netwerk/sctp/src/netinet/sctp_pcb.c@deefc01c0e14
netwerk/sctp/src/netinet/sctp_pcb.c
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rwxr-xr-x
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
1 /*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
33 #ifdef __FreeBSD__
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 258765 2013-11-30 12:51:19Z tuexen $");
36 #endif
38 #include <netinet/sctp_os.h>
39 #ifdef __FreeBSD__
40 #include <sys/proc.h>
41 #endif
42 #include <netinet/sctp_var.h>
43 #include <netinet/sctp_sysctl.h>
44 #include <netinet/sctp_pcb.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp.h>
47 #include <netinet/sctp_header.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_output.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_bsd_addr.h>
52 #if defined(__FreeBSD__) && __FreeBSD_version >= 803000
53 #include <netinet/sctp_dtrace_define.h>
54 #endif
55 #if !defined(__Userspace_os_Windows)
56 #include <netinet/udp.h>
57 #endif
58 #ifdef INET6
59 #if defined(__Userspace__)
60 #include "user_ip6_var.h"
61 #else
62 #include <netinet6/ip6_var.h>
63 #endif
64 #endif
65 #if defined(__FreeBSD__)
66 #include <sys/sched.h>
67 #include <sys/smp.h>
68 #include <sys/unistd.h>
69 #endif
70 #if defined(__Userspace__)
71 #include <user_socketvar.h>
72 #endif
74 #if defined(__APPLE__)
75 #define APPLE_FILE_NO 4
76 #endif
78 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
79 VNET_DEFINE(struct sctp_base_info, system_base_info);
80 #else
81 struct sctp_base_info system_base_info;
82 #endif
84 #if defined(__Userspace__)
85 #if defined(INET) || defined(INET6)
86 struct ifaddrs *g_interfaces;
87 #endif
88 #endif
89 /* FIX: we don't handle multiple link local scopes */
90 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
91 #ifdef INET6
92 int
93 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
94 {
95 #ifdef SCTP_EMBEDDED_V6_SCOPE
96 #if defined(__APPLE__)
97 struct in6_addr tmp_a, tmp_b;
99 tmp_a = a->sin6_addr;
100 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
101 if (in6_embedscope(&tmp_a, a, NULL, NULL) != 0) {
102 #else
103 if (in6_embedscope(&tmp_a, a, NULL, NULL, NULL) != 0) {
104 #endif
105 return (0);
106 }
107 tmp_b = b->sin6_addr;
108 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
109 if (in6_embedscope(&tmp_b, b, NULL, NULL) != 0) {
110 #else
111 if (in6_embedscope(&tmp_b, b, NULL, NULL, NULL) != 0) {
112 #endif
113 return (0);
114 }
115 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
116 #elif defined(SCTP_KAME)
117 struct sockaddr_in6 tmp_a, tmp_b;
119 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
120 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
121 return (0);
122 }
123 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
124 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
125 return (0);
126 }
127 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
128 #else
129 struct in6_addr tmp_a, tmp_b;
131 tmp_a = a->sin6_addr;
132 if (in6_embedscope(&tmp_a, a) != 0) {
133 return (0);
134 }
135 tmp_b = b->sin6_addr;
136 if (in6_embedscope(&tmp_b, b) != 0) {
137 return (0);
138 }
139 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
140 #endif
141 #else
142 return (IN6_ARE_ADDR_EQUAL(&(a->sin6_addr), &(b->sin6_addr)));
143 #endif /* SCTP_EMBEDDED_V6_SCOPE */
144 }
145 #endif
147 void
148 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
149 {
150 /*
151 * We really don't need to lock this, but I will just because it
152 * does not hurt.
153 */
154 SCTP_INP_INFO_RLOCK();
155 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
156 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
157 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
158 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
159 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
160 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
161 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
162 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
163 SCTP_INP_INFO_RUNLOCK();
164 }
166 /*-
167 * Addresses are added to VRF's (Virtual Router's). For BSD we
168 * have only the default VRF 0. We maintain a hash list of
169 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
170 * these has a list of addresses. When we add a new address
171 * to a VRF we lookup the ifn/ifn_index, if the ifn does
172 * not exist we create it and add it to the list of IFN's
173 * within the VRF. Once we have the sctp_ifn, we add the
174 * address to the list. So we look something like:
175 *
176 * hash-vrf-table
177 * vrf-> ifn-> ifn -> ifn
178 * vrf |
179 * ... +--ifa-> ifa -> ifa
180 * vrf
181 *
182 * We keep these separate lists since the SCTP subsystem will
183 * point to these from its source address selection nets structure.
184 * When an address is deleted it does not happen right away on
185 * the SCTP side, it gets scheduled. What we do when a
186 * delete happens is immediately remove the address from
187 * the master list and decrement the refcount. As our
188 * addip iterator works through and frees the src address
189 * selection pointing to the sctp_ifa, eventually the refcount
190 * will reach 0 and we will delete it. Note that it is assumed
191 * that any locking on system level ifn/ifa is done at the
192 * caller of these functions and these routines will only
193 * lock the SCTP structures as they add or delete things.
194 *
195 * Other notes on VRF concepts.
196 * - An endpoint can be in multiple VRF's
197 * - An association lives within a VRF and only one VRF.
198 * - Any incoming packet we can deduce the VRF for by
199 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
200 * - Any downward send call or connect call must supply the
201 * VRF via ancillary data or via some sort of set default
202 * VRF socket option call (again for BSD no brainer since
203 * the VRF is always 0).
204 * - An endpoint may add multiple VRF's to it.
205 * - Listening sockets can accept associations in any
206 * of the VRF's they are in but the assoc will end up
207 * in only one VRF (gotten from the packet or connect/send).
208 *
209 */
211 struct sctp_vrf *
212 sctp_allocate_vrf(int vrf_id)
213 {
214 struct sctp_vrf *vrf = NULL;
215 struct sctp_vrflist *bucket;
217 /* First allocate the VRF structure */
218 vrf = sctp_find_vrf(vrf_id);
219 if (vrf) {
220 /* Already allocated */
221 return (vrf);
222 }
223 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
224 SCTP_M_VRF);
225 if (vrf == NULL) {
226 /* No memory */
227 #ifdef INVARIANTS
228 panic("No memory for VRF:%d", vrf_id);
229 #endif
230 return (NULL);
231 }
232 /* setup the VRF */
233 memset(vrf, 0, sizeof(struct sctp_vrf));
234 vrf->vrf_id = vrf_id;
235 LIST_INIT(&vrf->ifnlist);
236 vrf->total_ifa_count = 0;
237 vrf->refcount = 0;
238 /* now also setup table ids */
239 SCTP_INIT_VRF_TABLEID(vrf);
240 /* Init the HASH of addresses */
241 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
242 &vrf->vrf_addr_hashmark);
243 if (vrf->vrf_addr_hash == NULL) {
244 /* No memory */
245 #ifdef INVARIANTS
246 panic("No memory for VRF:%d", vrf_id);
247 #endif
248 SCTP_FREE(vrf, SCTP_M_VRF);
249 return (NULL);
250 }
252 /* Add it to the hash table */
253 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
254 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
255 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
256 return (vrf);
257 }
260 struct sctp_ifn *
261 sctp_find_ifn(void *ifn, uint32_t ifn_index)
262 {
263 struct sctp_ifn *sctp_ifnp;
264 struct sctp_ifnlist *hash_ifn_head;
266 /* We assume the lock is held for the addresses
267 * if that's wrong problems could occur :-)
268 */
269 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
270 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
271 if (sctp_ifnp->ifn_index == ifn_index) {
272 return (sctp_ifnp);
273 }
274 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
275 return (sctp_ifnp);
276 }
277 }
278 return (NULL);
279 }
282 struct sctp_vrf *
283 sctp_find_vrf(uint32_t vrf_id)
284 {
285 struct sctp_vrflist *bucket;
286 struct sctp_vrf *liste;
288 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
289 LIST_FOREACH(liste, bucket, next_vrf) {
290 if (vrf_id == liste->vrf_id) {
291 return (liste);
292 }
293 }
294 return (NULL);
295 }
298 void
299 sctp_free_vrf(struct sctp_vrf *vrf)
300 {
301 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
302 if (vrf->vrf_addr_hash) {
303 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
304 vrf->vrf_addr_hash = NULL;
305 }
306 /* We zero'd the count */
307 LIST_REMOVE(vrf, next_vrf);
308 SCTP_FREE(vrf, SCTP_M_VRF);
309 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
310 }
311 }
314 void
315 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
316 {
317 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
318 /* We zero'd the count */
319 if (sctp_ifnp->vrf) {
320 sctp_free_vrf(sctp_ifnp->vrf);
321 }
322 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
323 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
324 }
325 }
328 void
329 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
330 {
331 struct sctp_ifn *sctp_ifnp;
333 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
334 if (sctp_ifnp != NULL) {
335 sctp_ifnp->ifn_mtu = mtu;
336 }
337 }
340 void
341 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
342 {
343 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
344 /* We zero'd the count */
345 if (sctp_ifap->ifn_p) {
346 sctp_free_ifn(sctp_ifap->ifn_p);
347 }
348 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
349 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
350 }
351 }
354 static void
355 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
356 {
357 struct sctp_ifn *found;
359 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
360 if (found == NULL) {
361 /* Not in the list.. sorry */
362 return;
363 }
364 if (hold_addr_lock == 0)
365 SCTP_IPI_ADDR_WLOCK();
366 LIST_REMOVE(sctp_ifnp, next_bucket);
367 LIST_REMOVE(sctp_ifnp, next_ifn);
368 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
369 sctp_ifnp->registered_af);
370 if (hold_addr_lock == 0)
371 SCTP_IPI_ADDR_WUNLOCK();
372 /* Take away the reference, and possibly free it */
373 sctp_free_ifn(sctp_ifnp);
374 }
377 void
378 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
379 const char *if_name, uint32_t ifn_index)
380 {
381 struct sctp_vrf *vrf;
382 struct sctp_ifa *sctp_ifap;
384 SCTP_IPI_ADDR_RLOCK();
385 vrf = sctp_find_vrf(vrf_id);
386 if (vrf == NULL) {
387 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
388 goto out;
390 }
391 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
392 if (sctp_ifap == NULL) {
393 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
394 goto out;
395 }
396 if (sctp_ifap->ifn_p == NULL) {
397 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
398 goto out;
399 }
400 if (if_name) {
401 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
402 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
403 sctp_ifap->ifn_p->ifn_name, if_name);
404 goto out;
405 }
406 } else {
407 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
408 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
409 sctp_ifap->ifn_p->ifn_index, ifn_index);
410 goto out;
411 }
412 }
414 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
415 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
416 out:
417 SCTP_IPI_ADDR_RUNLOCK();
418 }
421 void
422 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
423 const char *if_name, uint32_t ifn_index)
424 {
425 struct sctp_vrf *vrf;
426 struct sctp_ifa *sctp_ifap;
428 SCTP_IPI_ADDR_RLOCK();
429 vrf = sctp_find_vrf(vrf_id);
430 if (vrf == NULL) {
431 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
432 goto out;
434 }
435 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
436 if (sctp_ifap == NULL) {
437 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
438 goto out;
439 }
440 if (sctp_ifap->ifn_p == NULL) {
441 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
442 goto out;
443 }
444 if (if_name) {
445 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
446 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
447 sctp_ifap->ifn_p->ifn_name, if_name);
448 goto out;
449 }
450 } else {
451 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
452 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
453 sctp_ifap->ifn_p->ifn_index, ifn_index);
454 goto out;
455 }
456 }
458 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
459 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
460 out:
461 SCTP_IPI_ADDR_RUNLOCK();
462 }
465 /*-
466 * Add an ifa to an ifn.
467 * Register the interface as necessary.
468 * NOTE: ADDR write lock MUST be held.
469 */
470 static void
471 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
472 {
473 int ifa_af;
475 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
476 sctp_ifap->ifn_p = sctp_ifnp;
477 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
478 /* update address counts */
479 sctp_ifnp->ifa_count++;
480 ifa_af = sctp_ifap->address.sa.sa_family;
481 switch (ifa_af) {
482 #ifdef INET
483 case AF_INET:
484 sctp_ifnp->num_v4++;
485 break;
486 #endif
487 #ifdef INET6
488 case AF_INET6:
489 sctp_ifnp->num_v6++;
490 break;
491 #endif
492 default:
493 break;
494 }
495 if (sctp_ifnp->ifa_count == 1) {
496 /* register the new interface */
497 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
498 sctp_ifnp->registered_af = ifa_af;
499 }
500 }
503 /*-
504 * Remove an ifa from its ifn.
505 * If no more addresses exist, remove the ifn too. Otherwise, re-register
506 * the interface based on the remaining address families left.
507 * NOTE: ADDR write lock MUST be held.
508 */
509 static void
510 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
511 {
512 LIST_REMOVE(sctp_ifap, next_ifa);
513 if (sctp_ifap->ifn_p) {
514 /* update address counts */
515 sctp_ifap->ifn_p->ifa_count--;
516 switch (sctp_ifap->address.sa.sa_family) {
517 #ifdef INET
518 case AF_INET:
519 sctp_ifap->ifn_p->num_v4--;
520 break;
521 #endif
522 #ifdef INET6
523 case AF_INET6:
524 sctp_ifap->ifn_p->num_v6--;
525 break;
526 #endif
527 default:
528 break;
529 }
531 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
532 /* remove the ifn, possibly freeing it */
533 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
534 } else {
535 /* re-register address family type, if needed */
536 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
537 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
538 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
539 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
540 sctp_ifap->ifn_p->registered_af = AF_INET;
541 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
542 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
543 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
544 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
545 sctp_ifap->ifn_p->registered_af = AF_INET6;
546 }
547 /* free the ifn refcount */
548 sctp_free_ifn(sctp_ifap->ifn_p);
549 }
550 sctp_ifap->ifn_p = NULL;
551 }
552 }
555 struct sctp_ifa *
556 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
557 uint32_t ifn_type, const char *if_name, void *ifa,
558 struct sockaddr *addr, uint32_t ifa_flags,
559 int dynamic_add)
560 {
561 struct sctp_vrf *vrf;
562 struct sctp_ifn *sctp_ifnp = NULL;
563 struct sctp_ifa *sctp_ifap = NULL;
564 struct sctp_ifalist *hash_addr_head;
565 struct sctp_ifnlist *hash_ifn_head;
566 uint32_t hash_of_addr;
567 int new_ifn_af = 0;
569 #ifdef SCTP_DEBUG
570 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
571 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
572 #endif
573 SCTP_IPI_ADDR_WLOCK();
574 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
575 if (sctp_ifnp) {
576 vrf = sctp_ifnp->vrf;
577 } else {
578 vrf = sctp_find_vrf(vrf_id);
579 if (vrf == NULL) {
580 vrf = sctp_allocate_vrf(vrf_id);
581 if (vrf == NULL) {
582 SCTP_IPI_ADDR_WUNLOCK();
583 return (NULL);
584 }
585 }
586 }
587 if (sctp_ifnp == NULL) {
588 /* build one and add it, can't hold lock
589 * until after malloc done though.
590 */
591 SCTP_IPI_ADDR_WUNLOCK();
592 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
593 sizeof(struct sctp_ifn), SCTP_M_IFN);
594 if (sctp_ifnp == NULL) {
595 #ifdef INVARIANTS
596 panic("No memory for IFN");
597 #endif
598 return (NULL);
599 }
600 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
601 sctp_ifnp->ifn_index = ifn_index;
602 sctp_ifnp->ifn_p = ifn;
603 sctp_ifnp->ifn_type = ifn_type;
604 sctp_ifnp->refcount = 0;
605 sctp_ifnp->vrf = vrf;
606 atomic_add_int(&vrf->refcount, 1);
607 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
608 if (if_name != NULL) {
609 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
610 } else {
611 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
612 }
613 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
614 LIST_INIT(&sctp_ifnp->ifalist);
615 SCTP_IPI_ADDR_WLOCK();
616 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
617 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
618 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
619 new_ifn_af = 1;
620 }
621 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
622 if (sctp_ifap) {
623 /* Hmm, it already exists? */
624 if ((sctp_ifap->ifn_p) &&
625 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
626 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
627 sctp_ifap->ifn_p->ifn_name, ifn_index,
628 (void *)sctp_ifap);
629 if (new_ifn_af) {
630 /* Remove the created one that we don't want */
631 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
632 }
633 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
634 /* easy to solve, just switch back to active */
635 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
636 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
637 sctp_ifap->ifn_p = sctp_ifnp;
638 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
639 }
640 exit_stage_left:
641 SCTP_IPI_ADDR_WUNLOCK();
642 return (sctp_ifap);
643 } else {
644 if (sctp_ifap->ifn_p) {
645 /*
646 * The last IFN gets the address, remove the
647 * old one
648 */
649 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
650 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
651 sctp_ifap->ifn_p->ifn_index, if_name,
652 ifn_index);
653 /* remove the address from the old ifn */
654 sctp_remove_ifa_from_ifn(sctp_ifap);
655 /* move the address over to the new ifn */
656 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
657 goto exit_stage_left;
658 } else {
659 /* repair ifnp which was NULL ? */
660 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
661 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
662 (void *)sctp_ifnp, (void *)sctp_ifap);
663 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
664 }
665 goto exit_stage_left;
666 }
667 }
668 SCTP_IPI_ADDR_WUNLOCK();
669 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
670 if (sctp_ifap == NULL) {
671 #ifdef INVARIANTS
672 panic("No memory for IFA");
673 #endif
674 return (NULL);
675 }
676 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
677 sctp_ifap->ifn_p = sctp_ifnp;
678 atomic_add_int(&sctp_ifnp->refcount, 1);
679 sctp_ifap->vrf_id = vrf_id;
680 sctp_ifap->ifa = ifa;
681 #ifdef HAVE_SA_LEN
682 memcpy(&sctp_ifap->address, addr, addr->sa_len);
683 #else
684 switch (addr->sa_family) {
685 #ifdef INET
686 case AF_INET:
687 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in));
688 break;
689 #endif
690 #ifdef INET6
691 case AF_INET6:
692 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in6));
693 break;
694 #endif
695 #if defined(__Userspace__)
696 case AF_CONN:
697 memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_conn));
698 break;
699 #endif
700 default:
701 /* TSNH */
702 break;
703 }
704 #endif
705 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
706 sctp_ifap->flags = ifa_flags;
707 /* Set scope */
708 switch (sctp_ifap->address.sa.sa_family) {
709 #ifdef INET
710 case AF_INET:
711 {
712 struct sockaddr_in *sin;
714 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
715 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
716 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
717 sctp_ifap->src_is_loop = 1;
718 }
719 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
720 sctp_ifap->src_is_priv = 1;
721 }
722 sctp_ifnp->num_v4++;
723 if (new_ifn_af)
724 new_ifn_af = AF_INET;
725 break;
726 }
727 #endif
728 #ifdef INET6
729 case AF_INET6:
730 {
731 /* ok to use deprecated addresses? */
732 struct sockaddr_in6 *sin6;
734 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
735 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
736 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
737 sctp_ifap->src_is_loop = 1;
738 }
739 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
740 sctp_ifap->src_is_priv = 1;
741 }
742 sctp_ifnp->num_v6++;
743 if (new_ifn_af)
744 new_ifn_af = AF_INET6;
745 break;
746 }
747 #endif
748 #if defined(__Userspace__)
749 case AF_CONN:
750 if (new_ifn_af)
751 new_ifn_af = AF_CONN;
752 break;
753 #endif
754 default:
755 new_ifn_af = 0;
756 break;
757 }
758 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
760 if ((sctp_ifap->src_is_priv == 0) &&
761 (sctp_ifap->src_is_loop == 0)) {
762 sctp_ifap->src_is_glob = 1;
763 }
764 SCTP_IPI_ADDR_WLOCK();
765 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
766 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
767 sctp_ifap->refcount = 1;
768 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
769 sctp_ifnp->ifa_count++;
770 vrf->total_ifa_count++;
771 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
772 if (new_ifn_af) {
773 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
774 sctp_ifnp->registered_af = new_ifn_af;
775 }
776 SCTP_IPI_ADDR_WUNLOCK();
777 if (dynamic_add) {
778 /* Bump up the refcount so that when the timer
779 * completes it will drop back down.
780 */
781 struct sctp_laddr *wi;
783 atomic_add_int(&sctp_ifap->refcount, 1);
784 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
785 if (wi == NULL) {
786 /*
787 * Gak, what can we do? We have lost an address
788 * change can you say HOSED?
789 */
790 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
791 /* Opps, must decrement the count */
792 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
793 if_name);
794 return (NULL);
795 }
796 SCTP_INCR_LADDR_COUNT();
797 bzero(wi, sizeof(*wi));
798 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
799 wi->ifa = sctp_ifap;
800 wi->action = SCTP_ADD_IP_ADDRESS;
802 SCTP_WQ_ADDR_LOCK();
803 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
804 SCTP_WQ_ADDR_UNLOCK();
806 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
807 (struct sctp_inpcb *)NULL,
808 (struct sctp_tcb *)NULL,
809 (struct sctp_nets *)NULL);
810 } else {
811 /* it's ready for use */
812 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
813 }
814 return (sctp_ifap);
815 }
817 void
818 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
819 uint32_t ifn_index, const char *if_name)
820 {
821 struct sctp_vrf *vrf;
822 struct sctp_ifa *sctp_ifap = NULL;
824 SCTP_IPI_ADDR_WLOCK();
825 vrf = sctp_find_vrf(vrf_id);
826 if (vrf == NULL) {
827 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
828 goto out_now;
829 }
831 #ifdef SCTP_DEBUG
832 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
833 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
834 #endif
835 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
836 if (sctp_ifap) {
837 /* Validate the delete */
838 if (sctp_ifap->ifn_p) {
839 int valid = 0;
840 /*-
841 * The name has priority over the ifn_index
842 * if its given. We do this especially for
843 * panda who might recycle indexes fast.
844 */
845 if (if_name) {
846 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
847 /* They match its a correct delete */
848 valid = 1;
849 }
850 }
851 if (!valid) {
852 /* last ditch check ifn_index */
853 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
854 valid = 1;
855 }
856 }
857 if (!valid) {
858 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
859 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
860 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
861 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
862 SCTP_IPI_ADDR_WUNLOCK();
863 return;
864 }
865 }
866 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
867 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
868 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
869 vrf->total_ifa_count--;
870 LIST_REMOVE(sctp_ifap, next_bucket);
871 sctp_remove_ifa_from_ifn(sctp_ifap);
872 }
873 #ifdef SCTP_DEBUG
874 else {
875 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
876 ifn_index);
877 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
878 }
879 #endif
881 out_now:
882 SCTP_IPI_ADDR_WUNLOCK();
883 if (sctp_ifap) {
884 struct sctp_laddr *wi;
886 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
887 if (wi == NULL) {
888 /*
889 * Gak, what can we do? We have lost an address
890 * change can you say HOSED?
891 */
892 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
894 /* Oops, must decrement the count */
895 sctp_free_ifa(sctp_ifap);
896 return;
897 }
898 SCTP_INCR_LADDR_COUNT();
899 bzero(wi, sizeof(*wi));
900 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
901 wi->ifa = sctp_ifap;
902 wi->action = SCTP_DEL_IP_ADDRESS;
903 SCTP_WQ_ADDR_LOCK();
904 /*
905 * Should this really be a tailq? As it is we will process the
906 * newest first :-0
907 */
908 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
909 SCTP_WQ_ADDR_UNLOCK();
911 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
912 (struct sctp_inpcb *)NULL,
913 (struct sctp_tcb *)NULL,
914 (struct sctp_nets *)NULL);
915 }
916 return;
917 }
920 static int
921 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
922 {
923 int loopback_scope;
924 #if defined(INET)
925 int ipv4_local_scope, ipv4_addr_legal;
926 #endif
927 #if defined(INET6)
928 int local_scope, site_scope, ipv6_addr_legal;
929 #endif
930 #if defined(__Userspace__)
931 int conn_addr_legal;
932 #endif
933 struct sctp_vrf *vrf;
934 struct sctp_ifn *sctp_ifn;
935 struct sctp_ifa *sctp_ifa;
937 loopback_scope = stcb->asoc.scope.loopback_scope;
938 #if defined(INET)
939 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
940 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
941 #endif
942 #if defined(INET6)
943 local_scope = stcb->asoc.scope.local_scope;
944 site_scope = stcb->asoc.scope.site_scope;
945 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
946 #endif
947 #if defined(__Userspace__)
948 conn_addr_legal = stcb->asoc.scope.conn_addr_legal;
949 #endif
951 SCTP_IPI_ADDR_RLOCK();
952 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
953 if (vrf == NULL) {
954 /* no vrf, no addresses */
955 SCTP_IPI_ADDR_RUNLOCK();
956 return (0);
957 }
959 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
960 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
961 if ((loopback_scope == 0) &&
962 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
963 continue;
964 }
965 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
966 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
967 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
968 /* We allow pending addresses, where we
969 * have sent an asconf-add to be considered
970 * valid.
971 */
972 continue;
973 }
974 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
975 continue;
976 }
977 switch (sctp_ifa->address.sa.sa_family) {
978 #ifdef INET
979 case AF_INET:
980 if (ipv4_addr_legal) {
981 struct sockaddr_in *sin, *rsin;
983 sin = &sctp_ifa->address.sin;
984 rsin = (struct sockaddr_in *)to;
985 if ((ipv4_local_scope == 0) &&
986 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
987 continue;
988 }
989 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
990 SCTP_IPI_ADDR_RUNLOCK();
991 return (1);
992 }
993 }
994 break;
995 #endif
996 #ifdef INET6
997 case AF_INET6:
998 if (ipv6_addr_legal) {
999 struct sockaddr_in6 *sin6, *rsin6;
1000 #if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME)
1001 struct sockaddr_in6 lsa6;
1002 #endif
1003 sin6 = &sctp_ifa->address.sin6;
1004 rsin6 = (struct sockaddr_in6 *)to;
1005 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1006 if (local_scope == 0)
1007 continue;
1008 #if defined(SCTP_EMBEDDED_V6_SCOPE)
1009 if (sin6->sin6_scope_id == 0) {
1010 #ifdef SCTP_KAME
1011 if (sa6_recoverscope(sin6) != 0)
1012 continue;
1013 #else
1014 lsa6 = *sin6;
1015 if (in6_recoverscope(&lsa6,
1016 &lsa6.sin6_addr,
1017 NULL))
1018 continue;
1019 sin6 = &lsa6;
1020 #endif /* SCTP_KAME */
1021 }
1022 #endif /* SCTP_EMBEDDED_V6_SCOPE */
1023 }
1024 if ((site_scope == 0) &&
1025 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1026 continue;
1027 }
1028 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1029 SCTP_IPI_ADDR_RUNLOCK();
1030 return (1);
1031 }
1032 }
1033 break;
1034 #endif
1035 #if defined(__Userspace__)
1036 case AF_CONN:
1037 if (conn_addr_legal) {
1038 struct sockaddr_conn *sconn, *rsconn;
1040 sconn = &sctp_ifa->address.sconn;
1041 rsconn = (struct sockaddr_conn *)to;
1042 if (sconn->sconn_addr == rsconn->sconn_addr) {
1043 SCTP_IPI_ADDR_RUNLOCK();
1044 return (1);
1045 }
1046 }
1047 break;
1048 #endif
1049 default:
1050 /* TSNH */
1051 break;
1052 }
1053 }
1054 }
1055 } else {
1056 struct sctp_laddr *laddr;
1058 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1059 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1060 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1061 continue;
1062 }
1063 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1064 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1065 /* We allow pending addresses, where we
1066 * have sent an asconf-add to be considered
1067 * valid.
1068 */
1069 continue;
1070 }
1071 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1072 continue;
1073 }
1074 switch (to->sa_family) {
1075 #ifdef INET
1076 case AF_INET:
1077 {
1078 struct sockaddr_in *sin, *rsin;
1080 sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1081 rsin = (struct sockaddr_in *)to;
1082 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1083 SCTP_IPI_ADDR_RUNLOCK();
1084 return (1);
1085 }
1086 break;
1087 }
1088 #endif
1089 #ifdef INET6
1090 case AF_INET6:
1091 {
1092 struct sockaddr_in6 *sin6, *rsin6;
1094 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1095 rsin6 = (struct sockaddr_in6 *)to;
1096 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1097 SCTP_IPI_ADDR_RUNLOCK();
1098 return (1);
1099 }
1100 break;
1101 }
1103 #endif
1104 #if defined(__Userspace__)
1105 case AF_CONN:
1106 {
1107 struct sockaddr_conn *sconn, *rsconn;
1109 sconn = (struct sockaddr_conn *)&laddr->ifa->address.sconn;
1110 rsconn = (struct sockaddr_conn *)to;
1111 if (sconn->sconn_addr == rsconn->sconn_addr) {
1112 SCTP_IPI_ADDR_RUNLOCK();
1113 return (1);
1114 }
1115 break;
1116 }
1117 #endif
1118 default:
1119 /* TSNH */
1120 break;
1121 }
1123 }
1124 }
1125 SCTP_IPI_ADDR_RUNLOCK();
1126 return (0);
1127 }
1130 static struct sctp_tcb *
1131 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1132 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1133 {
1134 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1135 /*
1136 * If we support the TCP model, then we must now dig through to see
1137 * if we can find our endpoint in the list of tcp ep's.
1138 */
1139 uint16_t lport, rport;
1140 struct sctppcbhead *ephead;
1141 struct sctp_inpcb *inp;
1142 struct sctp_laddr *laddr;
1143 struct sctp_tcb *stcb;
1144 struct sctp_nets *net;
1145 #ifdef SCTP_MVRF
1146 int fnd, i;
1147 #endif
1149 if ((to == NULL) || (from == NULL)) {
1150 return (NULL);
1151 }
1153 switch (to->sa_family) {
1154 #ifdef INET
1155 case AF_INET:
1156 if (from->sa_family == AF_INET) {
1157 lport = ((struct sockaddr_in *)to)->sin_port;
1158 rport = ((struct sockaddr_in *)from)->sin_port;
1159 } else {
1160 return (NULL);
1161 }
1162 break;
1163 #endif
1164 #ifdef INET6
1165 case AF_INET6:
1166 if (from->sa_family == AF_INET6) {
1167 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1168 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1169 } else {
1170 return (NULL);
1171 }
1172 break;
1173 #endif
1174 #if defined(__Userspace__)
1175 case AF_CONN:
1176 if (from->sa_family == AF_CONN) {
1177 lport = ((struct sockaddr_conn *)to)->sconn_port;
1178 rport = ((struct sockaddr_conn *)from)->sconn_port;
1179 } else {
1180 return (NULL);
1181 }
1182 break;
1183 #endif
1184 default:
1185 return (NULL);
1186 }
1187 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1188 /*
1189 * Ok now for each of the guys in this bucket we must look and see:
1190 * - Does the remote port match. - Does there single association's
1191 * addresses match this address (to). If so we update p_ep to point
1192 * to this ep and return the tcb from it.
1193 */
1194 LIST_FOREACH(inp, ephead, sctp_hash) {
1195 SCTP_INP_RLOCK(inp);
1196 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1197 SCTP_INP_RUNLOCK(inp);
1198 continue;
1199 }
1200 if (lport != inp->sctp_lport) {
1201 SCTP_INP_RUNLOCK(inp);
1202 continue;
1203 }
1204 #ifdef SCTP_MVRF
1205 fnd = 0;
1206 for (i = 0; i < inp->num_vrfs; i++) {
1207 if (inp->m_vrf_ids[i] == vrf_id) {
1208 fnd = 1;
1209 break;
1210 }
1211 }
1212 if (fnd == 0) {
1213 SCTP_INP_RUNLOCK(inp);
1214 continue;
1215 }
1216 #else
1217 if (inp->def_vrf_id != vrf_id) {
1218 SCTP_INP_RUNLOCK(inp);
1219 continue;
1220 }
1221 #endif
1222 /* check to see if the ep has one of the addresses */
1223 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1224 /* We are NOT bound all, so look further */
1225 int match = 0;
1227 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1229 if (laddr->ifa == NULL) {
1230 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1231 continue;
1232 }
1233 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1234 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1235 continue;
1236 }
1237 if (laddr->ifa->address.sa.sa_family ==
1238 to->sa_family) {
1239 /* see if it matches */
1240 #ifdef INET
1241 if (from->sa_family == AF_INET) {
1242 struct sockaddr_in *intf_addr, *sin;
1244 intf_addr = &laddr->ifa->address.sin;
1245 sin = (struct sockaddr_in *)to;
1246 if (sin->sin_addr.s_addr ==
1247 intf_addr->sin_addr.s_addr) {
1248 match = 1;
1249 break;
1250 }
1251 }
1252 #endif
1253 #ifdef INET6
1254 if (from->sa_family == AF_INET6) {
1255 struct sockaddr_in6 *intf_addr6;
1256 struct sockaddr_in6 *sin6;
1258 sin6 = (struct sockaddr_in6 *)
1259 to;
1260 intf_addr6 = &laddr->ifa->address.sin6;
1262 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1263 intf_addr6)) {
1264 match = 1;
1265 break;
1266 }
1267 }
1268 #endif
1269 #if defined(__Userspace__)
1270 if (from->sa_family == AF_CONN) {
1271 struct sockaddr_conn *intf_addr, *sconn;
1273 intf_addr = &laddr->ifa->address.sconn;
1274 sconn = (struct sockaddr_conn *)to;
1275 if (sconn->sconn_addr ==
1276 intf_addr->sconn_addr) {
1277 match = 1;
1278 break;
1279 }
1280 }
1281 #endif
1282 }
1283 }
1284 if (match == 0) {
1285 /* This endpoint does not have this address */
1286 SCTP_INP_RUNLOCK(inp);
1287 continue;
1288 }
1289 }
1290 /*
1291 * Ok if we hit here the ep has the address, does it hold
1292 * the tcb?
1293 */
1294 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1295 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1296 if (stcb == NULL) {
1297 SCTP_INP_RUNLOCK(inp);
1298 continue;
1299 }
1300 SCTP_TCB_LOCK(stcb);
1301 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1302 SCTP_TCB_UNLOCK(stcb);
1303 SCTP_INP_RUNLOCK(inp);
1304 continue;
1305 }
1306 if (stcb->rport != rport) {
1307 /* remote port does not match. */
1308 SCTP_TCB_UNLOCK(stcb);
1309 SCTP_INP_RUNLOCK(inp);
1310 continue;
1311 }
1312 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1313 SCTP_TCB_UNLOCK(stcb);
1314 SCTP_INP_RUNLOCK(inp);
1315 continue;
1316 }
1317 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1318 SCTP_TCB_UNLOCK(stcb);
1319 SCTP_INP_RUNLOCK(inp);
1320 continue;
1321 }
1322 /* Does this TCB have a matching address? */
1323 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1325 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1326 /* not the same family, can't be a match */
1327 continue;
1328 }
1329 switch (from->sa_family) {
1330 #ifdef INET
1331 case AF_INET:
1332 {
1333 struct sockaddr_in *sin, *rsin;
1335 sin = (struct sockaddr_in *)&net->ro._l_addr;
1336 rsin = (struct sockaddr_in *)from;
1337 if (sin->sin_addr.s_addr ==
1338 rsin->sin_addr.s_addr) {
1339 /* found it */
1340 if (netp != NULL) {
1341 *netp = net;
1342 }
1343 /* Update the endpoint pointer */
1344 *inp_p = inp;
1345 SCTP_INP_RUNLOCK(inp);
1346 return (stcb);
1347 }
1348 break;
1349 }
1350 #endif
1351 #ifdef INET6
1352 case AF_INET6:
1353 {
1354 struct sockaddr_in6 *sin6, *rsin6;
1356 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1357 rsin6 = (struct sockaddr_in6 *)from;
1358 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1359 rsin6)) {
1360 /* found it */
1361 if (netp != NULL) {
1362 *netp = net;
1363 }
1364 /* Update the endpoint pointer */
1365 *inp_p = inp;
1366 SCTP_INP_RUNLOCK(inp);
1367 return (stcb);
1368 }
1369 break;
1370 }
1371 #endif
1372 #if defined(__Userspace__)
1373 case AF_CONN:
1374 {
1375 struct sockaddr_conn *sconn, *rsconn;
1377 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1378 rsconn = (struct sockaddr_conn *)from;
1379 if (sconn->sconn_addr == rsconn->sconn_addr) {
1380 /* found it */
1381 if (netp != NULL) {
1382 *netp = net;
1383 }
1384 /* Update the endpoint pointer */
1385 *inp_p = inp;
1386 SCTP_INP_RUNLOCK(inp);
1387 return (stcb);
1388 }
1389 break;
1390 }
1391 #endif
1392 default:
1393 /* TSNH */
1394 break;
1395 }
1396 }
1397 SCTP_TCB_UNLOCK(stcb);
1398 SCTP_INP_RUNLOCK(inp);
1399 }
1400 return (NULL);
1401 }
1404 /*
1405 * rules for use
1406 *
1407 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1408 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1409 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1410 * NULL.
1411 */
1413 struct sctp_tcb *
1414 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1415 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1416 {
1417 struct sctpasochead *head;
1418 struct sctp_inpcb *inp;
1419 struct sctp_tcb *stcb = NULL;
1420 struct sctp_nets *net;
1421 uint16_t rport;
1423 inp = *inp_p;
1424 switch (remote->sa_family) {
1425 #ifdef INET
1426 case AF_INET:
1427 rport = (((struct sockaddr_in *)remote)->sin_port);
1428 break;
1429 #endif
1430 #ifdef INET6
1431 case AF_INET6:
1432 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1433 break;
1434 #endif
1435 #if defined(__Userspace__)
1436 case AF_CONN:
1437 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1438 break;
1439 #endif
1440 default:
1441 return (NULL);
1442 }
1443 if (locked_tcb) {
1444 /*
1445 * UN-lock so we can do proper locking here this occurs when
1446 * called from load_addresses_from_init.
1447 */
1448 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1449 SCTP_TCB_UNLOCK(locked_tcb);
1450 }
1451 SCTP_INP_INFO_RLOCK();
1452 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1453 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1454 /*-
1455 * Now either this guy is our listener or it's the
1456 * connector. If it is the one that issued the connect, then
1457 * it's only chance is to be the first TCB in the list. If
1458 * it is the acceptor, then do the special_lookup to hash
1459 * and find the real inp.
1460 */
1461 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1462 /* to is peer addr, from is my addr */
1463 #ifndef SCTP_MVRF
1464 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1465 netp, inp->def_vrf_id);
1466 if ((stcb != NULL) && (locked_tcb == NULL)) {
1467 /* we have a locked tcb, lower refcount */
1468 SCTP_INP_DECR_REF(inp);
1469 }
1470 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1471 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1472 SCTP_TCB_LOCK(locked_tcb);
1473 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1474 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1475 }
1476 #else
1477 /*-
1478 * MVRF is tricky, we must look in every VRF
1479 * the endpoint has.
1480 */
1481 int i;
1483 for (i = 0; i < inp->num_vrfs; i++) {
1484 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1485 netp, inp->m_vrf_ids[i]);
1486 if ((stcb != NULL) && (locked_tcb == NULL)) {
1487 /* we have a locked tcb, lower refcount */
1488 SCTP_INP_DECR_REF(inp);
1489 break;
1490 }
1491 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1492 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1493 SCTP_TCB_LOCK(locked_tcb);
1494 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1495 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1496 break;
1497 }
1498 }
1499 #endif
1500 SCTP_INP_INFO_RUNLOCK();
1501 return (stcb);
1502 } else {
1503 SCTP_INP_WLOCK(inp);
1504 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1505 goto null_return;
1506 }
1507 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1508 if (stcb == NULL) {
1509 goto null_return;
1510 }
1511 SCTP_TCB_LOCK(stcb);
1513 if (stcb->rport != rport) {
1514 /* remote port does not match. */
1515 SCTP_TCB_UNLOCK(stcb);
1516 goto null_return;
1517 }
1518 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1519 SCTP_TCB_UNLOCK(stcb);
1520 goto null_return;
1521 }
1522 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1523 SCTP_TCB_UNLOCK(stcb);
1524 goto null_return;
1525 }
1526 /* now look at the list of remote addresses */
1527 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1528 #ifdef INVARIANTS
1529 if (net == (TAILQ_NEXT(net, sctp_next))) {
1530 panic("Corrupt net list");
1531 }
1532 #endif
1533 if (net->ro._l_addr.sa.sa_family !=
1534 remote->sa_family) {
1535 /* not the same family */
1536 continue;
1537 }
1538 switch (remote->sa_family) {
1539 #ifdef INET
1540 case AF_INET:
1541 {
1542 struct sockaddr_in *sin, *rsin;
1544 sin = (struct sockaddr_in *)
1545 &net->ro._l_addr;
1546 rsin = (struct sockaddr_in *)remote;
1547 if (sin->sin_addr.s_addr ==
1548 rsin->sin_addr.s_addr) {
1549 /* found it */
1550 if (netp != NULL) {
1551 *netp = net;
1552 }
1553 if (locked_tcb == NULL) {
1554 SCTP_INP_DECR_REF(inp);
1555 } else if (locked_tcb != stcb) {
1556 SCTP_TCB_LOCK(locked_tcb);
1557 }
1558 if (locked_tcb) {
1559 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1560 }
1562 SCTP_INP_WUNLOCK(inp);
1563 SCTP_INP_INFO_RUNLOCK();
1564 return (stcb);
1565 }
1566 break;
1567 }
1568 #endif
1569 #ifdef INET6
1570 case AF_INET6:
1571 {
1572 struct sockaddr_in6 *sin6, *rsin6;
1574 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1575 rsin6 = (struct sockaddr_in6 *)remote;
1576 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1577 rsin6)) {
1578 /* found it */
1579 if (netp != NULL) {
1580 *netp = net;
1581 }
1582 if (locked_tcb == NULL) {
1583 SCTP_INP_DECR_REF(inp);
1584 } else if (locked_tcb != stcb) {
1585 SCTP_TCB_LOCK(locked_tcb);
1586 }
1587 if (locked_tcb) {
1588 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1589 }
1590 SCTP_INP_WUNLOCK(inp);
1591 SCTP_INP_INFO_RUNLOCK();
1592 return (stcb);
1593 }
1594 break;
1595 }
1596 #endif
1597 #if defined(__Userspace__)
1598 case AF_CONN:
1599 {
1600 struct sockaddr_conn *sconn, *rsconn;
1602 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1603 rsconn = (struct sockaddr_conn *)remote;
1604 if (sconn->sconn_addr == rsconn->sconn_addr) {
1605 /* found it */
1606 if (netp != NULL) {
1607 *netp = net;
1608 }
1609 if (locked_tcb == NULL) {
1610 SCTP_INP_DECR_REF(inp);
1611 } else if (locked_tcb != stcb) {
1612 SCTP_TCB_LOCK(locked_tcb);
1613 }
1614 if (locked_tcb) {
1615 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1616 }
1617 SCTP_INP_WUNLOCK(inp);
1618 SCTP_INP_INFO_RUNLOCK();
1619 return (stcb);
1620 }
1621 break;
1622 }
1623 #endif
1624 default:
1625 /* TSNH */
1626 break;
1627 }
1628 }
1629 SCTP_TCB_UNLOCK(stcb);
1630 }
1631 } else {
1632 SCTP_INP_WLOCK(inp);
1633 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1634 goto null_return;
1635 }
1636 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1637 inp->sctp_hashmark)];
1638 if (head == NULL) {
1639 goto null_return;
1640 }
1641 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1642 if (stcb->rport != rport) {
1643 /* remote port does not match */
1644 continue;
1645 }
1646 SCTP_TCB_LOCK(stcb);
1647 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1648 SCTP_TCB_UNLOCK(stcb);
1649 continue;
1650 }
1651 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1652 SCTP_TCB_UNLOCK(stcb);
1653 continue;
1654 }
1655 /* now look at the list of remote addresses */
1656 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1657 #ifdef INVARIANTS
1658 if (net == (TAILQ_NEXT(net, sctp_next))) {
1659 panic("Corrupt net list");
1660 }
1661 #endif
1662 if (net->ro._l_addr.sa.sa_family !=
1663 remote->sa_family) {
1664 /* not the same family */
1665 continue;
1666 }
1667 switch (remote->sa_family) {
1668 #ifdef INET
1669 case AF_INET:
1670 {
1671 struct sockaddr_in *sin, *rsin;
1673 sin = (struct sockaddr_in *)
1674 &net->ro._l_addr;
1675 rsin = (struct sockaddr_in *)remote;
1676 if (sin->sin_addr.s_addr ==
1677 rsin->sin_addr.s_addr) {
1678 /* found it */
1679 if (netp != NULL) {
1680 *netp = net;
1681 }
1682 if (locked_tcb == NULL) {
1683 SCTP_INP_DECR_REF(inp);
1684 } else if (locked_tcb != stcb) {
1685 SCTP_TCB_LOCK(locked_tcb);
1686 }
1687 if (locked_tcb) {
1688 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1689 }
1690 SCTP_INP_WUNLOCK(inp);
1691 SCTP_INP_INFO_RUNLOCK();
1692 return (stcb);
1693 }
1694 break;
1695 }
1696 #endif
1697 #ifdef INET6
1698 case AF_INET6:
1699 {
1700 struct sockaddr_in6 *sin6, *rsin6;
1702 sin6 = (struct sockaddr_in6 *)
1703 &net->ro._l_addr;
1704 rsin6 = (struct sockaddr_in6 *)remote;
1705 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1706 rsin6)) {
1707 /* found it */
1708 if (netp != NULL) {
1709 *netp = net;
1710 }
1711 if (locked_tcb == NULL) {
1712 SCTP_INP_DECR_REF(inp);
1713 } else if (locked_tcb != stcb) {
1714 SCTP_TCB_LOCK(locked_tcb);
1715 }
1716 if (locked_tcb) {
1717 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1718 }
1719 SCTP_INP_WUNLOCK(inp);
1720 SCTP_INP_INFO_RUNLOCK();
1721 return (stcb);
1722 }
1723 break;
1724 }
1725 #endif
1726 #if defined(__Userspace__)
1727 case AF_CONN:
1728 {
1729 struct sockaddr_conn *sconn, *rsconn;
1731 sconn = (struct sockaddr_conn *)&net->ro._l_addr;
1732 rsconn = (struct sockaddr_conn *)remote;
1733 if (sconn->sconn_addr == rsconn->sconn_addr) {
1734 /* found it */
1735 if (netp != NULL) {
1736 *netp = net;
1737 }
1738 if (locked_tcb == NULL) {
1739 SCTP_INP_DECR_REF(inp);
1740 } else if (locked_tcb != stcb) {
1741 SCTP_TCB_LOCK(locked_tcb);
1742 }
1743 if (locked_tcb) {
1744 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1745 }
1746 SCTP_INP_WUNLOCK(inp);
1747 SCTP_INP_INFO_RUNLOCK();
1748 return (stcb);
1749 }
1750 break;
1751 }
1752 #endif
1753 default:
1754 /* TSNH */
1755 break;
1756 }
1757 }
1758 SCTP_TCB_UNLOCK(stcb);
1759 }
1760 }
1761 null_return:
1762 /* clean up for returning null */
1763 if (locked_tcb) {
1764 SCTP_TCB_LOCK(locked_tcb);
1765 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1766 }
1767 SCTP_INP_WUNLOCK(inp);
1768 SCTP_INP_INFO_RUNLOCK();
1769 /* not found */
1770 return (NULL);
1771 }
1774 /*
1775 * Find an association for a specific endpoint using the association id given
1776 * out in the COMM_UP notification
1777 */
1778 struct sctp_tcb *
1779 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1780 {
1781 /*
1782 * Use my the assoc_id to find a endpoint
1783 */
1784 struct sctpasochead *head;
1785 struct sctp_tcb *stcb;
1786 uint32_t id;
1788 if (inp == NULL) {
1789 SCTP_PRINTF("TSNH ep_associd\n");
1790 return (NULL);
1791 }
1792 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1793 SCTP_PRINTF("TSNH ep_associd0\n");
1794 return (NULL);
1795 }
1796 id = (uint32_t)asoc_id;
1797 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1798 if (head == NULL) {
1799 /* invalid id TSNH */
1800 SCTP_PRINTF("TSNH ep_associd1\n");
1801 return (NULL);
1802 }
1803 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1804 if (stcb->asoc.assoc_id == id) {
1805 if (inp != stcb->sctp_ep) {
1806 /*
1807 * some other guy has the same id active (id
1808 * collision ??).
1809 */
1810 SCTP_PRINTF("TSNH ep_associd2\n");
1811 continue;
1812 }
1813 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1814 continue;
1815 }
1816 if (want_lock) {
1817 SCTP_TCB_LOCK(stcb);
1818 }
1819 return (stcb);
1820 }
1821 }
1822 return (NULL);
1823 }
1826 struct sctp_tcb *
1827 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1828 {
1829 struct sctp_tcb *stcb;
1831 SCTP_INP_RLOCK(inp);
1832 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1833 SCTP_INP_RUNLOCK(inp);
1834 return (stcb);
1835 }
1838 /*
1839 * Endpoint probe expects that the INP_INFO is locked.
1840 */
1841 static struct sctp_inpcb *
1842 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1843 uint16_t lport, uint32_t vrf_id)
1844 {
1845 struct sctp_inpcb *inp;
1846 struct sctp_laddr *laddr;
1847 #ifdef INET
1848 struct sockaddr_in *sin;
1849 #endif
1850 #ifdef INET6
1851 struct sockaddr_in6 *sin6;
1852 struct sockaddr_in6 *intf_addr6;
1853 #endif
1854 #if defined(__Userspace__)
1855 struct sockaddr_conn *sconn;
1856 #endif
1857 #ifdef SCTP_MVRF
1858 int i;
1859 #endif
1860 int fnd;
1862 #ifdef INET
1863 sin = NULL;
1864 #endif
1865 #ifdef INET6
1866 sin6 = NULL;
1867 #endif
1868 #if defined(__Userspace__)
1869 sconn = NULL;
1870 #endif
1871 switch (nam->sa_family) {
1872 #ifdef INET
1873 case AF_INET:
1874 sin = (struct sockaddr_in *)nam;
1875 break;
1876 #endif
1877 #ifdef INET6
1878 case AF_INET6:
1879 sin6 = (struct sockaddr_in6 *)nam;
1880 break;
1881 #endif
1882 #if defined(__Userspace__)
1883 case AF_CONN:
1884 sconn = (struct sockaddr_conn *)nam;
1885 break;
1886 #endif
1887 default:
1888 /* unsupported family */
1889 return (NULL);
1890 }
1892 if (head == NULL)
1893 return (NULL);
1895 LIST_FOREACH(inp, head, sctp_hash) {
1896 SCTP_INP_RLOCK(inp);
1897 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1898 SCTP_INP_RUNLOCK(inp);
1899 continue;
1900 }
1901 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1902 (inp->sctp_lport == lport)) {
1903 /* got it */
1904 #ifdef INET
1905 if ((nam->sa_family == AF_INET) &&
1906 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1907 SCTP_IPV6_V6ONLY(inp)) {
1908 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1909 SCTP_INP_RUNLOCK(inp);
1910 continue;
1911 }
1912 #endif
1913 #ifdef INET6
1914 /* A V6 address and the endpoint is NOT bound V6 */
1915 if (nam->sa_family == AF_INET6 &&
1916 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1917 SCTP_INP_RUNLOCK(inp);
1918 continue;
1919 }
1920 #endif
1921 /* does a VRF id match? */
1922 fnd = 0;
1923 #ifdef SCTP_MVRF
1924 for (i = 0; i < inp->num_vrfs; i++) {
1925 if (inp->m_vrf_ids[i] == vrf_id) {
1926 fnd = 1;
1927 break;
1928 }
1929 }
1930 #else
1931 if (inp->def_vrf_id == vrf_id)
1932 fnd = 1;
1933 #endif
1935 SCTP_INP_RUNLOCK(inp);
1936 if (!fnd)
1937 continue;
1938 return (inp);
1939 }
1940 SCTP_INP_RUNLOCK(inp);
1941 }
1942 switch (nam->sa_family) {
1943 #ifdef INET
1944 case AF_INET:
1945 if (sin->sin_addr.s_addr == INADDR_ANY) {
1946 /* Can't hunt for one that has no address specified */
1947 return (NULL);
1948 }
1949 break;
1950 #endif
1951 #ifdef INET6
1952 case AF_INET6:
1953 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1954 /* Can't hunt for one that has no address specified */
1955 return (NULL);
1956 }
1957 break;
1958 #endif
1959 #if defined(__Userspace__)
1960 case AF_CONN:
1961 if (sconn->sconn_addr == NULL) {
1962 return (NULL);
1963 }
1964 break;
1965 #endif
1966 default:
1967 break;
1968 }
1969 /*
1970 * ok, not bound to all so see if we can find a EP bound to this
1971 * address.
1972 */
1973 LIST_FOREACH(inp, head, sctp_hash) {
1974 SCTP_INP_RLOCK(inp);
1975 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1976 SCTP_INP_RUNLOCK(inp);
1977 continue;
1978 }
1979 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1980 SCTP_INP_RUNLOCK(inp);
1981 continue;
1982 }
1983 /*
1984 * Ok this could be a likely candidate, look at all of its
1985 * addresses
1986 */
1987 if (inp->sctp_lport != lport) {
1988 SCTP_INP_RUNLOCK(inp);
1989 continue;
1990 }
1991 /* does a VRF id match? */
1992 fnd = 0;
1993 #ifdef SCTP_MVRF
1994 for (i = 0; i < inp->num_vrfs; i++) {
1995 if (inp->m_vrf_ids[i] == vrf_id) {
1996 fnd = 1;
1997 break;
1998 }
1999 }
2000 #else
2001 if (inp->def_vrf_id == vrf_id)
2002 fnd = 1;
2004 #endif
2005 if (!fnd) {
2006 SCTP_INP_RUNLOCK(inp);
2007 continue;
2008 }
2009 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2010 if (laddr->ifa == NULL) {
2011 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
2012 __FUNCTION__);
2013 continue;
2014 }
2015 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
2016 (void *)laddr->ifa);
2017 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2018 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
2019 continue;
2020 }
2021 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
2022 /* possible, see if it matches */
2023 switch (nam->sa_family) {
2024 #ifdef INET
2025 case AF_INET:
2026 #if defined(__APPLE__)
2027 if (sin == NULL) {
2028 /* TSNH */
2029 break;
2030 }
2031 #endif
2032 if (sin->sin_addr.s_addr ==
2033 laddr->ifa->address.sin.sin_addr.s_addr) {
2034 SCTP_INP_RUNLOCK(inp);
2035 return (inp);
2036 }
2037 break;
2038 #endif
2039 #ifdef INET6
2040 case AF_INET6:
2041 intf_addr6 = &laddr->ifa->address.sin6;
2042 if (SCTP6_ARE_ADDR_EQUAL(sin6,
2043 intf_addr6)) {
2044 SCTP_INP_RUNLOCK(inp);
2045 return (inp);
2046 }
2047 break;
2048 #endif
2049 #if defined(__Userspace__)
2050 case AF_CONN:
2051 if (sconn->sconn_addr == laddr->ifa->address.sconn.sconn_addr) {
2052 SCTP_INP_RUNLOCK(inp);
2053 return (inp);
2054 }
2055 break;
2056 #endif
2057 }
2058 }
2059 }
2060 SCTP_INP_RUNLOCK(inp);
2061 }
2062 return (NULL);
2063 }
2066 static struct sctp_inpcb *
2067 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2068 {
2069 struct sctppcbhead *head;
2070 struct sctp_inpcb *t_inp;
2071 #ifdef SCTP_MVRF
2072 int i;
2073 #endif
2074 int fnd;
2076 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2077 SCTP_BASE_INFO(hashmark))];
2078 LIST_FOREACH(t_inp, head, sctp_hash) {
2079 if (t_inp->sctp_lport != lport) {
2080 continue;
2081 }
2082 /* is it in the VRF in question */
2083 fnd = 0;
2084 #ifdef SCTP_MVRF
2085 for (i = 0; i < inp->num_vrfs; i++) {
2086 if (t_inp->m_vrf_ids[i] == vrf_id) {
2087 fnd = 1;
2088 break;
2089 }
2090 }
2091 #else
2092 if (t_inp->def_vrf_id == vrf_id)
2093 fnd = 1;
2094 #endif
2095 if (!fnd)
2096 continue;
2098 /* This one is in use. */
2099 /* check the v6/v4 binding issue */
2100 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2101 SCTP_IPV6_V6ONLY(t_inp)) {
2102 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2103 /* collision in V6 space */
2104 return (t_inp);
2105 } else {
2106 /* inp is BOUND_V4 no conflict */
2107 continue;
2108 }
2109 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2110 /* t_inp is bound v4 and v6, conflict always */
2111 return (t_inp);
2112 } else {
2113 /* t_inp is bound only V4 */
2114 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2115 SCTP_IPV6_V6ONLY(inp)) {
2116 /* no conflict */
2117 continue;
2118 }
2119 /* else fall through to conflict */
2120 }
2121 return (t_inp);
2122 }
2123 return (NULL);
2124 }
2127 int
2128 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
2129 {
2130 /* For 1-2-1 with port reuse */
2131 struct sctppcbhead *head;
2132 struct sctp_inpcb *tinp;
2134 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
2135 /* only works with port reuse on */
2136 return (-1);
2137 }
2138 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
2139 return (0);
2140 }
2141 SCTP_INP_RUNLOCK(inp);
2142 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
2143 SCTP_BASE_INFO(hashmark))];
2144 /* Kick out all non-listeners to the TCP hash */
2145 LIST_FOREACH(tinp, head, sctp_hash) {
2146 if (tinp->sctp_lport != inp->sctp_lport) {
2147 continue;
2148 }
2149 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2150 continue;
2151 }
2152 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2153 continue;
2154 }
2155 if (tinp->sctp_socket->so_qlimit) {
2156 continue;
2157 }
2158 SCTP_INP_WLOCK(tinp);
2159 LIST_REMOVE(tinp, sctp_hash);
2160 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
2161 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
2162 LIST_INSERT_HEAD(head, tinp, sctp_hash);
2163 SCTP_INP_WUNLOCK(tinp);
2164 }
2165 SCTP_INP_WLOCK(inp);
2166 /* Pull from where he was */
2167 LIST_REMOVE(inp, sctp_hash);
2168 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
2169 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
2170 LIST_INSERT_HEAD(head, inp, sctp_hash);
2171 SCTP_INP_WUNLOCK(inp);
2172 SCTP_INP_RLOCK(inp);
2173 return (0);
2174 }
2177 struct sctp_inpcb *
2178 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
2179 uint32_t vrf_id)
2180 {
2181 /*
2182 * First we check the hash table to see if someone has this port
2183 * bound with just the port.
2184 */
2185 struct sctp_inpcb *inp;
2186 struct sctppcbhead *head;
2187 int lport;
2188 unsigned int i;
2189 #ifdef INET
2190 struct sockaddr_in *sin;
2191 #endif
2192 #ifdef INET6
2193 struct sockaddr_in6 *sin6;
2194 #endif
2195 #if defined(__Userspace__)
2196 struct sockaddr_conn *sconn;
2197 #endif
2199 switch (nam->sa_family) {
2200 #ifdef INET
2201 case AF_INET:
2202 sin = (struct sockaddr_in *)nam;
2203 lport = sin->sin_port;
2204 break;
2205 #endif
2206 #ifdef INET6
2207 case AF_INET6:
2208 sin6 = (struct sockaddr_in6 *)nam;
2209 lport = sin6->sin6_port;
2210 break;
2211 #endif
2212 #if defined(__Userspace__)
2213 case AF_CONN:
2214 sconn = (struct sockaddr_conn *)nam;
2215 lport = sconn->sconn_port;
2216 break;
2217 #endif
2218 default:
2219 return (NULL);
2220 }
2221 /*
2222 * I could cheat here and just cast to one of the types but we will
2223 * do it right. It also provides the check against an Unsupported
2224 * type too.
2225 */
2226 /* Find the head of the ALLADDR chain */
2227 if (have_lock == 0) {
2228 SCTP_INP_INFO_RLOCK();
2229 }
2230 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2231 SCTP_BASE_INFO(hashmark))];
2232 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2234 /*
2235 * If the TCP model exists it could be that the main listening
2236 * endpoint is gone but there still exists a connected socket for this
2237 * guy. If so we can return the first one that we find. This may NOT
2238 * be the correct one so the caller should be wary on the returned INP.
2239 * Currently the only caller that sets find_tcp_pool is in bindx where
2240 * we are verifying that a user CAN bind the address. He either
2241 * has bound it already, or someone else has, or its open to bind,
2242 * so this is good enough.
2243 */
2244 if (inp == NULL && find_tcp_pool) {
2245 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
2246 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
2247 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
2248 if (inp) {
2249 break;
2250 }
2251 }
2252 }
2253 if (inp) {
2254 SCTP_INP_INCR_REF(inp);
2255 }
2256 if (have_lock == 0) {
2257 SCTP_INP_INFO_RUNLOCK();
2258 }
2259 return (inp);
2260 }
2263 /*
2264 * Find an association for an endpoint with the pointer to whom you want to
2265 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2266 * need to change the *to to some other struct like a mbuf...
2267 */
2268 struct sctp_tcb *
2269 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2270 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2271 uint32_t vrf_id)
2272 {
2273 struct sctp_inpcb *inp = NULL;
2274 struct sctp_tcb *stcb;
2276 SCTP_INP_INFO_RLOCK();
2277 if (find_tcp_pool) {
2278 if (inp_p != NULL) {
2279 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2280 vrf_id);
2281 } else {
2282 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2283 vrf_id);
2284 }
2285 if (stcb != NULL) {
2286 SCTP_INP_INFO_RUNLOCK();
2287 return (stcb);
2288 }
2289 }
2290 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2291 if (inp_p != NULL) {
2292 *inp_p = inp;
2293 }
2294 SCTP_INP_INFO_RUNLOCK();
2295 if (inp == NULL) {
2296 return (NULL);
2297 }
2298 /*
2299 * ok, we have an endpoint, now lets find the assoc for it (if any)
2300 * we now place the source address or from in the to of the find
2301 * endpoint call. Since in reality this chain is used from the
2302 * inbound packet side.
2303 */
2304 if (inp_p != NULL) {
2305 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2306 NULL);
2307 } else {
2308 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2309 NULL);
2310 }
2311 return (stcb);
2312 }
2315 /*
2316 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2317 * find all addresses that the sender has specified in any address list. Each
2318 * address will be used to lookup the TCB and see if one exits.
2319 */
2320 static struct sctp_tcb *
2321 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2322 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2323 struct sockaddr *dst)
2324 {
2325 struct sctp_paramhdr *phdr, parm_buf;
2326 #if defined(INET) || defined(INET6)
2327 struct sctp_tcb *stcb;
2328 uint16_t ptype;
2329 #endif
2330 uint16_t plen;
2331 #ifdef INET
2332 struct sockaddr_in sin4;
2333 #endif
2334 #ifdef INET6
2335 struct sockaddr_in6 sin6;
2336 #endif
2338 #ifdef INET
2339 memset(&sin4, 0, sizeof(sin4));
2340 #ifdef HAVE_SIN_LEN
2341 sin4.sin_len = sizeof(sin4);
2342 #endif
2343 sin4.sin_family = AF_INET;
2344 sin4.sin_port = sh->src_port;
2345 #endif
2346 #ifdef INET6
2347 memset(&sin6, 0, sizeof(sin6));
2348 #ifdef HAVE_SIN6_LEN
2349 sin6.sin6_len = sizeof(sin6);
2350 #endif
2351 sin6.sin6_family = AF_INET6;
2352 sin6.sin6_port = sh->src_port;
2353 #endif
2355 offset += sizeof(struct sctp_init_chunk);
2357 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2358 while (phdr != NULL) {
2359 /* now we must see if we want the parameter */
2360 #if defined(INET) || defined(INET6)
2361 ptype = ntohs(phdr->param_type);
2362 #endif
2363 plen = ntohs(phdr->param_length);
2364 if (plen == 0) {
2365 break;
2366 }
2367 #ifdef INET
2368 if (ptype == SCTP_IPV4_ADDRESS &&
2369 plen == sizeof(struct sctp_ipv4addr_param)) {
2370 /* Get the rest of the address */
2371 struct sctp_ipv4addr_param ip4_parm, *p4;
2373 phdr = sctp_get_next_param(m, offset,
2374 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2375 if (phdr == NULL) {
2376 return (NULL);
2377 }
2378 p4 = (struct sctp_ipv4addr_param *)phdr;
2379 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2380 /* look it up */
2381 stcb = sctp_findassociation_ep_addr(inp_p,
2382 (struct sockaddr *)&sin4, netp, dst, NULL);
2383 if (stcb != NULL) {
2384 return (stcb);
2385 }
2386 }
2387 #endif
2388 #ifdef INET6
2389 if (ptype == SCTP_IPV6_ADDRESS &&
2390 plen == sizeof(struct sctp_ipv6addr_param)) {
2391 /* Get the rest of the address */
2392 struct sctp_ipv6addr_param ip6_parm, *p6;
2394 phdr = sctp_get_next_param(m, offset,
2395 (struct sctp_paramhdr *)&ip6_parm, min(plen,sizeof(ip6_parm)));
2396 if (phdr == NULL) {
2397 return (NULL);
2398 }
2399 p6 = (struct sctp_ipv6addr_param *)phdr;
2400 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2401 /* look it up */
2402 stcb = sctp_findassociation_ep_addr(inp_p,
2403 (struct sockaddr *)&sin6, netp, dst, NULL);
2404 if (stcb != NULL) {
2405 return (stcb);
2406 }
2407 }
2408 #endif
2409 offset += SCTP_SIZE32(plen);
2410 phdr = sctp_get_next_param(m, offset, &parm_buf,
2411 sizeof(parm_buf));
2412 }
2413 return (NULL);
2414 }
2416 static struct sctp_tcb *
2417 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2418 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2419 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2420 {
2421 /*
2422 * Use my vtag to hash. If we find it we then verify the source addr
2423 * is in the assoc. If all goes well we save a bit on rec of a
2424 * packet.
2425 */
2426 struct sctpasochead *head;
2427 struct sctp_nets *net;
2428 struct sctp_tcb *stcb;
2429 #ifdef SCTP_MVRF
2430 unsigned int i;
2431 #endif
2433 SCTP_INP_INFO_RLOCK();
2434 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2435 SCTP_BASE_INFO(hashasocmark))];
2436 if (head == NULL) {
2437 /* invalid vtag */
2438 SCTP_INP_INFO_RUNLOCK();
2439 return (NULL);
2440 }
2441 LIST_FOREACH(stcb, head, sctp_asocs) {
2442 SCTP_INP_RLOCK(stcb->sctp_ep);
2443 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2444 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2445 continue;
2446 }
2447 #ifdef SCTP_MVRF
2448 for (i = 0; i < stcb->sctp_ep->num_vrfs; i++) {
2449 if (stcb->sctp_ep->m_vrf_ids[i] == vrf_id) {
2450 break;
2451 }
2452 }
2453 if (i == stcb->sctp_ep->num_vrfs) {
2454 SCTP_INP_RUNLOCK(inp);
2455 continue;
2456 }
2457 #else
2458 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2459 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2460 continue;
2461 }
2462 #endif
2463 SCTP_TCB_LOCK(stcb);
2464 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2465 if (stcb->asoc.my_vtag == vtag) {
2466 /* candidate */
2467 if (stcb->rport != rport) {
2468 SCTP_TCB_UNLOCK(stcb);
2469 continue;
2470 }
2471 if (stcb->sctp_ep->sctp_lport != lport) {
2472 SCTP_TCB_UNLOCK(stcb);
2473 continue;
2474 }
2475 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2476 SCTP_TCB_UNLOCK(stcb);
2477 continue;
2478 }
2479 /* RRS:Need toaddr check here */
2480 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2481 /* Endpoint does not own this address */
2482 SCTP_TCB_UNLOCK(stcb);
2483 continue;
2484 }
2485 if (remote_tag) {
2486 /* If we have both vtags that's all we match on */
2487 if (stcb->asoc.peer_vtag == remote_tag) {
2488 /* If both tags match we consider it conclusive
2489 * and check NO source/destination addresses
2490 */
2491 goto conclusive;
2492 }
2493 }
2494 if (skip_src_check) {
2495 conclusive:
2496 if (from) {
2497 *netp = sctp_findnet(stcb, from);
2498 } else {
2499 *netp = NULL; /* unknown */
2500 }
2501 if (inp_p)
2502 *inp_p = stcb->sctp_ep;
2503 SCTP_INP_INFO_RUNLOCK();
2504 return (stcb);
2505 }
2506 net = sctp_findnet(stcb, from);
2507 if (net) {
2508 /* yep its him. */
2509 *netp = net;
2510 SCTP_STAT_INCR(sctps_vtagexpress);
2511 *inp_p = stcb->sctp_ep;
2512 SCTP_INP_INFO_RUNLOCK();
2513 return (stcb);
2514 } else {
2515 /*
2516 * not him, this should only happen in rare
2517 * cases so I peg it.
2518 */
2519 SCTP_STAT_INCR(sctps_vtagbogus);
2520 }
2521 }
2522 SCTP_TCB_UNLOCK(stcb);
2523 }
2524 SCTP_INP_INFO_RUNLOCK();
2525 return (NULL);
2526 }
2529 /*
2530 * Find an association with the pointer to the inbound IP packet. This can be
2531 * a IPv4 or IPv6 packet.
2532 */
2533 struct sctp_tcb *
2534 sctp_findassociation_addr(struct mbuf *m, int offset,
2535 struct sockaddr *src, struct sockaddr *dst,
2536 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2537 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2538 {
2539 int find_tcp_pool;
2540 struct sctp_tcb *stcb;
2541 struct sctp_inpcb *inp;
2543 if (sh->v_tag) {
2544 /* we only go down this path if vtag is non-zero */
2545 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2546 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2547 if (stcb) {
2548 return (stcb);
2549 }
2550 }
2552 find_tcp_pool = 0;
2553 if ((ch->chunk_type != SCTP_INITIATION) &&
2554 (ch->chunk_type != SCTP_INITIATION_ACK) &&
2555 (ch->chunk_type != SCTP_COOKIE_ACK) &&
2556 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2557 /* Other chunk types go to the tcp pool. */
2558 find_tcp_pool = 1;
2559 }
2560 if (inp_p) {
2561 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2562 find_tcp_pool, vrf_id);
2563 inp = *inp_p;
2564 } else {
2565 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2566 find_tcp_pool, vrf_id);
2567 }
2568 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2569 if (stcb == NULL && inp) {
2570 /* Found a EP but not this address */
2571 if ((ch->chunk_type == SCTP_INITIATION) ||
2572 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2573 /*-
2574 * special hook, we do NOT return linp or an
2575 * association that is linked to an existing
2576 * association that is under the TCP pool (i.e. no
2577 * listener exists). The endpoint finding routine
2578 * will always find a listener before examining the
2579 * TCP pool.
2580 */
2581 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2582 if (inp_p) {
2583 *inp_p = NULL;
2584 }
2585 return (NULL);
2586 }
2587 stcb = sctp_findassociation_special_addr(m,
2588 offset, sh, &inp, netp, dst);
2589 if (inp_p != NULL) {
2590 *inp_p = inp;
2591 }
2592 }
2593 }
2594 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2595 return (stcb);
2596 }
2598 /*
2599 * lookup an association by an ASCONF lookup address.
2600 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2601 */
2602 struct sctp_tcb *
2603 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2604 struct sockaddr *dst, struct sctphdr *sh,
2605 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2606 {
2607 struct sctp_tcb *stcb;
2608 struct sockaddr_storage remote_store;
2609 struct sctp_paramhdr parm_buf, *phdr;
2610 int ptype;
2611 int zero_address = 0;
2612 #ifdef INET
2613 struct sockaddr_in *sin;
2614 #endif
2615 #ifdef INET6
2616 struct sockaddr_in6 *sin6;
2617 #endif
2619 memset(&remote_store, 0, sizeof(remote_store));
2620 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2621 &parm_buf, sizeof(struct sctp_paramhdr));
2622 if (phdr == NULL) {
2623 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2624 __FUNCTION__);
2625 return NULL;
2626 }
2627 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2628 /* get the correlation address */
2629 switch (ptype) {
2630 #ifdef INET6
2631 case SCTP_IPV6_ADDRESS:
2632 {
2633 /* ipv6 address param */
2634 struct sctp_ipv6addr_param *p6, p6_buf;
2636 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2637 return NULL;
2638 }
2639 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2640 offset + sizeof(struct sctp_asconf_chunk),
2641 &p6_buf.ph, sizeof(*p6));
2642 if (p6 == NULL) {
2643 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2644 __FUNCTION__);
2645 return (NULL);
2646 }
2647 sin6 = (struct sockaddr_in6 *)&remote_store;
2648 sin6->sin6_family = AF_INET6;
2649 #ifdef HAVE_SIN6_LEN
2650 sin6->sin6_len = sizeof(*sin6);
2651 #endif
2652 sin6->sin6_port = sh->src_port;
2653 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2654 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2655 zero_address = 1;
2656 break;
2657 }
2658 #endif
2659 #ifdef INET
2660 case SCTP_IPV4_ADDRESS:
2661 {
2662 /* ipv4 address param */
2663 struct sctp_ipv4addr_param *p4, p4_buf;
2665 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2666 return NULL;
2667 }
2668 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2669 offset + sizeof(struct sctp_asconf_chunk),
2670 &p4_buf.ph, sizeof(*p4));
2671 if (p4 == NULL) {
2672 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2673 __FUNCTION__);
2674 return (NULL);
2675 }
2676 sin = (struct sockaddr_in *)&remote_store;
2677 sin->sin_family = AF_INET;
2678 #ifdef HAVE_SIN_LEN
2679 sin->sin_len = sizeof(*sin);
2680 #endif
2681 sin->sin_port = sh->src_port;
2682 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2683 if (sin->sin_addr.s_addr == INADDR_ANY)
2684 zero_address = 1;
2685 break;
2686 }
2687 #endif
2688 default:
2689 /* invalid address param type */
2690 return NULL;
2691 }
2693 if (zero_address) {
2694 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2695 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2696 if (stcb != NULL) {
2697 SCTP_INP_DECR_REF(*inp_p);
2698 }
2699 } else {
2700 stcb = sctp_findassociation_ep_addr(inp_p,
2701 (struct sockaddr *)&remote_store, netp,
2702 dst, NULL);
2703 }
2704 return (stcb);
2705 }
2708 /*
2709 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2710 * addresses. This way if we don't get a bind we by default pick a ephemeral
2711 * port with all addresses bound.
2712 */
2713 int
2714 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2715 {
2716 /*
2717 * we get called when a new endpoint starts up. We need to allocate
2718 * the sctp_inpcb structure from the zone and init it. Mark it as
2719 * unbound and find a port that we can use as an ephemeral with
2720 * INADDR_ANY. If the user binds later no problem we can then add in
2721 * the specific addresses. And setup the default parameters for the
2722 * EP.
2723 */
2724 int i, error;
2725 struct sctp_inpcb *inp;
2726 struct sctp_pcb *m;
2727 struct timeval time;
2728 sctp_sharedkey_t *null_key;
2730 error = 0;
2732 SCTP_INP_INFO_WLOCK();
2733 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2734 if (inp == NULL) {
2735 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2736 SCTP_INP_INFO_WUNLOCK();
2737 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2738 return (ENOBUFS);
2739 }
2740 /* zap it */
2741 bzero(inp, sizeof(*inp));
2743 /* bump generations */
2744 #if defined(__APPLE__)
2745 inp->ip_inp.inp.inp_state = INPCB_STATE_INUSE;
2746 #endif
2747 /* setup socket pointers */
2748 inp->sctp_socket = so;
2749 inp->ip_inp.inp.inp_socket = so;
2750 #ifdef INET6
2751 #if !defined(__Userspace__) && !defined(__Windows__)
2752 if (INP_SOCKAF(so) == AF_INET6) {
2753 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2754 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2755 }
2756 if (MODULE_GLOBAL(ip6_v6only)) {
2757 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2758 }
2759 }
2760 #endif
2761 #endif
2762 inp->sctp_associd_counter = 1;
2763 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2764 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2765 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2766 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2767 #if defined(__Userspace__)
2768 inp->ulp_info = NULL;
2769 inp->recv_callback = NULL;
2770 inp->send_callback = NULL;
2771 inp->send_sb_threshold = 0;
2772 #endif
2773 /* init the small hash table we use to track asocid <-> tcb */
2774 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2775 if (inp->sctp_asocidhash == NULL) {
2776 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2777 SCTP_INP_INFO_WUNLOCK();
2778 return (ENOBUFS);
2779 }
2780 #ifdef IPSEC
2781 #if !(defined(__APPLE__))
2782 {
2783 struct inpcbpolicy *pcb_sp = NULL;
2785 error = ipsec_init_policy(so, &pcb_sp);
2786 /* Arrange to share the policy */
2787 inp->ip_inp.inp.inp_sp = pcb_sp;
2788 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2789 }
2790 #else
2791 /* not sure what to do for openbsd here */
2792 error = 0;
2793 #endif
2794 if (error != 0) {
2795 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2796 SCTP_INP_INFO_WUNLOCK();
2797 return error;
2798 }
2799 #endif /* IPSEC */
2800 SCTP_INCR_EP_COUNT();
2801 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2802 SCTP_INP_INFO_WUNLOCK();
2804 so->so_pcb = (caddr_t)inp;
2806 #if defined(__FreeBSD__) && __FreeBSD_version < 803000
2807 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2808 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2809 #else
2810 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2811 #endif
2812 /* UDP style socket */
2813 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2814 SCTP_PCB_FLAGS_UNBOUND);
2815 /* Be sure it is NON-BLOCKING IO for UDP */
2816 /* SCTP_SET_SO_NBIO(so); */
2817 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2818 /* TCP style socket */
2819 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2820 SCTP_PCB_FLAGS_UNBOUND);
2821 /* Be sure we have blocking IO by default */
2822 SCTP_CLEAR_SO_NBIO(so);
2823 #if defined(__Panda__)
2824 } else if (SCTP_SO_TYPE(so) == SOCK_FASTSEQPACKET) {
2825 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2826 SCTP_PCB_FLAGS_UNBOUND);
2827 sctp_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE);
2828 } else if (SCTP_SO_TYPE(so) == SOCK_FASTSTREAM) {
2829 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2830 SCTP_PCB_FLAGS_UNBOUND);
2831 sctp_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE);
2832 #endif
2833 } else {
2834 /*
2835 * unsupported socket type (RAW, etc)- in case we missed it
2836 * in protosw
2837 */
2838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2839 so->so_pcb = NULL;
2840 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2841 return (EOPNOTSUPP);
2842 }
2843 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2844 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2845 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2846 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2847 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2848 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2849 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2850 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2851 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2852 }
2853 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2854 &inp->sctp_hashmark);
2855 if (inp->sctp_tcbhash == NULL) {
2856 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2858 so->so_pcb = NULL;
2859 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2860 return (ENOBUFS);
2861 }
2862 #ifdef SCTP_MVRF
2863 inp->vrf_size = SCTP_DEFAULT_VRF_SIZE;
2864 SCTP_MALLOC(inp->m_vrf_ids, uint32_t *,
2865 (sizeof(uint32_t) * inp->vrf_size), SCTP_M_MVRF);
2866 if (inp->m_vrf_ids == NULL) {
2867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2868 so->so_pcb = NULL;
2869 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2870 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2871 return (ENOBUFS);
2872 }
2873 inp->m_vrf_ids[0] = vrf_id;
2874 inp->num_vrfs = 1;
2875 #endif
2876 inp->def_vrf_id = vrf_id;
2878 #if defined(__APPLE__)
2879 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
2880 inp->ip_inp.inp.inpcb_mtx = lck_mtx_alloc_init(SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2881 if (inp->ip_inp.inp.inpcb_mtx == NULL) {
2882 SCTP_PRINTF("in_pcballoc: can't alloc mutex! so=%p\n", (void *)so);
2883 #ifdef SCTP_MVRF
2884 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
2885 #endif
2886 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2887 so->so_pcb = NULL;
2888 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2889 SCTP_UNLOCK_EXC(SCTP_BASE_INFO(sctbinfo).ipi_lock);
2890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
2891 return (ENOMEM);
2892 }
2893 #elif defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2894 lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr);
2895 #else
2896 lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).ipi_lock_grp, SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
2897 #endif
2898 #endif
2899 SCTP_INP_INFO_WLOCK();
2900 SCTP_INP_LOCK_INIT(inp);
2901 #if defined(__FreeBSD__)
2902 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2903 #endif
2904 SCTP_INP_READ_INIT(inp);
2905 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2906 /* lock the new ep */
2907 SCTP_INP_WLOCK(inp);
2909 /* add it to the info area */
2910 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2911 #if defined(__APPLE__)
2912 inp->ip_inp.inp.inp_pcbinfo = &SCTP_BASE_INFO(sctbinfo);
2913 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
2914 LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).listhead, &inp->ip_inp.inp, inp_list);
2915 #else
2916 LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).ipi_listhead, &inp->ip_inp.inp, inp_list);
2917 #endif
2918 #endif
2919 SCTP_INP_INFO_WUNLOCK();
2921 TAILQ_INIT(&inp->read_queue);
2922 LIST_INIT(&inp->sctp_addr_list);
2924 LIST_INIT(&inp->sctp_asoc_list);
2926 #ifdef SCTP_TRACK_FREED_ASOCS
2927 /* TEMP CODE */
2928 LIST_INIT(&inp->sctp_asoc_free_list);
2929 #endif
2930 /* Init the timer structure for signature change */
2931 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2932 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2934 /* now init the actual endpoint default data */
2935 m = &inp->sctp_ep;
2937 /* setup the base timeout information */
2938 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
2939 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
2940 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2941 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2942 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2943 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2944 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2945 /* all max/min max are in ms */
2946 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2947 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2948 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2949 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2950 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2951 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2952 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2953 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2954 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2955 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2956 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2957 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2958 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2960 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2961 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2962 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2963 /* number of streams to pre-open on a association */
2964 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2966 /* Add adaptation cookie */
2967 m->adaptation_layer_indicator = 0;
2968 m->adaptation_layer_indicator_provided = 0;
2970 /* seed random number generator */
2971 m->random_counter = 1;
2972 m->store_at = SCTP_SIGNATURE_SIZE;
2973 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2974 sctp_fill_random_store(m);
2976 /* Minimum cookie size */
2977 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2978 sizeof(struct sctp_state_cookie);
2979 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2981 /* Setup the initial secret */
2982 (void)SCTP_GETTIME_TIMEVAL(&time);
2983 m->time_of_secret_change = time.tv_sec;
2985 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2986 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2987 }
2988 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2990 /* How long is a cookie good for ? */
2991 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2992 /*
2993 * Initialize authentication parameters
2994 */
2995 m->local_hmacs = sctp_default_supported_hmaclist();
2996 m->local_auth_chunks = sctp_alloc_chunklist();
2997 m->default_dscp = 0;
2998 #ifdef INET6
2999 m->default_flowlabel = 0;
3000 #endif
3001 m->port = 0; /* encapsulation disabled by default */
3002 sctp_auth_set_default_chunks(m->local_auth_chunks);
3003 LIST_INIT(&m->shared_keys);
3004 /* add default NULL key as key id 0 */
3005 null_key = sctp_alloc_sharedkey();
3006 sctp_insert_sharedkey(&m->shared_keys, null_key);
3007 SCTP_INP_WUNLOCK(inp);
3008 #ifdef SCTP_LOG_CLOSING
3009 sctp_log_closing(inp, NULL, 12);
3010 #endif
3011 return (error);
3012 }
3015 void
3016 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
3017 struct sctp_tcb *stcb)
3018 {
3019 struct sctp_nets *net;
3020 uint16_t lport, rport;
3021 struct sctppcbhead *head;
3022 struct sctp_laddr *laddr, *oladdr;
3024 atomic_add_int(&stcb->asoc.refcnt, 1);
3025 SCTP_TCB_UNLOCK(stcb);
3026 SCTP_INP_INFO_WLOCK();
3027 SCTP_INP_WLOCK(old_inp);
3028 SCTP_INP_WLOCK(new_inp);
3029 SCTP_TCB_LOCK(stcb);
3030 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3032 new_inp->sctp_ep.time_of_secret_change =
3033 old_inp->sctp_ep.time_of_secret_change;
3034 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
3035 sizeof(old_inp->sctp_ep.secret_key));
3036 new_inp->sctp_ep.current_secret_number =
3037 old_inp->sctp_ep.current_secret_number;
3038 new_inp->sctp_ep.last_secret_number =
3039 old_inp->sctp_ep.last_secret_number;
3040 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
3042 /* make it so new data pours into the new socket */
3043 stcb->sctp_socket = new_inp->sctp_socket;
3044 stcb->sctp_ep = new_inp;
3046 /* Copy the port across */
3047 lport = new_inp->sctp_lport = old_inp->sctp_lport;
3048 rport = stcb->rport;
3049 /* Pull the tcb from the old association */
3050 LIST_REMOVE(stcb, sctp_tcbhash);
3051 LIST_REMOVE(stcb, sctp_tcblist);
3052 if (stcb->asoc.in_asocid_hash) {
3053 LIST_REMOVE(stcb, sctp_tcbasocidhash);
3054 }
3055 /* Now insert the new_inp into the TCP connected hash */
3056 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
3058 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
3059 /* Its safe to access */
3060 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3062 /* Now move the tcb into the endpoint list */
3063 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
3064 /*
3065 * Question, do we even need to worry about the ep-hash since we
3066 * only have one connection? Probably not :> so lets get rid of it
3067 * and not suck up any kernel memory in that.
3068 */
3069 if (stcb->asoc.in_asocid_hash) {
3070 struct sctpasochead *lhd;
3071 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
3072 new_inp->hashasocidmark)];
3073 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
3074 }
3075 /* Ok. Let's restart timer. */
3076 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3077 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
3078 stcb, net);
3079 }
3081 SCTP_INP_INFO_WUNLOCK();
3082 if (new_inp->sctp_tcbhash != NULL) {
3083 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
3084 new_inp->sctp_tcbhash = NULL;
3085 }
3086 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
3087 /* Subset bound, so copy in the laddr list from the old_inp */
3088 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
3089 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
3090 if (laddr == NULL) {
3091 /*
3092 * Gak, what can we do? This assoc is really
3093 * HOSED. We probably should send an abort
3094 * here.
3095 */
3096 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
3097 continue;
3098 }
3099 SCTP_INCR_LADDR_COUNT();
3100 bzero(laddr, sizeof(*laddr));
3101 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
3102 laddr->ifa = oladdr->ifa;
3103 atomic_add_int(&laddr->ifa->refcount, 1);
3104 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
3105 sctp_nxt_addr);
3106 new_inp->laddr_count++;
3107 if (oladdr == stcb->asoc.last_used_address) {
3108 stcb->asoc.last_used_address = laddr;
3109 }
3110 }
3111 }
3112 /* Now any running timers need to be adjusted
3113 * since we really don't care if they are running
3114 * or not just blast in the new_inp into all of
3115 * them.
3116 */
3118 stcb->asoc.dack_timer.ep = (void *)new_inp;
3119 stcb->asoc.asconf_timer.ep = (void *)new_inp;
3120 stcb->asoc.strreset_timer.ep = (void *)new_inp;
3121 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
3122 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
3123 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
3124 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
3125 /* now what about the nets? */
3126 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3127 net->pmtu_timer.ep = (void *)new_inp;
3128 net->hb_timer.ep = (void *)new_inp;
3129 net->rxt_timer.ep = (void *)new_inp;
3130 }
3131 SCTP_INP_WUNLOCK(new_inp);
3132 SCTP_INP_WUNLOCK(old_inp);
3133 }
3136 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__))
3137 /*
3138 * Don't know why, but without this there is an unknown reference when
3139 * compiling NetBSD... hmm
3140 */
3141 extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *sin6);
3142 #endif
3145 /* sctp_ifap is used to bypass normal local address validation checks */
3146 int
3147 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3148 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3149 struct sctp_ifa *sctp_ifap, struct thread *p)
3150 #elif defined(__Windows__)
3151 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3152 struct sctp_ifa *sctp_ifap, PKTHREAD p)
3153 #else
3154 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3155 struct sctp_ifa *sctp_ifap, struct proc *p)
3156 #endif
3157 {
3158 /* bind a ep to a socket address */
3159 struct sctppcbhead *head;
3160 struct sctp_inpcb *inp, *inp_tmp;
3161 #if defined(INET) || (defined(INET6) && defined(__APPLE__)) || defined(__FreeBSD__) || defined(__APPLE__)
3162 struct inpcb *ip_inp;
3163 #endif
3164 int port_reuse_active = 0;
3165 int bindall;
3166 #ifdef SCTP_MVRF
3167 int i;
3168 #endif
3169 uint16_t lport;
3170 int error;
3171 uint32_t vrf_id;
3173 lport = 0;
3174 error = 0;
3175 bindall = 1;
3176 inp = (struct sctp_inpcb *)so->so_pcb;
3177 #if defined(INET) || (defined(INET6) && defined(__APPLE__)) || defined(__FreeBSD__) || defined(__APPLE__)
3178 ip_inp = (struct inpcb *)so->so_pcb;
3179 #endif
3180 #ifdef SCTP_DEBUG
3181 if (addr) {
3182 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
3183 ntohs(((struct sockaddr_in *)addr)->sin_port));
3184 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
3185 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
3186 }
3187 #endif
3188 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3189 /* already did a bind, subsequent binds NOT allowed ! */
3190 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3191 return (EINVAL);
3192 }
3193 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
3194 #ifdef INVARIANTS
3195 if (p == NULL)
3196 panic("null proc/thread");
3197 #endif
3198 #endif
3199 if (addr != NULL) {
3200 switch (addr->sa_family) {
3201 #ifdef INET
3202 case AF_INET:
3203 {
3204 struct sockaddr_in *sin;
3206 /* IPV6_V6ONLY socket? */
3207 if (SCTP_IPV6_V6ONLY(ip_inp)) {
3208 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3209 return (EINVAL);
3210 }
3211 #ifdef HAVE_SA_LEN
3212 if (addr->sa_len != sizeof(*sin)) {
3213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3214 return (EINVAL);
3215 }
3216 #endif
3218 sin = (struct sockaddr_in *)addr;
3219 lport = sin->sin_port;
3220 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
3221 /*
3222 * For LOOPBACK the prison_local_ip4() call will transmute the ip address
3223 * to the proper value.
3224 */
3225 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
3226 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3227 return (error);
3228 }
3229 #endif
3230 if (sin->sin_addr.s_addr != INADDR_ANY) {
3231 bindall = 0;
3232 }
3233 break;
3234 }
3235 #endif
3236 #ifdef INET6
3237 case AF_INET6:
3238 {
3239 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
3240 struct sockaddr_in6 *sin6;
3242 sin6 = (struct sockaddr_in6 *)addr;
3244 #ifdef HAVE_SA_LEN
3245 if (addr->sa_len != sizeof(*sin6)) {
3246 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3247 return (EINVAL);
3248 }
3249 #endif
3250 lport = sin6->sin6_port;
3251 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
3252 /*
3253 * For LOOPBACK the prison_local_ip6() call will transmute the ipv6 address
3254 * to the proper value.
3255 */
3256 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
3257 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
3258 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3259 return (error);
3260 }
3261 #endif
3262 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3263 bindall = 0;
3264 #ifdef SCTP_EMBEDDED_V6_SCOPE
3265 /* KAME hack: embed scopeid */
3266 #if defined(SCTP_KAME)
3267 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
3268 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3269 return (EINVAL);
3270 }
3271 #elif defined(__APPLE__)
3272 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
3273 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL) != 0) {
3274 #else
3275 if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL, NULL) != 0) {
3276 #endif
3277 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3278 return (EINVAL);
3279 }
3280 #elif defined(__FreeBSD__)
3281 error = scope6_check_id(sin6, MODULE_GLOBAL(ip6_use_defzone));
3282 if (error != 0) {
3283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3284 return (error);
3285 }
3286 #else
3287 if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) {
3288 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3289 return (EINVAL);
3290 }
3291 #endif
3292 #endif /* SCTP_EMBEDDED_V6_SCOPE */
3293 }
3294 #ifndef SCOPEDROUTING
3295 /* this must be cleared for ifa_ifwithaddr() */
3296 sin6->sin6_scope_id = 0;
3297 #endif /* SCOPEDROUTING */
3298 break;
3299 }
3300 #endif
3301 #if defined(__Userspace__)
3302 case AF_CONN:
3303 {
3304 struct sockaddr_conn *sconn;
3306 #ifdef HAVE_SA_LEN
3307 if (addr->sa_len != sizeof(struct sockaddr_conn)) {
3308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3309 return (EINVAL);
3310 }
3311 #endif
3312 sconn = (struct sockaddr_conn *)addr;
3313 lport = sconn->sconn_port;
3314 if (sconn->sconn_addr != NULL) {
3315 bindall = 0;
3316 }
3317 break;
3318 }
3319 #endif
3320 default:
3321 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
3322 return (EAFNOSUPPORT);
3323 }
3324 }
3325 SCTP_INP_INFO_WLOCK();
3326 SCTP_INP_WLOCK(inp);
3327 /* Setup a vrf_id to be the default for the non-bind-all case. */
3328 vrf_id = inp->def_vrf_id;
3330 /* increase our count due to the unlock we do */
3331 SCTP_INP_INCR_REF(inp);
3332 if (lport) {
3333 /*
3334 * Did the caller specify a port? if so we must see if an ep
3335 * already has this one bound.
3336 */
3337 /* got to be root to get at low ports */
3338 #if !defined(__Windows__)
3339 if (ntohs(lport) < IPPORT_RESERVED) {
3340 if (p && (error =
3341 #ifdef __FreeBSD__
3342 #if __FreeBSD_version > 602000
3343 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3344 #elif __FreeBSD_version >= 500000
3345 suser_cred(p->td_ucred, 0)
3346 #else
3347 suser(p)
3348 #endif
3349 #elif defined(__APPLE__)
3350 suser(p->p_ucred, &p->p_acflag)
3351 #elif defined(__Userspace__) /* must be true to use raw socket */
3352 1
3353 #else
3354 suser(p, 0)
3355 #endif
3356 )) {
3357 SCTP_INP_DECR_REF(inp);
3358 SCTP_INP_WUNLOCK(inp);
3359 SCTP_INP_INFO_WUNLOCK();
3360 return (error);
3361 }
3362 #if defined(__Panda__)
3363 if (!SCTP_IS_PRIVILEDGED(so)) {
3364 SCTP_INP_DECR_REF(inp);
3365 SCTP_INP_WUNLOCK(inp);
3366 SCTP_INP_INFO_WUNLOCK();
3367 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EACCES);
3368 return (EACCES);
3369 }
3370 #endif
3371 }
3372 #if !defined(__Panda__) && !defined(__Userspace__)
3373 if (p == NULL) {
3374 SCTP_INP_DECR_REF(inp);
3375 SCTP_INP_WUNLOCK(inp);
3376 SCTP_INP_INFO_WUNLOCK();
3377 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3378 return (error);
3379 }
3380 #endif
3381 #endif /* __Windows__ */
3382 SCTP_INP_WUNLOCK(inp);
3383 if (bindall) {
3384 #ifdef SCTP_MVRF
3385 for (i = 0; i < inp->num_vrfs; i++) {
3386 vrf_id = inp->m_vrf_ids[i];
3387 #else
3388 vrf_id = inp->def_vrf_id;
3389 #endif
3390 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3391 if (inp_tmp != NULL) {
3392 /*
3393 * lock guy returned and lower count
3394 * note that we are not bound so
3395 * inp_tmp should NEVER be inp. And
3396 * it is this inp (inp_tmp) that gets
3397 * the reference bump, so we must
3398 * lower it.
3399 */
3400 SCTP_INP_DECR_REF(inp_tmp);
3401 /* unlock info */
3402 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3403 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3404 /* Ok, must be one-2-one and allowing port re-use */
3405 port_reuse_active = 1;
3406 goto continue_anyway;
3407 }
3408 SCTP_INP_DECR_REF(inp);
3409 SCTP_INP_INFO_WUNLOCK();
3410 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3411 return (EADDRINUSE);
3412 }
3413 #ifdef SCTP_MVRF
3414 }
3415 #endif
3416 } else {
3417 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3418 if (inp_tmp != NULL) {
3419 /*
3420 * lock guy returned and lower count note
3421 * that we are not bound so inp_tmp should
3422 * NEVER be inp. And it is this inp (inp_tmp)
3423 * that gets the reference bump, so we must
3424 * lower it.
3425 */
3426 SCTP_INP_DECR_REF(inp_tmp);
3427 /* unlock info */
3428 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3429 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3430 /* Ok, must be one-2-one and allowing port re-use */
3431 port_reuse_active = 1;
3432 goto continue_anyway;
3433 }
3434 SCTP_INP_DECR_REF(inp);
3435 SCTP_INP_INFO_WUNLOCK();
3436 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3437 return (EADDRINUSE);
3438 }
3439 }
3440 continue_anyway:
3441 SCTP_INP_WLOCK(inp);
3442 if (bindall) {
3443 /* verify that no lport is not used by a singleton */
3444 if ((port_reuse_active == 0) &&
3445 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3446 /* Sorry someone already has this one bound */
3447 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3448 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3449 port_reuse_active = 1;
3450 } else {
3451 SCTP_INP_DECR_REF(inp);
3452 SCTP_INP_WUNLOCK(inp);
3453 SCTP_INP_INFO_WUNLOCK();
3454 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3455 return (EADDRINUSE);
3456 }
3457 }
3458 }
3459 } else {
3460 uint16_t first, last, candidate;
3461 uint16_t count;
3462 int done;
3464 #if defined(__Windows__)
3465 first = 1;
3466 last = 0xffff;
3467 #else
3468 #if defined(__Userspace__)
3469 /* TODO ensure uid is 0, etc... */
3470 #elif defined(__FreeBSD__) || defined(__APPLE__)
3471 if (ip_inp->inp_flags & INP_HIGHPORT) {
3472 first = MODULE_GLOBAL(ipport_hifirstauto);
3473 last = MODULE_GLOBAL(ipport_hilastauto);
3474 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3475 if (p && (error =
3476 #ifdef __FreeBSD__
3477 #if __FreeBSD_version > 602000
3478 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3479 #elif __FreeBSD_version >= 500000
3480 suser_cred(p->td_ucred, 0)
3481 #else
3482 suser(p)
3483 #endif
3484 #elif defined(__APPLE__)
3485 suser(p->p_ucred, &p->p_acflag)
3486 #else
3487 suser(p, 0)
3488 #endif
3489 )) {
3490 SCTP_INP_DECR_REF(inp);
3491 SCTP_INP_WUNLOCK(inp);
3492 SCTP_INP_INFO_WUNLOCK();
3493 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3494 return (error);
3495 }
3496 first = MODULE_GLOBAL(ipport_lowfirstauto);
3497 last = MODULE_GLOBAL(ipport_lowlastauto);
3498 } else {
3499 #endif
3500 first = MODULE_GLOBAL(ipport_firstauto);
3501 last = MODULE_GLOBAL(ipport_lastauto);
3502 #if defined(__FreeBSD__) || defined(__APPLE__)
3503 }
3504 #endif
3505 #endif /* __Windows__ */
3506 if (first > last) {
3507 uint16_t temp;
3509 temp = first;
3510 first = last;
3511 last = temp;
3512 }
3513 count = last - first + 1; /* number of candidates */
3514 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3516 done = 0;
3517 while (!done) {
3518 #ifdef SCTP_MVRF
3519 for (i = 0; i < inp->num_vrfs; i++) {
3520 if (sctp_isport_inuse(inp, htons(candidate), inp->m_vrf_ids[i]) != NULL) {
3521 break;
3522 }
3523 }
3524 if (i == inp->num_vrfs) {
3525 done = 1;
3526 }
3527 #else
3528 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3529 done = 1;
3530 }
3531 #endif
3532 if (!done) {
3533 if (--count == 0) {
3534 SCTP_INP_DECR_REF(inp);
3535 SCTP_INP_WUNLOCK(inp);
3536 SCTP_INP_INFO_WUNLOCK();
3537 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3538 return (EADDRINUSE);
3539 }
3540 if (candidate == last)
3541 candidate = first;
3542 else
3543 candidate = candidate + 1;
3544 }
3545 }
3546 lport = htons(candidate);
3547 }
3548 SCTP_INP_DECR_REF(inp);
3549 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3550 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3551 /*
3552 * this really should not happen. The guy did a non-blocking
3553 * bind and then did a close at the same time.
3554 */
3555 SCTP_INP_WUNLOCK(inp);
3556 SCTP_INP_INFO_WUNLOCK();
3557 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3558 return (EINVAL);
3559 }
3560 /* ok we look clear to give out this port, so lets setup the binding */
3561 if (bindall) {
3562 /* binding to all addresses, so just set in the proper flags */
3563 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3564 /* set the automatic addr changes from kernel flag */
3565 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3566 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3567 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3568 } else {
3569 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3570 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3571 }
3572 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3573 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3574 } else {
3575 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3576 }
3577 /* set the automatic mobility_base from kernel
3578 flag (by micchie)
3579 */
3580 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3581 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3582 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3583 } else {
3584 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3585 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3586 }
3587 /* set the automatic mobility_fasthandoff from kernel
3588 flag (by micchie)
3589 */
3590 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3591 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3592 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3593 } else {
3594 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3595 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3596 }
3597 } else {
3598 /*
3599 * bind specific, make sure flags is off and add a new
3600 * address structure to the sctp_addr_list inside the ep
3601 * structure.
3602 *
3603 * We will need to allocate one and insert it at the head. The
3604 * socketopt call can just insert new addresses in there as
3605 * well. It will also have to do the embed scope kame hack
3606 * too (before adding).
3607 */
3608 struct sctp_ifa *ifa;
3609 struct sockaddr_storage store_sa;
3611 memset(&store_sa, 0, sizeof(store_sa));
3612 switch (addr->sa_family) {
3613 #ifdef INET
3614 case AF_INET:
3615 {
3616 struct sockaddr_in *sin;
3618 sin = (struct sockaddr_in *)&store_sa;
3619 memcpy(sin, addr, sizeof(struct sockaddr_in));
3620 sin->sin_port = 0;
3621 break;
3622 }
3623 #endif
3624 #ifdef INET6
3625 case AF_INET6:
3626 {
3627 struct sockaddr_in6 *sin6;
3629 sin6 = (struct sockaddr_in6 *)&store_sa;
3630 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3631 sin6->sin6_port = 0;
3632 break;
3633 }
3634 #endif
3635 #if defined(__Userspace__)
3636 case AF_CONN:
3637 {
3638 struct sockaddr_conn *sconn;
3640 sconn = (struct sockaddr_conn *)&store_sa;
3641 memcpy(sconn, addr, sizeof(struct sockaddr_conn));
3642 sconn->sconn_port = 0;
3643 break;
3644 }
3645 #endif
3646 default:
3647 break;
3648 }
3649 /*
3650 * first find the interface with the bound address need to
3651 * zero out the port to find the address! yuck! can't do
3652 * this earlier since need port for sctp_pcb_findep()
3653 */
3654 if (sctp_ifap != NULL) {
3655 ifa = sctp_ifap;
3656 } else {
3657 /* Note for BSD we hit here always other
3658 * O/S's will pass things in via the
3659 * sctp_ifap argument (Panda).
3660 */
3661 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3662 vrf_id, SCTP_ADDR_NOT_LOCKED);
3663 }
3664 if (ifa == NULL) {
3665 /* Can't find an interface with that address */
3666 SCTP_INP_WUNLOCK(inp);
3667 SCTP_INP_INFO_WUNLOCK();
3668 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3669 return (EADDRNOTAVAIL);
3670 }
3671 #ifdef INET6
3672 if (addr->sa_family == AF_INET6) {
3673 /* GAK, more FIXME IFA lock? */
3674 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3675 /* Can't bind a non-existent addr. */
3676 SCTP_INP_WUNLOCK(inp);
3677 SCTP_INP_INFO_WUNLOCK();
3678 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3679 return (EINVAL);
3680 }
3681 }
3682 #endif
3683 /* we're not bound all */
3684 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3685 /* allow bindx() to send ASCONF's for binding changes */
3686 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3687 /* clear automatic addr changes from kernel flag */
3688 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3690 /* add this address to the endpoint list */
3691 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3692 if (error != 0) {
3693 SCTP_INP_WUNLOCK(inp);
3694 SCTP_INP_INFO_WUNLOCK();
3695 return (error);
3696 }
3697 inp->laddr_count++;
3698 }
3699 /* find the bucket */
3700 if (port_reuse_active) {
3701 /* Put it into tcp 1-2-1 hash */
3702 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3703 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3704 } else {
3705 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3706 }
3707 /* put it in the bucket */
3708 LIST_INSERT_HEAD(head, inp, sctp_hash);
3709 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3710 (void *)head, ntohs(lport), port_reuse_active);
3711 /* set in the port */
3712 inp->sctp_lport = lport;
3714 /* turn off just the unbound flag */
3715 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3716 SCTP_INP_WUNLOCK(inp);
3717 SCTP_INP_INFO_WUNLOCK();
3718 return (0);
3719 }
3722 static void
3723 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3724 {
3725 struct sctp_iterator *it, *nit;
3727 /*
3728 * We enter with the only the ITERATOR_LOCK in place and a write
3729 * lock on the inp_info stuff.
3730 */
3731 it = sctp_it_ctl.cur_it;
3732 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
3733 if (it && (it->vn != curvnet)) {
3734 /* Its not looking at our VNET */
3735 return;
3736 }
3737 #endif
3738 if (it && (it->inp == inp)) {
3739 /*
3740 * This is tricky and we hold the iterator lock,
3741 * but when it returns and gets the lock (when we
3742 * release it) the iterator will try to operate on
3743 * inp. We need to stop that from happening. But
3744 * of course the iterator has a reference on the
3745 * stcb and inp. We can mark it and it will stop.
3746 *
3747 * If its a single iterator situation, we
3748 * set the end iterator flag. Otherwise
3749 * we set the iterator to go to the next inp.
3750 *
3751 */
3752 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3753 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3754 } else {
3755 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3756 }
3757 }
3758 /* Now go through and remove any single reference to
3759 * our inp that may be still pending on the list
3760 */
3761 SCTP_IPI_ITERATOR_WQ_LOCK();
3762 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3763 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
3764 if (it->vn != curvnet) {
3765 continue;
3766 }
3767 #endif
3768 if (it->inp == inp) {
3769 /* This one points to me is it inp specific? */
3770 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3771 /* Remove and free this one */
3772 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3773 it, sctp_nxt_itr);
3774 if (it->function_atend != NULL) {
3775 (*it->function_atend) (it->pointer, it->val);
3776 }
3777 SCTP_FREE(it, SCTP_M_ITER);
3778 } else {
3779 it->inp = LIST_NEXT(it->inp, sctp_list);
3780 if (it->inp) {
3781 SCTP_INP_INCR_REF(it->inp);
3782 }
3783 }
3784 /* When its put in the refcnt is incremented so decr it */
3785 SCTP_INP_DECR_REF(inp);
3786 }
3787 }
3788 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3789 }
3791 /* release sctp_inpcb unbind the port */
3792 void
3793 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3794 {
3795 /*
3796 * Here we free a endpoint. We must find it (if it is in the Hash
3797 * table) and remove it from there. Then we must also find it in the
3798 * overall list and remove it from there. After all removals are
3799 * complete then any timer has to be stopped. Then start the actual
3800 * freeing. a) Any local lists. b) Any associations. c) The hash of
3801 * all associations. d) finally the ep itself.
3802 */
3803 struct sctp_tcb *asoc, *nasoc;
3804 struct sctp_laddr *laddr, *nladdr;
3805 struct inpcb *ip_pcb;
3806 struct socket *so;
3807 int being_refed = 0;
3808 struct sctp_queued_to_read *sq, *nsq;
3809 #if !defined(__Panda__) && !defined(__Userspace__)
3810 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
3811 sctp_rtentry_t *rt;
3812 #endif
3813 #endif
3814 int cnt;
3815 sctp_sharedkey_t *shared_key, *nshared_key;
3818 #if defined(__APPLE__)
3819 sctp_lock_assert(SCTP_INP_SO(inp));
3820 #endif
3821 #ifdef SCTP_LOG_CLOSING
3822 sctp_log_closing(inp, NULL, 0);
3823 #endif
3824 SCTP_ITERATOR_LOCK();
3825 /* mark any iterators on the list or being processed */
3826 sctp_iterator_inp_being_freed(inp);
3827 SCTP_ITERATOR_UNLOCK();
3828 so = inp->sctp_socket;
3829 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3830 /* been here before.. eeks.. get out of here */
3831 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3832 #ifdef SCTP_LOG_CLOSING
3833 sctp_log_closing(inp, NULL, 1);
3834 #endif
3835 return;
3836 }
3837 SCTP_ASOC_CREATE_LOCK(inp);
3838 SCTP_INP_INFO_WLOCK();
3840 SCTP_INP_WLOCK(inp);
3841 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3842 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3843 /* socket is gone, so no more wakeups allowed */
3844 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3845 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3846 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3848 }
3849 /* First time through we have the socket lock, after that no more. */
3850 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3851 SCTP_FROM_SCTP_PCB+SCTP_LOC_1);
3853 if (inp->control) {
3854 sctp_m_freem(inp->control);
3855 inp->control = NULL;
3856 }
3857 if (inp->pkt) {
3858 sctp_m_freem(inp->pkt);
3859 inp->pkt = NULL;
3860 }
3861 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3862 * here but I will be nice :> (i.e.
3863 * ip_pcb = ep;) */
3864 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3865 int cnt_in_sd;
3867 cnt_in_sd = 0;
3868 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3869 SCTP_TCB_LOCK(asoc);
3870 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3871 /* Skip guys being freed */
3872 cnt_in_sd++;
3873 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3874 /*
3875 * Special case - we did not start a kill
3876 * timer on the asoc due to it was not
3877 * closed. So go ahead and start it now.
3878 */
3879 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3880 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3881 }
3882 SCTP_TCB_UNLOCK(asoc);
3883 continue;
3884 }
3885 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3886 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3887 (asoc->asoc.total_output_queue_size == 0)) {
3888 /* If we have data in queue, we don't want to just
3889 * free since the app may have done, send()/close
3890 * or connect/send/close. And it wants the data
3891 * to get across first.
3892 */
3893 /* Just abandon things in the front states */
3894 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3895 SCTP_FROM_SCTP_PCB+SCTP_LOC_2) == 0) {
3896 cnt_in_sd++;
3897 }
3898 continue;
3899 }
3900 /* Disconnect the socket please */
3901 asoc->sctp_socket = NULL;
3902 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3903 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3904 (asoc->asoc.control_pdapi) ||
3905 (asoc->asoc.size_on_all_streams > 0) ||
3906 (so && (so->so_rcv.sb_cc > 0))) {
3907 /* Left with Data unread */
3908 struct mbuf *op_err;
3910 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3911 0, M_NOWAIT, 1, MT_DATA);
3912 if (op_err) {
3913 /* Fill in the user initiated abort */
3914 struct sctp_paramhdr *ph;
3916 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3917 ph = mtod(op_err, struct sctp_paramhdr *);
3918 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3919 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3920 }
3921 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_3;
3922 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3923 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3924 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3925 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3926 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3927 }
3928 if (sctp_free_assoc(inp, asoc,
3929 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB+SCTP_LOC_4) == 0) {
3930 cnt_in_sd++;
3931 }
3932 continue;
3933 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3934 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3935 (asoc->asoc.stream_queue_cnt == 0)) {
3936 if (asoc->asoc.locked_on_sending) {
3937 goto abort_anyway;
3938 }
3939 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3940 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3941 struct sctp_nets *netp;
3943 /*
3944 * there is nothing queued to send,
3945 * so I send shutdown
3946 */
3947 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3948 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3949 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3950 }
3951 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3952 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3953 sctp_stop_timers_for_shutdown(asoc);
3954 if (asoc->asoc.alternate) {
3955 netp = asoc->asoc.alternate;
3956 } else {
3957 netp = asoc->asoc.primary_destination;
3958 }
3959 sctp_send_shutdown(asoc, netp);
3960 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3961 netp);
3962 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3963 asoc->asoc.primary_destination);
3964 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3965 }
3966 } else {
3967 /* mark into shutdown pending */
3968 struct sctp_stream_queue_pending *sp;
3970 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3971 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3972 asoc->asoc.primary_destination);
3973 if (asoc->asoc.locked_on_sending) {
3974 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3975 sctp_streamhead);
3976 if (sp == NULL) {
3977 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3978 (void *)asoc->asoc.locked_on_sending,
3979 asoc->asoc.locked_on_sending->stream_no);
3980 } else {
3981 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3982 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3983 }
3984 }
3985 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3986 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3987 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3988 struct mbuf *op_err;
3989 abort_anyway:
3990 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
3991 0, M_NOWAIT, 1, MT_DATA);
3992 if (op_err) {
3993 /* Fill in the user initiated abort */
3994 struct sctp_paramhdr *ph;
3996 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
3997 ph = mtod(op_err, struct sctp_paramhdr *);
3998 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
3999 ph->param_length = htons(SCTP_BUF_LEN(op_err));
4000 }
4001 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_5;
4002 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4003 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4004 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
4005 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4006 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4007 }
4008 if (sctp_free_assoc(inp, asoc,
4009 SCTP_PCBFREE_NOFORCE,
4010 SCTP_FROM_SCTP_PCB+SCTP_LOC_6) == 0) {
4011 cnt_in_sd++;
4012 }
4013 continue;
4014 } else {
4015 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
4016 }
4017 }
4018 cnt_in_sd++;
4019 SCTP_TCB_UNLOCK(asoc);
4020 }
4021 /* now is there some left in our SHUTDOWN state? */
4022 if (cnt_in_sd) {
4023 #ifdef SCTP_LOG_CLOSING
4024 sctp_log_closing(inp, NULL, 2);
4025 #endif
4026 inp->sctp_socket = NULL;
4027 SCTP_INP_WUNLOCK(inp);
4028 SCTP_ASOC_CREATE_UNLOCK(inp);
4029 SCTP_INP_INFO_WUNLOCK();
4030 return;
4031 }
4032 }
4033 inp->sctp_socket = NULL;
4034 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
4035 SCTP_PCB_FLAGS_UNBOUND) {
4036 /*
4037 * ok, this guy has been bound. It's port is
4038 * somewhere in the SCTP_BASE_INFO(hash table). Remove
4039 * it!
4040 */
4041 LIST_REMOVE(inp, sctp_hash);
4042 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
4043 }
4045 /* If there is a timer running to kill us,
4046 * forget it, since it may have a contest
4047 * on the INP lock.. which would cause us
4048 * to die ...
4049 */
4050 cnt = 0;
4051 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
4052 SCTP_TCB_LOCK(asoc);
4053 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4054 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
4055 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4056 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
4057 }
4058 cnt++;
4059 SCTP_TCB_UNLOCK(asoc);
4060 continue;
4061 }
4062 /* Free associations that are NOT killing us */
4063 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
4064 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
4065 struct mbuf *op_err;
4067 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
4068 0, M_NOWAIT, 1, MT_DATA);
4069 if (op_err) {
4070 /* Fill in the user initiated abort */
4071 struct sctp_paramhdr *ph;
4073 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr);
4074 ph = mtod(op_err, struct sctp_paramhdr *);
4075 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
4076 ph->param_length = htons(SCTP_BUF_LEN(op_err));
4077 }
4078 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB+SCTP_LOC_7;
4079 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
4080 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
4081 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
4082 cnt++;
4083 SCTP_TCB_UNLOCK(asoc);
4084 continue;
4085 }
4086 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
4087 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
4088 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
4089 }
4090 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB+SCTP_LOC_8) == 0) {
4091 cnt++;
4092 }
4093 }
4094 if (cnt) {
4095 /* Ok we have someone out there that will kill us */
4096 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4097 #ifdef SCTP_LOG_CLOSING
4098 sctp_log_closing(inp, NULL, 3);
4099 #endif
4100 SCTP_INP_WUNLOCK(inp);
4101 SCTP_ASOC_CREATE_UNLOCK(inp);
4102 SCTP_INP_INFO_WUNLOCK();
4103 return;
4104 }
4105 if (SCTP_INP_LOCK_CONTENDED(inp))
4106 being_refed++;
4107 if (SCTP_INP_READ_CONTENDED(inp))
4108 being_refed++;
4109 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
4110 being_refed++;
4112 if ((inp->refcount) ||
4113 (being_refed) ||
4114 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
4115 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4116 #ifdef SCTP_LOG_CLOSING
4117 sctp_log_closing(inp, NULL, 4);
4118 #endif
4119 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
4120 SCTP_INP_WUNLOCK(inp);
4121 SCTP_ASOC_CREATE_UNLOCK(inp);
4122 SCTP_INP_INFO_WUNLOCK();
4123 return;
4124 }
4125 inp->sctp_ep.signature_change.type = 0;
4126 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
4127 /* Remove it from the list .. last thing we need a
4128 * lock for.
4129 */
4130 LIST_REMOVE(inp, sctp_list);
4131 SCTP_INP_WUNLOCK(inp);
4132 SCTP_ASOC_CREATE_UNLOCK(inp);
4133 SCTP_INP_INFO_WUNLOCK();
4134 /* Now we release all locks. Since this INP
4135 * cannot be found anymore except possibly by the
4136 * kill timer that might be running. We call
4137 * the drain function here. It should hit the case
4138 * were it sees the ACTIVE flag cleared and exit
4139 * out freeing us to proceed and destroy everything.
4140 */
4141 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
4142 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
4143 } else {
4144 /* Probably un-needed */
4145 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
4146 }
4148 #ifdef SCTP_LOG_CLOSING
4149 sctp_log_closing(inp, NULL, 5);
4150 #endif
4152 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4153 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
4154 rt = ip_pcb->inp_route.ro_rt;
4155 #endif
4156 #endif
4158 #if defined(__Panda__)
4159 if (inp->pak_to_read) {
4160 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.zero_copy_timer.timer);
4161 SCTP_RELEASE_PKT(inp->pak_to_read);
4162 inp->pak_to_read = NULL;
4163 }
4164 if (inp->pak_to_read_sendq) {
4165 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.zero_copy_sendq_timer.timer);
4166 SCTP_RELEASE_PKT(inp->pak_to_read_sendq);
4167 inp->pak_to_read_sendq = NULL;
4168 }
4169 #endif
4170 if ((inp->sctp_asocidhash) != NULL) {
4171 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
4172 inp->sctp_asocidhash = NULL;
4173 }
4174 /*sa_ignore FREED_MEMORY*/
4175 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
4176 /* Its only abandoned if it had data left */
4177 if (sq->length)
4178 SCTP_STAT_INCR(sctps_left_abandon);
4180 TAILQ_REMOVE(&inp->read_queue, sq, next);
4181 sctp_free_remote_addr(sq->whoFrom);
4182 if (so)
4183 so->so_rcv.sb_cc -= sq->length;
4184 if (sq->data) {
4185 sctp_m_freem(sq->data);
4186 sq->data = NULL;
4187 }
4188 /*
4189 * no need to free the net count, since at this point all
4190 * assoc's are gone.
4191 */
4192 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4193 SCTP_DECR_READQ_COUNT();
4194 }
4195 /* Now the sctp_pcb things */
4196 /*
4197 * free each asoc if it is not already closed/free. we can't use the
4198 * macro here since le_next will get freed as part of the
4199 * sctp_free_assoc() call.
4200 */
4201 if (so) {
4202 #ifdef IPSEC
4203 ipsec_delete_pcbpolicy(ip_pcb);
4204 #endif /* IPSEC */
4206 /* Unlocks not needed since the socket is gone now */
4207 }
4208 #ifndef __Panda__
4209 if (ip_pcb->inp_options) {
4210 (void)sctp_m_free(ip_pcb->inp_options);
4211 ip_pcb->inp_options = 0;
4212 }
4213 #endif
4215 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4216 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
4217 if (rt) {
4218 RTFREE(rt);
4219 ip_pcb->inp_route.ro_rt = 0;
4220 }
4221 #endif
4222 #if defined(__FreeBSD__) && __FreeBSD_version < 803000
4223 #ifdef INET
4224 if (ip_pcb->inp_moptions) {
4225 inp_freemoptions(ip_pcb->inp_moptions);
4226 ip_pcb->inp_moptions = 0;
4227 }
4228 #endif
4229 #endif
4230 #endif
4232 #ifdef INET6
4233 #if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
4234 #if defined(__FreeBSD__) || defined(__APPLE__)
4235 if (ip_pcb->inp_vflag & INP_IPV6) {
4236 #else
4237 if (inp->inp_vflag & INP_IPV6) {
4238 #endif
4239 struct in6pcb *in6p;
4241 in6p = (struct in6pcb *)inp;
4242 ip6_freepcbopts(in6p->in6p_outputopts);
4243 }
4244 #endif
4245 #endif /* INET6 */
4246 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
4247 inp->inp_vflag = 0;
4248 #else
4249 ip_pcb->inp_vflag = 0;
4250 #endif
4251 /* free up authentication fields */
4252 if (inp->sctp_ep.local_auth_chunks != NULL)
4253 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
4254 if (inp->sctp_ep.local_hmacs != NULL)
4255 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
4257 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
4258 LIST_REMOVE(shared_key, next);
4259 sctp_free_sharedkey(shared_key);
4260 /*sa_ignore FREED_MEMORY*/
4261 }
4263 #if defined(__APPLE__)
4264 inp->ip_inp.inp.inp_state = INPCB_STATE_DEAD;
4265 if (in_pcb_checkstate(&inp->ip_inp.inp, WNT_STOPUSING, 1) != WNT_STOPUSING) {
4266 #ifdef INVARIANTS
4267 panic("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4268 #else
4269 SCTP_PRINTF("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp);
4270 #endif
4271 }
4272 inp->ip_inp.inp.inp_socket->so_flags |= SOF_PCBCLEARING;
4273 #endif
4274 /*
4275 * if we have an address list the following will free the list of
4276 * ifaddr's that are set into this ep. Again macro limitations here,
4277 * since the LIST_FOREACH could be a bad idea.
4278 */
4279 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
4280 sctp_remove_laddr(laddr);
4281 }
4283 #ifdef SCTP_TRACK_FREED_ASOCS
4284 /* TEMP CODE */
4285 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
4286 LIST_REMOVE(asoc, sctp_tcblist);
4287 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
4288 SCTP_DECR_ASOC_COUNT();
4289 }
4290 /* *** END TEMP CODE ****/
4291 #endif
4292 #ifdef SCTP_MVRF
4293 SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF);
4294 #endif
4295 /* Now lets see about freeing the EP hash table. */
4296 if (inp->sctp_tcbhash != NULL) {
4297 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
4298 inp->sctp_tcbhash = NULL;
4299 }
4300 /* Now we must put the ep memory back into the zone pool */
4301 #if defined(__FreeBSD__)
4302 INP_LOCK_DESTROY(&inp->ip_inp.inp);
4303 #endif
4304 SCTP_INP_LOCK_DESTROY(inp);
4305 SCTP_INP_READ_DESTROY(inp);
4306 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
4307 #if !defined(__APPLE__)
4308 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
4309 SCTP_DECR_EP_COUNT();
4310 #else
4311 /* For Tiger, we will do this later... */
4312 #endif
4313 }
4316 struct sctp_nets *
4317 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
4318 {
4319 struct sctp_nets *net;
4320 /* locate the address */
4321 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4322 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
4323 return (net);
4324 }
4325 return (NULL);
4326 }
4329 int
4330 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
4331 {
4332 #ifdef __Panda__
4333 return (0);
4334 #else
4335 struct sctp_ifa *sctp_ifa;
4336 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
4337 if (sctp_ifa) {
4338 return (1);
4339 } else {
4340 return (0);
4341 }
4342 #endif
4343 }
4345 /*
4346 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
4347 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
4348 * stats of stuff.
4349 */
4350 int
4351 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
4352 struct sctp_nets **netp, int set_scope, int from)
4353 {
4354 /*
4355 * The following is redundant to the same lines in the
4356 * sctp_aloc_assoc() but is needed since others call the add
4357 * address function
4358 */
4359 struct sctp_nets *net, *netfirst;
4360 int addr_inscope;
4362 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
4363 from);
4364 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
4366 netfirst = sctp_findnet(stcb, newaddr);
4367 if (netfirst) {
4368 /*
4369 * Lie and return ok, we don't want to make the association
4370 * go away for this behavior. It will happen in the TCP
4371 * model in a connected socket. It does not reach the hash
4372 * table until after the association is built so it can't be
4373 * found. Mark as reachable, since the initial creation will
4374 * have been cleared and the NOT_IN_ASSOC flag will have
4375 * been added... and we don't want to end up removing it
4376 * back out.
4377 */
4378 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
4379 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
4380 SCTP_ADDR_UNCONFIRMED);
4381 } else {
4382 netfirst->dest_state = SCTP_ADDR_REACHABLE;
4383 }
4385 return (0);
4386 }
4387 addr_inscope = 1;
4388 switch (newaddr->sa_family) {
4389 #ifdef INET
4390 case AF_INET:
4391 {
4392 struct sockaddr_in *sin;
4394 sin = (struct sockaddr_in *)newaddr;
4395 if (sin->sin_addr.s_addr == 0) {
4396 /* Invalid address */
4397 return (-1);
4398 }
4399 /* zero out the bzero area */
4400 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
4402 /* assure len is set */
4403 #ifdef HAVE_SIN_LEN
4404 sin->sin_len = sizeof(struct sockaddr_in);
4405 #endif
4406 if (set_scope) {
4407 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
4408 stcb->asoc.scope.ipv4_local_scope = 1;
4409 #else
4410 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
4411 stcb->asoc.scope.ipv4_local_scope = 1;
4412 }
4413 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
4414 } else {
4415 /* Validate the address is in scope */
4416 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
4417 (stcb->asoc.scope.ipv4_local_scope == 0)) {
4418 addr_inscope = 0;
4419 }
4420 }
4421 break;
4422 }
4423 #endif
4424 #ifdef INET6
4425 case AF_INET6:
4426 {
4427 struct sockaddr_in6 *sin6;
4429 sin6 = (struct sockaddr_in6 *)newaddr;
4430 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
4431 /* Invalid address */
4432 return (-1);
4433 }
4434 /* assure len is set */
4435 #ifdef HAVE_SIN6_LEN
4436 sin6->sin6_len = sizeof(struct sockaddr_in6);
4437 #endif
4438 if (set_scope) {
4439 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
4440 stcb->asoc.scope.loopback_scope = 1;
4441 stcb->asoc.scope.local_scope = 0;
4442 stcb->asoc.scope.ipv4_local_scope = 1;
4443 stcb->asoc.scope.site_scope = 1;
4444 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
4445 /*
4446 * If the new destination is a LINK_LOCAL we
4447 * must have common site scope. Don't set
4448 * the local scope since we may not share
4449 * all links, only loopback can do this.
4450 * Links on the local network would also be
4451 * on our private network for v4 too.
4452 */
4453 stcb->asoc.scope.ipv4_local_scope = 1;
4454 stcb->asoc.scope.site_scope = 1;
4455 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
4456 /*
4457 * If the new destination is SITE_LOCAL then
4458 * we must have site scope in common.
4459 */
4460 stcb->asoc.scope.site_scope = 1;
4461 }
4462 } else {
4463 /* Validate the address is in scope */
4464 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
4465 (stcb->asoc.scope.loopback_scope == 0)) {
4466 addr_inscope = 0;
4467 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
4468 (stcb->asoc.scope.local_scope == 0)) {
4469 addr_inscope = 0;
4470 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
4471 (stcb->asoc.scope.site_scope == 0)) {
4472 addr_inscope = 0;
4473 }
4474 }
4475 break;
4476 }
4477 #endif
4478 #if defined(__Userspace__)
4479 case AF_CONN:
4480 {
4481 struct sockaddr_conn *sconn;
4483 sconn = (struct sockaddr_conn *)newaddr;
4484 if (sconn->sconn_addr == NULL) {
4485 /* Invalid address */
4486 return (-1);
4487 }
4488 #ifdef HAVE_SCONN_LEN
4489 sconn->sconn_len = sizeof(struct sockaddr_conn);
4490 #endif
4491 break;
4492 }
4493 #endif
4494 default:
4495 /* not supported family type */
4496 return (-1);
4497 }
4498 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
4499 if (net == NULL) {
4500 return (-1);
4501 }
4502 SCTP_INCR_RADDR_COUNT();
4503 bzero(net, sizeof(struct sctp_nets));
4504 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
4505 #ifdef HAVE_SA_LEN
4506 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
4507 #endif
4508 switch (newaddr->sa_family) {
4509 #ifdef INET
4510 case AF_INET:
4511 #ifndef HAVE_SA_LEN
4512 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in));
4513 #endif
4514 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
4515 break;
4516 #endif
4517 #ifdef INET6
4518 case AF_INET6:
4519 #ifndef HAVE_SA_LEN
4520 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in6));
4521 #endif
4522 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
4523 break;
4524 #endif
4525 #if defined(__Userspace__)
4526 case AF_CONN:
4527 #ifndef HAVE_SA_LEN
4528 memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_conn));
4529 #endif
4530 ((struct sockaddr_conn *)&net->ro._l_addr)->sconn_port = stcb->rport;
4531 break;
4532 #endif
4533 default:
4534 break;
4535 }
4536 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
4537 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
4538 stcb->asoc.scope.loopback_scope = 1;
4539 stcb->asoc.scope.ipv4_local_scope = 1;
4540 stcb->asoc.scope.local_scope = 0;
4541 stcb->asoc.scope.site_scope = 1;
4542 addr_inscope = 1;
4543 }
4544 net->failure_threshold = stcb->asoc.def_net_failure;
4545 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
4546 if (addr_inscope == 0) {
4547 net->dest_state = (SCTP_ADDR_REACHABLE |
4548 SCTP_ADDR_OUT_OF_SCOPE);
4549 } else {
4550 if (from == SCTP_ADDR_IS_CONFIRMED)
4551 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
4552 net->dest_state = SCTP_ADDR_REACHABLE;
4553 else
4554 net->dest_state = SCTP_ADDR_REACHABLE |
4555 SCTP_ADDR_UNCONFIRMED;
4556 }
4557 /* We set this to 0, the timer code knows that
4558 * this means its an initial value
4559 */
4560 net->rto_needed = 1;
4561 net->RTO = 0;
4562 net->RTO_measured = 0;
4563 stcb->asoc.numnets++;
4564 net->ref_count = 1;
4565 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4566 net->port = stcb->asoc.port;
4567 net->dscp = stcb->asoc.default_dscp;
4568 #ifdef INET6
4569 net->flowlabel = stcb->asoc.default_flowlabel;
4570 #endif
4571 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4572 net->dest_state |= SCTP_ADDR_NOHB;
4573 } else {
4574 net->dest_state &= ~SCTP_ADDR_NOHB;
4575 }
4576 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4577 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4578 } else {
4579 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4580 }
4581 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4582 /* Init the timer structure */
4583 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4584 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4585 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4587 /* Now generate a route for this guy */
4588 #ifdef INET6
4589 #ifdef SCTP_EMBEDDED_V6_SCOPE
4590 /* KAME hack: embed scopeid */
4591 if (newaddr->sa_family == AF_INET6) {
4592 struct sockaddr_in6 *sin6;
4594 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4595 #if defined(__APPLE__)
4596 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
4597 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL);
4598 #else
4599 (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL, NULL);
4600 #endif
4601 #elif defined(SCTP_KAME)
4602 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4603 #else
4604 (void)in6_embedscope(&sin6->sin6_addr, sin6);
4605 #endif
4606 #ifndef SCOPEDROUTING
4607 sin6->sin6_scope_id = 0;
4608 #endif
4609 }
4610 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4611 #endif
4612 SCTP_RTALLOC((sctp_route_t *)&net->ro, stcb->asoc.vrf_id);
4614 #if !defined(__Userspace__)
4615 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4616 /* Get source address */
4617 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4618 stcb,
4619 (sctp_route_t *)&net->ro,
4620 net,
4621 0,
4622 stcb->asoc.vrf_id);
4623 /* Now get the interface MTU */
4624 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4625 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4626 }
4627 if (net->mtu > 0) {
4628 uint32_t rmtu;
4630 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4631 if (rmtu == 0) {
4632 /* Start things off to match mtu of interface please. */
4633 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4634 net->ro.ro_rt, net->mtu);
4635 } else {
4636 /* we take the route mtu over the interface, since
4637 * the route may be leading out the loopback, or
4638 * a different interface.
4639 */
4640 net->mtu = rmtu;
4641 }
4642 }
4643 }
4644 #endif
4645 if (net->mtu == 0) {
4646 switch (newaddr->sa_family) {
4647 #ifdef INET
4648 case AF_INET:
4649 net->mtu = SCTP_DEFAULT_MTU;
4650 break;
4651 #endif
4652 #ifdef INET6
4653 case AF_INET6:
4654 net->mtu = 1280;
4655 break;
4656 #endif
4657 #if defined(__Userspace__)
4658 case AF_CONN:
4659 net->mtu = 1280;
4660 break;
4661 #endif
4662 default:
4663 break;
4664 }
4665 }
4666 if (net->port) {
4667 net->mtu -= (uint32_t)sizeof(struct udphdr);
4668 }
4669 if (from == SCTP_ALLOC_ASOC) {
4670 stcb->asoc.smallest_mtu = net->mtu;
4671 }
4672 if (stcb->asoc.smallest_mtu > net->mtu) {
4673 stcb->asoc.smallest_mtu = net->mtu;
4674 }
4675 #ifdef INET6
4676 #ifdef SCTP_EMBEDDED_V6_SCOPE
4677 if (newaddr->sa_family == AF_INET6) {
4678 struct sockaddr_in6 *sin6;
4680 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4681 #ifdef SCTP_KAME
4682 (void)sa6_recoverscope(sin6);
4683 #else
4684 (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
4685 #endif /* SCTP_KAME */
4686 }
4687 #endif /* SCTP_EMBEDDED_V6_SCOPE */
4688 #endif
4690 /* JRS - Use the congestion control given in the CC module */
4691 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4692 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param)(stcb, net);
4694 /*
4695 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4696 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4697 */
4698 net->find_pseudo_cumack = 1;
4699 net->find_rtx_pseudo_cumack = 1;
4700 net->src_addr_selected = 0;
4701 #if defined(__FreeBSD__)
4702 /* Choose an initial flowid. */
4703 net->flowid = stcb->asoc.my_vtag ^
4704 ntohs(stcb->rport) ^
4705 ntohs(stcb->sctp_ep->sctp_lport);
4706 #ifdef INVARIANTS
4707 net->flowidset = 1;
4708 #endif
4709 #endif
4710 if (netp) {
4711 *netp = net;
4712 }
4713 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4714 if (net->ro.ro_rt == NULL) {
4715 /* Since we have no route put it at the back */
4716 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4717 } else if (netfirst == NULL) {
4718 /* We are the first one in the pool. */
4719 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4720 } else if (netfirst->ro.ro_rt == NULL) {
4721 /*
4722 * First one has NO route. Place this one ahead of the first
4723 * one.
4724 */
4725 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4726 #ifndef __Panda__
4727 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4728 /*
4729 * This one has a different interface than the one at the
4730 * top of the list. Place it ahead.
4731 */
4732 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4733 #endif
4734 } else {
4735 /*
4736 * Ok we have the same interface as the first one. Move
4737 * forward until we find either a) one with a NULL route...
4738 * insert ahead of that b) one with a different ifp.. insert
4739 * after that. c) end of the list.. insert at the tail.
4740 */
4741 struct sctp_nets *netlook;
4743 do {
4744 netlook = TAILQ_NEXT(netfirst, sctp_next);
4745 if (netlook == NULL) {
4746 /* End of the list */
4747 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4748 break;
4749 } else if (netlook->ro.ro_rt == NULL) {
4750 /* next one has NO route */
4751 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4752 break;
4753 }
4754 #ifndef __Panda__
4755 else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp)
4756 #else
4757 else
4758 #endif
4759 {
4760 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4761 net, sctp_next);
4762 break;
4763 }
4764 #ifndef __Panda__
4765 /* Shift forward */
4766 netfirst = netlook;
4767 #endif
4768 } while (netlook != NULL);
4769 }
4771 /* got to have a primary set */
4772 if (stcb->asoc.primary_destination == 0) {
4773 stcb->asoc.primary_destination = net;
4774 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4775 (net->ro.ro_rt) &&
4776 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4777 /* No route to current primary adopt new primary */
4778 stcb->asoc.primary_destination = net;
4779 }
4780 /* Validate primary is first */
4781 net = TAILQ_FIRST(&stcb->asoc.nets);
4782 if ((net != stcb->asoc.primary_destination) &&
4783 (stcb->asoc.primary_destination)) {
4784 /* first one on the list is NOT the primary
4785 * sctp_cmpaddr() is much more efficient if
4786 * the primary is the first on the list, make it
4787 * so.
4788 */
4789 TAILQ_REMOVE(&stcb->asoc.nets,
4790 stcb->asoc.primary_destination, sctp_next);
4791 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4792 stcb->asoc.primary_destination, sctp_next);
4793 }
4794 return (0);
4795 }
4798 static uint32_t
4799 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4800 {
4801 uint32_t id;
4802 struct sctpasochead *head;
4803 struct sctp_tcb *lstcb;
4805 SCTP_INP_WLOCK(inp);
4806 try_again:
4807 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4808 /* TSNH */
4809 SCTP_INP_WUNLOCK(inp);
4810 return (0);
4811 }
4812 /*
4813 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4814 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4815 */
4816 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4817 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4818 }
4819 id = inp->sctp_associd_counter;
4820 inp->sctp_associd_counter++;
4821 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4822 if (lstcb) {
4823 goto try_again;
4824 }
4825 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4826 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4827 stcb->asoc.in_asocid_hash = 1;
4828 SCTP_INP_WUNLOCK(inp);
4829 return id;
4830 }
4832 /*
4833 * allocate an association and add it to the endpoint. The caller must be
4834 * careful to add all additional addresses once they are know right away or
4835 * else the assoc will be may experience a blackout scenario.
4836 */
4837 struct sctp_tcb *
4838 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4839 int *error, uint32_t override_tag, uint32_t vrf_id,
4840 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
4841 struct thread *p
4842 #elif defined(__Windows__)
4843 PKTHREAD p
4844 #else
4845 #if defined(__Userspace__)
4846 /* __Userspace__ NULL proc is going to be passed here. See sctp_lower_sosend */
4847 #endif
4848 struct proc *p
4849 #endif
4850 )
4851 {
4852 /* note the p argument is only valid in unbound sockets */
4854 struct sctp_tcb *stcb;
4855 struct sctp_association *asoc;
4856 struct sctpasochead *head;
4857 uint16_t rport;
4858 int err;
4860 /*
4861 * Assumption made here: Caller has done a
4862 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4863 * address does not exist already.
4864 */
4865 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4866 /* Hit max assoc, sorry no more */
4867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4868 *error = ENOBUFS;
4869 return (NULL);
4870 }
4871 if (firstaddr == NULL) {
4872 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4873 *error = EINVAL;
4874 return (NULL);
4875 }
4876 SCTP_INP_RLOCK(inp);
4877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4878 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4879 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4880 /*
4881 * If its in the TCP pool, its NOT allowed to create an
4882 * association. The parent listener needs to call
4883 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4884 * off, or connected one does this.. its an error.
4885 */
4886 SCTP_INP_RUNLOCK(inp);
4887 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4888 *error = EINVAL;
4889 return (NULL);
4890 }
4891 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4892 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4893 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4894 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4895 SCTP_INP_RUNLOCK(inp);
4896 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4897 *error = EINVAL;
4898 return (NULL);
4899 }
4900 }
4901 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4902 #ifdef SCTP_DEBUG
4903 if (firstaddr) {
4904 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4905 switch (firstaddr->sa_family) {
4906 #ifdef INET
4907 case AF_INET:
4908 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4909 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4910 break;
4911 #endif
4912 #ifdef INET6
4913 case AF_INET6:
4914 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4915 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4916 break;
4917 #endif
4918 #if defined(__Userspace__)
4919 case AF_CONN:
4920 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4921 ntohs(((struct sockaddr_conn *)firstaddr)->sconn_port));
4922 break;
4923 #endif
4924 default:
4925 break;
4926 }
4927 } else {
4928 SCTPDBG(SCTP_DEBUG_PCB3,"None\n");
4929 }
4930 #endif /* SCTP_DEBUG */
4931 switch (firstaddr->sa_family) {
4932 #ifdef INET
4933 case AF_INET:
4934 {
4935 struct sockaddr_in *sin;
4937 sin = (struct sockaddr_in *)firstaddr;
4938 if ((ntohs(sin->sin_port) == 0) ||
4939 (sin->sin_addr.s_addr == INADDR_ANY) ||
4940 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4941 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4942 /* Invalid address */
4943 SCTP_INP_RUNLOCK(inp);
4944 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4945 *error = EINVAL;
4946 return (NULL);
4947 }
4948 rport = sin->sin_port;
4949 break;
4950 }
4951 #endif
4952 #ifdef INET6
4953 case AF_INET6:
4954 {
4955 struct sockaddr_in6 *sin6;
4957 sin6 = (struct sockaddr_in6 *)firstaddr;
4958 if ((ntohs(sin6->sin6_port) == 0) ||
4959 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4960 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4961 /* Invalid address */
4962 SCTP_INP_RUNLOCK(inp);
4963 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4964 *error = EINVAL;
4965 return (NULL);
4966 }
4967 rport = sin6->sin6_port;
4968 break;
4969 }
4970 #endif
4971 #if defined(__Userspace__)
4972 case AF_CONN:
4973 {
4974 struct sockaddr_conn *sconn;
4976 sconn = (struct sockaddr_conn *)firstaddr;
4977 if ((ntohs(sconn->sconn_port) == 0) ||
4978 (sconn->sconn_addr == NULL)) {
4979 /* Invalid address */
4980 SCTP_INP_RUNLOCK(inp);
4981 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4982 *error = EINVAL;
4983 return (NULL);
4984 }
4985 rport = sconn->sconn_port;
4986 break;
4987 }
4988 #endif
4989 default:
4990 /* not supported family type */
4991 SCTP_INP_RUNLOCK(inp);
4992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4993 *error = EINVAL;
4994 return (NULL);
4995 }
4996 SCTP_INP_RUNLOCK(inp);
4997 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4998 /*
4999 * If you have not performed a bind, then we need to do the
5000 * ephemeral bind for you.
5001 */
5002 if ((err = sctp_inpcb_bind(inp->sctp_socket,
5003 (struct sockaddr *)NULL,
5004 (struct sctp_ifa *)NULL,
5005 #ifndef __Panda__
5006 p
5007 #else
5008 (struct proc *)NULL
5009 #endif
5010 ))) {
5011 /* bind error, probably perm */
5012 *error = err;
5013 return (NULL);
5014 }
5015 }
5016 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
5017 if (stcb == NULL) {
5018 /* out of memory? */
5019 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
5020 *error = ENOMEM;
5021 return (NULL);
5022 }
5023 SCTP_INCR_ASOC_COUNT();
5025 bzero(stcb, sizeof(*stcb));
5026 asoc = &stcb->asoc;
5028 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
5029 SCTP_TCB_LOCK_INIT(stcb);
5030 SCTP_TCB_SEND_LOCK_INIT(stcb);
5031 stcb->rport = rport;
5032 /* setup back pointer's */
5033 stcb->sctp_ep = inp;
5034 stcb->sctp_socket = inp->sctp_socket;
5035 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
5036 /* failed */
5037 SCTP_TCB_LOCK_DESTROY(stcb);
5038 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5039 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5040 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5041 SCTP_DECR_ASOC_COUNT();
5042 *error = err;
5043 return (NULL);
5044 }
5045 /* and the port */
5046 SCTP_INP_INFO_WLOCK();
5047 SCTP_INP_WLOCK(inp);
5048 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5049 /* inpcb freed while alloc going on */
5050 SCTP_TCB_LOCK_DESTROY(stcb);
5051 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5052 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5053 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5054 SCTP_INP_WUNLOCK(inp);
5055 SCTP_INP_INFO_WUNLOCK();
5056 SCTP_DECR_ASOC_COUNT();
5057 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5058 *error = EINVAL;
5059 return (NULL);
5060 }
5061 SCTP_TCB_LOCK(stcb);
5063 /* now that my_vtag is set, add it to the hash */
5064 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
5065 /* put it in the bucket in the vtag hash of assoc's for the system */
5066 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
5067 SCTP_INP_INFO_WUNLOCK();
5069 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
5070 /* failure.. memory error? */
5071 if (asoc->strmout) {
5072 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5073 asoc->strmout = NULL;
5074 }
5075 if (asoc->mapping_array) {
5076 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5077 asoc->mapping_array = NULL;
5078 }
5079 if (asoc->nr_mapping_array) {
5080 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5081 asoc->nr_mapping_array = NULL;
5082 }
5083 SCTP_DECR_ASOC_COUNT();
5084 SCTP_TCB_UNLOCK(stcb);
5085 SCTP_TCB_LOCK_DESTROY(stcb);
5086 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5087 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5088 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5089 SCTP_INP_WUNLOCK(inp);
5090 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
5091 *error = ENOBUFS;
5092 return (NULL);
5093 }
5094 /* Init all the timers */
5095 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
5096 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
5097 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
5098 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
5099 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
5100 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
5101 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
5103 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
5104 /* now file the port under the hash as well */
5105 if (inp->sctp_tcbhash != NULL) {
5106 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
5107 inp->sctp_hashmark)];
5108 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
5109 }
5110 SCTP_INP_WUNLOCK(inp);
5111 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
5112 return (stcb);
5113 }
5116 void
5117 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
5118 {
5119 struct sctp_association *asoc;
5121 asoc = &stcb->asoc;
5122 asoc->numnets--;
5123 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5124 if (net == asoc->primary_destination) {
5125 /* Reset primary */
5126 struct sctp_nets *lnet;
5128 lnet = TAILQ_FIRST(&asoc->nets);
5129 /* Mobility adaptation
5130 Ideally, if deleted destination is the primary, it becomes
5131 a fast retransmission trigger by the subsequent SET PRIMARY.
5132 (by micchie)
5133 */
5134 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
5135 SCTP_MOBILITY_BASE) ||
5136 sctp_is_mobility_feature_on(stcb->sctp_ep,
5137 SCTP_MOBILITY_FASTHANDOFF)) {
5138 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
5139 if (asoc->deleted_primary != NULL) {
5140 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
5141 goto out;
5142 }
5143 asoc->deleted_primary = net;
5144 atomic_add_int(&net->ref_count, 1);
5145 memset(&net->lastsa, 0, sizeof(net->lastsa));
5146 memset(&net->lastsv, 0, sizeof(net->lastsv));
5147 sctp_mobility_feature_on(stcb->sctp_ep,
5148 SCTP_MOBILITY_PRIM_DELETED);
5149 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
5150 stcb->sctp_ep, stcb, NULL);
5151 }
5152 out:
5153 /* Try to find a confirmed primary */
5154 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
5155 }
5156 if (net == asoc->last_data_chunk_from) {
5157 /* Reset primary */
5158 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
5159 }
5160 if (net == asoc->last_control_chunk_from) {
5161 /* Clear net */
5162 asoc->last_control_chunk_from = NULL;
5163 }
5164 if (net == stcb->asoc.alternate) {
5165 sctp_free_remote_addr(stcb->asoc.alternate);
5166 stcb->asoc.alternate = NULL;
5167 }
5168 sctp_free_remote_addr(net);
5169 }
5171 /*
5172 * remove a remote endpoint address from an association, it will fail if the
5173 * address does not exist.
5174 */
5175 int
5176 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
5177 {
5178 /*
5179 * Here we need to remove a remote address. This is quite simple, we
5180 * first find it in the list of address for the association
5181 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
5182 * on that item. Note we do not allow it to be removed if there are
5183 * no other addresses.
5184 */
5185 struct sctp_association *asoc;
5186 struct sctp_nets *net, *nnet;
5188 asoc = &stcb->asoc;
5190 /* locate the address */
5191 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5192 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
5193 continue;
5194 }
5195 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
5196 remaddr)) {
5197 /* we found the guy */
5198 if (asoc->numnets < 2) {
5199 /* Must have at LEAST two remote addresses */
5200 return (-1);
5201 } else {
5202 sctp_remove_net(stcb, net);
5203 return (0);
5204 }
5205 }
5206 }
5207 /* not found. */
5208 return (-2);
5209 }
5211 void
5212 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5213 {
5214 struct sctpvtaghead *chain;
5215 struct sctp_tagblock *twait_block;
5216 int found = 0;
5217 int i;
5219 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5220 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5221 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5222 if ((twait_block->vtag_block[i].v_tag == tag) &&
5223 (twait_block->vtag_block[i].lport == lport) &&
5224 (twait_block->vtag_block[i].rport == rport)) {
5225 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5226 twait_block->vtag_block[i].v_tag = 0;
5227 twait_block->vtag_block[i].lport = 0;
5228 twait_block->vtag_block[i].rport = 0;
5229 found = 1;
5230 break;
5231 }
5232 }
5233 if (found)
5234 break;
5235 }
5236 }
5238 int
5239 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
5240 {
5241 struct sctpvtaghead *chain;
5242 struct sctp_tagblock *twait_block;
5243 int found = 0;
5244 int i;
5246 SCTP_INP_INFO_WLOCK();
5247 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5248 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5249 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5250 if ((twait_block->vtag_block[i].v_tag == tag) &&
5251 (twait_block->vtag_block[i].lport == lport) &&
5252 (twait_block->vtag_block[i].rport == rport)) {
5253 found = 1;
5254 break;
5255 }
5256 }
5257 if (found)
5258 break;
5259 }
5260 SCTP_INP_INFO_WUNLOCK();
5261 return (found);
5262 }
5265 void
5266 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
5267 {
5268 struct sctpvtaghead *chain;
5269 struct sctp_tagblock *twait_block;
5270 struct timeval now;
5271 int set, i;
5273 if (time == 0) {
5274 /* Its disabled */
5275 return;
5276 }
5277 (void)SCTP_GETTIME_TIMEVAL(&now);
5278 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5279 set = 0;
5280 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5281 /* Block(s) present, lets find space, and expire on the fly */
5282 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5283 if ((twait_block->vtag_block[i].v_tag == 0) &&
5284 !set) {
5285 twait_block->vtag_block[i].tv_sec_at_expire =
5286 now.tv_sec + time;
5287 twait_block->vtag_block[i].v_tag = tag;
5288 twait_block->vtag_block[i].lport = lport;
5289 twait_block->vtag_block[i].rport = rport;
5290 set = 1;
5291 } else if ((twait_block->vtag_block[i].v_tag) &&
5292 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
5293 /* Audit expires this guy */
5294 twait_block->vtag_block[i].tv_sec_at_expire = 0;
5295 twait_block->vtag_block[i].v_tag = 0;
5296 twait_block->vtag_block[i].lport = 0;
5297 twait_block->vtag_block[i].rport = 0;
5298 if (set == 0) {
5299 /* Reuse it for my new tag */
5300 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
5301 twait_block->vtag_block[i].v_tag = tag;
5302 twait_block->vtag_block[i].lport = lport;
5303 twait_block->vtag_block[i].rport = rport;
5304 set = 1;
5305 }
5306 }
5307 }
5308 if (set) {
5309 /*
5310 * We only do up to the block where we can
5311 * place our tag for audits
5312 */
5313 break;
5314 }
5315 }
5316 /* Need to add a new block to chain */
5317 if (!set) {
5318 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
5319 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
5320 if (twait_block == NULL) {
5321 #ifdef INVARIANTS
5322 panic("Can not alloc tagblock");
5323 #endif
5324 return;
5325 }
5326 memset(twait_block, 0, sizeof(struct sctp_tagblock));
5327 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
5328 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
5329 twait_block->vtag_block[0].v_tag = tag;
5330 twait_block->vtag_block[0].lport = lport;
5331 twait_block->vtag_block[0].rport = rport;
5332 }
5333 }
5336 #ifdef __Panda__
5337 void panda_wakeup_socket(struct socket *so);
5338 #endif
5340 /*-
5341 * Free the association after un-hashing the remote port. This
5342 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
5343 * expect that the input to this function IS a locked TCB.
5344 * It will return 0, if it did NOT destroy the association (instead
5345 * it unlocks it. It will return NON-zero if it either destroyed the
5346 * association OR the association is already destroyed.
5347 */
5348 int
5349 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
5350 {
5351 int i;
5352 struct sctp_association *asoc;
5353 struct sctp_nets *net, *nnet;
5354 struct sctp_laddr *laddr, *naddr;
5355 struct sctp_tmit_chunk *chk, *nchk;
5356 struct sctp_asconf_addr *aparam, *naparam;
5357 struct sctp_asconf_ack *aack, *naack;
5358 struct sctp_stream_reset_list *strrst, *nstrrst;
5359 struct sctp_queued_to_read *sq, *nsq;
5360 struct sctp_stream_queue_pending *sp, *nsp;
5361 sctp_sharedkey_t *shared_key, *nshared_key;
5362 struct socket *so;
5364 /* first, lets purge the entry from the hash table. */
5365 #if defined(__APPLE__)
5366 sctp_lock_assert(SCTP_INP_SO(inp));
5367 #endif
5369 #ifdef SCTP_LOG_CLOSING
5370 sctp_log_closing(inp, stcb, 6);
5371 #endif
5372 if (stcb->asoc.state == 0) {
5373 #ifdef SCTP_LOG_CLOSING
5374 sctp_log_closing(inp, NULL, 7);
5375 #endif
5376 /* there is no asoc, really TSNH :-0 */
5377 return (1);
5378 }
5379 if (stcb->asoc.alternate) {
5380 sctp_free_remote_addr(stcb->asoc.alternate);
5381 stcb->asoc.alternate = NULL;
5382 }
5383 #if !defined(__APPLE__) /* TEMP: moved to below */
5384 /* TEMP CODE */
5385 if (stcb->freed_from_where == 0) {
5386 /* Only record the first place free happened from */
5387 stcb->freed_from_where = from_location;
5388 }
5389 /* TEMP CODE */
5390 #endif
5392 asoc = &stcb->asoc;
5393 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5394 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5395 /* nothing around */
5396 so = NULL;
5397 else
5398 so = inp->sctp_socket;
5400 /*
5401 * We used timer based freeing if a reader or writer is in the way.
5402 * So we first check if we are actually being called from a timer,
5403 * if so we abort early if a reader or writer is still in the way.
5404 */
5405 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
5406 (from_inpcbfree == SCTP_NORMAL_PROC)) {
5407 /*
5408 * is it the timer driving us? if so are the reader/writers
5409 * gone?
5410 */
5411 if (stcb->asoc.refcnt) {
5412 /* nope, reader or writer in the way */
5413 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5414 /* no asoc destroyed */
5415 SCTP_TCB_UNLOCK(stcb);
5416 #ifdef SCTP_LOG_CLOSING
5417 sctp_log_closing(inp, stcb, 8);
5418 #endif
5419 return (0);
5420 }
5421 }
5422 /* now clean up any other timers */
5423 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5424 asoc->dack_timer.self = NULL;
5425 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5426 /*-
5427 * For stream reset we don't blast this unless
5428 * it is a str-reset timer, it might be the
5429 * free-asoc timer which we DON'T want to
5430 * disturb.
5431 */
5432 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
5433 asoc->strreset_timer.self = NULL;
5434 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5435 asoc->asconf_timer.self = NULL;
5436 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5437 asoc->autoclose_timer.self = NULL;
5438 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5439 asoc->shut_guard_timer.self = NULL;
5440 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5441 asoc->delayed_event_timer.self = NULL;
5442 /* Mobility adaptation */
5443 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
5444 asoc->delete_prim_timer.self = NULL;
5445 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5446 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5447 net->rxt_timer.self = NULL;
5448 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5449 net->pmtu_timer.self = NULL;
5450 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5451 net->hb_timer.self = NULL;
5452 }
5453 /* Now the read queue needs to be cleaned up (only once) */
5454 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
5455 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
5456 SCTP_INP_READ_LOCK(inp);
5457 TAILQ_FOREACH(sq, &inp->read_queue, next) {
5458 if (sq->stcb == stcb) {
5459 sq->do_not_ref_stcb = 1;
5460 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
5461 /* If there is no end, there never
5462 * will be now.
5463 */
5464 if (sq->end_added == 0) {
5465 /* Held for PD-API clear that. */
5466 sq->pdapi_aborted = 1;
5467 sq->held_length = 0;
5468 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
5469 /*
5470 * Need to add a PD-API aborted indication.
5471 * Setting the control_pdapi assures that it will
5472 * be added right after this msg.
5473 */
5474 uint32_t strseq;
5475 stcb->asoc.control_pdapi = sq;
5476 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
5477 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
5478 stcb,
5479 SCTP_PARTIAL_DELIVERY_ABORTED,
5480 (void *)&strseq,
5481 SCTP_SO_LOCKED);
5482 stcb->asoc.control_pdapi = NULL;
5483 }
5484 }
5485 /* Add an end to wake them */
5486 sq->end_added = 1;
5487 }
5488 }
5489 SCTP_INP_READ_UNLOCK(inp);
5490 if (stcb->block_entry) {
5491 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
5492 stcb->block_entry->error = ECONNRESET;
5493 stcb->block_entry = NULL;
5494 }
5495 }
5496 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
5497 /* Someone holds a reference OR the socket is unaccepted yet.
5498 */
5499 if ((stcb->asoc.refcnt) ||
5500 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5501 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
5502 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
5503 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5504 }
5505 SCTP_TCB_UNLOCK(stcb);
5506 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5507 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5508 /* nothing around */
5509 so = NULL;
5510 if (so) {
5511 /* Wake any reader/writers */
5512 sctp_sorwakeup(inp, so);
5513 sctp_sowwakeup(inp, so);
5514 }
5516 #ifdef SCTP_LOG_CLOSING
5517 sctp_log_closing(inp, stcb, 9);
5518 #endif
5519 /* no asoc destroyed */
5520 return (0);
5521 }
5522 #ifdef SCTP_LOG_CLOSING
5523 sctp_log_closing(inp, stcb, 10);
5524 #endif
5525 /* When I reach here, no others want
5526 * to kill the assoc yet.. and I own
5527 * the lock. Now its possible an abort
5528 * comes in when I do the lock exchange
5529 * below to grab all the locks to do
5530 * the final take out. to prevent this
5531 * we increment the count, which will
5532 * start a timer and blow out above thus
5533 * assuring us that we hold exclusive
5534 * killing of the asoc. Note that
5535 * after getting back the TCB lock
5536 * we will go ahead and increment the
5537 * counter back up and stop any timer
5538 * a passing stranger may have started :-S
5539 */
5540 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5541 atomic_add_int(&stcb->asoc.refcnt, 1);
5543 SCTP_TCB_UNLOCK(stcb);
5544 SCTP_INP_INFO_WLOCK();
5545 SCTP_INP_WLOCK(inp);
5546 SCTP_TCB_LOCK(stcb);
5547 }
5548 /* Double check the GONE flag */
5549 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
5550 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
5551 /* nothing around */
5552 so = NULL;
5554 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
5555 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
5556 /*
5557 * For TCP type we need special handling when we are
5558 * connected. We also include the peel'ed off ones to.
5559 */
5560 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
5561 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
5562 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
5563 if (so) {
5564 SOCK_LOCK(so);
5565 if (so->so_rcv.sb_cc == 0) {
5566 so->so_state &= ~(SS_ISCONNECTING |
5567 SS_ISDISCONNECTING |
5568 SS_ISCONFIRMING |
5569 SS_ISCONNECTED);
5570 }
5571 #if defined(__APPLE__)
5572 socantrcvmore(so);
5573 #else
5574 socantrcvmore_locked(so);
5575 #endif
5576 sctp_sowwakeup(inp, so);
5577 sctp_sorwakeup(inp, so);
5578 SCTP_SOWAKEUP(so);
5579 }
5580 }
5581 }
5583 /* Make it invalid too, that way if its
5584 * about to run it will abort and return.
5585 */
5586 /* re-increment the lock */
5587 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5588 atomic_add_int(&stcb->asoc.refcnt, -1);
5589 }
5590 if (stcb->asoc.refcnt) {
5591 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
5592 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
5593 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5594 SCTP_INP_INFO_WUNLOCK();
5595 SCTP_INP_WUNLOCK(inp);
5596 }
5597 SCTP_TCB_UNLOCK(stcb);
5598 return (0);
5599 }
5600 asoc->state = 0;
5601 if (inp->sctp_tcbhash) {
5602 LIST_REMOVE(stcb, sctp_tcbhash);
5603 }
5604 if (stcb->asoc.in_asocid_hash) {
5605 LIST_REMOVE(stcb, sctp_tcbasocidhash);
5606 }
5607 /* Now lets remove it from the list of ALL associations in the EP */
5608 LIST_REMOVE(stcb, sctp_tcblist);
5609 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5610 SCTP_INP_INCR_REF(inp);
5611 SCTP_INP_WUNLOCK(inp);
5612 }
5613 /* pull from vtag hash */
5614 LIST_REMOVE(stcb, sctp_asocs);
5615 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
5616 inp->sctp_lport, stcb->rport);
5618 /* Now restop the timers to be sure
5619 * this is paranoia at is finest!
5620 */
5621 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5622 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5623 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5624 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5625 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5626 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5627 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5628 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5629 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5630 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5631 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5632 }
5634 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
5635 /*
5636 * The chunk lists and such SHOULD be empty but we check them just
5637 * in case.
5638 */
5639 /* anything on the wheel needs to be removed */
5640 for (i = 0; i < asoc->streamoutcnt; i++) {
5641 struct sctp_stream_out *outs;
5643 outs = &asoc->strmout[i];
5644 /* now clean up any chunks here */
5645 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5646 TAILQ_REMOVE(&outs->outqueue, sp, next);
5647 sctp_free_spbufspace(stcb, asoc, sp);
5648 if (sp->data) {
5649 if (so) {
5650 /* Still an open socket - report */
5651 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5652 0, (void *)sp, SCTP_SO_LOCKED);
5653 }
5654 if (sp->data) {
5655 sctp_m_freem(sp->data);
5656 sp->data = NULL;
5657 sp->tail_mbuf = NULL;
5658 sp->length = 0;
5659 }
5660 }
5661 if (sp->net) {
5662 sctp_free_remote_addr(sp->net);
5663 sp->net = NULL;
5664 }
5665 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5666 }
5667 }
5668 /*sa_ignore FREED_MEMORY*/
5669 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5670 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5671 SCTP_FREE(strrst, SCTP_M_STRESET);
5672 }
5673 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5674 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5675 if (sq->data) {
5676 sctp_m_freem(sq->data);
5677 sq->data = NULL;
5678 }
5679 sctp_free_remote_addr(sq->whoFrom);
5680 sq->whoFrom = NULL;
5681 sq->stcb = NULL;
5682 /* Free the ctl entry */
5683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5684 SCTP_DECR_READQ_COUNT();
5685 /*sa_ignore FREED_MEMORY*/
5686 }
5687 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5688 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5689 if (chk->data) {
5690 sctp_m_freem(chk->data);
5691 chk->data = NULL;
5692 }
5693 if (chk->holds_key_ref)
5694 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5695 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5696 SCTP_DECR_CHK_COUNT();
5697 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5698 asoc->free_chunk_cnt--;
5699 /*sa_ignore FREED_MEMORY*/
5700 }
5701 /* pending send queue SHOULD be empty */
5702 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5703 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5704 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5705 #ifdef INVARIANTS
5706 } else {
5707 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5708 #endif
5709 }
5710 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5711 if (chk->data) {
5712 if (so) {
5713 /* Still a socket? */
5714 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5715 0, chk, SCTP_SO_LOCKED);
5716 }
5717 if (chk->data) {
5718 sctp_m_freem(chk->data);
5719 chk->data = NULL;
5720 }
5721 }
5722 if (chk->holds_key_ref)
5723 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5724 if (chk->whoTo) {
5725 sctp_free_remote_addr(chk->whoTo);
5726 chk->whoTo = NULL;
5727 }
5728 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5729 SCTP_DECR_CHK_COUNT();
5730 /*sa_ignore FREED_MEMORY*/
5731 }
5732 /* sent queue SHOULD be empty */
5733 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5734 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5735 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5736 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5737 #ifdef INVARIANTS
5738 } else {
5739 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5740 #endif
5741 }
5742 }
5743 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5744 if (chk->data) {
5745 if (so) {
5746 /* Still a socket? */
5747 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5748 0, chk, SCTP_SO_LOCKED);
5749 }
5750 if (chk->data) {
5751 sctp_m_freem(chk->data);
5752 chk->data = NULL;
5753 }
5754 }
5755 if (chk->holds_key_ref)
5756 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5757 sctp_free_remote_addr(chk->whoTo);
5758 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5759 SCTP_DECR_CHK_COUNT();
5760 /*sa_ignore FREED_MEMORY*/
5761 }
5762 #ifdef INVARIANTS
5763 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5764 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5765 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5766 }
5767 }
5768 #endif
5769 /* control queue MAY not be empty */
5770 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5771 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5772 if (chk->data) {
5773 sctp_m_freem(chk->data);
5774 chk->data = NULL;
5775 }
5776 if (chk->holds_key_ref)
5777 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5778 sctp_free_remote_addr(chk->whoTo);
5779 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5780 SCTP_DECR_CHK_COUNT();
5781 /*sa_ignore FREED_MEMORY*/
5782 }
5783 /* ASCONF queue MAY not be empty */
5784 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5785 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5786 if (chk->data) {
5787 sctp_m_freem(chk->data);
5788 chk->data = NULL;
5789 }
5790 if (chk->holds_key_ref)
5791 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5792 sctp_free_remote_addr(chk->whoTo);
5793 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5794 SCTP_DECR_CHK_COUNT();
5795 /*sa_ignore FREED_MEMORY*/
5796 }
5797 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5798 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5799 if (chk->data) {
5800 sctp_m_freem(chk->data);
5801 chk->data = NULL;
5802 }
5803 if (chk->holds_key_ref)
5804 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5805 sctp_free_remote_addr(chk->whoTo);
5806 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5807 SCTP_DECR_CHK_COUNT();
5808 /*sa_ignore FREED_MEMORY*/
5809 }
5811 if (asoc->mapping_array) {
5812 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5813 asoc->mapping_array = NULL;
5814 }
5815 if (asoc->nr_mapping_array) {
5816 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5817 asoc->nr_mapping_array = NULL;
5818 }
5819 /* the stream outs */
5820 if (asoc->strmout) {
5821 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5822 asoc->strmout = NULL;
5823 }
5824 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5825 if (asoc->strmin) {
5826 struct sctp_queued_to_read *ctl, *nctl;
5828 for (i = 0; i < asoc->streamincnt; i++) {
5829 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5830 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5831 sctp_free_remote_addr(ctl->whoFrom);
5832 if (ctl->data) {
5833 sctp_m_freem(ctl->data);
5834 ctl->data = NULL;
5835 }
5836 /*
5837 * We don't free the address here
5838 * since all the net's were freed
5839 * above.
5840 */
5841 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5842 SCTP_DECR_READQ_COUNT();
5843 }
5844 }
5845 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5846 asoc->strmin = NULL;
5847 }
5848 asoc->streamincnt = 0;
5849 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5850 #ifdef INVARIANTS
5851 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5852 panic("no net's left alloc'ed, or list points to itself");
5853 }
5854 #endif
5855 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5856 sctp_free_remote_addr(net);
5857 }
5858 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5859 /*sa_ignore FREED_MEMORY*/
5860 sctp_remove_laddr(laddr);
5861 }
5863 /* pending asconf (address) parameters */
5864 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5865 /*sa_ignore FREED_MEMORY*/
5866 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5867 SCTP_FREE(aparam,SCTP_M_ASC_ADDR);
5868 }
5869 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5870 /*sa_ignore FREED_MEMORY*/
5871 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5872 if (aack->data != NULL) {
5873 sctp_m_freem(aack->data);
5874 }
5875 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5876 }
5877 /* clean up auth stuff */
5878 if (asoc->local_hmacs)
5879 sctp_free_hmaclist(asoc->local_hmacs);
5880 if (asoc->peer_hmacs)
5881 sctp_free_hmaclist(asoc->peer_hmacs);
5883 if (asoc->local_auth_chunks)
5884 sctp_free_chunklist(asoc->local_auth_chunks);
5885 if (asoc->peer_auth_chunks)
5886 sctp_free_chunklist(asoc->peer_auth_chunks);
5888 sctp_free_authinfo(&asoc->authinfo);
5890 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5891 LIST_REMOVE(shared_key, next);
5892 sctp_free_sharedkey(shared_key);
5893 /*sa_ignore FREED_MEMORY*/
5894 }
5896 /* Insert new items here :> */
5898 /* Get rid of LOCK */
5899 SCTP_TCB_UNLOCK(stcb);
5900 SCTP_TCB_LOCK_DESTROY(stcb);
5901 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5902 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5903 SCTP_INP_INFO_WUNLOCK();
5904 SCTP_INP_RLOCK(inp);
5905 }
5906 #if defined(__APPLE__) /* TEMP CODE */
5907 stcb->freed_from_where = from_location;
5908 #endif
5909 #ifdef SCTP_TRACK_FREED_ASOCS
5910 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5911 /* now clean up the tasoc itself */
5912 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5913 SCTP_DECR_ASOC_COUNT();
5914 } else {
5915 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5916 }
5917 #else
5918 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5919 SCTP_DECR_ASOC_COUNT();
5920 #endif
5921 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5922 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5923 /* If its NOT the inp_free calling us AND
5924 * sctp_close as been called, we
5925 * call back...
5926 */
5927 SCTP_INP_RUNLOCK(inp);
5928 /* This will start the kill timer (if we are
5929 * the last one) since we hold an increment yet. But
5930 * this is the only safe way to do this
5931 * since otherwise if the socket closes
5932 * at the same time we are here we might
5933 * collide in the cleanup.
5934 */
5935 sctp_inpcb_free(inp,
5936 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5937 SCTP_CALLED_DIRECTLY_NOCMPSET);
5938 SCTP_INP_DECR_REF(inp);
5939 goto out_of;
5940 } else {
5941 /* The socket is still open. */
5942 SCTP_INP_DECR_REF(inp);
5943 }
5944 }
5945 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5946 SCTP_INP_RUNLOCK(inp);
5947 }
5948 out_of:
5949 /* destroyed the asoc */
5950 #ifdef SCTP_LOG_CLOSING
5951 sctp_log_closing(inp, NULL, 11);
5952 #endif
5953 return (1);
5954 }
5958 /*
5959 * determine if a destination is "reachable" based upon the addresses bound
5960 * to the current endpoint (e.g. only v4 or v6 currently bound)
5961 */
5962 /*
5963 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5964 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5965 * types bound as its endpoint
5966 */
5967 int
5968 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5969 {
5970 struct sctp_inpcb *inp;
5971 int answer;
5973 /*
5974 * No locks here, the TCB, in all cases is already locked and an
5975 * assoc is up. There is either a INP lock by the caller applied (in
5976 * asconf case when deleting an address) or NOT in the HB case,
5977 * however if HB then the INP increment is up and the INP will not
5978 * be removed (on top of the fact that we have a TCB lock). So we
5979 * only want to read the sctp_flags, which is either bound-all or
5980 * not.. no protection needed since once an assoc is up you can't be
5981 * changing your binding.
5982 */
5983 inp = stcb->sctp_ep;
5984 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5985 /* if bound all, destination is not restricted */
5986 /*
5987 * RRS: Question during lock work: Is this correct? If you
5988 * are bound-all you still might need to obey the V4--V6
5989 * flags??? IMO this bound-all stuff needs to be removed!
5990 */
5991 return (1);
5992 }
5993 /* NOTE: all "scope" checks are done when local addresses are added */
5994 switch (destaddr->sa_family) {
5995 #ifdef INET6
5996 case AF_INET6:
5997 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
5998 answer = inp->inp_vflag & INP_IPV6;
5999 #else
6000 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
6001 #endif
6002 break;
6003 #endif
6004 #ifdef INET
6005 case AF_INET:
6006 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6007 answer = inp->inp_vflag & INP_IPV4;
6008 #else
6009 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
6010 #endif
6011 break;
6012 #endif
6013 #if defined(__Userspace__)
6014 case AF_CONN:
6015 answer = inp->ip_inp.inp.inp_vflag & INP_CONN;
6016 break;
6017 #endif
6018 default:
6019 /* invalid family, so it's unreachable */
6020 answer = 0;
6021 break;
6022 }
6023 return (answer);
6024 }
6026 /*
6027 * update the inp_vflags on an endpoint
6028 */
6029 static void
6030 sctp_update_ep_vflag(struct sctp_inpcb *inp)
6031 {
6032 struct sctp_laddr *laddr;
6034 /* first clear the flag */
6035 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6036 inp->inp_vflag = 0;
6037 #else
6038 inp->ip_inp.inp.inp_vflag = 0;
6039 #endif
6040 /* set the flag based on addresses on the ep list */
6041 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6042 if (laddr->ifa == NULL) {
6043 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
6044 __FUNCTION__);
6045 continue;
6046 }
6048 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
6049 continue;
6050 }
6051 switch (laddr->ifa->address.sa.sa_family) {
6052 #ifdef INET6
6053 case AF_INET6:
6054 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6055 inp->inp_vflag |= INP_IPV6;
6056 #else
6057 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6058 #endif
6059 break;
6060 #endif
6061 #ifdef INET
6062 case AF_INET:
6063 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6064 inp->inp_vflag |= INP_IPV4;
6065 #else
6066 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6067 #endif
6068 break;
6069 #endif
6070 #if defined(__Userspace__)
6071 case AF_CONN:
6072 inp->ip_inp.inp.inp_vflag |= INP_CONN;
6073 break;
6074 #endif
6075 default:
6076 break;
6077 }
6078 }
6079 }
6081 /*
6082 * Add the address to the endpoint local address list There is nothing to be
6083 * done if we are bound to all addresses
6084 */
6085 void
6086 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
6087 {
6088 struct sctp_laddr *laddr;
6089 int fnd, error = 0;
6091 fnd = 0;
6093 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6094 /* You are already bound to all. You have it already */
6095 return;
6096 }
6097 #ifdef INET6
6098 if (ifa->address.sa.sa_family == AF_INET6) {
6099 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6100 /* Can't bind a non-useable addr. */
6101 return;
6102 }
6103 }
6104 #endif
6105 /* first, is it already present? */
6106 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6107 if (laddr->ifa == ifa) {
6108 fnd = 1;
6109 break;
6110 }
6111 }
6113 if (fnd == 0) {
6114 /* Not in the ep list */
6115 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
6116 if (error != 0)
6117 return;
6118 inp->laddr_count++;
6119 /* update inp_vflag flags */
6120 switch (ifa->address.sa.sa_family) {
6121 #ifdef INET6
6122 case AF_INET6:
6123 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6124 inp->inp_vflag |= INP_IPV6;
6125 #else
6126 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
6127 #endif
6128 break;
6129 #endif
6130 #ifdef INET
6131 case AF_INET:
6132 #if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__))
6133 inp->inp_vflag |= INP_IPV4;
6134 #else
6135 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
6136 #endif
6137 break;
6138 #endif
6139 #if defined(__Userspace__)
6140 case AF_CONN:
6141 inp->ip_inp.inp.inp_vflag |= INP_CONN;
6142 break;
6143 #endif
6144 default:
6145 break;
6146 }
6147 }
6148 return;
6149 }
6152 /*
6153 * select a new (hopefully reachable) destination net (should only be used
6154 * when we deleted an ep addr that is the only usable source address to reach
6155 * the destination net)
6156 */
6157 static void
6158 sctp_select_primary_destination(struct sctp_tcb *stcb)
6159 {
6160 struct sctp_nets *net;
6162 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6163 /* for now, we'll just pick the first reachable one we find */
6164 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
6165 continue;
6166 if (sctp_destination_is_reachable(stcb,
6167 (struct sockaddr *)&net->ro._l_addr)) {
6168 /* found a reachable destination */
6169 stcb->asoc.primary_destination = net;
6170 }
6171 }
6172 /* I can't there from here! ...we're gonna die shortly... */
6173 }
6176 /*
6177 * Delete the address from the endpoint local address list There is nothing
6178 * to be done if we are bound to all addresses
6179 */
6180 void
6181 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
6182 {
6183 struct sctp_laddr *laddr;
6184 int fnd;
6186 fnd = 0;
6187 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
6188 /* You are already bound to all. You have it already */
6189 return;
6190 }
6191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
6192 if (laddr->ifa == ifa) {
6193 fnd = 1;
6194 break;
6195 }
6196 }
6197 if (fnd && (inp->laddr_count < 2)) {
6198 /* can't delete unless there are at LEAST 2 addresses */
6199 return;
6200 }
6201 if (fnd) {
6202 /*
6203 * clean up any use of this address go through our
6204 * associations and clear any last_used_address that match
6205 * this one for each assoc, see if a new primary_destination
6206 * is needed
6207 */
6208 struct sctp_tcb *stcb;
6210 /* clean up "next_addr_touse" */
6211 if (inp->next_addr_touse == laddr)
6212 /* delete this address */
6213 inp->next_addr_touse = NULL;
6215 /* clean up "last_used_address" */
6216 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6217 struct sctp_nets *net;
6218 SCTP_TCB_LOCK(stcb);
6219 if (stcb->asoc.last_used_address == laddr)
6220 /* delete this address */
6221 stcb->asoc.last_used_address = NULL;
6222 /* Now spin through all the nets and purge any ref to laddr */
6223 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6224 if (net->ro._s_addr &&
6225 (net->ro._s_addr->ifa == laddr->ifa)) {
6226 /* Yep, purge src address selected */
6227 sctp_rtentry_t *rt;
6229 /* delete this address if cached */
6230 rt = net->ro.ro_rt;
6231 if (rt != NULL) {
6232 RTFREE(rt);
6233 net->ro.ro_rt = NULL;
6234 }
6235 sctp_free_ifa(net->ro._s_addr);
6236 net->ro._s_addr = NULL;
6237 net->src_addr_selected = 0;
6238 }
6239 }
6240 SCTP_TCB_UNLOCK(stcb);
6241 } /* for each tcb */
6242 /* remove it from the ep list */
6243 sctp_remove_laddr(laddr);
6244 inp->laddr_count--;
6245 /* update inp_vflag flags */
6246 sctp_update_ep_vflag(inp);
6247 }
6248 return;
6249 }
6251 /*
6252 * Add the address to the TCB local address restricted list.
6253 * This is a "pending" address list (eg. addresses waiting for an
6254 * ASCONF-ACK response) and cannot be used as a valid source address.
6255 */
6256 void
6257 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6258 {
6259 struct sctp_laddr *laddr;
6260 struct sctpladdr *list;
6262 /*
6263 * Assumes TCB is locked.. and possibly the INP. May need to
6264 * confirm/fix that if we need it and is not the case.
6265 */
6266 list = &stcb->asoc.sctp_restricted_addrs;
6268 #ifdef INET6
6269 if (ifa->address.sa.sa_family == AF_INET6) {
6270 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
6271 /* Can't bind a non-existent addr. */
6272 return;
6273 }
6274 }
6275 #endif
6276 /* does the address already exist? */
6277 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
6278 if (laddr->ifa == ifa) {
6279 return;
6280 }
6281 }
6283 /* add to the list */
6284 (void)sctp_insert_laddr(list, ifa, 0);
6285 return;
6286 }
6288 /*
6289 * insert an laddr entry with the given ifa for the desired list
6290 */
6291 int
6292 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
6293 {
6294 struct sctp_laddr *laddr;
6296 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
6297 if (laddr == NULL) {
6298 /* out of memory? */
6299 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
6300 return (EINVAL);
6301 }
6302 SCTP_INCR_LADDR_COUNT();
6303 bzero(laddr, sizeof(*laddr));
6304 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
6305 laddr->ifa = ifa;
6306 laddr->action = act;
6307 atomic_add_int(&ifa->refcount, 1);
6308 /* insert it */
6309 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
6311 return (0);
6312 }
6314 /*
6315 * Remove an laddr entry from the local address list (on an assoc)
6316 */
6317 void
6318 sctp_remove_laddr(struct sctp_laddr *laddr)
6319 {
6321 /* remove from the list */
6322 LIST_REMOVE(laddr, sctp_nxt_addr);
6323 sctp_free_ifa(laddr->ifa);
6324 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
6325 SCTP_DECR_LADDR_COUNT();
6326 }
6328 /*
6329 * Remove a local address from the TCB local address restricted list
6330 */
6331 void
6332 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
6333 {
6334 struct sctp_inpcb *inp;
6335 struct sctp_laddr *laddr;
6337 /*
6338 * This is called by asconf work. It is assumed that a) The TCB is
6339 * locked and b) The INP is locked. This is true in as much as I can
6340 * trace through the entry asconf code where I did these locks.
6341 * Again, the ASCONF code is a bit different in that it does lock
6342 * the INP during its work often times. This must be since we don't
6343 * want other proc's looking up things while what they are looking
6344 * up is changing :-D
6345 */
6347 inp = stcb->sctp_ep;
6348 /* if subset bound and don't allow ASCONF's, can't delete last */
6349 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
6350 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
6351 if (stcb->sctp_ep->laddr_count < 2) {
6352 /* can't delete last address */
6353 return;
6354 }
6355 }
6356 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
6357 /* remove the address if it exists */
6358 if (laddr->ifa == NULL)
6359 continue;
6360 if (laddr->ifa == ifa) {
6361 sctp_remove_laddr(laddr);
6362 return;
6363 }
6364 }
6366 /* address not found! */
6367 return;
6368 }
6370 #if defined(__FreeBSD__)
6371 /*
6372 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
6373 */
6374 /* sysctl */
6375 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
6376 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
6377 #endif /* FreeBSD || APPLE */
6381 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6382 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
6383 int *sctp_cpuarry = NULL;
6384 void
6385 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
6386 {
6387 /* Queue a packet to a processor for the specified core */
6388 struct sctp_mcore_queue *qent;
6389 struct sctp_mcore_ctrl *wkq;
6390 int need_wake = 0;
6391 if (sctp_mcore_workers == NULL) {
6392 /* Something went way bad during setup */
6393 sctp_input_with_port(m, off, 0);
6394 return;
6395 }
6396 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
6397 (sizeof(struct sctp_mcore_queue)),
6398 SCTP_M_MCORE);
6399 if (qent == NULL) {
6400 /* This is trouble */
6401 sctp_input_with_port(m, off, 0);
6402 return;
6403 }
6404 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6405 qent->vn = curvnet;
6406 #endif
6407 qent->m = m;
6408 qent->off = off;
6409 qent->v6 = 0;
6410 wkq = &sctp_mcore_workers[cpu_to_use];
6411 SCTP_MCORE_QLOCK(wkq);
6413 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
6414 if (wkq->running == 0) {
6415 need_wake = 1;
6416 }
6417 SCTP_MCORE_QUNLOCK(wkq);
6418 if (need_wake) {
6419 wakeup(&wkq->running);
6420 }
6421 }
6423 static void
6424 sctp_mcore_thread(void *arg)
6425 {
6427 struct sctp_mcore_ctrl *wkq;
6428 struct sctp_mcore_queue *qent;
6430 wkq = (struct sctp_mcore_ctrl *)arg;
6431 struct mbuf *m;
6432 int off, v6;
6434 /* Wait for first tickle */
6435 SCTP_MCORE_LOCK(wkq);
6436 wkq->running = 0;
6437 msleep(&wkq->running,
6438 &wkq->core_mtx,
6439 0, "wait for pkt", 0);
6440 SCTP_MCORE_UNLOCK(wkq);
6442 /* Bind to our cpu */
6443 thread_lock(curthread);
6444 sched_bind(curthread, wkq->cpuid);
6445 thread_unlock(curthread);
6447 /* Now lets start working */
6448 SCTP_MCORE_LOCK(wkq);
6449 /* Now grab lock and go */
6450 for (;;) {
6451 SCTP_MCORE_QLOCK(wkq);
6452 skip_sleep:
6453 wkq->running = 1;
6454 qent = TAILQ_FIRST(&wkq->que);
6455 if (qent) {
6456 TAILQ_REMOVE(&wkq->que, qent, next);
6457 SCTP_MCORE_QUNLOCK(wkq);
6458 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6459 CURVNET_SET(qent->vn);
6460 #endif
6461 m = qent->m;
6462 off = qent->off;
6463 v6 = qent->v6;
6464 SCTP_FREE(qent, SCTP_M_MCORE);
6465 if (v6 == 0) {
6466 sctp_input_with_port(m, off, 0);
6467 } else {
6468 SCTP_PRINTF("V6 not yet supported\n");
6469 sctp_m_freem(m);
6470 }
6471 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6472 CURVNET_RESTORE();
6473 #endif
6474 SCTP_MCORE_QLOCK(wkq);
6475 }
6476 wkq->running = 0;
6477 if (!TAILQ_EMPTY(&wkq->que)) {
6478 goto skip_sleep;
6479 }
6480 SCTP_MCORE_QUNLOCK(wkq);
6481 msleep(&wkq->running,
6482 &wkq->core_mtx,
6483 0, "wait for pkt", 0);
6484 }
6485 }
6487 static void
6488 sctp_startup_mcore_threads(void)
6489 {
6490 int i, cpu;
6492 if (mp_ncpus == 1)
6493 return;
6495 if (sctp_mcore_workers != NULL) {
6496 /* Already been here in some previous
6497 * vnet?
6498 */
6499 return;
6500 }
6501 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
6502 ((mp_maxid+1) * sizeof(struct sctp_mcore_ctrl)),
6503 SCTP_M_MCORE);
6504 if (sctp_mcore_workers == NULL) {
6505 /* TSNH I hope */
6506 return;
6507 }
6508 memset(sctp_mcore_workers, 0 , ((mp_maxid+1) *
6509 sizeof(struct sctp_mcore_ctrl)));
6510 /* Init the structures */
6511 for (i = 0; i<=mp_maxid; i++) {
6512 TAILQ_INIT(&sctp_mcore_workers[i].que);
6513 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
6514 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
6515 sctp_mcore_workers[i].cpuid = i;
6516 }
6517 if (sctp_cpuarry == NULL) {
6518 SCTP_MALLOC(sctp_cpuarry, int *,
6519 (mp_ncpus * sizeof(int)),
6520 SCTP_M_MCORE);
6521 i = 0;
6522 CPU_FOREACH(cpu) {
6523 sctp_cpuarry[i] = cpu;
6524 i++;
6525 }
6526 }
6528 /* Now start them all */
6529 CPU_FOREACH(cpu) {
6530 #if __FreeBSD_version <= 701000
6531 (void)kthread_create(sctp_mcore_thread,
6532 (void *)&sctp_mcore_workers[cpu],
6533 &sctp_mcore_workers[cpu].thread_proc,
6534 RFPROC,
6535 SCTP_KTHREAD_PAGES,
6536 SCTP_MCORE_NAME);
6538 #else
6539 (void)kproc_create(sctp_mcore_thread,
6540 (void *)&sctp_mcore_workers[cpu],
6541 &sctp_mcore_workers[cpu].thread_proc,
6542 RFPROC,
6543 SCTP_KTHREAD_PAGES,
6544 SCTP_MCORE_NAME);
6545 #endif
6547 }
6548 }
6549 #endif
6550 #if defined(__FreeBSD__) && __FreeBSD_cc_version >= 1100000
6551 static struct mbuf *
6552 sctp_netisr_hdlr(struct mbuf *m, uintptr_t source)
6553 {
6554 struct ip *ip;
6555 struct sctphdr *sh;
6556 int offset;
6557 uint32_t flowid, tag;
6559 /*
6560 * No flow id built by lower layers fix it so we
6561 * create one.
6562 */
6563 ip = mtod(m, struct ip *);
6564 offset = (ip->ip_hl << 2) + sizeof(struct sctphdr);
6565 if (SCTP_BUF_LEN(m) < offset) {
6566 if ((m = m_pullup(m, offset)) == NULL) {
6567 SCTP_STAT_INCR(sctps_hdrops);
6568 return (NULL);
6569 }
6570 ip = mtod(m, struct ip *);
6571 }
6572 sh = (struct sctphdr *)((caddr_t)ip + (ip->ip_hl << 2));
6573 tag = htonl(sh->v_tag);
6574 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6575 m->m_pkthdr.flowid = flowid;
6576 m->m_flags |= M_FLOWID;
6577 return (m);
6578 }
6579 #endif
6581 void
6582 sctp_pcb_init()
6583 {
6584 /*
6585 * SCTP initialization for the PCB structures should be called by
6586 * the sctp_init() funciton.
6587 */
6588 int i;
6589 struct timeval tv;
6591 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
6592 /* error I was called twice */
6593 return;
6594 }
6595 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
6597 #if defined(SCTP_LOCAL_TRACE_BUF)
6598 #if defined(__Windows__)
6599 if (SCTP_BASE_SYSCTL(sctp_log) != NULL) {
6600 bzero(SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
6601 }
6602 #else
6603 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
6604 #endif
6605 #endif
6606 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6607 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
6608 ((mp_maxid+1) * sizeof(struct sctpstat)),
6609 SCTP_M_MCORE);
6610 #endif
6611 (void)SCTP_GETTIME_TIMEVAL(&tv);
6612 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6613 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid+1)));
6614 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
6615 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
6616 #else
6617 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
6618 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
6619 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
6620 #endif
6621 /* init the empty list of (All) Endpoints */
6622 LIST_INIT(&SCTP_BASE_INFO(listhead));
6623 #if defined(__APPLE__)
6624 LIST_INIT(&SCTP_BASE_INFO(inplisthead));
6625 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6626 SCTP_BASE_INFO(sctbinfo).listhead = &SCTP_BASE_INFO(inplisthead);
6627 SCTP_BASE_INFO(sctbinfo).mtx_grp_attr = lck_grp_attr_alloc_init();
6628 lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6629 SCTP_BASE_INFO(sctbinfo).mtx_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6630 SCTP_BASE_INFO(sctbinfo).mtx_attr = lck_attr_alloc_init();
6631 lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6632 #else
6633 SCTP_BASE_INFO(sctbinfo).ipi_listhead = &SCTP_BASE_INFO(inplisthead);
6634 SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr = lck_grp_attr_alloc_init();
6635 lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6636 SCTP_BASE_INFO(sctbinfo).ipi_lock_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6637 SCTP_BASE_INFO(sctbinfo).ipi_lock_attr = lck_attr_alloc_init();
6638 lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6639 #endif
6640 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6641 SCTP_BASE_INFO(sctbinfo).ipi_gc = sctp_gc;
6642 in_pcbinfo_attach(&SCTP_BASE_INFO(sctbinfo));
6643 #endif
6644 #endif
6647 /* init the hash table of endpoints */
6648 #if defined(__FreeBSD__)
6649 #if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 440000
6650 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
6651 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6652 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
6653 #else
6654 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", SCTP_TCBHASHSIZE,
6655 SCTP_BASE_SYSCTL(sctp_hashtblsize));
6656 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", SCTP_PCBHASHSIZE,
6657 SCTP_BASE_SYSCTL(sctp_pcbtblsize));
6658 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", SCTP_CHUNKQUEUE_SCALE,
6659 SCTP_BASE_SYSCTL(sctp_chunkscale));
6660 #endif
6661 #endif
6662 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
6663 &SCTP_BASE_INFO(hashasocmark));
6664 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6665 &SCTP_BASE_INFO(hashmark));
6666 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
6667 &SCTP_BASE_INFO(hashtcpmark));
6668 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
6671 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
6672 &SCTP_BASE_INFO(hashvrfmark));
6674 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
6675 &SCTP_BASE_INFO(vrf_ifn_hashmark));
6676 /* init the zones */
6677 /*
6678 * FIX ME: Should check for NULL returns, but if it does fail we are
6679 * doomed to panic anyways... add later maybe.
6680 */
6681 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
6682 sizeof(struct sctp_inpcb), maxsockets);
6684 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
6685 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
6687 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
6688 sizeof(struct sctp_laddr),
6689 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6691 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
6692 sizeof(struct sctp_nets),
6693 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
6695 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
6696 sizeof(struct sctp_tmit_chunk),
6697 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6699 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
6700 sizeof(struct sctp_queued_to_read),
6701 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6703 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
6704 sizeof(struct sctp_stream_queue_pending),
6705 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6707 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
6708 sizeof(struct sctp_asconf),
6709 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6711 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
6712 sizeof(struct sctp_asconf_ack),
6713 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
6716 /* Master Lock INIT for info structure */
6717 SCTP_INP_INFO_LOCK_INIT();
6718 SCTP_STATLOG_INIT_LOCK();
6720 SCTP_IPI_COUNT_INIT();
6721 SCTP_IPI_ADDR_INIT();
6722 #ifdef SCTP_PACKET_LOGGING
6723 SCTP_IP_PKTLOG_INIT();
6724 #endif
6725 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
6727 SCTP_WQ_ADDR_INIT();
6728 /* not sure if we need all the counts */
6729 SCTP_BASE_INFO(ipi_count_ep) = 0;
6730 /* assoc/tcb zone info */
6731 SCTP_BASE_INFO(ipi_count_asoc) = 0;
6732 /* local addrlist zone info */
6733 SCTP_BASE_INFO(ipi_count_laddr) = 0;
6734 /* remote addrlist zone info */
6735 SCTP_BASE_INFO(ipi_count_raddr) = 0;
6736 /* chunk info */
6737 SCTP_BASE_INFO(ipi_count_chunk) = 0;
6739 /* socket queue zone info */
6740 SCTP_BASE_INFO(ipi_count_readq) = 0;
6742 /* stream out queue cont */
6743 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
6745 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
6746 SCTP_BASE_INFO(ipi_free_chunks) = 0;
6748 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
6750 /* Init the TIMEWAIT list */
6751 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6752 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
6753 }
6754 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6755 #if defined(__Userspace_os_Windows)
6756 InitializeConditionVariable(&sctp_it_ctl.iterator_wakeup);
6757 #else
6758 (void)pthread_cond_init(&sctp_it_ctl.iterator_wakeup, NULL);
6759 #endif
6760 #endif
6761 sctp_startup_iterator();
6763 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6764 sctp_startup_mcore_threads();
6765 #endif
6767 #ifndef __Panda__
6768 /*
6769 * INIT the default VRF which for BSD is the only one, other O/S's
6770 * may have more. But initially they must start with one and then
6771 * add the VRF's as addresses are added.
6772 */
6773 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
6774 #endif
6775 #if defined(__FreeBSD__) && __FreeBSD_cc_version >= 1100000
6776 if (ip_register_flow_handler(sctp_netisr_hdlr, IPPROTO_SCTP)) {
6777 SCTP_PRINTF("***SCTP- Error can't register netisr handler***\n");
6778 }
6779 #endif
6780 #if defined(_SCTP_NEEDS_CALLOUT_) || defined(_USER_SCTP_NEEDS_CALLOUT_)
6781 /* allocate the lock for the callout/timer queue */
6782 SCTP_TIMERQ_LOCK_INIT();
6783 TAILQ_INIT(&SCTP_BASE_INFO(callqueue));
6784 #endif
6785 #if defined(__Userspace__)
6786 mbuf_init(NULL);
6787 atomic_init();
6788 #if defined(INET) || defined(INET6)
6789 recv_thread_init();
6790 #endif
6791 #endif
6792 }
6794 /*
6795 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
6796 */
6797 void
6798 sctp_pcb_finish(void)
6799 {
6800 struct sctp_vrflist *vrf_bucket;
6801 struct sctp_vrf *vrf, *nvrf;
6802 struct sctp_ifn *ifn, *nifn;
6803 struct sctp_ifa *ifa, *nifa;
6804 struct sctpvtaghead *chain;
6805 struct sctp_tagblock *twait_block, *prev_twait_block;
6806 struct sctp_laddr *wi, *nwi;
6807 int i;
6808 struct sctp_iterator *it, *nit;
6810 #if !defined(__FreeBSD__)
6811 /* Notify the iterator to exit. */
6812 SCTP_IPI_ITERATOR_WQ_LOCK();
6813 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_MUST_EXIT;
6814 sctp_wakeup_iterator();
6815 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6816 #endif
6817 #if defined(__APPLE__)
6818 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
6819 in_pcbinfo_detach(&SCTP_BASE_INFO(sctbinfo));
6820 #endif
6821 SCTP_IPI_ITERATOR_WQ_LOCK();
6822 do {
6823 msleep(&sctp_it_ctl.iterator_flags,
6824 sctp_it_ctl.ipi_iterator_wq_mtx,
6825 0, "waiting_for_work", 0);
6826 } while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_EXITED) == 0);
6827 thread_deallocate(sctp_it_ctl.thread_proc);
6828 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6829 #endif
6830 #if defined(__Windows__)
6831 if (sctp_it_ctl.iterator_thread_obj != NULL) {
6832 NTSTATUS status = STATUS_SUCCESS;
6834 KeSetEvent(&sctp_it_ctl.iterator_wakeup[1], IO_NO_INCREMENT, FALSE);
6835 status = KeWaitForSingleObject(sctp_it_ctl.iterator_thread_obj,
6836 Executive,
6837 KernelMode,
6838 FALSE,
6839 NULL);
6840 ObDereferenceObject(sctp_it_ctl.iterator_thread_obj);
6841 }
6842 #endif
6843 #if defined(__Userspace__)
6844 if (sctp_it_ctl.thread_proc) {
6845 #if defined(__Userspace_os_Windows)
6846 WaitForSingleObject(sctp_it_ctl.thread_proc, INFINITE);
6847 CloseHandle(sctp_it_ctl.thread_proc);
6848 sctp_it_ctl.thread_proc = NULL;
6849 #else
6850 pthread_join(sctp_it_ctl.thread_proc, NULL);
6851 sctp_it_ctl.thread_proc = 0;
6852 #endif
6853 }
6854 #endif
6855 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
6856 #if defined(__Userspace_os_Windows)
6857 DeleteConditionVariable(&sctp_it_ctl.iterator_wakeup);
6858 #else
6859 pthread_cond_destroy(&sctp_it_ctl.iterator_wakeup);
6860 #endif
6861 #endif
6862 /* In FreeBSD the iterator thread never exits
6863 * but we do clean up.
6864 * The only way FreeBSD reaches here is if we have VRF's
6865 * but we still add the ifdef to make it compile on old versions.
6866 */
6867 SCTP_IPI_ITERATOR_WQ_LOCK();
6868 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6869 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6870 if (it->vn != curvnet) {
6871 continue;
6872 }
6873 #endif
6874 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6875 if (it->function_atend != NULL) {
6876 (*it->function_atend) (it->pointer, it->val);
6877 }
6878 SCTP_FREE(it,SCTP_M_ITER);
6879 }
6880 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6881 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
6882 SCTP_ITERATOR_LOCK();
6883 if ((sctp_it_ctl.cur_it) &&
6884 (sctp_it_ctl.cur_it->vn == curvnet)) {
6885 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6886 }
6887 SCTP_ITERATOR_UNLOCK();
6888 #endif
6889 #if !defined(__FreeBSD__)
6890 SCTP_IPI_ITERATOR_WQ_DESTROY();
6891 SCTP_ITERATOR_LOCK_DESTROY();
6892 #endif
6893 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6894 SCTP_WQ_ADDR_LOCK();
6895 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6896 LIST_REMOVE(wi, sctp_nxt_addr);
6897 SCTP_DECR_LADDR_COUNT();
6898 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6899 }
6900 SCTP_WQ_ADDR_UNLOCK();
6902 /*
6903 * free the vrf/ifn/ifa lists and hashes (be sure address monitor
6904 * is destroyed first).
6905 */
6906 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6907 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6908 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6909 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6910 /* free the ifa */
6911 LIST_REMOVE(ifa, next_bucket);
6912 LIST_REMOVE(ifa, next_ifa);
6913 SCTP_FREE(ifa, SCTP_M_IFA);
6914 }
6915 /* free the ifn */
6916 LIST_REMOVE(ifn, next_bucket);
6917 LIST_REMOVE(ifn, next_ifn);
6918 SCTP_FREE(ifn, SCTP_M_IFN);
6919 }
6920 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6921 /* free the vrf */
6922 LIST_REMOVE(vrf, next_vrf);
6923 SCTP_FREE(vrf, SCTP_M_VRF);
6924 }
6925 /* free the vrf hashes */
6926 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6927 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6928 #if defined(__Userspace__) && !defined(__Userspace_os_Windows)
6929 /* free memory allocated by getifaddrs call */
6930 #if defined(INET) || defined(INET6)
6931 freeifaddrs(g_interfaces);
6932 #endif
6933 #endif
6935 /* free the TIMEWAIT list elements malloc'd in the function
6936 * sctp_add_vtag_to_timewait()...
6937 */
6938 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6939 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6940 if (!LIST_EMPTY(chain)) {
6941 prev_twait_block = NULL;
6942 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6943 if (prev_twait_block) {
6944 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6945 }
6946 prev_twait_block = twait_block;
6947 }
6948 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6949 }
6950 }
6952 /* free the locks and mutexes */
6953 #if defined(__APPLE__)
6954 SCTP_TIMERQ_LOCK_DESTROY();
6955 #endif
6956 #ifdef SCTP_PACKET_LOGGING
6957 SCTP_IP_PKTLOG_DESTROY();
6958 #endif
6959 SCTP_IPI_ADDR_DESTROY();
6960 #if defined(__APPLE__)
6961 SCTP_IPI_COUNT_DESTROY();
6962 #endif
6963 SCTP_STATLOG_DESTROY();
6964 SCTP_INP_INFO_LOCK_DESTROY();
6966 SCTP_WQ_ADDR_DESTROY();
6968 #if defined(__APPLE__)
6969 #if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION)
6970 lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr);
6971 lck_grp_free(SCTP_BASE_INFO(sctbinfo).mtx_grp);
6972 lck_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_attr);
6973 #else
6974 lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr);
6975 lck_grp_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp);
6976 lck_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr);
6977 #endif
6978 #endif
6979 #if defined(__Userspace__)
6980 SCTP_TIMERQ_LOCK_DESTROY();
6981 SCTP_ZONE_DESTROY(zone_mbuf);
6982 SCTP_ZONE_DESTROY(zone_clust);
6983 SCTP_ZONE_DESTROY(zone_ext_refcnt);
6984 #endif
6985 #if defined(__Windows__) || defined(__FreeBSD__) || defined(__Userspace__)
6986 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6987 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6988 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6989 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6990 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6991 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6992 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6993 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6994 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6995 #endif
6996 /* Get rid of other stuff to */
6997 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6998 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6999 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
7000 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
7001 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
7002 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
7003 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
7004 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
7005 #endif
7006 }
7009 int
7010 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
7011 int offset, int limit,
7012 struct sockaddr *src, struct sockaddr *dst,
7013 struct sockaddr *altsa)
7014 {
7015 /*
7016 * grub through the INIT pulling addresses and loading them to the
7017 * nets structure in the asoc. The from address in the mbuf should
7018 * also be loaded (if it is not already). This routine can be called
7019 * with either INIT or INIT-ACK's as long as the m points to the IP
7020 * packet and the offset points to the beginning of the parameters.
7021 */
7022 struct sctp_inpcb *inp;
7023 struct sctp_nets *net, *nnet, *net_tmp;
7024 struct sctp_paramhdr *phdr, parm_buf;
7025 struct sctp_tcb *stcb_tmp;
7026 uint16_t ptype, plen;
7027 struct sockaddr *sa;
7028 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
7029 struct sctp_auth_random *p_random = NULL;
7030 uint16_t random_len = 0;
7031 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
7032 struct sctp_auth_hmac_algo *hmacs = NULL;
7033 uint16_t hmacs_len = 0;
7034 uint8_t saw_asconf = 0;
7035 uint8_t saw_asconf_ack = 0;
7036 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
7037 struct sctp_auth_chunk_list *chunks = NULL;
7038 uint16_t num_chunks = 0;
7039 sctp_key_t *new_key;
7040 uint32_t keylen;
7041 int got_random = 0, got_hmacs = 0, got_chklist = 0;
7042 uint8_t ecn_allowed;
7043 #ifdef INET
7044 struct sockaddr_in sin;
7045 #endif
7046 #ifdef INET6
7047 struct sockaddr_in6 sin6;
7048 #endif
7050 /* First get the destination address setup too. */
7051 #ifdef INET
7052 memset(&sin, 0, sizeof(sin));
7053 sin.sin_family = AF_INET;
7054 #ifdef HAVE_SIN_LEN
7055 sin.sin_len = sizeof(sin);
7056 #endif
7057 sin.sin_port = stcb->rport;
7058 #endif
7059 #ifdef INET6
7060 memset(&sin6, 0, sizeof(sin6));
7061 sin6.sin6_family = AF_INET6;
7062 #ifdef HAVE_SIN6_LEN
7063 sin6.sin6_len = sizeof(struct sockaddr_in6);
7064 #endif
7065 sin6.sin6_port = stcb->rport;
7066 #endif
7067 if (altsa) {
7068 sa = altsa;
7069 } else {
7070 sa = src;
7071 }
7072 /* Turn off ECN until we get through all params */
7073 ecn_allowed = 0;
7074 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
7075 /* mark all addresses that we have currently on the list */
7076 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
7077 }
7078 /* does the source address already exist? if so skip it */
7079 inp = stcb->sctp_ep;
7080 atomic_add_int(&stcb->asoc.refcnt, 1);
7081 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
7082 atomic_add_int(&stcb->asoc.refcnt, -1);
7084 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
7085 /* we must add the source address */
7086 /* no scope set here since we have a tcb already. */
7087 switch (sa->sa_family) {
7088 #ifdef INET
7089 case AF_INET:
7090 if (stcb->asoc.scope.ipv4_addr_legal) {
7091 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
7092 return (-1);
7093 }
7094 }
7095 break;
7096 #endif
7097 #ifdef INET6
7098 case AF_INET6:
7099 if (stcb->asoc.scope.ipv6_addr_legal) {
7100 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7101 return (-2);
7102 }
7103 }
7104 break;
7105 #endif
7106 #if defined(__Userspace__)
7107 case AF_CONN:
7108 if (stcb->asoc.scope.conn_addr_legal) {
7109 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
7110 return (-2);
7111 }
7112 }
7113 break;
7114 #endif
7115 default:
7116 break;
7117 }
7118 } else {
7119 if (net_tmp != NULL && stcb_tmp == stcb) {
7120 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
7121 } else if (stcb_tmp != stcb) {
7122 /* It belongs to another association? */
7123 if (stcb_tmp)
7124 SCTP_TCB_UNLOCK(stcb_tmp);
7125 return (-3);
7126 }
7127 }
7128 if (stcb->asoc.state == 0) {
7129 /* the assoc was freed? */
7130 return (-4);
7131 }
7132 /*
7133 * peer must explicitly turn this on. This may have been initialized
7134 * to be "on" in order to allow local addr changes while INIT's are
7135 * in flight.
7136 */
7137 stcb->asoc.peer_supports_asconf = 0;
7138 /* now we must go through each of the params. */
7139 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
7140 while (phdr) {
7141 ptype = ntohs(phdr->param_type);
7142 plen = ntohs(phdr->param_length);
7143 /*
7144 * SCTP_PRINTF("ptype => %0x, plen => %d\n", (uint32_t)ptype,
7145 * (int)plen);
7146 */
7147 if (offset + plen > limit) {
7148 break;
7149 }
7150 if (plen == 0) {
7151 break;
7152 }
7153 #ifdef INET
7154 if (ptype == SCTP_IPV4_ADDRESS) {
7155 if (stcb->asoc.scope.ipv4_addr_legal) {
7156 struct sctp_ipv4addr_param *p4, p4_buf;
7158 /* ok get the v4 address and check/add */
7159 phdr = sctp_get_next_param(m, offset,
7160 (struct sctp_paramhdr *)&p4_buf,
7161 sizeof(p4_buf));
7162 if (plen != sizeof(struct sctp_ipv4addr_param) ||
7163 phdr == NULL) {
7164 return (-5);
7165 }
7166 p4 = (struct sctp_ipv4addr_param *)phdr;
7167 sin.sin_addr.s_addr = p4->addr;
7168 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
7169 /* Skip multi-cast addresses */
7170 goto next_param;
7171 }
7172 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
7173 (sin.sin_addr.s_addr == INADDR_ANY)) {
7174 goto next_param;
7175 }
7176 sa = (struct sockaddr *)&sin;
7177 inp = stcb->sctp_ep;
7178 atomic_add_int(&stcb->asoc.refcnt, 1);
7179 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7180 dst, stcb);
7181 atomic_add_int(&stcb->asoc.refcnt, -1);
7183 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
7184 inp == NULL) {
7185 /* we must add the source address */
7186 /*
7187 * no scope set since we have a tcb
7188 * already
7189 */
7191 /*
7192 * we must validate the state again
7193 * here
7194 */
7195 add_it_now:
7196 if (stcb->asoc.state == 0) {
7197 /* the assoc was freed? */
7198 return (-7);
7199 }
7200 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
7201 return (-8);
7202 }
7203 } else if (stcb_tmp == stcb) {
7204 if (stcb->asoc.state == 0) {
7205 /* the assoc was freed? */
7206 return (-10);
7207 }
7208 if (net != NULL) {
7209 /* clear flag */
7210 net->dest_state &=
7211 ~SCTP_ADDR_NOT_IN_ASSOC;
7212 }
7213 } else {
7214 /*
7215 * strange, address is in another
7216 * assoc? straighten out locks.
7217 */
7218 if (stcb_tmp) {
7219 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
7220 /* in setup state we abort this guy */
7221 sctp_abort_an_association(stcb_tmp->sctp_ep,
7222 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
7223 goto add_it_now;
7224 }
7225 SCTP_TCB_UNLOCK(stcb_tmp);
7226 }
7228 if (stcb->asoc.state == 0) {
7229 /* the assoc was freed? */
7230 return (-12);
7231 }
7232 return (-13);
7233 }
7234 }
7235 } else
7236 #endif
7237 #ifdef INET6
7238 if (ptype == SCTP_IPV6_ADDRESS) {
7239 if (stcb->asoc.scope.ipv6_addr_legal) {
7240 /* ok get the v6 address and check/add */
7241 struct sctp_ipv6addr_param *p6, p6_buf;
7243 phdr = sctp_get_next_param(m, offset,
7244 (struct sctp_paramhdr *)&p6_buf,
7245 sizeof(p6_buf));
7246 if (plen != sizeof(struct sctp_ipv6addr_param) ||
7247 phdr == NULL) {
7248 return (-14);
7249 }
7250 p6 = (struct sctp_ipv6addr_param *)phdr;
7251 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
7252 sizeof(p6->addr));
7253 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
7254 /* Skip multi-cast addresses */
7255 goto next_param;
7256 }
7257 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
7258 /* Link local make no sense without scope */
7259 goto next_param;
7260 }
7261 sa = (struct sockaddr *)&sin6;
7262 inp = stcb->sctp_ep;
7263 atomic_add_int(&stcb->asoc.refcnt, 1);
7264 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
7265 dst, stcb);
7266 atomic_add_int(&stcb->asoc.refcnt, -1);
7267 if (stcb_tmp == NULL &&
7268 (inp == stcb->sctp_ep || inp == NULL)) {
7269 /*
7270 * we must validate the state again
7271 * here
7272 */
7273 add_it_now6:
7274 if (stcb->asoc.state == 0) {
7275 /* the assoc was freed? */
7276 return (-16);
7277 }
7278 /*
7279 * we must add the address, no scope
7280 * set
7281 */
7282 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
7283 return (-17);
7284 }
7285 } else if (stcb_tmp == stcb) {
7286 /*
7287 * we must validate the state again
7288 * here
7289 */
7290 if (stcb->asoc.state == 0) {
7291 /* the assoc was freed? */
7292 return (-19);
7293 }
7294 if (net != NULL) {
7295 /* clear flag */
7296 net->dest_state &=
7297 ~SCTP_ADDR_NOT_IN_ASSOC;
7298 }
7299 } else {
7300 /*
7301 * strange, address is in another
7302 * assoc? straighten out locks.
7303 */
7304 if (stcb_tmp)
7305 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
7306 /* in setup state we abort this guy */
7307 sctp_abort_an_association(stcb_tmp->sctp_ep,
7308 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
7309 goto add_it_now6;
7310 }
7311 SCTP_TCB_UNLOCK(stcb_tmp);
7313 if (stcb->asoc.state == 0) {
7314 /* the assoc was freed? */
7315 return (-21);
7316 }
7317 return (-22);
7318 }
7319 }
7320 } else
7321 #endif
7322 if (ptype == SCTP_ECN_CAPABLE) {
7323 ecn_allowed = 1;
7324 } else if (ptype == SCTP_ULP_ADAPTATION) {
7325 if (stcb->asoc.state != SCTP_STATE_OPEN) {
7326 struct sctp_adaptation_layer_indication ai, *aip;
7328 phdr = sctp_get_next_param(m, offset,
7329 (struct sctp_paramhdr *)&ai, sizeof(ai));
7330 aip = (struct sctp_adaptation_layer_indication *)phdr;
7331 if (aip) {
7332 stcb->asoc.peers_adaptation = ntohl(aip->indication);
7333 stcb->asoc.adaptation_needed = 1;
7334 }
7335 }
7336 } else if (ptype == SCTP_SET_PRIM_ADDR) {
7337 struct sctp_asconf_addr_param lstore, *fee;
7338 int lptype;
7339 struct sockaddr *lsa = NULL;
7340 #ifdef INET
7341 struct sctp_asconf_addrv4_param *fii;
7342 #endif
7344 stcb->asoc.peer_supports_asconf = 1;
7345 if (plen > sizeof(lstore)) {
7346 return (-23);
7347 }
7348 phdr = sctp_get_next_param(m, offset,
7349 (struct sctp_paramhdr *)&lstore,
7350 min(plen,sizeof(lstore)));
7351 if (phdr == NULL) {
7352 return (-24);
7353 }
7354 fee = (struct sctp_asconf_addr_param *)phdr;
7355 lptype = ntohs(fee->addrp.ph.param_type);
7356 switch (lptype) {
7357 #ifdef INET
7358 case SCTP_IPV4_ADDRESS:
7359 if (plen !=
7360 sizeof(struct sctp_asconf_addrv4_param)) {
7361 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
7362 (int)sizeof(struct sctp_asconf_addrv4_param),
7363 plen);
7364 } else {
7365 fii = (struct sctp_asconf_addrv4_param *)fee;
7366 sin.sin_addr.s_addr = fii->addrp.addr;
7367 lsa = (struct sockaddr *)&sin;
7368 }
7369 break;
7370 #endif
7371 #ifdef INET6
7372 case SCTP_IPV6_ADDRESS:
7373 if (plen !=
7374 sizeof(struct sctp_asconf_addr_param)) {
7375 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
7376 (int)sizeof(struct sctp_asconf_addr_param),
7377 plen);
7378 } else {
7379 memcpy(sin6.sin6_addr.s6_addr,
7380 fee->addrp.addr,
7381 sizeof(fee->addrp.addr));
7382 lsa = (struct sockaddr *)&sin6;
7383 }
7384 break;
7385 #endif
7386 default:
7387 break;
7388 }
7389 if (lsa) {
7390 (void)sctp_set_primary_addr(stcb, sa, NULL);
7391 }
7392 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
7393 stcb->asoc.peer_supports_nat = 1;
7394 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
7395 /* Peer supports pr-sctp */
7396 stcb->asoc.peer_supports_prsctp = 1;
7397 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
7398 /* A supported extension chunk */
7399 struct sctp_supported_chunk_types_param *pr_supported;
7400 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
7401 int num_ent, i;
7403 phdr = sctp_get_next_param(m, offset,
7404 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store),plen));
7405 if (phdr == NULL) {
7406 return (-25);
7407 }
7408 stcb->asoc.peer_supports_asconf = 0;
7409 stcb->asoc.peer_supports_prsctp = 0;
7410 stcb->asoc.peer_supports_pktdrop = 0;
7411 stcb->asoc.peer_supports_strreset = 0;
7412 stcb->asoc.peer_supports_nr_sack = 0;
7413 stcb->asoc.peer_supports_auth = 0;
7414 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
7415 num_ent = plen - sizeof(struct sctp_paramhdr);
7416 for (i = 0; i < num_ent; i++) {
7417 switch (pr_supported->chunk_types[i]) {
7418 case SCTP_ASCONF:
7419 case SCTP_ASCONF_ACK:
7420 stcb->asoc.peer_supports_asconf = 1;
7421 break;
7422 case SCTP_FORWARD_CUM_TSN:
7423 stcb->asoc.peer_supports_prsctp = 1;
7424 break;
7425 case SCTP_PACKET_DROPPED:
7426 stcb->asoc.peer_supports_pktdrop = 1;
7427 break;
7428 case SCTP_NR_SELECTIVE_ACK:
7429 stcb->asoc.peer_supports_nr_sack = 1;
7430 break;
7431 case SCTP_STREAM_RESET:
7432 stcb->asoc.peer_supports_strreset = 1;
7433 break;
7434 case SCTP_AUTHENTICATION:
7435 stcb->asoc.peer_supports_auth = 1;
7436 break;
7437 default:
7438 /* one I have not learned yet */
7439 break;
7441 }
7442 }
7443 } else if (ptype == SCTP_RANDOM) {
7444 if (plen > sizeof(random_store))
7445 break;
7446 if (got_random) {
7447 /* already processed a RANDOM */
7448 goto next_param;
7449 }
7450 phdr = sctp_get_next_param(m, offset,
7451 (struct sctp_paramhdr *)random_store,
7452 min(sizeof(random_store),plen));
7453 if (phdr == NULL)
7454 return (-26);
7455 p_random = (struct sctp_auth_random *)phdr;
7456 random_len = plen - sizeof(*p_random);
7457 /* enforce the random length */
7458 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
7459 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
7460 return (-27);
7461 }
7462 got_random = 1;
7463 } else if (ptype == SCTP_HMAC_LIST) {
7464 int num_hmacs;
7465 int i;
7467 if (plen > sizeof(hmacs_store))
7468 break;
7469 if (got_hmacs) {
7470 /* already processed a HMAC list */
7471 goto next_param;
7472 }
7473 phdr = sctp_get_next_param(m, offset,
7474 (struct sctp_paramhdr *)hmacs_store,
7475 min(plen,sizeof(hmacs_store)));
7476 if (phdr == NULL)
7477 return (-28);
7478 hmacs = (struct sctp_auth_hmac_algo *)phdr;
7479 hmacs_len = plen - sizeof(*hmacs);
7480 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
7481 /* validate the hmac list */
7482 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
7483 return (-29);
7484 }
7485 if (stcb->asoc.peer_hmacs != NULL)
7486 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
7487 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
7488 if (stcb->asoc.peer_hmacs != NULL) {
7489 for (i = 0; i < num_hmacs; i++) {
7490 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
7491 ntohs(hmacs->hmac_ids[i]));
7492 }
7493 }
7494 got_hmacs = 1;
7495 } else if (ptype == SCTP_CHUNK_LIST) {
7496 int i;
7498 if (plen > sizeof(chunks_store))
7499 break;
7500 if (got_chklist) {
7501 /* already processed a Chunks list */
7502 goto next_param;
7503 }
7504 phdr = sctp_get_next_param(m, offset,
7505 (struct sctp_paramhdr *)chunks_store,
7506 min(plen,sizeof(chunks_store)));
7507 if (phdr == NULL)
7508 return (-30);
7509 chunks = (struct sctp_auth_chunk_list *)phdr;
7510 num_chunks = plen - sizeof(*chunks);
7511 if (stcb->asoc.peer_auth_chunks != NULL)
7512 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
7513 else
7514 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
7515 for (i = 0; i < num_chunks; i++) {
7516 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
7517 stcb->asoc.peer_auth_chunks);
7518 /* record asconf/asconf-ack if listed */
7519 if (chunks->chunk_types[i] == SCTP_ASCONF)
7520 saw_asconf = 1;
7521 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
7522 saw_asconf_ack = 1;
7524 }
7525 got_chklist = 1;
7526 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
7527 (ptype == SCTP_STATE_COOKIE) ||
7528 (ptype == SCTP_UNRECOG_PARAM) ||
7529 (ptype == SCTP_COOKIE_PRESERVE) ||
7530 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
7531 (ptype == SCTP_ADD_IP_ADDRESS) ||
7532 (ptype == SCTP_DEL_IP_ADDRESS) ||
7533 (ptype == SCTP_ERROR_CAUSE_IND) ||
7534 (ptype == SCTP_SUCCESS_REPORT)) {
7535 /* don't care */ ;
7536 } else {
7537 if ((ptype & 0x8000) == 0x0000) {
7538 /*
7539 * must stop processing the rest of the
7540 * param's. Any report bits were handled
7541 * with the call to
7542 * sctp_arethere_unrecognized_parameters()
7543 * when the INIT or INIT-ACK was first seen.
7544 */
7545 break;
7546 }
7547 }
7549 next_param:
7550 offset += SCTP_SIZE32(plen);
7551 if (offset >= limit) {
7552 break;
7553 }
7554 phdr = sctp_get_next_param(m, offset, &parm_buf,
7555 sizeof(parm_buf));
7556 }
7557 /* Now check to see if we need to purge any addresses */
7558 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
7559 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
7560 SCTP_ADDR_NOT_IN_ASSOC) {
7561 /* This address has been removed from the asoc */
7562 /* remove and free it */
7563 stcb->asoc.numnets--;
7564 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
7565 sctp_free_remote_addr(net);
7566 if (net == stcb->asoc.primary_destination) {
7567 stcb->asoc.primary_destination = NULL;
7568 sctp_select_primary_destination(stcb);
7569 }
7570 }
7571 }
7572 if (ecn_allowed == 0) {
7573 stcb->asoc.ecn_allowed = 0;
7574 }
7575 /* validate authentication required parameters */
7576 if (got_random && got_hmacs) {
7577 stcb->asoc.peer_supports_auth = 1;
7578 } else {
7579 stcb->asoc.peer_supports_auth = 0;
7580 }
7581 if (!stcb->asoc.peer_supports_auth && got_chklist) {
7582 /* peer does not support auth but sent a chunks list? */
7583 return (-31);
7584 }
7585 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
7586 !stcb->asoc.peer_supports_auth) {
7587 /* peer supports asconf but not auth? */
7588 return (-32);
7589 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
7590 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
7591 return (-33);
7592 }
7593 /* concatenate the full random key */
7594 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
7595 if (chunks != NULL) {
7596 keylen += sizeof(*chunks) + num_chunks;
7597 }
7598 new_key = sctp_alloc_key(keylen);
7599 if (new_key != NULL) {
7600 /* copy in the RANDOM */
7601 if (p_random != NULL) {
7602 keylen = sizeof(*p_random) + random_len;
7603 bcopy(p_random, new_key->key, keylen);
7604 }
7605 /* append in the AUTH chunks */
7606 if (chunks != NULL) {
7607 bcopy(chunks, new_key->key + keylen,
7608 sizeof(*chunks) + num_chunks);
7609 keylen += sizeof(*chunks) + num_chunks;
7610 }
7611 /* append in the HMACs */
7612 if (hmacs != NULL) {
7613 bcopy(hmacs, new_key->key + keylen,
7614 sizeof(*hmacs) + hmacs_len);
7615 }
7616 } else {
7617 /* failed to get memory for the key */
7618 return (-34);
7619 }
7620 if (stcb->asoc.authinfo.peer_random != NULL)
7621 sctp_free_key(stcb->asoc.authinfo.peer_random);
7622 stcb->asoc.authinfo.peer_random = new_key;
7623 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
7624 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
7626 return (0);
7627 }
7629 int
7630 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
7631 struct sctp_nets *net)
7632 {
7633 /* make sure the requested primary address exists in the assoc */
7634 if (net == NULL && sa)
7635 net = sctp_findnet(stcb, sa);
7637 if (net == NULL) {
7638 /* didn't find the requested primary address! */
7639 return (-1);
7640 } else {
7641 /* set the primary address */
7642 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7643 /* Must be confirmed, so queue to set */
7644 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
7645 return (0);
7646 }
7647 stcb->asoc.primary_destination = net;
7648 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
7649 sctp_free_remote_addr(stcb->asoc.alternate);
7650 stcb->asoc.alternate = NULL;
7651 }
7652 net = TAILQ_FIRST(&stcb->asoc.nets);
7653 if (net != stcb->asoc.primary_destination) {
7654 /* first one on the list is NOT the primary
7655 * sctp_cmpaddr() is much more efficient if
7656 * the primary is the first on the list, make it
7657 * so.
7658 */
7659 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7660 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
7661 }
7662 return (0);
7663 }
7664 }
7666 int
7667 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
7668 {
7669 /*
7670 * This function serves two purposes. It will see if a TAG can be
7671 * re-used and return 1 for yes it is ok and 0 for don't use that
7672 * tag. A secondary function it will do is purge out old tags that
7673 * can be removed.
7674 */
7675 struct sctpvtaghead *chain;
7676 struct sctp_tagblock *twait_block;
7677 struct sctpasochead *head;
7678 struct sctp_tcb *stcb;
7679 int i;
7681 SCTP_INP_INFO_RLOCK();
7682 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
7683 SCTP_BASE_INFO(hashasocmark))];
7684 if (head == NULL) {
7685 /* invalid vtag */
7686 goto skip_vtag_check;
7687 }
7688 LIST_FOREACH(stcb, head, sctp_asocs) {
7689 /* We choose not to lock anything here. TCB's can't be
7690 * removed since we have the read lock, so they can't
7691 * be freed on us, same thing for the INP. I may
7692 * be wrong with this assumption, but we will go
7693 * with it for now :-)
7694 */
7695 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
7696 continue;
7697 }
7698 if (stcb->asoc.my_vtag == tag) {
7699 /* candidate */
7700 if (stcb->rport != rport) {
7701 continue;
7702 }
7703 if (stcb->sctp_ep->sctp_lport != lport) {
7704 continue;
7705 }
7706 /* Its a used tag set */
7707 SCTP_INP_INFO_RUNLOCK();
7708 return (0);
7709 }
7710 }
7711 skip_vtag_check:
7713 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
7714 /* Now what about timed wait ? */
7715 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
7716 /*
7717 * Block(s) are present, lets see if we have this tag in the
7718 * list
7719 */
7720 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
7721 if (twait_block->vtag_block[i].v_tag == 0) {
7722 /* not used */
7723 continue;
7724 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
7725 now->tv_sec) {
7726 /* Audit expires this guy */
7727 twait_block->vtag_block[i].tv_sec_at_expire = 0;
7728 twait_block->vtag_block[i].v_tag = 0;
7729 twait_block->vtag_block[i].lport = 0;
7730 twait_block->vtag_block[i].rport = 0;
7731 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
7732 (twait_block->vtag_block[i].lport == lport) &&
7733 (twait_block->vtag_block[i].rport == rport)) {
7734 /* Bad tag, sorry :< */
7735 SCTP_INP_INFO_RUNLOCK();
7736 return (0);
7737 }
7738 }
7739 }
7740 SCTP_INP_INFO_RUNLOCK();
7741 return (1);
7742 }
7744 static void
7745 sctp_drain_mbufs(struct sctp_tcb *stcb)
7746 {
7747 /*
7748 * We must hunt this association for MBUF's past the cumack (i.e.
7749 * out of order data that we can renege on).
7750 */
7751 struct sctp_association *asoc;
7752 struct sctp_tmit_chunk *chk, *nchk;
7753 uint32_t cumulative_tsn_p1;
7754 struct sctp_queued_to_read *ctl, *nctl;
7755 int cnt, strmat;
7756 uint32_t gap, i;
7757 int fnd = 0;
7759 /* We look for anything larger than the cum-ack + 1 */
7761 asoc = &stcb->asoc;
7762 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
7763 /* none we can reneg on. */
7764 return;
7765 }
7766 SCTP_STAT_INCR(sctps_protocol_drains_done);
7767 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
7768 cnt = 0;
7769 /* First look in the re-assembly queue */
7770 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
7771 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
7772 /* Yep it is above cum-ack */
7773 cnt++;
7774 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
7775 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
7776 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
7777 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7778 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
7779 if (chk->data) {
7780 sctp_m_freem(chk->data);
7781 chk->data = NULL;
7782 }
7783 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7784 }
7785 }
7786 /* Ok that was fun, now we will drain all the inbound streams? */
7787 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
7788 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
7789 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
7790 /* Yep it is above cum-ack */
7791 cnt++;
7792 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
7793 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
7794 sctp_ucount_decr(asoc->cnt_on_all_streams);
7795 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
7796 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
7797 if (ctl->data) {
7798 sctp_m_freem(ctl->data);
7799 ctl->data = NULL;
7800 }
7801 sctp_free_remote_addr(ctl->whoFrom);
7802 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
7803 SCTP_DECR_READQ_COUNT();
7804 }
7805 }
7806 }
7807 if (cnt) {
7808 /* We must back down to see what the new highest is */
7809 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
7810 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
7811 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
7812 asoc->highest_tsn_inside_map = i;
7813 fnd = 1;
7814 break;
7815 }
7816 }
7817 if (!fnd) {
7818 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7819 }
7821 /*
7822 * Question, should we go through the delivery queue? The only
7823 * reason things are on here is the app not reading OR a p-d-api up.
7824 * An attacker COULD send enough in to initiate the PD-API and then
7825 * send a bunch of stuff to other streams... these would wind up on
7826 * the delivery queue.. and then we would not get to them. But in
7827 * order to do this I then have to back-track and un-deliver
7828 * sequence numbers in streams.. el-yucko. I think for now we will
7829 * NOT look at the delivery queue and leave it to be something to
7830 * consider later. An alternative would be to abort the P-D-API with
7831 * a notification and then deliver the data.... Or another method
7832 * might be to keep track of how many times the situation occurs and
7833 * if we see a possible attack underway just abort the association.
7834 */
7835 #ifdef SCTP_DEBUG
7836 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7837 #endif
7838 /*
7839 * Now do we need to find a new
7840 * asoc->highest_tsn_inside_map?
7841 */
7842 asoc->last_revoke_count = cnt;
7843 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7844 /*sa_ignore NO_NULL_CHK*/
7845 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7846 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7847 }
7848 /*
7849 * Another issue, in un-setting the TSN's in the mapping array we
7850 * DID NOT adjust the highest_tsn marker. This will cause one of two
7851 * things to occur. It may cause us to do extra work in checking for
7852 * our mapping array movement. More importantly it may cause us to
7853 * SACK every datagram. This may not be a bad thing though since we
7854 * will recover once we get our cum-ack above and all this stuff we
7855 * dumped recovered.
7856 */
7857 }
7859 void
7860 sctp_drain()
7861 {
7862 /*
7863 * We must walk the PCB lists for ALL associations here. The system
7864 * is LOW on MBUF's and needs help. This is where reneging will
7865 * occur. We really hope this does NOT happen!
7866 */
7867 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7868 VNET_ITERATOR_DECL(vnet_iter);
7869 #else
7870 struct sctp_inpcb *inp;
7871 struct sctp_tcb *stcb;
7873 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7874 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7875 return;
7876 }
7877 #endif
7878 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7879 VNET_LIST_RLOCK_NOSLEEP();
7880 VNET_FOREACH(vnet_iter) {
7881 CURVNET_SET(vnet_iter);
7882 struct sctp_inpcb *inp;
7883 struct sctp_tcb *stcb;
7884 #endif
7886 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7887 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7888 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7889 #ifdef VIMAGE
7890 continue;
7891 #else
7892 return;
7893 #endif
7894 }
7895 #endif
7896 SCTP_INP_INFO_RLOCK();
7897 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7898 /* For each endpoint */
7899 SCTP_INP_RLOCK(inp);
7900 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7901 /* For each association */
7902 SCTP_TCB_LOCK(stcb);
7903 sctp_drain_mbufs(stcb);
7904 SCTP_TCB_UNLOCK(stcb);
7905 }
7906 SCTP_INP_RUNLOCK(inp);
7907 }
7908 SCTP_INP_INFO_RUNLOCK();
7909 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7910 CURVNET_RESTORE();
7911 }
7912 VNET_LIST_RUNLOCK_NOSLEEP();
7913 #endif
7914 }
7916 /*
7917 * start a new iterator
7918 * iterates through all endpoints and associations based on the pcb_state
7919 * flags and asoc_state. "af" (mandatory) is executed for all matching
7920 * assocs and "ef" (optional) is executed when the iterator completes.
7921 * "inpf" (optional) is executed for each new endpoint as it is being
7922 * iterated through. inpe (optional) is called when the inp completes
7923 * its way through all the stcbs.
7924 */
7925 int
7926 sctp_initiate_iterator(inp_func inpf,
7927 asoc_func af,
7928 inp_func inpe,
7929 uint32_t pcb_state,
7930 uint32_t pcb_features,
7931 uint32_t asoc_state,
7932 void *argp,
7933 uint32_t argi,
7934 end_func ef,
7935 struct sctp_inpcb *s_inp,
7936 uint8_t chunk_output_off)
7937 {
7938 struct sctp_iterator *it = NULL;
7940 if (af == NULL) {
7941 return (-1);
7942 }
7943 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7944 SCTP_M_ITER);
7945 if (it == NULL) {
7946 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7947 return (ENOMEM);
7948 }
7949 memset(it, 0, sizeof(*it));
7950 it->function_assoc = af;
7951 it->function_inp = inpf;
7952 if (inpf)
7953 it->done_current_ep = 0;
7954 else
7955 it->done_current_ep = 1;
7956 it->function_atend = ef;
7957 it->pointer = argp;
7958 it->val = argi;
7959 it->pcb_flags = pcb_state;
7960 it->pcb_features = pcb_features;
7961 it->asoc_state = asoc_state;
7962 it->function_inp_end = inpe;
7963 it->no_chunk_output = chunk_output_off;
7964 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
7965 it->vn = curvnet;
7966 #endif
7967 if (s_inp) {
7968 /* Assume lock is held here */
7969 it->inp = s_inp;
7970 SCTP_INP_INCR_REF(it->inp);
7971 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7972 } else {
7973 SCTP_INP_INFO_RLOCK();
7974 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7975 if (it->inp) {
7976 SCTP_INP_INCR_REF(it->inp);
7977 }
7978 SCTP_INP_INFO_RUNLOCK();
7979 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7981 }
7982 SCTP_IPI_ITERATOR_WQ_LOCK();
7984 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7985 if (sctp_it_ctl.iterator_running == 0) {
7986 sctp_wakeup_iterator();
7987 }
7988 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7989 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7990 return (0);
7991 }
