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 <netinet/sctp_os.h>
36 #include <sys/proc.h>
37 #include <netinet/sctp_var.h>
38 #include <netinet/sctp_sysctl.h>
39 #include <netinet/sctp_pcb.h>
40 #include <netinet/sctputil.h>
41 #include <netinet/sctp.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_asconf.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_timer.h>
46 #include <netinet/sctp_bsd_addr.h>
47 #if defined(INET) || defined(INET6)
48 #include <netinet/udp.h>
49 #endif
50 #ifdef INET6
51 #include <netinet6/ip6_var.h>
52 #endif
53 #include <sys/sched.h>
54 #include <sys/smp.h>
55 #include <sys/unistd.h>
56
57 /* FIX: we don't handle multiple link local scopes */
58 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
59 #ifdef INET6
60 int
SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 * a,struct sockaddr_in6 * b)61 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
62 {
63 struct sockaddr_in6 tmp_a, tmp_b;
64
65 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
66 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
67 return (0);
68 }
69 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
70 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
71 return (0);
72 }
73 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
74 }
75 #endif
76
77 void
sctp_fill_pcbinfo(struct sctp_pcbinfo * spcb)78 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
79 {
80 /*
81 * We really don't need to lock this, but I will just because it
82 * does not hurt.
83 */
84 SCTP_INP_INFO_RLOCK();
85 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
86 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
87 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
88 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
89 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
90 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
91 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
92 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
93 SCTP_INP_INFO_RUNLOCK();
94 }
95
96 /*-
97 * Addresses are added to VRF's (Virtual Router's). For BSD we
98 * have only the default VRF 0. We maintain a hash list of
99 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
100 * these has a list of addresses. When we add a new address
101 * to a VRF we lookup the ifn/ifn_index, if the ifn does
102 * not exist we create it and add it to the list of IFN's
103 * within the VRF. Once we have the sctp_ifn, we add the
104 * address to the list. So we look something like:
105 *
106 * hash-vrf-table
107 * vrf-> ifn-> ifn -> ifn
108 * vrf |
109 * ... +--ifa-> ifa -> ifa
110 * vrf
111 *
112 * We keep these separate lists since the SCTP subsystem will
113 * point to these from its source address selection nets structure.
114 * When an address is deleted it does not happen right away on
115 * the SCTP side, it gets scheduled. What we do when a
116 * delete happens is immediately remove the address from
117 * the master list and decrement the refcount. As our
118 * addip iterator works through and frees the src address
119 * selection pointing to the sctp_ifa, eventually the refcount
120 * will reach 0 and we will delete it. Note that it is assumed
121 * that any locking on system level ifn/ifa is done at the
122 * caller of these functions and these routines will only
123 * lock the SCTP structures as they add or delete things.
124 *
125 * Other notes on VRF concepts.
126 * - An endpoint can be in multiple VRF's
127 * - An association lives within a VRF and only one VRF.
128 * - Any incoming packet we can deduce the VRF for by
129 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
130 * - Any downward send call or connect call must supply the
131 * VRF via ancillary data or via some sort of set default
132 * VRF socket option call (again for BSD no brainer since
133 * the VRF is always 0).
134 * - An endpoint may add multiple VRF's to it.
135 * - Listening sockets can accept associations in any
136 * of the VRF's they are in but the assoc will end up
137 * in only one VRF (gotten from the packet or connect/send).
138 *
139 */
140
141 struct sctp_vrf *
sctp_allocate_vrf(int vrf_id)142 sctp_allocate_vrf(int vrf_id)
143 {
144 struct sctp_vrf *vrf = NULL;
145 struct sctp_vrflist *bucket;
146
147 /* First allocate the VRF structure */
148 vrf = sctp_find_vrf(vrf_id);
149 if (vrf) {
150 /* Already allocated */
151 return (vrf);
152 }
153 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
154 SCTP_M_VRF);
155 if (vrf == NULL) {
156 /* No memory */
157 #ifdef INVARIANTS
158 panic("No memory for VRF:%d", vrf_id);
159 #endif
160 return (NULL);
161 }
162 /* setup the VRF */
163 memset(vrf, 0, sizeof(struct sctp_vrf));
164 vrf->vrf_id = vrf_id;
165 LIST_INIT(&vrf->ifnlist);
166 vrf->total_ifa_count = 0;
167 vrf->refcount = 0;
168 /* now also setup table ids */
169 SCTP_INIT_VRF_TABLEID(vrf);
170 /* Init the HASH of addresses */
171 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
172 &vrf->vrf_addr_hashmark);
173 if (vrf->vrf_addr_hash == NULL) {
174 /* No memory */
175 #ifdef INVARIANTS
176 panic("No memory for VRF:%d", vrf_id);
177 #endif
178 SCTP_FREE(vrf, SCTP_M_VRF);
179 return (NULL);
180 }
181
182 /* Add it to the hash table */
183 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
184 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
185 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
186 return (vrf);
187 }
188
189 struct sctp_ifn *
sctp_find_ifn(void * ifn,uint32_t ifn_index)190 sctp_find_ifn(void *ifn, uint32_t ifn_index)
191 {
192 struct sctp_ifn *sctp_ifnp;
193 struct sctp_ifnlist *hash_ifn_head;
194
195 /*
196 * We assume the lock is held for the addresses if that's wrong
197 * problems could occur :-)
198 */
199 SCTP_IPI_ADDR_LOCK_ASSERT();
200 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
201 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
202 if (sctp_ifnp->ifn_index == ifn_index) {
203 return (sctp_ifnp);
204 }
205 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
206 return (sctp_ifnp);
207 }
208 }
209 return (NULL);
210 }
211
212 struct sctp_vrf *
sctp_find_vrf(uint32_t vrf_id)213 sctp_find_vrf(uint32_t vrf_id)
214 {
215 struct sctp_vrflist *bucket;
216 struct sctp_vrf *liste;
217
218 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
219 LIST_FOREACH(liste, bucket, next_vrf) {
220 if (vrf_id == liste->vrf_id) {
221 return (liste);
222 }
223 }
224 return (NULL);
225 }
226
227 void
sctp_free_vrf(struct sctp_vrf * vrf)228 sctp_free_vrf(struct sctp_vrf *vrf)
229 {
230 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
231 if (vrf->vrf_addr_hash) {
232 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
233 vrf->vrf_addr_hash = NULL;
234 }
235 /* We zero'd the count */
236 LIST_REMOVE(vrf, next_vrf);
237 SCTP_FREE(vrf, SCTP_M_VRF);
238 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
239 }
240 }
241
242 void
sctp_free_ifn(struct sctp_ifn * sctp_ifnp)243 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
244 {
245 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
246 /* We zero'd the count */
247 if (sctp_ifnp->vrf) {
248 sctp_free_vrf(sctp_ifnp->vrf);
249 }
250 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
251 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
252 }
253 }
254
255 void
sctp_update_ifn_mtu(uint32_t ifn_index,uint32_t mtu)256 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
257 {
258 struct sctp_ifn *sctp_ifnp;
259
260 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
261 if (sctp_ifnp != NULL) {
262 sctp_ifnp->ifn_mtu = mtu;
263 }
264 }
265
266 void
sctp_free_ifa(struct sctp_ifa * sctp_ifap)267 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
268 {
269 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
270 /* We zero'd the count */
271 if (sctp_ifap->ifn_p) {
272 sctp_free_ifn(sctp_ifap->ifn_p);
273 }
274 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
275 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
276 }
277 }
278
279 static void
sctp_delete_ifn(struct sctp_ifn * sctp_ifnp,int hold_addr_lock)280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
281 {
282 struct sctp_ifn *found;
283
284 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
285 if (found == NULL) {
286 /* Not in the list.. sorry */
287 return;
288 }
289 if (hold_addr_lock == 0) {
290 SCTP_IPI_ADDR_WLOCK();
291 } else {
292 SCTP_IPI_ADDR_WLOCK_ASSERT();
293 }
294 LIST_REMOVE(sctp_ifnp, next_bucket);
295 LIST_REMOVE(sctp_ifnp, next_ifn);
296 if (hold_addr_lock == 0) {
297 SCTP_IPI_ADDR_WUNLOCK();
298 }
299 /* Take away the reference, and possibly free it */
300 sctp_free_ifn(sctp_ifnp);
301 }
302
303 void
sctp_mark_ifa_addr_down(uint32_t vrf_id,struct sockaddr * addr,const char * if_name,uint32_t ifn_index)304 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
305 const char *if_name, uint32_t ifn_index)
306 {
307 struct sctp_vrf *vrf;
308 struct sctp_ifa *sctp_ifap;
309
310 SCTP_IPI_ADDR_RLOCK();
311 vrf = sctp_find_vrf(vrf_id);
312 if (vrf == NULL) {
313 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
314 goto out;
315 }
316 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
317 if (sctp_ifap == NULL) {
318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
319 goto out;
320 }
321 if (sctp_ifap->ifn_p == NULL) {
322 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
323 goto out;
324 }
325 if (if_name) {
326 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
327 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
328 sctp_ifap->ifn_p->ifn_name, if_name);
329 goto out;
330 }
331 } else {
332 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
334 sctp_ifap->ifn_p->ifn_index, ifn_index);
335 goto out;
336 }
337 }
338
339 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
340 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
341 out:
342 SCTP_IPI_ADDR_RUNLOCK();
343 }
344
345 void
sctp_mark_ifa_addr_up(uint32_t vrf_id,struct sockaddr * addr,const char * if_name,uint32_t ifn_index)346 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
347 const char *if_name, uint32_t ifn_index)
348 {
349 struct sctp_vrf *vrf;
350 struct sctp_ifa *sctp_ifap;
351
352 SCTP_IPI_ADDR_RLOCK();
353 vrf = sctp_find_vrf(vrf_id);
354 if (vrf == NULL) {
355 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
356 goto out;
357 }
358 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
359 if (sctp_ifap == NULL) {
360 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
361 goto out;
362 }
363 if (sctp_ifap->ifn_p == NULL) {
364 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
365 goto out;
366 }
367 if (if_name) {
368 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
369 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
370 sctp_ifap->ifn_p->ifn_name, if_name);
371 goto out;
372 }
373 } else {
374 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
376 sctp_ifap->ifn_p->ifn_index, ifn_index);
377 goto out;
378 }
379 }
380
381 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
382 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
383 out:
384 SCTP_IPI_ADDR_RUNLOCK();
385 }
386
387 /*-
388 * Add an ifa to an ifn.
389 * Register the interface as necessary.
390 * NOTE: ADDR write lock MUST be held.
391 */
392 static void
sctp_add_ifa_to_ifn(struct sctp_ifn * sctp_ifnp,struct sctp_ifa * sctp_ifap)393 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
394 {
395 int ifa_af;
396
397 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
398 sctp_ifap->ifn_p = sctp_ifnp;
399 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
400 /* update address counts */
401 sctp_ifnp->ifa_count++;
402 ifa_af = sctp_ifap->address.sa.sa_family;
403 switch (ifa_af) {
404 #ifdef INET
405 case AF_INET:
406 sctp_ifnp->num_v4++;
407 break;
408 #endif
409 #ifdef INET6
410 case AF_INET6:
411 sctp_ifnp->num_v6++;
412 break;
413 #endif
414 default:
415 break;
416 }
417 if (sctp_ifnp->ifa_count == 1) {
418 /* register the new interface */
419 sctp_ifnp->registered_af = ifa_af;
420 }
421 }
422
423 /*-
424 * Remove an ifa from its ifn.
425 * If no more addresses exist, remove the ifn too. Otherwise, re-register
426 * the interface based on the remaining address families left.
427 * NOTE: ADDR write lock MUST be held.
428 */
429 static void
sctp_remove_ifa_from_ifn(struct sctp_ifa * sctp_ifap)430 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
431 {
432 LIST_REMOVE(sctp_ifap, next_ifa);
433 if (sctp_ifap->ifn_p) {
434 /* update address counts */
435 sctp_ifap->ifn_p->ifa_count--;
436 switch (sctp_ifap->address.sa.sa_family) {
437 #ifdef INET
438 case AF_INET:
439 sctp_ifap->ifn_p->num_v4--;
440 break;
441 #endif
442 #ifdef INET6
443 case AF_INET6:
444 sctp_ifap->ifn_p->num_v6--;
445 break;
446 #endif
447 default:
448 break;
449 }
450
451 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
452 /* remove the ifn, possibly freeing it */
453 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
454 } else {
455 /* re-register address family type, if needed */
456 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
457 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
458 sctp_ifap->ifn_p->registered_af = AF_INET;
459 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
460 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
461 sctp_ifap->ifn_p->registered_af = AF_INET6;
462 }
463 /* free the ifn refcount */
464 sctp_free_ifn(sctp_ifap->ifn_p);
465 }
466 sctp_ifap->ifn_p = NULL;
467 }
468 }
469
470 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)471 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
472 uint32_t ifn_type, const char *if_name, void *ifa,
473 struct sockaddr *addr, uint32_t ifa_flags,
474 int dynamic_add)
475 {
476 struct sctp_vrf *vrf;
477 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
478 struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
479 struct sctp_ifalist *hash_addr_head;
480 struct sctp_ifnlist *hash_ifn_head;
481 uint32_t hash_of_addr;
482 int new_ifn_af = 0;
483
484 #ifdef SCTP_DEBUG
485 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
486 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
487 #endif
488 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
489 sizeof(struct sctp_ifn), SCTP_M_IFN);
490 if (new_sctp_ifnp == NULL) {
491 #ifdef INVARIANTS
492 panic("No memory for IFN");
493 #endif
494 return (NULL);
495 }
496 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
497 if (new_sctp_ifap == NULL) {
498 #ifdef INVARIANTS
499 panic("No memory for IFA");
500 #endif
501 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
502 return (NULL);
503 }
504
505 SCTP_IPI_ADDR_WLOCK();
506 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
507 if (sctp_ifnp) {
508 vrf = sctp_ifnp->vrf;
509 } else {
510 vrf = sctp_find_vrf(vrf_id);
511 if (vrf == NULL) {
512 vrf = sctp_allocate_vrf(vrf_id);
513 if (vrf == NULL) {
514 SCTP_IPI_ADDR_WUNLOCK();
515 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
516 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
517 return (NULL);
518 }
519 }
520 }
521 if (sctp_ifnp == NULL) {
522 /*
523 * build one and add it, can't hold lock until after malloc
524 * done though.
525 */
526 sctp_ifnp = new_sctp_ifnp;
527 new_sctp_ifnp = NULL;
528 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
529 sctp_ifnp->ifn_index = ifn_index;
530 sctp_ifnp->ifn_p = ifn;
531 sctp_ifnp->ifn_type = ifn_type;
532 sctp_ifnp->refcount = 0;
533 sctp_ifnp->vrf = vrf;
534 atomic_add_int(&vrf->refcount, 1);
535 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index);
536 if (if_name != NULL) {
537 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
538 } else {
539 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
540 }
541 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
542 LIST_INIT(&sctp_ifnp->ifalist);
543 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
544 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
545 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
546 new_ifn_af = 1;
547 }
548 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
549 if (sctp_ifap) {
550 /* Hmm, it already exists? */
551 if ((sctp_ifap->ifn_p) &&
552 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
553 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
554 sctp_ifap->ifn_p->ifn_name, ifn_index,
555 (void *)sctp_ifap);
556 if (new_ifn_af) {
557 /* Remove the created one that we don't want */
558 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
559 }
560 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
561 /* easy to solve, just switch back to active */
562 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
563 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
564 sctp_ifap->ifn_p = sctp_ifnp;
565 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
566 }
567 exit_stage_left:
568 SCTP_IPI_ADDR_WUNLOCK();
569 if (new_sctp_ifnp != NULL) {
570 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
571 }
572 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
573 return (sctp_ifap);
574 } else {
575 if (sctp_ifap->ifn_p) {
576 /*
577 * The last IFN gets the address, remove the
578 * old one
579 */
580 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
581 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
582 sctp_ifap->ifn_p->ifn_index, if_name,
583 ifn_index);
584 /* remove the address from the old ifn */
585 sctp_remove_ifa_from_ifn(sctp_ifap);
586 /* move the address over to the new ifn */
587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
588 goto exit_stage_left;
589 } else {
590 /* repair ifnp which was NULL ? */
591 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
592 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
593 (void *)sctp_ifnp, (void *)sctp_ifap);
594 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
595 }
596 goto exit_stage_left;
597 }
598 }
599 sctp_ifap = new_sctp_ifap;
600 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
601 sctp_ifap->ifn_p = sctp_ifnp;
602 atomic_add_int(&sctp_ifnp->refcount, 1);
603 sctp_ifap->vrf_id = vrf_id;
604 sctp_ifap->ifa = ifa;
605 memcpy(&sctp_ifap->address, addr, addr->sa_len);
606 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
607 sctp_ifap->flags = ifa_flags;
608 /* Set scope */
609 switch (sctp_ifap->address.sa.sa_family) {
610 #ifdef INET
611 case AF_INET:
612 {
613 struct sockaddr_in *sin;
614
615 sin = &sctp_ifap->address.sin;
616 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
617 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
618 sctp_ifap->src_is_loop = 1;
619 }
620 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
621 sctp_ifap->src_is_priv = 1;
622 }
623 sctp_ifnp->num_v4++;
624 if (new_ifn_af)
625 new_ifn_af = AF_INET;
626 break;
627 }
628 #endif
629 #ifdef INET6
630 case AF_INET6:
631 {
632 /* ok to use deprecated addresses? */
633 struct sockaddr_in6 *sin6;
634
635 sin6 = &sctp_ifap->address.sin6;
636 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
637 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
638 sctp_ifap->src_is_loop = 1;
639 }
640 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
641 sctp_ifap->src_is_priv = 1;
642 }
643 sctp_ifnp->num_v6++;
644 if (new_ifn_af)
645 new_ifn_af = AF_INET6;
646 break;
647 }
648 #endif
649 default:
650 new_ifn_af = 0;
651 break;
652 }
653 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
654
655 if ((sctp_ifap->src_is_priv == 0) &&
656 (sctp_ifap->src_is_loop == 0)) {
657 sctp_ifap->src_is_glob = 1;
658 }
659 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
660 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
661 sctp_ifap->refcount = 1;
662 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
663 sctp_ifnp->ifa_count++;
664 vrf->total_ifa_count++;
665 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
666 if (new_ifn_af) {
667 sctp_ifnp->registered_af = new_ifn_af;
668 }
669 SCTP_IPI_ADDR_WUNLOCK();
670 if (new_sctp_ifnp != NULL) {
671 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
672 }
673
674 if (dynamic_add) {
675 /*
676 * Bump up the refcount so that when the timer completes it
677 * will drop back down.
678 */
679 struct sctp_laddr *wi;
680
681 atomic_add_int(&sctp_ifap->refcount, 1);
682 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
683 if (wi == NULL) {
684 /*
685 * Gak, what can we do? We have lost an address
686 * change can you say HOSED?
687 */
688 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
689 /* Opps, must decrement the count */
690 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
691 if_name);
692 return (NULL);
693 }
694 SCTP_INCR_LADDR_COUNT();
695 memset(wi, 0, sizeof(*wi));
696 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
697 wi->ifa = sctp_ifap;
698 wi->action = SCTP_ADD_IP_ADDRESS;
699
700 SCTP_WQ_ADDR_LOCK();
701 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
702 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
703 (struct sctp_inpcb *)NULL,
704 (struct sctp_tcb *)NULL,
705 (struct sctp_nets *)NULL);
706 SCTP_WQ_ADDR_UNLOCK();
707 } else {
708 /* it's ready for use */
709 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
710 }
711 return (sctp_ifap);
712 }
713
714 void
sctp_del_addr_from_vrf(uint32_t vrf_id,struct sockaddr * addr,uint32_t ifn_index,const char * if_name)715 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
716 uint32_t ifn_index, const char *if_name)
717 {
718 struct sctp_vrf *vrf;
719 struct sctp_ifa *sctp_ifap = NULL;
720
721 SCTP_IPI_ADDR_WLOCK();
722 vrf = sctp_find_vrf(vrf_id);
723 if (vrf == NULL) {
724 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
725 goto out_now;
726 }
727
728 #ifdef SCTP_DEBUG
729 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
730 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
731 #endif
732 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
733 if (sctp_ifap) {
734 /* Validate the delete */
735 if (sctp_ifap->ifn_p) {
736 int valid = 0;
737
738 /*-
739 * The name has priority over the ifn_index
740 * if its given.
741 */
742 if (if_name) {
743 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
744 /* They match its a correct delete */
745 valid = 1;
746 }
747 }
748 if (!valid) {
749 /* last ditch check ifn_index */
750 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
751 valid = 1;
752 }
753 }
754 if (!valid) {
755 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
756 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
757 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
758 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
759 SCTP_IPI_ADDR_WUNLOCK();
760 return;
761 }
762 }
763 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
764 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
765 /*
766 * We don't set the flag. This means that the structure will
767 * hang around in EP's that have bound specific to it until
768 * they close. This gives us TCP like behavior if someone
769 * removes an address (or for that matter adds it right
770 * back).
771 */
772 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
773 vrf->total_ifa_count--;
774 LIST_REMOVE(sctp_ifap, next_bucket);
775 sctp_remove_ifa_from_ifn(sctp_ifap);
776 }
777 #ifdef SCTP_DEBUG
778 else {
779 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
780 ifn_index);
781 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
782 }
783 #endif
784
785 out_now:
786 SCTP_IPI_ADDR_WUNLOCK();
787 if (sctp_ifap) {
788 struct sctp_laddr *wi;
789
790 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
791 if (wi == NULL) {
792 /*
793 * Gak, what can we do? We have lost an address
794 * change can you say HOSED?
795 */
796 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
797
798 /* Oops, must decrement the count */
799 sctp_free_ifa(sctp_ifap);
800 return;
801 }
802 SCTP_INCR_LADDR_COUNT();
803 memset(wi, 0, sizeof(*wi));
804 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
805 wi->ifa = sctp_ifap;
806 wi->action = SCTP_DEL_IP_ADDRESS;
807 SCTP_WQ_ADDR_LOCK();
808 /*
809 * Should this really be a tailq? As it is we will process
810 * the newest first :-0
811 */
812 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
813 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
814 (struct sctp_inpcb *)NULL,
815 (struct sctp_tcb *)NULL,
816 (struct sctp_nets *)NULL);
817 SCTP_WQ_ADDR_UNLOCK();
818 }
819 return;
820 }
821
822 static int
sctp_does_stcb_own_this_addr(struct sctp_tcb * stcb,struct sockaddr * to)823 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
824 {
825 int loopback_scope;
826 #if defined(INET)
827 int ipv4_local_scope, ipv4_addr_legal;
828 #endif
829 #if defined(INET6)
830 int local_scope, site_scope, ipv6_addr_legal;
831 #endif
832 struct sctp_vrf *vrf;
833 struct sctp_ifn *sctp_ifn;
834 struct sctp_ifa *sctp_ifa;
835
836 loopback_scope = stcb->asoc.scope.loopback_scope;
837 #if defined(INET)
838 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
839 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
840 #endif
841 #if defined(INET6)
842 local_scope = stcb->asoc.scope.local_scope;
843 site_scope = stcb->asoc.scope.site_scope;
844 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
845 #endif
846
847 SCTP_IPI_ADDR_RLOCK();
848 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
849 if (vrf == NULL) {
850 /* no vrf, no addresses */
851 SCTP_IPI_ADDR_RUNLOCK();
852 return (0);
853 }
854
855 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
856 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
857 if ((loopback_scope == 0) &&
858 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
859 continue;
860 }
861 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
862 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
863 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
864 /*
865 * We allow pending addresses, where
866 * we have sent an asconf-add to be
867 * considered valid.
868 */
869 continue;
870 }
871 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
872 continue;
873 }
874 switch (sctp_ifa->address.sa.sa_family) {
875 #ifdef INET
876 case AF_INET:
877 if (ipv4_addr_legal) {
878 struct sockaddr_in *sin,
879 *rsin;
880
881 sin = &sctp_ifa->address.sin;
882 rsin = (struct sockaddr_in *)to;
883 if ((ipv4_local_scope == 0) &&
884 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
885 continue;
886 }
887 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
888 &sin->sin_addr) != 0) {
889 continue;
890 }
891 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
892 SCTP_IPI_ADDR_RUNLOCK();
893 return (1);
894 }
895 }
896 break;
897 #endif
898 #ifdef INET6
899 case AF_INET6:
900 if (ipv6_addr_legal) {
901 struct sockaddr_in6 *sin6,
902 *rsin6;
903
904 sin6 = &sctp_ifa->address.sin6;
905 rsin6 = (struct sockaddr_in6 *)to;
906 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
907 &sin6->sin6_addr) != 0) {
908 continue;
909 }
910 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
911 if (local_scope == 0)
912 continue;
913 if (sin6->sin6_scope_id == 0) {
914 if (sa6_recoverscope(sin6) != 0)
915 continue;
916 }
917 }
918 if ((site_scope == 0) &&
919 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
920 continue;
921 }
922 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
923 SCTP_IPI_ADDR_RUNLOCK();
924 return (1);
925 }
926 }
927 break;
928 #endif
929 default:
930 /* TSNH */
931 break;
932 }
933 }
934 }
935 } else {
936 struct sctp_laddr *laddr;
937
938 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
939 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
940 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
941 continue;
942 }
943 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
944 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
945 /*
946 * We allow pending addresses, where we have
947 * sent an asconf-add to be considered
948 * valid.
949 */
950 continue;
951 }
952 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
953 continue;
954 }
955 switch (to->sa_family) {
956 #ifdef INET
957 case AF_INET:
958 {
959 struct sockaddr_in *sin, *rsin;
960
961 sin = &laddr->ifa->address.sin;
962 rsin = (struct sockaddr_in *)to;
963 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
964 SCTP_IPI_ADDR_RUNLOCK();
965 return (1);
966 }
967 break;
968 }
969 #endif
970 #ifdef INET6
971 case AF_INET6:
972 {
973 struct sockaddr_in6 *sin6, *rsin6;
974
975 sin6 = &laddr->ifa->address.sin6;
976 rsin6 = (struct sockaddr_in6 *)to;
977 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
978 SCTP_IPI_ADDR_RUNLOCK();
979 return (1);
980 }
981 break;
982 }
983
984 #endif
985 default:
986 /* TSNH */
987 break;
988 }
989 }
990 }
991 SCTP_IPI_ADDR_RUNLOCK();
992 return (0);
993 }
994
995 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)996 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
997 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
998 {
999 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1000 /*
1001 * If we support the TCP model, then we must now dig through to see
1002 * if we can find our endpoint in the list of tcp ep's.
1003 */
1004 uint16_t lport, rport;
1005 struct sctppcbhead *ephead;
1006 struct sctp_inpcb *inp;
1007 struct sctp_laddr *laddr;
1008 struct sctp_tcb *stcb;
1009 struct sctp_nets *net;
1010
1011 if ((to == NULL) || (from == NULL)) {
1012 return (NULL);
1013 }
1014
1015 switch (to->sa_family) {
1016 #ifdef INET
1017 case AF_INET:
1018 if (from->sa_family == AF_INET) {
1019 lport = ((struct sockaddr_in *)to)->sin_port;
1020 rport = ((struct sockaddr_in *)from)->sin_port;
1021 } else {
1022 return (NULL);
1023 }
1024 break;
1025 #endif
1026 #ifdef INET6
1027 case AF_INET6:
1028 if (from->sa_family == AF_INET6) {
1029 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1030 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1031 } else {
1032 return (NULL);
1033 }
1034 break;
1035 #endif
1036 default:
1037 return (NULL);
1038 }
1039 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1040 /*
1041 * Ok now for each of the guys in this bucket we must look and see:
1042 * - Does the remote port match. - Does there single association's
1043 * addresses match this address (to). If so we update p_ep to point
1044 * to this ep and return the tcb from it.
1045 */
1046 LIST_FOREACH(inp, ephead, sctp_hash) {
1047 SCTP_INP_RLOCK(inp);
1048 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1049 SCTP_INP_RUNLOCK(inp);
1050 continue;
1051 }
1052 if (lport != inp->sctp_lport) {
1053 SCTP_INP_RUNLOCK(inp);
1054 continue;
1055 }
1056 switch (to->sa_family) {
1057 #ifdef INET
1058 case AF_INET:
1059 {
1060 struct sockaddr_in *sin;
1061
1062 sin = (struct sockaddr_in *)to;
1063 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1064 &sin->sin_addr) != 0) {
1065 SCTP_INP_RUNLOCK(inp);
1066 continue;
1067 }
1068 break;
1069 }
1070 #endif
1071 #ifdef INET6
1072 case AF_INET6:
1073 {
1074 struct sockaddr_in6 *sin6;
1075
1076 sin6 = (struct sockaddr_in6 *)to;
1077 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1078 &sin6->sin6_addr) != 0) {
1079 SCTP_INP_RUNLOCK(inp);
1080 continue;
1081 }
1082 break;
1083 }
1084 #endif
1085 default:
1086 SCTP_INP_RUNLOCK(inp);
1087 continue;
1088 }
1089 if (inp->def_vrf_id != vrf_id) {
1090 SCTP_INP_RUNLOCK(inp);
1091 continue;
1092 }
1093 /* check to see if the ep has one of the addresses */
1094 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1095 /* We are NOT bound all, so look further */
1096 int match = 0;
1097
1098 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1099 if (laddr->ifa == NULL) {
1100 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1101 continue;
1102 }
1103 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1104 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1105 continue;
1106 }
1107 if (laddr->ifa->address.sa.sa_family ==
1108 to->sa_family) {
1109 /* see if it matches */
1110 #ifdef INET
1111 if (from->sa_family == AF_INET) {
1112 struct sockaddr_in *intf_addr,
1113 *sin;
1114
1115 intf_addr = &laddr->ifa->address.sin;
1116 sin = (struct sockaddr_in *)to;
1117 if (sin->sin_addr.s_addr ==
1118 intf_addr->sin_addr.s_addr) {
1119 match = 1;
1120 break;
1121 }
1122 }
1123 #endif
1124 #ifdef INET6
1125 if (from->sa_family == AF_INET6) {
1126 struct sockaddr_in6 *intf_addr6;
1127 struct sockaddr_in6 *sin6;
1128
1129 sin6 = (struct sockaddr_in6 *)
1130 to;
1131 intf_addr6 = &laddr->ifa->address.sin6;
1132
1133 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1134 intf_addr6)) {
1135 match = 1;
1136 break;
1137 }
1138 }
1139 #endif
1140 }
1141 }
1142 if (match == 0) {
1143 /* This endpoint does not have this address */
1144 SCTP_INP_RUNLOCK(inp);
1145 continue;
1146 }
1147 }
1148 /*
1149 * Ok if we hit here the ep has the address, does it hold
1150 * the tcb?
1151 */
1152 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1153 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1154 if (stcb == NULL) {
1155 SCTP_INP_RUNLOCK(inp);
1156 continue;
1157 }
1158 SCTP_TCB_LOCK(stcb);
1159 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1160 SCTP_TCB_UNLOCK(stcb);
1161 SCTP_INP_RUNLOCK(inp);
1162 continue;
1163 }
1164 if (stcb->rport != rport) {
1165 /* remote port does not match. */
1166 SCTP_TCB_UNLOCK(stcb);
1167 SCTP_INP_RUNLOCK(inp);
1168 continue;
1169 }
1170 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1171 SCTP_TCB_UNLOCK(stcb);
1172 SCTP_INP_RUNLOCK(inp);
1173 continue;
1174 }
1175 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1176 SCTP_TCB_UNLOCK(stcb);
1177 SCTP_INP_RUNLOCK(inp);
1178 continue;
1179 }
1180 /* Does this TCB have a matching address? */
1181 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1182 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1183 /* not the same family, can't be a match */
1184 continue;
1185 }
1186 switch (from->sa_family) {
1187 #ifdef INET
1188 case AF_INET:
1189 {
1190 struct sockaddr_in *sin, *rsin;
1191
1192 sin = (struct sockaddr_in *)&net->ro._l_addr;
1193 rsin = (struct sockaddr_in *)from;
1194 if (sin->sin_addr.s_addr ==
1195 rsin->sin_addr.s_addr) {
1196 /* found it */
1197 if (netp != NULL) {
1198 *netp = net;
1199 }
1200 /*
1201 * Update the endpoint
1202 * pointer
1203 */
1204 *inp_p = inp;
1205 SCTP_INP_RUNLOCK(inp);
1206 return (stcb);
1207 }
1208 break;
1209 }
1210 #endif
1211 #ifdef INET6
1212 case AF_INET6:
1213 {
1214 struct sockaddr_in6 *sin6, *rsin6;
1215
1216 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1217 rsin6 = (struct sockaddr_in6 *)from;
1218 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1219 rsin6)) {
1220 /* found it */
1221 if (netp != NULL) {
1222 *netp = net;
1223 }
1224 /*
1225 * Update the endpoint
1226 * pointer
1227 */
1228 *inp_p = inp;
1229 SCTP_INP_RUNLOCK(inp);
1230 return (stcb);
1231 }
1232 break;
1233 }
1234 #endif
1235 default:
1236 /* TSNH */
1237 break;
1238 }
1239 }
1240 SCTP_TCB_UNLOCK(stcb);
1241 SCTP_INP_RUNLOCK(inp);
1242 }
1243 return (NULL);
1244 }
1245
1246 /*
1247 * rules for use
1248 *
1249 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1250 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1251 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1252 * NULL.
1253 */
1254
1255 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)1256 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1257 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1258 {
1259 struct sctpasochead *head;
1260 struct sctp_inpcb *inp;
1261 struct sctp_tcb *stcb = NULL;
1262 struct sctp_nets *net;
1263 uint16_t rport;
1264
1265 inp = *inp_p;
1266 switch (remote->sa_family) {
1267 #ifdef INET
1268 case AF_INET:
1269 rport = (((struct sockaddr_in *)remote)->sin_port);
1270 break;
1271 #endif
1272 #ifdef INET6
1273 case AF_INET6:
1274 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1275 break;
1276 #endif
1277 default:
1278 return (NULL);
1279 }
1280 if (locked_tcb) {
1281 /*
1282 * UN-lock so we can do proper locking here this occurs when
1283 * called from load_addresses_from_init.
1284 */
1285 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1286 SCTP_TCB_UNLOCK(locked_tcb);
1287 }
1288 SCTP_INP_INFO_RLOCK();
1289 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1290 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1291 /*-
1292 * Now either this guy is our listener or it's the
1293 * connector. If it is the one that issued the connect, then
1294 * it's only chance is to be the first TCB in the list. If
1295 * it is the acceptor, then do the special_lookup to hash
1296 * and find the real inp.
1297 */
1298 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1299 /* to is peer addr, from is my addr */
1300 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1301 netp, inp->def_vrf_id);
1302 if ((stcb != NULL) && (locked_tcb == NULL)) {
1303 /* we have a locked tcb, lower refcount */
1304 SCTP_INP_DECR_REF(inp);
1305 }
1306 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1307 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1308 SCTP_TCB_LOCK(locked_tcb);
1309 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1310 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1311 }
1312 SCTP_INP_INFO_RUNLOCK();
1313 return (stcb);
1314 } else {
1315 SCTP_INP_WLOCK(inp);
1316 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1317 goto null_return;
1318 }
1319 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1320 if (stcb == NULL) {
1321 goto null_return;
1322 }
1323 SCTP_TCB_LOCK(stcb);
1324
1325 if (stcb->rport != rport) {
1326 /* remote port does not match. */
1327 SCTP_TCB_UNLOCK(stcb);
1328 goto null_return;
1329 }
1330 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1331 SCTP_TCB_UNLOCK(stcb);
1332 goto null_return;
1333 }
1334 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1335 SCTP_TCB_UNLOCK(stcb);
1336 goto null_return;
1337 }
1338 /* now look at the list of remote addresses */
1339 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1340 #ifdef INVARIANTS
1341 if (net == (TAILQ_NEXT(net, sctp_next))) {
1342 panic("Corrupt net list");
1343 }
1344 #endif
1345 if (net->ro._l_addr.sa.sa_family !=
1346 remote->sa_family) {
1347 /* not the same family */
1348 continue;
1349 }
1350 switch (remote->sa_family) {
1351 #ifdef INET
1352 case AF_INET:
1353 {
1354 struct sockaddr_in *sin,
1355 *rsin;
1356
1357 sin = (struct sockaddr_in *)
1358 &net->ro._l_addr;
1359 rsin = (struct sockaddr_in *)remote;
1360 if (sin->sin_addr.s_addr ==
1361 rsin->sin_addr.s_addr) {
1362 /* found it */
1363 if (netp != NULL) {
1364 *netp = net;
1365 }
1366 if (locked_tcb == NULL) {
1367 SCTP_INP_DECR_REF(inp);
1368 } else if (locked_tcb != stcb) {
1369 SCTP_TCB_LOCK(locked_tcb);
1370 }
1371 if (locked_tcb) {
1372 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1373 }
1374
1375 SCTP_INP_WUNLOCK(inp);
1376 SCTP_INP_INFO_RUNLOCK();
1377 return (stcb);
1378 }
1379 break;
1380 }
1381 #endif
1382 #ifdef INET6
1383 case AF_INET6:
1384 {
1385 struct sockaddr_in6 *sin6,
1386 *rsin6;
1387
1388 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1389 rsin6 = (struct sockaddr_in6 *)remote;
1390 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1391 rsin6)) {
1392 /* found it */
1393 if (netp != NULL) {
1394 *netp = net;
1395 }
1396 if (locked_tcb == NULL) {
1397 SCTP_INP_DECR_REF(inp);
1398 } else if (locked_tcb != stcb) {
1399 SCTP_TCB_LOCK(locked_tcb);
1400 }
1401 if (locked_tcb) {
1402 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1403 }
1404 SCTP_INP_WUNLOCK(inp);
1405 SCTP_INP_INFO_RUNLOCK();
1406 return (stcb);
1407 }
1408 break;
1409 }
1410 #endif
1411 default:
1412 /* TSNH */
1413 break;
1414 }
1415 }
1416 SCTP_TCB_UNLOCK(stcb);
1417 }
1418 } else {
1419 SCTP_INP_WLOCK(inp);
1420 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1421 goto null_return;
1422 }
1423 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1424 inp->sctp_hashmark)];
1425 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1426 if (stcb->rport != rport) {
1427 /* remote port does not match */
1428 continue;
1429 }
1430 SCTP_TCB_LOCK(stcb);
1431 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1432 SCTP_TCB_UNLOCK(stcb);
1433 continue;
1434 }
1435 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1436 SCTP_TCB_UNLOCK(stcb);
1437 continue;
1438 }
1439 /* now look at the list of remote addresses */
1440 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1441 #ifdef INVARIANTS
1442 if (net == (TAILQ_NEXT(net, sctp_next))) {
1443 panic("Corrupt net list");
1444 }
1445 #endif
1446 if (net->ro._l_addr.sa.sa_family !=
1447 remote->sa_family) {
1448 /* not the same family */
1449 continue;
1450 }
1451 switch (remote->sa_family) {
1452 #ifdef INET
1453 case AF_INET:
1454 {
1455 struct sockaddr_in *sin,
1456 *rsin;
1457
1458 sin = (struct sockaddr_in *)
1459 &net->ro._l_addr;
1460 rsin = (struct sockaddr_in *)remote;
1461 if (sin->sin_addr.s_addr ==
1462 rsin->sin_addr.s_addr) {
1463 /* found it */
1464 if (netp != NULL) {
1465 *netp = net;
1466 }
1467 if (locked_tcb == NULL) {
1468 SCTP_INP_DECR_REF(inp);
1469 } else if (locked_tcb != stcb) {
1470 SCTP_TCB_LOCK(locked_tcb);
1471 }
1472 if (locked_tcb) {
1473 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1474 }
1475 SCTP_INP_WUNLOCK(inp);
1476 SCTP_INP_INFO_RUNLOCK();
1477 return (stcb);
1478 }
1479 break;
1480 }
1481 #endif
1482 #ifdef INET6
1483 case AF_INET6:
1484 {
1485 struct sockaddr_in6 *sin6,
1486 *rsin6;
1487
1488 sin6 = (struct sockaddr_in6 *)
1489 &net->ro._l_addr;
1490 rsin6 = (struct sockaddr_in6 *)remote;
1491 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1492 rsin6)) {
1493 /* found it */
1494 if (netp != NULL) {
1495 *netp = net;
1496 }
1497 if (locked_tcb == NULL) {
1498 SCTP_INP_DECR_REF(inp);
1499 } else if (locked_tcb != stcb) {
1500 SCTP_TCB_LOCK(locked_tcb);
1501 }
1502 if (locked_tcb) {
1503 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1504 }
1505 SCTP_INP_WUNLOCK(inp);
1506 SCTP_INP_INFO_RUNLOCK();
1507 return (stcb);
1508 }
1509 break;
1510 }
1511 #endif
1512 default:
1513 /* TSNH */
1514 break;
1515 }
1516 }
1517 SCTP_TCB_UNLOCK(stcb);
1518 }
1519 }
1520 null_return:
1521 /* clean up for returning null */
1522 if (locked_tcb) {
1523 SCTP_TCB_LOCK(locked_tcb);
1524 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1525 }
1526 SCTP_INP_WUNLOCK(inp);
1527 SCTP_INP_INFO_RUNLOCK();
1528 /* not found */
1529 return (NULL);
1530 }
1531
1532 /*
1533 * Find an association for a specific endpoint using the association id given
1534 * out in the COMM_UP notification
1535 */
1536 struct sctp_tcb *
sctp_findasoc_ep_asocid_locked(struct sctp_inpcb * inp,sctp_assoc_t asoc_id,int want_lock)1537 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1538 {
1539 /*
1540 * Use my the assoc_id to find a endpoint
1541 */
1542 struct sctpasochead *head;
1543 struct sctp_tcb *stcb;
1544 uint32_t id;
1545
1546 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1547 SCTP_PRINTF("TSNH ep_associd0\n");
1548 return (NULL);
1549 }
1550 id = (uint32_t)asoc_id;
1551 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1552 if (head == NULL) {
1553 /* invalid id TSNH */
1554 SCTP_PRINTF("TSNH ep_associd1\n");
1555 return (NULL);
1556 }
1557 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1558 if (stcb->asoc.assoc_id == id) {
1559 if (inp != stcb->sctp_ep) {
1560 /*
1561 * some other guy has the same id active (id
1562 * collision ??).
1563 */
1564 SCTP_PRINTF("TSNH ep_associd2\n");
1565 continue;
1566 }
1567 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1568 continue;
1569 }
1570 if (want_lock) {
1571 SCTP_TCB_LOCK(stcb);
1572 }
1573 return (stcb);
1574 }
1575 }
1576 return (NULL);
1577 }
1578
1579 struct sctp_tcb *
sctp_findassociation_ep_asocid(struct sctp_inpcb * inp,sctp_assoc_t asoc_id,int want_lock)1580 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1581 {
1582 struct sctp_tcb *stcb;
1583
1584 SCTP_INP_RLOCK(inp);
1585 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1586 SCTP_INP_RUNLOCK(inp);
1587 return (stcb);
1588 }
1589
1590 /*
1591 * Endpoint probe expects that the INP_INFO is locked.
1592 */
1593 static struct sctp_inpcb *
sctp_endpoint_probe(struct sockaddr * nam,struct sctppcbhead * head,uint16_t lport,uint32_t vrf_id)1594 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1595 uint16_t lport, uint32_t vrf_id)
1596 {
1597 struct sctp_inpcb *inp;
1598 struct sctp_laddr *laddr;
1599 #ifdef INET
1600 struct sockaddr_in *sin;
1601 #endif
1602 #ifdef INET6
1603 struct sockaddr_in6 *sin6;
1604 struct sockaddr_in6 *intf_addr6;
1605 #endif
1606 int fnd;
1607
1608 #ifdef INET
1609 sin = NULL;
1610 #endif
1611 #ifdef INET6
1612 sin6 = NULL;
1613 #endif
1614 switch (nam->sa_family) {
1615 #ifdef INET
1616 case AF_INET:
1617 sin = (struct sockaddr_in *)nam;
1618 break;
1619 #endif
1620 #ifdef INET6
1621 case AF_INET6:
1622 sin6 = (struct sockaddr_in6 *)nam;
1623 break;
1624 #endif
1625 default:
1626 /* unsupported family */
1627 return (NULL);
1628 }
1629
1630 if (head == NULL)
1631 return (NULL);
1632
1633 LIST_FOREACH(inp, head, sctp_hash) {
1634 SCTP_INP_RLOCK(inp);
1635 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1636 SCTP_INP_RUNLOCK(inp);
1637 continue;
1638 }
1639 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1640 (inp->sctp_lport == lport)) {
1641 /* got it */
1642 switch (nam->sa_family) {
1643 #ifdef INET
1644 case AF_INET:
1645 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1646 SCTP_IPV6_V6ONLY(inp)) {
1647 /*
1648 * IPv4 on a IPv6 socket with ONLY
1649 * IPv6 set
1650 */
1651 SCTP_INP_RUNLOCK(inp);
1652 continue;
1653 }
1654 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1655 &sin->sin_addr) != 0) {
1656 SCTP_INP_RUNLOCK(inp);
1657 continue;
1658 }
1659 break;
1660 #endif
1661 #ifdef INET6
1662 case AF_INET6:
1663 /*
1664 * A V6 address and the endpoint is NOT
1665 * bound V6
1666 */
1667 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1668 SCTP_INP_RUNLOCK(inp);
1669 continue;
1670 }
1671 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1672 &sin6->sin6_addr) != 0) {
1673 SCTP_INP_RUNLOCK(inp);
1674 continue;
1675 }
1676 break;
1677 #endif
1678 default:
1679 break;
1680 }
1681 /* does a VRF id match? */
1682 fnd = 0;
1683 if (inp->def_vrf_id == vrf_id)
1684 fnd = 1;
1685
1686 SCTP_INP_RUNLOCK(inp);
1687 if (!fnd)
1688 continue;
1689 return (inp);
1690 }
1691 SCTP_INP_RUNLOCK(inp);
1692 }
1693 switch (nam->sa_family) {
1694 #ifdef INET
1695 case AF_INET:
1696 if (sin->sin_addr.s_addr == INADDR_ANY) {
1697 /* Can't hunt for one that has no address specified */
1698 return (NULL);
1699 }
1700 break;
1701 #endif
1702 #ifdef INET6
1703 case AF_INET6:
1704 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1705 /* Can't hunt for one that has no address specified */
1706 return (NULL);
1707 }
1708 break;
1709 #endif
1710 default:
1711 break;
1712 }
1713 /*
1714 * ok, not bound to all so see if we can find a EP bound to this
1715 * address.
1716 */
1717 LIST_FOREACH(inp, head, sctp_hash) {
1718 SCTP_INP_RLOCK(inp);
1719 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1720 SCTP_INP_RUNLOCK(inp);
1721 continue;
1722 }
1723 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1724 SCTP_INP_RUNLOCK(inp);
1725 continue;
1726 }
1727 /*
1728 * Ok this could be a likely candidate, look at all of its
1729 * addresses
1730 */
1731 if (inp->sctp_lport != lport) {
1732 SCTP_INP_RUNLOCK(inp);
1733 continue;
1734 }
1735 /* does a VRF id match? */
1736 fnd = 0;
1737 if (inp->def_vrf_id == vrf_id)
1738 fnd = 1;
1739
1740 if (!fnd) {
1741 SCTP_INP_RUNLOCK(inp);
1742 continue;
1743 }
1744 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1745 if (laddr->ifa == NULL) {
1746 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1747 __func__);
1748 continue;
1749 }
1750 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1751 (void *)laddr->ifa);
1752 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1753 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1754 continue;
1755 }
1756 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1757 /* possible, see if it matches */
1758 switch (nam->sa_family) {
1759 #ifdef INET
1760 case AF_INET:
1761 if (sin->sin_addr.s_addr ==
1762 laddr->ifa->address.sin.sin_addr.s_addr) {
1763 SCTP_INP_RUNLOCK(inp);
1764 return (inp);
1765 }
1766 break;
1767 #endif
1768 #ifdef INET6
1769 case AF_INET6:
1770 intf_addr6 = &laddr->ifa->address.sin6;
1771 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1772 intf_addr6)) {
1773 SCTP_INP_RUNLOCK(inp);
1774 return (inp);
1775 }
1776 break;
1777 #endif
1778 }
1779 }
1780 }
1781 SCTP_INP_RUNLOCK(inp);
1782 }
1783 return (NULL);
1784 }
1785
1786 static struct sctp_inpcb *
sctp_isport_inuse(struct sctp_inpcb * inp,uint16_t lport,uint32_t vrf_id)1787 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1788 {
1789 struct sctppcbhead *head;
1790 struct sctp_inpcb *t_inp;
1791 int fnd;
1792
1793 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1794 SCTP_BASE_INFO(hashmark))];
1795 LIST_FOREACH(t_inp, head, sctp_hash) {
1796 if (t_inp->sctp_lport != lport) {
1797 continue;
1798 }
1799 /* is it in the VRF in question */
1800 fnd = 0;
1801 if (t_inp->def_vrf_id == vrf_id)
1802 fnd = 1;
1803 if (!fnd)
1804 continue;
1805
1806 /* This one is in use. */
1807 /* check the v6/v4 binding issue */
1808 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1809 SCTP_IPV6_V6ONLY(t_inp)) {
1810 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1811 /* collision in V6 space */
1812 return (t_inp);
1813 } else {
1814 /* inp is BOUND_V4 no conflict */
1815 continue;
1816 }
1817 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1818 /* t_inp is bound v4 and v6, conflict always */
1819 return (t_inp);
1820 } else {
1821 /* t_inp is bound only V4 */
1822 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1823 SCTP_IPV6_V6ONLY(inp)) {
1824 /* no conflict */
1825 continue;
1826 }
1827 /* else fall through to conflict */
1828 }
1829 return (t_inp);
1830 }
1831 return (NULL);
1832 }
1833
1834 int
sctp_swap_inpcb_for_listen(struct sctp_inpcb * inp)1835 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1836 {
1837 /* For 1-2-1 with port reuse */
1838 struct sctppcbhead *head;
1839 struct sctp_inpcb *tinp, *ninp;
1840
1841 SCTP_INP_INFO_WLOCK_ASSERT();
1842 SCTP_INP_WLOCK_ASSERT(inp);
1843
1844 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1845 /* only works with port reuse on */
1846 return (-1);
1847 }
1848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1849 return (0);
1850 }
1851 SCTP_INP_WUNLOCK(inp);
1852 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1853 SCTP_BASE_INFO(hashmark))];
1854 /* Kick out all non-listeners to the TCP hash */
1855 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1856 if (tinp->sctp_lport != inp->sctp_lport) {
1857 continue;
1858 }
1859 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1860 continue;
1861 }
1862 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1863 continue;
1864 }
1865 if (SCTP_IS_LISTENING(tinp)) {
1866 continue;
1867 }
1868 SCTP_INP_WLOCK(tinp);
1869 LIST_REMOVE(tinp, sctp_hash);
1870 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1871 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1872 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1873 SCTP_INP_WUNLOCK(tinp);
1874 }
1875 SCTP_INP_WLOCK(inp);
1876 /* Pull from where he was */
1877 LIST_REMOVE(inp, sctp_hash);
1878 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1879 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1880 LIST_INSERT_HEAD(head, inp, sctp_hash);
1881 return (0);
1882 }
1883
1884 struct sctp_inpcb *
sctp_pcb_findep(struct sockaddr * nam,int find_tcp_pool,int have_lock,uint32_t vrf_id)1885 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1886 uint32_t vrf_id)
1887 {
1888 /*
1889 * First we check the hash table to see if someone has this port
1890 * bound with just the port.
1891 */
1892 struct sctp_inpcb *inp;
1893 struct sctppcbhead *head;
1894 int lport;
1895 unsigned int i;
1896 #ifdef INET
1897 struct sockaddr_in *sin;
1898 #endif
1899 #ifdef INET6
1900 struct sockaddr_in6 *sin6;
1901 #endif
1902
1903 switch (nam->sa_family) {
1904 #ifdef INET
1905 case AF_INET:
1906 sin = (struct sockaddr_in *)nam;
1907 lport = sin->sin_port;
1908 break;
1909 #endif
1910 #ifdef INET6
1911 case AF_INET6:
1912 sin6 = (struct sockaddr_in6 *)nam;
1913 lport = sin6->sin6_port;
1914 break;
1915 #endif
1916 default:
1917 return (NULL);
1918 }
1919 /*
1920 * I could cheat here and just cast to one of the types but we will
1921 * do it right. It also provides the check against an Unsupported
1922 * type too.
1923 */
1924 /* Find the head of the ALLADDR chain */
1925 if (have_lock == 0) {
1926 SCTP_INP_INFO_RLOCK();
1927 }
1928 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1929 SCTP_BASE_INFO(hashmark))];
1930 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1931
1932 /*
1933 * If the TCP model exists it could be that the main listening
1934 * endpoint is gone but there still exists a connected socket for
1935 * this guy. If so we can return the first one that we find. This
1936 * may NOT be the correct one so the caller should be wary on the
1937 * returned INP. Currently the only caller that sets find_tcp_pool
1938 * is in bindx where we are verifying that a user CAN bind the
1939 * address. He either has bound it already, or someone else has, or
1940 * its open to bind, so this is good enough.
1941 */
1942 if (inp == NULL && find_tcp_pool) {
1943 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1944 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1945 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1946 if (inp) {
1947 break;
1948 }
1949 }
1950 }
1951 if (inp) {
1952 SCTP_INP_INCR_REF(inp);
1953 }
1954 if (have_lock == 0) {
1955 SCTP_INP_INFO_RUNLOCK();
1956 }
1957 return (inp);
1958 }
1959
1960 /*
1961 * Find an association for an endpoint with the pointer to whom you want to
1962 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1963 * need to change the *to to some other struct like a mbuf...
1964 */
1965 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)1966 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1967 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1968 uint32_t vrf_id)
1969 {
1970 struct sctp_inpcb *inp = NULL;
1971 struct sctp_tcb *stcb;
1972
1973 SCTP_INP_INFO_RLOCK();
1974 if (find_tcp_pool) {
1975 if (inp_p != NULL) {
1976 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1977 vrf_id);
1978 } else {
1979 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1980 vrf_id);
1981 }
1982 if (stcb != NULL) {
1983 SCTP_INP_INFO_RUNLOCK();
1984 return (stcb);
1985 }
1986 }
1987 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1988 if (inp_p != NULL) {
1989 *inp_p = inp;
1990 }
1991 SCTP_INP_INFO_RUNLOCK();
1992 if (inp == NULL) {
1993 return (NULL);
1994 }
1995 /*
1996 * ok, we have an endpoint, now lets find the assoc for it (if any)
1997 * we now place the source address or from in the to of the find
1998 * endpoint call. Since in reality this chain is used from the
1999 * inbound packet side.
2000 */
2001 if (inp_p != NULL) {
2002 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2003 NULL);
2004 } else {
2005 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2006 NULL);
2007 }
2008 return (stcb);
2009 }
2010
2011 /*
2012 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2013 * find all addresses that the sender has specified in any address list. Each
2014 * address will be used to lookup the TCB and see if one exits.
2015 */
2016 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)2017 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2018 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2019 struct sockaddr *dst)
2020 {
2021 struct sctp_paramhdr *phdr, param_buf;
2022 #if defined(INET) || defined(INET6)
2023 struct sctp_tcb *stcb;
2024 uint16_t ptype;
2025 #endif
2026 uint16_t plen;
2027 #ifdef INET
2028 struct sockaddr_in sin4;
2029 #endif
2030 #ifdef INET6
2031 struct sockaddr_in6 sin6;
2032 #endif
2033
2034 #ifdef INET
2035 memset(&sin4, 0, sizeof(sin4));
2036 sin4.sin_len = sizeof(sin4);
2037 sin4.sin_family = AF_INET;
2038 sin4.sin_port = sh->src_port;
2039 #endif
2040 #ifdef INET6
2041 memset(&sin6, 0, sizeof(sin6));
2042 sin6.sin6_len = sizeof(sin6);
2043 sin6.sin6_family = AF_INET6;
2044 sin6.sin6_port = sh->src_port;
2045 #endif
2046
2047 offset += sizeof(struct sctp_init_chunk);
2048
2049 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
2050 while (phdr != NULL) {
2051 /* now we must see if we want the parameter */
2052 #if defined(INET) || defined(INET6)
2053 ptype = ntohs(phdr->param_type);
2054 #endif
2055 plen = ntohs(phdr->param_length);
2056 if (plen == 0) {
2057 break;
2058 }
2059 #ifdef INET
2060 if (ptype == SCTP_IPV4_ADDRESS &&
2061 plen == sizeof(struct sctp_ipv4addr_param)) {
2062 /* Get the rest of the address */
2063 struct sctp_ipv4addr_param ip4_param, *p4;
2064
2065 phdr = sctp_get_next_param(m, offset,
2066 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2067 if (phdr == NULL) {
2068 return (NULL);
2069 }
2070 p4 = (struct sctp_ipv4addr_param *)phdr;
2071 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2072 /* look it up */
2073 stcb = sctp_findassociation_ep_addr(inp_p,
2074 (struct sockaddr *)&sin4, netp, dst, NULL);
2075 if (stcb != NULL) {
2076 return (stcb);
2077 }
2078 }
2079 #endif
2080 #ifdef INET6
2081 if (ptype == SCTP_IPV6_ADDRESS &&
2082 plen == sizeof(struct sctp_ipv6addr_param)) {
2083 /* Get the rest of the address */
2084 struct sctp_ipv6addr_param ip6_param, *p6;
2085
2086 phdr = sctp_get_next_param(m, offset,
2087 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2088 if (phdr == NULL) {
2089 return (NULL);
2090 }
2091 p6 = (struct sctp_ipv6addr_param *)phdr;
2092 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2093 /* look it up */
2094 stcb = sctp_findassociation_ep_addr(inp_p,
2095 (struct sockaddr *)&sin6, netp, dst, NULL);
2096 if (stcb != NULL) {
2097 return (stcb);
2098 }
2099 }
2100 #endif
2101 offset += SCTP_SIZE32(plen);
2102 phdr = sctp_get_next_param(m, offset, ¶m_buf,
2103 sizeof(param_buf));
2104 }
2105 return (NULL);
2106 }
2107
2108 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)2109 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2110 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2111 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2112 {
2113 /*
2114 * Use my vtag to hash. If we find it we then verify the source addr
2115 * is in the assoc. If all goes well we save a bit on rec of a
2116 * packet.
2117 */
2118 struct sctpasochead *head;
2119 struct sctp_nets *net;
2120 struct sctp_tcb *stcb;
2121
2122 SCTP_INP_INFO_RLOCK();
2123 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2124 SCTP_BASE_INFO(hashasocmark))];
2125 LIST_FOREACH(stcb, head, sctp_asocs) {
2126 SCTP_INP_RLOCK(stcb->sctp_ep);
2127 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2128 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2129 continue;
2130 }
2131 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2132 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2133 continue;
2134 }
2135 SCTP_TCB_LOCK(stcb);
2136 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2137 if (stcb->asoc.my_vtag == vtag) {
2138 /* candidate */
2139 if (stcb->rport != rport) {
2140 SCTP_TCB_UNLOCK(stcb);
2141 continue;
2142 }
2143 if (stcb->sctp_ep->sctp_lport != lport) {
2144 SCTP_TCB_UNLOCK(stcb);
2145 continue;
2146 }
2147 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2148 SCTP_TCB_UNLOCK(stcb);
2149 continue;
2150 }
2151 /* RRS:Need toaddr check here */
2152 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2153 /* Endpoint does not own this address */
2154 SCTP_TCB_UNLOCK(stcb);
2155 continue;
2156 }
2157 if (remote_tag) {
2158 /*
2159 * If we have both vtags that's all we match
2160 * on
2161 */
2162 if (stcb->asoc.peer_vtag == remote_tag) {
2163 /*
2164 * If both tags match we consider it
2165 * conclusive and check NO
2166 * source/destination addresses
2167 */
2168 goto conclusive;
2169 }
2170 }
2171 if (skip_src_check) {
2172 conclusive:
2173 if (from) {
2174 *netp = sctp_findnet(stcb, from);
2175 } else {
2176 *netp = NULL; /* unknown */
2177 }
2178 if (inp_p)
2179 *inp_p = stcb->sctp_ep;
2180 SCTP_INP_INFO_RUNLOCK();
2181 return (stcb);
2182 }
2183 net = sctp_findnet(stcb, from);
2184 if (net) {
2185 /* yep its him. */
2186 *netp = net;
2187 SCTP_STAT_INCR(sctps_vtagexpress);
2188 *inp_p = stcb->sctp_ep;
2189 SCTP_INP_INFO_RUNLOCK();
2190 return (stcb);
2191 } else {
2192 /*
2193 * not him, this should only happen in rare
2194 * cases so I peg it.
2195 */
2196 SCTP_STAT_INCR(sctps_vtagbogus);
2197 }
2198 }
2199 SCTP_TCB_UNLOCK(stcb);
2200 }
2201 SCTP_INP_INFO_RUNLOCK();
2202 return (NULL);
2203 }
2204
2205 /*
2206 * Find an association with the pointer to the inbound IP packet. This can be
2207 * a IPv4 or IPv6 packet.
2208 */
2209 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)2210 sctp_findassociation_addr(struct mbuf *m, int offset,
2211 struct sockaddr *src, struct sockaddr *dst,
2212 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2213 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2214 {
2215 struct sctp_tcb *stcb;
2216 struct sctp_inpcb *inp;
2217
2218 if (sh->v_tag) {
2219 /* we only go down this path if vtag is non-zero */
2220 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2221 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2222 if (stcb) {
2223 return (stcb);
2224 }
2225 }
2226
2227 if (inp_p) {
2228 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2229 1, vrf_id);
2230 inp = *inp_p;
2231 } else {
2232 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2233 1, vrf_id);
2234 }
2235 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2236 if (stcb == NULL && inp) {
2237 /* Found a EP but not this address */
2238 if ((ch->chunk_type == SCTP_INITIATION) ||
2239 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2240 /*-
2241 * special hook, we do NOT return linp or an
2242 * association that is linked to an existing
2243 * association that is under the TCP pool (i.e. no
2244 * listener exists). The endpoint finding routine
2245 * will always find a listener before examining the
2246 * TCP pool.
2247 */
2248 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2249 if (inp_p) {
2250 *inp_p = NULL;
2251 }
2252 return (NULL);
2253 }
2254 stcb = sctp_findassociation_special_addr(m,
2255 offset, sh, &inp, netp, dst);
2256 if (inp_p != NULL) {
2257 *inp_p = inp;
2258 }
2259 }
2260 }
2261 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2262 return (stcb);
2263 }
2264
2265 /*
2266 * lookup an association by an ASCONF lookup address.
2267 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2268 */
2269 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)2270 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2271 struct sockaddr *dst, struct sctphdr *sh,
2272 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2273 {
2274 struct sctp_tcb *stcb;
2275 union sctp_sockstore remote_store;
2276 struct sctp_paramhdr param_buf, *phdr;
2277 int ptype;
2278 int zero_address = 0;
2279 #ifdef INET
2280 struct sockaddr_in *sin;
2281 #endif
2282 #ifdef INET6
2283 struct sockaddr_in6 *sin6;
2284 #endif
2285
2286 memset(&remote_store, 0, sizeof(remote_store));
2287 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2288 ¶m_buf, sizeof(struct sctp_paramhdr));
2289 if (phdr == NULL) {
2290 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2291 __func__);
2292 return NULL;
2293 }
2294 ptype = (int)((uint32_t)ntohs(phdr->param_type));
2295 /* get the correlation address */
2296 switch (ptype) {
2297 #ifdef INET6
2298 case SCTP_IPV6_ADDRESS:
2299 {
2300 /* ipv6 address param */
2301 struct sctp_ipv6addr_param *p6, p6_buf;
2302
2303 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2304 return NULL;
2305 }
2306 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2307 offset + sizeof(struct sctp_asconf_chunk),
2308 &p6_buf.ph, sizeof(p6_buf));
2309 if (p6 == NULL) {
2310 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2311 __func__);
2312 return (NULL);
2313 }
2314 sin6 = &remote_store.sin6;
2315 sin6->sin6_family = AF_INET6;
2316 sin6->sin6_len = sizeof(*sin6);
2317 sin6->sin6_port = sh->src_port;
2318 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2319 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2320 zero_address = 1;
2321 break;
2322 }
2323 #endif
2324 #ifdef INET
2325 case SCTP_IPV4_ADDRESS:
2326 {
2327 /* ipv4 address param */
2328 struct sctp_ipv4addr_param *p4, p4_buf;
2329
2330 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2331 return NULL;
2332 }
2333 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2334 offset + sizeof(struct sctp_asconf_chunk),
2335 &p4_buf.ph, sizeof(p4_buf));
2336 if (p4 == NULL) {
2337 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2338 __func__);
2339 return (NULL);
2340 }
2341 sin = &remote_store.sin;
2342 sin->sin_family = AF_INET;
2343 sin->sin_len = sizeof(*sin);
2344 sin->sin_port = sh->src_port;
2345 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2346 if (sin->sin_addr.s_addr == INADDR_ANY)
2347 zero_address = 1;
2348 break;
2349 }
2350 #endif
2351 default:
2352 /* invalid address param type */
2353 return NULL;
2354 }
2355
2356 if (zero_address) {
2357 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2358 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2359 if (stcb != NULL) {
2360 SCTP_INP_DECR_REF(*inp_p);
2361 }
2362 } else {
2363 stcb = sctp_findassociation_ep_addr(inp_p,
2364 &remote_store.sa, netp,
2365 dst, NULL);
2366 }
2367 return (stcb);
2368 }
2369
2370 /*
2371 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2372 * addresses. This way if we don't get a bind we by default pick a ephemeral
2373 * port with all addresses bound.
2374 */
2375 int
sctp_inpcb_alloc(struct socket * so,uint32_t vrf_id)2376 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2377 {
2378 /*
2379 * we get called when a new endpoint starts up. We need to allocate
2380 * the sctp_inpcb structure from the zone and init it. Mark it as
2381 * unbound and find a port that we can use as an ephemeral with
2382 * INADDR_ANY. If the user binds later no problem we can then add in
2383 * the specific addresses. And setup the default parameters for the
2384 * EP.
2385 */
2386 int i, error;
2387 struct sctp_inpcb *inp;
2388 struct sctp_pcb *m;
2389 struct timeval time;
2390 sctp_sharedkey_t *null_key;
2391
2392 error = 0;
2393
2394 SCTP_INP_INFO_WLOCK();
2395 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2396 if (inp == NULL) {
2397 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2398 SCTP_INP_INFO_WUNLOCK();
2399 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2400 return (ENOBUFS);
2401 }
2402 /* zap it */
2403 memset(inp, 0, sizeof(*inp));
2404
2405 /* bump generations */
2406 /* setup socket pointers */
2407 inp->sctp_socket = so;
2408 inp->ip_inp.inp.inp_socket = so;
2409 inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2410 #ifdef INET6
2411 if (INP_SOCKAF(so) == AF_INET6) {
2412 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2413 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2414 }
2415 if (MODULE_GLOBAL(ip6_v6only)) {
2416 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2417 }
2418 }
2419 #endif
2420 inp->sctp_associd_counter = 1;
2421 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2422 inp->sctp_frag_point = 0;
2423 inp->max_cwnd = 0;
2424 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2425 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2426 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2427 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2428 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2429 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2430 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2431 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2432 inp->idata_supported = 0;
2433 inp->rcv_edmid = SCTP_EDMID_NONE;
2434
2435 inp->fibnum = so->so_fibnum;
2436 /* init the small hash table we use to track asocid <-> tcb */
2437 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2438 if (inp->sctp_asocidhash == NULL) {
2439 crfree(inp->ip_inp.inp.inp_cred);
2440 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2441 SCTP_INP_INFO_WUNLOCK();
2442 return (ENOBUFS);
2443 }
2444 SCTP_INCR_EP_COUNT();
2445 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2446 SCTP_INP_INFO_WUNLOCK();
2447
2448 so->so_pcb = (caddr_t)inp;
2449
2450 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2451 /* UDP style socket */
2452 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2453 SCTP_PCB_FLAGS_UNBOUND);
2454 /* Be sure it is NON-BLOCKING IO for UDP */
2455 /* SCTP_SET_SO_NBIO(so); */
2456 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2457 /* TCP style socket */
2458 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2459 SCTP_PCB_FLAGS_UNBOUND);
2460 /* Be sure we have blocking IO by default */
2461 SOCK_LOCK(so);
2462 SCTP_CLEAR_SO_NBIO(so);
2463 SOCK_UNLOCK(so);
2464 } else {
2465 /*
2466 * unsupported socket type (RAW, etc)- in case we missed it
2467 * in protosw
2468 */
2469 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2470 so->so_pcb = NULL;
2471 crfree(inp->ip_inp.inp.inp_cred);
2472 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2473 return (EOPNOTSUPP);
2474 }
2475 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2476 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2477 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2478 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2479 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2480 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2481 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2482 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2483 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2484 }
2485 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2486 &inp->sctp_hashmark);
2487 if (inp->sctp_tcbhash == NULL) {
2488 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2489 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2490 so->so_pcb = NULL;
2491 crfree(inp->ip_inp.inp.inp_cred);
2492 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2493 return (ENOBUFS);
2494 }
2495 inp->def_vrf_id = vrf_id;
2496
2497 SCTP_INP_INFO_WLOCK();
2498 SCTP_INP_LOCK_INIT(inp);
2499 rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp",
2500 RW_RECURSE | RW_DUPOK);
2501 SCTP_INP_READ_LOCK_INIT(inp);
2502 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2503 /* lock the new ep */
2504 SCTP_INP_WLOCK(inp);
2505
2506 /* add it to the info area */
2507 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2508 SCTP_INP_INFO_WUNLOCK();
2509
2510 TAILQ_INIT(&inp->read_queue);
2511 LIST_INIT(&inp->sctp_addr_list);
2512
2513 LIST_INIT(&inp->sctp_asoc_list);
2514
2515 #ifdef SCTP_TRACK_FREED_ASOCS
2516 /* TEMP CODE */
2517 LIST_INIT(&inp->sctp_asoc_free_list);
2518 #endif
2519 /* Init the timer structure for signature change */
2520 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2521 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2522
2523 /* now init the actual endpoint default data */
2524 m = &inp->sctp_ep;
2525
2526 /* setup the base timeout information */
2527 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */
2528 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */
2529 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2530 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2531 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2532 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2533 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2534 /* all max/min max are in ms */
2535 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2536 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2537 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2538 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2539 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2540 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2541 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2542 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2543 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2544 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2545 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2546 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2547 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2548
2549 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2550 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2551 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2552 /* number of streams to pre-open on a association */
2553 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2554
2555 m->default_mtu = 0;
2556 /* Add adaptation cookie */
2557 m->adaptation_layer_indicator = 0;
2558 m->adaptation_layer_indicator_provided = 0;
2559
2560 /* seed random number generator */
2561 m->random_counter = 1;
2562 m->store_at = SCTP_SIGNATURE_SIZE;
2563 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2564 sctp_fill_random_store(m);
2565
2566 /* Minimum cookie size */
2567 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2568 sizeof(struct sctp_state_cookie);
2569 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2570
2571 /* Setup the initial secret */
2572 (void)SCTP_GETTIME_TIMEVAL(&time);
2573 m->time_of_secret_change = time.tv_sec;
2574
2575 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2576 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2577 }
2578 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2579
2580 /* How long is a cookie good for ? */
2581 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2582 /*
2583 * Initialize authentication parameters
2584 */
2585 m->local_hmacs = sctp_default_supported_hmaclist();
2586 m->local_auth_chunks = sctp_alloc_chunklist();
2587 if (inp->asconf_supported) {
2588 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2589 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2590 }
2591 m->default_dscp = 0;
2592 #ifdef INET6
2593 m->default_flowlabel = 0;
2594 #endif
2595 m->port = 0; /* encapsulation disabled by default */
2596 LIST_INIT(&m->shared_keys);
2597 /* add default NULL key as key id 0 */
2598 null_key = sctp_alloc_sharedkey();
2599 sctp_insert_sharedkey(&m->shared_keys, null_key);
2600 SCTP_INP_WUNLOCK(inp);
2601 #ifdef SCTP_LOG_CLOSING
2602 sctp_log_closing(inp, NULL, 12);
2603 #endif
2604 return (error);
2605 }
2606
2607 void
sctp_move_pcb_and_assoc(struct sctp_inpcb * old_inp,struct sctp_inpcb * new_inp,struct sctp_tcb * stcb)2608 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2609 struct sctp_tcb *stcb)
2610 {
2611 struct sctp_nets *net;
2612 uint16_t lport, rport;
2613 struct sctppcbhead *head;
2614 struct sctp_laddr *laddr, *oladdr;
2615
2616 atomic_add_int(&stcb->asoc.refcnt, 1);
2617 SCTP_TCB_UNLOCK(stcb);
2618 SCTP_INP_INFO_WLOCK();
2619 SCTP_INP_WLOCK(old_inp);
2620 SCTP_INP_WLOCK(new_inp);
2621 SCTP_TCB_LOCK(stcb);
2622 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2623
2624 #ifdef INET6
2625 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2626 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS;
2627 if (old_inp->ip_inp.inp.in6p_outputopts) {
2628 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT);
2629 }
2630 }
2631 #endif
2632 #if defined(INET) && defined(INET6)
2633 else
2634 #endif
2635 #ifdef INET
2636 {
2637 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos;
2638 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl;
2639 }
2640 #endif
2641 new_inp->sctp_ep.time_of_secret_change =
2642 old_inp->sctp_ep.time_of_secret_change;
2643 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2644 sizeof(old_inp->sctp_ep.secret_key));
2645 new_inp->sctp_ep.current_secret_number =
2646 old_inp->sctp_ep.current_secret_number;
2647 new_inp->sctp_ep.last_secret_number =
2648 old_inp->sctp_ep.last_secret_number;
2649 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2650
2651 /* make it so new data pours into the new socket */
2652 stcb->sctp_socket = new_inp->sctp_socket;
2653 stcb->sctp_ep = new_inp;
2654
2655 /* Copy the port across */
2656 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2657 rport = stcb->rport;
2658 /* Pull the tcb from the old association */
2659 LIST_REMOVE(stcb, sctp_tcbhash);
2660 LIST_REMOVE(stcb, sctp_tcblist);
2661 if (stcb->asoc.in_asocid_hash) {
2662 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2663 }
2664 /* Now insert the new_inp into the TCP connected hash */
2665 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2666
2667 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2668 /* Its safe to access */
2669 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2670
2671 /* Now move the tcb into the endpoint list */
2672 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2673 /*
2674 * Question, do we even need to worry about the ep-hash since we
2675 * only have one connection? Probably not :> so lets get rid of it
2676 * and not suck up any kernel memory in that.
2677 */
2678 if (stcb->asoc.in_asocid_hash) {
2679 struct sctpasochead *lhd;
2680
2681 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2682 new_inp->hashasocidmark)];
2683 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2684 }
2685 /* Ok. Let's restart timer. */
2686 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2687 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2688 stcb, net);
2689 }
2690
2691 SCTP_INP_INFO_WUNLOCK();
2692 if (new_inp->sctp_tcbhash != NULL) {
2693 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2694 new_inp->sctp_tcbhash = NULL;
2695 }
2696 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2697 /* Subset bound, so copy in the laddr list from the old_inp */
2698 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2699 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2700 if (laddr == NULL) {
2701 /*
2702 * Gak, what can we do? This assoc is really
2703 * HOSED. We probably should send an abort
2704 * here.
2705 */
2706 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2707 continue;
2708 }
2709 SCTP_INCR_LADDR_COUNT();
2710 memset(laddr, 0, sizeof(*laddr));
2711 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2712 laddr->ifa = oladdr->ifa;
2713 atomic_add_int(&laddr->ifa->refcount, 1);
2714 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2715 sctp_nxt_addr);
2716 new_inp->laddr_count++;
2717 if (oladdr == stcb->asoc.last_used_address) {
2718 stcb->asoc.last_used_address = laddr;
2719 }
2720 }
2721 }
2722 /* Now any running timers need to be adjusted. */
2723 if (stcb->asoc.dack_timer.ep == old_inp) {
2724 SCTP_INP_DECR_REF(old_inp);
2725 stcb->asoc.dack_timer.ep = new_inp;
2726 SCTP_INP_INCR_REF(new_inp);
2727 }
2728 if (stcb->asoc.asconf_timer.ep == old_inp) {
2729 SCTP_INP_DECR_REF(old_inp);
2730 stcb->asoc.asconf_timer.ep = new_inp;
2731 SCTP_INP_INCR_REF(new_inp);
2732 }
2733 if (stcb->asoc.strreset_timer.ep == old_inp) {
2734 SCTP_INP_DECR_REF(old_inp);
2735 stcb->asoc.strreset_timer.ep = new_inp;
2736 SCTP_INP_INCR_REF(new_inp);
2737 }
2738 if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2739 SCTP_INP_DECR_REF(old_inp);
2740 stcb->asoc.shut_guard_timer.ep = new_inp;
2741 SCTP_INP_INCR_REF(new_inp);
2742 }
2743 if (stcb->asoc.autoclose_timer.ep == old_inp) {
2744 SCTP_INP_DECR_REF(old_inp);
2745 stcb->asoc.autoclose_timer.ep = new_inp;
2746 SCTP_INP_INCR_REF(new_inp);
2747 }
2748 if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2749 SCTP_INP_DECR_REF(old_inp);
2750 stcb->asoc.delete_prim_timer.ep = new_inp;
2751 SCTP_INP_INCR_REF(new_inp);
2752 }
2753 /* now what about the nets? */
2754 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2755 if (net->pmtu_timer.ep == old_inp) {
2756 SCTP_INP_DECR_REF(old_inp);
2757 net->pmtu_timer.ep = new_inp;
2758 SCTP_INP_INCR_REF(new_inp);
2759 }
2760 if (net->hb_timer.ep == old_inp) {
2761 SCTP_INP_DECR_REF(old_inp);
2762 net->hb_timer.ep = new_inp;
2763 SCTP_INP_INCR_REF(new_inp);
2764 }
2765 if (net->rxt_timer.ep == old_inp) {
2766 SCTP_INP_DECR_REF(old_inp);
2767 net->rxt_timer.ep = new_inp;
2768 SCTP_INP_INCR_REF(new_inp);
2769 }
2770 }
2771 SCTP_INP_WUNLOCK(new_inp);
2772 SCTP_INP_WUNLOCK(old_inp);
2773 }
2774
2775 /*
2776 * insert an laddr entry with the given ifa for the desired list
2777 */
2778 static int
sctp_insert_laddr(struct sctpladdr * list,struct sctp_ifa * ifa,uint32_t act)2779 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2780 {
2781 struct sctp_laddr *laddr;
2782
2783 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2784 if (laddr == NULL) {
2785 /* out of memory? */
2786 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2787 return (EINVAL);
2788 }
2789 SCTP_INCR_LADDR_COUNT();
2790 memset(laddr, 0, sizeof(*laddr));
2791 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2792 laddr->ifa = ifa;
2793 laddr->action = act;
2794 atomic_add_int(&ifa->refcount, 1);
2795 /* insert it */
2796 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2797
2798 return (0);
2799 }
2800
2801 /*
2802 * Remove an laddr entry from the local address list (on an assoc)
2803 */
2804 static void
sctp_remove_laddr(struct sctp_laddr * laddr)2805 sctp_remove_laddr(struct sctp_laddr *laddr)
2806 {
2807
2808 /* remove from the list */
2809 LIST_REMOVE(laddr, sctp_nxt_addr);
2810 sctp_free_ifa(laddr->ifa);
2811 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2812 SCTP_DECR_LADDR_COUNT();
2813 }
2814
2815 /*
2816 * Bind the socket, with the PCB and global info locks held. Note, if a
2817 * socket address is specified, the PCB lock may be dropped and re-acquired.
2818 *
2819 * sctp_ifap is used to bypass normal local address validation checks.
2820 */
2821 int
sctp_inpcb_bind_locked(struct sctp_inpcb * inp,struct sockaddr * addr,struct sctp_ifa * sctp_ifap,struct thread * td)2822 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr,
2823 struct sctp_ifa *sctp_ifap, struct thread *td)
2824 {
2825 /* bind a ep to a socket address */
2826 struct sctppcbhead *head;
2827 struct sctp_inpcb *inp_tmp;
2828 struct inpcb *ip_inp;
2829 int port_reuse_active = 0;
2830 int bindall;
2831 uint16_t lport;
2832 int error;
2833 uint32_t vrf_id;
2834
2835 KASSERT(td != NULL, ("%s: null thread", __func__));
2836
2837 error = 0;
2838 lport = 0;
2839 bindall = 1;
2840 ip_inp = &inp->ip_inp.inp;
2841
2842 SCTP_INP_INFO_WLOCK_ASSERT();
2843 SCTP_INP_WLOCK_ASSERT(inp);
2844
2845 #ifdef SCTP_DEBUG
2846 if (addr) {
2847 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2848 ntohs(((struct sockaddr_in *)addr)->sin_port));
2849 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2850 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2851 }
2852 #endif
2853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2854 error = EINVAL;
2855 /* already did a bind, subsequent binds NOT allowed ! */
2856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2857 goto out;
2858 }
2859 if (addr != NULL) {
2860 switch (addr->sa_family) {
2861 #ifdef INET
2862 case AF_INET:
2863 {
2864 struct sockaddr_in *sin;
2865
2866 /* IPV6_V6ONLY socket? */
2867 if (SCTP_IPV6_V6ONLY(inp)) {
2868 error = EINVAL;
2869 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2870 goto out;
2871 }
2872 if (addr->sa_len != sizeof(*sin)) {
2873 error = EINVAL;
2874 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2875 goto out;
2876 }
2877
2878 sin = (struct sockaddr_in *)addr;
2879 lport = sin->sin_port;
2880 /*
2881 * For LOOPBACK the prison_local_ip4() call
2882 * will transmute the ip address to the
2883 * proper value.
2884 */
2885 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) {
2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2887 goto out;
2888 }
2889 if (sin->sin_addr.s_addr != INADDR_ANY) {
2890 bindall = 0;
2891 }
2892 break;
2893 }
2894 #endif
2895 #ifdef INET6
2896 case AF_INET6:
2897 {
2898 /*
2899 * Only for pure IPv6 Address. (No IPv4
2900 * Mapped!)
2901 */
2902 struct sockaddr_in6 *sin6;
2903
2904 sin6 = (struct sockaddr_in6 *)addr;
2905 if (addr->sa_len != sizeof(*sin6)) {
2906 error = EINVAL;
2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2908 goto out;
2909 }
2910 lport = sin6->sin6_port;
2911 /*
2912 * For LOOPBACK the prison_local_ip6() call
2913 * will transmute the ipv6 address to the
2914 * proper value.
2915 */
2916 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr,
2917 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2918 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2919 goto out;
2920 }
2921 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2922 bindall = 0;
2923 /* KAME hack: embed scopeid */
2924 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2925 error = EINVAL;
2926 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2927 goto out;
2928 }
2929 }
2930 /* this must be cleared for ifa_ifwithaddr() */
2931 sin6->sin6_scope_id = 0;
2932 break;
2933 }
2934 #endif
2935 default:
2936 error = EAFNOSUPPORT;
2937 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2938 goto out;
2939 }
2940 }
2941 /* Setup a vrf_id to be the default for the non-bind-all case. */
2942 vrf_id = inp->def_vrf_id;
2943
2944 if (lport) {
2945 /*
2946 * Did the caller specify a port? if so we must see if an ep
2947 * already has this one bound.
2948 */
2949 /* got to be root to get at low ports */
2950 if (ntohs(lport) < IPPORT_RESERVED &&
2951 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
2952 goto out;
2953 }
2954 SCTP_INP_INCR_REF(inp);
2955 SCTP_INP_WUNLOCK(inp);
2956 if (bindall) {
2957 vrf_id = inp->def_vrf_id;
2958 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2959 if (inp_tmp != NULL) {
2960 /*
2961 * lock guy returned and lower count note
2962 * that we are not bound so inp_tmp should
2963 * NEVER be inp. And it is this inp
2964 * (inp_tmp) that gets the reference bump,
2965 * so we must lower it.
2966 */
2967 SCTP_INP_DECR_REF(inp_tmp);
2968 /* unlock info */
2969 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2970 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2971 /*
2972 * Ok, must be one-2-one and
2973 * allowing port re-use
2974 */
2975 port_reuse_active = 1;
2976 goto continue_anyway;
2977 }
2978 SCTP_INP_WLOCK(inp);
2979 SCTP_INP_DECR_REF(inp);
2980 error = EADDRINUSE;
2981 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2982 goto out;
2983 }
2984 } else {
2985 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2986 if (inp_tmp != NULL) {
2987 /*
2988 * lock guy returned and lower count note
2989 * that we are not bound so inp_tmp should
2990 * NEVER be inp. And it is this inp
2991 * (inp_tmp) that gets the reference bump,
2992 * so we must lower it.
2993 */
2994 SCTP_INP_DECR_REF(inp_tmp);
2995 /* unlock info */
2996 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2997 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2998 /*
2999 * Ok, must be one-2-one and
3000 * allowing port re-use
3001 */
3002 port_reuse_active = 1;
3003 goto continue_anyway;
3004 }
3005 SCTP_INP_WLOCK(inp);
3006 SCTP_INP_DECR_REF(inp);
3007 error = EADDRINUSE;
3008 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3009 goto out;
3010 }
3011 }
3012 continue_anyway:
3013 SCTP_INP_WLOCK(inp);
3014 SCTP_INP_DECR_REF(inp);
3015 if (bindall) {
3016 /* verify that no lport is not used by a singleton */
3017 if ((port_reuse_active == 0) &&
3018 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3019 /* Sorry someone already has this one bound */
3020 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3021 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3022 port_reuse_active = 1;
3023 } else {
3024 error = EADDRINUSE;
3025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3026 goto out;
3027 }
3028 }
3029 }
3030 } else {
3031 uint16_t first, last, candidate;
3032 uint16_t count;
3033
3034 if (ip_inp->inp_flags & INP_HIGHPORT) {
3035 first = MODULE_GLOBAL(ipport_hifirstauto);
3036 last = MODULE_GLOBAL(ipport_hilastauto);
3037 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3038 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
3039 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3040 goto out;
3041 }
3042 first = MODULE_GLOBAL(ipport_lowfirstauto);
3043 last = MODULE_GLOBAL(ipport_lowlastauto);
3044 } else {
3045 first = MODULE_GLOBAL(ipport_firstauto);
3046 last = MODULE_GLOBAL(ipport_lastauto);
3047 }
3048 if (first > last) {
3049 uint16_t temp;
3050
3051 temp = first;
3052 first = last;
3053 last = temp;
3054 }
3055 count = last - first + 1; /* number of candidates */
3056 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3057
3058 for (;;) {
3059 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3060 lport = htons(candidate);
3061 break;
3062 }
3063 if (--count == 0) {
3064 error = EADDRINUSE;
3065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3066 goto out;
3067 }
3068 if (candidate == last)
3069 candidate = first;
3070 else
3071 candidate = candidate + 1;
3072 }
3073 }
3074 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3075 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3076 /*
3077 * this really should not happen. The guy did a non-blocking
3078 * bind and then did a close at the same time.
3079 */
3080 error = EINVAL;
3081 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3082 goto out;
3083 }
3084 /* ok we look clear to give out this port, so lets setup the binding */
3085 if (bindall) {
3086 /* binding to all addresses, so just set in the proper flags */
3087 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3088 /* set the automatic addr changes from kernel flag */
3089 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3090 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3092 } else {
3093 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3094 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3095 }
3096 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3097 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3098 } else {
3099 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3100 }
3101 /*
3102 * set the automatic mobility_base from kernel flag (by
3103 * micchie)
3104 */
3105 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3108 } else {
3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3111 }
3112 /*
3113 * set the automatic mobility_fasthandoff from kernel flag
3114 * (by micchie)
3115 */
3116 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3117 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3118 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3119 } else {
3120 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3121 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3122 }
3123 } else {
3124 /*
3125 * bind specific, make sure flags is off and add a new
3126 * address structure to the sctp_addr_list inside the ep
3127 * structure.
3128 *
3129 * We will need to allocate one and insert it at the head.
3130 * The socketopt call can just insert new addresses in there
3131 * as well. It will also have to do the embed scope kame
3132 * hack too (before adding).
3133 */
3134 struct sctp_ifa *ifa;
3135 union sctp_sockstore store;
3136
3137 memset(&store, 0, sizeof(store));
3138 switch (addr->sa_family) {
3139 #ifdef INET
3140 case AF_INET:
3141 memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3142 store.sin.sin_port = 0;
3143 break;
3144 #endif
3145 #ifdef INET6
3146 case AF_INET6:
3147 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3148 store.sin6.sin6_port = 0;
3149 break;
3150 #endif
3151 default:
3152 break;
3153 }
3154 /*
3155 * first find the interface with the bound address need to
3156 * zero out the port to find the address! yuck! can't do
3157 * this earlier since need port for sctp_pcb_findep()
3158 */
3159 if (sctp_ifap != NULL) {
3160 ifa = sctp_ifap;
3161 } else {
3162 /*
3163 * Note for BSD we hit here always other O/S's will
3164 * pass things in via the sctp_ifap argument.
3165 */
3166 ifa = sctp_find_ifa_by_addr(&store.sa,
3167 vrf_id, SCTP_ADDR_NOT_LOCKED);
3168 }
3169 if (ifa == NULL) {
3170 error = EADDRNOTAVAIL;
3171 /* Can't find an interface with that address */
3172 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3173 goto out;
3174 }
3175 #ifdef INET6
3176 if (addr->sa_family == AF_INET6) {
3177 /* GAK, more FIXME IFA lock? */
3178 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3179 /* Can't bind a non-existent addr. */
3180 error = EINVAL;
3181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3182 goto out;
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 goto out;
3197 inp->laddr_count++;
3198 }
3199 /* find the bucket */
3200 if (port_reuse_active) {
3201 /* Put it into tcp 1-2-1 hash */
3202 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3203 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3204 } else {
3205 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3206 }
3207 /* put it in the bucket */
3208 LIST_INSERT_HEAD(head, inp, sctp_hash);
3209 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3210 (void *)head, ntohs(lport), port_reuse_active);
3211 /* set in the port */
3212 inp->sctp_lport = lport;
3213
3214 /* turn off just the unbound flag */
3215 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0,
3216 ("%s: inp %p is already bound", __func__, inp));
3217 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3218 out:
3219 return (error);
3220 }
3221
3222 int
sctp_inpcb_bind(struct socket * so,struct sockaddr * addr,struct sctp_ifa * sctp_ifap,struct thread * td)3223 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3224 struct sctp_ifa *sctp_ifap, struct thread *td)
3225 {
3226 struct sctp_inpcb *inp;
3227 int error;
3228
3229 inp = so->so_pcb;
3230 SCTP_INP_INFO_WLOCK();
3231 SCTP_INP_WLOCK(inp);
3232 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td);
3233 SCTP_INP_WUNLOCK(inp);
3234 SCTP_INP_INFO_WUNLOCK();
3235 return (error);
3236 }
3237
3238 static void
sctp_iterator_inp_being_freed(struct sctp_inpcb * inp)3239 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3240 {
3241 struct sctp_iterator *it, *nit;
3242
3243 /*
3244 * We enter with the only the ITERATOR_LOCK in place and a write
3245 * lock on the inp_info stuff.
3246 */
3247 it = sctp_it_ctl.cur_it;
3248 if (it && (it->vn != curvnet)) {
3249 /* Its not looking at our VNET */
3250 return;
3251 }
3252 if (it && (it->inp == inp)) {
3253 /*
3254 * This is tricky and we hold the iterator lock, but when it
3255 * returns and gets the lock (when we release it) the
3256 * iterator will try to operate on inp. We need to stop that
3257 * from happening. But of course the iterator has a
3258 * reference on the stcb and inp. We can mark it and it will
3259 * stop.
3260 *
3261 * If its a single iterator situation, we set the end
3262 * iterator flag. Otherwise we set the iterator to go to the
3263 * next inp.
3264 *
3265 */
3266 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3267 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3268 } else {
3269 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3270 }
3271 }
3272 /*
3273 * Now go through and remove any single reference to our inp that
3274 * may be still pending on the list
3275 */
3276 SCTP_IPI_ITERATOR_WQ_LOCK();
3277 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3278 if (it->vn != curvnet) {
3279 continue;
3280 }
3281 if (it->inp == inp) {
3282 /* This one points to me is it inp specific? */
3283 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3284 /* Remove and free this one */
3285 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3286 it, sctp_nxt_itr);
3287 if (it->function_atend != NULL) {
3288 (*it->function_atend) (it->pointer, it->val);
3289 }
3290 SCTP_FREE(it, SCTP_M_ITER);
3291 } else {
3292 it->inp = LIST_NEXT(it->inp, sctp_list);
3293 if (it->inp) {
3294 SCTP_INP_INCR_REF(it->inp);
3295 }
3296 }
3297 /*
3298 * When its put in the refcnt is incremented so decr
3299 * it
3300 */
3301 SCTP_INP_DECR_REF(inp);
3302 }
3303 }
3304 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3305 }
3306
3307 /* release sctp_inpcb unbind the port */
3308 void
sctp_inpcb_free(struct sctp_inpcb * inp,int immediate,int from)3309 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3310 {
3311 /*
3312 * Here we free a endpoint. We must find it (if it is in the Hash
3313 * table) and remove it from there. Then we must also find it in the
3314 * overall list and remove it from there. After all removals are
3315 * complete then any timer has to be stopped. Then start the actual
3316 * freeing. a) Any local lists. b) Any associations. c) The hash of
3317 * all associations. d) finally the ep itself.
3318 */
3319 struct sctp_tcb *stcb, *nstcb;
3320 struct sctp_laddr *laddr, *nladdr;
3321 struct inpcb *ip_pcb;
3322 struct socket *so;
3323 int being_refed = 0;
3324 struct sctp_queued_to_read *sq, *nsq;
3325 int cnt;
3326 sctp_sharedkey_t *shared_key, *nshared_key;
3327
3328 #ifdef SCTP_LOG_CLOSING
3329 sctp_log_closing(inp, NULL, 0);
3330 #endif
3331 SCTP_ITERATOR_LOCK();
3332 /* mark any iterators on the list or being processed */
3333 sctp_iterator_inp_being_freed(inp);
3334 SCTP_ITERATOR_UNLOCK();
3335
3336 SCTP_ASOC_CREATE_LOCK(inp);
3337 SCTP_INP_INFO_WLOCK();
3338 SCTP_INP_WLOCK(inp);
3339 so = inp->sctp_socket;
3340 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0,
3341 ("%s: inp %p still has socket", __func__, inp));
3342 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0,
3343 ("%s: double free of inp %p", __func__, inp));
3344 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3345 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3346 /* socket is gone, so no more wakeups allowed */
3347 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3348 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3349 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3350 }
3351 /* First time through we have the socket lock, after that no more. */
3352 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3353 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3354
3355 if (inp->control) {
3356 sctp_m_freem(inp->control);
3357 inp->control = NULL;
3358 }
3359 if (inp->pkt) {
3360 sctp_m_freem(inp->pkt);
3361 inp->pkt = NULL;
3362 }
3363 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3364 * here but I will be nice :> (i.e.
3365 * ip_pcb = ep;) */
3366 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3367 int cnt_in_sd;
3368
3369 cnt_in_sd = 0;
3370 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) {
3371 SCTP_TCB_LOCK(stcb);
3372 /* Disconnect the socket please. */
3373 stcb->sctp_socket = NULL;
3374 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET);
3375 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3376 /* Skip guys being freed */
3377 cnt_in_sd++;
3378 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3379 /*
3380 * Special case - we did not start a
3381 * kill timer on the asoc due to it
3382 * was not closed. So go ahead and
3383 * start it now.
3384 */
3385 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
3386 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3387 }
3388 SCTP_TCB_UNLOCK(stcb);
3389 continue;
3390 }
3391 if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
3392 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) &&
3393 (stcb->asoc.total_output_queue_size == 0)) {
3394 /*
3395 * If we have data in queue, we don't want
3396 * to just free since the app may have done,
3397 * send()/close or connect/send/close. And
3398 * it wants the data to get across first.
3399 */
3400 /* Just abandon things in the front states */
3401 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE,
3402 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3403 cnt_in_sd++;
3404 }
3405 continue;
3406 }
3407 if ((stcb->asoc.size_on_reasm_queue > 0) ||
3408 (stcb->asoc.size_on_all_streams > 0) ||
3409 ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) {
3410 /* Left with Data unread */
3411 struct mbuf *op_err;
3412
3413 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3414 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3415 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3416 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3417 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3418 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3419 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3420 }
3421 if (sctp_free_assoc(inp, stcb,
3422 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3423 cnt_in_sd++;
3424 }
3425 continue;
3426 } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
3427 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
3428 (stcb->asoc.stream_queue_cnt == 0)) {
3429 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) {
3430 goto abort_anyway;
3431 }
3432 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
3433 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3434 struct sctp_nets *netp;
3435
3436 /*
3437 * there is nothing queued to send,
3438 * so I send shutdown
3439 */
3440 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3441 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3442 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3443 }
3444 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
3445 sctp_stop_timers_for_shutdown(stcb);
3446 if (stcb->asoc.alternate) {
3447 netp = stcb->asoc.alternate;
3448 } else {
3449 netp = stcb->asoc.primary_destination;
3450 }
3451 sctp_send_shutdown(stcb, netp);
3452 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
3453 netp);
3454 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL);
3455 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3456 }
3457 } else {
3458 /* mark into shutdown pending */
3459 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
3460 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) {
3461 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
3462 }
3463 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
3464 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
3465 (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3466 struct mbuf *op_err;
3467
3468 abort_anyway:
3469 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3470 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3471 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3472 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3473 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3474 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3475 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3476 }
3477 if (sctp_free_assoc(inp, stcb,
3478 SCTP_PCBFREE_NOFORCE,
3479 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3480 cnt_in_sd++;
3481 }
3482 continue;
3483 } else {
3484 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3485 }
3486 }
3487 cnt_in_sd++;
3488 SCTP_TCB_UNLOCK(stcb);
3489 }
3490 /* now is there some left in our SHUTDOWN state? */
3491 if (cnt_in_sd) {
3492 #ifdef SCTP_LOG_CLOSING
3493 sctp_log_closing(inp, NULL, 2);
3494 #endif
3495 inp->sctp_socket = NULL;
3496 SCTP_INP_WUNLOCK(inp);
3497 SCTP_ASOC_CREATE_UNLOCK(inp);
3498 SCTP_INP_INFO_WUNLOCK();
3499 return;
3500 }
3501 }
3502 inp->sctp_socket = NULL;
3503 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3504 /*
3505 * ok, this guy has been bound. It's port is somewhere in
3506 * the SCTP_BASE_INFO(hash table). Remove it!
3507 */
3508 LIST_REMOVE(inp, sctp_hash);
3509 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3510 }
3511
3512 /*
3513 * If there is a timer running to kill us, forget it, since it may
3514 * have a contest on the INP lock.. which would cause us to die ...
3515 */
3516 cnt = 0;
3517 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) {
3518 SCTP_TCB_LOCK(stcb);
3519 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3520 /* Disconnect the socket please */
3521 stcb->sctp_socket = NULL;
3522 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET);
3523 }
3524 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3525 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3526 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
3527 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3528 }
3529 cnt++;
3530 SCTP_TCB_UNLOCK(stcb);
3531 continue;
3532 }
3533 /* Free associations that are NOT killing us */
3534 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) &&
3535 ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3536 struct mbuf *op_err;
3537
3538 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3539 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3540 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3541 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3542 } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3543 cnt++;
3544 SCTP_TCB_UNLOCK(stcb);
3545 continue;
3546 }
3547 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3548 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3549 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3550 }
3551 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
3552 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3553 cnt++;
3554 }
3555 }
3556 if (cnt) {
3557 /* Ok we have someone out there that will kill us */
3558 #ifdef SCTP_LOG_CLOSING
3559 sctp_log_closing(inp, NULL, 3);
3560 #endif
3561 SCTP_INP_WUNLOCK(inp);
3562 SCTP_ASOC_CREATE_UNLOCK(inp);
3563 SCTP_INP_INFO_WUNLOCK();
3564 return;
3565 }
3566 if (SCTP_INP_LOCK_CONTENDED(inp))
3567 being_refed++;
3568 if (SCTP_INP_READ_CONTENDED(inp))
3569 being_refed++;
3570 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3571 being_refed++;
3572 /* NOTE: 0 refcount also means no timers are referencing us. */
3573 if ((inp->refcount) ||
3574 (being_refed) ||
3575 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3576 #ifdef SCTP_LOG_CLOSING
3577 sctp_log_closing(inp, NULL, 4);
3578 #endif
3579 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3580 SCTP_INP_WUNLOCK(inp);
3581 SCTP_ASOC_CREATE_UNLOCK(inp);
3582 SCTP_INP_INFO_WUNLOCK();
3583 return;
3584 }
3585 inp->sctp_ep.signature_change.type = 0;
3586 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3587 /*
3588 * Remove it from the list .. last thing we need a lock for.
3589 */
3590 LIST_REMOVE(inp, sctp_list);
3591 SCTP_INP_WUNLOCK(inp);
3592 SCTP_ASOC_CREATE_UNLOCK(inp);
3593 SCTP_INP_INFO_WUNLOCK();
3594
3595 #ifdef SCTP_LOG_CLOSING
3596 sctp_log_closing(inp, NULL, 5);
3597 #endif
3598 if ((inp->sctp_asocidhash) != NULL) {
3599 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3600 inp->sctp_asocidhash = NULL;
3601 }
3602 /* sa_ignore FREED_MEMORY */
3603 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3604 /* Its only abandoned if it had data left */
3605 if (sq->length)
3606 SCTP_STAT_INCR(sctps_left_abandon);
3607
3608 TAILQ_REMOVE(&inp->read_queue, sq, next);
3609 sctp_free_remote_addr(sq->whoFrom);
3610 if (so)
3611 SCTP_SB_DECR(&so->so_rcv, sq->length);
3612 if (sq->data) {
3613 sctp_m_freem(sq->data);
3614 sq->data = NULL;
3615 }
3616 /*
3617 * no need to free the net count, since at this point all
3618 * assoc's are gone.
3619 */
3620 sctp_free_a_readq(NULL, sq);
3621 }
3622 /* Now the sctp_pcb things */
3623 /*
3624 * free each asoc if it is not already closed/free. we can't use the
3625 * macro here since le_next will get freed as part of the
3626 * sctp_free_assoc() call.
3627 */
3628 if (ip_pcb->inp_options) {
3629 (void)sctp_m_free(ip_pcb->inp_options);
3630 ip_pcb->inp_options = 0;
3631 }
3632 #ifdef INET6
3633 if (ip_pcb->inp_vflag & INP_IPV6) {
3634 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3635 }
3636 #endif /* INET6 */
3637 ip_pcb->inp_vflag = 0;
3638 /* free up authentication fields */
3639 if (inp->sctp_ep.local_auth_chunks != NULL)
3640 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3641 if (inp->sctp_ep.local_hmacs != NULL)
3642 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3643
3644 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3645 LIST_REMOVE(shared_key, next);
3646 sctp_free_sharedkey(shared_key);
3647 /* sa_ignore FREED_MEMORY */
3648 }
3649
3650 /*
3651 * if we have an address list the following will free the list of
3652 * ifaddr's that are set into this ep. Again macro limitations here,
3653 * since the LIST_FOREACH could be a bad idea.
3654 */
3655 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3656 sctp_remove_laddr(laddr);
3657 }
3658
3659 #ifdef SCTP_TRACK_FREED_ASOCS
3660 /* TEMP CODE */
3661 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) {
3662 LIST_REMOVE(stcb, sctp_tcblist);
3663 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
3664 SCTP_DECR_ASOC_COUNT();
3665 }
3666 /* *** END TEMP CODE *** */
3667 #endif
3668 /* Now lets see about freeing the EP hash table. */
3669 if (inp->sctp_tcbhash != NULL) {
3670 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3671 inp->sctp_tcbhash = NULL;
3672 }
3673 /* Now we must put the ep memory back into the zone pool */
3674 crfree(inp->ip_inp.inp.inp_cred);
3675 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3676 SCTP_INP_LOCK_DESTROY(inp);
3677 SCTP_INP_READ_LOCK_DESTROY(inp);
3678 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3679 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3680 SCTP_DECR_EP_COUNT();
3681 }
3682
3683 struct sctp_nets *
sctp_findnet(struct sctp_tcb * stcb,struct sockaddr * addr)3684 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3685 {
3686 struct sctp_nets *net;
3687
3688 /* locate the address */
3689 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3690 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3691 return (net);
3692 }
3693 return (NULL);
3694 }
3695
3696 int
sctp_is_address_on_local_host(struct sockaddr * addr,uint32_t vrf_id)3697 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3698 {
3699 struct sctp_ifa *sctp_ifa;
3700
3701 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3702 if (sctp_ifa) {
3703 return (1);
3704 } else {
3705 return (0);
3706 }
3707 }
3708
3709 /*
3710 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3711 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3712 * stats of stuff.
3713 */
3714 int
sctp_add_remote_addr(struct sctp_tcb * stcb,struct sockaddr * newaddr,struct sctp_nets ** netp,uint16_t port,int set_scope,int from)3715 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3716 struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3717 {
3718 /*
3719 * The following is redundant to the same lines in the
3720 * sctp_aloc_assoc() but is needed since others call the add address
3721 * function
3722 */
3723 struct sctp_nets *net, *netfirst;
3724 int addr_inscope;
3725
3726 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3727 from);
3728 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3729
3730 netfirst = sctp_findnet(stcb, newaddr);
3731 if (netfirst) {
3732 /*
3733 * Lie and return ok, we don't want to make the association
3734 * go away for this behavior. It will happen in the TCP
3735 * model in a connected socket. It does not reach the hash
3736 * table until after the association is built so it can't be
3737 * found. Mark as reachable, since the initial creation will
3738 * have been cleared and the NOT_IN_ASSOC flag will have
3739 * been added... and we don't want to end up removing it
3740 * back out.
3741 */
3742 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3743 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3744 SCTP_ADDR_UNCONFIRMED);
3745 } else {
3746 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3747 }
3748
3749 return (0);
3750 }
3751 addr_inscope = 1;
3752 switch (newaddr->sa_family) {
3753 #ifdef INET
3754 case AF_INET:
3755 {
3756 struct sockaddr_in *sin;
3757
3758 sin = (struct sockaddr_in *)newaddr;
3759 if (sin->sin_addr.s_addr == 0) {
3760 /* Invalid address */
3761 return (-1);
3762 }
3763 /* zero out the zero area */
3764 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3765
3766 /* assure len is set */
3767 sin->sin_len = sizeof(struct sockaddr_in);
3768 if (set_scope) {
3769 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3770 stcb->asoc.scope.ipv4_local_scope = 1;
3771 }
3772 } else {
3773 /* Validate the address is in scope */
3774 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3775 (stcb->asoc.scope.ipv4_local_scope == 0)) {
3776 addr_inscope = 0;
3777 }
3778 }
3779 break;
3780 }
3781 #endif
3782 #ifdef INET6
3783 case AF_INET6:
3784 {
3785 struct sockaddr_in6 *sin6;
3786
3787 sin6 = (struct sockaddr_in6 *)newaddr;
3788 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3789 /* Invalid address */
3790 return (-1);
3791 }
3792 /* assure len is set */
3793 sin6->sin6_len = sizeof(struct sockaddr_in6);
3794 if (set_scope) {
3795 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3796 stcb->asoc.scope.loopback_scope = 1;
3797 stcb->asoc.scope.local_scope = 0;
3798 stcb->asoc.scope.ipv4_local_scope = 1;
3799 stcb->asoc.scope.site_scope = 1;
3800 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3801 /*
3802 * If the new destination is a
3803 * LINK_LOCAL we must have common
3804 * site scope. Don't set the local
3805 * scope since we may not share all
3806 * links, only loopback can do this.
3807 * Links on the local network would
3808 * also be on our private network
3809 * for v4 too.
3810 */
3811 stcb->asoc.scope.ipv4_local_scope = 1;
3812 stcb->asoc.scope.site_scope = 1;
3813 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3814 /*
3815 * If the new destination is
3816 * SITE_LOCAL then we must have site
3817 * scope in common.
3818 */
3819 stcb->asoc.scope.site_scope = 1;
3820 }
3821 } else {
3822 /* Validate the address is in scope */
3823 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3824 (stcb->asoc.scope.loopback_scope == 0)) {
3825 addr_inscope = 0;
3826 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3827 (stcb->asoc.scope.local_scope == 0)) {
3828 addr_inscope = 0;
3829 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3830 (stcb->asoc.scope.site_scope == 0)) {
3831 addr_inscope = 0;
3832 }
3833 }
3834 break;
3835 }
3836 #endif
3837 default:
3838 /* not supported family type */
3839 return (-1);
3840 }
3841 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3842 if (net == NULL) {
3843 return (-1);
3844 }
3845 SCTP_INCR_RADDR_COUNT();
3846 memset(net, 0, sizeof(struct sctp_nets));
3847 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3848 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3849 switch (newaddr->sa_family) {
3850 #ifdef INET
3851 case AF_INET:
3852 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3853 break;
3854 #endif
3855 #ifdef INET6
3856 case AF_INET6:
3857 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3858 break;
3859 #endif
3860 default:
3861 break;
3862 }
3863 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3864 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3865 stcb->asoc.scope.loopback_scope = 1;
3866 stcb->asoc.scope.ipv4_local_scope = 1;
3867 stcb->asoc.scope.local_scope = 0;
3868 stcb->asoc.scope.site_scope = 1;
3869 addr_inscope = 1;
3870 }
3871 net->failure_threshold = stcb->asoc.def_net_failure;
3872 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3873 if (addr_inscope == 0) {
3874 net->dest_state = (SCTP_ADDR_REACHABLE |
3875 SCTP_ADDR_OUT_OF_SCOPE);
3876 } else {
3877 if (from == SCTP_ADDR_IS_CONFIRMED)
3878 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3879 net->dest_state = SCTP_ADDR_REACHABLE;
3880 else
3881 net->dest_state = SCTP_ADDR_REACHABLE |
3882 SCTP_ADDR_UNCONFIRMED;
3883 }
3884 /*
3885 * We set this to 0, the timer code knows that this means its an
3886 * initial value
3887 */
3888 net->rto_needed = 1;
3889 net->RTO = 0;
3890 net->RTO_measured = 0;
3891 stcb->asoc.numnets++;
3892 net->ref_count = 1;
3893 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3894 net->port = port;
3895 net->dscp = stcb->asoc.default_dscp;
3896 #ifdef INET6
3897 net->flowlabel = stcb->asoc.default_flowlabel;
3898 #endif
3899 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3900 net->dest_state |= SCTP_ADDR_NOHB;
3901 } else {
3902 net->dest_state &= ~SCTP_ADDR_NOHB;
3903 }
3904 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3905 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3906 } else {
3907 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3908 }
3909 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3910 /* Init the timer structure */
3911 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3912 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3913 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3914
3915 /* Now generate a route for this guy */
3916 #ifdef INET6
3917 /* KAME hack: embed scopeid */
3918 if (newaddr->sa_family == AF_INET6) {
3919 struct sockaddr_in6 *sin6;
3920
3921 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3922 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3923 sin6->sin6_scope_id = 0;
3924 }
3925 #endif
3926 SCTP_RTALLOC((sctp_route_t *)&net->ro,
3927 stcb->asoc.vrf_id,
3928 stcb->sctp_ep->fibnum);
3929
3930 net->src_addr_selected = 0;
3931 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3932 /* Get source address */
3933 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3934 stcb,
3935 (sctp_route_t *)&net->ro,
3936 net,
3937 0,
3938 stcb->asoc.vrf_id);
3939 if (stcb->asoc.default_mtu > 0) {
3940 net->mtu = stcb->asoc.default_mtu;
3941 switch (net->ro._l_addr.sa.sa_family) {
3942 #ifdef INET
3943 case AF_INET:
3944 net->mtu += SCTP_MIN_V4_OVERHEAD;
3945 break;
3946 #endif
3947 #ifdef INET6
3948 case AF_INET6:
3949 net->mtu += SCTP_MIN_OVERHEAD;
3950 break;
3951 #endif
3952 default:
3953 break;
3954 }
3955 #if defined(INET) || defined(INET6)
3956 if (net->port) {
3957 net->mtu += (uint32_t)sizeof(struct udphdr);
3958 }
3959 #endif
3960 } else if (net->ro._s_addr != NULL) {
3961 uint32_t imtu, rmtu, hcmtu;
3962
3963 net->src_addr_selected = 1;
3964 /* Now get the interface MTU */
3965 if (net->ro._s_addr->ifn_p != NULL) {
3966 /*
3967 * XXX: Should we here just use
3968 * net->ro._s_addr->ifn_p->ifn_mtu
3969 */
3970 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p,
3971 net->ro._s_addr->ifn_p->ifn_index);
3972 } else {
3973 imtu = 0;
3974 }
3975 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3976 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3977 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3978 }
3979 }
3980 if (net->mtu == 0) {
3981 if (stcb->asoc.default_mtu > 0) {
3982 net->mtu = stcb->asoc.default_mtu;
3983 switch (net->ro._l_addr.sa.sa_family) {
3984 #ifdef INET
3985 case AF_INET:
3986 net->mtu += SCTP_MIN_V4_OVERHEAD;
3987 break;
3988 #endif
3989 #ifdef INET6
3990 case AF_INET6:
3991 net->mtu += SCTP_MIN_OVERHEAD;
3992 break;
3993 #endif
3994 default:
3995 break;
3996 }
3997 #if defined(INET) || defined(INET6)
3998 if (net->port) {
3999 net->mtu += (uint32_t)sizeof(struct udphdr);
4000 }
4001 #endif
4002 } else {
4003 switch (newaddr->sa_family) {
4004 #ifdef INET
4005 case AF_INET:
4006 net->mtu = SCTP_DEFAULT_MTU;
4007 break;
4008 #endif
4009 #ifdef INET6
4010 case AF_INET6:
4011 net->mtu = 1280;
4012 break;
4013 #endif
4014 default:
4015 break;
4016 }
4017 }
4018 }
4019 #if defined(INET) || defined(INET6)
4020 if (net->port) {
4021 net->mtu -= (uint32_t)sizeof(struct udphdr);
4022 }
4023 #endif
4024 if (from == SCTP_ALLOC_ASOC) {
4025 stcb->asoc.smallest_mtu = net->mtu;
4026 }
4027 if (stcb->asoc.smallest_mtu > net->mtu) {
4028 sctp_pathmtu_adjustment(stcb, net->mtu, true);
4029 }
4030 #ifdef INET6
4031 if (newaddr->sa_family == AF_INET6) {
4032 struct sockaddr_in6 *sin6;
4033
4034 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4035 (void)sa6_recoverscope(sin6);
4036 }
4037 #endif
4038
4039 /* JRS - Use the congestion control given in the CC module */
4040 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4041 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4042
4043 /*
4044 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4045 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4046 */
4047 net->find_pseudo_cumack = 1;
4048 net->find_rtx_pseudo_cumack = 1;
4049 /* Choose an initial flowid. */
4050 net->flowid = stcb->asoc.my_vtag ^
4051 ntohs(stcb->rport) ^
4052 ntohs(stcb->sctp_ep->sctp_lport);
4053 net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4054 if (netp) {
4055 *netp = net;
4056 }
4057 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4058 if (net->ro.ro_nh == NULL) {
4059 /* Since we have no route put it at the back */
4060 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4061 } else if (netfirst == NULL) {
4062 /* We are the first one in the pool. */
4063 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4064 } else if (netfirst->ro.ro_nh == NULL) {
4065 /*
4066 * First one has NO route. Place this one ahead of the first
4067 * one.
4068 */
4069 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4070 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4071 /*
4072 * This one has a different interface than the one at the
4073 * top of the list. Place it ahead.
4074 */
4075 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4076 } else {
4077 /*
4078 * Ok we have the same interface as the first one. Move
4079 * forward until we find either a) one with a NULL route...
4080 * insert ahead of that b) one with a different ifp.. insert
4081 * after that. c) end of the list.. insert at the tail.
4082 */
4083 struct sctp_nets *netlook;
4084
4085 do {
4086 netlook = TAILQ_NEXT(netfirst, sctp_next);
4087 if (netlook == NULL) {
4088 /* End of the list */
4089 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4090 break;
4091 } else if (netlook->ro.ro_nh == NULL) {
4092 /* next one has NO route */
4093 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4094 break;
4095 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4096 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4097 net, sctp_next);
4098 break;
4099 }
4100 /* Shift forward */
4101 netfirst = netlook;
4102 } while (netlook != NULL);
4103 }
4104
4105 /* got to have a primary set */
4106 if (stcb->asoc.primary_destination == 0) {
4107 stcb->asoc.primary_destination = net;
4108 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4109 (net->ro.ro_nh) &&
4110 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4111 /* No route to current primary adopt new primary */
4112 stcb->asoc.primary_destination = net;
4113 }
4114 /* Validate primary is first */
4115 net = TAILQ_FIRST(&stcb->asoc.nets);
4116 if ((net != stcb->asoc.primary_destination) &&
4117 (stcb->asoc.primary_destination)) {
4118 /*
4119 * first one on the list is NOT the primary sctp_cmpaddr()
4120 * is much more efficient if the primary is the first on the
4121 * list, make it so.
4122 */
4123 TAILQ_REMOVE(&stcb->asoc.nets,
4124 stcb->asoc.primary_destination, sctp_next);
4125 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4126 stcb->asoc.primary_destination, sctp_next);
4127 }
4128 return (0);
4129 }
4130
4131 static uint32_t
sctp_aloc_a_assoc_id(struct sctp_inpcb * inp,struct sctp_tcb * stcb)4132 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4133 {
4134 uint32_t id;
4135 struct sctpasochead *head;
4136 struct sctp_tcb *lstcb;
4137
4138 try_again:
4139 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4140 /* TSNH */
4141 return (0);
4142 }
4143 /*
4144 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4145 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4146 */
4147 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4148 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4149 }
4150 id = inp->sctp_associd_counter;
4151 inp->sctp_associd_counter++;
4152 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4153 if (lstcb) {
4154 goto try_again;
4155 }
4156 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4157 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4158 stcb->asoc.in_asocid_hash = 1;
4159 return (id);
4160 }
4161
4162 /*
4163 * allocate an association and add it to the endpoint. The caller must be
4164 * careful to add all additional addresses once they are know right away or
4165 * else the assoc will be may experience a blackout scenario.
4166 */
4167 static struct sctp_tcb *
sctp_aloc_assoc_locked(struct sctp_inpcb * inp,struct sockaddr * firstaddr,int * error,uint32_t override_tag,uint32_t initial_tsn,uint32_t vrf_id,uint16_t o_streams,uint16_t port,struct thread * p,int initialize_auth_params)4168 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4169 int *error, uint32_t override_tag, uint32_t initial_tsn,
4170 uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4171 struct thread *p,
4172 int initialize_auth_params)
4173 {
4174 /* note the p argument is only valid in unbound sockets */
4175
4176 struct sctp_tcb *stcb;
4177 struct sctp_association *asoc;
4178 struct sctpasochead *head;
4179 uint16_t rport;
4180 int err;
4181
4182 SCTP_INP_INFO_WLOCK_ASSERT();
4183 SCTP_INP_WLOCK_ASSERT(inp);
4184
4185 /*
4186 * Assumption made here: Caller has done a
4187 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4188 * address does not exist already.
4189 */
4190 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4191 /* Hit max assoc, sorry no more */
4192 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4193 *error = ENOBUFS;
4194 return (NULL);
4195 }
4196 if (firstaddr == NULL) {
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_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4203 *error = EINVAL;
4204 return (NULL);
4205 }
4206 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4207 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4208 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4209 /*
4210 * If its in the TCP pool, its NOT allowed to create an
4211 * association. The parent listener needs to call
4212 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4213 * off, or connected one does this.. its an error.
4214 */
4215 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4216 *error = EINVAL;
4217 return (NULL);
4218 }
4219 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4220 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4222 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4223 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224 *error = EINVAL;
4225 return (NULL);
4226 }
4227 }
4228 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4229 #ifdef SCTP_DEBUG
4230 if (firstaddr) {
4231 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4232 switch (firstaddr->sa_family) {
4233 #ifdef INET
4234 case AF_INET:
4235 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4236 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4237 break;
4238 #endif
4239 #ifdef INET6
4240 case AF_INET6:
4241 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4242 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4243 break;
4244 #endif
4245 default:
4246 break;
4247 }
4248 } else {
4249 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4250 }
4251 #endif /* SCTP_DEBUG */
4252 switch (firstaddr->sa_family) {
4253 #ifdef INET
4254 case AF_INET:
4255 {
4256 struct sockaddr_in *sin;
4257
4258 sin = (struct sockaddr_in *)firstaddr;
4259 if ((ntohs(sin->sin_port) == 0) ||
4260 (sin->sin_addr.s_addr == INADDR_ANY) ||
4261 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4262 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4263 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
4264 (SCTP_IPV6_V6ONLY(inp) != 0))) {
4265 /* Invalid address */
4266 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4267 *error = EINVAL;
4268 return (NULL);
4269 }
4270 rport = sin->sin_port;
4271 break;
4272 }
4273 #endif
4274 #ifdef INET6
4275 case AF_INET6:
4276 {
4277 struct sockaddr_in6 *sin6;
4278
4279 sin6 = (struct sockaddr_in6 *)firstaddr;
4280 if ((ntohs(sin6->sin6_port) == 0) ||
4281 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4282 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4283 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4284 /* Invalid address */
4285 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4286 *error = EINVAL;
4287 return (NULL);
4288 }
4289 rport = sin6->sin6_port;
4290 break;
4291 }
4292 #endif
4293 default:
4294 /* not supported family type */
4295 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4296 *error = EINVAL;
4297 return (NULL);
4298 }
4299 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4300 /*
4301 * If you have not performed a bind, then we need to do the
4302 * ephemeral bind for you.
4303 */
4304 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) {
4305 /* bind error, probably perm */
4306 *error = err;
4307 return (NULL);
4308 }
4309 }
4310 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4311 if (stcb == NULL) {
4312 /* out of memory? */
4313 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4314 *error = ENOMEM;
4315 return (NULL);
4316 }
4317 SCTP_INCR_ASOC_COUNT();
4318
4319 memset(stcb, 0, sizeof(*stcb));
4320 asoc = &stcb->asoc;
4321
4322 SCTP_TCB_LOCK_INIT(stcb);
4323 stcb->rport = rport;
4324 /* setup back pointer's */
4325 stcb->sctp_ep = inp;
4326 stcb->sctp_socket = inp->sctp_socket;
4327 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) {
4328 /* failed */
4329 SCTP_TCB_LOCK_DESTROY(stcb);
4330 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4331 SCTP_DECR_ASOC_COUNT();
4332 *error = err;
4333 return (NULL);
4334 }
4335 SCTP_TCB_LOCK(stcb);
4336
4337 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4338 /* now that my_vtag is set, add it to the hash */
4339 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4340 /* put it in the bucket in the vtag hash of assoc's for the system */
4341 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4342
4343 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4344 /* failure.. memory error? */
4345 if (asoc->strmout) {
4346 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4347 asoc->strmout = NULL;
4348 }
4349 if (asoc->mapping_array) {
4350 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4351 asoc->mapping_array = NULL;
4352 }
4353 if (asoc->nr_mapping_array) {
4354 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4355 asoc->nr_mapping_array = NULL;
4356 }
4357 SCTP_DECR_ASOC_COUNT();
4358 SCTP_TCB_UNLOCK(stcb);
4359 SCTP_TCB_LOCK_DESTROY(stcb);
4360 LIST_REMOVE(stcb, sctp_asocs);
4361 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4362 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4363 SCTP_INP_WUNLOCK(inp);
4364 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4365 *error = ENOBUFS;
4366 return (NULL);
4367 }
4368 /* Init all the timers */
4369 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4370 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4371 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4372 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4373 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4374 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4375
4376 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4377 /* now file the port under the hash as well */
4378 if (inp->sctp_tcbhash != NULL) {
4379 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4380 inp->sctp_hashmark)];
4381 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4382 }
4383 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4384 sctp_initialize_auth_params(inp, stcb);
4385 }
4386 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4387 return (stcb);
4388 }
4389
4390 struct sctp_tcb *
sctp_aloc_assoc(struct sctp_inpcb * inp,struct sockaddr * firstaddr,int * error,uint32_t override_tag,uint32_t initial_tsn,uint32_t vrf_id,uint16_t o_streams,uint16_t port,struct thread * p,int initialize_auth_params)4391 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4392 int *error, uint32_t override_tag, uint32_t initial_tsn,
4393 uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4394 struct thread *p,
4395 int initialize_auth_params)
4396 {
4397 struct sctp_tcb *stcb;
4398
4399 SCTP_INP_INFO_WLOCK();
4400 SCTP_INP_WLOCK(inp);
4401 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4402 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4403 SCTP_INP_INFO_WUNLOCK();
4404 SCTP_INP_WUNLOCK(inp);
4405 return (stcb);
4406 }
4407
4408 struct sctp_tcb *
sctp_aloc_assoc_connected(struct sctp_inpcb * inp,struct sockaddr * firstaddr,int * error,uint32_t override_tag,uint32_t initial_tsn,uint32_t vrf_id,uint16_t o_streams,uint16_t port,struct thread * p,int initialize_auth_params)4409 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4410 int *error, uint32_t override_tag, uint32_t initial_tsn,
4411 uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4412 struct thread *p,
4413 int initialize_auth_params)
4414 {
4415 struct sctp_tcb *stcb;
4416
4417 SCTP_INP_INFO_WLOCK();
4418 SCTP_INP_WLOCK(inp);
4419 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4420 SCTP_IS_LISTENING(inp)) {
4421 SCTP_INP_INFO_WUNLOCK();
4422 SCTP_INP_WUNLOCK(inp);
4423 *error = EINVAL;
4424 return (NULL);
4425 }
4426 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4427 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4428 SCTP_INP_INFO_WUNLOCK();
4429 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4430 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
4431 soisconnecting(inp->sctp_socket);
4432 }
4433 SCTP_INP_WUNLOCK(inp);
4434 return (stcb);
4435 }
4436
4437 void
sctp_remove_net(struct sctp_tcb * stcb,struct sctp_nets * net)4438 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4439 {
4440 struct sctp_inpcb *inp;
4441 struct sctp_association *asoc;
4442
4443 inp = stcb->sctp_ep;
4444 asoc = &stcb->asoc;
4445 asoc->numnets--;
4446 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4447 if (net == asoc->primary_destination) {
4448 /* Reset primary */
4449 struct sctp_nets *lnet;
4450
4451 lnet = TAILQ_FIRST(&asoc->nets);
4452 /*
4453 * Mobility adaptation Ideally, if deleted destination is
4454 * the primary, it becomes a fast retransmission trigger by
4455 * the subsequent SET PRIMARY. (by micchie)
4456 */
4457 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4458 SCTP_MOBILITY_BASE) ||
4459 sctp_is_mobility_feature_on(stcb->sctp_ep,
4460 SCTP_MOBILITY_FASTHANDOFF)) {
4461 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4462 if (asoc->deleted_primary != NULL) {
4463 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4464 goto out;
4465 }
4466 asoc->deleted_primary = net;
4467 atomic_add_int(&net->ref_count, 1);
4468 memset(&net->lastsa, 0, sizeof(net->lastsa));
4469 memset(&net->lastsv, 0, sizeof(net->lastsv));
4470 sctp_mobility_feature_on(stcb->sctp_ep,
4471 SCTP_MOBILITY_PRIM_DELETED);
4472 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4473 stcb->sctp_ep, stcb, NULL);
4474 }
4475 out:
4476 /* Try to find a confirmed primary */
4477 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4478 }
4479 if (net == asoc->last_data_chunk_from) {
4480 /* Reset primary */
4481 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4482 }
4483 if (net == asoc->last_control_chunk_from) {
4484 /* Clear net */
4485 asoc->last_control_chunk_from = NULL;
4486 }
4487 if (net == asoc->last_net_cmt_send_started) {
4488 /* Clear net */
4489 asoc->last_net_cmt_send_started = NULL;
4490 }
4491 if (net == stcb->asoc.alternate) {
4492 sctp_free_remote_addr(stcb->asoc.alternate);
4493 stcb->asoc.alternate = NULL;
4494 }
4495 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4496 SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4497 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4498 SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4499 net->dest_state |= SCTP_ADDR_BEING_DELETED;
4500 sctp_free_remote_addr(net);
4501 }
4502
4503 /*
4504 * remove a remote endpoint address from an association, it will fail if the
4505 * address does not exist.
4506 */
4507 int
sctp_del_remote_addr(struct sctp_tcb * stcb,struct sockaddr * remaddr)4508 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4509 {
4510 /*
4511 * Here we need to remove a remote address. This is quite simple, we
4512 * first find it in the list of address for the association
4513 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4514 * on that item. Note we do not allow it to be removed if there are
4515 * no other addresses.
4516 */
4517 struct sctp_association *asoc;
4518 struct sctp_nets *net, *nnet;
4519
4520 asoc = &stcb->asoc;
4521
4522 /* locate the address */
4523 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4524 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4525 continue;
4526 }
4527 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4528 remaddr)) {
4529 /* we found the guy */
4530 if (asoc->numnets < 2) {
4531 /* Must have at LEAST two remote addresses */
4532 return (-1);
4533 } else {
4534 sctp_remove_net(stcb, net);
4535 return (0);
4536 }
4537 }
4538 }
4539 /* not found. */
4540 return (-2);
4541 }
4542
4543 static bool
sctp_is_in_timewait(uint32_t tag,uint16_t lport,uint16_t rport,time_t now)4544 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, time_t now)
4545 {
4546 struct sctpvtaghead *chain;
4547 struct sctp_tagblock *twait_block;
4548 int i;
4549
4550 SCTP_INP_INFO_LOCK_ASSERT();
4551 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4552 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4553 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4554 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) &&
4555 (twait_block->vtag_block[i].v_tag == tag) &&
4556 (twait_block->vtag_block[i].lport == lport) &&
4557 (twait_block->vtag_block[i].rport == rport)) {
4558 return (true);
4559 }
4560 }
4561 }
4562 return (false);
4563 }
4564
4565 static void
sctp_set_vtag_block(struct sctp_timewait * vtag_block,time_t time,uint32_t tag,uint16_t lport,uint16_t rport)4566 sctp_set_vtag_block(struct sctp_timewait *vtag_block, time_t time,
4567 uint32_t tag, uint16_t lport, uint16_t rport)
4568 {
4569 vtag_block->tv_sec_at_expire = time;
4570 vtag_block->v_tag = tag;
4571 vtag_block->lport = lport;
4572 vtag_block->rport = rport;
4573 }
4574
4575 static void
sctp_add_vtag_to_timewait(uint32_t tag,uint16_t lport,uint16_t rport)4576 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4577 {
4578 struct sctpvtaghead *chain;
4579 struct sctp_tagblock *twait_block;
4580 struct timeval now;
4581 time_t time;
4582 int i;
4583 bool set;
4584
4585 SCTP_INP_INFO_WLOCK_ASSERT();
4586 (void)SCTP_GETTIME_TIMEVAL(&now);
4587 time = now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait);
4588 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4589 set = false;
4590 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4591 /* Block(s) present, lets find space, and expire on the fly */
4592 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4593 if ((twait_block->vtag_block[i].v_tag == 0) && !set) {
4594 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4595 set = true;
4596 continue;
4597 }
4598 if ((twait_block->vtag_block[i].v_tag != 0) &&
4599 (twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4600 if (set) {
4601 /* Audit expires this guy */
4602 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0);
4603 } else {
4604 /* Reuse it for the new tag */
4605 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4606 set = true;
4607 }
4608 }
4609 }
4610 if (set) {
4611 /*
4612 * We only do up to the block where we can place our
4613 * tag for audits
4614 */
4615 break;
4616 }
4617 }
4618 /* Need to add a new block to chain */
4619 if (!set) {
4620 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4621 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4622 if (twait_block == NULL) {
4623 return;
4624 }
4625 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4626 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4627 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport);
4628 }
4629 }
4630
4631 void
sctp_clean_up_stream(struct sctp_tcb * stcb,struct sctp_readhead * rh)4632 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4633 {
4634 struct sctp_tmit_chunk *chk, *nchk;
4635 struct sctp_queued_to_read *control, *ncontrol;
4636
4637 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4638 TAILQ_REMOVE(rh, control, next_instrm);
4639 control->on_strm_q = 0;
4640 if (control->on_read_q == 0) {
4641 sctp_free_remote_addr(control->whoFrom);
4642 if (control->data) {
4643 sctp_m_freem(control->data);
4644 control->data = NULL;
4645 }
4646 }
4647 /* Reassembly free? */
4648 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4649 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4650 if (chk->data) {
4651 sctp_m_freem(chk->data);
4652 chk->data = NULL;
4653 }
4654 if (chk->holds_key_ref)
4655 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4656 sctp_free_remote_addr(chk->whoTo);
4657 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4658 SCTP_DECR_CHK_COUNT();
4659 /* sa_ignore FREED_MEMORY */
4660 }
4661 /*
4662 * We don't free the address here since all the net's were
4663 * freed above.
4664 */
4665 if (control->on_read_q == 0) {
4666 sctp_free_a_readq(stcb, control);
4667 }
4668 }
4669 }
4670
4671 /*-
4672 * Free the association after un-hashing the remote port. This
4673 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4674 * expect that the input to this function IS a locked TCB.
4675 * It will return 0, if it did NOT destroy the association (instead
4676 * it unlocks it. It will return NON-zero if it either destroyed the
4677 * association OR the association is already destroyed.
4678 */
4679 int
sctp_free_assoc(struct sctp_inpcb * inp,struct sctp_tcb * stcb,int from_inpcbfree,int from_location)4680 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4681 {
4682 int i;
4683 struct sctp_association *asoc;
4684 struct sctp_nets *net, *nnet;
4685 struct sctp_laddr *laddr, *naddr;
4686 struct sctp_tmit_chunk *chk, *nchk;
4687 struct sctp_asconf_addr *aparam, *naparam;
4688 struct sctp_asconf_ack *aack, *naack;
4689 struct sctp_stream_reset_list *strrst, *nstrrst;
4690 struct sctp_queued_to_read *sq, *nsq;
4691 struct sctp_stream_queue_pending *sp, *nsp;
4692 sctp_sharedkey_t *shared_key, *nshared_key;
4693 struct socket *so;
4694
4695 /* first, lets purge the entry from the hash table. */
4696 SCTP_TCB_LOCK_ASSERT(stcb);
4697
4698 #ifdef SCTP_LOG_CLOSING
4699 sctp_log_closing(inp, stcb, 6);
4700 #endif
4701 if (stcb->asoc.state == 0) {
4702 #ifdef SCTP_LOG_CLOSING
4703 sctp_log_closing(inp, NULL, 7);
4704 #endif
4705 /* there is no asoc, really TSNH :-0 */
4706 return (1);
4707 }
4708 if (stcb->asoc.alternate) {
4709 sctp_free_remote_addr(stcb->asoc.alternate);
4710 stcb->asoc.alternate = NULL;
4711 }
4712 /* TEMP CODE */
4713 if (stcb->freed_from_where == 0) {
4714 /* Only record the first place free happened from */
4715 stcb->freed_from_where = from_location;
4716 }
4717 /* TEMP CODE */
4718
4719 asoc = &stcb->asoc;
4720 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4721 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4722 /* nothing around */
4723 so = NULL;
4724 else
4725 so = inp->sctp_socket;
4726
4727 /*
4728 * We used timer based freeing if a reader or writer is in the way.
4729 * So we first check if we are actually being called from a timer,
4730 * if so we abort early if a reader or writer is still in the way.
4731 */
4732 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4733 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4734 /*
4735 * is it the timer driving us? if so are the reader/writers
4736 * gone?
4737 */
4738 if (stcb->asoc.refcnt) {
4739 /* nope, reader or writer in the way */
4740 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4741 /* no asoc destroyed */
4742 SCTP_TCB_UNLOCK(stcb);
4743 #ifdef SCTP_LOG_CLOSING
4744 sctp_log_closing(inp, stcb, 8);
4745 #endif
4746 return (0);
4747 }
4748 }
4749 /* Now clean up any other timers */
4750 sctp_stop_association_timers(stcb, false);
4751 /* Now the read queue needs to be cleaned up (only once) */
4752 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4753 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4754 SCTP_INP_READ_LOCK(inp);
4755 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4756 if (sq->stcb == stcb) {
4757 sq->do_not_ref_stcb = 1;
4758 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4759 /*
4760 * If there is no end, there never will be
4761 * now.
4762 */
4763 if (sq->end_added == 0) {
4764 /* Held for PD-API, clear that. */
4765 sq->pdapi_aborted = 1;
4766 sq->held_length = 0;
4767 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4768 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4769 stcb,
4770 SCTP_PARTIAL_DELIVERY_ABORTED,
4771 (void *)sq,
4772 SCTP_SO_LOCKED);
4773 }
4774 /* Add an end to wake them */
4775 sq->end_added = 1;
4776 }
4777 }
4778 }
4779 SCTP_INP_READ_UNLOCK(inp);
4780 if (stcb->block_entry) {
4781 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4782 stcb->block_entry->error = ECONNRESET;
4783 stcb->block_entry = NULL;
4784 }
4785 }
4786 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4787 /*
4788 * Someone holds a reference OR the socket is unaccepted
4789 * yet.
4790 */
4791 if ((stcb->asoc.refcnt) ||
4792 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4793 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4794 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4795 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4796 }
4797 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4798 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4799 /* nothing around */
4800 so = NULL;
4801 if (so) {
4802 /* Wake any reader/writers */
4803 sctp_sorwakeup(inp, so);
4804 sctp_sowwakeup(inp, so);
4805 }
4806 SCTP_TCB_UNLOCK(stcb);
4807
4808 #ifdef SCTP_LOG_CLOSING
4809 sctp_log_closing(inp, stcb, 9);
4810 #endif
4811 /* no asoc destroyed */
4812 return (0);
4813 }
4814 #ifdef SCTP_LOG_CLOSING
4815 sctp_log_closing(inp, stcb, 10);
4816 #endif
4817 /*
4818 * When I reach here, no others want to kill the assoc yet.. and I
4819 * own the lock. Now its possible an abort comes in when I do the
4820 * lock exchange below to grab all the locks to do the final take
4821 * out. to prevent this we increment the count, which will start a
4822 * timer and blow out above thus assuring us that we hold exclusive
4823 * killing of the asoc. Note that after getting back the TCB lock we
4824 * will go ahead and increment the counter back up and stop any
4825 * timer a passing stranger may have started :-S
4826 */
4827 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4828 atomic_add_int(&stcb->asoc.refcnt, 1);
4829
4830 SCTP_TCB_UNLOCK(stcb);
4831 SCTP_INP_INFO_WLOCK();
4832 SCTP_INP_WLOCK(inp);
4833 SCTP_TCB_LOCK(stcb);
4834 }
4835 /* Double check the GONE flag */
4836 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4837 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4838 /* nothing around */
4839 so = NULL;
4840
4841 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4842 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4843 /*
4844 * For TCP type we need special handling when we are
4845 * connected. We also include the peel'ed off ones to.
4846 */
4847 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4848 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4849 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4850 if (so) {
4851 SOCKBUF_LOCK(&so->so_rcv);
4852 so->so_state &= ~(SS_ISCONNECTING |
4853 SS_ISDISCONNECTING |
4854 SS_ISCONNECTED);
4855 so->so_state |= SS_ISDISCONNECTED;
4856 socantrcvmore_locked(so);
4857 socantsendmore(so);
4858 sctp_sowwakeup(inp, so);
4859 sctp_sorwakeup(inp, so);
4860 SCTP_SOWAKEUP(so);
4861 }
4862 }
4863 }
4864
4865 /*
4866 * Make it invalid too, that way if its about to run it will abort
4867 * and return.
4868 */
4869 /* re-increment the lock */
4870 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4871 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4872 }
4873 if (stcb->asoc.refcnt) {
4874 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4875 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4876 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4877 SCTP_INP_INFO_WUNLOCK();
4878 SCTP_INP_WUNLOCK(inp);
4879 }
4880 SCTP_TCB_UNLOCK(stcb);
4881 return (0);
4882 }
4883 asoc->state = 0;
4884 if (inp->sctp_tcbhash) {
4885 LIST_REMOVE(stcb, sctp_tcbhash);
4886 }
4887 if (stcb->asoc.in_asocid_hash) {
4888 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4889 }
4890 if (inp->sctp_socket == NULL) {
4891 stcb->sctp_socket = NULL;
4892 }
4893 /* Now lets remove it from the list of ALL associations in the EP */
4894 LIST_REMOVE(stcb, sctp_tcblist);
4895 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4896 SCTP_INP_INCR_REF(inp);
4897 SCTP_INP_WUNLOCK(inp);
4898 }
4899 /* pull from vtag hash */
4900 LIST_REMOVE(stcb, sctp_asocs);
4901 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport);
4902
4903 /*
4904 * Now restop the timers to be sure this is paranoia at is finest!
4905 */
4906 sctp_stop_association_timers(stcb, true);
4907
4908 /*
4909 * The chunk lists and such SHOULD be empty but we check them just
4910 * in case.
4911 */
4912 /* anything on the wheel needs to be removed */
4913 for (i = 0; i < asoc->streamoutcnt; i++) {
4914 struct sctp_stream_out *outs;
4915
4916 outs = &asoc->strmout[i];
4917 /* now clean up any chunks here */
4918 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4919 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4920 TAILQ_REMOVE(&outs->outqueue, sp, next);
4921 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
4922 sctp_free_spbufspace(stcb, asoc, sp);
4923 if (sp->data) {
4924 if (so) {
4925 /* Still an open socket - report */
4926 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4927 0, (void *)sp, SCTP_SO_LOCKED);
4928 }
4929 if (sp->data) {
4930 sctp_m_freem(sp->data);
4931 sp->data = NULL;
4932 sp->tail_mbuf = NULL;
4933 sp->length = 0;
4934 }
4935 }
4936 if (sp->net) {
4937 sctp_free_remote_addr(sp->net);
4938 sp->net = NULL;
4939 }
4940 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4941 }
4942 }
4943 /* sa_ignore FREED_MEMORY */
4944 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4945 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4946 SCTP_FREE(strrst, SCTP_M_STRESET);
4947 }
4948 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4949 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4950 if (sq->data) {
4951 sctp_m_freem(sq->data);
4952 sq->data = NULL;
4953 }
4954 sctp_free_remote_addr(sq->whoFrom);
4955 sq->whoFrom = NULL;
4956 sq->stcb = NULL;
4957 /* Free the ctl entry */
4958 sctp_free_a_readq(stcb, sq);
4959 /* sa_ignore FREED_MEMORY */
4960 }
4961 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4962 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4963 if (chk->data) {
4964 sctp_m_freem(chk->data);
4965 chk->data = NULL;
4966 }
4967 if (chk->holds_key_ref)
4968 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4969 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4970 SCTP_DECR_CHK_COUNT();
4971 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4972 asoc->free_chunk_cnt--;
4973 /* sa_ignore FREED_MEMORY */
4974 }
4975 /* pending send queue SHOULD be empty */
4976 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4977 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4978 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4979 #ifdef INVARIANTS
4980 } else {
4981 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
4982 #endif
4983 }
4984 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4985 if (chk->data) {
4986 if (so) {
4987 /* Still a socket? */
4988 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4989 0, chk, SCTP_SO_LOCKED);
4990 }
4991 if (chk->data) {
4992 sctp_m_freem(chk->data);
4993 chk->data = NULL;
4994 }
4995 }
4996 if (chk->holds_key_ref)
4997 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4998 if (chk->whoTo) {
4999 sctp_free_remote_addr(chk->whoTo);
5000 chk->whoTo = NULL;
5001 }
5002 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5003 SCTP_DECR_CHK_COUNT();
5004 /* sa_ignore FREED_MEMORY */
5005 }
5006 /* sent queue SHOULD be empty */
5007 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5008 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5009 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5010 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5011 #ifdef INVARIANTS
5012 } else {
5013 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5014 #endif
5015 }
5016 }
5017 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5018 if (chk->data) {
5019 if (so) {
5020 /* Still a socket? */
5021 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5022 0, chk, SCTP_SO_LOCKED);
5023 }
5024 if (chk->data) {
5025 sctp_m_freem(chk->data);
5026 chk->data = NULL;
5027 }
5028 }
5029 if (chk->holds_key_ref)
5030 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5031 sctp_free_remote_addr(chk->whoTo);
5032 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5033 SCTP_DECR_CHK_COUNT();
5034 /* sa_ignore FREED_MEMORY */
5035 }
5036 #ifdef INVARIANTS
5037 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5038 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5039 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5040 }
5041 }
5042 #endif
5043 /* control queue MAY not be empty */
5044 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5045 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5046 if (chk->data) {
5047 sctp_m_freem(chk->data);
5048 chk->data = NULL;
5049 }
5050 if (chk->holds_key_ref)
5051 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5052 sctp_free_remote_addr(chk->whoTo);
5053 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5054 SCTP_DECR_CHK_COUNT();
5055 /* sa_ignore FREED_MEMORY */
5056 }
5057 /* ASCONF queue MAY not be empty */
5058 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5059 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5060 if (chk->data) {
5061 sctp_m_freem(chk->data);
5062 chk->data = NULL;
5063 }
5064 if (chk->holds_key_ref)
5065 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5066 sctp_free_remote_addr(chk->whoTo);
5067 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5068 SCTP_DECR_CHK_COUNT();
5069 /* sa_ignore FREED_MEMORY */
5070 }
5071 if (asoc->mapping_array) {
5072 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5073 asoc->mapping_array = NULL;
5074 }
5075 if (asoc->nr_mapping_array) {
5076 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5077 asoc->nr_mapping_array = NULL;
5078 }
5079 /* the stream outs */
5080 if (asoc->strmout) {
5081 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5082 asoc->strmout = NULL;
5083 }
5084 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5085 if (asoc->strmin) {
5086 for (i = 0; i < asoc->streamincnt; i++) {
5087 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5088 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5089 }
5090 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5091 asoc->strmin = NULL;
5092 }
5093 asoc->streamincnt = 0;
5094 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5095 #ifdef INVARIANTS
5096 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5097 panic("no net's left alloc'ed, or list points to itself");
5098 }
5099 #endif
5100 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5101 sctp_free_remote_addr(net);
5102 }
5103 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5104 /* sa_ignore FREED_MEMORY */
5105 sctp_remove_laddr(laddr);
5106 }
5107
5108 /* pending asconf (address) parameters */
5109 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5110 /* sa_ignore FREED_MEMORY */
5111 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5112 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5113 }
5114 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5115 /* sa_ignore FREED_MEMORY */
5116 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5117 if (aack->data != NULL) {
5118 sctp_m_freem(aack->data);
5119 }
5120 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5121 }
5122 /* clean up auth stuff */
5123 if (asoc->local_hmacs)
5124 sctp_free_hmaclist(asoc->local_hmacs);
5125 if (asoc->peer_hmacs)
5126 sctp_free_hmaclist(asoc->peer_hmacs);
5127
5128 if (asoc->local_auth_chunks)
5129 sctp_free_chunklist(asoc->local_auth_chunks);
5130 if (asoc->peer_auth_chunks)
5131 sctp_free_chunklist(asoc->peer_auth_chunks);
5132
5133 sctp_free_authinfo(&asoc->authinfo);
5134
5135 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5136 LIST_REMOVE(shared_key, next);
5137 sctp_free_sharedkey(shared_key);
5138 /* sa_ignore FREED_MEMORY */
5139 }
5140
5141 /* Insert new items here :> */
5142
5143 /* Get rid of LOCK */
5144 SCTP_TCB_UNLOCK(stcb);
5145 SCTP_TCB_LOCK_DESTROY(stcb);
5146 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5147 SCTP_INP_INFO_WUNLOCK();
5148 SCTP_INP_RLOCK(inp);
5149 }
5150 #ifdef SCTP_TRACK_FREED_ASOCS
5151 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5152 /* now clean up the tasoc itself */
5153 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5154 SCTP_DECR_ASOC_COUNT();
5155 } else {
5156 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5157 }
5158 #else
5159 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5160 SCTP_DECR_ASOC_COUNT();
5161 #endif
5162 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5163 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5164 /*
5165 * If its NOT the inp_free calling us AND sctp_close
5166 * as been called, we call back...
5167 */
5168 SCTP_INP_RUNLOCK(inp);
5169 /*
5170 * This will start the kill timer (if we are the
5171 * last one) since we hold an increment yet. But
5172 * this is the only safe way to do this since
5173 * otherwise if the socket closes at the same time
5174 * we are here we might collide in the cleanup.
5175 */
5176 sctp_inpcb_free(inp,
5177 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5178 SCTP_CALLED_DIRECTLY_NOCMPSET);
5179 SCTP_INP_DECR_REF(inp);
5180 } else {
5181 /* The socket is still open. */
5182 SCTP_INP_DECR_REF(inp);
5183 SCTP_INP_RUNLOCK(inp);
5184 }
5185 }
5186 /* destroyed the asoc */
5187 #ifdef SCTP_LOG_CLOSING
5188 sctp_log_closing(inp, NULL, 11);
5189 #endif
5190 return (1);
5191 }
5192
5193 /*
5194 * determine if a destination is "reachable" based upon the addresses bound
5195 * to the current endpoint (e.g. only v4 or v6 currently bound)
5196 */
5197 /*
5198 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5199 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5200 * types bound as its endpoint
5201 */
5202 int
sctp_destination_is_reachable(struct sctp_tcb * stcb,struct sockaddr * destaddr)5203 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5204 {
5205 struct sctp_inpcb *inp;
5206 int answer;
5207
5208 /*
5209 * No locks here, the TCB, in all cases is already locked and an
5210 * assoc is up. There is either a INP lock by the caller applied (in
5211 * asconf case when deleting an address) or NOT in the HB case,
5212 * however if HB then the INP increment is up and the INP will not
5213 * be removed (on top of the fact that we have a TCB lock). So we
5214 * only want to read the sctp_flags, which is either bound-all or
5215 * not.. no protection needed since once an assoc is up you can't be
5216 * changing your binding.
5217 */
5218 inp = stcb->sctp_ep;
5219 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5220 /* if bound all, destination is not restricted */
5221 /*
5222 * RRS: Question during lock work: Is this correct? If you
5223 * are bound-all you still might need to obey the V4--V6
5224 * flags??? IMO this bound-all stuff needs to be removed!
5225 */
5226 return (1);
5227 }
5228 /* NOTE: all "scope" checks are done when local addresses are added */
5229 switch (destaddr->sa_family) {
5230 #ifdef INET6
5231 case AF_INET6:
5232 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5233 break;
5234 #endif
5235 #ifdef INET
5236 case AF_INET:
5237 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5238 break;
5239 #endif
5240 default:
5241 /* invalid family, so it's unreachable */
5242 answer = 0;
5243 break;
5244 }
5245 return (answer);
5246 }
5247
5248 /*
5249 * update the inp_vflags on an endpoint
5250 */
5251 static void
sctp_update_ep_vflag(struct sctp_inpcb * inp)5252 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5253 {
5254 struct sctp_laddr *laddr;
5255
5256 /* first clear the flag */
5257 inp->ip_inp.inp.inp_vflag = 0;
5258 /* set the flag based on addresses on the ep list */
5259 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5260 if (laddr->ifa == NULL) {
5261 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5262 __func__);
5263 continue;
5264 }
5265
5266 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5267 continue;
5268 }
5269 switch (laddr->ifa->address.sa.sa_family) {
5270 #ifdef INET6
5271 case AF_INET6:
5272 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5273 break;
5274 #endif
5275 #ifdef INET
5276 case AF_INET:
5277 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5278 break;
5279 #endif
5280 default:
5281 break;
5282 }
5283 }
5284 }
5285
5286 /*
5287 * Add the address to the endpoint local address list There is nothing to be
5288 * done if we are bound to all addresses
5289 */
5290 void
sctp_add_local_addr_ep(struct sctp_inpcb * inp,struct sctp_ifa * ifa,uint32_t action)5291 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5292 {
5293 struct sctp_laddr *laddr;
5294 struct sctp_tcb *stcb;
5295 int fnd, error = 0;
5296
5297 fnd = 0;
5298
5299 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5300 /* You are already bound to all. You have it already */
5301 return;
5302 }
5303 #ifdef INET6
5304 if (ifa->address.sa.sa_family == AF_INET6) {
5305 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5306 /* Can't bind a non-useable addr. */
5307 return;
5308 }
5309 }
5310 #endif
5311 /* first, is it already present? */
5312 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5313 if (laddr->ifa == ifa) {
5314 fnd = 1;
5315 break;
5316 }
5317 }
5318
5319 if (fnd == 0) {
5320 /* Not in the ep list */
5321 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5322 if (error != 0)
5323 return;
5324 inp->laddr_count++;
5325 /* update inp_vflag flags */
5326 switch (ifa->address.sa.sa_family) {
5327 #ifdef INET6
5328 case AF_INET6:
5329 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5330 break;
5331 #endif
5332 #ifdef INET
5333 case AF_INET:
5334 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5335 break;
5336 #endif
5337 default:
5338 break;
5339 }
5340 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5341 sctp_add_local_addr_restricted(stcb, ifa);
5342 }
5343 }
5344 return;
5345 }
5346
5347 /*
5348 * select a new (hopefully reachable) destination net (should only be used
5349 * when we deleted an ep addr that is the only usable source address to reach
5350 * the destination net)
5351 */
5352 static void
sctp_select_primary_destination(struct sctp_tcb * stcb)5353 sctp_select_primary_destination(struct sctp_tcb *stcb)
5354 {
5355 struct sctp_nets *net;
5356
5357 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5358 /* for now, we'll just pick the first reachable one we find */
5359 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5360 continue;
5361 if (sctp_destination_is_reachable(stcb,
5362 (struct sockaddr *)&net->ro._l_addr)) {
5363 /* found a reachable destination */
5364 stcb->asoc.primary_destination = net;
5365 }
5366 }
5367 /* I can't there from here! ...we're gonna die shortly... */
5368 }
5369
5370 /*
5371 * Delete the address from the endpoint local address list. There is nothing
5372 * to be done if we are bound to all addresses
5373 */
5374 void
sctp_del_local_addr_ep(struct sctp_inpcb * inp,struct sctp_ifa * ifa)5375 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5376 {
5377 struct sctp_laddr *laddr;
5378 int fnd;
5379
5380 fnd = 0;
5381 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5382 /* You are already bound to all. You have it already */
5383 return;
5384 }
5385 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5386 if (laddr->ifa == ifa) {
5387 fnd = 1;
5388 break;
5389 }
5390 }
5391 if (fnd && (inp->laddr_count < 2)) {
5392 /* can't delete unless there are at LEAST 2 addresses */
5393 return;
5394 }
5395 if (fnd) {
5396 /*
5397 * clean up any use of this address go through our
5398 * associations and clear any last_used_address that match
5399 * this one for each assoc, see if a new primary_destination
5400 * is needed
5401 */
5402 struct sctp_tcb *stcb;
5403
5404 /* clean up "next_addr_touse" */
5405 if (inp->next_addr_touse == laddr)
5406 /* delete this address */
5407 inp->next_addr_touse = NULL;
5408
5409 /* clean up "last_used_address" */
5410 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5411 struct sctp_nets *net;
5412
5413 SCTP_TCB_LOCK(stcb);
5414 if (stcb->asoc.last_used_address == laddr)
5415 /* delete this address */
5416 stcb->asoc.last_used_address = NULL;
5417 /*
5418 * Now spin through all the nets and purge any ref
5419 * to laddr
5420 */
5421 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5422 if (net->ro._s_addr == laddr->ifa) {
5423 /* Yep, purge src address selected */
5424 RO_NHFREE(&net->ro);
5425 sctp_free_ifa(net->ro._s_addr);
5426 net->ro._s_addr = NULL;
5427 net->src_addr_selected = 0;
5428 }
5429 }
5430 SCTP_TCB_UNLOCK(stcb);
5431 } /* for each tcb */
5432 /* remove it from the ep list */
5433 sctp_remove_laddr(laddr);
5434 inp->laddr_count--;
5435 /* update inp_vflag flags */
5436 sctp_update_ep_vflag(inp);
5437 }
5438 return;
5439 }
5440
5441 /*
5442 * Add the address to the TCB local address restricted list.
5443 * This is a "pending" address list (eg. addresses waiting for an
5444 * ASCONF-ACK response) and cannot be used as a valid source address.
5445 */
5446 void
sctp_add_local_addr_restricted(struct sctp_tcb * stcb,struct sctp_ifa * ifa)5447 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5448 {
5449 struct sctp_laddr *laddr;
5450 struct sctpladdr *list;
5451
5452 /*
5453 * Assumes TCB is locked.. and possibly the INP. May need to
5454 * confirm/fix that if we need it and is not the case.
5455 */
5456 list = &stcb->asoc.sctp_restricted_addrs;
5457
5458 #ifdef INET6
5459 if (ifa->address.sa.sa_family == AF_INET6) {
5460 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5461 /* Can't bind a non-existent addr. */
5462 return;
5463 }
5464 }
5465 #endif
5466 /* does the address already exist? */
5467 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5468 if (laddr->ifa == ifa) {
5469 return;
5470 }
5471 }
5472
5473 /* add to the list */
5474 (void)sctp_insert_laddr(list, ifa, 0);
5475 return;
5476 }
5477
5478 /*
5479 * Remove a local address from the TCB local address restricted list
5480 */
5481 void
sctp_del_local_addr_restricted(struct sctp_tcb * stcb,struct sctp_ifa * ifa)5482 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5483 {
5484 struct sctp_inpcb *inp;
5485 struct sctp_laddr *laddr;
5486
5487 /*
5488 * This is called by asconf work. It is assumed that a) The TCB is
5489 * locked and b) The INP is locked. This is true in as much as I can
5490 * trace through the entry asconf code where I did these locks.
5491 * Again, the ASCONF code is a bit different in that it does lock
5492 * the INP during its work often times. This must be since we don't
5493 * want other proc's looking up things while what they are looking
5494 * up is changing :-D
5495 */
5496
5497 inp = stcb->sctp_ep;
5498 /* if subset bound and don't allow ASCONF's, can't delete last */
5499 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5500 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5501 if (stcb->sctp_ep->laddr_count < 2) {
5502 /* can't delete last address */
5503 return;
5504 }
5505 }
5506 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5507 /* remove the address if it exists */
5508 if (laddr->ifa == NULL)
5509 continue;
5510 if (laddr->ifa == ifa) {
5511 sctp_remove_laddr(laddr);
5512 return;
5513 }
5514 }
5515
5516 /* address not found! */
5517 return;
5518 }
5519
5520 /* sysctl */
5521 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5522 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5523
5524 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5525 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5526 int *sctp_cpuarry = NULL;
5527
5528 void
sctp_queue_to_mcore(struct mbuf * m,int off,int cpu_to_use)5529 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5530 {
5531 /* Queue a packet to a processor for the specified core */
5532 struct sctp_mcore_queue *qent;
5533 struct sctp_mcore_ctrl *wkq;
5534 int need_wake = 0;
5535
5536 if (sctp_mcore_workers == NULL) {
5537 /* Something went way bad during setup */
5538 sctp_input_with_port(m, off, 0);
5539 return;
5540 }
5541 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5542 (sizeof(struct sctp_mcore_queue)),
5543 SCTP_M_MCORE);
5544 if (qent == NULL) {
5545 /* This is trouble */
5546 sctp_input_with_port(m, off, 0);
5547 return;
5548 }
5549 qent->vn = curvnet;
5550 qent->m = m;
5551 qent->off = off;
5552 qent->v6 = 0;
5553 wkq = &sctp_mcore_workers[cpu_to_use];
5554 SCTP_MCORE_QLOCK(wkq);
5555
5556 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5557 if (wkq->running == 0) {
5558 need_wake = 1;
5559 }
5560 SCTP_MCORE_QUNLOCK(wkq);
5561 if (need_wake) {
5562 wakeup(&wkq->running);
5563 }
5564 }
5565
5566 static void
sctp_mcore_thread(void * arg)5567 sctp_mcore_thread(void *arg)
5568 {
5569
5570 struct sctp_mcore_ctrl *wkq;
5571 struct sctp_mcore_queue *qent;
5572
5573 wkq = (struct sctp_mcore_ctrl *)arg;
5574 struct mbuf *m;
5575 int off, v6;
5576
5577 /* Wait for first tickle */
5578 SCTP_MCORE_LOCK(wkq);
5579 wkq->running = 0;
5580 msleep(&wkq->running,
5581 &wkq->core_mtx,
5582 0, "wait for pkt", 0);
5583 SCTP_MCORE_UNLOCK(wkq);
5584
5585 /* Bind to our cpu */
5586 thread_lock(curthread);
5587 sched_bind(curthread, wkq->cpuid);
5588 thread_unlock(curthread);
5589
5590 /* Now lets start working */
5591 SCTP_MCORE_LOCK(wkq);
5592 /* Now grab lock and go */
5593 for (;;) {
5594 SCTP_MCORE_QLOCK(wkq);
5595 skip_sleep:
5596 wkq->running = 1;
5597 qent = TAILQ_FIRST(&wkq->que);
5598 if (qent) {
5599 TAILQ_REMOVE(&wkq->que, qent, next);
5600 SCTP_MCORE_QUNLOCK(wkq);
5601 CURVNET_SET(qent->vn);
5602 m = qent->m;
5603 off = qent->off;
5604 v6 = qent->v6;
5605 SCTP_FREE(qent, SCTP_M_MCORE);
5606 if (v6 == 0) {
5607 sctp_input_with_port(m, off, 0);
5608 } else {
5609 SCTP_PRINTF("V6 not yet supported\n");
5610 sctp_m_freem(m);
5611 }
5612 CURVNET_RESTORE();
5613 SCTP_MCORE_QLOCK(wkq);
5614 }
5615 wkq->running = 0;
5616 if (!TAILQ_EMPTY(&wkq->que)) {
5617 goto skip_sleep;
5618 }
5619 SCTP_MCORE_QUNLOCK(wkq);
5620 msleep(&wkq->running,
5621 &wkq->core_mtx,
5622 0, "wait for pkt", 0);
5623 }
5624 }
5625
5626 static void
sctp_startup_mcore_threads(void)5627 sctp_startup_mcore_threads(void)
5628 {
5629 int i, cpu;
5630
5631 if (mp_ncpus == 1)
5632 return;
5633
5634 if (sctp_mcore_workers != NULL) {
5635 /*
5636 * Already been here in some previous vnet?
5637 */
5638 return;
5639 }
5640 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5641 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5642 SCTP_M_MCORE);
5643 if (sctp_mcore_workers == NULL) {
5644 /* TSNH I hope */
5645 return;
5646 }
5647 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5648 sizeof(struct sctp_mcore_ctrl)));
5649 /* Init the structures */
5650 for (i = 0; i <= mp_maxid; i++) {
5651 TAILQ_INIT(&sctp_mcore_workers[i].que);
5652 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5653 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5654 sctp_mcore_workers[i].cpuid = i;
5655 }
5656 if (sctp_cpuarry == NULL) {
5657 SCTP_MALLOC(sctp_cpuarry, int *,
5658 (mp_ncpus * sizeof(int)),
5659 SCTP_M_MCORE);
5660 i = 0;
5661 CPU_FOREACH(cpu) {
5662 sctp_cpuarry[i] = cpu;
5663 i++;
5664 }
5665 }
5666 /* Now start them all */
5667 CPU_FOREACH(cpu) {
5668 (void)kproc_create(sctp_mcore_thread,
5669 (void *)&sctp_mcore_workers[cpu],
5670 &sctp_mcore_workers[cpu].thread_proc,
5671 0,
5672 SCTP_KTHREAD_PAGES,
5673 SCTP_MCORE_NAME);
5674 }
5675 }
5676 #endif
5677
5678 #define VALIDATE_LOADER_TUNABLE(var_name, prefix) \
5679 if (SCTP_BASE_SYSCTL(var_name) < prefix##_MIN || \
5680 SCTP_BASE_SYSCTL(var_name) > prefix##_MAX) \
5681 SCTP_BASE_SYSCTL(var_name) = prefix##_DEFAULT
5682
5683 void
sctp_pcb_init(void)5684 sctp_pcb_init(void)
5685 {
5686 /*
5687 * SCTP initialization for the PCB structures should be called by
5688 * the sctp_init() function.
5689 */
5690 int i;
5691 struct timeval tv;
5692
5693 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5694 /* error I was called twice */
5695 return;
5696 }
5697 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5698
5699 #if defined(SCTP_LOCAL_TRACE_BUF)
5700 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5701 #endif
5702 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5703 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5704 ((mp_maxid + 1) * sizeof(struct sctpstat)),
5705 SCTP_M_MCORE);
5706 #endif
5707 (void)SCTP_GETTIME_TIMEVAL(&tv);
5708 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5709 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5710 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5711 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5712 #else
5713 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5714 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5715 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5716 #endif
5717 /* init the empty list of (All) Endpoints */
5718 LIST_INIT(&SCTP_BASE_INFO(listhead));
5719
5720 /* init the hash table of endpoints */
5721 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5722 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5723 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5724 VALIDATE_LOADER_TUNABLE(sctp_hashtblsize, SCTPCTL_TCBHASHSIZE);
5725 VALIDATE_LOADER_TUNABLE(sctp_pcbtblsize, SCTPCTL_PCBHASHSIZE);
5726 VALIDATE_LOADER_TUNABLE(sctp_chunkscale, SCTPCTL_CHUNKSCALE);
5727 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5728 &SCTP_BASE_INFO(hashasocmark));
5729 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5730 &SCTP_BASE_INFO(hashmark));
5731 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5732 &SCTP_BASE_INFO(hashtcpmark));
5733 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5734 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5735 &SCTP_BASE_INFO(hashvrfmark));
5736
5737 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5738 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5739 /* init the zones */
5740 /*
5741 * FIX ME: Should check for NULL returns, but if it does fail we are
5742 * doomed to panic anyways... add later maybe.
5743 */
5744 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5745 sizeof(struct sctp_inpcb), maxsockets);
5746
5747 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5748 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5749
5750 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5751 sizeof(struct sctp_laddr),
5752 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5753
5754 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5755 sizeof(struct sctp_nets),
5756 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5757
5758 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5759 sizeof(struct sctp_tmit_chunk),
5760 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5761
5762 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5763 sizeof(struct sctp_queued_to_read),
5764 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5765
5766 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5767 sizeof(struct sctp_stream_queue_pending),
5768 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5769
5770 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5771 sizeof(struct sctp_asconf),
5772 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5773
5774 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5775 sizeof(struct sctp_asconf_ack),
5776 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5777
5778 /* Master Lock INIT for info structure */
5779 SCTP_INP_INFO_LOCK_INIT();
5780 SCTP_STATLOG_INIT_LOCK();
5781
5782 SCTP_IPI_COUNT_INIT();
5783 SCTP_IPI_ADDR_INIT();
5784 #ifdef SCTP_PACKET_LOGGING
5785 SCTP_IP_PKTLOG_INIT();
5786 #endif
5787 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5788
5789 SCTP_WQ_ADDR_INIT();
5790 /* not sure if we need all the counts */
5791 SCTP_BASE_INFO(ipi_count_ep) = 0;
5792 /* assoc/tcb zone info */
5793 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5794 /* local addrlist zone info */
5795 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5796 /* remote addrlist zone info */
5797 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5798 /* chunk info */
5799 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5800
5801 /* socket queue zone info */
5802 SCTP_BASE_INFO(ipi_count_readq) = 0;
5803
5804 /* stream out queue cont */
5805 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5806
5807 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5808 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5809
5810 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5811
5812 /* Init the TIMEWAIT list */
5813 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5814 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5815 }
5816 sctp_startup_iterator();
5817
5818 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5819 sctp_startup_mcore_threads();
5820 #endif
5821
5822 /*
5823 * INIT the default VRF which for BSD is the only one, other O/S's
5824 * may have more. But initially they must start with one and then
5825 * add the VRF's as addresses are added.
5826 */
5827 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5828 }
5829
5830 /*
5831 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5832 */
5833 void
sctp_pcb_finish(void)5834 sctp_pcb_finish(void)
5835 {
5836 struct sctp_vrflist *vrf_bucket;
5837 struct sctp_vrf *vrf, *nvrf;
5838 struct sctp_ifn *ifn, *nifn;
5839 struct sctp_ifa *ifa, *nifa;
5840 struct sctpvtaghead *chain;
5841 struct sctp_tagblock *twait_block, *prev_twait_block;
5842 struct sctp_laddr *wi, *nwi;
5843 int i;
5844 struct sctp_iterator *it, *nit;
5845
5846 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5847 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5848 return;
5849 }
5850 SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5851 /*
5852 * In FreeBSD the iterator thread never exits but we do clean up.
5853 * The only way FreeBSD reaches here is if we have VRF's but we
5854 * still add the ifdef to make it compile on old versions.
5855 */
5856 retry:
5857 SCTP_IPI_ITERATOR_WQ_LOCK();
5858 /*
5859 * sctp_iterator_worker() might be working on an it entry without
5860 * holding the lock. We won't find it on the list either and
5861 * continue and free/destroy it. While holding the lock, spin, to
5862 * avoid the race condition as sctp_iterator_worker() will have to
5863 * wait to re-acquire the lock.
5864 */
5865 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5866 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5867 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5868 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5869 DELAY(10);
5870 goto retry;
5871 }
5872 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5873 if (it->vn != curvnet) {
5874 continue;
5875 }
5876 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5877 if (it->function_atend != NULL) {
5878 (*it->function_atend) (it->pointer, it->val);
5879 }
5880 SCTP_FREE(it, SCTP_M_ITER);
5881 }
5882 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5883 SCTP_ITERATOR_LOCK();
5884 if ((sctp_it_ctl.cur_it) &&
5885 (sctp_it_ctl.cur_it->vn == curvnet)) {
5886 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5887 }
5888 SCTP_ITERATOR_UNLOCK();
5889 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5890 SCTP_WQ_ADDR_LOCK();
5891 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5892 LIST_REMOVE(wi, sctp_nxt_addr);
5893 SCTP_DECR_LADDR_COUNT();
5894 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5895 SCTP_FREE(wi->ifa, SCTP_M_IFA);
5896 }
5897 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5898 }
5899 SCTP_WQ_ADDR_UNLOCK();
5900
5901 /*
5902 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5903 * destroyed first).
5904 */
5905 SCTP_IPI_ADDR_WLOCK();
5906 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5907 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5908 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5909 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5910 /* free the ifa */
5911 LIST_REMOVE(ifa, next_bucket);
5912 LIST_REMOVE(ifa, next_ifa);
5913 SCTP_FREE(ifa, SCTP_M_IFA);
5914 }
5915 /* free the ifn */
5916 LIST_REMOVE(ifn, next_bucket);
5917 LIST_REMOVE(ifn, next_ifn);
5918 SCTP_FREE(ifn, SCTP_M_IFN);
5919 }
5920 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5921 /* free the vrf */
5922 LIST_REMOVE(vrf, next_vrf);
5923 SCTP_FREE(vrf, SCTP_M_VRF);
5924 }
5925 SCTP_IPI_ADDR_WUNLOCK();
5926 /* free the vrf hashes */
5927 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5928 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5929
5930 /*
5931 * free the TIMEWAIT list elements malloc'd in the function
5932 * sctp_add_vtag_to_timewait()...
5933 */
5934 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5935 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5936 if (!LIST_EMPTY(chain)) {
5937 prev_twait_block = NULL;
5938 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5939 if (prev_twait_block) {
5940 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5941 }
5942 prev_twait_block = twait_block;
5943 }
5944 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5945 }
5946 }
5947
5948 /* free the locks and mutexes */
5949 #ifdef SCTP_PACKET_LOGGING
5950 SCTP_IP_PKTLOG_DESTROY();
5951 #endif
5952 SCTP_IPI_ADDR_DESTROY();
5953 SCTP_STATLOG_DESTROY();
5954 SCTP_INP_INFO_LOCK_DESTROY();
5955
5956 SCTP_WQ_ADDR_DESTROY();
5957
5958 /* Get rid of other stuff too. */
5959 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5960 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5961 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5962 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5963 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5964 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5965
5966 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5967 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5968 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5969 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5970 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5971 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5972 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5973 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5974 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5975 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5976 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5977 #endif
5978 }
5979
5980 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)5981 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5982 int offset, int limit,
5983 struct sockaddr *src, struct sockaddr *dst,
5984 struct sockaddr *altsa, uint16_t port)
5985 {
5986 /*
5987 * grub through the INIT pulling addresses and loading them to the
5988 * nets structure in the asoc. The from address in the mbuf should
5989 * also be loaded (if it is not already). This routine can be called
5990 * with either INIT or INIT-ACK's as long as the m points to the IP
5991 * packet and the offset points to the beginning of the parameters.
5992 */
5993 struct sctp_inpcb *inp;
5994 struct sctp_nets *net, *nnet, *net_tmp;
5995 struct sctp_paramhdr *phdr, param_buf;
5996 struct sctp_tcb *stcb_tmp;
5997 uint16_t ptype, plen;
5998 struct sockaddr *sa;
5999 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6000 struct sctp_auth_random *p_random = NULL;
6001 uint16_t random_len = 0;
6002 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6003 struct sctp_auth_hmac_algo *hmacs = NULL;
6004 uint16_t hmacs_len = 0;
6005 uint8_t saw_asconf = 0;
6006 uint8_t saw_asconf_ack = 0;
6007 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6008 struct sctp_auth_chunk_list *chunks = NULL;
6009 uint16_t num_chunks = 0;
6010 sctp_key_t *new_key;
6011 uint32_t keylen;
6012 int got_random = 0, got_hmacs = 0, got_chklist = 0;
6013 uint8_t peer_supports_ecn;
6014 uint8_t peer_supports_prsctp;
6015 uint8_t peer_supports_auth;
6016 uint8_t peer_supports_asconf;
6017 uint8_t peer_supports_asconf_ack;
6018 uint8_t peer_supports_reconfig;
6019 uint8_t peer_supports_nrsack;
6020 uint8_t peer_supports_pktdrop;
6021 uint8_t peer_supports_idata;
6022 #ifdef INET
6023 struct sockaddr_in sin;
6024 #endif
6025 #ifdef INET6
6026 struct sockaddr_in6 sin6;
6027 #endif
6028
6029 /* First get the destination address setup too. */
6030 #ifdef INET
6031 memset(&sin, 0, sizeof(sin));
6032 sin.sin_family = AF_INET;
6033 sin.sin_len = sizeof(sin);
6034 sin.sin_port = stcb->rport;
6035 #endif
6036 #ifdef INET6
6037 memset(&sin6, 0, sizeof(sin6));
6038 sin6.sin6_family = AF_INET6;
6039 sin6.sin6_len = sizeof(struct sockaddr_in6);
6040 sin6.sin6_port = stcb->rport;
6041 #endif
6042 if (altsa) {
6043 sa = altsa;
6044 } else {
6045 sa = src;
6046 }
6047 peer_supports_idata = 0;
6048 peer_supports_ecn = 0;
6049 peer_supports_prsctp = 0;
6050 peer_supports_auth = 0;
6051 peer_supports_asconf = 0;
6052 peer_supports_asconf_ack = 0;
6053 peer_supports_reconfig = 0;
6054 peer_supports_nrsack = 0;
6055 peer_supports_pktdrop = 0;
6056 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6057 /* mark all addresses that we have currently on the list */
6058 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6059 }
6060 /* does the source address already exist? if so skip it */
6061 inp = stcb->sctp_ep;
6062 atomic_add_int(&stcb->asoc.refcnt, 1);
6063 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6064 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6065
6066 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6067 /* we must add the source address */
6068 /* no scope set here since we have a tcb already. */
6069 switch (sa->sa_family) {
6070 #ifdef INET
6071 case AF_INET:
6072 if (stcb->asoc.scope.ipv4_addr_legal) {
6073 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6074 return (-1);
6075 }
6076 }
6077 break;
6078 #endif
6079 #ifdef INET6
6080 case AF_INET6:
6081 if (stcb->asoc.scope.ipv6_addr_legal) {
6082 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6083 return (-2);
6084 }
6085 }
6086 break;
6087 #endif
6088 default:
6089 break;
6090 }
6091 } else {
6092 if (net_tmp != NULL && stcb_tmp == stcb) {
6093 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6094 } else if (stcb_tmp != stcb) {
6095 /* It belongs to another association? */
6096 if (stcb_tmp)
6097 SCTP_TCB_UNLOCK(stcb_tmp);
6098 return (-3);
6099 }
6100 }
6101 if (stcb->asoc.state == 0) {
6102 /* the assoc was freed? */
6103 return (-4);
6104 }
6105 /* now we must go through each of the params. */
6106 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
6107 while (phdr) {
6108 ptype = ntohs(phdr->param_type);
6109 plen = ntohs(phdr->param_length);
6110 /*
6111 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6112 * (uint32_t)ptype, (int)plen);
6113 */
6114 if (offset + plen > limit) {
6115 break;
6116 }
6117 if (plen < sizeof(struct sctp_paramhdr)) {
6118 break;
6119 }
6120 #ifdef INET
6121 if (ptype == SCTP_IPV4_ADDRESS) {
6122 if (stcb->asoc.scope.ipv4_addr_legal) {
6123 struct sctp_ipv4addr_param *p4, p4_buf;
6124
6125 /* ok get the v4 address and check/add */
6126 phdr = sctp_get_next_param(m, offset,
6127 (struct sctp_paramhdr *)&p4_buf,
6128 sizeof(p4_buf));
6129 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6130 phdr == NULL) {
6131 return (-5);
6132 }
6133 p4 = (struct sctp_ipv4addr_param *)phdr;
6134 sin.sin_addr.s_addr = p4->addr;
6135 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6136 /* Skip multi-cast addresses */
6137 goto next_param;
6138 }
6139 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6140 (sin.sin_addr.s_addr == INADDR_ANY)) {
6141 goto next_param;
6142 }
6143 sa = (struct sockaddr *)&sin;
6144 inp = stcb->sctp_ep;
6145 atomic_add_int(&stcb->asoc.refcnt, 1);
6146 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6147 dst, stcb);
6148 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6149
6150 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6151 inp == NULL) {
6152 /* we must add the source address */
6153 /*
6154 * no scope set since we have a tcb
6155 * already
6156 */
6157
6158 /*
6159 * we must validate the state again
6160 * here
6161 */
6162 add_it_now:
6163 if (stcb->asoc.state == 0) {
6164 /* the assoc was freed? */
6165 return (-7);
6166 }
6167 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6168 return (-8);
6169 }
6170 } else if (stcb_tmp == stcb) {
6171 if (stcb->asoc.state == 0) {
6172 /* the assoc was freed? */
6173 return (-10);
6174 }
6175 if (net != NULL) {
6176 /* clear flag */
6177 net->dest_state &=
6178 ~SCTP_ADDR_NOT_IN_ASSOC;
6179 }
6180 } else {
6181 /*
6182 * strange, address is in another
6183 * assoc? straighten out locks.
6184 */
6185 if (stcb_tmp) {
6186 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6187 struct mbuf *op_err;
6188 char msg[SCTP_DIAG_INFO_LEN];
6189
6190 /*
6191 * in setup state we
6192 * abort this guy
6193 */
6194 SCTP_SNPRINTF(msg, sizeof(msg),
6195 "%s:%d at %s", __FILE__, __LINE__, __func__);
6196 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6197 msg);
6198 sctp_abort_an_association(stcb_tmp->sctp_ep,
6199 stcb_tmp, op_err, false,
6200 SCTP_SO_NOT_LOCKED);
6201 goto add_it_now;
6202 }
6203 SCTP_TCB_UNLOCK(stcb_tmp);
6204 }
6205
6206 if (stcb->asoc.state == 0) {
6207 /* the assoc was freed? */
6208 return (-12);
6209 }
6210 return (-13);
6211 }
6212 }
6213 } else
6214 #endif
6215 #ifdef INET6
6216 if (ptype == SCTP_IPV6_ADDRESS) {
6217 if (stcb->asoc.scope.ipv6_addr_legal) {
6218 /* ok get the v6 address and check/add */
6219 struct sctp_ipv6addr_param *p6, p6_buf;
6220
6221 phdr = sctp_get_next_param(m, offset,
6222 (struct sctp_paramhdr *)&p6_buf,
6223 sizeof(p6_buf));
6224 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6225 phdr == NULL) {
6226 return (-14);
6227 }
6228 p6 = (struct sctp_ipv6addr_param *)phdr;
6229 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6230 sizeof(p6->addr));
6231 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6232 /* Skip multi-cast addresses */
6233 goto next_param;
6234 }
6235 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6236 /*
6237 * Link local make no sense without
6238 * scope
6239 */
6240 goto next_param;
6241 }
6242 sa = (struct sockaddr *)&sin6;
6243 inp = stcb->sctp_ep;
6244 atomic_add_int(&stcb->asoc.refcnt, 1);
6245 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6246 dst, stcb);
6247 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6248 if (stcb_tmp == NULL &&
6249 (inp == stcb->sctp_ep || inp == NULL)) {
6250 /*
6251 * we must validate the state again
6252 * here
6253 */
6254 add_it_now6:
6255 if (stcb->asoc.state == 0) {
6256 /* the assoc was freed? */
6257 return (-16);
6258 }
6259 /*
6260 * we must add the address, no scope
6261 * set
6262 */
6263 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6264 return (-17);
6265 }
6266 } else if (stcb_tmp == stcb) {
6267 /*
6268 * we must validate the state again
6269 * here
6270 */
6271 if (stcb->asoc.state == 0) {
6272 /* the assoc was freed? */
6273 return (-19);
6274 }
6275 if (net != NULL) {
6276 /* clear flag */
6277 net->dest_state &=
6278 ~SCTP_ADDR_NOT_IN_ASSOC;
6279 }
6280 } else {
6281 /*
6282 * strange, address is in another
6283 * assoc? straighten out locks.
6284 */
6285 if (stcb_tmp) {
6286 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6287 struct mbuf *op_err;
6288 char msg[SCTP_DIAG_INFO_LEN];
6289
6290 /*
6291 * in setup state we
6292 * abort this guy
6293 */
6294 SCTP_SNPRINTF(msg, sizeof(msg),
6295 "%s:%d at %s", __FILE__, __LINE__, __func__);
6296 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6297 msg);
6298 sctp_abort_an_association(stcb_tmp->sctp_ep,
6299 stcb_tmp, op_err, false,
6300 SCTP_SO_NOT_LOCKED);
6301 goto add_it_now6;
6302 }
6303 SCTP_TCB_UNLOCK(stcb_tmp);
6304 }
6305 if (stcb->asoc.state == 0) {
6306 /* the assoc was freed? */
6307 return (-21);
6308 }
6309 return (-22);
6310 }
6311 }
6312 } else
6313 #endif
6314 if (ptype == SCTP_ECN_CAPABLE) {
6315 peer_supports_ecn = 1;
6316 } else if (ptype == SCTP_ULP_ADAPTATION) {
6317 if (stcb->asoc.state != SCTP_STATE_OPEN) {
6318 struct sctp_adaptation_layer_indication ai,
6319 *aip;
6320
6321 phdr = sctp_get_next_param(m, offset,
6322 (struct sctp_paramhdr *)&ai, sizeof(ai));
6323 aip = (struct sctp_adaptation_layer_indication *)phdr;
6324 if (aip) {
6325 stcb->asoc.peers_adaptation = ntohl(aip->indication);
6326 stcb->asoc.adaptation_needed = 1;
6327 }
6328 }
6329 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6330 struct sctp_asconf_addr_param lstore, *fee;
6331 int lptype;
6332 struct sockaddr *lsa = NULL;
6333 #ifdef INET
6334 struct sctp_asconf_addrv4_param *fii;
6335 #endif
6336
6337 if (stcb->asoc.asconf_supported == 0) {
6338 return (-100);
6339 }
6340 if (plen > sizeof(lstore)) {
6341 return (-23);
6342 }
6343 if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6344 return (-101);
6345 }
6346 phdr = sctp_get_next_param(m, offset,
6347 (struct sctp_paramhdr *)&lstore,
6348 plen);
6349 if (phdr == NULL) {
6350 return (-24);
6351 }
6352 fee = (struct sctp_asconf_addr_param *)phdr;
6353 lptype = ntohs(fee->addrp.ph.param_type);
6354 switch (lptype) {
6355 #ifdef INET
6356 case SCTP_IPV4_ADDRESS:
6357 if (plen !=
6358 sizeof(struct sctp_asconf_addrv4_param)) {
6359 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6360 (int)sizeof(struct sctp_asconf_addrv4_param),
6361 plen);
6362 } else {
6363 fii = (struct sctp_asconf_addrv4_param *)fee;
6364 sin.sin_addr.s_addr = fii->addrp.addr;
6365 lsa = (struct sockaddr *)&sin;
6366 }
6367 break;
6368 #endif
6369 #ifdef INET6
6370 case SCTP_IPV6_ADDRESS:
6371 if (plen !=
6372 sizeof(struct sctp_asconf_addr_param)) {
6373 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6374 (int)sizeof(struct sctp_asconf_addr_param),
6375 plen);
6376 } else {
6377 memcpy(sin6.sin6_addr.s6_addr,
6378 fee->addrp.addr,
6379 sizeof(fee->addrp.addr));
6380 lsa = (struct sockaddr *)&sin6;
6381 }
6382 break;
6383 #endif
6384 default:
6385 break;
6386 }
6387 if (lsa) {
6388 (void)sctp_set_primary_addr(stcb, sa, NULL);
6389 }
6390 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6391 stcb->asoc.peer_supports_nat = 1;
6392 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6393 /* Peer supports pr-sctp */
6394 peer_supports_prsctp = 1;
6395 } else if (ptype == SCTP_ZERO_CHECKSUM_ACCEPTABLE) {
6396 struct sctp_zero_checksum_acceptable zero_chksum,
6397 *zero_chksum_p;
6398
6399 phdr = sctp_get_next_param(m, offset,
6400 (struct sctp_paramhdr *)&zero_chksum,
6401 sizeof(struct sctp_zero_checksum_acceptable));
6402 if (phdr != NULL) {
6403 /*
6404 * Only send zero checksums if the upper
6405 * layer has enabled the support for the
6406 * same method as allowed by the peer.
6407 */
6408 zero_chksum_p = (struct sctp_zero_checksum_acceptable *)phdr;
6409 if ((ntohl(zero_chksum_p->edmid) != SCTP_EDMID_NONE) &&
6410 (ntohl(zero_chksum_p->edmid) == stcb->asoc.rcv_edmid)) {
6411 stcb->asoc.snd_edmid = stcb->asoc.rcv_edmid;
6412 }
6413 }
6414 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6415 /* A supported extension chunk */
6416 struct sctp_supported_chunk_types_param *pr_supported;
6417 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6418 int num_ent, i;
6419
6420 if (plen > sizeof(local_store)) {
6421 return (-35);
6422 }
6423 phdr = sctp_get_next_param(m, offset,
6424 (struct sctp_paramhdr *)&local_store, plen);
6425 if (phdr == NULL) {
6426 return (-25);
6427 }
6428 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6429 num_ent = plen - sizeof(struct sctp_paramhdr);
6430 for (i = 0; i < num_ent; i++) {
6431 switch (pr_supported->chunk_types[i]) {
6432 case SCTP_ASCONF:
6433 peer_supports_asconf = 1;
6434 break;
6435 case SCTP_ASCONF_ACK:
6436 peer_supports_asconf_ack = 1;
6437 break;
6438 case SCTP_FORWARD_CUM_TSN:
6439 peer_supports_prsctp = 1;
6440 break;
6441 case SCTP_PACKET_DROPPED:
6442 peer_supports_pktdrop = 1;
6443 break;
6444 case SCTP_NR_SELECTIVE_ACK:
6445 peer_supports_nrsack = 1;
6446 break;
6447 case SCTP_STREAM_RESET:
6448 peer_supports_reconfig = 1;
6449 break;
6450 case SCTP_AUTHENTICATION:
6451 peer_supports_auth = 1;
6452 break;
6453 case SCTP_IDATA:
6454 peer_supports_idata = 1;
6455 break;
6456 default:
6457 /* one I have not learned yet */
6458 break;
6459 }
6460 }
6461 } else if (ptype == SCTP_RANDOM) {
6462 if (plen > sizeof(random_store))
6463 break;
6464 if (got_random) {
6465 /* already processed a RANDOM */
6466 goto next_param;
6467 }
6468 phdr = sctp_get_next_param(m, offset,
6469 (struct sctp_paramhdr *)random_store,
6470 plen);
6471 if (phdr == NULL)
6472 return (-26);
6473 p_random = (struct sctp_auth_random *)phdr;
6474 random_len = plen - sizeof(*p_random);
6475 /* enforce the random length */
6476 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6477 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6478 return (-27);
6479 }
6480 got_random = 1;
6481 } else if (ptype == SCTP_HMAC_LIST) {
6482 uint16_t num_hmacs;
6483 uint16_t i;
6484
6485 if (plen > sizeof(hmacs_store))
6486 break;
6487 if (got_hmacs) {
6488 /* already processed a HMAC list */
6489 goto next_param;
6490 }
6491 phdr = sctp_get_next_param(m, offset,
6492 (struct sctp_paramhdr *)hmacs_store,
6493 plen);
6494 if (phdr == NULL)
6495 return (-28);
6496 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6497 hmacs_len = plen - sizeof(*hmacs);
6498 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6499 /* validate the hmac list */
6500 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6501 return (-29);
6502 }
6503 if (stcb->asoc.peer_hmacs != NULL)
6504 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6505 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6506 if (stcb->asoc.peer_hmacs != NULL) {
6507 for (i = 0; i < num_hmacs; i++) {
6508 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6509 ntohs(hmacs->hmac_ids[i]));
6510 }
6511 }
6512 got_hmacs = 1;
6513 } else if (ptype == SCTP_CHUNK_LIST) {
6514 int i;
6515
6516 if (plen > sizeof(chunks_store))
6517 break;
6518 if (got_chklist) {
6519 /* already processed a Chunks list */
6520 goto next_param;
6521 }
6522 phdr = sctp_get_next_param(m, offset,
6523 (struct sctp_paramhdr *)chunks_store,
6524 plen);
6525 if (phdr == NULL)
6526 return (-30);
6527 chunks = (struct sctp_auth_chunk_list *)phdr;
6528 num_chunks = plen - sizeof(*chunks);
6529 if (stcb->asoc.peer_auth_chunks != NULL)
6530 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6531 else
6532 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6533 for (i = 0; i < num_chunks; i++) {
6534 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6535 stcb->asoc.peer_auth_chunks);
6536 /* record asconf/asconf-ack if listed */
6537 if (chunks->chunk_types[i] == SCTP_ASCONF)
6538 saw_asconf = 1;
6539 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6540 saw_asconf_ack = 1;
6541 }
6542 got_chklist = 1;
6543 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6544 (ptype == SCTP_STATE_COOKIE) ||
6545 (ptype == SCTP_UNRECOG_PARAM) ||
6546 (ptype == SCTP_COOKIE_PRESERVE) ||
6547 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6548 (ptype == SCTP_ADD_IP_ADDRESS) ||
6549 (ptype == SCTP_DEL_IP_ADDRESS) ||
6550 (ptype == SCTP_ERROR_CAUSE_IND) ||
6551 (ptype == SCTP_SUCCESS_REPORT)) {
6552 /* don't care */
6553 } else {
6554 if ((ptype & 0x8000) == 0x0000) {
6555 /*
6556 * must stop processing the rest of the
6557 * param's. Any report bits were handled
6558 * with the call to
6559 * sctp_arethere_unrecognized_parameters()
6560 * when the INIT or INIT-ACK was first seen.
6561 */
6562 break;
6563 }
6564 }
6565
6566 next_param:
6567 offset += SCTP_SIZE32(plen);
6568 if (offset >= limit) {
6569 break;
6570 }
6571 phdr = sctp_get_next_param(m, offset, ¶m_buf,
6572 sizeof(param_buf));
6573 }
6574 /* Now check to see if we need to purge any addresses */
6575 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6576 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6577 SCTP_ADDR_NOT_IN_ASSOC) {
6578 /* This address has been removed from the asoc */
6579 /* remove and free it */
6580 stcb->asoc.numnets--;
6581 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6582 if (net == stcb->asoc.alternate) {
6583 sctp_free_remote_addr(stcb->asoc.alternate);
6584 stcb->asoc.alternate = NULL;
6585 }
6586 if (net == stcb->asoc.primary_destination) {
6587 stcb->asoc.primary_destination = NULL;
6588 sctp_select_primary_destination(stcb);
6589 }
6590 sctp_free_remote_addr(net);
6591 }
6592 }
6593 if ((stcb->asoc.ecn_supported == 1) &&
6594 (peer_supports_ecn == 0)) {
6595 stcb->asoc.ecn_supported = 0;
6596 }
6597 if ((stcb->asoc.prsctp_supported == 1) &&
6598 (peer_supports_prsctp == 0)) {
6599 stcb->asoc.prsctp_supported = 0;
6600 }
6601 if ((stcb->asoc.auth_supported == 1) &&
6602 ((peer_supports_auth == 0) ||
6603 (got_random == 0) || (got_hmacs == 0))) {
6604 stcb->asoc.auth_supported = 0;
6605 }
6606 if ((stcb->asoc.asconf_supported == 1) &&
6607 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6608 (stcb->asoc.auth_supported == 0) ||
6609 (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6610 stcb->asoc.asconf_supported = 0;
6611 }
6612 if ((stcb->asoc.reconfig_supported == 1) &&
6613 (peer_supports_reconfig == 0)) {
6614 stcb->asoc.reconfig_supported = 0;
6615 }
6616 if ((stcb->asoc.idata_supported == 1) &&
6617 (peer_supports_idata == 0)) {
6618 stcb->asoc.idata_supported = 0;
6619 }
6620 if ((stcb->asoc.nrsack_supported == 1) &&
6621 (peer_supports_nrsack == 0)) {
6622 stcb->asoc.nrsack_supported = 0;
6623 }
6624 if ((stcb->asoc.pktdrop_supported == 1) &&
6625 (peer_supports_pktdrop == 0)) {
6626 stcb->asoc.pktdrop_supported = 0;
6627 }
6628 /* validate authentication required parameters */
6629 if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6630 /* peer does not support auth but sent a chunks list? */
6631 return (-31);
6632 }
6633 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6634 /* peer supports asconf but not auth? */
6635 return (-32);
6636 } else if ((peer_supports_asconf == 1) &&
6637 (peer_supports_auth == 1) &&
6638 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6639 return (-33);
6640 }
6641 /* concatenate the full random key */
6642 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6643 if (chunks != NULL) {
6644 keylen += sizeof(*chunks) + num_chunks;
6645 }
6646 new_key = sctp_alloc_key(keylen);
6647 if (new_key != NULL) {
6648 /* copy in the RANDOM */
6649 if (p_random != NULL) {
6650 keylen = sizeof(*p_random) + random_len;
6651 memcpy(new_key->key, p_random, keylen);
6652 } else {
6653 keylen = 0;
6654 }
6655 /* append in the AUTH chunks */
6656 if (chunks != NULL) {
6657 memcpy(new_key->key + keylen, chunks,
6658 sizeof(*chunks) + num_chunks);
6659 keylen += sizeof(*chunks) + num_chunks;
6660 }
6661 /* append in the HMACs */
6662 if (hmacs != NULL) {
6663 memcpy(new_key->key + keylen, hmacs,
6664 sizeof(*hmacs) + hmacs_len);
6665 }
6666 } else {
6667 /* failed to get memory for the key */
6668 return (-34);
6669 }
6670 if (stcb->asoc.authinfo.peer_random != NULL)
6671 sctp_free_key(stcb->asoc.authinfo.peer_random);
6672 stcb->asoc.authinfo.peer_random = new_key;
6673 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6674 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6675
6676 return (0);
6677 }
6678
6679 int
sctp_set_primary_addr(struct sctp_tcb * stcb,struct sockaddr * sa,struct sctp_nets * net)6680 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6681 struct sctp_nets *net)
6682 {
6683 /* make sure the requested primary address exists in the assoc */
6684 if (net == NULL && sa)
6685 net = sctp_findnet(stcb, sa);
6686
6687 if (net == NULL) {
6688 /* didn't find the requested primary address! */
6689 return (-1);
6690 } else {
6691 /* set the primary address */
6692 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6693 /* Must be confirmed, so queue to set */
6694 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6695 return (0);
6696 }
6697 stcb->asoc.primary_destination = net;
6698 if (((net->dest_state & SCTP_ADDR_PF) == 0) &&
6699 (stcb->asoc.alternate != NULL)) {
6700 sctp_free_remote_addr(stcb->asoc.alternate);
6701 stcb->asoc.alternate = NULL;
6702 }
6703 net = TAILQ_FIRST(&stcb->asoc.nets);
6704 if (net != stcb->asoc.primary_destination) {
6705 /*
6706 * first one on the list is NOT the primary
6707 * sctp_cmpaddr() is much more efficient if the
6708 * primary is the first on the list, make it so.
6709 */
6710 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6711 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6712 }
6713 return (0);
6714 }
6715 }
6716
6717 bool
sctp_is_vtag_good(uint32_t tag,uint16_t lport,uint16_t rport,struct timeval * now)6718 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6719 {
6720 struct sctpasochead *head;
6721 struct sctp_tcb *stcb;
6722
6723 SCTP_INP_INFO_LOCK_ASSERT();
6724
6725 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))];
6726 LIST_FOREACH(stcb, head, sctp_asocs) {
6727 /*
6728 * We choose not to lock anything here. TCB's can't be
6729 * removed since we have the read lock, so they can't be
6730 * freed on us, same thing for the INP. I may be wrong with
6731 * this assumption, but we will go with it for now :-)
6732 */
6733 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6734 continue;
6735 }
6736 if (stcb->asoc.my_vtag == tag) {
6737 /* candidate */
6738 if (stcb->rport != rport) {
6739 continue;
6740 }
6741 if (stcb->sctp_ep->sctp_lport != lport) {
6742 continue;
6743 }
6744 /* The tag is currently used, so don't use it. */
6745 return (false);
6746 }
6747 }
6748 return (!sctp_is_in_timewait(tag, lport, rport, now->tv_sec));
6749 }
6750
6751 static void
sctp_drain_mbufs(struct sctp_tcb * stcb)6752 sctp_drain_mbufs(struct sctp_tcb *stcb)
6753 {
6754 /*
6755 * We must hunt this association for MBUF's past the cumack (i.e.
6756 * out of order data that we can renege on).
6757 */
6758 struct sctp_association *asoc;
6759 struct sctp_tmit_chunk *chk, *nchk;
6760 uint32_t cumulative_tsn_p1;
6761 struct sctp_queued_to_read *control, *ncontrol;
6762 int cnt, strmat;
6763 uint32_t gap, i;
6764 int fnd = 0;
6765
6766 /* We look for anything larger than the cum-ack + 1 */
6767
6768 asoc = &stcb->asoc;
6769 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6770 /* none we can reneg on. */
6771 return;
6772 }
6773 SCTP_STAT_INCR(sctps_protocol_drains_done);
6774 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6775 cnt = 0;
6776 /* Ok that was fun, now we will drain all the inbound streams? */
6777 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6778 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6779 #ifdef INVARIANTS
6780 if (control->on_strm_q != SCTP_ON_ORDERED) {
6781 panic("Huh control: %p on_q: %d -- not ordered?",
6782 control, control->on_strm_q);
6783 }
6784 #endif
6785 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6786 /* Yep it is above cum-ack */
6787 cnt++;
6788 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6789 KASSERT(control->length > 0, ("control has zero length"));
6790 if (asoc->size_on_all_streams >= control->length) {
6791 asoc->size_on_all_streams -= control->length;
6792 } else {
6793 #ifdef INVARIANTS
6794 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6795 #else
6796 asoc->size_on_all_streams = 0;
6797 #endif
6798 }
6799 sctp_ucount_decr(asoc->cnt_on_all_streams);
6800 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6801 if (control->on_read_q) {
6802 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6803 control->on_read_q = 0;
6804 }
6805 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6806 control->on_strm_q = 0;
6807 if (control->data) {
6808 sctp_m_freem(control->data);
6809 control->data = NULL;
6810 }
6811 sctp_free_remote_addr(control->whoFrom);
6812 /* Now its reasm? */
6813 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6814 cnt++;
6815 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6816 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6817 if (asoc->size_on_reasm_queue >= chk->send_size) {
6818 asoc->size_on_reasm_queue -= chk->send_size;
6819 } else {
6820 #ifdef INVARIANTS
6821 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6822 #else
6823 asoc->size_on_reasm_queue = 0;
6824 #endif
6825 }
6826 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6827 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6828 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6829 if (chk->data) {
6830 sctp_m_freem(chk->data);
6831 chk->data = NULL;
6832 }
6833 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6834 }
6835 sctp_free_a_readq(stcb, control);
6836 }
6837 }
6838 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6839 #ifdef INVARIANTS
6840 if (control->on_strm_q != SCTP_ON_UNORDERED) {
6841 panic("Huh control: %p on_q: %d -- not unordered?",
6842 control, control->on_strm_q);
6843 }
6844 #endif
6845 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6846 /* Yep it is above cum-ack */
6847 cnt++;
6848 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6849 KASSERT(control->length > 0, ("control has zero length"));
6850 if (asoc->size_on_all_streams >= control->length) {
6851 asoc->size_on_all_streams -= control->length;
6852 } else {
6853 #ifdef INVARIANTS
6854 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6855 #else
6856 asoc->size_on_all_streams = 0;
6857 #endif
6858 }
6859 sctp_ucount_decr(asoc->cnt_on_all_streams);
6860 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6861 if (control->on_read_q) {
6862 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6863 control->on_read_q = 0;
6864 }
6865 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6866 control->on_strm_q = 0;
6867 if (control->data) {
6868 sctp_m_freem(control->data);
6869 control->data = NULL;
6870 }
6871 sctp_free_remote_addr(control->whoFrom);
6872 /* Now its reasm? */
6873 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6874 cnt++;
6875 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6876 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6877 if (asoc->size_on_reasm_queue >= chk->send_size) {
6878 asoc->size_on_reasm_queue -= chk->send_size;
6879 } else {
6880 #ifdef INVARIANTS
6881 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6882 #else
6883 asoc->size_on_reasm_queue = 0;
6884 #endif
6885 }
6886 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6887 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6888 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6889 if (chk->data) {
6890 sctp_m_freem(chk->data);
6891 chk->data = NULL;
6892 }
6893 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6894 }
6895 sctp_free_a_readq(stcb, control);
6896 }
6897 }
6898 }
6899 if (cnt) {
6900 /* We must back down to see what the new highest is */
6901 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6902 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6903 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6904 asoc->highest_tsn_inside_map = i;
6905 fnd = 1;
6906 break;
6907 }
6908 }
6909 if (!fnd) {
6910 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6911 }
6912
6913 /*
6914 * Question, should we go through the delivery queue? The
6915 * only reason things are on here is the app not reading OR
6916 * a p-d-api up. An attacker COULD send enough in to
6917 * initiate the PD-API and then send a bunch of stuff to
6918 * other streams... these would wind up on the delivery
6919 * queue.. and then we would not get to them. But in order
6920 * to do this I then have to back-track and un-deliver
6921 * sequence numbers in streams.. el-yucko. I think for now
6922 * we will NOT look at the delivery queue and leave it to be
6923 * something to consider later. An alternative would be to
6924 * abort the P-D-API with a notification and then deliver
6925 * the data.... Or another method might be to keep track of
6926 * how many times the situation occurs and if we see a
6927 * possible attack underway just abort the association.
6928 */
6929 #ifdef SCTP_DEBUG
6930 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6931 #endif
6932 /*
6933 * Now do we need to find a new
6934 * asoc->highest_tsn_inside_map?
6935 */
6936 asoc->last_revoke_count = cnt;
6937 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6938 SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6939 /* sa_ignore NO_NULL_CHK */
6940 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6941 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6942 }
6943 /*
6944 * Another issue, in un-setting the TSN's in the mapping array we
6945 * DID NOT adjust the highest_tsn marker. This will cause one of
6946 * two things to occur. It may cause us to do extra work in checking
6947 * for our mapping array movement. More importantly it may cause us
6948 * to SACK every datagram. This may not be a bad thing though since
6949 * we will recover once we get our cum-ack above and all this stuff
6950 * we dumped recovered.
6951 */
6952 }
6953
6954 static void
sctp_drain(void)6955 sctp_drain(void)
6956 {
6957 struct epoch_tracker et;
6958
6959 VNET_ITERATOR_DECL(vnet_iter);
6960
6961 NET_EPOCH_ENTER(et);
6962 /*
6963 * We must walk the PCB lists for ALL associations here. The system
6964 * is LOW on MBUF's and needs help. This is where reneging will
6965 * occur. We really hope this does NOT happen!
6966 */
6967 VNET_LIST_RLOCK_NOSLEEP();
6968 VNET_FOREACH(vnet_iter) {
6969 CURVNET_SET(vnet_iter);
6970 struct sctp_inpcb *inp;
6971 struct sctp_tcb *stcb;
6972
6973 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6974 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6975 #ifdef VIMAGE
6976 continue;
6977 #else
6978 NET_EPOCH_EXIT(et);
6979 return;
6980 #endif
6981 }
6982 SCTP_INP_INFO_RLOCK();
6983 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6984 /* For each endpoint */
6985 SCTP_INP_RLOCK(inp);
6986 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6987 /* For each association */
6988 SCTP_TCB_LOCK(stcb);
6989 sctp_drain_mbufs(stcb);
6990 SCTP_TCB_UNLOCK(stcb);
6991 }
6992 SCTP_INP_RUNLOCK(inp);
6993 }
6994 SCTP_INP_INFO_RUNLOCK();
6995 CURVNET_RESTORE();
6996 }
6997 VNET_LIST_RUNLOCK_NOSLEEP();
6998 NET_EPOCH_EXIT(et);
6999 }
7000
7001 EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT);
7002 EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT);
7003
7004 /*
7005 * start a new iterator
7006 * iterates through all endpoints and associations based on the pcb_state
7007 * flags and asoc_state. "af" (mandatory) is executed for all matching
7008 * assocs and "ef" (optional) is executed when the iterator completes.
7009 * "inpf" (optional) is executed for each new endpoint as it is being
7010 * iterated through. inpe (optional) is called when the inp completes
7011 * its way through all the stcbs.
7012 */
7013 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)7014 sctp_initiate_iterator(inp_func inpf,
7015 asoc_func af,
7016 inp_func inpe,
7017 uint32_t pcb_state,
7018 uint32_t pcb_features,
7019 uint32_t asoc_state,
7020 void *argp,
7021 uint32_t argi,
7022 end_func ef,
7023 struct sctp_inpcb *s_inp,
7024 uint8_t chunk_output_off)
7025 {
7026 struct sctp_iterator *it = NULL;
7027
7028 if (af == NULL) {
7029 return (-1);
7030 }
7031 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7032 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7033 SCTP_BASE_VAR(sctp_pcb_initialized));
7034 return (-1);
7035 }
7036 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7037 SCTP_M_ITER);
7038 if (it == NULL) {
7039 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7040 return (-1);
7041 }
7042 memset(it, 0, sizeof(*it));
7043 it->function_assoc = af;
7044 it->function_inp = inpf;
7045 if (inpf)
7046 it->done_current_ep = 0;
7047 else
7048 it->done_current_ep = 1;
7049 it->function_atend = ef;
7050 it->pointer = argp;
7051 it->val = argi;
7052 it->pcb_flags = pcb_state;
7053 it->pcb_features = pcb_features;
7054 it->asoc_state = asoc_state;
7055 it->function_inp_end = inpe;
7056 it->no_chunk_output = chunk_output_off;
7057 it->vn = curvnet;
7058 if (s_inp) {
7059 /* Assume lock is held here */
7060 it->inp = s_inp;
7061 SCTP_INP_INCR_REF(it->inp);
7062 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7063 } else {
7064 SCTP_INP_INFO_RLOCK();
7065 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7066 if (it->inp) {
7067 SCTP_INP_INCR_REF(it->inp);
7068 }
7069 SCTP_INP_INFO_RUNLOCK();
7070 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7071 }
7072 SCTP_IPI_ITERATOR_WQ_LOCK();
7073 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7074 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7075 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7076 SCTP_BASE_VAR(sctp_pcb_initialized), it);
7077 SCTP_FREE(it, SCTP_M_ITER);
7078 return (-1);
7079 }
7080 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7081 if (sctp_it_ctl.iterator_running == 0) {
7082 sctp_wakeup_iterator();
7083 }
7084 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7085 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7086 return (0);
7087 }
7088
7089 /*
7090 * Atomically add flags to the sctp_flags of an inp.
7091 * To be used when the write lock of the inp is not held.
7092 */
7093 void
sctp_pcb_add_flags(struct sctp_inpcb * inp,uint32_t flags)7094 sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags)
7095 {
7096 uint32_t old_flags, new_flags;
7097
7098 do {
7099 old_flags = inp->sctp_flags;
7100 new_flags = old_flags | flags;
7101 } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0);
7102 }
7103