1 /*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/7.3/sys/netinet/sctp_pcb.c 202713 2010-01-20 18:58:23Z 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/udp.h>
49
50
51 struct sctp_base_info system_base_info;
52
53 /* FIX: we don't handle multiple link local scopes */
54 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
55 #ifdef INET6
56 int
57 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
58 {
59 struct sockaddr_in6 tmp_a, tmp_b;
60
61 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
62 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone))) != 0) {
63 return 0;
64 }
65 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
66 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone))) != 0) {
67 return 0;
68 }
69 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
70 }
71
72 #endif
73
74 void
75 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
76 {
77 /*
78 * We really don't need to lock this, but I will just because it
79 * does not hurt.
80 */
81 SCTP_INP_INFO_RLOCK();
82 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
83 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
84 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
85 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
86 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
87 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
88 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
89 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
90
91 SCTP_INP_INFO_RUNLOCK();
92 }
93
94 /*
95 * Addresses are added to VRF's (Virtual Router's). For BSD we
96 * have only the default VRF 0. We maintain a hash list of
97 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
98 * these has a list of addresses. When we add a new address
99 * to a VRF we lookup the ifn/ifn_index, if the ifn does
100 * not exist we create it and add it to the list of IFN's
101 * within the VRF. Once we have the sctp_ifn, we add the
102 * address to the list. So we look something like:
103 *
104 * hash-vrf-table
105 * vrf-> ifn-> ifn -> ifn
106 * vrf |
107 * ... +--ifa-> ifa -> ifa
108 * vrf
109 *
110 * We keep these seperate lists since the SCTP subsystem will
111 * point to these from its source address selection nets structure.
112 * When an address is deleted it does not happen right away on
113 * the SCTP side, it gets scheduled. What we do when a
114 * delete happens is immediately remove the address from
115 * the master list and decrement the refcount. As our
116 * addip iterator works through and frees the src address
117 * selection pointing to the sctp_ifa, eventually the refcount
118 * will reach 0 and we will delete it. Note that it is assumed
119 * that any locking on system level ifn/ifa is done at the
120 * caller of these functions and these routines will only
121 * lock the SCTP structures as they add or delete things.
122 *
123 * Other notes on VRF concepts.
124 * - An endpoint can be in multiple VRF's
125 * - An association lives within a VRF and only one VRF.
126 * - Any incoming packet we can deduce the VRF for by
127 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
128 * - Any downward send call or connect call must supply the
129 * VRF via ancillary data or via some sort of set default
130 * VRF socket option call (again for BSD no brainer since
131 * the VRF is always 0).
132 * - An endpoint may add multiple VRF's to it.
133 * - Listening sockets can accept associations in any
134 * of the VRF's they are in but the assoc will end up
135 * in only one VRF (gotten from the packet or connect/send).
136 *
137 */
138
139 struct sctp_vrf *
140 sctp_allocate_vrf(int vrf_id)
141 {
142 struct sctp_vrf *vrf = NULL;
143 struct sctp_vrflist *bucket;
144
145 /* First allocate the VRF structure */
146 vrf = sctp_find_vrf(vrf_id);
147 if (vrf) {
148 /* Already allocated */
149 return (vrf);
150 }
151 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
152 SCTP_M_VRF);
153 if (vrf == NULL) {
154 /* No memory */
155 #ifdef INVARIANTS
156 panic("No memory for VRF:%d", vrf_id);
157 #endif
158 return (NULL);
159 }
160 /* setup the VRF */
161 memset(vrf, 0, sizeof(struct sctp_vrf));
162 vrf->vrf_id = vrf_id;
163 LIST_INIT(&vrf->ifnlist);
164 vrf->total_ifa_count = 0;
165 vrf->refcount = 0;
166 /* now also setup table ids */
167 SCTP_INIT_VRF_TABLEID(vrf);
168 /* Init the HASH of addresses */
169 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
170 &vrf->vrf_addr_hashmark);
171 if (vrf->vrf_addr_hash == NULL) {
172 /* No memory */
173 #ifdef INVARIANTS
174 panic("No memory for VRF:%d", vrf_id);
175 #endif
176 SCTP_FREE(vrf, SCTP_M_VRF);
177 return (NULL);
178 }
179 /* Add it to the hash table */
180 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
181 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
182 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
183 return (vrf);
184 }
185
186
187 struct sctp_ifn *
188 sctp_find_ifn(void *ifn, uint32_t ifn_index)
189 {
190 struct sctp_ifn *sctp_ifnp;
191 struct sctp_ifnlist *hash_ifn_head;
192
193 /*
194 * We assume the lock is held for the addresses if thats wrong
195 * problems could occur :-)
196 */
197 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
198 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
199 if (sctp_ifnp->ifn_index == ifn_index) {
200 return (sctp_ifnp);
201 }
202 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
203 return (sctp_ifnp);
204 }
205 }
206 return (NULL);
207 }
208
209
210
211 struct sctp_vrf *
212 sctp_find_vrf(uint32_t vrf_id)
213 {
214 struct sctp_vrflist *bucket;
215 struct sctp_vrf *liste;
216
217 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
218 LIST_FOREACH(liste, bucket, next_vrf) {
219 if (vrf_id == liste->vrf_id) {
220 return (liste);
221 }
222 }
223 return (NULL);
224 }
225
226 void
227 sctp_free_vrf(struct sctp_vrf *vrf)
228 {
229 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
230 /* We zero'd the count */
231 if (vrf->vrf_addr_hash) {
232 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
233 vrf->vrf_addr_hash = NULL;
234 }
235 LIST_REMOVE(vrf, next_vrf);
236 SCTP_FREE(vrf, SCTP_M_VRF);
237 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
238 }
239 }
240
241 void
242 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
243 {
244 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
245 /* We zero'd the count */
246 if (sctp_ifnp->vrf) {
247 sctp_free_vrf(sctp_ifnp->vrf);
248 }
249 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
250 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
251 }
252 }
253
254 void
255 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
256 {
257 struct sctp_ifn *sctp_ifnp;
258
259 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
260 if (sctp_ifnp != NULL) {
261 sctp_ifnp->ifn_mtu = mtu;
262 }
263 }
264
265
266 void
267 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
268 {
269 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
270 /* We zero'd the count */
271 if (sctp_ifap->ifn_p) {
272 sctp_free_ifn(sctp_ifap->ifn_p);
273 }
274 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
275 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
276 }
277 }
278
279 static void
280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
281 {
282 struct sctp_ifn *found;
283
284 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
285 if (found == NULL) {
286 /* Not in the list.. sorry */
287 return;
288 }
289 if (hold_addr_lock == 0)
290 SCTP_IPI_ADDR_WLOCK();
291 LIST_REMOVE(sctp_ifnp, next_bucket);
292 LIST_REMOVE(sctp_ifnp, next_ifn);
293 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
294 sctp_ifnp->registered_af);
295 if (hold_addr_lock == 0)
296 SCTP_IPI_ADDR_WUNLOCK();
297 /* Take away the reference, and possibly free it */
298 sctp_free_ifn(sctp_ifnp);
299 }
300
301 void
302 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
303 const char *if_name, uint32_t ifn_index)
304 {
305 struct sctp_vrf *vrf;
306 struct sctp_ifa *sctp_ifap = NULL;
307
308 SCTP_IPI_ADDR_RLOCK();
309 vrf = sctp_find_vrf(vrf_id);
310 if (vrf == NULL) {
311 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
312 goto out;
313
314 }
315 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
316 if (sctp_ifap == NULL) {
317 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
318 goto out;
319 }
320 if (sctp_ifap->ifn_p == NULL) {
321 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
322 goto out;
323 }
324 if (if_name) {
325 int len1, len2;
326
327 len1 = strlen(if_name);
328 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
329 if (len1 != len2) {
330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
331 len1, len2);
332 goto out;
333 }
334 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
335 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
336 sctp_ifap->ifn_p->ifn_name,
337 if_name);
338 goto out;
339 }
340 } else {
341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
343 sctp_ifap->ifn_p->ifn_index, ifn_index);
344 goto out;
345 }
346 }
347
348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
350 out:
351 SCTP_IPI_ADDR_RUNLOCK();
352 }
353
354 void
355 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
356 const char *if_name, uint32_t ifn_index)
357 {
358 struct sctp_vrf *vrf;
359 struct sctp_ifa *sctp_ifap = NULL;
360
361 SCTP_IPI_ADDR_RLOCK();
362 vrf = sctp_find_vrf(vrf_id);
363 if (vrf == NULL) {
364 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
365 goto out;
366
367 }
368 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
369 if (sctp_ifap == NULL) {
370 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
371 goto out;
372 }
373 if (sctp_ifap->ifn_p == NULL) {
374 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
375 goto out;
376 }
377 if (if_name) {
378 int len1, len2;
379
380 len1 = strlen(if_name);
381 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
382 if (len1 != len2) {
383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
384 len1, len2);
385 goto out;
386 }
387 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
388 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
389 sctp_ifap->ifn_p->ifn_name,
390 if_name);
391 goto out;
392 }
393 } else {
394 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
395 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
396 sctp_ifap->ifn_p->ifn_index, ifn_index);
397 goto out;
398 }
399 }
400
401 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
402 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
403 out:
404 SCTP_IPI_ADDR_RUNLOCK();
405 }
406
407 /*-
408 * Add an ifa to an ifn.
409 * Register the interface as necessary.
410 * NOTE: ADDR write lock MUST be held.
411 */
412 static void
413 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
414 {
415 int ifa_af;
416
417 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
418 sctp_ifap->ifn_p = sctp_ifnp;
419 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
420 /* update address counts */
421 sctp_ifnp->ifa_count++;
422 ifa_af = sctp_ifap->address.sa.sa_family;
423 if (ifa_af == AF_INET)
424 sctp_ifnp->num_v4++;
425 else
426 sctp_ifnp->num_v6++;
427 if (sctp_ifnp->ifa_count == 1) {
428 /* register the new interface */
429 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
430 sctp_ifnp->registered_af = ifa_af;
431 }
432 }
433
434 /*-
435 * Remove an ifa from its ifn.
436 * If no more addresses exist, remove the ifn too. Otherwise, re-register
437 * the interface based on the remaining address families left.
438 * NOTE: ADDR write lock MUST be held.
439 */
440 static void
441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
442 {
443 uint32_t ifn_index;
444
445 LIST_REMOVE(sctp_ifap, next_ifa);
446 if (sctp_ifap->ifn_p) {
447 /* update address counts */
448 sctp_ifap->ifn_p->ifa_count--;
449 if (sctp_ifap->address.sa.sa_family == AF_INET6)
450 sctp_ifap->ifn_p->num_v6--;
451 else if (sctp_ifap->address.sa.sa_family == AF_INET)
452 sctp_ifap->ifn_p->num_v4--;
453
454 ifn_index = sctp_ifap->ifn_p->ifn_index;
455 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
456 /* remove the ifn, possibly freeing it */
457 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
458 } else {
459 /* re-register address family type, if needed */
460 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
461 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
462 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
463 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
464 sctp_ifap->ifn_p->registered_af = AF_INET;
465 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
466 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
467 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
468 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
469 sctp_ifap->ifn_p->registered_af = AF_INET6;
470 }
471 /* free the ifn refcount */
472 sctp_free_ifn(sctp_ifap->ifn_p);
473 }
474 sctp_ifap->ifn_p = NULL;
475 }
476 }
477
478 struct sctp_ifa *
479 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
480 uint32_t ifn_type, const char *if_name, void *ifa,
481 struct sockaddr *addr, uint32_t ifa_flags,
482 int dynamic_add)
483 {
484 struct sctp_vrf *vrf;
485 struct sctp_ifn *sctp_ifnp = NULL;
486 struct sctp_ifa *sctp_ifap = NULL;
487 struct sctp_ifalist *hash_addr_head;
488 struct sctp_ifnlist *hash_ifn_head;
489 uint32_t hash_of_addr;
490 int new_ifn_af = 0;
491
492 #ifdef SCTP_DEBUG
493 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
494 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
495 #endif
496 SCTP_IPI_ADDR_WLOCK();
497 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
498 if (sctp_ifnp) {
499 vrf = sctp_ifnp->vrf;
500 } else {
501 vrf = sctp_find_vrf(vrf_id);
502 if (vrf == NULL) {
503 vrf = sctp_allocate_vrf(vrf_id);
504 if (vrf == NULL) {
505 SCTP_IPI_ADDR_WUNLOCK();
506 return (NULL);
507 }
508 }
509 }
510 if (sctp_ifnp == NULL) {
511 /*
512 * build one and add it, can't hold lock until after malloc
513 * done though.
514 */
515 SCTP_IPI_ADDR_WUNLOCK();
516 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
517 sizeof(struct sctp_ifn), SCTP_M_IFN);
518 if (sctp_ifnp == NULL) {
519 #ifdef INVARIANTS
520 panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
521 #endif
522 return (NULL);
523 }
524 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
525 sctp_ifnp->ifn_index = ifn_index;
526 sctp_ifnp->ifn_p = ifn;
527 sctp_ifnp->ifn_type = ifn_type;
528 sctp_ifnp->refcount = 0;
529 sctp_ifnp->vrf = vrf;
530 atomic_add_int(&vrf->refcount, 1);
531 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
532 if (if_name != NULL) {
533 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
534 } else {
535 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
536 }
537 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
538 LIST_INIT(&sctp_ifnp->ifalist);
539 SCTP_IPI_ADDR_WLOCK();
540 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
541 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
542 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
543 new_ifn_af = 1;
544 }
545 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
546 if (sctp_ifap) {
547 /* Hmm, it already exists? */
548 if ((sctp_ifap->ifn_p) &&
549 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
550 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
551 sctp_ifap->ifn_p->ifn_name, ifn_index,
552 sctp_ifap);
553 if (new_ifn_af) {
554 /* Remove the created one that we don't want */
555 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
556 }
557 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
558 /* easy to solve, just switch back to active */
559 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
560 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
561 sctp_ifap->ifn_p = sctp_ifnp;
562 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
563 }
564 exit_stage_left:
565 SCTP_IPI_ADDR_WUNLOCK();
566 return (sctp_ifap);
567 } else {
568 if (sctp_ifap->ifn_p) {
569 /*
570 * The last IFN gets the address, removee
571 * the old one
572 */
573 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
574 sctp_ifap, sctp_ifap->ifn_p->ifn_name,
575 sctp_ifap->ifn_p->ifn_index, if_name,
576 ifn_index);
577 /* remove the address from the old ifn */
578 sctp_remove_ifa_from_ifn(sctp_ifap);
579 /* move the address over to the new ifn */
580 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
581 goto exit_stage_left;
582 } else {
583 /* repair ifnp which was NULL ? */
584 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
585 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
586 sctp_ifnp, sctp_ifap);
587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
588 }
589 goto exit_stage_left;
590 }
591 }
592 SCTP_IPI_ADDR_WUNLOCK();
593 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
594 if (sctp_ifap == NULL) {
595 #ifdef INVARIANTS
596 panic("No memory for IFA");
597 #endif
598 return (NULL);
599 }
600 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
601 sctp_ifap->ifn_p = sctp_ifnp;
602 atomic_add_int(&sctp_ifnp->refcount, 1);
603 sctp_ifap->vrf_id = vrf_id;
604 sctp_ifap->ifa = ifa;
605 memcpy(&sctp_ifap->address, addr, addr->sa_len);
606 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
607 sctp_ifap->flags = ifa_flags;
608 /* Set scope */
609 switch (sctp_ifap->address.sa.sa_family) {
610 case AF_INET:
611 {
612 struct sockaddr_in *sin;
613
614 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
615 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
616 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
617 sctp_ifap->src_is_loop = 1;
618 }
619 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
620 sctp_ifap->src_is_priv = 1;
621 }
622 sctp_ifnp->num_v4++;
623 if (new_ifn_af)
624 new_ifn_af = AF_INET;
625 break;
626 }
627 #ifdef INET6
628 case AF_INET6:
629 {
630 /* ok to use deprecated addresses? */
631 struct sockaddr_in6 *sin6;
632
633 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
634 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
635 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
636 sctp_ifap->src_is_loop = 1;
637 }
638 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
639 sctp_ifap->src_is_priv = 1;
640 }
641 sctp_ifnp->num_v6++;
642 if (new_ifn_af)
643 new_ifn_af = AF_INET6;
644 break;
645 }
646 #endif
647 default:
648 new_ifn_af = 0;
649 break;
650 }
651 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
652
653 if ((sctp_ifap->src_is_priv == 0) &&
654 (sctp_ifap->src_is_loop == 0)) {
655 sctp_ifap->src_is_glob = 1;
656 }
657 SCTP_IPI_ADDR_WLOCK();
658 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
659 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
660 sctp_ifap->refcount = 1;
661 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
662 sctp_ifnp->ifa_count++;
663 vrf->total_ifa_count++;
664 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
665 if (new_ifn_af) {
666 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
667 sctp_ifnp->registered_af = new_ifn_af;
668 }
669 SCTP_IPI_ADDR_WUNLOCK();
670 if (dynamic_add) {
671 /*
672 * Bump up the refcount so that when the timer completes it
673 * will drop back down.
674 */
675 struct sctp_laddr *wi;
676
677 atomic_add_int(&sctp_ifap->refcount, 1);
678 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
679 if (wi == NULL) {
680 /*
681 * Gak, what can we do? We have lost an address
682 * change can you say HOSED?
683 */
684 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
685 /* Opps, must decrement the count */
686 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
687 if_name);
688 return (NULL);
689 }
690 SCTP_INCR_LADDR_COUNT();
691 bzero(wi, sizeof(*wi));
692 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
693 wi->ifa = sctp_ifap;
694 wi->action = SCTP_ADD_IP_ADDRESS;
695 SCTP_IPI_ITERATOR_WQ_LOCK();
696 /*
697 * Should this really be a tailq? As it is we will process
698 * the newest first :-0
699 */
700 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
701 SCTP_IPI_ITERATOR_WQ_UNLOCK();
702 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
703 (struct sctp_inpcb *)NULL,
704 (struct sctp_tcb *)NULL,
705 (struct sctp_nets *)NULL);
706 } else {
707 /* it's ready for use */
708 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
709 }
710 return (sctp_ifap);
711 }
712
713 void
714 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
715 uint32_t ifn_index, const char *if_name)
716 {
717 struct sctp_vrf *vrf;
718 struct sctp_ifa *sctp_ifap = NULL;
719
720 SCTP_IPI_ADDR_WLOCK();
721 vrf = sctp_find_vrf(vrf_id);
722 if (vrf == NULL) {
723 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
724 goto out_now;
725 }
726 #ifdef SCTP_DEBUG
727 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
728 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
729 #endif
730 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
731 if (sctp_ifap) {
732 /* Validate the delete */
733 if (sctp_ifap->ifn_p) {
734 int valid = 0;
735
736 /*-
737 * The name has priority over the ifn_index
738 * if its given. We do this especially for
739 * panda who might recycle indexes fast.
740 */
741 if (if_name) {
742 int len1, len2;
743
744 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
745 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
746 if (len1 && len2 && (len1 == len2)) {
747 /* we can compare them */
748 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
749 /*
750 * They match its a correct
751 * delete
752 */
753 valid = 1;
754 }
755 }
756 }
757 if (!valid) {
758 /* last ditch check ifn_index */
759 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
760 valid = 1;
761 }
762 }
763 if (!valid) {
764 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
765 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
767 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
768 SCTP_IPI_ADDR_WUNLOCK();
769 return;
770 }
771 }
772 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
773 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
774 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
775 vrf->total_ifa_count--;
776 LIST_REMOVE(sctp_ifap, next_bucket);
777 sctp_remove_ifa_from_ifn(sctp_ifap);
778 }
779 #ifdef SCTP_DEBUG
780 else {
781 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
782 ifn_index);
783 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
784 }
785 #endif
786
787 out_now:
788 SCTP_IPI_ADDR_WUNLOCK();
789 if (sctp_ifap) {
790 struct sctp_laddr *wi;
791
792 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
793 if (wi == NULL) {
794 /*
795 * Gak, what can we do? We have lost an address
796 * change can you say HOSED?
797 */
798 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
799
800 /* Oops, must decrement the count */
801 sctp_free_ifa(sctp_ifap);
802 return;
803 }
804 SCTP_INCR_LADDR_COUNT();
805 bzero(wi, sizeof(*wi));
806 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
807 wi->ifa = sctp_ifap;
808 wi->action = SCTP_DEL_IP_ADDRESS;
809 SCTP_IPI_ITERATOR_WQ_LOCK();
810 /*
811 * Should this really be a tailq? As it is we will process
812 * the newest first :-0
813 */
814 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
815 SCTP_IPI_ITERATOR_WQ_UNLOCK();
816
817 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
818 (struct sctp_inpcb *)NULL,
819 (struct sctp_tcb *)NULL,
820 (struct sctp_nets *)NULL);
821 }
822 return;
823 }
824
825
826 static struct sctp_tcb *
827 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
828 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
829 {
830 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
831 /*
832 * If we support the TCP model, then we must now dig through to see
833 * if we can find our endpoint in the list of tcp ep's.
834 */
835 uint16_t lport, rport;
836 struct sctppcbhead *ephead;
837 struct sctp_inpcb *inp;
838 struct sctp_laddr *laddr;
839 struct sctp_tcb *stcb;
840 struct sctp_nets *net;
841
842 if ((to == NULL) || (from == NULL)) {
843 return (NULL);
844 }
845 if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
846 lport = ((struct sockaddr_in *)to)->sin_port;
847 rport = ((struct sockaddr_in *)from)->sin_port;
848 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
849 lport = ((struct sockaddr_in6 *)to)->sin6_port;
850 rport = ((struct sockaddr_in6 *)from)->sin6_port;
851 } else {
852 return NULL;
853 }
854 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
855 /*
856 * Ok now for each of the guys in this bucket we must look and see:
857 * - Does the remote port match. - Does there single association's
858 * addresses match this address (to). If so we update p_ep to point
859 * to this ep and return the tcb from it.
860 */
861 LIST_FOREACH(inp, ephead, sctp_hash) {
862 SCTP_INP_RLOCK(inp);
863 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
864 SCTP_INP_RUNLOCK(inp);
865 continue;
866 }
867 if (lport != inp->sctp_lport) {
868 SCTP_INP_RUNLOCK(inp);
869 continue;
870 }
871 if (inp->def_vrf_id != vrf_id) {
872 SCTP_INP_RUNLOCK(inp);
873 continue;
874 }
875 /* check to see if the ep has one of the addresses */
876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
877 /* We are NOT bound all, so look further */
878 int match = 0;
879
880 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
881
882 if (laddr->ifa == NULL) {
883 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
884 continue;
885 }
886 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
887 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
888 continue;
889 }
890 if (laddr->ifa->address.sa.sa_family ==
891 to->sa_family) {
892 /* see if it matches */
893 struct sockaddr_in *intf_addr, *sin;
894
895 intf_addr = &laddr->ifa->address.sin;
896 sin = (struct sockaddr_in *)to;
897 if (from->sa_family == AF_INET) {
898 if (sin->sin_addr.s_addr ==
899 intf_addr->sin_addr.s_addr) {
900 match = 1;
901 break;
902 }
903 }
904 #ifdef INET6
905 if (from->sa_family == AF_INET6) {
906 struct sockaddr_in6 *intf_addr6;
907 struct sockaddr_in6 *sin6;
908
909 sin6 = (struct sockaddr_in6 *)
910 to;
911 intf_addr6 = &laddr->ifa->address.sin6;
912
913 if (SCTP6_ARE_ADDR_EQUAL(sin6,
914 intf_addr6)) {
915 match = 1;
916 break;
917 }
918 }
919 #endif
920 }
921 }
922 if (match == 0) {
923 /* This endpoint does not have this address */
924 SCTP_INP_RUNLOCK(inp);
925 continue;
926 }
927 }
928 /*
929 * Ok if we hit here the ep has the address, does it hold
930 * the tcb?
931 */
932
933 stcb = LIST_FIRST(&inp->sctp_asoc_list);
934 if (stcb == NULL) {
935 SCTP_INP_RUNLOCK(inp);
936 continue;
937 }
938 SCTP_TCB_LOCK(stcb);
939 if (stcb->rport != rport) {
940 /* remote port does not match. */
941 SCTP_TCB_UNLOCK(stcb);
942 SCTP_INP_RUNLOCK(inp);
943 continue;
944 }
945 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
946 SCTP_TCB_UNLOCK(stcb);
947 SCTP_INP_RUNLOCK(inp);
948 continue;
949 }
950 /* Does this TCB have a matching address? */
951 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
952
953 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
954 /* not the same family, can't be a match */
955 continue;
956 }
957 switch (from->sa_family) {
958 case AF_INET:
959 {
960 struct sockaddr_in *sin, *rsin;
961
962 sin = (struct sockaddr_in *)&net->ro._l_addr;
963 rsin = (struct sockaddr_in *)from;
964 if (sin->sin_addr.s_addr ==
965 rsin->sin_addr.s_addr) {
966 /* found it */
967 if (netp != NULL) {
968 *netp = net;
969 }
970 /*
971 * Update the endpoint
972 * pointer
973 */
974 *inp_p = inp;
975 SCTP_INP_RUNLOCK(inp);
976 return (stcb);
977 }
978 break;
979 }
980 #ifdef INET6
981 case AF_INET6:
982 {
983 struct sockaddr_in6 *sin6, *rsin6;
984
985 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
986 rsin6 = (struct sockaddr_in6 *)from;
987 if (SCTP6_ARE_ADDR_EQUAL(sin6,
988 rsin6)) {
989 /* found it */
990 if (netp != NULL) {
991 *netp = net;
992 }
993 /*
994 * Update the endpoint
995 * pointer
996 */
997 *inp_p = inp;
998 SCTP_INP_RUNLOCK(inp);
999 return (stcb);
1000 }
1001 break;
1002 }
1003 #endif
1004 default:
1005 /* TSNH */
1006 break;
1007 }
1008 }
1009 SCTP_TCB_UNLOCK(stcb);
1010 SCTP_INP_RUNLOCK(inp);
1011 }
1012 return (NULL);
1013 }
1014
1015 /*
1016 * rules for use
1017 *
1018 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1019 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1020 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1021 * NULL.
1022 */
1023
1024 struct sctp_tcb *
1025 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1026 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1027 {
1028 struct sctpasochead *head;
1029 struct sctp_inpcb *inp;
1030 struct sctp_tcb *stcb = NULL;
1031 struct sctp_nets *net;
1032 uint16_t rport;
1033
1034 inp = *inp_p;
1035 if (remote->sa_family == AF_INET) {
1036 rport = (((struct sockaddr_in *)remote)->sin_port);
1037 } else if (remote->sa_family == AF_INET6) {
1038 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1039 } else {
1040 return (NULL);
1041 }
1042 if (locked_tcb) {
1043 /*
1044 * UN-lock so we can do proper locking here this occurs when
1045 * called from load_addresses_from_init.
1046 */
1047 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1048 SCTP_TCB_UNLOCK(locked_tcb);
1049 }
1050 SCTP_INP_INFO_RLOCK();
1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1052 /*-
1053 * Now either this guy is our listener or it's the
1054 * connector. If it is the one that issued the connect, then
1055 * it's only chance is to be the first TCB in the list. If
1056 * it is the acceptor, then do the special_lookup to hash
1057 * and find the real inp.
1058 */
1059 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1060 /* to is peer addr, from is my addr */
1061 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1062 netp, inp->def_vrf_id);
1063 if ((stcb != NULL) && (locked_tcb == NULL)) {
1064 /* we have a locked tcb, lower refcount */
1065 SCTP_INP_DECR_REF(inp);
1066 }
1067 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1068 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1069 SCTP_TCB_LOCK(locked_tcb);
1070 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1071 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1072 }
1073 SCTP_INP_INFO_RUNLOCK();
1074 return (stcb);
1075 } else {
1076 SCTP_INP_WLOCK(inp);
1077 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1078 goto null_return;
1079 }
1080 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1081 if (stcb == NULL) {
1082 goto null_return;
1083 }
1084 SCTP_TCB_LOCK(stcb);
1085
1086 if (stcb->rport != rport) {
1087 /* remote port does not match. */
1088 SCTP_TCB_UNLOCK(stcb);
1089 goto null_return;
1090 }
1091 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1092 SCTP_TCB_UNLOCK(stcb);
1093 goto null_return;
1094 }
1095 /* now look at the list of remote addresses */
1096 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1097 #ifdef INVARIANTS
1098 if (net == (TAILQ_NEXT(net, sctp_next))) {
1099 panic("Corrupt net list");
1100 }
1101 #endif
1102 if (net->ro._l_addr.sa.sa_family !=
1103 remote->sa_family) {
1104 /* not the same family */
1105 continue;
1106 }
1107 switch (remote->sa_family) {
1108 case AF_INET:
1109 {
1110 struct sockaddr_in *sin,
1111 *rsin;
1112
1113 sin = (struct sockaddr_in *)
1114 &net->ro._l_addr;
1115 rsin = (struct sockaddr_in *)remote;
1116 if (sin->sin_addr.s_addr ==
1117 rsin->sin_addr.s_addr) {
1118 /* found it */
1119 if (netp != NULL) {
1120 *netp = net;
1121 }
1122 if (locked_tcb == NULL) {
1123 SCTP_INP_DECR_REF(inp);
1124 } else if (locked_tcb != stcb) {
1125 SCTP_TCB_LOCK(locked_tcb);
1126 }
1127 if (locked_tcb) {
1128 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1129 }
1130 SCTP_INP_WUNLOCK(inp);
1131 SCTP_INP_INFO_RUNLOCK();
1132 return (stcb);
1133 }
1134 break;
1135 }
1136 #ifdef INET6
1137 case AF_INET6:
1138 {
1139 struct sockaddr_in6 *sin6,
1140 *rsin6;
1141
1142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1143 rsin6 = (struct sockaddr_in6 *)remote;
1144 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1145 rsin6)) {
1146 /* found it */
1147 if (netp != NULL) {
1148 *netp = net;
1149 }
1150 if (locked_tcb == NULL) {
1151 SCTP_INP_DECR_REF(inp);
1152 } else if (locked_tcb != stcb) {
1153 SCTP_TCB_LOCK(locked_tcb);
1154 }
1155 if (locked_tcb) {
1156 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1157 }
1158 SCTP_INP_WUNLOCK(inp);
1159 SCTP_INP_INFO_RUNLOCK();
1160 return (stcb);
1161 }
1162 break;
1163 }
1164 #endif
1165 default:
1166 /* TSNH */
1167 break;
1168 }
1169 }
1170 SCTP_TCB_UNLOCK(stcb);
1171 }
1172 } else {
1173 SCTP_INP_WLOCK(inp);
1174 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1175 goto null_return;
1176 }
1177 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1178 inp->sctp_hashmark)];
1179 if (head == NULL) {
1180 goto null_return;
1181 }
1182 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1183 if (stcb->rport != rport) {
1184 /* remote port does not match */
1185 continue;
1186 }
1187 SCTP_TCB_LOCK(stcb);
1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189 SCTP_TCB_UNLOCK(stcb);
1190 continue;
1191 }
1192 /* now look at the list of remote addresses */
1193 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1194 #ifdef INVARIANTS
1195 if (net == (TAILQ_NEXT(net, sctp_next))) {
1196 panic("Corrupt net list");
1197 }
1198 #endif
1199 if (net->ro._l_addr.sa.sa_family !=
1200 remote->sa_family) {
1201 /* not the same family */
1202 continue;
1203 }
1204 switch (remote->sa_family) {
1205 case AF_INET:
1206 {
1207 struct sockaddr_in *sin,
1208 *rsin;
1209
1210 sin = (struct sockaddr_in *)
1211 &net->ro._l_addr;
1212 rsin = (struct sockaddr_in *)remote;
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 if (locked_tcb == NULL) {
1220 SCTP_INP_DECR_REF(inp);
1221 } else if (locked_tcb != stcb) {
1222 SCTP_TCB_LOCK(locked_tcb);
1223 }
1224 if (locked_tcb) {
1225 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1226 }
1227 SCTP_INP_WUNLOCK(inp);
1228 SCTP_INP_INFO_RUNLOCK();
1229 return (stcb);
1230 }
1231 break;
1232 }
1233 #ifdef INET6
1234 case AF_INET6:
1235 {
1236 struct sockaddr_in6 *sin6,
1237 *rsin6;
1238
1239 sin6 = (struct sockaddr_in6 *)
1240 &net->ro._l_addr;
1241 rsin6 = (struct sockaddr_in6 *)remote;
1242 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1243 rsin6)) {
1244 /* found it */
1245 if (netp != NULL) {
1246 *netp = net;
1247 }
1248 if (locked_tcb == NULL) {
1249 SCTP_INP_DECR_REF(inp);
1250 } else if (locked_tcb != stcb) {
1251 SCTP_TCB_LOCK(locked_tcb);
1252 }
1253 if (locked_tcb) {
1254 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1255 }
1256 SCTP_INP_WUNLOCK(inp);
1257 SCTP_INP_INFO_RUNLOCK();
1258 return (stcb);
1259 }
1260 break;
1261 }
1262 #endif
1263 default:
1264 /* TSNH */
1265 break;
1266 }
1267 }
1268 SCTP_TCB_UNLOCK(stcb);
1269 }
1270 }
1271 null_return:
1272 /* clean up for returning null */
1273 if (locked_tcb) {
1274 SCTP_TCB_LOCK(locked_tcb);
1275 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1276 }
1277 SCTP_INP_WUNLOCK(inp);
1278 SCTP_INP_INFO_RUNLOCK();
1279 /* not found */
1280 return (NULL);
1281 }
1282
1283 /*
1284 * Find an association for a specific endpoint using the association id given
1285 * out in the COMM_UP notification
1286 */
1287
1288 struct sctp_tcb *
1289 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1290 {
1291 /*
1292 * Use my the assoc_id to find a endpoint
1293 */
1294 struct sctpasochead *head;
1295 struct sctp_tcb *stcb;
1296 uint32_t id;
1297
1298 if (inp == NULL) {
1299 SCTP_PRINTF("TSNH ep_associd\n");
1300 return (NULL);
1301 }
1302 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1303 SCTP_PRINTF("TSNH ep_associd0\n");
1304 return (NULL);
1305 }
1306 id = (uint32_t) asoc_id;
1307 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1308 if (head == NULL) {
1309 /* invalid id TSNH */
1310 SCTP_PRINTF("TSNH ep_associd1\n");
1311 return (NULL);
1312 }
1313 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1314 if (stcb->asoc.assoc_id == id) {
1315 if (inp != stcb->sctp_ep) {
1316 /*
1317 * some other guy has the same id active (id
1318 * collision ??).
1319 */
1320 SCTP_PRINTF("TSNH ep_associd2\n");
1321 continue;
1322 }
1323 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1324 continue;
1325 }
1326 if (want_lock) {
1327 SCTP_TCB_LOCK(stcb);
1328 }
1329 return (stcb);
1330 }
1331 }
1332 return (NULL);
1333 }
1334
1335
1336 struct sctp_tcb *
1337 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1338 {
1339 struct sctp_tcb *stcb;
1340
1341 SCTP_INP_RLOCK(inp);
1342 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1343 SCTP_INP_RUNLOCK(inp);
1344 return (stcb);
1345 }
1346
1347
1348 static struct sctp_inpcb *
1349 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1350 uint16_t lport, uint32_t vrf_id)
1351 {
1352 struct sctp_inpcb *inp;
1353 struct sockaddr_in *sin;
1354
1355 #ifdef INET6
1356 struct sockaddr_in6 *sin6;
1357
1358 #endif
1359 struct sctp_laddr *laddr;
1360
1361 #ifdef INET6
1362 struct sockaddr_in6 *intf_addr6;
1363
1364 #endif
1365
1366 int fnd;
1367
1368 /*
1369 * Endpoing probe expects that the INP_INFO is locked.
1370 */
1371 sin = NULL;
1372 #ifdef INET6
1373 sin6 = NULL;
1374 #endif
1375 switch (nam->sa_family) {
1376 case AF_INET:
1377 sin = (struct sockaddr_in *)nam;
1378 break;
1379 #ifdef INET6
1380 case AF_INET6:
1381 sin6 = (struct sockaddr_in6 *)nam;
1382 break;
1383 #endif
1384 default:
1385 /* unsupported family */
1386 return (NULL);
1387 }
1388
1389 if (head == NULL)
1390 return (NULL);
1391
1392 LIST_FOREACH(inp, head, sctp_hash) {
1393 SCTP_INP_RLOCK(inp);
1394 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1395 SCTP_INP_RUNLOCK(inp);
1396 continue;
1397 }
1398 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1399 (inp->sctp_lport == lport)) {
1400 /* got it */
1401 if ((nam->sa_family == AF_INET) &&
1402 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1403 SCTP_IPV6_V6ONLY(inp)) {
1404 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1405 SCTP_INP_RUNLOCK(inp);
1406 continue;
1407 }
1408 /* A V6 address and the endpoint is NOT bound V6 */
1409 if (nam->sa_family == AF_INET6 &&
1410 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1411 SCTP_INP_RUNLOCK(inp);
1412 continue;
1413 }
1414 /* does a VRF id match? */
1415 fnd = 0;
1416 if (inp->def_vrf_id == vrf_id)
1417 fnd = 1;
1418
1419 SCTP_INP_RUNLOCK(inp);
1420 if (!fnd)
1421 continue;
1422 return (inp);
1423 }
1424 SCTP_INP_RUNLOCK(inp);
1425 }
1426 if ((nam->sa_family == AF_INET) &&
1427 (sin->sin_addr.s_addr == INADDR_ANY)) {
1428 /* Can't hunt for one that has no address specified */
1429 return (NULL);
1430 }
1431 #ifdef INET6
1432 if ((nam->sa_family == AF_INET6) &&
1433 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1434 /* Can't hunt for one that has no address specified */
1435 return (NULL);
1436 }
1437 #endif
1438 /*
1439 * ok, not bound to all so see if we can find a EP bound to this
1440 * address.
1441 */
1442 LIST_FOREACH(inp, head, sctp_hash) {
1443 SCTP_INP_RLOCK(inp);
1444 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1445 SCTP_INP_RUNLOCK(inp);
1446 continue;
1447 }
1448 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1449 SCTP_INP_RUNLOCK(inp);
1450 continue;
1451 }
1452 /*
1453 * Ok this could be a likely candidate, look at all of its
1454 * addresses
1455 */
1456 if (inp->sctp_lport != lport) {
1457 SCTP_INP_RUNLOCK(inp);
1458 continue;
1459 }
1460 /* does a VRF id match? */
1461 fnd = 0;
1462 if (inp->def_vrf_id == vrf_id)
1463 fnd = 1;
1464
1465 if (!fnd) {
1466 SCTP_INP_RUNLOCK(inp);
1467 continue;
1468 }
1469 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1470 if (laddr->ifa == NULL) {
1471 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1472 __FUNCTION__);
1473 continue;
1474 }
1475 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1476 laddr->ifa);
1477 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1478 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1479 continue;
1480 }
1481 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1482 /* possible, see if it matches */
1483 struct sockaddr_in *intf_addr;
1484
1485 intf_addr = &laddr->ifa->address.sin;
1486 switch (nam->sa_family) {
1487 case AF_INET:
1488 if (sin->sin_addr.s_addr ==
1489 intf_addr->sin_addr.s_addr) {
1490 SCTP_INP_RUNLOCK(inp);
1491 return (inp);
1492 }
1493 break;
1494 #ifdef INET6
1495 case AF_INET6:
1496 intf_addr6 = &laddr->ifa->address.sin6;
1497 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1498 intf_addr6)) {
1499 SCTP_INP_RUNLOCK(inp);
1500 return (inp);
1501 }
1502 break;
1503 #endif
1504 }
1505 }
1506 }
1507 SCTP_INP_RUNLOCK(inp);
1508 }
1509 return (NULL);
1510 }
1511
1512
1513 static struct sctp_inpcb *
1514 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1515 {
1516 struct sctppcbhead *head;
1517 struct sctp_inpcb *t_inp;
1518 int fnd;
1519
1520 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1521 SCTP_BASE_INFO(hashmark))];
1522 LIST_FOREACH(t_inp, head, sctp_hash) {
1523 if (t_inp->sctp_lport != lport) {
1524 continue;
1525 }
1526 /* is it in the VRF in question */
1527 fnd = 0;
1528 if (t_inp->def_vrf_id == vrf_id)
1529 fnd = 1;
1530 if (!fnd)
1531 continue;
1532
1533 /* This one is in use. */
1534 /* check the v6/v4 binding issue */
1535 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1536 SCTP_IPV6_V6ONLY(t_inp)) {
1537 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1538 /* collision in V6 space */
1539 return (t_inp);
1540 } else {
1541 /* inp is BOUND_V4 no conflict */
1542 continue;
1543 }
1544 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1545 /* t_inp is bound v4 and v6, conflict always */
1546 return (t_inp);
1547 } else {
1548 /* t_inp is bound only V4 */
1549 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1550 SCTP_IPV6_V6ONLY(inp)) {
1551 /* no conflict */
1552 continue;
1553 }
1554 /* else fall through to conflict */
1555 }
1556 return (t_inp);
1557 }
1558 return (NULL);
1559 }
1560
1561
1562 int
1563 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1564 {
1565 /* For 1-2-1 with port reuse */
1566 struct sctppcbhead *head;
1567 struct sctp_inpcb *tinp;
1568
1569 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1570 /* only works with port reuse on */
1571 return (-1);
1572 }
1573 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1574 return (0);
1575 }
1576 SCTP_INP_RUNLOCK(inp);
1577 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1578 SCTP_BASE_INFO(hashmark))];
1579 /* Kick out all non-listeners to the TCP hash */
1580 LIST_FOREACH(tinp, head, sctp_hash) {
1581 if (tinp->sctp_lport != inp->sctp_lport) {
1582 continue;
1583 }
1584 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1585 continue;
1586 }
1587 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1588 continue;
1589 }
1590 if (tinp->sctp_socket->so_qlimit) {
1591 continue;
1592 }
1593 SCTP_INP_WLOCK(tinp);
1594 LIST_REMOVE(tinp, sctp_hash);
1595 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1596 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1597 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1598 SCTP_INP_WUNLOCK(tinp);
1599 }
1600 SCTP_INP_WLOCK(inp);
1601 /* Pull from where he was */
1602 LIST_REMOVE(inp, sctp_hash);
1603 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1604 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1605 LIST_INSERT_HEAD(head, inp, sctp_hash);
1606 SCTP_INP_WUNLOCK(inp);
1607 SCTP_INP_RLOCK(inp);
1608 return (0);
1609 }
1610
1611
1612 struct sctp_inpcb *
1613 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1614 uint32_t vrf_id)
1615 {
1616 /*
1617 * First we check the hash table to see if someone has this port
1618 * bound with just the port.
1619 */
1620 struct sctp_inpcb *inp;
1621 struct sctppcbhead *head;
1622 struct sockaddr_in *sin;
1623 struct sockaddr_in6 *sin6;
1624 int lport;
1625
1626 if (nam->sa_family == AF_INET) {
1627 sin = (struct sockaddr_in *)nam;
1628 lport = ((struct sockaddr_in *)nam)->sin_port;
1629 } else if (nam->sa_family == AF_INET6) {
1630 sin6 = (struct sockaddr_in6 *)nam;
1631 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1632 } else {
1633 /* unsupported family */
1634 return (NULL);
1635 }
1636 /*
1637 * I could cheat here and just cast to one of the types but we will
1638 * do it right. It also provides the check against an Unsupported
1639 * type too.
1640 */
1641 /* Find the head of the ALLADDR chain */
1642 if (have_lock == 0) {
1643 SCTP_INP_INFO_RLOCK();
1644 }
1645 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1646 SCTP_BASE_INFO(hashmark))];
1647 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1648
1649 /*
1650 * If the TCP model exists it could be that the main listening
1651 * endpoint is gone but there exists a connected socket for this guy
1652 * yet. If so we can return the first one that we find. This may NOT
1653 * be the correct one so the caller should be wary on the return
1654 * INP. Currently the onlyc caller that sets this flag is in bindx
1655 * where we are verifying that a user CAN bind the address. He
1656 * either has bound it already, or someone else has, or its open to
1657 * bind, so this is good enough.
1658 */
1659 if (inp == NULL && find_tcp_pool) {
1660 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1661 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1662 }
1663 if (inp) {
1664 SCTP_INP_INCR_REF(inp);
1665 }
1666 if (have_lock == 0) {
1667 SCTP_INP_INFO_RUNLOCK();
1668 }
1669 return (inp);
1670 }
1671
1672 /*
1673 * Find an association for an endpoint with the pointer to whom you want to
1674 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1675 * need to change the *to to some other struct like a mbuf...
1676 */
1677 struct sctp_tcb *
1678 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1679 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1680 uint32_t vrf_id)
1681 {
1682 struct sctp_inpcb *inp = NULL;
1683 struct sctp_tcb *retval;
1684
1685 SCTP_INP_INFO_RLOCK();
1686 if (find_tcp_pool) {
1687 if (inp_p != NULL) {
1688 retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1689 vrf_id);
1690 } else {
1691 retval = sctp_tcb_special_locate(&inp, from, to, netp,
1692 vrf_id);
1693 }
1694 if (retval != NULL) {
1695 SCTP_INP_INFO_RUNLOCK();
1696 return (retval);
1697 }
1698 }
1699 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1700 if (inp_p != NULL) {
1701 *inp_p = inp;
1702 }
1703 SCTP_INP_INFO_RUNLOCK();
1704
1705 if (inp == NULL) {
1706 return (NULL);
1707 }
1708 /*
1709 * ok, we have an endpoint, now lets find the assoc for it (if any)
1710 * we now place the source address or from in the to of the find
1711 * endpoint call. Since in reality this chain is used from the
1712 * inbound packet side.
1713 */
1714 if (inp_p != NULL) {
1715 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1716 NULL);
1717 } else {
1718 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1719 NULL);
1720 }
1721 return retval;
1722 }
1723
1724
1725 /*
1726 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1727 * find all addresses that the sender has specified in any address list. Each
1728 * address will be used to lookup the TCB and see if one exits.
1729 */
1730 static struct sctp_tcb *
1731 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1732 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1733 struct sockaddr *dest)
1734 {
1735 struct sockaddr_in sin4;
1736 struct sockaddr_in6 sin6;
1737 struct sctp_paramhdr *phdr, parm_buf;
1738 struct sctp_tcb *retval;
1739 uint32_t ptype, plen;
1740
1741 memset(&sin4, 0, sizeof(sin4));
1742 memset(&sin6, 0, sizeof(sin6));
1743 sin4.sin_len = sizeof(sin4);
1744 sin4.sin_family = AF_INET;
1745 sin4.sin_port = sh->src_port;
1746 sin6.sin6_len = sizeof(sin6);
1747 sin6.sin6_family = AF_INET6;
1748 sin6.sin6_port = sh->src_port;
1749
1750 retval = NULL;
1751 offset += sizeof(struct sctp_init_chunk);
1752
1753 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1754 while (phdr != NULL) {
1755 /* now we must see if we want the parameter */
1756 ptype = ntohs(phdr->param_type);
1757 plen = ntohs(phdr->param_length);
1758 if (plen == 0) {
1759 break;
1760 }
1761 if (ptype == SCTP_IPV4_ADDRESS &&
1762 plen == sizeof(struct sctp_ipv4addr_param)) {
1763 /* Get the rest of the address */
1764 struct sctp_ipv4addr_param ip4_parm, *p4;
1765
1766 phdr = sctp_get_next_param(m, offset,
1767 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1768 if (phdr == NULL) {
1769 return (NULL);
1770 }
1771 p4 = (struct sctp_ipv4addr_param *)phdr;
1772 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1773 /* look it up */
1774 retval = sctp_findassociation_ep_addr(inp_p,
1775 (struct sockaddr *)&sin4, netp, dest, NULL);
1776 if (retval != NULL) {
1777 return (retval);
1778 }
1779 } else if (ptype == SCTP_IPV6_ADDRESS &&
1780 plen == sizeof(struct sctp_ipv6addr_param)) {
1781 /* Get the rest of the address */
1782 struct sctp_ipv6addr_param ip6_parm, *p6;
1783
1784 phdr = sctp_get_next_param(m, offset,
1785 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1786 if (phdr == NULL) {
1787 return (NULL);
1788 }
1789 p6 = (struct sctp_ipv6addr_param *)phdr;
1790 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1791 /* look it up */
1792 retval = sctp_findassociation_ep_addr(inp_p,
1793 (struct sockaddr *)&sin6, netp, dest, NULL);
1794 if (retval != NULL) {
1795 return (retval);
1796 }
1797 }
1798 offset += SCTP_SIZE32(plen);
1799 phdr = sctp_get_next_param(m, offset, &parm_buf,
1800 sizeof(parm_buf));
1801 }
1802 return (NULL);
1803 }
1804
1805 static int
1806 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1807 {
1808 struct sctp_nets *net;
1809
1810 /*
1811 * Simple question, the ports match, does the tcb own the to
1812 * address?
1813 */
1814 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1815 /* of course */
1816 return (1);
1817 }
1818 /* have to look at all bound addresses */
1819 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1820 if (net->ro._l_addr.sa.sa_family != to->sa_family) {
1821 /* not the same family, can't be a match */
1822 continue;
1823 }
1824 switch (to->sa_family) {
1825 case AF_INET:
1826 {
1827 struct sockaddr_in *sin, *rsin;
1828
1829 sin = (struct sockaddr_in *)&net->ro._l_addr;
1830 rsin = (struct sockaddr_in *)to;
1831 if (sin->sin_addr.s_addr ==
1832 rsin->sin_addr.s_addr) {
1833 /* found it */
1834 return (1);
1835 }
1836 break;
1837 }
1838 #ifdef INET6
1839 case AF_INET6:
1840 {
1841 struct sockaddr_in6 *sin6, *rsin6;
1842
1843 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1844 rsin6 = (struct sockaddr_in6 *)to;
1845 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1846 rsin6)) {
1847 /* Update the endpoint pointer */
1848 return (1);
1849 }
1850 break;
1851 }
1852 #endif
1853 default:
1854 /* TSNH */
1855 break;
1856 }
1857 }
1858 /* Nope, do not have the address ;-( */
1859 return (0);
1860 }
1861
1862 static struct sctp_tcb *
1863 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1864 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1865 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1866 {
1867 /*
1868 * Use my vtag to hash. If we find it we then verify the source addr
1869 * is in the assoc. If all goes well we save a bit on rec of a
1870 * packet.
1871 */
1872 struct sctpasochead *head;
1873 struct sctp_nets *net;
1874 struct sctp_tcb *stcb;
1875
1876 *netp = NULL;
1877 *inp_p = NULL;
1878 SCTP_INP_INFO_RLOCK();
1879 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1880 SCTP_BASE_INFO(hashasocmark))];
1881 if (head == NULL) {
1882 /* invalid vtag */
1883 SCTP_INP_INFO_RUNLOCK();
1884 return (NULL);
1885 }
1886 LIST_FOREACH(stcb, head, sctp_asocs) {
1887 SCTP_INP_RLOCK(stcb->sctp_ep);
1888 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1890 continue;
1891 }
1892 SCTP_TCB_LOCK(stcb);
1893 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1894 if (stcb->asoc.my_vtag == vtag) {
1895 /* candidate */
1896 if (stcb->rport != rport) {
1897 SCTP_TCB_UNLOCK(stcb);
1898 continue;
1899 }
1900 if (stcb->sctp_ep->sctp_lport != lport) {
1901 SCTP_TCB_UNLOCK(stcb);
1902 continue;
1903 }
1904 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1905 SCTP_TCB_UNLOCK(stcb);
1906 continue;
1907 }
1908 /* RRS:Need toaddr check here */
1909 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
1910 /* Endpoint does not own this address */
1911 SCTP_TCB_UNLOCK(stcb);
1912 continue;
1913 }
1914 if (remote_tag) {
1915 /*
1916 * If we have both vtags thats all we match
1917 * on
1918 */
1919 if (stcb->asoc.peer_vtag == remote_tag) {
1920 /*
1921 * If both tags match we consider it
1922 * conclusive and check NO
1923 * source/destination addresses
1924 */
1925 goto conclusive;
1926 }
1927 }
1928 if (skip_src_check) {
1929 conclusive:
1930 if (from) {
1931 net = sctp_findnet(stcb, from);
1932 } else {
1933 *netp = NULL; /* unknown */
1934 }
1935 if (inp_p)
1936 *inp_p = stcb->sctp_ep;
1937 SCTP_INP_INFO_RUNLOCK();
1938 return (stcb);
1939 }
1940 net = sctp_findnet(stcb, from);
1941 if (net) {
1942 /* yep its him. */
1943 *netp = net;
1944 SCTP_STAT_INCR(sctps_vtagexpress);
1945 *inp_p = stcb->sctp_ep;
1946 SCTP_INP_INFO_RUNLOCK();
1947 return (stcb);
1948 } else {
1949 /*
1950 * not him, this should only happen in rare
1951 * cases so I peg it.
1952 */
1953 SCTP_STAT_INCR(sctps_vtagbogus);
1954 }
1955 }
1956 SCTP_TCB_UNLOCK(stcb);
1957 }
1958 SCTP_INP_INFO_RUNLOCK();
1959 return (NULL);
1960 }
1961
1962 /*
1963 * Find an association with the pointer to the inbound IP packet. This can be
1964 * a IPv4 or IPv6 packet.
1965 */
1966 struct sctp_tcb *
1967 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1968 struct sctphdr *sh, struct sctp_chunkhdr *ch,
1969 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1970 {
1971 int find_tcp_pool;
1972 struct ip *iph;
1973 struct sctp_tcb *retval;
1974 struct sockaddr_storage to_store, from_store;
1975 struct sockaddr *to = (struct sockaddr *)&to_store;
1976 struct sockaddr *from = (struct sockaddr *)&from_store;
1977 struct sctp_inpcb *inp;
1978
1979 iph = mtod(m, struct ip *);
1980 switch (iph->ip_v) {
1981 case IPVERSION:
1982 {
1983 /* its IPv4 */
1984 struct sockaddr_in *from4;
1985
1986 from4 = (struct sockaddr_in *)&from_store;
1987 bzero(from4, sizeof(*from4));
1988 from4->sin_family = AF_INET;
1989 from4->sin_len = sizeof(struct sockaddr_in);
1990 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1991 from4->sin_port = sh->src_port;
1992 break;
1993 }
1994 #ifdef INET6
1995 case IPV6_VERSION >> 4:
1996 {
1997 /* its IPv6 */
1998 struct ip6_hdr *ip6;
1999 struct sockaddr_in6 *from6;
2000
2001 ip6 = mtod(m, struct ip6_hdr *);
2002 from6 = (struct sockaddr_in6 *)&from_store;
2003 bzero(from6, sizeof(*from6));
2004 from6->sin6_family = AF_INET6;
2005 from6->sin6_len = sizeof(struct sockaddr_in6);
2006 from6->sin6_addr = ip6->ip6_src;
2007 from6->sin6_port = sh->src_port;
2008 /* Get the scopes in properly to the sin6 addr's */
2009 /* we probably don't need these operations */
2010 (void)sa6_recoverscope(from6);
2011 sa6_embedscope(from6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)));
2012 break;
2013 }
2014 #endif
2015 default:
2016 /* Currently not supported. */
2017 return (NULL);
2018 }
2019
2020
2021 switch (iph->ip_v) {
2022 case IPVERSION:
2023 {
2024 /* its IPv4 */
2025 struct sockaddr_in *to4;
2026
2027 to4 = (struct sockaddr_in *)&to_store;
2028 bzero(to4, sizeof(*to4));
2029 to4->sin_family = AF_INET;
2030 to4->sin_len = sizeof(struct sockaddr_in);
2031 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2032 to4->sin_port = sh->dest_port;
2033 break;
2034 }
2035 #ifdef INET6
2036 case IPV6_VERSION >> 4:
2037 {
2038 /* its IPv6 */
2039 struct ip6_hdr *ip6;
2040 struct sockaddr_in6 *to6;
2041
2042 ip6 = mtod(m, struct ip6_hdr *);
2043 to6 = (struct sockaddr_in6 *)&to_store;
2044 bzero(to6, sizeof(*to6));
2045 to6->sin6_family = AF_INET6;
2046 to6->sin6_len = sizeof(struct sockaddr_in6);
2047 to6->sin6_addr = ip6->ip6_dst;
2048 to6->sin6_port = sh->dest_port;
2049 /* Get the scopes in properly to the sin6 addr's */
2050 /* we probably don't need these operations */
2051 (void)sa6_recoverscope(to6);
2052 sa6_embedscope(to6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)));
2053 break;
2054 }
2055 #endif
2056 default:
2057 /* TSNH */
2058 break;
2059 }
2060 if (sh->v_tag) {
2061 /* we only go down this path if vtag is non-zero */
2062 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2063 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2064 if (retval) {
2065 return (retval);
2066 }
2067 }
2068 find_tcp_pool = 0;
2069 if ((ch->chunk_type != SCTP_INITIATION) &&
2070 (ch->chunk_type != SCTP_INITIATION_ACK) &&
2071 (ch->chunk_type != SCTP_COOKIE_ACK) &&
2072 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2073 /* Other chunk types go to the tcp pool. */
2074 find_tcp_pool = 1;
2075 }
2076 if (inp_p) {
2077 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2078 find_tcp_pool, vrf_id);
2079 inp = *inp_p;
2080 } else {
2081 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2082 find_tcp_pool, vrf_id);
2083 }
2084 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2085 if (retval == NULL && inp) {
2086 /* Found a EP but not this address */
2087 if ((ch->chunk_type == SCTP_INITIATION) ||
2088 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2089 /*-
2090 * special hook, we do NOT return linp or an
2091 * association that is linked to an existing
2092 * association that is under the TCP pool (i.e. no
2093 * listener exists). The endpoint finding routine
2094 * will always find a listner before examining the
2095 * TCP pool.
2096 */
2097 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2098 if (inp_p) {
2099 *inp_p = NULL;
2100 }
2101 return (NULL);
2102 }
2103 retval = sctp_findassociation_special_addr(m, iphlen,
2104 offset, sh, &inp, netp, to);
2105 if (inp_p != NULL) {
2106 *inp_p = inp;
2107 }
2108 }
2109 }
2110 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2111 return (retval);
2112 }
2113
2114 /*
2115 * lookup an association by an ASCONF lookup address.
2116 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2117 */
2118 struct sctp_tcb *
2119 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2120 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2121 {
2122 struct sctp_tcb *stcb;
2123 struct sockaddr_in *sin;
2124
2125 #ifdef INET6
2126 struct sockaddr_in6 *sin6;
2127
2128 #endif
2129 struct sockaddr_storage local_store, remote_store;
2130 struct sockaddr *to;
2131 struct ip *iph;
2132
2133 #ifdef INET6
2134 struct ip6_hdr *ip6;
2135
2136 #endif
2137 struct sctp_paramhdr parm_buf, *phdr;
2138 int ptype;
2139 int zero_address = 0;
2140
2141
2142 memset(&local_store, 0, sizeof(local_store));
2143 memset(&remote_store, 0, sizeof(remote_store));
2144 to = (struct sockaddr *)&local_store;
2145 /* First get the destination address setup too. */
2146 iph = mtod(m, struct ip *);
2147 switch (iph->ip_v) {
2148 case IPVERSION:
2149 /* its IPv4 */
2150 sin = (struct sockaddr_in *)&local_store;
2151 sin->sin_family = AF_INET;
2152 sin->sin_len = sizeof(*sin);
2153 sin->sin_port = sh->dest_port;
2154 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2155 break;
2156 #ifdef INET6
2157 case IPV6_VERSION >> 4:
2158 /* its IPv6 */
2159 ip6 = mtod(m, struct ip6_hdr *);
2160 sin6 = (struct sockaddr_in6 *)&local_store;
2161 sin6->sin6_family = AF_INET6;
2162 sin6->sin6_len = sizeof(*sin6);
2163 sin6->sin6_port = sh->dest_port;
2164 sin6->sin6_addr = ip6->ip6_dst;
2165 break;
2166 #endif
2167 default:
2168 return NULL;
2169 }
2170
2171 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2172 &parm_buf, sizeof(struct sctp_paramhdr));
2173 if (phdr == NULL) {
2174 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2175 __FUNCTION__);
2176 return NULL;
2177 }
2178 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2179 /* get the correlation address */
2180 switch (ptype) {
2181 #ifdef INET6
2182 case SCTP_IPV6_ADDRESS:
2183 {
2184 /* ipv6 address param */
2185 struct sctp_ipv6addr_param *p6, p6_buf;
2186
2187 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2188 return NULL;
2189 }
2190 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2191 offset + sizeof(struct sctp_asconf_chunk),
2192 &p6_buf.ph, sizeof(*p6));
2193 if (p6 == NULL) {
2194 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2195 __FUNCTION__);
2196 return (NULL);
2197 }
2198 sin6 = (struct sockaddr_in6 *)&remote_store;
2199 sin6->sin6_family = AF_INET6;
2200 sin6->sin6_len = sizeof(*sin6);
2201 sin6->sin6_port = sh->src_port;
2202 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2203 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2204 zero_address = 1;
2205 break;
2206 }
2207 #endif
2208 case SCTP_IPV4_ADDRESS:
2209 {
2210 /* ipv4 address param */
2211 struct sctp_ipv4addr_param *p4, p4_buf;
2212
2213 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2214 return NULL;
2215 }
2216 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2217 offset + sizeof(struct sctp_asconf_chunk),
2218 &p4_buf.ph, sizeof(*p4));
2219 if (p4 == NULL) {
2220 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2221 __FUNCTION__);
2222 return (NULL);
2223 }
2224 sin = (struct sockaddr_in *)&remote_store;
2225 sin->sin_family = AF_INET;
2226 sin->sin_len = sizeof(*sin);
2227 sin->sin_port = sh->src_port;
2228 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2229 if (sin->sin_addr.s_addr == INADDR_ANY)
2230 zero_address = 1;
2231 break;
2232 }
2233 default:
2234 /* invalid address param type */
2235 return NULL;
2236 }
2237
2238 if (zero_address) {
2239 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2240 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2241 /*
2242 * printf("findassociation_ep_asconf: zero lookup address
2243 * finds stcb 0x%x\n", (uint32_t)stcb);
2244 */
2245 } else {
2246 stcb = sctp_findassociation_ep_addr(inp_p,
2247 (struct sockaddr *)&remote_store, netp,
2248 to, NULL);
2249 }
2250 return (stcb);
2251 }
2252
2253
2254 /*
2255 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2256 * addresses. This way if we don't get a bind we by default pick a ephemeral
2257 * port with all addresses bound.
2258 */
2259 int
2260 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2261 {
2262 /*
2263 * we get called when a new endpoint starts up. We need to allocate
2264 * the sctp_inpcb structure from the zone and init it. Mark it as
2265 * unbound and find a port that we can use as an ephemeral with
2266 * INADDR_ANY. If the user binds later no problem we can then add in
2267 * the specific addresses. And setup the default parameters for the
2268 * EP.
2269 */
2270 int i, error;
2271 struct sctp_inpcb *inp;
2272 struct sctp_pcb *m;
2273 struct timeval time;
2274 sctp_sharedkey_t *null_key;
2275
2276 error = 0;
2277
2278 SCTP_INP_INFO_WLOCK();
2279 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2280 if (inp == NULL) {
2281 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2282 SCTP_INP_INFO_WUNLOCK();
2283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2284 return (ENOBUFS);
2285 }
2286 /* zap it */
2287 bzero(inp, sizeof(*inp));
2288
2289 /* bump generations */
2290 /* setup socket pointers */
2291 inp->sctp_socket = so;
2292 inp->ip_inp.inp.inp_socket = so;
2293 inp->sctp_associd_counter = 1;
2294 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2295 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2296 /* init the small hash table we use to track asocid <-> tcb */
2297 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2298 if (inp->sctp_asocidhash == NULL) {
2299 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2300 SCTP_INP_INFO_WUNLOCK();
2301 return error;
2302 }
2303 #ifdef IPSEC
2304 {
2305 struct inpcbpolicy *pcb_sp = NULL;
2306
2307 error = ipsec_init_policy(so, &pcb_sp);
2308 /* Arrange to share the policy */
2309 inp->ip_inp.inp.inp_sp = pcb_sp;
2310 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2311 }
2312 if (error != 0) {
2313 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2314 SCTP_INP_INFO_WUNLOCK();
2315 return error;
2316 }
2317 #endif /* IPSEC */
2318 SCTP_INCR_EP_COUNT();
2319 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(MOD_INET, ip_defttl);
2320 SCTP_INP_INFO_WUNLOCK();
2321
2322 so->so_pcb = (caddr_t)inp;
2323
2324 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2325 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2326 /* UDP style socket */
2327 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2328 SCTP_PCB_FLAGS_UNBOUND);
2329 /* Be sure it is NON-BLOCKING IO for UDP */
2330 /* SCTP_SET_SO_NBIO(so); */
2331 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2332 /* TCP style socket */
2333 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2334 SCTP_PCB_FLAGS_UNBOUND);
2335 /* Be sure we have blocking IO by default */
2336 SCTP_CLEAR_SO_NBIO(so);
2337 } else {
2338 /*
2339 * unsupported socket type (RAW, etc)- in case we missed it
2340 * in protosw
2341 */
2342 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2343 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2344 return (EOPNOTSUPP);
2345 }
2346 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2347 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2348 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2349 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2350 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2351 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2352 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2353 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2354 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2355 }
2356 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2357 &inp->sctp_hashmark);
2358 if (inp->sctp_tcbhash == NULL) {
2359 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2360 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2361 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2362 return (ENOBUFS);
2363 }
2364 inp->def_vrf_id = vrf_id;
2365
2366 SCTP_INP_INFO_WLOCK();
2367 SCTP_INP_LOCK_INIT(inp);
2368 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2369 SCTP_INP_READ_INIT(inp);
2370 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2371 /* lock the new ep */
2372 SCTP_INP_WLOCK(inp);
2373
2374 /* add it to the info area */
2375 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2376 SCTP_INP_INFO_WUNLOCK();
2377
2378 TAILQ_INIT(&inp->read_queue);
2379 LIST_INIT(&inp->sctp_addr_list);
2380
2381 LIST_INIT(&inp->sctp_asoc_list);
2382
2383 #ifdef SCTP_TRACK_FREED_ASOCS
2384 /* TEMP CODE */
2385 LIST_INIT(&inp->sctp_asoc_free_list);
2386 #endif
2387 /* Init the timer structure for signature change */
2388 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2389 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2390
2391 /* now init the actual endpoint default data */
2392 m = &inp->sctp_ep;
2393
2394 /* setup the base timeout information */
2395 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
2396 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
2397 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2398 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2399 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2400 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2401 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2402 /* all max/min max are in ms */
2403 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2404 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2405 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2406 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2407 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2408
2409 m->max_open_streams_intome = MAX_SCTP_STREAMS;
2410
2411 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2412 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2413 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2414 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2415 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2416 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2417 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2418 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2419 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2420 } else {
2421 /* sysctl done with invalid value, set to 2581 */
2422 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2423 }
2424 /* number of streams to pre-open on a association */
2425 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2426
2427 /* Add adaptation cookie */
2428 m->adaptation_layer_indicator = 0x504C5253;
2429
2430 /* seed random number generator */
2431 m->random_counter = 1;
2432 m->store_at = SCTP_SIGNATURE_SIZE;
2433 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2434 sctp_fill_random_store(m);
2435
2436 /* Minimum cookie size */
2437 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2438 sizeof(struct sctp_state_cookie);
2439 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2440
2441 /* Setup the initial secret */
2442 (void)SCTP_GETTIME_TIMEVAL(&time);
2443 m->time_of_secret_change = time.tv_sec;
2444
2445 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2446 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2447 }
2448 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2449
2450 /* How long is a cookie good for ? */
2451 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2452 /*
2453 * Initialize authentication parameters
2454 */
2455 m->local_hmacs = sctp_default_supported_hmaclist();
2456 m->local_auth_chunks = sctp_alloc_chunklist();
2457 sctp_auth_set_default_chunks(m->local_auth_chunks);
2458 LIST_INIT(&m->shared_keys);
2459 /* add default NULL key as key id 0 */
2460 null_key = sctp_alloc_sharedkey();
2461 sctp_insert_sharedkey(&m->shared_keys, null_key);
2462 SCTP_INP_WUNLOCK(inp);
2463 #ifdef SCTP_LOG_CLOSING
2464 sctp_log_closing(inp, NULL, 12);
2465 #endif
2466 return (error);
2467 }
2468
2469
2470 void
2471 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2472 struct sctp_tcb *stcb)
2473 {
2474 struct sctp_nets *net;
2475 uint16_t lport, rport;
2476 struct sctppcbhead *head;
2477 struct sctp_laddr *laddr, *oladdr;
2478
2479 atomic_add_int(&stcb->asoc.refcnt, 1);
2480 SCTP_TCB_UNLOCK(stcb);
2481 SCTP_INP_INFO_WLOCK();
2482 SCTP_INP_WLOCK(old_inp);
2483 SCTP_INP_WLOCK(new_inp);
2484 SCTP_TCB_LOCK(stcb);
2485 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2486
2487 new_inp->sctp_ep.time_of_secret_change =
2488 old_inp->sctp_ep.time_of_secret_change;
2489 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2490 sizeof(old_inp->sctp_ep.secret_key));
2491 new_inp->sctp_ep.current_secret_number =
2492 old_inp->sctp_ep.current_secret_number;
2493 new_inp->sctp_ep.last_secret_number =
2494 old_inp->sctp_ep.last_secret_number;
2495 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2496
2497 /* make it so new data pours into the new socket */
2498 stcb->sctp_socket = new_inp->sctp_socket;
2499 stcb->sctp_ep = new_inp;
2500
2501 /* Copy the port across */
2502 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2503 rport = stcb->rport;
2504 /* Pull the tcb from the old association */
2505 LIST_REMOVE(stcb, sctp_tcbhash);
2506 LIST_REMOVE(stcb, sctp_tcblist);
2507 if (stcb->asoc.in_asocid_hash) {
2508 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2509 }
2510 /* Now insert the new_inp into the TCP connected hash */
2511 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2512 SCTP_BASE_INFO(hashtcpmark))];
2513
2514 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2515 /* Its safe to access */
2516 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2517
2518 /* Now move the tcb into the endpoint list */
2519 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2520 /*
2521 * Question, do we even need to worry about the ep-hash since we
2522 * only have one connection? Probably not :> so lets get rid of it
2523 * and not suck up any kernel memory in that.
2524 */
2525 if (stcb->asoc.in_asocid_hash) {
2526 struct sctpasochead *lhd;
2527 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2528 new_inp->hashasocidmark)];
2529 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2530 }
2531 /* Ok. Let's restart timer. */
2532 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2533 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2534 stcb, net);
2535 }
2536
2537 SCTP_INP_INFO_WUNLOCK();
2538 if (new_inp->sctp_tcbhash != NULL) {
2539 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2540 new_inp->sctp_tcbhash = NULL;
2541 }
2542 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2543 /* Subset bound, so copy in the laddr list from the old_inp */
2544 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2545 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2546 if (laddr == NULL) {
2547 /*
2548 * Gak, what can we do? This assoc is really
2549 * HOSED. We probably should send an abort
2550 * here.
2551 */
2552 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2553 continue;
2554 }
2555 SCTP_INCR_LADDR_COUNT();
2556 bzero(laddr, sizeof(*laddr));
2557 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2558 laddr->ifa = oladdr->ifa;
2559 atomic_add_int(&laddr->ifa->refcount, 1);
2560 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2561 sctp_nxt_addr);
2562 new_inp->laddr_count++;
2563 }
2564 }
2565 /*
2566 * Now any running timers need to be adjusted since we really don't
2567 * care if they are running or not just blast in the new_inp into
2568 * all of them.
2569 */
2570
2571 stcb->asoc.hb_timer.ep = (void *)new_inp;
2572 stcb->asoc.dack_timer.ep = (void *)new_inp;
2573 stcb->asoc.asconf_timer.ep = (void *)new_inp;
2574 stcb->asoc.strreset_timer.ep = (void *)new_inp;
2575 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2576 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2577 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2578 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2579 /* now what about the nets? */
2580 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2581 net->pmtu_timer.ep = (void *)new_inp;
2582 net->rxt_timer.ep = (void *)new_inp;
2583 net->fr_timer.ep = (void *)new_inp;
2584 }
2585 SCTP_INP_WUNLOCK(new_inp);
2586 SCTP_INP_WUNLOCK(old_inp);
2587 }
2588
2589
2590
2591
2592 /* sctp_ifap is used to bypass normal local address validation checks */
2593 int
2594 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2595 struct sctp_ifa *sctp_ifap, struct thread *p)
2596 {
2597 /* bind a ep to a socket address */
2598 struct sctppcbhead *head;
2599 struct sctp_inpcb *inp, *inp_tmp;
2600 struct inpcb *ip_inp;
2601 int port_reuse_active = 0;
2602 int bindall;
2603 uint16_t lport;
2604 int error;
2605 uint32_t vrf_id;
2606
2607 lport = 0;
2608 error = 0;
2609 bindall = 1;
2610 inp = (struct sctp_inpcb *)so->so_pcb;
2611 ip_inp = (struct inpcb *)so->so_pcb;
2612 #ifdef SCTP_DEBUG
2613 if (addr) {
2614 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2615 ntohs(((struct sockaddr_in *)addr)->sin_port));
2616 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2617 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2618 }
2619 #endif
2620 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2621 /* already did a bind, subsequent binds NOT allowed ! */
2622 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2623 return (EINVAL);
2624 }
2625 #ifdef INVARIANTS
2626 if (p == NULL)
2627 panic("null proc/thread");
2628 #endif
2629 if (addr != NULL) {
2630 switch (addr->sa_family) {
2631 case AF_INET:
2632 {
2633 struct sockaddr_in *sin;
2634
2635 /* IPV6_V6ONLY socket? */
2636 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2637 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2638 return (EINVAL);
2639 }
2640 if (addr->sa_len != sizeof(*sin)) {
2641 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2642 return (EINVAL);
2643 }
2644 sin = (struct sockaddr_in *)addr;
2645 lport = sin->sin_port;
2646 /*
2647 * For LOOPBACK the prison_local_ip4() call
2648 * will transmute the ip address to the
2649 * proper value.
2650 */
2651 if (p && prison_local_ip4(p->td_ucred, &sin->sin_addr) != 0) {
2652 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2653 return (EINVAL);
2654 }
2655 if (sin->sin_addr.s_addr != INADDR_ANY) {
2656 bindall = 0;
2657 }
2658 break;
2659 }
2660 #ifdef INET6
2661 case AF_INET6:
2662 {
2663 /*
2664 * Only for pure IPv6 Address. (No IPv4
2665 * Mapped!)
2666 */
2667 struct sockaddr_in6 *sin6;
2668
2669 sin6 = (struct sockaddr_in6 *)addr;
2670
2671 if (addr->sa_len != sizeof(*sin6)) {
2672 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2673 return (EINVAL);
2674 }
2675 lport = sin6->sin6_port;
2676
2677 /*
2678 * For LOOPBACK the prison_local_ip6() call
2679 * will transmute the ipv6 address to the
2680 * proper value.
2681 */
2682 if (p && prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2683 (SCTP_IPV6_V6ONLY(inp) != 0)) != 0) {
2684 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2685 return (EINVAL);
2686 }
2687 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2688 bindall = 0;
2689 /* KAME hack: embed scopeid */
2690 if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
2691 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2692 return (EINVAL);
2693 }
2694 }
2695 /* this must be cleared for ifa_ifwithaddr() */
2696 sin6->sin6_scope_id = 0;
2697 break;
2698 }
2699 #endif
2700 default:
2701 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2702 return (EAFNOSUPPORT);
2703 }
2704 }
2705 SCTP_INP_INFO_WLOCK();
2706 SCTP_INP_WLOCK(inp);
2707 /* Setup a vrf_id to be the default for the non-bind-all case. */
2708 vrf_id = inp->def_vrf_id;
2709
2710 /* increase our count due to the unlock we do */
2711 SCTP_INP_INCR_REF(inp);
2712 if (lport) {
2713 /*
2714 * Did the caller specify a port? if so we must see if a ep
2715 * already has this one bound.
2716 */
2717 /* got to be root to get at low ports */
2718 if (ntohs(lport) < IPPORT_RESERVED) {
2719 if (p && (error =
2720 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2721 )) {
2722 SCTP_INP_DECR_REF(inp);
2723 SCTP_INP_WUNLOCK(inp);
2724 SCTP_INP_INFO_WUNLOCK();
2725 return (error);
2726 }
2727 }
2728 if (p == NULL) {
2729 SCTP_INP_DECR_REF(inp);
2730 SCTP_INP_WUNLOCK(inp);
2731 SCTP_INP_INFO_WUNLOCK();
2732 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2733 return (error);
2734 }
2735 SCTP_INP_WUNLOCK(inp);
2736 if (bindall) {
2737 vrf_id = inp->def_vrf_id;
2738 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2739 if (inp_tmp != NULL) {
2740 /*
2741 * lock guy returned and lower count note
2742 * that we are not bound so inp_tmp should
2743 * NEVER be inp. And it is this inp
2744 * (inp_tmp) that gets the reference bump,
2745 * so we must lower it.
2746 */
2747 SCTP_INP_DECR_REF(inp_tmp);
2748 /* unlock info */
2749 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2750 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2751 /*
2752 * Ok, must be one-2-one and
2753 * allowing port re-use
2754 */
2755 port_reuse_active = 1;
2756 goto continue_anyway;
2757 }
2758 SCTP_INP_DECR_REF(inp);
2759 SCTP_INP_INFO_WUNLOCK();
2760 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2761 return (EADDRINUSE);
2762 }
2763 } else {
2764 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2765 if (inp_tmp != NULL) {
2766 /*
2767 * lock guy returned and lower count note
2768 * that we are not bound so inp_tmp should
2769 * NEVER be inp. And it is this inp
2770 * (inp_tmp) that gets the reference bump,
2771 * so we must lower it.
2772 */
2773 SCTP_INP_DECR_REF(inp_tmp);
2774 /* unlock info */
2775 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2776 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2777 /*
2778 * Ok, must be one-2-one and
2779 * allowing port re-use
2780 */
2781 port_reuse_active = 1;
2782 goto continue_anyway;
2783 }
2784 SCTP_INP_DECR_REF(inp);
2785 SCTP_INP_INFO_WUNLOCK();
2786 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2787 return (EADDRINUSE);
2788 }
2789 }
2790 continue_anyway:
2791 SCTP_INP_WLOCK(inp);
2792 if (bindall) {
2793 /* verify that no lport is not used by a singleton */
2794 if ((port_reuse_active == 0) &&
2795 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2796 ) {
2797 /* Sorry someone already has this one bound */
2798 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2799 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2800 port_reuse_active = 1;
2801 } else {
2802 SCTP_INP_DECR_REF(inp);
2803 SCTP_INP_WUNLOCK(inp);
2804 SCTP_INP_INFO_WUNLOCK();
2805 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2806 return (EADDRINUSE);
2807 }
2808 }
2809 }
2810 } else {
2811 uint16_t first, last, candidate;
2812 uint16_t count;
2813 int done;
2814
2815 if (ip_inp->inp_flags & INP_HIGHPORT) {
2816 first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto);
2817 last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto);
2818 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2819 if (p && (error =
2820 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2821 )) {
2822 SCTP_INP_DECR_REF(inp);
2823 SCTP_INP_WUNLOCK(inp);
2824 SCTP_INP_INFO_WUNLOCK();
2825 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2826 return (error);
2827 }
2828 first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto);
2829 last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto);
2830 } else {
2831 first = MODULE_GLOBAL(MOD_INET, ipport_firstauto);
2832 last = MODULE_GLOBAL(MOD_INET, ipport_lastauto);
2833 }
2834 if (first > last) {
2835 uint16_t temp;
2836
2837 temp = first;
2838 first = last;
2839 last = temp;
2840 }
2841 count = last - first + 1; /* number of candidates */
2842 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2843
2844 done = 0;
2845 while (!done) {
2846 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2847 done = 1;
2848 }
2849 if (!done) {
2850 if (--count == 0) {
2851 SCTP_INP_DECR_REF(inp);
2852 SCTP_INP_WUNLOCK(inp);
2853 SCTP_INP_INFO_WUNLOCK();
2854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2855 return (EADDRINUSE);
2856 }
2857 if (candidate == last)
2858 candidate = first;
2859 else
2860 candidate = candidate + 1;
2861 }
2862 }
2863 lport = htons(candidate);
2864 }
2865 SCTP_INP_DECR_REF(inp);
2866 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2867 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2868 /*
2869 * this really should not happen. The guy did a non-blocking
2870 * bind and then did a close at the same time.
2871 */
2872 SCTP_INP_WUNLOCK(inp);
2873 SCTP_INP_INFO_WUNLOCK();
2874 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2875 return (EINVAL);
2876 }
2877 /* ok we look clear to give out this port, so lets setup the binding */
2878 if (bindall) {
2879 /* binding to all addresses, so just set in the proper flags */
2880 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2881 /* set the automatic addr changes from kernel flag */
2882 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2883 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2884 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2885 } else {
2886 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2887 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2888 }
2889 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2890 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2891 } else {
2892 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2893 }
2894 /*
2895 * set the automatic mobility_base from kernel flag (by
2896 * micchie)
2897 */
2898 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2899 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2900 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2901 } else {
2902 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2903 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2904 }
2905 /*
2906 * set the automatic mobility_fasthandoff from kernel flag
2907 * (by micchie)
2908 */
2909 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2910 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2911 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2912 } else {
2913 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2914 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2915 }
2916 } else {
2917 /*
2918 * bind specific, make sure flags is off and add a new
2919 * address structure to the sctp_addr_list inside the ep
2920 * structure.
2921 *
2922 * We will need to allocate one and insert it at the head. The
2923 * socketopt call can just insert new addresses in there as
2924 * well. It will also have to do the embed scope kame hack
2925 * too (before adding).
2926 */
2927 struct sctp_ifa *ifa;
2928 struct sockaddr_storage store_sa;
2929
2930 memset(&store_sa, 0, sizeof(store_sa));
2931 if (addr->sa_family == AF_INET) {
2932 struct sockaddr_in *sin;
2933
2934 sin = (struct sockaddr_in *)&store_sa;
2935 memcpy(sin, addr, sizeof(struct sockaddr_in));
2936 sin->sin_port = 0;
2937 } else if (addr->sa_family == AF_INET6) {
2938 struct sockaddr_in6 *sin6;
2939
2940 sin6 = (struct sockaddr_in6 *)&store_sa;
2941 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2942 sin6->sin6_port = 0;
2943 }
2944 /*
2945 * first find the interface with the bound address need to
2946 * zero out the port to find the address! yuck! can't do
2947 * this earlier since need port for sctp_pcb_findep()
2948 */
2949 if (sctp_ifap != NULL)
2950 ifa = sctp_ifap;
2951 else {
2952 /*
2953 * Note for BSD we hit here always other O/S's will
2954 * pass things in via the sctp_ifap argument
2955 * (Panda).
2956 */
2957 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2958 vrf_id, SCTP_ADDR_NOT_LOCKED);
2959 }
2960 if (ifa == NULL) {
2961 /* Can't find an interface with that address */
2962 SCTP_INP_WUNLOCK(inp);
2963 SCTP_INP_INFO_WUNLOCK();
2964 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2965 return (EADDRNOTAVAIL);
2966 }
2967 if (addr->sa_family == AF_INET6) {
2968 /* GAK, more FIXME IFA lock? */
2969 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2970 /* Can't bind a non-existent addr. */
2971 SCTP_INP_WUNLOCK(inp);
2972 SCTP_INP_INFO_WUNLOCK();
2973 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2974 return (EINVAL);
2975 }
2976 }
2977 /* we're not bound all */
2978 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2979 /* allow bindx() to send ASCONF's for binding changes */
2980 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2981 /* clear automatic addr changes from kernel flag */
2982 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2983
2984 /* add this address to the endpoint list */
2985 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2986 if (error != 0) {
2987 SCTP_INP_WUNLOCK(inp);
2988 SCTP_INP_INFO_WUNLOCK();
2989 return (error);
2990 }
2991 inp->laddr_count++;
2992 }
2993 /* find the bucket */
2994 if (port_reuse_active) {
2995 /* Put it into tcp 1-2-1 hash */
2996 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2997 SCTP_BASE_INFO(hashtcpmark))];
2998 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
2999 } else {
3000 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
3001 SCTP_BASE_INFO(hashmark))];
3002 }
3003 /* put it in the bucket */
3004 LIST_INSERT_HEAD(head, inp, sctp_hash);
3005 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3006 head, ntohs(lport), port_reuse_active);
3007 /* set in the port */
3008 inp->sctp_lport = lport;
3009
3010 /* turn off just the unbound flag */
3011 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3012 SCTP_INP_WUNLOCK(inp);
3013 SCTP_INP_INFO_WUNLOCK();
3014 return (0);
3015 }
3016
3017
3018 static void
3019 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
3020 {
3021 struct sctp_iterator *it;
3022
3023 /*
3024 * We enter with the only the ITERATOR_LOCK in place and a write
3025 * lock on the inp_info stuff.
3026 */
3027
3028 /*
3029 * Go through all iterators, we must do this since it is possible
3030 * that some iterator does NOT have the lock, but is waiting for it.
3031 * And the one that had the lock has either moved in the last
3032 * iteration or we just cleared it above. We need to find all of
3033 * those guys. The list of iterators should never be very big
3034 * though.
3035 */
3036 TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) {
3037 if (it == inp->inp_starting_point_for_iterator)
3038 /* skip this guy, he's special */
3039 continue;
3040 if (it->inp == inp) {
3041 /*
3042 * This is tricky and we DON'T lock the iterator.
3043 * Reason is he's running but waiting for me since
3044 * inp->inp_starting_point_for_iterator has the lock
3045 * on me (the guy above we skipped). This tells us
3046 * its is not running but waiting for
3047 * inp->inp_starting_point_for_iterator to be
3048 * released by the guy that does have our INP in a
3049 * lock.
3050 */
3051 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3052 it->inp = NULL;
3053 it->stcb = NULL;
3054 } else {
3055 /* set him up to do the next guy not me */
3056 it->inp = inp_next;
3057 it->stcb = NULL;
3058 }
3059 }
3060 }
3061 it = inp->inp_starting_point_for_iterator;
3062 if (it) {
3063 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3064 it->inp = NULL;
3065 } else {
3066 it->inp = inp_next;
3067 }
3068 it->stcb = NULL;
3069 }
3070 }
3071
3072 /* release sctp_inpcb unbind the port */
3073 void
3074 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3075 {
3076 /*
3077 * Here we free a endpoint. We must find it (if it is in the Hash
3078 * table) and remove it from there. Then we must also find it in the
3079 * overall list and remove it from there. After all removals are
3080 * complete then any timer has to be stopped. Then start the actual
3081 * freeing. a) Any local lists. b) Any associations. c) The hash of
3082 * all associations. d) finally the ep itself.
3083 */
3084 struct sctp_pcb *m;
3085 struct sctp_inpcb *inp_save;
3086 struct sctp_tcb *asoc, *nasoc;
3087 struct sctp_laddr *laddr, *nladdr;
3088 struct inpcb *ip_pcb;
3089 struct socket *so;
3090
3091 struct sctp_queued_to_read *sq;
3092
3093
3094 int cnt;
3095 sctp_sharedkey_t *shared_key;
3096
3097
3098 #ifdef SCTP_LOG_CLOSING
3099 sctp_log_closing(inp, NULL, 0);
3100 #endif
3101 SCTP_ITERATOR_LOCK();
3102 so = inp->sctp_socket;
3103 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3104 /* been here before.. eeks.. get out of here */
3105 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3106 SCTP_ITERATOR_UNLOCK();
3107 #ifdef SCTP_LOG_CLOSING
3108 sctp_log_closing(inp, NULL, 1);
3109 #endif
3110 return;
3111 }
3112 SCTP_ASOC_CREATE_LOCK(inp);
3113 SCTP_INP_INFO_WLOCK();
3114
3115 SCTP_INP_WLOCK(inp);
3116 /* First time through we have the socket lock, after that no more. */
3117 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3118 /*
3119 * Once we are in we can remove the flag from = 1 is only
3120 * passed from the actual closing routines that are called
3121 * via the sockets layer.
3122 */
3123 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3124 /* socket is gone, so no more wakeups allowed */
3125 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3126 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3127 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3128 }
3129 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3130 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3131
3132 if (inp->control) {
3133 sctp_m_freem(inp->control);
3134 inp->control = NULL;
3135 }
3136 if (inp->pkt) {
3137 sctp_m_freem(inp->pkt);
3138 inp->pkt = NULL;
3139 }
3140 m = &inp->sctp_ep;
3141 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3142 * here but I will be nice :> (i.e.
3143 * ip_pcb = ep;) */
3144 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3145 int cnt_in_sd;
3146
3147 cnt_in_sd = 0;
3148 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3149 asoc = nasoc) {
3150 SCTP_TCB_LOCK(asoc);
3151 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3152 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3153 /* Skip guys being freed */
3154 /* asoc->sctp_socket = NULL; FIXME MT */
3155 cnt_in_sd++;
3156 SCTP_TCB_UNLOCK(asoc);
3157 continue;
3158 }
3159 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3160 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
3161 /*
3162 * If we have data in queue, we don't want
3163 * to just free since the app may have done,
3164 * send()/close or connect/send/close. And
3165 * it wants the data to get across first.
3166 */
3167 /* Just abandon things in the front states */
3168 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3169 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3170 cnt_in_sd++;
3171 }
3172 continue;
3173 }
3174 /* Disconnect the socket please */
3175 asoc->sctp_socket = NULL;
3176 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3177 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3178 (asoc->asoc.control_pdapi) ||
3179 (asoc->asoc.size_on_all_streams > 0) ||
3180 (so && (so->so_rcv.sb_cc > 0))
3181 ) {
3182 /* Left with Data unread */
3183 struct mbuf *op_err;
3184
3185 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3186 0, M_DONTWAIT, 1, MT_DATA);
3187 if (op_err) {
3188 /* Fill in the user initiated abort */
3189 struct sctp_paramhdr *ph;
3190 uint32_t *ippp;
3191
3192 SCTP_BUF_LEN(op_err) =
3193 sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3194 ph = mtod(op_err,
3195 struct sctp_paramhdr *);
3196 ph->param_type = htons(
3197 SCTP_CAUSE_USER_INITIATED_ABT);
3198 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3199 ippp = (uint32_t *) (ph + 1);
3200 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3201 }
3202 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3203 #if defined(SCTP_PANIC_ON_ABORT)
3204 panic("inpcb_free does an abort");
3205 #endif
3206 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3207 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3208 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3209 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3210 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3211 }
3212 if (sctp_free_assoc(inp, asoc,
3213 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3214 cnt_in_sd++;
3215 }
3216 continue;
3217 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3218 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3219 (asoc->asoc.stream_queue_cnt == 0)
3220 ) {
3221 if (asoc->asoc.locked_on_sending) {
3222 goto abort_anyway;
3223 }
3224 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3225 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3226 /*
3227 * there is nothing queued to send,
3228 * so I send shutdown
3229 */
3230 sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3231 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3232 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3233 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3234 }
3235 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3236 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3237 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3238 asoc->asoc.primary_destination);
3239 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3240 asoc->asoc.primary_destination);
3241 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3242 }
3243 } else {
3244 /* mark into shutdown pending */
3245 struct sctp_stream_queue_pending *sp;
3246
3247 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3248 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3249 asoc->asoc.primary_destination);
3250 if (asoc->asoc.locked_on_sending) {
3251 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3252 sctp_streamhead);
3253 if (sp == NULL) {
3254 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3255 asoc->asoc.locked_on_sending,
3256 asoc->asoc.locked_on_sending->stream_no);
3257 } else {
3258 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3259 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3260 }
3261 }
3262 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3263 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3264 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3265 struct mbuf *op_err;
3266
3267 abort_anyway:
3268 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3269 0, M_DONTWAIT, 1, MT_DATA);
3270 if (op_err) {
3271 /*
3272 * Fill in the user
3273 * initiated abort
3274 */
3275 struct sctp_paramhdr *ph;
3276 uint32_t *ippp;
3277
3278 SCTP_BUF_LEN(op_err) =
3279 (sizeof(struct sctp_paramhdr) +
3280 sizeof(uint32_t));
3281 ph = mtod(op_err,
3282 struct sctp_paramhdr *);
3283 ph->param_type = htons(
3284 SCTP_CAUSE_USER_INITIATED_ABT);
3285 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3286 ippp = (uint32_t *) (ph + 1);
3287 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3288 }
3289 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3290 #if defined(SCTP_PANIC_ON_ABORT)
3291 panic("inpcb_free does an abort");
3292 #endif
3293
3294 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3295 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3296 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3297 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3298 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3299 }
3300 if (sctp_free_assoc(inp, asoc,
3301 SCTP_PCBFREE_NOFORCE,
3302 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3303 cnt_in_sd++;
3304 }
3305 continue;
3306 } else {
3307 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3308 }
3309 }
3310 cnt_in_sd++;
3311 SCTP_TCB_UNLOCK(asoc);
3312 }
3313 /* now is there some left in our SHUTDOWN state? */
3314 if (cnt_in_sd) {
3315 SCTP_INP_WUNLOCK(inp);
3316 SCTP_ASOC_CREATE_UNLOCK(inp);
3317 SCTP_INP_INFO_WUNLOCK();
3318 SCTP_ITERATOR_UNLOCK();
3319 #ifdef SCTP_LOG_CLOSING
3320 sctp_log_closing(inp, NULL, 2);
3321 #endif
3322 inp->sctp_socket = NULL;
3323 return;
3324 }
3325 }
3326 inp->sctp_socket = NULL;
3327 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3328 SCTP_PCB_FLAGS_UNBOUND) {
3329 /*
3330 * ok, this guy has been bound. It's port is somewhere in
3331 * the SCTP_BASE_INFO(hash table). Remove it!
3332 */
3333 LIST_REMOVE(inp, sctp_hash);
3334 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3335 }
3336 /*
3337 * If there is a timer running to kill us, forget it, since it may
3338 * have a contest on the INP lock.. which would cause us to die ...
3339 */
3340 cnt = 0;
3341 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3342 asoc = nasoc) {
3343 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3344 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3345 cnt++;
3346 continue;
3347 }
3348 /* Free associations that are NOT killing us */
3349 SCTP_TCB_LOCK(asoc);
3350 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3351 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3352 struct mbuf *op_err;
3353 uint32_t *ippp;
3354
3355 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3356 0, M_DONTWAIT, 1, MT_DATA);
3357 if (op_err) {
3358 /* Fill in the user initiated abort */
3359 struct sctp_paramhdr *ph;
3360
3361 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3362 sizeof(uint32_t));
3363 ph = mtod(op_err, struct sctp_paramhdr *);
3364 ph->param_type = htons(
3365 SCTP_CAUSE_USER_INITIATED_ABT);
3366 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3367 ippp = (uint32_t *) (ph + 1);
3368 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3369
3370 }
3371 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3372 #if defined(SCTP_PANIC_ON_ABORT)
3373 panic("inpcb_free does an abort");
3374 #endif
3375 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3376 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3377 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3378 cnt++;
3379 SCTP_TCB_UNLOCK(asoc);
3380 continue;
3381 }
3382 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3383 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3384 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3385 }
3386 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3387 cnt++;
3388 }
3389 }
3390 if (cnt) {
3391 /* Ok we have someone out there that will kill us */
3392 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3393 SCTP_INP_WUNLOCK(inp);
3394 SCTP_ASOC_CREATE_UNLOCK(inp);
3395 SCTP_INP_INFO_WUNLOCK();
3396 SCTP_ITERATOR_UNLOCK();
3397 #ifdef SCTP_LOG_CLOSING
3398 sctp_log_closing(inp, NULL, 3);
3399 #endif
3400 return;
3401 }
3402 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3403 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3404 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3405 SCTP_INP_WUNLOCK(inp);
3406 SCTP_ASOC_CREATE_UNLOCK(inp);
3407 SCTP_INP_INFO_WUNLOCK();
3408 SCTP_ITERATOR_UNLOCK();
3409 #ifdef SCTP_LOG_CLOSING
3410 sctp_log_closing(inp, NULL, 4);
3411 #endif
3412 return;
3413 }
3414 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3415 inp->sctp_ep.signature_change.type = 0;
3416 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3417
3418 #ifdef SCTP_LOG_CLOSING
3419 sctp_log_closing(inp, NULL, 5);
3420 #endif
3421
3422 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3423 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3424 /* Clear the read queue */
3425 if ((inp->sctp_asocidhash) != NULL) {
3426 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3427 inp->sctp_asocidhash = NULL;
3428 }
3429 /* sa_ignore FREED_MEMORY */
3430 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3431 /* Its only abandoned if it had data left */
3432 if (sq->length)
3433 SCTP_STAT_INCR(sctps_left_abandon);
3434
3435 TAILQ_REMOVE(&inp->read_queue, sq, next);
3436 sctp_free_remote_addr(sq->whoFrom);
3437 if (so)
3438 so->so_rcv.sb_cc -= sq->length;
3439 if (sq->data) {
3440 sctp_m_freem(sq->data);
3441 sq->data = NULL;
3442 }
3443 /*
3444 * no need to free the net count, since at this point all
3445 * assoc's are gone.
3446 */
3447 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3448 SCTP_DECR_READQ_COUNT();
3449 }
3450 /* Now the sctp_pcb things */
3451 /*
3452 * free each asoc if it is not already closed/free. we can't use the
3453 * macro here since le_next will get freed as part of the
3454 * sctp_free_assoc() call.
3455 */
3456 cnt = 0;
3457 if (so) {
3458 #ifdef IPSEC
3459 ipsec_delete_pcbpolicy(ip_pcb);
3460 #endif /* IPSEC */
3461
3462 /* Unlocks not needed since the socket is gone now */
3463 }
3464 if (ip_pcb->inp_options) {
3465 (void)sctp_m_free(ip_pcb->inp_options);
3466 ip_pcb->inp_options = 0;
3467 }
3468 if (ip_pcb->inp_moptions) {
3469 inp_freemoptions(ip_pcb->inp_moptions);
3470 ip_pcb->inp_moptions = 0;
3471 }
3472 #ifdef INET6
3473 if (ip_pcb->inp_vflag & INP_IPV6) {
3474 struct in6pcb *in6p;
3475
3476 in6p = (struct in6pcb *)inp;
3477 ip6_freepcbopts(in6p->in6p_outputopts);
3478 }
3479 #endif /* INET6 */
3480 ip_pcb->inp_vflag = 0;
3481 /* free up authentication fields */
3482 if (inp->sctp_ep.local_auth_chunks != NULL)
3483 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3484 if (inp->sctp_ep.local_hmacs != NULL)
3485 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3486
3487 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3488 while (shared_key) {
3489 LIST_REMOVE(shared_key, next);
3490 sctp_free_sharedkey(shared_key);
3491 /* sa_ignore FREED_MEMORY */
3492 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3493 }
3494
3495 inp_save = LIST_NEXT(inp, sctp_list);
3496 LIST_REMOVE(inp, sctp_list);
3497
3498 /* fix any iterators only after out of the list */
3499 sctp_iterator_inp_being_freed(inp, inp_save);
3500 /*
3501 * if we have an address list the following will free the list of
3502 * ifaddr's that are set into this ep. Again macro limitations here,
3503 * since the LIST_FOREACH could be a bad idea.
3504 */
3505 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3506 laddr = nladdr) {
3507 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3508 sctp_remove_laddr(laddr);
3509 }
3510
3511 #ifdef SCTP_TRACK_FREED_ASOCS
3512 /* TEMP CODE */
3513 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3514 asoc = nasoc) {
3515 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3516 LIST_REMOVE(asoc, sctp_tcblist);
3517 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3518 SCTP_DECR_ASOC_COUNT();
3519 }
3520 /* *** END TEMP CODE *** */
3521 #endif
3522 /* Now lets see about freeing the EP hash table. */
3523 if (inp->sctp_tcbhash != NULL) {
3524 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3525 inp->sctp_tcbhash = NULL;
3526 }
3527 /* Now we must put the ep memory back into the zone pool */
3528 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3529 SCTP_INP_LOCK_DESTROY(inp);
3530 SCTP_INP_READ_DESTROY(inp);
3531 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3532 SCTP_INP_INFO_WUNLOCK();
3533 SCTP_ITERATOR_UNLOCK();
3534 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3535 SCTP_DECR_EP_COUNT();
3536 }
3537
3538
3539 struct sctp_nets *
3540 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3541 {
3542 struct sctp_nets *net;
3543
3544 /* locate the address */
3545 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3546 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3547 return (net);
3548 }
3549 return (NULL);
3550 }
3551
3552
3553 int
3554 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3555 {
3556 struct sctp_ifa *sctp_ifa;
3557
3558 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3559 if (sctp_ifa) {
3560 return (1);
3561 } else {
3562 return (0);
3563 }
3564 }
3565
3566 /*
3567 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3568 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3569 * stats of stuff.
3570 */
3571 int
3572 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3573 int set_scope, int from)
3574 {
3575 /*
3576 * The following is redundant to the same lines in the
3577 * sctp_aloc_assoc() but is needed since other's call the add
3578 * address function
3579 */
3580 struct sctp_nets *net, *netfirst;
3581 int addr_inscope;
3582
3583 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3584 from);
3585 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3586
3587 netfirst = sctp_findnet(stcb, newaddr);
3588 if (netfirst) {
3589 /*
3590 * Lie and return ok, we don't want to make the association
3591 * go away for this behavior. It will happen in the TCP
3592 * model in a connected socket. It does not reach the hash
3593 * table until after the association is built so it can't be
3594 * found. Mark as reachable, since the initial creation will
3595 * have been cleared and the NOT_IN_ASSOC flag will have
3596 * been added... and we don't want to end up removing it
3597 * back out.
3598 */
3599 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3600 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3601 SCTP_ADDR_UNCONFIRMED);
3602 } else {
3603 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3604 }
3605
3606 return (0);
3607 }
3608 addr_inscope = 1;
3609 if (newaddr->sa_family == AF_INET) {
3610 struct sockaddr_in *sin;
3611
3612 sin = (struct sockaddr_in *)newaddr;
3613 if (sin->sin_addr.s_addr == 0) {
3614 /* Invalid address */
3615 return (-1);
3616 }
3617 /* zero out the bzero area */
3618 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3619
3620 /* assure len is set */
3621 sin->sin_len = sizeof(struct sockaddr_in);
3622 if (set_scope) {
3623 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3624 stcb->ipv4_local_scope = 1;
3625 #else
3626 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3627 stcb->asoc.ipv4_local_scope = 1;
3628 }
3629 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3630 } else {
3631 /* Validate the address is in scope */
3632 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3633 (stcb->asoc.ipv4_local_scope == 0)) {
3634 addr_inscope = 0;
3635 }
3636 }
3637 #ifdef INET6
3638 } else if (newaddr->sa_family == AF_INET6) {
3639 struct sockaddr_in6 *sin6;
3640
3641 sin6 = (struct sockaddr_in6 *)newaddr;
3642 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3643 /* Invalid address */
3644 return (-1);
3645 }
3646 /* assure len is set */
3647 sin6->sin6_len = sizeof(struct sockaddr_in6);
3648 if (set_scope) {
3649 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3650 stcb->asoc.loopback_scope = 1;
3651 stcb->asoc.local_scope = 0;
3652 stcb->asoc.ipv4_local_scope = 1;
3653 stcb->asoc.site_scope = 1;
3654 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3655 /*
3656 * If the new destination is a LINK_LOCAL we
3657 * must have common site scope. Don't set
3658 * the local scope since we may not share
3659 * all links, only loopback can do this.
3660 * Links on the local network would also be
3661 * on our private network for v4 too.
3662 */
3663 stcb->asoc.ipv4_local_scope = 1;
3664 stcb->asoc.site_scope = 1;
3665 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3666 /*
3667 * If the new destination is SITE_LOCAL then
3668 * we must have site scope in common.
3669 */
3670 stcb->asoc.site_scope = 1;
3671 }
3672 } else {
3673 /* Validate the address is in scope */
3674 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3675 (stcb->asoc.loopback_scope == 0)) {
3676 addr_inscope = 0;
3677 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3678 (stcb->asoc.local_scope == 0)) {
3679 addr_inscope = 0;
3680 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3681 (stcb->asoc.site_scope == 0)) {
3682 addr_inscope = 0;
3683 }
3684 }
3685 #endif
3686 } else {
3687 /* not supported family type */
3688 return (-1);
3689 }
3690 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3691 if (net == NULL) {
3692 return (-1);
3693 }
3694 SCTP_INCR_RADDR_COUNT();
3695 bzero(net, sizeof(*net));
3696 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3697 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3698 if (newaddr->sa_family == AF_INET) {
3699 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3700 } else if (newaddr->sa_family == AF_INET6) {
3701 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3702 }
3703 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3704 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3705 stcb->asoc.loopback_scope = 1;
3706 stcb->asoc.ipv4_local_scope = 1;
3707 stcb->asoc.local_scope = 0;
3708 stcb->asoc.site_scope = 1;
3709 addr_inscope = 1;
3710 }
3711 net->failure_threshold = stcb->asoc.def_net_failure;
3712 if (addr_inscope == 0) {
3713 net->dest_state = (SCTP_ADDR_REACHABLE |
3714 SCTP_ADDR_OUT_OF_SCOPE);
3715 } else {
3716 if (from == SCTP_ADDR_IS_CONFIRMED)
3717 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3718 net->dest_state = SCTP_ADDR_REACHABLE;
3719 else
3720 net->dest_state = SCTP_ADDR_REACHABLE |
3721 SCTP_ADDR_UNCONFIRMED;
3722 }
3723 /*
3724 * We set this to 0, the timer code knows that this means its an
3725 * initial value
3726 */
3727 net->RTO = 0;
3728 net->RTO_measured = 0;
3729 stcb->asoc.numnets++;
3730 *(&net->ref_count) = 1;
3731 net->tos_flowlabel = 0;
3732 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3733 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3734 } else {
3735 net->port = 0;
3736 }
3737 #ifdef INET
3738 if (newaddr->sa_family == AF_INET)
3739 net->tos_flowlabel = stcb->asoc.default_tos;
3740 #endif
3741 #ifdef INET6
3742 if (newaddr->sa_family == AF_INET6)
3743 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3744 #endif
3745 /* Init the timer structure */
3746 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3747 SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3748 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3749
3750 /* Now generate a route for this guy */
3751 #ifdef INET6
3752 /* KAME hack: embed scopeid */
3753 if (newaddr->sa_family == AF_INET6) {
3754 struct sockaddr_in6 *sin6;
3755
3756 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3757 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
3758 sin6->sin6_scope_id = 0;
3759 }
3760 #endif
3761 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3762
3763 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3764 /* Get source address */
3765 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3766 stcb,
3767 (sctp_route_t *) & net->ro,
3768 net,
3769 0,
3770 stcb->asoc.vrf_id);
3771 /* Now get the interface MTU */
3772 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3773 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3774 } else {
3775 net->mtu = 0;
3776 }
3777 #ifdef SCTP_PRINT_FOR_B_AND_M
3778 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3779 #endif
3780 if (net->mtu == 0) {
3781 /* Huh ?? */
3782 net->mtu = SCTP_DEFAULT_MTU;
3783 } else {
3784 uint32_t rmtu;
3785
3786 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3787 #ifdef SCTP_PRINT_FOR_B_AND_M
3788 SCTP_PRINTF("The route mtu is %d\n", rmtu);
3789 #endif
3790 if (rmtu == 0) {
3791 /*
3792 * Start things off to match mtu of
3793 * interface please.
3794 */
3795 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3796 net->ro.ro_rt, net->mtu);
3797 } else {
3798 /*
3799 * we take the route mtu over the interface,
3800 * since the route may be leading out the
3801 * loopback, or a different interface.
3802 */
3803 net->mtu = rmtu;
3804 }
3805 }
3806 if (from == SCTP_ALLOC_ASOC) {
3807 #ifdef SCTP_PRINT_FOR_B_AND_M
3808 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3809 #endif
3810 stcb->asoc.smallest_mtu = net->mtu;
3811 }
3812 } else {
3813 net->mtu = stcb->asoc.smallest_mtu;
3814 }
3815 #ifdef INET6
3816 if (newaddr->sa_family == AF_INET6) {
3817 struct sockaddr_in6 *sin6;
3818
3819 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3820 (void)sa6_recoverscope(sin6);
3821 }
3822 #endif
3823 if (net->port) {
3824 net->mtu -= sizeof(struct udphdr);
3825 }
3826 if (stcb->asoc.smallest_mtu > net->mtu) {
3827 #ifdef SCTP_PRINT_FOR_B_AND_M
3828 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3829 net->mtu, stcb->asoc.smallest_mtu);
3830 #endif
3831 stcb->asoc.smallest_mtu = net->mtu;
3832 }
3833 /* JRS - Use the congestion control given in the CC module */
3834 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3835
3836 /*
3837 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3838 * of assoc (2005/06/27, iyengar@cis.udel.edu)
3839 */
3840 net->find_pseudo_cumack = 1;
3841 net->find_rtx_pseudo_cumack = 1;
3842 net->src_addr_selected = 0;
3843 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3844 if (net->ro.ro_rt == NULL) {
3845 /* Since we have no route put it at the back */
3846 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3847 } else if (netfirst == NULL) {
3848 /* We are the first one in the pool. */
3849 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3850 } else if (netfirst->ro.ro_rt == NULL) {
3851 /*
3852 * First one has NO route. Place this one ahead of the first
3853 * one.
3854 */
3855 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3856 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3857 /*
3858 * This one has a different interface than the one at the
3859 * top of the list. Place it ahead.
3860 */
3861 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3862 } else {
3863 /*
3864 * Ok we have the same interface as the first one. Move
3865 * forward until we find either a) one with a NULL route...
3866 * insert ahead of that b) one with a different ifp.. insert
3867 * after that. c) end of the list.. insert at the tail.
3868 */
3869 struct sctp_nets *netlook;
3870
3871 do {
3872 netlook = TAILQ_NEXT(netfirst, sctp_next);
3873 if (netlook == NULL) {
3874 /* End of the list */
3875 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3876 break;
3877 } else if (netlook->ro.ro_rt == NULL) {
3878 /* next one has NO route */
3879 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3880 break;
3881 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3882 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3883 net, sctp_next);
3884 break;
3885 }
3886 /* Shift forward */
3887 netfirst = netlook;
3888 } while (netlook != NULL);
3889 }
3890
3891 /* got to have a primary set */
3892 if (stcb->asoc.primary_destination == 0) {
3893 stcb->asoc.primary_destination = net;
3894 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3895 (net->ro.ro_rt) &&
3896 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3897 /* No route to current primary adopt new primary */
3898 stcb->asoc.primary_destination = net;
3899 }
3900 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3901 net);
3902 /* Validate primary is first */
3903 net = TAILQ_FIRST(&stcb->asoc.nets);
3904 if ((net != stcb->asoc.primary_destination) &&
3905 (stcb->asoc.primary_destination)) {
3906 /*
3907 * first one on the list is NOT the primary sctp_cmpaddr()
3908 * is much more efficent if the primary is the first on the
3909 * list, make it so.
3910 */
3911 TAILQ_REMOVE(&stcb->asoc.nets,
3912 stcb->asoc.primary_destination, sctp_next);
3913 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3914 stcb->asoc.primary_destination, sctp_next);
3915 }
3916 return (0);
3917 }
3918
3919
3920 static uint32_t
3921 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3922 {
3923 uint32_t id;
3924 struct sctpasochead *head;
3925 struct sctp_tcb *lstcb;
3926
3927 try_again:
3928 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3929 /* TSNH */
3930 return (0);
3931 }
3932 SCTP_INP_WLOCK(inp);
3933 id = inp->sctp_associd_counter;
3934 inp->sctp_associd_counter++;
3935 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
3936 if (lstcb) {
3937 goto try_again;
3938 }
3939 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
3940 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
3941 stcb->asoc.in_asocid_hash = 1;
3942 SCTP_INP_WUNLOCK(inp);
3943 return id;
3944 }
3945
3946 /*
3947 * allocate an association and add it to the endpoint. The caller must be
3948 * careful to add all additional addresses once they are know right away or
3949 * else the assoc will be may experience a blackout scenario.
3950 */
3951 struct sctp_tcb *
3952 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3953 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3954 struct thread *p
3955 )
3956 {
3957 /* note the p argument is only valid in unbound sockets */
3958
3959 struct sctp_tcb *stcb;
3960 struct sctp_association *asoc;
3961 struct sctpasochead *head;
3962 uint16_t rport;
3963 int err;
3964
3965 /*
3966 * Assumption made here: Caller has done a
3967 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3968 * address does not exist already.
3969 */
3970 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
3971 /* Hit max assoc, sorry no more */
3972 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3973 *error = ENOBUFS;
3974 return (NULL);
3975 }
3976 if (firstaddr == NULL) {
3977 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3978 *error = EINVAL;
3979 return (NULL);
3980 }
3981 SCTP_INP_RLOCK(inp);
3982 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
3983 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
3984 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
3985 /*
3986 * If its in the TCP pool, its NOT allowed to create an
3987 * association. The parent listener needs to call
3988 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3989 * off, or connected one does this.. its an error.
3990 */
3991 SCTP_INP_RUNLOCK(inp);
3992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3993 *error = EINVAL;
3994 return (NULL);
3995 }
3996 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3997 #ifdef SCTP_DEBUG
3998 if (firstaddr) {
3999 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4000 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4001 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4002 } else {
4003 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4004 }
4005 #endif /* SCTP_DEBUG */
4006 if (firstaddr->sa_family == AF_INET) {
4007 struct sockaddr_in *sin;
4008
4009 sin = (struct sockaddr_in *)firstaddr;
4010 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4011 /* Invalid address */
4012 SCTP_INP_RUNLOCK(inp);
4013 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4014 *error = EINVAL;
4015 return (NULL);
4016 }
4017 rport = sin->sin_port;
4018 } else if (firstaddr->sa_family == AF_INET6) {
4019 struct sockaddr_in6 *sin6;
4020
4021 sin6 = (struct sockaddr_in6 *)firstaddr;
4022 if ((sin6->sin6_port == 0) ||
4023 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4024 /* Invalid address */
4025 SCTP_INP_RUNLOCK(inp);
4026 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4027 *error = EINVAL;
4028 return (NULL);
4029 }
4030 rport = sin6->sin6_port;
4031 } else {
4032 /* not supported family type */
4033 SCTP_INP_RUNLOCK(inp);
4034 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4035 *error = EINVAL;
4036 return (NULL);
4037 }
4038 SCTP_INP_RUNLOCK(inp);
4039 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4040 /*
4041 * If you have not performed a bind, then we need to do the
4042 * ephemerial bind for you.
4043 */
4044 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4045 (struct sockaddr *)NULL,
4046 (struct sctp_ifa *)NULL,
4047 p
4048 ))) {
4049 /* bind error, probably perm */
4050 *error = err;
4051 return (NULL);
4052 }
4053 }
4054 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4055 if (stcb == NULL) {
4056 /* out of memory? */
4057 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4058 *error = ENOMEM;
4059 return (NULL);
4060 }
4061 SCTP_INCR_ASOC_COUNT();
4062
4063 bzero(stcb, sizeof(*stcb));
4064 asoc = &stcb->asoc;
4065
4066 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4067 SCTP_TCB_LOCK_INIT(stcb);
4068 SCTP_TCB_SEND_LOCK_INIT(stcb);
4069 stcb->rport = rport;
4070 /* setup back pointer's */
4071 stcb->sctp_ep = inp;
4072 stcb->sctp_socket = inp->sctp_socket;
4073 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
4074 /* failed */
4075 SCTP_TCB_LOCK_DESTROY(stcb);
4076 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4077 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4078 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4079 SCTP_DECR_ASOC_COUNT();
4080 *error = err;
4081 return (NULL);
4082 }
4083 /* and the port */
4084 SCTP_INP_INFO_WLOCK();
4085 SCTP_INP_WLOCK(inp);
4086 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4087 /* inpcb freed while alloc going on */
4088 SCTP_TCB_LOCK_DESTROY(stcb);
4089 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4090 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4091 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4092 SCTP_INP_WUNLOCK(inp);
4093 SCTP_INP_INFO_WUNLOCK();
4094 SCTP_DECR_ASOC_COUNT();
4095 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4096 *error = EINVAL;
4097 return (NULL);
4098 }
4099 SCTP_TCB_LOCK(stcb);
4100
4101 /* now that my_vtag is set, add it to the hash */
4102 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4103 /* put it in the bucket in the vtag hash of assoc's for the system */
4104 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4105 SCTP_INP_INFO_WUNLOCK();
4106
4107 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4108 /* failure.. memory error? */
4109 if (asoc->strmout) {
4110 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4111 asoc->strmout = NULL;
4112 }
4113 if (asoc->mapping_array) {
4114 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4115 asoc->mapping_array = NULL;
4116 }
4117 if (asoc->nr_mapping_array) {
4118 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4119 asoc->nr_mapping_array = NULL;
4120 }
4121 SCTP_DECR_ASOC_COUNT();
4122 SCTP_TCB_LOCK_DESTROY(stcb);
4123 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4124 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4126 SCTP_INP_WUNLOCK(inp);
4127 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4128 *error = ENOBUFS;
4129 return (NULL);
4130 }
4131 /* Init all the timers */
4132 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4133 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4134 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4135 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4136 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4137 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4138 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4139 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4140
4141 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4142 /* now file the port under the hash as well */
4143 if (inp->sctp_tcbhash != NULL) {
4144 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4145 inp->sctp_hashmark)];
4146 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4147 }
4148 SCTP_INP_WUNLOCK(inp);
4149 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4150 return (stcb);
4151 }
4152
4153
4154 void
4155 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4156 {
4157 struct sctp_association *asoc;
4158
4159 asoc = &stcb->asoc;
4160 asoc->numnets--;
4161 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4162 if (net == asoc->primary_destination) {
4163 /* Reset primary */
4164 struct sctp_nets *lnet;
4165
4166 lnet = TAILQ_FIRST(&asoc->nets);
4167 /*
4168 * Mobility adaptation Ideally, if deleted destination is
4169 * the primary, it becomes a fast retransmission trigger by
4170 * the subsequent SET PRIMARY. (by micchie)
4171 */
4172 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4173 SCTP_MOBILITY_BASE) ||
4174 sctp_is_mobility_feature_on(stcb->sctp_ep,
4175 SCTP_MOBILITY_FASTHANDOFF)) {
4176 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4177 if (asoc->deleted_primary != NULL) {
4178 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4179 goto out;
4180 }
4181 asoc->deleted_primary = net;
4182 atomic_add_int(&net->ref_count, 1);
4183 memset(&net->lastsa, 0, sizeof(net->lastsa));
4184 memset(&net->lastsv, 0, sizeof(net->lastsv));
4185 sctp_mobility_feature_on(stcb->sctp_ep,
4186 SCTP_MOBILITY_PRIM_DELETED);
4187 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4188 stcb->sctp_ep, stcb, NULL);
4189 }
4190 out:
4191 /* Try to find a confirmed primary */
4192 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4193 }
4194 if (net == asoc->last_data_chunk_from) {
4195 /* Reset primary */
4196 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4197 }
4198 if (net == asoc->last_control_chunk_from) {
4199 /* Clear net */
4200 asoc->last_control_chunk_from = NULL;
4201 }
4202 sctp_free_remote_addr(net);
4203 }
4204
4205 /*
4206 * remove a remote endpoint address from an association, it will fail if the
4207 * address does not exist.
4208 */
4209 int
4210 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4211 {
4212 /*
4213 * Here we need to remove a remote address. This is quite simple, we
4214 * first find it in the list of address for the association
4215 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4216 * on that item. Note we do not allow it to be removed if there are
4217 * no other addresses.
4218 */
4219 struct sctp_association *asoc;
4220 struct sctp_nets *net, *net_tmp;
4221
4222 asoc = &stcb->asoc;
4223
4224 /* locate the address */
4225 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4226 net_tmp = TAILQ_NEXT(net, sctp_next);
4227 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4228 continue;
4229 }
4230 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4231 remaddr)) {
4232 /* we found the guy */
4233 if (asoc->numnets < 2) {
4234 /* Must have at LEAST two remote addresses */
4235 return (-1);
4236 } else {
4237 sctp_remove_net(stcb, net);
4238 return (0);
4239 }
4240 }
4241 }
4242 /* not found. */
4243 return (-2);
4244 }
4245
4246 void
4247 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4248 {
4249 struct sctpvtaghead *chain;
4250 struct sctp_tagblock *twait_block;
4251 int found = 0;
4252 int i;
4253
4254 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4255 if (!LIST_EMPTY(chain)) {
4256 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4257 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4258 if ((twait_block->vtag_block[i].v_tag == tag) &&
4259 (twait_block->vtag_block[i].lport == lport) &&
4260 (twait_block->vtag_block[i].rport == rport)) {
4261 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4262 twait_block->vtag_block[i].v_tag = 0;
4263 twait_block->vtag_block[i].lport = 0;
4264 twait_block->vtag_block[i].rport = 0;
4265 found = 1;
4266 break;
4267 }
4268 }
4269 if (found)
4270 break;
4271 }
4272 }
4273 }
4274
4275 int
4276 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4277 {
4278 struct sctpvtaghead *chain;
4279 struct sctp_tagblock *twait_block;
4280 int found = 0;
4281 int i;
4282
4283 SCTP_INP_INFO_WLOCK();
4284 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4285 if (!LIST_EMPTY(chain)) {
4286 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4287 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4288 if ((twait_block->vtag_block[i].v_tag == tag) &&
4289 (twait_block->vtag_block[i].lport == lport) &&
4290 (twait_block->vtag_block[i].rport == rport)) {
4291 found = 1;
4292 break;
4293 }
4294 }
4295 if (found)
4296 break;
4297 }
4298 }
4299 SCTP_INP_INFO_WUNLOCK();
4300 return (found);
4301 }
4302
4303
4304 void
4305 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4306 {
4307 struct sctpvtaghead *chain;
4308 struct sctp_tagblock *twait_block;
4309 struct timeval now;
4310 int set, i;
4311
4312 (void)SCTP_GETTIME_TIMEVAL(&now);
4313 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4314 set = 0;
4315 if (!LIST_EMPTY(chain)) {
4316 /* Block(s) present, lets find space, and expire on the fly */
4317 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4318 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4319 if ((twait_block->vtag_block[i].v_tag == 0) &&
4320 !set) {
4321 twait_block->vtag_block[i].tv_sec_at_expire =
4322 now.tv_sec + time;
4323 twait_block->vtag_block[i].v_tag = tag;
4324 twait_block->vtag_block[i].lport = lport;
4325 twait_block->vtag_block[i].rport = rport;
4326 set = 1;
4327 } else if ((twait_block->vtag_block[i].v_tag) &&
4328 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4329 /* Audit expires this guy */
4330 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4331 twait_block->vtag_block[i].v_tag = 0;
4332 twait_block->vtag_block[i].lport = 0;
4333 twait_block->vtag_block[i].rport = 0;
4334 if (set == 0) {
4335 /* Reuse it for my new tag */
4336 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4337 twait_block->vtag_block[i].v_tag = tag;
4338 twait_block->vtag_block[i].lport = lport;
4339 twait_block->vtag_block[i].rport = rport;
4340 set = 1;
4341 }
4342 }
4343 }
4344 if (set) {
4345 /*
4346 * We only do up to the block where we can
4347 * place our tag for audits
4348 */
4349 break;
4350 }
4351 }
4352 }
4353 /* Need to add a new block to chain */
4354 if (!set) {
4355 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4356 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4357 if (twait_block == NULL) {
4358 #ifdef INVARIANTS
4359 panic("Can not alloc tagblock");
4360 #endif
4361 return;
4362 }
4363 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4364 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4365 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4366 twait_block->vtag_block[0].v_tag = tag;
4367 twait_block->vtag_block[0].lport = lport;
4368 twait_block->vtag_block[0].rport = rport;
4369 }
4370 }
4371
4372
4373 static void
4374 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4375 {
4376 struct sctp_iterator *it;
4377
4378 /*
4379 * Unlock the tcb lock we do this so we avoid a dead lock scenario
4380 * where the iterator is waiting on the TCB lock and the TCB lock is
4381 * waiting on the iterator lock.
4382 */
4383 it = stcb->asoc.stcb_starting_point_for_iterator;
4384 if (it == NULL) {
4385 return;
4386 }
4387 if (it->inp != stcb->sctp_ep) {
4388 /* hmm, focused on the wrong one? */
4389 return;
4390 }
4391 if (it->stcb != stcb) {
4392 return;
4393 }
4394 it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4395 if (it->stcb == NULL) {
4396 /* done with all asoc's in this assoc */
4397 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4398 it->inp = NULL;
4399 } else {
4400 it->inp = LIST_NEXT(inp, sctp_list);
4401 }
4402 }
4403 }
4404
4405
4406 /*-
4407 * Free the association after un-hashing the remote port. This
4408 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4409 * expect that the input to this function IS a locked TCB.
4410 * It will return 0, if it did NOT destroy the association (instead
4411 * it unlocks it. It will return NON-zero if it either destroyed the
4412 * association OR the association is already destroyed.
4413 */
4414 int
4415 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4416 {
4417 int i;
4418 struct sctp_association *asoc;
4419 struct sctp_nets *net, *prev;
4420 struct sctp_laddr *laddr;
4421 struct sctp_tmit_chunk *chk;
4422 struct sctp_asconf_addr *aparam;
4423 struct sctp_asconf_ack *aack;
4424 struct sctp_stream_reset_list *liste;
4425 struct sctp_queued_to_read *sq;
4426 struct sctp_stream_queue_pending *sp;
4427 sctp_sharedkey_t *shared_key;
4428 struct socket *so;
4429 int ccnt = 0;
4430 int cnt = 0;
4431
4432 /* first, lets purge the entry from the hash table. */
4433
4434 #ifdef SCTP_LOG_CLOSING
4435 sctp_log_closing(inp, stcb, 6);
4436 #endif
4437 if (stcb->asoc.state == 0) {
4438 #ifdef SCTP_LOG_CLOSING
4439 sctp_log_closing(inp, NULL, 7);
4440 #endif
4441 /* there is no asoc, really TSNH :-0 */
4442 return (1);
4443 }
4444 /* TEMP CODE */
4445 if (stcb->freed_from_where == 0) {
4446 /* Only record the first place free happened from */
4447 stcb->freed_from_where = from_location;
4448 }
4449 /* TEMP CODE */
4450
4451 asoc = &stcb->asoc;
4452 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4453 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4454 /* nothing around */
4455 so = NULL;
4456 else
4457 so = inp->sctp_socket;
4458
4459 /*
4460 * We used timer based freeing if a reader or writer is in the way.
4461 * So we first check if we are actually being called from a timer,
4462 * if so we abort early if a reader or writer is still in the way.
4463 */
4464 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4465 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4466 /*
4467 * is it the timer driving us? if so are the reader/writers
4468 * gone?
4469 */
4470 if (stcb->asoc.refcnt) {
4471 /* nope, reader or writer in the way */
4472 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4473 /* no asoc destroyed */
4474 SCTP_TCB_UNLOCK(stcb);
4475 #ifdef SCTP_LOG_CLOSING
4476 sctp_log_closing(inp, stcb, 8);
4477 #endif
4478 return (0);
4479 }
4480 }
4481 /* now clean up any other timers */
4482 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4483 asoc->hb_timer.self = NULL;
4484 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4485 asoc->dack_timer.self = NULL;
4486 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4487 /*-
4488 * For stream reset we don't blast this unless
4489 * it is a str-reset timer, it might be the
4490 * free-asoc timer which we DON'T want to
4491 * disturb.
4492 */
4493 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4494 asoc->strreset_timer.self = NULL;
4495 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4496 asoc->asconf_timer.self = NULL;
4497 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4498 asoc->autoclose_timer.self = NULL;
4499 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4500 asoc->shut_guard_timer.self = NULL;
4501 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4502 asoc->delayed_event_timer.self = NULL;
4503 /* Mobility adaptation */
4504 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4505 asoc->delete_prim_timer.self = NULL;
4506 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4507 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4508 net->fr_timer.self = NULL;
4509 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4510 net->rxt_timer.self = NULL;
4511 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4512 net->pmtu_timer.self = NULL;
4513 }
4514 /* Now the read queue needs to be cleaned up (only once) */
4515 cnt = 0;
4516 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4517 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4518 SCTP_INP_READ_LOCK(inp);
4519 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4520 if (sq->stcb == stcb) {
4521 sq->do_not_ref_stcb = 1;
4522 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4523 /*
4524 * If there is no end, there never will be
4525 * now.
4526 */
4527 if (sq->end_added == 0) {
4528 /* Held for PD-API clear that. */
4529 sq->pdapi_aborted = 1;
4530 sq->held_length = 0;
4531 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4532 /*
4533 * Need to add a PD-API
4534 * aborted indication.
4535 * Setting the control_pdapi
4536 * assures that it will be
4537 * added right after this
4538 * msg.
4539 */
4540 uint32_t strseq;
4541
4542 stcb->asoc.control_pdapi = sq;
4543 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4544 sctp_notify_partial_delivery_indication(stcb,
4545 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
4546 stcb->asoc.control_pdapi = NULL;
4547 }
4548 }
4549 /* Add an end to wake them */
4550 sq->end_added = 1;
4551 cnt++;
4552 }
4553 }
4554 SCTP_INP_READ_UNLOCK(inp);
4555 if (stcb->block_entry) {
4556 cnt++;
4557 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4558 stcb->block_entry->error = ECONNRESET;
4559 stcb->block_entry = NULL;
4560 }
4561 }
4562 if (stcb->asoc.refcnt) {
4563 /*
4564 * reader or writer in the way, we have hopefully given him
4565 * something to chew on above.
4566 */
4567 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4568 SCTP_TCB_UNLOCK(stcb);
4569 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4570 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4571 /* nothing around */
4572 so = NULL;
4573 if (so) {
4574 /* Wake any reader/writers */
4575 sctp_sorwakeup(inp, so);
4576 sctp_sowwakeup(inp, so);
4577 }
4578 #ifdef SCTP_LOG_CLOSING
4579 sctp_log_closing(inp, stcb, 9);
4580 #endif
4581 /* no asoc destroyed */
4582 return (0);
4583 }
4584 #ifdef SCTP_LOG_CLOSING
4585 sctp_log_closing(inp, stcb, 10);
4586 #endif
4587 /*
4588 * When I reach here, no others want to kill the assoc yet.. and I
4589 * own the lock. Now its possible an abort comes in when I do the
4590 * lock exchange below to grab all the locks to do the final take
4591 * out. to prevent this we increment the count, which will start a
4592 * timer and blow out above thus assuring us that we hold exclusive
4593 * killing of the asoc. Note that after getting back the TCB lock we
4594 * will go ahead and increment the counter back up and stop any
4595 * timer a passing stranger may have started :-S
4596 */
4597 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4598 atomic_add_int(&stcb->asoc.refcnt, 1);
4599
4600 SCTP_TCB_UNLOCK(stcb);
4601
4602 SCTP_ITERATOR_LOCK();
4603 SCTP_INP_INFO_WLOCK();
4604 SCTP_INP_WLOCK(inp);
4605 SCTP_TCB_LOCK(stcb);
4606 }
4607 /* Double check the GONE flag */
4608 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4609 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4610 /* nothing around */
4611 so = NULL;
4612
4613 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4614 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4615 /*
4616 * For TCP type we need special handling when we are
4617 * connected. We also include the peel'ed off ones to.
4618 */
4619 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4620 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4621 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4622 if (so) {
4623 SOCK_LOCK(so);
4624 if (so->so_rcv.sb_cc == 0) {
4625 so->so_state &= ~(SS_ISCONNECTING |
4626 SS_ISDISCONNECTING |
4627 SS_ISCONFIRMING |
4628 SS_ISCONNECTED);
4629 }
4630 SOCK_UNLOCK(so);
4631 socantrcvmore(so);
4632 sctp_sowwakeup(inp, so);
4633 sctp_sorwakeup(inp, so);
4634 SCTP_SOWAKEUP(so);
4635 }
4636 }
4637 }
4638 /*
4639 * Make it invalid too, that way if its about to run it will abort
4640 * and return.
4641 */
4642 sctp_iterator_asoc_being_freed(inp, stcb);
4643 /* re-increment the lock */
4644 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4645 atomic_add_int(&stcb->asoc.refcnt, -1);
4646 }
4647 asoc->state = 0;
4648 if (inp->sctp_tcbhash) {
4649 LIST_REMOVE(stcb, sctp_tcbhash);
4650 }
4651 if (stcb->asoc.in_asocid_hash) {
4652 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4653 }
4654 /* Now lets remove it from the list of ALL associations in the EP */
4655 LIST_REMOVE(stcb, sctp_tcblist);
4656 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4657 SCTP_INP_INCR_REF(inp);
4658 SCTP_INP_WUNLOCK(inp);
4659 SCTP_ITERATOR_UNLOCK();
4660 }
4661 /* pull from vtag hash */
4662 LIST_REMOVE(stcb, sctp_asocs);
4663 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport, SCTP_TIME_WAIT);
4664
4665 /*
4666 * Now restop the timers to be sure - this is paranoia at is finest!
4667 */
4668 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4669 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4670 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4671 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4672 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4673 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4674 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4675 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4676 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4677 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4678 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4679 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4680 }
4681
4682 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4683 prev = NULL;
4684 /*
4685 * The chunk lists and such SHOULD be empty but we check them just
4686 * in case.
4687 */
4688 /* anything on the wheel needs to be removed */
4689 for (i = 0; i < asoc->streamoutcnt; i++) {
4690 struct sctp_stream_out *outs;
4691
4692 outs = &asoc->strmout[i];
4693 /* now clean up any chunks here */
4694 sp = TAILQ_FIRST(&outs->outqueue);
4695 while (sp) {
4696 TAILQ_REMOVE(&outs->outqueue, sp, next);
4697 if (sp->data) {
4698 sctp_m_freem(sp->data);
4699 sp->data = NULL;
4700 sp->tail_mbuf = NULL;
4701 }
4702 sctp_free_remote_addr(sp->net);
4703 sctp_free_spbufspace(stcb, asoc, sp);
4704 if (sp->holds_key_ref)
4705 sctp_auth_key_release(stcb, sp->auth_keyid);
4706 /* Free the zone stuff */
4707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4708 SCTP_DECR_STRMOQ_COUNT();
4709 /* sa_ignore FREED_MEMORY */
4710 sp = TAILQ_FIRST(&outs->outqueue);
4711 }
4712 }
4713
4714 /* sa_ignore FREED_MEMORY */
4715 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4716 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4717 SCTP_FREE(liste, SCTP_M_STRESET);
4718 }
4719
4720 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4721 while (sq) {
4722 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4723 if (sq->data) {
4724 sctp_m_freem(sq->data);
4725 sq->data = NULL;
4726 }
4727 sctp_free_remote_addr(sq->whoFrom);
4728 sq->whoFrom = NULL;
4729 sq->stcb = NULL;
4730 /* Free the ctl entry */
4731 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4732 SCTP_DECR_READQ_COUNT();
4733 /* sa_ignore FREED_MEMORY */
4734 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4735 }
4736
4737 chk = TAILQ_FIRST(&asoc->free_chunks);
4738 while (chk) {
4739 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4740 if (chk->data) {
4741 sctp_m_freem(chk->data);
4742 chk->data = NULL;
4743 }
4744 if (chk->holds_key_ref)
4745 sctp_auth_key_release(stcb, chk->auth_keyid);
4746 ccnt++;
4747 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4748 SCTP_DECR_CHK_COUNT();
4749 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4750 asoc->free_chunk_cnt--;
4751 /* sa_ignore FREED_MEMORY */
4752 chk = TAILQ_FIRST(&asoc->free_chunks);
4753 }
4754 /* pending send queue SHOULD be empty */
4755 if (!TAILQ_EMPTY(&asoc->send_queue)) {
4756 chk = TAILQ_FIRST(&asoc->send_queue);
4757 while (chk) {
4758 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4759 if (chk->data) {
4760 sctp_m_freem(chk->data);
4761 chk->data = NULL;
4762 }
4763 if (chk->holds_key_ref)
4764 sctp_auth_key_release(stcb, chk->auth_keyid);
4765 ccnt++;
4766 sctp_free_remote_addr(chk->whoTo);
4767 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4768 SCTP_DECR_CHK_COUNT();
4769 /* sa_ignore FREED_MEMORY */
4770 chk = TAILQ_FIRST(&asoc->send_queue);
4771 }
4772 }
4773 /*
4774 if(ccnt) {
4775 printf("Freed %d from send_queue\n", ccnt);
4776 ccnt = 0;
4777 }
4778 */
4779 /* sent queue SHOULD be empty */
4780 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4781 chk = TAILQ_FIRST(&asoc->sent_queue);
4782 while (chk) {
4783 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4784 if (chk->data) {
4785 sctp_m_freem(chk->data);
4786 chk->data = NULL;
4787 }
4788 if (chk->holds_key_ref)
4789 sctp_auth_key_release(stcb, chk->auth_keyid);
4790 ccnt++;
4791 sctp_free_remote_addr(chk->whoTo);
4792 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4793 SCTP_DECR_CHK_COUNT();
4794 /* sa_ignore FREED_MEMORY */
4795 chk = TAILQ_FIRST(&asoc->sent_queue);
4796 }
4797 }
4798 /*
4799 if(ccnt) {
4800 printf("Freed %d from sent_queue\n", ccnt);
4801 ccnt = 0;
4802 }
4803 */
4804 /* control queue MAY not be empty */
4805 if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4806 chk = TAILQ_FIRST(&asoc->control_send_queue);
4807 while (chk) {
4808 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4809 if (chk->data) {
4810 sctp_m_freem(chk->data);
4811 chk->data = NULL;
4812 }
4813 if (chk->holds_key_ref)
4814 sctp_auth_key_release(stcb, chk->auth_keyid);
4815 ccnt++;
4816 sctp_free_remote_addr(chk->whoTo);
4817 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4818 SCTP_DECR_CHK_COUNT();
4819 /* sa_ignore FREED_MEMORY */
4820 chk = TAILQ_FIRST(&asoc->control_send_queue);
4821 }
4822 }
4823 /*
4824 if(ccnt) {
4825 printf("Freed %d from ctrl_queue\n", ccnt);
4826 ccnt = 0;
4827 }
4828 */
4829
4830 /* ASCONF queue MAY not be empty */
4831 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4832 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4833 while (chk) {
4834 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4835 if (chk->data) {
4836 sctp_m_freem(chk->data);
4837 chk->data = NULL;
4838 }
4839 if (chk->holds_key_ref)
4840 sctp_auth_key_release(stcb, chk->auth_keyid);
4841 ccnt++;
4842 sctp_free_remote_addr(chk->whoTo);
4843 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4844 SCTP_DECR_CHK_COUNT();
4845 /* sa_ignore FREED_MEMORY */
4846 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4847 }
4848 }
4849 /*
4850 if(ccnt) {
4851 printf("Freed %d from asconf_queue\n", ccnt);
4852 ccnt = 0;
4853 }
4854 */
4855 if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4856 chk = TAILQ_FIRST(&asoc->reasmqueue);
4857 while (chk) {
4858 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4859 if (chk->data) {
4860 sctp_m_freem(chk->data);
4861 chk->data = NULL;
4862 }
4863 if (chk->holds_key_ref)
4864 sctp_auth_key_release(stcb, chk->auth_keyid);
4865 sctp_free_remote_addr(chk->whoTo);
4866 ccnt++;
4867 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4868 SCTP_DECR_CHK_COUNT();
4869 /* sa_ignore FREED_MEMORY */
4870 chk = TAILQ_FIRST(&asoc->reasmqueue);
4871 }
4872 }
4873 /*
4874 if(ccnt) {
4875 printf("Freed %d from reasm_queue\n", ccnt);
4876 ccnt = 0;
4877 }
4878 */
4879 if (asoc->mapping_array) {
4880 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4881 asoc->mapping_array = NULL;
4882 }
4883 if (asoc->nr_mapping_array) {
4884 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4885 asoc->nr_mapping_array = NULL;
4886 }
4887 /* the stream outs */
4888 if (asoc->strmout) {
4889 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4890 asoc->strmout = NULL;
4891 }
4892 asoc->streamoutcnt = 0;
4893 if (asoc->strmin) {
4894 struct sctp_queued_to_read *ctl;
4895
4896 for (i = 0; i < asoc->streamincnt; i++) {
4897 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4898 /* We have somethings on the streamin queue */
4899 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4900 while (ctl) {
4901 TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4902 ctl, next);
4903 sctp_free_remote_addr(ctl->whoFrom);
4904 if (ctl->data) {
4905 sctp_m_freem(ctl->data);
4906 ctl->data = NULL;
4907 }
4908 /*
4909 * We don't free the address here
4910 * since all the net's were freed
4911 * above.
4912 */
4913 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4914 SCTP_DECR_READQ_COUNT();
4915 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4916 }
4917 }
4918 }
4919 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4920 asoc->strmin = NULL;
4921 }
4922 asoc->streamincnt = 0;
4923 while (!TAILQ_EMPTY(&asoc->nets)) {
4924 /* sa_ignore FREED_MEMORY */
4925 net = TAILQ_FIRST(&asoc->nets);
4926 /* pull from list */
4927 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
4928 #ifdef INVARIANTS
4929 panic("no net's left alloc'ed, or list points to itself");
4930 #endif
4931 break;
4932 }
4933 prev = net;
4934 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4935 sctp_free_remote_addr(net);
4936 }
4937
4938 while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4939 /* sa_ignore FREED_MEMORY */
4940 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4941 sctp_remove_laddr(laddr);
4942 }
4943
4944 /* pending asconf (address) parameters */
4945 while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4946 /* sa_ignore FREED_MEMORY */
4947 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4948 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4949 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4950 }
4951 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4952 /* sa_ignore FREED_MEMORY */
4953 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4954 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4955 if (aack->data != NULL) {
4956 sctp_m_freem(aack->data);
4957 }
4958 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
4959 }
4960 /* clean up auth stuff */
4961 if (asoc->local_hmacs)
4962 sctp_free_hmaclist(asoc->local_hmacs);
4963 if (asoc->peer_hmacs)
4964 sctp_free_hmaclist(asoc->peer_hmacs);
4965
4966 if (asoc->local_auth_chunks)
4967 sctp_free_chunklist(asoc->local_auth_chunks);
4968 if (asoc->peer_auth_chunks)
4969 sctp_free_chunklist(asoc->peer_auth_chunks);
4970
4971 sctp_free_authinfo(&asoc->authinfo);
4972
4973 shared_key = LIST_FIRST(&asoc->shared_keys);
4974 while (shared_key) {
4975 LIST_REMOVE(shared_key, next);
4976 sctp_free_sharedkey(shared_key);
4977 /* sa_ignore FREED_MEMORY */
4978 shared_key = LIST_FIRST(&asoc->shared_keys);
4979 }
4980
4981 /* Insert new items here :> */
4982
4983 /* Get rid of LOCK */
4984 SCTP_TCB_LOCK_DESTROY(stcb);
4985 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4986 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4987 SCTP_INP_INFO_WUNLOCK();
4988 SCTP_INP_RLOCK(inp);
4989 }
4990 #ifdef SCTP_TRACK_FREED_ASOCS
4991 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4992 /* now clean up the tasoc itself */
4993 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4994 SCTP_DECR_ASOC_COUNT();
4995 } else {
4996 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4997 }
4998 #else
4999 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5000 SCTP_DECR_ASOC_COUNT();
5001 #endif
5002 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5003 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5004 /*
5005 * If its NOT the inp_free calling us AND sctp_close
5006 * as been called, we call back...
5007 */
5008 SCTP_INP_RUNLOCK(inp);
5009 /*
5010 * This will start the kill timer (if we are the
5011 * lastone) since we hold an increment yet. But this
5012 * is the only safe way to do this since otherwise
5013 * if the socket closes at the same time we are here
5014 * we might collide in the cleanup.
5015 */
5016 sctp_inpcb_free(inp,
5017 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5018 SCTP_CALLED_DIRECTLY_NOCMPSET);
5019 SCTP_INP_DECR_REF(inp);
5020 goto out_of;
5021 } else {
5022 /* The socket is still open. */
5023 SCTP_INP_DECR_REF(inp);
5024 }
5025 }
5026 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5027 SCTP_INP_RUNLOCK(inp);
5028 }
5029 out_of:
5030 /* destroyed the asoc */
5031 #ifdef SCTP_LOG_CLOSING
5032 sctp_log_closing(inp, NULL, 11);
5033 #endif
5034 return (1);
5035 }
5036
5037
5038
5039 /*
5040 * determine if a destination is "reachable" based upon the addresses bound
5041 * to the current endpoint (e.g. only v4 or v6 currently bound)
5042 */
5043 /*
5044 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5045 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5046 * types bound as its endpoint
5047 */
5048 int
5049 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5050 {
5051 struct sctp_inpcb *inp;
5052 int answer;
5053
5054 /*
5055 * No locks here, the TCB, in all cases is already locked and an
5056 * assoc is up. There is either a INP lock by the caller applied (in
5057 * asconf case when deleting an address) or NOT in the HB case,
5058 * however if HB then the INP increment is up and the INP will not
5059 * be removed (on top of the fact that we have a TCB lock). So we
5060 * only want to read the sctp_flags, which is either bound-all or
5061 * not.. no protection needed since once an assoc is up you can't be
5062 * changing your binding.
5063 */
5064 inp = stcb->sctp_ep;
5065 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5066 /* if bound all, destination is not restricted */
5067 /*
5068 * RRS: Question during lock work: Is this correct? If you
5069 * are bound-all you still might need to obey the V4--V6
5070 * flags??? IMO this bound-all stuff needs to be removed!
5071 */
5072 return (1);
5073 }
5074 /* NOTE: all "scope" checks are done when local addresses are added */
5075 if (destaddr->sa_family == AF_INET6) {
5076 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5077 } else if (destaddr->sa_family == AF_INET) {
5078 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5079 } else {
5080 /* invalid family, so it's unreachable */
5081 answer = 0;
5082 }
5083 return (answer);
5084 }
5085
5086 /*
5087 * update the inp_vflags on an endpoint
5088 */
5089 static void
5090 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5091 {
5092 struct sctp_laddr *laddr;
5093
5094 /* first clear the flag */
5095 inp->ip_inp.inp.inp_vflag = 0;
5096 /* set the flag based on addresses on the ep list */
5097 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5098 if (laddr->ifa == NULL) {
5099 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5100 __FUNCTION__);
5101 continue;
5102 }
5103 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5104 continue;
5105 }
5106 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5107 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5108 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5109 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5110 }
5111 }
5112 }
5113
5114 /*
5115 * Add the address to the endpoint local address list There is nothing to be
5116 * done if we are bound to all addresses
5117 */
5118 void
5119 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5120 {
5121 struct sctp_laddr *laddr;
5122 int fnd, error = 0;
5123
5124 fnd = 0;
5125
5126 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5127 /* You are already bound to all. You have it already */
5128 return;
5129 }
5130 if (ifa->address.sa.sa_family == AF_INET6) {
5131 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5132 /* Can't bind a non-useable addr. */
5133 return;
5134 }
5135 }
5136 /* first, is it already present? */
5137 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5138 if (laddr->ifa == ifa) {
5139 fnd = 1;
5140 break;
5141 }
5142 }
5143
5144 if (fnd == 0) {
5145 /* Not in the ep list */
5146 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5147 if (error != 0)
5148 return;
5149 inp->laddr_count++;
5150 /* update inp_vflag flags */
5151 if (ifa->address.sa.sa_family == AF_INET6) {
5152 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5153 } else if (ifa->address.sa.sa_family == AF_INET) {
5154 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5155 }
5156 }
5157 return;
5158 }
5159
5160
5161 /*
5162 * select a new (hopefully reachable) destination net (should only be used
5163 * when we deleted an ep addr that is the only usable source address to reach
5164 * the destination net)
5165 */
5166 static void
5167 sctp_select_primary_destination(struct sctp_tcb *stcb)
5168 {
5169 struct sctp_nets *net;
5170
5171 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5172 /* for now, we'll just pick the first reachable one we find */
5173 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5174 continue;
5175 if (sctp_destination_is_reachable(stcb,
5176 (struct sockaddr *)&net->ro._l_addr)) {
5177 /* found a reachable destination */
5178 stcb->asoc.primary_destination = net;
5179 }
5180 }
5181 /* I can't there from here! ...we're gonna die shortly... */
5182 }
5183
5184
5185 /*
5186 * Delete the address from the endpoint local address list There is nothing
5187 * to be done if we are bound to all addresses
5188 */
5189 void
5190 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5191 {
5192 struct sctp_laddr *laddr;
5193 int fnd;
5194
5195 fnd = 0;
5196 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5197 /* You are already bound to all. You have it already */
5198 return;
5199 }
5200 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5201 if (laddr->ifa == ifa) {
5202 fnd = 1;
5203 break;
5204 }
5205 }
5206 if (fnd && (inp->laddr_count < 2)) {
5207 /* can't delete unless there are at LEAST 2 addresses */
5208 return;
5209 }
5210 if (fnd) {
5211 /*
5212 * clean up any use of this address go through our
5213 * associations and clear any last_used_address that match
5214 * this one for each assoc, see if a new primary_destination
5215 * is needed
5216 */
5217 struct sctp_tcb *stcb;
5218
5219 /* clean up "next_addr_touse" */
5220 if (inp->next_addr_touse == laddr)
5221 /* delete this address */
5222 inp->next_addr_touse = NULL;
5223
5224 /* clean up "last_used_address" */
5225 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5226 struct sctp_nets *net;
5227
5228 SCTP_TCB_LOCK(stcb);
5229 if (stcb->asoc.last_used_address == laddr)
5230 /* delete this address */
5231 stcb->asoc.last_used_address = NULL;
5232 /*
5233 * Now spin through all the nets and purge any ref
5234 * to laddr
5235 */
5236 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5237 if (net->ro._s_addr &&
5238 (net->ro._s_addr->ifa == laddr->ifa)) {
5239 /* Yep, purge src address selected */
5240 sctp_rtentry_t *rt;
5241
5242 /* delete this address if cached */
5243 rt = net->ro.ro_rt;
5244 if (rt != NULL) {
5245 RTFREE(rt);
5246 net->ro.ro_rt = NULL;
5247 }
5248 sctp_free_ifa(net->ro._s_addr);
5249 net->ro._s_addr = NULL;
5250 net->src_addr_selected = 0;
5251 }
5252 }
5253 SCTP_TCB_UNLOCK(stcb);
5254 } /* for each tcb */
5255 /* remove it from the ep list */
5256 sctp_remove_laddr(laddr);
5257 inp->laddr_count--;
5258 /* update inp_vflag flags */
5259 sctp_update_ep_vflag(inp);
5260 }
5261 return;
5262 }
5263
5264 /*
5265 * Add the address to the TCB local address restricted list.
5266 * This is a "pending" address list (eg. addresses waiting for an
5267 * ASCONF-ACK response) and cannot be used as a valid source address.
5268 */
5269 void
5270 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5271 {
5272 struct sctp_inpcb *inp;
5273 struct sctp_laddr *laddr;
5274 struct sctpladdr *list;
5275
5276 /*
5277 * Assumes TCB is locked.. and possibly the INP. May need to
5278 * confirm/fix that if we need it and is not the case.
5279 */
5280 list = &stcb->asoc.sctp_restricted_addrs;
5281
5282 inp = stcb->sctp_ep;
5283 if (ifa->address.sa.sa_family == AF_INET6) {
5284 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5285 /* Can't bind a non-existent addr. */
5286 return;
5287 }
5288 }
5289 /* does the address already exist? */
5290 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5291 if (laddr->ifa == ifa) {
5292 return;
5293 }
5294 }
5295
5296 /* add to the list */
5297 (void)sctp_insert_laddr(list, ifa, 0);
5298 return;
5299 }
5300
5301 /*
5302 * insert an laddr entry with the given ifa for the desired list
5303 */
5304 int
5305 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5306 {
5307 struct sctp_laddr *laddr;
5308
5309 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5310 if (laddr == NULL) {
5311 /* out of memory? */
5312 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5313 return (EINVAL);
5314 }
5315 SCTP_INCR_LADDR_COUNT();
5316 bzero(laddr, sizeof(*laddr));
5317 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5318 laddr->ifa = ifa;
5319 laddr->action = act;
5320 atomic_add_int(&ifa->refcount, 1);
5321 /* insert it */
5322 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5323
5324 return (0);
5325 }
5326
5327 /*
5328 * Remove an laddr entry from the local address list (on an assoc)
5329 */
5330 void
5331 sctp_remove_laddr(struct sctp_laddr *laddr)
5332 {
5333
5334 /* remove from the list */
5335 LIST_REMOVE(laddr, sctp_nxt_addr);
5336 sctp_free_ifa(laddr->ifa);
5337 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5338 SCTP_DECR_LADDR_COUNT();
5339 }
5340
5341 /*
5342 * Remove a local address from the TCB local address restricted list
5343 */
5344 void
5345 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5346 {
5347 struct sctp_inpcb *inp;
5348 struct sctp_laddr *laddr;
5349
5350 /*
5351 * This is called by asconf work. It is assumed that a) The TCB is
5352 * locked and b) The INP is locked. This is true in as much as I can
5353 * trace through the entry asconf code where I did these locks.
5354 * Again, the ASCONF code is a bit different in that it does lock
5355 * the INP during its work often times. This must be since we don't
5356 * want other proc's looking up things while what they are looking
5357 * up is changing :-D
5358 */
5359
5360 inp = stcb->sctp_ep;
5361 /* if subset bound and don't allow ASCONF's, can't delete last */
5362 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5363 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5364 if (stcb->sctp_ep->laddr_count < 2) {
5365 /* can't delete last address */
5366 return;
5367 }
5368 }
5369 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5370 /* remove the address if it exists */
5371 if (laddr->ifa == NULL)
5372 continue;
5373 if (laddr->ifa == ifa) {
5374 sctp_remove_laddr(laddr);
5375 return;
5376 }
5377 }
5378
5379 /* address not found! */
5380 return;
5381 }
5382
5383 /*
5384 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5385 */
5386 /* sysctl */
5387 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5388 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5389
5390 void
5391 sctp_pcb_init()
5392 {
5393 /*
5394 * SCTP initialization for the PCB structures should be called by
5395 * the sctp_init() funciton.
5396 */
5397 int i;
5398 struct timeval tv;
5399
5400 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5401 /* error I was called twice */
5402 return;
5403 }
5404 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5405
5406 #if defined(SCTP_LOCAL_TRACE_BUF)
5407 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5408 #endif
5409 (void)SCTP_GETTIME_TIMEVAL(&tv);
5410 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5411 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5412 /* init the empty list of (All) Endpoints */
5413 LIST_INIT(&SCTP_BASE_INFO(listhead));
5414
5415 /* init the iterator head */
5416 TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead));
5417
5418 /* init the hash table of endpoints */
5419 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5420 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5421 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5422 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5423 &SCTP_BASE_INFO(hashasocmark));
5424 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5425 &SCTP_BASE_INFO(hashmark));
5426 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5427 &SCTP_BASE_INFO(hashtcpmark));
5428 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5429
5430
5431 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5432 &SCTP_BASE_INFO(hashvrfmark));
5433
5434 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5435 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5436 /* init the zones */
5437 /*
5438 * FIX ME: Should check for NULL returns, but if it does fail we are
5439 * doomed to panic anyways... add later maybe.
5440 */
5441 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5442 sizeof(struct sctp_inpcb), maxsockets);
5443
5444 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5445 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5446
5447 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5448 sizeof(struct sctp_laddr),
5449 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5450
5451 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5452 sizeof(struct sctp_nets),
5453 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5454
5455 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5456 sizeof(struct sctp_tmit_chunk),
5457 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5458
5459 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5460 sizeof(struct sctp_queued_to_read),
5461 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5462
5463 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5464 sizeof(struct sctp_stream_queue_pending),
5465 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5466
5467 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5468 sizeof(struct sctp_asconf),
5469 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5470
5471 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5472 sizeof(struct sctp_asconf_ack),
5473 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5474
5475
5476 /* Master Lock INIT for info structure */
5477 SCTP_INP_INFO_LOCK_INIT();
5478 SCTP_STATLOG_INIT_LOCK();
5479 SCTP_ITERATOR_LOCK_INIT();
5480
5481 SCTP_IPI_COUNT_INIT();
5482 SCTP_IPI_ADDR_INIT();
5483 SCTP_IPI_ITERATOR_WQ_INIT();
5484 #ifdef SCTP_PACKET_LOGGING
5485 SCTP_IP_PKTLOG_INIT();
5486 #endif
5487 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5488
5489 /* not sure if we need all the counts */
5490 SCTP_BASE_INFO(ipi_count_ep) = 0;
5491 /* assoc/tcb zone info */
5492 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5493 /* local addrlist zone info */
5494 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5495 /* remote addrlist zone info */
5496 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5497 /* chunk info */
5498 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5499
5500 /* socket queue zone info */
5501 SCTP_BASE_INFO(ipi_count_readq) = 0;
5502
5503 /* stream out queue cont */
5504 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5505
5506 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5507 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5508
5509 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5510
5511 /* Init the TIMEWAIT list */
5512 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5513 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5514 }
5515
5516 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5517 SCTP_BASE_INFO(iterator_running) = 0;
5518 SCTP_BASE_INFO(threads_must_exit) = 0;
5519 sctp_startup_iterator();
5520 #endif
5521
5522 /*
5523 * INIT the default VRF which for BSD is the only one, other O/S's
5524 * may have more. But initially they must start with one and then
5525 * add the VRF's as addresses are added.
5526 */
5527 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5528
5529 }
5530
5531 /*
5532 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5533 */
5534 void
5535 sctp_pcb_finish(void)
5536 {
5537 struct sctp_vrflist *vrf_bucket;
5538 struct sctp_vrf *vrf;
5539 struct sctp_ifn *ifn;
5540 struct sctp_ifa *ifa;
5541 struct sctpvtaghead *chain;
5542 struct sctp_tagblock *twait_block, *prev_twait_block;
5543 int i;
5544
5545 /*
5546 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5547 * destroyed first).
5548 */
5549 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5550 vrf = LIST_FIRST(vrf_bucket);
5551 while (vrf) {
5552 ifn = LIST_FIRST(&vrf->ifnlist);
5553 while (ifn) {
5554 ifa = LIST_FIRST(&ifn->ifalist);
5555 while (ifa) {
5556 /* free the ifa */
5557 LIST_REMOVE(ifa, next_bucket);
5558 LIST_REMOVE(ifa, next_ifa);
5559 SCTP_FREE(ifa, SCTP_M_IFA);
5560 ifa = LIST_FIRST(&ifn->ifalist);
5561 }
5562 /* free the ifn */
5563 LIST_REMOVE(ifn, next_bucket);
5564 LIST_REMOVE(ifn, next_ifn);
5565 SCTP_FREE(ifn, SCTP_M_IFN);
5566 ifn = LIST_FIRST(&vrf->ifnlist);
5567 }
5568 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5569 /* free the vrf */
5570 LIST_REMOVE(vrf, next_vrf);
5571 SCTP_FREE(vrf, SCTP_M_VRF);
5572 vrf = LIST_FIRST(vrf_bucket);
5573 }
5574 /* free the vrf hashes */
5575 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5576 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5577
5578 /*
5579 * free the TIMEWAIT list elements malloc'd in the function
5580 * sctp_add_vtag_to_timewait()...
5581 */
5582 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5583 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5584 if (!LIST_EMPTY(chain)) {
5585 prev_twait_block = NULL;
5586 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5587 if (prev_twait_block) {
5588 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5589 }
5590 prev_twait_block = twait_block;
5591 }
5592 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5593 }
5594 }
5595
5596 /* free the locks and mutexes */
5597 #ifdef SCTP_PACKET_LOGGING
5598 SCTP_IP_PKTLOG_DESTROY();
5599
5600 #endif
5601 SCTP_IPI_ITERATOR_WQ_DESTROY();
5602 SCTP_IPI_ADDR_DESTROY();
5603 SCTP_ITERATOR_LOCK_DESTROY();
5604 SCTP_STATLOG_DESTROY();
5605 SCTP_INP_INFO_LOCK_DESTROY();
5606
5607 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5608 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5609 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5610 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5611 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5612 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5613 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5614 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5615 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5616 /* Get rid of other stuff to */
5617 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5618 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5619 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5620 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5621 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5622 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5623
5624 }
5625
5626
5627 int
5628 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5629 int iphlen, int offset, int limit, struct sctphdr *sh,
5630 struct sockaddr *altsa)
5631 {
5632 /*
5633 * grub through the INIT pulling addresses and loading them to the
5634 * nets structure in the asoc. The from address in the mbuf should
5635 * also be loaded (if it is not already). This routine can be called
5636 * with either INIT or INIT-ACK's as long as the m points to the IP
5637 * packet and the offset points to the beginning of the parameters.
5638 */
5639 struct sctp_inpcb *inp, *l_inp;
5640 struct sctp_nets *net, *net_tmp;
5641 struct ip *iph;
5642 struct sctp_paramhdr *phdr, parm_buf;
5643 struct sctp_tcb *stcb_tmp;
5644 uint16_t ptype, plen;
5645 struct sockaddr *sa;
5646 struct sockaddr_storage dest_store;
5647 struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5648 struct sockaddr_in sin;
5649 struct sockaddr_in6 sin6;
5650 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5651 struct sctp_auth_random *p_random = NULL;
5652 uint16_t random_len = 0;
5653 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5654 struct sctp_auth_hmac_algo *hmacs = NULL;
5655 uint16_t hmacs_len = 0;
5656 uint8_t saw_asconf = 0;
5657 uint8_t saw_asconf_ack = 0;
5658 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5659 struct sctp_auth_chunk_list *chunks = NULL;
5660 uint16_t num_chunks = 0;
5661 sctp_key_t *new_key;
5662 uint32_t keylen;
5663 int got_random = 0, got_hmacs = 0, got_chklist = 0;
5664
5665 /* First get the destination address setup too. */
5666 memset(&sin, 0, sizeof(sin));
5667 memset(&sin6, 0, sizeof(sin6));
5668
5669 sin.sin_family = AF_INET;
5670 sin.sin_len = sizeof(sin);
5671 sin.sin_port = stcb->rport;
5672
5673 sin6.sin6_family = AF_INET6;
5674 sin6.sin6_len = sizeof(struct sockaddr_in6);
5675 sin6.sin6_port = stcb->rport;
5676 if (altsa == NULL) {
5677 iph = mtod(m, struct ip *);
5678 switch (iph->ip_v) {
5679 case IPVERSION:
5680 {
5681 /* its IPv4 */
5682 struct sockaddr_in *sin_2;
5683
5684 sin_2 = (struct sockaddr_in *)(local_sa);
5685 memset(sin_2, 0, sizeof(sin));
5686 sin_2->sin_family = AF_INET;
5687 sin_2->sin_len = sizeof(sin);
5688 sin_2->sin_port = sh->dest_port;
5689 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5690 sin.sin_addr = iph->ip_src;
5691 sa = (struct sockaddr *)&sin;
5692 break;
5693 }
5694 #ifdef INET6
5695 case IPV6_VERSION >> 4:
5696 {
5697 /* its IPv6 */
5698 struct ip6_hdr *ip6;
5699 struct sockaddr_in6 *sin6_2;
5700
5701 ip6 = mtod(m, struct ip6_hdr *);
5702 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5703 memset(sin6_2, 0, sizeof(sin6));
5704 sin6_2->sin6_family = AF_INET6;
5705 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5706 sin6_2->sin6_port = sh->dest_port;
5707 sin6.sin6_addr = ip6->ip6_src;
5708 sa = (struct sockaddr *)&sin6;
5709 break;
5710 }
5711 #endif
5712 default:
5713 sa = NULL;
5714 break;
5715 }
5716 } else {
5717 /*
5718 * For cookies we use the src address NOT from the packet
5719 * but from the original INIT
5720 */
5721 sa = altsa;
5722 }
5723 /* Turn off ECN until we get through all params */
5724 stcb->asoc.ecn_allowed = 0;
5725 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5726 /* mark all addresses that we have currently on the list */
5727 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5728 }
5729 /* does the source address already exist? if so skip it */
5730 l_inp = inp = stcb->sctp_ep;
5731
5732 atomic_add_int(&stcb->asoc.refcnt, 1);
5733 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5734 atomic_add_int(&stcb->asoc.refcnt, -1);
5735
5736 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5737 /* we must add the source address */
5738 /* no scope set here since we have a tcb already. */
5739 if ((sa->sa_family == AF_INET) &&
5740 (stcb->asoc.ipv4_addr_legal)) {
5741 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5742 return (-1);
5743 }
5744 } else if ((sa->sa_family == AF_INET6) &&
5745 (stcb->asoc.ipv6_addr_legal)) {
5746 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5747 return (-2);
5748 }
5749 }
5750 } else {
5751 if (net_tmp != NULL && stcb_tmp == stcb) {
5752 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5753 } else if (stcb_tmp != stcb) {
5754 /* It belongs to another association? */
5755 if (stcb_tmp)
5756 SCTP_TCB_UNLOCK(stcb_tmp);
5757 return (-3);
5758 }
5759 }
5760 if (stcb->asoc.state == 0) {
5761 /* the assoc was freed? */
5762 return (-4);
5763 }
5764 /*
5765 * peer must explicitly turn this on. This may have been initialized
5766 * to be "on" in order to allow local addr changes while INIT's are
5767 * in flight.
5768 */
5769 stcb->asoc.peer_supports_asconf = 0;
5770 /* now we must go through each of the params. */
5771 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5772 while (phdr) {
5773 ptype = ntohs(phdr->param_type);
5774 plen = ntohs(phdr->param_length);
5775 /*
5776 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5777 * (int)plen);
5778 */
5779 if (offset + plen > limit) {
5780 break;
5781 }
5782 if (plen == 0) {
5783 break;
5784 }
5785 if (ptype == SCTP_IPV4_ADDRESS) {
5786 if (stcb->asoc.ipv4_addr_legal) {
5787 struct sctp_ipv4addr_param *p4, p4_buf;
5788
5789 /* ok get the v4 address and check/add */
5790 phdr = sctp_get_next_param(m, offset,
5791 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5792 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5793 phdr == NULL) {
5794 return (-5);
5795 }
5796 p4 = (struct sctp_ipv4addr_param *)phdr;
5797 sin.sin_addr.s_addr = p4->addr;
5798 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5799 /* Skip multi-cast addresses */
5800 goto next_param;
5801 }
5802 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5803 (sin.sin_addr.s_addr == INADDR_ANY)) {
5804 goto next_param;
5805 }
5806 sa = (struct sockaddr *)&sin;
5807 inp = stcb->sctp_ep;
5808 atomic_add_int(&stcb->asoc.refcnt, 1);
5809 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5810 local_sa, stcb);
5811 atomic_add_int(&stcb->asoc.refcnt, -1);
5812
5813 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5814 inp == NULL) {
5815 /* we must add the source address */
5816 /*
5817 * no scope set since we have a tcb
5818 * already
5819 */
5820
5821 /*
5822 * we must validate the state again
5823 * here
5824 */
5825 add_it_now:
5826 if (stcb->asoc.state == 0) {
5827 /* the assoc was freed? */
5828 return (-7);
5829 }
5830 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5831 return (-8);
5832 }
5833 } else if (stcb_tmp == stcb) {
5834 if (stcb->asoc.state == 0) {
5835 /* the assoc was freed? */
5836 return (-10);
5837 }
5838 if (net != NULL) {
5839 /* clear flag */
5840 net->dest_state &=
5841 ~SCTP_ADDR_NOT_IN_ASSOC;
5842 }
5843 } else {
5844 /*
5845 * strange, address is in another
5846 * assoc? straighten out locks.
5847 */
5848 if (stcb_tmp) {
5849 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5850 /*
5851 * in setup state we
5852 * abort this guy
5853 */
5854 sctp_abort_an_association(stcb_tmp->sctp_ep,
5855 stcb_tmp, 1, NULL, 0);
5856 goto add_it_now;
5857 }
5858 SCTP_TCB_UNLOCK(stcb_tmp);
5859 }
5860 if (stcb->asoc.state == 0) {
5861 /* the assoc was freed? */
5862 return (-12);
5863 }
5864 return (-13);
5865 }
5866 }
5867 } else if (ptype == SCTP_IPV6_ADDRESS) {
5868 if (stcb->asoc.ipv6_addr_legal) {
5869 /* ok get the v6 address and check/add */
5870 struct sctp_ipv6addr_param *p6, p6_buf;
5871
5872 phdr = sctp_get_next_param(m, offset,
5873 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5874 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5875 phdr == NULL) {
5876 return (-14);
5877 }
5878 p6 = (struct sctp_ipv6addr_param *)phdr;
5879 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5880 sizeof(p6->addr));
5881 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5882 /* Skip multi-cast addresses */
5883 goto next_param;
5884 }
5885 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5886 /*
5887 * Link local make no sense without
5888 * scope
5889 */
5890 goto next_param;
5891 }
5892 sa = (struct sockaddr *)&sin6;
5893 inp = stcb->sctp_ep;
5894 atomic_add_int(&stcb->asoc.refcnt, 1);
5895 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5896 local_sa, stcb);
5897 atomic_add_int(&stcb->asoc.refcnt, -1);
5898 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
5899 inp == NULL)) {
5900 /*
5901 * we must validate the state again
5902 * here
5903 */
5904 add_it_now6:
5905 if (stcb->asoc.state == 0) {
5906 /* the assoc was freed? */
5907 return (-16);
5908 }
5909 /*
5910 * we must add the address, no scope
5911 * set
5912 */
5913 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5914 return (-17);
5915 }
5916 } else if (stcb_tmp == stcb) {
5917 /*
5918 * we must validate the state again
5919 * here
5920 */
5921 if (stcb->asoc.state == 0) {
5922 /* the assoc was freed? */
5923 return (-19);
5924 }
5925 if (net != NULL) {
5926 /* clear flag */
5927 net->dest_state &=
5928 ~SCTP_ADDR_NOT_IN_ASSOC;
5929 }
5930 } else {
5931 /*
5932 * strange, address is in another
5933 * assoc? straighten out locks.
5934 */
5935 if (stcb_tmp)
5936 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5937 /*
5938 * in setup state we
5939 * abort this guy
5940 */
5941 sctp_abort_an_association(stcb_tmp->sctp_ep,
5942 stcb_tmp, 1, NULL, 0);
5943 goto add_it_now6;
5944 }
5945 SCTP_TCB_UNLOCK(stcb_tmp);
5946
5947 if (stcb->asoc.state == 0) {
5948 /* the assoc was freed? */
5949 return (-21);
5950 }
5951 return (-22);
5952 }
5953 }
5954 } else if (ptype == SCTP_ECN_CAPABLE) {
5955 stcb->asoc.ecn_allowed = 1;
5956 } else if (ptype == SCTP_ULP_ADAPTATION) {
5957 if (stcb->asoc.state != SCTP_STATE_OPEN) {
5958 struct sctp_adaptation_layer_indication ai,
5959 *aip;
5960
5961 phdr = sctp_get_next_param(m, offset,
5962 (struct sctp_paramhdr *)&ai, sizeof(ai));
5963 aip = (struct sctp_adaptation_layer_indication *)phdr;
5964 if (aip) {
5965 stcb->asoc.peers_adaptation = ntohl(aip->indication);
5966 stcb->asoc.adaptation_needed = 1;
5967 }
5968 }
5969 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5970 struct sctp_asconf_addr_param lstore, *fee;
5971 struct sctp_asconf_addrv4_param *fii;
5972 int lptype;
5973 struct sockaddr *lsa = NULL;
5974
5975 stcb->asoc.peer_supports_asconf = 1;
5976 if (plen > sizeof(lstore)) {
5977 return (-23);
5978 }
5979 phdr = sctp_get_next_param(m, offset,
5980 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5981 if (phdr == NULL) {
5982 return (-24);
5983 }
5984 fee = (struct sctp_asconf_addr_param *)phdr;
5985 lptype = ntohs(fee->addrp.ph.param_type);
5986 if (lptype == SCTP_IPV4_ADDRESS) {
5987 if (plen !=
5988 sizeof(struct sctp_asconf_addrv4_param)) {
5989 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5990 (int)sizeof(struct sctp_asconf_addrv4_param),
5991 plen);
5992 } else {
5993 fii = (struct sctp_asconf_addrv4_param *)fee;
5994 sin.sin_addr.s_addr = fii->addrp.addr;
5995 lsa = (struct sockaddr *)&sin;
5996 }
5997 } else if (lptype == SCTP_IPV6_ADDRESS) {
5998 if (plen !=
5999 sizeof(struct sctp_asconf_addr_param)) {
6000 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6001 (int)sizeof(struct sctp_asconf_addr_param),
6002 plen);
6003 } else {
6004 memcpy(sin6.sin6_addr.s6_addr,
6005 fee->addrp.addr,
6006 sizeof(fee->addrp.addr));
6007 lsa = (struct sockaddr *)&sin6;
6008 }
6009 }
6010 if (lsa) {
6011 (void)sctp_set_primary_addr(stcb, sa, NULL);
6012 }
6013 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6014 stcb->asoc.peer_supports_nat = 1;
6015 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6016 /* Peer supports pr-sctp */
6017 stcb->asoc.peer_supports_prsctp = 1;
6018 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6019 /* A supported extension chunk */
6020 struct sctp_supported_chunk_types_param *pr_supported;
6021 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6022 int num_ent, i;
6023
6024 phdr = sctp_get_next_param(m, offset,
6025 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6026 if (phdr == NULL) {
6027 return (-25);
6028 }
6029 stcb->asoc.peer_supports_asconf = 0;
6030 stcb->asoc.peer_supports_prsctp = 0;
6031 stcb->asoc.peer_supports_pktdrop = 0;
6032 stcb->asoc.peer_supports_strreset = 0;
6033 stcb->asoc.peer_supports_auth = 0;
6034 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6035 num_ent = plen - sizeof(struct sctp_paramhdr);
6036 for (i = 0; i < num_ent; i++) {
6037 switch (pr_supported->chunk_types[i]) {
6038 case SCTP_ASCONF:
6039 case SCTP_ASCONF_ACK:
6040 stcb->asoc.peer_supports_asconf = 1;
6041 break;
6042 case SCTP_FORWARD_CUM_TSN:
6043 stcb->asoc.peer_supports_prsctp = 1;
6044 break;
6045 case SCTP_PACKET_DROPPED:
6046 stcb->asoc.peer_supports_pktdrop = 1;
6047 break;
6048 case SCTP_STREAM_RESET:
6049 stcb->asoc.peer_supports_strreset = 1;
6050 break;
6051 case SCTP_AUTHENTICATION:
6052 stcb->asoc.peer_supports_auth = 1;
6053 break;
6054 default:
6055 /* one I have not learned yet */
6056 break;
6057
6058 }
6059 }
6060 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6061 /* Peer supports ECN-nonce */
6062 stcb->asoc.peer_supports_ecn_nonce = 1;
6063 stcb->asoc.ecn_nonce_allowed = 1;
6064 } else if (ptype == SCTP_RANDOM) {
6065 if (plen > sizeof(random_store))
6066 break;
6067 if (got_random) {
6068 /* already processed a RANDOM */
6069 goto next_param;
6070 }
6071 phdr = sctp_get_next_param(m, offset,
6072 (struct sctp_paramhdr *)random_store,
6073 min(sizeof(random_store), plen));
6074 if (phdr == NULL)
6075 return (-26);
6076 p_random = (struct sctp_auth_random *)phdr;
6077 random_len = plen - sizeof(*p_random);
6078 /* enforce the random length */
6079 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6080 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6081 return (-27);
6082 }
6083 got_random = 1;
6084 } else if (ptype == SCTP_HMAC_LIST) {
6085 int num_hmacs;
6086 int i;
6087
6088 if (plen > sizeof(hmacs_store))
6089 break;
6090 if (got_hmacs) {
6091 /* already processed a HMAC list */
6092 goto next_param;
6093 }
6094 phdr = sctp_get_next_param(m, offset,
6095 (struct sctp_paramhdr *)hmacs_store,
6096 min(plen, sizeof(hmacs_store)));
6097 if (phdr == NULL)
6098 return (-28);
6099 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6100 hmacs_len = plen - sizeof(*hmacs);
6101 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6102 /* validate the hmac list */
6103 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6104 return (-29);
6105 }
6106 if (stcb->asoc.peer_hmacs != NULL)
6107 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6108 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6109 if (stcb->asoc.peer_hmacs != NULL) {
6110 for (i = 0; i < num_hmacs; i++) {
6111 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6112 ntohs(hmacs->hmac_ids[i]));
6113 }
6114 }
6115 got_hmacs = 1;
6116 } else if (ptype == SCTP_CHUNK_LIST) {
6117 int i;
6118
6119 if (plen > sizeof(chunks_store))
6120 break;
6121 if (got_chklist) {
6122 /* already processed a Chunks list */
6123 goto next_param;
6124 }
6125 phdr = sctp_get_next_param(m, offset,
6126 (struct sctp_paramhdr *)chunks_store,
6127 min(plen, sizeof(chunks_store)));
6128 if (phdr == NULL)
6129 return (-30);
6130 chunks = (struct sctp_auth_chunk_list *)phdr;
6131 num_chunks = plen - sizeof(*chunks);
6132 if (stcb->asoc.peer_auth_chunks != NULL)
6133 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6134 else
6135 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6136 for (i = 0; i < num_chunks; i++) {
6137 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6138 stcb->asoc.peer_auth_chunks);
6139 /* record asconf/asconf-ack if listed */
6140 if (chunks->chunk_types[i] == SCTP_ASCONF)
6141 saw_asconf = 1;
6142 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6143 saw_asconf_ack = 1;
6144
6145 }
6146 got_chklist = 1;
6147 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6148 (ptype == SCTP_STATE_COOKIE) ||
6149 (ptype == SCTP_UNRECOG_PARAM) ||
6150 (ptype == SCTP_COOKIE_PRESERVE) ||
6151 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6152 (ptype == SCTP_ADD_IP_ADDRESS) ||
6153 (ptype == SCTP_DEL_IP_ADDRESS) ||
6154 (ptype == SCTP_ERROR_CAUSE_IND) ||
6155 (ptype == SCTP_SUCCESS_REPORT)) {
6156 /* don't care */ ;
6157 } else {
6158 if ((ptype & 0x8000) == 0x0000) {
6159 /*
6160 * must stop processing the rest of the
6161 * param's. Any report bits were handled
6162 * with the call to
6163 * sctp_arethere_unrecognized_parameters()
6164 * when the INIT or INIT-ACK was first seen.
6165 */
6166 break;
6167 }
6168 }
6169 next_param:
6170 offset += SCTP_SIZE32(plen);
6171 if (offset >= limit) {
6172 break;
6173 }
6174 phdr = sctp_get_next_param(m, offset, &parm_buf,
6175 sizeof(parm_buf));
6176 }
6177 /* Now check to see if we need to purge any addresses */
6178 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6179 net_tmp = TAILQ_NEXT(net, sctp_next);
6180 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6181 SCTP_ADDR_NOT_IN_ASSOC) {
6182 /* This address has been removed from the asoc */
6183 /* remove and free it */
6184 stcb->asoc.numnets--;
6185 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6186 sctp_free_remote_addr(net);
6187 if (net == stcb->asoc.primary_destination) {
6188 stcb->asoc.primary_destination = NULL;
6189 sctp_select_primary_destination(stcb);
6190 }
6191 }
6192 }
6193 /* validate authentication required parameters */
6194 if (got_random && got_hmacs) {
6195 stcb->asoc.peer_supports_auth = 1;
6196 } else {
6197 stcb->asoc.peer_supports_auth = 0;
6198 }
6199 if (!stcb->asoc.peer_supports_auth && got_chklist) {
6200 /* peer does not support auth but sent a chunks list? */
6201 return (-31);
6202 }
6203 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6204 !stcb->asoc.peer_supports_auth) {
6205 /* peer supports asconf but not auth? */
6206 return (-32);
6207 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6208 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6209 return (-33);
6210 }
6211 /* concatenate the full random key */
6212 #ifdef SCTP_AUTH_DRAFT_04
6213 keylen = random_len;
6214 new_key = sctp_alloc_key(keylen);
6215 if (new_key != NULL) {
6216 /* copy in the RANDOM */
6217 if (p_random != NULL)
6218 bcopy(p_random->random_data, new_key->key, random_len);
6219 }
6220 #else
6221 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
6222 sizeof(*hmacs) + hmacs_len;
6223 new_key = sctp_alloc_key(keylen);
6224 if (new_key != NULL) {
6225 /* copy in the RANDOM */
6226 if (p_random != NULL) {
6227 keylen = sizeof(*p_random) + random_len;
6228 bcopy(p_random, new_key->key, keylen);
6229 }
6230 /* append in the AUTH chunks */
6231 if (chunks != NULL) {
6232 bcopy(chunks, new_key->key + keylen,
6233 sizeof(*chunks) + num_chunks);
6234 keylen += sizeof(*chunks) + num_chunks;
6235 }
6236 /* append in the HMACs */
6237 if (hmacs != NULL) {
6238 bcopy(hmacs, new_key->key + keylen,
6239 sizeof(*hmacs) + hmacs_len);
6240 }
6241 }
6242 #endif
6243 else {
6244 /* failed to get memory for the key */
6245 return (-34);
6246 }
6247 if (stcb->asoc.authinfo.peer_random != NULL)
6248 sctp_free_key(stcb->asoc.authinfo.peer_random);
6249 stcb->asoc.authinfo.peer_random = new_key;
6250 #ifdef SCTP_AUTH_DRAFT_04
6251 /* don't include the chunks and hmacs for draft -04 */
6252 stcb->asoc.authinfo.peer_random->keylen = random_len;
6253 #endif
6254 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6255 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6256
6257 return (0);
6258 }
6259
6260 int
6261 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6262 struct sctp_nets *net)
6263 {
6264 /* make sure the requested primary address exists in the assoc */
6265 if (net == NULL && sa)
6266 net = sctp_findnet(stcb, sa);
6267
6268 if (net == NULL) {
6269 /* didn't find the requested primary address! */
6270 return (-1);
6271 } else {
6272 /* set the primary address */
6273 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6274 /* Must be confirmed, so queue to set */
6275 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6276 return (0);
6277 }
6278 stcb->asoc.primary_destination = net;
6279 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6280 net = TAILQ_FIRST(&stcb->asoc.nets);
6281 if (net != stcb->asoc.primary_destination) {
6282 /*
6283 * first one on the list is NOT the primary
6284 * sctp_cmpaddr() is much more efficent if the
6285 * primary is the first on the list, make it so.
6286 */
6287 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6288 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6289 }
6290 return (0);
6291 }
6292 }
6293
6294 int
6295 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6296 {
6297 /*
6298 * This function serves two purposes. It will see if a TAG can be
6299 * re-used and return 1 for yes it is ok and 0 for don't use that
6300 * tag. A secondary function it will do is purge out old tags that
6301 * can be removed.
6302 */
6303 struct sctpvtaghead *chain;
6304 struct sctp_tagblock *twait_block;
6305 struct sctpasochead *head;
6306 struct sctp_tcb *stcb;
6307 int i;
6308
6309 SCTP_INP_INFO_RLOCK();
6310 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6311 SCTP_BASE_INFO(hashasocmark))];
6312 if (head == NULL) {
6313 /* invalid vtag */
6314 goto skip_vtag_check;
6315 }
6316 LIST_FOREACH(stcb, head, sctp_asocs) {
6317 /*
6318 * We choose not to lock anything here. TCB's can't be
6319 * removed since we have the read lock, so they can't be
6320 * freed on us, same thing for the INP. I may be wrong with
6321 * this assumption, but we will go with it for now :-)
6322 */
6323 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6324 continue;
6325 }
6326 if (stcb->asoc.my_vtag == tag) {
6327 /* candidate */
6328 if (stcb->rport != rport) {
6329 continue;
6330 }
6331 if (stcb->sctp_ep->sctp_lport != lport) {
6332 continue;
6333 }
6334 /* Its a used tag set */
6335 SCTP_INP_INFO_WUNLOCK();
6336 return (0);
6337 }
6338 }
6339 skip_vtag_check:
6340
6341 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6342 /* Now what about timed wait ? */
6343 if (!LIST_EMPTY(chain)) {
6344 /*
6345 * Block(s) are present, lets see if we have this tag in the
6346 * list
6347 */
6348 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6349 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6350 if (twait_block->vtag_block[i].v_tag == 0) {
6351 /* not used */
6352 continue;
6353 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6354 now->tv_sec) {
6355 /* Audit expires this guy */
6356 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6357 twait_block->vtag_block[i].v_tag = 0;
6358 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6359 (twait_block->vtag_block[i].lport == lport) &&
6360 (twait_block->vtag_block[i].rport == rport)) {
6361 /* Bad tag, sorry :< */
6362 SCTP_INP_INFO_WUNLOCK();
6363 return (0);
6364 }
6365 }
6366 }
6367 }
6368 SCTP_INP_INFO_RUNLOCK();
6369 return (1);
6370 }
6371
6372
6373 static sctp_assoc_t reneged_asoc_ids[256];
6374 static uint8_t reneged_at = 0;
6375
6376
6377 static void
6378 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6379 {
6380 /*
6381 * We must hunt this association for MBUF's past the cumack (i.e.
6382 * out of order data that we can renege on).
6383 */
6384 struct sctp_association *asoc;
6385 struct sctp_tmit_chunk *chk, *nchk;
6386 uint32_t cumulative_tsn_p1, tsn;
6387 struct sctp_queued_to_read *ctl, *nctl;
6388 int cnt, strmat, gap;
6389
6390 /* We look for anything larger than the cum-ack + 1 */
6391
6392 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6393 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6394 return;
6395 }
6396 asoc = &stcb->asoc;
6397 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6398 /* none we can reneg on. */
6399 return;
6400 }
6401 SCTP_STAT_INCR(sctps_protocol_drains_done);
6402 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6403 cnt = 0;
6404 /* First look in the re-assembly queue */
6405 chk = TAILQ_FIRST(&asoc->reasmqueue);
6406 while (chk) {
6407 /* Get the next one */
6408 nchk = TAILQ_NEXT(chk, sctp_next);
6409 if (compare_with_wrap(chk->rec.data.TSN_seq,
6410 cumulative_tsn_p1, MAX_TSN)) {
6411 /* Yep it is above cum-ack */
6412 cnt++;
6413 tsn = chk->rec.data.TSN_seq;
6414 if (tsn >= asoc->mapping_array_base_tsn) {
6415 gap = tsn - asoc->mapping_array_base_tsn;
6416 } else {
6417 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6418 tsn + 1;
6419 }
6420 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6421 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6422 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6423 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6424 if (chk->data) {
6425 sctp_m_freem(chk->data);
6426 chk->data = NULL;
6427 }
6428 sctp_free_a_chunk(stcb, chk);
6429 }
6430 chk = nchk;
6431 }
6432 /* Ok that was fun, now we will drain all the inbound streams? */
6433 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6434 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6435 while (ctl) {
6436 nctl = TAILQ_NEXT(ctl, next);
6437 if (compare_with_wrap(ctl->sinfo_tsn,
6438 cumulative_tsn_p1, MAX_TSN)) {
6439 /* Yep it is above cum-ack */
6440 cnt++;
6441 tsn = ctl->sinfo_tsn;
6442 if (tsn >= asoc->mapping_array_base_tsn) {
6443 gap = tsn -
6444 asoc->mapping_array_base_tsn;
6445 } else {
6446 gap = (MAX_TSN -
6447 asoc->mapping_array_base_tsn) +
6448 tsn + 1;
6449 }
6450 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6451 sctp_ucount_decr(asoc->cnt_on_all_streams);
6452
6453 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
6454 gap);
6455 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
6456 ctl, next);
6457 if (ctl->data) {
6458 sctp_m_freem(ctl->data);
6459 ctl->data = NULL;
6460 }
6461 sctp_free_remote_addr(ctl->whoFrom);
6462 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6463 SCTP_DECR_READQ_COUNT();
6464 }
6465 ctl = nctl;
6466 }
6467 }
6468 /*
6469 * Question, should we go through the delivery queue? The only
6470 * reason things are on here is the app not reading OR a p-d-api up.
6471 * An attacker COULD send enough in to initiate the PD-API and then
6472 * send a bunch of stuff to other streams... these would wind up on
6473 * the delivery queue.. and then we would not get to them. But in
6474 * order to do this I then have to back-track and un-deliver
6475 * sequence numbers in streams.. el-yucko. I think for now we will
6476 * NOT look at the delivery queue and leave it to be something to
6477 * consider later. An alternative would be to abort the P-D-API with
6478 * a notification and then deliver the data.... Or another method
6479 * might be to keep track of how many times the situation occurs and
6480 * if we see a possible attack underway just abort the association.
6481 */
6482 #ifdef SCTP_DEBUG
6483 if (cnt) {
6484 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6485 }
6486 #endif
6487 if (cnt) {
6488 /*
6489 * Now do we need to find a new
6490 * asoc->highest_tsn_inside_map?
6491 */
6492 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6493 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6494 } else {
6495 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6496 asoc->highest_tsn_inside_map + 1;
6497 }
6498 if (gap >= (asoc->mapping_array_size << 3)) {
6499 /*
6500 * Something bad happened or cum-ack and high were
6501 * behind the base, but if so earlier checks should
6502 * have found NO data... wierd... we will start at
6503 * end of mapping array.
6504 */
6505 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6506 (int)gap,
6507 (int)(asoc->mapping_array_size << 3),
6508 (int)asoc->highest_tsn_inside_map);
6509 gap = asoc->mapping_array_size << 3;
6510 }
6511 while (gap > 0) {
6512 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6513 /* found the new highest */
6514 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6515 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6516 sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6517 }
6518 break;
6519 }
6520 gap--;
6521 }
6522 if (gap == 0) {
6523 /* Nothing left in map */
6524 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6525 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6526 asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6527 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6528 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6529 }
6530 }
6531 asoc->last_revoke_count = cnt;
6532 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6533 /* sa_ignore NO_NULL_CHK */
6534 sctp_send_sack(stcb);
6535 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6536 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6537 reneged_at++;
6538 }
6539 /*
6540 * Another issue, in un-setting the TSN's in the mapping array we
6541 * DID NOT adjust the higest_tsn marker. This will cause one of two
6542 * things to occur. It may cause us to do extra work in checking for
6543 * our mapping array movement. More importantly it may cause us to
6544 * SACK every datagram. This may not be a bad thing though since we
6545 * will recover once we get our cum-ack above and all this stuff we
6546 * dumped recovered.
6547 */
6548 }
6549
6550 void
6551 sctp_drain()
6552 {
6553 /*
6554 * We must walk the PCB lists for ALL associations here. The system
6555 * is LOW on MBUF's and needs help. This is where reneging will
6556 * occur. We really hope this does NOT happen!
6557 */
6558 struct sctp_inpcb *inp;
6559 struct sctp_tcb *stcb;
6560
6561 SCTP_INP_INFO_RLOCK();
6562 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6563 /* For each endpoint */
6564 SCTP_INP_RLOCK(inp);
6565 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6566 /* For each association */
6567 SCTP_TCB_LOCK(stcb);
6568 sctp_drain_mbufs(inp, stcb);
6569 SCTP_TCB_UNLOCK(stcb);
6570 }
6571 SCTP_INP_RUNLOCK(inp);
6572 }
6573 SCTP_INP_INFO_RUNLOCK();
6574 }
6575
6576 /*
6577 * start a new iterator
6578 * iterates through all endpoints and associations based on the pcb_state
6579 * flags and asoc_state. "af" (mandatory) is executed for all matching
6580 * assocs and "ef" (optional) is executed when the iterator completes.
6581 * "inpf" (optional) is executed for each new endpoint as it is being
6582 * iterated through. inpe (optional) is called when the inp completes
6583 * its way through all the stcbs.
6584 */
6585 int
6586 sctp_initiate_iterator(inp_func inpf,
6587 asoc_func af,
6588 inp_func inpe,
6589 uint32_t pcb_state,
6590 uint32_t pcb_features,
6591 uint32_t asoc_state,
6592 void *argp,
6593 uint32_t argi,
6594 end_func ef,
6595 struct sctp_inpcb *s_inp,
6596 uint8_t chunk_output_off)
6597 {
6598 struct sctp_iterator *it = NULL;
6599
6600 if (af == NULL) {
6601 return (-1);
6602 }
6603 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6604 SCTP_M_ITER);
6605 if (it == NULL) {
6606 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6607 return (ENOMEM);
6608 }
6609 memset(it, 0, sizeof(*it));
6610 it->function_assoc = af;
6611 it->function_inp = inpf;
6612 if (inpf)
6613 it->done_current_ep = 0;
6614 else
6615 it->done_current_ep = 1;
6616 it->function_atend = ef;
6617 it->pointer = argp;
6618 it->val = argi;
6619 it->pcb_flags = pcb_state;
6620 it->pcb_features = pcb_features;
6621 it->asoc_state = asoc_state;
6622 it->function_inp_end = inpe;
6623 it->no_chunk_output = chunk_output_off;
6624 if (s_inp) {
6625 it->inp = s_inp;
6626 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6627 } else {
6628 SCTP_INP_INFO_RLOCK();
6629 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6630
6631 SCTP_INP_INFO_RUNLOCK();
6632 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6633
6634 }
6635 SCTP_IPI_ITERATOR_WQ_LOCK();
6636 if (it->inp) {
6637 SCTP_INP_INCR_REF(it->inp);
6638 }
6639 TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr);
6640 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6641 if (SCTP_BASE_INFO(iterator_running) == 0) {
6642 sctp_wakeup_iterator();
6643 }
6644 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6645 #else
6646 if (it->inp)
6647 SCTP_INP_DECR_REF(it->inp);
6648 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6649 /* Init the timer */
6650 SCTP_OS_TIMER_INIT(&it->tmr.timer);
6651 /* add to the list of all iterators */
6652 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6653 NULL, NULL);
6654 #endif
6655 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6656 return (0);
6657 }
Cache object: 2540d8781952c4df42503a0267d25304
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