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 271230 2014-09-07 18:05:37Z 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(INET) || defined(INET6)
56 #if !defined(__Userspace_os_Windows)
57 #include <netinet/udp.h>
58 #endif
59 #endif
60 #ifdef INET6
61 #if defined(__Userspace__)
62 #include "user_ip6_var.h"
63 #else
64 #include <netinet6/ip6_var.h>
65 #endif
66 #endif
67 #if defined(__FreeBSD__)
68 #include <sys/sched.h>
69 #include <sys/smp.h>
70 #include <sys/unistd.h>
71 #endif
72 #if defined(__Userspace__)
73 #include <user_socketvar.h>
74 #endif
75
76 #if defined(__APPLE__)
77 #define APPLE_FILE_NO 4
78 #endif
79
80 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
81 VNET_DEFINE(struct sctp_base_info, system_base_info);
82 #else
83 struct sctp_base_info system_base_info;
84 #endif
85
86 #if defined(__Userspace__)
87 #if defined(INET) || defined(INET6)
88 struct ifaddrs *g_interfaces;
89 #endif
90 #endif
91 /* FIX: we don't handle multiple link local scopes */
92 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
93 #ifdef INET6
94 int
SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 * a,struct sockaddr_in6 * b)95 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
96 {
97 #ifdef SCTP_EMBEDDED_V6_SCOPE
98 #if defined(__APPLE__)
99 struct in6_addr tmp_a, tmp_b;
100
101 tmp_a = a->sin6_addr;
102 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
103 if (in6_embedscope(&tmp_a, a, NULL, NULL) != 0) {
104 #else
105 if (in6_embedscope(&tmp_a, a, NULL, NULL, NULL) != 0) {
106 #endif
107 return (0);
108 }
109 tmp_b = b->sin6_addr;
110 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
111 if (in6_embedscope(&tmp_b, b, NULL, NULL) != 0) {
112 #else
113 if (in6_embedscope(&tmp_b, b, NULL, NULL, NULL) != 0) {
114 #endif
115 return (0);
116 }
117 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
118 #elif defined(SCTP_KAME)
119 struct sockaddr_in6 tmp_a, tmp_b;
120
121 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
122 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
123 return (0);
124 }
125 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
126 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
127 return (0);
128 }
129 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
130 #else
131 struct in6_addr tmp_a, tmp_b;
132
133 tmp_a = a->sin6_addr;
134 if (in6_embedscope(&tmp_a, a) != 0) {
135 return (0);
136 }
137 tmp_b = b->sin6_addr;
138 if (in6_embedscope(&tmp_b, b) != 0) {
139 return (0);
140 }
141 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
142 #endif
143 #else
144 return (IN6_ARE_ADDR_EQUAL(&(a->sin6_addr), &(b->sin6_addr)));
145 #endif /* SCTP_EMBEDDED_V6_SCOPE */
146 }
147 #endif
148
149 void
150 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
151 {
152 /*
153 * We really don't need to lock this, but I will just because it
154 * does not hurt.
155 */
156 SCTP_INP_INFO_RLOCK();
157 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
158 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
159 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
160 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
161 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
162 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
163 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
164 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
165 SCTP_INP_INFO_RUNLOCK();
166 }
167
168 /*-
169 * Addresses are added to VRF's (Virtual Router's). For BSD we
170 * have only the default VRF 0. We maintain a hash list of
171 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
172 * these has a list of addresses. When we add a new address
173 * to a VRF we lookup the ifn/ifn_index, if the ifn does
174 * not exist we create it and add it to the list of IFN's
175 * within the VRF. Once we have the sctp_ifn, we add the
176 * address to the list. So we look something like:
177 *
178 * hash-vrf-table
179 * vrf-> ifn-> ifn -> ifn
180 * vrf |
181 * ... +--ifa-> ifa -> ifa
182 * vrf
183 *
184 * We keep these separate lists since the SCTP subsystem will
185 * point to these from its source address selection nets structure.
186 * When an address is deleted it does not happen right away on
187 * the SCTP side, it gets scheduled. What we do when a
188 * delete happens is immediately remove the address from
189 * the master list and decrement the refcount. As our
190 * addip iterator works through and frees the src address
191 * selection pointing to the sctp_ifa, eventually the refcount
192 * will reach 0 and we will delete it. Note that it is assumed
193 * that any locking on system level ifn/ifa is done at the
194 * caller of these functions and these routines will only
195 * lock the SCTP structures as they add or delete things.
196 *
197 * Other notes on VRF concepts.
198 * - An endpoint can be in multiple VRF's
199 * - An association lives within a VRF and only one VRF.
200 * - Any incoming packet we can deduce the VRF for by
201 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
202 * - Any downward send call or connect call must supply the
203 * VRF via ancillary data or via some sort of set default
204 * VRF socket option call (again for BSD no brainer since
205 * the VRF is always 0).
206 * - An endpoint may add multiple VRF's to it.
207 * - Listening sockets can accept associations in any
208 * of the VRF's they are in but the assoc will end up
209 * in only one VRF (gotten from the packet or connect/send).
210 *
211 */
212
213 struct sctp_vrf *
214 sctp_allocate_vrf(int vrf_id)
215 {
216 struct sctp_vrf *vrf = NULL;
217 struct sctp_vrflist *bucket;
218
219 /* First allocate the VRF structure */
220 vrf = sctp_find_vrf(vrf_id);
221 if (vrf) {
222 /* Already allocated */
223 return (vrf);
224 }
225 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
226 SCTP_M_VRF);
227 if (vrf == NULL) {
228 /* No memory */
229 #ifdef INVARIANTS
230 panic("No memory for VRF:%d", vrf_id);
231 #endif
232 return (NULL);
233 }
234 /* setup the VRF */
235 memset(vrf, 0, sizeof(struct sctp_vrf));
236 vrf->vrf_id = vrf_id;
237 LIST_INIT(&vrf->ifnlist);
238 vrf->total_ifa_count = 0;
239 vrf->refcount = 0;
240 /* now also setup table ids */
241 SCTP_INIT_VRF_TABLEID(vrf);
242 /* Init the HASH of addresses */
243 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
244 &vrf->vrf_addr_hashmark);
245 if (vrf->vrf_addr_hash == NULL) {
246 /* No memory */
247 #ifdef INVARIANTS
248 panic("No memory for VRF:%d", vrf_id);
249 #endif
250 SCTP_FREE(vrf, SCTP_M_VRF);
251 return (NULL);
252 }
253
254 /* Add it to the hash table */
255 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
256 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
257 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
258 return (vrf);
259 }
260
261
262 struct sctp_ifn *
263 sctp_find_ifn(void *ifn, uint32_t ifn_index)
264 {
265 struct sctp_ifn *sctp_ifnp;
266 struct sctp_ifnlist *hash_ifn_head;
267
268 /* We assume the lock is held for the addresses
269 * if that's wrong problems could occur :-)
270 */
271 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
272 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
273 if (sctp_ifnp->ifn_index == ifn_index) {
274 return (sctp_ifnp);
275 }
276 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
277 return (sctp_ifnp);
278 }
279 }
280 return (NULL);
281 }
282
283
284 struct sctp_vrf *
285 sctp_find_vrf(uint32_t vrf_id)
286 {
287 struct sctp_vrflist *bucket;
288 struct sctp_vrf *liste;
289
290 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
291 LIST_FOREACH(liste, bucket, next_vrf) {
292 if (vrf_id == liste->vrf_id) {
293 return (liste);
294 }
295 }
296 return (NULL);
297 }
298
299
300 void
301 sctp_free_vrf(struct sctp_vrf *vrf)
302 {
303 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
304 if (vrf->vrf_addr_hash) {
305 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
306 vrf->vrf_addr_hash = NULL;
307 }
308 /* We zero'd the count */
309 LIST_REMOVE(vrf, next_vrf);
310 SCTP_FREE(vrf, SCTP_M_VRF);
311 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
312 }
313 }
314
315
316 void
317 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
318 {
319 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
320 /* We zero'd the count */
321 if (sctp_ifnp->vrf) {
322 sctp_free_vrf(sctp_ifnp->vrf);
323 }
324 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
325 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
326 }
327 }
328
329
330 void
331 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
332 {
333 struct sctp_ifn *sctp_ifnp;
334
335 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
336 if (sctp_ifnp != NULL) {
337 sctp_ifnp->ifn_mtu = mtu;
338 }
339 }
340
341
342 void
343 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
344 {
345 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
346 /* We zero'd the count */
347 if (sctp_ifap->ifn_p) {
348 sctp_free_ifn(sctp_ifap->ifn_p);
349 }
350 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
351 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
352 }
353 }
354
355
356 static void
357 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
358 {
359 struct sctp_ifn *found;
360
361 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
362 if (found == NULL) {
363 /* Not in the list.. sorry */
364 return;
365 }
366 if (hold_addr_lock == 0)
367 SCTP_IPI_ADDR_WLOCK();
368 LIST_REMOVE(sctp_ifnp, next_bucket);
369 LIST_REMOVE(sctp_ifnp, next_ifn);
370 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
371 sctp_ifnp->registered_af);
372 if (hold_addr_lock == 0)
373 SCTP_IPI_ADDR_WUNLOCK();
374 /* Take away the reference, and possibly free it */
375 sctp_free_ifn(sctp_ifnp);
376 }
377
378
379 void
380 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
381 const char *if_name, uint32_t ifn_index)
382 {
383 struct sctp_vrf *vrf;
384 struct sctp_ifa *sctp_ifap;
385
386 SCTP_IPI_ADDR_RLOCK();
387 vrf = sctp_find_vrf(vrf_id);
388 if (vrf == NULL) {
389 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
390 goto out;
391
392 }
393 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
394 if (sctp_ifap == NULL) {
395 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
396 goto out;
397 }
398 if (sctp_ifap->ifn_p == NULL) {
399 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
400 goto out;
401 }
402 if (if_name) {
403 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
404 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
405 sctp_ifap->ifn_p->ifn_name, if_name);
406 goto out;
407 }
408 } else {
409 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
410 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
411 sctp_ifap->ifn_p->ifn_index, ifn_index);
412 goto out;
413 }
414 }
415
416 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
417 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
418 out:
419 SCTP_IPI_ADDR_RUNLOCK();
420 }
421
422
423 void
424 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
425 const char *if_name, uint32_t ifn_index)
426 {
427 struct sctp_vrf *vrf;
428 struct sctp_ifa *sctp_ifap;
429
430 SCTP_IPI_ADDR_RLOCK();
431 vrf = sctp_find_vrf(vrf_id);
432 if (vrf == NULL) {
433 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
434 goto out;
435
436 }
437 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
438 if (sctp_ifap == NULL) {
439 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
440 goto out;
441 }
442 if (sctp_ifap->ifn_p == NULL) {
443 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
444 goto out;
445 }
446 if (if_name) {
447 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
448 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
449 sctp_ifap->ifn_p->ifn_name, if_name);
450 goto out;
451 }
452 } else {
453 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
454 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
455 sctp_ifap->ifn_p->ifn_index, ifn_index);
456 goto out;
457 }
458 }
459
460 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
461 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
462 out:
463 SCTP_IPI_ADDR_RUNLOCK();
464 }
465
466
467 /*-
468 * Add an ifa to an ifn.
469 * Register the interface as necessary.
470 * NOTE: ADDR write lock MUST be held.
471 */
472 static void
473 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
474 {
475 int ifa_af;
476
477 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
478 sctp_ifap->ifn_p = sctp_ifnp;
479 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
480 /* update address counts */
481 sctp_ifnp->ifa_count++;
482 ifa_af = sctp_ifap->address.sa.sa_family;
483 switch (ifa_af) {
484 #ifdef INET
485 case AF_INET:
486 sctp_ifnp->num_v4++;
487 break;
488 #endif
489 #ifdef INET6
490 case AF_INET6:
491 sctp_ifnp->num_v6++;
492 break;
493 #endif
494 default:
495 break;
496 }
497 if (sctp_ifnp->ifa_count == 1) {
498 /* register the new interface */
499 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
500 sctp_ifnp->registered_af = ifa_af;
501 }
502 }
503
504
505 /*-
506 * Remove an ifa from its ifn.
507 * If no more addresses exist, remove the ifn too. Otherwise, re-register
508 * the interface based on the remaining address families left.
509 * NOTE: ADDR write lock MUST be held.
510 */
511 static void
512 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
513 {
514 LIST_REMOVE(sctp_ifap, next_ifa);
515 if (sctp_ifap->ifn_p) {
516 /* update address counts */
517 sctp_ifap->ifn_p->ifa_count--;
518 switch (sctp_ifap->address.sa.sa_family) {
519 #ifdef INET
520 case AF_INET:
521 sctp_ifap->ifn_p->num_v4--;
522 break;
523 #endif
524 #ifdef INET6
525 case AF_INET6:
526 sctp_ifap->ifn_p->num_v6--;
527 break;
528 #endif
529 default:
530 break;
531 }
532
533 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
534 /* remove the ifn, possibly freeing it */
535 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
536 } else {
537 /* re-register address family type, if needed */
538 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
539 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
540 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
541 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
542 sctp_ifap->ifn_p->registered_af = AF_INET;
543 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
544 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
545 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
546 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
547 sctp_ifap->ifn_p->registered_af = AF_INET6;
548 }
549 /* free the ifn refcount */
550 sctp_free_ifn(sctp_ifap->ifn_p);
551 }
552 sctp_ifap->ifn_p = NULL;
553 }
554 }
555
556
557 struct sctp_ifa *
558 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
559 uint32_t ifn_type, const char *if_name, void *ifa,
560 struct sockaddr *addr, uint32_t ifa_flags,
561 int dynamic_add)
562 {
563 struct sctp_vrf *vrf;
564 struct sctp_ifn *sctp_ifnp = NULL;
565 struct sctp_ifa *sctp_ifap = NULL;
566 struct sctp_ifalist *hash_addr_head;
567 struct sctp_ifnlist *hash_ifn_head;
568 uint32_t hash_of_addr;
569 int new_ifn_af = 0;
570
571 #ifdef SCTP_DEBUG
572 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
573 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
574 #endif
575 SCTP_IPI_ADDR_WLOCK();
576 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
577 if (sctp_ifnp) {
578 vrf = sctp_ifnp->vrf;
579 } else {
580 vrf = sctp_find_vrf(vrf_id);
581 if (vrf == NULL) {
582 vrf = sctp_allocate_vrf(vrf_id);
583 if (vrf == NULL) {
584 SCTP_IPI_ADDR_WUNLOCK();
585 return (NULL);
586 }
587 }
588 }
589 if (sctp_ifnp == NULL) {
590 /* build one and add it, can't hold lock
591 * until after malloc done though.
592 */
593 SCTP_IPI_ADDR_WUNLOCK();
594 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
595 sizeof(struct sctp_ifn), SCTP_M_IFN);
596 if (sctp_ifnp == NULL) {
597 #ifdef INVARIANTS
598 panic("No memory for IFN");
599 #endif
600 return (NULL);
601 }
602 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
603 sctp_ifnp->ifn_index = ifn_index;
604 sctp_ifnp->ifn_p = ifn;
605 sctp_ifnp->ifn_type = ifn_type;
606 sctp_ifnp->refcount = 0;
607 sctp_ifnp->vrf = vrf;
608 atomic_add_int(&vrf->refcount, 1);
609 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
610 if (if_name != NULL) {
611 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
612 } else {
613 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
614 }
615 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
616 LIST_INIT(&sctp_ifnp->ifalist);
617 SCTP_IPI_ADDR_WLOCK();
618 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
619 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
620 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
621 new_ifn_af = 1;
622 }
623 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
624 if (sctp_ifap) {
625 /* Hmm, it already exists? */
626 if ((sctp_ifap->ifn_p) &&
627 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
628 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
629 sctp_ifap->ifn_p->ifn_name, ifn_index,
630 (void *)sctp_ifap);
631 if (new_ifn_af) {
632 /* Remove the created one that we don't want */
633 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
634 }
635 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
636 /* easy to solve, just switch back to active */
637 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
638 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
639 sctp_ifap->ifn_p = sctp_ifnp;
640 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
641 }
642 exit_stage_left:
643 SCTP_IPI_ADDR_WUNLOCK();
644 return (sctp_ifap);
645 } else {
646 if (sctp_ifap->ifn_p) {
647 /*
648 * The last IFN gets the address, remove the
649 * old one
650 */
651 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
652 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
653 sctp_ifap->ifn_p->ifn_index, if_name,
654 ifn_index);
655 /* remove the address from the old ifn */
656 sctp_remove_ifa_from_ifn(sctp_ifap);
657 /* move the address over to the new ifn */
658 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
659 goto exit_stage_left;
660 } else {
661 /* repair ifnp which was NULL ? */
662 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
663 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
664 (void *)sctp_ifnp, (void *)sctp_ifap);
665 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
666 }
667 goto exit_stage_left;
668 }
669 }
670 SCTP_IPI_ADDR_WUNLOCK();
671 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
672 if (sctp_ifap == NULL) {
673 #ifdef INVARIANTS
674 panic("No memory for IFA");
675 #endif
676 return (NULL);
677 }
678 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
679 sctp_ifap->ifn_p = sctp_ifnp;
680 atomic_add_int(&sctp_ifnp->refcount, 1);
681 sctp_ifap->vrf_id = vrf_id;
682 sctp_ifap->ifa = ifa;
683 #ifdef HAVE_SA_LEN
684 memcpy(&sctp_ifap->address, addr, addr->sa_len);
685 #else
686 switch (addr->sa_family) {
687 #ifdef INET
688 case AF_INET:
689 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in));
690 break;
691 #endif
692 #ifdef INET6
693 case AF_INET6:
694 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in6));
695 break;
696 #endif
697 #if defined(__Userspace__)
698 case AF_CONN:
699 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_conn));
700 break;
701 #endif
702 default:
703 /* TSNH */
704 break;
705 }
706 #endif
707 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
708 sctp_ifap->flags = ifa_flags;
709 /* Set scope */
710 switch (sctp_ifap->address.sa.sa_family) {
711 #ifdef INET
712 case AF_INET:
713 {
714 struct sockaddr_in *sin;
715
716 sin = &sctp_ifap->address.sin;
717 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
718 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
719 sctp_ifap->src_is_loop = 1;
720 }
721 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
722 sctp_ifap->src_is_priv = 1;
723 }
724 sctp_ifnp->num_v4++;
725 if (new_ifn_af)
726 new_ifn_af = AF_INET;
727 break;
728 }
729 #endif
730 #ifdef INET6
731 case AF_INET6:
732 {
733 /* ok to use deprecated addresses? */
734 struct sockaddr_in6 *sin6;
735
736 sin6 = &sctp_ifap->address.sin6;
737 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
738 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
739 sctp_ifap->src_is_loop = 1;
740 }
741 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
742 sctp_ifap->src_is_priv = 1;
743 }
744 sctp_ifnp->num_v6++;
745 if (new_ifn_af)
746 new_ifn_af = AF_INET6;
747 break;
748 }
749 #endif
750 #if defined(__Userspace__)
751 case AF_CONN:
752 if (new_ifn_af)
753 new_ifn_af = AF_CONN;
754 break;
755 #endif
756 default:
757 new_ifn_af = 0;
758 break;
759 }
760 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
761
762 if ((sctp_ifap->src_is_priv == 0) &&
763 (sctp_ifap->src_is_loop == 0)) {
764 sctp_ifap->src_is_glob = 1;
765 }
766 SCTP_IPI_ADDR_WLOCK();
767 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
768 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
769 sctp_ifap->refcount = 1;
770 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
771 sctp_ifnp->ifa_count++;
772 vrf->total_ifa_count++;
773 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
774 if (new_ifn_af) {
775 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
776 sctp_ifnp->registered_af = new_ifn_af;
777 }
778 SCTP_IPI_ADDR_WUNLOCK();
779 if (dynamic_add) {
780 /* Bump up the refcount so that when the timer
781 * completes it will drop back down.
782 */
783 struct sctp_laddr *wi;
784
785 atomic_add_int(&sctp_ifap->refcount, 1);
786 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
787 if (wi == NULL) {
788 /*
789 * Gak, what can we do? We have lost an address
790 * change can you say HOSED?
791 */
792 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
793 /* Opps, must decrement the count */
794 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
795 if_name);
796 return (NULL);
797 }
798 SCTP_INCR_LADDR_COUNT();
799 bzero(wi, sizeof(*wi));
800 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
801 wi->ifa = sctp_ifap;
802 wi->action = SCTP_ADD_IP_ADDRESS;
803
804 SCTP_WQ_ADDR_LOCK();
805 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
806 SCTP_WQ_ADDR_UNLOCK();
807
808 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
809 (struct sctp_inpcb *)NULL,
810 (struct sctp_tcb *)NULL,
811 (struct sctp_nets *)NULL);
812 } else {
813 /* it's ready for use */
814 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
815 }
816 return (sctp_ifap);
817 }
818
819 void
820 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
821 uint32_t ifn_index, const char *if_name)
822 {
823 struct sctp_vrf *vrf;
824 struct sctp_ifa *sctp_ifap = NULL;
825
826 SCTP_IPI_ADDR_WLOCK();
827 vrf = sctp_find_vrf(vrf_id);
828 if (vrf == NULL) {
829 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
830 goto out_now;
831 }
832
833 #ifdef SCTP_DEBUG
834 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
835 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
836 #endif
837 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
838 if (sctp_ifap) {
839 /* Validate the delete */
840 if (sctp_ifap->ifn_p) {
841 int valid = 0;
842 /*-
843 * The name has priority over the ifn_index
844 * if its given. We do this especially for
845 * panda who might recycle indexes fast.
846 */
847 if (if_name) {
848 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
849 /* They match its a correct delete */
850 valid = 1;
851 }
852 }
853 if (!valid) {
854 /* last ditch check ifn_index */
855 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
856 valid = 1;
857 }
858 }
859 if (!valid) {
860 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
861 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
862 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
863 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
864 SCTP_IPI_ADDR_WUNLOCK();
865 return;
866 }
867 }
868 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
869 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
870 /*
871 * We don't set the flag. This means that the structure will
872 * hang around in EP's that have bound specific to it until
873 * they close. This gives us TCP like behavior if someone
874 * removes an address (or for that matter adds it right back).
875 */
876 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
877 vrf->total_ifa_count--;
878 LIST_REMOVE(sctp_ifap, next_bucket);
879 sctp_remove_ifa_from_ifn(sctp_ifap);
880 }
881 #ifdef SCTP_DEBUG
882 else {
883 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
884 ifn_index);
885 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
886 }
887 #endif
888
889 out_now:
890 SCTP_IPI_ADDR_WUNLOCK();
891 if (sctp_ifap) {
892 struct sctp_laddr *wi;
893
894 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
895 if (wi == NULL) {
896 /*
897 * Gak, what can we do? We have lost an address
898 * change can you say HOSED?
899 */
900 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
901
902 /* Oops, must decrement the count */
903 sctp_free_ifa(sctp_ifap);
904 return;
905 }
906 SCTP_INCR_LADDR_COUNT();
907 bzero(wi, sizeof(*wi));
908 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
909 wi->ifa = sctp_ifap;
910 wi->action = SCTP_DEL_IP_ADDRESS;
911 SCTP_WQ_ADDR_LOCK();
912 /*
913 * Should this really be a tailq? As it is we will process the
914 * newest first :-0
915 */
916 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
917 SCTP_WQ_ADDR_UNLOCK();
918
919 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
920 (struct sctp_inpcb *)NULL,
921 (struct sctp_tcb *)NULL,
922 (struct sctp_nets *)NULL);
923 }
924 return;
925 }
926
927
928 static int
929 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
930 {
931 int loopback_scope;
932 #if defined(INET)
933 int ipv4_local_scope, ipv4_addr_legal;
934 #endif
935 #if defined(INET6)
936 int local_scope, site_scope, ipv6_addr_legal;
937 #endif
938 #if defined(__Userspace__)
939 int conn_addr_legal;
940 #endif
941 struct sctp_vrf *vrf;
942 struct sctp_ifn *sctp_ifn;
943 struct sctp_ifa *sctp_ifa;
944
945 loopback_scope = stcb->asoc.scope.loopback_scope;
946 #if defined(INET)
947 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
948 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
949 #endif
950 #if defined(INET6)
951 local_scope = stcb->asoc.scope.local_scope;
952 site_scope = stcb->asoc.scope.site_scope;
953 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
954 #endif
955 #if defined(__Userspace__)
956 conn_addr_legal = stcb->asoc.scope.conn_addr_legal;
957 #endif
958
959 SCTP_IPI_ADDR_RLOCK();
960 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
961 if (vrf == NULL) {
962 /* no vrf, no addresses */
963 SCTP_IPI_ADDR_RUNLOCK();
964 return (0);
965 }
966
967 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
968 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
969 if ((loopback_scope == 0) &&
970 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
971 continue;
972 }
973 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
974 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
975 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
976 /* We allow pending addresses, where we
977 * have sent an asconf-add to be considered
978 * valid.
979 */
980 continue;
981 }
982 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
983 continue;
984 }
985 switch (sctp_ifa->address.sa.sa_family) {
986 #ifdef INET
987 case AF_INET:
988 if (ipv4_addr_legal) {
989 struct sockaddr_in *sin, *rsin;
990
991 sin = &sctp_ifa->address.sin;
992 rsin = (struct sockaddr_in *)to;
993 if ((ipv4_local_scope == 0) &&
994 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
995 continue;
996 }
997 #if defined(__FreeBSD__)
998 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
999 &sin->sin_addr) != 0) {
1000 continue;
1001 }
1002 #endif
1003 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1004 SCTP_IPI_ADDR_RUNLOCK();
1005 return (1);
1006 }
1007 }
1008 break;
1009 #endif
1010 #ifdef INET6
1011 case AF_INET6:
1012 if (ipv6_addr_legal) {
1013 struct sockaddr_in6 *sin6, *rsin6;
1014 #if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME)
1015 struct sockaddr_in6 lsa6;
1016 #endif
1017 sin6 = &sctp_ifa->address.sin6;
1018 rsin6 = (struct sockaddr_in6 *)to;
1019 #if defined(__FreeBSD__)
1020 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
1021 &sin6->sin6_addr) != 0) {
1022 continue;
1023 }
1024 #endif
1025 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1026 if (local_scope == 0)
1027 continue;
1028 #if defined(SCTP_EMBEDDED_V6_SCOPE)
1029 if (sin6->sin6_scope_id == 0) {
1030 #ifdef SCTP_KAME
1031 if (sa6_recoverscope(sin6) != 0)
1032 continue;
1033 #else
1034 lsa6 = *sin6;
1035 if (in6_recoverscope(&lsa6,
1036 &lsa6.sin6_addr,
1037 NULL))
1038 continue;
1039 sin6 = &lsa6;
1040 #endif /* SCTP_KAME */
1041 }
1042 #endif /* SCTP_EMBEDDED_V6_SCOPE */
1043 }
1044 if ((site_scope == 0) &&
1045 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1046 continue;
1047 }
1048 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1049 SCTP_IPI_ADDR_RUNLOCK();
1050 return (1);
1051 }
1052 }
1053 break;
1054 #endif
1055 #if defined(__Userspace__)
1056 case AF_CONN:
1057 if (conn_addr_legal) {
1058 struct sockaddr_conn *sconn, *rsconn;
1059
1060 sconn = &sctp_ifa->address.sconn;
1061 rsconn = (struct sockaddr_conn *)to;
1062 if (sconn->sconn_addr == rsconn->sconn_addr) {
1063 SCTP_IPI_ADDR_RUNLOCK();
1064 return (1);
1065 }
1066 }
1067 break;
1068 #endif
1069 default:
1070 /* TSNH */
1071 break;
1072 }
1073 }
1074 }
1075 } else {
1076 struct sctp_laddr *laddr;
1077
1078 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1079 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1080 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1081 continue;
1082 }
1083 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1084 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1085 /* We allow pending addresses, where we
1086 * have sent an asconf-add to be considered
1087 * valid.
1088 */
1089 continue;
1090 }
1091 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1092 continue;
1093 }
1094 switch (to->sa_family) {
1095 #ifdef INET
1096 case AF_INET:
1097 {
1098 struct sockaddr_in *sin, *rsin;
1099
1100 sin = &laddr->ifa->address.sin;
1101 rsin = (struct sockaddr_in *)to;
1102 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1103 SCTP_IPI_ADDR_RUNLOCK();
1104 return (1);
1105 }
1106 break;
1107 }
1108 #endif
1109 #ifdef INET6
1110 case AF_INET6:
1111 {
1112 struct sockaddr_in6 *sin6, *rsin6;
1113
1114 sin6 = &laddr->ifa->address.sin6;
1115 rsin6 = (struct sockaddr_in6 *)to;
1116 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1117 SCTP_IPI_ADDR_RUNLOCK();
1118 return (1);
1119 }
1120 break;
1121 }
1122
1123 #endif
1124 #if defined(__Userspace__)
1125 case AF_CONN:
1126 {
1127 struct sockaddr_conn *sconn, *rsconn;
1128
1129 sconn = &laddr->ifa->address.sconn;
1130 rsconn = (struct sockaddr_conn *)to;
1131 if (sconn->sconn_addr == rsconn->sconn_addr) {
1132 SCTP_IPI_ADDR_RUNLOCK();
1133 return (1);
1134 }
1135 break;
1136 }
1137 #endif
1138 default:
1139 /* TSNH */
1140 break;
1141 }
1142
1143 }
1144 }
1145 SCTP_IPI_ADDR_RUNLOCK();
1146 return (0);
1147 }
1148
1149
1150 static struct sctp_tcb *
1151 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1152 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1153 {
1154 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1155 /*
1156 * If we support the TCP model, then we must now dig through to see
1157 * if we can find our endpoint in the list of tcp ep's.
1158 */
1159 uint16_t lport, rport;
1160 struct sctppcbhead *ephead;
1161 struct sctp_inpcb *inp;
1162 struct sctp_laddr *laddr;
1163 struct sctp_tcb *stcb;
1164 struct sctp_nets *net;
1165 #ifdef SCTP_MVRF
1166 int fnd, i;
1167 #endif
1168
1169 if ((to == NULL) || (from == NULL)) {
1170 return (NULL);
1171 }
1172
1173 switch (to->sa_family) {
1174 #ifdef INET
1175 case AF_INET:
1176 if (from->sa_family == AF_INET) {
1177 lport = ((struct sockaddr_in *)to)->sin_port;
1178 rport = ((struct sockaddr_in *)from)->sin_port;
1179 } else {
1180 return (NULL);
1181 }
1182 break;
1183 #endif
1184 #ifdef INET6
1185 case AF_INET6:
1186 if (from->sa_family == AF_INET6) {
1187 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1188 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1189 } else {
1190 return (NULL);
1191 }
1192 break;
1193 #endif
1194 #if defined(__Userspace__)
1195 case AF_CONN:
1196 if (from->sa_family == AF_CONN) {
1197 lport = ((struct sockaddr_conn *)to)->sconn_port;
1198 rport = ((struct sockaddr_conn *)from)->sconn_port;
1199 } else {
1200 return (NULL);
1201 }
1202 break;
1203 #endif
1204 default:
1205 return (NULL);
1206 }
1207 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1208 /*
1209 * Ok now for each of the guys in this bucket we must look and see:
1210 * - Does the remote port match. - Does there single association's
1211 * addresses match this address (to). If so we update p_ep to point
1212 * to this ep and return the tcb from it.
1213 */
1214 LIST_FOREACH(inp, ephead, sctp_hash) {
1215 SCTP_INP_RLOCK(inp);
1216 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1217 SCTP_INP_RUNLOCK(inp);
1218 continue;
1219 }
1220 if (lport != inp->sctp_lport) {
1221 SCTP_INP_RUNLOCK(inp);
1222 continue;
1223 }
1224 #if defined(__FreeBSD__)
1225 switch (to->sa_family) {
1226 #ifdef INET
1227 case AF_INET:
1228 {
1229 struct sockaddr_in *sin;
1230
1231 sin = (struct sockaddr_in *)to;
1232 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1233 &sin->sin_addr) != 0) {
1234 SCTP_INP_RUNLOCK(inp);
1235 continue;
1236 }
1237 break;
1238 }
1239 #endif
1240 #ifdef INET6
1241 case AF_INET6:
1242 {
1243 struct sockaddr_in6 *sin6;
1244
1245 sin6 = (struct sockaddr_in6 *)to;
1246 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1247 &sin6->sin6_addr) != 0) {
1248 SCTP_INP_RUNLOCK(inp);
1249 continue;
1250 }
1251 break;
1252 }
1253 #endif
1254 default:
1255 SCTP_INP_RUNLOCK(inp);
1256 continue;
1257 }
1258 #endif
1259 #ifdef SCTP_MVRF
1260 fnd = 0;
1261 for (i = 0; i < inp->num_vrfs; i++) {
1262 if (inp->m_vrf_ids[i] == vrf_id) {
1263 fnd = 1;
1264 break;
1265 }
1266 }
1267 if (fnd == 0) {
1268 SCTP_INP_RUNLOCK(inp);
1269 continue;
1270 }
1271 #else
1272 if (inp->def_vrf_id != vrf_id) {
1273 SCTP_INP_RUNLOCK(inp);
1274 continue;
1275 }
1276 #endif
1277 /* check to see if the ep has one of the addresses */
1278 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1279 /* We are NOT bound all, so look further */
1280 int match = 0;
1281
1282 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1283
1284 if (laddr->ifa == NULL) {
1285 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1286 continue;
1287 }
1288 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1289 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1290 continue;
1291 }
1292 if (laddr->ifa->address.sa.sa_family ==
1293 to->sa_family) {
1294 /* see if it matches */
1295 #ifdef INET
1296 if (from->sa_family == AF_INET) {
1297 struct sockaddr_in *intf_addr, *sin;
1298
1299 intf_addr = &laddr->ifa->address.sin;
1300 sin = (struct sockaddr_in *)to;
1301 if (sin->sin_addr.s_addr ==
1302 intf_addr->sin_addr.s_addr) {
1303 match = 1;
1304 break;
1305 }
1306 }
1307 #endif
1308 #ifdef INET6
1309 if (from->sa_family == AF_INET6) {
1310 struct sockaddr_in6 *intf_addr6;
1311 struct sockaddr_in6 *sin6;
1312
1313 sin6 = (struct sockaddr_in6 *)
1314 to;
1315 intf_addr6 = &laddr->ifa->address.sin6;
1316
1317 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1318 intf_addr6)) {
1319 match = 1;
1320 break;
1321 }
1322 }
1323 #endif
1324 #if defined(__Userspace__)
1325 if (from->sa_family == AF_CONN) {
1326 struct sockaddr_conn *intf_addr, *sconn;
1327
1328 intf_addr = &laddr->ifa->address.sconn;
1329 sconn = (struct sockaddr_conn *)to;
1330 if (sconn->sconn_addr ==
1331 intf_addr->sconn_addr) {
1332 match = 1;
1333 break;
1334 }
1335 }
1336 #endif
1337 }
1338 }
1339 if (match == 0) {
1340 /* This endpoint does not have this address */
1341 SCTP_INP_RUNLOCK(inp);
1342 continue;
1343 }
1344 }
1345 /*
1346 * Ok if we hit here the ep has the address, does it hold
1347 * the tcb?
1348 */
1349 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1350 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1351 if (stcb == NULL) {
1352 SCTP_INP_RUNLOCK(inp);
1353 continue;
1354 }
1355 SCTP_TCB_LOCK(stcb);
1356 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1357 SCTP_TCB_UNLOCK(stcb);
1358 SCTP_INP_RUNLOCK(inp);
1359 continue;
1360 }
1361 if (stcb->rport != rport) {
1362 /* remote port does not match. */
1363 SCTP_TCB_UNLOCK(stcb);
1364 SCTP_INP_RUNLOCK(inp);
1365 continue;
1366 }
1367 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1368 SCTP_TCB_UNLOCK(stcb);
1369 SCTP_INP_RUNLOCK(inp);
1370 continue;
1371 }
1372 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1373 SCTP_TCB_UNLOCK(stcb);
1374 SCTP_INP_RUNLOCK(inp);
1375 continue;
1376 }
1377 /* Does this TCB have a matching address? */
1378 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1379
1380 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1381 /* not the same family, can't be a match */
1382 continue;
1383 }
1384 switch (from->sa_family) {
1385 #ifdef INET
1386 case AF_INET:
1387 {
1388 struct sockaddr_in *sin, *rsin;
1389
1390 sin = (struct sockaddr_in *)&net->ro._l_addr;
1391 rsin = (struct sockaddr_in *)from;
1392 if (sin->sin_addr.s_addr ==
1393 rsin->sin_addr.s_addr) {
1394 /* found it */
1395 if (netp != NULL) {
1396 *netp = net;
1397 }
1398 /* Update the endpoint pointer */
1399 *inp_p = inp;
1400 SCTP_INP_RUNLOCK(inp);
1401 return (stcb);
1402 }
1403 break;
1404 }
1405 #endif
1406 #ifdef INET6
1407 case AF_INET6:
1408 {
1409 struct sockaddr_in6 *sin6, *rsin6;
1410
1411 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1412 rsin6 = (struct sockaddr_in6 *)from;
1413 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1414 rsin6)) {
1415 /* found it */
1416 if (netp != NULL) {
1417 *netp = net;
1418 }
1419 /* Update the endpoint pointer */
1420 *inp_p = inp;
1421 SCTP_INP_RUNLOCK(inp);
1422 return (stcb);
1423 }
1424 break;
1425 }
1426 #endif
1427 #if defined(__Userspace__)
1428 case AF_CONN:
1429 {
1430 struct sockaddr_conn *sconn, *rsconn;
1431
1432 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1433 rsconn = (struct sockaddr_conn *)from;
1434 if (sconn->sconn_addr == rsconn->sconn_addr) {
1435 /* found it */
1436 if (netp != NULL) {
1437 *netp = net;
1438 }
1439 /* Update the endpoint pointer */
1440 *inp_p = inp;
1441 SCTP_INP_RUNLOCK(inp);
1442 return (stcb);
1443 }
1444 break;
1445 }
1446 #endif
1447 default:
1448 /* TSNH */
1449 break;
1450 }
1451 }
1452 SCTP_TCB_UNLOCK(stcb);
1453 SCTP_INP_RUNLOCK(inp);
1454 }
1455 return (NULL);
1456 }
1457
1458
1459 /*
1460 * rules for use
1461 *
1462 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1463 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1464 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1465 * NULL.
1466 */
1467
1468 struct sctp_tcb *
1469 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1470 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1471 {
1472 struct sctpasochead *head;
1473 struct sctp_inpcb *inp;
1474 struct sctp_tcb *stcb = NULL;
1475 struct sctp_nets *net;
1476 uint16_t rport;
1477
1478 inp = *inp_p;
1479 switch (remote->sa_family) {
1480 #ifdef INET
1481 case AF_INET:
1482 rport = (((struct sockaddr_in *)remote)->sin_port);
1483 break;
1484 #endif
1485 #ifdef INET6
1486 case AF_INET6:
1487 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1488 break;
1489 #endif
1490 #if defined(__Userspace__)
1491 case AF_CONN:
1492 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1493 break;
1494 #endif
1495 default:
1496 return (NULL);
1497 }
1498 if (locked_tcb) {
1499 /*
1500 * UN-lock so we can do proper locking here this occurs when
1501 * called from load_addresses_from_init.
1502 */
1503 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1504 SCTP_TCB_UNLOCK(locked_tcb);
1505 }
1506 SCTP_INP_INFO_RLOCK();
1507 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1508 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1509 /*-
1510 * Now either this guy is our listener or it's the
1511 * connector. If it is the one that issued the connect, then
1512 * it's only chance is to be the first TCB in the list. If
1513 * it is the acceptor, then do the special_lookup to hash
1514 * and find the real inp.
1515 */
1516 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1517 /* to is peer addr, from is my addr */
1518 #ifndef SCTP_MVRF
1519 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1520 netp, inp->def_vrf_id);
1521 if ((stcb != NULL) && (locked_tcb == NULL)) {
1522 /* we have a locked tcb, lower refcount */
1523 SCTP_INP_DECR_REF(inp);
1524 }
1525 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1526 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1527 SCTP_TCB_LOCK(locked_tcb);
1528 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1529 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1530 }
1531 #else
1532 /*-
1533 * MVRF is tricky, we must look in every VRF
1534 * the endpoint has.
1535 */
1536 int i;
1537
1538 for (i = 0; i < inp->num_vrfs; i++) {
1539 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1540 netp, inp->m_vrf_ids[i]);
1541 if ((stcb != NULL) && (locked_tcb == NULL)) {
1542 /* we have a locked tcb, lower refcount */
1543 SCTP_INP_DECR_REF(inp);
1544 break;
1545 }
1546 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1547 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1548 SCTP_TCB_LOCK(locked_tcb);
1549 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1550 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1551 break;
1552 }
1553 }
1554 #endif
1555 SCTP_INP_INFO_RUNLOCK();
1556 return (stcb);
1557 } else {
1558 SCTP_INP_WLOCK(inp);
1559 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1560 goto null_return;
1561 }
1562 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1563 if (stcb == NULL) {
1564 goto null_return;
1565 }
1566 SCTP_TCB_LOCK(stcb);
1567
1568 if (stcb->rport != rport) {
1569 /* remote port does not match. */
1570 SCTP_TCB_UNLOCK(stcb);
1571 goto null_return;
1572 }
1573 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1574 SCTP_TCB_UNLOCK(stcb);
1575 goto null_return;
1576 }
1577 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1578 SCTP_TCB_UNLOCK(stcb);
1579 goto null_return;
1580 }
1581 /* now look at the list of remote addresses */
1582 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1583 #ifdef INVARIANTS
1584 if (net == (TAILQ_NEXT(net, sctp_next))) {
1585 panic("Corrupt net list");
1586 }
1587 #endif
1588 if (net->ro._l_addr.sa.sa_family !=
1589 remote->sa_family) {
1590 /* not the same family */
1591 continue;
1592 }
1593 switch (remote->sa_family) {
1594 #ifdef INET
1595 case AF_INET:
1596 {
1597 struct sockaddr_in *sin, *rsin;
1598
1599 sin = (struct sockaddr_in *)
1600 &net->ro._l_addr;
1601 rsin = (struct sockaddr_in *)remote;
1602 if (sin->sin_addr.s_addr ==
1603 rsin->sin_addr.s_addr) {
1604 /* found it */
1605 if (netp != NULL) {
1606 *netp = net;
1607 }
1608 if (locked_tcb == NULL) {
1609 SCTP_INP_DECR_REF(inp);
1610 } else if (locked_tcb != stcb) {
1611 SCTP_TCB_LOCK(locked_tcb);
1612 }
1613 if (locked_tcb) {
1614 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1615 }
1616
1617 SCTP_INP_WUNLOCK(inp);
1618 SCTP_INP_INFO_RUNLOCK();
1619 return (stcb);
1620 }
1621 break;
1622 }
1623 #endif
1624 #ifdef INET6
1625 case AF_INET6:
1626 {
1627 struct sockaddr_in6 *sin6, *rsin6;
1628
1629 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1630 rsin6 = (struct sockaddr_in6 *)remote;
1631 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1632 rsin6)) {
1633 /* found it */
1634 if (netp != NULL) {
1635 *netp = net;
1636 }
1637 if (locked_tcb == NULL) {
1638 SCTP_INP_DECR_REF(inp);
1639 } else if (locked_tcb != stcb) {
1640 SCTP_TCB_LOCK(locked_tcb);
1641 }
1642 if (locked_tcb) {
1643 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1644 }
1645 SCTP_INP_WUNLOCK(inp);
1646 SCTP_INP_INFO_RUNLOCK();
1647 return (stcb);
1648 }
1649 break;
1650 }
1651 #endif
1652 #if defined(__Userspace__)
1653 case AF_CONN:
1654 {
1655 struct sockaddr_conn *sconn, *rsconn;
1656
1657 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1658 rsconn = (struct sockaddr_conn *)remote;
1659 if (sconn->sconn_addr == rsconn->sconn_addr) {
1660 /* found it */
1661 if (netp != NULL) {
1662 *netp = net;
1663 }
1664 if (locked_tcb == NULL) {
1665 SCTP_INP_DECR_REF(inp);
1666 } else if (locked_tcb != stcb) {
1667 SCTP_TCB_LOCK(locked_tcb);
1668 }
1669 if (locked_tcb) {
1670 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1671 }
1672 SCTP_INP_WUNLOCK(inp);
1673 SCTP_INP_INFO_RUNLOCK();
1674 return (stcb);
1675 }
1676 break;
1677 }
1678 #endif
1679 default:
1680 /* TSNH */
1681 break;
1682 }
1683 }
1684 SCTP_TCB_UNLOCK(stcb);
1685 }
1686 } else {
1687 SCTP_INP_WLOCK(inp);
1688 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1689 goto null_return;
1690 }
1691 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1692 inp->sctp_hashmark)];
1693 if (head == NULL) {
1694 goto null_return;
1695 }
1696 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1697 if (stcb->rport != rport) {
1698 /* remote port does not match */
1699 continue;
1700 }
1701 SCTP_TCB_LOCK(stcb);
1702 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1703 SCTP_TCB_UNLOCK(stcb);
1704 continue;
1705 }
1706 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1707 SCTP_TCB_UNLOCK(stcb);
1708 continue;
1709 }
1710 /* now look at the list of remote addresses */
1711 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1712 #ifdef INVARIANTS
1713 if (net == (TAILQ_NEXT(net, sctp_next))) {
1714 panic("Corrupt net list");
1715 }
1716 #endif
1717 if (net->ro._l_addr.sa.sa_family !=
1718 remote->sa_family) {
1719 /* not the same family */
1720 continue;
1721 }
1722 switch (remote->sa_family) {
1723 #ifdef INET
1724 case AF_INET:
1725 {
1726 struct sockaddr_in *sin, *rsin;
1727
1728 sin = (struct sockaddr_in *)
1729 &net->ro._l_addr;
1730 rsin = (struct sockaddr_in *)remote;
1731 if (sin->sin_addr.s_addr ==
1732 rsin->sin_addr.s_addr) {
1733 /* found it */
1734 if (netp != NULL) {
1735 *netp = net;
1736 }
1737 if (locked_tcb == NULL) {
1738 SCTP_INP_DECR_REF(inp);
1739 } else if (locked_tcb != stcb) {
1740 SCTP_TCB_LOCK(locked_tcb);
1741 }
1742 if (locked_tcb) {
1743 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1744 }
1745 SCTP_INP_WUNLOCK(inp);
1746 SCTP_INP_INFO_RUNLOCK();
1747 return (stcb);
1748 }
1749 break;
1750 }
1751 #endif
1752 #ifdef INET6
1753 case AF_INET6:
1754 {
1755 struct sockaddr_in6 *sin6, *rsin6;
1756
1757 sin6 = (struct sockaddr_in6 *)
1758 &net->ro._l_addr;
1759 rsin6 = (struct sockaddr_in6 *)remote;
1760 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1761 rsin6)) {
1762 /* found it */
1763 if (netp != NULL) {
1764 *netp = net;
1765 }
1766 if (locked_tcb == NULL) {
1767 SCTP_INP_DECR_REF(inp);
1768 } else if (locked_tcb != stcb) {
1769 SCTP_TCB_LOCK(locked_tcb);
1770 }
1771 if (locked_tcb) {
1772 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1773 }
1774 SCTP_INP_WUNLOCK(inp);
1775 SCTP_INP_INFO_RUNLOCK();
1776 return (stcb);
1777 }
1778 break;
1779 }
1780 #endif
1781 #if defined(__Userspace__)
1782 case AF_CONN:
1783 {
1784 struct sockaddr_conn *sconn, *rsconn;
1785
1786 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1787 rsconn = (struct sockaddr_conn *)remote;
1788 if (sconn->sconn_addr == rsconn->sconn_addr) {
1789 /* found it */
1790 if (netp != NULL) {
1791 *netp = net;
1792 }
1793 if (locked_tcb == NULL) {
1794 SCTP_INP_DECR_REF(inp);
1795 } else if (locked_tcb != stcb) {
1796 SCTP_TCB_LOCK(locked_tcb);
1797 }
1798 if (locked_tcb) {
1799 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1800 }
1801 SCTP_INP_WUNLOCK(inp);
1802 SCTP_INP_INFO_RUNLOCK();
1803 return (stcb);
1804 }
1805 break;
1806 }
1807 #endif
1808 default:
1809 /* TSNH */
1810 break;
1811 }
1812 }
1813 SCTP_TCB_UNLOCK(stcb);
1814 }
1815 }
1816 null_return:
1817 /* clean up for returning null */
1818 if (locked_tcb) {
1819 SCTP_TCB_LOCK(locked_tcb);
1820 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1821 }
1822 SCTP_INP_WUNLOCK(inp);
1823 SCTP_INP_INFO_RUNLOCK();
1824 /* not found */
1825 return (NULL);
1826 }
1827
1828
1829 /*
1830 * Find an association for a specific endpoint using the association id given
1831 * out in the COMM_UP notification
1832 */
1833 struct sctp_tcb *
1834 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1835 {
1836 /*
1837 * Use my the assoc_id to find a endpoint
1838 */
1839 struct sctpasochead *head;
1840 struct sctp_tcb *stcb;
1841 uint32_t id;
1842
1843 if (inp == NULL) {
1844 SCTP_PRINTF("TSNH ep_associd\n");
1845 return (NULL);
1846 }
1847 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1848 SCTP_PRINTF("TSNH ep_associd0\n");
1849 return (NULL);
1850 }
1851 id = (uint32_t)asoc_id;
1852 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1853 if (head == NULL) {
1854 /* invalid id TSNH */
1855 SCTP_PRINTF("TSNH ep_associd1\n");
1856 return (NULL);
1857 }
1858 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1859 if (stcb->asoc.assoc_id == id) {
1860 if (inp != stcb->sctp_ep) {
1861 /*
1862 * some other guy has the same id active (id
1863 * collision ??).
1864 */
1865 SCTP_PRINTF("TSNH ep_associd2\n");
1866 continue;
1867 }
1868 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1869 continue;
1870 }
1871 if (want_lock) {
1872 SCTP_TCB_LOCK(stcb);
1873 }
1874 return (stcb);
1875 }
1876 }
1877 return (NULL);
1878 }
1879
1880
1881 struct sctp_tcb *
1882 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1883 {
1884 struct sctp_tcb *stcb;
1885
1886 SCTP_INP_RLOCK(inp);
1887 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1888 SCTP_INP_RUNLOCK(inp);
1889 return (stcb);
1890 }
1891
1892
1893 /*
1894 * Endpoint probe expects that the INP_INFO is locked.
1895 */
1896 static struct sctp_inpcb *
1897 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1898 uint16_t lport, uint32_t vrf_id)
1899 {
1900 struct sctp_inpcb *inp;
1901 struct sctp_laddr *laddr;
1902 #ifdef INET
1903 struct sockaddr_in *sin;
1904 #endif
1905 #ifdef INET6
1906 struct sockaddr_in6 *sin6;
1907 struct sockaddr_in6 *intf_addr6;
1908 #endif
1909 #if defined(__Userspace__)
1910 struct sockaddr_conn *sconn;
1911 #endif
1912 #ifdef SCTP_MVRF
1913 int i;
1914 #endif
1915 int fnd;
1916
1917 #ifdef INET
1918 sin = NULL;
1919 #endif
1920 #ifdef INET6
1921 sin6 = NULL;
1922 #endif
1923 #if defined(__Userspace__)
1924 sconn = NULL;
1925 #endif
1926 switch (nam->sa_family) {
1927 #ifdef INET
1928 case AF_INET:
1929 sin = (struct sockaddr_in *)nam;
1930 break;
1931 #endif
1932 #ifdef INET6
1933 case AF_INET6:
1934 sin6 = (struct sockaddr_in6 *)nam;
1935 break;
1936 #endif
1937 #if defined(__Userspace__)
1938 case AF_CONN:
1939 sconn = (struct sockaddr_conn *)nam;
1940 break;
1941 #endif
1942 default:
1943 /* unsupported family */
1944 return (NULL);
1945 }
1946
1947 if (head == NULL)
1948 return (NULL);
1949
1950 LIST_FOREACH(inp, head, sctp_hash) {
1951 SCTP_INP_RLOCK(inp);
1952 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1953 SCTP_INP_RUNLOCK(inp);
1954 continue;
1955 }
1956 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1957 (inp->sctp_lport == lport)) {
1958 /* got it */
1959 switch (nam->sa_family) {
1960 #ifdef INET
1961 case AF_INET:
1962 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1963 SCTP_IPV6_V6ONLY(inp)) {
1964 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1965 SCTP_INP_RUNLOCK(inp);
1966 continue;
1967 }
1968 #if defined(__FreeBSD__)
1969 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1970 &sin->sin_addr) != 0) {
1971 SCTP_INP_RUNLOCK(inp);
1972 continue;
1973 }
1974 #endif
1975 break;
1976 #endif
1977 #ifdef INET6
1978 case AF_INET6:
1979 /* A V6 address and the endpoint is NOT bound V6 */
1980 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1981 SCTP_INP_RUNLOCK(inp);
1982 continue;
1983 }
1984 #if defined(__FreeBSD__)
1985 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1986 &sin6->sin6_addr) != 0) {
1987 SCTP_INP_RUNLOCK(inp);
1988 continue;
1989 }
1990 #endif
1991 break;
1992 #endif
1993 default:
1994 break;
1995 }
1996 /* does a VRF id match? */
1997 fnd = 0;
1998 #ifdef SCTP_MVRF
1999 for (i = 0; i < inp->num_vrfs; i++) {
2000 if (inp->m_vrf_ids[i] == vrf_id) {
2001 fnd = 1;
2002 break;
2003 }
2004 }
2005 #else
2006 if (inp->def_vrf_id == vrf_id)
2007 fnd = 1;
2008 #endif
2009
2010 SCTP_INP_RUNLOCK(inp);
2011 if (!fnd)
2012 continue;
2013 return (inp);
2014 }
2015 SCTP_INP_RUNLOCK(inp);
2016 }
2017 switch (nam->sa_family) {
2018 #ifdef INET
2019 case AF_INET:
2020 if (sin->sin_addr.s_addr == INADDR_ANY) {
2021 /* Can't hunt for one that has no address specified */
2022 return (NULL);
2023 }
2024 break;
2025 #endif
2026 #ifdef INET6
2027 case AF_INET6:
2028 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2029 /* Can't hunt for one that has no address specified */
2030 return (NULL);
2031 }
2032 break;
2033 #endif
2034 #if defined(__Userspace__)
2035 case AF_CONN:
2036 if (sconn->sconn_addr == NULL) {
2037 return (NULL);
2038 }
2039 break;
2040 #endif
2041 default:
2042 break;
2043 }
2044 /*
2045 * ok, not bound to all so see if we can find a EP bound to this
2046 * address.
2047 */
2048 LIST_FOREACH(inp, head, sctp_hash) {
2049 SCTP_INP_RLOCK(inp);
2050 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2051 SCTP_INP_RUNLOCK(inp);
2052 continue;
2053 }
2054 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
2055 SCTP_INP_RUNLOCK(inp);
2056 continue;
2057 }
2058 /*
2059 * Ok this could be a likely candidate, look at all of its
2060 * addresses
2061 */
2062 if (inp->sctp_lport != lport) {
2063 SCTP_INP_RUNLOCK(inp);
2064 continue;
2065 }
2066 /* does a VRF id match? */
2067 fnd = 0;
2068 #ifdef SCTP_MVRF
2069 for (i = 0; i < inp->num_vrfs; i++) {
2070 if (inp->m_vrf_ids[i] == vrf_id) {
2071 fnd = 1;
2072 break;
2073 }
2074 }
2075 #else
2076 if (inp->def_vrf_id == vrf_id)
2077 fnd = 1;
2078
2079 #endif
2080 if (!fnd) {
2081 SCTP_INP_RUNLOCK(inp);
2082 continue;
2083 }
2084 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2085 if (laddr->ifa == NULL) {
2086 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
2087 __FUNCTION__);
2088 continue;
2089 }
2090 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
2091 (void *)laddr->ifa);
2092 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2093 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
2094 continue;
2095 }
2096 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
2097 /* possible, see if it matches */
2098 switch (nam->sa_family) {
2099 #ifdef INET
2100 case AF_INET:
2101 #if defined(__APPLE__)
2102 if (sin == NULL) {
2103 /* TSNH */
2104 break;
2105 }
2106 #endif
2107 if (sin->sin_addr.s_addr ==
2108 laddr->ifa->address.sin.sin_addr.s_addr) {
2109 SCTP_INP_RUNLOCK(inp);
2110 return (inp);
2111 }
2112 break;
2113 #endif
2114 #ifdef INET6
2115 case AF_INET6:
2116 intf_addr6 = &laddr->ifa->address.sin6;
2117 if (SCTP6_ARE_ADDR_EQUAL(sin6,
2118 intf_addr6)) {
2119 SCTP_INP_RUNLOCK(inp);
2120 return (inp);
2121 }
2122 break;
2123 #endif
2124 #if defined(__Userspace__)
2125 case AF_CONN:
2126 if (sconn->sconn_addr == laddr->ifa->address.sconn.sconn_addr) {
2127 SCTP_INP_RUNLOCK(inp);
2128 return (inp);
2129 }
2130 break;
2131 #endif
2132 }
2133 }
2134 }
2135 SCTP_INP_RUNLOCK(inp);
2136 }
2137 return (NULL);
2138 }
2139
2140
2141 static struct sctp_inpcb *
2142 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2143 {
2144 struct sctppcbhead *head;
2145 struct sctp_inpcb *t_inp;
2146 #ifdef SCTP_MVRF
2147 int i;
2148 #endif
2149 int fnd;
2150
2151 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2152 SCTP_BASE_INFO(hashmark))];
2153 LIST_FOREACH(t_inp, head, sctp_hash) {
2154 if (t_inp->sctp_lport != lport) {
2155 continue;
2156 }
2157 /* is it in the VRF in question */
2158 fnd = 0;
2159 #ifdef SCTP_MVRF
2160 for (i = 0; i < inp->num_vrfs; i++) {
2161 if (t_inp->m_vrf_ids[i] == vrf_id) {
2162 fnd = 1;
2163 break;
2164 }
2165 }
2166 #else
2167 if (t_inp->def_vrf_id == vrf_id)
2168 fnd = 1;
2169 #endif
2170 if (!fnd)
2171 continue;
2172
2173 /* This one is in use. */
2174 /* check the v6/v4 binding issue */
2175 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2176 SCTP_IPV6_V6ONLY(t_inp)) {
2177 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2178 /* collision in V6 space */
2179 return (t_inp);
2180 } else {
2181 /* inp is BOUND_V4 no conflict */
2182 continue;
2183 }
2184 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2185 /* t_inp is bound v4 and v6, conflict always */
2186 return (t_inp);
2187 } else {
2188 /* t_inp is bound only V4 */
2189 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2190 SCTP_IPV6_V6ONLY(inp)) {
2191 /* no conflict */
2192 continue;
2193 }
2194 /* else fall through to conflict */
2195 }
2196 return (t_inp);
2197 }
2198 return (NULL);
2199 }
2200
2201
2202 int
2203 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
2204 {
2205 /* For 1-2-1 with port reuse */
2206 struct sctppcbhead *head;
2207 struct sctp_inpcb *tinp;
2208
2209 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
2210 /* only works with port reuse on */
2211 return (-1);
2212 }
2213 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
2214 return (0);
2215 }
2216 SCTP_INP_RUNLOCK(inp);
2217 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
2218 SCTP_BASE_INFO(hashmark))];
2219 /* Kick out all non-listeners to the TCP hash */
2220 LIST_FOREACH(tinp, head, sctp_hash) {
2221 if (tinp->sctp_lport != inp->sctp_lport) {
2222 continue;
2223 }
2224 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2225 continue;
2226 }
2227 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2228 continue;
2229 }
2230 if (tinp->sctp_socket->so_qlimit) {
2231 continue;
2232 }
2233 SCTP_INP_WLOCK(tinp);
2234 LIST_REMOVE(tinp, sctp_hash);
2235 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
2236 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
2237 LIST_INSERT_HEAD(head, tinp, sctp_hash);
2238 SCTP_INP_WUNLOCK(tinp);
2239 }
2240 SCTP_INP_WLOCK(inp);
2241 /* Pull from where he was */
2242 LIST_REMOVE(inp, sctp_hash);
2243 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
2244 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
2245 LIST_INSERT_HEAD(head, inp, sctp_hash);
2246 SCTP_INP_WUNLOCK(inp);
2247 SCTP_INP_RLOCK(inp);
2248 return (0);
2249 }
2250
2251
2252 struct sctp_inpcb *
2253 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
2254 uint32_t vrf_id)
2255 {
2256 /*
2257 * First we check the hash table to see if someone has this port
2258 * bound with just the port.
2259 */
2260 struct sctp_inpcb *inp;
2261 struct sctppcbhead *head;
2262 int lport;
2263 unsigned int i;
2264 #ifdef INET
2265 struct sockaddr_in *sin;
2266 #endif
2267 #ifdef INET6
2268 struct sockaddr_in6 *sin6;
2269 #endif
2270 #if defined(__Userspace__)
2271 struct sockaddr_conn *sconn;
2272 #endif
2273
2274 switch (nam->sa_family) {
2275 #ifdef INET
2276 case AF_INET:
2277 sin = (struct sockaddr_in *)nam;
2278 lport = sin->sin_port;
2279 break;
2280 #endif
2281 #ifdef INET6
2282 case AF_INET6:
2283 sin6 = (struct sockaddr_in6 *)nam;
2284 lport = sin6->sin6_port;
2285 break;
2286 #endif
2287 #if defined(__Userspace__)
2288 case AF_CONN:
2289 sconn = (struct sockaddr_conn *)nam;
2290 lport = sconn->sconn_port;
2291 break;
2292 #endif
2293 default:
2294 return (NULL);
2295 }
2296 /*
2297 * I could cheat here and just cast to one of the types but we will
2298 * do it right. It also provides the check against an Unsupported
2299 * type too.
2300 */
2301 /* Find the head of the ALLADDR chain */
2302 if (have_lock == 0) {
2303 SCTP_INP_INFO_RLOCK();
2304 }
2305 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2306 SCTP_BASE_INFO(hashmark))];
2307 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2308
2309 /*
2310 * If the TCP model exists it could be that the main listening
2311 * endpoint is gone but there still exists a connected socket for this
2312 * guy. If so we can return the first one that we find. This may NOT
2313 * be the correct one so the caller should be wary on the returned INP.
2314 * Currently the only caller that sets find_tcp_pool is in bindx where
2315 * we are verifying that a user CAN bind the address. He either
2316 * has bound it already, or someone else has, or its open to bind,
2317 * so this is good enough.
2318 */
2319 if (inp == NULL && find_tcp_pool) {
2320 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
2321 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
2322 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2323 if (inp) {
2324 break;
2325 }
2326 }
2327 }
2328 if (inp) {
2329 SCTP_INP_INCR_REF(inp);
2330 }
2331 if (have_lock == 0) {
2332 SCTP_INP_INFO_RUNLOCK();
2333 }
2334 return (inp);
2335 }
2336
2337
2338 /*
2339 * Find an association for an endpoint with the pointer to whom you want to
2340 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2341 * need to change the *to to some other struct like a mbuf...
2342 */
2343 struct sctp_tcb *
2344 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2345 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2346 uint32_t vrf_id)
2347 {
2348 struct sctp_inpcb *inp = NULL;
2349 struct sctp_tcb *stcb;
2350
2351 SCTP_INP_INFO_RLOCK();
2352 if (find_tcp_pool) {
2353 if (inp_p != NULL) {
2354 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2355 vrf_id);
2356 } else {
2357 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2358 vrf_id);
2359 }
2360 if (stcb != NULL) {
2361 SCTP_INP_INFO_RUNLOCK();
2362 return (stcb);
2363 }
2364 }
2365 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2366 if (inp_p != NULL) {
2367 *inp_p = inp;
2368 }
2369 SCTP_INP_INFO_RUNLOCK();
2370 if (inp == NULL) {
2371 return (NULL);
2372 }
2373 /*
2374 * ok, we have an endpoint, now lets find the assoc for it (if any)
2375 * we now place the source address or from in the to of the find
2376 * endpoint call. Since in reality this chain is used from the
2377 * inbound packet side.
2378 */
2379 if (inp_p != NULL) {
2380 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2381 NULL);
2382 } else {
2383 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2384 NULL);
2385 }
2386 return (stcb);
2387 }
2388
2389
2390 /*
2391 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2392 * find all addresses that the sender has specified in any address list. Each
2393 * address will be used to lookup the TCB and see if one exits.
2394 */
2395 static struct sctp_tcb *
2396 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2397 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2398 struct sockaddr *dst)
2399 {
2400 struct sctp_paramhdr *phdr, parm_buf;
2401 #if defined(INET) || defined(INET6)
2402 struct sctp_tcb *stcb;
2403 uint16_t ptype;
2404 #endif
2405 uint16_t plen;
2406 #ifdef INET
2407 struct sockaddr_in sin4;
2408 #endif
2409 #ifdef INET6
2410 struct sockaddr_in6 sin6;
2411 #endif
2412
2413 #ifdef INET
2414 memset(&sin4, 0, sizeof(sin4));
2415 #ifdef HAVE_SIN_LEN
2416 sin4.sin_len = sizeof(sin4);
2417 #endif
2418 sin4.sin_family = AF_INET;
2419 sin4.sin_port = sh->src_port;
2420 #endif
2421 #ifdef INET6
2422 memset(&sin6, 0, sizeof(sin6));
2423 #ifdef HAVE_SIN6_LEN
2424 sin6.sin6_len = sizeof(sin6);
2425 #endif
2426 sin6.sin6_family = AF_INET6;
2427 sin6.sin6_port = sh->src_port;
2428 #endif
2429
2430 offset += sizeof(struct sctp_init_chunk);
2431
2432 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2433 while (phdr != NULL) {
2434 /* now we must see if we want the parameter */
2435 #if defined(INET) || defined(INET6)
2436 ptype = ntohs(phdr->param_type);
2437 #endif
2438 plen = ntohs(phdr->param_length);
2439 if (plen == 0) {
2440 break;
2441 }
2442 #ifdef INET
2443 if (ptype == SCTP_IPV4_ADDRESS &&
2444 plen == sizeof(struct sctp_ipv4addr_param)) {
2445 /* Get the rest of the address */
2446 struct sctp_ipv4addr_param ip4_parm, *p4;
2447
2448 phdr = sctp_get_next_param(m, offset,
2449 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2450 if (phdr == NULL) {
2451 return (NULL);
2452 }
2453 p4 = (struct sctp_ipv4addr_param *)phdr;
2454 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2455 /* look it up */
2456 stcb = sctp_findassociation_ep_addr(inp_p,
2457 (struct sockaddr *)&sin4, netp, dst, NULL);
2458 if (stcb != NULL) {
2459 return (stcb);
2460 }
2461 }
2462 #endif
2463 #ifdef INET6
2464 if (ptype == SCTP_IPV6_ADDRESS &&
2465 plen == sizeof(struct sctp_ipv6addr_param)) {
2466 /* Get the rest of the address */
2467 struct sctp_ipv6addr_param ip6_parm, *p6;
2468
2469 phdr = sctp_get_next_param(m, offset,
2470 (struct sctp_paramhdr *)&ip6_parm, min(plen,sizeof(ip6_parm)));
2471 if (phdr == NULL) {
2472 return (NULL);
2473 }
2474 p6 = (struct sctp_ipv6addr_param *)phdr;
2475 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2476 /* look it up */
2477 stcb = sctp_findassociation_ep_addr(inp_p,
2478 (struct sockaddr *)&sin6, netp, dst, NULL);
2479 if (stcb != NULL) {
2480 return (stcb);
2481 }
2482 }
2483 #endif
2484 offset += SCTP_SIZE32(plen);
2485 phdr = sctp_get_next_param(m, offset, &parm_buf,
2486 sizeof(parm_buf));
2487 }
2488 return (NULL);
2489 }
2490
2491 static struct sctp_tcb *
2492 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2493 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2494 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2495 {
2496 /*
2497 * Use my vtag to hash. If we find it we then verify the source addr
2498 * is in the assoc. If all goes well we save a bit on rec of a
2499 * packet.
2500 */
2501 struct sctpasochead *head;
2502 struct sctp_nets *net;
2503 struct sctp_tcb *stcb;
2504 #ifdef SCTP_MVRF
2505 unsigned int i;
2506 #endif
2507
2508 SCTP_INP_INFO_RLOCK();
2509 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2510 SCTP_BASE_INFO(hashasocmark))];
2511 if (head == NULL) {
2512 /* invalid vtag */
2513 SCTP_INP_INFO_RUNLOCK();
2514 return (NULL);
2515 }
2516 LIST_FOREACH(stcb, head, sctp_asocs) {
2517 SCTP_INP_RLOCK(stcb->sctp_ep);
2518 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2519 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2520 continue;
2521 }
2522 #ifdef SCTP_MVRF
2523 for (i = 0; i < stcb->sctp_ep->num_vrfs; i++) {
2524 if (stcb->sctp_ep->m_vrf_ids[i] == vrf_id) {
2525 break;
2526 }
2527 }
2528 if (i == stcb->sctp_ep->num_vrfs) {
2529 SCTP_INP_RUNLOCK(inp);
2530 continue;
2531 }
2532 #else
2533 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2534 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2535 continue;
2536 }
2537 #endif
2538 SCTP_TCB_LOCK(stcb);
2539 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2540 if (stcb->asoc.my_vtag == vtag) {
2541 /* candidate */
2542 if (stcb->rport != rport) {
2543 SCTP_TCB_UNLOCK(stcb);
2544 continue;
2545 }
2546 if (stcb->sctp_ep->sctp_lport != lport) {
2547 SCTP_TCB_UNLOCK(stcb);
2548 continue;
2549 }
2550 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2551 SCTP_TCB_UNLOCK(stcb);
2552 continue;
2553 }
2554 /* RRS:Need toaddr check here */
2555 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2556 /* Endpoint does not own this address */
2557 SCTP_TCB_UNLOCK(stcb);
2558 continue;
2559 }
2560 if (remote_tag) {
2561 /* If we have both vtags that's all we match on */
2562 if (stcb->asoc.peer_vtag == remote_tag) {
2563 /* If both tags match we consider it conclusive
2564 * and check NO source/destination addresses
2565 */
2566 goto conclusive;
2567 }
2568 }
2569 if (skip_src_check) {
2570 conclusive:
2571 if (from) {
2572 *netp = sctp_findnet(stcb, from);
2573 } else {
2574 *netp = NULL; /* unknown */
2575 }
2576 if (inp_p)
2577 *inp_p = stcb->sctp_ep;
2578 SCTP_INP_INFO_RUNLOCK();
2579 return (stcb);
2580 }
2581 net = sctp_findnet(stcb, from);
2582 if (net) {
2583 /* yep its him. */
2584 *netp = net;
2585 SCTP_STAT_INCR(sctps_vtagexpress);
2586 *inp_p = stcb->sctp_ep;
2587 SCTP_INP_INFO_RUNLOCK();
2588 return (stcb);
2589 } else {
2590 /*
2591 * not him, this should only happen in rare
2592 * cases so I peg it.
2593 */
2594 SCTP_STAT_INCR(sctps_vtagbogus);
2595 }
2596 }
2597 SCTP_TCB_UNLOCK(stcb);
2598 }
2599 SCTP_INP_INFO_RUNLOCK();
2600 return (NULL);
2601 }
2602
2603
2604 /*
2605 * Find an association with the pointer to the inbound IP packet. This can be
2606 * a IPv4 or IPv6 packet.
2607 */
2608 struct sctp_tcb *
2609 sctp_findassociation_addr(struct mbuf *m, int offset,
2610 struct sockaddr *src, struct sockaddr *dst,
2611 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2612 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2613 {
2614 int find_tcp_pool;
2615 struct sctp_tcb *stcb;
2616 struct sctp_inpcb *inp;
2617
2618 if (sh->v_tag) {
2619 /* we only go down this path if vtag is non-zero */
2620 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2621 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2622 if (stcb) {
2623 return (stcb);
2624 }
2625 }
2626
2627 find_tcp_pool = 0;
2628 if ((ch->chunk_type != SCTP_INITIATION) &&
2629 (ch->chunk_type != SCTP_INITIATION_ACK) &&
2630 (ch->chunk_type != SCTP_COOKIE_ACK) &&
2631 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2632 /* Other chunk types go to the tcp pool. */
2633 find_tcp_pool = 1;
2634 }
2635 if (inp_p) {
2636 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2637 find_tcp_pool, vrf_id);
2638 inp = *inp_p;
2639 } else {
2640 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2641 find_tcp_pool, vrf_id);
2642 }
2643 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2644 if (stcb == NULL && inp) {
2645 /* Found a EP but not this address */
2646 if ((ch->chunk_type == SCTP_INITIATION) ||
2647 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2648 /*-
2649 * special hook, we do NOT return linp or an
2650 * association that is linked to an existing
2651 * association that is under the TCP pool (i.e. no
2652 * listener exists). The endpoint finding routine
2653 * will always find a listener before examining the
2654 * TCP pool.
2655 */
2656 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2657 if (inp_p) {
2658 *inp_p = NULL;
2659 }
2660 return (NULL);
2661 }
2662 stcb = sctp_findassociation_special_addr(m,
2663 offset, sh, &inp, netp, dst);
2664 if (inp_p != NULL) {
2665 *inp_p = inp;
2666 }
2667 }
2668 }
2669 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2670 return (stcb);
2671 }
2672
2673 /*
2674 * lookup an association by an ASCONF lookup address.
2675 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2676 */
2677 struct sctp_tcb *
2678 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2679 struct sockaddr *dst, struct sctphdr *sh,
2680 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2681 {
2682 struct sctp_tcb *stcb;
2683 union sctp_sockstore remote_store;
2684 struct sctp_paramhdr parm_buf, *phdr;
2685 int ptype;
2686 int zero_address = 0;
2687 #ifdef INET
2688 struct sockaddr_in *sin;
2689 #endif
2690 #ifdef INET6
2691 struct sockaddr_in6 *sin6;
2692 #endif
2693
2694 memset(&remote_store, 0, sizeof(remote_store));
2695 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2696 &parm_buf, sizeof(struct sctp_paramhdr));
2697 if (phdr == NULL) {
2698 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2699 __FUNCTION__);
2700 return NULL;
2701 }
2702 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2703 /* get the correlation address */
2704 switch (ptype) {
2705 #ifdef INET6
2706 case SCTP_IPV6_ADDRESS:
2707 {
2708 /* ipv6 address param */
2709 struct sctp_ipv6addr_param *p6, p6_buf;
2710
2711 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2712 return NULL;
2713 }
2714 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2715 offset + sizeof(struct sctp_asconf_chunk),
2716 &p6_buf.ph, sizeof(*p6));
2717 if (p6 == NULL) {
2718 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2719 __FUNCTION__);
2720 return (NULL);
2721 }
2722 sin6 = &remote_store.sin6;
2723 sin6->sin6_family = AF_INET6;
2724 #ifdef HAVE_SIN6_LEN
2725 sin6->sin6_len = sizeof(*sin6);
2726 #endif
2727 sin6->sin6_port = sh->src_port;
2728 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2729 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2730 zero_address = 1;
2731 break;
2732 }
2733 #endif
2734 #ifdef INET
2735 case SCTP_IPV4_ADDRESS:
2736 {
2737 /* ipv4 address param */
2738 struct sctp_ipv4addr_param *p4, p4_buf;
2739
2740 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2741 return NULL;
2742 }
2743 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2744 offset + sizeof(struct sctp_asconf_chunk),
2745 &p4_buf.ph, sizeof(*p4));
2746 if (p4 == NULL) {
2747 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2748 __FUNCTION__);
2749 return (NULL);
2750 }
2751 sin = &remote_store.sin;
2752 sin->sin_family = AF_INET;
2753 #ifdef HAVE_SIN_LEN
2754 sin->sin_len = sizeof(*sin);
2755 #endif
2756 sin->sin_port = sh->src_port;
2757 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2758 if (sin->sin_addr.s_addr == INADDR_ANY)
2759 zero_address = 1;
2760 break;
2761 }
2762 #endif
2763 default:
2764 /* invalid address param type */
2765 return NULL;
2766 }
2767
2768 if (zero_address) {
2769 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2770 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2771 if (stcb != NULL) {
2772 SCTP_INP_DECR_REF(*inp_p);
2773 }
2774 } else {
2775 stcb = sctp_findassociation_ep_addr(inp_p,
2776 &remote_store.sa, netp,
2777 dst, NULL);
2778 }
2779 return (stcb);
2780 }
2781
2782
2783 /*
2784 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2785 * addresses. This way if we don't get a bind we by default pick a ephemeral
2786 * port with all addresses bound.
2787 */
2788 int
2789 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2790 {
2791 /*
2792 * we get called when a new endpoint starts up. We need to allocate
2793 * the sctp_inpcb structure from the zone and init it. Mark it as
2794 * unbound and find a port that we can use as an ephemeral with
2795 * INADDR_ANY. If the user binds later no problem we can then add in
2796 * the specific addresses. And setup the default parameters for the
2797 * EP.
2798 */
2799 int i, error;
2800 struct sctp_inpcb *inp;
2801 struct sctp_pcb *m;
2802 struct timeval time;
2803 sctp_sharedkey_t *null_key;
2804
2805 error = 0;
2806
2807 SCTP_INP_INFO_WLOCK();
2808 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2809 if (inp == NULL) {
2810 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2811 SCTP_INP_INFO_WUNLOCK();
2812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2813 return (ENOBUFS);
2814 }
2815 /* zap it */
2816 bzero(inp, sizeof(*inp));
2817
2818 /* bump generations */
2819 #if defined(__APPLE__)
2820 inp->ip_inp.inp.inp_state = INPCB_STATE_INUSE;
2821 #endif
2822 /* setup socket pointers */
2823 inp->sctp_socket = so;
2824 inp->ip_inp.inp.inp_socket = so;
2825 #if defined(__FreeBSD__)
2826 inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2827 #endif
2828 #ifdef INET6
2829 #if !defined(__Userspace__) && !defined(__Windows__)
2830 if (INP_SOCKAF(so) == AF_INET6) {
2831 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2832 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2833 }
2834 if (MODULE_GLOBAL(ip6_v6only)) {
2835 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2836 }
2837 }
2838 #endif
2839 #endif
2840 inp->sctp_associd_counter = 1;
2841 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2842 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2843 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2844 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2845 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2846 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2847 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2848 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2849 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2850 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2851 #if defined(__Userspace__)
2852 inp->ulp_info = NULL;
2853 inp->recv_callback = NULL;
2854 inp->send_callback = NULL;
2855 inp->send_sb_threshold = 0;
2856 #endif
2857 /* init the small hash table we use to track asocid <-> tcb */
2858 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2859 if (inp->sctp_asocidhash == NULL) {
2860 #if defined(__FreeBSD__)
2861 crfree(inp->ip_inp.inp.inp_cred);
2862 #endif
2863 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2864 SCTP_INP_INFO_WUNLOCK();
2865 return (ENOBUFS);
2866 }
2867 #ifdef IPSEC
2868 #if !(defined(__APPLE__))
2869 {
2870 struct inpcbpolicy *pcb_sp = NULL;
2871
2872 error = ipsec_init_policy(so, &pcb_sp);
2873 /* Arrange to share the policy */
2874 inp->ip_inp.inp.inp_sp = pcb_sp;
2875 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2876 }
2877 #else
2878 /* not sure what to do for openbsd here */
2879 error = 0;
2880 #endif
2881 if (error != 0) {
2882 #if defined(__FreeBSD__)
2883 crfree(inp->ip_inp.inp.inp_cred);
2884 #endif
2885 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2886 SCTP_INP_INFO_WUNLOCK();
2887 return error;
2888 }
2889 #endif /* IPSEC */
2890 SCTP_INCR_EP_COUNT();
2891 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2892 SCTP_INP_INFO_WUNLOCK();
2893
2894 so->so_pcb = (caddr_t)inp;
2895
2896 #if defined(__FreeBSD__) && __FreeBSD_version < 803000
2897 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2898 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2899 #else
2900 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2901 #endif
2902 /* UDP style socket */
2903 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2904 SCTP_PCB_FLAGS_UNBOUND);
2905 /* Be sure it is NON-BLOCKING IO for UDP */
2906 /* SCTP_SET_SO_NBIO(so); */
2907 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2908 /* TCP style socket */
2909 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2910 SCTP_PCB_FLAGS_UNBOUND);
2911 /* Be sure we have blocking IO by default */
2912 SCTP_CLEAR_SO_NBIO(so);
2913 #if defined(__Panda__)
2914 } else if (SCTP_SO_TYPE(so) == SOCK_FASTSEQPACKET) {
2915 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2916 SCTP_PCB_FLAGS_UNBOUND);
2917 sctp_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE);
2918 } else if (SCTP_SO_TYPE(so) == SOCK_FASTSTREAM) {
2919 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2920 SCTP_PCB_FLAGS_UNBOUND);
2921 sctp_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE);
2922 #endif
2923 } else {
2924 /*
2925 * unsupported socket type (RAW, etc)- in case we missed it
2926 * in protosw
2927 */
2928 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2929 so->so_pcb = NULL;
2930 #if defined(__FreeBSD__)
2931 crfree(inp->ip_inp.inp.inp_cred);
2932 #endif
2933 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2934 return (EOPNOTSUPP);
2935 }
2936 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2937 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2938 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2939 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2940 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2941 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2942 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2943 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2944 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2945 }
2946 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2947 &inp->sctp_hashmark);
2948 if (inp->sctp_tcbhash == NULL) {
2949 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2950 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2951 so->so_pcb = NULL;
2952 #if defined(__FreeBSD__)
2953 crfree(inp->ip_inp.inp.inp_cred);
2954 #endif
2955 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2956 return (ENOBUFS);
2957 }
2958 #ifdef SCTP_MVRF
2959 inp->vrf_size = SCTP_DEFAULT_VRF_SIZE;
2960 SCTP_MALLOC(inp->m_vrf_ids, uint32_t *,
2961 (sizeof(uint32_t) * inp->vrf_size), SCTP_M_MVRF);
2962 if (inp->m_vrf_ids == NULL) {
2963 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2964 so->so_pcb = NULL;
2965 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2966 #if defined(__FreeBSD__)
2967 crfree(inp->ip_inp.inp.inp_cred);
2968 #endif
2969 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2970 return (ENOBUFS);
2971 }
2972 inp->m_vrf_ids[0] = vrf_id;
2973 inp->num_vrfs = 1;
2974 #endif
2975 inp->def_vrf_id = vrf_id;
2976
2977 #if defined(__APPLE__)
2978 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
2979 inp->ip_inp.inp.inpcb_mtx = lck_mtx_alloc_init(SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2980 if (inp->ip_inp.inp.inpcb_mtx == NULL) {
2981 SCTP_PRINTF("in_pcballoc: can't alloc mutex! so=%p\n", (void *)so);
2982 #ifdef SCTP_MVRF
2983 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
2984 #endif
2985 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2986 so->so_pcb = NULL;
2987 #if defined(__FreeBSD__)
2988 crfree(inp->ip_inp.inp.inp_cred);
2989 #endif
2990 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2991 SCTP_UNLOCK_EXC(SCTP_BASE_INFO(sctbinfo).ipi_lock);
2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
2993 return (ENOMEM);
2994 }
2995 #elif defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2996 lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2997 #else
2998 lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).ipi_lock_grp, SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
2999 #endif
3000 #endif
3001 SCTP_INP_INFO_WLOCK();
3002 SCTP_INP_LOCK_INIT(inp);
3003 #if defined(__FreeBSD__)
3004 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
3005 #endif
3006 SCTP_INP_READ_INIT(inp);
3007 SCTP_ASOC_CREATE_LOCK_INIT(inp);
3008 /* lock the new ep */
3009 SCTP_INP_WLOCK(inp);
3010
3011 /* add it to the info area */
3012 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
3013 #if defined(__APPLE__)
3014 inp->ip_inp.inp.inp_pcbinfo = &SCTP_BASE_INFO(sctbinfo);
3015 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
3016 LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).listhead, &inp->ip_inp.inp, inp_list);
3017 #else
3018 LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).ipi_listhead, &inp->ip_inp.inp, inp_list);
3019 #endif
3020 #endif
3021 SCTP_INP_INFO_WUNLOCK();
3022
3023 TAILQ_INIT(&inp->read_queue);
3024 LIST_INIT(&inp->sctp_addr_list);
3025
3026 LIST_INIT(&inp->sctp_asoc_list);
3027
3028 #ifdef SCTP_TRACK_FREED_ASOCS
3029 /* TEMP CODE */
3030 LIST_INIT(&inp->sctp_asoc_free_list);
3031 #endif
3032 /* Init the timer structure for signature change */
3033 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
3034 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
3035
3036 /* now init the actual endpoint default data */
3037 m = &inp->sctp_ep;
3038
3039 /* setup the base timeout information */
3040 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
3041 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
3042 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
3043 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
3044 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
3045 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
3046 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
3047 /* all max/min max are in ms */
3048 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
3049 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
3050 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
3051 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
3052 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
3053 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
3054 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
3055 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
3056 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
3057 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
3058 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
3059 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
3060 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
3061
3062 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
3063 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
3064 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
3065 /* number of streams to pre-open on a association */
3066 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
3067
3068 /* Add adaptation cookie */
3069 m->adaptation_layer_indicator = 0;
3070 m->adaptation_layer_indicator_provided = 0;
3071
3072 /* seed random number generator */
3073 m->random_counter = 1;
3074 m->store_at = SCTP_SIGNATURE_SIZE;
3075 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
3076 sctp_fill_random_store(m);
3077
3078 /* Minimum cookie size */
3079 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
3080 sizeof(struct sctp_state_cookie);
3081 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
3082
3083 /* Setup the initial secret */
3084 (void)SCTP_GETTIME_TIMEVAL(&time);
3085 m->time_of_secret_change = time.tv_sec;
3086
3087 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
3088 m->secret_key[0][i] = sctp_select_initial_TSN(m);
3089 }
3090 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
3091
3092 /* How long is a cookie good for ? */
3093 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
3094 /*
3095 * Initialize authentication parameters
3096 */
3097 m->local_hmacs = sctp_default_supported_hmaclist();
3098 m->local_auth_chunks = sctp_alloc_chunklist();
3099 if (inp->asconf_supported) {
3100 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
3101 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
3102 }
3103 m->default_dscp = 0;
3104 #ifdef INET6
3105 m->default_flowlabel = 0;
3106 #endif
3107 m->port = 0; /* encapsulation disabled by default */
3108 LIST_INIT(&m->shared_keys);
3109 /* add default NULL key as key id 0 */
3110 null_key = sctp_alloc_sharedkey();
3111 sctp_insert_sharedkey(&m->shared_keys, null_key);
3112 SCTP_INP_WUNLOCK(inp);
3113 #ifdef SCTP_LOG_CLOSING
3114 sctp_log_closing(inp, NULL, 12);
3115 #endif
3116 return (error);
3117 }
3118
3119
3120 void
3121 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
3122 struct sctp_tcb *stcb)
3123 {
3124 struct sctp_nets *net;
3125 uint16_t lport, rport;
3126 struct sctppcbhead *head;
3127 struct sctp_laddr *laddr, *oladdr;
3128
3129 atomic_add_int(&stcb->asoc.refcnt, 1);
3130 SCTP_TCB_UNLOCK(stcb);
3131 SCTP_INP_INFO_WLOCK();
3132 SCTP_INP_WLOCK(old_inp);
3133 SCTP_INP_WLOCK(new_inp);
3134 SCTP_TCB_LOCK(stcb);
3135 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3136
3137 new_inp->sctp_ep.time_of_secret_change =
3138 old_inp->sctp_ep.time_of_secret_change;
3139 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
3140 sizeof(old_inp->sctp_ep.secret_key));
3141 new_inp->sctp_ep.current_secret_number =
3142 old_inp->sctp_ep.current_secret_number;
3143 new_inp->sctp_ep.last_secret_number =
3144 old_inp->sctp_ep.last_secret_number;
3145 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
3146
3147 /* make it so new data pours into the new socket */
3148 stcb->sctp_socket = new_inp->sctp_socket;
3149 stcb->sctp_ep = new_inp;
3150
3151 /* Copy the port across */
3152 lport = new_inp->sctp_lport = old_inp->sctp_lport;
3153 rport = stcb->rport;
3154 /* Pull the tcb from the old association */
3155 LIST_REMOVE(stcb, sctp_tcbhash);
3156 LIST_REMOVE(stcb, sctp_tcblist);
3157 if (stcb->asoc.in_asocid_hash) {
3158 LIST_REMOVE(stcb, sctp_tcbasocidhash);
3159 }
3160 /* Now insert the new_inp into the TCP connected hash */
3161 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
3162
3163 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
3164 /* Its safe to access */
3165 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3166
3167 /* Now move the tcb into the endpoint list */
3168 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
3169 /*
3170 * Question, do we even need to worry about the ep-hash since we
3171 * only have one connection? Probably not :> so lets get rid of it
3172 * and not suck up any kernel memory in that.
3173 */
3174 if (stcb->asoc.in_asocid_hash) {
3175 struct sctpasochead *lhd;
3176 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
3177 new_inp->hashasocidmark)];
3178 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
3179 }
3180 /* Ok. Let's restart timer. */
3181 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3182 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
3183 stcb, net);
3184 }
3185
3186 SCTP_INP_INFO_WUNLOCK();
3187 if (new_inp->sctp_tcbhash != NULL) {
3188 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
3189 new_inp->sctp_tcbhash = NULL;
3190 }
3191 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
3192 /* Subset bound, so copy in the laddr list from the old_inp */
3193 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
3194 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3195 if (laddr == NULL) {
3196 /*
3197 * Gak, what can we do? This assoc is really
3198 * HOSED. We probably should send an abort
3199 * here.
3200 */
3201 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
3202 continue;
3203 }
3204 SCTP_INCR_LADDR_COUNT();
3205 bzero(laddr, sizeof(*laddr));
3206 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
3207 laddr->ifa = oladdr->ifa;
3208 atomic_add_int(&laddr->ifa->refcount, 1);
3209 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
3210 sctp_nxt_addr);
3211 new_inp->laddr_count++;
3212 if (oladdr == stcb->asoc.last_used_address) {
3213 stcb->asoc.last_used_address = laddr;
3214 }
3215 }
3216 }
3217 /* Now any running timers need to be adjusted
3218 * since we really don't care if they are running
3219 * or not just blast in the new_inp into all of
3220 * them.
3221 */
3222
3223 stcb->asoc.dack_timer.ep = (void *)new_inp;
3224 stcb->asoc.asconf_timer.ep = (void *)new_inp;
3225 stcb->asoc.strreset_timer.ep = (void *)new_inp;
3226 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
3227 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
3228 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
3229 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
3230 /* now what about the nets? */
3231 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3232 net->pmtu_timer.ep = (void *)new_inp;
3233 net->hb_timer.ep = (void *)new_inp;
3234 net->rxt_timer.ep = (void *)new_inp;
3235 }
3236 SCTP_INP_WUNLOCK(new_inp);
3237 SCTP_INP_WUNLOCK(old_inp);
3238 }
3239
3240
3241 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__))
3242 /*
3243 * Don't know why, but without this there is an unknown reference when
3244 * compiling NetBSD... hmm
3245 */
3246 extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *sin6);
3247 #endif
3248
3249
3250 /* sctp_ifap is used to bypass normal local address validation checks */
3251 int
3252 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3253 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3254 struct sctp_ifa *sctp_ifap, struct thread *p)
3255 #elif defined(__Windows__)
3256 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3257 struct sctp_ifa *sctp_ifap, PKTHREAD p)
3258 #else
3259 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3260 struct sctp_ifa *sctp_ifap, struct proc *p)
3261 #endif
3262 {
3263 /* bind a ep to a socket address */
3264 struct sctppcbhead *head;
3265 struct sctp_inpcb *inp, *inp_tmp;
3266 #if defined(INET) || (defined(INET6) && defined(__APPLE__)) || defined(__FreeBSD__) || defined(__APPLE__)
3267 struct inpcb *ip_inp;
3268 #endif
3269 int port_reuse_active = 0;
3270 int bindall;
3271 #ifdef SCTP_MVRF
3272 int i;
3273 #endif
3274 uint16_t lport;
3275 int error;
3276 uint32_t vrf_id;
3277
3278 lport = 0;
3279 bindall = 1;
3280 inp = (struct sctp_inpcb *)so->so_pcb;
3281 #if defined(INET) || (defined(INET6) && defined(__APPLE__)) || defined(__FreeBSD__) || defined(__APPLE__)
3282 ip_inp = (struct inpcb *)so->so_pcb;
3283 #endif
3284 #ifdef SCTP_DEBUG
3285 if (addr) {
3286 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
3287 ntohs(((struct sockaddr_in *)addr)->sin_port));
3288 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
3289 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
3290 }
3291 #endif
3292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3293 /* already did a bind, subsequent binds NOT allowed ! */
3294 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3295 return (EINVAL);
3296 }
3297 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3298 #ifdef INVARIANTS
3299 if (p == NULL)
3300 panic("null proc/thread");
3301 #endif
3302 #endif
3303 if (addr != NULL) {
3304 switch (addr->sa_family) {
3305 #ifdef INET
3306 case AF_INET:
3307 {
3308 struct sockaddr_in *sin;
3309
3310 /* IPV6_V6ONLY socket? */
3311 if (SCTP_IPV6_V6ONLY(ip_inp)) {
3312 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3313 return (EINVAL);
3314 }
3315 #ifdef HAVE_SA_LEN
3316 if (addr->sa_len != sizeof(*sin)) {
3317 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3318 return (EINVAL);
3319 }
3320 #endif
3321
3322 sin = (struct sockaddr_in *)addr;
3323 lport = sin->sin_port;
3324 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
3325 /*
3326 * For LOOPBACK the prison_local_ip4() call will transmute the ip address
3327 * to the proper value.
3328 */
3329 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
3330 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3331 return (error);
3332 }
3333 #endif
3334 if (sin->sin_addr.s_addr != INADDR_ANY) {
3335 bindall = 0;
3336 }
3337 break;
3338 }
3339 #endif
3340 #ifdef INET6
3341 case AF_INET6:
3342 {
3343 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
3344 struct sockaddr_in6 *sin6;
3345
3346 sin6 = (struct sockaddr_in6 *)addr;
3347
3348 #ifdef HAVE_SA_LEN
3349 if (addr->sa_len != sizeof(*sin6)) {
3350 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3351 return (EINVAL);
3352 }
3353 #endif
3354 lport = sin6->sin6_port;
3355 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
3356 /*
3357 * For LOOPBACK the prison_local_ip6() call will transmute the ipv6 address
3358 * to the proper value.
3359 */
3360 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
3361 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
3362 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3363 return (error);
3364 }
3365 #endif
3366 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3367 bindall = 0;
3368 #ifdef SCTP_EMBEDDED_V6_SCOPE
3369 /* KAME hack: embed scopeid */
3370 #if defined(SCTP_KAME)
3371 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3372 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3373 return (EINVAL);
3374 }
3375 #elif defined(__APPLE__)
3376 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
3377 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL) != 0) {
3378 #else
3379 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL, NULL) != 0) {
3380 #endif
3381 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3382 return (EINVAL);
3383 }
3384 #elif defined(__FreeBSD__)
3385 error = scope6_check_id(sin6, MODULE_GLOBAL(ip6_use_defzone));
3386 if (error != 0) {
3387 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3388 return (error);
3389 }
3390 #else
3391 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
3392 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3393 return (EINVAL);
3394 }
3395 #endif
3396 #endif /* SCTP_EMBEDDED_V6_SCOPE */
3397 }
3398 #ifndef SCOPEDROUTING
3399 /* this must be cleared for ifa_ifwithaddr() */
3400 sin6->sin6_scope_id = 0;
3401 #endif /* SCOPEDROUTING */
3402 break;
3403 }
3404 #endif
3405 #if defined(__Userspace__)
3406 case AF_CONN:
3407 {
3408 struct sockaddr_conn *sconn;
3409
3410 #ifdef HAVE_SA_LEN
3411 if (addr->sa_len != sizeof(struct sockaddr_conn)) {
3412 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3413 return (EINVAL);
3414 }
3415 #endif
3416 sconn = (struct sockaddr_conn *)addr;
3417 lport = sconn->sconn_port;
3418 if (sconn->sconn_addr != NULL) {
3419 bindall = 0;
3420 }
3421 break;
3422 }
3423 #endif
3424 default:
3425 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
3426 return (EAFNOSUPPORT);
3427 }
3428 }
3429 SCTP_INP_INFO_WLOCK();
3430 SCTP_INP_WLOCK(inp);
3431 /* Setup a vrf_id to be the default for the non-bind-all case. */
3432 vrf_id = inp->def_vrf_id;
3433
3434 /* increase our count due to the unlock we do */
3435 SCTP_INP_INCR_REF(inp);
3436 if (lport) {
3437 /*
3438 * Did the caller specify a port? if so we must see if an ep
3439 * already has this one bound.
3440 */
3441 /* got to be root to get at low ports */
3442 #if !defined(__Windows__)
3443 if (ntohs(lport) < IPPORT_RESERVED) {
3444 if (p && (error =
3445 #ifdef __FreeBSD__
3446 #if __FreeBSD_version > 602000
3447 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3448 #elif __FreeBSD_version >= 500000
3449 suser_cred(p->td_ucred, 0)
3450 #else
3451 suser(p)
3452 #endif
3453 #elif defined(__APPLE__)
3454 suser(p->p_ucred, &p->p_acflag)
3455 #elif defined(__Userspace__) /* must be true to use raw socket */
3456 1
3457 #else
3458 suser(p, 0)
3459 #endif
3460 )) {
3461 SCTP_INP_DECR_REF(inp);
3462 SCTP_INP_WUNLOCK(inp);
3463 SCTP_INP_INFO_WUNLOCK();
3464 return (error);
3465 }
3466 #if defined(__Panda__)
3467 if (!SCTP_IS_PRIVILEDGED(so)) {
3468 SCTP_INP_DECR_REF(inp);
3469 SCTP_INP_WUNLOCK(inp);
3470 SCTP_INP_INFO_WUNLOCK();
3471 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EACCES);
3472 return (EACCES);
3473 }
3474 #endif
3475 }
3476 #endif /* __Windows__ */
3477 SCTP_INP_WUNLOCK(inp);
3478 if (bindall) {
3479 #ifdef SCTP_MVRF
3480 for (i = 0; i < inp->num_vrfs; i++) {
3481 vrf_id = inp->m_vrf_ids[i];
3482 #else
3483 vrf_id = inp->def_vrf_id;
3484 #endif
3485 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3486 if (inp_tmp != NULL) {
3487 /*
3488 * lock guy returned and lower count
3489 * note that we are not bound so
3490 * inp_tmp should NEVER be inp. And
3491 * it is this inp (inp_tmp) that gets
3492 * the reference bump, so we must
3493 * lower it.
3494 */
3495 SCTP_INP_DECR_REF(inp_tmp);
3496 /* unlock info */
3497 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3498 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3499 /* Ok, must be one-2-one and allowing port re-use */
3500 port_reuse_active = 1;
3501 goto continue_anyway;
3502 }
3503 SCTP_INP_DECR_REF(inp);
3504 SCTP_INP_INFO_WUNLOCK();
3505 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3506 return (EADDRINUSE);
3507 }
3508 #ifdef SCTP_MVRF
3509 }
3510 #endif
3511 } else {
3512 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3513 if (inp_tmp != NULL) {
3514 /*
3515 * lock guy returned and lower count note
3516 * that we are not bound so inp_tmp should
3517 * NEVER be inp. And it is this inp (inp_tmp)
3518 * that gets the reference bump, so we must
3519 * lower it.
3520 */
3521 SCTP_INP_DECR_REF(inp_tmp);
3522 /* unlock info */
3523 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3524 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3525 /* Ok, must be one-2-one and allowing port re-use */
3526 port_reuse_active = 1;
3527 goto continue_anyway;
3528 }
3529 SCTP_INP_DECR_REF(inp);
3530 SCTP_INP_INFO_WUNLOCK();
3531 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3532 return (EADDRINUSE);
3533 }
3534 }
3535 continue_anyway:
3536 SCTP_INP_WLOCK(inp);
3537 if (bindall) {
3538 /* verify that no lport is not used by a singleton */
3539 if ((port_reuse_active == 0) &&
3540 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3541 /* Sorry someone already has this one bound */
3542 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3543 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3544 port_reuse_active = 1;
3545 } else {
3546 SCTP_INP_DECR_REF(inp);
3547 SCTP_INP_WUNLOCK(inp);
3548 SCTP_INP_INFO_WUNLOCK();
3549 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3550 return (EADDRINUSE);
3551 }
3552 }
3553 }
3554 } else {
3555 uint16_t first, last, candidate;
3556 uint16_t count;
3557 int done;
3558
3559 #if defined(__Windows__)
3560 first = 1;
3561 last = 0xffff;
3562 #else
3563 #if defined(__Userspace__)
3564 /* TODO ensure uid is 0, etc... */
3565 #elif defined(__FreeBSD__) || defined(__APPLE__)
3566 if (ip_inp->inp_flags & INP_HIGHPORT) {
3567 first = MODULE_GLOBAL(ipport_hifirstauto);
3568 last = MODULE_GLOBAL(ipport_hilastauto);
3569 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3570 if (p && (error =
3571 #ifdef __FreeBSD__
3572 #if __FreeBSD_version > 602000
3573 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3574 #elif __FreeBSD_version >= 500000
3575 suser_cred(p->td_ucred, 0)
3576 #else
3577 suser(p)
3578 #endif
3579 #elif defined(__APPLE__)
3580 suser(p->p_ucred, &p->p_acflag)
3581 #else
3582 suser(p, 0)
3583 #endif
3584 )) {
3585 SCTP_INP_DECR_REF(inp);
3586 SCTP_INP_WUNLOCK(inp);
3587 SCTP_INP_INFO_WUNLOCK();
3588 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3589 return (error);
3590 }
3591 first = MODULE_GLOBAL(ipport_lowfirstauto);
3592 last = MODULE_GLOBAL(ipport_lowlastauto);
3593 } else {
3594 #endif
3595 first = MODULE_GLOBAL(ipport_firstauto);
3596 last = MODULE_GLOBAL(ipport_lastauto);
3597 #if defined(__FreeBSD__) || defined(__APPLE__)
3598 }
3599 #endif
3600 #endif /* __Windows__ */
3601 if (first > last) {
3602 uint16_t temp;
3603
3604 temp = first;
3605 first = last;
3606 last = temp;
3607 }
3608 count = last - first + 1; /* number of candidates */
3609 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3610
3611 done = 0;
3612 while (!done) {
3613 #ifdef SCTP_MVRF
3614 for (i = 0; i < inp->num_vrfs; i++) {
3615 if (sctp_isport_inuse(inp, htons(candidate), inp->m_vrf_ids[i]) != NULL) {
3616 break;
3617 }
3618 }
3619 if (i == inp->num_vrfs) {
3620 done = 1;
3621 }
3622 #else
3623 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3624 done = 1;
3625 }
3626 #endif
3627 if (!done) {
3628 if (--count == 0) {
3629 SCTP_INP_DECR_REF(inp);
3630 SCTP_INP_WUNLOCK(inp);
3631 SCTP_INP_INFO_WUNLOCK();
3632 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3633 return (EADDRINUSE);
3634 }
3635 if (candidate == last)
3636 candidate = first;
3637 else
3638 candidate = candidate + 1;
3639 }
3640 }
3641 lport = htons(candidate);
3642 }
3643 SCTP_INP_DECR_REF(inp);
3644 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3645 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3646 /*
3647 * this really should not happen. The guy did a non-blocking
3648 * bind and then did a close at the same time.
3649 */
3650 SCTP_INP_WUNLOCK(inp);
3651 SCTP_INP_INFO_WUNLOCK();
3652 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3653 return (EINVAL);
3654 }
3655 /* ok we look clear to give out this port, so lets setup the binding */
3656 if (bindall) {
3657 /* binding to all addresses, so just set in the proper flags */
3658 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3659 /* set the automatic addr changes from kernel flag */
3660 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3661 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3662 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3663 } else {
3664 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3665 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3666 }
3667 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3668 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3669 } else {
3670 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3671 }
3672 /* set the automatic mobility_base from kernel
3673 flag (by micchie)
3674 */
3675 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3676 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3677 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3678 } else {
3679 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3680 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3681 }
3682 /* set the automatic mobility_fasthandoff from kernel
3683 flag (by micchie)
3684 */
3685 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3686 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3687 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3688 } else {
3689 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3690 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3691 }
3692 } else {
3693 /*
3694 * bind specific, make sure flags is off and add a new
3695 * address structure to the sctp_addr_list inside the ep
3696 * structure.
3697 *
3698 * We will need to allocate one and insert it at the head. The
3699 * socketopt call can just insert new addresses in there as
3700 * well. It will also have to do the embed scope kame hack
3701 * too (before adding).
3702 */
3703 struct sctp_ifa *ifa;
3704 union sctp_sockstore store;
3705
3706 memset(&store, 0, sizeof(store));
3707 switch (addr->sa_family) {
3708 #ifdef INET
3709 case AF_INET:
3710 memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3711 store.sin.sin_port = 0;
3712 break;
3713 #endif
3714 #ifdef INET6
3715 case AF_INET6:
3716 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3717 store.sin6.sin6_port = 0;
3718 break;
3719 #endif
3720 #if defined(__Userspace__)
3721 case AF_CONN:
3722 memcpy(&store.sconn, addr, sizeof(struct sockaddr_conn));
3723 store.sconn.sconn_port = 0;
3724 break;
3725 #endif
3726 default:
3727 break;
3728 }
3729 /*
3730 * first find the interface with the bound address need to
3731 * zero out the port to find the address! yuck! can't do
3732 * this earlier since need port for sctp_pcb_findep()
3733 */
3734 if (sctp_ifap != NULL) {
3735 ifa = sctp_ifap;
3736 } else {
3737 /* Note for BSD we hit here always other
3738 * O/S's will pass things in via the
3739 * sctp_ifap argument (Panda).
3740 */
3741 ifa = sctp_find_ifa_by_addr(&store.sa,
3742 vrf_id, SCTP_ADDR_NOT_LOCKED);
3743 }
3744 if (ifa == NULL) {
3745 /* Can't find an interface with that address */
3746 SCTP_INP_WUNLOCK(inp);
3747 SCTP_INP_INFO_WUNLOCK();
3748 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3749 return (EADDRNOTAVAIL);
3750 }
3751 #ifdef INET6
3752 if (addr->sa_family == AF_INET6) {
3753 /* GAK, more FIXME IFA lock? */
3754 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3755 /* Can't bind a non-existent addr. */
3756 SCTP_INP_WUNLOCK(inp);
3757 SCTP_INP_INFO_WUNLOCK();
3758 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3759 return (EINVAL);
3760 }
3761 }
3762 #endif
3763 /* we're not bound all */
3764 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3765 /* allow bindx() to send ASCONF's for binding changes */
3766 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3767 /* clear automatic addr changes from kernel flag */
3768 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3769
3770 /* add this address to the endpoint list */
3771 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3772 if (error != 0) {
3773 SCTP_INP_WUNLOCK(inp);
3774 SCTP_INP_INFO_WUNLOCK();
3775 return (error);
3776 }
3777 inp->laddr_count++;
3778 }
3779 /* find the bucket */
3780 if (port_reuse_active) {
3781 /* Put it into tcp 1-2-1 hash */
3782 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3783 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3784 } else {
3785 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3786 }
3787 /* put it in the bucket */
3788 LIST_INSERT_HEAD(head, inp, sctp_hash);
3789 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3790 (void *)head, ntohs(lport), port_reuse_active);
3791 /* set in the port */
3792 inp->sctp_lport = lport;
3793
3794 /* turn off just the unbound flag */
3795 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3796 SCTP_INP_WUNLOCK(inp);
3797 SCTP_INP_INFO_WUNLOCK();
3798 return (0);
3799 }
3800
3801
3802 static void
3803 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3804 {
3805 struct sctp_iterator *it, *nit;
3806
3807 /*
3808 * We enter with the only the ITERATOR_LOCK in place and a write
3809 * lock on the inp_info stuff.
3810 */
3811 it = sctp_it_ctl.cur_it;
3812 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
3813 if (it && (it->vn != curvnet)) {
3814 /* Its not looking at our VNET */
3815 return;
3816 }
3817 #endif
3818 if (it && (it->inp == inp)) {
3819 /*
3820 * This is tricky and we hold the iterator lock,
3821 * but when it returns and gets the lock (when we
3822 * release it) the iterator will try to operate on
3823 * inp. We need to stop that from happening. But
3824 * of course the iterator has a reference on the
3825 * stcb and inp. We can mark it and it will stop.
3826 *
3827 * If its a single iterator situation, we
3828 * set the end iterator flag. Otherwise
3829 * we set the iterator to go to the next inp.
3830 *
3831 */
3832 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3833 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3834 } else {
3835 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3836 }
3837 }
3838 /* Now go through and remove any single reference to
3839 * our inp that may be still pending on the list
3840 */
3841 SCTP_IPI_ITERATOR_WQ_LOCK();
3842 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3843 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
3844 if (it->vn != curvnet) {
3845 continue;
3846 }
3847 #endif
3848 if (it->inp == inp) {
3849 /* This one points to me is it inp specific? */
3850 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3851 /* Remove and free this one */
3852 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3853 it, sctp_nxt_itr);
3854 if (it->function_atend != NULL) {
3855 (*it->function_atend) (it->pointer, it->val);
3856 }
3857 SCTP_FREE(it, SCTP_M_ITER);
3858 } else {
3859 it->inp = LIST_NEXT(it->inp, sctp_list);
3860 if (it->inp) {
3861 SCTP_INP_INCR_REF(it->inp);
3862 }
3863 }
3864 /* When its put in the refcnt is incremented so decr it */
3865 SCTP_INP_DECR_REF(inp);
3866 }
3867 }
3868 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3869 }
3870
3871 /* release sctp_inpcb unbind the port */
3872 void
3873 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3874 {
3875 /*
3876 * Here we free a endpoint. We must find it (if it is in the Hash
3877 * table) and remove it from there. Then we must also find it in the
3878 * overall list and remove it from there. After all removals are
3879 * complete then any timer has to be stopped. Then start the actual
3880 * freeing. a) Any local lists. b) Any associations. c) The hash of
3881 * all associations. d) finally the ep itself.
3882 */
3883 struct sctp_tcb *asoc, *nasoc;
3884 struct sctp_laddr *laddr, *nladdr;
3885 struct inpcb *ip_pcb;
3886 struct socket *so;
3887 int being_refed = 0;
3888 struct sctp_queued_to_read *sq, *nsq;
3889 #if !defined(__Panda__) && !defined(__Userspace__)
3890 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
3891 sctp_rtentry_t *rt;
3892 #endif
3893 #endif
3894 int cnt;
3895 sctp_sharedkey_t *shared_key, *nshared_key;
3896
3897
3898 #if defined(__APPLE__)
3899 sctp_lock_assert(SCTP_INP_SO(inp));
3900 #endif
3901 #ifdef SCTP_LOG_CLOSING
3902 sctp_log_closing(inp, NULL, 0);
3903 #endif
3904 SCTP_ITERATOR_LOCK();
3905 /* mark any iterators on the list or being processed */
3906 sctp_iterator_inp_being_freed(inp);
3907 SCTP_ITERATOR_UNLOCK();
3908 so = inp->sctp_socket;
3909 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3910 /* been here before.. eeks.. get out of here */
3911 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3912 #ifdef SCTP_LOG_CLOSING
3913 sctp_log_closing(inp, NULL, 1);
3914 #endif
3915 return;
3916 }
3917 SCTP_ASOC_CREATE_LOCK(inp);
3918 SCTP_INP_INFO_WLOCK();
3919
3920 SCTP_INP_WLOCK(inp);
3921 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3922 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3923 /* socket is gone, so no more wakeups allowed */
3924 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3925 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3926 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3927
3928 }
3929 /* First time through we have the socket lock, after that no more. */
3930 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3931 SCTP_FROM_SCTP_PCB+SCTP_LOC_1);
3932
3933 if (inp->control) {
3934 sctp_m_freem(inp->control);
3935 inp->control = NULL;
3936 }
3937 if (inp->pkt) {
3938 sctp_m_freem(inp->pkt);
3939 inp->pkt = NULL;
3940 }
3941 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3942 * here but I will be nice :> (i.e.
3943 * ip_pcb = ep;) */
3944 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3945 int cnt_in_sd;
3946
3947 cnt_in_sd = 0;
3948 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3949 SCTP_TCB_LOCK(asoc);
3950 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3951 /* Skip guys being freed */
3952 cnt_in_sd++;
3953 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3954 /*
3955 * Special case - we did not start a kill
3956 * timer on the asoc due to it was not
3957 * closed. So go ahead and start it now.
3958 */
3959 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3960 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3961 }
3962 SCTP_TCB_UNLOCK(asoc);
3963 continue;
3964 }
3965 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3966 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3967 (asoc->asoc.total_output_queue_size == 0)) {
3968 /* If we have data in queue, we don't want to just
3969 * free since the app may have done, send()/close
3970 * or connect/send/close. And it wants the data
3971 * to get across first.
3972 */
3973 /* Just abandon things in the front states */
3974 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3975 SCTP_FROM_SCTP_PCB+SCTP_LOC_2) == 0) {
3976 cnt_in_sd++;
3977 }
3978 continue;
3979 }
3980 /* Disconnect the socket please */
3981 asoc->sctp_socket = NULL;
3982 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3983 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3984 (asoc->asoc.control_pdapi) ||
3985 (asoc->asoc.size_on_all_streams > 0) ||
3986 (so && (so->so_rcv.sb_cc > 0))) {
3987 /* Left with Data unread */
3988 struct mbuf *op_err;
3989
3990 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3991 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_3;
3992 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3993 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3994 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3995 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3996 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3997 }
3998 if (sctp_free_assoc(inp, asoc,
3999 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB+SCTP_LOC_4) == 0) {
4000 cnt_in_sd++;
4001 }
4002 continue;
4003 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
4004 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
4005 (asoc->asoc.stream_queue_cnt == 0)) {
4006 if (asoc->asoc.locked_on_sending) {
4007 goto abort_anyway;
4008 }
4009 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
4010 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
4011 struct sctp_nets *netp;
4012
4013 /*
4014 * there is nothing queued to send,
4015 * so I send shutdown
4016 */
4017 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
4018 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4019 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4020 }
4021 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
4022 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
4023 sctp_stop_timers_for_shutdown(asoc);
4024 if (asoc->asoc.alternate) {
4025 netp = asoc->asoc.alternate;
4026 } else {
4027 netp = asoc->asoc.primary_destination;
4028 }
4029 sctp_send_shutdown(asoc, netp);
4030 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
4031 netp);
4032 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
4033 asoc->asoc.primary_destination);
4034 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
4035 }
4036 } else {
4037 /* mark into shutdown pending */
4038 struct sctp_stream_queue_pending *sp;
4039
4040 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
4041 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
4042 asoc->asoc.primary_destination);
4043 if (asoc->asoc.locked_on_sending) {
4044 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
4045 sctp_streamhead);
4046 if (sp == NULL) {
4047 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
4048 (void *)asoc->asoc.locked_on_sending,
4049 asoc->asoc.locked_on_sending->stream_no);
4050 } else {
4051 if ((sp->length == 0) && (sp->msg_is_complete == 0))
4052 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
4053 }
4054 }
4055 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
4056 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
4057 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
4058 struct mbuf *op_err;
4059 abort_anyway:
4060 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
4061 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_5;
4062 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4063 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4064 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
4065 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4066 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4067 }
4068 if (sctp_free_assoc(inp, asoc,
4069 SCTP_PCBFREE_NOFORCE,
4070 SCTP_FROM_SCTP_PCB+SCTP_LOC_6) == 0) {
4071 cnt_in_sd++;
4072 }
4073 continue;
4074 } else {
4075 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
4076 }
4077 }
4078 cnt_in_sd++;
4079 SCTP_TCB_UNLOCK(asoc);
4080 }
4081 /* now is there some left in our SHUTDOWN state? */
4082 if (cnt_in_sd) {
4083 #ifdef SCTP_LOG_CLOSING
4084 sctp_log_closing(inp, NULL, 2);
4085 #endif
4086 inp->sctp_socket = NULL;
4087 SCTP_INP_WUNLOCK(inp);
4088 SCTP_ASOC_CREATE_UNLOCK(inp);
4089 SCTP_INP_INFO_WUNLOCK();
4090 return;
4091 }
4092 }
4093 inp->sctp_socket = NULL;
4094 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
4095 SCTP_PCB_FLAGS_UNBOUND) {
4096 /*
4097 * ok, this guy has been bound. It's port is
4098 * somewhere in the SCTP_BASE_INFO(hash table). Remove
4099 * it!
4100 */
4101 LIST_REMOVE(inp, sctp_hash);
4102 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
4103 }
4104
4105 /* If there is a timer running to kill us,
4106 * forget it, since it may have a contest
4107 * on the INP lock.. which would cause us
4108 * to die ...
4109 */
4110 cnt = 0;
4111 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
4112 SCTP_TCB_LOCK(asoc);
4113 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4114 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
4115 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4116 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
4117 }
4118 cnt++;
4119 SCTP_TCB_UNLOCK(asoc);
4120 continue;
4121 }
4122 /* Free associations that are NOT killing us */
4123 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
4124 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
4125 struct mbuf *op_err;
4126
4127 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
4128 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_7;
4129 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4130 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4131 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4132 cnt++;
4133 SCTP_TCB_UNLOCK(asoc);
4134 continue;
4135 }
4136 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
4137 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4138 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4139 }
4140 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB+SCTP_LOC_8) == 0) {
4141 cnt++;
4142 }
4143 }
4144 if (cnt) {
4145 /* Ok we have someone out there that will kill us */
4146 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4147 #ifdef SCTP_LOG_CLOSING
4148 sctp_log_closing(inp, NULL, 3);
4149 #endif
4150 SCTP_INP_WUNLOCK(inp);
4151 SCTP_ASOC_CREATE_UNLOCK(inp);
4152 SCTP_INP_INFO_WUNLOCK();
4153 return;
4154 }
4155 if (SCTP_INP_LOCK_CONTENDED(inp))
4156 being_refed++;
4157 if (SCTP_INP_READ_CONTENDED(inp))
4158 being_refed++;
4159 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
4160 being_refed++;
4161
4162 if ((inp->refcount) ||
4163 (being_refed) ||
4164 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
4165 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4166 #ifdef SCTP_LOG_CLOSING
4167 sctp_log_closing(inp, NULL, 4);
4168 #endif
4169 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
4170 SCTP_INP_WUNLOCK(inp);
4171 SCTP_ASOC_CREATE_UNLOCK(inp);
4172 SCTP_INP_INFO_WUNLOCK();
4173 return;
4174 }
4175 inp->sctp_ep.signature_change.type = 0;
4176 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
4177 /* Remove it from the list .. last thing we need a
4178 * lock for.
4179 */
4180 LIST_REMOVE(inp, sctp_list);
4181 SCTP_INP_WUNLOCK(inp);
4182 SCTP_ASOC_CREATE_UNLOCK(inp);
4183 SCTP_INP_INFO_WUNLOCK();
4184 /* Now we release all locks. Since this INP
4185 * cannot be found anymore except possibly by the
4186 * kill timer that might be running. We call
4187 * the drain function here. It should hit the case
4188 * were it sees the ACTIVE flag cleared and exit
4189 * out freeing us to proceed and destroy everything.
4190 */
4191 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
4192 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
4193 } else {
4194 /* Probably un-needed */
4195 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4196 }
4197
4198 #ifdef SCTP_LOG_CLOSING
4199 sctp_log_closing(inp, NULL, 5);
4200 #endif
4201
4202 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4203 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
4204 rt = ip_pcb->inp_route.ro_rt;
4205 #endif
4206 #endif
4207
4208 #if defined(__Panda__)
4209 if (inp->pak_to_read) {
4210 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.zero_copy_timer.timer);
4211 SCTP_RELEASE_PKT(inp->pak_to_read);
4212 inp->pak_to_read = NULL;
4213 }
4214 if (inp->pak_to_read_sendq) {
4215 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.zero_copy_sendq_timer.timer);
4216 SCTP_RELEASE_PKT(inp->pak_to_read_sendq);
4217 inp->pak_to_read_sendq = NULL;
4218 }
4219 #endif
4220 if ((inp->sctp_asocidhash) != NULL) {
4221 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
4222 inp->sctp_asocidhash = NULL;
4223 }
4224 /*sa_ignore FREED_MEMORY*/
4225 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
4226 /* Its only abandoned if it had data left */
4227 if (sq->length)
4228 SCTP_STAT_INCR(sctps_left_abandon);
4229
4230 TAILQ_REMOVE(&inp->read_queue, sq, next);
4231 sctp_free_remote_addr(sq->whoFrom);
4232 if (so)
4233 so->so_rcv.sb_cc -= sq->length;
4234 if (sq->data) {
4235 sctp_m_freem(sq->data);
4236 sq->data = NULL;
4237 }
4238 /*
4239 * no need to free the net count, since at this point all
4240 * assoc's are gone.
4241 */
4242 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4243 SCTP_DECR_READQ_COUNT();
4244 }
4245 /* Now the sctp_pcb things */
4246 /*
4247 * free each asoc if it is not already closed/free. we can't use the
4248 * macro here since le_next will get freed as part of the
4249 * sctp_free_assoc() call.
4250 */
4251 if (so) {
4252 #ifdef IPSEC
4253 ipsec_delete_pcbpolicy(ip_pcb);
4254 #endif /* IPSEC */
4255
4256 /* Unlocks not needed since the socket is gone now */
4257 }
4258 #ifndef __Panda__
4259 if (ip_pcb->inp_options) {
4260 (void)sctp_m_free(ip_pcb->inp_options);
4261 ip_pcb->inp_options = 0;
4262 }
4263 #endif
4264
4265 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4266 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
4267 if (rt) {
4268 RTFREE(rt);
4269 ip_pcb->inp_route.ro_rt = 0;
4270 }
4271 #endif
4272 #if defined(__FreeBSD__) && __FreeBSD_version < 803000
4273 #ifdef INET
4274 if (ip_pcb->inp_moptions) {
4275 inp_freemoptions(ip_pcb->inp_moptions);
4276 ip_pcb->inp_moptions = 0;
4277 }
4278 #endif
4279 #endif
4280 #endif
4281
4282 #ifdef INET6
4283 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4284 #if defined(__FreeBSD__) || defined(__APPLE__)
4285 if (ip_pcb->inp_vflag & INP_IPV6) {
4286 #else
4287 if (inp->inp_vflag & INP_IPV6) {
4288 #endif
4289 struct in6pcb *in6p;
4290
4291 in6p = (struct in6pcb *)inp;
4292 ip6_freepcbopts(in6p->in6p_outputopts);
4293 }
4294 #endif
4295 #endif /* INET6 */
4296 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
4297 inp->inp_vflag = 0;
4298 #else
4299 ip_pcb->inp_vflag = 0;
4300 #endif
4301 /* free up authentication fields */
4302 if (inp->sctp_ep.local_auth_chunks != NULL)
4303 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
4304 if (inp->sctp_ep.local_hmacs != NULL)
4305 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
4306
4307 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
4308 LIST_REMOVE(shared_key, next);
4309 sctp_free_sharedkey(shared_key);
4310 /*sa_ignore FREED_MEMORY*/
4311 }
4312
4313 #if defined(__APPLE__)
4314 inp->ip_inp.inp.inp_state = INPCB_STATE_DEAD;
4315 if (in_pcb_checkstate(&inp->ip_inp.inp, WNT_STOPUSING, 1) != WNT_STOPUSING) {
4316 #ifdef INVARIANTS
4317 panic("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4318 #else
4319 SCTP_PRINTF("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4320 #endif
4321 }
4322 inp->ip_inp.inp.inp_socket->so_flags |= SOF_PCBCLEARING;
4323 #endif
4324 /*
4325 * if we have an address list the following will free the list of
4326 * ifaddr's that are set into this ep. Again macro limitations here,
4327 * since the LIST_FOREACH could be a bad idea.
4328 */
4329 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
4330 sctp_remove_laddr(laddr);
4331 }
4332
4333 #ifdef SCTP_TRACK_FREED_ASOCS
4334 /* TEMP CODE */
4335 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
4336 LIST_REMOVE(asoc, sctp_tcblist);
4337 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
4338 SCTP_DECR_ASOC_COUNT();
4339 }
4340 /* *** END TEMP CODE ****/
4341 #endif
4342 #ifdef SCTP_MVRF
4343 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
4344 #endif
4345 /* Now lets see about freeing the EP hash table. */
4346 if (inp->sctp_tcbhash != NULL) {
4347 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
4348 inp->sctp_tcbhash = NULL;
4349 }
4350 /* Now we must put the ep memory back into the zone pool */
4351 #if defined(__FreeBSD__)
4352 crfree(inp->ip_inp.inp.inp_cred);
4353 INP_LOCK_DESTROY(&inp->ip_inp.inp);
4354 #endif
4355 SCTP_INP_LOCK_DESTROY(inp);
4356 SCTP_INP_READ_DESTROY(inp);
4357 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
4358 #if !defined(__APPLE__)
4359 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
4360 SCTP_DECR_EP_COUNT();
4361 #else
4362 /* For Tiger, we will do this later... */
4363 #endif
4364 }
4365
4366
4367 struct sctp_nets *
4368 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
4369 {
4370 struct sctp_nets *net;
4371 /* locate the address */
4372 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4373 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
4374 return (net);
4375 }
4376 return (NULL);
4377 }
4378
4379
4380 int
4381 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
4382 {
4383 #ifdef __Panda__
4384 return (0);
4385 #else
4386 struct sctp_ifa *sctp_ifa;
4387 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
4388 if (sctp_ifa) {
4389 return (1);
4390 } else {
4391 return (0);
4392 }
4393 #endif
4394 }
4395
4396 /*
4397 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
4398 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
4399 * stats of stuff.
4400 */
4401 int
4402 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
4403 struct sctp_nets **netp, int set_scope, int from)
4404 {
4405 /*
4406 * The following is redundant to the same lines in the
4407 * sctp_aloc_assoc() but is needed since others call the add
4408 * address function
4409 */
4410 struct sctp_nets *net, *netfirst;
4411 int addr_inscope;
4412
4413 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
4414 from);
4415 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
4416
4417 netfirst = sctp_findnet(stcb, newaddr);
4418 if (netfirst) {
4419 /*
4420 * Lie and return ok, we don't want to make the association
4421 * go away for this behavior. It will happen in the TCP
4422 * model in a connected socket. It does not reach the hash
4423 * table until after the association is built so it can't be
4424 * found. Mark as reachable, since the initial creation will
4425 * have been cleared and the NOT_IN_ASSOC flag will have
4426 * been added... and we don't want to end up removing it
4427 * back out.
4428 */
4429 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
4430 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
4431 SCTP_ADDR_UNCONFIRMED);
4432 } else {
4433 netfirst->dest_state = SCTP_ADDR_REACHABLE;
4434 }
4435
4436 return (0);
4437 }
4438 addr_inscope = 1;
4439 switch (newaddr->sa_family) {
4440 #ifdef INET
4441 case AF_INET:
4442 {
4443 struct sockaddr_in *sin;
4444
4445 sin = (struct sockaddr_in *)newaddr;
4446 if (sin->sin_addr.s_addr == 0) {
4447 /* Invalid address */
4448 return (-1);
4449 }
4450 /* zero out the bzero area */
4451 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
4452
4453 /* assure len is set */
4454 #ifdef HAVE_SIN_LEN
4455 sin->sin_len = sizeof(struct sockaddr_in);
4456 #endif
4457 if (set_scope) {
4458 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
4459 stcb->asoc.scope.ipv4_local_scope = 1;
4460 #else
4461 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
4462 stcb->asoc.scope.ipv4_local_scope = 1;
4463 }
4464 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
4465 } else {
4466 /* Validate the address is in scope */
4467 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
4468 (stcb->asoc.scope.ipv4_local_scope == 0)) {
4469 addr_inscope = 0;
4470 }
4471 }
4472 break;
4473 }
4474 #endif
4475 #ifdef INET6
4476 case AF_INET6:
4477 {
4478 struct sockaddr_in6 *sin6;
4479
4480 sin6 = (struct sockaddr_in6 *)newaddr;
4481 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
4482 /* Invalid address */
4483 return (-1);
4484 }
4485 /* assure len is set */
4486 #ifdef HAVE_SIN6_LEN
4487 sin6->sin6_len = sizeof(struct sockaddr_in6);
4488 #endif
4489 if (set_scope) {
4490 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
4491 stcb->asoc.scope.loopback_scope = 1;
4492 stcb->asoc.scope.local_scope = 0;
4493 stcb->asoc.scope.ipv4_local_scope = 1;
4494 stcb->asoc.scope.site_scope = 1;
4495 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
4496 /*
4497 * If the new destination is a LINK_LOCAL we
4498 * must have common site scope. Don't set
4499 * the local scope since we may not share
4500 * all links, only loopback can do this.
4501 * Links on the local network would also be
4502 * on our private network for v4 too.
4503 */
4504 stcb->asoc.scope.ipv4_local_scope = 1;
4505 stcb->asoc.scope.site_scope = 1;
4506 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
4507 /*
4508 * If the new destination is SITE_LOCAL then
4509 * we must have site scope in common.
4510 */
4511 stcb->asoc.scope.site_scope = 1;
4512 }
4513 } else {
4514 /* Validate the address is in scope */
4515 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
4516 (stcb->asoc.scope.loopback_scope == 0)) {
4517 addr_inscope = 0;
4518 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
4519 (stcb->asoc.scope.local_scope == 0)) {
4520 addr_inscope = 0;
4521 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
4522 (stcb->asoc.scope.site_scope == 0)) {
4523 addr_inscope = 0;
4524 }
4525 }
4526 break;
4527 }
4528 #endif
4529 #if defined(__Userspace__)
4530 case AF_CONN:
4531 {
4532 struct sockaddr_conn *sconn;
4533
4534 sconn = (struct sockaddr_conn *)newaddr;
4535 if (sconn->sconn_addr == NULL) {
4536 /* Invalid address */
4537 return (-1);
4538 }
4539 #ifdef HAVE_SCONN_LEN
4540 sconn->sconn_len = sizeof(struct sockaddr_conn);
4541 #endif
4542 break;
4543 }
4544 #endif
4545 default:
4546 /* not supported family type */
4547 return (-1);
4548 }
4549 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
4550 if (net == NULL) {
4551 return (-1);
4552 }
4553 SCTP_INCR_RADDR_COUNT();
4554 bzero(net, sizeof(struct sctp_nets));
4555 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
4556 #ifdef HAVE_SA_LEN
4557 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
4558 #endif
4559 switch (newaddr->sa_family) {
4560 #ifdef INET
4561 case AF_INET:
4562 #ifndef HAVE_SA_LEN
4563 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in));
4564 #endif
4565 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
4566 break;
4567 #endif
4568 #ifdef INET6
4569 case AF_INET6:
4570 #ifndef HAVE_SA_LEN
4571 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in6));
4572 #endif
4573 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
4574 break;
4575 #endif
4576 #if defined(__Userspace__)
4577 case AF_CONN:
4578 #ifndef HAVE_SA_LEN
4579 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_conn));
4580 #endif
4581 ((struct sockaddr_conn *)&net->ro._l_addr)->sconn_port = stcb->rport;
4582 break;
4583 #endif
4584 default:
4585 break;
4586 }
4587 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
4588 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
4589 stcb->asoc.scope.loopback_scope = 1;
4590 stcb->asoc.scope.ipv4_local_scope = 1;
4591 stcb->asoc.scope.local_scope = 0;
4592 stcb->asoc.scope.site_scope = 1;
4593 addr_inscope = 1;
4594 }
4595 net->failure_threshold = stcb->asoc.def_net_failure;
4596 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
4597 if (addr_inscope == 0) {
4598 net->dest_state = (SCTP_ADDR_REACHABLE |
4599 SCTP_ADDR_OUT_OF_SCOPE);
4600 } else {
4601 if (from == SCTP_ADDR_IS_CONFIRMED)
4602 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
4603 net->dest_state = SCTP_ADDR_REACHABLE;
4604 else
4605 net->dest_state = SCTP_ADDR_REACHABLE |
4606 SCTP_ADDR_UNCONFIRMED;
4607 }
4608 /* We set this to 0, the timer code knows that
4609 * this means its an initial value
4610 */
4611 net->rto_needed = 1;
4612 net->RTO = 0;
4613 net->RTO_measured = 0;
4614 stcb->asoc.numnets++;
4615 net->ref_count = 1;
4616 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4617 net->port = stcb->asoc.port;
4618 net->dscp = stcb->asoc.default_dscp;
4619 #ifdef INET6
4620 net->flowlabel = stcb->asoc.default_flowlabel;
4621 #endif
4622 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4623 net->dest_state |= SCTP_ADDR_NOHB;
4624 } else {
4625 net->dest_state &= ~SCTP_ADDR_NOHB;
4626 }
4627 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4628 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4629 } else {
4630 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4631 }
4632 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4633 /* Init the timer structure */
4634 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4635 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4636 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4637
4638 /* Now generate a route for this guy */
4639 #ifdef INET6
4640 #ifdef SCTP_EMBEDDED_V6_SCOPE
4641 /* KAME hack: embed scopeid */
4642 if (newaddr->sa_family == AF_INET6) {
4643 struct sockaddr_in6 *sin6;
4644
4645 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4646 #if defined(__APPLE__)
4647 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
4648 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL);
4649 #else
4650 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL, NULL);
4651 #endif
4652 #elif defined(SCTP_KAME)
4653 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4654 #else
4655 (void)in6_embedscope(&sin6->sin6_addr, sin6);
4656 #endif
4657 #ifndef SCOPEDROUTING
4658 sin6->sin6_scope_id = 0;
4659 #endif
4660 }
4661 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4662 #endif
4663 SCTP_RTALLOC((sctp_route_t *)&net->ro, stcb->asoc.vrf_id);
4664
4665 #if defined(__Userspace__)
4666 net->src_addr_selected = 0;
4667 #else
4668 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4669 /* Get source address */
4670 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4671 stcb,
4672 (sctp_route_t *)&net->ro,
4673 net,
4674 0,
4675 stcb->asoc.vrf_id);
4676 if (net->ro._s_addr != NULL) {
4677 net->src_addr_selected = 1;
4678 /* Now get the interface MTU */
4679 if (net->ro._s_addr->ifn_p != NULL) {
4680 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4681 }
4682 } else {
4683 net->src_addr_selected = 0;
4684 }
4685 if (net->mtu > 0) {
4686 uint32_t rmtu;
4687
4688 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4689 if (rmtu == 0) {
4690 /* Start things off to match mtu of interface please. */
4691 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4692 net->ro.ro_rt, net->mtu);
4693 } else {
4694 /* we take the route mtu over the interface, since
4695 * the route may be leading out the loopback, or
4696 * a different interface.
4697 */
4698 net->mtu = rmtu;
4699 }
4700 }
4701 } else {
4702 net->src_addr_selected = 0;
4703 }
4704 #endif
4705 if (net->mtu == 0) {
4706 switch (newaddr->sa_family) {
4707 #ifdef INET
4708 case AF_INET:
4709 net->mtu = SCTP_DEFAULT_MTU;
4710 break;
4711 #endif
4712 #ifdef INET6
4713 case AF_INET6:
4714 net->mtu = 1280;
4715 break;
4716 #endif
4717 #if defined(__Userspace__)
4718 case AF_CONN:
4719 net->mtu = 1280;
4720 break;
4721 #endif
4722 default:
4723 break;
4724 }
4725 }
4726 #if defined(INET) || defined(INET6)
4727 if (net->port) {
4728 net->mtu -= (uint32_t)sizeof(struct udphdr);
4729 }
4730 #endif
4731 if (from == SCTP_ALLOC_ASOC) {
4732 stcb->asoc.smallest_mtu = net->mtu;
4733 }
4734 if (stcb->asoc.smallest_mtu > net->mtu) {
4735 stcb->asoc.smallest_mtu = net->mtu;
4736 }
4737 #ifdef INET6
4738 #ifdef SCTP_EMBEDDED_V6_SCOPE
4739 if (newaddr->sa_family == AF_INET6) {
4740 struct sockaddr_in6 *sin6;
4741
4742 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4743 #ifdef SCTP_KAME
4744 (void)sa6_recoverscope(sin6);
4745 #else
4746 (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
4747 #endif /* SCTP_KAME */
4748 }
4749 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4750 #endif
4751
4752 /* JRS - Use the congestion control given in the CC module */
4753 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4754 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param)(stcb, net);
4755
4756 /*
4757 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4758 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4759 */
4760 net->find_pseudo_cumack = 1;
4761 net->find_rtx_pseudo_cumack = 1;
4762 #if defined(__FreeBSD__)
4763 /* Choose an initial flowid. */
4764 net->flowid = stcb->asoc.my_vtag ^
4765 ntohs(stcb->rport) ^
4766 ntohs(stcb->sctp_ep->sctp_lport);
4767 #ifdef INVARIANTS
4768 net->flowidset = 1;
4769 #endif
4770 #endif
4771 if (netp) {
4772 *netp = net;
4773 }
4774 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4775 if (net->ro.ro_rt == NULL) {
4776 /* Since we have no route put it at the back */
4777 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4778 } else if (netfirst == NULL) {
4779 /* We are the first one in the pool. */
4780 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4781 } else if (netfirst->ro.ro_rt == NULL) {
4782 /*
4783 * First one has NO route. Place this one ahead of the first
4784 * one.
4785 */
4786 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4787 #ifndef __Panda__
4788 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4789 /*
4790 * This one has a different interface than the one at the
4791 * top of the list. Place it ahead.
4792 */
4793 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4794 #endif
4795 } else {
4796 /*
4797 * Ok we have the same interface as the first one. Move
4798 * forward until we find either a) one with a NULL route...
4799 * insert ahead of that b) one with a different ifp.. insert
4800 * after that. c) end of the list.. insert at the tail.
4801 */
4802 struct sctp_nets *netlook;
4803
4804 do {
4805 netlook = TAILQ_NEXT(netfirst, sctp_next);
4806 if (netlook == NULL) {
4807 /* End of the list */
4808 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4809 break;
4810 } else if (netlook->ro.ro_rt == NULL) {
4811 /* next one has NO route */
4812 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4813 break;
4814 }
4815 #ifndef __Panda__
4816 else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp)
4817 #else
4818 else
4819 #endif
4820 {
4821 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4822 net, sctp_next);
4823 break;
4824 }
4825 #ifndef __Panda__
4826 /* Shift forward */
4827 netfirst = netlook;
4828 #endif
4829 } while (netlook != NULL);
4830 }
4831
4832 /* got to have a primary set */
4833 if (stcb->asoc.primary_destination == 0) {
4834 stcb->asoc.primary_destination = net;
4835 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4836 (net->ro.ro_rt) &&
4837 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4838 /* No route to current primary adopt new primary */
4839 stcb->asoc.primary_destination = net;
4840 }
4841 /* Validate primary is first */
4842 net = TAILQ_FIRST(&stcb->asoc.nets);
4843 if ((net != stcb->asoc.primary_destination) &&
4844 (stcb->asoc.primary_destination)) {
4845 /* first one on the list is NOT the primary
4846 * sctp_cmpaddr() is much more efficient if
4847 * the primary is the first on the list, make it
4848 * so.
4849 */
4850 TAILQ_REMOVE(&stcb->asoc.nets,
4851 stcb->asoc.primary_destination, sctp_next);
4852 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4853 stcb->asoc.primary_destination, sctp_next);
4854 }
4855 return (0);
4856 }
4857
4858
4859 static uint32_t
4860 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4861 {
4862 uint32_t id;
4863 struct sctpasochead *head;
4864 struct sctp_tcb *lstcb;
4865
4866 SCTP_INP_WLOCK(inp);
4867 try_again:
4868 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4869 /* TSNH */
4870 SCTP_INP_WUNLOCK(inp);
4871 return (0);
4872 }
4873 /*
4874 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4875 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4876 */
4877 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4878 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4879 }
4880 id = inp->sctp_associd_counter;
4881 inp->sctp_associd_counter++;
4882 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4883 if (lstcb) {
4884 goto try_again;
4885 }
4886 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4887 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4888 stcb->asoc.in_asocid_hash = 1;
4889 SCTP_INP_WUNLOCK(inp);
4890 return id;
4891 }
4892
4893 /*
4894 * allocate an association and add it to the endpoint. The caller must be
4895 * careful to add all additional addresses once they are know right away or
4896 * else the assoc will be may experience a blackout scenario.
4897 */
4898 struct sctp_tcb *
4899 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4900 int *error, uint32_t override_tag, uint32_t vrf_id,
4901 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
4902 struct thread *p
4903 #elif defined(__Windows__)
4904 PKTHREAD p
4905 #else
4906 #if defined(__Userspace__)
4907 /* __Userspace__ NULL proc is going to be passed here. See sctp_lower_sosend */
4908 #endif
4909 struct proc *p
4910 #endif
4911 )
4912 {
4913 /* note the p argument is only valid in unbound sockets */
4914
4915 struct sctp_tcb *stcb;
4916 struct sctp_association *asoc;
4917 struct sctpasochead *head;
4918 uint16_t rport;
4919 int err;
4920
4921 /*
4922 * Assumption made here: Caller has done a
4923 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4924 * address does not exist already.
4925 */
4926 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4927 /* Hit max assoc, sorry no more */
4928 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4929 *error = ENOBUFS;
4930 return (NULL);
4931 }
4932 if (firstaddr == NULL) {
4933 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4934 *error = EINVAL;
4935 return (NULL);
4936 }
4937 SCTP_INP_RLOCK(inp);
4938 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4939 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4940 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4941 /*
4942 * If its in the TCP pool, its NOT allowed to create an
4943 * association. The parent listener needs to call
4944 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4945 * off, or connected one does this.. its an error.
4946 */
4947 SCTP_INP_RUNLOCK(inp);
4948 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4949 *error = EINVAL;
4950 return (NULL);
4951 }
4952 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4953 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4954 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4955 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4956 SCTP_INP_RUNLOCK(inp);
4957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4958 *error = EINVAL;
4959 return (NULL);
4960 }
4961 }
4962 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4963 #ifdef SCTP_DEBUG
4964 if (firstaddr) {
4965 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4966 switch (firstaddr->sa_family) {
4967 #ifdef INET
4968 case AF_INET:
4969 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4970 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4971 break;
4972 #endif
4973 #ifdef INET6
4974 case AF_INET6:
4975 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4976 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4977 break;
4978 #endif
4979 #if defined(__Userspace__)
4980 case AF_CONN:
4981 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4982 ntohs(((struct sockaddr_conn *)firstaddr)->sconn_port));
4983 break;
4984 #endif
4985 default:
4986 break;
4987 }
4988 } else {
4989 SCTPDBG(SCTP_DEBUG_PCB3,"None\n");
4990 }
4991 #endif /* SCTP_DEBUG */
4992 switch (firstaddr->sa_family) {
4993 #ifdef INET
4994 case AF_INET:
4995 {
4996 struct sockaddr_in *sin;
4997
4998 sin = (struct sockaddr_in *)firstaddr;
4999 if ((ntohs(sin->sin_port) == 0) ||
5000 (sin->sin_addr.s_addr == INADDR_ANY) ||
5001 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
5002 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
5003 /* Invalid address */
5004 SCTP_INP_RUNLOCK(inp);
5005 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5006 *error = EINVAL;
5007 return (NULL);
5008 }
5009 rport = sin->sin_port;
5010 break;
5011 }
5012 #endif
5013 #ifdef INET6
5014 case AF_INET6:
5015 {
5016 struct sockaddr_in6 *sin6;
5017
5018 sin6 = (struct sockaddr_in6 *)firstaddr;
5019 if ((ntohs(sin6->sin6_port) == 0) ||
5020 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
5021 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
5022 /* Invalid address */
5023 SCTP_INP_RUNLOCK(inp);
5024 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5025 *error = EINVAL;
5026 return (NULL);
5027 }
5028 rport = sin6->sin6_port;
5029 break;
5030 }
5031 #endif
5032 #if defined(__Userspace__)
5033 case AF_CONN:
5034 {
5035 struct sockaddr_conn *sconn;
5036
5037 sconn = (struct sockaddr_conn *)firstaddr;
5038 if ((ntohs(sconn->sconn_port) == 0) ||
5039 (sconn->sconn_addr == NULL)) {
5040 /* Invalid address */
5041 SCTP_INP_RUNLOCK(inp);
5042 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5043 *error = EINVAL;
5044 return (NULL);
5045 }
5046 rport = sconn->sconn_port;
5047 break;
5048 }
5049 #endif
5050 default:
5051 /* not supported family type */
5052 SCTP_INP_RUNLOCK(inp);
5053 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5054 *error = EINVAL;
5055 return (NULL);
5056 }
5057 SCTP_INP_RUNLOCK(inp);
5058 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
5059 /*
5060 * If you have not performed a bind, then we need to do the
5061 * ephemeral bind for you.
5062 */
5063 if ((err = sctp_inpcb_bind(inp->sctp_socket,
5064 (struct sockaddr *)NULL,
5065 (struct sctp_ifa *)NULL,
5066 #ifndef __Panda__
5067 p
5068 #else
5069 (struct proc *)NULL
5070 #endif
5071 ))) {
5072 /* bind error, probably perm */
5073 *error = err;
5074 return (NULL);
5075 }
5076 }
5077 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
5078 if (stcb == NULL) {
5079 /* out of memory? */
5080 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
5081 *error = ENOMEM;
5082 return (NULL);
5083 }
5084 SCTP_INCR_ASOC_COUNT();
5085
5086 bzero(stcb, sizeof(*stcb));
5087 asoc = &stcb->asoc;
5088
5089 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
5090 SCTP_TCB_LOCK_INIT(stcb);
5091 SCTP_TCB_SEND_LOCK_INIT(stcb);
5092 stcb->rport = rport;
5093 /* setup back pointer's */
5094 stcb->sctp_ep = inp;
5095 stcb->sctp_socket = inp->sctp_socket;
5096 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
5097 /* failed */
5098 SCTP_TCB_LOCK_DESTROY(stcb);
5099 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5100 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5101 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5102 SCTP_DECR_ASOC_COUNT();
5103 *error = err;
5104 return (NULL);
5105 }
5106 /* and the port */
5107 SCTP_INP_INFO_WLOCK();
5108 SCTP_INP_WLOCK(inp);
5109 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5110 /* inpcb freed while alloc going on */
5111 SCTP_TCB_LOCK_DESTROY(stcb);
5112 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5113 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5114 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5115 SCTP_INP_WUNLOCK(inp);
5116 SCTP_INP_INFO_WUNLOCK();
5117 SCTP_DECR_ASOC_COUNT();
5118 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5119 *error = EINVAL;
5120 return (NULL);
5121 }
5122 SCTP_TCB_LOCK(stcb);
5123
5124 /* now that my_vtag is set, add it to the hash */
5125 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
5126 /* put it in the bucket in the vtag hash of assoc's for the system */
5127 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
5128 SCTP_INP_INFO_WUNLOCK();
5129
5130 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
5131 /* failure.. memory error? */
5132 if (asoc->strmout) {
5133 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5134 asoc->strmout = NULL;
5135 }
5136 if (asoc->mapping_array) {
5137 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5138 asoc->mapping_array = NULL;
5139 }
5140 if (asoc->nr_mapping_array) {
5141 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5142 asoc->nr_mapping_array = NULL;
5143 }
5144 SCTP_DECR_ASOC_COUNT();
5145 SCTP_TCB_UNLOCK(stcb);
5146 SCTP_TCB_LOCK_DESTROY(stcb);
5147 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5148 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5149 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5150 SCTP_INP_WUNLOCK(inp);
5151 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
5152 *error = ENOBUFS;
5153 return (NULL);
5154 }
5155 /* Init all the timers */
5156 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
5157 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
5158 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
5159 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
5160 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
5161 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
5162 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
5163
5164 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
5165 /* now file the port under the hash as well */
5166 if (inp->sctp_tcbhash != NULL) {
5167 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
5168 inp->sctp_hashmark)];
5169 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
5170 }
5171 SCTP_INP_WUNLOCK(inp);
5172 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
5173 return (stcb);
5174 }
5175
5176
5177 void
5178 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
5179 {
5180 struct sctp_association *asoc;
5181
5182 asoc = &stcb->asoc;
5183 asoc->numnets--;
5184 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5185 if (net == asoc->primary_destination) {
5186 /* Reset primary */
5187 struct sctp_nets *lnet;
5188
5189 lnet = TAILQ_FIRST(&asoc->nets);
5190 /* Mobility adaptation
5191 Ideally, if deleted destination is the primary, it becomes
5192 a fast retransmission trigger by the subsequent SET PRIMARY.
5193 (by micchie)
5194 */
5195 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
5196 SCTP_MOBILITY_BASE) ||
5197 sctp_is_mobility_feature_on(stcb->sctp_ep,
5198 SCTP_MOBILITY_FASTHANDOFF)) {
5199 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
5200 if (asoc->deleted_primary != NULL) {
5201 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
5202 goto out;
5203 }
5204 asoc->deleted_primary = net;
5205 atomic_add_int(&net->ref_count, 1);
5206 memset(&net->lastsa, 0, sizeof(net->lastsa));
5207 memset(&net->lastsv, 0, sizeof(net->lastsv));
5208 sctp_mobility_feature_on(stcb->sctp_ep,
5209 SCTP_MOBILITY_PRIM_DELETED);
5210 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
5211 stcb->sctp_ep, stcb, NULL);
5212 }
5213 out:
5214 /* Try to find a confirmed primary */
5215 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
5216 }
5217 if (net == asoc->last_data_chunk_from) {
5218 /* Reset primary */
5219 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
5220 }
5221 if (net == asoc->last_control_chunk_from) {
5222 /* Clear net */
5223 asoc->last_control_chunk_from = NULL;
5224 }
5225 if (net == stcb->asoc.alternate) {
5226 sctp_free_remote_addr(stcb->asoc.alternate);
5227 stcb->asoc.alternate = NULL;
5228 }
5229 sctp_free_remote_addr(net);
5230 }
5231
5232 /*
5233 * remove a remote endpoint address from an association, it will fail if the
5234 * address does not exist.
5235 */
5236 int
5237 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
5238 {
5239 /*
5240 * Here we need to remove a remote address. This is quite simple, we
5241 * first find it in the list of address for the association
5242 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
5243 * on that item. Note we do not allow it to be removed if there are
5244 * no other addresses.
5245 */
5246 struct sctp_association *asoc;
5247 struct sctp_nets *net, *nnet;
5248
5249 asoc = &stcb->asoc;
5250
5251 /* locate the address */
5252 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5253 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
5254 continue;
5255 }
5256 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
5257 remaddr)) {
5258 /* we found the guy */
5259 if (asoc->numnets < 2) {
5260 /* Must have at LEAST two remote addresses */
5261 return (-1);
5262 } else {
5263 sctp_remove_net(stcb, net);
5264 return (0);
5265 }
5266 }
5267 }
5268 /* not found. */
5269 return (-2);
5270 }
5271
5272 void
5273 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5274 {
5275 struct sctpvtaghead *chain;
5276 struct sctp_tagblock *twait_block;
5277 int found = 0;
5278 int i;
5279
5280 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5281 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5282 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5283 if ((twait_block->vtag_block[i].v_tag == tag) &&
5284 (twait_block->vtag_block[i].lport == lport) &&
5285 (twait_block->vtag_block[i].rport == rport)) {
5286 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5287 twait_block->vtag_block[i].v_tag = 0;
5288 twait_block->vtag_block[i].lport = 0;
5289 twait_block->vtag_block[i].rport = 0;
5290 found = 1;
5291 break;
5292 }
5293 }
5294 if (found)
5295 break;
5296 }
5297 }
5298
5299 int
5300 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5301 {
5302 struct sctpvtaghead *chain;
5303 struct sctp_tagblock *twait_block;
5304 int found = 0;
5305 int i;
5306
5307 SCTP_INP_INFO_WLOCK();
5308 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5309 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5310 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5311 if ((twait_block->vtag_block[i].v_tag == tag) &&
5312 (twait_block->vtag_block[i].lport == lport) &&
5313 (twait_block->vtag_block[i].rport == rport)) {
5314 found = 1;
5315 break;
5316 }
5317 }
5318 if (found)
5319 break;
5320 }
5321 SCTP_INP_INFO_WUNLOCK();
5322 return (found);
5323 }
5324
5325
5326 void
5327 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
5328 {
5329 struct sctpvtaghead *chain;
5330 struct sctp_tagblock *twait_block;
5331 struct timeval now;
5332 int set, i;
5333
5334 if (time == 0) {
5335 /* Its disabled */
5336 return;
5337 }
5338 (void)SCTP_GETTIME_TIMEVAL(&now);
5339 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5340 set = 0;
5341 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5342 /* Block(s) present, lets find space, and expire on the fly */
5343 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5344 if ((twait_block->vtag_block[i].v_tag == 0) &&
5345 !set) {
5346 twait_block->vtag_block[i].tv_sec_at_expire =
5347 now.tv_sec + time;
5348 twait_block->vtag_block[i].v_tag = tag;
5349 twait_block->vtag_block[i].lport = lport;
5350 twait_block->vtag_block[i].rport = rport;
5351 set = 1;
5352 } else if ((twait_block->vtag_block[i].v_tag) &&
5353 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
5354 /* Audit expires this guy */
5355 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5356 twait_block->vtag_block[i].v_tag = 0;
5357 twait_block->vtag_block[i].lport = 0;
5358 twait_block->vtag_block[i].rport = 0;
5359 if (set == 0) {
5360 /* Reuse it for my new tag */
5361 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
5362 twait_block->vtag_block[i].v_tag = tag;
5363 twait_block->vtag_block[i].lport = lport;
5364 twait_block->vtag_block[i].rport = rport;
5365 set = 1;
5366 }
5367 }
5368 }
5369 if (set) {
5370 /*
5371 * We only do up to the block where we can
5372 * place our tag for audits
5373 */
5374 break;
5375 }
5376 }
5377 /* Need to add a new block to chain */
5378 if (!set) {
5379 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
5380 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
5381 if (twait_block == NULL) {
5382 #ifdef INVARIANTS
5383 panic("Can not alloc tagblock");
5384 #endif
5385 return;
5386 }
5387 memset(twait_block, 0, sizeof(struct sctp_tagblock));
5388 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
5389 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
5390 twait_block->vtag_block[0].v_tag = tag;
5391 twait_block->vtag_block[0].lport = lport;
5392 twait_block->vtag_block[0].rport = rport;
5393 }
5394 }
5395
5396
5397 #ifdef __Panda__
5398 void panda_wakeup_socket(struct socket *so);
5399 #endif
5400
5401 /*-
5402 * Free the association after un-hashing the remote port. This
5403 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
5404 * expect that the input to this function IS a locked TCB.
5405 * It will return 0, if it did NOT destroy the association (instead
5406 * it unlocks it. It will return NON-zero if it either destroyed the
5407 * association OR the association is already destroyed.
5408 */
5409 int
5410 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
5411 {
5412 int i;
5413 struct sctp_association *asoc;
5414 struct sctp_nets *net, *nnet;
5415 struct sctp_laddr *laddr, *naddr;
5416 struct sctp_tmit_chunk *chk, *nchk;
5417 struct sctp_asconf_addr *aparam, *naparam;
5418 struct sctp_asconf_ack *aack, *naack;
5419 struct sctp_stream_reset_list *strrst, *nstrrst;
5420 struct sctp_queued_to_read *sq, *nsq;
5421 struct sctp_stream_queue_pending *sp, *nsp;
5422 sctp_sharedkey_t *shared_key, *nshared_key;
5423 struct socket *so;
5424
5425 /* first, lets purge the entry from the hash table. */
5426 #if defined(__APPLE__)
5427 sctp_lock_assert(SCTP_INP_SO(inp));
5428 #endif
5429
5430 #ifdef SCTP_LOG_CLOSING
5431 sctp_log_closing(inp, stcb, 6);
5432 #endif
5433 if (stcb->asoc.state == 0) {
5434 #ifdef SCTP_LOG_CLOSING
5435 sctp_log_closing(inp, NULL, 7);
5436 #endif
5437 /* there is no asoc, really TSNH :-0 */
5438 return (1);
5439 }
5440 if (stcb->asoc.alternate) {
5441 sctp_free_remote_addr(stcb->asoc.alternate);
5442 stcb->asoc.alternate = NULL;
5443 }
5444 #if !defined(__APPLE__) /* TEMP: moved to below */
5445 /* TEMP CODE */
5446 if (stcb->freed_from_where == 0) {
5447 /* Only record the first place free happened from */
5448 stcb->freed_from_where = from_location;
5449 }
5450 /* TEMP CODE */
5451 #endif
5452
5453 asoc = &stcb->asoc;
5454 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5455 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5456 /* nothing around */
5457 so = NULL;
5458 else
5459 so = inp->sctp_socket;
5460
5461 /*
5462 * We used timer based freeing if a reader or writer is in the way.
5463 * So we first check if we are actually being called from a timer,
5464 * if so we abort early if a reader or writer is still in the way.
5465 */
5466 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
5467 (from_inpcbfree == SCTP_NORMAL_PROC)) {
5468 /*
5469 * is it the timer driving us? if so are the reader/writers
5470 * gone?
5471 */
5472 if (stcb->asoc.refcnt) {
5473 /* nope, reader or writer in the way */
5474 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5475 /* no asoc destroyed */
5476 SCTP_TCB_UNLOCK(stcb);
5477 #ifdef SCTP_LOG_CLOSING
5478 sctp_log_closing(inp, stcb, 8);
5479 #endif
5480 return (0);
5481 }
5482 }
5483 /* now clean up any other timers */
5484 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5485 asoc->dack_timer.self = NULL;
5486 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5487 /*-
5488 * For stream reset we don't blast this unless
5489 * it is a str-reset timer, it might be the
5490 * free-asoc timer which we DON'T want to
5491 * disturb.
5492 */
5493 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
5494 asoc->strreset_timer.self = NULL;
5495 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5496 asoc->asconf_timer.self = NULL;
5497 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5498 asoc->autoclose_timer.self = NULL;
5499 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5500 asoc->shut_guard_timer.self = NULL;
5501 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5502 asoc->delayed_event_timer.self = NULL;
5503 /* Mobility adaptation */
5504 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
5505 asoc->delete_prim_timer.self = NULL;
5506 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5507 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5508 net->rxt_timer.self = NULL;
5509 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5510 net->pmtu_timer.self = NULL;
5511 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5512 net->hb_timer.self = NULL;
5513 }
5514 /* Now the read queue needs to be cleaned up (only once) */
5515 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
5516 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
5517 SCTP_INP_READ_LOCK(inp);
5518 TAILQ_FOREACH(sq, &inp->read_queue, next) {
5519 if (sq->stcb == stcb) {
5520 sq->do_not_ref_stcb = 1;
5521 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
5522 /* If there is no end, there never
5523 * will be now.
5524 */
5525 if (sq->end_added == 0) {
5526 /* Held for PD-API clear that. */
5527 sq->pdapi_aborted = 1;
5528 sq->held_length = 0;
5529 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
5530 /*
5531 * Need to add a PD-API aborted indication.
5532 * Setting the control_pdapi assures that it will
5533 * be added right after this msg.
5534 */
5535 uint32_t strseq;
5536 stcb->asoc.control_pdapi = sq;
5537 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
5538 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
5539 stcb,
5540 SCTP_PARTIAL_DELIVERY_ABORTED,
5541 (void *)&strseq,
5542 SCTP_SO_LOCKED);
5543 stcb->asoc.control_pdapi = NULL;
5544 }
5545 }
5546 /* Add an end to wake them */
5547 sq->end_added = 1;
5548 }
5549 }
5550 SCTP_INP_READ_UNLOCK(inp);
5551 if (stcb->block_entry) {
5552 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
5553 stcb->block_entry->error = ECONNRESET;
5554 stcb->block_entry = NULL;
5555 }
5556 }
5557 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
5558 /* Someone holds a reference OR the socket is unaccepted yet.
5559 */
5560 if ((stcb->asoc.refcnt) ||
5561 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5562 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
5563 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
5564 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5565 }
5566 SCTP_TCB_UNLOCK(stcb);
5567 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5568 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5569 /* nothing around */
5570 so = NULL;
5571 if (so) {
5572 /* Wake any reader/writers */
5573 sctp_sorwakeup(inp, so);
5574 sctp_sowwakeup(inp, so);
5575 }
5576
5577 #ifdef SCTP_LOG_CLOSING
5578 sctp_log_closing(inp, stcb, 9);
5579 #endif
5580 /* no asoc destroyed */
5581 return (0);
5582 }
5583 #ifdef SCTP_LOG_CLOSING
5584 sctp_log_closing(inp, stcb, 10);
5585 #endif
5586 /* When I reach here, no others want
5587 * to kill the assoc yet.. and I own
5588 * the lock. Now its possible an abort
5589 * comes in when I do the lock exchange
5590 * below to grab all the locks to do
5591 * the final take out. to prevent this
5592 * we increment the count, which will
5593 * start a timer and blow out above thus
5594 * assuring us that we hold exclusive
5595 * killing of the asoc. Note that
5596 * after getting back the TCB lock
5597 * we will go ahead and increment the
5598 * counter back up and stop any timer
5599 * a passing stranger may have started :-S
5600 */
5601 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5602 atomic_add_int(&stcb->asoc.refcnt, 1);
5603
5604 SCTP_TCB_UNLOCK(stcb);
5605 SCTP_INP_INFO_WLOCK();
5606 SCTP_INP_WLOCK(inp);
5607 SCTP_TCB_LOCK(stcb);
5608 }
5609 /* Double check the GONE flag */
5610 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5611 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5612 /* nothing around */
5613 so = NULL;
5614
5615 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
5616 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
5617 /*
5618 * For TCP type we need special handling when we are
5619 * connected. We also include the peel'ed off ones to.
5620 */
5621 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
5622 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
5623 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
5624 if (so) {
5625 SOCK_LOCK(so);
5626 if (so->so_rcv.sb_cc == 0) {
5627 so->so_state &= ~(SS_ISCONNECTING |
5628 SS_ISDISCONNECTING |
5629 SS_ISCONFIRMING |
5630 SS_ISCONNECTED);
5631 }
5632 #if defined(__APPLE__)
5633 socantrcvmore(so);
5634 #else
5635 socantrcvmore_locked(so);
5636 #endif
5637 sctp_sowwakeup(inp, so);
5638 sctp_sorwakeup(inp, so);
5639 SCTP_SOWAKEUP(so);
5640 }
5641 }
5642 }
5643
5644 /* Make it invalid too, that way if its
5645 * about to run it will abort and return.
5646 */
5647 /* re-increment the lock */
5648 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5649 atomic_add_int(&stcb->asoc.refcnt, -1);
5650 }
5651 if (stcb->asoc.refcnt) {
5652 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
5653 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5654 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5655 SCTP_INP_INFO_WUNLOCK();
5656 SCTP_INP_WUNLOCK(inp);
5657 }
5658 SCTP_TCB_UNLOCK(stcb);
5659 return (0);
5660 }
5661 asoc->state = 0;
5662 if (inp->sctp_tcbhash) {
5663 LIST_REMOVE(stcb, sctp_tcbhash);
5664 }
5665 if (stcb->asoc.in_asocid_hash) {
5666 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5667 }
5668 /* Now lets remove it from the list of ALL associations in the EP */
5669 LIST_REMOVE(stcb, sctp_tcblist);
5670 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5671 SCTP_INP_INCR_REF(inp);
5672 SCTP_INP_WUNLOCK(inp);
5673 }
5674 /* pull from vtag hash */
5675 LIST_REMOVE(stcb, sctp_asocs);
5676 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
5677 inp->sctp_lport, stcb->rport);
5678
5679 /* Now restop the timers to be sure
5680 * this is paranoia at is finest!
5681 */
5682 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5683 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5684 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5685 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5686 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5687 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5688 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5689 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5690 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5691 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5692 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5693 }
5694
5695 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
5696 /*
5697 * The chunk lists and such SHOULD be empty but we check them just
5698 * in case.
5699 */
5700 /* anything on the wheel needs to be removed */
5701 for (i = 0; i < asoc->streamoutcnt; i++) {
5702 struct sctp_stream_out *outs;
5703
5704 outs = &asoc->strmout[i];
5705 /* now clean up any chunks here */
5706 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5707 TAILQ_REMOVE(&outs->outqueue, sp, next);
5708 sctp_free_spbufspace(stcb, asoc, sp);
5709 if (sp->data) {
5710 if (so) {
5711 /* Still an open socket - report */
5712 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5713 0, (void *)sp, SCTP_SO_LOCKED);
5714 }
5715 if (sp->data) {
5716 sctp_m_freem(sp->data);
5717 sp->data = NULL;
5718 sp->tail_mbuf = NULL;
5719 sp->length = 0;
5720 }
5721 }
5722 if (sp->net) {
5723 sctp_free_remote_addr(sp->net);
5724 sp->net = NULL;
5725 }
5726 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5727 }
5728 }
5729 /*sa_ignore FREED_MEMORY*/
5730 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5731 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5732 SCTP_FREE(strrst, SCTP_M_STRESET);
5733 }
5734 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5735 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5736 if (sq->data) {
5737 sctp_m_freem(sq->data);
5738 sq->data = NULL;
5739 }
5740 sctp_free_remote_addr(sq->whoFrom);
5741 sq->whoFrom = NULL;
5742 sq->stcb = NULL;
5743 /* Free the ctl entry */
5744 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5745 SCTP_DECR_READQ_COUNT();
5746 /*sa_ignore FREED_MEMORY*/
5747 }
5748 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5749 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5750 if (chk->data) {
5751 sctp_m_freem(chk->data);
5752 chk->data = NULL;
5753 }
5754 if (chk->holds_key_ref)
5755 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5756 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5757 SCTP_DECR_CHK_COUNT();
5758 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5759 asoc->free_chunk_cnt--;
5760 /*sa_ignore FREED_MEMORY*/
5761 }
5762 /* pending send queue SHOULD be empty */
5763 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5764 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5765 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5766 #ifdef INVARIANTS
5767 } else {
5768 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5769 #endif
5770 }
5771 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5772 if (chk->data) {
5773 if (so) {
5774 /* Still a socket? */
5775 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5776 0, chk, SCTP_SO_LOCKED);
5777 }
5778 if (chk->data) {
5779 sctp_m_freem(chk->data);
5780 chk->data = NULL;
5781 }
5782 }
5783 if (chk->holds_key_ref)
5784 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5785 if (chk->whoTo) {
5786 sctp_free_remote_addr(chk->whoTo);
5787 chk->whoTo = NULL;
5788 }
5789 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5790 SCTP_DECR_CHK_COUNT();
5791 /*sa_ignore FREED_MEMORY*/
5792 }
5793 /* sent queue SHOULD be empty */
5794 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5795 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5796 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5797 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5798 #ifdef INVARIANTS
5799 } else {
5800 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5801 #endif
5802 }
5803 }
5804 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5805 if (chk->data) {
5806 if (so) {
5807 /* Still a socket? */
5808 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5809 0, chk, SCTP_SO_LOCKED);
5810 }
5811 if (chk->data) {
5812 sctp_m_freem(chk->data);
5813 chk->data = NULL;
5814 }
5815 }
5816 if (chk->holds_key_ref)
5817 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5818 sctp_free_remote_addr(chk->whoTo);
5819 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5820 SCTP_DECR_CHK_COUNT();
5821 /*sa_ignore FREED_MEMORY*/
5822 }
5823 #ifdef INVARIANTS
5824 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5825 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5826 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5827 }
5828 }
5829 #endif
5830 /* control queue MAY not be empty */
5831 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5832 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5833 if (chk->data) {
5834 sctp_m_freem(chk->data);
5835 chk->data = NULL;
5836 }
5837 if (chk->holds_key_ref)
5838 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5839 sctp_free_remote_addr(chk->whoTo);
5840 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5841 SCTP_DECR_CHK_COUNT();
5842 /*sa_ignore FREED_MEMORY*/
5843 }
5844 /* ASCONF queue MAY not be empty */
5845 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5846 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5847 if (chk->data) {
5848 sctp_m_freem(chk->data);
5849 chk->data = NULL;
5850 }
5851 if (chk->holds_key_ref)
5852 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5853 sctp_free_remote_addr(chk->whoTo);
5854 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5855 SCTP_DECR_CHK_COUNT();
5856 /*sa_ignore FREED_MEMORY*/
5857 }
5858 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5859 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5860 if (chk->data) {
5861 sctp_m_freem(chk->data);
5862 chk->data = NULL;
5863 }
5864 if (chk->holds_key_ref)
5865 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5866 sctp_free_remote_addr(chk->whoTo);
5867 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5868 SCTP_DECR_CHK_COUNT();
5869 /*sa_ignore FREED_MEMORY*/
5870 }
5871
5872 if (asoc->mapping_array) {
5873 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5874 asoc->mapping_array = NULL;
5875 }
5876 if (asoc->nr_mapping_array) {
5877 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5878 asoc->nr_mapping_array = NULL;
5879 }
5880 /* the stream outs */
5881 if (asoc->strmout) {
5882 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5883 asoc->strmout = NULL;
5884 }
5885 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5886 if (asoc->strmin) {
5887 struct sctp_queued_to_read *ctl, *nctl;
5888
5889 for (i = 0; i < asoc->streamincnt; i++) {
5890 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5891 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5892 sctp_free_remote_addr(ctl->whoFrom);
5893 if (ctl->data) {
5894 sctp_m_freem(ctl->data);
5895 ctl->data = NULL;
5896 }
5897 /*
5898 * We don't free the address here
5899 * since all the net's were freed
5900 * above.
5901 */
5902 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5903 SCTP_DECR_READQ_COUNT();
5904 }
5905 }
5906 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5907 asoc->strmin = NULL;
5908 }
5909 asoc->streamincnt = 0;
5910 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5911 #ifdef INVARIANTS
5912 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5913 panic("no net's left alloc'ed, or list points to itself");
5914 }
5915 #endif
5916 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5917 sctp_free_remote_addr(net);
5918 }
5919 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5920 /*sa_ignore FREED_MEMORY*/
5921 sctp_remove_laddr(laddr);
5922 }
5923
5924 /* pending asconf (address) parameters */
5925 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5926 /*sa_ignore FREED_MEMORY*/
5927 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5928 SCTP_FREE(aparam,SCTP_M_ASC_ADDR);
5929 }
5930 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5931 /*sa_ignore FREED_MEMORY*/
5932 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5933 if (aack->data != NULL) {
5934 sctp_m_freem(aack->data);
5935 }
5936 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5937 }
5938 /* clean up auth stuff */
5939 if (asoc->local_hmacs)
5940 sctp_free_hmaclist(asoc->local_hmacs);
5941 if (asoc->peer_hmacs)
5942 sctp_free_hmaclist(asoc->peer_hmacs);
5943
5944 if (asoc->local_auth_chunks)
5945 sctp_free_chunklist(asoc->local_auth_chunks);
5946 if (asoc->peer_auth_chunks)
5947 sctp_free_chunklist(asoc->peer_auth_chunks);
5948
5949 sctp_free_authinfo(&asoc->authinfo);
5950
5951 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5952 LIST_REMOVE(shared_key, next);
5953 sctp_free_sharedkey(shared_key);
5954 /*sa_ignore FREED_MEMORY*/
5955 }
5956
5957 /* Insert new items here :> */
5958
5959 /* Get rid of LOCK */
5960 SCTP_TCB_UNLOCK(stcb);
5961 SCTP_TCB_LOCK_DESTROY(stcb);
5962 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5963 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5964 SCTP_INP_INFO_WUNLOCK();
5965 SCTP_INP_RLOCK(inp);
5966 }
5967 #if defined(__APPLE__) /* TEMP CODE */
5968 stcb->freed_from_where = from_location;
5969 #endif
5970 #ifdef SCTP_TRACK_FREED_ASOCS
5971 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5972 /* now clean up the tasoc itself */
5973 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5974 SCTP_DECR_ASOC_COUNT();
5975 } else {
5976 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5977 }
5978 #else
5979 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5980 SCTP_DECR_ASOC_COUNT();
5981 #endif
5982 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5983 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5984 /* If its NOT the inp_free calling us AND
5985 * sctp_close as been called, we
5986 * call back...
5987 */
5988 SCTP_INP_RUNLOCK(inp);
5989 /* This will start the kill timer (if we are
5990 * the last one) since we hold an increment yet. But
5991 * this is the only safe way to do this
5992 * since otherwise if the socket closes
5993 * at the same time we are here we might
5994 * collide in the cleanup.
5995 */
5996 sctp_inpcb_free(inp,
5997 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5998 SCTP_CALLED_DIRECTLY_NOCMPSET);
5999 SCTP_INP_DECR_REF(inp);
6000 goto out_of;
6001 } else {
6002 /* The socket is still open. */
6003 SCTP_INP_DECR_REF(inp);
6004 }
6005 }
6006 if (from_inpcbfree == SCTP_NORMAL_PROC) {
6007 SCTP_INP_RUNLOCK(inp);
6008 }
6009 out_of:
6010 /* destroyed the asoc */
6011 #ifdef SCTP_LOG_CLOSING
6012 sctp_log_closing(inp, NULL, 11);
6013 #endif
6014 return (1);
6015 }
6016
6017
6018
6019 /*
6020 * determine if a destination is "reachable" based upon the addresses bound
6021 * to the current endpoint (e.g. only v4 or v6 currently bound)
6022 */
6023 /*
6024 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
6025 * assoc level v4/v6 flags, as the assoc *may* not have the same address
6026 * types bound as its endpoint
6027 */
6028 int
6029 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
6030 {
6031 struct sctp_inpcb *inp;
6032 int answer;
6033
6034 /*
6035 * No locks here, the TCB, in all cases is already locked and an
6036 * assoc is up. There is either a INP lock by the caller applied (in
6037 * asconf case when deleting an address) or NOT in the HB case,
6038 * however if HB then the INP increment is up and the INP will not
6039 * be removed (on top of the fact that we have a TCB lock). So we
6040 * only want to read the sctp_flags, which is either bound-all or
6041 * not.. no protection needed since once an assoc is up you can't be
6042 * changing your binding.
6043 */
6044 inp = stcb->sctp_ep;
6045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6046 /* if bound all, destination is not restricted */
6047 /*
6048 * RRS: Question during lock work: Is this correct? If you
6049 * are bound-all you still might need to obey the V4--V6
6050 * flags??? IMO this bound-all stuff needs to be removed!
6051 */
6052 return (1);
6053 }
6054 /* NOTE: all "scope" checks are done when local addresses are added */
6055 switch (destaddr->sa_family) {
6056 #ifdef INET6
6057 case AF_INET6:
6058 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6059 answer = inp->inp_vflag & INP_IPV6;
6060 #else
6061 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
6062 #endif
6063 break;
6064 #endif
6065 #ifdef INET
6066 case AF_INET:
6067 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6068 answer = inp->inp_vflag & INP_IPV4;
6069 #else
6070 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
6071 #endif
6072 break;
6073 #endif
6074 #if defined(__Userspace__)
6075 case AF_CONN:
6076 answer = inp->ip_inp.inp.inp_vflag & INP_CONN;
6077 break;
6078 #endif
6079 default:
6080 /* invalid family, so it's unreachable */
6081 answer = 0;
6082 break;
6083 }
6084 return (answer);
6085 }
6086
6087 /*
6088 * update the inp_vflags on an endpoint
6089 */
6090 static void
6091 sctp_update_ep_vflag(struct sctp_inpcb *inp)
6092 {
6093 struct sctp_laddr *laddr;
6094
6095 /* first clear the flag */
6096 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6097 inp->inp_vflag = 0;
6098 #else
6099 inp->ip_inp.inp.inp_vflag = 0;
6100 #endif
6101 /* set the flag based on addresses on the ep list */
6102 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6103 if (laddr->ifa == NULL) {
6104 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
6105 __FUNCTION__);
6106 continue;
6107 }
6108
6109 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
6110 continue;
6111 }
6112 switch (laddr->ifa->address.sa.sa_family) {
6113 #ifdef INET6
6114 case AF_INET6:
6115 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6116 inp->inp_vflag |= INP_IPV6;
6117 #else
6118 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6119 #endif
6120 break;
6121 #endif
6122 #ifdef INET
6123 case AF_INET:
6124 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6125 inp->inp_vflag |= INP_IPV4;
6126 #else
6127 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6128 #endif
6129 break;
6130 #endif
6131 #if defined(__Userspace__)
6132 case AF_CONN:
6133 inp->ip_inp.inp.inp_vflag |= INP_CONN;
6134 break;
6135 #endif
6136 default:
6137 break;
6138 }
6139 }
6140 }
6141
6142 /*
6143 * Add the address to the endpoint local address list There is nothing to be
6144 * done if we are bound to all addresses
6145 */
6146 void
6147 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
6148 {
6149 struct sctp_laddr *laddr;
6150 int fnd, error = 0;
6151
6152 fnd = 0;
6153
6154 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6155 /* You are already bound to all. You have it already */
6156 return;
6157 }
6158 #ifdef INET6
6159 if (ifa->address.sa.sa_family == AF_INET6) {
6160 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6161 /* Can't bind a non-useable addr. */
6162 return;
6163 }
6164 }
6165 #endif
6166 /* first, is it already present? */
6167 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6168 if (laddr->ifa == ifa) {
6169 fnd = 1;
6170 break;
6171 }
6172 }
6173
6174 if (fnd == 0) {
6175 /* Not in the ep list */
6176 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
6177 if (error != 0)
6178 return;
6179 inp->laddr_count++;
6180 /* update inp_vflag flags */
6181 switch (ifa->address.sa.sa_family) {
6182 #ifdef INET6
6183 case AF_INET6:
6184 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6185 inp->inp_vflag |= INP_IPV6;
6186 #else
6187 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6188 #endif
6189 break;
6190 #endif
6191 #ifdef INET
6192 case AF_INET:
6193 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6194 inp->inp_vflag |= INP_IPV4;
6195 #else
6196 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6197 #endif
6198 break;
6199 #endif
6200 #if defined(__Userspace__)
6201 case AF_CONN:
6202 inp->ip_inp.inp.inp_vflag |= INP_CONN;
6203 break;
6204 #endif
6205 default:
6206 break;
6207 }
6208 }
6209 return;
6210 }
6211
6212
6213 /*
6214 * select a new (hopefully reachable) destination net (should only be used
6215 * when we deleted an ep addr that is the only usable source address to reach
6216 * the destination net)
6217 */
6218 static void
6219 sctp_select_primary_destination(struct sctp_tcb *stcb)
6220 {
6221 struct sctp_nets *net;
6222
6223 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6224 /* for now, we'll just pick the first reachable one we find */
6225 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
6226 continue;
6227 if (sctp_destination_is_reachable(stcb,
6228 (struct sockaddr *)&net->ro._l_addr)) {
6229 /* found a reachable destination */
6230 stcb->asoc.primary_destination = net;
6231 }
6232 }
6233 /* I can't there from here! ...we're gonna die shortly... */
6234 }
6235
6236
6237 /*
6238 * Delete the address from the endpoint local address list There is nothing
6239 * to be done if we are bound to all addresses
6240 */
6241 void
6242 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
6243 {
6244 struct sctp_laddr *laddr;
6245 int fnd;
6246
6247 fnd = 0;
6248 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6249 /* You are already bound to all. You have it already */
6250 return;
6251 }
6252 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6253 if (laddr->ifa == ifa) {
6254 fnd = 1;
6255 break;
6256 }
6257 }
6258 if (fnd && (inp->laddr_count < 2)) {
6259 /* can't delete unless there are at LEAST 2 addresses */
6260 return;
6261 }
6262 if (fnd) {
6263 /*
6264 * clean up any use of this address go through our
6265 * associations and clear any last_used_address that match
6266 * this one for each assoc, see if a new primary_destination
6267 * is needed
6268 */
6269 struct sctp_tcb *stcb;
6270
6271 /* clean up "next_addr_touse" */
6272 if (inp->next_addr_touse == laddr)
6273 /* delete this address */
6274 inp->next_addr_touse = NULL;
6275
6276 /* clean up "last_used_address" */
6277 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6278 struct sctp_nets *net;
6279 SCTP_TCB_LOCK(stcb);
6280 if (stcb->asoc.last_used_address == laddr)
6281 /* delete this address */
6282 stcb->asoc.last_used_address = NULL;
6283 /* Now spin through all the nets and purge any ref to laddr */
6284 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6285 if (net->ro._s_addr &&
6286 (net->ro._s_addr->ifa == laddr->ifa)) {
6287 /* Yep, purge src address selected */
6288 sctp_rtentry_t *rt;
6289
6290 /* delete this address if cached */
6291 rt = net->ro.ro_rt;
6292 if (rt != NULL) {
6293 RTFREE(rt);
6294 net->ro.ro_rt = NULL;
6295 }
6296 sctp_free_ifa(net->ro._s_addr);
6297 net->ro._s_addr = NULL;
6298 net->src_addr_selected = 0;
6299 }
6300 }
6301 SCTP_TCB_UNLOCK(stcb);
6302 } /* for each tcb */
6303 /* remove it from the ep list */
6304 sctp_remove_laddr(laddr);
6305 inp->laddr_count--;
6306 /* update inp_vflag flags */
6307 sctp_update_ep_vflag(inp);
6308 }
6309 return;
6310 }
6311
6312 /*
6313 * Add the address to the TCB local address restricted list.
6314 * This is a "pending" address list (eg. addresses waiting for an
6315 * ASCONF-ACK response) and cannot be used as a valid source address.
6316 */
6317 void
6318 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6319 {
6320 struct sctp_laddr *laddr;
6321 struct sctpladdr *list;
6322
6323 /*
6324 * Assumes TCB is locked.. and possibly the INP. May need to
6325 * confirm/fix that if we need it and is not the case.
6326 */
6327 list = &stcb->asoc.sctp_restricted_addrs;
6328
6329 #ifdef INET6
6330 if (ifa->address.sa.sa_family == AF_INET6) {
6331 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6332 /* Can't bind a non-existent addr. */
6333 return;
6334 }
6335 }
6336 #endif
6337 /* does the address already exist? */
6338 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
6339 if (laddr->ifa == ifa) {
6340 return;
6341 }
6342 }
6343
6344 /* add to the list */
6345 (void)sctp_insert_laddr(list, ifa, 0);
6346 return;
6347 }
6348
6349 /*
6350 * insert an laddr entry with the given ifa for the desired list
6351 */
6352 int
6353 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
6354 {
6355 struct sctp_laddr *laddr;
6356
6357 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
6358 if (laddr == NULL) {
6359 /* out of memory? */
6360 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
6361 return (EINVAL);
6362 }
6363 SCTP_INCR_LADDR_COUNT();
6364 bzero(laddr, sizeof(*laddr));
6365 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
6366 laddr->ifa = ifa;
6367 laddr->action = act;
6368 atomic_add_int(&ifa->refcount, 1);
6369 /* insert it */
6370 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
6371
6372 return (0);
6373 }
6374
6375 /*
6376 * Remove an laddr entry from the local address list (on an assoc)
6377 */
6378 void
6379 sctp_remove_laddr(struct sctp_laddr *laddr)
6380 {
6381
6382 /* remove from the list */
6383 LIST_REMOVE(laddr, sctp_nxt_addr);
6384 sctp_free_ifa(laddr->ifa);
6385 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
6386 SCTP_DECR_LADDR_COUNT();
6387 }
6388
6389 /*
6390 * Remove a local address from the TCB local address restricted list
6391 */
6392 void
6393 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6394 {
6395 struct sctp_inpcb *inp;
6396 struct sctp_laddr *laddr;
6397
6398 /*
6399 * This is called by asconf work. It is assumed that a) The TCB is
6400 * locked and b) The INP is locked. This is true in as much as I can
6401 * trace through the entry asconf code where I did these locks.
6402 * Again, the ASCONF code is a bit different in that it does lock
6403 * the INP during its work often times. This must be since we don't
6404 * want other proc's looking up things while what they are looking
6405 * up is changing :-D
6406 */
6407
6408 inp = stcb->sctp_ep;
6409 /* if subset bound and don't allow ASCONF's, can't delete last */
6410 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
6411 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
6412 if (stcb->sctp_ep->laddr_count < 2) {
6413 /* can't delete last address */
6414 return;
6415 }
6416 }
6417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
6418 /* remove the address if it exists */
6419 if (laddr->ifa == NULL)
6420 continue;
6421 if (laddr->ifa == ifa) {
6422 sctp_remove_laddr(laddr);
6423 return;
6424 }
6425 }
6426
6427 /* address not found! */
6428 return;
6429 }
6430
6431 #if defined(__FreeBSD__)
6432 /*
6433 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
6434 */
6435 /* sysctl */
6436 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
6437 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
6438 #endif /* FreeBSD || APPLE */
6439
6440
6441
6442 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6443 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
6444 int *sctp_cpuarry = NULL;
6445 void
6446 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
6447 {
6448 /* Queue a packet to a processor for the specified core */
6449 struct sctp_mcore_queue *qent;
6450 struct sctp_mcore_ctrl *wkq;
6451 int need_wake = 0;
6452 if (sctp_mcore_workers == NULL) {
6453 /* Something went way bad during setup */
6454 sctp_input_with_port(m, off, 0);
6455 return;
6456 }
6457 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
6458 (sizeof(struct sctp_mcore_queue)),
6459 SCTP_M_MCORE);
6460 if (qent == NULL) {
6461 /* This is trouble */
6462 sctp_input_with_port(m, off, 0);
6463 return;
6464 }
6465 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6466 qent->vn = curvnet;
6467 #endif
6468 qent->m = m;
6469 qent->off = off;
6470 qent->v6 = 0;
6471 wkq = &sctp_mcore_workers[cpu_to_use];
6472 SCTP_MCORE_QLOCK(wkq);
6473
6474 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
6475 if (wkq->running == 0) {
6476 need_wake = 1;
6477 }
6478 SCTP_MCORE_QUNLOCK(wkq);
6479 if (need_wake) {
6480 wakeup(&wkq->running);
6481 }
6482 }
6483
6484 static void
6485 sctp_mcore_thread(void *arg)
6486 {
6487
6488 struct sctp_mcore_ctrl *wkq;
6489 struct sctp_mcore_queue *qent;
6490
6491 wkq = (struct sctp_mcore_ctrl *)arg;
6492 struct mbuf *m;
6493 int off, v6;
6494
6495 /* Wait for first tickle */
6496 SCTP_MCORE_LOCK(wkq);
6497 wkq->running = 0;
6498 msleep(&wkq->running,
6499 &wkq->core_mtx,
6500 0, "wait for pkt", 0);
6501 SCTP_MCORE_UNLOCK(wkq);
6502
6503 /* Bind to our cpu */
6504 thread_lock(curthread);
6505 sched_bind(curthread, wkq->cpuid);
6506 thread_unlock(curthread);
6507
6508 /* Now lets start working */
6509 SCTP_MCORE_LOCK(wkq);
6510 /* Now grab lock and go */
6511 for (;;) {
6512 SCTP_MCORE_QLOCK(wkq);
6513 skip_sleep:
6514 wkq->running = 1;
6515 qent = TAILQ_FIRST(&wkq->que);
6516 if (qent) {
6517 TAILQ_REMOVE(&wkq->que, qent, next);
6518 SCTP_MCORE_QUNLOCK(wkq);
6519 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6520 CURVNET_SET(qent->vn);
6521 #endif
6522 m = qent->m;
6523 off = qent->off;
6524 v6 = qent->v6;
6525 SCTP_FREE(qent, SCTP_M_MCORE);
6526 if (v6 == 0) {
6527 sctp_input_with_port(m, off, 0);
6528 } else {
6529 SCTP_PRINTF("V6 not yet supported\n");
6530 sctp_m_freem(m);
6531 }
6532 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6533 CURVNET_RESTORE();
6534 #endif
6535 SCTP_MCORE_QLOCK(wkq);
6536 }
6537 wkq->running = 0;
6538 if (!TAILQ_EMPTY(&wkq->que)) {
6539 goto skip_sleep;
6540 }
6541 SCTP_MCORE_QUNLOCK(wkq);
6542 msleep(&wkq->running,
6543 &wkq->core_mtx,
6544 0, "wait for pkt", 0);
6545 }
6546 }
6547
6548 static void
6549 sctp_startup_mcore_threads(void)
6550 {
6551 int i, cpu;
6552
6553 if (mp_ncpus == 1)
6554 return;
6555
6556 if (sctp_mcore_workers != NULL) {
6557 /* Already been here in some previous
6558 * vnet?
6559 */
6560 return;
6561 }
6562 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
6563 ((mp_maxid+1) * sizeof(struct sctp_mcore_ctrl)),
6564 SCTP_M_MCORE);
6565 if (sctp_mcore_workers == NULL) {
6566 /* TSNH I hope */
6567 return;
6568 }
6569 memset(sctp_mcore_workers, 0 , ((mp_maxid+1) *
6570 sizeof(struct sctp_mcore_ctrl)));
6571 /* Init the structures */
6572 for (i = 0; i<=mp_maxid; i++) {
6573 TAILQ_INIT(&sctp_mcore_workers[i].que);
6574 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
6575 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
6576 sctp_mcore_workers[i].cpuid = i;
6577 }
6578 if (sctp_cpuarry == NULL) {
6579 SCTP_MALLOC(sctp_cpuarry, int *,
6580 (mp_ncpus * sizeof(int)),
6581 SCTP_M_MCORE);
6582 i = 0;
6583 CPU_FOREACH(cpu) {
6584 sctp_cpuarry[i] = cpu;
6585 i++;
6586 }
6587 }
6588
6589 /* Now start them all */
6590 CPU_FOREACH(cpu) {
6591 #if __FreeBSD_version <= 701000
6592 (void)kthread_create(sctp_mcore_thread,
6593 (void *)&sctp_mcore_workers[cpu],
6594 &sctp_mcore_workers[cpu].thread_proc,
6595 RFPROC,
6596 SCTP_KTHREAD_PAGES,
6597 SCTP_MCORE_NAME);
6598
6599 #else
6600 (void)kproc_create(sctp_mcore_thread,
6601 (void *)&sctp_mcore_workers[cpu],
6602 &sctp_mcore_workers[cpu].thread_proc,
6603 RFPROC,
6604 SCTP_KTHREAD_PAGES,
6605 SCTP_MCORE_NAME);
6606 #endif
6607
6608 }
6609 }
6610 #endif
6611 #if defined(__FreeBSD__) && __FreeBSD_cc_version >= 1200000
6612 static struct mbuf *
6613 sctp_netisr_hdlr(struct mbuf *m, uintptr_t source)
6614 {
6615 struct ip *ip;
6616 struct sctphdr *sh;
6617 int offset;
6618 uint32_t flowid, tag;
6619
6620 /*
6621 * No flow id built by lower layers fix it so we
6622 * create one.
6623 */
6624 ip = mtod(m, struct ip *);
6625 offset = (ip->ip_hl << 2) + sizeof(struct sctphdr);
6626 if (SCTP_BUF_LEN(m) < offset) {
6627 if ((m = m_pullup(m, offset)) == NULL) {
6628 SCTP_STAT_INCR(sctps_hdrops);
6629 return (NULL);
6630 }
6631 ip = mtod(m, struct ip *);
6632 }
6633 sh = (struct sctphdr *)((caddr_t)ip + (ip->ip_hl << 2));
6634 tag = htonl(sh->v_tag);
6635 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6636 m->m_pkthdr.flowid = flowid;
6637 m->m_flags |= M_FLOWID;
6638 return (m);
6639 }
6640 #endif
6641
6642 void
6643 sctp_pcb_init()
6644 {
6645 /*
6646 * SCTP initialization for the PCB structures should be called by
6647 * the sctp_init() funciton.
6648 */
6649 int i;
6650 struct timeval tv;
6651
6652 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
6653 /* error I was called twice */
6654 return;
6655 }
6656 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
6657
6658 #if defined(SCTP_LOCAL_TRACE_BUF)
6659 #if defined(__Windows__)
6660 if (SCTP_BASE_SYSCTL(sctp_log) != NULL) {
6661 bzero(SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
6662 }
6663 #else
6664 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
6665 #endif
6666 #endif
6667 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6668 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
6669 ((mp_maxid+1) * sizeof(struct sctpstat)),
6670 SCTP_M_MCORE);
6671 #endif
6672 (void)SCTP_GETTIME_TIMEVAL(&tv);
6673 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6674 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid+1)));
6675 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
6676 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
6677 #else
6678 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
6679 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
6680 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
6681 #endif
6682 /* init the empty list of (All) Endpoints */
6683 LIST_INIT(&SCTP_BASE_INFO(listhead));
6684 #if defined(__APPLE__)
6685 LIST_INIT(&SCTP_BASE_INFO(inplisthead));
6686 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6687 SCTP_BASE_INFO(sctbinfo).listhead = &SCTP_BASE_INFO(inplisthead);
6688 SCTP_BASE_INFO(sctbinfo).mtx_grp_attr = lck_grp_attr_alloc_init();
6689 lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6690 SCTP_BASE_INFO(sctbinfo).mtx_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6691 SCTP_BASE_INFO(sctbinfo).mtx_attr = lck_attr_alloc_init();
6692 lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6693 #else
6694 SCTP_BASE_INFO(sctbinfo).ipi_listhead = &SCTP_BASE_INFO(inplisthead);
6695 SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr = lck_grp_attr_alloc_init();
6696 lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6697 SCTP_BASE_INFO(sctbinfo).ipi_lock_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6698 SCTP_BASE_INFO(sctbinfo).ipi_lock_attr = lck_attr_alloc_init();
6699 lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6700 #endif
6701 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6702 SCTP_BASE_INFO(sctbinfo).ipi_gc = sctp_gc;
6703 in_pcbinfo_attach(&SCTP_BASE_INFO(sctbinfo));
6704 #endif
6705 #endif
6706
6707
6708 /* init the hash table of endpoints */
6709 #if defined(__FreeBSD__)
6710 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
6711 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
6712 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6713 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
6714 #else
6715 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
6716 SCTP_BASE_SYSCTL(sctp_hashtblsize));
6717 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
6718 SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6719 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
6720 SCTP_BASE_SYSCTL(sctp_chunkscale));
6721 #endif
6722 #endif
6723 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
6724 &SCTP_BASE_INFO(hashasocmark));
6725 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6726 &SCTP_BASE_INFO(hashmark));
6727 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6728 &SCTP_BASE_INFO(hashtcpmark));
6729 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
6730
6731
6732 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
6733 &SCTP_BASE_INFO(hashvrfmark));
6734
6735 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
6736 &SCTP_BASE_INFO(vrf_ifn_hashmark));
6737 /* init the zones */
6738 /*
6739 * FIX ME: Should check for NULL returns, but if it does fail we are
6740 * doomed to panic anyways... add later maybe.
6741 */
6742 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
6743 sizeof(struct sctp_inpcb), maxsockets);
6744
6745 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
6746 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
6747
6748 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
6749 sizeof(struct sctp_laddr),
6750 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6751
6752 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
6753 sizeof(struct sctp_nets),
6754 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6755
6756 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
6757 sizeof(struct sctp_tmit_chunk),
6758 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6759
6760 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
6761 sizeof(struct sctp_queued_to_read),
6762 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6763
6764 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
6765 sizeof(struct sctp_stream_queue_pending),
6766 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6767
6768 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
6769 sizeof(struct sctp_asconf),
6770 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6771
6772 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
6773 sizeof(struct sctp_asconf_ack),
6774 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6775
6776
6777 /* Master Lock INIT for info structure */
6778 SCTP_INP_INFO_LOCK_INIT();
6779 SCTP_STATLOG_INIT_LOCK();
6780
6781 SCTP_IPI_COUNT_INIT();
6782 SCTP_IPI_ADDR_INIT();
6783 #ifdef SCTP_PACKET_LOGGING
6784 SCTP_IP_PKTLOG_INIT();
6785 #endif
6786 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
6787
6788 SCTP_WQ_ADDR_INIT();
6789 /* not sure if we need all the counts */
6790 SCTP_BASE_INFO(ipi_count_ep) = 0;
6791 /* assoc/tcb zone info */
6792 SCTP_BASE_INFO(ipi_count_asoc) = 0;
6793 /* local addrlist zone info */
6794 SCTP_BASE_INFO(ipi_count_laddr) = 0;
6795 /* remote addrlist zone info */
6796 SCTP_BASE_INFO(ipi_count_raddr) = 0;
6797 /* chunk info */
6798 SCTP_BASE_INFO(ipi_count_chunk) = 0;
6799
6800 /* socket queue zone info */
6801 SCTP_BASE_INFO(ipi_count_readq) = 0;
6802
6803 /* stream out queue cont */
6804 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
6805
6806 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
6807 SCTP_BASE_INFO(ipi_free_chunks) = 0;
6808
6809 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
6810
6811 /* Init the TIMEWAIT list */
6812 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6813 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
6814 }
6815 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6816 #if defined(__Userspace_os_Windows)
6817 InitializeConditionVariable(&sctp_it_ctl.iterator_wakeup);
6818 #else
6819 (void)pthread_cond_init(&sctp_it_ctl.iterator_wakeup, NULL);
6820 #endif
6821 #endif
6822 sctp_startup_iterator();
6823
6824 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6825 sctp_startup_mcore_threads();
6826 #endif
6827
6828 #ifndef __Panda__
6829 /*
6830 * INIT the default VRF which for BSD is the only one, other O/S's
6831 * may have more. But initially they must start with one and then
6832 * add the VRF's as addresses are added.
6833 */
6834 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
6835 #endif
6836 #if defined(__FreeBSD__) && __FreeBSD_cc_version >= 1200000
6837 if (ip_register_flow_handler(sctp_netisr_hdlr, IPPROTO_SCTP)) {
6838 SCTP_PRINTF("***SCTP- Error can't register netisr handler***\n");
6839 }
6840 #endif
6841 #if defined(_SCTP_NEEDS_CALLOUT_) || defined(_USER_SCTP_NEEDS_CALLOUT_)
6842 /* allocate the lock for the callout/timer queue */
6843 SCTP_TIMERQ_LOCK_INIT();
6844 TAILQ_INIT(&SCTP_BASE_INFO(callqueue));
6845 #endif
6846 #if defined(__Userspace__)
6847 mbuf_init(NULL);
6848 atomic_init();
6849 #if defined(INET) || defined(INET6)
6850 recv_thread_init();
6851 #endif
6852 #endif
6853 }
6854
6855 /*
6856 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
6857 */
6858 void
6859 sctp_pcb_finish(void)
6860 {
6861 struct sctp_vrflist *vrf_bucket;
6862 struct sctp_vrf *vrf, *nvrf;
6863 struct sctp_ifn *ifn, *nifn;
6864 struct sctp_ifa *ifa, *nifa;
6865 struct sctpvtaghead *chain;
6866 struct sctp_tagblock *twait_block, *prev_twait_block;
6867 struct sctp_laddr *wi, *nwi;
6868 int i;
6869 struct sctp_iterator *it, *nit;
6870
6871 #if !defined(__FreeBSD__)
6872 /* Notify the iterator to exit. */
6873 SCTP_IPI_ITERATOR_WQ_LOCK();
6874 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_MUST_EXIT;
6875 sctp_wakeup_iterator();
6876 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6877 #endif
6878 #if defined(__APPLE__)
6879 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6880 in_pcbinfo_detach(&SCTP_BASE_INFO(sctbinfo));
6881 #endif
6882 SCTP_IPI_ITERATOR_WQ_LOCK();
6883 do {
6884 msleep(&sctp_it_ctl.iterator_flags,
6885 sctp_it_ctl.ipi_iterator_wq_mtx,
6886 0, "waiting_for_work", 0);
6887 } while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_EXITED) == 0);
6888 thread_deallocate(sctp_it_ctl.thread_proc);
6889 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6890 #endif
6891 #if defined(__Windows__)
6892 if (sctp_it_ctl.iterator_thread_obj != NULL) {
6893 NTSTATUS status = STATUS_SUCCESS;
6894
6895 KeSetEvent(&sctp_it_ctl.iterator_wakeup[1], IO_NO_INCREMENT, FALSE);
6896 status = KeWaitForSingleObject(sctp_it_ctl.iterator_thread_obj,
6897 Executive,
6898 KernelMode,
6899 FALSE,
6900 NULL);
6901 ObDereferenceObject(sctp_it_ctl.iterator_thread_obj);
6902 }
6903 #endif
6904 #if defined(__Userspace__)
6905 if (sctp_it_ctl.thread_proc) {
6906 #if defined(__Userspace_os_Windows)
6907 WaitForSingleObject(sctp_it_ctl.thread_proc, INFINITE);
6908 CloseHandle(sctp_it_ctl.thread_proc);
6909 sctp_it_ctl.thread_proc = NULL;
6910 #else
6911 pthread_join(sctp_it_ctl.thread_proc, NULL);
6912 sctp_it_ctl.thread_proc = 0;
6913 #endif
6914 }
6915 #endif
6916 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6917 #if defined(__Userspace_os_Windows)
6918 DeleteConditionVariable(&sctp_it_ctl.iterator_wakeup);
6919 #else
6920 pthread_cond_destroy(&sctp_it_ctl.iterator_wakeup);
6921 #endif
6922 #endif
6923 /* In FreeBSD the iterator thread never exits
6924 * but we do clean up.
6925 * The only way FreeBSD reaches here is if we have VRF's
6926 * but we still add the ifdef to make it compile on old versions.
6927 */
6928 SCTP_IPI_ITERATOR_WQ_LOCK();
6929 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6930 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6931 if (it->vn != curvnet) {
6932 continue;
6933 }
6934 #endif
6935 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6936 if (it->function_atend != NULL) {
6937 (*it->function_atend) (it->pointer, it->val);
6938 }
6939 SCTP_FREE(it,SCTP_M_ITER);
6940 }
6941 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6942 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6943 SCTP_ITERATOR_LOCK();
6944 if ((sctp_it_ctl.cur_it) &&
6945 (sctp_it_ctl.cur_it->vn == curvnet)) {
6946 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6947 }
6948 SCTP_ITERATOR_UNLOCK();
6949 #endif
6950 #if !defined(__FreeBSD__)
6951 SCTP_IPI_ITERATOR_WQ_DESTROY();
6952 SCTP_ITERATOR_LOCK_DESTROY();
6953 #endif
6954 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6955 SCTP_WQ_ADDR_LOCK();
6956 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6957 LIST_REMOVE(wi, sctp_nxt_addr);
6958 SCTP_DECR_LADDR_COUNT();
6959 if (wi->action == SCTP_DEL_IP_ADDRESS) {
6960 SCTP_FREE(wi->ifa, SCTP_M_IFA);
6961 }
6962 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6963 }
6964 SCTP_WQ_ADDR_UNLOCK();
6965
6966 /*
6967 * free the vrf/ifn/ifa lists and hashes (be sure address monitor
6968 * is destroyed first).
6969 */
6970 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6971 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6972 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6973 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6974 /* free the ifa */
6975 LIST_REMOVE(ifa, next_bucket);
6976 LIST_REMOVE(ifa, next_ifa);
6977 SCTP_FREE(ifa, SCTP_M_IFA);
6978 }
6979 /* free the ifn */
6980 LIST_REMOVE(ifn, next_bucket);
6981 LIST_REMOVE(ifn, next_ifn);
6982 SCTP_FREE(ifn, SCTP_M_IFN);
6983 }
6984 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6985 /* free the vrf */
6986 LIST_REMOVE(vrf, next_vrf);
6987 SCTP_FREE(vrf, SCTP_M_VRF);
6988 }
6989 /* free the vrf hashes */
6990 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6991 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6992 #if defined(__Userspace__) && !defined(__Userspace_os_Windows)
6993 /* free memory allocated by getifaddrs call */
6994 #if defined(INET) || defined(INET6)
6995 freeifaddrs(g_interfaces);
6996 #endif
6997 #endif
6998
6999 /* free the TIMEWAIT list elements malloc'd in the function
7000 * sctp_add_vtag_to_timewait()...
7001 */
7002 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
7003 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
7004 if (!LIST_EMPTY(chain)) {
7005 prev_twait_block = NULL;
7006 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
7007 if (prev_twait_block) {
7008 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
7009 }
7010 prev_twait_block = twait_block;
7011 }
7012 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
7013 }
7014 }
7015
7016 /* free the locks and mutexes */
7017 #if defined(__APPLE__)
7018 SCTP_TIMERQ_LOCK_DESTROY();
7019 #endif
7020 #ifdef SCTP_PACKET_LOGGING
7021 SCTP_IP_PKTLOG_DESTROY();
7022 #endif
7023 SCTP_IPI_ADDR_DESTROY();
7024 #if defined(__APPLE__)
7025 SCTP_IPI_COUNT_DESTROY();
7026 #endif
7027 SCTP_STATLOG_DESTROY();
7028 SCTP_INP_INFO_LOCK_DESTROY();
7029
7030 SCTP_WQ_ADDR_DESTROY();
7031
7032 #if defined(__APPLE__)
7033 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
7034 lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
7035 lck_grp_free(SCTP_BASE_INFO(sctbinfo).mtx_grp);
7036 lck_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_attr);
7037 #else
7038 lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
7039 lck_grp_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp);
7040 lck_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
7041 #endif
7042 #endif
7043 #if defined(__Userspace__)
7044 SCTP_TIMERQ_LOCK_DESTROY();
7045 SCTP_ZONE_DESTROY(zone_mbuf);
7046 SCTP_ZONE_DESTROY(zone_clust);
7047 SCTP_ZONE_DESTROY(zone_ext_refcnt);
7048 #endif
7049 #if defined(__Windows__) || defined(__FreeBSD__) || defined(__Userspace__)
7050 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
7051 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
7052 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
7053 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
7054 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
7055 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
7056 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
7057 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
7058 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
7059 #endif
7060 /* Get rid of other stuff to */
7061 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
7062 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
7063 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
7064 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
7065 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
7066 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
7067 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
7068 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
7069 #endif
7070 }
7071
7072
7073 int
7074 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
7075 int offset, int limit,
7076 struct sockaddr *src, struct sockaddr *dst,
7077 struct sockaddr *altsa)
7078 {
7079 /*
7080 * grub through the INIT pulling addresses and loading them to the
7081 * nets structure in the asoc. The from address in the mbuf should
7082 * also be loaded (if it is not already). This routine can be called
7083 * with either INIT or INIT-ACK's as long as the m points to the IP
7084 * packet and the offset points to the beginning of the parameters.
7085 */
7086 struct sctp_inpcb *inp;
7087 struct sctp_nets *net, *nnet, *net_tmp;
7088 struct sctp_paramhdr *phdr, parm_buf;
7089 struct sctp_tcb *stcb_tmp;
7090 uint16_t ptype, plen;
7091 struct sockaddr *sa;
7092 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
7093 struct sctp_auth_random *p_random = NULL;
7094 uint16_t random_len = 0;
7095 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
7096 struct sctp_auth_hmac_algo *hmacs = NULL;
7097 uint16_t hmacs_len = 0;
7098 uint8_t saw_asconf = 0;
7099 uint8_t saw_asconf_ack = 0;
7100 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
7101 struct sctp_auth_chunk_list *chunks = NULL;
7102 uint16_t num_chunks = 0;
7103 sctp_key_t *new_key;
7104 uint32_t keylen;
7105 int got_random = 0, got_hmacs = 0, got_chklist = 0;
7106 uint8_t peer_supports_ecn;
7107 uint8_t peer_supports_prsctp;
7108 uint8_t peer_supports_auth;
7109 uint8_t peer_supports_asconf;
7110 uint8_t peer_supports_asconf_ack;
7111 uint8_t peer_supports_reconfig;
7112 uint8_t peer_supports_nrsack;
7113 uint8_t peer_supports_pktdrop;
7114 #ifdef INET
7115 struct sockaddr_in sin;
7116 #endif
7117 #ifdef INET6
7118 struct sockaddr_in6 sin6;
7119 #endif
7120
7121 /* First get the destination address setup too. */
7122 #ifdef INET
7123 memset(&sin, 0, sizeof(sin));
7124 sin.sin_family = AF_INET;
7125 #ifdef HAVE_SIN_LEN
7126 sin.sin_len = sizeof(sin);
7127 #endif
7128 sin.sin_port = stcb->rport;
7129 #endif
7130 #ifdef INET6
7131 memset(&sin6, 0, sizeof(sin6));
7132 sin6.sin6_family = AF_INET6;
7133 #ifdef HAVE_SIN6_LEN
7134 sin6.sin6_len = sizeof(struct sockaddr_in6);
7135 #endif
7136 sin6.sin6_port = stcb->rport;
7137 #endif
7138 if (altsa) {
7139 sa = altsa;
7140 } else {
7141 sa = src;
7142 }
7143 peer_supports_ecn = 0;
7144 peer_supports_prsctp = 0;
7145 peer_supports_auth = 0;
7146 peer_supports_asconf = 0;
7147 peer_supports_reconfig = 0;
7148 peer_supports_nrsack = 0;
7149 peer_supports_pktdrop = 0;
7150 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
7151 /* mark all addresses that we have currently on the list */
7152 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
7153 }
7154 /* does the source address already exist? if so skip it */
7155 inp = stcb->sctp_ep;
7156 atomic_add_int(&stcb->asoc.refcnt, 1);
7157 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
7158 atomic_add_int(&stcb->asoc.refcnt, -1);
7159
7160 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
7161 /* we must add the source address */
7162 /* no scope set here since we have a tcb already. */
7163 switch (sa->sa_family) {
7164 #ifdef INET
7165 case AF_INET:
7166 if (stcb->asoc.scope.ipv4_addr_legal) {
7167 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
7168 return (-1);
7169 }
7170 }
7171 break;
7172 #endif
7173 #ifdef INET6
7174 case AF_INET6:
7175 if (stcb->asoc.scope.ipv6_addr_legal) {
7176 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7177 return (-2);
7178 }
7179 }
7180 break;
7181 #endif
7182 #if defined(__Userspace__)
7183 case AF_CONN:
7184 if (stcb->asoc.scope.conn_addr_legal) {
7185 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7186 return (-2);
7187 }
7188 }
7189 break;
7190 #endif
7191 default:
7192 break;
7193 }
7194 } else {
7195 if (net_tmp != NULL && stcb_tmp == stcb) {
7196 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
7197 } else if (stcb_tmp != stcb) {
7198 /* It belongs to another association? */
7199 if (stcb_tmp)
7200 SCTP_TCB_UNLOCK(stcb_tmp);
7201 return (-3);
7202 }
7203 }
7204 if (stcb->asoc.state == 0) {
7205 /* the assoc was freed? */
7206 return (-4);
7207 }
7208 /* now we must go through each of the params. */
7209 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
7210 while (phdr) {
7211 ptype = ntohs(phdr->param_type);
7212 plen = ntohs(phdr->param_length);
7213 /*
7214 * SCTP_PRINTF("ptype => %0x, plen => %d\n", (uint32_t)ptype,
7215 * (int)plen);
7216 */
7217 if (offset + plen > limit) {
7218 break;
7219 }
7220 if (plen == 0) {
7221 break;
7222 }
7223 #ifdef INET
7224 if (ptype == SCTP_IPV4_ADDRESS) {
7225 if (stcb->asoc.scope.ipv4_addr_legal) {
7226 struct sctp_ipv4addr_param *p4, p4_buf;
7227
7228 /* ok get the v4 address and check/add */
7229 phdr = sctp_get_next_param(m, offset,
7230 (struct sctp_paramhdr *)&p4_buf,
7231 sizeof(p4_buf));
7232 if (plen != sizeof(struct sctp_ipv4addr_param) ||
7233 phdr == NULL) {
7234 return (-5);
7235 }
7236 p4 = (struct sctp_ipv4addr_param *)phdr;
7237 sin.sin_addr.s_addr = p4->addr;
7238 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
7239 /* Skip multi-cast addresses */
7240 goto next_param;
7241 }
7242 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
7243 (sin.sin_addr.s_addr == INADDR_ANY)) {
7244 goto next_param;
7245 }
7246 sa = (struct sockaddr *)&sin;
7247 inp = stcb->sctp_ep;
7248 atomic_add_int(&stcb->asoc.refcnt, 1);
7249 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7250 dst, stcb);
7251 atomic_add_int(&stcb->asoc.refcnt, -1);
7252
7253 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
7254 inp == NULL) {
7255 /* we must add the source address */
7256 /*
7257 * no scope set since we have a tcb
7258 * already
7259 */
7260
7261 /*
7262 * we must validate the state again
7263 * here
7264 */
7265 add_it_now:
7266 if (stcb->asoc.state == 0) {
7267 /* the assoc was freed? */
7268 return (-7);
7269 }
7270 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
7271 return (-8);
7272 }
7273 } else if (stcb_tmp == stcb) {
7274 if (stcb->asoc.state == 0) {
7275 /* the assoc was freed? */
7276 return (-10);
7277 }
7278 if (net != NULL) {
7279 /* clear flag */
7280 net->dest_state &=
7281 ~SCTP_ADDR_NOT_IN_ASSOC;
7282 }
7283 } else {
7284 /*
7285 * strange, address is in another
7286 * assoc? straighten out locks.
7287 */
7288 if (stcb_tmp) {
7289 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
7290 /* in setup state we abort this guy */
7291 sctp_abort_an_association(stcb_tmp->sctp_ep,
7292 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
7293 goto add_it_now;
7294 }
7295 SCTP_TCB_UNLOCK(stcb_tmp);
7296 }
7297
7298 if (stcb->asoc.state == 0) {
7299 /* the assoc was freed? */
7300 return (-12);
7301 }
7302 return (-13);
7303 }
7304 }
7305 } else
7306 #endif
7307 #ifdef INET6
7308 if (ptype == SCTP_IPV6_ADDRESS) {
7309 if (stcb->asoc.scope.ipv6_addr_legal) {
7310 /* ok get the v6 address and check/add */
7311 struct sctp_ipv6addr_param *p6, p6_buf;
7312
7313 phdr = sctp_get_next_param(m, offset,
7314 (struct sctp_paramhdr *)&p6_buf,
7315 sizeof(p6_buf));
7316 if (plen != sizeof(struct sctp_ipv6addr_param) ||
7317 phdr == NULL) {
7318 return (-14);
7319 }
7320 p6 = (struct sctp_ipv6addr_param *)phdr;
7321 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
7322 sizeof(p6->addr));
7323 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
7324 /* Skip multi-cast addresses */
7325 goto next_param;
7326 }
7327 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
7328 /* Link local make no sense without scope */
7329 goto next_param;
7330 }
7331 sa = (struct sockaddr *)&sin6;
7332 inp = stcb->sctp_ep;
7333 atomic_add_int(&stcb->asoc.refcnt, 1);
7334 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7335 dst, stcb);
7336 atomic_add_int(&stcb->asoc.refcnt, -1);
7337 if (stcb_tmp == NULL &&
7338 (inp == stcb->sctp_ep || inp == NULL)) {
7339 /*
7340 * we must validate the state again
7341 * here
7342 */
7343 add_it_now6:
7344 if (stcb->asoc.state == 0) {
7345 /* the assoc was freed? */
7346 return (-16);
7347 }
7348 /*
7349 * we must add the address, no scope
7350 * set
7351 */
7352 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
7353 return (-17);
7354 }
7355 } else if (stcb_tmp == stcb) {
7356 /*
7357 * we must validate the state again
7358 * here
7359 */
7360 if (stcb->asoc.state == 0) {
7361 /* the assoc was freed? */
7362 return (-19);
7363 }
7364 if (net != NULL) {
7365 /* clear flag */
7366 net->dest_state &=
7367 ~SCTP_ADDR_NOT_IN_ASSOC;
7368 }
7369 } else {
7370 /*
7371 * strange, address is in another
7372 * assoc? straighten out locks.
7373 */
7374 if (stcb_tmp)
7375 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
7376 /* in setup state we abort this guy */
7377 sctp_abort_an_association(stcb_tmp->sctp_ep,
7378 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
7379 goto add_it_now6;
7380 }
7381 SCTP_TCB_UNLOCK(stcb_tmp);
7382
7383 if (stcb->asoc.state == 0) {
7384 /* the assoc was freed? */
7385 return (-21);
7386 }
7387 return (-22);
7388 }
7389 }
7390 } else
7391 #endif
7392 if (ptype == SCTP_ECN_CAPABLE) {
7393 peer_supports_ecn = 1;
7394 } else if (ptype == SCTP_ULP_ADAPTATION) {
7395 if (stcb->asoc.state != SCTP_STATE_OPEN) {
7396 struct sctp_adaptation_layer_indication ai, *aip;
7397
7398 phdr = sctp_get_next_param(m, offset,
7399 (struct sctp_paramhdr *)&ai, sizeof(ai));
7400 aip = (struct sctp_adaptation_layer_indication *)phdr;
7401 if (aip) {
7402 stcb->asoc.peers_adaptation = ntohl(aip->indication);
7403 stcb->asoc.adaptation_needed = 1;
7404 }
7405 }
7406 } else if (ptype == SCTP_SET_PRIM_ADDR) {
7407 struct sctp_asconf_addr_param lstore, *fee;
7408 int lptype;
7409 struct sockaddr *lsa = NULL;
7410 #ifdef INET
7411 struct sctp_asconf_addrv4_param *fii;
7412 #endif
7413
7414 if (stcb->asoc.asconf_supported == 0) {
7415 return (-100);
7416 }
7417 if (plen > sizeof(lstore)) {
7418 return (-23);
7419 }
7420 phdr = sctp_get_next_param(m, offset,
7421 (struct sctp_paramhdr *)&lstore,
7422 min(plen,sizeof(lstore)));
7423 if (phdr == NULL) {
7424 return (-24);
7425 }
7426 fee = (struct sctp_asconf_addr_param *)phdr;
7427 lptype = ntohs(fee->addrp.ph.param_type);
7428 switch (lptype) {
7429 #ifdef INET
7430 case SCTP_IPV4_ADDRESS:
7431 if (plen !=
7432 sizeof(struct sctp_asconf_addrv4_param)) {
7433 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
7434 (int)sizeof(struct sctp_asconf_addrv4_param),
7435 plen);
7436 } else {
7437 fii = (struct sctp_asconf_addrv4_param *)fee;
7438 sin.sin_addr.s_addr = fii->addrp.addr;
7439 lsa = (struct sockaddr *)&sin;
7440 }
7441 break;
7442 #endif
7443 #ifdef INET6
7444 case SCTP_IPV6_ADDRESS:
7445 if (plen !=
7446 sizeof(struct sctp_asconf_addr_param)) {
7447 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
7448 (int)sizeof(struct sctp_asconf_addr_param),
7449 plen);
7450 } else {
7451 memcpy(sin6.sin6_addr.s6_addr,
7452 fee->addrp.addr,
7453 sizeof(fee->addrp.addr));
7454 lsa = (struct sockaddr *)&sin6;
7455 }
7456 break;
7457 #endif
7458 default:
7459 break;
7460 }
7461 if (lsa) {
7462 (void)sctp_set_primary_addr(stcb, sa, NULL);
7463 }
7464 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
7465 stcb->asoc.peer_supports_nat = 1;
7466 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
7467 /* Peer supports pr-sctp */
7468 peer_supports_prsctp = 1;
7469 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
7470 /* A supported extension chunk */
7471 struct sctp_supported_chunk_types_param *pr_supported;
7472 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
7473 int num_ent, i;
7474
7475 phdr = sctp_get_next_param(m, offset,
7476 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store),plen));
7477 if (phdr == NULL) {
7478 return (-25);
7479 }
7480 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
7481 num_ent = plen - sizeof(struct sctp_paramhdr);
7482 for (i = 0; i < num_ent; i++) {
7483 switch (pr_supported->chunk_types[i]) {
7484 case SCTP_ASCONF:
7485 peer_supports_asconf = 1;
7486 case SCTP_ASCONF_ACK:
7487 peer_supports_asconf_ack = 1;
7488 break;
7489 case SCTP_FORWARD_CUM_TSN:
7490 peer_supports_prsctp = 1;
7491 break;
7492 case SCTP_PACKET_DROPPED:
7493 peer_supports_pktdrop = 1;
7494 break;
7495 case SCTP_NR_SELECTIVE_ACK:
7496 peer_supports_nrsack = 1;
7497 break;
7498 case SCTP_STREAM_RESET:
7499 peer_supports_reconfig = 1;
7500 break;
7501 case SCTP_AUTHENTICATION:
7502 peer_supports_auth = 1;
7503 break;
7504 default:
7505 /* one I have not learned yet */
7506 break;
7507
7508 }
7509 }
7510 } else if (ptype == SCTP_RANDOM) {
7511 if (plen > sizeof(random_store))
7512 break;
7513 if (got_random) {
7514 /* already processed a RANDOM */
7515 goto next_param;
7516 }
7517 phdr = sctp_get_next_param(m, offset,
7518 (struct sctp_paramhdr *)random_store,
7519 min(sizeof(random_store),plen));
7520 if (phdr == NULL)
7521 return (-26);
7522 p_random = (struct sctp_auth_random *)phdr;
7523 random_len = plen - sizeof(*p_random);
7524 /* enforce the random length */
7525 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
7526 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
7527 return (-27);
7528 }
7529 got_random = 1;
7530 } else if (ptype == SCTP_HMAC_LIST) {
7531 int num_hmacs;
7532 int i;
7533
7534 if (plen > sizeof(hmacs_store))
7535 break;
7536 if (got_hmacs) {
7537 /* already processed a HMAC list */
7538 goto next_param;
7539 }
7540 phdr = sctp_get_next_param(m, offset,
7541 (struct sctp_paramhdr *)hmacs_store,
7542 min(plen,sizeof(hmacs_store)));
7543 if (phdr == NULL)
7544 return (-28);
7545 hmacs = (struct sctp_auth_hmac_algo *)phdr;
7546 hmacs_len = plen - sizeof(*hmacs);
7547 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
7548 /* validate the hmac list */
7549 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
7550 return (-29);
7551 }
7552 if (stcb->asoc.peer_hmacs != NULL)
7553 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
7554 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
7555 if (stcb->asoc.peer_hmacs != NULL) {
7556 for (i = 0; i < num_hmacs; i++) {
7557 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
7558 ntohs(hmacs->hmac_ids[i]));
7559 }
7560 }
7561 got_hmacs = 1;
7562 } else if (ptype == SCTP_CHUNK_LIST) {
7563 int i;
7564
7565 if (plen > sizeof(chunks_store))
7566 break;
7567 if (got_chklist) {
7568 /* already processed a Chunks list */
7569 goto next_param;
7570 }
7571 phdr = sctp_get_next_param(m, offset,
7572 (struct sctp_paramhdr *)chunks_store,
7573 min(plen,sizeof(chunks_store)));
7574 if (phdr == NULL)
7575 return (-30);
7576 chunks = (struct sctp_auth_chunk_list *)phdr;
7577 num_chunks = plen - sizeof(*chunks);
7578 if (stcb->asoc.peer_auth_chunks != NULL)
7579 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
7580 else
7581 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
7582 for (i = 0; i < num_chunks; i++) {
7583 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
7584 stcb->asoc.peer_auth_chunks);
7585 /* record asconf/asconf-ack if listed */
7586 if (chunks->chunk_types[i] == SCTP_ASCONF)
7587 saw_asconf = 1;
7588 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
7589 saw_asconf_ack = 1;
7590
7591 }
7592 got_chklist = 1;
7593 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
7594 (ptype == SCTP_STATE_COOKIE) ||
7595 (ptype == SCTP_UNRECOG_PARAM) ||
7596 (ptype == SCTP_COOKIE_PRESERVE) ||
7597 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
7598 (ptype == SCTP_ADD_IP_ADDRESS) ||
7599 (ptype == SCTP_DEL_IP_ADDRESS) ||
7600 (ptype == SCTP_ERROR_CAUSE_IND) ||
7601 (ptype == SCTP_SUCCESS_REPORT)) {
7602 /* don't care */ ;
7603 } else {
7604 if ((ptype & 0x8000) == 0x0000) {
7605 /*
7606 * must stop processing the rest of the
7607 * param's. Any report bits were handled
7608 * with the call to
7609 * sctp_arethere_unrecognized_parameters()
7610 * when the INIT or INIT-ACK was first seen.
7611 */
7612 break;
7613 }
7614 }
7615
7616 next_param:
7617 offset += SCTP_SIZE32(plen);
7618 if (offset >= limit) {
7619 break;
7620 }
7621 phdr = sctp_get_next_param(m, offset, &parm_buf,
7622 sizeof(parm_buf));
7623 }
7624 /* Now check to see if we need to purge any addresses */
7625 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
7626 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
7627 SCTP_ADDR_NOT_IN_ASSOC) {
7628 /* This address has been removed from the asoc */
7629 /* remove and free it */
7630 stcb->asoc.numnets--;
7631 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
7632 sctp_free_remote_addr(net);
7633 if (net == stcb->asoc.primary_destination) {
7634 stcb->asoc.primary_destination = NULL;
7635 sctp_select_primary_destination(stcb);
7636 }
7637 }
7638 }
7639 if ((stcb->asoc.ecn_supported == 1) &&
7640 (peer_supports_ecn == 0)) {
7641 stcb->asoc.ecn_supported = 0;
7642 }
7643 if ((stcb->asoc.prsctp_supported == 1) &&
7644 (peer_supports_prsctp == 0)) {
7645 stcb->asoc.prsctp_supported = 0;
7646 }
7647 if ((stcb->asoc.auth_supported == 1) &&
7648 ((peer_supports_auth == 0) ||
7649 (got_random == 0) || (got_hmacs == 0))) {
7650 stcb->asoc.auth_supported = 0;
7651 }
7652 if ((stcb->asoc.asconf_supported == 1) &&
7653 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
7654 (stcb->asoc.auth_supported == 0) ||
7655 (saw_asconf == 0) || (saw_asconf_ack == 0))) {
7656 stcb->asoc.asconf_supported = 0;
7657 }
7658 if ((stcb->asoc.reconfig_supported == 1) &&
7659 (peer_supports_reconfig == 0)) {
7660 stcb->asoc.reconfig_supported = 0;
7661 }
7662 if ((stcb->asoc.nrsack_supported == 1) &&
7663 (peer_supports_nrsack == 0)) {
7664 stcb->asoc.nrsack_supported = 0;
7665 }
7666 if ((stcb->asoc.pktdrop_supported == 1) &&
7667 (peer_supports_pktdrop == 0)){
7668 stcb->asoc.pktdrop_supported = 0;
7669 }
7670 /* validate authentication required parameters */
7671 if ((peer_supports_auth == 0) && (got_chklist == 1)) {
7672 /* peer does not support auth but sent a chunks list? */
7673 return (-31);
7674 }
7675 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
7676 /* peer supports asconf but not auth? */
7677 return (-32);
7678 } else if ((peer_supports_asconf == 1) &&
7679 (peer_supports_auth == 1) &&
7680 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
7681 return (-33);
7682 }
7683 /* concatenate the full random key */
7684 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
7685 if (chunks != NULL) {
7686 keylen += sizeof(*chunks) + num_chunks;
7687 }
7688 new_key = sctp_alloc_key(keylen);
7689 if (new_key != NULL) {
7690 /* copy in the RANDOM */
7691 if (p_random != NULL) {
7692 keylen = sizeof(*p_random) + random_len;
7693 bcopy(p_random, new_key->key, keylen);
7694 }
7695 /* append in the AUTH chunks */
7696 if (chunks != NULL) {
7697 bcopy(chunks, new_key->key + keylen,
7698 sizeof(*chunks) + num_chunks);
7699 keylen += sizeof(*chunks) + num_chunks;
7700 }
7701 /* append in the HMACs */
7702 if (hmacs != NULL) {
7703 bcopy(hmacs, new_key->key + keylen,
7704 sizeof(*hmacs) + hmacs_len);
7705 }
7706 } else {
7707 /* failed to get memory for the key */
7708 return (-34);
7709 }
7710 if (stcb->asoc.authinfo.peer_random != NULL)
7711 sctp_free_key(stcb->asoc.authinfo.peer_random);
7712 stcb->asoc.authinfo.peer_random = new_key;
7713 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
7714 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
7715
7716 return (0);
7717 }
7718
7719 int
7720 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
7721 struct sctp_nets *net)
7722 {
7723 /* make sure the requested primary address exists in the assoc */
7724 if (net == NULL && sa)
7725 net = sctp_findnet(stcb, sa);
7726
7727 if (net == NULL) {
7728 /* didn't find the requested primary address! */
7729 return (-1);
7730 } else {
7731 /* set the primary address */
7732 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7733 /* Must be confirmed, so queue to set */
7734 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
7735 return (0);
7736 }
7737 stcb->asoc.primary_destination = net;
7738 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
7739 sctp_free_remote_addr(stcb->asoc.alternate);
7740 stcb->asoc.alternate = NULL;
7741 }
7742 net = TAILQ_FIRST(&stcb->asoc.nets);
7743 if (net != stcb->asoc.primary_destination) {
7744 /* first one on the list is NOT the primary
7745 * sctp_cmpaddr() is much more efficient if
7746 * the primary is the first on the list, make it
7747 * so.
7748 */
7749 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7750 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7751 }
7752 return (0);
7753 }
7754 }
7755
7756 int
7757 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
7758 {
7759 /*
7760 * This function serves two purposes. It will see if a TAG can be
7761 * re-used and return 1 for yes it is ok and 0 for don't use that
7762 * tag. A secondary function it will do is purge out old tags that
7763 * can be removed.
7764 */
7765 struct sctpvtaghead *chain;
7766 struct sctp_tagblock *twait_block;
7767 struct sctpasochead *head;
7768 struct sctp_tcb *stcb;
7769 int i;
7770
7771 SCTP_INP_INFO_RLOCK();
7772 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
7773 SCTP_BASE_INFO(hashasocmark))];
7774 if (head == NULL) {
7775 /* invalid vtag */
7776 goto skip_vtag_check;
7777 }
7778 LIST_FOREACH(stcb, head, sctp_asocs) {
7779 /* We choose not to lock anything here. TCB's can't be
7780 * removed since we have the read lock, so they can't
7781 * be freed on us, same thing for the INP. I may
7782 * be wrong with this assumption, but we will go
7783 * with it for now :-)
7784 */
7785 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
7786 continue;
7787 }
7788 if (stcb->asoc.my_vtag == tag) {
7789 /* candidate */
7790 if (stcb->rport != rport) {
7791 continue;
7792 }
7793 if (stcb->sctp_ep->sctp_lport != lport) {
7794 continue;
7795 }
7796 /* Its a used tag set */
7797 SCTP_INP_INFO_RUNLOCK();
7798 return (0);
7799 }
7800 }
7801 skip_vtag_check:
7802
7803 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
7804 /* Now what about timed wait ? */
7805 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
7806 /*
7807 * Block(s) are present, lets see if we have this tag in the
7808 * list
7809 */
7810 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
7811 if (twait_block->vtag_block[i].v_tag == 0) {
7812 /* not used */
7813 continue;
7814 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
7815 now->tv_sec) {
7816 /* Audit expires this guy */
7817 twait_block->vtag_block[i].tv_sec_at_expire = 0;
7818 twait_block->vtag_block[i].v_tag = 0;
7819 twait_block->vtag_block[i].lport = 0;
7820 twait_block->vtag_block[i].rport = 0;
7821 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
7822 (twait_block->vtag_block[i].lport == lport) &&
7823 (twait_block->vtag_block[i].rport == rport)) {
7824 /* Bad tag, sorry :< */
7825 SCTP_INP_INFO_RUNLOCK();
7826 return (0);
7827 }
7828 }
7829 }
7830 SCTP_INP_INFO_RUNLOCK();
7831 return (1);
7832 }
7833
7834 static void
7835 sctp_drain_mbufs(struct sctp_tcb *stcb)
7836 {
7837 /*
7838 * We must hunt this association for MBUF's past the cumack (i.e.
7839 * out of order data that we can renege on).
7840 */
7841 struct sctp_association *asoc;
7842 struct sctp_tmit_chunk *chk, *nchk;
7843 uint32_t cumulative_tsn_p1;
7844 struct sctp_queued_to_read *ctl, *nctl;
7845 int cnt, strmat;
7846 uint32_t gap, i;
7847 int fnd = 0;
7848
7849 /* We look for anything larger than the cum-ack + 1 */
7850
7851 asoc = &stcb->asoc;
7852 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
7853 /* none we can reneg on. */
7854 return;
7855 }
7856 SCTP_STAT_INCR(sctps_protocol_drains_done);
7857 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
7858 cnt = 0;
7859 /* First look in the re-assembly queue */
7860 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
7861 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
7862 /* Yep it is above cum-ack */
7863 cnt++;
7864 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
7865 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
7866 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
7867 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7868 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
7869 if (chk->data) {
7870 sctp_m_freem(chk->data);
7871 chk->data = NULL;
7872 }
7873 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7874 }
7875 }
7876 /* Ok that was fun, now we will drain all the inbound streams? */
7877 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
7878 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
7879 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
7880 /* Yep it is above cum-ack */
7881 cnt++;
7882 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
7883 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
7884 sctp_ucount_decr(asoc->cnt_on_all_streams);
7885 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7886 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
7887 if (ctl->data) {
7888 sctp_m_freem(ctl->data);
7889 ctl->data = NULL;
7890 }
7891 sctp_free_remote_addr(ctl->whoFrom);
7892 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
7893 SCTP_DECR_READQ_COUNT();
7894 }
7895 }
7896 }
7897 if (cnt) {
7898 /* We must back down to see what the new highest is */
7899 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
7900 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
7901 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
7902 asoc->highest_tsn_inside_map = i;
7903 fnd = 1;
7904 break;
7905 }
7906 }
7907 if (!fnd) {
7908 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7909 }
7910
7911 /*
7912 * Question, should we go through the delivery queue? The only
7913 * reason things are on here is the app not reading OR a p-d-api up.
7914 * An attacker COULD send enough in to initiate the PD-API and then
7915 * send a bunch of stuff to other streams... these would wind up on
7916 * the delivery queue.. and then we would not get to them. But in
7917 * order to do this I then have to back-track and un-deliver
7918 * sequence numbers in streams.. el-yucko. I think for now we will
7919 * NOT look at the delivery queue and leave it to be something to
7920 * consider later. An alternative would be to abort the P-D-API with
7921 * a notification and then deliver the data.... Or another method
7922 * might be to keep track of how many times the situation occurs and
7923 * if we see a possible attack underway just abort the association.
7924 */
7925 #ifdef SCTP_DEBUG
7926 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7927 #endif
7928 /*
7929 * Now do we need to find a new
7930 * asoc->highest_tsn_inside_map?
7931 */
7932 asoc->last_revoke_count = cnt;
7933 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7934 /*sa_ignore NO_NULL_CHK*/
7935 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7936 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7937 }
7938 /*
7939 * Another issue, in un-setting the TSN's in the mapping array we
7940 * DID NOT adjust the highest_tsn marker. This will cause one of two
7941 * things to occur. It may cause us to do extra work in checking for
7942 * our mapping array movement. More importantly it may cause us to
7943 * SACK every datagram. This may not be a bad thing though since we
7944 * will recover once we get our cum-ack above and all this stuff we
7945 * dumped recovered.
7946 */
7947 }
7948
7949 void
7950 sctp_drain()
7951 {
7952 /*
7953 * We must walk the PCB lists for ALL associations here. The system
7954 * is LOW on MBUF's and needs help. This is where reneging will
7955 * occur. We really hope this does NOT happen!
7956 */
7957 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7958 VNET_ITERATOR_DECL(vnet_iter);
7959 #else
7960 struct sctp_inpcb *inp;
7961 struct sctp_tcb *stcb;
7962
7963 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7964 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7965 return;
7966 }
7967 #endif
7968 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7969 VNET_LIST_RLOCK_NOSLEEP();
7970 VNET_FOREACH(vnet_iter) {
7971 CURVNET_SET(vnet_iter);
7972 struct sctp_inpcb *inp;
7973 struct sctp_tcb *stcb;
7974 #endif
7975
7976 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7977 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7978 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7979 #ifdef VIMAGE
7980 continue;
7981 #else
7982 return;
7983 #endif
7984 }
7985 #endif
7986 SCTP_INP_INFO_RLOCK();
7987 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7988 /* For each endpoint */
7989 SCTP_INP_RLOCK(inp);
7990 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7991 /* For each association */
7992 SCTP_TCB_LOCK(stcb);
7993 sctp_drain_mbufs(stcb);
7994 SCTP_TCB_UNLOCK(stcb);
7995 }
7996 SCTP_INP_RUNLOCK(inp);
7997 }
7998 SCTP_INP_INFO_RUNLOCK();
7999 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
8000 CURVNET_RESTORE();
8001 }
8002 VNET_LIST_RUNLOCK_NOSLEEP();
8003 #endif
8004 }
8005
8006 /*
8007 * start a new iterator
8008 * iterates through all endpoints and associations based on the pcb_state
8009 * flags and asoc_state. "af" (mandatory) is executed for all matching
8010 * assocs and "ef" (optional) is executed when the iterator completes.
8011 * "inpf" (optional) is executed for each new endpoint as it is being
8012 * iterated through. inpe (optional) is called when the inp completes
8013 * its way through all the stcbs.
8014 */
8015 int
8016 sctp_initiate_iterator(inp_func inpf,
8017 asoc_func af,
8018 inp_func inpe,
8019 uint32_t pcb_state,
8020 uint32_t pcb_features,
8021 uint32_t asoc_state,
8022 void *argp,
8023 uint32_t argi,
8024 end_func ef,
8025 struct sctp_inpcb *s_inp,
8026 uint8_t chunk_output_off)
8027 {
8028 struct sctp_iterator *it = NULL;
8029
8030 if (af == NULL) {
8031 return (-1);
8032 }
8033 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
8034 SCTP_M_ITER);
8035 if (it == NULL) {
8036 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
8037 return (ENOMEM);
8038 }
8039 memset(it, 0, sizeof(*it));
8040 it->function_assoc = af;
8041 it->function_inp = inpf;
8042 if (inpf)
8043 it->done_current_ep = 0;
8044 else
8045 it->done_current_ep = 1;
8046 it->function_atend = ef;
8047 it->pointer = argp;
8048 it->val = argi;
8049 it->pcb_flags = pcb_state;
8050 it->pcb_features = pcb_features;
8051 it->asoc_state = asoc_state;
8052 it->function_inp_end = inpe;
8053 it->no_chunk_output = chunk_output_off;
8054 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
8055 it->vn = curvnet;
8056 #endif
8057 if (s_inp) {
8058 /* Assume lock is held here */
8059 it->inp = s_inp;
8060 SCTP_INP_INCR_REF(it->inp);
8061 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
8062 } else {
8063 SCTP_INP_INFO_RLOCK();
8064 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
8065 if (it->inp) {
8066 SCTP_INP_INCR_REF(it->inp);
8067 }
8068 SCTP_INP_INFO_RUNLOCK();
8069 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
8070
8071 }
8072 SCTP_IPI_ITERATOR_WQ_LOCK();
8073
8074 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
8075 if (sctp_it_ctl.iterator_running == 0) {
8076 sctp_wakeup_iterator();
8077 }
8078 SCTP_IPI_ITERATOR_WQ_UNLOCK();
8079 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
8080 return (0);
8081 }
8082