35
36#include <netinet/sctp_os.h>
37#include <sys/proc.h>
38#include <netinet/sctp_var.h>
39#include <netinet/sctp_sysctl.h>
40#include <netinet/sctp_pcb.h>
41#include <netinet/sctputil.h>
42#include <netinet/sctp.h>
43#include <netinet/sctp_header.h>
44#include <netinet/sctp_asconf.h>
45#include <netinet/sctp_output.h>
46#include <netinet/sctp_timer.h>
47#include <netinet/sctp_bsd_addr.h>
48
49
50struct sctp_epinfo sctppcbinfo;
51
52/* FIX: we don't handle multiple link local scopes */
53/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
54int
55SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
56{
57 struct in6_addr tmp_a, tmp_b;
58
59 /* use a copy of a and b */
60 tmp_a = *a;
61 tmp_b = *b;
62 in6_clearscope(&tmp_a);
63 in6_clearscope(&tmp_b);
64 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
65}
66
67void
68sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
69{
70 /*
71 * We really don't need to lock this, but I will just because it
72 * does not hurt.
73 */
74 SCTP_INP_INFO_RLOCK();
75 spcb->ep_count = sctppcbinfo.ipi_count_ep;
76 spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
77 spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
78 spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
79 spcb->chk_count = sctppcbinfo.ipi_count_chunk;
80 spcb->readq_count = sctppcbinfo.ipi_count_readq;
81 spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
82 spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
83
84 SCTP_INP_INFO_RUNLOCK();
85}
86
87/*
88 * Addresses are added to VRF's (Virtual Router's). For BSD we
89 * have only the default VRF 0. We maintain a hash list of
90 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
91 * these has a list of addresses. When we add a new address
92 * to a VRF we lookup the ifn/ifn_index, if the ifn does
93 * not exist we create it and add it to the list of IFN's
94 * within the VRF. Once we have the sctp_ifn, we add the
95 * address to the list. So we look something like:
96 *
97 * hash-vrf-table
98 * vrf-> ifn-> ifn -> ifn
99 * vrf |
100 * ... +--ifa-> ifa -> ifa
101 * vrf
102 *
103 * We keep these seperate lists since the SCTP subsystem will
104 * point to these from its source address selection nets structure.
105 * When an address is deleted it does not happen right away on
106 * the SCTP side, it gets scheduled. What we do when a
107 * delete happens is immediately remove the address from
108 * the master list and decrement the refcount. As our
109 * addip iterator works through and frees the src address
110 * selection pointing to the sctp_ifa, eventually the refcount
111 * will reach 0 and we will delete it. Note that it is assumed
112 * that any locking on system level ifn/ifa is done at the
113 * caller of these functions and these routines will only
114 * lock the SCTP structures as they add or delete things.
115 *
116 * Other notes on VRF concepts.
117 * - An endpoint can be in multiple VRF's
118 * - An association lives within a VRF and only one VRF.
119 * - Any incoming packet we can deduce the VRF for by
120 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
121 * - Any downward send call or connect call must supply the
122 * VRF via ancillary data or via some sort of set default
123 * VRF socket option call (again for BSD no brainer since
124 * the VRF is always 0).
125 * - An endpoint may add multiple VRF's to it.
126 * - Listening sockets can accept associations in any
127 * of the VRF's they are in but the assoc will end up
128 * in only one VRF (gotten from the packet or connect/send).
129 *
130 */
131
132struct sctp_vrf *
133sctp_allocate_vrf(int vrf_id)
134{
135 struct sctp_vrf *vrf = NULL;
136 struct sctp_vrflist *bucket;
137
138 /* First allocate the VRF structure */
139 vrf = sctp_find_vrf(vrf_id);
140 if (vrf) {
141 /* Already allocated */
142 return (vrf);
143 }
144 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
145 SCTP_M_VRF);
146 if (vrf == NULL) {
147 /* No memory */
148#ifdef INVARIANTS
149 panic("No memory for VRF:%d", vrf_id);
150#endif
151 return (NULL);
152 }
153 /* setup the VRF */
154 memset(vrf, 0, sizeof(struct sctp_vrf));
155 vrf->vrf_id = vrf_id;
156 LIST_INIT(&vrf->ifnlist);
157 vrf->total_ifa_count = 0;
158 vrf->refcount = 0;
159 /* now also setup table ids */
160 SCTP_INIT_VRF_TABLEID(vrf);
161 /* Init the HASH of addresses */
162 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
163 &vrf->vrf_addr_hashmark);
164 if (vrf->vrf_addr_hash == NULL) {
165 /* No memory */
166#ifdef INVARIANTS
167 panic("No memory for VRF:%d", vrf_id);
168#endif
169 SCTP_FREE(vrf, SCTP_M_VRF);
170 return (NULL);
171 }
172 /* Add it to the hash table */
173 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
174 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
175 atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1);
176 return (vrf);
177}
178
179
180struct sctp_ifn *
181sctp_find_ifn(void *ifn, uint32_t ifn_index)
182{
183 struct sctp_ifn *sctp_ifnp;
184 struct sctp_ifnlist *hash_ifn_head;
185
186 /*
187 * We assume the lock is held for the addresses if thats wrong
188 * problems could occur :-)
189 */
190 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
191 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
192 if (sctp_ifnp->ifn_index == ifn_index) {
193 return (sctp_ifnp);
194 }
195 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
196 return (sctp_ifnp);
197 }
198 }
199 return (NULL);
200}
201
202
203
204struct sctp_vrf *
205sctp_find_vrf(uint32_t vrf_id)
206{
207 struct sctp_vrflist *bucket;
208 struct sctp_vrf *liste;
209
210 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
211 LIST_FOREACH(liste, bucket, next_vrf) {
212 if (vrf_id == liste->vrf_id) {
213 return (liste);
214 }
215 }
216 return (NULL);
217}
218
219void
220sctp_free_vrf(struct sctp_vrf *vrf)
221{
222 int ret;
223
224 ret = atomic_fetchadd_int(&vrf->refcount, -1);
225 if (ret == 1) {
226 /* We zero'd the count */
227 LIST_REMOVE(vrf, next_vrf);
228 SCTP_FREE(vrf, SCTP_M_VRF);
229 atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1);
230 }
231}
232
233void
234sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
235{
236 int ret;
237
238 ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1);
239 if (ret == 1) {
240 /* We zero'd the count */
241 if (sctp_ifnp->vrf) {
242 sctp_free_vrf(sctp_ifnp->vrf);
243 }
244 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
245 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1);
246 }
247}
248
249void
250sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
251{
252 struct sctp_ifn *sctp_ifnp;
253
254 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
255 if (sctp_ifnp != NULL) {
256 sctp_ifnp->ifn_mtu = mtu;
257 }
258}
259
260
261void
262sctp_free_ifa(struct sctp_ifa *sctp_ifap)
263{
264 int ret;
265
266 ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
267 if (ret == 1) {
268 /* We zero'd the count */
269 if (sctp_ifap->ifn_p) {
270 sctp_free_ifn(sctp_ifap->ifn_p);
271 }
272 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
273 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1);
274 }
275}
276
277static void
278sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
279{
280 struct sctp_ifn *found;
281
282 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
283 if (found == NULL) {
284 /* Not in the list.. sorry */
285 return;
286 }
287 if (hold_addr_lock == 0)
288 SCTP_IPI_ADDR_LOCK();
289 LIST_REMOVE(sctp_ifnp, next_bucket);
290 LIST_REMOVE(sctp_ifnp, next_ifn);
291 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
292 sctp_ifnp->registered_af);
293 if (hold_addr_lock == 0)
294 SCTP_IPI_ADDR_UNLOCK();
295 /* Take away the reference, and possibly free it */
296 sctp_free_ifn(sctp_ifnp);
297}
298
299
300struct sctp_ifa *
301sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
302 uint32_t ifn_type, const char *if_name,
303 void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
304 int dynamic_add)
305{
306 struct sctp_vrf *vrf;
307 struct sctp_ifn *sctp_ifnp = NULL;
308 struct sctp_ifa *sctp_ifap = NULL;
309 struct sctp_ifalist *hash_addr_head;
310 struct sctp_ifnlist *hash_ifn_head;
311 uint32_t hash_of_addr;
312 int new_ifn_af = 0;
313
314 /* How granular do we need the locks to be here? */
315 SCTP_IPI_ADDR_LOCK();
316 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
317 if (sctp_ifnp) {
318 vrf = sctp_ifnp->vrf;
319 } else {
320 vrf = sctp_find_vrf(vrf_id);
321 if (vrf == NULL) {
322 vrf = sctp_allocate_vrf(vrf_id);
323 if (vrf == NULL) {
324 SCTP_IPI_ADDR_UNLOCK();
325 return (NULL);
326 }
327 }
328 }
329 if (sctp_ifnp == NULL) {
330 /*
331 * build one and add it, can't hold lock until after malloc
332 * done though.
333 */
334 SCTP_IPI_ADDR_UNLOCK();
335 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN);
336 if (sctp_ifnp == NULL) {
337#ifdef INVARIANTS
338 panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
339#endif
340 return (NULL);
341 }
342 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
343 sctp_ifnp->ifn_index = ifn_index;
344 sctp_ifnp->ifn_p = ifn;
345 sctp_ifnp->ifn_type = ifn_type;
346 sctp_ifnp->refcount = 1;
347 sctp_ifnp->vrf = vrf;
348
349 atomic_add_int(&vrf->refcount, 1);
350 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
351 if (if_name != NULL) {
352 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
353 } else {
354 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
355 }
356 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
357 LIST_INIT(&sctp_ifnp->ifalist);
358 SCTP_IPI_ADDR_LOCK();
359 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
360 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
361 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1);
362 new_ifn_af = 1;
363 }
364 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
365 if (sctp_ifap) {
366 /* Hmm, it already exists? */
367 if ((sctp_ifap->ifn_p) &&
368 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
369 if (new_ifn_af) {
370 /* Remove the created one that we don't want */
371 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
372 }
373 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
374 /* easy to solve, just switch back to active */
375 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
376 sctp_ifap->ifn_p = sctp_ifnp;
377 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
378 exit_stage_left:
379 SCTP_IPI_ADDR_UNLOCK();
380 return (sctp_ifap);
381 } else {
382 goto exit_stage_left;
383 }
384 } else {
385 if (sctp_ifap->ifn_p) {
386 /*
387 * The first IFN gets the address,
388 * duplicates are ignored.
389 */
390 if (new_ifn_af) {
391 /*
392 * Remove the created one that we
393 * don't want
394 */
395 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
396 }
397 goto exit_stage_left;
398 } else {
399 /* repair ifnp which was NULL ? */
400 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
401 sctp_ifap->ifn_p = sctp_ifnp;
402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
403 }
404 goto exit_stage_left;
405 }
406 }
407 SCTP_IPI_ADDR_UNLOCK();
408 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
409 if (sctp_ifap == NULL) {
410#ifdef INVARIANTS
411 panic("No memory for IFA");
412#endif
413 return (NULL);
414 }
415 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
416 sctp_ifap->ifn_p = sctp_ifnp;
417 atomic_add_int(&sctp_ifnp->refcount, 1);
418 sctp_ifap->vrf_id = vrf_id;
419 sctp_ifap->ifa = ifa;
420 memcpy(&sctp_ifap->address, addr, addr->sa_len);
421 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
422 sctp_ifap->flags = ifa_flags;
423 /* Set scope */
424 if (sctp_ifap->address.sa.sa_family == AF_INET) {
425 struct sockaddr_in *sin;
426
427 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
428 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
429 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
430 sctp_ifap->src_is_loop = 1;
431 }
432 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
433 sctp_ifap->src_is_priv = 1;
434 }
435 sctp_ifnp->num_v4++;
436 if (new_ifn_af)
437 new_ifn_af = AF_INET;
438 } else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
439 /* ok to use deprecated addresses? */
440 struct sockaddr_in6 *sin6;
441
442 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
443 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
444 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
445 sctp_ifap->src_is_loop = 1;
446 }
447 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
448 sctp_ifap->src_is_priv = 1;
449 }
450 sctp_ifnp->num_v6++;
451 if (new_ifn_af)
452 new_ifn_af = AF_INET6;
453 } else {
454 new_ifn_af = 0;
455 }
456 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
457
458 if ((sctp_ifap->src_is_priv == 0) &&
459 (sctp_ifap->src_is_loop == 0)) {
460 sctp_ifap->src_is_glob = 1;
461 }
462 SCTP_IPI_ADDR_LOCK();
463 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
464 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
465 sctp_ifap->refcount = 1;
466 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
467 sctp_ifnp->ifa_count++;
468 vrf->total_ifa_count++;
469 atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1);
470 if (new_ifn_af) {
471 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
472 sctp_ifnp->registered_af = new_ifn_af;
473 }
474 SCTP_IPI_ADDR_UNLOCK();
475 if (dynamic_add) {
476 /*
477 * Bump up the refcount so that when the timer completes it
478 * will drop back down.
479 */
480 struct sctp_laddr *wi;
481
482 atomic_add_int(&sctp_ifap->refcount, 1);
483 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
484 if (wi == NULL) {
485 /*
486 * Gak, what can we do? We have lost an address
487 * change can you say HOSED?
488 */
489 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
490 /* Opps, must decrement the count */
491 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index);
492 return (NULL);
493 }
494 SCTP_INCR_LADDR_COUNT();
495 bzero(wi, sizeof(*wi));
496 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
497 wi->ifa = sctp_ifap;
498 wi->action = SCTP_ADD_IP_ADDRESS;
499 SCTP_IPI_ITERATOR_WQ_LOCK();
500 /*
501 * Should this really be a tailq? As it is we will process
502 * the newest first :-0
503 */
504 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
505 SCTP_IPI_ITERATOR_WQ_UNLOCK();
506 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
507 (struct sctp_inpcb *)NULL,
508 (struct sctp_tcb *)NULL,
509 (struct sctp_nets *)NULL);
510 } else {
511 /* it's ready for use */
512 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
513 }
514 return (sctp_ifap);
515}
516
517void
518sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
519 uint32_t ifn_index)
520{
521 struct sctp_vrf *vrf;
522 struct sctp_ifa *sctp_ifap = NULL;
523
524 SCTP_IPI_ADDR_LOCK();
525
526 vrf = sctp_find_vrf(vrf_id);
527 if (vrf == NULL) {
528 SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id);
529 goto out_now;
530 }
531 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
532 if (sctp_ifap) {
533 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
534 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
535 vrf->total_ifa_count--;
536 LIST_REMOVE(sctp_ifap, next_bucket);
537 LIST_REMOVE(sctp_ifap, next_ifa);
538 if (sctp_ifap->ifn_p) {
539 sctp_ifap->ifn_p->ifa_count--;
540 if (sctp_ifap->address.sa.sa_family == AF_INET6)
541 sctp_ifap->ifn_p->num_v6--;
542 else if (sctp_ifap->address.sa.sa_family == AF_INET)
543 sctp_ifap->ifn_p->num_v4--;
544 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
545 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
546 } else {
547 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
548 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
549 SCTP_DEREGISTER_INTERFACE(ifn_index,
550 AF_INET6);
551 SCTP_REGISTER_INTERFACE(ifn_index,
552 AF_INET);
553 sctp_ifap->ifn_p->registered_af = AF_INET;
554 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
555 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
556 SCTP_DEREGISTER_INTERFACE(ifn_index,
557 AF_INET);
558 SCTP_REGISTER_INTERFACE(ifn_index,
559 AF_INET6);
560 sctp_ifap->ifn_p->registered_af = AF_INET6;
561 }
562 }
563 sctp_free_ifn(sctp_ifap->ifn_p);
564 sctp_ifap->ifn_p = NULL;
565 }
566 }
567#ifdef SCTP_DEBUG
568 else {
569 SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:",
570 ifn_index);
571 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
572 }
573#endif
574
575out_now:
576 SCTP_IPI_ADDR_UNLOCK();
577 if (sctp_ifap) {
578 struct sctp_laddr *wi;
579
580 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
581 if (wi == NULL) {
582 /*
583 * Gak, what can we do? We have lost an address
584 * change can you say HOSED?
585 */
586 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
587
588 /* Opps, must decrement the count */
589 sctp_free_ifa(sctp_ifap);
590 return;
591 }
592 SCTP_INCR_LADDR_COUNT();
593 bzero(wi, sizeof(*wi));
594 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
595 wi->ifa = sctp_ifap;
596 wi->action = SCTP_DEL_IP_ADDRESS;
597 SCTP_IPI_ITERATOR_WQ_LOCK();
598 /*
599 * Should this really be a tailq? As it is we will process
600 * the newest first :-0
601 */
602 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
603 SCTP_IPI_ITERATOR_WQ_UNLOCK();
604
605 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
606 (struct sctp_inpcb *)NULL,
607 (struct sctp_tcb *)NULL,
608 (struct sctp_nets *)NULL);
609 }
610 return;
611}
612
613
614
615static struct sctp_tcb *
616sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
617 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
618{
619 /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
620 /*
621 * If we support the TCP model, then we must now dig through to see
622 * if we can find our endpoint in the list of tcp ep's.
623 */
624 uint16_t lport, rport;
625 struct sctppcbhead *ephead;
626 struct sctp_inpcb *inp;
627 struct sctp_laddr *laddr;
628 struct sctp_tcb *stcb;
629 struct sctp_nets *net;
630
631 if ((to == NULL) || (from == NULL)) {
632 return (NULL);
633 }
634 if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
635 lport = ((struct sockaddr_in *)to)->sin_port;
636 rport = ((struct sockaddr_in *)from)->sin_port;
637 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
638 lport = ((struct sockaddr_in6 *)to)->sin6_port;
639 rport = ((struct sockaddr_in6 *)from)->sin6_port;
640 } else {
641 return NULL;
642 }
643 ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
644 (lport + rport), sctppcbinfo.hashtcpmark)];
645 /*
646 * Ok now for each of the guys in this bucket we must look and see:
647 * - Does the remote port match. - Does there single association's
648 * addresses match this address (to). If so we update p_ep to point
649 * to this ep and return the tcb from it.
650 */
651 LIST_FOREACH(inp, ephead, sctp_hash) {
652 SCTP_INP_RLOCK(inp);
653 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
654 SCTP_INP_RUNLOCK(inp);
655 continue;
656 }
657 if (lport != inp->sctp_lport) {
658 SCTP_INP_RUNLOCK(inp);
659 continue;
660 }
661 if (inp->def_vrf_id != vrf_id) {
662 SCTP_INP_RUNLOCK(inp);
663 continue;
664 }
665 /* check to see if the ep has one of the addresses */
666 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
667 /* We are NOT bound all, so look further */
668 int match = 0;
669
670 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
671
672 if (laddr->ifa == NULL) {
673 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
674 continue;
675 }
676 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
677 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
678 continue;
679 }
680 if (laddr->ifa->address.sa.sa_family ==
681 to->sa_family) {
682 /* see if it matches */
683 struct sockaddr_in *intf_addr, *sin;
684
685 intf_addr = &laddr->ifa->address.sin;
686 sin = (struct sockaddr_in *)to;
687 if (from->sa_family == AF_INET) {
688 if (sin->sin_addr.s_addr ==
689 intf_addr->sin_addr.s_addr) {
690 match = 1;
691 break;
692 }
693 } else {
694 struct sockaddr_in6 *intf_addr6;
695 struct sockaddr_in6 *sin6;
696
697 sin6 = (struct sockaddr_in6 *)
698 to;
699 intf_addr6 = &laddr->ifa->address.sin6;
700
701 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
702 &intf_addr6->sin6_addr)) {
703 match = 1;
704 break;
705 }
706 }
707 }
708 }
709 if (match == 0) {
710 /* This endpoint does not have this address */
711 SCTP_INP_RUNLOCK(inp);
712 continue;
713 }
714 }
715 /*
716 * Ok if we hit here the ep has the address, does it hold
717 * the tcb?
718 */
719
720 stcb = LIST_FIRST(&inp->sctp_asoc_list);
721 if (stcb == NULL) {
722 SCTP_INP_RUNLOCK(inp);
723 continue;
724 }
725 SCTP_TCB_LOCK(stcb);
726 if (stcb->rport != rport) {
727 /* remote port does not match. */
728 SCTP_TCB_UNLOCK(stcb);
729 SCTP_INP_RUNLOCK(inp);
730 continue;
731 }
732 /* Does this TCB have a matching address? */
733 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
734
735 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
736 /* not the same family, can't be a match */
737 continue;
738 }
739 if (from->sa_family == AF_INET) {
740 struct sockaddr_in *sin, *rsin;
741
742 sin = (struct sockaddr_in *)&net->ro._l_addr;
743 rsin = (struct sockaddr_in *)from;
744 if (sin->sin_addr.s_addr ==
745 rsin->sin_addr.s_addr) {
746 /* found it */
747 if (netp != NULL) {
748 *netp = net;
749 }
750 /* Update the endpoint pointer */
751 *inp_p = inp;
752 SCTP_INP_RUNLOCK(inp);
753 return (stcb);
754 }
755 } else {
756 struct sockaddr_in6 *sin6, *rsin6;
757
758 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
759 rsin6 = (struct sockaddr_in6 *)from;
760 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
761 &rsin6->sin6_addr)) {
762 /* found it */
763 if (netp != NULL) {
764 *netp = net;
765 }
766 /* Update the endpoint pointer */
767 *inp_p = inp;
768 SCTP_INP_RUNLOCK(inp);
769 return (stcb);
770 }
771 }
772 }
773 SCTP_TCB_UNLOCK(stcb);
774 SCTP_INP_RUNLOCK(inp);
775 }
776 return (NULL);
777}
778
779/*
780 * rules for use
781 *
782 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
783 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
784 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
785 * NULL.
786 */
787
788struct sctp_tcb *
789sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
790 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
791{
792 struct sctpasochead *head;
793 struct sctp_inpcb *inp;
794 struct sctp_tcb *stcb = NULL;
795 struct sctp_nets *net;
796 uint16_t rport;
797
798 inp = *inp_p;
799 if (remote->sa_family == AF_INET) {
800 rport = (((struct sockaddr_in *)remote)->sin_port);
801 } else if (remote->sa_family == AF_INET6) {
802 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
803 } else {
804 return (NULL);
805 }
806 if (locked_tcb) {
807 /*
808 * UN-lock so we can do proper locking here this occurs when
809 * called from load_addresses_from_init.
810 */
811 SCTP_TCB_UNLOCK(locked_tcb);
812 }
813 SCTP_INP_INFO_RLOCK();
814 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
815 /*-
816 * Now either this guy is our listener or it's the
817 * connector. If it is the one that issued the connect, then
818 * it's only chance is to be the first TCB in the list. If
819 * it is the acceptor, then do the special_lookup to hash
820 * and find the real inp.
821 */
822 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
823 /* to is peer addr, from is my addr */
824 stcb = sctp_tcb_special_locate(inp_p, remote, local,
825 netp, inp->def_vrf_id);
826 if ((stcb != NULL) && (locked_tcb == NULL)) {
827 /* we have a locked tcb, lower refcount */
828 SCTP_INP_WLOCK(inp);
829 SCTP_INP_DECR_REF(inp);
830 SCTP_INP_WUNLOCK(inp);
831 }
832 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
833 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
834 SCTP_TCB_LOCK(locked_tcb);
835 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
836 }
837 SCTP_INP_INFO_RUNLOCK();
838 return (stcb);
839 } else {
840 SCTP_INP_WLOCK(inp);
841 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
842 goto null_return;
843 }
844 stcb = LIST_FIRST(&inp->sctp_asoc_list);
845 if (stcb == NULL) {
846 goto null_return;
847 }
848 SCTP_TCB_LOCK(stcb);
849 if (stcb->rport != rport) {
850 /* remote port does not match. */
851 SCTP_TCB_UNLOCK(stcb);
852 goto null_return;
853 }
854 /* now look at the list of remote addresses */
855 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
856#ifdef INVARIANTS
857 if (net == (TAILQ_NEXT(net, sctp_next))) {
858 panic("Corrupt net list");
859 }
860#endif
861 if (net->ro._l_addr.sa.sa_family !=
862 remote->sa_family) {
863 /* not the same family */
864 continue;
865 }
866 if (remote->sa_family == AF_INET) {
867 struct sockaddr_in *sin, *rsin;
868
869 sin = (struct sockaddr_in *)
870 &net->ro._l_addr;
871 rsin = (struct sockaddr_in *)remote;
872 if (sin->sin_addr.s_addr ==
873 rsin->sin_addr.s_addr) {
874 /* found it */
875 if (netp != NULL) {
876 *netp = net;
877 }
878 if (locked_tcb == NULL) {
879 SCTP_INP_DECR_REF(inp);
880 } else if (locked_tcb != stcb) {
881 SCTP_TCB_LOCK(locked_tcb);
882 }
883 SCTP_INP_WUNLOCK(inp);
884 SCTP_INP_INFO_RUNLOCK();
885 return (stcb);
886 }
887 } else if (remote->sa_family == AF_INET6) {
888 struct sockaddr_in6 *sin6, *rsin6;
889
890 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
891 rsin6 = (struct sockaddr_in6 *)remote;
892 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
893 &rsin6->sin6_addr)) {
894 /* found it */
895 if (netp != NULL) {
896 *netp = net;
897 }
898 if (locked_tcb == NULL) {
899 SCTP_INP_DECR_REF(inp);
900 } else if (locked_tcb != stcb) {
901 SCTP_TCB_LOCK(locked_tcb);
902 }
903 SCTP_INP_WUNLOCK(inp);
904 SCTP_INP_INFO_RUNLOCK();
905 return (stcb);
906 }
907 }
908 }
909 SCTP_TCB_UNLOCK(stcb);
910 }
911 } else {
912 SCTP_INP_WLOCK(inp);
913 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
914 goto null_return;
915 }
916 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
917 inp->sctp_hashmark)];
918 if (head == NULL) {
919 goto null_return;
920 }
921 LIST_FOREACH(stcb, head, sctp_tcbhash) {
922 if (stcb->rport != rport) {
923 /* remote port does not match */
924 continue;
925 }
926 /* now look at the list of remote addresses */
927 SCTP_TCB_LOCK(stcb);
928 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
929#ifdef INVARIANTS
930 if (net == (TAILQ_NEXT(net, sctp_next))) {
931 panic("Corrupt net list");
932 }
933#endif
934 if (net->ro._l_addr.sa.sa_family !=
935 remote->sa_family) {
936 /* not the same family */
937 continue;
938 }
939 if (remote->sa_family == AF_INET) {
940 struct sockaddr_in *sin, *rsin;
941
942 sin = (struct sockaddr_in *)
943 &net->ro._l_addr;
944 rsin = (struct sockaddr_in *)remote;
945 if (sin->sin_addr.s_addr ==
946 rsin->sin_addr.s_addr) {
947 /* found it */
948 if (netp != NULL) {
949 *netp = net;
950 }
951 if (locked_tcb == NULL) {
952 SCTP_INP_DECR_REF(inp);
953 } else if (locked_tcb != stcb) {
954 SCTP_TCB_LOCK(locked_tcb);
955 }
956 SCTP_INP_WUNLOCK(inp);
957 SCTP_INP_INFO_RUNLOCK();
958 return (stcb);
959 }
960 } else if (remote->sa_family == AF_INET6) {
961 struct sockaddr_in6 *sin6, *rsin6;
962
963 sin6 = (struct sockaddr_in6 *)
964 &net->ro._l_addr;
965 rsin6 = (struct sockaddr_in6 *)remote;
966 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
967 &rsin6->sin6_addr)) {
968 /* found it */
969 if (netp != NULL) {
970 *netp = net;
971 }
972 if (locked_tcb == NULL) {
973 SCTP_INP_DECR_REF(inp);
974 } else if (locked_tcb != stcb) {
975 SCTP_TCB_LOCK(locked_tcb);
976 }
977 SCTP_INP_WUNLOCK(inp);
978 SCTP_INP_INFO_RUNLOCK();
979 return (stcb);
980 }
981 }
982 }
983 SCTP_TCB_UNLOCK(stcb);
984 }
985 }
986null_return:
987 /* clean up for returning null */
988 if (locked_tcb) {
989 SCTP_TCB_LOCK(locked_tcb);
990 }
991 SCTP_INP_WUNLOCK(inp);
992 SCTP_INP_INFO_RUNLOCK();
993 /* not found */
994 return (NULL);
995}
996
997/*
998 * Find an association for a specific endpoint using the association id given
999 * out in the COMM_UP notification
1000 */
1001
1002struct sctp_tcb *
1003sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1004{
1005 /*
1006 * Use my the assoc_id to find a endpoint
1007 */
1008 struct sctpasochead *head;
1009 struct sctp_tcb *stcb;
1010 uint32_t id;
1011
1012 if (asoc_id == 0 || inp == NULL) {
1013 return (NULL);
1014 }
1015 SCTP_INP_INFO_RLOCK();
1016 id = (uint32_t) asoc_id;
1017 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
1018 sctppcbinfo.hashasocmark)];
1019 if (head == NULL) {
1020 /* invalid id TSNH */
1021 SCTP_INP_INFO_RUNLOCK();
1022 return (NULL);
1023 }
1024 LIST_FOREACH(stcb, head, sctp_asocs) {
1025 SCTP_INP_RLOCK(stcb->sctp_ep);
1026 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1027 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1028 SCTP_INP_INFO_RUNLOCK();
1029 return (NULL);
1030 }
1031 if (stcb->asoc.assoc_id == id) {
1032 /* candidate */
1033 if (inp != stcb->sctp_ep) {
1034 /*
1035 * some other guy has the same id active (id
1036 * collision ??).
1037 */
1038 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1039 continue;
1040 }
1041 if (want_lock) {
1042 SCTP_TCB_LOCK(stcb);
1043 }
1044 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1045 SCTP_INP_INFO_RUNLOCK();
1046 return (stcb);
1047 }
1048 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1049 }
1050 /* Ok if we missed here, lets try the restart hash */
1051 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
1052 if (head == NULL) {
1053 /* invalid id TSNH */
1054 SCTP_INP_INFO_RUNLOCK();
1055 return (NULL);
1056 }
1057 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
1058 SCTP_INP_RLOCK(stcb->sctp_ep);
1059 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1060 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1061 continue;
1062 }
1063 if (want_lock) {
1064 SCTP_TCB_LOCK(stcb);
1065 }
1066 if (stcb->asoc.assoc_id == id) {
1067 /* candidate */
1068 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1069 if (inp != stcb->sctp_ep) {
1070 /*
1071 * some other guy has the same id active (id
1072 * collision ??).
1073 */
1074 if (want_lock) {
1075 SCTP_TCB_UNLOCK(stcb);
1076 }
1077 continue;
1078 }
1079 SCTP_INP_INFO_RUNLOCK();
1080 return (stcb);
1081 } else {
1082 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1083 }
1084 if (want_lock) {
1085 SCTP_TCB_UNLOCK(stcb);
1086 }
1087 }
1088 SCTP_INP_INFO_RUNLOCK();
1089 return (NULL);
1090}
1091
1092
1093static struct sctp_inpcb *
1094sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1095 uint16_t lport, uint32_t vrf_id)
1096{
1097 struct sctp_inpcb *inp;
1098 struct sockaddr_in *sin;
1099 struct sockaddr_in6 *sin6;
1100 struct sctp_laddr *laddr;
1101 int fnd;
1102
1103 /*
1104 * Endpoing probe expects that the INP_INFO is locked.
1105 */
1106 if (nam->sa_family == AF_INET) {
1107 sin = (struct sockaddr_in *)nam;
1108 sin6 = NULL;
1109 } else if (nam->sa_family == AF_INET6) {
1110 sin6 = (struct sockaddr_in6 *)nam;
1111 sin = NULL;
1112 } else {
1113 /* unsupported family */
1114 return (NULL);
1115 }
1116 if (head == NULL)
1117 return (NULL);
1118 LIST_FOREACH(inp, head, sctp_hash) {
1119 SCTP_INP_RLOCK(inp);
1120 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1121 SCTP_INP_RUNLOCK(inp);
1122 continue;
1123 }
1124 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1125 (inp->sctp_lport == lport)) {
1126 /* got it */
1127 if ((nam->sa_family == AF_INET) &&
1128 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1129 SCTP_IPV6_V6ONLY(inp)) {
1130 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1131 SCTP_INP_RUNLOCK(inp);
1132 continue;
1133 }
1134 /* A V6 address and the endpoint is NOT bound V6 */
1135 if (nam->sa_family == AF_INET6 &&
1136 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1137 SCTP_INP_RUNLOCK(inp);
1138 continue;
1139 }
1140 /* does a VRF id match? */
1141 fnd = 0;
1142 if (inp->def_vrf_id == vrf_id)
1143 fnd = 1;
1144
1145 SCTP_INP_RUNLOCK(inp);
1146 if (!fnd)
1147 continue;
1148 return (inp);
1149 }
1150 SCTP_INP_RUNLOCK(inp);
1151 }
1152
1153 if ((nam->sa_family == AF_INET) &&
1154 (sin->sin_addr.s_addr == INADDR_ANY)) {
1155 /* Can't hunt for one that has no address specified */
1156 return (NULL);
1157 } else if ((nam->sa_family == AF_INET6) &&
1158 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1159 /* Can't hunt for one that has no address specified */
1160 return (NULL);
1161 }
1162 /*
1163 * ok, not bound to all so see if we can find a EP bound to this
1164 * address.
1165 */
1166 LIST_FOREACH(inp, head, sctp_hash) {
1167 SCTP_INP_RLOCK(inp);
1168 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1169 SCTP_INP_RUNLOCK(inp);
1170 continue;
1171 }
1172 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1173 SCTP_INP_RUNLOCK(inp);
1174 continue;
1175 }
1176 /*
1177 * Ok this could be a likely candidate, look at all of its
1178 * addresses
1179 */
1180 if (inp->sctp_lport != lport) {
1181 SCTP_INP_RUNLOCK(inp);
1182 continue;
1183 }
1184 /* does a VRF id match? */
1185 fnd = 0;
1186 if (inp->def_vrf_id == vrf_id)
1187 fnd = 1;
1188
1189 if (!fnd) {
1190 SCTP_INP_RUNLOCK(inp);
1191 continue;
1192 }
1193 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1194 if (laddr->ifa == NULL) {
1195 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1196 __FUNCTION__);
1197 continue;
1198 }
1199 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1200 laddr->ifa);
1201 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1202 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1203 continue;
1204 }
1205 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1206 /* possible, see if it matches */
1207 struct sockaddr_in *intf_addr;
1208
1209 intf_addr = &laddr->ifa->address.sin;
1210 if (nam->sa_family == AF_INET) {
1211 if (sin->sin_addr.s_addr ==
1212 intf_addr->sin_addr.s_addr) {
1213 SCTP_INP_RUNLOCK(inp);
1214 return (inp);
1215 }
1216 } else if (nam->sa_family == AF_INET6) {
1217 struct sockaddr_in6 *intf_addr6;
1218
1219 intf_addr6 = &laddr->ifa->address.sin6;
1220 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1221 &intf_addr6->sin6_addr)) {
1222 SCTP_INP_RUNLOCK(inp);
1223 return (inp);
1224 }
1225 }
1226 }
1227 }
1228 SCTP_INP_RUNLOCK(inp);
1229 }
1230 return (NULL);
1231}
1232
1233
1234struct sctp_inpcb *
1235sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1236 uint32_t vrf_id)
1237{
1238 /*
1239 * First we check the hash table to see if someone has this port
1240 * bound with just the port.
1241 */
1242 struct sctp_inpcb *inp;
1243 struct sctppcbhead *head;
1244 struct sockaddr_in *sin;
1245 struct sockaddr_in6 *sin6;
1246 int lport;
1247
1248 if (nam->sa_family == AF_INET) {
1249 sin = (struct sockaddr_in *)nam;
1250 lport = ((struct sockaddr_in *)nam)->sin_port;
1251 } else if (nam->sa_family == AF_INET6) {
1252 sin6 = (struct sockaddr_in6 *)nam;
1253 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1254 } else {
1255 /* unsupported family */
1256 return (NULL);
1257 }
1258 /*
1259 * I could cheat here and just cast to one of the types but we will
1260 * do it right. It also provides the check against an Unsupported
1261 * type too.
1262 */
1263 /* Find the head of the ALLADDR chain */
1264 if (have_lock == 0) {
1265 SCTP_INP_INFO_RLOCK();
1266
1267 }
1268 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1269 sctppcbinfo.hashmark)];
1270 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1271
1272 /*
1273 * If the TCP model exists it could be that the main listening
1274 * endpoint is gone but there exists a connected socket for this guy
1275 * yet. If so we can return the first one that we find. This may NOT
1276 * be the correct one but the sctp_findassociation_ep_addr has
1277 * further code to look at all TCP models.
1278 */
1279 if (inp == NULL && find_tcp_pool) {
1280 unsigned int i;
1281
1282 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1283 /*
1284 * This is real gross, but we do NOT have a remote
1285 * port at this point depending on who is calling.
1286 * We must therefore look for ANY one that matches
1287 * our local port :/
1288 */
1289 head = &sctppcbinfo.sctp_tcpephash[i];
1290 if (LIST_FIRST(head)) {
1291 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1292 if (inp) {
1293 /* Found one */
1294 break;
1295 }
1296 }
1297 }
1298 }
1299 if (inp) {
1300 SCTP_INP_INCR_REF(inp);
1301 }
1302 if (have_lock == 0) {
1303 SCTP_INP_INFO_RUNLOCK();
1304 }
1305 return (inp);
1306}
1307
1308/*
1309 * Find an association for an endpoint with the pointer to whom you want to
1310 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1311 * need to change the *to to some other struct like a mbuf...
1312 */
1313struct sctp_tcb *
1314sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1316 uint32_t vrf_id)
1317{
1318 struct sctp_inpcb *inp = NULL;
1319 struct sctp_tcb *retval;
1320
1321 SCTP_INP_INFO_RLOCK();
1322 if (find_tcp_pool) {
1323 if (inp_p != NULL) {
1324 retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1325 vrf_id);
1326 } else {
1327 retval = sctp_tcb_special_locate(&inp, from, to, netp,
1328 vrf_id);
1329 }
1330 if (retval != NULL) {
1331 SCTP_INP_INFO_RUNLOCK();
1332 return (retval);
1333 }
1334 }
1335 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1336 if (inp_p != NULL) {
1337 *inp_p = inp;
1338 }
1339 SCTP_INP_INFO_RUNLOCK();
1340
1341 if (inp == NULL) {
1342 return (NULL);
1343 }
1344 /*
1345 * ok, we have an endpoint, now lets find the assoc for it (if any)
1346 * we now place the source address or from in the to of the find
1347 * endpoint call. Since in reality this chain is used from the
1348 * inbound packet side.
1349 */
1350 if (inp_p != NULL) {
1351 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1352 NULL);
1353 } else {
1354 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1355 NULL);
1356 }
1357 return retval;
1358}
1359
1360
1361/*
1362 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1363 * find all addresses that the sender has specified in any address list. Each
1364 * address will be used to lookup the TCB and see if one exits.
1365 */
1366static struct sctp_tcb *
1367sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1368 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1369 struct sockaddr *dest)
1370{
1371 struct sockaddr_in sin4;
1372 struct sockaddr_in6 sin6;
1373 struct sctp_paramhdr *phdr, parm_buf;
1374 struct sctp_tcb *retval;
1375 uint32_t ptype, plen;
1376
1377 memset(&sin4, 0, sizeof(sin4));
1378 memset(&sin6, 0, sizeof(sin6));
1379 sin4.sin_len = sizeof(sin4);
1380 sin4.sin_family = AF_INET;
1381 sin4.sin_port = sh->src_port;
1382 sin6.sin6_len = sizeof(sin6);
1383 sin6.sin6_family = AF_INET6;
1384 sin6.sin6_port = sh->src_port;
1385
1386 retval = NULL;
1387 offset += sizeof(struct sctp_init_chunk);
1388
1389 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1390 while (phdr != NULL) {
1391 /* now we must see if we want the parameter */
1392 ptype = ntohs(phdr->param_type);
1393 plen = ntohs(phdr->param_length);
1394 if (plen == 0) {
1395 break;
1396 }
1397 if (ptype == SCTP_IPV4_ADDRESS &&
1398 plen == sizeof(struct sctp_ipv4addr_param)) {
1399 /* Get the rest of the address */
1400 struct sctp_ipv4addr_param ip4_parm, *p4;
1401
1402 phdr = sctp_get_next_param(m, offset,
1403 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1404 if (phdr == NULL) {
1405 return (NULL);
1406 }
1407 p4 = (struct sctp_ipv4addr_param *)phdr;
1408 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1409 /* look it up */
1410 retval = sctp_findassociation_ep_addr(inp_p,
1411 (struct sockaddr *)&sin4, netp, dest, NULL);
1412 if (retval != NULL) {
1413 return (retval);
1414 }
1415 } else if (ptype == SCTP_IPV6_ADDRESS &&
1416 plen == sizeof(struct sctp_ipv6addr_param)) {
1417 /* Get the rest of the address */
1418 struct sctp_ipv6addr_param ip6_parm, *p6;
1419
1420 phdr = sctp_get_next_param(m, offset,
1421 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1422 if (phdr == NULL) {
1423 return (NULL);
1424 }
1425 p6 = (struct sctp_ipv6addr_param *)phdr;
1426 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1427 /* look it up */
1428 retval = sctp_findassociation_ep_addr(inp_p,
1429 (struct sockaddr *)&sin6, netp, dest, NULL);
1430 if (retval != NULL) {
1431 return (retval);
1432 }
1433 }
1434 offset += SCTP_SIZE32(plen);
1435 phdr = sctp_get_next_param(m, offset, &parm_buf,
1436 sizeof(parm_buf));
1437 }
1438 return (NULL);
1439}
1440
1441
1442static struct sctp_tcb *
1443sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1444 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1445 uint16_t lport, int skip_src_check)
1446{
1447 /*
1448 * Use my vtag to hash. If we find it we then verify the source addr
1449 * is in the assoc. If all goes well we save a bit on rec of a
1450 * packet.
1451 */
1452 struct sctpasochead *head;
1453 struct sctp_nets *net;
1454 struct sctp_tcb *stcb;
1455
1456 *netp = NULL;
1457 *inp_p = NULL;
1458 SCTP_INP_INFO_RLOCK();
1459 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1460 sctppcbinfo.hashasocmark)];
1461 if (head == NULL) {
1462 /* invalid vtag */
1463 SCTP_INP_INFO_RUNLOCK();
1464 return (NULL);
1465 }
1466 LIST_FOREACH(stcb, head, sctp_asocs) {
1467 SCTP_INP_RLOCK(stcb->sctp_ep);
1468 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1469 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1470 continue;
1471 }
1472 SCTP_TCB_LOCK(stcb);
1473 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1474 if (stcb->asoc.my_vtag == vtag) {
1475 /* candidate */
1476 if (stcb->rport != rport) {
1477 /*
1478 * we could remove this if vtags are unique
1479 * across the system.
1480 */
1481 SCTP_TCB_UNLOCK(stcb);
1482 continue;
1483 }
1484 if (stcb->sctp_ep->sctp_lport != lport) {
1485 /*
1486 * we could remove this if vtags are unique
1487 * across the system.
1488 */
1489 SCTP_TCB_UNLOCK(stcb);
1490 continue;
1491 }
1492 if (skip_src_check) {
1493 *netp = NULL; /* unknown */
1494 if (inp_p)
1495 *inp_p = stcb->sctp_ep;
1496 SCTP_INP_INFO_RUNLOCK();
1497 return (stcb);
1498 }
1499 net = sctp_findnet(stcb, from);
1500 if (net) {
1501 /* yep its him. */
1502 *netp = net;
1503 SCTP_STAT_INCR(sctps_vtagexpress);
1504 *inp_p = stcb->sctp_ep;
1505 SCTP_INP_INFO_RUNLOCK();
1506 return (stcb);
1507 } else {
1508 /*
1509 * not him, this should only happen in rare
1510 * cases so I peg it.
1511 */
1512 SCTP_STAT_INCR(sctps_vtagbogus);
1513 }
1514 }
1515 SCTP_TCB_UNLOCK(stcb);
1516 }
1517 SCTP_INP_INFO_RUNLOCK();
1518 return (NULL);
1519}
1520
1521/*
1522 * Find an association with the pointer to the inbound IP packet. This can be
1523 * a IPv4 or IPv6 packet.
1524 */
1525struct sctp_tcb *
1526sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1527 struct sctphdr *sh, struct sctp_chunkhdr *ch,
1528 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1529{
1530 int find_tcp_pool;
1531 struct ip *iph;
1532 struct sctp_tcb *retval;
1533 struct sockaddr_storage to_store, from_store;
1534 struct sockaddr *to = (struct sockaddr *)&to_store;
1535 struct sockaddr *from = (struct sockaddr *)&from_store;
1536 struct sctp_inpcb *inp;
1537
1538 iph = mtod(m, struct ip *);
1539 if (iph->ip_v == IPVERSION) {
1540 /* its IPv4 */
1541 struct sockaddr_in *from4;
1542
1543 from4 = (struct sockaddr_in *)&from_store;
1544 bzero(from4, sizeof(*from4));
1545 from4->sin_family = AF_INET;
1546 from4->sin_len = sizeof(struct sockaddr_in);
1547 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1548 from4->sin_port = sh->src_port;
1549 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1550 /* its IPv6 */
1551 struct ip6_hdr *ip6;
1552 struct sockaddr_in6 *from6;
1553
1554 ip6 = mtod(m, struct ip6_hdr *);
1555 from6 = (struct sockaddr_in6 *)&from_store;
1556 bzero(from6, sizeof(*from6));
1557 from6->sin6_family = AF_INET6;
1558 from6->sin6_len = sizeof(struct sockaddr_in6);
1559 from6->sin6_addr = ip6->ip6_src;
1560 from6->sin6_port = sh->src_port;
1561 /* Get the scopes in properly to the sin6 addr's */
1562 /* we probably don't need these operations */
1563 (void)sa6_recoverscope(from6);
1564 sa6_embedscope(from6, ip6_use_defzone);
1565 } else {
1566 /* Currently not supported. */
1567 return (NULL);
1568 }
1569 if (sh->v_tag) {
1570 /* we only go down this path if vtag is non-zero */
1571 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1572 inp_p, netp, sh->src_port, sh->dest_port, 0);
1573 if (retval) {
1574 return (retval);
1575 }
1576 }
1577 if (iph->ip_v == IPVERSION) {
1578 /* its IPv4 */
1579 struct sockaddr_in *to4;
1580
1581 to4 = (struct sockaddr_in *)&to_store;
1582 bzero(to4, sizeof(*to4));
1583 to4->sin_family = AF_INET;
1584 to4->sin_len = sizeof(struct sockaddr_in);
1585 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1586 to4->sin_port = sh->dest_port;
1587 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1588 /* its IPv6 */
1589 struct ip6_hdr *ip6;
1590 struct sockaddr_in6 *to6;
1591
1592 ip6 = mtod(m, struct ip6_hdr *);
1593 to6 = (struct sockaddr_in6 *)&to_store;
1594 bzero(to6, sizeof(*to6));
1595 to6->sin6_family = AF_INET6;
1596 to6->sin6_len = sizeof(struct sockaddr_in6);
1597 to6->sin6_addr = ip6->ip6_dst;
1598 to6->sin6_port = sh->dest_port;
1599 /* Get the scopes in properly to the sin6 addr's */
1600 /* we probably don't need these operations */
1601 (void)sa6_recoverscope(to6);
1602 sa6_embedscope(to6, ip6_use_defzone);
1603 }
1604 find_tcp_pool = 0;
1605 if ((ch->chunk_type != SCTP_INITIATION) &&
1606 (ch->chunk_type != SCTP_INITIATION_ACK) &&
1607 (ch->chunk_type != SCTP_COOKIE_ACK) &&
1608 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1609 /* Other chunk types go to the tcp pool. */
1610 find_tcp_pool = 1;
1611 }
1612 if (inp_p) {
1613 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1614 find_tcp_pool, vrf_id);
1615 inp = *inp_p;
1616 } else {
1617 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1618 find_tcp_pool, vrf_id);
1619 }
1620 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
1621 if (retval == NULL && inp) {
1622 /* Found a EP but not this address */
1623 if ((ch->chunk_type == SCTP_INITIATION) ||
1624 (ch->chunk_type == SCTP_INITIATION_ACK)) {
1625 /*-
1626 * special hook, we do NOT return linp or an
1627 * association that is linked to an existing
1628 * association that is under the TCP pool (i.e. no
1629 * listener exists). The endpoint finding routine
1630 * will always find a listner before examining the
1631 * TCP pool.
1632 */
1633 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1634 if (inp_p) {
1635 *inp_p = NULL;
1636 }
1637 return (NULL);
1638 }
1639 retval = sctp_findassociation_special_addr(m, iphlen,
1640 offset, sh, &inp, netp, to);
1641 if (inp_p != NULL) {
1642 *inp_p = inp;
1643 }
1644 }
1645 }
1646 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
1647 return (retval);
1648}
1649
1650/*
1651 * lookup an association by an ASCONF lookup address.
1652 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1653 */
1654struct sctp_tcb *
1655sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
1656 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1657{
1658 struct sctp_tcb *stcb;
1659 struct sockaddr_in *sin;
1660 struct sockaddr_in6 *sin6;
1661 struct sockaddr_storage local_store, remote_store;
1662 struct ip *iph;
1663 struct sctp_paramhdr parm_buf, *phdr;
1664 int ptype;
1665 int zero_address = 0;
1666
1667
1668 memset(&local_store, 0, sizeof(local_store));
1669 memset(&remote_store, 0, sizeof(remote_store));
1670
1671 /* First get the destination address setup too. */
1672 iph = mtod(m, struct ip *);
1673 if (iph->ip_v == IPVERSION) {
1674 /* its IPv4 */
1675 sin = (struct sockaddr_in *)&local_store;
1676 sin->sin_family = AF_INET;
1677 sin->sin_len = sizeof(*sin);
1678 sin->sin_port = sh->dest_port;
1679 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
1680 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1681 /* its IPv6 */
1682 struct ip6_hdr *ip6;
1683
1684 ip6 = mtod(m, struct ip6_hdr *);
1685 sin6 = (struct sockaddr_in6 *)&local_store;
1686 sin6->sin6_family = AF_INET6;
1687 sin6->sin6_len = sizeof(*sin6);
1688 sin6->sin6_port = sh->dest_port;
1689 sin6->sin6_addr = ip6->ip6_dst;
1690 } else {
1691 return NULL;
1692 }
1693
1694 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
1695 &parm_buf, sizeof(struct sctp_paramhdr));
1696 if (phdr == NULL) {
1697 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
1698 __FUNCTION__);
1699 return NULL;
1700 }
1701 ptype = (int)((uint32_t) ntohs(phdr->param_type));
1702 /* get the correlation address */
1703 if (ptype == SCTP_IPV6_ADDRESS) {
1704 /* ipv6 address param */
1705 struct sctp_ipv6addr_param *p6, p6_buf;
1706
1707 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
1708 return NULL;
1709 }
1710 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
1711 offset + sizeof(struct sctp_asconf_chunk),
1712 &p6_buf.ph, sizeof(*p6));
1713 if (p6 == NULL) {
1714 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
1715 __FUNCTION__);
1716 return (NULL);
1717 }
1718 sin6 = (struct sockaddr_in6 *)&remote_store;
1719 sin6->sin6_family = AF_INET6;
1720 sin6->sin6_len = sizeof(*sin6);
1721 sin6->sin6_port = sh->src_port;
1722 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
1723 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1724 zero_address = 1;
1725 } else if (ptype == SCTP_IPV4_ADDRESS) {
1726 /* ipv4 address param */
1727 struct sctp_ipv4addr_param *p4, p4_buf;
1728
1729 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
1730 return NULL;
1731 }
1732 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
1733 offset + sizeof(struct sctp_asconf_chunk),
1734 &p4_buf.ph, sizeof(*p4));
1735 if (p4 == NULL) {
1736 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
1737 __FUNCTION__);
1738 return (NULL);
1739 }
1740 sin = (struct sockaddr_in *)&remote_store;
1741 sin->sin_family = AF_INET;
1742 sin->sin_len = sizeof(*sin);
1743 sin->sin_port = sh->src_port;
1744 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
1745 if (sin->sin_addr.s_addr == INADDR_ANY)
1746 zero_address = 1;
1747 } else {
1748 /* invalid address param type */
1749 return NULL;
1750 }
1751
1752 if (zero_address) {
1753 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
1754 netp, sh->src_port, sh->dest_port, 1);
1755 /*
1756 * printf("findassociation_ep_asconf: zero lookup address
1757 * finds stcb 0x%x\n", (uint32_t)stcb);
1758 */
1759 } else {
1760 stcb = sctp_findassociation_ep_addr(inp_p,
1761 (struct sockaddr *)&remote_store, netp,
1762 (struct sockaddr *)&local_store, NULL);
1763 }
1764 return (stcb);
1765}
1766
1767
1768/*
1769 * allocate a sctp_inpcb and setup a temporary binding to a port/all
1770 * addresses. This way if we don't get a bind we by default pick a ephemeral
1771 * port with all addresses bound.
1772 */
1773int
1774sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
1775{
1776 /*
1777 * we get called when a new endpoint starts up. We need to allocate
1778 * the sctp_inpcb structure from the zone and init it. Mark it as
1779 * unbound and find a port that we can use as an ephemeral with
1780 * INADDR_ANY. If the user binds later no problem we can then add in
1781 * the specific addresses. And setup the default parameters for the
1782 * EP.
1783 */
1784 int i, error;
1785 struct sctp_inpcb *inp;
1786 struct sctp_pcb *m;
1787 struct timeval time;
1788 sctp_sharedkey_t *null_key;
1789
1790 error = 0;
1791
1792 SCTP_INP_INFO_WLOCK();
1793 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb);
1794 if (inp == NULL) {
1795 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
1796 SCTP_INP_INFO_WUNLOCK();
1797 return (ENOBUFS);
1798 }
1799 /* zap it */
1800 bzero(inp, sizeof(*inp));
1801
1802 /* bump generations */
1803 /* setup socket pointers */
1804 inp->sctp_socket = so;
1805 inp->ip_inp.inp.inp_socket = so;
1806
1807 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
1808 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1809
1810#ifdef FAST_IPSEC
1811 {
1812 struct inpcbpolicy *pcb_sp = NULL;
1813
1814 error = ipsec_init_policy(so, &pcb_sp);
1815 /* Arrange to share the policy */
1816 inp->ip_inp.inp.inp_sp = pcb_sp;
1817 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1818 }
1819 if (error != 0) {
1820 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1821 SCTP_INP_INFO_WUNLOCK();
1822 return error;
1823 }
1824#endif /* FAST_IPSEC */
1825 SCTP_INCR_EP_COUNT();
1826 inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1827 SCTP_INP_INFO_WUNLOCK();
1828
1829 so->so_pcb = (caddr_t)inp;
1830
1831 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
1832 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
1833 /* UDP style socket */
1834 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1835 SCTP_PCB_FLAGS_UNBOUND);
1836 /* Be sure it is NON-BLOCKING IO for UDP */
1837 /* SCTP_SET_SO_NBIO(so); */
1838 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
1839 /* TCP style socket */
1840 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1841 SCTP_PCB_FLAGS_UNBOUND);
1842 /* Be sure we have blocking IO by default */
1843 SCTP_CLEAR_SO_NBIO(so);
1844 } else {
1845 /*
1846 * unsupported socket type (RAW, etc)- in case we missed it
1847 * in protosw
1848 */
1849 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1850 return (EOPNOTSUPP);
1851 }
1852 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
1853
1854 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize,
1855 &inp->sctp_hashmark);
1856 if (inp->sctp_tcbhash == NULL) {
1857 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
1858 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1859 return (ENOBUFS);
1860 }
1861 inp->def_vrf_id = vrf_id;
1862
1863 SCTP_INP_INFO_WLOCK();
1864 SCTP_INP_LOCK_INIT(inp);
1865 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
1866 SCTP_INP_READ_INIT(inp);
1867 SCTP_ASOC_CREATE_LOCK_INIT(inp);
1868 /* lock the new ep */
1869 SCTP_INP_WLOCK(inp);
1870
1871 /* add it to the info area */
1872 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1873 SCTP_INP_INFO_WUNLOCK();
1874
1875 TAILQ_INIT(&inp->read_queue);
1876 LIST_INIT(&inp->sctp_addr_list);
1877
1878 LIST_INIT(&inp->sctp_asoc_list);
1879
1880#ifdef SCTP_TRACK_FREED_ASOCS
1881 /* TEMP CODE */
1882 LIST_INIT(&inp->sctp_asoc_free_list);
1883#endif
1884 /* Init the timer structure for signature change */
1885 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
1886 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1887
1888 /* now init the actual endpoint default data */
1889 m = &inp->sctp_ep;
1890
1891 /* setup the base timeout information */
1892 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1893 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1894 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1895 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
1896 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1897 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1898 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1899 /* all max/min max are in ms */
1900 m->sctp_maxrto = sctp_rto_max_default;
1901 m->sctp_minrto = sctp_rto_min_default;
1902 m->initial_rto = sctp_rto_initial_default;
1903 m->initial_init_rto_max = sctp_init_rto_max_default;
1904 m->sctp_sack_freq = sctp_sack_freq_default;
1905
1906 m->max_open_streams_intome = MAX_SCTP_STREAMS;
1907
1908 m->max_init_times = sctp_init_rtx_max_default;
1909 m->max_send_times = sctp_assoc_rtx_max_default;
1910 m->def_net_failure = sctp_path_rtx_max_default;
1911 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1912 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1913 m->max_burst = sctp_max_burst_default;
1914 /* number of streams to pre-open on a association */
1915 m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1916
1917 /* Add adaptation cookie */
1918 m->adaptation_layer_indicator = 0x504C5253;
1919
1920 /* seed random number generator */
1921 m->random_counter = 1;
1922 m->store_at = SCTP_SIGNATURE_SIZE;
1923 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
1924 sctp_fill_random_store(m);
1925
1926 /* Minimum cookie size */
1927 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1928 sizeof(struct sctp_state_cookie);
1929 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1930
1931 /* Setup the initial secret */
1932 (void)SCTP_GETTIME_TIMEVAL(&time);
1933 m->time_of_secret_change = time.tv_sec;
1934
1935 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1936 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1937 }
1938 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1939
1940 /* How long is a cookie good for ? */
1941 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
1942 /*
1943 * Initialize authentication parameters
1944 */
1945 m->local_hmacs = sctp_default_supported_hmaclist();
1946 m->local_auth_chunks = sctp_alloc_chunklist();
1947 sctp_auth_set_default_chunks(m->local_auth_chunks);
1948 LIST_INIT(&m->shared_keys);
1949 /* add default NULL key as key id 0 */
1950 null_key = sctp_alloc_sharedkey();
1951 sctp_insert_sharedkey(&m->shared_keys, null_key);
1952 SCTP_INP_WUNLOCK(inp);
1953#ifdef SCTP_LOG_CLOSING
1954 sctp_log_closing(inp, NULL, 12);
1955#endif
1956 return (error);
1957}
1958
1959
1960void
1961sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1962 struct sctp_tcb *stcb)
1963{
1964 struct sctp_nets *net;
1965 uint16_t lport, rport;
1966 struct sctppcbhead *head;
1967 struct sctp_laddr *laddr, *oladdr;
1968
1969 SCTP_TCB_UNLOCK(stcb);
1970 SCTP_INP_INFO_WLOCK();
1971 SCTP_INP_WLOCK(old_inp);
1972 SCTP_INP_WLOCK(new_inp);
1973 SCTP_TCB_LOCK(stcb);
1974
1975 new_inp->sctp_ep.time_of_secret_change =
1976 old_inp->sctp_ep.time_of_secret_change;
1977 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1978 sizeof(old_inp->sctp_ep.secret_key));
1979 new_inp->sctp_ep.current_secret_number =
1980 old_inp->sctp_ep.current_secret_number;
1981 new_inp->sctp_ep.last_secret_number =
1982 old_inp->sctp_ep.last_secret_number;
1983 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1984
1985 /* make it so new data pours into the new socket */
1986 stcb->sctp_socket = new_inp->sctp_socket;
1987 stcb->sctp_ep = new_inp;
1988
1989 /* Copy the port across */
1990 lport = new_inp->sctp_lport = old_inp->sctp_lport;
1991 rport = stcb->rport;
1992 /* Pull the tcb from the old association */
1993 LIST_REMOVE(stcb, sctp_tcbhash);
1994 LIST_REMOVE(stcb, sctp_tcblist);
1995
1996 /* Now insert the new_inp into the TCP connected hash */
1997 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1998 sctppcbinfo.hashtcpmark)];
1999
2000 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2001 /* Its safe to access */
2002 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2003
2004 /* Now move the tcb into the endpoint list */
2005 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2006 /*
2007 * Question, do we even need to worry about the ep-hash since we
2008 * only have one connection? Probably not :> so lets get rid of it
2009 * and not suck up any kernel memory in that.
2010 */
2011
2012 /* Ok. Let's restart timer. */
2013 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2014 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2015 stcb, net);
2016 }
2017
2018 SCTP_INP_INFO_WUNLOCK();
2019 if (new_inp->sctp_tcbhash != NULL) {
2020 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2021 new_inp->sctp_tcbhash = NULL;
2022 }
2023 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2024 /* Subset bound, so copy in the laddr list from the old_inp */
2025 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2026 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
2027 if (laddr == NULL) {
2028 /*
2029 * Gak, what can we do? This assoc is really
2030 * HOSED. We probably should send an abort
2031 * here.
2032 */
2033 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2034 continue;
2035 }
2036 SCTP_INCR_LADDR_COUNT();
2037 bzero(laddr, sizeof(*laddr));
2038 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2039 laddr->ifa = oladdr->ifa;
2040 atomic_add_int(&laddr->ifa->refcount, 1);
2041 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2042 sctp_nxt_addr);
2043 new_inp->laddr_count++;
2044 }
2045 }
2046 /*
2047 * Now any running timers need to be adjusted since we really don't
2048 * care if they are running or not just blast in the new_inp into
2049 * all of them.
2050 */
2051
2052 stcb->asoc.hb_timer.ep = (void *)new_inp;
2053 stcb->asoc.dack_timer.ep = (void *)new_inp;
2054 stcb->asoc.asconf_timer.ep = (void *)new_inp;
2055 stcb->asoc.strreset_timer.ep = (void *)new_inp;
2056 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2057 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2058 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2059 /* now what about the nets? */
2060 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2061 net->pmtu_timer.ep = (void *)new_inp;
2062 net->rxt_timer.ep = (void *)new_inp;
2063 net->fr_timer.ep = (void *)new_inp;
2064 }
2065 SCTP_INP_WUNLOCK(new_inp);
2066 SCTP_INP_WUNLOCK(old_inp);
2067}
2068
2069static int
2070sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2071{
2072 struct sctppcbhead *head;
2073 struct sctp_inpcb *t_inp;
2074 int fnd;
2075
2076 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2077 sctppcbinfo.hashmark)];
2078 LIST_FOREACH(t_inp, head, sctp_hash) {
2079 if (t_inp->sctp_lport != lport) {
2080 continue;
2081 }
2082 /* is it in the VRF in question */
2083 fnd = 0;
2084 if (t_inp->def_vrf_id == vrf_id)
2085 fnd = 1;
2086 if (!fnd)
2087 continue;
2088
2089 /* This one is in use. */
2090 /* check the v6/v4 binding issue */
2091 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2092 SCTP_IPV6_V6ONLY(t_inp)) {
2093 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2094 /* collision in V6 space */
2095 return (1);
2096 } else {
2097 /* inp is BOUND_V4 no conflict */
2098 continue;
2099 }
2100 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2101 /* t_inp is bound v4 and v6, conflict always */
2102 return (1);
2103 } else {
2104 /* t_inp is bound only V4 */
2105 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2106 SCTP_IPV6_V6ONLY(inp)) {
2107 /* no conflict */
2108 continue;
2109 }
2110 /* else fall through to conflict */
2111 }
2112 return (1);
2113 }
2114 return (0);
2115}
2116
2117
2118
2119int
2120sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2121 struct sctp_ifa *sctp_ifap, struct thread *p)
2122{
2123 /* bind a ep to a socket address */
2124 struct sctppcbhead *head;
2125 struct sctp_inpcb *inp, *inp_tmp;
2126 struct inpcb *ip_inp;
2127 int bindall;
2128 uint16_t lport;
2129 int error;
2130 uint32_t vrf_id;
2131
2132 lport = 0;
2133 error = 0;
2134 bindall = 1;
2135 inp = (struct sctp_inpcb *)so->so_pcb;
2136 ip_inp = (struct inpcb *)so->so_pcb;
2137#ifdef SCTP_DEBUG
2138 if (addr) {
2139 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2140 ntohs(((struct sockaddr_in *)addr)->sin_port));
2141 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2142 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2143 }
2144#endif
2145 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2146 /* already did a bind, subsequent binds NOT allowed ! */
2147 return (EINVAL);
2148 }
2149 if (addr != NULL) {
2150 if (addr->sa_family == AF_INET) {
2151 struct sockaddr_in *sin;
2152
2153 /* IPV6_V6ONLY socket? */
2154 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2155 return (EINVAL);
2156 }
2157 if (addr->sa_len != sizeof(*sin))
2158 return (EINVAL);
2159
2160 sin = (struct sockaddr_in *)addr;
2161 lport = sin->sin_port;
2162
2163 if (sin->sin_addr.s_addr != INADDR_ANY) {
2164 bindall = 0;
2165 }
2166 } else if (addr->sa_family == AF_INET6) {
2167 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2168 struct sockaddr_in6 *sin6;
2169
2170 sin6 = (struct sockaddr_in6 *)addr;
2171
2172 if (addr->sa_len != sizeof(*sin6))
2173 return (EINVAL);
2174
2175 lport = sin6->sin6_port;
2176 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2177 bindall = 0;
2178 /* KAME hack: embed scopeid */
2179 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
2180 return (EINVAL);
2181 }
2182 /* this must be cleared for ifa_ifwithaddr() */
2183 sin6->sin6_scope_id = 0;
2184 } else {
2185 return (EAFNOSUPPORT);
2186 }
2187 }
2188 /* Setup a vrf_id to be the default for the non-bind-all case. */
2189 vrf_id = inp->def_vrf_id;
2190
2191 SCTP_INP_INFO_WLOCK();
2192 SCTP_INP_WLOCK(inp);
2193 /* increase our count due to the unlock we do */
2194 SCTP_INP_INCR_REF(inp);
2195 if (lport) {
2196 /*
2197 * Did the caller specify a port? if so we must see if a ep
2198 * already has this one bound.
2199 */
2200 /* got to be root to get at low ports */
2201 if (ntohs(lport) < IPPORT_RESERVED) {
2202 if (p && (error =
2203 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2204 )) {
2205 SCTP_INP_DECR_REF(inp);
2206 SCTP_INP_WUNLOCK(inp);
2207 SCTP_INP_INFO_WUNLOCK();
2208 return (error);
2209 }
2210 }
2211 if (p == NULL) {
2212 SCTP_INP_DECR_REF(inp);
2213 SCTP_INP_WUNLOCK(inp);
2214 SCTP_INP_INFO_WUNLOCK();
2215 return (error);
2216 }
2217 SCTP_INP_WUNLOCK(inp);
2218 if (bindall) {
2219 vrf_id = inp->def_vrf_id;
2220 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2221 if (inp_tmp != NULL) {
2222 /*
2223 * lock guy returned and lower count note
2224 * that we are not bound so inp_tmp should
2225 * NEVER be inp. And it is this inp
2226 * (inp_tmp) that gets the reference bump,
2227 * so we must lower it.
2228 */
2229 SCTP_INP_DECR_REF(inp_tmp);
2230 SCTP_INP_DECR_REF(inp);
2231 /* unlock info */
2232 SCTP_INP_INFO_WUNLOCK();
2233 return (EADDRINUSE);
2234 }
2235 } else {
2236 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2237 if (inp_tmp != NULL) {
2238 /*
2239 * lock guy returned and lower count note
2240 * that we are not bound so inp_tmp should
2241 * NEVER be inp. And it is this inp
2242 * (inp_tmp) that gets the reference bump,
2243 * so we must lower it.
2244 */
2245 SCTP_INP_DECR_REF(inp_tmp);
2246 SCTP_INP_DECR_REF(inp);
2247 /* unlock info */
2248 SCTP_INP_INFO_WUNLOCK();
2249 return (EADDRINUSE);
2250 }
2251 }
2252 SCTP_INP_WLOCK(inp);
2253 if (bindall) {
2254 /* verify that no lport is not used by a singleton */
2255 if (sctp_isport_inuse(inp, lport, vrf_id)) {
2256 /* Sorry someone already has this one bound */
2257 SCTP_INP_DECR_REF(inp);
2258 SCTP_INP_WUNLOCK(inp);
2259 SCTP_INP_INFO_WUNLOCK();
2260 return (EADDRINUSE);
2261 }
2262 }
2263 } else {
2264 uint16_t first, last, candidate;
2265 uint16_t count;
2266 int done;
2267
2268 if (ip_inp->inp_flags & INP_HIGHPORT) {
2269 first = ipport_hifirstauto;
2270 last = ipport_hilastauto;
2271 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2272 if (p && (error =
2273 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2274 )) {
2275 SCTP_INP_DECR_REF(inp);
2276 SCTP_INP_WUNLOCK(inp);
2277 SCTP_INP_INFO_WUNLOCK();
2278 return (error);
2279 }
2280 first = ipport_lowfirstauto;
2281 last = ipport_lowlastauto;
2282 } else {
2283 first = ipport_firstauto;
2284 last = ipport_lastauto;
2285 }
2286 if (first > last) {
2287 uint16_t temp;
2288
2289 temp = first;
2290 first = last;
2291 last = temp;
2292 }
2293 count = last - first + 1; /* number of candidates */
2294 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2295
2296 done = 0;
2297 while (!done) {
2298 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2299 done = 1;
2300 }
2301 if (!done) {
2302 if (--count == 0) {
2303 SCTP_INP_DECR_REF(inp);
2304 SCTP_INP_WUNLOCK(inp);
2305 SCTP_INP_INFO_WUNLOCK();
2306 return (EADDRINUSE);
2307 }
2308 if (candidate == last)
2309 candidate = first;
2310 else
2311 candidate = candidate + 1;
2312 }
2313 }
2314 lport = htons(candidate);
2315 }
2316 SCTP_INP_DECR_REF(inp);
2317 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2318 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2319 /*
2320 * this really should not happen. The guy did a non-blocking
2321 * bind and then did a close at the same time.
2322 */
2323 SCTP_INP_WUNLOCK(inp);
2324 SCTP_INP_INFO_WUNLOCK();
2325 return (EINVAL);
2326 }
2327 /* ok we look clear to give out this port, so lets setup the binding */
2328 if (bindall) {
2329 /* binding to all addresses, so just set in the proper flags */
2330 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2331 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2332 /* set the automatic addr changes from kernel flag */
2333 if (sctp_auto_asconf == 0) {
2334 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2335 } else {
2336 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2337 }
2338 } else {
2339 /*
2340 * bind specific, make sure flags is off and add a new
2341 * address structure to the sctp_addr_list inside the ep
2342 * structure.
2343 *
2344 * We will need to allocate one and insert it at the head. The
2345 * socketopt call can just insert new addresses in there as
2346 * well. It will also have to do the embed scope kame hack
2347 * too (before adding).
2348 */
2349 struct sctp_ifa *ifa;
2350 struct sockaddr_storage store_sa;
2351
2352 memset(&store_sa, 0, sizeof(store_sa));
2353 if (addr->sa_family == AF_INET) {
2354 struct sockaddr_in *sin;
2355
2356 sin = (struct sockaddr_in *)&store_sa;
2357 memcpy(sin, addr, sizeof(struct sockaddr_in));
2358 sin->sin_port = 0;
2359 } else if (addr->sa_family == AF_INET6) {
2360 struct sockaddr_in6 *sin6;
2361
2362 sin6 = (struct sockaddr_in6 *)&store_sa;
2363 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2364 sin6->sin6_port = 0;
2365 }
2366 /*
2367 * first find the interface with the bound address need to
2368 * zero out the port to find the address! yuck! can't do
2369 * this earlier since need port for sctp_pcb_findep()
2370 */
2371 if (sctp_ifap)
2372 ifa = sctp_ifap;
2373 else
2374 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2375 vrf_id, 0);
2376 if (ifa == NULL) {
2377 /* Can't find an interface with that address */
2378 SCTP_INP_WUNLOCK(inp);
2379 SCTP_INP_INFO_WUNLOCK();
2380 return (EADDRNOTAVAIL);
2381 }
2382 if (addr->sa_family == AF_INET6) {
2383 /* GAK, more FIXME IFA lock? */
2384 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2385 /* Can't bind a non-existent addr. */
2386 SCTP_INP_WUNLOCK(inp);
2387 SCTP_INP_INFO_WUNLOCK();
2388 return (EINVAL);
2389 }
2390 }
2391 /* we're not bound all */
2392 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2393 /* allow bindx() to send ASCONF's for binding changes */
2394 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2395 /* clear automatic addr changes from kernel flag */
2396 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2397
2398 /* add this address to the endpoint list */
2399 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2400 if (error != 0) {
2401 SCTP_INP_WUNLOCK(inp);
2402 SCTP_INP_INFO_WUNLOCK();
2403 return (error);
2404 }
2405 inp->laddr_count++;
2406 }
2407 /* find the bucket */
2408 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2409 sctppcbinfo.hashmark)];
2410 /* put it in the bucket */
2411 LIST_INSERT_HEAD(head, inp, sctp_hash);
2412 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2413 head, ntohs(lport));
2414 /* set in the port */
2415 inp->sctp_lport = lport;
2416
2417 /* turn off just the unbound flag */
2418 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2419 SCTP_INP_WUNLOCK(inp);
2420 SCTP_INP_INFO_WUNLOCK();
2421 return (0);
2422}
2423
2424
2425static void
2426sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2427{
2428 struct sctp_iterator *it;
2429
2430 /*
2431 * We enter with the only the ITERATOR_LOCK in place and a write
2432 * lock on the inp_info stuff.
2433 */
2434
2435 /*
2436 * Go through all iterators, we must do this since it is possible
2437 * that some iterator does NOT have the lock, but is waiting for it.
2438 * And the one that had the lock has either moved in the last
2439 * iteration or we just cleared it above. We need to find all of
2440 * those guys. The list of iterators should never be very big
2441 * though.
2442 */
2443 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2444 if (it == inp->inp_starting_point_for_iterator)
2445 /* skip this guy, he's special */
2446 continue;
2447 if (it->inp == inp) {
2448 /*
2449 * This is tricky and we DON'T lock the iterator.
2450 * Reason is he's running but waiting for me since
2451 * inp->inp_starting_point_for_iterator has the lock
2452 * on me (the guy above we skipped). This tells us
2453 * its is not running but waiting for
2454 * inp->inp_starting_point_for_iterator to be
2455 * released by the guy that does have our INP in a
2456 * lock.
2457 */
2458 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2459 it->inp = NULL;
2460 it->stcb = NULL;
2461 } else {
2462 /* set him up to do the next guy not me */
2463 it->inp = inp_next;
2464 it->stcb = NULL;
2465 }
2466 }
2467 }
2468 it = inp->inp_starting_point_for_iterator;
2469 if (it) {
2470 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2471 it->inp = NULL;
2472 } else {
2473 it->inp = inp_next;
2474 }
2475 it->stcb = NULL;
2476 }
2477}
2478
2479/* release sctp_inpcb unbind the port */
2480void
2481sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2482{
2483 /*
2484 * Here we free a endpoint. We must find it (if it is in the Hash
2485 * table) and remove it from there. Then we must also find it in the
2486 * overall list and remove it from there. After all removals are
2487 * complete then any timer has to be stopped. Then start the actual
2488 * freeing. a) Any local lists. b) Any associations. c) The hash of
2489 * all associations. d) finally the ep itself.
2490 */
2491 struct sctp_pcb *m;
2492 struct sctp_inpcb *inp_save;
2493 struct sctp_tcb *asoc, *nasoc;
2494 struct sctp_laddr *laddr, *nladdr;
2495 struct inpcb *ip_pcb;
2496 struct socket *so;
2497
2498 struct sctp_queued_to_read *sq;
2499
2500
2501 int cnt;
2502 sctp_sharedkey_t *shared_key;
2503
2504
2505#ifdef SCTP_LOG_CLOSING
2506 sctp_log_closing(inp, NULL, 0);
2507#endif
2508
2509 SCTP_ITERATOR_LOCK();
2510 so = inp->sctp_socket;
2511 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2512 /* been here before.. eeks.. get out of here */
2513 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2514 SCTP_ITERATOR_UNLOCK();
2515#ifdef SCTP_LOG_CLOSING
2516 sctp_log_closing(inp, NULL, 1);
2517#endif
2518 return;
2519 }
2520 SCTP_ASOC_CREATE_LOCK(inp);
2521 SCTP_INP_INFO_WLOCK();
2522
2523 SCTP_INP_WLOCK(inp);
2524 /* First time through we have the socket lock, after that no more. */
2525 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2526 /*
2527 * Once we are in we can remove the flag from = 1 is only
2528 * passed from the actual closing routines that are called
2529 * via the sockets layer.
2530 */
2531 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2532 }
2533 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2534 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2535
2536 if (inp->control) {
2537 sctp_m_freem(inp->control);
2538 inp->control = NULL;
2539 }
2540 if (inp->pkt) {
2541 sctp_m_freem(inp->pkt);
2542 inp->pkt = NULL;
2543 }
2544 m = &inp->sctp_ep;
2545 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
2546 * here but I will be nice :> (i.e.
2547 * ip_pcb = ep;) */
2548 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2549 int cnt_in_sd;
2550
2551 cnt_in_sd = 0;
2552 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2553 asoc = nasoc) {
2554 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2555 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2556 /* Skip guys being freed */
2557 asoc->sctp_socket = NULL;
2558 cnt_in_sd++;
2559 continue;
2560 }
2561 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2562 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2563 /*
2564 * If we have data in queue, we don't want
2565 * to just free since the app may have done,
2566 * send()/close or connect/send/close. And
2567 * it wants the data to get across first.
2568 */
2569 if (asoc->asoc.total_output_queue_size == 0) {
2570 /*
2571 * Just abandon things in the front
2572 * states
2573 */
2574 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2);
2575 continue;
2576 }
2577 }
2578 SCTP_TCB_LOCK(asoc);
2579 /* Disconnect the socket please */
2580 asoc->sctp_socket = NULL;
2581 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2582 if ((asoc->asoc.size_on_reasm_queue > 0) ||
2583 (asoc->asoc.control_pdapi) ||
2584 (asoc->asoc.size_on_all_streams > 0) ||
2585 (so && (so->so_rcv.sb_cc > 0))
2586 ) {
2587 /* Left with Data unread */
2588 struct mbuf *op_err;
2589
2590 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2591 0, M_DONTWAIT, 1, MT_DATA);
2592 if (op_err) {
2593 /* Fill in the user initiated abort */
2594 struct sctp_paramhdr *ph;
2595 uint32_t *ippp;
2596
2597 SCTP_BUF_LEN(op_err) =
2598 sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2599 ph = mtod(op_err,
2600 struct sctp_paramhdr *);
2601 ph->param_type = htons(
2602 SCTP_CAUSE_USER_INITIATED_ABT);
2603 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2604 ippp = (uint32_t *) (ph + 1);
2605 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2606 }
2607 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2608 sctp_send_abort_tcb(asoc, op_err);
2609 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2610 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2611 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2612 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2613 }
2614 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4);
2615 continue;
2616 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2617 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2618 (asoc->asoc.stream_queue_cnt == 0)
2619 ) {
2620 if (asoc->asoc.locked_on_sending) {
2621 goto abort_anyway;
2622 }
2623 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2624 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2625 /*
2626 * there is nothing queued to send,
2627 * so I send shutdown
2628 */
2629 sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2630 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2631 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2632 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2633 }
2634 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2635 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2636 asoc->asoc.primary_destination);
2637 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2638 asoc->asoc.primary_destination);
2639 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2640 }
2641 } else {
2642 /* mark into shutdown pending */
2643 struct sctp_stream_queue_pending *sp;
2644
2645 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2646 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2647 asoc->asoc.primary_destination);
2648 if (asoc->asoc.locked_on_sending) {
2649 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2650 sctp_streamhead);
2651 if (sp == NULL) {
2652 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2653 asoc->asoc.locked_on_sending,
2654 asoc->asoc.locked_on_sending->stream_no);
2655 } else {
2656 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2657 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2658 }
2659 }
2660 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2661 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2662 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2663 struct mbuf *op_err;
2664
2665 abort_anyway:
2666 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2667 0, M_DONTWAIT, 1, MT_DATA);
2668 if (op_err) {
2669 /*
2670 * Fill in the user
2671 * initiated abort
2672 */
2673 struct sctp_paramhdr *ph;
2674 uint32_t *ippp;
2675
2676 SCTP_BUF_LEN(op_err) =
2677 (sizeof(struct sctp_paramhdr) +
2678 sizeof(uint32_t));
2679 ph = mtod(op_err,
2680 struct sctp_paramhdr *);
2681 ph->param_type = htons(
2682 SCTP_CAUSE_USER_INITIATED_ABT);
2683 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2684 ippp = (uint32_t *) (ph + 1);
2685 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
2686 }
2687 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
2688 sctp_send_abort_tcb(asoc, op_err);
2689 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2690 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2691 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2692 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2693 }
2694 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6);
2695 continue;
2696 }
2697 }
2698 cnt_in_sd++;
2699 SCTP_TCB_UNLOCK(asoc);
2700 }
2701 /* now is there some left in our SHUTDOWN state? */
2702 if (cnt_in_sd) {
2703 SCTP_INP_WUNLOCK(inp);
2704 SCTP_ASOC_CREATE_UNLOCK(inp);
2705 SCTP_INP_INFO_WUNLOCK();
2706 SCTP_ITERATOR_UNLOCK();
2707#ifdef SCTP_LOG_CLOSING
2708 sctp_log_closing(inp, NULL, 2);
2709#endif
2710 return;
2711 }
2712 }
2713 inp->sctp_socket = NULL;
2714 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2715 SCTP_PCB_FLAGS_UNBOUND) {
2716 /*
2717 * ok, this guy has been bound. It's port is somewhere in
2718 * the sctppcbinfo hash table. Remove it!
2719 */
2720 LIST_REMOVE(inp, sctp_hash);
2721 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2722 }
2723 /*
2724 * If there is a timer running to kill us, forget it, since it may
2725 * have a contest on the INP lock.. which would cause us to die ...
2726 */
2727 cnt = 0;
2728 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2729 asoc = nasoc) {
2730 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2731 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2732 cnt++;
2733 continue;
2734 }
2735 /* Free associations that are NOT killing us */
2736 SCTP_TCB_LOCK(asoc);
2737 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2738 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2739 struct mbuf *op_err;
2740 uint32_t *ippp;
2741
2742 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2743 0, M_DONTWAIT, 1, MT_DATA);
2744 if (op_err) {
2745 /* Fill in the user initiated abort */
2746 struct sctp_paramhdr *ph;
2747
2748 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
2749 sizeof(uint32_t));
2750 ph = mtod(op_err, struct sctp_paramhdr *);
2751 ph->param_type = htons(
2752 SCTP_CAUSE_USER_INITIATED_ABT);
2753 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2754 ippp = (uint32_t *) (ph + 1);
2755 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
2756
2757 }
2758 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
2759 sctp_send_abort_tcb(asoc, op_err);
2760 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2761 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2762 cnt++;
2763 SCTP_TCB_UNLOCK(asoc);
2764 continue;
2765 }
2766 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2767 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2768 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2769 }
2770 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8);
2771 }
2772 if (cnt) {
2773 /* Ok we have someone out there that will kill us */
2774 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2775 SCTP_INP_WUNLOCK(inp);
2776 SCTP_ASOC_CREATE_UNLOCK(inp);
2777 SCTP_INP_INFO_WUNLOCK();
2778 SCTP_ITERATOR_UNLOCK();
2779#ifdef SCTP_LOG_CLOSING
2780 sctp_log_closing(inp, NULL, 3);
2781#endif
2782 return;
2783 }
2784 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2785 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2786 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2787 SCTP_INP_WUNLOCK(inp);
2788 SCTP_ASOC_CREATE_UNLOCK(inp);
2789 SCTP_INP_INFO_WUNLOCK();
2790 SCTP_ITERATOR_UNLOCK();
2791#ifdef SCTP_LOG_CLOSING
2792 sctp_log_closing(inp, NULL, 4);
2793#endif
2794 return;
2795 }
2796 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2797 inp->sctp_ep.signature_change.type = 0;
2798 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2799
2800#ifdef SCTP_LOG_CLOSING
2801 sctp_log_closing(inp, NULL, 5);
2802#endif
2803
2804 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2805 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2806 /* Clear the read queue */
2807 /* sa_ignore FREED_MEMORY */
2808 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2809 /* Its only abandoned if it had data left */
2810 if (sq->length)
2811 SCTP_STAT_INCR(sctps_left_abandon);
2812
2813 TAILQ_REMOVE(&inp->read_queue, sq, next);
2814 sctp_free_remote_addr(sq->whoFrom);
2815 if (so)
2816 so->so_rcv.sb_cc -= sq->length;
2817 if (sq->data) {
2818 sctp_m_freem(sq->data);
2819 sq->data = NULL;
2820 }
2821 /*
2822 * no need to free the net count, since at this point all
2823 * assoc's are gone.
2824 */
2825 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2826 SCTP_DECR_READQ_COUNT();
2827 }
2828 /* Now the sctp_pcb things */
2829 /*
2830 * free each asoc if it is not already closed/free. we can't use the
2831 * macro here since le_next will get freed as part of the
2832 * sctp_free_assoc() call.
2833 */
2834 cnt = 0;
2835 if (so) {
2836#ifdef FAST_IPSEC
2837 ipsec4_delete_pcbpolicy(ip_pcb);
2838#endif /* FAST_IPSEC */
2839
2840 /* Unlocks not needed since the socket is gone now */
2841 }
2842 if (ip_pcb->inp_options) {
2843 (void)sctp_m_free(ip_pcb->inp_options);
2844 ip_pcb->inp_options = 0;
2845 }
2846 if (ip_pcb->inp_moptions) {
2847 inp_freemoptions(ip_pcb->inp_moptions);
2848 ip_pcb->inp_moptions = 0;
2849 }
2850#ifdef INET6
2851 if (ip_pcb->inp_vflag & INP_IPV6) {
2852 struct in6pcb *in6p;
2853
2854 in6p = (struct in6pcb *)inp;
2855 ip6_freepcbopts(in6p->in6p_outputopts);
2856 }
2857#endif /* INET6 */
2858 ip_pcb->inp_vflag = 0;
2859 /* free up authentication fields */
2860 if (inp->sctp_ep.local_auth_chunks != NULL)
2861 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2862 if (inp->sctp_ep.local_hmacs != NULL)
2863 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2864
2865 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2866 while (shared_key) {
2867 LIST_REMOVE(shared_key, next);
2868 sctp_free_sharedkey(shared_key);
2869 /* sa_ignore FREED_MEMORY */
2870 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2871 }
2872
2873 inp_save = LIST_NEXT(inp, sctp_list);
2874 LIST_REMOVE(inp, sctp_list);
2875
2876 /* fix any iterators only after out of the list */
2877 sctp_iterator_inp_being_freed(inp, inp_save);
2878 /*
2879 * if we have an address list the following will free the list of
2880 * ifaddr's that are set into this ep. Again macro limitations here,
2881 * since the LIST_FOREACH could be a bad idea.
2882 */
2883 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2884 laddr = nladdr) {
2885 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2886 sctp_remove_laddr(laddr);
2887 }
2888
2889#ifdef SCTP_TRACK_FREED_ASOCS
2890 /* TEMP CODE */
2891 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2892 asoc = nasoc) {
2893 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2894 LIST_REMOVE(asoc, sctp_tcblist);
2895 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2896 SCTP_DECR_ASOC_COUNT();
2897 }
2898 /* *** END TEMP CODE *** */
2899#endif
2900 /* Now lets see about freeing the EP hash table. */
2901 if (inp->sctp_tcbhash != NULL) {
2902 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2903 inp->sctp_tcbhash = NULL;
2904 }
2905 /* Now we must put the ep memory back into the zone pool */
2906 INP_LOCK_DESTROY(&inp->ip_inp.inp);
2907 SCTP_INP_LOCK_DESTROY(inp);
2908 SCTP_INP_READ_DESTROY(inp);
2909 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2910 SCTP_INP_INFO_WUNLOCK();
2911
2912 SCTP_ITERATOR_UNLOCK();
2913
2914 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2915 SCTP_DECR_EP_COUNT();
2916
2917}
2918
2919
2920struct sctp_nets *
2921sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2922{
2923 struct sctp_nets *net;
2924
2925 /* locate the address */
2926 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2927 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2928 return (net);
2929 }
2930 return (NULL);
2931}
2932
2933
2934int
2935sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2936{
2937 struct sctp_ifa *sctp_ifa;
2938
2939 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2940 if (sctp_ifa) {
2941 return (1);
2942 } else {
2943 return (0);
2944 }
2945}
2946
2947void
2948sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net)
2949{
2950 net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND));
2951 /* we always get at LEAST 2 MTU's */
2952 if (net->cwnd < (2 * net->mtu)) {
2953 net->cwnd = 2 * net->mtu;
2954 }
2955 net->ssthresh = stcb->asoc.peers_rwnd;
2956}
2957
2958
2959
2960/*
2961 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2962 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2963 * stats of stuff.
2964 */
2965int
2966sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2967 int set_scope, int from)
2968{
2969 /*
2970 * The following is redundant to the same lines in the
2971 * sctp_aloc_assoc() but is needed since other's call the add
2972 * address function
2973 */
2974 struct sctp_nets *net, *netfirst;
2975 int addr_inscope;
2976
2977 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
2978 from);
2979 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
2980
2981 netfirst = sctp_findnet(stcb, newaddr);
2982 if (netfirst) {
2983 /*
2984 * Lie and return ok, we don't want to make the association
2985 * go away for this behavior. It will happen in the TCP
2986 * model in a connected socket. It does not reach the hash
2987 * table until after the association is built so it can't be
2988 * found. Mark as reachable, since the initial creation will
2989 * have been cleared and the NOT_IN_ASSOC flag will have
2990 * been added... and we don't want to end up removing it
2991 * back out.
2992 */
2993 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2994 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
2995 SCTP_ADDR_UNCONFIRMED);
2996 } else {
2997 netfirst->dest_state = SCTP_ADDR_REACHABLE;
2998 }
2999
3000 return (0);
3001 }
3002 addr_inscope = 1;
3003 if (newaddr->sa_family == AF_INET) {
3004 struct sockaddr_in *sin;
3005
3006 sin = (struct sockaddr_in *)newaddr;
3007 if (sin->sin_addr.s_addr == 0) {
3008 /* Invalid address */
3009 return (-1);
3010 }
3011 /* zero out the bzero area */
3012 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3013
3014 /* assure len is set */
3015 sin->sin_len = sizeof(struct sockaddr_in);
3016 if (set_scope) {
3017#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3018 stcb->ipv4_local_scope = 1;
3019#else
3020 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3021 stcb->asoc.ipv4_local_scope = 1;
3022 }
3023#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3024 } else {
3025 /* Validate the address is in scope */
3026 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3027 (stcb->asoc.ipv4_local_scope == 0)) {
3028 addr_inscope = 0;
3029 }
3030 }
3031 } else if (newaddr->sa_family == AF_INET6) {
3032 struct sockaddr_in6 *sin6;
3033
3034 sin6 = (struct sockaddr_in6 *)newaddr;
3035 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3036 /* Invalid address */
3037 return (-1);
3038 }
3039 /* assure len is set */
3040 sin6->sin6_len = sizeof(struct sockaddr_in6);
3041 if (set_scope) {
3042 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3043 stcb->asoc.loopback_scope = 1;
3044 stcb->asoc.local_scope = 0;
3045 stcb->asoc.ipv4_local_scope = 1;
3046 stcb->asoc.site_scope = 1;
3047 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3048 /*
3049 * If the new destination is a LINK_LOCAL we
3050 * must have common site scope. Don't set
3051 * the local scope since we may not share
3052 * all links, only loopback can do this.
3053 * Links on the local network would also be
3054 * on our private network for v4 too.
3055 */
3056 stcb->asoc.ipv4_local_scope = 1;
3057 stcb->asoc.site_scope = 1;
3058 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3059 /*
3060 * If the new destination is SITE_LOCAL then
3061 * we must have site scope in common.
3062 */
3063 stcb->asoc.site_scope = 1;
3064 }
3065 } else {
3066 /* Validate the address is in scope */
3067 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3068 (stcb->asoc.loopback_scope == 0)) {
3069 addr_inscope = 0;
3070 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3071 (stcb->asoc.local_scope == 0)) {
3072 addr_inscope = 0;
3073 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3074 (stcb->asoc.site_scope == 0)) {
3075 addr_inscope = 0;
3076 }
3077 }
3078 } else {
3079 /* not supported family type */
3080 return (-1);
3081 }
3082 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3083 if (net == NULL) {
3084 return (-1);
3085 }
3086 SCTP_INCR_RADDR_COUNT();
3087 bzero(net, sizeof(*net));
3088 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3089 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3090 if (newaddr->sa_family == AF_INET) {
3091 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3092 } else if (newaddr->sa_family == AF_INET6) {
3093 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3094 }
3095 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3096 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3097 stcb->asoc.loopback_scope = 1;
3098 stcb->asoc.ipv4_local_scope = 1;
3099 stcb->asoc.local_scope = 0;
3100 stcb->asoc.site_scope = 1;
3101 addr_inscope = 1;
3102 }
3103 net->failure_threshold = stcb->asoc.def_net_failure;
3104 if (addr_inscope == 0) {
3105 net->dest_state = (SCTP_ADDR_REACHABLE |
3106 SCTP_ADDR_OUT_OF_SCOPE);
3107 } else {
3108 if (from == SCTP_ADDR_IS_CONFIRMED)
3109 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3110 net->dest_state = SCTP_ADDR_REACHABLE;
3111 else
3112 net->dest_state = SCTP_ADDR_REACHABLE |
3113 SCTP_ADDR_UNCONFIRMED;
3114 }
3115 /*
3116 * We set this to 0, the timer code knows that this means its an
3117 * initial value
3118 */
3119 net->RTO = 0;
3120 net->RTO_measured = 0;
3121 stcb->asoc.numnets++;
3122 *(&net->ref_count) = 1;
3123 net->tos_flowlabel = 0;
3124#ifdef INET
3125 if (newaddr->sa_family == AF_INET)
3126 net->tos_flowlabel = stcb->asoc.default_tos;
3127#endif
3128#ifdef INET6
3129 if (newaddr->sa_family == AF_INET6)
3130 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3131#endif
3132 /* Init the timer structure */
3133 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3134 SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3135 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3136
3137 /* Now generate a route for this guy */
3138 /* KAME hack: embed scopeid */
3139 if (newaddr->sa_family == AF_INET6) {
3140 struct sockaddr_in6 *sin6;
3141
3142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3143 (void)sa6_embedscope(sin6, ip6_use_defzone);
3144 sin6->sin6_scope_id = 0;
3145 }
3146 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3147
3148 if (newaddr->sa_family == AF_INET6) {
3149 struct sockaddr_in6 *sin6;
3150
3151 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3152 (void)sa6_recoverscope(sin6);
3153 }
3154 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3155 /* Get source address */
3156 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3157 stcb,
3158 (sctp_route_t *) & net->ro,
3159 net,
3160 0,
3161 stcb->asoc.vrf_id);
3162 /* Now get the interface MTU */
3163 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3164 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3165 } else {
3166 net->mtu = 0;
3167 }
3168#ifdef SCTP_PRINT_FOR_B_AND_M
3169 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3170#endif
3171 if (net->mtu == 0) {
3172 /* Huh ?? */
3173 net->mtu = SCTP_DEFAULT_MTU;
3174 } else {
3175 uint32_t rmtu;
3176
3177 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3178#ifdef SCTP_PRINT_FOR_B_AND_M
3179 SCTP_PRINTF("The route mtu is %d\n", rmtu);
3180#endif
3181 if (rmtu == 0) {
3182 /*
3183 * Start things off to match mtu of
3184 * interface please.
3185 */
3186 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3187 net->ro.ro_rt, net->mtu);
3188 } else {
3189 /*
3190 * we take the route mtu over the interface,
3191 * since the route may be leading out the
3192 * loopback, or a different interface.
3193 */
3194 net->mtu = rmtu;
3195 }
3196 }
3197 if (from == SCTP_ALLOC_ASOC) {
3198#ifdef SCTP_PRINT_FOR_B_AND_M
3199 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3200#endif
3201 stcb->asoc.smallest_mtu = net->mtu;
3202 }
3203 } else {
3204 net->mtu = stcb->asoc.smallest_mtu;
3205 }
3206 if (stcb->asoc.smallest_mtu > net->mtu) {
3207#ifdef SCTP_PRINT_FOR_B_AND_M
3208 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3209 net->mtu, stcb->asoc.smallest_mtu);
3210#endif
3211 stcb->asoc.smallest_mtu = net->mtu;
3212 }
3213 /*
3214 * We take the max of the burst limit times a MTU or the
3215 * INITIAL_CWND. We then limit this to 4 MTU's of sending.
3216 */
3217 sctp_set_initial_cc_param(stcb, net);
3218
3219
3220 if (sctp_logging_level & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
3221 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION);
3222 }
3223 /*
3224 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3225 * of assoc (2005/06/27, iyengar@cis.udel.edu)
3226 */
3227 net->find_pseudo_cumack = 1;
3228 net->find_rtx_pseudo_cumack = 1;
3229 net->src_addr_selected = 0;
3230 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3231 if (net->ro.ro_rt == NULL) {
3232 /* Since we have no route put it at the back */
3233 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3234 } else if (netfirst == NULL) {
3235 /* We are the first one in the pool. */
3236 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3237 } else if (netfirst->ro.ro_rt == NULL) {
3238 /*
3239 * First one has NO route. Place this one ahead of the first
3240 * one.
3241 */
3242 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3243 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3244 /*
3245 * This one has a different interface than the one at the
3246 * top of the list. Place it ahead.
3247 */
3248 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3249 } else {
3250 /*
3251 * Ok we have the same interface as the first one. Move
3252 * forward until we find either a) one with a NULL route...
3253 * insert ahead of that b) one with a different ifp.. insert
3254 * after that. c) end of the list.. insert at the tail.
3255 */
3256 struct sctp_nets *netlook;
3257
3258 do {
3259 netlook = TAILQ_NEXT(netfirst, sctp_next);
3260 if (netlook == NULL) {
3261 /* End of the list */
3262 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3263 break;
3264 } else if (netlook->ro.ro_rt == NULL) {
3265 /* next one has NO route */
3266 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3267 break;
3268 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3269 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3270 net, sctp_next);
3271 break;
3272 }
3273 /* Shift forward */
3274 netfirst = netlook;
3275 } while (netlook != NULL);
3276 }
3277
3278 /* got to have a primary set */
3279 if (stcb->asoc.primary_destination == 0) {
3280 stcb->asoc.primary_destination = net;
3281 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3282 (net->ro.ro_rt) &&
3283 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3284 /* No route to current primary adopt new primary */
3285 stcb->asoc.primary_destination = net;
3286 }
3287 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3288 net);
3289 /* Validate primary is first */
3290 net = TAILQ_FIRST(&stcb->asoc.nets);
3291 if ((net != stcb->asoc.primary_destination) &&
3292 (stcb->asoc.primary_destination)) {
3293 /*
3294 * first one on the list is NOT the primary sctp_cmpaddr()
3295 * is much more efficent if the primary is the first on the
3296 * list, make it so.
3297 */
3298 TAILQ_REMOVE(&stcb->asoc.nets,
3299 stcb->asoc.primary_destination, sctp_next);
3300 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3301 stcb->asoc.primary_destination, sctp_next);
3302 }
3303 return (0);
3304}
3305
3306
3307/*
3308 * allocate an association and add it to the endpoint. The caller must be
3309 * careful to add all additional addresses once they are know right away or
3310 * else the assoc will be may experience a blackout scenario.
3311 */
3312struct sctp_tcb *
3313sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3314 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id)
3315{
3316 struct sctp_tcb *stcb;
3317 struct sctp_association *asoc;
3318 struct sctpasochead *head;
3319 uint16_t rport;
3320 int err;
3321
3322 /*
3323 * Assumption made here: Caller has done a
3324 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3325 * address does not exist already.
3326 */
3327 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3328 /* Hit max assoc, sorry no more */
3329 *error = ENOBUFS;
3330 return (NULL);
3331 }
3332 if (firstaddr == NULL) {
3333 *error = EINVAL;
3334 return (NULL);
3335 }
3336 SCTP_INP_RLOCK(inp);
3337 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3338 /*
3339 * If its in the TCP pool, its NOT allowed to create an
3340 * association. The parent listener needs to call
3341 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3342 * off, or connected one does this.. its an error.
3343 */
3344 SCTP_INP_RUNLOCK(inp);
3345 *error = EINVAL;
3346 return (NULL);
3347 }
3348 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3349#ifdef SCTP_DEBUG
3350 if (firstaddr) {
3351 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3352 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3353 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3354 } else {
3355 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3356 }
3357#endif /* SCTP_DEBUG */
3358 if (firstaddr->sa_family == AF_INET) {
3359 struct sockaddr_in *sin;
3360
3361 sin = (struct sockaddr_in *)firstaddr;
3362 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3363 /* Invalid address */
3364 SCTP_INP_RUNLOCK(inp);
3365 *error = EINVAL;
3366 return (NULL);
3367 }
3368 rport = sin->sin_port;
3369 } else if (firstaddr->sa_family == AF_INET6) {
3370 struct sockaddr_in6 *sin6;
3371
3372 sin6 = (struct sockaddr_in6 *)firstaddr;
3373 if ((sin6->sin6_port == 0) ||
3374 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3375 /* Invalid address */
3376 SCTP_INP_RUNLOCK(inp);
3377 *error = EINVAL;
3378 return (NULL);
3379 }
3380 rport = sin6->sin6_port;
3381 } else {
3382 /* not supported family type */
3383 SCTP_INP_RUNLOCK(inp);
3384 *error = EINVAL;
3385 return (NULL);
3386 }
3387 SCTP_INP_RUNLOCK(inp);
3388 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3389 /*
3390 * If you have not performed a bind, then we need to do the
3391 * ephemerial bind for you.
3392 */
3393 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3394 (struct sockaddr *)NULL, (struct sctp_ifa *)NULL,
3395 (struct thread *)NULL
3396 ))) {
3397 /* bind error, probably perm */
3398 *error = err;
3399 return (NULL);
3400 }
3401 }
3402 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3403 if (stcb == NULL) {
3404 /* out of memory? */
3405 *error = ENOMEM;
3406 return (NULL);
3407 }
3408 SCTP_INCR_ASOC_COUNT();
3409
3410 bzero(stcb, sizeof(*stcb));
3411 asoc = &stcb->asoc;
3412 SCTP_TCB_LOCK_INIT(stcb);
3413 SCTP_TCB_SEND_LOCK_INIT(stcb);
3414 /* setup back pointer's */
3415 stcb->sctp_ep = inp;
3416 stcb->sctp_socket = inp->sctp_socket;
3417 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3418 /* failed */
3419 SCTP_TCB_LOCK_DESTROY(stcb);
3420 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3421 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3422 SCTP_DECR_ASOC_COUNT();
3423 *error = err;
3424 return (NULL);
3425 }
3426 /* and the port */
3427 stcb->rport = rport;
3428 SCTP_INP_INFO_WLOCK();
3429 SCTP_INP_WLOCK(inp);
3430 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3431 /* inpcb freed while alloc going on */
3432 SCTP_TCB_LOCK_DESTROY(stcb);
3433 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3434 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3435 SCTP_INP_WUNLOCK(inp);
3436 SCTP_INP_INFO_WUNLOCK();
3437 SCTP_DECR_ASOC_COUNT();
3438 *error = EINVAL;
3439 return (NULL);
3440 }
3441 SCTP_TCB_LOCK(stcb);
3442
3443 /* now that my_vtag is set, add it to the hash */
3444 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3445 sctppcbinfo.hashasocmark)];
3446 /* put it in the bucket in the vtag hash of assoc's for the system */
3447 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3448 SCTP_INP_INFO_WUNLOCK();
3449
3450 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3451 /* failure.. memory error? */
3452 if (asoc->strmout) {
3453 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3454 asoc->strmout = NULL;
3455 }
3456 if (asoc->mapping_array) {
3457 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3458 asoc->mapping_array = NULL;
3459 }
3460 SCTP_DECR_ASOC_COUNT();
3461 SCTP_TCB_LOCK_DESTROY(stcb);
3462 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3463 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3464 SCTP_INP_WUNLOCK(inp);
3465 *error = ENOBUFS;
3466 return (NULL);
3467 }
3468 /* Init all the timers */
3469 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3470 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3471 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3472 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3473 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3474 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3475 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3476
3477 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3478 /* now file the port under the hash as well */
3479 if (inp->sctp_tcbhash != NULL) {
3480 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3481 inp->sctp_hashmark)];
3482 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3483 }
3484 SCTP_INP_WUNLOCK(inp);
3485 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3486 return (stcb);
3487}
3488
3489
3490void
3491sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3492{
3493 struct sctp_association *asoc;
3494
3495 asoc = &stcb->asoc;
3496 asoc->numnets--;
3497 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3498 if (net == asoc->primary_destination) {
3499 /* Reset primary */
3500 struct sctp_nets *lnet;
3501
3502 lnet = TAILQ_FIRST(&asoc->nets);
3503 /* Try to find a confirmed primary */
3504 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3505 }
3506 if (net == asoc->last_data_chunk_from) {
3507 /* Reset primary */
3508 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3509 }
3510 if (net == asoc->last_control_chunk_from) {
3511 /* Clear net */
3512 asoc->last_control_chunk_from = NULL;
3513 }
3514 sctp_free_remote_addr(net);
3515}
3516
3517/*
3518 * remove a remote endpoint address from an association, it will fail if the
3519 * address does not exist.
3520 */
3521int
3522sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3523{
3524 /*
3525 * Here we need to remove a remote address. This is quite simple, we
3526 * first find it in the list of address for the association
3527 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3528 * on that item. Note we do not allow it to be removed if there are
3529 * no other addresses.
3530 */
3531 struct sctp_association *asoc;
3532 struct sctp_nets *net, *net_tmp;
3533
3534 asoc = &stcb->asoc;
3535
3536 /* locate the address */
3537 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3538 net_tmp = TAILQ_NEXT(net, sctp_next);
3539 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3540 continue;
3541 }
3542 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3543 remaddr)) {
3544 /* we found the guy */
3545 if (asoc->numnets < 2) {
3546 /* Must have at LEAST two remote addresses */
3547 return (-1);
3548 } else {
3549 sctp_remove_net(stcb, net);
3550 return (0);
3551 }
3552 }
3553 }
3554 /* not found. */
3555 return (-2);
3556}
3557
3558
3559void
3560sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3561{
3562 struct sctpvtaghead *chain;
3563 struct sctp_tagblock *twait_block;
3564 struct timeval now;
3565 int set, i;
3566
3567 (void)SCTP_GETTIME_TIMEVAL(&now);
3568 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3569 set = 0;
3570 if (!SCTP_LIST_EMPTY(chain)) {
3571 /* Block(s) present, lets find space, and expire on the fly */
3572 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3573 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3574 if ((twait_block->vtag_block[i].v_tag == 0) &&
3575 !set) {
3576 twait_block->vtag_block[i].tv_sec_at_expire =
3577 now.tv_sec + time;
3578 twait_block->vtag_block[i].v_tag = tag;
3579 set = 1;
3580 } else if ((twait_block->vtag_block[i].v_tag) &&
3581 ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3582 now.tv_sec)) {
3583 /* Audit expires this guy */
3584 twait_block->vtag_block[i].tv_sec_at_expire = 0;
3585 twait_block->vtag_block[i].v_tag = 0;
3586 if (set == 0) {
3587 /* Reuse it for my new tag */
3588 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3589 twait_block->vtag_block[0].v_tag = tag;
3590 set = 1;
3591 }
3592 }
3593 }
3594 if (set) {
3595 /*
3596 * We only do up to the block where we can
3597 * place our tag for audits
3598 */
3599 break;
3600 }
3601 }
3602 }
3603 /* Need to add a new block to chain */
3604 if (!set) {
3605 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3606 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
3607 if (twait_block == NULL) {
3608 return;
3609 }
3610 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3611 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3612 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3613 SCTP_TIME_WAIT;
3614 twait_block->vtag_block[0].v_tag = tag;
3615 }
3616}
3617
3618
3619static void
3620sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3621{
3622 struct sctp_iterator *it;
3623
3624 /*
3625 * Unlock the tcb lock we do this so we avoid a dead lock scenario
3626 * where the iterator is waiting on the TCB lock and the TCB lock is
3627 * waiting on the iterator lock.
3628 */
3629 it = stcb->asoc.stcb_starting_point_for_iterator;
3630 if (it == NULL) {
3631 return;
3632 }
3633 if (it->inp != stcb->sctp_ep) {
3634 /* hmm, focused on the wrong one? */
3635 return;
3636 }
3637 if (it->stcb != stcb) {
3638 return;
3639 }
3640 it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3641 if (it->stcb == NULL) {
3642 /* done with all asoc's in this assoc */
3643 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3644 it->inp = NULL;
3645 } else {
3646 it->inp = LIST_NEXT(inp, sctp_list);
3647 }
3648 }
3649}
3650
3651
3652/*
3653 * Free the association after un-hashing the remote port.
3654 */
3655int
3656sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3657{
3658 int i;
3659 struct sctp_association *asoc;
3660 struct sctp_nets *net, *prev;
3661 struct sctp_laddr *laddr;
3662 struct sctp_tmit_chunk *chk;
3663 struct sctp_asconf_addr *aparam;
3664 struct sctp_stream_reset_list *liste;
3665 struct sctp_queued_to_read *sq;
3666 struct sctp_stream_queue_pending *sp;
3667 sctp_sharedkey_t *shared_key;
3668 struct socket *so;
3669 int ccnt = 0;
3670 int cnt = 0;
3671
3672 /* first, lets purge the entry from the hash table. */
3673
3674#ifdef SCTP_LOG_CLOSING
3675 sctp_log_closing(inp, stcb, 6);
3676#endif
3677 if (stcb->asoc.state == 0) {
3678#ifdef SCTP_LOG_CLOSING
3679 sctp_log_closing(inp, NULL, 7);
3680#endif
3681 /* there is no asoc, really TSNH :-0 */
3682 return (1);
3683 }
3684 /* TEMP CODE */
3685 if (stcb->freed_from_where == 0) {
3686 /* Only record the first place free happened from */
3687 stcb->freed_from_where = from_location;
3688 }
3689 /* TEMP CODE */
3690
3691 asoc = &stcb->asoc;
3692 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3693 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3694 /* nothing around */
3695 so = NULL;
3696 else
3697 so = inp->sctp_socket;
3698
3699 /*
3700 * We used timer based freeing if a reader or writer is in the way.
3701 * So we first check if we are actually being called from a timer,
3702 * if so we abort early if a reader or writer is still in the way.
3703 */
3704 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3705 (from_inpcbfree == SCTP_NORMAL_PROC)) {
3706 /*
3707 * is it the timer driving us? if so are the reader/writers
3708 * gone?
3709 */
3710 if (stcb->asoc.refcnt) {
3711 /* nope, reader or writer in the way */
3712 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3713 /* no asoc destroyed */
3714 SCTP_TCB_UNLOCK(stcb);
3715#ifdef SCTP_LOG_CLOSING
3716 sctp_log_closing(inp, stcb, 8);
3717#endif
3718 return (0);
3719 }
3720 }
3721 /* now clean up any other timers */
3722 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3723 asoc->hb_timer.self = NULL;
3724 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3725 asoc->dack_timer.self = NULL;
3726 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3727 /*-
3728 * For stream reset we don't blast this unless
3729 * it is a str-reset timer, it might be the
3730 * free-asoc timer which we DON'T want to
3731 * disturb.
3732 */
3733 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
3734 asoc->strreset_timer.self = NULL;
3735 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3736 asoc->asconf_timer.self = NULL;
3737 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3738 asoc->autoclose_timer.self = NULL;
3739 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3740 asoc->shut_guard_timer.self = NULL;
3741 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3742 asoc->delayed_event_timer.self = NULL;
3743 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3744 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3745 net->fr_timer.self = NULL;
3746 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3747 net->rxt_timer.self = NULL;
3748 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3749 net->pmtu_timer.self = NULL;
3750 }
3751 /* Now the read queue needs to be cleaned up (only once) */
3752 cnt = 0;
3753 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3754 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3755 SCTP_INP_READ_LOCK(inp);
3756 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3757 if (sq->stcb == stcb) {
3758 sq->do_not_ref_stcb = 1;
3759 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3760 /*
3761 * If there is no end, there never will be
3762 * now.
3763 */
3764 if (sq->end_added == 0) {
3765 /* Held for PD-API clear that. */
3766 sq->pdapi_aborted = 1;
3767 sq->held_length = 0;
3768 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3769 /*
3770 * Need to add a PD-API
3771 * aborted indication.
3772 * Setting the control_pdapi
3773 * assures that it will be
3774 * added right after this
3775 * msg.
3776 */
3777 uint32_t strseq;
3778
3779 stcb->asoc.control_pdapi = sq;
3780 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
3781 sctp_notify_partial_delivery_indication(stcb,
3782 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
3783 stcb->asoc.control_pdapi = NULL;
3784 }
3785 }
3786 /* Add an end to wake them */
3787 sq->end_added = 1;
3788 cnt++;
3789 }
3790 }
3791 SCTP_INP_READ_UNLOCK(inp);
3792 if (stcb->block_entry) {
3793 cnt++;
3794 stcb->block_entry->error = ECONNRESET;
3795 stcb->block_entry = NULL;
3796 }
3797 }
3798 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3799 /*
3800 * reader or writer in the way, we have hopefully given him
3801 * something to chew on above.
3802 */
3803 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3804 SCTP_TCB_UNLOCK(stcb);
3805 if (so) {
3806 SCTP_INP_RLOCK(inp);
3807 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3809 /* nothing around */
3810 so = NULL;
3811 if (so) {
3812 /* Wake any reader/writers */
3813 sctp_sorwakeup(inp, so);
3814 sctp_sowwakeup(inp, so);
3815 }
3816 SCTP_INP_RUNLOCK(inp);
3817
3818 }
3819#ifdef SCTP_LOG_CLOSING
3820 sctp_log_closing(inp, stcb, 9);
3821#endif
3822 /* no asoc destroyed */
3823 return (0);
3824 }
3825#ifdef SCTP_LOG_CLOSING
3826 sctp_log_closing(inp, stcb, 10);
3827#endif
3828 /*
3829 * When I reach here, no others want to kill the assoc yet.. and I
3830 * own the lock. Now its possible an abort comes in when I do the
3831 * lock exchange below to grab all the locks to do the final take
3832 * out. to prevent this we increment the count, which will start a
3833 * timer and blow out above thus assuring us that we hold exclusive
3834 * killing of the asoc. Note that after getting back the TCB lock we
3835 * will go ahead and increment the counter back up and stop any
3836 * timer a passing stranger may have started :-S
3837 */
3838 if (from_inpcbfree == SCTP_NORMAL_PROC) {
3839 atomic_add_int(&stcb->asoc.refcnt, 1);
3840
3841 SCTP_TCB_UNLOCK(stcb);
3842
3843 SCTP_ITERATOR_LOCK();
3844 SCTP_INP_INFO_WLOCK();
3845 SCTP_INP_WLOCK(inp);
3846 SCTP_TCB_LOCK(stcb);
3847 }
3848 /* Double check the GONE flag */
3849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3850 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3851 /* nothing around */
3852 so = NULL;
3853
3854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3855 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3856 /*
3857 * For TCP type we need special handling when we are
3858 * connected. We also include the peel'ed off ones to.
3859 */
3860 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3861 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3862 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3863 if (so) {
3864 SOCK_LOCK(so);
3865 if (so->so_rcv.sb_cc == 0) {
3866 so->so_state &= ~(SS_ISCONNECTING |
3867 SS_ISDISCONNECTING |
3868 SS_ISCONFIRMING |
3869 SS_ISCONNECTED);
3870 }
3871 SOCK_UNLOCK(so);
3872 sctp_sowwakeup(inp, so);
3873 sctp_sorwakeup(inp, so);
3874 SCTP_SOWAKEUP(so);
3875 }
3876 }
3877 }
3878 /*
3879 * Make it invalid too, that way if its about to run it will abort
3880 * and return.
3881 */
3882 sctp_iterator_asoc_being_freed(inp, stcb);
3883 /* re-increment the lock */
3884 if (from_inpcbfree == SCTP_NORMAL_PROC) {
3885 atomic_add_int(&stcb->asoc.refcnt, -1);
3886 }
3887 asoc->state = 0;
3888 if (inp->sctp_tcbhash) {
3889 LIST_REMOVE(stcb, sctp_tcbhash);
3890 }
3891 if (stcb->asoc.in_restart_hash) {
3892 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3893 }
3894 /* Now lets remove it from the list of ALL associations in the EP */
3895 LIST_REMOVE(stcb, sctp_tcblist);
3896 if (from_inpcbfree == SCTP_NORMAL_PROC) {
3897 SCTP_INP_INCR_REF(inp);
3898 SCTP_INP_WUNLOCK(inp);
3899 SCTP_ITERATOR_UNLOCK();
3900 }
3901 /* pull from vtag hash */
3902 LIST_REMOVE(stcb, sctp_asocs);
3903 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3904
3905
3906 /*
3907 * Now restop the timers to be sure - this is paranoia at is finest!
3908 */
3909 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3910 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3911 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3912 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3913 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3914 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3915 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3916 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3917
3918 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3919 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3920 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3921 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3922 }
3923
3924 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3925 prev = NULL;
3926 /*
3927 * The chunk lists and such SHOULD be empty but we check them just
3928 * in case.
3929 */
3930 /* anything on the wheel needs to be removed */
3931 for (i = 0; i < asoc->streamoutcnt; i++) {
3932 struct sctp_stream_out *outs;
3933
3934 outs = &asoc->strmout[i];
3935 /* now clean up any chunks here */
3936 sp = TAILQ_FIRST(&outs->outqueue);
3937 while (sp) {
3938 TAILQ_REMOVE(&outs->outqueue, sp, next);
3939 if (sp->data) {
3940 sctp_m_freem(sp->data);
3941 sp->data = NULL;
3942 sp->tail_mbuf = NULL;
3943 }
3944 sctp_free_remote_addr(sp->net);
3945 sctp_free_spbufspace(stcb, asoc, sp);
3946 /* Free the zone stuff */
3947 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3948 SCTP_DECR_STRMOQ_COUNT();
3949 /* sa_ignore FREED_MEMORY */
3950 sp = TAILQ_FIRST(&outs->outqueue);
3951 }
3952 }
3953
3954 /* sa_ignore FREED_MEMORY */
3955 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3956 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3957 SCTP_FREE(liste, SCTP_M_STRESET);
3958 }
3959
3960 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3961 while (sq) {
3962 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3963 if (sq->data) {
3964 sctp_m_freem(sq->data);
3965 sq->data = NULL;
3966 }
3967 sctp_free_remote_addr(sq->whoFrom);
3968 sq->whoFrom = NULL;
3969 sq->stcb = NULL;
3970 /* Free the ctl entry */
3971 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3972 SCTP_DECR_READQ_COUNT();
3973 /* sa_ignore FREED_MEMORY */
3974 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3975 }
3976
3977 chk = TAILQ_FIRST(&asoc->free_chunks);
3978 while (chk) {
3979 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3980 if (chk->data) {
3981 sctp_m_freem(chk->data);
3982 chk->data = NULL;
3983 }
3984 ccnt++;
3985 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3986 SCTP_DECR_CHK_COUNT();
3987 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3988 asoc->free_chunk_cnt--;
3989 /* sa_ignore FREED_MEMORY */
3990 chk = TAILQ_FIRST(&asoc->free_chunks);
3991 }
3992 /* pending send queue SHOULD be empty */
3993 if (!TAILQ_EMPTY(&asoc->send_queue)) {
3994 chk = TAILQ_FIRST(&asoc->send_queue);
3995 while (chk) {
3996 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3997 if (chk->data) {
3998 sctp_m_freem(chk->data);
3999 chk->data = NULL;
4000 }
4001 ccnt++;
4002 sctp_free_remote_addr(chk->whoTo);
4003 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4004 SCTP_DECR_CHK_COUNT();
4005 /* sa_ignore FREED_MEMORY */
4006 chk = TAILQ_FIRST(&asoc->send_queue);
4007 }
4008 }
4009/*
4010 if(ccnt) {
4011 printf("Freed %d from send_queue\n", ccnt);
4012 ccnt = 0;
4013 }
4014*/
4015 /* sent queue SHOULD be empty */
4016 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4017 chk = TAILQ_FIRST(&asoc->sent_queue);
4018 while (chk) {
4019 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4020 if (chk->data) {
4021 sctp_m_freem(chk->data);
4022 chk->data = NULL;
4023 }
4024 ccnt++;
4025 sctp_free_remote_addr(chk->whoTo);
4026 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4027 SCTP_DECR_CHK_COUNT();
4028 /* sa_ignore FREED_MEMORY */
4029 chk = TAILQ_FIRST(&asoc->sent_queue);
4030 }
4031 }
4032/*
4033 if(ccnt) {
4034 printf("Freed %d from sent_queue\n", ccnt);
4035 ccnt = 0;
4036 }
4037*/
4038 /* control queue MAY not be empty */
4039 if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4040 chk = TAILQ_FIRST(&asoc->control_send_queue);
4041 while (chk) {
4042 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4043 if (chk->data) {
4044 sctp_m_freem(chk->data);
4045 chk->data = NULL;
4046 }
4047 ccnt++;
4048 sctp_free_remote_addr(chk->whoTo);
4049 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4050 SCTP_DECR_CHK_COUNT();
4051 /* sa_ignore FREED_MEMORY */
4052 chk = TAILQ_FIRST(&asoc->control_send_queue);
4053 }
4054 }
4055/*
4056 if(ccnt) {
4057 printf("Freed %d from ctrl_queue\n", ccnt);
4058 ccnt = 0;
4059 }
4060*/
4061 if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4062 chk = TAILQ_FIRST(&asoc->reasmqueue);
4063 while (chk) {
4064 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4065 if (chk->data) {
4066 sctp_m_freem(chk->data);
4067 chk->data = NULL;
4068 }
4069 sctp_free_remote_addr(chk->whoTo);
4070 ccnt++;
4071 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4072 SCTP_DECR_CHK_COUNT();
4073 /* sa_ignore FREED_MEMORY */
4074 chk = TAILQ_FIRST(&asoc->reasmqueue);
4075 }
4076 }
4077/*
4078 if(ccnt) {
4079 printf("Freed %d from reasm_queue\n", ccnt);
4080 ccnt = 0;
4081 }
4082*/
4083 if (asoc->mapping_array) {
4084 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4085 asoc->mapping_array = NULL;
4086 }
4087 /* the stream outs */
4088 if (asoc->strmout) {
4089 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4090 asoc->strmout = NULL;
4091 }
4092 asoc->streamoutcnt = 0;
4093 if (asoc->strmin) {
4094 struct sctp_queued_to_read *ctl;
4095
4096 for (i = 0; i < asoc->streamincnt; i++) {
4097 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4098 /* We have somethings on the streamin queue */
4099 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4100 while (ctl) {
4101 TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4102 ctl, next);
4103 sctp_free_remote_addr(ctl->whoFrom);
4104 if (ctl->data) {
4105 sctp_m_freem(ctl->data);
4106 ctl->data = NULL;
4107 }
4108 /*
4109 * We don't free the address here
4110 * since all the net's were freed
4111 * above.
4112 */
4113 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4114 SCTP_DECR_READQ_COUNT();
4115 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4116 }
4117 }
4118 }
4119 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4120 asoc->strmin = NULL;
4121 }
4122 asoc->streamincnt = 0;
4123 while (!TAILQ_EMPTY(&asoc->nets)) {
4124 /* sa_ignore FREED_MEMORY */
4125 net = TAILQ_FIRST(&asoc->nets);
4126 /* pull from list */
4127 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4128#ifdef INVARIANTS
4129 panic("no net's left alloc'ed, or list points to itself");
4130#endif
4131 break;
4132 }
4133 prev = net;
4134 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4135 sctp_free_remote_addr(net);
4136 }
4137
4138 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4139 /* sa_ignore FREED_MEMORY */
4140 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4141 sctp_remove_laddr(laddr);
4142 }
4143
4144 /* pending asconf (address) parameters */
4145 while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4146 /* sa_ignore FREED_MEMORY */
4147 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4148 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4149 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4150 }
4151 if (asoc->last_asconf_ack_sent != NULL) {
4152 sctp_m_freem(asoc->last_asconf_ack_sent);
4153 asoc->last_asconf_ack_sent = NULL;
4154 }
4155 /* clean up auth stuff */
4156 if (asoc->local_hmacs)
4157 sctp_free_hmaclist(asoc->local_hmacs);
4158 if (asoc->peer_hmacs)
4159 sctp_free_hmaclist(asoc->peer_hmacs);
4160
4161 if (asoc->local_auth_chunks)
4162 sctp_free_chunklist(asoc->local_auth_chunks);
4163 if (asoc->peer_auth_chunks)
4164 sctp_free_chunklist(asoc->peer_auth_chunks);
4165
4166 sctp_free_authinfo(&asoc->authinfo);
4167
4168 shared_key = LIST_FIRST(&asoc->shared_keys);
4169 while (shared_key) {
4170 LIST_REMOVE(shared_key, next);
4171 sctp_free_sharedkey(shared_key);
4172 /* sa_ignore FREED_MEMORY */
4173 shared_key = LIST_FIRST(&asoc->shared_keys);
4174 }
4175
4176 /* Insert new items here :> */
4177
4178 /* Get rid of LOCK */
4179 SCTP_TCB_LOCK_DESTROY(stcb);
4180 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4181 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4182 SCTP_INP_INFO_WUNLOCK();
4183 SCTP_INP_RLOCK(inp);
4184 }
4185#ifdef SCTP_TRACK_FREED_ASOCS
4186 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4187 /* now clean up the tasoc itself */
4188 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4189 SCTP_DECR_ASOC_COUNT();
4190 } else {
4191 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4192 }
4193#else
4194 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4195 SCTP_DECR_ASOC_COUNT();
4196#endif
4197 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4198 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4199 /*
4200 * If its NOT the inp_free calling us AND sctp_close
4201 * as been called, we call back...
4202 */
4203 SCTP_INP_RUNLOCK(inp);
4204 /*
4205 * This will start the kill timer (if we are the
4206 * lastone) since we hold an increment yet. But this
4207 * is the only safe way to do this since otherwise
4208 * if the socket closes at the same time we are here
4209 * we might collide in the cleanup.
4210 */
4211 sctp_inpcb_free(inp,
4212 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4213 SCTP_CALLED_DIRECTLY_NOCMPSET);
4214 SCTP_INP_DECR_REF(inp);
4215 goto out_of;
4216 } else {
4217 /* The socket is still open. */
4218 SCTP_INP_DECR_REF(inp);
4219 }
4220 }
4221 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4222 SCTP_INP_RUNLOCK(inp);
4223 }
4224out_of:
4225 /* destroyed the asoc */
4226#ifdef SCTP_LOG_CLOSING
4227 sctp_log_closing(inp, NULL, 11);
4228#endif
4229 return (1);
4230}
4231
4232
4233
4234/*
4235 * determine if a destination is "reachable" based upon the addresses bound
4236 * to the current endpoint (e.g. only v4 or v6 currently bound)
4237 */
4238/*
4239 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4240 * assoc level v4/v6 flags, as the assoc *may* not have the same address
4241 * types bound as its endpoint
4242 */
4243int
4244sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4245{
4246 struct sctp_inpcb *inp;
4247 int answer;
4248
4249 /*
4250 * No locks here, the TCB, in all cases is already locked and an
4251 * assoc is up. There is either a INP lock by the caller applied (in
4252 * asconf case when deleting an address) or NOT in the HB case,
4253 * however if HB then the INP increment is up and the INP will not
4254 * be removed (on top of the fact that we have a TCB lock). So we
4255 * only want to read the sctp_flags, which is either bound-all or
4256 * not.. no protection needed since once an assoc is up you can't be
4257 * changing your binding.
4258 */
4259 inp = stcb->sctp_ep;
4260 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4261 /* if bound all, destination is not restricted */
4262 /*
4263 * RRS: Question during lock work: Is this correct? If you
4264 * are bound-all you still might need to obey the V4--V6
4265 * flags??? IMO this bound-all stuff needs to be removed!
4266 */
4267 return (1);
4268 }
4269 /* NOTE: all "scope" checks are done when local addresses are added */
4270 if (destaddr->sa_family == AF_INET6) {
4271 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4272 } else if (destaddr->sa_family == AF_INET) {
4273 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4274 } else {
4275 /* invalid family, so it's unreachable */
4276 answer = 0;
4277 }
4278 return (answer);
4279}
4280
4281/*
4282 * update the inp_vflags on an endpoint
4283 */
4284static void
4285sctp_update_ep_vflag(struct sctp_inpcb *inp)
4286{
4287 struct sctp_laddr *laddr;
4288
4289 /* first clear the flag */
4290 inp->ip_inp.inp.inp_vflag = 0;
4291 /* set the flag based on addresses on the ep list */
4292 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4293 if (laddr->ifa == NULL) {
4294 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4295 __FUNCTION__);
4296 continue;
4297 }
4298 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4299 continue;
4300 }
4301 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4302 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4303 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4304 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4305 }
4306 }
4307}
4308
4309/*
4310 * Add the address to the endpoint local address list There is nothing to be
4311 * done if we are bound to all addresses
4312 */
4313void
4314sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4315{
4316 struct sctp_laddr *laddr;
4317 int fnd, error = 0;
4318
4319 fnd = 0;
4320
4321 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4322 /* You are already bound to all. You have it already */
4323 return;
4324 }
4325 if (ifa->address.sa.sa_family == AF_INET6) {
4326 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4327 /* Can't bind a non-useable addr. */
4328 return;
4329 }
4330 }
4331 /* first, is it already present? */
4332 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4333 if (laddr->ifa == ifa) {
4334 fnd = 1;
4335 break;
4336 }
4337 }
4338
4339 if (fnd == 0) {
4340 /* Not in the ep list */
4341 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4342 if (error != 0)
4343 return;
4344 inp->laddr_count++;
4345 /* update inp_vflag flags */
4346 if (ifa->address.sa.sa_family == AF_INET6) {
4347 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4348 } else if (ifa->address.sa.sa_family == AF_INET) {
4349 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4350 }
4351 }
4352 return;
4353}
4354
4355
4356/*
4357 * select a new (hopefully reachable) destination net (should only be used
4358 * when we deleted an ep addr that is the only usable source address to reach
4359 * the destination net)
4360 */
4361static void
4362sctp_select_primary_destination(struct sctp_tcb *stcb)
4363{
4364 struct sctp_nets *net;
4365
4366 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4367 /* for now, we'll just pick the first reachable one we find */
4368 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4369 continue;
4370 if (sctp_destination_is_reachable(stcb,
4371 (struct sockaddr *)&net->ro._l_addr)) {
4372 /* found a reachable destination */
4373 stcb->asoc.primary_destination = net;
4374 }
4375 }
4376 /* I can't there from here! ...we're gonna die shortly... */
4377}
4378
4379
4380/*
4381 * Delete the address from the endpoint local address list There is nothing
4382 * to be done if we are bound to all addresses
4383 */
4384void
4385sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4386{
4387 struct sctp_laddr *laddr;
4388 int fnd;
4389
4390 fnd = 0;
4391 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4392 /* You are already bound to all. You have it already */
4393 return;
4394 }
4395 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4396 if (laddr->ifa == ifa) {
4397 fnd = 1;
4398 break;
4399 }
4400 }
4401 if (fnd && (inp->laddr_count < 2)) {
4402 /* can't delete unless there are at LEAST 2 addresses */
4403 return;
4404 }
4405 if (fnd) {
4406 /*
4407 * clean up any use of this address go through our
4408 * associations and clear any last_used_address that match
4409 * this one for each assoc, see if a new primary_destination
4410 * is needed
4411 */
4412 struct sctp_tcb *stcb;
4413
4414 /* clean up "next_addr_touse" */
4415 if (inp->next_addr_touse == laddr)
4416 /* delete this address */
4417 inp->next_addr_touse = NULL;
4418
4419 /* clean up "last_used_address" */
4420 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4421 struct sctp_nets *net;
4422
4423 SCTP_TCB_LOCK(stcb);
4424 if (stcb->asoc.last_used_address == laddr)
4425 /* delete this address */
4426 stcb->asoc.last_used_address = NULL;
4427 /*
4428 * Now spin through all the nets and purge any ref
4429 * to laddr
4430 */
4431 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4432 if (net->ro._s_addr &&
4433 (net->ro._s_addr->ifa == laddr->ifa)) {
4434 /* Yep, purge src address selected */
4435 sctp_rtentry_t *rt;
4436
4437 /* delete this address if cached */
4438 rt = net->ro.ro_rt;
4439 if (rt != NULL) {
4440 RTFREE(rt);
4441 net->ro.ro_rt = NULL;
4442 }
4443 sctp_free_ifa(net->ro._s_addr);
4444 net->ro._s_addr = NULL;
4445 net->src_addr_selected = 0;
4446 }
4447 }
4448 SCTP_TCB_UNLOCK(stcb);
4449 } /* for each tcb */
4450 /* remove it from the ep list */
4451 sctp_remove_laddr(laddr);
4452 inp->laddr_count--;
4453 /* update inp_vflag flags */
4454 sctp_update_ep_vflag(inp);
4455 }
4456 return;
4457}
4458
4459/*
4460 * Add the addr to the TCB local address list For the BOUNDALL or dynamic
4461 * case, this is a "pending" address list (eg. addresses waiting for an
4462 * ASCONF-ACK response) For the subset binding, static case, this is a
4463 * "valid" address list
4464 */
4465void
4466sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list)
4467{
4468 struct sctp_inpcb *inp;
4469 struct sctp_laddr *laddr;
4470 struct sctpladdr *list;
4471
4472 /*
4473 * Assumes TCB is locked.. and possibly the INP. May need to
4474 * confirm/fix that if we need it and is not the case.
4475 */
4476 list = &stcb->asoc.sctp_restricted_addrs;
4477
4478 inp = stcb->sctp_ep;
4479 if (ifa->address.sa.sa_family == AF_INET6) {
4480 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4481 /* Can't bind a non-existent addr. */
4482 return;
4483 }
4484 }
4485 /* does the address already exist? */
4486 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4487 if (laddr->ifa == ifa) {
4488 return;
4489 }
4490 }
4491
4492 /* add to the list */
4493 (void)sctp_insert_laddr(list, ifa, 0);
4494 return;
4495}
4496
4497/*
4498 * insert an laddr entry with the given ifa for the desired list
4499 */
4500int
4501sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4502{
4503 struct sctp_laddr *laddr;
4504
4505 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4506 if (laddr == NULL) {
4507 /* out of memory? */
4508 return (EINVAL);
4509 }
4510 SCTP_INCR_LADDR_COUNT();
4511 bzero(laddr, sizeof(*laddr));
4512 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4513 laddr->ifa = ifa;
4514 laddr->action = act;
4515 atomic_add_int(&ifa->refcount, 1);
4516 /* insert it */
4517 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4518
4519 return (0);
4520}
4521
4522/*
4523 * Remove an laddr entry from the local address list (on an assoc)
4524 */
4525void
4526sctp_remove_laddr(struct sctp_laddr *laddr)
4527{
4528
4529 /* remove from the list */
4530 LIST_REMOVE(laddr, sctp_nxt_addr);
4531 sctp_free_ifa(laddr->ifa);
4532 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4533 SCTP_DECR_LADDR_COUNT();
4534}
4535
4536/*
4537 * Remove an address from the TCB local address list
4538 */
4539void
4540sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4541{
4542 struct sctp_inpcb *inp;
4543 struct sctp_laddr *laddr;
4544
4545 /*
4546 * This is called by asconf work. It is assumed that a) The TCB is
4547 * locked and b) The INP is locked. This is true in as much as I can
4548 * trace through the entry asconf code where I did these locks.
4549 * Again, the ASCONF code is a bit different in that it does lock
4550 * the INP during its work often times. This must be since we don't
4551 * want other proc's looking up things while what they are looking
4552 * up is changing :-D
4553 */
4554
4555 inp = stcb->sctp_ep;
4556 /* if subset bound and don't allow ASCONF's, can't delete last */
4557 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4558 (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4559 if (stcb->asoc.numnets < 2) {
4560 /* can't delete last address */
4561 return;
4562 }
4563 }
4564 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4565 /* remove the address if it exists */
4566 if (laddr->ifa == NULL)
4567 continue;
4568 if (laddr->ifa == ifa) {
4569 sctp_remove_laddr(laddr);
4570 return;
4571 }
4572 }
4573
4574 /* address not found! */
4575 return;
4576}
4577
4578static char sctp_pcb_initialized = 0;
4579
4580/*
4581 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4582 */
4583/* sysctl */
4584static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4585static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4586
4587void
4588sctp_pcb_init()
4589{
4590 /*
4591 * SCTP initialization for the PCB structures should be called by
4592 * the sctp_init() funciton.
4593 */
4594 int i;
4595
4596 if (sctp_pcb_initialized != 0) {
4597 /* error I was called twice */
4598 return;
4599 }
4600 sctp_pcb_initialized = 1;
4601
4602 bzero(&sctpstat, sizeof(struct sctpstat));
4603 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4604 /* init the empty list of (All) Endpoints */
4605 LIST_INIT(&sctppcbinfo.listhead);
4606
4607 /* init the iterator head */
4608 TAILQ_INIT(&sctppcbinfo.iteratorhead);
4609
4610 /* init the hash table of endpoints */
4611 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4612 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4613 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4614 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4615 &sctppcbinfo.hashasocmark);
4616 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4617 &sctppcbinfo.hashmark);
4618 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4619 &sctppcbinfo.hashtcpmark);
4620 sctppcbinfo.hashtblsize = sctp_hashtblsize;
4621
4622 /* init the small hash table we use to track restarted asoc's */
4623 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4624 &sctppcbinfo.hashrestartmark);
4625
4626
4627 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4628 &sctppcbinfo.hashvrfmark);
4629
4630 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
4631 &sctppcbinfo.vrf_ifn_hashmark);
4632
4633 /* init the zones */
4634 /*
4635 * FIX ME: Should check for NULL returns, but if it does fail we are
4636 * doomed to panic anyways... add later maybe.
4637 */
4638 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4639 sizeof(struct sctp_inpcb), maxsockets);
4640
4641 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4642 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4643
4644 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4645 sizeof(struct sctp_laddr),
4646 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4647
4648 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4649 sizeof(struct sctp_nets),
4650 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4651
4652 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4653 sizeof(struct sctp_tmit_chunk),
4654 (sctp_max_number_of_assoc * sctp_chunkscale));
4655
4656 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4657 sizeof(struct sctp_queued_to_read),
4658 (sctp_max_number_of_assoc * sctp_chunkscale));
4659
4660 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4661 sizeof(struct sctp_stream_queue_pending),
4662 (sctp_max_number_of_assoc * sctp_chunkscale));
4663
4664 /* Master Lock INIT for info structure */
4665 SCTP_INP_INFO_LOCK_INIT();
4666 SCTP_STATLOG_INIT_LOCK();
4667 SCTP_ITERATOR_LOCK_INIT();
4668
4669 SCTP_IPI_COUNT_INIT();
4670 SCTP_IPI_ADDR_INIT();
4671 SCTP_IPI_ITERATOR_WQ_INIT();
4672#ifdef SCTP_PACKET_LOGGING
4673 SCTP_IP_PKTLOG_INIT();
4674#endif
4675 LIST_INIT(&sctppcbinfo.addr_wq);
4676
4677 /* not sure if we need all the counts */
4678 sctppcbinfo.ipi_count_ep = 0;
4679 /* assoc/tcb zone info */
4680 sctppcbinfo.ipi_count_asoc = 0;
4681 /* local addrlist zone info */
4682 sctppcbinfo.ipi_count_laddr = 0;
4683 /* remote addrlist zone info */
4684 sctppcbinfo.ipi_count_raddr = 0;
4685 /* chunk info */
4686 sctppcbinfo.ipi_count_chunk = 0;
4687
4688 /* socket queue zone info */
4689 sctppcbinfo.ipi_count_readq = 0;
4690
4691 /* stream out queue cont */
4692 sctppcbinfo.ipi_count_strmoq = 0;
4693
4694 sctppcbinfo.ipi_free_strmoq = 0;
4695 sctppcbinfo.ipi_free_chunks = 0;
4696
4697 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4698
4699 /* Init the TIMEWAIT list */
4700 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
4701 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4702 }
4703
4704#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4705 sctppcbinfo.iterator_running = 0;
4706 sctp_startup_iterator();
4707#endif
4708
4709 /*
4710 * INIT the default VRF which for BSD is the only one, other O/S's
4711 * may have more. But initially they must start with one and then
4712 * add the VRF's as addresses are added.
4713 */
4714 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4715
4716}
4717
4718
4719int
4720sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4721 int iphlen, int offset, int limit, struct sctphdr *sh,
4722 struct sockaddr *altsa)
4723{
4724 /*
4725 * grub through the INIT pulling addresses and loading them to the
4726 * nets structure in the asoc. The from address in the mbuf should
4727 * also be loaded (if it is not already). This routine can be called
4728 * with either INIT or INIT-ACK's as long as the m points to the IP
4729 * packet and the offset points to the beginning of the parameters.
4730 */
4731 struct sctp_inpcb *inp, *l_inp;
4732 struct sctp_nets *net, *net_tmp;
4733 struct ip *iph;
4734 struct sctp_paramhdr *phdr, parm_buf;
4735 struct sctp_tcb *stcb_tmp;
4736 uint16_t ptype, plen;
4737 struct sockaddr *sa;
4738 struct sockaddr_storage dest_store;
4739 struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4740 struct sockaddr_in sin;
4741 struct sockaddr_in6 sin6;
4742 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4743 struct sctp_auth_random *p_random = NULL;
4744 uint16_t random_len = 0;
4745 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4746 struct sctp_auth_hmac_algo *hmacs = NULL;
4747 uint16_t hmacs_len = 0;
4748 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4749 struct sctp_auth_chunk_list *chunks = NULL;
4750 uint16_t num_chunks = 0;
4751 sctp_key_t *new_key;
4752 uint32_t keylen;
4753 int got_random = 0, got_hmacs = 0, got_chklist = 0;
4754
4755 /* First get the destination address setup too. */
4756 memset(&sin, 0, sizeof(sin));
4757 memset(&sin6, 0, sizeof(sin6));
4758
4759 sin.sin_family = AF_INET;
4760 sin.sin_len = sizeof(sin);
4761 sin.sin_port = stcb->rport;
4762
4763 sin6.sin6_family = AF_INET6;
4764 sin6.sin6_len = sizeof(struct sockaddr_in6);
4765 sin6.sin6_port = stcb->rport;
4766 if (altsa == NULL) {
4767 iph = mtod(m, struct ip *);
4768 if (iph->ip_v == IPVERSION) {
4769 /* its IPv4 */
4770 struct sockaddr_in *sin_2;
4771
4772 sin_2 = (struct sockaddr_in *)(local_sa);
4773 memset(sin_2, 0, sizeof(sin));
4774 sin_2->sin_family = AF_INET;
4775 sin_2->sin_len = sizeof(sin);
4776 sin_2->sin_port = sh->dest_port;
4777 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4778 sin.sin_addr = iph->ip_src;
4779 sa = (struct sockaddr *)&sin;
4780 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4781 /* its IPv6 */
4782 struct ip6_hdr *ip6;
4783 struct sockaddr_in6 *sin6_2;
4784
4785 ip6 = mtod(m, struct ip6_hdr *);
4786 sin6_2 = (struct sockaddr_in6 *)(local_sa);
4787 memset(sin6_2, 0, sizeof(sin6));
4788 sin6_2->sin6_family = AF_INET6;
4789 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4790 sin6_2->sin6_port = sh->dest_port;
4791 sin6.sin6_addr = ip6->ip6_src;
4792 sa = (struct sockaddr *)&sin6;
4793 } else {
4794 sa = NULL;
4795 }
4796 } else {
4797 /*
4798 * For cookies we use the src address NOT from the packet
4799 * but from the original INIT
4800 */
4801 sa = altsa;
4802 }
4803 /* Turn off ECN until we get through all params */
4804 stcb->asoc.ecn_allowed = 0;
4805 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4806 /* mark all addresses that we have currently on the list */
4807 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4808 }
4809 /* does the source address already exist? if so skip it */
4810 l_inp = inp = stcb->sctp_ep;
4811
4812 atomic_add_int(&stcb->asoc.refcnt, 1);
4813 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4814 atomic_add_int(&stcb->asoc.refcnt, -1);
4815
4816 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4817 /* we must add the source address */
4818 /* no scope set here since we have a tcb already. */
4819 if ((sa->sa_family == AF_INET) &&
4820 (stcb->asoc.ipv4_addr_legal)) {
4821 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4822 return (-1);
4823 }
4824 } else if ((sa->sa_family == AF_INET6) &&
4825 (stcb->asoc.ipv6_addr_legal)) {
4826 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4827 return (-2);
4828 }
4829 }
4830 } else {
4831 if (net_tmp != NULL && stcb_tmp == stcb) {
4832 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4833 } else if (stcb_tmp != stcb) {
4834 /* It belongs to another association? */
4835 if (stcb_tmp)
4836 SCTP_TCB_UNLOCK(stcb_tmp);
4837 return (-3);
4838 }
4839 }
4840 if (stcb->asoc.state == 0) {
4841 /* the assoc was freed? */
4842 return (-4);
4843 }
4844 /* now we must go through each of the params. */
4845 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4846 while (phdr) {
4847 ptype = ntohs(phdr->param_type);
4848 plen = ntohs(phdr->param_length);
4849 /*
4850 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4851 * (int)plen);
4852 */
4853 if (offset + plen > limit) {
4854 break;
4855 }
4856 if (plen == 0) {
4857 break;
4858 }
4859 if (ptype == SCTP_IPV4_ADDRESS) {
4860 if (stcb->asoc.ipv4_addr_legal) {
4861 struct sctp_ipv4addr_param *p4, p4_buf;
4862
4863 /* ok get the v4 address and check/add */
4864 phdr = sctp_get_next_param(m, offset,
4865 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4866 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4867 phdr == NULL) {
4868 return (-5);
4869 }
4870 p4 = (struct sctp_ipv4addr_param *)phdr;
4871 sin.sin_addr.s_addr = p4->addr;
4872 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
4873 /* Skip multi-cast addresses */
4874 goto next_param;
4875 }
4876 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
4877 (sin.sin_addr.s_addr == INADDR_ANY)) {
4878 goto next_param;
4879 }
4880 sa = (struct sockaddr *)&sin;
4881 inp = stcb->sctp_ep;
4882 atomic_add_int(&stcb->asoc.refcnt, 1);
4883 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4884 local_sa, stcb);
4885 atomic_add_int(&stcb->asoc.refcnt, -1);
4886
4887 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4888 inp == NULL) {
4889 /* we must add the source address */
4890 /*
4891 * no scope set since we have a tcb
4892 * already
4893 */
4894
4895 /*
4896 * we must validate the state again
4897 * here
4898 */
4899 if (stcb->asoc.state == 0) {
4900 /* the assoc was freed? */
4901 return (-7);
4902 }
4903 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4904 return (-8);
4905 }
4906 } else if (stcb_tmp == stcb) {
4907 if (stcb->asoc.state == 0) {
4908 /* the assoc was freed? */
4909 return (-10);
4910 }
4911 if (net != NULL) {
4912 /* clear flag */
4913 net->dest_state &=
4914 ~SCTP_ADDR_NOT_IN_ASSOC;
4915 }
4916 } else {
4917 /*
4918 * strange, address is in another
4919 * assoc? straighten out locks.
4920 */
4921 if (stcb->asoc.state == 0) {
4922 /* the assoc was freed? */
4923 return (-12);
4924 }
4925 return (-13);
4926 }
4927 }
4928 } else if (ptype == SCTP_IPV6_ADDRESS) {
4929 if (stcb->asoc.ipv6_addr_legal) {
4930 /* ok get the v6 address and check/add */
4931 struct sctp_ipv6addr_param *p6, p6_buf;
4932
4933 phdr = sctp_get_next_param(m, offset,
4934 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4935 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4936 phdr == NULL) {
4937 return (-14);
4938 }
4939 p6 = (struct sctp_ipv6addr_param *)phdr;
4940 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4941 sizeof(p6->addr));
4942 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
4943 /* Skip multi-cast addresses */
4944 goto next_param;
4945 }
4946 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
4947 /*
4948 * Link local make no sense without
4949 * scope
4950 */
4951 goto next_param;
4952 }
4953 sa = (struct sockaddr *)&sin6;
4954 inp = stcb->sctp_ep;
4955 atomic_add_int(&stcb->asoc.refcnt, 1);
4956 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4957 local_sa, stcb);
4958 atomic_add_int(&stcb->asoc.refcnt, -1);
4959 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4960 inp == NULL)) {
4961 /*
4962 * we must validate the state again
4963 * here
4964 */
4965 if (stcb->asoc.state == 0) {
4966 /* the assoc was freed? */
4967 return (-16);
4968 }
4969 /*
4970 * we must add the address, no scope
4971 * set
4972 */
4973 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4974 return (-17);
4975 }
4976 } else if (stcb_tmp == stcb) {
4977 /*
4978 * we must validate the state again
4979 * here
4980 */
4981 if (stcb->asoc.state == 0) {
4982 /* the assoc was freed? */
4983 return (-19);
4984 }
4985 if (net != NULL) {
4986 /* clear flag */
4987 net->dest_state &=
4988 ~SCTP_ADDR_NOT_IN_ASSOC;
4989 }
4990 } else {
4991 /*
4992 * strange, address is in another
4993 * assoc? straighten out locks.
4994 */
4995 if (stcb->asoc.state == 0) {
4996 /* the assoc was freed? */
4997 return (-21);
4998 }
4999 return (-22);
5000 }
5001 }
5002 } else if (ptype == SCTP_ECN_CAPABLE) {
5003 stcb->asoc.ecn_allowed = 1;
5004 } else if (ptype == SCTP_ULP_ADAPTATION) {
5005 if (stcb->asoc.state != SCTP_STATE_OPEN) {
5006 struct sctp_adaptation_layer_indication ai,
5007 *aip;
5008
5009 phdr = sctp_get_next_param(m, offset,
5010 (struct sctp_paramhdr *)&ai, sizeof(ai));
5011 aip = (struct sctp_adaptation_layer_indication *)phdr;
5012 if (aip) {
5013 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
5014 stcb, ntohl(aip->indication), NULL);
5015 }
5016 }
5017 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5018 struct sctp_asconf_addr_param lstore, *fee;
5019 struct sctp_asconf_addrv4_param *fii;
5020 int lptype;
5021 struct sockaddr *lsa = NULL;
5022
5023 stcb->asoc.peer_supports_asconf = 1;
5024 if (plen > sizeof(lstore)) {
5025 return (-23);
5026 }
5027 phdr = sctp_get_next_param(m, offset,
5028 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5029 if (phdr == NULL) {
5030 return (-24);
5031 }
5032 fee = (struct sctp_asconf_addr_param *)phdr;
5033 lptype = ntohs(fee->addrp.ph.param_type);
5034 if (lptype == SCTP_IPV4_ADDRESS) {
5035 if (plen !=
5036 sizeof(struct sctp_asconf_addrv4_param)) {
5037 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5038 (int)sizeof(struct sctp_asconf_addrv4_param),
5039 plen);
5040 } else {
5041 fii = (struct sctp_asconf_addrv4_param *)fee;
5042 sin.sin_addr.s_addr = fii->addrp.addr;
5043 lsa = (struct sockaddr *)&sin;
5044 }
5045 } else if (lptype == SCTP_IPV6_ADDRESS) {
5046 if (plen !=
5047 sizeof(struct sctp_asconf_addr_param)) {
5048 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5049 (int)sizeof(struct sctp_asconf_addr_param),
5050 plen);
5051 } else {
5052 memcpy(sin6.sin6_addr.s6_addr,
5053 fee->addrp.addr,
5054 sizeof(fee->addrp.addr));
5055 lsa = (struct sockaddr *)&sin6;
5056 }
5057 }
5058 if (lsa) {
5059 (void)sctp_set_primary_addr(stcb, sa, NULL);
5060 }
5061 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5062 /* Peer supports pr-sctp */
5063 stcb->asoc.peer_supports_prsctp = 1;
5064 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5065 /* A supported extension chunk */
5066 struct sctp_supported_chunk_types_param *pr_supported;
5067 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5068 int num_ent, i;
5069
5070 phdr = sctp_get_next_param(m, offset,
5071 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5072 if (phdr == NULL) {
5073 return (-25);
5074 }
5075 stcb->asoc.peer_supports_asconf = 0;
5076 stcb->asoc.peer_supports_prsctp = 0;
5077 stcb->asoc.peer_supports_pktdrop = 0;
5078 stcb->asoc.peer_supports_strreset = 0;
5079 stcb->asoc.peer_supports_auth = 0;
5080 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5081 num_ent = plen - sizeof(struct sctp_paramhdr);
5082 for (i = 0; i < num_ent; i++) {
5083 switch (pr_supported->chunk_types[i]) {
5084 case SCTP_ASCONF:
5085 case SCTP_ASCONF_ACK:
5086 stcb->asoc.peer_supports_asconf = 1;
5087 break;
5088 case SCTP_FORWARD_CUM_TSN:
5089 stcb->asoc.peer_supports_prsctp = 1;
5090 break;
5091 case SCTP_PACKET_DROPPED:
5092 stcb->asoc.peer_supports_pktdrop = 1;
5093 break;
5094 case SCTP_STREAM_RESET:
5095 stcb->asoc.peer_supports_strreset = 1;
5096 break;
5097 case SCTP_AUTHENTICATION:
5098 stcb->asoc.peer_supports_auth = 1;
5099 break;
5100 default:
5101 /* one I have not learned yet */
5102 break;
5103
5104 }
5105 }
5106 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5107 /* Peer supports ECN-nonce */
5108 stcb->asoc.peer_supports_ecn_nonce = 1;
5109 stcb->asoc.ecn_nonce_allowed = 1;
5110 } else if (ptype == SCTP_RANDOM) {
5111 if (plen > sizeof(random_store))
5112 break;
5113 if (got_random) {
5114 /* already processed a RANDOM */
5115 goto next_param;
5116 }
5117 phdr = sctp_get_next_param(m, offset,
5118 (struct sctp_paramhdr *)random_store,
5119 min(sizeof(random_store), plen));
5120 if (phdr == NULL)
5121 return (-26);
5122 p_random = (struct sctp_auth_random *)phdr;
5123 random_len = plen - sizeof(*p_random);
5124 /* enforce the random length */
5125 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5126 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5127 return (-27);
5128 }
5129 got_random = 1;
5130 } else if (ptype == SCTP_HMAC_LIST) {
5131 int num_hmacs;
5132 int i;
5133
5134 if (plen > sizeof(hmacs_store))
5135 break;
5136 if (got_hmacs) {
5137 /* already processed a HMAC list */
5138 goto next_param;
5139 }
5140 phdr = sctp_get_next_param(m, offset,
5141 (struct sctp_paramhdr *)hmacs_store,
5142 min(plen, sizeof(hmacs_store)));
5143 if (phdr == NULL)
5144 return (-28);
5145 hmacs = (struct sctp_auth_hmac_algo *)phdr;
5146 hmacs_len = plen - sizeof(*hmacs);
5147 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5148 /* validate the hmac list */
5149 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5150 return (-29);
5151 }
5152 if (stcb->asoc.peer_hmacs != NULL)
5153 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5154 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5155 if (stcb->asoc.peer_hmacs != NULL) {
5156 for (i = 0; i < num_hmacs; i++) {
5157 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5158 ntohs(hmacs->hmac_ids[i]));
5159 }
5160 }
5161 got_hmacs = 1;
5162 } else if (ptype == SCTP_CHUNK_LIST) {
5163 int i;
5164
5165 if (plen > sizeof(chunks_store))
5166 break;
5167 if (got_chklist) {
5168 /* already processed a Chunks list */
5169 goto next_param;
5170 }
5171 phdr = sctp_get_next_param(m, offset,
5172 (struct sctp_paramhdr *)chunks_store,
5173 min(plen, sizeof(chunks_store)));
5174 if (phdr == NULL)
5175 return (-30);
5176 chunks = (struct sctp_auth_chunk_list *)phdr;
5177 num_chunks = plen - sizeof(*chunks);
5178 if (stcb->asoc.peer_auth_chunks != NULL)
5179 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5180 else
5181 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5182 for (i = 0; i < num_chunks; i++) {
5183 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5184 stcb->asoc.peer_auth_chunks);
5185 }
5186 got_chklist = 1;
5187 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5188 (ptype == SCTP_STATE_COOKIE) ||
5189 (ptype == SCTP_UNRECOG_PARAM) ||
5190 (ptype == SCTP_COOKIE_PRESERVE) ||
5191 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5192 (ptype == SCTP_ADD_IP_ADDRESS) ||
5193 (ptype == SCTP_DEL_IP_ADDRESS) ||
5194 (ptype == SCTP_ERROR_CAUSE_IND) ||
5195 (ptype == SCTP_SUCCESS_REPORT)) {
5196 /* don't care */ ;
5197 } else {
5198 if ((ptype & 0x8000) == 0x0000) {
5199 /*
5200 * must stop processing the rest of the
5201 * param's. Any report bits were handled
5202 * with the call to
5203 * sctp_arethere_unrecognized_parameters()
5204 * when the INIT or INIT-ACK was first seen.
5205 */
5206 break;
5207 }
5208 }
5209next_param:
5210 offset += SCTP_SIZE32(plen);
5211 if (offset >= limit) {
5212 break;
5213 }
5214 phdr = sctp_get_next_param(m, offset, &parm_buf,
5215 sizeof(parm_buf));
5216 }
5217 /* Now check to see if we need to purge any addresses */
5218 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5219 net_tmp = TAILQ_NEXT(net, sctp_next);
5220 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5221 SCTP_ADDR_NOT_IN_ASSOC) {
5222 /* This address has been removed from the asoc */
5223 /* remove and free it */
5224 stcb->asoc.numnets--;
5225 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5226 sctp_free_remote_addr(net);
5227 if (net == stcb->asoc.primary_destination) {
5228 stcb->asoc.primary_destination = NULL;
5229 sctp_select_primary_destination(stcb);
5230 }
5231 }
5232 }
5233 /* validate authentication required parameters */
5234 if (got_random && got_hmacs) {
5235 stcb->asoc.peer_supports_auth = 1;
5236 } else {
5237 stcb->asoc.peer_supports_auth = 0;
5238 }
5239 if (!stcb->asoc.peer_supports_auth && got_chklist) {
5240 /* peer does not support auth but sent a chunks list? */
5241 return (-31);
5242 }
5243 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5244 !stcb->asoc.peer_supports_auth) {
5245 /* peer supports asconf but not auth? */
5246 return (-32);
5247 }
5248 /* concatenate the full random key */
5249#ifdef SCTP_AUTH_DRAFT_04
5250 keylen = random_len;
5251 new_key = sctp_alloc_key(keylen);
5252 if (new_key != NULL) {
5253 /* copy in the RANDOM */
5254 if (p_random != NULL)
5255 bcopy(p_random->random_data, new_key->key, random_len);
5256 }
5257#else
5258 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5259 sizeof(*hmacs) + hmacs_len;
5260 new_key = sctp_alloc_key(keylen);
5261 if (new_key != NULL) {
5262 /* copy in the RANDOM */
5263 if (p_random != NULL) {
5264 keylen = sizeof(*p_random) + random_len;
5265 bcopy(p_random, new_key->key, keylen);
5266 }
5267 /* append in the AUTH chunks */
5268 if (chunks != NULL) {
5269 bcopy(chunks, new_key->key + keylen,
5270 sizeof(*chunks) + num_chunks);
5271 keylen += sizeof(*chunks) + num_chunks;
5272 }
5273 /* append in the HMACs */
5274 if (hmacs != NULL) {
5275 bcopy(hmacs, new_key->key + keylen,
5276 sizeof(*hmacs) + hmacs_len);
5277 }
5278 }
5279#endif
5280 else {
5281 /* failed to get memory for the key */
5282 return (-33);
5283 }
5284 if (stcb->asoc.authinfo.peer_random != NULL)
5285 sctp_free_key(stcb->asoc.authinfo.peer_random);
5286 stcb->asoc.authinfo.peer_random = new_key;
5287#ifdef SCTP_AUTH_DRAFT_04
5288 /* don't include the chunks and hmacs for draft -04 */
5289 stcb->asoc.authinfo.peer_random->keylen = random_len;
5290#endif
5291 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5292 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5293
5294 return (0);
5295}
5296
5297int
5298sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5299 struct sctp_nets *net)
5300{
5301 /* make sure the requested primary address exists in the assoc */
5302 if (net == NULL && sa)
5303 net = sctp_findnet(stcb, sa);
5304
5305 if (net == NULL) {
5306 /* didn't find the requested primary address! */
5307 return (-1);
5308 } else {
5309 /* set the primary address */
5310 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5311 /* Must be confirmed, so queue to set */
5312 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5313 return (0);
5314 }
5315 stcb->asoc.primary_destination = net;
5316 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5317 net = TAILQ_FIRST(&stcb->asoc.nets);
5318 if (net != stcb->asoc.primary_destination) {
5319 /*
5320 * first one on the list is NOT the primary
5321 * sctp_cmpaddr() is much more efficent if the
5322 * primary is the first on the list, make it so.
5323 */
5324 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5325 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5326 }
5327 return (0);
5328 }
5329}
5330
5331
5332int
5333sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5334{
5335 /*
5336 * This function serves two purposes. It will see if a TAG can be
5337 * re-used and return 1 for yes it is ok and 0 for don't use that
5338 * tag. A secondary function it will do is purge out old tags that
5339 * can be removed.
5340 */
5341 struct sctpasochead *head;
5342 struct sctpvtaghead *chain;
5343 struct sctp_tagblock *twait_block;
5344 struct sctp_tcb *stcb;
5345 int i;
5346
5347 SCTP_INP_INFO_WLOCK();
5348 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5349 /* First is the vtag in use ? */
5350
5351 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5352 sctppcbinfo.hashasocmark)];
5353 if (head == NULL) {
5354 goto check_restart;
5355 }
5356 LIST_FOREACH(stcb, head, sctp_asocs) {
5357
5358 if (stcb->asoc.my_vtag == tag) {
5359 /*
5360 * We should remove this if and return 0 always if
5361 * we want vtags unique across all endpoints. For
5362 * now within a endpoint is ok.
5363 */
5364 if (inp == stcb->sctp_ep) {
5365 /* bad tag, in use */
5366 SCTP_INP_INFO_WUNLOCK();
5367 return (0);
5368 }
5369 }
5370 }
5371check_restart:
5372 /* Now lets check the restart hash */
5373 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5374 sctppcbinfo.hashrestartmark)];
5375 if (head == NULL) {
5376 goto check_time_wait;
5377 }
5378 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5379 if (stcb->asoc.assoc_id == tag) {
5380 /* candidate */
5381 if (inp == stcb->sctp_ep) {
5382 /* bad tag, in use */
5383 SCTP_INP_INFO_WUNLOCK();
5384 return (0);
5385 }
5386 }
5387 }
5388check_time_wait:
5389 /* Now what about timed wait ? */
5390 if (!SCTP_LIST_EMPTY(chain)) {
5391 /*
5392 * Block(s) are present, lets see if we have this tag in the
5393 * list
5394 */
5395 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5396 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5397 if (twait_block->vtag_block[i].v_tag == 0) {
5398 /* not used */
5399 continue;
5400 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5401 now->tv_sec) {
5402 /* Audit expires this guy */
5403 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5404 twait_block->vtag_block[i].v_tag = 0;
5405 } else if (twait_block->vtag_block[i].v_tag ==
5406 tag) {
5407 /* Bad tag, sorry :< */
5408 SCTP_INP_INFO_WUNLOCK();
5409 return (0);
5410 }
5411 }
5412 }
5413 }
5414 /* Not found, ok to use the tag */
5415 SCTP_INP_INFO_WUNLOCK();
5416 return (1);
5417}
5418
5419
5420static sctp_assoc_t reneged_asoc_ids[256];
5421static uint8_t reneged_at = 0;
5422
5423
5424static void
5425sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5426{
5427 /*
5428 * We must hunt this association for MBUF's past the cumack (i.e.
5429 * out of order data that we can renege on).
5430 */
5431 struct sctp_association *asoc;
5432 struct sctp_tmit_chunk *chk, *nchk;
5433 uint32_t cumulative_tsn_p1, tsn;
5434 struct sctp_queued_to_read *ctl, *nctl;
5435 int cnt, strmat, gap;
5436
5437 /* We look for anything larger than the cum-ack + 1 */
5438
5439 SCTP_STAT_INCR(sctps_protocol_drain_calls);
5440 if (sctp_do_drain == 0) {
5441 return;
5442 }
5443 asoc = &stcb->asoc;
5444 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5445 /* none we can reneg on. */
5446 return;
5447 }
5448 SCTP_STAT_INCR(sctps_protocol_drains_done);
5449 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5450 cnt = 0;
5451 /* First look in the re-assembly queue */
5452 chk = TAILQ_FIRST(&asoc->reasmqueue);
5453 while (chk) {
5454 /* Get the next one */
5455 nchk = TAILQ_NEXT(chk, sctp_next);
5456 if (compare_with_wrap(chk->rec.data.TSN_seq,
5457 cumulative_tsn_p1, MAX_TSN)) {
5458 /* Yep it is above cum-ack */
5459 cnt++;
5460 tsn = chk->rec.data.TSN_seq;
5461 if (tsn >= asoc->mapping_array_base_tsn) {
5462 gap = tsn - asoc->mapping_array_base_tsn;
5463 } else {
5464 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5465 tsn + 1;
5466 }
5467 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5468 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5469 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5470 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5471 if (chk->data) {
5472 sctp_m_freem(chk->data);
5473 chk->data = NULL;
5474 }
| 35
36#include <netinet/sctp_os.h>
37#include <sys/proc.h>
38#include <netinet/sctp_var.h>
39#include <netinet/sctp_sysctl.h>
40#include <netinet/sctp_pcb.h>
41#include <netinet/sctputil.h>
42#include <netinet/sctp.h>
43#include <netinet/sctp_header.h>
44#include <netinet/sctp_asconf.h>
45#include <netinet/sctp_output.h>
46#include <netinet/sctp_timer.h>
47#include <netinet/sctp_bsd_addr.h>
48
49
50struct sctp_epinfo sctppcbinfo;
51
52/* FIX: we don't handle multiple link local scopes */
53/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
54int
55SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
56{
57 struct in6_addr tmp_a, tmp_b;
58
59 /* use a copy of a and b */
60 tmp_a = *a;
61 tmp_b = *b;
62 in6_clearscope(&tmp_a);
63 in6_clearscope(&tmp_b);
64 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
65}
66
67void
68sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
69{
70 /*
71 * We really don't need to lock this, but I will just because it
72 * does not hurt.
73 */
74 SCTP_INP_INFO_RLOCK();
75 spcb->ep_count = sctppcbinfo.ipi_count_ep;
76 spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
77 spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
78 spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
79 spcb->chk_count = sctppcbinfo.ipi_count_chunk;
80 spcb->readq_count = sctppcbinfo.ipi_count_readq;
81 spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
82 spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
83
84 SCTP_INP_INFO_RUNLOCK();
85}
86
87/*
88 * Addresses are added to VRF's (Virtual Router's). For BSD we
89 * have only the default VRF 0. We maintain a hash list of
90 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
91 * these has a list of addresses. When we add a new address
92 * to a VRF we lookup the ifn/ifn_index, if the ifn does
93 * not exist we create it and add it to the list of IFN's
94 * within the VRF. Once we have the sctp_ifn, we add the
95 * address to the list. So we look something like:
96 *
97 * hash-vrf-table
98 * vrf-> ifn-> ifn -> ifn
99 * vrf |
100 * ... +--ifa-> ifa -> ifa
101 * vrf
102 *
103 * We keep these seperate lists since the SCTP subsystem will
104 * point to these from its source address selection nets structure.
105 * When an address is deleted it does not happen right away on
106 * the SCTP side, it gets scheduled. What we do when a
107 * delete happens is immediately remove the address from
108 * the master list and decrement the refcount. As our
109 * addip iterator works through and frees the src address
110 * selection pointing to the sctp_ifa, eventually the refcount
111 * will reach 0 and we will delete it. Note that it is assumed
112 * that any locking on system level ifn/ifa is done at the
113 * caller of these functions and these routines will only
114 * lock the SCTP structures as they add or delete things.
115 *
116 * Other notes on VRF concepts.
117 * - An endpoint can be in multiple VRF's
118 * - An association lives within a VRF and only one VRF.
119 * - Any incoming packet we can deduce the VRF for by
120 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
121 * - Any downward send call or connect call must supply the
122 * VRF via ancillary data or via some sort of set default
123 * VRF socket option call (again for BSD no brainer since
124 * the VRF is always 0).
125 * - An endpoint may add multiple VRF's to it.
126 * - Listening sockets can accept associations in any
127 * of the VRF's they are in but the assoc will end up
128 * in only one VRF (gotten from the packet or connect/send).
129 *
130 */
131
132struct sctp_vrf *
133sctp_allocate_vrf(int vrf_id)
134{
135 struct sctp_vrf *vrf = NULL;
136 struct sctp_vrflist *bucket;
137
138 /* First allocate the VRF structure */
139 vrf = sctp_find_vrf(vrf_id);
140 if (vrf) {
141 /* Already allocated */
142 return (vrf);
143 }
144 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
145 SCTP_M_VRF);
146 if (vrf == NULL) {
147 /* No memory */
148#ifdef INVARIANTS
149 panic("No memory for VRF:%d", vrf_id);
150#endif
151 return (NULL);
152 }
153 /* setup the VRF */
154 memset(vrf, 0, sizeof(struct sctp_vrf));
155 vrf->vrf_id = vrf_id;
156 LIST_INIT(&vrf->ifnlist);
157 vrf->total_ifa_count = 0;
158 vrf->refcount = 0;
159 /* now also setup table ids */
160 SCTP_INIT_VRF_TABLEID(vrf);
161 /* Init the HASH of addresses */
162 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
163 &vrf->vrf_addr_hashmark);
164 if (vrf->vrf_addr_hash == NULL) {
165 /* No memory */
166#ifdef INVARIANTS
167 panic("No memory for VRF:%d", vrf_id);
168#endif
169 SCTP_FREE(vrf, SCTP_M_VRF);
170 return (NULL);
171 }
172 /* Add it to the hash table */
173 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
174 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
175 atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1);
176 return (vrf);
177}
178
179
180struct sctp_ifn *
181sctp_find_ifn(void *ifn, uint32_t ifn_index)
182{
183 struct sctp_ifn *sctp_ifnp;
184 struct sctp_ifnlist *hash_ifn_head;
185
186 /*
187 * We assume the lock is held for the addresses if thats wrong
188 * problems could occur :-)
189 */
190 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
191 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
192 if (sctp_ifnp->ifn_index == ifn_index) {
193 return (sctp_ifnp);
194 }
195 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
196 return (sctp_ifnp);
197 }
198 }
199 return (NULL);
200}
201
202
203
204struct sctp_vrf *
205sctp_find_vrf(uint32_t vrf_id)
206{
207 struct sctp_vrflist *bucket;
208 struct sctp_vrf *liste;
209
210 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
211 LIST_FOREACH(liste, bucket, next_vrf) {
212 if (vrf_id == liste->vrf_id) {
213 return (liste);
214 }
215 }
216 return (NULL);
217}
218
219void
220sctp_free_vrf(struct sctp_vrf *vrf)
221{
222 int ret;
223
224 ret = atomic_fetchadd_int(&vrf->refcount, -1);
225 if (ret == 1) {
226 /* We zero'd the count */
227 LIST_REMOVE(vrf, next_vrf);
228 SCTP_FREE(vrf, SCTP_M_VRF);
229 atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1);
230 }
231}
232
233void
234sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
235{
236 int ret;
237
238 ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1);
239 if (ret == 1) {
240 /* We zero'd the count */
241 if (sctp_ifnp->vrf) {
242 sctp_free_vrf(sctp_ifnp->vrf);
243 }
244 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
245 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1);
246 }
247}
248
249void
250sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
251{
252 struct sctp_ifn *sctp_ifnp;
253
254 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
255 if (sctp_ifnp != NULL) {
256 sctp_ifnp->ifn_mtu = mtu;
257 }
258}
259
260
261void
262sctp_free_ifa(struct sctp_ifa *sctp_ifap)
263{
264 int ret;
265
266 ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
267 if (ret == 1) {
268 /* We zero'd the count */
269 if (sctp_ifap->ifn_p) {
270 sctp_free_ifn(sctp_ifap->ifn_p);
271 }
272 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
273 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1);
274 }
275}
276
277static void
278sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
279{
280 struct sctp_ifn *found;
281
282 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
283 if (found == NULL) {
284 /* Not in the list.. sorry */
285 return;
286 }
287 if (hold_addr_lock == 0)
288 SCTP_IPI_ADDR_LOCK();
289 LIST_REMOVE(sctp_ifnp, next_bucket);
290 LIST_REMOVE(sctp_ifnp, next_ifn);
291 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
292 sctp_ifnp->registered_af);
293 if (hold_addr_lock == 0)
294 SCTP_IPI_ADDR_UNLOCK();
295 /* Take away the reference, and possibly free it */
296 sctp_free_ifn(sctp_ifnp);
297}
298
299
300struct sctp_ifa *
301sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
302 uint32_t ifn_type, const char *if_name,
303 void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
304 int dynamic_add)
305{
306 struct sctp_vrf *vrf;
307 struct sctp_ifn *sctp_ifnp = NULL;
308 struct sctp_ifa *sctp_ifap = NULL;
309 struct sctp_ifalist *hash_addr_head;
310 struct sctp_ifnlist *hash_ifn_head;
311 uint32_t hash_of_addr;
312 int new_ifn_af = 0;
313
314 /* How granular do we need the locks to be here? */
315 SCTP_IPI_ADDR_LOCK();
316 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
317 if (sctp_ifnp) {
318 vrf = sctp_ifnp->vrf;
319 } else {
320 vrf = sctp_find_vrf(vrf_id);
321 if (vrf == NULL) {
322 vrf = sctp_allocate_vrf(vrf_id);
323 if (vrf == NULL) {
324 SCTP_IPI_ADDR_UNLOCK();
325 return (NULL);
326 }
327 }
328 }
329 if (sctp_ifnp == NULL) {
330 /*
331 * build one and add it, can't hold lock until after malloc
332 * done though.
333 */
334 SCTP_IPI_ADDR_UNLOCK();
335 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN);
336 if (sctp_ifnp == NULL) {
337#ifdef INVARIANTS
338 panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
339#endif
340 return (NULL);
341 }
342 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
343 sctp_ifnp->ifn_index = ifn_index;
344 sctp_ifnp->ifn_p = ifn;
345 sctp_ifnp->ifn_type = ifn_type;
346 sctp_ifnp->refcount = 1;
347 sctp_ifnp->vrf = vrf;
348
349 atomic_add_int(&vrf->refcount, 1);
350 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
351 if (if_name != NULL) {
352 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
353 } else {
354 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
355 }
356 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
357 LIST_INIT(&sctp_ifnp->ifalist);
358 SCTP_IPI_ADDR_LOCK();
359 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
360 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
361 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1);
362 new_ifn_af = 1;
363 }
364 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
365 if (sctp_ifap) {
366 /* Hmm, it already exists? */
367 if ((sctp_ifap->ifn_p) &&
368 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
369 if (new_ifn_af) {
370 /* Remove the created one that we don't want */
371 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
372 }
373 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
374 /* easy to solve, just switch back to active */
375 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
376 sctp_ifap->ifn_p = sctp_ifnp;
377 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
378 exit_stage_left:
379 SCTP_IPI_ADDR_UNLOCK();
380 return (sctp_ifap);
381 } else {
382 goto exit_stage_left;
383 }
384 } else {
385 if (sctp_ifap->ifn_p) {
386 /*
387 * The first IFN gets the address,
388 * duplicates are ignored.
389 */
390 if (new_ifn_af) {
391 /*
392 * Remove the created one that we
393 * don't want
394 */
395 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
396 }
397 goto exit_stage_left;
398 } else {
399 /* repair ifnp which was NULL ? */
400 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
401 sctp_ifap->ifn_p = sctp_ifnp;
402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
403 }
404 goto exit_stage_left;
405 }
406 }
407 SCTP_IPI_ADDR_UNLOCK();
408 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
409 if (sctp_ifap == NULL) {
410#ifdef INVARIANTS
411 panic("No memory for IFA");
412#endif
413 return (NULL);
414 }
415 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
416 sctp_ifap->ifn_p = sctp_ifnp;
417 atomic_add_int(&sctp_ifnp->refcount, 1);
418 sctp_ifap->vrf_id = vrf_id;
419 sctp_ifap->ifa = ifa;
420 memcpy(&sctp_ifap->address, addr, addr->sa_len);
421 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
422 sctp_ifap->flags = ifa_flags;
423 /* Set scope */
424 if (sctp_ifap->address.sa.sa_family == AF_INET) {
425 struct sockaddr_in *sin;
426
427 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
428 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
429 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
430 sctp_ifap->src_is_loop = 1;
431 }
432 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
433 sctp_ifap->src_is_priv = 1;
434 }
435 sctp_ifnp->num_v4++;
436 if (new_ifn_af)
437 new_ifn_af = AF_INET;
438 } else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
439 /* ok to use deprecated addresses? */
440 struct sockaddr_in6 *sin6;
441
442 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
443 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
444 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
445 sctp_ifap->src_is_loop = 1;
446 }
447 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
448 sctp_ifap->src_is_priv = 1;
449 }
450 sctp_ifnp->num_v6++;
451 if (new_ifn_af)
452 new_ifn_af = AF_INET6;
453 } else {
454 new_ifn_af = 0;
455 }
456 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
457
458 if ((sctp_ifap->src_is_priv == 0) &&
459 (sctp_ifap->src_is_loop == 0)) {
460 sctp_ifap->src_is_glob = 1;
461 }
462 SCTP_IPI_ADDR_LOCK();
463 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
464 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
465 sctp_ifap->refcount = 1;
466 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
467 sctp_ifnp->ifa_count++;
468 vrf->total_ifa_count++;
469 atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1);
470 if (new_ifn_af) {
471 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
472 sctp_ifnp->registered_af = new_ifn_af;
473 }
474 SCTP_IPI_ADDR_UNLOCK();
475 if (dynamic_add) {
476 /*
477 * Bump up the refcount so that when the timer completes it
478 * will drop back down.
479 */
480 struct sctp_laddr *wi;
481
482 atomic_add_int(&sctp_ifap->refcount, 1);
483 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
484 if (wi == NULL) {
485 /*
486 * Gak, what can we do? We have lost an address
487 * change can you say HOSED?
488 */
489 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
490 /* Opps, must decrement the count */
491 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index);
492 return (NULL);
493 }
494 SCTP_INCR_LADDR_COUNT();
495 bzero(wi, sizeof(*wi));
496 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
497 wi->ifa = sctp_ifap;
498 wi->action = SCTP_ADD_IP_ADDRESS;
499 SCTP_IPI_ITERATOR_WQ_LOCK();
500 /*
501 * Should this really be a tailq? As it is we will process
502 * the newest first :-0
503 */
504 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
505 SCTP_IPI_ITERATOR_WQ_UNLOCK();
506 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
507 (struct sctp_inpcb *)NULL,
508 (struct sctp_tcb *)NULL,
509 (struct sctp_nets *)NULL);
510 } else {
511 /* it's ready for use */
512 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
513 }
514 return (sctp_ifap);
515}
516
517void
518sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
519 uint32_t ifn_index)
520{
521 struct sctp_vrf *vrf;
522 struct sctp_ifa *sctp_ifap = NULL;
523
524 SCTP_IPI_ADDR_LOCK();
525
526 vrf = sctp_find_vrf(vrf_id);
527 if (vrf == NULL) {
528 SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id);
529 goto out_now;
530 }
531 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
532 if (sctp_ifap) {
533 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
534 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
535 vrf->total_ifa_count--;
536 LIST_REMOVE(sctp_ifap, next_bucket);
537 LIST_REMOVE(sctp_ifap, next_ifa);
538 if (sctp_ifap->ifn_p) {
539 sctp_ifap->ifn_p->ifa_count--;
540 if (sctp_ifap->address.sa.sa_family == AF_INET6)
541 sctp_ifap->ifn_p->num_v6--;
542 else if (sctp_ifap->address.sa.sa_family == AF_INET)
543 sctp_ifap->ifn_p->num_v4--;
544 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
545 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
546 } else {
547 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
548 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
549 SCTP_DEREGISTER_INTERFACE(ifn_index,
550 AF_INET6);
551 SCTP_REGISTER_INTERFACE(ifn_index,
552 AF_INET);
553 sctp_ifap->ifn_p->registered_af = AF_INET;
554 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
555 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
556 SCTP_DEREGISTER_INTERFACE(ifn_index,
557 AF_INET);
558 SCTP_REGISTER_INTERFACE(ifn_index,
559 AF_INET6);
560 sctp_ifap->ifn_p->registered_af = AF_INET6;
561 }
562 }
563 sctp_free_ifn(sctp_ifap->ifn_p);
564 sctp_ifap->ifn_p = NULL;
565 }
566 }
567#ifdef SCTP_DEBUG
568 else {
569 SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:",
570 ifn_index);
571 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
572 }
573#endif
574
575out_now:
576 SCTP_IPI_ADDR_UNLOCK();
577 if (sctp_ifap) {
578 struct sctp_laddr *wi;
579
580 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
581 if (wi == NULL) {
582 /*
583 * Gak, what can we do? We have lost an address
584 * change can you say HOSED?
585 */
586 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
587
588 /* Opps, must decrement the count */
589 sctp_free_ifa(sctp_ifap);
590 return;
591 }
592 SCTP_INCR_LADDR_COUNT();
593 bzero(wi, sizeof(*wi));
594 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
595 wi->ifa = sctp_ifap;
596 wi->action = SCTP_DEL_IP_ADDRESS;
597 SCTP_IPI_ITERATOR_WQ_LOCK();
598 /*
599 * Should this really be a tailq? As it is we will process
600 * the newest first :-0
601 */
602 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
603 SCTP_IPI_ITERATOR_WQ_UNLOCK();
604
605 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
606 (struct sctp_inpcb *)NULL,
607 (struct sctp_tcb *)NULL,
608 (struct sctp_nets *)NULL);
609 }
610 return;
611}
612
613
614
615static struct sctp_tcb *
616sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
617 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
618{
619 /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
620 /*
621 * If we support the TCP model, then we must now dig through to see
622 * if we can find our endpoint in the list of tcp ep's.
623 */
624 uint16_t lport, rport;
625 struct sctppcbhead *ephead;
626 struct sctp_inpcb *inp;
627 struct sctp_laddr *laddr;
628 struct sctp_tcb *stcb;
629 struct sctp_nets *net;
630
631 if ((to == NULL) || (from == NULL)) {
632 return (NULL);
633 }
634 if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
635 lport = ((struct sockaddr_in *)to)->sin_port;
636 rport = ((struct sockaddr_in *)from)->sin_port;
637 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
638 lport = ((struct sockaddr_in6 *)to)->sin6_port;
639 rport = ((struct sockaddr_in6 *)from)->sin6_port;
640 } else {
641 return NULL;
642 }
643 ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
644 (lport + rport), sctppcbinfo.hashtcpmark)];
645 /*
646 * Ok now for each of the guys in this bucket we must look and see:
647 * - Does the remote port match. - Does there single association's
648 * addresses match this address (to). If so we update p_ep to point
649 * to this ep and return the tcb from it.
650 */
651 LIST_FOREACH(inp, ephead, sctp_hash) {
652 SCTP_INP_RLOCK(inp);
653 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
654 SCTP_INP_RUNLOCK(inp);
655 continue;
656 }
657 if (lport != inp->sctp_lport) {
658 SCTP_INP_RUNLOCK(inp);
659 continue;
660 }
661 if (inp->def_vrf_id != vrf_id) {
662 SCTP_INP_RUNLOCK(inp);
663 continue;
664 }
665 /* check to see if the ep has one of the addresses */
666 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
667 /* We are NOT bound all, so look further */
668 int match = 0;
669
670 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
671
672 if (laddr->ifa == NULL) {
673 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
674 continue;
675 }
676 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
677 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
678 continue;
679 }
680 if (laddr->ifa->address.sa.sa_family ==
681 to->sa_family) {
682 /* see if it matches */
683 struct sockaddr_in *intf_addr, *sin;
684
685 intf_addr = &laddr->ifa->address.sin;
686 sin = (struct sockaddr_in *)to;
687 if (from->sa_family == AF_INET) {
688 if (sin->sin_addr.s_addr ==
689 intf_addr->sin_addr.s_addr) {
690 match = 1;
691 break;
692 }
693 } else {
694 struct sockaddr_in6 *intf_addr6;
695 struct sockaddr_in6 *sin6;
696
697 sin6 = (struct sockaddr_in6 *)
698 to;
699 intf_addr6 = &laddr->ifa->address.sin6;
700
701 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
702 &intf_addr6->sin6_addr)) {
703 match = 1;
704 break;
705 }
706 }
707 }
708 }
709 if (match == 0) {
710 /* This endpoint does not have this address */
711 SCTP_INP_RUNLOCK(inp);
712 continue;
713 }
714 }
715 /*
716 * Ok if we hit here the ep has the address, does it hold
717 * the tcb?
718 */
719
720 stcb = LIST_FIRST(&inp->sctp_asoc_list);
721 if (stcb == NULL) {
722 SCTP_INP_RUNLOCK(inp);
723 continue;
724 }
725 SCTP_TCB_LOCK(stcb);
726 if (stcb->rport != rport) {
727 /* remote port does not match. */
728 SCTP_TCB_UNLOCK(stcb);
729 SCTP_INP_RUNLOCK(inp);
730 continue;
731 }
732 /* Does this TCB have a matching address? */
733 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
734
735 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
736 /* not the same family, can't be a match */
737 continue;
738 }
739 if (from->sa_family == AF_INET) {
740 struct sockaddr_in *sin, *rsin;
741
742 sin = (struct sockaddr_in *)&net->ro._l_addr;
743 rsin = (struct sockaddr_in *)from;
744 if (sin->sin_addr.s_addr ==
745 rsin->sin_addr.s_addr) {
746 /* found it */
747 if (netp != NULL) {
748 *netp = net;
749 }
750 /* Update the endpoint pointer */
751 *inp_p = inp;
752 SCTP_INP_RUNLOCK(inp);
753 return (stcb);
754 }
755 } else {
756 struct sockaddr_in6 *sin6, *rsin6;
757
758 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
759 rsin6 = (struct sockaddr_in6 *)from;
760 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
761 &rsin6->sin6_addr)) {
762 /* found it */
763 if (netp != NULL) {
764 *netp = net;
765 }
766 /* Update the endpoint pointer */
767 *inp_p = inp;
768 SCTP_INP_RUNLOCK(inp);
769 return (stcb);
770 }
771 }
772 }
773 SCTP_TCB_UNLOCK(stcb);
774 SCTP_INP_RUNLOCK(inp);
775 }
776 return (NULL);
777}
778
779/*
780 * rules for use
781 *
782 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
783 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
784 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
785 * NULL.
786 */
787
788struct sctp_tcb *
789sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
790 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
791{
792 struct sctpasochead *head;
793 struct sctp_inpcb *inp;
794 struct sctp_tcb *stcb = NULL;
795 struct sctp_nets *net;
796 uint16_t rport;
797
798 inp = *inp_p;
799 if (remote->sa_family == AF_INET) {
800 rport = (((struct sockaddr_in *)remote)->sin_port);
801 } else if (remote->sa_family == AF_INET6) {
802 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
803 } else {
804 return (NULL);
805 }
806 if (locked_tcb) {
807 /*
808 * UN-lock so we can do proper locking here this occurs when
809 * called from load_addresses_from_init.
810 */
811 SCTP_TCB_UNLOCK(locked_tcb);
812 }
813 SCTP_INP_INFO_RLOCK();
814 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
815 /*-
816 * Now either this guy is our listener or it's the
817 * connector. If it is the one that issued the connect, then
818 * it's only chance is to be the first TCB in the list. If
819 * it is the acceptor, then do the special_lookup to hash
820 * and find the real inp.
821 */
822 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
823 /* to is peer addr, from is my addr */
824 stcb = sctp_tcb_special_locate(inp_p, remote, local,
825 netp, inp->def_vrf_id);
826 if ((stcb != NULL) && (locked_tcb == NULL)) {
827 /* we have a locked tcb, lower refcount */
828 SCTP_INP_WLOCK(inp);
829 SCTP_INP_DECR_REF(inp);
830 SCTP_INP_WUNLOCK(inp);
831 }
832 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
833 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
834 SCTP_TCB_LOCK(locked_tcb);
835 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
836 }
837 SCTP_INP_INFO_RUNLOCK();
838 return (stcb);
839 } else {
840 SCTP_INP_WLOCK(inp);
841 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
842 goto null_return;
843 }
844 stcb = LIST_FIRST(&inp->sctp_asoc_list);
845 if (stcb == NULL) {
846 goto null_return;
847 }
848 SCTP_TCB_LOCK(stcb);
849 if (stcb->rport != rport) {
850 /* remote port does not match. */
851 SCTP_TCB_UNLOCK(stcb);
852 goto null_return;
853 }
854 /* now look at the list of remote addresses */
855 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
856#ifdef INVARIANTS
857 if (net == (TAILQ_NEXT(net, sctp_next))) {
858 panic("Corrupt net list");
859 }
860#endif
861 if (net->ro._l_addr.sa.sa_family !=
862 remote->sa_family) {
863 /* not the same family */
864 continue;
865 }
866 if (remote->sa_family == AF_INET) {
867 struct sockaddr_in *sin, *rsin;
868
869 sin = (struct sockaddr_in *)
870 &net->ro._l_addr;
871 rsin = (struct sockaddr_in *)remote;
872 if (sin->sin_addr.s_addr ==
873 rsin->sin_addr.s_addr) {
874 /* found it */
875 if (netp != NULL) {
876 *netp = net;
877 }
878 if (locked_tcb == NULL) {
879 SCTP_INP_DECR_REF(inp);
880 } else if (locked_tcb != stcb) {
881 SCTP_TCB_LOCK(locked_tcb);
882 }
883 SCTP_INP_WUNLOCK(inp);
884 SCTP_INP_INFO_RUNLOCK();
885 return (stcb);
886 }
887 } else if (remote->sa_family == AF_INET6) {
888 struct sockaddr_in6 *sin6, *rsin6;
889
890 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
891 rsin6 = (struct sockaddr_in6 *)remote;
892 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
893 &rsin6->sin6_addr)) {
894 /* found it */
895 if (netp != NULL) {
896 *netp = net;
897 }
898 if (locked_tcb == NULL) {
899 SCTP_INP_DECR_REF(inp);
900 } else if (locked_tcb != stcb) {
901 SCTP_TCB_LOCK(locked_tcb);
902 }
903 SCTP_INP_WUNLOCK(inp);
904 SCTP_INP_INFO_RUNLOCK();
905 return (stcb);
906 }
907 }
908 }
909 SCTP_TCB_UNLOCK(stcb);
910 }
911 } else {
912 SCTP_INP_WLOCK(inp);
913 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
914 goto null_return;
915 }
916 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
917 inp->sctp_hashmark)];
918 if (head == NULL) {
919 goto null_return;
920 }
921 LIST_FOREACH(stcb, head, sctp_tcbhash) {
922 if (stcb->rport != rport) {
923 /* remote port does not match */
924 continue;
925 }
926 /* now look at the list of remote addresses */
927 SCTP_TCB_LOCK(stcb);
928 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
929#ifdef INVARIANTS
930 if (net == (TAILQ_NEXT(net, sctp_next))) {
931 panic("Corrupt net list");
932 }
933#endif
934 if (net->ro._l_addr.sa.sa_family !=
935 remote->sa_family) {
936 /* not the same family */
937 continue;
938 }
939 if (remote->sa_family == AF_INET) {
940 struct sockaddr_in *sin, *rsin;
941
942 sin = (struct sockaddr_in *)
943 &net->ro._l_addr;
944 rsin = (struct sockaddr_in *)remote;
945 if (sin->sin_addr.s_addr ==
946 rsin->sin_addr.s_addr) {
947 /* found it */
948 if (netp != NULL) {
949 *netp = net;
950 }
951 if (locked_tcb == NULL) {
952 SCTP_INP_DECR_REF(inp);
953 } else if (locked_tcb != stcb) {
954 SCTP_TCB_LOCK(locked_tcb);
955 }
956 SCTP_INP_WUNLOCK(inp);
957 SCTP_INP_INFO_RUNLOCK();
958 return (stcb);
959 }
960 } else if (remote->sa_family == AF_INET6) {
961 struct sockaddr_in6 *sin6, *rsin6;
962
963 sin6 = (struct sockaddr_in6 *)
964 &net->ro._l_addr;
965 rsin6 = (struct sockaddr_in6 *)remote;
966 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
967 &rsin6->sin6_addr)) {
968 /* found it */
969 if (netp != NULL) {
970 *netp = net;
971 }
972 if (locked_tcb == NULL) {
973 SCTP_INP_DECR_REF(inp);
974 } else if (locked_tcb != stcb) {
975 SCTP_TCB_LOCK(locked_tcb);
976 }
977 SCTP_INP_WUNLOCK(inp);
978 SCTP_INP_INFO_RUNLOCK();
979 return (stcb);
980 }
981 }
982 }
983 SCTP_TCB_UNLOCK(stcb);
984 }
985 }
986null_return:
987 /* clean up for returning null */
988 if (locked_tcb) {
989 SCTP_TCB_LOCK(locked_tcb);
990 }
991 SCTP_INP_WUNLOCK(inp);
992 SCTP_INP_INFO_RUNLOCK();
993 /* not found */
994 return (NULL);
995}
996
997/*
998 * Find an association for a specific endpoint using the association id given
999 * out in the COMM_UP notification
1000 */
1001
1002struct sctp_tcb *
1003sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1004{
1005 /*
1006 * Use my the assoc_id to find a endpoint
1007 */
1008 struct sctpasochead *head;
1009 struct sctp_tcb *stcb;
1010 uint32_t id;
1011
1012 if (asoc_id == 0 || inp == NULL) {
1013 return (NULL);
1014 }
1015 SCTP_INP_INFO_RLOCK();
1016 id = (uint32_t) asoc_id;
1017 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
1018 sctppcbinfo.hashasocmark)];
1019 if (head == NULL) {
1020 /* invalid id TSNH */
1021 SCTP_INP_INFO_RUNLOCK();
1022 return (NULL);
1023 }
1024 LIST_FOREACH(stcb, head, sctp_asocs) {
1025 SCTP_INP_RLOCK(stcb->sctp_ep);
1026 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1027 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1028 SCTP_INP_INFO_RUNLOCK();
1029 return (NULL);
1030 }
1031 if (stcb->asoc.assoc_id == id) {
1032 /* candidate */
1033 if (inp != stcb->sctp_ep) {
1034 /*
1035 * some other guy has the same id active (id
1036 * collision ??).
1037 */
1038 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1039 continue;
1040 }
1041 if (want_lock) {
1042 SCTP_TCB_LOCK(stcb);
1043 }
1044 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1045 SCTP_INP_INFO_RUNLOCK();
1046 return (stcb);
1047 }
1048 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1049 }
1050 /* Ok if we missed here, lets try the restart hash */
1051 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
1052 if (head == NULL) {
1053 /* invalid id TSNH */
1054 SCTP_INP_INFO_RUNLOCK();
1055 return (NULL);
1056 }
1057 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
1058 SCTP_INP_RLOCK(stcb->sctp_ep);
1059 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1060 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1061 continue;
1062 }
1063 if (want_lock) {
1064 SCTP_TCB_LOCK(stcb);
1065 }
1066 if (stcb->asoc.assoc_id == id) {
1067 /* candidate */
1068 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1069 if (inp != stcb->sctp_ep) {
1070 /*
1071 * some other guy has the same id active (id
1072 * collision ??).
1073 */
1074 if (want_lock) {
1075 SCTP_TCB_UNLOCK(stcb);
1076 }
1077 continue;
1078 }
1079 SCTP_INP_INFO_RUNLOCK();
1080 return (stcb);
1081 } else {
1082 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1083 }
1084 if (want_lock) {
1085 SCTP_TCB_UNLOCK(stcb);
1086 }
1087 }
1088 SCTP_INP_INFO_RUNLOCK();
1089 return (NULL);
1090}
1091
1092
1093static struct sctp_inpcb *
1094sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1095 uint16_t lport, uint32_t vrf_id)
1096{
1097 struct sctp_inpcb *inp;
1098 struct sockaddr_in *sin;
1099 struct sockaddr_in6 *sin6;
1100 struct sctp_laddr *laddr;
1101 int fnd;
1102
1103 /*
1104 * Endpoing probe expects that the INP_INFO is locked.
1105 */
1106 if (nam->sa_family == AF_INET) {
1107 sin = (struct sockaddr_in *)nam;
1108 sin6 = NULL;
1109 } else if (nam->sa_family == AF_INET6) {
1110 sin6 = (struct sockaddr_in6 *)nam;
1111 sin = NULL;
1112 } else {
1113 /* unsupported family */
1114 return (NULL);
1115 }
1116 if (head == NULL)
1117 return (NULL);
1118 LIST_FOREACH(inp, head, sctp_hash) {
1119 SCTP_INP_RLOCK(inp);
1120 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1121 SCTP_INP_RUNLOCK(inp);
1122 continue;
1123 }
1124 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1125 (inp->sctp_lport == lport)) {
1126 /* got it */
1127 if ((nam->sa_family == AF_INET) &&
1128 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1129 SCTP_IPV6_V6ONLY(inp)) {
1130 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1131 SCTP_INP_RUNLOCK(inp);
1132 continue;
1133 }
1134 /* A V6 address and the endpoint is NOT bound V6 */
1135 if (nam->sa_family == AF_INET6 &&
1136 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1137 SCTP_INP_RUNLOCK(inp);
1138 continue;
1139 }
1140 /* does a VRF id match? */
1141 fnd = 0;
1142 if (inp->def_vrf_id == vrf_id)
1143 fnd = 1;
1144
1145 SCTP_INP_RUNLOCK(inp);
1146 if (!fnd)
1147 continue;
1148 return (inp);
1149 }
1150 SCTP_INP_RUNLOCK(inp);
1151 }
1152
1153 if ((nam->sa_family == AF_INET) &&
1154 (sin->sin_addr.s_addr == INADDR_ANY)) {
1155 /* Can't hunt for one that has no address specified */
1156 return (NULL);
1157 } else if ((nam->sa_family == AF_INET6) &&
1158 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1159 /* Can't hunt for one that has no address specified */
1160 return (NULL);
1161 }
1162 /*
1163 * ok, not bound to all so see if we can find a EP bound to this
1164 * address.
1165 */
1166 LIST_FOREACH(inp, head, sctp_hash) {
1167 SCTP_INP_RLOCK(inp);
1168 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1169 SCTP_INP_RUNLOCK(inp);
1170 continue;
1171 }
1172 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1173 SCTP_INP_RUNLOCK(inp);
1174 continue;
1175 }
1176 /*
1177 * Ok this could be a likely candidate, look at all of its
1178 * addresses
1179 */
1180 if (inp->sctp_lport != lport) {
1181 SCTP_INP_RUNLOCK(inp);
1182 continue;
1183 }
1184 /* does a VRF id match? */
1185 fnd = 0;
1186 if (inp->def_vrf_id == vrf_id)
1187 fnd = 1;
1188
1189 if (!fnd) {
1190 SCTP_INP_RUNLOCK(inp);
1191 continue;
1192 }
1193 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1194 if (laddr->ifa == NULL) {
1195 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1196 __FUNCTION__);
1197 continue;
1198 }
1199 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1200 laddr->ifa);
1201 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1202 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1203 continue;
1204 }
1205 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1206 /* possible, see if it matches */
1207 struct sockaddr_in *intf_addr;
1208
1209 intf_addr = &laddr->ifa->address.sin;
1210 if (nam->sa_family == AF_INET) {
1211 if (sin->sin_addr.s_addr ==
1212 intf_addr->sin_addr.s_addr) {
1213 SCTP_INP_RUNLOCK(inp);
1214 return (inp);
1215 }
1216 } else if (nam->sa_family == AF_INET6) {
1217 struct sockaddr_in6 *intf_addr6;
1218
1219 intf_addr6 = &laddr->ifa->address.sin6;
1220 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1221 &intf_addr6->sin6_addr)) {
1222 SCTP_INP_RUNLOCK(inp);
1223 return (inp);
1224 }
1225 }
1226 }
1227 }
1228 SCTP_INP_RUNLOCK(inp);
1229 }
1230 return (NULL);
1231}
1232
1233
1234struct sctp_inpcb *
1235sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1236 uint32_t vrf_id)
1237{
1238 /*
1239 * First we check the hash table to see if someone has this port
1240 * bound with just the port.
1241 */
1242 struct sctp_inpcb *inp;
1243 struct sctppcbhead *head;
1244 struct sockaddr_in *sin;
1245 struct sockaddr_in6 *sin6;
1246 int lport;
1247
1248 if (nam->sa_family == AF_INET) {
1249 sin = (struct sockaddr_in *)nam;
1250 lport = ((struct sockaddr_in *)nam)->sin_port;
1251 } else if (nam->sa_family == AF_INET6) {
1252 sin6 = (struct sockaddr_in6 *)nam;
1253 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1254 } else {
1255 /* unsupported family */
1256 return (NULL);
1257 }
1258 /*
1259 * I could cheat here and just cast to one of the types but we will
1260 * do it right. It also provides the check against an Unsupported
1261 * type too.
1262 */
1263 /* Find the head of the ALLADDR chain */
1264 if (have_lock == 0) {
1265 SCTP_INP_INFO_RLOCK();
1266
1267 }
1268 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1269 sctppcbinfo.hashmark)];
1270 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1271
1272 /*
1273 * If the TCP model exists it could be that the main listening
1274 * endpoint is gone but there exists a connected socket for this guy
1275 * yet. If so we can return the first one that we find. This may NOT
1276 * be the correct one but the sctp_findassociation_ep_addr has
1277 * further code to look at all TCP models.
1278 */
1279 if (inp == NULL && find_tcp_pool) {
1280 unsigned int i;
1281
1282 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1283 /*
1284 * This is real gross, but we do NOT have a remote
1285 * port at this point depending on who is calling.
1286 * We must therefore look for ANY one that matches
1287 * our local port :/
1288 */
1289 head = &sctppcbinfo.sctp_tcpephash[i];
1290 if (LIST_FIRST(head)) {
1291 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1292 if (inp) {
1293 /* Found one */
1294 break;
1295 }
1296 }
1297 }
1298 }
1299 if (inp) {
1300 SCTP_INP_INCR_REF(inp);
1301 }
1302 if (have_lock == 0) {
1303 SCTP_INP_INFO_RUNLOCK();
1304 }
1305 return (inp);
1306}
1307
1308/*
1309 * Find an association for an endpoint with the pointer to whom you want to
1310 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1311 * need to change the *to to some other struct like a mbuf...
1312 */
1313struct sctp_tcb *
1314sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1316 uint32_t vrf_id)
1317{
1318 struct sctp_inpcb *inp = NULL;
1319 struct sctp_tcb *retval;
1320
1321 SCTP_INP_INFO_RLOCK();
1322 if (find_tcp_pool) {
1323 if (inp_p != NULL) {
1324 retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1325 vrf_id);
1326 } else {
1327 retval = sctp_tcb_special_locate(&inp, from, to, netp,
1328 vrf_id);
1329 }
1330 if (retval != NULL) {
1331 SCTP_INP_INFO_RUNLOCK();
1332 return (retval);
1333 }
1334 }
1335 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1336 if (inp_p != NULL) {
1337 *inp_p = inp;
1338 }
1339 SCTP_INP_INFO_RUNLOCK();
1340
1341 if (inp == NULL) {
1342 return (NULL);
1343 }
1344 /*
1345 * ok, we have an endpoint, now lets find the assoc for it (if any)
1346 * we now place the source address or from in the to of the find
1347 * endpoint call. Since in reality this chain is used from the
1348 * inbound packet side.
1349 */
1350 if (inp_p != NULL) {
1351 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1352 NULL);
1353 } else {
1354 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1355 NULL);
1356 }
1357 return retval;
1358}
1359
1360
1361/*
1362 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1363 * find all addresses that the sender has specified in any address list. Each
1364 * address will be used to lookup the TCB and see if one exits.
1365 */
1366static struct sctp_tcb *
1367sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1368 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1369 struct sockaddr *dest)
1370{
1371 struct sockaddr_in sin4;
1372 struct sockaddr_in6 sin6;
1373 struct sctp_paramhdr *phdr, parm_buf;
1374 struct sctp_tcb *retval;
1375 uint32_t ptype, plen;
1376
1377 memset(&sin4, 0, sizeof(sin4));
1378 memset(&sin6, 0, sizeof(sin6));
1379 sin4.sin_len = sizeof(sin4);
1380 sin4.sin_family = AF_INET;
1381 sin4.sin_port = sh->src_port;
1382 sin6.sin6_len = sizeof(sin6);
1383 sin6.sin6_family = AF_INET6;
1384 sin6.sin6_port = sh->src_port;
1385
1386 retval = NULL;
1387 offset += sizeof(struct sctp_init_chunk);
1388
1389 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1390 while (phdr != NULL) {
1391 /* now we must see if we want the parameter */
1392 ptype = ntohs(phdr->param_type);
1393 plen = ntohs(phdr->param_length);
1394 if (plen == 0) {
1395 break;
1396 }
1397 if (ptype == SCTP_IPV4_ADDRESS &&
1398 plen == sizeof(struct sctp_ipv4addr_param)) {
1399 /* Get the rest of the address */
1400 struct sctp_ipv4addr_param ip4_parm, *p4;
1401
1402 phdr = sctp_get_next_param(m, offset,
1403 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1404 if (phdr == NULL) {
1405 return (NULL);
1406 }
1407 p4 = (struct sctp_ipv4addr_param *)phdr;
1408 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1409 /* look it up */
1410 retval = sctp_findassociation_ep_addr(inp_p,
1411 (struct sockaddr *)&sin4, netp, dest, NULL);
1412 if (retval != NULL) {
1413 return (retval);
1414 }
1415 } else if (ptype == SCTP_IPV6_ADDRESS &&
1416 plen == sizeof(struct sctp_ipv6addr_param)) {
1417 /* Get the rest of the address */
1418 struct sctp_ipv6addr_param ip6_parm, *p6;
1419
1420 phdr = sctp_get_next_param(m, offset,
1421 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1422 if (phdr == NULL) {
1423 return (NULL);
1424 }
1425 p6 = (struct sctp_ipv6addr_param *)phdr;
1426 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1427 /* look it up */
1428 retval = sctp_findassociation_ep_addr(inp_p,
1429 (struct sockaddr *)&sin6, netp, dest, NULL);
1430 if (retval != NULL) {
1431 return (retval);
1432 }
1433 }
1434 offset += SCTP_SIZE32(plen);
1435 phdr = sctp_get_next_param(m, offset, &parm_buf,
1436 sizeof(parm_buf));
1437 }
1438 return (NULL);
1439}
1440
1441
1442static struct sctp_tcb *
1443sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1444 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1445 uint16_t lport, int skip_src_check)
1446{
1447 /*
1448 * Use my vtag to hash. If we find it we then verify the source addr
1449 * is in the assoc. If all goes well we save a bit on rec of a
1450 * packet.
1451 */
1452 struct sctpasochead *head;
1453 struct sctp_nets *net;
1454 struct sctp_tcb *stcb;
1455
1456 *netp = NULL;
1457 *inp_p = NULL;
1458 SCTP_INP_INFO_RLOCK();
1459 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1460 sctppcbinfo.hashasocmark)];
1461 if (head == NULL) {
1462 /* invalid vtag */
1463 SCTP_INP_INFO_RUNLOCK();
1464 return (NULL);
1465 }
1466 LIST_FOREACH(stcb, head, sctp_asocs) {
1467 SCTP_INP_RLOCK(stcb->sctp_ep);
1468 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1469 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1470 continue;
1471 }
1472 SCTP_TCB_LOCK(stcb);
1473 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1474 if (stcb->asoc.my_vtag == vtag) {
1475 /* candidate */
1476 if (stcb->rport != rport) {
1477 /*
1478 * we could remove this if vtags are unique
1479 * across the system.
1480 */
1481 SCTP_TCB_UNLOCK(stcb);
1482 continue;
1483 }
1484 if (stcb->sctp_ep->sctp_lport != lport) {
1485 /*
1486 * we could remove this if vtags are unique
1487 * across the system.
1488 */
1489 SCTP_TCB_UNLOCK(stcb);
1490 continue;
1491 }
1492 if (skip_src_check) {
1493 *netp = NULL; /* unknown */
1494 if (inp_p)
1495 *inp_p = stcb->sctp_ep;
1496 SCTP_INP_INFO_RUNLOCK();
1497 return (stcb);
1498 }
1499 net = sctp_findnet(stcb, from);
1500 if (net) {
1501 /* yep its him. */
1502 *netp = net;
1503 SCTP_STAT_INCR(sctps_vtagexpress);
1504 *inp_p = stcb->sctp_ep;
1505 SCTP_INP_INFO_RUNLOCK();
1506 return (stcb);
1507 } else {
1508 /*
1509 * not him, this should only happen in rare
1510 * cases so I peg it.
1511 */
1512 SCTP_STAT_INCR(sctps_vtagbogus);
1513 }
1514 }
1515 SCTP_TCB_UNLOCK(stcb);
1516 }
1517 SCTP_INP_INFO_RUNLOCK();
1518 return (NULL);
1519}
1520
1521/*
1522 * Find an association with the pointer to the inbound IP packet. This can be
1523 * a IPv4 or IPv6 packet.
1524 */
1525struct sctp_tcb *
1526sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1527 struct sctphdr *sh, struct sctp_chunkhdr *ch,
1528 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1529{
1530 int find_tcp_pool;
1531 struct ip *iph;
1532 struct sctp_tcb *retval;
1533 struct sockaddr_storage to_store, from_store;
1534 struct sockaddr *to = (struct sockaddr *)&to_store;
1535 struct sockaddr *from = (struct sockaddr *)&from_store;
1536 struct sctp_inpcb *inp;
1537
1538 iph = mtod(m, struct ip *);
1539 if (iph->ip_v == IPVERSION) {
1540 /* its IPv4 */
1541 struct sockaddr_in *from4;
1542
1543 from4 = (struct sockaddr_in *)&from_store;
1544 bzero(from4, sizeof(*from4));
1545 from4->sin_family = AF_INET;
1546 from4->sin_len = sizeof(struct sockaddr_in);
1547 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1548 from4->sin_port = sh->src_port;
1549 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1550 /* its IPv6 */
1551 struct ip6_hdr *ip6;
1552 struct sockaddr_in6 *from6;
1553
1554 ip6 = mtod(m, struct ip6_hdr *);
1555 from6 = (struct sockaddr_in6 *)&from_store;
1556 bzero(from6, sizeof(*from6));
1557 from6->sin6_family = AF_INET6;
1558 from6->sin6_len = sizeof(struct sockaddr_in6);
1559 from6->sin6_addr = ip6->ip6_src;
1560 from6->sin6_port = sh->src_port;
1561 /* Get the scopes in properly to the sin6 addr's */
1562 /* we probably don't need these operations */
1563 (void)sa6_recoverscope(from6);
1564 sa6_embedscope(from6, ip6_use_defzone);
1565 } else {
1566 /* Currently not supported. */
1567 return (NULL);
1568 }
1569 if (sh->v_tag) {
1570 /* we only go down this path if vtag is non-zero */
1571 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1572 inp_p, netp, sh->src_port, sh->dest_port, 0);
1573 if (retval) {
1574 return (retval);
1575 }
1576 }
1577 if (iph->ip_v == IPVERSION) {
1578 /* its IPv4 */
1579 struct sockaddr_in *to4;
1580
1581 to4 = (struct sockaddr_in *)&to_store;
1582 bzero(to4, sizeof(*to4));
1583 to4->sin_family = AF_INET;
1584 to4->sin_len = sizeof(struct sockaddr_in);
1585 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1586 to4->sin_port = sh->dest_port;
1587 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1588 /* its IPv6 */
1589 struct ip6_hdr *ip6;
1590 struct sockaddr_in6 *to6;
1591
1592 ip6 = mtod(m, struct ip6_hdr *);
1593 to6 = (struct sockaddr_in6 *)&to_store;
1594 bzero(to6, sizeof(*to6));
1595 to6->sin6_family = AF_INET6;
1596 to6->sin6_len = sizeof(struct sockaddr_in6);
1597 to6->sin6_addr = ip6->ip6_dst;
1598 to6->sin6_port = sh->dest_port;
1599 /* Get the scopes in properly to the sin6 addr's */
1600 /* we probably don't need these operations */
1601 (void)sa6_recoverscope(to6);
1602 sa6_embedscope(to6, ip6_use_defzone);
1603 }
1604 find_tcp_pool = 0;
1605 if ((ch->chunk_type != SCTP_INITIATION) &&
1606 (ch->chunk_type != SCTP_INITIATION_ACK) &&
1607 (ch->chunk_type != SCTP_COOKIE_ACK) &&
1608 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1609 /* Other chunk types go to the tcp pool. */
1610 find_tcp_pool = 1;
1611 }
1612 if (inp_p) {
1613 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1614 find_tcp_pool, vrf_id);
1615 inp = *inp_p;
1616 } else {
1617 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1618 find_tcp_pool, vrf_id);
1619 }
1620 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
1621 if (retval == NULL && inp) {
1622 /* Found a EP but not this address */
1623 if ((ch->chunk_type == SCTP_INITIATION) ||
1624 (ch->chunk_type == SCTP_INITIATION_ACK)) {
1625 /*-
1626 * special hook, we do NOT return linp or an
1627 * association that is linked to an existing
1628 * association that is under the TCP pool (i.e. no
1629 * listener exists). The endpoint finding routine
1630 * will always find a listner before examining the
1631 * TCP pool.
1632 */
1633 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1634 if (inp_p) {
1635 *inp_p = NULL;
1636 }
1637 return (NULL);
1638 }
1639 retval = sctp_findassociation_special_addr(m, iphlen,
1640 offset, sh, &inp, netp, to);
1641 if (inp_p != NULL) {
1642 *inp_p = inp;
1643 }
1644 }
1645 }
1646 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
1647 return (retval);
1648}
1649
1650/*
1651 * lookup an association by an ASCONF lookup address.
1652 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1653 */
1654struct sctp_tcb *
1655sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
1656 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1657{
1658 struct sctp_tcb *stcb;
1659 struct sockaddr_in *sin;
1660 struct sockaddr_in6 *sin6;
1661 struct sockaddr_storage local_store, remote_store;
1662 struct ip *iph;
1663 struct sctp_paramhdr parm_buf, *phdr;
1664 int ptype;
1665 int zero_address = 0;
1666
1667
1668 memset(&local_store, 0, sizeof(local_store));
1669 memset(&remote_store, 0, sizeof(remote_store));
1670
1671 /* First get the destination address setup too. */
1672 iph = mtod(m, struct ip *);
1673 if (iph->ip_v == IPVERSION) {
1674 /* its IPv4 */
1675 sin = (struct sockaddr_in *)&local_store;
1676 sin->sin_family = AF_INET;
1677 sin->sin_len = sizeof(*sin);
1678 sin->sin_port = sh->dest_port;
1679 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
1680 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1681 /* its IPv6 */
1682 struct ip6_hdr *ip6;
1683
1684 ip6 = mtod(m, struct ip6_hdr *);
1685 sin6 = (struct sockaddr_in6 *)&local_store;
1686 sin6->sin6_family = AF_INET6;
1687 sin6->sin6_len = sizeof(*sin6);
1688 sin6->sin6_port = sh->dest_port;
1689 sin6->sin6_addr = ip6->ip6_dst;
1690 } else {
1691 return NULL;
1692 }
1693
1694 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
1695 &parm_buf, sizeof(struct sctp_paramhdr));
1696 if (phdr == NULL) {
1697 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
1698 __FUNCTION__);
1699 return NULL;
1700 }
1701 ptype = (int)((uint32_t) ntohs(phdr->param_type));
1702 /* get the correlation address */
1703 if (ptype == SCTP_IPV6_ADDRESS) {
1704 /* ipv6 address param */
1705 struct sctp_ipv6addr_param *p6, p6_buf;
1706
1707 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
1708 return NULL;
1709 }
1710 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
1711 offset + sizeof(struct sctp_asconf_chunk),
1712 &p6_buf.ph, sizeof(*p6));
1713 if (p6 == NULL) {
1714 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
1715 __FUNCTION__);
1716 return (NULL);
1717 }
1718 sin6 = (struct sockaddr_in6 *)&remote_store;
1719 sin6->sin6_family = AF_INET6;
1720 sin6->sin6_len = sizeof(*sin6);
1721 sin6->sin6_port = sh->src_port;
1722 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
1723 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1724 zero_address = 1;
1725 } else if (ptype == SCTP_IPV4_ADDRESS) {
1726 /* ipv4 address param */
1727 struct sctp_ipv4addr_param *p4, p4_buf;
1728
1729 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
1730 return NULL;
1731 }
1732 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
1733 offset + sizeof(struct sctp_asconf_chunk),
1734 &p4_buf.ph, sizeof(*p4));
1735 if (p4 == NULL) {
1736 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
1737 __FUNCTION__);
1738 return (NULL);
1739 }
1740 sin = (struct sockaddr_in *)&remote_store;
1741 sin->sin_family = AF_INET;
1742 sin->sin_len = sizeof(*sin);
1743 sin->sin_port = sh->src_port;
1744 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
1745 if (sin->sin_addr.s_addr == INADDR_ANY)
1746 zero_address = 1;
1747 } else {
1748 /* invalid address param type */
1749 return NULL;
1750 }
1751
1752 if (zero_address) {
1753 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
1754 netp, sh->src_port, sh->dest_port, 1);
1755 /*
1756 * printf("findassociation_ep_asconf: zero lookup address
1757 * finds stcb 0x%x\n", (uint32_t)stcb);
1758 */
1759 } else {
1760 stcb = sctp_findassociation_ep_addr(inp_p,
1761 (struct sockaddr *)&remote_store, netp,
1762 (struct sockaddr *)&local_store, NULL);
1763 }
1764 return (stcb);
1765}
1766
1767
1768/*
1769 * allocate a sctp_inpcb and setup a temporary binding to a port/all
1770 * addresses. This way if we don't get a bind we by default pick a ephemeral
1771 * port with all addresses bound.
1772 */
1773int
1774sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
1775{
1776 /*
1777 * we get called when a new endpoint starts up. We need to allocate
1778 * the sctp_inpcb structure from the zone and init it. Mark it as
1779 * unbound and find a port that we can use as an ephemeral with
1780 * INADDR_ANY. If the user binds later no problem we can then add in
1781 * the specific addresses. And setup the default parameters for the
1782 * EP.
1783 */
1784 int i, error;
1785 struct sctp_inpcb *inp;
1786 struct sctp_pcb *m;
1787 struct timeval time;
1788 sctp_sharedkey_t *null_key;
1789
1790 error = 0;
1791
1792 SCTP_INP_INFO_WLOCK();
1793 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb);
1794 if (inp == NULL) {
1795 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
1796 SCTP_INP_INFO_WUNLOCK();
1797 return (ENOBUFS);
1798 }
1799 /* zap it */
1800 bzero(inp, sizeof(*inp));
1801
1802 /* bump generations */
1803 /* setup socket pointers */
1804 inp->sctp_socket = so;
1805 inp->ip_inp.inp.inp_socket = so;
1806
1807 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
1808 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1809
1810#ifdef FAST_IPSEC
1811 {
1812 struct inpcbpolicy *pcb_sp = NULL;
1813
1814 error = ipsec_init_policy(so, &pcb_sp);
1815 /* Arrange to share the policy */
1816 inp->ip_inp.inp.inp_sp = pcb_sp;
1817 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1818 }
1819 if (error != 0) {
1820 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1821 SCTP_INP_INFO_WUNLOCK();
1822 return error;
1823 }
1824#endif /* FAST_IPSEC */
1825 SCTP_INCR_EP_COUNT();
1826 inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1827 SCTP_INP_INFO_WUNLOCK();
1828
1829 so->so_pcb = (caddr_t)inp;
1830
1831 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
1832 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
1833 /* UDP style socket */
1834 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1835 SCTP_PCB_FLAGS_UNBOUND);
1836 /* Be sure it is NON-BLOCKING IO for UDP */
1837 /* SCTP_SET_SO_NBIO(so); */
1838 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
1839 /* TCP style socket */
1840 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1841 SCTP_PCB_FLAGS_UNBOUND);
1842 /* Be sure we have blocking IO by default */
1843 SCTP_CLEAR_SO_NBIO(so);
1844 } else {
1845 /*
1846 * unsupported socket type (RAW, etc)- in case we missed it
1847 * in protosw
1848 */
1849 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1850 return (EOPNOTSUPP);
1851 }
1852 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
1853
1854 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize,
1855 &inp->sctp_hashmark);
1856 if (inp->sctp_tcbhash == NULL) {
1857 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
1858 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1859 return (ENOBUFS);
1860 }
1861 inp->def_vrf_id = vrf_id;
1862
1863 SCTP_INP_INFO_WLOCK();
1864 SCTP_INP_LOCK_INIT(inp);
1865 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
1866 SCTP_INP_READ_INIT(inp);
1867 SCTP_ASOC_CREATE_LOCK_INIT(inp);
1868 /* lock the new ep */
1869 SCTP_INP_WLOCK(inp);
1870
1871 /* add it to the info area */
1872 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1873 SCTP_INP_INFO_WUNLOCK();
1874
1875 TAILQ_INIT(&inp->read_queue);
1876 LIST_INIT(&inp->sctp_addr_list);
1877
1878 LIST_INIT(&inp->sctp_asoc_list);
1879
1880#ifdef SCTP_TRACK_FREED_ASOCS
1881 /* TEMP CODE */
1882 LIST_INIT(&inp->sctp_asoc_free_list);
1883#endif
1884 /* Init the timer structure for signature change */
1885 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
1886 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1887
1888 /* now init the actual endpoint default data */
1889 m = &inp->sctp_ep;
1890
1891 /* setup the base timeout information */
1892 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
1893 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
1894 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1895 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
1896 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1897 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1898 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1899 /* all max/min max are in ms */
1900 m->sctp_maxrto = sctp_rto_max_default;
1901 m->sctp_minrto = sctp_rto_min_default;
1902 m->initial_rto = sctp_rto_initial_default;
1903 m->initial_init_rto_max = sctp_init_rto_max_default;
1904 m->sctp_sack_freq = sctp_sack_freq_default;
1905
1906 m->max_open_streams_intome = MAX_SCTP_STREAMS;
1907
1908 m->max_init_times = sctp_init_rtx_max_default;
1909 m->max_send_times = sctp_assoc_rtx_max_default;
1910 m->def_net_failure = sctp_path_rtx_max_default;
1911 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1912 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1913 m->max_burst = sctp_max_burst_default;
1914 /* number of streams to pre-open on a association */
1915 m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1916
1917 /* Add adaptation cookie */
1918 m->adaptation_layer_indicator = 0x504C5253;
1919
1920 /* seed random number generator */
1921 m->random_counter = 1;
1922 m->store_at = SCTP_SIGNATURE_SIZE;
1923 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
1924 sctp_fill_random_store(m);
1925
1926 /* Minimum cookie size */
1927 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1928 sizeof(struct sctp_state_cookie);
1929 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1930
1931 /* Setup the initial secret */
1932 (void)SCTP_GETTIME_TIMEVAL(&time);
1933 m->time_of_secret_change = time.tv_sec;
1934
1935 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1936 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1937 }
1938 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1939
1940 /* How long is a cookie good for ? */
1941 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
1942 /*
1943 * Initialize authentication parameters
1944 */
1945 m->local_hmacs = sctp_default_supported_hmaclist();
1946 m->local_auth_chunks = sctp_alloc_chunklist();
1947 sctp_auth_set_default_chunks(m->local_auth_chunks);
1948 LIST_INIT(&m->shared_keys);
1949 /* add default NULL key as key id 0 */
1950 null_key = sctp_alloc_sharedkey();
1951 sctp_insert_sharedkey(&m->shared_keys, null_key);
1952 SCTP_INP_WUNLOCK(inp);
1953#ifdef SCTP_LOG_CLOSING
1954 sctp_log_closing(inp, NULL, 12);
1955#endif
1956 return (error);
1957}
1958
1959
1960void
1961sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1962 struct sctp_tcb *stcb)
1963{
1964 struct sctp_nets *net;
1965 uint16_t lport, rport;
1966 struct sctppcbhead *head;
1967 struct sctp_laddr *laddr, *oladdr;
1968
1969 SCTP_TCB_UNLOCK(stcb);
1970 SCTP_INP_INFO_WLOCK();
1971 SCTP_INP_WLOCK(old_inp);
1972 SCTP_INP_WLOCK(new_inp);
1973 SCTP_TCB_LOCK(stcb);
1974
1975 new_inp->sctp_ep.time_of_secret_change =
1976 old_inp->sctp_ep.time_of_secret_change;
1977 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1978 sizeof(old_inp->sctp_ep.secret_key));
1979 new_inp->sctp_ep.current_secret_number =
1980 old_inp->sctp_ep.current_secret_number;
1981 new_inp->sctp_ep.last_secret_number =
1982 old_inp->sctp_ep.last_secret_number;
1983 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1984
1985 /* make it so new data pours into the new socket */
1986 stcb->sctp_socket = new_inp->sctp_socket;
1987 stcb->sctp_ep = new_inp;
1988
1989 /* Copy the port across */
1990 lport = new_inp->sctp_lport = old_inp->sctp_lport;
1991 rport = stcb->rport;
1992 /* Pull the tcb from the old association */
1993 LIST_REMOVE(stcb, sctp_tcbhash);
1994 LIST_REMOVE(stcb, sctp_tcblist);
1995
1996 /* Now insert the new_inp into the TCP connected hash */
1997 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1998 sctppcbinfo.hashtcpmark)];
1999
2000 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2001 /* Its safe to access */
2002 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2003
2004 /* Now move the tcb into the endpoint list */
2005 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2006 /*
2007 * Question, do we even need to worry about the ep-hash since we
2008 * only have one connection? Probably not :> so lets get rid of it
2009 * and not suck up any kernel memory in that.
2010 */
2011
2012 /* Ok. Let's restart timer. */
2013 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2014 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2015 stcb, net);
2016 }
2017
2018 SCTP_INP_INFO_WUNLOCK();
2019 if (new_inp->sctp_tcbhash != NULL) {
2020 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2021 new_inp->sctp_tcbhash = NULL;
2022 }
2023 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2024 /* Subset bound, so copy in the laddr list from the old_inp */
2025 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2026 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
2027 if (laddr == NULL) {
2028 /*
2029 * Gak, what can we do? This assoc is really
2030 * HOSED. We probably should send an abort
2031 * here.
2032 */
2033 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2034 continue;
2035 }
2036 SCTP_INCR_LADDR_COUNT();
2037 bzero(laddr, sizeof(*laddr));
2038 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2039 laddr->ifa = oladdr->ifa;
2040 atomic_add_int(&laddr->ifa->refcount, 1);
2041 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2042 sctp_nxt_addr);
2043 new_inp->laddr_count++;
2044 }
2045 }
2046 /*
2047 * Now any running timers need to be adjusted since we really don't
2048 * care if they are running or not just blast in the new_inp into
2049 * all of them.
2050 */
2051
2052 stcb->asoc.hb_timer.ep = (void *)new_inp;
2053 stcb->asoc.dack_timer.ep = (void *)new_inp;
2054 stcb->asoc.asconf_timer.ep = (void *)new_inp;
2055 stcb->asoc.strreset_timer.ep = (void *)new_inp;
2056 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2057 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2058 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2059 /* now what about the nets? */
2060 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2061 net->pmtu_timer.ep = (void *)new_inp;
2062 net->rxt_timer.ep = (void *)new_inp;
2063 net->fr_timer.ep = (void *)new_inp;
2064 }
2065 SCTP_INP_WUNLOCK(new_inp);
2066 SCTP_INP_WUNLOCK(old_inp);
2067}
2068
2069static int
2070sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2071{
2072 struct sctppcbhead *head;
2073 struct sctp_inpcb *t_inp;
2074 int fnd;
2075
2076 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2077 sctppcbinfo.hashmark)];
2078 LIST_FOREACH(t_inp, head, sctp_hash) {
2079 if (t_inp->sctp_lport != lport) {
2080 continue;
2081 }
2082 /* is it in the VRF in question */
2083 fnd = 0;
2084 if (t_inp->def_vrf_id == vrf_id)
2085 fnd = 1;
2086 if (!fnd)
2087 continue;
2088
2089 /* This one is in use. */
2090 /* check the v6/v4 binding issue */
2091 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2092 SCTP_IPV6_V6ONLY(t_inp)) {
2093 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2094 /* collision in V6 space */
2095 return (1);
2096 } else {
2097 /* inp is BOUND_V4 no conflict */
2098 continue;
2099 }
2100 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2101 /* t_inp is bound v4 and v6, conflict always */
2102 return (1);
2103 } else {
2104 /* t_inp is bound only V4 */
2105 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2106 SCTP_IPV6_V6ONLY(inp)) {
2107 /* no conflict */
2108 continue;
2109 }
2110 /* else fall through to conflict */
2111 }
2112 return (1);
2113 }
2114 return (0);
2115}
2116
2117
2118
2119int
2120sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2121 struct sctp_ifa *sctp_ifap, struct thread *p)
2122{
2123 /* bind a ep to a socket address */
2124 struct sctppcbhead *head;
2125 struct sctp_inpcb *inp, *inp_tmp;
2126 struct inpcb *ip_inp;
2127 int bindall;
2128 uint16_t lport;
2129 int error;
2130 uint32_t vrf_id;
2131
2132 lport = 0;
2133 error = 0;
2134 bindall = 1;
2135 inp = (struct sctp_inpcb *)so->so_pcb;
2136 ip_inp = (struct inpcb *)so->so_pcb;
2137#ifdef SCTP_DEBUG
2138 if (addr) {
2139 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2140 ntohs(((struct sockaddr_in *)addr)->sin_port));
2141 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2142 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2143 }
2144#endif
2145 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2146 /* already did a bind, subsequent binds NOT allowed ! */
2147 return (EINVAL);
2148 }
2149 if (addr != NULL) {
2150 if (addr->sa_family == AF_INET) {
2151 struct sockaddr_in *sin;
2152
2153 /* IPV6_V6ONLY socket? */
2154 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2155 return (EINVAL);
2156 }
2157 if (addr->sa_len != sizeof(*sin))
2158 return (EINVAL);
2159
2160 sin = (struct sockaddr_in *)addr;
2161 lport = sin->sin_port;
2162
2163 if (sin->sin_addr.s_addr != INADDR_ANY) {
2164 bindall = 0;
2165 }
2166 } else if (addr->sa_family == AF_INET6) {
2167 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2168 struct sockaddr_in6 *sin6;
2169
2170 sin6 = (struct sockaddr_in6 *)addr;
2171
2172 if (addr->sa_len != sizeof(*sin6))
2173 return (EINVAL);
2174
2175 lport = sin6->sin6_port;
2176 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2177 bindall = 0;
2178 /* KAME hack: embed scopeid */
2179 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
2180 return (EINVAL);
2181 }
2182 /* this must be cleared for ifa_ifwithaddr() */
2183 sin6->sin6_scope_id = 0;
2184 } else {
2185 return (EAFNOSUPPORT);
2186 }
2187 }
2188 /* Setup a vrf_id to be the default for the non-bind-all case. */
2189 vrf_id = inp->def_vrf_id;
2190
2191 SCTP_INP_INFO_WLOCK();
2192 SCTP_INP_WLOCK(inp);
2193 /* increase our count due to the unlock we do */
2194 SCTP_INP_INCR_REF(inp);
2195 if (lport) {
2196 /*
2197 * Did the caller specify a port? if so we must see if a ep
2198 * already has this one bound.
2199 */
2200 /* got to be root to get at low ports */
2201 if (ntohs(lport) < IPPORT_RESERVED) {
2202 if (p && (error =
2203 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2204 )) {
2205 SCTP_INP_DECR_REF(inp);
2206 SCTP_INP_WUNLOCK(inp);
2207 SCTP_INP_INFO_WUNLOCK();
2208 return (error);
2209 }
2210 }
2211 if (p == NULL) {
2212 SCTP_INP_DECR_REF(inp);
2213 SCTP_INP_WUNLOCK(inp);
2214 SCTP_INP_INFO_WUNLOCK();
2215 return (error);
2216 }
2217 SCTP_INP_WUNLOCK(inp);
2218 if (bindall) {
2219 vrf_id = inp->def_vrf_id;
2220 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2221 if (inp_tmp != NULL) {
2222 /*
2223 * lock guy returned and lower count note
2224 * that we are not bound so inp_tmp should
2225 * NEVER be inp. And it is this inp
2226 * (inp_tmp) that gets the reference bump,
2227 * so we must lower it.
2228 */
2229 SCTP_INP_DECR_REF(inp_tmp);
2230 SCTP_INP_DECR_REF(inp);
2231 /* unlock info */
2232 SCTP_INP_INFO_WUNLOCK();
2233 return (EADDRINUSE);
2234 }
2235 } else {
2236 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2237 if (inp_tmp != NULL) {
2238 /*
2239 * lock guy returned and lower count note
2240 * that we are not bound so inp_tmp should
2241 * NEVER be inp. And it is this inp
2242 * (inp_tmp) that gets the reference bump,
2243 * so we must lower it.
2244 */
2245 SCTP_INP_DECR_REF(inp_tmp);
2246 SCTP_INP_DECR_REF(inp);
2247 /* unlock info */
2248 SCTP_INP_INFO_WUNLOCK();
2249 return (EADDRINUSE);
2250 }
2251 }
2252 SCTP_INP_WLOCK(inp);
2253 if (bindall) {
2254 /* verify that no lport is not used by a singleton */
2255 if (sctp_isport_inuse(inp, lport, vrf_id)) {
2256 /* Sorry someone already has this one bound */
2257 SCTP_INP_DECR_REF(inp);
2258 SCTP_INP_WUNLOCK(inp);
2259 SCTP_INP_INFO_WUNLOCK();
2260 return (EADDRINUSE);
2261 }
2262 }
2263 } else {
2264 uint16_t first, last, candidate;
2265 uint16_t count;
2266 int done;
2267
2268 if (ip_inp->inp_flags & INP_HIGHPORT) {
2269 first = ipport_hifirstauto;
2270 last = ipport_hilastauto;
2271 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2272 if (p && (error =
2273 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2274 )) {
2275 SCTP_INP_DECR_REF(inp);
2276 SCTP_INP_WUNLOCK(inp);
2277 SCTP_INP_INFO_WUNLOCK();
2278 return (error);
2279 }
2280 first = ipport_lowfirstauto;
2281 last = ipport_lowlastauto;
2282 } else {
2283 first = ipport_firstauto;
2284 last = ipport_lastauto;
2285 }
2286 if (first > last) {
2287 uint16_t temp;
2288
2289 temp = first;
2290 first = last;
2291 last = temp;
2292 }
2293 count = last - first + 1; /* number of candidates */
2294 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2295
2296 done = 0;
2297 while (!done) {
2298 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2299 done = 1;
2300 }
2301 if (!done) {
2302 if (--count == 0) {
2303 SCTP_INP_DECR_REF(inp);
2304 SCTP_INP_WUNLOCK(inp);
2305 SCTP_INP_INFO_WUNLOCK();
2306 return (EADDRINUSE);
2307 }
2308 if (candidate == last)
2309 candidate = first;
2310 else
2311 candidate = candidate + 1;
2312 }
2313 }
2314 lport = htons(candidate);
2315 }
2316 SCTP_INP_DECR_REF(inp);
2317 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2318 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2319 /*
2320 * this really should not happen. The guy did a non-blocking
2321 * bind and then did a close at the same time.
2322 */
2323 SCTP_INP_WUNLOCK(inp);
2324 SCTP_INP_INFO_WUNLOCK();
2325 return (EINVAL);
2326 }
2327 /* ok we look clear to give out this port, so lets setup the binding */
2328 if (bindall) {
2329 /* binding to all addresses, so just set in the proper flags */
2330 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2331 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2332 /* set the automatic addr changes from kernel flag */
2333 if (sctp_auto_asconf == 0) {
2334 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2335 } else {
2336 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2337 }
2338 } else {
2339 /*
2340 * bind specific, make sure flags is off and add a new
2341 * address structure to the sctp_addr_list inside the ep
2342 * structure.
2343 *
2344 * We will need to allocate one and insert it at the head. The
2345 * socketopt call can just insert new addresses in there as
2346 * well. It will also have to do the embed scope kame hack
2347 * too (before adding).
2348 */
2349 struct sctp_ifa *ifa;
2350 struct sockaddr_storage store_sa;
2351
2352 memset(&store_sa, 0, sizeof(store_sa));
2353 if (addr->sa_family == AF_INET) {
2354 struct sockaddr_in *sin;
2355
2356 sin = (struct sockaddr_in *)&store_sa;
2357 memcpy(sin, addr, sizeof(struct sockaddr_in));
2358 sin->sin_port = 0;
2359 } else if (addr->sa_family == AF_INET6) {
2360 struct sockaddr_in6 *sin6;
2361
2362 sin6 = (struct sockaddr_in6 *)&store_sa;
2363 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2364 sin6->sin6_port = 0;
2365 }
2366 /*
2367 * first find the interface with the bound address need to
2368 * zero out the port to find the address! yuck! can't do
2369 * this earlier since need port for sctp_pcb_findep()
2370 */
2371 if (sctp_ifap)
2372 ifa = sctp_ifap;
2373 else
2374 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2375 vrf_id, 0);
2376 if (ifa == NULL) {
2377 /* Can't find an interface with that address */
2378 SCTP_INP_WUNLOCK(inp);
2379 SCTP_INP_INFO_WUNLOCK();
2380 return (EADDRNOTAVAIL);
2381 }
2382 if (addr->sa_family == AF_INET6) {
2383 /* GAK, more FIXME IFA lock? */
2384 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2385 /* Can't bind a non-existent addr. */
2386 SCTP_INP_WUNLOCK(inp);
2387 SCTP_INP_INFO_WUNLOCK();
2388 return (EINVAL);
2389 }
2390 }
2391 /* we're not bound all */
2392 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2393 /* allow bindx() to send ASCONF's for binding changes */
2394 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2395 /* clear automatic addr changes from kernel flag */
2396 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2397
2398 /* add this address to the endpoint list */
2399 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2400 if (error != 0) {
2401 SCTP_INP_WUNLOCK(inp);
2402 SCTP_INP_INFO_WUNLOCK();
2403 return (error);
2404 }
2405 inp->laddr_count++;
2406 }
2407 /* find the bucket */
2408 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2409 sctppcbinfo.hashmark)];
2410 /* put it in the bucket */
2411 LIST_INSERT_HEAD(head, inp, sctp_hash);
2412 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2413 head, ntohs(lport));
2414 /* set in the port */
2415 inp->sctp_lport = lport;
2416
2417 /* turn off just the unbound flag */
2418 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2419 SCTP_INP_WUNLOCK(inp);
2420 SCTP_INP_INFO_WUNLOCK();
2421 return (0);
2422}
2423
2424
2425static void
2426sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2427{
2428 struct sctp_iterator *it;
2429
2430 /*
2431 * We enter with the only the ITERATOR_LOCK in place and a write
2432 * lock on the inp_info stuff.
2433 */
2434
2435 /*
2436 * Go through all iterators, we must do this since it is possible
2437 * that some iterator does NOT have the lock, but is waiting for it.
2438 * And the one that had the lock has either moved in the last
2439 * iteration or we just cleared it above. We need to find all of
2440 * those guys. The list of iterators should never be very big
2441 * though.
2442 */
2443 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2444 if (it == inp->inp_starting_point_for_iterator)
2445 /* skip this guy, he's special */
2446 continue;
2447 if (it->inp == inp) {
2448 /*
2449 * This is tricky and we DON'T lock the iterator.
2450 * Reason is he's running but waiting for me since
2451 * inp->inp_starting_point_for_iterator has the lock
2452 * on me (the guy above we skipped). This tells us
2453 * its is not running but waiting for
2454 * inp->inp_starting_point_for_iterator to be
2455 * released by the guy that does have our INP in a
2456 * lock.
2457 */
2458 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2459 it->inp = NULL;
2460 it->stcb = NULL;
2461 } else {
2462 /* set him up to do the next guy not me */
2463 it->inp = inp_next;
2464 it->stcb = NULL;
2465 }
2466 }
2467 }
2468 it = inp->inp_starting_point_for_iterator;
2469 if (it) {
2470 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2471 it->inp = NULL;
2472 } else {
2473 it->inp = inp_next;
2474 }
2475 it->stcb = NULL;
2476 }
2477}
2478
2479/* release sctp_inpcb unbind the port */
2480void
2481sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2482{
2483 /*
2484 * Here we free a endpoint. We must find it (if it is in the Hash
2485 * table) and remove it from there. Then we must also find it in the
2486 * overall list and remove it from there. After all removals are
2487 * complete then any timer has to be stopped. Then start the actual
2488 * freeing. a) Any local lists. b) Any associations. c) The hash of
2489 * all associations. d) finally the ep itself.
2490 */
2491 struct sctp_pcb *m;
2492 struct sctp_inpcb *inp_save;
2493 struct sctp_tcb *asoc, *nasoc;
2494 struct sctp_laddr *laddr, *nladdr;
2495 struct inpcb *ip_pcb;
2496 struct socket *so;
2497
2498 struct sctp_queued_to_read *sq;
2499
2500
2501 int cnt;
2502 sctp_sharedkey_t *shared_key;
2503
2504
2505#ifdef SCTP_LOG_CLOSING
2506 sctp_log_closing(inp, NULL, 0);
2507#endif
2508
2509 SCTP_ITERATOR_LOCK();
2510 so = inp->sctp_socket;
2511 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2512 /* been here before.. eeks.. get out of here */
2513 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2514 SCTP_ITERATOR_UNLOCK();
2515#ifdef SCTP_LOG_CLOSING
2516 sctp_log_closing(inp, NULL, 1);
2517#endif
2518 return;
2519 }
2520 SCTP_ASOC_CREATE_LOCK(inp);
2521 SCTP_INP_INFO_WLOCK();
2522
2523 SCTP_INP_WLOCK(inp);
2524 /* First time through we have the socket lock, after that no more. */
2525 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2526 /*
2527 * Once we are in we can remove the flag from = 1 is only
2528 * passed from the actual closing routines that are called
2529 * via the sockets layer.
2530 */
2531 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2532 }
2533 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2534 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2535
2536 if (inp->control) {
2537 sctp_m_freem(inp->control);
2538 inp->control = NULL;
2539 }
2540 if (inp->pkt) {
2541 sctp_m_freem(inp->pkt);
2542 inp->pkt = NULL;
2543 }
2544 m = &inp->sctp_ep;
2545 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
2546 * here but I will be nice :> (i.e.
2547 * ip_pcb = ep;) */
2548 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2549 int cnt_in_sd;
2550
2551 cnt_in_sd = 0;
2552 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2553 asoc = nasoc) {
2554 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2555 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2556 /* Skip guys being freed */
2557 asoc->sctp_socket = NULL;
2558 cnt_in_sd++;
2559 continue;
2560 }
2561 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2562 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2563 /*
2564 * If we have data in queue, we don't want
2565 * to just free since the app may have done,
2566 * send()/close or connect/send/close. And
2567 * it wants the data to get across first.
2568 */
2569 if (asoc->asoc.total_output_queue_size == 0) {
2570 /*
2571 * Just abandon things in the front
2572 * states
2573 */
2574 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2);
2575 continue;
2576 }
2577 }
2578 SCTP_TCB_LOCK(asoc);
2579 /* Disconnect the socket please */
2580 asoc->sctp_socket = NULL;
2581 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2582 if ((asoc->asoc.size_on_reasm_queue > 0) ||
2583 (asoc->asoc.control_pdapi) ||
2584 (asoc->asoc.size_on_all_streams > 0) ||
2585 (so && (so->so_rcv.sb_cc > 0))
2586 ) {
2587 /* Left with Data unread */
2588 struct mbuf *op_err;
2589
2590 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2591 0, M_DONTWAIT, 1, MT_DATA);
2592 if (op_err) {
2593 /* Fill in the user initiated abort */
2594 struct sctp_paramhdr *ph;
2595 uint32_t *ippp;
2596
2597 SCTP_BUF_LEN(op_err) =
2598 sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2599 ph = mtod(op_err,
2600 struct sctp_paramhdr *);
2601 ph->param_type = htons(
2602 SCTP_CAUSE_USER_INITIATED_ABT);
2603 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2604 ippp = (uint32_t *) (ph + 1);
2605 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2606 }
2607 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2608 sctp_send_abort_tcb(asoc, op_err);
2609 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2610 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2611 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2612 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2613 }
2614 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4);
2615 continue;
2616 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2617 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2618 (asoc->asoc.stream_queue_cnt == 0)
2619 ) {
2620 if (asoc->asoc.locked_on_sending) {
2621 goto abort_anyway;
2622 }
2623 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2624 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2625 /*
2626 * there is nothing queued to send,
2627 * so I send shutdown
2628 */
2629 sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2630 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2631 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2632 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2633 }
2634 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2635 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2636 asoc->asoc.primary_destination);
2637 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2638 asoc->asoc.primary_destination);
2639 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2640 }
2641 } else {
2642 /* mark into shutdown pending */
2643 struct sctp_stream_queue_pending *sp;
2644
2645 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2646 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2647 asoc->asoc.primary_destination);
2648 if (asoc->asoc.locked_on_sending) {
2649 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2650 sctp_streamhead);
2651 if (sp == NULL) {
2652 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2653 asoc->asoc.locked_on_sending,
2654 asoc->asoc.locked_on_sending->stream_no);
2655 } else {
2656 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2657 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2658 }
2659 }
2660 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2661 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2662 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2663 struct mbuf *op_err;
2664
2665 abort_anyway:
2666 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2667 0, M_DONTWAIT, 1, MT_DATA);
2668 if (op_err) {
2669 /*
2670 * Fill in the user
2671 * initiated abort
2672 */
2673 struct sctp_paramhdr *ph;
2674 uint32_t *ippp;
2675
2676 SCTP_BUF_LEN(op_err) =
2677 (sizeof(struct sctp_paramhdr) +
2678 sizeof(uint32_t));
2679 ph = mtod(op_err,
2680 struct sctp_paramhdr *);
2681 ph->param_type = htons(
2682 SCTP_CAUSE_USER_INITIATED_ABT);
2683 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2684 ippp = (uint32_t *) (ph + 1);
2685 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
2686 }
2687 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
2688 sctp_send_abort_tcb(asoc, op_err);
2689 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2690 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2691 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2692 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2693 }
2694 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6);
2695 continue;
2696 }
2697 }
2698 cnt_in_sd++;
2699 SCTP_TCB_UNLOCK(asoc);
2700 }
2701 /* now is there some left in our SHUTDOWN state? */
2702 if (cnt_in_sd) {
2703 SCTP_INP_WUNLOCK(inp);
2704 SCTP_ASOC_CREATE_UNLOCK(inp);
2705 SCTP_INP_INFO_WUNLOCK();
2706 SCTP_ITERATOR_UNLOCK();
2707#ifdef SCTP_LOG_CLOSING
2708 sctp_log_closing(inp, NULL, 2);
2709#endif
2710 return;
2711 }
2712 }
2713 inp->sctp_socket = NULL;
2714 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2715 SCTP_PCB_FLAGS_UNBOUND) {
2716 /*
2717 * ok, this guy has been bound. It's port is somewhere in
2718 * the sctppcbinfo hash table. Remove it!
2719 */
2720 LIST_REMOVE(inp, sctp_hash);
2721 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2722 }
2723 /*
2724 * If there is a timer running to kill us, forget it, since it may
2725 * have a contest on the INP lock.. which would cause us to die ...
2726 */
2727 cnt = 0;
2728 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2729 asoc = nasoc) {
2730 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2731 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2732 cnt++;
2733 continue;
2734 }
2735 /* Free associations that are NOT killing us */
2736 SCTP_TCB_LOCK(asoc);
2737 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2738 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2739 struct mbuf *op_err;
2740 uint32_t *ippp;
2741
2742 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2743 0, M_DONTWAIT, 1, MT_DATA);
2744 if (op_err) {
2745 /* Fill in the user initiated abort */
2746 struct sctp_paramhdr *ph;
2747
2748 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
2749 sizeof(uint32_t));
2750 ph = mtod(op_err, struct sctp_paramhdr *);
2751 ph->param_type = htons(
2752 SCTP_CAUSE_USER_INITIATED_ABT);
2753 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2754 ippp = (uint32_t *) (ph + 1);
2755 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
2756
2757 }
2758 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
2759 sctp_send_abort_tcb(asoc, op_err);
2760 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2761 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2762 cnt++;
2763 SCTP_TCB_UNLOCK(asoc);
2764 continue;
2765 }
2766 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2767 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2768 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2769 }
2770 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8);
2771 }
2772 if (cnt) {
2773 /* Ok we have someone out there that will kill us */
2774 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2775 SCTP_INP_WUNLOCK(inp);
2776 SCTP_ASOC_CREATE_UNLOCK(inp);
2777 SCTP_INP_INFO_WUNLOCK();
2778 SCTP_ITERATOR_UNLOCK();
2779#ifdef SCTP_LOG_CLOSING
2780 sctp_log_closing(inp, NULL, 3);
2781#endif
2782 return;
2783 }
2784 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2785 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2786 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2787 SCTP_INP_WUNLOCK(inp);
2788 SCTP_ASOC_CREATE_UNLOCK(inp);
2789 SCTP_INP_INFO_WUNLOCK();
2790 SCTP_ITERATOR_UNLOCK();
2791#ifdef SCTP_LOG_CLOSING
2792 sctp_log_closing(inp, NULL, 4);
2793#endif
2794 return;
2795 }
2796 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2797 inp->sctp_ep.signature_change.type = 0;
2798 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2799
2800#ifdef SCTP_LOG_CLOSING
2801 sctp_log_closing(inp, NULL, 5);
2802#endif
2803
2804 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2805 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2806 /* Clear the read queue */
2807 /* sa_ignore FREED_MEMORY */
2808 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2809 /* Its only abandoned if it had data left */
2810 if (sq->length)
2811 SCTP_STAT_INCR(sctps_left_abandon);
2812
2813 TAILQ_REMOVE(&inp->read_queue, sq, next);
2814 sctp_free_remote_addr(sq->whoFrom);
2815 if (so)
2816 so->so_rcv.sb_cc -= sq->length;
2817 if (sq->data) {
2818 sctp_m_freem(sq->data);
2819 sq->data = NULL;
2820 }
2821 /*
2822 * no need to free the net count, since at this point all
2823 * assoc's are gone.
2824 */
2825 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2826 SCTP_DECR_READQ_COUNT();
2827 }
2828 /* Now the sctp_pcb things */
2829 /*
2830 * free each asoc if it is not already closed/free. we can't use the
2831 * macro here since le_next will get freed as part of the
2832 * sctp_free_assoc() call.
2833 */
2834 cnt = 0;
2835 if (so) {
2836#ifdef FAST_IPSEC
2837 ipsec4_delete_pcbpolicy(ip_pcb);
2838#endif /* FAST_IPSEC */
2839
2840 /* Unlocks not needed since the socket is gone now */
2841 }
2842 if (ip_pcb->inp_options) {
2843 (void)sctp_m_free(ip_pcb->inp_options);
2844 ip_pcb->inp_options = 0;
2845 }
2846 if (ip_pcb->inp_moptions) {
2847 inp_freemoptions(ip_pcb->inp_moptions);
2848 ip_pcb->inp_moptions = 0;
2849 }
2850#ifdef INET6
2851 if (ip_pcb->inp_vflag & INP_IPV6) {
2852 struct in6pcb *in6p;
2853
2854 in6p = (struct in6pcb *)inp;
2855 ip6_freepcbopts(in6p->in6p_outputopts);
2856 }
2857#endif /* INET6 */
2858 ip_pcb->inp_vflag = 0;
2859 /* free up authentication fields */
2860 if (inp->sctp_ep.local_auth_chunks != NULL)
2861 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2862 if (inp->sctp_ep.local_hmacs != NULL)
2863 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2864
2865 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2866 while (shared_key) {
2867 LIST_REMOVE(shared_key, next);
2868 sctp_free_sharedkey(shared_key);
2869 /* sa_ignore FREED_MEMORY */
2870 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2871 }
2872
2873 inp_save = LIST_NEXT(inp, sctp_list);
2874 LIST_REMOVE(inp, sctp_list);
2875
2876 /* fix any iterators only after out of the list */
2877 sctp_iterator_inp_being_freed(inp, inp_save);
2878 /*
2879 * if we have an address list the following will free the list of
2880 * ifaddr's that are set into this ep. Again macro limitations here,
2881 * since the LIST_FOREACH could be a bad idea.
2882 */
2883 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2884 laddr = nladdr) {
2885 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2886 sctp_remove_laddr(laddr);
2887 }
2888
2889#ifdef SCTP_TRACK_FREED_ASOCS
2890 /* TEMP CODE */
2891 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2892 asoc = nasoc) {
2893 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2894 LIST_REMOVE(asoc, sctp_tcblist);
2895 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2896 SCTP_DECR_ASOC_COUNT();
2897 }
2898 /* *** END TEMP CODE *** */
2899#endif
2900 /* Now lets see about freeing the EP hash table. */
2901 if (inp->sctp_tcbhash != NULL) {
2902 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2903 inp->sctp_tcbhash = NULL;
2904 }
2905 /* Now we must put the ep memory back into the zone pool */
2906 INP_LOCK_DESTROY(&inp->ip_inp.inp);
2907 SCTP_INP_LOCK_DESTROY(inp);
2908 SCTP_INP_READ_DESTROY(inp);
2909 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2910 SCTP_INP_INFO_WUNLOCK();
2911
2912 SCTP_ITERATOR_UNLOCK();
2913
2914 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2915 SCTP_DECR_EP_COUNT();
2916
2917}
2918
2919
2920struct sctp_nets *
2921sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2922{
2923 struct sctp_nets *net;
2924
2925 /* locate the address */
2926 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2927 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2928 return (net);
2929 }
2930 return (NULL);
2931}
2932
2933
2934int
2935sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2936{
2937 struct sctp_ifa *sctp_ifa;
2938
2939 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2940 if (sctp_ifa) {
2941 return (1);
2942 } else {
2943 return (0);
2944 }
2945}
2946
2947void
2948sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net)
2949{
2950 net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND));
2951 /* we always get at LEAST 2 MTU's */
2952 if (net->cwnd < (2 * net->mtu)) {
2953 net->cwnd = 2 * net->mtu;
2954 }
2955 net->ssthresh = stcb->asoc.peers_rwnd;
2956}
2957
2958
2959
2960/*
2961 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2962 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2963 * stats of stuff.
2964 */
2965int
2966sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2967 int set_scope, int from)
2968{
2969 /*
2970 * The following is redundant to the same lines in the
2971 * sctp_aloc_assoc() but is needed since other's call the add
2972 * address function
2973 */
2974 struct sctp_nets *net, *netfirst;
2975 int addr_inscope;
2976
2977 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
2978 from);
2979 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
2980
2981 netfirst = sctp_findnet(stcb, newaddr);
2982 if (netfirst) {
2983 /*
2984 * Lie and return ok, we don't want to make the association
2985 * go away for this behavior. It will happen in the TCP
2986 * model in a connected socket. It does not reach the hash
2987 * table until after the association is built so it can't be
2988 * found. Mark as reachable, since the initial creation will
2989 * have been cleared and the NOT_IN_ASSOC flag will have
2990 * been added... and we don't want to end up removing it
2991 * back out.
2992 */
2993 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2994 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
2995 SCTP_ADDR_UNCONFIRMED);
2996 } else {
2997 netfirst->dest_state = SCTP_ADDR_REACHABLE;
2998 }
2999
3000 return (0);
3001 }
3002 addr_inscope = 1;
3003 if (newaddr->sa_family == AF_INET) {
3004 struct sockaddr_in *sin;
3005
3006 sin = (struct sockaddr_in *)newaddr;
3007 if (sin->sin_addr.s_addr == 0) {
3008 /* Invalid address */
3009 return (-1);
3010 }
3011 /* zero out the bzero area */
3012 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3013
3014 /* assure len is set */
3015 sin->sin_len = sizeof(struct sockaddr_in);
3016 if (set_scope) {
3017#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3018 stcb->ipv4_local_scope = 1;
3019#else
3020 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3021 stcb->asoc.ipv4_local_scope = 1;
3022 }
3023#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3024 } else {
3025 /* Validate the address is in scope */
3026 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3027 (stcb->asoc.ipv4_local_scope == 0)) {
3028 addr_inscope = 0;
3029 }
3030 }
3031 } else if (newaddr->sa_family == AF_INET6) {
3032 struct sockaddr_in6 *sin6;
3033
3034 sin6 = (struct sockaddr_in6 *)newaddr;
3035 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3036 /* Invalid address */
3037 return (-1);
3038 }
3039 /* assure len is set */
3040 sin6->sin6_len = sizeof(struct sockaddr_in6);
3041 if (set_scope) {
3042 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3043 stcb->asoc.loopback_scope = 1;
3044 stcb->asoc.local_scope = 0;
3045 stcb->asoc.ipv4_local_scope = 1;
3046 stcb->asoc.site_scope = 1;
3047 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3048 /*
3049 * If the new destination is a LINK_LOCAL we
3050 * must have common site scope. Don't set
3051 * the local scope since we may not share
3052 * all links, only loopback can do this.
3053 * Links on the local network would also be
3054 * on our private network for v4 too.
3055 */
3056 stcb->asoc.ipv4_local_scope = 1;
3057 stcb->asoc.site_scope = 1;
3058 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3059 /*
3060 * If the new destination is SITE_LOCAL then
3061 * we must have site scope in common.
3062 */
3063 stcb->asoc.site_scope = 1;
3064 }
3065 } else {
3066 /* Validate the address is in scope */
3067 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3068 (stcb->asoc.loopback_scope == 0)) {
3069 addr_inscope = 0;
3070 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3071 (stcb->asoc.local_scope == 0)) {
3072 addr_inscope = 0;
3073 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3074 (stcb->asoc.site_scope == 0)) {
3075 addr_inscope = 0;
3076 }
3077 }
3078 } else {
3079 /* not supported family type */
3080 return (-1);
3081 }
3082 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3083 if (net == NULL) {
3084 return (-1);
3085 }
3086 SCTP_INCR_RADDR_COUNT();
3087 bzero(net, sizeof(*net));
3088 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3089 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3090 if (newaddr->sa_family == AF_INET) {
3091 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3092 } else if (newaddr->sa_family == AF_INET6) {
3093 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3094 }
3095 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3096 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3097 stcb->asoc.loopback_scope = 1;
3098 stcb->asoc.ipv4_local_scope = 1;
3099 stcb->asoc.local_scope = 0;
3100 stcb->asoc.site_scope = 1;
3101 addr_inscope = 1;
3102 }
3103 net->failure_threshold = stcb->asoc.def_net_failure;
3104 if (addr_inscope == 0) {
3105 net->dest_state = (SCTP_ADDR_REACHABLE |
3106 SCTP_ADDR_OUT_OF_SCOPE);
3107 } else {
3108 if (from == SCTP_ADDR_IS_CONFIRMED)
3109 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3110 net->dest_state = SCTP_ADDR_REACHABLE;
3111 else
3112 net->dest_state = SCTP_ADDR_REACHABLE |
3113 SCTP_ADDR_UNCONFIRMED;
3114 }
3115 /*
3116 * We set this to 0, the timer code knows that this means its an
3117 * initial value
3118 */
3119 net->RTO = 0;
3120 net->RTO_measured = 0;
3121 stcb->asoc.numnets++;
3122 *(&net->ref_count) = 1;
3123 net->tos_flowlabel = 0;
3124#ifdef INET
3125 if (newaddr->sa_family == AF_INET)
3126 net->tos_flowlabel = stcb->asoc.default_tos;
3127#endif
3128#ifdef INET6
3129 if (newaddr->sa_family == AF_INET6)
3130 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3131#endif
3132 /* Init the timer structure */
3133 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3134 SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3135 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3136
3137 /* Now generate a route for this guy */
3138 /* KAME hack: embed scopeid */
3139 if (newaddr->sa_family == AF_INET6) {
3140 struct sockaddr_in6 *sin6;
3141
3142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3143 (void)sa6_embedscope(sin6, ip6_use_defzone);
3144 sin6->sin6_scope_id = 0;
3145 }
3146 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3147
3148 if (newaddr->sa_family == AF_INET6) {
3149 struct sockaddr_in6 *sin6;
3150
3151 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3152 (void)sa6_recoverscope(sin6);
3153 }
3154 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3155 /* Get source address */
3156 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3157 stcb,
3158 (sctp_route_t *) & net->ro,
3159 net,
3160 0,
3161 stcb->asoc.vrf_id);
3162 /* Now get the interface MTU */
3163 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3164 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3165 } else {
3166 net->mtu = 0;
3167 }
3168#ifdef SCTP_PRINT_FOR_B_AND_M
3169 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3170#endif
3171 if (net->mtu == 0) {
3172 /* Huh ?? */
3173 net->mtu = SCTP_DEFAULT_MTU;
3174 } else {
3175 uint32_t rmtu;
3176
3177 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3178#ifdef SCTP_PRINT_FOR_B_AND_M
3179 SCTP_PRINTF("The route mtu is %d\n", rmtu);
3180#endif
3181 if (rmtu == 0) {
3182 /*
3183 * Start things off to match mtu of
3184 * interface please.
3185 */
3186 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3187 net->ro.ro_rt, net->mtu);
3188 } else {
3189 /*
3190 * we take the route mtu over the interface,
3191 * since the route may be leading out the
3192 * loopback, or a different interface.
3193 */
3194 net->mtu = rmtu;
3195 }
3196 }
3197 if (from == SCTP_ALLOC_ASOC) {
3198#ifdef SCTP_PRINT_FOR_B_AND_M
3199 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3200#endif
3201 stcb->asoc.smallest_mtu = net->mtu;
3202 }
3203 } else {
3204 net->mtu = stcb->asoc.smallest_mtu;
3205 }
3206 if (stcb->asoc.smallest_mtu > net->mtu) {
3207#ifdef SCTP_PRINT_FOR_B_AND_M
3208 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3209 net->mtu, stcb->asoc.smallest_mtu);
3210#endif
3211 stcb->asoc.smallest_mtu = net->mtu;
3212 }
3213 /*
3214 * We take the max of the burst limit times a MTU or the
3215 * INITIAL_CWND. We then limit this to 4 MTU's of sending.
3216 */
3217 sctp_set_initial_cc_param(stcb, net);
3218
3219
3220 if (sctp_logging_level & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
3221 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION);
3222 }
3223 /*
3224 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3225 * of assoc (2005/06/27, iyengar@cis.udel.edu)
3226 */
3227 net->find_pseudo_cumack = 1;
3228 net->find_rtx_pseudo_cumack = 1;
3229 net->src_addr_selected = 0;
3230 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3231 if (net->ro.ro_rt == NULL) {
3232 /* Since we have no route put it at the back */
3233 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3234 } else if (netfirst == NULL) {
3235 /* We are the first one in the pool. */
3236 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3237 } else if (netfirst->ro.ro_rt == NULL) {
3238 /*
3239 * First one has NO route. Place this one ahead of the first
3240 * one.
3241 */
3242 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3243 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3244 /*
3245 * This one has a different interface than the one at the
3246 * top of the list. Place it ahead.
3247 */
3248 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3249 } else {
3250 /*
3251 * Ok we have the same interface as the first one. Move
3252 * forward until we find either a) one with a NULL route...
3253 * insert ahead of that b) one with a different ifp.. insert
3254 * after that. c) end of the list.. insert at the tail.
3255 */
3256 struct sctp_nets *netlook;
3257
3258 do {
3259 netlook = TAILQ_NEXT(netfirst, sctp_next);
3260 if (netlook == NULL) {
3261 /* End of the list */
3262 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3263 break;
3264 } else if (netlook->ro.ro_rt == NULL) {
3265 /* next one has NO route */
3266 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3267 break;
3268 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3269 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3270 net, sctp_next);
3271 break;
3272 }
3273 /* Shift forward */
3274 netfirst = netlook;
3275 } while (netlook != NULL);
3276 }
3277
3278 /* got to have a primary set */
3279 if (stcb->asoc.primary_destination == 0) {
3280 stcb->asoc.primary_destination = net;
3281 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3282 (net->ro.ro_rt) &&
3283 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3284 /* No route to current primary adopt new primary */
3285 stcb->asoc.primary_destination = net;
3286 }
3287 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3288 net);
3289 /* Validate primary is first */
3290 net = TAILQ_FIRST(&stcb->asoc.nets);
3291 if ((net != stcb->asoc.primary_destination) &&
3292 (stcb->asoc.primary_destination)) {
3293 /*
3294 * first one on the list is NOT the primary sctp_cmpaddr()
3295 * is much more efficent if the primary is the first on the
3296 * list, make it so.
3297 */
3298 TAILQ_REMOVE(&stcb->asoc.nets,
3299 stcb->asoc.primary_destination, sctp_next);
3300 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3301 stcb->asoc.primary_destination, sctp_next);
3302 }
3303 return (0);
3304}
3305
3306
3307/*
3308 * allocate an association and add it to the endpoint. The caller must be
3309 * careful to add all additional addresses once they are know right away or
3310 * else the assoc will be may experience a blackout scenario.
3311 */
3312struct sctp_tcb *
3313sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3314 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id)
3315{
3316 struct sctp_tcb *stcb;
3317 struct sctp_association *asoc;
3318 struct sctpasochead *head;
3319 uint16_t rport;
3320 int err;
3321
3322 /*
3323 * Assumption made here: Caller has done a
3324 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3325 * address does not exist already.
3326 */
3327 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3328 /* Hit max assoc, sorry no more */
3329 *error = ENOBUFS;
3330 return (NULL);
3331 }
3332 if (firstaddr == NULL) {
3333 *error = EINVAL;
3334 return (NULL);
3335 }
3336 SCTP_INP_RLOCK(inp);
3337 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3338 /*
3339 * If its in the TCP pool, its NOT allowed to create an
3340 * association. The parent listener needs to call
3341 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3342 * off, or connected one does this.. its an error.
3343 */
3344 SCTP_INP_RUNLOCK(inp);
3345 *error = EINVAL;
3346 return (NULL);
3347 }
3348 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3349#ifdef SCTP_DEBUG
3350 if (firstaddr) {
3351 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3352 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3353 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3354 } else {
3355 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3356 }
3357#endif /* SCTP_DEBUG */
3358 if (firstaddr->sa_family == AF_INET) {
3359 struct sockaddr_in *sin;
3360
3361 sin = (struct sockaddr_in *)firstaddr;
3362 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3363 /* Invalid address */
3364 SCTP_INP_RUNLOCK(inp);
3365 *error = EINVAL;
3366 return (NULL);
3367 }
3368 rport = sin->sin_port;
3369 } else if (firstaddr->sa_family == AF_INET6) {
3370 struct sockaddr_in6 *sin6;
3371
3372 sin6 = (struct sockaddr_in6 *)firstaddr;
3373 if ((sin6->sin6_port == 0) ||
3374 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3375 /* Invalid address */
3376 SCTP_INP_RUNLOCK(inp);
3377 *error = EINVAL;
3378 return (NULL);
3379 }
3380 rport = sin6->sin6_port;
3381 } else {
3382 /* not supported family type */
3383 SCTP_INP_RUNLOCK(inp);
3384 *error = EINVAL;
3385 return (NULL);
3386 }
3387 SCTP_INP_RUNLOCK(inp);
3388 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3389 /*
3390 * If you have not performed a bind, then we need to do the
3391 * ephemerial bind for you.
3392 */
3393 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3394 (struct sockaddr *)NULL, (struct sctp_ifa *)NULL,
3395 (struct thread *)NULL
3396 ))) {
3397 /* bind error, probably perm */
3398 *error = err;
3399 return (NULL);
3400 }
3401 }
3402 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3403 if (stcb == NULL) {
3404 /* out of memory? */
3405 *error = ENOMEM;
3406 return (NULL);
3407 }
3408 SCTP_INCR_ASOC_COUNT();
3409
3410 bzero(stcb, sizeof(*stcb));
3411 asoc = &stcb->asoc;
3412 SCTP_TCB_LOCK_INIT(stcb);
3413 SCTP_TCB_SEND_LOCK_INIT(stcb);
3414 /* setup back pointer's */
3415 stcb->sctp_ep = inp;
3416 stcb->sctp_socket = inp->sctp_socket;
3417 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3418 /* failed */
3419 SCTP_TCB_LOCK_DESTROY(stcb);
3420 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3421 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3422 SCTP_DECR_ASOC_COUNT();
3423 *error = err;
3424 return (NULL);
3425 }
3426 /* and the port */
3427 stcb->rport = rport;
3428 SCTP_INP_INFO_WLOCK();
3429 SCTP_INP_WLOCK(inp);
3430 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3431 /* inpcb freed while alloc going on */
3432 SCTP_TCB_LOCK_DESTROY(stcb);
3433 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3434 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3435 SCTP_INP_WUNLOCK(inp);
3436 SCTP_INP_INFO_WUNLOCK();
3437 SCTP_DECR_ASOC_COUNT();
3438 *error = EINVAL;
3439 return (NULL);
3440 }
3441 SCTP_TCB_LOCK(stcb);
3442
3443 /* now that my_vtag is set, add it to the hash */
3444 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3445 sctppcbinfo.hashasocmark)];
3446 /* put it in the bucket in the vtag hash of assoc's for the system */
3447 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3448 SCTP_INP_INFO_WUNLOCK();
3449
3450 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3451 /* failure.. memory error? */
3452 if (asoc->strmout) {
3453 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3454 asoc->strmout = NULL;
3455 }
3456 if (asoc->mapping_array) {
3457 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3458 asoc->mapping_array = NULL;
3459 }
3460 SCTP_DECR_ASOC_COUNT();
3461 SCTP_TCB_LOCK_DESTROY(stcb);
3462 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3463 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3464 SCTP_INP_WUNLOCK(inp);
3465 *error = ENOBUFS;
3466 return (NULL);
3467 }
3468 /* Init all the timers */
3469 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3470 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3471 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3472 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3473 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3474 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3475 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3476
3477 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3478 /* now file the port under the hash as well */
3479 if (inp->sctp_tcbhash != NULL) {
3480 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3481 inp->sctp_hashmark)];
3482 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3483 }
3484 SCTP_INP_WUNLOCK(inp);
3485 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3486 return (stcb);
3487}
3488
3489
3490void
3491sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3492{
3493 struct sctp_association *asoc;
3494
3495 asoc = &stcb->asoc;
3496 asoc->numnets--;
3497 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3498 if (net == asoc->primary_destination) {
3499 /* Reset primary */
3500 struct sctp_nets *lnet;
3501
3502 lnet = TAILQ_FIRST(&asoc->nets);
3503 /* Try to find a confirmed primary */
3504 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3505 }
3506 if (net == asoc->last_data_chunk_from) {
3507 /* Reset primary */
3508 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3509 }
3510 if (net == asoc->last_control_chunk_from) {
3511 /* Clear net */
3512 asoc->last_control_chunk_from = NULL;
3513 }
3514 sctp_free_remote_addr(net);
3515}
3516
3517/*
3518 * remove a remote endpoint address from an association, it will fail if the
3519 * address does not exist.
3520 */
3521int
3522sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3523{
3524 /*
3525 * Here we need to remove a remote address. This is quite simple, we
3526 * first find it in the list of address for the association
3527 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3528 * on that item. Note we do not allow it to be removed if there are
3529 * no other addresses.
3530 */
3531 struct sctp_association *asoc;
3532 struct sctp_nets *net, *net_tmp;
3533
3534 asoc = &stcb->asoc;
3535
3536 /* locate the address */
3537 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3538 net_tmp = TAILQ_NEXT(net, sctp_next);
3539 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3540 continue;
3541 }
3542 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3543 remaddr)) {
3544 /* we found the guy */
3545 if (asoc->numnets < 2) {
3546 /* Must have at LEAST two remote addresses */
3547 return (-1);
3548 } else {
3549 sctp_remove_net(stcb, net);
3550 return (0);
3551 }
3552 }
3553 }
3554 /* not found. */
3555 return (-2);
3556}
3557
3558
3559void
3560sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3561{
3562 struct sctpvtaghead *chain;
3563 struct sctp_tagblock *twait_block;
3564 struct timeval now;
3565 int set, i;
3566
3567 (void)SCTP_GETTIME_TIMEVAL(&now);
3568 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3569 set = 0;
3570 if (!SCTP_LIST_EMPTY(chain)) {
3571 /* Block(s) present, lets find space, and expire on the fly */
3572 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3573 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3574 if ((twait_block->vtag_block[i].v_tag == 0) &&
3575 !set) {
3576 twait_block->vtag_block[i].tv_sec_at_expire =
3577 now.tv_sec + time;
3578 twait_block->vtag_block[i].v_tag = tag;
3579 set = 1;
3580 } else if ((twait_block->vtag_block[i].v_tag) &&
3581 ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3582 now.tv_sec)) {
3583 /* Audit expires this guy */
3584 twait_block->vtag_block[i].tv_sec_at_expire = 0;
3585 twait_block->vtag_block[i].v_tag = 0;
3586 if (set == 0) {
3587 /* Reuse it for my new tag */
3588 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3589 twait_block->vtag_block[0].v_tag = tag;
3590 set = 1;
3591 }
3592 }
3593 }
3594 if (set) {
3595 /*
3596 * We only do up to the block where we can
3597 * place our tag for audits
3598 */
3599 break;
3600 }
3601 }
3602 }
3603 /* Need to add a new block to chain */
3604 if (!set) {
3605 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3606 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
3607 if (twait_block == NULL) {
3608 return;
3609 }
3610 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3611 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3612 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3613 SCTP_TIME_WAIT;
3614 twait_block->vtag_block[0].v_tag = tag;
3615 }
3616}
3617
3618
3619static void
3620sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3621{
3622 struct sctp_iterator *it;
3623
3624 /*
3625 * Unlock the tcb lock we do this so we avoid a dead lock scenario
3626 * where the iterator is waiting on the TCB lock and the TCB lock is
3627 * waiting on the iterator lock.
3628 */
3629 it = stcb->asoc.stcb_starting_point_for_iterator;
3630 if (it == NULL) {
3631 return;
3632 }
3633 if (it->inp != stcb->sctp_ep) {
3634 /* hmm, focused on the wrong one? */
3635 return;
3636 }
3637 if (it->stcb != stcb) {
3638 return;
3639 }
3640 it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3641 if (it->stcb == NULL) {
3642 /* done with all asoc's in this assoc */
3643 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3644 it->inp = NULL;
3645 } else {
3646 it->inp = LIST_NEXT(inp, sctp_list);
3647 }
3648 }
3649}
3650
3651
3652/*
3653 * Free the association after un-hashing the remote port.
3654 */
3655int
3656sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3657{
3658 int i;
3659 struct sctp_association *asoc;
3660 struct sctp_nets *net, *prev;
3661 struct sctp_laddr *laddr;
3662 struct sctp_tmit_chunk *chk;
3663 struct sctp_asconf_addr *aparam;
3664 struct sctp_stream_reset_list *liste;
3665 struct sctp_queued_to_read *sq;
3666 struct sctp_stream_queue_pending *sp;
3667 sctp_sharedkey_t *shared_key;
3668 struct socket *so;
3669 int ccnt = 0;
3670 int cnt = 0;
3671
3672 /* first, lets purge the entry from the hash table. */
3673
3674#ifdef SCTP_LOG_CLOSING
3675 sctp_log_closing(inp, stcb, 6);
3676#endif
3677 if (stcb->asoc.state == 0) {
3678#ifdef SCTP_LOG_CLOSING
3679 sctp_log_closing(inp, NULL, 7);
3680#endif
3681 /* there is no asoc, really TSNH :-0 */
3682 return (1);
3683 }
3684 /* TEMP CODE */
3685 if (stcb->freed_from_where == 0) {
3686 /* Only record the first place free happened from */
3687 stcb->freed_from_where = from_location;
3688 }
3689 /* TEMP CODE */
3690
3691 asoc = &stcb->asoc;
3692 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3693 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3694 /* nothing around */
3695 so = NULL;
3696 else
3697 so = inp->sctp_socket;
3698
3699 /*
3700 * We used timer based freeing if a reader or writer is in the way.
3701 * So we first check if we are actually being called from a timer,
3702 * if so we abort early if a reader or writer is still in the way.
3703 */
3704 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3705 (from_inpcbfree == SCTP_NORMAL_PROC)) {
3706 /*
3707 * is it the timer driving us? if so are the reader/writers
3708 * gone?
3709 */
3710 if (stcb->asoc.refcnt) {
3711 /* nope, reader or writer in the way */
3712 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3713 /* no asoc destroyed */
3714 SCTP_TCB_UNLOCK(stcb);
3715#ifdef SCTP_LOG_CLOSING
3716 sctp_log_closing(inp, stcb, 8);
3717#endif
3718 return (0);
3719 }
3720 }
3721 /* now clean up any other timers */
3722 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3723 asoc->hb_timer.self = NULL;
3724 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3725 asoc->dack_timer.self = NULL;
3726 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3727 /*-
3728 * For stream reset we don't blast this unless
3729 * it is a str-reset timer, it might be the
3730 * free-asoc timer which we DON'T want to
3731 * disturb.
3732 */
3733 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
3734 asoc->strreset_timer.self = NULL;
3735 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3736 asoc->asconf_timer.self = NULL;
3737 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3738 asoc->autoclose_timer.self = NULL;
3739 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3740 asoc->shut_guard_timer.self = NULL;
3741 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3742 asoc->delayed_event_timer.self = NULL;
3743 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3744 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3745 net->fr_timer.self = NULL;
3746 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3747 net->rxt_timer.self = NULL;
3748 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3749 net->pmtu_timer.self = NULL;
3750 }
3751 /* Now the read queue needs to be cleaned up (only once) */
3752 cnt = 0;
3753 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3754 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3755 SCTP_INP_READ_LOCK(inp);
3756 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3757 if (sq->stcb == stcb) {
3758 sq->do_not_ref_stcb = 1;
3759 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3760 /*
3761 * If there is no end, there never will be
3762 * now.
3763 */
3764 if (sq->end_added == 0) {
3765 /* Held for PD-API clear that. */
3766 sq->pdapi_aborted = 1;
3767 sq->held_length = 0;
3768 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3769 /*
3770 * Need to add a PD-API
3771 * aborted indication.
3772 * Setting the control_pdapi
3773 * assures that it will be
3774 * added right after this
3775 * msg.
3776 */
3777 uint32_t strseq;
3778
3779 stcb->asoc.control_pdapi = sq;
3780 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
3781 sctp_notify_partial_delivery_indication(stcb,
3782 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
3783 stcb->asoc.control_pdapi = NULL;
3784 }
3785 }
3786 /* Add an end to wake them */
3787 sq->end_added = 1;
3788 cnt++;
3789 }
3790 }
3791 SCTP_INP_READ_UNLOCK(inp);
3792 if (stcb->block_entry) {
3793 cnt++;
3794 stcb->block_entry->error = ECONNRESET;
3795 stcb->block_entry = NULL;
3796 }
3797 }
3798 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3799 /*
3800 * reader or writer in the way, we have hopefully given him
3801 * something to chew on above.
3802 */
3803 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3804 SCTP_TCB_UNLOCK(stcb);
3805 if (so) {
3806 SCTP_INP_RLOCK(inp);
3807 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3809 /* nothing around */
3810 so = NULL;
3811 if (so) {
3812 /* Wake any reader/writers */
3813 sctp_sorwakeup(inp, so);
3814 sctp_sowwakeup(inp, so);
3815 }
3816 SCTP_INP_RUNLOCK(inp);
3817
3818 }
3819#ifdef SCTP_LOG_CLOSING
3820 sctp_log_closing(inp, stcb, 9);
3821#endif
3822 /* no asoc destroyed */
3823 return (0);
3824 }
3825#ifdef SCTP_LOG_CLOSING
3826 sctp_log_closing(inp, stcb, 10);
3827#endif
3828 /*
3829 * When I reach here, no others want to kill the assoc yet.. and I
3830 * own the lock. Now its possible an abort comes in when I do the
3831 * lock exchange below to grab all the locks to do the final take
3832 * out. to prevent this we increment the count, which will start a
3833 * timer and blow out above thus assuring us that we hold exclusive
3834 * killing of the asoc. Note that after getting back the TCB lock we
3835 * will go ahead and increment the counter back up and stop any
3836 * timer a passing stranger may have started :-S
3837 */
3838 if (from_inpcbfree == SCTP_NORMAL_PROC) {
3839 atomic_add_int(&stcb->asoc.refcnt, 1);
3840
3841 SCTP_TCB_UNLOCK(stcb);
3842
3843 SCTP_ITERATOR_LOCK();
3844 SCTP_INP_INFO_WLOCK();
3845 SCTP_INP_WLOCK(inp);
3846 SCTP_TCB_LOCK(stcb);
3847 }
3848 /* Double check the GONE flag */
3849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3850 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3851 /* nothing around */
3852 so = NULL;
3853
3854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3855 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3856 /*
3857 * For TCP type we need special handling when we are
3858 * connected. We also include the peel'ed off ones to.
3859 */
3860 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3861 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3862 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3863 if (so) {
3864 SOCK_LOCK(so);
3865 if (so->so_rcv.sb_cc == 0) {
3866 so->so_state &= ~(SS_ISCONNECTING |
3867 SS_ISDISCONNECTING |
3868 SS_ISCONFIRMING |
3869 SS_ISCONNECTED);
3870 }
3871 SOCK_UNLOCK(so);
3872 sctp_sowwakeup(inp, so);
3873 sctp_sorwakeup(inp, so);
3874 SCTP_SOWAKEUP(so);
3875 }
3876 }
3877 }
3878 /*
3879 * Make it invalid too, that way if its about to run it will abort
3880 * and return.
3881 */
3882 sctp_iterator_asoc_being_freed(inp, stcb);
3883 /* re-increment the lock */
3884 if (from_inpcbfree == SCTP_NORMAL_PROC) {
3885 atomic_add_int(&stcb->asoc.refcnt, -1);
3886 }
3887 asoc->state = 0;
3888 if (inp->sctp_tcbhash) {
3889 LIST_REMOVE(stcb, sctp_tcbhash);
3890 }
3891 if (stcb->asoc.in_restart_hash) {
3892 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3893 }
3894 /* Now lets remove it from the list of ALL associations in the EP */
3895 LIST_REMOVE(stcb, sctp_tcblist);
3896 if (from_inpcbfree == SCTP_NORMAL_PROC) {
3897 SCTP_INP_INCR_REF(inp);
3898 SCTP_INP_WUNLOCK(inp);
3899 SCTP_ITERATOR_UNLOCK();
3900 }
3901 /* pull from vtag hash */
3902 LIST_REMOVE(stcb, sctp_asocs);
3903 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3904
3905
3906 /*
3907 * Now restop the timers to be sure - this is paranoia at is finest!
3908 */
3909 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3910 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3911 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3912 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3913 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3914 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3915 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3916 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3917
3918 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3919 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3920 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3921 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3922 }
3923
3924 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3925 prev = NULL;
3926 /*
3927 * The chunk lists and such SHOULD be empty but we check them just
3928 * in case.
3929 */
3930 /* anything on the wheel needs to be removed */
3931 for (i = 0; i < asoc->streamoutcnt; i++) {
3932 struct sctp_stream_out *outs;
3933
3934 outs = &asoc->strmout[i];
3935 /* now clean up any chunks here */
3936 sp = TAILQ_FIRST(&outs->outqueue);
3937 while (sp) {
3938 TAILQ_REMOVE(&outs->outqueue, sp, next);
3939 if (sp->data) {
3940 sctp_m_freem(sp->data);
3941 sp->data = NULL;
3942 sp->tail_mbuf = NULL;
3943 }
3944 sctp_free_remote_addr(sp->net);
3945 sctp_free_spbufspace(stcb, asoc, sp);
3946 /* Free the zone stuff */
3947 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3948 SCTP_DECR_STRMOQ_COUNT();
3949 /* sa_ignore FREED_MEMORY */
3950 sp = TAILQ_FIRST(&outs->outqueue);
3951 }
3952 }
3953
3954 /* sa_ignore FREED_MEMORY */
3955 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3956 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3957 SCTP_FREE(liste, SCTP_M_STRESET);
3958 }
3959
3960 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3961 while (sq) {
3962 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3963 if (sq->data) {
3964 sctp_m_freem(sq->data);
3965 sq->data = NULL;
3966 }
3967 sctp_free_remote_addr(sq->whoFrom);
3968 sq->whoFrom = NULL;
3969 sq->stcb = NULL;
3970 /* Free the ctl entry */
3971 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3972 SCTP_DECR_READQ_COUNT();
3973 /* sa_ignore FREED_MEMORY */
3974 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3975 }
3976
3977 chk = TAILQ_FIRST(&asoc->free_chunks);
3978 while (chk) {
3979 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3980 if (chk->data) {
3981 sctp_m_freem(chk->data);
3982 chk->data = NULL;
3983 }
3984 ccnt++;
3985 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3986 SCTP_DECR_CHK_COUNT();
3987 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3988 asoc->free_chunk_cnt--;
3989 /* sa_ignore FREED_MEMORY */
3990 chk = TAILQ_FIRST(&asoc->free_chunks);
3991 }
3992 /* pending send queue SHOULD be empty */
3993 if (!TAILQ_EMPTY(&asoc->send_queue)) {
3994 chk = TAILQ_FIRST(&asoc->send_queue);
3995 while (chk) {
3996 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3997 if (chk->data) {
3998 sctp_m_freem(chk->data);
3999 chk->data = NULL;
4000 }
4001 ccnt++;
4002 sctp_free_remote_addr(chk->whoTo);
4003 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4004 SCTP_DECR_CHK_COUNT();
4005 /* sa_ignore FREED_MEMORY */
4006 chk = TAILQ_FIRST(&asoc->send_queue);
4007 }
4008 }
4009/*
4010 if(ccnt) {
4011 printf("Freed %d from send_queue\n", ccnt);
4012 ccnt = 0;
4013 }
4014*/
4015 /* sent queue SHOULD be empty */
4016 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4017 chk = TAILQ_FIRST(&asoc->sent_queue);
4018 while (chk) {
4019 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4020 if (chk->data) {
4021 sctp_m_freem(chk->data);
4022 chk->data = NULL;
4023 }
4024 ccnt++;
4025 sctp_free_remote_addr(chk->whoTo);
4026 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4027 SCTP_DECR_CHK_COUNT();
4028 /* sa_ignore FREED_MEMORY */
4029 chk = TAILQ_FIRST(&asoc->sent_queue);
4030 }
4031 }
4032/*
4033 if(ccnt) {
4034 printf("Freed %d from sent_queue\n", ccnt);
4035 ccnt = 0;
4036 }
4037*/
4038 /* control queue MAY not be empty */
4039 if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4040 chk = TAILQ_FIRST(&asoc->control_send_queue);
4041 while (chk) {
4042 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4043 if (chk->data) {
4044 sctp_m_freem(chk->data);
4045 chk->data = NULL;
4046 }
4047 ccnt++;
4048 sctp_free_remote_addr(chk->whoTo);
4049 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4050 SCTP_DECR_CHK_COUNT();
4051 /* sa_ignore FREED_MEMORY */
4052 chk = TAILQ_FIRST(&asoc->control_send_queue);
4053 }
4054 }
4055/*
4056 if(ccnt) {
4057 printf("Freed %d from ctrl_queue\n", ccnt);
4058 ccnt = 0;
4059 }
4060*/
4061 if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4062 chk = TAILQ_FIRST(&asoc->reasmqueue);
4063 while (chk) {
4064 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4065 if (chk->data) {
4066 sctp_m_freem(chk->data);
4067 chk->data = NULL;
4068 }
4069 sctp_free_remote_addr(chk->whoTo);
4070 ccnt++;
4071 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4072 SCTP_DECR_CHK_COUNT();
4073 /* sa_ignore FREED_MEMORY */
4074 chk = TAILQ_FIRST(&asoc->reasmqueue);
4075 }
4076 }
4077/*
4078 if(ccnt) {
4079 printf("Freed %d from reasm_queue\n", ccnt);
4080 ccnt = 0;
4081 }
4082*/
4083 if (asoc->mapping_array) {
4084 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4085 asoc->mapping_array = NULL;
4086 }
4087 /* the stream outs */
4088 if (asoc->strmout) {
4089 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4090 asoc->strmout = NULL;
4091 }
4092 asoc->streamoutcnt = 0;
4093 if (asoc->strmin) {
4094 struct sctp_queued_to_read *ctl;
4095
4096 for (i = 0; i < asoc->streamincnt; i++) {
4097 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4098 /* We have somethings on the streamin queue */
4099 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4100 while (ctl) {
4101 TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4102 ctl, next);
4103 sctp_free_remote_addr(ctl->whoFrom);
4104 if (ctl->data) {
4105 sctp_m_freem(ctl->data);
4106 ctl->data = NULL;
4107 }
4108 /*
4109 * We don't free the address here
4110 * since all the net's were freed
4111 * above.
4112 */
4113 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4114 SCTP_DECR_READQ_COUNT();
4115 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4116 }
4117 }
4118 }
4119 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4120 asoc->strmin = NULL;
4121 }
4122 asoc->streamincnt = 0;
4123 while (!TAILQ_EMPTY(&asoc->nets)) {
4124 /* sa_ignore FREED_MEMORY */
4125 net = TAILQ_FIRST(&asoc->nets);
4126 /* pull from list */
4127 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4128#ifdef INVARIANTS
4129 panic("no net's left alloc'ed, or list points to itself");
4130#endif
4131 break;
4132 }
4133 prev = net;
4134 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4135 sctp_free_remote_addr(net);
4136 }
4137
4138 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4139 /* sa_ignore FREED_MEMORY */
4140 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4141 sctp_remove_laddr(laddr);
4142 }
4143
4144 /* pending asconf (address) parameters */
4145 while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4146 /* sa_ignore FREED_MEMORY */
4147 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4148 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4149 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4150 }
4151 if (asoc->last_asconf_ack_sent != NULL) {
4152 sctp_m_freem(asoc->last_asconf_ack_sent);
4153 asoc->last_asconf_ack_sent = NULL;
4154 }
4155 /* clean up auth stuff */
4156 if (asoc->local_hmacs)
4157 sctp_free_hmaclist(asoc->local_hmacs);
4158 if (asoc->peer_hmacs)
4159 sctp_free_hmaclist(asoc->peer_hmacs);
4160
4161 if (asoc->local_auth_chunks)
4162 sctp_free_chunklist(asoc->local_auth_chunks);
4163 if (asoc->peer_auth_chunks)
4164 sctp_free_chunklist(asoc->peer_auth_chunks);
4165
4166 sctp_free_authinfo(&asoc->authinfo);
4167
4168 shared_key = LIST_FIRST(&asoc->shared_keys);
4169 while (shared_key) {
4170 LIST_REMOVE(shared_key, next);
4171 sctp_free_sharedkey(shared_key);
4172 /* sa_ignore FREED_MEMORY */
4173 shared_key = LIST_FIRST(&asoc->shared_keys);
4174 }
4175
4176 /* Insert new items here :> */
4177
4178 /* Get rid of LOCK */
4179 SCTP_TCB_LOCK_DESTROY(stcb);
4180 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4181 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4182 SCTP_INP_INFO_WUNLOCK();
4183 SCTP_INP_RLOCK(inp);
4184 }
4185#ifdef SCTP_TRACK_FREED_ASOCS
4186 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4187 /* now clean up the tasoc itself */
4188 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4189 SCTP_DECR_ASOC_COUNT();
4190 } else {
4191 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4192 }
4193#else
4194 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4195 SCTP_DECR_ASOC_COUNT();
4196#endif
4197 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4198 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4199 /*
4200 * If its NOT the inp_free calling us AND sctp_close
4201 * as been called, we call back...
4202 */
4203 SCTP_INP_RUNLOCK(inp);
4204 /*
4205 * This will start the kill timer (if we are the
4206 * lastone) since we hold an increment yet. But this
4207 * is the only safe way to do this since otherwise
4208 * if the socket closes at the same time we are here
4209 * we might collide in the cleanup.
4210 */
4211 sctp_inpcb_free(inp,
4212 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4213 SCTP_CALLED_DIRECTLY_NOCMPSET);
4214 SCTP_INP_DECR_REF(inp);
4215 goto out_of;
4216 } else {
4217 /* The socket is still open. */
4218 SCTP_INP_DECR_REF(inp);
4219 }
4220 }
4221 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4222 SCTP_INP_RUNLOCK(inp);
4223 }
4224out_of:
4225 /* destroyed the asoc */
4226#ifdef SCTP_LOG_CLOSING
4227 sctp_log_closing(inp, NULL, 11);
4228#endif
4229 return (1);
4230}
4231
4232
4233
4234/*
4235 * determine if a destination is "reachable" based upon the addresses bound
4236 * to the current endpoint (e.g. only v4 or v6 currently bound)
4237 */
4238/*
4239 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4240 * assoc level v4/v6 flags, as the assoc *may* not have the same address
4241 * types bound as its endpoint
4242 */
4243int
4244sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4245{
4246 struct sctp_inpcb *inp;
4247 int answer;
4248
4249 /*
4250 * No locks here, the TCB, in all cases is already locked and an
4251 * assoc is up. There is either a INP lock by the caller applied (in
4252 * asconf case when deleting an address) or NOT in the HB case,
4253 * however if HB then the INP increment is up and the INP will not
4254 * be removed (on top of the fact that we have a TCB lock). So we
4255 * only want to read the sctp_flags, which is either bound-all or
4256 * not.. no protection needed since once an assoc is up you can't be
4257 * changing your binding.
4258 */
4259 inp = stcb->sctp_ep;
4260 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4261 /* if bound all, destination is not restricted */
4262 /*
4263 * RRS: Question during lock work: Is this correct? If you
4264 * are bound-all you still might need to obey the V4--V6
4265 * flags??? IMO this bound-all stuff needs to be removed!
4266 */
4267 return (1);
4268 }
4269 /* NOTE: all "scope" checks are done when local addresses are added */
4270 if (destaddr->sa_family == AF_INET6) {
4271 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4272 } else if (destaddr->sa_family == AF_INET) {
4273 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4274 } else {
4275 /* invalid family, so it's unreachable */
4276 answer = 0;
4277 }
4278 return (answer);
4279}
4280
4281/*
4282 * update the inp_vflags on an endpoint
4283 */
4284static void
4285sctp_update_ep_vflag(struct sctp_inpcb *inp)
4286{
4287 struct sctp_laddr *laddr;
4288
4289 /* first clear the flag */
4290 inp->ip_inp.inp.inp_vflag = 0;
4291 /* set the flag based on addresses on the ep list */
4292 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4293 if (laddr->ifa == NULL) {
4294 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4295 __FUNCTION__);
4296 continue;
4297 }
4298 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4299 continue;
4300 }
4301 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4302 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4303 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4304 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4305 }
4306 }
4307}
4308
4309/*
4310 * Add the address to the endpoint local address list There is nothing to be
4311 * done if we are bound to all addresses
4312 */
4313void
4314sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4315{
4316 struct sctp_laddr *laddr;
4317 int fnd, error = 0;
4318
4319 fnd = 0;
4320
4321 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4322 /* You are already bound to all. You have it already */
4323 return;
4324 }
4325 if (ifa->address.sa.sa_family == AF_INET6) {
4326 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4327 /* Can't bind a non-useable addr. */
4328 return;
4329 }
4330 }
4331 /* first, is it already present? */
4332 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4333 if (laddr->ifa == ifa) {
4334 fnd = 1;
4335 break;
4336 }
4337 }
4338
4339 if (fnd == 0) {
4340 /* Not in the ep list */
4341 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4342 if (error != 0)
4343 return;
4344 inp->laddr_count++;
4345 /* update inp_vflag flags */
4346 if (ifa->address.sa.sa_family == AF_INET6) {
4347 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4348 } else if (ifa->address.sa.sa_family == AF_INET) {
4349 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4350 }
4351 }
4352 return;
4353}
4354
4355
4356/*
4357 * select a new (hopefully reachable) destination net (should only be used
4358 * when we deleted an ep addr that is the only usable source address to reach
4359 * the destination net)
4360 */
4361static void
4362sctp_select_primary_destination(struct sctp_tcb *stcb)
4363{
4364 struct sctp_nets *net;
4365
4366 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4367 /* for now, we'll just pick the first reachable one we find */
4368 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4369 continue;
4370 if (sctp_destination_is_reachable(stcb,
4371 (struct sockaddr *)&net->ro._l_addr)) {
4372 /* found a reachable destination */
4373 stcb->asoc.primary_destination = net;
4374 }
4375 }
4376 /* I can't there from here! ...we're gonna die shortly... */
4377}
4378
4379
4380/*
4381 * Delete the address from the endpoint local address list There is nothing
4382 * to be done if we are bound to all addresses
4383 */
4384void
4385sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4386{
4387 struct sctp_laddr *laddr;
4388 int fnd;
4389
4390 fnd = 0;
4391 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4392 /* You are already bound to all. You have it already */
4393 return;
4394 }
4395 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4396 if (laddr->ifa == ifa) {
4397 fnd = 1;
4398 break;
4399 }
4400 }
4401 if (fnd && (inp->laddr_count < 2)) {
4402 /* can't delete unless there are at LEAST 2 addresses */
4403 return;
4404 }
4405 if (fnd) {
4406 /*
4407 * clean up any use of this address go through our
4408 * associations and clear any last_used_address that match
4409 * this one for each assoc, see if a new primary_destination
4410 * is needed
4411 */
4412 struct sctp_tcb *stcb;
4413
4414 /* clean up "next_addr_touse" */
4415 if (inp->next_addr_touse == laddr)
4416 /* delete this address */
4417 inp->next_addr_touse = NULL;
4418
4419 /* clean up "last_used_address" */
4420 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4421 struct sctp_nets *net;
4422
4423 SCTP_TCB_LOCK(stcb);
4424 if (stcb->asoc.last_used_address == laddr)
4425 /* delete this address */
4426 stcb->asoc.last_used_address = NULL;
4427 /*
4428 * Now spin through all the nets and purge any ref
4429 * to laddr
4430 */
4431 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4432 if (net->ro._s_addr &&
4433 (net->ro._s_addr->ifa == laddr->ifa)) {
4434 /* Yep, purge src address selected */
4435 sctp_rtentry_t *rt;
4436
4437 /* delete this address if cached */
4438 rt = net->ro.ro_rt;
4439 if (rt != NULL) {
4440 RTFREE(rt);
4441 net->ro.ro_rt = NULL;
4442 }
4443 sctp_free_ifa(net->ro._s_addr);
4444 net->ro._s_addr = NULL;
4445 net->src_addr_selected = 0;
4446 }
4447 }
4448 SCTP_TCB_UNLOCK(stcb);
4449 } /* for each tcb */
4450 /* remove it from the ep list */
4451 sctp_remove_laddr(laddr);
4452 inp->laddr_count--;
4453 /* update inp_vflag flags */
4454 sctp_update_ep_vflag(inp);
4455 }
4456 return;
4457}
4458
4459/*
4460 * Add the addr to the TCB local address list For the BOUNDALL or dynamic
4461 * case, this is a "pending" address list (eg. addresses waiting for an
4462 * ASCONF-ACK response) For the subset binding, static case, this is a
4463 * "valid" address list
4464 */
4465void
4466sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list)
4467{
4468 struct sctp_inpcb *inp;
4469 struct sctp_laddr *laddr;
4470 struct sctpladdr *list;
4471
4472 /*
4473 * Assumes TCB is locked.. and possibly the INP. May need to
4474 * confirm/fix that if we need it and is not the case.
4475 */
4476 list = &stcb->asoc.sctp_restricted_addrs;
4477
4478 inp = stcb->sctp_ep;
4479 if (ifa->address.sa.sa_family == AF_INET6) {
4480 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4481 /* Can't bind a non-existent addr. */
4482 return;
4483 }
4484 }
4485 /* does the address already exist? */
4486 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4487 if (laddr->ifa == ifa) {
4488 return;
4489 }
4490 }
4491
4492 /* add to the list */
4493 (void)sctp_insert_laddr(list, ifa, 0);
4494 return;
4495}
4496
4497/*
4498 * insert an laddr entry with the given ifa for the desired list
4499 */
4500int
4501sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4502{
4503 struct sctp_laddr *laddr;
4504
4505 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4506 if (laddr == NULL) {
4507 /* out of memory? */
4508 return (EINVAL);
4509 }
4510 SCTP_INCR_LADDR_COUNT();
4511 bzero(laddr, sizeof(*laddr));
4512 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4513 laddr->ifa = ifa;
4514 laddr->action = act;
4515 atomic_add_int(&ifa->refcount, 1);
4516 /* insert it */
4517 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4518
4519 return (0);
4520}
4521
4522/*
4523 * Remove an laddr entry from the local address list (on an assoc)
4524 */
4525void
4526sctp_remove_laddr(struct sctp_laddr *laddr)
4527{
4528
4529 /* remove from the list */
4530 LIST_REMOVE(laddr, sctp_nxt_addr);
4531 sctp_free_ifa(laddr->ifa);
4532 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4533 SCTP_DECR_LADDR_COUNT();
4534}
4535
4536/*
4537 * Remove an address from the TCB local address list
4538 */
4539void
4540sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4541{
4542 struct sctp_inpcb *inp;
4543 struct sctp_laddr *laddr;
4544
4545 /*
4546 * This is called by asconf work. It is assumed that a) The TCB is
4547 * locked and b) The INP is locked. This is true in as much as I can
4548 * trace through the entry asconf code where I did these locks.
4549 * Again, the ASCONF code is a bit different in that it does lock
4550 * the INP during its work often times. This must be since we don't
4551 * want other proc's looking up things while what they are looking
4552 * up is changing :-D
4553 */
4554
4555 inp = stcb->sctp_ep;
4556 /* if subset bound and don't allow ASCONF's, can't delete last */
4557 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4558 (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4559 if (stcb->asoc.numnets < 2) {
4560 /* can't delete last address */
4561 return;
4562 }
4563 }
4564 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4565 /* remove the address if it exists */
4566 if (laddr->ifa == NULL)
4567 continue;
4568 if (laddr->ifa == ifa) {
4569 sctp_remove_laddr(laddr);
4570 return;
4571 }
4572 }
4573
4574 /* address not found! */
4575 return;
4576}
4577
4578static char sctp_pcb_initialized = 0;
4579
4580/*
4581 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4582 */
4583/* sysctl */
4584static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4585static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4586
4587void
4588sctp_pcb_init()
4589{
4590 /*
4591 * SCTP initialization for the PCB structures should be called by
4592 * the sctp_init() funciton.
4593 */
4594 int i;
4595
4596 if (sctp_pcb_initialized != 0) {
4597 /* error I was called twice */
4598 return;
4599 }
4600 sctp_pcb_initialized = 1;
4601
4602 bzero(&sctpstat, sizeof(struct sctpstat));
4603 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4604 /* init the empty list of (All) Endpoints */
4605 LIST_INIT(&sctppcbinfo.listhead);
4606
4607 /* init the iterator head */
4608 TAILQ_INIT(&sctppcbinfo.iteratorhead);
4609
4610 /* init the hash table of endpoints */
4611 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4612 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4613 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4614 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4615 &sctppcbinfo.hashasocmark);
4616 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4617 &sctppcbinfo.hashmark);
4618 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4619 &sctppcbinfo.hashtcpmark);
4620 sctppcbinfo.hashtblsize = sctp_hashtblsize;
4621
4622 /* init the small hash table we use to track restarted asoc's */
4623 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4624 &sctppcbinfo.hashrestartmark);
4625
4626
4627 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4628 &sctppcbinfo.hashvrfmark);
4629
4630 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
4631 &sctppcbinfo.vrf_ifn_hashmark);
4632
4633 /* init the zones */
4634 /*
4635 * FIX ME: Should check for NULL returns, but if it does fail we are
4636 * doomed to panic anyways... add later maybe.
4637 */
4638 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4639 sizeof(struct sctp_inpcb), maxsockets);
4640
4641 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4642 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4643
4644 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4645 sizeof(struct sctp_laddr),
4646 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4647
4648 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4649 sizeof(struct sctp_nets),
4650 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4651
4652 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4653 sizeof(struct sctp_tmit_chunk),
4654 (sctp_max_number_of_assoc * sctp_chunkscale));
4655
4656 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4657 sizeof(struct sctp_queued_to_read),
4658 (sctp_max_number_of_assoc * sctp_chunkscale));
4659
4660 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4661 sizeof(struct sctp_stream_queue_pending),
4662 (sctp_max_number_of_assoc * sctp_chunkscale));
4663
4664 /* Master Lock INIT for info structure */
4665 SCTP_INP_INFO_LOCK_INIT();
4666 SCTP_STATLOG_INIT_LOCK();
4667 SCTP_ITERATOR_LOCK_INIT();
4668
4669 SCTP_IPI_COUNT_INIT();
4670 SCTP_IPI_ADDR_INIT();
4671 SCTP_IPI_ITERATOR_WQ_INIT();
4672#ifdef SCTP_PACKET_LOGGING
4673 SCTP_IP_PKTLOG_INIT();
4674#endif
4675 LIST_INIT(&sctppcbinfo.addr_wq);
4676
4677 /* not sure if we need all the counts */
4678 sctppcbinfo.ipi_count_ep = 0;
4679 /* assoc/tcb zone info */
4680 sctppcbinfo.ipi_count_asoc = 0;
4681 /* local addrlist zone info */
4682 sctppcbinfo.ipi_count_laddr = 0;
4683 /* remote addrlist zone info */
4684 sctppcbinfo.ipi_count_raddr = 0;
4685 /* chunk info */
4686 sctppcbinfo.ipi_count_chunk = 0;
4687
4688 /* socket queue zone info */
4689 sctppcbinfo.ipi_count_readq = 0;
4690
4691 /* stream out queue cont */
4692 sctppcbinfo.ipi_count_strmoq = 0;
4693
4694 sctppcbinfo.ipi_free_strmoq = 0;
4695 sctppcbinfo.ipi_free_chunks = 0;
4696
4697 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4698
4699 /* Init the TIMEWAIT list */
4700 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
4701 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4702 }
4703
4704#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4705 sctppcbinfo.iterator_running = 0;
4706 sctp_startup_iterator();
4707#endif
4708
4709 /*
4710 * INIT the default VRF which for BSD is the only one, other O/S's
4711 * may have more. But initially they must start with one and then
4712 * add the VRF's as addresses are added.
4713 */
4714 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4715
4716}
4717
4718
4719int
4720sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4721 int iphlen, int offset, int limit, struct sctphdr *sh,
4722 struct sockaddr *altsa)
4723{
4724 /*
4725 * grub through the INIT pulling addresses and loading them to the
4726 * nets structure in the asoc. The from address in the mbuf should
4727 * also be loaded (if it is not already). This routine can be called
4728 * with either INIT or INIT-ACK's as long as the m points to the IP
4729 * packet and the offset points to the beginning of the parameters.
4730 */
4731 struct sctp_inpcb *inp, *l_inp;
4732 struct sctp_nets *net, *net_tmp;
4733 struct ip *iph;
4734 struct sctp_paramhdr *phdr, parm_buf;
4735 struct sctp_tcb *stcb_tmp;
4736 uint16_t ptype, plen;
4737 struct sockaddr *sa;
4738 struct sockaddr_storage dest_store;
4739 struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4740 struct sockaddr_in sin;
4741 struct sockaddr_in6 sin6;
4742 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4743 struct sctp_auth_random *p_random = NULL;
4744 uint16_t random_len = 0;
4745 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4746 struct sctp_auth_hmac_algo *hmacs = NULL;
4747 uint16_t hmacs_len = 0;
4748 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4749 struct sctp_auth_chunk_list *chunks = NULL;
4750 uint16_t num_chunks = 0;
4751 sctp_key_t *new_key;
4752 uint32_t keylen;
4753 int got_random = 0, got_hmacs = 0, got_chklist = 0;
4754
4755 /* First get the destination address setup too. */
4756 memset(&sin, 0, sizeof(sin));
4757 memset(&sin6, 0, sizeof(sin6));
4758
4759 sin.sin_family = AF_INET;
4760 sin.sin_len = sizeof(sin);
4761 sin.sin_port = stcb->rport;
4762
4763 sin6.sin6_family = AF_INET6;
4764 sin6.sin6_len = sizeof(struct sockaddr_in6);
4765 sin6.sin6_port = stcb->rport;
4766 if (altsa == NULL) {
4767 iph = mtod(m, struct ip *);
4768 if (iph->ip_v == IPVERSION) {
4769 /* its IPv4 */
4770 struct sockaddr_in *sin_2;
4771
4772 sin_2 = (struct sockaddr_in *)(local_sa);
4773 memset(sin_2, 0, sizeof(sin));
4774 sin_2->sin_family = AF_INET;
4775 sin_2->sin_len = sizeof(sin);
4776 sin_2->sin_port = sh->dest_port;
4777 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4778 sin.sin_addr = iph->ip_src;
4779 sa = (struct sockaddr *)&sin;
4780 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4781 /* its IPv6 */
4782 struct ip6_hdr *ip6;
4783 struct sockaddr_in6 *sin6_2;
4784
4785 ip6 = mtod(m, struct ip6_hdr *);
4786 sin6_2 = (struct sockaddr_in6 *)(local_sa);
4787 memset(sin6_2, 0, sizeof(sin6));
4788 sin6_2->sin6_family = AF_INET6;
4789 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4790 sin6_2->sin6_port = sh->dest_port;
4791 sin6.sin6_addr = ip6->ip6_src;
4792 sa = (struct sockaddr *)&sin6;
4793 } else {
4794 sa = NULL;
4795 }
4796 } else {
4797 /*
4798 * For cookies we use the src address NOT from the packet
4799 * but from the original INIT
4800 */
4801 sa = altsa;
4802 }
4803 /* Turn off ECN until we get through all params */
4804 stcb->asoc.ecn_allowed = 0;
4805 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4806 /* mark all addresses that we have currently on the list */
4807 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4808 }
4809 /* does the source address already exist? if so skip it */
4810 l_inp = inp = stcb->sctp_ep;
4811
4812 atomic_add_int(&stcb->asoc.refcnt, 1);
4813 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4814 atomic_add_int(&stcb->asoc.refcnt, -1);
4815
4816 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4817 /* we must add the source address */
4818 /* no scope set here since we have a tcb already. */
4819 if ((sa->sa_family == AF_INET) &&
4820 (stcb->asoc.ipv4_addr_legal)) {
4821 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4822 return (-1);
4823 }
4824 } else if ((sa->sa_family == AF_INET6) &&
4825 (stcb->asoc.ipv6_addr_legal)) {
4826 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4827 return (-2);
4828 }
4829 }
4830 } else {
4831 if (net_tmp != NULL && stcb_tmp == stcb) {
4832 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4833 } else if (stcb_tmp != stcb) {
4834 /* It belongs to another association? */
4835 if (stcb_tmp)
4836 SCTP_TCB_UNLOCK(stcb_tmp);
4837 return (-3);
4838 }
4839 }
4840 if (stcb->asoc.state == 0) {
4841 /* the assoc was freed? */
4842 return (-4);
4843 }
4844 /* now we must go through each of the params. */
4845 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4846 while (phdr) {
4847 ptype = ntohs(phdr->param_type);
4848 plen = ntohs(phdr->param_length);
4849 /*
4850 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4851 * (int)plen);
4852 */
4853 if (offset + plen > limit) {
4854 break;
4855 }
4856 if (plen == 0) {
4857 break;
4858 }
4859 if (ptype == SCTP_IPV4_ADDRESS) {
4860 if (stcb->asoc.ipv4_addr_legal) {
4861 struct sctp_ipv4addr_param *p4, p4_buf;
4862
4863 /* ok get the v4 address and check/add */
4864 phdr = sctp_get_next_param(m, offset,
4865 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4866 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4867 phdr == NULL) {
4868 return (-5);
4869 }
4870 p4 = (struct sctp_ipv4addr_param *)phdr;
4871 sin.sin_addr.s_addr = p4->addr;
4872 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
4873 /* Skip multi-cast addresses */
4874 goto next_param;
4875 }
4876 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
4877 (sin.sin_addr.s_addr == INADDR_ANY)) {
4878 goto next_param;
4879 }
4880 sa = (struct sockaddr *)&sin;
4881 inp = stcb->sctp_ep;
4882 atomic_add_int(&stcb->asoc.refcnt, 1);
4883 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4884 local_sa, stcb);
4885 atomic_add_int(&stcb->asoc.refcnt, -1);
4886
4887 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4888 inp == NULL) {
4889 /* we must add the source address */
4890 /*
4891 * no scope set since we have a tcb
4892 * already
4893 */
4894
4895 /*
4896 * we must validate the state again
4897 * here
4898 */
4899 if (stcb->asoc.state == 0) {
4900 /* the assoc was freed? */
4901 return (-7);
4902 }
4903 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4904 return (-8);
4905 }
4906 } else if (stcb_tmp == stcb) {
4907 if (stcb->asoc.state == 0) {
4908 /* the assoc was freed? */
4909 return (-10);
4910 }
4911 if (net != NULL) {
4912 /* clear flag */
4913 net->dest_state &=
4914 ~SCTP_ADDR_NOT_IN_ASSOC;
4915 }
4916 } else {
4917 /*
4918 * strange, address is in another
4919 * assoc? straighten out locks.
4920 */
4921 if (stcb->asoc.state == 0) {
4922 /* the assoc was freed? */
4923 return (-12);
4924 }
4925 return (-13);
4926 }
4927 }
4928 } else if (ptype == SCTP_IPV6_ADDRESS) {
4929 if (stcb->asoc.ipv6_addr_legal) {
4930 /* ok get the v6 address and check/add */
4931 struct sctp_ipv6addr_param *p6, p6_buf;
4932
4933 phdr = sctp_get_next_param(m, offset,
4934 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4935 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4936 phdr == NULL) {
4937 return (-14);
4938 }
4939 p6 = (struct sctp_ipv6addr_param *)phdr;
4940 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4941 sizeof(p6->addr));
4942 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
4943 /* Skip multi-cast addresses */
4944 goto next_param;
4945 }
4946 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
4947 /*
4948 * Link local make no sense without
4949 * scope
4950 */
4951 goto next_param;
4952 }
4953 sa = (struct sockaddr *)&sin6;
4954 inp = stcb->sctp_ep;
4955 atomic_add_int(&stcb->asoc.refcnt, 1);
4956 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4957 local_sa, stcb);
4958 atomic_add_int(&stcb->asoc.refcnt, -1);
4959 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4960 inp == NULL)) {
4961 /*
4962 * we must validate the state again
4963 * here
4964 */
4965 if (stcb->asoc.state == 0) {
4966 /* the assoc was freed? */
4967 return (-16);
4968 }
4969 /*
4970 * we must add the address, no scope
4971 * set
4972 */
4973 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4974 return (-17);
4975 }
4976 } else if (stcb_tmp == stcb) {
4977 /*
4978 * we must validate the state again
4979 * here
4980 */
4981 if (stcb->asoc.state == 0) {
4982 /* the assoc was freed? */
4983 return (-19);
4984 }
4985 if (net != NULL) {
4986 /* clear flag */
4987 net->dest_state &=
4988 ~SCTP_ADDR_NOT_IN_ASSOC;
4989 }
4990 } else {
4991 /*
4992 * strange, address is in another
4993 * assoc? straighten out locks.
4994 */
4995 if (stcb->asoc.state == 0) {
4996 /* the assoc was freed? */
4997 return (-21);
4998 }
4999 return (-22);
5000 }
5001 }
5002 } else if (ptype == SCTP_ECN_CAPABLE) {
5003 stcb->asoc.ecn_allowed = 1;
5004 } else if (ptype == SCTP_ULP_ADAPTATION) {
5005 if (stcb->asoc.state != SCTP_STATE_OPEN) {
5006 struct sctp_adaptation_layer_indication ai,
5007 *aip;
5008
5009 phdr = sctp_get_next_param(m, offset,
5010 (struct sctp_paramhdr *)&ai, sizeof(ai));
5011 aip = (struct sctp_adaptation_layer_indication *)phdr;
5012 if (aip) {
5013 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
5014 stcb, ntohl(aip->indication), NULL);
5015 }
5016 }
5017 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5018 struct sctp_asconf_addr_param lstore, *fee;
5019 struct sctp_asconf_addrv4_param *fii;
5020 int lptype;
5021 struct sockaddr *lsa = NULL;
5022
5023 stcb->asoc.peer_supports_asconf = 1;
5024 if (plen > sizeof(lstore)) {
5025 return (-23);
5026 }
5027 phdr = sctp_get_next_param(m, offset,
5028 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5029 if (phdr == NULL) {
5030 return (-24);
5031 }
5032 fee = (struct sctp_asconf_addr_param *)phdr;
5033 lptype = ntohs(fee->addrp.ph.param_type);
5034 if (lptype == SCTP_IPV4_ADDRESS) {
5035 if (plen !=
5036 sizeof(struct sctp_asconf_addrv4_param)) {
5037 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5038 (int)sizeof(struct sctp_asconf_addrv4_param),
5039 plen);
5040 } else {
5041 fii = (struct sctp_asconf_addrv4_param *)fee;
5042 sin.sin_addr.s_addr = fii->addrp.addr;
5043 lsa = (struct sockaddr *)&sin;
5044 }
5045 } else if (lptype == SCTP_IPV6_ADDRESS) {
5046 if (plen !=
5047 sizeof(struct sctp_asconf_addr_param)) {
5048 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5049 (int)sizeof(struct sctp_asconf_addr_param),
5050 plen);
5051 } else {
5052 memcpy(sin6.sin6_addr.s6_addr,
5053 fee->addrp.addr,
5054 sizeof(fee->addrp.addr));
5055 lsa = (struct sockaddr *)&sin6;
5056 }
5057 }
5058 if (lsa) {
5059 (void)sctp_set_primary_addr(stcb, sa, NULL);
5060 }
5061 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5062 /* Peer supports pr-sctp */
5063 stcb->asoc.peer_supports_prsctp = 1;
5064 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5065 /* A supported extension chunk */
5066 struct sctp_supported_chunk_types_param *pr_supported;
5067 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5068 int num_ent, i;
5069
5070 phdr = sctp_get_next_param(m, offset,
5071 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5072 if (phdr == NULL) {
5073 return (-25);
5074 }
5075 stcb->asoc.peer_supports_asconf = 0;
5076 stcb->asoc.peer_supports_prsctp = 0;
5077 stcb->asoc.peer_supports_pktdrop = 0;
5078 stcb->asoc.peer_supports_strreset = 0;
5079 stcb->asoc.peer_supports_auth = 0;
5080 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5081 num_ent = plen - sizeof(struct sctp_paramhdr);
5082 for (i = 0; i < num_ent; i++) {
5083 switch (pr_supported->chunk_types[i]) {
5084 case SCTP_ASCONF:
5085 case SCTP_ASCONF_ACK:
5086 stcb->asoc.peer_supports_asconf = 1;
5087 break;
5088 case SCTP_FORWARD_CUM_TSN:
5089 stcb->asoc.peer_supports_prsctp = 1;
5090 break;
5091 case SCTP_PACKET_DROPPED:
5092 stcb->asoc.peer_supports_pktdrop = 1;
5093 break;
5094 case SCTP_STREAM_RESET:
5095 stcb->asoc.peer_supports_strreset = 1;
5096 break;
5097 case SCTP_AUTHENTICATION:
5098 stcb->asoc.peer_supports_auth = 1;
5099 break;
5100 default:
5101 /* one I have not learned yet */
5102 break;
5103
5104 }
5105 }
5106 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5107 /* Peer supports ECN-nonce */
5108 stcb->asoc.peer_supports_ecn_nonce = 1;
5109 stcb->asoc.ecn_nonce_allowed = 1;
5110 } else if (ptype == SCTP_RANDOM) {
5111 if (plen > sizeof(random_store))
5112 break;
5113 if (got_random) {
5114 /* already processed a RANDOM */
5115 goto next_param;
5116 }
5117 phdr = sctp_get_next_param(m, offset,
5118 (struct sctp_paramhdr *)random_store,
5119 min(sizeof(random_store), plen));
5120 if (phdr == NULL)
5121 return (-26);
5122 p_random = (struct sctp_auth_random *)phdr;
5123 random_len = plen - sizeof(*p_random);
5124 /* enforce the random length */
5125 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5126 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5127 return (-27);
5128 }
5129 got_random = 1;
5130 } else if (ptype == SCTP_HMAC_LIST) {
5131 int num_hmacs;
5132 int i;
5133
5134 if (plen > sizeof(hmacs_store))
5135 break;
5136 if (got_hmacs) {
5137 /* already processed a HMAC list */
5138 goto next_param;
5139 }
5140 phdr = sctp_get_next_param(m, offset,
5141 (struct sctp_paramhdr *)hmacs_store,
5142 min(plen, sizeof(hmacs_store)));
5143 if (phdr == NULL)
5144 return (-28);
5145 hmacs = (struct sctp_auth_hmac_algo *)phdr;
5146 hmacs_len = plen - sizeof(*hmacs);
5147 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5148 /* validate the hmac list */
5149 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5150 return (-29);
5151 }
5152 if (stcb->asoc.peer_hmacs != NULL)
5153 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5154 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5155 if (stcb->asoc.peer_hmacs != NULL) {
5156 for (i = 0; i < num_hmacs; i++) {
5157 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5158 ntohs(hmacs->hmac_ids[i]));
5159 }
5160 }
5161 got_hmacs = 1;
5162 } else if (ptype == SCTP_CHUNK_LIST) {
5163 int i;
5164
5165 if (plen > sizeof(chunks_store))
5166 break;
5167 if (got_chklist) {
5168 /* already processed a Chunks list */
5169 goto next_param;
5170 }
5171 phdr = sctp_get_next_param(m, offset,
5172 (struct sctp_paramhdr *)chunks_store,
5173 min(plen, sizeof(chunks_store)));
5174 if (phdr == NULL)
5175 return (-30);
5176 chunks = (struct sctp_auth_chunk_list *)phdr;
5177 num_chunks = plen - sizeof(*chunks);
5178 if (stcb->asoc.peer_auth_chunks != NULL)
5179 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5180 else
5181 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5182 for (i = 0; i < num_chunks; i++) {
5183 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5184 stcb->asoc.peer_auth_chunks);
5185 }
5186 got_chklist = 1;
5187 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5188 (ptype == SCTP_STATE_COOKIE) ||
5189 (ptype == SCTP_UNRECOG_PARAM) ||
5190 (ptype == SCTP_COOKIE_PRESERVE) ||
5191 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5192 (ptype == SCTP_ADD_IP_ADDRESS) ||
5193 (ptype == SCTP_DEL_IP_ADDRESS) ||
5194 (ptype == SCTP_ERROR_CAUSE_IND) ||
5195 (ptype == SCTP_SUCCESS_REPORT)) {
5196 /* don't care */ ;
5197 } else {
5198 if ((ptype & 0x8000) == 0x0000) {
5199 /*
5200 * must stop processing the rest of the
5201 * param's. Any report bits were handled
5202 * with the call to
5203 * sctp_arethere_unrecognized_parameters()
5204 * when the INIT or INIT-ACK was first seen.
5205 */
5206 break;
5207 }
5208 }
5209next_param:
5210 offset += SCTP_SIZE32(plen);
5211 if (offset >= limit) {
5212 break;
5213 }
5214 phdr = sctp_get_next_param(m, offset, &parm_buf,
5215 sizeof(parm_buf));
5216 }
5217 /* Now check to see if we need to purge any addresses */
5218 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5219 net_tmp = TAILQ_NEXT(net, sctp_next);
5220 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5221 SCTP_ADDR_NOT_IN_ASSOC) {
5222 /* This address has been removed from the asoc */
5223 /* remove and free it */
5224 stcb->asoc.numnets--;
5225 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5226 sctp_free_remote_addr(net);
5227 if (net == stcb->asoc.primary_destination) {
5228 stcb->asoc.primary_destination = NULL;
5229 sctp_select_primary_destination(stcb);
5230 }
5231 }
5232 }
5233 /* validate authentication required parameters */
5234 if (got_random && got_hmacs) {
5235 stcb->asoc.peer_supports_auth = 1;
5236 } else {
5237 stcb->asoc.peer_supports_auth = 0;
5238 }
5239 if (!stcb->asoc.peer_supports_auth && got_chklist) {
5240 /* peer does not support auth but sent a chunks list? */
5241 return (-31);
5242 }
5243 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5244 !stcb->asoc.peer_supports_auth) {
5245 /* peer supports asconf but not auth? */
5246 return (-32);
5247 }
5248 /* concatenate the full random key */
5249#ifdef SCTP_AUTH_DRAFT_04
5250 keylen = random_len;
5251 new_key = sctp_alloc_key(keylen);
5252 if (new_key != NULL) {
5253 /* copy in the RANDOM */
5254 if (p_random != NULL)
5255 bcopy(p_random->random_data, new_key->key, random_len);
5256 }
5257#else
5258 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5259 sizeof(*hmacs) + hmacs_len;
5260 new_key = sctp_alloc_key(keylen);
5261 if (new_key != NULL) {
5262 /* copy in the RANDOM */
5263 if (p_random != NULL) {
5264 keylen = sizeof(*p_random) + random_len;
5265 bcopy(p_random, new_key->key, keylen);
5266 }
5267 /* append in the AUTH chunks */
5268 if (chunks != NULL) {
5269 bcopy(chunks, new_key->key + keylen,
5270 sizeof(*chunks) + num_chunks);
5271 keylen += sizeof(*chunks) + num_chunks;
5272 }
5273 /* append in the HMACs */
5274 if (hmacs != NULL) {
5275 bcopy(hmacs, new_key->key + keylen,
5276 sizeof(*hmacs) + hmacs_len);
5277 }
5278 }
5279#endif
5280 else {
5281 /* failed to get memory for the key */
5282 return (-33);
5283 }
5284 if (stcb->asoc.authinfo.peer_random != NULL)
5285 sctp_free_key(stcb->asoc.authinfo.peer_random);
5286 stcb->asoc.authinfo.peer_random = new_key;
5287#ifdef SCTP_AUTH_DRAFT_04
5288 /* don't include the chunks and hmacs for draft -04 */
5289 stcb->asoc.authinfo.peer_random->keylen = random_len;
5290#endif
5291 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5292 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5293
5294 return (0);
5295}
5296
5297int
5298sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5299 struct sctp_nets *net)
5300{
5301 /* make sure the requested primary address exists in the assoc */
5302 if (net == NULL && sa)
5303 net = sctp_findnet(stcb, sa);
5304
5305 if (net == NULL) {
5306 /* didn't find the requested primary address! */
5307 return (-1);
5308 } else {
5309 /* set the primary address */
5310 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5311 /* Must be confirmed, so queue to set */
5312 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5313 return (0);
5314 }
5315 stcb->asoc.primary_destination = net;
5316 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5317 net = TAILQ_FIRST(&stcb->asoc.nets);
5318 if (net != stcb->asoc.primary_destination) {
5319 /*
5320 * first one on the list is NOT the primary
5321 * sctp_cmpaddr() is much more efficent if the
5322 * primary is the first on the list, make it so.
5323 */
5324 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5325 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5326 }
5327 return (0);
5328 }
5329}
5330
5331
5332int
5333sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5334{
5335 /*
5336 * This function serves two purposes. It will see if a TAG can be
5337 * re-used and return 1 for yes it is ok and 0 for don't use that
5338 * tag. A secondary function it will do is purge out old tags that
5339 * can be removed.
5340 */
5341 struct sctpasochead *head;
5342 struct sctpvtaghead *chain;
5343 struct sctp_tagblock *twait_block;
5344 struct sctp_tcb *stcb;
5345 int i;
5346
5347 SCTP_INP_INFO_WLOCK();
5348 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5349 /* First is the vtag in use ? */
5350
5351 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5352 sctppcbinfo.hashasocmark)];
5353 if (head == NULL) {
5354 goto check_restart;
5355 }
5356 LIST_FOREACH(stcb, head, sctp_asocs) {
5357
5358 if (stcb->asoc.my_vtag == tag) {
5359 /*
5360 * We should remove this if and return 0 always if
5361 * we want vtags unique across all endpoints. For
5362 * now within a endpoint is ok.
5363 */
5364 if (inp == stcb->sctp_ep) {
5365 /* bad tag, in use */
5366 SCTP_INP_INFO_WUNLOCK();
5367 return (0);
5368 }
5369 }
5370 }
5371check_restart:
5372 /* Now lets check the restart hash */
5373 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5374 sctppcbinfo.hashrestartmark)];
5375 if (head == NULL) {
5376 goto check_time_wait;
5377 }
5378 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5379 if (stcb->asoc.assoc_id == tag) {
5380 /* candidate */
5381 if (inp == stcb->sctp_ep) {
5382 /* bad tag, in use */
5383 SCTP_INP_INFO_WUNLOCK();
5384 return (0);
5385 }
5386 }
5387 }
5388check_time_wait:
5389 /* Now what about timed wait ? */
5390 if (!SCTP_LIST_EMPTY(chain)) {
5391 /*
5392 * Block(s) are present, lets see if we have this tag in the
5393 * list
5394 */
5395 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5396 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5397 if (twait_block->vtag_block[i].v_tag == 0) {
5398 /* not used */
5399 continue;
5400 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5401 now->tv_sec) {
5402 /* Audit expires this guy */
5403 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5404 twait_block->vtag_block[i].v_tag = 0;
5405 } else if (twait_block->vtag_block[i].v_tag ==
5406 tag) {
5407 /* Bad tag, sorry :< */
5408 SCTP_INP_INFO_WUNLOCK();
5409 return (0);
5410 }
5411 }
5412 }
5413 }
5414 /* Not found, ok to use the tag */
5415 SCTP_INP_INFO_WUNLOCK();
5416 return (1);
5417}
5418
5419
5420static sctp_assoc_t reneged_asoc_ids[256];
5421static uint8_t reneged_at = 0;
5422
5423
5424static void
5425sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5426{
5427 /*
5428 * We must hunt this association for MBUF's past the cumack (i.e.
5429 * out of order data that we can renege on).
5430 */
5431 struct sctp_association *asoc;
5432 struct sctp_tmit_chunk *chk, *nchk;
5433 uint32_t cumulative_tsn_p1, tsn;
5434 struct sctp_queued_to_read *ctl, *nctl;
5435 int cnt, strmat, gap;
5436
5437 /* We look for anything larger than the cum-ack + 1 */
5438
5439 SCTP_STAT_INCR(sctps_protocol_drain_calls);
5440 if (sctp_do_drain == 0) {
5441 return;
5442 }
5443 asoc = &stcb->asoc;
5444 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5445 /* none we can reneg on. */
5446 return;
5447 }
5448 SCTP_STAT_INCR(sctps_protocol_drains_done);
5449 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5450 cnt = 0;
5451 /* First look in the re-assembly queue */
5452 chk = TAILQ_FIRST(&asoc->reasmqueue);
5453 while (chk) {
5454 /* Get the next one */
5455 nchk = TAILQ_NEXT(chk, sctp_next);
5456 if (compare_with_wrap(chk->rec.data.TSN_seq,
5457 cumulative_tsn_p1, MAX_TSN)) {
5458 /* Yep it is above cum-ack */
5459 cnt++;
5460 tsn = chk->rec.data.TSN_seq;
5461 if (tsn >= asoc->mapping_array_base_tsn) {
5462 gap = tsn - asoc->mapping_array_base_tsn;
5463 } else {
5464 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5465 tsn + 1;
5466 }
5467 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5468 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5469 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5470 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5471 if (chk->data) {
5472 sctp_m_freem(chk->data);
5473 chk->data = NULL;
5474 }
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