INP_WUNLOCK(inp);
+	} else {
+		SCTP_WQ_ADDR_UNLOCK();
+	}
+
+out_decr:
+#if defined(__Userspace__)
+	if (upcall_socket != NULL) {
+		if ((upcall_socket->so_upcall != NULL) &&
+		    (upcall_socket->so_error != 0)) {
+			(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
+		}
+		ACCEPT_LOCK();
+		SOCK_LOCK(upcall_socket);
+		sorele(upcall_socket);
+	}
+#endif
+	/* These reference counts were incremented in sctp_timer_start(). */
+	if (inp != NULL) {
+		SCTP_INP_DECR_REF(inp);
+	}
+	if ((stcb != NULL) && !released_asoc_reference) {
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+	}
+	if (net != NULL) {
+		sctp_free_remote_addr(net);
+	}
+	SCTPDBG(SCTP_DEBUG_TIMER2, "Timer type %d handler finished.\n", type);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	CURVNET_RESTORE();
+	NET_EPOCH_EXIT(et);
+#endif
+}
+
+/*-
+ * The following table shows which parameters must be provided
+ * when calling sctp_timer_start(). For parameters not being
+ * provided, NULL must be used.
+ *
+ * |Name                         |inp |stcb|net |
+ * |-----------------------------|----|----|----|
+ * |SCTP_TIMER_TYPE_SEND         |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_INIT         |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_RECV         |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_SHUTDOWN     |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_HEARTBEAT    |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_COOKIE       |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_NEWCOOKIE    |Yes |No  |No  |
+ * |SCTP_TIMER_TYPE_PATHMTURAISE |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_SHUTDOWNACK  |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_ASCONF       |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_SHUTDOWNGUARD|Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_AUTOCLOSE    |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_STRRESET     |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_INPKILL      |Yes |No  |No  |
+ * |SCTP_TIMER_TYPE_ASOCKILL     |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_ADDR_WQ      |No  |No  |No  |
+ * |SCTP_TIMER_TYPE_PRIM_DELETED |Yes |Yes |No  |
+ *
+ */
+
+void
+sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+    struct sctp_nets *net)
+{
+	struct sctp_timer *tmr;
+	uint32_t to_ticks;
+	uint32_t rndval, jitter;
+
+	KASSERT(stcb == NULL || stcb->sctp_ep == inp,
+	        ("sctp_timer_start of type %d: inp = %p, stcb->sctp_ep %p",
+	         t_type, stcb, stcb->sctp_ep));
+	tmr = NULL;
+	if (stcb != NULL) {
+		SCTP_TCB_LOCK_ASSERT(stcb);
+	} else if (inp != NULL) {
+		SCTP_INP_WLOCK_ASSERT(inp);
+	} else {
+		SCTP_WQ_ADDR_LOCK_ASSERT();
+	}
+	if (stcb != NULL) {
+		/* Don't restart timer on association that's about to be killed. */
+		if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
+		    (t_type != SCTP_TIMER_TYPE_ASOCKILL)) {
+			SCTPDBG(SCTP_DEBUG_TIMER2,
+				"Timer type %d not started: inp=%p, stcb=%p, net=%p (stcb deleted).\n",
+				t_type, inp, stcb, net);
+			return;
+		}
+		/* Don't restart timer on net that's been removed. */
+		if (net != NULL && (net->dest_state & SCTP_ADDR_BEING_DELETED)) {
+			SCTPDBG(SCTP_DEBUG_TIMER2,
+				"Timer type %d not started: inp=%p, stcb=%p, net=%p (net deleted).\n",
+				t_type, inp, stcb, net);
+			return;
+		}
+	}
+	switch (t_type) {
+	case SCTP_TIMER_TYPE_SEND:
+		/* Here we use the RTO timer. */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_INIT:
+		/*
+		 * Here we use the INIT timer default usually about 1
+		 * second.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_RECV:
+		/*
+		 * Here we use the Delayed-Ack timer value from the inp,
+		 * usually about 200ms.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.dack_timer;
+		to_ticks = sctp_msecs_to_ticks(stcb->asoc.delayed_ack);
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWN:
+		/* Here we use the RTO of the destination. */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_HEARTBEAT:
+		/*
+		 * The net is used here so that we can add in the RTO. Even
+		 * though we use a different timer. We also add the HB timer
+		 * PLUS a random jitter.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		if ((net->dest_state & SCTP_ADDR_NOHB) &&
+		    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
+			SCTPDBG(SCTP_DEBUG_TIMER2,
+			        "Timer type %d not started: inp=%p, stcb=%p, net=%p.\n",
+			        t_type, inp, stcb, net);
+			return;
+		}
+		tmr = &net->hb_timer;
+		if (net->RTO == 0) {
+			to_ticks = stcb->asoc.initial_rto;
+		} else {
+			to_ticks = net->RTO;
+		}
+		rndval = sctp_select_initial_TSN(&inp->sctp_ep);
+		jitter = rndval % to_ticks;
+		if (to_ticks > 1) {
+			to_ticks >>= 1;
+		}
+		if (jitter < (UINT32_MAX - to_ticks)) {
+			to_ticks += jitter;
+		} else {
+			to_ticks = UINT32_MAX;
+		}
+		if (!((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
+		      (net->dest_state & SCTP_ADDR_REACHABLE)) &&
+		    ((net->dest_state & SCTP_ADDR_PF) == 0)) {
+			if (net->heart_beat_delay < (UINT32_MAX - to_ticks)) {
+				to_ticks += net->heart_beat_delay;
+			} else {
+				to_ticks = UINT32_MAX;
+			}
+		}
+		/*
+		 * Now we must convert the to_ticks that are now in
+		 * ms to ticks.
+		 */
+		to_ticks = sctp_msecs_to_ticks(to_ticks);
+		break;
+	case SCTP_TIMER_TYPE_COOKIE:
+		/*
+		 * Here we can use the RTO timer from the network since one
+		 * RTT was complete. If a retransmission happened then we will
+		 * be using the RTO initial value.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_NEWCOOKIE:
+		/*
+		 * Nothing needed but the endpoint here usually about 60
+		 * minutes.
+		 */
+		if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &inp->sctp_ep.signature_change;
+		to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_SIGNATURE];
+		break;
+	case SCTP_TIMER_TYPE_PATHMTURAISE:
+		/*
+		 * Here we use the value found in the EP for PMTUD, usually
+		 * about 10 minutes.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
+			SCTPDBG(SCTP_DEBUG_TIMER2,
+			        "Timer type %d not started: inp=%p, stcb=%p, net=%p.\n",
+			        t_type, inp, stcb, net);
+			return;
+		}
+		tmr = &net->pmtu_timer;
+		to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_PMTU];
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWNACK:
+		/* Here we use the RTO of the destination. */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_ASCONF:
+		/*
+		 * Here the timer comes from the stcb but its value is from
+		 * the net's RTO.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.asconf_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
+		/*
+		 * Here we use the endpoints shutdown guard timer usually
+		 * about 3 minutes.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.shut_guard_timer;
+		if (inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] == 0) {
+			if (stcb->asoc.maxrto < UINT32_MAX / 5) {
+				to_ticks = sctp_msecs_to_ticks(5 * stcb->asoc.maxrto);
+			} else {
+				to_ticks = sctp_msecs_to_ticks(UINT32_MAX);
+			}
+		} else {
+			to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
+		}
+		break;
+	case SCTP_TIMER_TYPE_AUTOCLOSE:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.autoclose_timer;
+		to_ticks = stcb->asoc.sctp_autoclose_ticks;
+		break;
+	case SCTP_TIMER_TYPE_STRRESET:
+		/*
+		 * Here the timer comes from the stcb but its value is from
+		 * the net's RTO.
+		 */
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.strreset_timer;
+		if (net->RTO == 0) {
+			to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		} else {
+			to_ticks = sctp_msecs_to_ticks(net->RTO);
+		}
+		break;
+	case SCTP_TIMER_TYPE_INPKILL:
+		/*
+		 * The inp is setup to die. We re-use the signature_change
+		 * timer since that has stopped and we are in the GONE
+		 * state.
+		 */
+		if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &inp->sctp_ep.signature_change;
+		to_ticks = sctp_msecs_to_ticks(SCTP_INP_KILL_TIMEOUT);
+		break;
+	case SCTP_TIMER_TYPE_ASOCKILL:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.strreset_timer;
+		to_ticks = sctp_msecs_to_ticks(SCTP_ASOC_KILL_TIMEOUT);
+		break;
+	case SCTP_TIMER_TYPE_ADDR_WQ:
+		if ((inp != NULL) || (stcb != NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		/* Only 1 tick away :-) */
+		tmr = &SCTP_BASE_INFO(addr_wq_timer);
+		to_ticks = SCTP_ADDRESS_TICK_DELAY;
+		break;
+	case SCTP_TIMER_TYPE_PRIM_DELETED:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_start of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.delete_prim_timer;
+		to_ticks = sctp_msecs_to_ticks(stcb->asoc.initial_rto);
+		break;
+	default:
+#ifdef INVARIANTS
+		panic("Unknown timer type %d", t_type);
+#else
+		return;
+#endif
+	}
+	KASSERT(tmr != NULL, ("tmr is NULL for timer type %d", t_type));
+	KASSERT(to_ticks > 0, ("to_ticks == 0 for timer type %d", t_type));
+	if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
+		/*
+		 * We do NOT allow you to have it already running. If it is,
+		 * we leave the current one up unchanged.
+		 */
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Timer type %d already running: inp=%p, stcb=%p, net=%p.\n",
+		         t_type, inp, stcb, net);
+		return;
+	}
+	/* At this point we can proceed. */
+	if (t_type == SCTP_TIMER_TYPE_SEND) {
+		stcb->asoc.num_send_timers_up++;
+	}
+	tmr->stopped_from = 0;
+	tmr->type = t_type;
+	tmr->ep = (void *)inp;
+	tmr->tcb = (void *)stcb;
+	if (t_type == SCTP_TIMER_TYPE_STRRESET) {
+		tmr->net = NULL;
+	} else {
+		tmr->net = (void *)net;
+	}
+	tmr->self = (void *)tmr;
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	tmr->vnet = (void *)curvnet;
+#endif
+	tmr->ticks = sctp_get_tick_count();
+	if (SCTP_OS_TIMER_START(&tmr->timer, to_ticks, sctp_timeout_handler, tmr) == 0) {
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Timer type %d started: ticks=%u, inp=%p, stcb=%p, net=%p.\n",
+		         t_type, to_ticks, inp, stcb, net);
+		/*
+		 * If this is a newly scheduled callout, as opposed to a
+		 * rescheduled one, increment relevant reference counts.
+		 */
+		if (tmr->ep != NULL) {
+			SCTP_INP_INCR_REF(inp);
+		}
+		if (tmr->tcb != NULL) {
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+		}
+		if (tmr->net != NULL) {
+			atomic_add_int(&net->ref_count, 1);
+		}
+	} else {
+		/*
+		 * This should not happen, since we checked for pending
+		 * above.
+		 */
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Timer type %d restarted: ticks=%u, inp=%p, stcb=%p, net=%p.\n",
+		         t_type, to_ticks, inp, stcb, net);
+	}
+	return;
+}
+
+/*-
+ * The following table shows which parameters must be provided
+ * when calling sctp_timer_stop(). For parameters not being
+ * provided, NULL must be used.
+ *
+ * |Name                         |inp |stcb|net |
+ * |-----------------------------|----|----|----|
+ * |SCTP_TIMER_TYPE_SEND         |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_INIT         |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_RECV         |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_SHUTDOWN     |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_HEARTBEAT    |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_COOKIE       |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_NEWCOOKIE    |Yes |No  |No  |
+ * |SCTP_TIMER_TYPE_PATHMTURAISE |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_SHUTDOWNACK  |Yes |Yes |Yes |
+ * |SCTP_TIMER_TYPE_ASCONF       |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_SHUTDOWNGUARD|Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_AUTOCLOSE    |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_STRRESET     |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_INPKILL      |Yes |No  |No  |
+ * |SCTP_TIMER_TYPE_ASOCKILL     |Yes |Yes |No  |
+ * |SCTP_TIMER_TYPE_ADDR_WQ      |No  |No  |No  |
+ * |SCTP_TIMER_TYPE_PRIM_DELETED |Yes |Yes |No  |
+ *
+ */
+
+void
+sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+    struct sctp_nets *net, uint32_t from)
+{
+	struct sctp_timer *tmr;
+
+	KASSERT(stcb == NULL || stcb->sctp_ep == inp,
+	        ("sctp_timer_stop of type %d: inp = %p, stcb->sctp_ep %p",
+	         t_type, stcb, stcb->sctp_ep));
+	if (stcb != NULL) {
+		SCTP_TCB_LOCK_ASSERT(stcb);
+	} else if (inp != NULL) {
+		SCTP_INP_WLOCK_ASSERT(inp);
+	} else {
+		SCTP_WQ_ADDR_LOCK_ASSERT();
+	}
+	tmr = NULL;
+	switch (t_type) {
+	case SCTP_TIMER_TYPE_SEND:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		break;
+	case SCTP_TIMER_TYPE_INIT:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		break;
+	case SCTP_TIMER_TYPE_RECV:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.dack_timer;
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWN:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		break;
+	case SCTP_TIMER_TYPE_HEARTBEAT:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->hb_timer;
+		break;
+	case SCTP_TIMER_TYPE_COOKIE:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		break;
+	case SCTP_TIMER_TYPE_NEWCOOKIE:
+		if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &inp->sctp_ep.signature_change;
+		break;
+	case SCTP_TIMER_TYPE_PATHMTURAISE:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->pmtu_timer;
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWNACK:
+		if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &net->rxt_timer;
+		break;
+	case SCTP_TIMER_TYPE_ASCONF:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.asconf_timer;
+		break;
+	case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.shut_guard_timer;
+		break;
+	case SCTP_TIMER_TYPE_AUTOCLOSE:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.autoclose_timer;
+		break;
+	case SCTP_TIMER_TYPE_STRRESET:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.strreset_timer;
+		break;
+	case SCTP_TIMER_TYPE_INPKILL:
+		/*
+		 * The inp is setup to die. We re-use the signature_change
+		 * timer since that has stopped and we are in the GONE
+		 * state.
+		 */
+		if ((inp == NULL) || (stcb != NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &inp->sctp_ep.signature_change;
+		break;
+	case SCTP_TIMER_TYPE_ASOCKILL:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.strreset_timer;
+		break;
+	case SCTP_TIMER_TYPE_ADDR_WQ:
+		if ((inp != NULL) || (stcb != NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &SCTP_BASE_INFO(addr_wq_timer);
+		break;
+	case SCTP_TIMER_TYPE_PRIM_DELETED:
+		if ((inp == NULL) || (stcb == NULL) || (net != NULL)) {
+#ifdef INVARIANTS
+			panic("sctp_timer_stop of type %d: inp = %p, stcb = %p, net = %p",
+			      t_type, inp, stcb, net);
+#else
+			return;
+#endif
+		}
+		tmr = &stcb->asoc.delete_prim_timer;
+		break;
+	default:
+#ifdef INVARIANTS
+		panic("Unknown timer type %d", t_type);
+#else
+		return;
+#endif
+	}
+	KASSERT(tmr != NULL, ("tmr is NULL for timer type %d", t_type));
+	if ((tmr->type != SCTP_TIMER_TYPE_NONE) &&
+	    (tmr->type != t_type)) {
+		/*
+		 * Ok we have a timer that is under joint use. Cookie timer
+		 * per chance with the SEND timer. We therefore are NOT
+		 * running the timer that the caller wants stopped.  So just
+		 * return.
+		 */
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Shared timer type %d not running: inp=%p, stcb=%p, net=%p.\n",
+		         t_type, inp, stcb, net);
+		return;
+	}
+	if ((t_type == SCTP_TIMER_TYPE_SEND) && (stcb != NULL)) {
+		stcb->asoc.num_send_timers_up--;
+		if (stcb->asoc.num_send_timers_up < 0) {
+			stcb->asoc.num_send_timers_up = 0;
+		}
+	}
+	tmr->self = NULL;
+	tmr->stopped_from = from;
+	if (SCTP_OS_TIMER_STOP(&tmr->timer) == 1) {
+		KASSERT(tmr->ep == inp,
+		        ("sctp_timer_stop of type %d: inp = %p, tmr->inp = %p",
+		         t_type, inp, tmr->ep));
+		KASSERT(tmr->tcb == stcb,
+		        ("sctp_timer_stop of type %d: stcb = %p, tmr->stcb = %p",
+		         t_type, stcb, tmr->tcb));
+		KASSERT(((t_type == SCTP_TIMER_TYPE_ASCONF) && (tmr->net != NULL)) ||
+		        ((t_type != SCTP_TIMER_TYPE_ASCONF) && (tmr->net == net)),
+		        ("sctp_timer_stop of type %d: net = %p, tmr->net = %p",
+		         t_type, net, tmr->net));
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Timer type %d stopped: inp=%p, stcb=%p, net=%p.\n",
+		        t_type, inp, stcb, net);
+		/*
+		 * If the timer was actually stopped, decrement reference counts
+		 * that were incremented in sctp_timer_start().
+		 */
+		if (tmr->ep != NULL) {
+			tmr->ep = NULL;
+			SCTP_INP_DECR_REF(inp);
+		}
+		if (tmr->tcb != NULL) {
+			tmr->tcb = NULL;
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+		}
+		if (tmr->net != NULL) {
+			struct sctp_nets *tmr_net;
+
+			/*
+			 * Can't use net, since it doesn't work for
+			 * SCTP_TIMER_TYPE_ASCONF.
+			 */
+			tmr_net = tmr->net;
+			tmr->net = NULL;
+			sctp_free_remote_addr(tmr_net);
+		}
+	} else {
+		SCTPDBG(SCTP_DEBUG_TIMER2,
+		        "Timer type %d not stopped: inp=%p, stcb=%p, net=%p.\n",
+		         t_type, inp, stcb, net);
+	}
+	return;
+}
+
+uint32_t
+sctp_calculate_len(struct mbuf *m)
+{
+	struct mbuf *at;
+	uint32_t tlen;
+
+	tlen = 0;
+	for (at = m; at != NULL; at = SCTP_BUF_NEXT(at)) {
+		tlen += SCTP_BUF_LEN(at);
+	}
+	return (tlen);
+}
+
+/*
+ * Given an association and starting time of the current RTT period, update
+ * RTO in number of msecs. net should point to the current network.
+ * Return 1, if an RTO update was performed, return 0 if no update was
+ * performed due to invalid starting point.
+ */
+
+int
+sctp_calculate_rto(struct sctp_tcb *stcb,
+		   struct sctp_association *asoc,
+		   struct sctp_nets *net,
+		   struct timeval *old,
+		   int rtt_from_sack)
+{
+	struct timeval now;
+	uint64_t rtt_us;	/* RTT in us */
+	int32_t rtt;		/* RTT in ms */
+	uint32_t new_rto;
+	int first_measure = 0;
+
+	/************************/
+	/* 1. calculate new RTT */
+	/************************/
+	/* get the current time */
+	if (stcb->asoc.use_precise_time) {
+		(void)SCTP_GETPTIME_TIMEVAL(&now);
+	} else {
+		(void)SCTP_GETTIME_TIMEVAL(&now);
+	}
+	if ((old->tv_sec > now.tv_sec) ||
+	    ((old->tv_sec == now.tv_sec) && (old->tv_usec > now.tv_usec))) {
+		/* The starting point is in the future. */
+		return (0);
+	}
+	timevalsub(&now, old);
+	rtt_us = (uint64_t)1000000 * (uint64_t)now.tv_sec + (uint64_t)now.tv_usec;
+	if (rtt_us > SCTP_RTO_UPPER_BOUND * 1000) {
+		/* The RTT is larger than a sane value. */
+		return (0);
+	}
+	/* store the current RTT in us */
+	net->rtt = rtt_us;
+	/* compute rtt in ms */
+	rtt = (int32_t)(net->rtt / 1000);
+	if ((asoc->cc_functions.sctp_rtt_calculated) && (rtt_from_sack == SCTP_RTT_FROM_DATA)) {
+		/* Tell the CC module that a new update has just occurred from a sack */
+		(*asoc->cc_functions.sctp_rtt_calculated)(stcb, net, &now);
+	}
+	/* Do we need to determine the lan? We do this only
+	 * on sacks i.e. RTT being determined from data not
+	 * non-data (HB/INIT->INITACK).
+	 */
+	if ((rtt_from_sack == SCTP_RTT_FROM_DATA) &&
+	    (net->lan_type == SCTP_LAN_UNKNOWN)) {
+		if (net->rtt > SCTP_LOCAL_LAN_RTT) {
+			net->lan_type = SCTP_LAN_INTERNET;
+		} else {
+			net->lan_type = SCTP_LAN_LOCAL;
+		}
+	}
+
+	/***************************/
+	/* 2. update RTTVAR & SRTT */
+	/***************************/
+	/*-
+	 * Compute the scaled average lastsa and the
+	 * scaled variance lastsv as described in van Jacobson
+	 * Paper "Congestion Avoidance and Control", Annex A.
+	 *
+	 * (net->lastsa >> SCTP_RTT_SHIFT) is the srtt
+	 * (net->lastsv >> SCTP_RTT_VAR_SHIFT) is the rttvar
+	 */
+	if (net->RTO_measured) {
+		rtt -= (net->lastsa >> SCTP_RTT_SHIFT);
+		net->lastsa += rtt;
+		if (rtt < 0) {
+			rtt = -rtt;
+		}
+		rtt -= (net->lastsv >> SCTP_RTT_VAR_SHIFT);
+		net->lastsv += rtt;
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
+			rto_logging(net, SCTP_LOG_RTTVAR);
+		}
+	} else {
+		/* First RTO measurement */
+		net->RTO_measured = 1;
+		first_measure = 1;
+		net->lastsa = rtt << SCTP_RTT_SHIFT;
+		net->lastsv = (rtt / 2) << SCTP_RTT_VAR_SHIFT;
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
+			rto_logging(net, SCTP_LOG_INITIAL_RTT);
+		}
+	}
+	if (net->lastsv == 0) {
+		net->lastsv = SCTP_CLOCK_GRANULARITY;
+	}
+	new_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
+	if ((new_rto > SCTP_SAT_NETWORK_MIN) &&
+	    (stcb->asoc.sat_network_lockout == 0)) {
+		stcb->asoc.sat_network = 1;
+	} else if ((!first_measure) && stcb->asoc.sat_network) {
+		stcb->asoc.sat_network = 0;
+		stcb->asoc.sat_network_lockout = 1;
+	}
+	/* bound it, per C6/C7 in Section 5.3.1 */
+	if (new_rto < stcb->asoc.minrto) {
+		new_rto = stcb->asoc.minrto;
+	}
+	if (new_rto > stcb->asoc.maxrto) {
+		new_rto = stcb->asoc.maxrto;
+	}
+	net->RTO = new_rto;
+	return (1);
+}
+
+/*
+ * return a pointer to a contiguous piece of data from the given mbuf chain
+ * starting at 'off' for 'len' bytes.  If the desired piece spans more than
+ * one mbuf, a copy is made at 'ptr'. caller must ensure that the buffer size
+ * is >= 'len' returns NULL if there there isn't 'len' bytes in the chain.
+ */
+caddr_t
+sctp_m_getptr(struct mbuf *m, int off, int len, uint8_t * in_ptr)
+{
+	uint32_t count;
+	uint8_t *ptr;
+
+	ptr = in_ptr;
+	if ((off < 0) || (len <= 0))
+		return (NULL);
+
+	/* find the desired start location */
+	while ((m != NULL) && (off > 0)) {
+		if (off < SCTP_BUF_LEN(m))
+			break;
+		off -= SCTP_BUF_LEN(m);
+		m = SCTP_BUF_NEXT(m);
+	}
+	if (m == NULL)
+		return (NULL);
+
+	/* is the current mbuf large enough (eg. contiguous)? */
+	if ((SCTP_BUF_LEN(m) - off) >= len) {
+		return (mtod(m, caddr_t) + off);
+	} else {
+		/* else, it spans more than one mbuf, so save a temp copy... */
+		while ((m != NULL) && (len > 0)) {
+			count = min(SCTP_BUF_LEN(m) - off, len);
+			memcpy(ptr, mtod(m, caddr_t) + off, count);
+			len -= count;
+			ptr += count;
+			off = 0;
+			m = SCTP_BUF_NEXT(m);
+		}
+		if ((m == NULL) && (len > 0))
+			return (NULL);
+		else
+			return ((caddr_t)in_ptr);
+	}
+}
+
+struct sctp_paramhdr *
+sctp_get_next_param(struct mbuf *m,
+    int offset,
+    struct sctp_paramhdr *pull,
+    int pull_limit)
+{
+	/* This just provides a typed signature to Peter's Pull routine */
+	return ((struct sctp_paramhdr *)sctp_m_getptr(m, offset, pull_limit,
+	    (uint8_t *) pull));
+}
+
+struct mbuf *
+sctp_add_pad_tombuf(struct mbuf *m, int padlen)
+{
+	struct mbuf *m_last;
+	caddr_t dp;
+
+	if (padlen > 3) {
+		return (NULL);
+	}
+	if (padlen <= M_TRAILINGSPACE(m)) {
+		/*
+		 * The easy way. We hope the majority of the time we hit
+		 * here :)
+		 */
+		m_last = m;
+	} else {
+		/* Hard way we must grow the mbuf chain */
+		m_last = sctp_get_mbuf_for_msg(padlen, 0, M_NOWAIT, 1, MT_DATA);
+		if (m_last == NULL) {
+			return (NULL);
+		}
+		SCTP_BUF_LEN(m_last) = 0;
+		SCTP_BUF_NEXT(m_last) = NULL;
+		SCTP_BUF_NEXT(m) = m_last;
+	}
+	dp = mtod(m_last, caddr_t) + SCTP_BUF_LEN(m_last);
+	SCTP_BUF_LEN(m_last) += padlen;
+	memset(dp, 0, padlen);
+	return (m_last);
+}
+
+struct mbuf *
+sctp_pad_lastmbuf(struct mbuf *m, int padval, struct mbuf *last_mbuf)
+{
+	/* find the last mbuf in chain and pad it */
+	struct mbuf *m_at;
+
+	if (last_mbuf != NULL) {
+		return (sctp_add_pad_tombuf(last_mbuf, padval));
+	} else {
+		for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+			if (SCTP_BUF_NEXT(m_at) == NULL) {
+				return (sctp_add_pad_tombuf(m_at, padval));
+			}
+		}
+	}
+	return (NULL);
+}
+
+static void
+sctp_notify_assoc_change(uint16_t state, struct sctp_tcb *stcb,
+                         uint16_t error, struct sctp_abort_chunk *abort,
+                         bool from_peer, bool timedout, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_assoc_change *sac;
+	struct sctp_queued_to_read *control;
+	struct sctp_inpcb *inp;
+	unsigned int notif_len;
+	unsigned int i;
+	uint16_t abort_len;
+#if defined(__APPLE__) && !defined(__Userspace__)
+	struct socket *so;
+#endif
+
+	KASSERT(abort == NULL || from_peer,
+	        ("sctp_notify_assoc_change: ABORT chunk provided for local termination"));
+	KASSERT(!from_peer || !timedout,
+	        ("sctp_notify_assoc_change: timeouts can only be local"));
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	inp = stcb->sctp_ep;
+	SCTP_INP_READ_LOCK_ASSERT(inp);
+
+	if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT)) {
+		notif_len = (unsigned int)sizeof(struct sctp_assoc_change);
+		if (abort != NULL) {
+			abort_len = ntohs(abort->ch.chunk_length);
+			/*
+			 * Only SCTP_CHUNK_BUFFER_SIZE are guaranteed to be
+			 * contiguous.
+			 */
+			if (abort_len > SCTP_CHUNK_BUFFER_SIZE) {
+				abort_len = SCTP_CHUNK_BUFFER_SIZE;
+			}
+		} else {
+			abort_len = 0;
+		}
+		if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
+			notif_len += SCTP_ASSOC_SUPPORTS_MAX;
+		} else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
+			notif_len += abort_len;
+		}
+		m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
+		if (m_notify == NULL) {
+			/* Retry with smaller value. */
+			notif_len = (unsigned int)sizeof(struct sctp_assoc_change);
+			m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
+			if (m_notify == NULL) {
+				goto set_error;
+			}
+		}
+		SCTP_BUF_NEXT(m_notify) = NULL;
+		sac = mtod(m_notify, struct sctp_assoc_change *);
+		memset(sac, 0, notif_len);
+		sac->sac_type = SCTP_ASSOC_CHANGE;
+		sac->sac_flags = 0;
+		sac->sac_length = sizeof(struct sctp_assoc_change);
+		sac->sac_state = state;
+		sac->sac_error = error;
+		if (state == SCTP_CANT_STR_ASSOC) {
+			sac->sac_outbound_streams = 0;
+			sac->sac_inbound_streams = 0;
+		} else {
+			sac->sac_outbound_streams = stcb->asoc.streamoutcnt;
+			sac->sac_inbound_streams = stcb->asoc.streamincnt;
+		}
+		sac->sac_assoc_id = sctp_get_associd(stcb);
+		if (notif_len > sizeof(struct sctp_assoc_change)) {
+			if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
+				i = 0;
+				if (stcb->asoc.prsctp_supported == 1) {
+					sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_PR;
+				}
+				if (stcb->asoc.auth_supported == 1) {
+					sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_AUTH;
+				}
+				if (stcb->asoc.asconf_supported == 1) {
+					sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_ASCONF;
+				}
+				if (stcb->asoc.idata_supported == 1) {
+					sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_INTERLEAVING;
+				}
+				sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_MULTIBUF;
+				if (stcb->asoc.reconfig_supported == 1) {
+					sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_RE_CONFIG;
+				}
+				sac->sac_length += i;
+			} else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
+				memcpy(sac->sac_info, abort, abort_len);
+				sac->sac_length += abort_len;
+			}
+		}
+		SCTP_BUF_LEN(m_notify) = sac->sac_length;
+		control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+		                                 0, 0, stcb->asoc.context, 0, 0, 0,
+		                                 m_notify);
+		if (control != NULL) {
+			control->length = SCTP_BUF_LEN(m_notify);
+			control->spec_flags = M_NOTIFICATION;
+			/* not that we need this */
+			control->tail_mbuf = m_notify;
+			sctp_add_to_readq(inp, stcb, control,
+			                  &stcb->sctp_socket->so_rcv, 1,
+			                  SCTP_READ_LOCK_HELD, so_locked);
+		} else {
+			sctp_m_freem(m_notify);
+		}
+	}
+	/*
+	 * For 1-to-1 style sockets, we send up and error when an ABORT
+	 * comes in.
+	 */
+set_error:
+	if (((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+	     (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
+	    ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
+		SOCK_LOCK(stcb->sctp_socket);
+		if (from_peer) {
+			if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNREFUSED);
+				stcb->sctp_socket->so_error = ECONNREFUSED;
+			} else {
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
+				stcb->sctp_socket->so_error = ECONNRESET;
+			}
+		} else {
+			if (timedout) {
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ETIMEDOUT);
+				stcb->sctp_socket->so_error = ETIMEDOUT;
+			} else {
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNABORTED);
+				stcb->sctp_socket->so_error = ECONNABORTED;
+			}
+		}
+		SOCK_UNLOCK(stcb->sctp_socket);
+	}
+	/* Wake ANY sleepers */
+#if defined(__APPLE__) && !defined(__Userspace__)
+	so = SCTP_INP_SO(inp);
+	if (!so_locked) {
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		SCTP_TCB_UNLOCK(stcb);
+		SCTP_SOCKET_LOCK(so, 1);
+		SCTP_TCB_LOCK(stcb);
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+		if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
+			SCTP_SOCKET_UNLOCK(so, 1);
+			return;
+		}
+	}
+#endif
+	if (((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+	     (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
+	    ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
+		socantrcvmore(stcb->sctp_socket);
+	}
+	sorwakeup(stcb->sctp_socket);
+	sowwakeup(stcb->sctp_socket);
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (!so_locked) {
+		SCTP_SOCKET_UNLOCK(so, 1);
+	}
+#endif
+}
+
+static void
+sctp_notify_peer_addr_change(struct sctp_tcb *stcb, uint32_t state,
+    struct sockaddr *sa, uint32_t error, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_paddr_change *spc;
+	struct sctp_queued_to_read *control;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		return;
+	SCTP_BUF_LEN(m_notify) = 0;
+	spc = mtod(m_notify, struct sctp_paddr_change *);
+	memset(spc, 0, sizeof(struct sctp_paddr_change));
+	spc->spc_type = SCTP_PEER_ADDR_CHANGE;
+	spc->spc_flags = 0;
+	spc->spc_length = sizeof(struct sctp_paddr_change);
+	switch (sa->sa_family) {
+#ifdef INET
+	case AF_INET:
+#ifdef INET6
+		if (sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) {
+			in6_sin_2_v4mapsin6((struct sockaddr_in *)sa,
+			                    (struct sockaddr_in6 *)&spc->spc_aaddr);
+		} else {
+			memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
+		}
+#else
+		memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
+#endif
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+	{
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+		struct sockaddr_in6 *sin6;
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+		memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in6));
+
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+		sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr;
+		if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
+			if (sin6->sin6_scope_id == 0) {
+				/* recover scope_id for user */
+#ifdef SCTP_KAME
+				(void)sa6_recoverscope(sin6);
+#else
+				(void)in6_recoverscope(sin6, &sin6->sin6_addr,
+				                       NULL);
+#endif
+			} else {
+				/* clear embedded scope_id for user */
+				in6_clearscope(&sin6->sin6_addr);
+			}
+		}
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+		break;
+	}
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+		memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_conn));
+		break;
+#endif
+	default:
+		/* TSNH */
+		break;
+	}
+	spc->spc_state = state;
+	spc->spc_error = error;
+	spc->spc_assoc_id = sctp_get_associd(stcb);
+
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_paddr_change);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_send_failed(struct sctp_tcb *stcb, uint8_t sent, uint32_t error,
+                        struct sctp_tmit_chunk *chk, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_send_failed *ssf;
+	struct sctp_send_failed_event *ssfe;
+	struct sctp_queued_to_read *control;
+	struct sctp_chunkhdr *chkhdr;
+	int notifhdr_len, chk_len, chkhdr_len, padding_len, payload_len;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
+	    sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
+		notifhdr_len = sizeof(struct sctp_send_failed_event);
+	} else {
+		notifhdr_len = sizeof(struct sctp_send_failed);
+	}
+	m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	SCTP_BUF_LEN(m_notify) = notifhdr_len;
+	if (stcb->asoc.idata_supported) {
+		chkhdr_len = sizeof(struct sctp_idata_chunk);
+	} else {
+		chkhdr_len = sizeof(struct sctp_data_chunk);
+	}
+	/* Use some defaults in case we can't access the chunk header */
+	if (chk->send_size >= chkhdr_len) {
+		payload_len = chk->send_size - chkhdr_len;
+	} else {
+		payload_len = 0;
+	}
+	padding_len = 0;
+	if (chk->data != NULL) {
+		chkhdr = mtod(chk->data, struct sctp_chunkhdr *);
+		if (chkhdr != NULL) {
+			chk_len = ntohs(chkhdr->chunk_length);
+			if ((chk_len >= chkhdr_len) &&
+			    (chk->send_size >= chk_len) &&
+			    (chk->send_size - chk_len < 4)) {
+				padding_len = chk->send_size - chk_len;
+				payload_len = chk->send_size - chkhdr_len - padding_len;
+			}
+		}
+	}
+	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
+		ssfe = mtod(m_notify, struct sctp_send_failed_event *);
+		memset(ssfe, 0, notifhdr_len);
+		ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
+		if (sent) {
+			ssfe->ssfe_flags = SCTP_DATA_SENT;
+		} else {
+			ssfe->ssfe_flags = SCTP_DATA_UNSENT;
+		}
+		ssfe->ssfe_length = (uint32_t)(notifhdr_len + payload_len);
+		ssfe->ssfe_error = error;
+		/* not exactly what the user sent in, but should be close :) */
+		ssfe->ssfe_info.snd_sid = chk->rec.data.sid;
+		ssfe->ssfe_info.snd_flags = chk->rec.data.rcv_flags;
+		ssfe->ssfe_info.snd_ppid = chk->rec.data.ppid;
+		ssfe->ssfe_info.snd_context = chk->rec.data.context;
+		ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
+		ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
+	} else {
+		ssf = mtod(m_notify, struct sctp_send_failed *);
+		memset(ssf, 0, notifhdr_len);
+		ssf->ssf_type = SCTP_SEND_FAILED;
+		if (sent) {
+			ssf->ssf_flags = SCTP_DATA_SENT;
+		} else {
+			ssf->ssf_flags = SCTP_DATA_UNSENT;
+		}
+		ssf->ssf_length = (uint32_t)(notifhdr_len + payload_len);
+		ssf->ssf_error = error;
+		/* not exactly what the user sent in, but should be close :) */
+		ssf->ssf_info.sinfo_stream = chk->rec.data.sid;
+		ssf->ssf_info.sinfo_ssn = (uint16_t)chk->rec.data.mid;
+		ssf->ssf_info.sinfo_flags = chk->rec.data.rcv_flags;
+		ssf->ssf_info.sinfo_ppid = chk->rec.data.ppid;
+		ssf->ssf_info.sinfo_context = chk->rec.data.context;
+		ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
+		ssf->ssf_assoc_id = sctp_get_associd(stcb);
+	}
+	if (chk->data != NULL) {
+		/* Trim off the sctp chunk header (it should be there) */
+		if (chk->send_size == chkhdr_len + payload_len + padding_len) {
+			m_adj(chk->data, chkhdr_len);
+			m_adj(chk->data, -padding_len);
+			sctp_mbuf_crush(chk->data);
+			chk->send_size -= (chkhdr_len + padding_len);
+		}
+	}
+	SCTP_BUF_NEXT(m_notify) = chk->data;
+	/* Steal off the mbuf */
+	chk->data = NULL;
+	/*
+	 * For this case, we check the actual socket buffer, since the assoc
+	 * is going away we don't want to overfill the socket buffer for a
+	 * non-reader
+	 */
+	if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
+		sctp_m_freem(m_notify);
+		return;
+	}
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error,
+                         struct sctp_stream_queue_pending *sp, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_send_failed *ssf;
+	struct sctp_send_failed_event *ssfe;
+	struct sctp_queued_to_read *control;
+	int notifhdr_len;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
+	    sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
+		notifhdr_len = sizeof(struct sctp_send_failed_event);
+	} else {
+		notifhdr_len = sizeof(struct sctp_send_failed);
+	}
+	m_notify = sctp_get_mbuf_for_msg(notifhdr_len, 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL) {
+		/* no space left */
+		return;
+	}
+	SCTP_BUF_LEN(m_notify) = notifhdr_len;
+	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
+		ssfe = mtod(m_notify, struct sctp_send_failed_event *);
+		memset(ssfe, 0, notifhdr_len);
+		ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
+		ssfe->ssfe_flags = SCTP_DATA_UNSENT;
+		ssfe->ssfe_length = (uint32_t)(notifhdr_len + sp->length);
+		ssfe->ssfe_error = error;
+		/* not exactly what the user sent in, but should be close :) */
+		ssfe->ssfe_info.snd_sid = sp->sid;
+		if (sp->some_taken) {
+			ssfe->ssfe_info.snd_flags = SCTP_DATA_LAST_FRAG;
+		} else {
+			ssfe->ssfe_info.snd_flags = SCTP_DATA_NOT_FRAG;
+		}
+		ssfe->ssfe_info.snd_ppid = sp->ppid;
+		ssfe->ssfe_info.snd_context = sp->context;
+		ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
+		ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
+	} else {
+		ssf = mtod(m_notify, struct sctp_send_failed *);
+		memset(ssf, 0, notifhdr_len);
+		ssf->ssf_type = SCTP_SEND_FAILED;
+		ssf->ssf_flags = SCTP_DATA_UNSENT;
+		ssf->ssf_length = (uint32_t)(notifhdr_len + sp->length);
+		ssf->ssf_error = error;
+		/* not exactly what the user sent in, but should be close :) */
+		ssf->ssf_info.sinfo_stream = sp->sid;
+		ssf->ssf_info.sinfo_ssn = 0;
+		if (sp->some_taken) {
+			ssf->ssf_info.sinfo_flags = SCTP_DATA_LAST_FRAG;
+		} else {
+			ssf->ssf_info.sinfo_flags = SCTP_DATA_NOT_FRAG;
+		}
+		ssf->ssf_info.sinfo_ppid = sp->ppid;
+		ssf->ssf_info.sinfo_context = sp->context;
+		ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
+		ssf->ssf_assoc_id = sctp_get_associd(stcb);
+	}
+	SCTP_BUF_NEXT(m_notify) = sp->data;
+
+	/* Steal off the mbuf */
+	sp->data = NULL;
+	/*
+	 * For this case, we check the actual socket buffer, since the assoc
+	 * is going away we don't want to overfill the socket buffer for a
+	 * non-reader
+	 */
+	if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
+		sctp_m_freem(m_notify);
+		return;
+	}
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_adaptation_layer(struct sctp_tcb *stcb, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_adaptation_event *sai;
+	struct sctp_queued_to_read *control;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	SCTP_BUF_LEN(m_notify) = 0;
+	sai = mtod(m_notify, struct sctp_adaptation_event *);
+	memset(sai, 0, sizeof(struct sctp_adaptation_event));
+	sai->sai_type = SCTP_ADAPTATION_INDICATION;
+	sai->sai_flags = 0;
+	sai->sai_length = sizeof(struct sctp_adaptation_event);
+	sai->sai_adaptation_ind = stcb->asoc.peers_adaptation;
+	sai->sai_assoc_id = sctp_get_associd(stcb);
+
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_adaptation_event);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb, uint32_t error,
+                                        struct sctp_queued_to_read *aborted_control,
+                                        int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_pdapi_event *pdapi;
+	struct sctp_queued_to_read *control;
+	struct sockbuf *sb;
+
+	KASSERT(aborted_control != NULL, ("aborted_control is NULL"));
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_PDAPIEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_pdapi_event), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	SCTP_BUF_LEN(m_notify) = 0;
+	pdapi = mtod(m_notify, struct sctp_pdapi_event *);
+	memset(pdapi, 0, sizeof(struct sctp_pdapi_event));
+	pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT;
+	pdapi->pdapi_flags = 0;
+	pdapi->pdapi_length = sizeof(struct sctp_pdapi_event);
+	pdapi->pdapi_indication = error;
+	pdapi->pdapi_stream = aborted_control->sinfo_stream;
+	pdapi->pdapi_seq = (uint16_t)aborted_control->mid;
+	pdapi->pdapi_assoc_id = sctp_get_associd(stcb);
+
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_pdapi_event);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sb = &stcb->sctp_socket->so_rcv;
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+		sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m_notify));
+	}
+	sctp_sballoc(stcb, sb, m_notify);
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+		sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
+	}
+	control->end_added = 1;
+	TAILQ_INSERT_AFTER(&stcb->sctp_ep->read_queue, aborted_control, control, next);
+	if (stcb->sctp_ep && stcb->sctp_socket) {
+		/* This should always be the case */
+#if defined(__APPLE__) && !defined(__Userspace__)
+		struct socket *so;
+
+		so = SCTP_INP_SO(stcb->sctp_ep);
+		if (!so_locked) {
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+			SCTP_TCB_UNLOCK(stcb);
+			SCTP_SOCKET_LOCK(so, 1);
+			SCTP_TCB_LOCK(stcb);
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+			if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
+				SCTP_SOCKET_UNLOCK(so, 1);
+				return;
+			}
+		}
+#endif
+		sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		if (!so_locked) {
+			SCTP_SOCKET_UNLOCK(so, 1);
+		}
+#endif
+	}
+}
+
+static void
+sctp_notify_shutdown_event(struct sctp_tcb *stcb, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_shutdown_event *sse;
+	struct sctp_queued_to_read *control;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	/*
+	 * For TCP model AND UDP connected sockets we will send an error up
+	 * when an SHUTDOWN completes
+	 */
+	if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+	    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
+		/* mark socket closed for read/write and wakeup! */
+#if defined(__APPLE__) && !defined(__Userspace__)
+		struct socket *so;
+
+		so = SCTP_INP_SO(stcb->sctp_ep);
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		SCTP_TCB_UNLOCK(stcb);
+		SCTP_SOCKET_LOCK(so, 1);
+		SCTP_TCB_LOCK(stcb);
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+		if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
+			SCTP_SOCKET_UNLOCK(so, 1);
+			return;
+		}
+#endif
+		socantsendmore(stcb->sctp_socket);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		SCTP_SOCKET_UNLOCK(so, 1);
+#endif
+	}
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_event), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	sse = mtod(m_notify, struct sctp_shutdown_event *);
+	memset(sse, 0, sizeof(struct sctp_shutdown_event));
+	sse->sse_type = SCTP_SHUTDOWN_EVENT;
+	sse->sse_flags = 0;
+	sse->sse_length = sizeof(struct sctp_shutdown_event);
+	sse->sse_assoc_id = sctp_get_associd(stcb);
+
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_shutdown_event);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_sender_dry_event(struct sctp_tcb *stcb, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_sender_dry_event *event;
+	struct sctp_queued_to_read *control;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DRYEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_sender_dry_event), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL) {
+		/* no space left */
+		return;
+	}
+	SCTP_BUF_LEN(m_notify) = 0;
+	event = mtod(m_notify, struct sctp_sender_dry_event *);
+	memset(event, 0, sizeof(struct sctp_sender_dry_event));
+	event->sender_dry_type = SCTP_SENDER_DRY_EVENT;
+	event->sender_dry_flags = 0;
+	event->sender_dry_length = sizeof(struct sctp_sender_dry_event);
+	event->sender_dry_assoc_id = sctp_get_associd(stcb);
+
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_sender_dry_event);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_stream_reset_add(struct sctp_tcb *stcb, int flag, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_queued_to_read *control;
+	struct sctp_stream_change_event *stradd;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_CHANGEEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	if ((stcb->asoc.peer_req_out) && flag) {
+		/* Peer made the request, don't tell the local user */
+		stcb->asoc.peer_req_out = 0;
+		return;
+	}
+	stcb->asoc.peer_req_out = 0;
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_stream_change_event), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	SCTP_BUF_LEN(m_notify) = 0;
+	stradd = mtod(m_notify, struct sctp_stream_change_event *);
+	memset(stradd, 0, sizeof(struct sctp_stream_change_event));
+	stradd->strchange_type = SCTP_STREAM_CHANGE_EVENT;
+	stradd->strchange_flags = flag;
+	stradd->strchange_length = sizeof(struct sctp_stream_change_event);
+	stradd->strchange_assoc_id = sctp_get_associd(stcb);
+	stradd->strchange_instrms = stcb->asoc.streamincnt;
+	stradd->strchange_outstrms = stcb->asoc.streamoutcnt;
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_stream_change_event);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+	if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
+		/* no space */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, int flag, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_queued_to_read *control;
+	struct sctp_assoc_reset_event *strasoc;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ASSOC_RESETEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_assoc_reset_event), 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	SCTP_BUF_LEN(m_notify) = 0;
+	strasoc = mtod(m_notify, struct sctp_assoc_reset_event  *);
+	memset(strasoc, 0, sizeof(struct sctp_assoc_reset_event));
+	strasoc->assocreset_type = SCTP_ASSOC_RESET_EVENT;
+	strasoc->assocreset_flags = flag;
+	strasoc->assocreset_length = sizeof(struct sctp_assoc_reset_event);
+	strasoc->assocreset_assoc_id= sctp_get_associd(stcb);
+	strasoc->assocreset_local_tsn = stcb->asoc.sending_seq;
+	strasoc->assocreset_remote_tsn = stcb->asoc.mapping_array_base_tsn + 1;
+	SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_assoc_reset_event);
+	SCTP_BUF_NEXT(m_notify) = NULL;
+	if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
+		/* no space */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_stream_reset(struct sctp_tcb *stcb,
+                         int number_entries, uint16_t *list, int flag, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_queued_to_read *control;
+	struct sctp_stream_reset_event *strreset;
+	int len;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT)) {
+		/* event not enabled */
+		return;
+	}
+
+	m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL)
+		/* no space left */
+		return;
+	SCTP_BUF_LEN(m_notify) = 0;
+	len = sizeof(struct sctp_stream_reset_event) + (number_entries * sizeof(uint16_t));
+	if (len > M_TRAILINGSPACE(m_notify)) {
+		/* never enough room */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	strreset = mtod(m_notify, struct sctp_stream_reset_event *);
+	memset(strreset, 0, len);
+	strreset->strreset_type = SCTP_STREAM_RESET_EVENT;
+	strreset->strreset_flags = flag;
+	strreset->strreset_length = len;
+	strreset->strreset_assoc_id = sctp_get_associd(stcb);
+	if (number_entries) {
+		int i;
+
+		for (i = 0; i < number_entries; i++) {
+			strreset->strreset_stream_list[i] = ntohs(list[i]);
+		}
+	}
+	SCTP_BUF_LEN(m_notify) = len;
+	SCTP_BUF_NEXT(m_notify) = NULL;
+	if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
+		/* no space */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	/* append to socket */
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control == NULL) {
+		/* no memory */
+		sctp_m_freem(m_notify);
+		return;
+	}
+	control->length = SCTP_BUF_LEN(m_notify);
+	control->spec_flags = M_NOTIFICATION;
+	/* not that we need this */
+	control->tail_mbuf = m_notify;
+	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+	                  &stcb->sctp_socket->so_rcv, 1,
+	                  SCTP_READ_LOCK_HELD, so_locked);
+}
+
+static void
+sctp_notify_remote_error(struct sctp_tcb *stcb, uint16_t error,
+                         struct sctp_error_chunk *chunk, int so_locked)
+{
+	struct mbuf *m_notify;
+	struct sctp_remote_error *sre;
+	struct sctp_queued_to_read *control;
+	unsigned int notif_len;
+	uint16_t chunk_len;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_INP_READ_LOCK_ASSERT(stcb->sctp_ep);
+
+	if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPEERERR)) {
+		return;
+	}
+
+	if (chunk != NULL) {
+		chunk_len = ntohs(chunk->ch.chunk_length);
+		/*
+		 * Only SCTP_CHUNK_BUFFER_SIZE are guaranteed to be
+		 * contiguous.
+		 */
+		if (chunk_len > SCTP_CHUNK_BUFFER_SIZE) {
+			chunk_len = SCTP_CHUNK_BUFFER_SIZE;
+		}
+	} else {
+		chunk_len = 0;
+	}
+	notif_len = (unsigned int)(sizeof(struct sctp_remote_error) + chunk_len);
+	m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
+	if (m_notify == NULL) {
+		/* Retry with smaller value. */
+		notif_len = (unsigned int)sizeof(struct sctp_remote_error);
+		m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_NOWAIT, 1, MT_DATA);
+		if (m_notify == NULL) {
+			return;
+		}
+	}
+	SCTP_BUF_NEXT(m_notify) = NULL;
+	sre = mtod(m_notify, struct sctp_remote_error *);
+	memset(sre, 0, notif_len);
+	sre->sre_type = SCTP_REMOTE_ERROR;
+	sre->sre_flags = 0;
+	sre->sre_length = sizeof(struct sctp_remote_error);
+	sre->sre_error = error;
+	sre->sre_assoc_id = sctp_get_associd(stcb);
+	if (notif_len > sizeof(struct sctp_remote_error)) {
+		memcpy(sre->sre_data, chunk, chunk_len);
+		sre->sre_length += chunk_len;
+	}
+	SCTP_BUF_LEN(m_notify) = sre->sre_length;
+	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
+	                                 0, 0, stcb->asoc.context, 0, 0, 0,
+	                                 m_notify);
+	if (control != NULL) {
+		control->length = SCTP_BUF_LEN(m_notify);
+		control->spec_flags = M_NOTIFICATION;
+		/* not that we need this */
+		control->tail_mbuf = m_notify;
+		sctp_add_to_readq(stcb->sctp_ep, stcb, control,
+		                  &stcb->sctp_socket->so_rcv, 1,
+		                  SCTP_READ_LOCK_HELD, so_locked);
+	} else {
+		sctp_m_freem(m_notify);
+	}
+}
+
+void
+sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb,
+                uint32_t error, void *data, int so_locked)
+{
+	struct sctp_inpcb *inp;
+	struct sctp_nets *net;
+
+	KASSERT(stcb != NULL, ("stcb == NULL"));
+	SCTP_TCB_LOCK_ASSERT(stcb);
+
+	inp = stcb->sctp_ep;
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
+		return;
+	}
+	if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
+	    (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
+		if ((notification == SCTP_NOTIFY_INTERFACE_DOWN) ||
+		    (notification == SCTP_NOTIFY_INTERFACE_UP) ||
+		    (notification == SCTP_NOTIFY_INTERFACE_CONFIRMED)) {
+			/* Don't report these in front states */
+			return;
+		}
+	}
+	if (notification != SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION) {
+		SCTP_INP_READ_LOCK(inp);
+	}
+	SCTP_INP_READ_LOCK_ASSERT(inp);
+
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
+	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ)) {
+		SCTP_INP_READ_UNLOCK(inp);
+		return;
+	}
+
+	switch (notification) {
+	case SCTP_NOTIFY_ASSOC_UP:
+		if (stcb->asoc.assoc_up_sent == 0) {
+			sctp_notify_assoc_change(SCTP_COMM_UP, stcb, error, NULL, false, false, so_locked);
+			stcb->asoc.assoc_up_sent = 1;
+		}
+		if (stcb->asoc.adaptation_needed && (stcb->asoc.adaptation_sent == 0)) {
+			sctp_notify_adaptation_layer(stcb, so_locked);
+		}
+		if (stcb->asoc.auth_supported == 0) {
+			sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, 0, so_locked);
+		}
+		break;
+	case SCTP_NOTIFY_ASSOC_DOWN:
+		sctp_notify_assoc_change(SCTP_SHUTDOWN_COMP, stcb, error, NULL, false, false, so_locked);
+#if defined(__Userspace__)
+		if (inp->recv_callback) {
+			if (stcb->sctp_socket) {
+				union sctp_sockstore addr;
+				struct sctp_rcvinfo rcv;
+
+				memset(&addr, 0, sizeof(union sctp_sockstore));
+				memset(&rcv, 0, sizeof(struct sctp_rcvinfo));
+				atomic_add_int(&stcb->asoc.refcnt, 1);
+				SCTP_TCB_UNLOCK(stcb);
+				inp->recv_callback(stcb->sctp_socket, addr, NULL, 0, rcv, 0, inp->ulp_info);
+				SCTP_TCB_LOCK(stcb);
+				atomic_subtract_int(&stcb->asoc.refcnt, 1);
+			}
+		}
+#endif
+		break;
+	case SCTP_NOTIFY_INTERFACE_DOWN:
+		net = (struct sctp_nets *)data;
+		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_UNREACHABLE,
+		                             &net->ro._l_addr.sa, error, so_locked);
+		break;
+	case SCTP_NOTIFY_INTERFACE_UP:
+		net = (struct sctp_nets *)data;
+		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_AVAILABLE,
+		                             &net->ro._l_addr.sa, error, so_locked);
+		break;
+	case SCTP_NOTIFY_INTERFACE_CONFIRMED:
+		net = (struct sctp_nets *)data;
+		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_CONFIRMED,
+		                             &net->ro._l_addr.sa, error, so_locked);
+		break;
+	case SCTP_NOTIFY_SPECIAL_SP_FAIL:
+		sctp_notify_send_failed2(stcb, error,
+		                         (struct sctp_stream_queue_pending *)data, so_locked);
+		break;
+	case SCTP_NOTIFY_SENT_DG_FAIL:
+		sctp_notify_send_failed(stcb, 1, error,
+		    (struct sctp_tmit_chunk *)data, so_locked);
+		break;
+	case SCTP_NOTIFY_UNSENT_DG_FAIL:
+		sctp_notify_send_failed(stcb, 0, error,
+		                        (struct sctp_tmit_chunk *)data, so_locked);
+		break;
+	case SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION:
+		sctp_notify_partial_delivery_indication(stcb, error,
+		                                        (struct sctp_queued_to_read *)data,
+		                                        so_locked);
+		break;
+	case SCTP_NOTIFY_ASSOC_LOC_ABORTED:
+		if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
+		    (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
+			sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, false, false, so_locked);
+		} else {
+			sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, false, false, so_locked);
+		}
+		break;
+	case SCTP_NOTIFY_ASSOC_REM_ABORTED:
+		if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
+		    (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
+			sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, true, false, so_locked);
+		} else {
+			sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, true, false, so_locked);
+		}
+		break;
+	case SCTP_NOTIFY_ASSOC_TIMEDOUT:
+		if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
+		    (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
+			sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, false, true, so_locked);
+		} else {
+			sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, false, true, so_locked);
+		}
+		break;
+	case SCTP_NOTIFY_ASSOC_RESTART:
+		sctp_notify_assoc_change(SCTP_RESTART, stcb, error, NULL, false, false, so_locked);
+		if (stcb->asoc.auth_supported == 0) {
+			sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, 0, so_locked);
+		}
+		break;
+	case SCTP_NOTIFY_STR_RESET_SEND:
+		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_OUTGOING_SSN, so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_RECV:
+		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_INCOMING, so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_FAILED_OUT:
+		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
+		                         (SCTP_STREAM_RESET_OUTGOING_SSN|SCTP_STREAM_RESET_FAILED), so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_DENIED_OUT:
+		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
+		                         (SCTP_STREAM_RESET_OUTGOING_SSN|SCTP_STREAM_RESET_DENIED), so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_FAILED_IN:
+		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
+		                         (SCTP_STREAM_RESET_INCOMING|SCTP_STREAM_RESET_FAILED), so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_DENIED_IN:
+		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
+		                         (SCTP_STREAM_RESET_INCOMING|SCTP_STREAM_RESET_DENIED), so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_ADD:
+		sctp_notify_stream_reset_add(stcb, error, so_locked);
+		break;
+	case SCTP_NOTIFY_STR_RESET_TSN:
+		sctp_notify_stream_reset_tsn(stcb, error, so_locked);
+		break;
+	case SCTP_NOTIFY_ASCONF_ADD_IP:
+		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_ADDED, data,
+		                             error, so_locked);
+		break;
+	case SCTP_NOTIFY_ASCONF_DELETE_IP:
+		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_REMOVED, data,
+		                             error, so_locked);
+		break;
+	case SCTP_NOTIFY_ASCONF_SET_PRIMARY:
+		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_MADE_PRIM, data,
+		                             error, so_locked);
+		break;
+	case SCTP_NOTIFY_PEER_SHUTDOWN:
+		sctp_notify_shutdown_event(stcb, so_locked);
+		break;
+	case SCTP_NOTIFY_AUTH_NEW_KEY:
+		sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY,
+		                           *(uint16_t *)data, so_locked);
+		break;
+	case SCTP_NOTIFY_AUTH_FREE_KEY:
+		sctp_notify_authentication(stcb, SCTP_AUTH_FREE_KEY,
+		                           *(uint16_t *)data, so_locked);
+		break;
+	case SCTP_NOTIFY_NO_PEER_AUTH:
+		sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH,
+		                           0, so_locked);
+		break;
+	case SCTP_NOTIFY_SENDER_DRY:
+		sctp_notify_sender_dry_event(stcb, so_locked);
+		break;
+	case SCTP_NOTIFY_REMOTE_ERROR:
+		sctp_notify_remote_error(stcb, error, data, so_locked);
+		break;
+	default:
+		SCTPDBG(SCTP_DEBUG_UTIL1, "%s: unknown notification %xh (%u)\n",
+		        __func__, notification, notification);
+		break;
+	}
+	if (notification != SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION) {
+		SCTP_INP_READ_UNLOCK(inp);
+	}
+}
+
+void
+sctp_report_all_outbound(struct sctp_tcb *stcb, uint16_t error, int so_locked)
+{
+	struct sctp_association *asoc;
+	struct sctp_stream_out *outs;
+	struct sctp_tmit_chunk *chk, *nchk;
+	struct sctp_stream_queue_pending *sp, *nsp;
+	int i;
+
+	if (stcb == NULL) {
+		return;
+	}
+	asoc = &stcb->asoc;
+	if (asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+		/* already being freed */
+		return;
+	}
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	}
+#endif
+	if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+	    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
+	    (asoc->state & SCTP_STATE_CLOSED_SOCKET)) {
+		return;
+	}
+	/* now through all the gunk freeing chunks */
+	/* sent queue SHOULD be empty */
+	TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
+		TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
+		asoc->sent_queue_cnt--;
+		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--;
+#ifdef INVARIANTS
+			} else {
+				panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
+#endif
+			}
+		}
+		if (chk->data != NULL) {
+			sctp_free_bufspace(stcb, asoc, chk, 1);
+			sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
+			                error, chk, so_locked);
+			if (chk->data) {
+				sctp_m_freem(chk->data);
+				chk->data = NULL;
+			}
+		}
+		sctp_free_a_chunk(stcb, chk, so_locked);
+		/*sa_ignore FREED_MEMORY*/
+	}
+	/* pending send queue SHOULD be empty */
+	TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
+		TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
+		asoc->send_queue_cnt--;
+		if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
+			asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
+#ifdef INVARIANTS
+		} else {
+			panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
+#endif
+		}
+		if (chk->data != NULL) {
+			sctp_free_bufspace(stcb, asoc, chk, 1);
+			sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
+			                error, chk, so_locked);
+			if (chk->data) {
+				sctp_m_freem(chk->data);
+				chk->data = NULL;
+			}
+		}
+		sctp_free_a_chunk(stcb, chk, so_locked);
+		/*sa_ignore FREED_MEMORY*/
+	}
+	for (i = 0; i < asoc->streamoutcnt; i++) {
+		/* For each stream */
+		outs = &asoc->strmout[i];
+		/* clean up any sends there */
+		TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
+			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
+			TAILQ_REMOVE(&outs->outqueue, sp, next);
+			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
+			sctp_free_spbufspace(stcb, asoc, sp);
+			if (sp->data) {
+				sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
+						error, (void *)sp, so_locked);
+				if (sp->data) {
+					sctp_m_freem(sp->data);
+					sp->data = NULL;
+					sp->tail_mbuf = NULL;
+					sp->length = 0;
+				}
+			}
+			if (sp->net) {
+				sctp_free_remote_addr(sp->net);
+				sp->net = NULL;
+			}
+			/* Free the chunk */
+			sctp_free_a_strmoq(stcb, sp, so_locked);
+			/*sa_ignore FREED_MEMORY*/
+		}
+	}
+}
+
+void
+sctp_abort_notification(struct sctp_tcb *stcb, bool from_peer, bool timeout,
+                        uint16_t error, struct sctp_abort_chunk *abort,
+                        int so_locked)
+{
+	if (stcb == NULL) {
+		return;
+	}
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	}
+#endif
+	SCTP_TCB_LOCK_ASSERT(stcb);
+
+	if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
+	    ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
+	     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
+		sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_WAS_ABORTED);
+	}
+	if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+	    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
+	    (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
+		return;
+	}
+	SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
+	/* Tell them we lost the asoc */
+	sctp_report_all_outbound(stcb, error, so_locked);
+	if (from_peer) {
+		sctp_ulp_notify(SCTP_NOTIFY_ASSOC_REM_ABORTED, stcb, error, abort, so_locked);
+	} else {
+		if (timeout) {
+			sctp_ulp_notify(SCTP_NOTIFY_ASSOC_TIMEDOUT, stcb, error, abort, so_locked);
+		} else {
+			sctp_ulp_notify(SCTP_NOTIFY_ASSOC_LOC_ABORTED, stcb, error, abort, so_locked);
+		}
+	}
+}
+
+void
+sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+                       struct mbuf *m, int iphlen,
+                       struct sockaddr *src, struct sockaddr *dst,
+                       struct sctphdr *sh, struct mbuf *op_err,
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+                       uint8_t mflowtype, uint32_t mflowid,
+#endif
+                       uint32_t vrf_id, uint16_t port)
+{
+#if defined(__APPLE__) && !defined(__Userspace__)
+	struct socket *so;
+#endif
+	struct sctp_gen_error_cause* cause;
+	uint32_t vtag;
+	uint16_t cause_code;
+
+	if (stcb != NULL) {
+		vtag = stcb->asoc.peer_vtag;
+		vrf_id = stcb->asoc.vrf_id;
+		if (op_err != NULL) {
+			/* Read the cause code from the error cause. */
+			cause = mtod(op_err, struct sctp_gen_error_cause *);
+			cause_code = ntohs(cause->code);
+		} else {
+			cause_code = 0;
+		}
+	} else {
+		vtag = 0;
+	}
+	sctp_send_abort(m, iphlen, src, dst, sh, vtag, op_err,
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	                mflowtype, mflowid, inp->fibnum,
+#endif
+	                vrf_id, port);
+	if (stcb != NULL) {
+		/* We have a TCB to abort, send notification too */
+		sctp_abort_notification(stcb, false, false, cause_code, NULL, SCTP_SO_NOT_LOCKED);
+		/* Ok, now lets free it */
+#if defined(__APPLE__) && !defined(__Userspace__)
+		so = SCTP_INP_SO(inp);
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		SCTP_TCB_UNLOCK(stcb);
+		SCTP_SOCKET_LOCK(so, 1);
+		SCTP_TCB_LOCK(stcb);
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+#endif
+		SCTP_STAT_INCR_COUNTER32(sctps_aborted);
+		if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
+		    (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
+			SCTP_STAT_DECR_GAUGE32(sctps_currestab);
+		}
+		(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+		                      SCTP_FROM_SCTPUTIL + SCTP_LOC_4);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		SCTP_SOCKET_UNLOCK(so, 1);
+#endif
+	}
+}
+#ifdef SCTP_ASOCLOG_OF_TSNS
+void
+sctp_print_out_track_log(struct sctp_tcb *stcb)
+{
+#ifdef NOSIY_PRINTS
+	int i;
+	SCTP_PRINTF("Last ep reason:%x\n", stcb->sctp_ep->last_abort_code);
+	SCTP_PRINTF("IN bound TSN log-aaa\n");
+	if ((stcb->asoc.tsn_in_at == 0) && (stcb->asoc.tsn_in_wrapped == 0)) {
+		SCTP_PRINTF("None rcvd\n");
+		goto none_in;
+	}
+	if (stcb->asoc.tsn_in_wrapped) {
+		for (i = stcb->asoc.tsn_in_at; i < SCTP_TSN_LOG_SIZE; i++) {
+			SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
+				    stcb->asoc.in_tsnlog[i].tsn,
+				    stcb->asoc.in_tsnlog[i].strm,
+				    stcb->asoc.in_tsnlog[i].seq,
+				    stcb->asoc.in_tsnlog[i].flgs,
+				    stcb->asoc.in_tsnlog[i].sz);
+		}
+	}
+	if (stcb->asoc.tsn_in_at) {
+		for (i = 0; i < stcb->asoc.tsn_in_at; i++) {
+			SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
+				    stcb->asoc.in_tsnlog[i].tsn,
+				    stcb->asoc.in_tsnlog[i].strm,
+				    stcb->asoc.in_tsnlog[i].seq,
+				    stcb->asoc.in_tsnlog[i].flgs,
+				    stcb->asoc.in_tsnlog[i].sz);
+		}
+	}
+ none_in:
+	SCTP_PRINTF("OUT bound TSN log-aaa\n");
+	if ((stcb->asoc.tsn_out_at == 0) &&
+	    (stcb->asoc.tsn_out_wrapped == 0)) {
+		SCTP_PRINTF("None sent\n");
+	}
+	if (stcb->asoc.tsn_out_wrapped) {
+		for (i = stcb->asoc.tsn_out_at; i < SCTP_TSN_LOG_SIZE; i++) {
+			SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
+				    stcb->asoc.out_tsnlog[i].tsn,
+				    stcb->asoc.out_tsnlog[i].strm,
+				    stcb->asoc.out_tsnlog[i].seq,
+				    stcb->asoc.out_tsnlog[i].flgs,
+				    stcb->asoc.out_tsnlog[i].sz);
+		}
+	}
+	if (stcb->asoc.tsn_out_at) {
+		for (i = 0; i < stcb->asoc.tsn_out_at; i++) {
+			SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
+				    stcb->asoc.out_tsnlog[i].tsn,
+				    stcb->asoc.out_tsnlog[i].strm,
+				    stcb->asoc.out_tsnlog[i].seq,
+				    stcb->asoc.out_tsnlog[i].flgs,
+				    stcb->asoc.out_tsnlog[i].sz);
+		}
+	}
+#endif
+}
+#endif
+
+void
+sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+                          struct mbuf *op_err, bool timedout, int so_locked)
+{
+#if defined(__APPLE__) && !defined(__Userspace__)
+	struct socket *so;
+#endif
+	struct sctp_gen_error_cause* cause;
+	uint16_t cause_code;
+
+#if defined(__APPLE__) && !defined(__Userspace__)
+	so = SCTP_INP_SO(inp);
+#endif
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	if (stcb == NULL) {
+		/* Got to have a TCB */
+		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
+			if (LIST_EMPTY(&inp->sctp_asoc_list)) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+				if (!so_locked) {
+					SCTP_SOCKET_LOCK(so, 1);
+				}
+#endif
+				sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
+						SCTP_CALLED_DIRECTLY_NOCMPSET);
+#if defined(__APPLE__) && !defined(__Userspace__)
+				if (!so_locked) {
+					SCTP_SOCKET_UNLOCK(so, 1);
+				}
+#endif
+			}
+		}
+		return;
+	}
+	if (op_err != NULL) {
+		/* Read the cause code from the error cause. */
+		cause = mtod(op_err, struct sctp_gen_error_cause *);
+		cause_code = ntohs(cause->code);
+	} else {
+		cause_code = 0;
+	}
+	/* notify the peer */
+	sctp_send_abort_tcb(stcb, op_err, so_locked);
+	SCTP_STAT_INCR_COUNTER32(sctps_aborted);
+	if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
+	    (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
+		SCTP_STAT_DECR_GAUGE32(sctps_currestab);
+	}
+	/* notify the ulp */
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
+		sctp_abort_notification(stcb, false, timedout, cause_code, NULL, so_locked);
+	}
+	/* now free the asoc */
+#ifdef SCTP_ASOCLOG_OF_TSNS
+	sctp_print_out_track_log(stcb);
+#endif
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (!so_locked) {
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		SCTP_TCB_UNLOCK(stcb);
+		SCTP_SOCKET_LOCK(so, 1);
+		SCTP_TCB_LOCK(stcb);
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+	}
+#endif
+	(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+	                      SCTP_FROM_SCTPUTIL + SCTP_LOC_5);
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (!so_locked) {
+		SCTP_SOCKET_UNLOCK(so, 1);
+	}
+#endif
+}
+
+void
+sctp_handle_ootb(struct mbuf *m, int iphlen, int offset,
+                 struct sockaddr *src, struct sockaddr *dst,
+                 struct sctphdr *sh, struct sctp_inpcb *inp,
+                 struct mbuf *cause,
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+                 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
+#endif
+                 uint32_t vrf_id, uint16_t port)
+{
+	struct sctp_chunkhdr *ch, chunk_buf;
+	unsigned int chk_length;
+	int contains_init_chunk;
+
+	SCTP_STAT_INCR_COUNTER32(sctps_outoftheblue);
+	/* Generate a TO address for future reference */
+	if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
+		if (LIST_EMPTY(&inp->sctp_asoc_list)) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+			SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 1);
+#endif
+			sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
+					SCTP_CALLED_DIRECTLY_NOCMPSET);
+#if defined(__APPLE__) && !defined(__Userspace__)
+			SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1);
+#endif
+		}
+	}
+	contains_init_chunk = 0;
+	ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+	    sizeof(*ch), (uint8_t *) & chunk_buf);
+	while (ch != NULL) {
+		chk_length = ntohs(ch->chunk_length);
+		if (chk_length < sizeof(*ch)) {
+			/* break to abort land */
+			break;
+		}
+		switch (ch->chunk_type) {
+		case SCTP_INIT:
+			contains_init_chunk = 1;
+			break;
+		case SCTP_PACKET_DROPPED:
+			/* we don't respond to pkt-dropped */
+			return;
+		case SCTP_ABORT_ASSOCIATION:
+			/* we don't respond with an ABORT to an ABORT */
+			return;
+		case SCTP_SHUTDOWN_COMPLETE:
+			/*
+			 * we ignore it since we are not waiting for it and
+			 * peer is gone
+			 */
+			return;
+		case SCTP_SHUTDOWN_ACK:
+			sctp_send_shutdown_complete2(src, dst, sh,
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+			                             mflowtype, mflowid, fibnum,
+#endif
+			                             vrf_id, port);
+			return;
+		default:
+			break;
+		}
+		offset += SCTP_SIZE32(chk_length);
+		ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+		    sizeof(*ch), (uint8_t *) & chunk_buf);
+	}
+	if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
+	    ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
+	     (contains_init_chunk == 0))) {
+		sctp_send_abort(m, iphlen, src, dst, sh, 0, cause,
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		                mflowtype, mflowid, fibnum,
+#endif
+		                vrf_id, port);
+	}
+}
+
+/*
+ * check the inbound datagram to make sure there is not an abort inside it,
+ * if there is return 1, else return 0.
+ */
+int
+sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t *vtag)
+{
+	struct sctp_chunkhdr *ch;
+	struct sctp_init_chunk *init_chk, chunk_buf;
+	int offset;
+	unsigned int chk_length;
+
+	offset = iphlen + sizeof(struct sctphdr);
+	ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, sizeof(*ch),
+	    (uint8_t *) & chunk_buf);
+	while (ch != NULL) {
+		chk_length = ntohs(ch->chunk_length);
+		if (chk_length < sizeof(*ch)) {
+			/* packet is probably corrupt */
+			break;
+		}
+		/* we seem to be ok, is it an abort? */
+		if (ch->chunk_type == SCTP_ABORT_ASSOCIATION) {
+			/* yep, tell them */
+			return (1);
+		}
+		if ((ch->chunk_type == SCTP_INITIATION) ||
+		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
+			/* need to update the Vtag */
+			init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
+			    offset, sizeof(struct sctp_init_chunk), (uint8_t *) & chunk_buf);
+			if (init_chk != NULL) {
+				*vtag = ntohl(init_chk->init.initiate_tag);
+			}
+		}
+		/* Nope, move to the next chunk */
+		offset += SCTP_SIZE32(chk_length);
+		ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+		    sizeof(*ch), (uint8_t *) & chunk_buf);
+	}
+	return (0);
+}
+
+/*
+ * currently (2/02), ifa_addr embeds scope_id's and don't have sin6_scope_id
+ * set (i.e. it's 0) so, create this function to compare link local scopes
+ */
+#ifdef INET6
+uint32_t
+sctp_is_same_scope(struct sockaddr_in6 *addr1, struct sockaddr_in6 *addr2)
+{
+#if defined(__Userspace__)
+    /*__Userspace__ Returning 1 here always */
+#endif
+#if defined(SCTP_EMBEDDED_V6_SCOPE)
+	struct sockaddr_in6 a, b;
+
+	/* save copies */
+	a = *addr1;
+	b = *addr2;
+
+	if (a.sin6_scope_id == 0)
+#ifdef SCTP_KAME
+		if (sa6_recoverscope(&a)) {
+#else
+		if (in6_recoverscope(&a, &a.sin6_addr, NULL)) {
+#endif				/* SCTP_KAME */
+			/* can't get scope, so can't match */
+			return (0);
+		}
+	if (b.sin6_scope_id == 0)
+#ifdef SCTP_KAME
+		if (sa6_recoverscope(&b)) {
+#else
+		if (in6_recoverscope(&b, &b.sin6_addr, NULL)) {
+#endif				/* SCTP_KAME */
+			/* can't get scope, so can't match */
+			return (0);
+		}
+	if (a.sin6_scope_id != b.sin6_scope_id)
+		return (0);
+#else
+	if (addr1->sin6_scope_id != addr2->sin6_scope_id)
+		return (0);
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+
+	return (1);
+}
+
+#if defined(SCTP_EMBEDDED_V6_SCOPE)
+/*
+ * returns a sockaddr_in6 with embedded scope recovered and removed
+ */
+struct sockaddr_in6 *
+sctp_recover_scope(struct sockaddr_in6 *addr, struct sockaddr_in6 *store)
+{
+	/* check and strip embedded scope junk */
+	if (addr->sin6_family == AF_INET6) {
+		if (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr)) {
+			if (addr->sin6_scope_id == 0) {
+				*store = *addr;
+#ifdef SCTP_KAME
+				if (!sa6_recoverscope(store)) {
+#else
+				if (!in6_recoverscope(store, &store->sin6_addr,
+				    NULL)) {
+#endif /* SCTP_KAME */
+					/* use the recovered scope */
+					addr = store;
+				}
+			} else {
+				/* else, return the original "to" addr */
+				in6_clearscope(&addr->sin6_addr);
+			}
+		}
+	}
+	return (addr);
+}
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+#endif
+
+/*
+ * are the two addresses the same?  currently a "scopeless" check returns: 1
+ * if same, 0 if not
+ */
+int
+sctp_cmpaddr(struct sockaddr *sa1, struct sockaddr *sa2)
+{
+
+	/* must be valid */
+	if (sa1 == NULL || sa2 == NULL)
+		return (0);
+
+	/* must be the same family */
+	if (sa1->sa_family != sa2->sa_family)
+		return (0);
+
+	switch (sa1->sa_family) {
+#ifdef INET6
+	case AF_INET6:
+	{
+		/* IPv6 addresses */
+		struct sockaddr_in6 *sin6_1, *sin6_2;
+
+		sin6_1 = (struct sockaddr_in6 *)sa1;
+		sin6_2 = (struct sockaddr_in6 *)sa2;
+		return (SCTP6_ARE_ADDR_EQUAL(sin6_1,
+		    sin6_2));
+	}
+#endif
+#ifdef INET
+	case AF_INET:
+	{
+		/* IPv4 addresses */
+		struct sockaddr_in *sin_1, *sin_2;
+
+		sin_1 = (struct sockaddr_in *)sa1;
+		sin_2 = (struct sockaddr_in *)sa2;
+		return (sin_1->sin_addr.s_addr == sin_2->sin_addr.s_addr);
+	}
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+	{
+		struct sockaddr_conn *sconn_1, *sconn_2;
+
+		sconn_1 = (struct sockaddr_conn *)sa1;
+		sconn_2 = (struct sockaddr_conn *)sa2;
+		return (sconn_1->sconn_addr == sconn_2->sconn_addr);
+	}
+#endif
+	default:
+		/* we don't do these... */
+		return (0);
+	}
+}
+
+void
+sctp_print_address(struct sockaddr *sa)
+{
+#ifdef INET6
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	char ip6buf[INET6_ADDRSTRLEN];
+#endif
+#endif
+
+	switch (sa->sa_family) {
+#ifdef INET6
+	case AF_INET6:
+	{
+		struct sockaddr_in6 *sin6;
+
+		sin6 = (struct sockaddr_in6 *)sa;
+#if defined(__Userspace__)
+		SCTP_PRINTF("IPv6 address: %x:%x:%x:%x:%x:%x:%x:%x:port:%d scope:%u\n",
+			    ntohs(sin6->sin6_addr.s6_addr16[0]),
+			    ntohs(sin6->sin6_addr.s6_addr16[1]),
+			    ntohs(sin6->sin6_addr.s6_addr16[2]),
+			    ntohs(sin6->sin6_addr.s6_addr16[3]),
+			    ntohs(sin6->sin6_addr.s6_addr16[4]),
+			    ntohs(sin6->sin6_addr.s6_addr16[5]),
+			    ntohs(sin6->sin6_addr.s6_addr16[6]),
+			    ntohs(sin6->sin6_addr.s6_addr16[7]),
+			    ntohs(sin6->sin6_port),
+			    sin6->sin6_scope_id);
+#else
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n",
+			    ip6_sprintf(ip6buf, &sin6->sin6_addr),
+			    ntohs(sin6->sin6_port),
+			    sin6->sin6_scope_id);
+#else
+		SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n",
+			    ip6_sprintf(&sin6->sin6_addr),
+			    ntohs(sin6->sin6_port),
+			    sin6->sin6_scope_id);
+#endif
+#endif
+		break;
+	}
+#endif
+#ifdef INET
+	case AF_INET:
+	{
+		struct sockaddr_in *sin;
+		unsigned char *p;
+
+		sin = (struct sockaddr_in *)sa;
+		p = (unsigned char *)&sin->sin_addr;
+		SCTP_PRINTF("IPv4 address: %u.%u.%u.%u:%d\n",
+			    p[0], p[1], p[2], p[3], ntohs(sin->sin_port));
+		break;
+	}
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+	{
+		struct sockaddr_conn *sconn;
+
+		sconn = (struct sockaddr_conn *)sa;
+		SCTP_PRINTF("AF_CONN address: %p\n", sconn->sconn_addr);
+		break;
+	}
+#endif
+	default:
+		SCTP_PRINTF("?\n");
+		break;
+	}
+}
+
+void
+sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
+    struct sctp_inpcb *new_inp,
+    struct sctp_tcb *stcb,
+    int waitflags)
+{
+	/*
+	 * go through our old INP and pull off any control structures that
+	 * belong to stcb and move then to the new inp.
+	 */
+	struct socket *old_so, *new_so;
+	struct sctp_queued_to_read *control, *nctl;
+	struct sctp_readhead tmp_queue;
+	struct mbuf *m;
+#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
+	int error = 0;
+#endif
+
+	old_so = old_inp->sctp_socket;
+	new_so = new_inp->sctp_socket;
+	TAILQ_INIT(&tmp_queue);
+#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__)
+#if defined(__FreeBSD__)
+	error = SOCK_IO_RECV_LOCK(old_so, waitflags);
+#else
+	error = sblock(&old_so->so_rcv, waitflags);
+#endif
+	if (error) {
+		/* Gak, can't get I/O lock, we have a problem.
+		 * data will be left stranded.. and we
+		 * don't dare look at it since the
+		 * other thread may be reading something.
+		 * Oh well, its a screwed up app that does
+		 * a peeloff OR a accept while reading
+		 * from the main socket... actually its
+		 * only the peeloff() case, since I think
+		 * read will fail on a listening socket..
+		 */
+		return;
+	}
+#endif
+	/* lock the socket buffers */
+	SCTP_INP_READ_LOCK(old_inp);
+	TAILQ_FOREACH_SAFE(control, &old_inp->read_queue, next, nctl) {
+		/* Pull off all for out target stcb */
+		if (control->stcb == stcb) {
+			/* remove it we want it */
+			TAILQ_REMOVE(&old_inp->read_queue, control, next);
+			TAILQ_INSERT_TAIL(&tmp_queue, control, next);
+			m = control->data;
+			while (m) {
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+					sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE,SCTP_BUF_LEN(m));
+				}
+				sctp_sbfree(control, stcb, &old_so->so_rcv, m);
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+					sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
+				}
+				m = SCTP_BUF_NEXT(m);
+			}
+		}
+	}
+	SCTP_INP_READ_UNLOCK(old_inp);
+	/* Remove the recv-lock on the old socket */
+#if defined(__APPLE__) && !defined(__Userspace__)
+	sbunlock(&old_so->so_rcv, 1);
+#endif
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	SOCK_IO_RECV_UNLOCK(old_so);
+#endif
+	/* Now we move them over to the new socket buffer */
+	SCTP_INP_READ_LOCK(new_inp);
+	TAILQ_FOREACH_SAFE(control, &tmp_queue, next, nctl) {
+		TAILQ_INSERT_TAIL(&new_inp->read_queue, control, next);
+		m = control->data;
+		while (m) {
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+				sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
+			}
+			sctp_sballoc(stcb, &new_so->so_rcv, m);
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+				sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
+			}
+			m = SCTP_BUF_NEXT(m);
+		}
+	}
+	SCTP_INP_READ_UNLOCK(new_inp);
+}
+
+void
+sctp_wakeup_the_read_socket(struct sctp_inpcb *inp,
+    struct sctp_tcb *stcb,
+    int so_locked
+#if !(defined(__APPLE__) && !defined(__Userspace__))
+    SCTP_UNUSED
+#endif
+)
+{
+	if ((inp != NULL) &&
+	    (inp->sctp_socket != NULL) &&
+	    (((inp->sctp_flags & (SCTP_PCB_FLAGS_TCPTYPE | SCTP_PCB_FLAGS_IN_TCPPOOL)) == 0) ||
+	     !SCTP_IS_LISTENING(inp))) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+		struct socket *so;
+
+		so = SCTP_INP_SO(inp);
+		if (!so_locked) {
+			if (stcb) {
+				atomic_add_int(&stcb->asoc.refcnt, 1);
+				SCTP_TCB_UNLOCK(stcb);
+			}
+			SCTP_SOCKET_LOCK(so, 1);
+			if (stcb) {
+				SCTP_TCB_LOCK(stcb);
+				atomic_subtract_int(&stcb->asoc.refcnt, 1);
+			}
+			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
+				SCTP_SOCKET_UNLOCK(so, 1);
+				return;
+			}
+		}
+#endif
+		sctp_sorwakeup(inp, inp->sctp_socket);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		if (!so_locked) {
+			SCTP_SOCKET_UNLOCK(so, 1);
+		}
+#endif
+	}
+}
+#if defined(__Userspace__)
+
+void
+sctp_invoke_recv_callback(struct sctp_inpcb *inp,
+                          struct sctp_tcb *stcb,
+                          struct sctp_queued_to_read *control,
+                          int inp_read_lock_held)
+{
+	uint32_t pd_point, length;
+
+	if ((inp->recv_callback == NULL) ||
+	    (stcb == NULL) ||
+	    (stcb->sctp_socket == NULL)) {
+		return;
+	}
+
+	length = control->length;
+	if (stcb != NULL && stcb->sctp_socket != NULL) {
+		pd_point = min(SCTP_SB_LIMIT_RCV(stcb->sctp_socket) >> SCTP_PARTIAL_DELIVERY_SHIFT,
+			       stcb->sctp_ep->partial_delivery_point);
+	} else {
+		pd_point = inp->partial_delivery_point;
+	}
+	if ((control->end_added == 1) || (length >= pd_point)) {
+		struct socket *so;
+		struct mbuf *m;
+		char *buffer;
+		struct sctp_rcvinfo rcv;
+		union sctp_sockstore addr;
+		int flags;
+
+		if ((buffer = malloc(length)) == NULL) {
+			return;
+		}
+		if (inp_read_lock_held == 0) {
+			SCTP_INP_READ_LOCK(inp);
+		}
+		so = stcb->sctp_socket;
+		for (m = control->data; m; m = SCTP_BUF_NEXT(m)) {
+			sctp_sbfree(control, control->stcb, &so->so_rcv, m);
+		}
+		m_copydata(control->data, 0, length, buffer);
+		memset(&rcv, 0, sizeof(struct sctp_rcvinfo));
+		rcv.rcv_sid = control->sinfo_stream;
+		rcv.rcv_ssn = (uint16_t)control->mid;
+		rcv.rcv_flags = control->sinfo_flags;
+		rcv.rcv_ppid = control->sinfo_ppid;
+		rcv.rcv_tsn = control->sinfo_tsn;
+		rcv.rcv_cumtsn = control->sinfo_cumtsn;
+		rcv.rcv_context = control->sinfo_context;
+		rcv.rcv_assoc_id = control->sinfo_assoc_id;
+		memset(&addr, 0, sizeof(union sctp_sockstore));
+		switch (control->whoFrom->ro._l_addr.sa.sa_family) {
+#ifdef INET
+		case AF_INET:
+			addr.sin = control->whoFrom->ro._l_addr.sin;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+			addr.sin6 = control->whoFrom->ro._l_addr.sin6;
+			break;
+#endif
+		case AF_CONN:
+			addr.sconn = control->whoFrom->ro._l_addr.sconn;
+			break;
+		default:
+			addr.sa = control->whoFrom->ro._l_addr.sa;
+			break;
+		}
+		flags = 0;
+		if (control->end_added == 1) {
+			flags |= MSG_EOR;
+		}
+		if (control->spec_flags & M_NOTIFICATION) {
+			flags |= MSG_NOTIFICATION;
+		}
+		sctp_m_freem(control->data);
+		control->data = NULL;
+		control->tail_mbuf = NULL;
+		control->length = 0;
+		if (control->end_added) {
+			TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
+			control->on_read_q = 0;
+			sctp_free_remote_addr(control->whoFrom);
+			control->whoFrom = NULL;
+			sctp_free_a_readq(stcb, control);
+		}
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		SCTP_TCB_UNLOCK(stcb);
+		if (inp_read_lock_held == 0) {
+			SCTP_INP_READ_UNLOCK(inp);
+		}
+		inp->recv_callback(so, addr, buffer, length, rcv, flags, inp->ulp_info);
+		SCTP_TCB_LOCK(stcb);
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+	}
+}
+#endif
+
+void
+sctp_add_to_readq(struct sctp_inpcb *inp,
+    struct sctp_tcb *stcb,
+    struct sctp_queued_to_read *control,
+    struct sockbuf *sb,
+    int end,
+    int inp_read_lock_held,
+    int so_locked)
+{
+	/*
+	 * Here we must place the control on the end of the socket read
+	 * queue AND increment sb_cc so that select will work properly on
+	 * read.
+	 */
+	struct mbuf *m, *prev = NULL;
+
+	if (inp == NULL) {
+		/* Gak, TSNH!! */
+#ifdef INVARIANTS
+		panic("Gak, inp NULL on add_to_readq");
+#endif
+		return;
+	}
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	if (inp_read_lock_held == SCTP_READ_LOCK_NOT_HELD) {
+		SCTP_INP_READ_LOCK(inp);
+	}
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
+		if (!control->on_strm_q) {
+			sctp_free_remote_addr(control->whoFrom);
+			if (control->data) {
+				sctp_m_freem(control->data);
+				control->data = NULL;
+			}
+			sctp_free_a_readq(stcb, control);
+		}
+		if (inp_read_lock_held == SCTP_READ_LOCK_NOT_HELD) {
+			SCTP_INP_READ_UNLOCK(inp);
+		}
+		return;
+	}
+	if ((control->spec_flags & M_NOTIFICATION) == 0) {
+		atomic_add_int(&inp->total_recvs, 1);
+		if (!control->do_not_ref_stcb) {
+			atomic_add_int(&stcb->total_recvs, 1);
+		}
+	}
+	m = control->data;
+	control->held_length = 0;
+	control->length = 0;
+	while (m != NULL) {
+		if (SCTP_BUF_LEN(m) == 0) {
+			/* Skip mbufs with NO length */
+			if (prev == NULL) {
+				/* First one */
+				control->data = sctp_m_free(m);
+				m = control->data;
+			} else {
+				SCTP_BUF_NEXT(prev) = sctp_m_free(m);
+				m = SCTP_BUF_NEXT(prev);
+			}
+			if (m == NULL) {
+				control->tail_mbuf = prev;
+			}
+			continue;
+		}
+		prev = m;
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+			sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
+		}
+		sctp_sballoc(stcb, sb, m);
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+			sctp_sblog(sb, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
+		}
+		atomic_add_int(&control->length, SCTP_BUF_LEN(m));
+		m = SCTP_BUF_NEXT(m);
+	}
+	if (prev != NULL) {
+		control->tail_mbuf = prev;
+	} else {
+		/* Everything got collapsed out?? */
+		if (!control->on_strm_q) {
+			sctp_free_remote_addr(control->whoFrom);
+			sctp_free_a_readq(stcb, control);
+		}
+		if (inp_read_lock_held == 0)
+			SCTP_INP_READ_UNLOCK(inp);
+		return;
+	}
+	if (end) {
+		control->end_added = 1;
+	}
+	TAILQ_INSERT_TAIL(&inp->read_queue, control, next);
+	control->on_read_q = 1;
+#if defined(__Userspace__)
+	sctp_invoke_recv_callback(inp, stcb, control, SCTP_READ_LOCK_HELD);
+#endif
+	if ((inp != NULL) && (inp->sctp_socket != NULL)) {
+		sctp_wakeup_the_read_socket(inp, stcb, so_locked);
+	}
+	if (inp_read_lock_held == SCTP_READ_LOCK_NOT_HELD) {
+		SCTP_INP_READ_UNLOCK(inp);
+	}
+}
+
+/*************HOLD THIS COMMENT FOR PATCH FILE OF
+ *************ALTERNATE ROUTING CODE
+ */
+
+/*************HOLD THIS COMMENT FOR END OF PATCH FILE OF
+ *************ALTERNATE ROUTING CODE
+ */
+
+struct mbuf *
+sctp_generate_cause(uint16_t code, char *info)
+{
+	struct mbuf *m;
+	struct sctp_gen_error_cause *cause;
+	size_t info_len;
+	uint16_t len;
+
+	if ((code == 0) || (info == NULL)) {
+		return (NULL);
+	}
+	info_len = strlen(info);
+	if (info_len > (SCTP_MAX_CAUSE_LENGTH - sizeof(struct sctp_paramhdr))) {
+		return (NULL);
+	}
+	len = (uint16_t)(sizeof(struct sctp_paramhdr) + info_len);
+	m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
+	if (m != NULL) {
+		SCTP_BUF_LEN(m) = len;
+		cause = mtod(m, struct sctp_gen_error_cause *);
+		cause->code = htons(code);
+		cause->length = htons(len);
+		memcpy(cause->info, info, info_len);
+	}
+	return (m);
+}
+
+struct mbuf *
+sctp_generate_no_user_data_cause(uint32_t tsn)
+{
+	struct mbuf *m;
+	struct sctp_error_no_user_data *no_user_data_cause;
+	uint16_t len;
+
+	len = (uint16_t)sizeof(struct sctp_error_no_user_data);
+	m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
+	if (m != NULL) {
+		SCTP_BUF_LEN(m) = len;
+		no_user_data_cause = mtod(m, struct sctp_error_no_user_data *);
+		no_user_data_cause->cause.code = htons(SCTP_CAUSE_NO_USER_DATA);
+		no_user_data_cause->cause.length = htons(len);
+		no_user_data_cause->tsn = htonl(tsn);
+	}
+	return (m);
+}
+
+void
+sctp_free_bufspace(struct sctp_tcb *stcb, struct sctp_association *asoc,
+    struct sctp_tmit_chunk *tp1, int chk_cnt)
+{
+	if (tp1->data == NULL) {
+		return;
+	}
+	atomic_subtract_int(&asoc->chunks_on_out_queue, chk_cnt);
+#ifdef SCTP_MBCNT_LOGGING
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBCNT_LOGGING_ENABLE) {
+		sctp_log_mbcnt(SCTP_LOG_MBCNT_DECREASE,
+		               asoc->total_output_queue_size,
+		               tp1->book_size,
+		               0,
+		               tp1->mbcnt);
+	}
+#endif
+	if (asoc->total_output_queue_size >= tp1->book_size) {
+		atomic_subtract_int(&asoc->total_output_queue_size, tp1->book_size);
+	} else {
+		asoc->total_output_queue_size = 0;
+	}
+	if ((stcb->sctp_socket != NULL) &&
+	    (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) ||
+	     ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)))) {
+		SCTP_SB_DECR(&stcb->sctp_socket->so_snd, tp1->book_size);
+	}
+}
+
+int
+sctp_release_pr_sctp_chunk(struct sctp_tcb *stcb, struct sctp_tmit_chunk *tp1,
+                           uint8_t sent, int so_locked)
+{
+	struct sctp_stream_out *strq;
+	struct sctp_tmit_chunk *chk = NULL, *tp2;
+	struct sctp_stream_queue_pending *sp;
+	uint32_t mid;
+	uint16_t sid;
+	uint8_t foundeom = 0;
+	int ret_sz = 0;
+	int notdone;
+	int do_wakeup_routine = 0;
+
+#if defined(__APPLE__) && !defined(__Userspace__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	}
+#endif
+	SCTP_TCB_LOCK_ASSERT(stcb);
+
+	sid = tp1->rec.data.sid;
+	mid = tp1->rec.data.mid;
+	if (sent || ((tp1->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) {
+		stcb->asoc.abandoned_sent[0]++;
+		stcb->asoc.abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++;
+		stcb->asoc.strmout[sid].abandoned_sent[0]++;
+#if defined(SCTP_DETAILED_STR_STATS)
+		stcb->asoc.strmout[sid].abandoned_sent[PR_SCTP_POLICY(tp1->flags)]++;
+#endif
+	} else {
+		stcb->asoc.abandoned_unsent[0]++;
+		stcb->asoc.abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++;
+		stcb->asoc.strmout[sid].abandoned_unsent[0]++;
+#if defined(SCTP_DETAILED_STR_STATS)
+		stcb->asoc.strmout[sid].abandoned_unsent[PR_SCTP_POLICY(tp1->flags)]++;
+#endif
+	}
+	do {
+		ret_sz += tp1->book_size;
+		if (tp1->data != NULL) {
+			if (tp1->sent < SCTP_DATAGRAM_RESEND) {
+				sctp_flight_size_decrease(tp1);
+				sctp_total_flight_decrease(stcb, tp1);
+			}
+			sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
+			stcb->asoc.peers_rwnd += tp1->send_size;
+			stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
+			if (sent) {
+				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
+			} else {
+				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
+			}
+			if (tp1->data) {
+				sctp_m_freem(tp1->data);
+				tp1->data = NULL;
+			}
+			do_wakeup_routine = 1;
+			if (PR_SCTP_BUF_ENABLED(tp1->flags)) {
+				stcb->asoc.sent_queue_cnt_removeable--;
+			}
+		}
+		tp1->sent = SCTP_FORWARD_TSN_SKIP;
+		if ((tp1->rec.data.rcv_flags & SCTP_DATA_NOT_FRAG) ==
+		    SCTP_DATA_NOT_FRAG) {
+			/* not frag'ed we ae done   */
+			notdone = 0;
+			foundeom = 1;
+		} else if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
+			/* end of frag, we are done */
+			notdone = 0;
+			foundeom = 1;
+		} else {
+			/*
+			 * Its a begin or middle piece, we must mark all of
+			 * it
+			 */
+			notdone = 1;
+			tp1 = TAILQ_NEXT(tp1, sctp_next);
+		}
+	} while (tp1 && notdone);
+	if (foundeom == 0) {
+		/*
+		 * The multi-part message was scattered across the send and
+		 * sent queue.
+		 */
+		TAILQ_FOREACH_SAFE(tp1, &stcb->asoc.send_queue, sctp_next, tp2) {
+			if ((tp1->rec.data.sid != sid) ||
+			    (!SCTP_MID_EQ(stcb->asoc.idata_supported, tp1->rec.data.mid, mid))) {
+				break;
+			}
+			/* save to chk in case we have some on stream out
+			 * queue. If so and we have an un-transmitted one
+			 * we don't have to fudge the TSN.
+			 */
+			chk = tp1;
+			ret_sz += tp1->book_size;
+			sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
+			if (sent) {
+				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
+			} else {
+				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
+			}
+			if (tp1->data) {
+				sctp_m_freem(tp1->data);
+				tp1->data = NULL;
+			}
+			/* No flight involved here book the size to 0 */
+			tp1->book_size = 0;
+			if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
+				foundeom = 1;
+			}
+			do_wakeup_routine = 1;
+			tp1->sent = SCTP_FORWARD_TSN_SKIP;
+			TAILQ_REMOVE(&stcb->asoc.send_queue, tp1, sctp_next);
+			/* on to the sent queue so we can wait for it to be passed by. */
+			TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, tp1,
+					  sctp_next);
+			stcb->asoc.send_queue_cnt--;
+			stcb->asoc.sent_queue_cnt++;
+		}
+	}
+	if (foundeom == 0) {
+		/*
+		 * Still no eom found. That means there
+		 * is stuff left on the stream out queue.. yuck.
+		 */
+		strq = &stcb->asoc.strmout[sid];
+		sp = TAILQ_FIRST(&strq->outqueue);
+		if (sp != NULL) {
+			sp->discard_rest = 1;
+			/*
+			 * We may need to put a chunk on the
+			 * queue that holds the TSN that
+			 * would have been sent with the LAST
+			 * bit.
+			 */
+			if (chk == NULL) {
+				/* Yep, we have to */
+				sctp_alloc_a_chunk(stcb, chk);
+				if (chk == NULL) {
+					/* we are hosed. All we can
+					 * do is nothing.. which will
+					 * cause an abort if the peer is
+					 * paying attention.
+					 */
+					goto oh_well;
+				}
+				memset(chk, 0, sizeof(*chk));
+				chk->rec.data.rcv_flags = 0;
+				chk->sent = SCTP_FORWARD_TSN_SKIP;
+				chk->asoc = &stcb->asoc;
+				if (stcb->asoc.idata_supported == 0) {
+					if (sp->sinfo_flags & SCTP_UNORDERED) {
+						chk->rec.data.mid = 0;
+					} else {
+						chk->rec.data.mid = strq->next_mid_ordered;
+					}
+				} else {
+					if (sp->sinfo_flags & SCTP_UNORDERED) {
+						chk->rec.data.mid = strq->next_mid_unordered;
+					} else {
+						chk->rec.data.mid = strq->next_mid_ordered;
+					}
+				}
+				chk->rec.data.sid = sp->sid;
+				chk->rec.data.ppid = sp->ppid;
+				chk->rec.data.context = sp->context;
+				chk->flags = sp->act_flags;
+				chk->whoTo = NULL;
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+				chk->rec.data.tsn = atomic_fetchadd_int(&stcb->asoc.sending_seq, 1);
+#else
+				chk->rec.data.tsn = stcb->asoc.sending_seq++;
+#endif
+				strq->chunks_on_queues++;
+				TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, chk, sctp_next);
+				stcb->asoc.sent_queue_cnt++;
+				stcb->asoc.pr_sctp_cnt++;
+			}
+			chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG;
+			if (sp->sinfo_flags & SCTP_UNORDERED) {
+				chk->rec.data.rcv_flags |= SCTP_DATA_UNORDERED;
+			}
+			if (stcb->asoc.idata_supported == 0) {
+				if ((sp->sinfo_flags & SCTP_UNORDERED) == 0) {
+					strq->next_mid_ordered++;
+				}
+			} else {
+				if (sp->sinfo_flags & SCTP_UNORDERED) {
+					strq->next_mid_unordered++;
+				} else {
+					strq->next_mid_ordered++;
+				}
+			}
+		oh_well:
+			if (sp->data) {
+				/* Pull any data to free up the SB and
+				 * allow sender to "add more" while we
+				 * will throw away :-)
+				 */
+				sctp_free_spbufspace(stcb, &stcb->asoc, sp);
+				ret_sz += sp->length;
+				do_wakeup_routine = 1;
+				sp->some_taken = 1;
+				sctp_m_freem(sp->data);
+				sp->data = NULL;
+				sp->tail_mbuf = NULL;
+				sp->length = 0;
+			}
+		}
+	}
+	if (do_wakeup_routine) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+		struct socket *so;
+
+		so = SCTP_INP_SO(stcb->sctp_ep);
+		if (!so_locked) {
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+			SCTP_TCB_UNLOCK(stcb);
+			SCTP_SOCKET_LOCK(so, 1);
+			SCTP_TCB_LOCK(stcb);
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+			if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
+				/* assoc was freed while we were unlocked */
+				SCTP_SOCKET_UNLOCK(so, 1);
+				return (ret_sz);
+			}
+		}
+#endif
+		sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket);
+#if defined(__APPLE__) && !defined(__Userspace__)
+		if (!so_locked) {
+			SCTP_SOCKET_UNLOCK(so, 1);
+		}
+#endif
+	}
+	return (ret_sz);
+}
+
+/*
+ * checks to see if the given address, sa, is one that is currently known by
+ * the kernel note: can't distinguish the same address on multiple interfaces
+ * and doesn't handle multiple addresses with different zone/scope id's note:
+ * ifa_ifwithaddr() compares the entire sockaddr struct
+ */
+struct sctp_ifa *
+sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr,
+		    int holds_lock)
+{
+	struct sctp_laddr *laddr;
+
+	if (holds_lock == 0) {
+		SCTP_INP_RLOCK(inp);
+	}
+
+	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+		if (laddr->ifa == NULL)
+			continue;
+		if (addr->sa_family != laddr->ifa->address.sa.sa_family)
+			continue;
+#ifdef INET
+		if (addr->sa_family == AF_INET) {
+			if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
+			    laddr->ifa->address.sin.sin_addr.s_addr) {
+				/* found him. */
+				break;
+			}
+		}
+#endif
+#ifdef INET6
+		if (addr->sa_family == AF_INET6) {
+			if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
+						 &laddr->ifa->address.sin6)) {
+				/* found him. */
+				break;
+			}
+		}
+#endif
+#if defined(__Userspace__)
+		if (addr->sa_family == AF_CONN) {
+			if (((struct sockaddr_conn *)addr)->sconn_addr == laddr->ifa->address.sconn.sconn_addr) {
+				/* found him. */
+				break;
+			}
+		}
+#endif
+	}
+	if (holds_lock == 0) {
+		SCTP_INP_RUNLOCK(inp);
+	}
+	if (laddr != NULL) {
+		return (laddr->ifa);
+	} else {
+		return (NULL);
+	}
+}
+
+uint32_t
+sctp_get_ifa_hash_val(struct sockaddr *addr)
+{
+	switch (addr->sa_family) {
+#ifdef INET
+	case AF_INET:
+	{
+		struct sockaddr_in *sin;
+
+		sin = (struct sockaddr_in *)addr;
+		return (sin->sin_addr.s_addr ^ (sin->sin_addr.s_addr >> 16));
+	}
+#endif
+#ifdef INET6
+	case AF_INET6:
+	{
+		struct sockaddr_in6 *sin6;
+		uint32_t hash_of_addr;
+
+		sin6 = (struct sockaddr_in6 *)addr;
+#if !defined(_WIN32) && !(defined(__FreeBSD__) && defined(__Userspace__)) && !defined(__APPLE__)
+		hash_of_addr = (sin6->sin6_addr.s6_addr32[0] +
+				sin6->sin6_addr.s6_addr32[1] +
+				sin6->sin6_addr.s6_addr32[2] +
+				sin6->sin6_addr.s6_addr32[3]);
+#else
+		hash_of_addr = (((uint32_t *)&sin6->sin6_addr)[0] +
+				((uint32_t *)&sin6->sin6_addr)[1] +
+				((uint32_t *)&sin6->sin6_addr)[2] +
+				((uint32_t *)&sin6->sin6_addr)[3]);
+#endif
+		hash_of_addr = (hash_of_addr ^ (hash_of_addr >> 16));
+		return (hash_of_addr);
+	}
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+	{
+		struct sockaddr_conn *sconn;
+		uintptr_t temp;
+
+		sconn = (struct sockaddr_conn *)addr;
+		temp = (uintptr_t)sconn->sconn_addr;
+		return ((uint32_t)(temp ^ (temp >> 16)));
+	}
+#endif
+	default:
+		break;
+	}
+	return (0);
+}
+
+struct sctp_ifa *
+sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock)
+{
+	struct sctp_ifa *sctp_ifap;
+	struct sctp_vrf *vrf;
+	struct sctp_ifalist *hash_head;
+	uint32_t hash_of_addr;
+
+	if (holds_lock == 0) {
+		SCTP_IPI_ADDR_RLOCK();
+	} else {
+		SCTP_IPI_ADDR_LOCK_ASSERT();
+	}
+
+	vrf = sctp_find_vrf(vrf_id);
+	if (vrf == NULL) {
+		if (holds_lock == 0)
+			SCTP_IPI_ADDR_RUNLOCK();
+		return (NULL);
+	}
+
+	hash_of_addr = sctp_get_ifa_hash_val(addr);
+
+	hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
+	if (hash_head == NULL) {
+		SCTP_PRINTF("hash_of_addr:%x mask:%x table:%x - ",
+			    hash_of_addr, (uint32_t)vrf->vrf_addr_hashmark,
+			    (uint32_t)(hash_of_addr & vrf->vrf_addr_hashmark));
+		sctp_print_address(addr);
+		SCTP_PRINTF("No such bucket for address\n");
+		if (holds_lock == 0)
+			SCTP_IPI_ADDR_RUNLOCK();
+
+		return (NULL);
+	}
+	LIST_FOREACH(sctp_ifap, hash_head, next_bucket) {
+		if (addr->sa_family != sctp_ifap->address.sa.sa_family)
+			continue;
+#ifdef INET
+		if (addr->sa_family == AF_INET) {
+			if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
+			    sctp_ifap->address.sin.sin_addr.s_addr) {
+				/* found him. */
+				break;
+			}
+		}
+#endif
+#ifdef INET6
+		if (addr->sa_family == AF_INET6) {
+			if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
+						 &sctp_ifap->address.sin6)) {
+				/* found him. */
+				break;
+			}
+		}
+#endif
+#if defined(__Userspace__)
+		if (addr->sa_family == AF_CONN) {
+			if (((struct sockaddr_conn *)addr)->sconn_addr == sctp_ifap->address.sconn.sconn_addr) {
+				/* found him. */
+				break;
+			}
+		}
+#endif
+	}
+	if (holds_lock == 0)
+		SCTP_IPI_ADDR_RUNLOCK();
+	return (sctp_ifap);
+}
+
+static void
+sctp_user_rcvd(struct sctp_tcb *stcb, uint32_t *freed_so_far, int hold_rlock,
+	       uint32_t rwnd_req)
+{
+	/* User pulled some data, do we need a rwnd update? */
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	struct epoch_tracker et;
+#endif
+	int r_unlocked = 0;
+	uint32_t dif, rwnd;
+	struct socket *so = NULL;
+
+	if (stcb == NULL)
+		return;
+
+	atomic_add_int(&stcb->asoc.refcnt, 1);
+
+	if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+	    (stcb->asoc.state & (SCTP_STATE_ABOUT_TO_BE_FREED | SCTP_STATE_SHUTDOWN_RECEIVED))) {
+		/* Pre-check If we are freeing no update */
+		goto no_lock;
+	}
+	SCTP_INP_INCR_REF(stcb->sctp_ep);
+	if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+	    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
+		goto out;
+	}
+	so = stcb->sctp_socket;
+	if (so == NULL) {
+		goto out;
+	}
+	atomic_add_int(&stcb->freed_by_sorcv_sincelast, *freed_so_far);
+	/* Have you have freed enough to look */
+	*freed_so_far = 0;
+	/* Yep, its worth a look and the lock overhead */
+
+	/* Figure out what the rwnd would be */
+	rwnd = sctp_calc_rwnd(stcb, &stcb->asoc);
+	if (rwnd >= stcb->asoc.my_last_reported_rwnd) {
+		dif = rwnd - stcb->asoc.my_last_reported_rwnd;
+	} else {
+		dif = 0;
+	}
+	if (dif >= rwnd_req) {
+		if (hold_rlock) {
+			SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
+			r_unlocked = 1;
+		}
+		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+			/*
+			 * One last check before we allow the guy possibly
+			 * to get in. There is a race, where the guy has not
+			 * reached the gate. In that case
+			 */
+			goto out;
+		}
+		SCTP_TCB_LOCK(stcb);
+		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+			/* No reports here */
+			SCTP_TCB_UNLOCK(stcb);
+			goto out;
+		}
+		SCTP_STAT_INCR(sctps_wu_sacks_sent);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		NET_EPOCH_ENTER(et);
+#endif
+		sctp_send_sack(stcb, SCTP_SO_LOCKED);
+
+		sctp_chunk_output(stcb->sctp_ep, stcb,
+				  SCTP_OUTPUT_FROM_USR_RCVD, SCTP_SO_LOCKED);
+		/* make sure no timer is running */
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+		NET_EPOCH_EXIT(et);
+#endif
+		sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
+		                SCTP_FROM_SCTPUTIL + SCTP_LOC_6);
+		SCTP_TCB_UNLOCK(stcb);
+	} else {
+		/* Update how much we have pending */
+		stcb->freed_by_sorcv_sincelast = dif;
+	}
+ out:
+	if (so && r_unlocked && hold_rlock) {
+		SCTP_INP_READ_LOCK(stcb->sctp_ep);
+	}
+
+	SCTP_INP_DECR_REF(stcb->sctp_ep);
+ no_lock:
+	atomic_subtract_int(&stcb->asoc.refcnt, 1);
+	return;
+}
+
+int
+sctp_sorecvmsg(struct socket *so,
+    struct uio *uio,
+    struct mbuf **mp,
+    struct sockaddr *from,
+    int fromlen,
+    int *msg_flags,
+    struct sctp_sndrcvinfo *sinfo,
+    int filling_sinfo)
+{
+	/*
+	 * MSG flags we will look at MSG_DONTWAIT - non-blocking IO.
+	 * MSG_PEEK - Look don't touch :-D (only valid with OUT mbuf copy
+	 * mp=NULL thus uio is the copy method to userland) MSG_WAITALL - ??
+	 * On the way out we may send out any combination of:
+	 * MSG_NOTIFICATION MSG_EOR
+	 *
+	 */
+	struct sctp_inpcb *inp = NULL;
+	ssize_t my_len = 0;
+	ssize_t cp_len = 0;
+	int error = 0;
+	struct sctp_queued_to_read *control = NULL, *ctl = NULL, *nxt = NULL;
+	struct mbuf *m = NULL;
+	struct sctp_tcb *stcb = NULL;
+	int wakeup_read_socket = 0;
+	int freecnt_applied = 0;
+	int out_flags = 0, in_flags = 0;
+	int block_allowed = 1;
+	uint32_t freed_so_far = 0;
+	ssize_t copied_so_far = 0;
+	int in_eeor_mode = 0;
+	int no_rcv_needed = 0;
+	uint32_t rwnd_req = 0;
+	int hold_sblock = 0;
+	int hold_rlock = 0;
+	ssize_t slen = 0;
+	uint32_t held_length = 0;
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	int sockbuf_lock = 0;
+#endif
+
+	if (uio == NULL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		return (EINVAL);
+	}
+
+	if (msg_flags) {
+		in_flags = *msg_flags;
+		if (in_flags & MSG_PEEK)
+			SCTP_STAT_INCR(sctps_read_peeks);
+	} else {
+		in_flags = 0;
+	}
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+	slen = uio->uio_resid;
+#else
+	slen = uio_resid(uio);
+#endif
+#else
+	slen = uio->uio_resid;
+#endif
+
+	/* Pull in and set up our int flags */
+	if (in_flags & MSG_OOB) {
+		/* Out of band's NOT supported */
+		return (EOPNOTSUPP);
+	}
+	if ((in_flags & MSG_PEEK) && (mp != NULL)) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		return (EINVAL);
+	}
+	if ((in_flags & (MSG_DONTWAIT
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+			 | MSG_NBIO
+#endif
+		     )) ||
+	    SCTP_SO_IS_NBIO(so)) {
+		block_allowed = 0;
+	}
+	/* setup the endpoint */
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EFAULT);
+		return (EFAULT);
+	}
+	rwnd_req = (SCTP_SB_LIMIT_RCV(so) >> SCTP_RWND_HIWAT_SHIFT);
+	/* Must be at least a MTU's worth */
+	if (rwnd_req < SCTP_MIN_RWND)
+		rwnd_req = SCTP_MIN_RWND;
+	in_eeor_mode = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+		sctp_misc_ints(SCTP_SORECV_ENTER,
+		               rwnd_req, in_eeor_mode, SCTP_SBAVAIL(&so->so_rcv), uio->uio_resid);
+#else
+		sctp_misc_ints(SCTP_SORECV_ENTER,
+		               rwnd_req, in_eeor_mode, SCTP_SBAVAIL(&so->so_rcv), uio_resid(uio));
+#endif
+#else
+		sctp_misc_ints(SCTP_SORECV_ENTER,
+		               rwnd_req, in_eeor_mode, SCTP_SBAVAIL(&so->so_rcv), (uint32_t)uio->uio_resid);
+#endif
+	}
+#if defined(__Userspace__)
+	SOCKBUF_LOCK(&so->so_rcv);
+	hold_sblock = 1;
+#endif
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) &SCTP_RECV_RWND_LOGGING_ENABLE) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+		sctp_misc_ints(SCTP_SORECV_ENTERPL,
+		               rwnd_req, block_allowed, SCTP_SBAVAIL(&so->so_rcv), uio->uio_resid);
+#else
+		sctp_misc_ints(SCTP_SORECV_ENTERPL,
+		               rwnd_req, block_allowed, SCTP_SBAVAIL(&so->so_rcv), uio_resid(uio));
+#endif
+#else
+		sctp_misc_ints(SCTP_SORECV_ENTERPL,
+		               rwnd_req, block_allowed, SCTP_SBAVAIL(&so->so_rcv), (uint32_t)uio->uio_resid);
+#endif
+	}
+
+#if defined(__APPLE__) && !defined(__Userspace__)
+	error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags));
+#endif
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	error = SOCK_IO_RECV_LOCK(so, SBLOCKWAIT(in_flags));
+#endif
+	if (error) {
+		goto release_unlocked;
+	}
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	sockbuf_lock = 1;
+#endif
+ restart:
+#if defined(__Userspace__)
+	if (hold_sblock == 0) {
+		SOCKBUF_LOCK(&so->so_rcv);
+		hold_sblock = 1;
+	}
+#endif
+#if defined(__APPLE__) && !defined(__Userspace__)
+	sbunlock(&so->so_rcv, 1);
+#endif
+
+ restart_nosblocks:
+	if (hold_sblock == 0) {
+		SOCKBUF_LOCK(&so->so_rcv);
+		hold_sblock = 1;
+	}
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
+		goto out;
+	}
+#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
+	if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && SCTP_SBAVAIL(&so->so_rcv) == 0) {
+#else
+	if ((so->so_state & SS_CANTRCVMORE) && SCTP_SBAVAIL(&so->so_rcv) == 0) {
+#endif
+		if (so->so_error) {
+			error = so->so_error;
+			if ((in_flags & MSG_PEEK) == 0)
+				so->so_error = 0;
+			goto out;
+		} else {
+			if (SCTP_SBAVAIL(&so->so_rcv) == 0) {
+				/* indicate EOF */
+				error = 0;
+				goto out;
+			}
+		}
+	}
+	if (SCTP_SBAVAIL(&so->so_rcv) <= held_length) {
+		if (so->so_error) {
+			error = so->so_error;
+			if ((in_flags & MSG_PEEK) == 0) {
+				so->so_error = 0;
+			}
+			goto out;
+		}
+		if ((SCTP_SBAVAIL(&so->so_rcv) == 0) &&
+		    ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+		     (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
+			if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
+				/* For active open side clear flags for re-use
+				 * passive open is blocked by connect.
+				 */
+				if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) {
+					/* You were aborted, passive side always hits here */
+					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
+					error = ECONNRESET;
+				}
+				so->so_state &= ~(SS_ISCONNECTING |
+						  SS_ISDISCONNECTING |
+						  SS_ISCONFIRMING |
+						  SS_ISCONNECTED);
+				if (error == 0) {
+					if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
+						SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN);
+						error = ENOTCONN;
+					}
+				}
+				goto out;
+			}
+		}
+		if (block_allowed) {
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+			error = sbwait(so, SO_RCV);
+#else
+			error = sbwait(&so->so_rcv);
+#endif
+			if (error) {
+				goto out;
+			}
+			held_length = 0;
+			goto restart_nosblocks;
+		} else {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EWOULDBLOCK);
+			error = EWOULDBLOCK;
+			goto out;
+		}
+	}
+	if (hold_sblock == 1) {
+		SOCKBUF_UNLOCK(&so->so_rcv);
+		hold_sblock = 0;
+	}
+#if defined(__APPLE__) && !defined(__Userspace__)
+	error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags));
+#endif
+	/* we possibly have data we can read */
+	/*sa_ignore FREED_MEMORY*/
+	control = TAILQ_FIRST(&inp->read_queue);
+	if (control == NULL) {
+		/* This could be happening since
+		 * the appender did the increment but as not
+		 * yet did the tailq insert onto the read_queue
+		 */
+		if (hold_rlock == 0) {
+			SCTP_INP_READ_LOCK(inp);
+		}
+		control = TAILQ_FIRST(&inp->read_queue);
+		if ((control == NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0)) {
+#ifdef INVARIANTS
+			panic("Huh, its non zero and nothing on control?");
+#endif
+			SCTP_SB_CLEAR(so->so_rcv);
+		}
+		SCTP_INP_READ_UNLOCK(inp);
+		hold_rlock = 0;
+		goto restart;
+	}
+
+	if ((control->length == 0) &&
+	    (control->do_not_ref_stcb)) {
+		/* Clean up code for freeing assoc that left behind a pdapi..
+		 * maybe a peer in EEOR that just closed after sending and
+		 * never indicated a EOR.
+		 */
+		if (hold_rlock == 0) {
+			hold_rlock = 1;
+			SCTP_INP_READ_LOCK(inp);
+		}
+		control->held_length = 0;
+		if (control->data) {
+			/* Hmm there is data here .. fix */
+			struct mbuf *m_tmp;
+			int cnt = 0;
+			m_tmp = control->data;
+			while (m_tmp) {
+				cnt += SCTP_BUF_LEN(m_tmp);
+				if (SCTP_BUF_NEXT(m_tmp) == NULL) {
+					control->tail_mbuf = m_tmp;
+					control->end_added = 1;
+				}
+				m_tmp = SCTP_BUF_NEXT(m_tmp);
+			}
+			control->length = cnt;
+		} else {
+			/* remove it */
+			TAILQ_REMOVE(&inp->read_queue, control, next);
+			/* Add back any hidden data */
+			sctp_free_remote_addr(control->whoFrom);
+			sctp_free_a_readq(stcb, control);
+		}
+		if (hold_rlock) {
+			hold_rlock = 0;
+			SCTP_INP_READ_UNLOCK(inp);
+		}
+		goto restart;
+	}
+	if ((control->length == 0) &&
+	    (control->end_added == 1)) {
+		/* Do we also need to check for (control->pdapi_aborted == 1)? */
+		if (hold_rlock == 0) {
+			hold_rlock = 1;
+			SCTP_INP_READ_LOCK(inp);
+		}
+		TAILQ_REMOVE(&inp->read_queue, control, next);
+		if (control->data) {
+#ifdef INVARIANTS
+			panic("control->data not null but control->length == 0");
+#else
+			SCTP_PRINTF("Strange, data left in the control buffer. Cleaning up.\n");
+			sctp_m_freem(control->data);
+			control->data = NULL;
+#endif
+		}
+		if (control->aux_data) {
+			sctp_m_free (control->aux_data);
+			control->aux_data = NULL;
+		}
+#ifdef INVARIANTS
+		if (control->on_strm_q) {
+			panic("About to free ctl:%p so:%p and its in %d",
+			      control, so, control->on_strm_q);
+		}
+#endif
+		sctp_free_remote_addr(control->whoFrom);
+		sctp_free_a_readq(stcb, control);
+		if (hold_rlock) {
+			hold_rlock = 0;
+			SCTP_INP_READ_UNLOCK(inp);
+		}
+		goto restart;
+	}
+	if (control->length == 0) {
+		if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) &&
+		    (filling_sinfo)) {
+			/* find a more suitable one then this */
+			ctl = TAILQ_NEXT(control, next);
+			while (ctl) {
+				if ((ctl->stcb != control->stcb) && (ctl->length) &&
+				    (ctl->some_taken ||
+				     (ctl->spec_flags & M_NOTIFICATION) ||
+				     ((ctl->do_not_ref_stcb == 0) &&
+				      (ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))
+					) {
+					/*-
+					 * If we have a different TCB next, and there is data
+					 * present. If we have already taken some (pdapi), OR we can
+					 * ref the tcb and no delivery as started on this stream, we
+					 * take it. Note we allow a notification on a different
+					 * assoc to be delivered..
+					 */
+					control = ctl;
+					goto found_one;
+				} else if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS)) &&
+					   (ctl->length) &&
+					   ((ctl->some_taken) ||
+					    ((ctl->do_not_ref_stcb == 0) &&
+					     ((ctl->spec_flags & M_NOTIFICATION) == 0) &&
+					     (ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))) {
+					/*-
+					 * If we have the same tcb, and there is data present, and we
+					 * have the strm interleave feature present. Then if we have
+					 * taken some (pdapi) or we can refer to tht tcb AND we have
+					 * not started a delivery for this stream, we can take it.
+					 * Note we do NOT allow a notification on the same assoc to
+					 * be delivered.
+					 */
+					control = ctl;
+					goto found_one;
+				}
+				ctl = TAILQ_NEXT(ctl, next);
+			}
+		}
+		/*
+		 * if we reach here, not suitable replacement is available
+		 * <or> fragment interleave is NOT on. So stuff the sb_cc
+		 * into the our held count, and its time to sleep again.
+		 */
+		held_length = SCTP_SBAVAIL(&so->so_rcv);
+		control->held_length = SCTP_SBAVAIL(&so->so_rcv);
+		goto restart;
+	}
+	/* Clear the held length since there is something to read */
+	control->held_length = 0;
+ found_one:
+	/*
+	 * If we reach here, control has a some data for us to read off.
+	 * Note that stcb COULD be NULL.
+	 */
+	if (hold_rlock == 0) {
+		hold_rlock = 1;
+		SCTP_INP_READ_LOCK(inp);
+	}
+	control->some_taken++;
+	stcb = control->stcb;
+	if (stcb) {
+		if ((control->do_not_ref_stcb == 0) &&
+		    (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
+			if (freecnt_applied == 0)
+				stcb = NULL;
+		} else if (control->do_not_ref_stcb == 0) {
+			/* you can't free it on me please */
+			/*
+			 * The lock on the socket buffer protects us so the
+			 * free code will stop. But since we used the socketbuf
+			 * lock and the sender uses the tcb_lock to increment,
+			 * we need to use the atomic add to the refcnt
+			 */
+			if (freecnt_applied) {
+#ifdef INVARIANTS
+				panic("refcnt already incremented");
+#else
+				SCTP_PRINTF("refcnt already incremented?\n");
+#endif
+			} else {
+				atomic_add_int(&stcb->asoc.refcnt, 1);
+				freecnt_applied = 1;
+			}
+			/*
+			 * Setup to remember how much we have not yet told
+			 * the peer our rwnd has opened up. Note we grab
+			 * the value from the tcb from last time.
+			 * Note too that sack sending clears this when a sack
+			 * is sent, which is fine. Once we hit the rwnd_req,
+			 * we then will go to the sctp_user_rcvd() that will
+			 * not lock until it KNOWs it MUST send a WUP-SACK.
+			 */
+			freed_so_far = (uint32_t)stcb->freed_by_sorcv_sincelast;
+			stcb->freed_by_sorcv_sincelast = 0;
+		}
+	}
+	if (stcb &&
+	    ((control->spec_flags & M_NOTIFICATION) == 0) &&
+	    control->do_not_ref_stcb == 0) {
+		stcb->asoc.strmin[control->sinfo_stream].delivery_started = 1;
+	}
+
+	/* First lets get off the sinfo and sockaddr info */
+	if ((sinfo != NULL) && (filling_sinfo != 0)) {
+		sinfo->sinfo_stream = control->sinfo_stream;
+		sinfo->sinfo_ssn = (uint16_t)control->mid;
+		sinfo->sinfo_flags = control->sinfo_flags;
+		sinfo->sinfo_ppid = control->sinfo_ppid;
+		sinfo->sinfo_context =control->sinfo_context;
+		sinfo->sinfo_timetolive = control->sinfo_timetolive;
+		sinfo->sinfo_tsn = control->sinfo_tsn;
+		sinfo->sinfo_cumtsn = control->sinfo_cumtsn;
+		sinfo->sinfo_assoc_id = control->sinfo_assoc_id;
+		nxt = TAILQ_NEXT(control, next);
+		if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
+		    sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) {
+			struct sctp_extrcvinfo *s_extra;
+			s_extra = (struct sctp_extrcvinfo *)sinfo;
+			if ((nxt) &&
+			    (nxt->length)) {
+				s_extra->serinfo_next_flags = SCTP_NEXT_MSG_AVAIL;
+				if (nxt->sinfo_flags & SCTP_UNORDERED) {
+					s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_IS_UNORDERED;
+				}
+				if (nxt->spec_flags & M_NOTIFICATION) {
+					s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_IS_NOTIFICATION;
+				}
+				s_extra->serinfo_next_aid = nxt->sinfo_assoc_id;
+				s_extra->serinfo_next_length = nxt->length;
+				s_extra->serinfo_next_ppid = nxt->sinfo_ppid;
+				s_extra->serinfo_next_stream = nxt->sinfo_stream;
+				if (nxt->tail_mbuf != NULL) {
+					if (nxt->end_added) {
+						s_extra->serinfo_next_flags |= SCTP_NEXT_MSG_ISCOMPLETE;
+					}
+				}
+			} else {
+				/* we explicitly 0 this, since the memcpy got
+				 * some other things beyond the older sinfo_
+				 * that is on the control's structure :-D
+				 */
+				nxt = NULL;
+				s_extra->serinfo_next_flags = SCTP_NO_NEXT_MSG;
+				s_extra->serinfo_next_aid = 0;
+				s_extra->serinfo_next_length = 0;
+				s_extra->serinfo_next_ppid = 0;
+				s_extra->serinfo_next_stream = 0;
+			}
+		}
+		/*
+		 * update off the real current cum-ack, if we have an stcb.
+		 */
+		if ((control->do_not_ref_stcb == 0) && stcb)
+			sinfo->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
+		/*
+		 * mask off the high bits, we keep the actual chunk bits in
+		 * there.
+		 */
+		sinfo->sinfo_flags &= 0x00ff;
+		if ((control->sinfo_flags >> 8) & SCTP_DATA_UNORDERED) {
+			sinfo->sinfo_flags |= SCTP_UNORDERED;
+		}
+	}
+#ifdef SCTP_ASOCLOG_OF_TSNS
+	{
+		int index, newindex;
+		struct sctp_pcbtsn_rlog *entry;
+		do {
+			index = inp->readlog_index;
+			newindex = index + 1;
+			if (newindex >= SCTP_READ_LOG_SIZE) {
+				newindex = 0;
+			}
+		} while (atomic_cmpset_int(&inp->readlog_index, index, newindex) == 0);
+		entry = &inp->readlog[index];
+		entry->vtag = control->sinfo_assoc_id;
+		entry->strm = control->sinfo_stream;
+		entry->seq = (uint16_t)control->mid;
+		entry->sz = control->length;
+		entry->flgs = control->sinfo_flags;
+	}
+#endif
+	if ((fromlen > 0) && (from != NULL)) {
+		union sctp_sockstore store;
+		size_t len;
+
+		switch (control->whoFrom->ro._l_addr.sa.sa_family) {
+#ifdef INET6
+			case AF_INET6:
+				len = sizeof(struct sockaddr_in6);
+				store.sin6 = control->whoFrom->ro._l_addr.sin6;
+				store.sin6.sin6_port = control->port_from;
+				break;
+#endif
+#ifdef INET
+			case AF_INET:
+#ifdef INET6
+				if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) {
+					len = sizeof(struct sockaddr_in6);
+					in6_sin_2_v4mapsin6(&control->whoFrom->ro._l_addr.sin,
+							    &store.sin6);
+					store.sin6.sin6_port = control->port_from;
+				} else {
+					len = sizeof(struct sockaddr_in);
+					store.sin = control->whoFrom->ro._l_addr.sin;
+					store.sin.sin_port = control->port_from;
+				}
+#else
+				len = sizeof(struct sockaddr_in);
+				store.sin = control->whoFrom->ro._l_addr.sin;
+				store.sin.sin_port = control->port_from;
+#endif
+				break;
+#endif
+#if defined(__Userspace__)
+			case AF_CONN:
+				len = sizeof(struct sockaddr_conn);
+				store.sconn = control->whoFrom->ro._l_addr.sconn;
+				store.sconn.sconn_port = control->port_from;
+				break;
+#endif
+			default:
+				len = 0;
+				break;
+		}
+		memcpy(from, &store, min((size_t)fromlen, len));
+#if defined(SCTP_EMBEDDED_V6_SCOPE)
+#ifdef INET6
+		{
+			struct sockaddr_in6 lsa6, *from6;
+
+			from6 = (struct sockaddr_in6 *)from;
+			sctp_recover_scope_mac(from6, (&lsa6));
+		}
+#endif
+#endif
+	}
+	if (hold_rlock) {
+		SCTP_INP_READ_UNLOCK(inp);
+		hold_rlock = 0;
+	}
+	if (hold_sblock) {
+		SOCKBUF_UNLOCK(&so->so_rcv);
+		hold_sblock = 0;
+	}
+	/* now copy out what data we can */
+	if (mp == NULL) {
+		/* copy out each mbuf in the chain up to length */
+	get_more_data:
+		m = control->data;
+		while (m) {
+			/* Move out all we can */
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+			cp_len = uio->uio_resid;
+#else
+			cp_len = uio_resid(uio);
+#endif
+#else
+			cp_len = uio->uio_resid;
+#endif
+			my_len = SCTP_BUF_LEN(m);
+			if (cp_len > my_len) {
+				/* not enough in this buf */
+				cp_len = my_len;
+			}
+			if (hold_rlock) {
+				SCTP_INP_READ_UNLOCK(inp);
+				hold_rlock = 0;
+			}
+#if defined(__APPLE__) && !defined(__Userspace__)
+			SCTP_SOCKET_UNLOCK(so, 0);
+#endif
+			if (cp_len > 0)
+				error = uiomove(mtod(m, char *), (int)cp_len, uio);
+#if defined(__APPLE__) && !defined(__Userspace__)
+			SCTP_SOCKET_LOCK(so, 0);
+#endif
+			/* re-read */
+			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
+				goto release;
+			}
+
+			if ((control->do_not_ref_stcb == 0) && stcb &&
+			    stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+				no_rcv_needed = 1;
+			}
+			if (error) {
+				/* error we are out of here */
+				goto release;
+			}
+			SCTP_INP_READ_LOCK(inp);
+			hold_rlock = 1;
+			if (cp_len == SCTP_BUF_LEN(m)) {
+				if ((SCTP_BUF_NEXT(m)== NULL) &&
+				    (control->end_added)) {
+					out_flags |= MSG_EOR;
+					if ((control->do_not_ref_stcb == 0) &&
+					    (control->stcb != NULL) &&
+					    ((control->spec_flags & M_NOTIFICATION) == 0))
+						control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
+				}
+				if (control->spec_flags & M_NOTIFICATION) {
+					out_flags |= MSG_NOTIFICATION;
+				}
+				/* we ate up the mbuf */
+				if (in_flags & MSG_PEEK) {
+					/* just looking */
+					m = SCTP_BUF_NEXT(m);
+					copied_so_far += cp_len;
+				} else {
+					/* dispose of the mbuf */
+					if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+						sctp_sblog(&so->so_rcv,
+						   control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
+					}
+					sctp_sbfree(control, stcb, &so->so_rcv, m);
+					if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+						sctp_sblog(&so->so_rcv,
+						   control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
+					}
+					copied_so_far += cp_len;
+					freed_so_far += (uint32_t)cp_len;
+					freed_so_far += MSIZE;
+					atomic_subtract_int(&control->length, (int)cp_len);
+					control->data = sctp_m_free(m);
+					m = control->data;
+					/* been through it all, must hold sb lock ok to null tail */
+					if (control->data == NULL) {
+#ifdef INVARIANTS
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+						if ((control->end_added == 0) ||
+						    (TAILQ_NEXT(control, next) == NULL)) {
+							/* If the end is not added, OR the
+							 * next is NOT null we MUST have the lock.
+							 */
+							if (mtx_owned(&inp->inp_rdata_mtx) == 0) {
+								panic("Hmm we don't own the lock?");
+							}
+						}
+#endif
+#endif
+						control->tail_mbuf = NULL;
+#ifdef INVARIANTS
+						if ((control->end_added) && ((out_flags & MSG_EOR) == 0)) {
+							panic("end_added, nothing left and no MSG_EOR");
+						}
+#endif
+					}
+				}
+			} else {
+				/* Do we need to trim the mbuf? */
+				if (control->spec_flags & M_NOTIFICATION) {
+					out_flags |= MSG_NOTIFICATION;
+				}
+				if ((in_flags & MSG_PEEK) == 0) {
+					SCTP_BUF_RESV_UF(m, cp_len);
+					SCTP_BUF_LEN(m) -= (int)cp_len;
+					if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+						sctp_sblog(&so->so_rcv, control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, (int)cp_len);
+					}
+					SCTP_SB_DECR(&so->so_rcv, cp_len);
+					if ((control->do_not_ref_stcb == 0) &&
+					    stcb) {
+						atomic_subtract_int(&stcb->asoc.sb_cc, (int)cp_len);
+					}
+					copied_so_far += cp_len;
+					freed_so_far += (uint32_t)cp_len;
+					freed_so_far += MSIZE;
+					if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+						sctp_sblog(&so->so_rcv, control->do_not_ref_stcb?NULL:stcb,
+							   SCTP_LOG_SBRESULT, 0);
+					}
+					atomic_subtract_int(&control->length, (int)cp_len);
+				} else {
+					copied_so_far += cp_len;
+				}
+			}
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+			if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) {
+#else
+			if ((out_flags & MSG_EOR) || (uio_resid(uio) == 0)) {
+#endif
+#else
+			if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) {
+#endif
+				break;
+			}
+			if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
+			    (control->do_not_ref_stcb == 0) &&
+			    (freed_so_far >= rwnd_req)) {
+				sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
+			}
+		} /* end while(m) */
+		/*
+		 * At this point we have looked at it all and we either have
+		 * a MSG_EOR/or read all the user wants... <OR>
+		 * control->length == 0.
+		 */
+		if ((out_flags & MSG_EOR) && ((in_flags & MSG_PEEK) == 0)) {
+			/* we are done with this control */
+			if (control->length == 0) {
+				if (control->data) {
+#ifdef INVARIANTS
+					panic("control->data not null at read eor?");
+#else
+					SCTP_PRINTF("Strange, data left in the control buffer .. invariants would panic?\n");
+					sctp_m_freem(control->data);
+					control->data = NULL;
+#endif
+				}
+			done_with_control:
+				if (hold_rlock == 0) {
+					SCTP_INP_READ_LOCK(inp);
+					hold_rlock = 1;
+				}
+				TAILQ_REMOVE(&inp->read_queue, control, next);
+				/* Add back any hidden data */
+				if (control->held_length) {
+					held_length = 0;
+					control->held_length = 0;
+					wakeup_read_socket = 1;
+				}
+				if (control->aux_data) {
+					sctp_m_free (control->aux_data);
+					control->aux_data = NULL;
+				}
+				no_rcv_needed = control->do_not_ref_stcb;
+				sctp_free_remote_addr(control->whoFrom);
+				control->data = NULL;
+#ifdef INVARIANTS
+				if (control->on_strm_q) {
+					panic("About to free ctl:%p so:%p and its in %d",
+					      control, so, control->on_strm_q);
+				}
+#endif
+				sctp_free_a_readq(stcb, control);
+				control = NULL;
+				if ((freed_so_far >= rwnd_req) &&
+				    (no_rcv_needed == 0))
+					sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
+
+			} else {
+				/*
+				 * The user did not read all of this
+				 * message, turn off the returned MSG_EOR
+				 * since we are leaving more behind on the
+				 * control to read.
+				 */
+#ifdef INVARIANTS
+				if (control->end_added &&
+				    (control->data == NULL) &&
+				    (control->tail_mbuf == NULL)) {
+					panic("Gak, control->length is corrupt?");
+				}
+#endif
+				no_rcv_needed = control->do_not_ref_stcb;
+				out_flags &= ~MSG_EOR;
+			}
+		}
+		if (out_flags & MSG_EOR) {
+			goto release;
+		}
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+		if ((uio->uio_resid == 0) ||
+#else
+		if ((uio_resid(uio) == 0) ||
+#endif
+#else
+		if ((uio->uio_resid == 0) ||
+#endif
+		    ((in_eeor_mode) &&
+		     (copied_so_far >= max(so->so_rcv.sb_lowat, 1)))) {
+			goto release;
+		}
+		/*
+		 * If I hit here the receiver wants more and this message is
+		 * NOT done (pd-api). So two questions. Can we block? if not
+		 * we are done. Did the user NOT set MSG_WAITALL?
+		 */
+		if (block_allowed == 0) {
+			goto release;
+		}
+		/*
+		 * We need to wait for more data a few things:
+		 * - We don't release the I/O lock so we don't get someone else
+		 *   reading.
+		 * - We must be sure to account for the case where what is added
+		 *   is NOT to our control when we wakeup.
+		 */
+
+		/* Do we need to tell the transport a rwnd update might be
+		 * needed before we go to sleep?
+		 */
+		if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
+		    ((freed_so_far >= rwnd_req) &&
+		     (control->do_not_ref_stcb == 0) &&
+		     (no_rcv_needed == 0))) {
+			sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
+		}
+	wait_some_more:
+#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
+		if (so->so_rcv.sb_state & SBS_CANTRCVMORE) {
+			goto release;
+		}
+#else
+		if (so->so_state & SS_CANTRCVMORE) {
+			goto release;
+		}
+#endif
+
+		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)
+			goto release;
+
+		if (hold_rlock == 1) {
+			SCTP_INP_READ_UNLOCK(inp);
+			hold_rlock = 0;
+		}
+		if (hold_sblock == 0) {
+			SOCKBUF_LOCK(&so->so_rcv);
+			hold_sblock = 1;
+		}
+		if ((copied_so_far) && (control->length == 0) &&
+		    (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE))) {
+			goto release;
+		}
+#if defined(__APPLE__) && !defined(__Userspace__)
+		sbunlock(&so->so_rcv, 1);
+#endif
+		if (SCTP_SBAVAIL(&so->so_rcv) <= control->held_length) {
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+			error = sbwait(so, SO_RCV);
+#else
+			error = sbwait(&so->so_rcv);
+#endif
+			if (error) {
+#if defined(__APPLE__) && !defined(__Userspace__)
+				goto release_unlocked;
+#else
+				goto release;
+#endif
+			}
+			control->held_length = 0;
+		}
+#if defined(__APPLE__) && !defined(__Userspace__)
+		error = sblock(&so->so_rcv, SBLOCKWAIT(in_flags));
+#endif
+		if (hold_sblock) {
+			SOCKBUF_UNLOCK(&so->so_rcv);
+			hold_sblock = 0;
+		}
+		if (control->length == 0) {
+			/* still nothing here */
+			if (control->end_added == 1) {
+				/* he aborted, or is done i.e.did a shutdown */
+				out_flags |= MSG_EOR;
+				if (control->pdapi_aborted) {
+					if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
+						control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
+
+					out_flags |= MSG_TRUNC;
+				} else {
+					if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
+						control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
+				}
+				goto done_with_control;
+			}
+			if (SCTP_SBAVAIL(&so->so_rcv) > held_length) {
+				control->held_length = SCTP_SBAVAIL(&so->so_rcv);
+				held_length = 0;
+			}
+			goto wait_some_more;
+		} else if (control->data == NULL) {
+			/* we must re-sync since data
+			 * is probably being added
+			 */
+			SCTP_INP_READ_LOCK(inp);
+			if ((control->length > 0) && (control->data == NULL)) {
+				/* big trouble.. we have the lock and its corrupt? */
+#ifdef INVARIANTS
+				panic ("Impossible data==NULL length !=0");
+#endif
+				out_flags |= MSG_EOR;
+				out_flags |= MSG_TRUNC;
+				control->length = 0;
+				SCTP_INP_READ_UNLOCK(inp);
+				goto done_with_control;
+			}
+			SCTP_INP_READ_UNLOCK(inp);
+			/* We will fall around to get more data */
+		}
+		goto get_more_data;
+	} else {
+		/*-
+		 * Give caller back the mbuf chain,
+		 * store in uio_resid the length
+		 */
+		wakeup_read_socket = 0;
+		if ((control->end_added == 0) ||
+		    (TAILQ_NEXT(control, next) == NULL)) {
+			/* Need to get rlock */
+			if (hold_rlock == 0) {
+				SCTP_INP_READ_LOCK(inp);
+				hold_rlock = 1;
+			}
+		}
+		if (control->end_added) {
+			out_flags |= MSG_EOR;
+			if ((control->do_not_ref_stcb == 0) &&
+			    (control->stcb != NULL) &&
+			    ((control->spec_flags & M_NOTIFICATION) == 0))
+				control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
+		}
+		if (control->spec_flags & M_NOTIFICATION) {
+			out_flags |= MSG_NOTIFICATION;
+		}
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+		uio->uio_resid = control->length;
+#else
+		uio_setresid(uio, control->length);
+#endif
+#else
+		uio->uio_resid = control->length;
+#endif
+		*mp = control->data;
+		m = control->data;
+		while (m) {
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+				sctp_sblog(&so->so_rcv,
+				   control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
+			}
+			sctp_sbfree(control, stcb, &so->so_rcv, m);
+			freed_so_far += (uint32_t)SCTP_BUF_LEN(m);
+			freed_so_far += MSIZE;
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
+				sctp_sblog(&so->so_rcv,
+				   control->do_not_ref_stcb?NULL:stcb, SCTP_LOG_SBRESULT, 0);
+			}
+			m = SCTP_BUF_NEXT(m);
+		}
+		control->data = control->tail_mbuf = NULL;
+		control->length = 0;
+		if (out_flags & MSG_EOR) {
+			/* Done with this control */
+			goto done_with_control;
+		}
+	}
+ release:
+	if (hold_rlock == 1) {
+		SCTP_INP_READ_UNLOCK(inp);
+		hold_rlock = 0;
+	}
+#if defined(__Userspace__)
+	if (hold_sblock == 0) {
+		SOCKBUF_LOCK(&so->so_rcv);
+		hold_sblock = 1;
+	}
+#else
+	if (hold_sblock == 1) {
+		SOCKBUF_UNLOCK(&so->so_rcv);
+		hold_sblock = 0;
+	}
+#endif
+#if defined(__APPLE__) && !defined(__Userspace__)
+	sbunlock(&so->so_rcv, 1);
+#endif
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	SOCK_IO_RECV_UNLOCK(so);
+	sockbuf_lock = 0;
+#endif
+
+ release_unlocked:
+	if (hold_sblock) {
+		SOCKBUF_UNLOCK(&so->so_rcv);
+		hold_sblock = 0;
+	}
+	if ((stcb) && (in_flags & MSG_PEEK) == 0) {
+		if ((freed_so_far >= rwnd_req) &&
+		    (control && (control->do_not_ref_stcb == 0)) &&
+		    (no_rcv_needed == 0))
+			sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
+	}
+ out:
+	if (msg_flags) {
+		*msg_flags = out_flags;
+	}
+	if (((out_flags & MSG_EOR) == 0) &&
+	    ((in_flags & MSG_PEEK) == 0) &&
+	    (sinfo) &&
+	    (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
+	     sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO))) {
+		struct sctp_extrcvinfo *s_extra;
+		s_extra = (struct sctp_extrcvinfo *)sinfo;
+		s_extra->serinfo_next_flags = SCTP_NO_NEXT_MSG;
+	}
+	if (hold_rlock == 1) {
+		SCTP_INP_READ_UNLOCK(inp);
+	}
+	if (hold_sblock) {
+		SOCKBUF_UNLOCK(&so->so_rcv);
+	}
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	if (sockbuf_lock) {
+		SOCK_IO_RECV_UNLOCK(so);
+	}
+#endif
+
+	if (freecnt_applied) {
+		/*
+		 * The lock on the socket buffer protects us so the free
+		 * code will stop. But since we used the socketbuf lock and
+		 * the sender uses the tcb_lock to increment, we need to use
+		 * the atomic add to the refcnt.
+		 */
+		if (stcb == NULL) {
+#ifdef INVARIANTS
+			panic("stcb for refcnt has gone NULL?");
+			goto stage_left;
+#else
+			goto stage_left;
+#endif
+		}
+		/* Save the value back for next time */
+		stcb->freed_by_sorcv_sincelast = freed_so_far;
+		atomic_subtract_int(&stcb->asoc.refcnt, 1);
+	}
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) &SCTP_RECV_RWND_LOGGING_ENABLE) {
+		if (stcb) {
+			sctp_misc_ints(SCTP_SORECV_DONE,
+			               freed_so_far,
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+			               ((uio) ? (slen - uio->uio_resid) : slen),
+#else
+			               ((uio) ? (slen - uio_resid(uio)) : slen),
+#endif
+#else
+			               (uint32_t)((uio) ? (slen - uio->uio_resid) : slen),
+#endif
+			               stcb->asoc.my_rwnd,
+			               SCTP_SBAVAIL(&so->so_rcv));
+		} else {
+			sctp_misc_ints(SCTP_SORECV_DONE,
+			               freed_so_far,
+#if defined(__APPLE__) && !defined(__Userspace__)
+#if defined(APPLE_LEOPARD)
+			               ((uio) ? (slen - uio->uio_resid) : slen),
+#else
+			               ((uio) ? (slen - uio_resid(uio)) : slen),
+#endif
+#else
+			               (uint32_t)((uio) ? (slen - uio->uio_resid) : slen),
+#endif
+			               0,
+			               SCTP_SBAVAIL(&so->so_rcv));
+		}
+	}
+ stage_left:
+	if (wakeup_read_socket) {
+		sctp_sorwakeup(inp, so);
+	}
+	return (error);
+}
+
+#ifdef SCTP_MBUF_LOGGING
+struct mbuf *
+sctp_m_free(struct mbuf *m)
+{
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+		sctp_log_mb(m, SCTP_MBUF_IFREE);
+	}
+	return (m_free(m));
+}
+
+void
+sctp_m_freem(struct mbuf *mb)
+{
+	while (mb != NULL)
+		mb = sctp_m_free(mb);
+}
+
+#endif
+
+int
+sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id)
+{
+	/* Given a local address. For all associations
+	 * that holds the address, request a peer-set-primary.
+	 */
+	struct sctp_ifa *ifa;
+	struct sctp_laddr *wi;
+
+	ifa = sctp_find_ifa_by_addr(sa, vrf_id, SCTP_ADDR_NOT_LOCKED);
+	if (ifa == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EADDRNOTAVAIL);
+		return (EADDRNOTAVAIL);
+	}
+	/* Now that we have the ifa we must awaken the
+	 * iterator with this message.
+	 */
+	wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
+	if (wi == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
+		return (ENOMEM);
+	}
+	/* Now incr the count and int wi structure */
+	SCTP_INCR_LADDR_COUNT();
+	memset(wi, 0, sizeof(*wi));
+	(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
+	wi->ifa = ifa;
+	wi->action = SCTP_SET_PRIM_ADDR;
+	atomic_add_int(&ifa->refcount, 1);
+
+	/* Now add it to the work queue */
+	SCTP_WQ_ADDR_LOCK();
+	/*
+	 * Should this really be a tailq? As it is we will process the
+	 * newest first :-0
+	 */
+	LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
+	sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
+			 (struct sctp_inpcb *)NULL,
+			 (struct sctp_tcb *)NULL,
+			 (struct sctp_nets *)NULL);
+	SCTP_WQ_ADDR_UNLOCK();
+	return (0);
+}
+
+#if defined(__Userspace__)
+/* no sctp_soreceive for __Userspace__ now */
+#endif
+#if !defined(__Userspace__)
+int
+sctp_soreceive(	struct socket *so,
+		struct sockaddr **psa,
+		struct uio *uio,
+		struct mbuf **mp0,
+		struct mbuf **controlp,
+		int *flagsp)
+{
+	int error, fromlen;
+	uint8_t sockbuf[256];
+	struct sockaddr *from;
+	struct sctp_extrcvinfo sinfo;
+	int filling_sinfo = 1;
+	int flags;
+	struct sctp_inpcb *inp;
+
+	inp = (struct sctp_inpcb *)so->so_pcb;
+	/* pickup the assoc we are reading from */
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		return (EINVAL);
+	}
+	if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT) &&
+	     sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVRCVINFO) &&
+	     sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) ||
+	    (controlp == NULL)) {
+		/* user does not want the sndrcv ctl */
+		filling_sinfo = 0;
+	}
+	if (psa) {
+		from = (struct sockaddr *)sockbuf;
+		fromlen = sizeof(sockbuf);
+#ifdef HAVE_SA_LEN
+		from->sa_len = 0;
+#endif
+	} else {
+		from = NULL;
+		fromlen = 0;
+	}
+
+#if defined(__APPLE__) && !defined(__Userspace__)
+	SCTP_SOCKET_LOCK(so, 1);
+#endif
+	if (filling_sinfo) {
+		memset(&sinfo, 0, sizeof(struct sctp_extrcvinfo));
+	}
+	if (flagsp != NULL) {
+		flags = *flagsp;
+	} else {
+		flags = 0;
+	}
+	error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, &flags,
+	    (struct sctp_sndrcvinfo *)&sinfo, filling_sinfo);
+	if (flagsp != NULL) {
+		*flagsp = flags;
+	}
+	if (controlp != NULL) {
+		/* copy back the sinfo in a CMSG format */
+		if (filling_sinfo && ((flags & MSG_NOTIFICATION) == 0)) {
+			*controlp = sctp_build_ctl_nchunk(inp,
+			                                  (struct sctp_sndrcvinfo *)&sinfo);
+		} else {
+			*controlp = NULL;
+		}
+	}
+	if (psa) {
+		/* copy back the address info */
+#ifdef HAVE_SA_LEN
+		if (from && from->sa_len) {
+#else
+		if (from) {
+#endif
+#if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
+			*psa = sodupsockaddr(from, M_NOWAIT);
+#else
+			*psa = dup_sockaddr(from, mp0 == 0);
+#endif
+		} else {
+			*psa = NULL;
+		}
+	}
+#if defined(__APPLE__) && !defined(__Userspace__)
+	SCTP_SOCKET_UNLOCK(so, 1);
+#endif
+	return (error);
+}
+
+#if defined(_WIN32) && !defined(__Userspace__)
+/*
+ * General routine to allocate a hash table with control of memory flags.
+ * is in 7.0 and beyond for sure :-)
+ */
+void *
+sctp_hashinit_flags(int elements, struct malloc_type *type,
+                    u_long *hashmask, int flags)
+{
+	long hashsize;
+	LIST_HEAD(generic, generic) *hashtbl;
+	int i;
+
+
+	if (elements <= 0) {
+#ifdef INVARIANTS
+		panic("hashinit: bad elements");
+#else
+		SCTP_PRINTF("hashinit: bad elements?");
+		elements = 1;
+#endif
+	}
+	for (hashsize = 1; hashsize <= elements; hashsize <<= 1)
+		continue;
+	hashsize >>= 1;
+	if (flags & HASH_WAITOK)
+		hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, M_WAITOK);
+	else if (flags & HASH_NOWAIT)
+		hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, M_NOWAIT);
+	else {
+#ifdef INVARIANTS
+		panic("flag incorrect in hashinit_flags");
+#else
+		return (NULL);
+#endif
+	}
+
+	/* no memory? */
+	if (hashtbl == NULL)
+		return (NULL);
+
+	for (i = 0; i < hashsize; i++)
+		LIST_INIT(&hashtbl[i]);
+	*hashmask = hashsize - 1;
+	return (hashtbl);
+}
+#endif
+#else /*  __Userspace__ ifdef above sctp_soreceive */
+/*
+ * __Userspace__ Defining sctp_hashinit_flags() and sctp_hashdestroy() for userland.
+ * NOTE: We don't want multiple definitions here. So sctp_hashinit_flags() above for
+ *__FreeBSD__ must be excluded.
+ *
+ */
+
+void *
+sctp_hashinit_flags(int elements, struct malloc_type *type,
+                    u_long *hashmask, int flags)
+{
+	long hashsize;
+	LIST_HEAD(generic, generic) *hashtbl;
+	int i;
+
+	if (elements <= 0) {
+		SCTP_PRINTF("hashinit: bad elements?");
+#ifdef INVARIANTS
+		return (NULL);
+#else
+		elements = 1;
+#endif
+	}
+	for (hashsize = 1; hashsize <= elements; hashsize <<= 1)
+		continue;
+	hashsize >>= 1;
+	/*cannot use MALLOC here because it has to be declared or defined
+	  using MALLOC_DECLARE or MALLOC_DEFINE first. */
+	if (flags & HASH_WAITOK)
+		hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl));
+	else if (flags & HASH_NOWAIT)
+		hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl));
+	else {
+#ifdef INVARIANTS
+		SCTP_PRINTF("flag incorrect in hashinit_flags.\n");
+#endif
+		return (NULL);
+	}
+
+	/* no memory? */
+	if (hashtbl == NULL)
+		return (NULL);
+
+	for (i = 0; i < hashsize; i++)
+		LIST_INIT(&hashtbl[i]);
+	*hashmask = hashsize - 1;
+	return (hashtbl);
+}
+
+void
+sctp_hashdestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask)
+{
+	LIST_HEAD(generic, generic) *hashtbl, *hp;
+
+	hashtbl = vhashtbl;
+	for (hp = hashtbl; hp <= &hashtbl[hashmask]; hp++)
+		if (!LIST_EMPTY(hp)) {
+			SCTP_PRINTF("hashdestroy: hash not empty.\n");
+			return;
+		}
+	FREE(hashtbl, type);
+}
+
+void
+sctp_hashfreedestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask)
+{
+	LIST_HEAD(generic, generic) *hashtbl/*, *hp*/;
+	/*
+	LIST_ENTRY(type) *start, *temp;
+	 */
+	hashtbl = vhashtbl;
+	/* Apparently temp is not dynamically allocated, so attempts to
+	   free it results in error.
+	for (hp = hashtbl; hp <= &hashtbl[hashmask]; hp++)
+		if (!LIST_EMPTY(hp)) {
+			start = LIST_FIRST(hp);
+			while (start != NULL) {
+				temp = start;
+				start = start->le_next;
+				SCTP_PRINTF("%s: %p \n", __func__, (void *)temp);
+				FREE(temp, type);
+			}
+		}
+	 */
+	FREE(hashtbl, type);
+}
+
+#endif
+int
+sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
+			 int totaddr, int *error)
+{
+	int added = 0;
+	int i;
+	struct sctp_inpcb *inp;
+	struct sockaddr *sa;
+	size_t incr = 0;
+#ifdef INET
+	struct sockaddr_in *sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 *sin6;
+#endif
+
+	sa = addr;
+	inp = stcb->sctp_ep;
+	*error = 0;
+	for (i = 0; i < totaddr; i++) {
+		switch (sa->sa_family) {
+#ifdef INET
+		case AF_INET:
+			incr = sizeof(struct sockaddr_in);
+			sin = (struct sockaddr_in *)sa;
+			if ((sin->sin_addr.s_addr == INADDR_ANY) ||
+			    (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
+			    IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+				(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+				                      SCTP_FROM_SCTPUTIL + SCTP_LOC_7);
+				*error = EINVAL;
+				goto out_now;
+			}
+			if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port,
+			                         SCTP_DONOT_SETSCOPE,
+			                         SCTP_ADDR_IS_CONFIRMED)) {
+				/* assoc gone no un-lock */
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
+				(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+				                      SCTP_FROM_SCTPUTIL + SCTP_LOC_8);
+				*error = ENOBUFS;
+				goto out_now;
+			}
+			added++;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+			incr = sizeof(struct sockaddr_in6);
+			sin6 = (struct sockaddr_in6 *)sa;
+			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
+			    IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+				(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+				                      SCTP_FROM_SCTPUTIL + SCTP_LOC_9);
+				*error = EINVAL;
+				goto out_now;
+			}
+			if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port,
+			                         SCTP_DONOT_SETSCOPE,
+			                         SCTP_ADDR_IS_CONFIRMED)) {
+				/* assoc gone no un-lock */
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
+				(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+				                      SCTP_FROM_SCTPUTIL + SCTP_LOC_10);
+				*error = ENOBUFS;
+				goto out_now;
+			}
+			added++;
+			break;
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+			incr = sizeof(struct sockaddr_conn);
+			if (sctp_add_remote_addr(stcb, sa, NULL, stcb->asoc.port,
+			                         SCTP_DONOT_SETSCOPE,
+			                         SCTP_ADDR_IS_CONFIRMED)) {
+				/* assoc gone no un-lock */
+				SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
+				(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
+				                      SCTP_FROM_SCTPUTIL + SCTP_LOC_11);
+				*error = ENOBUFS;
+				goto out_now;
+			}
+			added++;
+			break;
+#endif
+		default:
+			break;
+		}
+		sa = (struct sockaddr *)((caddr_t)sa + incr);
+	}
+ out_now:
+	return (added);
+}
+
+int
+sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
+			  unsigned int totaddr,
+			  unsigned int *num_v4, unsigned int *num_v6,
+			  unsigned int limit)
+{
+	struct sockaddr *sa;
+	struct sctp_tcb *stcb;
+	unsigned int incr, at, i;
+
+	at = 0;
+	sa = addr;
+	*num_v6 = *num_v4 = 0;
+	/* account and validate addresses */
+	if (totaddr == 0) {
+		return (EINVAL);
+	}
+	for (i = 0; i < totaddr; i++) {
+		if (at + sizeof(struct sockaddr) > limit) {
+			return (EINVAL);
+		}
+		switch (sa->sa_family) {
+#ifdef INET
+		case AF_INET:
+			incr = (unsigned int)sizeof(struct sockaddr_in);
+#ifdef HAVE_SA_LEN
+			if (sa->sa_len != incr) {
+				return (EINVAL);
+			}
+#endif
+			(*num_v4) += 1;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+		{
+			struct sockaddr_in6 *sin6;
+
+			incr = (unsigned int)sizeof(struct sockaddr_in6);
+#ifdef HAVE_SA_LEN
+			if (sa->sa_len != incr) {
+				return (EINVAL);
+			}
+#endif
+			sin6 = (struct sockaddr_in6 *)sa;
+			if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+				/* Must be non-mapped for connectx */
+				return (EINVAL);
+			}
+			(*num_v6) += 1;
+			break;
+		}
+#endif
+		default:
+			return (EINVAL);
+		}
+		if ((at + incr) > limit) {
+			return (EINVAL);
+		}
+		SCTP_INP_INCR_REF(inp);
+		stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL);
+		if (stcb != NULL) {
+			SCTP_TCB_UNLOCK(stcb);
+			return (EALREADY);
+		} else {
+			SCTP_INP_DECR_REF(inp);
+		}
+		at += incr;
+		sa = (struct sockaddr *)((caddr_t)sa + incr);
+	}
+	return (0);
+}
+
+/*
+ * sctp_bindx(ADD) for one address.
+ * assumes all arguments are valid/checked by caller.
+ */
+void
+sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
+                       struct sockaddr *sa, uint32_t vrf_id, int *error,
+                       void *p)
+{
+#if defined(INET) && defined(INET6)
+	struct sockaddr_in sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 *sin6;
+#endif
+#ifdef INET
+	struct sockaddr_in *sinp;
+#endif
+	struct sockaddr *addr_to_use;
+	struct sctp_inpcb *lep;
+#ifdef SCTP_MVRF
+	int i;
+#endif
+	uint16_t port;
+
+	/* see if we're bound all already! */
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+#ifdef SCTP_MVRF
+	/* Is the VRF one we have */
+	for (i = 0; i < inp->num_vrfs; i++) {
+		if (vrf_id == inp->m_vrf_ids[i]) {
+			break;
+		}
+	}
+	if (i == inp->num_vrfs) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+#endif
+	switch (sa->sa_family) {
+#ifdef INET6
+	case AF_INET6:
+#ifdef HAVE_SA_LEN
+		if (sa->sa_len != sizeof(struct sockaddr_in6)) {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+#endif
+		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
+			/* can only bind v6 on PF_INET6 sockets */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+		sin6 = (struct sockaddr_in6 *)sa;
+		port = sin6->sin6_port;
+#ifdef INET
+		if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
+			    SCTP_IPV6_V6ONLY(inp)) {
+				/* can't bind v4-mapped on PF_INET sockets */
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+				*error = EINVAL;
+				return;
+			}
+			in6_sin6_2_sin(&sin, sin6);
+			addr_to_use = (struct sockaddr *)&sin;
+		} else {
+			addr_to_use = sa;
+		}
+#else
+		addr_to_use = sa;
+#endif
+		break;
+#endif
+#ifdef INET
+	case AF_INET:
+#ifdef HAVE_SA_LEN
+		if (sa->sa_len != sizeof(struct sockaddr_in)) {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+#endif
+		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
+		    SCTP_IPV6_V6ONLY(inp)) {
+			/* can't bind v4 on PF_INET sockets */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+		sinp = (struct sockaddr_in *)sa;
+		port = sinp->sin_port;
+		addr_to_use = sa;
+		break;
+#endif
+	default:
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
+#if !(defined(_WIN32) || defined(__Userspace__))
+		if (p == NULL) {
+			/* Can't get proc for Net/Open BSD */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+#endif
+		*error = sctp_inpcb_bind(so, addr_to_use, NULL, p);
+		return;
+	}
+	/* Validate the incoming port. */
+	if ((port != 0) && (port != inp->sctp_lport)) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+	lep = sctp_pcb_findep(addr_to_use, 1, 0, vrf_id);
+	if (lep == NULL) {
+		/* add the address */
+		*error = sctp_addr_mgmt_ep_sa(inp, addr_to_use,
+		                              SCTP_ADD_IP_ADDRESS, vrf_id);
+	} else {
+		if (lep != inp) {
+			*error = EADDRINUSE;
+		}
+		SCTP_INP_DECR_REF(lep);
+	}
+}
+
+/*
+ * sctp_bindx(DELETE) for one address.
+ * assumes all arguments are valid/checked by caller.
+ */
+void
+sctp_bindx_delete_address(struct sctp_inpcb *inp,
+                          struct sockaddr *sa, uint32_t vrf_id, int *error)
+{
+	struct sockaddr *addr_to_use;
+#if defined(INET) && defined(INET6)
+	struct sockaddr_in6 *sin6;
+	struct sockaddr_in sin;
+#endif
+#ifdef SCTP_MVRF
+	int i;
+#endif
+
+	/* see if we're bound all already! */
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+#ifdef SCTP_MVRF
+	/* Is the VRF one we have */
+	for (i = 0; i < inp->num_vrfs; i++) {
+		if (vrf_id == inp->m_vrf_ids[i]) {
+			break;
+		}
+	}
+	if (i == inp->num_vrfs) {
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+#endif
+	switch (sa->sa_family) {
+#ifdef INET6
+	case AF_INET6:
+#ifdef HAVE_SA_LEN
+		if (sa->sa_len != sizeof(struct sockaddr_in6)) {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+#endif
+		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
+			/* can only bind v6 on PF_INET6 sockets */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+#ifdef INET
+		sin6 = (struct sockaddr_in6 *)sa;
+		if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
+			    SCTP_IPV6_V6ONLY(inp)) {
+				/* can't bind mapped-v4 on PF_INET sockets */
+				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+				*error = EINVAL;
+				return;
+			}
+			in6_sin6_2_sin(&sin, sin6);
+			addr_to_use = (struct sockaddr *)&sin;
+		} else {
+			addr_to_use = sa;
+		}
+#else
+		addr_to_use = sa;
+#endif
+		break;
+#endif
+#ifdef INET
+	case AF_INET:
+#ifdef HAVE_SA_LEN
+		if (sa->sa_len != sizeof(struct sockaddr_in)) {
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+#endif
+		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
+		    SCTP_IPV6_V6ONLY(inp)) {
+			/* can't bind v4 on PF_INET sockets */
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+			*error = EINVAL;
+			return;
+		}
+		addr_to_use = sa;
+		break;
+#endif
+	default:
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
+		*error = EINVAL;
+		return;
+	}
+	/* No lock required mgmt_ep_sa does its own locking. */
+	*error = sctp_addr_mgmt_ep_sa(inp, addr_to_use, SCTP_DEL_IP_ADDRESS,
+	                              vrf_id);
+}
+
+/*
+ * returns the valid local address count for an assoc, taking into account
+ * all scoping rules
+ */
+int
+sctp_local_addr_count(struct sctp_tcb *stcb)
+{
+	int loopback_scope;
+#if defined(INET)
+	int ipv4_local_scope, ipv4_addr_legal;
+#endif
+#if defined(INET6)
+	int local_scope, site_scope, ipv6_addr_legal;
+#endif
+#if defined(__Userspace__)
+	int conn_addr_legal;
+#endif
+	struct sctp_vrf *vrf;
+	struct sctp_ifn *sctp_ifn;
+	struct sctp_ifa *sctp_ifa;
+	int count = 0;
+
+	/* Turn on all the appropriate scopes */
+	loopback_scope = stcb->asoc.scope.loopback_scope;
+#if defined(INET)
+	ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
+	ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
+#endif
+#if defined(INET6)
+	local_scope = stcb->asoc.scope.local_scope;
+	site_scope = stcb->asoc.scope.site_scope;
+	ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
+#endif
+#if defined(__Userspace__)
+	conn_addr_legal = stcb->asoc.scope.conn_addr_legal;
+#endif
+	SCTP_IPI_ADDR_RLOCK();
+	vrf = sctp_find_vrf(stcb->asoc.vrf_id);
+	if (vrf == NULL) {
+		/* no vrf, no addresses */
+		SCTP_IPI_ADDR_RUNLOCK();
+		return (0);
+	}
+
+	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+		/*
+		 * bound all case: go through all ifns on the vrf
+		 */
+		LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
+			if ((loopback_scope == 0) &&
+			    SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
+				continue;
+			}
+			LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+				if (sctp_is_addr_restricted(stcb, sctp_ifa))
+					continue;
+				switch (sctp_ifa->address.sa.sa_family) {
+#ifdef INET
+				case AF_INET:
+					if (ipv4_addr_legal) {
+						struct sockaddr_in *sin;
+
+						sin = &sctp_ifa->address.sin;
+						if (sin->sin_addr.s_addr == 0) {
+							/* skip unspecified addrs */
+							continue;
+						}
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+						if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
+						                     &sin->sin_addr) != 0) {
+							continue;
+						}
+#endif
+						if ((ipv4_local_scope == 0) &&
+						    (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
+							continue;
+						}
+						/* count this one */
+						count++;
+					} else {
+						continue;
+					}
+					break;
+#endif
+#ifdef INET6
+				case AF_INET6:
+					if (ipv6_addr_legal) {
+						struct sockaddr_in6 *sin6;
+
+#if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME)
+						struct sockaddr_in6 lsa6;
+#endif
+						sin6 = &sctp_ifa->address.sin6;
+						if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+							continue;
+						}
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+						if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
+						                     &sin6->sin6_addr) != 0) {
+							continue;
+						}
+#endif
+						if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
+							if (local_scope == 0)
+								continue;
+#if defined(SCTP_EMBEDDED_V6_SCOPE)
+							if (sin6->sin6_scope_id == 0) {
+#ifdef SCTP_KAME
+								if (sa6_recoverscope(sin6) != 0)
+									/*
+									 * bad link
+									 * local
+									 * address
+									 */
+									continue;
+#else
+								lsa6 = *sin6;
+								if (in6_recoverscope(&lsa6,
+								                     &lsa6.sin6_addr,
+								                     NULL))
+									/*
+									 * bad link
+									 * local
+									 * address
+									 */
+									continue;
+								sin6 = &lsa6;
+#endif /* SCTP_KAME */
+							}
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+						}
+						if ((site_scope == 0) &&
+						    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
+							continue;
+						}
+						/* count this one */
+						count++;
+					}
+					break;
+#endif
+#if defined(__Userspace__)
+				case AF_CONN:
+					if (conn_addr_legal) {
+						count++;
+					}
+					break;
+#endif
+				default:
+					/* TSNH */
+					break;
+				}
+			}
+		}
+	} else {
+		/*
+		 * subset bound case
+		 */
+		struct sctp_laddr *laddr;
+		LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list,
+			     sctp_nxt_addr) {
+			if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
+				continue;
+			}
+			/* count this one */
+			count++;
+		}
+	}
+	SCTP_IPI_ADDR_RUNLOCK();
+	return (count);
+}
+
+#if defined(SCTP_LOCAL_TRACE_BUF)
+
+void
+sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f)
+{
+	uint32_t saveindex, newindex;
+
+#if defined(_WIN32) && !defined(__Userspace__)
+	if (SCTP_BASE_SYSCTL(sctp_log) == NULL) {
+		return;
+	}
+	do {
+		saveindex = SCTP_BASE_SYSCTL(sctp_log)->index;
+		if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
+			newindex = 1;
+		} else {
+			newindex = saveindex + 1;
+		}
+	} while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log)->index, saveindex, newindex) == 0);
+	if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
+		saveindex = 0;
+	}
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].subsys = subsys;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[0] = a;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[1] = b;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[2] = c;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[3] = d;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[4] = e;
+	SCTP_BASE_SYSCTL(sctp_log)->entry[saveindex].params[5] = f;
+#else
+	do {
+		saveindex = SCTP_BASE_SYSCTL(sctp_log).index;
+		if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
+			newindex = 1;
+		} else {
+			newindex = saveindex + 1;
+		}
+	} while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log).index, saveindex, newindex) == 0);
+	if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
+		saveindex = 0;
+	}
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].subsys = subsys;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[0] = a;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[1] = b;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[2] = c;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[3] = d;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[4] = e;
+	SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[5] = f;
+#endif
+}
+
+#endif
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+static bool
+sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *inp,
+    const struct sockaddr *sa SCTP_UNUSED, void *ctx SCTP_UNUSED)
+{
+	struct ip *iph;
+#ifdef INET6
+	struct ip6_hdr *ip6;
+#endif
+	struct mbuf *sp, *last;
+	struct udphdr *uhdr;
+	uint16_t port;
+
+	if ((m->m_flags & M_PKTHDR) == 0) {
+		/* Can't handle one that is not a pkt hdr */
+		goto out;
+	}
+	/* Pull the src port */
+	iph = mtod(m, struct ip *);
+	uhdr = (struct udphdr *)((caddr_t)iph + off);
+	port = uhdr->uh_sport;
+	/* Split out the mbuf chain. Leave the
+	 * IP header in m, place the
+	 * rest in the sp.
+	 */
+	sp = m_split(m, off, M_NOWAIT);
+	if (sp == NULL) {
+		/* Gak, drop packet, we can't do a split */
+		goto out;
+	}
+	if (sp->m_pkthdr.len < sizeof(struct udphdr) + sizeof(struct sctphdr)) {
+		/* Gak, packet can't have an SCTP header in it - too small */
+		m_freem(sp);
+		goto out;
+	}
+	/* Now pull up the UDP header and SCTP header together */
+	sp = m_pullup(sp, sizeof(struct udphdr) + sizeof(struct sctphdr));
+	if (sp == NULL) {
+		/* Gak pullup failed */
+		goto out;
+	}
+	/* Trim out the UDP header */
+	m_adj(sp, sizeof(struct udphdr));
+
+	/* Now reconstruct the mbuf chain */
+	for (last = m; last->m_next; last = last->m_next);
+	last->m_next = sp;
+	m->m_pkthdr.len += sp->m_pkthdr.len;
+	/*
+	 * The CSUM_DATA_VALID flags indicates that the HW checked the
+	 * UDP checksum and it was valid.
+	 * Since CSUM_DATA_VALID == CSUM_SCTP_VALID this would imply that
+	 * the HW also verified the SCTP checksum. Therefore, clear the bit.
+	 */
+	SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
+	        "sctp_recv_udp_tunneled_packet(): Packet of length %d received on %s with csum_flags 0x%b.\n",
+	        m->m_pkthdr.len,
+	        if_name(m->m_pkthdr.rcvif),
+	        (int)m->m_pkthdr.csum_flags, CSUM_BITS);
+	m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
+	iph = mtod(m, struct ip *);
+	switch (iph->ip_v) {
+#ifdef INET
+	case IPVERSION:
+		iph->ip_len = htons(ntohs(iph->ip_len) - sizeof(struct udphdr));
+		sctp_input_with_port(m, off, port);
+		break;
+#endif
+#ifdef INET6
+	case IPV6_VERSION >> 4:
+		ip6 = mtod(m, struct ip6_hdr *);
+		ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - sizeof(struct udphdr));
+		sctp6_input_with_port(&m, &off, port);
+		break;
+#endif
+	default:
+		goto out;
+		break;
+	}
+	return (true);
+ out:
+	m_freem(m);
+
+	return (true);
+}
+
+#ifdef INET
+static void
+sctp_recv_icmp_tunneled_packet(udp_tun_icmp_param_t param)
+{
+	struct icmp *icmp = param.icmp;
+	struct ip *outer_ip, *inner_ip;
+	struct sctphdr *sh;
+	struct udphdr *udp;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+	struct sctp_nets *net;
+	struct sctp_init_chunk *ch;
+	struct sockaddr_in src, dst;
+	uint8_t type, code;
+
+	inner_ip = &icmp->icmp_ip;
+	outer_ip = (struct ip *)((caddr_t)icmp - sizeof(struct ip));
+	if (ntohs(outer_ip->ip_len) <
+	    sizeof(struct ip) + 8 + (inner_ip->ip_hl << 2) + sizeof(struct udphdr) + 8) {
+		return;
+	}
+	udp = (struct udphdr *)((caddr_t)inner_ip + (inner_ip->ip_hl << 2));
+	sh = (struct sctphdr *)(udp + 1);
+	memset(&src, 0, sizeof(struct sockaddr_in));
+	src.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+	src.sin_len = sizeof(struct sockaddr_in);
+#endif
+	src.sin_port = sh->src_port;
+	src.sin_addr = inner_ip->ip_src;
+	memset(&dst, 0, sizeof(struct sockaddr_in));
+	dst.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+	dst.sin_len = sizeof(struct sockaddr_in);
+#endif
+	dst.sin_port = sh->dest_port;
+	dst.sin_addr = inner_ip->ip_dst;
+	/*
+	 * 'dst' holds the dest of the packet that failed to be sent.
+	 * 'src' holds our local endpoint address. Thus we reverse
+	 * the dst and the src in the lookup.
+	 */
+	inp = NULL;
+	net = NULL;
+	stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
+	                                    (struct sockaddr *)&src,
+	                                    &inp, &net, 1,
+	                                    SCTP_DEFAULT_VRFID);
+	if ((stcb != NULL) &&
+	    (net != NULL) &&
+	    (inp != NULL)) {
+		/* Check the UDP port numbers */
+		if ((udp->uh_dport != net->port) ||
+		    (udp->uh_sport != htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)))) {
+			SCTP_TCB_UNLOCK(stcb);
+			return;
+		}
+		/* Check the verification tag */
+		if (ntohl(sh->v_tag) != 0) {
+			/*
+			 * This must be the verification tag used
+			 * for sending out packets. We don't
+			 * consider packets reflecting the
+			 * verification tag.
+			 */
+			if (ntohl(sh->v_tag) != stcb->asoc.peer_vtag) {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+		} else {
+			if (ntohs(outer_ip->ip_len) >=
+			    sizeof(struct ip) +
+			    8 + (inner_ip->ip_hl << 2) + 8 + 20) {
+				/*
+				 * In this case we can check if we
+				 * got an INIT chunk and if the
+				 * initiate tag matches.
+				 */
+				ch = (struct sctp_init_chunk *)(sh + 1);
+				if ((ch->ch.chunk_type != SCTP_INITIATION) ||
+				    (ntohl(ch->init.initiate_tag) != stcb->asoc.my_vtag)) {
+					SCTP_TCB_UNLOCK(stcb);
+					return;
+				}
+			} else {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+		}
+		type = icmp->icmp_type;
+		code = icmp->icmp_code;
+		if ((type == ICMP_UNREACH) &&
+		    (code == ICMP_UNREACH_PORT)) {
+			code = ICMP_UNREACH_PROTOCOL;
+		}
+		sctp_notify(inp, stcb, net, type, code,
+		            ntohs(inner_ip->ip_len),
+		            (uint32_t)ntohs(icmp->icmp_nextmtu));
+#if defined(__Userspace__)
+		if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
+		    (stcb->sctp_socket != NULL)) {
+			struct socket *upcall_socket;
+
+			upcall_socket = stcb->sctp_socket;
+			SOCK_LOCK(upcall_socket);
+			soref(upcall_socket);
+			SOCK_UNLOCK(upcall_socket);
+			if ((upcall_socket->so_upcall != NULL) &&
+			    (upcall_socket->so_error != 0)) {
+				(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
+			}
+			ACCEPT_LOCK();
+			SOCK_LOCK(upcall_socket);
+			sorele(upcall_socket);
+		}
+#endif
+	} else {
+		if ((stcb == NULL) && (inp != NULL)) {
+			/* reduce ref-count */
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			SCTP_INP_WUNLOCK(inp);
+		}
+		if (stcb) {
+			SCTP_TCB_UNLOCK(stcb);
+		}
+	}
+	return;
+}
+#endif
+
+#ifdef INET6
+static void
+sctp_recv_icmp6_tunneled_packet(udp_tun_icmp_param_t param)
+{
+	struct ip6ctlparam *ip6cp = param.ip6cp;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb;
+	struct sctp_nets *net;
+	struct sctphdr sh;
+	struct udphdr udp;
+	struct sockaddr_in6 src, dst;
+	uint8_t type, code;
+
+	/*
+	 * XXX: We assume that when IPV6 is non NULL, M and OFF are
+	 * valid.
+	 */
+	if (ip6cp->ip6c_m == NULL) {
+		return;
+	}
+	/* Check if we can safely examine the ports and the
+	 * verification tag of the SCTP common header.
+	 */
+	if (ip6cp->ip6c_m->m_pkthdr.len <
+	    ip6cp->ip6c_off + sizeof(struct udphdr)+ offsetof(struct sctphdr, checksum)) {
+		return;
+	}
+	/* Copy out the UDP header. */
+	memset(&udp, 0, sizeof(struct udphdr));
+	m_copydata(ip6cp->ip6c_m,
+		   ip6cp->ip6c_off,
+		   sizeof(struct udphdr),
+		   (caddr_t)&udp);
+	/* Copy out the port numbers and the verification tag. */
+	memset(&sh, 0, sizeof(struct sctphdr));
+	m_copydata(ip6cp->ip6c_m,
+		   ip6cp->ip6c_off + sizeof(struct udphdr),
+		   sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
+		   (caddr_t)&sh);
+	memset(&src, 0, sizeof(struct sockaddr_in6));
+	src.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	src.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+	src.sin6_port = sh.src_port;
+	src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
+		return;
+	}
+#endif
+	memset(&dst, 0, sizeof(struct sockaddr_in6));
+	dst.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	dst.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+	dst.sin6_port = sh.dest_port;
+	dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+	if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
+		return;
+	}
+#endif
+	inp = NULL;
+	net = NULL;
+	stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
+	                                    (struct sockaddr *)&src,
+	                                    &inp, &net, 1, SCTP_DEFAULT_VRFID);
+	if ((stcb != NULL) &&
+	    (net != NULL) &&
+	    (inp != NULL)) {
+		/* Check the UDP port numbers */
+		if ((udp.uh_dport != net->port) ||
+		    (udp.uh_sport != htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)))) {
+			SCTP_TCB_UNLOCK(stcb);
+			return;
+		}
+		/* Check the verification tag */
+		if (ntohl(sh.v_tag) != 0) {
+			/*
+			 * This must be the verification tag used for
+			 * sending out packets. We don't consider
+			 * packets reflecting the verification tag.
+			 */
+			if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+		} else {
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+			if (ip6cp->ip6c_m->m_pkthdr.len >=
+			    ip6cp->ip6c_off + sizeof(struct udphdr) +
+			                      sizeof(struct sctphdr) +
+			                      sizeof(struct sctp_chunkhdr) +
+			                      offsetof(struct sctp_init, a_rwnd)) {
+				/*
+				 * In this case we can check if we
+				 * got an INIT chunk and if the
+				 * initiate tag matches.
+				 */
+				uint32_t initiate_tag;
+				uint8_t chunk_type;
+
+				m_copydata(ip6cp->ip6c_m,
+					   ip6cp->ip6c_off +
+					   sizeof(struct udphdr) +
+					   sizeof(struct sctphdr),
+					   sizeof(uint8_t),
+					   (caddr_t)&chunk_type);
+				m_copydata(ip6cp->ip6c_m,
+					   ip6cp->ip6c_off +
+					   sizeof(struct udphdr) +
+					   sizeof(struct sctphdr) +
+					   sizeof(struct sctp_chunkhdr),
+					   sizeof(uint32_t),
+					   (caddr_t)&initiate_tag);
+				if ((chunk_type != SCTP_INITIATION) ||
+				    (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
+					SCTP_TCB_UNLOCK(stcb);
+					return;
+				}
+			} else {
+				SCTP_TCB_UNLOCK(stcb);
+				return;
+			}
+#else
+			SCTP_TCB_UNLOCK(stcb);
+			return;
+#endif
+		}
+		type = ip6cp->ip6c_icmp6->icmp6_type;
+		code = ip6cp->ip6c_icmp6->icmp6_code;
+		if ((type == ICMP6_DST_UNREACH) &&
+		    (code == ICMP6_DST_UNREACH_NOPORT)) {
+			type = ICMP6_PARAM_PROB;
+			code = ICMP6_PARAMPROB_NEXTHEADER;
+		}
+		sctp6_notify(inp, stcb, net, type, code,
+			     ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
+#if defined(__Userspace__)
+		if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
+		    (stcb->sctp_socket != NULL)) {
+			struct socket *upcall_socket;
+
+			upcall_socket = stcb->sctp_socket;
+			SOCK_LOCK(upcall_socket);
+			soref(upcall_socket);
+			SOCK_UNLOCK(upcall_socket);
+			if ((upcall_socket->so_upcall != NULL) &&
+			    (upcall_socket->so_error != 0)) {
+				(*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT);
+			}
+			ACCEPT_LOCK();
+			SOCK_LOCK(upcall_socket);
+			sorele(upcall_socket);
+		}
+#endif
+	} else {
+		if ((stcb == NULL) && (inp != NULL)) {
+			/* reduce inp's ref-count */
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			SCTP_INP_WUNLOCK(inp);
+		}
+		if (stcb) {
+			SCTP_TCB_UNLOCK(stcb);
+		}
+	}
+}
+#endif
+
+void
+sctp_over_udp_stop(void)
+{
+	/*
+	 * This function assumes sysctl caller holds sctp_sysctl_info_lock() for writing!
+	 */
+#ifdef INET
+	if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) {
+		soclose(SCTP_BASE_INFO(udp4_tun_socket));
+		SCTP_BASE_INFO(udp4_tun_socket) = NULL;
+	}
+#endif
+#ifdef INET6
+	if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) {
+		soclose(SCTP_BASE_INFO(udp6_tun_socket));
+		SCTP_BASE_INFO(udp6_tun_socket) = NULL;
+	}
+#endif
+}
+
+int
+sctp_over_udp_start(void)
+{
+	uint16_t port;
+	int ret;
+#ifdef INET
+	struct sockaddr_in sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 sin6;
+#endif
+	/*
+	 * This function assumes sysctl caller holds sctp_sysctl_info_lock() for writing!
+	 */
+	port = SCTP_BASE_SYSCTL(sctp_udp_tunneling_port);
+	if (ntohs(port) == 0) {
+		/* Must have a port set */
+		return (EINVAL);
+	}
+#ifdef INET
+	if (SCTP_BASE_INFO(udp4_tun_socket) != NULL) {
+		/* Already running -- must stop first */
+		return (EALREADY);
+	}
+#endif
+#ifdef INET6
+	if (SCTP_BASE_INFO(udp6_tun_socket) != NULL) {
+		/* Already running -- must stop first */
+		return (EALREADY);
+	}
+#endif
+#ifdef INET
+	if ((ret = socreate(PF_INET, &SCTP_BASE_INFO(udp4_tun_socket),
+	                    SOCK_DGRAM, IPPROTO_UDP,
+	                    curthread->td_ucred, curthread))) {
+		sctp_over_udp_stop();
+		return (ret);
+	}
+	/* Call the special UDP hook. */
+	if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp4_tun_socket),
+	                                    sctp_recv_udp_tunneled_packet,
+	                                    sctp_recv_icmp_tunneled_packet,
+	                                    NULL))) {
+		sctp_over_udp_stop();
+		return (ret);
+	}
+	/* Ok, we have a socket, bind it to the port. */
+	memset(&sin, 0, sizeof(struct sockaddr_in));
+	sin.sin_len = sizeof(struct sockaddr_in);
+	sin.sin_family = AF_INET;
+	sin.sin_port = htons(port);
+	if ((ret = sobind(SCTP_BASE_INFO(udp4_tun_socket),
+	                  (struct sockaddr *)&sin, curthread))) {
+		sctp_over_udp_stop();
+		return (ret);
+	}
+#endif
+#ifdef INET6
+	if ((ret = socreate(PF_INET6, &SCTP_BASE_INFO(udp6_tun_socket),
+	                    SOCK_DGRAM, IPPROTO_UDP,
+	                    curthread->td_ucred, curthread))) {
+		sctp_over_udp_stop();
+		return (ret);
+	}
+	/* Call the special UDP hook. */
+	if ((ret = udp_set_kernel_tunneling(SCTP_BASE_INFO(udp6_tun_socket),
+	                                    sctp_recv_udp_tunneled_packet,
+	                                    sctp_recv_icmp6_tunneled_packet,
+	                                    NULL))) {
+		sctp_over_udp_stop();
+		return (ret);
+	}
+	/* Ok, we have a socket, bind it to the port. */
+	memset(&sin6, 0, sizeof(struct sockaddr_in6));
+	sin6.sin6_len = sizeof(struct sockaddr_in6);
+	sin6.sin6_family = AF_INET6;
+	sin6.sin6_port = htons(port);
+	if ((ret = sobind(SCTP_BASE_INFO(udp6_tun_socket),
+	                  (struct sockaddr *)&sin6, curthread))) {
+		sctp_over_udp_stop();
+		return (ret);
+	}
+#endif
+	return (0);
+}
+#endif
+
+/*
+ * sctp_min_mtu ()returns the minimum of all non-zero arguments.
+ * If all arguments are zero, zero is returned.
+ */
+uint32_t
+sctp_min_mtu(uint32_t mtu1, uint32_t mtu2, uint32_t mtu3)
+{
+	if (mtu1 > 0) {
+		if (mtu2 > 0) {
+			if (mtu3 > 0) {
+				return (min(mtu1, min(mtu2, mtu3)));
+			} else {
+				return (min(mtu1, mtu2));
+			}
+		} else {
+			if (mtu3 > 0) {
+				return (min(mtu1, mtu3));
+			} else {
+				return (mtu1);
+			}
+		}
+	} else {
+		if (mtu2 > 0) {
+			if (mtu3 > 0) {
+				return (min(mtu2, mtu3));
+			} else {
+				return (mtu2);
+			}
+		} else {
+			return (mtu3);
+		}
+	}
+}
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+void
+sctp_hc_set_mtu(union sctp_sockstore *addr, uint16_t fibnum, uint32_t mtu)
+{
+	struct in_conninfo inc;
+
+	memset(&inc, 0, sizeof(struct in_conninfo));
+	inc.inc_fibnum = fibnum;
+	switch (addr->sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		inc.inc_faddr = addr->sin.sin_addr;
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		inc.inc_flags |= INC_ISIPV6;
+		inc.inc6_faddr = addr->sin6.sin6_addr;
+		break;
+#endif
+	default:
+		return;
+	}
+	tcp_hc_updatemtu(&inc, (u_long)mtu);
+}
+
+uint32_t
+sctp_hc_get_mtu(union sctp_sockstore *addr, uint16_t fibnum)
+{
+	struct in_conninfo inc;
+
+	memset(&inc, 0, sizeof(struct in_conninfo));
+	inc.inc_fibnum = fibnum;
+	switch (addr->sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		inc.inc_faddr = addr->sin.sin_addr;
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		inc.inc_flags |= INC_ISIPV6;
+		inc.inc6_faddr = addr->sin6.sin6_addr;
+		break;
+#endif
+	default:
+		return (0);
+	}
+	return ((uint32_t)tcp_hc_getmtu(&inc));
+}
+#endif
+
+void
+sctp_set_state(struct sctp_tcb *stcb, int new_state)
+{
+#if defined(KDTRACE_HOOKS)
+	int old_state = stcb->asoc.state;
+#endif
+
+	KASSERT((new_state & ~SCTP_STATE_MASK) == 0,
+	        ("sctp_set_state: Can't set substate (new_state = %x)",
+	        new_state));
+	stcb->asoc.state = (stcb->asoc.state & ~SCTP_STATE_MASK) | new_state;
+	if ((new_state == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+	    (new_state == SCTP_STATE_SHUTDOWN_SENT) ||
+	    (new_state == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+		SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
+	}
+#if defined(KDTRACE_HOOKS)
+	if (((old_state & SCTP_STATE_MASK) != new_state) &&
+	    !(((old_state & SCTP_STATE_MASK) == SCTP_STATE_EMPTY) &&
+	      (new_state == SCTP_STATE_INUSE))) {
+		SCTP_PROBE6(state__change, NULL, stcb, NULL, stcb, NULL, old_state);
+	}
+#endif
+}
+
+void
+sctp_add_substate(struct sctp_tcb *stcb, int substate)
+{
+#if defined(KDTRACE_HOOKS)
+	int old_state = stcb->asoc.state;
+#endif
+
+	KASSERT((substate & SCTP_STATE_MASK) == 0,
+	        ("sctp_add_substate: Can't set state (substate = %x)",
+	        substate));
+	stcb->asoc.state |= substate;
+#if defined(KDTRACE_HOOKS)
+	if (((substate & SCTP_STATE_ABOUT_TO_BE_FREED) &&
+	     ((old_state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) ||
+	    ((substate & SCTP_STATE_SHUTDOWN_PENDING) &&
+	     ((old_state & SCTP_STATE_SHUTDOWN_PENDING) == 0))) {
+		SCTP_PROBE6(state__change, NULL, stcb, NULL, stcb, NULL, old_state);
+	}
+#endif
+}
+