243fa0ec2fec380294405a6d5519c3c31a281ef5
[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
3 /*
4  * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *      This product includes software developed by Cisco Systems, Inc.
18  * 4. Neither the name of the project nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 #if !(defined(__OpenBSD__) || defined(__APPLE__))
35 #include "opt_ipsec.h"
36 #endif
37 #if defined(__FreeBSD__) || defined(__DragonFly__)
38 #include "opt_compat.h"
39 #include "opt_inet6.h"
40 #include "opt_inet.h"
41 #endif
42 #if defined(__NetBSD__)
43 #include "opt_inet.h"
44 #endif
45 #ifdef __APPLE__
46 #include <sctp.h>
47 #elif !defined(__OpenBSD__)
48 #include "opt_sctp.h"
49 #endif
50
51 #include <sys/param.h>
52 #include <sys/systm.h>
53 #include <sys/malloc.h>
54 #include <sys/mbuf.h>
55 #include <sys/domain.h>
56 #include <sys/protosw.h>
57 #include <sys/socket.h>
58 #include <sys/socketvar.h>
59 #include <sys/proc.h>
60 #include <sys/priv.h>
61 #include <sys/kernel.h>
62 #include <sys/sysctl.h>
63 #include <sys/thread2.h>
64 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
65 #include <sys/random.h>
66 #endif
67 #if defined(__NetBSD__)
68 #include <sys/rnd.h>
69 #endif
70 #if defined(__OpenBSD__)
71 #include <dev/rndvar.h>
72 #endif
73
74 #if defined(__APPLE__)
75 #include <netinet/sctp_callout.h>
76 #elif defined(__OpenBSD__)
77 #include <sys/timeout.h>
78 #else
79 #include <sys/callout.h>
80 #endif
81
82 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000)
83 #include <sys/limits.h>
84 #else
85 #include <machine/limits.h>
86 #endif
87 #include <machine/cpu.h>
88
89 #include <net/if.h>
90 #include <net/if_types.h>
91 #include <net/route.h>
92 #include <netinet/in.h>
93 #include <netinet/in_systm.h>
94 #include <netinet/ip.h>
95 #include <netinet/in_pcb.h>
96 #include <netinet/in_var.h>
97 #include <netinet/ip_var.h>
98
99 #ifdef INET6
100 #include <netinet/ip6.h>
101 #include <netinet6/ip6_var.h>
102 #include <netinet6/scope6_var.h>
103 #if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
104 #include <netinet6/in6_pcb.h>
105 #elif defined(__OpenBSD__)
106 #include <netinet/in_pcb.h>
107 #endif
108 #endif /* INET6 */
109
110 #ifdef IPSEC
111 #ifndef __OpenBSD__
112 #include <netinet6/ipsec.h>
113 #include <netproto/key/key.h>
114 #else
115 #undef IPSEC
116 #endif
117 #endif /* IPSEC */
118
119 #include <netinet/sctp_var.h>
120 #include <netinet/sctp_pcb.h>
121 #include <netinet/sctputil.h>
122 #include <netinet/sctp.h>
123 #include <netinet/sctp_header.h>
124 #include <netinet/sctp_asconf.h>
125 #include <netinet/sctp_output.h>
126 #include <netinet/sctp_timer.h>
127
128 #ifndef SCTP_PCBHASHSIZE
129 /* default number of association hash buckets in each endpoint */
130 #define SCTP_PCBHASHSIZE 256
131 #endif
132
133 #ifdef SCTP_DEBUG
134 u_int32_t sctp_debug_on = 0;
135 #endif /* SCTP_DEBUG */
136
137 u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
138
139 int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
140
141 struct sctp_epinfo sctppcbinfo;
142
143 /* FIX: we don't handle multiple link local scopes */
144 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
145 int
146 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
147 {
148         struct in6_addr tmp_a, tmp_b;
149         /* use a copy of a and b */
150         tmp_a = *a;
151         tmp_b = *b;
152         in6_clearscope(&tmp_a);
153         in6_clearscope(&tmp_b);
154         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
155 }
156
157 #ifdef __OpenBSD__
158 extern int ipport_firstauto;
159 extern int ipport_lastauto;
160 extern int ipport_hifirstauto;
161 extern int ipport_hilastauto;
162 #endif
163
164 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
165
166 #ifndef xyzzy
167 void sctp_validate_no_locks(void);
168
169 void
170 SCTP_INP_RLOCK(struct sctp_inpcb *inp)
171 {
172         struct sctp_tcb *stcb;
173         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
174                 if (mtx_owned(&(stcb)->tcb_mtx))
175                         panic("I own TCB lock?");
176         }
177         if (mtx_owned(&(inp)->inp_mtx))
178                 panic("INP Recursive Lock-R");
179         mtx_lock(&(inp)->inp_mtx);
180 }
181
182 void
183 SCTP_INP_WLOCK(struct sctp_inpcb *inp)
184 {
185         SCTP_INP_RLOCK(inp);
186 }
187
188 void
189 SCTP_INP_INFO_RLOCK(void)
190 {
191         struct sctp_inpcb *inp;
192         struct sctp_tcb *stcb;
193         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
194                 if (mtx_owned(&(inp)->inp_mtx))
195                         panic("info-lock and own inp lock?");
196                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
197                         if (mtx_owned(&(stcb)->tcb_mtx))
198                                 panic("Info lock and own a tcb lock?");
199                 }
200         }
201         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
202                 panic("INP INFO Recursive Lock-R");
203         mtx_lock(&sctppcbinfo.ipi_ep_mtx);
204 }
205
206 void
207 SCTP_INP_INFO_WLOCK(void)
208 {
209         SCTP_INP_INFO_RLOCK();
210 }
211
212
213 void sctp_validate_no_locks(void)
214 {
215         struct sctp_inpcb *inp;
216         struct sctp_tcb *stcb;
217
218         if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
219                 panic("INP INFO lock is owned?");
220
221         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
222                 if (mtx_owned(&(inp)->inp_mtx))
223                         panic("You own an INP lock?");
224                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
225                         if (mtx_owned(&(stcb)->tcb_mtx))
226                                 panic("You own a TCB lock?");
227                 }
228         }
229 }
230
231 #endif
232 #endif
233
234 void
235 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
236 {
237         /* We really don't need
238          * to lock this, but I will
239          * just because it does not hurt.
240          */
241         SCTP_INP_INFO_RLOCK();
242         spcb->ep_count = sctppcbinfo.ipi_count_ep;
243         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
244         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
245         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
246         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
247         spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
248         spcb->mbuf_track = sctppcbinfo.mbuf_track;
249         SCTP_INP_INFO_RUNLOCK();
250 }
251
252
253 /*
254  * Notes on locks for FreeBSD 5 and up. All association
255  * lookups that have a definte ep, the INP structure is
256  * assumed to be locked for reading. If we need to go
257  * find the INP (ususally when a **inp is passed) then
258  * we must lock the INFO structure first and if needed
259  * lock the INP too. Note that if we lock it we must
260  *
261  */
262
263
264 /*
265  * Given a endpoint, look and find in its association list any association
266  * with the "to" address given. This can be a "from" address, too, for
267  * inbound packets. For outbound packets it is a true "to" address.
268  */
269 static struct sctp_tcb *
270 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
271                         struct sockaddr *to, struct sctp_nets **netp)
272 {
273         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
274
275         /*
276          * Note for this module care must be taken when observing what to is
277          * for. In most of the rest of the code the TO field represents my
278          * peer and the FROM field represents my address. For this module it
279          * is reversed of that.
280          */
281         /*
282          * If we support the TCP model, then we must now dig through to
283          * see if we can find our endpoint in the list of tcp ep's.
284          */
285         uint16_t lport, rport;
286         struct sctppcbhead *ephead;
287         struct sctp_inpcb *inp;
288         struct sctp_laddr *laddr;
289         struct sctp_tcb *stcb;
290         struct sctp_nets *net;
291
292         if ((to == NULL) || (from == NULL)) {
293                 return (NULL);
294         }
295
296         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
297                 lport = ((struct sockaddr_in *)to)->sin_port;
298                 rport = ((struct sockaddr_in *)from)->sin_port;
299         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
300                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
301                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
302         } else {
303                 return NULL;
304         }
305         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
306                                                      (lport + rport), sctppcbinfo.hashtcpmark)];
307         /*
308          * Ok now for each of the guys in this bucket we must look
309          * and see:
310          *  - Does the remote port match.
311          *  - Does there single association's addresses match this
312          *    address (to).
313          * If so we update p_ep to point to this ep and return the
314          * tcb from it.
315          */
316         LIST_FOREACH(inp, ephead, sctp_hash) {
317                 if (lport != inp->sctp_lport) {
318                         continue;
319                 }
320                 SCTP_INP_RLOCK(inp);
321                 /* check to see if the ep has one of the addresses */
322                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
323                         /* We are NOT bound all, so look further */
324                         int match = 0;
325
326                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
327                                 if (laddr->ifa == NULL) {
328 #ifdef SCTP_DEBUG
329                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
330                                                 kprintf("An ounce of prevention is worth a pound of cure\n");
331                                         }
332 #endif
333                                         continue;
334                                 }
335                                 if (laddr->ifa->ifa_addr == NULL) {
336 #ifdef SCTP_DEBUG
337                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
338                                                 kprintf("ifa with a NULL address\n");
339                                         }
340 #endif
341                                         continue;
342                                 }
343                                 if (laddr->ifa->ifa_addr->sa_family ==
344                                     to->sa_family) {
345                                         /* see if it matches */
346                                         struct sockaddr_in *intf_addr, *sin;
347                                         intf_addr = (struct sockaddr_in *)
348                                                 laddr->ifa->ifa_addr;
349                                         sin = (struct sockaddr_in *)to;
350                                         if (from->sa_family == AF_INET) {
351                                                 if (sin->sin_addr.s_addr ==
352                                                     intf_addr->sin_addr.s_addr) {
353                                                         match = 1;
354                                                         SCTP_INP_RUNLOCK(inp);
355                                                         break;
356                                                 }
357                                         } else {
358                                                 struct sockaddr_in6 *intf_addr6;
359                                                 struct sockaddr_in6 *sin6;
360                                                 sin6 = (struct sockaddr_in6 *)
361                                                         to;
362                                                 intf_addr6 = (struct sockaddr_in6 *)
363                                                         laddr->ifa->ifa_addr;
364
365                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
366                                                                          &intf_addr6->sin6_addr)) {
367                                                         match = 1;
368                                                         SCTP_INP_RUNLOCK(inp);
369                                                         break;
370                                                 }
371                                         }
372                                 }
373                         }
374                         if (match == 0) {
375                                 /* This endpoint does not have this address */
376                                 SCTP_INP_RUNLOCK(inp);
377                                 continue;
378                         }
379                 }
380                 /*
381                  * Ok if we hit here the ep has the address, does it hold the
382                  * tcb?
383                  */
384
385                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
386                 if (stcb == NULL) {
387                         SCTP_INP_RUNLOCK(inp);
388                         continue;
389                 }
390                 SCTP_TCB_LOCK(stcb);
391                 if (stcb->rport != rport) {
392                         /* remote port does not match. */
393                         SCTP_TCB_UNLOCK(stcb);
394                         SCTP_INP_RUNLOCK(inp);
395                         continue;
396                 }
397                 /* Does this TCB have a matching address? */
398                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
399                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
400                                 /* not the same family, can't be a match */
401                                 continue;
402                         }
403                         if (from->sa_family == AF_INET) {
404                                 struct sockaddr_in *sin, *rsin;
405                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
406                                 rsin = (struct sockaddr_in *)from;
407                                 if (sin->sin_addr.s_addr ==
408                                     rsin->sin_addr.s_addr) {
409                                         /* found it */
410                                         if (netp != NULL) {
411                                                 *netp = net;
412                                         }
413                                         /* Update the endpoint pointer */
414                                         *inp_p = inp;
415                                         SCTP_INP_RUNLOCK(inp);
416                                         return (stcb);
417                                 }
418                         } else {
419                                 struct sockaddr_in6 *sin6, *rsin6;
420                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
421                                 rsin6 = (struct sockaddr_in6 *)from;
422                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
423                                                          &rsin6->sin6_addr)) {
424                                         /* found it */
425                                         if (netp != NULL) {
426                                                 *netp = net;
427                                         }
428                                         /* Update the endpoint pointer */
429                                         *inp_p = inp;
430                                         SCTP_INP_RUNLOCK(inp);
431                                         return (stcb);
432                                 }
433                         }
434                 }
435                 SCTP_TCB_UNLOCK(stcb);
436
437                 SCTP_INP_RUNLOCK(inp);
438         }
439         return (NULL);
440 }
441
442 struct sctp_tcb *
443 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
444     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
445 {
446         struct sctp_tcb *stcb;
447         struct sockaddr_in *sin;
448         struct sockaddr_in6 *sin6;
449         struct sockaddr_storage local_store, remote_store;
450         struct ip *iph;
451         struct sctp_paramhdr parm_buf, *phdr;
452         int ptype;
453
454         memset(&local_store, 0, sizeof(local_store));
455         memset(&remote_store, 0, sizeof(remote_store));
456
457         /* First get the destination address setup too. */
458         iph = mtod(m, struct ip *);
459         if (iph->ip_v == IPVERSION) {
460                 /* its IPv4 */
461                 sin = (struct sockaddr_in *)&local_store;
462                 sin->sin_family = AF_INET;
463                 sin->sin_len = sizeof(*sin);
464                 sin->sin_port = sh->dest_port;
465                 sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
466         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
467                 /* its IPv6 */
468                 struct ip6_hdr *ip6;
469                 ip6 = mtod(m, struct ip6_hdr *);
470                 sin6 = (struct sockaddr_in6 *)&local_store;
471                 sin6->sin6_family = AF_INET6;
472                 sin6->sin6_len = sizeof(*sin6);
473                 sin6->sin6_port = sh->dest_port;
474                 sin6->sin6_addr = ip6->ip6_dst;
475         } else {
476                 return NULL;
477         }
478
479         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
480             &parm_buf, sizeof(struct sctp_paramhdr));
481         if (phdr == NULL) {
482 #ifdef SCTP_DEBUG
483                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
484                         kprintf("sctp_process_control: failed to get asconf lookup addr\n");
485                 }
486 #endif /* SCTP_DEBUG */
487                 return NULL;
488         }
489         ptype = (int)((u_int)ntohs(phdr->param_type));
490         /* get the correlation address */
491         if (ptype == SCTP_IPV6_ADDRESS) {
492                 /* ipv6 address param */
493                 struct sctp_ipv6addr_param *p6, p6_buf;
494                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
495                         return NULL;
496                 }
497
498                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
499                     offset + sizeof(struct sctp_asconf_chunk),
500                     &p6_buf.ph, sizeof(*p6));
501                 if (p6 == NULL) {
502 #ifdef SCTP_DEBUG
503                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
504                                 kprintf("sctp_process_control: failed to get asconf v6 lookup addr\n");
505                         }
506 #endif /* SCTP_DEBUG */
507                         return (NULL);
508                 }
509                 sin6 = (struct sockaddr_in6 *)&remote_store;
510                 sin6->sin6_family = AF_INET6;
511                 sin6->sin6_len = sizeof(*sin6);
512                 sin6->sin6_port = sh->src_port;
513                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
514         } else if (ptype == SCTP_IPV4_ADDRESS) {
515                 /* ipv4 address param */
516                 struct sctp_ipv4addr_param *p4, p4_buf;
517                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
518                         return NULL;
519                 }
520
521                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
522                     offset + sizeof(struct sctp_asconf_chunk),
523                     &p4_buf.ph, sizeof(*p4));
524                 if (p4 == NULL) {
525 #ifdef SCTP_DEBUG
526                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
527                                 kprintf("sctp_process_control: failed to get asconf v4 lookup addr\n");
528                         }
529 #endif /* SCTP_DEBUG */
530                         return (NULL);
531                 }
532                 sin = (struct sockaddr_in *)&remote_store;
533                 sin->sin_family = AF_INET;
534                 sin->sin_len = sizeof(*sin);
535                 sin->sin_port = sh->src_port;
536                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
537         } else {
538                 /* invalid address param type */
539                 return NULL;
540         }
541
542         stcb = sctp_findassociation_ep_addr(inp_p,
543             (struct sockaddr *)&remote_store, netp,
544             (struct sockaddr *)&local_store, NULL);
545         return (stcb);
546 }
547
548 struct sctp_tcb *
549 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
550     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
551 {
552         struct sctpasochead *head;
553         struct sctp_inpcb *inp;
554         struct sctp_tcb *stcb;
555         struct sctp_nets *net;
556         uint16_t rport;
557
558         inp = *inp_p;
559         if (remote->sa_family == AF_INET) {
560                 rport = (((struct sockaddr_in *)remote)->sin_port);
561         } else if (remote->sa_family == AF_INET6) {
562                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
563         } else {
564                 return (NULL);
565         }
566         if (locked_tcb) {
567                 /* UN-lock so we can do proper locking here
568                  * this occurs when called from load_addresses_from_init.
569                  */
570                 SCTP_TCB_UNLOCK(locked_tcb);
571         }
572         SCTP_INP_INFO_RLOCK();
573         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
574                 /*
575                  * Now either this guy is our listner or it's the connector.
576                  * If it is the one that issued the connect, then it's only
577                  * chance is to be the first TCB in the list. If it is the
578                  * acceptor, then do the special_lookup to hash and find the
579                  * real inp.
580                  */
581                 if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
582                         /* to is peer addr, from is my addr */
583                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
584                                                        netp);
585                         if ((stcb != NULL) && (locked_tcb == NULL)){
586                                 /* we have a locked tcb, lower refcount */
587                                 SCTP_INP_WLOCK(inp);
588                                 SCTP_INP_DECR_REF(inp);
589                                 SCTP_INP_WUNLOCK(inp);
590                         }
591                         if (locked_tcb != NULL) {
592                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
593                                 SCTP_TCB_LOCK(locked_tcb);
594                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
595                                 if (stcb != NULL)
596                                         SCTP_TCB_UNLOCK(stcb);
597                         }
598                         SCTP_INP_INFO_RUNLOCK();
599                         return (stcb);
600                 } else {
601                         SCTP_INP_WLOCK(inp);
602                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
603                         if (stcb == NULL) {
604                                 goto null_return;
605                         }
606                         SCTP_TCB_LOCK(stcb);
607                         if (stcb->rport != rport) {
608                                 /* remote port does not match. */
609                                 SCTP_TCB_UNLOCK(stcb);
610                                 goto null_return;
611                         }
612                         /* now look at the list of remote addresses */
613                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
614                                 if (net->ro._l_addr.sa.sa_family !=
615                                     remote->sa_family) {
616                                         /* not the same family */
617                                         continue;
618                                 }
619                                 if (remote->sa_family == AF_INET) {
620                                         struct sockaddr_in *sin, *rsin;
621                                         sin = (struct sockaddr_in *)
622                                                 &net->ro._l_addr;
623                                         rsin = (struct sockaddr_in *)remote;
624                                         if (sin->sin_addr.s_addr ==
625                                             rsin->sin_addr.s_addr) {
626                                                 /* found it */
627                                                 if (netp != NULL) {
628                                                         *netp = net;
629                                                 }
630                                                 if (locked_tcb == NULL) {
631                                                         SCTP_INP_DECR_REF(inp);
632                                                 }
633                                                 SCTP_INP_WUNLOCK(inp);
634                                                 SCTP_INP_INFO_RUNLOCK();
635                                                 return (stcb);
636                                         }
637                                 } else if (remote->sa_family == AF_INET6) {
638                                         struct sockaddr_in6 *sin6, *rsin6;
639                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
640                                         rsin6 = (struct sockaddr_in6 *)remote;
641                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
642                                                                  &rsin6->sin6_addr)) {
643                                                 /* found it */
644                                                 if (netp != NULL) {
645                                                         *netp = net;
646                                                 }
647                                                 if (locked_tcb == NULL) {
648                                                         SCTP_INP_DECR_REF(inp);
649                                                 }
650                                                 SCTP_INP_WUNLOCK(inp);
651                                                 SCTP_INP_INFO_RUNLOCK();
652                                                 return (stcb);
653                                         }
654                                 }
655                         }
656                         SCTP_TCB_UNLOCK(stcb);
657                 }
658         } else {
659                 SCTP_INP_WLOCK(inp);
660                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
661                                                                inp->sctp_hashmark)];
662                 if (head == NULL) {
663                         goto null_return;
664                 }
665                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
666                         if (stcb->rport != rport) {
667                                 /* remote port does not match */
668                                 continue;
669                         }
670                         /* now look at the list of remote addresses */
671                         SCTP_TCB_LOCK(stcb);
672                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
673                                 if (net->ro._l_addr.sa.sa_family !=
674                                     remote->sa_family) {
675                                         /* not the same family */
676                                         continue;
677                                 }
678                                 if (remote->sa_family == AF_INET) {
679                                         struct sockaddr_in *sin, *rsin;
680                                         sin = (struct sockaddr_in *)
681                                                 &net->ro._l_addr;
682                                         rsin = (struct sockaddr_in *)remote;
683                                         if (sin->sin_addr.s_addr ==
684                                             rsin->sin_addr.s_addr) {
685                                                 /* found it */
686                                                 if (netp != NULL) {
687                                                         *netp = net;
688                                                 }
689                                                 if (locked_tcb == NULL) {
690                                                         SCTP_INP_DECR_REF(inp);
691                                                 }
692                                                 SCTP_INP_WUNLOCK(inp);
693                                                 SCTP_INP_INFO_RUNLOCK();
694                                                 return (stcb);
695                                         }
696                                 } else if (remote->sa_family == AF_INET6) {
697                                         struct sockaddr_in6 *sin6, *rsin6;
698                                         sin6 = (struct sockaddr_in6 *)
699                                                 &net->ro._l_addr;
700                                         rsin6 = (struct sockaddr_in6 *)remote;
701                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
702                                                                  &rsin6->sin6_addr)) {
703                                                 /* found it */
704                                                 if (netp != NULL) {
705                                                         *netp = net;
706                                                 }
707                                                 if (locked_tcb == NULL) {
708                                                         SCTP_INP_DECR_REF(inp);
709                                                 }
710                                                 SCTP_INP_WUNLOCK(inp);
711                                                 SCTP_INP_INFO_RUNLOCK();
712                                                 return (stcb);
713                                         }
714                                 }
715                         }
716                         SCTP_TCB_UNLOCK(stcb);
717                 }
718         }
719  null_return:
720         /* clean up for returning null */
721         if (locked_tcb){
722                 if (locked_tcb->sctp_ep != inp) {
723                         SCTP_INP_RLOCK(locked_tcb->sctp_ep);
724                         SCTP_TCB_LOCK(locked_tcb);
725                         SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
726                 } else
727                         SCTP_TCB_LOCK(locked_tcb);
728         }
729         SCTP_INP_WUNLOCK(inp);
730         SCTP_INP_INFO_RUNLOCK();
731         /* not found */
732         return (NULL);
733 }
734
735 /*
736  * Find an association for a specific endpoint using the association id
737  * given out in the COMM_UP notification
738  */
739 struct sctp_tcb *
740 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, caddr_t asoc_id)
741 {
742         /*
743          * Use my the assoc_id to find a endpoint
744          */
745         struct sctpasochead *head;
746         struct sctp_tcb *stcb;
747         u_int32_t vtag;
748
749         if (asoc_id == 0 || inp == NULL) {
750                 return (NULL);
751         }
752         SCTP_INP_INFO_RLOCK();
753         vtag = (u_int32_t)(uintptr_t)asoc_id;
754         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
755             sctppcbinfo.hashasocmark)];
756         if (head == NULL) {
757                 /* invalid vtag */
758                 SCTP_INP_INFO_RUNLOCK();
759                 return (NULL);
760         }
761         LIST_FOREACH(stcb, head, sctp_asocs) {
762                 SCTP_INP_RLOCK(stcb->sctp_ep);
763                 SCTP_TCB_LOCK(stcb);
764                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
765                 if (stcb->asoc.my_vtag == vtag) {
766                         /* candidate */
767                         if (inp != stcb->sctp_ep) {
768                                 /* some other guy has the
769                                  * same vtag active (vtag collision).
770                                  */
771                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
772                                 SCTP_TCB_UNLOCK(stcb);
773                                 continue;
774                         }
775                         sctp_pegs[SCTP_VTAG_EXPR]++;
776                         SCTP_INP_INFO_RUNLOCK();
777                         return (stcb);
778                 }
779                 SCTP_TCB_UNLOCK(stcb);
780         }
781         SCTP_INP_INFO_RUNLOCK();
782         return (NULL);
783 }
784
785 static struct sctp_inpcb *
786 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
787                     uint16_t lport)
788 {
789         struct sctp_inpcb *inp;
790         struct sockaddr_in *sin;
791         struct sockaddr_in6 *sin6;
792         struct sctp_laddr *laddr;
793
794         /* Endpoing probe expects
795          * that the INP_INFO is locked.
796          */
797         if (nam->sa_family == AF_INET) {
798                 sin = (struct sockaddr_in *)nam;
799                 sin6 = NULL;
800         } else if (nam->sa_family == AF_INET6) {
801                 sin6 = (struct sockaddr_in6 *)nam;
802                 sin = NULL;
803         } else {
804                 /* unsupported family */
805                 return (NULL);
806         }
807         if (head == NULL)
808                 return (NULL);
809
810         LIST_FOREACH(inp, head, sctp_hash) {
811                 SCTP_INP_RLOCK(inp);
812
813                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
814                     (inp->sctp_lport == lport)) {
815                         /* got it */
816                         if ((nam->sa_family == AF_INET) &&
817                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
818 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
819                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
820 #else
821 #if defined(__OpenBSD__)
822                             (0) /* For open bsd we do dual bind only */
823 #else
824                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
825 #endif
826 #endif
827                                 ) {
828                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
829                                 SCTP_INP_RUNLOCK(inp);
830                                 continue;
831                         }
832                         /* A V6 address and the endpoint is NOT bound V6 */
833                         if (nam->sa_family == AF_INET6 &&
834                            (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
835                                 SCTP_INP_RUNLOCK(inp);
836                                 continue;
837                         }
838                         SCTP_INP_RUNLOCK(inp);
839                         return (inp);
840                 }
841                 SCTP_INP_RUNLOCK(inp);
842         }
843
844         if ((nam->sa_family == AF_INET) &&
845             (sin->sin_addr.s_addr == INADDR_ANY)) {
846                 /* Can't hunt for one that has no address specified */
847                 return (NULL);
848         } else if ((nam->sa_family == AF_INET6) &&
849                    (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
850                 /* Can't hunt for one that has no address specified */
851                 return (NULL);
852         }
853         /*
854          * ok, not bound to all so see if we can find a EP bound to this
855          * address.
856          */
857 #ifdef SCTP_DEBUG
858         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
859                 kprintf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
860         }
861 #endif
862         LIST_FOREACH(inp, head, sctp_hash) {
863                 SCTP_INP_RLOCK(inp);
864                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
865                         SCTP_INP_RUNLOCK(inp);
866                         continue;
867                 }
868                 /*
869                  * Ok this could be a likely candidate, look at all of
870                  * its addresses
871                  */
872                 if (inp->sctp_lport != lport) {
873                         SCTP_INP_RUNLOCK(inp);
874                         continue;
875                 }
876 #ifdef SCTP_DEBUG
877                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
878                         kprintf("Ok, found matching local port\n");
879                 }
880 #endif
881                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
882                         if (laddr->ifa == NULL) {
883 #ifdef SCTP_DEBUG
884                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
885                                         kprintf("An ounce of prevention is worth a pound of cure\n");
886                                 }
887 #endif
888                                 continue;
889                         }
890 #ifdef SCTP_DEBUG
891                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
892                                 kprintf("Ok laddr->ifa:%p is possible, ",
893                                     laddr->ifa);
894                         }
895 #endif
896                         if (laddr->ifa->ifa_addr == NULL) {
897 #ifdef SCTP_DEBUG
898                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
899                                         kprintf("Huh IFA as an ifa_addr=NULL, ");
900                                 }
901 #endif
902                                 continue;
903                         }
904 #ifdef SCTP_DEBUG
905                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
906                                 kprintf("Ok laddr->ifa:%p is possible, ",
907                                     laddr->ifa->ifa_addr);
908                                 sctp_print_address(laddr->ifa->ifa_addr);
909                                 kprintf("looking for ");
910                                 sctp_print_address(nam);
911                         }
912 #endif
913                         if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
914                                 /* possible, see if it matches */
915                                 struct sockaddr_in *intf_addr;
916                                 intf_addr = (struct sockaddr_in *)
917                                     laddr->ifa->ifa_addr;
918                                 if (nam->sa_family == AF_INET) {
919                                         if (sin->sin_addr.s_addr ==
920                                             intf_addr->sin_addr.s_addr) {
921 #ifdef SCTP_DEBUG
922                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
923                                                         kprintf("YES, return ep:%p\n", inp);
924                                                 }
925 #endif
926                                                 SCTP_INP_RUNLOCK(inp);
927                                                 return (inp);
928                                         }
929                                 } else if (nam->sa_family == AF_INET6) {
930                                         struct sockaddr_in6 *intf_addr6;
931                                         intf_addr6 = (struct sockaddr_in6 *)
932                                             laddr->ifa->ifa_addr;
933                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
934                                             &intf_addr6->sin6_addr)) {
935 #ifdef SCTP_DEBUG
936                                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
937                                                         kprintf("YES, return ep:%p\n", inp);
938                                                 }
939 #endif
940                                                 SCTP_INP_RUNLOCK(inp);
941                                                 return (inp);
942                                         }
943                                 }
944                         }
945                         SCTP_INP_RUNLOCK(inp);
946                 }
947         }
948 #ifdef SCTP_DEBUG
949         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
950                 kprintf("NO, Falls out to NULL\n");
951         }
952 #endif
953         return (NULL);
954 }
955
956
957 struct sctp_inpcb *
958 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
959 {
960         /*
961          * First we check the hash table to see if someone has this port
962          * bound with just the port.
963          */
964         struct sctp_inpcb *inp;
965         struct sctppcbhead *head;
966         struct sockaddr_in *sin;
967         struct sockaddr_in6 *sin6;
968         int lport;
969 #ifdef SCTP_DEBUG
970         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
971                 kprintf("Looking for endpoint %d :",
972                        ntohs(((struct sockaddr_in *)nam)->sin_port));
973                 sctp_print_address(nam);
974         }
975 #endif
976         if (nam->sa_family == AF_INET) {
977                 sin = (struct sockaddr_in *)nam;
978                 lport = ((struct sockaddr_in *)nam)->sin_port;
979         } else if (nam->sa_family == AF_INET6) {
980                 sin6 = (struct sockaddr_in6 *)nam;
981                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
982         } else {
983                 /* unsupported family */
984                 return (NULL);
985         }
986         /*
987          * I could cheat here and just cast to one of the types but we will
988          * do it right. It also provides the check against an Unsupported
989          * type too.
990          */
991         /* Find the head of the ALLADDR chain */
992         if (have_lock == 0)
993                 SCTP_INP_INFO_RLOCK();
994         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
995                                                              sctppcbinfo.hashmark)];
996 #ifdef SCTP_DEBUG
997         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
998                 kprintf("Main hash to lookup at head:%p\n", head);
999         }
1000 #endif
1001         inp = sctp_endpoint_probe(nam, head, lport);
1002
1003         /*
1004          * If the TCP model exists it could be that the main listening
1005          * endpoint is gone but there exists a connected socket for this
1006          * guy yet. If so we can return the first one that we find. This
1007          * may NOT be the correct one but the sctp_findassociation_ep_addr
1008          * has further code to look at all TCP models.
1009          */
1010         if (inp == NULL && find_tcp_pool) {
1011                 unsigned int i;
1012 #ifdef SCTP_DEBUG
1013                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1014                         kprintf("EP was NULL and TCP model is supported\n");
1015                 }
1016 #endif
1017                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1018                         /*
1019                          * This is real gross, but we do NOT have a remote
1020                          * port at this point depending on who is calling. We
1021                          * must therefore look for ANY one that matches our
1022                          * local port :/
1023                          */
1024                         head = &sctppcbinfo.sctp_tcpephash[i];
1025                         if (LIST_FIRST(head)) {
1026                                 inp = sctp_endpoint_probe(nam, head, lport);
1027                                 if (inp) {
1028                                         /* Found one */
1029                                         break;
1030                                 }
1031                         }
1032                 }
1033         }
1034 #ifdef SCTP_DEBUG
1035         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1036                 kprintf("EP to return is %p\n", inp);
1037         }
1038 #endif
1039         if (have_lock == 0) {
1040                 if (inp) {
1041                         SCTP_INP_WLOCK(inp);
1042                         SCTP_INP_INCR_REF(inp);
1043                         SCTP_INP_WUNLOCK(inp);
1044                 }
1045                 SCTP_INP_INFO_RUNLOCK();
1046         } else {
1047                 if (inp) {
1048                         SCTP_INP_WLOCK(inp);
1049                         SCTP_INP_INCR_REF(inp);
1050                         SCTP_INP_WUNLOCK(inp);
1051                 }
1052         }
1053         return (inp);
1054 }
1055
1056 /*
1057  * Find an association for an endpoint with the pointer to whom you want
1058  * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1059  * We may need to change the *to to some other struct like a mbuf...
1060  */
1061 struct sctp_tcb *
1062 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1063     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1064 {
1065         struct sctp_inpcb *inp;
1066         struct sctp_tcb *retval;
1067
1068         SCTP_INP_INFO_RLOCK();
1069         if (find_tcp_pool) {
1070                 if (inp_p != NULL) {
1071                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1072                 } else {
1073                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
1074                 }
1075                 if (retval != NULL) {
1076                         SCTP_INP_INFO_RUNLOCK();
1077                         return (retval);
1078                 }
1079         }
1080         inp = sctp_pcb_findep(to, 0, 1);
1081         if (inp_p != NULL) {
1082                 *inp_p = inp;
1083         }
1084         SCTP_INP_INFO_RUNLOCK();
1085
1086         if (inp == NULL) {
1087                 return (NULL);
1088         }
1089
1090         /*
1091          * ok, we have an endpoint, now lets find the assoc for it (if any)
1092          * we now place the source address or from in the to of the find
1093          * endpoint call. Since in reality this chain is used from the
1094          * inbound packet side.
1095          */
1096         if (inp_p != NULL) {
1097                 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1098         } else {
1099                 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1100         }
1101 }
1102
1103
1104 /*
1105  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1106  * find all addresses that the sender has specified in any address list.
1107  * Each address will be used to lookup the TCB and see if one exits.
1108  */
1109 static struct sctp_tcb *
1110 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1111     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1112     struct sockaddr *dest)
1113 {
1114         struct sockaddr_in sin4;
1115         struct sockaddr_in6 sin6;
1116         struct sctp_paramhdr *phdr, parm_buf;
1117         struct sctp_tcb *retval;
1118         u_int32_t ptype, plen;
1119
1120         memset(&sin4, 0, sizeof(sin4));
1121         memset(&sin6, 0, sizeof(sin6));
1122         sin4.sin_len = sizeof(sin4);
1123         sin4.sin_family = AF_INET;
1124         sin4.sin_port = sh->src_port;
1125         sin6.sin6_len = sizeof(sin6);
1126         sin6.sin6_family = AF_INET6;
1127         sin6.sin6_port = sh->src_port;
1128
1129         retval = NULL;
1130         offset += sizeof(struct sctp_init_chunk);
1131
1132         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1133         while (phdr != NULL) {
1134                 /* now we must see if we want the parameter */
1135                 ptype = ntohs(phdr->param_type);
1136                 plen = ntohs(phdr->param_length);
1137                 if (plen == 0) {
1138 #ifdef SCTP_DEBUG
1139                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1140                                 kprintf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1141                         }
1142 #endif /* SCTP_DEBUG */
1143                         break;
1144                 }
1145                 if (ptype == SCTP_IPV4_ADDRESS &&
1146                     plen == sizeof(struct sctp_ipv4addr_param)) {
1147                         /* Get the rest of the address */
1148                         struct sctp_ipv4addr_param ip4_parm, *p4;
1149
1150                         phdr = sctp_get_next_param(m, offset,
1151                             (struct sctp_paramhdr *)&ip4_parm, plen);
1152                         if (phdr == NULL) {
1153                                 return (NULL);
1154                         }
1155                         p4 = (struct sctp_ipv4addr_param *)phdr;
1156                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1157                         /* look it up */
1158                         retval = sctp_findassociation_ep_addr(inp_p,
1159                             (struct sockaddr *)&sin4, netp, dest, NULL);
1160                         if (retval != NULL) {
1161                                 return (retval);
1162                         }
1163                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1164                     plen == sizeof(struct sctp_ipv6addr_param)) {
1165                         /* Get the rest of the address */
1166                         struct sctp_ipv6addr_param ip6_parm, *p6;
1167
1168                         phdr = sctp_get_next_param(m, offset,
1169                             (struct sctp_paramhdr *)&ip6_parm, plen);
1170                         if (phdr == NULL) {
1171                                 return (NULL);
1172                         }
1173                         p6 = (struct sctp_ipv6addr_param *)phdr;
1174                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1175                         /* look it up */
1176                         retval = sctp_findassociation_ep_addr(inp_p,
1177                             (struct sockaddr *)&sin6, netp, dest, NULL);
1178                         if (retval != NULL) {
1179                                 return (retval);
1180                         }
1181                 }
1182                 offset += SCTP_SIZE32(plen);
1183                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1184                     sizeof(parm_buf));
1185         }
1186         return (NULL);
1187 }
1188
1189 static struct sctp_tcb *
1190 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1191     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1192     uint16_t lport)
1193 {
1194         /*
1195          * Use my vtag to hash. If we find it we then verify the source addr
1196          * is in the assoc. If all goes well we save a bit on rec of a packet.
1197          */
1198         struct sctpasochead *head;
1199         struct sctp_nets *net;
1200         struct sctp_tcb *stcb;
1201
1202         SCTP_INP_INFO_RLOCK();
1203         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1204             sctppcbinfo.hashasocmark)];
1205         if (head == NULL) {
1206                 /* invalid vtag */
1207                 SCTP_INP_INFO_RUNLOCK();
1208                 return (NULL);
1209         }
1210         LIST_FOREACH(stcb, head, sctp_asocs) {
1211                 SCTP_INP_RLOCK(stcb->sctp_ep);
1212                 SCTP_TCB_LOCK(stcb);
1213                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1214                 if (stcb->asoc.my_vtag == vtag) {
1215                         /* candidate */
1216                         if (stcb->rport != rport) {
1217                                 /*
1218                                  * we could remove this if vtags are unique
1219                                  * across the system.
1220                                  */
1221                                 SCTP_TCB_UNLOCK(stcb);
1222                                 continue;
1223                         }
1224                         if (stcb->sctp_ep->sctp_lport != lport) {
1225                                 /*
1226                                  * we could remove this if vtags are unique
1227                                  * across the system.
1228                                  */
1229                                 SCTP_TCB_UNLOCK(stcb);
1230                                 continue;
1231                         }
1232                         net = sctp_findnet(stcb, from);
1233                         if (net) {
1234                                 /* yep its him. */
1235                                 *netp = net;
1236                                 sctp_pegs[SCTP_VTAG_EXPR]++;
1237                                 *inp_p = stcb->sctp_ep;
1238                                 SCTP_INP_INFO_RUNLOCK();
1239                                 return (stcb);
1240                         } else {
1241                                 /* not him, this should only
1242                                  * happen in rare cases so
1243                                  * I peg it.
1244                                  */
1245                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
1246                         }
1247                 }
1248                 SCTP_TCB_UNLOCK(stcb);
1249         }
1250         SCTP_INP_INFO_RUNLOCK();
1251         return (NULL);
1252 }
1253
1254 /*
1255  * Find an association with the pointer to the inbound IP packet. This
1256  * can be a IPv4 or IPv6 packet.
1257  */
1258 struct sctp_tcb *
1259 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1260     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1261     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1262 {
1263         int find_tcp_pool;
1264         struct ip *iph;
1265         struct sctp_tcb *retval;
1266         struct sockaddr_storage to_store, from_store;
1267         struct sockaddr *to = (struct sockaddr *)&to_store;
1268         struct sockaddr *from = (struct sockaddr *)&from_store;
1269         struct sctp_inpcb *inp;
1270
1271
1272         iph = mtod(m, struct ip *);
1273         if (iph->ip_v == IPVERSION) {
1274                 /* its IPv4 */
1275                 struct sockaddr_in *to4, *from4;
1276
1277                 to4 = (struct sockaddr_in *)&to_store;
1278                 from4 = (struct sockaddr_in *)&from_store;
1279                 bzero(to4, sizeof(*to4));
1280                 bzero(from4, sizeof(*from4));
1281                 from4->sin_family = to4->sin_family = AF_INET;
1282                 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1283                 from4->sin_addr.s_addr  = iph->ip_src.s_addr;
1284                 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1285                 from4->sin_port = sh->src_port;
1286                 to4->sin_port = sh->dest_port;
1287         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1288                 /* its IPv6 */
1289                 struct ip6_hdr *ip6;
1290                 struct sockaddr_in6 *to6, *from6;
1291
1292                 ip6 = mtod(m, struct ip6_hdr *);
1293                 to6 = (struct sockaddr_in6 *)&to_store;
1294                 from6 = (struct sockaddr_in6 *)&from_store;
1295                 bzero(to6, sizeof(*to6));
1296                 bzero(from6, sizeof(*from6));
1297                 from6->sin6_family = to6->sin6_family = AF_INET6;
1298                 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1299                 to6->sin6_addr = ip6->ip6_dst;
1300                 from6->sin6_addr = ip6->ip6_src;
1301                 from6->sin6_port = sh->src_port;
1302                 to6->sin6_port = sh->dest_port;
1303                 /* Get the scopes in properly to the sin6 addr's */
1304                 in6_recoverscope(to6, &to6->sin6_addr, NULL);
1305 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1306                 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1307 #else
1308                 in6_embedscope(&to6->sin6_addr, to6);
1309 #endif
1310
1311                 in6_recoverscope(from6, &from6->sin6_addr, NULL);
1312 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1313                 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1314 #else
1315                 in6_embedscope(&from6->sin6_addr, from6);
1316 #endif
1317         } else {
1318                 /* Currently not supported. */
1319                 return (NULL);
1320         }
1321 #ifdef SCTP_DEBUG
1322         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1323                 kprintf("Looking for port %d address :",
1324                        ntohs(((struct sockaddr_in *)to)->sin_port));
1325                 sctp_print_address(to);
1326                 kprintf("From for port %d address :",
1327                        ntohs(((struct sockaddr_in *)from)->sin_port));
1328                 sctp_print_address(from);
1329         }
1330 #endif
1331
1332         if (sh->v_tag) {
1333                 /* we only go down this path if vtag is non-zero */
1334                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1335                     inp_p, netp, sh->src_port, sh->dest_port);
1336                 if (retval) {
1337                         return (retval);
1338                 }
1339         }
1340         find_tcp_pool = 0;
1341         if ((ch->chunk_type != SCTP_INITIATION) &&
1342             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1343             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1344             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1345                 /* Other chunk types go to the tcp pool. */
1346                 find_tcp_pool = 1;
1347         }
1348         if (inp_p) {
1349                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1350                     find_tcp_pool);
1351                 inp = *inp_p;
1352         } else {
1353                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1354                     find_tcp_pool);
1355         }
1356 #ifdef SCTP_DEBUG
1357         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1358                 kprintf("retval:%p inp:%p\n", retval, inp);
1359         }
1360 #endif
1361         if (retval == NULL && inp) {
1362                 /* Found a EP but not this address */
1363 #ifdef SCTP_DEBUG
1364                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1365                         kprintf("Found endpoint %p but no asoc - ep state:%x\n",
1366                             inp, inp->sctp_flags);
1367                 }
1368 #endif
1369                 if ((ch->chunk_type == SCTP_INITIATION) ||
1370                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1371                         /*
1372                          * special hook, we do NOT return linp or an
1373                          * association that is linked to an existing
1374                          * association that is under the TCP pool (i.e. no
1375                          * listener exists). The endpoint finding routine
1376                          * will always find a listner before examining the
1377                          * TCP pool.
1378                          */
1379                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1380 #ifdef SCTP_DEBUG
1381                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1382                                         kprintf("Gak, its in the TCP pool... return NULL");
1383                                 }
1384 #endif
1385                                 if (inp_p) {
1386                                         *inp_p = NULL;
1387                                 }
1388                                 return (NULL);
1389                         }
1390 #ifdef SCTP_DEBUG
1391                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1392                                 kprintf("Now doing SPECIAL find\n");
1393                         }
1394 #endif
1395                         retval = sctp_findassociation_special_addr(m, iphlen,
1396                             offset, sh, inp_p, netp, to);
1397                 }
1398         }
1399 #ifdef SCTP_DEBUG
1400         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1401             kprintf("retval is %p\n", retval);
1402         }
1403 #endif
1404         return (retval);
1405 }
1406
1407 extern int sctp_max_burst_default;
1408
1409 extern unsigned int sctp_delayed_sack_time_default;
1410 extern unsigned int sctp_heartbeat_interval_default;
1411 extern unsigned int sctp_pmtu_raise_time_default;
1412 extern unsigned int sctp_shutdown_guard_time_default;
1413 extern unsigned int sctp_secret_lifetime_default;
1414
1415 extern unsigned int sctp_rto_max_default;
1416 extern unsigned int sctp_rto_min_default;
1417 extern unsigned int sctp_rto_initial_default;
1418 extern unsigned int sctp_init_rto_max_default;
1419 extern unsigned int sctp_valid_cookie_life_default;
1420 extern unsigned int sctp_init_rtx_max_default;
1421 extern unsigned int sctp_assoc_rtx_max_default;
1422 extern unsigned int sctp_path_rtx_max_default;
1423 extern unsigned int sctp_nr_outgoing_streams_default;
1424
1425 /*
1426  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1427  * addresses. This way if we don't get a bind we by default pick a ephemeral
1428  * port with all addresses bound.
1429  */
1430 int
1431 sctp_inpcb_alloc(struct socket *so)
1432 {
1433         /*
1434          * we get called when a new endpoint starts up. We need to allocate
1435          * the sctp_inpcb structure from the zone and init it. Mark it as
1436          * unbound and find a port that we can use as an ephemeral with
1437          * INADDR_ANY. If the user binds later no problem we can then add
1438          * in the specific addresses. And setup the default parameters for
1439          * the EP.
1440          */
1441         int i, error;
1442         struct sctp_inpcb *inp, *n_inp;
1443         struct sctp_pcb *m;
1444         struct timeval time;
1445
1446         error = 0;
1447
1448         /* Hack alert:
1449          *
1450          * This code audits the entire INP list to see if
1451          * any ep's that are in the GONE state are now
1452          * all free. This should not happen really since when
1453          * the last association if freed we should end up deleting
1454          * the inpcb. This code including the locks should
1455          * be taken out ... since the last set of fixes I
1456          * have not seen the "Found a GONE on list" has not
1457          * came out. But i am paranoid and we will leave this
1458          * in at the cost of efficency on allocation of PCB's.
1459          * Probably we should move this to the invariant
1460          * compile options
1461          */
1462 /* #ifdef INVARIANTS*/
1463         SCTP_INP_INFO_RLOCK();
1464         inp = LIST_FIRST(&sctppcbinfo.listhead);
1465         while (inp) {
1466                 n_inp = LIST_NEXT(inp, sctp_list);
1467                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1468                         if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1469                                 /* finish the job now */
1470                                 kprintf("Found a GONE on list\n");
1471                                 SCTP_INP_INFO_RUNLOCK();
1472                                 sctp_inpcb_free(inp, 1);
1473                                 SCTP_INP_INFO_RLOCK();
1474                         }
1475                 }
1476                 inp = n_inp;
1477         }
1478         SCTP_INP_INFO_RUNLOCK();
1479 /* #endif INVARIANTS*/
1480
1481         SCTP_INP_INFO_WLOCK();
1482         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1483         if (inp == NULL) {
1484                 kprintf("Out of SCTP-INPCB structures - no resources\n");
1485                 SCTP_INP_INFO_WUNLOCK();
1486                 return (ENOBUFS);
1487         }
1488
1489         /* zap it */
1490         bzero(inp, sizeof(*inp));
1491
1492         /* bump generations */
1493         inp->ip_inp.inp.inp_socket = so;
1494
1495         /* setup socket pointers */
1496         inp->sctp_socket = so;
1497
1498         /* setup inpcb socket too */
1499         inp->ip_inp.inp.inp_socket = so;
1500         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1501 #ifdef IPSEC
1502 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1503         {
1504                 struct inpcbpolicy *pcb_sp = NULL;
1505                 error = ipsec_init_policy(so, &pcb_sp);
1506                 /* Arrange to share the policy */
1507                 inp->ip_inp.inp.inp_sp = pcb_sp;
1508                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1509         }
1510 #else
1511         /* not sure what to do for openbsd here */
1512         error = 0;
1513 #endif
1514         if (error != 0) {
1515                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1516                 SCTP_INP_INFO_WUNLOCK();
1517                 return error;
1518         }
1519 #endif /* IPSEC */
1520         sctppcbinfo.ipi_count_ep++;
1521 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1522         inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1523         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1524 #else
1525         inp->inp_ip_ttl = ip_defttl;
1526         inp->inp_ip_tos = 0;
1527 #endif
1528
1529         so->so_pcb = (caddr_t)inp;
1530
1531         if ((so->so_type == SOCK_DGRAM) ||
1532             (so->so_type == SOCK_SEQPACKET)) {
1533                 /* UDP style socket */
1534                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1535                     SCTP_PCB_FLAGS_UNBOUND);
1536                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1537         } else if (so->so_type == SOCK_STREAM) {
1538                 /* TCP style socket */
1539                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1540                     SCTP_PCB_FLAGS_UNBOUND);
1541                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1542         } else {
1543                 /*
1544                  * unsupported socket type (RAW, etc)- in case we missed
1545                  * it in protosw
1546                  */
1547                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1548                 SCTP_INP_INFO_WUNLOCK();
1549                 return (EOPNOTSUPP);
1550         }
1551         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1552 #ifdef __NetBSD__
1553             HASH_LIST,
1554 #endif
1555             M_PCB,
1556 #if defined(__NetBSD__) || defined(__OpenBSD__)
1557             M_WAITOK,
1558 #endif
1559             &inp->sctp_hashmark);
1560         if (inp->sctp_tcbhash == NULL) {
1561                 kprintf("Out of SCTP-INPCB->hashinit - no resources\n");
1562                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1563                 SCTP_INP_INFO_WUNLOCK();
1564                 return (ENOBUFS);
1565         }
1566         /* LOCK init's */
1567         SCTP_INP_LOCK_INIT(inp);
1568         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1569         /* lock the new ep */
1570         SCTP_INP_WLOCK(inp);
1571
1572         /* add it to the info area */
1573         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1574         SCTP_INP_INFO_WUNLOCK();
1575
1576         LIST_INIT(&inp->sctp_addr_list);
1577         LIST_INIT(&inp->sctp_asoc_list);
1578         TAILQ_INIT(&inp->sctp_queue_list);
1579         /* Init the timer structure for signature change */
1580 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1581         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1582 #else
1583         callout_init(&inp->sctp_ep.signature_change.timer);
1584 #endif
1585         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1586
1587         /* now init the actual endpoint default data */
1588         m = &inp->sctp_ep;
1589
1590         /* setup the base timeout information */
1591         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1592         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1593         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1594         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1595         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1596         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1597         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1598         /* all max/min max are in ms */
1599         m->sctp_maxrto = sctp_rto_max_default;
1600         m->sctp_minrto = sctp_rto_min_default;
1601         m->initial_rto = sctp_rto_initial_default;
1602         m->initial_init_rto_max = sctp_init_rto_max_default;
1603
1604         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1605
1606         m->max_init_times = sctp_init_rtx_max_default;
1607         m->max_send_times = sctp_assoc_rtx_max_default;
1608         m->def_net_failure = sctp_path_rtx_max_default;
1609         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1610         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1611         m->max_burst = sctp_max_burst_default;
1612         /* number of streams to pre-open on a association */
1613         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1614
1615         /* Add adaption cookie */
1616         m->adaption_layer_indicator = 0x504C5253;
1617
1618         /* seed random number generator */
1619         m->random_counter = 1;
1620         m->store_at = SCTP_SIGNATURE_SIZE;
1621 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1622         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1623 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1624         read_random(m->random_numbers, sizeof(m->random_numbers));
1625 #elif defined(__OpenBSD__)
1626         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1627 #elif defined(__NetBSD__) && NRND > 0
1628         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1629                          RND_EXTRACT_ANY);
1630 #else
1631         {
1632                 u_int32_t *ranm, *ranp;
1633                 ranp = (u_int32_t *)&m->random_numbers;
1634                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1635                 if ((u_long)ranp % 4) {
1636                         /* not a even boundary? */
1637                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1638                 }
1639                 while (ranp < ranm) {
1640                         *ranp = random();
1641                         ranp++;
1642                 }
1643         }
1644 #endif
1645         sctp_fill_random_store(m);
1646
1647         /* Minimum cookie size */
1648         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1649                 sizeof(struct sctp_state_cookie);
1650         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1651
1652         /* Setup the initial secret */
1653         SCTP_GETTIME_TIMEVAL(&time);
1654         m->time_of_secret_change = time.tv_sec;
1655
1656         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1657                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1658         }
1659         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1660
1661         /* How long is a cookie good for ? */
1662         m->def_cookie_life = sctp_valid_cookie_life_default;
1663         SCTP_INP_WUNLOCK(inp);
1664         return (error);
1665 }
1666
1667
1668 void
1669 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1670     struct sctp_tcb *stcb)
1671 {
1672         uint16_t lport, rport;
1673         struct sctppcbhead *head;
1674         struct sctp_laddr *laddr, *oladdr;
1675
1676         SCTP_TCB_UNLOCK(stcb);
1677         SCTP_INP_INFO_WLOCK();
1678         SCTP_INP_WLOCK(old_inp);
1679         SCTP_INP_WLOCK(new_inp);
1680         SCTP_TCB_LOCK(stcb);
1681
1682         new_inp->sctp_ep.time_of_secret_change =
1683             old_inp->sctp_ep.time_of_secret_change;
1684         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1685             sizeof(old_inp->sctp_ep.secret_key));
1686         new_inp->sctp_ep.current_secret_number =
1687             old_inp->sctp_ep.current_secret_number;
1688         new_inp->sctp_ep.last_secret_number =
1689             old_inp->sctp_ep.last_secret_number;
1690         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1691
1692         /* Copy the port across */
1693         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1694         rport = stcb->rport;
1695         /* Pull the tcb from the old association */
1696         LIST_REMOVE(stcb, sctp_tcbhash);
1697         LIST_REMOVE(stcb, sctp_tcblist);
1698
1699         /* Now insert the new_inp into the TCP connected hash */
1700         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1701             sctppcbinfo.hashtcpmark)];
1702
1703         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1704
1705         /* Now move the tcb into the endpoint list */
1706         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1707         /*
1708          * Question, do we even need to worry about the ep-hash since
1709          * we only have one connection? Probably not :> so lets
1710          * get rid of it and not suck up any kernel memory in that.
1711          */
1712         SCTP_INP_INFO_WUNLOCK();
1713         stcb->sctp_socket = new_inp->sctp_socket;
1714         stcb->sctp_ep = new_inp;
1715         if (new_inp->sctp_tcbhash != NULL) {
1716                 hashdestroy(new_inp->sctp_tcbhash, M_PCB,
1717                     new_inp->sctp_hashmark);
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         SCTP_ASOC_CREATE_LOCK(inp);
2241         SCTP_INP_WLOCK(inp);
2242
2243         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2244                 /* been here before */
2245                 kprintf("Endpoint was all gone (dup free)?\n");
2246                 SCTP_INP_WUNLOCK(inp);
2247                 SCTP_ASOC_CREATE_UNLOCK(inp);
2248                 return;
2249         }
2250         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2251
2252         if (inp->control) {
2253                 sctp_m_freem(inp->control);
2254                 inp->control = NULL;
2255         }
2256         if (inp->pkt) {
2257                 sctp_m_freem(inp->pkt);
2258                 inp->pkt = NULL;
2259         }
2260         so  = inp->sctp_socket;
2261         m = &inp->sctp_ep;
2262         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2263                                    * pointer here but I will
2264                                    * be nice :> (i.e. ip_pcb = ep;)
2265                                    */
2266
2267         if (immediate == 0) {
2268                 int cnt_in_sd;
2269                 cnt_in_sd = 0;
2270                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2271                      asoc = nasoc) {
2272                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2273                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2274                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2275                                 /* Just abandon things in the front states */
2276                                 SCTP_TCB_LOCK(asoc);
2277                                 SCTP_INP_WUNLOCK(inp);
2278                                 sctp_free_assoc(inp, asoc);
2279                                 SCTP_INP_WLOCK(inp);
2280                                 continue;
2281                         } else {
2282                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2283                         }
2284                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2285                             (asoc->asoc.size_on_reasm_queue > 0) ||
2286                             (asoc->asoc.size_on_all_streams > 0) ||
2287                             (so && (so->so_rcv.ssb_cc > 0))
2288                                 ) {
2289                                 /* Left with Data unread */
2290                                 struct mbuf *op_err;
2291                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2292                                 if (op_err) {
2293                                         /* Fill in the user initiated abort */
2294                                         struct sctp_paramhdr *ph;
2295                                         op_err->m_len =
2296                                             sizeof(struct sctp_paramhdr);
2297                                         ph = mtod(op_err,
2298                                             struct sctp_paramhdr *);
2299                                         ph->param_type = htons(
2300                                             SCTP_CAUSE_USER_INITIATED_ABT);
2301                                         ph->param_length = htons(op_err->m_len);
2302                                 }
2303                                 SCTP_TCB_LOCK(asoc);
2304                                 sctp_send_abort_tcb(asoc, op_err);
2305
2306                                 SCTP_INP_WUNLOCK(inp);
2307                                 sctp_free_assoc(inp, asoc);
2308                                 SCTP_INP_WLOCK(inp);
2309                                 continue;
2310                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2311                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2312                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2313                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2314                                         /* there is nothing queued to send, so I send shutdown */
2315                                         SCTP_TCB_LOCK(asoc);
2316                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2317                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2318                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2319                                                          asoc->asoc.primary_destination);
2320                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2321                                                          asoc->asoc.primary_destination);
2322                                         sctp_chunk_output(inp, asoc, 1);
2323                                         SCTP_TCB_UNLOCK(asoc);
2324                                 }
2325                         } else {
2326                                 /* mark into shutdown pending */
2327                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2328                         }
2329                         cnt_in_sd++;
2330                 }
2331                 /* now is there some left in our SHUTDOWN state? */
2332                 if (cnt_in_sd) {
2333                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2334                         SCTP_INP_WUNLOCK(inp);
2335                         SCTP_ASOC_CREATE_UNLOCK(inp);
2336                         return;
2337                 }
2338         }
2339 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2340         if (inp->refcount) {
2341                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2342                 SCTP_INP_WUNLOCK(inp);
2343                 SCTP_ASOC_CREATE_UNLOCK(inp);
2344                 return;
2345         }
2346 #endif
2347         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2348 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2349         rt = ip_pcb->inp_route.ro_rt;
2350 #endif
2351
2352         callout_stop(&inp->sctp_ep.signature_change.timer);
2353
2354         if (so) {
2355         /* First take care of socket level things */
2356 #ifdef IPSEC
2357 #ifdef __OpenBSD__
2358         /* XXX IPsec cleanup here */
2359                 if (ip_pcb->inp_tdb_in)
2360                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2361                                  ip_pcb, inp_tdb_in_next);
2362                 if (ip_pcb->inp_tdb_out)
2363                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2364                                  inp_tdb_out_next);
2365                 if (ip_pcb->inp_ipsec_localid)
2366                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2367                 if (ip_pcb->inp_ipsec_remoteid)
2368                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2369                 if (ip_pcb->inp_ipsec_localcred)
2370                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2371                 if (ip_pcb->inp_ipsec_remotecred)
2372                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2373                 if (ip_pcb->inp_ipsec_localauth)
2374                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2375                 if (ip_pcb->inp_ipsec_remoteauth)
2376                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2377 #else
2378                 ipsec4_delete_pcbpolicy(ip_pcb);
2379 #endif
2380 #endif /*IPSEC*/
2381 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2382                 ACCEPT_LOCK();
2383                 SOCK_LOCK(so);
2384 #endif
2385                 so->so_pcb = NULL;
2386                 sofree(so);
2387         }
2388
2389         if (ip_pcb->inp_options) {
2390                 m_free(ip_pcb->inp_options);
2391                 ip_pcb->inp_options = 0;
2392         }
2393 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2394         if (rt) {
2395                 RTFREE(rt);
2396                 ip_pcb->inp_route.ro_rt = 0;
2397         }
2398 #endif
2399         if (ip_pcb->inp_moptions) {
2400                 ip_freemoptions(ip_pcb->inp_moptions);
2401                 ip_pcb->inp_moptions = 0;
2402         }
2403 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2404         inp->inp_vflag = 0;
2405 #else
2406         ip_pcb->inp_vflag = 0;
2407 #endif
2408
2409         /* Now the sctp_pcb things */
2410
2411         /*
2412          * free each asoc if it is not already closed/free. we can't use
2413          * the macro here since le_next will get freed as part of the
2414          * sctp_free_assoc() call.
2415          */
2416         cnt = 0;
2417         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2418              asoc = nasoc) {
2419                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2420                 SCTP_TCB_LOCK(asoc);
2421                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2422                         struct mbuf *op_err;
2423                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2424                         if (op_err) {
2425                                 /* Fill in the user initiated abort */
2426                                 struct sctp_paramhdr *ph;
2427                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2428                                 ph = mtod(op_err, struct sctp_paramhdr *);
2429                                 ph->param_type = htons(
2430                                     SCTP_CAUSE_USER_INITIATED_ABT);
2431                                 ph->param_length = htons(op_err->m_len);
2432                         }
2433                         sctp_send_abort_tcb(asoc, op_err);
2434                 }
2435                 cnt++;
2436                 /*
2437                  * sctp_free_assoc() will call sctp_inpcb_free(),
2438                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2439                  * So, we clear it before sctp_free_assoc() making sure
2440                  * no double sctp_inpcb_free().
2441                  */
2442                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2443                 SCTP_INP_WUNLOCK(inp);
2444                 sctp_free_assoc(inp, asoc);
2445                 SCTP_INP_WLOCK(inp);
2446         }
2447         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2448                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2449                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2450                 sctppcbinfo.ipi_count_sockq--;
2451                 sctppcbinfo.ipi_gencnt_sockq++;
2452         }
2453         inp->sctp_socket = 0;
2454         /* Now first we remove ourselves from the overall list of all EP's */
2455
2456         /* Unlock inp first, need correct order */
2457         SCTP_INP_WUNLOCK(inp);
2458         /* now iterator lock */
2459         SCTP_ITERATOR_LOCK();
2460         /* now info lock */
2461         SCTP_INP_INFO_WLOCK();
2462         /* now reget the inp lock */
2463         SCTP_INP_WLOCK(inp);
2464
2465         inp_save = LIST_NEXT(inp, sctp_list);
2466         LIST_REMOVE(inp, sctp_list);
2467         /*
2468          * Now the question comes as to if this EP was ever bound at all.
2469          * If it was, then we must pull it out of the EP hash list.
2470          */
2471         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2472             SCTP_PCB_FLAGS_UNBOUND) {
2473                 /*
2474                  * ok, this guy has been bound. It's port is somewhere
2475                  * in the sctppcbinfo hash table. Remove it!
2476                  */
2477                 LIST_REMOVE(inp, sctp_hash);
2478         }
2479         /* fix any iterators only after out of the list */
2480         sctp_iterator_inp_being_freed(inp, inp_save);
2481         SCTP_ITERATOR_UNLOCK();
2482         /*
2483          * if we have an address list the following will free the list of
2484          * ifaddr's that are set into this ep. Again macro limitations here,
2485          * since the LIST_FOREACH could be a bad idea.
2486          */
2487         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2488              laddr = nladdr) {
2489                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2490                 LIST_REMOVE(laddr, sctp_nxt_addr);
2491                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2492                 sctppcbinfo.ipi_gencnt_laddr++;
2493                 sctppcbinfo.ipi_count_laddr--;
2494         }
2495         /* Now lets see about freeing the EP hash table. */
2496         if (inp->sctp_tcbhash != NULL) {
2497                 hashdestroy(inp->sctp_tcbhash, M_PCB, inp->sctp_hashmark);
2498                 inp->sctp_tcbhash = 0;
2499         }
2500         SCTP_INP_WUNLOCK(inp);
2501         SCTP_ASOC_CREATE_UNLOCK(inp);
2502         SCTP_INP_LOCK_DESTROY(inp);
2503         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2504
2505         /* Now we must put the ep memory back into the zone pool */
2506         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2507         sctppcbinfo.ipi_count_ep--;
2508
2509         SCTP_INP_INFO_WUNLOCK();
2510 }
2511
2512
2513 struct sctp_nets *
2514 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2515 {
2516         struct sctp_nets *net;
2517         struct sockaddr_in *sin;
2518         struct sockaddr_in6 *sin6;
2519         /* use the peer's/remote port for lookup if unspecified */
2520         sin = (struct sockaddr_in *)addr;
2521         sin6 = (struct sockaddr_in6 *)addr;
2522 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2523         if (stcb->rport != sin->sin_port) {
2524                 /* we cheat and just a sin for this test */
2525                 return (NULL);
2526         }
2527 #endif
2528         /* locate the address */
2529         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2530                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2531                         return (net);
2532         }
2533         return (NULL);
2534 }
2535
2536
2537 /*
2538  * add's a remote endpoint address, done with the INIT/INIT-ACK
2539  * as well as when a ASCONF arrives that adds it. It will also
2540  * initialize all the cwnd stats of stuff.
2541  */
2542 int
2543 sctp_is_address_on_local_host(struct sockaddr *addr)
2544 {
2545         struct ifnet *ifn;
2546
2547         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2548                 struct ifaddr_container *ifac;
2549
2550                 TAILQ_FOREACH(ifac, &ifn->if_addrheads[mycpuid], ifa_link) {
2551                         struct ifaddr *ifa = ifac->ifa;
2552
2553                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2554                                 /* same family */
2555                                 if (addr->sa_family == AF_INET) {
2556                                         struct sockaddr_in *sin, *sin_c;
2557                                         sin = (struct sockaddr_in *)addr;
2558                                         sin_c = (struct sockaddr_in *)
2559                                             ifa->ifa_addr;
2560                                         if (sin->sin_addr.s_addr ==
2561                                             sin_c->sin_addr.s_addr) {
2562                                                 /* we are on the same machine */
2563                                                 return (1);
2564                                         }
2565                                 } else if (addr->sa_family == AF_INET6) {
2566                                         struct sockaddr_in6 *sin6, *sin_c6;
2567                                         sin6 = (struct sockaddr_in6 *)addr;
2568                                         sin_c6 = (struct sockaddr_in6 *)
2569                                             ifa->ifa_addr;
2570                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2571                                             &sin_c6->sin6_addr)) {
2572                                                 /* we are on the same machine */
2573                                                 return (1);
2574                                         }
2575                                 }
2576                         }
2577                 }
2578         }
2579         return (0);
2580 }
2581
2582 int
2583 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2584     int set_scope, int from)
2585 {
2586         /*
2587          * The following is redundant to the same lines in the
2588          * sctp_aloc_assoc() but is needed since other's call the add
2589          * address function
2590          */
2591         struct sctp_nets *net, *netfirst;
2592         int addr_inscope;
2593
2594 #ifdef SCTP_DEBUG
2595         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2596                 kprintf("Adding an address (from:%d) to the peer: ", from);
2597                 sctp_print_address(newaddr);
2598         }
2599 #endif
2600         netfirst = sctp_findnet(stcb, newaddr);
2601         if (netfirst) {
2602                 /*
2603                  * Lie and return ok, we don't want to make the association
2604                  * go away for this behavior. It will happen in the TCP model
2605                  * in a connected socket. It does not reach the hash table
2606                  * until after the association is built so it can't be found.
2607                  * Mark as reachable, since the initial creation will have
2608                  * been cleared and the NOT_IN_ASSOC flag will have been
2609                  * added... and we don't want to end up removing it back out.
2610                  */
2611                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2612                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2613                             SCTP_ADDR_UNCONFIRMED);
2614                 } else {
2615                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2616                 }
2617
2618                 return (0);
2619         }
2620         addr_inscope = 1;
2621         if (newaddr->sa_family == AF_INET) {
2622                 struct sockaddr_in *sin;
2623                 sin = (struct sockaddr_in *)newaddr;
2624                 if (sin->sin_addr.s_addr == 0) {
2625                         /* Invalid address */
2626                         return (-1);
2627                 }
2628                 /* zero out the bzero area */
2629                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2630
2631                 /* assure len is set */
2632                 sin->sin_len = sizeof(struct sockaddr_in);
2633                 if (set_scope) {
2634 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2635                         stcb->ipv4_local_scope = 1;
2636 #else
2637                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2638                                 stcb->asoc.ipv4_local_scope = 1;
2639                         }
2640 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2641
2642                         if (sctp_is_address_on_local_host(newaddr)) {
2643                                 stcb->asoc.loopback_scope = 1;
2644                                 stcb->asoc.ipv4_local_scope = 1;
2645                                 stcb->asoc.local_scope = 1;
2646                                 stcb->asoc.site_scope = 1;
2647                         }
2648                 } else {
2649                         if (from == 8) {
2650                                 /* From connectx */
2651                                 if (sctp_is_address_on_local_host(newaddr)) {
2652                                         stcb->asoc.loopback_scope = 1;
2653                                         stcb->asoc.ipv4_local_scope = 1;
2654                                         stcb->asoc.local_scope = 1;
2655                                         stcb->asoc.site_scope = 1;
2656                                 }
2657                         }
2658                         /* Validate the address is in scope */
2659                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2660                             (stcb->asoc.ipv4_local_scope == 0)) {
2661                                 addr_inscope = 0;
2662                         }
2663                 }
2664         } else if (newaddr->sa_family == AF_INET6) {
2665                 struct sockaddr_in6 *sin6;
2666                 sin6 = (struct sockaddr_in6 *)newaddr;
2667                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2668                         /* Invalid address */
2669                         return (-1);
2670                 }
2671                 /* assure len is set */
2672                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2673                 if (set_scope) {
2674                         if (sctp_is_address_on_local_host(newaddr)) {
2675                                 stcb->asoc.loopback_scope = 1;
2676                                 stcb->asoc.local_scope = 1;
2677                                 stcb->asoc.ipv4_local_scope = 1;
2678                                 stcb->asoc.site_scope = 1;
2679                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2680                                 /*
2681                                  * If the new destination is a LINK_LOCAL
2682                                  * we must have common site scope. Don't set
2683                                  * the local scope since we may not share all
2684                                  * links, only loopback can do this.
2685                                  * Links on the local network would also
2686                                  * be on our private network for v4 too.
2687                                  */
2688                                 stcb->asoc.ipv4_local_scope = 1;
2689                                 stcb->asoc.site_scope = 1;
2690                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2691                                 /*
2692                                  * If the new destination is SITE_LOCAL
2693                                  * then we must have site scope in common.
2694                                  */
2695                                 stcb->asoc.site_scope = 1;
2696                         }
2697                 } else {
2698                         if (from == 8) {
2699                                 /* From connectx */
2700                                 if (sctp_is_address_on_local_host(newaddr)) {
2701                                         stcb->asoc.loopback_scope = 1;
2702                                         stcb->asoc.ipv4_local_scope = 1;
2703                                         stcb->asoc.local_scope = 1;
2704                                         stcb->asoc.site_scope = 1;
2705                                 }
2706                         }
2707                         /* Validate the address is in scope */
2708                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2709                             (stcb->asoc.loopback_scope == 0)) {
2710                                 addr_inscope = 0;
2711                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2712                                    (stcb->asoc.local_scope == 0)) {
2713                                 addr_inscope = 0;
2714                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2715                                    (stcb->asoc.site_scope == 0)) {
2716                                 addr_inscope = 0;
2717                         }
2718                 }
2719         } else {
2720                 /* not supported family type */
2721                 return (-1);
2722         }
2723         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2724         if (net == NULL) {
2725                 return (-1);
2726         }
2727         sctppcbinfo.ipi_count_raddr++;
2728         sctppcbinfo.ipi_gencnt_raddr++;
2729         bzero(net, sizeof(*net));
2730         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2731         if (newaddr->sa_family == AF_INET) {
2732                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2733         } else if (newaddr->sa_family == AF_INET6) {
2734                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2735         }
2736         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2737         net->failure_threshold = stcb->asoc.def_net_failure;
2738         if (addr_inscope == 0) {
2739 #ifdef SCTP_DEBUG
2740                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2741                         kprintf("Adding an address which is OUT OF SCOPE\n");
2742                 }
2743 #endif /* SCTP_DEBUG */
2744                 net->dest_state = (SCTP_ADDR_REACHABLE |
2745                     SCTP_ADDR_OUT_OF_SCOPE);
2746         } else {
2747                 if (from == 8)
2748                         /* 8 is passed by connect_x */
2749                         net->dest_state = SCTP_ADDR_REACHABLE;
2750                 else
2751                         net->dest_state = SCTP_ADDR_REACHABLE |
2752                             SCTP_ADDR_UNCONFIRMED;
2753         }
2754         net->RTO = stcb->asoc.initial_rto;
2755         stcb->asoc.numnets++;
2756         net->ref_count = 1;
2757
2758         /* Init the timer structure */
2759 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2760         callout_init(&net->rxt_timer.timer, 0);
2761         callout_init(&net->pmtu_timer.timer, 0);
2762 #else
2763         callout_init(&net->rxt_timer.timer);
2764         callout_init(&net->pmtu_timer.timer);
2765 #endif
2766
2767         /* Now generate a route for this guy */
2768         /* KAME hack: embed scopeid */
2769         if (newaddr->sa_family == AF_INET6) {
2770                 struct sockaddr_in6 *sin6;
2771                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2772 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2773                 in6_embedscope(&sin6->sin6_addr, sin6,
2774                     &stcb->sctp_ep->ip_inp.inp, NULL);
2775 #else
2776                 in6_embedscope(&sin6->sin6_addr, sin6);
2777 #endif
2778 #ifndef SCOPEDROUTING
2779                 sin6->sin6_scope_id = 0;
2780 #endif
2781         }
2782 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2783         rtalloc_ign((struct route *)&net->ro, 0UL);
2784 #else
2785         rtalloc((struct route *)&net->ro);
2786 #endif
2787         if (newaddr->sa_family == AF_INET6) {
2788                 struct sockaddr_in6 *sin6;
2789                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2790                 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2791         }
2792         if ((net->ro.ro_rt) &&
2793             (net->ro.ro_rt->rt_ifp)) {
2794                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2795                 if (from == 1) {
2796                         stcb->asoc.smallest_mtu = net->mtu;
2797                 }
2798                 /* start things off to match mtu of interface please. */
2799                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2800         } else {
2801                 net->mtu = stcb->asoc.smallest_mtu;
2802         }
2803         if (stcb->asoc.smallest_mtu > net->mtu) {
2804                 stcb->asoc.smallest_mtu = net->mtu;
2805         }
2806         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2807          * We then limit this to 4 MTU's of sending.
2808          */
2809         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2810
2811         /* we always get at LEAST 2 MTU's */
2812         if (net->cwnd < (2 * net->mtu)) {
2813                 net->cwnd = 2 * net->mtu;
2814         }
2815
2816         net->ssthresh = stcb->asoc.peers_rwnd;
2817
2818         net->src_addr_selected = 0;
2819         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2820         if (net->ro.ro_rt == NULL) {
2821                 /* Since we have no route put it at the back */
2822                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2823         } else if (netfirst == NULL) {
2824                 /* We are the first one in the pool. */
2825                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2826         } else if (netfirst->ro.ro_rt == NULL) {
2827                 /*
2828                  * First one has NO route. Place this one ahead of the
2829                  * first one.
2830                  */
2831                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2832         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2833                 /*
2834                  * This one has a different interface than the one at the
2835                  * top of the list. Place it ahead.
2836                  */
2837                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2838         } else {
2839                 /*
2840                  * Ok we have the same interface as the first one. Move
2841                  * forward until we find either
2842                  *   a) one with a NULL route... insert ahead of that
2843                  *   b) one with a different ifp.. insert after that.
2844                  *   c) end of the list.. insert at the tail.
2845                  */
2846                 struct sctp_nets *netlook;
2847                 do {
2848                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2849                         if (netlook == NULL) {
2850                                 /* End of the list */
2851                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2852                                     sctp_next);
2853                                 break;
2854                         } else if (netlook->ro.ro_rt == NULL) {
2855                                 /* next one has NO route */
2856                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2857                                 break;
2858                         } else if (netlook->ro.ro_rt->rt_ifp !=
2859                                    net->ro.ro_rt->rt_ifp) {
2860                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2861                                     net, sctp_next);
2862                                 break;
2863                         }
2864                         /* Shift forward */
2865                         netfirst = netlook;
2866                 } while (netlook != NULL);
2867         }
2868         /* got to have a primary set */
2869         if (stcb->asoc.primary_destination == 0) {
2870                 stcb->asoc.primary_destination = net;
2871         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2872                    (net->ro.ro_rt)) {
2873                 /* No route to current primary adopt new primary */
2874                 stcb->asoc.primary_destination = net;
2875         }
2876         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2877             net);
2878
2879         return (0);
2880 }
2881
2882
2883 /*
2884  * allocate an association and add it to the endpoint. The caller must
2885  * be careful to add all additional addresses once they are know right
2886  * away or else the assoc will be may experience a blackout scenario.
2887  */
2888 struct sctp_tcb *
2889 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2890     int for_a_init, int *error,  uint32_t override_tag)
2891 {
2892         struct sctp_tcb *stcb;
2893         struct sctp_association *asoc;
2894         struct sctpasochead *head;
2895         uint16_t rport;
2896         int err;
2897
2898         /*
2899          * Assumption made here:
2900          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2901          *  to make sure the address does not exist already.
2902          */
2903         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2904                 /* Hit max assoc, sorry no more */
2905                 *error = ENOBUFS;
2906                 return (NULL);
2907         }
2908         SCTP_INP_RLOCK(inp);
2909         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2910                 /*
2911                  * If its in the TCP pool, its NOT allowed to create an
2912                  * association. The parent listener needs to call
2913                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2914                  * peeled off, or connected one does this.. its an error.
2915                  */
2916                 SCTP_INP_RUNLOCK(inp);
2917                 *error = EINVAL;
2918                 return (NULL);
2919         }
2920
2921 #ifdef SCTP_DEBUG
2922         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2923                 kprintf("Allocate an association for peer:");
2924                 if (firstaddr)
2925                         sctp_print_address(firstaddr);
2926                 else
2927                         kprintf("None\n");
2928                 kprintf("Port:%d\n",
2929                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2930         }
2931 #endif /* SCTP_DEBUG */
2932         if (firstaddr->sa_family == AF_INET) {
2933                 struct sockaddr_in *sin;
2934                 sin = (struct sockaddr_in *)firstaddr;
2935                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2936                         /* Invalid address */
2937 #ifdef SCTP_DEBUG
2938                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2939                                 kprintf("peer address invalid\n");
2940                         }
2941 #endif
2942                         SCTP_INP_RUNLOCK(inp);
2943                         *error = EINVAL;
2944                         return (NULL);
2945                 }
2946                 rport = sin->sin_port;
2947         } else if (firstaddr->sa_family == AF_INET6) {
2948                 struct sockaddr_in6 *sin6;
2949                 sin6 = (struct sockaddr_in6 *)firstaddr;
2950                 if ((sin6->sin6_port == 0) ||
2951                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2952                         /* Invalid address */
2953 #ifdef SCTP_DEBUG
2954                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2955                                 kprintf("peer address invalid\n");
2956                         }
2957 #endif
2958                         SCTP_INP_RUNLOCK(inp);
2959                         *error = EINVAL;
2960                         return (NULL);
2961                 }
2962                 rport = sin6->sin6_port;
2963         } else {
2964                 /* not supported family type */
2965 #ifdef SCTP_DEBUG
2966                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2967                         kprintf("BAD family %d\n", firstaddr->sa_family);
2968                 }
2969 #endif
2970                 SCTP_INP_RUNLOCK(inp);
2971                 *error = EINVAL;
2972                 return (NULL);
2973         }
2974         SCTP_INP_RUNLOCK(inp);
2975         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2976                 /*
2977                  * If you have not performed a bind, then we need to do
2978                  * the ephemerial bind for you.
2979                  */
2980 #ifdef SCTP_DEBUG
2981                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2982                         kprintf("Doing implicit BIND\n");
2983                 }
2984 #endif
2985
2986                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2987                     NULL,
2988 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2989                                            NULL
2990 #else
2991                                            NULL
2992 #endif
2993                              ))){
2994                         /* bind error, probably perm */
2995 #ifdef SCTP_DEBUG
2996                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2997                                 kprintf("BIND FAILS ret:%d\n", err);
2998                         }
2999 #endif
3000
3001                         *error = err;
3002                         return (NULL);
3003                 }
3004         }
3005         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3006         if (stcb == NULL) {
3007                 /* out of memory? */
3008 #ifdef SCTP_DEBUG
3009                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3010                         kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3011                 }
3012 #endif
3013                 *error = ENOMEM;
3014                 return (NULL);
3015         }
3016         sctppcbinfo.ipi_count_asoc++;
3017         sctppcbinfo.ipi_gencnt_asoc++;
3018
3019         bzero(stcb, sizeof(*stcb));
3020         asoc = &stcb->asoc;
3021         SCTP_TCB_LOCK_INIT(stcb);
3022         /* setup back pointer's */
3023         stcb->sctp_ep = inp;
3024         stcb->sctp_socket = inp->sctp_socket;
3025         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3026                 /* failed */
3027                 SCTP_TCB_LOCK_DESTROY (stcb);
3028                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3029                 sctppcbinfo.ipi_count_asoc--;
3030 #ifdef SCTP_DEBUG
3031                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3032                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3033                 }
3034 #endif
3035                 *error = err;
3036                 return (NULL);
3037         }
3038         /* and the port */
3039         stcb->rport = rport;
3040         SCTP_INP_INFO_WLOCK();
3041         SCTP_INP_WLOCK(inp);
3042         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3043                 /* inpcb freed while alloc going on */
3044                 SCTP_TCB_LOCK_DESTROY (stcb);
3045                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3046                 SCTP_INP_WUNLOCK(inp);
3047                 SCTP_INP_INFO_WUNLOCK();
3048                 sctppcbinfo.ipi_count_asoc--;
3049 #ifdef SCTP_DEBUG
3050                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3051                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3052                 }
3053 #endif
3054                 *error = EINVAL;
3055                 return (NULL);
3056         }
3057         SCTP_TCB_LOCK(stcb);
3058
3059         /* now that my_vtag is set, add it to the  hash */
3060         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3061              sctppcbinfo.hashasocmark)];
3062         /* put it in the bucket in the vtag hash of assoc's for the system */
3063         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3064         SCTP_INP_INFO_WUNLOCK();
3065
3066
3067         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3068                 /* failure.. memory error? */
3069                 if (asoc->strmout)
3070                         kfree(asoc->strmout, M_PCB);
3071                 if (asoc->mapping_array)
3072                         kfree(asoc->mapping_array, M_PCB);
3073
3074                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3075                 sctppcbinfo.ipi_count_asoc--;
3076 #ifdef SCTP_DEBUG
3077                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3078                         kprintf("aloc_assoc: couldn't add remote addr!\n");
3079                 }
3080 #endif
3081                 SCTP_TCB_LOCK_DESTROY (stcb);
3082                 *error = ENOBUFS;
3083                 return (NULL);
3084         }
3085         /* Init all the timers */
3086 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3087         callout_init(&asoc->hb_timer.timer, 0);
3088         callout_init(&asoc->dack_timer.timer, 0);
3089         callout_init(&asoc->asconf_timer.timer, 0);
3090         callout_init(&asoc->shut_guard_timer.timer, 0);
3091         callout_init(&asoc->autoclose_timer.timer, 0);
3092         callout_init(&asoc->delayed_event_timer.timer, 0);
3093 #else
3094         callout_init(&asoc->hb_timer.timer);
3095         callout_init(&asoc->dack_timer.timer);
3096         callout_init(&asoc->asconf_timer.timer);
3097         callout_init(&asoc->shut_guard_timer.timer);
3098         callout_init(&asoc->autoclose_timer.timer);
3099         callout_init(&asoc->delayed_event_timer.timer);
3100 #endif
3101         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3102         /* now file the port under the hash as well */
3103         if (inp->sctp_tcbhash != NULL) {
3104                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3105                    inp->sctp_hashmark)];
3106                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3107         }
3108         SCTP_INP_WUNLOCK(inp);
3109 #ifdef SCTP_DEBUG
3110         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3111                 kprintf("Association %p now allocated\n", stcb);
3112         }
3113 #endif
3114         return (stcb);
3115 }
3116
3117 void
3118 sctp_free_remote_addr(struct sctp_nets *net)
3119 {
3120         if (net == NULL)
3121                 return;
3122         net->ref_count--;
3123         if (net->ref_count <= 0) {
3124                 /* stop timer if running */
3125                 callout_stop(&net->rxt_timer.timer);
3126                 callout_stop(&net->pmtu_timer.timer);
3127                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3128                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3129                 sctppcbinfo.ipi_count_raddr--;
3130         }
3131 }
3132
3133 /*
3134  * remove a remote endpoint address from an association, it
3135  * will fail if the address does not exist.
3136  */
3137 int
3138 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3139 {
3140         /*
3141          * Here we need to remove a remote address. This is quite simple, we
3142          * first find it in the list of address for the association
3143          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3144          * that item.
3145          * Note we do not allow it to be removed if there are no other
3146          * addresses.
3147          */
3148         struct sctp_association *asoc;
3149         struct sctp_nets *net, *net_tmp;
3150         asoc = &stcb->asoc;
3151         if (asoc->numnets < 2) {
3152                 /* Must have at LEAST two remote addresses */
3153                 return (-1);
3154         }
3155         /* locate the address */
3156         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3157                 net_tmp = TAILQ_NEXT(net, sctp_next);
3158                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3159                         continue;
3160                 }
3161                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3162                     remaddr)) {
3163                         /* we found the guy */
3164                         asoc->numnets--;
3165                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3166                         sctp_free_remote_addr(net);
3167                         if (net == asoc->primary_destination) {
3168                                 /* Reset primary */
3169                                 struct sctp_nets *lnet;
3170                                 lnet = TAILQ_FIRST(&asoc->nets);
3171                                 /* Try to find a confirmed primary */
3172                                 asoc->primary_destination =
3173                                     sctp_find_alternate_net(stcb, lnet);
3174                         }
3175                         if (net == asoc->last_data_chunk_from) {
3176                                 /* Reset primary */
3177                                 asoc->last_data_chunk_from =
3178                                     TAILQ_FIRST(&asoc->nets);
3179                         }
3180                         if (net == asoc->last_control_chunk_from) {
3181                                 /* Reset primary */
3182                                 asoc->last_control_chunk_from =
3183                                     TAILQ_FIRST(&asoc->nets);
3184                         }
3185                         if (net == asoc->asconf_last_sent_to) {
3186                                 /* Reset primary */
3187                                 asoc->asconf_last_sent_to =
3188                                     TAILQ_FIRST(&asoc->nets);
3189                         }
3190                         return (0);
3191                 }
3192         }
3193         /* not found. */
3194         return (-2);
3195 }
3196
3197
3198 static void
3199 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3200 {
3201         struct sctpvtaghead *chain;
3202         struct sctp_tagblock *twait_block;
3203         struct timeval now;
3204         int set, i;
3205         SCTP_GETTIME_TIMEVAL(&now);
3206         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3207         set = 0;
3208         if (!LIST_EMPTY(chain)) {
3209                 /* Block(s) present, lets find space, and expire on the fly */
3210                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3211                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3212                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3213                                     !set) {
3214                                         twait_block->vtag_block[0].tv_sec_at_expire =
3215                                             now.tv_sec + SCTP_TIME_WAIT;
3216                                         twait_block->vtag_block[0].v_tag = tag;
3217                                         set = 1;
3218                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3219                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3220                                     now.tv_sec)) {
3221                                         /* Audit expires this guy */
3222                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3223                                         twait_block->vtag_block[i].v_tag = 0;
3224                                         if (set == 0) {
3225                                                 /* Reuse it for my new tag */
3226                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3227                                                 twait_block->vtag_block[0].v_tag = tag;
3228                                                 set = 1;
3229                                         }
3230                                 }
3231                         }
3232                         if (set) {
3233                                 /*
3234                                  * We only do up to the block where we can
3235                                  * place our tag for audits
3236                                  */
3237                                 break;
3238                         }
3239                 }
3240         }
3241         /* Need to add a new block to chain */
3242         if (!set) {
3243                 twait_block = kmalloc(sizeof(struct sctp_tagblock), M_PCB,
3244                                       M_NOWAIT);
3245                 if (twait_block == NULL) {
3246                         return;
3247                 }
3248                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3249                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3250                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3251                     SCTP_TIME_WAIT;
3252                 twait_block->vtag_block[0].v_tag = tag;
3253         }
3254 }
3255
3256
3257 static void
3258 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3259 {
3260         struct sctp_iterator *it;
3261
3262
3263
3264         /* Unlock the tcb lock we do this so
3265          * we avoid a dead lock scenario where
3266          * the iterator is waiting on the TCB lock
3267          * and the TCB lock is waiting on the iterator
3268          * lock.
3269          */
3270         SCTP_ITERATOR_LOCK();
3271         SCTP_INP_INFO_WLOCK();
3272         SCTP_INP_WLOCK(inp);
3273         SCTP_TCB_LOCK(stcb);
3274
3275         it = stcb->asoc.stcb_starting_point_for_iterator;
3276         if (it == NULL) {
3277                 return;
3278         }
3279         if (it->inp != stcb->sctp_ep) {
3280                 /* hm, focused on the wrong one? */
3281                 return;
3282         }
3283         if (it->stcb != stcb) {
3284                 return;
3285         }
3286         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3287         if (it->stcb == NULL) {
3288                 /* done with all asoc's in this assoc */
3289                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3290                         it->inp = NULL;
3291                 } else {
3292
3293                         it->inp = LIST_NEXT(inp, sctp_list);
3294                 }
3295         }
3296 }
3297
3298 /*
3299  * Free the association after un-hashing the remote port.
3300  */
3301 void
3302 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3303 {
3304         struct sctp_association *asoc;
3305         struct sctp_nets *net, *prev;
3306         struct sctp_laddr *laddr;
3307         struct sctp_tmit_chunk *chk;
3308         struct sctp_asconf_addr *aparam;
3309         struct sctp_socket_q_list *sq;
3310
3311         /* first, lets purge the entry from the hash table. */
3312         if (stcb->asoc.state == 0) {
3313                 kprintf("Freeing already free association:%p - huh??\n",
3314                     stcb);
3315                 return;
3316         }
3317         asoc = &stcb->asoc;
3318         asoc->state = 0;
3319         /* now clean up any other timers */
3320         callout_stop(&asoc->hb_timer.timer);
3321         callout_stop(&asoc->dack_timer.timer);
3322         callout_stop(&asoc->asconf_timer.timer);
3323         callout_stop(&asoc->shut_guard_timer.timer);
3324         callout_stop(&asoc->autoclose_timer.timer);
3325         callout_stop(&asoc->delayed_event_timer.timer);
3326         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3327                 callout_stop(&net->rxt_timer.timer);
3328                 callout_stop(&net->pmtu_timer.timer);
3329         }
3330
3331         /* Iterator asoc being freed we send an
3332          * unlocked TCB. It returns with INP_INFO
3333          * and INP write locked and the TCB locked
3334          * too and of course the iterator lock
3335          * in place as well..
3336          */
3337         SCTP_TCB_UNLOCK(stcb);
3338         sctp_iterator_asoc_being_freed(inp, stcb);
3339
3340         /* Null all of my entry's on the socket q */
3341         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3342                 if (sq->tcb == stcb) {
3343                         sq->tcb = NULL;
3344                 }
3345         }
3346
3347         if (inp->sctp_tcb_at_block == (void *)stcb) {
3348                 inp->error_on_block = ECONNRESET;
3349         }
3350
3351         if (inp->sctp_tcbhash) {
3352                 LIST_REMOVE(stcb, sctp_tcbhash);
3353         }
3354         /* Now lets remove it from the list of ALL associations in the EP */
3355         LIST_REMOVE(stcb, sctp_tcblist);
3356         SCTP_INP_WUNLOCK(inp);
3357         SCTP_ITERATOR_UNLOCK();
3358
3359
3360         /* pull from vtag hash */
3361         LIST_REMOVE(stcb, sctp_asocs);
3362
3363         /*
3364          * Now before we can free the assoc, we must  remove all of the
3365          * networks and any other allocated space.. i.e. add removes here
3366          * before the SCTP_ZONE_FREE() of the tasoc entry.
3367          */
3368
3369         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3370         SCTP_INP_INFO_WUNLOCK();
3371         prev = NULL;
3372         while (!TAILQ_EMPTY(&asoc->nets)) {
3373                 net = TAILQ_FIRST(&asoc->nets);
3374                 /* pull from list */
3375                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3376                         break;
3377                 }
3378                 prev = net;
3379                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3380                 /* free it */
3381                 net->ref_count = 0;
3382                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3383                 sctppcbinfo.ipi_count_raddr--;
3384         }
3385         /*
3386          * The chunk lists and such SHOULD be empty but we check them
3387          * just in case.
3388          */
3389         /* anything on the wheel needs to be removed */
3390         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3391                 struct sctp_stream_out *outs;
3392                 outs = TAILQ_FIRST(&asoc->out_wheel);
3393                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3394                 /* now clean up any chunks here */
3395                 chk = TAILQ_FIRST(&outs->outqueue);
3396                 while (chk) {
3397                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3398                         if (chk->data) {
3399                                 sctp_m_freem(chk->data);
3400                                 chk->data = NULL;
3401                         }
3402                         chk->whoTo = NULL;
3403                         chk->asoc = NULL;
3404                         /* Free the chunk */
3405                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3406                         sctppcbinfo.ipi_count_chunk--;
3407                         sctppcbinfo.ipi_gencnt_chunk++;
3408                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3409                                 panic("Chunk count is negative");
3410                         }
3411                         chk = TAILQ_FIRST(&outs->outqueue);
3412                 }
3413                 outs = TAILQ_FIRST(&asoc->out_wheel);
3414         }
3415
3416         if (asoc->pending_reply) {
3417                 kfree(asoc->pending_reply, M_PCB);
3418                 asoc->pending_reply = NULL;
3419         }
3420         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3421         while (chk) {
3422                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3423                 if (chk->data) {
3424                         sctp_m_freem(chk->data);
3425                         chk->data = NULL;
3426                 }
3427                 chk->whoTo = NULL;
3428                 chk->asoc = NULL;
3429                 /* Free the chunk */
3430                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3431                 sctppcbinfo.ipi_count_chunk--;
3432                 sctppcbinfo.ipi_gencnt_chunk++;
3433                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3434                         panic("Chunk count is negative");
3435                 }
3436                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3437         }
3438         /* pending send queue SHOULD be empty */
3439         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3440                 chk = TAILQ_FIRST(&asoc->send_queue);
3441                 while (chk) {
3442                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3443                         if (chk->data) {
3444                                 sctp_m_freem(chk->data);
3445                                 chk->data = NULL;
3446                         }
3447                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3448                         sctppcbinfo.ipi_count_chunk--;
3449                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3450                                 panic("Chunk count is negative");
3451                         }
3452                         sctppcbinfo.ipi_gencnt_chunk++;
3453                         chk = TAILQ_FIRST(&asoc->send_queue);
3454                 }
3455         }
3456         /* sent queue SHOULD be empty */
3457         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3458                 chk = TAILQ_FIRST(&asoc->sent_queue);
3459                 while (chk) {
3460                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3461                         if (chk->data) {
3462                                 sctp_m_freem(chk->data);
3463                                 chk->data = NULL;
3464                         }
3465                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3466                         sctppcbinfo.ipi_count_chunk--;
3467                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3468                                 panic("Chunk count is negative");
3469                         }
3470                         sctppcbinfo.ipi_gencnt_chunk++;
3471                         chk = TAILQ_FIRST(&asoc->sent_queue);
3472                 }
3473         }
3474         /* control queue MAY not be empty */
3475         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3476                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3477                 while (chk) {
3478                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3479                         if (chk->data) {
3480                                 sctp_m_freem(chk->data);
3481                                 chk->data = NULL;
3482                         }
3483                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3484                         sctppcbinfo.ipi_count_chunk--;
3485                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3486                                 panic("Chunk count is negative");
3487                         }
3488                         sctppcbinfo.ipi_gencnt_chunk++;
3489                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3490                 }
3491         }
3492         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3493                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3494                 while (chk) {
3495                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3496                         if (chk->data) {
3497                                 sctp_m_freem(chk->data);
3498                                 chk->data = NULL;
3499                         }
3500                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3501                         sctppcbinfo.ipi_count_chunk--;
3502                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3503                                 panic("Chunk count is negative");
3504                         }
3505                         sctppcbinfo.ipi_gencnt_chunk++;
3506                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3507                 }
3508         }
3509         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3510                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3511                 while (chk) {
3512                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3513                         if (chk->data) {
3514                                 sctp_m_freem(chk->data);
3515                                 chk->data = NULL;
3516                         }
3517                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3518                         sctppcbinfo.ipi_count_chunk--;
3519                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3520                                 panic("Chunk count is negative");
3521                         }
3522                         sctppcbinfo.ipi_gencnt_chunk++;
3523                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3524                 }
3525         }
3526         if (asoc->mapping_array) {
3527                 kfree(asoc->mapping_array, M_PCB);
3528                 asoc->mapping_array = NULL;
3529         }
3530
3531         /* the stream outs */
3532         if (asoc->strmout) {
3533                 kfree(asoc->strmout, M_PCB);
3534                 asoc->strmout = NULL;
3535         }
3536         asoc->streamoutcnt = 0;
3537         if (asoc->strmin) {
3538                 int i;
3539                 for (i = 0; i < asoc->streamincnt; i++) {
3540                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3541                                 /* We have somethings on the streamin queue */
3542                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3543                                 while (chk) {
3544                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3545                                             chk, sctp_next);
3546                                         if (chk->data) {
3547                                                 sctp_m_freem(chk->data);
3548                                                 chk->data = NULL;
3549                                         }
3550                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3551                                             chk);
3552                                         sctppcbinfo.ipi_count_chunk--;
3553                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3554                                                 panic("Chunk count is negative");
3555                                         }
3556                                         sctppcbinfo.ipi_gencnt_chunk++;
3557                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3558                                 }
3559                         }
3560                 }
3561                 kfree(asoc->strmin, M_PCB);
3562                 asoc->strmin = NULL;
3563         }
3564         asoc->streamincnt = 0;
3565         /* local addresses, if any */
3566         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3567                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3568                 LIST_REMOVE(laddr, sctp_nxt_addr);
3569                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3570                 sctppcbinfo.ipi_count_laddr--;
3571         }
3572         /* pending asconf (address) parameters */
3573         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3574                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3575                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3576                 kfree(aparam, M_PCB);
3577         }
3578         if (asoc->last_asconf_ack_sent != NULL) {
3579                 sctp_m_freem(asoc->last_asconf_ack_sent);
3580                 asoc->last_asconf_ack_sent = NULL;
3581         }
3582         /* Insert new items here :> */
3583
3584         /* Get rid of LOCK */
3585         SCTP_TCB_LOCK_DESTROY(stcb);
3586
3587         /* now clean up the tasoc itself */
3588         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3589         sctppcbinfo.ipi_count_asoc--;
3590         if ((inp->sctp_socket->so_snd.ssb_cc) ||
3591             (inp->sctp_socket->so_snd.ssb_mbcnt)) {
3592                 /* This will happen when a abort is done */
3593                 inp->sctp_socket->so_snd.ssb_cc = 0;
3594                 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
3595         }
3596         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3597                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3598                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3599                                 /*
3600                                  * For the base fd, that is NOT in TCP pool we
3601