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Update the agp(4) manpage. General description and example based on NetBSD
[dragonfly/netmp.git] / sys / netinet / sctp_pcb.c
blob5e394ad06509449587019353c1f51080a627a109
1 /* $KAME: sctp_pcb.c,v 1.37 2004/08/17 06:28:02 t-momose Exp $ */
2 /* $DragonFly: src/sys/netinet/sctp_pcb.c,v 1.12 2007/04/22 01:13:14 dillon Exp $ */
3
4 /*
5 * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Cisco Systems, Inc.
19 * 4. Neither the name of the project nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35 #if !(defined(__OpenBSD__) || defined(__APPLE__))
36 #include "opt_ipsec.h"
37 #endif
38 #if defined(__FreeBSD__) || defined(__DragonFly__)
39 #include "opt_compat.h"
40 #include "opt_inet6.h"
41 #include "opt_inet.h"
42 #endif
43 #if defined(__NetBSD__)
44 #include "opt_inet.h"
45 #endif
46 #ifdef __APPLE__
47 #include <sctp.h>
48 #elif !defined(__OpenBSD__)
49 #include "opt_sctp.h"
50 #endif
51
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/malloc.h>
55 #include <sys/mbuf.h>
56 #include <sys/domain.h>
57 #include <sys/protosw.h>
58 #include <sys/socket.h>
59 #include <sys/socketvar.h>
60 #include <sys/proc.h>
61 #include <sys/kernel.h>
62 #include <sys/sysctl.h>
63 #include <sys/thread2.h>
64 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
65 #include <sys/random.h>
66 #endif
67 #if defined(__NetBSD__)
68 #include <sys/rnd.h>
69 #endif
70 #if defined(__OpenBSD__)
71 #include <dev/rndvar.h>
72 #endif
73
74 #if defined(__APPLE__)
75 #include <netinet/sctp_callout.h>
76 #elif defined(__OpenBSD__)
77 #include <sys/timeout.h>
78 #else
79 #include <sys/callout.h>
80 #endif
81
82 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000)
83 #include <sys/limits.h>
84 #else
85 #include <machine/limits.h>
86 #endif
87 #include <machine/cpu.h>
88
89 #include <net/if.h>
90 #include <net/if_types.h>
91 #include <net/route.h>
92 #include <netinet/in.h>
93 #include <netinet/in_systm.h>
94 #include <netinet/ip.h>
95 #include <netinet/in_pcb.h>
96 #include <netinet/in_var.h>
97 #include <netinet/ip_var.h>
98
99 #ifdef INET6
100 #include <netinet/ip6.h>
101 #include <netinet6/ip6_var.h>
102 #include <netinet6/scope6_var.h>
103 #if defined(__FreeBSD__) || (__NetBSD__) || defined(__DragonFly__)
104 #include <netinet6/in6_pcb.h>
105 #elif defined(__OpenBSD__)
106 #include <netinet/in_pcb.h>
107 #endif
108 #endif /* INET6 */
109
110 #ifdef IPSEC
111 #ifndef __OpenBSD__
112 #include <netinet6/ipsec.h>
113 #include <netproto/key/key.h>
114 #else
115 #undef IPSEC
116 #endif
117 #endif /* IPSEC */
118
119 #include <netinet/sctp_var.h>
120 #include <netinet/sctp_pcb.h>
121 #include <netinet/sctputil.h>
122 #include <netinet/sctp.h>
123 #include <netinet/sctp_header.h>
124 #include <netinet/sctp_asconf.h>
125 #include <netinet/sctp_output.h>
126 #include <netinet/sctp_timer.h>
127
128 #ifndef SCTP_PCBHASHSIZE
129 /* default number of association hash buckets in each endpoint */
130 #define SCTP_PCBHASHSIZE 256
131 #endif
132
133 #ifdef SCTP_DEBUG
134 u_int32_t sctp_debug_on = 0;
135 #endif /* SCTP_DEBUG */
136
137 u_int32_t sctp_pegs[SCTP_NUMBER_OF_PEGS];
138
139 int sctp_pcbtblsize = SCTP_PCBHASHSIZE;
140
141 struct sctp_epinfo sctppcbinfo;
142
143 /* FIX: we don't handle multiple link local scopes */
144 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
145 int
146 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
147 {
148 struct in6_addr tmp_a, tmp_b;
149 /* use a copy of a and b */
150 tmp_a = *a;
151 tmp_b = *b;
152 in6_clearscope(&tmp_a);
153 in6_clearscope(&tmp_b);
154 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
155 }
156
157 #ifdef __OpenBSD__
158 extern int ipport_firstauto;
159 extern int ipport_lastauto;
160 extern int ipport_hifirstauto;
161 extern int ipport_hilastauto;
162 #endif
163
164 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
165
166 #ifndef xyzzy
167 void sctp_validate_no_locks(void);
168
169 void
170 SCTP_INP_RLOCK(struct sctp_inpcb *inp)
171 {
172 struct sctp_tcb *stcb;
173 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
174 if (mtx_owned(&(stcb)->tcb_mtx))
175 panic("I own TCB lock?");
176 }
177 if (mtx_owned(&(inp)->inp_mtx))
178 panic("INP Recursive Lock-R");
179 mtx_lock(&(inp)->inp_mtx);
180 }
181
182 void
183 SCTP_INP_WLOCK(struct sctp_inpcb *inp)
184 {
185 SCTP_INP_RLOCK(inp);
186 }
187
188 void
189 SCTP_INP_INFO_RLOCK(void)
190 {
191 struct sctp_inpcb *inp;
192 struct sctp_tcb *stcb;
193 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
194 if (mtx_owned(&(inp)->inp_mtx))
195 panic("info-lock and own inp lock?");
196 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
197 if (mtx_owned(&(stcb)->tcb_mtx))
198 panic("Info lock and own a tcb lock?");
199 }
200 }
201 if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
202 panic("INP INFO Recursive Lock-R");
203 mtx_lock(&sctppcbinfo.ipi_ep_mtx);
204 }
205
206 void
207 SCTP_INP_INFO_WLOCK(void)
208 {
209 SCTP_INP_INFO_RLOCK();
210 }
211
212
213 void sctp_validate_no_locks(void)
214 {
215 struct sctp_inpcb *inp;
216 struct sctp_tcb *stcb;
217
218 if (mtx_owned(&sctppcbinfo.ipi_ep_mtx))
219 panic("INP INFO lock is owned?");
220
221 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
222 if (mtx_owned(&(inp)->inp_mtx))
223 panic("You own an INP lock?");
224 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
225 if (mtx_owned(&(stcb)->tcb_mtx))
226 panic("You own a TCB lock?");
227 }
228 }
229 }
230
231 #endif
232 #endif
233
234 void
235 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
236 {
237 /* We really don't need
238 * to lock this, but I will
239 * just because it does not hurt.
240 */
241 SCTP_INP_INFO_RLOCK();
242 spcb->ep_count = sctppcbinfo.ipi_count_ep;
243 spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
244 spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
245 spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
246 spcb->chk_count = sctppcbinfo.ipi_count_chunk;
247 spcb->sockq_count = sctppcbinfo.ipi_count_sockq;
248 spcb->mbuf_track = sctppcbinfo.mbuf_track;
249 SCTP_INP_INFO_RUNLOCK();
250 }
251
252
253 /*
254 * Notes on locks for FreeBSD 5 and up. All association
255 * lookups that have a definte ep, the INP structure is
256 * assumed to be locked for reading. If we need to go
257 * find the INP (ususally when a **inp is passed) then
258 * we must lock the INFO structure first and if needed
259 * lock the INP too. Note that if we lock it we must
260 *
261 */
262
263
264 /*
265 * Given a endpoint, look and find in its association list any association
266 * with the "to" address given. This can be a "from" address, too, for
267 * inbound packets. For outbound packets it is a true "to" address.
268 */
269 static struct sctp_tcb *
270 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
271 struct sockaddr *to, struct sctp_nets **netp)
272 {
273 /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
274
275 /*
276 * Note for this module care must be taken when observing what to is
277 * for. In most of the rest of the code the TO field represents my
278 * peer and the FROM field represents my address. For this module it
279 * is reversed of that.
280 */
281 /*
282 * If we support the TCP model, then we must now dig through to
283 * see if we can find our endpoint in the list of tcp ep's.
284 */
285 uint16_t lport, rport;
286 struct sctppcbhead *ephead;
287 struct sctp_inpcb *inp;
288 struct sctp_laddr *laddr;
289 struct sctp_tcb *stcb;
290 struct sctp_nets *net;
291
292 if ((to == NULL) || (from == NULL)) {
293 return (NULL);
294 }
295
296 if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
297 lport = ((struct sockaddr_in *)to)->sin_port;
298 rport = ((struct sockaddr_in *)from)->sin_port;
299 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
300 lport = ((struct sockaddr_in6 *)to)->sin6_port;
301 rport = ((struct sockaddr_in6 *)from)->sin6_port;
302 } else {
303 return NULL;
304 }
305 ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
306 (lport + rport), sctppcbinfo.hashtcpmark)];
307 /*
308 * Ok now for each of the guys in this bucket we must look
309 * and see:
310 * - Does the remote port match.
311 * - Does there single association's addresses match this
312 * address (to).
313 * If so we update p_ep to point to this ep and return the
314 * tcb from it.
315 */
316 LIST_FOREACH(inp, ephead, sctp_hash) {
317 if (lport != inp->sctp_lport) {
318 continue;
319 }
320 SCTP_INP_RLOCK(inp);
321 /* check to see if the ep has one of the addresses */
322 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
323 /* We are NOT bound all, so look further */
324 int match = 0;
325
326 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
327 if (laddr->ifa == NULL) {
328 #ifdef SCTP_DEBUG
329 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
330 kprintf("An ounce of prevention is worth a pound of cure\n");
331 }
332 #endif
333 continue;
334 }
335 if (laddr->ifa->ifa_addr == NULL) {
336 #ifdef SCTP_DEBUG
337 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
338 kprintf("ifa with a NULL address\n");
339 }
340 #endif
341 continue;
342 }
343 if (laddr->ifa->ifa_addr->sa_family ==
344 to->sa_family) {
345 /* see if it matches */
346 struct sockaddr_in *intf_addr, *sin;
347 intf_addr = (struct sockaddr_in *)
348 laddr->ifa->ifa_addr;
349 sin = (struct sockaddr_in *)to;
350 if (from->sa_family == AF_INET) {
351 if (sin->sin_addr.s_addr ==
352 intf_addr->sin_addr.s_addr) {
353 match = 1;
354 SCTP_INP_RUNLOCK(inp);
355 break;
356 }
357 } else {
358 struct sockaddr_in6 *intf_addr6;
359 struct sockaddr_in6 *sin6;
360 sin6 = (struct sockaddr_in6 *)
361 to;
362 intf_addr6 = (struct sockaddr_in6 *)
363 laddr->ifa->ifa_addr;
364
365 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
366 &intf_addr6->sin6_addr)) {
367 match = 1;
368 SCTP_INP_RUNLOCK(inp);
369 break;
370 }
371 }
372 }
373 }
374 if (match == 0) {
375 /* This endpoint does not have this address */
376 SCTP_INP_RUNLOCK(inp);
377 continue;
378 }
379 }
380 /*
381 * Ok if we hit here the ep has the address, does it hold the
382 * tcb?
383 */
384
385 stcb = LIST_FIRST(&inp->sctp_asoc_list);
386 if (stcb == NULL) {
387 SCTP_INP_RUNLOCK(inp);
388 continue;
389 }
390 SCTP_TCB_LOCK(stcb);
391 if (stcb->rport != rport) {
392 /* remote port does not match. */
393 SCTP_TCB_UNLOCK(stcb);
394 SCTP_INP_RUNLOCK(inp);
395 continue;
396 }
397 /* Does this TCB have a matching address? */
398 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
399 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
400 /* not the same family, can't be a match */
401 continue;
402 }
403 if (from->sa_family == AF_INET) {
404 struct sockaddr_in *sin, *rsin;
405 sin = (struct sockaddr_in *)&net->ro._l_addr;
406 rsin = (struct sockaddr_in *)from;
407 if (sin->sin_addr.s_addr ==
408 rsin->sin_addr.s_addr) {
409 /* found it */
410 if (netp != NULL) {
411 *netp = net;
412 }
413 /* Update the endpoint pointer */
414 *inp_p = inp;
415 SCTP_INP_RUNLOCK(inp);
416 return (stcb);
417 }
418 } else {
419 struct sockaddr_in6 *sin6, *rsin6;
420 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
421 rsin6 = (struct sockaddr_in6 *)from;
422 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
423 &rsin6->sin6_addr)) {
424 /* found it */
425 if (netp != NULL) {
426 *netp = net;
427 }
428 /* Update the endpoint pointer */
429 *inp_p = inp;
430 SCTP_INP_RUNLOCK(inp);
431 return (stcb);
432 }
433 }
434 }
435 SCTP_TCB_UNLOCK(stcb);
436
437 SCTP_INP_RUNLOCK(inp);
438 }
439 return (NULL);
440 }
441
442 struct sctp_tcb *
443 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
444 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
445 {
446 struct sctp_tcb *stcb;
447 struct sockaddr_in *sin;
448 struct sockaddr_in6 *sin6;
449 struct sockaddr_storage local_store, remote_store;
450 struct ip *iph;
451 struct sctp_paramhdr parm_buf, *phdr;
452 int ptype;
453
454 memset(&local_store, 0, sizeof(local_store));
455 memset(&remote_store, 0, sizeof(remote_store));
456
457 /* First get the destination address setup too. */
458 iph = mtod(m, struct ip *);
459 if (iph->ip_v == IPVERSION) {
460 /* its IPv4 */
461 sin = (struct sockaddr_in *)&local_store;
462 sin->sin_family = AF_INET;
463 sin->sin_len = sizeof(*sin);
464 sin->sin_port = sh->dest_port;
465 sin->sin_addr.s_addr = iph->ip_dst.s_addr ;
466 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
467 /* its IPv6 */
468 struct ip6_hdr *ip6;
469 ip6 = mtod(m, struct ip6_hdr *);
470 sin6 = (struct sockaddr_in6 *)&local_store;
471 sin6->sin6_family = AF_INET6;
472 sin6->sin6_len = sizeof(*sin6);
473 sin6->sin6_port = sh->dest_port;
474 sin6->sin6_addr = ip6->ip6_dst;
475 } else {
476 return NULL;
477 }
478
479 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
480 &parm_buf, sizeof(struct sctp_paramhdr));
481 if (phdr == NULL) {
482 #ifdef SCTP_DEBUG
483 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
484 kprintf("sctp_process_control: failed to get asconf lookup addr\n");
485 }
486 #endif /* SCTP_DEBUG */
487 return NULL;
488 }
489 ptype = (int)((u_int)ntohs(phdr->param_type));
490 /* get the correlation address */
491 if (ptype == SCTP_IPV6_ADDRESS) {
492 /* ipv6 address param */
493 struct sctp_ipv6addr_param *p6, p6_buf;
494 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
495 return NULL;
496 }
497
498 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
499 offset + sizeof(struct sctp_asconf_chunk),
500 &p6_buf.ph, sizeof(*p6));
501 if (p6 == NULL) {
502 #ifdef SCTP_DEBUG
503 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
504 kprintf("sctp_process_control: failed to get asconf v6 lookup addr\n");
505 }
506 #endif /* SCTP_DEBUG */
507 return (NULL);
508 }
509 sin6 = (struct sockaddr_in6 *)&remote_store;
510 sin6->sin6_family = AF_INET6;
511 sin6->sin6_len = sizeof(*sin6);
512 sin6->sin6_port = sh->src_port;
513 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
514 } else if (ptype == SCTP_IPV4_ADDRESS) {
515 /* ipv4 address param */
516 struct sctp_ipv4addr_param *p4, p4_buf;
517 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
518 return NULL;
519 }
520
521 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
522 offset + sizeof(struct sctp_asconf_chunk),
523 &p4_buf.ph, sizeof(*p4));
524 if (p4 == NULL) {
525 #ifdef SCTP_DEBUG
526 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
527 kprintf("sctp_process_control: failed to get asconf v4 lookup addr\n");
528 }
529 #endif /* SCTP_DEBUG */
530 return (NULL);
531 }
532 sin = (struct sockaddr_in *)&remote_store;
533 sin->sin_family = AF_INET;
534 sin->sin_len = sizeof(*sin);
535 sin->sin_port = sh->src_port;
536 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
537 } else {
538 /* invalid address param type */
539 return NULL;
540 }
541
542 stcb = sctp_findassociation_ep_addr(inp_p,
543 (struct sockaddr *)&remote_store, netp,
544 (struct sockaddr *)&local_store, NULL);
545 return (stcb);
546 }
547
548 struct sctp_tcb *
549 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
550 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
551 {
552 struct sctpasochead *head;
553 struct sctp_inpcb *inp;
554 struct sctp_tcb *stcb;
555 struct sctp_nets *net;
556 uint16_t rport;
557
558 inp = *inp_p;
559 if (remote->sa_family == AF_INET) {
560 rport = (((struct sockaddr_in *)remote)->sin_port);
561 } else if (remote->sa_family == AF_INET6) {
562 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
563 } else {
564 return (NULL);
565 }
566 if (locked_tcb) {
567 /* UN-lock so we can do proper locking here
568 * this occurs when called from load_addresses_from_init.
569 */
570 SCTP_TCB_UNLOCK(locked_tcb);
571 }
572 SCTP_INP_INFO_RLOCK();
573 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
574 /*
575 * Now either this guy is our listner or it's the connector.
576 * If it is the one that issued the connect, then it's only
577 * chance is to be the first TCB in the list. If it is the
578 * acceptor, then do the special_lookup to hash and find the
579 * real inp.
580 */
581 if (inp->sctp_flags & SCTP_PCB_FLAGS_ACCEPTING) {
582 /* to is peer addr, from is my addr */
583 stcb = sctp_tcb_special_locate(inp_p, remote, local,
584 netp);
585 if ((stcb != NULL) && (locked_tcb == NULL)){
586 /* we have a locked tcb, lower refcount */
587 SCTP_INP_WLOCK(inp);
588 SCTP_INP_DECR_REF(inp);
589 SCTP_INP_WUNLOCK(inp);
590 }
591 if (locked_tcb != NULL) {
592 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
593 SCTP_TCB_LOCK(locked_tcb);
594 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
595 if (stcb != NULL)
596 SCTP_TCB_UNLOCK(stcb);
597 }
598 SCTP_INP_INFO_RUNLOCK();
599 return (stcb);
600 } else {
601 SCTP_INP_WLOCK(inp);
602 stcb = LIST_FIRST(&inp->sctp_asoc_list);
603 if (stcb == NULL) {
604 goto null_return;
605 }
606 SCTP_TCB_LOCK(stcb);
607 if (stcb->rport != rport) {
608 /* remote port does not match. */
609 SCTP_TCB_UNLOCK(stcb);
610 goto null_return;
611 }
612 /* now look at the list of remote addresses */
613 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
614 if (net->ro._l_addr.sa.sa_family !=
615 remote->sa_family) {
616 /* not the same family */
617 continue;
618 }
619 if (remote->sa_family == AF_INET) {
620 struct sockaddr_in *sin, *rsin;
621 sin = (struct sockaddr_in *)
622 &net->ro._l_addr;
623 rsin = (struct sockaddr_in *)remote;
624 if (sin->sin_addr.s_addr ==
625 rsin->sin_addr.s_addr) {
626 /* found it */
627 if (netp != NULL) {
628 *netp = net;
629 }
630 if (locked_tcb == NULL) {
631 SCTP_INP_DECR_REF(inp);
632 }
633 SCTP_INP_WUNLOCK(inp);
634 SCTP_INP_INFO_RUNLOCK();
635 return (stcb);
636 }
637 } else if (remote->sa_family == AF_INET6) {
638 struct sockaddr_in6 *sin6, *rsin6;
639 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
640 rsin6 = (struct sockaddr_in6 *)remote;
641 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
642 &rsin6->sin6_addr)) {
643 /* found it */
644 if (netp != NULL) {
645 *netp = net;
646 }
647 if (locked_tcb == NULL) {
648 SCTP_INP_DECR_REF(inp);
649 }
650 SCTP_INP_WUNLOCK(inp);
651 SCTP_INP_INFO_RUNLOCK();
652 return (stcb);
653 }
654 }
655 }
656 SCTP_TCB_UNLOCK(stcb);
657 }
658 } else {
659 SCTP_INP_WLOCK(inp);
660 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
661 inp->sctp_hashmark)];
662 if (head == NULL) {
663 goto null_return;
664 }
665 LIST_FOREACH(stcb, head, sctp_tcbhash) {
666 if (stcb->rport != rport) {
667 /* remote port does not match */
668 continue;
669 }
670 /* now look at the list of remote addresses */
671 SCTP_TCB_LOCK(stcb);
672 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
673 if (net->ro._l_addr.sa.sa_family !=
674 remote->sa_family) {
675 /* not the same family */
676 continue;
677 }
678 if (remote->sa_family == AF_INET) {
679 struct sockaddr_in *sin, *rsin;
680 sin = (struct sockaddr_in *)
681 &net->ro._l_addr;
682 rsin = (struct sockaddr_in *)remote;
683 if (sin->sin_addr.s_addr ==
684 rsin->sin_addr.s_addr) {
685 /* found it */
686 if (netp != NULL) {
687 *netp = net;
688 }
689 if (locked_tcb == NULL) {
690 SCTP_INP_DECR_REF(inp);
691 }
692 SCTP_INP_WUNLOCK(inp);
693 SCTP_INP_INFO_RUNLOCK();
694 return (stcb);
695 }
696 } else if (remote->sa_family == AF_INET6) {
697 struct sockaddr_in6 *sin6, *rsin6;
698 sin6 = (struct sockaddr_in6 *)
699 &net->ro._l_addr;
700 rsin6 = (struct sockaddr_in6 *)remote;
701 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
702 &rsin6->sin6_addr)) {
703 /* found it */
704 if (netp != NULL) {
705 *netp = net;
706 }
707 if (locked_tcb == NULL) {
708 SCTP_INP_DECR_REF(inp);
709 }
710 SCTP_INP_WUNLOCK(inp);
711 SCTP_INP_INFO_RUNLOCK();
712 return (stcb);
713 }
714 }
715 }
716 SCTP_TCB_UNLOCK(stcb);
717 }
718 }
719 null_return:
720 /* clean up for returning null */
721 if (locked_tcb){
722 if (locked_tcb->sctp_ep != inp) {
723 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
724 SCTP_TCB_LOCK(locked_tcb);
725 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
726 } else
727 SCTP_TCB_LOCK(locked_tcb);
728 }
729 SCTP_INP_WUNLOCK(inp);
730 SCTP_INP_INFO_RUNLOCK();
731 /* not found */
732 return (NULL);
733 }
734
735 /*
736 * Find an association for a specific endpoint using the association id
737 * given out in the COMM_UP notification
738 */
739 struct sctp_tcb *
740 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, caddr_t asoc_id)
741 {
742 /*
743 * Use my the assoc_id to find a endpoint
744 */
745 struct sctpasochead *head;
746 struct sctp_tcb *stcb;
747 u_int32_t vtag;
748
749 if (asoc_id == 0 || inp == NULL) {
750 return (NULL);
751 }
752 SCTP_INP_INFO_RLOCK();
753 vtag = (u_int32_t)asoc_id;
754 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
755 sctppcbinfo.hashasocmark)];
756 if (head == NULL) {
757 /* invalid vtag */
758 SCTP_INP_INFO_RUNLOCK();
759 return (NULL);
760 }
761 LIST_FOREACH(stcb, head, sctp_asocs) {
762 SCTP_INP_RLOCK(stcb->sctp_ep);
763 SCTP_TCB_LOCK(stcb);
764 SCTP_INP_RUNLOCK(stcb->sctp_ep);
765 if (stcb->asoc.my_vtag == vtag) {
766 /* candidate */
767 if (inp != stcb->sctp_ep) {
768 /* some other guy has the
769 * same vtag active (vtag collision).
770 */
771 sctp_pegs[SCTP_VTAG_BOGUS]++;
772 SCTP_TCB_UNLOCK(stcb);
773 continue;
774 }
775 sctp_pegs[SCTP_VTAG_EXPR]++;
776 SCTP_INP_INFO_RUNLOCK();
777 return (stcb);
778 }
779 SCTP_TCB_UNLOCK(stcb);
780 }
781 SCTP_INP_INFO_RUNLOCK();
782 return (NULL);
783 }
784
785 static struct sctp_inpcb *
786 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
787 uint16_t lport)
788 {
789 struct sctp_inpcb *inp;
790 struct sockaddr_in *sin;
791 struct sockaddr_in6 *sin6;
792 struct sctp_laddr *laddr;
793
794 /* Endpoing probe expects
795 * that the INP_INFO is locked.
796 */
797 if (nam->sa_family == AF_INET) {
798 sin = (struct sockaddr_in *)nam;
799 sin6 = NULL;
800 } else if (nam->sa_family == AF_INET6) {
801 sin6 = (struct sockaddr_in6 *)nam;
802 sin = NULL;
803 } else {
804 /* unsupported family */
805 return (NULL);
806 }
807 if (head == NULL)
808 return (NULL);
809
810 LIST_FOREACH(inp, head, sctp_hash) {
811 SCTP_INP_RLOCK(inp);
812
813 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
814 (inp->sctp_lport == lport)) {
815 /* got it */
816 if ((nam->sa_family == AF_INET) &&
817 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
818 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
819 (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
820 #else
821 #if defined(__OpenBSD__)
822 (0) /* For open bsd we do dual bind only */
823 #else
824 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
825 #endif
826 #endif
827 ) {
828 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
829 SCTP_INP_RUNLOCK(inp);
830 continue;
831 }
832 /* A V6 address and the endpoint is NOT bound V6 */
833 if (nam->sa_family == AF_INET6 &&
834 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
835 SCTP_INP_RUNLOCK(inp);
836 continue;
837 }
838 SCTP_INP_RUNLOCK(inp);
839 return (inp);
840 }
841 SCTP_INP_RUNLOCK(inp);
842 }
843
844 if ((nam->sa_family == AF_INET) &&
845 (sin->sin_addr.s_addr == INADDR_ANY)) {
846 /* Can't hunt for one that has no address specified */
847 return (NULL);
848 } else if ((nam->sa_family == AF_INET6) &&
849 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
850 /* Can't hunt for one that has no address specified */
851 return (NULL);
852 }
853 /*
854 * ok, not bound to all so see if we can find a EP bound to this
855 * address.
856 */
857 #ifdef SCTP_DEBUG
858 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
859 kprintf("Ok, there is NO bound-all available for port:%x\n", ntohs(lport));
860 }
861 #endif
862 LIST_FOREACH(inp, head, sctp_hash) {
863 SCTP_INP_RLOCK(inp);
864 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
865 SCTP_INP_RUNLOCK(inp);
866 continue;
867 }
868 /*
869 * Ok this could be a likely candidate, look at all of
870 * its addresses
871 */
872 if (inp->sctp_lport != lport) {
873 SCTP_INP_RUNLOCK(inp);
874 continue;
875 }
876 #ifdef SCTP_DEBUG
877 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
878 kprintf("Ok, found maching local port\n");
879 }
880 #endif
881 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
882 if (laddr->ifa == NULL) {
883 #ifdef SCTP_DEBUG
884 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
885 kprintf("An ounce of prevention is worth a pound of cure\n");
886 }
887 #endif
888 continue;
889 }
890 #ifdef SCTP_DEBUG
891 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
892 kprintf("Ok laddr->ifa:%p is possible, ",
893 laddr->ifa);
894 }
895 #endif
896 if (laddr->ifa->ifa_addr == NULL) {
897 #ifdef SCTP_DEBUG
898 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
899 kprintf("Huh IFA as an ifa_addr=NULL, ");
900 }
901 #endif
902 continue;
903 }
904 #ifdef SCTP_DEBUG
905 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
906 kprintf("Ok laddr->ifa:%p is possible, ",
907 laddr->ifa->ifa_addr);
908 sctp_print_address(laddr->ifa->ifa_addr);
909 kprintf("looking for ");
910 sctp_print_address(nam);
911 }
912 #endif
913 if (laddr->ifa->ifa_addr->sa_family == nam->sa_family) {
914 /* possible, see if it matches */
915 struct sockaddr_in *intf_addr;
916 intf_addr = (struct sockaddr_in *)
917 laddr->ifa->ifa_addr;
918 if (nam->sa_family == AF_INET) {
919 if (sin->sin_addr.s_addr ==
920 intf_addr->sin_addr.s_addr) {
921 #ifdef SCTP_DEBUG
922 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
923 kprintf("YES, return ep:%p\n", inp);
924 }
925 #endif
926 SCTP_INP_RUNLOCK(inp);
927 return (inp);
928 }
929 } else if (nam->sa_family == AF_INET6) {
930 struct sockaddr_in6 *intf_addr6;
931 intf_addr6 = (struct sockaddr_in6 *)
932 laddr->ifa->ifa_addr;
933 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
934 &intf_addr6->sin6_addr)) {
935 #ifdef SCTP_DEBUG
936 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
937 kprintf("YES, return ep:%p\n", inp);
938 }
939 #endif
940 SCTP_INP_RUNLOCK(inp);
941 return (inp);
942 }
943 }
944 }
945 SCTP_INP_RUNLOCK(inp);
946 }
947 }
948 #ifdef SCTP_DEBUG
949 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
950 kprintf("NO, Falls out to NULL\n");
951 }
952 #endif
953 return (NULL);
954 }
955
956
957 struct sctp_inpcb *
958 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock)
959 {
960 /*
961 * First we check the hash table to see if someone has this port
962 * bound with just the port.
963 */
964 struct sctp_inpcb *inp;
965 struct sctppcbhead *head;
966 struct sockaddr_in *sin;
967 struct sockaddr_in6 *sin6;
968 int lport;
969 #ifdef SCTP_DEBUG
970 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
971 kprintf("Looking for endpoint %d :",
972 ntohs(((struct sockaddr_in *)nam)->sin_port));
973 sctp_print_address(nam);
974 }
975 #endif
976 if (nam->sa_family == AF_INET) {
977 sin = (struct sockaddr_in *)nam;
978 lport = ((struct sockaddr_in *)nam)->sin_port;
979 } else if (nam->sa_family == AF_INET6) {
980 sin6 = (struct sockaddr_in6 *)nam;
981 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
982 } else {
983 /* unsupported family */
984 return (NULL);
985 }
986 /*
987 * I could cheat here and just cast to one of the types but we will
988 * do it right. It also provides the check against an Unsupported
989 * type too.
990 */
991 /* Find the head of the ALLADDR chain */
992 if (have_lock == 0)
993 SCTP_INP_INFO_RLOCK();
994 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
995 sctppcbinfo.hashmark)];
996 #ifdef SCTP_DEBUG
997 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
998 kprintf("Main hash to lookup at head:%p\n", head);
999 }
1000 #endif
1001 inp = sctp_endpoint_probe(nam, head, lport);
1002
1003 /*
1004 * If the TCP model exists it could be that the main listening
1005 * endpoint is gone but there exists a connected socket for this
1006 * guy yet. If so we can return the first one that we find. This
1007 * may NOT be the correct one but the sctp_findassociation_ep_addr
1008 * has further code to look at all TCP models.
1009 */
1010 if (inp == NULL && find_tcp_pool) {
1011 unsigned int i;
1012 #ifdef SCTP_DEBUG
1013 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1014 kprintf("EP was NULL and TCP model is supported\n");
1015 }
1016 #endif
1017 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1018 /*
1019 * This is real gross, but we do NOT have a remote
1020 * port at this point depending on who is calling. We
1021 * must therefore look for ANY one that matches our
1022 * local port :/
1023 */
1024 head = &sctppcbinfo.sctp_tcpephash[i];
1025 if (LIST_FIRST(head)) {
1026 inp = sctp_endpoint_probe(nam, head, lport);
1027 if (inp) {
1028 /* Found one */
1029 break;
1030 }
1031 }
1032 }
1033 }
1034 #ifdef SCTP_DEBUG
1035 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1036 kprintf("EP to return is %p\n", inp);
1037 }
1038 #endif
1039 if (have_lock == 0) {
1040 if (inp) {
1041 SCTP_INP_WLOCK(inp);
1042 SCTP_INP_INCR_REF(inp);
1043 SCTP_INP_WUNLOCK(inp);
1044 }
1045 SCTP_INP_INFO_RUNLOCK();
1046 } else {
1047 if (inp) {
1048 SCTP_INP_WLOCK(inp);
1049 SCTP_INP_INCR_REF(inp);
1050 SCTP_INP_WUNLOCK(inp);
1051 }
1052 }
1053 return (inp);
1054 }
1055
1056 /*
1057 * Find an association for an endpoint with the pointer to whom you want
1058 * to send to and the endpoint pointer. The address can be IPv4 or IPv6.
1059 * We may need to change the *to to some other struct like a mbuf...
1060 */
1061 struct sctp_tcb *
1062 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1063 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool)
1064 {
1065 struct sctp_inpcb *inp;
1066 struct sctp_tcb *retval;
1067
1068 SCTP_INP_INFO_RLOCK();
1069 if (find_tcp_pool) {
1070 if (inp_p != NULL) {
1071 retval = sctp_tcb_special_locate(inp_p, from, to, netp);
1072 } else {
1073 retval = sctp_tcb_special_locate(&inp, from, to, netp);
1074 }
1075 if (retval != NULL) {
1076 SCTP_INP_INFO_RUNLOCK();
1077 return (retval);
1078 }
1079 }
1080 inp = sctp_pcb_findep(to, 0, 1);
1081 if (inp_p != NULL) {
1082 *inp_p = inp;
1083 }
1084 SCTP_INP_INFO_RUNLOCK();
1085
1086 if (inp == NULL) {
1087 return (NULL);
1088 }
1089
1090 /*
1091 * ok, we have an endpoint, now lets find the assoc for it (if any)
1092 * we now place the source address or from in the to of the find
1093 * endpoint call. Since in reality this chain is used from the
1094 * inbound packet side.
1095 */
1096 if (inp_p != NULL) {
1097 return (sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL));
1098 } else {
1099 return (sctp_findassociation_ep_addr(&inp, from, netp, to, NULL));
1100 }
1101 }
1102
1103
1104 /*
1105 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1106 * find all addresses that the sender has specified in any address list.
1107 * Each address will be used to lookup the TCB and see if one exits.
1108 */
1109 static struct sctp_tcb *
1110 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1111 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1112 struct sockaddr *dest)
1113 {
1114 struct sockaddr_in sin4;
1115 struct sockaddr_in6 sin6;
1116 struct sctp_paramhdr *phdr, parm_buf;
1117 struct sctp_tcb *retval;
1118 u_int32_t ptype, plen;
1119
1120 memset(&sin4, 0, sizeof(sin4));
1121 memset(&sin6, 0, sizeof(sin6));
1122 sin4.sin_len = sizeof(sin4);
1123 sin4.sin_family = AF_INET;
1124 sin4.sin_port = sh->src_port;
1125 sin6.sin6_len = sizeof(sin6);
1126 sin6.sin6_family = AF_INET6;
1127 sin6.sin6_port = sh->src_port;
1128
1129 retval = NULL;
1130 offset += sizeof(struct sctp_init_chunk);
1131
1132 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1133 while (phdr != NULL) {
1134 /* now we must see if we want the parameter */
1135 ptype = ntohs(phdr->param_type);
1136 plen = ntohs(phdr->param_length);
1137 if (plen == 0) {
1138 #ifdef SCTP_DEBUG
1139 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1140 kprintf("sctp_findassociation_special_addr: Impossible length in parameter\n");
1141 }
1142 #endif /* SCTP_DEBUG */
1143 break;
1144 }
1145 if (ptype == SCTP_IPV4_ADDRESS &&
1146 plen == sizeof(struct sctp_ipv4addr_param)) {
1147 /* Get the rest of the address */
1148 struct sctp_ipv4addr_param ip4_parm, *p4;
1149
1150 phdr = sctp_get_next_param(m, offset,
1151 (struct sctp_paramhdr *)&ip4_parm, plen);
1152 if (phdr == NULL) {
1153 return (NULL);
1154 }
1155 p4 = (struct sctp_ipv4addr_param *)phdr;
1156 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1157 /* look it up */
1158 retval = sctp_findassociation_ep_addr(inp_p,
1159 (struct sockaddr *)&sin4, netp, dest, NULL);
1160 if (retval != NULL) {
1161 return (retval);
1162 }
1163 } else if (ptype == SCTP_IPV6_ADDRESS &&
1164 plen == sizeof(struct sctp_ipv6addr_param)) {
1165 /* Get the rest of the address */
1166 struct sctp_ipv6addr_param ip6_parm, *p6;
1167
1168 phdr = sctp_get_next_param(m, offset,
1169 (struct sctp_paramhdr *)&ip6_parm, plen);
1170 if (phdr == NULL) {
1171 return (NULL);
1172 }
1173 p6 = (struct sctp_ipv6addr_param *)phdr;
1174 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1175 /* look it up */
1176 retval = sctp_findassociation_ep_addr(inp_p,
1177 (struct sockaddr *)&sin6, netp, dest, NULL);
1178 if (retval != NULL) {
1179 return (retval);
1180 }
1181 }
1182 offset += SCTP_SIZE32(plen);
1183 phdr = sctp_get_next_param(m, offset, &parm_buf,
1184 sizeof(parm_buf));
1185 }
1186 return (NULL);
1187 }
1188
1189 static struct sctp_tcb *
1190 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1191 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1192 uint16_t lport)
1193 {
1194 /*
1195 * Use my vtag to hash. If we find it we then verify the source addr
1196 * is in the assoc. If all goes well we save a bit on rec of a packet.
1197 */
1198 struct sctpasochead *head;
1199 struct sctp_nets *net;
1200 struct sctp_tcb *stcb;
1201
1202 SCTP_INP_INFO_RLOCK();
1203 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1204 sctppcbinfo.hashasocmark)];
1205 if (head == NULL) {
1206 /* invalid vtag */
1207 SCTP_INP_INFO_RUNLOCK();
1208 return (NULL);
1209 }
1210 LIST_FOREACH(stcb, head, sctp_asocs) {
1211 SCTP_INP_RLOCK(stcb->sctp_ep);
1212 SCTP_TCB_LOCK(stcb);
1213 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1214 if (stcb->asoc.my_vtag == vtag) {
1215 /* candidate */
1216 if (stcb->rport != rport) {
1217 /*
1218 * we could remove this if vtags are unique
1219 * across the system.
1220 */
1221 SCTP_TCB_UNLOCK(stcb);
1222 continue;
1223 }
1224 if (stcb->sctp_ep->sctp_lport != lport) {
1225 /*
1226 * we could remove this if vtags are unique
1227 * across the system.
1228 */
1229 SCTP_TCB_UNLOCK(stcb);
1230 continue;
1231 }
1232 net = sctp_findnet(stcb, from);
1233 if (net) {
1234 /* yep its him. */
1235 *netp = net;
1236 sctp_pegs[SCTP_VTAG_EXPR]++;
1237 *inp_p = stcb->sctp_ep;
1238 SCTP_INP_INFO_RUNLOCK();
1239 return (stcb);
1240 } else {
1241 /* not him, this should only
1242 * happen in rare cases so
1243 * I peg it.
1244 */
1245 sctp_pegs[SCTP_VTAG_BOGUS]++;
1246 }
1247 }
1248 SCTP_TCB_UNLOCK(stcb);
1249 }
1250 SCTP_INP_INFO_RUNLOCK();
1251 return (NULL);
1252 }
1253
1254 /*
1255 * Find an association with the pointer to the inbound IP packet. This
1256 * can be a IPv4 or IPv6 packet.
1257 */
1258 struct sctp_tcb *
1259 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1260 struct sctphdr *sh, struct sctp_chunkhdr *ch,
1261 struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1262 {
1263 int find_tcp_pool;
1264 struct ip *iph;
1265 struct sctp_tcb *retval;
1266 struct sockaddr_storage to_store, from_store;
1267 struct sockaddr *to = (struct sockaddr *)&to_store;
1268 struct sockaddr *from = (struct sockaddr *)&from_store;
1269 struct sctp_inpcb *inp;
1270
1271
1272 iph = mtod(m, struct ip *);
1273 if (iph->ip_v == IPVERSION) {
1274 /* its IPv4 */
1275 struct sockaddr_in *to4, *from4;
1276
1277 to4 = (struct sockaddr_in *)&to_store;
1278 from4 = (struct sockaddr_in *)&from_store;
1279 bzero(to4, sizeof(*to4));
1280 bzero(from4, sizeof(*from4));
1281 from4->sin_family = to4->sin_family = AF_INET;
1282 from4->sin_len = to4->sin_len = sizeof(struct sockaddr_in);
1283 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1284 to4->sin_addr.s_addr = iph->ip_dst.s_addr ;
1285 from4->sin_port = sh->src_port;
1286 to4->sin_port = sh->dest_port;
1287 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1288 /* its IPv6 */
1289 struct ip6_hdr *ip6;
1290 struct sockaddr_in6 *to6, *from6;
1291
1292 ip6 = mtod(m, struct ip6_hdr *);
1293 to6 = (struct sockaddr_in6 *)&to_store;
1294 from6 = (struct sockaddr_in6 *)&from_store;
1295 bzero(to6, sizeof(*to6));
1296 bzero(from6, sizeof(*from6));
1297 from6->sin6_family = to6->sin6_family = AF_INET6;
1298 from6->sin6_len = to6->sin6_len = sizeof(struct sockaddr_in6);
1299 to6->sin6_addr = ip6->ip6_dst;
1300 from6->sin6_addr = ip6->ip6_src;
1301 from6->sin6_port = sh->src_port;
1302 to6->sin6_port = sh->dest_port;
1303 /* Get the scopes in properly to the sin6 addr's */
1304 in6_recoverscope(to6, &to6->sin6_addr, NULL);
1305 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1306 in6_embedscope(&to6->sin6_addr, to6, NULL, NULL);
1307 #else
1308 in6_embedscope(&to6->sin6_addr, to6);
1309 #endif
1310
1311 in6_recoverscope(from6, &from6->sin6_addr, NULL);
1312 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1313 in6_embedscope(&from6->sin6_addr, from6, NULL, NULL);
1314 #else
1315 in6_embedscope(&from6->sin6_addr, from6);
1316 #endif
1317 } else {
1318 /* Currently not supported. */
1319 return (NULL);
1320 }
1321 #ifdef SCTP_DEBUG
1322 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1323 kprintf("Looking for port %d address :",
1324 ntohs(((struct sockaddr_in *)to)->sin_port));
1325 sctp_print_address(to);
1326 kprintf("From for port %d address :",
1327 ntohs(((struct sockaddr_in *)from)->sin_port));
1328 sctp_print_address(from);
1329 }
1330 #endif
1331
1332 if (sh->v_tag) {
1333 /* we only go down this path if vtag is non-zero */
1334 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1335 inp_p, netp, sh->src_port, sh->dest_port);
1336 if (retval) {
1337 return (retval);
1338 }
1339 }
1340 find_tcp_pool = 0;
1341 if ((ch->chunk_type != SCTP_INITIATION) &&
1342 (ch->chunk_type != SCTP_INITIATION_ACK) &&
1343 (ch->chunk_type != SCTP_COOKIE_ACK) &&
1344 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1345 /* Other chunk types go to the tcp pool. */
1346 find_tcp_pool = 1;
1347 }
1348 if (inp_p) {
1349 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1350 find_tcp_pool);
1351 inp = *inp_p;
1352 } else {
1353 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1354 find_tcp_pool);
1355 }
1356 #ifdef SCTP_DEBUG
1357 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1358 kprintf("retval:%p inp:%p\n", retval, inp);
1359 }
1360 #endif
1361 if (retval == NULL && inp) {
1362 /* Found a EP but not this address */
1363 #ifdef SCTP_DEBUG
1364 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1365 kprintf("Found endpoint %p but no asoc - ep state:%x\n",
1366 inp, inp->sctp_flags);
1367 }
1368 #endif
1369 if ((ch->chunk_type == SCTP_INITIATION) ||
1370 (ch->chunk_type == SCTP_INITIATION_ACK)) {
1371 /*
1372 * special hook, we do NOT return linp or an
1373 * association that is linked to an existing
1374 * association that is under the TCP pool (i.e. no
1375 * listener exists). The endpoint finding routine
1376 * will always find a listner before examining the
1377 * TCP pool.
1378 */
1379 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1380 #ifdef SCTP_DEBUG
1381 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1382 kprintf("Gak, its in the TCP pool... return NULL");
1383 }
1384 #endif
1385 if (inp_p) {
1386 *inp_p = NULL;
1387 }
1388 return (NULL);
1389 }
1390 #ifdef SCTP_DEBUG
1391 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1392 kprintf("Now doing SPECIAL find\n");
1393 }
1394 #endif
1395 retval = sctp_findassociation_special_addr(m, iphlen,
1396 offset, sh, inp_p, netp, to);
1397 }
1398 }
1399 #ifdef SCTP_DEBUG
1400 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1401 kprintf("retval is %p\n", retval);
1402 }
1403 #endif
1404 return (retval);
1405 }
1406
1407 extern int sctp_max_burst_default;
1408
1409 extern unsigned int sctp_delayed_sack_time_default;
1410 extern unsigned int sctp_heartbeat_interval_default;
1411 extern unsigned int sctp_pmtu_raise_time_default;
1412 extern unsigned int sctp_shutdown_guard_time_default;
1413 extern unsigned int sctp_secret_lifetime_default;
1414
1415 extern unsigned int sctp_rto_max_default;
1416 extern unsigned int sctp_rto_min_default;
1417 extern unsigned int sctp_rto_initial_default;
1418 extern unsigned int sctp_init_rto_max_default;
1419 extern unsigned int sctp_valid_cookie_life_default;
1420 extern unsigned int sctp_init_rtx_max_default;
1421 extern unsigned int sctp_assoc_rtx_max_default;
1422 extern unsigned int sctp_path_rtx_max_default;
1423 extern unsigned int sctp_nr_outgoing_streams_default;
1424
1425 /*
1426 * allocate a sctp_inpcb and setup a temporary binding to a port/all
1427 * addresses. This way if we don't get a bind we by default pick a ephemeral
1428 * port with all addresses bound.
1429 */
1430 int
1431 sctp_inpcb_alloc(struct socket *so)
1432 {
1433 /*
1434 * we get called when a new endpoint starts up. We need to allocate
1435 * the sctp_inpcb structure from the zone and init it. Mark it as
1436 * unbound and find a port that we can use as an ephemeral with
1437 * INADDR_ANY. If the user binds later no problem we can then add
1438 * in the specific addresses. And setup the default parameters for
1439 * the EP.
1440 */
1441 int i, error;
1442 struct sctp_inpcb *inp, *n_inp;
1443 struct sctp_pcb *m;
1444 struct timeval time;
1445
1446 error = 0;
1447
1448 /* Hack alert:
1449 *
1450 * This code audits the entire INP list to see if
1451 * any ep's that are in the GONE state are now
1452 * all free. This should not happen really since when
1453 * the last association if freed we should end up deleting
1454 * the inpcb. This code including the locks should
1455 * be taken out ... since the last set of fixes I
1456 * have not seen the "Found a GONE on list" has not
1457 * came out. But i am paranoid and we will leave this
1458 * in at the cost of efficency on allocation of PCB's.
1459 * Probably we should move this to the invariant
1460 * compile options
1461 */
1462 /* #ifdef INVARIANTS*/
1463 SCTP_INP_INFO_RLOCK();
1464 inp = LIST_FIRST(&sctppcbinfo.listhead);
1465 while (inp) {
1466 n_inp = LIST_NEXT(inp, sctp_list);
1467 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1468 if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
1469 /* finish the job now */
1470 kprintf("Found a GONE on list\n");
1471 SCTP_INP_INFO_RUNLOCK();
1472 sctp_inpcb_free(inp, 1);
1473 SCTP_INP_INFO_RLOCK();
1474 }
1475 }
1476 inp = n_inp;
1477 }
1478 SCTP_INP_INFO_RUNLOCK();
1479 /* #endif INVARIANTS*/
1480
1481 SCTP_INP_INFO_WLOCK();
1482 inp = (struct sctp_inpcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep);
1483 if (inp == NULL) {
1484 kprintf("Out of SCTP-INPCB structures - no resources\n");
1485 SCTP_INP_INFO_WUNLOCK();
1486 return (ENOBUFS);
1487 }
1488
1489 /* zap it */
1490 bzero(inp, sizeof(*inp));
1491
1492 /* bump generations */
1493 inp->ip_inp.inp.inp_socket = so;
1494
1495 /* setup socket pointers */
1496 inp->sctp_socket = so;
1497
1498 /* setup inpcb socket too */
1499 inp->ip_inp.inp.inp_socket = so;
1500 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1501 #ifdef IPSEC
1502 #if !(defined(__OpenBSD__) || defined(__APPLE__))
1503 {
1504 struct inpcbpolicy *pcb_sp = NULL;
1505 error = ipsec_init_policy(so, &pcb_sp);
1506 /* Arrange to share the policy */
1507 inp->ip_inp.inp.inp_sp = pcb_sp;
1508 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1509 }
1510 #else
1511 /* not sure what to do for openbsd here */
1512 error = 0;
1513 #endif
1514 if (error != 0) {
1515 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1516 SCTP_INP_INFO_WUNLOCK();
1517 return error;
1518 }
1519 #endif /* IPSEC */
1520 sctppcbinfo.ipi_count_ep++;
1521 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1522 inp->ip_inp.inp.inp_gencnt = ++sctppcbinfo.ipi_gencnt_ep;
1523 inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1524 #else
1525 inp->inp_ip_ttl = ip_defttl;
1526 inp->inp_ip_tos = 0;
1527 #endif
1528
1529 so->so_pcb = (caddr_t)inp;
1530
1531 if ((so->so_type == SOCK_DGRAM) ||
1532 (so->so_type == SOCK_SEQPACKET)) {
1533 /* UDP style socket */
1534 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1535 SCTP_PCB_FLAGS_UNBOUND);
1536 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1537 } else if (so->so_type == SOCK_STREAM) {
1538 /* TCP style socket */
1539 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1540 SCTP_PCB_FLAGS_UNBOUND);
1541 inp->sctp_flags |= (SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1542 } else {
1543 /*
1544 * unsupported socket type (RAW, etc)- in case we missed
1545 * it in protosw
1546 */
1547 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1548 SCTP_INP_INFO_WUNLOCK();
1549 return (EOPNOTSUPP);
1550 }
1551 inp->sctp_tcbhash = hashinit(sctp_pcbtblsize,
1552 #ifdef __NetBSD__
1553 HASH_LIST,
1554 #endif
1555 M_PCB,
1556 #if defined(__NetBSD__) || defined(__OpenBSD__)
1557 M_WAITOK,
1558 #endif
1559 &inp->sctp_hashmark);
1560 if (inp->sctp_tcbhash == NULL) {
1561 kprintf("Out of SCTP-INPCB->hashinit - no resources\n");
1562 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1563 SCTP_INP_INFO_WUNLOCK();
1564 return (ENOBUFS);
1565 }
1566 /* LOCK init's */
1567 SCTP_INP_LOCK_INIT(inp);
1568 SCTP_ASOC_CREATE_LOCK_INIT(inp);
1569 /* lock the new ep */
1570 SCTP_INP_WLOCK(inp);
1571
1572 /* add it to the info area */
1573 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1574 SCTP_INP_INFO_WUNLOCK();
1575
1576 LIST_INIT(&inp->sctp_addr_list);
1577 LIST_INIT(&inp->sctp_asoc_list);
1578 TAILQ_INIT(&inp->sctp_queue_list);
1579 /* Init the timer structure for signature change */
1580 #if defined (__FreeBSD__) && __FreeBSD_version >= 500000
1581 callout_init(&inp->sctp_ep.signature_change.timer, 0);
1582 #else
1583 callout_init(&inp->sctp_ep.signature_change.timer);
1584 #endif
1585 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1586
1587 /* now init the actual endpoint default data */
1588 m = &inp->sctp_ep;
1589
1590 /* setup the base timeout information */
1591 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1592 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1593 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1594 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_heartbeat_interval_default; /* this is in MSEC */
1595 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1596 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1597 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1598 /* all max/min max are in ms */
1599 m->sctp_maxrto = sctp_rto_max_default;
1600 m->sctp_minrto = sctp_rto_min_default;
1601 m->initial_rto = sctp_rto_initial_default;
1602 m->initial_init_rto_max = sctp_init_rto_max_default;
1603
1604 m->max_open_streams_intome = MAX_SCTP_STREAMS;
1605
1606 m->max_init_times = sctp_init_rtx_max_default;
1607 m->max_send_times = sctp_assoc_rtx_max_default;
1608 m->def_net_failure = sctp_path_rtx_max_default;
1609 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1610 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1611 m->max_burst = sctp_max_burst_default;
1612 /* number of streams to pre-open on a association */
1613 m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1614
1615 /* Add adaption cookie */
1616 m->adaption_layer_indicator = 0x504C5253;
1617
1618 /* seed random number generator */
1619 m->random_counter = 1;
1620 m->store_at = SCTP_SIGNATURE_SIZE;
1621 #if (defined(__FreeBSD__) && (__FreeBSD_version < 500000)) || defined(__DragonFly__)
1622 read_random_unlimited(m->random_numbers, sizeof(m->random_numbers));
1623 #elif defined(__APPLE__) || (__FreeBSD_version > 500000)
1624 read_random(m->random_numbers, sizeof(m->random_numbers));
1625 #elif defined(__OpenBSD__)
1626 get_random_bytes(m->random_numbers, sizeof(m->random_numbers));
1627 #elif defined(__NetBSD__) && NRND > 0
1628 rnd_extract_data(m->random_numbers, sizeof(m->random_numbers),
1629 RND_EXTRACT_ANY);
1630 #else
1631 {
1632 u_int32_t *ranm, *ranp;
1633 ranp = (u_int32_t *)&m->random_numbers;
1634 ranm = ranp + (SCTP_SIGNATURE_ALOC_SIZE/sizeof(u_int32_t));
1635 if ((u_long)ranp % 4) {
1636 /* not a even boundary? */
1637 ranp = (u_int32_t *)SCTP_SIZE32((u_long)ranp);
1638 }
1639 while (ranp < ranm) {
1640 *ranp = random();
1641 ranp++;
1642 }
1643 }
1644 #endif
1645 sctp_fill_random_store(m);
1646
1647 /* Minimum cookie size */
1648 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1649 sizeof(struct sctp_state_cookie);
1650 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1651
1652 /* Setup the initial secret */
1653 SCTP_GETTIME_TIMEVAL(&time);
1654 m->time_of_secret_change = time.tv_sec;
1655
1656 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1657 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1658 }
1659 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1660
1661 /* How long is a cookie good for ? */
1662 m->def_cookie_life = sctp_valid_cookie_life_default;
1663 SCTP_INP_WUNLOCK(inp);
1664 return (error);
1665 }
1666
1667
1668 void
1669 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1670 struct sctp_tcb *stcb)
1671 {
1672 uint16_t lport, rport;
1673 struct sctppcbhead *head;
1674 struct sctp_laddr *laddr, *oladdr;
1675
1676 SCTP_TCB_UNLOCK(stcb);
1677 SCTP_INP_INFO_WLOCK();
1678 SCTP_INP_WLOCK(old_inp);
1679 SCTP_INP_WLOCK(new_inp);
1680 SCTP_TCB_LOCK(stcb);
1681
1682 new_inp->sctp_ep.time_of_secret_change =
1683 old_inp->sctp_ep.time_of_secret_change;
1684 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1685 sizeof(old_inp->sctp_ep.secret_key));
1686 new_inp->sctp_ep.current_secret_number =
1687 old_inp->sctp_ep.current_secret_number;
1688 new_inp->sctp_ep.last_secret_number =
1689 old_inp->sctp_ep.last_secret_number;
1690 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1691
1692 /* Copy the port across */
1693 lport = new_inp->sctp_lport = old_inp->sctp_lport;
1694 rport = stcb->rport;
1695 /* Pull the tcb from the old association */
1696 LIST_REMOVE(stcb, sctp_tcbhash);
1697 LIST_REMOVE(stcb, sctp_tcblist);
1698
1699 /* Now insert the new_inp into the TCP connected hash */
1700 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1701 sctppcbinfo.hashtcpmark)];
1702
1703 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1704
1705 /* Now move the tcb into the endpoint list */
1706 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1707 /*
1708 * Question, do we even need to worry about the ep-hash since
1709 * we only have one connection? Probably not :> so lets
1710 * get rid of it and not suck up any kernel memory in that.
1711 */
1712 SCTP_INP_INFO_WUNLOCK();
1713 stcb->sctp_socket = new_inp->sctp_socket;
1714 stcb->sctp_ep = new_inp;
1715 if (new_inp->sctp_tcbhash != NULL) {
1716 FREE(new_inp->sctp_tcbhash, M_PCB);
1717 new_inp->sctp_tcbhash = NULL;
1718 }
1719 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1720 /* Subset bound, so copy in the laddr list from the old_inp */
1721 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1722 laddr = (struct sctp_laddr *)SCTP_ZONE_GET(
1723 sctppcbinfo.ipi_zone_laddr);
1724 if (laddr == NULL) {
1725 /*
1726 * Gak, what can we do? This assoc is really
1727 * HOSED. We probably should send an abort
1728 * here.
1729 */
1730 #ifdef SCTP_DEBUG
1731 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1732 kprintf("Association hosed in TCP model, out of laddr memory\n");
1733 }
1734 #endif /* SCTP_DEBUG */
1735 continue;
1736 }
1737 sctppcbinfo.ipi_count_laddr++;
1738 sctppcbinfo.ipi_gencnt_laddr++;
1739 bzero(laddr, sizeof(*laddr));
1740 laddr->ifa = oladdr->ifa;
1741 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1742 sctp_nxt_addr);
1743 new_inp->laddr_count++;
1744 }
1745 }
1746 SCTP_INP_WUNLOCK(new_inp);
1747 SCTP_INP_WUNLOCK(old_inp);
1748 }
1749
1750 static int
1751 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport)
1752 {
1753 struct sctppcbhead *head;
1754 struct sctp_inpcb *t_inp;
1755
1756 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1757 sctppcbinfo.hashmark)];
1758 LIST_FOREACH(t_inp, head, sctp_hash) {
1759 if (t_inp->sctp_lport != lport) {
1760 continue;
1761 }
1762 /* This one is in use. */
1763 /* check the v6/v4 binding issue */
1764 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1765 #if defined(__FreeBSD__)
1766 (((struct inpcb *)t_inp)->inp_flags & IN6P_IPV6_V6ONLY)
1767 #else
1768 #if defined(__OpenBSD__)
1769 (0) /* For open bsd we do dual bind only */
1770 #else
1771 (((struct in6pcb *)t_inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1772 #endif
1773 #endif
1774 ) {
1775 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1776 /* collision in V6 space */
1777 return (1);
1778 } else {
1779 /* inp is BOUND_V4 no conflict */
1780 continue;
1781 }
1782 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1783 /* t_inp is bound v4 and v6, conflict always */
1784 return (1);
1785 } else {
1786 /* t_inp is bound only V4 */
1787 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1788 #if defined(__FreeBSD__)
1789 (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
1790 #else
1791 #if defined(__OpenBSD__)
1792 (0) /* For open bsd we do dual bind only */
1793 #else
1794 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1795 #endif
1796 #endif
1797 ) {
1798 /* no conflict */
1799 continue;
1800 }
1801 /* else fall through to conflict */
1802 }
1803 return (1);
1804 }
1805 return (0);
1806 }
1807
1808 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
1809 /*
1810 * Don't know why, but without this there is an unknown reference when
1811 * compiling NetBSD... hmm
1812 */
1813 extern void in6_sin6_2_sin (struct sockaddr_in *, struct sockaddr_in6 *sin6);
1814 #endif
1815
1816
1817 int
1818 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
1819 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1820 #else
1821 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct proc *p)
1822 #endif
1823 {
1824 /* bind a ep to a socket address */
1825 struct sctppcbhead *head;
1826 struct sctp_inpcb *inp, *inp_tmp;
1827 struct inpcb *ip_inp;
1828 int bindall;
1829 uint16_t lport;
1830 int error;
1831
1832 lport = 0;
1833 error = 0;
1834 bindall = 1;
1835 inp = (struct sctp_inpcb *)so->so_pcb;
1836 ip_inp = (struct inpcb *)so->so_pcb;
1837 #ifdef SCTP_DEBUG
1838 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1839 if (addr) {
1840 kprintf("Bind called port:%d\n",
1841 ntohs(((struct sockaddr_in *)addr)->sin_port));
1842 kprintf("Addr :");
1843 sctp_print_address(addr);
1844 }
1845 }
1846 #endif /* SCTP_DEBUG */
1847 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1848 /* already did a bind, subsequent binds NOT allowed ! */
1849 return (EINVAL);
1850 }
1851
1852 if (addr != NULL) {
1853 if (addr->sa_family == AF_INET) {
1854 struct sockaddr_in *sin;
1855
1856 /* IPV6_V6ONLY socket? */
1857 if (
1858 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
1859 (ip_inp->inp_flags & IN6P_IPV6_V6ONLY)
1860 #else
1861 #if defined(__OpenBSD__)
1862 (0) /* For openbsd we do dual bind only */
1863 #else
1864 (((struct in6pcb *)inp)->in6p_flags & IN6P_IPV6_V6ONLY)
1865 #endif
1866 #endif
1867 ) {
1868 return (EINVAL);
1869 }
1870
1871 if (addr->sa_len != sizeof(*sin))
1872 return (EINVAL);
1873
1874 sin = (struct sockaddr_in *)addr;
1875 lport = sin->sin_port;
1876
1877 if (sin->sin_addr.s_addr != INADDR_ANY) {
1878 bindall = 0;
1879 }
1880 } else if (addr->sa_family == AF_INET6) {
1881 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
1882 struct sockaddr_in6 *sin6;
1883
1884 sin6 = (struct sockaddr_in6 *)addr;
1885
1886 if (addr->sa_len != sizeof(*sin6))
1887 return (EINVAL);
1888
1889 lport = sin6->sin6_port;
1890 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1891 bindall = 0;
1892 /* KAME hack: embed scopeid */
1893 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
1894 if (in6_embedscope(&sin6->sin6_addr, sin6,
1895 ip_inp, NULL) != 0)
1896 return (EINVAL);
1897 #elif defined(__FreeBSD__)
1898 error = scope6_check_id(sin6, ip6_use_defzone);
1899 if (error != 0)
1900 return (error);
1901 #else
1902 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
1903 return (EINVAL);
1904 }
1905 #endif
1906 }
1907 #ifndef SCOPEDROUTING
1908 /* this must be cleared for ifa_ifwithaddr() */
1909 sin6->sin6_scope_id = 0;
1910 #endif /* SCOPEDROUTING */
1911 } else {
1912 return (EAFNOSUPPORT);
1913 }
1914 }
1915 SCTP_INP_INFO_WLOCK();
1916 SCTP_INP_WLOCK(inp);
1917 /* increase our count due to the unlock we do */
1918 SCTP_INP_INCR_REF(inp);
1919 if (lport) {
1920 /*
1921 * Did the caller specify a port? if so we must see if a
1922 * ep already has this one bound.
1923 */
1924 /* got to be root to get at low ports */
1925 if (ntohs(lport) < IPPORT_RESERVED) {
1926 if (p && (error =
1927 #ifdef __FreeBSD__
1928 #if __FreeBSD_version >= 500000
1929 suser_cred(p->td_ucred, 0)
1930 #else
1931 suser(p)
1932 #endif
1933 #elif defined(__NetBSD__) || defined(__APPLE__)
1934 suser(p->p_ucred, &p->p_acflag)
1935 #elif defined(__DragonFly__)
1936 suser(p)
1937 #else
1938 suser(p, 0)
1939 #endif
1940 )) {
1941 SCTP_INP_DECR_REF(inp);
1942 SCTP_INP_WUNLOCK(inp);
1943 SCTP_INP_INFO_WUNLOCK();
1944 return (error);
1945 }
1946 }
1947 if (p == NULL) {
1948 SCTP_INP_DECR_REF(inp);
1949 SCTP_INP_WUNLOCK(inp);
1950 SCTP_INP_INFO_WUNLOCK();
1951 return (error);
1952 }
1953 SCTP_INP_WUNLOCK(inp);
1954 inp_tmp = sctp_pcb_findep(addr, 0, 1);
1955 if (inp_tmp != NULL) {
1956 /* lock guy returned and lower count
1957 * note that we are not bound so inp_tmp
1958 * should NEVER be inp. And it is this
1959 * inp (inp_tmp) that gets the reference
1960 * bump, so we must lower it.
1961 */
1962 SCTP_INP_WLOCK(inp_tmp);
1963 SCTP_INP_DECR_REF(inp_tmp);
1964 SCTP_INP_WUNLOCK(inp_tmp);
1965
1966 /* unlock info */
1967 SCTP_INP_INFO_WUNLOCK();
1968 return (EADDRNOTAVAIL);
1969 }
1970 SCTP_INP_WLOCK(inp);
1971 if (bindall) {
1972 /* verify that no lport is not used by a singleton */
1973 if (sctp_isport_inuse(inp, lport)) {
1974 /* Sorry someone already has this one bound */
1975 SCTP_INP_DECR_REF(inp);
1976 SCTP_INP_WUNLOCK(inp);
1977 SCTP_INP_INFO_WUNLOCK();
1978 return (EADDRNOTAVAIL);
1979 }
1980 }
1981 } else {
1982 /*
1983 * get any port but lets make sure no one has any address
1984 * with this port bound
1985 */
1986
1987 /*
1988 * setup the inp to the top (I could use the union but this
1989 * is just as easy
1990 */
1991 uint32_t port_guess;
1992 uint16_t port_attempt;
1993 int not_done=1;
1994
1995 while (not_done) {
1996 port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
1997 port_attempt = (port_guess & 0x0000ffff);
1998 if (port_attempt == 0) {
1999 goto next_half;
2000 }
2001 if (port_attempt < IPPORT_RESERVED) {
2002 port_attempt += IPPORT_RESERVED;
2003 }
2004
2005 if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2006 /* got a port we can use */
2007 not_done = 0;
2008 continue;
2009 }
2010 /* try upper half */
2011 next_half:
2012 port_attempt = ((port_guess >> 16) & 0x0000ffff);
2013 if (port_attempt == 0) {
2014 goto last_try;
2015 }
2016 if (port_attempt < IPPORT_RESERVED) {
2017 port_attempt += IPPORT_RESERVED;
2018 }
2019 if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2020 /* got a port we can use */
2021 not_done = 0;
2022 continue;
2023 }
2024 /* try two half's added together */
2025 last_try:
2026 port_attempt = (((port_guess >> 16) & 0x0000ffff) + (port_guess & 0x0000ffff));
2027 if (port_attempt == 0) {
2028 /* get a new random number */
2029 continue;
2030 }
2031 if (port_attempt < IPPORT_RESERVED) {
2032 port_attempt += IPPORT_RESERVED;
2033 }
2034 if (sctp_isport_inuse(inp, htons(port_attempt)) == 0) {
2035 /* got a port we can use */
2036 not_done = 0;
2037 continue;
2038 }
2039 }
2040 /* we don't get out of the loop until we have a port */
2041 lport = htons(port_attempt);
2042 }
2043 SCTP_INP_DECR_REF(inp);
2044 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2045 /* this really should not happen. The guy
2046 * did a non-blocking bind and then did a close
2047 * at the same time.
2048 */
2049 SCTP_INP_WUNLOCK(inp);
2050 SCTP_INP_INFO_WUNLOCK();
2051 return (EINVAL);
2052 }
2053 /* ok we look clear to give out this port, so lets setup the binding */
2054 if (bindall) {
2055 /* binding to all addresses, so just set in the proper flags */
2056 inp->sctp_flags |= (SCTP_PCB_FLAGS_BOUNDALL |
2057 SCTP_PCB_FLAGS_DO_ASCONF);
2058 /* set the automatic addr changes from kernel flag */
2059 if (sctp_auto_asconf == 0) {
2060 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2061 } else {
2062 inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2063 }
2064 } else {
2065 /*
2066 * bind specific, make sure flags is off and add a new address
2067 * structure to the sctp_addr_list inside the ep structure.
2068 *
2069 * We will need to allocate one and insert it at the head.
2070 * The socketopt call can just insert new addresses in there
2071 * as well. It will also have to do the embed scope kame hack
2072 * too (before adding).
2073 */
2074 struct ifaddr *ifa;
2075 struct sockaddr_storage store_sa;
2076
2077 memset(&store_sa, 0, sizeof(store_sa));
2078 if (addr->sa_family == AF_INET) {
2079 struct sockaddr_in *sin;
2080
2081 sin = (struct sockaddr_in *)&store_sa;
2082 memcpy(sin, addr, sizeof(struct sockaddr_in));
2083 sin->sin_port = 0;
2084 } else if (addr->sa_family == AF_INET6) {
2085 struct sockaddr_in6 *sin6;
2086
2087 sin6 = (struct sockaddr_in6 *)&store_sa;
2088 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2089 sin6->sin6_port = 0;
2090 }
2091 /*
2092 * first find the interface with the bound address
2093 * need to zero out the port to find the address! yuck!
2094 * can't do this earlier since need port for sctp_pcb_findep()
2095 */
2096 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa);
2097 if (ifa == NULL) {
2098 /* Can't find an interface with that address */
2099 SCTP_INP_WUNLOCK(inp);
2100 SCTP_INP_INFO_WUNLOCK();
2101 return (EADDRNOTAVAIL);
2102 }
2103 if (addr->sa_family == AF_INET6) {
2104 struct in6_ifaddr *ifa6;
2105 ifa6 = (struct in6_ifaddr *)ifa;
2106 /*
2107 * allow binding of deprecated addresses as per
2108 * RFC 2462 and ipng discussion
2109 */
2110 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
2111 IN6_IFF_ANYCAST |
2112 IN6_IFF_NOTREADY)) {
2113 /* Can't bind a non-existent addr. */
2114 SCTP_INP_WUNLOCK(inp);
2115 SCTP_INP_INFO_WUNLOCK();
2116 return (EINVAL);
2117 }
2118 }
2119 /* we're not bound all */
2120 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2121 #if 0 /* use sysctl now */
2122 /* don't allow automatic addr changes from kernel */
2123 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2124 #endif
2125 /* set the automatic addr changes from kernel flag */
2126 if (sctp_auto_asconf == 0) {
2127 inp->sctp_flags &= ~SCTP_PCB_FLAGS_AUTO_ASCONF;
2128 } else {
2129 inp->sctp_flags |= SCTP_PCB_FLAGS_AUTO_ASCONF;
2130 }
2131 /* allow bindx() to send ASCONF's for binding changes */
2132 inp->sctp_flags |= SCTP_PCB_FLAGS_DO_ASCONF;
2133 /* add this address to the endpoint list */
2134 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
2135 if (error != 0) {
2136 SCTP_INP_WUNLOCK(inp);
2137 SCTP_INP_INFO_WUNLOCK();
2138 return (error);
2139 }
2140 inp->laddr_count++;
2141 }
2142 /* find the bucket */
2143 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2144 sctppcbinfo.hashmark)];
2145 /* put it in the bucket */
2146 LIST_INSERT_HEAD(head, inp, sctp_hash);
2147 #ifdef SCTP_DEBUG
2148 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2149 kprintf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2150 }
2151 #endif
2152 /* set in the port */
2153 inp->sctp_lport = lport;
2154
2155 /* turn off just the unbound flag */
2156 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2157 SCTP_INP_WUNLOCK(inp);
2158 SCTP_INP_INFO_WUNLOCK();
2159 return (0);
2160 }
2161
2162
2163 static void
2164 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2165 {
2166 struct sctp_iterator *it;
2167 /* We enter with the only the ITERATOR_LOCK in place and
2168 * A write lock on the inp_info stuff.
2169 */
2170
2171 /* Go through all iterators, we must do this since
2172 * it is possible that some iterator does NOT have
2173 * the lock, but is waiting for it. And the one that
2174 * had the lock has either moved in the last iteration
2175 * or we just cleared it above. We need to find all
2176 * of those guys. The list of iterators should never
2177 * be very big though.
2178 */
2179 LIST_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2180 if (it == inp->inp_starting_point_for_iterator)
2181 /* skip this guy, he's special */
2182 continue;
2183 if (it->inp == inp) {
2184 /* This is tricky and we DON'T lock the iterator.
2185 * Reason is he's running but waiting for me since
2186 * inp->inp_starting_point_for_iterator has the lock
2187 * on me (the guy above we skipped). This tells us
2188 * its is not running but waiting for inp->inp_starting_point_for_iterator
2189 * to be released by the guy that does have our INP in a lock.
2190 */
2191 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2192 it->inp = NULL;
2193 it->stcb = NULL;
2194 } else {
2195 /* set him up to do the next guy not me */
2196 it->inp = inp_next;
2197 it->stcb = NULL;
2198 }
2199 }
2200 }
2201 it = inp->inp_starting_point_for_iterator;
2202 if (it) {
2203 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2204 it->inp = NULL;
2205 } else {
2206 it->inp = inp_next;
2207 }
2208 it->stcb = NULL;
2209 }
2210 }
2211
2212 /* release sctp_inpcb unbind the port */
2213 void
2214 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate)
2215 {
2216 /*
2217 * Here we free a endpoint. We must find it (if it is in the Hash
2218 * table) and remove it from there. Then we must also find it in
2219 * the overall list and remove it from there. After all removals are
2220 * complete then any timer has to be stopped. Then start the actual
2221 * freeing.
2222 * a) Any local lists.
2223 * b) Any associations.
2224 * c) The hash of all associations.
2225 * d) finally the ep itself.
2226 */
2227 struct sctp_pcb *m;
2228 struct sctp_inpcb *inp_save;
2229 struct sctp_tcb *asoc, *nasoc;
2230 struct sctp_laddr *laddr, *nladdr;
2231 struct inpcb *ip_pcb;
2232 struct socket *so;
2233 struct sctp_socket_q_list *sq;
2234 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2235 struct rtentry *rt;
2236 #endif
2237 int cnt;
2238
2239 crit_enter();
2240 SCTP_ASOC_CREATE_LOCK(inp);
2241 SCTP_INP_WLOCK(inp);
2242
2243 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2244 /* been here before */
2245 crit_exit();
2246 kprintf("Endpoint was all gone (dup free)?\n");
2247 SCTP_INP_WUNLOCK(inp);
2248 SCTP_ASOC_CREATE_UNLOCK(inp);
2249 return;
2250 }
2251 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2252
2253 if (inp->control) {
2254 sctp_m_freem(inp->control);
2255 inp->control = NULL;
2256 }
2257 if (inp->pkt) {
2258 sctp_m_freem(inp->pkt);
2259 inp->pkt = NULL;
2260 }
2261 so = inp->sctp_socket;
2262 m = &inp->sctp_ep;
2263 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main
2264 * pointer here but I will
2265 * be nice :> (i.e. ip_pcb = ep;)
2266 */
2267
2268 if (immediate == 0) {
2269 int cnt_in_sd;
2270 cnt_in_sd = 0;
2271 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2272 asoc = nasoc) {
2273 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2274 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2275 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2276 /* Just abandon things in the front states */
2277 SCTP_TCB_LOCK(asoc);
2278 SCTP_INP_WUNLOCK(inp);
2279 sctp_free_assoc(inp, asoc);
2280 SCTP_INP_WLOCK(inp);
2281 continue;
2282 } else {
2283 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2284 }
2285 if ((asoc->asoc.size_on_delivery_queue > 0) ||
2286 (asoc->asoc.size_on_reasm_queue > 0) ||
2287 (asoc->asoc.size_on_all_streams > 0) ||
2288 (so && (so->so_rcv.ssb_cc > 0))
2289 ) {
2290 /* Left with Data unread */
2291 struct mbuf *op_err;
2292 MGET(op_err, MB_DONTWAIT, MT_DATA);
2293 if (op_err) {
2294 /* Fill in the user initiated abort */
2295 struct sctp_paramhdr *ph;
2296 op_err->m_len =
2297 sizeof(struct sctp_paramhdr);
2298 ph = mtod(op_err,
2299 struct sctp_paramhdr *);
2300 ph->param_type = htons(
2301 SCTP_CAUSE_USER_INITIATED_ABT);
2302 ph->param_length = htons(op_err->m_len);
2303 }
2304 SCTP_TCB_LOCK(asoc);
2305 sctp_send_abort_tcb(asoc, op_err);
2306
2307 SCTP_INP_WUNLOCK(inp);
2308 sctp_free_assoc(inp, asoc);
2309 SCTP_INP_WLOCK(inp);
2310 continue;
2311 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2312 TAILQ_EMPTY(&asoc->asoc.sent_queue)) {
2313 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2314 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2315 /* there is nothing queued to send, so I send shutdown */
2316 SCTP_TCB_LOCK(asoc);
2317 sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2318 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2319 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2320 asoc->asoc.primary_destination);
2321 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2322 asoc->asoc.primary_destination);
2323 sctp_chunk_output(inp, asoc, 1);
2324 SCTP_TCB_UNLOCK(asoc);
2325 }
2326 } else {
2327 /* mark into shutdown pending */
2328 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2329 }
2330 cnt_in_sd++;
2331 }
2332 /* now is there some left in our SHUTDOWN state? */
2333 if (cnt_in_sd) {
2334 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_GONE;
2335 crit_exit();
2336 SCTP_INP_WUNLOCK(inp);
2337 SCTP_ASOC_CREATE_UNLOCK(inp);
2338 return;
2339 }
2340 }
2341 #if defined(__FreeBSD__) && __FreeBSD_version >= 503000
2342 if (inp->refcount) {
2343 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2344 SCTP_INP_WUNLOCK(inp);
2345 SCTP_ASOC_CREATE_UNLOCK(inp);
2346 return;
2347 }
2348 #endif
2349 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2350 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2351 rt = ip_pcb->inp_route.ro_rt;
2352 #endif
2353
2354 callout_stop(&inp->sctp_ep.signature_change.timer);
2355
2356 if (so) {
2357 /* First take care of socket level things */
2358 #ifdef IPSEC
2359 #ifdef __OpenBSD__
2360 /* XXX IPsec cleanup here */
2361 crit_enter();
2362 if (ip_pcb->inp_tdb_in)
2363 TAILQ_REMOVE(&ip_pcb->inp_tdb_in->tdb_inp_in,
2364 ip_pcb, inp_tdb_in_next);
2365 if (ip_pcb->inp_tdb_out)
2366 TAILQ_REMOVE(&ip_pcb->inp_tdb_out->tdb_inp_out, ip_pcb,
2367 inp_tdb_out_next);
2368 if (ip_pcb->inp_ipsec_localid)
2369 ipsp_reffree(ip_pcb->inp_ipsec_localid);
2370 if (ip_pcb->inp_ipsec_remoteid)
2371 ipsp_reffree(ip_pcb->inp_ipsec_remoteid);
2372 if (ip_pcb->inp_ipsec_localcred)
2373 ipsp_reffree(ip_pcb->inp_ipsec_localcred);
2374 if (ip_pcb->inp_ipsec_remotecred)
2375 ipsp_reffree(ip_pcb->inp_ipsec_remotecred);
2376 if (ip_pcb->inp_ipsec_localauth)
2377 ipsp_reffree(ip_pcb->inp_ipsec_localauth);
2378 if (ip_pcb->inp_ipsec_remoteauth)
2379 ipsp_reffree(ip_pcb->inp_ipsec_remoteauth);
2380 crit_exit();
2381 #else
2382 ipsec4_delete_pcbpolicy(ip_pcb);
2383 #endif
2384 #endif /*IPSEC*/
2385 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2386 ACCEPT_LOCK();
2387 SOCK_LOCK(so);
2388 #endif
2389 so->so_pcb = 0;
2390 #if defined(__FreeBSD__) && __FreeBSD_version > 500000
2391 sotryfree(so);
2392 #else
2393 sofree(so);
2394 #endif
2395 }
2396
2397 if (ip_pcb->inp_options) {
2398 m_free(ip_pcb->inp_options);
2399 ip_pcb->inp_options = 0;
2400 }
2401 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
2402 if (rt) {
2403 RTFREE(rt);
2404 ip_pcb->inp_route.ro_rt = 0;
2405 }
2406 #endif
2407 if (ip_pcb->inp_moptions) {
2408 ip_freemoptions(ip_pcb->inp_moptions);
2409 ip_pcb->inp_moptions = 0;
2410 }
2411 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
2412 inp->inp_vflag = 0;
2413 #else
2414 ip_pcb->inp_vflag = 0;
2415 #endif
2416
2417 /* Now the sctp_pcb things */
2418
2419 /*
2420 * free each asoc if it is not already closed/free. we can't use
2421 * the macro here since le_next will get freed as part of the
2422 * sctp_free_assoc() call.
2423 */
2424 cnt = 0;
2425 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2426 asoc = nasoc) {
2427 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2428 SCTP_TCB_LOCK(asoc);
2429 if (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) {
2430 struct mbuf *op_err;
2431 MGET(op_err, MB_DONTWAIT, MT_DATA);
2432 if (op_err) {
2433 /* Fill in the user initiated abort */
2434 struct sctp_paramhdr *ph;
2435 op_err->m_len = sizeof(struct sctp_paramhdr);
2436 ph = mtod(op_err, struct sctp_paramhdr *);
2437 ph->param_type = htons(
2438 SCTP_CAUSE_USER_INITIATED_ABT);
2439 ph->param_length = htons(op_err->m_len);
2440 }
2441 sctp_send_abort_tcb(asoc, op_err);
2442 }
2443 cnt++;
2444 /*
2445 * sctp_free_assoc() will call sctp_inpcb_free(),
2446 * if SCTP_PCB_FLAGS_SOCKET_GONE set.
2447 * So, we clear it before sctp_free_assoc() making sure
2448 * no double sctp_inpcb_free().
2449 */
2450 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SOCKET_GONE;
2451 SCTP_INP_WUNLOCK(inp);
2452 sctp_free_assoc(inp, asoc);
2453 SCTP_INP_WLOCK(inp);
2454 }
2455 while ((sq = TAILQ_FIRST(&inp->sctp_queue_list)) != NULL) {
2456 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
2457 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
2458 sctppcbinfo.ipi_count_sockq--;
2459 sctppcbinfo.ipi_gencnt_sockq++;
2460 }
2461 inp->sctp_socket = 0;
2462 /* Now first we remove ourselves from the overall list of all EP's */
2463
2464 /* Unlock inp first, need correct order */
2465 SCTP_INP_WUNLOCK(inp);
2466 /* now iterator lock */
2467 SCTP_ITERATOR_LOCK();
2468 /* now info lock */
2469 SCTP_INP_INFO_WLOCK();
2470 /* now reget the inp lock */
2471 SCTP_INP_WLOCK(inp);
2472
2473 inp_save = LIST_NEXT(inp, sctp_list);
2474 LIST_REMOVE(inp, sctp_list);
2475 /*
2476 * Now the question comes as to if this EP was ever bound at all.
2477 * If it was, then we must pull it out of the EP hash list.
2478 */
2479 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2480 SCTP_PCB_FLAGS_UNBOUND) {
2481 /*
2482 * ok, this guy has been bound. It's port is somewhere
2483 * in the sctppcbinfo hash table. Remove it!
2484 */
2485 LIST_REMOVE(inp, sctp_hash);
2486 }
2487 /* fix any iterators only after out of the list */
2488 sctp_iterator_inp_being_freed(inp, inp_save);
2489 SCTP_ITERATOR_UNLOCK();
2490 /*
2491 * if we have an address list the following will free the list of
2492 * ifaddr's that are set into this ep. Again macro limitations here,
2493 * since the LIST_FOREACH could be a bad idea.
2494 */
2495 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2496 laddr = nladdr) {
2497 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2498 LIST_REMOVE(laddr, sctp_nxt_addr);
2499 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
2500 sctppcbinfo.ipi_gencnt_laddr++;
2501 sctppcbinfo.ipi_count_laddr--;
2502 }
2503 /* Now lets see about freeing the EP hash table. */
2504 if (inp->sctp_tcbhash != NULL) {
2505 FREE(inp->sctp_tcbhash, M_PCB);
2506 inp->sctp_tcbhash = 0;
2507 }
2508 SCTP_INP_WUNLOCK(inp);
2509 SCTP_ASOC_CREATE_UNLOCK(inp);
2510 SCTP_INP_LOCK_DESTROY(inp);
2511 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2512
2513 /* Now we must put the ep memory back into the zone pool */
2514 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2515 sctppcbinfo.ipi_count_ep--;
2516
2517 SCTP_INP_INFO_WUNLOCK();
2518 crit_exit();
2519 }
2520
2521
2522 struct sctp_nets *
2523 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2524 {
2525 struct sctp_nets *net;
2526 struct sockaddr_in *sin;
2527 struct sockaddr_in6 *sin6;
2528 /* use the peer's/remote port for lookup if unspecified */
2529 sin = (struct sockaddr_in *)addr;
2530 sin6 = (struct sockaddr_in6 *)addr;
2531 #if 0 /* why do we need to check the port for a nets list on an assoc? */
2532 if (stcb->rport != sin->sin_port) {
2533 /* we cheat and just a sin for this test */
2534 return (NULL);
2535 }
2536 #endif
2537 /* locate the address */
2538 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2539 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2540 return (net);
2541 }
2542 return (NULL);
2543 }
2544
2545
2546 /*
2547 * add's a remote endpoint address, done with the INIT/INIT-ACK
2548 * as well as when a ASCONF arrives that adds it. It will also
2549 * initialize all the cwnd stats of stuff.
2550 */
2551 int
2552 sctp_is_address_on_local_host(struct sockaddr *addr)
2553 {
2554 struct ifnet *ifn;
2555 struct ifaddr *ifa;
2556 TAILQ_FOREACH(ifn, &ifnet, if_list) {
2557 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
2558 if (addr->sa_family == ifa->ifa_addr->sa_family) {
2559 /* same family */
2560 if (addr->sa_family == AF_INET) {
2561 struct sockaddr_in *sin, *sin_c;
2562 sin = (struct sockaddr_in *)addr;
2563 sin_c = (struct sockaddr_in *)
2564 ifa->ifa_addr;
2565 if (sin->sin_addr.s_addr ==
2566 sin_c->sin_addr.s_addr) {
2567 /* we are on the same machine */
2568 return (1);
2569 }
2570 } else if (addr->sa_family == AF_INET6) {
2571 struct sockaddr_in6 *sin6, *sin_c6;
2572 sin6 = (struct sockaddr_in6 *)addr;
2573 sin_c6 = (struct sockaddr_in6 *)
2574 ifa->ifa_addr;
2575 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
2576 &sin_c6->sin6_addr)) {
2577 /* we are on the same machine */
2578 return (1);
2579 }
2580 }
2581 }
2582 }
2583 }
2584 return (0);
2585 }
2586
2587 int
2588 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2589 int set_scope, int from)
2590 {
2591 /*
2592 * The following is redundant to the same lines in the
2593 * sctp_aloc_assoc() but is needed since other's call the add
2594 * address function
2595 */
2596 struct sctp_nets *net, *netfirst;
2597 int addr_inscope;
2598
2599 #ifdef SCTP_DEBUG
2600 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2601 kprintf("Adding an address (from:%d) to the peer: ", from);
2602 sctp_print_address(newaddr);
2603 }
2604 #endif
2605 netfirst = sctp_findnet(stcb, newaddr);
2606 if (netfirst) {
2607 /*
2608 * Lie and return ok, we don't want to make the association
2609 * go away for this behavior. It will happen in the TCP model
2610 * in a connected socket. It does not reach the hash table
2611 * until after the association is built so it can't be found.
2612 * Mark as reachable, since the initial creation will have
2613 * been cleared and the NOT_IN_ASSOC flag will have been
2614 * added... and we don't want to end up removing it back out.
2615 */
2616 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2617 netfirst->dest_state = (SCTP_ADDR_REACHABLE|
2618 SCTP_ADDR_UNCONFIRMED);
2619 } else {
2620 netfirst->dest_state = SCTP_ADDR_REACHABLE;
2621 }
2622
2623 return (0);
2624 }
2625 addr_inscope = 1;
2626 if (newaddr->sa_family == AF_INET) {
2627 struct sockaddr_in *sin;
2628 sin = (struct sockaddr_in *)newaddr;
2629 if (sin->sin_addr.s_addr == 0) {
2630 /* Invalid address */
2631 return (-1);
2632 }
2633 /* zero out the bzero area */
2634 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2635
2636 /* assure len is set */
2637 sin->sin_len = sizeof(struct sockaddr_in);
2638 if (set_scope) {
2639 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2640 stcb->ipv4_local_scope = 1;
2641 #else
2642 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2643 stcb->asoc.ipv4_local_scope = 1;
2644 }
2645 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2646
2647 if (sctp_is_address_on_local_host(newaddr)) {
2648 stcb->asoc.loopback_scope = 1;
2649 stcb->asoc.ipv4_local_scope = 1;
2650 stcb->asoc.local_scope = 1;
2651 stcb->asoc.site_scope = 1;
2652 }
2653 } else {
2654 if (from == 8) {
2655 /* From connectx */
2656 if (sctp_is_address_on_local_host(newaddr)) {
2657 stcb->asoc.loopback_scope = 1;
2658 stcb->asoc.ipv4_local_scope = 1;
2659 stcb->asoc.local_scope = 1;
2660 stcb->asoc.site_scope = 1;
2661 }
2662 }
2663 /* Validate the address is in scope */
2664 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2665 (stcb->asoc.ipv4_local_scope == 0)) {
2666 addr_inscope = 0;
2667 }
2668 }
2669 } else if (newaddr->sa_family == AF_INET6) {
2670 struct sockaddr_in6 *sin6;
2671 sin6 = (struct sockaddr_in6 *)newaddr;
2672 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2673 /* Invalid address */
2674 return (-1);
2675 }
2676 /* assure len is set */
2677 sin6->sin6_len = sizeof(struct sockaddr_in6);
2678 if (set_scope) {
2679 if (sctp_is_address_on_local_host(newaddr)) {
2680 stcb->asoc.loopback_scope = 1;
2681 stcb->asoc.local_scope = 1;
2682 stcb->asoc.ipv4_local_scope = 1;
2683 stcb->asoc.site_scope = 1;
2684 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2685 /*
2686 * If the new destination is a LINK_LOCAL
2687 * we must have common site scope. Don't set
2688 * the local scope since we may not share all
2689 * links, only loopback can do this.
2690 * Links on the local network would also
2691 * be on our private network for v4 too.
2692 */
2693 stcb->asoc.ipv4_local_scope = 1;
2694 stcb->asoc.site_scope = 1;
2695 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2696 /*
2697 * If the new destination is SITE_LOCAL
2698 * then we must have site scope in common.
2699 */
2700 stcb->asoc.site_scope = 1;
2701 }
2702 } else {
2703 if (from == 8) {
2704 /* From connectx */
2705 if (sctp_is_address_on_local_host(newaddr)) {
2706 stcb->asoc.loopback_scope = 1;
2707 stcb->asoc.ipv4_local_scope = 1;
2708 stcb->asoc.local_scope = 1;
2709 stcb->asoc.site_scope = 1;
2710 }
2711 }
2712 /* Validate the address is in scope */
2713 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2714 (stcb->asoc.loopback_scope == 0)) {
2715 addr_inscope = 0;
2716 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2717 (stcb->asoc.local_scope == 0)) {
2718 addr_inscope = 0;
2719 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2720 (stcb->asoc.site_scope == 0)) {
2721 addr_inscope = 0;
2722 }
2723 }
2724 } else {
2725 /* not supported family type */
2726 return (-1);
2727 }
2728 net = (struct sctp_nets *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net);
2729 if (net == NULL) {
2730 return (-1);
2731 }
2732 sctppcbinfo.ipi_count_raddr++;
2733 sctppcbinfo.ipi_gencnt_raddr++;
2734 bzero(net, sizeof(*net));
2735 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2736 if (newaddr->sa_family == AF_INET) {
2737 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2738 } else if (newaddr->sa_family == AF_INET6) {
2739 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2740 }
2741 net->addr_is_local = sctp_is_address_on_local_host(newaddr);
2742 net->failure_threshold = stcb->asoc.def_net_failure;
2743 if (addr_inscope == 0) {
2744 #ifdef SCTP_DEBUG
2745 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2746 kprintf("Adding an address which is OUT OF SCOPE\n");
2747 }
2748 #endif /* SCTP_DEBUG */
2749 net->dest_state = (SCTP_ADDR_REACHABLE |
2750 SCTP_ADDR_OUT_OF_SCOPE);
2751 } else {
2752 if (from == 8)
2753 /* 8 is passed by connect_x */
2754 net->dest_state = SCTP_ADDR_REACHABLE;
2755 else
2756 net->dest_state = SCTP_ADDR_REACHABLE |
2757 SCTP_ADDR_UNCONFIRMED;
2758 }
2759 net->RTO = stcb->asoc.initial_rto;
2760 stcb->asoc.numnets++;
2761 net->ref_count = 1;
2762
2763 /* Init the timer structure */
2764 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2765 callout_init(&net->rxt_timer.timer, 0);
2766 callout_init(&net->pmtu_timer.timer, 0);
2767 #else
2768 callout_init(&net->rxt_timer.timer);
2769 callout_init(&net->pmtu_timer.timer);
2770 #endif
2771
2772 /* Now generate a route for this guy */
2773 /* KAME hack: embed scopeid */
2774 if (newaddr->sa_family == AF_INET6) {
2775 struct sockaddr_in6 *sin6;
2776 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2777 #if defined(SCTP_BASE_FREEBSD) || defined(__APPLE__) || defined(__DragonFly__)
2778 in6_embedscope(&sin6->sin6_addr, sin6,
2779 &stcb->sctp_ep->ip_inp.inp, NULL);
2780 #else
2781 in6_embedscope(&sin6->sin6_addr, sin6);
2782 #endif
2783 #ifndef SCOPEDROUTING
2784 sin6->sin6_scope_id = 0;
2785 #endif
2786 }
2787 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
2788 rtalloc_ign((struct route *)&net->ro, 0UL);
2789 #else
2790 rtalloc((struct route *)&net->ro);
2791 #endif
2792 if (newaddr->sa_family == AF_INET6) {
2793 struct sockaddr_in6 *sin6;
2794 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
2795 in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
2796 }
2797 if ((net->ro.ro_rt) &&
2798 (net->ro.ro_rt->rt_ifp)) {
2799 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2800 if (from == 1) {
2801 stcb->asoc.smallest_mtu = net->mtu;
2802 }
2803 /* start things off to match mtu of interface please. */
2804 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
2805 } else {
2806 net->mtu = stcb->asoc.smallest_mtu;
2807 }
2808 if (stcb->asoc.smallest_mtu > net->mtu) {
2809 stcb->asoc.smallest_mtu = net->mtu;
2810 }
2811 /* We take the max of the burst limit times a MTU or the INITIAL_CWND.
2812 * We then limit this to 4 MTU's of sending.
2813 */
2814 net->cwnd = min((net->mtu * 4), max((stcb->asoc.max_burst * net->mtu), SCTP_INITIAL_CWND));
2815
2816 /* we always get at LEAST 2 MTU's */
2817 if (net->cwnd < (2 * net->mtu)) {
2818 net->cwnd = 2 * net->mtu;
2819 }
2820
2821 net->ssthresh = stcb->asoc.peers_rwnd;
2822
2823 net->src_addr_selected = 0;
2824 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
2825 if (net->ro.ro_rt == NULL) {
2826 /* Since we have no route put it at the back */
2827 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
2828 } else if (netfirst == NULL) {
2829 /* We are the first one in the pool. */
2830 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2831 } else if (netfirst->ro.ro_rt == NULL) {
2832 /*
2833 * First one has NO route. Place this one ahead of the
2834 * first one.
2835 */
2836 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2837 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
2838 /*
2839 * This one has a different interface than the one at the
2840 * top of the list. Place it ahead.
2841 */
2842 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
2843 } else {
2844 /*
2845 * Ok we have the same interface as the first one. Move
2846 * forward until we find either
2847 * a) one with a NULL route... insert ahead of that
2848 * b) one with a different ifp.. insert after that.
2849 * c) end of the list.. insert at the tail.
2850 */
2851 struct sctp_nets *netlook;
2852 do {
2853 netlook = TAILQ_NEXT(netfirst, sctp_next);
2854 if (netlook == NULL) {
2855 /* End of the list */
2856 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net,
2857 sctp_next);
2858 break;
2859 } else if (netlook->ro.ro_rt == NULL) {
2860 /* next one has NO route */
2861 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
2862 break;
2863 } else if (netlook->ro.ro_rt->rt_ifp !=
2864 net->ro.ro_rt->rt_ifp) {
2865 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
2866 net, sctp_next);
2867 break;
2868 }
2869 /* Shift forward */
2870 netfirst = netlook;
2871 } while (netlook != NULL);
2872 }
2873 /* got to have a primary set */
2874 if (stcb->asoc.primary_destination == 0) {
2875 stcb->asoc.primary_destination = net;
2876 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
2877 (net->ro.ro_rt)) {
2878 /* No route to current primary adopt new primary */
2879 stcb->asoc.primary_destination = net;
2880 }
2881 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
2882 net);
2883
2884 return (0);
2885 }
2886
2887
2888 /*
2889 * allocate an association and add it to the endpoint. The caller must
2890 * be careful to add all additional addresses once they are know right
2891 * away or else the assoc will be may experience a blackout scenario.
2892 */
2893 struct sctp_tcb *
2894 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
2895 int for_a_init, int *error, uint32_t override_tag)
2896 {
2897 struct sctp_tcb *stcb;
2898 struct sctp_association *asoc;
2899 struct sctpasochead *head;
2900 uint16_t rport;
2901 int err;
2902
2903 /*
2904 * Assumption made here:
2905 * Caller has done a sctp_findassociation_ep_addr(ep, addr's);
2906 * to make sure the address does not exist already.
2907 */
2908 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
2909 /* Hit max assoc, sorry no more */
2910 *error = ENOBUFS;
2911 return (NULL);
2912 }
2913 SCTP_INP_RLOCK(inp);
2914 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2915 /*
2916 * If its in the TCP pool, its NOT allowed to create an
2917 * association. The parent listener needs to call
2918 * sctp_aloc_assoc.. or the one-2-many socket. If a
2919 * peeled off, or connected one does this.. its an error.
2920 */
2921 SCTP_INP_RUNLOCK(inp);
2922 *error = EINVAL;
2923 return (NULL);
2924 }
2925
2926 #ifdef SCTP_DEBUG
2927 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2928 kprintf("Allocate an association for peer:");
2929 if (firstaddr)
2930 sctp_print_address(firstaddr);
2931 else
2932 kprintf("None\n");
2933 kprintf("Port:%d\n",
2934 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
2935 }
2936 #endif /* SCTP_DEBUG */
2937 if (firstaddr->sa_family == AF_INET) {
2938 struct sockaddr_in *sin;
2939 sin = (struct sockaddr_in *)firstaddr;
2940 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
2941 /* Invalid address */
2942 #ifdef SCTP_DEBUG
2943 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2944 kprintf("peer address invalid\n");
2945 }
2946 #endif
2947 SCTP_INP_RUNLOCK(inp);
2948 *error = EINVAL;
2949 return (NULL);
2950 }
2951 rport = sin->sin_port;
2952 } else if (firstaddr->sa_family == AF_INET6) {
2953 struct sockaddr_in6 *sin6;
2954 sin6 = (struct sockaddr_in6 *)firstaddr;
2955 if ((sin6->sin6_port == 0) ||
2956 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
2957 /* Invalid address */
2958 #ifdef SCTP_DEBUG
2959 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2960 kprintf("peer address invalid\n");
2961 }
2962 #endif
2963 SCTP_INP_RUNLOCK(inp);
2964 *error = EINVAL;
2965 return (NULL);
2966 }
2967 rport = sin6->sin6_port;
2968 } else {
2969 /* not supported family type */
2970 #ifdef SCTP_DEBUG
2971 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2972 kprintf("BAD family %d\n", firstaddr->sa_family);
2973 }
2974 #endif
2975 SCTP_INP_RUNLOCK(inp);
2976 *error = EINVAL;
2977 return (NULL);
2978 }
2979 SCTP_INP_RUNLOCK(inp);
2980 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
2981 /*
2982 * If you have not performed a bind, then we need to do
2983 * the ephemerial bind for you.
2984 */
2985 #ifdef SCTP_DEBUG
2986 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
2987 kprintf("Doing implicit BIND\n");
2988 }
2989 #endif
2990
2991 if ((err = sctp_inpcb_bind(inp->sctp_socket,
2992 (struct sockaddr *)NULL,
2993 #if (defined(__FreeBSD__) && __FreeBSD_version >= 500000) || defined(__DragonFly__)
2994 (struct thread *)NULL
2995 #else
2996 (struct proc *)NULL
2997 #endif
2998 ))){
2999 /* bind error, probably perm */
3000 #ifdef SCTP_DEBUG
3001 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3002 kprintf("BIND FAILS ret:%d\n", err);
3003 }
3004 #endif
3005
3006 *error = err;
3007 return (NULL);
3008 }
3009 }
3010 stcb = (struct sctp_tcb *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc);
3011 if (stcb == NULL) {
3012 /* out of memory? */
3013 #ifdef SCTP_DEBUG
3014 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3015 kprintf("aloc_assoc: no assoc mem left, stcb=NULL\n");
3016 }
3017 #endif
3018 *error = ENOMEM;
3019 return (NULL);
3020 }
3021 sctppcbinfo.ipi_count_asoc++;
3022 sctppcbinfo.ipi_gencnt_asoc++;
3023
3024 bzero(stcb, sizeof(*stcb));
3025 asoc = &stcb->asoc;
3026 SCTP_TCB_LOCK_INIT(stcb);
3027 /* setup back pointer's */
3028 stcb->sctp_ep = inp;
3029 stcb->sctp_socket = inp->sctp_socket;
3030 if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag))) {
3031 /* failed */
3032 SCTP_TCB_LOCK_DESTROY (stcb);
3033 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3034 sctppcbinfo.ipi_count_asoc--;
3035 #ifdef SCTP_DEBUG
3036 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3037 kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3038 }
3039 #endif
3040 *error = err;
3041 return (NULL);
3042 }
3043 /* and the port */
3044 stcb->rport = rport;
3045 SCTP_INP_INFO_WLOCK();
3046 SCTP_INP_WLOCK(inp);
3047 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3048 /* inpcb freed while alloc going on */
3049 SCTP_TCB_LOCK_DESTROY (stcb);
3050 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3051 SCTP_INP_WUNLOCK(inp);
3052 SCTP_INP_INFO_WUNLOCK();
3053 sctppcbinfo.ipi_count_asoc--;
3054 #ifdef SCTP_DEBUG
3055 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3056 kprintf("aloc_assoc: couldn't init asoc, out of mem?!\n");
3057 }
3058 #endif
3059 *error = EINVAL;
3060 return (NULL);
3061 }
3062 SCTP_TCB_LOCK(stcb);
3063
3064 /* now that my_vtag is set, add it to the hash */
3065 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3066 sctppcbinfo.hashasocmark)];
3067 /* put it in the bucket in the vtag hash of assoc's for the system */
3068 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3069 SCTP_INP_INFO_WUNLOCK();
3070
3071
3072 if ((err = sctp_add_remote_addr(stcb, firstaddr, 1, 1))) {
3073 /* failure.. memory error? */
3074 if (asoc->strmout)
3075 FREE(asoc->strmout, M_PCB);
3076 if (asoc->mapping_array)
3077 FREE(asoc->mapping_array, M_PCB);
3078
3079 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3080 sctppcbinfo.ipi_count_asoc--;
3081 #ifdef SCTP_DEBUG
3082 if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3083 kprintf("aloc_assoc: couldn't add remote addr!\n");
3084 }
3085 #endif
3086 SCTP_TCB_LOCK_DESTROY (stcb);
3087 *error = ENOBUFS;
3088 return (NULL);
3089 }
3090 /* Init all the timers */
3091 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3092 callout_init(&asoc->hb_timer.timer, 0);
3093 callout_init(&asoc->dack_timer.timer, 0);
3094 callout_init(&asoc->asconf_timer.timer, 0);
3095 callout_init(&asoc->shut_guard_timer.timer, 0);
3096 callout_init(&asoc->autoclose_timer.timer, 0);
3097 callout_init(&asoc->delayed_event_timer.timer, 0);
3098 #else
3099 callout_init(&asoc->hb_timer.timer);
3100 callout_init(&asoc->dack_timer.timer);
3101 callout_init(&asoc->asconf_timer.timer);
3102 callout_init(&asoc->shut_guard_timer.timer);
3103 callout_init(&asoc->autoclose_timer.timer);
3104 callout_init(&asoc->delayed_event_timer.timer);
3105 #endif
3106 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3107 /* now file the port under the hash as well */
3108 if (inp->sctp_tcbhash != NULL) {
3109 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3110 inp->sctp_hashmark)];
3111 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3112 }
3113 SCTP_INP_WUNLOCK(inp);
3114 #ifdef SCTP_DEBUG
3115 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3116 kprintf("Association %p now allocated\n", stcb);
3117 }
3118 #endif
3119 return (stcb);
3120 }
3121
3122 void
3123 sctp_free_remote_addr(struct sctp_nets *net)
3124 {
3125 if (net == NULL)
3126 return;
3127 net->ref_count--;
3128 if (net->ref_count <= 0) {
3129 /* stop timer if running */
3130 callout_stop(&net->rxt_timer.timer);
3131 callout_stop(&net->pmtu_timer.timer);
3132 net->dest_state = SCTP_ADDR_NOT_REACHABLE;
3133 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3134 sctppcbinfo.ipi_count_raddr--;
3135 }
3136 }
3137
3138 /*
3139 * remove a remote endpoint address from an association, it
3140 * will fail if the address does not exist.
3141 */
3142 int
3143 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3144 {
3145 /*
3146 * Here we need to remove a remote address. This is quite simple, we
3147 * first find it in the list of address for the association
3148 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE on
3149 * that item.
3150 * Note we do not allow it to be removed if there are no other
3151 * addresses.
3152 */
3153 struct sctp_association *asoc;
3154 struct sctp_nets *net, *net_tmp;
3155 asoc = &stcb->asoc;
3156 if (asoc->numnets < 2) {
3157 /* Must have at LEAST two remote addresses */
3158 return (-1);
3159 }
3160 /* locate the address */
3161 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3162 net_tmp = TAILQ_NEXT(net, sctp_next);
3163 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3164 continue;
3165 }
3166 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3167 remaddr)) {
3168 /* we found the guy */
3169 asoc->numnets--;
3170 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3171 sctp_free_remote_addr(net);
3172 if (net == asoc->primary_destination) {
3173 /* Reset primary */
3174 struct sctp_nets *lnet;
3175 lnet = TAILQ_FIRST(&asoc->nets);
3176 /* Try to find a confirmed primary */
3177 asoc->primary_destination =
3178 sctp_find_alternate_net(stcb, lnet);
3179 }
3180 if (net == asoc->last_data_chunk_from) {
3181 /* Reset primary */
3182 asoc->last_data_chunk_from =
3183 TAILQ_FIRST(&asoc->nets);
3184 }
3185 if (net == asoc->last_control_chunk_from) {
3186 /* Reset primary */
3187 asoc->last_control_chunk_from =
3188 TAILQ_FIRST(&asoc->nets);
3189 }
3190 if (net == asoc->asconf_last_sent_to) {
3191 /* Reset primary */
3192 asoc->asconf_last_sent_to =
3193 TAILQ_FIRST(&asoc->nets);
3194 }
3195 return (0);
3196 }
3197 }
3198 /* not found. */
3199 return (-2);
3200 }
3201
3202
3203 static void
3204 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, u_int32_t tag)
3205 {
3206 struct sctpvtaghead *chain;
3207 struct sctp_tagblock *twait_block;
3208 struct timeval now;
3209 int set, i;
3210 SCTP_GETTIME_TIMEVAL(&now);
3211 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3212 set = 0;
3213 if (!LIST_EMPTY(chain)) {
3214 /* Block(s) present, lets find space, and expire on the fly */
3215 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3216 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3217 if ((twait_block->vtag_block[i].v_tag == 0) &&
3218 !set) {
3219 twait_block->vtag_block[0].tv_sec_at_expire =
3220 now.tv_sec + SCTP_TIME_WAIT;
3221 twait_block->vtag_block[0].v_tag = tag;
3222 set = 1;
3223 } else if ((twait_block->vtag_block[i].v_tag) &&
3224 ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3225 now.tv_sec)) {
3226 /* Audit expires this guy */
3227 twait_block->vtag_block[i].tv_sec_at_expire = 0;
3228 twait_block->vtag_block[i].v_tag = 0;
3229 if (set == 0) {
3230 /* Reuse it for my new tag */
3231 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3232 twait_block->vtag_block[0].v_tag = tag;
3233 set = 1;
3234 }
3235 }
3236 }
3237 if (set) {
3238 /*
3239 * We only do up to the block where we can
3240 * place our tag for audits
3241 */
3242 break;
3243 }
3244 }
3245 }
3246 /* Need to add a new block to chain */
3247 if (!set) {
3248 MALLOC(twait_block, struct sctp_tagblock *,
3249 sizeof(struct sctp_tagblock), M_PCB, M_NOWAIT);
3250 if (twait_block == NULL) {
3251 return;
3252 }
3253 memset(twait_block, 0, sizeof(struct sctp_timewait));
3254 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3255 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3256 SCTP_TIME_WAIT;
3257 twait_block->vtag_block[0].v_tag = tag;
3258 }
3259 }
3260
3261
3262 static void
3263 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3264 {
3265 struct sctp_iterator *it;
3266
3267
3268
3269 /* Unlock the tcb lock we do this so
3270 * we avoid a dead lock scenario where
3271 * the iterator is waiting on the TCB lock
3272 * and the TCB lock is waiting on the iterator
3273 * lock.
3274 */
3275 SCTP_ITERATOR_LOCK();
3276 SCTP_INP_INFO_WLOCK();
3277 SCTP_INP_WLOCK(inp);
3278 SCTP_TCB_LOCK(stcb);
3279
3280 it = stcb->asoc.stcb_starting_point_for_iterator;
3281 if (it == NULL) {
3282 return;
3283 }
3284 if (it->inp != stcb->sctp_ep) {
3285 /* hm, focused on the wrong one? */
3286 return;
3287 }
3288 if (it->stcb != stcb) {
3289 return;
3290 }
3291 it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3292 if (it->stcb == NULL) {
3293 /* done with all asoc's in this assoc */
3294 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3295 it->inp = NULL;
3296 } else {
3297
3298 it->inp = LIST_NEXT(inp, sctp_list);
3299 }
3300 }
3301 }
3302
3303 /*
3304 * Free the association after un-hashing the remote port.
3305 */
3306 void
3307 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3308 {
3309 struct sctp_association *asoc;
3310 struct sctp_nets *net, *prev;
3311 struct sctp_laddr *laddr;
3312 struct sctp_tmit_chunk *chk;
3313 struct sctp_asconf_addr *aparam;
3314 struct sctp_socket_q_list *sq;
3315
3316 /* first, lets purge the entry from the hash table. */
3317 crit_enter();
3318 if (stcb->asoc.state == 0) {
3319 kprintf("Freeing already free association:%p - huh??\n",
3320 stcb);
3321 crit_exit();
3322 return;
3323 }
3324 asoc = &stcb->asoc;
3325 asoc->state = 0;
3326 /* now clean up any other timers */
3327 callout_stop(&asoc->hb_timer.timer);
3328 callout_stop(&asoc->dack_timer.timer);
3329 callout_stop(&asoc->asconf_timer.timer);
3330 callout_stop(&asoc->shut_guard_timer.timer);
3331 callout_stop(&asoc->autoclose_timer.timer);
3332 callout_stop(&asoc->delayed_event_timer.timer);
3333 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3334 callout_stop(&net->rxt_timer.timer);
3335 callout_stop(&net->pmtu_timer.timer);
3336 }
3337
3338 /* Iterator asoc being freed we send an
3339 * unlocked TCB. It returns with INP_INFO
3340 * and INP write locked and the TCB locked
3341 * too and of course the iterator lock
3342 * in place as well..
3343 */
3344 SCTP_TCB_UNLOCK(stcb);
3345 sctp_iterator_asoc_being_freed(inp, stcb);
3346
3347 /* Null all of my entry's on the socket q */
3348 TAILQ_FOREACH(sq, &inp->sctp_queue_list, next_sq) {
3349 if (sq->tcb == stcb) {
3350 sq->tcb = NULL;
3351 }
3352 }
3353
3354 if (inp->sctp_tcb_at_block == (void *)stcb) {
3355 inp->error_on_block = ECONNRESET;
3356 }
3357
3358 if (inp->sctp_tcbhash) {
3359 LIST_REMOVE(stcb, sctp_tcbhash);
3360 }
3361 /* Now lets remove it from the list of ALL associations in the EP */
3362 LIST_REMOVE(stcb, sctp_tcblist);
3363 SCTP_INP_WUNLOCK(inp);
3364 SCTP_ITERATOR_UNLOCK();
3365
3366
3367 /* pull from vtag hash */
3368 LIST_REMOVE(stcb, sctp_asocs);
3369
3370 /*
3371 * Now before we can free the assoc, we must remove all of the
3372 * networks and any other allocated space.. i.e. add removes here
3373 * before the SCTP_ZONE_FREE() of the tasoc entry.
3374 */
3375
3376 sctp_add_vtag_to_timewait(inp, asoc->my_vtag);
3377 SCTP_INP_INFO_WUNLOCK();
3378 prev = NULL;
3379 while (!TAILQ_EMPTY(&asoc->nets)) {
3380 net = TAILQ_FIRST(&asoc->nets);
3381 /* pull from list */
3382 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3383 break;
3384 }
3385 prev = net;
3386 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3387 /* free it */
3388 net->ref_count = 0;
3389 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, net);
3390 sctppcbinfo.ipi_count_raddr--;
3391 }
3392 /*
3393 * The chunk lists and such SHOULD be empty but we check them
3394 * just in case.
3395 */
3396 /* anything on the wheel needs to be removed */
3397 while (!TAILQ_EMPTY(&asoc->out_wheel)) {
3398 struct sctp_stream_out *outs;
3399 outs = TAILQ_FIRST(&asoc->out_wheel);
3400 TAILQ_REMOVE(&asoc->out_wheel, outs, next_spoke);
3401 /* now clean up any chunks here */
3402 chk = TAILQ_FIRST(&outs->outqueue);
3403 while (chk) {
3404 TAILQ_REMOVE(&outs->outqueue, chk, sctp_next);
3405 if (chk->data) {
3406 sctp_m_freem(chk->data);
3407 chk->data = NULL;
3408 }
3409 chk->whoTo = NULL;
3410 chk->asoc = NULL;
3411 /* Free the chunk */
3412 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3413 sctppcbinfo.ipi_count_chunk--;
3414 sctppcbinfo.ipi_gencnt_chunk++;
3415 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3416 panic("Chunk count is negative");
3417 }
3418 chk = TAILQ_FIRST(&outs->outqueue);
3419 }
3420 outs = TAILQ_FIRST(&asoc->out_wheel);
3421 }
3422
3423 if (asoc->pending_reply) {
3424 FREE(asoc->pending_reply, M_PCB);
3425 asoc->pending_reply = NULL;
3426 }
3427 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3428 while (chk) {
3429 TAILQ_REMOVE(&asoc->pending_reply_queue, chk, sctp_next);
3430 if (chk->data) {
3431 sctp_m_freem(chk->data);
3432 chk->data = NULL;
3433 }
3434 chk->whoTo = NULL;
3435 chk->asoc = NULL;
3436 /* Free the chunk */
3437 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3438 sctppcbinfo.ipi_count_chunk--;
3439 sctppcbinfo.ipi_gencnt_chunk++;
3440 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3441 panic("Chunk count is negative");
3442 }
3443 chk = TAILQ_FIRST(&asoc->pending_reply_queue);
3444 }
3445 /* pending send queue SHOULD be empty */
3446 if (!TAILQ_EMPTY(&asoc->send_queue)) {
3447 chk = TAILQ_FIRST(&asoc->send_queue);
3448 while (chk) {
3449 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3450 if (chk->data) {
3451 sctp_m_freem(chk->data);
3452 chk->data = NULL;
3453 }
3454 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3455 sctppcbinfo.ipi_count_chunk--;
3456 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3457 panic("Chunk count is negative");
3458 }
3459 sctppcbinfo.ipi_gencnt_chunk++;
3460 chk = TAILQ_FIRST(&asoc->send_queue);
3461 }
3462 }
3463 /* sent queue SHOULD be empty */
3464 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3465 chk = TAILQ_FIRST(&asoc->sent_queue);
3466 while (chk) {
3467 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3468 if (chk->data) {
3469 sctp_m_freem(chk->data);
3470 chk->data = NULL;
3471 }
3472 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3473 sctppcbinfo.ipi_count_chunk--;
3474 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3475 panic("Chunk count is negative");
3476 }
3477 sctppcbinfo.ipi_gencnt_chunk++;
3478 chk = TAILQ_FIRST(&asoc->sent_queue);
3479 }
3480 }
3481 /* control queue MAY not be empty */
3482 if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3483 chk = TAILQ_FIRST(&asoc->control_send_queue);
3484 while (chk) {
3485 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3486 if (chk->data) {
3487 sctp_m_freem(chk->data);
3488 chk->data = NULL;
3489 }
3490 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3491 sctppcbinfo.ipi_count_chunk--;
3492 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3493 panic("Chunk count is negative");
3494 }
3495 sctppcbinfo.ipi_gencnt_chunk++;
3496 chk = TAILQ_FIRST(&asoc->control_send_queue);
3497 }
3498 }
3499 if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3500 chk = TAILQ_FIRST(&asoc->reasmqueue);
3501 while (chk) {
3502 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3503 if (chk->data) {
3504 sctp_m_freem(chk->data);
3505 chk->data = NULL;
3506 }
3507 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3508 sctppcbinfo.ipi_count_chunk--;
3509 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3510 panic("Chunk count is negative");
3511 }
3512 sctppcbinfo.ipi_gencnt_chunk++;
3513 chk = TAILQ_FIRST(&asoc->reasmqueue);
3514 }
3515 }
3516 if (!TAILQ_EMPTY(&asoc->delivery_queue)) {
3517 chk = TAILQ_FIRST(&asoc->delivery_queue);
3518 while (chk) {
3519 TAILQ_REMOVE(&asoc->delivery_queue, chk, sctp_next);
3520 if (chk->data) {
3521 sctp_m_freem(chk->data);
3522 chk->data = NULL;
3523 }
3524 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3525 sctppcbinfo.ipi_count_chunk--;
3526 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3527 panic("Chunk count is negative");
3528 }
3529 sctppcbinfo.ipi_gencnt_chunk++;
3530 chk = TAILQ_FIRST(&asoc->delivery_queue);
3531 }
3532 }
3533 if (asoc->mapping_array) {
3534 FREE(asoc->mapping_array, M_PCB);
3535 asoc->mapping_array = NULL;
3536 }
3537
3538 /* the stream outs */
3539 if (asoc->strmout) {
3540 FREE(asoc->strmout, M_PCB);
3541 asoc->strmout = NULL;
3542 }
3543 asoc->streamoutcnt = 0;
3544 if (asoc->strmin) {
3545 int i;
3546 for (i = 0; i < asoc->streamincnt; i++) {
3547 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3548 /* We have somethings on the streamin queue */
3549 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3550 while (chk) {
3551 TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3552 chk, sctp_next);
3553 if (chk->data) {
3554 sctp_m_freem(chk->data);
3555 chk->data = NULL;
3556 }
3557 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk,
3558 chk);
3559 sctppcbinfo.ipi_count_chunk--;
3560 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
3561 panic("Chunk count is negative");
3562 }
3563 sctppcbinfo.ipi_gencnt_chunk++;
3564 chk = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3565 }
3566 }
3567 }
3568 FREE(asoc->strmin, M_PCB);
3569 asoc->strmin = NULL;
3570 }
3571 asoc->streamincnt = 0;
3572 /* local addresses, if any */
3573 while (!LIST_EMPTY(&asoc->sctp_local_addr_list)) {
3574 laddr = LIST_FIRST(&asoc->sctp_local_addr_list);
3575 LIST_REMOVE(laddr, sctp_nxt_addr);
3576 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3577 sctppcbinfo.ipi_count_laddr--;
3578 }
3579 /* pending asconf (address) parameters */
3580 while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3581 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3582 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3583 FREE(aparam, M_PCB);
3584 }
3585 if (asoc->last_asconf_ack_sent != NULL) {
3586 sctp_m_freem(asoc->last_asconf_ack_sent);
3587 asoc->last_asconf_ack_sent = NULL;
3588 }
3589 /* Insert new items here :> */
3590
3591 /* Get rid of LOCK */
3592 SCTP_TCB_LOCK_DESTROY(stcb);
3593
3594 /* now clean up the tasoc itself */
3595 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3596 sctppcbinfo.ipi_count_asoc--;
3597 if ((inp->sctp_socket->so_snd.ssb_cc) ||
3598 (inp->sctp_socket->so_snd.ssb_mbcnt)) {
3599 /* This will happen when a abort is done */
3600 inp->sctp_socket->so_snd.ssb_cc = 0;
3601 inp->sctp_socket->so_snd.ssb_mbcnt = 0;
3602 }
3603 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
3604 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
3605 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3606 /*
3607 * For the base fd, that is NOT in TCP pool we
3608 * turn off the connected flag. This allows
3609 * non-listening endpoints to connect/shutdown/
3610 * connect.
3611 */
3612 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3613 soisdisconnected(inp->sctp_socket);
3614 }
3615 /*
3616 * For those that are in the TCP pool we just leave
3617 * so it cannot be used. When they close the fd we
3618 * will free it all.
3619 */
3620 }
3621 }
3622 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3623 sctp_inpcb_free(inp, 0);
3624 }
3625 crit_exit();
3626 }
3627
3628
3629 /*
3630 * determine if a destination is "reachable" based upon the addresses
3631 * bound to the current endpoint (e.g. only v4 or v6 currently bound)
3632 */
3633 /*
3634 * FIX: if we allow assoc-level bindx(), then this needs to be fixed
3635 * to use assoc level v4/v6 flags, as the assoc *may* not have the
3636 * same address types bound as its endpoint
3637 */
3638 int
3639 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
3640 {
3641 struct sctp_inpcb *inp;
3642 int answer;
3643
3644 /* No locks here, the TCB, in all cases is already
3645 * locked and an assoc is up. There is either a
3646 * INP lock by the caller applied (in asconf case when
3647 * deleting an address) or NOT in the HB case, however
3648 * if HB then the INP increment is up and the INP
3649 * will not be removed (on top of the fact that
3650 * we have a TCB lock). So we only want to
3651 * read the sctp_flags, which is either bound-all
3652 * or not.. no protection needed since once an
3653 * assoc is up you can't be changing your binding.
3654 */
3655 inp = stcb->sctp_ep;
3656 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3657 /* if bound all, destination is not restricted */
3658 /* RRS: Question during lock work: Is this
3659 * correct? If you are bound-all you still
3660 * might need to obey the V4--V6 flags???
3661 * IMO this bound-all stuff needs to be removed!
3662 */
3663 return (1);
3664 }
3665 /* NOTE: all "scope" checks are done when local addresses are added */
3666 if (destaddr->sa_family == AF_INET6) {
3667 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3668 answer = inp->inp_vflag & INP_IPV6;
3669 #else
3670 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
3671 #endif
3672 } else if (destaddr->sa_family == AF_INET) {
3673 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3674 answer = inp->inp_vflag & INP_IPV4;
3675 #else
3676 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
3677 #endif
3678 } else {
3679 /* invalid family, so it's unreachable */
3680 answer = 0;
3681 }
3682 return (answer);
3683 }
3684
3685 /*
3686 * update the inp_vflags on an endpoint
3687 */
3688 static void
3689 sctp_update_ep_vflag(struct sctp_inpcb *inp) {
3690 struct sctp_laddr *laddr;
3691
3692 /* first clear the flag */
3693 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3694 inp->inp_vflag = 0;
3695 #else
3696 inp->ip_inp.inp.inp_vflag = 0;
3697 #endif
3698 /* set the flag based on addresses on the ep list */
3699 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3700 if (laddr->ifa == NULL) {
3701 #ifdef SCTP_DEBUG
3702 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3703 kprintf("An ounce of prevention is worth a pound of cure\n");
3704 }
3705 #endif /* SCTP_DEBUG */
3706 continue;
3707 }
3708 if (laddr->ifa->ifa_addr) {
3709 continue;
3710 }
3711 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
3712 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3713 inp->inp_vflag |= INP_IPV6;
3714 #else
3715 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3716 #endif
3717 } else if (laddr->ifa->ifa_addr->sa_family == AF_INET) {
3718 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3719 inp->inp_vflag |= INP_IPV4;
3720 #else
3721 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3722 #endif
3723 }
3724 }
3725 }
3726
3727 /*
3728 * Add the address to the endpoint local address list
3729 * There is nothing to be done if we are bound to all addresses
3730 */
3731 int
3732 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3733 {
3734 struct sctp_laddr *laddr;
3735 int fnd, error;
3736 fnd = 0;
3737
3738 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3739 /* You are already bound to all. You have it already */
3740 return (0);
3741 }
3742 if (ifa->ifa_addr->sa_family == AF_INET6) {
3743 struct in6_ifaddr *ifa6;
3744 ifa6 = (struct in6_ifaddr *)ifa;
3745 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3746 IN6_IFF_DEPRECATED | IN6_IFF_ANYCAST | IN6_IFF_NOTREADY))
3747 /* Can't bind a non-existent addr. */
3748 return (-1);
3749 }
3750 /* first, is it already present? */
3751 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3752 if (laddr->ifa == ifa) {
3753 fnd = 1;
3754 break;
3755 }
3756 }
3757
3758 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd == 0)) {
3759 /* Not bound to all */
3760 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa);
3761 if (error != 0)
3762 return (error);
3763 inp->laddr_count++;
3764 /* update inp_vflag flags */
3765 if (ifa->ifa_addr->sa_family == AF_INET6) {
3766 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3767 inp->inp_vflag |= INP_IPV6;
3768 #else
3769 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
3770 #endif
3771 } else if (ifa->ifa_addr->sa_family == AF_INET) {
3772 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__))
3773 inp->inp_vflag |= INP_IPV4;
3774 #else
3775 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
3776 #endif
3777 }
3778 }
3779 return (0);
3780 }
3781
3782
3783 /*
3784 * select a new (hopefully reachable) destination net
3785 * (should only be used when we deleted an ep addr that is the
3786 * only usable source address to reach the destination net)
3787 */
3788 static void
3789 sctp_select_primary_destination(struct sctp_tcb *stcb)
3790 {
3791 struct sctp_nets *net;
3792
3793 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3794 /* for now, we'll just pick the first reachable one we find */
3795 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
3796 continue;
3797 if (sctp_destination_is_reachable(stcb,
3798 (struct sockaddr *)&net->ro._l_addr)) {
3799 /* found a reachable destination */
3800 stcb->asoc.primary_destination = net;
3801 }
3802 }
3803 /* I can't there from here! ...we're gonna die shortly... */
3804 }
3805
3806
3807 /*
3808 * Delete the address from the endpoint local address list
3809 * There is nothing to be done if we are bound to all addresses
3810 */
3811 int
3812 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct ifaddr *ifa)
3813 {
3814 struct sctp_laddr *laddr;
3815 int fnd;
3816 fnd = 0;
3817 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3818 /* You are already bound to all. You have it already */
3819 return (EINVAL);
3820 }
3821
3822 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
3823 if (laddr->ifa == ifa) {
3824 fnd = 1;
3825 break;
3826 }
3827 }
3828 if (fnd && (inp->laddr_count < 2)) {
3829 /* can't delete unless there are at LEAST 2 addresses */
3830 return (-1);
3831 }
3832 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (fnd)) {
3833 /*
3834 * clean up any use of this address
3835 * go through our associations and clear any
3836 * last_used_address that match this one
3837 * for each assoc, see if a new primary_destination is needed
3838 */
3839 struct sctp_tcb *stcb;
3840
3841 /* clean up "next_addr_touse" */
3842 if (inp->next_addr_touse == laddr)
3843 /* delete this address */
3844 inp->next_addr_touse = NULL;
3845
3846 /* clean up "last_used_address" */
3847 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3848 if (stcb->asoc.last_used_address == laddr)
3849 /* delete this address */
3850 stcb->asoc.last_used_address = NULL;
3851 } /* for each tcb */
3852
3853 /* remove it from the ep list */
3854 sctp_remove_laddr(laddr);
3855 inp->laddr_count--;
3856 /* update inp_vflag flags */
3857 sctp_update_ep_vflag(inp);
3858 /* select a new primary destination if needed */
3859 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
3860 /* presume caller (sctp_asconf.c) already owns INP lock */
3861 SCTP_TCB_LOCK(stcb);
3862 if (sctp_destination_is_reachable(stcb,
3863 (struct sockaddr *)&stcb->asoc.primary_destination->ro._l_addr) == 0) {
3864 sctp_select_primary_destination(stcb);
3865 }
3866 SCTP_TCB_UNLOCK(stcb);
3867 } /* for each tcb */
3868 }
3869 return (0);
3870 }
3871
3872 /*
3873 * Add the addr to the TCB local address list
3874 * For the BOUNDALL or dynamic case, this is a "pending" address list
3875 * (eg. addresses waiting for an ASCONF-ACK response)
3876 * For the subset binding, static case, this is a "valid" address list
3877 */
3878 int
3879 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3880 {
3881 struct sctp_inpcb *inp;
3882 struct sctp_laddr *laddr;
3883 int error;
3884
3885 /* Assumes TCP is locked.. and possiblye
3886 * the INP. May need to confirm/fix that if
3887 * we need it and is not the case.
3888 */
3889 inp = stcb->sctp_ep;
3890 if (ifa->ifa_addr->sa_family == AF_INET6) {
3891 struct in6_ifaddr *ifa6;
3892 ifa6 = (struct in6_ifaddr *)ifa;
3893 if (ifa6->ia6_flags & (IN6_IFF_DETACHED |
3894 /* IN6_IFF_DEPRECATED | */
3895 IN6_IFF_ANYCAST |
3896 IN6_IFF_NOTREADY))
3897 /* Can't bind a non-existent addr. */
3898 return (-1);
3899 }
3900 /* does the address already exist? */
3901 LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3902 if (laddr->ifa == ifa) {
3903 return (-1);
3904 }
3905 }
3906
3907 /* add to the list */
3908 error = sctp_insert_laddr(&stcb->asoc.sctp_local_addr_list, ifa);
3909 if (error != 0)
3910 return (error);
3911 return (0);
3912 }
3913
3914 /*
3915 * insert an laddr entry with the given ifa for the desired list
3916 */
3917 int
3918 sctp_insert_laddr(struct sctpladdr *list, struct ifaddr *ifa) {
3919 struct sctp_laddr *laddr;
3920
3921 crit_enter();
3922 laddr = (struct sctp_laddr *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr);
3923 if (laddr == NULL) {
3924 /* out of memory? */
3925 crit_exit();
3926 return (EINVAL);
3927 }
3928 sctppcbinfo.ipi_count_laddr++;
3929 sctppcbinfo.ipi_gencnt_laddr++;
3930 bzero(laddr, sizeof(*laddr));
3931 laddr->ifa = ifa;
3932 /* insert it */
3933 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
3934
3935 crit_exit();
3936 return (0);
3937 }
3938
3939 /*
3940 * Remove an laddr entry from the local address list (on an assoc)
3941 */
3942 void
3943 sctp_remove_laddr(struct sctp_laddr *laddr)
3944 {
3945 crit_enter();
3946 /* remove from the list */
3947 LIST_REMOVE(laddr, sctp_nxt_addr);
3948 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
3949 sctppcbinfo.ipi_count_laddr--;
3950 sctppcbinfo.ipi_gencnt_laddr++;
3951 crit_exit();
3952 }
3953
3954 /*
3955 * Remove an address from the TCB local address list
3956 */
3957 int
3958 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct ifaddr *ifa)
3959 {
3960 struct sctp_inpcb *inp;
3961 struct sctp_laddr *laddr;
3962
3963 /* This is called by asconf work. It is assumed that
3964 * a) The TCB is locked
3965 * and
3966 * b) The INP is locked.
3967 * This is true in as much as I can trace through
3968 * the entry asconf code where I did these locks.
3969 * Again, the ASCONF code is a bit different in
3970 * that it does lock the INP during its work often
3971 * times. This must be since we don't want other
3972 * proc's looking up things while what they are
3973 * looking up is changing :-D
3974 */
3975
3976 inp = stcb->sctp_ep;
3977 /* if subset bound and don't allow ASCONF's, can't delete last */
3978 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
3979 ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
3980 if (stcb->asoc.numnets < 2) {
3981 /* can't delete last address */
3982 return (-1);
3983 }
3984 }
3985
3986 LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
3987 /* remove the address if it exists */
3988 if (laddr->ifa == NULL)
3989 continue;
3990 if (laddr->ifa == ifa) {
3991 sctp_remove_laddr(laddr);
3992 return (0);
3993 }
3994 }
3995
3996 /* address not found! */
3997 return (-1);
3998 }
3999
4000 /*
4001 * Remove an address from the TCB local address list
4002 * lookup using a sockaddr addr
4003 */
4004 int
4005 sctp_del_local_addr_assoc_sa(struct sctp_tcb *stcb, struct sockaddr *sa)
4006 {
4007 struct sctp_inpcb *inp;
4008 struct sctp_laddr *laddr;
4009 struct sockaddr *l_sa;
4010
4011 /*
4012 * This function I find does not seem to have a caller.
4013 * As such we NEED TO DELETE this code. If we do
4014 * find a caller, the caller MUST have locked the TCB
4015 * at the least and probably the INP as well.
4016 */
4017 inp = stcb->sctp_ep;
4018 /* if subset bound and don't allow ASCONF's, can't delete last */
4019 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4020 ((inp->sctp_flags & SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4021 if (stcb->asoc.numnets < 2) {
4022 /* can't delete last address */
4023 return (-1);
4024 }
4025 }
4026
4027 LIST_FOREACH(laddr, &stcb->asoc.sctp_local_addr_list, sctp_nxt_addr) {
4028 /* make sure the address exists */
4029 if (laddr->ifa == NULL)
4030 continue;
4031 if (laddr->ifa->ifa_addr == NULL)
4032 continue;
4033
4034 l_sa = laddr->ifa->ifa_addr;
4035 if (l_sa->sa_family == AF_INET6) {
4036 /* IPv6 address */
4037 struct sockaddr_in6 *sin1, *sin2;
4038 sin1 = (struct sockaddr_in6 *)l_sa;
4039 sin2 = (struct sockaddr_in6 *)sa;
4040 if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4041 sizeof(struct in6_addr)) == 0) {
4042 /* matched */
4043 sctp_remove_laddr(laddr);
4044 return (0);
4045 }
4046 } else if (l_sa->sa_family == AF_INET) {
4047 /* IPv4 address */
4048 struct sockaddr_in *sin1, *sin2;
4049 sin1 = (struct sockaddr_in *)l_sa;
4050 sin2 = (struct sockaddr_in *)sa;
4051 if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4052 /* matched */
4053 sctp_remove_laddr(laddr);
4054 return (0);
4055 }
4056 } else {
4057 /* invalid family */
4058 return (-1);
4059 }
4060 } /* end foreach */
4061 /* address not found! */
4062 return (-1);
4063 }
4064
4065 static char sctp_pcb_initialized = 0;
4066
4067 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4068 /* sysctl */
4069 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4070 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4071
4072 #endif /* FreeBSD || APPLE || DragonFly */
4073
4074 #ifndef SCTP_TCBHASHSIZE
4075 #define SCTP_TCBHASHSIZE 1024
4076 #endif
4077
4078 #ifndef SCTP_CHUNKQUEUE_SCALE
4079 #define SCTP_CHUNKQUEUE_SCALE 10
4080 #endif
4081
4082 void
4083 sctp_pcb_init(void)
4084 {
4085 /*
4086 * SCTP initialization for the PCB structures
4087 * should be called by the sctp_init() funciton.
4088 */
4089 int i;
4090 int hashtblsize = SCTP_TCBHASHSIZE;
4091
4092 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
4093 int sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
4094 #endif
4095
4096 if (sctp_pcb_initialized != 0) {
4097 /* error I was called twice */
4098 return;
4099 }
4100 sctp_pcb_initialized = 1;
4101
4102 /* Init all peg counts */
4103 for (i = 0; i < SCTP_NUMBER_OF_PEGS; i++) {
4104 sctp_pegs[i] = 0;
4105 }
4106
4107 /* init the empty list of (All) Endpoints */
4108 LIST_INIT(&sctppcbinfo.listhead);
4109
4110 /* init the iterator head */
4111 LIST_INIT(&sctppcbinfo.iteratorhead);
4112
4113 /* init the hash table of endpoints */
4114 #if defined(__FreeBSD__)
4115 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
4116 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &hashtblsize);
4117 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4118 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4119 #else
4120 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
4121 hashtblsize);
4122 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
4123 sctp_pcbtblsize);
4124 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
4125 sctp_chunkscale);
4126 #endif
4127 #endif
4128
4129 sctppcbinfo.sctp_asochash = hashinit((hashtblsize * 31),
4130 #ifdef __NetBSD__
4131 HASH_LIST,
4132 #endif
4133 M_PCB,
4134 #if defined(__NetBSD__) || defined(__OpenBSD__)
4135 M_WAITOK,
4136 #endif
4137 &sctppcbinfo.hashasocmark);
4138
4139 sctppcbinfo.sctp_ephash = hashinit(hashtblsize,
4140 #ifdef __NetBSD__
4141 HASH_LIST,
4142 #endif
4143 M_PCB,
4144 #if defined(__NetBSD__) || defined(__OpenBSD__)
4145 M_WAITOK,
4146 #endif
4147 &sctppcbinfo.hashmark);
4148
4149 sctppcbinfo.sctp_tcpephash = hashinit(hashtblsize,
4150 #ifdef __NetBSD__
4151 HASH_LIST,
4152 #endif
4153 M_PCB,
4154 #if defined(__NetBSD__) || defined(__OpenBSD__)
4155 M_WAITOK,
4156 #endif
4157 &sctppcbinfo.hashtcpmark);
4158
4159 sctppcbinfo.hashtblsize = hashtblsize;
4160
4161 /* init the zones */
4162 /*
4163 * FIX ME: Should check for NULL returns, but if it does fail we
4164 * are doomed to panic anyways... add later maybe.
4165 */
4166 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4167 sizeof(struct sctp_inpcb), maxsockets);
4168
4169 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4170 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4171
4172 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4173 sizeof(struct sctp_laddr),
4174 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4175
4176 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4177 sizeof(struct sctp_nets),
4178 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4179
4180 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4181 sizeof(struct sctp_tmit_chunk),
4182 (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4183 sctp_chunkscale));
4184
4185 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_sockq, "sctp_sockq",
4186 sizeof(struct sctp_socket_q_list),
4187 (sctp_max_number_of_assoc * sctp_scale_up_for_address *
4188 sctp_chunkscale));
4189
4190 /* Master Lock INIT for info structure */
4191 SCTP_INP_INFO_LOCK_INIT();
4192 SCTP_ITERATOR_LOCK_INIT();
4193 /* not sure if we need all the counts */
4194 sctppcbinfo.ipi_count_ep = 0;
4195 sctppcbinfo.ipi_gencnt_ep = 0;
4196 /* assoc/tcb zone info */
4197 sctppcbinfo.ipi_count_asoc = 0;
4198 sctppcbinfo.ipi_gencnt_asoc = 0;
4199 /* local addrlist zone info */
4200 sctppcbinfo.ipi_count_laddr = 0;
4201 sctppcbinfo.ipi_gencnt_laddr = 0;
4202 /* remote addrlist zone info */
4203 sctppcbinfo.ipi_count_raddr = 0;
4204 sctppcbinfo.ipi_gencnt_raddr = 0;
4205 /* chunk info */
4206 sctppcbinfo.ipi_count_chunk = 0;
4207 sctppcbinfo.ipi_gencnt_chunk = 0;
4208
4209 /* socket queue zone info */
4210 sctppcbinfo.ipi_count_sockq = 0;
4211 sctppcbinfo.ipi_gencnt_sockq = 0;
4212
4213 /* mbuf tracker */
4214 sctppcbinfo.mbuf_track = 0;
4215 /* port stuff */
4216 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__APPLE__) \
4217 || defined(__DragonFly__)
4218 sctppcbinfo.lastlow = ipport_firstauto;
4219 #else
4220 sctppcbinfo.lastlow = anonportmin;
4221 #endif
4222 /* Init the TIMEWAIT list */
4223 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4224 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4225 }
4226
4227 #if defined(_SCTP_NEEDS_CALLOUT_) && !defined(__APPLE__)
4228 TAILQ_INIT(&sctppcbinfo.callqueue);
4229 #endif
4230
4231 }
4232
4233 int
4234 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4235 int iphlen, int offset, int limit, struct sctphdr *sh,
4236 struct sockaddr *altsa)
4237 {
4238 /*
4239 * grub through the INIT pulling addresses and
4240 * loading them to the nets structure in the asoc.
4241 * The from address in the mbuf should also be loaded
4242 * (if it is not already). This routine can be called
4243 * with either INIT or INIT-ACK's as long as the
4244 * m points to the IP packet and the offset points
4245 * to the beginning of the parameters.
4246 */
4247 struct sctp_inpcb *inp, *l_inp;
4248 struct sctp_nets *net, *net_tmp;
4249 struct ip *iph;
4250 struct sctp_paramhdr *phdr, parm_buf;
4251 struct sctp_tcb *stcb_tmp;
4252 u_int16_t ptype, plen;
4253 struct sockaddr *sa;
4254 struct sockaddr_storage dest_store;
4255 struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4256 struct sockaddr_in sin;
4257 struct sockaddr_in6 sin6;
4258
4259 /* First get the destination address setup too. */
4260 memset(&sin, 0, sizeof(sin));
4261 memset(&sin6, 0, sizeof(sin6));
4262
4263 sin.sin_family = AF_INET;
4264 sin.sin_len = sizeof(sin);
4265 sin.sin_port = stcb->rport;
4266
4267 sin6.sin6_family = AF_INET6;
4268 sin6.sin6_len = sizeof(struct sockaddr_in6);
4269 sin6.sin6_port = stcb->rport;
4270 if (altsa == NULL) {
4271 iph = mtod(m, struct ip *);
4272 if (iph->ip_v == IPVERSION) {
4273 /* its IPv4 */
4274 struct sockaddr_in *sin_2;
4275 sin_2 = (struct sockaddr_in *)(local_sa);
4276 memset(sin_2, 0, sizeof(sin));
4277 sin_2->sin_family = AF_INET;
4278 sin_2->sin_len = sizeof(sin);
4279 sin_2->sin_port = sh->dest_port;
4280 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr ;
4281 sin.sin_addr = iph->ip_src;
4282 sa = (struct sockaddr *)&sin;
4283 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4284 /* its IPv6 */
4285 struct ip6_hdr *ip6;
4286 struct sockaddr_in6 *sin6_2;
4287
4288 ip6 = mtod(m, struct ip6_hdr *);
4289 sin6_2 = (struct sockaddr_in6 *)(local_sa);
4290 memset(sin6_2, 0, sizeof(sin6));
4291 sin6_2->sin6_family = AF_INET6;
4292 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4293 sin6_2->sin6_port = sh->dest_port;
4294 sin6.sin6_addr = ip6->ip6_src;
4295 sa = (struct sockaddr *)&sin6;
4296 } else {
4297 sa = NULL;
4298 }
4299 } else {
4300 /*
4301 * For cookies we use the src address NOT from the packet
4302 * but from the original INIT
4303 */
4304 sa = altsa;
4305 }
4306 /* Turn off ECN until we get through all params */
4307 stcb->asoc.ecn_allowed = 0;
4308
4309 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4310 /* mark all addresses that we have currently on the list */
4311 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4312 }
4313 /* does the source address already exist? if so skip it */
4314 l_inp = inp = stcb->sctp_ep;
4315 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4316 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4317 /* we must add the source address */
4318 /* no scope set here since we have a tcb already. */
4319 if ((sa->sa_family == AF_INET) &&
4320 (stcb->asoc.ipv4_addr_legal)) {
4321 if (sctp_add_remote_addr(stcb, sa, 0, 2)) {
4322 return (-1);
4323 }
4324 } else if ((sa->sa_family == AF_INET6) &&
4325 (stcb->asoc.ipv6_addr_legal)) {
4326 if (sctp_add_remote_addr(stcb, sa, 0, 3)) {
4327 return (-1);
4328 }
4329 }
4330 } else {
4331 if (net_tmp != NULL && stcb_tmp == stcb) {
4332 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4333 } else if (stcb_tmp != stcb) {
4334 /* It belongs to another association? */
4335 return (-1);
4336 }
4337 }
4338 /* since a unlock occured we must check the
4339 * TCB's state and the pcb's gone flags.
4340 */
4341 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4342 /* the user freed the ep */
4343 return (-1);
4344 }
4345 if (stcb->asoc.state == 0) {
4346 /* the assoc was freed? */
4347 return (-1);
4348 }
4349
4350 /* now we must go through each of the params. */
4351 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4352 while (phdr) {
4353 ptype = ntohs(phdr->param_type);
4354 plen = ntohs(phdr->param_length);
4355 /*kprintf("ptype => %d, plen => %d\n", ptype, plen);*/
4356 if (offset + plen > limit) {
4357 break;
4358 }
4359 if (plen == 0) {
4360 break;
4361 }
4362 if ((ptype == SCTP_IPV4_ADDRESS) &&
4363 (stcb->asoc.ipv4_addr_legal)) {
4364 struct sctp_ipv4addr_param *p4, p4_buf;
4365 /* ok get the v4 address and check/add */
4366 phdr = sctp_get_next_param(m, offset,
4367 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4368 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4369 phdr == NULL) {
4370 return (-1);
4371 }
4372 p4 = (struct sctp_ipv4addr_param *)phdr;
4373 sin.sin_addr.s_addr = p4->addr;
4374 sa = (struct sockaddr *)&sin;
4375 inp = stcb->sctp_ep;
4376 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4377 local_sa, stcb);
4378
4379 if ((stcb_tmp== NULL && inp == stcb->sctp_ep) ||
4380 inp == NULL) {
4381 /* we must add the source address */
4382 /* no scope set since we have a tcb already */
4383
4384 /* we must validate the state again here */
4385 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4386 /* the user freed the ep */
4387 return (-1);
4388 }
4389 if (stcb->asoc.state == 0) {
4390 /* the assoc was freed? */
4391 return (-1);
4392 }
4393 if (sctp_add_remote_addr(stcb, sa, 0, 4)) {
4394 return (-1);
4395 }
4396 } else if (stcb_tmp == stcb) {
4397 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4398 /* the user freed the ep */
4399 return (-1);
4400 }
4401 if (stcb->asoc.state == 0) {
4402 /* the assoc was freed? */
4403 return (-1);
4404 }
4405 if (net != NULL) {
4406 /* clear flag */
4407 net->dest_state &=
4408 ~SCTP_ADDR_NOT_IN_ASSOC;
4409 }
4410 } else {
4411 /* strange, address is in another assoc?
4412 * straighten out locks.
4413 */
4414 SCTP_TCB_UNLOCK(stcb_tmp);
4415 SCTP_INP_RLOCK(inp);
4416 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4417 /* the user freed the ep */
4418 SCTP_INP_RUNLOCK(l_inp);
4419 return (-1);
4420 }
4421 if (stcb->asoc.state == 0) {
4422 /* the assoc was freed? */
4423 SCTP_INP_RUNLOCK(l_inp);
4424 return (-1);
4425 }
4426 SCTP_TCB_LOCK(stcb);
4427 SCTP_INP_RUNLOCK(stcb->sctp_ep);
4428 return (-1);
4429 }
4430 } else if ((ptype == SCTP_IPV6_ADDRESS) &&
4431 (stcb->asoc.ipv6_addr_legal)) {
4432 /* ok get the v6 address and check/add */
4433 struct sctp_ipv6addr_param *p6, p6_buf;
4434 phdr = sctp_get_next_param(m, offset,
4435 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4436 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4437 phdr == NULL) {
4438 return (-1);
4439 }
4440 p6 = (struct sctp_ipv6addr_param *)phdr;
4441 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4442 sizeof(p6->addr));
4443 sa = (struct sockaddr *)&sin6;
4444 inp = stcb->sctp_ep;
4445 stcb_tmp= sctp_findassociation_ep_addr(&inp, sa, &net,
4446 local_sa, stcb);
4447 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4448 inp == NULL)) {
4449 /* we must validate the state again here */
4450 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4451 /* the user freed the ep */
4452 return (-1);
4453 }
4454 if (stcb->asoc.state == 0) {
4455 /* the assoc was freed? */
4456 return (-1);
4457 }
4458 /* we must add the address, no scope set */
4459 if (sctp_add_remote_addr(stcb, sa, 0, 5)) {
4460 return (-1);
4461 }
4462 } else if (stcb_tmp == stcb) {
4463 /* we must validate the state again here */
4464 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4465 /* the user freed the ep */
4466 return (-1);
4467 }
4468 if (stcb->asoc.state == 0) {
4469 /* the assoc was freed? */
4470 return (-1);
4471 }
4472 if (net != NULL) {
4473 /* clear flag */
4474 net->dest_state &=
4475 ~SCTP_ADDR_NOT_IN_ASSOC;
4476 }
4477 } else {
4478 /* strange, address is in another assoc?
4479 * straighten out locks.
4480 */
4481 SCTP_TCB_UNLOCK(stcb_tmp);
4482 SCTP_INP_RLOCK(l_inp);
4483 /* we must validate the state again here */
4484 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE|SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4485 /* the user freed the ep */
4486 SCTP_INP_RUNLOCK(l_inp);
4487 return (-1);
4488 }
4489 if (stcb->asoc.state == 0) {
4490 /* the assoc was freed? */
4491 SCTP_INP_RUNLOCK(l_inp);
4492 return (-1);
4493 }
4494 SCTP_TCB_LOCK(stcb);
4495 SCTP_INP_RUNLOCK(l_inp);
4496 return (-1);
4497 }
4498 } else if (ptype == SCTP_ECN_CAPABLE) {
4499 stcb->asoc.ecn_allowed = 1;
4500 } else if (ptype == SCTP_ULP_ADAPTION) {
4501 if (stcb->asoc.state != SCTP_STATE_OPEN) {
4502 struct sctp_adaption_layer_indication ai, *aip;
4503
4504 phdr = sctp_get_next_param(m, offset,
4505 (struct sctp_paramhdr *)&ai, sizeof(ai));
4506 aip = (struct sctp_adaption_layer_indication *)phdr;
4507 sctp_ulp_notify(SCTP_NOTIFY_ADAPTION_INDICATION,
4508 stcb, ntohl(aip->indication), NULL);
4509 }
4510 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4511 struct sctp_asconf_addr_param lstore, *fee;
4512 struct sctp_asconf_addrv4_param *fii;
4513 int lptype;
4514 struct sockaddr *lsa = NULL;
4515
4516 stcb->asoc.peer_supports_asconf = 1;
4517 stcb->asoc.peer_supports_asconf_setprim = 1;
4518 if (plen > sizeof(lstore)) {
4519 return (-1);
4520 }
4521 phdr = sctp_get_next_param(m, offset,
4522 (struct sctp_paramhdr *)&lstore, plen);
4523 if (phdr == NULL) {
4524 return (-1);
4525 }
4526
4527 fee = (struct sctp_asconf_addr_param *)phdr;
4528 lptype = ntohs(fee->addrp.ph.param_type);
4529 if (lptype == SCTP_IPV4_ADDRESS) {
4530 if (plen !=
4531 sizeof(struct sctp_asconf_addrv4_param)) {
4532 kprintf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4533 (int)sizeof(struct sctp_asconf_addrv4_param),
4534 plen);
4535 } else {
4536 fii = (struct sctp_asconf_addrv4_param *)fee;
4537 sin.sin_addr.s_addr = fii->addrp.addr;
4538 lsa = (struct sockaddr *)&sin;
4539 }
4540 } else if (lptype == SCTP_IPV6_ADDRESS) {
4541 if (plen !=
4542 sizeof(struct sctp_asconf_addr_param)) {
4543 kprintf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4544 (int)sizeof(struct sctp_asconf_addr_param),
4545 plen);
4546 } else {
4547 memcpy(sin6.sin6_addr.s6_addr,
4548 fee->addrp.addr,
4549 sizeof(fee->addrp.addr));
4550 lsa = (struct sockaddr *)&sin6;
4551 }
4552 }
4553 if (lsa) {
4554 sctp_set_primary_addr(stcb, sa, NULL);
4555 }
4556
4557 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4558 /* Peer supports pr-sctp */
4559 stcb->asoc.peer_supports_prsctp = 1;
4560 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4561 /* A supported extension chunk */
4562 struct sctp_supported_chunk_types_param *pr_supported;
4563 uint8_t local_store[128];
4564 int num_ent, i;
4565
4566 phdr = sctp_get_next_param(m, offset,
4567 (struct sctp_paramhdr *)&local_store, plen);
4568 if (phdr == NULL) {
4569 return (-1);
4570 }
4571 stcb->asoc.peer_supports_asconf = 0;
4572 stcb->asoc.peer_supports_asconf_setprim = 0;
4573 stcb->asoc.peer_supports_prsctp = 0;
4574 stcb->asoc.peer_supports_pktdrop = 0;
4575 stcb->asoc.peer_supports_strreset = 0;
4576 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4577 num_ent = plen - sizeof(struct sctp_paramhdr);
4578 for (i=0; i<num_ent; i++) {
4579 switch (pr_supported->chunk_types[i]) {
4580 case SCTP_ASCONF:
4581 stcb->asoc.peer_supports_asconf = 1;
4582 stcb->asoc.peer_supports_asconf_setprim = 1;
4583 break;
4584 case SCTP_ASCONF_ACK:
4585 stcb->asoc.peer_supports_asconf = 1;
4586 stcb->asoc.peer_supports_asconf_setprim = 1;
4587 break;
4588 case SCTP_FORWARD_CUM_TSN:
4589 stcb->asoc.peer_supports_prsctp = 1;
4590 break;
4591 case SCTP_PACKET_DROPPED:
4592 stcb->asoc.peer_supports_pktdrop = 1;
4593 break;
4594 case SCTP_STREAM_RESET:
4595 stcb->asoc.peer_supports_strreset = 1;
4596 break;
4597 default:
4598 /* one I have not learned yet */
4599 break;
4600
4601 }
4602 }
4603 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4604 /* Peer supports ECN-nonce */
4605 stcb->asoc.peer_supports_ecn_nonce = 1;
4606 stcb->asoc.ecn_nonce_allowed = 1;
4607 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4608 (ptype == SCTP_STATE_COOKIE) ||
4609 (ptype == SCTP_UNRECOG_PARAM) ||
4610 (ptype == SCTP_COOKIE_PRESERVE) ||
4611 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4612 (ptype == SCTP_ADD_IP_ADDRESS) ||
4613 (ptype == SCTP_DEL_IP_ADDRESS) ||
4614 (ptype == SCTP_ERROR_CAUSE_IND) ||
4615 (ptype == SCTP_SUCCESS_REPORT)) {
4616 /* don't care */;
4617 } else {
4618 if ((ptype & 0x8000) == 0x0000) {
4619 /* must stop processing the rest of
4620 * the param's. Any report bits were
4621 * handled with the call to sctp_arethere_unrecognized_parameters()
4622 * when the INIT or INIT-ACK was first seen.
4623 */
4624 break;
4625 }
4626 }
4627 offset += SCTP_SIZE32(plen);
4628 if (offset >= limit) {
4629 break;
4630 }
4631 phdr = sctp_get_next_param(m, offset, &parm_buf,
4632 sizeof(parm_buf));
4633 }
4634 /* Now check to see if we need to purge any addresses */
4635 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
4636 net_tmp = TAILQ_NEXT(net, sctp_next);
4637 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
4638 SCTP_ADDR_NOT_IN_ASSOC) {
4639 /* This address has been removed from the asoc */
4640 /* remove and free it */
4641 stcb->asoc.numnets--;
4642 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
4643 sctp_free_remote_addr(net);
4644 if (net == stcb->asoc.primary_destination) {
4645 stcb->asoc.primary_destination = NULL;
4646 sctp_select_primary_destination(stcb);
4647 }
4648 }
4649 }
4650 return (0);
4651 }
4652
4653 int
4654 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
4655 struct sctp_nets *net)
4656 {
4657 /* make sure the requested primary address exists in the assoc */
4658 if (net == NULL && sa)
4659 net = sctp_findnet(stcb, sa);
4660
4661 if (net == NULL) {
4662 /* didn't find the requested primary address! */
4663 return (-1);
4664 } else {
4665 /* set the primary address */
4666 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
4667 /* Must be confirmed */
4668 return (-1);
4669 }
4670 stcb->asoc.primary_destination = net;
4671 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
4672 return (0);
4673 }
4674 }
4675
4676
4677 int
4678 sctp_is_vtag_good(struct sctp_inpcb *inp, u_int32_t tag, struct timeval *now)
4679 {
4680 /*
4681 * This function serves two purposes. It will see if a TAG can be
4682 * re-used and return 1 for yes it is ok and 0 for don't use that
4683 * tag.
4684 * A secondary function it will do is purge out old tags that can
4685 * be removed.
4686 */
4687 struct sctpasochead *head;
4688 struct sctpvtaghead *chain;
4689 struct sctp_tagblock *twait_block;
4690 struct sctp_tcb *stcb;
4691
4692 int i;
4693 SCTP_INP_INFO_WLOCK();
4694 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4695 /* First is the vtag in use ? */
4696
4697 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
4698 sctppcbinfo.hashasocmark)];
4699 if (head == NULL) {
4700 SCTP_INP_INFO_WUNLOCK();
4701 return (0);
4702 }
4703 LIST_FOREACH(stcb, head, sctp_asocs) {
4704 if (stcb->asoc.my_vtag == tag) {
4705 /* We should remove this if and
4706 * return 0 always if we want vtags
4707 * unique across all endpoints. For
4708 * now within a endpoint is ok.
4709 */
4710 if (inp == stcb->sctp_ep) {
4711 /* bad tag, in use */
4712 SCTP_INP_INFO_WUNLOCK();
4713 return (0);
4714 }
4715 }
4716 }
4717 if (!LIST_EMPTY(chain)) {
4718 /*
4719 * Block(s) are present, lets see if we have this tag in
4720 * the list
4721 */
4722 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4723 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4724 if (twait_block->vtag_block[i].v_tag == 0) {
4725 /* not used */
4726 continue;
4727 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
4728 now->tv_sec) {
4729 /* Audit expires this guy */
4730 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4731 twait_block->vtag_block[i].v_tag = 0;
4732 } else if (twait_block->vtag_block[i].v_tag ==
4733 tag) {
4734 /* Bad tag, sorry :< */
4735 SCTP_INP_INFO_WUNLOCK();
4736 return (0);
4737 }
4738 }
4739 }
4740 }
4741 /* Not found, ok to use the tag */
4742 SCTP_INP_INFO_WUNLOCK();
4743 return (1);
4744 }
4745
4746
4747 /*
4748 * Delete the address from the endpoint local address list
4749 * Lookup using a sockaddr address (ie. not an ifaddr)
4750 */
4751 int
4752 sctp_del_local_addr_ep_sa(struct sctp_inpcb *inp, struct sockaddr *sa)
4753 {
4754 struct sctp_laddr *laddr;
4755 struct sockaddr *l_sa;
4756 int found = 0;
4757 /* Here is another function I cannot find a
4758 * caller for. As such we SHOULD delete it
4759 * if we have no users. If we find a user that
4760 * user MUST have the INP locked.
4761 *
4762 */
4763
4764 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4765 /* You are already bound to all. You have it already */
4766 return (EINVAL);
4767 }
4768
4769 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4770 /* make sure the address exists */
4771 if (laddr->ifa == NULL)
4772 continue;
4773 if (laddr->ifa->ifa_addr == NULL)
4774 continue;
4775
4776 l_sa = laddr->ifa->ifa_addr;
4777 if (l_sa->sa_family == AF_INET6) {
4778 /* IPv6 address */
4779 struct sockaddr_in6 *sin1, *sin2;
4780 sin1 = (struct sockaddr_in6 *)l_sa;
4781 sin2 = (struct sockaddr_in6 *)sa;
4782 if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
4783 sizeof(struct in6_addr)) == 0) {
4784 /* matched */
4785 found = 1;
4786 break;
4787 }
4788 } else if (l_sa->sa_family == AF_INET) {
4789 /* IPv4 address */
4790 struct sockaddr_in *sin1, *sin2;
4791 sin1 = (struct sockaddr_in *)l_sa;
4792 sin2 = (struct sockaddr_in *)sa;
4793 if (sin1->sin_addr.s_addr == sin2->sin_addr.s_addr) {
4794 /* matched */
4795 found = 1;
4796 break;
4797 }
4798 } else {
4799 /* invalid family */
4800 return (-1);
4801 }
4802 }
4803
4804 if (found && inp->laddr_count < 2) {
4805 /* can't delete unless there are at LEAST 2 addresses */
4806 return (-1);
4807 }
4808
4809 if (found && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
4810 /*
4811 * remove it from the ep list, this should NOT be
4812 * done until its really gone from the interface list and
4813 * we won't be receiving more of these. Probably right
4814 * away. If we do allow a removal of an address from
4815 * an association (sub-set bind) than this should NOT
4816 * be called until the all ASCONF come back from this
4817 * association.
4818 */
4819 sctp_remove_laddr(laddr);
4820 return (0);
4821 } else {
4822 return (-1);
4823 }
4824 }
4825
4826 static void
4827 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4828 {
4829 /*
4830 * We must hunt this association for MBUF's past the cumack
4831 * (i.e. out of order data that we can renege on).
4832 */
4833 struct sctp_association *asoc;
4834 struct sctp_tmit_chunk *chk, *nchk;
4835 u_int32_t cumulative_tsn_p1, tsn;
4836 int cnt, strmat, gap;
4837 /* We look for anything larger than the cum-ack + 1 */
4838
4839 asoc = &stcb->asoc;
4840 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
4841 cnt = 0;
4842 /* First look in the re-assembly queue */
4843 chk = TAILQ_FIRST(&asoc->reasmqueue);
4844 while (chk) {
4845 /* Get the next one */
4846 nchk = TAILQ_NEXT(chk, sctp_next);
4847 if (compare_with_wrap(chk->rec.data.TSN_seq,
4848 cumulative_tsn_p1, MAX_TSN)) {
4849 /* Yep it is above cum-ack */
4850 cnt++;
4851 tsn = chk->rec.data.TSN_seq;
4852 if (tsn >= asoc->mapping_array_base_tsn) {
4853 gap = tsn - asoc->mapping_array_base_tsn;
4854 } else {
4855 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
4856 tsn + 1;
4857 }
4858 asoc->size_on_reasm_queue -= chk->send_size;
4859 asoc->cnt_on_reasm_queue--;
4860 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
4861 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4862 if (chk->data) {
4863 sctp_m_freem(chk->data);
4864 chk->data = NULL;
4865 }
4866 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4867 sctppcbinfo.ipi_count_chunk--;
4868 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4869 panic("Chunk count is negative");
4870 }
4871 sctppcbinfo.ipi_gencnt_chunk++;
4872 }
4873 chk = nchk;
4874 }
4875 /* Ok that was fun, now we will drain all the inbound streams? */
4876 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
4877 chk = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
4878 while (chk) {
4879 nchk = TAILQ_NEXT(chk, sctp_next);
4880 if (compare_with_wrap(chk->rec.data.TSN_seq,
4881 cumulative_tsn_p1, MAX_TSN)) {
4882 /* Yep it is above cum-ack */
4883 cnt++;
4884 tsn = chk->rec.data.TSN_seq;
4885 if (tsn >= asoc->mapping_array_base_tsn) {
4886 gap = tsn -
4887 asoc->mapping_array_base_tsn;
4888 } else {
4889 gap = (MAX_TSN -
4890 asoc->mapping_array_base_tsn) +
4891 tsn + 1;
4892 }
4893 asoc->size_on_all_streams -= chk->send_size;
4894 asoc->cnt_on_all_streams--;
4895
4896 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
4897 gap);
4898 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
4899 chk, sctp_next);
4900 if (chk->data) {
4901 sctp_m_freem(chk->data);
4902 chk->data = NULL;
4903 }
4904 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4905 sctppcbinfo.ipi_count_chunk--;
4906 if ((int)sctppcbinfo.ipi_count_chunk < 0) {
4907 panic("Chunk count is negative");
4908 }
4909 sctppcbinfo.ipi_gencnt_chunk++;
4910 }
4911 chk = nchk;
4912 }
4913 }
4914 /*
4915 * Question, should we go through the delivery queue?
4916 * The only reason things are on here is the app not reading OR a
4917 * p-d-api up. An attacker COULD send enough in to initiate the
4918 * PD-API and then send a bunch of stuff to other streams... these
4919 * would wind up on the delivery queue.. and then we would not get
4920 * to them. But in order to do this I then have to back-track and
4921 * un-deliver sequence numbers in streams.. el-yucko. I think for
4922 * now we will NOT look at the delivery queue and leave it to be
4923 * something to consider later. An alternative would be to abort
4924 * the P-D-API with a notification and then deliver the data....
4925 * Or another method might be to keep track of how many times the
4926 * situation occurs and if we see a possible attack underway just
4927 * abort the association.
4928 */
4929 #ifdef SCTP_DEBUG
4930 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4931 if (cnt) {
4932 kprintf("Freed %d chunks from reneg harvest\n", cnt);
4933 }
4934 }
4935 #endif /* SCTP_DEBUG */
4936
4937 /*
4938 * Another issue, in un-setting the TSN's in the mapping array we
4939 * DID NOT adjust the higest_tsn marker. This will cause one of
4940 * two things to occur. It may cause us to do extra work in checking
4941 * for our mapping array movement. More importantly it may cause us
4942 * to SACK every datagram. This may not be a bad thing though since
4943 * we will recover once we get our cum-ack above and all this stuff
4944 * we dumped recovered.
4945 */
4946 }
4947
4948 void
4949 sctp_drain(void)
4950 {
4951 /*
4952 * We must walk the PCB lists for ALL associations here. The system
4953 * is LOW on MBUF's and needs help. This is where reneging will
4954 * occur. We really hope this does NOT happen!
4955 */
4956 struct sctp_inpcb *inp;
4957 struct sctp_tcb *stcb;
4958
4959 SCTP_INP_INFO_RLOCK();
4960 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
4961 /* For each endpoint */
4962 SCTP_INP_RLOCK(inp);
4963 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4964 /* For each association */
4965 SCTP_TCB_LOCK(stcb);
4966 sctp_drain_mbufs(inp, stcb);
4967 SCTP_TCB_UNLOCK(stcb);
4968 }
4969 SCTP_INP_RUNLOCK(inp);
4970 }
4971 SCTP_INP_INFO_RUNLOCK();
4972 }
4973
4974 int
4975 sctp_add_to_socket_q(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4976 {
4977 struct sctp_socket_q_list *sq;
4978
4979 /* write lock on INP assumed */
4980 if ((inp == NULL) || (stcb == NULL)) {
4981 /* I am paranoid */
4982 return (0);
4983 }
4984 sq = (struct sctp_socket_q_list *)SCTP_ZONE_GET(
4985 sctppcbinfo.ipi_zone_sockq);
4986 if (sq == NULL) {
4987 /* out of sq structs */
4988 return (0);
4989 }
4990 sctppcbinfo.ipi_count_sockq++;
4991 sctppcbinfo.ipi_gencnt_sockq++;
4992 if (stcb)
4993 stcb->asoc.cnt_msg_on_sb++;
4994 sq->tcb = stcb;
4995 TAILQ_INSERT_TAIL(&inp->sctp_queue_list, sq, next_sq);
4996 return (1);
4997 }
4998
4999
5000 struct sctp_tcb *
5001 sctp_remove_from_socket_q(struct sctp_inpcb *inp)
5002 {
5003 struct sctp_tcb *stcb = NULL;
5004 struct sctp_socket_q_list *sq;
5005
5006 /* W-Lock on INP assumed held */
5007 sq = TAILQ_FIRST(&inp->sctp_queue_list);
5008 if (sq == NULL)
5009 return (NULL);
5010
5011 stcb = sq->tcb;
5012 TAILQ_REMOVE(&inp->sctp_queue_list, sq, next_sq);
5013 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_sockq, sq);
5014 sctppcbinfo.ipi_count_sockq--;
5015 sctppcbinfo.ipi_gencnt_sockq++;
5016 if (stcb) {
5017 stcb->asoc.cnt_msg_on_sb--;
5018 }
5019 return (stcb);
5020 }
5021
5022 int
5023 sctp_initiate_iterator(asoc_func af, uint32_t pcb_state, uint32_t asoc_state,
5024 void *argp, uint32_t argi, end_func ef,
5025 struct sctp_inpcb *s_inp)
5026 {
5027 struct sctp_iterator *it=NULL;
5028
5029 if (af == NULL) {
5030 return (-1);
5031 }
5032 MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), M_PCB,
5033 M_WAITOK);
5034 if (it == NULL) {
5035 return (ENOMEM);
5036 }
5037 memset(it, 0, sizeof(*it));
5038 it->function_toapply = af;
5039 it->function_atend = ef;
5040 it->pointer = argp;
5041 it->val = argi;
5042 it->pcb_flags = pcb_state;
5043 it->asoc_state = asoc_state;
5044 if (s_inp) {
5045 it->inp = s_inp;
5046 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5047 } else {
5048 SCTP_INP_INFO_RLOCK();
5049 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5050 SCTP_INP_INFO_RUNLOCK();
5051 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5052
5053 }
5054 /* Init the timer */
5055 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
5056 callout_init(&it->tmr.timer, 0);
5057 #else
5058 callout_init(&it->tmr.timer);
5059 #endif
5060 /* add to the list of all iterators */
5061 SCTP_INP_INFO_WLOCK();
5062 LIST_INSERT_HEAD(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5063 SCTP_INP_INFO_WUNLOCK();
5064 crit_enter();
5065 sctp_iterator_timer(it);
5066 crit_exit();
5067 return (0);
5068 }
5069
5070
5071 /*
5072 * Callout/Timer routines for OS that doesn't have them
5073 */
5074 #ifdef _SCTP_NEEDS_CALLOUT_
5075 #ifndef __APPLE__
5076 extern int ticks;
5077 #endif
5078
5079 void
5080 callout_init(struct callout *c)
5081 {
5082 bzero(c, sizeof(*c));
5083 }
5084
5085 void
5086 callout_reset(struct callout *c, int to_ticks, void (*ftn)(void *), void *arg)
5087 {
5088 crit_enter();
5089 if (c->c_flags & CALLOUT_PENDING)
5090 callout_stop(c);
5091
5092 /*
5093 * We could spl down here and back up at the TAILQ_INSERT_TAIL,
5094 * but there's no point since doing this setup doesn't take much
5095 * time.
5096 */
5097 if (to_ticks <= 0)
5098 to_ticks = 1;
5099
5100 c->c_arg = arg;
5101 c->c_flags = (CALLOUT_ACTIVE | CALLOUT_PENDING);
5102 c->c_func = ftn;
5103 #ifdef __APPLE__
5104 c->c_time = to_ticks; /* just store the requested timeout */
5105 timeout(ftn, arg, to_ticks);
5106 #else
5107 c->c_time = ticks + to_ticks;
5108 TAILQ_INSERT_TAIL(&sctppcbinfo.callqueue, c, tqe);
5109 #endif
5110 crit_exit();
5111 }
5112
5113 int
5114 callout_stop(struct callout *c)
5115 {
5116 crit_enter();
5117 /*
5118 * Don't attempt to delete a callout that's not on the queue.
5119 */
5120 if (!(c->c_flags & CALLOUT_PENDING)) {
5121 c->c_flags &= ~CALLOUT_ACTIVE;
5122 crit_exit();
5123 return (0);
5124 }
5125 c->c_flags &= ~(CALLOUT_ACTIVE | CALLOUT_PENDING| CALLOUT_FIRED);
5126 #ifdef __APPLE__
5127 /* thread_call_cancel(c->c_call); */
5128 untimeout(c->c_func, c->c_arg);
5129 #else
5130 TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5131 c->c_func = NULL;
5132 #endif
5133 crit_exit();
5134 return (1);
5135 }
5136
5137 #if !defined(__APPLE__)
5138 void
5139 sctp_fasttim(void)
5140 {
5141 struct callout *c, *n;
5142 struct calloutlist locallist;
5143 int inited = 0;
5144
5145 crit_enter();
5146 /* run through and subtract and mark all callouts */
5147 c = TAILQ_FIRST(&sctppcbinfo.callqueue);
5148 while (c) {
5149 n = TAILQ_NEXT(c, tqe);
5150 if (c->c_time <= ticks) {
5151 c->c_flags |= CALLOUT_FIRED;
5152 c->c_time = 0;
5153 TAILQ_REMOVE(&sctppcbinfo.callqueue, c, tqe);
5154 if (inited == 0) {
5155 TAILQ_INIT(&locallist);
5156 inited = 1;
5157 }
5158 /* move off of main list */
5159 TAILQ_INSERT_TAIL(&locallist, c, tqe);
5160 }
5161 c = n;
5162 }
5163 /* Now all the ones on the locallist must be called */
5164 if (inited) {
5165 c = TAILQ_FIRST(&locallist);
5166 while (c) {
5167 /* remove it */
5168 TAILQ_REMOVE(&locallist, c, tqe);
5169 /* now validate that it did not get canceled */
5170 if (c->c_flags & CALLOUT_FIRED) {
5171 c->c_flags &= ~CALLOUT_PENDING;
5172 crit_exit();
5173 (*c->c_func)(c->c_arg);
5174 crit_enter();
5175 }
5176 c = TAILQ_FIRST(&locallist);
5177 }
5178 }
5179 crit_exit();
5180 }
5181 #endif
5182 #endif /* _SCTP_NEEDS_CALLOUT_ */
MP support for (parts of) the network stack