1 /*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/11.0/sys/netinet/sctp_pcb.c 303956 2016-08-11 10:14:03Z tuexen $");
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 #include <netinet/sctp_dtrace_define.h>
49 #if defined(INET) || defined(INET6)
50 #include <netinet/udp.h>
51 #endif
52 #ifdef INET6
53 #include <netinet6/ip6_var.h>
54 #endif
55 #include <sys/sched.h>
56 #include <sys/smp.h>
57 #include <sys/unistd.h>
58
59
60 VNET_DEFINE(struct sctp_base_info, system_base_info);
61
62 /* FIX: we don't handle multiple link local scopes */
63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
64 #ifdef INET6
65 int
66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
67 {
68 struct sockaddr_in6 tmp_a, tmp_b;
69
70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
72 return (0);
73 }
74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
76 return (0);
77 }
78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
79 }
80
81 #endif
82
83 void
84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
85 {
86 /*
87 * We really don't need to lock this, but I will just because it
88 * does not hurt.
89 */
90 SCTP_INP_INFO_RLOCK();
91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
99 SCTP_INP_INFO_RUNLOCK();
100 }
101
102 /*-
103 * Addresses are added to VRF's (Virtual Router's). For BSD we
104 * have only the default VRF 0. We maintain a hash list of
105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
106 * these has a list of addresses. When we add a new address
107 * to a VRF we lookup the ifn/ifn_index, if the ifn does
108 * not exist we create it and add it to the list of IFN's
109 * within the VRF. Once we have the sctp_ifn, we add the
110 * address to the list. So we look something like:
111 *
112 * hash-vrf-table
113 * vrf-> ifn-> ifn -> ifn
114 * vrf |
115 * ... +--ifa-> ifa -> ifa
116 * vrf
117 *
118 * We keep these separate lists since the SCTP subsystem will
119 * point to these from its source address selection nets structure.
120 * When an address is deleted it does not happen right away on
121 * the SCTP side, it gets scheduled. What we do when a
122 * delete happens is immediately remove the address from
123 * the master list and decrement the refcount. As our
124 * addip iterator works through and frees the src address
125 * selection pointing to the sctp_ifa, eventually the refcount
126 * will reach 0 and we will delete it. Note that it is assumed
127 * that any locking on system level ifn/ifa is done at the
128 * caller of these functions and these routines will only
129 * lock the SCTP structures as they add or delete things.
130 *
131 * Other notes on VRF concepts.
132 * - An endpoint can be in multiple VRF's
133 * - An association lives within a VRF and only one VRF.
134 * - Any incoming packet we can deduce the VRF for by
135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
136 * - Any downward send call or connect call must supply the
137 * VRF via ancillary data or via some sort of set default
138 * VRF socket option call (again for BSD no brainer since
139 * the VRF is always 0).
140 * - An endpoint may add multiple VRF's to it.
141 * - Listening sockets can accept associations in any
142 * of the VRF's they are in but the assoc will end up
143 * in only one VRF (gotten from the packet or connect/send).
144 *
145 */
146
147 struct sctp_vrf *
148 sctp_allocate_vrf(int vrf_id)
149 {
150 struct sctp_vrf *vrf = NULL;
151 struct sctp_vrflist *bucket;
152
153 /* First allocate the VRF structure */
154 vrf = sctp_find_vrf(vrf_id);
155 if (vrf) {
156 /* Already allocated */
157 return (vrf);
158 }
159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
160 SCTP_M_VRF);
161 if (vrf == NULL) {
162 /* No memory */
163 #ifdef INVARIANTS
164 panic("No memory for VRF:%d", vrf_id);
165 #endif
166 return (NULL);
167 }
168 /* setup the VRF */
169 memset(vrf, 0, sizeof(struct sctp_vrf));
170 vrf->vrf_id = vrf_id;
171 LIST_INIT(&vrf->ifnlist);
172 vrf->total_ifa_count = 0;
173 vrf->refcount = 0;
174 /* now also setup table ids */
175 SCTP_INIT_VRF_TABLEID(vrf);
176 /* Init the HASH of addresses */
177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
178 &vrf->vrf_addr_hashmark);
179 if (vrf->vrf_addr_hash == NULL) {
180 /* No memory */
181 #ifdef INVARIANTS
182 panic("No memory for VRF:%d", vrf_id);
183 #endif
184 SCTP_FREE(vrf, SCTP_M_VRF);
185 return (NULL);
186 }
187 /* Add it to the hash table */
188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
189 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
191 return (vrf);
192 }
193
194
195 struct sctp_ifn *
196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
197 {
198 struct sctp_ifn *sctp_ifnp;
199 struct sctp_ifnlist *hash_ifn_head;
200
201 /*
202 * We assume the lock is held for the addresses if that's wrong
203 * problems could occur :-)
204 */
205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
207 if (sctp_ifnp->ifn_index == ifn_index) {
208 return (sctp_ifnp);
209 }
210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
211 return (sctp_ifnp);
212 }
213 }
214 return (NULL);
215 }
216
217
218 struct sctp_vrf *
219 sctp_find_vrf(uint32_t vrf_id)
220 {
221 struct sctp_vrflist *bucket;
222 struct sctp_vrf *liste;
223
224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
225 LIST_FOREACH(liste, bucket, next_vrf) {
226 if (vrf_id == liste->vrf_id) {
227 return (liste);
228 }
229 }
230 return (NULL);
231 }
232
233
234 void
235 sctp_free_vrf(struct sctp_vrf *vrf)
236 {
237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
238 if (vrf->vrf_addr_hash) {
239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
240 vrf->vrf_addr_hash = NULL;
241 }
242 /* We zero'd the count */
243 LIST_REMOVE(vrf, next_vrf);
244 SCTP_FREE(vrf, SCTP_M_VRF);
245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
246 }
247 }
248
249
250 void
251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
252 {
253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
254 /* We zero'd the count */
255 if (sctp_ifnp->vrf) {
256 sctp_free_vrf(sctp_ifnp->vrf);
257 }
258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
260 }
261 }
262
263
264 void
265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
266 {
267 struct sctp_ifn *sctp_ifnp;
268
269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
270 if (sctp_ifnp != NULL) {
271 sctp_ifnp->ifn_mtu = mtu;
272 }
273 }
274
275
276 void
277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
278 {
279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
280 /* We zero'd the count */
281 if (sctp_ifap->ifn_p) {
282 sctp_free_ifn(sctp_ifap->ifn_p);
283 }
284 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
286 }
287 }
288
289
290 static void
291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
292 {
293 struct sctp_ifn *found;
294
295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
296 if (found == NULL) {
297 /* Not in the list.. sorry */
298 return;
299 }
300 if (hold_addr_lock == 0)
301 SCTP_IPI_ADDR_WLOCK();
302 LIST_REMOVE(sctp_ifnp, next_bucket);
303 LIST_REMOVE(sctp_ifnp, next_ifn);
304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
305 sctp_ifnp->registered_af);
306 if (hold_addr_lock == 0)
307 SCTP_IPI_ADDR_WUNLOCK();
308 /* Take away the reference, and possibly free it */
309 sctp_free_ifn(sctp_ifnp);
310 }
311
312
313 void
314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
315 const char *if_name, uint32_t ifn_index)
316 {
317 struct sctp_vrf *vrf;
318 struct sctp_ifa *sctp_ifap;
319
320 SCTP_IPI_ADDR_RLOCK();
321 vrf = sctp_find_vrf(vrf_id);
322 if (vrf == NULL) {
323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
324 goto out;
325
326 }
327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
328 if (sctp_ifap == NULL) {
329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
330 goto out;
331 }
332 if (sctp_ifap->ifn_p == NULL) {
333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
334 goto out;
335 }
336 if (if_name) {
337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
339 sctp_ifap->ifn_p->ifn_name, if_name);
340 goto out;
341 }
342 } else {
343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
345 sctp_ifap->ifn_p->ifn_index, ifn_index);
346 goto out;
347 }
348 }
349
350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
352 out:
353 SCTP_IPI_ADDR_RUNLOCK();
354 }
355
356
357 void
358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
359 const char *if_name, uint32_t ifn_index)
360 {
361 struct sctp_vrf *vrf;
362 struct sctp_ifa *sctp_ifap;
363
364 SCTP_IPI_ADDR_RLOCK();
365 vrf = sctp_find_vrf(vrf_id);
366 if (vrf == NULL) {
367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
368 goto out;
369
370 }
371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
372 if (sctp_ifap == NULL) {
373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
374 goto out;
375 }
376 if (sctp_ifap->ifn_p == NULL) {
377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
378 goto out;
379 }
380 if (if_name) {
381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
383 sctp_ifap->ifn_p->ifn_name, if_name);
384 goto out;
385 }
386 } else {
387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
389 sctp_ifap->ifn_p->ifn_index, ifn_index);
390 goto out;
391 }
392 }
393
394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
396 out:
397 SCTP_IPI_ADDR_RUNLOCK();
398 }
399
400
401 /*-
402 * Add an ifa to an ifn.
403 * Register the interface as necessary.
404 * NOTE: ADDR write lock MUST be held.
405 */
406 static void
407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
408 {
409 int ifa_af;
410
411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
412 sctp_ifap->ifn_p = sctp_ifnp;
413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
414 /* update address counts */
415 sctp_ifnp->ifa_count++;
416 ifa_af = sctp_ifap->address.sa.sa_family;
417 switch (ifa_af) {
418 #ifdef INET
419 case AF_INET:
420 sctp_ifnp->num_v4++;
421 break;
422 #endif
423 #ifdef INET6
424 case AF_INET6:
425 sctp_ifnp->num_v6++;
426 break;
427 #endif
428 default:
429 break;
430 }
431 if (sctp_ifnp->ifa_count == 1) {
432 /* register the new interface */
433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
434 sctp_ifnp->registered_af = ifa_af;
435 }
436 }
437
438
439 /*-
440 * Remove an ifa from its ifn.
441 * If no more addresses exist, remove the ifn too. Otherwise, re-register
442 * the interface based on the remaining address families left.
443 * NOTE: ADDR write lock MUST be held.
444 */
445 static void
446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
447 {
448 LIST_REMOVE(sctp_ifap, next_ifa);
449 if (sctp_ifap->ifn_p) {
450 /* update address counts */
451 sctp_ifap->ifn_p->ifa_count--;
452 switch (sctp_ifap->address.sa.sa_family) {
453 #ifdef INET
454 case AF_INET:
455 sctp_ifap->ifn_p->num_v4--;
456 break;
457 #endif
458 #ifdef INET6
459 case AF_INET6:
460 sctp_ifap->ifn_p->num_v6--;
461 break;
462 #endif
463 default:
464 break;
465 }
466
467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
468 /* remove the ifn, possibly freeing it */
469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
470 } else {
471 /* re-register address family type, if needed */
472 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
476 sctp_ifap->ifn_p->registered_af = AF_INET;
477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
478 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
481 sctp_ifap->ifn_p->registered_af = AF_INET6;
482 }
483 /* free the ifn refcount */
484 sctp_free_ifn(sctp_ifap->ifn_p);
485 }
486 sctp_ifap->ifn_p = NULL;
487 }
488 }
489
490
491 struct sctp_ifa *
492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
493 uint32_t ifn_type, const char *if_name, void *ifa,
494 struct sockaddr *addr, uint32_t ifa_flags,
495 int dynamic_add)
496 {
497 struct sctp_vrf *vrf;
498 struct sctp_ifn *sctp_ifnp = NULL;
499 struct sctp_ifa *sctp_ifap = NULL;
500 struct sctp_ifalist *hash_addr_head;
501 struct sctp_ifnlist *hash_ifn_head;
502 uint32_t hash_of_addr;
503 int new_ifn_af = 0;
504
505 #ifdef SCTP_DEBUG
506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
508 #endif
509 SCTP_IPI_ADDR_WLOCK();
510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
511 if (sctp_ifnp) {
512 vrf = sctp_ifnp->vrf;
513 } else {
514 vrf = sctp_find_vrf(vrf_id);
515 if (vrf == NULL) {
516 vrf = sctp_allocate_vrf(vrf_id);
517 if (vrf == NULL) {
518 SCTP_IPI_ADDR_WUNLOCK();
519 return (NULL);
520 }
521 }
522 }
523 if (sctp_ifnp == NULL) {
524 /*
525 * build one and add it, can't hold lock until after malloc
526 * done though.
527 */
528 SCTP_IPI_ADDR_WUNLOCK();
529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
530 sizeof(struct sctp_ifn), SCTP_M_IFN);
531 if (sctp_ifnp == NULL) {
532 #ifdef INVARIANTS
533 panic("No memory for IFN");
534 #endif
535 return (NULL);
536 }
537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
538 sctp_ifnp->ifn_index = ifn_index;
539 sctp_ifnp->ifn_p = ifn;
540 sctp_ifnp->ifn_type = ifn_type;
541 sctp_ifnp->refcount = 0;
542 sctp_ifnp->vrf = vrf;
543 atomic_add_int(&vrf->refcount, 1);
544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
545 if (if_name != NULL) {
546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
547 } else {
548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
549 }
550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
551 LIST_INIT(&sctp_ifnp->ifalist);
552 SCTP_IPI_ADDR_WLOCK();
553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
556 new_ifn_af = 1;
557 }
558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
559 if (sctp_ifap) {
560 /* Hmm, it already exists? */
561 if ((sctp_ifap->ifn_p) &&
562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
564 sctp_ifap->ifn_p->ifn_name, ifn_index,
565 (void *)sctp_ifap);
566 if (new_ifn_af) {
567 /* Remove the created one that we don't want */
568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
569 }
570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
571 /* easy to solve, just switch back to active */
572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
574 sctp_ifap->ifn_p = sctp_ifnp;
575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
576 }
577 exit_stage_left:
578 SCTP_IPI_ADDR_WUNLOCK();
579 return (sctp_ifap);
580 } else {
581 if (sctp_ifap->ifn_p) {
582 /*
583 * The last IFN gets the address, remove the
584 * old one
585 */
586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
588 sctp_ifap->ifn_p->ifn_index, if_name,
589 ifn_index);
590 /* remove the address from the old ifn */
591 sctp_remove_ifa_from_ifn(sctp_ifap);
592 /* move the address over to the new ifn */
593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
594 goto exit_stage_left;
595 } else {
596 /* repair ifnp which was NULL ? */
597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
599 (void *)sctp_ifnp, (void *)sctp_ifap);
600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
601 }
602 goto exit_stage_left;
603 }
604 }
605 SCTP_IPI_ADDR_WUNLOCK();
606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
607 if (sctp_ifap == NULL) {
608 #ifdef INVARIANTS
609 panic("No memory for IFA");
610 #endif
611 return (NULL);
612 }
613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
614 sctp_ifap->ifn_p = sctp_ifnp;
615 atomic_add_int(&sctp_ifnp->refcount, 1);
616 sctp_ifap->vrf_id = vrf_id;
617 sctp_ifap->ifa = ifa;
618 memcpy(&sctp_ifap->address, addr, addr->sa_len);
619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
620 sctp_ifap->flags = ifa_flags;
621 /* Set scope */
622 switch (sctp_ifap->address.sa.sa_family) {
623 #ifdef INET
624 case AF_INET:
625 {
626 struct sockaddr_in *sin;
627
628 sin = &sctp_ifap->address.sin;
629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
631 sctp_ifap->src_is_loop = 1;
632 }
633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
634 sctp_ifap->src_is_priv = 1;
635 }
636 sctp_ifnp->num_v4++;
637 if (new_ifn_af)
638 new_ifn_af = AF_INET;
639 break;
640 }
641 #endif
642 #ifdef INET6
643 case AF_INET6:
644 {
645 /* ok to use deprecated addresses? */
646 struct sockaddr_in6 *sin6;
647
648 sin6 = &sctp_ifap->address.sin6;
649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
651 sctp_ifap->src_is_loop = 1;
652 }
653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
654 sctp_ifap->src_is_priv = 1;
655 }
656 sctp_ifnp->num_v6++;
657 if (new_ifn_af)
658 new_ifn_af = AF_INET6;
659 break;
660 }
661 #endif
662 default:
663 new_ifn_af = 0;
664 break;
665 }
666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
667
668 if ((sctp_ifap->src_is_priv == 0) &&
669 (sctp_ifap->src_is_loop == 0)) {
670 sctp_ifap->src_is_glob = 1;
671 }
672 SCTP_IPI_ADDR_WLOCK();
673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
675 sctp_ifap->refcount = 1;
676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
677 sctp_ifnp->ifa_count++;
678 vrf->total_ifa_count++;
679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
680 if (new_ifn_af) {
681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
682 sctp_ifnp->registered_af = new_ifn_af;
683 }
684 SCTP_IPI_ADDR_WUNLOCK();
685 if (dynamic_add) {
686 /*
687 * Bump up the refcount so that when the timer completes it
688 * will drop back down.
689 */
690 struct sctp_laddr *wi;
691
692 atomic_add_int(&sctp_ifap->refcount, 1);
693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
694 if (wi == NULL) {
695 /*
696 * Gak, what can we do? We have lost an address
697 * change can you say HOSED?
698 */
699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
700 /* Opps, must decrement the count */
701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
702 if_name);
703 return (NULL);
704 }
705 SCTP_INCR_LADDR_COUNT();
706 bzero(wi, sizeof(*wi));
707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
708 wi->ifa = sctp_ifap;
709 wi->action = SCTP_ADD_IP_ADDRESS;
710
711 SCTP_WQ_ADDR_LOCK();
712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
713 SCTP_WQ_ADDR_UNLOCK();
714
715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
716 (struct sctp_inpcb *)NULL,
717 (struct sctp_tcb *)NULL,
718 (struct sctp_nets *)NULL);
719 } else {
720 /* it's ready for use */
721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
722 }
723 return (sctp_ifap);
724 }
725
726 void
727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
728 uint32_t ifn_index, const char *if_name)
729 {
730 struct sctp_vrf *vrf;
731 struct sctp_ifa *sctp_ifap = NULL;
732
733 SCTP_IPI_ADDR_WLOCK();
734 vrf = sctp_find_vrf(vrf_id);
735 if (vrf == NULL) {
736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
737 goto out_now;
738 }
739 #ifdef SCTP_DEBUG
740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
742 #endif
743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
744 if (sctp_ifap) {
745 /* Validate the delete */
746 if (sctp_ifap->ifn_p) {
747 int valid = 0;
748
749 /*-
750 * The name has priority over the ifn_index
751 * if its given. We do this especially for
752 * panda who might recycle indexes fast.
753 */
754 if (if_name) {
755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
756 /* They match its a correct delete */
757 valid = 1;
758 }
759 }
760 if (!valid) {
761 /* last ditch check ifn_index */
762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
763 valid = 1;
764 }
765 }
766 if (!valid) {
767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
768 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
771 SCTP_IPI_ADDR_WUNLOCK();
772 return;
773 }
774 }
775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
777 /*
778 * We don't set the flag. This means that the structure will
779 * hang around in EP's that have bound specific to it until
780 * they close. This gives us TCP like behavior if someone
781 * removes an address (or for that matter adds it right
782 * back).
783 */
784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
785 vrf->total_ifa_count--;
786 LIST_REMOVE(sctp_ifap, next_bucket);
787 sctp_remove_ifa_from_ifn(sctp_ifap);
788 }
789 #ifdef SCTP_DEBUG
790 else {
791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
792 ifn_index);
793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
794 }
795 #endif
796
797 out_now:
798 SCTP_IPI_ADDR_WUNLOCK();
799 if (sctp_ifap) {
800 struct sctp_laddr *wi;
801
802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
803 if (wi == NULL) {
804 /*
805 * Gak, what can we do? We have lost an address
806 * change can you say HOSED?
807 */
808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
809
810 /* Oops, must decrement the count */
811 sctp_free_ifa(sctp_ifap);
812 return;
813 }
814 SCTP_INCR_LADDR_COUNT();
815 bzero(wi, sizeof(*wi));
816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
817 wi->ifa = sctp_ifap;
818 wi->action = SCTP_DEL_IP_ADDRESS;
819 SCTP_WQ_ADDR_LOCK();
820 /*
821 * Should this really be a tailq? As it is we will process
822 * the newest first :-0
823 */
824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
825 SCTP_WQ_ADDR_UNLOCK();
826
827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
828 (struct sctp_inpcb *)NULL,
829 (struct sctp_tcb *)NULL,
830 (struct sctp_nets *)NULL);
831 }
832 return;
833 }
834
835
836 static int
837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
838 {
839 int loopback_scope;
840
841 #if defined(INET)
842 int ipv4_local_scope, ipv4_addr_legal;
843
844 #endif
845 #if defined(INET6)
846 int local_scope, site_scope, ipv6_addr_legal;
847
848 #endif
849 struct sctp_vrf *vrf;
850 struct sctp_ifn *sctp_ifn;
851 struct sctp_ifa *sctp_ifa;
852
853 loopback_scope = stcb->asoc.scope.loopback_scope;
854 #if defined(INET)
855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
857 #endif
858 #if defined(INET6)
859 local_scope = stcb->asoc.scope.local_scope;
860 site_scope = stcb->asoc.scope.site_scope;
861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
862 #endif
863
864 SCTP_IPI_ADDR_RLOCK();
865 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
866 if (vrf == NULL) {
867 /* no vrf, no addresses */
868 SCTP_IPI_ADDR_RUNLOCK();
869 return (0);
870 }
871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
873 if ((loopback_scope == 0) &&
874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
875 continue;
876 }
877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
878 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
879 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
880 /*
881 * We allow pending addresses, where
882 * we have sent an asconf-add to be
883 * considered valid.
884 */
885 continue;
886 }
887 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
888 continue;
889 }
890 switch (sctp_ifa->address.sa.sa_family) {
891 #ifdef INET
892 case AF_INET:
893 if (ipv4_addr_legal) {
894 struct sockaddr_in *sin,
895 *rsin;
896
897 sin = &sctp_ifa->address.sin;
898 rsin = (struct sockaddr_in *)to;
899 if ((ipv4_local_scope == 0) &&
900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
901 continue;
902 }
903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
904 &sin->sin_addr) != 0) {
905 continue;
906 }
907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
908 SCTP_IPI_ADDR_RUNLOCK();
909 return (1);
910 }
911 }
912 break;
913 #endif
914 #ifdef INET6
915 case AF_INET6:
916 if (ipv6_addr_legal) {
917 struct sockaddr_in6 *sin6,
918 *rsin6;
919
920 sin6 = &sctp_ifa->address.sin6;
921 rsin6 = (struct sockaddr_in6 *)to;
922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
923 &sin6->sin6_addr) != 0) {
924 continue;
925 }
926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
927 if (local_scope == 0)
928 continue;
929 if (sin6->sin6_scope_id == 0) {
930 if (sa6_recoverscope(sin6) != 0)
931 continue;
932 }
933 }
934 if ((site_scope == 0) &&
935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
936 continue;
937 }
938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
939 SCTP_IPI_ADDR_RUNLOCK();
940 return (1);
941 }
942 }
943 break;
944 #endif
945 default:
946 /* TSNH */
947 break;
948 }
949 }
950 }
951 } else {
952 struct sctp_laddr *laddr;
953
954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
957 continue;
958 }
959 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
960 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
961 /*
962 * We allow pending addresses, where we have
963 * sent an asconf-add to be considered
964 * valid.
965 */
966 continue;
967 }
968 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
969 continue;
970 }
971 switch (to->sa_family) {
972 #ifdef INET
973 case AF_INET:
974 {
975 struct sockaddr_in *sin, *rsin;
976
977 sin = &laddr->ifa->address.sin;
978 rsin = (struct sockaddr_in *)to;
979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
980 SCTP_IPI_ADDR_RUNLOCK();
981 return (1);
982 }
983 break;
984 }
985 #endif
986 #ifdef INET6
987 case AF_INET6:
988 {
989 struct sockaddr_in6 *sin6, *rsin6;
990
991 sin6 = &laddr->ifa->address.sin6;
992 rsin6 = (struct sockaddr_in6 *)to;
993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
994 SCTP_IPI_ADDR_RUNLOCK();
995 return (1);
996 }
997 break;
998 }
999
1000 #endif
1001 default:
1002 /* TSNH */
1003 break;
1004 }
1005
1006 }
1007 }
1008 SCTP_IPI_ADDR_RUNLOCK();
1009 return (0);
1010 }
1011
1012
1013 static struct sctp_tcb *
1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1016 {
1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1018 /*
1019 * If we support the TCP model, then we must now dig through to see
1020 * if we can find our endpoint in the list of tcp ep's.
1021 */
1022 uint16_t lport, rport;
1023 struct sctppcbhead *ephead;
1024 struct sctp_inpcb *inp;
1025 struct sctp_laddr *laddr;
1026 struct sctp_tcb *stcb;
1027 struct sctp_nets *net;
1028
1029 if ((to == NULL) || (from == NULL)) {
1030 return (NULL);
1031 }
1032 switch (to->sa_family) {
1033 #ifdef INET
1034 case AF_INET:
1035 if (from->sa_family == AF_INET) {
1036 lport = ((struct sockaddr_in *)to)->sin_port;
1037 rport = ((struct sockaddr_in *)from)->sin_port;
1038 } else {
1039 return (NULL);
1040 }
1041 break;
1042 #endif
1043 #ifdef INET6
1044 case AF_INET6:
1045 if (from->sa_family == AF_INET6) {
1046 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048 } else {
1049 return (NULL);
1050 }
1051 break;
1052 #endif
1053 default:
1054 return (NULL);
1055 }
1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057 /*
1058 * Ok now for each of the guys in this bucket we must look and see:
1059 * - Does the remote port match. - Does there single association's
1060 * addresses match this address (to). If so we update p_ep to point
1061 * to this ep and return the tcb from it.
1062 */
1063 LIST_FOREACH(inp, ephead, sctp_hash) {
1064 SCTP_INP_RLOCK(inp);
1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066 SCTP_INP_RUNLOCK(inp);
1067 continue;
1068 }
1069 if (lport != inp->sctp_lport) {
1070 SCTP_INP_RUNLOCK(inp);
1071 continue;
1072 }
1073 switch (to->sa_family) {
1074 #ifdef INET
1075 case AF_INET:
1076 {
1077 struct sockaddr_in *sin;
1078
1079 sin = (struct sockaddr_in *)to;
1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081 &sin->sin_addr) != 0) {
1082 SCTP_INP_RUNLOCK(inp);
1083 continue;
1084 }
1085 break;
1086 }
1087 #endif
1088 #ifdef INET6
1089 case AF_INET6:
1090 {
1091 struct sockaddr_in6 *sin6;
1092
1093 sin6 = (struct sockaddr_in6 *)to;
1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095 &sin6->sin6_addr) != 0) {
1096 SCTP_INP_RUNLOCK(inp);
1097 continue;
1098 }
1099 break;
1100 }
1101 #endif
1102 default:
1103 SCTP_INP_RUNLOCK(inp);
1104 continue;
1105 }
1106 if (inp->def_vrf_id != vrf_id) {
1107 SCTP_INP_RUNLOCK(inp);
1108 continue;
1109 }
1110 /* check to see if the ep has one of the addresses */
1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112 /* We are NOT bound all, so look further */
1113 int match = 0;
1114
1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116
1117 if (laddr->ifa == NULL) {
1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1119 continue;
1120 }
1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123 continue;
1124 }
1125 if (laddr->ifa->address.sa.sa_family ==
1126 to->sa_family) {
1127 /* see if it matches */
1128 #ifdef INET
1129 if (from->sa_family == AF_INET) {
1130 struct sockaddr_in *intf_addr,
1131 *sin;
1132
1133 intf_addr = &laddr->ifa->address.sin;
1134 sin = (struct sockaddr_in *)to;
1135 if (sin->sin_addr.s_addr ==
1136 intf_addr->sin_addr.s_addr) {
1137 match = 1;
1138 break;
1139 }
1140 }
1141 #endif
1142 #ifdef INET6
1143 if (from->sa_family == AF_INET6) {
1144 struct sockaddr_in6 *intf_addr6;
1145 struct sockaddr_in6 *sin6;
1146
1147 sin6 = (struct sockaddr_in6 *)
1148 to;
1149 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152 intf_addr6)) {
1153 match = 1;
1154 break;
1155 }
1156 }
1157 #endif
1158 }
1159 }
1160 if (match == 0) {
1161 /* This endpoint does not have this address */
1162 SCTP_INP_RUNLOCK(inp);
1163 continue;
1164 }
1165 }
1166 /*
1167 * Ok if we hit here the ep has the address, does it hold
1168 * the tcb?
1169 */
1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172 if (stcb == NULL) {
1173 SCTP_INP_RUNLOCK(inp);
1174 continue;
1175 }
1176 SCTP_TCB_LOCK(stcb);
1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178 SCTP_TCB_UNLOCK(stcb);
1179 SCTP_INP_RUNLOCK(inp);
1180 continue;
1181 }
1182 if (stcb->rport != rport) {
1183 /* remote port does not match. */
1184 SCTP_TCB_UNLOCK(stcb);
1185 SCTP_INP_RUNLOCK(inp);
1186 continue;
1187 }
1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189 SCTP_TCB_UNLOCK(stcb);
1190 SCTP_INP_RUNLOCK(inp);
1191 continue;
1192 }
1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194 SCTP_TCB_UNLOCK(stcb);
1195 SCTP_INP_RUNLOCK(inp);
1196 continue;
1197 }
1198 /* Does this TCB have a matching address? */
1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202 /* not the same family, can't be a match */
1203 continue;
1204 }
1205 switch (from->sa_family) {
1206 #ifdef INET
1207 case AF_INET:
1208 {
1209 struct sockaddr_in *sin, *rsin;
1210
1211 sin = (struct sockaddr_in *)&net->ro._l_addr;
1212 rsin = (struct sockaddr_in *)from;
1213 if (sin->sin_addr.s_addr ==
1214 rsin->sin_addr.s_addr) {
1215 /* found it */
1216 if (netp != NULL) {
1217 *netp = net;
1218 }
1219 /*
1220 * Update the endpoint
1221 * pointer
1222 */
1223 *inp_p = inp;
1224 SCTP_INP_RUNLOCK(inp);
1225 return (stcb);
1226 }
1227 break;
1228 }
1229 #endif
1230 #ifdef INET6
1231 case AF_INET6:
1232 {
1233 struct sockaddr_in6 *sin6, *rsin6;
1234
1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236 rsin6 = (struct sockaddr_in6 *)from;
1237 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238 rsin6)) {
1239 /* found it */
1240 if (netp != NULL) {
1241 *netp = net;
1242 }
1243 /*
1244 * Update the endpoint
1245 * pointer
1246 */
1247 *inp_p = inp;
1248 SCTP_INP_RUNLOCK(inp);
1249 return (stcb);
1250 }
1251 break;
1252 }
1253 #endif
1254 default:
1255 /* TSNH */
1256 break;
1257 }
1258 }
1259 SCTP_TCB_UNLOCK(stcb);
1260 SCTP_INP_RUNLOCK(inp);
1261 }
1262 return (NULL);
1263 }
1264
1265
1266 /*
1267 * rules for use
1268 *
1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272 * NULL.
1273 */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279 struct sctpasochead *head;
1280 struct sctp_inpcb *inp;
1281 struct sctp_tcb *stcb = NULL;
1282 struct sctp_nets *net;
1283 uint16_t rport;
1284
1285 inp = *inp_p;
1286 switch (remote->sa_family) {
1287 #ifdef INET
1288 case AF_INET:
1289 rport = (((struct sockaddr_in *)remote)->sin_port);
1290 break;
1291 #endif
1292 #ifdef INET6
1293 case AF_INET6:
1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295 break;
1296 #endif
1297 default:
1298 return (NULL);
1299 }
1300 if (locked_tcb) {
1301 /*
1302 * UN-lock so we can do proper locking here this occurs when
1303 * called from load_addresses_from_init.
1304 */
1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306 SCTP_TCB_UNLOCK(locked_tcb);
1307 }
1308 SCTP_INP_INFO_RLOCK();
1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311 /*-
1312 * Now either this guy is our listener or it's the
1313 * connector. If it is the one that issued the connect, then
1314 * it's only chance is to be the first TCB in the list. If
1315 * it is the acceptor, then do the special_lookup to hash
1316 * and find the real inp.
1317 */
1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319 /* to is peer addr, from is my addr */
1320 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321 netp, inp->def_vrf_id);
1322 if ((stcb != NULL) && (locked_tcb == NULL)) {
1323 /* we have a locked tcb, lower refcount */
1324 SCTP_INP_DECR_REF(inp);
1325 }
1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328 SCTP_TCB_LOCK(locked_tcb);
1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331 }
1332 SCTP_INP_INFO_RUNLOCK();
1333 return (stcb);
1334 } else {
1335 SCTP_INP_WLOCK(inp);
1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337 goto null_return;
1338 }
1339 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340 if (stcb == NULL) {
1341 goto null_return;
1342 }
1343 SCTP_TCB_LOCK(stcb);
1344
1345 if (stcb->rport != rport) {
1346 /* remote port does not match. */
1347 SCTP_TCB_UNLOCK(stcb);
1348 goto null_return;
1349 }
1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351 SCTP_TCB_UNLOCK(stcb);
1352 goto null_return;
1353 }
1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355 SCTP_TCB_UNLOCK(stcb);
1356 goto null_return;
1357 }
1358 /* now look at the list of remote addresses */
1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362 panic("Corrupt net list");
1363 }
1364 #endif
1365 if (net->ro._l_addr.sa.sa_family !=
1366 remote->sa_family) {
1367 /* not the same family */
1368 continue;
1369 }
1370 switch (remote->sa_family) {
1371 #ifdef INET
1372 case AF_INET:
1373 {
1374 struct sockaddr_in *sin,
1375 *rsin;
1376
1377 sin = (struct sockaddr_in *)
1378 &net->ro._l_addr;
1379 rsin = (struct sockaddr_in *)remote;
1380 if (sin->sin_addr.s_addr ==
1381 rsin->sin_addr.s_addr) {
1382 /* found it */
1383 if (netp != NULL) {
1384 *netp = net;
1385 }
1386 if (locked_tcb == NULL) {
1387 SCTP_INP_DECR_REF(inp);
1388 } else if (locked_tcb != stcb) {
1389 SCTP_TCB_LOCK(locked_tcb);
1390 }
1391 if (locked_tcb) {
1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393 }
1394 SCTP_INP_WUNLOCK(inp);
1395 SCTP_INP_INFO_RUNLOCK();
1396 return (stcb);
1397 }
1398 break;
1399 }
1400 #endif
1401 #ifdef INET6
1402 case AF_INET6:
1403 {
1404 struct sockaddr_in6 *sin6,
1405 *rsin6;
1406
1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408 rsin6 = (struct sockaddr_in6 *)remote;
1409 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410 rsin6)) {
1411 /* found it */
1412 if (netp != NULL) {
1413 *netp = net;
1414 }
1415 if (locked_tcb == NULL) {
1416 SCTP_INP_DECR_REF(inp);
1417 } else if (locked_tcb != stcb) {
1418 SCTP_TCB_LOCK(locked_tcb);
1419 }
1420 if (locked_tcb) {
1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422 }
1423 SCTP_INP_WUNLOCK(inp);
1424 SCTP_INP_INFO_RUNLOCK();
1425 return (stcb);
1426 }
1427 break;
1428 }
1429 #endif
1430 default:
1431 /* TSNH */
1432 break;
1433 }
1434 }
1435 SCTP_TCB_UNLOCK(stcb);
1436 }
1437 } else {
1438 SCTP_INP_WLOCK(inp);
1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440 goto null_return;
1441 }
1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443 inp->sctp_hashmark)];
1444 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1445 if (stcb->rport != rport) {
1446 /* remote port does not match */
1447 continue;
1448 }
1449 SCTP_TCB_LOCK(stcb);
1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1451 SCTP_TCB_UNLOCK(stcb);
1452 continue;
1453 }
1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1455 SCTP_TCB_UNLOCK(stcb);
1456 continue;
1457 }
1458 /* now look at the list of remote addresses */
1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1460 #ifdef INVARIANTS
1461 if (net == (TAILQ_NEXT(net, sctp_next))) {
1462 panic("Corrupt net list");
1463 }
1464 #endif
1465 if (net->ro._l_addr.sa.sa_family !=
1466 remote->sa_family) {
1467 /* not the same family */
1468 continue;
1469 }
1470 switch (remote->sa_family) {
1471 #ifdef INET
1472 case AF_INET:
1473 {
1474 struct sockaddr_in *sin,
1475 *rsin;
1476
1477 sin = (struct sockaddr_in *)
1478 &net->ro._l_addr;
1479 rsin = (struct sockaddr_in *)remote;
1480 if (sin->sin_addr.s_addr ==
1481 rsin->sin_addr.s_addr) {
1482 /* found it */
1483 if (netp != NULL) {
1484 *netp = net;
1485 }
1486 if (locked_tcb == NULL) {
1487 SCTP_INP_DECR_REF(inp);
1488 } else if (locked_tcb != stcb) {
1489 SCTP_TCB_LOCK(locked_tcb);
1490 }
1491 if (locked_tcb) {
1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1493 }
1494 SCTP_INP_WUNLOCK(inp);
1495 SCTP_INP_INFO_RUNLOCK();
1496 return (stcb);
1497 }
1498 break;
1499 }
1500 #endif
1501 #ifdef INET6
1502 case AF_INET6:
1503 {
1504 struct sockaddr_in6 *sin6,
1505 *rsin6;
1506
1507 sin6 = (struct sockaddr_in6 *)
1508 &net->ro._l_addr;
1509 rsin6 = (struct sockaddr_in6 *)remote;
1510 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1511 rsin6)) {
1512 /* found it */
1513 if (netp != NULL) {
1514 *netp = net;
1515 }
1516 if (locked_tcb == NULL) {
1517 SCTP_INP_DECR_REF(inp);
1518 } else if (locked_tcb != stcb) {
1519 SCTP_TCB_LOCK(locked_tcb);
1520 }
1521 if (locked_tcb) {
1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1523 }
1524 SCTP_INP_WUNLOCK(inp);
1525 SCTP_INP_INFO_RUNLOCK();
1526 return (stcb);
1527 }
1528 break;
1529 }
1530 #endif
1531 default:
1532 /* TSNH */
1533 break;
1534 }
1535 }
1536 SCTP_TCB_UNLOCK(stcb);
1537 }
1538 }
1539 null_return:
1540 /* clean up for returning null */
1541 if (locked_tcb) {
1542 SCTP_TCB_LOCK(locked_tcb);
1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1544 }
1545 SCTP_INP_WUNLOCK(inp);
1546 SCTP_INP_INFO_RUNLOCK();
1547 /* not found */
1548 return (NULL);
1549 }
1550
1551
1552 /*
1553 * Find an association for a specific endpoint using the association id given
1554 * out in the COMM_UP notification
1555 */
1556 struct sctp_tcb *
1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1558 {
1559 /*
1560 * Use my the assoc_id to find a endpoint
1561 */
1562 struct sctpasochead *head;
1563 struct sctp_tcb *stcb;
1564 uint32_t id;
1565
1566 if (inp == NULL) {
1567 SCTP_PRINTF("TSNH ep_associd\n");
1568 return (NULL);
1569 }
1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1571 SCTP_PRINTF("TSNH ep_associd0\n");
1572 return (NULL);
1573 }
1574 id = (uint32_t) asoc_id;
1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1576 if (head == NULL) {
1577 /* invalid id TSNH */
1578 SCTP_PRINTF("TSNH ep_associd1\n");
1579 return (NULL);
1580 }
1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1582 if (stcb->asoc.assoc_id == id) {
1583 if (inp != stcb->sctp_ep) {
1584 /*
1585 * some other guy has the same id active (id
1586 * collision ??).
1587 */
1588 SCTP_PRINTF("TSNH ep_associd2\n");
1589 continue;
1590 }
1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1592 continue;
1593 }
1594 if (want_lock) {
1595 SCTP_TCB_LOCK(stcb);
1596 }
1597 return (stcb);
1598 }
1599 }
1600 return (NULL);
1601 }
1602
1603
1604 struct sctp_tcb *
1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1606 {
1607 struct sctp_tcb *stcb;
1608
1609 SCTP_INP_RLOCK(inp);
1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1611 SCTP_INP_RUNLOCK(inp);
1612 return (stcb);
1613 }
1614
1615
1616 /*
1617 * Endpoint probe expects that the INP_INFO is locked.
1618 */
1619 static struct sctp_inpcb *
1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1621 uint16_t lport, uint32_t vrf_id)
1622 {
1623 struct sctp_inpcb *inp;
1624 struct sctp_laddr *laddr;
1625
1626 #ifdef INET
1627 struct sockaddr_in *sin;
1628
1629 #endif
1630 #ifdef INET6
1631 struct sockaddr_in6 *sin6;
1632 struct sockaddr_in6 *intf_addr6;
1633
1634 #endif
1635 int fnd;
1636
1637 #ifdef INET
1638 sin = NULL;
1639 #endif
1640 #ifdef INET6
1641 sin6 = NULL;
1642 #endif
1643 switch (nam->sa_family) {
1644 #ifdef INET
1645 case AF_INET:
1646 sin = (struct sockaddr_in *)nam;
1647 break;
1648 #endif
1649 #ifdef INET6
1650 case AF_INET6:
1651 sin6 = (struct sockaddr_in6 *)nam;
1652 break;
1653 #endif
1654 default:
1655 /* unsupported family */
1656 return (NULL);
1657 }
1658
1659 if (head == NULL)
1660 return (NULL);
1661
1662 LIST_FOREACH(inp, head, sctp_hash) {
1663 SCTP_INP_RLOCK(inp);
1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665 SCTP_INP_RUNLOCK(inp);
1666 continue;
1667 }
1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1669 (inp->sctp_lport == lport)) {
1670 /* got it */
1671 switch (nam->sa_family) {
1672 #ifdef INET
1673 case AF_INET:
1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1675 SCTP_IPV6_V6ONLY(inp)) {
1676 /*
1677 * IPv4 on a IPv6 socket with ONLY
1678 * IPv6 set
1679 */
1680 SCTP_INP_RUNLOCK(inp);
1681 continue;
1682 }
1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1684 &sin->sin_addr) != 0) {
1685 SCTP_INP_RUNLOCK(inp);
1686 continue;
1687 }
1688 break;
1689 #endif
1690 #ifdef INET6
1691 case AF_INET6:
1692 /*
1693 * A V6 address and the endpoint is NOT
1694 * bound V6
1695 */
1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1697 SCTP_INP_RUNLOCK(inp);
1698 continue;
1699 }
1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1701 &sin6->sin6_addr) != 0) {
1702 SCTP_INP_RUNLOCK(inp);
1703 continue;
1704 }
1705 break;
1706 #endif
1707 default:
1708 break;
1709 }
1710 /* does a VRF id match? */
1711 fnd = 0;
1712 if (inp->def_vrf_id == vrf_id)
1713 fnd = 1;
1714
1715 SCTP_INP_RUNLOCK(inp);
1716 if (!fnd)
1717 continue;
1718 return (inp);
1719 }
1720 SCTP_INP_RUNLOCK(inp);
1721 }
1722 switch (nam->sa_family) {
1723 #ifdef INET
1724 case AF_INET:
1725 if (sin->sin_addr.s_addr == INADDR_ANY) {
1726 /* Can't hunt for one that has no address specified */
1727 return (NULL);
1728 }
1729 break;
1730 #endif
1731 #ifdef INET6
1732 case AF_INET6:
1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1734 /* Can't hunt for one that has no address specified */
1735 return (NULL);
1736 }
1737 break;
1738 #endif
1739 default:
1740 break;
1741 }
1742 /*
1743 * ok, not bound to all so see if we can find a EP bound to this
1744 * address.
1745 */
1746 LIST_FOREACH(inp, head, sctp_hash) {
1747 SCTP_INP_RLOCK(inp);
1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1749 SCTP_INP_RUNLOCK(inp);
1750 continue;
1751 }
1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1753 SCTP_INP_RUNLOCK(inp);
1754 continue;
1755 }
1756 /*
1757 * Ok this could be a likely candidate, look at all of its
1758 * addresses
1759 */
1760 if (inp->sctp_lport != lport) {
1761 SCTP_INP_RUNLOCK(inp);
1762 continue;
1763 }
1764 /* does a VRF id match? */
1765 fnd = 0;
1766 if (inp->def_vrf_id == vrf_id)
1767 fnd = 1;
1768
1769 if (!fnd) {
1770 SCTP_INP_RUNLOCK(inp);
1771 continue;
1772 }
1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1774 if (laddr->ifa == NULL) {
1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1776 __func__);
1777 continue;
1778 }
1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1780 (void *)laddr->ifa);
1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1783 continue;
1784 }
1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1786 /* possible, see if it matches */
1787 switch (nam->sa_family) {
1788 #ifdef INET
1789 case AF_INET:
1790 if (sin->sin_addr.s_addr ==
1791 laddr->ifa->address.sin.sin_addr.s_addr) {
1792 SCTP_INP_RUNLOCK(inp);
1793 return (inp);
1794 }
1795 break;
1796 #endif
1797 #ifdef INET6
1798 case AF_INET6:
1799 intf_addr6 = &laddr->ifa->address.sin6;
1800 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1801 intf_addr6)) {
1802 SCTP_INP_RUNLOCK(inp);
1803 return (inp);
1804 }
1805 break;
1806 #endif
1807 }
1808 }
1809 }
1810 SCTP_INP_RUNLOCK(inp);
1811 }
1812 return (NULL);
1813 }
1814
1815
1816 static struct sctp_inpcb *
1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1818 {
1819 struct sctppcbhead *head;
1820 struct sctp_inpcb *t_inp;
1821 int fnd;
1822
1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1824 SCTP_BASE_INFO(hashmark))];
1825 LIST_FOREACH(t_inp, head, sctp_hash) {
1826 if (t_inp->sctp_lport != lport) {
1827 continue;
1828 }
1829 /* is it in the VRF in question */
1830 fnd = 0;
1831 if (t_inp->def_vrf_id == vrf_id)
1832 fnd = 1;
1833 if (!fnd)
1834 continue;
1835
1836 /* This one is in use. */
1837 /* check the v6/v4 binding issue */
1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1839 SCTP_IPV6_V6ONLY(t_inp)) {
1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841 /* collision in V6 space */
1842 return (t_inp);
1843 } else {
1844 /* inp is BOUND_V4 no conflict */
1845 continue;
1846 }
1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1848 /* t_inp is bound v4 and v6, conflict always */
1849 return (t_inp);
1850 } else {
1851 /* t_inp is bound only V4 */
1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1853 SCTP_IPV6_V6ONLY(inp)) {
1854 /* no conflict */
1855 continue;
1856 }
1857 /* else fall through to conflict */
1858 }
1859 return (t_inp);
1860 }
1861 return (NULL);
1862 }
1863
1864
1865 int
1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1867 {
1868 /* For 1-2-1 with port reuse */
1869 struct sctppcbhead *head;
1870 struct sctp_inpcb *tinp, *ninp;
1871
1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1873 /* only works with port reuse on */
1874 return (-1);
1875 }
1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1877 return (0);
1878 }
1879 SCTP_INP_RUNLOCK(inp);
1880 SCTP_INP_INFO_WLOCK();
1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1882 SCTP_BASE_INFO(hashmark))];
1883 /* Kick out all non-listeners to the TCP hash */
1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1885 if (tinp->sctp_lport != inp->sctp_lport) {
1886 continue;
1887 }
1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889 continue;
1890 }
1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1892 continue;
1893 }
1894 if (tinp->sctp_socket->so_qlimit) {
1895 continue;
1896 }
1897 SCTP_INP_WLOCK(tinp);
1898 LIST_REMOVE(tinp, sctp_hash);
1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1901 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1902 SCTP_INP_WUNLOCK(tinp);
1903 }
1904 SCTP_INP_WLOCK(inp);
1905 /* Pull from where he was */
1906 LIST_REMOVE(inp, sctp_hash);
1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1909 LIST_INSERT_HEAD(head, inp, sctp_hash);
1910 SCTP_INP_WUNLOCK(inp);
1911 SCTP_INP_RLOCK(inp);
1912 SCTP_INP_INFO_WUNLOCK();
1913 return (0);
1914 }
1915
1916
1917 struct sctp_inpcb *
1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1919 uint32_t vrf_id)
1920 {
1921 /*
1922 * First we check the hash table to see if someone has this port
1923 * bound with just the port.
1924 */
1925 struct sctp_inpcb *inp;
1926 struct sctppcbhead *head;
1927 int lport;
1928 unsigned int i;
1929
1930 #ifdef INET
1931 struct sockaddr_in *sin;
1932
1933 #endif
1934 #ifdef INET6
1935 struct sockaddr_in6 *sin6;
1936
1937 #endif
1938
1939 switch (nam->sa_family) {
1940 #ifdef INET
1941 case AF_INET:
1942 sin = (struct sockaddr_in *)nam;
1943 lport = sin->sin_port;
1944 break;
1945 #endif
1946 #ifdef INET6
1947 case AF_INET6:
1948 sin6 = (struct sockaddr_in6 *)nam;
1949 lport = sin6->sin6_port;
1950 break;
1951 #endif
1952 default:
1953 return (NULL);
1954 }
1955 /*
1956 * I could cheat here and just cast to one of the types but we will
1957 * do it right. It also provides the check against an Unsupported
1958 * type too.
1959 */
1960 /* Find the head of the ALLADDR chain */
1961 if (have_lock == 0) {
1962 SCTP_INP_INFO_RLOCK();
1963 }
1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1965 SCTP_BASE_INFO(hashmark))];
1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1967
1968 /*
1969 * If the TCP model exists it could be that the main listening
1970 * endpoint is gone but there still exists a connected socket for
1971 * this guy. If so we can return the first one that we find. This
1972 * may NOT be the correct one so the caller should be wary on the
1973 * returned INP. Currently the only caller that sets find_tcp_pool
1974 * is in bindx where we are verifying that a user CAN bind the
1975 * address. He either has bound it already, or someone else has, or
1976 * its open to bind, so this is good enough.
1977 */
1978 if (inp == NULL && find_tcp_pool) {
1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1982 if (inp) {
1983 break;
1984 }
1985 }
1986 }
1987 if (inp) {
1988 SCTP_INP_INCR_REF(inp);
1989 }
1990 if (have_lock == 0) {
1991 SCTP_INP_INFO_RUNLOCK();
1992 }
1993 return (inp);
1994 }
1995
1996
1997 /*
1998 * Find an association for an endpoint with the pointer to whom you want to
1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2000 * need to change the *to to some other struct like a mbuf...
2001 */
2002 struct sctp_tcb *
2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2005 uint32_t vrf_id)
2006 {
2007 struct sctp_inpcb *inp = NULL;
2008 struct sctp_tcb *stcb;
2009
2010 SCTP_INP_INFO_RLOCK();
2011 if (find_tcp_pool) {
2012 if (inp_p != NULL) {
2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2014 vrf_id);
2015 } else {
2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2017 vrf_id);
2018 }
2019 if (stcb != NULL) {
2020 SCTP_INP_INFO_RUNLOCK();
2021 return (stcb);
2022 }
2023 }
2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2025 if (inp_p != NULL) {
2026 *inp_p = inp;
2027 }
2028 SCTP_INP_INFO_RUNLOCK();
2029 if (inp == NULL) {
2030 return (NULL);
2031 }
2032 /*
2033 * ok, we have an endpoint, now lets find the assoc for it (if any)
2034 * we now place the source address or from in the to of the find
2035 * endpoint call. Since in reality this chain is used from the
2036 * inbound packet side.
2037 */
2038 if (inp_p != NULL) {
2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2040 NULL);
2041 } else {
2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2043 NULL);
2044 }
2045 return (stcb);
2046 }
2047
2048
2049 /*
2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2051 * find all addresses that the sender has specified in any address list. Each
2052 * address will be used to lookup the TCB and see if one exits.
2053 */
2054 static struct sctp_tcb *
2055 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2057 struct sockaddr *dst)
2058 {
2059 struct sctp_paramhdr *phdr, parm_buf;
2060
2061 #if defined(INET) || defined(INET6)
2062 struct sctp_tcb *stcb;
2063 uint16_t ptype;
2064
2065 #endif
2066 uint16_t plen;
2067
2068 #ifdef INET
2069 struct sockaddr_in sin4;
2070
2071 #endif
2072 #ifdef INET6
2073 struct sockaddr_in6 sin6;
2074
2075 #endif
2076
2077 #ifdef INET
2078 memset(&sin4, 0, sizeof(sin4));
2079 sin4.sin_len = sizeof(sin4);
2080 sin4.sin_family = AF_INET;
2081 sin4.sin_port = sh->src_port;
2082 #endif
2083 #ifdef INET6
2084 memset(&sin6, 0, sizeof(sin6));
2085 sin6.sin6_len = sizeof(sin6);
2086 sin6.sin6_family = AF_INET6;
2087 sin6.sin6_port = sh->src_port;
2088 #endif
2089
2090 offset += sizeof(struct sctp_init_chunk);
2091
2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2093 while (phdr != NULL) {
2094 /* now we must see if we want the parameter */
2095 #if defined(INET) || defined(INET6)
2096 ptype = ntohs(phdr->param_type);
2097 #endif
2098 plen = ntohs(phdr->param_length);
2099 if (plen == 0) {
2100 break;
2101 }
2102 #ifdef INET
2103 if (ptype == SCTP_IPV4_ADDRESS &&
2104 plen == sizeof(struct sctp_ipv4addr_param)) {
2105 /* Get the rest of the address */
2106 struct sctp_ipv4addr_param ip4_parm, *p4;
2107
2108 phdr = sctp_get_next_param(m, offset,
2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2110 if (phdr == NULL) {
2111 return (NULL);
2112 }
2113 p4 = (struct sctp_ipv4addr_param *)phdr;
2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2115 /* look it up */
2116 stcb = sctp_findassociation_ep_addr(inp_p,
2117 (struct sockaddr *)&sin4, netp, dst, NULL);
2118 if (stcb != NULL) {
2119 return (stcb);
2120 }
2121 }
2122 #endif
2123 #ifdef INET6
2124 if (ptype == SCTP_IPV6_ADDRESS &&
2125 plen == sizeof(struct sctp_ipv6addr_param)) {
2126 /* Get the rest of the address */
2127 struct sctp_ipv6addr_param ip6_parm, *p6;
2128
2129 phdr = sctp_get_next_param(m, offset,
2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2131 if (phdr == NULL) {
2132 return (NULL);
2133 }
2134 p6 = (struct sctp_ipv6addr_param *)phdr;
2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2136 /* look it up */
2137 stcb = sctp_findassociation_ep_addr(inp_p,
2138 (struct sockaddr *)&sin6, netp, dst, NULL);
2139 if (stcb != NULL) {
2140 return (stcb);
2141 }
2142 }
2143 #endif
2144 offset += SCTP_SIZE32(plen);
2145 phdr = sctp_get_next_param(m, offset, &parm_buf,
2146 sizeof(parm_buf));
2147 }
2148 return (NULL);
2149 }
2150
2151 static struct sctp_tcb *
2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2155 {
2156 /*
2157 * Use my vtag to hash. If we find it we then verify the source addr
2158 * is in the assoc. If all goes well we save a bit on rec of a
2159 * packet.
2160 */
2161 struct sctpasochead *head;
2162 struct sctp_nets *net;
2163 struct sctp_tcb *stcb;
2164
2165 SCTP_INP_INFO_RLOCK();
2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2167 SCTP_BASE_INFO(hashasocmark))];
2168 LIST_FOREACH(stcb, head, sctp_asocs) {
2169 SCTP_INP_RLOCK(stcb->sctp_ep);
2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2171 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2172 continue;
2173 }
2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2175 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2176 continue;
2177 }
2178 SCTP_TCB_LOCK(stcb);
2179 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2180 if (stcb->asoc.my_vtag == vtag) {
2181 /* candidate */
2182 if (stcb->rport != rport) {
2183 SCTP_TCB_UNLOCK(stcb);
2184 continue;
2185 }
2186 if (stcb->sctp_ep->sctp_lport != lport) {
2187 SCTP_TCB_UNLOCK(stcb);
2188 continue;
2189 }
2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2191 SCTP_TCB_UNLOCK(stcb);
2192 continue;
2193 }
2194 /* RRS:Need toaddr check here */
2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2196 /* Endpoint does not own this address */
2197 SCTP_TCB_UNLOCK(stcb);
2198 continue;
2199 }
2200 if (remote_tag) {
2201 /*
2202 * If we have both vtags that's all we match
2203 * on
2204 */
2205 if (stcb->asoc.peer_vtag == remote_tag) {
2206 /*
2207 * If both tags match we consider it
2208 * conclusive and check NO
2209 * source/destination addresses
2210 */
2211 goto conclusive;
2212 }
2213 }
2214 if (skip_src_check) {
2215 conclusive:
2216 if (from) {
2217 *netp = sctp_findnet(stcb, from);
2218 } else {
2219 *netp = NULL; /* unknown */
2220 }
2221 if (inp_p)
2222 *inp_p = stcb->sctp_ep;
2223 SCTP_INP_INFO_RUNLOCK();
2224 return (stcb);
2225 }
2226 net = sctp_findnet(stcb, from);
2227 if (net) {
2228 /* yep its him. */
2229 *netp = net;
2230 SCTP_STAT_INCR(sctps_vtagexpress);
2231 *inp_p = stcb->sctp_ep;
2232 SCTP_INP_INFO_RUNLOCK();
2233 return (stcb);
2234 } else {
2235 /*
2236 * not him, this should only happen in rare
2237 * cases so I peg it.
2238 */
2239 SCTP_STAT_INCR(sctps_vtagbogus);
2240 }
2241 }
2242 SCTP_TCB_UNLOCK(stcb);
2243 }
2244 SCTP_INP_INFO_RUNLOCK();
2245 return (NULL);
2246 }
2247
2248
2249 /*
2250 * Find an association with the pointer to the inbound IP packet. This can be
2251 * a IPv4 or IPv6 packet.
2252 */
2253 struct sctp_tcb *
2254 sctp_findassociation_addr(struct mbuf *m, int offset,
2255 struct sockaddr *src, struct sockaddr *dst,
2256 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2258 {
2259 struct sctp_tcb *stcb;
2260 struct sctp_inpcb *inp;
2261
2262 if (sh->v_tag) {
2263 /* we only go down this path if vtag is non-zero */
2264 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2265 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2266 if (stcb) {
2267 return (stcb);
2268 }
2269 }
2270 if (inp_p) {
2271 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2272 1, vrf_id);
2273 inp = *inp_p;
2274 } else {
2275 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2276 1, vrf_id);
2277 }
2278 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2279 if (stcb == NULL && inp) {
2280 /* Found a EP but not this address */
2281 if ((ch->chunk_type == SCTP_INITIATION) ||
2282 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2283 /*-
2284 * special hook, we do NOT return linp or an
2285 * association that is linked to an existing
2286 * association that is under the TCP pool (i.e. no
2287 * listener exists). The endpoint finding routine
2288 * will always find a listener before examining the
2289 * TCP pool.
2290 */
2291 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2292 if (inp_p) {
2293 *inp_p = NULL;
2294 }
2295 return (NULL);
2296 }
2297 stcb = sctp_findassociation_special_addr(m,
2298 offset, sh, &inp, netp, dst);
2299 if (inp_p != NULL) {
2300 *inp_p = inp;
2301 }
2302 }
2303 }
2304 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2305 return (stcb);
2306 }
2307
2308 /*
2309 * lookup an association by an ASCONF lookup address.
2310 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2311 */
2312 struct sctp_tcb *
2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2314 struct sockaddr *dst, struct sctphdr *sh,
2315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2316 {
2317 struct sctp_tcb *stcb;
2318 union sctp_sockstore remote_store;
2319 struct sctp_paramhdr parm_buf, *phdr;
2320 int ptype;
2321 int zero_address = 0;
2322
2323 #ifdef INET
2324 struct sockaddr_in *sin;
2325
2326 #endif
2327 #ifdef INET6
2328 struct sockaddr_in6 *sin6;
2329
2330 #endif
2331
2332 memset(&remote_store, 0, sizeof(remote_store));
2333 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2334 &parm_buf, sizeof(struct sctp_paramhdr));
2335 if (phdr == NULL) {
2336 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2337 __func__);
2338 return NULL;
2339 }
2340 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2341 /* get the correlation address */
2342 switch (ptype) {
2343 #ifdef INET6
2344 case SCTP_IPV6_ADDRESS:
2345 {
2346 /* ipv6 address param */
2347 struct sctp_ipv6addr_param *p6, p6_buf;
2348
2349 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2350 return NULL;
2351 }
2352 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2353 offset + sizeof(struct sctp_asconf_chunk),
2354 &p6_buf.ph, sizeof(*p6));
2355 if (p6 == NULL) {
2356 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2357 __func__);
2358 return (NULL);
2359 }
2360 sin6 = &remote_store.sin6;
2361 sin6->sin6_family = AF_INET6;
2362 sin6->sin6_len = sizeof(*sin6);
2363 sin6->sin6_port = sh->src_port;
2364 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2365 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2366 zero_address = 1;
2367 break;
2368 }
2369 #endif
2370 #ifdef INET
2371 case SCTP_IPV4_ADDRESS:
2372 {
2373 /* ipv4 address param */
2374 struct sctp_ipv4addr_param *p4, p4_buf;
2375
2376 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2377 return NULL;
2378 }
2379 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2380 offset + sizeof(struct sctp_asconf_chunk),
2381 &p4_buf.ph, sizeof(*p4));
2382 if (p4 == NULL) {
2383 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2384 __func__);
2385 return (NULL);
2386 }
2387 sin = &remote_store.sin;
2388 sin->sin_family = AF_INET;
2389 sin->sin_len = sizeof(*sin);
2390 sin->sin_port = sh->src_port;
2391 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2392 if (sin->sin_addr.s_addr == INADDR_ANY)
2393 zero_address = 1;
2394 break;
2395 }
2396 #endif
2397 default:
2398 /* invalid address param type */
2399 return NULL;
2400 }
2401
2402 if (zero_address) {
2403 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2404 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2405 if (stcb != NULL) {
2406 SCTP_INP_DECR_REF(*inp_p);
2407 }
2408 } else {
2409 stcb = sctp_findassociation_ep_addr(inp_p,
2410 &remote_store.sa, netp,
2411 dst, NULL);
2412 }
2413 return (stcb);
2414 }
2415
2416
2417 /*
2418 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2419 * addresses. This way if we don't get a bind we by default pick a ephemeral
2420 * port with all addresses bound.
2421 */
2422 int
2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2424 {
2425 /*
2426 * we get called when a new endpoint starts up. We need to allocate
2427 * the sctp_inpcb structure from the zone and init it. Mark it as
2428 * unbound and find a port that we can use as an ephemeral with
2429 * INADDR_ANY. If the user binds later no problem we can then add in
2430 * the specific addresses. And setup the default parameters for the
2431 * EP.
2432 */
2433 int i, error;
2434 struct sctp_inpcb *inp;
2435 struct sctp_pcb *m;
2436 struct timeval time;
2437 sctp_sharedkey_t *null_key;
2438
2439 error = 0;
2440
2441 SCTP_INP_INFO_WLOCK();
2442 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2443 if (inp == NULL) {
2444 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2445 SCTP_INP_INFO_WUNLOCK();
2446 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2447 return (ENOBUFS);
2448 }
2449 /* zap it */
2450 bzero(inp, sizeof(*inp));
2451
2452 /* bump generations */
2453 /* setup socket pointers */
2454 inp->sctp_socket = so;
2455 inp->ip_inp.inp.inp_socket = so;
2456 inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2457 #ifdef INET6
2458 if (INP_SOCKAF(so) == AF_INET6) {
2459 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2460 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2461 }
2462 if (MODULE_GLOBAL(ip6_v6only)) {
2463 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2464 }
2465 }
2466 #endif
2467 inp->sctp_associd_counter = 1;
2468 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2469 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2470 inp->max_cwnd = 0;
2471 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2472 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2473 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2474 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2475 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2476 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2477 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2478 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2479 inp->idata_supported = 0;
2480
2481 inp->fibnum = so->so_fibnum;
2482 /* init the small hash table we use to track asocid <-> tcb */
2483 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2484 if (inp->sctp_asocidhash == NULL) {
2485 crfree(inp->ip_inp.inp.inp_cred);
2486 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2487 SCTP_INP_INFO_WUNLOCK();
2488 return (ENOBUFS);
2489 }
2490 #ifdef IPSEC
2491 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2492 if (error != 0) {
2493 crfree(inp->ip_inp.inp.inp_cred);
2494 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2495 SCTP_INP_INFO_WUNLOCK();
2496 return error;
2497 }
2498 #endif /* IPSEC */
2499 SCTP_INCR_EP_COUNT();
2500 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2501 SCTP_INP_INFO_WUNLOCK();
2502
2503 so->so_pcb = (caddr_t)inp;
2504
2505 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2506 /* UDP style socket */
2507 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2508 SCTP_PCB_FLAGS_UNBOUND);
2509 /* Be sure it is NON-BLOCKING IO for UDP */
2510 /* SCTP_SET_SO_NBIO(so); */
2511 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2512 /* TCP style socket */
2513 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2514 SCTP_PCB_FLAGS_UNBOUND);
2515 /* Be sure we have blocking IO by default */
2516 SCTP_CLEAR_SO_NBIO(so);
2517 } else {
2518 /*
2519 * unsupported socket type (RAW, etc)- in case we missed it
2520 * in protosw
2521 */
2522 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2523 so->so_pcb = NULL;
2524 crfree(inp->ip_inp.inp.inp_cred);
2525 #ifdef IPSEC
2526 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2527 #endif
2528 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2529 return (EOPNOTSUPP);
2530 }
2531 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2532 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2533 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2534 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2535 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2536 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2537 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2538 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2539 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2540 }
2541 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2542 &inp->sctp_hashmark);
2543 if (inp->sctp_tcbhash == NULL) {
2544 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2545 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2546 so->so_pcb = NULL;
2547 crfree(inp->ip_inp.inp.inp_cred);
2548 #ifdef IPSEC
2549 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2550 #endif
2551 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2552 return (ENOBUFS);
2553 }
2554 inp->def_vrf_id = vrf_id;
2555
2556 SCTP_INP_INFO_WLOCK();
2557 SCTP_INP_LOCK_INIT(inp);
2558 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2559 SCTP_INP_READ_INIT(inp);
2560 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2561 /* lock the new ep */
2562 SCTP_INP_WLOCK(inp);
2563
2564 /* add it to the info area */
2565 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2566 SCTP_INP_INFO_WUNLOCK();
2567
2568 TAILQ_INIT(&inp->read_queue);
2569 LIST_INIT(&inp->sctp_addr_list);
2570
2571 LIST_INIT(&inp->sctp_asoc_list);
2572
2573 #ifdef SCTP_TRACK_FREED_ASOCS
2574 /* TEMP CODE */
2575 LIST_INIT(&inp->sctp_asoc_free_list);
2576 #endif
2577 /* Init the timer structure for signature change */
2578 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2579 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2580
2581 /* now init the actual endpoint default data */
2582 m = &inp->sctp_ep;
2583
2584 /* setup the base timeout information */
2585 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
2586 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
2587 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2588 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2589 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2590 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2591 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2592 /* all max/min max are in ms */
2593 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2594 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2595 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2596 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2597 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2598 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2599 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2600 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2601 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2602 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2603 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2604 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2605 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2606
2607 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2608 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2609 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2610 /* number of streams to pre-open on a association */
2611 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2612
2613 /* Add adaptation cookie */
2614 m->adaptation_layer_indicator = 0;
2615 m->adaptation_layer_indicator_provided = 0;
2616
2617 /* seed random number generator */
2618 m->random_counter = 1;
2619 m->store_at = SCTP_SIGNATURE_SIZE;
2620 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2621 sctp_fill_random_store(m);
2622
2623 /* Minimum cookie size */
2624 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2625 sizeof(struct sctp_state_cookie);
2626 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2627
2628 /* Setup the initial secret */
2629 (void)SCTP_GETTIME_TIMEVAL(&time);
2630 m->time_of_secret_change = time.tv_sec;
2631
2632 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2633 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2634 }
2635 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2636
2637 /* How long is a cookie good for ? */
2638 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2639 /*
2640 * Initialize authentication parameters
2641 */
2642 m->local_hmacs = sctp_default_supported_hmaclist();
2643 m->local_auth_chunks = sctp_alloc_chunklist();
2644 if (inp->asconf_supported) {
2645 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2646 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2647 }
2648 m->default_dscp = 0;
2649 #ifdef INET6
2650 m->default_flowlabel = 0;
2651 #endif
2652 m->port = 0; /* encapsulation disabled by default */
2653 LIST_INIT(&m->shared_keys);
2654 /* add default NULL key as key id 0 */
2655 null_key = sctp_alloc_sharedkey();
2656 sctp_insert_sharedkey(&m->shared_keys, null_key);
2657 SCTP_INP_WUNLOCK(inp);
2658 #ifdef SCTP_LOG_CLOSING
2659 sctp_log_closing(inp, NULL, 12);
2660 #endif
2661 return (error);
2662 }
2663
2664
2665 void
2666 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2667 struct sctp_tcb *stcb)
2668 {
2669 struct sctp_nets *net;
2670 uint16_t lport, rport;
2671 struct sctppcbhead *head;
2672 struct sctp_laddr *laddr, *oladdr;
2673
2674 atomic_add_int(&stcb->asoc.refcnt, 1);
2675 SCTP_TCB_UNLOCK(stcb);
2676 SCTP_INP_INFO_WLOCK();
2677 SCTP_INP_WLOCK(old_inp);
2678 SCTP_INP_WLOCK(new_inp);
2679 SCTP_TCB_LOCK(stcb);
2680 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2681
2682 new_inp->sctp_ep.time_of_secret_change =
2683 old_inp->sctp_ep.time_of_secret_change;
2684 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2685 sizeof(old_inp->sctp_ep.secret_key));
2686 new_inp->sctp_ep.current_secret_number =
2687 old_inp->sctp_ep.current_secret_number;
2688 new_inp->sctp_ep.last_secret_number =
2689 old_inp->sctp_ep.last_secret_number;
2690 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2691
2692 /* make it so new data pours into the new socket */
2693 stcb->sctp_socket = new_inp->sctp_socket;
2694 stcb->sctp_ep = new_inp;
2695
2696 /* Copy the port across */
2697 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2698 rport = stcb->rport;
2699 /* Pull the tcb from the old association */
2700 LIST_REMOVE(stcb, sctp_tcbhash);
2701 LIST_REMOVE(stcb, sctp_tcblist);
2702 if (stcb->asoc.in_asocid_hash) {
2703 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2704 }
2705 /* Now insert the new_inp into the TCP connected hash */
2706 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2707
2708 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2709 /* Its safe to access */
2710 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2711
2712 /* Now move the tcb into the endpoint list */
2713 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2714 /*
2715 * Question, do we even need to worry about the ep-hash since we
2716 * only have one connection? Probably not :> so lets get rid of it
2717 * and not suck up any kernel memory in that.
2718 */
2719 if (stcb->asoc.in_asocid_hash) {
2720 struct sctpasochead *lhd;
2721
2722 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2723 new_inp->hashasocidmark)];
2724 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2725 }
2726 /* Ok. Let's restart timer. */
2727 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2728 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2729 stcb, net);
2730 }
2731
2732 SCTP_INP_INFO_WUNLOCK();
2733 if (new_inp->sctp_tcbhash != NULL) {
2734 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2735 new_inp->sctp_tcbhash = NULL;
2736 }
2737 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2738 /* Subset bound, so copy in the laddr list from the old_inp */
2739 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2740 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2741 if (laddr == NULL) {
2742 /*
2743 * Gak, what can we do? This assoc is really
2744 * HOSED. We probably should send an abort
2745 * here.
2746 */
2747 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2748 continue;
2749 }
2750 SCTP_INCR_LADDR_COUNT();
2751 bzero(laddr, sizeof(*laddr));
2752 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2753 laddr->ifa = oladdr->ifa;
2754 atomic_add_int(&laddr->ifa->refcount, 1);
2755 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2756 sctp_nxt_addr);
2757 new_inp->laddr_count++;
2758 if (oladdr == stcb->asoc.last_used_address) {
2759 stcb->asoc.last_used_address = laddr;
2760 }
2761 }
2762 }
2763 /*
2764 * Now any running timers need to be adjusted since we really don't
2765 * care if they are running or not just blast in the new_inp into
2766 * all of them.
2767 */
2768
2769 stcb->asoc.dack_timer.ep = (void *)new_inp;
2770 stcb->asoc.asconf_timer.ep = (void *)new_inp;
2771 stcb->asoc.strreset_timer.ep = (void *)new_inp;
2772 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2773 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2774 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2775 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2776 /* now what about the nets? */
2777 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2778 net->pmtu_timer.ep = (void *)new_inp;
2779 net->hb_timer.ep = (void *)new_inp;
2780 net->rxt_timer.ep = (void *)new_inp;
2781 }
2782 SCTP_INP_WUNLOCK(new_inp);
2783 SCTP_INP_WUNLOCK(old_inp);
2784 }
2785
2786 /*
2787 * insert an laddr entry with the given ifa for the desired list
2788 */
2789 static int
2790 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2791 {
2792 struct sctp_laddr *laddr;
2793
2794 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2795 if (laddr == NULL) {
2796 /* out of memory? */
2797 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2798 return (EINVAL);
2799 }
2800 SCTP_INCR_LADDR_COUNT();
2801 bzero(laddr, sizeof(*laddr));
2802 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2803 laddr->ifa = ifa;
2804 laddr->action = act;
2805 atomic_add_int(&ifa->refcount, 1);
2806 /* insert it */
2807 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2808
2809 return (0);
2810 }
2811
2812 /*
2813 * Remove an laddr entry from the local address list (on an assoc)
2814 */
2815 static void
2816 sctp_remove_laddr(struct sctp_laddr *laddr)
2817 {
2818
2819 /* remove from the list */
2820 LIST_REMOVE(laddr, sctp_nxt_addr);
2821 sctp_free_ifa(laddr->ifa);
2822 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2823 SCTP_DECR_LADDR_COUNT();
2824 }
2825
2826
2827
2828 /* sctp_ifap is used to bypass normal local address validation checks */
2829 int
2830 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2831 struct sctp_ifa *sctp_ifap, struct thread *p)
2832 {
2833 /* bind a ep to a socket address */
2834 struct sctppcbhead *head;
2835 struct sctp_inpcb *inp, *inp_tmp;
2836 struct inpcb *ip_inp;
2837 int port_reuse_active = 0;
2838 int bindall;
2839 uint16_t lport;
2840 int error;
2841 uint32_t vrf_id;
2842
2843 lport = 0;
2844 bindall = 1;
2845 inp = (struct sctp_inpcb *)so->so_pcb;
2846 ip_inp = (struct inpcb *)so->so_pcb;
2847 #ifdef SCTP_DEBUG
2848 if (addr) {
2849 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2850 ntohs(((struct sockaddr_in *)addr)->sin_port));
2851 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2852 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2853 }
2854 #endif
2855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2856 /* already did a bind, subsequent binds NOT allowed ! */
2857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2858 return (EINVAL);
2859 }
2860 #ifdef INVARIANTS
2861 if (p == NULL)
2862 panic("null proc/thread");
2863 #endif
2864 if (addr != NULL) {
2865 switch (addr->sa_family) {
2866 #ifdef INET
2867 case AF_INET:
2868 {
2869 struct sockaddr_in *sin;
2870
2871 /* IPV6_V6ONLY socket? */
2872 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2873 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2874 return (EINVAL);
2875 }
2876 if (addr->sa_len != sizeof(*sin)) {
2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2878 return (EINVAL);
2879 }
2880 sin = (struct sockaddr_in *)addr;
2881 lport = sin->sin_port;
2882 /*
2883 * For LOOPBACK the prison_local_ip4() call
2884 * will transmute the ip address to the
2885 * proper value.
2886 */
2887 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2889 return (error);
2890 }
2891 if (sin->sin_addr.s_addr != INADDR_ANY) {
2892 bindall = 0;
2893 }
2894 break;
2895 }
2896 #endif
2897 #ifdef INET6
2898 case AF_INET6:
2899 {
2900 /*
2901 * Only for pure IPv6 Address. (No IPv4
2902 * Mapped!)
2903 */
2904 struct sockaddr_in6 *sin6;
2905
2906 sin6 = (struct sockaddr_in6 *)addr;
2907
2908 if (addr->sa_len != sizeof(*sin6)) {
2909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2910 return (EINVAL);
2911 }
2912 lport = sin6->sin6_port;
2913 /*
2914 * For LOOPBACK the prison_local_ip6() call
2915 * will transmute the ipv6 address to the
2916 * proper value.
2917 */
2918 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2919 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2920 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2921 return (error);
2922 }
2923 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2924 bindall = 0;
2925 /* KAME hack: embed scopeid */
2926 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2928 return (EINVAL);
2929 }
2930 }
2931 /* this must be cleared for ifa_ifwithaddr() */
2932 sin6->sin6_scope_id = 0;
2933 break;
2934 }
2935 #endif
2936 default:
2937 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2938 return (EAFNOSUPPORT);
2939 }
2940 }
2941 SCTP_INP_INFO_WLOCK();
2942 SCTP_INP_WLOCK(inp);
2943 /* Setup a vrf_id to be the default for the non-bind-all case. */
2944 vrf_id = inp->def_vrf_id;
2945
2946 /* increase our count due to the unlock we do */
2947 SCTP_INP_INCR_REF(inp);
2948 if (lport) {
2949 /*
2950 * Did the caller specify a port? if so we must see if an ep
2951 * already has this one bound.
2952 */
2953 /* got to be root to get at low ports */
2954 if (ntohs(lport) < IPPORT_RESERVED) {
2955 if (p && (error =
2956 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2957 )) {
2958 SCTP_INP_DECR_REF(inp);
2959 SCTP_INP_WUNLOCK(inp);
2960 SCTP_INP_INFO_WUNLOCK();
2961 return (error);
2962 }
2963 }
2964 SCTP_INP_WUNLOCK(inp);
2965 if (bindall) {
2966 vrf_id = inp->def_vrf_id;
2967 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2968 if (inp_tmp != NULL) {
2969 /*
2970 * lock guy returned and lower count note
2971 * that we are not bound so inp_tmp should
2972 * NEVER be inp. And it is this inp
2973 * (inp_tmp) that gets the reference bump,
2974 * so we must lower it.
2975 */
2976 SCTP_INP_DECR_REF(inp_tmp);
2977 /* unlock info */
2978 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2979 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2980 /*
2981 * Ok, must be one-2-one and
2982 * allowing port re-use
2983 */
2984 port_reuse_active = 1;
2985 goto continue_anyway;
2986 }
2987 SCTP_INP_DECR_REF(inp);
2988 SCTP_INP_INFO_WUNLOCK();
2989 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2990 return (EADDRINUSE);
2991 }
2992 } else {
2993 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2994 if (inp_tmp != NULL) {
2995 /*
2996 * lock guy returned and lower count note
2997 * that we are not bound so inp_tmp should
2998 * NEVER be inp. And it is this inp
2999 * (inp_tmp) that gets the reference bump,
3000 * so we must lower it.
3001 */
3002 SCTP_INP_DECR_REF(inp_tmp);
3003 /* unlock info */
3004 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3005 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3006 /*
3007 * Ok, must be one-2-one and
3008 * allowing port re-use
3009 */
3010 port_reuse_active = 1;
3011 goto continue_anyway;
3012 }
3013 SCTP_INP_DECR_REF(inp);
3014 SCTP_INP_INFO_WUNLOCK();
3015 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3016 return (EADDRINUSE);
3017 }
3018 }
3019 continue_anyway:
3020 SCTP_INP_WLOCK(inp);
3021 if (bindall) {
3022 /* verify that no lport is not used by a singleton */
3023 if ((port_reuse_active == 0) &&
3024 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3025 /* Sorry someone already has this one bound */
3026 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3027 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3028 port_reuse_active = 1;
3029 } else {
3030 SCTP_INP_DECR_REF(inp);
3031 SCTP_INP_WUNLOCK(inp);
3032 SCTP_INP_INFO_WUNLOCK();
3033 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3034 return (EADDRINUSE);
3035 }
3036 }
3037 }
3038 } else {
3039 uint16_t first, last, candidate;
3040 uint16_t count;
3041 int done;
3042
3043 if (ip_inp->inp_flags & INP_HIGHPORT) {
3044 first = MODULE_GLOBAL(ipport_hifirstauto);
3045 last = MODULE_GLOBAL(ipport_hilastauto);
3046 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3047 if (p && (error =
3048 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3049 )) {
3050 SCTP_INP_DECR_REF(inp);
3051 SCTP_INP_WUNLOCK(inp);
3052 SCTP_INP_INFO_WUNLOCK();
3053 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3054 return (error);
3055 }
3056 first = MODULE_GLOBAL(ipport_lowfirstauto);
3057 last = MODULE_GLOBAL(ipport_lowlastauto);
3058 } else {
3059 first = MODULE_GLOBAL(ipport_firstauto);
3060 last = MODULE_GLOBAL(ipport_lastauto);
3061 }
3062 if (first > last) {
3063 uint16_t temp;
3064
3065 temp = first;
3066 first = last;
3067 last = temp;
3068 }
3069 count = last - first + 1; /* number of candidates */
3070 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3071
3072 done = 0;
3073 while (!done) {
3074 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3075 done = 1;
3076 }
3077 if (!done) {
3078 if (--count == 0) {
3079 SCTP_INP_DECR_REF(inp);
3080 SCTP_INP_WUNLOCK(inp);
3081 SCTP_INP_INFO_WUNLOCK();
3082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3083 return (EADDRINUSE);
3084 }
3085 if (candidate == last)
3086 candidate = first;
3087 else
3088 candidate = candidate + 1;
3089 }
3090 }
3091 lport = htons(candidate);
3092 }
3093 SCTP_INP_DECR_REF(inp);
3094 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3095 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3096 /*
3097 * this really should not happen. The guy did a non-blocking
3098 * bind and then did a close at the same time.
3099 */
3100 SCTP_INP_WUNLOCK(inp);
3101 SCTP_INP_INFO_WUNLOCK();
3102 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3103 return (EINVAL);
3104 }
3105 /* ok we look clear to give out this port, so lets setup the binding */
3106 if (bindall) {
3107 /* binding to all addresses, so just set in the proper flags */
3108 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3109 /* set the automatic addr changes from kernel flag */
3110 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3111 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3112 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3113 } else {
3114 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3115 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3116 }
3117 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3118 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3119 } else {
3120 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3121 }
3122 /*
3123 * set the automatic mobility_base from kernel flag (by
3124 * micchie)
3125 */
3126 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3127 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3128 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3129 } else {
3130 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3131 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3132 }
3133 /*
3134 * set the automatic mobility_fasthandoff from kernel flag
3135 * (by micchie)
3136 */
3137 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3138 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3139 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3140 } else {
3141 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3142 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3143 }
3144 } else {
3145 /*
3146 * bind specific, make sure flags is off and add a new
3147 * address structure to the sctp_addr_list inside the ep
3148 * structure.
3149 *
3150 * We will need to allocate one and insert it at the head. The
3151 * socketopt call can just insert new addresses in there as
3152 * well. It will also have to do the embed scope kame hack
3153 * too (before adding).
3154 */
3155 struct sctp_ifa *ifa;
3156 union sctp_sockstore store;
3157
3158 memset(&store, 0, sizeof(store));
3159 switch (addr->sa_family) {
3160 #ifdef INET
3161 case AF_INET:
3162 memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3163 store.sin.sin_port = 0;
3164 break;
3165 #endif
3166 #ifdef INET6
3167 case AF_INET6:
3168 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3169 store.sin6.sin6_port = 0;
3170 break;
3171 #endif
3172 default:
3173 break;
3174 }
3175 /*
3176 * first find the interface with the bound address need to
3177 * zero out the port to find the address! yuck! can't do
3178 * this earlier since need port for sctp_pcb_findep()
3179 */
3180 if (sctp_ifap != NULL) {
3181 ifa = sctp_ifap;
3182 } else {
3183 /*
3184 * Note for BSD we hit here always other O/S's will
3185 * pass things in via the sctp_ifap argument
3186 * (Panda).
3187 */
3188 ifa = sctp_find_ifa_by_addr(&store.sa,
3189 vrf_id, SCTP_ADDR_NOT_LOCKED);
3190 }
3191 if (ifa == NULL) {
3192 /* Can't find an interface with that address */
3193 SCTP_INP_WUNLOCK(inp);
3194 SCTP_INP_INFO_WUNLOCK();
3195 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3196 return (EADDRNOTAVAIL);
3197 }
3198 #ifdef INET6
3199 if (addr->sa_family == AF_INET6) {
3200 /* GAK, more FIXME IFA lock? */
3201 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3202 /* Can't bind a non-existent addr. */
3203 SCTP_INP_WUNLOCK(inp);
3204 SCTP_INP_INFO_WUNLOCK();
3205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3206 return (EINVAL);
3207 }
3208 }
3209 #endif
3210 /* we're not bound all */
3211 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3212 /* allow bindx() to send ASCONF's for binding changes */
3213 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3214 /* clear automatic addr changes from kernel flag */
3215 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3216
3217 /* add this address to the endpoint list */
3218 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3219 if (error != 0) {
3220 SCTP_INP_WUNLOCK(inp);
3221 SCTP_INP_INFO_WUNLOCK();
3222 return (error);
3223 }
3224 inp->laddr_count++;
3225 }
3226 /* find the bucket */
3227 if (port_reuse_active) {
3228 /* Put it into tcp 1-2-1 hash */
3229 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3230 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3231 } else {
3232 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3233 }
3234 /* put it in the bucket */
3235 LIST_INSERT_HEAD(head, inp, sctp_hash);
3236 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3237 (void *)head, ntohs(lport), port_reuse_active);
3238 /* set in the port */
3239 inp->sctp_lport = lport;
3240
3241 /* turn off just the unbound flag */
3242 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3243 SCTP_INP_WUNLOCK(inp);
3244 SCTP_INP_INFO_WUNLOCK();
3245 return (0);
3246 }
3247
3248
3249 static void
3250 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3251 {
3252 struct sctp_iterator *it, *nit;
3253
3254 /*
3255 * We enter with the only the ITERATOR_LOCK in place and a write
3256 * lock on the inp_info stuff.
3257 */
3258 it = sctp_it_ctl.cur_it;
3259 if (it && (it->vn != curvnet)) {
3260 /* Its not looking at our VNET */
3261 return;
3262 }
3263 if (it && (it->inp == inp)) {
3264 /*
3265 * This is tricky and we hold the iterator lock, but when it
3266 * returns and gets the lock (when we release it) the
3267 * iterator will try to operate on inp. We need to stop that
3268 * from happening. But of course the iterator has a
3269 * reference on the stcb and inp. We can mark it and it will
3270 * stop.
3271 *
3272 * If its a single iterator situation, we set the end iterator
3273 * flag. Otherwise we set the iterator to go to the next
3274 * inp.
3275 *
3276 */
3277 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3278 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3279 } else {
3280 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3281 }
3282 }
3283 /*
3284 * Now go through and remove any single reference to our inp that
3285 * may be still pending on the list
3286 */
3287 SCTP_IPI_ITERATOR_WQ_LOCK();
3288 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3289 if (it->vn != curvnet) {
3290 continue;
3291 }
3292 if (it->inp == inp) {
3293 /* This one points to me is it inp specific? */
3294 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3295 /* Remove and free this one */
3296 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3297 it, sctp_nxt_itr);
3298 if (it->function_atend != NULL) {
3299 (*it->function_atend) (it->pointer, it->val);
3300 }
3301 SCTP_FREE(it, SCTP_M_ITER);
3302 } else {
3303 it->inp = LIST_NEXT(it->inp, sctp_list);
3304 if (it->inp) {
3305 SCTP_INP_INCR_REF(it->inp);
3306 }
3307 }
3308 /*
3309 * When its put in the refcnt is incremented so decr
3310 * it
3311 */
3312 SCTP_INP_DECR_REF(inp);
3313 }
3314 }
3315 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3316 }
3317
3318 /* release sctp_inpcb unbind the port */
3319 void
3320 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3321 {
3322 /*
3323 * Here we free a endpoint. We must find it (if it is in the Hash
3324 * table) and remove it from there. Then we must also find it in the
3325 * overall list and remove it from there. After all removals are
3326 * complete then any timer has to be stopped. Then start the actual
3327 * freeing. a) Any local lists. b) Any associations. c) The hash of
3328 * all associations. d) finally the ep itself.
3329 */
3330 struct sctp_tcb *asoc, *nasoc;
3331 struct sctp_laddr *laddr, *nladdr;
3332 struct inpcb *ip_pcb;
3333 struct socket *so;
3334 int being_refed = 0;
3335 struct sctp_queued_to_read *sq, *nsq;
3336 int cnt;
3337 sctp_sharedkey_t *shared_key, *nshared_key;
3338
3339
3340 #ifdef SCTP_LOG_CLOSING
3341 sctp_log_closing(inp, NULL, 0);
3342 #endif
3343 SCTP_ITERATOR_LOCK();
3344 /* mark any iterators on the list or being processed */
3345 sctp_iterator_inp_being_freed(inp);
3346 SCTP_ITERATOR_UNLOCK();
3347 so = inp->sctp_socket;
3348 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3349 /* been here before.. eeks.. get out of here */
3350 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3351 #ifdef SCTP_LOG_CLOSING
3352 sctp_log_closing(inp, NULL, 1);
3353 #endif
3354 return;
3355 }
3356 SCTP_ASOC_CREATE_LOCK(inp);
3357 SCTP_INP_INFO_WLOCK();
3358
3359 SCTP_INP_WLOCK(inp);
3360 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3361 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3362 /* socket is gone, so no more wakeups allowed */
3363 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3364 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3365 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3366
3367 }
3368 /* First time through we have the socket lock, after that no more. */
3369 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3370 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3371
3372 if (inp->control) {
3373 sctp_m_freem(inp->control);
3374 inp->control = NULL;
3375 }
3376 if (inp->pkt) {
3377 sctp_m_freem(inp->pkt);
3378 inp->pkt = NULL;
3379 }
3380 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3381 * here but I will be nice :> (i.e.
3382 * ip_pcb = ep;) */
3383 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3384 int cnt_in_sd;
3385
3386 cnt_in_sd = 0;
3387 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3388 SCTP_TCB_LOCK(asoc);
3389 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3390 /* Skip guys being freed */
3391 cnt_in_sd++;
3392 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3393 /*
3394 * Special case - we did not start a
3395 * kill timer on the asoc due to it
3396 * was not closed. So go ahead and
3397 * start it now.
3398 */
3399 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3400 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3401 }
3402 SCTP_TCB_UNLOCK(asoc);
3403 continue;
3404 }
3405 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3406 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3407 (asoc->asoc.total_output_queue_size == 0)) {
3408 /*
3409 * If we have data in queue, we don't want
3410 * to just free since the app may have done,
3411 * send()/close or connect/send/close. And
3412 * it wants the data to get across first.
3413 */
3414 /* Just abandon things in the front states */
3415 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3416 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3417 cnt_in_sd++;
3418 }
3419 continue;
3420 }
3421 /* Disconnect the socket please */
3422 asoc->sctp_socket = NULL;
3423 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3424 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3425 (asoc->asoc.control_pdapi) ||
3426 (asoc->asoc.size_on_all_streams > 0) ||
3427 (so && (so->so_rcv.sb_cc > 0))) {
3428 /* Left with Data unread */
3429 struct mbuf *op_err;
3430
3431 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3432 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3433 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3434 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3435 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3436 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3437 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3438 }
3439 if (sctp_free_assoc(inp, asoc,
3440 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3441 cnt_in_sd++;
3442 }
3443 continue;
3444 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3445 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3446 (asoc->asoc.stream_queue_cnt == 0)) {
3447 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3448 goto abort_anyway;
3449 }
3450 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3451 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3452 struct sctp_nets *netp;
3453
3454 /*
3455 * there is nothing queued to send,
3456 * so I send shutdown
3457 */
3458 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3459 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3460 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3461 }
3462 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3463 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3464 sctp_stop_timers_for_shutdown(asoc);
3465 if (asoc->asoc.alternate) {
3466 netp = asoc->asoc.alternate;
3467 } else {
3468 netp = asoc->asoc.primary_destination;
3469 }
3470 sctp_send_shutdown(asoc, netp);
3471 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3472 netp);
3473 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3474 asoc->asoc.primary_destination);
3475 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3476 }
3477 } else {
3478 /* mark into shutdown pending */
3479 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3481 asoc->asoc.primary_destination);
3482 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3483 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3484 }
3485 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3486 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3487 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3488 struct mbuf *op_err;
3489
3490 abort_anyway:
3491 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3492 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3493 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3494 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3495 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3496 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3497 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3498 }
3499 if (sctp_free_assoc(inp, asoc,
3500 SCTP_PCBFREE_NOFORCE,
3501 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3502 cnt_in_sd++;
3503 }
3504 continue;
3505 } else {
3506 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3507 }
3508 }
3509 cnt_in_sd++;
3510 SCTP_TCB_UNLOCK(asoc);
3511 }
3512 /* now is there some left in our SHUTDOWN state? */
3513 if (cnt_in_sd) {
3514 #ifdef SCTP_LOG_CLOSING
3515 sctp_log_closing(inp, NULL, 2);
3516 #endif
3517 inp->sctp_socket = NULL;
3518 SCTP_INP_WUNLOCK(inp);
3519 SCTP_ASOC_CREATE_UNLOCK(inp);
3520 SCTP_INP_INFO_WUNLOCK();
3521 return;
3522 }
3523 }
3524 inp->sctp_socket = NULL;
3525 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3526 SCTP_PCB_FLAGS_UNBOUND) {
3527 /*
3528 * ok, this guy has been bound. It's port is somewhere in
3529 * the SCTP_BASE_INFO(hash table). Remove it!
3530 */
3531 LIST_REMOVE(inp, sctp_hash);
3532 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3533 }
3534 /*
3535 * If there is a timer running to kill us, forget it, since it may
3536 * have a contest on the INP lock.. which would cause us to die ...
3537 */
3538 cnt = 0;
3539 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3540 SCTP_TCB_LOCK(asoc);
3541 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3542 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3543 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3544 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3545 }
3546 cnt++;
3547 SCTP_TCB_UNLOCK(asoc);
3548 continue;
3549 }
3550 /* Free associations that are NOT killing us */
3551 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3552 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3553 struct mbuf *op_err;
3554
3555 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3556 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3557 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3558 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3559 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3560 cnt++;
3561 SCTP_TCB_UNLOCK(asoc);
3562 continue;
3563 }
3564 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3565 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3566 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3567 }
3568 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3569 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3570 cnt++;
3571 }
3572 }
3573 if (cnt) {
3574 /* Ok we have someone out there that will kill us */
3575 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3576 #ifdef SCTP_LOG_CLOSING
3577 sctp_log_closing(inp, NULL, 3);
3578 #endif
3579 SCTP_INP_WUNLOCK(inp);
3580 SCTP_ASOC_CREATE_UNLOCK(inp);
3581 SCTP_INP_INFO_WUNLOCK();
3582 return;
3583 }
3584 if (SCTP_INP_LOCK_CONTENDED(inp))
3585 being_refed++;
3586 if (SCTP_INP_READ_CONTENDED(inp))
3587 being_refed++;
3588 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3589 being_refed++;
3590
3591 if ((inp->refcount) ||
3592 (being_refed) ||
3593 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3594 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3595 #ifdef SCTP_LOG_CLOSING
3596 sctp_log_closing(inp, NULL, 4);
3597 #endif
3598 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3599 SCTP_INP_WUNLOCK(inp);
3600 SCTP_ASOC_CREATE_UNLOCK(inp);
3601 SCTP_INP_INFO_WUNLOCK();
3602 return;
3603 }
3604 inp->sctp_ep.signature_change.type = 0;
3605 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3606 /*
3607 * Remove it from the list .. last thing we need a lock for.
3608 */
3609 LIST_REMOVE(inp, sctp_list);
3610 SCTP_INP_WUNLOCK(inp);
3611 SCTP_ASOC_CREATE_UNLOCK(inp);
3612 SCTP_INP_INFO_WUNLOCK();
3613 /*
3614 * Now we release all locks. Since this INP cannot be found anymore
3615 * except possibly by the kill timer that might be running. We call
3616 * the drain function here. It should hit the case were it sees the
3617 * ACTIVE flag cleared and exit out freeing us to proceed and
3618 * destroy everything.
3619 */
3620 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3621 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3622 } else {
3623 /* Probably un-needed */
3624 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3625 }
3626
3627 #ifdef SCTP_LOG_CLOSING
3628 sctp_log_closing(inp, NULL, 5);
3629 #endif
3630
3631
3632 if ((inp->sctp_asocidhash) != NULL) {
3633 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3634 inp->sctp_asocidhash = NULL;
3635 }
3636 /* sa_ignore FREED_MEMORY */
3637 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3638 /* Its only abandoned if it had data left */
3639 if (sq->length)
3640 SCTP_STAT_INCR(sctps_left_abandon);
3641
3642 TAILQ_REMOVE(&inp->read_queue, sq, next);
3643 sctp_free_remote_addr(sq->whoFrom);
3644 if (so)
3645 so->so_rcv.sb_cc -= sq->length;
3646 if (sq->data) {
3647 sctp_m_freem(sq->data);
3648 sq->data = NULL;
3649 }
3650 /*
3651 * no need to free the net count, since at this point all
3652 * assoc's are gone.
3653 */
3654 sctp_free_a_readq(NULL, sq);
3655 }
3656 /* Now the sctp_pcb things */
3657 /*
3658 * free each asoc if it is not already closed/free. we can't use the
3659 * macro here since le_next will get freed as part of the
3660 * sctp_free_assoc() call.
3661 */
3662 #ifdef IPSEC
3663 ipsec_delete_pcbpolicy(ip_pcb);
3664 #endif
3665 if (ip_pcb->inp_options) {
3666 (void)sctp_m_free(ip_pcb->inp_options);
3667 ip_pcb->inp_options = 0;
3668 }
3669 #ifdef INET6
3670 if (ip_pcb->inp_vflag & INP_IPV6) {
3671 struct in6pcb *in6p;
3672
3673 in6p = (struct in6pcb *)inp;
3674 ip6_freepcbopts(in6p->in6p_outputopts);
3675 }
3676 #endif /* INET6 */
3677 ip_pcb->inp_vflag = 0;
3678 /* free up authentication fields */
3679 if (inp->sctp_ep.local_auth_chunks != NULL)
3680 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3681 if (inp->sctp_ep.local_hmacs != NULL)
3682 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3683
3684 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3685 LIST_REMOVE(shared_key, next);
3686 sctp_free_sharedkey(shared_key);
3687 /* sa_ignore FREED_MEMORY */
3688 }
3689
3690 /*
3691 * if we have an address list the following will free the list of
3692 * ifaddr's that are set into this ep. Again macro limitations here,
3693 * since the LIST_FOREACH could be a bad idea.
3694 */
3695 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3696 sctp_remove_laddr(laddr);
3697 }
3698
3699 #ifdef SCTP_TRACK_FREED_ASOCS
3700 /* TEMP CODE */
3701 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3702 LIST_REMOVE(asoc, sctp_tcblist);
3703 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3704 SCTP_DECR_ASOC_COUNT();
3705 }
3706 /* *** END TEMP CODE *** */
3707 #endif
3708 /* Now lets see about freeing the EP hash table. */
3709 if (inp->sctp_tcbhash != NULL) {
3710 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3711 inp->sctp_tcbhash = NULL;
3712 }
3713 /* Now we must put the ep memory back into the zone pool */
3714 crfree(inp->ip_inp.inp.inp_cred);
3715 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3716 SCTP_INP_LOCK_DESTROY(inp);
3717 SCTP_INP_READ_DESTROY(inp);
3718 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3719 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3720 SCTP_DECR_EP_COUNT();
3721 }
3722
3723
3724 struct sctp_nets *
3725 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3726 {
3727 struct sctp_nets *net;
3728
3729 /* locate the address */
3730 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3731 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3732 return (net);
3733 }
3734 return (NULL);
3735 }
3736
3737
3738 int
3739 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3740 {
3741 struct sctp_ifa *sctp_ifa;
3742
3743 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3744 if (sctp_ifa) {
3745 return (1);
3746 } else {
3747 return (0);
3748 }
3749 }
3750
3751 /*
3752 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3753 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3754 * stats of stuff.
3755 */
3756 int
3757 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3758 struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3759 {
3760 /*
3761 * The following is redundant to the same lines in the
3762 * sctp_aloc_assoc() but is needed since others call the add address
3763 * function
3764 */
3765 struct sctp_nets *net, *netfirst;
3766 int addr_inscope;
3767
3768 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3769 from);
3770 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3771
3772 netfirst = sctp_findnet(stcb, newaddr);
3773 if (netfirst) {
3774 /*
3775 * Lie and return ok, we don't want to make the association
3776 * go away for this behavior. It will happen in the TCP
3777 * model in a connected socket. It does not reach the hash
3778 * table until after the association is built so it can't be
3779 * found. Mark as reachable, since the initial creation will
3780 * have been cleared and the NOT_IN_ASSOC flag will have
3781 * been added... and we don't want to end up removing it
3782 * back out.
3783 */
3784 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3785 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3786 SCTP_ADDR_UNCONFIRMED);
3787 } else {
3788 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3789 }
3790
3791 return (0);
3792 }
3793 addr_inscope = 1;
3794 switch (newaddr->sa_family) {
3795 #ifdef INET
3796 case AF_INET:
3797 {
3798 struct sockaddr_in *sin;
3799
3800 sin = (struct sockaddr_in *)newaddr;
3801 if (sin->sin_addr.s_addr == 0) {
3802 /* Invalid address */
3803 return (-1);
3804 }
3805 /* zero out the bzero area */
3806 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3807
3808 /* assure len is set */
3809 sin->sin_len = sizeof(struct sockaddr_in);
3810 if (set_scope) {
3811 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3812 stcb->asoc.scope.ipv4_local_scope = 1;
3813 }
3814 } else {
3815 /* Validate the address is in scope */
3816 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3817 (stcb->asoc.scope.ipv4_local_scope == 0)) {
3818 addr_inscope = 0;
3819 }
3820 }
3821 break;
3822 }
3823 #endif
3824 #ifdef INET6
3825 case AF_INET6:
3826 {
3827 struct sockaddr_in6 *sin6;
3828
3829 sin6 = (struct sockaddr_in6 *)newaddr;
3830 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3831 /* Invalid address */
3832 return (-1);
3833 }
3834 /* assure len is set */
3835 sin6->sin6_len = sizeof(struct sockaddr_in6);
3836 if (set_scope) {
3837 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3838 stcb->asoc.scope.loopback_scope = 1;
3839 stcb->asoc.scope.local_scope = 0;
3840 stcb->asoc.scope.ipv4_local_scope = 1;
3841 stcb->asoc.scope.site_scope = 1;
3842 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3843 /*
3844 * If the new destination is a
3845 * LINK_LOCAL we must have common
3846 * site scope. Don't set the local
3847 * scope since we may not share all
3848 * links, only loopback can do this.
3849 * Links on the local network would
3850 * also be on our private network
3851 * for v4 too.
3852 */
3853 stcb->asoc.scope.ipv4_local_scope = 1;
3854 stcb->asoc.scope.site_scope = 1;
3855 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3856 /*
3857 * If the new destination is
3858 * SITE_LOCAL then we must have site
3859 * scope in common.
3860 */
3861 stcb->asoc.scope.site_scope = 1;
3862 }
3863 } else {
3864 /* Validate the address is in scope */
3865 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3866 (stcb->asoc.scope.loopback_scope == 0)) {
3867 addr_inscope = 0;
3868 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3869 (stcb->asoc.scope.local_scope == 0)) {
3870 addr_inscope = 0;
3871 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3872 (stcb->asoc.scope.site_scope == 0)) {
3873 addr_inscope = 0;
3874 }
3875 }
3876 break;
3877 }
3878 #endif
3879 default:
3880 /* not supported family type */
3881 return (-1);
3882 }
3883 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3884 if (net == NULL) {
3885 return (-1);
3886 }
3887 SCTP_INCR_RADDR_COUNT();
3888 bzero(net, sizeof(struct sctp_nets));
3889 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3890 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3891 switch (newaddr->sa_family) {
3892 #ifdef INET
3893 case AF_INET:
3894 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3895 break;
3896 #endif
3897 #ifdef INET6
3898 case AF_INET6:
3899 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3900 break;
3901 #endif
3902 default:
3903 break;
3904 }
3905 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3906 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3907 stcb->asoc.scope.loopback_scope = 1;
3908 stcb->asoc.scope.ipv4_local_scope = 1;
3909 stcb->asoc.scope.local_scope = 0;
3910 stcb->asoc.scope.site_scope = 1;
3911 addr_inscope = 1;
3912 }
3913 net->failure_threshold = stcb->asoc.def_net_failure;
3914 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3915 if (addr_inscope == 0) {
3916 net->dest_state = (SCTP_ADDR_REACHABLE |
3917 SCTP_ADDR_OUT_OF_SCOPE);
3918 } else {
3919 if (from == SCTP_ADDR_IS_CONFIRMED)
3920 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3921 net->dest_state = SCTP_ADDR_REACHABLE;
3922 else
3923 net->dest_state = SCTP_ADDR_REACHABLE |
3924 SCTP_ADDR_UNCONFIRMED;
3925 }
3926 /*
3927 * We set this to 0, the timer code knows that this means its an
3928 * initial value
3929 */
3930 net->rto_needed = 1;
3931 net->RTO = 0;
3932 net->RTO_measured = 0;
3933 stcb->asoc.numnets++;
3934 net->ref_count = 1;
3935 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3936 net->port = port;
3937 net->dscp = stcb->asoc.default_dscp;
3938 #ifdef INET6
3939 net->flowlabel = stcb->asoc.default_flowlabel;
3940 #endif
3941 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3942 net->dest_state |= SCTP_ADDR_NOHB;
3943 } else {
3944 net->dest_state &= ~SCTP_ADDR_NOHB;
3945 }
3946 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3947 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3948 } else {
3949 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3950 }
3951 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3952 /* Init the timer structure */
3953 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3954 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3955 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3956
3957 /* Now generate a route for this guy */
3958 #ifdef INET6
3959 /* KAME hack: embed scopeid */
3960 if (newaddr->sa_family == AF_INET6) {
3961 struct sockaddr_in6 *sin6;
3962
3963 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3964 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3965 sin6->sin6_scope_id = 0;
3966 }
3967 #endif
3968 SCTP_RTALLOC((sctp_route_t *) & net->ro,
3969 stcb->asoc.vrf_id,
3970 stcb->sctp_ep->fibnum);
3971
3972 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3973 /* Get source address */
3974 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3975 stcb,
3976 (sctp_route_t *) & net->ro,
3977 net,
3978 0,
3979 stcb->asoc.vrf_id);
3980 if (net->ro._s_addr != NULL) {
3981 net->src_addr_selected = 1;
3982 /* Now get the interface MTU */
3983 if (net->ro._s_addr->ifn_p != NULL) {
3984 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3985 }
3986 } else {
3987 net->src_addr_selected = 0;
3988 }
3989 if (net->mtu > 0) {
3990 uint32_t rmtu;
3991
3992 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3993 if (rmtu == 0) {
3994 /*
3995 * Start things off to match mtu of
3996 * interface please.
3997 */
3998 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3999 net->ro.ro_rt, net->mtu);
4000 } else {
4001 /*
4002 * we take the route mtu over the interface,
4003 * since the route may be leading out the
4004 * loopback, or a different interface.
4005 */
4006 net->mtu = rmtu;
4007 }
4008 }
4009 } else {
4010 net->src_addr_selected = 0;
4011 }
4012 if (net->mtu == 0) {
4013 switch (newaddr->sa_family) {
4014 #ifdef INET
4015 case AF_INET:
4016 net->mtu = SCTP_DEFAULT_MTU;
4017 break;
4018 #endif
4019 #ifdef INET6
4020 case AF_INET6:
4021 net->mtu = 1280;
4022 break;
4023 #endif
4024 default:
4025 break;
4026 }
4027 }
4028 #if defined(INET) || defined(INET6)
4029 if (net->port) {
4030 net->mtu -= (uint32_t) sizeof(struct udphdr);
4031 }
4032 #endif
4033 if (from == SCTP_ALLOC_ASOC) {
4034 stcb->asoc.smallest_mtu = net->mtu;
4035 }
4036 if (stcb->asoc.smallest_mtu > net->mtu) {
4037 sctp_pathmtu_adjustment(stcb, net->mtu);
4038 }
4039 #ifdef INET6
4040 if (newaddr->sa_family == AF_INET6) {
4041 struct sockaddr_in6 *sin6;
4042
4043 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4044 (void)sa6_recoverscope(sin6);
4045 }
4046 #endif
4047
4048 /* JRS - Use the congestion control given in the CC module */
4049 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4050 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4051
4052 /*
4053 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4054 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4055 */
4056 net->find_pseudo_cumack = 1;
4057 net->find_rtx_pseudo_cumack = 1;
4058 /* Choose an initial flowid. */
4059 net->flowid = stcb->asoc.my_vtag ^
4060 ntohs(stcb->rport) ^
4061 ntohs(stcb->sctp_ep->sctp_lport);
4062 net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4063 if (netp) {
4064 *netp = net;
4065 }
4066 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4067 if (net->ro.ro_rt == NULL) {
4068 /* Since we have no route put it at the back */
4069 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4070 } else if (netfirst == NULL) {
4071 /* We are the first one in the pool. */
4072 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4073 } else if (netfirst->ro.ro_rt == NULL) {
4074 /*
4075 * First one has NO route. Place this one ahead of the first
4076 * one.
4077 */
4078 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4079 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4080 /*
4081 * This one has a different interface than the one at the
4082 * top of the list. Place it ahead.
4083 */
4084 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4085 } else {
4086 /*
4087 * Ok we have the same interface as the first one. Move
4088 * forward until we find either a) one with a NULL route...
4089 * insert ahead of that b) one with a different ifp.. insert
4090 * after that. c) end of the list.. insert at the tail.
4091 */
4092 struct sctp_nets *netlook;
4093
4094 do {
4095 netlook = TAILQ_NEXT(netfirst, sctp_next);
4096 if (netlook == NULL) {
4097 /* End of the list */
4098 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4099 break;
4100 } else if (netlook->ro.ro_rt == NULL) {
4101 /* next one has NO route */
4102 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4103 break;
4104 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4105 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4106 net, sctp_next);
4107 break;
4108 }
4109 /* Shift forward */
4110 netfirst = netlook;
4111 } while (netlook != NULL);
4112 }
4113
4114 /* got to have a primary set */
4115 if (stcb->asoc.primary_destination == 0) {
4116 stcb->asoc.primary_destination = net;
4117 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4118 (net->ro.ro_rt) &&
4119 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4120 /* No route to current primary adopt new primary */
4121 stcb->asoc.primary_destination = net;
4122 }
4123 /* Validate primary is first */
4124 net = TAILQ_FIRST(&stcb->asoc.nets);
4125 if ((net != stcb->asoc.primary_destination) &&
4126 (stcb->asoc.primary_destination)) {
4127 /*
4128 * first one on the list is NOT the primary sctp_cmpaddr()
4129 * is much more efficient if the primary is the first on the
4130 * list, make it so.
4131 */
4132 TAILQ_REMOVE(&stcb->asoc.nets,
4133 stcb->asoc.primary_destination, sctp_next);
4134 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4135 stcb->asoc.primary_destination, sctp_next);
4136 }
4137 return (0);
4138 }
4139
4140
4141 static uint32_t
4142 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4143 {
4144 uint32_t id;
4145 struct sctpasochead *head;
4146 struct sctp_tcb *lstcb;
4147
4148 SCTP_INP_WLOCK(inp);
4149 try_again:
4150 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4151 /* TSNH */
4152 SCTP_INP_WUNLOCK(inp);
4153 return (0);
4154 }
4155 /*
4156 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4157 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4158 */
4159 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4160 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4161 }
4162 id = inp->sctp_associd_counter;
4163 inp->sctp_associd_counter++;
4164 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4165 if (lstcb) {
4166 goto try_again;
4167 }
4168 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4169 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4170 stcb->asoc.in_asocid_hash = 1;
4171 SCTP_INP_WUNLOCK(inp);
4172 return id;
4173 }
4174
4175 /*
4176 * allocate an association and add it to the endpoint. The caller must be
4177 * careful to add all additional addresses once they are know right away or
4178 * else the assoc will be may experience a blackout scenario.
4179 */
4180 struct sctp_tcb *
4181 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4182 int *error, uint32_t override_tag, uint32_t vrf_id,
4183 uint16_t o_streams, uint16_t port,
4184 struct thread *p
4185 )
4186 {
4187 /* note the p argument is only valid in unbound sockets */
4188
4189 struct sctp_tcb *stcb;
4190 struct sctp_association *asoc;
4191 struct sctpasochead *head;
4192 uint16_t rport;
4193 int err;
4194
4195 /*
4196 * Assumption made here: Caller has done a
4197 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4198 * address does not exist already.
4199 */
4200 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4201 /* Hit max assoc, sorry no more */
4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4203 *error = ENOBUFS;
4204 return (NULL);
4205 }
4206 if (firstaddr == NULL) {
4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4208 *error = EINVAL;
4209 return (NULL);
4210 }
4211 SCTP_INP_RLOCK(inp);
4212 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4213 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4214 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4215 /*
4216 * If its in the TCP pool, its NOT allowed to create an
4217 * association. The parent listener needs to call
4218 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4219 * off, or connected one does this.. its an error.
4220 */
4221 SCTP_INP_RUNLOCK(inp);
4222 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4223 *error = EINVAL;
4224 return (NULL);
4225 }
4226 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4227 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4228 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4229 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4230 SCTP_INP_RUNLOCK(inp);
4231 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4232 *error = EINVAL;
4233 return (NULL);
4234 }
4235 }
4236 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4237 #ifdef SCTP_DEBUG
4238 if (firstaddr) {
4239 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4240 switch (firstaddr->sa_family) {
4241 #ifdef INET
4242 case AF_INET:
4243 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4244 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4245 break;
4246 #endif
4247 #ifdef INET6
4248 case AF_INET6:
4249 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4250 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4251 break;
4252 #endif
4253 default:
4254 break;
4255 }
4256 } else {
4257 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4258 }
4259 #endif /* SCTP_DEBUG */
4260 switch (firstaddr->sa_family) {
4261 #ifdef INET
4262 case AF_INET:
4263 {
4264 struct sockaddr_in *sin;
4265
4266 sin = (struct sockaddr_in *)firstaddr;
4267 if ((ntohs(sin->sin_port) == 0) ||
4268 (sin->sin_addr.s_addr == INADDR_ANY) ||
4269 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4270 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4271 /* Invalid address */
4272 SCTP_INP_RUNLOCK(inp);
4273 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4274 *error = EINVAL;
4275 return (NULL);
4276 }
4277 rport = sin->sin_port;
4278 break;
4279 }
4280 #endif
4281 #ifdef INET6
4282 case AF_INET6:
4283 {
4284 struct sockaddr_in6 *sin6;
4285
4286 sin6 = (struct sockaddr_in6 *)firstaddr;
4287 if ((ntohs(sin6->sin6_port) == 0) ||
4288 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4289 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4290 /* Invalid address */
4291 SCTP_INP_RUNLOCK(inp);
4292 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4293 *error = EINVAL;
4294 return (NULL);
4295 }
4296 rport = sin6->sin6_port;
4297 break;
4298 }
4299 #endif
4300 default:
4301 /* not supported family type */
4302 SCTP_INP_RUNLOCK(inp);
4303 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4304 *error = EINVAL;
4305 return (NULL);
4306 }
4307 SCTP_INP_RUNLOCK(inp);
4308 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4309 /*
4310 * If you have not performed a bind, then we need to do the
4311 * ephemeral bind for you.
4312 */
4313 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4314 (struct sockaddr *)NULL,
4315 (struct sctp_ifa *)NULL,
4316 p
4317 ))) {
4318 /* bind error, probably perm */
4319 *error = err;
4320 return (NULL);
4321 }
4322 }
4323 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4324 if (stcb == NULL) {
4325 /* out of memory? */
4326 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4327 *error = ENOMEM;
4328 return (NULL);
4329 }
4330 SCTP_INCR_ASOC_COUNT();
4331
4332 bzero(stcb, sizeof(*stcb));
4333 asoc = &stcb->asoc;
4334
4335 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4336 SCTP_TCB_LOCK_INIT(stcb);
4337 SCTP_TCB_SEND_LOCK_INIT(stcb);
4338 stcb->rport = rport;
4339 /* setup back pointer's */
4340 stcb->sctp_ep = inp;
4341 stcb->sctp_socket = inp->sctp_socket;
4342 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4343 /* failed */
4344 SCTP_TCB_LOCK_DESTROY(stcb);
4345 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4346 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4347 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4348 SCTP_DECR_ASOC_COUNT();
4349 *error = err;
4350 return (NULL);
4351 }
4352 /* and the port */
4353 SCTP_INP_INFO_WLOCK();
4354 SCTP_INP_WLOCK(inp);
4355 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4356 /* inpcb freed while alloc going on */
4357 SCTP_TCB_LOCK_DESTROY(stcb);
4358 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4359 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4360 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4361 SCTP_INP_WUNLOCK(inp);
4362 SCTP_INP_INFO_WUNLOCK();
4363 SCTP_DECR_ASOC_COUNT();
4364 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4365 *error = EINVAL;
4366 return (NULL);
4367 }
4368 SCTP_TCB_LOCK(stcb);
4369
4370 /* now that my_vtag is set, add it to the hash */
4371 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4372 /* put it in the bucket in the vtag hash of assoc's for the system */
4373 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4374 SCTP_INP_INFO_WUNLOCK();
4375
4376 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4377 /* failure.. memory error? */
4378 if (asoc->strmout) {
4379 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4380 asoc->strmout = NULL;
4381 }
4382 if (asoc->mapping_array) {
4383 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4384 asoc->mapping_array = NULL;
4385 }
4386 if (asoc->nr_mapping_array) {
4387 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4388 asoc->nr_mapping_array = NULL;
4389 }
4390 SCTP_DECR_ASOC_COUNT();
4391 SCTP_TCB_UNLOCK(stcb);
4392 SCTP_TCB_LOCK_DESTROY(stcb);
4393 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4394 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4395 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4396 SCTP_INP_WUNLOCK(inp);
4397 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4398 *error = ENOBUFS;
4399 return (NULL);
4400 }
4401 /* Init all the timers */
4402 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4403 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4404 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4405 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4406 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4407 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4408 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4409
4410 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4411 /* now file the port under the hash as well */
4412 if (inp->sctp_tcbhash != NULL) {
4413 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4414 inp->sctp_hashmark)];
4415 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4416 }
4417 SCTP_INP_WUNLOCK(inp);
4418 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4419 return (stcb);
4420 }
4421
4422
4423 void
4424 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4425 {
4426 struct sctp_association *asoc;
4427
4428 asoc = &stcb->asoc;
4429 asoc->numnets--;
4430 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4431 if (net == asoc->primary_destination) {
4432 /* Reset primary */
4433 struct sctp_nets *lnet;
4434
4435 lnet = TAILQ_FIRST(&asoc->nets);
4436 /*
4437 * Mobility adaptation Ideally, if deleted destination is
4438 * the primary, it becomes a fast retransmission trigger by
4439 * the subsequent SET PRIMARY. (by micchie)
4440 */
4441 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4442 SCTP_MOBILITY_BASE) ||
4443 sctp_is_mobility_feature_on(stcb->sctp_ep,
4444 SCTP_MOBILITY_FASTHANDOFF)) {
4445 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4446 if (asoc->deleted_primary != NULL) {
4447 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4448 goto out;
4449 }
4450 asoc->deleted_primary = net;
4451 atomic_add_int(&net->ref_count, 1);
4452 memset(&net->lastsa, 0, sizeof(net->lastsa));
4453 memset(&net->lastsv, 0, sizeof(net->lastsv));
4454 sctp_mobility_feature_on(stcb->sctp_ep,
4455 SCTP_MOBILITY_PRIM_DELETED);
4456 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4457 stcb->sctp_ep, stcb, NULL);
4458 }
4459 out:
4460 /* Try to find a confirmed primary */
4461 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4462 }
4463 if (net == asoc->last_data_chunk_from) {
4464 /* Reset primary */
4465 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4466 }
4467 if (net == asoc->last_control_chunk_from) {
4468 /* Clear net */
4469 asoc->last_control_chunk_from = NULL;
4470 }
4471 if (net == stcb->asoc.alternate) {
4472 sctp_free_remote_addr(stcb->asoc.alternate);
4473 stcb->asoc.alternate = NULL;
4474 }
4475 sctp_free_remote_addr(net);
4476 }
4477
4478 /*
4479 * remove a remote endpoint address from an association, it will fail if the
4480 * address does not exist.
4481 */
4482 int
4483 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4484 {
4485 /*
4486 * Here we need to remove a remote address. This is quite simple, we
4487 * first find it in the list of address for the association
4488 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4489 * on that item. Note we do not allow it to be removed if there are
4490 * no other addresses.
4491 */
4492 struct sctp_association *asoc;
4493 struct sctp_nets *net, *nnet;
4494
4495 asoc = &stcb->asoc;
4496
4497 /* locate the address */
4498 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4499 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4500 continue;
4501 }
4502 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4503 remaddr)) {
4504 /* we found the guy */
4505 if (asoc->numnets < 2) {
4506 /* Must have at LEAST two remote addresses */
4507 return (-1);
4508 } else {
4509 sctp_remove_net(stcb, net);
4510 return (0);
4511 }
4512 }
4513 }
4514 /* not found. */
4515 return (-2);
4516 }
4517
4518 void
4519 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4520 {
4521 struct sctpvtaghead *chain;
4522 struct sctp_tagblock *twait_block;
4523 int found = 0;
4524 int i;
4525
4526 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4527 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4528 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4529 if ((twait_block->vtag_block[i].v_tag == tag) &&
4530 (twait_block->vtag_block[i].lport == lport) &&
4531 (twait_block->vtag_block[i].rport == rport)) {
4532 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4533 twait_block->vtag_block[i].v_tag = 0;
4534 twait_block->vtag_block[i].lport = 0;
4535 twait_block->vtag_block[i].rport = 0;
4536 found = 1;
4537 break;
4538 }
4539 }
4540 if (found)
4541 break;
4542 }
4543 }
4544
4545 int
4546 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4547 {
4548 struct sctpvtaghead *chain;
4549 struct sctp_tagblock *twait_block;
4550 int found = 0;
4551 int i;
4552
4553 SCTP_INP_INFO_WLOCK();
4554 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4555 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4556 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4557 if ((twait_block->vtag_block[i].v_tag == tag) &&
4558 (twait_block->vtag_block[i].lport == lport) &&
4559 (twait_block->vtag_block[i].rport == rport)) {
4560 found = 1;
4561 break;
4562 }
4563 }
4564 if (found)
4565 break;
4566 }
4567 SCTP_INP_INFO_WUNLOCK();
4568 return (found);
4569 }
4570
4571
4572 void
4573 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4574 {
4575 struct sctpvtaghead *chain;
4576 struct sctp_tagblock *twait_block;
4577 struct timeval now;
4578 int set, i;
4579
4580 if (time == 0) {
4581 /* Its disabled */
4582 return;
4583 }
4584 (void)SCTP_GETTIME_TIMEVAL(&now);
4585 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4586 set = 0;
4587 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4588 /* Block(s) present, lets find space, and expire on the fly */
4589 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4590 if ((twait_block->vtag_block[i].v_tag == 0) &&
4591 !set) {
4592 twait_block->vtag_block[i].tv_sec_at_expire =
4593 now.tv_sec + time;
4594 twait_block->vtag_block[i].v_tag = tag;
4595 twait_block->vtag_block[i].lport = lport;
4596 twait_block->vtag_block[i].rport = rport;
4597 set = 1;
4598 } else if ((twait_block->vtag_block[i].v_tag) &&
4599 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4600 /* Audit expires this guy */
4601 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4602 twait_block->vtag_block[i].v_tag = 0;
4603 twait_block->vtag_block[i].lport = 0;
4604 twait_block->vtag_block[i].rport = 0;
4605 if (set == 0) {
4606 /* Reuse it for my new tag */
4607 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4608 twait_block->vtag_block[i].v_tag = tag;
4609 twait_block->vtag_block[i].lport = lport;
4610 twait_block->vtag_block[i].rport = rport;
4611 set = 1;
4612 }
4613 }
4614 }
4615 if (set) {
4616 /*
4617 * We only do up to the block where we can place our
4618 * tag for audits
4619 */
4620 break;
4621 }
4622 }
4623 /* Need to add a new block to chain */
4624 if (!set) {
4625 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4626 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4627 if (twait_block == NULL) {
4628 #ifdef INVARIANTS
4629 panic("Can not alloc tagblock");
4630 #endif
4631 return;
4632 }
4633 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4634 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4635 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4636 twait_block->vtag_block[0].v_tag = tag;
4637 twait_block->vtag_block[0].lport = lport;
4638 twait_block->vtag_block[0].rport = rport;
4639 }
4640 }
4641
4642 void
4643 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4644 {
4645 struct sctp_tmit_chunk *chk, *nchk;
4646 struct sctp_queued_to_read *ctl, *nctl;
4647
4648 TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
4649 TAILQ_REMOVE(rh, ctl, next_instrm);
4650 ctl->on_strm_q = 0;
4651 if (ctl->on_read_q == 0) {
4652 sctp_free_remote_addr(ctl->whoFrom);
4653 if (ctl->data) {
4654 sctp_m_freem(ctl->data);
4655 ctl->data = NULL;
4656 }
4657 }
4658 /* Reassembly free? */
4659 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
4660 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
4661 if (chk->data) {
4662 sctp_m_freem(chk->data);
4663 chk->data = NULL;
4664 }
4665 if (chk->holds_key_ref)
4666 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4667 sctp_free_remote_addr(chk->whoTo);
4668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4669 SCTP_DECR_CHK_COUNT();
4670 /* sa_ignore FREED_MEMORY */
4671 }
4672 /*
4673 * We don't free the address here since all the net's were
4674 * freed above.
4675 */
4676 if (ctl->on_read_q == 0) {
4677 sctp_free_a_readq(stcb, ctl);
4678 }
4679 }
4680 }
4681
4682
4683 /*-
4684 * Free the association after un-hashing the remote port. This
4685 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4686 * expect that the input to this function IS a locked TCB.
4687 * It will return 0, if it did NOT destroy the association (instead
4688 * it unlocks it. It will return NON-zero if it either destroyed the
4689 * association OR the association is already destroyed.
4690 */
4691 int
4692 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4693 {
4694 int i;
4695 struct sctp_association *asoc;
4696 struct sctp_nets *net, *nnet;
4697 struct sctp_laddr *laddr, *naddr;
4698 struct sctp_tmit_chunk *chk, *nchk;
4699 struct sctp_asconf_addr *aparam, *naparam;
4700 struct sctp_asconf_ack *aack, *naack;
4701 struct sctp_stream_reset_list *strrst, *nstrrst;
4702 struct sctp_queued_to_read *sq, *nsq;
4703 struct sctp_stream_queue_pending *sp, *nsp;
4704 sctp_sharedkey_t *shared_key, *nshared_key;
4705 struct socket *so;
4706
4707 /* first, lets purge the entry from the hash table. */
4708
4709 #ifdef SCTP_LOG_CLOSING
4710 sctp_log_closing(inp, stcb, 6);
4711 #endif
4712 if (stcb->asoc.state == 0) {
4713 #ifdef SCTP_LOG_CLOSING
4714 sctp_log_closing(inp, NULL, 7);
4715 #endif
4716 /* there is no asoc, really TSNH :-0 */
4717 return (1);
4718 }
4719 if (stcb->asoc.alternate) {
4720 sctp_free_remote_addr(stcb->asoc.alternate);
4721 stcb->asoc.alternate = NULL;
4722 }
4723 /* TEMP CODE */
4724 if (stcb->freed_from_where == 0) {
4725 /* Only record the first place free happened from */
4726 stcb->freed_from_where = from_location;
4727 }
4728 /* TEMP CODE */
4729
4730 asoc = &stcb->asoc;
4731 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4732 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4733 /* nothing around */
4734 so = NULL;
4735 else
4736 so = inp->sctp_socket;
4737
4738 /*
4739 * We used timer based freeing if a reader or writer is in the way.
4740 * So we first check if we are actually being called from a timer,
4741 * if so we abort early if a reader or writer is still in the way.
4742 */
4743 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4744 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4745 /*
4746 * is it the timer driving us? if so are the reader/writers
4747 * gone?
4748 */
4749 if (stcb->asoc.refcnt) {
4750 /* nope, reader or writer in the way */
4751 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4752 /* no asoc destroyed */
4753 SCTP_TCB_UNLOCK(stcb);
4754 #ifdef SCTP_LOG_CLOSING
4755 sctp_log_closing(inp, stcb, 8);
4756 #endif
4757 return (0);
4758 }
4759 }
4760 /* now clean up any other timers */
4761 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4762 asoc->dack_timer.self = NULL;
4763 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4764 /*-
4765 * For stream reset we don't blast this unless
4766 * it is a str-reset timer, it might be the
4767 * free-asoc timer which we DON'T want to
4768 * disturb.
4769 */
4770 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4771 asoc->strreset_timer.self = NULL;
4772 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4773 asoc->asconf_timer.self = NULL;
4774 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4775 asoc->autoclose_timer.self = NULL;
4776 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4777 asoc->shut_guard_timer.self = NULL;
4778 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4779 asoc->delayed_event_timer.self = NULL;
4780 /* Mobility adaptation */
4781 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4782 asoc->delete_prim_timer.self = NULL;
4783 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4784 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4785 net->rxt_timer.self = NULL;
4786 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4787 net->pmtu_timer.self = NULL;
4788 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4789 net->hb_timer.self = NULL;
4790 }
4791 /* Now the read queue needs to be cleaned up (only once) */
4792 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4793 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4794 SCTP_INP_READ_LOCK(inp);
4795 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4796 if (sq->stcb == stcb) {
4797 sq->do_not_ref_stcb = 1;
4798 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4799 /*
4800 * If there is no end, there never will be
4801 * now.
4802 */
4803 if (sq->end_added == 0) {
4804 /* Held for PD-API clear that. */
4805 sq->pdapi_aborted = 1;
4806 sq->held_length = 0;
4807 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4808 /*
4809 * Need to add a PD-API
4810 * aborted indication.
4811 * Setting the control_pdapi
4812 * assures that it will be
4813 * added right after this
4814 * msg.
4815 */
4816 uint32_t strseq;
4817
4818 stcb->asoc.control_pdapi = sq;
4819 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4820 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4821 stcb,
4822 SCTP_PARTIAL_DELIVERY_ABORTED,
4823 (void *)&strseq,
4824 SCTP_SO_LOCKED);
4825 stcb->asoc.control_pdapi = NULL;
4826 }
4827 }
4828 /* Add an end to wake them */
4829 sq->end_added = 1;
4830 }
4831 }
4832 SCTP_INP_READ_UNLOCK(inp);
4833 if (stcb->block_entry) {
4834 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4835 stcb->block_entry->error = ECONNRESET;
4836 stcb->block_entry = NULL;
4837 }
4838 }
4839 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4840 /*
4841 * Someone holds a reference OR the socket is unaccepted
4842 * yet.
4843 */
4844 if ((stcb->asoc.refcnt) ||
4845 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4847 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4848 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4849 }
4850 SCTP_TCB_UNLOCK(stcb);
4851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4852 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4853 /* nothing around */
4854 so = NULL;
4855 if (so) {
4856 /* Wake any reader/writers */
4857 sctp_sorwakeup(inp, so);
4858 sctp_sowwakeup(inp, so);
4859 }
4860 #ifdef SCTP_LOG_CLOSING
4861 sctp_log_closing(inp, stcb, 9);
4862 #endif
4863 /* no asoc destroyed */
4864 return (0);
4865 }
4866 #ifdef SCTP_LOG_CLOSING
4867 sctp_log_closing(inp, stcb, 10);
4868 #endif
4869 /*
4870 * When I reach here, no others want to kill the assoc yet.. and I
4871 * own the lock. Now its possible an abort comes in when I do the
4872 * lock exchange below to grab all the locks to do the final take
4873 * out. to prevent this we increment the count, which will start a
4874 * timer and blow out above thus assuring us that we hold exclusive
4875 * killing of the asoc. Note that after getting back the TCB lock we
4876 * will go ahead and increment the counter back up and stop any
4877 * timer a passing stranger may have started :-S
4878 */
4879 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4880 atomic_add_int(&stcb->asoc.refcnt, 1);
4881
4882 SCTP_TCB_UNLOCK(stcb);
4883 SCTP_INP_INFO_WLOCK();
4884 SCTP_INP_WLOCK(inp);
4885 SCTP_TCB_LOCK(stcb);
4886 }
4887 /* Double check the GONE flag */
4888 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4889 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4890 /* nothing around */
4891 so = NULL;
4892
4893 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4894 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4895 /*
4896 * For TCP type we need special handling when we are
4897 * connected. We also include the peel'ed off ones to.
4898 */
4899 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4900 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4901 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4902 if (so) {
4903 SOCK_LOCK(so);
4904 if (so->so_rcv.sb_cc == 0) {
4905 so->so_state &= ~(SS_ISCONNECTING |
4906 SS_ISDISCONNECTING |
4907 SS_ISCONFIRMING |
4908 SS_ISCONNECTED);
4909 }
4910 socantrcvmore_locked(so);
4911 sctp_sowwakeup(inp, so);
4912 sctp_sorwakeup(inp, so);
4913 SCTP_SOWAKEUP(so);
4914 }
4915 }
4916 }
4917 /*
4918 * Make it invalid too, that way if its about to run it will abort
4919 * and return.
4920 */
4921 /* re-increment the lock */
4922 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4923 atomic_add_int(&stcb->asoc.refcnt, -1);
4924 }
4925 if (stcb->asoc.refcnt) {
4926 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4927 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4928 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4929 SCTP_INP_INFO_WUNLOCK();
4930 SCTP_INP_WUNLOCK(inp);
4931 }
4932 SCTP_TCB_UNLOCK(stcb);
4933 return (0);
4934 }
4935 asoc->state = 0;
4936 if (inp->sctp_tcbhash) {
4937 LIST_REMOVE(stcb, sctp_tcbhash);
4938 }
4939 if (stcb->asoc.in_asocid_hash) {
4940 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4941 }
4942 /* Now lets remove it from the list of ALL associations in the EP */
4943 LIST_REMOVE(stcb, sctp_tcblist);
4944 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4945 SCTP_INP_INCR_REF(inp);
4946 SCTP_INP_WUNLOCK(inp);
4947 }
4948 /* pull from vtag hash */
4949 LIST_REMOVE(stcb, sctp_asocs);
4950 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4951 inp->sctp_lport, stcb->rport);
4952
4953 /*
4954 * Now restop the timers to be sure this is paranoia at is finest!
4955 */
4956 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4957 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4958 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4959 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4960 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4961 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4962 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4963 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4964 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4965 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4966 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4967 }
4968
4969 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4970 /*
4971 * The chunk lists and such SHOULD be empty but we check them just
4972 * in case.
4973 */
4974 /* anything on the wheel needs to be removed */
4975 for (i = 0; i < asoc->streamoutcnt; i++) {
4976 struct sctp_stream_out *outs;
4977
4978 outs = &asoc->strmout[i];
4979 /* now clean up any chunks here */
4980 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4981 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4982 TAILQ_REMOVE(&outs->outqueue, sp, next);
4983 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4984 sctp_free_spbufspace(stcb, asoc, sp);
4985 if (sp->data) {
4986 if (so) {
4987 /* Still an open socket - report */
4988 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4989 0, (void *)sp, SCTP_SO_LOCKED);
4990 }
4991 if (sp->data) {
4992 sctp_m_freem(sp->data);
4993 sp->data = NULL;
4994 sp->tail_mbuf = NULL;
4995 sp->length = 0;
4996 }
4997 }
4998 if (sp->net) {
4999 sctp_free_remote_addr(sp->net);
5000 sp->net = NULL;
5001 }
5002 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5003 }
5004 }
5005 /* sa_ignore FREED_MEMORY */
5006 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5007 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5008 SCTP_FREE(strrst, SCTP_M_STRESET);
5009 }
5010 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5011 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5012 if (sq->data) {
5013 sctp_m_freem(sq->data);
5014 sq->data = NULL;
5015 }
5016 sctp_free_remote_addr(sq->whoFrom);
5017 sq->whoFrom = NULL;
5018 sq->stcb = NULL;
5019 /* Free the ctl entry */
5020 sctp_free_a_readq(stcb, sq);
5021 /* sa_ignore FREED_MEMORY */
5022 }
5023 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5024 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5025 if (chk->data) {
5026 sctp_m_freem(chk->data);
5027 chk->data = NULL;
5028 }
5029 if (chk->holds_key_ref)
5030 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5031 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5032 SCTP_DECR_CHK_COUNT();
5033 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5034 asoc->free_chunk_cnt--;
5035 /* sa_ignore FREED_MEMORY */
5036 }
5037 /* pending send queue SHOULD be empty */
5038 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5039 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5040 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5041 #ifdef INVARIANTS
5042 } else {
5043 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5044 #endif
5045 }
5046 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5047 if (chk->data) {
5048 if (so) {
5049 /* Still a socket? */
5050 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5051 0, chk, SCTP_SO_LOCKED);
5052 }
5053 if (chk->data) {
5054 sctp_m_freem(chk->data);
5055 chk->data = NULL;
5056 }
5057 }
5058 if (chk->holds_key_ref)
5059 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5060 if (chk->whoTo) {
5061 sctp_free_remote_addr(chk->whoTo);
5062 chk->whoTo = NULL;
5063 }
5064 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5065 SCTP_DECR_CHK_COUNT();
5066 /* sa_ignore FREED_MEMORY */
5067 }
5068 /* sent queue SHOULD be empty */
5069 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5070 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5071 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5072 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5073 #ifdef INVARIANTS
5074 } else {
5075 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5076 #endif
5077 }
5078 }
5079 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5080 if (chk->data) {
5081 if (so) {
5082 /* Still a socket? */
5083 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5084 0, chk, SCTP_SO_LOCKED);
5085 }
5086 if (chk->data) {
5087 sctp_m_freem(chk->data);
5088 chk->data = NULL;
5089 }
5090 }
5091 if (chk->holds_key_ref)
5092 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5093 sctp_free_remote_addr(chk->whoTo);
5094 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5095 SCTP_DECR_CHK_COUNT();
5096 /* sa_ignore FREED_MEMORY */
5097 }
5098 #ifdef INVARIANTS
5099 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5100 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5101 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5102 }
5103 }
5104 #endif
5105 /* control queue MAY not be empty */
5106 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5107 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5108 if (chk->data) {
5109 sctp_m_freem(chk->data);
5110 chk->data = NULL;
5111 }
5112 if (chk->holds_key_ref)
5113 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5114 sctp_free_remote_addr(chk->whoTo);
5115 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5116 SCTP_DECR_CHK_COUNT();
5117 /* sa_ignore FREED_MEMORY */
5118 }
5119 /* ASCONF queue MAY not be empty */
5120 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5121 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5122 if (chk->data) {
5123 sctp_m_freem(chk->data);
5124 chk->data = NULL;
5125 }
5126 if (chk->holds_key_ref)
5127 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5128 sctp_free_remote_addr(chk->whoTo);
5129 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5130 SCTP_DECR_CHK_COUNT();
5131 /* sa_ignore FREED_MEMORY */
5132 }
5133 if (asoc->mapping_array) {
5134 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5135 asoc->mapping_array = NULL;
5136 }
5137 if (asoc->nr_mapping_array) {
5138 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5139 asoc->nr_mapping_array = NULL;
5140 }
5141 /* the stream outs */
5142 if (asoc->strmout) {
5143 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5144 asoc->strmout = NULL;
5145 }
5146 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5147 if (asoc->strmin) {
5148 for (i = 0; i < asoc->streamincnt; i++) {
5149 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5150 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5151 }
5152 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5153 asoc->strmin = NULL;
5154 }
5155 asoc->streamincnt = 0;
5156 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5157 #ifdef INVARIANTS
5158 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5159 panic("no net's left alloc'ed, or list points to itself");
5160 }
5161 #endif
5162 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5163 sctp_free_remote_addr(net);
5164 }
5165 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5166 /* sa_ignore FREED_MEMORY */
5167 sctp_remove_laddr(laddr);
5168 }
5169
5170 /* pending asconf (address) parameters */
5171 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5172 /* sa_ignore FREED_MEMORY */
5173 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5174 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5175 }
5176 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5177 /* sa_ignore FREED_MEMORY */
5178 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5179 if (aack->data != NULL) {
5180 sctp_m_freem(aack->data);
5181 }
5182 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5183 }
5184 /* clean up auth stuff */
5185 if (asoc->local_hmacs)
5186 sctp_free_hmaclist(asoc->local_hmacs);
5187 if (asoc->peer_hmacs)
5188 sctp_free_hmaclist(asoc->peer_hmacs);
5189
5190 if (asoc->local_auth_chunks)
5191 sctp_free_chunklist(asoc->local_auth_chunks);
5192 if (asoc->peer_auth_chunks)
5193 sctp_free_chunklist(asoc->peer_auth_chunks);
5194
5195 sctp_free_authinfo(&asoc->authinfo);
5196
5197 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5198 LIST_REMOVE(shared_key, next);
5199 sctp_free_sharedkey(shared_key);
5200 /* sa_ignore FREED_MEMORY */
5201 }
5202
5203 /* Insert new items here :> */
5204
5205 /* Get rid of LOCK */
5206 SCTP_TCB_UNLOCK(stcb);
5207 SCTP_TCB_LOCK_DESTROY(stcb);
5208 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5209 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5210 SCTP_INP_INFO_WUNLOCK();
5211 SCTP_INP_RLOCK(inp);
5212 }
5213 #ifdef SCTP_TRACK_FREED_ASOCS
5214 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5215 /* now clean up the tasoc itself */
5216 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5217 SCTP_DECR_ASOC_COUNT();
5218 } else {
5219 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5220 }
5221 #else
5222 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5223 SCTP_DECR_ASOC_COUNT();
5224 #endif
5225 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5226 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5227 /*
5228 * If its NOT the inp_free calling us AND sctp_close
5229 * as been called, we call back...
5230 */
5231 SCTP_INP_RUNLOCK(inp);
5232 /*
5233 * This will start the kill timer (if we are the
5234 * last one) since we hold an increment yet. But
5235 * this is the only safe way to do this since
5236 * otherwise if the socket closes at the same time
5237 * we are here we might collide in the cleanup.
5238 */
5239 sctp_inpcb_free(inp,
5240 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5241 SCTP_CALLED_DIRECTLY_NOCMPSET);
5242 SCTP_INP_DECR_REF(inp);
5243 goto out_of;
5244 } else {
5245 /* The socket is still open. */
5246 SCTP_INP_DECR_REF(inp);
5247 }
5248 }
5249 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5250 SCTP_INP_RUNLOCK(inp);
5251 }
5252 out_of:
5253 /* destroyed the asoc */
5254 #ifdef SCTP_LOG_CLOSING
5255 sctp_log_closing(inp, NULL, 11);
5256 #endif
5257 return (1);
5258 }
5259
5260
5261
5262 /*
5263 * determine if a destination is "reachable" based upon the addresses bound
5264 * to the current endpoint (e.g. only v4 or v6 currently bound)
5265 */
5266 /*
5267 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5268 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5269 * types bound as its endpoint
5270 */
5271 int
5272 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5273 {
5274 struct sctp_inpcb *inp;
5275 int answer;
5276
5277 /*
5278 * No locks here, the TCB, in all cases is already locked and an
5279 * assoc is up. There is either a INP lock by the caller applied (in
5280 * asconf case when deleting an address) or NOT in the HB case,
5281 * however if HB then the INP increment is up and the INP will not
5282 * be removed (on top of the fact that we have a TCB lock). So we
5283 * only want to read the sctp_flags, which is either bound-all or
5284 * not.. no protection needed since once an assoc is up you can't be
5285 * changing your binding.
5286 */
5287 inp = stcb->sctp_ep;
5288 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5289 /* if bound all, destination is not restricted */
5290 /*
5291 * RRS: Question during lock work: Is this correct? If you
5292 * are bound-all you still might need to obey the V4--V6
5293 * flags??? IMO this bound-all stuff needs to be removed!
5294 */
5295 return (1);
5296 }
5297 /* NOTE: all "scope" checks are done when local addresses are added */
5298 switch (destaddr->sa_family) {
5299 #ifdef INET6
5300 case AF_INET6:
5301 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5302 break;
5303 #endif
5304 #ifdef INET
5305 case AF_INET:
5306 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5307 break;
5308 #endif
5309 default:
5310 /* invalid family, so it's unreachable */
5311 answer = 0;
5312 break;
5313 }
5314 return (answer);
5315 }
5316
5317 /*
5318 * update the inp_vflags on an endpoint
5319 */
5320 static void
5321 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5322 {
5323 struct sctp_laddr *laddr;
5324
5325 /* first clear the flag */
5326 inp->ip_inp.inp.inp_vflag = 0;
5327 /* set the flag based on addresses on the ep list */
5328 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5329 if (laddr->ifa == NULL) {
5330 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5331 __func__);
5332 continue;
5333 }
5334 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5335 continue;
5336 }
5337 switch (laddr->ifa->address.sa.sa_family) {
5338 #ifdef INET6
5339 case AF_INET6:
5340 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5341 break;
5342 #endif
5343 #ifdef INET
5344 case AF_INET:
5345 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5346 break;
5347 #endif
5348 default:
5349 break;
5350 }
5351 }
5352 }
5353
5354 /*
5355 * Add the address to the endpoint local address list There is nothing to be
5356 * done if we are bound to all addresses
5357 */
5358 void
5359 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5360 {
5361 struct sctp_laddr *laddr;
5362 struct sctp_tcb *stcb;
5363 int fnd, error = 0;
5364
5365 fnd = 0;
5366
5367 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5368 /* You are already bound to all. You have it already */
5369 return;
5370 }
5371 #ifdef INET6
5372 if (ifa->address.sa.sa_family == AF_INET6) {
5373 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5374 /* Can't bind a non-useable addr. */
5375 return;
5376 }
5377 }
5378 #endif
5379 /* first, is it already present? */
5380 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5381 if (laddr->ifa == ifa) {
5382 fnd = 1;
5383 break;
5384 }
5385 }
5386
5387 if (fnd == 0) {
5388 /* Not in the ep list */
5389 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5390 if (error != 0)
5391 return;
5392 inp->laddr_count++;
5393 /* update inp_vflag flags */
5394 switch (ifa->address.sa.sa_family) {
5395 #ifdef INET6
5396 case AF_INET6:
5397 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5398 break;
5399 #endif
5400 #ifdef INET
5401 case AF_INET:
5402 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5403 break;
5404 #endif
5405 default:
5406 break;
5407 }
5408 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5409 sctp_add_local_addr_restricted(stcb, ifa);
5410 }
5411 }
5412 return;
5413 }
5414
5415
5416 /*
5417 * select a new (hopefully reachable) destination net (should only be used
5418 * when we deleted an ep addr that is the only usable source address to reach
5419 * the destination net)
5420 */
5421 static void
5422 sctp_select_primary_destination(struct sctp_tcb *stcb)
5423 {
5424 struct sctp_nets *net;
5425
5426 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5427 /* for now, we'll just pick the first reachable one we find */
5428 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5429 continue;
5430 if (sctp_destination_is_reachable(stcb,
5431 (struct sockaddr *)&net->ro._l_addr)) {
5432 /* found a reachable destination */
5433 stcb->asoc.primary_destination = net;
5434 }
5435 }
5436 /* I can't there from here! ...we're gonna die shortly... */
5437 }
5438
5439
5440 /*
5441 * Delete the address from the endpoint local address list. There is nothing
5442 * to be done if we are bound to all addresses
5443 */
5444 void
5445 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5446 {
5447 struct sctp_laddr *laddr;
5448 int fnd;
5449
5450 fnd = 0;
5451 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5452 /* You are already bound to all. You have it already */
5453 return;
5454 }
5455 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5456 if (laddr->ifa == ifa) {
5457 fnd = 1;
5458 break;
5459 }
5460 }
5461 if (fnd && (inp->laddr_count < 2)) {
5462 /* can't delete unless there are at LEAST 2 addresses */
5463 return;
5464 }
5465 if (fnd) {
5466 /*
5467 * clean up any use of this address go through our
5468 * associations and clear any last_used_address that match
5469 * this one for each assoc, see if a new primary_destination
5470 * is needed
5471 */
5472 struct sctp_tcb *stcb;
5473
5474 /* clean up "next_addr_touse" */
5475 if (inp->next_addr_touse == laddr)
5476 /* delete this address */
5477 inp->next_addr_touse = NULL;
5478
5479 /* clean up "last_used_address" */
5480 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5481 struct sctp_nets *net;
5482
5483 SCTP_TCB_LOCK(stcb);
5484 if (stcb->asoc.last_used_address == laddr)
5485 /* delete this address */
5486 stcb->asoc.last_used_address = NULL;
5487 /*
5488 * Now spin through all the nets and purge any ref
5489 * to laddr
5490 */
5491 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5492 if (net->ro._s_addr == laddr->ifa) {
5493 /* Yep, purge src address selected */
5494 sctp_rtentry_t *rt;
5495
5496 /* delete this address if cached */
5497 rt = net->ro.ro_rt;
5498 if (rt != NULL) {
5499 RTFREE(rt);
5500 net->ro.ro_rt = NULL;
5501 }
5502 sctp_free_ifa(net->ro._s_addr);
5503 net->ro._s_addr = NULL;
5504 net->src_addr_selected = 0;
5505 }
5506 }
5507 SCTP_TCB_UNLOCK(stcb);
5508 } /* for each tcb */
5509 /* remove it from the ep list */
5510 sctp_remove_laddr(laddr);
5511 inp->laddr_count--;
5512 /* update inp_vflag flags */
5513 sctp_update_ep_vflag(inp);
5514 }
5515 return;
5516 }
5517
5518 /*
5519 * Add the address to the TCB local address restricted list.
5520 * This is a "pending" address list (eg. addresses waiting for an
5521 * ASCONF-ACK response) and cannot be used as a valid source address.
5522 */
5523 void
5524 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5525 {
5526 struct sctp_laddr *laddr;
5527 struct sctpladdr *list;
5528
5529 /*
5530 * Assumes TCB is locked.. and possibly the INP. May need to
5531 * confirm/fix that if we need it and is not the case.
5532 */
5533 list = &stcb->asoc.sctp_restricted_addrs;
5534
5535 #ifdef INET6
5536 if (ifa->address.sa.sa_family == AF_INET6) {
5537 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5538 /* Can't bind a non-existent addr. */
5539 return;
5540 }
5541 }
5542 #endif
5543 /* does the address already exist? */
5544 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5545 if (laddr->ifa == ifa) {
5546 return;
5547 }
5548 }
5549
5550 /* add to the list */
5551 (void)sctp_insert_laddr(list, ifa, 0);
5552 return;
5553 }
5554
5555 /*
5556 * Remove a local address from the TCB local address restricted list
5557 */
5558 void
5559 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5560 {
5561 struct sctp_inpcb *inp;
5562 struct sctp_laddr *laddr;
5563
5564 /*
5565 * This is called by asconf work. It is assumed that a) The TCB is
5566 * locked and b) The INP is locked. This is true in as much as I can
5567 * trace through the entry asconf code where I did these locks.
5568 * Again, the ASCONF code is a bit different in that it does lock
5569 * the INP during its work often times. This must be since we don't
5570 * want other proc's looking up things while what they are looking
5571 * up is changing :-D
5572 */
5573
5574 inp = stcb->sctp_ep;
5575 /* if subset bound and don't allow ASCONF's, can't delete last */
5576 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5577 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5578 if (stcb->sctp_ep->laddr_count < 2) {
5579 /* can't delete last address */
5580 return;
5581 }
5582 }
5583 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5584 /* remove the address if it exists */
5585 if (laddr->ifa == NULL)
5586 continue;
5587 if (laddr->ifa == ifa) {
5588 sctp_remove_laddr(laddr);
5589 return;
5590 }
5591 }
5592
5593 /* address not found! */
5594 return;
5595 }
5596
5597 /*
5598 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5599 */
5600 /* sysctl */
5601 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5602 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5603
5604
5605
5606 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5607 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5608 int *sctp_cpuarry = NULL;
5609 void
5610 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5611 {
5612 /* Queue a packet to a processor for the specified core */
5613 struct sctp_mcore_queue *qent;
5614 struct sctp_mcore_ctrl *wkq;
5615 int need_wake = 0;
5616
5617 if (sctp_mcore_workers == NULL) {
5618 /* Something went way bad during setup */
5619 sctp_input_with_port(m, off, 0);
5620 return;
5621 }
5622 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5623 (sizeof(struct sctp_mcore_queue)),
5624 SCTP_M_MCORE);
5625 if (qent == NULL) {
5626 /* This is trouble */
5627 sctp_input_with_port(m, off, 0);
5628 return;
5629 }
5630 qent->vn = curvnet;
5631 qent->m = m;
5632 qent->off = off;
5633 qent->v6 = 0;
5634 wkq = &sctp_mcore_workers[cpu_to_use];
5635 SCTP_MCORE_QLOCK(wkq);
5636
5637 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5638 if (wkq->running == 0) {
5639 need_wake = 1;
5640 }
5641 SCTP_MCORE_QUNLOCK(wkq);
5642 if (need_wake) {
5643 wakeup(&wkq->running);
5644 }
5645 }
5646
5647 static void
5648 sctp_mcore_thread(void *arg)
5649 {
5650
5651 struct sctp_mcore_ctrl *wkq;
5652 struct sctp_mcore_queue *qent;
5653
5654 wkq = (struct sctp_mcore_ctrl *)arg;
5655 struct mbuf *m;
5656 int off, v6;
5657
5658 /* Wait for first tickle */
5659 SCTP_MCORE_LOCK(wkq);
5660 wkq->running = 0;
5661 msleep(&wkq->running,
5662 &wkq->core_mtx,
5663 0, "wait for pkt", 0);
5664 SCTP_MCORE_UNLOCK(wkq);
5665
5666 /* Bind to our cpu */
5667 thread_lock(curthread);
5668 sched_bind(curthread, wkq->cpuid);
5669 thread_unlock(curthread);
5670
5671 /* Now lets start working */
5672 SCTP_MCORE_LOCK(wkq);
5673 /* Now grab lock and go */
5674 for (;;) {
5675 SCTP_MCORE_QLOCK(wkq);
5676 skip_sleep:
5677 wkq->running = 1;
5678 qent = TAILQ_FIRST(&wkq->que);
5679 if (qent) {
5680 TAILQ_REMOVE(&wkq->que, qent, next);
5681 SCTP_MCORE_QUNLOCK(wkq);
5682 CURVNET_SET(qent->vn);
5683 m = qent->m;
5684 off = qent->off;
5685 v6 = qent->v6;
5686 SCTP_FREE(qent, SCTP_M_MCORE);
5687 if (v6 == 0) {
5688 sctp_input_with_port(m, off, 0);
5689 } else {
5690 SCTP_PRINTF("V6 not yet supported\n");
5691 sctp_m_freem(m);
5692 }
5693 CURVNET_RESTORE();
5694 SCTP_MCORE_QLOCK(wkq);
5695 }
5696 wkq->running = 0;
5697 if (!TAILQ_EMPTY(&wkq->que)) {
5698 goto skip_sleep;
5699 }
5700 SCTP_MCORE_QUNLOCK(wkq);
5701 msleep(&wkq->running,
5702 &wkq->core_mtx,
5703 0, "wait for pkt", 0);
5704 }
5705 }
5706
5707 static void
5708 sctp_startup_mcore_threads(void)
5709 {
5710 int i, cpu;
5711
5712 if (mp_ncpus == 1)
5713 return;
5714
5715 if (sctp_mcore_workers != NULL) {
5716 /*
5717 * Already been here in some previous vnet?
5718 */
5719 return;
5720 }
5721 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5722 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5723 SCTP_M_MCORE);
5724 if (sctp_mcore_workers == NULL) {
5725 /* TSNH I hope */
5726 return;
5727 }
5728 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5729 sizeof(struct sctp_mcore_ctrl)));
5730 /* Init the structures */
5731 for (i = 0; i <= mp_maxid; i++) {
5732 TAILQ_INIT(&sctp_mcore_workers[i].que);
5733 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5734 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5735 sctp_mcore_workers[i].cpuid = i;
5736 }
5737 if (sctp_cpuarry == NULL) {
5738 SCTP_MALLOC(sctp_cpuarry, int *,
5739 (mp_ncpus * sizeof(int)),
5740 SCTP_M_MCORE);
5741 i = 0;
5742 CPU_FOREACH(cpu) {
5743 sctp_cpuarry[i] = cpu;
5744 i++;
5745 }
5746 }
5747 /* Now start them all */
5748 CPU_FOREACH(cpu) {
5749 (void)kproc_create(sctp_mcore_thread,
5750 (void *)&sctp_mcore_workers[cpu],
5751 &sctp_mcore_workers[cpu].thread_proc,
5752 RFPROC,
5753 SCTP_KTHREAD_PAGES,
5754 SCTP_MCORE_NAME);
5755
5756 }
5757 }
5758
5759 #endif
5760
5761 void
5762 sctp_pcb_init()
5763 {
5764 /*
5765 * SCTP initialization for the PCB structures should be called by
5766 * the sctp_init() function.
5767 */
5768 int i;
5769 struct timeval tv;
5770
5771 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5772 /* error I was called twice */
5773 return;
5774 }
5775 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5776
5777 #if defined(SCTP_LOCAL_TRACE_BUF)
5778 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5779 #endif
5780 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5781 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5782 ((mp_maxid + 1) * sizeof(struct sctpstat)),
5783 SCTP_M_MCORE);
5784 #endif
5785 (void)SCTP_GETTIME_TIMEVAL(&tv);
5786 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5787 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5788 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5789 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5790 #else
5791 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5792 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5793 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5794 #endif
5795 /* init the empty list of (All) Endpoints */
5796 LIST_INIT(&SCTP_BASE_INFO(listhead));
5797
5798
5799 /* init the hash table of endpoints */
5800 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5801 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5802 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5803 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5804 &SCTP_BASE_INFO(hashasocmark));
5805 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5806 &SCTP_BASE_INFO(hashmark));
5807 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5808 &SCTP_BASE_INFO(hashtcpmark));
5809 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5810
5811
5812 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5813 &SCTP_BASE_INFO(hashvrfmark));
5814
5815 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5816 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5817 /* init the zones */
5818 /*
5819 * FIX ME: Should check for NULL returns, but if it does fail we are
5820 * doomed to panic anyways... add later maybe.
5821 */
5822 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5823 sizeof(struct sctp_inpcb), maxsockets);
5824
5825 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5826 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5827
5828 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5829 sizeof(struct sctp_laddr),
5830 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5831
5832 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5833 sizeof(struct sctp_nets),
5834 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5835
5836 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5837 sizeof(struct sctp_tmit_chunk),
5838 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5839
5840 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5841 sizeof(struct sctp_queued_to_read),
5842 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5843
5844 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5845 sizeof(struct sctp_stream_queue_pending),
5846 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5847
5848 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5849 sizeof(struct sctp_asconf),
5850 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5851
5852 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5853 sizeof(struct sctp_asconf_ack),
5854 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5855
5856
5857 /* Master Lock INIT for info structure */
5858 SCTP_INP_INFO_LOCK_INIT();
5859 SCTP_STATLOG_INIT_LOCK();
5860
5861 SCTP_IPI_COUNT_INIT();
5862 SCTP_IPI_ADDR_INIT();
5863 #ifdef SCTP_PACKET_LOGGING
5864 SCTP_IP_PKTLOG_INIT();
5865 #endif
5866 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5867
5868 SCTP_WQ_ADDR_INIT();
5869 /* not sure if we need all the counts */
5870 SCTP_BASE_INFO(ipi_count_ep) = 0;
5871 /* assoc/tcb zone info */
5872 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5873 /* local addrlist zone info */
5874 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5875 /* remote addrlist zone info */
5876 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5877 /* chunk info */
5878 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5879
5880 /* socket queue zone info */
5881 SCTP_BASE_INFO(ipi_count_readq) = 0;
5882
5883 /* stream out queue cont */
5884 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5885
5886 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5887 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5888
5889 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5890
5891 /* Init the TIMEWAIT list */
5892 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5893 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5894 }
5895 sctp_startup_iterator();
5896
5897 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5898 sctp_startup_mcore_threads();
5899 #endif
5900
5901 /*
5902 * INIT the default VRF which for BSD is the only one, other O/S's
5903 * may have more. But initially they must start with one and then
5904 * add the VRF's as addresses are added.
5905 */
5906 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5907 }
5908
5909 /*
5910 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5911 */
5912 void
5913 sctp_pcb_finish(void)
5914 {
5915 struct sctp_vrflist *vrf_bucket;
5916 struct sctp_vrf *vrf, *nvrf;
5917 struct sctp_ifn *ifn, *nifn;
5918 struct sctp_ifa *ifa, *nifa;
5919 struct sctpvtaghead *chain;
5920 struct sctp_tagblock *twait_block, *prev_twait_block;
5921 struct sctp_laddr *wi, *nwi;
5922 int i;
5923 struct sctp_iterator *it, *nit;
5924
5925 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5926 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5927 return;
5928 }
5929 SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5930 /*
5931 * In FreeBSD the iterator thread never exits but we do clean up.
5932 * The only way FreeBSD reaches here is if we have VRF's but we
5933 * still add the ifdef to make it compile on old versions.
5934 */
5935 retry:
5936 SCTP_IPI_ITERATOR_WQ_LOCK();
5937 /*
5938 * sctp_iterator_worker() might be working on an it entry without
5939 * holding the lock. We won't find it on the list either and
5940 * continue and free/destroy it. While holding the lock, spin, to
5941 * avoid the race condition as sctp_iterator_worker() will have to
5942 * wait to re-aquire the lock.
5943 */
5944 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5945 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5946 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5947 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5948 DELAY(10);
5949 goto retry;
5950 }
5951 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5952 if (it->vn != curvnet) {
5953 continue;
5954 }
5955 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5956 if (it->function_atend != NULL) {
5957 (*it->function_atend) (it->pointer, it->val);
5958 }
5959 SCTP_FREE(it, SCTP_M_ITER);
5960 }
5961 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5962 SCTP_ITERATOR_LOCK();
5963 if ((sctp_it_ctl.cur_it) &&
5964 (sctp_it_ctl.cur_it->vn == curvnet)) {
5965 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5966 }
5967 SCTP_ITERATOR_UNLOCK();
5968 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5969 SCTP_WQ_ADDR_LOCK();
5970 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5971 LIST_REMOVE(wi, sctp_nxt_addr);
5972 SCTP_DECR_LADDR_COUNT();
5973 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5974 SCTP_FREE(wi->ifa, SCTP_M_IFA);
5975 }
5976 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5977 }
5978 SCTP_WQ_ADDR_UNLOCK();
5979
5980 /*
5981 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5982 * destroyed first).
5983 */
5984 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5985 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5986 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5987 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5988 /* free the ifa */
5989 LIST_REMOVE(ifa, next_bucket);
5990 LIST_REMOVE(ifa, next_ifa);
5991 SCTP_FREE(ifa, SCTP_M_IFA);
5992 }
5993 /* free the ifn */
5994 LIST_REMOVE(ifn, next_bucket);
5995 LIST_REMOVE(ifn, next_ifn);
5996 SCTP_FREE(ifn, SCTP_M_IFN);
5997 }
5998 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5999 /* free the vrf */
6000 LIST_REMOVE(vrf, next_vrf);
6001 SCTP_FREE(vrf, SCTP_M_VRF);
6002 }
6003 /* free the vrf hashes */
6004 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6005 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6006
6007 /*
6008 * free the TIMEWAIT list elements malloc'd in the function
6009 * sctp_add_vtag_to_timewait()...
6010 */
6011 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6012 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6013 if (!LIST_EMPTY(chain)) {
6014 prev_twait_block = NULL;
6015 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6016 if (prev_twait_block) {
6017 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6018 }
6019 prev_twait_block = twait_block;
6020 }
6021 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6022 }
6023 }
6024
6025 /* free the locks and mutexes */
6026 #ifdef SCTP_PACKET_LOGGING
6027 SCTP_IP_PKTLOG_DESTROY();
6028 #endif
6029 SCTP_IPI_ADDR_DESTROY();
6030 SCTP_STATLOG_DESTROY();
6031 SCTP_INP_INFO_LOCK_DESTROY();
6032
6033 SCTP_WQ_ADDR_DESTROY();
6034
6035 /* Get rid of other stuff too. */
6036 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6037 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6038 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6039 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6040 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6041 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6042
6043 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6044 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6045 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6046 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6047 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6048 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6049 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6050 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6051 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6052 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6053 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6054 #endif
6055 }
6056
6057
6058 int
6059 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6060 int offset, int limit,
6061 struct sockaddr *src, struct sockaddr *dst,
6062 struct sockaddr *altsa, uint16_t port)
6063 {
6064 /*
6065 * grub through the INIT pulling addresses and loading them to the
6066 * nets structure in the asoc. The from address in the mbuf should
6067 * also be loaded (if it is not already). This routine can be called
6068 * with either INIT or INIT-ACK's as long as the m points to the IP
6069 * packet and the offset points to the beginning of the parameters.
6070 */
6071 struct sctp_inpcb *inp;
6072 struct sctp_nets *net, *nnet, *net_tmp;
6073 struct sctp_paramhdr *phdr, parm_buf;
6074 struct sctp_tcb *stcb_tmp;
6075 uint16_t ptype, plen;
6076 struct sockaddr *sa;
6077 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6078 struct sctp_auth_random *p_random = NULL;
6079 uint16_t random_len = 0;
6080 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6081 struct sctp_auth_hmac_algo *hmacs = NULL;
6082 uint16_t hmacs_len = 0;
6083 uint8_t saw_asconf = 0;
6084 uint8_t saw_asconf_ack = 0;
6085 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6086 struct sctp_auth_chunk_list *chunks = NULL;
6087 uint16_t num_chunks = 0;
6088 sctp_key_t *new_key;
6089 uint32_t keylen;
6090 int got_random = 0, got_hmacs = 0, got_chklist = 0;
6091 uint8_t peer_supports_ecn;
6092 uint8_t peer_supports_prsctp;
6093 uint8_t peer_supports_auth;
6094 uint8_t peer_supports_asconf;
6095 uint8_t peer_supports_asconf_ack;
6096 uint8_t peer_supports_reconfig;
6097 uint8_t peer_supports_nrsack;
6098 uint8_t peer_supports_pktdrop;
6099 uint8_t peer_supports_idata;
6100
6101 #ifdef INET
6102 struct sockaddr_in sin;
6103
6104 #endif
6105 #ifdef INET6
6106 struct sockaddr_in6 sin6;
6107
6108 #endif
6109
6110 /* First get the destination address setup too. */
6111 #ifdef INET
6112 memset(&sin, 0, sizeof(sin));
6113 sin.sin_family = AF_INET;
6114 sin.sin_len = sizeof(sin);
6115 sin.sin_port = stcb->rport;
6116 #endif
6117 #ifdef INET6
6118 memset(&sin6, 0, sizeof(sin6));
6119 sin6.sin6_family = AF_INET6;
6120 sin6.sin6_len = sizeof(struct sockaddr_in6);
6121 sin6.sin6_port = stcb->rport;
6122 #endif
6123 if (altsa) {
6124 sa = altsa;
6125 } else {
6126 sa = src;
6127 }
6128 peer_supports_idata = 0;
6129 peer_supports_ecn = 0;
6130 peer_supports_prsctp = 0;
6131 peer_supports_auth = 0;
6132 peer_supports_asconf = 0;
6133 peer_supports_reconfig = 0;
6134 peer_supports_nrsack = 0;
6135 peer_supports_pktdrop = 0;
6136 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6137 /* mark all addresses that we have currently on the list */
6138 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6139 }
6140 /* does the source address already exist? if so skip it */
6141 inp = stcb->sctp_ep;
6142 atomic_add_int(&stcb->asoc.refcnt, 1);
6143 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6144 atomic_add_int(&stcb->asoc.refcnt, -1);
6145
6146 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6147 /* we must add the source address */
6148 /* no scope set here since we have a tcb already. */
6149 switch (sa->sa_family) {
6150 #ifdef INET
6151 case AF_INET:
6152 if (stcb->asoc.scope.ipv4_addr_legal) {
6153 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6154 return (-1);
6155 }
6156 }
6157 break;
6158 #endif
6159 #ifdef INET6
6160 case AF_INET6:
6161 if (stcb->asoc.scope.ipv6_addr_legal) {
6162 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6163 return (-2);
6164 }
6165 }
6166 break;
6167 #endif
6168 default:
6169 break;
6170 }
6171 } else {
6172 if (net_tmp != NULL && stcb_tmp == stcb) {
6173 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6174 } else if (stcb_tmp != stcb) {
6175 /* It belongs to another association? */
6176 if (stcb_tmp)
6177 SCTP_TCB_UNLOCK(stcb_tmp);
6178 return (-3);
6179 }
6180 }
6181 if (stcb->asoc.state == 0) {
6182 /* the assoc was freed? */
6183 return (-4);
6184 }
6185 /* now we must go through each of the params. */
6186 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6187 while (phdr) {
6188 ptype = ntohs(phdr->param_type);
6189 plen = ntohs(phdr->param_length);
6190 /*
6191 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6192 * (uint32_t)ptype, (int)plen);
6193 */
6194 if (offset + plen > limit) {
6195 break;
6196 }
6197 if (plen == 0) {
6198 break;
6199 }
6200 #ifdef INET
6201 if (ptype == SCTP_IPV4_ADDRESS) {
6202 if (stcb->asoc.scope.ipv4_addr_legal) {
6203 struct sctp_ipv4addr_param *p4, p4_buf;
6204
6205 /* ok get the v4 address and check/add */
6206 phdr = sctp_get_next_param(m, offset,
6207 (struct sctp_paramhdr *)&p4_buf,
6208 sizeof(p4_buf));
6209 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6210 phdr == NULL) {
6211 return (-5);
6212 }
6213 p4 = (struct sctp_ipv4addr_param *)phdr;
6214 sin.sin_addr.s_addr = p4->addr;
6215 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6216 /* Skip multi-cast addresses */
6217 goto next_param;
6218 }
6219 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6220 (sin.sin_addr.s_addr == INADDR_ANY)) {
6221 goto next_param;
6222 }
6223 sa = (struct sockaddr *)&sin;
6224 inp = stcb->sctp_ep;
6225 atomic_add_int(&stcb->asoc.refcnt, 1);
6226 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6227 dst, stcb);
6228 atomic_add_int(&stcb->asoc.refcnt, -1);
6229
6230 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6231 inp == NULL) {
6232 /* we must add the source address */
6233 /*
6234 * no scope set since we have a tcb
6235 * already
6236 */
6237
6238 /*
6239 * we must validate the state again
6240 * here
6241 */
6242 add_it_now:
6243 if (stcb->asoc.state == 0) {
6244 /* the assoc was freed? */
6245 return (-7);
6246 }
6247 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6248 return (-8);
6249 }
6250 } else if (stcb_tmp == stcb) {
6251 if (stcb->asoc.state == 0) {
6252 /* the assoc was freed? */
6253 return (-10);
6254 }
6255 if (net != NULL) {
6256 /* clear flag */
6257 net->dest_state &=
6258 ~SCTP_ADDR_NOT_IN_ASSOC;
6259 }
6260 } else {
6261 /*
6262 * strange, address is in another
6263 * assoc? straighten out locks.
6264 */
6265 if (stcb_tmp) {
6266 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6267 struct mbuf *op_err;
6268 char msg[SCTP_DIAG_INFO_LEN];
6269
6270 /*
6271 * in setup state we
6272 * abort this guy
6273 */
6274 snprintf(msg, sizeof(msg),
6275 "%s:%d at %s", __FILE__, __LINE__, __func__);
6276 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6277 msg);
6278 sctp_abort_an_association(stcb_tmp->sctp_ep,
6279 stcb_tmp, op_err,
6280 SCTP_SO_NOT_LOCKED);
6281 goto add_it_now;
6282 }
6283 SCTP_TCB_UNLOCK(stcb_tmp);
6284 }
6285 if (stcb->asoc.state == 0) {
6286 /* the assoc was freed? */
6287 return (-12);
6288 }
6289 return (-13);
6290 }
6291 }
6292 } else
6293 #endif
6294 #ifdef INET6
6295 if (ptype == SCTP_IPV6_ADDRESS) {
6296 if (stcb->asoc.scope.ipv6_addr_legal) {
6297 /* ok get the v6 address and check/add */
6298 struct sctp_ipv6addr_param *p6, p6_buf;
6299
6300 phdr = sctp_get_next_param(m, offset,
6301 (struct sctp_paramhdr *)&p6_buf,
6302 sizeof(p6_buf));
6303 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6304 phdr == NULL) {
6305 return (-14);
6306 }
6307 p6 = (struct sctp_ipv6addr_param *)phdr;
6308 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6309 sizeof(p6->addr));
6310 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6311 /* Skip multi-cast addresses */
6312 goto next_param;
6313 }
6314 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6315 /*
6316 * Link local make no sense without
6317 * scope
6318 */
6319 goto next_param;
6320 }
6321 sa = (struct sockaddr *)&sin6;
6322 inp = stcb->sctp_ep;
6323 atomic_add_int(&stcb->asoc.refcnt, 1);
6324 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6325 dst, stcb);
6326 atomic_add_int(&stcb->asoc.refcnt, -1);
6327 if (stcb_tmp == NULL &&
6328 (inp == stcb->sctp_ep || inp == NULL)) {
6329 /*
6330 * we must validate the state again
6331 * here
6332 */
6333 add_it_now6:
6334 if (stcb->asoc.state == 0) {
6335 /* the assoc was freed? */
6336 return (-16);
6337 }
6338 /*
6339 * we must add the address, no scope
6340 * set
6341 */
6342 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6343 return (-17);
6344 }
6345 } else if (stcb_tmp == stcb) {
6346 /*
6347 * we must validate the state again
6348 * here
6349 */
6350 if (stcb->asoc.state == 0) {
6351 /* the assoc was freed? */
6352 return (-19);
6353 }
6354 if (net != NULL) {
6355 /* clear flag */
6356 net->dest_state &=
6357 ~SCTP_ADDR_NOT_IN_ASSOC;
6358 }
6359 } else {
6360 /*
6361 * strange, address is in another
6362 * assoc? straighten out locks.
6363 */
6364 if (stcb_tmp) {
6365 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6366 struct mbuf *op_err;
6367 char msg[SCTP_DIAG_INFO_LEN];
6368
6369 /*
6370 * in setup state we
6371 * abort this guy
6372 */
6373 snprintf(msg, sizeof(msg),
6374 "%s:%d at %s", __FILE__, __LINE__, __func__);
6375 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6376 msg);
6377 sctp_abort_an_association(stcb_tmp->sctp_ep,
6378 stcb_tmp, op_err,
6379 SCTP_SO_NOT_LOCKED);
6380 goto add_it_now6;
6381 }
6382 SCTP_TCB_UNLOCK(stcb_tmp);
6383 }
6384 if (stcb->asoc.state == 0) {
6385 /* the assoc was freed? */
6386 return (-21);
6387 }
6388 return (-22);
6389 }
6390 }
6391 } else
6392 #endif
6393 if (ptype == SCTP_ECN_CAPABLE) {
6394 peer_supports_ecn = 1;
6395 } else if (ptype == SCTP_ULP_ADAPTATION) {
6396 if (stcb->asoc.state != SCTP_STATE_OPEN) {
6397 struct sctp_adaptation_layer_indication ai,
6398 *aip;
6399
6400 phdr = sctp_get_next_param(m, offset,
6401 (struct sctp_paramhdr *)&ai, sizeof(ai));
6402 aip = (struct sctp_adaptation_layer_indication *)phdr;
6403 if (aip) {
6404 stcb->asoc.peers_adaptation = ntohl(aip->indication);
6405 stcb->asoc.adaptation_needed = 1;
6406 }
6407 }
6408 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6409 struct sctp_asconf_addr_param lstore, *fee;
6410 int lptype;
6411 struct sockaddr *lsa = NULL;
6412
6413 #ifdef INET
6414 struct sctp_asconf_addrv4_param *fii;
6415
6416 #endif
6417
6418 if (stcb->asoc.asconf_supported == 0) {
6419 return (-100);
6420 }
6421 if (plen > sizeof(lstore)) {
6422 return (-23);
6423 }
6424 phdr = sctp_get_next_param(m, offset,
6425 (struct sctp_paramhdr *)&lstore,
6426 min(plen, sizeof(lstore)));
6427 if (phdr == NULL) {
6428 return (-24);
6429 }
6430 fee = (struct sctp_asconf_addr_param *)phdr;
6431 lptype = ntohs(fee->addrp.ph.param_type);
6432 switch (lptype) {
6433 #ifdef INET
6434 case SCTP_IPV4_ADDRESS:
6435 if (plen !=
6436 sizeof(struct sctp_asconf_addrv4_param)) {
6437 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6438 (int)sizeof(struct sctp_asconf_addrv4_param),
6439 plen);
6440 } else {
6441 fii = (struct sctp_asconf_addrv4_param *)fee;
6442 sin.sin_addr.s_addr = fii->addrp.addr;
6443 lsa = (struct sockaddr *)&sin;
6444 }
6445 break;
6446 #endif
6447 #ifdef INET6
6448 case SCTP_IPV6_ADDRESS:
6449 if (plen !=
6450 sizeof(struct sctp_asconf_addr_param)) {
6451 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6452 (int)sizeof(struct sctp_asconf_addr_param),
6453 plen);
6454 } else {
6455 memcpy(sin6.sin6_addr.s6_addr,
6456 fee->addrp.addr,
6457 sizeof(fee->addrp.addr));
6458 lsa = (struct sockaddr *)&sin6;
6459 }
6460 break;
6461 #endif
6462 default:
6463 break;
6464 }
6465 if (lsa) {
6466 (void)sctp_set_primary_addr(stcb, sa, NULL);
6467 }
6468 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6469 stcb->asoc.peer_supports_nat = 1;
6470 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6471 /* Peer supports pr-sctp */
6472 peer_supports_prsctp = 1;
6473 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6474 /* A supported extension chunk */
6475 struct sctp_supported_chunk_types_param *pr_supported;
6476 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6477 int num_ent, i;
6478
6479 phdr = sctp_get_next_param(m, offset,
6480 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6481 if (phdr == NULL) {
6482 return (-25);
6483 }
6484 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6485 num_ent = plen - sizeof(struct sctp_paramhdr);
6486 for (i = 0; i < num_ent; i++) {
6487 switch (pr_supported->chunk_types[i]) {
6488 case SCTP_ASCONF:
6489 peer_supports_asconf = 1;
6490 break;
6491 case SCTP_ASCONF_ACK:
6492 peer_supports_asconf_ack = 1;
6493 break;
6494 case SCTP_FORWARD_CUM_TSN:
6495 peer_supports_prsctp = 1;
6496 break;
6497 case SCTP_PACKET_DROPPED:
6498 peer_supports_pktdrop = 1;
6499 break;
6500 case SCTP_NR_SELECTIVE_ACK:
6501 peer_supports_nrsack = 1;
6502 break;
6503 case SCTP_STREAM_RESET:
6504 peer_supports_reconfig = 1;
6505 break;
6506 case SCTP_AUTHENTICATION:
6507 peer_supports_auth = 1;
6508 break;
6509 case SCTP_IDATA:
6510 peer_supports_idata = 1;
6511 break;
6512 default:
6513 /* one I have not learned yet */
6514 break;
6515
6516 }
6517 }
6518 } else if (ptype == SCTP_RANDOM) {
6519 if (plen > sizeof(random_store))
6520 break;
6521 if (got_random) {
6522 /* already processed a RANDOM */
6523 goto next_param;
6524 }
6525 phdr = sctp_get_next_param(m, offset,
6526 (struct sctp_paramhdr *)random_store,
6527 min(sizeof(random_store), plen));
6528 if (phdr == NULL)
6529 return (-26);
6530 p_random = (struct sctp_auth_random *)phdr;
6531 random_len = plen - sizeof(*p_random);
6532 /* enforce the random length */
6533 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6534 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6535 return (-27);
6536 }
6537 got_random = 1;
6538 } else if (ptype == SCTP_HMAC_LIST) {
6539 uint16_t num_hmacs;
6540 uint16_t i;
6541
6542 if (plen > sizeof(hmacs_store))
6543 break;
6544 if (got_hmacs) {
6545 /* already processed a HMAC list */
6546 goto next_param;
6547 }
6548 phdr = sctp_get_next_param(m, offset,
6549 (struct sctp_paramhdr *)hmacs_store,
6550 min(plen, sizeof(hmacs_store)));
6551 if (phdr == NULL)
6552 return (-28);
6553 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6554 hmacs_len = plen - sizeof(*hmacs);
6555 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6556 /* validate the hmac list */
6557 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6558 return (-29);
6559 }
6560 if (stcb->asoc.peer_hmacs != NULL)
6561 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6562 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6563 if (stcb->asoc.peer_hmacs != NULL) {
6564 for (i = 0; i < num_hmacs; i++) {
6565 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6566 ntohs(hmacs->hmac_ids[i]));
6567 }
6568 }
6569 got_hmacs = 1;
6570 } else if (ptype == SCTP_CHUNK_LIST) {
6571 int i;
6572
6573 if (plen > sizeof(chunks_store))
6574 break;
6575 if (got_chklist) {
6576 /* already processed a Chunks list */
6577 goto next_param;
6578 }
6579 phdr = sctp_get_next_param(m, offset,
6580 (struct sctp_paramhdr *)chunks_store,
6581 min(plen, sizeof(chunks_store)));
6582 if (phdr == NULL)
6583 return (-30);
6584 chunks = (struct sctp_auth_chunk_list *)phdr;
6585 num_chunks = plen - sizeof(*chunks);
6586 if (stcb->asoc.peer_auth_chunks != NULL)
6587 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6588 else
6589 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6590 for (i = 0; i < num_chunks; i++) {
6591 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6592 stcb->asoc.peer_auth_chunks);
6593 /* record asconf/asconf-ack if listed */
6594 if (chunks->chunk_types[i] == SCTP_ASCONF)
6595 saw_asconf = 1;
6596 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6597 saw_asconf_ack = 1;
6598
6599 }
6600 got_chklist = 1;
6601 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6602 (ptype == SCTP_STATE_COOKIE) ||
6603 (ptype == SCTP_UNRECOG_PARAM) ||
6604 (ptype == SCTP_COOKIE_PRESERVE) ||
6605 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6606 (ptype == SCTP_ADD_IP_ADDRESS) ||
6607 (ptype == SCTP_DEL_IP_ADDRESS) ||
6608 (ptype == SCTP_ERROR_CAUSE_IND) ||
6609 (ptype == SCTP_SUCCESS_REPORT)) {
6610 /* don't care */ ;
6611 } else {
6612 if ((ptype & 0x8000) == 0x0000) {
6613 /*
6614 * must stop processing the rest of the
6615 * param's. Any report bits were handled
6616 * with the call to
6617 * sctp_arethere_unrecognized_parameters()
6618 * when the INIT or INIT-ACK was first seen.
6619 */
6620 break;
6621 }
6622 }
6623
6624 next_param:
6625 offset += SCTP_SIZE32(plen);
6626 if (offset >= limit) {
6627 break;
6628 }
6629 phdr = sctp_get_next_param(m, offset, &parm_buf,
6630 sizeof(parm_buf));
6631 }
6632 /* Now check to see if we need to purge any addresses */
6633 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6634 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6635 SCTP_ADDR_NOT_IN_ASSOC) {
6636 /* This address has been removed from the asoc */
6637 /* remove and free it */
6638 stcb->asoc.numnets--;
6639 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6640 sctp_free_remote_addr(net);
6641 if (net == stcb->asoc.primary_destination) {
6642 stcb->asoc.primary_destination = NULL;
6643 sctp_select_primary_destination(stcb);
6644 }
6645 }
6646 }
6647 if ((stcb->asoc.ecn_supported == 1) &&
6648 (peer_supports_ecn == 0)) {
6649 stcb->asoc.ecn_supported = 0;
6650 }
6651 if ((stcb->asoc.prsctp_supported == 1) &&
6652 (peer_supports_prsctp == 0)) {
6653 stcb->asoc.prsctp_supported = 0;
6654 }
6655 if ((stcb->asoc.auth_supported == 1) &&
6656 ((peer_supports_auth == 0) ||
6657 (got_random == 0) || (got_hmacs == 0))) {
6658 stcb->asoc.auth_supported = 0;
6659 }
6660 if ((stcb->asoc.asconf_supported == 1) &&
6661 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6662 (stcb->asoc.auth_supported == 0) ||
6663 (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6664 stcb->asoc.asconf_supported = 0;
6665 }
6666 if ((stcb->asoc.reconfig_supported == 1) &&
6667 (peer_supports_reconfig == 0)) {
6668 stcb->asoc.reconfig_supported = 0;
6669 }
6670 if ((stcb->asoc.idata_supported == 1) &&
6671 (peer_supports_idata == 0)) {
6672 stcb->asoc.idata_supported = 0;
6673 }
6674 if ((stcb->asoc.nrsack_supported == 1) &&
6675 (peer_supports_nrsack == 0)) {
6676 stcb->asoc.nrsack_supported = 0;
6677 }
6678 if ((stcb->asoc.pktdrop_supported == 1) &&
6679 (peer_supports_pktdrop == 0)) {
6680 stcb->asoc.pktdrop_supported = 0;
6681 }
6682 /* validate authentication required parameters */
6683 if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6684 /* peer does not support auth but sent a chunks list? */
6685 return (-31);
6686 }
6687 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6688 /* peer supports asconf but not auth? */
6689 return (-32);
6690 } else if ((peer_supports_asconf == 1) &&
6691 (peer_supports_auth == 1) &&
6692 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6693 return (-33);
6694 }
6695 /* concatenate the full random key */
6696 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6697 if (chunks != NULL) {
6698 keylen += sizeof(*chunks) + num_chunks;
6699 }
6700 new_key = sctp_alloc_key(keylen);
6701 if (new_key != NULL) {
6702 /* copy in the RANDOM */
6703 if (p_random != NULL) {
6704 keylen = sizeof(*p_random) + random_len;
6705 bcopy(p_random, new_key->key, keylen);
6706 }
6707 /* append in the AUTH chunks */
6708 if (chunks != NULL) {
6709 bcopy(chunks, new_key->key + keylen,
6710 sizeof(*chunks) + num_chunks);
6711 keylen += sizeof(*chunks) + num_chunks;
6712 }
6713 /* append in the HMACs */
6714 if (hmacs != NULL) {
6715 bcopy(hmacs, new_key->key + keylen,
6716 sizeof(*hmacs) + hmacs_len);
6717 }
6718 } else {
6719 /* failed to get memory for the key */
6720 return (-34);
6721 }
6722 if (stcb->asoc.authinfo.peer_random != NULL)
6723 sctp_free_key(stcb->asoc.authinfo.peer_random);
6724 stcb->asoc.authinfo.peer_random = new_key;
6725 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6726 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6727
6728 return (0);
6729 }
6730
6731 int
6732 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6733 struct sctp_nets *net)
6734 {
6735 /* make sure the requested primary address exists in the assoc */
6736 if (net == NULL && sa)
6737 net = sctp_findnet(stcb, sa);
6738
6739 if (net == NULL) {
6740 /* didn't find the requested primary address! */
6741 return (-1);
6742 } else {
6743 /* set the primary address */
6744 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6745 /* Must be confirmed, so queue to set */
6746 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6747 return (0);
6748 }
6749 stcb->asoc.primary_destination = net;
6750 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6751 sctp_free_remote_addr(stcb->asoc.alternate);
6752 stcb->asoc.alternate = NULL;
6753 }
6754 net = TAILQ_FIRST(&stcb->asoc.nets);
6755 if (net != stcb->asoc.primary_destination) {
6756 /*
6757 * first one on the list is NOT the primary
6758 * sctp_cmpaddr() is much more efficient if the
6759 * primary is the first on the list, make it so.
6760 */
6761 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6762 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6763 }
6764 return (0);
6765 }
6766 }
6767
6768 int
6769 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6770 {
6771 /*
6772 * This function serves two purposes. It will see if a TAG can be
6773 * re-used and return 1 for yes it is ok and 0 for don't use that
6774 * tag. A secondary function it will do is purge out old tags that
6775 * can be removed.
6776 */
6777 struct sctpvtaghead *chain;
6778 struct sctp_tagblock *twait_block;
6779 struct sctpasochead *head;
6780 struct sctp_tcb *stcb;
6781 int i;
6782
6783 SCTP_INP_INFO_RLOCK();
6784 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6785 SCTP_BASE_INFO(hashasocmark))];
6786 LIST_FOREACH(stcb, head, sctp_asocs) {
6787 /*
6788 * We choose not to lock anything here. TCB's can't be
6789 * removed since we have the read lock, so they can't be
6790 * freed on us, same thing for the INP. I may be wrong with
6791 * this assumption, but we will go with it for now :-)
6792 */
6793 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6794 continue;
6795 }
6796 if (stcb->asoc.my_vtag == tag) {
6797 /* candidate */
6798 if (stcb->rport != rport) {
6799 continue;
6800 }
6801 if (stcb->sctp_ep->sctp_lport != lport) {
6802 continue;
6803 }
6804 /* Its a used tag set */
6805 SCTP_INP_INFO_RUNLOCK();
6806 return (0);
6807 }
6808 }
6809 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6810 /* Now what about timed wait ? */
6811 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6812 /*
6813 * Block(s) are present, lets see if we have this tag in the
6814 * list
6815 */
6816 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6817 if (twait_block->vtag_block[i].v_tag == 0) {
6818 /* not used */
6819 continue;
6820 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6821 now->tv_sec) {
6822 /* Audit expires this guy */
6823 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6824 twait_block->vtag_block[i].v_tag = 0;
6825 twait_block->vtag_block[i].lport = 0;
6826 twait_block->vtag_block[i].rport = 0;
6827 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6828 (twait_block->vtag_block[i].lport == lport) &&
6829 (twait_block->vtag_block[i].rport == rport)) {
6830 /* Bad tag, sorry :< */
6831 SCTP_INP_INFO_RUNLOCK();
6832 return (0);
6833 }
6834 }
6835 }
6836 SCTP_INP_INFO_RUNLOCK();
6837 return (1);
6838 }
6839
6840 static void
6841 sctp_drain_mbufs(struct sctp_tcb *stcb)
6842 {
6843 /*
6844 * We must hunt this association for MBUF's past the cumack (i.e.
6845 * out of order data that we can renege on).
6846 */
6847 struct sctp_association *asoc;
6848 struct sctp_tmit_chunk *chk, *nchk;
6849 uint32_t cumulative_tsn_p1;
6850 struct sctp_queued_to_read *ctl, *nctl;
6851 int cnt, strmat;
6852 uint32_t gap, i;
6853 int fnd = 0;
6854
6855 /* We look for anything larger than the cum-ack + 1 */
6856
6857 asoc = &stcb->asoc;
6858 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6859 /* none we can reneg on. */
6860 return;
6861 }
6862 SCTP_STAT_INCR(sctps_protocol_drains_done);
6863 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6864 cnt = 0;
6865 /* Ok that was fun, now we will drain all the inbound streams? */
6866 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6867 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
6868 #ifdef INVARIANTS
6869 if (ctl->on_strm_q != SCTP_ON_ORDERED) {
6870 panic("Huh control: %p on_q: %d -- not ordered?",
6871 ctl, ctl->on_strm_q);
6872 }
6873 #endif
6874 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6875 /* Yep it is above cum-ack */
6876 cnt++;
6877 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6878 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6879 sctp_ucount_decr(asoc->cnt_on_all_streams);
6880 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6881 if (ctl->on_read_q) {
6882 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6883 ctl->on_read_q = 0;
6884 }
6885 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
6886 ctl->on_strm_q = 0;
6887 if (ctl->data) {
6888 sctp_m_freem(ctl->data);
6889 ctl->data = NULL;
6890 }
6891 sctp_free_remote_addr(ctl->whoFrom);
6892 /* Now its reasm? */
6893 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6894 cnt++;
6895 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6896 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6897 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6898 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6899 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6900 if (chk->data) {
6901 sctp_m_freem(chk->data);
6902 chk->data = NULL;
6903 }
6904 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6905 }
6906 sctp_free_a_readq(stcb, ctl);
6907 }
6908 }
6909 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
6910 #ifdef INVARIANTS
6911 if (ctl->on_strm_q != SCTP_ON_UNORDERED) {
6912 panic("Huh control: %p on_q: %d -- not unordered?",
6913 ctl, ctl->on_strm_q);
6914 }
6915 #endif
6916 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6917 /* Yep it is above cum-ack */
6918 cnt++;
6919 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6920 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6921 sctp_ucount_decr(asoc->cnt_on_all_streams);
6922 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6923 if (ctl->on_read_q) {
6924 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6925 ctl->on_read_q = 0;
6926 }
6927 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
6928 ctl->on_strm_q = 0;
6929 if (ctl->data) {
6930 sctp_m_freem(ctl->data);
6931 ctl->data = NULL;
6932 }
6933 sctp_free_remote_addr(ctl->whoFrom);
6934 /* Now its reasm? */
6935 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6936 cnt++;
6937 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6938 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6939 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6940 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6941 TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6942 if (chk->data) {
6943 sctp_m_freem(chk->data);
6944 chk->data = NULL;
6945 }
6946 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6947 }
6948 sctp_free_a_readq(stcb, ctl);
6949 }
6950 }
6951 }
6952 if (cnt) {
6953 /* We must back down to see what the new highest is */
6954 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6955 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6956 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6957 asoc->highest_tsn_inside_map = i;
6958 fnd = 1;
6959 break;
6960 }
6961 }
6962 if (!fnd) {
6963 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6964 }
6965 /*
6966 * Question, should we go through the delivery queue? The
6967 * only reason things are on here is the app not reading OR
6968 * a p-d-api up. An attacker COULD send enough in to
6969 * initiate the PD-API and then send a bunch of stuff to
6970 * other streams... these would wind up on the delivery
6971 * queue.. and then we would not get to them. But in order
6972 * to do this I then have to back-track and un-deliver
6973 * sequence numbers in streams.. el-yucko. I think for now
6974 * we will NOT look at the delivery queue and leave it to be
6975 * something to consider later. An alternative would be to
6976 * abort the P-D-API with a notification and then deliver
6977 * the data.... Or another method might be to keep track of
6978 * how many times the situation occurs and if we see a
6979 * possible attack underway just abort the association.
6980 */
6981 #ifdef SCTP_DEBUG
6982 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6983 #endif
6984 /*
6985 * Now do we need to find a new
6986 * asoc->highest_tsn_inside_map?
6987 */
6988 asoc->last_revoke_count = cnt;
6989 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6990 /* sa_ignore NO_NULL_CHK */
6991 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6992 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6993 }
6994 /*
6995 * Another issue, in un-setting the TSN's in the mapping array we
6996 * DID NOT adjust the highest_tsn marker. This will cause one of
6997 * two things to occur. It may cause us to do extra work in checking
6998 * for our mapping array movement. More importantly it may cause us
6999 * to SACK every datagram. This may not be a bad thing though since
7000 * we will recover once we get our cum-ack above and all this stuff
7001 * we dumped recovered.
7002 */
7003 }
7004
7005 void
7006 sctp_drain()
7007 {
7008 /*
7009 * We must walk the PCB lists for ALL associations here. The system
7010 * is LOW on MBUF's and needs help. This is where reneging will
7011 * occur. We really hope this does NOT happen!
7012 */
7013 VNET_ITERATOR_DECL(vnet_iter);
7014 VNET_LIST_RLOCK_NOSLEEP();
7015 VNET_FOREACH(vnet_iter) {
7016 CURVNET_SET(vnet_iter);
7017 struct sctp_inpcb *inp;
7018 struct sctp_tcb *stcb;
7019
7020 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7021 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7022 #ifdef VIMAGE
7023 continue;
7024 #else
7025 return;
7026 #endif
7027 }
7028 SCTP_INP_INFO_RLOCK();
7029 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7030 /* For each endpoint */
7031 SCTP_INP_RLOCK(inp);
7032 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7033 /* For each association */
7034 SCTP_TCB_LOCK(stcb);
7035 sctp_drain_mbufs(stcb);
7036 SCTP_TCB_UNLOCK(stcb);
7037 }
7038 SCTP_INP_RUNLOCK(inp);
7039 }
7040 SCTP_INP_INFO_RUNLOCK();
7041 CURVNET_RESTORE();
7042 }
7043 VNET_LIST_RUNLOCK_NOSLEEP();
7044 }
7045
7046 /*
7047 * start a new iterator
7048 * iterates through all endpoints and associations based on the pcb_state
7049 * flags and asoc_state. "af" (mandatory) is executed for all matching
7050 * assocs and "ef" (optional) is executed when the iterator completes.
7051 * "inpf" (optional) is executed for each new endpoint as it is being
7052 * iterated through. inpe (optional) is called when the inp completes
7053 * its way through all the stcbs.
7054 */
7055 int
7056 sctp_initiate_iterator(inp_func inpf,
7057 asoc_func af,
7058 inp_func inpe,
7059 uint32_t pcb_state,
7060 uint32_t pcb_features,
7061 uint32_t asoc_state,
7062 void *argp,
7063 uint32_t argi,
7064 end_func ef,
7065 struct sctp_inpcb *s_inp,
7066 uint8_t chunk_output_off)
7067 {
7068 struct sctp_iterator *it = NULL;
7069
7070 if (af == NULL) {
7071 return (-1);
7072 }
7073 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7074 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7075 SCTP_BASE_VAR(sctp_pcb_initialized));
7076 return (-1);
7077 }
7078 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7079 SCTP_M_ITER);
7080 if (it == NULL) {
7081 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7082 return (ENOMEM);
7083 }
7084 memset(it, 0, sizeof(*it));
7085 it->function_assoc = af;
7086 it->function_inp = inpf;
7087 if (inpf)
7088 it->done_current_ep = 0;
7089 else
7090 it->done_current_ep = 1;
7091 it->function_atend = ef;
7092 it->pointer = argp;
7093 it->val = argi;
7094 it->pcb_flags = pcb_state;
7095 it->pcb_features = pcb_features;
7096 it->asoc_state = asoc_state;
7097 it->function_inp_end = inpe;
7098 it->no_chunk_output = chunk_output_off;
7099 it->vn = curvnet;
7100 if (s_inp) {
7101 /* Assume lock is held here */
7102 it->inp = s_inp;
7103 SCTP_INP_INCR_REF(it->inp);
7104 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7105 } else {
7106 SCTP_INP_INFO_RLOCK();
7107 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7108 if (it->inp) {
7109 SCTP_INP_INCR_REF(it->inp);
7110 }
7111 SCTP_INP_INFO_RUNLOCK();
7112 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7113
7114 }
7115 SCTP_IPI_ITERATOR_WQ_LOCK();
7116 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7117 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7118 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7119 SCTP_BASE_VAR(sctp_pcb_initialized), it);
7120 SCTP_FREE(it, SCTP_M_ITER);
7121 return (-1);
7122 }
7123 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7124 if (sctp_it_ctl.iterator_running == 0) {
7125 sctp_wakeup_iterator();
7126 }
7127 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7128 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7129 return (0);
7130 }
Cache object: 52e0865dad13d553b9c5450d70cdd9cc
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