kernel - fix sctp build (LINT)
[dragonfly.git] / sys / netinet / sctp_pcb.c
1 /*      $KAME: sctp_pcb.c,v 1.37 2004/08/17 06:28:02 t-momose Exp $     */
2 /*      $DragonFly: src/sys/netinet/sctp_pcb.c,v 1.14 2008/03/07 11:34:20 sephe Exp $   */
3
4 /*
5  * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *      This product includes software developed by Cisco Systems, Inc.
19  * 4. Neither the name of the project nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 #if !(defined(__OpenBSD__) || defined(__APPLE__))
36 #include "opt_ipsec.h"
37 #endif
38 #if defined(__FreeBSD__) || defined(__DragonFly__)
39 #include "opt_compat.h"
40 #include "opt_inet6.h"
41 #include "opt_inet.h"
42 #endif
43 #if defined(__NetBSD__)
44 #include "opt_inet.h"
45 #endif
46 #ifdef __APPLE__
47 #include <sctp.h>
48 #elif !defined(__OpenBSD__)
49 #include "opt_sctp.h"
50 #endif
51
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/malloc.h>
55 #include <sys/mbuf.h>
56 #include <sys/domain.h>
57 #include <sys/protosw.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
60 #include <sys/proc.h>
61 #include <sys/priv.h>
62 #include <sys/kernel.h>
63 #include <sys/sysctl.h>
64 #include <sys/thread2.h>
65 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
66 #include <sys/random.h>
67 #endif
68 #if defined(__NetBSD__)
69 #include <sys/rnd.h>
70 #endif
71 #if defined(__OpenBSD__)
72 #include <dev/rndvar.h>
73 #endif
74
75 #if defined(__APPLE__)
76 #include <netinet/sctp_callout.h>
77 #elif defined(__OpenBSD__)
78 #include <sys/timeout.h>
79 #else
80 #include <sys/callout.h>
81 #endif
82
83 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000)
84 #include <sys/limits.h>
85 #else
86 #include <machine/limits.h>
87 #endif
88 #include <machine/cpu.h>
89
90 #include <net/if.h>
91 #include <net/if_types.h>
92 #include <net/route.h>
93 #include <netinet/in.h>
94 #include <netinet/in_systm.h>
95 #include <netinet/ip.h>
96 #include <netinet/in_pcb.h>
97 #include <netinet/in_var.h>
98 #include <netinet/ip_var.h>
99
100 #ifdef INET6
101 #include <netinet/ip6.h>
102 #include <netinet6/ip6_var.h>
103 #include <netinet6/scope6_var.h>
104 #if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
105 #include <netinet6/in6_pcb.h>
106 #elif defined(__OpenBSD__)
107 #include <netinet/in_pcb.h>
108 #endif
109 #endif /* INET6 */
110
111 #ifdef IPSEC
112 #ifndef __OpenBSD__
113 #include <netinet6/ipsec.h>
114 #include <netproto/key/key.h>
115 #else
116 #undef IPSEC
117 #endif
118 #endif /* IPSEC */
119
120 #include <netinet/sctp_var.h>
121 #include <netinet/sctp_pcb.h>
122 #include <netinet/sctputil.h>
123 #include <netinet/sctp.h>
124 #include <netinet/sctp_header.h>
125 #include <netinet/sctp_asconf.h>
126 #include <netinet/sctp_output.h>
127 #include <netinet/sctp_timer.h>
128
129 #ifndef SCTP_PCBHASHSIZE
130 /* default number of association hash buckets in each endpoint */
131 #define SCTP_PCBHASHSIZE 256
132 #endif
133
134 #ifdef SCTP_DEBUG
135 u_int32_t sctp_debug_on = 0;
136 #endif /* SCTP_DEBUG */
137
138 u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
139
140 int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
141
142 struct sctp_epinfo sctppcbinfo;
143
144 /* FIX: we don't handle multiple link local scopes */
145 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
146 int
147 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
148 {
149         struct in6_addr tmp_a, tmp_b;
150         /* use a copy of a and b */
151         tmp_a = *a;
152         tmp_b = *b;
153         in6_clearscope(&tmp_a);
154         in6_clearscope(&tmp_b);
155         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
156 }
157
158 #ifdef __OpenBSD__
159 extern int ipport_firstauto;
160 extern int ipport_lastauto;
161 extern int ipport_hifirstauto;
162 extern int ipport_hilastauto;
163 #endif
164
165 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
166
167 #ifndef xyzzy
168 void sctp_validate_no_locks(void);
169
170 void
171 SCTP_INP_RLOCK(struct sctp_inpcb *inp)
172 {
173         struct sctp_tcb *stcb;
174         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
175                 if (mtx_owned(&(stcb)->tcb_mtx))
176                         panic("I own TCB lock?");
177         }
178         if (mtx_owned(&(inp)->inp_mtx))
179                 panic("INP Recursive Lock-R");
180         mtx_lock(&(inp)->inp_mtx);
181 }
182
183 void
184 SCTP_INP_WLOCK(struct sctp_inpcb *inp)
185 {
186         SCTP_INP_RLOCK(inp);
187 }
188
189 void
190 SCTP_INP_INFO_RLOCK(void)
191 {
192         struct sctp_inpcb *inp;
193         struct sctp_tcb *stcb;
194         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
195                 if (mtx_owned(&(inp)->inp_mtx))
196                         panic("info-lock and own inp lock?");
197                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
198                         if (mtx_owned(&(stcb)->tcb_mtx))
199                                 panic("Info lock and own a tcb lock?");
200                 }
201         }
202         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
203                 panic("INP INFO Recursive Lock-R");
204         mtx_lock(&sctppcbinfo.ipi_ep_mtx);
205 }
206
207 void
208 SCTP_INP_INFO_WLOCK(void)
209 {
210         SCTP_INP_INFO_RLOCK();
211 }
212
213
214 void sctp_validate_no_locks(void)
215 {
216         struct sctp_inpcb *inp;
217         struct sctp_tcb *stcb;
218
219         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
220                 panic("INP INFO lock is owned?");
221
222         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
223                 if (mtx_owned(&(inp)->inp_mtx))
224                         panic("You own an INP lock?");
225                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
226                         if (mtx_owned(&(stcb)->tcb_mtx))
227                                 panic("You own a TCB lock?");
228                 }
229         }
230 }
231
232 #endif
233 #endif
234
235 void
236 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
237 {
238         /* We really don't need
239          * to lock this, but I will
240          * just because it does not hurt.
241          */
242         SCTP_INP_INFO_RLOCK();
243         spcb->ep_count = sctppcbinfo.ipi_count_ep;
244         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
245         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
246         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
247         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
248         spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
249         spcb->mbuf_track = sctppcbinfo.mbuf_track;
250         SCTP_INP_INFO_RUNLOCK();
251 }
252
253
254 /*
255  * Notes on locks for FreeBSD 5 and up. All association
256  * lookups that have a definte ep, the INP structure is
257  * assumed to be locked for reading. If we need to go
258  * find the INP (ususally when a **inp is passed) then
259  * we must lock the INFO structure first and if needed
260  * lock the INP too. Note that if we lock it we must
261  *
262  */
263
264
265 /*
266  * Given a endpoint, look and find in its association list any association
267  * with the "to" address given. This can be a "from" address, too, for
268  * inbound packets. For outbound packets it is a true "to" address.
269  */
270 static struct sctp_tcb *
271 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
272                         struct sockaddr *to, struct sctp_nets **netp)
273 {
274         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
275
276         /*
277          * Note for this module care must be taken when observing what to is
278          * for. In most of the rest of the code the TO field represents my
279          * peer and the FROM field represents my address. For this module it
280          * is reversed of that.
281          */
282         /*
283          * If we support the TCP model, then we must now dig through to
284          * see if we can find our endpoint in the list of tcp ep's.
285          */
286         uint16_t lport, rport;
287         struct sctppcbhead *ephead;
288         struct sctp_inpcb *inp;
289         struct sctp_laddr *laddr;
290         struct sctp_tcb *stcb;
291         struct sctp_nets *net;
292
293         if ((to == NULL) || (from == NULL)) {
294                 return (NULL);
295         }
296
297         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
298                 lport = ((struct sockaddr_in *)to)->sin_port;
299                 rport = ((struct sockaddr_in *)from)->sin_port;
300         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
301                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
302                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
303         } else {
304                 return NULL;
305         }
306         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
307                                                      (lport + rport), sctppcbinfo.hashtcpmark)];
308         /*
309          * Ok now for each of the guys in this bucket we must look
310          * and see:
311          *  - Does the remote port match.
312          *  - Does there single association's addresses match this
313          *    address (to).
314          * If so we update p_ep to point to this ep and return the
315          * tcb from it.
316          */
317         LIST_FOREACH(inp, ephead, sctp_hash) {
318                 if (lport != inp->sctp_lport) {
319                         continue;
320                 }
321                 SCTP_INP_RLOCK(inp);
322                 /* check to see if the ep has one of the addresses */
323                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
324                         /* We are NOT bound all, so look further */
325                         int match = 0;
326
327                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
328                                 if (laddr->ifa == NULL) {
329 #ifdef SCTP_DEBUG
330                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
331                                                 kprintf("An ounce of prevention is worth a pound of cure\n");
332                                         }
333 #endif
334                                         continue;
335                                 }
336                                 if (laddr->ifa->ifa_addr == NULL) {
337 #ifdef SCTP_DEBUG
338                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
339                                                 kprintf("ifa with a NULL address\n");
340                                         }
341 #endif
342                                         continue;
343                                 }
344                                 if (laddr->ifa->ifa_addr->sa_family ==
345                                     to->sa_family) {
346                                         /* see if it matches */
347                                         struct sockaddr_in *intf_addr, *sin;
348                                         intf_addr = (struct sockaddr_in *)
349                                                 laddr->ifa->ifa_addr;
350                                         sin = (struct sockaddr_in *)to;
351                                         if (from->sa_family == AF_INET) {
352                                                 if (sin->sin_addr.s_addr ==
353                                                     intf_addr->sin_addr.s_addr) {
354                                                         match = 1;
355                                                         SCTP_INP_RUNLOCK(inp);
356                                                         break;
357                                                 }
358                                         } else {
359                                                 struct sockaddr_in6 *intf_addr6;
360                                                 struct sockaddr_in6 *sin6;
361                                                 sin6 = (struct sockaddr_in6 *)
362                                                         to;
363                                                 intf_addr6 = (struct sockaddr_in6 *)
364                                                         laddr->ifa->ifa_addr;
365
366                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
367                                                                          &intf_addr6->sin6_addr)) {
368                                                         match = 1;
369                                                         SCTP_INP_RUNLOCK(inp);
370                                                         break;
371                                                 }
372                                         }
373                                 }
374                         }
375                         if (match == 0) {
376                                 /* This endpoint does not have this address */
377                                 SCTP_INP_RUNLOCK(inp);
378                                 continue;
379                         }
380                 }
381                 /*
382                  * Ok if we hit here the ep has the address, does it hold the
383                  * tcb?
384                  */
385
386                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
387                 if (stcb == NULL) {
388                         SCTP_INP_RUNLOCK(inp);
389                         continue;
390                 }
391                 SCTP_TCB_LOCK(stcb);
392                 if (stcb->rport != rport) {
393                         /* remote port does not match. */
394                         SCTP_TCB_UNLOCK(stcb);
395                         SCTP_INP_RUNLOCK(inp);
396                         continue;
397                 }
398                 /* Does this TCB have a matching address? */
399                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
400                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
401                                 /* not the same family, can't be a match */
402                                 continue;
403                         }
404                         if (from->sa_family == AF_INET) {
405                                 struct sockaddr_in *sin, *rsin;
406                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
407                                 rsin = (struct sockaddr_in *)from;
408                                 if (sin->sin_addr.s_addr ==
409                                     rsin->sin_addr.s_addr) {
410                                         /* found it */
411                                         if (netp != NULL) {
412                                                 *netp = net;
413                                         }
414                                         /* Update the endpoint pointer */
415                                         *inp_p = inp;
416                                         SCTP_INP_RUNLOCK(inp);
417                                         return (stcb);
418                                 }
419                         } else {
420                                 struct sockaddr_in6 *sin6, *rsin6;
421                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
422                                 rsin6 = (struct sockaddr_in6 *)from;
423                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
424                                                          &rsin6->sin6_addr)) {
425                                         /* found it */
426                                         if (netp != NULL) {
427                                                 *netp = net;
428                                         }
429                                         /* Update the endpoint pointer */
430                                         *inp_p = inp;
431                                         SCTP_INP_RUNLOCK(inp);
432                                         return (stcb);
433                                 }
434                         }
435                 }
436                 SCTP_TCB_UNLOCK(stcb);
437
438                 SCTP_INP_RUNLOCK(inp);
439         }
440         return (NULL);
441 }
442
443 struct sctp_tcb *
444 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
445     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
446 {
447         struct sctp_tcb *stcb;
448         struct sockaddr_in *sin;
449         struct sockaddr_in6 *sin6;
450         struct sockaddr_storage local_store, remote_store;
451         struct ip *iph;
452         struct sctp_paramhdr parm_buf, *phdr;
453         int ptype;
454
455         memset(&local_store, 0, sizeof(local_store));
456         memset(&remote_store, 0, sizeof(remote_store));
457
458         /* First get the destination address setup too. */
459         iph = mtod(m, struct ip *);
460         if (iph->ip_v == IPVERSION) {
461                 /* its IPv4 */
462                 sin = (struct sockaddr_in *)&local_store;
463                 sin->sin_family = AF_INET;
464                 sin->sin_len = sizeof(*sin);
465                 sin->sin_port = sh->dest_port;
466                 sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
467         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
468                 /* its IPv6 */
469                 struct ip6_hdr *ip6;
470                 ip6 = mtod(m, struct ip6_hdr *);
471                 sin6 = (struct sockaddr_in6 *)&local_store;
472                 sin6->sin6_family = AF_INET6;
473                 sin6->sin6_len = sizeof(*sin6);
474                 sin6->sin6_port = sh->dest_port;
475                 sin6->sin6_addr = ip6->ip6_dst;
476         } else {
477                 return NULL;
478         }
479
480         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
481             &parm_buf, sizeof(struct sctp_paramhdr));
482         if (phdr == NULL) {
483 #ifdef SCTP_DEBUG
484                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
485                         kprintf("sctp_process_control: failed to get asconf lookup addr\n");
486                 }
487 #endif /* SCTP_DEBUG */
488                 return NULL;
489         }
490         ptype = (int)((u_int)ntohs(phdr->param_type));
491         /* get the correlation address */
492         if (ptype == SCTP_IPV6_ADDRESS) {
493                 /* ipv6 address param */
494                 struct sctp_ipv6addr_param *p6, p6_buf;
495                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
496                         return NULL;
497                 }
498
499                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
500                     offset + sizeof(struct sctp_asconf_chunk),
501                     &p6_buf.ph, sizeof(*p6));
502                 if (p6 == NULL) {
503 #ifdef SCTP_DEBUG
504                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
505                                 kprintf("sctp_process_control: failed to get asconf v6 lookup addr\n");
506                         }
507 #endif /* SCTP_DEBUG */
508                         return (NULL);
509                 }
510                 sin6 = (struct sockaddr_in6 *)&remote_store;
511                 sin6->sin6_family = AF_INET6;
512                 sin6->sin6_len = sizeof(*sin6);
513                 sin6->sin6_port = sh->src_port;
514                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
515         } else if (ptype == SCTP_IPV4_ADDRESS) {
516                 /* ipv4 address param */
517                 struct sctp_ipv4addr_param *p4, p4_buf;
518                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
519                         return NULL;
520                 }
521
522                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
523                     offset + sizeof(struct sctp_asconf_chunk),
524                     &p4_buf.ph, sizeof(*p4));
525                 if (p4 == NULL) {
526 #ifdef SCTP_DEBUG
527                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
528                                 kprintf("sctp_process_control: failed to get asconf v4 lookup addr\n");
529                         }
530 #endif /* SCTP_DEBUG */
531                         return (NULL);
532                 }
533                 sin = (struct sockaddr_in *)&remote_store;
534                 sin->sin_family = AF_INET;
535                 sin->sin_len = sizeof(*sin);
536                 sin->sin_port = sh->src_port;
537                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
538         } else {
539                 /* invalid address param type */
540                 return NULL;
541         }
542
543         stcb = sctp_findassociation_ep_addr(inp_p,
544             (struct sockaddr *)&remote_store, netp,
545             (struct sockaddr *)&local_store, NULL);
546         return (stcb);
547 }
548
549 struct sctp_tcb *
550 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
551     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
552 {
553         struct sctpasochead *head;
554         struct sctp_inpcb *inp;
555         struct sctp_tcb *stcb;
556         struct sctp_nets *net;
557         uint16_t rport;
558
559         inp = *inp_p;
560         if (remote->sa_family == AF_INET) {
561                 rport = (((struct sockaddr_in *)remote)->sin_port);
562         } else if (remote->sa_family == AF_INET6) {
563                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
564         } else {
565                 return (NULL);
566         }
567         if (locked_tcb) {
568                 /* UN-lock so we can do proper locking here
569                  * this occurs when called from load_addresses_from_init.
570                  */
571                 SCTP_TCB_UNLOCK(locked_tcb);
572         }
573         SCTP_INP_INFO_RLOCK();
574         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
575                 /*
576                  * Now either this guy is our listner or it's the connector.
577                  * If it is the one that issued the connect, then it's only
578                  * chance is to be the first TCB in the list. If it is the
579                  * acceptor, then do the special_lookup to hash and find the
580                  * real inp.
581                  */
582                 if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
583                         /* to is peer addr, from is my addr */
584                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
585                                                        netp);
586                         if ((stcb != NULL) && (locked_tcb == NULL)){
587                                 /* we have a locked tcb, lower refcount */
588                                 SCTP_INP_WLOCK(inp);
589                                 SCTP_INP_DECR_REF(inp);
590                                 SCTP_INP_WUNLOCK(inp);
591                         }
592                         if (locked_tcb != NULL) {
593                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
594                                 SCTP_TCB_LOCK(locked_tcb);
595                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
596                                 if (stcb != NULL)
597                                         SCTP_TCB_UNLOCK(stcb);
598                         }
599                         SCTP_INP_INFO_RUNLOCK();
600                         return (stcb);
601                 } else {
602                         SCTP_INP_WLOCK(inp);
603                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
604                         if (stcb == NULL) {
605                                 goto null_return;
606                         }
607                         SCTP_TCB_LOCK(stcb);
608                         if (stcb->rport != rport) {
609                                 /* remote port does not match. */
610                                 SCTP_TCB_UNLOCK(stcb);
611                                 goto null_return;
612                         }
613                         /* now look at the list of remote addresses */
614                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
615                                 if (net->ro._l_addr.sa.sa_family !=
616                                     remote->sa_family) {
617                                         /* not the same family */
618                                         continue;
619                                 }
620                                 if (remote->sa_family == AF_INET) {
621                                         struct sockaddr_in *sin, *rsin;
622                                         sin = (struct sockaddr_in *)
623                                                 &net->ro._l_addr;
624                                         rsin = (struct sockaddr_in *)remote;
625                                         if (sin->sin_addr.s_addr ==
626                                             rsin->sin_addr.s_addr) {
627                                                 /* found it */
628                                                 if (netp != NULL) {
629                                                         *netp = net;
630                                                 }
631                                                 if (locked_tcb == NULL) {
632                                                         SCTP_INP_DECR_REF(inp);
633                                                 }
634                                                 SCTP_INP_WUNLOCK(inp);
635                                                 SCTP_INP_INFO_RUNLOCK();
636                                                 return (stcb);
637                                         }
638                                 } else if (remote->sa_family == AF_INET6) {
639                                         struct sockaddr_in6 *sin6, *rsin6;
640                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
641                                         rsin6 = (struct sockaddr_in6 *)remote;
642                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
643                                                                  &rsin6->sin6_addr)) {
644                                                 /* found it */
645                                                 if (netp != NULL) {
646                                                         *netp = net;
647                                                 }
648                                                 if (locked_tcb == NULL) {
649                                                         SCTP_INP_DECR_REF(inp);
650                                                 }
651                                                 SCTP_INP_WUNLOCK(inp);
652                                                 SCTP_INP_INFO_RUNLOCK();
653                                                 return (stcb);
654                                         }
655                                 }
656                         }
657                         SCTP_TCB_UNLOCK(stcb);
658                 }
659         } else {
660                 SCTP_INP_WLOCK(inp);
661                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
662                                                                inp->sctp_hashmark)];
663                 if (head == NULL) {
664                         goto null_return;
665                 }
666                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
667                         if (stcb->rport != rport) {
668                                 /* remote port does not match */
669                                 continue;
670                         }
671                         /* now look at the list of remote addresses */
672                         SCTP_TCB_LOCK(stcb);
673                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
674                                 if (net->ro._l_addr.sa.sa_family !=
675                                     remote->sa_family) {
676                                         /* not the same family */
677                                         continue;
678                                 }
679                                 if (remote->sa_family == AF_INET) {
680                                         struct sockaddr_in *sin, *rsin;
681                                         sin = (struct sockaddr_in *)
682                                                 &net->ro._l_addr;
683                                         rsin = (struct sockaddr_in *)remote;
684                                         if (sin->sin_addr.s_addr ==
685                                             rsin->sin_addr.s_addr) {
686                                                 /* found it */
687                                                 if (netp != NULL) {
688                                                         *netp = net;
689                                                 }
690                                                 if (locked_tcb == NULL) {
691                                                         SCTP_INP_DECR_REF(inp);
692                                                 }
693                                                 SCTP_INP_WUNLOCK(inp);
694                                                 SCTP_INP_INFO_RUNLOCK();
695                                                 return (stcb);
696                                         }
697                                 } else if (remote->sa_family == AF_INET6) {
698                                         struct sockaddr_in6 *sin6, *rsin6;
699                                         sin6 = (struct sockaddr_in6 *)
700                                                 &net->ro._l_addr;
701                                         rsin6 = (struct sockaddr_in6 *)remote;
702                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
703                                                                  &rsin6->sin6_addr)) {
704                                                 /* found it */
705                                                 if (netp != NULL) {
706                                                         *netp = net;
707                                                 }
708                                                 if (locked_tcb == NULL) {
709                                                         SCTP_INP_DECR_REF(inp);
710                                                 }
711                                                 SCTP_INP_WUNLOCK(inp);
712                                                 SCTP_INP_INFO_RUNLOCK();
713                                                 return (stcb);
714                                         }
715                                 }
716                         }
717                         SCTP_TCB_UNLOCK(stcb);
718                 }
719         }
720  null_return:
721         /* clean up for returning null */
722         if (locked_tcb){
723                 if (locked_tcb->sctp_ep != inp) {
724                         SCTP_INP_RLOCK(locked_tcb->sctp_ep);
725                         SCTP_TCB_LOCK(locked_tcb);
726                         SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
727                 } else
728                         SCTP_TCB_LOCK(locked_tcb);
729         }
730         SCTP_INP_WUNLOCK(inp);
731         SCTP_INP_INFO_RUNLOCK();
732         /* not found */
733         return (NULL);
734 }
735
736 /*
737  * Find an association for a specific endpoint using the association id
738  * given out in the COMM_UP notification
739  */
740 struct sctp_tcb *
741 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, caddr_t asoc_id)
742 {
743         /*
744          * Use my the assoc_id to find a endpoint
745          */
746         struct sctpasochead *head;
747         struct sctp_tcb *stcb;
748         u_int32_t vtag;
749
750         if (asoc_id == 0 || inp == NULL) {
751                 return (NULL);
752         }
753         SCTP_INP_INFO_RLOCK();
754         vtag = (u_int32_t)asoc_id;
755         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
756             sctppcbinfo.hashasocmark)];
757         if (head == NULL) {
758                 /* invalid vtag */
759                 SCTP_INP_INFO_RUNLOCK();
760                 return (NULL);
761         }
762         LIST_FOREACH(stcb, head, sctp_asocs) {
763                 SCTP_INP_RLOCK(stcb->sctp_ep);
764                 SCTP_TCB_LOCK(stcb);
765                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
766                 if (stcb->asoc.my_vtag == vtag) {
767                         /* candidate */
768                         if (inp != stcb->sctp_ep) {
769                                 /* some other guy has the
770                                  * same vtag active (vtag collision).
771                                  */
772                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
773                                 SCTP_TCB_UNLOCK(stcb);
774                                 continue;
775                         }
776                         sctp_pegs[SCTP_VTAG_EXPR]++;
777                         SCTP_INP_INFO_RUNLOCK();
778                         return (stcb);
779                 }
780                 SCTP_TCB_UNLOCK(stcb);
781         }
782         SCTP_INP_INFO_RUNLOCK();
783         return (NULL);
784 }
785
786 static struct sctp_inpcb *
787 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
788                     uint16_t lport)
789 {
790         struct sctp_inpcb *inp;
791         struct sockaddr_in *sin;
792         struct sockaddr_in6 *sin6;
793         struct sctp_laddr *laddr;
794
795         /* Endpoing probe expects
796          * that the INP_INFO is locked.
797          */
798         if (nam->sa_family == AF_INET) {
799                 sin = (struct sockaddr_in *)nam;
800                 sin6 = NULL;
801         } else if (nam->sa_family == AF_INET6) {
802                 sin6 = (struct sockaddr_in6 *)nam;
803                 sin = NULL;
804         } else {
805                 /* unsupported family */
806                 return (NULL);
807         }
808         if (head == NULL)
809                 return (NULL);
810
811         LIST_FOREACH(inp, head, sctp_hash) {
812                 SCTP_INP_RLOCK(inp);
813
814                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
815                     (inp->sctp_lport == lport)) {
816                         /* got it */
817                         if ((nam->sa_family == AF_INET) &&
818                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
819 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
820                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
821 #else
822 #if defined(__OpenBSD__)
823                             (0) /* For open bsd we do dual bind only */
824 #else
825                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
826 #endif
827 #endif
828                                 ) {
829                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
830                                 SCTP_INP_RUNLOCK(inp);
831                                 continue;
832                         }
833                         /* A V6 address and the endpoint is NOT bound V6 */
834                         if (nam->sa_family == AF_INET6 &&
835                            (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
836                                 SCTP_INP_RUNLOCK(inp);
837                                 continue;
838                         }
839                         SCTP_INP_RUNLOCK(inp);
840                         return (inp);
841                 }
842                 SCTP_INP_RUNLOCK(inp);
843         }
844
845         if ((nam->sa_family == AF_INET) &&
846             (sin->sin_addr.s_addr == INADDR_ANY)) {
847                 /* Can't hunt for one that has no address specified */
848                 return (NULL);
849         } else if ((nam->sa_family == AF_INET6) &&
850                    (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
851                 /* Can't hunt for one that has no address specified */
852                 return (NULL);
853         }
854         /*
855          * ok, not bound to all so see if we can find a EP bound to this
856          * address.
857          */
858 #ifdef SCTP_DEBUG
859         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
860                 kprintf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
861         }
862 #endif
863         LIST_FOREACH(inp, head, sctp_hash) {
864                 SCTP_INP_RLOCK(inp);
865                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
866                         SCTP_INP_RUNLOCK(inp);
867                         continue;
868                 }
869                 /*
870                  * Ok this could be a likely candidate, look at all of
871                  * its addresses
872                  */
873                 if (inp->sctp_lport != lport) {
874                         SCTP_INP_RUNLOCK(inp);
875                         continue;
876                 }
877 #ifdef SCTP_DEBUG
878                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
879                         kprintf("Ok, found matching local port\n");
880                 }
881 #endif
882                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
883                         if (laddr->ifa == NULL) {
884 #ifdef SCTP_DEBUG
885                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
886                                         kprintf("An ounce of prevention is worth a pound of cure\n");
887                                 }
888 #endif
889                                 continue;
890                         }
891 #ifdef SCTP_DEBUG
892                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
893                                 kprintf("Ok laddr->ifa:%p is possible, ",
894                                     laddr->ifa);
895                         }
896 #endif
897                         if (laddr->ifa->ifa_addr == NULL) {
898 #ifdef SCTP_DEBUG
899                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
900                                         kprintf("Huh IFA as an ifa_addr=NULL, ");
901                                 }
902 #endif
903                                 continue;
904                         }
905 #ifdef SCTP_DEBUG
906                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
907                                 kprintf("Ok laddr->ifa:%p is possible, ",
908                                     laddr->ifa->ifa_addr);
909                                 sctp_print_address(laddr->ifa->ifa_addr);
910                                 kprintf("looking for ");
911                                 sctp_print_address(nam);
912                         }
913 #endif
914                         if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
915                                 /* possible, see if it matches */
916                                 struct sockaddr_in *intf_addr;
917                                 intf_addr = (struct sockaddr_in *)
918                                     laddr->ifa->ifa_addr;
919                                 if (nam->sa_family == AF_INET) {
920                                         if (sin->sin_addr.s_addr ==
921                                             intf_addr->sin_addr.s_addr) {
922 #ifdef SCTP_DEBUG
923                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
924                                                         kprintf("YES, return ep:%p\n", inp);
925                                                 }
926 #endif
927                                                 SCTP_INP_RUNLOCK(inp);
928                                                 return (inp);
929                                         }
930                                 } else if (nam->sa_family == AF_INET6) {
931                                         struct sockaddr_in6 *intf_addr6;
932                                         intf_addr6 = (struct sockaddr_in6 *)
933                                             laddr->ifa->ifa_addr;
934                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
935                                             &intf_addr6->sin6_addr)) {
936 #ifdef SCTP_DEBUG
937                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
938                                                         kprintf("YES, return ep:%p\n", inp);
939                                                 }
940 #endif
941                                                 SCTP_INP_RUNLOCK(inp);
942                                                 return (inp);
943                                         }
944                                 }
945                         }
946                         SCTP_INP_RUNLOCK(inp);
947                 }
948         }
949 #ifdef SCTP_DEBUG
950         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
951                 kprintf("NO, Falls out to NULL\n");
952         }
953 #endif
954         return (NULL);
955 }
956
957
958 struct sctp_inpcb *
959 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
960 {
961         /*
962          * First we check the hash table to see if someone has this port
963          * bound with just the port.
964          */
965         struct sctp_inpcb *inp;
966         struct sctppcbhead *head;
967         struct sockaddr_in *sin;
968         struct sockaddr_in6 *sin6;
969         int lport;
970 #ifdef SCTP_DEBUG
971         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
972                 kprintf("Looking for endpoint %d :",
973                        ntohs(((struct sockaddr_in *)nam)->sin_port));
974                 sctp_print_address(nam);
975         }
976 #endif
977         if (nam->sa_family == AF_INET) {
978                 sin = (struct sockaddr_in *)nam;
979                 lport = ((struct sockaddr_in *)nam)->sin_port;
980         } else if (nam->sa_family == AF_INET6) {
981                 sin6 = (struct sockaddr_in6 *)nam;
982                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
983         } else {
984                 /* unsupported family */
985                 return (NULL);
986         }
987         /*
988          * I could cheat here and just cast to one of the types but we will
989          * do it right. It also provides the check against an Unsupported
990          * type too.
991          */
992         /* Find the head of the ALLADDR chain */
993         if (have_lock == 0)
994                 SCTP_INP_INFO_RLOCK();
995         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
996                                                              sctppcbinfo.hashmark)];
997 #ifdef SCTP_DEBUG
998         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
999                 kprintf("Main hash to lookup at head:%p\n", head);
1000         }
1001 #endif
1002         inp = sctp_endpoint_probe(nam, head, lport);
1003
1004         /*
1005          * If the TCP model exists it could be that the main listening
1006          * endpoint is gone but there exists a connected socket for this
1007          * guy yet. If so we can return the first one that we find. This
1008          * may NOT be the correct one but the sctp_findassociation_ep_addr
1009          * has further code to look at all TCP models.
1010          */
1011         if (inp == NULL && find_tcp_pool) {
1012                 unsigned int i;
1013 #ifdef SCTP_DEBUG
1014                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1015                         kprintf("EP was NULL and TCP model is supported\n");
1016                 }
1017 #endif
1018                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1019                         /*
1020                          * This is real gross, but we do NOT have a remote
1021                          * port at this point depending on who is calling. We
1022                          * must therefore look for ANY one that matches our
1023                          * local port :/
1024                          */
1025                         head = &sctppcbinfo.sctp_tcpephash[i];
1026                         if (LIST_FIRST(head)) {
1027                                 inp = sctp_endpoint_probe(nam, head, lport);
1028                                 if (inp) {
1029                                         /* Found one */
1030                                         break;
1031                                 }
1032                         }
1033                 }
1034         }
1035 #ifdef SCTP_DEBUG
1036         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1037                 kprintf("EP to return is %p\n", inp);
1038         }
1039 #endif
1040         if (have_lock == 0) {
1041                 if (inp) {
1042                         SCTP_INP_WLOCK(inp);
1043                         SCTP_INP_INCR_REF(inp);
1044                         SCTP_INP_WUNLOCK(inp);
1045                 }
1046                 SCTP_INP_INFO_RUNLOCK();
1047         } else {
1048                 if (inp) {
1049                         SCTP_INP_WLOCK(inp);
1050                         SCTP_INP_INCR_REF(inp);
1051                         SCTP_INP_WUNLOCK(inp);
1052                 }
1053         }
1054         return (inp);
1055 }
1056
1057 /*
1058  * Find an association for an endpoint with the pointer to whom you want
1059  * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1060  * We may need to change the *to to some other struct like a mbuf...
1061  */
1062 struct sctp_tcb *
1063 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1064     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1065 {
1066         struct sctp_inpcb *inp;
1067         struct sctp_tcb *retval;
1068
1069         SCTP_INP_INFO_RLOCK();
1070         if (find_tcp_pool) {
1071                 if (inp_p != NULL) {
1072                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1073                 } else {
1074                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
1075                 }
1076                 if (retval != NULL) {
1077                         SCTP_INP_INFO_RUNLOCK();
1078                         return (retval);
1079                 }
1080         }
1081         inp = sctp_pcb_findep(to, 0, 1);
1082         if (inp_p != NULL) {
1083                 *inp_p = inp;
1084         }
1085         SCTP_INP_INFO_RUNLOCK();
1086
1087         if (inp == NULL) {
1088                 return (NULL);
1089         }
1090
1091         /*
1092          * ok, we have an endpoint, now lets find the assoc for it (if any)
1093          * we now place the source address or from in the to of the find
1094          * endpoint call. Since in reality this chain is used from the
1095          * inbound packet side.
1096          */
1097         if (inp_p != NULL) {
1098                 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1099         } else {
1100                 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1101         }
1102 }
1103
1104
1105 /*
1106  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1107  * find all addresses that the sender has specified in any address list.
1108  * Each address will be used to lookup the TCB and see if one exits.
1109  */
1110 static struct sctp_tcb *
1111 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1112     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1113     struct sockaddr *dest)
1114 {
1115         struct sockaddr_in sin4;
1116         struct sockaddr_in6 sin6;
1117         struct sctp_paramhdr *phdr, parm_buf;
1118         struct sctp_tcb *retval;
1119         u_int32_t ptype, plen;
1120
1121         memset(&sin4, 0, sizeof(sin4));
1122         memset(&sin6, 0, sizeof(sin6));
1123         sin4.sin_len = sizeof(sin4);
1124         sin4.sin_family = AF_INET;
1125         sin4.sin_port = sh->src_port;
1126         sin6.sin6_len = sizeof(sin6);
1127         sin6.sin6_family = AF_INET6;
1128         sin6.sin6_port = sh->src_port;
1129
1130         retval = NULL;
1131         offset += sizeof(struct sctp_init_chunk);
1132
1133         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1134         while (phdr != NULL) {
1135                 /* now we must see if we want the parameter */
1136                 ptype = ntohs(phdr->param_type);
1137                 plen = ntohs(phdr->param_length);
1138                 if (plen == 0) {
1139 #ifdef SCTP_DEBUG
1140                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1141                                 kprintf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1142                         }
1143 #endif /* SCTP_DEBUG */
1144                         break;
1145                 }
1146                 if (ptype == SCTP_IPV4_ADDRESS &&
1147                     plen == sizeof(struct sctp_ipv4addr_param)) {
1148                         /* Get the rest of the address */
1149                         struct sctp_ipv4addr_param ip4_parm, *p4;
1150
1151                         phdr = sctp_get_next_param(m, offset,
1152                             (struct sctp_paramhdr *)&ip4_parm, plen);
1153                         if (phdr == NULL) {
1154                                 return (NULL);
1155                         }
1156                         p4 = (struct sctp_ipv4addr_param *)phdr;
1157                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1158                         /* look it up */
1159                         retval = sctp_findassociation_ep_addr(inp_p,
1160                             (struct sockaddr *)&sin4, netp, dest, NULL);
1161                         if (retval != NULL) {
1162                                 return (retval);
1163                         }
1164                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1165                     plen == sizeof(struct sctp_ipv6addr_param)) {
1166                         /* Get the rest of the address */
1167                         struct sctp_ipv6addr_param ip6_parm, *p6;
1168
1169                         phdr = sctp_get_next_param(m, offset,
1170                             (struct sctp_paramhdr *)&ip6_parm, plen);
1171                         if (phdr == NULL) {
1172                                 return (NULL);
1173                         }
1174                         p6 = (struct sctp_ipv6addr_param *)phdr;
1175                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1176                         /* look it up */
1177                         retval = sctp_findassociation_ep_addr(inp_p,
1178                             (struct sockaddr *)&sin6, netp, dest, NULL);
1179                         if (retval != NULL) {
1180                                 return (retval);
1181                         }
1182                 }
1183                 offset += SCTP_SIZE32(plen);
1184                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1185                     sizeof(parm_buf));
1186         }
1187         return (NULL);
1188 }
1189
1190 static struct sctp_tcb *
1191 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1192     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1193     uint16_t lport)
1194 {
1195         /*
1196          * Use my vtag to hash. If we find it we then verify the source addr
1197          * is in the assoc. If all goes well we save a bit on rec of a packet.
1198          */
1199         struct sctpasochead *head;
1200         struct sctp_nets *net;
1201         struct sctp_tcb *stcb;
1202
1203         SCTP_INP_INFO_RLOCK();
1204         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1205             sctppcbinfo.hashasocmark)];
1206         if (head == NULL) {
1207                 /* invalid vtag */
1208                 SCTP_INP_INFO_RUNLOCK();
1209                 return (NULL);
1210         }
1211         LIST_FOREACH(stcb, head, sctp_asocs) {
1212                 SCTP_INP_RLOCK(stcb->sctp_ep);
1213                 SCTP_TCB_LOCK(stcb);
1214                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1215                 if (stcb->asoc.my_vtag == vtag) {
1216                         /* candidate */
1217                         if (stcb->rport != rport) {
1218                                 /*
1219                                  * we could remove this if vtags are unique
1220                                  * across the system.
1221                                  */
1222                                 SCTP_TCB_UNLOCK(stcb);
1223                                 continue;
1224                         }
1225                         if (stcb->sctp_ep->sctp_lport != lport) {
1226                                 /*
1227                                  * we could remove this if vtags are unique
1228                                  * across the system.
1229                                  */
1230                                 SCTP_TCB_UNLOCK(stcb);
1231                                 continue;
1232                         }
1233                         net = sctp_findnet(stcb, from);
1234                         if (net) {
1235                                 /* yep its him. */
1236                                 *netp = net;
1237                                 sctp_pegs[SCTP_VTAG_EXPR]++;
1238                                 *inp_p = stcb->sctp_ep;
1239                                 SCTP_INP_INFO_RUNLOCK();
1240                                 return (stcb);
1241                         } else {
1242                                 /* not him, this should only
1243                                  * happen in rare cases so
1244                                  * I peg it.
1245                                  */
1246                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
1247                         }
1248                 }
1249                 SCTP_TCB_UNLOCK(stcb);
1250         }
1251         SCTP_INP_INFO_RUNLOCK();
1252         return (NULL);
1253 }
1254
1255 /*
1256  * Find an association with the pointer to the inbound IP packet. This
1257  * can be a IPv4 or IPv6 packet.
1258  */
1259 struct sctp_tcb *
1260 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1261     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1262     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1263 {
1264         int find_tcp_pool;
1265         struct ip *iph;
1266         struct sctp_tcb *retval;
1267         struct sockaddr_storage to_store, from_store;
1268         struct sockaddr *to = (struct sockaddr *)&to_store;
1269         struct sockaddr *from = (struct sockaddr *)&from_store;
1270         struct sctp_inpcb *inp;
1271
1272
1273         iph = mtod(m, struct ip *);
1274         if (iph->ip_v == IPVERSION) {
1275                 /* its IPv4 */
1276                 struct sockaddr_in *to4, *from4;
1277
1278                 to4 = (struct sockaddr_in *)&to_store;
1279                 from4 = (struct sockaddr_in *)&from_store;
1280                 bzero(to4, sizeof(*to4));
1281                 bzero(from4, sizeof(*from4));
1282                 from4->sin_family = to4->sin_family = AF_INET;
1283                 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1284                 from4->sin_addr.s_addr  = iph->ip_src.s_addr;
1285                 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1286                 from4->sin_port = sh->src_port;
1287                 to4->sin_port = sh->dest_port;
1288         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1289                 /* its IPv6 */
1290                 struct ip6_hdr *ip6;
1291                 struct sockaddr_in6 *to6, *from6;
1292
1293                 ip6 = mtod(m, struct ip6_hdr *);
1294                 to6 = (struct sockaddr_in6 *)&to_store;
1295                 from6 = (struct sockaddr_in6 *)&from_store;
1296                 bzero(to6, sizeof(*to6));
1297                 bzero(from6, sizeof(*from6));
1298                 from6->sin6_family = to6->sin6_family = AF_INET6;
1299                 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1300                 to6->sin6_addr = ip6->ip6_dst;
1301                 from6->sin6_addr = ip6->ip6_src;
1302                 from6->sin6_port = sh->src_port;
1303                 to6->sin6_port = sh->dest_port;
1304                 /* Get the scopes in properly to the sin6 addr's */
1305                 in6_recoverscope(to6, &to6->sin6_addr, NULL);
1306 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1307                 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1308 #else
1309                 in6_embedscope(&to6->sin6_addr, to6);
1310 #endif
1311
1312                 in6_recoverscope(from6, &from6->sin6_addr, NULL);
1313 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1314                 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1315 #else
1316                 in6_embedscope(&from6->sin6_addr, from6);
1317 #endif
1318         } else {
1319                 /* Currently not supported. */
1320                 return (NULL);
1321         }
1322 #ifdef SCTP_DEBUG
1323         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1324                 kprintf("Looking for port %d address :",
1325                        ntohs(((struct sockaddr_in *)to)->sin_port));
1326                 sctp_print_address(to);
1327                 kprintf("From for port %d address :",
1328                        ntohs(((struct sockaddr_in *)from)->sin_port));
1329                 sctp_print_address(from);
1330         }
1331 #endif
1332
1333         if (sh->v_tag) {
1334                 /* we only go down this path if vtag is non-zero */
1335                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1336                     inp_p, netp, sh->src_port, sh->dest_port);
1337                 if (retval) {
1338                         return (retval);
1339                 }
1340         }
1341         find_tcp_pool = 0;
1342         if ((ch->chunk_type != SCTP_INITIATION) &&
1343             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1344             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1345             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1346                 /* Other chunk types go to the tcp pool. */
1347                 find_tcp_pool = 1;
1348         }
1349         if (inp_p) {
1350                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1351                     find_tcp_pool);
1352                 inp = *inp_p;
1353         } else {
1354                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1355                     find_tcp_pool);
1356         }
1357 #ifdef SCTP_DEBUG
1358         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1359                 kprintf("retval:%p inp:%p\n", retval, inp);
1360         }
1361 #endif
1362         if (retval == NULL && inp) {
1363                 /* Found a EP but not this address */
1364 #ifdef SCTP_DEBUG
1365                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1366                         kprintf("Found endpoint %p but no asoc - ep state:%x\n",
1367                             inp, inp->sctp_flags);
1368                 }
1369 #endif
1370                 if ((ch->chunk_type == SCTP_INITIATION) ||
1371                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1372                         /*
1373                          * special hook, we do NOT return linp or an
1374                          * association that is linked to an existing
1375                          * association that is under the TCP pool (i.e. no
1376                          * listener exists). The endpoint finding routine
1377                          * will always find a listner before examining the
1378                          * TCP pool.
1379                          */
1380                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1381 #ifdef SCTP_DEBUG
1382                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1383                                         kprintf("Gak, its in the TCP pool... return NULL");
1384                                 }
1385 #endif
1386                                 if (inp_p) {
1387                                         *inp_p = NULL;
1388                                 }
1389                                 return (NULL);
1390                         }
1391 #ifdef SCTP_DEBUG
1392                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1393                                 kprintf("Now doing SPECIAL find\n");
1394                         }
1395 #endif
1396                         retval = sctp_findassociation_special_addr(m, iphlen,
1397                             offset, sh, inp_p, netp, to);
1398                 }
1399         }
1400 #ifdef SCTP_DEBUG
1401         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1402             kprintf("retval is %p\n", retval);
1403         }
1404 #endif
1405         return (retval);
1406 }
1407
1408 extern int sctp_max_burst_default;
1409
1410 extern unsigned int sctp_delayed_sack_time_default;
1411 extern unsigned int sctp_heartbeat_interval_default;
1412 extern unsigned int sctp_pmtu_raise_time_default;
1413 extern unsigned int sctp_shutdown_guard_time_default;
1414 extern unsigned int sctp_secret_lifetime_default;
1415
1416 extern unsigned int sctp_rto_max_default;
1417 extern unsigned int sctp_rto_min_default;
1418 extern unsigned int sctp_rto_initial_default;
1419 extern unsigned int sctp_init_rto_max_default;
1420 extern unsigned int sctp_valid_cookie_life_default;
1421 extern unsigned int sctp_init_rtx_max_default;
1422 extern unsigned int sctp_assoc_rtx_max_default;
1423 extern unsigned int sctp_path_rtx_max_default;
1424 extern unsigned int sctp_nr_outgoing_streams_default;
1425
1426 /*
1427  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1428  * addresses. This way if we don't get a bind we by default pick a ephemeral
1429  * port with all addresses bound.
1430  */
1431 int
1432 sctp_inpcb_alloc(struct socket *so)
1433 {
1434         /*
1435          * we get called when a new endpoint starts up. We need to allocate
1436          * the sctp_inpcb structure from the zone and init it. Mark it as
1437          * unbound and find a port that we can use as an ephemeral with
1438          * INADDR_ANY. If the user binds later no problem we can then add
1439          * in the specific addresses. And setup the default parameters for
1440          * the EP.
1441          */
1442         int i, error;
1443         struct sctp_inpcb *inp, *n_inp;
1444         struct sctp_pcb *m;
1445         struct timeval time;
1446
1447         error = 0;
1448
1449         /* Hack alert:
1450          *
1451          * This code audits the entire INP list to see if
1452          * any ep's that are in the GONE state are now
1453          * all free. This should not happen really since when
1454          * the last association if freed we should end up deleting
1455          * the inpcb. This code including the locks should
1456          * be taken out ... since the last set of fixes I
1457          * have not seen the "Found a GONE on list" has not
1458          * came out. But i am paranoid and we will leave this
1459          * in at the cost of efficency on allocation of PCB's.
1460          * Probably we should move this to the invariant
1461          * compile options
1462          */
1463 /* #ifdef INVARIANTS*/
1464         SCTP_INP_INFO_RLOCK();
1465         inp = LIST_FIRST(&sctppcbinfo.listhead);
1466         while (inp) {
1467                 n_inp = LIST_NEXT(inp, sctp_list);
1468                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1469                         if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1470                                 /* finish the job now */
1471                                 kprintf("Found a GONE on list\n");
1472                                 SCTP_INP_INFO_RUNLOCK();
1473                                 sctp_inpcb_free(inp, 1);
1474                                 SCTP_INP_INFO_RLOCK();
1475                         }
1476                 }
1477                 inp = n_inp;
1478         }
1479         SCTP_INP_INFO_RUNLOCK();
1480 /* #endif INVARIANTS*/
1481
1482         SCTP_INP_INFO_WLOCK();
1483         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1484         if (inp == NULL) {
1485                 kprintf("Out of SCTP-INPCB structures - no resources\n");
1486                 SCTP_INP_INFO_WUNLOCK();
1487                 return (ENOBUFS);
1488         }
1489
1490         /* zap it */
1491         bzero(inp, sizeof(*inp));
1492
1493         /* bump generations */
1494         inp->ip_inp.inp.inp_socket = so;
1495
1496         /* setup socket pointers */
1497         inp->sctp_socket = so;
1498
1499         /* setup inpcb socket too */
1500         inp->ip_inp.inp.inp_socket = so;
1501         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1502 #ifdef IPSEC
1503 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1504         {
1505                 struct inpcbpolicy *pcb_sp = NULL;
1506                 error = ipsec_init_policy(so, &pcb_sp);
1507                 /* Arrange to share the policy */
1508                 inp->ip_inp.inp.inp_sp = pcb_sp;
1509                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1510         }
1511 #else
1512         /* not sure what to do for openbsd here */
1513         error = 0;
1514 #endif
1515         if (error != 0) {
1516                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1517                 SCTP_INP_INFO_WUNLOCK();
1518                 return error;
1519         }
1520 #endif /* IPSEC */
1521         sctppcbinfo.ipi_count_ep++;
1522 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1523         inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1524         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1525 #else
1526         inp->inp_ip_ttl = ip_defttl;
1527         inp->inp_ip_tos = 0;
1528 #endif
1529
1530         so->so_pcb = (caddr_t)inp;
1531
1532         if ((so->so_type == SOCK_DGRAM) ||
1533             (so->so_type == SOCK_SEQPACKET)) {
1534                 /* UDP style socket */
1535                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1536                     SCTP_PCB_FLAGS_UNBOUND);
1537                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1538         } else if (so->so_type == SOCK_STREAM) {
1539                 /* TCP style socket */
1540                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1541                     SCTP_PCB_FLAGS_UNBOUND);
1542                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1543         } else {
1544                 /*
1545                  * unsupported socket type (RAW, etc)- in case we missed
1546                  * it in protosw
1547                  */
1548                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1549                 SCTP_INP_INFO_WUNLOCK();
1550                 return (EOPNOTSUPP);
1551         }
1552         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1553 #ifdef __NetBSD__
1554             HASH_LIST,
1555 #endif
1556             M_PCB,
1557 #if defined(__NetBSD__) || defined(__OpenBSD__)
1558             M_WAITOK,
1559 #endif
1560             &inp->sctp_hashmark);
1561         if (inp->sctp_tcbhash == NULL) {
1562                 kprintf("Out of SCTP-INPCB->hashinit - no resources\n");
1563                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1564                 SCTP_INP_INFO_WUNLOCK();
1565                 return (ENOBUFS);
1566         }
1567         /* LOCK init's */
1568         SCTP_INP_LOCK_INIT(inp);
1569         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1570         /* lock the new ep */
1571         SCTP_INP_WLOCK(inp);
1572
1573         /* add it to the info area */
1574         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1575         SCTP_INP_INFO_WUNLOCK();
1576
1577         LIST_INIT(&inp->sctp_addr_list);
1578         LIST_INIT(&inp->sctp_asoc_list);
1579         TAILQ_INIT(&inp->sctp_queue_list);
1580         /* Init the timer structure for signature change */
1581 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1582         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1583 #else
1584         callout_init(&inp->sctp_ep.signature_change.timer);
1585 #endif
1586         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1587
1588         /* now init the actual endpoint default data */
1589         m = &inp->sctp_ep;
1590
1591         /* setup the base timeout information */
1592         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1593         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1594         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1595         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1596         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1597         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1598         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1599         /* all max/min max are in ms */
1600         m->sctp_maxrto = sctp_rto_max_default;
1601         m->sctp_minrto = sctp_rto_min_default;
1602         m->initial_rto = sctp_rto_initial_default;
1603         m->initial_init_rto_max = sctp_init_rto_max_default;
1604
1605         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1606
1607         m->max_init_times = sctp_init_rtx_max_default;
1608         m->max_send_times = sctp_assoc_rtx_max_default;
1609         m->def_net_failure = sctp_path_rtx_max_default;
1610         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1611         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1612         m->max_burst = sctp_max_burst_default;
1613         /* number of streams to pre-open on a association */
1614         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1615
1616         /* Add adaption cookie */
1617         m->adaption_layer_indicator = 0x504C5253;
1618
1619         /* seed random number generator */
1620         m->random_counter = 1;
1621         m->store_at = SCTP_SIGNATURE_SIZE;
1622 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1623         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1624 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1625         read_random(m->random_numbers, sizeof(m->random_numbers));
1626 #elif defined(__OpenBSD__)
1627         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1628 #elif defined(__NetBSD__) && NRND > 0
1629         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1630                          RND_EXTRACT_ANY);
1631 #else
1632         {
1633                 u_int32_t *ranm, *ranp;
1634                 ranp = (u_int32_t *)&m->random_numbers;
1635                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1636                 if ((u_long)ranp % 4) {
1637                         /* not a even boundary? */
1638                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1639                 }
1640                 while (ranp < ranm) {
1641                         *ranp = random();
1642                         ranp++;
1643                 }
1644         }
1645 #endif
1646         sctp_fill_random_store(m);
1647
1648         /* Minimum cookie size */
1649         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1650                 sizeof(struct sctp_state_cookie);
1651         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1652
1653         /* Setup the initial secret */
1654         SCTP_GETTIME_TIMEVAL(&time);
1655         m->time_of_secret_change = time.tv_sec;
1656
1657         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1658                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1659         }
1660         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1661
1662         /* How long is a cookie good for ? */
1663         m->def_cookie_life = sctp_valid_cookie_life_default;
1664         SCTP_INP_WUNLOCK(inp);
1665         return (error);
1666 }
1667
1668
1669 void
1670 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1671     struct sctp_tcb *stcb)
1672 {
1673         uint16_t lport, rport;
1674         struct sctppcbhead *head;
1675         struct sctp_laddr *laddr, *oladdr;
1676
1677         SCTP_TCB_UNLOCK(stcb);
1678         SCTP_INP_INFO_WLOCK();
1679         SCTP_INP_WLOCK(old_inp);
1680         SCTP_INP_WLOCK(new_inp);
1681         SCTP_TCB_LOCK(stcb);
1682
1683         new_inp->sctp_ep.time_of_secret_change =
1684             old_inp->sctp_ep.time_of_secret_change;
1685         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1686             sizeof(old_inp->sctp_ep.secret_key));
1687         new_inp->sctp_ep.current_secret_number =
1688             old_inp->sctp_ep.current_secret_number;
1689         new_inp->sctp_ep.last_secret_number =
1690             old_inp->sctp_ep.last_secret_number;
1691         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1692
1693         /* Copy the port across */
1694         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1695         rport = stcb->rport;
1696         /* Pull the tcb from the old association */
1697         LIST_REMOVE(stcb, sctp_tcbhash);
1698         LIST_REMOVE(stcb, sctp_tcblist);
1699
1700         /* Now insert the new_inp into the TCP connected hash */
1701         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1702             sctppcbinfo.hashtcpmark)];
1703
1704         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1705
1706         /* Now move the tcb into the endpoint list */
1707         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1708         /*
1709          * Question, do we even need to worry about the ep-hash since
1710          * we only have one connection? Probably not :> so lets
1711          * get rid of it and not suck up any kernel memory in that.
1712          */
1713         SCTP_INP_INFO_WUNLOCK();
1714         stcb->sctp_socket = new_inp->sctp_socket;
1715         stcb->sctp_ep = new_inp;
1716         if (new_inp->sctp_tcbhash != NULL) {
1717                 FREE(new_inp->sctp_tcbhash, M_PCB);
1718                 new_inp->sctp_tcbhash = NULL;
1719         }
1720         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1721                 /* Subset bound, so copy in the laddr list from the old_inp */
1722                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1723                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1724                             sctppcbinfo.ipi_zone_laddr);
1725                         if (laddr == NULL) {
1726                                 /*
1727                                  * Gak, what can we do? This assoc is really
1728                                  * HOSED. We probably should send an abort
1729                                  * here.
1730                                  */
1731 #ifdef SCTP_DEBUG
1732                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1733                                         kprintf("Association hosed in TCP model, out of laddr memory\n");
1734                                 }
1735 #endif /* SCTP_DEBUG */
1736                                 continue;
1737                         }
1738                         sctppcbinfo.ipi_count_laddr++;
1739                         sctppcbinfo.ipi_gencnt_laddr++;
1740                         bzero(laddr, sizeof(*laddr));
1741                         laddr->ifa = oladdr->ifa;
1742                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1743                             sctp_nxt_addr);
1744                         new_inp->laddr_count++;
1745                 }
1746         }
1747         SCTP_INP_WUNLOCK(new_inp);
1748         SCTP_INP_WUNLOCK(old_inp);
1749 }
1750
1751 static int
1752 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1753 {
1754         struct sctppcbhead *head;
1755         struct sctp_inpcb *t_inp;
1756
1757         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1758             sctppcbinfo.hashmark)];
1759         LIST_FOREACH(t_inp, head, sctp_hash) {
1760                 if (t_inp->sctp_lport != lport) {
1761                         continue;
1762                 }
1763                 /* This one is in use. */
1764                 /* check the v6/v4 binding issue */
1765                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1766 #if defined(__FreeBSD__)
1767                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1768 #else
1769 #if defined(__OpenBSD__)
1770                     (0) /* For open bsd we do dual bind only */
1771 #else
1772                     (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1773 #endif
1774 #endif
1775                         ) {
1776                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1777                                 /* collision in V6 space */
1778                                 return (1);
1779                         } else {
1780                                 /* inp is BOUND_V4 no conflict */
1781                                 continue;
1782                         }
1783                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1784                         /* t_inp is bound v4 and v6, conflict always */
1785                         return (1);
1786                 } else {
1787                         /* t_inp is bound only V4 */
1788                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1789 #if defined(__FreeBSD__)
1790                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1791 #else
1792 #if defined(__OpenBSD__)
1793                             (0) /* For open bsd we do dual bind only */
1794 #else
1795                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1796 #endif
1797 #endif
1798                                 ) {
1799                                 /* no conflict */
1800                                 continue;
1801                         }
1802                         /* else fall through to conflict */
1803                 }
1804                 return (1);
1805         }
1806         return (0);
1807 }
1808
1809 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1810 /*
1811  * Don't know why, but without this there is an unknown reference when
1812  * compiling NetBSD... hmm
1813  */
1814 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1815 #endif
1816
1817
1818 int
1819 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1820 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1821 #else
1822 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1823 #endif
1824 {
1825         /* bind a ep to a socket address */
1826         struct sctppcbhead *head;
1827         struct sctp_inpcb *inp, *inp_tmp;
1828         struct inpcb *ip_inp;
1829         int bindall;
1830         uint16_t lport;
1831         int error;
1832
1833         lport = 0;
1834         error = 0;
1835         bindall = 1;
1836         inp = (struct sctp_inpcb *)so->so_pcb;
1837         ip_inp = (struct inpcb *)so->so_pcb;
1838 #ifdef SCTP_DEBUG
1839         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1840                 if (addr) {
1841                         kprintf("Bind called port:%d\n",
1842                                ntohs(((struct sockaddr_in *)addr)->sin_port));
1843                         kprintf("Addr :");
1844                         sctp_print_address(addr);
1845                 }
1846         }
1847 #endif /* SCTP_DEBUG */
1848         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1849                 /* already did a bind, subsequent binds NOT allowed ! */
1850                 return (EINVAL);
1851         }
1852
1853         if (addr != NULL) {
1854                 if (addr->sa_family == AF_INET) {
1855                         struct sockaddr_in *sin;
1856
1857                         /* IPV6_V6ONLY socket? */
1858                         if (
1859 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1860                                 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1861 #else
1862 #if defined(__OpenBSD__)
1863                                 (0)     /* For openbsd we do dual bind only */
1864 #else
1865                                 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1866 #endif
1867 #endif
1868                                 ) {
1869                                 return (EINVAL);
1870                         }
1871
1872                         if (addr->sa_len != sizeof(*sin))
1873                                 return (EINVAL);
1874
1875                         sin = (struct sockaddr_in *)addr;
1876                         lport = sin->sin_port;
1877
1878                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1879                                 bindall = 0;
1880                         }
1881                 } else if (addr->sa_family == AF_INET6) {
1882                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1883                         struct sockaddr_in6 *sin6;
1884
1885                         sin6 = (struct sockaddr_in6 *)addr;
1886
1887                         if (addr->sa_len != sizeof(*sin6))
1888                                 return (EINVAL);
1889
1890                         lport = sin6->sin6_port;
1891                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1892                                 bindall = 0;
1893                                 /* KAME hack: embed scopeid */
1894 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1895                                 if (in6_embedscope(&sin6->sin6_addr, sin6,
1896                                     ip_inp, NULL) != 0)
1897                                         return (EINVAL);
1898 #elif defined(__FreeBSD__)
1899                                 error = scope6_check_id(sin6, ip6_use_defzone);
1900                                 if (error != 0)
1901                                         return (error);
1902 #else
1903                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1904                                         return (EINVAL);
1905                                 }
1906 #endif
1907                         }
1908 #ifndef SCOPEDROUTING
1909                         /* this must be cleared for ifa_ifwithaddr() */
1910                         sin6->sin6_scope_id = 0;
1911 #endif /* SCOPEDROUTING */
1912                 } else {
1913                         return (EAFNOSUPPORT);
1914                 }
1915         }
1916         SCTP_INP_INFO_WLOCK();
1917         SCTP_INP_WLOCK(inp);
1918         /* increase our count due to the unlock we do */
1919         SCTP_INP_INCR_REF(inp);
1920         if (lport) {
1921                 /*
1922                  * Did the caller specify a port? if so we must see if a
1923                  * ep already has this one bound.
1924                  */
1925                 /* got to be root to get at low ports */
1926                 if (ntohs(lport) < IPPORT_RESERVED) {
1927                         if (p && (error =
1928 #ifdef __FreeBSD__
1929 #if __FreeBSD_version >= 500000
1930                             suser_cred(p->td_ucred, 0)
1931 #else
1932                             suser(p)
1933 #endif
1934 #elif defined(__NetBSD__) || defined(__APPLE__)
1935                             suser(p->p_ucred, &p->p_acflag)
1936 #elif defined(__DragonFly__)
1937                             priv_check(p, PRIV_ROOT)
1938 #else
1939                             suser(p, 0)
1940 #endif
1941                             )) {
1942                                 SCTP_INP_DECR_REF(inp);
1943                                 SCTP_INP_WUNLOCK(inp);
1944                                 SCTP_INP_INFO_WUNLOCK();
1945                                 return (error);
1946                         }
1947                 }
1948                 if (p == NULL) {
1949                         SCTP_INP_DECR_REF(inp);
1950                         SCTP_INP_WUNLOCK(inp);
1951                         SCTP_INP_INFO_WUNLOCK();
1952                         return (error);
1953                 }
1954                 SCTP_INP_WUNLOCK(inp);
1955                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1956                 if (inp_tmp != NULL) {
1957                         /* lock guy returned and lower count
1958                          * note that we are not bound so inp_tmp
1959                          * should NEVER be inp. And it is this
1960                          * inp (inp_tmp) that gets the reference
1961                          * bump, so we must lower it.
1962                          */
1963                         SCTP_INP_WLOCK(inp_tmp);
1964                         SCTP_INP_DECR_REF(inp_tmp);
1965                         SCTP_INP_WUNLOCK(inp_tmp);
1966
1967                         /* unlock info */
1968                         SCTP_INP_INFO_WUNLOCK();
1969                         return (EADDRNOTAVAIL);
1970                 }
1971                 SCTP_INP_WLOCK(inp);
1972                 if (bindall) {
1973                         /* verify that no lport is not used by a singleton */
1974                         if (sctp_isport_inuse(inp, lport)) {
1975                                 /* Sorry someone already has this one bound */
1976                                 SCTP_INP_DECR_REF(inp);
1977                                 SCTP_INP_WUNLOCK(inp);
1978                                 SCTP_INP_INFO_WUNLOCK();
1979                                 return (EADDRNOTAVAIL);
1980                         }
1981                 }
1982         } else {
1983                 /*
1984                  * get any port but lets make sure no one has any address
1985                  * with this port bound
1986                  */
1987
1988                 /*
1989                  * setup the inp to the top (I could use the union but this
1990                  * is just as easy
1991                  */
1992                 uint32_t port_guess;
1993                 uint16_t port_attempt;
1994                 int not_done=1;
1995
1996                 while (not_done) {
1997                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1998                         port_attempt = (port_guess &  0x0000ffff);
1999                         if (port_attempt == 0) {
2000                                 goto next_half;
2001                         }
2002                         if (port_attempt < IPPORT_RESERVED) {
2003                                 port_attempt += IPPORT_RESERVED;
2004                         }
2005
2006                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2007                                 /* got a port we can use */
2008                                 not_done = 0;
2009                                 continue;
2010                         }
2011                         /* try upper half */
2012                 next_half:
2013                         port_attempt = ((port_guess >> 16) &  0x0000ffff);
2014                         if (port_attempt == 0) {
2015                                 goto last_try;
2016                         }
2017                         if (port_attempt < IPPORT_RESERVED) {
2018                                 port_attempt += IPPORT_RESERVED;
2019                         }
2020                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2021                                 /* got a port we can use */
2022                                 not_done = 0;
2023                                 continue;
2024                         }
2025                         /* try two half's added together */
2026                 last_try:
2027                         port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
2028                         if (port_attempt == 0) {
2029                                 /* get a new random number */
2030                                 continue;
2031                         }
2032                         if (port_attempt < IPPORT_RESERVED) {
2033                                 port_attempt += IPPORT_RESERVED;
2034                         }
2035                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2036                                 /* got a port we can use */
2037                                 not_done = 0;
2038                                 continue;
2039                         }
2040                 }
2041                 /* we don't get out of the loop until we have a port */
2042                 lport = htons(port_attempt);
2043         }
2044         SCTP_INP_DECR_REF(inp);
2045         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2046                 /* this really should not happen. The guy
2047                  * did a non-blocking bind and then did a close
2048                  * at the same time.
2049                  */
2050                 SCTP_INP_WUNLOCK(inp);
2051                 SCTP_INP_INFO_WUNLOCK();
2052                 return (EINVAL);
2053         }
2054         /* ok we look clear to give out this port, so lets setup the binding */
2055         if (bindall) {
2056                 /* binding to all addresses, so just set in the proper flags */
2057                 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2058                     SCTP_PCB_FLAGS_DO_ASCONF);
2059                 /* set the automatic addr changes from kernel flag */
2060                 if (sctp_auto_asconf == 0) {
2061                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2062                 } else {
2063                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2064                 }
2065         } else {
2066                 /*
2067                  * bind specific, make sure flags is off and add a new address
2068                  * structure to the sctp_addr_list inside the ep structure.
2069                  *
2070                  * We will need to allocate one and insert it at the head.
2071                  * The socketopt call can just insert new addresses in there
2072                  * as well. It will also have to do the embed scope kame hack
2073                  * too (before adding).
2074                  */
2075                 struct ifaddr *ifa;
2076                 struct sockaddr_storage store_sa;
2077
2078                 memset(&store_sa, 0, sizeof(store_sa));
2079                 if (addr->sa_family == AF_INET) {
2080                         struct sockaddr_in *sin;
2081
2082                         sin = (struct sockaddr_in *)&store_sa;
2083                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2084                         sin->sin_port = 0;
2085                 } else if (addr->sa_family == AF_INET6) {
2086                         struct sockaddr_in6 *sin6;
2087
2088                         sin6 = (struct sockaddr_in6 *)&store_sa;
2089                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2090                         sin6->sin6_port = 0;
2091                 }
2092                 /*
2093                  * first find the interface with the bound address
2094                  * need to zero out the port to find the address! yuck!
2095                  * can't do this earlier since need port for sctp_pcb_findep()
2096                  */
2097                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2098                 if (ifa == NULL) {
2099                         /* Can't find an interface with that address */
2100                         SCTP_INP_WUNLOCK(inp);
2101                         SCTP_INP_INFO_WUNLOCK();
2102                         return (EADDRNOTAVAIL);
2103                 }
2104                 if (addr->sa_family == AF_INET6) {
2105                         struct in6_ifaddr *ifa6;
2106                         ifa6 = (struct in6_ifaddr *)ifa;
2107                         /*
2108                          * allow binding of deprecated addresses as per
2109                          * RFC 2462 and ipng discussion
2110                          */
2111                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2112                             IN6_IFF_ANYCAST |
2113                             IN6_IFF_NOTREADY)) {
2114                                 /* Can't bind a non-existent addr. */
2115                                 SCTP_INP_WUNLOCK(inp);
2116                                 SCTP_INP_INFO_WUNLOCK();
2117                                 return (EINVAL);
2118                         }
2119                 }
2120                 /* we're not bound all */
2121                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2122 #if 0 /* use sysctl now */
2123                 /* don't allow automatic addr changes from kernel */
2124                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2125 #endif
2126                 /* set the automatic addr changes from kernel flag */
2127                 if (sctp_auto_asconf == 0) {
2128                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2129                 } else {
2130                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2131                 }
2132                 /* allow bindx() to send ASCONF's for binding changes */
2133                 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2134                 /* add this address to the endpoint list */
2135                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2136                 if (error != 0) {
2137                         SCTP_INP_WUNLOCK(inp);
2138                         SCTP_INP_INFO_WUNLOCK();
2139                         return (error);
2140                 }
2141                 inp->laddr_count++;
2142         }
2143         /* find the bucket */
2144         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2145             sctppcbinfo.hashmark)];
2146         /* put it in the bucket */
2147         LIST_INSERT_HEAD(head, inp, sctp_hash);
2148 #ifdef SCTP_DEBUG
2149         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2150                 kprintf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2151         }
2152 #endif
2153         /* set in the port */
2154         inp->sctp_lport = lport;
2155
2156         /* turn off just the unbound flag */
2157         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2158         SCTP_INP_WUNLOCK(inp);
2159         SCTP_INP_INFO_WUNLOCK();
2160         return (0);
2161 }
2162
2163
2164 static void
2165 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2166 {
2167         struct sctp_iterator *it;
2168         /* We enter with the only the ITERATOR_LOCK in place and
2169          * A write lock on the inp_info stuff.
2170          */
2171
2172         /* Go through all iterators, we must do this since
2173          * it is possible that some iterator does NOT have
2174          * the lock, but is waiting for it. And the one that
2175          * had the lock has either moved in the last iteration
2176          * or we just cleared it above. We need to find all
2177          * of those guys. The list of iterators should never
2178          * be very big though.
2179          */
2180         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2181                 if (it == inp->inp_starting_point_for_iterator)
2182                         /* skip this guy, he's special */
2183                         continue;
2184                 if (it->inp == inp) {
2185                         /* This is tricky and we DON'T lock the iterator.
2186                          * Reason is he's running but waiting for me since
2187                          * inp->inp_starting_point_for_iterator has the lock
2188                          * on me (the guy above we skipped). This tells us
2189                          * its is not running but waiting for inp->inp_starting_point_for_iterator
2190                          * to be released by the guy that does have our INP in a lock.
2191                          */
2192                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2193                                 it->inp = NULL;
2194                                 it->stcb = NULL;
2195                         } else {
2196                                 /* set him up to do the next guy not me */
2197                                 it->inp = inp_next;
2198                                 it->stcb = NULL;
2199                         }
2200                 }
2201         }
2202         it = inp->inp_starting_point_for_iterator;
2203         if (it) {
2204                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2205                         it->inp = NULL;
2206                 } else {
2207                         it->inp = inp_next;
2208                 }
2209                 it->stcb = NULL;
2210         }
2211 }
2212
2213 /* release sctp_inpcb unbind the port */
2214 void
2215 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2216 {
2217         /*
2218          * Here we free a endpoint. We must find it (if it is in the Hash
2219          * table) and remove it from there. Then we must also find it in
2220          * the overall list and remove it from there. After all removals are
2221          * complete then any timer has to be stopped. Then start the actual
2222          * freeing.
2223          * a) Any local lists.
2224          * b) Any associations.
2225          * c) The hash of all associations.
2226          * d) finally the ep itself.
2227          */
2228         struct sctp_pcb *m;
2229         struct sctp_inpcb *inp_save;
2230         struct sctp_tcb *asoc, *nasoc;
2231         struct sctp_laddr *laddr, *nladdr;
2232         struct inpcb *ip_pcb;
2233         struct socket *so;
2234         struct sctp_socket_q_list *sq;
2235 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2236         struct rtentry *rt;
2237 #endif
2238         int cnt;
2239
2240         crit_enter();
2241         SCTP_ASOC_CREATE_LOCK(inp);
2242         SCTP_INP_WLOCK(inp);
2243
2244         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2245                 /* been here before */
2246                 crit_exit();
2247                 kprintf("Endpoint was all gone (dup free)?\n");
2248                 SCTP_INP_WUNLOCK(inp);
2249                 SCTP_ASOC_CREATE_UNLOCK(inp);
2250                 return;
2251         }
2252         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2253
2254         if (inp->control) {
2255                 sctp_m_freem(inp->control);
2256                 inp->control = NULL;
2257         }
2258         if (inp->pkt) {
2259                 sctp_m_freem(inp->pkt);
2260                 inp->pkt = NULL;
2261         }
2262         so  = inp->sctp_socket;
2263         m = &inp->sctp_ep;
2264         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2265                                    * pointer here but I will
2266                                    * be nice :> (i.e. ip_pcb = ep;)
2267                                    */
2268
2269         if (immediate == 0) {
2270                 int cnt_in_sd;
2271                 cnt_in_sd = 0;
2272                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2273                      asoc = nasoc) {
2274                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2275                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2276                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2277                                 /* Just abandon things in the front states */
2278                                 SCTP_TCB_LOCK(asoc);
2279                                 SCTP_INP_WUNLOCK(inp);
2280                                 sctp_free_assoc(inp, asoc);
2281                                 SCTP_INP_WLOCK(inp);
2282                                 continue;
2283                         } else {
2284                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2285                         }
2286                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2287                             (asoc->asoc.size_on_reasm_queue > 0) ||
2288                             (asoc->asoc.size_on_all_streams > 0) ||
2289                             (so && (so->so_rcv.ssb_cc > 0))
2290                                 ) {
2291                                 /* Left with Data unread */
2292                                 struct mbuf *op_err;
2293                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2294                                 if (op_err) {
2295                                         /* Fill in the user initiated abort */
2296                                         struct sctp_paramhdr *ph;
2297                                         op_err->m_len =
2298                                             sizeof(struct sctp_paramhdr);
2299                                         ph = mtod(op_err,
2300                                             struct sctp_paramhdr *);
2301                                         ph->param_type = htons(
2302                                             SCTP_CAUSE_USER_INITIATED_ABT);
2303                                         ph->param_length = htons(op_err->m_len);
2304                                 }
2305                                 SCTP_TCB_LOCK(asoc);
2306                                 sctp_send_abort_tcb(asoc, op_err);
2307
2308                                 SCTP_INP_WUNLOCK(inp);
2309                                 sctp_free_assoc(inp, asoc);
2310                                 SCTP_INP_WLOCK(inp);
2311                                 continue;
2312                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2313                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2314                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2315                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2316                                         /* there is nothing queued to send, so I send shutdown */
2317                                         SCTP_TCB_LOCK(asoc);
2318                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2319                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2320                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2321                                                          asoc->asoc.primary_destination);
2322                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2323                                                          asoc->asoc.primary_destination);
2324                                         sctp_chunk_output(inp, asoc, 1);
2325                                         SCTP_TCB_UNLOCK(asoc);
2326                                 }
2327                         } else {
2328                                 /* mark into shutdown pending */
2329                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2330                         }
2331                         cnt_in_sd++;
2332                 }
2333                 /* now is there some left in our SHUTDOWN state? */
2334                 if (cnt_in_sd) {
2335                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2336                         crit_exit();
2337                         SCTP_INP_WUNLOCK(inp);
2338                         SCTP_ASOC_CREATE_UNLOCK(inp);
2339                         return;
2340                 }
2341         }
2342 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2343         if (inp->refcount) {
2344                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2345                 SCTP_INP_WUNLOCK(inp);
2346                 SCTP_ASOC_CREATE_UNLOCK(inp);
2347                 return;
2348         }
2349 #endif
2350         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2351 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2352         rt = ip_pcb->inp_route.ro_rt;
2353 #endif
2354
2355         callout_stop(&inp->sctp_ep.signature_change.timer);
2356
2357         if (so) {
2358         /* First take care of socket level things */
2359 #ifdef IPSEC
2360 #ifdef __OpenBSD__
2361         /* XXX IPsec cleanup here */
2362                 crit_enter();
2363                 if (ip_pcb->inp_tdb_in)
2364                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2365                                  ip_pcb, inp_tdb_in_next);
2366                 if (ip_pcb->inp_tdb_out)
2367                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2368                                  inp_tdb_out_next);
2369                 if (ip_pcb->inp_ipsec_localid)
2370                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2371                 if (ip_pcb->inp_ipsec_remoteid)
2372                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2373                 if (ip_pcb->inp_ipsec_localcred)
2374                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2375                 if (ip_pcb->inp_ipsec_remotecred)
2376                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2377                 if (ip_pcb->inp_ipsec_localauth)
2378                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2379                 if (ip_pcb->inp_ipsec_remoteauth)
2380                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2381                 crit_exit();
2382 #else
2383                 ipsec4_delete_pcbpolicy(ip_pcb);
2384 #endif
2385 #endif /*IPSEC*/
2386 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2387                 ACCEPT_LOCK();
2388                 SOCK_LOCK(so);
2389 #endif
2390                 so->so_pcb = 0;
2391 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2392                 sotryfree(so);
2393 #else
2394                 sofree(so);
2395 #endif
2396         }
2397
2398         if (ip_pcb->inp_options) {
2399                 m_free(ip_pcb->inp_options);
2400                 ip_pcb->inp_options = 0;
2401         }
2402 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2403         if (rt) {
2404                 RTFREE(rt);
2405                 ip_pcb->inp_route.ro_rt = 0;
2406         }
2407 #endif
2408         if (ip_pcb->inp_moptions) {
2409                 ip_freemoptions(ip_pcb->inp_moptions);
2410                 ip_pcb->inp_moptions = 0;
2411         }
2412 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2413         inp->inp_vflag = 0;
2414 #else
2415         ip_pcb->inp_vflag = 0;
2416 #endif
2417
2418         /* Now the sctp_pcb things */
2419
2420         /*
2421          * free each asoc if it is not already closed/free. we can't use
2422          * the macro here since le_next will get freed as part of the
2423          * sctp_free_assoc() call.
2424          */
2425         cnt = 0;
2426         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2427              asoc = nasoc) {
2428                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2429                 SCTP_TCB_LOCK(asoc);
2430                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2431                         struct mbuf *op_err;
2432                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2433                         if (op_err) {
2434                                 /* Fill in the user initiated abort */
2435                                 struct sctp_paramhdr *ph;
2436                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2437                                 ph = mtod(op_err, struct sctp_paramhdr *);
2438                                 ph->param_type = htons(
2439                                     SCTP_CAUSE_USER_INITIATED_ABT);
2440                                 ph->param_length = htons(op_err->m_len);
2441                         }
2442                         sctp_send_abort_tcb(asoc, op_err);
2443                 }
2444                 cnt++;
2445                 /*
2446                  * sctp_free_assoc() will call sctp_inpcb_free(),
2447                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2448                  * So, we clear it before sctp_free_assoc() making sure
2449                  * no double sctp_inpcb_free().
2450                  */
2451                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2452                 SCTP_INP_WUNLOCK(inp);
2453                 sctp_free_assoc(inp, asoc);
2454                 SCTP_INP_WLOCK(inp);
2455         }
2456         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2457                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2458                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2459                 sctppcbinfo.ipi_count_sockq--;
2460                 sctppcbinfo.ipi_gencnt_sockq++;
2461         }
2462         inp->sctp_socket = 0;
2463         /* Now first we remove ourselves from the overall list of all EP's */
2464
2465         /* Unlock inp first, need correct order */
2466         SCTP_INP_WUNLOCK(inp);
2467         /* now iterator lock */
2468         SCTP_ITERATOR_LOCK();
2469         /* now info lock */
2470         SCTP_INP_INFO_WLOCK();
2471         /* now reget the inp lock */
2472         SCTP_INP_WLOCK(inp);
2473
2474         inp_save = LIST_NEXT(inp, sctp_list);
2475         LIST_REMOVE(inp, sctp_list);
2476         /*
2477          * Now the question comes as to if this EP was ever bound at all.
2478          * If it was, then we must pull it out of the EP hash list.
2479          */
2480         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2481             SCTP_PCB_FLAGS_UNBOUND) {
2482                 /*
2483                  * ok, this guy has been bound. It's port is somewhere
2484                  * in the sctppcbinfo hash table. Remove it!
2485                  */
2486                 LIST_REMOVE(inp, sctp_hash);
2487         }
2488         /* fix any iterators only after out of the list */
2489         sctp_iterator_inp_being_freed(inp, inp_save);
2490         SCTP_ITERATOR_UNLOCK();
2491         /*
2492          * if we have an address list the following will free the list of
2493          * ifaddr's that are set into this ep. Again macro limitations here,
2494          * since the LIST_FOREACH could be a bad idea.
2495          */
2496         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2497              laddr = nladdr) {
2498                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2499                 LIST_REMOVE(laddr, sctp_nxt_addr);
2500                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2501                 sctppcbinfo.ipi_gencnt_laddr++;
2502                 sctppcbinfo.ipi_count_laddr--;
2503         }
2504         /* Now lets see about freeing the EP hash table. */
2505         if (inp->sctp_tcbhash != NULL) {
2506                 FREE(inp->sctp_tcbhash, M_PCB);
2507                 inp->sctp_tcbhash = 0;
2508         }
2509         SCTP_INP_WUNLOCK(inp);
2510         SCTP_ASOC_CREATE_UNLOCK(inp);
2511         SCTP_INP_LOCK_DESTROY(inp);
2512         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2513
2514         /* Now we must put the ep memory back into the zone pool */
2515         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2516         sctppcbinfo.ipi_count_ep--;
2517
2518         SCTP_INP_INFO_WUNLOCK();
2519         crit_exit();
2520 }
2521
2522
2523 struct sctp_nets *
2524 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2525 {
2526         struct sctp_nets *net;
2527         struct sockaddr_in *sin;
2528         struct sockaddr_in6 *sin6;
2529         /* use the peer's/remote port for lookup if unspecified */
2530         sin = (struct sockaddr_in *)addr;
2531         sin6 = (struct sockaddr_in6 *)addr;
2532 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2533         if (stcb->rport != sin->sin_port) {
2534                 /* we cheat and just a sin for this test */
2535                 return (NULL);
2536         }
2537 #endif
2538         /* locate the address */
2539         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2540                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2541                         return (net);
2542         }
2543         return (NULL);
2544 }
2545
2546
2547 /*
2548  * add's a remote endpoint address, done with the INIT/INIT-ACK
2549  * as well as when a ASCONF arrives that adds it. It will also
2550  * initialize all the cwnd stats of stuff.
2551  */
2552 int
2553 sctp_is_address_on_local_host(struct sockaddr *addr)
2554 {
2555         struct ifnet *ifn;
2556
2557         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2558                 struct ifaddr_container *ifac;
2559
2560                 TAILQ_FOREACH(ifac, &ifn->if_addrheads[mycpuid], ifa_link) {
2561                         struct ifaddr *ifa = ifac->ifa;
2562
2563                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2564                                 /* same family */
2565                                 if (addr->sa_family == AF_INET) {
2566                                         struct sockaddr_in *sin, *sin_c;
2567                                         sin = (struct sockaddr_in *)addr;
2568                                         sin_c = (struct sockaddr_in *)
2569                                             ifa->ifa_addr;
2570                                         if (sin->sin_addr.s_addr ==
2571                                             sin_c->sin_addr.s_addr) {
2572                                                 /* we are on the same machine */
2573                                                 return (1);
2574                                         }
2575                                 } else if (addr->sa_family == AF_INET6) {
2576                                         struct sockaddr_in6 *sin6, *sin_c6;
2577                                         sin6 = (struct sockaddr_in6 *)addr;
2578                                         sin_c6 = (struct sockaddr_in6 *)
2579                                             ifa->ifa_addr;
2580                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2581                                             &sin_c6->sin6_addr)) {
2582                                                 /* we are on the same machine */
2583                                                 return (1);
2584                                         }
2585                                 }
2586                         }
2587                 }
2588         }
2589         return (0);
2590 }
2591
2592 int
2593 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2594     int set_scope, int from)
2595 {
2596         /*
2597          * The following is redundant to the same lines in the
2598          * sctp_aloc_assoc() but is needed since other's call the add
2599          * address function
2600          */
2601         struct sctp_nets *net, *netfirst;
2602         int addr_inscope;
2603
2604 #ifdef SCTP_DEBUG
2605         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2606                 kprintf("Adding an address (from:%d) to the peer: ", from);
2607                 sctp_print_address(newaddr);
2608         }
2609 #endif
2610         netfirst = sctp_findnet(stcb, newaddr);
2611         if (netfirst) {
2612                 /*
2613                  * Lie and return ok, we don't want to make the association
2614                  * go away for this behavior. It will happen in the TCP model
2615                  * in a connected socket. It does not reach the hash table
2616                  * until after the association is built so it can't be found.
2617                  * Mark as reachable, since the initial creation will have
2618                  * been cleared and the NOT_IN_ASSOC flag will have been
2619                  * added... and we don't want to end up removing it back out.
2620                  */
2621                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2622                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2623                             SCTP_ADDR_UNCONFIRMED);
2624                 } else {
2625                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2626                 }
2627
2628                 return (0);
2629         }
2630         addr_inscope = 1;
2631         if (newaddr->sa_family == AF_INET) {
2632                 struct sockaddr_in *sin;
2633                 sin = (struct sockaddr_in *)newaddr;
2634                 if (sin->sin_addr.s_addr == 0) {
2635                         /* Invalid address */
2636                         return (-1);
2637                 }
2638                 /* zero out the bzero area */
2639                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2640
2641                 /* assure len is set */
2642                 sin->sin_len = sizeof(struct sockaddr_in);
2643                 if (set_scope) {
2644 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2645                         stcb->ipv4_local_scope = 1;
2646 #else
2647                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2648                                 stcb->asoc.ipv4_local_scope = 1;
2649                         }
2650 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2651
2652                         if (sctp_is_address_on_local_host(newaddr)) {
2653                                 stcb->asoc.loopback_scope = 1;
2654                                 stcb->asoc.ipv4_local_scope = 1;
2655                                 stcb->asoc.local_scope = 1;
2656                                 stcb->asoc.site_scope = 1;
2657                         }
2658                 } else {
2659                         if (from == 8) {
2660                                 /* From connectx */
2661                                 if (sctp_is_address_on_local_host(newaddr)) {
2662                                         stcb->asoc.loopback_scope = 1;
2663                                         stcb->asoc.ipv4_local_scope = 1;
2664                                         stcb->asoc.local_scope = 1;
2665                                         stcb->asoc.site_scope = 1;
2666                                 }
2667                         }
2668                         /* Validate the address is in scope */
2669                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2670                             (stcb->asoc.ipv4_local_scope == 0)) {
2671                                 addr_inscope = 0;
2672                         }
2673                 }
2674         } else if (newaddr->sa_family == AF_INET6) {
2675                 struct sockaddr_in6 *sin6;
2676                 sin6 = (struct sockaddr_in6 *)newaddr;
2677                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2678                         /* Invalid address */
2679                         return (-1);
2680                 }
2681                 /* assure len is set */
2682                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2683                 if (set_scope) {
2684                         if (sctp_is_address_on_local_host(newaddr)) {
2685                                 stcb->asoc.loopback_scope = 1;
2686                                 stcb->asoc.local_scope = 1;
2687                                 stcb->asoc.ipv4_local_scope = 1;
2688                                 stcb->asoc.site_scope = 1;
2689                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2690                                 /*
2691                                  * If the new destination is a LINK_LOCAL
2692                                  * we must have common site scope. Don't set
2693                                  * the local scope since we may not share all
2694                                  * links, only loopback can do this.
2695                                  * Links on the local network would also
2696                                  * be on our private network for v4 too.
2697                                  */
2698                                 stcb->asoc.ipv4_local_scope = 1;
2699                                 stcb->asoc.site_scope = 1;
2700                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2701                                 /*
2702                                  * If the new destination is SITE_LOCAL
2703                                  * then we must have site scope in common.
2704                                  */
2705                                 stcb->asoc.site_scope = 1;
2706                         }
2707                 } else {
2708                         if (from == 8) {
2709                                 /* From connectx */
2710                                 if (sctp_is_address_on_local_host(newaddr)) {
2711                                         stcb->asoc.loopback_scope = 1;
2712                                         stcb->asoc.ipv4_local_scope = 1;
2713                                         stcb->asoc.local_scope = 1;
2714                                         stcb->asoc.site_scope = 1;
2715                                 }
2716                         }
2717                         /* Validate the address is in scope */
2718                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2719                             (stcb->asoc.loopback_scope == 0)) {
2720                                 addr_inscope = 0;
2721                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2722                                    (stcb->asoc.local_scope == 0)) {
2723                                 addr_inscope = 0;
2724                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2725                                    (stcb->asoc.site_scope == 0)) {
2726                                 addr_inscope = 0;
2727                         }
2728                 }
2729         } else {
2730                 /* not supported family type */
2731                 return (-1);
2732         }
2733         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2734         if (net == NULL) {
2735                 return (-1);
2736         }
2737         sctppcbinfo.ipi_count_raddr++;
2738         sctppcbinfo.ipi_gencnt_raddr++;
2739         bzero(net, sizeof(*net));
2740         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2741         if (newaddr->sa_family == AF_INET) {
2742                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2743         } else if (newaddr->sa_family == AF_INET6) {
2744                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2745         }
2746         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2747         net->failure_threshold = stcb->asoc.def_net_failure;
2748         if (addr_inscope == 0) {
2749 #ifdef SCTP_DEBUG
2750                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2751                         kprintf("Adding an address which is OUT OF SCOPE\n");
2752                 }
2753 #endif /* SCTP_DEBUG */
2754                 net->dest_state = (SCTP_ADDR_REACHABLE |
2755                     SCTP_ADDR_OUT_OF_SCOPE);
2756         } else {
2757                 if (from == 8)
2758                         /* 8 is passed by connect_x */
2759                         net->dest_state = SCTP_ADDR_REACHABLE;
2760                 else
2761                         net->dest_state = SCTP_ADDR_REACHABLE |
2762                             SCTP_ADDR_UNCONFIRMED;
2763         }
2764         net->RTO = stcb->asoc.initial_rto;
2765         stcb->asoc.numnets++;
2766         net->ref_count = 1;
2767
2768         /* Init the timer structure */
2769 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2770         callout_init(&net->rxt_timer.timer, 0);
2771         callout_init(&net->pmtu_timer.timer, 0);
2772 #else
2773         callout_init(&net->rxt_timer.timer);
2774         callout_init(&net->pmtu_timer.timer);
2775 #endif
2776
2777         /* Now generate a route for this guy */
2778         /* KAME hack: embed scopeid */
2779         if (newaddr->sa_family == AF_INET6) {
2780                 struct sockaddr_in6 *sin6;
2781                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2782 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2783                 in6_embedscope(&sin6->sin6_addr, sin6,
2784                     &stcb->sctp_ep->ip_inp.inp, NULL);
2785 #else
2786                 in6_embedscope(&sin6->sin6_addr, sin6);
2787 #endif
2788 #ifndef SCOPEDROUTING
2789                 sin6->sin6_scope_id = 0;
2790 #endif
2791         }
2792 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2793         rtalloc_ign((struct route *)&net->ro, 0UL);
2794 #else
2795         rtalloc((struct route *)&net->ro);
2796 #endif
2797         if (newaddr->sa_family == AF_INET6) {
2798                 struct sockaddr_in6 *sin6;
2799                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2800                 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2801         }
2802         if ((net->ro.ro_rt) &&
2803             (net->ro.ro_rt->rt_ifp)) {
2804                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2805                 if (from == 1) {
2806                         stcb->asoc.smallest_mtu = net->mtu;
2807                 }
2808                 /* start things off to match mtu of interface please. */
2809                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2810         } else {
2811                 net->mtu = stcb->asoc.smallest_mtu;
2812         }
2813         if (stcb->asoc.smallest_mtu > net->mtu) {
2814                 stcb->asoc.smallest_mtu = net->mtu;
2815         }
2816         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2817          * We then limit this to 4 MTU's of sending.
2818          */
2819         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2820
2821         /* we always get at LEAST 2 MTU's */
2822         if (net->cwnd < (2 * net->mtu)) {
2823                 net->cwnd = 2 * net->mtu;
2824         }
2825
2826         net->ssthresh = stcb->asoc.peers_rwnd;
2827
2828         net->src_addr_selected = 0;
2829         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2830         if (net->ro.ro_rt == NULL) {
2831                 /* Since we have no route put it at the back */
2832                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2833         } else if (netfirst == NULL) {
2834                 /* We are the first one in the pool. */
2835                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2836         } else if (netfirst->ro.ro_rt == NULL) {
2837                 /*
2838                  * First one has NO route. Place this one ahead of the
2839                  * first one.
2840                  */
2841                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2842         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2843                 /*
2844                  * This one has a different interface than the one at the
2845                  * top of the list. Place it ahead.
2846                  */
2847                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2848         } else {
2849                 /*
2850                  * Ok we have the same interface as the first one. Move
2851                  * forward until we find either
2852                  *   a) one with a NULL route... insert ahead of that
2853                  *   b) one with a different ifp.. insert after that.
2854                  *   c) end of the list.. insert at the tail.
2855                  */
2856                 struct sctp_nets *netlook;
2857                 do {
2858                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2859                         if (netlook == NULL) {
2860                                 /* End of the list */
2861                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2862                                     sctp_next);
2863                                 break;
2864                         } else if (netlook->ro.ro_rt == NULL) {
2865                                 /* next one has NO route */
2866                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2867                                 break;
2868                         } else if (netlook->ro.ro_rt->rt_ifp !=
2869                                    net->ro.ro_rt->rt_ifp) {
2870                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2871                                     net, sctp_next);
2872                                 break;
2873                         }
2874                         /* Shift forward */
2875                         netfirst = netlook;
2876                 } while (netlook != NULL);
2877         }
2878         /* got to have a primary set */
2879         if (stcb->asoc.primary_destination == 0) {
2880                 stcb->asoc.primary_destination = net;
2881         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2882                    (net->ro.ro_rt)) {
2883                 /* No route to current primary adopt new primary */
2884                 stcb->asoc.primary_destination = net;
2885         }
2886         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2887             net);
2888
2889         return (0);
2890 }
2891
2892
2893 /*
2894  * allocate an association and add it to the endpoint. The caller must
2895  * be careful to add all additional addresses once they are know right
2896  * away or else the assoc will be may experience a blackout scenario.
2897  */
2898 struct sctp_tcb *
2899 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2900     int for_a_init, int *error,  uint32_t override_tag)
2901 {
2902         struct sctp_tcb *stcb;
2903         struct sctp_association *asoc;
2904         struct sctpasochead *head;
2905         uint16_t rport;
2906         int err;
2907
2908         /*
2909          * Assumption made here:
2910          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2911          *  to make sure the address does not exist already.
2912          */
2913         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2914                 /* Hit max assoc, sorry no more */
2915                 *error = ENOBUFS;
2916                 return (NULL);
2917         }
2918         SCTP_INP_RLOCK(inp);
2919         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2920                 /*
2921                  * If its in the TCP pool, its NOT allowed to create an
2922                  * association. The parent listener needs to call
2923                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2924                  * peeled off, or connected one does this.. its an error.
2925                  */
2926                 SCTP_INP_RUNLOCK(inp);
2927                 *error = EINVAL;
2928                 return (NULL);
2929         }
2930
2931 #ifdef SCTP_DEBUG
2932         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2933                 kprintf("Allocate an association for peer:");
2934                 if (firstaddr)
2935                         sctp_print_address(firstaddr);
2936                 else
2937                         kprintf("None\n");
2938                 kprintf("Port:%d\n",
2939                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2940         }
2941 #endif /* SCTP_DEBUG */
2942         if (firstaddr->sa_family == AF_INET) {
2943                 struct sockaddr_in *sin;
2944                 sin = (struct sockaddr_in *)firstaddr;
2945                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2946                         /* Invalid address */
2947 #ifdef SCTP_DEBUG
2948                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2949                                 kprintf("peer address invalid\n");
2950                         }
2951 #endif
2952                         SCTP_INP_RUNLOCK(inp);
2953                         *error = EINVAL;
2954                         return (NULL);
2955                 }
2956                 rport = sin->sin_port;
2957         } else if (firstaddr->sa_family == AF_INET6) {
2958                 struct sockaddr_in6 *sin6;
2959                 sin6 = (struct sockaddr_in6 *)firstaddr;
2960                 if ((sin6->sin6_port == 0) ||
2961                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2962                         /* Invalid address */
2963 #ifdef SCTP_DEBUG
2964                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2965                                 kprintf("peer address invalid\n");
2966                         }
2967 #endif
2968                         SCTP_INP_RUNLOCK(inp);
2969                         *error = EINVAL;
2970                         return (NULL);
2971                 }
2972                 rport = sin6->sin6_port;
2973         } else {
2974                 /* not supported family type */
2975 #ifdef SCTP_DEBUG
2976                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2977                         kprintf("BAD family %d\n", firstaddr->sa_family);
2978                 }
2979 #endif
2980                 SCTP_INP_RUNLOCK(inp);
2981                 *error = EINVAL;
2982                 return (NULL);
2983         }
2984         SCTP_INP_RUNLOCK(inp);
2985         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2986                 /*
2987                  * If you have not performed a bind, then we need to do
2988                  * the ephemerial bind for you.
2989                  */
2990 #ifdef SCTP_DEBUG
2991                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2992                         kprintf("Doing implicit BIND\n");
2993                 }
2994 #endif
2995
2996                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2997                     NULL,
2998 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2999                                            NULL
3000 #else
3001                                            NULL
3002 #endif
3003                              ))){
3004                         /* bind error, probably perm */
3005 #ifdef SCTP_DEBUG
3006                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3007                                 kprintf("BIND FAILS ret:%d\n", err);
3008                         }
3009 #endif
3010
3011                         *error = err;
3012                         return (NULL);
3013                 }
3014         }
3015         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3016         if (stcb == NULL) {
3017                 /* out of memory? */
3018 #ifdef SCTP_DEBUG
3019                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3020                         kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3021                 }
3022 #endif
3023                 *error = ENOMEM;
3024                 return (NULL);
3025         }
3026         sctppcbinfo.ipi_count_asoc++;
3027         sctppcbinfo.ipi_gencnt_asoc++;
3028
3029         bzero(stcb, sizeof(*stcb));
3030         asoc = &stcb->asoc;
3031         SCTP_TCB_LOCK_INIT(stcb);
3032         /* setup back pointer's */
3033         stcb->sctp_ep = inp;
3034         stcb->sctp_socket = inp->sctp_socket;
3035         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3036                 /* failed */
3037                 SCTP_TCB_LOCK_DESTROY (stcb);
3038                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3039                 sctppcbinfo.ipi_count_asoc--;
3040 #ifdef SCTP_DEBUG
3041                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3042                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3043                 }
3044 #endif
3045                 *error = err;
3046                 return (NULL);
3047         }
3048         /* and the port */
3049         stcb->rport = rport;
3050         SCTP_INP_INFO_WLOCK();
3051         SCTP_INP_WLOCK(inp);
3052         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3053                 /* inpcb freed while alloc going on */
3054                 SCTP_TCB_LOCK_DESTROY (stcb);
3055                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3056                 SCTP_INP_WUNLOCK(inp);
3057                 SCTP_INP_INFO_WUNLOCK();
3058                 sctppcbinfo.ipi_count_asoc--;
3059 #ifdef SCTP_DEBUG
3060                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3061                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3062                 }
3063 #endif
3064                 *error = EINVAL;
3065                 return (NULL);
3066         }
3067         SCTP_TCB_LOCK(stcb);
3068
3069         /* now that my_vtag is set, add it to the  hash */
3070         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3071              sctppcbinfo.hashasocmark)];
3072         /* put it in the bucket in the vtag hash of assoc's for the system */
3073         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3074         SCTP_INP_INFO_WUNLOCK();
3075
3076
3077         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3078                 /* failure.. memory error? */
3079                 if (asoc->strmout)
3080                         FREE(asoc->strmout, M_PCB);
3081                 if (asoc->mapping_array)
3082                         FREE(asoc->mapping_array, M_PCB);
3083
3084                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3085                 sctppcbinfo.ipi_count_asoc--;
3086 #ifdef SCTP_DEBUG
3087                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3088                         kprintf("aloc_assoc: couldn't add remote addr!\n");
3089                 }
3090 #endif
3091                 SCTP_TCB_LOCK_DESTROY (stcb);
3092                 *error = ENOBUFS;
3093                 return (NULL);
3094         }
3095         /* Init all the timers */
3096 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3097         callout_init(&asoc->hb_timer.timer, 0);
3098         callout_init(&asoc->dack_timer.timer, 0);
3099         callout_init(&asoc->asconf_timer.timer, 0);
3100         callout_init(&asoc->shut_guard_timer.timer, 0);
3101         callout_init(&asoc->autoclose_timer.timer, 0);
3102         callout_init(&asoc->delayed_event_timer.timer, 0);
3103 #else
3104         callout_init(&asoc->hb_timer.timer);
3105         callout_init(&asoc->dack_timer.timer);
3106         callout_init(&asoc->asconf_timer.timer);
3107         callout_init(&asoc->shut_guard_timer.timer);
3108         callout_init(&asoc->autoclose_timer.timer);
3109         callout_init(&asoc->delayed_event_timer.timer);
3110 #endif
3111         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3112         /* now file the port under the hash as well */
3113         if (inp->sctp_tcbhash != NULL) {
3114                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3115                    inp->sctp_hashmark)];
3116                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3117         }
3118         SCTP_INP_WUNLOCK(inp);
3119 #ifdef SCTP_DEBUG
3120         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3121                 kprintf("Association %p now allocated\n", stcb);
3122         }
3123 #endif
3124         return (stcb);
3125 }
3126
3127 void
3128 sctp_free_remote_addr(struct sctp_nets *net)
3129 {
3130         if (net == NULL)
3131                 return;
3132         net->ref_count--;
3133         if (net->ref_count <= 0) {
3134                 /* stop timer if running */
3135                 callout_stop(&net->rxt_timer.timer);
3136                 callout_stop(&net->pmtu_timer.timer);
3137                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3138                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3139                 sctppcbinfo.ipi_count_raddr--;
3140         }
3141 }
3142
3143 /*
3144  * remove a remote endpoint address from an association, it
3145  * will fail if the address does not exist.
3146  */
3147 int
3148 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3149 {
3150         /*
3151          * Here we need to remove a remote address. This is quite simple, we
3152          * first find it in the list of address for the association
3153          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3154          * that item.
3155          * Note we do not allow it to be removed if there are no other
3156          * addresses.
3157          */
3158         struct sctp_association *asoc;
3159         struct sctp_nets *net, *net_tmp;
3160         asoc = &stcb->asoc;
3161         if (asoc->numnets < 2) {
3162                 /* Must have at LEAST two remote addresses */
3163                 return (-1);
3164         }
3165         /* locate the address */
3166         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3167                 net_tmp = TAILQ_NEXT(net, sctp_next);
3168                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3169                         continue;
3170                 }
3171                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3172                     remaddr)) {
3173                         /* we found the guy */
3174                         asoc->numnets--;
3175                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3176                         sctp_free_remote_addr(net);
3177                         if (net == asoc->primary_destination) {
3178                                 /* Reset primary */
3179                                 struct sctp_nets *lnet;
3180                                 lnet = TAILQ_FIRST(&asoc->nets);
3181                                 /* Try to find a confirmed primary */
3182                                 asoc->primary_destination =
3183                                     sctp_find_alternate_net(stcb, lnet);
3184                         }
3185                         if (net == asoc->last_data_chunk_from) {
3186                                 /* Reset primary */
3187                                 asoc->last_data_chunk_from =
3188                                     TAILQ_FIRST(&asoc->nets);
3189                         }
3190                         if (net == asoc->last_control_chunk_from) {
3191                                 /* Reset primary */
3192                                 asoc->last_control_chunk_from =
3193                                     TAILQ_FIRST(&asoc->nets);
3194                         }
3195                         if (net == asoc->asconf_last_sent_to) {
3196                                 /* Reset primary */
3197                                 asoc->asconf_last_sent_to =
3198                                     TAILQ_FIRST(&asoc->nets);
3199                         }
3200                         return (0);
3201                 }
3202         }
3203         /* not found. */
3204         return (-2);
3205 }
3206
3207
3208 static void
3209 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3210 {
3211         struct sctpvtaghead *chain;
3212         struct sctp_tagblock *twait_block;
3213         struct timeval now;
3214         int set, i;
3215         SCTP_GETTIME_TIMEVAL(&now);
3216         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3217         set = 0;
3218         if (!LIST_EMPTY(chain)) {
3219                 /* Block(s) present, lets find space, and expire on the fly */
3220                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3221                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3222                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3223                                     !set) {
3224                                         twait_block->vtag_block[0].tv_sec_at_expire =
3225                                             now.tv_sec + SCTP_TIME_WAIT;
3226                                         twait_block->vtag_block[0].v_tag = tag;
3227                                         set = 1;
3228                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3229                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3230                                     now.tv_sec)) {
3231                                         /* Audit expires this guy */
3232                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3233                                         twait_block->vtag_block[i].v_tag = 0;
3234                                         if (set == 0) {
3235                                                 /* Reuse it for my new tag */
3236                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3237                                                 twait_block->vtag_block[0].v_tag = tag;
3238                                                 set = 1;
3239                                         }
3240                                 }
3241                         }
3242                         if (set) {
3243                                 /*
3244                                  * We only do up to the block where we can
3245                                  * place our tag for audits
3246                                  */
3247                                 break;
3248                         }
3249                 }
3250         }
3251         /* Need to add a new block to chain */
3252         if (!set) {
3253                 MALLOC(twait_block, struct sctp_tagblock *,
3254                        sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3255                 if (twait_block == NULL) {
3256                         return;
3257                 }
3258                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3259                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3260                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3261                     SCTP_TIME_WAIT;
3262                 twait_block->vtag_block[0].v_tag = tag;
3263         }
3264 }
3265
3266
3267 static void
3268 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3269 {
3270         struct sctp_iterator *it;
3271
3272
3273
3274         /* Unlock the tcb lock we do this so
3275          * we avoid a dead lock scenario where
3276          * the iterator is waiting on the TCB lock
3277          * and the TCB lock is waiting on the iterator
3278          * lock.
3279          */
3280         SCTP_ITERATOR_LOCK();
3281         SCTP_INP_INFO_WLOCK();
3282         SCTP_INP_WLOCK(inp);
3283         SCTP_TCB_LOCK(stcb);
3284
3285         it = stcb->asoc.stcb_starting_point_for_iterator;
3286         if (it == NULL) {
3287                 return;
3288         }
3289         if (it->inp != stcb->sctp_ep) {
3290                 /* hm, focused on the wrong one? */
3291                 return;
3292         }
3293         if (it->stcb != stcb) {
3294                 return;
3295         }
3296         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3297         if (it->stcb == NULL) {
3298                 /* done with all asoc's in this assoc */
3299                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3300                         it->inp = NULL;
3301                 } else {
3302
3303                         it->inp = LIST_NEXT(inp, sctp_list);
3304                 }
3305         }
3306 }
3307
3308 /*
3309  * Free the association after un-hashing the remote port.
3310  */
3311 void
3312 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3313 {
3314         struct sctp_association *asoc;
3315         struct sctp_nets *net, *prev;
3316         struct sctp_laddr *laddr;
3317         struct sctp_tmit_chunk *chk;
3318         struct sctp_asconf_addr *aparam;
3319         struct sctp_socket_q_list *sq;
3320
3321         /* first, lets purge the entry from the hash table. */
3322         crit_enter();
3323         if (stcb->asoc.state == 0) {
3324                 kprintf("Freeing already free association:%p - huh??\n",
3325                     stcb);
3326                 crit_exit();
3327                 return;
3328         }
3329         asoc = &stcb->asoc;
3330         asoc->state = 0;
3331         /* now clean up any other timers */
3332         callout_stop(&asoc->hb_timer.timer);
3333         callout_stop(&asoc->dack_timer.timer);
3334         callout_stop(&asoc->asconf_timer.timer);
3335         callout_stop(&asoc->shut_guard_timer.timer);
3336         callout_stop(&asoc->autoclose_timer.timer);
3337         callout_stop(&asoc->delayed_event_timer.timer);
3338         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3339                 callout_stop(&net->rxt_timer.timer);
3340                 callout_stop(&net->pmtu_timer.timer);
3341         }
3342
3343         /* Iterator asoc being freed we send an
3344          * unlocked TCB. It returns with INP_INFO
3345          * and INP write locked and the TCB locked
3346          * too and of course the iterator lock
3347          * in place as well..
3348          */
3349         SCTP_TCB_UNLOCK(stcb);
3350         sctp_iterator_asoc_being_freed(inp, stcb);
3351
3352         /* Null all of my entry's on the socket q */
3353         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3354                 if (sq->tcb == stcb) {
3355                         sq->tcb = NULL;
3356                 }
3357         }
3358
3359         if (inp->sctp_tcb_at_block == (void *)stcb) {
3360                 inp->error_on_block = ECONNRESET;
3361         }
3362
3363         if (inp->sctp_tcbhash) {
3364                 LIST_REMOVE(stcb, sctp_tcbhash);
3365         }
3366         /* Now lets remove it from the list of ALL associations in the EP */
3367         LIST_REMOVE(stcb, sctp_tcblist);
3368         SCTP_INP_WUNLOCK(inp);
3369         SCTP_ITERATOR_UNLOCK();
3370
3371
3372         /* pull from vtag hash */
3373         LIST_REMOVE(stcb, sctp_asocs);
3374
3375         /*
3376          * Now before we can free the assoc, we must  remove all of the
3377          * networks and any other allocated space.. i.e. add removes here
3378          * before the SCTP_ZONE_FREE() of the tasoc entry.
3379          */
3380
3381         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3382         SCTP_INP_INFO_WUNLOCK();
3383         prev = NULL;
3384         while (!TAILQ_EMPTY(&asoc->nets)) {
3385                 net = TAILQ_FIRST(&asoc->nets);
3386                 /* pull from list */
3387                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3388                         break;
3389                 }
3390                 prev = net;
3391                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3392                 /* free it */
3393                 net->ref_count = 0;
3394                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3395                 sctppcbinfo.ipi_count_raddr--;
3396         }
3397         /*
3398          * The chunk lists and such SHOULD be empty but we check them
3399          * just in case.
3400          */
3401         /* anything on the wheel needs to be removed */
3402         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3403                 struct sctp_stream_out *outs;
3404                 outs = TAILQ_FIRST(&asoc->out_wheel);
3405                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3406                 /* now clean up any chunks here */
3407                 chk = TAILQ_FIRST(&outs->outqueue);
3408                 while (chk) {
3409                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3410                         if (chk->data) {
3411                                 sctp_m_freem(chk->data);
3412                                 chk->data = NULL;
3413                         }
3414                         chk->whoTo = NULL;
3415                         chk->asoc = NULL;
3416                         /* Free the chunk */
3417                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3418                         sctppcbinfo.ipi_count_chunk--;
3419                         sctppcbinfo.ipi_gencnt_chunk++;
3420                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3421                                 panic("Chunk count is negative");
3422                         }
3423                         chk = TAILQ_FIRST(&outs->outqueue);
3424                 }
3425                 outs = TAILQ_FIRST(&asoc->out_wheel);
3426         }
3427
3428         if (asoc->pending_reply) {
3429                 FREE(asoc->pending_reply, M_PCB);
3430                 asoc->pending_reply = NULL;
3431         }
3432         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3433         while (chk) {
3434                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3435                 if (chk->data) {
3436                         sctp_m_freem(chk->data);
3437                         chk->data = NULL;
3438                 }
3439                 chk->whoTo = NULL;
3440                 chk->asoc = NULL;
3441                 /* Free the chunk */
3442                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3443                 sctppcbinfo.ipi_count_chunk--;
3444                 sctppcbinfo.ipi_gencnt_chunk++;
3445                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3446                         panic("Chunk count is negative");
3447                 }
3448                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3449         }
3450         /* pending send queue SHOULD be empty */
3451         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3452                 chk = TAILQ_FIRST(&asoc->send_queue);
3453                 while (chk) {
3454                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3455                         if (chk->data) {
3456                                 sctp_m_freem(chk->data);
3457                                 chk->data = NULL;
3458                         }
3459                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3460                         sctppcbinfo.ipi_count_chunk--;
3461                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3462                                 panic("Chunk count is negative");
3463                         }
3464                         sctppcbinfo.ipi_gencnt_chunk++;
3465                         chk = TAILQ_FIRST(&asoc->send_queue);
3466                 }
3467         }
3468         /* sent queue SHOULD be empty */
3469         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3470                 chk = TAILQ_FIRST(&asoc->sent_queue);
3471                 while (chk) {
3472                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3473                         if (chk->data) {
3474                                 sctp_m_freem(chk->data);
3475                                 chk->data = NULL;
3476                         }
3477                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3478                         sctppcbinfo.ipi_count_chunk--;
3479                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3480                                 panic("Chunk count is negative");
3481                         }
3482                         sctppcbinfo.ipi_gencnt_chunk++;
3483                         chk = TAILQ_FIRST(&asoc->sent_queue);
3484                 }
3485         }
3486         /* control queue MAY not be empty */
3487         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3488                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3489                 while (chk) {
3490                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3491                         if (chk->data) {
3492                                 sctp_m_freem(chk->data);
3493                                 chk->data = NULL;
3494                         }
3495                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3496                         sctppcbinfo.ipi_count_chunk--;
3497                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3498                                 panic("Chunk count is negative");
3499                         }
3500                         sctppcbinfo.ipi_gencnt_chunk++;
3501                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3502                 }
3503         }
3504         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3505                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3506                 while (chk) {
3507                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3508                         if (chk->data) {
3509                                 sctp_m_freem(chk->data);
3510                                 chk->data = NULL;
3511                         }
3512                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3513                         sctppcbinfo.ipi_count_chunk--;
3514                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3515                                 panic("Chunk count is negative");
3516                         }
3517                         sctppcbinfo.ipi_gencnt_chunk++;
3518                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3519                 }
3520         }
3521         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3522                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3523                 while (chk) {
3524                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3525                         if (chk->data) {
3526                                 sctp_m_freem(chk->data);
3527                                 chk->data = NULL;
3528                         }
3529                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3530                         sctppcbinfo.ipi_count_chunk--;
3531                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3532                                 panic("Chunk count is negative");
3533                         }
3534                         sctppcbinfo.ipi_gencnt_chunk++;
3535                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3536                 }
3537         }
3538         if (asoc->mapping_array) {
3539                 FREE(asoc->mapping_array, M_PCB);
3540                 asoc->mapping_array = NULL;
3541         }
3542
3543         /* the stream outs */
3544         if (asoc->strmout) {
3545                 FREE(asoc->strmout, M_PCB);
3546                 asoc->strmout = NULL;
3547         }
3548         asoc->streamoutcnt = 0;
3549         if (asoc->strmin) {
3550                 int i;
3551                 for (i = 0; i < asoc->streamincnt; i++) {
3552                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3553                                 /* We have somethings on the streamin queue */
3554                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3555                                 while (chk) {
3556                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3557                                             chk, sctp_next);
3558                                         if (chk->data) {
3559                                                 sctp_m_freem(chk->data);
3560                                                 chk->data = NULL;
3561                                         }
3562                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3563                                             chk);
3564                                         sctppcbinfo.ipi_count_chunk--;
3565                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3566                                                 panic("Chunk count is negative");
3567                                         }
3568                                         sctppcbinfo.ipi_gencnt_chunk++;
3569                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3570                                 }
3571                         }
3572                 }
3573                 FREE(asoc->strmin, M_PCB);
3574                 asoc->strmin = NULL;
3575         }
3576         asoc->streamincnt = 0;
3577         /* local addresses, if any */
3578         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3579                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3580                 LIST_REMOVE(laddr, sctp_nxt_addr);
3581                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3582                 sctppcbinfo.ipi_count_laddr--;
3583         }
3584         /* pending asconf (address) parameters */
3585         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3586                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3587                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3588                 FREE(aparam, M_PCB);
3589         }
3590         if (asoc->last_asconf_ack_sent != NULL) {
3591                 sctp_m_freem(asoc->last_asconf_ack_sent);
3592                 asoc->last_asconf_ack_sent = NULL;
3593         }
3594         /* Insert new items here :> */
3595
3596         /* Get rid of LOCK */
3597         SCTP_TCB_LOCK_DESTROY(stcb);
3598
3599         /* now clean up the tasoc itself */
3600         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3601         sctppcbinfo.ipi_count_asoc--;
3602         if ((inp->sctp_socket->so_snd.ssb_cc) ||
3603             (inp->sctp_socket->so_snd.ssb_mbcnt)) {
3604                 /* This will happen when a abort is done */
3605                 inp->sctp_socket->so_snd.ssb_cc = 0;
3606                 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
3607         }
3608         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3609                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3610                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3611                                 /*
3612                                  * For the base fd, that is NOT in TCP pool we
3613                            &n