text: /*-
   * 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.
   */
  
  #if defined(__FreeBSD__) && !defined(__Userspace__)
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD$");
  #endif
  
  #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 = sb->sb_cc;
  	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->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 optimisitic 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 = inp->sctp_frag_point;
  	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);
  	}
  	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, 0);
  
  	/* 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) {
  		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_add_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_add_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));
  
  		/* run function on this one */
  		(*it->function_assoc)(it->inp, it->stcb, it->pointer, it->val);
  
  		/*
  		 * we lie here, it really needs to have its own type but
  		 * first I must verify that this won't effect things :-0
  		 */
  		if (it->no_chunk_output == 0)
  			sctp_chunk_output(it->inp, it->stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
  
  		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_add_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) &&
  	    (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)) {
  			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 = 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_add_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,
  		 * ususually 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)) {
  			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_PF)) {
  			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 ususually 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, ususually
  		 * 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_chage
  		 * 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_chage
  		 * 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) {
  			SCTP_INP_DECR_REF(inp);
  			tmr->ep = NULL;
  		}
  		if (tmr->tcb != NULL) {
  			atomic_add_int(&stcb->asoc.refcnt, -1);
  			tmr->tcb = NULL;
  		}
  		if (tmr->net != NULL) {
  			/*
  			 * Can't use net, since it doesn't work for
  			 * SCTP_TIMER_TYPE_ASCONF.
  			 */
  			sctp_free_remote_addr((struct sctp_nets *)tmr->net);
  			tmr->net = NULL;
  		}
  	} 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)
  {
  	uint32_t tlen = 0;
  	struct mbuf *at;
  
  	at = m;
  	while (at) {
  		tlen += SCTP_BUF_LEN(at);
  		at = SCTP_BUF_NEXT(at);
  	}
  	return (tlen);
  }
  
  void
  sctp_mtu_size_reset(struct sctp_inpcb *inp,
      struct sctp_association *asoc, uint32_t mtu)
  {
  	/*
  	 * Reset the P-MTU size on this association, this involves changing
  	 * the asoc MTU, going through ANY chunk+overhead larger than mtu to
  	 * allow the DF flag to be cleared.
  	 */
  	struct sctp_tmit_chunk *chk;
  	unsigned int eff_mtu, ovh;
  
  	asoc->smallest_mtu = mtu;
  	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
  		ovh = SCTP_MIN_OVERHEAD;
  	} else {
  		ovh = SCTP_MIN_V4_OVERHEAD;
  	}
  	eff_mtu = mtu - ovh;
  	TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
  		if (chk->send_size > eff_mtu) {
  			chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
  		}
  	}
  	TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
  		if (chk->send_size > eff_mtu) {
  			chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
  		}
  	}
  }
  
  /*
   * 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 measurment */
  		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;
  	unsigned int notif_len;
  	uint16_t abort_len;
  	unsigned int i;
  #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"));
  	if (stcb == NULL) {
  		return;
  	}
  	if (sctp_stcb_is_feature_on(stcb->sctp_ep, 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(stcb->sctp_ep, stcb,
  			                  control,
  			                  &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_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 (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
  	     (stcb->sctp_ep->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(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) {
  			SCTP_SOCKET_UNLOCK(so, 1);
  			return;
  		}
  	}
  #endif
  	if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
  	     (stcb->sctp_ep->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;
  
  	if ((stcb == NULL) ||
  	    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_NOT_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;
  
  	if ((stcb == NULL) ||
  	    (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_NOT_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;
  
  	if ((stcb == NULL) ||
  	    (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_NOT_HELD, so_locked);
  }
  
  static void
  sctp_notify_adaptation_layer(struct sctp_tcb *stcb)
  {
  	struct mbuf *m_notify;
  	struct sctp_adaptation_event *sai;
  	struct sctp_queued_to_read *control;
  
  	if ((stcb == NULL) ||
  	    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_NOT_HELD, SCTP_SO_NOT_LOCKED);
  }
  
  /* This always must be called with the read-queue LOCKED in the INP */
  static void
  sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb, uint32_t error,
  					uint32_t val, int so_locked)
  {
  	struct mbuf *m_notify;
  	struct sctp_pdapi_event *pdapi;
  	struct sctp_queued_to_read *control;
  	struct sockbuf *sb;
  
  	if ((stcb == NULL) ||
  	    sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_PDAPIEVNT)) {
  		/* event not enabled */
  		return;
  	}
  	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
  		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 = (val >> 16);
  	pdapi->pdapi_seq = (val & 0x0000ffff);
  	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;
  	if (stcb->asoc.control_pdapi)
  		TAILQ_INSERT_AFTER(&stcb->sctp_ep->read_queue, stcb->asoc.control_pdapi,  control, next);
  	else {
  		/* we really should not see this case */
  		TAILQ_INSERT_TAIL(&stcb->sctp_ep->read_queue, 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)
  {
  	struct mbuf *m_notify;
  	struct sctp_shutdown_event *sse;
  	struct sctp_queued_to_read *control;
  
  	/*
  	 * 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_NOT_HELD, SCTP_SO_NOT_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;
  
  	if ((stcb == NULL) ||
  	    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_NOT_HELD, so_locked);
  }
  
  void
  sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin, uint16_t numberout, int flag)
  {
  	struct mbuf *m_notify;
  	struct sctp_queued_to_read *control;
  	struct sctp_stream_change_event *stradd;
  
  	if ((stcb == NULL) ||
  	    (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 = numberin;
  	stradd->strchange_outstrms = numberout;
  	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_NOT_HELD, SCTP_SO_NOT_LOCKED);
  }
  
  void
  sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag)
  {
  	struct mbuf *m_notify;
  	struct sctp_queued_to_read *control;
  	struct sctp_assoc_reset_event *strasoc;
  
  	if ((stcb == NULL) ||
  	    (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 = sending_tsn;
  	strasoc->assocreset_remote_tsn = recv_tsn;
  	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_NOT_HELD, SCTP_SO_NOT_LOCKED);
  }
  
  static void
  sctp_notify_stream_reset(struct sctp_tcb *stcb,
      int number_entries, uint16_t * list, int flag)
  {
  	struct mbuf *m_notify;
  	struct sctp_queued_to_read *control;
  	struct sctp_stream_reset_event *strreset;
  	int len;
  
  	if ((stcb == NULL) ||
  	    (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_NOT_HELD, SCTP_SO_NOT_LOCKED);
  }
  
  static void
  sctp_notify_remote_error(struct sctp_tcb *stcb, uint16_t error, struct sctp_error_chunk *chunk)
  {
  	struct mbuf *m_notify;
  	struct sctp_remote_error *sre;
  	struct sctp_queued_to_read *control;
  	unsigned int notif_len;
  	uint16_t chunk_len;
  
  	if ((stcb == NULL) ||
  	    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_NOT_HELD, SCTP_SO_NOT_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)
  {
  	if ((stcb == NULL) ||
  	    (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)) {
  		/* If the socket is gone we are out of here */
  		return;
  	}
  #if (defined(__FreeBSD__) || defined(_WIN32)) && !defined(__Userspace__)
  	if (stcb->sctp_socket->so_rcv.sb_state & SBS_CANTRCVMORE) {
  #else
  	if (stcb->sctp_socket->so_state & SS_CANTRCVMORE) {
  #endif
  		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 ((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;
  		}
  	}
  	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);
  		}
  		if (stcb->asoc.auth_supported == 0) {
  			sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
  			                NULL, 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 (stcb->sctp_ep->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);
  				stcb->sctp_ep->recv_callback(stcb->sctp_socket, addr, NULL, 0, rcv, 0, stcb->sctp_ep->ulp_info);
  				SCTP_TCB_LOCK(stcb);
  				atomic_subtract_int(&stcb->asoc.refcnt, 1);
  			}
  		}
  #endif
  		break;
  	case SCTP_NOTIFY_INTERFACE_DOWN:
  		{
  			struct sctp_nets *net;
  
  			net = (struct sctp_nets *)data;
  			sctp_notify_peer_addr_change(stcb, SCTP_ADDR_UNREACHABLE,
  			    (struct sockaddr *)&net->ro._l_addr, error, so_locked);
  			break;
  		}
  	case SCTP_NOTIFY_INTERFACE_UP:
  		{
  			struct sctp_nets *net;
  
  			net = (struct sctp_nets *)data;
  			sctp_notify_peer_addr_change(stcb, SCTP_ADDR_AVAILABLE,
  			    (struct sockaddr *)&net->ro._l_addr, error, so_locked);
  			break;
  		}
  	case SCTP_NOTIFY_INTERFACE_CONFIRMED:
  		{
  			struct sctp_nets *net;
  
  			net = (struct sctp_nets *)data;
  			sctp_notify_peer_addr_change(stcb, SCTP_ADDR_CONFIRMED,
  			    (struct sockaddr *)&net->ro._l_addr, 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:
  		{
  			uint32_t val;
  			val = *((uint32_t *)data);
  
  			sctp_notify_partial_delivery_indication(stcb, error, val, 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_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
  			                NULL, so_locked);
  		}
  		break;
  	case SCTP_NOTIFY_STR_RESET_SEND:
  		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_OUTGOING_SSN);
  		break;
  	case SCTP_NOTIFY_STR_RESET_RECV:
  		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_INCOMING);
  		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));
  		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));
  		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));
  		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));
  		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);
  		break;
  	case SCTP_NOTIFY_AUTH_NEW_KEY:
  		sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY, error,
  		                           (uint16_t)(uintptr_t)data,
  		                           so_locked);
  		break;
  	case SCTP_NOTIFY_AUTH_FREE_KEY:
  		sctp_notify_authentication(stcb, SCTP_AUTH_FREE_KEY, error,
  		                           (uint16_t)(uintptr_t)data,
  		                           so_locked);
  		break;
  	case SCTP_NOTIFY_NO_PEER_AUTH:
  		sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, error,
  		                           (uint16_t)(uintptr_t)data,
  		                           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);
  		break;
  	default:
  		SCTPDBG(SCTP_DEBUG_UTIL1, "%s: unknown notification %xh (%u)\n",
  			__func__, notification, notification);
  		break;
  	}			/* end switch */
  }
  
  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, 1);
  			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
  	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))) {
  		stcb->sctp_ep->sctp_flags |= 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_TCB_SEND_LOCK(stcb);
  	SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
  	/* Tell them we lost the asoc */
  	sctp_report_all_outbound(stcb, error, so_locked);
  	SCTP_TCB_SEND_UNLOCK(stcb);
  	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__)
  	error = sblock(&old_so->so_rcv, waitflags);
  	if (error) {
  		/* Gak, can't get sblock, 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 sb-lock on the old socket */
  #if defined(__APPLE__) && !defined(__Userspace__)
  	sbunlock(&old_so->so_rcv, 1);
  #endif
  
  #if defined(__FreeBSD__) && !defined(__Userspace__)
  	sbunlock(&old_so->so_rcv);
  #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)) {
  #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 == 0)
  		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 == 0)
  			SCTP_INP_READ_UNLOCK(inp);
  		return;
  	}
  	if (!(control->spec_flags & M_NOTIFICATION)) {
  		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) {
  		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 (inp_read_lock_held == 0)
  		SCTP_INP_READ_UNLOCK(inp);
  #if defined(__Userspace__)
  	sctp_invoke_recv_callback(inp, stcb, control, inp_read_lock_held);
  #endif
  	if (inp && inp->sctp_socket) {
  		sctp_wakeup_the_read_socket(inp, stcb, so_locked);
  	}
  }
  
  /*************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);
  }
  
  #ifdef SCTP_MBCNT_LOGGING
  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;
  	}
  	asoc->chunks_on_out_queue -= chk_cnt;
  	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);
  	}
  	if (asoc->total_output_queue_size >= tp1->book_size) {
  		atomic_add_int(&asoc->total_output_queue_size, -tp1->book_size);
  	} else {
  		asoc->total_output_queue_size = 0;
  	}
  
  	if (stcb->sctp_socket && (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) ||
  				  ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)))) {
  		if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) {
  			stcb->sctp_socket->so_snd.sb_cc -= tp1->book_size;
  		} else {
  			stcb->sctp_socket->so_snd.sb_cc = 0;
  		}
  	}
  }
  
  #endif
  
  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
  	sid = tp1->rec.data.sid;
  	mid = tp1->rec.data.mid;
  	if (sent || !(tp1->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG)) {
  		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.
  		 */
  		SCTP_TCB_SEND_LOCK(stcb);
  		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;
  			}
  		}
  		SCTP_TCB_SEND_UNLOCK(stcb);
  	}
  	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_add_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, so->so_rcv.sb_cc, uio->uio_resid);
  #else
  		sctp_misc_ints(SCTP_SORECV_ENTER,
  			       rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, uio_resid(uio));
  #endif
  #else
  		sctp_misc_ints(SCTP_SORECV_ENTER,
  			       rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, (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, so->so_rcv.sb_cc, uio->uio_resid);
  #else
  		sctp_misc_ints(SCTP_SORECV_ENTERPL,
  			       rwnd_req, block_allowed, so->so_rcv.sb_cc, uio_resid(uio));
  #endif
  #else
  		sctp_misc_ints(SCTP_SORECV_ENTERPL,
  			       rwnd_req, block_allowed, so->so_rcv.sb_cc, (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 = sblock(&so->so_rcv, (block_allowed ? SBL_WAIT : 0));
  #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) && (so->so_rcv.sb_cc == 0)) {
  #else
  	if ((so->so_state & SS_CANTRCVMORE) && (so->so_rcv.sb_cc == 0)) {
  #endif
  		if (so->so_error) {
  			error = so->so_error;
  			if ((in_flags & MSG_PEEK) == 0)
  				so->so_error = 0;
  			goto out;
  		} else {
  			if (so->so_rcv.sb_cc == 0) {
  				/* indicate EOF */
  				error = 0;
  				goto out;
  			}
  		}
  	}
  	if (so->so_rcv.sb_cc <= held_length) {
  		if (so->so_error) {
  			error = so->so_error;
  			if ((in_flags & MSG_PEEK) == 0) {
  				so->so_error = 0;
  			}
  			goto out;
  		}
  		if ((so->so_rcv.sb_cc == 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) {
  			error = sbwait(&so->so_rcv);
  			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) && (so->so_rcv.sb_cc != 0)) {
  #ifdef INVARIANTS
  			panic("Huh, its non zero and nothing on control?");
  #endif
  			so->so_rcv.sb_cc = 0;
  		}
  		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 hiddend 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 notificaiton 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 = so->so_rcv.sb_cc;
  		control->held_length = so->so_rcv.sb_cc;
  		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, 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);
  					}
  					atomic_subtract_int(&so->so_rcv.sb_cc, cp_len);
  					if ((control->do_not_ref_stcb == 0) &&
  					    stcb) {
  						atomic_subtract_int(&stcb->asoc.sb_cc, 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, 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 .. invarients 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 hiddend 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
  		 * sbunlock() 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 (so->so_rcv.sb_cc <= control->held_length) {
  			error = sbwait(&so->so_rcv);
  			if (error) {
  #if defined(__FreeBSD__) && !defined(__Userspace__)
  				goto release;
  #else
  				goto release_unlocked;
  #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 (so->so_rcv.sb_cc > held_length) {
  				control->held_length = so->so_rcv.sb_cc;
  				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__)
  	sbunlock(&so->so_rcv);
  	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) {
  		sbunlock(&so->so_rcv);
  	}
  #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_add_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,
  				       so->so_rcv.sb_cc);
  		} 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,
  				       so->so_rcv.sb_cc);
  		}
  	}
   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;
  
  			sin6 = (struct sockaddr_in6 *)sa;
  			if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
  				/* Must be non-mapped for connectx */
  				return (EINVAL);
  			}
  			incr = (unsigned int)sizeof(struct sockaddr_in6);
  #ifdef HAVE_SA_LEN
  			if (sa->sa_len != incr) {
  				return (EINVAL);
  			}
  #endif
  			(*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 void
  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;
   out:
  	m_freem(m);
  }
  
  #ifdef INET
  static void
  sctp_recv_icmp_tunneled_packet(int cmd, struct sockaddr *sa, void *vip, void *ctx SCTP_UNUSED)
  {
  	struct ip *outer_ip, *inner_ip;
  	struct sctphdr *sh;
  	struct icmp *icmp;
  	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 = (struct ip *)vip;
  	icmp = (struct icmp *)((caddr_t)inner_ip -
  	    (sizeof(struct icmp) - sizeof(struct 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) &&
  		    (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(int cmd, struct sockaddr *sa, void *d, void *ctx SCTP_UNUSED)
  {
  	struct ip6ctlparam *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;
  
  	ip6cp = (struct ip6ctlparam *)d;
  	/*
  	 * 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) &&
  		    (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 writting!
  	 */
  #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 writting!
  	 */
  	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
  }
  
  