xref: /freebsd/sys/netinet/sctputil.c (revision 03b0b021637c91bc292b2cd7a0bf65a226905e66)

/*-
 * Copyright (c) 2001-2006, Cisco Systems, Inc. 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.
 */

/* $KAME: sctputil.c,v 1.37 2005/03/07 23:26:09 itojun Exp $	 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");


#include "opt_ipsec.h"
#include "opt_compat.h"
#include "opt_inet6.h"
#include "opt_inet.h"
#include "opt_sctp.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/fcntl.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/file.h>		/* for struct knote */
#include <sys/kernel.h>
#include <sys/event.h>
#include <sys/poll.h>

#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <sys/jail.h>

#include <sys/callout.h>

#include <net/radix.h>
#include <net/route.h>

#ifdef INET6
#include <sys/domain.h>
#endif

#include <sys/limits.h>
#include <sys/mac.h>
#include <sys/mutex.h>

#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>

#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>

#include <netinet6/in6_pcb.h>

#include <netinet6/scope6_var.h>
#endif				/* INET6 */

#ifdef IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
#endif				/* IPSEC */

#include <netinet/sctp_os.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_var.h>
#ifdef INET6
#include <netinet6/sctp6_var.h>
#endif
#include <netinet/sctp_header.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_crc32.h>
#include <netinet/sctp_indata.h>/* for sctp_deliver_data() */
#include <netinet/sctp_auth.h>
#include <netinet/sctp_asconf.h>

extern int sctp_warm_the_crc32_table;

#define NUMBER_OF_MTU_SIZES 18

#ifdef SCTP_DEBUG
extern uint32_t sctp_debug_on;

#endif


#ifdef SCTP_STAT_LOGGING
int global_sctp_cwnd_log_at = 0;
int global_sctp_cwnd_log_rolled = 0;
struct sctp_cwnd_log sctp_clog[SCTP_STAT_LOG_SIZE];

static uint32_t
sctp_get_time_of_event(void)
{
	struct timeval now;
	uint32_t timeval;

	SCTP_GETPTIME_TIMEVAL(&now);
	timeval = (now.tv_sec % 0x00000fff);
	timeval <<= 20;
	timeval |= now.tv_usec & 0xfffff;
	return (timeval);
}


void
sctp_clr_stat_log(void)
{
	global_sctp_cwnd_log_at = 0;
	global_sctp_cwnd_log_rolled = 0;
}


void
sctp_sblog(struct sockbuf *sb,
    struct sctp_tcb *stcb, int from, int incr)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_SB;
	sctp_clog[sctp_cwnd_log_at].x.sb.stcb = stcb;
	sctp_clog[sctp_cwnd_log_at].x.sb.so_sbcc = sb->sb_cc;
	if (stcb)
		sctp_clog[sctp_cwnd_log_at].x.sb.stcb_sbcc = stcb->asoc.sb_cc;
	else
		sctp_clog[sctp_cwnd_log_at].x.sb.stcb_sbcc = 0;
	sctp_clog[sctp_cwnd_log_at].x.sb.incr = incr;
}

void
sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = 0;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_CLOSE;
	sctp_clog[sctp_cwnd_log_at].x.close.inp = (void *)inp;
	sctp_clog[sctp_cwnd_log_at].x.close.sctp_flags = inp->sctp_flags;
	if (stcb) {
		sctp_clog[sctp_cwnd_log_at].x.close.stcb = (void *)stcb;
		sctp_clog[sctp_cwnd_log_at].x.close.state = (uint16_t) stcb->asoc.state;
	} else {
		sctp_clog[sctp_cwnd_log_at].x.close.stcb = 0;
		sctp_clog[sctp_cwnd_log_at].x.close.state = 0;
	}
	sctp_clog[sctp_cwnd_log_at].x.close.loc = loc;
}


void
rto_logging(struct sctp_nets *net, int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_RTT;
	sctp_clog[sctp_cwnd_log_at].x.rto.net = (void *)net;
	sctp_clog[sctp_cwnd_log_at].x.rto.rtt = net->prev_rtt;
	sctp_clog[sctp_cwnd_log_at].x.rto.rttvar = net->rtt_variance;
	sctp_clog[sctp_cwnd_log_at].x.rto.direction = net->rto_variance_dir;
}

void
sctp_log_strm_del_alt(uint32_t tsn, uint16_t sseq, int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_STRM;
	sctp_clog[sctp_cwnd_log_at].x.strlog.n_tsn = tsn;
	sctp_clog[sctp_cwnd_log_at].x.strlog.n_sseq = sseq;
	sctp_clog[sctp_cwnd_log_at].x.strlog.e_tsn = 0;
	sctp_clog[sctp_cwnd_log_at].x.strlog.e_sseq = 0;
}

void
sctp_log_nagle_event(struct sctp_tcb *stcb, int action)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) action;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_NAGLE;
	sctp_clog[sctp_cwnd_log_at].x.nagle.stcb = (void *)stcb;
	sctp_clog[sctp_cwnd_log_at].x.nagle.total_flight = stcb->asoc.total_flight;
	sctp_clog[sctp_cwnd_log_at].x.nagle.total_in_queue = stcb->asoc.total_output_queue_size;
	sctp_clog[sctp_cwnd_log_at].x.nagle.count_in_queue = stcb->asoc.chunks_on_out_queue;
	sctp_clog[sctp_cwnd_log_at].x.nagle.count_in_flight = stcb->asoc.total_flight_count;
}


void
sctp_log_sack(uint32_t old_cumack, uint32_t cumack, uint32_t tsn, uint16_t gaps, uint16_t dups, int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_SACK;
	sctp_clog[sctp_cwnd_log_at].x.sack.cumack = cumack;
	sctp_clog[sctp_cwnd_log_at].x.sack.oldcumack = old_cumack;
	sctp_clog[sctp_cwnd_log_at].x.sack.tsn = tsn;
	sctp_clog[sctp_cwnd_log_at].x.sack.numGaps = gaps;
	sctp_clog[sctp_cwnd_log_at].x.sack.numDups = dups;
}

void
sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_MAP;
	sctp_clog[sctp_cwnd_log_at].x.map.base = map;
	sctp_clog[sctp_cwnd_log_at].x.map.cum = cum;
	sctp_clog[sctp_cwnd_log_at].x.map.high = high;
}

void
sctp_log_fr(uint32_t biggest_tsn, uint32_t biggest_new_tsn, uint32_t tsn,
    int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_FR;
	sctp_clog[sctp_cwnd_log_at].x.fr.largest_tsn = biggest_tsn;
	sctp_clog[sctp_cwnd_log_at].x.fr.largest_new_tsn = biggest_new_tsn;
	sctp_clog[sctp_cwnd_log_at].x.fr.tsn = tsn;
}


void
sctp_log_mb(struct mbuf *m, int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_MBUF;
	sctp_clog[sctp_cwnd_log_at].x.mb.mp = m;
	sctp_clog[sctp_cwnd_log_at].x.mb.mbuf_flags = (uint8_t) (m->m_flags);
	sctp_clog[sctp_cwnd_log_at].x.mb.size = (uint16_t) (m->m_len);
	sctp_clog[sctp_cwnd_log_at].x.mb.data = m->m_data;
	if (m->m_flags & M_EXT) {
		sctp_clog[sctp_cwnd_log_at].x.mb.ext = m->m_ext.ext_buf;
		sctp_clog[sctp_cwnd_log_at].x.mb.refcnt = (uint8_t) (*m->m_ext.ref_cnt);
	} else {
		sctp_clog[sctp_cwnd_log_at].x.mb.ext = 0;
		sctp_clog[sctp_cwnd_log_at].x.mb.refcnt = 0;
	}
}


void
sctp_log_strm_del(struct sctp_queued_to_read *control, struct sctp_queued_to_read *poschk,
    int from)
{
	int sctp_cwnd_log_at;

	if (control == NULL) {
		printf("Gak log of NULL?\n");
		return;
	}
	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_STRM;
	sctp_clog[sctp_cwnd_log_at].x.strlog.n_tsn = control->sinfo_tsn;
	sctp_clog[sctp_cwnd_log_at].x.strlog.n_sseq = control->sinfo_ssn;
	if (poschk != NULL) {
		sctp_clog[sctp_cwnd_log_at].x.strlog.e_tsn = poschk->sinfo_tsn;
		sctp_clog[sctp_cwnd_log_at].x.strlog.e_sseq = poschk->sinfo_ssn;
	} else {
		sctp_clog[sctp_cwnd_log_at].x.strlog.e_tsn = 0;
		sctp_clog[sctp_cwnd_log_at].x.strlog.e_sseq = 0;
	}
}

void
sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_CWND;
	sctp_clog[sctp_cwnd_log_at].x.cwnd.net = net;
	if (stcb->asoc.send_queue_cnt > 255)
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_send = 255;
	else
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
	if (stcb->asoc.stream_queue_cnt > 255)
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_str = 255;
	else
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;

	if (net) {
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cwnd_new_value = net->cwnd;
		sctp_clog[sctp_cwnd_log_at].x.cwnd.inflight = net->flight_size;
		sctp_clog[sctp_cwnd_log_at].x.cwnd.pseudo_cumack = net->pseudo_cumack;
		sctp_clog[sctp_cwnd_log_at].x.cwnd.meets_pseudo_cumack = net->new_pseudo_cumack;
		sctp_clog[sctp_cwnd_log_at].x.cwnd.need_new_pseudo_cumack = net->find_pseudo_cumack;
	}
	if (SCTP_CWNDLOG_PRESEND == from) {
		sctp_clog[sctp_cwnd_log_at].x.cwnd.meets_pseudo_cumack = stcb->asoc.peers_rwnd;
	}
	sctp_clog[sctp_cwnd_log_at].x.cwnd.cwnd_augment = augment;
}

void
sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_LOCK_EVENT;
	if (inp) {
		sctp_clog[sctp_cwnd_log_at].x.lock.sock = (void *)inp->sctp_socket;

	} else {
		sctp_clog[sctp_cwnd_log_at].x.lock.sock = (void *)NULL;
	}
	sctp_clog[sctp_cwnd_log_at].x.lock.inp = (void *)inp;
	if (stcb) {
		sctp_clog[sctp_cwnd_log_at].x.lock.tcb_lock = mtx_owned(&stcb->tcb_mtx);
	} else {
		sctp_clog[sctp_cwnd_log_at].x.lock.tcb_lock = SCTP_LOCK_UNKNOWN;
	}
	if (inp) {
		sctp_clog[sctp_cwnd_log_at].x.lock.inp_lock = mtx_owned(&inp->inp_mtx);
		sctp_clog[sctp_cwnd_log_at].x.lock.create_lock = mtx_owned(&inp->inp_create_mtx);
	} else {
		sctp_clog[sctp_cwnd_log_at].x.lock.inp_lock = SCTP_LOCK_UNKNOWN;
		sctp_clog[sctp_cwnd_log_at].x.lock.create_lock = SCTP_LOCK_UNKNOWN;
	}
	sctp_clog[sctp_cwnd_log_at].x.lock.info_lock = mtx_owned(&sctppcbinfo.ipi_ep_mtx);
	if (inp->sctp_socket) {
		sctp_clog[sctp_cwnd_log_at].x.lock.sock_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
		sctp_clog[sctp_cwnd_log_at].x.lock.sockrcvbuf_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
		sctp_clog[sctp_cwnd_log_at].x.lock.socksndbuf_lock = mtx_owned(&(inp->sctp_socket->so_snd.sb_mtx));
	} else {
		sctp_clog[sctp_cwnd_log_at].x.lock.sock_lock = SCTP_LOCK_UNKNOWN;
		sctp_clog[sctp_cwnd_log_at].x.lock.sockrcvbuf_lock = SCTP_LOCK_UNKNOWN;
		sctp_clog[sctp_cwnd_log_at].x.lock.socksndbuf_lock = SCTP_LOCK_UNKNOWN;
	}
}

void
sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *net, int error, int burst, uint8_t from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_MAXBURST;
	sctp_clog[sctp_cwnd_log_at].x.cwnd.net = net;
	sctp_clog[sctp_cwnd_log_at].x.cwnd.cwnd_new_value = error;
	sctp_clog[sctp_cwnd_log_at].x.cwnd.inflight = net->flight_size;
	sctp_clog[sctp_cwnd_log_at].x.cwnd.cwnd_augment = burst;
	if (stcb->asoc.send_queue_cnt > 255)
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_send = 255;
	else
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
	if (stcb->asoc.stream_queue_cnt > 255)
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_str = 255;
	else
		sctp_clog[sctp_cwnd_log_at].x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
}

void
sctp_log_rwnd(uint8_t from, uint32_t peers_rwnd, uint32_t snd_size, uint32_t overhead)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_RWND;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.rwnd = peers_rwnd;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.send_size = snd_size;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.overhead = overhead;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.new_rwnd = 0;
}

void
sctp_log_rwnd_set(uint8_t from, uint32_t peers_rwnd, uint32_t flight_size, uint32_t overhead, uint32_t a_rwndval)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_RWND;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.rwnd = peers_rwnd;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.send_size = flight_size;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.overhead = overhead;
	sctp_clog[sctp_cwnd_log_at].x.rwnd.new_rwnd = a_rwndval;
}

void
sctp_log_mbcnt(uint8_t from, uint32_t total_oq, uint32_t book, uint32_t total_mbcnt_q, uint32_t mbcnt)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_MBCNT;
	sctp_clog[sctp_cwnd_log_at].x.mbcnt.total_queue_size = total_oq;
	sctp_clog[sctp_cwnd_log_at].x.mbcnt.size_change = book;
	sctp_clog[sctp_cwnd_log_at].x.mbcnt.total_queue_mb_size = total_mbcnt_q;
	sctp_clog[sctp_cwnd_log_at].x.mbcnt.mbcnt_change = mbcnt;
}

void
sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_MISC_EVENT;
	sctp_clog[sctp_cwnd_log_at].x.misc.log1 = a;
	sctp_clog[sctp_cwnd_log_at].x.misc.log2 = b;
	sctp_clog[sctp_cwnd_log_at].x.misc.log3 = c;
	sctp_clog[sctp_cwnd_log_at].x.misc.log4 = d;
}

void
sctp_wakeup_log(struct sctp_tcb *stcb, uint32_t cumtsn, uint32_t wake_cnt, int from)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_WAKE;
	sctp_clog[sctp_cwnd_log_at].x.wake.stcb = (void *)stcb;
	sctp_clog[sctp_cwnd_log_at].x.wake.wake_cnt = wake_cnt;
	sctp_clog[sctp_cwnd_log_at].x.wake.flight = stcb->asoc.total_flight_count;
	sctp_clog[sctp_cwnd_log_at].x.wake.send_q = stcb->asoc.send_queue_cnt;
	sctp_clog[sctp_cwnd_log_at].x.wake.sent_q = stcb->asoc.sent_queue_cnt;

	if (stcb->asoc.stream_queue_cnt < 0xff)
		sctp_clog[sctp_cwnd_log_at].x.wake.stream_qcnt = (uint8_t) stcb->asoc.stream_queue_cnt;
	else
		sctp_clog[sctp_cwnd_log_at].x.wake.stream_qcnt = 0xff;

	if (stcb->asoc.chunks_on_out_queue < 0xff)
		sctp_clog[sctp_cwnd_log_at].x.wake.chunks_on_oque = (uint8_t) stcb->asoc.chunks_on_out_queue;
	else
		sctp_clog[sctp_cwnd_log_at].x.wake.chunks_on_oque = 0xff;

	sctp_clog[sctp_cwnd_log_at].x.wake.sctpflags = 0;
	/* set in the defered mode stuff */
	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE)
		sctp_clog[sctp_cwnd_log_at].x.wake.sctpflags |= 1;
	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT)
		sctp_clog[sctp_cwnd_log_at].x.wake.sctpflags |= 2;
	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT)
		sctp_clog[sctp_cwnd_log_at].x.wake.sctpflags |= 4;
	/* what about the sb */
	if (stcb->sctp_socket) {
		struct socket *so = stcb->sctp_socket;

		sctp_clog[sctp_cwnd_log_at].x.wake.sbflags = (uint8_t) ((so->so_snd.sb_flags & 0x00ff));
	} else {
		sctp_clog[sctp_cwnd_log_at].x.wake.sbflags = 0xff;
	}
}

void
sctp_log_block(uint8_t from, struct socket *so, struct sctp_association *asoc, int sendlen)
{
	int sctp_cwnd_log_at;

	SCTP_STATLOG_GETREF(sctp_cwnd_log_at);
	sctp_clog[sctp_cwnd_log_at].from = (uint8_t) from;
	sctp_clog[sctp_cwnd_log_at].time_event = sctp_get_time_of_event();
	sctp_clog[sctp_cwnd_log_at].event_type = (uint8_t) SCTP_LOG_EVENT_BLOCK;
	sctp_clog[sctp_cwnd_log_at].x.blk.onsb = asoc->total_output_queue_size;
	sctp_clog[sctp_cwnd_log_at].x.blk.send_sent_qcnt = (uint16_t) (asoc->send_queue_cnt + asoc->sent_queue_cnt);
	sctp_clog[sctp_cwnd_log_at].x.blk.peer_rwnd = asoc->peers_rwnd;
	sctp_clog[sctp_cwnd_log_at].x.blk.stream_qcnt = (uint16_t) asoc->stream_queue_cnt;
	sctp_clog[sctp_cwnd_log_at].x.blk.chunks_on_oque = (uint16_t) asoc->chunks_on_out_queue;
	sctp_clog[sctp_cwnd_log_at].x.blk.flight_size = (uint16_t) (asoc->total_flight / 1024);
	sctp_clog[sctp_cwnd_log_at].x.blk.sndlen = sendlen;
}

int
sctp_fill_stat_log(struct mbuf *m)
{
	int sctp_cwnd_log_at;
	struct sctp_cwnd_log_req *req;
	size_t size_limit;
	int num, i, at, cnt_out = 0;

	if (m == NULL)
		return (EINVAL);

	size_limit = (m->m_len - sizeof(struct sctp_cwnd_log_req));
	if (size_limit < sizeof(struct sctp_cwnd_log)) {
		return (EINVAL);
	}
	sctp_cwnd_log_at = global_sctp_cwnd_log_at;
	req = mtod(m, struct sctp_cwnd_log_req *);
	num = size_limit / sizeof(struct sctp_cwnd_log);
	if (global_sctp_cwnd_log_rolled) {
		req->num_in_log = SCTP_STAT_LOG_SIZE;
	} else {
		req->num_in_log = sctp_cwnd_log_at;
		/*
		 * if the log has not rolled, we don't let you have old
		 * data.
		 */
		if (req->end_at > sctp_cwnd_log_at) {
			req->end_at = sctp_cwnd_log_at;
		}
	}
	if ((num < SCTP_STAT_LOG_SIZE) &&
	    ((global_sctp_cwnd_log_rolled) || (sctp_cwnd_log_at > num))) {
		/* we can't return all of it */
		if (((req->start_at == 0) && (req->end_at == 0)) ||
		    (req->start_at >= SCTP_STAT_LOG_SIZE) ||
		    (req->end_at >= SCTP_STAT_LOG_SIZE)) {
			/* No user request or user is wacked. */
			req->num_ret = num;
			req->end_at = sctp_cwnd_log_at - 1;
			if ((sctp_cwnd_log_at - num) < 0) {
				int cc;

				cc = num - sctp_cwnd_log_at;
				req->start_at = SCTP_STAT_LOG_SIZE - cc;
			} else {
				req->start_at = sctp_cwnd_log_at - num;
			}
		} else {
			/* a user request */
			int cc;

			if (req->start_at > req->end_at) {
				cc = (SCTP_STAT_LOG_SIZE - req->start_at) +
				    (req->end_at + 1);
			} else {

				cc = (req->end_at - req->start_at) + 1;
			}
			if (cc < num) {
				num = cc;
			}
			req->num_ret = num;
		}
	} else {
		/* We can return all  of it */
		req->start_at = 0;
		req->end_at = sctp_cwnd_log_at - 1;
		req->num_ret = sctp_cwnd_log_at;
	}
#ifdef INVARIENTS
	if (req->num_ret > num) {
		panic("Bad statlog get?");
	}
#endif
	for (i = 0, at = req->start_at; i < req->num_ret; i++) {
		req->log[i] = sctp_clog[at];
		cnt_out++;
		at++;
		if (at >= SCTP_STAT_LOG_SIZE)
			at = 0;
	}
	m->m_len = (cnt_out * sizeof(struct sctp_cwnd_log)) + sizeof(struct sctp_cwnd_log_req);
	return (0);
}

#endif

#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;
			printf("\n");
		} else if (sctp_audit_data[i][0] == 0xf0) {
			cnt = 0;
			printf("\n");
		} else if ((sctp_audit_data[i][0] == 0xc0) &&
		    (sctp_audit_data[i][1] == 0x01)) {
			printf("\n");
			cnt = 0;
		}
		printf("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
		    (uint32_t) sctp_audit_data[i][1]);
		cnt++;
		if ((cnt % 14) == 0)
			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;
			printf("\n");
		} else if (sctp_audit_data[i][0] == 0xf0) {
			cnt = 0;
			printf("\n");
		} else if ((sctp_audit_data[i][0] == 0xc0) &&
		    (sctp_audit_data[i][1] == 0x01)) {
			printf("\n");
			cnt = 0;
		}
		printf("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
		    (uint32_t) sctp_audit_data[i][1]);
		cnt++;
		if ((cnt % 14) == 0)
			printf("\n");
	}
	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;
		}
		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;
		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;
		printf("tot_flt_book:%d\n", tot_book);

		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;
		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) {
				printf("net:%x flight was %d corrected to %d\n",
				    (uint32_t) 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)
{
	int s;

	s = splnet();
	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;
	}
	splx(s);
}

#endif

/*
 * a list of sizes based on typical mtu's, used only if next hop size not
 * returned.
 */
static int sctp_mtu_sizes[] = {
	68,
	296,
	508,
	512,
	544,
	576,
	1006,
	1492,
	1500,
	1536,
	2002,
	2048,
	4352,
	4464,
	8166,
	17914,
	32000,
	65535
};

void
sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
{
	struct sctp_association *asoc;
	struct sctp_nets *net;

	asoc = &stcb->asoc;

	callout_stop(&asoc->hb_timer.timer);
	callout_stop(&asoc->dack_timer.timer);
	callout_stop(&asoc->strreset_timer.timer);
	callout_stop(&asoc->asconf_timer.timer);
	callout_stop(&asoc->autoclose_timer.timer);
	callout_stop(&asoc->delayed_event_timer.timer);
	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
		callout_stop(&net->fr_timer.timer);
		callout_stop(&net->pmtu_timer.timer);
	}
}

int
find_next_best_mtu(int totsz)
{
	int i, perfer;

	/*
	 * if we are in here we must find the next best fit based on the
	 * size of the dg that failed to be sent.
	 */
	perfer = 0;
	for (i = 0; i < NUMBER_OF_MTU_SIZES; i++) {
		if (totsz < sctp_mtu_sizes[i]) {
			perfer = i - 1;
			if (perfer < 0)
				perfer = 0;
			break;
		}
	}
	return (sctp_mtu_sizes[perfer]);
}

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 whic 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;
	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);
	m->random_counter++;
}

uint32_t
sctp_select_initial_TSN(struct sctp_pcb *m)
{
	/*
	 * A true implementation should use random selection process to get
	 * the initial stream sequence number, using RFC1750 as a good
	 * guideline
	 */
	u_long x, *xp;
	uint8_t *p;

	if (m->initial_sequence_debug != 0) {
		uint32_t ret;

		ret = m->initial_sequence_debug;
		m->initial_sequence_debug++;
		return (ret);
	}
	if ((m->store_at + sizeof(u_long)) > SCTP_SIGNATURE_SIZE) {
		/* Refill the random store */
		sctp_fill_random_store(m);
	}
	p = &m->random_store[(int)m->store_at];
	xp = (u_long *)p;
	x = *xp;
	m->store_at += sizeof(u_long);
	return (x);
}

uint32_t
sctp_select_a_tag(struct sctp_inpcb *m)
{
	u_long x, not_done;
	struct timeval now;

	SCTP_GETTIME_TIMEVAL(&now);
	not_done = 1;
	while (not_done) {
		x = sctp_select_initial_TSN(&m->sctp_ep);
		if (x == 0) {
			/* we never use 0 */
			continue;
		}
		if (sctp_is_vtag_good(m, x, &now)) {
			not_done = 0;
		}
	}
	return (x);
}


int
sctp_init_asoc(struct sctp_inpcb *m, struct sctp_association *asoc,
    int for_a_init, uint32_t override_tag)
{
	/*
	 * 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;

	/* init all variables to a known value. */
	asoc->state = SCTP_STATE_INUSE;
	asoc->max_burst = m->sctp_ep.max_burst;
	asoc->heart_beat_delay = TICKS_TO_MSEC(m->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]);
	asoc->cookie_life = m->sctp_ep.def_cookie_life;
	asoc->sctp_cmt_on_off = (uint8_t) sctp_cmt_on_off;
#ifdef AF_INET
	asoc->default_tos = m->ip_inp.inp.inp_ip_tos;
#else
	asoc->default_tos = 0;
#endif

#ifdef AF_INET6
	asoc->default_flowlabel = ((struct in6pcb *)m)->in6p_flowinfo;
#else
	asoc->default_flowlabel = 0;
#endif
	if (override_tag) {
		struct timeval now;

		if (sctp_is_vtag_good(m, override_tag, &now)) {
			asoc->my_vtag = override_tag;
		} else {
			return (ENOMEM);
		}

	} else {
		asoc->my_vtag = sctp_select_a_tag(m);
	}
	if (sctp_is_feature_on(m, SCTP_PCB_FLAGS_DONOT_HEARTBEAT))
		asoc->hb_is_disabled = 1;
	else
		asoc->hb_is_disabled = 0;

	asoc->refcnt = 0;
	asoc->assoc_up_sent = 0;
	asoc->assoc_id = asoc->my_vtag;
	asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number = asoc->sending_seq =
	    sctp_select_initial_TSN(&m->sctp_ep);
	/* we are optimisitic here */
	asoc->peer_supports_pktdrop = 1;

	asoc->sent_queue_retran_cnt = 0;

	/* for CMT */
	asoc->last_net_data_came_from = NULL;

	/* This will need to be adjusted */
	asoc->last_cwr_tsn = asoc->init_seq_number - 1;
	asoc->last_acked_seq = asoc->init_seq_number - 1;
	asoc->advanced_peer_ack_point = asoc->last_acked_seq;
	asoc->asconf_seq_in = asoc->last_acked_seq;

	/* here we are different, we hold the next one we expect */
	asoc->str_reset_seq_in = asoc->last_acked_seq + 1;

	asoc->initial_init_rto_max = m->sctp_ep.initial_init_rto_max;
	asoc->initial_rto = m->sctp_ep.initial_rto;

	asoc->max_init_times = m->sctp_ep.max_init_times;
	asoc->max_send_times = m->sctp_ep.max_send_times;
	asoc->def_net_failure = m->sctp_ep.def_net_failure;
	asoc->free_chunk_cnt = 0;

	asoc->iam_blocking = 0;
	/* ECN Nonce initialization */
	asoc->context = m->sctp_context;
	asoc->def_send = m->def_send;
	asoc->ecn_nonce_allowed = 0;
	asoc->receiver_nonce_sum = 1;
	asoc->nonce_sum_expect_base = 1;
	asoc->nonce_sum_check = 1;
	asoc->nonce_resync_tsn = 0;
	asoc->nonce_wait_for_ecne = 0;
	asoc->nonce_wait_tsn = 0;
	asoc->delayed_ack = TICKS_TO_MSEC(m->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]);
	asoc->pr_sctp_cnt = 0;
	asoc->total_output_queue_size = 0;

	if (m->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
		struct in6pcb *inp6;


		/* Its a V6 socket */
		inp6 = (struct in6pcb *)m;
		asoc->ipv6_addr_legal = 1;
		/* Now look at the binding flag to see if V4 will be legal */
		if (
		    (inp6->inp_flags & IN6P_IPV6_V6ONLY)
		    == 0) {
			asoc->ipv4_addr_legal = 1;
		} else {
			/* V4 addresses are NOT legal on the association */
			asoc->ipv4_addr_legal = 0;
		}
	} else {
		/* Its a V4 socket, no - V6 */
		asoc->ipv4_addr_legal = 1;
		asoc->ipv6_addr_legal = 0;
	}


	asoc->my_rwnd = max(m->sctp_socket->so_rcv.sb_hiwat, SCTP_MINIMAL_RWND);
	asoc->peers_rwnd = m->sctp_socket->so_rcv.sb_hiwat;

	asoc->smallest_mtu = m->sctp_frag_point;
	asoc->minrto = m->sctp_ep.sctp_minrto;
	asoc->maxrto = m->sctp_ep.sctp_maxrto;

	asoc->locked_on_sending = NULL;
	asoc->stream_locked_on = 0;
	asoc->ecn_echo_cnt_onq = 0;
	asoc->stream_locked = 0;

	LIST_INIT(&asoc->sctp_local_addr_list);
	TAILQ_INIT(&asoc->nets);
	TAILQ_INIT(&asoc->pending_reply_queue);
	asoc->last_asconf_ack_sent = NULL;
	/* Setup to fill the hb random cache at first HB */
	asoc->hb_random_idx = 4;

	asoc->sctp_autoclose_ticks = m->sctp_ep.auto_close_time;

	/*
	 * Now the stream parameters, here we allocate space for all streams
	 * that we request by default.
	 */
	asoc->streamoutcnt = asoc->pre_open_streams =
	    m->sctp_ep.pre_open_stream_count;
	SCTP_MALLOC(asoc->strmout, struct sctp_stream_out *,
	    asoc->streamoutcnt * sizeof(struct sctp_stream_out),
	    "StreamsOut");
	if (asoc->strmout == NULL) {
		/* big trouble no memory */
		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.
		 */
		asoc->strmout[i].next_sequence_sent = 0x0;
		TAILQ_INIT(&asoc->strmout[i].outqueue);
		asoc->strmout[i].stream_no = i;
		asoc->strmout[i].last_msg_incomplete = 0;
		asoc->strmout[i].next_spoke.tqe_next = 0;
		asoc->strmout[i].next_spoke.tqe_prev = 0;
	}
	/* Now the mapping array */
	asoc->mapping_array_size = SCTP_INITIAL_MAPPING_ARRAY;
	SCTP_MALLOC(asoc->mapping_array, uint8_t *, asoc->mapping_array_size,
	    "MappingArray");
	if (asoc->mapping_array == NULL) {
		SCTP_FREE(asoc->strmout);
		return (ENOMEM);
	}
	memset(asoc->mapping_array, 0, asoc->mapping_array_size);
	/* Now the init of the other outqueues */
	TAILQ_INIT(&asoc->free_chunks);
	TAILQ_INIT(&asoc->free_strmoq);
	TAILQ_INIT(&asoc->out_wheel);
	TAILQ_INIT(&asoc->control_send_queue);
	TAILQ_INIT(&asoc->send_queue);
	TAILQ_INIT(&asoc->sent_queue);
	TAILQ_INIT(&asoc->reasmqueue);
	TAILQ_INIT(&asoc->resetHead);
	asoc->max_inbound_streams = m->sctp_ep.max_open_streams_intome;
	TAILQ_INIT(&asoc->asconf_queue);
	/* authentication fields */
	asoc->authinfo.random = NULL;
	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);

	return (0);
}

int
sctp_expand_mapping_array(struct sctp_association *asoc)
{
	/* mapping array needs to grow */
	uint8_t *new_array;
	uint16_t new_size;

	new_size = asoc->mapping_array_size + SCTP_MAPPING_ARRAY_INCR;
	SCTP_MALLOC(new_array, uint8_t *, new_size, "MappingArray");
	if (new_array == NULL) {
		/* can't get more, forget it */
		printf("No memory for expansion of SCTP mapping array %d\n",
		    new_size);
		return (-1);
	}
	memset(new_array, 0, new_size);
	memcpy(new_array, asoc->mapping_array, asoc->mapping_array_size);
	SCTP_FREE(asoc->mapping_array);
	asoc->mapping_array = new_array;
	asoc->mapping_array_size = new_size;
	return (0);
}

extern unsigned int sctp_early_fr_msec;

static void
sctp_handle_addr_wq(void)
{
	/* deal with the ADDR wq from the rtsock calls */
	struct sctp_laddr *wi;

	SCTP_IPI_ADDR_LOCK();
	wi = LIST_FIRST(&sctppcbinfo.addr_wq);
	if (wi == NULL) {
		SCTP_IPI_ADDR_UNLOCK();
		return;
	}
	LIST_REMOVE(wi, sctp_nxt_addr);
	if (!LIST_EMPTY(&sctppcbinfo.addr_wq)) {
		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
		    (struct sctp_inpcb *)NULL,
		    (struct sctp_tcb *)NULL,
		    (struct sctp_nets *)NULL);
	}
	SCTP_IPI_ADDR_UNLOCK();
	if (wi->action == RTM_ADD) {
		sctp_add_ip_address(wi->ifa);
	} else if (wi->action == RTM_DELETE) {
		sctp_delete_ip_address(wi->ifa);
	}
	IFAFREE(wi->ifa);
	SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, wi);
	SCTP_DECR_LADDR_COUNT();
}

void
sctp_timeout_handler(void *t)
{
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb;
	struct sctp_nets *net;
	struct sctp_timer *tmr;
	int s, did_output;
	struct sctp_iterator *it = NULL;


	s = splnet();
	tmr = (struct sctp_timer *)t;
	inp = (struct sctp_inpcb *)tmr->ep;
	stcb = (struct sctp_tcb *)tmr->tcb;
	net = (struct sctp_nets *)tmr->net;
	did_output = 1;

#ifdef SCTP_AUDITING_ENABLED
	sctp_audit_log(0xF0, (uint8_t) tmr->type);
	sctp_auditing(3, inp, stcb, net);
#endif

	/* sanity checks... */
	if (tmr->self != (void *)tmr) {
		/*
		 * printf("Stale SCTP timer fired (%p), ignoring...\n",
		 * tmr);
		 */
		splx(s);
		return;
	}
	if (!SCTP_IS_TIMER_TYPE_VALID(tmr->type)) {
		/*
		 * printf("SCTP timer fired with invalid type: 0x%x\n",
		 * tmr->type);
		 */
		splx(s);
		return;
	}
	if ((tmr->type != SCTP_TIMER_TYPE_ADDR_WQ) && (inp == NULL)) {
		splx(s);
		return;
	}
	/* if this is an iterator timeout, get the struct and clear inp */
	if (tmr->type == SCTP_TIMER_TYPE_ITERATOR) {
		it = (struct sctp_iterator *)inp;
		inp = NULL;
	}
	if (inp) {
		SCTP_INP_INCR_REF(inp);
		if ((inp->sctp_socket == 0) &&
		    ((tmr->type != SCTP_TIMER_TYPE_INPKILL) &&
		    (tmr->type != SCTP_TIMER_TYPE_SHUTDOWN) &&
		    (tmr->type != SCTP_TIMER_TYPE_SHUTDOWNACK) &&
		    (tmr->type != SCTP_TIMER_TYPE_SHUTDOWNGUARD) &&
		    (tmr->type != SCTP_TIMER_TYPE_ASOCKILL))
		    ) {
			splx(s);
			SCTP_INP_DECR_REF(inp);
			return;
		}
	}
	if (stcb) {
		if (stcb->asoc.state == 0) {
			splx(s);
			if (inp) {
				SCTP_INP_DECR_REF(inp);
			}
			return;
		}
	}
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
		printf("Timer type %d goes off\n", tmr->type);
	}
#endif				/* SCTP_DEBUG */
	if (!callout_active(&tmr->timer)) {
		splx(s);
		if (inp) {
			SCTP_INP_DECR_REF(inp);
		}
		return;
	}
	if (stcb) {
		atomic_add_int(&stcb->asoc.refcnt, 1);
		SCTP_TCB_LOCK(stcb);
		atomic_add_int(&stcb->asoc.refcnt, -1);
	}
	/* mark as being serviced now */
	callout_deactivate(&tmr->timer);

	/* call the handler for the appropriate timer type */
	switch (tmr->type) {
	case SCTP_TIMER_TYPE_ADDR_WQ:
		sctp_handle_addr_wq();
		break;
	case SCTP_TIMER_TYPE_ITERATOR:
		SCTP_STAT_INCR(sctps_timoiterator);
		sctp_iterator_timer(it);
		break;
	case SCTP_TIMER_TYPE_SEND:
		SCTP_STAT_INCR(sctps_timodata);
		stcb->asoc.num_send_timers_up--;
		if (stcb->asoc.num_send_timers_up < 0) {
			stcb->asoc.num_send_timers_up = 0;
		}
		if (sctp_t3rxt_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_T3);
		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.
			 */
			chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
			sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb,
			    chk->whoTo);
		}
		break;
	case SCTP_TIMER_TYPE_INIT:
		SCTP_STAT_INCR(sctps_timoinit);
		if (sctp_t1init_timer(inp, stcb, net)) {
			/* no need to unlock on tcb its gone */
			goto out_decr;
		}
		/* We do output but not here */
		did_output = 0;
		break;
	case SCTP_TIMER_TYPE_RECV:
		SCTP_STAT_INCR(sctps_timosack);
		sctp_send_sack(stcb);
#ifdef SCTP_AUDITING_ENABLED
		sctp_auditing(4, inp, stcb, net);
#endif
		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SACK_TMR);
		break;
	case SCTP_TIMER_TYPE_SHUTDOWN:
		if (sctp_shutdown_timer(inp, stcb, net)) {
			/* no need to unlock on tcb its gone */
			goto out_decr;
		}
		SCTP_STAT_INCR(sctps_timoshutdown);
#ifdef SCTP_AUDITING_ENABLED
		sctp_auditing(4, inp, stcb, net);
#endif
		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR);
		break;
	case SCTP_TIMER_TYPE_HEARTBEAT:
		{
			struct sctp_nets *net;
			int cnt_of_unconf = 0;

			SCTP_STAT_INCR(sctps_timoheartbeat);
			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
				if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
				    (net->dest_state & SCTP_ADDR_REACHABLE)) {
					cnt_of_unconf++;
				}
			}
			if (cnt_of_unconf == 0) {
				if (sctp_heartbeat_timer(inp, stcb, net, cnt_of_unconf)) {
					/* no need to unlock on tcb its gone */
					goto out_decr;
				}
			}
#ifdef SCTP_AUDITING_ENABLED
			sctp_auditing(4, inp, stcb, net);
#endif
			sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
			    stcb, net);
			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_HB_TMR);
		}
		break;
	case SCTP_TIMER_TYPE_COOKIE:
		if (sctp_cookie_timer(inp, stcb, net)) {
			/* no need to unlock on tcb its gone */
			goto out_decr;
		}
		SCTP_STAT_INCR(sctps_timocookie);
#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);
		break;
	case SCTP_TIMER_TYPE_NEWCOOKIE:
		{
			struct timeval tv;
			int i, secret;

			SCTP_STAT_INCR(sctps_timosecret);
			SCTP_GETTIME_TIMEVAL(&tv);
			SCTP_INP_WLOCK(inp);
			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_INP_WUNLOCK(inp);
			sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, stcb, net);
		}
		did_output = 0;
		break;
	case SCTP_TIMER_TYPE_PATHMTURAISE:
		SCTP_STAT_INCR(sctps_timopathmtu);
		sctp_pathmtu_timer(inp, stcb, net);
		did_output = 0;
		break;
	case SCTP_TIMER_TYPE_SHUTDOWNACK:
		if (sctp_shutdownack_timer(inp, stcb, net)) {
			/* no need to unlock on tcb its gone */
			goto out_decr;
		}
		SCTP_STAT_INCR(sctps_timoshutdownack);
#ifdef SCTP_AUDITING_ENABLED
		sctp_auditing(4, inp, stcb, net);
#endif
		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_ACK_TMR);
		break;
	case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
		SCTP_STAT_INCR(sctps_timoshutdownguard);
		sctp_abort_an_association(inp, stcb,
		    SCTP_SHUTDOWN_GUARD_EXPIRES, NULL);
		/* no need to unlock on tcb its gone */
		goto out_decr;
		break;

	case SCTP_TIMER_TYPE_STRRESET:
		if (sctp_strreset_timer(inp, stcb, net)) {
			/* no need to unlock on tcb its gone */
			goto out_decr;
		}
		SCTP_STAT_INCR(sctps_timostrmrst);
		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_TMR);
		break;
	case SCTP_TIMER_TYPE_EARLYFR:
		/* Need to do FR of things for net */
		SCTP_STAT_INCR(sctps_timoearlyfr);
		sctp_early_fr_timer(inp, stcb, net);
		break;
	case SCTP_TIMER_TYPE_ASCONF:
		if (sctp_asconf_timer(inp, stcb, net)) {
			/* no need to unlock on tcb its gone */
			goto out_decr;
		}
		SCTP_STAT_INCR(sctps_timoasconf);
#ifdef SCTP_AUDITING_ENABLED
		sctp_auditing(4, inp, stcb, net);
#endif
		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_ASCONF_TMR);
		break;

	case SCTP_TIMER_TYPE_AUTOCLOSE:
		SCTP_STAT_INCR(sctps_timoautoclose);
		sctp_autoclose_timer(inp, stcb, net);
		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR);
		did_output = 0;
		break;
	case SCTP_TIMER_TYPE_ASOCKILL:
		SCTP_STAT_INCR(sctps_timoassockill);
		/* Can we free it yet? */
		SCTP_INP_DECR_REF(inp);
		sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
		sctp_free_assoc(inp, stcb, 0);
		/*
		 * free asoc, always unlocks (or destroy's) so prevent
		 * duplicate unlock or unlock of a free mtx :-0
		 */
		stcb = NULL;
		goto out_no_decr;
		break;
	case SCTP_TIMER_TYPE_INPKILL:
		SCTP_STAT_INCR(sctps_timoinpkill);
		/*
		 * special case, take away our increment since WE are the
		 * killer
		 */
		SCTP_INP_DECR_REF(inp);
		sctp_timer_stop(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
		sctp_inpcb_free(inp, 1, 0);
		goto out_no_decr;
		break;
	default:
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
			printf("sctp_timeout_handler:unknown timer %d\n",
			    tmr->type);
		}
#endif				/* SCTP_DEBUG */
		break;
	};
#ifdef SCTP_AUDITING_ENABLED
	sctp_audit_log(0xF1, (uint8_t) tmr->type);
	if (inp)
		sctp_auditing(5, inp, stcb, net);
#endif
	if ((did_output) && stcb) {
		/*
		 * 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);
	}
	if (stcb) {
		SCTP_TCB_UNLOCK(stcb);
	}
out_decr:
	if (inp) {
		SCTP_INP_DECR_REF(inp);
	}
out_no_decr:

#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
		printf("Timer now complete (type %d)\n", tmr->type);
	}
#endif				/* SCTP_DEBUG */
	splx(s);
	if (inp) {
	}
}

int
sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
    struct sctp_nets *net)
{
	int to_ticks;
	struct sctp_timer *tmr;


	if ((t_type != SCTP_TIMER_TYPE_ADDR_WQ) &&
	    (inp == NULL))
		return (EFAULT);

	to_ticks = 0;

	tmr = NULL;
	if (stcb) {
		SCTP_TCB_LOCK_ASSERT(stcb);
	}
	switch (t_type) {
	case SCTP_TIMER_TYPE_ADDR_WQ:
		/* Only 1 tick away :-) */
		tmr = &sctppcbinfo.addr_wq_timer;
		to_ticks = 1;
		break;
	case SCTP_TIMER_TYPE_ITERATOR:
		{
			struct sctp_iterator *it;

			it = (struct sctp_iterator *)inp;
			tmr = &it->tmr;
			to_ticks = SCTP_ITERATOR_TICKS;
		}
		break;
	case SCTP_TIMER_TYPE_SEND:
		/* Here we use the RTO timer */
		{
			int rto_val;

			if ((stcb == NULL) || (net == NULL)) {
				return (EFAULT);
			}
			tmr = &net->rxt_timer;
			if (net->RTO == 0) {
				rto_val = stcb->asoc.initial_rto;
			} else {
				rto_val = net->RTO;
			}
			to_ticks = MSEC_TO_TICKS(rto_val);
		}
		break;
	case SCTP_TIMER_TYPE_INIT:
		/*
		 * Here we use the INIT timer default usually about 1
		 * minute.
		 */
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->rxt_timer;
		if (net->RTO == 0) {
			to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
		} else {
			to_ticks = MSEC_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 (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.dack_timer;
		to_ticks = MSEC_TO_TICKS(stcb->asoc.delayed_ack);
		break;
	case SCTP_TIMER_TYPE_SHUTDOWN:
		/* Here we use the RTO of the destination. */
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		if (net->RTO == 0) {
			to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
		} else {
			to_ticks = MSEC_TO_TICKS(net->RTO);
		}
		tmr = &net->rxt_timer;
		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 (stcb == NULL) {
			return (EFAULT);
		} {
			uint32_t rndval;
			uint8_t this_random;
			int cnt_of_unconf = 0;
			struct sctp_nets *lnet;

			TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
				if ((lnet->dest_state & SCTP_ADDR_UNCONFIRMED) &&
				    (lnet->dest_state & SCTP_ADDR_REACHABLE)) {
					cnt_of_unconf++;
				}
			}
			if (cnt_of_unconf) {
				lnet = NULL;
				sctp_heartbeat_timer(inp, stcb, lnet, cnt_of_unconf);
			}
			if (stcb->asoc.hb_random_idx > 3) {
				rndval = sctp_select_initial_TSN(&inp->sctp_ep);
				memcpy(stcb->asoc.hb_random_values, &rndval,
				    sizeof(stcb->asoc.hb_random_values));
				this_random = stcb->asoc.hb_random_values[0];
				stcb->asoc.hb_random_idx = 0;
				stcb->asoc.hb_ect_randombit = 0;
			} else {
				this_random = stcb->asoc.hb_random_values[stcb->asoc.hb_random_idx];
				stcb->asoc.hb_random_idx++;
				stcb->asoc.hb_ect_randombit = 0;
			}
			/*
			 * this_random will be 0 - 256 ms RTO is in ms.
			 */
			if ((stcb->asoc.hb_is_disabled) &&
			    (cnt_of_unconf == 0)) {
				return (0);
			}
			if (net) {
				struct sctp_nets *lnet;
				int delay;

				delay = stcb->asoc.heart_beat_delay;
				TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
					if ((lnet->dest_state & SCTP_ADDR_UNCONFIRMED) &&
					    ((lnet->dest_state & SCTP_ADDR_OUT_OF_SCOPE) == 0) &&
					    (lnet->dest_state & SCTP_ADDR_REACHABLE)) {
						delay = 0;
					}
				}
				if (net->RTO == 0) {
					/* Never been checked */
					to_ticks = this_random + stcb->asoc.initial_rto + delay;
				} else {
					/* set rto_val to the ms */
					to_ticks = delay + net->RTO + this_random;
				}
			} else {
				if (cnt_of_unconf) {
					to_ticks = this_random + stcb->asoc.initial_rto;
				} else {
					to_ticks = stcb->asoc.heart_beat_delay + this_random + stcb->asoc.initial_rto;
				}
			}
			/*
			 * Now we must convert the to_ticks that are now in
			 * ms to ticks.
			 */
			to_ticks = MSEC_TO_TICKS(to_ticks);
			tmr = &stcb->asoc.hb_timer;
		}
		break;
	case SCTP_TIMER_TYPE_COOKIE:
		/*
		 * Here we can use the RTO timer from the network since one
		 * RTT was compelete. If a retran happened then we will be
		 * using the RTO initial value.
		 */
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		if (net->RTO == 0) {
			to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
		} else {
			to_ticks = MSEC_TO_TICKS(net->RTO);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_NEWCOOKIE:
		/*
		 * nothing needed but the endpoint here ususually about 60
		 * minutes.
		 */
		tmr = &inp->sctp_ep.signature_change;
		to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_SIGNATURE];
		break;
	case SCTP_TIMER_TYPE_ASOCKILL:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.strreset_timer;
		to_ticks = MSEC_TO_TICKS(SCTP_ASOC_KILL_TIMEOUT);
		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.
		 */
		tmr = &inp->sctp_ep.signature_change;
		to_ticks = MSEC_TO_TICKS(SCTP_INP_KILL_TIMEOUT);
		break;
	case SCTP_TIMER_TYPE_PATHMTURAISE:
		/*
		 * Here we use the value found in the EP for PMTU ususually
		 * about 10 minutes.
		 */
		if (stcb == NULL) {
			return (EFAULT);
		}
		if (net == NULL) {
			return (EFAULT);
		}
		to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_PMTU];
		tmr = &net->pmtu_timer;
		break;
	case SCTP_TIMER_TYPE_SHUTDOWNACK:
		/* Here we use the RTO of the destination */
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		if (net->RTO == 0) {
			to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
		} else {
			to_ticks = MSEC_TO_TICKS(net->RTO);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
		/*
		 * Here we use the endpoints shutdown guard timer usually
		 * about 3 minutes.
		 */
		if (stcb == NULL) {
			return (EFAULT);
		}
		to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
		tmr = &stcb->asoc.shut_guard_timer;
		break;
	case SCTP_TIMER_TYPE_STRRESET:
		/*
		 * Here the timer comes from the inp but its value is from
		 * the RTO.
		 */
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		if (net->RTO == 0) {
			to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
		} else {
			to_ticks = MSEC_TO_TICKS(net->RTO);
		}
		tmr = &stcb->asoc.strreset_timer;
		break;

	case SCTP_TIMER_TYPE_EARLYFR:
		{
			unsigned int msec;

			if ((stcb == NULL) || (net == NULL)) {
				return (EFAULT);
			}
			if (net->flight_size > net->cwnd) {
				/* no need to start */
				return (0);
			}
			SCTP_STAT_INCR(sctps_earlyfrstart);
			if (net->lastsa == 0) {
				/* Hmm no rtt estimate yet? */
				msec = stcb->asoc.initial_rto >> 2;
			} else {
				msec = ((net->lastsa >> 2) + net->lastsv) >> 1;
			}
			if (msec < sctp_early_fr_msec) {
				msec = sctp_early_fr_msec;
				if (msec < SCTP_MINFR_MSEC_FLOOR) {
					msec = SCTP_MINFR_MSEC_FLOOR;
				}
			}
			to_ticks = MSEC_TO_TICKS(msec);
			tmr = &net->fr_timer;
		}
		break;
	case SCTP_TIMER_TYPE_ASCONF:
		/*
		 * Here the timer comes from the inp but its value is from
		 * the RTO.
		 */
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		if (net->RTO == 0) {
			to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
		} else {
			to_ticks = MSEC_TO_TICKS(net->RTO);
		}
		tmr = &stcb->asoc.asconf_timer;
		break;
	case SCTP_TIMER_TYPE_AUTOCLOSE:
		if (stcb == NULL) {
			return (EFAULT);
		}
		if (stcb->asoc.sctp_autoclose_ticks == 0) {
			/*
			 * Really an error since stcb is NOT set to
			 * autoclose
			 */
			return (0);
		}
		to_ticks = stcb->asoc.sctp_autoclose_ticks;
		tmr = &stcb->asoc.autoclose_timer;
		break;
	default:
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
			printf("sctp_timer_start:Unknown timer type %d\n",
			    t_type);
		}
#endif				/* SCTP_DEBUG */
		return (EFAULT);
		break;
	};
	if ((to_ticks <= 0) || (tmr == NULL)) {
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
			printf("sctp_timer_start:%d:software error to_ticks:%d tmr:%p not set ??\n",
			    t_type, to_ticks, tmr);
		}
#endif				/* SCTP_DEBUG */
		return (EFAULT);
	}
	if (callout_pending(&tmr->timer)) {
		/*
		 * we do NOT allow you to have it already running. if it is
		 * we leave the current one up unchanged
		 */
		return (EALREADY);
	}
	/* At this point we can proceed */
	if (t_type == SCTP_TIMER_TYPE_SEND) {
		stcb->asoc.num_send_timers_up++;
	}
	tmr->type = t_type;
	tmr->ep = (void *)inp;
	tmr->tcb = (void *)stcb;
	tmr->net = (void *)net;
	tmr->self = (void *)tmr;
	tmr->ticks = ticks;
	callout_reset(&tmr->timer, to_ticks, sctp_timeout_handler, tmr);
	return (0);
}

int
sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
    struct sctp_nets *net)
{
	struct sctp_timer *tmr;

	if ((t_type != SCTP_TIMER_TYPE_ADDR_WQ) &&
	    (inp == NULL))
		return (EFAULT);

	tmr = NULL;
	if (stcb) {
		SCTP_TCB_LOCK_ASSERT(stcb);
	}
	switch (t_type) {
	case SCTP_TIMER_TYPE_ADDR_WQ:
		tmr = &sctppcbinfo.addr_wq_timer;
		break;
	case SCTP_TIMER_TYPE_EARLYFR:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->fr_timer;
		SCTP_STAT_INCR(sctps_earlyfrstop);
		break;
	case SCTP_TIMER_TYPE_ITERATOR:
		{
			struct sctp_iterator *it;

			it = (struct sctp_iterator *)inp;
			tmr = &it->tmr;
		}
		break;
	case SCTP_TIMER_TYPE_SEND:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_INIT:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_RECV:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.dack_timer;
		break;
	case SCTP_TIMER_TYPE_SHUTDOWN:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_HEARTBEAT:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.hb_timer;
		break;
	case SCTP_TIMER_TYPE_COOKIE:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_NEWCOOKIE:
		/* nothing needed but the endpoint here */
		tmr = &inp->sctp_ep.signature_change;
		/*
		 * We re-use the newcookie timer for the INP kill timer. We
		 * must assure that we do not kill it by accident.
		 */
		break;
	case SCTP_TIMER_TYPE_ASOCKILL:
		/*
		 * Stop the asoc kill timer.
		 */
		if (stcb == NULL) {
			return (EFAULT);
		}
		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.
		 */
		tmr = &inp->sctp_ep.signature_change;
		break;
	case SCTP_TIMER_TYPE_PATHMTURAISE:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->pmtu_timer;
		break;
	case SCTP_TIMER_TYPE_SHUTDOWNACK:
		if ((stcb == NULL) || (net == NULL)) {
			return (EFAULT);
		}
		tmr = &net->rxt_timer;
		break;
	case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.shut_guard_timer;
		break;
	case SCTP_TIMER_TYPE_STRRESET:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.strreset_timer;
		break;
	case SCTP_TIMER_TYPE_ASCONF:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.asconf_timer;
		break;
	case SCTP_TIMER_TYPE_AUTOCLOSE:
		if (stcb == NULL) {
			return (EFAULT);
		}
		tmr = &stcb->asoc.autoclose_timer;
		break;
	default:
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_TIMER1) {
			printf("sctp_timer_stop:Unknown timer type %d\n",
			    t_type);
		}
#endif				/* SCTP_DEBUG */
		break;
	};
	if (tmr == NULL) {
		return (EFAULT);
	}
	if ((tmr->type != t_type) && tmr->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.
		 */
		return (0);
	}
	if (t_type == SCTP_TIMER_TYPE_SEND) {
		stcb->asoc.num_send_timers_up--;
		if (stcb->asoc.num_send_timers_up < 0) {
			stcb->asoc.num_send_timers_up = 0;
		}
	}
	tmr->self = NULL;
	callout_stop(&tmr->timer);
	return (0);
}

#ifdef SCTP_USE_ADLER32
static uint32_t
update_adler32(uint32_t adler, uint8_t * buf, int32_t len)
{
	uint32_t s1 = adler & 0xffff;
	uint32_t s2 = (adler >> 16) & 0xffff;
	int n;

	for (n = 0; n < len; n++, buf++) {
		/* s1 = (s1 + buf[n]) % BASE */
		/* first we add */
		s1 = (s1 + *buf);
		/*
		 * now if we need to, we do a mod by subtracting. It seems a
		 * bit faster since I really will only ever do one subtract
		 * at the MOST, since buf[n] is a max of 255.
		 */
		if (s1 >= SCTP_ADLER32_BASE) {
			s1 -= SCTP_ADLER32_BASE;
		}
		/* s2 = (s2 + s1) % BASE */
		/* first we add */
		s2 = (s2 + s1);
		/*
		 * again, it is more efficent (it seems) to subtract since
		 * the most s2 will ever be is (BASE-1 + BASE-1) in the
		 * worse case. This would then be (2 * BASE) - 2, which will
		 * still only do one subtract. On Intel this is much better
		 * to do this way and avoid the divide. Have not -pg'd on
		 * sparc.
		 */
		if (s2 >= SCTP_ADLER32_BASE) {
			s2 -= SCTP_ADLER32_BASE;
		}
	}
	/* Return the adler32 of the bytes buf[0..len-1] */
	return ((s2 << 16) + s1);
}

#endif


uint32_t
sctp_calculate_len(struct mbuf *m)
{
	uint32_t tlen = 0;
	struct mbuf *at;

	at = m;
	while (at) {
		tlen += at->m_len;
		at = at->m_next;
	}
	return (tlen);
}

#if defined(SCTP_WITH_NO_CSUM)

uint32_t
sctp_calculate_sum(struct mbuf *m, int32_t * pktlen, uint32_t offset)
{
	/*
	 * given a mbuf chain with a packetheader offset by 'offset'
	 * pointing at a sctphdr (with csum set to 0) go through the chain
	 * of m_next's and calculate the SCTP checksum. This is currently
	 * Adler32 but will change to CRC32x soon. Also has a side bonus
	 * calculate the total length of the mbuf chain. Note: if offset is
	 * greater than the total mbuf length, checksum=1, pktlen=0 is
	 * returned (ie. no real error code)
	 */
	if (pktlen == NULL)
		return (0);
	*pktlen = sctp_calculate_len(m);
	return (0);
}

#elif defined(SCTP_USE_INCHKSUM)

#include <machine/in_cksum.h>

uint32_t
sctp_calculate_sum(struct mbuf *m, int32_t * pktlen, uint32_t offset)
{
	/*
	 * given a mbuf chain with a packetheader offset by 'offset'
	 * pointing at a sctphdr (with csum set to 0) go through the chain
	 * of m_next's and calculate the SCTP checksum. This is currently
	 * Adler32 but will change to CRC32x soon. Also has a side bonus
	 * calculate the total length of the mbuf chain. Note: if offset is
	 * greater than the total mbuf length, checksum=1, pktlen=0 is
	 * returned (ie. no real error code)
	 */
	int32_t tlen = 0;
	struct mbuf *at;
	uint32_t the_sum, retsum;

	at = m;
	while (at) {
		tlen += at->m_len;
		at = at->m_next;
	}
	the_sum = (uint32_t) (in_cksum_skip(m, tlen, offset));
	if (pktlen != NULL)
		*pktlen = (tlen - offset);
	retsum = htons(the_sum);
	return (the_sum);
}

#else

uint32_t
sctp_calculate_sum(struct mbuf *m, int32_t * pktlen, uint32_t offset)
{
	/*
	 * given a mbuf chain with a packetheader offset by 'offset'
	 * pointing at a sctphdr (with csum set to 0) go through the chain
	 * of m_next's and calculate the SCTP checksum. This is currently
	 * Adler32 but will change to CRC32x soon. Also has a side bonus
	 * calculate the total length of the mbuf chain. Note: if offset is
	 * greater than the total mbuf length, checksum=1, pktlen=0 is
	 * returned (ie. no real error code)
	 */
	int32_t tlen = 0;

#ifdef SCTP_USE_ADLER32
	uint32_t base = 1L;

#else
	uint32_t base = 0xffffffff;

#endif				/* SCTP_USE_ADLER32 */
	struct mbuf *at;

	at = m;
	/* find the correct mbuf and offset into mbuf */
	while ((at != NULL) && (offset > (uint32_t) at->m_len)) {
		offset -= at->m_len;	/* update remaining offset left */
		at = at->m_next;
	}
	while (at != NULL) {
		if ((at->m_len - offset) > 0) {
#ifdef SCTP_USE_ADLER32
			base = update_adler32(base,
			    (unsigned char *)(at->m_data + offset),
			    (unsigned int)(at->m_len - offset));
#else
			if ((at->m_len - offset) < 4) {
				/* Use old method if less than 4 bytes */
				base = old_update_crc32(base,
				    (unsigned char *)(at->m_data + offset),
				    (unsigned int)(at->m_len - offset));
			} else {
				base = update_crc32(base,
				    (unsigned char *)(at->m_data + offset),
				    (unsigned int)(at->m_len - offset));
			}
#endif				/* SCTP_USE_ADLER32 */
			tlen += at->m_len - offset;
			/* we only offset once into the first mbuf */
		}
		if (offset) {
			if (offset < at->m_len)
				offset = 0;
			else
				offset -= at->m_len;
		}
		at = at->m_next;
	}
	if (pktlen != NULL) {
		*pktlen = tlen;
	}
#ifdef SCTP_USE_ADLER32
	/* Adler32 */
	base = htonl(base);
#else
	/* CRC-32c */
	base = sctp_csum_finalize(base);
#endif
	return (base);
}


#endif

void
sctp_mtu_size_reset(struct sctp_inpcb *inp,
    struct sctp_association *asoc, u_long 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 return
 * RTO in number of usecs net should point to the current network
 */
uint32_t
sctp_calculate_rto(struct sctp_tcb *stcb,
    struct sctp_association *asoc,
    struct sctp_nets *net,
    struct timeval *old)
{
	/*
	 * given an association and the starting time of the current RTT
	 * period (in value1/value2) return RTO in number of usecs.
	 */
	int calc_time = 0;
	int o_calctime;
	unsigned int new_rto = 0;
	int first_measure = 0;
	struct timeval now;

	/************************/
	/* 1. calculate new RTT */
	/************************/
	/* get the current time */
	SCTP_GETTIME_TIMEVAL(&now);
	/* compute the RTT value */
	if ((u_long)now.tv_sec > (u_long)old->tv_sec) {
		calc_time = ((u_long)now.tv_sec - (u_long)old->tv_sec) * 1000;
		if ((u_long)now.tv_usec > (u_long)old->tv_usec) {
			calc_time += (((u_long)now.tv_usec -
			    (u_long)old->tv_usec) / 1000);
		} else if ((u_long)now.tv_usec < (u_long)old->tv_usec) {
			/* Borrow 1,000ms from current calculation */
			calc_time -= 1000;
			/* Add in the slop over */
			calc_time += ((int)now.tv_usec / 1000);
			/* Add in the pre-second ms's */
			calc_time += (((int)1000000 - (int)old->tv_usec) / 1000);
		}
	} else if ((u_long)now.tv_sec == (u_long)old->tv_sec) {
		if ((u_long)now.tv_usec > (u_long)old->tv_usec) {
			calc_time = ((u_long)now.tv_usec -
			    (u_long)old->tv_usec) / 1000;
		} else if ((u_long)now.tv_usec < (u_long)old->tv_usec) {
			/* impossible .. garbage in nothing out */
			return (((net->lastsa >> 2) + net->lastsv) >> 1);
		} else {
			/* impossible .. garbage in nothing out */
			return (((net->lastsa >> 2) + net->lastsv) >> 1);
		}
	} else {
		/* Clock wrapped? */
		return (((net->lastsa >> 2) + net->lastsv) >> 1);
	}
	/***************************/
	/* 2. update RTTVAR & SRTT */
	/***************************/
#if 0
	/* if (net->lastsv || net->lastsa) { */
	/* per Section 5.3.1 C3 in SCTP */
	/* net->lastsv = (int) 	 *//* RTTVAR */
	/*
	 * (((double)(1.0 - 0.25) * (double)net->lastsv) + (double)(0.25 *
	 * (double)abs(net->lastsa - calc_time))); net->lastsa = (int)
*//* SRTT */
	/*
	 * (((double)(1.0 - 0.125) * (double)net->lastsa) + (double)(0.125 *
	 * (double)calc_time)); } else {
*//* the first RTT calculation, per C2 Section 5.3.1 */
	/* net->lastsa = calc_time;	 *//* SRTT */
	/* net->lastsv = calc_time / 2;	 *//* RTTVAR */
	/* } */
	/* if RTTVAR goes to 0 you set to clock grainularity */
	/*
	 * if (net->lastsv == 0) { net->lastsv = SCTP_CLOCK_GRANULARITY; }
	 * new_rto = net->lastsa + 4 * net->lastsv;
	 */
#endif
	o_calctime = calc_time;
	/* this is Van Jacobson's integer version */
	if (net->RTO) {
		calc_time -= (net->lastsa >> 3);
		if ((int)net->prev_rtt > o_calctime) {
			net->rtt_variance = net->prev_rtt - o_calctime;
			/* decreasing */
			net->rto_variance_dir = 0;
		} else {
			/* increasing */
			net->rtt_variance = o_calctime - net->prev_rtt;
			net->rto_variance_dir = 1;
		}
#ifdef SCTP_RTTVAR_LOGGING
		rto_logging(net, SCTP_LOG_RTTVAR);
#endif
		net->prev_rtt = o_calctime;
		net->lastsa += calc_time;
		if (calc_time < 0) {
			calc_time = -calc_time;
		}
		calc_time -= (net->lastsv >> 2);
		net->lastsv += calc_time;
		if (net->lastsv == 0) {
			net->lastsv = SCTP_CLOCK_GRANULARITY;
		}
	} else {
		/* First RTO measurment */
		net->lastsa = calc_time;
		net->lastsv = calc_time >> 1;
		first_measure = 1;
		net->rto_variance_dir = 1;
		net->prev_rtt = o_calctime;
		net->rtt_variance = 0;
#ifdef SCTP_RTTVAR_LOGGING
		rto_logging(net, SCTP_LOG_INITIAL_RTT);
#endif
	}
	new_rto = ((net->lastsa >> 2) + net->lastsv) >> 1;
	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;
	}
	/* we are now returning the RTT Smoothed */
	return ((uint32_t) new_rto);
}


/*
 * 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.
 */
__inline 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 < m->m_len)
			break;
		off -= m->m_len;
		m = m->m_next;
	}
	if (m == NULL)
		return (NULL);

	/* is the current mbuf large enough (eg. contiguous)? */
	if ((m->m_len - 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(m->m_len - off, len);
			bcopy(mtod(m, caddr_t)+off, ptr, count);
			len -= count;
			ptr += count;
			off = 0;
			m = m->m_next;
		}
		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));
}


int
sctp_add_pad_tombuf(struct mbuf *m, int padlen)
{
	/*
	 * add padlen bytes of 0 filled padding to the end of the mbuf. If
	 * padlen is > 3 this routine will fail.
	 */
	uint8_t *dp;
	int i;

	if (padlen > 3) {
		return (ENOBUFS);
	}
	if (M_TRAILINGSPACE(m)) {
		/*
		 * The easy way. We hope the majority of the time we hit
		 * here :)
		 */
		dp = (uint8_t *) (mtod(m, caddr_t)+m->m_len);
		m->m_len += padlen;
	} else {
		/* Hard way we must grow the mbuf */
		struct mbuf *tmp;

		tmp = sctp_get_mbuf_for_msg(padlen, 0, M_DONTWAIT, 1, MT_DATA);
		if (tmp == NULL) {
			/* Out of space GAK! we are in big trouble. */
			return (ENOSPC);
		}
		/* setup and insert in middle */
		tmp->m_next = m->m_next;
		tmp->m_len = padlen;
		m->m_next = tmp;
		dp = mtod(tmp, uint8_t *);
	}
	/* zero out the pad */
	for (i = 0; i < padlen; i++) {
		*dp = 0;
		dp++;
	}
	return (0);
}

int
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;

	m_at = m;
	if (last_mbuf) {
		return (sctp_add_pad_tombuf(last_mbuf, padval));
	} else {
		while (m_at) {
			if (m_at->m_next == NULL) {
				return (sctp_add_pad_tombuf(m_at, padval));
			}
			m_at = m_at->m_next;
		}
	}
	return (EFAULT);
}

int sctp_asoc_change_wake = 0;

static void
sctp_notify_assoc_change(uint32_t event, struct sctp_tcb *stcb,
    uint32_t error, void *data)
{
	struct mbuf *m_notify;
	struct sctp_assoc_change *sac;
	struct sctp_queued_to_read *control;

	/*
	 * First if we are are going down dump everything we can to the
	 * socket rcv queue.
	 */

	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)
	    ) {
		/* If the socket is gone we are out of here */
		return;
	}
	/*
	 * For TCP model AND UDP connected sockets we will send an error up
	 * when an ABORT comes in.
	 */
	if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
	    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
	    (event == SCTP_COMM_LOST)) {
		if (TAILQ_EMPTY(&stcb->sctp_ep->read_queue)) {
			stcb->sctp_socket->so_error = ECONNRESET;
		}
		/* Wake ANY sleepers */
		sorwakeup(stcb->sctp_socket);
		sowwakeup(stcb->sctp_socket);
		sctp_asoc_change_wake++;
	}
	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_RECVASSOCEVNT)) {
		/* event not enabled */
		return;
	}
	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_assoc_change), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 0;

	sac = mtod(m_notify, struct sctp_assoc_change *);
	sac->sac_type = SCTP_ASSOC_CHANGE;
	sac->sac_flags = 0;
	sac->sac_length = sizeof(struct sctp_assoc_change);
	sac->sac_state = event;
	sac->sac_error = error;
	/* XXX verify these stream counts */
	sac->sac_outbound_streams = stcb->asoc.streamoutcnt;
	sac->sac_inbound_streams = stcb->asoc.streamincnt;
	sac->sac_assoc_id = sctp_get_associd(stcb);
	m_notify->m_flags |= M_EOR | M_NOTIFICATION;
	m_notify->m_pkthdr.len = sizeof(struct sctp_assoc_change);
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_assoc_change);
	m_notify->m_next = NULL;
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	control->length = m_notify->m_len;
	/* 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);
	if (event == SCTP_COMM_LOST) {
		/* Wake up any sleeper */
		sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket);
	}
}

static void
sctp_notify_peer_addr_change(struct sctp_tcb *stcb, uint32_t state,
    struct sockaddr *sa, uint32_t error)
{
	struct mbuf *m_notify;
	struct sctp_paddr_change *spc;
	struct sctp_queued_to_read *control;

	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_RECVPADDREVNT))
		/* event not enabled */
		return;

	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		return;
	m_notify->m_len = 0;
	spc = mtod(m_notify, struct sctp_paddr_change *);
	spc->spc_type = SCTP_PEER_ADDR_CHANGE;
	spc->spc_flags = 0;
	spc->spc_length = sizeof(struct sctp_paddr_change);
	if (sa->sa_family == AF_INET) {
		memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
	} else {
		memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in6));
	}
	spc->spc_state = state;
	spc->spc_error = error;
	spc->spc_assoc_id = sctp_get_associd(stcb);

	m_notify->m_flags |= M_EOR | M_NOTIFICATION;
	m_notify->m_pkthdr.len = sizeof(struct sctp_paddr_change);
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_paddr_change);
	m_notify->m_next = NULL;

	/* append to socket */
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	control->length = m_notify->m_len;
	/* 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);
}


static void
sctp_notify_send_failed(struct sctp_tcb *stcb, uint32_t error,
    struct sctp_tmit_chunk *chk)
{
	struct mbuf *m_notify;
	struct sctp_send_failed *ssf;
	struct sctp_queued_to_read *control;
	int length;

	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_RECVSENDFAILEVNT))
		/* event not enabled */
		return;

	length = sizeof(struct sctp_send_failed) + chk->send_size;
	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_send_failed), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 0;
	ssf = mtod(m_notify, struct sctp_send_failed *);
	ssf->ssf_type = SCTP_SEND_FAILED;
	if (error == SCTP_NOTIFY_DATAGRAM_UNSENT)
		ssf->ssf_flags = SCTP_DATA_UNSENT;
	else
		ssf->ssf_flags = SCTP_DATA_SENT;
	ssf->ssf_length = length;
	ssf->ssf_error = error;
	/* not exactly what the user sent in, but should be close :) */
	ssf->ssf_info.sinfo_stream = chk->rec.data.stream_number;
	ssf->ssf_info.sinfo_ssn = chk->rec.data.stream_seq;
	ssf->ssf_info.sinfo_flags = chk->rec.data.rcv_flags;
	ssf->ssf_info.sinfo_ppid = chk->rec.data.payloadtype;
	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);
	m_notify->m_next = chk->data;
	m_notify->m_flags |= M_NOTIFICATION;
	m_notify->m_pkthdr.len = length;
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_send_failed);

	/* 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) < m_notify->m_len) {
		sctp_m_freem(m_notify);
		return;
	}
	/* append to socket */
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	sctp_add_to_readq(stcb->sctp_ep, stcb,
	    control,
	    &stcb->sctp_socket->so_rcv, 1);
}


static void
sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error,
    struct sctp_stream_queue_pending *sp)
{
	struct mbuf *m_notify;
	struct sctp_send_failed *ssf;
	struct sctp_queued_to_read *control;
	int length;

	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_RECVSENDFAILEVNT))
		/* event not enabled */
		return;

	length = sizeof(struct sctp_send_failed) + sp->length;
	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 0;
	ssf = mtod(m_notify, struct sctp_send_failed *);
	ssf->ssf_type = SCTP_SEND_FAILED;
	if (error == SCTP_NOTIFY_DATAGRAM_UNSENT)
		ssf->ssf_flags = SCTP_DATA_UNSENT;
	else
		ssf->ssf_flags = SCTP_DATA_SENT;
	ssf->ssf_length = length;
	ssf->ssf_error = error;
	/* not exactly what the user sent in, but should be close :) */
	ssf->ssf_info.sinfo_stream = sp->stream;
	ssf->ssf_info.sinfo_ssn = sp->strseq;
	ssf->ssf_info.sinfo_flags = sp->sinfo_flags;
	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);
	m_notify->m_next = sp->data;
	m_notify->m_flags |= M_NOTIFICATION;
	m_notify->m_pkthdr.len = length;
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_send_failed);

	/* 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) < m_notify->m_len) {
		sctp_m_freem(m_notify);
		return;
	}
	/* append to socket */
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	sctp_add_to_readq(stcb->sctp_ep, stcb,
	    control,
	    &stcb->sctp_socket->so_rcv, 1);
}



static void
sctp_notify_adaptation_layer(struct sctp_tcb *stcb,
    uint32_t error)
{
	struct mbuf *m_notify;
	struct sctp_adaptation_event *sai;
	struct sctp_queued_to_read *control;

	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_ADAPTATIONEVNT))
		/* event not enabled */
		return;

	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 0;
	sai = mtod(m_notify, 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 = error;
	sai->sai_assoc_id = sctp_get_associd(stcb);

	m_notify->m_flags |= M_EOR | M_NOTIFICATION;
	m_notify->m_pkthdr.len = sizeof(struct sctp_adaptation_event);
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_adaptation_event);
	m_notify->m_next = NULL;

	/* append to socket */
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	control->length = m_notify->m_len;
	/* 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);
}

/* This always must be called with the read-queue LOCKED in the INP */
void
sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb,
    uint32_t error, int nolock)
{
	struct mbuf *m_notify;
	struct sctp_pdapi_event *pdapi;
	struct sctp_queued_to_read *control;
	struct sockbuf *sb;

	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_PDAPIEVNT))
		/* event not enabled */
		return;

	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_pdapi_event), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 0;
	pdapi = mtod(m_notify, 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_assoc_id = sctp_get_associd(stcb);

	m_notify->m_flags |= M_EOR | M_NOTIFICATION;
	m_notify->m_pkthdr.len = sizeof(struct sctp_pdapi_event);
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_pdapi_event);
	m_notify->m_next = NULL;
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	control->length = m_notify->m_len;
	/* not that we need this */
	control->tail_mbuf = m_notify;
	control->held_length = 0;
	control->length = 0;
	if (nolock == 0) {
		SCTP_INP_READ_LOCK(stcb->sctp_ep);
	}
	sb = &stcb->sctp_socket->so_rcv;
#ifdef SCTP_SB_LOGGING
	sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, m_notify->m_len);
#endif
	sctp_sballoc(stcb, sb, m_notify);
#ifdef SCTP_SB_LOGGING
	sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
	atomic_add_int(&control->length, m_notify->m_len);
	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 (nolock == 0) {
		SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
	}
	if (stcb->sctp_ep && stcb->sctp_socket) {
		/* This should always be the case */
		sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
	}
}

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! */
		socantsendmore(stcb->sctp_socket);
	}
	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT))
		/* event not enabled */
		return;

	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_event), 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 0;
	sse = mtod(m_notify, 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);

	m_notify->m_flags |= M_EOR | M_NOTIFICATION;
	m_notify->m_pkthdr.len = sizeof(struct sctp_shutdown_event);
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = sizeof(struct sctp_shutdown_event);
	m_notify->m_next = NULL;

	/* append to socket */
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	control->length = m_notify->m_len;
	/* 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);
}

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 (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_STREAM_RESETEVNT))
		/* event not enabled */
		return;

	m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
	if (m_notify == NULL)
		/* no space left */
		return;
	m_notify->m_len = 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 *);
	strreset->strreset_type = SCTP_STREAM_RESET_EVENT;
	if (number_entries == 0) {
		strreset->strreset_flags = flag | SCTP_STRRESET_ALL_STREAMS;
	} else {
		strreset->strreset_flags = flag | SCTP_STRRESET_STREAM_LIST;
	}
	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_list[i] = ntohs(list[i]);
		}
	}
	m_notify->m_flags |= M_EOR | M_NOTIFICATION;
	m_notify->m_pkthdr.len = len;
	m_notify->m_pkthdr.rcvif = 0;
	m_notify->m_len = len;
	m_notify->m_next = NULL;
	if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < m_notify->m_len) {
		/* no space */
		sctp_m_freem(m_notify);
		return;
	}
	/* append to socket */
	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
	    0, 0, 0, 0, 0, 0,
	    m_notify);
	if (control == NULL) {
		/* no memory */
		sctp_m_freem(m_notify);
		return;
	}
	control->length = m_notify->m_len;
	/* 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);
}


void
sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb,
    uint32_t error, void *data)
{
	if (stcb == NULL) {
		/* unlikely but */
		return;
	}
	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)
	    ) {
		/* No notifications up when we are in a no socket state */
		return;
	}
	if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
		/* Can't send up to a closed socket any notifications */
		return;
	}
	if (stcb && (stcb->asoc.assoc_up_sent == 0) && (notification != SCTP_NOTIFY_ASSOC_UP)) {
		if ((notification != SCTP_NOTIFY_ASSOC_DOWN) &&
		    (notification != SCTP_NOTIFY_ASSOC_ABORTED) &&
		    (notification != SCTP_NOTIFY_SPECIAL_SP_FAIL) &&
		    (notification != SCTP_NOTIFY_DG_FAIL) &&
		    (notification != SCTP_NOTIFY_PEER_SHUTDOWN)) {
			sctp_notify_assoc_change(SCTP_COMM_UP, stcb, 0, NULL);
			stcb->asoc.assoc_up_sent = 1;
		}
	}
	switch (notification) {
	case SCTP_NOTIFY_ASSOC_UP:
		if (stcb->asoc.assoc_up_sent == 0) {
			sctp_notify_assoc_change(SCTP_COMM_UP, stcb, error, NULL);
			stcb->asoc.assoc_up_sent = 1;
		}
		break;
	case SCTP_NOTIFY_ASSOC_DOWN:
		sctp_notify_assoc_change(SCTP_SHUTDOWN_COMP, stcb, error, NULL);
		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);
			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);
			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);
			break;
		}
	case SCTP_NOTIFY_SPECIAL_SP_FAIL:
		sctp_notify_send_failed2(stcb, error,
		    (struct sctp_stream_queue_pending *)data);
		break;
	case SCTP_NOTIFY_DG_FAIL:
		sctp_notify_send_failed(stcb, error,
		    (struct sctp_tmit_chunk *)data);
		break;
	case SCTP_NOTIFY_ADAPTATION_INDICATION:
		/* Here the error is the adaptation indication */
		sctp_notify_adaptation_layer(stcb, error);
		break;
	case SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION:
		sctp_notify_partial_delivery_indication(stcb, error, 0);
		break;
	case SCTP_NOTIFY_STRDATA_ERR:
		break;
	case SCTP_NOTIFY_ASSOC_ABORTED:
		sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, NULL);
		break;
	case SCTP_NOTIFY_PEER_OPENED_STREAM:
		break;
	case SCTP_NOTIFY_STREAM_OPENED_OK:
		break;
	case SCTP_NOTIFY_ASSOC_RESTART:
		sctp_notify_assoc_change(SCTP_RESTART, stcb, error, data);
		break;
	case SCTP_NOTIFY_HB_RESP:
		break;
	case SCTP_NOTIFY_STR_RESET_SEND:
		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STRRESET_OUTBOUND_STR);
		break;
	case SCTP_NOTIFY_STR_RESET_RECV:
		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STRRESET_INBOUND_STR);
		break;
	case SCTP_NOTIFY_STR_RESET_FAILED_OUT:
		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), (SCTP_STRRESET_OUTBOUND_STR | SCTP_STRRESET_INBOUND_STR));
		break;

	case SCTP_NOTIFY_STR_RESET_FAILED_IN:
		sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), (SCTP_STRRESET_INBOUND_STR | SCTP_STRRESET_INBOUND_STR));
		break;

	case SCTP_NOTIFY_ASCONF_ADD_IP:
		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_ADDED, data,
		    error);
		break;
	case SCTP_NOTIFY_ASCONF_DELETE_IP:
		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_REMOVED, data,
		    error);
		break;
	case SCTP_NOTIFY_ASCONF_SET_PRIMARY:
		sctp_notify_peer_addr_change(stcb, SCTP_ADDR_MADE_PRIM, data,
		    error);
		break;
	case SCTP_NOTIFY_ASCONF_SUCCESS:
		break;
	case SCTP_NOTIFY_ASCONF_FAILED:
		break;
	case SCTP_NOTIFY_PEER_SHUTDOWN:
		sctp_notify_shutdown_event(stcb);
		break;
	case SCTP_NOTIFY_AUTH_NEW_KEY:
		sctp_notify_authentication(stcb, SCTP_AUTH_NEWKEY, error,
		    (uint16_t) (uintptr_t) data);
		break;
#if 0
	case SCTP_NOTIFY_AUTH_KEY_CONFLICT:
		sctp_notify_authentication(stcb, SCTP_AUTH_KEY_CONFLICT,
		    error, (uint16_t) (uintptr_t) data);
		break;
#endif				/* not yet? remove? */


	default:
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_UTIL1) {
			printf("NOTIFY: unknown notification %xh (%u)\n",
			    notification, notification);
		}
#endif				/* SCTP_DEBUG */
		break;
	}			/* end switch */
}

void
sctp_report_all_outbound(struct sctp_tcb *stcb)
{
	struct sctp_association *asoc;
	struct sctp_stream_out *outs;
	struct sctp_tmit_chunk *chk;
	struct sctp_stream_queue_pending *sp;

	asoc = &stcb->asoc;

	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;
	}
	/* now through all the gunk freeing chunks */

	TAILQ_FOREACH(outs, &asoc->out_wheel, next_spoke) {
		/* now clean up any chunks here */
		stcb->asoc.locked_on_sending = NULL;
		sp = TAILQ_FIRST(&outs->outqueue);
		while (sp) {
			stcb->asoc.stream_queue_cnt--;
			TAILQ_REMOVE(&outs->outqueue, sp, next);
			sctp_free_spbufspace(stcb, asoc, sp);
			sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
			    SCTP_NOTIFY_DATAGRAM_UNSENT, (void *)sp);
			if (sp->data) {
				sctp_m_freem(sp->data);
				sp->data = NULL;
			}
			if (sp->net)
				sctp_free_remote_addr(sp->net);
			sp->net = NULL;
			/* Free the chunk */
			sctp_free_a_strmoq(stcb, sp);
			sp = TAILQ_FIRST(&outs->outqueue);
		}
	}

	/* pending send queue SHOULD be empty */
	if (!TAILQ_EMPTY(&asoc->send_queue)) {
		chk = TAILQ_FIRST(&asoc->send_queue);
		while (chk) {
			TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
			if (chk->data) {
				/*
				 * trim off the sctp chunk header(it should
				 * be there)
				 */
				if (chk->send_size >= sizeof(struct sctp_data_chunk)) {
					m_adj(chk->data, sizeof(struct sctp_data_chunk));
					sctp_mbuf_crush(chk->data);
				}
			}
			sctp_free_bufspace(stcb, asoc, chk, 1);
			sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, SCTP_NOTIFY_DATAGRAM_UNSENT, chk);
			if (chk->data) {
				sctp_m_freem(chk->data);
				chk->data = NULL;
			}
			if (chk->whoTo)
				sctp_free_remote_addr(chk->whoTo);
			chk->whoTo = NULL;
			sctp_free_a_chunk(stcb, chk);
			chk = TAILQ_FIRST(&asoc->send_queue);
		}
	}
	/* sent queue SHOULD be empty */
	if (!TAILQ_EMPTY(&asoc->sent_queue)) {
		chk = TAILQ_FIRST(&asoc->sent_queue);
		while (chk) {
			TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
			if (chk->data) {
				/*
				 * trim off the sctp chunk header(it should
				 * be there)
				 */
				if (chk->send_size >= sizeof(struct sctp_data_chunk)) {
					m_adj(chk->data, sizeof(struct sctp_data_chunk));
					sctp_mbuf_crush(chk->data);
				}
			}
			sctp_free_bufspace(stcb, asoc, chk, 1);
			sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
			    SCTP_NOTIFY_DATAGRAM_SENT, chk);
			if (chk->data) {
				sctp_m_freem(chk->data);
				chk->data = NULL;
			}
			if (chk->whoTo)
				sctp_free_remote_addr(chk->whoTo);
			chk->whoTo = NULL;
			sctp_free_a_chunk(stcb, chk);
			chk = TAILQ_FIRST(&asoc->sent_queue);
		}
	}
}

void
sctp_abort_notification(struct sctp_tcb *stcb, int error)
{

	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;
	}
	/* Tell them we lost the asoc */
	sctp_report_all_outbound(stcb);
	if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
	    ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
	    (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
		stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_WAS_ABORTED;
	}
	sctp_ulp_notify(SCTP_NOTIFY_ASSOC_ABORTED, stcb, error, NULL);
}

void
sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
    struct mbuf *m, int iphlen, struct sctphdr *sh, struct mbuf *op_err)
{
	uint32_t vtag;

	vtag = 0;
	if (stcb != NULL) {
		/* We have a TCB to abort, send notification too */
		vtag = stcb->asoc.peer_vtag;
		sctp_abort_notification(stcb, 0);
	}
	sctp_send_abort(m, iphlen, sh, vtag, op_err);
	if (stcb != NULL) {
		/* Ok, now lets free it */
		sctp_free_assoc(inp, stcb, 0);
	} else {
		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
			if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
				sctp_inpcb_free(inp, 1, 0);
			}
		}
	}
}

void
sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
    int error, struct mbuf *op_err)
{
	uint32_t vtag;

	if (stcb == NULL) {
		/* Got to have a TCB */
		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
			if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
				sctp_inpcb_free(inp, 1, 0);
			}
		}
		return;
	}
	vtag = stcb->asoc.peer_vtag;
	/* notify the ulp */
	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0)
		sctp_abort_notification(stcb, error);
	/* notify the peer */
	sctp_send_abort_tcb(stcb, op_err);
	SCTP_STAT_INCR_COUNTER32(sctps_aborted);
	if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
	    (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
		SCTP_STAT_DECR_GAUGE32(sctps_currestab);
	}
	/* now free the asoc */
	sctp_free_assoc(inp, stcb, 0);
}

void
sctp_handle_ootb(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh,
    struct sctp_inpcb *inp, struct mbuf *op_err)
{
	struct sctp_chunkhdr *ch, chunk_buf;
	unsigned int chk_length;

	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_FIRST(&inp->sctp_asoc_list) == NULL) {
			sctp_inpcb_free(inp, 1, 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_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(m, iphlen, sh);
			return;
		default:
			break;
		}
		offset += SCTP_SIZE32(chk_length);
		ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
		    sizeof(*ch), (uint8_t *) & chunk_buf);
	}
	sctp_send_abort(m, iphlen, sh, 0, op_err);
}

/*
 * 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 * vtagfill)
{
	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) {
			/* need to update the Vtag */
			init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
			    offset, sizeof(*init_chk), (uint8_t *) & chunk_buf);
			if (init_chk != NULL) {
				*vtagfill = 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
 */
uint32_t
sctp_is_same_scope(struct sockaddr_in6 *addr1, struct sockaddr_in6 *addr2)
{
	struct sockaddr_in6 a, b;

	/* save copies */
	a = *addr1;
	b = *addr2;

	if (a.sin6_scope_id == 0)
		if (sa6_recoverscope(&a)) {
			/* can't get scope, so can't match */
			return (0);
		}
	if (b.sin6_scope_id == 0)
		if (sa6_recoverscope(&b)) {
			/* can't get scope, so can't match */
			return (0);
		}
	if (a.sin6_scope_id != b.sin6_scope_id)
		return (0);

	return (1);
}

/*
 * 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;
				if (!sa6_recoverscope(store)) {
					/* use the recovered scope */
					addr = store;
				}
				/* else, return the original "to" addr */
			}
		}
	}
	return (addr);
}

/*
 * are the two addresses the same?  currently a "scopeless" check returns: 1
 * if same, 0 if not
 */
__inline 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);

	if (sa1->sa_family == 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_addr,
		    &sin6_2->sin6_addr));
	} else if (sa1->sa_family == 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);
	} else {
		/* we don't do these... */
		return (0);
	}
}

void
sctp_print_address(struct sockaddr *sa)
{

	if (sa->sa_family == AF_INET6) {
		struct sockaddr_in6 *sin6;

		sin6 = (struct sockaddr_in6 *)sa;
		printf("IPv6 address: %s:%d scope:%u\n",
		    ip6_sprintf(&sin6->sin6_addr), ntohs(sin6->sin6_port),
		    sin6->sin6_scope_id);
	} else if (sa->sa_family == AF_INET) {
		struct sockaddr_in *sin;
		unsigned char *p;

		sin = (struct sockaddr_in *)sa;
		p = (unsigned char *)&sin->sin_addr;
		printf("IPv4 address: %u.%u.%u.%u:%d\n",
		    p[0], p[1], p[2], p[3], ntohs(sin->sin_port));
	} else {
		printf("?\n");
	}
}

void
sctp_print_address_pkt(struct ip *iph, struct sctphdr *sh)
{
	if (iph->ip_v == IPVERSION) {
		struct sockaddr_in lsa, fsa;

		bzero(&lsa, sizeof(lsa));
		lsa.sin_len = sizeof(lsa);
		lsa.sin_family = AF_INET;
		lsa.sin_addr = iph->ip_src;
		lsa.sin_port = sh->src_port;
		bzero(&fsa, sizeof(fsa));
		fsa.sin_len = sizeof(fsa);
		fsa.sin_family = AF_INET;
		fsa.sin_addr = iph->ip_dst;
		fsa.sin_port = sh->dest_port;
		printf("src: ");
		sctp_print_address((struct sockaddr *)&lsa);
		printf("dest: ");
		sctp_print_address((struct sockaddr *)&fsa);
	} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
		struct ip6_hdr *ip6;
		struct sockaddr_in6 lsa6, fsa6;

		ip6 = (struct ip6_hdr *)iph;
		bzero(&lsa6, sizeof(lsa6));
		lsa6.sin6_len = sizeof(lsa6);
		lsa6.sin6_family = AF_INET6;
		lsa6.sin6_addr = ip6->ip6_src;
		lsa6.sin6_port = sh->src_port;
		bzero(&fsa6, sizeof(fsa6));
		fsa6.sin6_len = sizeof(fsa6);
		fsa6.sin6_family = AF_INET6;
		fsa6.sin6_addr = ip6->ip6_dst;
		fsa6.sin6_port = sh->dest_port;
		printf("src: ");
		sctp_print_address((struct sockaddr *)&lsa6);
		printf("dest: ");
		sctp_print_address((struct sockaddr *)&fsa6);
	}
}

#if defined(HAVE_SCTP_SO_LASTRECORD)

/* cloned from uipc_socket.c */

#define SCTP_SBLINKRECORD(sb, m0) do {					\
	if ((sb)->sb_lastrecord != NULL)				\
		(sb)->sb_lastrecord->m_nextpkt = (m0);			\
	else								\
		(sb)->sb_mb = (m0);					\
	(sb)->sb_lastrecord = (m0);					\
} while (/*CONSTCOND*/0)
#endif

void
sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
    struct sctp_inpcb *new_inp,
    struct sctp_tcb *stcb)
{
	/*
	 * 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;
	int error;

	old_so = old_inp->sctp_socket;
	new_so = new_inp->sctp_socket;
	TAILQ_INIT(&tmp_queue);

	SOCKBUF_LOCK(&(old_so->so_rcv));

	error = sblock(&old_so->so_rcv, 0);

	SOCKBUF_UNLOCK(&(old_so->so_rcv));
	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;
	}
	/* lock the socket buffers */
	SCTP_INP_READ_LOCK(old_inp);
	control = TAILQ_FIRST(&old_inp->read_queue);
	/* Pull off all for out target stcb */
	while (control) {
		nctl = TAILQ_NEXT(control, next);
		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) {
#ifdef SCTP_SB_LOGGING
				sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, m->m_len);
#endif
				sctp_sbfree(control, stcb, &old_so->so_rcv, m);
#ifdef SCTP_SB_LOGGING
				sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
				m = m->m_next;
			}
		}
		control = nctl;
	}
	SCTP_INP_READ_UNLOCK(old_inp);

	/* Remove the sb-lock on the old socket */
	SOCKBUF_LOCK(&(old_so->so_rcv));

	sbunlock(&old_so->so_rcv);
	SOCKBUF_UNLOCK(&(old_so->so_rcv));

	/* Now we move them over to the new socket buffer */
	control = TAILQ_FIRST(&tmp_queue);
	SCTP_INP_READ_LOCK(new_inp);
	while (control) {
		nctl = TAILQ_NEXT(control, next);
		TAILQ_INSERT_TAIL(&new_inp->read_queue, control, next);
		m = control->data;
		while (m) {
#ifdef SCTP_SB_LOGGING
			sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, m->m_len);
#endif
			sctp_sballoc(stcb, &new_so->so_rcv, m);
#ifdef SCTP_SB_LOGGING
			sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
			m = m->m_next;
		}
		control = nctl;
	}
	SCTP_INP_READ_UNLOCK(new_inp);
}


void
sctp_add_to_readq(struct sctp_inpcb *inp,
    struct sctp_tcb *stcb,
    struct sctp_queued_to_read *control,
    struct sockbuf *sb,
    int end)
{
	/*
	 * 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 INVARIENTS
		panic("Gak, inp NULL on add_to_readq");
#endif
		return;
	}
	SCTP_INP_READ_LOCK(inp);
	m = control->data;
	control->held_length = 0;
	control->length = 0;
	while (m) {
		if (m->m_len == 0) {
			/* Skip mbufs with NO length */
			if (prev == NULL) {
				/* First one */
				control->data = sctp_m_free(m);
				m = control->data;
			} else {
				prev->m_next = sctp_m_free(m);
				m = prev->m_next;
			}
			if (m == NULL) {
				control->tail_mbuf = prev;;
			}
			continue;
		}
		prev = m;
#ifdef SCTP_SB_LOGGING
		sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, m->m_len);
#endif
		sctp_sballoc(stcb, sb, m);
#ifdef SCTP_SB_LOGGING
		sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
		atomic_add_int(&control->length, m->m_len);
		m = m->m_next;
	}
	if (prev != NULL) {
		control->tail_mbuf = prev;
		if (end) {
			prev->m_flags |= M_EOR;
		}
	} else {
		return;
	}
	if (end) {
		control->end_added = 1;
	}
	TAILQ_INSERT_TAIL(&inp->read_queue, control, next);
	SCTP_INP_READ_UNLOCK(inp);
	if (inp && inp->sctp_socket) {
		sctp_sorwakeup(inp, inp->sctp_socket);
	}
}


int
sctp_append_to_readq(struct sctp_inpcb *inp,
    struct sctp_tcb *stcb,
    struct sctp_queued_to_read *control,
    struct mbuf *m,
    int end,
    int ctls_cumack,
    struct sockbuf *sb)
{
	/*
	 * A partial delivery API event is underway. OR we are appending on
	 * the reassembly queue.
	 *
	 * If PDAPI this means we need to add m to the end of the data.
	 * Increase the length in the control AND increment the sb_cc.
	 * Otherwise sb is NULL and all we need to do is put it at the end
	 * of the mbuf chain.
	 */
	int len = 0;
	struct mbuf *mm, *tail = NULL, *prev = NULL;

	if (inp) {
		SCTP_INP_READ_LOCK(inp);
	}
	if (control == NULL) {
get_out:
		if (inp) {
			SCTP_INP_READ_UNLOCK(inp);
		}
		return (-1);
	}
	if ((control->tail_mbuf) &&
	    (control->tail_mbuf->m_flags & M_EOR)) {
		/* huh this one is complete? */
		goto get_out;
	}
	mm = m;
	if (mm == NULL) {
		goto get_out;
	}
	while (mm) {
		if (mm->m_len == 0) {
			/* Skip mbufs with NO lenght */
			if (prev == NULL) {
				/* First one */
				m = sctp_m_free(mm);
				mm = m;
			} else {
				prev->m_next = sctp_m_free(mm);
				mm = prev->m_next;
			}
			continue;
		}
		prev = mm;
		len += mm->m_len;
		if (sb) {
#ifdef SCTP_SB_LOGGING
			sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, mm->m_len);
#endif
			sctp_sballoc(stcb, sb, mm);
#ifdef SCTP_SB_LOGGING
			sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
		}
		mm = mm->m_next;
	}
	if (prev) {
		tail = prev;
	} else {
		/* Really there should always be a prev */
		if (m == NULL) {
			/* Huh nothing left? */
#ifdef INVARIENTS
			panic("Nothing left to add?");
#else
			goto get_out;
#endif
		}
		tail = m;
	}
	if (end) {
		/* message is complete */
		tail->m_flags |= M_EOR;
		if (control == stcb->asoc.control_pdapi) {
			stcb->asoc.control_pdapi = NULL;
		}
		control->held_length = 0;
		control->end_added = 1;
	}
	atomic_add_int(&control->length, len);
	if (control->tail_mbuf) {
		/* append */
		control->tail_mbuf->m_next = m;
		control->tail_mbuf = tail;
	} else {
		/* nothing there */
#ifdef INVARIENTS
		if (control->data != NULL) {
			panic("This should NOT happen");
		}
#endif
		control->data = m;
		control->tail_mbuf = tail;
	}
	/*
	 * When we are appending in partial delivery, the cum-ack is used
	 * for the actual pd-api highest tsn on this mbuf. The true cum-ack
	 * is populated in the outbound sinfo structure from the true cumack
	 * if the association exists...
	 */
	control->sinfo_tsn = control->sinfo_cumtsn = ctls_cumack;
	if (inp) {
		SCTP_INP_READ_UNLOCK(inp);
	}
	if (inp && inp->sctp_socket) {
		sctp_sorwakeup(inp, inp->sctp_socket);
	}
	return (0);
}



/*************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_invmanparam(int err)
{
	/* Return a MBUF with a invalid mandatory parameter */
	struct mbuf *m;

	m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_DONTWAIT, 1, MT_DATA);
	if (m) {
		struct sctp_paramhdr *ph;

		m->m_len = sizeof(struct sctp_paramhdr);
		ph = mtod(m, struct sctp_paramhdr *);
		ph->param_length = htons(sizeof(struct sctp_paramhdr));
		ph->param_type = htons(err);
	}
	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;
	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) {
		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,
    int reason, struct sctpchunk_listhead *queue)
{
	int ret_sz = 0;
	int notdone;
	uint8_t foundeom = 0;

	do {
		ret_sz += tp1->book_size;
		tp1->sent = SCTP_FORWARD_TSN_SKIP;
		if (tp1->data) {
			sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
			sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, reason, tp1);
			sctp_m_freem(tp1->data);
			tp1->data = NULL;
			sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket);
		}
		if (PR_SCTP_BUF_ENABLED(tp1->flags)) {
			stcb->asoc.sent_queue_cnt_removeable--;
		}
		if (queue == &stcb->asoc.send_queue) {
			TAILQ_REMOVE(&stcb->asoc.send_queue, tp1, sctp_next);
			/* on to the sent queue */
			TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, tp1,
			    sctp_next);
			stcb->asoc.sent_queue_cnt++;
		}
		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) && (queue == &stcb->asoc.sent_queue)) {
		/*
		 * The multi-part message was scattered across the send and
		 * sent queue.
		 */
		tp1 = TAILQ_FIRST(&stcb->asoc.send_queue);
		/*
		 * recurse throught the send_queue too, starting at the
		 * beginning.
		 */
		if (tp1) {
			ret_sz += sctp_release_pr_sctp_chunk(stcb, tp1, reason,
			    &stcb->asoc.send_queue);
		} else {
			printf("hmm, nothing on the send queue and no EOM?\n");
		}
	}
	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 ifaddr *
sctp_find_ifa_by_addr(struct sockaddr *sa)
{
	struct ifnet *ifn;
	struct ifaddr *ifa;

	/* go through all our known interfaces */
	TAILQ_FOREACH(ifn, &ifnet, if_list) {
		/* go through each interface addresses */
		TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
			/* correct family? */
			if (ifa->ifa_addr->sa_family != sa->sa_family)
				continue;

#ifdef INET6
			if (ifa->ifa_addr->sa_family == AF_INET6) {
				/* IPv6 address */
				struct sockaddr_in6 *sin1, *sin2, sin6_tmp;

				sin1 = (struct sockaddr_in6 *)ifa->ifa_addr;
				if (IN6_IS_SCOPE_LINKLOCAL(&sin1->sin6_addr)) {
					/* create a copy and clear scope */
					memcpy(&sin6_tmp, sin1,
					    sizeof(struct sockaddr_in6));
					sin1 = &sin6_tmp;
					in6_clearscope(&sin1->sin6_addr);
				}
				sin2 = (struct sockaddr_in6 *)sa;
				if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
				    sizeof(struct in6_addr)) == 0) {
					/* found it */
					return (ifa);
				}
			} else
#endif
			if (ifa->ifa_addr->sa_family == AF_INET) {
				/* IPv4 address */
				struct sockaddr_in *sin1, *sin2;

				sin1 = (struct sockaddr_in *)ifa->ifa_addr;
				sin2 = (struct sockaddr_in *)sa;
				if (sin1->sin_addr.s_addr ==
				    sin2->sin_addr.s_addr) {
					/* found it */
					return (ifa);
				}
			}
			/* else, not AF_INET or AF_INET6, so skip */
		}		/* end foreach ifa */
	}			/* end foreach ifn */
	/* not found! */
	return (NULL);
}








static void
sctp_user_rcvd(struct sctp_tcb *stcb, int *freed_so_far, int hold_rlock,
    uint32_t rwnd_req)
{
	/* User pulled some data, do we need a rwnd update? */
	int r_unlocked = 0;
	uint32_t dif, rwnd;
	struct socket *so = NULL;

	if (stcb == NULL)
		return;

	atomic_add_int(&stcb->asoc.refcnt, 1);

	if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
		/* 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 */
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
	sctp_misc_ints(SCTP_ENTER_USER_RECV,
	    (stcb->asoc.my_rwnd - stcb->asoc.my_last_reported_rwnd),
	    *freed_so_far,
	    stcb->freed_by_sorcv_sincelast,
	    rwnd_req);
#endif
	*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;
		}
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
		sctp_misc_ints(SCTP_USER_RECV_SACKS,
		    stcb->asoc.my_rwnd,
		    stcb->asoc.my_last_reported_rwnd,
		    stcb->freed_by_sorcv_sincelast,
		    dif);
#endif
		SCTP_STAT_INCR(sctps_wu_sacks_sent);
		sctp_send_sack(stcb);
		sctp_chunk_output(stcb->sctp_ep, stcb,
		    SCTP_OUTPUT_FROM_USR_RCVD);
		/* make sure no timer is running */
		sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL);
		SCTP_TCB_UNLOCK(stcb);
	} else {
		/* Update how much we have pending */
		stcb->freed_by_sorcv_sincelast = dif;
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
		sctp_misc_ints(SCTP_USER_RECV_SACKS,
		    stcb->asoc.my_rwnd,
		    stcb->asoc.my_last_reported_rwnd,
		    stcb->freed_by_sorcv_sincelast,
		    0);
#endif
	}
out:
	if (so && r_unlocked && hold_rlock) {
		SCTP_STAT_INCR(sctps_locks_in_rcv);
		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;
	int my_len = 0;
	int cp_len = 0, error = 0;
	struct sctp_queued_to_read *control = NULL, *ctl = NULL, *nxt = NULL;
	struct mbuf *m = NULL, *embuf = 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;
	int freed_so_far = 0;
	int copied_so_far = 0;
	int s, in_eeor_mode = 0;
	int no_rcv_needed = 0;
	uint32_t rwnd_req = 0;
	int hold_sblock = 0;
	int hold_rlock = 0;
	int alen = 0, slen = 0;
	int held_length = 0;

	if (msg_flags) {
		in_flags = *msg_flags;
	} else {
		in_flags = 0;
	}
	slen = uio->uio_resid;
	/* 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)) {
		return (EINVAL);
	}
	if ((in_flags & (MSG_DONTWAIT
	    | MSG_NBIO
	    )) ||
	    (so->so_state & SS_NBIO)) {
		block_allowed = 0;
	}
	/* setup the endpoint */
	inp = (struct sctp_inpcb *)so->so_pcb;
	if (inp == NULL) {
		return (EFAULT);
	}
	s = splnet();
	rwnd_req = (so->so_rcv.sb_hiwat >> 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);
#ifdef SCTP_RECV_RWND_LOGGING
	sctp_misc_ints(SCTP_SORECV_ENTER,
	    rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, uio->uio_resid);
#endif
	SOCKBUF_LOCK(&so->so_rcv);
	hold_sblock = 1;
#ifdef SCTP_RECV_RWND_LOGGING
	sctp_misc_ints(SCTP_SORECV_ENTERPL,
	    rwnd_req, block_allowed, so->so_rcv.sb_cc, uio->uio_resid);
#endif


	error = sblock(&so->so_rcv, (block_allowed ? M_WAITOK : 0));
	if (error) {
		goto release_unlocked;
	}
restart:
	if (hold_sblock == 0) {
		SOCKBUF_LOCK(&so->so_rcv);
		hold_sblock = 1;
	}
	sbunlock(&so->so_rcv);

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 (so->so_error || so->so_rcv.sb_state & SBS_CANTRCVMORE) {
		if (so->so_error) {
			error = so->so_error;
		} else {
			error = ENOTCONN;
		}
		goto out;
	}
	if ((so->so_rcv.sb_cc <= held_length) && block_allowed) {
		/* we need to wait for data */
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
		sctp_misc_ints(SCTP_SORECV_BLOCKSA,
		    0, 0, so->so_rcv.sb_cc, uio->uio_resid);
#endif
		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
					 */
					error = ECONNRESET;
					/*
					 * You get this once if you are
					 * active open side
					 */
					if (!(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
						/*
						 * Remove flag if on the
						 * active open side
						 */
						inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAS_ABORTED;
					}
				}
				so->so_state &= ~(SS_ISCONNECTING |
				    SS_ISDISCONNECTING |
				    SS_ISCONFIRMING |
				    SS_ISCONNECTED);
				if (error == 0) {
					if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
						error = ENOTCONN;
					} else {
						inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAS_CONNECTED;
					}
				}
				goto out;
			}
		}
		error = sbwait(&so->so_rcv);
		if (error) {
			goto out;
		}
		held_length = 0;
		goto restart_nosblocks;
	} else if (so->so_rcv.sb_cc == 0) {
		error = EWOULDBLOCK;
		goto out;
	}
	error = sblock(&so->so_rcv, (block_allowed ? M_WAITOK : 0));
	/* we possibly have data we can read */
	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);
			hold_rlock = 1;
		}
		control = TAILQ_FIRST(&inp->read_queue);
		if ((control == NULL) && (so->so_rcv.sb_cc != 0)) {
#ifdef INVARIENTS
			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.
		 */
		SCTP_STAT_INCR(sctps_locks_in_rcva);
		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;
			int cnt = 0;

			m = control->data;
			while (m) {
				cnt += m->m_len;
				if (m->m_next == NULL) {
					control->tail_mbuf = m;
					m->m_flags |= M_EOR;
					control->end_added = 1;
				}
				m = m->m_next;
			}
			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) {
		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)) {
					/* found one */
					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;
	if (hold_rlock) {
		SCTP_INP_READ_UNLOCK(inp);
		hold_rlock = 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_sblock) {
		SOCKBUF_UNLOCK(&so->so_rcv);
		hold_sblock = 0;
	}
	stcb = control->stcb;
	if (stcb) {
		if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
		    (control->do_not_ref_stcb == 0)) {
			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
			 */
			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 = stcb->freed_by_sorcv_sincelast;
			stcb->freed_by_sorcv_sincelast = 0;
		}
	}
	/* First lets get off the sinfo and sockaddr info */
	if ((sinfo) && filling_sinfo) {
		memcpy(sinfo, control, sizeof(struct sctp_nonpad_sndrcvinfo));
		nxt = TAILQ_NEXT(control, next);
		if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO)) {
			struct sctp_extrcvinfo *s_extra;

			s_extra = (struct sctp_extrcvinfo *)sinfo;
			if (nxt) {
				s_extra->next_flags = SCTP_NEXT_MSG_AVAIL;
				if (nxt->sinfo_flags & SCTP_UNORDERED) {
					s_extra->next_flags |= SCTP_NEXT_MSG_IS_UNORDERED;
				}
				s_extra->next_asocid = nxt->sinfo_assoc_id;
				s_extra->next_length = nxt->length;
				s_extra->next_ppid = nxt->sinfo_ppid;
				s_extra->next_stream = nxt->sinfo_stream;
				if (nxt->tail_mbuf != NULL) {
					if (nxt->tail_mbuf->m_flags & M_EOR) {
						s_extra->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
				 */
				s_extra->next_flags = SCTP_NO_NEXT_MSG;
				s_extra->next_asocid = 0;
				s_extra->next_length = 0;
				s_extra->next_ppid = 0;
				s_extra->next_stream = 0;
			}
		}
		/*
		 * update off the real current cum-ack, if we have an stcb.
		 */
		if (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 (fromlen && from) {
		struct sockaddr *to;

#ifdef AF_INET
		cp_len = min(fromlen, control->whoFrom->ro._l_addr.sin.sin_len);
		memcpy(from, &control->whoFrom->ro._l_addr, cp_len);
		((struct sockaddr_in *)from)->sin_port = control->port_from;
#else
		/* No AF_INET use AF_INET6 */
		cp_len = min(fromlen, control->whoFrom->ro._l_addr.sin6.sin6_len);
		memcpy(from, &control->whoFrom->ro._l_addr, cp_len);
		((struct sockaddr_in6 *)from)->sin6_port = control->port_from;
#endif

		to = from;
#if defined(AF_INET) && defined(AF_INET6)
		if ((inp->sctp_flags & SCTP_PCB_FLAGS_NEEDS_MAPPED_V4) &&
		    (to->sa_family == AF_INET) &&
		    ((size_t)fromlen >= sizeof(struct sockaddr_in6))) {
			struct sockaddr_in *sin;
			struct sockaddr_in6 sin6;

			sin = (struct sockaddr_in *)to;
			bzero(&sin6, sizeof(sin6));
			sin6.sin6_family = AF_INET6;
			sin6.sin6_len = sizeof(struct sockaddr_in6);
			sin6.sin6_addr.s6_addr16[2] = 0xffff;
			bcopy(&sin->sin_addr,
			    &sin6.sin6_addr.s6_addr16[3],
			    sizeof(sin6.sin6_addr.s6_addr16[3]));
			sin6.sin6_port = sin->sin_port;
			memcpy(from, (caddr_t)&sin6, sizeof(sin6));
		}
#endif
#if defined(AF_INET6)
		{
			struct sockaddr_in6 lsa6, *to6;

			to6 = (struct sockaddr_in6 *)to;
			sctp_recover_scope_mac(to6, (&lsa6));

		}
#endif
	}
	/* 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 */
			cp_len = (int)uio->uio_resid;
			my_len = (int)m->m_len;
			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;
			}
			splx(s);
			if (cp_len > 0)
				error = uiomove(mtod(m, char *), cp_len, uio);
			s = splnet();
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
			sctp_misc_ints(SCTP_SORCV_DOESCPY,
			    so->so_rcv.sb_cc,
			    cp_len,
			    0,
			    0);
#endif
			/* re-read */
			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
				goto release;
			}
			if (stcb &&
			    stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
				no_rcv_needed = 1;
			}
			if (error) {
				/* error we are out of here */
				goto release;
			}
			if ((m->m_next == NULL) &&
			    (cp_len >= m->m_len) &&
			    ((control->end_added == 0) ||
			    (control->end_added && (TAILQ_NEXT(control, next) == NULL)))
			    ) {
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
				sctp_misc_ints(SCTP_SORCV_DOESLCK,
				    so->so_rcv.sb_cc,
				    cp_len,
				    m->m_len,
				    control->length);
#endif
				SCTP_STAT_INCR(sctps_locks_in_rcvb);
				SCTP_INP_READ_LOCK(inp);
				hold_rlock = 1;
			}
			if (cp_len == m->m_len) {
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
				sctp_misc_ints(SCTP_SORCV_DOESADJ,
				    so->so_rcv.sb_cc,
				    control->length,
				    cp_len,
				    0);
#endif
				if (m->m_flags & M_EOR) {
					out_flags |= MSG_EOR;
				}
				if (m->m_flags & M_NOTIFICATION) {
					out_flags |= MSG_NOTIFICATION;
				}
				/* we ate up the mbuf */
				if (in_flags & MSG_PEEK) {
					/* just looking */
					m = m->m_next;
					copied_so_far += cp_len;
				} else {
					/* dispose of the mbuf */
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv,
					    control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, m->m_len);
#endif
					sctp_sbfree(control, stcb, &so->so_rcv, m);
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv,
					    control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
					embuf = m;
					copied_so_far += cp_len;
					freed_so_far += cp_len;
					alen = atomic_fetchadd_int(&control->length, -(cp_len));
					if (alen < cp_len) {
						panic("Control length goes negative?");
					}
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
					sctp_misc_ints(SCTP_SORCV_PASSBF,
					    so->so_rcv.sb_cc,
					    control->length,
					    0,
					    0);
#endif
					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 INVARIENTS
						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
						control->tail_mbuf = NULL;
#ifdef INVARIENTS
						if ((control->end_added) && ((out_flags & MSG_EOR) == 0)) {
							panic("end_added, nothing left and no MSG_EOR");
						}
#endif
					}
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
					sctp_misc_ints(SCTP_SORCV_ADJD,
					    so->so_rcv.sb_cc,
					    control->length,
					    0,
					    0);
#endif
				}
			} else {
				/* Do we need to trim the mbuf? */
				if (m->m_flags & M_NOTIFICATION) {
					out_flags |= MSG_NOTIFICATION;
				}
				if ((in_flags & MSG_PEEK) == 0) {
					if (out_flags & MSG_NOTIFICATION) {
						/*
						 * remark this one with the
						 * notify flag, they read
						 * only part of the
						 * notification.
						 */
						m->m_flags |= M_NOTIFICATION;
					}
					m->m_data += cp_len;
					m->m_len -= cp_len;
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, cp_len);
#endif
					atomic_subtract_int(&so->so_rcv.sb_cc, cp_len);
					if (stcb) {
						atomic_subtract_int(&stcb->asoc.sb_cc, cp_len);
					}
					copied_so_far += cp_len;
					embuf = m;
					freed_so_far += cp_len;
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb,
					    SCTP_LOG_SBRESULT, 0);
#endif
					alen = atomic_fetchadd_int(&control->length, -(cp_len));
					if (alen < cp_len) {
						panic("Control length goes negative2?");
					}
				} else {
					copied_so_far += cp_len;
				}
			}
			if ((out_flags & MSG_EOR) ||
			    (uio->uio_resid == 0)
			    ) {
				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);
			}
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
			sctp_misc_ints(SCTP_SORCV_BOTWHILE,
			    so->so_rcv.sb_cc,
			    control->length,
			    0,
			    0);
#endif

		}		/* 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 INVARIENTS
					panic("control->data not null at read eor?");
#else
					printf("Strange, data left in the control buffer .. invarients would panic?\n");
					sctp_m_freem(control->data);
					control->data = NULL;
#endif
				}
		done_with_control:
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
				sctp_misc_ints(SCTP_SORCV_FREECTL,
				    so->so_rcv.sb_cc,
				    0,
				    0,
				    0);
#endif
				if (TAILQ_NEXT(control, next) == NULL) {
					/*
					 * If we don't have a next we need a
					 * lock, if there is a next interupt
					 * is filling ahead of us and we
					 * don't need a lock to remove this
					 * guy (which is the head of the
					 * queue).
					 */
					if (hold_rlock == 0) {
						SCTP_STAT_INCR(sctps_locks_in_rcvc);
						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;
				}
				no_rcv_needed = control->do_not_ref_stcb;
				sctp_free_remote_addr(control->whoFrom);
				control->data = NULL;
				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 INVARIENTS
				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 ((uio->uio_resid == 0) ||
		    ((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 (so->so_error || so->so_rcv.sb_state & SBS_CANTRCVMORE) {
			goto release;
		}
		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;
		}
#ifdef SCTP_RECV_DETAIL_RWND_LOGGING
		if (stcb)
			sctp_misc_ints(SCTP_SORECV_BLOCKSB,
			    freed_so_far,
			    stcb->asoc.my_rwnd,
			    so->so_rcv.sb_cc,
			    uio->uio_resid);
		else
			sctp_misc_ints(SCTP_SORECV_BLOCKSB,
			    freed_so_far,
			    0,
			    so->so_rcv.sb_cc,
			    uio->uio_resid);
#endif
		if (so->so_rcv.sb_cc <= control->held_length) {
			error = sbwait(&so->so_rcv);
			if (error) {
				goto release;
			}
			control->held_length = 0;
		}
		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)
					out_flags |= MSG_TRUNC;
				goto done_with_control;
			}
			if (so->so_rcv.sb_cc > held_length) {
				SCTP_STAT_INCR(sctps_locks_in_rcvf);
				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?
				 */
				panic("Impossible data==NULL length !=0");
			}
			SCTP_INP_READ_UNLOCK(inp);
			/* We will fall around to get more data */
		}
		goto get_more_data;
	} else {
		/* copy out the mbuf chain */
get_more_data2:
		/*
		 * Do we have a uio, I doubt it if so we grab the size from
		 * it, if not you get it all
		 */
		if (uio)
			cp_len = uio->uio_resid;
		else
			cp_len = control->length;

		if ((uint32_t) cp_len >= control->length) {
			/* easy way */
			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->tail_mbuf->m_flags & M_EOR) {
				out_flags |= MSG_EOR;
			}
			if (control->data->m_flags & M_NOTIFICATION) {
				out_flags |= MSG_NOTIFICATION;
			}
			if (uio)
				uio->uio_resid -= control->length;
			*mp = control->data;
			m = control->data;
			while (m) {
#ifdef SCTP_SB_LOGGING
				sctp_sblog(&so->so_rcv,
				    control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, m->m_len);
#endif
				sctp_sbfree(control, stcb, &so->so_rcv, m);
				freed_so_far += m->m_len;
#ifdef SCTP_SB_LOGGING
				sctp_sblog(&so->so_rcv,
				    control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
				m = m->m_next;
			}
			control->data = control->tail_mbuf = NULL;
			control->length = 0;
			if (out_flags & MSG_EOR) {
				/* Done with this control */
				goto done_with_control;
			}
			/* still more to do with this conntrol */
			/* do we really support msg_waitall here? */
			if ((block_allowed == 0) ||
			    ((in_flags & MSG_WAITALL) == 0)) {
				goto release;
			}
	wait_some_more2:
			if (so->so_error || so->so_rcv.sb_state & SBS_CANTRCVMORE)
				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 (so->so_rcv.sb_cc <= control->held_length) {
				error = sbwait(&so->so_rcv);
				if (error) {
					goto release;
				}
			}
			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.
					 * shutdown
					 */
					out_flags |= MSG_EOR;
					if (control->pdapi_aborted)
						out_flags |= MSG_TRUNC;
					goto done_with_control;
				}
				if (so->so_rcv.sb_cc > held_length) {
					control->held_length = so->so_rcv.sb_cc;
					/*
					 * We don't use held_length while
					 * getting a message
					 */
					held_length = 0;
				}
				goto wait_some_more2;
			}
			goto get_more_data2;
		} else {
			/* hard way mbuf by mbuf */
			m = control->data;
			if (control->end_added == 0) {
				/* need the rlock */
				if (hold_rlock == 0) {
					SCTP_INP_READ_LOCK(inp);
					hold_rlock = 1;
				}
			}
			if (m->m_flags & M_NOTIFICATION) {
				out_flags |= MSG_NOTIFICATION;
			}
			while ((m) && (cp_len > 0)) {
				if (cp_len >= m->m_len) {
					*mp = m;
					atomic_subtract_int(&control->length, m->m_len);
					if (uio)
						uio->uio_resid -= m->m_len;
					cp_len -= m->m_len;
					control->data = m->m_next;
					m->m_next = NULL;
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv,
					    control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, m->m_len);
#endif
					sctp_sbfree(control, stcb, &so->so_rcv, m);
					freed_so_far += m->m_len;
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv,
					    control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
#endif
					mp = &m->m_next;
					m = control->data;
				} else {
					/*
					 * got all he wants and its part of
					 * this mbuf only.
					 */
					if (uio)
						uio->uio_resid -= m->m_len;
					cp_len -= m->m_len;
					if (hold_rlock) {
						SCTP_INP_READ_UNLOCK(inp);
						hold_rlock = 0;
					}
					if (hold_sblock) {
						SOCKBUF_UNLOCK(&so->so_rcv);
						hold_sblock = 0;
					}
					splx(s);
					*mp = sctp_m_copym(m, 0, cp_len,
					    M_TRYWAIT
					    );
					s = splnet();
#ifdef SCTP_LOCK_LOGGING
					sctp_log_lock(inp, stcb, SCTP_LOG_LOCK_SOCKBUF_R);
#endif
					if (hold_sblock == 0) {
						SOCKBUF_LOCK(&so->so_rcv);
						hold_sblock = 1;
					}
					if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)
						goto release;

					if (stcb &&
					    stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
						no_rcv_needed = 1;
					}
					m->m_data += cp_len;
					m->m_len -= cp_len;
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, cp_len);
#endif
					freed_so_far += cp_len;
					atomic_subtract_int(&so->so_rcv.sb_cc, cp_len);
					if (stcb) {
						atomic_subtract_int(&stcb->asoc.sb_cc, cp_len);
						if ((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);
					}
#ifdef SCTP_SB_LOGGING
					sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb,
					    SCTP_LOG_SBRESULT, 0);
#endif
					if (out_flags & MSG_NOTIFICATION) {
						/*
						 * remark the first mbuf if
						 * they took a partial read.
						 */
						control->data->m_flags |= M_NOTIFICATION;
					}
					goto release;
				}
			}
		}
	}
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;
	}
	sbunlock(&so->so_rcv);

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);
	}
	if (msg_flags)
		*msg_flags |= out_flags;
out:
	if (hold_rlock == 1) {
		SCTP_INP_READ_UNLOCK(inp);
		hold_rlock = 0;
	}
	if (hold_sblock) {
		SOCKBUF_UNLOCK(&so->so_rcv);
		hold_sblock = 0;
	}
	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) {
			panic("stcb for refcnt has gone NULL?");
		}
		atomic_add_int(&stcb->asoc.refcnt, -1);
		freecnt_applied = 0;
		/* Save the value back for next time */
		stcb->freed_by_sorcv_sincelast = freed_so_far;
	}
	splx(s);
#ifdef SCTP_RECV_RWND_LOGGING
	if (stcb) {
		sctp_misc_ints(SCTP_SORECV_DONE,
		    freed_so_far,
		    ((uio) ? (slen - uio->uio_resid) : slen),
		    stcb->asoc.my_rwnd,
		    so->so_rcv.sb_cc);
	} else {
		sctp_misc_ints(SCTP_SORECV_DONE,
		    freed_so_far,
		    ((uio) ? (slen - uio->uio_resid) : slen),
		    0,
		    so->so_rcv.sb_cc);
	}
#endif
	if (wakeup_read_socket) {
		sctp_sorwakeup(inp, so);
	}
	return (error);
}


#ifdef SCTP_MBUF_LOGGING
struct mbuf *
sctp_m_free(struct mbuf *m)
{
	if (m->m_flags & M_EXT) {
		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_soreceive(so, psa, uio, mp0, controlp, flagsp)
	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;
	struct sctp_inpcb *inp;

	inp = (struct sctp_inpcb *)so->so_pcb;
	/* pickup the assoc we are reading from */
	if (inp == NULL) {
		return (EINVAL);
	}
	if ((sctp_is_feature_off(inp,
	    SCTP_PCB_FLAGS_RECVDATAIOEVNT)) ||
	    (controlp == NULL)) {
		/* user does not want the sndrcv ctl */
		filling_sinfo = 0;
	}
	if (psa) {
		from = (struct sockaddr *)sockbuf;
		fromlen = sizeof(sockbuf);
		from->sa_len = 0;
	} else {
		from = NULL;
		fromlen = 0;
	}

	error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, flagsp,
	    (struct sctp_sndrcvinfo *)&sinfo, filling_sinfo);
	if ((controlp) && (filling_sinfo)) {
		/* copy back the sinfo in a CMSG format */
		if (filling_sinfo)
			*controlp = sctp_build_ctl_nchunk(inp,
			    (struct sctp_sndrcvinfo *)&sinfo);
		else
			*controlp = NULL;
	}
	if (psa) {
		/* copy back the address info */
		if (from && from->sa_len) {
			*psa = sodupsockaddr(from, M_NOWAIT);
		} else {
			*psa = NULL;
		}
	}
	return (error);
}