kernel/netinet: Remove some unused variables.
[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         int lport;
967 #ifdef SCTP_DEBUG
968         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
969                 kprintf("Looking for endpoint %d :",
970                        ntohs(((struct sockaddr_in *)nam)->sin_port));
971                 sctp_print_address(nam);
972         }
973 #endif
974         if (nam->sa_family == AF_INET) {
975                 lport = ((struct sockaddr_in *)nam)->sin_port;
976         } else if (nam->sa_family == AF_INET6) {
977                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
978         } else {
979                 /* unsupported family */
980                 return (NULL);
981         }
982         /*
983          * I could cheat here and just cast to one of the types but we will
984          * do it right. It also provides the check against an Unsupported
985          * type too.
986          */
987         /* Find the head of the ALLADDR chain */
988         if (have_lock == 0)
989                 SCTP_INP_INFO_RLOCK();
990         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
991                                                              sctppcbinfo.hashmark)];
992 #ifdef SCTP_DEBUG
993         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
994                 kprintf("Main hash to lookup at head:%p\n", head);
995         }
996 #endif
997         inp = sctp_endpoint_probe(nam, head, lport);
998
999         /*
1000          * If the TCP model exists it could be that the main listening
1001          * endpoint is gone but there exists a connected socket for this
1002          * guy yet. If so we can return the first one that we find. This
1003          * may NOT be the correct one but the sctp_findassociation_ep_addr
1004          * has further code to look at all TCP models.
1005          */
1006         if (inp == NULL && find_tcp_pool) {
1007                 unsigned int i;
1008 #ifdef SCTP_DEBUG
1009                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1010                         kprintf("EP was NULL and TCP model is supported\n");
1011                 }
1012 #endif
1013                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1014                         /*
1015                          * This is real gross, but we do NOT have a remote
1016                          * port at this point depending on who is calling. We
1017                          * must therefore look for ANY one that matches our
1018                          * local port :/
1019                          */
1020                         head = &sctppcbinfo.sctp_tcpephash[i];
1021                         if (LIST_FIRST(head)) {
1022                                 inp = sctp_endpoint_probe(nam, head, lport);
1023                                 if (inp) {
1024                                         /* Found one */
1025                                         break;
1026                                 }
1027                         }
1028                 }
1029         }
1030 #ifdef SCTP_DEBUG
1031         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1032                 kprintf("EP to return is %p\n", inp);
1033         }
1034 #endif
1035         if (have_lock == 0) {
1036                 if (inp) {
1037                         SCTP_INP_WLOCK(inp);
1038                         SCTP_INP_INCR_REF(inp);
1039                         SCTP_INP_WUNLOCK(inp);
1040                 }
1041                 SCTP_INP_INFO_RUNLOCK();
1042         } else {
1043                 if (inp) {
1044                         SCTP_INP_WLOCK(inp);
1045                         SCTP_INP_INCR_REF(inp);
1046                         SCTP_INP_WUNLOCK(inp);
1047                 }
1048         }
1049         return (inp);
1050 }
1051
1052 /*
1053  * Find an association for an endpoint with the pointer to whom you want
1054  * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1055  * We may need to change the *to to some other struct like a mbuf...
1056  */
1057 struct sctp_tcb *
1058 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1059     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1060 {
1061         struct sctp_inpcb *inp;
1062         struct sctp_tcb *retval;
1063
1064         SCTP_INP_INFO_RLOCK();
1065         if (find_tcp_pool) {
1066                 if (inp_p != NULL) {
1067                         retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1068                 } else {
1069                         retval = sctp_tcb_special_locate(&inp, from, to, netp);
1070                 }
1071                 if (retval != NULL) {
1072                         SCTP_INP_INFO_RUNLOCK();
1073                         return (retval);
1074                 }
1075         }
1076         inp = sctp_pcb_findep(to, 0, 1);
1077         if (inp_p != NULL) {
1078                 *inp_p = inp;
1079         }
1080         SCTP_INP_INFO_RUNLOCK();
1081
1082         if (inp == NULL) {
1083                 return (NULL);
1084         }
1085
1086         /*
1087          * ok, we have an endpoint, now lets find the assoc for it (if any)
1088          * we now place the source address or from in the to of the find
1089          * endpoint call. Since in reality this chain is used from the
1090          * inbound packet side.
1091          */
1092         if (inp_p != NULL) {
1093                 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1094         } else {
1095                 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1096         }
1097 }
1098
1099
1100 /*
1101  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1102  * find all addresses that the sender has specified in any address list.
1103  * Each address will be used to lookup the TCB and see if one exits.
1104  */
1105 static struct sctp_tcb *
1106 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1107     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1108     struct sockaddr *dest)
1109 {
1110         struct sockaddr_in sin4;
1111         struct sockaddr_in6 sin6;
1112         struct sctp_paramhdr *phdr, parm_buf;
1113         struct sctp_tcb *retval;
1114         u_int32_t ptype, plen;
1115
1116         memset(&sin4, 0, sizeof(sin4));
1117         memset(&sin6, 0, sizeof(sin6));
1118         sin4.sin_len = sizeof(sin4);
1119         sin4.sin_family = AF_INET;
1120         sin4.sin_port = sh->src_port;
1121         sin6.sin6_len = sizeof(sin6);
1122         sin6.sin6_family = AF_INET6;
1123         sin6.sin6_port = sh->src_port;
1124
1125         retval = NULL;
1126         offset += sizeof(struct sctp_init_chunk);
1127
1128         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1129         while (phdr != NULL) {
1130                 /* now we must see if we want the parameter */
1131                 ptype = ntohs(phdr->param_type);
1132                 plen = ntohs(phdr->param_length);
1133                 if (plen == 0) {
1134 #ifdef SCTP_DEBUG
1135                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1136                                 kprintf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1137                         }
1138 #endif /* SCTP_DEBUG */
1139                         break;
1140                 }
1141                 if (ptype == SCTP_IPV4_ADDRESS &&
1142                     plen == sizeof(struct sctp_ipv4addr_param)) {
1143                         /* Get the rest of the address */
1144                         struct sctp_ipv4addr_param ip4_parm, *p4;
1145
1146                         phdr = sctp_get_next_param(m, offset,
1147                             (struct sctp_paramhdr *)&ip4_parm, plen);
1148                         if (phdr == NULL) {
1149                                 return (NULL);
1150                         }
1151                         p4 = (struct sctp_ipv4addr_param *)phdr;
1152                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1153                         /* look it up */
1154                         retval = sctp_findassociation_ep_addr(inp_p,
1155                             (struct sockaddr *)&sin4, netp, dest, NULL);
1156                         if (retval != NULL) {
1157                                 return (retval);
1158                         }
1159                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1160                     plen == sizeof(struct sctp_ipv6addr_param)) {
1161                         /* Get the rest of the address */
1162                         struct sctp_ipv6addr_param ip6_parm, *p6;
1163
1164                         phdr = sctp_get_next_param(m, offset,
1165                             (struct sctp_paramhdr *)&ip6_parm, plen);
1166                         if (phdr == NULL) {
1167                                 return (NULL);
1168                         }
1169                         p6 = (struct sctp_ipv6addr_param *)phdr;
1170                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1171                         /* look it up */
1172                         retval = sctp_findassociation_ep_addr(inp_p,
1173                             (struct sockaddr *)&sin6, netp, dest, NULL);
1174                         if (retval != NULL) {
1175                                 return (retval);
1176                         }
1177                 }
1178                 offset += SCTP_SIZE32(plen);
1179                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1180                     sizeof(parm_buf));
1181         }
1182         return (NULL);
1183 }
1184
1185 static struct sctp_tcb *
1186 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1187     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1188     uint16_t lport)
1189 {
1190         /*
1191          * Use my vtag to hash. If we find it we then verify the source addr
1192          * is in the assoc. If all goes well we save a bit on rec of a packet.
1193          */
1194         struct sctpasochead *head;
1195         struct sctp_nets *net;
1196         struct sctp_tcb *stcb;
1197
1198         SCTP_INP_INFO_RLOCK();
1199         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1200             sctppcbinfo.hashasocmark)];
1201         if (head == NULL) {
1202                 /* invalid vtag */
1203                 SCTP_INP_INFO_RUNLOCK();
1204                 return (NULL);
1205         }
1206         LIST_FOREACH(stcb, head, sctp_asocs) {
1207                 SCTP_INP_RLOCK(stcb->sctp_ep);
1208                 SCTP_TCB_LOCK(stcb);
1209                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1210                 if (stcb->asoc.my_vtag == vtag) {
1211                         /* candidate */
1212                         if (stcb->rport != rport) {
1213                                 /*
1214                                  * we could remove this if vtags are unique
1215                                  * across the system.
1216                                  */
1217                                 SCTP_TCB_UNLOCK(stcb);
1218                                 continue;
1219                         }
1220                         if (stcb->sctp_ep->sctp_lport != lport) {
1221                                 /*
1222                                  * we could remove this if vtags are unique
1223                                  * across the system.
1224                                  */
1225                                 SCTP_TCB_UNLOCK(stcb);
1226                                 continue;
1227                         }
1228                         net = sctp_findnet(stcb, from);
1229                         if (net) {
1230                                 /* yep its him. */
1231                                 *netp = net;
1232                                 sctp_pegs[SCTP_VTAG_EXPR]++;
1233                                 *inp_p = stcb->sctp_ep;
1234                                 SCTP_INP_INFO_RUNLOCK();
1235                                 return (stcb);
1236                         } else {
1237                                 /* not him, this should only
1238                                  * happen in rare cases so
1239                                  * I peg it.
1240                                  */
1241                                 sctp_pegs[SCTP_VTAG_BOGUS]++;
1242                         }
1243                 }
1244                 SCTP_TCB_UNLOCK(stcb);
1245         }
1246         SCTP_INP_INFO_RUNLOCK();
1247         return (NULL);
1248 }
1249
1250 /*
1251  * Find an association with the pointer to the inbound IP packet. This
1252  * can be a IPv4 or IPv6 packet.
1253  */
1254 struct sctp_tcb *
1255 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1256     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1257     struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1258 {
1259         int find_tcp_pool;
1260         struct ip *iph;
1261         struct sctp_tcb *retval;
1262         struct sockaddr_storage to_store, from_store;
1263         struct sockaddr *to = (struct sockaddr *)&to_store;
1264         struct sockaddr *from = (struct sockaddr *)&from_store;
1265         struct sctp_inpcb *inp;
1266
1267
1268         iph = mtod(m, struct ip *);
1269         if (iph->ip_v == IPVERSION) {
1270                 /* its IPv4 */
1271                 struct sockaddr_in *to4, *from4;
1272
1273                 to4 = (struct sockaddr_in *)&to_store;
1274                 from4 = (struct sockaddr_in *)&from_store;
1275                 bzero(to4, sizeof(*to4));
1276                 bzero(from4, sizeof(*from4));
1277                 from4->sin_family = to4->sin_family = AF_INET;
1278                 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1279                 from4->sin_addr.s_addr  = iph->ip_src.s_addr;
1280                 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1281                 from4->sin_port = sh->src_port;
1282                 to4->sin_port = sh->dest_port;
1283         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1284                 /* its IPv6 */
1285                 struct ip6_hdr *ip6;
1286                 struct sockaddr_in6 *to6, *from6;
1287
1288                 ip6 = mtod(m, struct ip6_hdr *);
1289                 to6 = (struct sockaddr_in6 *)&to_store;
1290                 from6 = (struct sockaddr_in6 *)&from_store;
1291                 bzero(to6, sizeof(*to6));
1292                 bzero(from6, sizeof(*from6));
1293                 from6->sin6_family = to6->sin6_family = AF_INET6;
1294                 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1295                 to6->sin6_addr = ip6->ip6_dst;
1296                 from6->sin6_addr = ip6->ip6_src;
1297                 from6->sin6_port = sh->src_port;
1298                 to6->sin6_port = sh->dest_port;
1299                 /* Get the scopes in properly to the sin6 addr's */
1300                 in6_recoverscope(to6, &to6->sin6_addr, NULL);
1301 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1302                 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1303 #else
1304                 in6_embedscope(&to6->sin6_addr, to6);
1305 #endif
1306
1307                 in6_recoverscope(from6, &from6->sin6_addr, NULL);
1308 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1309                 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1310 #else
1311                 in6_embedscope(&from6->sin6_addr, from6);
1312 #endif
1313         } else {
1314                 /* Currently not supported. */
1315                 return (NULL);
1316         }
1317 #ifdef SCTP_DEBUG
1318         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1319                 kprintf("Looking for port %d address :",
1320                        ntohs(((struct sockaddr_in *)to)->sin_port));
1321                 sctp_print_address(to);
1322                 kprintf("From for port %d address :",
1323                        ntohs(((struct sockaddr_in *)from)->sin_port));
1324                 sctp_print_address(from);
1325         }
1326 #endif
1327
1328         if (sh->v_tag) {
1329                 /* we only go down this path if vtag is non-zero */
1330                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1331                     inp_p, netp, sh->src_port, sh->dest_port);
1332                 if (retval) {
1333                         return (retval);
1334                 }
1335         }
1336         find_tcp_pool = 0;
1337         if ((ch->chunk_type != SCTP_INITIATION) &&
1338             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1339             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1340             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1341                 /* Other chunk types go to the tcp pool. */
1342                 find_tcp_pool = 1;
1343         }
1344         if (inp_p) {
1345                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1346                     find_tcp_pool);
1347                 inp = *inp_p;
1348         } else {
1349                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1350                     find_tcp_pool);
1351         }
1352 #ifdef SCTP_DEBUG
1353         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1354                 kprintf("retval:%p inp:%p\n", retval, inp);
1355         }
1356 #endif
1357         if (retval == NULL && inp) {
1358                 /* Found a EP but not this address */
1359 #ifdef SCTP_DEBUG
1360                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1361                         kprintf("Found endpoint %p but no asoc - ep state:%x\n",
1362                             inp, inp->sctp_flags);
1363                 }
1364 #endif
1365                 if ((ch->chunk_type == SCTP_INITIATION) ||
1366                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1367                         /*
1368                          * special hook, we do NOT return linp or an
1369                          * association that is linked to an existing
1370                          * association that is under the TCP pool (i.e. no
1371                          * listener exists). The endpoint finding routine
1372                          * will always find a listner before examining the
1373                          * TCP pool.
1374                          */
1375                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1376 #ifdef SCTP_DEBUG
1377                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1378                                         kprintf("Gak, its in the TCP pool... return NULL");
1379                                 }
1380 #endif
1381                                 if (inp_p) {
1382                                         *inp_p = NULL;
1383                                 }
1384                                 return (NULL);
1385                         }
1386 #ifdef SCTP_DEBUG
1387                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1388                                 kprintf("Now doing SPECIAL find\n");
1389                         }
1390 #endif
1391                         retval = sctp_findassociation_special_addr(m, iphlen,
1392                             offset, sh, inp_p, netp, to);
1393                 }
1394         }
1395 #ifdef SCTP_DEBUG
1396         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1397             kprintf("retval is %p\n", retval);
1398         }
1399 #endif
1400         return (retval);
1401 }
1402
1403 extern int sctp_max_burst_default;
1404
1405 extern unsigned int sctp_delayed_sack_time_default;
1406 extern unsigned int sctp_heartbeat_interval_default;
1407 extern unsigned int sctp_pmtu_raise_time_default;
1408 extern unsigned int sctp_shutdown_guard_time_default;
1409 extern unsigned int sctp_secret_lifetime_default;
1410
1411 extern unsigned int sctp_rto_max_default;
1412 extern unsigned int sctp_rto_min_default;
1413 extern unsigned int sctp_rto_initial_default;
1414 extern unsigned int sctp_init_rto_max_default;
1415 extern unsigned int sctp_valid_cookie_life_default;
1416 extern unsigned int sctp_init_rtx_max_default;
1417 extern unsigned int sctp_assoc_rtx_max_default;
1418 extern unsigned int sctp_path_rtx_max_default;
1419 extern unsigned int sctp_nr_outgoing_streams_default;
1420
1421 /*
1422  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1423  * addresses. This way if we don't get a bind we by default pick a ephemeral
1424  * port with all addresses bound.
1425  */
1426 int
1427 sctp_inpcb_alloc(struct socket *so)
1428 {
1429         /*
1430          * we get called when a new endpoint starts up. We need to allocate
1431          * the sctp_inpcb structure from the zone and init it. Mark it as
1432          * unbound and find a port that we can use as an ephemeral with
1433          * INADDR_ANY. If the user binds later no problem we can then add
1434          * in the specific addresses. And setup the default parameters for
1435          * the EP.
1436          */
1437         int i, error;
1438         struct sctp_inpcb *inp, *n_inp;
1439         struct sctp_pcb *m;
1440         struct timeval time;
1441
1442         error = 0;
1443
1444         /* Hack alert:
1445          *
1446          * This code audits the entire INP list to see if
1447          * any ep's that are in the GONE state are now
1448          * all free. This should not happen really since when
1449          * the last association if freed we should end up deleting
1450          * the inpcb. This code including the locks should
1451          * be taken out ... since the last set of fixes I
1452          * have not seen the "Found a GONE on list" has not
1453          * came out. But i am paranoid and we will leave this
1454          * in at the cost of efficency on allocation of PCB's.
1455          * Probably we should move this to the invariant
1456          * compile options
1457          */
1458 /* #ifdef INVARIANTS*/
1459         SCTP_INP_INFO_RLOCK();
1460         inp = LIST_FIRST(&sctppcbinfo.listhead);
1461         while (inp) {
1462                 n_inp = LIST_NEXT(inp, sctp_list);
1463                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1464                         if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1465                                 /* finish the job now */
1466                                 kprintf("Found a GONE on list\n");
1467                                 SCTP_INP_INFO_RUNLOCK();
1468                                 sctp_inpcb_free(inp, 1);
1469                                 SCTP_INP_INFO_RLOCK();
1470                         }
1471                 }
1472                 inp = n_inp;
1473         }
1474         SCTP_INP_INFO_RUNLOCK();
1475 /* #endif INVARIANTS*/
1476
1477         SCTP_INP_INFO_WLOCK();
1478         inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1479         if (inp == NULL) {
1480                 kprintf("Out of SCTP-INPCB structures - no resources\n");
1481                 SCTP_INP_INFO_WUNLOCK();
1482                 return (ENOBUFS);
1483         }
1484
1485         /* zap it */
1486         bzero(inp, sizeof(*inp));
1487
1488         /* bump generations */
1489         inp->ip_inp.inp.inp_socket = so;
1490
1491         /* setup socket pointers */
1492         inp->sctp_socket = so;
1493
1494         /* setup inpcb socket too */
1495         inp->ip_inp.inp.inp_socket = so;
1496         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1497 #ifdef IPSEC
1498 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1499         {
1500                 struct inpcbpolicy *pcb_sp = NULL;
1501                 error = ipsec_init_policy(so, &pcb_sp);
1502                 /* Arrange to share the policy */
1503                 inp->ip_inp.inp.inp_sp = pcb_sp;
1504                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1505         }
1506 #else
1507         /* not sure what to do for openbsd here */
1508         error = 0;
1509 #endif
1510         if (error != 0) {
1511                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1512                 SCTP_INP_INFO_WUNLOCK();
1513                 return error;
1514         }
1515 #endif /* IPSEC */
1516         sctppcbinfo.ipi_count_ep++;
1517 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1518         inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1519         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1520 #else
1521         inp->inp_ip_ttl = ip_defttl;
1522         inp->inp_ip_tos = 0;
1523 #endif
1524
1525         so->so_pcb = (caddr_t)inp;
1526
1527         if ((so->so_type == SOCK_DGRAM) ||
1528             (so->so_type == SOCK_SEQPACKET)) {
1529                 /* UDP style socket */
1530                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1531                     SCTP_PCB_FLAGS_UNBOUND);
1532                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1533         } else if (so->so_type == SOCK_STREAM) {
1534                 /* TCP style socket */
1535                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1536                     SCTP_PCB_FLAGS_UNBOUND);
1537                 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1538         } else {
1539                 /*
1540                  * unsupported socket type (RAW, etc)- in case we missed
1541                  * it in protosw
1542                  */
1543                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1544                 SCTP_INP_INFO_WUNLOCK();
1545                 return (EOPNOTSUPP);
1546         }
1547         inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1548 #ifdef __NetBSD__
1549             HASH_LIST,
1550 #endif
1551             M_PCB,
1552 #if defined(__NetBSD__) || defined(__OpenBSD__)
1553             M_WAITOK,
1554 #endif
1555             &inp->sctp_hashmark);
1556         if (inp->sctp_tcbhash == NULL) {
1557                 kprintf("Out of SCTP-INPCB->hashinit - no resources\n");
1558                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1559                 SCTP_INP_INFO_WUNLOCK();
1560                 return (ENOBUFS);
1561         }
1562         /* LOCK init's */
1563         SCTP_INP_LOCK_INIT(inp);
1564         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1565         /* lock the new ep */
1566         SCTP_INP_WLOCK(inp);
1567
1568         /* add it to the info area */
1569         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1570         SCTP_INP_INFO_WUNLOCK();
1571
1572         LIST_INIT(&inp->sctp_addr_list);
1573         LIST_INIT(&inp->sctp_asoc_list);
1574         TAILQ_INIT(&inp->sctp_queue_list);
1575         /* Init the timer structure for signature change */
1576 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1577         callout_init(&inp->sctp_ep.signature_change.timer, 0);
1578 #else
1579         callout_init(&inp->sctp_ep.signature_change.timer);
1580 #endif
1581         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1582
1583         /* now init the actual endpoint default data */
1584         m = &inp->sctp_ep;
1585
1586         /* setup the base timeout information */
1587         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1588         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1589         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1590         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1591         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1592         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1593         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1594         /* all max/min max are in ms */
1595         m->sctp_maxrto = sctp_rto_max_default;
1596         m->sctp_minrto = sctp_rto_min_default;
1597         m->initial_rto = sctp_rto_initial_default;
1598         m->initial_init_rto_max = sctp_init_rto_max_default;
1599
1600         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1601
1602         m->max_init_times = sctp_init_rtx_max_default;
1603         m->max_send_times = sctp_assoc_rtx_max_default;
1604         m->def_net_failure = sctp_path_rtx_max_default;
1605         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1606         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1607         m->max_burst = sctp_max_burst_default;
1608         /* number of streams to pre-open on a association */
1609         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1610
1611         /* Add adaption cookie */
1612         m->adaption_layer_indicator = 0x504C5253;
1613
1614         /* seed random number generator */
1615         m->random_counter = 1;
1616         m->store_at = SCTP_SIGNATURE_SIZE;
1617 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1618         read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1619 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1620         read_random(m->random_numbers, sizeof(m->random_numbers));
1621 #elif defined(__OpenBSD__)
1622         get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1623 #elif defined(__NetBSD__) && NRND > 0
1624         rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1625                          RND_EXTRACT_ANY);
1626 #else
1627         {
1628                 u_int32_t *ranm, *ranp;
1629                 ranp = (u_int32_t *)&m->random_numbers;
1630                 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1631                 if ((u_long)ranp % 4) {
1632                         /* not a even boundary? */
1633                         ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1634                 }
1635                 while (ranp < ranm) {
1636                         *ranp = random();
1637                         ranp++;
1638                 }
1639         }
1640 #endif
1641         sctp_fill_random_store(m);
1642
1643         /* Minimum cookie size */
1644         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1645                 sizeof(struct sctp_state_cookie);
1646         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1647
1648         /* Setup the initial secret */
1649         SCTP_GETTIME_TIMEVAL(&time);
1650         m->time_of_secret_change = time.tv_sec;
1651
1652         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1653                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1654         }
1655         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1656
1657         /* How long is a cookie good for ? */
1658         m->def_cookie_life = sctp_valid_cookie_life_default;
1659         SCTP_INP_WUNLOCK(inp);
1660         return (error);
1661 }
1662
1663
1664 void
1665 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1666     struct sctp_tcb *stcb)
1667 {
1668         uint16_t lport, rport;
1669         struct sctppcbhead *head;
1670         struct sctp_laddr *laddr, *oladdr;
1671
1672         SCTP_TCB_UNLOCK(stcb);
1673         SCTP_INP_INFO_WLOCK();
1674         SCTP_INP_WLOCK(old_inp);
1675         SCTP_INP_WLOCK(new_inp);
1676         SCTP_TCB_LOCK(stcb);
1677
1678         new_inp->sctp_ep.time_of_secret_change =
1679             old_inp->sctp_ep.time_of_secret_change;
1680         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1681             sizeof(old_inp->sctp_ep.secret_key));
1682         new_inp->sctp_ep.current_secret_number =
1683             old_inp->sctp_ep.current_secret_number;
1684         new_inp->sctp_ep.last_secret_number =
1685             old_inp->sctp_ep.last_secret_number;
1686         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1687
1688         /* Copy the port across */
1689         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1690         rport = stcb->rport;
1691         /* Pull the tcb from the old association */
1692         LIST_REMOVE(stcb, sctp_tcbhash);
1693         LIST_REMOVE(stcb, sctp_tcblist);
1694
1695         /* Now insert the new_inp into the TCP connected hash */
1696         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1697             sctppcbinfo.hashtcpmark)];
1698
1699         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1700
1701         /* Now move the tcb into the endpoint list */
1702         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1703         /*
1704          * Question, do we even need to worry about the ep-hash since
1705          * we only have one connection? Probably not :> so lets
1706          * get rid of it and not suck up any kernel memory in that.
1707          */
1708         SCTP_INP_INFO_WUNLOCK();
1709         stcb->sctp_socket = new_inp->sctp_socket;
1710         stcb->sctp_ep = new_inp;
1711         if (new_inp->sctp_tcbhash != NULL) {
1712                 hashdestroy(new_inp->sctp_tcbhash, M_PCB,
1713                     new_inp->sctp_hashmark);
1714                 new_inp->sctp_tcbhash = NULL;
1715         }
1716         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1717                 /* Subset bound, so copy in the laddr list from the old_inp */
1718                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1719                         laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1720                             sctppcbinfo.ipi_zone_laddr);
1721                         if (laddr == NULL) {
1722                                 /*
1723                                  * Gak, what can we do? This assoc is really
1724                                  * HOSED. We probably should send an abort
1725                                  * here.
1726                                  */
1727 #ifdef SCTP_DEBUG
1728                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1729                                         kprintf("Association hosed in TCP model, out of laddr memory\n");
1730                                 }
1731 #endif /* SCTP_DEBUG */
1732                                 continue;
1733                         }
1734                         sctppcbinfo.ipi_count_laddr++;
1735                         sctppcbinfo.ipi_gencnt_laddr++;
1736                         bzero(laddr, sizeof(*laddr));
1737                         laddr->ifa = oladdr->ifa;
1738                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1739                             sctp_nxt_addr);
1740                         new_inp->laddr_count++;
1741                 }
1742         }
1743         SCTP_INP_WUNLOCK(new_inp);
1744         SCTP_INP_WUNLOCK(old_inp);
1745 }
1746
1747 static int
1748 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1749 {
1750         struct sctppcbhead *head;
1751         struct sctp_inpcb *t_inp;
1752
1753         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1754             sctppcbinfo.hashmark)];
1755         LIST_FOREACH(t_inp, head, sctp_hash) {
1756                 if (t_inp->sctp_lport != lport) {
1757                         continue;
1758                 }
1759                 /* This one is in use. */
1760                 /* check the v6/v4 binding issue */
1761                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1762 #if defined(__FreeBSD__)
1763                     (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1764 #else
1765 #if defined(__OpenBSD__)
1766                     (0) /* For open bsd we do dual bind only */
1767 #else
1768                     (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1769 #endif
1770 #endif
1771                         ) {
1772                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1773                                 /* collision in V6 space */
1774                                 return (1);
1775                         } else {
1776                                 /* inp is BOUND_V4 no conflict */
1777                                 continue;
1778                         }
1779                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1780                         /* t_inp is bound v4 and v6, conflict always */
1781                         return (1);
1782                 } else {
1783                         /* t_inp is bound only V4 */
1784                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1785 #if defined(__FreeBSD__)
1786                             (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1787 #else
1788 #if defined(__OpenBSD__)
1789                             (0) /* For open bsd we do dual bind only */
1790 #else
1791                             (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1792 #endif
1793 #endif
1794                                 ) {
1795                                 /* no conflict */
1796                                 continue;
1797                         }
1798                         /* else fall through to conflict */
1799                 }
1800                 return (1);
1801         }
1802         return (0);
1803 }
1804
1805 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1806 /*
1807  * Don't know why, but without this there is an unknown reference when
1808  * compiling NetBSD... hmm
1809  */
1810 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1811 #endif
1812
1813
1814 int
1815 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1816 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1817 #else
1818 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1819 #endif
1820 {
1821         /* bind a ep to a socket address */
1822         struct sctppcbhead *head;
1823         struct sctp_inpcb *inp, *inp_tmp;
1824         struct inpcb *ip_inp;
1825         int bindall;
1826         uint16_t lport;
1827         int error;
1828
1829         lport = 0;
1830         error = 0;
1831         bindall = 1;
1832         inp = (struct sctp_inpcb *)so->so_pcb;
1833         ip_inp = (struct inpcb *)so->so_pcb;
1834 #ifdef SCTP_DEBUG
1835         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1836                 if (addr) {
1837                         kprintf("Bind called port:%d\n",
1838                                ntohs(((struct sockaddr_in *)addr)->sin_port));
1839                         kprintf("Addr :");
1840                         sctp_print_address(addr);
1841                 }
1842         }
1843 #endif /* SCTP_DEBUG */
1844         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1845                 /* already did a bind, subsequent binds NOT allowed ! */
1846                 return (EINVAL);
1847         }
1848
1849         if (addr != NULL) {
1850                 if (addr->sa_family == AF_INET) {
1851                         struct sockaddr_in *sin;
1852
1853                         /* IPV6_V6ONLY socket? */
1854                         if (
1855 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1856                                 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1857 #else
1858 #if defined(__OpenBSD__)
1859                                 (0)     /* For openbsd we do dual bind only */
1860 #else
1861                                 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1862 #endif
1863 #endif
1864                                 ) {
1865                                 return (EINVAL);
1866                         }
1867
1868                         if (addr->sa_len != sizeof(*sin))
1869                                 return (EINVAL);
1870
1871                         sin = (struct sockaddr_in *)addr;
1872                         lport = sin->sin_port;
1873
1874                         if (sin->sin_addr.s_addr != INADDR_ANY) {
1875                                 bindall = 0;
1876                         }
1877                 } else if (addr->sa_family == AF_INET6) {
1878                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1879                         struct sockaddr_in6 *sin6;
1880
1881                         sin6 = (struct sockaddr_in6 *)addr;
1882
1883                         if (addr->sa_len != sizeof(*sin6))
1884                                 return (EINVAL);
1885
1886                         lport = sin6->sin6_port;
1887                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1888                                 bindall = 0;
1889                                 /* KAME hack: embed scopeid */
1890 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1891                                 if (in6_embedscope(&sin6->sin6_addr, sin6,
1892                                     ip_inp, NULL) != 0)
1893                                         return (EINVAL);
1894 #elif defined(__FreeBSD__)
1895                                 error = scope6_check_id(sin6, ip6_use_defzone);
1896                                 if (error != 0)
1897                                         return (error);
1898 #else
1899                                 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1900                                         return (EINVAL);
1901                                 }
1902 #endif
1903                         }
1904 #ifndef SCOPEDROUTING
1905                         /* this must be cleared for ifa_ifwithaddr() */
1906                         sin6->sin6_scope_id = 0;
1907 #endif /* SCOPEDROUTING */
1908                 } else {
1909                         return (EAFNOSUPPORT);
1910                 }
1911         }
1912         SCTP_INP_INFO_WLOCK();
1913         SCTP_INP_WLOCK(inp);
1914         /* increase our count due to the unlock we do */
1915         SCTP_INP_INCR_REF(inp);
1916         if (lport) {
1917                 /*
1918                  * Did the caller specify a port? if so we must see if a
1919                  * ep already has this one bound.
1920                  */
1921                 /* got to be root to get at low ports */
1922                 if (ntohs(lport) < IPPORT_RESERVED) {
1923                         if (p && (error =
1924 #ifdef __FreeBSD__
1925 #if __FreeBSD_version >= 500000
1926                             suser_cred(p->td_ucred, 0)
1927 #else
1928                             suser(p)
1929 #endif
1930 #elif defined(__NetBSD__) || defined(__APPLE__)
1931                             suser(p->p_ucred, &p->p_acflag)
1932 #elif defined(__DragonFly__)
1933                             priv_check(p, PRIV_ROOT)
1934 #else
1935                             suser(p, 0)
1936 #endif
1937                             )) {
1938                                 SCTP_INP_DECR_REF(inp);
1939                                 SCTP_INP_WUNLOCK(inp);
1940                                 SCTP_INP_INFO_WUNLOCK();
1941                                 return (error);
1942                         }
1943                 }
1944                 if (p == NULL) {
1945                         SCTP_INP_DECR_REF(inp);
1946                         SCTP_INP_WUNLOCK(inp);
1947                         SCTP_INP_INFO_WUNLOCK();
1948                         return (error);
1949                 }
1950                 SCTP_INP_WUNLOCK(inp);
1951                 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1952                 if (inp_tmp != NULL) {
1953                         /* lock guy returned and lower count
1954                          * note that we are not bound so inp_tmp
1955                          * should NEVER be inp. And it is this
1956                          * inp (inp_tmp) that gets the reference
1957                          * bump, so we must lower it.
1958                          */
1959                         SCTP_INP_WLOCK(inp_tmp);
1960                         SCTP_INP_DECR_REF(inp_tmp);
1961                         SCTP_INP_WUNLOCK(inp_tmp);
1962
1963                         /* unlock info */
1964                         SCTP_INP_INFO_WUNLOCK();
1965                         return (EADDRNOTAVAIL);
1966                 }
1967                 SCTP_INP_WLOCK(inp);
1968                 if (bindall) {
1969                         /* verify that no lport is not used by a singleton */
1970                         if (sctp_isport_inuse(inp, lport)) {
1971                                 /* Sorry someone already has this one bound */
1972                                 SCTP_INP_DECR_REF(inp);
1973                                 SCTP_INP_WUNLOCK(inp);
1974                                 SCTP_INP_INFO_WUNLOCK();
1975                                 return (EADDRNOTAVAIL);
1976                         }
1977                 }
1978         } else {
1979                 /*
1980                  * get any port but lets make sure no one has any address
1981                  * with this port bound
1982                  */
1983
1984                 /*
1985                  * setup the inp to the top (I could use the union but this
1986                  * is just as easy
1987                  */
1988                 uint32_t port_guess;
1989                 uint16_t port_attempt;
1990                 int not_done=1;
1991
1992                 while (not_done) {
1993                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1994                         port_attempt = (port_guess &  0x0000ffff);
1995                         if (port_attempt == 0) {
1996                                 goto next_half;
1997                         }
1998                         if (port_attempt < IPPORT_RESERVED) {
1999                                 port_attempt += IPPORT_RESERVED;
2000                         }
2001
2002                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2003                                 /* got a port we can use */
2004                                 not_done = 0;
2005                                 continue;
2006                         }
2007                         /* try upper half */
2008                 next_half:
2009                         port_attempt = ((port_guess >> 16) &  0x0000ffff);
2010                         if (port_attempt == 0) {
2011                                 goto last_try;
2012                         }
2013                         if (port_attempt < IPPORT_RESERVED) {
2014                                 port_attempt += IPPORT_RESERVED;
2015                         }
2016                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2017                                 /* got a port we can use */
2018                                 not_done = 0;
2019                                 continue;
2020                         }
2021                         /* try two half's added together */
2022                 last_try:
2023                         port_attempt = (((port_guess >> 16) &  0x0000ffff) + (port_guess & 0x0000ffff));
2024                         if (port_attempt == 0) {
2025                                 /* get a new random number */
2026                                 continue;
2027                         }
2028                         if (port_attempt < IPPORT_RESERVED) {
2029                                 port_attempt += IPPORT_RESERVED;
2030                         }
2031                         if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2032                                 /* got a port we can use */
2033                                 not_done = 0;
2034                                 continue;
2035                         }
2036                 }
2037                 /* we don't get out of the loop until we have a port */
2038                 lport = htons(port_attempt);
2039         }
2040         SCTP_INP_DECR_REF(inp);
2041         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2042                 /* this really should not happen. The guy
2043                  * did a non-blocking bind and then did a close
2044                  * at the same time.
2045                  */
2046                 SCTP_INP_WUNLOCK(inp);
2047                 SCTP_INP_INFO_WUNLOCK();
2048                 return (EINVAL);
2049         }
2050         /* ok we look clear to give out this port, so lets setup the binding */
2051         if (bindall) {
2052                 /* binding to all addresses, so just set in the proper flags */
2053                 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2054                     SCTP_PCB_FLAGS_DO_ASCONF);
2055                 /* set the automatic addr changes from kernel flag */
2056                 if (sctp_auto_asconf == 0) {
2057                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2058                 } else {
2059                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2060                 }
2061         } else {
2062                 /*
2063                  * bind specific, make sure flags is off and add a new address
2064                  * structure to the sctp_addr_list inside the ep structure.
2065                  *
2066                  * We will need to allocate one and insert it at the head.
2067                  * The socketopt call can just insert new addresses in there
2068                  * as well. It will also have to do the embed scope kame hack
2069                  * too (before adding).
2070                  */
2071                 struct ifaddr *ifa;
2072                 struct sockaddr_storage store_sa;
2073
2074                 memset(&store_sa, 0, sizeof(store_sa));
2075                 if (addr->sa_family == AF_INET) {
2076                         struct sockaddr_in *sin;
2077
2078                         sin = (struct sockaddr_in *)&store_sa;
2079                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2080                         sin->sin_port = 0;
2081                 } else if (addr->sa_family == AF_INET6) {
2082                         struct sockaddr_in6 *sin6;
2083
2084                         sin6 = (struct sockaddr_in6 *)&store_sa;
2085                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2086                         sin6->sin6_port = 0;
2087                 }
2088                 /*
2089                  * first find the interface with the bound address
2090                  * need to zero out the port to find the address! yuck!
2091                  * can't do this earlier since need port for sctp_pcb_findep()
2092                  */
2093                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2094                 if (ifa == NULL) {
2095                         /* Can't find an interface with that address */
2096                         SCTP_INP_WUNLOCK(inp);
2097                         SCTP_INP_INFO_WUNLOCK();
2098                         return (EADDRNOTAVAIL);
2099                 }
2100                 if (addr->sa_family == AF_INET6) {
2101                         struct in6_ifaddr *ifa6;
2102                         ifa6 = (struct in6_ifaddr *)ifa;
2103                         /*
2104                          * allow binding of deprecated addresses as per
2105                          * RFC 2462 and ipng discussion
2106                          */
2107                         if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2108                             IN6_IFF_ANYCAST |
2109                             IN6_IFF_NOTREADY)) {
2110                                 /* Can't bind a non-existent addr. */
2111                                 SCTP_INP_WUNLOCK(inp);
2112                                 SCTP_INP_INFO_WUNLOCK();
2113                                 return (EINVAL);
2114                         }
2115                 }
2116                 /* we're not bound all */
2117                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2118 #if 0 /* use sysctl now */
2119                 /* don't allow automatic addr changes from kernel */
2120                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2121 #endif
2122                 /* set the automatic addr changes from kernel flag */
2123                 if (sctp_auto_asconf == 0) {
2124                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2125                 } else {
2126                         inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2127                 }
2128                 /* allow bindx() to send ASCONF's for binding changes */
2129                 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2130                 /* add this address to the endpoint list */
2131                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2132                 if (error != 0) {
2133                         SCTP_INP_WUNLOCK(inp);
2134                         SCTP_INP_INFO_WUNLOCK();
2135                         return (error);
2136                 }
2137                 inp->laddr_count++;
2138         }
2139         /* find the bucket */
2140         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2141             sctppcbinfo.hashmark)];
2142         /* put it in the bucket */
2143         LIST_INSERT_HEAD(head, inp, sctp_hash);
2144 #ifdef SCTP_DEBUG
2145         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2146                 kprintf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2147         }
2148 #endif
2149         /* set in the port */
2150         inp->sctp_lport = lport;
2151
2152         /* turn off just the unbound flag */
2153         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2154         SCTP_INP_WUNLOCK(inp);
2155         SCTP_INP_INFO_WUNLOCK();
2156         return (0);
2157 }
2158
2159
2160 static void
2161 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2162 {
2163         struct sctp_iterator *it;
2164         /* We enter with the only the ITERATOR_LOCK in place and
2165          * A write lock on the inp_info stuff.
2166          */
2167
2168         /* Go through all iterators, we must do this since
2169          * it is possible that some iterator does NOT have
2170          * the lock, but is waiting for it. And the one that
2171          * had the lock has either moved in the last iteration
2172          * or we just cleared it above. We need to find all
2173          * of those guys. The list of iterators should never
2174          * be very big though.
2175          */
2176         LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2177                 if (it == inp->inp_starting_point_for_iterator)
2178                         /* skip this guy, he's special */
2179                         continue;
2180                 if (it->inp == inp) {
2181                         /* This is tricky and we DON'T lock the iterator.
2182                          * Reason is he's running but waiting for me since
2183                          * inp->inp_starting_point_for_iterator has the lock
2184                          * on me (the guy above we skipped). This tells us
2185                          * its is not running but waiting for inp->inp_starting_point_for_iterator
2186                          * to be released by the guy that does have our INP in a lock.
2187                          */
2188                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2189                                 it->inp = NULL;
2190                                 it->stcb = NULL;
2191                         } else {
2192                                 /* set him up to do the next guy not me */
2193                                 it->inp = inp_next;
2194                                 it->stcb = NULL;
2195                         }
2196                 }
2197         }
2198         it = inp->inp_starting_point_for_iterator;
2199         if (it) {
2200                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2201                         it->inp = NULL;
2202                 } else {
2203                         it->inp = inp_next;
2204                 }
2205                 it->stcb = NULL;
2206         }
2207 }
2208
2209 /* release sctp_inpcb unbind the port */
2210 void
2211 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2212 {
2213         /*
2214          * Here we free a endpoint. We must find it (if it is in the Hash
2215          * table) and remove it from there. Then we must also find it in
2216          * the overall list and remove it from there. After all removals are
2217          * complete then any timer has to be stopped. Then start the actual
2218          * freeing.
2219          * a) Any local lists.
2220          * b) Any associations.
2221          * c) The hash of all associations.
2222          * d) finally the ep itself.
2223          */
2224         struct sctp_inpcb *inp_save;
2225         struct sctp_tcb *asoc, *nasoc;
2226         struct sctp_laddr *laddr, *nladdr;
2227         struct inpcb *ip_pcb;
2228         struct socket *so;
2229         struct sctp_socket_q_list *sq;
2230 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2231         struct rtentry *rt;
2232 #endif
2233         int cnt;
2234
2235         SCTP_ASOC_CREATE_LOCK(inp);
2236         SCTP_INP_WLOCK(inp);
2237
2238         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2239                 /* been here before */
2240                 kprintf("Endpoint was all gone (dup free)?\n");
2241                 SCTP_INP_WUNLOCK(inp);
2242                 SCTP_ASOC_CREATE_UNLOCK(inp);
2243                 return;
2244         }
2245         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2246
2247         if (inp->control) {
2248                 sctp_m_freem(inp->control);
2249                 inp->control = NULL;
2250         }
2251         if (inp->pkt) {
2252                 sctp_m_freem(inp->pkt);
2253                 inp->pkt = NULL;
2254         }
2255         so  = inp->sctp_socket;
2256         ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2257                                    * pointer here but I will
2258                                    * be nice :> (i.e. ip_pcb = ep;)
2259                                    */
2260
2261         if (immediate == 0) {
2262                 int cnt_in_sd;
2263                 cnt_in_sd = 0;
2264                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2265                      asoc = nasoc) {
2266                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2267                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2268                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2269                                 /* Just abandon things in the front states */
2270                                 SCTP_TCB_LOCK(asoc);
2271                                 SCTP_INP_WUNLOCK(inp);
2272                                 sctp_free_assoc(inp, asoc);
2273                                 SCTP_INP_WLOCK(inp);
2274                                 continue;
2275                         } else {
2276                                 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2277                         }
2278                         if ((asoc->asoc.size_on_delivery_queue  > 0) ||
2279                             (asoc->asoc.size_on_reasm_queue > 0) ||
2280                             (asoc->asoc.size_on_all_streams > 0) ||
2281                             (so && (so->so_rcv.ssb_cc > 0))
2282                                 ) {
2283                                 /* Left with Data unread */
2284                                 struct mbuf *op_err;
2285                                 MGET(op_err, MB_DONTWAIT, MT_DATA);
2286                                 if (op_err) {
2287                                         /* Fill in the user initiated abort */
2288                                         struct sctp_paramhdr *ph;
2289                                         op_err->m_len =
2290                                             sizeof(struct sctp_paramhdr);
2291                                         ph = mtod(op_err,
2292                                             struct sctp_paramhdr *);
2293                                         ph->param_type = htons(
2294                                             SCTP_CAUSE_USER_INITIATED_ABT);
2295                                         ph->param_length = htons(op_err->m_len);
2296                                 }
2297                                 SCTP_TCB_LOCK(asoc);
2298                                 sctp_send_abort_tcb(asoc, op_err);
2299
2300                                 SCTP_INP_WUNLOCK(inp);
2301                                 sctp_free_assoc(inp, asoc);
2302                                 SCTP_INP_WLOCK(inp);
2303                                 continue;
2304                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2305                             TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2306                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2307                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2308                                         /* there is nothing queued to send, so I send shutdown */
2309                                         SCTP_TCB_LOCK(asoc);
2310                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2311                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2312                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2313                                                          asoc->asoc.primary_destination);
2314                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2315                                                          asoc->asoc.primary_destination);
2316                                         sctp_chunk_output(inp, asoc, 1);
2317                                         SCTP_TCB_UNLOCK(asoc);
2318                                 }
2319                         } else {
2320                                 /* mark into shutdown pending */
2321                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2322                         }
2323                         cnt_in_sd++;
2324                 }
2325                 /* now is there some left in our SHUTDOWN state? */
2326                 if (cnt_in_sd) {
2327                         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2328                         SCTP_INP_WUNLOCK(inp);
2329                         SCTP_ASOC_CREATE_UNLOCK(inp);
2330                         return;
2331                 }
2332         }
2333 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2334         if (inp->refcount) {
2335                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2336                 SCTP_INP_WUNLOCK(inp);
2337                 SCTP_ASOC_CREATE_UNLOCK(inp);
2338                 return;
2339         }
2340 #endif
2341         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2342 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2343         rt = ip_pcb->inp_route.ro_rt;
2344 #endif
2345
2346         callout_stop(&inp->sctp_ep.signature_change.timer);
2347
2348         if (so) {
2349         /* First take care of socket level things */
2350 #ifdef IPSEC
2351 #ifdef __OpenBSD__
2352         /* XXX IPsec cleanup here */
2353                 if (ip_pcb->inp_tdb_in)
2354                     TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2355                                  ip_pcb, inp_tdb_in_next);
2356                 if (ip_pcb->inp_tdb_out)
2357                     TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2358                                  inp_tdb_out_next);
2359                 if (ip_pcb->inp_ipsec_localid)
2360                     ipsp_reffree(ip_pcb->inp_ipsec_localid);
2361                 if (ip_pcb->inp_ipsec_remoteid)
2362                     ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2363                 if (ip_pcb->inp_ipsec_localcred)
2364                     ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2365                 if (ip_pcb->inp_ipsec_remotecred)
2366                     ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2367                 if (ip_pcb->inp_ipsec_localauth)
2368                     ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2369                 if (ip_pcb->inp_ipsec_remoteauth)
2370                     ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2371 #else
2372                 ipsec4_delete_pcbpolicy(ip_pcb);
2373 #endif
2374 #endif /*IPSEC*/
2375 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2376                 ACCEPT_LOCK();
2377                 SOCK_LOCK(so);
2378 #endif
2379                 so->so_pcb = NULL;
2380                 sofree(so);
2381         }
2382
2383         if (ip_pcb->inp_options) {
2384                 m_free(ip_pcb->inp_options);
2385                 ip_pcb->inp_options = 0;
2386         }
2387 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2388         if (rt) {
2389                 RTFREE(rt);
2390                 ip_pcb->inp_route.ro_rt = 0;
2391         }
2392 #endif
2393         if (ip_pcb->inp_moptions) {
2394                 ip_freemoptions(ip_pcb->inp_moptions);
2395                 ip_pcb->inp_moptions = 0;
2396         }
2397 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2398         inp->inp_vflag = 0;
2399 #else
2400         ip_pcb->inp_vflag = 0;
2401 #endif
2402
2403         /* Now the sctp_pcb things */
2404
2405         /*
2406          * free each asoc if it is not already closed/free. we can't use
2407          * the macro here since le_next will get freed as part of the
2408          * sctp_free_assoc() call.
2409          */
2410         cnt = 0;
2411         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2412              asoc = nasoc) {
2413                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2414                 SCTP_TCB_LOCK(asoc);
2415                 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2416                         struct mbuf *op_err;
2417                         MGET(op_err, MB_DONTWAIT, MT_DATA);
2418                         if (op_err) {
2419                                 /* Fill in the user initiated abort */
2420                                 struct sctp_paramhdr *ph;
2421                                 op_err->m_len = sizeof(struct sctp_paramhdr);
2422                                 ph = mtod(op_err, struct sctp_paramhdr *);
2423                                 ph->param_type = htons(
2424                                     SCTP_CAUSE_USER_INITIATED_ABT);
2425                                 ph->param_length = htons(op_err->m_len);
2426                         }
2427                         sctp_send_abort_tcb(asoc, op_err);
2428                 }
2429                 cnt++;
2430                 /*
2431                  * sctp_free_assoc() will call sctp_inpcb_free(),
2432                  * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2433                  * So, we clear it before sctp_free_assoc() making sure
2434                  * no double sctp_inpcb_free().
2435                  */
2436                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2437                 SCTP_INP_WUNLOCK(inp);
2438                 sctp_free_assoc(inp, asoc);
2439                 SCTP_INP_WLOCK(inp);
2440         }
2441         while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2442                 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2443                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2444                 sctppcbinfo.ipi_count_sockq--;
2445                 sctppcbinfo.ipi_gencnt_sockq++;
2446         }
2447         inp->sctp_socket = 0;
2448         /* Now first we remove ourselves from the overall list of all EP's */
2449
2450         /* Unlock inp first, need correct order */
2451         SCTP_INP_WUNLOCK(inp);
2452         /* now iterator lock */
2453         SCTP_ITERATOR_LOCK();
2454         /* now info lock */
2455         SCTP_INP_INFO_WLOCK();
2456         /* now reget the inp lock */
2457         SCTP_INP_WLOCK(inp);
2458
2459         inp_save = LIST_NEXT(inp, sctp_list);
2460         LIST_REMOVE(inp, sctp_list);
2461         /*
2462          * Now the question comes as to if this EP was ever bound at all.
2463          * If it was, then we must pull it out of the EP hash list.
2464          */
2465         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2466             SCTP_PCB_FLAGS_UNBOUND) {
2467                 /*
2468                  * ok, this guy has been bound. It's port is somewhere
2469                  * in the sctppcbinfo hash table. Remove it!
2470                  */
2471                 LIST_REMOVE(inp, sctp_hash);
2472         }
2473         /* fix any iterators only after out of the list */
2474         sctp_iterator_inp_being_freed(inp, inp_save);
2475         SCTP_ITERATOR_UNLOCK();
2476         /*
2477          * if we have an address list the following will free the list of
2478          * ifaddr's that are set into this ep. Again macro limitations here,
2479          * since the LIST_FOREACH could be a bad idea.
2480          */
2481         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2482              laddr = nladdr) {
2483                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2484                 LIST_REMOVE(laddr, sctp_nxt_addr);
2485                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2486                 sctppcbinfo.ipi_gencnt_laddr++;
2487                 sctppcbinfo.ipi_count_laddr--;
2488         }
2489         /* Now lets see about freeing the EP hash table. */
2490         if (inp->sctp_tcbhash != NULL) {
2491                 hashdestroy(inp->sctp_tcbhash, M_PCB, inp->sctp_hashmark);
2492                 inp->sctp_tcbhash = 0;
2493         }
2494         SCTP_INP_WUNLOCK(inp);
2495         SCTP_ASOC_CREATE_UNLOCK(inp);
2496         SCTP_INP_LOCK_DESTROY(inp);
2497         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2498
2499         /* Now we must put the ep memory back into the zone pool */
2500         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2501         sctppcbinfo.ipi_count_ep--;
2502
2503         SCTP_INP_INFO_WUNLOCK();
2504 }
2505
2506
2507 struct sctp_nets *
2508 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2509 {
2510         struct sctp_nets *net;
2511 #if 0
2512         struct sockaddr_in *sin;
2513
2514         /* why do we need to check the port for a nets list on an assoc? */
2515         /* use the peer's/remote port for lookup if unspecified */
2516         sin = (struct sockaddr_in *)addr;
2517         if (stcb->rport != sin->sin_port) {
2518                 /* we cheat and just a sin for this test */
2519                 return (NULL);
2520         }
2521 #endif
2522         /* locate the address */
2523         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2524                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2525                         return (net);
2526         }
2527         return (NULL);
2528 }
2529
2530
2531 /*
2532  * add's a remote endpoint address, done with the INIT/INIT-ACK
2533  * as well as when a ASCONF arrives that adds it. It will also
2534  * initialize all the cwnd stats of stuff.
2535  */
2536 int
2537 sctp_is_address_on_local_host(struct sockaddr *addr)
2538 {
2539         struct ifnet *ifn;
2540
2541         TAILQ_FOREACH(ifn, &ifnet, if_list) {
2542                 struct ifaddr_container *ifac;
2543
2544                 TAILQ_FOREACH(ifac, &ifn->if_addrheads[mycpuid], ifa_link) {
2545                         struct ifaddr *ifa = ifac->ifa;
2546
2547                         if (addr->sa_family == ifa->ifa_addr->sa_family) {
2548                                 /* same family */
2549                                 if (addr->sa_family == AF_INET) {
2550                                         struct sockaddr_in *sin, *sin_c;
2551                                         sin = (struct sockaddr_in *)addr;
2552                                         sin_c = (struct sockaddr_in *)
2553                                             ifa->ifa_addr;
2554                                         if (sin->sin_addr.s_addr ==
2555                                             sin_c->sin_addr.s_addr) {
2556                                                 /* we are on the same machine */
2557                                                 return (1);
2558                                         }
2559                                 } else if (addr->sa_family == AF_INET6) {
2560                                         struct sockaddr_in6 *sin6, *sin_c6;
2561                                         sin6 = (struct sockaddr_in6 *)addr;
2562                                         sin_c6 = (struct sockaddr_in6 *)
2563                                             ifa->ifa_addr;
2564                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2565                                             &sin_c6->sin6_addr)) {
2566                                                 /* we are on the same machine */
2567                                                 return (1);
2568                                         }
2569                                 }
2570                         }
2571                 }
2572         }
2573         return (0);
2574 }
2575
2576 int
2577 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2578     int set_scope, int from)
2579 {
2580         /*
2581          * The following is redundant to the same lines in the
2582          * sctp_aloc_assoc() but is needed since other's call the add
2583          * address function
2584          */
2585         struct sctp_nets *net, *netfirst;
2586         int addr_inscope;
2587
2588 #ifdef SCTP_DEBUG
2589         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2590                 kprintf("Adding an address (from:%d) to the peer: ", from);
2591                 sctp_print_address(newaddr);
2592         }
2593 #endif
2594         netfirst = sctp_findnet(stcb, newaddr);
2595         if (netfirst) {
2596                 /*
2597                  * Lie and return ok, we don't want to make the association
2598                  * go away for this behavior. It will happen in the TCP model
2599                  * in a connected socket. It does not reach the hash table
2600                  * until after the association is built so it can't be found.
2601                  * Mark as reachable, since the initial creation will have
2602                  * been cleared and the NOT_IN_ASSOC flag will have been
2603                  * added... and we don't want to end up removing it back out.
2604                  */
2605                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2606                         netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2607                             SCTP_ADDR_UNCONFIRMED);
2608                 } else {
2609                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2610                 }
2611
2612                 return (0);
2613         }
2614         addr_inscope = 1;
2615         if (newaddr->sa_family == AF_INET) {
2616                 struct sockaddr_in *sin;
2617                 sin = (struct sockaddr_in *)newaddr;
2618                 if (sin->sin_addr.s_addr == 0) {
2619                         /* Invalid address */
2620                         return (-1);
2621                 }
2622                 /* zero out the bzero area */
2623                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2624
2625                 /* assure len is set */
2626                 sin->sin_len = sizeof(struct sockaddr_in);
2627                 if (set_scope) {
2628 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2629                         stcb->ipv4_local_scope = 1;
2630 #else
2631                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2632                                 stcb->asoc.ipv4_local_scope = 1;
2633                         }
2634 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2635
2636                         if (sctp_is_address_on_local_host(newaddr)) {
2637                                 stcb->asoc.loopback_scope = 1;
2638                                 stcb->asoc.ipv4_local_scope = 1;
2639                                 stcb->asoc.local_scope = 1;
2640                                 stcb->asoc.site_scope = 1;
2641                         }
2642                 } else {
2643                         if (from == 8) {
2644                                 /* From connectx */
2645                                 if (sctp_is_address_on_local_host(newaddr)) {
2646                                         stcb->asoc.loopback_scope = 1;
2647                                         stcb->asoc.ipv4_local_scope = 1;
2648                                         stcb->asoc.local_scope = 1;
2649                                         stcb->asoc.site_scope = 1;
2650                                 }
2651                         }
2652                         /* Validate the address is in scope */
2653                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2654                             (stcb->asoc.ipv4_local_scope == 0)) {
2655                                 addr_inscope = 0;
2656                         }
2657                 }
2658         } else if (newaddr->sa_family == AF_INET6) {
2659                 struct sockaddr_in6 *sin6;
2660                 sin6 = (struct sockaddr_in6 *)newaddr;
2661                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2662                         /* Invalid address */
2663                         return (-1);
2664                 }
2665                 /* assure len is set */
2666                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2667                 if (set_scope) {
2668                         if (sctp_is_address_on_local_host(newaddr)) {
2669                                 stcb->asoc.loopback_scope = 1;
2670                                 stcb->asoc.local_scope = 1;
2671                                 stcb->asoc.ipv4_local_scope = 1;
2672                                 stcb->asoc.site_scope = 1;
2673                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2674                                 /*
2675                                  * If the new destination is a LINK_LOCAL
2676                                  * we must have common site scope. Don't set
2677                                  * the local scope since we may not share all
2678                                  * links, only loopback can do this.
2679                                  * Links on the local network would also
2680                                  * be on our private network for v4 too.
2681                                  */
2682                                 stcb->asoc.ipv4_local_scope = 1;
2683                                 stcb->asoc.site_scope = 1;
2684                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2685                                 /*
2686                                  * If the new destination is SITE_LOCAL
2687                                  * then we must have site scope in common.
2688                                  */
2689                                 stcb->asoc.site_scope = 1;
2690                         }
2691                 } else {
2692                         if (from == 8) {
2693                                 /* From connectx */
2694                                 if (sctp_is_address_on_local_host(newaddr)) {
2695                                         stcb->asoc.loopback_scope = 1;
2696                                         stcb->asoc.ipv4_local_scope = 1;
2697                                         stcb->asoc.local_scope = 1;
2698                                         stcb->asoc.site_scope = 1;
2699                                 }
2700                         }
2701                         /* Validate the address is in scope */
2702                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2703                             (stcb->asoc.loopback_scope == 0)) {
2704                                 addr_inscope = 0;
2705                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2706                                    (stcb->asoc.local_scope == 0)) {
2707                                 addr_inscope = 0;
2708                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2709                                    (stcb->asoc.site_scope == 0)) {
2710                                 addr_inscope = 0;
2711                         }
2712                 }
2713         } else {
2714                 /* not supported family type */
2715                 return (-1);
2716         }
2717         net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2718         if (net == NULL) {
2719                 return (-1);
2720         }
2721         sctppcbinfo.ipi_count_raddr++;
2722         sctppcbinfo.ipi_gencnt_raddr++;
2723         bzero(net, sizeof(*net));
2724         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2725         if (newaddr->sa_family == AF_INET) {
2726                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2727         } else if (newaddr->sa_family == AF_INET6) {
2728                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2729         }
2730         net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2731         net->failure_threshold = stcb->asoc.def_net_failure;
2732         if (addr_inscope == 0) {
2733 #ifdef SCTP_DEBUG
2734                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2735                         kprintf("Adding an address which is OUT OF SCOPE\n");
2736                 }
2737 #endif /* SCTP_DEBUG */
2738                 net->dest_state = (SCTP_ADDR_REACHABLE |
2739                     SCTP_ADDR_OUT_OF_SCOPE);
2740         } else {
2741                 if (from == 8)
2742                         /* 8 is passed by connect_x */
2743                         net->dest_state = SCTP_ADDR_REACHABLE;
2744                 else
2745                         net->dest_state = SCTP_ADDR_REACHABLE |
2746                             SCTP_ADDR_UNCONFIRMED;
2747         }
2748         net->RTO = stcb->asoc.initial_rto;
2749         stcb->asoc.numnets++;
2750         net->ref_count = 1;
2751
2752         /* Init the timer structure */
2753 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2754         callout_init(&net->rxt_timer.timer, 0);
2755         callout_init(&net->pmtu_timer.timer, 0);
2756 #else
2757         callout_init(&net->rxt_timer.timer);
2758         callout_init(&net->pmtu_timer.timer);
2759 #endif
2760
2761         /* Now generate a route for this guy */
2762         /* KAME hack: embed scopeid */
2763         if (newaddr->sa_family == AF_INET6) {
2764                 struct sockaddr_in6 *sin6;
2765                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2766 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2767                 in6_embedscope(&sin6->sin6_addr, sin6,
2768                     &stcb->sctp_ep->ip_inp.inp, NULL);
2769 #else
2770                 in6_embedscope(&sin6->sin6_addr, sin6);
2771 #endif
2772 #ifndef SCOPEDROUTING
2773                 sin6->sin6_scope_id = 0;
2774 #endif
2775         }
2776 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2777         rtalloc_ign((struct route *)&net->ro, 0UL);
2778 #else
2779         rtalloc((struct route *)&net->ro);
2780 #endif
2781         if (newaddr->sa_family == AF_INET6) {
2782                 struct sockaddr_in6 *sin6;
2783                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2784                 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2785         }
2786         if ((net->ro.ro_rt) &&
2787             (net->ro.ro_rt->rt_ifp)) {
2788                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2789                 if (from == 1) {
2790                         stcb->asoc.smallest_mtu = net->mtu;
2791                 }
2792                 /* start things off to match mtu of interface please. */
2793                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2794         } else {
2795                 net->mtu = stcb->asoc.smallest_mtu;
2796         }
2797         if (stcb->asoc.smallest_mtu > net->mtu) {
2798                 stcb->asoc.smallest_mtu = net->mtu;
2799         }
2800         /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2801          * We then limit this to 4 MTU's of sending.
2802          */
2803         net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2804
2805         /* we always get at LEAST 2 MTU's */
2806         if (net->cwnd < (2 * net->mtu)) {
2807                 net->cwnd = 2 * net->mtu;
2808         }
2809
2810         net->ssthresh = stcb->asoc.peers_rwnd;
2811
2812         net->src_addr_selected = 0;
2813         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2814         if (net->ro.ro_rt == NULL) {
2815                 /* Since we have no route put it at the back */
2816                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2817         } else if (netfirst == NULL) {
2818                 /* We are the first one in the pool. */
2819                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2820         } else if (netfirst->ro.ro_rt == NULL) {
2821                 /*
2822                  * First one has NO route. Place this one ahead of the
2823                  * first one.
2824                  */
2825                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2826         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2827                 /*
2828                  * This one has a different interface than the one at the
2829                  * top of the list. Place it ahead.
2830                  */
2831                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2832         } else {
2833                 /*
2834                  * Ok we have the same interface as the first one. Move
2835                  * forward until we find either
2836                  *   a) one with a NULL route... insert ahead of that
2837                  *   b) one with a different ifp.. insert after that.
2838                  *   c) end of the list.. insert at the tail.
2839                  */
2840                 struct sctp_nets *netlook;
2841                 do {
2842                         netlook = TAILQ_NEXT(netfirst, sctp_next);
2843                         if (netlook == NULL) {
2844                                 /* End of the list */
2845                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2846                                     sctp_next);
2847                                 break;
2848                         } else if (netlook->ro.ro_rt == NULL) {
2849                                 /* next one has NO route */
2850                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2851                                 break;
2852                         } else if (netlook->ro.ro_rt->rt_ifp !=
2853                                    net->ro.ro_rt->rt_ifp) {
2854                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2855                                     net, sctp_next);
2856                                 break;
2857                         }
2858                         /* Shift forward */
2859                         netfirst = netlook;
2860                 } while (netlook != NULL);
2861         }
2862         /* got to have a primary set */
2863         if (stcb->asoc.primary_destination == 0) {
2864                 stcb->asoc.primary_destination = net;
2865         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2866                    (net->ro.ro_rt)) {
2867                 /* No route to current primary adopt new primary */
2868                 stcb->asoc.primary_destination = net;
2869         }
2870         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2871             net);
2872
2873         return (0);
2874 }
2875
2876
2877 /*
2878  * allocate an association and add it to the endpoint. The caller must
2879  * be careful to add all additional addresses once they are know right
2880  * away or else the assoc will be may experience a blackout scenario.
2881  */
2882 struct sctp_tcb *
2883 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2884     int for_a_init, int *error,  uint32_t override_tag)
2885 {
2886         struct sctp_tcb *stcb;
2887         struct sctp_association *asoc;
2888         struct sctpasochead *head;
2889         uint16_t rport;
2890         int err;
2891
2892         /*
2893          * Assumption made here:
2894          *  Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2895          *  to make sure the address does not exist already.
2896          */
2897         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2898                 /* Hit max assoc, sorry no more */
2899                 *error = ENOBUFS;
2900                 return (NULL);
2901         }
2902         SCTP_INP_RLOCK(inp);
2903         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2904                 /*
2905                  * If its in the TCP pool, its NOT allowed to create an
2906                  * association. The parent listener needs to call
2907                  * sctp_aloc_assoc.. or the one-2-many socket. If a
2908                  * peeled off, or connected one does this.. its an error.
2909                  */
2910                 SCTP_INP_RUNLOCK(inp);
2911                 *error = EINVAL;
2912                 return (NULL);
2913         }
2914
2915 #ifdef SCTP_DEBUG
2916         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2917                 kprintf("Allocate an association for peer:");
2918                 if (firstaddr)
2919                         sctp_print_address(firstaddr);
2920                 else
2921                         kprintf("None\n");
2922                 kprintf("Port:%d\n",
2923                        ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2924         }
2925 #endif /* SCTP_DEBUG */
2926         if (firstaddr->sa_family == AF_INET) {
2927                 struct sockaddr_in *sin;
2928                 sin = (struct sockaddr_in *)firstaddr;
2929                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2930                         /* Invalid address */
2931 #ifdef SCTP_DEBUG
2932                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2933                                 kprintf("peer address invalid\n");
2934                         }
2935 #endif
2936                         SCTP_INP_RUNLOCK(inp);
2937                         *error = EINVAL;
2938                         return (NULL);
2939                 }
2940                 rport = sin->sin_port;
2941         } else if (firstaddr->sa_family == AF_INET6) {
2942                 struct sockaddr_in6 *sin6;
2943                 sin6 = (struct sockaddr_in6 *)firstaddr;
2944                 if ((sin6->sin6_port == 0) ||
2945                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2946                         /* Invalid address */
2947 #ifdef SCTP_DEBUG
2948                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2949                                 kprintf("peer address invalid\n");
2950                         }
2951 #endif
2952                         SCTP_INP_RUNLOCK(inp);
2953                         *error = EINVAL;
2954                         return (NULL);
2955                 }
2956                 rport = sin6->sin6_port;
2957         } else {
2958                 /* not supported family type */
2959 #ifdef SCTP_DEBUG
2960                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2961                         kprintf("BAD family %d\n", firstaddr->sa_family);
2962                 }
2963 #endif
2964                 SCTP_INP_RUNLOCK(inp);
2965                 *error = EINVAL;
2966                 return (NULL);
2967         }
2968         SCTP_INP_RUNLOCK(inp);
2969         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2970                 /*
2971                  * If you have not performed a bind, then we need to do
2972                  * the ephemerial bind for you.
2973                  */
2974 #ifdef SCTP_DEBUG
2975                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2976                         kprintf("Doing implicit BIND\n");
2977                 }
2978 #endif
2979
2980                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2981                     NULL,
2982 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2983                                            NULL
2984 #else
2985                                            NULL
2986 #endif
2987                              ))){
2988                         /* bind error, probably perm */
2989 #ifdef SCTP_DEBUG
2990                         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2991                                 kprintf("BIND FAILS ret:%d\n", err);
2992                         }
2993 #endif
2994
2995                         *error = err;
2996                         return (NULL);
2997                 }
2998         }
2999         stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3000         if (stcb == NULL) {
3001                 /* out of memory? */
3002 #ifdef SCTP_DEBUG
3003                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3004                         kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3005                 }
3006 #endif
3007                 *error = ENOMEM;
3008                 return (NULL);
3009         }
3010         sctppcbinfo.ipi_count_asoc++;
3011         sctppcbinfo.ipi_gencnt_asoc++;
3012
3013         bzero(stcb, sizeof(*stcb));
3014         asoc = &stcb->asoc;
3015         SCTP_TCB_LOCK_INIT(stcb);
3016         /* setup back pointer's */
3017         stcb->sctp_ep = inp;
3018         stcb->sctp_socket = inp->sctp_socket;
3019         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3020                 /* failed */
3021                 SCTP_TCB_LOCK_DESTROY (stcb);
3022                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3023                 sctppcbinfo.ipi_count_asoc--;
3024 #ifdef SCTP_DEBUG
3025                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3026                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3027                 }
3028 #endif
3029                 *error = err;
3030                 return (NULL);
3031         }
3032         /* and the port */
3033         stcb->rport = rport;
3034         SCTP_INP_INFO_WLOCK();
3035         SCTP_INP_WLOCK(inp);
3036         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3037                 /* inpcb freed while alloc going on */
3038                 SCTP_TCB_LOCK_DESTROY (stcb);
3039                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3040                 SCTP_INP_WUNLOCK(inp);
3041                 SCTP_INP_INFO_WUNLOCK();
3042                 sctppcbinfo.ipi_count_asoc--;
3043 #ifdef SCTP_DEBUG
3044                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3045                         kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3046                 }
3047 #endif
3048                 *error = EINVAL;
3049                 return (NULL);
3050         }
3051         SCTP_TCB_LOCK(stcb);
3052
3053         /* now that my_vtag is set, add it to the  hash */
3054         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3055              sctppcbinfo.hashasocmark)];
3056         /* put it in the bucket in the vtag hash of assoc's for the system */
3057         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3058         SCTP_INP_INFO_WUNLOCK();
3059
3060
3061         if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3062                 /* failure.. memory error? */
3063                 if (asoc->strmout)
3064                         kfree(asoc->strmout, M_PCB);
3065                 if (asoc->mapping_array)
3066                         kfree(asoc->mapping_array, M_PCB);
3067
3068                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3069                 sctppcbinfo.ipi_count_asoc--;
3070 #ifdef SCTP_DEBUG
3071                 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3072                         kprintf("aloc_assoc: couldn't add remote addr!\n");
3073                 }
3074 #endif
3075                 SCTP_TCB_LOCK_DESTROY (stcb);
3076                 *error = ENOBUFS;
3077                 return (NULL);
3078         }
3079         /* Init all the timers */
3080 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3081         callout_init(&asoc->hb_timer.timer, 0);
3082         callout_init(&asoc->dack_timer.timer, 0);
3083         callout_init(&asoc->asconf_timer.timer, 0);
3084         callout_init(&asoc->shut_guard_timer.timer, 0);
3085         callout_init(&asoc->autoclose_timer.timer, 0);
3086         callout_init(&asoc->delayed_event_timer.timer, 0);
3087 #else
3088         callout_init(&asoc->hb_timer.timer);
3089         callout_init(&asoc->dack_timer.timer);
3090         callout_init(&asoc->asconf_timer.timer);
3091         callout_init(&asoc->shut_guard_timer.timer);
3092         callout_init(&asoc->autoclose_timer.timer);
3093         callout_init(&asoc->delayed_event_timer.timer);
3094 #endif
3095         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3096         /* now file the port under the hash as well */
3097         if (inp->sctp_tcbhash != NULL) {
3098                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3099                    inp->sctp_hashmark)];
3100                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3101         }
3102         SCTP_INP_WUNLOCK(inp);
3103 #ifdef SCTP_DEBUG
3104         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3105                 kprintf("Association %p now allocated\n", stcb);
3106         }
3107 #endif
3108         return (stcb);
3109 }
3110
3111 void
3112 sctp_free_remote_addr(struct sctp_nets *net)
3113 {
3114         if (net == NULL)
3115                 return;
3116         net->ref_count--;
3117         if (net->ref_count <= 0) {
3118                 /* stop timer if running */
3119                 callout_stop(&net->rxt_timer.timer);
3120                 callout_stop(&net->pmtu_timer.timer);
3121                 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3122                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3123                 sctppcbinfo.ipi_count_raddr--;
3124         }
3125 }
3126
3127 /*
3128  * remove a remote endpoint address from an association, it
3129  * will fail if the address does not exist.
3130  */
3131 int
3132 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3133 {
3134         /*
3135          * Here we need to remove a remote address. This is quite simple, we
3136          * first find it in the list of address for the association
3137          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3138          * that item.
3139          * Note we do not allow it to be removed if there are no other
3140          * addresses.
3141          */
3142         struct sctp_association *asoc;
3143         struct sctp_nets *net, *net_tmp;
3144         asoc = &stcb->asoc;
3145         if (asoc->numnets < 2) {
3146                 /* Must have at LEAST two remote addresses */
3147                 return (-1);
3148         }
3149         /* locate the address */
3150         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3151                 net_tmp = TAILQ_NEXT(net, sctp_next);
3152                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3153                         continue;
3154                 }
3155                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3156                     remaddr)) {
3157                         /* we found the guy */
3158                         asoc->numnets--;
3159                         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3160                         sctp_free_remote_addr(net);
3161                         if (net == asoc->primary_destination) {
3162                                 /* Reset primary */
3163                                 struct sctp_nets *lnet;
3164                                 lnet = TAILQ_FIRST(&asoc->nets);
3165                                 /* Try to find a confirmed primary */
3166                                 asoc->primary_destination =
3167                                     sctp_find_alternate_net(stcb, lnet);
3168                         }
3169                         if (net == asoc->last_data_chunk_from) {
3170                                 /* Reset primary */
3171                                 asoc->last_data_chunk_from =
3172                                     TAILQ_FIRST(&asoc->nets);
3173                         }
3174                         if (net == asoc->last_control_chunk_from) {
3175                                 /* Reset primary */
3176                                 asoc->last_control_chunk_from =
3177                                     TAILQ_FIRST(&asoc->nets);
3178                         }
3179                         if (net == asoc->asconf_last_sent_to) {
3180                                 /* Reset primary */
3181                                 asoc->asconf_last_sent_to =
3182                                     TAILQ_FIRST(&asoc->nets);
3183                         }
3184                         return (0);
3185                 }
3186         }
3187         /* not found. */
3188         return (-2);
3189 }
3190
3191
3192 static void
3193 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3194 {
3195         struct sctpvtaghead *chain;
3196         struct sctp_tagblock *twait_block;
3197         struct timeval now;
3198         int set, i;
3199         SCTP_GETTIME_TIMEVAL(&now);
3200         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3201         set = 0;
3202         if (!LIST_EMPTY(chain)) {
3203                 /* Block(s) present, lets find space, and expire on the fly */
3204                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3205                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3206                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3207                                     !set) {
3208                                         twait_block->vtag_block[0].tv_sec_at_expire =
3209                                             now.tv_sec + SCTP_TIME_WAIT;
3210                                         twait_block->vtag_block[0].v_tag = tag;
3211                                         set = 1;
3212                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3213                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3214                                     now.tv_sec)) {
3215                                         /* Audit expires this guy */
3216                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3217                                         twait_block->vtag_block[i].v_tag = 0;
3218                                         if (set == 0) {
3219                                                 /* Reuse it for my new tag */
3220                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3221                                                 twait_block->vtag_block[0].v_tag = tag;
3222                                                 set = 1;
3223                                         }
3224                                 }
3225                         }
3226                         if (set) {
3227                                 /*
3228                                  * We only do up to the block where we can
3229                                  * place our tag for audits
3230                                  */
3231                                 break;
3232                         }
3233                 }
3234         }
3235         /* Need to add a new block to chain */
3236         if (!set) {
3237                 twait_block = kmalloc(sizeof(struct sctp_tagblock), M_PCB,
3238                                       M_NOWAIT);
3239                 if (twait_block == NULL) {
3240                         return;
3241                 }
3242                 memset(twait_block, 0, sizeof(struct sctp_timewait));
3243                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3244                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3245                     SCTP_TIME_WAIT;
3246                 twait_block->vtag_block[0].v_tag = tag;
3247         }
3248 }
3249
3250
3251 static void
3252 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3253 {
3254         struct sctp_iterator *it;
3255
3256
3257
3258         /* Unlock the tcb lock we do this so
3259          * we avoid a dead lock scenario where
3260          * the iterator is waiting on the TCB lock
3261          * and the TCB lock is waiting on the iterator
3262          * lock.
3263          */
3264         SCTP_ITERATOR_LOCK();
3265         SCTP_INP_INFO_WLOCK();
3266         SCTP_INP_WLOCK(inp);
3267         SCTP_TCB_LOCK(stcb);
3268
3269         it = stcb->asoc.stcb_starting_point_for_iterator;
3270         if (it == NULL) {
3271                 return;
3272         }
3273         if (it->inp != stcb->sctp_ep) {
3274                 /* hm, focused on the wrong one? */
3275                 return;
3276         }
3277         if (it->stcb != stcb) {
3278                 return;
3279         }
3280         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3281         if (it->stcb == NULL) {
3282                 /* done with all asoc's in this assoc */
3283                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3284                         it->inp = NULL;
3285                 } else {
3286
3287                         it->inp = LIST_NEXT(inp, sctp_list);
3288                 }
3289         }
3290 }
3291
3292 /*
3293  * Free the association after un-hashing the remote port.
3294  */
3295 void
3296 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3297 {
3298         struct sctp_association *asoc;
3299         struct sctp_nets *net, *prev;
3300         struct sctp_laddr *laddr;
3301         struct sctp_tmit_chunk *chk;
3302         struct sctp_asconf_addr *aparam;
3303         struct sctp_socket_q_list *sq;
3304
3305         /* first, lets purge the entry from the hash table. */
3306         if (stcb->asoc.state == 0) {
3307                 kprintf("Freeing already free association:%p - huh??\n",
3308                     stcb);
3309                 return;
3310         }
3311         asoc = &stcb->asoc;
3312         asoc->state = 0;
3313         /* now clean up any other timers */
3314         callout_stop(&asoc->hb_timer.timer);
3315         callout_stop(&asoc->dack_timer.timer);
3316         callout_stop(&asoc->asconf_timer.timer);
3317         callout_stop(&asoc->shut_guard_timer.timer);
3318         callout_stop(&asoc->autoclose_timer.timer);
3319         callout_stop(&asoc->delayed_event_timer.timer);
3320         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3321                 callout_stop(&net->rxt_timer.timer);
3322                 callout_stop(&net->pmtu_timer.timer);
3323         }
3324
3325         /* Iterator asoc being freed we send an
3326          * unlocked TCB. It returns with INP_INFO
3327          * and INP write locked and the TCB locked
3328          * too and of course the iterator lock
3329          * in place as well..
3330          */
3331         SCTP_TCB_UNLOCK(stcb);
3332         sctp_iterator_asoc_being_freed(inp, stcb);
3333
3334         /* Null all of my entry's on the socket q */
3335         TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3336                 if (sq->tcb == stcb) {
3337                         sq->tcb = NULL;
3338                 }
3339         }
3340
3341         if (inp->sctp_tcb_at_block == (void *)stcb) {
3342                 inp->error_on_block = ECONNRESET;
3343         }
3344
3345         if (inp->sctp_tcbhash) {
3346                 LIST_REMOVE(stcb, sctp_tcbhash);
3347         }
3348         /* Now lets remove it from the list of ALL associations in the EP */
3349         LIST_REMOVE(stcb, sctp_tcblist);
3350         SCTP_INP_WUNLOCK(inp);
3351         SCTP_ITERATOR_UNLOCK();
3352
3353
3354         /* pull from vtag hash */
3355         LIST_REMOVE(stcb, sctp_asocs);
3356
3357         /*
3358          * Now before we can free the assoc, we must  remove all of the
3359          * networks and any other allocated space.. i.e. add removes here
3360          * before the SCTP_ZONE_FREE() of the tasoc entry.
3361          */
3362
3363         sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3364         SCTP_INP_INFO_WUNLOCK();
3365         prev = NULL;
3366         while (!TAILQ_EMPTY(&asoc->nets)) {
3367                 net = TAILQ_FIRST(&asoc->nets);
3368                 /* pull from list */
3369                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3370                         break;
3371                 }
3372                 prev = net;
3373                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3374                 /* free it */
3375                 net->ref_count = 0;
3376                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3377                 sctppcbinfo.ipi_count_raddr--;
3378         }
3379         /*
3380          * The chunk lists and such SHOULD be empty but we check them
3381          * just in case.
3382          */
3383         /* anything on the wheel needs to be removed */
3384         while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3385                 struct sctp_stream_out *outs;
3386                 outs = TAILQ_FIRST(&asoc->out_wheel);
3387                 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3388                 /* now clean up any chunks here */
3389                 chk = TAILQ_FIRST(&outs->outqueue);
3390                 while (chk) {
3391                         TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3392                         if (chk->data) {
3393                                 sctp_m_freem(chk->data);
3394                                 chk->data = NULL;
3395                         }
3396                         chk->whoTo = NULL;
3397                         chk->asoc = NULL;
3398                         /* Free the chunk */
3399                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3400                         sctppcbinfo.ipi_count_chunk--;
3401                         sctppcbinfo.ipi_gencnt_chunk++;
3402                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3403                                 panic("Chunk count is negative");
3404                         }
3405                         chk = TAILQ_FIRST(&outs->outqueue);
3406                 }
3407                 outs = TAILQ_FIRST(&asoc->out_wheel);
3408         }
3409
3410         if (asoc->pending_reply) {
3411                 kfree(asoc->pending_reply, M_PCB);
3412                 asoc->pending_reply = NULL;
3413         }
3414         chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3415         while (chk) {
3416                 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3417                 if (chk->data) {
3418                         sctp_m_freem(chk->data);
3419                         chk->data = NULL;
3420                 }
3421                 chk->whoTo = NULL;
3422                 chk->asoc = NULL;
3423                 /* Free the chunk */
3424                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3425                 sctppcbinfo.ipi_count_chunk--;
3426                 sctppcbinfo.ipi_gencnt_chunk++;
3427                 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3428                         panic("Chunk count is negative");
3429                 }
3430                 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3431         }
3432         /* pending send queue SHOULD be empty */
3433         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3434                 chk = TAILQ_FIRST(&asoc->send_queue);
3435                 while (chk) {
3436                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3437                         if (chk->data) {
3438                                 sctp_m_freem(chk->data);
3439                                 chk->data = NULL;
3440                         }
3441                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3442                         sctppcbinfo.ipi_count_chunk--;
3443                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3444                                 panic("Chunk count is negative");
3445                         }
3446                         sctppcbinfo.ipi_gencnt_chunk++;
3447                         chk = TAILQ_FIRST(&asoc->send_queue);
3448                 }
3449         }
3450         /* sent queue SHOULD be empty */
3451         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3452                 chk = TAILQ_FIRST(&asoc->sent_queue);
3453                 while (chk) {
3454                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3455                         if (chk->data) {
3456                                 sctp_m_freem(chk->data);
3457                                 chk->data = NULL;
3458                         }
3459                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3460                         sctppcbinfo.ipi_count_chunk--;
3461                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3462                                 panic("Chunk count is negative");
3463                         }
3464                         sctppcbinfo.ipi_gencnt_chunk++;
3465                         chk = TAILQ_FIRST(&asoc->sent_queue);
3466                 }
3467         }
3468         /* control queue MAY not be empty */
3469         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3470                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3471                 while (chk) {
3472                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3473                         if (chk->data) {
3474                                 sctp_m_freem(chk->data);
3475                                 chk->data = NULL;
3476                         }
3477                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3478                         sctppcbinfo.ipi_count_chunk--;
3479                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3480                                 panic("Chunk count is negative");
3481                         }
3482                         sctppcbinfo.ipi_gencnt_chunk++;
3483                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3484                 }
3485         }
3486         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3487                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3488                 while (chk) {
3489                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3490                         if (chk->data) {
3491                                 sctp_m_freem(chk->data);
3492                                 chk->data = NULL;
3493                         }
3494                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3495                         sctppcbinfo.ipi_count_chunk--;
3496                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3497                                 panic("Chunk count is negative");
3498                         }
3499                         sctppcbinfo.ipi_gencnt_chunk++;
3500                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3501                 }
3502         }
3503         if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3504                 chk = TAILQ_FIRST(&asoc->delivery_queue);
3505                 while (chk) {
3506                         TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3507                         if (chk->data) {
3508                                 sctp_m_freem(chk->data);
3509                                 chk->data = NULL;
3510                         }
3511                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3512                         sctppcbinfo.ipi_count_chunk--;
3513                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3514                                 panic("Chunk count is negative");
3515                         }
3516                         sctppcbinfo.ipi_gencnt_chunk++;
3517                         chk = TAILQ_FIRST(&asoc->delivery_queue);
3518                 }
3519         }
3520         if (asoc->mapping_array) {
3521                 kfree(asoc->mapping_array, M_PCB);
3522                 asoc->mapping_array = NULL;
3523         }
3524
3525         /* the stream outs */
3526         if (asoc->strmout) {
3527                 kfree(asoc->strmout, M_PCB);
3528                 asoc->strmout = NULL;
3529         }
3530         asoc->streamoutcnt = 0;
3531         if (asoc->strmin) {
3532                 int i;
3533                 for (i = 0; i < asoc->streamincnt; i++) {
3534                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3535                                 /* We have somethings on the streamin queue */
3536                                 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3537                                 while (chk) {
3538                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3539                                             chk, sctp_next);
3540                                         if (chk->data) {
3541                                                 sctp_m_freem(chk->data);
3542                                                 chk->data = NULL;
3543                                         }
3544                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3545                                             chk);
3546                                         sctppcbinfo.ipi_count_chunk--;
3547                                         if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3548                                                 panic("Chunk count is negative");
3549                                         }
3550                                         sctppcbinfo.ipi_gencnt_chunk++;
3551                                         chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3552                                 }
3553                         }
3554                 }
3555                 kfree(asoc->strmin, M_PCB);
3556                 asoc->strmin = NULL;
3557         }
3558         asoc->streamincnt = 0;
3559         /* local addresses, if any */
3560         while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3561                 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3562                 LIST_REMOVE(laddr, sctp_nxt_addr);
3563                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3564                 sctppcbinfo.ipi_count_laddr--;
3565         }
3566         /* pending asconf (address) parameters */
3567         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3568                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3569                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3570                 kfree(aparam, M_PCB);
3571         }
3572         if (asoc->last_asconf_ack_sent != NULL) {
3573                 sctp_m_freem(asoc->last_asconf_ack_sent);
3574                 asoc->last_asconf_ack_sent = NULL;
3575         }
3576         /* Insert new items here :> */
3577
3578         /* Get rid of LOCK */
3579         SCTP_TCB_LOCK_DESTROY(stcb);
3580
3581         /* now clean up the tasoc itself */
3582         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3583         sctppcbinfo.ipi_count_asoc--;
3584         if ((inp->sctp_socket->so_snd.ssb_cc) ||
3585             (inp->sctp_socket->so_snd.ssb_mbcnt)) {
3586                 /* This will happen when a abort is done */
3587                 inp->sctp_socket->so_snd.ssb_cc = 0;
3588                 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
3589         }
3590         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3591                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3592                         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3593                                 /*
3594                                  * For the base fd, that is NOT in TCP pool we
3595                                  * turn off the connected flag. This allows
3596                                  * non-listening endpoints to connect/shutdown/
3597                                  * connect.
3598                                  */
3599                                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3600                                 soisdisconnected(inp->sctp_socket);
3601                         }
3602                         /*
3603                          * For those that are in the TCP pool we just leave
3604                          * so it cannot be used. When they close the fd we
3605                          * will free it all.
3606                          */