kernel/netinet: Remove some unused variables.
[dragonfly.git] / sys / netinet / sctp_pcb.c
CommitLineData
8d60bf8a 1/* $KAME: sctp_pcb.c,v 1.37 2004/08/17 06:28:02 t-momose Exp $ */
8d60bf8a
EN
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
8e062f96 37#if defined(__FreeBSD__) || defined(__DragonFly__)
8d60bf8a
EN
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>
895c1f85 60#include <sys/priv.h>
8d60bf8a
EN
61#include <sys/kernel.h>
62#include <sys/sysctl.h>
66a25ac4 63#include <sys/thread2.h>
8e062f96 64#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
8d60bf8a
EN
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>
8e062f96 103#if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
8d60bf8a
EN
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>
7f12b1a3 113#include <netproto/key/key.h>
8d60bf8a
EN
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
134u_int32_t sctp_debug_on = 0;
135#endif /* SCTP_DEBUG */
136
137u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
138
139int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
140
141struct sctp_epinfo sctppcbinfo;
142
143/* FIX: we don't handle multiple link local scopes */
144/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
145int
146SCTP6_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__
158extern int ipport_firstauto;
159extern int ipport_lastauto;
160extern int ipport_hifirstauto;
161extern int ipport_hilastauto;
162#endif
163
164#if defined(__FreeBSD__) && __FreeBSD_version > 500000
165
166#ifndef xyzzy
167void sctp_validate_no_locks(void);
168
169void
170SCTP_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
182void
183SCTP_INP_WLOCK(struct sctp_inpcb *inp)
184{
185 SCTP_INP_RLOCK(inp);
186}
187
188void
f3f70f0d 189SCTP_INP_INFO_RLOCK(void)
8d60bf8a
EN
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
206void
f3f70f0d 207SCTP_INP_INFO_WLOCK(void)
8d60bf8a
EN
208{
209 SCTP_INP_INFO_RLOCK();
210}
211
212
f3f70f0d 213void sctp_validate_no_locks(void)
8d60bf8a
EN
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
234void
235sctp_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 */
269static struct sctp_tcb *
270sctp_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) {
a6ec04bc 330 kprintf("An ounce of prevention is worth a pound of cure\n");
8d60bf8a
EN
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) {
a6ec04bc 338 kprintf("ifa with a NULL address\n");
8d60bf8a
EN
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
442struct sctp_tcb *
443sctp_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) {
a6ec04bc 484 kprintf("sctp_process_control: failed to get asconf lookup addr\n");
8d60bf8a
EN
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) {
a6ec04bc 504 kprintf("sctp_process_control: failed to get asconf v6 lookup addr\n");
8d60bf8a
EN
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) {
a6ec04bc 527 kprintf("sctp_process_control: failed to get asconf v4 lookup addr\n");
8d60bf8a
EN
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
548struct sctp_tcb *
549sctp_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 */
739struct sctp_tcb *
740sctp_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();
5cb979b9 753 vtag = (u_int32_t)(uintptr_t)asoc_id;
8d60bf8a
EN
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
785static struct sctp_inpcb *
786sctp_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) &&
8e062f96 818#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
8d60bf8a
EN
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) {
a6ec04bc 859 kprintf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
8d60bf8a
EN
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) {
d662f93c 878 kprintf("Ok, found matching local port\n");
8d60bf8a
EN
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) {
a6ec04bc 885 kprintf("An ounce of prevention is worth a pound of cure\n");
8d60bf8a
EN
886 }
887#endif
888 continue;
889 }
890#ifdef SCTP_DEBUG
891 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
a6ec04bc 892 kprintf("Ok laddr->ifa:%p is possible, ",
8d60bf8a
EN
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) {
a6ec04bc 899 kprintf("Huh IFA as an ifa_addr=NULL, ");
8d60bf8a
EN
900 }
901#endif
902 continue;
903 }
904#ifdef SCTP_DEBUG
905 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
a6ec04bc 906 kprintf("Ok laddr->ifa:%p is possible, ",
8d60bf8a
EN
907 laddr->ifa->ifa_addr);
908 sctp_print_address(laddr->ifa->ifa_addr);
a6ec04bc 909 kprintf("looking for ");
8d60bf8a
EN
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) {
a6ec04bc 923 kprintf("YES, return ep:%p\n", inp);
8d60bf8a
EN
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) {
a6ec04bc 937 kprintf("YES, return ep:%p\n", inp);
8d60bf8a
EN
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) {
a6ec04bc 950 kprintf("NO, Falls out to NULL\n");
8d60bf8a
EN
951 }
952#endif
953 return (NULL);
954}
955
956
957struct sctp_inpcb *
958sctp_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;
8d60bf8a
EN
966 int lport;
967#ifdef SCTP_DEBUG
968 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
a6ec04bc 969 kprintf("Looking for endpoint %d :",
8d60bf8a
EN
970 ntohs(((struct sockaddr_in *)nam)->sin_port));
971 sctp_print_address(nam);
972 }
973#endif
974 if (nam->sa_family == AF_INET) {
8d60bf8a
EN
975 lport = ((struct sockaddr_in *)nam)->sin_port;
976 } else if (nam->sa_family == AF_INET6) {
8d60bf8a
EN
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) {
a6ec04bc 994 kprintf("Main hash to lookup at head:%p\n", head);
8d60bf8a
EN
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) {
a6ec04bc 1010 kprintf("EP was NULL and TCP model is supported\n");
8d60bf8a
EN
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) {
a6ec04bc 1032 kprintf("EP to return is %p\n", inp);
8d60bf8a
EN
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 */
1057struct sctp_tcb *
1058sctp_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 */
1105static struct sctp_tcb *
1106sctp_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) {
a6ec04bc 1136 kprintf("sctp_findassociation_special_addr: Impossible length in parameter\n");
8d60bf8a
EN
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
1185static struct sctp_tcb *
1186sctp_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 */
1254struct sctp_tcb *
1255sctp_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 */
f3f70f0d 1300 in6_recoverscope(to6, &to6->sin6_addr, NULL);
8e062f96 1301#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
f3f70f0d 1302 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
8d60bf8a 1303#else
f3f70f0d 1304 in6_embedscope(&to6->sin6_addr, to6);
8d60bf8a
EN
1305#endif
1306
f3f70f0d 1307 in6_recoverscope(from6, &from6->sin6_addr, NULL);
8e062f96 1308#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
f3f70f0d 1309 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
8d60bf8a 1310#else
f3f70f0d 1311 in6_embedscope(&from6->sin6_addr, from6);
8d60bf8a
EN
1312#endif
1313 } else {
1314 /* Currently not supported. */
1315 return (NULL);
1316 }
1317#ifdef SCTP_DEBUG
1318 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
a6ec04bc 1319 kprintf("Looking for port %d address :",
8d60bf8a
EN
1320 ntohs(((struct sockaddr_in *)to)->sin_port));
1321 sctp_print_address(to);
a6ec04bc 1322 kprintf("From for port %d address :",
8d60bf8a
EN
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) {
a6ec04bc 1354 kprintf("retval:%p inp:%p\n", retval, inp);
8d60bf8a
EN
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) {
a6ec04bc 1361 kprintf("Found endpoint %p but no asoc - ep state:%x\n",
8d60bf8a
EN
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) {
a6ec04bc 1378 kprintf("Gak, its in the TCP pool... return NULL");
8d60bf8a
EN
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) {
a6ec04bc 1388 kprintf("Now doing SPECIAL find\n");
8d60bf8a
EN
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) {
a6ec04bc 1397 kprintf("retval is %p\n", retval);
8d60bf8a
EN
1398 }
1399#endif
1400 return (retval);
1401}
1402
1403extern int sctp_max_burst_default;
1404
1405extern unsigned int sctp_delayed_sack_time_default;
1406extern unsigned int sctp_heartbeat_interval_default;
1407extern unsigned int sctp_pmtu_raise_time_default;
1408extern unsigned int sctp_shutdown_guard_time_default;
1409extern unsigned int sctp_secret_lifetime_default;
1410
1411extern unsigned int sctp_rto_max_default;
1412extern unsigned int sctp_rto_min_default;
1413extern unsigned int sctp_rto_initial_default;
1414extern unsigned int sctp_init_rto_max_default;
1415extern unsigned int sctp_valid_cookie_life_default;
1416extern unsigned int sctp_init_rtx_max_default;
1417extern unsigned int sctp_assoc_rtx_max_default;
1418extern unsigned int sctp_path_rtx_max_default;
1419extern 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 */
1426int
1427sctp_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 */
a6ec04bc 1466 kprintf("Found a GONE on list\n");
8d60bf8a
EN
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) {
a6ec04bc 1480 kprintf("Out of SCTP-INPCB structures - no resources\n");
8d60bf8a
EN
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;
7f12b1a3 1501 error = ipsec_init_policy(so, &pcb_sp);
8d60bf8a
EN
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++;
8e062f96 1517#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
8d60bf8a
EN
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);
8d60bf8a
EN
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);
8d60bf8a
EN
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) {
a6ec04bc 1557 kprintf("Out of SCTP-INPCB->hashinit - no resources\n");
8d60bf8a
EN
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;
8e062f96 1617#if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
8d60bf8a
EN
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
1664void
1665sctp_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) {
e46d128d
SW
1712 hashdestroy(new_inp->sctp_tcbhash, M_PCB,
1713 new_inp->sctp_hashmark);
8d60bf8a
EN
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) {
a6ec04bc 1729 kprintf("Association hosed in TCP model, out of laddr memory\n");
8d60bf8a
EN
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
1747static int
1748sctp_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
8e062f96 1805#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
1806/*
1807 * Don't know why, but without this there is an unknown reference when
1808 * compiling NetBSD... hmm
1809 */
1810extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1811#endif
1812
1813
1814int
8e062f96 1815#if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
8d60bf8a
EN
1816sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1817#else
1818sctp_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) {
a6ec04bc 1837 kprintf("Bind called port:%d\n",
8d60bf8a 1838 ntohs(((struct sockaddr_in *)addr)->sin_port));
a6ec04bc 1839 kprintf("Addr :");
8d60bf8a
EN
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 (
8e062f96 1855#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
8d60bf8a
EN
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 */
8e062f96 1890#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
8d60bf8a
EN
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)
804ef527 1932#elif defined(__DragonFly__)
895c1f85 1933 priv_check(p, PRIV_ROOT)
8d60bf8a
EN
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) {
a6ec04bc 2146 kprintf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
8d60bf8a
EN
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
2160static void
2161sctp_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;
8f706258 2180 if (it->inp == inp) {
8d60bf8a
EN
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 */
2210void
2211sctp_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 */
8d60bf8a
EN
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
66a25ac4 2233 int cnt;
8d60bf8a 2234
8d60bf8a
EN
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 */
a6ec04bc 2240 kprintf("Endpoint was all gone (dup free)?\n");
8d60bf8a
EN
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;
8d60bf8a
EN
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) ||
6d49aa6f 2281 (so && (so->so_rcv.ssb_cc > 0))
8d60bf8a
EN
2282 ) {
2283 /* Left with Data unread */
2284 struct mbuf *op_err;
19267c6d 2285 MGET(op_err, MB_DONTWAIT, MT_DATA);
8d60bf8a
EN
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;
8d60bf8a
EN
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 */
8d60bf8a
EN
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);
8d60bf8a
EN
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
6cef7136 2379 so->so_pcb = NULL;
8d60bf8a 2380 sofree(so);
8d60bf8a
EN
2381 }
2382
2383 if (ip_pcb->inp_options) {
f3f70f0d 2384 m_free(ip_pcb->inp_options);
8d60bf8a
EN
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 }
8e062f96 2397#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
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;
19267c6d 2417 MGET(op_err, MB_DONTWAIT, MT_DATA);
8d60bf8a
EN
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) {
e46d128d 2491 hashdestroy(inp->sctp_tcbhash, M_PCB, inp->sctp_hashmark);
8d60bf8a
EN
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();
8d60bf8a
EN
2504}
2505
2506
2507struct sctp_nets *
2508sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2509{
2510 struct sctp_nets *net;
633abfbf 2511#if 0
8d60bf8a 2512 struct sockaddr_in *sin;
633abfbf
SW
2513
2514 /* why do we need to check the port for a nets list on an assoc? */
8d60bf8a
EN
2515 /* use the peer's/remote port for lookup if unspecified */
2516 sin = (struct sockaddr_in *)addr;
8d60bf8a
EN
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 */
2536int
2537sctp_is_address_on_local_host(struct sockaddr *addr)
2538{
2539 struct ifnet *ifn;
b2632176 2540
8d60bf8a 2541 TAILQ_FOREACH(ifn, &ifnet, if_list) {
b2632176
SZ
2542 struct ifaddr_container *ifac;
2543
2544 TAILQ_FOREACH(ifac, &ifn->if_addrheads[mycpuid], ifa_link) {
2545 struct ifaddr *ifa = ifac->ifa;
2546
8d60bf8a
EN
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
2576int
2577sctp_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) {
a6ec04bc 2590 kprintf("Adding an address (from:%d) to the peer: ", from);
8d60bf8a
EN
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) {
a6ec04bc 2735 kprintf("Adding an address which is OUT OF SCOPE\n");
8d60bf8a
EN
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);
756b69cc 2755 callout_init(&net->pmtu_timer.timer, 0);
8d60bf8a
EN
2756#else
2757 callout_init(&net->rxt_timer.timer);
756b69cc 2758 callout_init(&net->pmtu_timer.timer);
8d60bf8a
EN
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;
8e062f96 2766#if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
f3f70f0d 2767 in6_embedscope(&sin6->sin6_addr, sin6,
8d60bf8a
EN
2768 &stcb->sctp_ep->ip_inp.inp, NULL);
2769#else
f3f70f0d 2770 in6_embedscope(&sin6->sin6_addr, sin6);
8d60bf8a
EN
2771#endif
2772#ifndef SCOPEDROUTING
2773 sin6->sin6_scope_id = 0;
2774#endif
2775 }
8e062f96 2776#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
8d60bf8a
EN
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;
f3f70f0d 2784 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
8d60bf8a
EN
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 */
2882struct sctp_tcb *
2883sctp_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) {
a6ec04bc 2917 kprintf("Allocate an association for peer:");
8d60bf8a
EN
2918 if (firstaddr)
2919 sctp_print_address(firstaddr);
2920 else
a6ec04bc
SW
2921 kprintf("None\n");
2922 kprintf("Port:%d\n",
8d60bf8a
EN
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) {
a6ec04bc 2933 kprintf("peer address invalid\n");
8d60bf8a
EN
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) {
a6ec04bc 2949 kprintf("peer address invalid\n");
8d60bf8a
EN
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) {
a6ec04bc 2961 kprintf("BAD family %d\n", firstaddr->sa_family);
8d60bf8a
EN
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) {
a6ec04bc 2976 kprintf("Doing implicit BIND\n");
8d60bf8a
EN
2977 }
2978#endif
2979
2980 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2038fb68 2981 NULL,
8e062f96 2982#if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2038fb68 2983 NULL
8d60bf8a 2984#else
2038fb68 2985 NULL
8d60bf8a
EN
2986#endif
2987 ))){
2988 /* bind error, probably perm */
2989#ifdef SCTP_DEBUG
2990 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
a6ec04bc 2991 kprintf("BIND FAILS ret:%d\n", err);
8d60bf8a
EN
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) {
a6ec04bc 3004 kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
8d60bf8a
EN
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) {
a6ec04bc 3026 kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
8d60bf8a
EN
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) {
a6ec04bc 3045 kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
8d60bf8a
EN
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)
884717e1 3064 kfree(asoc->strmout, M_PCB);
8d60bf8a 3065 if (asoc->mapping_array)
884717e1 3066 kfree(asoc->mapping_array, M_PCB);
8d60bf8a
EN
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) {
a6ec04bc 3072 kprintf("aloc_assoc: couldn't add remote addr!\n");
8d60bf8a
EN
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);
756b69cc 3086 callout_init(&asoc->delayed_event_timer.timer, 0);
8d60bf8a
EN
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);
756b69cc 3093 callout_init(&asoc->delayed_event_timer.timer);
8d60bf8a
EN
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) {
a6ec04bc 3105 kprintf("Association %p now allocated\n", stcb);
8d60bf8a
EN
3106 }
3107#endif
3108 return (stcb);
3109}
3110
3111void
3112sctp_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 */
3131int
3132sctp_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
3192static void
3193sctp_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) {
884717e1
SW
3237 twait_block = kmalloc(sizeof(struct sctp_tagblock), M_PCB,
3238 M_NOWAIT);
8d60bf8a
EN
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
3251static void
3252sctp_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 */
3295void
3296sctp_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;
8d60bf8a
EN
3304
3305 /* first, lets purge the entry from the hash table. */
8d60bf8a 3306 if (stcb->asoc.state == 0) {
a6ec04bc 3307 kprintf("Freeing already free association:%p - huh??\n",
8d60bf8a 3308 stcb);
8d60bf8a
EN
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) {
884717e1 3411 kfree(asoc->pending_reply, M_PCB);
8d60bf8a
EN
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) {
884717e1 3521 kfree(asoc->mapping_array, M_PCB);
8d60bf8a
EN
3522 asoc->mapping_array = NULL;
3523 }
3524
3525 /* the stream outs */
3526 if (asoc->strmout) {
884717e1 3527 kfree(asoc->strmout, M_PCB);
8d60bf8a
EN
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 }
884717e1 3555 kfree(asoc->strmin, M_PCB);
8d60bf8a
EN
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);
884717e1 3570 kfree(aparam, M_PCB);
8d60bf8a
EN
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--;
6d49aa6f
MD
3584 if ((inp->sctp_socket->so_snd.ssb_cc) ||
3585 (inp->sctp_socket->so_snd.ssb_mbcnt)) {
8d60bf8a 3586 /* This will happen when a abort is done */
6d49aa6f
MD
3587 inp->sctp_socket->so_snd.ssb_cc = 0;
3588 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
8d60bf8a
EN
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 */
3607 }
3608 }
3609 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3610 sctp_inpcb_free(inp, 0);
3611 }
8d60bf8a
EN
3612}
3613
3614
3615/*
3616 * determine if a destination is "reachable" based upon the addresses
3617 * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3618 */
3619/*
3620 * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3621 * to use assoc level v4/v6 flags, as the assoc *may* not have the
3622 * same address types bound as its endpoint
3623 */
3624int
3625sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3626{
3627 struct sctp_inpcb *inp;
3628 int answer;
3629
3630 /* No locks here, the TCB, in all cases is already
3631 * locked and an assoc is up. There is either a
3632 * INP lock by the caller applied (in asconf case when
3633 * deleting an address) or NOT in the HB case, however
3634 * if HB then the INP increment is up and the INP
3635 * will not be removed (on top of the fact that
3636 * we have a TCB lock). So we only want to
3637 * read the sctp_flags, which is either bound-all
3638 * or not.. no protection needed since once an
3639 * assoc is up you can't be changing your binding.
3640 */
3641 inp = stcb->sctp_ep;
3642 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3643 /* if bound all, destination is not restricted */
3644 /* RRS: Question during lock work: Is this
3645 * correct? If you are bound-all you still
3646 * might need to obey the V4--V6 flags???
3647 * IMO this bound-all stuff needs to be removed!
3648 */
3649 return (1);
3650 }
3651 /* NOTE: all "scope" checks are done when local addresses are added */
3652 if (destaddr->sa_family == AF_INET6) {
8e062f96 3653#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3654 answer = inp->inp_vflag & INP_IPV6;
3655#else
3656 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3657#endif
3658 } else if (destaddr->sa_family == AF_INET) {
8e062f96 3659#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3660 answer = inp->inp_vflag & INP_IPV4;
3661#else
3662 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3663#endif
3664 } else {
3665 /* invalid family, so it's unreachable */
3666 answer = 0;
3667 }
3668 return (answer);
3669}
3670
3671/*
3672 * update the inp_vflags on an endpoint
3673 */
3674static void
3675sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3676 struct sctp_laddr *laddr;
3677
3678 /* first clear the flag */
8e062f96 3679#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3680 inp->inp_vflag = 0;
3681#else
3682 inp->ip_inp.inp.inp_vflag = 0;
3683#endif
3684 /* set the flag based on addresses on the ep list */
3685 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3686 if (laddr->ifa == NULL) {
3687#ifdef SCTP_DEBUG
3688 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
a6ec04bc 3689 kprintf("An ounce of prevention is worth a pound of cure\n");
8d60bf8a
EN
3690 }
3691#endif /* SCTP_DEBUG */
3692 continue;
3693 }
3694 if (laddr->ifa->ifa_addr) {
3695 continue;
3696 }
3697 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
8e062f96 3698#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3699 inp->inp_vflag |= INP_IPV6;
3700#else
3701 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3702#endif
3703 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
8e062f96 3704#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3705 inp->inp_vflag |= INP_IPV4;
3706#else
3707 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3708#endif
3709 }
3710 }
3711}
3712
3713/*
3714 * Add the address to the endpoint local address list
3715 * There is nothing to be done if we are bound to all addresses
3716 */
3717int
3718sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3719{
3720 struct sctp_laddr *laddr;
3721 int fnd, error;
3722 fnd = 0;
3723
3724 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3725 /* You are already bound to all. You have it already */
3726 return (0);
3727 }
3728 if (ifa->ifa_addr->sa_family == AF_INET6) {
3729 struct in6_ifaddr *ifa6;
3730 ifa6 = (struct in6_ifaddr *)ifa;
3731 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3732 IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3733 /* Can't bind a non-existent addr. */
3734 return (-1);
3735 }
3736 /* first, is it already present? */
3737 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3738 if (laddr->ifa == ifa) {
3739 fnd = 1;
3740 break;
3741 }
3742 }
3743
3744 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3745 /* Not bound to all */
3746 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3747 if (error != 0)
3748 return (error);
3749 inp->laddr_count++;
3750 /* update inp_vflag flags */
3751 if (ifa->ifa_addr->sa_family == AF_INET6) {
8e062f96 3752#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3753 inp->inp_vflag |= INP_IPV6;
3754#else
3755 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3756#endif
3757 } else if (ifa->ifa_addr->sa_family == AF_INET) {
8e062f96 3758#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
8d60bf8a
EN
3759 inp->inp_vflag |= INP_IPV4;
3760#else
3761 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3762#endif
3763 }
3764 }
3765 return (0);
3766}
3767
3768
3769/*
3770 * select a new (hopefully reachable) destination net
3771 * (should only be used when we deleted an ep addr that is the
3772 * only usable source address to reach the destination net)
3773 */
3774static void
3775sctp_select_primary_destination(struct sctp_tcb *stcb)
3776{
3777 struct sctp_nets *net;
3778
3779 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3780 /* for now, we'll just pick the first reachable one we find */
3781 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3782 continue;
3783 if (sctp_destination_is_reachable(stcb,
3784 (struct sockaddr *)&net->ro._l_addr)) {
3785 /* found a reachable destination */
3786 stcb->asoc.primary_destination = net;
3787 }
3788 }
3789 /* I can't there from here! ...we're gonna die shortly... */
3790}
3791
3792
3793/*
3794 * Delete the address from the endpoint local address list
3795 * There is nothing to be done if we are bound to all addresses
3796 */
3797int
3798sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3799{
3800 struct sctp_laddr *laddr;
3801 int fnd;
3802 fnd = 0;
3803 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3804 /* You are already bound to all. You have it already */
3805 return (EINVAL);
3806 }
3807
3808 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3809 if (laddr->ifa == ifa) {
3810 fnd = 1;
3811 break;
3812 }
3813 }
3814 if (fnd && (inp->laddr_count < 2)) {
3815 /* can't delete unless there are at LEAST 2 addresses */
3816 return (-1);
3817 }
3818 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3819 /*
3820 * clean up any use of this address
3821 * go through our associations and clear any
3822 * last_used_address that match this one
3823 * for each assoc, see if a new primary_destination is needed
3824 */
3825 struct sctp_tcb *stcb;
3826
3827 /* clean up "next_addr_touse" */
3828 if (inp->next_addr_touse == laddr)
3829 /* delete this address */
3830 inp->next_addr_touse = NULL;
3831
3832 /* clean up "last_used_address" */
3833 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3834 if (stcb->asoc.last_used_address == laddr)
3835 /* delete this address */
3836 stcb->asoc.last_used_address = NULL;
3837 } /* for each tcb */
3838
3839 /* remove it from the ep list */
3840 sctp_remove_laddr(laddr);
3841 inp->laddr_count--;
3842 /* update inp_vflag flags */
3843 sctp_update_ep_vflag(inp);
3844 /* select a new primary destination if needed */
3845 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3846 /* presume caller (sctp_asconf.c) already owns INP lock */
3847 SCTP_TCB_LOCK(stcb);
3848 if (sctp_destination_is_reachable(stcb,
3849 (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3850 sctp_select_primary_destination(stcb);
3851 }
3852 SCTP_TCB_UNLOCK(stcb);
3853 } /* for each tcb */
3854 }
3855 return (0);
3856}
3857
3858/*
3859 * Add the addr to the TCB local address list
3860 * For the BOUNDALL or dynamic case, this is a "pending" address list
3861 * (eg. addresses waiting for an ASCONF-ACK response)
3862 * For the subset binding, static case, this is a "valid" address list
3863 */
3864int
3865sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3866{
8d60bf8a
EN
3867 struct sctp_laddr *laddr;
3868 int error;
3869
3870 /* Assumes TCP is locked.. and possiblye
3871 * the INP. May need to confirm/fix that if
3872 * we need it and is not the case.
3873 */
8d60bf8a
EN
3874 if (ifa->ifa_addr->sa_family == AF_INET6) {
3875 struct in6_ifaddr *ifa6;
3876 ifa6 = (struct in6_ifaddr *)ifa;
3877 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3878 /* IN6_IFF_DEPRECATED | */
3879 IN6_IFF_ANYCAST |
3880 IN6_IFF_NOTREADY))
3881 /* Can't bind a non-existent addr. */
3882 return (-1);
3883 }
3884 /* does the address already exist? */
3885 LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3886 if (laddr->ifa == ifa) {
3887 return (-1);
3888 }
3889 }
3890
3891 /* add to the list */
3892 error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3893 if (error != 0)
3894 return (error);
3895 return (0);
3896}
3897
3898/*
3899 * insert an laddr entry with the given ifa for the desired list
3900 */
3901int
3902sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3903 struct sctp_laddr *laddr;
8d60bf8a
EN
3904
3905 laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3906 if (laddr == NULL) {
3907 /* out of memory? */
8d60bf8a
EN
3908 return (EINVAL);
3909 }
3910 sctppcbinfo.ipi_count_laddr++;
3911 sctppcbinfo.ipi_gencnt_laddr++;
3912 bzero(laddr, sizeof(*laddr));
3913 laddr->ifa = ifa;
3914 /* insert it */
3915 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3916
8d60bf8a
EN
3917 return (0);
3918}
3919
3920/*
3921 * Remove an laddr entry from the local address list (on an assoc)
3922 */
3923void
3924sctp_remove_laddr(struct sctp_laddr *laddr)
3925{
8d60bf8a
EN
3926 /* remove from the list */
3927 LIST_REMOVE(laddr, sctp_nxt_addr);
3928 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3929 sctppcbinfo.ipi_count_laddr--;
3930 sctppcbinfo.ipi_gencnt_laddr++;
8d60bf8a
EN
3931}
3932
3933/*
3934 * Remove an address from the TCB local address list
3935 */
3936int
3937sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3938{
3939 struct sctp_inpcb *inp;
3940 struct sctp_laddr *laddr;
3941
3942 /* This is called by asconf work. It is assumed that
3943 * a) The TCB is locked
3944 * and
3945 * b) The INP is locked.
3946 * This is true in as much as I can trace through
3947 * the entry asconf code where I did these locks.
3948 * Again, the ASCONF code is a bit different in
3949 * that it does lock the INP during its work often
3950 * times. This must be since we don't want other
3951 * proc's looking up things while what they are
3952 * looking up is changing :-D
3953 */
3954
3955 inp = stcb->sctp_ep;
3956 /* if subset bound and don't allow ASCONF's, can't delete last */
3957 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3958 ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3959 if (stcb->asoc.numnets < 2) {
3960 /* can't delete last address */
3961 return (-1);
3962 }
3963 }
3964
3965 LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3966 /* remove the address if it exists */
3967 if (laddr->ifa == NULL)
3968 continue;
3969 if (laddr->ifa == ifa) {
3970 sctp_remove_laddr(laddr);
3971 return (0);
3972 }
3973 }
3974
3975 /* address not found! */
3976 return (-1);
3977}
3978
3979/*
3980 * Remove an address from the TCB local address list
3981 * lookup using a sockaddr addr
3982 */
3983int
3984sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
3985{
3986 struct sctp_inpcb *inp;
3987 struct sctp_laddr *laddr;
3988 struct sockaddr *l_sa;
3989
3990 /*
3991 * This function I find does not seem to have a caller.
3992 * As such we NEED TO DELETE this code. If we do
3993 * find a caller, the caller MUST have locked the TCB
3994 * at the least and probably the INP as well.
3995 */
3996 inp = stcb->sctp_ep;
3997 /* if subset bound and don't allow ASCONF's, can't delete last */
3998 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3999 ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4000 if (stcb->asoc.numnets < 2) {
4001 /* can't delete last address */
4002 return (-1);
4003 }
4004 }
4005
4006 LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4007 /* make sure the address exists */
4008 if (laddr->ifa == NULL)
4009 continue;
4010 if (laddr->ifa->ifa_addr == NULL)
4011 continue;
4012
4013 l_sa = laddr->ifa->ifa_addr;
4014 if (l_sa->sa_family == AF_INET6) {
4015 /* IPv6 address */
4016 struct sockaddr_in6 *sin1, *sin2;
4017 sin1 = (struct sockaddr_in6 *)l_sa;
4018 sin2 = (struct sockaddr_in6 *)sa;
4019 if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4020 sizeof(struct in6_addr)) == 0) {
4021 /* matched */
4022 sctp_remove_laddr(laddr);
4023 return (0);
4024 }
4025 } else if (l_sa->sa_family == AF_INET) {
4026 /* IPv4 address */
4027 struct sockaddr_in *sin1, *sin2;
4028 sin1 = (struct sockaddr_in *)l_sa;
4029 sin2 = (struct sockaddr_in *)sa;
4030 if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4031 /* matched */
4032 sctp_remove_laddr(laddr);
4033 return (0);
4034 }
4035 } else {
4036 /* invalid family */