1 /*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #ifdef __FreeBSD__
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 265455 2014-05-06 16:51:07Z tuexen $");
36 #endif
37
38 #include <netinet/sctp_os.h>
39 #ifdef __FreeBSD__
40 #include <sys/proc.h>
41 #endif
42 #include <netinet/sctp_var.h>
43 #include <netinet/sctp_sysctl.h>
44 #include <netinet/sctp_pcb.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp.h>
47 #include <netinet/sctp_header.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_output.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_bsd_addr.h>
52 #if defined(__FreeBSD__) && __FreeBSD_version >= 803000
53 #include <netinet/sctp_dtrace_define.h>
54 #endif
55 #if !defined(__Userspace_os_Windows)
56 #include <netinet/udp.h>
57 #endif
58 #ifdef INET6
59 #if defined(__Userspace__)
60 #include "user_ip6_var.h"
61 #else
62 #include <netinet6/ip6_var.h>
63 #endif
64 #endif
65 #if defined(__FreeBSD__)
66 #include <sys/sched.h>
67 #include <sys/smp.h>
68 #include <sys/unistd.h>
69 #endif
70 #if defined(__Userspace__)
71 #include <user_socketvar.h>
72 #endif
73
74 #if defined(__APPLE__)
75 #define APPLE_FILE_NO 4
76 #endif
77
78 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
79 VNET_DEFINE(struct sctp_base_info, system_base_info);
80 #else
81 struct sctp_base_info system_base_info;
82 #endif
83
84 #if defined(__Userspace__)
85 #if defined(INET) || defined(INET6)
86 struct ifaddrs *g_interfaces;
87 #endif
88 #endif
89 /* FIX: we don't handle multiple link local scopes */
90 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
91 #ifdef INET6
92 int
SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 * a,struct sockaddr_in6 * b)93 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
94 {
95 #ifdef SCTP_EMBEDDED_V6_SCOPE
96 #if defined(__APPLE__)
97 struct in6_addr tmp_a, tmp_b;
98
99 tmp_a = a->sin6_addr;
100 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
101 if (in6_embedscope(&tmp_a, a, NULL, NULL) != 0) {
102 #else
103 if (in6_embedscope(&tmp_a, a, NULL, NULL, NULL) != 0) {
104 #endif
105 return (0);
106 }
107 tmp_b = b->sin6_addr;
108 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
109 if (in6_embedscope(&tmp_b, b, NULL, NULL) != 0) {
110 #else
111 if (in6_embedscope(&tmp_b, b, NULL, NULL, NULL) != 0) {
112 #endif
113 return (0);
114 }
115 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
116 #elif defined(SCTP_KAME)
117 struct sockaddr_in6 tmp_a, tmp_b;
118
119 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
120 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
121 return (0);
122 }
123 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
124 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
125 return (0);
126 }
127 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
128 #else
129 struct in6_addr tmp_a, tmp_b;
130
131 tmp_a = a->sin6_addr;
132 if (in6_embedscope(&tmp_a, a) != 0) {
133 return (0);
134 }
135 tmp_b = b->sin6_addr;
136 if (in6_embedscope(&tmp_b, b) != 0) {
137 return (0);
138 }
139 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
140 #endif
141 #else
142 return (IN6_ARE_ADDR_EQUAL(&(a->sin6_addr), &(b->sin6_addr)));
143 #endif /* SCTP_EMBEDDED_V6_SCOPE */
144 }
145 #endif
146
147 void
148 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
149 {
150 /*
151 * We really don't need to lock this, but I will just because it
152 * does not hurt.
153 */
154 SCTP_INP_INFO_RLOCK();
155 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
156 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
157 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
158 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
159 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
160 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
161 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
162 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
163 SCTP_INP_INFO_RUNLOCK();
164 }
165
166 /*-
167 * Addresses are added to VRF's (Virtual Router's). For BSD we
168 * have only the default VRF 0. We maintain a hash list of
169 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
170 * these has a list of addresses. When we add a new address
171 * to a VRF we lookup the ifn/ifn_index, if the ifn does
172 * not exist we create it and add it to the list of IFN's
173 * within the VRF. Once we have the sctp_ifn, we add the
174 * address to the list. So we look something like:
175 *
176 * hash-vrf-table
177 * vrf-> ifn-> ifn -> ifn
178 * vrf |
179 * ... +--ifa-> ifa -> ifa
180 * vrf
181 *
182 * We keep these separate lists since the SCTP subsystem will
183 * point to these from its source address selection nets structure.
184 * When an address is deleted it does not happen right away on
185 * the SCTP side, it gets scheduled. What we do when a
186 * delete happens is immediately remove the address from
187 * the master list and decrement the refcount. As our
188 * addip iterator works through and frees the src address
189 * selection pointing to the sctp_ifa, eventually the refcount
190 * will reach 0 and we will delete it. Note that it is assumed
191 * that any locking on system level ifn/ifa is done at the
192 * caller of these functions and these routines will only
193 * lock the SCTP structures as they add or delete things.
194 *
195 * Other notes on VRF concepts.
196 * - An endpoint can be in multiple VRF's
197 * - An association lives within a VRF and only one VRF.
198 * - Any incoming packet we can deduce the VRF for by
199 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
200 * - Any downward send call or connect call must supply the
201 * VRF via ancillary data or via some sort of set default
202 * VRF socket option call (again for BSD no brainer since
203 * the VRF is always 0).
204 * - An endpoint may add multiple VRF's to it.
205 * - Listening sockets can accept associations in any
206 * of the VRF's they are in but the assoc will end up
207 * in only one VRF (gotten from the packet or connect/send).
208 *
209 */
210
211 struct sctp_vrf *
212 sctp_allocate_vrf(int vrf_id)
213 {
214 struct sctp_vrf *vrf = NULL;
215 struct sctp_vrflist *bucket;
216
217 /* First allocate the VRF structure */
218 vrf = sctp_find_vrf(vrf_id);
219 if (vrf) {
220 /* Already allocated */
221 return (vrf);
222 }
223 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
224 SCTP_M_VRF);
225 if (vrf == NULL) {
226 /* No memory */
227 #ifdef INVARIANTS
228 panic("No memory for VRF:%d", vrf_id);
229 #endif
230 return (NULL);
231 }
232 /* setup the VRF */
233 memset(vrf, 0, sizeof(struct sctp_vrf));
234 vrf->vrf_id = vrf_id;
235 LIST_INIT(&vrf->ifnlist);
236 vrf->total_ifa_count = 0;
237 vrf->refcount = 0;
238 /* now also setup table ids */
239 SCTP_INIT_VRF_TABLEID(vrf);
240 /* Init the HASH of addresses */
241 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
242 &vrf->vrf_addr_hashmark);
243 if (vrf->vrf_addr_hash == NULL) {
244 /* No memory */
245 #ifdef INVARIANTS
246 panic("No memory for VRF:%d", vrf_id);
247 #endif
248 SCTP_FREE(vrf, SCTP_M_VRF);
249 return (NULL);
250 }
251
252 /* Add it to the hash table */
253 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
254 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
255 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
256 return (vrf);
257 }
258
259
260 struct sctp_ifn *
261 sctp_find_ifn(void *ifn, uint32_t ifn_index)
262 {
263 struct sctp_ifn *sctp_ifnp;
264 struct sctp_ifnlist *hash_ifn_head;
265
266 /* We assume the lock is held for the addresses
267 * if that's wrong problems could occur :-)
268 */
269 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
270 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
271 if (sctp_ifnp->ifn_index == ifn_index) {
272 return (sctp_ifnp);
273 }
274 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
275 return (sctp_ifnp);
276 }
277 }
278 return (NULL);
279 }
280
281
282 struct sctp_vrf *
283 sctp_find_vrf(uint32_t vrf_id)
284 {
285 struct sctp_vrflist *bucket;
286 struct sctp_vrf *liste;
287
288 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
289 LIST_FOREACH(liste, bucket, next_vrf) {
290 if (vrf_id == liste->vrf_id) {
291 return (liste);
292 }
293 }
294 return (NULL);
295 }
296
297
298 void
299 sctp_free_vrf(struct sctp_vrf *vrf)
300 {
301 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
302 if (vrf->vrf_addr_hash) {
303 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
304 vrf->vrf_addr_hash = NULL;
305 }
306 /* We zero'd the count */
307 LIST_REMOVE(vrf, next_vrf);
308 SCTP_FREE(vrf, SCTP_M_VRF);
309 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
310 }
311 }
312
313
314 void
315 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
316 {
317 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
318 /* We zero'd the count */
319 if (sctp_ifnp->vrf) {
320 sctp_free_vrf(sctp_ifnp->vrf);
321 }
322 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
323 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
324 }
325 }
326
327
328 void
329 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
330 {
331 struct sctp_ifn *sctp_ifnp;
332
333 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
334 if (sctp_ifnp != NULL) {
335 sctp_ifnp->ifn_mtu = mtu;
336 }
337 }
338
339
340 void
341 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
342 {
343 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
344 /* We zero'd the count */
345 if (sctp_ifap->ifn_p) {
346 sctp_free_ifn(sctp_ifap->ifn_p);
347 }
348 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
349 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
350 }
351 }
352
353
354 static void
355 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
356 {
357 struct sctp_ifn *found;
358
359 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
360 if (found == NULL) {
361 /* Not in the list.. sorry */
362 return;
363 }
364 if (hold_addr_lock == 0)
365 SCTP_IPI_ADDR_WLOCK();
366 LIST_REMOVE(sctp_ifnp, next_bucket);
367 LIST_REMOVE(sctp_ifnp, next_ifn);
368 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
369 sctp_ifnp->registered_af);
370 if (hold_addr_lock == 0)
371 SCTP_IPI_ADDR_WUNLOCK();
372 /* Take away the reference, and possibly free it */
373 sctp_free_ifn(sctp_ifnp);
374 }
375
376
377 void
378 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
379 const char *if_name, uint32_t ifn_index)
380 {
381 struct sctp_vrf *vrf;
382 struct sctp_ifa *sctp_ifap;
383
384 SCTP_IPI_ADDR_RLOCK();
385 vrf = sctp_find_vrf(vrf_id);
386 if (vrf == NULL) {
387 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
388 goto out;
389
390 }
391 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
392 if (sctp_ifap == NULL) {
393 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
394 goto out;
395 }
396 if (sctp_ifap->ifn_p == NULL) {
397 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
398 goto out;
399 }
400 if (if_name) {
401 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
402 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
403 sctp_ifap->ifn_p->ifn_name, if_name);
404 goto out;
405 }
406 } else {
407 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
408 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
409 sctp_ifap->ifn_p->ifn_index, ifn_index);
410 goto out;
411 }
412 }
413
414 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
415 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
416 out:
417 SCTP_IPI_ADDR_RUNLOCK();
418 }
419
420
421 void
422 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
423 const char *if_name, uint32_t ifn_index)
424 {
425 struct sctp_vrf *vrf;
426 struct sctp_ifa *sctp_ifap;
427
428 SCTP_IPI_ADDR_RLOCK();
429 vrf = sctp_find_vrf(vrf_id);
430 if (vrf == NULL) {
431 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
432 goto out;
433
434 }
435 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
436 if (sctp_ifap == NULL) {
437 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
438 goto out;
439 }
440 if (sctp_ifap->ifn_p == NULL) {
441 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
442 goto out;
443 }
444 if (if_name) {
445 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
446 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
447 sctp_ifap->ifn_p->ifn_name, if_name);
448 goto out;
449 }
450 } else {
451 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
452 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
453 sctp_ifap->ifn_p->ifn_index, ifn_index);
454 goto out;
455 }
456 }
457
458 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
459 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
460 out:
461 SCTP_IPI_ADDR_RUNLOCK();
462 }
463
464
465 /*-
466 * Add an ifa to an ifn.
467 * Register the interface as necessary.
468 * NOTE: ADDR write lock MUST be held.
469 */
470 static void
471 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
472 {
473 int ifa_af;
474
475 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
476 sctp_ifap->ifn_p = sctp_ifnp;
477 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
478 /* update address counts */
479 sctp_ifnp->ifa_count++;
480 ifa_af = sctp_ifap->address.sa.sa_family;
481 switch (ifa_af) {
482 #ifdef INET
483 case AF_INET:
484 sctp_ifnp->num_v4++;
485 break;
486 #endif
487 #ifdef INET6
488 case AF_INET6:
489 sctp_ifnp->num_v6++;
490 break;
491 #endif
492 default:
493 break;
494 }
495 if (sctp_ifnp->ifa_count == 1) {
496 /* register the new interface */
497 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
498 sctp_ifnp->registered_af = ifa_af;
499 }
500 }
501
502
503 /*-
504 * Remove an ifa from its ifn.
505 * If no more addresses exist, remove the ifn too. Otherwise, re-register
506 * the interface based on the remaining address families left.
507 * NOTE: ADDR write lock MUST be held.
508 */
509 static void
510 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
511 {
512 LIST_REMOVE(sctp_ifap, next_ifa);
513 if (sctp_ifap->ifn_p) {
514 /* update address counts */
515 sctp_ifap->ifn_p->ifa_count--;
516 switch (sctp_ifap->address.sa.sa_family) {
517 #ifdef INET
518 case AF_INET:
519 sctp_ifap->ifn_p->num_v4--;
520 break;
521 #endif
522 #ifdef INET6
523 case AF_INET6:
524 sctp_ifap->ifn_p->num_v6--;
525 break;
526 #endif
527 default:
528 break;
529 }
530
531 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
532 /* remove the ifn, possibly freeing it */
533 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
534 } else {
535 /* re-register address family type, if needed */
536 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
537 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
538 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
539 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
540 sctp_ifap->ifn_p->registered_af = AF_INET;
541 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
542 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
543 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
544 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
545 sctp_ifap->ifn_p->registered_af = AF_INET6;
546 }
547 /* free the ifn refcount */
548 sctp_free_ifn(sctp_ifap->ifn_p);
549 }
550 sctp_ifap->ifn_p = NULL;
551 }
552 }
553
554
555 struct sctp_ifa *
556 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
557 uint32_t ifn_type, const char *if_name, void *ifa,
558 struct sockaddr *addr, uint32_t ifa_flags,
559 int dynamic_add)
560 {
561 struct sctp_vrf *vrf;
562 struct sctp_ifn *sctp_ifnp = NULL;
563 struct sctp_ifa *sctp_ifap = NULL;
564 struct sctp_ifalist *hash_addr_head;
565 struct sctp_ifnlist *hash_ifn_head;
566 uint32_t hash_of_addr;
567 int new_ifn_af = 0;
568
569 #ifdef SCTP_DEBUG
570 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
571 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
572 #endif
573 SCTP_IPI_ADDR_WLOCK();
574 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
575 if (sctp_ifnp) {
576 vrf = sctp_ifnp->vrf;
577 } else {
578 vrf = sctp_find_vrf(vrf_id);
579 if (vrf == NULL) {
580 vrf = sctp_allocate_vrf(vrf_id);
581 if (vrf == NULL) {
582 SCTP_IPI_ADDR_WUNLOCK();
583 return (NULL);
584 }
585 }
586 }
587 if (sctp_ifnp == NULL) {
588 /* build one and add it, can't hold lock
589 * until after malloc done though.
590 */
591 SCTP_IPI_ADDR_WUNLOCK();
592 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
593 sizeof(struct sctp_ifn), SCTP_M_IFN);
594 if (sctp_ifnp == NULL) {
595 #ifdef INVARIANTS
596 panic("No memory for IFN");
597 #endif
598 return (NULL);
599 }
600 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
601 sctp_ifnp->ifn_index = ifn_index;
602 sctp_ifnp->ifn_p = ifn;
603 sctp_ifnp->ifn_type = ifn_type;
604 sctp_ifnp->refcount = 0;
605 sctp_ifnp->vrf = vrf;
606 atomic_add_int(&vrf->refcount, 1);
607 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
608 if (if_name != NULL) {
609 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
610 } else {
611 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
612 }
613 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
614 LIST_INIT(&sctp_ifnp->ifalist);
615 SCTP_IPI_ADDR_WLOCK();
616 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
617 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
618 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
619 new_ifn_af = 1;
620 }
621 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
622 if (sctp_ifap) {
623 /* Hmm, it already exists? */
624 if ((sctp_ifap->ifn_p) &&
625 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
626 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
627 sctp_ifap->ifn_p->ifn_name, ifn_index,
628 (void *)sctp_ifap);
629 if (new_ifn_af) {
630 /* Remove the created one that we don't want */
631 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
632 }
633 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
634 /* easy to solve, just switch back to active */
635 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
636 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
637 sctp_ifap->ifn_p = sctp_ifnp;
638 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
639 }
640 exit_stage_left:
641 SCTP_IPI_ADDR_WUNLOCK();
642 return (sctp_ifap);
643 } else {
644 if (sctp_ifap->ifn_p) {
645 /*
646 * The last IFN gets the address, remove the
647 * old one
648 */
649 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
650 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
651 sctp_ifap->ifn_p->ifn_index, if_name,
652 ifn_index);
653 /* remove the address from the old ifn */
654 sctp_remove_ifa_from_ifn(sctp_ifap);
655 /* move the address over to the new ifn */
656 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
657 goto exit_stage_left;
658 } else {
659 /* repair ifnp which was NULL ? */
660 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
661 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
662 (void *)sctp_ifnp, (void *)sctp_ifap);
663 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
664 }
665 goto exit_stage_left;
666 }
667 }
668 SCTP_IPI_ADDR_WUNLOCK();
669 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
670 if (sctp_ifap == NULL) {
671 #ifdef INVARIANTS
672 panic("No memory for IFA");
673 #endif
674 return (NULL);
675 }
676 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
677 sctp_ifap->ifn_p = sctp_ifnp;
678 atomic_add_int(&sctp_ifnp->refcount, 1);
679 sctp_ifap->vrf_id = vrf_id;
680 sctp_ifap->ifa = ifa;
681 #ifdef HAVE_SA_LEN
682 memcpy(&sctp_ifap->address, addr, addr->sa_len);
683 #else
684 switch (addr->sa_family) {
685 #ifdef INET
686 case AF_INET:
687 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in));
688 break;
689 #endif
690 #ifdef INET6
691 case AF_INET6:
692 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in6));
693 break;
694 #endif
695 #if defined(__Userspace__)
696 case AF_CONN:
697 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_conn));
698 break;
699 #endif
700 default:
701 /* TSNH */
702 break;
703 }
704 #endif
705 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
706 sctp_ifap->flags = ifa_flags;
707 /* Set scope */
708 switch (sctp_ifap->address.sa.sa_family) {
709 #ifdef INET
710 case AF_INET:
711 {
712 struct sockaddr_in *sin;
713
714 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
715 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
716 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
717 sctp_ifap->src_is_loop = 1;
718 }
719 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
720 sctp_ifap->src_is_priv = 1;
721 }
722 sctp_ifnp->num_v4++;
723 if (new_ifn_af)
724 new_ifn_af = AF_INET;
725 break;
726 }
727 #endif
728 #ifdef INET6
729 case AF_INET6:
730 {
731 /* ok to use deprecated addresses? */
732 struct sockaddr_in6 *sin6;
733
734 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
735 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
736 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
737 sctp_ifap->src_is_loop = 1;
738 }
739 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
740 sctp_ifap->src_is_priv = 1;
741 }
742 sctp_ifnp->num_v6++;
743 if (new_ifn_af)
744 new_ifn_af = AF_INET6;
745 break;
746 }
747 #endif
748 #if defined(__Userspace__)
749 case AF_CONN:
750 if (new_ifn_af)
751 new_ifn_af = AF_CONN;
752 break;
753 #endif
754 default:
755 new_ifn_af = 0;
756 break;
757 }
758 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
759
760 if ((sctp_ifap->src_is_priv == 0) &&
761 (sctp_ifap->src_is_loop == 0)) {
762 sctp_ifap->src_is_glob = 1;
763 }
764 SCTP_IPI_ADDR_WLOCK();
765 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
766 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
767 sctp_ifap->refcount = 1;
768 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
769 sctp_ifnp->ifa_count++;
770 vrf->total_ifa_count++;
771 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
772 if (new_ifn_af) {
773 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
774 sctp_ifnp->registered_af = new_ifn_af;
775 }
776 SCTP_IPI_ADDR_WUNLOCK();
777 if (dynamic_add) {
778 /* Bump up the refcount so that when the timer
779 * completes it will drop back down.
780 */
781 struct sctp_laddr *wi;
782
783 atomic_add_int(&sctp_ifap->refcount, 1);
784 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
785 if (wi == NULL) {
786 /*
787 * Gak, what can we do? We have lost an address
788 * change can you say HOSED?
789 */
790 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
791 /* Opps, must decrement the count */
792 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
793 if_name);
794 return (NULL);
795 }
796 SCTP_INCR_LADDR_COUNT();
797 bzero(wi, sizeof(*wi));
798 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
799 wi->ifa = sctp_ifap;
800 wi->action = SCTP_ADD_IP_ADDRESS;
801
802 SCTP_WQ_ADDR_LOCK();
803 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
804 SCTP_WQ_ADDR_UNLOCK();
805
806 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
807 (struct sctp_inpcb *)NULL,
808 (struct sctp_tcb *)NULL,
809 (struct sctp_nets *)NULL);
810 } else {
811 /* it's ready for use */
812 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
813 }
814 return (sctp_ifap);
815 }
816
817 void
818 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
819 uint32_t ifn_index, const char *if_name)
820 {
821 struct sctp_vrf *vrf;
822 struct sctp_ifa *sctp_ifap = NULL;
823
824 SCTP_IPI_ADDR_WLOCK();
825 vrf = sctp_find_vrf(vrf_id);
826 if (vrf == NULL) {
827 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
828 goto out_now;
829 }
830
831 #ifdef SCTP_DEBUG
832 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
833 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
834 #endif
835 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
836 if (sctp_ifap) {
837 /* Validate the delete */
838 if (sctp_ifap->ifn_p) {
839 int valid = 0;
840 /*-
841 * The name has priority over the ifn_index
842 * if its given. We do this especially for
843 * panda who might recycle indexes fast.
844 */
845 if (if_name) {
846 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
847 /* They match its a correct delete */
848 valid = 1;
849 }
850 }
851 if (!valid) {
852 /* last ditch check ifn_index */
853 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
854 valid = 1;
855 }
856 }
857 if (!valid) {
858 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
859 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
860 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
861 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
862 SCTP_IPI_ADDR_WUNLOCK();
863 return;
864 }
865 }
866 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
867 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
868 /*
869 * We don't set the flag. This means that the structure will
870 * hang around in EP's that have bound specific to it until
871 * they close. This gives us TCP like behavior if someone
872 * removes an address (or for that matter adds it right back).
873 */
874 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
875 vrf->total_ifa_count--;
876 LIST_REMOVE(sctp_ifap, next_bucket);
877 sctp_remove_ifa_from_ifn(sctp_ifap);
878 }
879 #ifdef SCTP_DEBUG
880 else {
881 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
882 ifn_index);
883 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
884 }
885 #endif
886
887 out_now:
888 SCTP_IPI_ADDR_WUNLOCK();
889 if (sctp_ifap) {
890 struct sctp_laddr *wi;
891
892 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
893 if (wi == NULL) {
894 /*
895 * Gak, what can we do? We have lost an address
896 * change can you say HOSED?
897 */
898 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
899
900 /* Oops, must decrement the count */
901 sctp_free_ifa(sctp_ifap);
902 return;
903 }
904 SCTP_INCR_LADDR_COUNT();
905 bzero(wi, sizeof(*wi));
906 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
907 wi->ifa = sctp_ifap;
908 wi->action = SCTP_DEL_IP_ADDRESS;
909 SCTP_WQ_ADDR_LOCK();
910 /*
911 * Should this really be a tailq? As it is we will process the
912 * newest first :-0
913 */
914 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
915 SCTP_WQ_ADDR_UNLOCK();
916
917 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
918 (struct sctp_inpcb *)NULL,
919 (struct sctp_tcb *)NULL,
920 (struct sctp_nets *)NULL);
921 }
922 return;
923 }
924
925
926 static int
927 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
928 {
929 int loopback_scope;
930 #if defined(INET)
931 int ipv4_local_scope, ipv4_addr_legal;
932 #endif
933 #if defined(INET6)
934 int local_scope, site_scope, ipv6_addr_legal;
935 #endif
936 #if defined(__Userspace__)
937 int conn_addr_legal;
938 #endif
939 struct sctp_vrf *vrf;
940 struct sctp_ifn *sctp_ifn;
941 struct sctp_ifa *sctp_ifa;
942
943 loopback_scope = stcb->asoc.scope.loopback_scope;
944 #if defined(INET)
945 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
946 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
947 #endif
948 #if defined(INET6)
949 local_scope = stcb->asoc.scope.local_scope;
950 site_scope = stcb->asoc.scope.site_scope;
951 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
952 #endif
953 #if defined(__Userspace__)
954 conn_addr_legal = stcb->asoc.scope.conn_addr_legal;
955 #endif
956
957 SCTP_IPI_ADDR_RLOCK();
958 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
959 if (vrf == NULL) {
960 /* no vrf, no addresses */
961 SCTP_IPI_ADDR_RUNLOCK();
962 return (0);
963 }
964
965 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
966 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
967 if ((loopback_scope == 0) &&
968 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
969 continue;
970 }
971 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
972 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
973 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
974 /* We allow pending addresses, where we
975 * have sent an asconf-add to be considered
976 * valid.
977 */
978 continue;
979 }
980 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
981 continue;
982 }
983 switch (sctp_ifa->address.sa.sa_family) {
984 #ifdef INET
985 case AF_INET:
986 if (ipv4_addr_legal) {
987 struct sockaddr_in *sin, *rsin;
988
989 sin = &sctp_ifa->address.sin;
990 rsin = (struct sockaddr_in *)to;
991 if ((ipv4_local_scope == 0) &&
992 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
993 continue;
994 }
995 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
996 SCTP_IPI_ADDR_RUNLOCK();
997 return (1);
998 }
999 }
1000 break;
1001 #endif
1002 #ifdef INET6
1003 case AF_INET6:
1004 if (ipv6_addr_legal) {
1005 struct sockaddr_in6 *sin6, *rsin6;
1006 #if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME)
1007 struct sockaddr_in6 lsa6;
1008 #endif
1009 sin6 = &sctp_ifa->address.sin6;
1010 rsin6 = (struct sockaddr_in6 *)to;
1011 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1012 if (local_scope == 0)
1013 continue;
1014 #if defined(SCTP_EMBEDDED_V6_SCOPE)
1015 if (sin6->sin6_scope_id == 0) {
1016 #ifdef SCTP_KAME
1017 if (sa6_recoverscope(sin6) != 0)
1018 continue;
1019 #else
1020 lsa6 = *sin6;
1021 if (in6_recoverscope(&lsa6,
1022 &lsa6.sin6_addr,
1023 NULL))
1024 continue;
1025 sin6 = &lsa6;
1026 #endif /* SCTP_KAME */
1027 }
1028 #endif /* SCTP_EMBEDDED_V6_SCOPE */
1029 }
1030 if ((site_scope == 0) &&
1031 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1032 continue;
1033 }
1034 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1035 SCTP_IPI_ADDR_RUNLOCK();
1036 return (1);
1037 }
1038 }
1039 break;
1040 #endif
1041 #if defined(__Userspace__)
1042 case AF_CONN:
1043 if (conn_addr_legal) {
1044 struct sockaddr_conn *sconn, *rsconn;
1045
1046 sconn = &sctp_ifa->address.sconn;
1047 rsconn = (struct sockaddr_conn *)to;
1048 if (sconn->sconn_addr == rsconn->sconn_addr) {
1049 SCTP_IPI_ADDR_RUNLOCK();
1050 return (1);
1051 }
1052 }
1053 break;
1054 #endif
1055 default:
1056 /* TSNH */
1057 break;
1058 }
1059 }
1060 }
1061 } else {
1062 struct sctp_laddr *laddr;
1063
1064 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1065 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1066 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1067 continue;
1068 }
1069 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1070 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1071 /* We allow pending addresses, where we
1072 * have sent an asconf-add to be considered
1073 * valid.
1074 */
1075 continue;
1076 }
1077 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1078 continue;
1079 }
1080 switch (to->sa_family) {
1081 #ifdef INET
1082 case AF_INET:
1083 {
1084 struct sockaddr_in *sin, *rsin;
1085
1086 sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1087 rsin = (struct sockaddr_in *)to;
1088 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1089 SCTP_IPI_ADDR_RUNLOCK();
1090 return (1);
1091 }
1092 break;
1093 }
1094 #endif
1095 #ifdef INET6
1096 case AF_INET6:
1097 {
1098 struct sockaddr_in6 *sin6, *rsin6;
1099
1100 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1101 rsin6 = (struct sockaddr_in6 *)to;
1102 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1103 SCTP_IPI_ADDR_RUNLOCK();
1104 return (1);
1105 }
1106 break;
1107 }
1108
1109 #endif
1110 #if defined(__Userspace__)
1111 case AF_CONN:
1112 {
1113 struct sockaddr_conn *sconn, *rsconn;
1114
1115 sconn = (struct sockaddr_conn *)&laddr->ifa->address.sconn;
1116 rsconn = (struct sockaddr_conn *)to;
1117 if (sconn->sconn_addr == rsconn->sconn_addr) {
1118 SCTP_IPI_ADDR_RUNLOCK();
1119 return (1);
1120 }
1121 break;
1122 }
1123 #endif
1124 default:
1125 /* TSNH */
1126 break;
1127 }
1128
1129 }
1130 }
1131 SCTP_IPI_ADDR_RUNLOCK();
1132 return (0);
1133 }
1134
1135
1136 static struct sctp_tcb *
1137 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1138 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1139 {
1140 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1141 /*
1142 * If we support the TCP model, then we must now dig through to see
1143 * if we can find our endpoint in the list of tcp ep's.
1144 */
1145 uint16_t lport, rport;
1146 struct sctppcbhead *ephead;
1147 struct sctp_inpcb *inp;
1148 struct sctp_laddr *laddr;
1149 struct sctp_tcb *stcb;
1150 struct sctp_nets *net;
1151 #ifdef SCTP_MVRF
1152 int fnd, i;
1153 #endif
1154
1155 if ((to == NULL) || (from == NULL)) {
1156 return (NULL);
1157 }
1158
1159 switch (to->sa_family) {
1160 #ifdef INET
1161 case AF_INET:
1162 if (from->sa_family == AF_INET) {
1163 lport = ((struct sockaddr_in *)to)->sin_port;
1164 rport = ((struct sockaddr_in *)from)->sin_port;
1165 } else {
1166 return (NULL);
1167 }
1168 break;
1169 #endif
1170 #ifdef INET6
1171 case AF_INET6:
1172 if (from->sa_family == AF_INET6) {
1173 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1174 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1175 } else {
1176 return (NULL);
1177 }
1178 break;
1179 #endif
1180 #if defined(__Userspace__)
1181 case AF_CONN:
1182 if (from->sa_family == AF_CONN) {
1183 lport = ((struct sockaddr_conn *)to)->sconn_port;
1184 rport = ((struct sockaddr_conn *)from)->sconn_port;
1185 } else {
1186 return (NULL);
1187 }
1188 break;
1189 #endif
1190 default:
1191 return (NULL);
1192 }
1193 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1194 /*
1195 * Ok now for each of the guys in this bucket we must look and see:
1196 * - Does the remote port match. - Does there single association's
1197 * addresses match this address (to). If so we update p_ep to point
1198 * to this ep and return the tcb from it.
1199 */
1200 LIST_FOREACH(inp, ephead, sctp_hash) {
1201 SCTP_INP_RLOCK(inp);
1202 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1203 SCTP_INP_RUNLOCK(inp);
1204 continue;
1205 }
1206 if (lport != inp->sctp_lport) {
1207 SCTP_INP_RUNLOCK(inp);
1208 continue;
1209 }
1210 #ifdef SCTP_MVRF
1211 fnd = 0;
1212 for (i = 0; i < inp->num_vrfs; i++) {
1213 if (inp->m_vrf_ids[i] == vrf_id) {
1214 fnd = 1;
1215 break;
1216 }
1217 }
1218 if (fnd == 0) {
1219 SCTP_INP_RUNLOCK(inp);
1220 continue;
1221 }
1222 #else
1223 if (inp->def_vrf_id != vrf_id) {
1224 SCTP_INP_RUNLOCK(inp);
1225 continue;
1226 }
1227 #endif
1228 /* check to see if the ep has one of the addresses */
1229 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1230 /* We are NOT bound all, so look further */
1231 int match = 0;
1232
1233 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1234
1235 if (laddr->ifa == NULL) {
1236 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1237 continue;
1238 }
1239 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1240 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1241 continue;
1242 }
1243 if (laddr->ifa->address.sa.sa_family ==
1244 to->sa_family) {
1245 /* see if it matches */
1246 #ifdef INET
1247 if (from->sa_family == AF_INET) {
1248 struct sockaddr_in *intf_addr, *sin;
1249
1250 intf_addr = &laddr->ifa->address.sin;
1251 sin = (struct sockaddr_in *)to;
1252 if (sin->sin_addr.s_addr ==
1253 intf_addr->sin_addr.s_addr) {
1254 match = 1;
1255 break;
1256 }
1257 }
1258 #endif
1259 #ifdef INET6
1260 if (from->sa_family == AF_INET6) {
1261 struct sockaddr_in6 *intf_addr6;
1262 struct sockaddr_in6 *sin6;
1263
1264 sin6 = (struct sockaddr_in6 *)
1265 to;
1266 intf_addr6 = &laddr->ifa->address.sin6;
1267
1268 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1269 intf_addr6)) {
1270 match = 1;
1271 break;
1272 }
1273 }
1274 #endif
1275 #if defined(__Userspace__)
1276 if (from->sa_family == AF_CONN) {
1277 struct sockaddr_conn *intf_addr, *sconn;
1278
1279 intf_addr = &laddr->ifa->address.sconn;
1280 sconn = (struct sockaddr_conn *)to;
1281 if (sconn->sconn_addr ==
1282 intf_addr->sconn_addr) {
1283 match = 1;
1284 break;
1285 }
1286 }
1287 #endif
1288 }
1289 }
1290 if (match == 0) {
1291 /* This endpoint does not have this address */
1292 SCTP_INP_RUNLOCK(inp);
1293 continue;
1294 }
1295 }
1296 /*
1297 * Ok if we hit here the ep has the address, does it hold
1298 * the tcb?
1299 */
1300 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1301 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1302 if (stcb == NULL) {
1303 SCTP_INP_RUNLOCK(inp);
1304 continue;
1305 }
1306 SCTP_TCB_LOCK(stcb);
1307 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1308 SCTP_TCB_UNLOCK(stcb);
1309 SCTP_INP_RUNLOCK(inp);
1310 continue;
1311 }
1312 if (stcb->rport != rport) {
1313 /* remote port does not match. */
1314 SCTP_TCB_UNLOCK(stcb);
1315 SCTP_INP_RUNLOCK(inp);
1316 continue;
1317 }
1318 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1319 SCTP_TCB_UNLOCK(stcb);
1320 SCTP_INP_RUNLOCK(inp);
1321 continue;
1322 }
1323 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1324 SCTP_TCB_UNLOCK(stcb);
1325 SCTP_INP_RUNLOCK(inp);
1326 continue;
1327 }
1328 /* Does this TCB have a matching address? */
1329 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1330
1331 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1332 /* not the same family, can't be a match */
1333 continue;
1334 }
1335 switch (from->sa_family) {
1336 #ifdef INET
1337 case AF_INET:
1338 {
1339 struct sockaddr_in *sin, *rsin;
1340
1341 sin = (struct sockaddr_in *)&net->ro._l_addr;
1342 rsin = (struct sockaddr_in *)from;
1343 if (sin->sin_addr.s_addr ==
1344 rsin->sin_addr.s_addr) {
1345 /* found it */
1346 if (netp != NULL) {
1347 *netp = net;
1348 }
1349 /* Update the endpoint pointer */
1350 *inp_p = inp;
1351 SCTP_INP_RUNLOCK(inp);
1352 return (stcb);
1353 }
1354 break;
1355 }
1356 #endif
1357 #ifdef INET6
1358 case AF_INET6:
1359 {
1360 struct sockaddr_in6 *sin6, *rsin6;
1361
1362 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1363 rsin6 = (struct sockaddr_in6 *)from;
1364 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1365 rsin6)) {
1366 /* found it */
1367 if (netp != NULL) {
1368 *netp = net;
1369 }
1370 /* Update the endpoint pointer */
1371 *inp_p = inp;
1372 SCTP_INP_RUNLOCK(inp);
1373 return (stcb);
1374 }
1375 break;
1376 }
1377 #endif
1378 #if defined(__Userspace__)
1379 case AF_CONN:
1380 {
1381 struct sockaddr_conn *sconn, *rsconn;
1382
1383 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1384 rsconn = (struct sockaddr_conn *)from;
1385 if (sconn->sconn_addr == rsconn->sconn_addr) {
1386 /* found it */
1387 if (netp != NULL) {
1388 *netp = net;
1389 }
1390 /* Update the endpoint pointer */
1391 *inp_p = inp;
1392 SCTP_INP_RUNLOCK(inp);
1393 return (stcb);
1394 }
1395 break;
1396 }
1397 #endif
1398 default:
1399 /* TSNH */
1400 break;
1401 }
1402 }
1403 SCTP_TCB_UNLOCK(stcb);
1404 SCTP_INP_RUNLOCK(inp);
1405 }
1406 return (NULL);
1407 }
1408
1409
1410 /*
1411 * rules for use
1412 *
1413 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1414 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1415 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1416 * NULL.
1417 */
1418
1419 struct sctp_tcb *
1420 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1421 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1422 {
1423 struct sctpasochead *head;
1424 struct sctp_inpcb *inp;
1425 struct sctp_tcb *stcb = NULL;
1426 struct sctp_nets *net;
1427 uint16_t rport;
1428
1429 inp = *inp_p;
1430 switch (remote->sa_family) {
1431 #ifdef INET
1432 case AF_INET:
1433 rport = (((struct sockaddr_in *)remote)->sin_port);
1434 break;
1435 #endif
1436 #ifdef INET6
1437 case AF_INET6:
1438 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1439 break;
1440 #endif
1441 #if defined(__Userspace__)
1442 case AF_CONN:
1443 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1444 break;
1445 #endif
1446 default:
1447 return (NULL);
1448 }
1449 if (locked_tcb) {
1450 /*
1451 * UN-lock so we can do proper locking here this occurs when
1452 * called from load_addresses_from_init.
1453 */
1454 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1455 SCTP_TCB_UNLOCK(locked_tcb);
1456 }
1457 SCTP_INP_INFO_RLOCK();
1458 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1459 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1460 /*-
1461 * Now either this guy is our listener or it's the
1462 * connector. If it is the one that issued the connect, then
1463 * it's only chance is to be the first TCB in the list. If
1464 * it is the acceptor, then do the special_lookup to hash
1465 * and find the real inp.
1466 */
1467 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1468 /* to is peer addr, from is my addr */
1469 #ifndef SCTP_MVRF
1470 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1471 netp, inp->def_vrf_id);
1472 if ((stcb != NULL) && (locked_tcb == NULL)) {
1473 /* we have a locked tcb, lower refcount */
1474 SCTP_INP_DECR_REF(inp);
1475 }
1476 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1477 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1478 SCTP_TCB_LOCK(locked_tcb);
1479 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1480 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1481 }
1482 #else
1483 /*-
1484 * MVRF is tricky, we must look in every VRF
1485 * the endpoint has.
1486 */
1487 int i;
1488
1489 for (i = 0; i < inp->num_vrfs; i++) {
1490 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1491 netp, inp->m_vrf_ids[i]);
1492 if ((stcb != NULL) && (locked_tcb == NULL)) {
1493 /* we have a locked tcb, lower refcount */
1494 SCTP_INP_DECR_REF(inp);
1495 break;
1496 }
1497 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1498 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1499 SCTP_TCB_LOCK(locked_tcb);
1500 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1501 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1502 break;
1503 }
1504 }
1505 #endif
1506 SCTP_INP_INFO_RUNLOCK();
1507 return (stcb);
1508 } else {
1509 SCTP_INP_WLOCK(inp);
1510 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1511 goto null_return;
1512 }
1513 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1514 if (stcb == NULL) {
1515 goto null_return;
1516 }
1517 SCTP_TCB_LOCK(stcb);
1518
1519 if (stcb->rport != rport) {
1520 /* remote port does not match. */
1521 SCTP_TCB_UNLOCK(stcb);
1522 goto null_return;
1523 }
1524 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1525 SCTP_TCB_UNLOCK(stcb);
1526 goto null_return;
1527 }
1528 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1529 SCTP_TCB_UNLOCK(stcb);
1530 goto null_return;
1531 }
1532 /* now look at the list of remote addresses */
1533 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1534 #ifdef INVARIANTS
1535 if (net == (TAILQ_NEXT(net, sctp_next))) {
1536 panic("Corrupt net list");
1537 }
1538 #endif
1539 if (net->ro._l_addr.sa.sa_family !=
1540 remote->sa_family) {
1541 /* not the same family */
1542 continue;
1543 }
1544 switch (remote->sa_family) {
1545 #ifdef INET
1546 case AF_INET:
1547 {
1548 struct sockaddr_in *sin, *rsin;
1549
1550 sin = (struct sockaddr_in *)
1551 &net->ro._l_addr;
1552 rsin = (struct sockaddr_in *)remote;
1553 if (sin->sin_addr.s_addr ==
1554 rsin->sin_addr.s_addr) {
1555 /* found it */
1556 if (netp != NULL) {
1557 *netp = net;
1558 }
1559 if (locked_tcb == NULL) {
1560 SCTP_INP_DECR_REF(inp);
1561 } else if (locked_tcb != stcb) {
1562 SCTP_TCB_LOCK(locked_tcb);
1563 }
1564 if (locked_tcb) {
1565 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1566 }
1567
1568 SCTP_INP_WUNLOCK(inp);
1569 SCTP_INP_INFO_RUNLOCK();
1570 return (stcb);
1571 }
1572 break;
1573 }
1574 #endif
1575 #ifdef INET6
1576 case AF_INET6:
1577 {
1578 struct sockaddr_in6 *sin6, *rsin6;
1579
1580 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1581 rsin6 = (struct sockaddr_in6 *)remote;
1582 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1583 rsin6)) {
1584 /* found it */
1585 if (netp != NULL) {
1586 *netp = net;
1587 }
1588 if (locked_tcb == NULL) {
1589 SCTP_INP_DECR_REF(inp);
1590 } else if (locked_tcb != stcb) {
1591 SCTP_TCB_LOCK(locked_tcb);
1592 }
1593 if (locked_tcb) {
1594 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1595 }
1596 SCTP_INP_WUNLOCK(inp);
1597 SCTP_INP_INFO_RUNLOCK();
1598 return (stcb);
1599 }
1600 break;
1601 }
1602 #endif
1603 #if defined(__Userspace__)
1604 case AF_CONN:
1605 {
1606 struct sockaddr_conn *sconn, *rsconn;
1607
1608 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1609 rsconn = (struct sockaddr_conn *)remote;
1610 if (sconn->sconn_addr == rsconn->sconn_addr) {
1611 /* found it */
1612 if (netp != NULL) {
1613 *netp = net;
1614 }
1615 if (locked_tcb == NULL) {
1616 SCTP_INP_DECR_REF(inp);
1617 } else if (locked_tcb != stcb) {
1618 SCTP_TCB_LOCK(locked_tcb);
1619 }
1620 if (locked_tcb) {
1621 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1622 }
1623 SCTP_INP_WUNLOCK(inp);
1624 SCTP_INP_INFO_RUNLOCK();
1625 return (stcb);
1626 }
1627 break;
1628 }
1629 #endif
1630 default:
1631 /* TSNH */
1632 break;
1633 }
1634 }
1635 SCTP_TCB_UNLOCK(stcb);
1636 }
1637 } else {
1638 SCTP_INP_WLOCK(inp);
1639 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1640 goto null_return;
1641 }
1642 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1643 inp->sctp_hashmark)];
1644 if (head == NULL) {
1645 goto null_return;
1646 }
1647 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1648 if (stcb->rport != rport) {
1649 /* remote port does not match */
1650 continue;
1651 }
1652 SCTP_TCB_LOCK(stcb);
1653 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1654 SCTP_TCB_UNLOCK(stcb);
1655 continue;
1656 }
1657 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1658 SCTP_TCB_UNLOCK(stcb);
1659 continue;
1660 }
1661 /* now look at the list of remote addresses */
1662 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1663 #ifdef INVARIANTS
1664 if (net == (TAILQ_NEXT(net, sctp_next))) {
1665 panic("Corrupt net list");
1666 }
1667 #endif
1668 if (net->ro._l_addr.sa.sa_family !=
1669 remote->sa_family) {
1670 /* not the same family */
1671 continue;
1672 }
1673 switch (remote->sa_family) {
1674 #ifdef INET
1675 case AF_INET:
1676 {
1677 struct sockaddr_in *sin, *rsin;
1678
1679 sin = (struct sockaddr_in *)
1680 &net->ro._l_addr;
1681 rsin = (struct sockaddr_in *)remote;
1682 if (sin->sin_addr.s_addr ==
1683 rsin->sin_addr.s_addr) {
1684 /* found it */
1685 if (netp != NULL) {
1686 *netp = net;
1687 }
1688 if (locked_tcb == NULL) {
1689 SCTP_INP_DECR_REF(inp);
1690 } else if (locked_tcb != stcb) {
1691 SCTP_TCB_LOCK(locked_tcb);
1692 }
1693 if (locked_tcb) {
1694 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1695 }
1696 SCTP_INP_WUNLOCK(inp);
1697 SCTP_INP_INFO_RUNLOCK();
1698 return (stcb);
1699 }
1700 break;
1701 }
1702 #endif
1703 #ifdef INET6
1704 case AF_INET6:
1705 {
1706 struct sockaddr_in6 *sin6, *rsin6;
1707
1708 sin6 = (struct sockaddr_in6 *)
1709 &net->ro._l_addr;
1710 rsin6 = (struct sockaddr_in6 *)remote;
1711 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1712 rsin6)) {
1713 /* found it */
1714 if (netp != NULL) {
1715 *netp = net;
1716 }
1717 if (locked_tcb == NULL) {
1718 SCTP_INP_DECR_REF(inp);
1719 } else if (locked_tcb != stcb) {
1720 SCTP_TCB_LOCK(locked_tcb);
1721 }
1722 if (locked_tcb) {
1723 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1724 }
1725 SCTP_INP_WUNLOCK(inp);
1726 SCTP_INP_INFO_RUNLOCK();
1727 return (stcb);
1728 }
1729 break;
1730 }
1731 #endif
1732 #if defined(__Userspace__)
1733 case AF_CONN:
1734 {
1735 struct sockaddr_conn *sconn, *rsconn;
1736
1737 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1738 rsconn = (struct sockaddr_conn *)remote;
1739 if (sconn->sconn_addr == rsconn->sconn_addr) {
1740 /* found it */
1741 if (netp != NULL) {
1742 *netp = net;
1743 }
1744 if (locked_tcb == NULL) {
1745 SCTP_INP_DECR_REF(inp);
1746 } else if (locked_tcb != stcb) {
1747 SCTP_TCB_LOCK(locked_tcb);
1748 }
1749 if (locked_tcb) {
1750 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1751 }
1752 SCTP_INP_WUNLOCK(inp);
1753 SCTP_INP_INFO_RUNLOCK();
1754 return (stcb);
1755 }
1756 break;
1757 }
1758 #endif
1759 default:
1760 /* TSNH */
1761 break;
1762 }
1763 }
1764 SCTP_TCB_UNLOCK(stcb);
1765 }
1766 }
1767 null_return:
1768 /* clean up for returning null */
1769 if (locked_tcb) {
1770 SCTP_TCB_LOCK(locked_tcb);
1771 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1772 }
1773 SCTP_INP_WUNLOCK(inp);
1774 SCTP_INP_INFO_RUNLOCK();
1775 /* not found */
1776 return (NULL);
1777 }
1778
1779
1780 /*
1781 * Find an association for a specific endpoint using the association id given
1782 * out in the COMM_UP notification
1783 */
1784 struct sctp_tcb *
1785 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1786 {
1787 /*
1788 * Use my the assoc_id to find a endpoint
1789 */
1790 struct sctpasochead *head;
1791 struct sctp_tcb *stcb;
1792 uint32_t id;
1793
1794 if (inp == NULL) {
1795 SCTP_PRINTF("TSNH ep_associd\n");
1796 return (NULL);
1797 }
1798 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1799 SCTP_PRINTF("TSNH ep_associd0\n");
1800 return (NULL);
1801 }
1802 id = (uint32_t)asoc_id;
1803 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1804 if (head == NULL) {
1805 /* invalid id TSNH */
1806 SCTP_PRINTF("TSNH ep_associd1\n");
1807 return (NULL);
1808 }
1809 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1810 if (stcb->asoc.assoc_id == id) {
1811 if (inp != stcb->sctp_ep) {
1812 /*
1813 * some other guy has the same id active (id
1814 * collision ??).
1815 */
1816 SCTP_PRINTF("TSNH ep_associd2\n");
1817 continue;
1818 }
1819 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1820 continue;
1821 }
1822 if (want_lock) {
1823 SCTP_TCB_LOCK(stcb);
1824 }
1825 return (stcb);
1826 }
1827 }
1828 return (NULL);
1829 }
1830
1831
1832 struct sctp_tcb *
1833 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1834 {
1835 struct sctp_tcb *stcb;
1836
1837 SCTP_INP_RLOCK(inp);
1838 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1839 SCTP_INP_RUNLOCK(inp);
1840 return (stcb);
1841 }
1842
1843
1844 /*
1845 * Endpoint probe expects that the INP_INFO is locked.
1846 */
1847 static struct sctp_inpcb *
1848 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1849 uint16_t lport, uint32_t vrf_id)
1850 {
1851 struct sctp_inpcb *inp;
1852 struct sctp_laddr *laddr;
1853 #ifdef INET
1854 struct sockaddr_in *sin;
1855 #endif
1856 #ifdef INET6
1857 struct sockaddr_in6 *sin6;
1858 struct sockaddr_in6 *intf_addr6;
1859 #endif
1860 #if defined(__Userspace__)
1861 struct sockaddr_conn *sconn;
1862 #endif
1863 #ifdef SCTP_MVRF
1864 int i;
1865 #endif
1866 int fnd;
1867
1868 #ifdef INET
1869 sin = NULL;
1870 #endif
1871 #ifdef INET6
1872 sin6 = NULL;
1873 #endif
1874 #if defined(__Userspace__)
1875 sconn = NULL;
1876 #endif
1877 switch (nam->sa_family) {
1878 #ifdef INET
1879 case AF_INET:
1880 sin = (struct sockaddr_in *)nam;
1881 break;
1882 #endif
1883 #ifdef INET6
1884 case AF_INET6:
1885 sin6 = (struct sockaddr_in6 *)nam;
1886 break;
1887 #endif
1888 #if defined(__Userspace__)
1889 case AF_CONN:
1890 sconn = (struct sockaddr_conn *)nam;
1891 break;
1892 #endif
1893 default:
1894 /* unsupported family */
1895 return (NULL);
1896 }
1897
1898 if (head == NULL)
1899 return (NULL);
1900
1901 LIST_FOREACH(inp, head, sctp_hash) {
1902 SCTP_INP_RLOCK(inp);
1903 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1904 SCTP_INP_RUNLOCK(inp);
1905 continue;
1906 }
1907 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1908 (inp->sctp_lport == lport)) {
1909 /* got it */
1910 #ifdef INET
1911 if ((nam->sa_family == AF_INET) &&
1912 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1913 SCTP_IPV6_V6ONLY(inp)) {
1914 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1915 SCTP_INP_RUNLOCK(inp);
1916 continue;
1917 }
1918 #endif
1919 #ifdef INET6
1920 /* A V6 address and the endpoint is NOT bound V6 */
1921 if (nam->sa_family == AF_INET6 &&
1922 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1923 SCTP_INP_RUNLOCK(inp);
1924 continue;
1925 }
1926 #endif
1927 /* does a VRF id match? */
1928 fnd = 0;
1929 #ifdef SCTP_MVRF
1930 for (i = 0; i < inp->num_vrfs; i++) {
1931 if (inp->m_vrf_ids[i] == vrf_id) {
1932 fnd = 1;
1933 break;
1934 }
1935 }
1936 #else
1937 if (inp->def_vrf_id == vrf_id)
1938 fnd = 1;
1939 #endif
1940
1941 SCTP_INP_RUNLOCK(inp);
1942 if (!fnd)
1943 continue;
1944 return (inp);
1945 }
1946 SCTP_INP_RUNLOCK(inp);
1947 }
1948 switch (nam->sa_family) {
1949 #ifdef INET
1950 case AF_INET:
1951 if (sin->sin_addr.s_addr == INADDR_ANY) {
1952 /* Can't hunt for one that has no address specified */
1953 return (NULL);
1954 }
1955 break;
1956 #endif
1957 #ifdef INET6
1958 case AF_INET6:
1959 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1960 /* Can't hunt for one that has no address specified */
1961 return (NULL);
1962 }
1963 break;
1964 #endif
1965 #if defined(__Userspace__)
1966 case AF_CONN:
1967 if (sconn->sconn_addr == NULL) {
1968 return (NULL);
1969 }
1970 break;
1971 #endif
1972 default:
1973 break;
1974 }
1975 /*
1976 * ok, not bound to all so see if we can find a EP bound to this
1977 * address.
1978 */
1979 LIST_FOREACH(inp, head, sctp_hash) {
1980 SCTP_INP_RLOCK(inp);
1981 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1982 SCTP_INP_RUNLOCK(inp);
1983 continue;
1984 }
1985 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1986 SCTP_INP_RUNLOCK(inp);
1987 continue;
1988 }
1989 /*
1990 * Ok this could be a likely candidate, look at all of its
1991 * addresses
1992 */
1993 if (inp->sctp_lport != lport) {
1994 SCTP_INP_RUNLOCK(inp);
1995 continue;
1996 }
1997 /* does a VRF id match? */
1998 fnd = 0;
1999 #ifdef SCTP_MVRF
2000 for (i = 0; i < inp->num_vrfs; i++) {
2001 if (inp->m_vrf_ids[i] == vrf_id) {
2002 fnd = 1;
2003 break;
2004 }
2005 }
2006 #else
2007 if (inp->def_vrf_id == vrf_id)
2008 fnd = 1;
2009
2010 #endif
2011 if (!fnd) {
2012 SCTP_INP_RUNLOCK(inp);
2013 continue;
2014 }
2015 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2016 if (laddr->ifa == NULL) {
2017 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
2018 __FUNCTION__);
2019 continue;
2020 }
2021 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
2022 (void *)laddr->ifa);
2023 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2024 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
2025 continue;
2026 }
2027 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
2028 /* possible, see if it matches */
2029 switch (nam->sa_family) {
2030 #ifdef INET
2031 case AF_INET:
2032 #if defined(__APPLE__)
2033 if (sin == NULL) {
2034 /* TSNH */
2035 break;
2036 }
2037 #endif
2038 if (sin->sin_addr.s_addr ==
2039 laddr->ifa->address.sin.sin_addr.s_addr) {
2040 SCTP_INP_RUNLOCK(inp);
2041 return (inp);
2042 }
2043 break;
2044 #endif
2045 #ifdef INET6
2046 case AF_INET6:
2047 intf_addr6 = &laddr->ifa->address.sin6;
2048 if (SCTP6_ARE_ADDR_EQUAL(sin6,
2049 intf_addr6)) {
2050 SCTP_INP_RUNLOCK(inp);
2051 return (inp);
2052 }
2053 break;
2054 #endif
2055 #if defined(__Userspace__)
2056 case AF_CONN:
2057 if (sconn->sconn_addr == laddr->ifa->address.sconn.sconn_addr) {
2058 SCTP_INP_RUNLOCK(inp);
2059 return (inp);
2060 }
2061 break;
2062 #endif
2063 }
2064 }
2065 }
2066 SCTP_INP_RUNLOCK(inp);
2067 }
2068 return (NULL);
2069 }
2070
2071
2072 static struct sctp_inpcb *
2073 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2074 {
2075 struct sctppcbhead *head;
2076 struct sctp_inpcb *t_inp;
2077 #ifdef SCTP_MVRF
2078 int i;
2079 #endif
2080 int fnd;
2081
2082 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2083 SCTP_BASE_INFO(hashmark))];
2084 LIST_FOREACH(t_inp, head, sctp_hash) {
2085 if (t_inp->sctp_lport != lport) {
2086 continue;
2087 }
2088 /* is it in the VRF in question */
2089 fnd = 0;
2090 #ifdef SCTP_MVRF
2091 for (i = 0; i < inp->num_vrfs; i++) {
2092 if (t_inp->m_vrf_ids[i] == vrf_id) {
2093 fnd = 1;
2094 break;
2095 }
2096 }
2097 #else
2098 if (t_inp->def_vrf_id == vrf_id)
2099 fnd = 1;
2100 #endif
2101 if (!fnd)
2102 continue;
2103
2104 /* This one is in use. */
2105 /* check the v6/v4 binding issue */
2106 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2107 SCTP_IPV6_V6ONLY(t_inp)) {
2108 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2109 /* collision in V6 space */
2110 return (t_inp);
2111 } else {
2112 /* inp is BOUND_V4 no conflict */
2113 continue;
2114 }
2115 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2116 /* t_inp is bound v4 and v6, conflict always */
2117 return (t_inp);
2118 } else {
2119 /* t_inp is bound only V4 */
2120 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2121 SCTP_IPV6_V6ONLY(inp)) {
2122 /* no conflict */
2123 continue;
2124 }
2125 /* else fall through to conflict */
2126 }
2127 return (t_inp);
2128 }
2129 return (NULL);
2130 }
2131
2132
2133 int
2134 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
2135 {
2136 /* For 1-2-1 with port reuse */
2137 struct sctppcbhead *head;
2138 struct sctp_inpcb *tinp;
2139
2140 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
2141 /* only works with port reuse on */
2142 return (-1);
2143 }
2144 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
2145 return (0);
2146 }
2147 SCTP_INP_RUNLOCK(inp);
2148 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
2149 SCTP_BASE_INFO(hashmark))];
2150 /* Kick out all non-listeners to the TCP hash */
2151 LIST_FOREACH(tinp, head, sctp_hash) {
2152 if (tinp->sctp_lport != inp->sctp_lport) {
2153 continue;
2154 }
2155 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2156 continue;
2157 }
2158 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2159 continue;
2160 }
2161 if (tinp->sctp_socket->so_qlimit) {
2162 continue;
2163 }
2164 SCTP_INP_WLOCK(tinp);
2165 LIST_REMOVE(tinp, sctp_hash);
2166 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
2167 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
2168 LIST_INSERT_HEAD(head, tinp, sctp_hash);
2169 SCTP_INP_WUNLOCK(tinp);
2170 }
2171 SCTP_INP_WLOCK(inp);
2172 /* Pull from where he was */
2173 LIST_REMOVE(inp, sctp_hash);
2174 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
2175 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
2176 LIST_INSERT_HEAD(head, inp, sctp_hash);
2177 SCTP_INP_WUNLOCK(inp);
2178 SCTP_INP_RLOCK(inp);
2179 return (0);
2180 }
2181
2182
2183 struct sctp_inpcb *
2184 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
2185 uint32_t vrf_id)
2186 {
2187 /*
2188 * First we check the hash table to see if someone has this port
2189 * bound with just the port.
2190 */
2191 struct sctp_inpcb *inp;
2192 struct sctppcbhead *head;
2193 int lport;
2194 unsigned int i;
2195 #ifdef INET
2196 struct sockaddr_in *sin;
2197 #endif
2198 #ifdef INET6
2199 struct sockaddr_in6 *sin6;
2200 #endif
2201 #if defined(__Userspace__)
2202 struct sockaddr_conn *sconn;
2203 #endif
2204
2205 switch (nam->sa_family) {
2206 #ifdef INET
2207 case AF_INET:
2208 sin = (struct sockaddr_in *)nam;
2209 lport = sin->sin_port;
2210 break;
2211 #endif
2212 #ifdef INET6
2213 case AF_INET6:
2214 sin6 = (struct sockaddr_in6 *)nam;
2215 lport = sin6->sin6_port;
2216 break;
2217 #endif
2218 #if defined(__Userspace__)
2219 case AF_CONN:
2220 sconn = (struct sockaddr_conn *)nam;
2221 lport = sconn->sconn_port;
2222 break;
2223 #endif
2224 default:
2225 return (NULL);
2226 }
2227 /*
2228 * I could cheat here and just cast to one of the types but we will
2229 * do it right. It also provides the check against an Unsupported
2230 * type too.
2231 */
2232 /* Find the head of the ALLADDR chain */
2233 if (have_lock == 0) {
2234 SCTP_INP_INFO_RLOCK();
2235 }
2236 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2237 SCTP_BASE_INFO(hashmark))];
2238 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2239
2240 /*
2241 * If the TCP model exists it could be that the main listening
2242 * endpoint is gone but there still exists a connected socket for this
2243 * guy. If so we can return the first one that we find. This may NOT
2244 * be the correct one so the caller should be wary on the returned INP.
2245 * Currently the only caller that sets find_tcp_pool is in bindx where
2246 * we are verifying that a user CAN bind the address. He either
2247 * has bound it already, or someone else has, or its open to bind,
2248 * so this is good enough.
2249 */
2250 if (inp == NULL && find_tcp_pool) {
2251 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
2252 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
2253 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2254 if (inp) {
2255 break;
2256 }
2257 }
2258 }
2259 if (inp) {
2260 SCTP_INP_INCR_REF(inp);
2261 }
2262 if (have_lock == 0) {
2263 SCTP_INP_INFO_RUNLOCK();
2264 }
2265 return (inp);
2266 }
2267
2268
2269 /*
2270 * Find an association for an endpoint with the pointer to whom you want to
2271 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2272 * need to change the *to to some other struct like a mbuf...
2273 */
2274 struct sctp_tcb *
2275 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2276 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2277 uint32_t vrf_id)
2278 {
2279 struct sctp_inpcb *inp = NULL;
2280 struct sctp_tcb *stcb;
2281
2282 SCTP_INP_INFO_RLOCK();
2283 if (find_tcp_pool) {
2284 if (inp_p != NULL) {
2285 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2286 vrf_id);
2287 } else {
2288 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2289 vrf_id);
2290 }
2291 if (stcb != NULL) {
2292 SCTP_INP_INFO_RUNLOCK();
2293 return (stcb);
2294 }
2295 }
2296 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2297 if (inp_p != NULL) {
2298 *inp_p = inp;
2299 }
2300 SCTP_INP_INFO_RUNLOCK();
2301 if (inp == NULL) {
2302 return (NULL);
2303 }
2304 /*
2305 * ok, we have an endpoint, now lets find the assoc for it (if any)
2306 * we now place the source address or from in the to of the find
2307 * endpoint call. Since in reality this chain is used from the
2308 * inbound packet side.
2309 */
2310 if (inp_p != NULL) {
2311 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2312 NULL);
2313 } else {
2314 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2315 NULL);
2316 }
2317 return (stcb);
2318 }
2319
2320
2321 /*
2322 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2323 * find all addresses that the sender has specified in any address list. Each
2324 * address will be used to lookup the TCB and see if one exits.
2325 */
2326 static struct sctp_tcb *
2327 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2328 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2329 struct sockaddr *dst)
2330 {
2331 struct sctp_paramhdr *phdr, parm_buf;
2332 #if defined(INET) || defined(INET6)
2333 struct sctp_tcb *stcb;
2334 uint16_t ptype;
2335 #endif
2336 uint16_t plen;
2337 #ifdef INET
2338 struct sockaddr_in sin4;
2339 #endif
2340 #ifdef INET6
2341 struct sockaddr_in6 sin6;
2342 #endif
2343
2344 #ifdef INET
2345 memset(&sin4, 0, sizeof(sin4));
2346 #ifdef HAVE_SIN_LEN
2347 sin4.sin_len = sizeof(sin4);
2348 #endif
2349 sin4.sin_family = AF_INET;
2350 sin4.sin_port = sh->src_port;
2351 #endif
2352 #ifdef INET6
2353 memset(&sin6, 0, sizeof(sin6));
2354 #ifdef HAVE_SIN6_LEN
2355 sin6.sin6_len = sizeof(sin6);
2356 #endif
2357 sin6.sin6_family = AF_INET6;
2358 sin6.sin6_port = sh->src_port;
2359 #endif
2360
2361 offset += sizeof(struct sctp_init_chunk);
2362
2363 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2364 while (phdr != NULL) {
2365 /* now we must see if we want the parameter */
2366 #if defined(INET) || defined(INET6)
2367 ptype = ntohs(phdr->param_type);
2368 #endif
2369 plen = ntohs(phdr->param_length);
2370 if (plen == 0) {
2371 break;
2372 }
2373 #ifdef INET
2374 if (ptype == SCTP_IPV4_ADDRESS &&
2375 plen == sizeof(struct sctp_ipv4addr_param)) {
2376 /* Get the rest of the address */
2377 struct sctp_ipv4addr_param ip4_parm, *p4;
2378
2379 phdr = sctp_get_next_param(m, offset,
2380 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2381 if (phdr == NULL) {
2382 return (NULL);
2383 }
2384 p4 = (struct sctp_ipv4addr_param *)phdr;
2385 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2386 /* look it up */
2387 stcb = sctp_findassociation_ep_addr(inp_p,
2388 (struct sockaddr *)&sin4, netp, dst, NULL);
2389 if (stcb != NULL) {
2390 return (stcb);
2391 }
2392 }
2393 #endif
2394 #ifdef INET6
2395 if (ptype == SCTP_IPV6_ADDRESS &&
2396 plen == sizeof(struct sctp_ipv6addr_param)) {
2397 /* Get the rest of the address */
2398 struct sctp_ipv6addr_param ip6_parm, *p6;
2399
2400 phdr = sctp_get_next_param(m, offset,
2401 (struct sctp_paramhdr *)&ip6_parm, min(plen,sizeof(ip6_parm)));
2402 if (phdr == NULL) {
2403 return (NULL);
2404 }
2405 p6 = (struct sctp_ipv6addr_param *)phdr;
2406 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2407 /* look it up */
2408 stcb = sctp_findassociation_ep_addr(inp_p,
2409 (struct sockaddr *)&sin6, netp, dst, NULL);
2410 if (stcb != NULL) {
2411 return (stcb);
2412 }
2413 }
2414 #endif
2415 offset += SCTP_SIZE32(plen);
2416 phdr = sctp_get_next_param(m, offset, &parm_buf,
2417 sizeof(parm_buf));
2418 }
2419 return (NULL);
2420 }
2421
2422 static struct sctp_tcb *
2423 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2424 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2425 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2426 {
2427 /*
2428 * Use my vtag to hash. If we find it we then verify the source addr
2429 * is in the assoc. If all goes well we save a bit on rec of a
2430 * packet.
2431 */
2432 struct sctpasochead *head;
2433 struct sctp_nets *net;
2434 struct sctp_tcb *stcb;
2435 #ifdef SCTP_MVRF
2436 unsigned int i;
2437 #endif
2438
2439 SCTP_INP_INFO_RLOCK();
2440 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2441 SCTP_BASE_INFO(hashasocmark))];
2442 if (head == NULL) {
2443 /* invalid vtag */
2444 SCTP_INP_INFO_RUNLOCK();
2445 return (NULL);
2446 }
2447 LIST_FOREACH(stcb, head, sctp_asocs) {
2448 SCTP_INP_RLOCK(stcb->sctp_ep);
2449 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2450 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2451 continue;
2452 }
2453 #ifdef SCTP_MVRF
2454 for (i = 0; i < stcb->sctp_ep->num_vrfs; i++) {
2455 if (stcb->sctp_ep->m_vrf_ids[i] == vrf_id) {
2456 break;
2457 }
2458 }
2459 if (i == stcb->sctp_ep->num_vrfs) {
2460 SCTP_INP_RUNLOCK(inp);
2461 continue;
2462 }
2463 #else
2464 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2465 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2466 continue;
2467 }
2468 #endif
2469 SCTP_TCB_LOCK(stcb);
2470 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2471 if (stcb->asoc.my_vtag == vtag) {
2472 /* candidate */
2473 if (stcb->rport != rport) {
2474 SCTP_TCB_UNLOCK(stcb);
2475 continue;
2476 }
2477 if (stcb->sctp_ep->sctp_lport != lport) {
2478 SCTP_TCB_UNLOCK(stcb);
2479 continue;
2480 }
2481 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2482 SCTP_TCB_UNLOCK(stcb);
2483 continue;
2484 }
2485 /* RRS:Need toaddr check here */
2486 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2487 /* Endpoint does not own this address */
2488 SCTP_TCB_UNLOCK(stcb);
2489 continue;
2490 }
2491 if (remote_tag) {
2492 /* If we have both vtags that's all we match on */
2493 if (stcb->asoc.peer_vtag == remote_tag) {
2494 /* If both tags match we consider it conclusive
2495 * and check NO source/destination addresses
2496 */
2497 goto conclusive;
2498 }
2499 }
2500 if (skip_src_check) {
2501 conclusive:
2502 if (from) {
2503 *netp = sctp_findnet(stcb, from);
2504 } else {
2505 *netp = NULL; /* unknown */
2506 }
2507 if (inp_p)
2508 *inp_p = stcb->sctp_ep;
2509 SCTP_INP_INFO_RUNLOCK();
2510 return (stcb);
2511 }
2512 net = sctp_findnet(stcb, from);
2513 if (net) {
2514 /* yep its him. */
2515 *netp = net;
2516 SCTP_STAT_INCR(sctps_vtagexpress);
2517 *inp_p = stcb->sctp_ep;
2518 SCTP_INP_INFO_RUNLOCK();
2519 return (stcb);
2520 } else {
2521 /*
2522 * not him, this should only happen in rare
2523 * cases so I peg it.
2524 */
2525 SCTP_STAT_INCR(sctps_vtagbogus);
2526 }
2527 }
2528 SCTP_TCB_UNLOCK(stcb);
2529 }
2530 SCTP_INP_INFO_RUNLOCK();
2531 return (NULL);
2532 }
2533
2534
2535 /*
2536 * Find an association with the pointer to the inbound IP packet. This can be
2537 * a IPv4 or IPv6 packet.
2538 */
2539 struct sctp_tcb *
2540 sctp_findassociation_addr(struct mbuf *m, int offset,
2541 struct sockaddr *src, struct sockaddr *dst,
2542 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2543 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2544 {
2545 int find_tcp_pool;
2546 struct sctp_tcb *stcb;
2547 struct sctp_inpcb *inp;
2548
2549 if (sh->v_tag) {
2550 /* we only go down this path if vtag is non-zero */
2551 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2552 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2553 if (stcb) {
2554 return (stcb);
2555 }
2556 }
2557
2558 find_tcp_pool = 0;
2559 if ((ch->chunk_type != SCTP_INITIATION) &&
2560 (ch->chunk_type != SCTP_INITIATION_ACK) &&
2561 (ch->chunk_type != SCTP_COOKIE_ACK) &&
2562 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2563 /* Other chunk types go to the tcp pool. */
2564 find_tcp_pool = 1;
2565 }
2566 if (inp_p) {
2567 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2568 find_tcp_pool, vrf_id);
2569 inp = *inp_p;
2570 } else {
2571 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2572 find_tcp_pool, vrf_id);
2573 }
2574 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2575 if (stcb == NULL && inp) {
2576 /* Found a EP but not this address */
2577 if ((ch->chunk_type == SCTP_INITIATION) ||
2578 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2579 /*-
2580 * special hook, we do NOT return linp or an
2581 * association that is linked to an existing
2582 * association that is under the TCP pool (i.e. no
2583 * listener exists). The endpoint finding routine
2584 * will always find a listener before examining the
2585 * TCP pool.
2586 */
2587 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2588 if (inp_p) {
2589 *inp_p = NULL;
2590 }
2591 return (NULL);
2592 }
2593 stcb = sctp_findassociation_special_addr(m,
2594 offset, sh, &inp, netp, dst);
2595 if (inp_p != NULL) {
2596 *inp_p = inp;
2597 }
2598 }
2599 }
2600 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2601 return (stcb);
2602 }
2603
2604 /*
2605 * lookup an association by an ASCONF lookup address.
2606 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2607 */
2608 struct sctp_tcb *
2609 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2610 struct sockaddr *dst, struct sctphdr *sh,
2611 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2612 {
2613 struct sctp_tcb *stcb;
2614 struct sockaddr_storage remote_store;
2615 struct sctp_paramhdr parm_buf, *phdr;
2616 int ptype;
2617 int zero_address = 0;
2618 #ifdef INET
2619 struct sockaddr_in *sin;
2620 #endif
2621 #ifdef INET6
2622 struct sockaddr_in6 *sin6;
2623 #endif
2624
2625 memset(&remote_store, 0, sizeof(remote_store));
2626 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2627 &parm_buf, sizeof(struct sctp_paramhdr));
2628 if (phdr == NULL) {
2629 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2630 __FUNCTION__);
2631 return NULL;
2632 }
2633 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2634 /* get the correlation address */
2635 switch (ptype) {
2636 #ifdef INET6
2637 case SCTP_IPV6_ADDRESS:
2638 {
2639 /* ipv6 address param */
2640 struct sctp_ipv6addr_param *p6, p6_buf;
2641
2642 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2643 return NULL;
2644 }
2645 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2646 offset + sizeof(struct sctp_asconf_chunk),
2647 &p6_buf.ph, sizeof(*p6));
2648 if (p6 == NULL) {
2649 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2650 __FUNCTION__);
2651 return (NULL);
2652 }
2653 sin6 = (struct sockaddr_in6 *)&remote_store;
2654 sin6->sin6_family = AF_INET6;
2655 #ifdef HAVE_SIN6_LEN
2656 sin6->sin6_len = sizeof(*sin6);
2657 #endif
2658 sin6->sin6_port = sh->src_port;
2659 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2660 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2661 zero_address = 1;
2662 break;
2663 }
2664 #endif
2665 #ifdef INET
2666 case SCTP_IPV4_ADDRESS:
2667 {
2668 /* ipv4 address param */
2669 struct sctp_ipv4addr_param *p4, p4_buf;
2670
2671 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2672 return NULL;
2673 }
2674 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2675 offset + sizeof(struct sctp_asconf_chunk),
2676 &p4_buf.ph, sizeof(*p4));
2677 if (p4 == NULL) {
2678 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2679 __FUNCTION__);
2680 return (NULL);
2681 }
2682 sin = (struct sockaddr_in *)&remote_store;
2683 sin->sin_family = AF_INET;
2684 #ifdef HAVE_SIN_LEN
2685 sin->sin_len = sizeof(*sin);
2686 #endif
2687 sin->sin_port = sh->src_port;
2688 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2689 if (sin->sin_addr.s_addr == INADDR_ANY)
2690 zero_address = 1;
2691 break;
2692 }
2693 #endif
2694 default:
2695 /* invalid address param type */
2696 return NULL;
2697 }
2698
2699 if (zero_address) {
2700 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2701 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2702 if (stcb != NULL) {
2703 SCTP_INP_DECR_REF(*inp_p);
2704 }
2705 } else {
2706 stcb = sctp_findassociation_ep_addr(inp_p,
2707 (struct sockaddr *)&remote_store, netp,
2708 dst, NULL);
2709 }
2710 return (stcb);
2711 }
2712
2713
2714 /*
2715 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2716 * addresses. This way if we don't get a bind we by default pick a ephemeral
2717 * port with all addresses bound.
2718 */
2719 int
2720 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2721 {
2722 /*
2723 * we get called when a new endpoint starts up. We need to allocate
2724 * the sctp_inpcb structure from the zone and init it. Mark it as
2725 * unbound and find a port that we can use as an ephemeral with
2726 * INADDR_ANY. If the user binds later no problem we can then add in
2727 * the specific addresses. And setup the default parameters for the
2728 * EP.
2729 */
2730 int i, error;
2731 struct sctp_inpcb *inp;
2732 struct sctp_pcb *m;
2733 struct timeval time;
2734 sctp_sharedkey_t *null_key;
2735
2736 error = 0;
2737
2738 SCTP_INP_INFO_WLOCK();
2739 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2740 if (inp == NULL) {
2741 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2742 SCTP_INP_INFO_WUNLOCK();
2743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2744 return (ENOBUFS);
2745 }
2746 /* zap it */
2747 bzero(inp, sizeof(*inp));
2748
2749 /* bump generations */
2750 #if defined(__APPLE__)
2751 inp->ip_inp.inp.inp_state = INPCB_STATE_INUSE;
2752 #endif
2753 /* setup socket pointers */
2754 inp->sctp_socket = so;
2755 inp->ip_inp.inp.inp_socket = so;
2756 #ifdef INET6
2757 #if !defined(__Userspace__) && !defined(__Windows__)
2758 if (INP_SOCKAF(so) == AF_INET6) {
2759 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2760 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2761 }
2762 if (MODULE_GLOBAL(ip6_v6only)) {
2763 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2764 }
2765 }
2766 #endif
2767 #endif
2768 inp->sctp_associd_counter = 1;
2769 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2770 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2771 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2772 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2773 #if defined(__Userspace__)
2774 inp->ulp_info = NULL;
2775 inp->recv_callback = NULL;
2776 inp->send_callback = NULL;
2777 inp->send_sb_threshold = 0;
2778 #endif
2779 /* init the small hash table we use to track asocid <-> tcb */
2780 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2781 if (inp->sctp_asocidhash == NULL) {
2782 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2783 SCTP_INP_INFO_WUNLOCK();
2784 return (ENOBUFS);
2785 }
2786 #ifdef IPSEC
2787 #if !(defined(__APPLE__))
2788 {
2789 struct inpcbpolicy *pcb_sp = NULL;
2790
2791 error = ipsec_init_policy(so, &pcb_sp);
2792 /* Arrange to share the policy */
2793 inp->ip_inp.inp.inp_sp = pcb_sp;
2794 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2795 }
2796 #else
2797 /* not sure what to do for openbsd here */
2798 error = 0;
2799 #endif
2800 if (error != 0) {
2801 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2802 SCTP_INP_INFO_WUNLOCK();
2803 return error;
2804 }
2805 #endif /* IPSEC */
2806 SCTP_INCR_EP_COUNT();
2807 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2808 SCTP_INP_INFO_WUNLOCK();
2809
2810 so->so_pcb = (caddr_t)inp;
2811
2812 #if defined(__FreeBSD__) && __FreeBSD_version < 803000
2813 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2814 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2815 #else
2816 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2817 #endif
2818 /* UDP style socket */
2819 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2820 SCTP_PCB_FLAGS_UNBOUND);
2821 /* Be sure it is NON-BLOCKING IO for UDP */
2822 /* SCTP_SET_SO_NBIO(so); */
2823 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2824 /* TCP style socket */
2825 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2826 SCTP_PCB_FLAGS_UNBOUND);
2827 /* Be sure we have blocking IO by default */
2828 SCTP_CLEAR_SO_NBIO(so);
2829 #if defined(__Panda__)
2830 } else if (SCTP_SO_TYPE(so) == SOCK_FASTSEQPACKET) {
2831 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2832 SCTP_PCB_FLAGS_UNBOUND);
2833 sctp_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE);
2834 } else if (SCTP_SO_TYPE(so) == SOCK_FASTSTREAM) {
2835 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2836 SCTP_PCB_FLAGS_UNBOUND);
2837 sctp_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE);
2838 #endif
2839 } else {
2840 /*
2841 * unsupported socket type (RAW, etc)- in case we missed it
2842 * in protosw
2843 */
2844 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2845 so->so_pcb = NULL;
2846 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2847 return (EOPNOTSUPP);
2848 }
2849 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2850 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2851 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2852 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2853 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2854 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2855 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2856 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2857 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2858 }
2859 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2860 &inp->sctp_hashmark);
2861 if (inp->sctp_tcbhash == NULL) {
2862 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2864 so->so_pcb = NULL;
2865 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2866 return (ENOBUFS);
2867 }
2868 #ifdef SCTP_MVRF
2869 inp->vrf_size = SCTP_DEFAULT_VRF_SIZE;
2870 SCTP_MALLOC(inp->m_vrf_ids, uint32_t *,
2871 (sizeof(uint32_t) * inp->vrf_size), SCTP_M_MVRF);
2872 if (inp->m_vrf_ids == NULL) {
2873 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2874 so->so_pcb = NULL;
2875 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2876 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2877 return (ENOBUFS);
2878 }
2879 inp->m_vrf_ids[0] = vrf_id;
2880 inp->num_vrfs = 1;
2881 #endif
2882 inp->def_vrf_id = vrf_id;
2883
2884 #if defined(__APPLE__)
2885 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
2886 inp->ip_inp.inp.inpcb_mtx = lck_mtx_alloc_init(SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2887 if (inp->ip_inp.inp.inpcb_mtx == NULL) {
2888 SCTP_PRINTF("in_pcballoc: can't alloc mutex! so=%p\n", (void *)so);
2889 #ifdef SCTP_MVRF
2890 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
2891 #endif
2892 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2893 so->so_pcb = NULL;
2894 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2895 SCTP_UNLOCK_EXC(SCTP_BASE_INFO(sctbinfo).ipi_lock);
2896 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
2897 return (ENOMEM);
2898 }
2899 #elif defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2900 lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2901 #else
2902 lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).ipi_lock_grp, SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
2903 #endif
2904 #endif
2905 SCTP_INP_INFO_WLOCK();
2906 SCTP_INP_LOCK_INIT(inp);
2907 #if defined(__FreeBSD__)
2908 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2909 #endif
2910 SCTP_INP_READ_INIT(inp);
2911 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2912 /* lock the new ep */
2913 SCTP_INP_WLOCK(inp);
2914
2915 /* add it to the info area */
2916 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2917 #if defined(__APPLE__)
2918 inp->ip_inp.inp.inp_pcbinfo = &SCTP_BASE_INFO(sctbinfo);
2919 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2920 LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).listhead, &inp->ip_inp.inp, inp_list);
2921 #else
2922 LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).ipi_listhead, &inp->ip_inp.inp, inp_list);
2923 #endif
2924 #endif
2925 SCTP_INP_INFO_WUNLOCK();
2926
2927 TAILQ_INIT(&inp->read_queue);
2928 LIST_INIT(&inp->sctp_addr_list);
2929
2930 LIST_INIT(&inp->sctp_asoc_list);
2931
2932 #ifdef SCTP_TRACK_FREED_ASOCS
2933 /* TEMP CODE */
2934 LIST_INIT(&inp->sctp_asoc_free_list);
2935 #endif
2936 /* Init the timer structure for signature change */
2937 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2938 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2939
2940 /* now init the actual endpoint default data */
2941 m = &inp->sctp_ep;
2942
2943 /* setup the base timeout information */
2944 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
2945 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
2946 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2947 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2948 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2949 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2950 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2951 /* all max/min max are in ms */
2952 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2953 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2954 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2955 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2956 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2957 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2958 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2959 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2960 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2961 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2962 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2963 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2964 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2965
2966 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2967 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2968 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2969 /* number of streams to pre-open on a association */
2970 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2971
2972 /* Add adaptation cookie */
2973 m->adaptation_layer_indicator = 0;
2974 m->adaptation_layer_indicator_provided = 0;
2975
2976 /* seed random number generator */
2977 m->random_counter = 1;
2978 m->store_at = SCTP_SIGNATURE_SIZE;
2979 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2980 sctp_fill_random_store(m);
2981
2982 /* Minimum cookie size */
2983 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2984 sizeof(struct sctp_state_cookie);
2985 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2986
2987 /* Setup the initial secret */
2988 (void)SCTP_GETTIME_TIMEVAL(&time);
2989 m->time_of_secret_change = time.tv_sec;
2990
2991 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2992 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2993 }
2994 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2995
2996 /* How long is a cookie good for ? */
2997 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2998 /*
2999 * Initialize authentication parameters
3000 */
3001 m->local_hmacs = sctp_default_supported_hmaclist();
3002 m->local_auth_chunks = sctp_alloc_chunklist();
3003 m->default_dscp = 0;
3004 #ifdef INET6
3005 m->default_flowlabel = 0;
3006 #endif
3007 m->port = 0; /* encapsulation disabled by default */
3008 sctp_auth_set_default_chunks(m->local_auth_chunks);
3009 LIST_INIT(&m->shared_keys);
3010 /* add default NULL key as key id 0 */
3011 null_key = sctp_alloc_sharedkey();
3012 sctp_insert_sharedkey(&m->shared_keys, null_key);
3013 SCTP_INP_WUNLOCK(inp);
3014 #ifdef SCTP_LOG_CLOSING
3015 sctp_log_closing(inp, NULL, 12);
3016 #endif
3017 return (error);
3018 }
3019
3020
3021 void
3022 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
3023 struct sctp_tcb *stcb)
3024 {
3025 struct sctp_nets *net;
3026 uint16_t lport, rport;
3027 struct sctppcbhead *head;
3028 struct sctp_laddr *laddr, *oladdr;
3029
3030 atomic_add_int(&stcb->asoc.refcnt, 1);
3031 SCTP_TCB_UNLOCK(stcb);
3032 SCTP_INP_INFO_WLOCK();
3033 SCTP_INP_WLOCK(old_inp);
3034 SCTP_INP_WLOCK(new_inp);
3035 SCTP_TCB_LOCK(stcb);
3036 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3037
3038 new_inp->sctp_ep.time_of_secret_change =
3039 old_inp->sctp_ep.time_of_secret_change;
3040 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
3041 sizeof(old_inp->sctp_ep.secret_key));
3042 new_inp->sctp_ep.current_secret_number =
3043 old_inp->sctp_ep.current_secret_number;
3044 new_inp->sctp_ep.last_secret_number =
3045 old_inp->sctp_ep.last_secret_number;
3046 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
3047
3048 /* make it so new data pours into the new socket */
3049 stcb->sctp_socket = new_inp->sctp_socket;
3050 stcb->sctp_ep = new_inp;
3051
3052 /* Copy the port across */
3053 lport = new_inp->sctp_lport = old_inp->sctp_lport;
3054 rport = stcb->rport;
3055 /* Pull the tcb from the old association */
3056 LIST_REMOVE(stcb, sctp_tcbhash);
3057 LIST_REMOVE(stcb, sctp_tcblist);
3058 if (stcb->asoc.in_asocid_hash) {
3059 LIST_REMOVE(stcb, sctp_tcbasocidhash);
3060 }
3061 /* Now insert the new_inp into the TCP connected hash */
3062 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
3063
3064 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
3065 /* Its safe to access */
3066 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3067
3068 /* Now move the tcb into the endpoint list */
3069 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
3070 /*
3071 * Question, do we even need to worry about the ep-hash since we
3072 * only have one connection? Probably not :> so lets get rid of it
3073 * and not suck up any kernel memory in that.
3074 */
3075 if (stcb->asoc.in_asocid_hash) {
3076 struct sctpasochead *lhd;
3077 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
3078 new_inp->hashasocidmark)];
3079 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
3080 }
3081 /* Ok. Let's restart timer. */
3082 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3083 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
3084 stcb, net);
3085 }
3086
3087 SCTP_INP_INFO_WUNLOCK();
3088 if (new_inp->sctp_tcbhash != NULL) {
3089 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
3090 new_inp->sctp_tcbhash = NULL;
3091 }
3092 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
3093 /* Subset bound, so copy in the laddr list from the old_inp */
3094 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
3095 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3096 if (laddr == NULL) {
3097 /*
3098 * Gak, what can we do? This assoc is really
3099 * HOSED. We probably should send an abort
3100 * here.
3101 */
3102 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
3103 continue;
3104 }
3105 SCTP_INCR_LADDR_COUNT();
3106 bzero(laddr, sizeof(*laddr));
3107 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
3108 laddr->ifa = oladdr->ifa;
3109 atomic_add_int(&laddr->ifa->refcount, 1);
3110 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
3111 sctp_nxt_addr);
3112 new_inp->laddr_count++;
3113 if (oladdr == stcb->asoc.last_used_address) {
3114 stcb->asoc.last_used_address = laddr;
3115 }
3116 }
3117 }
3118 /* Now any running timers need to be adjusted
3119 * since we really don't care if they are running
3120 * or not just blast in the new_inp into all of
3121 * them.
3122 */
3123
3124 stcb->asoc.dack_timer.ep = (void *)new_inp;
3125 stcb->asoc.asconf_timer.ep = (void *)new_inp;
3126 stcb->asoc.strreset_timer.ep = (void *)new_inp;
3127 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
3128 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
3129 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
3130 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
3131 /* now what about the nets? */
3132 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3133 net->pmtu_timer.ep = (void *)new_inp;
3134 net->hb_timer.ep = (void *)new_inp;
3135 net->rxt_timer.ep = (void *)new_inp;
3136 }
3137 SCTP_INP_WUNLOCK(new_inp);
3138 SCTP_INP_WUNLOCK(old_inp);
3139 }
3140
3141
3142 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__))
3143 /*
3144 * Don't know why, but without this there is an unknown reference when
3145 * compiling NetBSD... hmm
3146 */
3147 extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *sin6);
3148 #endif
3149
3150
3151 /* sctp_ifap is used to bypass normal local address validation checks */
3152 int
3153 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3154 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3155 struct sctp_ifa *sctp_ifap, struct thread *p)
3156 #elif defined(__Windows__)
3157 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3158 struct sctp_ifa *sctp_ifap, PKTHREAD p)
3159 #else
3160 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3161 struct sctp_ifa *sctp_ifap, struct proc *p)
3162 #endif
3163 {
3164 /* bind a ep to a socket address */
3165 struct sctppcbhead *head;
3166 struct sctp_inpcb *inp, *inp_tmp;
3167 #if defined(INET) || (defined(INET6) && defined(__APPLE__)) || defined(__FreeBSD__) || defined(__APPLE__)
3168 struct inpcb *ip_inp;
3169 #endif
3170 int port_reuse_active = 0;
3171 int bindall;
3172 #ifdef SCTP_MVRF
3173 int i;
3174 #endif
3175 uint16_t lport;
3176 int error;
3177 uint32_t vrf_id;
3178
3179 lport = 0;
3180 bindall = 1;
3181 inp = (struct sctp_inpcb *)so->so_pcb;
3182 #if defined(INET) || (defined(INET6) && defined(__APPLE__)) || defined(__FreeBSD__) || defined(__APPLE__)
3183 ip_inp = (struct inpcb *)so->so_pcb;
3184 #endif
3185 #ifdef SCTP_DEBUG
3186 if (addr) {
3187 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
3188 ntohs(((struct sockaddr_in *)addr)->sin_port));
3189 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
3190 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
3191 }
3192 #endif
3193 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3194 /* already did a bind, subsequent binds NOT allowed ! */
3195 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3196 return (EINVAL);
3197 }
3198 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3199 #ifdef INVARIANTS
3200 if (p == NULL)
3201 panic("null proc/thread");
3202 #endif
3203 #endif
3204 if (addr != NULL) {
3205 switch (addr->sa_family) {
3206 #ifdef INET
3207 case AF_INET:
3208 {
3209 struct sockaddr_in *sin;
3210
3211 /* IPV6_V6ONLY socket? */
3212 if (SCTP_IPV6_V6ONLY(ip_inp)) {
3213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3214 return (EINVAL);
3215 }
3216 #ifdef HAVE_SA_LEN
3217 if (addr->sa_len != sizeof(*sin)) {
3218 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3219 return (EINVAL);
3220 }
3221 #endif
3222
3223 sin = (struct sockaddr_in *)addr;
3224 lport = sin->sin_port;
3225 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
3226 /*
3227 * For LOOPBACK the prison_local_ip4() call will transmute the ip address
3228 * to the proper value.
3229 */
3230 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
3231 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3232 return (error);
3233 }
3234 #endif
3235 if (sin->sin_addr.s_addr != INADDR_ANY) {
3236 bindall = 0;
3237 }
3238 break;
3239 }
3240 #endif
3241 #ifdef INET6
3242 case AF_INET6:
3243 {
3244 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
3245 struct sockaddr_in6 *sin6;
3246
3247 sin6 = (struct sockaddr_in6 *)addr;
3248
3249 #ifdef HAVE_SA_LEN
3250 if (addr->sa_len != sizeof(*sin6)) {
3251 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3252 return (EINVAL);
3253 }
3254 #endif
3255 lport = sin6->sin6_port;
3256 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
3257 /*
3258 * For LOOPBACK the prison_local_ip6() call will transmute the ipv6 address
3259 * to the proper value.
3260 */
3261 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
3262 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
3263 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3264 return (error);
3265 }
3266 #endif
3267 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3268 bindall = 0;
3269 #ifdef SCTP_EMBEDDED_V6_SCOPE
3270 /* KAME hack: embed scopeid */
3271 #if defined(SCTP_KAME)
3272 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3273 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3274 return (EINVAL);
3275 }
3276 #elif defined(__APPLE__)
3277 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
3278 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL) != 0) {
3279 #else
3280 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL, NULL) != 0) {
3281 #endif
3282 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3283 return (EINVAL);
3284 }
3285 #elif defined(__FreeBSD__)
3286 error = scope6_check_id(sin6, MODULE_GLOBAL(ip6_use_defzone));
3287 if (error != 0) {
3288 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3289 return (error);
3290 }
3291 #else
3292 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
3293 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3294 return (EINVAL);
3295 }
3296 #endif
3297 #endif /* SCTP_EMBEDDED_V6_SCOPE */
3298 }
3299 #ifndef SCOPEDROUTING
3300 /* this must be cleared for ifa_ifwithaddr() */
3301 sin6->sin6_scope_id = 0;
3302 #endif /* SCOPEDROUTING */
3303 break;
3304 }
3305 #endif
3306 #if defined(__Userspace__)
3307 case AF_CONN:
3308 {
3309 struct sockaddr_conn *sconn;
3310
3311 #ifdef HAVE_SA_LEN
3312 if (addr->sa_len != sizeof(struct sockaddr_conn)) {
3313 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3314 return (EINVAL);
3315 }
3316 #endif
3317 sconn = (struct sockaddr_conn *)addr;
3318 lport = sconn->sconn_port;
3319 if (sconn->sconn_addr != NULL) {
3320 bindall = 0;
3321 }
3322 break;
3323 }
3324 #endif
3325 default:
3326 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
3327 return (EAFNOSUPPORT);
3328 }
3329 }
3330 SCTP_INP_INFO_WLOCK();
3331 SCTP_INP_WLOCK(inp);
3332 /* Setup a vrf_id to be the default for the non-bind-all case. */
3333 vrf_id = inp->def_vrf_id;
3334
3335 /* increase our count due to the unlock we do */
3336 SCTP_INP_INCR_REF(inp);
3337 if (lport) {
3338 /*
3339 * Did the caller specify a port? if so we must see if an ep
3340 * already has this one bound.
3341 */
3342 /* got to be root to get at low ports */
3343 #if !defined(__Windows__)
3344 if (ntohs(lport) < IPPORT_RESERVED) {
3345 if (p && (error =
3346 #ifdef __FreeBSD__
3347 #if __FreeBSD_version > 602000
3348 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3349 #elif __FreeBSD_version >= 500000
3350 suser_cred(p->td_ucred, 0)
3351 #else
3352 suser(p)
3353 #endif
3354 #elif defined(__APPLE__)
3355 suser(p->p_ucred, &p->p_acflag)
3356 #elif defined(__Userspace__) /* must be true to use raw socket */
3357 1
3358 #else
3359 suser(p, 0)
3360 #endif
3361 )) {
3362 SCTP_INP_DECR_REF(inp);
3363 SCTP_INP_WUNLOCK(inp);
3364 SCTP_INP_INFO_WUNLOCK();
3365 return (error);
3366 }
3367 #if defined(__Panda__)
3368 if (!SCTP_IS_PRIVILEDGED(so)) {
3369 SCTP_INP_DECR_REF(inp);
3370 SCTP_INP_WUNLOCK(inp);
3371 SCTP_INP_INFO_WUNLOCK();
3372 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EACCES);
3373 return (EACCES);
3374 }
3375 #endif
3376 }
3377 #endif /* __Windows__ */
3378 SCTP_INP_WUNLOCK(inp);
3379 if (bindall) {
3380 #ifdef SCTP_MVRF
3381 for (i = 0; i < inp->num_vrfs; i++) {
3382 vrf_id = inp->m_vrf_ids[i];
3383 #else
3384 vrf_id = inp->def_vrf_id;
3385 #endif
3386 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3387 if (inp_tmp != NULL) {
3388 /*
3389 * lock guy returned and lower count
3390 * note that we are not bound so
3391 * inp_tmp should NEVER be inp. And
3392 * it is this inp (inp_tmp) that gets
3393 * the reference bump, so we must
3394 * lower it.
3395 */
3396 SCTP_INP_DECR_REF(inp_tmp);
3397 /* unlock info */
3398 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3399 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3400 /* Ok, must be one-2-one and allowing port re-use */
3401 port_reuse_active = 1;
3402 goto continue_anyway;
3403 }
3404 SCTP_INP_DECR_REF(inp);
3405 SCTP_INP_INFO_WUNLOCK();
3406 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3407 return (EADDRINUSE);
3408 }
3409 #ifdef SCTP_MVRF
3410 }
3411 #endif
3412 } else {
3413 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3414 if (inp_tmp != NULL) {
3415 /*
3416 * lock guy returned and lower count note
3417 * that we are not bound so inp_tmp should
3418 * NEVER be inp. And it is this inp (inp_tmp)
3419 * that gets the reference bump, so we must
3420 * lower it.
3421 */
3422 SCTP_INP_DECR_REF(inp_tmp);
3423 /* unlock info */
3424 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3425 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3426 /* Ok, must be one-2-one and allowing port re-use */
3427 port_reuse_active = 1;
3428 goto continue_anyway;
3429 }
3430 SCTP_INP_DECR_REF(inp);
3431 SCTP_INP_INFO_WUNLOCK();
3432 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3433 return (EADDRINUSE);
3434 }
3435 }
3436 continue_anyway:
3437 SCTP_INP_WLOCK(inp);
3438 if (bindall) {
3439 /* verify that no lport is not used by a singleton */
3440 if ((port_reuse_active == 0) &&
3441 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3442 /* Sorry someone already has this one bound */
3443 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3444 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3445 port_reuse_active = 1;
3446 } else {
3447 SCTP_INP_DECR_REF(inp);
3448 SCTP_INP_WUNLOCK(inp);
3449 SCTP_INP_INFO_WUNLOCK();
3450 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3451 return (EADDRINUSE);
3452 }
3453 }
3454 }
3455 } else {
3456 uint16_t first, last, candidate;
3457 uint16_t count;
3458 int done;
3459
3460 #if defined(__Windows__)
3461 first = 1;
3462 last = 0xffff;
3463 #else
3464 #if defined(__Userspace__)
3465 /* TODO ensure uid is 0, etc... */
3466 #elif defined(__FreeBSD__) || defined(__APPLE__)
3467 if (ip_inp->inp_flags & INP_HIGHPORT) {
3468 first = MODULE_GLOBAL(ipport_hifirstauto);
3469 last = MODULE_GLOBAL(ipport_hilastauto);
3470 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3471 if (p && (error =
3472 #ifdef __FreeBSD__
3473 #if __FreeBSD_version > 602000
3474 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3475 #elif __FreeBSD_version >= 500000
3476 suser_cred(p->td_ucred, 0)
3477 #else
3478 suser(p)
3479 #endif
3480 #elif defined(__APPLE__)
3481 suser(p->p_ucred, &p->p_acflag)
3482 #else
3483 suser(p, 0)
3484 #endif
3485 )) {
3486 SCTP_INP_DECR_REF(inp);
3487 SCTP_INP_WUNLOCK(inp);
3488 SCTP_INP_INFO_WUNLOCK();
3489 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3490 return (error);
3491 }
3492 first = MODULE_GLOBAL(ipport_lowfirstauto);
3493 last = MODULE_GLOBAL(ipport_lowlastauto);
3494 } else {
3495 #endif
3496 first = MODULE_GLOBAL(ipport_firstauto);
3497 last = MODULE_GLOBAL(ipport_lastauto);
3498 #if defined(__FreeBSD__) || defined(__APPLE__)
3499 }
3500 #endif
3501 #endif /* __Windows__ */
3502 if (first > last) {
3503 uint16_t temp;
3504
3505 temp = first;
3506 first = last;
3507 last = temp;
3508 }
3509 count = last - first + 1; /* number of candidates */
3510 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3511
3512 done = 0;
3513 while (!done) {
3514 #ifdef SCTP_MVRF
3515 for (i = 0; i < inp->num_vrfs; i++) {
3516 if (sctp_isport_inuse(inp, htons(candidate), inp->m_vrf_ids[i]) != NULL) {
3517 break;
3518 }
3519 }
3520 if (i == inp->num_vrfs) {
3521 done = 1;
3522 }
3523 #else
3524 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3525 done = 1;
3526 }
3527 #endif
3528 if (!done) {
3529 if (--count == 0) {
3530 SCTP_INP_DECR_REF(inp);
3531 SCTP_INP_WUNLOCK(inp);
3532 SCTP_INP_INFO_WUNLOCK();
3533 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3534 return (EADDRINUSE);
3535 }
3536 if (candidate == last)
3537 candidate = first;
3538 else
3539 candidate = candidate + 1;
3540 }
3541 }
3542 lport = htons(candidate);
3543 }
3544 SCTP_INP_DECR_REF(inp);
3545 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3546 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3547 /*
3548 * this really should not happen. The guy did a non-blocking
3549 * bind and then did a close at the same time.
3550 */
3551 SCTP_INP_WUNLOCK(inp);
3552 SCTP_INP_INFO_WUNLOCK();
3553 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3554 return (EINVAL);
3555 }
3556 /* ok we look clear to give out this port, so lets setup the binding */
3557 if (bindall) {
3558 /* binding to all addresses, so just set in the proper flags */
3559 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3560 /* set the automatic addr changes from kernel flag */
3561 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3562 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3563 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3564 } else {
3565 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3566 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3567 }
3568 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3569 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3570 } else {
3571 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3572 }
3573 /* set the automatic mobility_base from kernel
3574 flag (by micchie)
3575 */
3576 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3577 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3578 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3579 } else {
3580 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3581 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3582 }
3583 /* set the automatic mobility_fasthandoff from kernel
3584 flag (by micchie)
3585 */
3586 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3587 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3588 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3589 } else {
3590 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3591 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3592 }
3593 } else {
3594 /*
3595 * bind specific, make sure flags is off and add a new
3596 * address structure to the sctp_addr_list inside the ep
3597 * structure.
3598 *
3599 * We will need to allocate one and insert it at the head. The
3600 * socketopt call can just insert new addresses in there as
3601 * well. It will also have to do the embed scope kame hack
3602 * too (before adding).
3603 */
3604 struct sctp_ifa *ifa;
3605 struct sockaddr_storage store_sa;
3606
3607 memset(&store_sa, 0, sizeof(store_sa));
3608 switch (addr->sa_family) {
3609 #ifdef INET
3610 case AF_INET:
3611 {
3612 struct sockaddr_in *sin;
3613
3614 sin = (struct sockaddr_in *)&store_sa;
3615 memcpy(sin, addr, sizeof(struct sockaddr_in));
3616 sin->sin_port = 0;
3617 break;
3618 }
3619 #endif
3620 #ifdef INET6
3621 case AF_INET6:
3622 {
3623 struct sockaddr_in6 *sin6;
3624
3625 sin6 = (struct sockaddr_in6 *)&store_sa;
3626 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3627 sin6->sin6_port = 0;
3628 break;
3629 }
3630 #endif
3631 #if defined(__Userspace__)
3632 case AF_CONN:
3633 {
3634 struct sockaddr_conn *sconn;
3635
3636 sconn = (struct sockaddr_conn *)&store_sa;
3637 memcpy(sconn, addr, sizeof(struct sockaddr_conn));
3638 sconn->sconn_port = 0;
3639 break;
3640 }
3641 #endif
3642 default:
3643 break;
3644 }
3645 /*
3646 * first find the interface with the bound address need to
3647 * zero out the port to find the address! yuck! can't do
3648 * this earlier since need port for sctp_pcb_findep()
3649 */
3650 if (sctp_ifap != NULL) {
3651 ifa = sctp_ifap;
3652 } else {
3653 /* Note for BSD we hit here always other
3654 * O/S's will pass things in via the
3655 * sctp_ifap argument (Panda).
3656 */
3657 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3658 vrf_id, SCTP_ADDR_NOT_LOCKED);
3659 }
3660 if (ifa == NULL) {
3661 /* Can't find an interface with that address */
3662 SCTP_INP_WUNLOCK(inp);
3663 SCTP_INP_INFO_WUNLOCK();
3664 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3665 return (EADDRNOTAVAIL);
3666 }
3667 #ifdef INET6
3668 if (addr->sa_family == AF_INET6) {
3669 /* GAK, more FIXME IFA lock? */
3670 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3671 /* Can't bind a non-existent addr. */
3672 SCTP_INP_WUNLOCK(inp);
3673 SCTP_INP_INFO_WUNLOCK();
3674 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3675 return (EINVAL);
3676 }
3677 }
3678 #endif
3679 /* we're not bound all */
3680 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3681 /* allow bindx() to send ASCONF's for binding changes */
3682 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3683 /* clear automatic addr changes from kernel flag */
3684 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3685
3686 /* add this address to the endpoint list */
3687 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3688 if (error != 0) {
3689 SCTP_INP_WUNLOCK(inp);
3690 SCTP_INP_INFO_WUNLOCK();
3691 return (error);
3692 }
3693 inp->laddr_count++;
3694 }
3695 /* find the bucket */
3696 if (port_reuse_active) {
3697 /* Put it into tcp 1-2-1 hash */
3698 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3699 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3700 } else {
3701 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3702 }
3703 /* put it in the bucket */
3704 LIST_INSERT_HEAD(head, inp, sctp_hash);
3705 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3706 (void *)head, ntohs(lport), port_reuse_active);
3707 /* set in the port */
3708 inp->sctp_lport = lport;
3709
3710 /* turn off just the unbound flag */
3711 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3712 SCTP_INP_WUNLOCK(inp);
3713 SCTP_INP_INFO_WUNLOCK();
3714 return (0);
3715 }
3716
3717
3718 static void
3719 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3720 {
3721 struct sctp_iterator *it, *nit;
3722
3723 /*
3724 * We enter with the only the ITERATOR_LOCK in place and a write
3725 * lock on the inp_info stuff.
3726 */
3727 it = sctp_it_ctl.cur_it;
3728 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
3729 if (it && (it->vn != curvnet)) {
3730 /* Its not looking at our VNET */
3731 return;
3732 }
3733 #endif
3734 if (it && (it->inp == inp)) {
3735 /*
3736 * This is tricky and we hold the iterator lock,
3737 * but when it returns and gets the lock (when we
3738 * release it) the iterator will try to operate on
3739 * inp. We need to stop that from happening. But
3740 * of course the iterator has a reference on the
3741 * stcb and inp. We can mark it and it will stop.
3742 *
3743 * If its a single iterator situation, we
3744 * set the end iterator flag. Otherwise
3745 * we set the iterator to go to the next inp.
3746 *
3747 */
3748 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3749 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3750 } else {
3751 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3752 }
3753 }
3754 /* Now go through and remove any single reference to
3755 * our inp that may be still pending on the list
3756 */
3757 SCTP_IPI_ITERATOR_WQ_LOCK();
3758 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3759 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
3760 if (it->vn != curvnet) {
3761 continue;
3762 }
3763 #endif
3764 if (it->inp == inp) {
3765 /* This one points to me is it inp specific? */
3766 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3767 /* Remove and free this one */
3768 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3769 it, sctp_nxt_itr);
3770 if (it->function_atend != NULL) {
3771 (*it->function_atend) (it->pointer, it->val);
3772 }
3773 SCTP_FREE(it, SCTP_M_ITER);
3774 } else {
3775 it->inp = LIST_NEXT(it->inp, sctp_list);
3776 if (it->inp) {
3777 SCTP_INP_INCR_REF(it->inp);
3778 }
3779 }
3780 /* When its put in the refcnt is incremented so decr it */
3781 SCTP_INP_DECR_REF(inp);
3782 }
3783 }
3784 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3785 }
3786
3787 /* release sctp_inpcb unbind the port */
3788 void
3789 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3790 {
3791 /*
3792 * Here we free a endpoint. We must find it (if it is in the Hash
3793 * table) and remove it from there. Then we must also find it in the
3794 * overall list and remove it from there. After all removals are
3795 * complete then any timer has to be stopped. Then start the actual
3796 * freeing. a) Any local lists. b) Any associations. c) The hash of
3797 * all associations. d) finally the ep itself.
3798 */
3799 struct sctp_tcb *asoc, *nasoc;
3800 struct sctp_laddr *laddr, *nladdr;
3801 struct inpcb *ip_pcb;
3802 struct socket *so;
3803 int being_refed = 0;
3804 struct sctp_queued_to_read *sq, *nsq;
3805 #if !defined(__Panda__) && !defined(__Userspace__)
3806 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
3807 sctp_rtentry_t *rt;
3808 #endif
3809 #endif
3810 int cnt;
3811 sctp_sharedkey_t *shared_key, *nshared_key;
3812
3813
3814 #if defined(__APPLE__)
3815 sctp_lock_assert(SCTP_INP_SO(inp));
3816 #endif
3817 #ifdef SCTP_LOG_CLOSING
3818 sctp_log_closing(inp, NULL, 0);
3819 #endif
3820 SCTP_ITERATOR_LOCK();
3821 /* mark any iterators on the list or being processed */
3822 sctp_iterator_inp_being_freed(inp);
3823 SCTP_ITERATOR_UNLOCK();
3824 so = inp->sctp_socket;
3825 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3826 /* been here before.. eeks.. get out of here */
3827 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3828 #ifdef SCTP_LOG_CLOSING
3829 sctp_log_closing(inp, NULL, 1);
3830 #endif
3831 return;
3832 }
3833 SCTP_ASOC_CREATE_LOCK(inp);
3834 SCTP_INP_INFO_WLOCK();
3835
3836 SCTP_INP_WLOCK(inp);
3837 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3838 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3839 /* socket is gone, so no more wakeups allowed */
3840 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3841 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3842 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3843
3844 }
3845 /* First time through we have the socket lock, after that no more. */
3846 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3847 SCTP_FROM_SCTP_PCB+SCTP_LOC_1);
3848
3849 if (inp->control) {
3850 sctp_m_freem(inp->control);
3851 inp->control = NULL;
3852 }
3853 if (inp->pkt) {
3854 sctp_m_freem(inp->pkt);
3855 inp->pkt = NULL;
3856 }
3857 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3858 * here but I will be nice :> (i.e.
3859 * ip_pcb = ep;) */
3860 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3861 int cnt_in_sd;
3862
3863 cnt_in_sd = 0;
3864 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3865 SCTP_TCB_LOCK(asoc);
3866 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3867 /* Skip guys being freed */
3868 cnt_in_sd++;
3869 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3870 /*
3871 * Special case - we did not start a kill
3872 * timer on the asoc due to it was not
3873 * closed. So go ahead and start it now.
3874 */
3875 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3876 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3877 }
3878 SCTP_TCB_UNLOCK(asoc);
3879 continue;
3880 }
3881 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3882 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3883 (asoc->asoc.total_output_queue_size == 0)) {
3884 /* If we have data in queue, we don't want to just
3885 * free since the app may have done, send()/close
3886 * or connect/send/close. And it wants the data
3887 * to get across first.
3888 */
3889 /* Just abandon things in the front states */
3890 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3891 SCTP_FROM_SCTP_PCB+SCTP_LOC_2) == 0) {
3892 cnt_in_sd++;
3893 }
3894 continue;
3895 }
3896 /* Disconnect the socket please */
3897 asoc->sctp_socket = NULL;
3898 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3899 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3900 (asoc->asoc.control_pdapi) ||
3901 (asoc->asoc.size_on_all_streams > 0) ||
3902 (so && (so->so_rcv.sb_cc > 0))) {
3903 /* Left with Data unread */
3904 struct mbuf *op_err;
3905
3906 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3907 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_3;
3908 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3909 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3910 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3911 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3912 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3913 }
3914 if (sctp_free_assoc(inp, asoc,
3915 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB+SCTP_LOC_4) == 0) {
3916 cnt_in_sd++;
3917 }
3918 continue;
3919 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3920 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3921 (asoc->asoc.stream_queue_cnt == 0)) {
3922 if (asoc->asoc.locked_on_sending) {
3923 goto abort_anyway;
3924 }
3925 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3926 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3927 struct sctp_nets *netp;
3928
3929 /*
3930 * there is nothing queued to send,
3931 * so I send shutdown
3932 */
3933 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3934 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3935 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3936 }
3937 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3938 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3939 sctp_stop_timers_for_shutdown(asoc);
3940 if (asoc->asoc.alternate) {
3941 netp = asoc->asoc.alternate;
3942 } else {
3943 netp = asoc->asoc.primary_destination;
3944 }
3945 sctp_send_shutdown(asoc, netp);
3946 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3947 netp);
3948 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3949 asoc->asoc.primary_destination);
3950 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3951 }
3952 } else {
3953 /* mark into shutdown pending */
3954 struct sctp_stream_queue_pending *sp;
3955
3956 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3957 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3958 asoc->asoc.primary_destination);
3959 if (asoc->asoc.locked_on_sending) {
3960 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3961 sctp_streamhead);
3962 if (sp == NULL) {
3963 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3964 (void *)asoc->asoc.locked_on_sending,
3965 asoc->asoc.locked_on_sending->stream_no);
3966 } else {
3967 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3968 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3969 }
3970 }
3971 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3972 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3973 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3974 struct mbuf *op_err;
3975 abort_anyway:
3976 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3977 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_5;
3978 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3979 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3980 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3981 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3982 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3983 }
3984 if (sctp_free_assoc(inp, asoc,
3985 SCTP_PCBFREE_NOFORCE,
3986 SCTP_FROM_SCTP_PCB+SCTP_LOC_6) == 0) {
3987 cnt_in_sd++;
3988 }
3989 continue;
3990 } else {
3991 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3992 }
3993 }
3994 cnt_in_sd++;
3995 SCTP_TCB_UNLOCK(asoc);
3996 }
3997 /* now is there some left in our SHUTDOWN state? */
3998 if (cnt_in_sd) {
3999 #ifdef SCTP_LOG_CLOSING
4000 sctp_log_closing(inp, NULL, 2);
4001 #endif
4002 inp->sctp_socket = NULL;
4003 SCTP_INP_WUNLOCK(inp);
4004 SCTP_ASOC_CREATE_UNLOCK(inp);
4005 SCTP_INP_INFO_WUNLOCK();
4006 return;
4007 }
4008 }
4009 inp->sctp_socket = NULL;
4010 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
4011 SCTP_PCB_FLAGS_UNBOUND) {
4012 /*
4013 * ok, this guy has been bound. It's port is
4014 * somewhere in the SCTP_BASE_INFO(hash table). Remove
4015 * it!
4016 */
4017 LIST_REMOVE(inp, sctp_hash);
4018 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
4019 }
4020
4021 /* If there is a timer running to kill us,
4022 * forget it, since it may have a contest
4023 * on the INP lock.. which would cause us
4024 * to die ...
4025 */
4026 cnt = 0;
4027 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
4028 SCTP_TCB_LOCK(asoc);
4029 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4030 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
4031 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4032 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
4033 }
4034 cnt++;
4035 SCTP_TCB_UNLOCK(asoc);
4036 continue;
4037 }
4038 /* Free associations that are NOT killing us */
4039 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
4040 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
4041 struct mbuf *op_err;
4042
4043 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
4044 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_7;
4045 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4046 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4047 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4048 cnt++;
4049 SCTP_TCB_UNLOCK(asoc);
4050 continue;
4051 }
4052 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
4053 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4054 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4055 }
4056 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB+SCTP_LOC_8) == 0) {
4057 cnt++;
4058 }
4059 }
4060 if (cnt) {
4061 /* Ok we have someone out there that will kill us */
4062 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4063 #ifdef SCTP_LOG_CLOSING
4064 sctp_log_closing(inp, NULL, 3);
4065 #endif
4066 SCTP_INP_WUNLOCK(inp);
4067 SCTP_ASOC_CREATE_UNLOCK(inp);
4068 SCTP_INP_INFO_WUNLOCK();
4069 return;
4070 }
4071 if (SCTP_INP_LOCK_CONTENDED(inp))
4072 being_refed++;
4073 if (SCTP_INP_READ_CONTENDED(inp))
4074 being_refed++;
4075 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
4076 being_refed++;
4077
4078 if ((inp->refcount) ||
4079 (being_refed) ||
4080 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
4081 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4082 #ifdef SCTP_LOG_CLOSING
4083 sctp_log_closing(inp, NULL, 4);
4084 #endif
4085 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
4086 SCTP_INP_WUNLOCK(inp);
4087 SCTP_ASOC_CREATE_UNLOCK(inp);
4088 SCTP_INP_INFO_WUNLOCK();
4089 return;
4090 }
4091 inp->sctp_ep.signature_change.type = 0;
4092 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
4093 /* Remove it from the list .. last thing we need a
4094 * lock for.
4095 */
4096 LIST_REMOVE(inp, sctp_list);
4097 SCTP_INP_WUNLOCK(inp);
4098 SCTP_ASOC_CREATE_UNLOCK(inp);
4099 SCTP_INP_INFO_WUNLOCK();
4100 /* Now we release all locks. Since this INP
4101 * cannot be found anymore except possibly by the
4102 * kill timer that might be running. We call
4103 * the drain function here. It should hit the case
4104 * were it sees the ACTIVE flag cleared and exit
4105 * out freeing us to proceed and destroy everything.
4106 */
4107 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
4108 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
4109 } else {
4110 /* Probably un-needed */
4111 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4112 }
4113
4114 #ifdef SCTP_LOG_CLOSING
4115 sctp_log_closing(inp, NULL, 5);
4116 #endif
4117
4118 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4119 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
4120 rt = ip_pcb->inp_route.ro_rt;
4121 #endif
4122 #endif
4123
4124 #if defined(__Panda__)
4125 if (inp->pak_to_read) {
4126 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.zero_copy_timer.timer);
4127 SCTP_RELEASE_PKT(inp->pak_to_read);
4128 inp->pak_to_read = NULL;
4129 }
4130 if (inp->pak_to_read_sendq) {
4131 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.zero_copy_sendq_timer.timer);
4132 SCTP_RELEASE_PKT(inp->pak_to_read_sendq);
4133 inp->pak_to_read_sendq = NULL;
4134 }
4135 #endif
4136 if ((inp->sctp_asocidhash) != NULL) {
4137 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
4138 inp->sctp_asocidhash = NULL;
4139 }
4140 /*sa_ignore FREED_MEMORY*/
4141 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
4142 /* Its only abandoned if it had data left */
4143 if (sq->length)
4144 SCTP_STAT_INCR(sctps_left_abandon);
4145
4146 TAILQ_REMOVE(&inp->read_queue, sq, next);
4147 sctp_free_remote_addr(sq->whoFrom);
4148 if (so)
4149 so->so_rcv.sb_cc -= sq->length;
4150 if (sq->data) {
4151 sctp_m_freem(sq->data);
4152 sq->data = NULL;
4153 }
4154 /*
4155 * no need to free the net count, since at this point all
4156 * assoc's are gone.
4157 */
4158 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4159 SCTP_DECR_READQ_COUNT();
4160 }
4161 /* Now the sctp_pcb things */
4162 /*
4163 * free each asoc if it is not already closed/free. we can't use the
4164 * macro here since le_next will get freed as part of the
4165 * sctp_free_assoc() call.
4166 */
4167 if (so) {
4168 #ifdef IPSEC
4169 ipsec_delete_pcbpolicy(ip_pcb);
4170 #endif /* IPSEC */
4171
4172 /* Unlocks not needed since the socket is gone now */
4173 }
4174 #ifndef __Panda__
4175 if (ip_pcb->inp_options) {
4176 (void)sctp_m_free(ip_pcb->inp_options);
4177 ip_pcb->inp_options = 0;
4178 }
4179 #endif
4180
4181 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4182 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
4183 if (rt) {
4184 RTFREE(rt);
4185 ip_pcb->inp_route.ro_rt = 0;
4186 }
4187 #endif
4188 #if defined(__FreeBSD__) && __FreeBSD_version < 803000
4189 #ifdef INET
4190 if (ip_pcb->inp_moptions) {
4191 inp_freemoptions(ip_pcb->inp_moptions);
4192 ip_pcb->inp_moptions = 0;
4193 }
4194 #endif
4195 #endif
4196 #endif
4197
4198 #ifdef INET6
4199 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4200 #if defined(__FreeBSD__) || defined(__APPLE__)
4201 if (ip_pcb->inp_vflag & INP_IPV6) {
4202 #else
4203 if (inp->inp_vflag & INP_IPV6) {
4204 #endif
4205 struct in6pcb *in6p;
4206
4207 in6p = (struct in6pcb *)inp;
4208 ip6_freepcbopts(in6p->in6p_outputopts);
4209 }
4210 #endif
4211 #endif /* INET6 */
4212 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
4213 inp->inp_vflag = 0;
4214 #else
4215 ip_pcb->inp_vflag = 0;
4216 #endif
4217 /* free up authentication fields */
4218 if (inp->sctp_ep.local_auth_chunks != NULL)
4219 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
4220 if (inp->sctp_ep.local_hmacs != NULL)
4221 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
4222
4223 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
4224 LIST_REMOVE(shared_key, next);
4225 sctp_free_sharedkey(shared_key);
4226 /*sa_ignore FREED_MEMORY*/
4227 }
4228
4229 #if defined(__APPLE__)
4230 inp->ip_inp.inp.inp_state = INPCB_STATE_DEAD;
4231 if (in_pcb_checkstate(&inp->ip_inp.inp, WNT_STOPUSING, 1) != WNT_STOPUSING) {
4232 #ifdef INVARIANTS
4233 panic("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4234 #else
4235 SCTP_PRINTF("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4236 #endif
4237 }
4238 inp->ip_inp.inp.inp_socket->so_flags |= SOF_PCBCLEARING;
4239 #endif
4240 /*
4241 * if we have an address list the following will free the list of
4242 * ifaddr's that are set into this ep. Again macro limitations here,
4243 * since the LIST_FOREACH could be a bad idea.
4244 */
4245 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
4246 sctp_remove_laddr(laddr);
4247 }
4248
4249 #ifdef SCTP_TRACK_FREED_ASOCS
4250 /* TEMP CODE */
4251 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
4252 LIST_REMOVE(asoc, sctp_tcblist);
4253 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
4254 SCTP_DECR_ASOC_COUNT();
4255 }
4256 /* *** END TEMP CODE ****/
4257 #endif
4258 #ifdef SCTP_MVRF
4259 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
4260 #endif
4261 /* Now lets see about freeing the EP hash table. */
4262 if (inp->sctp_tcbhash != NULL) {
4263 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
4264 inp->sctp_tcbhash = NULL;
4265 }
4266 /* Now we must put the ep memory back into the zone pool */
4267 #if defined(__FreeBSD__)
4268 INP_LOCK_DESTROY(&inp->ip_inp.inp);
4269 #endif
4270 SCTP_INP_LOCK_DESTROY(inp);
4271 SCTP_INP_READ_DESTROY(inp);
4272 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
4273 #if !defined(__APPLE__)
4274 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
4275 SCTP_DECR_EP_COUNT();
4276 #else
4277 /* For Tiger, we will do this later... */
4278 #endif
4279 }
4280
4281
4282 struct sctp_nets *
4283 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
4284 {
4285 struct sctp_nets *net;
4286 /* locate the address */
4287 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4288 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
4289 return (net);
4290 }
4291 return (NULL);
4292 }
4293
4294
4295 int
4296 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
4297 {
4298 #ifdef __Panda__
4299 return (0);
4300 #else
4301 struct sctp_ifa *sctp_ifa;
4302 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
4303 if (sctp_ifa) {
4304 return (1);
4305 } else {
4306 return (0);
4307 }
4308 #endif
4309 }
4310
4311 /*
4312 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
4313 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
4314 * stats of stuff.
4315 */
4316 int
4317 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
4318 struct sctp_nets **netp, int set_scope, int from)
4319 {
4320 /*
4321 * The following is redundant to the same lines in the
4322 * sctp_aloc_assoc() but is needed since others call the add
4323 * address function
4324 */
4325 struct sctp_nets *net, *netfirst;
4326 int addr_inscope;
4327
4328 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
4329 from);
4330 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
4331
4332 netfirst = sctp_findnet(stcb, newaddr);
4333 if (netfirst) {
4334 /*
4335 * Lie and return ok, we don't want to make the association
4336 * go away for this behavior. It will happen in the TCP
4337 * model in a connected socket. It does not reach the hash
4338 * table until after the association is built so it can't be
4339 * found. Mark as reachable, since the initial creation will
4340 * have been cleared and the NOT_IN_ASSOC flag will have
4341 * been added... and we don't want to end up removing it
4342 * back out.
4343 */
4344 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
4345 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
4346 SCTP_ADDR_UNCONFIRMED);
4347 } else {
4348 netfirst->dest_state = SCTP_ADDR_REACHABLE;
4349 }
4350
4351 return (0);
4352 }
4353 addr_inscope = 1;
4354 switch (newaddr->sa_family) {
4355 #ifdef INET
4356 case AF_INET:
4357 {
4358 struct sockaddr_in *sin;
4359
4360 sin = (struct sockaddr_in *)newaddr;
4361 if (sin->sin_addr.s_addr == 0) {
4362 /* Invalid address */
4363 return (-1);
4364 }
4365 /* zero out the bzero area */
4366 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
4367
4368 /* assure len is set */
4369 #ifdef HAVE_SIN_LEN
4370 sin->sin_len = sizeof(struct sockaddr_in);
4371 #endif
4372 if (set_scope) {
4373 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
4374 stcb->asoc.scope.ipv4_local_scope = 1;
4375 #else
4376 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
4377 stcb->asoc.scope.ipv4_local_scope = 1;
4378 }
4379 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
4380 } else {
4381 /* Validate the address is in scope */
4382 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
4383 (stcb->asoc.scope.ipv4_local_scope == 0)) {
4384 addr_inscope = 0;
4385 }
4386 }
4387 break;
4388 }
4389 #endif
4390 #ifdef INET6
4391 case AF_INET6:
4392 {
4393 struct sockaddr_in6 *sin6;
4394
4395 sin6 = (struct sockaddr_in6 *)newaddr;
4396 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
4397 /* Invalid address */
4398 return (-1);
4399 }
4400 /* assure len is set */
4401 #ifdef HAVE_SIN6_LEN
4402 sin6->sin6_len = sizeof(struct sockaddr_in6);
4403 #endif
4404 if (set_scope) {
4405 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
4406 stcb->asoc.scope.loopback_scope = 1;
4407 stcb->asoc.scope.local_scope = 0;
4408 stcb->asoc.scope.ipv4_local_scope = 1;
4409 stcb->asoc.scope.site_scope = 1;
4410 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
4411 /*
4412 * If the new destination is a LINK_LOCAL we
4413 * must have common site scope. Don't set
4414 * the local scope since we may not share
4415 * all links, only loopback can do this.
4416 * Links on the local network would also be
4417 * on our private network for v4 too.
4418 */
4419 stcb->asoc.scope.ipv4_local_scope = 1;
4420 stcb->asoc.scope.site_scope = 1;
4421 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
4422 /*
4423 * If the new destination is SITE_LOCAL then
4424 * we must have site scope in common.
4425 */
4426 stcb->asoc.scope.site_scope = 1;
4427 }
4428 } else {
4429 /* Validate the address is in scope */
4430 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
4431 (stcb->asoc.scope.loopback_scope == 0)) {
4432 addr_inscope = 0;
4433 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
4434 (stcb->asoc.scope.local_scope == 0)) {
4435 addr_inscope = 0;
4436 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
4437 (stcb->asoc.scope.site_scope == 0)) {
4438 addr_inscope = 0;
4439 }
4440 }
4441 break;
4442 }
4443 #endif
4444 #if defined(__Userspace__)
4445 case AF_CONN:
4446 {
4447 struct sockaddr_conn *sconn;
4448
4449 sconn = (struct sockaddr_conn *)newaddr;
4450 if (sconn->sconn_addr == NULL) {
4451 /* Invalid address */
4452 return (-1);
4453 }
4454 #ifdef HAVE_SCONN_LEN
4455 sconn->sconn_len = sizeof(struct sockaddr_conn);
4456 #endif
4457 break;
4458 }
4459 #endif
4460 default:
4461 /* not supported family type */
4462 return (-1);
4463 }
4464 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
4465 if (net == NULL) {
4466 return (-1);
4467 }
4468 SCTP_INCR_RADDR_COUNT();
4469 bzero(net, sizeof(struct sctp_nets));
4470 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
4471 #ifdef HAVE_SA_LEN
4472 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
4473 #endif
4474 switch (newaddr->sa_family) {
4475 #ifdef INET
4476 case AF_INET:
4477 #ifndef HAVE_SA_LEN
4478 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in));
4479 #endif
4480 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
4481 break;
4482 #endif
4483 #ifdef INET6
4484 case AF_INET6:
4485 #ifndef HAVE_SA_LEN
4486 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in6));
4487 #endif
4488 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
4489 break;
4490 #endif
4491 #if defined(__Userspace__)
4492 case AF_CONN:
4493 #ifndef HAVE_SA_LEN
4494 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_conn));
4495 #endif
4496 ((struct sockaddr_conn *)&net->ro._l_addr)->sconn_port = stcb->rport;
4497 break;
4498 #endif
4499 default:
4500 break;
4501 }
4502 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
4503 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
4504 stcb->asoc.scope.loopback_scope = 1;
4505 stcb->asoc.scope.ipv4_local_scope = 1;
4506 stcb->asoc.scope.local_scope = 0;
4507 stcb->asoc.scope.site_scope = 1;
4508 addr_inscope = 1;
4509 }
4510 net->failure_threshold = stcb->asoc.def_net_failure;
4511 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
4512 if (addr_inscope == 0) {
4513 net->dest_state = (SCTP_ADDR_REACHABLE |
4514 SCTP_ADDR_OUT_OF_SCOPE);
4515 } else {
4516 if (from == SCTP_ADDR_IS_CONFIRMED)
4517 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
4518 net->dest_state = SCTP_ADDR_REACHABLE;
4519 else
4520 net->dest_state = SCTP_ADDR_REACHABLE |
4521 SCTP_ADDR_UNCONFIRMED;
4522 }
4523 /* We set this to 0, the timer code knows that
4524 * this means its an initial value
4525 */
4526 net->rto_needed = 1;
4527 net->RTO = 0;
4528 net->RTO_measured = 0;
4529 stcb->asoc.numnets++;
4530 net->ref_count = 1;
4531 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4532 net->port = stcb->asoc.port;
4533 net->dscp = stcb->asoc.default_dscp;
4534 #ifdef INET6
4535 net->flowlabel = stcb->asoc.default_flowlabel;
4536 #endif
4537 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4538 net->dest_state |= SCTP_ADDR_NOHB;
4539 } else {
4540 net->dest_state &= ~SCTP_ADDR_NOHB;
4541 }
4542 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4543 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4544 } else {
4545 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4546 }
4547 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4548 /* Init the timer structure */
4549 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4550 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4551 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4552
4553 /* Now generate a route for this guy */
4554 #ifdef INET6
4555 #ifdef SCTP_EMBEDDED_V6_SCOPE
4556 /* KAME hack: embed scopeid */
4557 if (newaddr->sa_family == AF_INET6) {
4558 struct sockaddr_in6 *sin6;
4559
4560 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4561 #if defined(__APPLE__)
4562 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
4563 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL);
4564 #else
4565 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL, NULL);
4566 #endif
4567 #elif defined(SCTP_KAME)
4568 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4569 #else
4570 (void)in6_embedscope(&sin6->sin6_addr, sin6);
4571 #endif
4572 #ifndef SCOPEDROUTING
4573 sin6->sin6_scope_id = 0;
4574 #endif
4575 }
4576 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4577 #endif
4578 SCTP_RTALLOC((sctp_route_t *)&net->ro, stcb->asoc.vrf_id);
4579
4580 #if !defined(__Userspace__)
4581 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4582 /* Get source address */
4583 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4584 stcb,
4585 (sctp_route_t *)&net->ro,
4586 net,
4587 0,
4588 stcb->asoc.vrf_id);
4589 /* Now get the interface MTU */
4590 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4591 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4592 }
4593 if (net->mtu > 0) {
4594 uint32_t rmtu;
4595
4596 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4597 if (rmtu == 0) {
4598 /* Start things off to match mtu of interface please. */
4599 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4600 net->ro.ro_rt, net->mtu);
4601 } else {
4602 /* we take the route mtu over the interface, since
4603 * the route may be leading out the loopback, or
4604 * a different interface.
4605 */
4606 net->mtu = rmtu;
4607 }
4608 }
4609 }
4610 #endif
4611 if (net->mtu == 0) {
4612 switch (newaddr->sa_family) {
4613 #ifdef INET
4614 case AF_INET:
4615 net->mtu = SCTP_DEFAULT_MTU;
4616 break;
4617 #endif
4618 #ifdef INET6
4619 case AF_INET6:
4620 net->mtu = 1280;
4621 break;
4622 #endif
4623 #if defined(__Userspace__)
4624 case AF_CONN:
4625 net->mtu = 1280;
4626 break;
4627 #endif
4628 default:
4629 break;
4630 }
4631 }
4632 if (net->port) {
4633 net->mtu -= (uint32_t)sizeof(struct udphdr);
4634 }
4635 if (from == SCTP_ALLOC_ASOC) {
4636 stcb->asoc.smallest_mtu = net->mtu;
4637 }
4638 if (stcb->asoc.smallest_mtu > net->mtu) {
4639 stcb->asoc.smallest_mtu = net->mtu;
4640 }
4641 #ifdef INET6
4642 #ifdef SCTP_EMBEDDED_V6_SCOPE
4643 if (newaddr->sa_family == AF_INET6) {
4644 struct sockaddr_in6 *sin6;
4645
4646 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4647 #ifdef SCTP_KAME
4648 (void)sa6_recoverscope(sin6);
4649 #else
4650 (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
4651 #endif /* SCTP_KAME */
4652 }
4653 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4654 #endif
4655
4656 /* JRS - Use the congestion control given in the CC module */
4657 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4658 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param)(stcb, net);
4659
4660 /*
4661 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4662 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4663 */
4664 net->find_pseudo_cumack = 1;
4665 net->find_rtx_pseudo_cumack = 1;
4666 net->src_addr_selected = 0;
4667 #if defined(__FreeBSD__)
4668 /* Choose an initial flowid. */
4669 net->flowid = stcb->asoc.my_vtag ^
4670 ntohs(stcb->rport) ^
4671 ntohs(stcb->sctp_ep->sctp_lport);
4672 #ifdef INVARIANTS
4673 net->flowidset = 1;
4674 #endif
4675 #endif
4676 if (netp) {
4677 *netp = net;
4678 }
4679 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4680 if (net->ro.ro_rt == NULL) {
4681 /* Since we have no route put it at the back */
4682 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4683 } else if (netfirst == NULL) {
4684 /* We are the first one in the pool. */
4685 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4686 } else if (netfirst->ro.ro_rt == NULL) {
4687 /*
4688 * First one has NO route. Place this one ahead of the first
4689 * one.
4690 */
4691 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4692 #ifndef __Panda__
4693 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4694 /*
4695 * This one has a different interface than the one at the
4696 * top of the list. Place it ahead.
4697 */
4698 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4699 #endif
4700 } else {
4701 /*
4702 * Ok we have the same interface as the first one. Move
4703 * forward until we find either a) one with a NULL route...
4704 * insert ahead of that b) one with a different ifp.. insert
4705 * after that. c) end of the list.. insert at the tail.
4706 */
4707 struct sctp_nets *netlook;
4708
4709 do {
4710 netlook = TAILQ_NEXT(netfirst, sctp_next);
4711 if (netlook == NULL) {
4712 /* End of the list */
4713 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4714 break;
4715 } else if (netlook->ro.ro_rt == NULL) {
4716 /* next one has NO route */
4717 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4718 break;
4719 }
4720 #ifndef __Panda__
4721 else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp)
4722 #else
4723 else
4724 #endif
4725 {
4726 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4727 net, sctp_next);
4728 break;
4729 }
4730 #ifndef __Panda__
4731 /* Shift forward */
4732 netfirst = netlook;
4733 #endif
4734 } while (netlook != NULL);
4735 }
4736
4737 /* got to have a primary set */
4738 if (stcb->asoc.primary_destination == 0) {
4739 stcb->asoc.primary_destination = net;
4740 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4741 (net->ro.ro_rt) &&
4742 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4743 /* No route to current primary adopt new primary */
4744 stcb->asoc.primary_destination = net;
4745 }
4746 /* Validate primary is first */
4747 net = TAILQ_FIRST(&stcb->asoc.nets);
4748 if ((net != stcb->asoc.primary_destination) &&
4749 (stcb->asoc.primary_destination)) {
4750 /* first one on the list is NOT the primary
4751 * sctp_cmpaddr() is much more efficient if
4752 * the primary is the first on the list, make it
4753 * so.
4754 */
4755 TAILQ_REMOVE(&stcb->asoc.nets,
4756 stcb->asoc.primary_destination, sctp_next);
4757 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4758 stcb->asoc.primary_destination, sctp_next);
4759 }
4760 return (0);
4761 }
4762
4763
4764 static uint32_t
4765 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4766 {
4767 uint32_t id;
4768 struct sctpasochead *head;
4769 struct sctp_tcb *lstcb;
4770
4771 SCTP_INP_WLOCK(inp);
4772 try_again:
4773 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4774 /* TSNH */
4775 SCTP_INP_WUNLOCK(inp);
4776 return (0);
4777 }
4778 /*
4779 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4780 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4781 */
4782 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4783 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4784 }
4785 id = inp->sctp_associd_counter;
4786 inp->sctp_associd_counter++;
4787 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4788 if (lstcb) {
4789 goto try_again;
4790 }
4791 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4792 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4793 stcb->asoc.in_asocid_hash = 1;
4794 SCTP_INP_WUNLOCK(inp);
4795 return id;
4796 }
4797
4798 /*
4799 * allocate an association and add it to the endpoint. The caller must be
4800 * careful to add all additional addresses once they are know right away or
4801 * else the assoc will be may experience a blackout scenario.
4802 */
4803 struct sctp_tcb *
4804 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4805 int *error, uint32_t override_tag, uint32_t vrf_id,
4806 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
4807 struct thread *p
4808 #elif defined(__Windows__)
4809 PKTHREAD p
4810 #else
4811 #if defined(__Userspace__)
4812 /* __Userspace__ NULL proc is going to be passed here. See sctp_lower_sosend */
4813 #endif
4814 struct proc *p
4815 #endif
4816 )
4817 {
4818 /* note the p argument is only valid in unbound sockets */
4819
4820 struct sctp_tcb *stcb;
4821 struct sctp_association *asoc;
4822 struct sctpasochead *head;
4823 uint16_t rport;
4824 int err;
4825
4826 /*
4827 * Assumption made here: Caller has done a
4828 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4829 * address does not exist already.
4830 */
4831 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4832 /* Hit max assoc, sorry no more */
4833 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4834 *error = ENOBUFS;
4835 return (NULL);
4836 }
4837 if (firstaddr == NULL) {
4838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4839 *error = EINVAL;
4840 return (NULL);
4841 }
4842 SCTP_INP_RLOCK(inp);
4843 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4844 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4845 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4846 /*
4847 * If its in the TCP pool, its NOT allowed to create an
4848 * association. The parent listener needs to call
4849 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4850 * off, or connected one does this.. its an error.
4851 */
4852 SCTP_INP_RUNLOCK(inp);
4853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4854 *error = EINVAL;
4855 return (NULL);
4856 }
4857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4858 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4860 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4861 SCTP_INP_RUNLOCK(inp);
4862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4863 *error = EINVAL;
4864 return (NULL);
4865 }
4866 }
4867 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4868 #ifdef SCTP_DEBUG
4869 if (firstaddr) {
4870 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4871 switch (firstaddr->sa_family) {
4872 #ifdef INET
4873 case AF_INET:
4874 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4875 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4876 break;
4877 #endif
4878 #ifdef INET6
4879 case AF_INET6:
4880 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4881 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4882 break;
4883 #endif
4884 #if defined(__Userspace__)
4885 case AF_CONN:
4886 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4887 ntohs(((struct sockaddr_conn *)firstaddr)->sconn_port));
4888 break;
4889 #endif
4890 default:
4891 break;
4892 }
4893 } else {
4894 SCTPDBG(SCTP_DEBUG_PCB3,"None\n");
4895 }
4896 #endif /* SCTP_DEBUG */
4897 switch (firstaddr->sa_family) {
4898 #ifdef INET
4899 case AF_INET:
4900 {
4901 struct sockaddr_in *sin;
4902
4903 sin = (struct sockaddr_in *)firstaddr;
4904 if ((ntohs(sin->sin_port) == 0) ||
4905 (sin->sin_addr.s_addr == INADDR_ANY) ||
4906 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4907 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4908 /* Invalid address */
4909 SCTP_INP_RUNLOCK(inp);
4910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4911 *error = EINVAL;
4912 return (NULL);
4913 }
4914 rport = sin->sin_port;
4915 break;
4916 }
4917 #endif
4918 #ifdef INET6
4919 case AF_INET6:
4920 {
4921 struct sockaddr_in6 *sin6;
4922
4923 sin6 = (struct sockaddr_in6 *)firstaddr;
4924 if ((ntohs(sin6->sin6_port) == 0) ||
4925 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4926 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4927 /* Invalid address */
4928 SCTP_INP_RUNLOCK(inp);
4929 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4930 *error = EINVAL;
4931 return (NULL);
4932 }
4933 rport = sin6->sin6_port;
4934 break;
4935 }
4936 #endif
4937 #if defined(__Userspace__)
4938 case AF_CONN:
4939 {
4940 struct sockaddr_conn *sconn;
4941
4942 sconn = (struct sockaddr_conn *)firstaddr;
4943 if ((ntohs(sconn->sconn_port) == 0) ||
4944 (sconn->sconn_addr == NULL)) {
4945 /* Invalid address */
4946 SCTP_INP_RUNLOCK(inp);
4947 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4948 *error = EINVAL;
4949 return (NULL);
4950 }
4951 rport = sconn->sconn_port;
4952 break;
4953 }
4954 #endif
4955 default:
4956 /* not supported family type */
4957 SCTP_INP_RUNLOCK(inp);
4958 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4959 *error = EINVAL;
4960 return (NULL);
4961 }
4962 SCTP_INP_RUNLOCK(inp);
4963 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4964 /*
4965 * If you have not performed a bind, then we need to do the
4966 * ephemeral bind for you.
4967 */
4968 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4969 (struct sockaddr *)NULL,
4970 (struct sctp_ifa *)NULL,
4971 #ifndef __Panda__
4972 p
4973 #else
4974 (struct proc *)NULL
4975 #endif
4976 ))) {
4977 /* bind error, probably perm */
4978 *error = err;
4979 return (NULL);
4980 }
4981 }
4982 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4983 if (stcb == NULL) {
4984 /* out of memory? */
4985 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4986 *error = ENOMEM;
4987 return (NULL);
4988 }
4989 SCTP_INCR_ASOC_COUNT();
4990
4991 bzero(stcb, sizeof(*stcb));
4992 asoc = &stcb->asoc;
4993
4994 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4995 SCTP_TCB_LOCK_INIT(stcb);
4996 SCTP_TCB_SEND_LOCK_INIT(stcb);
4997 stcb->rport = rport;
4998 /* setup back pointer's */
4999 stcb->sctp_ep = inp;
5000 stcb->sctp_socket = inp->sctp_socket;
5001 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
5002 /* failed */
5003 SCTP_TCB_LOCK_DESTROY(stcb);
5004 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5005 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5006 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5007 SCTP_DECR_ASOC_COUNT();
5008 *error = err;
5009 return (NULL);
5010 }
5011 /* and the port */
5012 SCTP_INP_INFO_WLOCK();
5013 SCTP_INP_WLOCK(inp);
5014 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5015 /* inpcb freed while alloc going on */
5016 SCTP_TCB_LOCK_DESTROY(stcb);
5017 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5018 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5019 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5020 SCTP_INP_WUNLOCK(inp);
5021 SCTP_INP_INFO_WUNLOCK();
5022 SCTP_DECR_ASOC_COUNT();
5023 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5024 *error = EINVAL;
5025 return (NULL);
5026 }
5027 SCTP_TCB_LOCK(stcb);
5028
5029 /* now that my_vtag is set, add it to the hash */
5030 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
5031 /* put it in the bucket in the vtag hash of assoc's for the system */
5032 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
5033 SCTP_INP_INFO_WUNLOCK();
5034
5035 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
5036 /* failure.. memory error? */
5037 if (asoc->strmout) {
5038 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5039 asoc->strmout = NULL;
5040 }
5041 if (asoc->mapping_array) {
5042 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5043 asoc->mapping_array = NULL;
5044 }
5045 if (asoc->nr_mapping_array) {
5046 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5047 asoc->nr_mapping_array = NULL;
5048 }
5049 SCTP_DECR_ASOC_COUNT();
5050 SCTP_TCB_UNLOCK(stcb);
5051 SCTP_TCB_LOCK_DESTROY(stcb);
5052 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5053 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5054 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5055 SCTP_INP_WUNLOCK(inp);
5056 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
5057 *error = ENOBUFS;
5058 return (NULL);
5059 }
5060 /* Init all the timers */
5061 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
5062 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
5063 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
5064 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
5065 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
5066 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
5067 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
5068
5069 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
5070 /* now file the port under the hash as well */
5071 if (inp->sctp_tcbhash != NULL) {
5072 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
5073 inp->sctp_hashmark)];
5074 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
5075 }
5076 SCTP_INP_WUNLOCK(inp);
5077 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
5078 return (stcb);
5079 }
5080
5081
5082 void
5083 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
5084 {
5085 struct sctp_association *asoc;
5086
5087 asoc = &stcb->asoc;
5088 asoc->numnets--;
5089 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5090 if (net == asoc->primary_destination) {
5091 /* Reset primary */
5092 struct sctp_nets *lnet;
5093
5094 lnet = TAILQ_FIRST(&asoc->nets);
5095 /* Mobility adaptation
5096 Ideally, if deleted destination is the primary, it becomes
5097 a fast retransmission trigger by the subsequent SET PRIMARY.
5098 (by micchie)
5099 */
5100 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
5101 SCTP_MOBILITY_BASE) ||
5102 sctp_is_mobility_feature_on(stcb->sctp_ep,
5103 SCTP_MOBILITY_FASTHANDOFF)) {
5104 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
5105 if (asoc->deleted_primary != NULL) {
5106 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
5107 goto out;
5108 }
5109 asoc->deleted_primary = net;
5110 atomic_add_int(&net->ref_count, 1);
5111 memset(&net->lastsa, 0, sizeof(net->lastsa));
5112 memset(&net->lastsv, 0, sizeof(net->lastsv));
5113 sctp_mobility_feature_on(stcb->sctp_ep,
5114 SCTP_MOBILITY_PRIM_DELETED);
5115 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
5116 stcb->sctp_ep, stcb, NULL);
5117 }
5118 out:
5119 /* Try to find a confirmed primary */
5120 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
5121 }
5122 if (net == asoc->last_data_chunk_from) {
5123 /* Reset primary */
5124 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
5125 }
5126 if (net == asoc->last_control_chunk_from) {
5127 /* Clear net */
5128 asoc->last_control_chunk_from = NULL;
5129 }
5130 if (net == stcb->asoc.alternate) {
5131 sctp_free_remote_addr(stcb->asoc.alternate);
5132 stcb->asoc.alternate = NULL;
5133 }
5134 sctp_free_remote_addr(net);
5135 }
5136
5137 /*
5138 * remove a remote endpoint address from an association, it will fail if the
5139 * address does not exist.
5140 */
5141 int
5142 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
5143 {
5144 /*
5145 * Here we need to remove a remote address. This is quite simple, we
5146 * first find it in the list of address for the association
5147 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
5148 * on that item. Note we do not allow it to be removed if there are
5149 * no other addresses.
5150 */
5151 struct sctp_association *asoc;
5152 struct sctp_nets *net, *nnet;
5153
5154 asoc = &stcb->asoc;
5155
5156 /* locate the address */
5157 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5158 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
5159 continue;
5160 }
5161 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
5162 remaddr)) {
5163 /* we found the guy */
5164 if (asoc->numnets < 2) {
5165 /* Must have at LEAST two remote addresses */
5166 return (-1);
5167 } else {
5168 sctp_remove_net(stcb, net);
5169 return (0);
5170 }
5171 }
5172 }
5173 /* not found. */
5174 return (-2);
5175 }
5176
5177 void
5178 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5179 {
5180 struct sctpvtaghead *chain;
5181 struct sctp_tagblock *twait_block;
5182 int found = 0;
5183 int i;
5184
5185 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5186 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5187 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5188 if ((twait_block->vtag_block[i].v_tag == tag) &&
5189 (twait_block->vtag_block[i].lport == lport) &&
5190 (twait_block->vtag_block[i].rport == rport)) {
5191 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5192 twait_block->vtag_block[i].v_tag = 0;
5193 twait_block->vtag_block[i].lport = 0;
5194 twait_block->vtag_block[i].rport = 0;
5195 found = 1;
5196 break;
5197 }
5198 }
5199 if (found)
5200 break;
5201 }
5202 }
5203
5204 int
5205 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5206 {
5207 struct sctpvtaghead *chain;
5208 struct sctp_tagblock *twait_block;
5209 int found = 0;
5210 int i;
5211
5212 SCTP_INP_INFO_WLOCK();
5213 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5214 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5215 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5216 if ((twait_block->vtag_block[i].v_tag == tag) &&
5217 (twait_block->vtag_block[i].lport == lport) &&
5218 (twait_block->vtag_block[i].rport == rport)) {
5219 found = 1;
5220 break;
5221 }
5222 }
5223 if (found)
5224 break;
5225 }
5226 SCTP_INP_INFO_WUNLOCK();
5227 return (found);
5228 }
5229
5230
5231 void
5232 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
5233 {
5234 struct sctpvtaghead *chain;
5235 struct sctp_tagblock *twait_block;
5236 struct timeval now;
5237 int set, i;
5238
5239 if (time == 0) {
5240 /* Its disabled */
5241 return;
5242 }
5243 (void)SCTP_GETTIME_TIMEVAL(&now);
5244 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5245 set = 0;
5246 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5247 /* Block(s) present, lets find space, and expire on the fly */
5248 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5249 if ((twait_block->vtag_block[i].v_tag == 0) &&
5250 !set) {
5251 twait_block->vtag_block[i].tv_sec_at_expire =
5252 now.tv_sec + time;
5253 twait_block->vtag_block[i].v_tag = tag;
5254 twait_block->vtag_block[i].lport = lport;
5255 twait_block->vtag_block[i].rport = rport;
5256 set = 1;
5257 } else if ((twait_block->vtag_block[i].v_tag) &&
5258 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
5259 /* Audit expires this guy */
5260 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5261 twait_block->vtag_block[i].v_tag = 0;
5262 twait_block->vtag_block[i].lport = 0;
5263 twait_block->vtag_block[i].rport = 0;
5264 if (set == 0) {
5265 /* Reuse it for my new tag */
5266 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
5267 twait_block->vtag_block[i].v_tag = tag;
5268 twait_block->vtag_block[i].lport = lport;
5269 twait_block->vtag_block[i].rport = rport;
5270 set = 1;
5271 }
5272 }
5273 }
5274 if (set) {
5275 /*
5276 * We only do up to the block where we can
5277 * place our tag for audits
5278 */
5279 break;
5280 }
5281 }
5282 /* Need to add a new block to chain */
5283 if (!set) {
5284 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
5285 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
5286 if (twait_block == NULL) {
5287 #ifdef INVARIANTS
5288 panic("Can not alloc tagblock");
5289 #endif
5290 return;
5291 }
5292 memset(twait_block, 0, sizeof(struct sctp_tagblock));
5293 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
5294 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
5295 twait_block->vtag_block[0].v_tag = tag;
5296 twait_block->vtag_block[0].lport = lport;
5297 twait_block->vtag_block[0].rport = rport;
5298 }
5299 }
5300
5301
5302 #ifdef __Panda__
5303 void panda_wakeup_socket(struct socket *so);
5304 #endif
5305
5306 /*-
5307 * Free the association after un-hashing the remote port. This
5308 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
5309 * expect that the input to this function IS a locked TCB.
5310 * It will return 0, if it did NOT destroy the association (instead
5311 * it unlocks it. It will return NON-zero if it either destroyed the
5312 * association OR the association is already destroyed.
5313 */
5314 int
5315 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
5316 {
5317 int i;
5318 struct sctp_association *asoc;
5319 struct sctp_nets *net, *nnet;
5320 struct sctp_laddr *laddr, *naddr;
5321 struct sctp_tmit_chunk *chk, *nchk;
5322 struct sctp_asconf_addr *aparam, *naparam;
5323 struct sctp_asconf_ack *aack, *naack;
5324 struct sctp_stream_reset_list *strrst, *nstrrst;
5325 struct sctp_queued_to_read *sq, *nsq;
5326 struct sctp_stream_queue_pending *sp, *nsp;
5327 sctp_sharedkey_t *shared_key, *nshared_key;
5328 struct socket *so;
5329
5330 /* first, lets purge the entry from the hash table. */
5331 #if defined(__APPLE__)
5332 sctp_lock_assert(SCTP_INP_SO(inp));
5333 #endif
5334
5335 #ifdef SCTP_LOG_CLOSING
5336 sctp_log_closing(inp, stcb, 6);
5337 #endif
5338 if (stcb->asoc.state == 0) {
5339 #ifdef SCTP_LOG_CLOSING
5340 sctp_log_closing(inp, NULL, 7);
5341 #endif
5342 /* there is no asoc, really TSNH :-0 */
5343 return (1);
5344 }
5345 if (stcb->asoc.alternate) {
5346 sctp_free_remote_addr(stcb->asoc.alternate);
5347 stcb->asoc.alternate = NULL;
5348 }
5349 #if !defined(__APPLE__) /* TEMP: moved to below */
5350 /* TEMP CODE */
5351 if (stcb->freed_from_where == 0) {
5352 /* Only record the first place free happened from */
5353 stcb->freed_from_where = from_location;
5354 }
5355 /* TEMP CODE */
5356 #endif
5357
5358 asoc = &stcb->asoc;
5359 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5360 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5361 /* nothing around */
5362 so = NULL;
5363 else
5364 so = inp->sctp_socket;
5365
5366 /*
5367 * We used timer based freeing if a reader or writer is in the way.
5368 * So we first check if we are actually being called from a timer,
5369 * if so we abort early if a reader or writer is still in the way.
5370 */
5371 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
5372 (from_inpcbfree == SCTP_NORMAL_PROC)) {
5373 /*
5374 * is it the timer driving us? if so are the reader/writers
5375 * gone?
5376 */
5377 if (stcb->asoc.refcnt) {
5378 /* nope, reader or writer in the way */
5379 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5380 /* no asoc destroyed */
5381 SCTP_TCB_UNLOCK(stcb);
5382 #ifdef SCTP_LOG_CLOSING
5383 sctp_log_closing(inp, stcb, 8);
5384 #endif
5385 return (0);
5386 }
5387 }
5388 /* now clean up any other timers */
5389 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5390 asoc->dack_timer.self = NULL;
5391 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5392 /*-
5393 * For stream reset we don't blast this unless
5394 * it is a str-reset timer, it might be the
5395 * free-asoc timer which we DON'T want to
5396 * disturb.
5397 */
5398 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
5399 asoc->strreset_timer.self = NULL;
5400 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5401 asoc->asconf_timer.self = NULL;
5402 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5403 asoc->autoclose_timer.self = NULL;
5404 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5405 asoc->shut_guard_timer.self = NULL;
5406 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5407 asoc->delayed_event_timer.self = NULL;
5408 /* Mobility adaptation */
5409 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
5410 asoc->delete_prim_timer.self = NULL;
5411 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5412 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5413 net->rxt_timer.self = NULL;
5414 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5415 net->pmtu_timer.self = NULL;
5416 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5417 net->hb_timer.self = NULL;
5418 }
5419 /* Now the read queue needs to be cleaned up (only once) */
5420 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
5421 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
5422 SCTP_INP_READ_LOCK(inp);
5423 TAILQ_FOREACH(sq, &inp->read_queue, next) {
5424 if (sq->stcb == stcb) {
5425 sq->do_not_ref_stcb = 1;
5426 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
5427 /* If there is no end, there never
5428 * will be now.
5429 */
5430 if (sq->end_added == 0) {
5431 /* Held for PD-API clear that. */
5432 sq->pdapi_aborted = 1;
5433 sq->held_length = 0;
5434 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
5435 /*
5436 * Need to add a PD-API aborted indication.
5437 * Setting the control_pdapi assures that it will
5438 * be added right after this msg.
5439 */
5440 uint32_t strseq;
5441 stcb->asoc.control_pdapi = sq;
5442 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
5443 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
5444 stcb,
5445 SCTP_PARTIAL_DELIVERY_ABORTED,
5446 (void *)&strseq,
5447 SCTP_SO_LOCKED);
5448 stcb->asoc.control_pdapi = NULL;
5449 }
5450 }
5451 /* Add an end to wake them */
5452 sq->end_added = 1;
5453 }
5454 }
5455 SCTP_INP_READ_UNLOCK(inp);
5456 if (stcb->block_entry) {
5457 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
5458 stcb->block_entry->error = ECONNRESET;
5459 stcb->block_entry = NULL;
5460 }
5461 }
5462 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
5463 /* Someone holds a reference OR the socket is unaccepted yet.
5464 */
5465 if ((stcb->asoc.refcnt) ||
5466 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5467 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
5468 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
5469 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5470 }
5471 SCTP_TCB_UNLOCK(stcb);
5472 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5473 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5474 /* nothing around */
5475 so = NULL;
5476 if (so) {
5477 /* Wake any reader/writers */
5478 sctp_sorwakeup(inp, so);
5479 sctp_sowwakeup(inp, so);
5480 }
5481
5482 #ifdef SCTP_LOG_CLOSING
5483 sctp_log_closing(inp, stcb, 9);
5484 #endif
5485 /* no asoc destroyed */
5486 return (0);
5487 }
5488 #ifdef SCTP_LOG_CLOSING
5489 sctp_log_closing(inp, stcb, 10);
5490 #endif
5491 /* When I reach here, no others want
5492 * to kill the assoc yet.. and I own
5493 * the lock. Now its possible an abort
5494 * comes in when I do the lock exchange
5495 * below to grab all the locks to do
5496 * the final take out. to prevent this
5497 * we increment the count, which will
5498 * start a timer and blow out above thus
5499 * assuring us that we hold exclusive
5500 * killing of the asoc. Note that
5501 * after getting back the TCB lock
5502 * we will go ahead and increment the
5503 * counter back up and stop any timer
5504 * a passing stranger may have started :-S
5505 */
5506 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5507 atomic_add_int(&stcb->asoc.refcnt, 1);
5508
5509 SCTP_TCB_UNLOCK(stcb);
5510 SCTP_INP_INFO_WLOCK();
5511 SCTP_INP_WLOCK(inp);
5512 SCTP_TCB_LOCK(stcb);
5513 }
5514 /* Double check the GONE flag */
5515 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5516 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5517 /* nothing around */
5518 so = NULL;
5519
5520 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
5521 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
5522 /*
5523 * For TCP type we need special handling when we are
5524 * connected. We also include the peel'ed off ones to.
5525 */
5526 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
5527 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
5528 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
5529 if (so) {
5530 SOCK_LOCK(so);
5531 if (so->so_rcv.sb_cc == 0) {
5532 so->so_state &= ~(SS_ISCONNECTING |
5533 SS_ISDISCONNECTING |
5534 SS_ISCONFIRMING |
5535 SS_ISCONNECTED);
5536 }
5537 #if defined(__APPLE__)
5538 socantrcvmore(so);
5539 #else
5540 socantrcvmore_locked(so);
5541 #endif
5542 sctp_sowwakeup(inp, so);
5543 sctp_sorwakeup(inp, so);
5544 SCTP_SOWAKEUP(so);
5545 }
5546 }
5547 }
5548
5549 /* Make it invalid too, that way if its
5550 * about to run it will abort and return.
5551 */
5552 /* re-increment the lock */
5553 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5554 atomic_add_int(&stcb->asoc.refcnt, -1);
5555 }
5556 if (stcb->asoc.refcnt) {
5557 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
5558 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5559 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5560 SCTP_INP_INFO_WUNLOCK();
5561 SCTP_INP_WUNLOCK(inp);
5562 }
5563 SCTP_TCB_UNLOCK(stcb);
5564 return (0);
5565 }
5566 asoc->state = 0;
5567 if (inp->sctp_tcbhash) {
5568 LIST_REMOVE(stcb, sctp_tcbhash);
5569 }
5570 if (stcb->asoc.in_asocid_hash) {
5571 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5572 }
5573 /* Now lets remove it from the list of ALL associations in the EP */
5574 LIST_REMOVE(stcb, sctp_tcblist);
5575 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5576 SCTP_INP_INCR_REF(inp);
5577 SCTP_INP_WUNLOCK(inp);
5578 }
5579 /* pull from vtag hash */
5580 LIST_REMOVE(stcb, sctp_asocs);
5581 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
5582 inp->sctp_lport, stcb->rport);
5583
5584 /* Now restop the timers to be sure
5585 * this is paranoia at is finest!
5586 */
5587 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5588 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5589 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5590 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5591 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5592 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5593 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5594 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5595 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5596 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5597 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5598 }
5599
5600 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
5601 /*
5602 * The chunk lists and such SHOULD be empty but we check them just
5603 * in case.
5604 */
5605 /* anything on the wheel needs to be removed */
5606 for (i = 0; i < asoc->streamoutcnt; i++) {
5607 struct sctp_stream_out *outs;
5608
5609 outs = &asoc->strmout[i];
5610 /* now clean up any chunks here */
5611 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5612 TAILQ_REMOVE(&outs->outqueue, sp, next);
5613 sctp_free_spbufspace(stcb, asoc, sp);
5614 if (sp->data) {
5615 if (so) {
5616 /* Still an open socket - report */
5617 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5618 0, (void *)sp, SCTP_SO_LOCKED);
5619 }
5620 if (sp->data) {
5621 sctp_m_freem(sp->data);
5622 sp->data = NULL;
5623 sp->tail_mbuf = NULL;
5624 sp->length = 0;
5625 }
5626 }
5627 if (sp->net) {
5628 sctp_free_remote_addr(sp->net);
5629 sp->net = NULL;
5630 }
5631 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5632 }
5633 }
5634 /*sa_ignore FREED_MEMORY*/
5635 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5636 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5637 SCTP_FREE(strrst, SCTP_M_STRESET);
5638 }
5639 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5640 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5641 if (sq->data) {
5642 sctp_m_freem(sq->data);
5643 sq->data = NULL;
5644 }
5645 sctp_free_remote_addr(sq->whoFrom);
5646 sq->whoFrom = NULL;
5647 sq->stcb = NULL;
5648 /* Free the ctl entry */
5649 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5650 SCTP_DECR_READQ_COUNT();
5651 /*sa_ignore FREED_MEMORY*/
5652 }
5653 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5654 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5655 if (chk->data) {
5656 sctp_m_freem(chk->data);
5657 chk->data = NULL;
5658 }
5659 if (chk->holds_key_ref)
5660 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5661 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5662 SCTP_DECR_CHK_COUNT();
5663 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5664 asoc->free_chunk_cnt--;
5665 /*sa_ignore FREED_MEMORY*/
5666 }
5667 /* pending send queue SHOULD be empty */
5668 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5669 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5670 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5671 #ifdef INVARIANTS
5672 } else {
5673 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5674 #endif
5675 }
5676 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5677 if (chk->data) {
5678 if (so) {
5679 /* Still a socket? */
5680 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5681 0, chk, SCTP_SO_LOCKED);
5682 }
5683 if (chk->data) {
5684 sctp_m_freem(chk->data);
5685 chk->data = NULL;
5686 }
5687 }
5688 if (chk->holds_key_ref)
5689 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5690 if (chk->whoTo) {
5691 sctp_free_remote_addr(chk->whoTo);
5692 chk->whoTo = NULL;
5693 }
5694 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5695 SCTP_DECR_CHK_COUNT();
5696 /*sa_ignore FREED_MEMORY*/
5697 }
5698 /* sent queue SHOULD be empty */
5699 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5700 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5701 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5702 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5703 #ifdef INVARIANTS
5704 } else {
5705 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5706 #endif
5707 }
5708 }
5709 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5710 if (chk->data) {
5711 if (so) {
5712 /* Still a socket? */
5713 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5714 0, chk, SCTP_SO_LOCKED);
5715 }
5716 if (chk->data) {
5717 sctp_m_freem(chk->data);
5718 chk->data = NULL;
5719 }
5720 }
5721 if (chk->holds_key_ref)
5722 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5723 sctp_free_remote_addr(chk->whoTo);
5724 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5725 SCTP_DECR_CHK_COUNT();
5726 /*sa_ignore FREED_MEMORY*/
5727 }
5728 #ifdef INVARIANTS
5729 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5730 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5731 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5732 }
5733 }
5734 #endif
5735 /* control queue MAY not be empty */
5736 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5737 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5738 if (chk->data) {
5739 sctp_m_freem(chk->data);
5740 chk->data = NULL;
5741 }
5742 if (chk->holds_key_ref)
5743 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5744 sctp_free_remote_addr(chk->whoTo);
5745 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5746 SCTP_DECR_CHK_COUNT();
5747 /*sa_ignore FREED_MEMORY*/
5748 }
5749 /* ASCONF queue MAY not be empty */
5750 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5751 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5752 if (chk->data) {
5753 sctp_m_freem(chk->data);
5754 chk->data = NULL;
5755 }
5756 if (chk->holds_key_ref)
5757 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5758 sctp_free_remote_addr(chk->whoTo);
5759 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5760 SCTP_DECR_CHK_COUNT();
5761 /*sa_ignore FREED_MEMORY*/
5762 }
5763 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5764 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5765 if (chk->data) {
5766 sctp_m_freem(chk->data);
5767 chk->data = NULL;
5768 }
5769 if (chk->holds_key_ref)
5770 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5771 sctp_free_remote_addr(chk->whoTo);
5772 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5773 SCTP_DECR_CHK_COUNT();
5774 /*sa_ignore FREED_MEMORY*/
5775 }
5776
5777 if (asoc->mapping_array) {
5778 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5779 asoc->mapping_array = NULL;
5780 }
5781 if (asoc->nr_mapping_array) {
5782 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5783 asoc->nr_mapping_array = NULL;
5784 }
5785 /* the stream outs */
5786 if (asoc->strmout) {
5787 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5788 asoc->strmout = NULL;
5789 }
5790 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5791 if (asoc->strmin) {
5792 struct sctp_queued_to_read *ctl, *nctl;
5793
5794 for (i = 0; i < asoc->streamincnt; i++) {
5795 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5796 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5797 sctp_free_remote_addr(ctl->whoFrom);
5798 if (ctl->data) {
5799 sctp_m_freem(ctl->data);
5800 ctl->data = NULL;
5801 }
5802 /*
5803 * We don't free the address here
5804 * since all the net's were freed
5805 * above.
5806 */
5807 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5808 SCTP_DECR_READQ_COUNT();
5809 }
5810 }
5811 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5812 asoc->strmin = NULL;
5813 }
5814 asoc->streamincnt = 0;
5815 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5816 #ifdef INVARIANTS
5817 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5818 panic("no net's left alloc'ed, or list points to itself");
5819 }
5820 #endif
5821 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5822 sctp_free_remote_addr(net);
5823 }
5824 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5825 /*sa_ignore FREED_MEMORY*/
5826 sctp_remove_laddr(laddr);
5827 }
5828
5829 /* pending asconf (address) parameters */
5830 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5831 /*sa_ignore FREED_MEMORY*/
5832 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5833 SCTP_FREE(aparam,SCTP_M_ASC_ADDR);
5834 }
5835 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5836 /*sa_ignore FREED_MEMORY*/
5837 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5838 if (aack->data != NULL) {
5839 sctp_m_freem(aack->data);
5840 }
5841 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5842 }
5843 /* clean up auth stuff */
5844 if (asoc->local_hmacs)
5845 sctp_free_hmaclist(asoc->local_hmacs);
5846 if (asoc->peer_hmacs)
5847 sctp_free_hmaclist(asoc->peer_hmacs);
5848
5849 if (asoc->local_auth_chunks)
5850 sctp_free_chunklist(asoc->local_auth_chunks);
5851 if (asoc->peer_auth_chunks)
5852 sctp_free_chunklist(asoc->peer_auth_chunks);
5853
5854 sctp_free_authinfo(&asoc->authinfo);
5855
5856 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5857 LIST_REMOVE(shared_key, next);
5858 sctp_free_sharedkey(shared_key);
5859 /*sa_ignore FREED_MEMORY*/
5860 }
5861
5862 /* Insert new items here :> */
5863
5864 /* Get rid of LOCK */
5865 SCTP_TCB_UNLOCK(stcb);
5866 SCTP_TCB_LOCK_DESTROY(stcb);
5867 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5868 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5869 SCTP_INP_INFO_WUNLOCK();
5870 SCTP_INP_RLOCK(inp);
5871 }
5872 #if defined(__APPLE__) /* TEMP CODE */
5873 stcb->freed_from_where = from_location;
5874 #endif
5875 #ifdef SCTP_TRACK_FREED_ASOCS
5876 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5877 /* now clean up the tasoc itself */
5878 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5879 SCTP_DECR_ASOC_COUNT();
5880 } else {
5881 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5882 }
5883 #else
5884 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5885 SCTP_DECR_ASOC_COUNT();
5886 #endif
5887 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5888 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5889 /* If its NOT the inp_free calling us AND
5890 * sctp_close as been called, we
5891 * call back...
5892 */
5893 SCTP_INP_RUNLOCK(inp);
5894 /* This will start the kill timer (if we are
5895 * the last one) since we hold an increment yet. But
5896 * this is the only safe way to do this
5897 * since otherwise if the socket closes
5898 * at the same time we are here we might
5899 * collide in the cleanup.
5900 */
5901 sctp_inpcb_free(inp,
5902 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5903 SCTP_CALLED_DIRECTLY_NOCMPSET);
5904 SCTP_INP_DECR_REF(inp);
5905 goto out_of;
5906 } else {
5907 /* The socket is still open. */
5908 SCTP_INP_DECR_REF(inp);
5909 }
5910 }
5911 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5912 SCTP_INP_RUNLOCK(inp);
5913 }
5914 out_of:
5915 /* destroyed the asoc */
5916 #ifdef SCTP_LOG_CLOSING
5917 sctp_log_closing(inp, NULL, 11);
5918 #endif
5919 return (1);
5920 }
5921
5922
5923
5924 /*
5925 * determine if a destination is "reachable" based upon the addresses bound
5926 * to the current endpoint (e.g. only v4 or v6 currently bound)
5927 */
5928 /*
5929 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5930 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5931 * types bound as its endpoint
5932 */
5933 int
5934 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5935 {
5936 struct sctp_inpcb *inp;
5937 int answer;
5938
5939 /*
5940 * No locks here, the TCB, in all cases is already locked and an
5941 * assoc is up. There is either a INP lock by the caller applied (in
5942 * asconf case when deleting an address) or NOT in the HB case,
5943 * however if HB then the INP increment is up and the INP will not
5944 * be removed (on top of the fact that we have a TCB lock). So we
5945 * only want to read the sctp_flags, which is either bound-all or
5946 * not.. no protection needed since once an assoc is up you can't be
5947 * changing your binding.
5948 */
5949 inp = stcb->sctp_ep;
5950 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5951 /* if bound all, destination is not restricted */
5952 /*
5953 * RRS: Question during lock work: Is this correct? If you
5954 * are bound-all you still might need to obey the V4--V6
5955 * flags??? IMO this bound-all stuff needs to be removed!
5956 */
5957 return (1);
5958 }
5959 /* NOTE: all "scope" checks are done when local addresses are added */
5960 switch (destaddr->sa_family) {
5961 #ifdef INET6
5962 case AF_INET6:
5963 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
5964 answer = inp->inp_vflag & INP_IPV6;
5965 #else
5966 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5967 #endif
5968 break;
5969 #endif
5970 #ifdef INET
5971 case AF_INET:
5972 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
5973 answer = inp->inp_vflag & INP_IPV4;
5974 #else
5975 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5976 #endif
5977 break;
5978 #endif
5979 #if defined(__Userspace__)
5980 case AF_CONN:
5981 answer = inp->ip_inp.inp.inp_vflag & INP_CONN;
5982 break;
5983 #endif
5984 default:
5985 /* invalid family, so it's unreachable */
5986 answer = 0;
5987 break;
5988 }
5989 return (answer);
5990 }
5991
5992 /*
5993 * update the inp_vflags on an endpoint
5994 */
5995 static void
5996 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5997 {
5998 struct sctp_laddr *laddr;
5999
6000 /* first clear the flag */
6001 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6002 inp->inp_vflag = 0;
6003 #else
6004 inp->ip_inp.inp.inp_vflag = 0;
6005 #endif
6006 /* set the flag based on addresses on the ep list */
6007 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6008 if (laddr->ifa == NULL) {
6009 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
6010 __FUNCTION__);
6011 continue;
6012 }
6013
6014 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
6015 continue;
6016 }
6017 switch (laddr->ifa->address.sa.sa_family) {
6018 #ifdef INET6
6019 case AF_INET6:
6020 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6021 inp->inp_vflag |= INP_IPV6;
6022 #else
6023 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6024 #endif
6025 break;
6026 #endif
6027 #ifdef INET
6028 case AF_INET:
6029 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6030 inp->inp_vflag |= INP_IPV4;
6031 #else
6032 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6033 #endif
6034 break;
6035 #endif
6036 #if defined(__Userspace__)
6037 case AF_CONN:
6038 inp->ip_inp.inp.inp_vflag |= INP_CONN;
6039 break;
6040 #endif
6041 default:
6042 break;
6043 }
6044 }
6045 }
6046
6047 /*
6048 * Add the address to the endpoint local address list There is nothing to be
6049 * done if we are bound to all addresses
6050 */
6051 void
6052 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
6053 {
6054 struct sctp_laddr *laddr;
6055 int fnd, error = 0;
6056
6057 fnd = 0;
6058
6059 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6060 /* You are already bound to all. You have it already */
6061 return;
6062 }
6063 #ifdef INET6
6064 if (ifa->address.sa.sa_family == AF_INET6) {
6065 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6066 /* Can't bind a non-useable addr. */
6067 return;
6068 }
6069 }
6070 #endif
6071 /* first, is it already present? */
6072 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6073 if (laddr->ifa == ifa) {
6074 fnd = 1;
6075 break;
6076 }
6077 }
6078
6079 if (fnd == 0) {
6080 /* Not in the ep list */
6081 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
6082 if (error != 0)
6083 return;
6084 inp->laddr_count++;
6085 /* update inp_vflag flags */
6086 switch (ifa->address.sa.sa_family) {
6087 #ifdef INET6
6088 case AF_INET6:
6089 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6090 inp->inp_vflag |= INP_IPV6;
6091 #else
6092 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6093 #endif
6094 break;
6095 #endif
6096 #ifdef INET
6097 case AF_INET:
6098 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6099 inp->inp_vflag |= INP_IPV4;
6100 #else
6101 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6102 #endif
6103 break;
6104 #endif
6105 #if defined(__Userspace__)
6106 case AF_CONN:
6107 inp->ip_inp.inp.inp_vflag |= INP_CONN;
6108 break;
6109 #endif
6110 default:
6111 break;
6112 }
6113 }
6114 return;
6115 }
6116
6117
6118 /*
6119 * select a new (hopefully reachable) destination net (should only be used
6120 * when we deleted an ep addr that is the only usable source address to reach
6121 * the destination net)
6122 */
6123 static void
6124 sctp_select_primary_destination(struct sctp_tcb *stcb)
6125 {
6126 struct sctp_nets *net;
6127
6128 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6129 /* for now, we'll just pick the first reachable one we find */
6130 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
6131 continue;
6132 if (sctp_destination_is_reachable(stcb,
6133 (struct sockaddr *)&net->ro._l_addr)) {
6134 /* found a reachable destination */
6135 stcb->asoc.primary_destination = net;
6136 }
6137 }
6138 /* I can't there from here! ...we're gonna die shortly... */
6139 }
6140
6141
6142 /*
6143 * Delete the address from the endpoint local address list There is nothing
6144 * to be done if we are bound to all addresses
6145 */
6146 void
6147 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
6148 {
6149 struct sctp_laddr *laddr;
6150 int fnd;
6151
6152 fnd = 0;
6153 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6154 /* You are already bound to all. You have it already */
6155 return;
6156 }
6157 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6158 if (laddr->ifa == ifa) {
6159 fnd = 1;
6160 break;
6161 }
6162 }
6163 if (fnd && (inp->laddr_count < 2)) {
6164 /* can't delete unless there are at LEAST 2 addresses */
6165 return;
6166 }
6167 if (fnd) {
6168 /*
6169 * clean up any use of this address go through our
6170 * associations and clear any last_used_address that match
6171 * this one for each assoc, see if a new primary_destination
6172 * is needed
6173 */
6174 struct sctp_tcb *stcb;
6175
6176 /* clean up "next_addr_touse" */
6177 if (inp->next_addr_touse == laddr)
6178 /* delete this address */
6179 inp->next_addr_touse = NULL;
6180
6181 /* clean up "last_used_address" */
6182 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6183 struct sctp_nets *net;
6184 SCTP_TCB_LOCK(stcb);
6185 if (stcb->asoc.last_used_address == laddr)
6186 /* delete this address */
6187 stcb->asoc.last_used_address = NULL;
6188 /* Now spin through all the nets and purge any ref to laddr */
6189 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6190 if (net->ro._s_addr &&
6191 (net->ro._s_addr->ifa == laddr->ifa)) {
6192 /* Yep, purge src address selected */
6193 sctp_rtentry_t *rt;
6194
6195 /* delete this address if cached */
6196 rt = net->ro.ro_rt;
6197 if (rt != NULL) {
6198 RTFREE(rt);
6199 net->ro.ro_rt = NULL;
6200 }
6201 sctp_free_ifa(net->ro._s_addr);
6202 net->ro._s_addr = NULL;
6203 net->src_addr_selected = 0;
6204 }
6205 }
6206 SCTP_TCB_UNLOCK(stcb);
6207 } /* for each tcb */
6208 /* remove it from the ep list */
6209 sctp_remove_laddr(laddr);
6210 inp->laddr_count--;
6211 /* update inp_vflag flags */
6212 sctp_update_ep_vflag(inp);
6213 }
6214 return;
6215 }
6216
6217 /*
6218 * Add the address to the TCB local address restricted list.
6219 * This is a "pending" address list (eg. addresses waiting for an
6220 * ASCONF-ACK response) and cannot be used as a valid source address.
6221 */
6222 void
6223 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6224 {
6225 struct sctp_laddr *laddr;
6226 struct sctpladdr *list;
6227
6228 /*
6229 * Assumes TCB is locked.. and possibly the INP. May need to
6230 * confirm/fix that if we need it and is not the case.
6231 */
6232 list = &stcb->asoc.sctp_restricted_addrs;
6233
6234 #ifdef INET6
6235 if (ifa->address.sa.sa_family == AF_INET6) {
6236 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6237 /* Can't bind a non-existent addr. */
6238 return;
6239 }
6240 }
6241 #endif
6242 /* does the address already exist? */
6243 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
6244 if (laddr->ifa == ifa) {
6245 return;
6246 }
6247 }
6248
6249 /* add to the list */
6250 (void)sctp_insert_laddr(list, ifa, 0);
6251 return;
6252 }
6253
6254 /*
6255 * insert an laddr entry with the given ifa for the desired list
6256 */
6257 int
6258 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
6259 {
6260 struct sctp_laddr *laddr;
6261
6262 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
6263 if (laddr == NULL) {
6264 /* out of memory? */
6265 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
6266 return (EINVAL);
6267 }
6268 SCTP_INCR_LADDR_COUNT();
6269 bzero(laddr, sizeof(*laddr));
6270 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
6271 laddr->ifa = ifa;
6272 laddr->action = act;
6273 atomic_add_int(&ifa->refcount, 1);
6274 /* insert it */
6275 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
6276
6277 return (0);
6278 }
6279
6280 /*
6281 * Remove an laddr entry from the local address list (on an assoc)
6282 */
6283 void
6284 sctp_remove_laddr(struct sctp_laddr *laddr)
6285 {
6286
6287 /* remove from the list */
6288 LIST_REMOVE(laddr, sctp_nxt_addr);
6289 sctp_free_ifa(laddr->ifa);
6290 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
6291 SCTP_DECR_LADDR_COUNT();
6292 }
6293
6294 /*
6295 * Remove a local address from the TCB local address restricted list
6296 */
6297 void
6298 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6299 {
6300 struct sctp_inpcb *inp;
6301 struct sctp_laddr *laddr;
6302
6303 /*
6304 * This is called by asconf work. It is assumed that a) The TCB is
6305 * locked and b) The INP is locked. This is true in as much as I can
6306 * trace through the entry asconf code where I did these locks.
6307 * Again, the ASCONF code is a bit different in that it does lock
6308 * the INP during its work often times. This must be since we don't
6309 * want other proc's looking up things while what they are looking
6310 * up is changing :-D
6311 */
6312
6313 inp = stcb->sctp_ep;
6314 /* if subset bound and don't allow ASCONF's, can't delete last */
6315 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
6316 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
6317 if (stcb->sctp_ep->laddr_count < 2) {
6318 /* can't delete last address */
6319 return;
6320 }
6321 }
6322 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
6323 /* remove the address if it exists */
6324 if (laddr->ifa == NULL)
6325 continue;
6326 if (laddr->ifa == ifa) {
6327 sctp_remove_laddr(laddr);
6328 return;
6329 }
6330 }
6331
6332 /* address not found! */
6333 return;
6334 }
6335
6336 #if defined(__FreeBSD__)
6337 /*
6338 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
6339 */
6340 /* sysctl */
6341 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
6342 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
6343 #endif /* FreeBSD || APPLE */
6344
6345
6346
6347 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6348 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
6349 int *sctp_cpuarry = NULL;
6350 void
6351 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
6352 {
6353 /* Queue a packet to a processor for the specified core */
6354 struct sctp_mcore_queue *qent;
6355 struct sctp_mcore_ctrl *wkq;
6356 int need_wake = 0;
6357 if (sctp_mcore_workers == NULL) {
6358 /* Something went way bad during setup */
6359 sctp_input_with_port(m, off, 0);
6360 return;
6361 }
6362 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
6363 (sizeof(struct sctp_mcore_queue)),
6364 SCTP_M_MCORE);
6365 if (qent == NULL) {
6366 /* This is trouble */
6367 sctp_input_with_port(m, off, 0);
6368 return;
6369 }
6370 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6371 qent->vn = curvnet;
6372 #endif
6373 qent->m = m;
6374 qent->off = off;
6375 qent->v6 = 0;
6376 wkq = &sctp_mcore_workers[cpu_to_use];
6377 SCTP_MCORE_QLOCK(wkq);
6378
6379 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
6380 if (wkq->running == 0) {
6381 need_wake = 1;
6382 }
6383 SCTP_MCORE_QUNLOCK(wkq);
6384 if (need_wake) {
6385 wakeup(&wkq->running);
6386 }
6387 }
6388
6389 static void
6390 sctp_mcore_thread(void *arg)
6391 {
6392
6393 struct sctp_mcore_ctrl *wkq;
6394 struct sctp_mcore_queue *qent;
6395
6396 wkq = (struct sctp_mcore_ctrl *)arg;
6397 struct mbuf *m;
6398 int off, v6;
6399
6400 /* Wait for first tickle */
6401 SCTP_MCORE_LOCK(wkq);
6402 wkq->running = 0;
6403 msleep(&wkq->running,
6404 &wkq->core_mtx,
6405 0, "wait for pkt", 0);
6406 SCTP_MCORE_UNLOCK(wkq);
6407
6408 /* Bind to our cpu */
6409 thread_lock(curthread);
6410 sched_bind(curthread, wkq->cpuid);
6411 thread_unlock(curthread);
6412
6413 /* Now lets start working */
6414 SCTP_MCORE_LOCK(wkq);
6415 /* Now grab lock and go */
6416 for (;;) {
6417 SCTP_MCORE_QLOCK(wkq);
6418 skip_sleep:
6419 wkq->running = 1;
6420 qent = TAILQ_FIRST(&wkq->que);
6421 if (qent) {
6422 TAILQ_REMOVE(&wkq->que, qent, next);
6423 SCTP_MCORE_QUNLOCK(wkq);
6424 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6425 CURVNET_SET(qent->vn);
6426 #endif
6427 m = qent->m;
6428 off = qent->off;
6429 v6 = qent->v6;
6430 SCTP_FREE(qent, SCTP_M_MCORE);
6431 if (v6 == 0) {
6432 sctp_input_with_port(m, off, 0);
6433 } else {
6434 SCTP_PRINTF("V6 not yet supported\n");
6435 sctp_m_freem(m);
6436 }
6437 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6438 CURVNET_RESTORE();
6439 #endif
6440 SCTP_MCORE_QLOCK(wkq);
6441 }
6442 wkq->running = 0;
6443 if (!TAILQ_EMPTY(&wkq->que)) {
6444 goto skip_sleep;
6445 }
6446 SCTP_MCORE_QUNLOCK(wkq);
6447 msleep(&wkq->running,
6448 &wkq->core_mtx,
6449 0, "wait for pkt", 0);
6450 }
6451 }
6452
6453 static void
6454 sctp_startup_mcore_threads(void)
6455 {
6456 int i, cpu;
6457
6458 if (mp_ncpus == 1)
6459 return;
6460
6461 if (sctp_mcore_workers != NULL) {
6462 /* Already been here in some previous
6463 * vnet?
6464 */
6465 return;
6466 }
6467 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
6468 ((mp_maxid+1) * sizeof(struct sctp_mcore_ctrl)),
6469 SCTP_M_MCORE);
6470 if (sctp_mcore_workers == NULL) {
6471 /* TSNH I hope */
6472 return;
6473 }
6474 memset(sctp_mcore_workers, 0 , ((mp_maxid+1) *
6475 sizeof(struct sctp_mcore_ctrl)));
6476 /* Init the structures */
6477 for (i = 0; i<=mp_maxid; i++) {
6478 TAILQ_INIT(&sctp_mcore_workers[i].que);
6479 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
6480 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
6481 sctp_mcore_workers[i].cpuid = i;
6482 }
6483 if (sctp_cpuarry == NULL) {
6484 SCTP_MALLOC(sctp_cpuarry, int *,
6485 (mp_ncpus * sizeof(int)),
6486 SCTP_M_MCORE);
6487 i = 0;
6488 CPU_FOREACH(cpu) {
6489 sctp_cpuarry[i] = cpu;
6490 i++;
6491 }
6492 }
6493
6494 /* Now start them all */
6495 CPU_FOREACH(cpu) {
6496 #if __FreeBSD_version <= 701000
6497 (void)kthread_create(sctp_mcore_thread,
6498 (void *)&sctp_mcore_workers[cpu],
6499 &sctp_mcore_workers[cpu].thread_proc,
6500 RFPROC,
6501 SCTP_KTHREAD_PAGES,
6502 SCTP_MCORE_NAME);
6503
6504 #else
6505 (void)kproc_create(sctp_mcore_thread,
6506 (void *)&sctp_mcore_workers[cpu],
6507 &sctp_mcore_workers[cpu].thread_proc,
6508 RFPROC,
6509 SCTP_KTHREAD_PAGES,
6510 SCTP_MCORE_NAME);
6511 #endif
6512
6513 }
6514 }
6515 #endif
6516 #if defined(__FreeBSD__) && __FreeBSD_cc_version >= 1200000
6517 static struct mbuf *
6518 sctp_netisr_hdlr(struct mbuf *m, uintptr_t source)
6519 {
6520 struct ip *ip;
6521 struct sctphdr *sh;
6522 int offset;
6523 uint32_t flowid, tag;
6524
6525 /*
6526 * No flow id built by lower layers fix it so we
6527 * create one.
6528 */
6529 ip = mtod(m, struct ip *);
6530 offset = (ip->ip_hl << 2) + sizeof(struct sctphdr);
6531 if (SCTP_BUF_LEN(m) < offset) {
6532 if ((m = m_pullup(m, offset)) == NULL) {
6533 SCTP_STAT_INCR(sctps_hdrops);
6534 return (NULL);
6535 }
6536 ip = mtod(m, struct ip *);
6537 }
6538 sh = (struct sctphdr *)((caddr_t)ip + (ip->ip_hl << 2));
6539 tag = htonl(sh->v_tag);
6540 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6541 m->m_pkthdr.flowid = flowid;
6542 m->m_flags |= M_FLOWID;
6543 return (m);
6544 }
6545 #endif
6546
6547 void
6548 sctp_pcb_init()
6549 {
6550 /*
6551 * SCTP initialization for the PCB structures should be called by
6552 * the sctp_init() funciton.
6553 */
6554 int i;
6555 struct timeval tv;
6556
6557 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
6558 /* error I was called twice */
6559 return;
6560 }
6561 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
6562
6563 #if defined(SCTP_LOCAL_TRACE_BUF)
6564 #if defined(__Windows__)
6565 if (SCTP_BASE_SYSCTL(sctp_log) != NULL) {
6566 bzero(SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
6567 }
6568 #else
6569 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
6570 #endif
6571 #endif
6572 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6573 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
6574 ((mp_maxid+1) * sizeof(struct sctpstat)),
6575 SCTP_M_MCORE);
6576 #endif
6577 (void)SCTP_GETTIME_TIMEVAL(&tv);
6578 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6579 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid+1)));
6580 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
6581 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
6582 #else
6583 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
6584 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
6585 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
6586 #endif
6587 /* init the empty list of (All) Endpoints */
6588 LIST_INIT(&SCTP_BASE_INFO(listhead));
6589 #if defined(__APPLE__)
6590 LIST_INIT(&SCTP_BASE_INFO(inplisthead));
6591 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6592 SCTP_BASE_INFO(sctbinfo).listhead = &SCTP_BASE_INFO(inplisthead);
6593 SCTP_BASE_INFO(sctbinfo).mtx_grp_attr = lck_grp_attr_alloc_init();
6594 lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6595 SCTP_BASE_INFO(sctbinfo).mtx_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6596 SCTP_BASE_INFO(sctbinfo).mtx_attr = lck_attr_alloc_init();
6597 lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6598 #else
6599 SCTP_BASE_INFO(sctbinfo).ipi_listhead = &SCTP_BASE_INFO(inplisthead);
6600 SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr = lck_grp_attr_alloc_init();
6601 lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6602 SCTP_BASE_INFO(sctbinfo).ipi_lock_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6603 SCTP_BASE_INFO(sctbinfo).ipi_lock_attr = lck_attr_alloc_init();
6604 lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6605 #endif
6606 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6607 SCTP_BASE_INFO(sctbinfo).ipi_gc = sctp_gc;
6608 in_pcbinfo_attach(&SCTP_BASE_INFO(sctbinfo));
6609 #endif
6610 #endif
6611
6612
6613 /* init the hash table of endpoints */
6614 #if defined(__FreeBSD__)
6615 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
6616 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
6617 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6618 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
6619 #else
6620 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
6621 SCTP_BASE_SYSCTL(sctp_hashtblsize));
6622 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
6623 SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6624 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
6625 SCTP_BASE_SYSCTL(sctp_chunkscale));
6626 #endif
6627 #endif
6628 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
6629 &SCTP_BASE_INFO(hashasocmark));
6630 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6631 &SCTP_BASE_INFO(hashmark));
6632 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6633 &SCTP_BASE_INFO(hashtcpmark));
6634 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
6635
6636
6637 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
6638 &SCTP_BASE_INFO(hashvrfmark));
6639
6640 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
6641 &SCTP_BASE_INFO(vrf_ifn_hashmark));
6642 /* init the zones */
6643 /*
6644 * FIX ME: Should check for NULL returns, but if it does fail we are
6645 * doomed to panic anyways... add later maybe.
6646 */
6647 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
6648 sizeof(struct sctp_inpcb), maxsockets);
6649
6650 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
6651 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
6652
6653 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
6654 sizeof(struct sctp_laddr),
6655 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6656
6657 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
6658 sizeof(struct sctp_nets),
6659 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6660
6661 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
6662 sizeof(struct sctp_tmit_chunk),
6663 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6664
6665 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
6666 sizeof(struct sctp_queued_to_read),
6667 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6668
6669 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
6670 sizeof(struct sctp_stream_queue_pending),
6671 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6672
6673 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
6674 sizeof(struct sctp_asconf),
6675 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6676
6677 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
6678 sizeof(struct sctp_asconf_ack),
6679 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6680
6681
6682 /* Master Lock INIT for info structure */
6683 SCTP_INP_INFO_LOCK_INIT();
6684 SCTP_STATLOG_INIT_LOCK();
6685
6686 SCTP_IPI_COUNT_INIT();
6687 SCTP_IPI_ADDR_INIT();
6688 #ifdef SCTP_PACKET_LOGGING
6689 SCTP_IP_PKTLOG_INIT();
6690 #endif
6691 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
6692
6693 SCTP_WQ_ADDR_INIT();
6694 /* not sure if we need all the counts */
6695 SCTP_BASE_INFO(ipi_count_ep) = 0;
6696 /* assoc/tcb zone info */
6697 SCTP_BASE_INFO(ipi_count_asoc) = 0;
6698 /* local addrlist zone info */
6699 SCTP_BASE_INFO(ipi_count_laddr) = 0;
6700 /* remote addrlist zone info */
6701 SCTP_BASE_INFO(ipi_count_raddr) = 0;
6702 /* chunk info */
6703 SCTP_BASE_INFO(ipi_count_chunk) = 0;
6704
6705 /* socket queue zone info */
6706 SCTP_BASE_INFO(ipi_count_readq) = 0;
6707
6708 /* stream out queue cont */
6709 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
6710
6711 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
6712 SCTP_BASE_INFO(ipi_free_chunks) = 0;
6713
6714 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
6715
6716 /* Init the TIMEWAIT list */
6717 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6718 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
6719 }
6720 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6721 #if defined(__Userspace_os_Windows)
6722 InitializeConditionVariable(&sctp_it_ctl.iterator_wakeup);
6723 #else
6724 (void)pthread_cond_init(&sctp_it_ctl.iterator_wakeup, NULL);
6725 #endif
6726 #endif
6727 sctp_startup_iterator();
6728
6729 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6730 sctp_startup_mcore_threads();
6731 #endif
6732
6733 #ifndef __Panda__
6734 /*
6735 * INIT the default VRF which for BSD is the only one, other O/S's
6736 * may have more. But initially they must start with one and then
6737 * add the VRF's as addresses are added.
6738 */
6739 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
6740 #endif
6741 #if defined(__FreeBSD__) && __FreeBSD_cc_version >= 1200000
6742 if (ip_register_flow_handler(sctp_netisr_hdlr, IPPROTO_SCTP)) {
6743 SCTP_PRINTF("***SCTP- Error can't register netisr handler***\n");
6744 }
6745 #endif
6746 #if defined(_SCTP_NEEDS_CALLOUT_) || defined(_USER_SCTP_NEEDS_CALLOUT_)
6747 /* allocate the lock for the callout/timer queue */
6748 SCTP_TIMERQ_LOCK_INIT();
6749 TAILQ_INIT(&SCTP_BASE_INFO(callqueue));
6750 #endif
6751 #if defined(__Userspace__)
6752 mbuf_init(NULL);
6753 atomic_init();
6754 #if defined(INET) || defined(INET6)
6755 recv_thread_init();
6756 #endif
6757 #endif
6758 }
6759
6760 /*
6761 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
6762 */
6763 void
6764 sctp_pcb_finish(void)
6765 {
6766 struct sctp_vrflist *vrf_bucket;
6767 struct sctp_vrf *vrf, *nvrf;
6768 struct sctp_ifn *ifn, *nifn;
6769 struct sctp_ifa *ifa, *nifa;
6770 struct sctpvtaghead *chain;
6771 struct sctp_tagblock *twait_block, *prev_twait_block;
6772 struct sctp_laddr *wi, *nwi;
6773 int i;
6774 struct sctp_iterator *it, *nit;
6775
6776 #if !defined(__FreeBSD__)
6777 /* Notify the iterator to exit. */
6778 SCTP_IPI_ITERATOR_WQ_LOCK();
6779 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_MUST_EXIT;
6780 sctp_wakeup_iterator();
6781 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6782 #endif
6783 #if defined(__APPLE__)
6784 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6785 in_pcbinfo_detach(&SCTP_BASE_INFO(sctbinfo));
6786 #endif
6787 SCTP_IPI_ITERATOR_WQ_LOCK();
6788 do {
6789 msleep(&sctp_it_ctl.iterator_flags,
6790 sctp_it_ctl.ipi_iterator_wq_mtx,
6791 0, "waiting_for_work", 0);
6792 } while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_EXITED) == 0);
6793 thread_deallocate(sctp_it_ctl.thread_proc);
6794 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6795 #endif
6796 #if defined(__Windows__)
6797 if (sctp_it_ctl.iterator_thread_obj != NULL) {
6798 NTSTATUS status = STATUS_SUCCESS;
6799
6800 KeSetEvent(&sctp_it_ctl.iterator_wakeup[1], IO_NO_INCREMENT, FALSE);
6801 status = KeWaitForSingleObject(sctp_it_ctl.iterator_thread_obj,
6802 Executive,
6803 KernelMode,
6804 FALSE,
6805 NULL);
6806 ObDereferenceObject(sctp_it_ctl.iterator_thread_obj);
6807 }
6808 #endif
6809 #if defined(__Userspace__)
6810 if (sctp_it_ctl.thread_proc) {
6811 #if defined(__Userspace_os_Windows)
6812 WaitForSingleObject(sctp_it_ctl.thread_proc, INFINITE);
6813 CloseHandle(sctp_it_ctl.thread_proc);
6814 sctp_it_ctl.thread_proc = NULL;
6815 #else
6816 pthread_join(sctp_it_ctl.thread_proc, NULL);
6817 sctp_it_ctl.thread_proc = 0;
6818 #endif
6819 }
6820 #endif
6821 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6822 #if defined(__Userspace_os_Windows)
6823 DeleteConditionVariable(&sctp_it_ctl.iterator_wakeup);
6824 #else
6825 pthread_cond_destroy(&sctp_it_ctl.iterator_wakeup);
6826 #endif
6827 #endif
6828 /* In FreeBSD the iterator thread never exits
6829 * but we do clean up.
6830 * The only way FreeBSD reaches here is if we have VRF's
6831 * but we still add the ifdef to make it compile on old versions.
6832 */
6833 SCTP_IPI_ITERATOR_WQ_LOCK();
6834 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6835 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6836 if (it->vn != curvnet) {
6837 continue;
6838 }
6839 #endif
6840 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6841 if (it->function_atend != NULL) {
6842 (*it->function_atend) (it->pointer, it->val);
6843 }
6844 SCTP_FREE(it,SCTP_M_ITER);
6845 }
6846 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6847 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6848 SCTP_ITERATOR_LOCK();
6849 if ((sctp_it_ctl.cur_it) &&
6850 (sctp_it_ctl.cur_it->vn == curvnet)) {
6851 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6852 }
6853 SCTP_ITERATOR_UNLOCK();
6854 #endif
6855 #if !defined(__FreeBSD__)
6856 SCTP_IPI_ITERATOR_WQ_DESTROY();
6857 SCTP_ITERATOR_LOCK_DESTROY();
6858 #endif
6859 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6860 SCTP_WQ_ADDR_LOCK();
6861 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6862 LIST_REMOVE(wi, sctp_nxt_addr);
6863 SCTP_DECR_LADDR_COUNT();
6864 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6865 }
6866 SCTP_WQ_ADDR_UNLOCK();
6867
6868 /*
6869 * free the vrf/ifn/ifa lists and hashes (be sure address monitor
6870 * is destroyed first).
6871 */
6872 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6873 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6874 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6875 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6876 /* free the ifa */
6877 LIST_REMOVE(ifa, next_bucket);
6878 LIST_REMOVE(ifa, next_ifa);
6879 SCTP_FREE(ifa, SCTP_M_IFA);
6880 }
6881 /* free the ifn */
6882 LIST_REMOVE(ifn, next_bucket);
6883 LIST_REMOVE(ifn, next_ifn);
6884 SCTP_FREE(ifn, SCTP_M_IFN);
6885 }
6886 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6887 /* free the vrf */
6888 LIST_REMOVE(vrf, next_vrf);
6889 SCTP_FREE(vrf, SCTP_M_VRF);
6890 }
6891 /* free the vrf hashes */
6892 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6893 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6894 #if defined(__Userspace__) && !defined(__Userspace_os_Windows)
6895 /* free memory allocated by getifaddrs call */
6896 #if defined(INET) || defined(INET6)
6897 freeifaddrs(g_interfaces);
6898 #endif
6899 #endif
6900
6901 /* free the TIMEWAIT list elements malloc'd in the function
6902 * sctp_add_vtag_to_timewait()...
6903 */
6904 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6905 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6906 if (!LIST_EMPTY(chain)) {
6907 prev_twait_block = NULL;
6908 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6909 if (prev_twait_block) {
6910 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6911 }
6912 prev_twait_block = twait_block;
6913 }
6914 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6915 }
6916 }
6917
6918 /* free the locks and mutexes */
6919 #if defined(__APPLE__)
6920 SCTP_TIMERQ_LOCK_DESTROY();
6921 #endif
6922 #ifdef SCTP_PACKET_LOGGING
6923 SCTP_IP_PKTLOG_DESTROY();
6924 #endif
6925 SCTP_IPI_ADDR_DESTROY();
6926 #if defined(__APPLE__)
6927 SCTP_IPI_COUNT_DESTROY();
6928 #endif
6929 SCTP_STATLOG_DESTROY();
6930 SCTP_INP_INFO_LOCK_DESTROY();
6931
6932 SCTP_WQ_ADDR_DESTROY();
6933
6934 #if defined(__APPLE__)
6935 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6936 lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6937 lck_grp_free(SCTP_BASE_INFO(sctbinfo).mtx_grp);
6938 lck_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6939 #else
6940 lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6941 lck_grp_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp);
6942 lck_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6943 #endif
6944 #endif
6945 #if defined(__Userspace__)
6946 SCTP_TIMERQ_LOCK_DESTROY();
6947 SCTP_ZONE_DESTROY(zone_mbuf);
6948 SCTP_ZONE_DESTROY(zone_clust);
6949 SCTP_ZONE_DESTROY(zone_ext_refcnt);
6950 #endif
6951 #if defined(__Windows__) || defined(__FreeBSD__) || defined(__Userspace__)
6952 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6953 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6954 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6955 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6956 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6957 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6958 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6959 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6960 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6961 #endif
6962 /* Get rid of other stuff to */
6963 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6964 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6965 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6966 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6967 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6968 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6969 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6970 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6971 #endif
6972 }
6973
6974
6975 int
6976 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6977 int offset, int limit,
6978 struct sockaddr *src, struct sockaddr *dst,
6979 struct sockaddr *altsa)
6980 {
6981 /*
6982 * grub through the INIT pulling addresses and loading them to the
6983 * nets structure in the asoc. The from address in the mbuf should
6984 * also be loaded (if it is not already). This routine can be called
6985 * with either INIT or INIT-ACK's as long as the m points to the IP
6986 * packet and the offset points to the beginning of the parameters.
6987 */
6988 struct sctp_inpcb *inp;
6989 struct sctp_nets *net, *nnet, *net_tmp;
6990 struct sctp_paramhdr *phdr, parm_buf;
6991 struct sctp_tcb *stcb_tmp;
6992 uint16_t ptype, plen;
6993 struct sockaddr *sa;
6994 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6995 struct sctp_auth_random *p_random = NULL;
6996 uint16_t random_len = 0;
6997 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6998 struct sctp_auth_hmac_algo *hmacs = NULL;
6999 uint16_t hmacs_len = 0;
7000 uint8_t saw_asconf = 0;
7001 uint8_t saw_asconf_ack = 0;
7002 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
7003 struct sctp_auth_chunk_list *chunks = NULL;
7004 uint16_t num_chunks = 0;
7005 sctp_key_t *new_key;
7006 uint32_t keylen;
7007 int got_random = 0, got_hmacs = 0, got_chklist = 0;
7008 uint8_t ecn_allowed;
7009 #ifdef INET
7010 struct sockaddr_in sin;
7011 #endif
7012 #ifdef INET6
7013 struct sockaddr_in6 sin6;
7014 #endif
7015
7016 /* First get the destination address setup too. */
7017 #ifdef INET
7018 memset(&sin, 0, sizeof(sin));
7019 sin.sin_family = AF_INET;
7020 #ifdef HAVE_SIN_LEN
7021 sin.sin_len = sizeof(sin);
7022 #endif
7023 sin.sin_port = stcb->rport;
7024 #endif
7025 #ifdef INET6
7026 memset(&sin6, 0, sizeof(sin6));
7027 sin6.sin6_family = AF_INET6;
7028 #ifdef HAVE_SIN6_LEN
7029 sin6.sin6_len = sizeof(struct sockaddr_in6);
7030 #endif
7031 sin6.sin6_port = stcb->rport;
7032 #endif
7033 if (altsa) {
7034 sa = altsa;
7035 } else {
7036 sa = src;
7037 }
7038 /* Turn off ECN until we get through all params */
7039 ecn_allowed = 0;
7040 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
7041 /* mark all addresses that we have currently on the list */
7042 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
7043 }
7044 /* does the source address already exist? if so skip it */
7045 inp = stcb->sctp_ep;
7046 atomic_add_int(&stcb->asoc.refcnt, 1);
7047 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
7048 atomic_add_int(&stcb->asoc.refcnt, -1);
7049
7050 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
7051 /* we must add the source address */
7052 /* no scope set here since we have a tcb already. */
7053 switch (sa->sa_family) {
7054 #ifdef INET
7055 case AF_INET:
7056 if (stcb->asoc.scope.ipv4_addr_legal) {
7057 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
7058 return (-1);
7059 }
7060 }
7061 break;
7062 #endif
7063 #ifdef INET6
7064 case AF_INET6:
7065 if (stcb->asoc.scope.ipv6_addr_legal) {
7066 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7067 return (-2);
7068 }
7069 }
7070 break;
7071 #endif
7072 #if defined(__Userspace__)
7073 case AF_CONN:
7074 if (stcb->asoc.scope.conn_addr_legal) {
7075 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7076 return (-2);
7077 }
7078 }
7079 break;
7080 #endif
7081 default:
7082 break;
7083 }
7084 } else {
7085 if (net_tmp != NULL && stcb_tmp == stcb) {
7086 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
7087 } else if (stcb_tmp != stcb) {
7088 /* It belongs to another association? */
7089 if (stcb_tmp)
7090 SCTP_TCB_UNLOCK(stcb_tmp);
7091 return (-3);
7092 }
7093 }
7094 if (stcb->asoc.state == 0) {
7095 /* the assoc was freed? */
7096 return (-4);
7097 }
7098 /*
7099 * peer must explicitly turn this on. This may have been initialized
7100 * to be "on" in order to allow local addr changes while INIT's are
7101 * in flight.
7102 */
7103 stcb->asoc.peer_supports_asconf = 0;
7104 /* now we must go through each of the params. */
7105 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
7106 while (phdr) {
7107 ptype = ntohs(phdr->param_type);
7108 plen = ntohs(phdr->param_length);
7109 /*
7110 * SCTP_PRINTF("ptype => %0x, plen => %d\n", (uint32_t)ptype,
7111 * (int)plen);
7112 */
7113 if (offset + plen > limit) {
7114 break;
7115 }
7116 if (plen == 0) {
7117 break;
7118 }
7119 #ifdef INET
7120 if (ptype == SCTP_IPV4_ADDRESS) {
7121 if (stcb->asoc.scope.ipv4_addr_legal) {
7122 struct sctp_ipv4addr_param *p4, p4_buf;
7123
7124 /* ok get the v4 address and check/add */
7125 phdr = sctp_get_next_param(m, offset,
7126 (struct sctp_paramhdr *)&p4_buf,
7127 sizeof(p4_buf));
7128 if (plen != sizeof(struct sctp_ipv4addr_param) ||
7129 phdr == NULL) {
7130 return (-5);
7131 }
7132 p4 = (struct sctp_ipv4addr_param *)phdr;
7133 sin.sin_addr.s_addr = p4->addr;
7134 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
7135 /* Skip multi-cast addresses */
7136 goto next_param;
7137 }
7138 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
7139 (sin.sin_addr.s_addr == INADDR_ANY)) {
7140 goto next_param;
7141 }
7142 sa = (struct sockaddr *)&sin;
7143 inp = stcb->sctp_ep;
7144 atomic_add_int(&stcb->asoc.refcnt, 1);
7145 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7146 dst, stcb);
7147 atomic_add_int(&stcb->asoc.refcnt, -1);
7148
7149 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
7150 inp == NULL) {
7151 /* we must add the source address */
7152 /*
7153 * no scope set since we have a tcb
7154 * already
7155 */
7156
7157 /*
7158 * we must validate the state again
7159 * here
7160 */
7161 add_it_now:
7162 if (stcb->asoc.state == 0) {
7163 /* the assoc was freed? */
7164 return (-7);
7165 }
7166 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
7167 return (-8);
7168 }
7169 } else if (stcb_tmp == stcb) {
7170 if (stcb->asoc.state == 0) {
7171 /* the assoc was freed? */
7172 return (-10);
7173 }
7174 if (net != NULL) {
7175 /* clear flag */
7176 net->dest_state &=
7177 ~SCTP_ADDR_NOT_IN_ASSOC;
7178 }
7179 } else {
7180 /*
7181 * strange, address is in another
7182 * assoc? straighten out locks.
7183 */
7184 if (stcb_tmp) {
7185 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
7186 /* in setup state we abort this guy */
7187 sctp_abort_an_association(stcb_tmp->sctp_ep,
7188 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
7189 goto add_it_now;
7190 }
7191 SCTP_TCB_UNLOCK(stcb_tmp);
7192 }
7193
7194 if (stcb->asoc.state == 0) {
7195 /* the assoc was freed? */
7196 return (-12);
7197 }
7198 return (-13);
7199 }
7200 }
7201 } else
7202 #endif
7203 #ifdef INET6
7204 if (ptype == SCTP_IPV6_ADDRESS) {
7205 if (stcb->asoc.scope.ipv6_addr_legal) {
7206 /* ok get the v6 address and check/add */
7207 struct sctp_ipv6addr_param *p6, p6_buf;
7208
7209 phdr = sctp_get_next_param(m, offset,
7210 (struct sctp_paramhdr *)&p6_buf,
7211 sizeof(p6_buf));
7212 if (plen != sizeof(struct sctp_ipv6addr_param) ||
7213 phdr == NULL) {
7214 return (-14);
7215 }
7216 p6 = (struct sctp_ipv6addr_param *)phdr;
7217 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
7218 sizeof(p6->addr));
7219 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
7220 /* Skip multi-cast addresses */
7221 goto next_param;
7222 }
7223 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
7224 /* Link local make no sense without scope */
7225 goto next_param;
7226 }
7227 sa = (struct sockaddr *)&sin6;
7228 inp = stcb->sctp_ep;
7229 atomic_add_int(&stcb->asoc.refcnt, 1);
7230 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7231 dst, stcb);
7232 atomic_add_int(&stcb->asoc.refcnt, -1);
7233 if (stcb_tmp == NULL &&
7234 (inp == stcb->sctp_ep || inp == NULL)) {
7235 /*
7236 * we must validate the state again
7237 * here
7238 */
7239 add_it_now6:
7240 if (stcb->asoc.state == 0) {
7241 /* the assoc was freed? */
7242 return (-16);
7243 }
7244 /*
7245 * we must add the address, no scope
7246 * set
7247 */
7248 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
7249 return (-17);
7250 }
7251 } else if (stcb_tmp == stcb) {
7252 /*
7253 * we must validate the state again
7254 * here
7255 */
7256 if (stcb->asoc.state == 0) {
7257 /* the assoc was freed? */
7258 return (-19);
7259 }
7260 if (net != NULL) {
7261 /* clear flag */
7262 net->dest_state &=
7263 ~SCTP_ADDR_NOT_IN_ASSOC;
7264 }
7265 } else {
7266 /*
7267 * strange, address is in another
7268 * assoc? straighten out locks.
7269 */
7270 if (stcb_tmp)
7271 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
7272 /* in setup state we abort this guy */
7273 sctp_abort_an_association(stcb_tmp->sctp_ep,
7274 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
7275 goto add_it_now6;
7276 }
7277 SCTP_TCB_UNLOCK(stcb_tmp);
7278
7279 if (stcb->asoc.state == 0) {
7280 /* the assoc was freed? */
7281 return (-21);
7282 }
7283 return (-22);
7284 }
7285 }
7286 } else
7287 #endif
7288 if (ptype == SCTP_ECN_CAPABLE) {
7289 ecn_allowed = 1;
7290 } else if (ptype == SCTP_ULP_ADAPTATION) {
7291 if (stcb->asoc.state != SCTP_STATE_OPEN) {
7292 struct sctp_adaptation_layer_indication ai, *aip;
7293
7294 phdr = sctp_get_next_param(m, offset,
7295 (struct sctp_paramhdr *)&ai, sizeof(ai));
7296 aip = (struct sctp_adaptation_layer_indication *)phdr;
7297 if (aip) {
7298 stcb->asoc.peers_adaptation = ntohl(aip->indication);
7299 stcb->asoc.adaptation_needed = 1;
7300 }
7301 }
7302 } else if (ptype == SCTP_SET_PRIM_ADDR) {
7303 struct sctp_asconf_addr_param lstore, *fee;
7304 int lptype;
7305 struct sockaddr *lsa = NULL;
7306 #ifdef INET
7307 struct sctp_asconf_addrv4_param *fii;
7308 #endif
7309
7310 stcb->asoc.peer_supports_asconf = 1;
7311 if (plen > sizeof(lstore)) {
7312 return (-23);
7313 }
7314 phdr = sctp_get_next_param(m, offset,
7315 (struct sctp_paramhdr *)&lstore,
7316 min(plen,sizeof(lstore)));
7317 if (phdr == NULL) {
7318 return (-24);
7319 }
7320 fee = (struct sctp_asconf_addr_param *)phdr;
7321 lptype = ntohs(fee->addrp.ph.param_type);
7322 switch (lptype) {
7323 #ifdef INET
7324 case SCTP_IPV4_ADDRESS:
7325 if (plen !=
7326 sizeof(struct sctp_asconf_addrv4_param)) {
7327 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
7328 (int)sizeof(struct sctp_asconf_addrv4_param),
7329 plen);
7330 } else {
7331 fii = (struct sctp_asconf_addrv4_param *)fee;
7332 sin.sin_addr.s_addr = fii->addrp.addr;
7333 lsa = (struct sockaddr *)&sin;
7334 }
7335 break;
7336 #endif
7337 #ifdef INET6
7338 case SCTP_IPV6_ADDRESS:
7339 if (plen !=
7340 sizeof(struct sctp_asconf_addr_param)) {
7341 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
7342 (int)sizeof(struct sctp_asconf_addr_param),
7343 plen);
7344 } else {
7345 memcpy(sin6.sin6_addr.s6_addr,
7346 fee->addrp.addr,
7347 sizeof(fee->addrp.addr));
7348 lsa = (struct sockaddr *)&sin6;
7349 }
7350 break;
7351 #endif
7352 default:
7353 break;
7354 }
7355 if (lsa) {
7356 (void)sctp_set_primary_addr(stcb, sa, NULL);
7357 }
7358 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
7359 stcb->asoc.peer_supports_nat = 1;
7360 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
7361 /* Peer supports pr-sctp */
7362 stcb->asoc.peer_supports_prsctp = 1;
7363 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
7364 /* A supported extension chunk */
7365 struct sctp_supported_chunk_types_param *pr_supported;
7366 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
7367 int num_ent, i;
7368
7369 phdr = sctp_get_next_param(m, offset,
7370 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store),plen));
7371 if (phdr == NULL) {
7372 return (-25);
7373 }
7374 stcb->asoc.peer_supports_asconf = 0;
7375 stcb->asoc.peer_supports_prsctp = 0;
7376 stcb->asoc.peer_supports_pktdrop = 0;
7377 stcb->asoc.peer_supports_strreset = 0;
7378 stcb->asoc.peer_supports_nr_sack = 0;
7379 stcb->asoc.peer_supports_auth = 0;
7380 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
7381 num_ent = plen - sizeof(struct sctp_paramhdr);
7382 for (i = 0; i < num_ent; i++) {
7383 switch (pr_supported->chunk_types[i]) {
7384 case SCTP_ASCONF:
7385 case SCTP_ASCONF_ACK:
7386 stcb->asoc.peer_supports_asconf = 1;
7387 break;
7388 case SCTP_FORWARD_CUM_TSN:
7389 stcb->asoc.peer_supports_prsctp = 1;
7390 break;
7391 case SCTP_PACKET_DROPPED:
7392 stcb->asoc.peer_supports_pktdrop = 1;
7393 break;
7394 case SCTP_NR_SELECTIVE_ACK:
7395 stcb->asoc.peer_supports_nr_sack = 1;
7396 break;
7397 case SCTP_STREAM_RESET:
7398 stcb->asoc.peer_supports_strreset = 1;
7399 break;
7400 case SCTP_AUTHENTICATION:
7401 stcb->asoc.peer_supports_auth = 1;
7402 break;
7403 default:
7404 /* one I have not learned yet */
7405 break;
7406
7407 }
7408 }
7409 } else if (ptype == SCTP_RANDOM) {
7410 if (plen > sizeof(random_store))
7411 break;
7412 if (got_random) {
7413 /* already processed a RANDOM */
7414 goto next_param;
7415 }
7416 phdr = sctp_get_next_param(m, offset,
7417 (struct sctp_paramhdr *)random_store,
7418 min(sizeof(random_store),plen));
7419 if (phdr == NULL)
7420 return (-26);
7421 p_random = (struct sctp_auth_random *)phdr;
7422 random_len = plen - sizeof(*p_random);
7423 /* enforce the random length */
7424 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
7425 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
7426 return (-27);
7427 }
7428 got_random = 1;
7429 } else if (ptype == SCTP_HMAC_LIST) {
7430 int num_hmacs;
7431 int i;
7432
7433 if (plen > sizeof(hmacs_store))
7434 break;
7435 if (got_hmacs) {
7436 /* already processed a HMAC list */
7437 goto next_param;
7438 }
7439 phdr = sctp_get_next_param(m, offset,
7440 (struct sctp_paramhdr *)hmacs_store,
7441 min(plen,sizeof(hmacs_store)));
7442 if (phdr == NULL)
7443 return (-28);
7444 hmacs = (struct sctp_auth_hmac_algo *)phdr;
7445 hmacs_len = plen - sizeof(*hmacs);
7446 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
7447 /* validate the hmac list */
7448 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
7449 return (-29);
7450 }
7451 if (stcb->asoc.peer_hmacs != NULL)
7452 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
7453 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
7454 if (stcb->asoc.peer_hmacs != NULL) {
7455 for (i = 0; i < num_hmacs; i++) {
7456 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
7457 ntohs(hmacs->hmac_ids[i]));
7458 }
7459 }
7460 got_hmacs = 1;
7461 } else if (ptype == SCTP_CHUNK_LIST) {
7462 int i;
7463
7464 if (plen > sizeof(chunks_store))
7465 break;
7466 if (got_chklist) {
7467 /* already processed a Chunks list */
7468 goto next_param;
7469 }
7470 phdr = sctp_get_next_param(m, offset,
7471 (struct sctp_paramhdr *)chunks_store,
7472 min(plen,sizeof(chunks_store)));
7473 if (phdr == NULL)
7474 return (-30);
7475 chunks = (struct sctp_auth_chunk_list *)phdr;
7476 num_chunks = plen - sizeof(*chunks);
7477 if (stcb->asoc.peer_auth_chunks != NULL)
7478 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
7479 else
7480 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
7481 for (i = 0; i < num_chunks; i++) {
7482 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
7483 stcb->asoc.peer_auth_chunks);
7484 /* record asconf/asconf-ack if listed */
7485 if (chunks->chunk_types[i] == SCTP_ASCONF)
7486 saw_asconf = 1;
7487 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
7488 saw_asconf_ack = 1;
7489
7490 }
7491 got_chklist = 1;
7492 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
7493 (ptype == SCTP_STATE_COOKIE) ||
7494 (ptype == SCTP_UNRECOG_PARAM) ||
7495 (ptype == SCTP_COOKIE_PRESERVE) ||
7496 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
7497 (ptype == SCTP_ADD_IP_ADDRESS) ||
7498 (ptype == SCTP_DEL_IP_ADDRESS) ||
7499 (ptype == SCTP_ERROR_CAUSE_IND) ||
7500 (ptype == SCTP_SUCCESS_REPORT)) {
7501 /* don't care */ ;
7502 } else {
7503 if ((ptype & 0x8000) == 0x0000) {
7504 /*
7505 * must stop processing the rest of the
7506 * param's. Any report bits were handled
7507 * with the call to
7508 * sctp_arethere_unrecognized_parameters()
7509 * when the INIT or INIT-ACK was first seen.
7510 */
7511 break;
7512 }
7513 }
7514
7515 next_param:
7516 offset += SCTP_SIZE32(plen);
7517 if (offset >= limit) {
7518 break;
7519 }
7520 phdr = sctp_get_next_param(m, offset, &parm_buf,
7521 sizeof(parm_buf));
7522 }
7523 /* Now check to see if we need to purge any addresses */
7524 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
7525 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
7526 SCTP_ADDR_NOT_IN_ASSOC) {
7527 /* This address has been removed from the asoc */
7528 /* remove and free it */
7529 stcb->asoc.numnets--;
7530 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
7531 sctp_free_remote_addr(net);
7532 if (net == stcb->asoc.primary_destination) {
7533 stcb->asoc.primary_destination = NULL;
7534 sctp_select_primary_destination(stcb);
7535 }
7536 }
7537 }
7538 if (ecn_allowed == 0) {
7539 stcb->asoc.ecn_allowed = 0;
7540 }
7541 /* validate authentication required parameters */
7542 if (got_random && got_hmacs) {
7543 stcb->asoc.peer_supports_auth = 1;
7544 } else {
7545 stcb->asoc.peer_supports_auth = 0;
7546 }
7547 if (!stcb->asoc.peer_supports_auth && got_chklist) {
7548 /* peer does not support auth but sent a chunks list? */
7549 return (-31);
7550 }
7551 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
7552 !stcb->asoc.peer_supports_auth) {
7553 /* peer supports asconf but not auth? */
7554 return (-32);
7555 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
7556 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
7557 return (-33);
7558 }
7559 /* concatenate the full random key */
7560 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
7561 if (chunks != NULL) {
7562 keylen += sizeof(*chunks) + num_chunks;
7563 }
7564 new_key = sctp_alloc_key(keylen);
7565 if (new_key != NULL) {
7566 /* copy in the RANDOM */
7567 if (p_random != NULL) {
7568 keylen = sizeof(*p_random) + random_len;
7569 bcopy(p_random, new_key->key, keylen);
7570 }
7571 /* append in the AUTH chunks */
7572 if (chunks != NULL) {
7573 bcopy(chunks, new_key->key + keylen,
7574 sizeof(*chunks) + num_chunks);
7575 keylen += sizeof(*chunks) + num_chunks;
7576 }
7577 /* append in the HMACs */
7578 if (hmacs != NULL) {
7579 bcopy(hmacs, new_key->key + keylen,
7580 sizeof(*hmacs) + hmacs_len);
7581 }
7582 } else {
7583 /* failed to get memory for the key */
7584 return (-34);
7585 }
7586 if (stcb->asoc.authinfo.peer_random != NULL)
7587 sctp_free_key(stcb->asoc.authinfo.peer_random);
7588 stcb->asoc.authinfo.peer_random = new_key;
7589 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
7590 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
7591
7592 return (0);
7593 }
7594
7595 int
7596 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
7597 struct sctp_nets *net)
7598 {
7599 /* make sure the requested primary address exists in the assoc */
7600 if (net == NULL && sa)
7601 net = sctp_findnet(stcb, sa);
7602
7603 if (net == NULL) {
7604 /* didn't find the requested primary address! */
7605 return (-1);
7606 } else {
7607 /* set the primary address */
7608 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7609 /* Must be confirmed, so queue to set */
7610 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
7611 return (0);
7612 }
7613 stcb->asoc.primary_destination = net;
7614 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
7615 sctp_free_remote_addr(stcb->asoc.alternate);
7616 stcb->asoc.alternate = NULL;
7617 }
7618 net = TAILQ_FIRST(&stcb->asoc.nets);
7619 if (net != stcb->asoc.primary_destination) {
7620 /* first one on the list is NOT the primary
7621 * sctp_cmpaddr() is much more efficient if
7622 * the primary is the first on the list, make it
7623 * so.
7624 */
7625 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7626 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7627 }
7628 return (0);
7629 }
7630 }
7631
7632 int
7633 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
7634 {
7635 /*
7636 * This function serves two purposes. It will see if a TAG can be
7637 * re-used and return 1 for yes it is ok and 0 for don't use that
7638 * tag. A secondary function it will do is purge out old tags that
7639 * can be removed.
7640 */
7641 struct sctpvtaghead *chain;
7642 struct sctp_tagblock *twait_block;
7643 struct sctpasochead *head;
7644 struct sctp_tcb *stcb;
7645 int i;
7646
7647 SCTP_INP_INFO_RLOCK();
7648 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
7649 SCTP_BASE_INFO(hashasocmark))];
7650 if (head == NULL) {
7651 /* invalid vtag */
7652 goto skip_vtag_check;
7653 }
7654 LIST_FOREACH(stcb, head, sctp_asocs) {
7655 /* We choose not to lock anything here. TCB's can't be
7656 * removed since we have the read lock, so they can't
7657 * be freed on us, same thing for the INP. I may
7658 * be wrong with this assumption, but we will go
7659 * with it for now :-)
7660 */
7661 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
7662 continue;
7663 }
7664 if (stcb->asoc.my_vtag == tag) {
7665 /* candidate */
7666 if (stcb->rport != rport) {
7667 continue;
7668 }
7669 if (stcb->sctp_ep->sctp_lport != lport) {
7670 continue;
7671 }
7672 /* Its a used tag set */
7673 SCTP_INP_INFO_RUNLOCK();
7674 return (0);
7675 }
7676 }
7677 skip_vtag_check:
7678
7679 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
7680 /* Now what about timed wait ? */
7681 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
7682 /*
7683 * Block(s) are present, lets see if we have this tag in the
7684 * list
7685 */
7686 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
7687 if (twait_block->vtag_block[i].v_tag == 0) {
7688 /* not used */
7689 continue;
7690 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
7691 now->tv_sec) {
7692 /* Audit expires this guy */
7693 twait_block->vtag_block[i].tv_sec_at_expire = 0;
7694 twait_block->vtag_block[i].v_tag = 0;
7695 twait_block->vtag_block[i].lport = 0;
7696 twait_block->vtag_block[i].rport = 0;
7697 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
7698 (twait_block->vtag_block[i].lport == lport) &&
7699 (twait_block->vtag_block[i].rport == rport)) {
7700 /* Bad tag, sorry :< */
7701 SCTP_INP_INFO_RUNLOCK();
7702 return (0);
7703 }
7704 }
7705 }
7706 SCTP_INP_INFO_RUNLOCK();
7707 return (1);
7708 }
7709
7710 static void
7711 sctp_drain_mbufs(struct sctp_tcb *stcb)
7712 {
7713 /*
7714 * We must hunt this association for MBUF's past the cumack (i.e.
7715 * out of order data that we can renege on).
7716 */
7717 struct sctp_association *asoc;
7718 struct sctp_tmit_chunk *chk, *nchk;
7719 uint32_t cumulative_tsn_p1;
7720 struct sctp_queued_to_read *ctl, *nctl;
7721 int cnt, strmat;
7722 uint32_t gap, i;
7723 int fnd = 0;
7724
7725 /* We look for anything larger than the cum-ack + 1 */
7726
7727 asoc = &stcb->asoc;
7728 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
7729 /* none we can reneg on. */
7730 return;
7731 }
7732 SCTP_STAT_INCR(sctps_protocol_drains_done);
7733 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
7734 cnt = 0;
7735 /* First look in the re-assembly queue */
7736 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
7737 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
7738 /* Yep it is above cum-ack */
7739 cnt++;
7740 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
7741 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
7742 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
7743 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7744 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
7745 if (chk->data) {
7746 sctp_m_freem(chk->data);
7747 chk->data = NULL;
7748 }
7749 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7750 }
7751 }
7752 /* Ok that was fun, now we will drain all the inbound streams? */
7753 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
7754 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
7755 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
7756 /* Yep it is above cum-ack */
7757 cnt++;
7758 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
7759 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
7760 sctp_ucount_decr(asoc->cnt_on_all_streams);
7761 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7762 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
7763 if (ctl->data) {
7764 sctp_m_freem(ctl->data);
7765 ctl->data = NULL;
7766 }
7767 sctp_free_remote_addr(ctl->whoFrom);
7768 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
7769 SCTP_DECR_READQ_COUNT();
7770 }
7771 }
7772 }
7773 if (cnt) {
7774 /* We must back down to see what the new highest is */
7775 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
7776 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
7777 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
7778 asoc->highest_tsn_inside_map = i;
7779 fnd = 1;
7780 break;
7781 }
7782 }
7783 if (!fnd) {
7784 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7785 }
7786
7787 /*
7788 * Question, should we go through the delivery queue? The only
7789 * reason things are on here is the app not reading OR a p-d-api up.
7790 * An attacker COULD send enough in to initiate the PD-API and then
7791 * send a bunch of stuff to other streams... these would wind up on
7792 * the delivery queue.. and then we would not get to them. But in
7793 * order to do this I then have to back-track and un-deliver
7794 * sequence numbers in streams.. el-yucko. I think for now we will
7795 * NOT look at the delivery queue and leave it to be something to
7796 * consider later. An alternative would be to abort the P-D-API with
7797 * a notification and then deliver the data.... Or another method
7798 * might be to keep track of how many times the situation occurs and
7799 * if we see a possible attack underway just abort the association.
7800 */
7801 #ifdef SCTP_DEBUG
7802 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7803 #endif
7804 /*
7805 * Now do we need to find a new
7806 * asoc->highest_tsn_inside_map?
7807 */
7808 asoc->last_revoke_count = cnt;
7809 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7810 /*sa_ignore NO_NULL_CHK*/
7811 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7812 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7813 }
7814 /*
7815 * Another issue, in un-setting the TSN's in the mapping array we
7816 * DID NOT adjust the highest_tsn marker. This will cause one of two
7817 * things to occur. It may cause us to do extra work in checking for
7818 * our mapping array movement. More importantly it may cause us to
7819 * SACK every datagram. This may not be a bad thing though since we
7820 * will recover once we get our cum-ack above and all this stuff we
7821 * dumped recovered.
7822 */
7823 }
7824
7825 void
7826 sctp_drain()
7827 {
7828 /*
7829 * We must walk the PCB lists for ALL associations here. The system
7830 * is LOW on MBUF's and needs help. This is where reneging will
7831 * occur. We really hope this does NOT happen!
7832 */
7833 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7834 VNET_ITERATOR_DECL(vnet_iter);
7835 #else
7836 struct sctp_inpcb *inp;
7837 struct sctp_tcb *stcb;
7838
7839 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7840 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7841 return;
7842 }
7843 #endif
7844 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7845 VNET_LIST_RLOCK_NOSLEEP();
7846 VNET_FOREACH(vnet_iter) {
7847 CURVNET_SET(vnet_iter);
7848 struct sctp_inpcb *inp;
7849 struct sctp_tcb *stcb;
7850 #endif
7851
7852 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7853 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7854 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7855 #ifdef VIMAGE
7856 continue;
7857 #else
7858 return;
7859 #endif
7860 }
7861 #endif
7862 SCTP_INP_INFO_RLOCK();
7863 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7864 /* For each endpoint */
7865 SCTP_INP_RLOCK(inp);
7866 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7867 /* For each association */
7868 SCTP_TCB_LOCK(stcb);
7869 sctp_drain_mbufs(stcb);
7870 SCTP_TCB_UNLOCK(stcb);
7871 }
7872 SCTP_INP_RUNLOCK(inp);
7873 }
7874 SCTP_INP_INFO_RUNLOCK();
7875 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7876 CURVNET_RESTORE();
7877 }
7878 VNET_LIST_RUNLOCK_NOSLEEP();
7879 #endif
7880 }
7881
7882 /*
7883 * start a new iterator
7884 * iterates through all endpoints and associations based on the pcb_state
7885 * flags and asoc_state. "af" (mandatory) is executed for all matching
7886 * assocs and "ef" (optional) is executed when the iterator completes.
7887 * "inpf" (optional) is executed for each new endpoint as it is being
7888 * iterated through. inpe (optional) is called when the inp completes
7889 * its way through all the stcbs.
7890 */
7891 int
7892 sctp_initiate_iterator(inp_func inpf,
7893 asoc_func af,
7894 inp_func inpe,
7895 uint32_t pcb_state,
7896 uint32_t pcb_features,
7897 uint32_t asoc_state,
7898 void *argp,
7899 uint32_t argi,
7900 end_func ef,
7901 struct sctp_inpcb *s_inp,
7902 uint8_t chunk_output_off)
7903 {
7904 struct sctp_iterator *it = NULL;
7905
7906 if (af == NULL) {
7907 return (-1);
7908 }
7909 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7910 SCTP_M_ITER);
7911 if (it == NULL) {
7912 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7913 return (ENOMEM);
7914 }
7915 memset(it, 0, sizeof(*it));
7916 it->function_assoc = af;
7917 it->function_inp = inpf;
7918 if (inpf)
7919 it->done_current_ep = 0;
7920 else
7921 it->done_current_ep = 1;
7922 it->function_atend = ef;
7923 it->pointer = argp;
7924 it->val = argi;
7925 it->pcb_flags = pcb_state;
7926 it->pcb_features = pcb_features;
7927 it->asoc_state = asoc_state;
7928 it->function_inp_end = inpe;
7929 it->no_chunk_output = chunk_output_off;
7930 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7931 it->vn = curvnet;
7932 #endif
7933 if (s_inp) {
7934 /* Assume lock is held here */
7935 it->inp = s_inp;
7936 SCTP_INP_INCR_REF(it->inp);
7937 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7938 } else {
7939 SCTP_INP_INFO_RLOCK();
7940 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7941 if (it->inp) {
7942 SCTP_INP_INCR_REF(it->inp);
7943 }
7944 SCTP_INP_INFO_RUNLOCK();
7945 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7946
7947 }
7948 SCTP_IPI_ITERATOR_WQ_LOCK();
7949
7950 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7951 if (sctp_it_ctl.iterator_running == 0) {
7952 sctp_wakeup_iterator();
7953 }
7954 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7955 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7956 return (0);
7957 }
7958