1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
17 *
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37
38 #include <netinet/sctp_os.h>
39 #include <sys/proc.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_pcb.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp.h>
45 #include <netinet/sctp_header.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_output.h>
48 #include <netinet/sctp_timer.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
52 #endif
53 #ifdef INET6
54 #include <netinet6/ip6_var.h>
55 #endif
56 #include <sys/sched.h>
57 #include <sys/smp.h>
58 #include <sys/unistd.h>
59
60 /* FIX: we don't handle multiple link local scopes */
61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
62 #ifdef INET6
63 int
SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 * a,struct sockaddr_in6 * b)64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
65 {
66 struct sockaddr_in6 tmp_a, tmp_b;
67
68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
70 return (0);
71 }
72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
74 return (0);
75 }
76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
77 }
78 #endif
79
80 void
sctp_fill_pcbinfo(struct sctp_pcbinfo * spcb)81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
82 {
83 /*
84 * We really don't need to lock this, but I will just because it
85 * does not hurt.
86 */
87 SCTP_INP_INFO_RLOCK();
88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
96 SCTP_INP_INFO_RUNLOCK();
97 }
98
99 /*-
100 * Addresses are added to VRF's (Virtual Router's). For BSD we
101 * have only the default VRF 0. We maintain a hash list of
102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
103 * these has a list of addresses. When we add a new address
104 * to a VRF we lookup the ifn/ifn_index, if the ifn does
105 * not exist we create it and add it to the list of IFN's
106 * within the VRF. Once we have the sctp_ifn, we add the
107 * address to the list. So we look something like:
108 *
109 * hash-vrf-table
110 * vrf-> ifn-> ifn -> ifn
111 * vrf |
112 * ... +--ifa-> ifa -> ifa
113 * vrf
114 *
115 * We keep these separate lists since the SCTP subsystem will
116 * point to these from its source address selection nets structure.
117 * When an address is deleted it does not happen right away on
118 * the SCTP side, it gets scheduled. What we do when a
119 * delete happens is immediately remove the address from
120 * the master list and decrement the refcount. As our
121 * addip iterator works through and frees the src address
122 * selection pointing to the sctp_ifa, eventually the refcount
123 * will reach 0 and we will delete it. Note that it is assumed
124 * that any locking on system level ifn/ifa is done at the
125 * caller of these functions and these routines will only
126 * lock the SCTP structures as they add or delete things.
127 *
128 * Other notes on VRF concepts.
129 * - An endpoint can be in multiple VRF's
130 * - An association lives within a VRF and only one VRF.
131 * - Any incoming packet we can deduce the VRF for by
132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
133 * - Any downward send call or connect call must supply the
134 * VRF via ancillary data or via some sort of set default
135 * VRF socket option call (again for BSD no brainer since
136 * the VRF is always 0).
137 * - An endpoint may add multiple VRF's to it.
138 * - Listening sockets can accept associations in any
139 * of the VRF's they are in but the assoc will end up
140 * in only one VRF (gotten from the packet or connect/send).
141 *
142 */
143
144 struct sctp_vrf *
sctp_allocate_vrf(int vrf_id)145 sctp_allocate_vrf(int vrf_id)
146 {
147 struct sctp_vrf *vrf = NULL;
148 struct sctp_vrflist *bucket;
149
150 /* First allocate the VRF structure */
151 vrf = sctp_find_vrf(vrf_id);
152 if (vrf) {
153 /* Already allocated */
154 return (vrf);
155 }
156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
157 SCTP_M_VRF);
158 if (vrf == NULL) {
159 /* No memory */
160 #ifdef INVARIANTS
161 panic("No memory for VRF:%d", vrf_id);
162 #endif
163 return (NULL);
164 }
165 /* setup the VRF */
166 memset(vrf, 0, sizeof(struct sctp_vrf));
167 vrf->vrf_id = vrf_id;
168 LIST_INIT(&vrf->ifnlist);
169 vrf->total_ifa_count = 0;
170 vrf->refcount = 0;
171 /* now also setup table ids */
172 SCTP_INIT_VRF_TABLEID(vrf);
173 /* Init the HASH of addresses */
174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
175 &vrf->vrf_addr_hashmark);
176 if (vrf->vrf_addr_hash == NULL) {
177 /* No memory */
178 #ifdef INVARIANTS
179 panic("No memory for VRF:%d", vrf_id);
180 #endif
181 SCTP_FREE(vrf, SCTP_M_VRF);
182 return (NULL);
183 }
184
185 /* Add it to the hash table */
186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
187 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
189 return (vrf);
190 }
191
192 struct sctp_ifn *
sctp_find_ifn(void * ifn,uint32_t ifn_index)193 sctp_find_ifn(void *ifn, uint32_t ifn_index)
194 {
195 struct sctp_ifn *sctp_ifnp;
196 struct sctp_ifnlist *hash_ifn_head;
197
198 /*
199 * We assume the lock is held for the addresses if that's wrong
200 * problems could occur :-)
201 */
202 SCTP_IPI_ADDR_LOCK_ASSERT();
203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
205 if (sctp_ifnp->ifn_index == ifn_index) {
206 return (sctp_ifnp);
207 }
208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
209 return (sctp_ifnp);
210 }
211 }
212 return (NULL);
213 }
214
215 struct sctp_vrf *
sctp_find_vrf(uint32_t vrf_id)216 sctp_find_vrf(uint32_t vrf_id)
217 {
218 struct sctp_vrflist *bucket;
219 struct sctp_vrf *liste;
220
221 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
222 LIST_FOREACH(liste, bucket, next_vrf) {
223 if (vrf_id == liste->vrf_id) {
224 return (liste);
225 }
226 }
227 return (NULL);
228 }
229
230 void
sctp_free_vrf(struct sctp_vrf * vrf)231 sctp_free_vrf(struct sctp_vrf *vrf)
232 {
233 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
234 if (vrf->vrf_addr_hash) {
235 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
236 vrf->vrf_addr_hash = NULL;
237 }
238 /* We zero'd the count */
239 LIST_REMOVE(vrf, next_vrf);
240 SCTP_FREE(vrf, SCTP_M_VRF);
241 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
242 }
243 }
244
245 void
sctp_free_ifn(struct sctp_ifn * sctp_ifnp)246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
247 {
248 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
249 /* We zero'd the count */
250 if (sctp_ifnp->vrf) {
251 sctp_free_vrf(sctp_ifnp->vrf);
252 }
253 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
254 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
255 }
256 }
257
258 void
sctp_update_ifn_mtu(uint32_t ifn_index,uint32_t mtu)259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
260 {
261 struct sctp_ifn *sctp_ifnp;
262
263 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
264 if (sctp_ifnp != NULL) {
265 sctp_ifnp->ifn_mtu = mtu;
266 }
267 }
268
269 void
sctp_free_ifa(struct sctp_ifa * sctp_ifap)270 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
271 {
272 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
273 /* We zero'd the count */
274 if (sctp_ifap->ifn_p) {
275 sctp_free_ifn(sctp_ifap->ifn_p);
276 }
277 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
278 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
279 }
280 }
281
282 static void
sctp_delete_ifn(struct sctp_ifn * sctp_ifnp,int hold_addr_lock)283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
284 {
285 struct sctp_ifn *found;
286
287 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
288 if (found == NULL) {
289 /* Not in the list.. sorry */
290 return;
291 }
292 if (hold_addr_lock == 0) {
293 SCTP_IPI_ADDR_WLOCK();
294 } else {
295 SCTP_IPI_ADDR_WLOCK_ASSERT();
296 }
297 LIST_REMOVE(sctp_ifnp, next_bucket);
298 LIST_REMOVE(sctp_ifnp, next_ifn);
299 if (hold_addr_lock == 0) {
300 SCTP_IPI_ADDR_WUNLOCK();
301 }
302 /* Take away the reference, and possibly free it */
303 sctp_free_ifn(sctp_ifnp);
304 }
305
306 void
sctp_mark_ifa_addr_down(uint32_t vrf_id,struct sockaddr * addr,const char * if_name,uint32_t ifn_index)307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
308 const char *if_name, uint32_t ifn_index)
309 {
310 struct sctp_vrf *vrf;
311 struct sctp_ifa *sctp_ifap;
312
313 SCTP_IPI_ADDR_RLOCK();
314 vrf = sctp_find_vrf(vrf_id);
315 if (vrf == NULL) {
316 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
317 goto out;
318 }
319 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
320 if (sctp_ifap == NULL) {
321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
322 goto out;
323 }
324 if (sctp_ifap->ifn_p == NULL) {
325 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
326 goto out;
327 }
328 if (if_name) {
329 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
331 sctp_ifap->ifn_p->ifn_name, if_name);
332 goto out;
333 }
334 } else {
335 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
336 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
337 sctp_ifap->ifn_p->ifn_index, ifn_index);
338 goto out;
339 }
340 }
341
342 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
343 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
344 out:
345 SCTP_IPI_ADDR_RUNLOCK();
346 }
347
348 void
sctp_mark_ifa_addr_up(uint32_t vrf_id,struct sockaddr * addr,const char * if_name,uint32_t ifn_index)349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
350 const char *if_name, uint32_t ifn_index)
351 {
352 struct sctp_vrf *vrf;
353 struct sctp_ifa *sctp_ifap;
354
355 SCTP_IPI_ADDR_RLOCK();
356 vrf = sctp_find_vrf(vrf_id);
357 if (vrf == NULL) {
358 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
359 goto out;
360 }
361 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
362 if (sctp_ifap == NULL) {
363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
364 goto out;
365 }
366 if (sctp_ifap->ifn_p == NULL) {
367 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
368 goto out;
369 }
370 if (if_name) {
371 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
372 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
373 sctp_ifap->ifn_p->ifn_name, if_name);
374 goto out;
375 }
376 } else {
377 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
379 sctp_ifap->ifn_p->ifn_index, ifn_index);
380 goto out;
381 }
382 }
383
384 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
385 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
386 out:
387 SCTP_IPI_ADDR_RUNLOCK();
388 }
389
390 /*-
391 * Add an ifa to an ifn.
392 * Register the interface as necessary.
393 * NOTE: ADDR write lock MUST be held.
394 */
395 static void
sctp_add_ifa_to_ifn(struct sctp_ifn * sctp_ifnp,struct sctp_ifa * sctp_ifap)396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
397 {
398 int ifa_af;
399
400 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
401 sctp_ifap->ifn_p = sctp_ifnp;
402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
403 /* update address counts */
404 sctp_ifnp->ifa_count++;
405 ifa_af = sctp_ifap->address.sa.sa_family;
406 switch (ifa_af) {
407 #ifdef INET
408 case AF_INET:
409 sctp_ifnp->num_v4++;
410 break;
411 #endif
412 #ifdef INET6
413 case AF_INET6:
414 sctp_ifnp->num_v6++;
415 break;
416 #endif
417 default:
418 break;
419 }
420 if (sctp_ifnp->ifa_count == 1) {
421 /* register the new interface */
422 sctp_ifnp->registered_af = ifa_af;
423 }
424 }
425
426 /*-
427 * Remove an ifa from its ifn.
428 * If no more addresses exist, remove the ifn too. Otherwise, re-register
429 * the interface based on the remaining address families left.
430 * NOTE: ADDR write lock MUST be held.
431 */
432 static void
sctp_remove_ifa_from_ifn(struct sctp_ifa * sctp_ifap)433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
434 {
435 LIST_REMOVE(sctp_ifap, next_ifa);
436 if (sctp_ifap->ifn_p) {
437 /* update address counts */
438 sctp_ifap->ifn_p->ifa_count--;
439 switch (sctp_ifap->address.sa.sa_family) {
440 #ifdef INET
441 case AF_INET:
442 sctp_ifap->ifn_p->num_v4--;
443 break;
444 #endif
445 #ifdef INET6
446 case AF_INET6:
447 sctp_ifap->ifn_p->num_v6--;
448 break;
449 #endif
450 default:
451 break;
452 }
453
454 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
455 /* remove the ifn, possibly freeing it */
456 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
457 } else {
458 /* re-register address family type, if needed */
459 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
460 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
461 sctp_ifap->ifn_p->registered_af = AF_INET;
462 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
463 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
464 sctp_ifap->ifn_p->registered_af = AF_INET6;
465 }
466 /* free the ifn refcount */
467 sctp_free_ifn(sctp_ifap->ifn_p);
468 }
469 sctp_ifap->ifn_p = NULL;
470 }
471 }
472
473 struct sctp_ifa *
sctp_add_addr_to_vrf(uint32_t vrf_id,void * ifn,uint32_t ifn_index,uint32_t ifn_type,const char * if_name,void * ifa,struct sockaddr * addr,uint32_t ifa_flags,int dynamic_add)474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
475 uint32_t ifn_type, const char *if_name, void *ifa,
476 struct sockaddr *addr, uint32_t ifa_flags,
477 int dynamic_add)
478 {
479 struct sctp_vrf *vrf;
480 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
481 struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
482 struct sctp_ifalist *hash_addr_head;
483 struct sctp_ifnlist *hash_ifn_head;
484 uint32_t hash_of_addr;
485 int new_ifn_af = 0;
486
487 #ifdef SCTP_DEBUG
488 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
489 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
490 #endif
491 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
492 sizeof(struct sctp_ifn), SCTP_M_IFN);
493 if (new_sctp_ifnp == NULL) {
494 #ifdef INVARIANTS
495 panic("No memory for IFN");
496 #endif
497 return (NULL);
498 }
499 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
500 if (new_sctp_ifap == NULL) {
501 #ifdef INVARIANTS
502 panic("No memory for IFA");
503 #endif
504 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
505 return (NULL);
506 }
507
508 SCTP_IPI_ADDR_WLOCK();
509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
510 if (sctp_ifnp) {
511 vrf = sctp_ifnp->vrf;
512 } else {
513 vrf = sctp_find_vrf(vrf_id);
514 if (vrf == NULL) {
515 vrf = sctp_allocate_vrf(vrf_id);
516 if (vrf == NULL) {
517 SCTP_IPI_ADDR_WUNLOCK();
518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
519 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
520 return (NULL);
521 }
522 }
523 }
524 if (sctp_ifnp == NULL) {
525 /*
526 * build one and add it, can't hold lock until after malloc
527 * done though.
528 */
529 sctp_ifnp = new_sctp_ifnp;
530 new_sctp_ifnp = NULL;
531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
532 sctp_ifnp->ifn_index = ifn_index;
533 sctp_ifnp->ifn_p = ifn;
534 sctp_ifnp->ifn_type = ifn_type;
535 sctp_ifnp->refcount = 0;
536 sctp_ifnp->vrf = vrf;
537 atomic_add_int(&vrf->refcount, 1);
538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
539 if (if_name != NULL) {
540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
541 } else {
542 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
543 }
544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
545 LIST_INIT(&sctp_ifnp->ifalist);
546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
549 new_ifn_af = 1;
550 }
551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
552 if (sctp_ifap) {
553 /* Hmm, it already exists? */
554 if ((sctp_ifap->ifn_p) &&
555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
557 sctp_ifap->ifn_p->ifn_name, ifn_index,
558 (void *)sctp_ifap);
559 if (new_ifn_af) {
560 /* Remove the created one that we don't want */
561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
562 }
563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
564 /* easy to solve, just switch back to active */
565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
567 sctp_ifap->ifn_p = sctp_ifnp;
568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
569 }
570 exit_stage_left:
571 SCTP_IPI_ADDR_WUNLOCK();
572 if (new_sctp_ifnp != NULL) {
573 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
574 }
575 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
576 return (sctp_ifap);
577 } else {
578 if (sctp_ifap->ifn_p) {
579 /*
580 * The last IFN gets the address, remove the
581 * old one
582 */
583 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
584 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
585 sctp_ifap->ifn_p->ifn_index, if_name,
586 ifn_index);
587 /* remove the address from the old ifn */
588 sctp_remove_ifa_from_ifn(sctp_ifap);
589 /* move the address over to the new ifn */
590 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
591 goto exit_stage_left;
592 } else {
593 /* repair ifnp which was NULL ? */
594 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
595 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
596 (void *)sctp_ifnp, (void *)sctp_ifap);
597 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
598 }
599 goto exit_stage_left;
600 }
601 }
602 sctp_ifap = new_sctp_ifap;
603 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
604 sctp_ifap->ifn_p = sctp_ifnp;
605 atomic_add_int(&sctp_ifnp->refcount, 1);
606 sctp_ifap->vrf_id = vrf_id;
607 sctp_ifap->ifa = ifa;
608 memcpy(&sctp_ifap->address, addr, addr->sa_len);
609 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
610 sctp_ifap->flags = ifa_flags;
611 /* Set scope */
612 switch (sctp_ifap->address.sa.sa_family) {
613 #ifdef INET
614 case AF_INET:
615 {
616 struct sockaddr_in *sin;
617
618 sin = &sctp_ifap->address.sin;
619 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
620 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
621 sctp_ifap->src_is_loop = 1;
622 }
623 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
624 sctp_ifap->src_is_priv = 1;
625 }
626 sctp_ifnp->num_v4++;
627 if (new_ifn_af)
628 new_ifn_af = AF_INET;
629 break;
630 }
631 #endif
632 #ifdef INET6
633 case AF_INET6:
634 {
635 /* ok to use deprecated addresses? */
636 struct sockaddr_in6 *sin6;
637
638 sin6 = &sctp_ifap->address.sin6;
639 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
640 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
641 sctp_ifap->src_is_loop = 1;
642 }
643 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
644 sctp_ifap->src_is_priv = 1;
645 }
646 sctp_ifnp->num_v6++;
647 if (new_ifn_af)
648 new_ifn_af = AF_INET6;
649 break;
650 }
651 #endif
652 default:
653 new_ifn_af = 0;
654 break;
655 }
656 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
657
658 if ((sctp_ifap->src_is_priv == 0) &&
659 (sctp_ifap->src_is_loop == 0)) {
660 sctp_ifap->src_is_glob = 1;
661 }
662 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
663 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
664 sctp_ifap->refcount = 1;
665 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
666 sctp_ifnp->ifa_count++;
667 vrf->total_ifa_count++;
668 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
669 if (new_ifn_af) {
670 sctp_ifnp->registered_af = new_ifn_af;
671 }
672 SCTP_IPI_ADDR_WUNLOCK();
673 if (new_sctp_ifnp != NULL) {
674 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
675 }
676
677 if (dynamic_add) {
678 /*
679 * Bump up the refcount so that when the timer completes it
680 * will drop back down.
681 */
682 struct sctp_laddr *wi;
683
684 atomic_add_int(&sctp_ifap->refcount, 1);
685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
686 if (wi == NULL) {
687 /*
688 * Gak, what can we do? We have lost an address
689 * change can you say HOSED?
690 */
691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
692 /* Opps, must decrement the count */
693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
694 if_name);
695 return (NULL);
696 }
697 SCTP_INCR_LADDR_COUNT();
698 memset(wi, 0, sizeof(*wi));
699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
700 wi->ifa = sctp_ifap;
701 wi->action = SCTP_ADD_IP_ADDRESS;
702
703 SCTP_WQ_ADDR_LOCK();
704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
705 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
706 (struct sctp_inpcb *)NULL,
707 (struct sctp_tcb *)NULL,
708 (struct sctp_nets *)NULL);
709 SCTP_WQ_ADDR_UNLOCK();
710 } else {
711 /* it's ready for use */
712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
713 }
714 return (sctp_ifap);
715 }
716
717 void
sctp_del_addr_from_vrf(uint32_t vrf_id,struct sockaddr * addr,uint32_t ifn_index,const char * if_name)718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
719 uint32_t ifn_index, const char *if_name)
720 {
721 struct sctp_vrf *vrf;
722 struct sctp_ifa *sctp_ifap = NULL;
723
724 SCTP_IPI_ADDR_WLOCK();
725 vrf = sctp_find_vrf(vrf_id);
726 if (vrf == NULL) {
727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
728 goto out_now;
729 }
730
731 #ifdef SCTP_DEBUG
732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
734 #endif
735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
736 if (sctp_ifap) {
737 /* Validate the delete */
738 if (sctp_ifap->ifn_p) {
739 int valid = 0;
740
741 /*-
742 * The name has priority over the ifn_index
743 * if its given.
744 */
745 if (if_name) {
746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
747 /* They match its a correct delete */
748 valid = 1;
749 }
750 }
751 if (!valid) {
752 /* last ditch check ifn_index */
753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
754 valid = 1;
755 }
756 }
757 if (!valid) {
758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
759 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
762 SCTP_IPI_ADDR_WUNLOCK();
763 return;
764 }
765 }
766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
768 /*
769 * We don't set the flag. This means that the structure will
770 * hang around in EP's that have bound specific to it until
771 * they close. This gives us TCP like behavior if someone
772 * removes an address (or for that matter adds it right
773 * back).
774 */
775 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
776 vrf->total_ifa_count--;
777 LIST_REMOVE(sctp_ifap, next_bucket);
778 sctp_remove_ifa_from_ifn(sctp_ifap);
779 }
780 #ifdef SCTP_DEBUG
781 else {
782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
783 ifn_index);
784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
785 }
786 #endif
787
788 out_now:
789 SCTP_IPI_ADDR_WUNLOCK();
790 if (sctp_ifap) {
791 struct sctp_laddr *wi;
792
793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
794 if (wi == NULL) {
795 /*
796 * Gak, what can we do? We have lost an address
797 * change can you say HOSED?
798 */
799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
800
801 /* Oops, must decrement the count */
802 sctp_free_ifa(sctp_ifap);
803 return;
804 }
805 SCTP_INCR_LADDR_COUNT();
806 memset(wi, 0, sizeof(*wi));
807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
808 wi->ifa = sctp_ifap;
809 wi->action = SCTP_DEL_IP_ADDRESS;
810 SCTP_WQ_ADDR_LOCK();
811 /*
812 * Should this really be a tailq? As it is we will process
813 * the newest first :-0
814 */
815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
817 (struct sctp_inpcb *)NULL,
818 (struct sctp_tcb *)NULL,
819 (struct sctp_nets *)NULL);
820 SCTP_WQ_ADDR_UNLOCK();
821 }
822 return;
823 }
824
825 static int
sctp_does_stcb_own_this_addr(struct sctp_tcb * stcb,struct sockaddr * to)826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
827 {
828 int loopback_scope;
829 #if defined(INET)
830 int ipv4_local_scope, ipv4_addr_legal;
831 #endif
832 #if defined(INET6)
833 int local_scope, site_scope, ipv6_addr_legal;
834 #endif
835 struct sctp_vrf *vrf;
836 struct sctp_ifn *sctp_ifn;
837 struct sctp_ifa *sctp_ifa;
838
839 loopback_scope = stcb->asoc.scope.loopback_scope;
840 #if defined(INET)
841 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
842 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
843 #endif
844 #if defined(INET6)
845 local_scope = stcb->asoc.scope.local_scope;
846 site_scope = stcb->asoc.scope.site_scope;
847 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
848 #endif
849
850 SCTP_IPI_ADDR_RLOCK();
851 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
852 if (vrf == NULL) {
853 /* no vrf, no addresses */
854 SCTP_IPI_ADDR_RUNLOCK();
855 return (0);
856 }
857
858 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
859 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
860 if ((loopback_scope == 0) &&
861 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
862 continue;
863 }
864 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
865 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
866 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
867 /*
868 * We allow pending addresses, where
869 * we have sent an asconf-add to be
870 * considered valid.
871 */
872 continue;
873 }
874 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
875 continue;
876 }
877 switch (sctp_ifa->address.sa.sa_family) {
878 #ifdef INET
879 case AF_INET:
880 if (ipv4_addr_legal) {
881 struct sockaddr_in *sin,
882 *rsin;
883
884 sin = &sctp_ifa->address.sin;
885 rsin = (struct sockaddr_in *)to;
886 if ((ipv4_local_scope == 0) &&
887 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
888 continue;
889 }
890 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
891 &sin->sin_addr) != 0) {
892 continue;
893 }
894 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
895 SCTP_IPI_ADDR_RUNLOCK();
896 return (1);
897 }
898 }
899 break;
900 #endif
901 #ifdef INET6
902 case AF_INET6:
903 if (ipv6_addr_legal) {
904 struct sockaddr_in6 *sin6,
905 *rsin6;
906
907 sin6 = &sctp_ifa->address.sin6;
908 rsin6 = (struct sockaddr_in6 *)to;
909 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
910 &sin6->sin6_addr) != 0) {
911 continue;
912 }
913 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
914 if (local_scope == 0)
915 continue;
916 if (sin6->sin6_scope_id == 0) {
917 if (sa6_recoverscope(sin6) != 0)
918 continue;
919 }
920 }
921 if ((site_scope == 0) &&
922 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
923 continue;
924 }
925 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
926 SCTP_IPI_ADDR_RUNLOCK();
927 return (1);
928 }
929 }
930 break;
931 #endif
932 default:
933 /* TSNH */
934 break;
935 }
936 }
937 }
938 } else {
939 struct sctp_laddr *laddr;
940
941 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
942 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
943 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
944 continue;
945 }
946 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
947 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
948 /*
949 * We allow pending addresses, where we have
950 * sent an asconf-add to be considered
951 * valid.
952 */
953 continue;
954 }
955 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
956 continue;
957 }
958 switch (to->sa_family) {
959 #ifdef INET
960 case AF_INET:
961 {
962 struct sockaddr_in *sin, *rsin;
963
964 sin = &laddr->ifa->address.sin;
965 rsin = (struct sockaddr_in *)to;
966 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
967 SCTP_IPI_ADDR_RUNLOCK();
968 return (1);
969 }
970 break;
971 }
972 #endif
973 #ifdef INET6
974 case AF_INET6:
975 {
976 struct sockaddr_in6 *sin6, *rsin6;
977
978 sin6 = &laddr->ifa->address.sin6;
979 rsin6 = (struct sockaddr_in6 *)to;
980 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
981 SCTP_IPI_ADDR_RUNLOCK();
982 return (1);
983 }
984 break;
985 }
986
987 #endif
988 default:
989 /* TSNH */
990 break;
991 }
992 }
993 }
994 SCTP_IPI_ADDR_RUNLOCK();
995 return (0);
996 }
997
998 static struct sctp_tcb *
sctp_tcb_special_locate(struct sctp_inpcb ** inp_p,struct sockaddr * from,struct sockaddr * to,struct sctp_nets ** netp,uint32_t vrf_id)999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1000 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1001 {
1002 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1003 /*
1004 * If we support the TCP model, then we must now dig through to see
1005 * if we can find our endpoint in the list of tcp ep's.
1006 */
1007 uint16_t lport, rport;
1008 struct sctppcbhead *ephead;
1009 struct sctp_inpcb *inp;
1010 struct sctp_laddr *laddr;
1011 struct sctp_tcb *stcb;
1012 struct sctp_nets *net;
1013
1014 if ((to == NULL) || (from == NULL)) {
1015 return (NULL);
1016 }
1017
1018 switch (to->sa_family) {
1019 #ifdef INET
1020 case AF_INET:
1021 if (from->sa_family == AF_INET) {
1022 lport = ((struct sockaddr_in *)to)->sin_port;
1023 rport = ((struct sockaddr_in *)from)->sin_port;
1024 } else {
1025 return (NULL);
1026 }
1027 break;
1028 #endif
1029 #ifdef INET6
1030 case AF_INET6:
1031 if (from->sa_family == AF_INET6) {
1032 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1033 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1034 } else {
1035 return (NULL);
1036 }
1037 break;
1038 #endif
1039 default:
1040 return (NULL);
1041 }
1042 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1043 /*
1044 * Ok now for each of the guys in this bucket we must look and see:
1045 * - Does the remote port match. - Does there single association's
1046 * addresses match this address (to). If so we update p_ep to point
1047 * to this ep and return the tcb from it.
1048 */
1049 LIST_FOREACH(inp, ephead, sctp_hash) {
1050 SCTP_INP_RLOCK(inp);
1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1052 SCTP_INP_RUNLOCK(inp);
1053 continue;
1054 }
1055 if (lport != inp->sctp_lport) {
1056 SCTP_INP_RUNLOCK(inp);
1057 continue;
1058 }
1059 switch (to->sa_family) {
1060 #ifdef INET
1061 case AF_INET:
1062 {
1063 struct sockaddr_in *sin;
1064
1065 sin = (struct sockaddr_in *)to;
1066 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1067 &sin->sin_addr) != 0) {
1068 SCTP_INP_RUNLOCK(inp);
1069 continue;
1070 }
1071 break;
1072 }
1073 #endif
1074 #ifdef INET6
1075 case AF_INET6:
1076 {
1077 struct sockaddr_in6 *sin6;
1078
1079 sin6 = (struct sockaddr_in6 *)to;
1080 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1081 &sin6->sin6_addr) != 0) {
1082 SCTP_INP_RUNLOCK(inp);
1083 continue;
1084 }
1085 break;
1086 }
1087 #endif
1088 default:
1089 SCTP_INP_RUNLOCK(inp);
1090 continue;
1091 }
1092 if (inp->def_vrf_id != vrf_id) {
1093 SCTP_INP_RUNLOCK(inp);
1094 continue;
1095 }
1096 /* check to see if the ep has one of the addresses */
1097 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1098 /* We are NOT bound all, so look further */
1099 int match = 0;
1100
1101 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1102 if (laddr->ifa == NULL) {
1103 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1104 continue;
1105 }
1106 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1107 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1108 continue;
1109 }
1110 if (laddr->ifa->address.sa.sa_family ==
1111 to->sa_family) {
1112 /* see if it matches */
1113 #ifdef INET
1114 if (from->sa_family == AF_INET) {
1115 struct sockaddr_in *intf_addr,
1116 *sin;
1117
1118 intf_addr = &laddr->ifa->address.sin;
1119 sin = (struct sockaddr_in *)to;
1120 if (sin->sin_addr.s_addr ==
1121 intf_addr->sin_addr.s_addr) {
1122 match = 1;
1123 break;
1124 }
1125 }
1126 #endif
1127 #ifdef INET6
1128 if (from->sa_family == AF_INET6) {
1129 struct sockaddr_in6 *intf_addr6;
1130 struct sockaddr_in6 *sin6;
1131
1132 sin6 = (struct sockaddr_in6 *)
1133 to;
1134 intf_addr6 = &laddr->ifa->address.sin6;
1135
1136 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1137 intf_addr6)) {
1138 match = 1;
1139 break;
1140 }
1141 }
1142 #endif
1143 }
1144 }
1145 if (match == 0) {
1146 /* This endpoint does not have this address */
1147 SCTP_INP_RUNLOCK(inp);
1148 continue;
1149 }
1150 }
1151 /*
1152 * Ok if we hit here the ep has the address, does it hold
1153 * the tcb?
1154 */
1155 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1156 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1157 if (stcb == NULL) {
1158 SCTP_INP_RUNLOCK(inp);
1159 continue;
1160 }
1161 SCTP_TCB_LOCK(stcb);
1162 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1163 SCTP_TCB_UNLOCK(stcb);
1164 SCTP_INP_RUNLOCK(inp);
1165 continue;
1166 }
1167 if (stcb->rport != rport) {
1168 /* remote port does not match. */
1169 SCTP_TCB_UNLOCK(stcb);
1170 SCTP_INP_RUNLOCK(inp);
1171 continue;
1172 }
1173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1174 SCTP_TCB_UNLOCK(stcb);
1175 SCTP_INP_RUNLOCK(inp);
1176 continue;
1177 }
1178 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1179 SCTP_TCB_UNLOCK(stcb);
1180 SCTP_INP_RUNLOCK(inp);
1181 continue;
1182 }
1183 /* Does this TCB have a matching address? */
1184 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1185 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1186 /* not the same family, can't be a match */
1187 continue;
1188 }
1189 switch (from->sa_family) {
1190 #ifdef INET
1191 case AF_INET:
1192 {
1193 struct sockaddr_in *sin, *rsin;
1194
1195 sin = (struct sockaddr_in *)&net->ro._l_addr;
1196 rsin = (struct sockaddr_in *)from;
1197 if (sin->sin_addr.s_addr ==
1198 rsin->sin_addr.s_addr) {
1199 /* found it */
1200 if (netp != NULL) {
1201 *netp = net;
1202 }
1203 /*
1204 * Update the endpoint
1205 * pointer
1206 */
1207 *inp_p = inp;
1208 SCTP_INP_RUNLOCK(inp);
1209 return (stcb);
1210 }
1211 break;
1212 }
1213 #endif
1214 #ifdef INET6
1215 case AF_INET6:
1216 {
1217 struct sockaddr_in6 *sin6, *rsin6;
1218
1219 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1220 rsin6 = (struct sockaddr_in6 *)from;
1221 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1222 rsin6)) {
1223 /* found it */
1224 if (netp != NULL) {
1225 *netp = net;
1226 }
1227 /*
1228 * Update the endpoint
1229 * pointer
1230 */
1231 *inp_p = inp;
1232 SCTP_INP_RUNLOCK(inp);
1233 return (stcb);
1234 }
1235 break;
1236 }
1237 #endif
1238 default:
1239 /* TSNH */
1240 break;
1241 }
1242 }
1243 SCTP_TCB_UNLOCK(stcb);
1244 SCTP_INP_RUNLOCK(inp);
1245 }
1246 return (NULL);
1247 }
1248
1249 /*
1250 * rules for use
1251 *
1252 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1253 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1254 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1255 * NULL.
1256 */
1257
1258 struct sctp_tcb *
sctp_findassociation_ep_addr(struct sctp_inpcb ** inp_p,struct sockaddr * remote,struct sctp_nets ** netp,struct sockaddr * local,struct sctp_tcb * locked_tcb)1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1260 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1261 {
1262 struct sctpasochead *head;
1263 struct sctp_inpcb *inp;
1264 struct sctp_tcb *stcb = NULL;
1265 struct sctp_nets *net;
1266 uint16_t rport;
1267
1268 inp = *inp_p;
1269 switch (remote->sa_family) {
1270 #ifdef INET
1271 case AF_INET:
1272 rport = (((struct sockaddr_in *)remote)->sin_port);
1273 break;
1274 #endif
1275 #ifdef INET6
1276 case AF_INET6:
1277 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1278 break;
1279 #endif
1280 default:
1281 return (NULL);
1282 }
1283 if (locked_tcb) {
1284 /*
1285 * UN-lock so we can do proper locking here this occurs when
1286 * called from load_addresses_from_init.
1287 */
1288 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1289 SCTP_TCB_UNLOCK(locked_tcb);
1290 }
1291 SCTP_INP_INFO_RLOCK();
1292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1293 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1294 /*-
1295 * Now either this guy is our listener or it's the
1296 * connector. If it is the one that issued the connect, then
1297 * it's only chance is to be the first TCB in the list. If
1298 * it is the acceptor, then do the special_lookup to hash
1299 * and find the real inp.
1300 */
1301 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1302 /* to is peer addr, from is my addr */
1303 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1304 netp, inp->def_vrf_id);
1305 if ((stcb != NULL) && (locked_tcb == NULL)) {
1306 /* we have a locked tcb, lower refcount */
1307 SCTP_INP_DECR_REF(inp);
1308 }
1309 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1310 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1311 SCTP_TCB_LOCK(locked_tcb);
1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1313 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1314 }
1315 SCTP_INP_INFO_RUNLOCK();
1316 return (stcb);
1317 } else {
1318 SCTP_INP_WLOCK(inp);
1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1320 goto null_return;
1321 }
1322 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1323 if (stcb == NULL) {
1324 goto null_return;
1325 }
1326 SCTP_TCB_LOCK(stcb);
1327
1328 if (stcb->rport != rport) {
1329 /* remote port does not match. */
1330 SCTP_TCB_UNLOCK(stcb);
1331 goto null_return;
1332 }
1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334 SCTP_TCB_UNLOCK(stcb);
1335 goto null_return;
1336 }
1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1338 SCTP_TCB_UNLOCK(stcb);
1339 goto null_return;
1340 }
1341 /* now look at the list of remote addresses */
1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1343 #ifdef INVARIANTS
1344 if (net == (TAILQ_NEXT(net, sctp_next))) {
1345 panic("Corrupt net list");
1346 }
1347 #endif
1348 if (net->ro._l_addr.sa.sa_family !=
1349 remote->sa_family) {
1350 /* not the same family */
1351 continue;
1352 }
1353 switch (remote->sa_family) {
1354 #ifdef INET
1355 case AF_INET:
1356 {
1357 struct sockaddr_in *sin,
1358 *rsin;
1359
1360 sin = (struct sockaddr_in *)
1361 &net->ro._l_addr;
1362 rsin = (struct sockaddr_in *)remote;
1363 if (sin->sin_addr.s_addr ==
1364 rsin->sin_addr.s_addr) {
1365 /* found it */
1366 if (netp != NULL) {
1367 *netp = net;
1368 }
1369 if (locked_tcb == NULL) {
1370 SCTP_INP_DECR_REF(inp);
1371 } else if (locked_tcb != stcb) {
1372 SCTP_TCB_LOCK(locked_tcb);
1373 }
1374 if (locked_tcb) {
1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1376 }
1377
1378 SCTP_INP_WUNLOCK(inp);
1379 SCTP_INP_INFO_RUNLOCK();
1380 return (stcb);
1381 }
1382 break;
1383 }
1384 #endif
1385 #ifdef INET6
1386 case AF_INET6:
1387 {
1388 struct sockaddr_in6 *sin6,
1389 *rsin6;
1390
1391 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1392 rsin6 = (struct sockaddr_in6 *)remote;
1393 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1394 rsin6)) {
1395 /* found it */
1396 if (netp != NULL) {
1397 *netp = net;
1398 }
1399 if (locked_tcb == NULL) {
1400 SCTP_INP_DECR_REF(inp);
1401 } else if (locked_tcb != stcb) {
1402 SCTP_TCB_LOCK(locked_tcb);
1403 }
1404 if (locked_tcb) {
1405 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1406 }
1407 SCTP_INP_WUNLOCK(inp);
1408 SCTP_INP_INFO_RUNLOCK();
1409 return (stcb);
1410 }
1411 break;
1412 }
1413 #endif
1414 default:
1415 /* TSNH */
1416 break;
1417 }
1418 }
1419 SCTP_TCB_UNLOCK(stcb);
1420 }
1421 } else {
1422 SCTP_INP_WLOCK(inp);
1423 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1424 goto null_return;
1425 }
1426 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1427 inp->sctp_hashmark)];
1428 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1429 if (stcb->rport != rport) {
1430 /* remote port does not match */
1431 continue;
1432 }
1433 SCTP_TCB_LOCK(stcb);
1434 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1435 SCTP_TCB_UNLOCK(stcb);
1436 continue;
1437 }
1438 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1439 SCTP_TCB_UNLOCK(stcb);
1440 continue;
1441 }
1442 /* now look at the list of remote addresses */
1443 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1444 #ifdef INVARIANTS
1445 if (net == (TAILQ_NEXT(net, sctp_next))) {
1446 panic("Corrupt net list");
1447 }
1448 #endif
1449 if (net->ro._l_addr.sa.sa_family !=
1450 remote->sa_family) {
1451 /* not the same family */
1452 continue;
1453 }
1454 switch (remote->sa_family) {
1455 #ifdef INET
1456 case AF_INET:
1457 {
1458 struct sockaddr_in *sin,
1459 *rsin;
1460
1461 sin = (struct sockaddr_in *)
1462 &net->ro._l_addr;
1463 rsin = (struct sockaddr_in *)remote;
1464 if (sin->sin_addr.s_addr ==
1465 rsin->sin_addr.s_addr) {
1466 /* found it */
1467 if (netp != NULL) {
1468 *netp = net;
1469 }
1470 if (locked_tcb == NULL) {
1471 SCTP_INP_DECR_REF(inp);
1472 } else if (locked_tcb != stcb) {
1473 SCTP_TCB_LOCK(locked_tcb);
1474 }
1475 if (locked_tcb) {
1476 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1477 }
1478 SCTP_INP_WUNLOCK(inp);
1479 SCTP_INP_INFO_RUNLOCK();
1480 return (stcb);
1481 }
1482 break;
1483 }
1484 #endif
1485 #ifdef INET6
1486 case AF_INET6:
1487 {
1488 struct sockaddr_in6 *sin6,
1489 *rsin6;
1490
1491 sin6 = (struct sockaddr_in6 *)
1492 &net->ro._l_addr;
1493 rsin6 = (struct sockaddr_in6 *)remote;
1494 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1495 rsin6)) {
1496 /* found it */
1497 if (netp != NULL) {
1498 *netp = net;
1499 }
1500 if (locked_tcb == NULL) {
1501 SCTP_INP_DECR_REF(inp);
1502 } else if (locked_tcb != stcb) {
1503 SCTP_TCB_LOCK(locked_tcb);
1504 }
1505 if (locked_tcb) {
1506 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1507 }
1508 SCTP_INP_WUNLOCK(inp);
1509 SCTP_INP_INFO_RUNLOCK();
1510 return (stcb);
1511 }
1512 break;
1513 }
1514 #endif
1515 default:
1516 /* TSNH */
1517 break;
1518 }
1519 }
1520 SCTP_TCB_UNLOCK(stcb);
1521 }
1522 }
1523 null_return:
1524 /* clean up for returning null */
1525 if (locked_tcb) {
1526 SCTP_TCB_LOCK(locked_tcb);
1527 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1528 }
1529 SCTP_INP_WUNLOCK(inp);
1530 SCTP_INP_INFO_RUNLOCK();
1531 /* not found */
1532 return (NULL);
1533 }
1534
1535 /*
1536 * Find an association for a specific endpoint using the association id given
1537 * out in the COMM_UP notification
1538 */
1539 struct sctp_tcb *
sctp_findasoc_ep_asocid_locked(struct sctp_inpcb * inp,sctp_assoc_t asoc_id,int want_lock)1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1541 {
1542 /*
1543 * Use my the assoc_id to find a endpoint
1544 */
1545 struct sctpasochead *head;
1546 struct sctp_tcb *stcb;
1547 uint32_t id;
1548
1549 if (inp == NULL) {
1550 SCTP_PRINTF("TSNH ep_associd\n");
1551 return (NULL);
1552 }
1553 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1554 SCTP_PRINTF("TSNH ep_associd0\n");
1555 return (NULL);
1556 }
1557 id = (uint32_t)asoc_id;
1558 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1559 if (head == NULL) {
1560 /* invalid id TSNH */
1561 SCTP_PRINTF("TSNH ep_associd1\n");
1562 return (NULL);
1563 }
1564 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1565 if (stcb->asoc.assoc_id == id) {
1566 if (inp != stcb->sctp_ep) {
1567 /*
1568 * some other guy has the same id active (id
1569 * collision ??).
1570 */
1571 SCTP_PRINTF("TSNH ep_associd2\n");
1572 continue;
1573 }
1574 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1575 continue;
1576 }
1577 if (want_lock) {
1578 SCTP_TCB_LOCK(stcb);
1579 }
1580 return (stcb);
1581 }
1582 }
1583 return (NULL);
1584 }
1585
1586 struct sctp_tcb *
sctp_findassociation_ep_asocid(struct sctp_inpcb * inp,sctp_assoc_t asoc_id,int want_lock)1587 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1588 {
1589 struct sctp_tcb *stcb;
1590
1591 SCTP_INP_RLOCK(inp);
1592 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1593 SCTP_INP_RUNLOCK(inp);
1594 return (stcb);
1595 }
1596
1597 /*
1598 * Endpoint probe expects that the INP_INFO is locked.
1599 */
1600 static struct sctp_inpcb *
sctp_endpoint_probe(struct sockaddr * nam,struct sctppcbhead * head,uint16_t lport,uint32_t vrf_id)1601 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1602 uint16_t lport, uint32_t vrf_id)
1603 {
1604 struct sctp_inpcb *inp;
1605 struct sctp_laddr *laddr;
1606 #ifdef INET
1607 struct sockaddr_in *sin;
1608 #endif
1609 #ifdef INET6
1610 struct sockaddr_in6 *sin6;
1611 struct sockaddr_in6 *intf_addr6;
1612 #endif
1613 int fnd;
1614
1615 #ifdef INET
1616 sin = NULL;
1617 #endif
1618 #ifdef INET6
1619 sin6 = NULL;
1620 #endif
1621 switch (nam->sa_family) {
1622 #ifdef INET
1623 case AF_INET:
1624 sin = (struct sockaddr_in *)nam;
1625 break;
1626 #endif
1627 #ifdef INET6
1628 case AF_INET6:
1629 sin6 = (struct sockaddr_in6 *)nam;
1630 break;
1631 #endif
1632 default:
1633 /* unsupported family */
1634 return (NULL);
1635 }
1636
1637 if (head == NULL)
1638 return (NULL);
1639
1640 LIST_FOREACH(inp, head, sctp_hash) {
1641 SCTP_INP_RLOCK(inp);
1642 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1643 SCTP_INP_RUNLOCK(inp);
1644 continue;
1645 }
1646 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1647 (inp->sctp_lport == lport)) {
1648 /* got it */
1649 switch (nam->sa_family) {
1650 #ifdef INET
1651 case AF_INET:
1652 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1653 SCTP_IPV6_V6ONLY(inp)) {
1654 /*
1655 * IPv4 on a IPv6 socket with ONLY
1656 * IPv6 set
1657 */
1658 SCTP_INP_RUNLOCK(inp);
1659 continue;
1660 }
1661 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1662 &sin->sin_addr) != 0) {
1663 SCTP_INP_RUNLOCK(inp);
1664 continue;
1665 }
1666 break;
1667 #endif
1668 #ifdef INET6
1669 case AF_INET6:
1670 /*
1671 * A V6 address and the endpoint is NOT
1672 * bound V6
1673 */
1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1675 SCTP_INP_RUNLOCK(inp);
1676 continue;
1677 }
1678 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1679 &sin6->sin6_addr) != 0) {
1680 SCTP_INP_RUNLOCK(inp);
1681 continue;
1682 }
1683 break;
1684 #endif
1685 default:
1686 break;
1687 }
1688 /* does a VRF id match? */
1689 fnd = 0;
1690 if (inp->def_vrf_id == vrf_id)
1691 fnd = 1;
1692
1693 SCTP_INP_RUNLOCK(inp);
1694 if (!fnd)
1695 continue;
1696 return (inp);
1697 }
1698 SCTP_INP_RUNLOCK(inp);
1699 }
1700 switch (nam->sa_family) {
1701 #ifdef INET
1702 case AF_INET:
1703 if (sin->sin_addr.s_addr == INADDR_ANY) {
1704 /* Can't hunt for one that has no address specified */
1705 return (NULL);
1706 }
1707 break;
1708 #endif
1709 #ifdef INET6
1710 case AF_INET6:
1711 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1712 /* Can't hunt for one that has no address specified */
1713 return (NULL);
1714 }
1715 break;
1716 #endif
1717 default:
1718 break;
1719 }
1720 /*
1721 * ok, not bound to all so see if we can find a EP bound to this
1722 * address.
1723 */
1724 LIST_FOREACH(inp, head, sctp_hash) {
1725 SCTP_INP_RLOCK(inp);
1726 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1727 SCTP_INP_RUNLOCK(inp);
1728 continue;
1729 }
1730 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1731 SCTP_INP_RUNLOCK(inp);
1732 continue;
1733 }
1734 /*
1735 * Ok this could be a likely candidate, look at all of its
1736 * addresses
1737 */
1738 if (inp->sctp_lport != lport) {
1739 SCTP_INP_RUNLOCK(inp);
1740 continue;
1741 }
1742 /* does a VRF id match? */
1743 fnd = 0;
1744 if (inp->def_vrf_id == vrf_id)
1745 fnd = 1;
1746
1747 if (!fnd) {
1748 SCTP_INP_RUNLOCK(inp);
1749 continue;
1750 }
1751 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1752 if (laddr->ifa == NULL) {
1753 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1754 __func__);
1755 continue;
1756 }
1757 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1758 (void *)laddr->ifa);
1759 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1760 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1761 continue;
1762 }
1763 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1764 /* possible, see if it matches */
1765 switch (nam->sa_family) {
1766 #ifdef INET
1767 case AF_INET:
1768 if (sin->sin_addr.s_addr ==
1769 laddr->ifa->address.sin.sin_addr.s_addr) {
1770 SCTP_INP_RUNLOCK(inp);
1771 return (inp);
1772 }
1773 break;
1774 #endif
1775 #ifdef INET6
1776 case AF_INET6:
1777 intf_addr6 = &laddr->ifa->address.sin6;
1778 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1779 intf_addr6)) {
1780 SCTP_INP_RUNLOCK(inp);
1781 return (inp);
1782 }
1783 break;
1784 #endif
1785 }
1786 }
1787 }
1788 SCTP_INP_RUNLOCK(inp);
1789 }
1790 return (NULL);
1791 }
1792
1793 static struct sctp_inpcb *
sctp_isport_inuse(struct sctp_inpcb * inp,uint16_t lport,uint32_t vrf_id)1794 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1795 {
1796 struct sctppcbhead *head;
1797 struct sctp_inpcb *t_inp;
1798 int fnd;
1799
1800 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1801 SCTP_BASE_INFO(hashmark))];
1802 LIST_FOREACH(t_inp, head, sctp_hash) {
1803 if (t_inp->sctp_lport != lport) {
1804 continue;
1805 }
1806 /* is it in the VRF in question */
1807 fnd = 0;
1808 if (t_inp->def_vrf_id == vrf_id)
1809 fnd = 1;
1810 if (!fnd)
1811 continue;
1812
1813 /* This one is in use. */
1814 /* check the v6/v4 binding issue */
1815 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1816 SCTP_IPV6_V6ONLY(t_inp)) {
1817 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1818 /* collision in V6 space */
1819 return (t_inp);
1820 } else {
1821 /* inp is BOUND_V4 no conflict */
1822 continue;
1823 }
1824 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1825 /* t_inp is bound v4 and v6, conflict always */
1826 return (t_inp);
1827 } else {
1828 /* t_inp is bound only V4 */
1829 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1830 SCTP_IPV6_V6ONLY(inp)) {
1831 /* no conflict */
1832 continue;
1833 }
1834 /* else fall through to conflict */
1835 }
1836 return (t_inp);
1837 }
1838 return (NULL);
1839 }
1840
1841 int
sctp_swap_inpcb_for_listen(struct sctp_inpcb * inp)1842 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1843 {
1844 /* For 1-2-1 with port reuse */
1845 struct sctppcbhead *head;
1846 struct sctp_inpcb *tinp, *ninp;
1847
1848 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1849 /* only works with port reuse on */
1850 return (-1);
1851 }
1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1853 return (0);
1854 }
1855 SCTP_INP_RUNLOCK(inp);
1856 SCTP_INP_INFO_WLOCK();
1857 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1858 SCTP_BASE_INFO(hashmark))];
1859 /* Kick out all non-listeners to the TCP hash */
1860 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1861 if (tinp->sctp_lport != inp->sctp_lport) {
1862 continue;
1863 }
1864 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1865 continue;
1866 }
1867 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1868 continue;
1869 }
1870 if (SCTP_IS_LISTENING(tinp)) {
1871 continue;
1872 }
1873 SCTP_INP_WLOCK(tinp);
1874 LIST_REMOVE(tinp, sctp_hash);
1875 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1876 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1877 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1878 SCTP_INP_WUNLOCK(tinp);
1879 }
1880 SCTP_INP_WLOCK(inp);
1881 /* Pull from where he was */
1882 LIST_REMOVE(inp, sctp_hash);
1883 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1884 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1885 LIST_INSERT_HEAD(head, inp, sctp_hash);
1886 SCTP_INP_WUNLOCK(inp);
1887 SCTP_INP_RLOCK(inp);
1888 SCTP_INP_INFO_WUNLOCK();
1889 return (0);
1890 }
1891
1892 struct sctp_inpcb *
sctp_pcb_findep(struct sockaddr * nam,int find_tcp_pool,int have_lock,uint32_t vrf_id)1893 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1894 uint32_t vrf_id)
1895 {
1896 /*
1897 * First we check the hash table to see if someone has this port
1898 * bound with just the port.
1899 */
1900 struct sctp_inpcb *inp;
1901 struct sctppcbhead *head;
1902 int lport;
1903 unsigned int i;
1904 #ifdef INET
1905 struct sockaddr_in *sin;
1906 #endif
1907 #ifdef INET6
1908 struct sockaddr_in6 *sin6;
1909 #endif
1910
1911 switch (nam->sa_family) {
1912 #ifdef INET
1913 case AF_INET:
1914 sin = (struct sockaddr_in *)nam;
1915 lport = sin->sin_port;
1916 break;
1917 #endif
1918 #ifdef INET6
1919 case AF_INET6:
1920 sin6 = (struct sockaddr_in6 *)nam;
1921 lport = sin6->sin6_port;
1922 break;
1923 #endif
1924 default:
1925 return (NULL);
1926 }
1927 /*
1928 * I could cheat here and just cast to one of the types but we will
1929 * do it right. It also provides the check against an Unsupported
1930 * type too.
1931 */
1932 /* Find the head of the ALLADDR chain */
1933 if (have_lock == 0) {
1934 SCTP_INP_INFO_RLOCK();
1935 }
1936 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1937 SCTP_BASE_INFO(hashmark))];
1938 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1939
1940 /*
1941 * If the TCP model exists it could be that the main listening
1942 * endpoint is gone but there still exists a connected socket for
1943 * this guy. If so we can return the first one that we find. This
1944 * may NOT be the correct one so the caller should be wary on the
1945 * returned INP. Currently the only caller that sets find_tcp_pool
1946 * is in bindx where we are verifying that a user CAN bind the
1947 * address. He either has bound it already, or someone else has, or
1948 * its open to bind, so this is good enough.
1949 */
1950 if (inp == NULL && find_tcp_pool) {
1951 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1952 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1953 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1954 if (inp) {
1955 break;
1956 }
1957 }
1958 }
1959 if (inp) {
1960 SCTP_INP_INCR_REF(inp);
1961 }
1962 if (have_lock == 0) {
1963 SCTP_INP_INFO_RUNLOCK();
1964 }
1965 return (inp);
1966 }
1967
1968 /*
1969 * Find an association for an endpoint with the pointer to whom you want to
1970 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1971 * need to change the *to to some other struct like a mbuf...
1972 */
1973 struct sctp_tcb *
sctp_findassociation_addr_sa(struct sockaddr * from,struct sockaddr * to,struct sctp_inpcb ** inp_p,struct sctp_nets ** netp,int find_tcp_pool,uint32_t vrf_id)1974 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1975 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1976 uint32_t vrf_id)
1977 {
1978 struct sctp_inpcb *inp = NULL;
1979 struct sctp_tcb *stcb;
1980
1981 SCTP_INP_INFO_RLOCK();
1982 if (find_tcp_pool) {
1983 if (inp_p != NULL) {
1984 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1985 vrf_id);
1986 } else {
1987 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1988 vrf_id);
1989 }
1990 if (stcb != NULL) {
1991 SCTP_INP_INFO_RUNLOCK();
1992 return (stcb);
1993 }
1994 }
1995 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1996 if (inp_p != NULL) {
1997 *inp_p = inp;
1998 }
1999 SCTP_INP_INFO_RUNLOCK();
2000 if (inp == NULL) {
2001 return (NULL);
2002 }
2003 /*
2004 * ok, we have an endpoint, now lets find the assoc for it (if any)
2005 * we now place the source address or from in the to of the find
2006 * endpoint call. Since in reality this chain is used from the
2007 * inbound packet side.
2008 */
2009 if (inp_p != NULL) {
2010 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2011 NULL);
2012 } else {
2013 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2014 NULL);
2015 }
2016 return (stcb);
2017 }
2018
2019 /*
2020 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2021 * find all addresses that the sender has specified in any address list. Each
2022 * address will be used to lookup the TCB and see if one exits.
2023 */
2024 static struct sctp_tcb *
sctp_findassociation_special_addr(struct mbuf * m,int offset,struct sctphdr * sh,struct sctp_inpcb ** inp_p,struct sctp_nets ** netp,struct sockaddr * dst)2025 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2026 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2027 struct sockaddr *dst)
2028 {
2029 struct sctp_paramhdr *phdr, param_buf;
2030 #if defined(INET) || defined(INET6)
2031 struct sctp_tcb *stcb;
2032 uint16_t ptype;
2033 #endif
2034 uint16_t plen;
2035 #ifdef INET
2036 struct sockaddr_in sin4;
2037 #endif
2038 #ifdef INET6
2039 struct sockaddr_in6 sin6;
2040 #endif
2041
2042 #ifdef INET
2043 memset(&sin4, 0, sizeof(sin4));
2044 sin4.sin_len = sizeof(sin4);
2045 sin4.sin_family = AF_INET;
2046 sin4.sin_port = sh->src_port;
2047 #endif
2048 #ifdef INET6
2049 memset(&sin6, 0, sizeof(sin6));
2050 sin6.sin6_len = sizeof(sin6);
2051 sin6.sin6_family = AF_INET6;
2052 sin6.sin6_port = sh->src_port;
2053 #endif
2054
2055 offset += sizeof(struct sctp_init_chunk);
2056
2057 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
2058 while (phdr != NULL) {
2059 /* now we must see if we want the parameter */
2060 #if defined(INET) || defined(INET6)
2061 ptype = ntohs(phdr->param_type);
2062 #endif
2063 plen = ntohs(phdr->param_length);
2064 if (plen == 0) {
2065 break;
2066 }
2067 #ifdef INET
2068 if (ptype == SCTP_IPV4_ADDRESS &&
2069 plen == sizeof(struct sctp_ipv4addr_param)) {
2070 /* Get the rest of the address */
2071 struct sctp_ipv4addr_param ip4_param, *p4;
2072
2073 phdr = sctp_get_next_param(m, offset,
2074 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2075 if (phdr == NULL) {
2076 return (NULL);
2077 }
2078 p4 = (struct sctp_ipv4addr_param *)phdr;
2079 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2080 /* look it up */
2081 stcb = sctp_findassociation_ep_addr(inp_p,
2082 (struct sockaddr *)&sin4, netp, dst, NULL);
2083 if (stcb != NULL) {
2084 return (stcb);
2085 }
2086 }
2087 #endif
2088 #ifdef INET6
2089 if (ptype == SCTP_IPV6_ADDRESS &&
2090 plen == sizeof(struct sctp_ipv6addr_param)) {
2091 /* Get the rest of the address */
2092 struct sctp_ipv6addr_param ip6_param, *p6;
2093
2094 phdr = sctp_get_next_param(m, offset,
2095 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2096 if (phdr == NULL) {
2097 return (NULL);
2098 }
2099 p6 = (struct sctp_ipv6addr_param *)phdr;
2100 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2101 /* look it up */
2102 stcb = sctp_findassociation_ep_addr(inp_p,
2103 (struct sockaddr *)&sin6, netp, dst, NULL);
2104 if (stcb != NULL) {
2105 return (stcb);
2106 }
2107 }
2108 #endif
2109 offset += SCTP_SIZE32(plen);
2110 phdr = sctp_get_next_param(m, offset, ¶m_buf,
2111 sizeof(param_buf));
2112 }
2113 return (NULL);
2114 }
2115
2116 static struct sctp_tcb *
sctp_findassoc_by_vtag(struct sockaddr * from,struct sockaddr * to,uint32_t vtag,struct sctp_inpcb ** inp_p,struct sctp_nets ** netp,uint16_t rport,uint16_t lport,int skip_src_check,uint32_t vrf_id,uint32_t remote_tag)2117 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2118 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2119 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2120 {
2121 /*
2122 * Use my vtag to hash. If we find it we then verify the source addr
2123 * is in the assoc. If all goes well we save a bit on rec of a
2124 * packet.
2125 */
2126 struct sctpasochead *head;
2127 struct sctp_nets *net;
2128 struct sctp_tcb *stcb;
2129
2130 SCTP_INP_INFO_RLOCK();
2131 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2132 SCTP_BASE_INFO(hashasocmark))];
2133 LIST_FOREACH(stcb, head, sctp_asocs) {
2134 SCTP_INP_RLOCK(stcb->sctp_ep);
2135 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2136 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2137 continue;
2138 }
2139 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2140 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2141 continue;
2142 }
2143 SCTP_TCB_LOCK(stcb);
2144 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2145 if (stcb->asoc.my_vtag == vtag) {
2146 /* candidate */
2147 if (stcb->rport != rport) {
2148 SCTP_TCB_UNLOCK(stcb);
2149 continue;
2150 }
2151 if (stcb->sctp_ep->sctp_lport != lport) {
2152 SCTP_TCB_UNLOCK(stcb);
2153 continue;
2154 }
2155 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2156 SCTP_TCB_UNLOCK(stcb);
2157 continue;
2158 }
2159 /* RRS:Need toaddr check here */
2160 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2161 /* Endpoint does not own this address */
2162 SCTP_TCB_UNLOCK(stcb);
2163 continue;
2164 }
2165 if (remote_tag) {
2166 /*
2167 * If we have both vtags that's all we match
2168 * on
2169 */
2170 if (stcb->asoc.peer_vtag == remote_tag) {
2171 /*
2172 * If both tags match we consider it
2173 * conclusive and check NO
2174 * source/destination addresses
2175 */
2176 goto conclusive;
2177 }
2178 }
2179 if (skip_src_check) {
2180 conclusive:
2181 if (from) {
2182 *netp = sctp_findnet(stcb, from);
2183 } else {
2184 *netp = NULL; /* unknown */
2185 }
2186 if (inp_p)
2187 *inp_p = stcb->sctp_ep;
2188 SCTP_INP_INFO_RUNLOCK();
2189 return (stcb);
2190 }
2191 net = sctp_findnet(stcb, from);
2192 if (net) {
2193 /* yep its him. */
2194 *netp = net;
2195 SCTP_STAT_INCR(sctps_vtagexpress);
2196 *inp_p = stcb->sctp_ep;
2197 SCTP_INP_INFO_RUNLOCK();
2198 return (stcb);
2199 } else {
2200 /*
2201 * not him, this should only happen in rare
2202 * cases so I peg it.
2203 */
2204 SCTP_STAT_INCR(sctps_vtagbogus);
2205 }
2206 }
2207 SCTP_TCB_UNLOCK(stcb);
2208 }
2209 SCTP_INP_INFO_RUNLOCK();
2210 return (NULL);
2211 }
2212
2213 /*
2214 * Find an association with the pointer to the inbound IP packet. This can be
2215 * a IPv4 or IPv6 packet.
2216 */
2217 struct sctp_tcb *
sctp_findassociation_addr(struct mbuf * m,int offset,struct sockaddr * src,struct sockaddr * dst,struct sctphdr * sh,struct sctp_chunkhdr * ch,struct sctp_inpcb ** inp_p,struct sctp_nets ** netp,uint32_t vrf_id)2218 sctp_findassociation_addr(struct mbuf *m, int offset,
2219 struct sockaddr *src, struct sockaddr *dst,
2220 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2221 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2222 {
2223 struct sctp_tcb *stcb;
2224 struct sctp_inpcb *inp;
2225
2226 if (sh->v_tag) {
2227 /* we only go down this path if vtag is non-zero */
2228 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2229 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2230 if (stcb) {
2231 return (stcb);
2232 }
2233 }
2234
2235 if (inp_p) {
2236 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2237 1, vrf_id);
2238 inp = *inp_p;
2239 } else {
2240 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2241 1, vrf_id);
2242 }
2243 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2244 if (stcb == NULL && inp) {
2245 /* Found a EP but not this address */
2246 if ((ch->chunk_type == SCTP_INITIATION) ||
2247 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2248 /*-
2249 * special hook, we do NOT return linp or an
2250 * association that is linked to an existing
2251 * association that is under the TCP pool (i.e. no
2252 * listener exists). The endpoint finding routine
2253 * will always find a listener before examining the
2254 * TCP pool.
2255 */
2256 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2257 if (inp_p) {
2258 *inp_p = NULL;
2259 }
2260 return (NULL);
2261 }
2262 stcb = sctp_findassociation_special_addr(m,
2263 offset, sh, &inp, netp, dst);
2264 if (inp_p != NULL) {
2265 *inp_p = inp;
2266 }
2267 }
2268 }
2269 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2270 return (stcb);
2271 }
2272
2273 /*
2274 * lookup an association by an ASCONF lookup address.
2275 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2276 */
2277 struct sctp_tcb *
sctp_findassociation_ep_asconf(struct mbuf * m,int offset,struct sockaddr * dst,struct sctphdr * sh,struct sctp_inpcb ** inp_p,struct sctp_nets ** netp,uint32_t vrf_id)2278 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2279 struct sockaddr *dst, struct sctphdr *sh,
2280 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2281 {
2282 struct sctp_tcb *stcb;
2283 union sctp_sockstore remote_store;
2284 struct sctp_paramhdr param_buf, *phdr;
2285 int ptype;
2286 int zero_address = 0;
2287 #ifdef INET
2288 struct sockaddr_in *sin;
2289 #endif
2290 #ifdef INET6
2291 struct sockaddr_in6 *sin6;
2292 #endif
2293
2294 memset(&remote_store, 0, sizeof(remote_store));
2295 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2296 ¶m_buf, sizeof(struct sctp_paramhdr));
2297 if (phdr == NULL) {
2298 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2299 __func__);
2300 return NULL;
2301 }
2302 ptype = (int)((uint32_t)ntohs(phdr->param_type));
2303 /* get the correlation address */
2304 switch (ptype) {
2305 #ifdef INET6
2306 case SCTP_IPV6_ADDRESS:
2307 {
2308 /* ipv6 address param */
2309 struct sctp_ipv6addr_param *p6, p6_buf;
2310
2311 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2312 return NULL;
2313 }
2314 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2315 offset + sizeof(struct sctp_asconf_chunk),
2316 &p6_buf.ph, sizeof(p6_buf));
2317 if (p6 == NULL) {
2318 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2319 __func__);
2320 return (NULL);
2321 }
2322 sin6 = &remote_store.sin6;
2323 sin6->sin6_family = AF_INET6;
2324 sin6->sin6_len = sizeof(*sin6);
2325 sin6->sin6_port = sh->src_port;
2326 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2327 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2328 zero_address = 1;
2329 break;
2330 }
2331 #endif
2332 #ifdef INET
2333 case SCTP_IPV4_ADDRESS:
2334 {
2335 /* ipv4 address param */
2336 struct sctp_ipv4addr_param *p4, p4_buf;
2337
2338 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2339 return NULL;
2340 }
2341 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2342 offset + sizeof(struct sctp_asconf_chunk),
2343 &p4_buf.ph, sizeof(p4_buf));
2344 if (p4 == NULL) {
2345 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2346 __func__);
2347 return (NULL);
2348 }
2349 sin = &remote_store.sin;
2350 sin->sin_family = AF_INET;
2351 sin->sin_len = sizeof(*sin);
2352 sin->sin_port = sh->src_port;
2353 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2354 if (sin->sin_addr.s_addr == INADDR_ANY)
2355 zero_address = 1;
2356 break;
2357 }
2358 #endif
2359 default:
2360 /* invalid address param type */
2361 return NULL;
2362 }
2363
2364 if (zero_address) {
2365 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2366 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2367 if (stcb != NULL) {
2368 SCTP_INP_DECR_REF(*inp_p);
2369 }
2370 } else {
2371 stcb = sctp_findassociation_ep_addr(inp_p,
2372 &remote_store.sa, netp,
2373 dst, NULL);
2374 }
2375 return (stcb);
2376 }
2377
2378 /*
2379 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2380 * addresses. This way if we don't get a bind we by default pick a ephemeral
2381 * port with all addresses bound.
2382 */
2383 int
sctp_inpcb_alloc(struct socket * so,uint32_t vrf_id)2384 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2385 {
2386 /*
2387 * we get called when a new endpoint starts up. We need to allocate
2388 * the sctp_inpcb structure from the zone and init it. Mark it as
2389 * unbound and find a port that we can use as an ephemeral with
2390 * INADDR_ANY. If the user binds later no problem we can then add in
2391 * the specific addresses. And setup the default parameters for the
2392 * EP.
2393 */
2394 int i, error;
2395 struct sctp_inpcb *inp;
2396 struct sctp_pcb *m;
2397 struct timeval time;
2398 sctp_sharedkey_t *null_key;
2399
2400 error = 0;
2401
2402 SCTP_INP_INFO_WLOCK();
2403 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2404 if (inp == NULL) {
2405 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2406 SCTP_INP_INFO_WUNLOCK();
2407 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2408 return (ENOBUFS);
2409 }
2410 /* zap it */
2411 memset(inp, 0, sizeof(*inp));
2412
2413 /* bump generations */
2414 /* setup socket pointers */
2415 inp->sctp_socket = so;
2416 inp->ip_inp.inp.inp_socket = so;
2417 inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2418 #ifdef INET6
2419 if (INP_SOCKAF(so) == AF_INET6) {
2420 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2421 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2422 }
2423 if (MODULE_GLOBAL(ip6_v6only)) {
2424 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2425 }
2426 }
2427 #endif
2428 inp->sctp_associd_counter = 1;
2429 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2430 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2431 inp->max_cwnd = 0;
2432 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2433 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2434 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2435 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2436 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2437 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2438 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2439 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2440 inp->idata_supported = 0;
2441
2442 inp->fibnum = so->so_fibnum;
2443 /* init the small hash table we use to track asocid <-> tcb */
2444 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2445 if (inp->sctp_asocidhash == NULL) {
2446 crfree(inp->ip_inp.inp.inp_cred);
2447 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2448 SCTP_INP_INFO_WUNLOCK();
2449 return (ENOBUFS);
2450 }
2451 SCTP_INCR_EP_COUNT();
2452 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2453 SCTP_INP_INFO_WUNLOCK();
2454
2455 so->so_pcb = (caddr_t)inp;
2456
2457 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2458 /* UDP style socket */
2459 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2460 SCTP_PCB_FLAGS_UNBOUND);
2461 /* Be sure it is NON-BLOCKING IO for UDP */
2462 /* SCTP_SET_SO_NBIO(so); */
2463 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2464 /* TCP style socket */
2465 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2466 SCTP_PCB_FLAGS_UNBOUND);
2467 /* Be sure we have blocking IO by default */
2468 SOCK_LOCK(so);
2469 SCTP_CLEAR_SO_NBIO(so);
2470 SOCK_UNLOCK(so);
2471 } else {
2472 /*
2473 * unsupported socket type (RAW, etc)- in case we missed it
2474 * in protosw
2475 */
2476 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2477 so->so_pcb = NULL;
2478 crfree(inp->ip_inp.inp.inp_cred);
2479 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2480 return (EOPNOTSUPP);
2481 }
2482 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2483 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2484 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2485 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2486 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2487 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2488 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2489 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2490 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2491 }
2492 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2493 &inp->sctp_hashmark);
2494 if (inp->sctp_tcbhash == NULL) {
2495 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2496 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2497 so->so_pcb = NULL;
2498 crfree(inp->ip_inp.inp.inp_cred);
2499 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2500 return (ENOBUFS);
2501 }
2502 inp->def_vrf_id = vrf_id;
2503
2504 SCTP_INP_INFO_WLOCK();
2505 SCTP_INP_LOCK_INIT(inp);
2506 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2507 SCTP_INP_READ_INIT(inp);
2508 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2509 /* lock the new ep */
2510 SCTP_INP_WLOCK(inp);
2511
2512 /* add it to the info area */
2513 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2514 SCTP_INP_INFO_WUNLOCK();
2515
2516 TAILQ_INIT(&inp->read_queue);
2517 LIST_INIT(&inp->sctp_addr_list);
2518
2519 LIST_INIT(&inp->sctp_asoc_list);
2520
2521 #ifdef SCTP_TRACK_FREED_ASOCS
2522 /* TEMP CODE */
2523 LIST_INIT(&inp->sctp_asoc_free_list);
2524 #endif
2525 /* Init the timer structure for signature change */
2526 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2527 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2528
2529 /* now init the actual endpoint default data */
2530 m = &inp->sctp_ep;
2531
2532 /* setup the base timeout information */
2533 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */
2534 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */
2535 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2536 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2537 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2538 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2539 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2540 /* all max/min max are in ms */
2541 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2542 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2543 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2544 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2545 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2546 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2547 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2548 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2549 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2550 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2551 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2552 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2553 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2554
2555 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2556 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2557 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2558 /* number of streams to pre-open on a association */
2559 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2560
2561 m->default_mtu = 0;
2562 /* Add adaptation cookie */
2563 m->adaptation_layer_indicator = 0;
2564 m->adaptation_layer_indicator_provided = 0;
2565
2566 /* seed random number generator */
2567 m->random_counter = 1;
2568 m->store_at = SCTP_SIGNATURE_SIZE;
2569 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2570 sctp_fill_random_store(m);
2571
2572 /* Minimum cookie size */
2573 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2574 sizeof(struct sctp_state_cookie);
2575 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2576
2577 /* Setup the initial secret */
2578 (void)SCTP_GETTIME_TIMEVAL(&time);
2579 m->time_of_secret_change = time.tv_sec;
2580
2581 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2582 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2583 }
2584 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2585
2586 /* How long is a cookie good for ? */
2587 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2588 /*
2589 * Initialize authentication parameters
2590 */
2591 m->local_hmacs = sctp_default_supported_hmaclist();
2592 m->local_auth_chunks = sctp_alloc_chunklist();
2593 if (inp->asconf_supported) {
2594 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2595 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2596 }
2597 m->default_dscp = 0;
2598 #ifdef INET6
2599 m->default_flowlabel = 0;
2600 #endif
2601 m->port = 0; /* encapsulation disabled by default */
2602 LIST_INIT(&m->shared_keys);
2603 /* add default NULL key as key id 0 */
2604 null_key = sctp_alloc_sharedkey();
2605 sctp_insert_sharedkey(&m->shared_keys, null_key);
2606 SCTP_INP_WUNLOCK(inp);
2607 #ifdef SCTP_LOG_CLOSING
2608 sctp_log_closing(inp, NULL, 12);
2609 #endif
2610 return (error);
2611 }
2612
2613 void
sctp_move_pcb_and_assoc(struct sctp_inpcb * old_inp,struct sctp_inpcb * new_inp,struct sctp_tcb * stcb)2614 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2615 struct sctp_tcb *stcb)
2616 {
2617 struct sctp_nets *net;
2618 uint16_t lport, rport;
2619 struct sctppcbhead *head;
2620 struct sctp_laddr *laddr, *oladdr;
2621
2622 atomic_add_int(&stcb->asoc.refcnt, 1);
2623 SCTP_TCB_UNLOCK(stcb);
2624 SCTP_INP_INFO_WLOCK();
2625 SCTP_INP_WLOCK(old_inp);
2626 SCTP_INP_WLOCK(new_inp);
2627 SCTP_TCB_LOCK(stcb);
2628 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2629
2630 new_inp->sctp_ep.time_of_secret_change =
2631 old_inp->sctp_ep.time_of_secret_change;
2632 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2633 sizeof(old_inp->sctp_ep.secret_key));
2634 new_inp->sctp_ep.current_secret_number =
2635 old_inp->sctp_ep.current_secret_number;
2636 new_inp->sctp_ep.last_secret_number =
2637 old_inp->sctp_ep.last_secret_number;
2638 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2639
2640 /* make it so new data pours into the new socket */
2641 stcb->sctp_socket = new_inp->sctp_socket;
2642 stcb->sctp_ep = new_inp;
2643
2644 /* Copy the port across */
2645 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2646 rport = stcb->rport;
2647 /* Pull the tcb from the old association */
2648 LIST_REMOVE(stcb, sctp_tcbhash);
2649 LIST_REMOVE(stcb, sctp_tcblist);
2650 if (stcb->asoc.in_asocid_hash) {
2651 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2652 }
2653 /* Now insert the new_inp into the TCP connected hash */
2654 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2655
2656 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2657 /* Its safe to access */
2658 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2659
2660 /* Now move the tcb into the endpoint list */
2661 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2662 /*
2663 * Question, do we even need to worry about the ep-hash since we
2664 * only have one connection? Probably not :> so lets get rid of it
2665 * and not suck up any kernel memory in that.
2666 */
2667 if (stcb->asoc.in_asocid_hash) {
2668 struct sctpasochead *lhd;
2669
2670 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2671 new_inp->hashasocidmark)];
2672 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2673 }
2674 /* Ok. Let's restart timer. */
2675 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2676 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2677 stcb, net);
2678 }
2679
2680 SCTP_INP_INFO_WUNLOCK();
2681 if (new_inp->sctp_tcbhash != NULL) {
2682 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2683 new_inp->sctp_tcbhash = NULL;
2684 }
2685 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2686 /* Subset bound, so copy in the laddr list from the old_inp */
2687 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2688 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2689 if (laddr == NULL) {
2690 /*
2691 * Gak, what can we do? This assoc is really
2692 * HOSED. We probably should send an abort
2693 * here.
2694 */
2695 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2696 continue;
2697 }
2698 SCTP_INCR_LADDR_COUNT();
2699 memset(laddr, 0, sizeof(*laddr));
2700 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2701 laddr->ifa = oladdr->ifa;
2702 atomic_add_int(&laddr->ifa->refcount, 1);
2703 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2704 sctp_nxt_addr);
2705 new_inp->laddr_count++;
2706 if (oladdr == stcb->asoc.last_used_address) {
2707 stcb->asoc.last_used_address = laddr;
2708 }
2709 }
2710 }
2711 /* Now any running timers need to be adjusted. */
2712 if (stcb->asoc.dack_timer.ep == old_inp) {
2713 SCTP_INP_DECR_REF(old_inp);
2714 stcb->asoc.dack_timer.ep = new_inp;
2715 SCTP_INP_INCR_REF(new_inp);
2716 }
2717 if (stcb->asoc.asconf_timer.ep == old_inp) {
2718 SCTP_INP_DECR_REF(old_inp);
2719 stcb->asoc.asconf_timer.ep = new_inp;
2720 SCTP_INP_INCR_REF(new_inp);
2721 }
2722 if (stcb->asoc.strreset_timer.ep == old_inp) {
2723 SCTP_INP_DECR_REF(old_inp);
2724 stcb->asoc.strreset_timer.ep = new_inp;
2725 SCTP_INP_INCR_REF(new_inp);
2726 }
2727 if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2728 SCTP_INP_DECR_REF(old_inp);
2729 stcb->asoc.shut_guard_timer.ep = new_inp;
2730 SCTP_INP_INCR_REF(new_inp);
2731 }
2732 if (stcb->asoc.autoclose_timer.ep == old_inp) {
2733 SCTP_INP_DECR_REF(old_inp);
2734 stcb->asoc.autoclose_timer.ep = new_inp;
2735 SCTP_INP_INCR_REF(new_inp);
2736 }
2737 if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2738 SCTP_INP_DECR_REF(old_inp);
2739 stcb->asoc.delete_prim_timer.ep = new_inp;
2740 SCTP_INP_INCR_REF(new_inp);
2741 }
2742 /* now what about the nets? */
2743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2744 if (net->pmtu_timer.ep == old_inp) {
2745 SCTP_INP_DECR_REF(old_inp);
2746 net->pmtu_timer.ep = new_inp;
2747 SCTP_INP_INCR_REF(new_inp);
2748 }
2749 if (net->hb_timer.ep == old_inp) {
2750 SCTP_INP_DECR_REF(old_inp);
2751 net->hb_timer.ep = new_inp;
2752 SCTP_INP_INCR_REF(new_inp);
2753 }
2754 if (net->rxt_timer.ep == old_inp) {
2755 SCTP_INP_DECR_REF(old_inp);
2756 net->rxt_timer.ep = new_inp;
2757 SCTP_INP_INCR_REF(new_inp);
2758 }
2759 }
2760 SCTP_INP_WUNLOCK(new_inp);
2761 SCTP_INP_WUNLOCK(old_inp);
2762 }
2763
2764 /*
2765 * insert an laddr entry with the given ifa for the desired list
2766 */
2767 static int
sctp_insert_laddr(struct sctpladdr * list,struct sctp_ifa * ifa,uint32_t act)2768 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2769 {
2770 struct sctp_laddr *laddr;
2771
2772 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2773 if (laddr == NULL) {
2774 /* out of memory? */
2775 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2776 return (EINVAL);
2777 }
2778 SCTP_INCR_LADDR_COUNT();
2779 memset(laddr, 0, sizeof(*laddr));
2780 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2781 laddr->ifa = ifa;
2782 laddr->action = act;
2783 atomic_add_int(&ifa->refcount, 1);
2784 /* insert it */
2785 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2786
2787 return (0);
2788 }
2789
2790 /*
2791 * Remove an laddr entry from the local address list (on an assoc)
2792 */
2793 static void
sctp_remove_laddr(struct sctp_laddr * laddr)2794 sctp_remove_laddr(struct sctp_laddr *laddr)
2795 {
2796
2797 /* remove from the list */
2798 LIST_REMOVE(laddr, sctp_nxt_addr);
2799 sctp_free_ifa(laddr->ifa);
2800 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2801 SCTP_DECR_LADDR_COUNT();
2802 }
2803
2804 /* sctp_ifap is used to bypass normal local address validation checks */
2805 int
sctp_inpcb_bind(struct socket * so,struct sockaddr * addr,struct sctp_ifa * sctp_ifap,struct thread * p)2806 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2807 struct sctp_ifa *sctp_ifap, struct thread *p)
2808 {
2809 /* bind a ep to a socket address */
2810 struct sctppcbhead *head;
2811 struct sctp_inpcb *inp, *inp_tmp;
2812 struct inpcb *ip_inp;
2813 int port_reuse_active = 0;
2814 int bindall;
2815 uint16_t lport;
2816 int error;
2817 uint32_t vrf_id;
2818
2819 lport = 0;
2820 bindall = 1;
2821 inp = (struct sctp_inpcb *)so->so_pcb;
2822 ip_inp = (struct inpcb *)so->so_pcb;
2823 #ifdef SCTP_DEBUG
2824 if (addr) {
2825 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2826 ntohs(((struct sockaddr_in *)addr)->sin_port));
2827 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2828 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2829 }
2830 #endif
2831 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2832 /* already did a bind, subsequent binds NOT allowed ! */
2833 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2834 return (EINVAL);
2835 }
2836 #ifdef INVARIANTS
2837 if (p == NULL)
2838 panic("null proc/thread");
2839 #endif
2840 if (addr != NULL) {
2841 switch (addr->sa_family) {
2842 #ifdef INET
2843 case AF_INET:
2844 {
2845 struct sockaddr_in *sin;
2846
2847 /* IPV6_V6ONLY socket? */
2848 if (SCTP_IPV6_V6ONLY(inp)) {
2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2850 return (EINVAL);
2851 }
2852 if (addr->sa_len != sizeof(*sin)) {
2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2854 return (EINVAL);
2855 }
2856
2857 sin = (struct sockaddr_in *)addr;
2858 lport = sin->sin_port;
2859 /*
2860 * For LOOPBACK the prison_local_ip4() call
2861 * will transmute the ip address to the
2862 * proper value.
2863 */
2864 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2866 return (error);
2867 }
2868 if (sin->sin_addr.s_addr != INADDR_ANY) {
2869 bindall = 0;
2870 }
2871 break;
2872 }
2873 #endif
2874 #ifdef INET6
2875 case AF_INET6:
2876 {
2877 /*
2878 * Only for pure IPv6 Address. (No IPv4
2879 * Mapped!)
2880 */
2881 struct sockaddr_in6 *sin6;
2882
2883 sin6 = (struct sockaddr_in6 *)addr;
2884
2885 if (addr->sa_len != sizeof(*sin6)) {
2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887 return (EINVAL);
2888 }
2889 lport = sin6->sin6_port;
2890 /*
2891 * For LOOPBACK the prison_local_ip6() call
2892 * will transmute the ipv6 address to the
2893 * proper value.
2894 */
2895 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2896 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2898 return (error);
2899 }
2900 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2901 bindall = 0;
2902 /* KAME hack: embed scopeid */
2903 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2905 return (EINVAL);
2906 }
2907 }
2908 /* this must be cleared for ifa_ifwithaddr() */
2909 sin6->sin6_scope_id = 0;
2910 break;
2911 }
2912 #endif
2913 default:
2914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2915 return (EAFNOSUPPORT);
2916 }
2917 }
2918 SCTP_INP_INFO_WLOCK();
2919 SCTP_INP_WLOCK(inp);
2920 /* Setup a vrf_id to be the default for the non-bind-all case. */
2921 vrf_id = inp->def_vrf_id;
2922
2923 /* increase our count due to the unlock we do */
2924 SCTP_INP_INCR_REF(inp);
2925 if (lport) {
2926 /*
2927 * Did the caller specify a port? if so we must see if an ep
2928 * already has this one bound.
2929 */
2930 /* got to be root to get at low ports */
2931 if (ntohs(lport) < IPPORT_RESERVED) {
2932 if ((p != NULL) && ((error =
2933 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2934 ) != 0)) {
2935 SCTP_INP_DECR_REF(inp);
2936 SCTP_INP_WUNLOCK(inp);
2937 SCTP_INP_INFO_WUNLOCK();
2938 return (error);
2939 }
2940 }
2941 SCTP_INP_WUNLOCK(inp);
2942 if (bindall) {
2943 vrf_id = inp->def_vrf_id;
2944 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2945 if (inp_tmp != NULL) {
2946 /*
2947 * lock guy returned and lower count note
2948 * that we are not bound so inp_tmp should
2949 * NEVER be inp. And it is this inp
2950 * (inp_tmp) that gets the reference bump,
2951 * so we must lower it.
2952 */
2953 SCTP_INP_DECR_REF(inp_tmp);
2954 /* unlock info */
2955 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2956 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2957 /*
2958 * Ok, must be one-2-one and
2959 * allowing port re-use
2960 */
2961 port_reuse_active = 1;
2962 goto continue_anyway;
2963 }
2964 SCTP_INP_DECR_REF(inp);
2965 SCTP_INP_INFO_WUNLOCK();
2966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2967 return (EADDRINUSE);
2968 }
2969 } else {
2970 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2971 if (inp_tmp != NULL) {
2972 /*
2973 * lock guy returned and lower count note
2974 * that we are not bound so inp_tmp should
2975 * NEVER be inp. And it is this inp
2976 * (inp_tmp) that gets the reference bump,
2977 * so we must lower it.
2978 */
2979 SCTP_INP_DECR_REF(inp_tmp);
2980 /* unlock info */
2981 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2982 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2983 /*
2984 * Ok, must be one-2-one and
2985 * allowing port re-use
2986 */
2987 port_reuse_active = 1;
2988 goto continue_anyway;
2989 }
2990 SCTP_INP_DECR_REF(inp);
2991 SCTP_INP_INFO_WUNLOCK();
2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2993 return (EADDRINUSE);
2994 }
2995 }
2996 continue_anyway:
2997 SCTP_INP_WLOCK(inp);
2998 if (bindall) {
2999 /* verify that no lport is not used by a singleton */
3000 if ((port_reuse_active == 0) &&
3001 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3002 /* Sorry someone already has this one bound */
3003 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3004 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3005 port_reuse_active = 1;
3006 } else {
3007 SCTP_INP_DECR_REF(inp);
3008 SCTP_INP_WUNLOCK(inp);
3009 SCTP_INP_INFO_WUNLOCK();
3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3011 return (EADDRINUSE);
3012 }
3013 }
3014 }
3015 } else {
3016 uint16_t first, last, candidate;
3017 uint16_t count;
3018 int done;
3019
3020 if (ip_inp->inp_flags & INP_HIGHPORT) {
3021 first = MODULE_GLOBAL(ipport_hifirstauto);
3022 last = MODULE_GLOBAL(ipport_hilastauto);
3023 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3024 if (p && (error =
3025 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3026 )) {
3027 SCTP_INP_DECR_REF(inp);
3028 SCTP_INP_WUNLOCK(inp);
3029 SCTP_INP_INFO_WUNLOCK();
3030 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3031 return (error);
3032 }
3033 first = MODULE_GLOBAL(ipport_lowfirstauto);
3034 last = MODULE_GLOBAL(ipport_lowlastauto);
3035 } else {
3036 first = MODULE_GLOBAL(ipport_firstauto);
3037 last = MODULE_GLOBAL(ipport_lastauto);
3038 }
3039 if (first > last) {
3040 uint16_t temp;
3041
3042 temp = first;
3043 first = last;
3044 last = temp;
3045 }
3046 count = last - first + 1; /* number of candidates */
3047 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3048
3049 done = 0;
3050 while (!done) {
3051 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3052 done = 1;
3053 }
3054 if (!done) {
3055 if (--count == 0) {
3056 SCTP_INP_DECR_REF(inp);
3057 SCTP_INP_WUNLOCK(inp);
3058 SCTP_INP_INFO_WUNLOCK();
3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3060 return (EADDRINUSE);
3061 }
3062 if (candidate == last)
3063 candidate = first;
3064 else
3065 candidate = candidate + 1;
3066 }
3067 }
3068 lport = htons(candidate);
3069 }
3070 SCTP_INP_DECR_REF(inp);
3071 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3072 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3073 /*
3074 * this really should not happen. The guy did a non-blocking
3075 * bind and then did a close at the same time.
3076 */
3077 SCTP_INP_WUNLOCK(inp);
3078 SCTP_INP_INFO_WUNLOCK();
3079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3080 return (EINVAL);
3081 }
3082 /* ok we look clear to give out this port, so lets setup the binding */
3083 if (bindall) {
3084 /* binding to all addresses, so just set in the proper flags */
3085 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3086 /* set the automatic addr changes from kernel flag */
3087 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3089 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3090 } else {
3091 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3093 }
3094 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3095 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096 } else {
3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3098 }
3099 /*
3100 * set the automatic mobility_base from kernel flag (by
3101 * micchie)
3102 */
3103 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106 } else {
3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109 }
3110 /*
3111 * set the automatic mobility_fasthandoff from kernel flag
3112 * (by micchie)
3113 */
3114 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3116 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117 } else {
3118 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3120 }
3121 } else {
3122 /*
3123 * bind specific, make sure flags is off and add a new
3124 * address structure to the sctp_addr_list inside the ep
3125 * structure.
3126 *
3127 * We will need to allocate one and insert it at the head.
3128 * The socketopt call can just insert new addresses in there
3129 * as well. It will also have to do the embed scope kame
3130 * hack too (before adding).
3131 */
3132 struct sctp_ifa *ifa;
3133 union sctp_sockstore store;
3134
3135 memset(&store, 0, sizeof(store));
3136 switch (addr->sa_family) {
3137 #ifdef INET
3138 case AF_INET:
3139 memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3140 store.sin.sin_port = 0;
3141 break;
3142 #endif
3143 #ifdef INET6
3144 case AF_INET6:
3145 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3146 store.sin6.sin6_port = 0;
3147 break;
3148 #endif
3149 default:
3150 break;
3151 }
3152 /*
3153 * first find the interface with the bound address need to
3154 * zero out the port to find the address! yuck! can't do
3155 * this earlier since need port for sctp_pcb_findep()
3156 */
3157 if (sctp_ifap != NULL) {
3158 ifa = sctp_ifap;
3159 } else {
3160 /*
3161 * Note for BSD we hit here always other O/S's will
3162 * pass things in via the sctp_ifap argument.
3163 */
3164 ifa = sctp_find_ifa_by_addr(&store.sa,
3165 vrf_id, SCTP_ADDR_NOT_LOCKED);
3166 }
3167 if (ifa == NULL) {
3168 /* Can't find an interface with that address */
3169 SCTP_INP_WUNLOCK(inp);
3170 SCTP_INP_INFO_WUNLOCK();
3171 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3172 return (EADDRNOTAVAIL);
3173 }
3174 #ifdef INET6
3175 if (addr->sa_family == AF_INET6) {
3176 /* GAK, more FIXME IFA lock? */
3177 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3178 /* Can't bind a non-existent addr. */
3179 SCTP_INP_WUNLOCK(inp);
3180 SCTP_INP_INFO_WUNLOCK();
3181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3182 return (EINVAL);
3183 }
3184 }
3185 #endif
3186 /* we're not bound all */
3187 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3188 /* allow bindx() to send ASCONF's for binding changes */
3189 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3190 /* clear automatic addr changes from kernel flag */
3191 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3192
3193 /* add this address to the endpoint list */
3194 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3195 if (error != 0) {
3196 SCTP_INP_WUNLOCK(inp);
3197 SCTP_INP_INFO_WUNLOCK();
3198 return (error);
3199 }
3200 inp->laddr_count++;
3201 }
3202 /* find the bucket */
3203 if (port_reuse_active) {
3204 /* Put it into tcp 1-2-1 hash */
3205 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3206 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3207 } else {
3208 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3209 }
3210 /* put it in the bucket */
3211 LIST_INSERT_HEAD(head, inp, sctp_hash);
3212 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3213 (void *)head, ntohs(lport), port_reuse_active);
3214 /* set in the port */
3215 inp->sctp_lport = lport;
3216
3217 /* turn off just the unbound flag */
3218 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3219 SCTP_INP_WUNLOCK(inp);
3220 SCTP_INP_INFO_WUNLOCK();
3221 return (0);
3222 }
3223
3224 static void
sctp_iterator_inp_being_freed(struct sctp_inpcb * inp)3225 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3226 {
3227 struct sctp_iterator *it, *nit;
3228
3229 /*
3230 * We enter with the only the ITERATOR_LOCK in place and a write
3231 * lock on the inp_info stuff.
3232 */
3233 it = sctp_it_ctl.cur_it;
3234 if (it && (it->vn != curvnet)) {
3235 /* Its not looking at our VNET */
3236 return;
3237 }
3238 if (it && (it->inp == inp)) {
3239 /*
3240 * This is tricky and we hold the iterator lock, but when it
3241 * returns and gets the lock (when we release it) the
3242 * iterator will try to operate on inp. We need to stop that
3243 * from happening. But of course the iterator has a
3244 * reference on the stcb and inp. We can mark it and it will
3245 * stop.
3246 *
3247 * If its a single iterator situation, we set the end
3248 * iterator flag. Otherwise we set the iterator to go to the
3249 * next inp.
3250 *
3251 */
3252 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3253 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3254 } else {
3255 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3256 }
3257 }
3258 /*
3259 * Now go through and remove any single reference to our inp that
3260 * may be still pending on the list
3261 */
3262 SCTP_IPI_ITERATOR_WQ_LOCK();
3263 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3264 if (it->vn != curvnet) {
3265 continue;
3266 }
3267 if (it->inp == inp) {
3268 /* This one points to me is it inp specific? */
3269 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3270 /* Remove and free this one */
3271 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3272 it, sctp_nxt_itr);
3273 if (it->function_atend != NULL) {
3274 (*it->function_atend) (it->pointer, it->val);
3275 }
3276 SCTP_FREE(it, SCTP_M_ITER);
3277 } else {
3278 it->inp = LIST_NEXT(it->inp, sctp_list);
3279 if (it->inp) {
3280 SCTP_INP_INCR_REF(it->inp);
3281 }
3282 }
3283 /*
3284 * When its put in the refcnt is incremented so decr
3285 * it
3286 */
3287 SCTP_INP_DECR_REF(inp);
3288 }
3289 }
3290 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3291 }
3292
3293 /* release sctp_inpcb unbind the port */
3294 void
sctp_inpcb_free(struct sctp_inpcb * inp,int immediate,int from)3295 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3296 {
3297 /*
3298 * Here we free a endpoint. We must find it (if it is in the Hash
3299 * table) and remove it from there. Then we must also find it in the
3300 * overall list and remove it from there. After all removals are
3301 * complete then any timer has to be stopped. Then start the actual
3302 * freeing. a) Any local lists. b) Any associations. c) The hash of
3303 * all associations. d) finally the ep itself.
3304 */
3305 struct sctp_tcb *asoc, *nasoc;
3306 struct sctp_laddr *laddr, *nladdr;
3307 struct inpcb *ip_pcb;
3308 struct socket *so;
3309 int being_refed = 0;
3310 struct sctp_queued_to_read *sq, *nsq;
3311 int cnt;
3312 sctp_sharedkey_t *shared_key, *nshared_key;
3313
3314 #ifdef SCTP_LOG_CLOSING
3315 sctp_log_closing(inp, NULL, 0);
3316 #endif
3317 SCTP_ITERATOR_LOCK();
3318 /* mark any iterators on the list or being processed */
3319 sctp_iterator_inp_being_freed(inp);
3320 SCTP_ITERATOR_UNLOCK();
3321 so = inp->sctp_socket;
3322 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3323 /* been here before.. eeks.. get out of here */
3324 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3325 #ifdef SCTP_LOG_CLOSING
3326 sctp_log_closing(inp, NULL, 1);
3327 #endif
3328 return;
3329 }
3330 SCTP_ASOC_CREATE_LOCK(inp);
3331 SCTP_INP_INFO_WLOCK();
3332
3333 SCTP_INP_WLOCK(inp);
3334 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3335 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3336 /* socket is gone, so no more wakeups allowed */
3337 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3340 }
3341 /* First time through we have the socket lock, after that no more. */
3342 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3343 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3344
3345 if (inp->control) {
3346 sctp_m_freem(inp->control);
3347 inp->control = NULL;
3348 }
3349 if (inp->pkt) {
3350 sctp_m_freem(inp->pkt);
3351 inp->pkt = NULL;
3352 }
3353 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3354 * here but I will be nice :> (i.e.
3355 * ip_pcb = ep;) */
3356 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3357 int cnt_in_sd;
3358
3359 cnt_in_sd = 0;
3360 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3361 SCTP_TCB_LOCK(asoc);
3362 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3363 /* Skip guys being freed */
3364 cnt_in_sd++;
3365 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3366 /*
3367 * Special case - we did not start a
3368 * kill timer on the asoc due to it
3369 * was not closed. So go ahead and
3370 * start it now.
3371 */
3372 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3373 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3374 }
3375 SCTP_TCB_UNLOCK(asoc);
3376 continue;
3377 }
3378 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3379 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3380 (asoc->asoc.total_output_queue_size == 0)) {
3381 /*
3382 * If we have data in queue, we don't want
3383 * to just free since the app may have done,
3384 * send()/close or connect/send/close. And
3385 * it wants the data to get across first.
3386 */
3387 /* Just abandon things in the front states */
3388 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3389 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3390 cnt_in_sd++;
3391 }
3392 continue;
3393 }
3394 /* Disconnect the socket please */
3395 asoc->sctp_socket = NULL;
3396 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3397 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3398 (asoc->asoc.control_pdapi) ||
3399 (asoc->asoc.size_on_all_streams > 0) ||
3400 (so && (so->so_rcv.sb_cc > 0))) {
3401 /* Left with Data unread */
3402 struct mbuf *op_err;
3403
3404 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3405 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3406 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3407 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3408 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3409 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3410 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3411 }
3412 if (sctp_free_assoc(inp, asoc,
3413 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3414 cnt_in_sd++;
3415 }
3416 continue;
3417 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3418 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3419 (asoc->asoc.stream_queue_cnt == 0)) {
3420 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3421 goto abort_anyway;
3422 }
3423 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3424 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3425 struct sctp_nets *netp;
3426
3427 /*
3428 * there is nothing queued to send,
3429 * so I send shutdown
3430 */
3431 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3432 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3433 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3434 }
3435 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3436 sctp_stop_timers_for_shutdown(asoc);
3437 if (asoc->asoc.alternate) {
3438 netp = asoc->asoc.alternate;
3439 } else {
3440 netp = asoc->asoc.primary_destination;
3441 }
3442 sctp_send_shutdown(asoc, netp);
3443 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3444 netp);
3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3446 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3447 }
3448 } else {
3449 /* mark into shutdown pending */
3450 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3451 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3452 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3453 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3454 }
3455 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3456 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3457 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3458 struct mbuf *op_err;
3459
3460 abort_anyway:
3461 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3462 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3463 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3464 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3465 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3466 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3467 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3468 }
3469 if (sctp_free_assoc(inp, asoc,
3470 SCTP_PCBFREE_NOFORCE,
3471 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3472 cnt_in_sd++;
3473 }
3474 continue;
3475 } else {
3476 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3477 }
3478 }
3479 cnt_in_sd++;
3480 SCTP_TCB_UNLOCK(asoc);
3481 }
3482 /* now is there some left in our SHUTDOWN state? */
3483 if (cnt_in_sd) {
3484 #ifdef SCTP_LOG_CLOSING
3485 sctp_log_closing(inp, NULL, 2);
3486 #endif
3487 inp->sctp_socket = NULL;
3488 SCTP_INP_WUNLOCK(inp);
3489 SCTP_ASOC_CREATE_UNLOCK(inp);
3490 SCTP_INP_INFO_WUNLOCK();
3491 return;
3492 }
3493 }
3494 inp->sctp_socket = NULL;
3495 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3496 SCTP_PCB_FLAGS_UNBOUND) {
3497 /*
3498 * ok, this guy has been bound. It's port is somewhere in
3499 * the SCTP_BASE_INFO(hash table). Remove it!
3500 */
3501 LIST_REMOVE(inp, sctp_hash);
3502 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3503 }
3504
3505 /*
3506 * If there is a timer running to kill us, forget it, since it may
3507 * have a contest on the INP lock.. which would cause us to die ...
3508 */
3509 cnt = 0;
3510 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3511 SCTP_TCB_LOCK(asoc);
3512 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3513 /* Disconnect the socket please */
3514 asoc->sctp_socket = NULL;
3515 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3516 }
3517 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3518 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3519 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3520 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3521 }
3522 cnt++;
3523 SCTP_TCB_UNLOCK(asoc);
3524 continue;
3525 }
3526 /* Free associations that are NOT killing us */
3527 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3528 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3529 struct mbuf *op_err;
3530
3531 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3532 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3533 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3534 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3535 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3536 cnt++;
3537 SCTP_TCB_UNLOCK(asoc);
3538 continue;
3539 }
3540 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3541 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3542 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3543 }
3544 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3545 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3546 cnt++;
3547 }
3548 }
3549 if (cnt) {
3550 /* Ok we have someone out there that will kill us */
3551 #ifdef SCTP_LOG_CLOSING
3552 sctp_log_closing(inp, NULL, 3);
3553 #endif
3554 SCTP_INP_WUNLOCK(inp);
3555 SCTP_ASOC_CREATE_UNLOCK(inp);
3556 SCTP_INP_INFO_WUNLOCK();
3557 return;
3558 }
3559 if (SCTP_INP_LOCK_CONTENDED(inp))
3560 being_refed++;
3561 if (SCTP_INP_READ_CONTENDED(inp))
3562 being_refed++;
3563 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3564 being_refed++;
3565 /* NOTE: 0 refcount also means no timers are referencing us. */
3566 if ((inp->refcount) ||
3567 (being_refed) ||
3568 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3569 #ifdef SCTP_LOG_CLOSING
3570 sctp_log_closing(inp, NULL, 4);
3571 #endif
3572 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3573 SCTP_INP_WUNLOCK(inp);
3574 SCTP_ASOC_CREATE_UNLOCK(inp);
3575 SCTP_INP_INFO_WUNLOCK();
3576 return;
3577 }
3578 inp->sctp_ep.signature_change.type = 0;
3579 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3580 /*
3581 * Remove it from the list .. last thing we need a lock for.
3582 */
3583 LIST_REMOVE(inp, sctp_list);
3584 SCTP_INP_WUNLOCK(inp);
3585 SCTP_ASOC_CREATE_UNLOCK(inp);
3586 SCTP_INP_INFO_WUNLOCK();
3587
3588 #ifdef SCTP_LOG_CLOSING
3589 sctp_log_closing(inp, NULL, 5);
3590 #endif
3591 if ((inp->sctp_asocidhash) != NULL) {
3592 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3593 inp->sctp_asocidhash = NULL;
3594 }
3595 /* sa_ignore FREED_MEMORY */
3596 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3597 /* Its only abandoned if it had data left */
3598 if (sq->length)
3599 SCTP_STAT_INCR(sctps_left_abandon);
3600
3601 TAILQ_REMOVE(&inp->read_queue, sq, next);
3602 sctp_free_remote_addr(sq->whoFrom);
3603 if (so)
3604 so->so_rcv.sb_cc -= sq->length;
3605 if (sq->data) {
3606 sctp_m_freem(sq->data);
3607 sq->data = NULL;
3608 }
3609 /*
3610 * no need to free the net count, since at this point all
3611 * assoc's are gone.
3612 */
3613 sctp_free_a_readq(NULL, sq);
3614 }
3615 /* Now the sctp_pcb things */
3616 /*
3617 * free each asoc if it is not already closed/free. we can't use the
3618 * macro here since le_next will get freed as part of the
3619 * sctp_free_assoc() call.
3620 */
3621 if (ip_pcb->inp_options) {
3622 (void)sctp_m_free(ip_pcb->inp_options);
3623 ip_pcb->inp_options = 0;
3624 }
3625 #ifdef INET6
3626 if (ip_pcb->inp_vflag & INP_IPV6) {
3627 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3628 }
3629 #endif /* INET6 */
3630 ip_pcb->inp_vflag = 0;
3631 /* free up authentication fields */
3632 if (inp->sctp_ep.local_auth_chunks != NULL)
3633 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3634 if (inp->sctp_ep.local_hmacs != NULL)
3635 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3636
3637 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3638 LIST_REMOVE(shared_key, next);
3639 sctp_free_sharedkey(shared_key);
3640 /* sa_ignore FREED_MEMORY */
3641 }
3642
3643 /*
3644 * if we have an address list the following will free the list of
3645 * ifaddr's that are set into this ep. Again macro limitations here,
3646 * since the LIST_FOREACH could be a bad idea.
3647 */
3648 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3649 sctp_remove_laddr(laddr);
3650 }
3651
3652 #ifdef SCTP_TRACK_FREED_ASOCS
3653 /* TEMP CODE */
3654 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3655 LIST_REMOVE(asoc, sctp_tcblist);
3656 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3657 SCTP_DECR_ASOC_COUNT();
3658 }
3659 /* *** END TEMP CODE *** */
3660 #endif
3661 /* Now lets see about freeing the EP hash table. */
3662 if (inp->sctp_tcbhash != NULL) {
3663 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3664 inp->sctp_tcbhash = NULL;
3665 }
3666 /* Now we must put the ep memory back into the zone pool */
3667 crfree(inp->ip_inp.inp.inp_cred);
3668 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3669 SCTP_INP_LOCK_DESTROY(inp);
3670 SCTP_INP_READ_DESTROY(inp);
3671 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3672 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3673 SCTP_DECR_EP_COUNT();
3674 }
3675
3676 struct sctp_nets *
sctp_findnet(struct sctp_tcb * stcb,struct sockaddr * addr)3677 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3678 {
3679 struct sctp_nets *net;
3680
3681 /* locate the address */
3682 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3683 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3684 return (net);
3685 }
3686 return (NULL);
3687 }
3688
3689 int
sctp_is_address_on_local_host(struct sockaddr * addr,uint32_t vrf_id)3690 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3691 {
3692 struct sctp_ifa *sctp_ifa;
3693
3694 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3695 if (sctp_ifa) {
3696 return (1);
3697 } else {
3698 return (0);
3699 }
3700 }
3701
3702 /*
3703 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3704 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3705 * stats of stuff.
3706 */
3707 int
sctp_add_remote_addr(struct sctp_tcb * stcb,struct sockaddr * newaddr,struct sctp_nets ** netp,uint16_t port,int set_scope,int from)3708 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3709 struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3710 {
3711 /*
3712 * The following is redundant to the same lines in the
3713 * sctp_aloc_assoc() but is needed since others call the add address
3714 * function
3715 */
3716 struct sctp_nets *net, *netfirst;
3717 int addr_inscope;
3718
3719 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3720 from);
3721 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3722
3723 netfirst = sctp_findnet(stcb, newaddr);
3724 if (netfirst) {
3725 /*
3726 * Lie and return ok, we don't want to make the association
3727 * go away for this behavior. It will happen in the TCP
3728 * model in a connected socket. It does not reach the hash
3729 * table until after the association is built so it can't be
3730 * found. Mark as reachable, since the initial creation will
3731 * have been cleared and the NOT_IN_ASSOC flag will have
3732 * been added... and we don't want to end up removing it
3733 * back out.
3734 */
3735 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3736 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3737 SCTP_ADDR_UNCONFIRMED);
3738 } else {
3739 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3740 }
3741
3742 return (0);
3743 }
3744 addr_inscope = 1;
3745 switch (newaddr->sa_family) {
3746 #ifdef INET
3747 case AF_INET:
3748 {
3749 struct sockaddr_in *sin;
3750
3751 sin = (struct sockaddr_in *)newaddr;
3752 if (sin->sin_addr.s_addr == 0) {
3753 /* Invalid address */
3754 return (-1);
3755 }
3756 /* zero out the zero area */
3757 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3758
3759 /* assure len is set */
3760 sin->sin_len = sizeof(struct sockaddr_in);
3761 if (set_scope) {
3762 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3763 stcb->asoc.scope.ipv4_local_scope = 1;
3764 }
3765 } else {
3766 /* Validate the address is in scope */
3767 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3768 (stcb->asoc.scope.ipv4_local_scope == 0)) {
3769 addr_inscope = 0;
3770 }
3771 }
3772 break;
3773 }
3774 #endif
3775 #ifdef INET6
3776 case AF_INET6:
3777 {
3778 struct sockaddr_in6 *sin6;
3779
3780 sin6 = (struct sockaddr_in6 *)newaddr;
3781 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3782 /* Invalid address */
3783 return (-1);
3784 }
3785 /* assure len is set */
3786 sin6->sin6_len = sizeof(struct sockaddr_in6);
3787 if (set_scope) {
3788 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3789 stcb->asoc.scope.loopback_scope = 1;
3790 stcb->asoc.scope.local_scope = 0;
3791 stcb->asoc.scope.ipv4_local_scope = 1;
3792 stcb->asoc.scope.site_scope = 1;
3793 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3794 /*
3795 * If the new destination is a
3796 * LINK_LOCAL we must have common
3797 * site scope. Don't set the local
3798 * scope since we may not share all
3799 * links, only loopback can do this.
3800 * Links on the local network would
3801 * also be on our private network
3802 * for v4 too.
3803 */
3804 stcb->asoc.scope.ipv4_local_scope = 1;
3805 stcb->asoc.scope.site_scope = 1;
3806 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3807 /*
3808 * If the new destination is
3809 * SITE_LOCAL then we must have site
3810 * scope in common.
3811 */
3812 stcb->asoc.scope.site_scope = 1;
3813 }
3814 } else {
3815 /* Validate the address is in scope */
3816 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3817 (stcb->asoc.scope.loopback_scope == 0)) {
3818 addr_inscope = 0;
3819 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3820 (stcb->asoc.scope.local_scope == 0)) {
3821 addr_inscope = 0;
3822 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3823 (stcb->asoc.scope.site_scope == 0)) {
3824 addr_inscope = 0;
3825 }
3826 }
3827 break;
3828 }
3829 #endif
3830 default:
3831 /* not supported family type */
3832 return (-1);
3833 }
3834 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3835 if (net == NULL) {
3836 return (-1);
3837 }
3838 SCTP_INCR_RADDR_COUNT();
3839 memset(net, 0, sizeof(struct sctp_nets));
3840 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3841 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3842 switch (newaddr->sa_family) {
3843 #ifdef INET
3844 case AF_INET:
3845 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3846 break;
3847 #endif
3848 #ifdef INET6
3849 case AF_INET6:
3850 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3851 break;
3852 #endif
3853 default:
3854 break;
3855 }
3856 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3857 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3858 stcb->asoc.scope.loopback_scope = 1;
3859 stcb->asoc.scope.ipv4_local_scope = 1;
3860 stcb->asoc.scope.local_scope = 0;
3861 stcb->asoc.scope.site_scope = 1;
3862 addr_inscope = 1;
3863 }
3864 net->failure_threshold = stcb->asoc.def_net_failure;
3865 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3866 if (addr_inscope == 0) {
3867 net->dest_state = (SCTP_ADDR_REACHABLE |
3868 SCTP_ADDR_OUT_OF_SCOPE);
3869 } else {
3870 if (from == SCTP_ADDR_IS_CONFIRMED)
3871 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3872 net->dest_state = SCTP_ADDR_REACHABLE;
3873 else
3874 net->dest_state = SCTP_ADDR_REACHABLE |
3875 SCTP_ADDR_UNCONFIRMED;
3876 }
3877 /*
3878 * We set this to 0, the timer code knows that this means its an
3879 * initial value
3880 */
3881 net->rto_needed = 1;
3882 net->RTO = 0;
3883 net->RTO_measured = 0;
3884 stcb->asoc.numnets++;
3885 net->ref_count = 1;
3886 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3887 net->port = port;
3888 net->dscp = stcb->asoc.default_dscp;
3889 #ifdef INET6
3890 net->flowlabel = stcb->asoc.default_flowlabel;
3891 #endif
3892 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3893 net->dest_state |= SCTP_ADDR_NOHB;
3894 } else {
3895 net->dest_state &= ~SCTP_ADDR_NOHB;
3896 }
3897 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3898 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3899 } else {
3900 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3901 }
3902 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3903 /* Init the timer structure */
3904 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3905 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3906 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3907
3908 /* Now generate a route for this guy */
3909 #ifdef INET6
3910 /* KAME hack: embed scopeid */
3911 if (newaddr->sa_family == AF_INET6) {
3912 struct sockaddr_in6 *sin6;
3913
3914 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3915 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3916 sin6->sin6_scope_id = 0;
3917 }
3918 #endif
3919 SCTP_RTALLOC((sctp_route_t *)&net->ro,
3920 stcb->asoc.vrf_id,
3921 stcb->sctp_ep->fibnum);
3922
3923 net->src_addr_selected = 0;
3924 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3925 /* Get source address */
3926 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3927 stcb,
3928 (sctp_route_t *)&net->ro,
3929 net,
3930 0,
3931 stcb->asoc.vrf_id);
3932 if (stcb->asoc.default_mtu > 0) {
3933 net->mtu = stcb->asoc.default_mtu;
3934 switch (net->ro._l_addr.sa.sa_family) {
3935 #ifdef INET
3936 case AF_INET:
3937 net->mtu += SCTP_MIN_V4_OVERHEAD;
3938 break;
3939 #endif
3940 #ifdef INET6
3941 case AF_INET6:
3942 net->mtu += SCTP_MIN_OVERHEAD;
3943 break;
3944 #endif
3945 default:
3946 break;
3947 }
3948 #if defined(INET) || defined(INET6)
3949 if (net->port) {
3950 net->mtu += (uint32_t)sizeof(struct udphdr);
3951 }
3952 #endif
3953 } else if (net->ro._s_addr != NULL) {
3954 uint32_t imtu, rmtu, hcmtu;
3955
3956 net->src_addr_selected = 1;
3957 /* Now get the interface MTU */
3958 if (net->ro._s_addr->ifn_p != NULL) {
3959 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3960 } else {
3961 imtu = 0;
3962 }
3963 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3964 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3965 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3966 }
3967 }
3968 if (net->mtu == 0) {
3969 if (stcb->asoc.default_mtu > 0) {
3970 net->mtu = stcb->asoc.default_mtu;
3971 switch (net->ro._l_addr.sa.sa_family) {
3972 #ifdef INET
3973 case AF_INET:
3974 net->mtu += SCTP_MIN_V4_OVERHEAD;
3975 break;
3976 #endif
3977 #ifdef INET6
3978 case AF_INET6:
3979 net->mtu += SCTP_MIN_OVERHEAD;
3980 break;
3981 #endif
3982 default:
3983 break;
3984 }
3985 #if defined(INET) || defined(INET6)
3986 if (net->port) {
3987 net->mtu += (uint32_t)sizeof(struct udphdr);
3988 }
3989 #endif
3990 } else {
3991 switch (newaddr->sa_family) {
3992 #ifdef INET
3993 case AF_INET:
3994 net->mtu = SCTP_DEFAULT_MTU;
3995 break;
3996 #endif
3997 #ifdef INET6
3998 case AF_INET6:
3999 net->mtu = 1280;
4000 break;
4001 #endif
4002 default:
4003 break;
4004 }
4005 }
4006 }
4007 #if defined(INET) || defined(INET6)
4008 if (net->port) {
4009 net->mtu -= (uint32_t)sizeof(struct udphdr);
4010 }
4011 #endif
4012 if (from == SCTP_ALLOC_ASOC) {
4013 stcb->asoc.smallest_mtu = net->mtu;
4014 }
4015 if (stcb->asoc.smallest_mtu > net->mtu) {
4016 sctp_pathmtu_adjustment(stcb, net->mtu);
4017 }
4018 #ifdef INET6
4019 if (newaddr->sa_family == AF_INET6) {
4020 struct sockaddr_in6 *sin6;
4021
4022 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4023 (void)sa6_recoverscope(sin6);
4024 }
4025 #endif
4026
4027 /* JRS - Use the congestion control given in the CC module */
4028 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4029 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4030
4031 /*
4032 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4033 * of assoc (2005/06/27, [email protected])
4034 */
4035 net->find_pseudo_cumack = 1;
4036 net->find_rtx_pseudo_cumack = 1;
4037 /* Choose an initial flowid. */
4038 net->flowid = stcb->asoc.my_vtag ^
4039 ntohs(stcb->rport) ^
4040 ntohs(stcb->sctp_ep->sctp_lport);
4041 net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4042 if (netp) {
4043 *netp = net;
4044 }
4045 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4046 if (net->ro.ro_nh == NULL) {
4047 /* Since we have no route put it at the back */
4048 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4049 } else if (netfirst == NULL) {
4050 /* We are the first one in the pool. */
4051 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4052 } else if (netfirst->ro.ro_nh == NULL) {
4053 /*
4054 * First one has NO route. Place this one ahead of the first
4055 * one.
4056 */
4057 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4058 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4059 /*
4060 * This one has a different interface than the one at the
4061 * top of the list. Place it ahead.
4062 */
4063 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4064 } else {
4065 /*
4066 * Ok we have the same interface as the first one. Move
4067 * forward until we find either a) one with a NULL route...
4068 * insert ahead of that b) one with a different ifp.. insert
4069 * after that. c) end of the list.. insert at the tail.
4070 */
4071 struct sctp_nets *netlook;
4072
4073 do {
4074 netlook = TAILQ_NEXT(netfirst, sctp_next);
4075 if (netlook == NULL) {
4076 /* End of the list */
4077 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4078 break;
4079 } else if (netlook->ro.ro_nh == NULL) {
4080 /* next one has NO route */
4081 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4082 break;
4083 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4084 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4085 net, sctp_next);
4086 break;
4087 }
4088 /* Shift forward */
4089 netfirst = netlook;
4090 } while (netlook != NULL);
4091 }
4092
4093 /* got to have a primary set */
4094 if (stcb->asoc.primary_destination == 0) {
4095 stcb->asoc.primary_destination = net;
4096 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4097 (net->ro.ro_nh) &&
4098 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4099 /* No route to current primary adopt new primary */
4100 stcb->asoc.primary_destination = net;
4101 }
4102 /* Validate primary is first */
4103 net = TAILQ_FIRST(&stcb->asoc.nets);
4104 if ((net != stcb->asoc.primary_destination) &&
4105 (stcb->asoc.primary_destination)) {
4106 /*
4107 * first one on the list is NOT the primary sctp_cmpaddr()
4108 * is much more efficient if the primary is the first on the
4109 * list, make it so.
4110 */
4111 TAILQ_REMOVE(&stcb->asoc.nets,
4112 stcb->asoc.primary_destination, sctp_next);
4113 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4114 stcb->asoc.primary_destination, sctp_next);
4115 }
4116 return (0);
4117 }
4118
4119 static uint32_t
sctp_aloc_a_assoc_id(struct sctp_inpcb * inp,struct sctp_tcb * stcb)4120 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4121 {
4122 uint32_t id;
4123 struct sctpasochead *head;
4124 struct sctp_tcb *lstcb;
4125
4126 try_again:
4127 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4128 /* TSNH */
4129 return (0);
4130 }
4131 /*
4132 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4133 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4134 */
4135 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4136 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4137 }
4138 id = inp->sctp_associd_counter;
4139 inp->sctp_associd_counter++;
4140 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4141 if (lstcb) {
4142 goto try_again;
4143 }
4144 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4145 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4146 stcb->asoc.in_asocid_hash = 1;
4147 return (id);
4148 }
4149
4150 /*
4151 * allocate an association and add it to the endpoint. The caller must be
4152 * careful to add all additional addresses once they are know right away or
4153 * else the assoc will be may experience a blackout scenario.
4154 */
4155 struct sctp_tcb *
sctp_aloc_assoc(struct sctp_inpcb * inp,struct sockaddr * firstaddr,int * error,uint32_t override_tag,uint32_t vrf_id,uint16_t o_streams,uint16_t port,struct thread * p,int initialize_auth_params)4156 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4157 int *error, uint32_t override_tag, uint32_t vrf_id,
4158 uint16_t o_streams, uint16_t port,
4159 struct thread *p,
4160 int initialize_auth_params)
4161 {
4162 /* note the p argument is only valid in unbound sockets */
4163
4164 struct sctp_tcb *stcb;
4165 struct sctp_association *asoc;
4166 struct sctpasochead *head;
4167 uint16_t rport;
4168 int err;
4169
4170 /*
4171 * Assumption made here: Caller has done a
4172 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4173 * address does not exist already.
4174 */
4175 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4176 /* Hit max assoc, sorry no more */
4177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4178 *error = ENOBUFS;
4179 return (NULL);
4180 }
4181 if (firstaddr == NULL) {
4182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4183 *error = EINVAL;
4184 return (NULL);
4185 }
4186 SCTP_INP_RLOCK(inp);
4187 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4188 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4189 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4190 /*
4191 * If its in the TCP pool, its NOT allowed to create an
4192 * association. The parent listener needs to call
4193 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4194 * off, or connected one does this.. its an error.
4195 */
4196 SCTP_INP_RUNLOCK(inp);
4197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4198 *error = EINVAL;
4199 return (NULL);
4200 }
4201 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4202 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4203 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4204 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4205 SCTP_INP_RUNLOCK(inp);
4206 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4207 *error = EINVAL;
4208 return (NULL);
4209 }
4210 }
4211 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4212 #ifdef SCTP_DEBUG
4213 if (firstaddr) {
4214 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4215 switch (firstaddr->sa_family) {
4216 #ifdef INET
4217 case AF_INET:
4218 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4219 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4220 break;
4221 #endif
4222 #ifdef INET6
4223 case AF_INET6:
4224 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4225 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4226 break;
4227 #endif
4228 default:
4229 break;
4230 }
4231 } else {
4232 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4233 }
4234 #endif /* SCTP_DEBUG */
4235 switch (firstaddr->sa_family) {
4236 #ifdef INET
4237 case AF_INET:
4238 {
4239 struct sockaddr_in *sin;
4240
4241 sin = (struct sockaddr_in *)firstaddr;
4242 if ((ntohs(sin->sin_port) == 0) ||
4243 (sin->sin_addr.s_addr == INADDR_ANY) ||
4244 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4245 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4246 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) &&
4247 (SCTP_IPV6_V6ONLY(inp) != 0))) {
4248 /* Invalid address */
4249 SCTP_INP_RUNLOCK(inp);
4250 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4251 *error = EINVAL;
4252 return (NULL);
4253 }
4254 rport = sin->sin_port;
4255 break;
4256 }
4257 #endif
4258 #ifdef INET6
4259 case AF_INET6:
4260 {
4261 struct sockaddr_in6 *sin6;
4262
4263 sin6 = (struct sockaddr_in6 *)firstaddr;
4264 if ((ntohs(sin6->sin6_port) == 0) ||
4265 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4266 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4267 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4268 /* Invalid address */
4269 SCTP_INP_RUNLOCK(inp);
4270 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4271 *error = EINVAL;
4272 return (NULL);
4273 }
4274 rport = sin6->sin6_port;
4275 break;
4276 }
4277 #endif
4278 default:
4279 /* not supported family type */
4280 SCTP_INP_RUNLOCK(inp);
4281 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4282 *error = EINVAL;
4283 return (NULL);
4284 }
4285 SCTP_INP_RUNLOCK(inp);
4286 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4287 /*
4288 * If you have not performed a bind, then we need to do the
4289 * ephemeral bind for you.
4290 */
4291 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4292 /* bind error, probably perm */
4293 *error = err;
4294 return (NULL);
4295 }
4296 }
4297 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4298 if (stcb == NULL) {
4299 /* out of memory? */
4300 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4301 *error = ENOMEM;
4302 return (NULL);
4303 }
4304 SCTP_INCR_ASOC_COUNT();
4305
4306 memset(stcb, 0, sizeof(*stcb));
4307 asoc = &stcb->asoc;
4308
4309 SCTP_TCB_LOCK_INIT(stcb);
4310 SCTP_TCB_SEND_LOCK_INIT(stcb);
4311 stcb->rport = rport;
4312 /* setup back pointer's */
4313 stcb->sctp_ep = inp;
4314 stcb->sctp_socket = inp->sctp_socket;
4315 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4316 /* failed */
4317 SCTP_TCB_LOCK_DESTROY(stcb);
4318 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4319 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4320 SCTP_DECR_ASOC_COUNT();
4321 *error = err;
4322 return (NULL);
4323 }
4324 /* and the port */
4325 SCTP_INP_INFO_WLOCK();
4326 SCTP_INP_WLOCK(inp);
4327 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4328 /* inpcb freed while alloc going on */
4329 SCTP_TCB_LOCK_DESTROY(stcb);
4330 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4331 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4332 SCTP_INP_WUNLOCK(inp);
4333 SCTP_INP_INFO_WUNLOCK();
4334 SCTP_DECR_ASOC_COUNT();
4335 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4336 *error = EINVAL;
4337 return (NULL);
4338 }
4339 SCTP_TCB_LOCK(stcb);
4340
4341 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4342 /* now that my_vtag is set, add it to the hash */
4343 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4344 /* put it in the bucket in the vtag hash of assoc's for the system */
4345 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4346 SCTP_INP_INFO_WUNLOCK();
4347
4348 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4349 /* failure.. memory error? */
4350 if (asoc->strmout) {
4351 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4352 asoc->strmout = NULL;
4353 }
4354 if (asoc->mapping_array) {
4355 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4356 asoc->mapping_array = NULL;
4357 }
4358 if (asoc->nr_mapping_array) {
4359 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4360 asoc->nr_mapping_array = NULL;
4361 }
4362 SCTP_DECR_ASOC_COUNT();
4363 SCTP_TCB_UNLOCK(stcb);
4364 SCTP_TCB_LOCK_DESTROY(stcb);
4365 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4366 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4367 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4368 SCTP_INP_WUNLOCK(inp);
4369 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4370 *error = ENOBUFS;
4371 return (NULL);
4372 }
4373 /* Init all the timers */
4374 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4375 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4376 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4377 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4378 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4379 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4380
4381 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4382 /* now file the port under the hash as well */
4383 if (inp->sctp_tcbhash != NULL) {
4384 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4385 inp->sctp_hashmark)];
4386 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4387 }
4388 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4389 sctp_initialize_auth_params(inp, stcb);
4390 }
4391 SCTP_INP_WUNLOCK(inp);
4392 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4393 return (stcb);
4394 }
4395
4396 void
sctp_remove_net(struct sctp_tcb * stcb,struct sctp_nets * net)4397 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4398 {
4399 struct sctp_inpcb *inp;
4400 struct sctp_association *asoc;
4401
4402 inp = stcb->sctp_ep;
4403 asoc = &stcb->asoc;
4404 asoc->numnets--;
4405 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4406 if (net == asoc->primary_destination) {
4407 /* Reset primary */
4408 struct sctp_nets *lnet;
4409
4410 lnet = TAILQ_FIRST(&asoc->nets);
4411 /*
4412 * Mobility adaptation Ideally, if deleted destination is
4413 * the primary, it becomes a fast retransmission trigger by
4414 * the subsequent SET PRIMARY. (by micchie)
4415 */
4416 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4417 SCTP_MOBILITY_BASE) ||
4418 sctp_is_mobility_feature_on(stcb->sctp_ep,
4419 SCTP_MOBILITY_FASTHANDOFF)) {
4420 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4421 if (asoc->deleted_primary != NULL) {
4422 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4423 goto out;
4424 }
4425 asoc->deleted_primary = net;
4426 atomic_add_int(&net->ref_count, 1);
4427 memset(&net->lastsa, 0, sizeof(net->lastsa));
4428 memset(&net->lastsv, 0, sizeof(net->lastsv));
4429 sctp_mobility_feature_on(stcb->sctp_ep,
4430 SCTP_MOBILITY_PRIM_DELETED);
4431 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4432 stcb->sctp_ep, stcb, NULL);
4433 }
4434 out:
4435 /* Try to find a confirmed primary */
4436 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4437 }
4438 if (net == asoc->last_data_chunk_from) {
4439 /* Reset primary */
4440 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4441 }
4442 if (net == asoc->last_control_chunk_from) {
4443 /* Clear net */
4444 asoc->last_control_chunk_from = NULL;
4445 }
4446 if (net == asoc->last_net_cmt_send_started) {
4447 /* Clear net */
4448 asoc->last_net_cmt_send_started = NULL;
4449 }
4450 if (net == stcb->asoc.alternate) {
4451 sctp_free_remote_addr(stcb->asoc.alternate);
4452 stcb->asoc.alternate = NULL;
4453 }
4454 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4455 SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4456 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4457 SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4458 net->dest_state |= SCTP_ADDR_BEING_DELETED;
4459 sctp_free_remote_addr(net);
4460 }
4461
4462 /*
4463 * remove a remote endpoint address from an association, it will fail if the
4464 * address does not exist.
4465 */
4466 int
sctp_del_remote_addr(struct sctp_tcb * stcb,struct sockaddr * remaddr)4467 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4468 {
4469 /*
4470 * Here we need to remove a remote address. This is quite simple, we
4471 * first find it in the list of address for the association
4472 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4473 * on that item. Note we do not allow it to be removed if there are
4474 * no other addresses.
4475 */
4476 struct sctp_association *asoc;
4477 struct sctp_nets *net, *nnet;
4478
4479 asoc = &stcb->asoc;
4480
4481 /* locate the address */
4482 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4483 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4484 continue;
4485 }
4486 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4487 remaddr)) {
4488 /* we found the guy */
4489 if (asoc->numnets < 2) {
4490 /* Must have at LEAST two remote addresses */
4491 return (-1);
4492 } else {
4493 sctp_remove_net(stcb, net);
4494 return (0);
4495 }
4496 }
4497 }
4498 /* not found. */
4499 return (-2);
4500 }
4501
4502 void
sctp_delete_from_timewait(uint32_t tag,uint16_t lport,uint16_t rport)4503 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4504 {
4505 struct sctpvtaghead *chain;
4506 struct sctp_tagblock *twait_block;
4507 int found = 0;
4508 int i;
4509
4510 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4511 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4512 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4513 if ((twait_block->vtag_block[i].v_tag == tag) &&
4514 (twait_block->vtag_block[i].lport == lport) &&
4515 (twait_block->vtag_block[i].rport == rport)) {
4516 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4517 twait_block->vtag_block[i].v_tag = 0;
4518 twait_block->vtag_block[i].lport = 0;
4519 twait_block->vtag_block[i].rport = 0;
4520 found = 1;
4521 break;
4522 }
4523 }
4524 if (found)
4525 break;
4526 }
4527 }
4528
4529 int
sctp_is_in_timewait(uint32_t tag,uint16_t lport,uint16_t rport)4530 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4531 {
4532 struct sctpvtaghead *chain;
4533 struct sctp_tagblock *twait_block;
4534 int found = 0;
4535 int i;
4536
4537 SCTP_INP_INFO_WLOCK();
4538 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4539 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4540 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4541 if ((twait_block->vtag_block[i].v_tag == tag) &&
4542 (twait_block->vtag_block[i].lport == lport) &&
4543 (twait_block->vtag_block[i].rport == rport)) {
4544 found = 1;
4545 break;
4546 }
4547 }
4548 if (found)
4549 break;
4550 }
4551 SCTP_INP_INFO_WUNLOCK();
4552 return (found);
4553 }
4554
4555 void
sctp_add_vtag_to_timewait(uint32_t tag,uint32_t time,uint16_t lport,uint16_t rport)4556 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4557 {
4558 struct sctpvtaghead *chain;
4559 struct sctp_tagblock *twait_block;
4560 struct timeval now;
4561 int set, i;
4562
4563 if (time == 0) {
4564 /* Its disabled */
4565 return;
4566 }
4567 (void)SCTP_GETTIME_TIMEVAL(&now);
4568 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4569 set = 0;
4570 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4571 /* Block(s) present, lets find space, and expire on the fly */
4572 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4573 if ((twait_block->vtag_block[i].v_tag == 0) &&
4574 !set) {
4575 twait_block->vtag_block[i].tv_sec_at_expire =
4576 now.tv_sec + time;
4577 twait_block->vtag_block[i].v_tag = tag;
4578 twait_block->vtag_block[i].lport = lport;
4579 twait_block->vtag_block[i].rport = rport;
4580 set = 1;
4581 } else if ((twait_block->vtag_block[i].v_tag) &&
4582 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4583 /* Audit expires this guy */
4584 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4585 twait_block->vtag_block[i].v_tag = 0;
4586 twait_block->vtag_block[i].lport = 0;
4587 twait_block->vtag_block[i].rport = 0;
4588 if (set == 0) {
4589 /* Reuse it for my new tag */
4590 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4591 twait_block->vtag_block[i].v_tag = tag;
4592 twait_block->vtag_block[i].lport = lport;
4593 twait_block->vtag_block[i].rport = rport;
4594 set = 1;
4595 }
4596 }
4597 }
4598 if (set) {
4599 /*
4600 * We only do up to the block where we can place our
4601 * tag for audits
4602 */
4603 break;
4604 }
4605 }
4606 /* Need to add a new block to chain */
4607 if (!set) {
4608 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4609 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4610 if (twait_block == NULL) {
4611 return;
4612 }
4613 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4614 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4615 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4616 twait_block->vtag_block[0].v_tag = tag;
4617 twait_block->vtag_block[0].lport = lport;
4618 twait_block->vtag_block[0].rport = rport;
4619 }
4620 }
4621
4622 void
sctp_clean_up_stream(struct sctp_tcb * stcb,struct sctp_readhead * rh)4623 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4624 {
4625 struct sctp_tmit_chunk *chk, *nchk;
4626 struct sctp_queued_to_read *control, *ncontrol;
4627
4628 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4629 TAILQ_REMOVE(rh, control, next_instrm);
4630 control->on_strm_q = 0;
4631 if (control->on_read_q == 0) {
4632 sctp_free_remote_addr(control->whoFrom);
4633 if (control->data) {
4634 sctp_m_freem(control->data);
4635 control->data = NULL;
4636 }
4637 }
4638 /* Reassembly free? */
4639 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4640 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4641 if (chk->data) {
4642 sctp_m_freem(chk->data);
4643 chk->data = NULL;
4644 }
4645 if (chk->holds_key_ref)
4646 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4647 sctp_free_remote_addr(chk->whoTo);
4648 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4649 SCTP_DECR_CHK_COUNT();
4650 /* sa_ignore FREED_MEMORY */
4651 }
4652 /*
4653 * We don't free the address here since all the net's were
4654 * freed above.
4655 */
4656 if (control->on_read_q == 0) {
4657 sctp_free_a_readq(stcb, control);
4658 }
4659 }
4660 }
4661
4662 /*-
4663 * Free the association after un-hashing the remote port. This
4664 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4665 * expect that the input to this function IS a locked TCB.
4666 * It will return 0, if it did NOT destroy the association (instead
4667 * it unlocks it. It will return NON-zero if it either destroyed the
4668 * association OR the association is already destroyed.
4669 */
4670 int
sctp_free_assoc(struct sctp_inpcb * inp,struct sctp_tcb * stcb,int from_inpcbfree,int from_location)4671 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4672 {
4673 int i;
4674 struct sctp_association *asoc;
4675 struct sctp_nets *net, *nnet;
4676 struct sctp_laddr *laddr, *naddr;
4677 struct sctp_tmit_chunk *chk, *nchk;
4678 struct sctp_asconf_addr *aparam, *naparam;
4679 struct sctp_asconf_ack *aack, *naack;
4680 struct sctp_stream_reset_list *strrst, *nstrrst;
4681 struct sctp_queued_to_read *sq, *nsq;
4682 struct sctp_stream_queue_pending *sp, *nsp;
4683 sctp_sharedkey_t *shared_key, *nshared_key;
4684 struct socket *so;
4685
4686 /* first, lets purge the entry from the hash table. */
4687
4688 #ifdef SCTP_LOG_CLOSING
4689 sctp_log_closing(inp, stcb, 6);
4690 #endif
4691 if (stcb->asoc.state == 0) {
4692 #ifdef SCTP_LOG_CLOSING
4693 sctp_log_closing(inp, NULL, 7);
4694 #endif
4695 /* there is no asoc, really TSNH :-0 */
4696 return (1);
4697 }
4698 SCTP_TCB_SEND_LOCK(stcb);
4699 if (stcb->asoc.alternate) {
4700 sctp_free_remote_addr(stcb->asoc.alternate);
4701 stcb->asoc.alternate = NULL;
4702 }
4703 /* TEMP CODE */
4704 if (stcb->freed_from_where == 0) {
4705 /* Only record the first place free happened from */
4706 stcb->freed_from_where = from_location;
4707 }
4708 /* TEMP CODE */
4709
4710 asoc = &stcb->asoc;
4711 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4712 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4713 /* nothing around */
4714 so = NULL;
4715 else
4716 so = inp->sctp_socket;
4717
4718 /*
4719 * We used timer based freeing if a reader or writer is in the way.
4720 * So we first check if we are actually being called from a timer,
4721 * if so we abort early if a reader or writer is still in the way.
4722 */
4723 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4724 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4725 /*
4726 * is it the timer driving us? if so are the reader/writers
4727 * gone?
4728 */
4729 if (stcb->asoc.refcnt) {
4730 /* nope, reader or writer in the way */
4731 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4732 /* no asoc destroyed */
4733 SCTP_TCB_SEND_UNLOCK(stcb);
4734 SCTP_TCB_UNLOCK(stcb);
4735 #ifdef SCTP_LOG_CLOSING
4736 sctp_log_closing(inp, stcb, 8);
4737 #endif
4738 return (0);
4739 }
4740 }
4741 /* Now clean up any other timers */
4742 sctp_stop_association_timers(stcb, false);
4743 /* Now the read queue needs to be cleaned up (only once) */
4744 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4745 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4746 SCTP_INP_READ_LOCK(inp);
4747 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4748 if (sq->stcb == stcb) {
4749 sq->do_not_ref_stcb = 1;
4750 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4751 /*
4752 * If there is no end, there never will be
4753 * now.
4754 */
4755 if (sq->end_added == 0) {
4756 /* Held for PD-API clear that. */
4757 sq->pdapi_aborted = 1;
4758 sq->held_length = 0;
4759 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4760 /*
4761 * Need to add a PD-API
4762 * aborted indication.
4763 * Setting the control_pdapi
4764 * assures that it will be
4765 * added right after this
4766 * msg.
4767 */
4768 uint32_t strseq;
4769
4770 stcb->asoc.control_pdapi = sq;
4771 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4772 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4773 stcb,
4774 SCTP_PARTIAL_DELIVERY_ABORTED,
4775 (void *)&strseq,
4776 SCTP_SO_LOCKED);
4777 stcb->asoc.control_pdapi = NULL;
4778 }
4779 }
4780 /* Add an end to wake them */
4781 sq->end_added = 1;
4782 }
4783 }
4784 SCTP_INP_READ_UNLOCK(inp);
4785 if (stcb->block_entry) {
4786 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4787 stcb->block_entry->error = ECONNRESET;
4788 stcb->block_entry = NULL;
4789 }
4790 }
4791 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4792 /*
4793 * Someone holds a reference OR the socket is unaccepted
4794 * yet.
4795 */
4796 if ((stcb->asoc.refcnt) ||
4797 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4798 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4799 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4800 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4801 }
4802 SCTP_TCB_SEND_UNLOCK(stcb);
4803 SCTP_TCB_UNLOCK(stcb);
4804 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4805 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4806 /* nothing around */
4807 so = NULL;
4808 if (so) {
4809 /* Wake any reader/writers */
4810 sctp_sorwakeup(inp, so);
4811 sctp_sowwakeup(inp, so);
4812 }
4813
4814 #ifdef SCTP_LOG_CLOSING
4815 sctp_log_closing(inp, stcb, 9);
4816 #endif
4817 /* no asoc destroyed */
4818 return (0);
4819 }
4820 #ifdef SCTP_LOG_CLOSING
4821 sctp_log_closing(inp, stcb, 10);
4822 #endif
4823 /*
4824 * When I reach here, no others want to kill the assoc yet.. and I
4825 * own the lock. Now its possible an abort comes in when I do the
4826 * lock exchange below to grab all the locks to do the final take
4827 * out. to prevent this we increment the count, which will start a
4828 * timer and blow out above thus assuring us that we hold exclusive
4829 * killing of the asoc. Note that after getting back the TCB lock we
4830 * will go ahead and increment the counter back up and stop any
4831 * timer a passing stranger may have started :-S
4832 */
4833 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4834 atomic_add_int(&stcb->asoc.refcnt, 1);
4835
4836 SCTP_TCB_SEND_UNLOCK(stcb);
4837 SCTP_TCB_UNLOCK(stcb);
4838 SCTP_INP_INFO_WLOCK();
4839 SCTP_INP_WLOCK(inp);
4840 SCTP_TCB_LOCK(stcb);
4841 SCTP_TCB_SEND_LOCK(stcb);
4842 }
4843 /* Double check the GONE flag */
4844 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4845 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4846 /* nothing around */
4847 so = NULL;
4848
4849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4850 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4851 /*
4852 * For TCP type we need special handling when we are
4853 * connected. We also include the peel'ed off ones to.
4854 */
4855 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4856 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4857 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4858 if (so) {
4859 SOCKBUF_LOCK(&so->so_rcv);
4860 so->so_state &= ~(SS_ISCONNECTING |
4861 SS_ISDISCONNECTING |
4862 SS_ISCONFIRMING |
4863 SS_ISCONNECTED);
4864 so->so_state |= SS_ISDISCONNECTED;
4865 socantrcvmore_locked(so);
4866 socantsendmore(so);
4867 sctp_sowwakeup(inp, so);
4868 sctp_sorwakeup(inp, so);
4869 SCTP_SOWAKEUP(so);
4870 }
4871 }
4872 }
4873
4874 /*
4875 * Make it invalid too, that way if its about to run it will abort
4876 * and return.
4877 */
4878 /* re-increment the lock */
4879 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4880 atomic_add_int(&stcb->asoc.refcnt, -1);
4881 }
4882 if (stcb->asoc.refcnt) {
4883 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4884 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4885 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4886 SCTP_INP_INFO_WUNLOCK();
4887 SCTP_INP_WUNLOCK(inp);
4888 }
4889 SCTP_TCB_SEND_UNLOCK(stcb);
4890 SCTP_TCB_UNLOCK(stcb);
4891 return (0);
4892 }
4893 asoc->state = 0;
4894 if (inp->sctp_tcbhash) {
4895 LIST_REMOVE(stcb, sctp_tcbhash);
4896 }
4897 if (stcb->asoc.in_asocid_hash) {
4898 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4899 }
4900 /* Now lets remove it from the list of ALL associations in the EP */
4901 LIST_REMOVE(stcb, sctp_tcblist);
4902 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4903 SCTP_INP_INCR_REF(inp);
4904 SCTP_INP_WUNLOCK(inp);
4905 }
4906 /* pull from vtag hash */
4907 LIST_REMOVE(stcb, sctp_asocs);
4908 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4909 inp->sctp_lport, stcb->rport);
4910
4911 /*
4912 * Now restop the timers to be sure this is paranoia at is finest!
4913 */
4914 sctp_stop_association_timers(stcb, true);
4915
4916 /*
4917 * The chunk lists and such SHOULD be empty but we check them just
4918 * in case.
4919 */
4920 /* anything on the wheel needs to be removed */
4921 for (i = 0; i < asoc->streamoutcnt; i++) {
4922 struct sctp_stream_out *outs;
4923
4924 outs = &asoc->strmout[i];
4925 /* now clean up any chunks here */
4926 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4927 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4928 TAILQ_REMOVE(&outs->outqueue, sp, next);
4929 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4930 sctp_free_spbufspace(stcb, asoc, sp);
4931 if (sp->data) {
4932 if (so) {
4933 /* Still an open socket - report */
4934 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4935 0, (void *)sp, SCTP_SO_LOCKED);
4936 }
4937 if (sp->data) {
4938 sctp_m_freem(sp->data);
4939 sp->data = NULL;
4940 sp->tail_mbuf = NULL;
4941 sp->length = 0;
4942 }
4943 }
4944 if (sp->net) {
4945 sctp_free_remote_addr(sp->net);
4946 sp->net = NULL;
4947 }
4948 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4949 }
4950 }
4951 /* sa_ignore FREED_MEMORY */
4952 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4953 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4954 SCTP_FREE(strrst, SCTP_M_STRESET);
4955 }
4956 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4957 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4958 if (sq->data) {
4959 sctp_m_freem(sq->data);
4960 sq->data = NULL;
4961 }
4962 sctp_free_remote_addr(sq->whoFrom);
4963 sq->whoFrom = NULL;
4964 sq->stcb = NULL;
4965 /* Free the ctl entry */
4966 sctp_free_a_readq(stcb, sq);
4967 /* sa_ignore FREED_MEMORY */
4968 }
4969 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4970 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4971 if (chk->data) {
4972 sctp_m_freem(chk->data);
4973 chk->data = NULL;
4974 }
4975 if (chk->holds_key_ref)
4976 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4977 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4978 SCTP_DECR_CHK_COUNT();
4979 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4980 asoc->free_chunk_cnt--;
4981 /* sa_ignore FREED_MEMORY */
4982 }
4983 /* pending send queue SHOULD be empty */
4984 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4985 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4986 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4987 #ifdef INVARIANTS
4988 } else {
4989 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
4990 #endif
4991 }
4992 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4993 if (chk->data) {
4994 if (so) {
4995 /* Still a socket? */
4996 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4997 0, chk, SCTP_SO_LOCKED);
4998 }
4999 if (chk->data) {
5000 sctp_m_freem(chk->data);
5001 chk->data = NULL;
5002 }
5003 }
5004 if (chk->holds_key_ref)
5005 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5006 if (chk->whoTo) {
5007 sctp_free_remote_addr(chk->whoTo);
5008 chk->whoTo = NULL;
5009 }
5010 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5011 SCTP_DECR_CHK_COUNT();
5012 /* sa_ignore FREED_MEMORY */
5013 }
5014 /* sent queue SHOULD be empty */
5015 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5016 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5017 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5018 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5019 #ifdef INVARIANTS
5020 } else {
5021 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5022 #endif
5023 }
5024 }
5025 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5026 if (chk->data) {
5027 if (so) {
5028 /* Still a socket? */
5029 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5030 0, chk, SCTP_SO_LOCKED);
5031 }
5032 if (chk->data) {
5033 sctp_m_freem(chk->data);
5034 chk->data = NULL;
5035 }
5036 }
5037 if (chk->holds_key_ref)
5038 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5039 sctp_free_remote_addr(chk->whoTo);
5040 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5041 SCTP_DECR_CHK_COUNT();
5042 /* sa_ignore FREED_MEMORY */
5043 }
5044 #ifdef INVARIANTS
5045 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5046 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5047 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5048 }
5049 }
5050 #endif
5051 /* control queue MAY not be empty */
5052 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5053 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5054 if (chk->data) {
5055 sctp_m_freem(chk->data);
5056 chk->data = NULL;
5057 }
5058 if (chk->holds_key_ref)
5059 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5060 sctp_free_remote_addr(chk->whoTo);
5061 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5062 SCTP_DECR_CHK_COUNT();
5063 /* sa_ignore FREED_MEMORY */
5064 }
5065 /* ASCONF queue MAY not be empty */
5066 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5067 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5068 if (chk->data) {
5069 sctp_m_freem(chk->data);
5070 chk->data = NULL;
5071 }
5072 if (chk->holds_key_ref)
5073 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5074 sctp_free_remote_addr(chk->whoTo);
5075 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5076 SCTP_DECR_CHK_COUNT();
5077 /* sa_ignore FREED_MEMORY */
5078 }
5079 if (asoc->mapping_array) {
5080 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5081 asoc->mapping_array = NULL;
5082 }
5083 if (asoc->nr_mapping_array) {
5084 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5085 asoc->nr_mapping_array = NULL;
5086 }
5087 /* the stream outs */
5088 if (asoc->strmout) {
5089 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5090 asoc->strmout = NULL;
5091 }
5092 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5093 if (asoc->strmin) {
5094 for (i = 0; i < asoc->streamincnt; i++) {
5095 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5096 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5097 }
5098 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5099 asoc->strmin = NULL;
5100 }
5101 asoc->streamincnt = 0;
5102 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5103 #ifdef INVARIANTS
5104 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5105 panic("no net's left alloc'ed, or list points to itself");
5106 }
5107 #endif
5108 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5109 sctp_free_remote_addr(net);
5110 }
5111 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5112 /* sa_ignore FREED_MEMORY */
5113 sctp_remove_laddr(laddr);
5114 }
5115
5116 /* pending asconf (address) parameters */
5117 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5118 /* sa_ignore FREED_MEMORY */
5119 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5120 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5121 }
5122 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5123 /* sa_ignore FREED_MEMORY */
5124 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5125 if (aack->data != NULL) {
5126 sctp_m_freem(aack->data);
5127 }
5128 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5129 }
5130 /* clean up auth stuff */
5131 if (asoc->local_hmacs)
5132 sctp_free_hmaclist(asoc->local_hmacs);
5133 if (asoc->peer_hmacs)
5134 sctp_free_hmaclist(asoc->peer_hmacs);
5135
5136 if (asoc->local_auth_chunks)
5137 sctp_free_chunklist(asoc->local_auth_chunks);
5138 if (asoc->peer_auth_chunks)
5139 sctp_free_chunklist(asoc->peer_auth_chunks);
5140
5141 sctp_free_authinfo(&asoc->authinfo);
5142
5143 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5144 LIST_REMOVE(shared_key, next);
5145 sctp_free_sharedkey(shared_key);
5146 /* sa_ignore FREED_MEMORY */
5147 }
5148
5149 /* Insert new items here :> */
5150
5151 /* Get rid of LOCK */
5152 SCTP_TCB_SEND_UNLOCK(stcb);
5153 SCTP_TCB_UNLOCK(stcb);
5154 SCTP_TCB_LOCK_DESTROY(stcb);
5155 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5156 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5157 SCTP_INP_INFO_WUNLOCK();
5158 SCTP_INP_RLOCK(inp);
5159 }
5160 #ifdef SCTP_TRACK_FREED_ASOCS
5161 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5162 /* now clean up the tasoc itself */
5163 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5164 SCTP_DECR_ASOC_COUNT();
5165 } else {
5166 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5167 }
5168 #else
5169 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5170 SCTP_DECR_ASOC_COUNT();
5171 #endif
5172 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5173 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5174 /*
5175 * If its NOT the inp_free calling us AND sctp_close
5176 * as been called, we call back...
5177 */
5178 SCTP_INP_RUNLOCK(inp);
5179 /*
5180 * This will start the kill timer (if we are the
5181 * last one) since we hold an increment yet. But
5182 * this is the only safe way to do this since
5183 * otherwise if the socket closes at the same time
5184 * we are here we might collide in the cleanup.
5185 */
5186 sctp_inpcb_free(inp,
5187 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5188 SCTP_CALLED_DIRECTLY_NOCMPSET);
5189 SCTP_INP_DECR_REF(inp);
5190 } else {
5191 /* The socket is still open. */
5192 SCTP_INP_DECR_REF(inp);
5193 SCTP_INP_RUNLOCK(inp);
5194 }
5195 }
5196 /* destroyed the asoc */
5197 #ifdef SCTP_LOG_CLOSING
5198 sctp_log_closing(inp, NULL, 11);
5199 #endif
5200 return (1);
5201 }
5202
5203 /*
5204 * determine if a destination is "reachable" based upon the addresses bound
5205 * to the current endpoint (e.g. only v4 or v6 currently bound)
5206 */
5207 /*
5208 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5209 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5210 * types bound as its endpoint
5211 */
5212 int
sctp_destination_is_reachable(struct sctp_tcb * stcb,struct sockaddr * destaddr)5213 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5214 {
5215 struct sctp_inpcb *inp;
5216 int answer;
5217
5218 /*
5219 * No locks here, the TCB, in all cases is already locked and an
5220 * assoc is up. There is either a INP lock by the caller applied (in
5221 * asconf case when deleting an address) or NOT in the HB case,
5222 * however if HB then the INP increment is up and the INP will not
5223 * be removed (on top of the fact that we have a TCB lock). So we
5224 * only want to read the sctp_flags, which is either bound-all or
5225 * not.. no protection needed since once an assoc is up you can't be
5226 * changing your binding.
5227 */
5228 inp = stcb->sctp_ep;
5229 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5230 /* if bound all, destination is not restricted */
5231 /*
5232 * RRS: Question during lock work: Is this correct? If you
5233 * are bound-all you still might need to obey the V4--V6
5234 * flags??? IMO this bound-all stuff needs to be removed!
5235 */
5236 return (1);
5237 }
5238 /* NOTE: all "scope" checks are done when local addresses are added */
5239 switch (destaddr->sa_family) {
5240 #ifdef INET6
5241 case AF_INET6:
5242 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5243 break;
5244 #endif
5245 #ifdef INET
5246 case AF_INET:
5247 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5248 break;
5249 #endif
5250 default:
5251 /* invalid family, so it's unreachable */
5252 answer = 0;
5253 break;
5254 }
5255 return (answer);
5256 }
5257
5258 /*
5259 * update the inp_vflags on an endpoint
5260 */
5261 static void
sctp_update_ep_vflag(struct sctp_inpcb * inp)5262 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5263 {
5264 struct sctp_laddr *laddr;
5265
5266 /* first clear the flag */
5267 inp->ip_inp.inp.inp_vflag = 0;
5268 /* set the flag based on addresses on the ep list */
5269 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5270 if (laddr->ifa == NULL) {
5271 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5272 __func__);
5273 continue;
5274 }
5275
5276 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5277 continue;
5278 }
5279 switch (laddr->ifa->address.sa.sa_family) {
5280 #ifdef INET6
5281 case AF_INET6:
5282 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5283 break;
5284 #endif
5285 #ifdef INET
5286 case AF_INET:
5287 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5288 break;
5289 #endif
5290 default:
5291 break;
5292 }
5293 }
5294 }
5295
5296 /*
5297 * Add the address to the endpoint local address list There is nothing to be
5298 * done if we are bound to all addresses
5299 */
5300 void
sctp_add_local_addr_ep(struct sctp_inpcb * inp,struct sctp_ifa * ifa,uint32_t action)5301 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5302 {
5303 struct sctp_laddr *laddr;
5304 struct sctp_tcb *stcb;
5305 int fnd, error = 0;
5306
5307 fnd = 0;
5308
5309 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5310 /* You are already bound to all. You have it already */
5311 return;
5312 }
5313 #ifdef INET6
5314 if (ifa->address.sa.sa_family == AF_INET6) {
5315 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5316 /* Can't bind a non-useable addr. */
5317 return;
5318 }
5319 }
5320 #endif
5321 /* first, is it already present? */
5322 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5323 if (laddr->ifa == ifa) {
5324 fnd = 1;
5325 break;
5326 }
5327 }
5328
5329 if (fnd == 0) {
5330 /* Not in the ep list */
5331 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5332 if (error != 0)
5333 return;
5334 inp->laddr_count++;
5335 /* update inp_vflag flags */
5336 switch (ifa->address.sa.sa_family) {
5337 #ifdef INET6
5338 case AF_INET6:
5339 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5340 break;
5341 #endif
5342 #ifdef INET
5343 case AF_INET:
5344 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5345 break;
5346 #endif
5347 default:
5348 break;
5349 }
5350 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5351 sctp_add_local_addr_restricted(stcb, ifa);
5352 }
5353 }
5354 return;
5355 }
5356
5357 /*
5358 * select a new (hopefully reachable) destination net (should only be used
5359 * when we deleted an ep addr that is the only usable source address to reach
5360 * the destination net)
5361 */
5362 static void
sctp_select_primary_destination(struct sctp_tcb * stcb)5363 sctp_select_primary_destination(struct sctp_tcb *stcb)
5364 {
5365 struct sctp_nets *net;
5366
5367 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5368 /* for now, we'll just pick the first reachable one we find */
5369 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5370 continue;
5371 if (sctp_destination_is_reachable(stcb,
5372 (struct sockaddr *)&net->ro._l_addr)) {
5373 /* found a reachable destination */
5374 stcb->asoc.primary_destination = net;
5375 }
5376 }
5377 /* I can't there from here! ...we're gonna die shortly... */
5378 }
5379
5380 /*
5381 * Delete the address from the endpoint local address list. There is nothing
5382 * to be done if we are bound to all addresses
5383 */
5384 void
sctp_del_local_addr_ep(struct sctp_inpcb * inp,struct sctp_ifa * ifa)5385 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5386 {
5387 struct sctp_laddr *laddr;
5388 int fnd;
5389
5390 fnd = 0;
5391 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5392 /* You are already bound to all. You have it already */
5393 return;
5394 }
5395 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5396 if (laddr->ifa == ifa) {
5397 fnd = 1;
5398 break;
5399 }
5400 }
5401 if (fnd && (inp->laddr_count < 2)) {
5402 /* can't delete unless there are at LEAST 2 addresses */
5403 return;
5404 }
5405 if (fnd) {
5406 /*
5407 * clean up any use of this address go through our
5408 * associations and clear any last_used_address that match
5409 * this one for each assoc, see if a new primary_destination
5410 * is needed
5411 */
5412 struct sctp_tcb *stcb;
5413
5414 /* clean up "next_addr_touse" */
5415 if (inp->next_addr_touse == laddr)
5416 /* delete this address */
5417 inp->next_addr_touse = NULL;
5418
5419 /* clean up "last_used_address" */
5420 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5421 struct sctp_nets *net;
5422
5423 SCTP_TCB_LOCK(stcb);
5424 if (stcb->asoc.last_used_address == laddr)
5425 /* delete this address */
5426 stcb->asoc.last_used_address = NULL;
5427 /*
5428 * Now spin through all the nets and purge any ref
5429 * to laddr
5430 */
5431 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5432 if (net->ro._s_addr == laddr->ifa) {
5433 /* Yep, purge src address selected */
5434 RO_NHFREE(&net->ro);
5435 sctp_free_ifa(net->ro._s_addr);
5436 net->ro._s_addr = NULL;
5437 net->src_addr_selected = 0;
5438 }
5439 }
5440 SCTP_TCB_UNLOCK(stcb);
5441 } /* for each tcb */
5442 /* remove it from the ep list */
5443 sctp_remove_laddr(laddr);
5444 inp->laddr_count--;
5445 /* update inp_vflag flags */
5446 sctp_update_ep_vflag(inp);
5447 }
5448 return;
5449 }
5450
5451 /*
5452 * Add the address to the TCB local address restricted list.
5453 * This is a "pending" address list (eg. addresses waiting for an
5454 * ASCONF-ACK response) and cannot be used as a valid source address.
5455 */
5456 void
sctp_add_local_addr_restricted(struct sctp_tcb * stcb,struct sctp_ifa * ifa)5457 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5458 {
5459 struct sctp_laddr *laddr;
5460 struct sctpladdr *list;
5461
5462 /*
5463 * Assumes TCB is locked.. and possibly the INP. May need to
5464 * confirm/fix that if we need it and is not the case.
5465 */
5466 list = &stcb->asoc.sctp_restricted_addrs;
5467
5468 #ifdef INET6
5469 if (ifa->address.sa.sa_family == AF_INET6) {
5470 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5471 /* Can't bind a non-existent addr. */
5472 return;
5473 }
5474 }
5475 #endif
5476 /* does the address already exist? */
5477 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5478 if (laddr->ifa == ifa) {
5479 return;
5480 }
5481 }
5482
5483 /* add to the list */
5484 (void)sctp_insert_laddr(list, ifa, 0);
5485 return;
5486 }
5487
5488 /*
5489 * Remove a local address from the TCB local address restricted list
5490 */
5491 void
sctp_del_local_addr_restricted(struct sctp_tcb * stcb,struct sctp_ifa * ifa)5492 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5493 {
5494 struct sctp_inpcb *inp;
5495 struct sctp_laddr *laddr;
5496
5497 /*
5498 * This is called by asconf work. It is assumed that a) The TCB is
5499 * locked and b) The INP is locked. This is true in as much as I can
5500 * trace through the entry asconf code where I did these locks.
5501 * Again, the ASCONF code is a bit different in that it does lock
5502 * the INP during its work often times. This must be since we don't
5503 * want other proc's looking up things while what they are looking
5504 * up is changing :-D
5505 */
5506
5507 inp = stcb->sctp_ep;
5508 /* if subset bound and don't allow ASCONF's, can't delete last */
5509 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5510 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5511 if (stcb->sctp_ep->laddr_count < 2) {
5512 /* can't delete last address */
5513 return;
5514 }
5515 }
5516 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5517 /* remove the address if it exists */
5518 if (laddr->ifa == NULL)
5519 continue;
5520 if (laddr->ifa == ifa) {
5521 sctp_remove_laddr(laddr);
5522 return;
5523 }
5524 }
5525
5526 /* address not found! */
5527 return;
5528 }
5529
5530 /* sysctl */
5531 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5532 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5533
5534 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5535 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5536 int *sctp_cpuarry = NULL;
5537
5538 void
sctp_queue_to_mcore(struct mbuf * m,int off,int cpu_to_use)5539 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5540 {
5541 /* Queue a packet to a processor for the specified core */
5542 struct sctp_mcore_queue *qent;
5543 struct sctp_mcore_ctrl *wkq;
5544 int need_wake = 0;
5545
5546 if (sctp_mcore_workers == NULL) {
5547 /* Something went way bad during setup */
5548 sctp_input_with_port(m, off, 0);
5549 return;
5550 }
5551 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5552 (sizeof(struct sctp_mcore_queue)),
5553 SCTP_M_MCORE);
5554 if (qent == NULL) {
5555 /* This is trouble */
5556 sctp_input_with_port(m, off, 0);
5557 return;
5558 }
5559 qent->vn = curvnet;
5560 qent->m = m;
5561 qent->off = off;
5562 qent->v6 = 0;
5563 wkq = &sctp_mcore_workers[cpu_to_use];
5564 SCTP_MCORE_QLOCK(wkq);
5565
5566 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5567 if (wkq->running == 0) {
5568 need_wake = 1;
5569 }
5570 SCTP_MCORE_QUNLOCK(wkq);
5571 if (need_wake) {
5572 wakeup(&wkq->running);
5573 }
5574 }
5575
5576 static void
sctp_mcore_thread(void * arg)5577 sctp_mcore_thread(void *arg)
5578 {
5579
5580 struct sctp_mcore_ctrl *wkq;
5581 struct sctp_mcore_queue *qent;
5582
5583 wkq = (struct sctp_mcore_ctrl *)arg;
5584 struct mbuf *m;
5585 int off, v6;
5586
5587 /* Wait for first tickle */
5588 SCTP_MCORE_LOCK(wkq);
5589 wkq->running = 0;
5590 msleep(&wkq->running,
5591 &wkq->core_mtx,
5592 0, "wait for pkt", 0);
5593 SCTP_MCORE_UNLOCK(wkq);
5594
5595 /* Bind to our cpu */
5596 thread_lock(curthread);
5597 sched_bind(curthread, wkq->cpuid);
5598 thread_unlock(curthread);
5599
5600 /* Now lets start working */
5601 SCTP_MCORE_LOCK(wkq);
5602 /* Now grab lock and go */
5603 for (;;) {
5604 SCTP_MCORE_QLOCK(wkq);
5605 skip_sleep:
5606 wkq->running = 1;
5607 qent = TAILQ_FIRST(&wkq->que);
5608 if (qent) {
5609 TAILQ_REMOVE(&wkq->que, qent, next);
5610 SCTP_MCORE_QUNLOCK(wkq);
5611 CURVNET_SET(qent->vn);
5612 m = qent->m;
5613 off = qent->off;
5614 v6 = qent->v6;
5615 SCTP_FREE(qent, SCTP_M_MCORE);
5616 if (v6 == 0) {
5617 sctp_input_with_port(m, off, 0);
5618 } else {
5619 SCTP_PRINTF("V6 not yet supported\n");
5620 sctp_m_freem(m);
5621 }
5622 CURVNET_RESTORE();
5623 SCTP_MCORE_QLOCK(wkq);
5624 }
5625 wkq->running = 0;
5626 if (!TAILQ_EMPTY(&wkq->que)) {
5627 goto skip_sleep;
5628 }
5629 SCTP_MCORE_QUNLOCK(wkq);
5630 msleep(&wkq->running,
5631 &wkq->core_mtx,
5632 0, "wait for pkt", 0);
5633 }
5634 }
5635
5636 static void
sctp_startup_mcore_threads(void)5637 sctp_startup_mcore_threads(void)
5638 {
5639 int i, cpu;
5640
5641 if (mp_ncpus == 1)
5642 return;
5643
5644 if (sctp_mcore_workers != NULL) {
5645 /*
5646 * Already been here in some previous vnet?
5647 */
5648 return;
5649 }
5650 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5651 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5652 SCTP_M_MCORE);
5653 if (sctp_mcore_workers == NULL) {
5654 /* TSNH I hope */
5655 return;
5656 }
5657 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5658 sizeof(struct sctp_mcore_ctrl)));
5659 /* Init the structures */
5660 for (i = 0; i <= mp_maxid; i++) {
5661 TAILQ_INIT(&sctp_mcore_workers[i].que);
5662 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5663 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5664 sctp_mcore_workers[i].cpuid = i;
5665 }
5666 if (sctp_cpuarry == NULL) {
5667 SCTP_MALLOC(sctp_cpuarry, int *,
5668 (mp_ncpus * sizeof(int)),
5669 SCTP_M_MCORE);
5670 i = 0;
5671 CPU_FOREACH(cpu) {
5672 sctp_cpuarry[i] = cpu;
5673 i++;
5674 }
5675 }
5676 /* Now start them all */
5677 CPU_FOREACH(cpu) {
5678 (void)kproc_create(sctp_mcore_thread,
5679 (void *)&sctp_mcore_workers[cpu],
5680 &sctp_mcore_workers[cpu].thread_proc,
5681 RFPROC,
5682 SCTP_KTHREAD_PAGES,
5683 SCTP_MCORE_NAME);
5684 }
5685 }
5686 #endif
5687
5688 void
sctp_pcb_init(void)5689 sctp_pcb_init(void)
5690 {
5691 /*
5692 * SCTP initialization for the PCB structures should be called by
5693 * the sctp_init() function.
5694 */
5695 int i;
5696 struct timeval tv;
5697
5698 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5699 /* error I was called twice */
5700 return;
5701 }
5702 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5703
5704 #if defined(SCTP_LOCAL_TRACE_BUF)
5705 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5706 #endif
5707 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5708 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5709 ((mp_maxid + 1) * sizeof(struct sctpstat)),
5710 SCTP_M_MCORE);
5711 #endif
5712 (void)SCTP_GETTIME_TIMEVAL(&tv);
5713 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5714 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5715 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5716 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5717 #else
5718 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5719 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5720 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5721 #endif
5722 /* init the empty list of (All) Endpoints */
5723 LIST_INIT(&SCTP_BASE_INFO(listhead));
5724
5725 /* init the hash table of endpoints */
5726 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5727 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5728 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5729 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5730 &SCTP_BASE_INFO(hashasocmark));
5731 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5732 &SCTP_BASE_INFO(hashmark));
5733 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5734 &SCTP_BASE_INFO(hashtcpmark));
5735 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5736 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5737 &SCTP_BASE_INFO(hashvrfmark));
5738
5739 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5740 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5741 /* init the zones */
5742 /*
5743 * FIX ME: Should check for NULL returns, but if it does fail we are
5744 * doomed to panic anyways... add later maybe.
5745 */
5746 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5747 sizeof(struct sctp_inpcb), maxsockets);
5748
5749 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5750 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5751
5752 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5753 sizeof(struct sctp_laddr),
5754 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5755
5756 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5757 sizeof(struct sctp_nets),
5758 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5759
5760 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5761 sizeof(struct sctp_tmit_chunk),
5762 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5763
5764 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5765 sizeof(struct sctp_queued_to_read),
5766 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5767
5768 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5769 sizeof(struct sctp_stream_queue_pending),
5770 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5771
5772 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5773 sizeof(struct sctp_asconf),
5774 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5775
5776 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5777 sizeof(struct sctp_asconf_ack),
5778 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5779
5780 /* Master Lock INIT for info structure */
5781 SCTP_INP_INFO_LOCK_INIT();
5782 SCTP_STATLOG_INIT_LOCK();
5783
5784 SCTP_IPI_COUNT_INIT();
5785 SCTP_IPI_ADDR_INIT();
5786 #ifdef SCTP_PACKET_LOGGING
5787 SCTP_IP_PKTLOG_INIT();
5788 #endif
5789 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5790
5791 SCTP_WQ_ADDR_INIT();
5792 /* not sure if we need all the counts */
5793 SCTP_BASE_INFO(ipi_count_ep) = 0;
5794 /* assoc/tcb zone info */
5795 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5796 /* local addrlist zone info */
5797 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5798 /* remote addrlist zone info */
5799 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5800 /* chunk info */
5801 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5802
5803 /* socket queue zone info */
5804 SCTP_BASE_INFO(ipi_count_readq) = 0;
5805
5806 /* stream out queue cont */
5807 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5808
5809 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5810 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5811
5812 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5813
5814 /* Init the TIMEWAIT list */
5815 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5816 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5817 }
5818 sctp_startup_iterator();
5819
5820 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5821 sctp_startup_mcore_threads();
5822 #endif
5823
5824 /*
5825 * INIT the default VRF which for BSD is the only one, other O/S's
5826 * may have more. But initially they must start with one and then
5827 * add the VRF's as addresses are added.
5828 */
5829 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5830 }
5831
5832 /*
5833 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5834 */
5835 void
sctp_pcb_finish(void)5836 sctp_pcb_finish(void)
5837 {
5838 struct sctp_vrflist *vrf_bucket;
5839 struct sctp_vrf *vrf, *nvrf;
5840 struct sctp_ifn *ifn, *nifn;
5841 struct sctp_ifa *ifa, *nifa;
5842 struct sctpvtaghead *chain;
5843 struct sctp_tagblock *twait_block, *prev_twait_block;
5844 struct sctp_laddr *wi, *nwi;
5845 int i;
5846 struct sctp_iterator *it, *nit;
5847
5848 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5849 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5850 return;
5851 }
5852 SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5853 /*
5854 * In FreeBSD the iterator thread never exits but we do clean up.
5855 * The only way FreeBSD reaches here is if we have VRF's but we
5856 * still add the ifdef to make it compile on old versions.
5857 */
5858 retry:
5859 SCTP_IPI_ITERATOR_WQ_LOCK();
5860 /*
5861 * sctp_iterator_worker() might be working on an it entry without
5862 * holding the lock. We won't find it on the list either and
5863 * continue and free/destroy it. While holding the lock, spin, to
5864 * avoid the race condition as sctp_iterator_worker() will have to
5865 * wait to re-acquire the lock.
5866 */
5867 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5868 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5869 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5870 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5871 DELAY(10);
5872 goto retry;
5873 }
5874 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5875 if (it->vn != curvnet) {
5876 continue;
5877 }
5878 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5879 if (it->function_atend != NULL) {
5880 (*it->function_atend) (it->pointer, it->val);
5881 }
5882 SCTP_FREE(it, SCTP_M_ITER);
5883 }
5884 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5885 SCTP_ITERATOR_LOCK();
5886 if ((sctp_it_ctl.cur_it) &&
5887 (sctp_it_ctl.cur_it->vn == curvnet)) {
5888 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5889 }
5890 SCTP_ITERATOR_UNLOCK();
5891 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5892 SCTP_WQ_ADDR_LOCK();
5893 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5894 LIST_REMOVE(wi, sctp_nxt_addr);
5895 SCTP_DECR_LADDR_COUNT();
5896 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5897 SCTP_FREE(wi->ifa, SCTP_M_IFA);
5898 }
5899 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5900 }
5901 SCTP_WQ_ADDR_UNLOCK();
5902
5903 /*
5904 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5905 * destroyed first).
5906 */
5907 SCTP_IPI_ADDR_WLOCK();
5908 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5909 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5910 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5911 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5912 /* free the ifa */
5913 LIST_REMOVE(ifa, next_bucket);
5914 LIST_REMOVE(ifa, next_ifa);
5915 SCTP_FREE(ifa, SCTP_M_IFA);
5916 }
5917 /* free the ifn */
5918 LIST_REMOVE(ifn, next_bucket);
5919 LIST_REMOVE(ifn, next_ifn);
5920 SCTP_FREE(ifn, SCTP_M_IFN);
5921 }
5922 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5923 /* free the vrf */
5924 LIST_REMOVE(vrf, next_vrf);
5925 SCTP_FREE(vrf, SCTP_M_VRF);
5926 }
5927 SCTP_IPI_ADDR_WUNLOCK();
5928 /* free the vrf hashes */
5929 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5930 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5931
5932 /*
5933 * free the TIMEWAIT list elements malloc'd in the function
5934 * sctp_add_vtag_to_timewait()...
5935 */
5936 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5937 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5938 if (!LIST_EMPTY(chain)) {
5939 prev_twait_block = NULL;
5940 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5941 if (prev_twait_block) {
5942 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5943 }
5944 prev_twait_block = twait_block;
5945 }
5946 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5947 }
5948 }
5949
5950 /* free the locks and mutexes */
5951 #ifdef SCTP_PACKET_LOGGING
5952 SCTP_IP_PKTLOG_DESTROY();
5953 #endif
5954 SCTP_IPI_ADDR_DESTROY();
5955 SCTP_STATLOG_DESTROY();
5956 SCTP_INP_INFO_LOCK_DESTROY();
5957
5958 SCTP_WQ_ADDR_DESTROY();
5959
5960 /* Get rid of other stuff too. */
5961 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5962 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5963 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5964 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5965 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5966 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5967
5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5975 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5976 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5977 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5978 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5979 #endif
5980 }
5981
5982 int
sctp_load_addresses_from_init(struct sctp_tcb * stcb,struct mbuf * m,int offset,int limit,struct sockaddr * src,struct sockaddr * dst,struct sockaddr * altsa,uint16_t port)5983 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5984 int offset, int limit,
5985 struct sockaddr *src, struct sockaddr *dst,
5986 struct sockaddr *altsa, uint16_t port)
5987 {
5988 /*
5989 * grub through the INIT pulling addresses and loading them to the
5990 * nets structure in the asoc. The from address in the mbuf should
5991 * also be loaded (if it is not already). This routine can be called
5992 * with either INIT or INIT-ACK's as long as the m points to the IP
5993 * packet and the offset points to the beginning of the parameters.
5994 */
5995 struct sctp_inpcb *inp;
5996 struct sctp_nets *net, *nnet, *net_tmp;
5997 struct sctp_paramhdr *phdr, param_buf;
5998 struct sctp_tcb *stcb_tmp;
5999 uint16_t ptype, plen;
6000 struct sockaddr *sa;
6001 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6002 struct sctp_auth_random *p_random = NULL;
6003 uint16_t random_len = 0;
6004 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6005 struct sctp_auth_hmac_algo *hmacs = NULL;
6006 uint16_t hmacs_len = 0;
6007 uint8_t saw_asconf = 0;
6008 uint8_t saw_asconf_ack = 0;
6009 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6010 struct sctp_auth_chunk_list *chunks = NULL;
6011 uint16_t num_chunks = 0;
6012 sctp_key_t *new_key;
6013 uint32_t keylen;
6014 int got_random = 0, got_hmacs = 0, got_chklist = 0;
6015 uint8_t peer_supports_ecn;
6016 uint8_t peer_supports_prsctp;
6017 uint8_t peer_supports_auth;
6018 uint8_t peer_supports_asconf;
6019 uint8_t peer_supports_asconf_ack;
6020 uint8_t peer_supports_reconfig;
6021 uint8_t peer_supports_nrsack;
6022 uint8_t peer_supports_pktdrop;
6023 uint8_t peer_supports_idata;
6024 #ifdef INET
6025 struct sockaddr_in sin;
6026 #endif
6027 #ifdef INET6
6028 struct sockaddr_in6 sin6;
6029 #endif
6030
6031 /* First get the destination address setup too. */
6032 #ifdef INET
6033 memset(&sin, 0, sizeof(sin));
6034 sin.sin_family = AF_INET;
6035 sin.sin_len = sizeof(sin);
6036 sin.sin_port = stcb->rport;
6037 #endif
6038 #ifdef INET6
6039 memset(&sin6, 0, sizeof(sin6));
6040 sin6.sin6_family = AF_INET6;
6041 sin6.sin6_len = sizeof(struct sockaddr_in6);
6042 sin6.sin6_port = stcb->rport;
6043 #endif
6044 if (altsa) {
6045 sa = altsa;
6046 } else {
6047 sa = src;
6048 }
6049 peer_supports_idata = 0;
6050 peer_supports_ecn = 0;
6051 peer_supports_prsctp = 0;
6052 peer_supports_auth = 0;
6053 peer_supports_asconf = 0;
6054 peer_supports_asconf_ack = 0;
6055 peer_supports_reconfig = 0;
6056 peer_supports_nrsack = 0;
6057 peer_supports_pktdrop = 0;
6058 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6059 /* mark all addresses that we have currently on the list */
6060 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6061 }
6062 /* does the source address already exist? if so skip it */
6063 inp = stcb->sctp_ep;
6064 atomic_add_int(&stcb->asoc.refcnt, 1);
6065 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6066 atomic_add_int(&stcb->asoc.refcnt, -1);
6067
6068 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6069 /* we must add the source address */
6070 /* no scope set here since we have a tcb already. */
6071 switch (sa->sa_family) {
6072 #ifdef INET
6073 case AF_INET:
6074 if (stcb->asoc.scope.ipv4_addr_legal) {
6075 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6076 return (-1);
6077 }
6078 }
6079 break;
6080 #endif
6081 #ifdef INET6
6082 case AF_INET6:
6083 if (stcb->asoc.scope.ipv6_addr_legal) {
6084 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6085 return (-2);
6086 }
6087 }
6088 break;
6089 #endif
6090 default:
6091 break;
6092 }
6093 } else {
6094 if (net_tmp != NULL && stcb_tmp == stcb) {
6095 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6096 } else if (stcb_tmp != stcb) {
6097 /* It belongs to another association? */
6098 if (stcb_tmp)
6099 SCTP_TCB_UNLOCK(stcb_tmp);
6100 return (-3);
6101 }
6102 }
6103 if (stcb->asoc.state == 0) {
6104 /* the assoc was freed? */
6105 return (-4);
6106 }
6107 /* now we must go through each of the params. */
6108 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
6109 while (phdr) {
6110 ptype = ntohs(phdr->param_type);
6111 plen = ntohs(phdr->param_length);
6112 /*
6113 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6114 * (uint32_t)ptype, (int)plen);
6115 */
6116 if (offset + plen > limit) {
6117 break;
6118 }
6119 if (plen < sizeof(struct sctp_paramhdr)) {
6120 break;
6121 }
6122 #ifdef INET
6123 if (ptype == SCTP_IPV4_ADDRESS) {
6124 if (stcb->asoc.scope.ipv4_addr_legal) {
6125 struct sctp_ipv4addr_param *p4, p4_buf;
6126
6127 /* ok get the v4 address and check/add */
6128 phdr = sctp_get_next_param(m, offset,
6129 (struct sctp_paramhdr *)&p4_buf,
6130 sizeof(p4_buf));
6131 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6132 phdr == NULL) {
6133 return (-5);
6134 }
6135 p4 = (struct sctp_ipv4addr_param *)phdr;
6136 sin.sin_addr.s_addr = p4->addr;
6137 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6138 /* Skip multi-cast addresses */
6139 goto next_param;
6140 }
6141 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6142 (sin.sin_addr.s_addr == INADDR_ANY)) {
6143 goto next_param;
6144 }
6145 sa = (struct sockaddr *)&sin;
6146 inp = stcb->sctp_ep;
6147 atomic_add_int(&stcb->asoc.refcnt, 1);
6148 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6149 dst, stcb);
6150 atomic_add_int(&stcb->asoc.refcnt, -1);
6151
6152 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6153 inp == NULL) {
6154 /* we must add the source address */
6155 /*
6156 * no scope set since we have a tcb
6157 * already
6158 */
6159
6160 /*
6161 * we must validate the state again
6162 * here
6163 */
6164 add_it_now:
6165 if (stcb->asoc.state == 0) {
6166 /* the assoc was freed? */
6167 return (-7);
6168 }
6169 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6170 return (-8);
6171 }
6172 } else if (stcb_tmp == stcb) {
6173 if (stcb->asoc.state == 0) {
6174 /* the assoc was freed? */
6175 return (-10);
6176 }
6177 if (net != NULL) {
6178 /* clear flag */
6179 net->dest_state &=
6180 ~SCTP_ADDR_NOT_IN_ASSOC;
6181 }
6182 } else {
6183 /*
6184 * strange, address is in another
6185 * assoc? straighten out locks.
6186 */
6187 if (stcb_tmp) {
6188 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6189 struct mbuf *op_err;
6190 char msg[SCTP_DIAG_INFO_LEN];
6191
6192 /*
6193 * in setup state we
6194 * abort this guy
6195 */
6196 SCTP_SNPRINTF(msg, sizeof(msg),
6197 "%s:%d at %s", __FILE__, __LINE__, __func__);
6198 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6199 msg);
6200 sctp_abort_an_association(stcb_tmp->sctp_ep,
6201 stcb_tmp, op_err,
6202 SCTP_SO_NOT_LOCKED);
6203 goto add_it_now;
6204 }
6205 SCTP_TCB_UNLOCK(stcb_tmp);
6206 }
6207
6208 if (stcb->asoc.state == 0) {
6209 /* the assoc was freed? */
6210 return (-12);
6211 }
6212 return (-13);
6213 }
6214 }
6215 } else
6216 #endif
6217 #ifdef INET6
6218 if (ptype == SCTP_IPV6_ADDRESS) {
6219 if (stcb->asoc.scope.ipv6_addr_legal) {
6220 /* ok get the v6 address and check/add */
6221 struct sctp_ipv6addr_param *p6, p6_buf;
6222
6223 phdr = sctp_get_next_param(m, offset,
6224 (struct sctp_paramhdr *)&p6_buf,
6225 sizeof(p6_buf));
6226 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6227 phdr == NULL) {
6228 return (-14);
6229 }
6230 p6 = (struct sctp_ipv6addr_param *)phdr;
6231 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6232 sizeof(p6->addr));
6233 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6234 /* Skip multi-cast addresses */
6235 goto next_param;
6236 }
6237 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6238 /*
6239 * Link local make no sense without
6240 * scope
6241 */
6242 goto next_param;
6243 }
6244 sa = (struct sockaddr *)&sin6;
6245 inp = stcb->sctp_ep;
6246 atomic_add_int(&stcb->asoc.refcnt, 1);
6247 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6248 dst, stcb);
6249 atomic_add_int(&stcb->asoc.refcnt, -1);
6250 if (stcb_tmp == NULL &&
6251 (inp == stcb->sctp_ep || inp == NULL)) {
6252 /*
6253 * we must validate the state again
6254 * here
6255 */
6256 add_it_now6:
6257 if (stcb->asoc.state == 0) {
6258 /* the assoc was freed? */
6259 return (-16);
6260 }
6261 /*
6262 * we must add the address, no scope
6263 * set
6264 */
6265 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6266 return (-17);
6267 }
6268 } else if (stcb_tmp == stcb) {
6269 /*
6270 * we must validate the state again
6271 * here
6272 */
6273 if (stcb->asoc.state == 0) {
6274 /* the assoc was freed? */
6275 return (-19);
6276 }
6277 if (net != NULL) {
6278 /* clear flag */
6279 net->dest_state &=
6280 ~SCTP_ADDR_NOT_IN_ASSOC;
6281 }
6282 } else {
6283 /*
6284 * strange, address is in another
6285 * assoc? straighten out locks.
6286 */
6287 if (stcb_tmp) {
6288 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6289 struct mbuf *op_err;
6290 char msg[SCTP_DIAG_INFO_LEN];
6291
6292 /*
6293 * in setup state we
6294 * abort this guy
6295 */
6296 SCTP_SNPRINTF(msg, sizeof(msg),
6297 "%s:%d at %s", __FILE__, __LINE__, __func__);
6298 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6299 msg);
6300 sctp_abort_an_association(stcb_tmp->sctp_ep,
6301 stcb_tmp, op_err,
6302 SCTP_SO_NOT_LOCKED);
6303 goto add_it_now6;
6304 }
6305 SCTP_TCB_UNLOCK(stcb_tmp);
6306 }
6307 if (stcb->asoc.state == 0) {
6308 /* the assoc was freed? */
6309 return (-21);
6310 }
6311 return (-22);
6312 }
6313 }
6314 } else
6315 #endif
6316 if (ptype == SCTP_ECN_CAPABLE) {
6317 peer_supports_ecn = 1;
6318 } else if (ptype == SCTP_ULP_ADAPTATION) {
6319 if (stcb->asoc.state != SCTP_STATE_OPEN) {
6320 struct sctp_adaptation_layer_indication ai,
6321 *aip;
6322
6323 phdr = sctp_get_next_param(m, offset,
6324 (struct sctp_paramhdr *)&ai, sizeof(ai));
6325 aip = (struct sctp_adaptation_layer_indication *)phdr;
6326 if (aip) {
6327 stcb->asoc.peers_adaptation = ntohl(aip->indication);
6328 stcb->asoc.adaptation_needed = 1;
6329 }
6330 }
6331 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6332 struct sctp_asconf_addr_param lstore, *fee;
6333 int lptype;
6334 struct sockaddr *lsa = NULL;
6335 #ifdef INET
6336 struct sctp_asconf_addrv4_param *fii;
6337 #endif
6338
6339 if (stcb->asoc.asconf_supported == 0) {
6340 return (-100);
6341 }
6342 if (plen > sizeof(lstore)) {
6343 return (-23);
6344 }
6345 if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6346 return (-101);
6347 }
6348 phdr = sctp_get_next_param(m, offset,
6349 (struct sctp_paramhdr *)&lstore,
6350 plen);
6351 if (phdr == NULL) {
6352 return (-24);
6353 }
6354 fee = (struct sctp_asconf_addr_param *)phdr;
6355 lptype = ntohs(fee->addrp.ph.param_type);
6356 switch (lptype) {
6357 #ifdef INET
6358 case SCTP_IPV4_ADDRESS:
6359 if (plen !=
6360 sizeof(struct sctp_asconf_addrv4_param)) {
6361 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6362 (int)sizeof(struct sctp_asconf_addrv4_param),
6363 plen);
6364 } else {
6365 fii = (struct sctp_asconf_addrv4_param *)fee;
6366 sin.sin_addr.s_addr = fii->addrp.addr;
6367 lsa = (struct sockaddr *)&sin;
6368 }
6369 break;
6370 #endif
6371 #ifdef INET6
6372 case SCTP_IPV6_ADDRESS:
6373 if (plen !=
6374 sizeof(struct sctp_asconf_addr_param)) {
6375 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6376 (int)sizeof(struct sctp_asconf_addr_param),
6377 plen);
6378 } else {
6379 memcpy(sin6.sin6_addr.s6_addr,
6380 fee->addrp.addr,
6381 sizeof(fee->addrp.addr));
6382 lsa = (struct sockaddr *)&sin6;
6383 }
6384 break;
6385 #endif
6386 default:
6387 break;
6388 }
6389 if (lsa) {
6390 (void)sctp_set_primary_addr(stcb, sa, NULL);
6391 }
6392 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6393 stcb->asoc.peer_supports_nat = 1;
6394 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6395 /* Peer supports pr-sctp */
6396 peer_supports_prsctp = 1;
6397 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6398 /* A supported extension chunk */
6399 struct sctp_supported_chunk_types_param *pr_supported;
6400 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6401 int num_ent, i;
6402
6403 if (plen > sizeof(local_store)) {
6404 return (-35);
6405 }
6406 phdr = sctp_get_next_param(m, offset,
6407 (struct sctp_paramhdr *)&local_store, plen);
6408 if (phdr == NULL) {
6409 return (-25);
6410 }
6411 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6412 num_ent = plen - sizeof(struct sctp_paramhdr);
6413 for (i = 0; i < num_ent; i++) {
6414 switch (pr_supported->chunk_types[i]) {
6415 case SCTP_ASCONF:
6416 peer_supports_asconf = 1;
6417 break;
6418 case SCTP_ASCONF_ACK:
6419 peer_supports_asconf_ack = 1;
6420 break;
6421 case SCTP_FORWARD_CUM_TSN:
6422 peer_supports_prsctp = 1;
6423 break;
6424 case SCTP_PACKET_DROPPED:
6425 peer_supports_pktdrop = 1;
6426 break;
6427 case SCTP_NR_SELECTIVE_ACK:
6428 peer_supports_nrsack = 1;
6429 break;
6430 case SCTP_STREAM_RESET:
6431 peer_supports_reconfig = 1;
6432 break;
6433 case SCTP_AUTHENTICATION:
6434 peer_supports_auth = 1;
6435 break;
6436 case SCTP_IDATA:
6437 peer_supports_idata = 1;
6438 break;
6439 default:
6440 /* one I have not learned yet */
6441 break;
6442 }
6443 }
6444 } else if (ptype == SCTP_RANDOM) {
6445 if (plen > sizeof(random_store))
6446 break;
6447 if (got_random) {
6448 /* already processed a RANDOM */
6449 goto next_param;
6450 }
6451 phdr = sctp_get_next_param(m, offset,
6452 (struct sctp_paramhdr *)random_store,
6453 plen);
6454 if (phdr == NULL)
6455 return (-26);
6456 p_random = (struct sctp_auth_random *)phdr;
6457 random_len = plen - sizeof(*p_random);
6458 /* enforce the random length */
6459 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6460 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6461 return (-27);
6462 }
6463 got_random = 1;
6464 } else if (ptype == SCTP_HMAC_LIST) {
6465 uint16_t num_hmacs;
6466 uint16_t i;
6467
6468 if (plen > sizeof(hmacs_store))
6469 break;
6470 if (got_hmacs) {
6471 /* already processed a HMAC list */
6472 goto next_param;
6473 }
6474 phdr = sctp_get_next_param(m, offset,
6475 (struct sctp_paramhdr *)hmacs_store,
6476 plen);
6477 if (phdr == NULL)
6478 return (-28);
6479 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6480 hmacs_len = plen - sizeof(*hmacs);
6481 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6482 /* validate the hmac list */
6483 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6484 return (-29);
6485 }
6486 if (stcb->asoc.peer_hmacs != NULL)
6487 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6488 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6489 if (stcb->asoc.peer_hmacs != NULL) {
6490 for (i = 0; i < num_hmacs; i++) {
6491 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6492 ntohs(hmacs->hmac_ids[i]));
6493 }
6494 }
6495 got_hmacs = 1;
6496 } else if (ptype == SCTP_CHUNK_LIST) {
6497 int i;
6498
6499 if (plen > sizeof(chunks_store))
6500 break;
6501 if (got_chklist) {
6502 /* already processed a Chunks list */
6503 goto next_param;
6504 }
6505 phdr = sctp_get_next_param(m, offset,
6506 (struct sctp_paramhdr *)chunks_store,
6507 plen);
6508 if (phdr == NULL)
6509 return (-30);
6510 chunks = (struct sctp_auth_chunk_list *)phdr;
6511 num_chunks = plen - sizeof(*chunks);
6512 if (stcb->asoc.peer_auth_chunks != NULL)
6513 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6514 else
6515 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6516 for (i = 0; i < num_chunks; i++) {
6517 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6518 stcb->asoc.peer_auth_chunks);
6519 /* record asconf/asconf-ack if listed */
6520 if (chunks->chunk_types[i] == SCTP_ASCONF)
6521 saw_asconf = 1;
6522 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6523 saw_asconf_ack = 1;
6524 }
6525 got_chklist = 1;
6526 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6527 (ptype == SCTP_STATE_COOKIE) ||
6528 (ptype == SCTP_UNRECOG_PARAM) ||
6529 (ptype == SCTP_COOKIE_PRESERVE) ||
6530 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6531 (ptype == SCTP_ADD_IP_ADDRESS) ||
6532 (ptype == SCTP_DEL_IP_ADDRESS) ||
6533 (ptype == SCTP_ERROR_CAUSE_IND) ||
6534 (ptype == SCTP_SUCCESS_REPORT)) {
6535 /* don't care */
6536 } else {
6537 if ((ptype & 0x8000) == 0x0000) {
6538 /*
6539 * must stop processing the rest of the
6540 * param's. Any report bits were handled
6541 * with the call to
6542 * sctp_arethere_unrecognized_parameters()
6543 * when the INIT or INIT-ACK was first seen.
6544 */
6545 break;
6546 }
6547 }
6548
6549 next_param:
6550 offset += SCTP_SIZE32(plen);
6551 if (offset >= limit) {
6552 break;
6553 }
6554 phdr = sctp_get_next_param(m, offset, ¶m_buf,
6555 sizeof(param_buf));
6556 }
6557 /* Now check to see if we need to purge any addresses */
6558 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6559 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6560 SCTP_ADDR_NOT_IN_ASSOC) {
6561 /* This address has been removed from the asoc */
6562 /* remove and free it */
6563 stcb->asoc.numnets--;
6564 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6565 sctp_free_remote_addr(net);
6566 if (net == stcb->asoc.primary_destination) {
6567 stcb->asoc.primary_destination = NULL;
6568 sctp_select_primary_destination(stcb);
6569 }
6570 }
6571 }
6572 if ((stcb->asoc.ecn_supported == 1) &&
6573 (peer_supports_ecn == 0)) {
6574 stcb->asoc.ecn_supported = 0;
6575 }
6576 if ((stcb->asoc.prsctp_supported == 1) &&
6577 (peer_supports_prsctp == 0)) {
6578 stcb->asoc.prsctp_supported = 0;
6579 }
6580 if ((stcb->asoc.auth_supported == 1) &&
6581 ((peer_supports_auth == 0) ||
6582 (got_random == 0) || (got_hmacs == 0))) {
6583 stcb->asoc.auth_supported = 0;
6584 }
6585 if ((stcb->asoc.asconf_supported == 1) &&
6586 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6587 (stcb->asoc.auth_supported == 0) ||
6588 (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6589 stcb->asoc.asconf_supported = 0;
6590 }
6591 if ((stcb->asoc.reconfig_supported == 1) &&
6592 (peer_supports_reconfig == 0)) {
6593 stcb->asoc.reconfig_supported = 0;
6594 }
6595 if ((stcb->asoc.idata_supported == 1) &&
6596 (peer_supports_idata == 0)) {
6597 stcb->asoc.idata_supported = 0;
6598 }
6599 if ((stcb->asoc.nrsack_supported == 1) &&
6600 (peer_supports_nrsack == 0)) {
6601 stcb->asoc.nrsack_supported = 0;
6602 }
6603 if ((stcb->asoc.pktdrop_supported == 1) &&
6604 (peer_supports_pktdrop == 0)) {
6605 stcb->asoc.pktdrop_supported = 0;
6606 }
6607 /* validate authentication required parameters */
6608 if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6609 /* peer does not support auth but sent a chunks list? */
6610 return (-31);
6611 }
6612 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6613 /* peer supports asconf but not auth? */
6614 return (-32);
6615 } else if ((peer_supports_asconf == 1) &&
6616 (peer_supports_auth == 1) &&
6617 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6618 return (-33);
6619 }
6620 /* concatenate the full random key */
6621 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6622 if (chunks != NULL) {
6623 keylen += sizeof(*chunks) + num_chunks;
6624 }
6625 new_key = sctp_alloc_key(keylen);
6626 if (new_key != NULL) {
6627 /* copy in the RANDOM */
6628 if (p_random != NULL) {
6629 keylen = sizeof(*p_random) + random_len;
6630 memcpy(new_key->key, p_random, keylen);
6631 } else {
6632 keylen = 0;
6633 }
6634 /* append in the AUTH chunks */
6635 if (chunks != NULL) {
6636 memcpy(new_key->key + keylen, chunks,
6637 sizeof(*chunks) + num_chunks);
6638 keylen += sizeof(*chunks) + num_chunks;
6639 }
6640 /* append in the HMACs */
6641 if (hmacs != NULL) {
6642 memcpy(new_key->key + keylen, hmacs,
6643 sizeof(*hmacs) + hmacs_len);
6644 }
6645 } else {
6646 /* failed to get memory for the key */
6647 return (-34);
6648 }
6649 if (stcb->asoc.authinfo.peer_random != NULL)
6650 sctp_free_key(stcb->asoc.authinfo.peer_random);
6651 stcb->asoc.authinfo.peer_random = new_key;
6652 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6653 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6654
6655 return (0);
6656 }
6657
6658 int
sctp_set_primary_addr(struct sctp_tcb * stcb,struct sockaddr * sa,struct sctp_nets * net)6659 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6660 struct sctp_nets *net)
6661 {
6662 /* make sure the requested primary address exists in the assoc */
6663 if (net == NULL && sa)
6664 net = sctp_findnet(stcb, sa);
6665
6666 if (net == NULL) {
6667 /* didn't find the requested primary address! */
6668 return (-1);
6669 } else {
6670 /* set the primary address */
6671 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6672 /* Must be confirmed, so queue to set */
6673 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6674 return (0);
6675 }
6676 stcb->asoc.primary_destination = net;
6677 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6678 sctp_free_remote_addr(stcb->asoc.alternate);
6679 stcb->asoc.alternate = NULL;
6680 }
6681 net = TAILQ_FIRST(&stcb->asoc.nets);
6682 if (net != stcb->asoc.primary_destination) {
6683 /*
6684 * first one on the list is NOT the primary
6685 * sctp_cmpaddr() is much more efficient if the
6686 * primary is the first on the list, make it so.
6687 */
6688 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6689 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6690 }
6691 return (0);
6692 }
6693 }
6694
6695 int
sctp_is_vtag_good(uint32_t tag,uint16_t lport,uint16_t rport,struct timeval * now)6696 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6697 {
6698 /*
6699 * This function serves two purposes. It will see if a TAG can be
6700 * re-used and return 1 for yes it is ok and 0 for don't use that
6701 * tag. A secondary function it will do is purge out old tags that
6702 * can be removed.
6703 */
6704 struct sctpvtaghead *chain;
6705 struct sctp_tagblock *twait_block;
6706 struct sctpasochead *head;
6707 struct sctp_tcb *stcb;
6708 int i;
6709
6710 SCTP_INP_INFO_RLOCK();
6711 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6712 SCTP_BASE_INFO(hashasocmark))];
6713 LIST_FOREACH(stcb, head, sctp_asocs) {
6714 /*
6715 * We choose not to lock anything here. TCB's can't be
6716 * removed since we have the read lock, so they can't be
6717 * freed on us, same thing for the INP. I may be wrong with
6718 * this assumption, but we will go with it for now :-)
6719 */
6720 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6721 continue;
6722 }
6723 if (stcb->asoc.my_vtag == tag) {
6724 /* candidate */
6725 if (stcb->rport != rport) {
6726 continue;
6727 }
6728 if (stcb->sctp_ep->sctp_lport != lport) {
6729 continue;
6730 }
6731 /* Its a used tag set */
6732 SCTP_INP_INFO_RUNLOCK();
6733 return (0);
6734 }
6735 }
6736 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6737 /* Now what about timed wait ? */
6738 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6739 /*
6740 * Block(s) are present, lets see if we have this tag in the
6741 * list
6742 */
6743 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6744 if (twait_block->vtag_block[i].v_tag == 0) {
6745 /* not used */
6746 continue;
6747 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6748 now->tv_sec) {
6749 /* Audit expires this guy */
6750 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6751 twait_block->vtag_block[i].v_tag = 0;
6752 twait_block->vtag_block[i].lport = 0;
6753 twait_block->vtag_block[i].rport = 0;
6754 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6755 (twait_block->vtag_block[i].lport == lport) &&
6756 (twait_block->vtag_block[i].rport == rport)) {
6757 /* Bad tag, sorry :< */
6758 SCTP_INP_INFO_RUNLOCK();
6759 return (0);
6760 }
6761 }
6762 }
6763 SCTP_INP_INFO_RUNLOCK();
6764 return (1);
6765 }
6766
6767 static void
sctp_drain_mbufs(struct sctp_tcb * stcb)6768 sctp_drain_mbufs(struct sctp_tcb *stcb)
6769 {
6770 /*
6771 * We must hunt this association for MBUF's past the cumack (i.e.
6772 * out of order data that we can renege on).
6773 */
6774 struct sctp_association *asoc;
6775 struct sctp_tmit_chunk *chk, *nchk;
6776 uint32_t cumulative_tsn_p1;
6777 struct sctp_queued_to_read *control, *ncontrol;
6778 int cnt, strmat;
6779 uint32_t gap, i;
6780 int fnd = 0;
6781
6782 /* We look for anything larger than the cum-ack + 1 */
6783
6784 asoc = &stcb->asoc;
6785 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6786 /* none we can reneg on. */
6787 return;
6788 }
6789 SCTP_STAT_INCR(sctps_protocol_drains_done);
6790 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6791 cnt = 0;
6792 /* Ok that was fun, now we will drain all the inbound streams? */
6793 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6794 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6795 #ifdef INVARIANTS
6796 if (control->on_strm_q != SCTP_ON_ORDERED) {
6797 panic("Huh control: %p on_q: %d -- not ordered?",
6798 control, control->on_strm_q);
6799 }
6800 #endif
6801 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6802 /* Yep it is above cum-ack */
6803 cnt++;
6804 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6805 KASSERT(control->length > 0, ("control has zero length"));
6806 if (asoc->size_on_all_streams >= control->length) {
6807 asoc->size_on_all_streams -= control->length;
6808 } else {
6809 #ifdef INVARIANTS
6810 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6811 #else
6812 asoc->size_on_all_streams = 0;
6813 #endif
6814 }
6815 sctp_ucount_decr(asoc->cnt_on_all_streams);
6816 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6817 if (control->on_read_q) {
6818 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6819 control->on_read_q = 0;
6820 }
6821 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6822 control->on_strm_q = 0;
6823 if (control->data) {
6824 sctp_m_freem(control->data);
6825 control->data = NULL;
6826 }
6827 sctp_free_remote_addr(control->whoFrom);
6828 /* Now its reasm? */
6829 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6830 cnt++;
6831 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6832 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6833 if (asoc->size_on_reasm_queue >= chk->send_size) {
6834 asoc->size_on_reasm_queue -= chk->send_size;
6835 } else {
6836 #ifdef INVARIANTS
6837 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6838 #else
6839 asoc->size_on_reasm_queue = 0;
6840 #endif
6841 }
6842 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6843 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6844 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6845 if (chk->data) {
6846 sctp_m_freem(chk->data);
6847 chk->data = NULL;
6848 }
6849 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6850 }
6851 sctp_free_a_readq(stcb, control);
6852 }
6853 }
6854 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6855 #ifdef INVARIANTS
6856 if (control->on_strm_q != SCTP_ON_UNORDERED) {
6857 panic("Huh control: %p on_q: %d -- not unordered?",
6858 control, control->on_strm_q);
6859 }
6860 #endif
6861 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6862 /* Yep it is above cum-ack */
6863 cnt++;
6864 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6865 KASSERT(control->length > 0, ("control has zero length"));
6866 if (asoc->size_on_all_streams >= control->length) {
6867 asoc->size_on_all_streams -= control->length;
6868 } else {
6869 #ifdef INVARIANTS
6870 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6871 #else
6872 asoc->size_on_all_streams = 0;
6873 #endif
6874 }
6875 sctp_ucount_decr(asoc->cnt_on_all_streams);
6876 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6877 if (control->on_read_q) {
6878 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6879 control->on_read_q = 0;
6880 }
6881 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6882 control->on_strm_q = 0;
6883 if (control->data) {
6884 sctp_m_freem(control->data);
6885 control->data = NULL;
6886 }
6887 sctp_free_remote_addr(control->whoFrom);
6888 /* Now its reasm? */
6889 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6890 cnt++;
6891 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6892 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6893 if (asoc->size_on_reasm_queue >= chk->send_size) {
6894 asoc->size_on_reasm_queue -= chk->send_size;
6895 } else {
6896 #ifdef INVARIANTS
6897 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6898 #else
6899 asoc->size_on_reasm_queue = 0;
6900 #endif
6901 }
6902 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6903 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6904 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6905 if (chk->data) {
6906 sctp_m_freem(chk->data);
6907 chk->data = NULL;
6908 }
6909 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6910 }
6911 sctp_free_a_readq(stcb, control);
6912 }
6913 }
6914 }
6915 if (cnt) {
6916 /* We must back down to see what the new highest is */
6917 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6918 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6919 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6920 asoc->highest_tsn_inside_map = i;
6921 fnd = 1;
6922 break;
6923 }
6924 }
6925 if (!fnd) {
6926 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6927 }
6928
6929 /*
6930 * Question, should we go through the delivery queue? The
6931 * only reason things are on here is the app not reading OR
6932 * a p-d-api up. An attacker COULD send enough in to
6933 * initiate the PD-API and then send a bunch of stuff to
6934 * other streams... these would wind up on the delivery
6935 * queue.. and then we would not get to them. But in order
6936 * to do this I then have to back-track and un-deliver
6937 * sequence numbers in streams.. el-yucko. I think for now
6938 * we will NOT look at the delivery queue and leave it to be
6939 * something to consider later. An alternative would be to
6940 * abort the P-D-API with a notification and then deliver
6941 * the data.... Or another method might be to keep track of
6942 * how many times the situation occurs and if we see a
6943 * possible attack underway just abort the association.
6944 */
6945 #ifdef SCTP_DEBUG
6946 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6947 #endif
6948 /*
6949 * Now do we need to find a new
6950 * asoc->highest_tsn_inside_map?
6951 */
6952 asoc->last_revoke_count = cnt;
6953 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6954 SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6955 /* sa_ignore NO_NULL_CHK */
6956 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6957 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6958 }
6959 /*
6960 * Another issue, in un-setting the TSN's in the mapping array we
6961 * DID NOT adjust the highest_tsn marker. This will cause one of
6962 * two things to occur. It may cause us to do extra work in checking
6963 * for our mapping array movement. More importantly it may cause us
6964 * to SACK every datagram. This may not be a bad thing though since
6965 * we will recover once we get our cum-ack above and all this stuff
6966 * we dumped recovered.
6967 */
6968 }
6969
6970 void
sctp_drain()6971 sctp_drain()
6972 {
6973 /*
6974 * We must walk the PCB lists for ALL associations here. The system
6975 * is LOW on MBUF's and needs help. This is where reneging will
6976 * occur. We really hope this does NOT happen!
6977 */
6978 VNET_ITERATOR_DECL(vnet_iter);
6979 VNET_LIST_RLOCK_NOSLEEP();
6980 VNET_FOREACH(vnet_iter) {
6981 CURVNET_SET(vnet_iter);
6982 struct sctp_inpcb *inp;
6983 struct sctp_tcb *stcb;
6984
6985 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6986 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6987 #ifdef VIMAGE
6988 continue;
6989 #else
6990 return;
6991 #endif
6992 }
6993 SCTP_INP_INFO_RLOCK();
6994 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6995 /* For each endpoint */
6996 SCTP_INP_RLOCK(inp);
6997 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6998 /* For each association */
6999 SCTP_TCB_LOCK(stcb);
7000 sctp_drain_mbufs(stcb);
7001 SCTP_TCB_UNLOCK(stcb);
7002 }
7003 SCTP_INP_RUNLOCK(inp);
7004 }
7005 SCTP_INP_INFO_RUNLOCK();
7006 CURVNET_RESTORE();
7007 }
7008 VNET_LIST_RUNLOCK_NOSLEEP();
7009 }
7010
7011 /*
7012 * start a new iterator
7013 * iterates through all endpoints and associations based on the pcb_state
7014 * flags and asoc_state. "af" (mandatory) is executed for all matching
7015 * assocs and "ef" (optional) is executed when the iterator completes.
7016 * "inpf" (optional) is executed for each new endpoint as it is being
7017 * iterated through. inpe (optional) is called when the inp completes
7018 * its way through all the stcbs.
7019 */
7020 int
sctp_initiate_iterator(inp_func inpf,asoc_func af,inp_func inpe,uint32_t pcb_state,uint32_t pcb_features,uint32_t asoc_state,void * argp,uint32_t argi,end_func ef,struct sctp_inpcb * s_inp,uint8_t chunk_output_off)7021 sctp_initiate_iterator(inp_func inpf,
7022 asoc_func af,
7023 inp_func inpe,
7024 uint32_t pcb_state,
7025 uint32_t pcb_features,
7026 uint32_t asoc_state,
7027 void *argp,
7028 uint32_t argi,
7029 end_func ef,
7030 struct sctp_inpcb *s_inp,
7031 uint8_t chunk_output_off)
7032 {
7033 struct sctp_iterator *it = NULL;
7034
7035 if (af == NULL) {
7036 return (-1);
7037 }
7038 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7039 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7040 SCTP_BASE_VAR(sctp_pcb_initialized));
7041 return (-1);
7042 }
7043 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7044 SCTP_M_ITER);
7045 if (it == NULL) {
7046 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7047 return (-1);
7048 }
7049 memset(it, 0, sizeof(*it));
7050 it->function_assoc = af;
7051 it->function_inp = inpf;
7052 if (inpf)
7053 it->done_current_ep = 0;
7054 else
7055 it->done_current_ep = 1;
7056 it->function_atend = ef;
7057 it->pointer = argp;
7058 it->val = argi;
7059 it->pcb_flags = pcb_state;
7060 it->pcb_features = pcb_features;
7061 it->asoc_state = asoc_state;
7062 it->function_inp_end = inpe;
7063 it->no_chunk_output = chunk_output_off;
7064 it->vn = curvnet;
7065 if (s_inp) {
7066 /* Assume lock is held here */
7067 it->inp = s_inp;
7068 SCTP_INP_INCR_REF(it->inp);
7069 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7070 } else {
7071 SCTP_INP_INFO_RLOCK();
7072 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7073 if (it->inp) {
7074 SCTP_INP_INCR_REF(it->inp);
7075 }
7076 SCTP_INP_INFO_RUNLOCK();
7077 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7078 }
7079 SCTP_IPI_ITERATOR_WQ_LOCK();
7080 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7081 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7082 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7083 SCTP_BASE_VAR(sctp_pcb_initialized), it);
7084 SCTP_FREE(it, SCTP_M_ITER);
7085 return (-1);
7086 }
7087 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7088 if (sctp_it_ctl.iterator_running == 0) {
7089 sctp_wakeup_iterator();
7090 }
7091 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7092 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7093 return (0);
7094 }
7095