xref: /netbsd-src/sys/netinet/sctp_pcb.c (revision 3117ece4fc4a4ca4489ba793710b60b0d26bab6c)

/* $KAME: sctp_pcb.c,v 1.39 2005/06/16 18:29:25 jinmei Exp $ */
/* $NetBSD: sctp_pcb.c,v 1.27 2024/07/05 04:31:54 rin Exp $ */

/*
 * Copyright (c) 2001, 2002, 2003, 2004 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Cisco Systems, Inc.
 * 4. Neither the name of the project 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 CISCO SYSTEMS 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 CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sctp_pcb.c,v 1.27 2024/07/05 04:31:54 rin Exp $");

#ifdef _KERNEL_OPT
#include "opt_inet.h"
#include "opt_ipsec.h"
#include "opt_sctp.h"
#endif /* _KERNEL_OPT */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/callout.h>

#include <machine/limits.h>
#include <machine/cpu.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/scope6_var.h>
#include <netinet6/in6_pcb.h>
#endif /* INET6 */

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

#include <netinet/sctp_var.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp.h>
#include <netinet/sctp_header.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_timer.h>

#ifndef SCTP_PCBHASHSIZE
/* default number of association hash buckets in each endpoint */
#define SCTP_PCBHASHSIZE 256
#endif

#ifdef SCTP_DEBUG
u_int32_t sctp_debug_on = SCTP_DEBUG_ALL;
#endif /* SCTP_DEBUG */

u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];

int sctp_pcbtblsize = SCTP_PCBHASHSIZE;

struct sctp_epinfo sctppcbinfo;

/* FIX: we don't handle multiple link local scopes */
/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
int
SCTP6_ARE_ADDR_EQUAL(const struct in6_addr *a, const struct in6_addr *b)
{
	struct in6_addr tmp_a, tmp_b;
	/* use a copy of a and b */
	tmp_a = *a;
	tmp_b = *b;
	in6_clearscope(&tmp_a);
	in6_clearscope(&tmp_b);
	return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
}

#if defined(__FreeBSD__) && __FreeBSD_version > 500000

#ifndef xyzzy
void sctp_validate_no_locks(void);

void
SCTP_INP_RLOCK(struct sctp_inpcb *inp)
{
	struct sctp_tcb *stcb;
	LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
		if (mtx_owned(&(stcb)->tcb_mtx))
			panic("I own TCB lock?");
	}
        if (mtx_owned(&(inp)->inp_mtx))
		panic("INP Recursive Lock-R");
        mtx_lock(&(inp)->inp_mtx);
}

void
SCTP_INP_WLOCK(struct sctp_inpcb *inp)
{
	SCTP_INP_RLOCK(inp);
}

void
SCTP_INP_INFO_RLOCK()
{
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb;
	LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
		if (mtx_owned(&(inp)->inp_mtx))
			panic("info-lock and own inp lock?");
		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
			if (mtx_owned(&(stcb)->tcb_mtx))
				panic("Info lock and own a tcb lock?");
		}
	}
	if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
		panic("INP INFO Recursive Lock-R");
	mtx_lock(&sctppcbinfo.ipi_ep_mtx);
}

void
SCTP_INP_INFO_WLOCK()
{
	SCTP_INP_INFO_RLOCK();
}


void sctp_validate_no_locks()
{
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb;

	if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
		panic("INP INFO lock is owned?");

	LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
		if (mtx_owned(&(inp)->inp_mtx))
			panic("You own an INP lock?");
		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
			if (mtx_owned(&(stcb)->tcb_mtx))
				panic("You own a TCB lock?");
		}
	}
}

#endif
#endif

void
sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
{
	/* We really don't need
	 * to lock this, but I will
	 * just because it does not hurt.
	 */
	SCTP_INP_INFO_RLOCK();
	spcb->ep_count = sctppcbinfo.ipi_count_ep;
	spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
	spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
	spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
	spcb->chk_count = sctppcbinfo.ipi_count_chunk;
	spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
	spcb->mbuf_track = sctppcbinfo.mbuf_track;
	SCTP_INP_INFO_RUNLOCK();
}


/*
 * Notes on locks for FreeBSD 5 and up. All association
 * lookups that have a definte ep, the INP structure is
 * assumed to be locked for reading. If we need to go
 * find the INP (usually when a **inp is passed) then
 * we must lock the INFO structure first and if needed
 * lock the INP too. Note that if we lock it we must
 *
 */


/*
 * Given a endpoint, look and find in its association list any association
 * with the "to" address given. This can be a "from" address, too, for
 * inbound packets. For outbound packets it is a true "to" address.
 */
static struct sctp_tcb *
sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
			struct sockaddr *to, struct sctp_nets **netp)
{
	/**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */

	/*
	 * Note for this module care must be taken when observing what to is
	 * for. In most of the rest of the code the TO field represents my
	 * peer and the FROM field represents my address. For this module it
	 * is reversed of that.
	 */
	/*
	 * If we support the TCP model, then we must now dig through to
	 * see if we can find our endpoint in the list of tcp ep's.
	 */
	uint16_t lport, rport;
	struct sctppcbhead *ephead;
	struct sctp_inpcb *inp;
	struct sctp_laddr *laddr;
	struct sctp_tcb *stcb;
	struct sctp_nets *net;

	if ((to == NULL) || (from == NULL)) {
		return (NULL);
	}

	if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
		lport = ((struct sockaddr_in *)to)->sin_port;
		rport = ((struct sockaddr_in *)from)->sin_port;
	} else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
		lport = ((struct sockaddr_in6 *)to)->sin6_port;
		rport = ((struct sockaddr_in6 *)from)->sin6_port;
	} else {
		return NULL;
	}
	ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
						     (lport + rport), sctppcbinfo.hashtcpmark)];
	/*
	 * Ok now for each of the guys in this bucket we must look
	 * and see:
	 *  - Does the remote port match.
	 *  - Does there single association's addresses match this
	 *    address (to).
	 * If so we update p_ep to point to this ep and return the
	 * tcb from it.
	 */
	LIST_FOREACH(inp, ephead, sctp_hash) {
		if (lport != inp->sctp_lport) {
			continue;
		}
		SCTP_INP_RLOCK(inp);
		/* check to see if the ep has one of the addresses */
		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
			/* We are NOT bound all, so look further */
			int match = 0;

			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
				if (laddr->ifa == NULL) {
#ifdef SCTP_DEBUG
					if (sctp_debug_on & SCTP_DEBUG_PCB1) {
						printf("An ounce of prevention is worth a pound of cure\n");
					}
#endif
					continue;
				}
				if (laddr->ifa->ifa_addr == NULL) {
#ifdef SCTP_DEBUG
					if (sctp_debug_on & SCTP_DEBUG_PCB1) {
						printf("ifa with a NULL address\n");
					}
#endif
					continue;
				}
				if (laddr->ifa->ifa_addr->sa_family ==
				    to->sa_family) {
					/* see if it matches */
					struct sockaddr_in *intf_addr, *sin;
					intf_addr = (struct sockaddr_in *)
						laddr->ifa->ifa_addr;
					sin = (struct sockaddr_in *)to;
					if (from->sa_family == AF_INET) {
						if (sin->sin_addr.s_addr ==
						    intf_addr->sin_addr.s_addr) {
							match = 1;
							SCTP_INP_RUNLOCK(inp);
							break;
						}
					} else {
						struct sockaddr_in6 *intf_addr6;
						struct sockaddr_in6 *sin6;
						sin6 = (struct sockaddr_in6 *)
							to;
						intf_addr6 = (struct sockaddr_in6 *)
							laddr->ifa->ifa_addr;

						if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
									 &intf_addr6->sin6_addr)) {
							match = 1;
							SCTP_INP_RUNLOCK(inp);
							break;
						}
					}
				}
			}
			if (match == 0) {
				/* This endpoint does not have this address */
				SCTP_INP_RUNLOCK(inp);
				continue;
			}
		}
		/*
		 * Ok if we hit here the ep has the address, does it hold the
		 * tcb?
		 */

		stcb = LIST_FIRST(&inp->sctp_asoc_list);
		if (stcb == NULL) {
			SCTP_INP_RUNLOCK(inp);
			continue;
		}
		SCTP_TCB_LOCK(stcb);
		if (stcb->rport != rport) {
			/* remote port does not match. */
			SCTP_TCB_UNLOCK(stcb);
			SCTP_INP_RUNLOCK(inp);
			continue;
		}
		/* Does this TCB have a matching address? */
		TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
			if (sctp_cmpaddr(from, rtcache_getdst(&net->ro))) {
				/* found it */
				if (netp != NULL) {
					*netp = net;
				}
				/* Update the endpoint pointer */
				*inp_p = inp;
				SCTP_INP_RUNLOCK(inp);
				return (stcb);
			}
		}
		SCTP_TCB_UNLOCK(stcb);

		SCTP_INP_RUNLOCK(inp);
	}
	return (NULL);
}

struct sctp_tcb *
sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
    struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
{
	struct sctp_tcb *stcb;
	struct sockaddr_in *sin;
	struct sockaddr_in6 *sin6;
	struct sockaddr_storage local_store, remote_store;
	struct ip *iph;
	struct sctp_paramhdr parm_buf, *phdr;
	int ptype;

	memset(&local_store, 0, sizeof(local_store));
	memset(&remote_store, 0, sizeof(remote_store));

	/* First get the destination address setup too. */
	iph = mtod(m, struct ip *);
	if (iph->ip_v == IPVERSION) {
		/* its IPv4 */
		sin = (struct sockaddr_in *)&local_store;
		sin->sin_family = AF_INET;
		sin->sin_len = sizeof(*sin);
		sin->sin_port = sh->dest_port;
		sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
	} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
		/* its IPv6 */
		struct ip6_hdr *ip6;
		ip6 = mtod(m, struct ip6_hdr *);
		sin6 = (struct sockaddr_in6 *)&local_store;
		sin6->sin6_family = AF_INET6;
		sin6->sin6_len = sizeof(*sin6);
		sin6->sin6_port = sh->dest_port;
		sin6->sin6_addr = ip6->ip6_dst;
	} else {
		return NULL;
	}

	phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
	    &parm_buf, sizeof(struct sctp_paramhdr));
	if (phdr == NULL) {
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
			printf("sctp_process_control: failed to get asconf lookup addr\n");
		}
#endif /* SCTP_DEBUG */
		return NULL;
	}
	ptype = (int)((u_int)ntohs(phdr->param_type));
	/* get the correlation address */
	if (ptype == SCTP_IPV6_ADDRESS) {
		/* ipv6 address param */
		struct sctp_ipv6addr_param *p6, p6_buf;
		if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
			return NULL;
		}

		p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
		    offset + sizeof(struct sctp_asconf_chunk),
		    &p6_buf.ph, sizeof(*p6));
		if (p6 == NULL) {
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
				printf("sctp_process_control: failed to get asconf v6 lookup addr\n");
			}
#endif /* SCTP_DEBUG */
			return (NULL);
		}
		sin6 = (struct sockaddr_in6 *)&remote_store;
		sin6->sin6_family = AF_INET6;
		sin6->sin6_len = sizeof(*sin6);
		sin6->sin6_port = sh->src_port;
		memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
	} else if (ptype == SCTP_IPV4_ADDRESS) {
		/* ipv4 address param */
		struct sctp_ipv4addr_param *p4, p4_buf;
		if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
			return NULL;
		}

		p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
		    offset + sizeof(struct sctp_asconf_chunk),
		    &p4_buf.ph, sizeof(*p4));
		if (p4 == NULL) {
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
				printf("sctp_process_control: failed to get asconf v4 lookup addr\n");
			}
#endif /* SCTP_DEBUG */
			return (NULL);
		}
		sin = (struct sockaddr_in *)&remote_store;
		sin->sin_family = AF_INET;
		sin->sin_len = sizeof(*sin);
		sin->sin_port = sh->src_port;
		memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
	} else {
		/* invalid address param type */
		return NULL;
	}

	stcb = sctp_findassociation_ep_addr(inp_p,
	    (struct sockaddr *)&remote_store, netp,
	    (struct sockaddr *)&local_store, NULL);
	return (stcb);
}

struct sctp_tcb *
sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
    struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
{
	struct sctpasochead *head;
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb;
	struct sctp_nets *net;
	uint16_t rport;

	inp = *inp_p;
	if (remote->sa_family == AF_INET) {
		rport = (((struct sockaddr_in *)remote)->sin_port);
	} else if (remote->sa_family == AF_INET6) {
		rport = (((struct sockaddr_in6 *)remote)->sin6_port);
	} else {
		return (NULL);
	}
	if (locked_tcb) {
		/* UN-lock so we can do proper locking here
		 * this occurs when called from load_addresses_from_init.
		 */
		SCTP_TCB_UNLOCK(locked_tcb);
	}
	SCTP_INP_INFO_RLOCK();
	if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
		/*
		 * Now either this guy is our listner or it's the connector.
		 * If it is the one that issued the connect, then it's only
		 * chance is to be the first TCB in the list. If it is the
		 * acceptor, then do the special_lookup to hash and find the
		 * real inp.
		 */
		if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
			/* to is peer addr, from is my addr */
			stcb = sctp_tcb_special_locate(inp_p, remote, local,
						       netp);
			if ((stcb != NULL) && (locked_tcb == NULL)){
				/* we have a locked tcb, lower refcount */
				SCTP_INP_WLOCK(inp);
				SCTP_INP_DECR_REF(inp);
				SCTP_INP_WUNLOCK(inp);
			}
			if (locked_tcb != NULL) {
				SCTP_INP_RLOCK(locked_tcb->sctp_ep);
				SCTP_TCB_LOCK(locked_tcb);
				SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
				if (stcb != NULL) {
					SCTP_TCB_UNLOCK(stcb);
				}
			}
			SCTP_INP_INFO_RUNLOCK();
			return (stcb);
		} else {
			SCTP_INP_WLOCK(inp);
			stcb = LIST_FIRST(&inp->sctp_asoc_list);
			if (stcb == NULL) {
				goto null_return;
			}
			SCTP_TCB_LOCK(stcb);
			if (stcb->rport != rport) {
				/* remote port does not match. */
				SCTP_TCB_UNLOCK(stcb);
				goto null_return;
			}
			/* now look at the list of remote addresses */
			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
				if (sctp_cmpaddr(remote, rtcache_getdst(&net->ro))) {
					/* found it */
					if (netp != NULL) {
						*netp = net;
					}
					if (locked_tcb == NULL) {
						SCTP_INP_DECR_REF(inp);
					}
					SCTP_INP_WUNLOCK(inp);
					SCTP_INP_INFO_RUNLOCK();
					return (stcb);
				}
			}
			SCTP_TCB_UNLOCK(stcb);
		}
	} else {
		SCTP_INP_WLOCK(inp);
		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
							       inp->sctp_hashmark)];
		if (head == NULL) {
			goto null_return;
		}
		LIST_FOREACH(stcb, head, sctp_tcbhash) {
			if (stcb->rport != rport) {
				/* remote port does not match */
				continue;
			}
			/* now look at the list of remote addresses */
			SCTP_TCB_LOCK(stcb);
			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
				if (sctp_cmpaddr(remote, rtcache_getdst(&net->ro))) {
					/* found it */
					if (netp != NULL) {
						*netp = net;
					}
					if (locked_tcb == NULL) {
						SCTP_INP_DECR_REF(inp);
					}
					SCTP_INP_WUNLOCK(inp);
					SCTP_INP_INFO_RUNLOCK();
					return (stcb);
				}
			}
			SCTP_TCB_UNLOCK(stcb);
		}
	}
 null_return:
	/* clean up for returning null */
	if (locked_tcb){
		if (locked_tcb->sctp_ep != inp) {
			SCTP_INP_RLOCK(locked_tcb->sctp_ep);
			SCTP_TCB_LOCK(locked_tcb);
			SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
		} else {
			SCTP_TCB_LOCK(locked_tcb);
		}
	}
	SCTP_INP_WUNLOCK(inp);
	SCTP_INP_INFO_RUNLOCK();
	/* not found */
	return (NULL);
}

/*
 * Find an association for a specific endpoint using the association id
 * given out in the COMM_UP notification
 */
struct sctp_tcb *
sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, vaddr_t asoc_id)
{
	/*
	 * Use my the assoc_id to find a endpoint
	 */
	struct sctpasochead *head;
	struct sctp_tcb *stcb;
	u_int32_t vtag;

	if (asoc_id == 0 || inp == NULL) {
		return (NULL);
	}
	SCTP_INP_INFO_RLOCK();
	vtag = (u_int32_t)asoc_id;
	head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
	    sctppcbinfo.hashasocmark)];
	if (head == NULL) {
		/* invalid vtag */
		SCTP_INP_INFO_RUNLOCK();
		return (NULL);
	}
	LIST_FOREACH(stcb, head, sctp_asocs) {
		SCTP_INP_RLOCK(stcb->sctp_ep);
		SCTP_TCB_LOCK(stcb);
		SCTP_INP_RUNLOCK(stcb->sctp_ep);
		if (stcb->asoc.my_vtag == vtag) {
			/* candidate */
			if (inp != stcb->sctp_ep) {
				/* some other guy has the
				 * same vtag active (vtag collision).
				 */
				sctp_pegs[SCTP_VTAG_BOGUS]++;
				SCTP_TCB_UNLOCK(stcb);
				continue;
			}
			sctp_pegs[SCTP_VTAG_EXPR]++;
			SCTP_INP_INFO_RUNLOCK();
			return (stcb);
		}
		SCTP_TCB_UNLOCK(stcb);
	}
	SCTP_INP_INFO_RUNLOCK();
	return (NULL);
}

static struct sctp_inpcb *
sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
		    uint16_t lport)
{
	struct sctp_inpcb *inp;
	struct sockaddr_in *sin;
	struct sockaddr_in6 *sin6;
	struct sctp_laddr *laddr;

	/* Endpoing probe expects
	 * that the INP_INFO is locked.
	 */
	if (nam->sa_family == AF_INET) {
		sin = (struct sockaddr_in *)nam;
		sin6 = NULL;
	} else if (nam->sa_family == AF_INET6) {
		sin6 = (struct sockaddr_in6 *)nam;
		sin = NULL;
	} else {
		/* unsupported family */
		return (NULL);
	}
	if (head == NULL)
		return (NULL);

	LIST_FOREACH(inp, head, sctp_hash) {
		SCTP_INP_RLOCK(inp);

		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
		    (inp->sctp_lport == lport)) {
			/* got it */
			if ((nam->sa_family == AF_INET) &&
			    (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
			    (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
				) {
				/* IPv4 on a IPv6 socket with ONLY IPv6 set */
				SCTP_INP_RUNLOCK(inp);
				continue;
			}
			/* A V6 address and the endpoint is NOT bound V6 */
			if (nam->sa_family == AF_INET6 &&
			   (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
				SCTP_INP_RUNLOCK(inp);
				continue;
			}
			SCTP_INP_RUNLOCK(inp);
			return (inp);
		}
		SCTP_INP_RUNLOCK(inp);
	}

	if ((nam->sa_family == AF_INET) &&
	    (sin->sin_addr.s_addr == INADDR_ANY)) {
		/* Can't hunt for one that has no address specified */
		return (NULL);
	} else if ((nam->sa_family == AF_INET6) &&
		   (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
		/* Can't hunt for one that has no address specified */
		return (NULL);
	}
	/*
	 * ok, not bound to all so see if we can find a EP bound to this
	 * address.
	 */
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
	}
#endif
	LIST_FOREACH(inp, head, sctp_hash) {
		SCTP_INP_RLOCK(inp);
		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
			SCTP_INP_RUNLOCK(inp);
			continue;
		}
		/*
		 * Ok this could be a likely candidate, look at all of
		 * its addresses
		 */
		if (inp->sctp_lport != lport) {
			SCTP_INP_RUNLOCK(inp);
			continue;
		}
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB1) {
			printf("Ok, found matching local port\n");
		}
#endif
		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
			if (laddr->ifa == NULL) {
#ifdef SCTP_DEBUG
				if (sctp_debug_on & SCTP_DEBUG_PCB1) {
					printf("An ounce of prevention is worth a pound of cure\n");
				}
#endif
				continue;
			}
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB1) {
				printf("Ok laddr->ifa:%p is possible, ",
				    laddr->ifa);
			}
#endif
			if (laddr->ifa->ifa_addr == NULL) {
#ifdef SCTP_DEBUG
				if (sctp_debug_on & SCTP_DEBUG_PCB1) {
					printf("Huh IFA as an ifa_addr=NULL, ");
				}
#endif
				continue;
			}
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB1) {
				printf("Ok laddr->ifa:%p is possible, ",
				    laddr->ifa->ifa_addr);
				sctp_print_address(laddr->ifa->ifa_addr);
				printf("looking for ");
				sctp_print_address(nam);
			}
#endif
			if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
				/* possible, see if it matches */
				struct sockaddr_in *intf_addr;
				intf_addr = (struct sockaddr_in *)
				    laddr->ifa->ifa_addr;
				if (nam->sa_family == AF_INET) {
					if (sin->sin_addr.s_addr ==
					    intf_addr->sin_addr.s_addr) {
#ifdef SCTP_DEBUG
						if (sctp_debug_on & SCTP_DEBUG_PCB1) {
							printf("YES, return ep:%p\n", inp);
						}
#endif
						SCTP_INP_RUNLOCK(inp);
						return (inp);
					}
				} else if (nam->sa_family == AF_INET6) {
					struct sockaddr_in6 *intf_addr6;
					intf_addr6 = (struct sockaddr_in6 *)
					    laddr->ifa->ifa_addr;
					if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
				 	    &intf_addr6->sin6_addr)) {
#ifdef SCTP_DEBUG
						if (sctp_debug_on & SCTP_DEBUG_PCB1) {
							printf("YES, return ep:%p\n", inp);
						}
#endif
						SCTP_INP_RUNLOCK(inp);
						return (inp);
					}
				}
			}
			SCTP_INP_RUNLOCK(inp);
		}
	}
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("NO, Falls out to NULL\n");
	}
#endif
	return (NULL);
}


struct sctp_inpcb *
sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
{
	/*
	 * First we check the hash table to see if someone has this port
	 * bound with just the port.
	 */
	struct sctp_inpcb *inp;
	struct sctppcbhead *head;
	int lport;
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Looking for endpoint %d :",
		       ntohs(((struct sockaddr_in *)nam)->sin_port));
		sctp_print_address(nam);
	}
#endif
	if (nam->sa_family == AF_INET) {
		lport = ((struct sockaddr_in *)nam)->sin_port;
	} else if (nam->sa_family == AF_INET6) {
		lport = ((struct sockaddr_in6 *)nam)->sin6_port;
	} else {
		/* unsupported family */
		return (NULL);
	}
	/*
	 * I could cheat here and just cast to one of the types but we will
	 * do it right. It also provides the check against an Unsupported
	 * type too.
	 */
	/* Find the head of the ALLADDR chain */
	if (have_lock == 0) {
		SCTP_INP_INFO_RLOCK();
	}
	head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
							     sctppcbinfo.hashmark)];
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Main hash to lookup at head:%p\n", head);
	}
#endif
 	inp = sctp_endpoint_probe(nam, head, lport);

	/*
	 * If the TCP model exists it could be that the main listening
	 * endpoint is gone but there exists a connected socket for this
	 * guy yet. If so we can return the first one that we find. This
	 * may NOT be the correct one but the sctp_findassociation_ep_addr
	 * has further code to look at all TCP models.
	 */
	if (inp == NULL && find_tcp_pool) {
		unsigned int i;
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB1) {
			printf("EP was NULL and TCP model is supported\n");
		}
#endif
		for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
			/*
			 * This is real gross, but we do NOT have a remote
			 * port at this point depending on who is calling. We
			 * must therefore look for ANY one that matches our
			 * local port :/
			 */
			head = &sctppcbinfo.sctp_tcpephash[i];
			if (LIST_FIRST(head)) {
				inp = sctp_endpoint_probe(nam, head, lport);
				if (inp) {
					/* Found one */
					break;
				}
			}
		}
	}
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("EP to return is %p\n", inp);
	}
#endif
	if (have_lock == 0) {
		if (inp) {
			SCTP_INP_WLOCK(inp);
			SCTP_INP_INCR_REF(inp);
			SCTP_INP_WUNLOCK(inp);
		}
		SCTP_INP_INFO_RUNLOCK();
	} else {
		if (inp) {
			SCTP_INP_WLOCK(inp);
			SCTP_INP_INCR_REF(inp);
			SCTP_INP_WUNLOCK(inp);
		}
	}
	return (inp);
}

/*
 * Find an association for an endpoint with the pointer to whom you want
 * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
 * We may need to change the *to to some other struct like a mbuf...
 */
struct sctp_tcb *
sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
    struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
{
	struct sctp_inpcb *inp;
	struct sctp_tcb *retval;

	SCTP_INP_INFO_RLOCK();
	if (find_tcp_pool) {
		if (inp_p != NULL) {
			retval = sctp_tcb_special_locate(inp_p, from, to, netp);
		} else {
			retval = sctp_tcb_special_locate(&inp, from, to, netp);
		}
		if (retval != NULL) {
			SCTP_INP_INFO_RUNLOCK();
			return (retval);
		}
	}
	inp = sctp_pcb_findep(to, 0, 1);
	if (inp_p != NULL) {
		*inp_p = inp;
	}
	SCTP_INP_INFO_RUNLOCK();

	if (inp == NULL) {
		return (NULL);
	}

	/*
	 * ok, we have an endpoint, now lets find the assoc for it (if any)
	 * we now place the source address or from in the to of the find
	 * endpoint call. Since in reality this chain is used from the
	 * inbound packet side.
	 */
	if (inp_p != NULL) {
		return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
	} else {
		return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
	}
}


/*
 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
 * find all addresses that the sender has specified in any address list.
 * Each address will be used to lookup the TCB and see if one exits.
 */
static struct sctp_tcb *
sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
    struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
    struct sockaddr *dest)
{
	struct sockaddr_in sin4;
	struct sockaddr_in6 sin6;
	struct sctp_paramhdr *phdr, parm_buf;
	struct sctp_tcb *retval;
	u_int32_t ptype, plen;

	memset(&sin4, 0, sizeof(sin4));
	memset(&sin6, 0, sizeof(sin6));
	sin4.sin_len = sizeof(sin4);
	sin4.sin_family = AF_INET;
	sin4.sin_port = sh->src_port;
	sin6.sin6_len = sizeof(sin6);
	sin6.sin6_family = AF_INET6;
	sin6.sin6_port = sh->src_port;

	retval = NULL;
	offset += sizeof(struct sctp_init_chunk);

	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
	while (phdr != NULL) {
		/* now we must see if we want the parameter */
		ptype = ntohs(phdr->param_type);
		plen = ntohs(phdr->param_length);
		if (plen == 0) {
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB1) {
				printf("sctp_findassociation_special_addr: Impossible length in parameter\n");
			}
#endif /* SCTP_DEBUG */
			break;
		}
		if (ptype == SCTP_IPV4_ADDRESS &&
		    plen == sizeof(struct sctp_ipv4addr_param)) {
			/* Get the rest of the address */
			struct sctp_ipv4addr_param ip4_parm, *p4;

			phdr = sctp_get_next_param(m, offset,
			    (struct sctp_paramhdr *)&ip4_parm, plen);
			if (phdr == NULL) {
				return (NULL);
			}
			p4 = (struct sctp_ipv4addr_param *)phdr;
			memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
			/* look it up */
			retval = sctp_findassociation_ep_addr(inp_p,
			    (struct sockaddr *)&sin4, netp, dest, NULL);
			if (retval != NULL) {
				return (retval);
			}
		} else if (ptype == SCTP_IPV6_ADDRESS &&
		    plen == sizeof(struct sctp_ipv6addr_param)) {
			/* Get the rest of the address */
			struct sctp_ipv6addr_param ip6_parm, *p6;

			phdr = sctp_get_next_param(m, offset,
			    (struct sctp_paramhdr *)&ip6_parm, plen);
			if (phdr == NULL) {
				return (NULL);
			}
			p6 = (struct sctp_ipv6addr_param *)phdr;
			memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
			/* look it up */
			retval = sctp_findassociation_ep_addr(inp_p,
			    (struct sockaddr *)&sin6, netp, dest, NULL);
			if (retval != NULL) {
				return (retval);
			}
		}
		offset += SCTP_SIZE32(plen);
		phdr = sctp_get_next_param(m, offset, &parm_buf,
		    sizeof(parm_buf));
	}
	return (NULL);
}

static struct sctp_tcb *
sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
    struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
    uint16_t lport)
{
	/*
	 * Use my vtag to hash. If we find it we then verify the source addr
	 * is in the assoc. If all goes well we save a bit on rec of a packet.
	 */
	struct sctpasochead *head;
	struct sctp_nets *net;
	struct sctp_tcb *stcb;

	SCTP_INP_INFO_RLOCK();
	head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
	    sctppcbinfo.hashasocmark)];
	if (head == NULL) {
		/* invalid vtag */
		SCTP_INP_INFO_RUNLOCK();
		return (NULL);
	}
	LIST_FOREACH(stcb, head, sctp_asocs) {
		SCTP_INP_RLOCK(stcb->sctp_ep);
		SCTP_TCB_LOCK(stcb);
		SCTP_INP_RUNLOCK(stcb->sctp_ep);
		if (stcb->asoc.my_vtag == vtag) {
			/* candidate */
			if (stcb->rport != rport) {
				/*
				 * we could remove this if vtags are unique
				 * across the system.
				 */
				SCTP_TCB_UNLOCK(stcb);
				continue;
			}
			if (stcb->sctp_ep->sctp_lport != lport) {
				/*
				 * we could remove this if vtags are unique
				 * across the system.
				 */
				SCTP_TCB_UNLOCK(stcb);
				continue;
			}
			net = sctp_findnet(stcb, from);
			if (net) {
				/* yep its him. */
				*netp = net;
				sctp_pegs[SCTP_VTAG_EXPR]++;
				*inp_p = stcb->sctp_ep;
				SCTP_INP_INFO_RUNLOCK();
				return (stcb);
			} else {
 				/* not him, this should only
 				 * happen in rare cases so
 				 * I peg it.
  				 */
 				sctp_pegs[SCTP_VTAG_BOGUS]++;
			}
		}
		SCTP_TCB_UNLOCK(stcb);
	}
	SCTP_INP_INFO_RUNLOCK();
	return (NULL);
}

/*
 * Find an association with the pointer to the inbound IP packet. This
 * can be a IPv4 or IPv6 packet.
 */
struct sctp_tcb *
sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
    struct sctphdr *sh, struct sctp_chunkhdr *ch,
    struct sctp_inpcb **inp_p, struct sctp_nets **netp)
{
	int find_tcp_pool;
	struct ip *iph;
	struct sctp_tcb *retval;
	struct sockaddr_storage to_store, from_store;
	struct sockaddr *to = (struct sockaddr *)&to_store;
	struct sockaddr *from = (struct sockaddr *)&from_store;
	struct sctp_inpcb *inp;


	iph = mtod(m, struct ip *);
	if (iph->ip_v == IPVERSION) {
		/* its IPv4 */
		struct sockaddr_in *to4, *from4;

		to4 = (struct sockaddr_in *)&to_store;
		from4 = (struct sockaddr_in *)&from_store;
		memset(to4, 0, sizeof(*to4));
		memset(from4, 0, sizeof(*from4));
		from4->sin_family = to4->sin_family = AF_INET;
		from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
		from4->sin_addr.s_addr  = iph->ip_src.s_addr;
		to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
		from4->sin_port = sh->src_port;
		to4->sin_port = sh->dest_port;
	} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
		/* its IPv6 */
		struct ip6_hdr *ip6;
		struct sockaddr_in6 *to6, *from6;

		ip6 = mtod(m, struct ip6_hdr *);
		to6 = (struct sockaddr_in6 *)&to_store;
		from6 = (struct sockaddr_in6 *)&from_store;
		memset(to6, 0, sizeof(*to6));
		memset(from6, 0, sizeof(*from6));
		from6->sin6_family = to6->sin6_family = AF_INET6;
		from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
		from6->sin6_addr = ip6->ip6_src;
		to6->sin6_addr = ip6->ip6_dst;
		from6->sin6_port = sh->src_port;
		to6->sin6_port = sh->dest_port;
		/* Get the scopes in properly to the sin6 addr's */
#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__)
		/* We probably don't need this operation (jinmei@kame) */
		(void)in6_recoverscope(to6, &to6->sin6_addr, NULL);
		(void)in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);

		(void)in6_recoverscope(from6, &from6->sin6_addr, NULL);
		(void)in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
#endif
	} else {
		/* Currently not supported. */
		return (NULL);
	}
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Looking for port %d address :",
		       ntohs(((struct sockaddr_in *)to)->sin_port));
		sctp_print_address(to);
		printf("From for port %d address :",
		       ntohs(((struct sockaddr_in *)from)->sin_port));
		sctp_print_address(from);
	}
#endif

	if (sh->v_tag) {
		/* we only go down this path if vtag is non-zero */
		retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
		    inp_p, netp, sh->src_port, sh->dest_port);
		if (retval) {
			return (retval);
		}
	}
	find_tcp_pool = 0;
	if ((ch->chunk_type != SCTP_INITIATION) &&
	    (ch->chunk_type != SCTP_INITIATION_ACK) &&
	    (ch->chunk_type != SCTP_COOKIE_ACK) &&
	    (ch->chunk_type != SCTP_COOKIE_ECHO)) {
		/* Other chunk types go to the tcp pool. */
		find_tcp_pool = 1;
	}
	if (inp_p) {
		retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
		    find_tcp_pool);
		inp = *inp_p;
	} else {
		retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
		    find_tcp_pool);
	}
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("retval:%p inp:%p\n", retval, inp);
	}
#endif
	if (retval == NULL && inp) {
		/* Found a EP but not this address */
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB1) {
			printf("Found endpoint %p but no asoc - ep state:%x\n",
			    inp, inp->sctp_flags);
		}
#endif
		if ((ch->chunk_type == SCTP_INITIATION) ||
		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
			/*
			 * special hook, we do NOT return linp or an
			 * association that is linked to an existing
			 * association that is under the TCP pool (i.e. no
			 * listener exists). The endpoint finding routine
			 * will always find a listner before examining the
			 * TCP pool.
			 */
			if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
#ifdef SCTP_DEBUG
				if (sctp_debug_on & SCTP_DEBUG_PCB1) {
					printf("Gak, its in the TCP pool... return NULL");
				}
#endif
				if (inp_p) {
					*inp_p = NULL;
				}
				return (NULL);
			}
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB1) {
				printf("Now doing SPECIAL find\n");
			}
#endif
			retval = sctp_findassociation_special_addr(m, iphlen,
			    offset, sh, inp_p, netp, to);
		}
	}
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
	    printf("retval is %p\n", retval);
	}
#endif
	return (retval);
}

extern int sctp_max_burst_default;

extern unsigned int sctp_delayed_sack_time_default;
extern unsigned int sctp_heartbeat_interval_default;
extern unsigned int sctp_pmtu_raise_time_default;
extern unsigned int sctp_shutdown_guard_time_default;
extern unsigned int sctp_secret_lifetime_default;

extern unsigned int sctp_rto_max_default;
extern unsigned int sctp_rto_min_default;
extern unsigned int sctp_rto_initial_default;
extern unsigned int sctp_init_rto_max_default;
extern unsigned int sctp_valid_cookie_life_default;
extern unsigned int sctp_init_rtx_max_default;
extern unsigned int sctp_assoc_rtx_max_default;
extern unsigned int sctp_path_rtx_max_default;
extern unsigned int sctp_nr_outgoing_streams_default;

/*
 * allocate a sctp_inpcb and setup a temporary binding to a port/all
 * addresses. This way if we don't get a bind we by default pick a ephemeral
 * port with all addresses bound.
 */
int
sctp_inpcb_alloc(struct socket *so)
{
	/*
	 * we get called when a new endpoint starts up. We need to allocate
	 * the sctp_inpcb structure from the zone and init it. Mark it as
	 * unbound and find a port that we can use as an ephemeral with
	 * INADDR_ANY. If the user binds later no problem we can then add
	 * in the specific addresses. And setup the default parameters for
	 * the EP.
	 */
	int i, error;
	struct sctp_inpcb *inp;
#ifdef DEBUG
	struct sctp_inpcb *n_inp;
#endif
#ifdef IPSEC
	struct inpcbpolicy *pcb_sp = NULL;
#endif
	struct sctp_pcb *m;
	struct timeval time;

	error = 0;

        /* Hack alert:
	 *
	 * This code audits the entire INP list to see if
	 * any ep's that are in the GONE state are now
	 * all free. This should not happen really since when
	 * the last association if freed we should end up deleting
	 * the inpcb. This code including the locks should
	 * be taken out ... since the last set of fixes I
	 * have not seen the "Found a GONE on list" has not
	 * came out. But i am paranoid and we will leave this
	 * in at the cost of efficiency on allocation of PCB's.
	 * Probably we should move this to the invariant
	 * compile options
	 */
#ifdef DEBUG
	SCTP_INP_INFO_RLOCK();
	inp = LIST_FIRST(&sctppcbinfo.listhead);
	while (inp) {
		n_inp = LIST_NEXT(inp, sctp_list);
		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
			if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
				/* finish the job now */
				printf("Found a GONE on list\n");
				SCTP_INP_INFO_RUNLOCK();
				sctp_inpcb_free(inp, 1);
				SCTP_INP_INFO_RLOCK();
			}
		}
		inp = n_inp;
	}
	SCTP_INP_INFO_RUNLOCK();
#endif /* DEBUG */

	SCTP_INP_INFO_WLOCK();
	inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
	if (inp == NULL) {
		printf("Out of SCTP-INPCB structures - no resources\n");
		SCTP_INP_INFO_WUNLOCK();
		return (ENOBUFS);
	}

	/* zap it */
	memset(inp, 0, sizeof(*inp));

	/* setup socket pointers */
	inp->sctp_socket = so;

	/* setup inpcb socket too */
	inp->ip_inp.inp.inp_socket = so;
	inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
#ifdef IPSEC
	if (ipsec_enabled) {
		error = ipsec_init_pcbpolicy(so, &pcb_sp);
		if (error != 0) {
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
			SCTP_INP_INFO_WUNLOCK();
			return error;
		}
		/* Arrange to share the policy */
		inp->ip_inp.inp.inp_sp = pcb_sp;
		pcb_sp->sp_inph = (struct inpcb_hdr *)inp;
	}
#endif /* IPSEC */
	sctppcbinfo.ipi_count_ep++;
	inp->inp_ip_ttl = ip_defttl;
	inp->inp_ip_tos = 0;

	so->so_pcb = (void *)inp;

	if ((so->so_type == SOCK_DGRAM) ||
	    (so->so_type == SOCK_SEQPACKET)) {
		/* UDP style socket */
		inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
		    SCTP_PCB_FLAGS_UNBOUND);
		inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
		/* Be sure it is NON-BLOCKING IO for UDP */
		/*so->so_state |= SS_NBIO;*/
	} else if (so->so_type == SOCK_STREAM) {
		/* TCP style socket */
		inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
		    SCTP_PCB_FLAGS_UNBOUND);
		inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
		/* Be sure we have blocking IO bu default */
		so->so_state &= ~SS_NBIO;
	} else {
		/*
		 * unsupported socket type (RAW, etc)- in case we missed
		 * it in protosw
		 */
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
		SCTP_INP_INFO_WUNLOCK();
		return (EOPNOTSUPP);
	}
	inp->sctp_tcbhash = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_hash);
	if (inp->sctp_tcbhash == NULL) {
		printf("Out of SCTP-INPCB->hashinit - no resources\n");
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
		SCTP_INP_INFO_WUNLOCK();
		return (ENOBUFS);
	} else {
		for (i = 0; i < sctp_pcbtblsize; i++)
			LIST_INIT(&inp->sctp_tcbhash[i]);
		for (i = 1; i < sctp_pcbtblsize; i <<= 1)
			continue;
		inp->sctp_hashmark = i - 1;
	}
        /* LOCK init's */
	SCTP_INP_LOCK_INIT(inp);
	SCTP_ASOC_CREATE_LOCK_INIT(inp);
	/* lock the new ep */
	SCTP_INP_WLOCK(inp);

	/* add it to the info area */
	LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
	SCTP_INP_INFO_WUNLOCK();

	LIST_INIT(&inp->sctp_addr_list);
	LIST_INIT(&inp->sctp_asoc_list);
	TAILQ_INIT(&inp->sctp_queue_list);
	/* Init the timer structure for signature change */
	callout_init(&inp->sctp_ep.signature_change.timer, 0);
	inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;

	/* now init the actual endpoint default data */
	m = &inp->sctp_ep;

	/* setup the base timeout information */
	m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
	m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
	m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
	m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
	m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
	m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
	m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
	/* all max/min max are in ms */
	m->sctp_maxrto = sctp_rto_max_default;
	m->sctp_minrto = sctp_rto_min_default;
	m->initial_rto = sctp_rto_initial_default;
	m->initial_init_rto_max = sctp_init_rto_max_default;

	m->max_open_streams_intome = MAX_SCTP_STREAMS;

	m->max_init_times = sctp_init_rtx_max_default;
	m->max_send_times = sctp_assoc_rtx_max_default;
	m->def_net_failure = sctp_path_rtx_max_default;
	m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
	m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
	m->max_burst = sctp_max_burst_default;
	/* number of streams to pre-open on a association */
	m->pre_open_stream_count = sctp_nr_outgoing_streams_default;

	/* Add adaption cookie */
	m->adaption_layer_indicator = 0x504C5253;

	/* Minimum cookie size */
	m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
		sizeof(struct sctp_state_cookie);
	m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;

	/* Setup the initial secret */
	SCTP_GETTIME_TIMEVAL(&time);
	m->time_of_secret_change = time.tv_sec;

	for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
		m->secret_key[0][i] = sctp_select_initial_TSN(m);
	}
	sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);

	/* How long is a cookie good for ? */
	m->def_cookie_life = sctp_valid_cookie_life_default;
	SCTP_INP_WUNLOCK(inp);
	return (error);
}


void
sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
    struct sctp_tcb *stcb)
{
	uint16_t lport, rport;
	struct sctppcbhead *head;
	struct sctp_laddr *laddr, *oladdr;

	SCTP_TCB_UNLOCK(stcb);
	SCTP_INP_INFO_WLOCK();
	SCTP_INP_WLOCK(old_inp);
	SCTP_INP_WLOCK(new_inp);
	SCTP_TCB_LOCK(stcb);

	new_inp->sctp_ep.time_of_secret_change =
	    old_inp->sctp_ep.time_of_secret_change;
	memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
	    sizeof(old_inp->sctp_ep.secret_key));
	new_inp->sctp_ep.current_secret_number =
	    old_inp->sctp_ep.current_secret_number;
	new_inp->sctp_ep.last_secret_number =
	    old_inp->sctp_ep.last_secret_number;
	new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;

	/* Copy the port across */
	lport = new_inp->sctp_lport = old_inp->sctp_lport;
	rport = stcb->rport;
	/* Pull the tcb from the old association */
	LIST_REMOVE(stcb, sctp_tcbhash);
	LIST_REMOVE(stcb, sctp_tcblist);

	/* Now insert the new_inp into the TCP connected hash */
	head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
	    sctppcbinfo.hashtcpmark)];

	LIST_INSERT_HEAD(head, new_inp, sctp_hash);

	/* Now move the tcb into the endpoint list */
	LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
	/*
	 * Question, do we even need to worry about the ep-hash since
	 * we only have one connection? Probably not :> so lets
	 * get rid of it and not suck up any kernel memory in that.
	 */
	SCTP_INP_INFO_WUNLOCK();
	stcb->sctp_socket = new_inp->sctp_socket;
	stcb->sctp_ep = new_inp;
	if (new_inp->sctp_tcbhash != NULL) {
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_hash,
			      new_inp->sctp_tcbhash);
		new_inp->sctp_tcbhash = NULL;
	}
	if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
		/* Subset bound, so copy in the laddr list from the old_inp */
		LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
			laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
			    sctppcbinfo.ipi_zone_laddr);
			if (laddr == NULL) {
				/*
				 * Gak, what can we do? This assoc is really
				 * HOSED. We probably should send an abort
				 * here.
				 */
#ifdef SCTP_DEBUG
				if (sctp_debug_on & SCTP_DEBUG_PCB1) {
					printf("Association hosed in TCP model, out of laddr memory\n");
				}
#endif /* SCTP_DEBUG */
				continue;
			}
			sctppcbinfo.ipi_count_laddr++;
			sctppcbinfo.ipi_gencnt_laddr++;
			memset(laddr, 0, sizeof(*laddr));
			laddr->ifa = oladdr->ifa;
			LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
			    sctp_nxt_addr);
			new_inp->laddr_count++;
		}
	}
	SCTP_INP_WUNLOCK(new_inp);
	SCTP_INP_WUNLOCK(old_inp);
}

static int
sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
{
	struct sctppcbhead *head;
	struct sctp_inpcb *t_inp;

	head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
	    sctppcbinfo.hashmark)];
	LIST_FOREACH(t_inp, head, sctp_hash) {
		if (t_inp->sctp_lport != lport) {
			continue;
		}
		/* This one is in use. */
		/* check the v6/v4 binding issue */
		if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
		    (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)) {
			if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
				/* collision in V6 space */
				return (1);
			} else {
				/* inp is BOUND_V4 no conflict */
				continue;
			}
		} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
			/* t_inp is bound v4 and v6, conflict always */
			return (1);
		} else {
			/* t_inp is bound only V4 */
			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
			    (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
				) {
				/* no conflict */
				continue;
			}
			/* else fall through to conflict */
		}
		return (1);
	}
	return (0);
}

int
sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct lwp *l)
{
	/* bind a ep to a socket address */
	struct sctppcbhead *head;
	struct sctp_inpcb *inp, *inp_tmp;
	int bindall;
	uint16_t lport;
	int error;

	lport = 0;
	error = 0;
	bindall = 1;
	inp = (struct sctp_inpcb *)so->so_pcb;
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		if (addr) {
			printf("Bind called port:%d\n",
			       ntohs(((struct sockaddr_in *)addr)->sin_port));
			printf("Addr :");
			sctp_print_address(addr);
		}
	}
#endif /* SCTP_DEBUG */
	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
		/* already did a bind, subsequent binds NOT allowed ! */
		return (EINVAL);
	}

	if (addr != NULL) {
		if (addr->sa_family == AF_INET) {
			struct sockaddr_in *sin;

			/* IPV6_V6ONLY socket? */
			if (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY) {
				return (EINVAL);
			}

			if (addr->sa_len != sizeof(*sin))
				return (EINVAL);

			sin = (struct sockaddr_in *)addr;
			lport = sin->sin_port;

			if (sin->sin_addr.s_addr != INADDR_ANY) {
				bindall = 0;
			}
#ifdef IPSEC
			inp->ip_inp.inp.inp_af = AF_INET;
#endif
		} else if (addr->sa_family == AF_INET6) {
			/* Only for pure IPv6 Address. (No IPv4 Mapped!) */
			struct sockaddr_in6 *sin6;

			sin6 = (struct sockaddr_in6 *)addr;

			if (addr->sa_len != sizeof(*sin6))
				return (EINVAL);

			lport = sin6->sin6_port;
			if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
				bindall = 0;
				/* KAME hack: embed scopeid */
				error = sa6_embedscope(sin6, ip6_use_defzone);
				if (error != 0)
					return (error);
			}
#ifndef SCOPEDROUTING
			/* this must be cleared for ifa_ifwithaddr() */
			sin6->sin6_scope_id = 0;
#endif /* SCOPEDROUTING */
#ifdef IPSEC
			inp->ip_inp.inp.inp_af = AF_INET6;
#endif
		} else {
			return (EAFNOSUPPORT);
		}
#ifdef IPSEC
		if (ipsec_enabled) {
			inp->ip_inp.inp.inp_socket = so;
			error = ipsec_init_pcbpolicy(so, &inp->ip_inp.inp.inp_sp);
			if (error != 0)
				return (error);
			inp->ip_inp.inp.inp_sp->sp_inph = (struct inpcb_hdr *)inp;
		}
#endif
	}
	SCTP_INP_INFO_WLOCK();
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("sctp_inpcb_bind: after SCTP_INP_INFO_WLOCK\n");
	}
#endif /* SCTP_DEBUG */
	SCTP_INP_WLOCK(inp);
	/* increase our count due to the unlock we do */
	SCTP_INP_INCR_REF(inp);
	if (lport) {
		enum kauth_network_req req;
		/*
		 * Did the caller specify a port? if so we must see if a
		 * ep already has this one bound.
		 */
		if (ntohs(lport) < IPPORT_RESERVED)
			req = KAUTH_REQ_NETWORK_BIND_PRIVPORT;
		else
			req = KAUTH_REQ_NETWORK_BIND_PORT;

		error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_BIND,
		    req, so, addr, NULL);
		if (error) {
			SCTP_INP_DECR_REF(inp);
			SCTP_INP_WUNLOCK(inp);
			SCTP_INP_INFO_WUNLOCK();
			return (EACCES);
		}
		SCTP_INP_WUNLOCK(inp);
		inp_tmp = sctp_pcb_findep(addr, 0, 1);
		if (inp_tmp != NULL) {
			/* lock guy returned and lower count
			 * note that we are not bound so inp_tmp
			 * should NEVER be inp. And it is this
			 * inp (inp_tmp) that gets the reference
			 * bump, so we must lower it.
			 */
			SCTP_INP_WLOCK(inp_tmp);
			SCTP_INP_DECR_REF(inp_tmp);
			SCTP_INP_WUNLOCK(inp_tmp);

			/* unlock info */
			SCTP_INP_INFO_WUNLOCK();
			return EADDRINUSE;
		}
		SCTP_INP_WLOCK(inp);
		if (bindall) {
			/* verify that no lport is not used by a singleton */
			if (sctp_isport_inuse(inp, lport)) {
				/* Sorry someone already has this one bound */
				SCTP_INP_DECR_REF(inp);
				SCTP_INP_WUNLOCK(inp);
				SCTP_INP_INFO_WUNLOCK();
				return EADDRINUSE;
			}
		}
	} else {
		/*
		 * get any port but lets make sure no one has any address
		 * with this port bound
		 */

		/*
		 * setup the inp to the top (I could use the union but this
		 * is just as easy
		 */
		uint32_t port_guess;
		uint16_t port_attempt;
		int not_done=1;

		while (not_done) {
			port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
			port_attempt = (port_guess &  0x0000ffff);
			if (port_attempt == 0) {
				goto next_half;
			}
			if (port_attempt < IPPORT_RESERVED) {
				port_attempt += IPPORT_RESERVED;
			}

			if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
				/* got a port we can use */
				not_done = 0;
				continue;
			}
			/* try upper half */
		next_half:
			port_attempt = ((port_guess >> 16) &  0x0000ffff);
			if (port_attempt == 0) {
				goto last_try;
			}
			if (port_attempt < IPPORT_RESERVED) {
				port_attempt += IPPORT_RESERVED;
			}
			if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
				/* got a port we can use */
				not_done = 0;
				continue;
			}
			/* try two half's added together */
		last_try:
			port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
			if (port_attempt == 0) {
				/* get a new random number */
				continue;
			}
			if (port_attempt < IPPORT_RESERVED) {
				port_attempt += IPPORT_RESERVED;
			}
			if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
				/* got a port we can use */
				not_done = 0;
				continue;
			}
		}
		/* we don't get out of the loop until we have a port */
		lport = htons(port_attempt);
	}
	SCTP_INP_DECR_REF(inp);
	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
		/* this really should not happen. The guy
		 * did a non-blocking bind and then did a close
		 * at the same time.
		 */
		SCTP_INP_WUNLOCK(inp);
		SCTP_INP_INFO_WUNLOCK();
		return (EINVAL);
	}
	/* ok we look clear to give out this port, so lets setup the binding */
	if (bindall) {
		/* binding to all addresses, so just set in the proper flags */
		inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
		    SCTP_PCB_FLAGS_DO_ASCONF);
		/* set the automatic addr changes from kernel flag */
		if (sctp_auto_asconf == 0) {
			inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
		} else {
			inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
		}
	} else {
		/*
		 * bind specific, make sure flags is off and add a new address
		 * structure to the sctp_addr_list inside the ep structure.
		 *
		 * We will need to allocate one and insert it at the head.
		 * The socketopt call can just insert new addresses in there
		 * as well. It will also have to do the embed scope kame hack
		 * too (before adding).
		 */
		struct ifaddr *ifa;
		struct sockaddr_storage store_sa;

		memset(&store_sa, 0, sizeof(store_sa));
		if (addr->sa_family == AF_INET) {
			struct sockaddr_in *sin;

			sin = (struct sockaddr_in *)&store_sa;
			memcpy(sin, addr, sizeof(struct sockaddr_in));
			sin->sin_port = 0;
		} else if (addr->sa_family == AF_INET6) {
			struct sockaddr_in6 *sin6;

			sin6 = (struct sockaddr_in6 *)&store_sa;
			memcpy(sin6, addr, sizeof(struct sockaddr_in6));
			sin6->sin6_port = 0;
		}
		/*
		 * first find the interface with the bound address
		 * need to zero out the port to find the address! yuck!
		 * can't do this earlier since need port for sctp_pcb_findep()
		 */
		ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
		if (ifa == NULL) {
			/* Can't find an interface with that address */
			SCTP_INP_WUNLOCK(inp);
			SCTP_INP_INFO_WUNLOCK();
			return (EADDRNOTAVAIL);
		}
		if (addr->sa_family == AF_INET6) {
			struct in6_ifaddr *ifa6;
			ifa6 = (struct in6_ifaddr *)ifa;
			/*
			 * allow binding of deprecated addresses as per
			 * RFC 2462 and ipng discussion
			 */
			if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
			    IN6_IFF_ANYCAST |
			    IN6_IFF_NOTREADY)) {
				/* Can't bind a non-existent addr. */
				SCTP_INP_WUNLOCK(inp);
				SCTP_INP_INFO_WUNLOCK();
				return (EINVAL);
			}
		}
		/* we're not bound all */
		inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
#if 0 /* use sysctl now */
		/* don't allow automatic addr changes from kernel */
		inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
#endif
		/* set the automatic addr changes from kernel flag */
		if (sctp_auto_asconf == 0) {
			inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
		} else {
			inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
		}
		/* allow bindx() to send ASCONF's for binding changes */
		inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
		/* add this address to the endpoint list */
		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
		if (error != 0) {
			SCTP_INP_WUNLOCK(inp);
			SCTP_INP_INFO_WUNLOCK();
			return (error);
		}
		inp->laddr_count++;
	}
	/* find the bucket */
	head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
	    sctppcbinfo.hashmark)];
	/* put it in the bucket */
	LIST_INSERT_HEAD(head, inp, sctp_hash);
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
	}
#endif
	/* set in the port */
	inp->sctp_lport = lport;

	/* turn off just the unbound flag */
	inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
	SCTP_INP_WUNLOCK(inp);
	SCTP_INP_INFO_WUNLOCK();
	return (0);
}


static void
sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
{
	struct sctp_iterator *it;
	/* We enter with the only the ITERATOR_LOCK in place and
	 * A write lock on the inp_info stuff.
	 */

	/* Go through all iterators, we must do this since
	 * it is possible that some iterator does NOT have
	 * the lock, but is waiting for it. And the one that
	 * had the lock has either moved in the last iteration
	 * or we just cleared it above. We need to find all
	 * of those guys. The list of iterators should never
	 * be very big though.
	 */
 	LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
		if (it == inp->inp_starting_point_for_iterator)
			/* skip this guy, he's special */
			continue;
 		if (it->inp == inp) {
			/* This is tricky and we DON'T lock the iterator.
			 * Reason is he's running but waiting for me since
			 * inp->inp_starting_point_for_iterator has the lock
			 * on me (the guy above we skipped). This tells us
			 * its is not running but waiting for inp->inp_starting_point_for_iterator
			 * to be released by the guy that does have our INP in a lock.
			 */
			if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
				it->inp = NULL;
				it->stcb = NULL;
			} else {
				/* set him up to do the next guy not me */
				it->inp = inp_next;
				it->stcb = NULL;
			}
		}
	}
	it = inp->inp_starting_point_for_iterator;
	if (it) {
		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
			it->inp = NULL;
		} else {
			it->inp = inp_next;
		}
		it->stcb = NULL;
	}
}

/* release sctp_inpcb unbind the port */
void
sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
{
	/*
	 * Here we free a endpoint. We must find it (if it is in the Hash
	 * table) and remove it from there. Then we must also find it in
	 * the overall list and remove it from there. After all removals are
	 * complete then any timer has to be stopped. Then start the actual
	 * freeing.
	 * a) Any local lists.
	 * b) Any associations.
	 * c) The hash of all associations.
	 * d) finally the ep itself.
	 */
	struct sctp_inpcb *inp_save;
	struct sctp_tcb *asoc, *nasoc;
	struct sctp_laddr *laddr, *nladdr;
	struct inpcb *ip_pcb;
	struct socket *so;
	struct sctp_socket_q_list *sq;
	int s, cnt;
	struct rtentry *rt;

	s = splsoftnet();
	SCTP_ASOC_CREATE_LOCK(inp);
	SCTP_INP_WLOCK(inp);

	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
		/* been here before */
		splx(s);
		printf("Endpoint was all gone (dup free)?\n");
		SCTP_INP_WUNLOCK(inp);
		SCTP_ASOC_CREATE_UNLOCK(inp);
		return;
	}
	sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);

	sctp_m_freem(inp->control);
	inp->control = NULL;
	sctp_m_freem(inp->pkt);
	inp->pkt = NULL;
	so = inp->sctp_socket;
	ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
				   * pointer here but I will
				   * be nice :> (i.e. ip_pcb = ep;)
				   */

	if (immediate == 0) {
		int cnt_in_sd;
		cnt_in_sd = 0;
		for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
		     asoc = nasoc) {
			nasoc = LIST_NEXT(asoc, sctp_tcblist);
			if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
			    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
				/* Just abandon things in the front states */
				SCTP_TCB_LOCK(asoc);
				SCTP_INP_WUNLOCK(inp);
				sctp_free_assoc(inp, asoc);
				SCTP_INP_WLOCK(inp);
				continue;
			} else {
				asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
			}
			if ((asoc->asoc.size_on_delivery_queue  > 0) ||
			    (asoc->asoc.size_on_reasm_queue > 0) ||
			    (asoc->asoc.size_on_all_streams > 0) ||
			    (so && (so->so_rcv.sb_cc > 0))
				) {
				/* Left with Data unread */
				struct mbuf *op_err;
				MGET(op_err, M_DONTWAIT, MT_DATA);
				if (op_err) {
					/* Fill in the user initiated abort */
					struct sctp_paramhdr *ph;
					op_err->m_len =
					    sizeof(struct sctp_paramhdr);
					ph = mtod(op_err,
					    struct sctp_paramhdr *);
					ph->param_type = htons(
					    SCTP_CAUSE_USER_INITIATED_ABT);
					ph->param_length = htons(op_err->m_len);
				}
				SCTP_TCB_LOCK(asoc);
				sctp_send_abort_tcb(asoc, op_err);

				SCTP_INP_WUNLOCK(inp);
				sctp_free_assoc(inp, asoc);
				SCTP_INP_WLOCK(inp);
				continue;
			} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
			    TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
				if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
				    (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
					/* there is nothing queued to send, so I send shutdown */
					SCTP_TCB_LOCK(asoc);
					sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
					asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
							 asoc->asoc.primary_destination);
					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
							 asoc->asoc.primary_destination);
					sctp_chunk_output(inp, asoc, 1);
					SCTP_TCB_UNLOCK(asoc);
				}
			} else {
				/* mark into shutdown pending */
				asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
			}
			cnt_in_sd++;
		}
		/* now is there some left in our SHUTDOWN state? */
		if (cnt_in_sd) {
			inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
			splx(s);
			SCTP_INP_WUNLOCK(inp);
			SCTP_ASOC_CREATE_UNLOCK(inp);
			return;
		}
	}
#if defined(__FreeBSD__) && __FreeBSD_version >= 503000
	if (inp->refcount) {
		sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
		SCTP_INP_WUNLOCK(inp);
		SCTP_ASOC_CREATE_UNLOCK(inp);
		return;
	}
#endif
	inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;

	/* XXX */
	rt = rtcache_validate(&ip_pcb->inp_route);
	rtcache_unref(rt, &ip_pcb->inp_route);

	callout_stop(&inp->sctp_ep.signature_change.timer);
	callout_destroy(&inp->sctp_ep.signature_change.timer);

	if (so) {
	/* First take care of socket level things */
#ifdef IPSEC
		if (ipsec_enabled)
			ipsec_delete_pcbpolicy(ip_pcb);
#endif /*IPSEC*/
		so->so_pcb = 0;
	}

	if (ip_pcb->inp_options) {
		(void)m_free(ip_pcb->inp_options);
		ip_pcb->inp_options = 0;
	}
	rtcache_free(&ip_pcb->inp_route);
	if (ip_pcb->inp_moptions) {
		ip_freemoptions(ip_pcb->inp_moptions);
		ip_pcb->inp_moptions = 0;
	}
	inp->inp_vflag = 0;

	/* Now the sctp_pcb things */
	/*
	 * free each asoc if it is not already closed/free. we can't use
	 * the macro here since le_next will get freed as part of the
	 * sctp_free_assoc() call.
	 */
	cnt = 0;
	for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
	     asoc = nasoc) {
		nasoc = LIST_NEXT(asoc, sctp_tcblist);
		SCTP_TCB_LOCK(asoc);
		if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
			struct mbuf *op_err;
			MGET(op_err, M_DONTWAIT, MT_DATA);
			if (op_err) {
				/* Fill in the user initiated abort */
				struct sctp_paramhdr *ph;
				op_err->m_len = sizeof(struct sctp_paramhdr);
				ph = mtod(op_err, struct sctp_paramhdr *);
				ph->param_type = htons(
				    SCTP_CAUSE_USER_INITIATED_ABT);
				ph->param_length = htons(op_err->m_len);
			}
			sctp_send_abort_tcb(asoc, op_err);
		}
		cnt++;
		/*
		 * sctp_free_assoc() will call sctp_inpcb_free(),
		 * if SCTP_PCB_FLAGS_SOCKET_GONE set.
		 * So, we clear it before sctp_free_assoc() making sure
		 * no double sctp_inpcb_free().
		 */
		inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
		SCTP_INP_WUNLOCK(inp);
		sctp_free_assoc(inp, asoc);
		SCTP_INP_WLOCK(inp);
	}
	while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
		TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
		sctppcbinfo.ipi_count_sockq--;
		sctppcbinfo.ipi_gencnt_sockq++;
	}
	inp->sctp_socket = 0;
	/* Now first we remove ourselves from the overall list of all EP's */

	/* Unlock inp first, need correct order */
	SCTP_INP_WUNLOCK(inp);
	/* now iterator lock */
	SCTP_ITERATOR_LOCK();
	/* now info lock */
	SCTP_INP_INFO_WLOCK();
	/* now reget the inp lock */
	SCTP_INP_WLOCK(inp);

	inp_save = LIST_NEXT(inp, sctp_list);
	LIST_REMOVE(inp, sctp_list);
	/*
	 * Now the question comes as to if this EP was ever bound at all.
	 * If it was, then we must pull it out of the EP hash list.
	 */
	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
	    SCTP_PCB_FLAGS_UNBOUND) {
		/*
		 * ok, this guy has been bound. It's port is somewhere
		 * in the sctppcbinfo hash table. Remove it!
		 */
		LIST_REMOVE(inp, sctp_hash);
	}
        /* fix any iterators only after out of the list */
	sctp_iterator_inp_being_freed(inp, inp_save);
	SCTP_ITERATOR_UNLOCK();
	/*
	 * if we have an address list the following will free the list of
	 * ifaddr's that are set into this ep. Again macro limitations here,
	 * since the LIST_FOREACH could be a bad idea.
	 */
	for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
	     laddr = nladdr) {
		nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
		LIST_REMOVE(laddr, sctp_nxt_addr);
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
		sctppcbinfo.ipi_gencnt_laddr++;
		sctppcbinfo.ipi_count_laddr--;
	}

	/* Now lets see about freeing the EP hash table. */
	if (inp->sctp_tcbhash != NULL) {
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_hash, inp->sctp_tcbhash);
		inp->sctp_tcbhash = NULL;
	}
	SCTP_INP_WUNLOCK(inp);
	SCTP_ASOC_CREATE_UNLOCK(inp);
	SCTP_INP_LOCK_DESTROY(inp);
	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);

	/* Now we must put the ep memory back into the zone pool */
	SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
	sctppcbinfo.ipi_count_ep--;

	SCTP_INP_INFO_WUNLOCK();
	splx(s);

	sofree(so);
	mutex_enter(softnet_lock);
}


struct sctp_nets *
sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
{
	struct sctp_nets *net;

	/* use the peer's/remote port for lookup if unspecified */
#if 0 /* why do we need to check the port for a nets list on an assoc? */
	if (stcb->rport != sin->sin_port) {
		/* we cheat and just a sin for this test */
		return (NULL);
	}
#endif
	/* locate the address */
	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
		if (sctp_cmpaddr(addr, rtcache_getdst(&net->ro)))
			return (net);
	}
	return (NULL);
}


/*
 * add's a remote endpoint address, done with the INIT/INIT-ACK
 * as well as when a ASCONF arrives that adds it. It will also
 * initialize all the cwnd stats of stuff.
 */
int
sctp_is_address_on_local_host(struct sockaddr *addr)
{
	struct ifnet *ifn;
	struct ifaddr *ifa;
	int s;

	s = pserialize_read_enter();
	IFNET_READER_FOREACH(ifn) {
		IFADDR_READER_FOREACH(ifa, ifn) {
			if (addr->sa_family == ifa->ifa_addr->sa_family) {
				/* same family */
				if (addr->sa_family == AF_INET) {
					struct sockaddr_in *sin, *sin_c;
					sin = (struct sockaddr_in *)addr;
					sin_c = (struct sockaddr_in *)
					    ifa->ifa_addr;
					if (sin->sin_addr.s_addr ==
					    sin_c->sin_addr.s_addr) {
						/* we are on the same machine */
						pserialize_read_exit(s);
						return (1);
					}
				} else if (addr->sa_family == AF_INET6) {
					struct sockaddr_in6 *sin6, *sin_c6;
					sin6 = (struct sockaddr_in6 *)addr;
					sin_c6 = (struct sockaddr_in6 *)
					    ifa->ifa_addr;
					if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
					    &sin_c6->sin6_addr)) {
						/* we are on the same machine */
						pserialize_read_exit(s);
						return (1);
					}
				}
			}
		}
	}
	pserialize_read_exit(s);

	return (0);
}

int
sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
    int set_scope, int from)
{
	/*
	 * The following is redundant to the same lines in the
	 * sctp_aloc_assoc() but is needed since other's call the add
	 * address function
	 */
	struct sctp_nets *net, *netfirst;
	struct rtentry *rt, *netfirst_rt;
	int addr_inscope;

#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Adding an address (from:%d) to the peer: ", from);
		sctp_print_address(newaddr);
	}
#endif
	netfirst = sctp_findnet(stcb, newaddr);
	if (netfirst) {
		/*
		 * Lie and return ok, we don't want to make the association
		 * go away for this behavior. It will happen in the TCP model
		 * in a connected socket. It does not reach the hash table
		 * until after the association is built so it can't be found.
		 * Mark as reachable, since the initial creation will have
		 * been cleared and the NOT_IN_ASSOC flag will have been
		 * added... and we don't want to end up removing it back out.
		 */
		if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
			netfirst->dest_state = (SCTP_ADDR_REACHABLE|
			    SCTP_ADDR_UNCONFIRMED);
		} else {
			netfirst->dest_state = SCTP_ADDR_REACHABLE;
		}

		return (0);
	}
	addr_inscope = 1;
	if (newaddr->sa_family == AF_INET) {
		struct sockaddr_in *sin;
		sin = (struct sockaddr_in *)newaddr;
		if (sin->sin_addr.s_addr == 0) {
			/* Invalid address */
			return (-1);
		}
		/* zero out the bzero area */
		memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));

		/* assure len is set */
		sin->sin_len = sizeof(struct sockaddr_in);
		if (set_scope) {
#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
			stcb->ipv4_local_scope = 1;
#else
			if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
				stcb->asoc.ipv4_local_scope = 1;
			}
#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */

			if (sctp_is_address_on_local_host(newaddr)) {
				stcb->asoc.loopback_scope = 1;
				stcb->asoc.ipv4_local_scope = 1;
				stcb->asoc.local_scope = 1;
				stcb->asoc.site_scope = 1;
			}
		} else {
			if (from == 8) {
				/* From connectx */
				if (sctp_is_address_on_local_host(newaddr)) {
					stcb->asoc.loopback_scope = 1;
					stcb->asoc.ipv4_local_scope = 1;
					stcb->asoc.local_scope = 1;
					stcb->asoc.site_scope = 1;
				}
			}
			/* Validate the address is in scope */
			if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
			    (stcb->asoc.ipv4_local_scope == 0)) {
				addr_inscope = 0;
			}
		}
	} else if (newaddr->sa_family == AF_INET6) {
		struct sockaddr_in6 *sin6;
		sin6 = (struct sockaddr_in6 *)newaddr;
		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
			/* Invalid address */
			return (-1);
		}
		/* assure len is set */
		sin6->sin6_len = sizeof(struct sockaddr_in6);
		if (set_scope) {
			if (sctp_is_address_on_local_host(newaddr)) {
				stcb->asoc.loopback_scope = 1;
				stcb->asoc.local_scope = 1;
				stcb->asoc.ipv4_local_scope = 1;
				stcb->asoc.site_scope = 1;
			} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
				/*
				 * If the new destination is a LINK_LOCAL
				 * we must have common site scope. Don't set
				 * the local scope since we may not share all
				 * links, only loopback can do this.
 				 * Links on the local network would also
 				 * be on our private network for v4 too.
				 */
 				stcb->asoc.ipv4_local_scope = 1;
				stcb->asoc.site_scope = 1;
			} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
				/*
				 * If the new destination is SITE_LOCAL
				 * then we must have site scope in common.
				 */
				stcb->asoc.site_scope = 1;
			}
		} else {
			if (from == 8) {
				/* From connectx */
				if (sctp_is_address_on_local_host(newaddr)) {
					stcb->asoc.loopback_scope = 1;
					stcb->asoc.ipv4_local_scope = 1;
					stcb->asoc.local_scope = 1;
					stcb->asoc.site_scope = 1;
				}
			}
			/* Validate the address is in scope */
			if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
			    (stcb->asoc.loopback_scope == 0)) {
				addr_inscope = 0;
			} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
				   (stcb->asoc.local_scope == 0)) {
				addr_inscope = 0;
			} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
				   (stcb->asoc.site_scope == 0)) {
				addr_inscope = 0;
			}
		}
	} else {
		/* not supported family type */
		return (-1);
	}
	net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
	if (net == NULL) {
		return (-1);
	}
	sctppcbinfo.ipi_count_raddr++;
	sctppcbinfo.ipi_gencnt_raddr++;
	memset(net, 0, sizeof(*net));
	if (newaddr->sa_family == AF_INET) {
		((struct sockaddr_in *)newaddr)->sin_port = stcb->rport;
	} else if (newaddr->sa_family == AF_INET6) {
		((struct sockaddr_in6 *)newaddr)->sin6_port = stcb->rport;
	}
	net->addr_is_local = sctp_is_address_on_local_host(newaddr);
	net->failure_threshold = stcb->asoc.def_net_failure;
	if (addr_inscope == 0) {
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB1) {
			printf("Adding an address which is OUT OF SCOPE\n");
		}
#endif /* SCTP_DEBUG */
		net->dest_state = (SCTP_ADDR_REACHABLE |
		    SCTP_ADDR_OUT_OF_SCOPE);
	} else {
		if (from == 8)
			/* 8 is passed by connect_x */
			net->dest_state = SCTP_ADDR_REACHABLE;
		else
			net->dest_state = SCTP_ADDR_REACHABLE |
			    SCTP_ADDR_UNCONFIRMED;
	}
	net->RTO = stcb->asoc.initial_rto;
	stcb->asoc.numnets++;
	net->ref_count = 1;

	/* Init the timer structure */
	callout_init(&net->rxt_timer.timer, 0);
	callout_init(&net->pmtu_timer.timer, 0);

	/* Now generate a route for this guy */
	/* KAME hack: embed scope zone ID */
	if (newaddr->sa_family == AF_INET6) {
		struct sockaddr_in6 *sin6;
		sin6 = (struct sockaddr_in6 *)newaddr;
		if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
			return (-1);
	}
	rt = rtcache_lookup(&net->ro, newaddr);
	if (rt) {
		net->mtu = rt->rt_ifp->if_mtu;
		if (from == 1) {
			stcb->asoc.smallest_mtu = net->mtu;
		}
		/* start things off to match mtu of interface please. */
		rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu;
	} else {
		net->mtu = stcb->asoc.smallest_mtu;
	}
#ifdef SCTP_DEBUG
	printf("After lookup\n");
#endif
	if (stcb->asoc.smallest_mtu > net->mtu) {
		stcb->asoc.smallest_mtu = net->mtu;
	}
	/* We take the max of the burst limit times a MTU or the INITIAL_CWND.
	 * We then limit this to 4 MTU's of sending.
	 */
 	net->cwnd = uimin((net->mtu * 4), uimax((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));

	/* we always get at LEAST 2 MTU's */
	if (net->cwnd < (2 * net->mtu)) {
		net->cwnd = 2 * net->mtu;
	}

	net->ssthresh = stcb->asoc.peers_rwnd;

	net->src_addr_selected = 0;
	netfirst = TAILQ_FIRST(&stcb->asoc.nets);
	if (rt == NULL) {
		/* Since we have no route put it at the back */
		TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
	} else if (netfirst == NULL) {
		/* We are the first one in the pool. */
		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
	} else if ((netfirst_rt = rtcache_validate(&netfirst->ro)) == NULL) {
		/*
		 * First one has NO route. Place this one ahead of the
		 * first one.
		 */
		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
	} else if (rt->rt_ifp != netfirst_rt->rt_ifp) {
		rtcache_unref(netfirst_rt, &netfirst->ro);
		/*
		 * This one has a different interface than the one at the
		 * top of the list. Place it ahead.
		 */
		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
	} else {
		/*
		 * Ok we have the same interface as the first one. Move
		 * forward until we find either
		 *   a) one with a NULL route... insert ahead of that
		 *   b) one with a different ifp.. insert after that.
		 *   c) end of the list.. insert at the tail.
		 */
		struct sctp_nets *netlook;
		struct rtentry *netlook_rt;
		do {
			netlook = TAILQ_NEXT(netfirst, sctp_next);
			if (netlook == NULL) {
				/* End of the list */
				TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
				    sctp_next);
				break;
			} else if ((netlook_rt = rtcache_validate(&netlook->ro)) == NULL) {
				/* next one has NO route */
				TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
				break;
			} else if (netlook_rt->rt_ifp != rt->rt_ifp) {
				rtcache_unref(netlook_rt, &netlook->ro);
				TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
				    net, sctp_next);
				break;
			}
			rtcache_unref(netlook_rt, &netlook->ro);
			/* Shift forward */
			netfirst = netlook;
		} while (netlook != NULL);
		rtcache_unref(netfirst_rt, &netfirst->ro);
	}
	/* got to have a primary set */
	if (stcb->asoc.primary_destination == 0) {
		stcb->asoc.primary_destination = net;
	} else if (!rtcache_validate(&stcb->asoc.primary_destination->ro)) {
		/* No route to current primary adopt new primary */
		stcb->asoc.primary_destination = net;
	}
	sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
	    net);

	return (0);
}


/*
 * allocate an association and add it to the endpoint. The caller must
 * be careful to add all additional addresses once they are know right
 * away or else the assoc will be may experience a blackout scenario.
 */
struct sctp_tcb *
sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
    int for_a_init, int *error,  uint32_t override_tag)
{
	struct sctp_tcb *stcb;
	struct sctp_association *asoc;
	struct sctpasochead *head;
	uint16_t rport;
	int err;

	/*
	 * Assumption made here:
	 *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
	 *  to make sure the address does not exist already.
	 */
	if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
		/* Hit max assoc, sorry no more */
		*error = ENOBUFS;
		return (NULL);
	}
	SCTP_INP_RLOCK(inp);
	if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
		/*
		 * If its in the TCP pool, its NOT allowed to create an
		 * association. The parent listener needs to call
		 * sctp_aloc_assoc.. or the one-2-many socket. If a
		 * peeled off, or connected one does this.. its an error.
		 */
		SCTP_INP_RUNLOCK(inp);
		*error = EINVAL;
		return (NULL);
 	}

#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB3) {
		printf("Allocate an association for peer:");
		if (firstaddr)
			sctp_print_address(firstaddr);
		else
			printf("None\n");
		printf("Port:%d\n",
		       ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
	}
#endif /* SCTP_DEBUG */
	if (firstaddr->sa_family == AF_INET) {
		struct sockaddr_in *sin;
		sin = (struct sockaddr_in *)firstaddr;
		if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
			/* Invalid address */
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB3) {
				printf("peer address invalid\n");
			}
#endif
			SCTP_INP_RUNLOCK(inp);
			*error = EINVAL;
			return (NULL);
		}
		rport = sin->sin_port;
	} else if (firstaddr->sa_family == AF_INET6) {
		struct sockaddr_in6 *sin6;
		sin6 = (struct sockaddr_in6 *)firstaddr;
		if ((sin6->sin6_port == 0) ||
		    (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
			/* Invalid address */
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB3) {
				printf("peer address invalid\n");
			}
#endif
			SCTP_INP_RUNLOCK(inp);
			*error = EINVAL;
			return (NULL);
		}
		rport = sin6->sin6_port;
	} else {
		/* not supported family type */
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB3) {
			printf("BAD family %d\n", firstaddr->sa_family);
		}
#endif
		SCTP_INP_RUNLOCK(inp);
		*error = EINVAL;
		return (NULL);
	}
	SCTP_INP_RUNLOCK(inp);
	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
		/*
		 * If you have not performed a bind, then we need to do
		 * the ephemerial bind for you.
		 */
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB3) {
			printf("Doing implicit BIND\n");
		}
#endif

		if ((err = sctp_inpcb_bind(inp->sctp_socket,
		    (struct sockaddr *)NULL, (struct lwp *)NULL))){
			/* bind error, probably perm */
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB3) {
				printf("BIND FAILS ret:%d\n", err);
			}
#endif

			*error = err;
			return (NULL);
		}
	}
	stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
	if (stcb == NULL) {
		/* out of memory? */
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB3) {
			printf("aloc_assoc: no assoc mem left, stcb=NULL\n");
		}
#endif
		*error = ENOMEM;
		return (NULL);
	}
	sctppcbinfo.ipi_count_asoc++;
	sctppcbinfo.ipi_gencnt_asoc++;

	memset(stcb, 0, sizeof(*stcb));
	asoc = &stcb->asoc;
	SCTP_TCB_LOCK_INIT(stcb);
	/* setup back pointers */
#ifdef SCTP_DEBUG
	printf("Before back pointers\n");
#endif
	stcb->sctp_ep = inp;
	stcb->sctp_socket = inp->sctp_socket;
	if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
		/* failed */
		SCTP_TCB_LOCK_DESTROY (stcb);
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
		sctppcbinfo.ipi_count_asoc--;
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB3) {
			printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
		}
#endif
		*error = err;
		return (NULL);
	}
	/* and the port */
	stcb->rport = rport;
	SCTP_INP_INFO_WLOCK();
	SCTP_INP_WLOCK(inp);
	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
		/* inpcb freed while alloc going on */
		SCTP_TCB_LOCK_DESTROY (stcb);
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
		SCTP_INP_WUNLOCK(inp);
		SCTP_INP_INFO_WUNLOCK();
		sctppcbinfo.ipi_count_asoc--;
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB3) {
			printf("aloc_assoc: couldn't init asoc, out of mem?!\n");
		}
#endif
		*error = EINVAL;
		return (NULL);
	}
	SCTP_TCB_LOCK(stcb);

	/* now that my_vtag is set, add it to the  hash */
	head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
	     sctppcbinfo.hashasocmark)];
	/* put it in the bucket in the vtag hash of assoc's for the system */
	LIST_INSERT_HEAD(head, stcb, sctp_asocs);
	SCTP_INP_INFO_WUNLOCK();


	if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
		/* failure.. memory error? */
		if (asoc->strmout)
			free(asoc->strmout, M_PCB);
		if (asoc->mapping_array)
			free(asoc->mapping_array, M_PCB);

		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
		sctppcbinfo.ipi_count_asoc--;
#ifdef SCTP_DEBUG
		if (sctp_debug_on & SCTP_DEBUG_PCB3) {
			printf("aloc_assoc: couldn't add remote addr!\n");
		}
#endif
		SCTP_TCB_LOCK_DESTROY (stcb);
		*error = ENOBUFS;
		return (NULL);
	}
	/* Init all the timers */
	callout_init(&asoc->hb_timer.timer, 0);
	callout_init(&asoc->dack_timer.timer, 0);
	callout_init(&asoc->asconf_timer.timer, 0);
	callout_init(&asoc->shut_guard_timer.timer, 0);
	callout_init(&asoc->autoclose_timer.timer, 0);
	callout_init(&asoc->delayed_event_timer.timer, 0);
	LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
	/* now file the port under the hash as well */
#ifdef SCTP_DEBUG
	printf("Before hashing %ld size %d\n",
		inp->sctp_hashmark, sctp_pcbtblsize);
#endif
	if (inp->sctp_tcbhash != NULL) {
		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
		   inp->sctp_hashmark)];
		LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
	}
#ifdef SCTP_DEBUG
	printf("After hashing\n");
#endif
	SCTP_INP_WUNLOCK(inp);
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		printf("Association %p now allocated\n", stcb);
	}
#endif
	return (stcb);
}

void
sctp_free_remote_addr(struct sctp_nets *net)
{
	if (net == NULL)
		return;
	net->ref_count--;
	if (net->ref_count <= 0) {
		/* stop timer if running */
		callout_stop(&net->rxt_timer.timer);
		callout_stop(&net->pmtu_timer.timer);
		callout_destroy(&net->rxt_timer.timer);
		callout_destroy(&net->pmtu_timer.timer);
		net->dest_state = SCTP_ADDR_NOT_REACHABLE;
		rtcache_free(&net->ro);
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
		sctppcbinfo.ipi_count_raddr--;
	}
}

/*
 * remove a remote endpoint address from an association, it
 * will fail if the address does not exist.
 */
int
sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
{
	/*
	 * Here we need to remove a remote address. This is quite simple, we
	 * first find it in the list of address for the association
	 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
	 * that item.
	 * Note we do not allow it to be removed if there are no other
	 * addresses.
	 */
	struct sctp_association *asoc;
	struct sctp_nets *net, *net_tmp;
	asoc = &stcb->asoc;
	if (asoc->numnets < 2) {
		/* Must have at LEAST two remote addresses */
		return (-1);
	}
	/* locate the address */
	for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
		net_tmp = TAILQ_NEXT(net, sctp_next);
		if (rtcache_getdst(&net->ro)->sa_family != remaddr->sa_family) {
			continue;
		}
		if (sctp_cmpaddr(rtcache_getdst(&net->ro), remaddr)) {
			/* we found the guy */
			asoc->numnets--;
			TAILQ_REMOVE(&asoc->nets, net, sctp_next);
			sctp_free_remote_addr(net);
			if (net == asoc->primary_destination) {
				/* Reset primary */
				struct sctp_nets *lnet;
				lnet = TAILQ_FIRST(&asoc->nets);
				/* Try to find a confirmed primary */
				asoc->primary_destination =
				    sctp_find_alternate_net(stcb, lnet);
			}
			if (net == asoc->last_data_chunk_from) {
				/* Reset primary */
				asoc->last_data_chunk_from =
				    TAILQ_FIRST(&asoc->nets);
			}
			if (net == asoc->last_control_chunk_from) {
				/* Reset primary */
				asoc->last_control_chunk_from =
				    TAILQ_FIRST(&asoc->nets);
			}
			if (net == asoc->asconf_last_sent_to) {
				/* Reset primary */
				asoc->asconf_last_sent_to =
				    TAILQ_FIRST(&asoc->nets);
			}
			return (0);
		}
	}
	/* not found. */
	return (-2);
}


static void
sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
{
	struct sctpvtaghead *chain;
	struct sctp_tagblock *twait_block;
	struct timeval now;
	int set, i;
	SCTP_GETTIME_TIMEVAL(&now);
	chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
	set = 0;
	if (!LIST_EMPTY(chain)) {
		/* Block(s) present, lets find space, and expire on the fly */
		LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
			for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
				if ((twait_block->vtag_block[i].v_tag == 0) &&
				    !set) {
					twait_block->vtag_block[0].tv_sec_at_expire =
					    now.tv_sec + SCTP_TIME_WAIT;
					twait_block->vtag_block[0].v_tag = tag;
					set = 1;
				} else if ((twait_block->vtag_block[i].v_tag) &&
				    ((long)twait_block->vtag_block[i].tv_sec_at_expire >
				    now.tv_sec)) {
					/* Audit expires this guy */
					twait_block->vtag_block[i].tv_sec_at_expire = 0;
					twait_block->vtag_block[i].v_tag = 0;
					if (set == 0) {
						/* Reuse it for my new tag */
						twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
						twait_block->vtag_block[0].v_tag = tag;
						set = 1;
					}
				}
			}
			if (set) {
				/*
				 * We only do up to the block where we can
				 * place our tag for audits
				 */
				break;
			}
		}
	}
	/* Need to add a new block to chain */
	if (!set) {
		twait_block = malloc(sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
		if (twait_block == NULL) {
			return;
		}
		memset(twait_block, 0, sizeof(struct sctp_timewait));
		LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
		twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
		    SCTP_TIME_WAIT;
		twait_block->vtag_block[0].v_tag = tag;
	}
}


static void
sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
{
	struct sctp_iterator *it;



	/* Unlock the tcb lock we do this so
	 * we avoid a dead lock scenario where
	 * the iterator is waiting on the TCB lock
	 * and the TCB lock is waiting on the iterator
	 * lock.
	 */
	SCTP_ITERATOR_LOCK();
	SCTP_INP_INFO_WLOCK();
	SCTP_INP_WLOCK(inp);
	SCTP_TCB_LOCK(stcb);

	it = stcb->asoc.stcb_starting_point_for_iterator;
	if (it == NULL) {
		return;
	}
	if (it->inp != stcb->sctp_ep) {
		/* hm, focused on the wrong one? */
		return;
	}
	if (it->stcb != stcb) {
		return;
	}
	it->stcb = LIST_NEXT(stcb, sctp_tcblist);
	if (it->stcb == NULL) {
		/* done with all asoc's in this assoc */
		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
			it->inp = NULL;
		} else {

			it->inp = LIST_NEXT(inp, sctp_list);
		}
	}
}

/*
 * Free the association after un-hashing the remote port.
 */
void
sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
{
	struct sctp_association *asoc;
	struct sctp_nets *net, *prev;
	struct sctp_laddr *laddr;
	struct sctp_tmit_chunk *chk;
	struct sctp_asconf_addr *aparam;
	struct sctp_socket_q_list *sq;
	int s;

	/* first, lets purge the entry from the hash table. */
	s = splsoftnet();
	if (stcb->asoc.state == 0) {
		printf("Freeing already free association:%p - huh??\n",
		    stcb);
		splx(s);
		return;
	}
	asoc = &stcb->asoc;
	asoc->state = 0;
	/* now clean up any other timers */
	callout_stop(&asoc->hb_timer.timer);
	callout_destroy(&asoc->hb_timer.timer);
	callout_stop(&asoc->dack_timer.timer);
	callout_destroy(&asoc->dack_timer.timer);
	callout_stop(&asoc->asconf_timer.timer);
	callout_destroy(&asoc->asconf_timer.timer);
	callout_stop(&asoc->shut_guard_timer.timer);
	callout_destroy(&asoc->shut_guard_timer.timer);
	callout_stop(&asoc->autoclose_timer.timer);
	callout_destroy(&asoc->autoclose_timer.timer);
	callout_stop(&asoc->delayed_event_timer.timer);
	callout_destroy(&asoc->delayed_event_timer.timer);
	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
		callout_stop(&net->rxt_timer.timer);
		callout_stop(&net->pmtu_timer.timer);
		callout_destroy(&net->rxt_timer.timer);
		callout_destroy(&net->pmtu_timer.timer);
	}

	/* Iterator asoc being freed we send an
	 * unlocked TCB. It returns with INP_INFO
	 * and INP write locked and the TCB locked
	 * too and of course the iterator lock
	 * in place as well..
	 */
	SCTP_TCB_UNLOCK(stcb);
	sctp_iterator_asoc_being_freed(inp, stcb);

	/* Null all of my entry's on the socket q */
	TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
		if (sq->tcb == stcb) {
			sq->tcb = NULL;
		}
	}

	if (inp->sctp_tcb_at_block == (void *)stcb) {
		inp->error_on_block = ECONNRESET;
	}

	if (inp->sctp_tcbhash) {
		LIST_REMOVE(stcb, sctp_tcbhash);
	}
	/* Now lets remove it from the list of ALL associations in the EP */
	LIST_REMOVE(stcb, sctp_tcblist);
	SCTP_INP_WUNLOCK(inp);
	SCTP_ITERATOR_UNLOCK();


	/* pull from vtag hash */
	LIST_REMOVE(stcb, sctp_asocs);

	/*
	 * Now before we can free the assoc, we must  remove all of the
	 * networks and any other allocated space.. i.e. add removes here
	 * before the SCTP_ZONE_FREE() of the tasoc entry.
	 */

	sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
	SCTP_INP_INFO_WUNLOCK();
	prev = NULL;
	while (!TAILQ_EMPTY(&asoc->nets)) {
		net = TAILQ_FIRST(&asoc->nets);
		/* pull from list */
		if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
			break;
		}
		prev = net;
		TAILQ_REMOVE(&asoc->nets, net, sctp_next);
		rtcache_free(&net->ro);
		/* free it */
		net->ref_count = 0;
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
		sctppcbinfo.ipi_count_raddr--;
	}
	/*
	 * The chunk lists and such SHOULD be empty but we check them
	 * just in case.
	 */
	/* anything on the wheel needs to be removed */
	while (!TAILQ_EMPTY(&asoc->out_wheel)) {
		struct sctp_stream_out *outs;
		outs = TAILQ_FIRST(&asoc->out_wheel);
		TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
		/* now clean up any chunks here */
		chk = TAILQ_FIRST(&outs->outqueue);
		while (chk) {
			TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			chk->whoTo = NULL;
			chk->asoc = NULL;
			/* Free the chunk */
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			sctppcbinfo.ipi_gencnt_chunk++;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			chk = TAILQ_FIRST(&outs->outqueue);
		}
		outs = TAILQ_FIRST(&asoc->out_wheel);
	}

	if (asoc->pending_reply) {
		free(asoc->pending_reply, M_PCB);
		asoc->pending_reply = NULL;
	}
	chk = TAILQ_FIRST(&asoc->pending_reply_queue);
	while (chk) {
		TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
		sctp_m_freem(chk->data);
		chk->data = NULL;
		chk->whoTo = NULL;
		chk->asoc = NULL;
		/* Free the chunk */
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
		sctppcbinfo.ipi_count_chunk--;
		sctppcbinfo.ipi_gencnt_chunk++;
		if ((int)sctppcbinfo.ipi_count_chunk < 0) {
			panic("Chunk count is negative");
		}
		chk = TAILQ_FIRST(&asoc->pending_reply_queue);
	}
	/* 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);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			sctppcbinfo.ipi_gencnt_chunk++;
			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);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			sctppcbinfo.ipi_gencnt_chunk++;
			chk = TAILQ_FIRST(&asoc->sent_queue);
		}
	}
	/* control queue MAY not be empty */
	if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
		chk = TAILQ_FIRST(&asoc->control_send_queue);
		while (chk) {
			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			sctppcbinfo.ipi_gencnt_chunk++;
			chk = TAILQ_FIRST(&asoc->control_send_queue);
		}
	}
	if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
		chk = TAILQ_FIRST(&asoc->reasmqueue);
		while (chk) {
			TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			sctppcbinfo.ipi_gencnt_chunk++;
			chk = TAILQ_FIRST(&asoc->reasmqueue);
		}
	}
	if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
		chk = TAILQ_FIRST(&asoc->delivery_queue);
		while (chk) {
			TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			sctppcbinfo.ipi_gencnt_chunk++;
			chk = TAILQ_FIRST(&asoc->delivery_queue);
		}
	}
	if (asoc->mapping_array) {
		free(asoc->mapping_array, M_PCB);
		asoc->mapping_array = NULL;
	}

	/* the stream outs */
	if (asoc->strmout) {
		free(asoc->strmout, M_PCB);
		asoc->strmout = NULL;
	}
	asoc->streamoutcnt = 0;
	if (asoc->strmin) {
		int i;
		for (i = 0; i < asoc->streamincnt; i++) {
			if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
				/* We have somethings on the streamin queue */
				chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
				while (chk) {
					TAILQ_REMOVE(&asoc->strmin[i].inqueue,
					    chk, sctp_next);
					sctp_m_freem(chk->data);
					chk->data = NULL;
					SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
					    chk);
					sctppcbinfo.ipi_count_chunk--;
					if ((int)sctppcbinfo.ipi_count_chunk < 0) {
						panic("Chunk count is negative");
					}
					sctppcbinfo.ipi_gencnt_chunk++;
					chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
				}
			}
		}
		free(asoc->strmin, M_PCB);
		asoc->strmin = NULL;
	}
	asoc->streamincnt = 0;
	/* local addresses, if any */
	while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
		laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
		LIST_REMOVE(laddr, sctp_nxt_addr);
		SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
		sctppcbinfo.ipi_count_laddr--;
	}
	/* pending asconf (address) parameters */
	while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
		aparam = TAILQ_FIRST(&asoc->asconf_queue);
		TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
		free(aparam, M_PCB);
	}
	sctp_m_freem(asoc->last_asconf_ack_sent);
	asoc->last_asconf_ack_sent = NULL;
	/* Insert new items here :> */

	/* Get rid of LOCK */
	SCTP_TCB_LOCK_DESTROY(stcb);

	/* now clean up the tasoc itself */
	SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
	sctppcbinfo.ipi_count_asoc--;
	if ((inp->sctp_socket->so_snd.sb_cc) ||
	    (inp->sctp_socket->so_snd.sb_mbcnt)) {
		/* This will happen when a abort is done */
		inp->sctp_socket->so_snd.sb_cc = 0;
		inp->sctp_socket->so_snd.sb_mbcnt = 0;
	}
	if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
		if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
			if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
				/*
				 * For the base fd, that is NOT in TCP pool we
				 * turn off the connected flag. This allows
				 * non-listening endpoints to connect/shutdown/
				 * connect.
				 */
				inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
				soisdisconnected(inp->sctp_socket);
			}
			/*
			 * For those that are in the TCP pool we just leave
			 * so it cannot be used. When they close the fd we
			 * will free it all.
			 */
		}
	}
	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
		sctp_inpcb_free(inp, 0);
	}
	splx(s);
}


/*
 * determine if a destination is "reachable" based upon the addresses
 * bound to the current endpoint (e.g. only v4 or v6 currently bound)
 */
/*
 * FIX: if we allow assoc-level bindx(), then this needs to be fixed
 * to use assoc level v4/v6 flags, as the assoc *may* not have the
 * same address types bound as its endpoint
 */
int
sctp_destination_is_reachable(struct sctp_tcb *stcb, const struct sockaddr *destaddr)
{
	struct sctp_inpcb *inp;
	int answer;

	/* No locks here, the TCB, in all cases is already
	 * locked and an assoc is up. There is either a
	 * INP lock by the caller applied (in asconf case when
	 * deleting an address) or NOT in the HB case, however
	 * if HB then the INP increment is up and the INP
	 * will not be removed (on top of the fact that
	 * we have a TCB lock). So we only want to
	 * read the sctp_flags, which is either bound-all
	 * or not.. no protection needed since once an
	 * assoc is up you can't be changing your binding.
	 */
	inp = stcb->sctp_ep;
	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
		/* if bound all, destination is not restricted */
		/* RRS: Question during lock work: Is this
		 * correct? If you are bound-all you still
		 * might need to obey the V4--V6 flags???
		 * IMO this bound-all stuff needs to be removed!
		 */
		return (1);
	}
	/* NOTE: all "scope" checks are done when local addresses are added */
	if (destaddr->sa_family == AF_INET6) {
		answer = inp->inp_vflag & INP_IPV6;
	} else if (destaddr->sa_family == AF_INET) {
		answer = inp->inp_vflag & INP_IPV4;
	} else {
		/* invalid family, so it's unreachable */
		answer = 0;
	}
	return (answer);
}

/*
 * update the inp_vflags on an endpoint
 */
static void
sctp_update_ep_vflag(struct sctp_inpcb *inp) {
	struct sctp_laddr *laddr;

	/* first clear the flag */
	inp->inp_vflag = 0;

	/* set the flag based on addresses on the ep list */
	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
		if (laddr->ifa == NULL) {
#ifdef SCTP_DEBUG
			if (sctp_debug_on & SCTP_DEBUG_PCB1) {
				printf("An ounce of prevention is worth a pound of cure\n");
			}
#endif /* SCTP_DEBUG */
			continue;
		}
		if (laddr->ifa->ifa_addr) {
			continue;
		}
		if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
			inp->inp_vflag |= INP_IPV6;
		} else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
			inp->inp_vflag |= INP_IPV4;
		}
	}
}

/*
 * Add the address to the endpoint local address list
 * There is nothing to be done if we are bound to all addresses
 */
int
sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
{
	struct sctp_laddr *laddr;
	int fnd, error;
	fnd = 0;

	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
		/* You are already bound to all. You have it already */
		return (0);
	}
	if (ifa->ifa_addr->sa_family == AF_INET6) {
		struct in6_ifaddr *ifa6;
		ifa6 = (struct in6_ifaddr *)ifa;
		if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
		    IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
			/* Can't bind a non-existent addr. */
			return (-1);
	}
	/* first, is it already present? */
	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
		if (laddr->ifa == ifa) {
			fnd = 1;
			break;
		}
	}

	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
		/* Not bound to all */
		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
		if (error != 0)
			return (error);
		inp->laddr_count++;
		/* update inp_vflag flags */
		if (ifa->ifa_addr->sa_family == AF_INET6) {
			inp->inp_vflag |= INP_IPV6;
		} else if (ifa->ifa_addr->sa_family == AF_INET) {
			inp->inp_vflag |= INP_IPV4;
		}
	}
	return (0);
}


/*
 * select a new (hopefully reachable) destination net
 * (should only be used when we deleted an ep addr that is the
 * only usable source address to reach the destination net)
 */
static void
sctp_select_primary_destination(struct sctp_tcb *stcb)
{
	struct sctp_nets *net;

	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
		/* for now, we'll just pick the first reachable one we find */
		if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
			continue;
		if (sctp_destination_is_reachable(stcb,
			rtcache_getdst(&net->ro))) {
			/* found a reachable destination */
			stcb->asoc.primary_destination = net;
		}
	}
	/* I can't there from here! ...we're gonna die shortly... */
}


/*
 * Delete the address from the endpoint local address list
 * There is nothing to be done if we are bound to all addresses
 */
int
sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
{
	struct sctp_laddr *laddr;
	int fnd;
	fnd = 0;
	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
		/* You are already bound to all. You have it already */
		return (EINVAL);
	}

	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
		if (laddr->ifa == ifa) {
			fnd = 1;
			break;
		}
	}
	if (fnd && (inp->laddr_count < 2)) {
		/* can't delete unless there are at LEAST 2 addresses */
		return (-1);
	}
	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
		/*
		 * clean up any use of this address
		 * go through our associations and clear any
		 *  last_used_address that match this one
		 * for each assoc, see if a new primary_destination is needed
		 */
		struct sctp_tcb *stcb;

		/* clean up "next_addr_touse" */
		if (inp->next_addr_touse == laddr)
			/* delete this address */
			inp->next_addr_touse = NULL;

		/* clean up "last_used_address" */
		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
			if (stcb->asoc.last_used_address == laddr)
				/* delete this address */
				stcb->asoc.last_used_address = NULL;
		} /* for each tcb */

		/* remove it from the ep list */
		sctp_remove_laddr(laddr);
		inp->laddr_count--;
		/* update inp_vflag flags */
		sctp_update_ep_vflag(inp);
		/* select a new primary destination if needed */
		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
			/* presume caller (sctp_asconf.c) already owns INP lock */
			SCTP_TCB_LOCK(stcb);
			if (sctp_destination_is_reachable(stcb,
			    rtcache_getdst(&stcb->asoc.primary_destination->ro)) == 0) {
				sctp_select_primary_destination(stcb);
			}
			SCTP_TCB_UNLOCK(stcb);
		} /* for each tcb */
	}
	return (0);
}

/*
 * Add the addr to the TCB local address list
 * For the BOUNDALL or dynamic case, this is a "pending" address list
 * (eg. addresses waiting for an ASCONF-ACK response)
 * For the subset binding, static case, this is a "valid" address list
 */
int
sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
{
	struct sctp_laddr *laddr;
	int error;

	/* Assumes TCP is locked.. and possiblye
	 * the INP. May need to confirm/fix that if
	 * we need it and is not the case.
	 */
	if (ifa->ifa_addr->sa_family == AF_INET6) {
		struct in6_ifaddr *ifa6;
		ifa6 = (struct in6_ifaddr *)ifa;
		if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
		    /* IN6_IFF_DEPRECATED | */
		    IN6_IFF_ANYCAST |
		    IN6_IFF_NOTREADY))
			/* Can't bind a non-existent addr. */
			return (-1);
	}
	/* does the address already exist? */
	LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
		if (laddr->ifa == ifa) {
			return (-1);
		}
	}

	/* add to the list */
	error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
	if (error != 0)
		return (error);
	return (0);
}

/*
 * insert an laddr entry with the given ifa for the desired list
 */
int
sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
	struct sctp_laddr *laddr;
	int s;

	s = splsoftnet();

	laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
	if (laddr == NULL) {
		/* out of memory? */
		splx(s);
		return (EINVAL);
	}
	sctppcbinfo.ipi_count_laddr++;
	sctppcbinfo.ipi_gencnt_laddr++;
	memset(laddr, 0, sizeof(*laddr));
	laddr->ifa = ifa;
	/* insert it */
	LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);

	splx(s);
	return (0);
}

/*
 * Remove an laddr entry from the local address list (on an assoc)
 */
void
sctp_remove_laddr(struct sctp_laddr *laddr)
{
	int s;
	s = splsoftnet();
	/* remove from the list */
	LIST_REMOVE(laddr, sctp_nxt_addr);
	SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
	sctppcbinfo.ipi_count_laddr--;
	sctppcbinfo.ipi_gencnt_laddr++;

	splx(s);
}

/*
 * Remove an address from the TCB local address list
 */
int
sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
{
	struct sctp_inpcb *inp;
	struct sctp_laddr *laddr;

	/* This is called by asconf work. It is assumed that
	 * a) The TCB is locked
	 * and
	 * b) The INP is locked.
	 * This is true in as much as I can trace through
	 * the entry asconf code where I did these locks.
	 * Again, the ASCONF code is a bit different in
	 * that it does lock the INP during its work often
	 * times. This must be since we don't want other
	 * proc's looking up things while what they are
	 * looking up is changing :-D
	 */

	inp = stcb->sctp_ep;
	/* if subset bound and don't allow ASCONF's, can't delete last */
	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
	    ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
		if (stcb->asoc.numnets < 2) {
			/* can't delete last address */
			return (-1);
		}
	}

	LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
		/* remove the address if it exists */
		if (laddr->ifa == NULL)
			continue;
		if (laddr->ifa == ifa) {
			sctp_remove_laddr(laddr);
			return (0);
		}
	}

	/* address not found! */
	return (-1);
}

/*
 * Remove an address from the TCB local address list
 * lookup using a sockaddr addr
 */
int
sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
{
	struct sctp_inpcb *inp;
	struct sctp_laddr *laddr;
	struct sockaddr *l_sa;

        /*
         * This function I find does not seem to have a caller.
	 * As such we NEED TO DELETE this code. If we do
	 * find a caller, the caller MUST have locked the TCB
	 * at the least and probably the INP as well.
         */
	inp = stcb->sctp_ep;
	/* if subset bound and don't allow ASCONF's, can't delete last */
	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
	    ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
		if (stcb->asoc.numnets < 2) {
			/* can't delete last address */
			return (-1);
		}
	}

	LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
		/* make sure the address exists */
		if (laddr->ifa == NULL)
			continue;
		if (laddr->ifa->ifa_addr == NULL)
			continue;

		l_sa = laddr->ifa->ifa_addr;
		if (l_sa->sa_family == AF_INET6) {
			/* IPv6 address */
			struct sockaddr_in6 *sin1, *sin2;
			sin1 = (struct sockaddr_in6 *)l_sa;
			sin2 = (struct sockaddr_in6 *)sa;
			if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
			    sizeof(struct in6_addr)) == 0) {
				/* matched */
				sctp_remove_laddr(laddr);
				return (0);
			}
		} else if (l_sa->sa_family == AF_INET) {
			/* IPv4 address */
			struct sockaddr_in *sin1, *sin2;
			sin1 = (struct sockaddr_in *)l_sa;
			sin2 = (struct sockaddr_in *)sa;
			if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
				/* matched */
				sctp_remove_laddr(laddr);
				return (0);
			}
		} else {
			/* invalid family */
			return (-1);
		}
	} /* end foreach */
	/* address not found! */
	return (-1);
}

static char sctp_pcb_initialized = 0;

#if defined(__FreeBSD__) || defined(__APPLE__)
/* sysctl */
static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;

#endif /* FreeBSD || APPLE */

#ifndef SCTP_TCBHASHSIZE
#define SCTP_TCBHASHSIZE 1024
#endif

#ifndef SCTP_CHUNKQUEUE_SCALE
#define SCTP_CHUNKQUEUE_SCALE 10
#endif

void
sctp_pcb_init(void)
{
	/*
	 * SCTP initialization for the PCB structures
	 * should be called by the sctp_init() function.
	 */
	int i;
	int hashtblsize = SCTP_TCBHASHSIZE;

#if defined(__FreeBSD__) || defined(__APPLE__)
	int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
#endif

	if (sctp_pcb_initialized != 0) {
		/* error I was called twice */
		return;
	}
	sctp_pcb_initialized = 1;

	/* Init all peg counts */
	for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
		sctp_pegs[i] = 0;
	}

	/* init the empty list of (All) Endpoints */
	LIST_INIT(&sctppcbinfo.listhead);

	/* init the iterator head */
	LIST_INIT(&sctppcbinfo.iteratorhead);

	/* init the hash table of endpoints */
#if defined(__FreeBSD__)
#if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
#else
	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
	    hashtblsize);
	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
	    sctp_pcbtblsize);
	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
	    sctp_chunkscale);
#endif
#endif

	sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31), HASH_LIST,
			M_WAITOK, &sctppcbinfo.hashasocmark);

	sctppcbinfo.sctp_ephash = hashinit(hashtblsize, HASH_LIST,
			M_WAITOK, &sctppcbinfo.hashmark);

	sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize, HASH_LIST,
			M_WAITOK, &sctppcbinfo.hashtcpmark);

	sctppcbinfo.hashtblsize = hashtblsize;

	/* init the zones */
	/*
	 * FIX ME: Should check for NULL returns, but if it does fail we
	 * are doomed to panic anyways... add later maybe.
	 */
	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
	    sizeof(struct sctp_inpcb), maxsockets);

	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
	    sizeof(struct sctp_tcb), sctp_max_number_of_assoc);

	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
	    sizeof(struct sctp_laddr),
	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));

	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
	    sizeof(struct sctp_nets),
	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));

	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
	    sizeof(struct sctp_tmit_chunk),
	    (sctp_max_number_of_assoc * sctp_scale_up_for_address *
	    sctp_chunkscale));

	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
	    sizeof(struct sctp_socket_q_list),
	    (sctp_max_number_of_assoc * sctp_scale_up_for_address *
	    sctp_chunkscale));

	SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_hash, "sctp_hash",
		       sizeof(void *) * sctp_pcbtblsize, maxsockets);

        /* Master Lock INIT for info structure */
	SCTP_INP_INFO_LOCK_INIT();
	SCTP_ITERATOR_LOCK_INIT();
	/* not sure if we need all the counts */
	sctppcbinfo.ipi_count_ep = 0;
	sctppcbinfo.ipi_gencnt_ep = 0;
	/* assoc/tcb zone info */
	sctppcbinfo.ipi_count_asoc = 0;
	sctppcbinfo.ipi_gencnt_asoc = 0;
	/* local addrlist zone info */
	sctppcbinfo.ipi_count_laddr = 0;
	sctppcbinfo.ipi_gencnt_laddr = 0;
	/* remote addrlist zone info */
	sctppcbinfo.ipi_count_raddr = 0;
	sctppcbinfo.ipi_gencnt_raddr = 0;
	/* chunk info */
	sctppcbinfo.ipi_count_chunk = 0;
	sctppcbinfo.ipi_gencnt_chunk = 0;

	/* socket queue zone info */
	sctppcbinfo.ipi_count_sockq = 0;
	sctppcbinfo.ipi_gencnt_sockq = 0;

	/* mbuf tracker */
	sctppcbinfo.mbuf_track = 0;
	/* port stuff */
	sctppcbinfo.lastlow = anonportmin;

	/* Init the TIMEWAIT list */
	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
		LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
	}

#if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
	TAILQ_INIT(&sctppcbinfo.callqueue);
#endif

}

int
sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
    int iphlen, int offset, int limit, struct sctphdr *sh,
    struct sockaddr *altsa)
{
	/*
	 * grub through the INIT pulling addresses and
	 * loading them to the nets structure in the asoc.
	 * The from address in the mbuf should also be loaded
	 * (if it is not already). This routine can be called
	 * with either INIT or INIT-ACK's as long as the
	 * m points to the IP packet and the offset points
	 * to the beginning of the parameters.
	 */
	struct sctp_inpcb *inp, *l_inp;
	struct sctp_nets *net, *net_tmp;
	struct ip *iph;
	struct sctp_paramhdr *phdr, parm_buf;
	struct sctp_tcb *stcb_tmp;
	u_int16_t ptype, plen;
	struct sockaddr *sa;
	struct sockaddr_storage dest_store;
	struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
	struct sockaddr_in sin;
	struct sockaddr_in6 sin6;

	/* First get the destination address setup too. */
	memset(&sin, 0, sizeof(sin));
	memset(&sin6, 0, sizeof(sin6));

	sin.sin_family = AF_INET;
	sin.sin_len = sizeof(sin);
	sin.sin_port = stcb->rport;

	sin6.sin6_family = AF_INET6;
	sin6.sin6_len = sizeof(struct sockaddr_in6);
	sin6.sin6_port = stcb->rport;
	if (altsa == NULL) {
		iph = mtod(m, struct ip *);
		if (iph->ip_v == IPVERSION) {
			/* its IPv4 */
			struct sockaddr_in *sin_2;
			sin_2 = (struct sockaddr_in *)(local_sa);
			memset(sin_2, 0, sizeof(sin));
			sin_2->sin_family = AF_INET;
			sin_2->sin_len = sizeof(sin);
			sin_2->sin_port = sh->dest_port;
			sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
			sin.sin_addr = iph->ip_src;
			sa = (struct sockaddr *)&sin;
		} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
			/* its IPv6 */
			struct ip6_hdr *ip6;
			struct sockaddr_in6 *sin6_2;

			ip6 = mtod(m, struct ip6_hdr *);
			sin6_2 = (struct sockaddr_in6 *)(local_sa);
			memset(sin6_2, 0, sizeof(sin6));
			sin6_2->sin6_family = AF_INET6;
			sin6_2->sin6_len = sizeof(struct sockaddr_in6);
			sin6_2->sin6_port = sh->dest_port;
			sin6.sin6_addr = ip6->ip6_src;
			sa = (struct sockaddr *)&sin6;
		} else {
			sa = NULL;
		}
	} else {
		/*
		 * For cookies we use the src address NOT from the packet
		 * but from the original INIT
		 */
		sa = altsa;
	}
	/* Turn off ECN until we get through all params */
	stcb->asoc.ecn_allowed = 0;

	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
		/* mark all addresses that we have currently on the list */
		net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
	}
	/* does the source address already exist? if so skip it */
	l_inp = inp = stcb->sctp_ep;
	stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
	if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
		/* we must add the source address */
		/* no scope set here since we have a tcb already. */
		if ((sa->sa_family == AF_INET) &&
		    (stcb->asoc.ipv4_addr_legal)) {
			if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
				return (-1);
			}
		} else if ((sa->sa_family == AF_INET6) &&
		    (stcb->asoc.ipv6_addr_legal)) {
			if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
				return (-1);
			}
		}
	} else {
		if (net_tmp != NULL && stcb_tmp == stcb) {
			net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
		} else if (stcb_tmp != stcb) {
			/* It belongs to another association? */
			return (-1);
		}
	}
	/* since a unlock occurred we must check the
	 * TCB's state and the pcb's gone flags.
	 */
	if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
		/* the user freed the ep */
		return (-1);
	}
	if (stcb->asoc.state == 0) {
		/* the assoc was freed? */
		return (-1);
	}

	/* now we must go through each of the params. */
	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
	while (phdr) {
		ptype = ntohs(phdr->param_type);
		plen = ntohs(phdr->param_length);
		/*printf("ptype => %d, plen => %d\n", ptype, plen);*/
		if (offset + plen > limit) {
			break;
		}
		if (plen == 0) {
			break;
		}
		if ((ptype == SCTP_IPV4_ADDRESS) &&
		    (stcb->asoc.ipv4_addr_legal)) {
			struct sctp_ipv4addr_param *p4, p4_buf;
			/* ok get the v4 address and check/add */
			phdr = sctp_get_next_param(m, offset,
			    (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
			if (plen != sizeof(struct sctp_ipv4addr_param) ||
			    phdr == NULL) {
				return (-1);
			}
			p4 = (struct sctp_ipv4addr_param *)phdr;
			sin.sin_addr.s_addr = p4->addr;
			sa = (struct sockaddr *)&sin;
			inp = stcb->sctp_ep;
			stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
			    local_sa, stcb);

			if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
			    inp == NULL) {
				/* we must add the source address */
				/* no scope set since we have a tcb already */

				/* we must validate the state again here */
				if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
					/* the user freed the ep */
					return (-1);
				}
				if (stcb->asoc.state == 0) {
					/* the assoc was freed? */
					return (-1);
				}
				if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
					return (-1);
				}
			} else if (stcb_tmp == stcb) {
				if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
					/* the user freed the ep */
					return (-1);
				}
				if (stcb->asoc.state == 0) {
					/* the assoc was freed? */
					return (-1);
				}
				if (net != NULL) {
					/* clear flag */
					net->dest_state &=
					    ~SCTP_ADDR_NOT_IN_ASSOC;
				}
			} else {
				/* strange, address is in another assoc?
				 * straighten out locks.
				 */
				SCTP_TCB_UNLOCK(stcb_tmp);
				SCTP_INP_RLOCK(inp);
				if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
					/* the user freed the ep */
					SCTP_INP_RUNLOCK(l_inp);
					return (-1);
				}
				if (stcb->asoc.state == 0) {
					/* the assoc was freed? */
					SCTP_INP_RUNLOCK(l_inp);
					return (-1);
				}
				SCTP_TCB_LOCK(stcb);
				SCTP_INP_RUNLOCK(stcb->sctp_ep);
				return (-1);
			}
		} else if ((ptype == SCTP_IPV6_ADDRESS) &&
		    (stcb->asoc.ipv6_addr_legal)) {
			/* ok get the v6 address and check/add */
			struct sctp_ipv6addr_param *p6, p6_buf;
			phdr = sctp_get_next_param(m, offset,
			    (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
			if (plen != sizeof(struct sctp_ipv6addr_param) ||
			    phdr == NULL) {
				return (-1);
			}
			p6 = (struct sctp_ipv6addr_param *)phdr;
			memcpy((void *)&sin6.sin6_addr, p6->addr,
			    sizeof(p6->addr));
			sa = (struct sockaddr *)&sin6;
			inp = stcb->sctp_ep;
			stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
			    local_sa, stcb);
			if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
			    inp == NULL)) {
				/* we must validate the state again here */
				if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
					/* the user freed the ep */
					return (-1);
				}
				if (stcb->asoc.state == 0) {
					/* the assoc was freed? */
					return (-1);
				}
				/* we must add the address, no scope set */
				if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
					return (-1);
				}
			} else if (stcb_tmp == stcb) {
				/* we must validate the state again here */
				if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
					/* the user freed the ep */
					return (-1);
				}
				if (stcb->asoc.state == 0) {
					/* the assoc was freed? */
					return (-1);
				}
				if (net != NULL) {
					/* clear flag */
					net->dest_state &=
					    ~SCTP_ADDR_NOT_IN_ASSOC;
				}
			} else {
				/* strange, address is in another assoc?
				 * straighten out locks.
				 */
				SCTP_TCB_UNLOCK(stcb_tmp);
				SCTP_INP_RLOCK(l_inp);
				/* we must validate the state again here */
				if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
					/* the user freed the ep */
					SCTP_INP_RUNLOCK(l_inp);
					return (-1);
				}
				if (stcb->asoc.state == 0) {
					/* the assoc was freed? */
					SCTP_INP_RUNLOCK(l_inp);
					return (-1);
				}
				SCTP_TCB_LOCK(stcb);
				SCTP_INP_RUNLOCK(l_inp);
				return (-1);
			}
		} else if (ptype == SCTP_ECN_CAPABLE) {
			stcb->asoc.ecn_allowed = 1;
		} else if (ptype == SCTP_ULP_ADAPTION) {
			if (stcb->asoc.state != SCTP_STATE_OPEN) {
				struct sctp_adaption_layer_indication ai, *aip;

				phdr = sctp_get_next_param(m, offset,
							   (struct sctp_paramhdr *)&ai, sizeof(ai));
				aip = (struct sctp_adaption_layer_indication *)phdr;
				sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
						stcb, ntohl(aip->indication), NULL);
			}
		} else if (ptype == SCTP_SET_PRIM_ADDR) {
			struct sctp_asconf_addr_param lstore, *fee;
			struct sctp_asconf_addrv4_param *fii;
			int lptype;
			struct sockaddr *lsa = NULL;

			stcb->asoc.peer_supports_asconf = 1;
			stcb->asoc.peer_supports_asconf_setprim = 1;
			if (plen > sizeof(lstore)) {
				return (-1);
			}
			phdr = sctp_get_next_param(m, offset,
    			    (struct sctp_paramhdr *)&lstore, plen);
			if (phdr == NULL) {
				return (-1);
			}

			fee  = (struct sctp_asconf_addr_param *)phdr;
			lptype = ntohs(fee->addrp.ph.param_type);
			if (lptype == SCTP_IPV4_ADDRESS) {
				if (plen !=
				    sizeof(struct sctp_asconf_addrv4_param)) {
					printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
				           (int)sizeof(struct sctp_asconf_addrv4_param),
				           plen);
				} else {
					fii = (struct sctp_asconf_addrv4_param *)fee;
					sin.sin_addr.s_addr = fii->addrp.addr;
					lsa = (struct sockaddr *)&sin;
				}
			} else if (lptype == SCTP_IPV6_ADDRESS) {
				if (plen !=
				    sizeof(struct sctp_asconf_addr_param)) {
					printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
				           (int)sizeof(struct sctp_asconf_addr_param),
				           plen);
				} else {
					memcpy(sin6.sin6_addr.s6_addr,
					    fee->addrp.addr,
					    sizeof(fee->addrp.addr));
					lsa = (struct sockaddr *)&sin6;
				}
			}
			if (lsa) {
				sctp_set_primary_addr(stcb, sa, NULL);
			}

		} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
			/* Peer supports pr-sctp */
			stcb->asoc.peer_supports_prsctp = 1;
		} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
			/* A supported extension chunk */
			struct sctp_supported_chunk_types_param *pr_supported;
			uint8_t local_store[128];
			int num_ent, i;

			phdr = sctp_get_next_param(m, offset,
    			    (struct sctp_paramhdr *)&local_store, plen);
			if (phdr == NULL) {
				return (-1);
			}
			stcb->asoc.peer_supports_asconf = 0;
			stcb->asoc.peer_supports_asconf_setprim = 0;
			stcb->asoc.peer_supports_prsctp = 0;
			stcb->asoc.peer_supports_pktdrop = 0;
			stcb->asoc.peer_supports_strreset = 0;
			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
			num_ent = plen - sizeof(struct sctp_paramhdr);
			for (i=0; i<num_ent; i++) {
				switch (pr_supported->chunk_types[i]) {
				case SCTP_ASCONF:
					stcb->asoc.peer_supports_asconf = 1;
					stcb->asoc.peer_supports_asconf_setprim = 1;
					break;
				case SCTP_ASCONF_ACK:
					stcb->asoc.peer_supports_asconf = 1;
					stcb->asoc.peer_supports_asconf_setprim = 1;
					break;
				case SCTP_FORWARD_CUM_TSN:
					stcb->asoc.peer_supports_prsctp = 1;
					break;
				case SCTP_PACKET_DROPPED:
					stcb->asoc.peer_supports_pktdrop = 1;
					break;
				case SCTP_STREAM_RESET:
					stcb->asoc.peer_supports_strreset = 1;
					break;
				default:
					/* one I have not learned yet */
					break;

				}
			}
		} else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
			/* Peer supports ECN-nonce */
			stcb->asoc.peer_supports_ecn_nonce = 1;
			stcb->asoc.ecn_nonce_allowed = 1;
		} else if ((ptype == SCTP_HEARTBEAT_INFO) ||
			   (ptype == SCTP_STATE_COOKIE) ||
			   (ptype == SCTP_UNRECOG_PARAM) ||
			   (ptype == SCTP_COOKIE_PRESERVE) ||
			   (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
			   (ptype == SCTP_ADD_IP_ADDRESS) ||
			   (ptype == SCTP_DEL_IP_ADDRESS) ||
			   (ptype == SCTP_ERROR_CAUSE_IND) ||
			   (ptype == SCTP_SUCCESS_REPORT)) {
			/* don't care */;
		} else {
			if ((ptype & 0x8000) == 0x0000) {
				/* must stop processing the rest of
				 * the param's. Any report bits were
				 * handled with the call to sctp_arethere_unrecognized_parameters()
				 * when the INIT or INIT-ACK was first seen.
				 */
				break;
			}
		}
		offset += SCTP_SIZE32(plen);
		if (offset >= limit) {
			break;
		}
		phdr = sctp_get_next_param(m, offset, &parm_buf,
		    sizeof(parm_buf));
	}
	/* Now check to see if we need to purge any addresses */
	for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
		net_tmp = TAILQ_NEXT(net, sctp_next);
		if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
		    SCTP_ADDR_NOT_IN_ASSOC) {
			/* This address has been removed from the asoc */
			/* remove and free it */
			stcb->asoc.numnets--;
			TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
			sctp_free_remote_addr(net);
			if (net == stcb->asoc.primary_destination) {
				stcb->asoc.primary_destination = NULL;
				sctp_select_primary_destination(stcb);
			}
		}
	}
	return (0);
}

int
sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
    struct sctp_nets *net)
{
	/* make sure the requested primary address exists in the assoc */
	if (net == NULL && sa)
		net = sctp_findnet(stcb, sa);

	if (net == NULL) {
		/* didn't find the requested primary address! */
		return (-1);
	} else {
		/* set the primary address */
		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
			/* Must be confirmed */
			return (-1);
		}
		stcb->asoc.primary_destination = net;
		net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
		return (0);
	}
}


int
sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
{
	/*
	 * This function serves two purposes. It will see if a TAG can be
	 * re-used and return 1 for yes it is ok and 0 for don't use that
	 * tag.
	 * A secondary function it will do is purge out old tags that can
	 * be removed.
	 */
	struct sctpasochead *head;
	struct sctpvtaghead *chain;
	struct sctp_tagblock *twait_block;
	struct sctp_tcb *stcb;

	int i;
	SCTP_INP_INFO_WLOCK();
	chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
	/* First is the vtag in use ? */

	head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
	    sctppcbinfo.hashasocmark)];
	if (head == NULL) {
		SCTP_INP_INFO_WUNLOCK();
		return (0);
	}
	LIST_FOREACH(stcb, head, sctp_asocs) {
		if (stcb->asoc.my_vtag == tag) {
			/* We should remove this if and
			 * return 0 always if we want vtags
			 * unique across all endpoints. For
			 * now within a endpoint is ok.
			 */
 			if (inp == stcb->sctp_ep) {
				/* bad tag, in use */
				SCTP_INP_INFO_WUNLOCK();
				return (0);
			}
		}
	}
	if (!LIST_EMPTY(chain)) {
		/*
		 * Block(s) are present, lets see if we have this tag in
		 * the list
		 */
		LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
			for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
				if (twait_block->vtag_block[i].v_tag == 0) {
					/* not used */
					continue;
				} else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
				    now->tv_sec) {
					/* Audit expires this guy */
					twait_block->vtag_block[i].tv_sec_at_expire = 0;
					twait_block->vtag_block[i].v_tag = 0;
				} else if (twait_block->vtag_block[i].v_tag ==
				    tag) {
					/* Bad tag, sorry :< */
					SCTP_INP_INFO_WUNLOCK();
					return (0);
				}
			}
		}
	}
	/* Not found, ok to use the tag */
	SCTP_INP_INFO_WUNLOCK();
	return (1);
}


/*
 * Delete the address from the endpoint local address list
 * Lookup using a sockaddr address (ie. not an ifaddr)
 */
int
sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
{
	struct sctp_laddr *laddr;
	struct sockaddr *l_sa;
	int found = 0;
	/* Here is another function I cannot find a
	 * caller for. As such we SHOULD delete it
	 * if we have no users. If we find a user that
	 * user MUST have the INP locked.
	 *
	 */

	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
		/* You are already bound to all. You have it already */
		return (EINVAL);
	}

	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
		/* make sure the address exists */
		if (laddr->ifa == NULL)
			continue;
		if (laddr->ifa->ifa_addr == NULL)
			continue;

		l_sa = laddr->ifa->ifa_addr;
		if (l_sa->sa_family == AF_INET6) {
			/* IPv6 address */
			struct sockaddr_in6 *sin1, *sin2;
			sin1 = (struct sockaddr_in6 *)l_sa;
			sin2 = (struct sockaddr_in6 *)sa;
			if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
			    sizeof(struct in6_addr)) == 0) {
				/* matched */
				found = 1;
				break;
			}
		} else if (l_sa->sa_family == AF_INET) {
			/* IPv4 address */
			struct sockaddr_in *sin1, *sin2;
			sin1 = (struct sockaddr_in *)l_sa;
			sin2 = (struct sockaddr_in *)sa;
			if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
				/* matched */
				found = 1;
				break;
			}
		} else {
			/* invalid family */
			return (-1);
		}
	}

	if (found && inp->laddr_count < 2) {
		/* can't delete unless there are at LEAST 2 addresses */
		return (-1);
	}

	if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
		/*
		 * remove it from the ep list, this should NOT be
		 * done until its really gone from the interface list and
		 * we won't be receiving more of these. Probably right
		 * away. If we do allow a removal of an address from
		 * an association (sub-set bind) than this should NOT
		 * be called until the all ASCONF come back from this
		 * association.
		 */
		sctp_remove_laddr(laddr);
		return (0);
	} else {
		return (-1);
	}
}

static void
sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
{
	/*
	 * We must hunt this association for MBUF's past the cumack
	 * (i.e. out of order data that we can renege on).
	 */
	struct sctp_association *asoc;
	struct sctp_tmit_chunk *chk, *nchk;
	u_int32_t cumulative_tsn_p1, tsn;
	int cnt, strmat, gap;
	/* We look for anything larger than the cum-ack + 1 */

	asoc = &stcb->asoc;
	cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
	cnt = 0;
	/* First look in the re-assembly queue */
	chk = TAILQ_FIRST(&asoc->reasmqueue);
	while (chk) {
		/* Get the next one */
		nchk = TAILQ_NEXT(chk, sctp_next);
		if (compare_with_wrap(chk->rec.data.TSN_seq,
		    cumulative_tsn_p1, MAX_TSN)) {
			/* Yep it is above cum-ack */
			cnt++;
			tsn = chk->rec.data.TSN_seq;
			if (tsn >= asoc->mapping_array_base_tsn) {
				gap  = tsn - asoc->mapping_array_base_tsn;
			} else {
				gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
				    tsn + 1;
			}
			asoc->size_on_reasm_queue -= chk->send_size;
			asoc->cnt_on_reasm_queue--;
			SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
			TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
			sctp_m_freem(chk->data);
			chk->data = NULL;
			SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
			sctppcbinfo.ipi_count_chunk--;
			if ((int)sctppcbinfo.ipi_count_chunk < 0) {
				panic("Chunk count is negative");
			}
			sctppcbinfo.ipi_gencnt_chunk++;
		}
		chk = nchk;
	}
	/* Ok that was fun, now we will drain all the inbound streams? */
	for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
		chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
		while (chk) {
			nchk = TAILQ_NEXT(chk, sctp_next);
			if (compare_with_wrap(chk->rec.data.TSN_seq,
			    cumulative_tsn_p1, MAX_TSN)) {
				/* Yep it is above cum-ack */
				cnt++;
				tsn = chk->rec.data.TSN_seq;
				if (tsn >= asoc->mapping_array_base_tsn) {
					gap = tsn -
					    asoc->mapping_array_base_tsn;
				} else {
					gap = (MAX_TSN -
					    asoc->mapping_array_base_tsn) +
					    tsn + 1;
				}
				asoc->size_on_all_streams -= chk->send_size;
				asoc->cnt_on_all_streams--;

				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
				    gap);
				TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
				    chk, sctp_next);
				sctp_m_freem(chk->data);
				chk->data = NULL;
				SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
				sctppcbinfo.ipi_count_chunk--;
				if ((int)sctppcbinfo.ipi_count_chunk < 0) {
					panic("Chunk count is negative");
				}
				sctppcbinfo.ipi_gencnt_chunk++;
			}
			chk = nchk;
		}
	}
	/*
	 * Question, should we go through the delivery queue?
	 * The only reason things are on here is the app not reading OR a
	 * p-d-api up. An attacker COULD send enough in to initiate the
	 * PD-API and then send a bunch of stuff to other streams... these
	 * would wind up on the delivery queue.. and then we would not get
	 * to them. But in order to do this I then have to back-track and
	 * un-deliver sequence numbers in streams.. el-yucko. I think for
	 * now we will NOT look at the delivery queue and leave it to be
	 * something to consider later. An alternative would be to abort
	 * the P-D-API with a notification and then deliver the data....
	 * Or another method might be to keep track of how many times the
	 * situation occurs and if we see a possible attack underway just
	 * abort the association.
	 */
#ifdef SCTP_DEBUG
	if (sctp_debug_on & SCTP_DEBUG_PCB1) {
		if (cnt) {
			printf("Freed %d chunks from reneg harvest\n", cnt);
		}
	}
#endif /* SCTP_DEBUG */

	/*
	 * Another issue, in un-setting the TSN's in the mapping array we
	 * DID NOT adjust the highest_tsn marker.  This will cause one of
	 * two things to occur. It may cause us to do extra work in checking
	 * for our mapping array movement. More importantly it may cause us
	 * to SACK every datagram. This may not be a bad thing though since
	 * we will recover once we get our cum-ack above and all this stuff
	 * we dumped recovered.
	 */
}

void
sctp_drain(void)
{
	/*
	 * We must walk the PCB lists for ALL associations here. The system
	 * is LOW on MBUF's and needs help. This is where reneging will
	 * occur. We really hope this does NOT happen!
	 */
	struct sctp_inpcb *inp;
	struct sctp_tcb *stcb;

	SCTP_INP_INFO_RLOCK();
	LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
		/* For each endpoint */
		SCTP_INP_RLOCK(inp);
		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
			/* For each association */
			SCTP_TCB_LOCK(stcb);
			sctp_drain_mbufs(inp, stcb);
			SCTP_TCB_UNLOCK(stcb);
		}
		SCTP_INP_RUNLOCK(inp);
	}
	SCTP_INP_INFO_RUNLOCK();
}

int
sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
{
	struct sctp_socket_q_list *sq;

	/* write lock on INP assumed */
	if ((inp == NULL) || (stcb == NULL)) {
		/* I am paranoid */
		return (0);
	}
	sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
	    sctppcbinfo.ipi_zone_sockq);
	if (sq == NULL) {
		/* out of sq structs */
		return (0);
	}
	sctppcbinfo.ipi_count_sockq++;
	sctppcbinfo.ipi_gencnt_sockq++;
	if (stcb)
		stcb->asoc.cnt_msg_on_sb++;
	sq->tcb = stcb;
	TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
	return (1);
}


struct sctp_tcb *
sctp_remove_from_socket_q(struct sctp_inpcb *inp)
{
	struct sctp_tcb *stcb = NULL;
	struct sctp_socket_q_list *sq;

	/* W-Lock on INP assumed held */
	sq = TAILQ_FIRST(&inp->sctp_queue_list);
	if (sq == NULL)
		return (NULL);

	stcb = sq->tcb;
	TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
	SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
	sctppcbinfo.ipi_count_sockq--;
	sctppcbinfo.ipi_gencnt_sockq++;
	if (stcb) {
		stcb->asoc.cnt_msg_on_sb--;
	}
	return (stcb);
}

int
sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
		       void *argp, uint32_t argi, end_func ef,
		       struct sctp_inpcb *s_inp)
{
	struct sctp_iterator *it=NULL;
	int s;
	if (af == NULL) {
		return (-1);
	}
	it = malloc(sizeof(struct sctp_iterator), M_PCB, M_WAITOK);
	if (it == NULL) {
		return (ENOMEM);
	}
	memset(it, 0, sizeof(*it));
	it->function_toapply = af;
	it->function_atend = ef;
	it->pointer = argp;
	it->val = argi;
	it->pcb_flags = pcb_state;
	it->asoc_state = asoc_state;
	if (s_inp) {
		it->inp = s_inp;
		it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
	} else {
		SCTP_INP_INFO_RLOCK();
		it->inp = LIST_FIRST(&sctppcbinfo.listhead);
		SCTP_INP_INFO_RUNLOCK();
		it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;

	}
	/* Init the timer */
	callout_init(&it->tmr.timer, 0);
	/* add to the list of all iterators */
	SCTP_INP_INFO_WLOCK();
	LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
	SCTP_INP_INFO_WUNLOCK();
	s = splsoftnet();
	sctp_iterator_timer(it);
	splx(s);
	return (0);
}