1/*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */
32
33#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */
32
33#include <sys/cdefs.h>
|
34__FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 197173 2009-09-13 17:45:31Z rrs $");
| 34__FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 197288 2009-09-17 15:11:12Z rrs $");
|
35
36#include <netinet/sctp_os.h>
37#include <sys/proc.h>
38#include <netinet/sctp_var.h>
39#include <netinet/sctp_sysctl.h>
40#include <netinet/sctp_pcb.h>
41#include <netinet/sctputil.h>
42#include <netinet/sctp.h>
43#include <netinet/sctp_header.h>
44#include <netinet/sctp_asconf.h>
45#include <netinet/sctp_output.h>
46#include <netinet/sctp_timer.h>
47#include <netinet/sctp_bsd_addr.h>
48#include <netinet/udp.h>
49
50
| 35
36#include <netinet/sctp_os.h>
37#include <sys/proc.h>
38#include <netinet/sctp_var.h>
39#include <netinet/sctp_sysctl.h>
40#include <netinet/sctp_pcb.h>
41#include <netinet/sctputil.h>
42#include <netinet/sctp.h>
43#include <netinet/sctp_header.h>
44#include <netinet/sctp_asconf.h>
45#include <netinet/sctp_output.h>
46#include <netinet/sctp_timer.h>
47#include <netinet/sctp_bsd_addr.h>
48#include <netinet/udp.h>
49
50
|
51struct sctp_base_info system_base_info;
| 51VNET_DEFINE(struct sctp_base_info, system_base_info);
|
52
53/* FIX: we don't handle multiple link local scopes */
54/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
55#ifdef INET6
56int
57SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
58{
59 struct sockaddr_in6 tmp_a, tmp_b;
60
61 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
| 52
53/* FIX: we don't handle multiple link local scopes */
54/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
55#ifdef INET6
56int
57SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
58{
59 struct sockaddr_in6 tmp_a, tmp_b;
60
61 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
|
62 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
| 62 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
|
63 return 0;
64 }
65 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
| 63 return 0;
64 }
65 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
|
66 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
| 66 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
|
67 return 0;
68 }
69 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
70}
71
72#endif
73
74void
75sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
76{
77 /*
78 * We really don't need to lock this, but I will just because it
79 * does not hurt.
80 */
81 SCTP_INP_INFO_RLOCK();
82 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
83 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
84 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
85 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
86 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
87 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
88 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
89 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
90
91 SCTP_INP_INFO_RUNLOCK();
92}
93
94/*
95 * Addresses are added to VRF's (Virtual Router's). For BSD we
96 * have only the default VRF 0. We maintain a hash list of
97 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
98 * these has a list of addresses. When we add a new address
99 * to a VRF we lookup the ifn/ifn_index, if the ifn does
100 * not exist we create it and add it to the list of IFN's
101 * within the VRF. Once we have the sctp_ifn, we add the
102 * address to the list. So we look something like:
103 *
104 * hash-vrf-table
105 * vrf-> ifn-> ifn -> ifn
106 * vrf |
107 * ... +--ifa-> ifa -> ifa
108 * vrf
109 *
110 * We keep these seperate lists since the SCTP subsystem will
111 * point to these from its source address selection nets structure.
112 * When an address is deleted it does not happen right away on
113 * the SCTP side, it gets scheduled. What we do when a
114 * delete happens is immediately remove the address from
115 * the master list and decrement the refcount. As our
116 * addip iterator works through and frees the src address
117 * selection pointing to the sctp_ifa, eventually the refcount
118 * will reach 0 and we will delete it. Note that it is assumed
119 * that any locking on system level ifn/ifa is done at the
120 * caller of these functions and these routines will only
121 * lock the SCTP structures as they add or delete things.
122 *
123 * Other notes on VRF concepts.
124 * - An endpoint can be in multiple VRF's
125 * - An association lives within a VRF and only one VRF.
126 * - Any incoming packet we can deduce the VRF for by
127 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
128 * - Any downward send call or connect call must supply the
129 * VRF via ancillary data or via some sort of set default
130 * VRF socket option call (again for BSD no brainer since
131 * the VRF is always 0).
132 * - An endpoint may add multiple VRF's to it.
133 * - Listening sockets can accept associations in any
134 * of the VRF's they are in but the assoc will end up
135 * in only one VRF (gotten from the packet or connect/send).
136 *
137 */
138
139struct sctp_vrf *
140sctp_allocate_vrf(int vrf_id)
141{
142 struct sctp_vrf *vrf = NULL;
143 struct sctp_vrflist *bucket;
144
145 /* First allocate the VRF structure */
146 vrf = sctp_find_vrf(vrf_id);
147 if (vrf) {
148 /* Already allocated */
149 return (vrf);
150 }
151 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
152 SCTP_M_VRF);
153 if (vrf == NULL) {
154 /* No memory */
155#ifdef INVARIANTS
156 panic("No memory for VRF:%d", vrf_id);
157#endif
158 return (NULL);
159 }
160 /* setup the VRF */
161 memset(vrf, 0, sizeof(struct sctp_vrf));
162 vrf->vrf_id = vrf_id;
163 LIST_INIT(&vrf->ifnlist);
164 vrf->total_ifa_count = 0;
165 vrf->refcount = 0;
166 /* now also setup table ids */
167 SCTP_INIT_VRF_TABLEID(vrf);
168 /* Init the HASH of addresses */
169 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
170 &vrf->vrf_addr_hashmark);
171 if (vrf->vrf_addr_hash == NULL) {
172 /* No memory */
173#ifdef INVARIANTS
174 panic("No memory for VRF:%d", vrf_id);
175#endif
176 SCTP_FREE(vrf, SCTP_M_VRF);
177 return (NULL);
178 }
179 /* Add it to the hash table */
180 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
181 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
182 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
183 return (vrf);
184}
185
186
187struct sctp_ifn *
188sctp_find_ifn(void *ifn, uint32_t ifn_index)
189{
190 struct sctp_ifn *sctp_ifnp;
191 struct sctp_ifnlist *hash_ifn_head;
192
193 /*
194 * We assume the lock is held for the addresses if thats wrong
195 * problems could occur :-)
196 */
197 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
198 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
199 if (sctp_ifnp->ifn_index == ifn_index) {
200 return (sctp_ifnp);
201 }
202 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
203 return (sctp_ifnp);
204 }
205 }
206 return (NULL);
207}
208
209
210
211struct sctp_vrf *
212sctp_find_vrf(uint32_t vrf_id)
213{
214 struct sctp_vrflist *bucket;
215 struct sctp_vrf *liste;
216
217 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
218 LIST_FOREACH(liste, bucket, next_vrf) {
219 if (vrf_id == liste->vrf_id) {
220 return (liste);
221 }
222 }
223 return (NULL);
224}
225
226void
227sctp_free_vrf(struct sctp_vrf *vrf)
228{
229 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
230 if (vrf->vrf_addr_hash) {
231 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
232 vrf->vrf_addr_hash = NULL;
233 }
234 /* We zero'd the count */
235 LIST_REMOVE(vrf, next_vrf);
236 SCTP_FREE(vrf, SCTP_M_VRF);
237 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
238 }
239}
240
241void
242sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
243{
244 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
245 /* We zero'd the count */
246 if (sctp_ifnp->vrf) {
247 sctp_free_vrf(sctp_ifnp->vrf);
248 }
249 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
250 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
251 }
252}
253
254void
255sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
256{
257 struct sctp_ifn *sctp_ifnp;
258
259 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
260 if (sctp_ifnp != NULL) {
261 sctp_ifnp->ifn_mtu = mtu;
262 }
263}
264
265
266void
267sctp_free_ifa(struct sctp_ifa *sctp_ifap)
268{
269 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
270 /* We zero'd the count */
271 if (sctp_ifap->ifn_p) {
272 sctp_free_ifn(sctp_ifap->ifn_p);
273 }
274 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
275 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
276 }
277}
278
279static void
280sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
281{
282 struct sctp_ifn *found;
283
284 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
285 if (found == NULL) {
286 /* Not in the list.. sorry */
287 return;
288 }
289 if (hold_addr_lock == 0)
290 SCTP_IPI_ADDR_WLOCK();
291 LIST_REMOVE(sctp_ifnp, next_bucket);
292 LIST_REMOVE(sctp_ifnp, next_ifn);
293 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
294 sctp_ifnp->registered_af);
295 if (hold_addr_lock == 0)
296 SCTP_IPI_ADDR_WUNLOCK();
297 /* Take away the reference, and possibly free it */
298 sctp_free_ifn(sctp_ifnp);
299}
300
301void
302sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
303 const char *if_name, uint32_t ifn_index)
304{
305 struct sctp_vrf *vrf;
306 struct sctp_ifa *sctp_ifap = NULL;
307
308 SCTP_IPI_ADDR_RLOCK();
309 vrf = sctp_find_vrf(vrf_id);
310 if (vrf == NULL) {
311 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
312 goto out;
313
314 }
315 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
316 if (sctp_ifap == NULL) {
317 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
318 goto out;
319 }
320 if (sctp_ifap->ifn_p == NULL) {
321 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
322 goto out;
323 }
324 if (if_name) {
325 int len1, len2;
326
327 len1 = strlen(if_name);
328 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
329 if (len1 != len2) {
330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
331 len1, len2);
332 goto out;
333 }
334 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
335 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
336 sctp_ifap->ifn_p->ifn_name,
337 if_name);
338 goto out;
339 }
340 } else {
341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
343 sctp_ifap->ifn_p->ifn_index, ifn_index);
344 goto out;
345 }
346 }
347
348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
350out:
351 SCTP_IPI_ADDR_RUNLOCK();
352}
353
354void
355sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
356 const char *if_name, uint32_t ifn_index)
357{
358 struct sctp_vrf *vrf;
359 struct sctp_ifa *sctp_ifap = NULL;
360
361 SCTP_IPI_ADDR_RLOCK();
362 vrf = sctp_find_vrf(vrf_id);
363 if (vrf == NULL) {
364 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
365 goto out;
366
367 }
368 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
369 if (sctp_ifap == NULL) {
370 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
371 goto out;
372 }
373 if (sctp_ifap->ifn_p == NULL) {
374 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
375 goto out;
376 }
377 if (if_name) {
378 int len1, len2;
379
380 len1 = strlen(if_name);
381 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
382 if (len1 != len2) {
383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
384 len1, len2);
385 goto out;
386 }
387 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
388 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
389 sctp_ifap->ifn_p->ifn_name,
390 if_name);
391 goto out;
392 }
393 } else {
394 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
395 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
396 sctp_ifap->ifn_p->ifn_index, ifn_index);
397 goto out;
398 }
399 }
400
401 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
402 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
403out:
404 SCTP_IPI_ADDR_RUNLOCK();
405}
406
407/*-
408 * Add an ifa to an ifn.
409 * Register the interface as necessary.
410 * NOTE: ADDR write lock MUST be held.
411 */
412static void
413sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
414{
415 int ifa_af;
416
417 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
418 sctp_ifap->ifn_p = sctp_ifnp;
419 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
420 /* update address counts */
421 sctp_ifnp->ifa_count++;
422 ifa_af = sctp_ifap->address.sa.sa_family;
423 if (ifa_af == AF_INET)
424 sctp_ifnp->num_v4++;
425 else
426 sctp_ifnp->num_v6++;
427 if (sctp_ifnp->ifa_count == 1) {
428 /* register the new interface */
429 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
430 sctp_ifnp->registered_af = ifa_af;
431 }
432}
433
434/*-
435 * Remove an ifa from its ifn.
436 * If no more addresses exist, remove the ifn too. Otherwise, re-register
437 * the interface based on the remaining address families left.
438 * NOTE: ADDR write lock MUST be held.
439 */
440static void
441sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
442{
443 uint32_t ifn_index;
444
445 LIST_REMOVE(sctp_ifap, next_ifa);
446 if (sctp_ifap->ifn_p) {
447 /* update address counts */
448 sctp_ifap->ifn_p->ifa_count--;
449 if (sctp_ifap->address.sa.sa_family == AF_INET6)
450 sctp_ifap->ifn_p->num_v6--;
451 else if (sctp_ifap->address.sa.sa_family == AF_INET)
452 sctp_ifap->ifn_p->num_v4--;
453
454 ifn_index = sctp_ifap->ifn_p->ifn_index;
455 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
456 /* remove the ifn, possibly freeing it */
457 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
458 } else {
459 /* re-register address family type, if needed */
460 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
461 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
462 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
463 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
464 sctp_ifap->ifn_p->registered_af = AF_INET;
465 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
466 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
467 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
468 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
469 sctp_ifap->ifn_p->registered_af = AF_INET6;
470 }
471 /* free the ifn refcount */
472 sctp_free_ifn(sctp_ifap->ifn_p);
473 }
474 sctp_ifap->ifn_p = NULL;
475 }
476}
477
478struct sctp_ifa *
479sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
480 uint32_t ifn_type, const char *if_name, void *ifa,
481 struct sockaddr *addr, uint32_t ifa_flags,
482 int dynamic_add)
483{
484 struct sctp_vrf *vrf;
485 struct sctp_ifn *sctp_ifnp = NULL;
486 struct sctp_ifa *sctp_ifap = NULL;
487 struct sctp_ifalist *hash_addr_head;
488 struct sctp_ifnlist *hash_ifn_head;
489 uint32_t hash_of_addr;
490 int new_ifn_af = 0;
491
492#ifdef SCTP_DEBUG
493 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
494 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
495#endif
496 SCTP_IPI_ADDR_WLOCK();
497 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
498 if (sctp_ifnp) {
499 vrf = sctp_ifnp->vrf;
500 } else {
501 vrf = sctp_find_vrf(vrf_id);
502 if (vrf == NULL) {
503 vrf = sctp_allocate_vrf(vrf_id);
504 if (vrf == NULL) {
505 SCTP_IPI_ADDR_WUNLOCK();
506 return (NULL);
507 }
508 }
509 }
510 if (sctp_ifnp == NULL) {
511 /*
512 * build one and add it, can't hold lock until after malloc
513 * done though.
514 */
515 SCTP_IPI_ADDR_WUNLOCK();
516 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
517 sizeof(struct sctp_ifn), SCTP_M_IFN);
518 if (sctp_ifnp == NULL) {
519#ifdef INVARIANTS
520 panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
521#endif
522 return (NULL);
523 }
524 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
525 sctp_ifnp->ifn_index = ifn_index;
526 sctp_ifnp->ifn_p = ifn;
527 sctp_ifnp->ifn_type = ifn_type;
528 sctp_ifnp->refcount = 0;
529 sctp_ifnp->vrf = vrf;
530 atomic_add_int(&vrf->refcount, 1);
531 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
532 if (if_name != NULL) {
533 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
534 } else {
535 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
536 }
537 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
538 LIST_INIT(&sctp_ifnp->ifalist);
539 SCTP_IPI_ADDR_WLOCK();
540 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
541 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
542 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
543 new_ifn_af = 1;
544 }
545 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
546 if (sctp_ifap) {
547 /* Hmm, it already exists? */
548 if ((sctp_ifap->ifn_p) &&
549 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
550 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
551 sctp_ifap->ifn_p->ifn_name, ifn_index,
552 sctp_ifap);
553 if (new_ifn_af) {
554 /* Remove the created one that we don't want */
555 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
556 }
557 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
558 /* easy to solve, just switch back to active */
559 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
560 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
561 sctp_ifap->ifn_p = sctp_ifnp;
562 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
563 }
564 exit_stage_left:
565 SCTP_IPI_ADDR_WUNLOCK();
566 return (sctp_ifap);
567 } else {
568 if (sctp_ifap->ifn_p) {
569 /*
570 * The last IFN gets the address, removee
571 * the old one
572 */
573 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
574 sctp_ifap, sctp_ifap->ifn_p->ifn_name,
575 sctp_ifap->ifn_p->ifn_index, if_name,
576 ifn_index);
577 /* remove the address from the old ifn */
578 sctp_remove_ifa_from_ifn(sctp_ifap);
579 /* move the address over to the new ifn */
580 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
581 goto exit_stage_left;
582 } else {
583 /* repair ifnp which was NULL ? */
584 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
585 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
586 sctp_ifnp, sctp_ifap);
587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
588 }
589 goto exit_stage_left;
590 }
591 }
592 SCTP_IPI_ADDR_WUNLOCK();
593 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
594 if (sctp_ifap == NULL) {
595#ifdef INVARIANTS
596 panic("No memory for IFA");
597#endif
598 return (NULL);
599 }
600 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
601 sctp_ifap->ifn_p = sctp_ifnp;
602 atomic_add_int(&sctp_ifnp->refcount, 1);
603 sctp_ifap->vrf_id = vrf_id;
604 sctp_ifap->ifa = ifa;
605 memcpy(&sctp_ifap->address, addr, addr->sa_len);
606 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
607 sctp_ifap->flags = ifa_flags;
608 /* Set scope */
609 switch (sctp_ifap->address.sa.sa_family) {
610 case AF_INET:
611 {
612 struct sockaddr_in *sin;
613
614 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
615 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
616 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
617 sctp_ifap->src_is_loop = 1;
618 }
619 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
620 sctp_ifap->src_is_priv = 1;
621 }
622 sctp_ifnp->num_v4++;
623 if (new_ifn_af)
624 new_ifn_af = AF_INET;
625 break;
626 }
627#ifdef INET6
628 case AF_INET6:
629 {
630 /* ok to use deprecated addresses? */
631 struct sockaddr_in6 *sin6;
632
633 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
634 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
635 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
636 sctp_ifap->src_is_loop = 1;
637 }
638 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
639 sctp_ifap->src_is_priv = 1;
640 }
641 sctp_ifnp->num_v6++;
642 if (new_ifn_af)
643 new_ifn_af = AF_INET6;
644 break;
645 }
646#endif
647 default:
648 new_ifn_af = 0;
649 break;
650 }
651 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
652
653 if ((sctp_ifap->src_is_priv == 0) &&
654 (sctp_ifap->src_is_loop == 0)) {
655 sctp_ifap->src_is_glob = 1;
656 }
657 SCTP_IPI_ADDR_WLOCK();
658 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
659 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
660 sctp_ifap->refcount = 1;
661 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
662 sctp_ifnp->ifa_count++;
663 vrf->total_ifa_count++;
664 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
665 if (new_ifn_af) {
666 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
667 sctp_ifnp->registered_af = new_ifn_af;
668 }
669 SCTP_IPI_ADDR_WUNLOCK();
670 if (dynamic_add) {
671 /*
672 * Bump up the refcount so that when the timer completes it
673 * will drop back down.
674 */
675 struct sctp_laddr *wi;
676
677 atomic_add_int(&sctp_ifap->refcount, 1);
678 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
679 if (wi == NULL) {
680 /*
681 * Gak, what can we do? We have lost an address
682 * change can you say HOSED?
683 */
684 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
685 /* Opps, must decrement the count */
686 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
687 if_name);
688 return (NULL);
689 }
690 SCTP_INCR_LADDR_COUNT();
691 bzero(wi, sizeof(*wi));
692 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
693 wi->ifa = sctp_ifap;
694 wi->action = SCTP_ADD_IP_ADDRESS;
695 SCTP_IPI_ITERATOR_WQ_LOCK();
696 /*
697 * Should this really be a tailq? As it is we will process
698 * the newest first :-0
699 */
700 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
701 SCTP_IPI_ITERATOR_WQ_UNLOCK();
702 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
703 (struct sctp_inpcb *)NULL,
704 (struct sctp_tcb *)NULL,
705 (struct sctp_nets *)NULL);
706 } else {
707 /* it's ready for use */
708 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
709 }
710 return (sctp_ifap);
711}
712
713void
714sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
715 uint32_t ifn_index, const char *if_name)
716{
717 struct sctp_vrf *vrf;
718 struct sctp_ifa *sctp_ifap = NULL;
719
720 SCTP_IPI_ADDR_WLOCK();
721 vrf = sctp_find_vrf(vrf_id);
722 if (vrf == NULL) {
723 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
724 goto out_now;
725 }
726#ifdef SCTP_DEBUG
727 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
728 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
729#endif
730 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
731 if (sctp_ifap) {
732 /* Validate the delete */
733 if (sctp_ifap->ifn_p) {
734 int valid = 0;
735
736 /*-
737 * The name has priority over the ifn_index
738 * if its given. We do this especially for
739 * panda who might recycle indexes fast.
740 */
741 if (if_name) {
742 int len1, len2;
743
744 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
745 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
746 if (len1 && len2 && (len1 == len2)) {
747 /* we can compare them */
748 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
749 /*
750 * They match its a correct
751 * delete
752 */
753 valid = 1;
754 }
755 }
756 }
757 if (!valid) {
758 /* last ditch check ifn_index */
759 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
760 valid = 1;
761 }
762 }
763 if (!valid) {
764 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
765 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
767 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
768 SCTP_IPI_ADDR_WUNLOCK();
769 return;
770 }
771 }
772 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
773 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
774 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
775 vrf->total_ifa_count--;
776 LIST_REMOVE(sctp_ifap, next_bucket);
777 sctp_remove_ifa_from_ifn(sctp_ifap);
778 }
779#ifdef SCTP_DEBUG
780 else {
781 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
782 ifn_index);
783 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
784 }
785#endif
786
787out_now:
788 SCTP_IPI_ADDR_WUNLOCK();
789 if (sctp_ifap) {
790 struct sctp_laddr *wi;
791
792 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
793 if (wi == NULL) {
794 /*
795 * Gak, what can we do? We have lost an address
796 * change can you say HOSED?
797 */
798 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
799
800 /* Oops, must decrement the count */
801 sctp_free_ifa(sctp_ifap);
802 return;
803 }
804 SCTP_INCR_LADDR_COUNT();
805 bzero(wi, sizeof(*wi));
806 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
807 wi->ifa = sctp_ifap;
808 wi->action = SCTP_DEL_IP_ADDRESS;
809 SCTP_IPI_ITERATOR_WQ_LOCK();
810 /*
811 * Should this really be a tailq? As it is we will process
812 * the newest first :-0
813 */
814 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
815 SCTP_IPI_ITERATOR_WQ_UNLOCK();
816
817 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
818 (struct sctp_inpcb *)NULL,
819 (struct sctp_tcb *)NULL,
820 (struct sctp_nets *)NULL);
821 }
822 return;
823}
824
825
826static struct sctp_tcb *
827sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
828 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
829{
830 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
831 /*
832 * If we support the TCP model, then we must now dig through to see
833 * if we can find our endpoint in the list of tcp ep's.
834 */
835 uint16_t lport, rport;
836 struct sctppcbhead *ephead;
837 struct sctp_inpcb *inp;
838 struct sctp_laddr *laddr;
839 struct sctp_tcb *stcb;
840 struct sctp_nets *net;
841
842 if ((to == NULL) || (from == NULL)) {
843 return (NULL);
844 }
845 if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
846 lport = ((struct sockaddr_in *)to)->sin_port;
847 rport = ((struct sockaddr_in *)from)->sin_port;
848 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
849 lport = ((struct sockaddr_in6 *)to)->sin6_port;
850 rport = ((struct sockaddr_in6 *)from)->sin6_port;
851 } else {
852 return NULL;
853 }
854 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
855 /*
856 * Ok now for each of the guys in this bucket we must look and see:
857 * - Does the remote port match. - Does there single association's
858 * addresses match this address (to). If so we update p_ep to point
859 * to this ep and return the tcb from it.
860 */
861 LIST_FOREACH(inp, ephead, sctp_hash) {
862 SCTP_INP_RLOCK(inp);
863 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
864 SCTP_INP_RUNLOCK(inp);
865 continue;
866 }
867 if (lport != inp->sctp_lport) {
868 SCTP_INP_RUNLOCK(inp);
869 continue;
870 }
871 if (inp->def_vrf_id != vrf_id) {
872 SCTP_INP_RUNLOCK(inp);
873 continue;
874 }
875 /* check to see if the ep has one of the addresses */
876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
877 /* We are NOT bound all, so look further */
878 int match = 0;
879
880 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
881
882 if (laddr->ifa == NULL) {
883 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
884 continue;
885 }
886 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
887 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
888 continue;
889 }
890 if (laddr->ifa->address.sa.sa_family ==
891 to->sa_family) {
892 /* see if it matches */
893 struct sockaddr_in *intf_addr, *sin;
894
895 intf_addr = &laddr->ifa->address.sin;
896 sin = (struct sockaddr_in *)to;
897 if (from->sa_family == AF_INET) {
898 if (sin->sin_addr.s_addr ==
899 intf_addr->sin_addr.s_addr) {
900 match = 1;
901 break;
902 }
903 }
904#ifdef INET6
905 if (from->sa_family == AF_INET6) {
906 struct sockaddr_in6 *intf_addr6;
907 struct sockaddr_in6 *sin6;
908
909 sin6 = (struct sockaddr_in6 *)
910 to;
911 intf_addr6 = &laddr->ifa->address.sin6;
912
913 if (SCTP6_ARE_ADDR_EQUAL(sin6,
914 intf_addr6)) {
915 match = 1;
916 break;
917 }
918 }
919#endif
920 }
921 }
922 if (match == 0) {
923 /* This endpoint does not have this address */
924 SCTP_INP_RUNLOCK(inp);
925 continue;
926 }
927 }
928 /*
929 * Ok if we hit here the ep has the address, does it hold
930 * the tcb?
931 */
932
933 stcb = LIST_FIRST(&inp->sctp_asoc_list);
934 if (stcb == NULL) {
935 SCTP_INP_RUNLOCK(inp);
936 continue;
937 }
938 SCTP_TCB_LOCK(stcb);
939 if (stcb->rport != rport) {
940 /* remote port does not match. */
941 SCTP_TCB_UNLOCK(stcb);
942 SCTP_INP_RUNLOCK(inp);
943 continue;
944 }
945 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
946 SCTP_TCB_UNLOCK(stcb);
947 SCTP_INP_RUNLOCK(inp);
948 continue;
949 }
950 /* Does this TCB have a matching address? */
951 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
952
953 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
954 /* not the same family, can't be a match */
955 continue;
956 }
957 switch (from->sa_family) {
958 case AF_INET:
959 {
960 struct sockaddr_in *sin, *rsin;
961
962 sin = (struct sockaddr_in *)&net->ro._l_addr;
963 rsin = (struct sockaddr_in *)from;
964 if (sin->sin_addr.s_addr ==
965 rsin->sin_addr.s_addr) {
966 /* found it */
967 if (netp != NULL) {
968 *netp = net;
969 }
970 /*
971 * Update the endpoint
972 * pointer
973 */
974 *inp_p = inp;
975 SCTP_INP_RUNLOCK(inp);
976 return (stcb);
977 }
978 break;
979 }
980#ifdef INET6
981 case AF_INET6:
982 {
983 struct sockaddr_in6 *sin6, *rsin6;
984
985 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
986 rsin6 = (struct sockaddr_in6 *)from;
987 if (SCTP6_ARE_ADDR_EQUAL(sin6,
988 rsin6)) {
989 /* found it */
990 if (netp != NULL) {
991 *netp = net;
992 }
993 /*
994 * Update the endpoint
995 * pointer
996 */
997 *inp_p = inp;
998 SCTP_INP_RUNLOCK(inp);
999 return (stcb);
1000 }
1001 break;
1002 }
1003#endif
1004 default:
1005 /* TSNH */
1006 break;
1007 }
1008 }
1009 SCTP_TCB_UNLOCK(stcb);
1010 SCTP_INP_RUNLOCK(inp);
1011 }
1012 return (NULL);
1013}
1014
1015/*
1016 * rules for use
1017 *
1018 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1019 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1020 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1021 * NULL.
1022 */
1023
1024struct sctp_tcb *
1025sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1026 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1027{
1028 struct sctpasochead *head;
1029 struct sctp_inpcb *inp;
1030 struct sctp_tcb *stcb = NULL;
1031 struct sctp_nets *net;
1032 uint16_t rport;
1033
1034 inp = *inp_p;
1035 if (remote->sa_family == AF_INET) {
1036 rport = (((struct sockaddr_in *)remote)->sin_port);
1037 } else if (remote->sa_family == AF_INET6) {
1038 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1039 } else {
1040 return (NULL);
1041 }
1042 if (locked_tcb) {
1043 /*
1044 * UN-lock so we can do proper locking here this occurs when
1045 * called from load_addresses_from_init.
1046 */
1047 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1048 SCTP_TCB_UNLOCK(locked_tcb);
1049 }
1050 SCTP_INP_INFO_RLOCK();
1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1052 /*-
1053 * Now either this guy is our listener or it's the
1054 * connector. If it is the one that issued the connect, then
1055 * it's only chance is to be the first TCB in the list. If
1056 * it is the acceptor, then do the special_lookup to hash
1057 * and find the real inp.
1058 */
1059 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1060 /* to is peer addr, from is my addr */
1061 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1062 netp, inp->def_vrf_id);
1063 if ((stcb != NULL) && (locked_tcb == NULL)) {
1064 /* we have a locked tcb, lower refcount */
1065 SCTP_INP_DECR_REF(inp);
1066 }
1067 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1068 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1069 SCTP_TCB_LOCK(locked_tcb);
1070 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1071 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1072 }
1073 SCTP_INP_INFO_RUNLOCK();
1074 return (stcb);
1075 } else {
1076 SCTP_INP_WLOCK(inp);
1077 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1078 goto null_return;
1079 }
1080 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1081 if (stcb == NULL) {
1082 goto null_return;
1083 }
1084 SCTP_TCB_LOCK(stcb);
1085
1086 if (stcb->rport != rport) {
1087 /* remote port does not match. */
1088 SCTP_TCB_UNLOCK(stcb);
1089 goto null_return;
1090 }
1091 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1092 SCTP_TCB_UNLOCK(stcb);
1093 goto null_return;
1094 }
1095 /* now look at the list of remote addresses */
1096 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1097#ifdef INVARIANTS
1098 if (net == (TAILQ_NEXT(net, sctp_next))) {
1099 panic("Corrupt net list");
1100 }
1101#endif
1102 if (net->ro._l_addr.sa.sa_family !=
1103 remote->sa_family) {
1104 /* not the same family */
1105 continue;
1106 }
1107 switch (remote->sa_family) {
1108 case AF_INET:
1109 {
1110 struct sockaddr_in *sin,
1111 *rsin;
1112
1113 sin = (struct sockaddr_in *)
1114 &net->ro._l_addr;
1115 rsin = (struct sockaddr_in *)remote;
1116 if (sin->sin_addr.s_addr ==
1117 rsin->sin_addr.s_addr) {
1118 /* found it */
1119 if (netp != NULL) {
1120 *netp = net;
1121 }
1122 if (locked_tcb == NULL) {
1123 SCTP_INP_DECR_REF(inp);
1124 } else if (locked_tcb != stcb) {
1125 SCTP_TCB_LOCK(locked_tcb);
1126 }
1127 if (locked_tcb) {
1128 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1129 }
1130 SCTP_INP_WUNLOCK(inp);
1131 SCTP_INP_INFO_RUNLOCK();
1132 return (stcb);
1133 }
1134 break;
1135 }
1136#ifdef INET6
1137 case AF_INET6:
1138 {
1139 struct sockaddr_in6 *sin6,
1140 *rsin6;
1141
1142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1143 rsin6 = (struct sockaddr_in6 *)remote;
1144 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1145 rsin6)) {
1146 /* found it */
1147 if (netp != NULL) {
1148 *netp = net;
1149 }
1150 if (locked_tcb == NULL) {
1151 SCTP_INP_DECR_REF(inp);
1152 } else if (locked_tcb != stcb) {
1153 SCTP_TCB_LOCK(locked_tcb);
1154 }
1155 if (locked_tcb) {
1156 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1157 }
1158 SCTP_INP_WUNLOCK(inp);
1159 SCTP_INP_INFO_RUNLOCK();
1160 return (stcb);
1161 }
1162 break;
1163 }
1164#endif
1165 default:
1166 /* TSNH */
1167 break;
1168 }
1169 }
1170 SCTP_TCB_UNLOCK(stcb);
1171 }
1172 } else {
1173 SCTP_INP_WLOCK(inp);
1174 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1175 goto null_return;
1176 }
1177 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1178 inp->sctp_hashmark)];
1179 if (head == NULL) {
1180 goto null_return;
1181 }
1182 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1183 if (stcb->rport != rport) {
1184 /* remote port does not match */
1185 continue;
1186 }
1187 SCTP_TCB_LOCK(stcb);
1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189 SCTP_TCB_UNLOCK(stcb);
1190 continue;
1191 }
1192 /* now look at the list of remote addresses */
1193 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1194#ifdef INVARIANTS
1195 if (net == (TAILQ_NEXT(net, sctp_next))) {
1196 panic("Corrupt net list");
1197 }
1198#endif
1199 if (net->ro._l_addr.sa.sa_family !=
1200 remote->sa_family) {
1201 /* not the same family */
1202 continue;
1203 }
1204 switch (remote->sa_family) {
1205 case AF_INET:
1206 {
1207 struct sockaddr_in *sin,
1208 *rsin;
1209
1210 sin = (struct sockaddr_in *)
1211 &net->ro._l_addr;
1212 rsin = (struct sockaddr_in *)remote;
1213 if (sin->sin_addr.s_addr ==
1214 rsin->sin_addr.s_addr) {
1215 /* found it */
1216 if (netp != NULL) {
1217 *netp = net;
1218 }
1219 if (locked_tcb == NULL) {
1220 SCTP_INP_DECR_REF(inp);
1221 } else if (locked_tcb != stcb) {
1222 SCTP_TCB_LOCK(locked_tcb);
1223 }
1224 if (locked_tcb) {
1225 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1226 }
1227 SCTP_INP_WUNLOCK(inp);
1228 SCTP_INP_INFO_RUNLOCK();
1229 return (stcb);
1230 }
1231 break;
1232 }
1233#ifdef INET6
1234 case AF_INET6:
1235 {
1236 struct sockaddr_in6 *sin6,
1237 *rsin6;
1238
1239 sin6 = (struct sockaddr_in6 *)
1240 &net->ro._l_addr;
1241 rsin6 = (struct sockaddr_in6 *)remote;
1242 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1243 rsin6)) {
1244 /* found it */
1245 if (netp != NULL) {
1246 *netp = net;
1247 }
1248 if (locked_tcb == NULL) {
1249 SCTP_INP_DECR_REF(inp);
1250 } else if (locked_tcb != stcb) {
1251 SCTP_TCB_LOCK(locked_tcb);
1252 }
1253 if (locked_tcb) {
1254 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1255 }
1256 SCTP_INP_WUNLOCK(inp);
1257 SCTP_INP_INFO_RUNLOCK();
1258 return (stcb);
1259 }
1260 break;
1261 }
1262#endif
1263 default:
1264 /* TSNH */
1265 break;
1266 }
1267 }
1268 SCTP_TCB_UNLOCK(stcb);
1269 }
1270 }
1271null_return:
1272 /* clean up for returning null */
1273 if (locked_tcb) {
1274 SCTP_TCB_LOCK(locked_tcb);
1275 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1276 }
1277 SCTP_INP_WUNLOCK(inp);
1278 SCTP_INP_INFO_RUNLOCK();
1279 /* not found */
1280 return (NULL);
1281}
1282
1283/*
1284 * Find an association for a specific endpoint using the association id given
1285 * out in the COMM_UP notification
1286 */
1287
1288struct sctp_tcb *
1289sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1290{
1291 /*
1292 * Use my the assoc_id to find a endpoint
1293 */
1294 struct sctpasochead *head;
1295 struct sctp_tcb *stcb;
1296 uint32_t id;
1297
1298 if (inp == NULL) {
1299 SCTP_PRINTF("TSNH ep_associd\n");
1300 return (NULL);
1301 }
1302 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1303 SCTP_PRINTF("TSNH ep_associd0\n");
1304 return (NULL);
1305 }
1306 id = (uint32_t) asoc_id;
1307 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1308 if (head == NULL) {
1309 /* invalid id TSNH */
1310 SCTP_PRINTF("TSNH ep_associd1\n");
1311 return (NULL);
1312 }
1313 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1314 if (stcb->asoc.assoc_id == id) {
1315 if (inp != stcb->sctp_ep) {
1316 /*
1317 * some other guy has the same id active (id
1318 * collision ??).
1319 */
1320 SCTP_PRINTF("TSNH ep_associd2\n");
1321 continue;
1322 }
1323 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1324 continue;
1325 }
1326 if (want_lock) {
1327 SCTP_TCB_LOCK(stcb);
1328 }
1329 return (stcb);
1330 }
1331 }
1332 return (NULL);
1333}
1334
1335
1336struct sctp_tcb *
1337sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1338{
1339 struct sctp_tcb *stcb;
1340
1341 SCTP_INP_RLOCK(inp);
1342 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1343 SCTP_INP_RUNLOCK(inp);
1344 return (stcb);
1345}
1346
1347
1348static struct sctp_inpcb *
1349sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1350 uint16_t lport, uint32_t vrf_id)
1351{
1352 struct sctp_inpcb *inp;
1353 struct sockaddr_in *sin;
1354
1355#ifdef INET6
1356 struct sockaddr_in6 *sin6;
1357
1358#endif
1359 struct sctp_laddr *laddr;
1360
1361#ifdef INET6
1362 struct sockaddr_in6 *intf_addr6;
1363
1364#endif
1365
1366 int fnd;
1367
1368 /*
1369 * Endpoing probe expects that the INP_INFO is locked.
1370 */
1371 sin = NULL;
1372#ifdef INET6
1373 sin6 = NULL;
1374#endif
1375 switch (nam->sa_family) {
1376 case AF_INET:
1377 sin = (struct sockaddr_in *)nam;
1378 break;
1379#ifdef INET6
1380 case AF_INET6:
1381 sin6 = (struct sockaddr_in6 *)nam;
1382 break;
1383#endif
1384 default:
1385 /* unsupported family */
1386 return (NULL);
1387 }
1388
1389 if (head == NULL)
1390 return (NULL);
1391
1392 LIST_FOREACH(inp, head, sctp_hash) {
1393 SCTP_INP_RLOCK(inp);
1394 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1395 SCTP_INP_RUNLOCK(inp);
1396 continue;
1397 }
1398 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1399 (inp->sctp_lport == lport)) {
1400 /* got it */
1401 if ((nam->sa_family == AF_INET) &&
1402 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1403 SCTP_IPV6_V6ONLY(inp)) {
1404 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1405 SCTP_INP_RUNLOCK(inp);
1406 continue;
1407 }
1408 /* A V6 address and the endpoint is NOT bound V6 */
1409 if (nam->sa_family == AF_INET6 &&
1410 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1411 SCTP_INP_RUNLOCK(inp);
1412 continue;
1413 }
1414 /* does a VRF id match? */
1415 fnd = 0;
1416 if (inp->def_vrf_id == vrf_id)
1417 fnd = 1;
1418
1419 SCTP_INP_RUNLOCK(inp);
1420 if (!fnd)
1421 continue;
1422 return (inp);
1423 }
1424 SCTP_INP_RUNLOCK(inp);
1425 }
1426 if ((nam->sa_family == AF_INET) &&
1427 (sin->sin_addr.s_addr == INADDR_ANY)) {
1428 /* Can't hunt for one that has no address specified */
1429 return (NULL);
1430 }
1431#ifdef INET6
1432 if ((nam->sa_family == AF_INET6) &&
1433 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1434 /* Can't hunt for one that has no address specified */
1435 return (NULL);
1436 }
1437#endif
1438 /*
1439 * ok, not bound to all so see if we can find a EP bound to this
1440 * address.
1441 */
1442 LIST_FOREACH(inp, head, sctp_hash) {
1443 SCTP_INP_RLOCK(inp);
1444 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1445 SCTP_INP_RUNLOCK(inp);
1446 continue;
1447 }
1448 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1449 SCTP_INP_RUNLOCK(inp);
1450 continue;
1451 }
1452 /*
1453 * Ok this could be a likely candidate, look at all of its
1454 * addresses
1455 */
1456 if (inp->sctp_lport != lport) {
1457 SCTP_INP_RUNLOCK(inp);
1458 continue;
1459 }
1460 /* does a VRF id match? */
1461 fnd = 0;
1462 if (inp->def_vrf_id == vrf_id)
1463 fnd = 1;
1464
1465 if (!fnd) {
1466 SCTP_INP_RUNLOCK(inp);
1467 continue;
1468 }
1469 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1470 if (laddr->ifa == NULL) {
1471 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1472 __FUNCTION__);
1473 continue;
1474 }
1475 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1476 laddr->ifa);
1477 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1478 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1479 continue;
1480 }
1481 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1482 /* possible, see if it matches */
1483 struct sockaddr_in *intf_addr;
1484
1485 intf_addr = &laddr->ifa->address.sin;
1486 switch (nam->sa_family) {
1487 case AF_INET:
1488 if (sin->sin_addr.s_addr ==
1489 intf_addr->sin_addr.s_addr) {
1490 SCTP_INP_RUNLOCK(inp);
1491 return (inp);
1492 }
1493 break;
1494#ifdef INET6
1495 case AF_INET6:
1496 intf_addr6 = &laddr->ifa->address.sin6;
1497 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1498 intf_addr6)) {
1499 SCTP_INP_RUNLOCK(inp);
1500 return (inp);
1501 }
1502 break;
1503#endif
1504 }
1505 }
1506 }
1507 SCTP_INP_RUNLOCK(inp);
1508 }
1509 return (NULL);
1510}
1511
1512
1513static struct sctp_inpcb *
1514sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1515{
1516 struct sctppcbhead *head;
1517 struct sctp_inpcb *t_inp;
1518 int fnd;
1519
1520 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1521 SCTP_BASE_INFO(hashmark))];
1522 LIST_FOREACH(t_inp, head, sctp_hash) {
1523 if (t_inp->sctp_lport != lport) {
1524 continue;
1525 }
1526 /* is it in the VRF in question */
1527 fnd = 0;
1528 if (t_inp->def_vrf_id == vrf_id)
1529 fnd = 1;
1530 if (!fnd)
1531 continue;
1532
1533 /* This one is in use. */
1534 /* check the v6/v4 binding issue */
1535 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1536 SCTP_IPV6_V6ONLY(t_inp)) {
1537 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1538 /* collision in V6 space */
1539 return (t_inp);
1540 } else {
1541 /* inp is BOUND_V4 no conflict */
1542 continue;
1543 }
1544 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1545 /* t_inp is bound v4 and v6, conflict always */
1546 return (t_inp);
1547 } else {
1548 /* t_inp is bound only V4 */
1549 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1550 SCTP_IPV6_V6ONLY(inp)) {
1551 /* no conflict */
1552 continue;
1553 }
1554 /* else fall through to conflict */
1555 }
1556 return (t_inp);
1557 }
1558 return (NULL);
1559}
1560
1561
1562int
1563sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1564{
1565 /* For 1-2-1 with port reuse */
1566 struct sctppcbhead *head;
1567 struct sctp_inpcb *tinp;
1568
1569 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1570 /* only works with port reuse on */
1571 return (-1);
1572 }
1573 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1574 return (0);
1575 }
1576 SCTP_INP_RUNLOCK(inp);
1577 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1578 SCTP_BASE_INFO(hashmark))];
1579 /* Kick out all non-listeners to the TCP hash */
1580 LIST_FOREACH(tinp, head, sctp_hash) {
1581 if (tinp->sctp_lport != inp->sctp_lport) {
1582 continue;
1583 }
1584 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1585 continue;
1586 }
1587 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1588 continue;
1589 }
1590 if (tinp->sctp_socket->so_qlimit) {
1591 continue;
1592 }
1593 SCTP_INP_WLOCK(tinp);
1594 LIST_REMOVE(tinp, sctp_hash);
1595 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1596 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1597 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1598 SCTP_INP_WUNLOCK(tinp);
1599 }
1600 SCTP_INP_WLOCK(inp);
1601 /* Pull from where he was */
1602 LIST_REMOVE(inp, sctp_hash);
1603 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1604 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1605 LIST_INSERT_HEAD(head, inp, sctp_hash);
1606 SCTP_INP_WUNLOCK(inp);
1607 SCTP_INP_RLOCK(inp);
1608 return (0);
1609}
1610
1611
1612struct sctp_inpcb *
1613sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1614 uint32_t vrf_id)
1615{
1616 /*
1617 * First we check the hash table to see if someone has this port
1618 * bound with just the port.
1619 */
1620 struct sctp_inpcb *inp;
1621 struct sctppcbhead *head;
1622 struct sockaddr_in *sin;
1623 struct sockaddr_in6 *sin6;
1624 int lport;
1625
1626 if (nam->sa_family == AF_INET) {
1627 sin = (struct sockaddr_in *)nam;
1628 lport = ((struct sockaddr_in *)nam)->sin_port;
1629 } else if (nam->sa_family == AF_INET6) {
1630 sin6 = (struct sockaddr_in6 *)nam;
1631 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1632 } else {
1633 /* unsupported family */
1634 return (NULL);
1635 }
1636 /*
1637 * I could cheat here and just cast to one of the types but we will
1638 * do it right. It also provides the check against an Unsupported
1639 * type too.
1640 */
1641 /* Find the head of the ALLADDR chain */
1642 if (have_lock == 0) {
1643 SCTP_INP_INFO_RLOCK();
1644 }
1645 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1646 SCTP_BASE_INFO(hashmark))];
1647 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1648
1649 /*
1650 * If the TCP model exists it could be that the main listening
1651 * endpoint is gone but there exists a connected socket for this guy
1652 * yet. If so we can return the first one that we find. This may NOT
1653 * be the correct one so the caller should be wary on the return
1654 * INP. Currently the onlyc caller that sets this flag is in bindx
1655 * where we are verifying that a user CAN bind the address. He
1656 * either has bound it already, or someone else has, or its open to
1657 * bind, so this is good enough.
1658 */
1659 if (inp == NULL && find_tcp_pool) {
1660 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1661 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1662 }
1663 if (inp) {
1664 SCTP_INP_INCR_REF(inp);
1665 }
1666 if (have_lock == 0) {
1667 SCTP_INP_INFO_RUNLOCK();
1668 }
1669 return (inp);
1670}
1671
1672/*
1673 * Find an association for an endpoint with the pointer to whom you want to
1674 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1675 * need to change the *to to some other struct like a mbuf...
1676 */
1677struct sctp_tcb *
1678sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1679 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1680 uint32_t vrf_id)
1681{
1682 struct sctp_inpcb *inp = NULL;
1683 struct sctp_tcb *retval;
1684
1685 SCTP_INP_INFO_RLOCK();
1686 if (find_tcp_pool) {
1687 if (inp_p != NULL) {
1688 retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1689 vrf_id);
1690 } else {
1691 retval = sctp_tcb_special_locate(&inp, from, to, netp,
1692 vrf_id);
1693 }
1694 if (retval != NULL) {
1695 SCTP_INP_INFO_RUNLOCK();
1696 return (retval);
1697 }
1698 }
1699 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1700 if (inp_p != NULL) {
1701 *inp_p = inp;
1702 }
1703 SCTP_INP_INFO_RUNLOCK();
1704
1705 if (inp == NULL) {
1706 return (NULL);
1707 }
1708 /*
1709 * ok, we have an endpoint, now lets find the assoc for it (if any)
1710 * we now place the source address or from in the to of the find
1711 * endpoint call. Since in reality this chain is used from the
1712 * inbound packet side.
1713 */
1714 if (inp_p != NULL) {
1715 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1716 NULL);
1717 } else {
1718 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1719 NULL);
1720 }
1721 return retval;
1722}
1723
1724
1725/*
1726 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1727 * find all addresses that the sender has specified in any address list. Each
1728 * address will be used to lookup the TCB and see if one exits.
1729 */
1730static struct sctp_tcb *
1731sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1732 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1733 struct sockaddr *dest)
1734{
1735 struct sockaddr_in sin4;
1736 struct sockaddr_in6 sin6;
1737 struct sctp_paramhdr *phdr, parm_buf;
1738 struct sctp_tcb *retval;
1739 uint32_t ptype, plen;
1740
1741 memset(&sin4, 0, sizeof(sin4));
1742 memset(&sin6, 0, sizeof(sin6));
1743 sin4.sin_len = sizeof(sin4);
1744 sin4.sin_family = AF_INET;
1745 sin4.sin_port = sh->src_port;
1746 sin6.sin6_len = sizeof(sin6);
1747 sin6.sin6_family = AF_INET6;
1748 sin6.sin6_port = sh->src_port;
1749
1750 retval = NULL;
1751 offset += sizeof(struct sctp_init_chunk);
1752
1753 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1754 while (phdr != NULL) {
1755 /* now we must see if we want the parameter */
1756 ptype = ntohs(phdr->param_type);
1757 plen = ntohs(phdr->param_length);
1758 if (plen == 0) {
1759 break;
1760 }
1761 if (ptype == SCTP_IPV4_ADDRESS &&
1762 plen == sizeof(struct sctp_ipv4addr_param)) {
1763 /* Get the rest of the address */
1764 struct sctp_ipv4addr_param ip4_parm, *p4;
1765
1766 phdr = sctp_get_next_param(m, offset,
1767 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1768 if (phdr == NULL) {
1769 return (NULL);
1770 }
1771 p4 = (struct sctp_ipv4addr_param *)phdr;
1772 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1773 /* look it up */
1774 retval = sctp_findassociation_ep_addr(inp_p,
1775 (struct sockaddr *)&sin4, netp, dest, NULL);
1776 if (retval != NULL) {
1777 return (retval);
1778 }
1779 } else if (ptype == SCTP_IPV6_ADDRESS &&
1780 plen == sizeof(struct sctp_ipv6addr_param)) {
1781 /* Get the rest of the address */
1782 struct sctp_ipv6addr_param ip6_parm, *p6;
1783
1784 phdr = sctp_get_next_param(m, offset,
1785 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1786 if (phdr == NULL) {
1787 return (NULL);
1788 }
1789 p6 = (struct sctp_ipv6addr_param *)phdr;
1790 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1791 /* look it up */
1792 retval = sctp_findassociation_ep_addr(inp_p,
1793 (struct sockaddr *)&sin6, netp, dest, NULL);
1794 if (retval != NULL) {
1795 return (retval);
1796 }
1797 }
1798 offset += SCTP_SIZE32(plen);
1799 phdr = sctp_get_next_param(m, offset, &parm_buf,
1800 sizeof(parm_buf));
1801 }
1802 return (NULL);
1803}
1804
1805static int
1806sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1807{
1808 struct sctp_nets *net;
1809
1810 /*
1811 * Simple question, the ports match, does the tcb own the to
1812 * address?
1813 */
1814 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1815 /* of course */
1816 return (1);
1817 }
1818 /* have to look at all bound addresses */
1819 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1820 if (net->ro._l_addr.sa.sa_family != to->sa_family) {
1821 /* not the same family, can't be a match */
1822 continue;
1823 }
1824 switch (to->sa_family) {
1825 case AF_INET:
1826 {
1827 struct sockaddr_in *sin, *rsin;
1828
1829 sin = (struct sockaddr_in *)&net->ro._l_addr;
1830 rsin = (struct sockaddr_in *)to;
1831 if (sin->sin_addr.s_addr ==
1832 rsin->sin_addr.s_addr) {
1833 /* found it */
1834 return (1);
1835 }
1836 break;
1837 }
1838#ifdef INET6
1839 case AF_INET6:
1840 {
1841 struct sockaddr_in6 *sin6, *rsin6;
1842
1843 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1844 rsin6 = (struct sockaddr_in6 *)to;
1845 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1846 rsin6)) {
1847 /* Update the endpoint pointer */
1848 return (1);
1849 }
1850 break;
1851 }
1852#endif
1853 default:
1854 /* TSNH */
1855 break;
1856 }
1857 }
1858 /* Nope, do not have the address ;-( */
1859 return (0);
1860}
1861
1862static struct sctp_tcb *
1863sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1864 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1865 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1866{
1867 /*
1868 * Use my vtag to hash. If we find it we then verify the source addr
1869 * is in the assoc. If all goes well we save a bit on rec of a
1870 * packet.
1871 */
1872 struct sctpasochead *head;
1873 struct sctp_nets *net;
1874 struct sctp_tcb *stcb;
1875
1876 *netp = NULL;
1877 *inp_p = NULL;
1878 SCTP_INP_INFO_RLOCK();
1879 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1880 SCTP_BASE_INFO(hashasocmark))];
1881 if (head == NULL) {
1882 /* invalid vtag */
1883 SCTP_INP_INFO_RUNLOCK();
1884 return (NULL);
1885 }
1886 LIST_FOREACH(stcb, head, sctp_asocs) {
1887 SCTP_INP_RLOCK(stcb->sctp_ep);
1888 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1890 continue;
1891 }
1892 SCTP_TCB_LOCK(stcb);
1893 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1894 if (stcb->asoc.my_vtag == vtag) {
1895 /* candidate */
1896 if (stcb->rport != rport) {
1897 SCTP_TCB_UNLOCK(stcb);
1898 continue;
1899 }
1900 if (stcb->sctp_ep->sctp_lport != lport) {
1901 SCTP_TCB_UNLOCK(stcb);
1902 continue;
1903 }
1904 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1905 SCTP_TCB_UNLOCK(stcb);
1906 continue;
1907 }
1908 /* RRS:Need toaddr check here */
1909 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
1910 /* Endpoint does not own this address */
1911 SCTP_TCB_UNLOCK(stcb);
1912 continue;
1913 }
1914 if (remote_tag) {
1915 /*
1916 * If we have both vtags thats all we match
1917 * on
1918 */
1919 if (stcb->asoc.peer_vtag == remote_tag) {
1920 /*
1921 * If both tags match we consider it
1922 * conclusive and check NO
1923 * source/destination addresses
1924 */
1925 goto conclusive;
1926 }
1927 }
1928 if (skip_src_check) {
1929 conclusive:
1930 if (from) {
1931 net = sctp_findnet(stcb, from);
1932 } else {
1933 *netp = NULL; /* unknown */
1934 }
1935 if (inp_p)
1936 *inp_p = stcb->sctp_ep;
1937 SCTP_INP_INFO_RUNLOCK();
1938 return (stcb);
1939 }
1940 net = sctp_findnet(stcb, from);
1941 if (net) {
1942 /* yep its him. */
1943 *netp = net;
1944 SCTP_STAT_INCR(sctps_vtagexpress);
1945 *inp_p = stcb->sctp_ep;
1946 SCTP_INP_INFO_RUNLOCK();
1947 return (stcb);
1948 } else {
1949 /*
1950 * not him, this should only happen in rare
1951 * cases so I peg it.
1952 */
1953 SCTP_STAT_INCR(sctps_vtagbogus);
1954 }
1955 }
1956 SCTP_TCB_UNLOCK(stcb);
1957 }
1958 SCTP_INP_INFO_RUNLOCK();
1959 return (NULL);
1960}
1961
1962/*
1963 * Find an association with the pointer to the inbound IP packet. This can be
1964 * a IPv4 or IPv6 packet.
1965 */
1966struct sctp_tcb *
1967sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1968 struct sctphdr *sh, struct sctp_chunkhdr *ch,
1969 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1970{
1971 int find_tcp_pool;
1972 struct ip *iph;
1973 struct sctp_tcb *retval;
1974 struct sockaddr_storage to_store, from_store;
1975 struct sockaddr *to = (struct sockaddr *)&to_store;
1976 struct sockaddr *from = (struct sockaddr *)&from_store;
1977 struct sctp_inpcb *inp;
1978
1979 iph = mtod(m, struct ip *);
1980 switch (iph->ip_v) {
1981 case IPVERSION:
1982 {
1983 /* its IPv4 */
1984 struct sockaddr_in *from4;
1985
1986 from4 = (struct sockaddr_in *)&from_store;
1987 bzero(from4, sizeof(*from4));
1988 from4->sin_family = AF_INET;
1989 from4->sin_len = sizeof(struct sockaddr_in);
1990 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1991 from4->sin_port = sh->src_port;
1992 break;
1993 }
1994#ifdef INET6
1995 case IPV6_VERSION >> 4:
1996 {
1997 /* its IPv6 */
1998 struct ip6_hdr *ip6;
1999 struct sockaddr_in6 *from6;
2000
2001 ip6 = mtod(m, struct ip6_hdr *);
2002 from6 = (struct sockaddr_in6 *)&from_store;
2003 bzero(from6, sizeof(*from6));
2004 from6->sin6_family = AF_INET6;
2005 from6->sin6_len = sizeof(struct sockaddr_in6);
2006 from6->sin6_addr = ip6->ip6_src;
2007 from6->sin6_port = sh->src_port;
2008 /* Get the scopes in properly to the sin6 addr's */
2009 /* we probably don't need these operations */
2010 (void)sa6_recoverscope(from6);
| 67 return 0;
68 }
69 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
70}
71
72#endif
73
74void
75sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
76{
77 /*
78 * We really don't need to lock this, but I will just because it
79 * does not hurt.
80 */
81 SCTP_INP_INFO_RLOCK();
82 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
83 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
84 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
85 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
86 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
87 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
88 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
89 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
90
91 SCTP_INP_INFO_RUNLOCK();
92}
93
94/*
95 * Addresses are added to VRF's (Virtual Router's). For BSD we
96 * have only the default VRF 0. We maintain a hash list of
97 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
98 * these has a list of addresses. When we add a new address
99 * to a VRF we lookup the ifn/ifn_index, if the ifn does
100 * not exist we create it and add it to the list of IFN's
101 * within the VRF. Once we have the sctp_ifn, we add the
102 * address to the list. So we look something like:
103 *
104 * hash-vrf-table
105 * vrf-> ifn-> ifn -> ifn
106 * vrf |
107 * ... +--ifa-> ifa -> ifa
108 * vrf
109 *
110 * We keep these seperate lists since the SCTP subsystem will
111 * point to these from its source address selection nets structure.
112 * When an address is deleted it does not happen right away on
113 * the SCTP side, it gets scheduled. What we do when a
114 * delete happens is immediately remove the address from
115 * the master list and decrement the refcount. As our
116 * addip iterator works through and frees the src address
117 * selection pointing to the sctp_ifa, eventually the refcount
118 * will reach 0 and we will delete it. Note that it is assumed
119 * that any locking on system level ifn/ifa is done at the
120 * caller of these functions and these routines will only
121 * lock the SCTP structures as they add or delete things.
122 *
123 * Other notes on VRF concepts.
124 * - An endpoint can be in multiple VRF's
125 * - An association lives within a VRF and only one VRF.
126 * - Any incoming packet we can deduce the VRF for by
127 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
128 * - Any downward send call or connect call must supply the
129 * VRF via ancillary data or via some sort of set default
130 * VRF socket option call (again for BSD no brainer since
131 * the VRF is always 0).
132 * - An endpoint may add multiple VRF's to it.
133 * - Listening sockets can accept associations in any
134 * of the VRF's they are in but the assoc will end up
135 * in only one VRF (gotten from the packet or connect/send).
136 *
137 */
138
139struct sctp_vrf *
140sctp_allocate_vrf(int vrf_id)
141{
142 struct sctp_vrf *vrf = NULL;
143 struct sctp_vrflist *bucket;
144
145 /* First allocate the VRF structure */
146 vrf = sctp_find_vrf(vrf_id);
147 if (vrf) {
148 /* Already allocated */
149 return (vrf);
150 }
151 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
152 SCTP_M_VRF);
153 if (vrf == NULL) {
154 /* No memory */
155#ifdef INVARIANTS
156 panic("No memory for VRF:%d", vrf_id);
157#endif
158 return (NULL);
159 }
160 /* setup the VRF */
161 memset(vrf, 0, sizeof(struct sctp_vrf));
162 vrf->vrf_id = vrf_id;
163 LIST_INIT(&vrf->ifnlist);
164 vrf->total_ifa_count = 0;
165 vrf->refcount = 0;
166 /* now also setup table ids */
167 SCTP_INIT_VRF_TABLEID(vrf);
168 /* Init the HASH of addresses */
169 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
170 &vrf->vrf_addr_hashmark);
171 if (vrf->vrf_addr_hash == NULL) {
172 /* No memory */
173#ifdef INVARIANTS
174 panic("No memory for VRF:%d", vrf_id);
175#endif
176 SCTP_FREE(vrf, SCTP_M_VRF);
177 return (NULL);
178 }
179 /* Add it to the hash table */
180 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
181 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
182 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
183 return (vrf);
184}
185
186
187struct sctp_ifn *
188sctp_find_ifn(void *ifn, uint32_t ifn_index)
189{
190 struct sctp_ifn *sctp_ifnp;
191 struct sctp_ifnlist *hash_ifn_head;
192
193 /*
194 * We assume the lock is held for the addresses if thats wrong
195 * problems could occur :-)
196 */
197 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
198 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
199 if (sctp_ifnp->ifn_index == ifn_index) {
200 return (sctp_ifnp);
201 }
202 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
203 return (sctp_ifnp);
204 }
205 }
206 return (NULL);
207}
208
209
210
211struct sctp_vrf *
212sctp_find_vrf(uint32_t vrf_id)
213{
214 struct sctp_vrflist *bucket;
215 struct sctp_vrf *liste;
216
217 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
218 LIST_FOREACH(liste, bucket, next_vrf) {
219 if (vrf_id == liste->vrf_id) {
220 return (liste);
221 }
222 }
223 return (NULL);
224}
225
226void
227sctp_free_vrf(struct sctp_vrf *vrf)
228{
229 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
230 if (vrf->vrf_addr_hash) {
231 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
232 vrf->vrf_addr_hash = NULL;
233 }
234 /* We zero'd the count */
235 LIST_REMOVE(vrf, next_vrf);
236 SCTP_FREE(vrf, SCTP_M_VRF);
237 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
238 }
239}
240
241void
242sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
243{
244 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
245 /* We zero'd the count */
246 if (sctp_ifnp->vrf) {
247 sctp_free_vrf(sctp_ifnp->vrf);
248 }
249 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
250 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
251 }
252}
253
254void
255sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
256{
257 struct sctp_ifn *sctp_ifnp;
258
259 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
260 if (sctp_ifnp != NULL) {
261 sctp_ifnp->ifn_mtu = mtu;
262 }
263}
264
265
266void
267sctp_free_ifa(struct sctp_ifa *sctp_ifap)
268{
269 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
270 /* We zero'd the count */
271 if (sctp_ifap->ifn_p) {
272 sctp_free_ifn(sctp_ifap->ifn_p);
273 }
274 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
275 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
276 }
277}
278
279static void
280sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
281{
282 struct sctp_ifn *found;
283
284 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
285 if (found == NULL) {
286 /* Not in the list.. sorry */
287 return;
288 }
289 if (hold_addr_lock == 0)
290 SCTP_IPI_ADDR_WLOCK();
291 LIST_REMOVE(sctp_ifnp, next_bucket);
292 LIST_REMOVE(sctp_ifnp, next_ifn);
293 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
294 sctp_ifnp->registered_af);
295 if (hold_addr_lock == 0)
296 SCTP_IPI_ADDR_WUNLOCK();
297 /* Take away the reference, and possibly free it */
298 sctp_free_ifn(sctp_ifnp);
299}
300
301void
302sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
303 const char *if_name, uint32_t ifn_index)
304{
305 struct sctp_vrf *vrf;
306 struct sctp_ifa *sctp_ifap = NULL;
307
308 SCTP_IPI_ADDR_RLOCK();
309 vrf = sctp_find_vrf(vrf_id);
310 if (vrf == NULL) {
311 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
312 goto out;
313
314 }
315 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
316 if (sctp_ifap == NULL) {
317 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
318 goto out;
319 }
320 if (sctp_ifap->ifn_p == NULL) {
321 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
322 goto out;
323 }
324 if (if_name) {
325 int len1, len2;
326
327 len1 = strlen(if_name);
328 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
329 if (len1 != len2) {
330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
331 len1, len2);
332 goto out;
333 }
334 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
335 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
336 sctp_ifap->ifn_p->ifn_name,
337 if_name);
338 goto out;
339 }
340 } else {
341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
343 sctp_ifap->ifn_p->ifn_index, ifn_index);
344 goto out;
345 }
346 }
347
348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
350out:
351 SCTP_IPI_ADDR_RUNLOCK();
352}
353
354void
355sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
356 const char *if_name, uint32_t ifn_index)
357{
358 struct sctp_vrf *vrf;
359 struct sctp_ifa *sctp_ifap = NULL;
360
361 SCTP_IPI_ADDR_RLOCK();
362 vrf = sctp_find_vrf(vrf_id);
363 if (vrf == NULL) {
364 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
365 goto out;
366
367 }
368 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
369 if (sctp_ifap == NULL) {
370 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
371 goto out;
372 }
373 if (sctp_ifap->ifn_p == NULL) {
374 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
375 goto out;
376 }
377 if (if_name) {
378 int len1, len2;
379
380 len1 = strlen(if_name);
381 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
382 if (len1 != len2) {
383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
384 len1, len2);
385 goto out;
386 }
387 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
388 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
389 sctp_ifap->ifn_p->ifn_name,
390 if_name);
391 goto out;
392 }
393 } else {
394 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
395 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
396 sctp_ifap->ifn_p->ifn_index, ifn_index);
397 goto out;
398 }
399 }
400
401 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
402 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
403out:
404 SCTP_IPI_ADDR_RUNLOCK();
405}
406
407/*-
408 * Add an ifa to an ifn.
409 * Register the interface as necessary.
410 * NOTE: ADDR write lock MUST be held.
411 */
412static void
413sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
414{
415 int ifa_af;
416
417 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
418 sctp_ifap->ifn_p = sctp_ifnp;
419 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
420 /* update address counts */
421 sctp_ifnp->ifa_count++;
422 ifa_af = sctp_ifap->address.sa.sa_family;
423 if (ifa_af == AF_INET)
424 sctp_ifnp->num_v4++;
425 else
426 sctp_ifnp->num_v6++;
427 if (sctp_ifnp->ifa_count == 1) {
428 /* register the new interface */
429 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
430 sctp_ifnp->registered_af = ifa_af;
431 }
432}
433
434/*-
435 * Remove an ifa from its ifn.
436 * If no more addresses exist, remove the ifn too. Otherwise, re-register
437 * the interface based on the remaining address families left.
438 * NOTE: ADDR write lock MUST be held.
439 */
440static void
441sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
442{
443 uint32_t ifn_index;
444
445 LIST_REMOVE(sctp_ifap, next_ifa);
446 if (sctp_ifap->ifn_p) {
447 /* update address counts */
448 sctp_ifap->ifn_p->ifa_count--;
449 if (sctp_ifap->address.sa.sa_family == AF_INET6)
450 sctp_ifap->ifn_p->num_v6--;
451 else if (sctp_ifap->address.sa.sa_family == AF_INET)
452 sctp_ifap->ifn_p->num_v4--;
453
454 ifn_index = sctp_ifap->ifn_p->ifn_index;
455 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
456 /* remove the ifn, possibly freeing it */
457 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
458 } else {
459 /* re-register address family type, if needed */
460 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
461 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
462 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
463 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
464 sctp_ifap->ifn_p->registered_af = AF_INET;
465 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
466 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
467 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
468 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
469 sctp_ifap->ifn_p->registered_af = AF_INET6;
470 }
471 /* free the ifn refcount */
472 sctp_free_ifn(sctp_ifap->ifn_p);
473 }
474 sctp_ifap->ifn_p = NULL;
475 }
476}
477
478struct sctp_ifa *
479sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
480 uint32_t ifn_type, const char *if_name, void *ifa,
481 struct sockaddr *addr, uint32_t ifa_flags,
482 int dynamic_add)
483{
484 struct sctp_vrf *vrf;
485 struct sctp_ifn *sctp_ifnp = NULL;
486 struct sctp_ifa *sctp_ifap = NULL;
487 struct sctp_ifalist *hash_addr_head;
488 struct sctp_ifnlist *hash_ifn_head;
489 uint32_t hash_of_addr;
490 int new_ifn_af = 0;
491
492#ifdef SCTP_DEBUG
493 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
494 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
495#endif
496 SCTP_IPI_ADDR_WLOCK();
497 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
498 if (sctp_ifnp) {
499 vrf = sctp_ifnp->vrf;
500 } else {
501 vrf = sctp_find_vrf(vrf_id);
502 if (vrf == NULL) {
503 vrf = sctp_allocate_vrf(vrf_id);
504 if (vrf == NULL) {
505 SCTP_IPI_ADDR_WUNLOCK();
506 return (NULL);
507 }
508 }
509 }
510 if (sctp_ifnp == NULL) {
511 /*
512 * build one and add it, can't hold lock until after malloc
513 * done though.
514 */
515 SCTP_IPI_ADDR_WUNLOCK();
516 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
517 sizeof(struct sctp_ifn), SCTP_M_IFN);
518 if (sctp_ifnp == NULL) {
519#ifdef INVARIANTS
520 panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
521#endif
522 return (NULL);
523 }
524 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
525 sctp_ifnp->ifn_index = ifn_index;
526 sctp_ifnp->ifn_p = ifn;
527 sctp_ifnp->ifn_type = ifn_type;
528 sctp_ifnp->refcount = 0;
529 sctp_ifnp->vrf = vrf;
530 atomic_add_int(&vrf->refcount, 1);
531 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
532 if (if_name != NULL) {
533 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
534 } else {
535 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
536 }
537 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
538 LIST_INIT(&sctp_ifnp->ifalist);
539 SCTP_IPI_ADDR_WLOCK();
540 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
541 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
542 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
543 new_ifn_af = 1;
544 }
545 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
546 if (sctp_ifap) {
547 /* Hmm, it already exists? */
548 if ((sctp_ifap->ifn_p) &&
549 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
550 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
551 sctp_ifap->ifn_p->ifn_name, ifn_index,
552 sctp_ifap);
553 if (new_ifn_af) {
554 /* Remove the created one that we don't want */
555 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
556 }
557 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
558 /* easy to solve, just switch back to active */
559 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
560 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
561 sctp_ifap->ifn_p = sctp_ifnp;
562 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
563 }
564 exit_stage_left:
565 SCTP_IPI_ADDR_WUNLOCK();
566 return (sctp_ifap);
567 } else {
568 if (sctp_ifap->ifn_p) {
569 /*
570 * The last IFN gets the address, removee
571 * the old one
572 */
573 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
574 sctp_ifap, sctp_ifap->ifn_p->ifn_name,
575 sctp_ifap->ifn_p->ifn_index, if_name,
576 ifn_index);
577 /* remove the address from the old ifn */
578 sctp_remove_ifa_from_ifn(sctp_ifap);
579 /* move the address over to the new ifn */
580 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
581 goto exit_stage_left;
582 } else {
583 /* repair ifnp which was NULL ? */
584 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
585 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
586 sctp_ifnp, sctp_ifap);
587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
588 }
589 goto exit_stage_left;
590 }
591 }
592 SCTP_IPI_ADDR_WUNLOCK();
593 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
594 if (sctp_ifap == NULL) {
595#ifdef INVARIANTS
596 panic("No memory for IFA");
597#endif
598 return (NULL);
599 }
600 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
601 sctp_ifap->ifn_p = sctp_ifnp;
602 atomic_add_int(&sctp_ifnp->refcount, 1);
603 sctp_ifap->vrf_id = vrf_id;
604 sctp_ifap->ifa = ifa;
605 memcpy(&sctp_ifap->address, addr, addr->sa_len);
606 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
607 sctp_ifap->flags = ifa_flags;
608 /* Set scope */
609 switch (sctp_ifap->address.sa.sa_family) {
610 case AF_INET:
611 {
612 struct sockaddr_in *sin;
613
614 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
615 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
616 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
617 sctp_ifap->src_is_loop = 1;
618 }
619 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
620 sctp_ifap->src_is_priv = 1;
621 }
622 sctp_ifnp->num_v4++;
623 if (new_ifn_af)
624 new_ifn_af = AF_INET;
625 break;
626 }
627#ifdef INET6
628 case AF_INET6:
629 {
630 /* ok to use deprecated addresses? */
631 struct sockaddr_in6 *sin6;
632
633 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
634 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
635 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
636 sctp_ifap->src_is_loop = 1;
637 }
638 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
639 sctp_ifap->src_is_priv = 1;
640 }
641 sctp_ifnp->num_v6++;
642 if (new_ifn_af)
643 new_ifn_af = AF_INET6;
644 break;
645 }
646#endif
647 default:
648 new_ifn_af = 0;
649 break;
650 }
651 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
652
653 if ((sctp_ifap->src_is_priv == 0) &&
654 (sctp_ifap->src_is_loop == 0)) {
655 sctp_ifap->src_is_glob = 1;
656 }
657 SCTP_IPI_ADDR_WLOCK();
658 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
659 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
660 sctp_ifap->refcount = 1;
661 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
662 sctp_ifnp->ifa_count++;
663 vrf->total_ifa_count++;
664 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
665 if (new_ifn_af) {
666 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
667 sctp_ifnp->registered_af = new_ifn_af;
668 }
669 SCTP_IPI_ADDR_WUNLOCK();
670 if (dynamic_add) {
671 /*
672 * Bump up the refcount so that when the timer completes it
673 * will drop back down.
674 */
675 struct sctp_laddr *wi;
676
677 atomic_add_int(&sctp_ifap->refcount, 1);
678 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
679 if (wi == NULL) {
680 /*
681 * Gak, what can we do? We have lost an address
682 * change can you say HOSED?
683 */
684 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
685 /* Opps, must decrement the count */
686 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
687 if_name);
688 return (NULL);
689 }
690 SCTP_INCR_LADDR_COUNT();
691 bzero(wi, sizeof(*wi));
692 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
693 wi->ifa = sctp_ifap;
694 wi->action = SCTP_ADD_IP_ADDRESS;
695 SCTP_IPI_ITERATOR_WQ_LOCK();
696 /*
697 * Should this really be a tailq? As it is we will process
698 * the newest first :-0
699 */
700 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
701 SCTP_IPI_ITERATOR_WQ_UNLOCK();
702 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
703 (struct sctp_inpcb *)NULL,
704 (struct sctp_tcb *)NULL,
705 (struct sctp_nets *)NULL);
706 } else {
707 /* it's ready for use */
708 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
709 }
710 return (sctp_ifap);
711}
712
713void
714sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
715 uint32_t ifn_index, const char *if_name)
716{
717 struct sctp_vrf *vrf;
718 struct sctp_ifa *sctp_ifap = NULL;
719
720 SCTP_IPI_ADDR_WLOCK();
721 vrf = sctp_find_vrf(vrf_id);
722 if (vrf == NULL) {
723 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
724 goto out_now;
725 }
726#ifdef SCTP_DEBUG
727 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
728 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
729#endif
730 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
731 if (sctp_ifap) {
732 /* Validate the delete */
733 if (sctp_ifap->ifn_p) {
734 int valid = 0;
735
736 /*-
737 * The name has priority over the ifn_index
738 * if its given. We do this especially for
739 * panda who might recycle indexes fast.
740 */
741 if (if_name) {
742 int len1, len2;
743
744 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
745 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
746 if (len1 && len2 && (len1 == len2)) {
747 /* we can compare them */
748 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
749 /*
750 * They match its a correct
751 * delete
752 */
753 valid = 1;
754 }
755 }
756 }
757 if (!valid) {
758 /* last ditch check ifn_index */
759 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
760 valid = 1;
761 }
762 }
763 if (!valid) {
764 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
765 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
767 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
768 SCTP_IPI_ADDR_WUNLOCK();
769 return;
770 }
771 }
772 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
773 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
774 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
775 vrf->total_ifa_count--;
776 LIST_REMOVE(sctp_ifap, next_bucket);
777 sctp_remove_ifa_from_ifn(sctp_ifap);
778 }
779#ifdef SCTP_DEBUG
780 else {
781 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
782 ifn_index);
783 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
784 }
785#endif
786
787out_now:
788 SCTP_IPI_ADDR_WUNLOCK();
789 if (sctp_ifap) {
790 struct sctp_laddr *wi;
791
792 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
793 if (wi == NULL) {
794 /*
795 * Gak, what can we do? We have lost an address
796 * change can you say HOSED?
797 */
798 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
799
800 /* Oops, must decrement the count */
801 sctp_free_ifa(sctp_ifap);
802 return;
803 }
804 SCTP_INCR_LADDR_COUNT();
805 bzero(wi, sizeof(*wi));
806 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
807 wi->ifa = sctp_ifap;
808 wi->action = SCTP_DEL_IP_ADDRESS;
809 SCTP_IPI_ITERATOR_WQ_LOCK();
810 /*
811 * Should this really be a tailq? As it is we will process
812 * the newest first :-0
813 */
814 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
815 SCTP_IPI_ITERATOR_WQ_UNLOCK();
816
817 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
818 (struct sctp_inpcb *)NULL,
819 (struct sctp_tcb *)NULL,
820 (struct sctp_nets *)NULL);
821 }
822 return;
823}
824
825
826static struct sctp_tcb *
827sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
828 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
829{
830 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
831 /*
832 * If we support the TCP model, then we must now dig through to see
833 * if we can find our endpoint in the list of tcp ep's.
834 */
835 uint16_t lport, rport;
836 struct sctppcbhead *ephead;
837 struct sctp_inpcb *inp;
838 struct sctp_laddr *laddr;
839 struct sctp_tcb *stcb;
840 struct sctp_nets *net;
841
842 if ((to == NULL) || (from == NULL)) {
843 return (NULL);
844 }
845 if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
846 lport = ((struct sockaddr_in *)to)->sin_port;
847 rport = ((struct sockaddr_in *)from)->sin_port;
848 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
849 lport = ((struct sockaddr_in6 *)to)->sin6_port;
850 rport = ((struct sockaddr_in6 *)from)->sin6_port;
851 } else {
852 return NULL;
853 }
854 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
855 /*
856 * Ok now for each of the guys in this bucket we must look and see:
857 * - Does the remote port match. - Does there single association's
858 * addresses match this address (to). If so we update p_ep to point
859 * to this ep and return the tcb from it.
860 */
861 LIST_FOREACH(inp, ephead, sctp_hash) {
862 SCTP_INP_RLOCK(inp);
863 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
864 SCTP_INP_RUNLOCK(inp);
865 continue;
866 }
867 if (lport != inp->sctp_lport) {
868 SCTP_INP_RUNLOCK(inp);
869 continue;
870 }
871 if (inp->def_vrf_id != vrf_id) {
872 SCTP_INP_RUNLOCK(inp);
873 continue;
874 }
875 /* check to see if the ep has one of the addresses */
876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
877 /* We are NOT bound all, so look further */
878 int match = 0;
879
880 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
881
882 if (laddr->ifa == NULL) {
883 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
884 continue;
885 }
886 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
887 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
888 continue;
889 }
890 if (laddr->ifa->address.sa.sa_family ==
891 to->sa_family) {
892 /* see if it matches */
893 struct sockaddr_in *intf_addr, *sin;
894
895 intf_addr = &laddr->ifa->address.sin;
896 sin = (struct sockaddr_in *)to;
897 if (from->sa_family == AF_INET) {
898 if (sin->sin_addr.s_addr ==
899 intf_addr->sin_addr.s_addr) {
900 match = 1;
901 break;
902 }
903 }
904#ifdef INET6
905 if (from->sa_family == AF_INET6) {
906 struct sockaddr_in6 *intf_addr6;
907 struct sockaddr_in6 *sin6;
908
909 sin6 = (struct sockaddr_in6 *)
910 to;
911 intf_addr6 = &laddr->ifa->address.sin6;
912
913 if (SCTP6_ARE_ADDR_EQUAL(sin6,
914 intf_addr6)) {
915 match = 1;
916 break;
917 }
918 }
919#endif
920 }
921 }
922 if (match == 0) {
923 /* This endpoint does not have this address */
924 SCTP_INP_RUNLOCK(inp);
925 continue;
926 }
927 }
928 /*
929 * Ok if we hit here the ep has the address, does it hold
930 * the tcb?
931 */
932
933 stcb = LIST_FIRST(&inp->sctp_asoc_list);
934 if (stcb == NULL) {
935 SCTP_INP_RUNLOCK(inp);
936 continue;
937 }
938 SCTP_TCB_LOCK(stcb);
939 if (stcb->rport != rport) {
940 /* remote port does not match. */
941 SCTP_TCB_UNLOCK(stcb);
942 SCTP_INP_RUNLOCK(inp);
943 continue;
944 }
945 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
946 SCTP_TCB_UNLOCK(stcb);
947 SCTP_INP_RUNLOCK(inp);
948 continue;
949 }
950 /* Does this TCB have a matching address? */
951 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
952
953 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
954 /* not the same family, can't be a match */
955 continue;
956 }
957 switch (from->sa_family) {
958 case AF_INET:
959 {
960 struct sockaddr_in *sin, *rsin;
961
962 sin = (struct sockaddr_in *)&net->ro._l_addr;
963 rsin = (struct sockaddr_in *)from;
964 if (sin->sin_addr.s_addr ==
965 rsin->sin_addr.s_addr) {
966 /* found it */
967 if (netp != NULL) {
968 *netp = net;
969 }
970 /*
971 * Update the endpoint
972 * pointer
973 */
974 *inp_p = inp;
975 SCTP_INP_RUNLOCK(inp);
976 return (stcb);
977 }
978 break;
979 }
980#ifdef INET6
981 case AF_INET6:
982 {
983 struct sockaddr_in6 *sin6, *rsin6;
984
985 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
986 rsin6 = (struct sockaddr_in6 *)from;
987 if (SCTP6_ARE_ADDR_EQUAL(sin6,
988 rsin6)) {
989 /* found it */
990 if (netp != NULL) {
991 *netp = net;
992 }
993 /*
994 * Update the endpoint
995 * pointer
996 */
997 *inp_p = inp;
998 SCTP_INP_RUNLOCK(inp);
999 return (stcb);
1000 }
1001 break;
1002 }
1003#endif
1004 default:
1005 /* TSNH */
1006 break;
1007 }
1008 }
1009 SCTP_TCB_UNLOCK(stcb);
1010 SCTP_INP_RUNLOCK(inp);
1011 }
1012 return (NULL);
1013}
1014
1015/*
1016 * rules for use
1017 *
1018 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1019 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1020 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1021 * NULL.
1022 */
1023
1024struct sctp_tcb *
1025sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1026 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1027{
1028 struct sctpasochead *head;
1029 struct sctp_inpcb *inp;
1030 struct sctp_tcb *stcb = NULL;
1031 struct sctp_nets *net;
1032 uint16_t rport;
1033
1034 inp = *inp_p;
1035 if (remote->sa_family == AF_INET) {
1036 rport = (((struct sockaddr_in *)remote)->sin_port);
1037 } else if (remote->sa_family == AF_INET6) {
1038 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1039 } else {
1040 return (NULL);
1041 }
1042 if (locked_tcb) {
1043 /*
1044 * UN-lock so we can do proper locking here this occurs when
1045 * called from load_addresses_from_init.
1046 */
1047 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1048 SCTP_TCB_UNLOCK(locked_tcb);
1049 }
1050 SCTP_INP_INFO_RLOCK();
1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1052 /*-
1053 * Now either this guy is our listener or it's the
1054 * connector. If it is the one that issued the connect, then
1055 * it's only chance is to be the first TCB in the list. If
1056 * it is the acceptor, then do the special_lookup to hash
1057 * and find the real inp.
1058 */
1059 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1060 /* to is peer addr, from is my addr */
1061 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1062 netp, inp->def_vrf_id);
1063 if ((stcb != NULL) && (locked_tcb == NULL)) {
1064 /* we have a locked tcb, lower refcount */
1065 SCTP_INP_DECR_REF(inp);
1066 }
1067 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1068 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1069 SCTP_TCB_LOCK(locked_tcb);
1070 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1071 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1072 }
1073 SCTP_INP_INFO_RUNLOCK();
1074 return (stcb);
1075 } else {
1076 SCTP_INP_WLOCK(inp);
1077 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1078 goto null_return;
1079 }
1080 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1081 if (stcb == NULL) {
1082 goto null_return;
1083 }
1084 SCTP_TCB_LOCK(stcb);
1085
1086 if (stcb->rport != rport) {
1087 /* remote port does not match. */
1088 SCTP_TCB_UNLOCK(stcb);
1089 goto null_return;
1090 }
1091 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1092 SCTP_TCB_UNLOCK(stcb);
1093 goto null_return;
1094 }
1095 /* now look at the list of remote addresses */
1096 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1097#ifdef INVARIANTS
1098 if (net == (TAILQ_NEXT(net, sctp_next))) {
1099 panic("Corrupt net list");
1100 }
1101#endif
1102 if (net->ro._l_addr.sa.sa_family !=
1103 remote->sa_family) {
1104 /* not the same family */
1105 continue;
1106 }
1107 switch (remote->sa_family) {
1108 case AF_INET:
1109 {
1110 struct sockaddr_in *sin,
1111 *rsin;
1112
1113 sin = (struct sockaddr_in *)
1114 &net->ro._l_addr;
1115 rsin = (struct sockaddr_in *)remote;
1116 if (sin->sin_addr.s_addr ==
1117 rsin->sin_addr.s_addr) {
1118 /* found it */
1119 if (netp != NULL) {
1120 *netp = net;
1121 }
1122 if (locked_tcb == NULL) {
1123 SCTP_INP_DECR_REF(inp);
1124 } else if (locked_tcb != stcb) {
1125 SCTP_TCB_LOCK(locked_tcb);
1126 }
1127 if (locked_tcb) {
1128 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1129 }
1130 SCTP_INP_WUNLOCK(inp);
1131 SCTP_INP_INFO_RUNLOCK();
1132 return (stcb);
1133 }
1134 break;
1135 }
1136#ifdef INET6
1137 case AF_INET6:
1138 {
1139 struct sockaddr_in6 *sin6,
1140 *rsin6;
1141
1142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1143 rsin6 = (struct sockaddr_in6 *)remote;
1144 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1145 rsin6)) {
1146 /* found it */
1147 if (netp != NULL) {
1148 *netp = net;
1149 }
1150 if (locked_tcb == NULL) {
1151 SCTP_INP_DECR_REF(inp);
1152 } else if (locked_tcb != stcb) {
1153 SCTP_TCB_LOCK(locked_tcb);
1154 }
1155 if (locked_tcb) {
1156 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1157 }
1158 SCTP_INP_WUNLOCK(inp);
1159 SCTP_INP_INFO_RUNLOCK();
1160 return (stcb);
1161 }
1162 break;
1163 }
1164#endif
1165 default:
1166 /* TSNH */
1167 break;
1168 }
1169 }
1170 SCTP_TCB_UNLOCK(stcb);
1171 }
1172 } else {
1173 SCTP_INP_WLOCK(inp);
1174 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1175 goto null_return;
1176 }
1177 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1178 inp->sctp_hashmark)];
1179 if (head == NULL) {
1180 goto null_return;
1181 }
1182 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1183 if (stcb->rport != rport) {
1184 /* remote port does not match */
1185 continue;
1186 }
1187 SCTP_TCB_LOCK(stcb);
1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189 SCTP_TCB_UNLOCK(stcb);
1190 continue;
1191 }
1192 /* now look at the list of remote addresses */
1193 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1194#ifdef INVARIANTS
1195 if (net == (TAILQ_NEXT(net, sctp_next))) {
1196 panic("Corrupt net list");
1197 }
1198#endif
1199 if (net->ro._l_addr.sa.sa_family !=
1200 remote->sa_family) {
1201 /* not the same family */
1202 continue;
1203 }
1204 switch (remote->sa_family) {
1205 case AF_INET:
1206 {
1207 struct sockaddr_in *sin,
1208 *rsin;
1209
1210 sin = (struct sockaddr_in *)
1211 &net->ro._l_addr;
1212 rsin = (struct sockaddr_in *)remote;
1213 if (sin->sin_addr.s_addr ==
1214 rsin->sin_addr.s_addr) {
1215 /* found it */
1216 if (netp != NULL) {
1217 *netp = net;
1218 }
1219 if (locked_tcb == NULL) {
1220 SCTP_INP_DECR_REF(inp);
1221 } else if (locked_tcb != stcb) {
1222 SCTP_TCB_LOCK(locked_tcb);
1223 }
1224 if (locked_tcb) {
1225 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1226 }
1227 SCTP_INP_WUNLOCK(inp);
1228 SCTP_INP_INFO_RUNLOCK();
1229 return (stcb);
1230 }
1231 break;
1232 }
1233#ifdef INET6
1234 case AF_INET6:
1235 {
1236 struct sockaddr_in6 *sin6,
1237 *rsin6;
1238
1239 sin6 = (struct sockaddr_in6 *)
1240 &net->ro._l_addr;
1241 rsin6 = (struct sockaddr_in6 *)remote;
1242 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1243 rsin6)) {
1244 /* found it */
1245 if (netp != NULL) {
1246 *netp = net;
1247 }
1248 if (locked_tcb == NULL) {
1249 SCTP_INP_DECR_REF(inp);
1250 } else if (locked_tcb != stcb) {
1251 SCTP_TCB_LOCK(locked_tcb);
1252 }
1253 if (locked_tcb) {
1254 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1255 }
1256 SCTP_INP_WUNLOCK(inp);
1257 SCTP_INP_INFO_RUNLOCK();
1258 return (stcb);
1259 }
1260 break;
1261 }
1262#endif
1263 default:
1264 /* TSNH */
1265 break;
1266 }
1267 }
1268 SCTP_TCB_UNLOCK(stcb);
1269 }
1270 }
1271null_return:
1272 /* clean up for returning null */
1273 if (locked_tcb) {
1274 SCTP_TCB_LOCK(locked_tcb);
1275 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1276 }
1277 SCTP_INP_WUNLOCK(inp);
1278 SCTP_INP_INFO_RUNLOCK();
1279 /* not found */
1280 return (NULL);
1281}
1282
1283/*
1284 * Find an association for a specific endpoint using the association id given
1285 * out in the COMM_UP notification
1286 */
1287
1288struct sctp_tcb *
1289sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1290{
1291 /*
1292 * Use my the assoc_id to find a endpoint
1293 */
1294 struct sctpasochead *head;
1295 struct sctp_tcb *stcb;
1296 uint32_t id;
1297
1298 if (inp == NULL) {
1299 SCTP_PRINTF("TSNH ep_associd\n");
1300 return (NULL);
1301 }
1302 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1303 SCTP_PRINTF("TSNH ep_associd0\n");
1304 return (NULL);
1305 }
1306 id = (uint32_t) asoc_id;
1307 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1308 if (head == NULL) {
1309 /* invalid id TSNH */
1310 SCTP_PRINTF("TSNH ep_associd1\n");
1311 return (NULL);
1312 }
1313 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1314 if (stcb->asoc.assoc_id == id) {
1315 if (inp != stcb->sctp_ep) {
1316 /*
1317 * some other guy has the same id active (id
1318 * collision ??).
1319 */
1320 SCTP_PRINTF("TSNH ep_associd2\n");
1321 continue;
1322 }
1323 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1324 continue;
1325 }
1326 if (want_lock) {
1327 SCTP_TCB_LOCK(stcb);
1328 }
1329 return (stcb);
1330 }
1331 }
1332 return (NULL);
1333}
1334
1335
1336struct sctp_tcb *
1337sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1338{
1339 struct sctp_tcb *stcb;
1340
1341 SCTP_INP_RLOCK(inp);
1342 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1343 SCTP_INP_RUNLOCK(inp);
1344 return (stcb);
1345}
1346
1347
1348static struct sctp_inpcb *
1349sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1350 uint16_t lport, uint32_t vrf_id)
1351{
1352 struct sctp_inpcb *inp;
1353 struct sockaddr_in *sin;
1354
1355#ifdef INET6
1356 struct sockaddr_in6 *sin6;
1357
1358#endif
1359 struct sctp_laddr *laddr;
1360
1361#ifdef INET6
1362 struct sockaddr_in6 *intf_addr6;
1363
1364#endif
1365
1366 int fnd;
1367
1368 /*
1369 * Endpoing probe expects that the INP_INFO is locked.
1370 */
1371 sin = NULL;
1372#ifdef INET6
1373 sin6 = NULL;
1374#endif
1375 switch (nam->sa_family) {
1376 case AF_INET:
1377 sin = (struct sockaddr_in *)nam;
1378 break;
1379#ifdef INET6
1380 case AF_INET6:
1381 sin6 = (struct sockaddr_in6 *)nam;
1382 break;
1383#endif
1384 default:
1385 /* unsupported family */
1386 return (NULL);
1387 }
1388
1389 if (head == NULL)
1390 return (NULL);
1391
1392 LIST_FOREACH(inp, head, sctp_hash) {
1393 SCTP_INP_RLOCK(inp);
1394 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1395 SCTP_INP_RUNLOCK(inp);
1396 continue;
1397 }
1398 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1399 (inp->sctp_lport == lport)) {
1400 /* got it */
1401 if ((nam->sa_family == AF_INET) &&
1402 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1403 SCTP_IPV6_V6ONLY(inp)) {
1404 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1405 SCTP_INP_RUNLOCK(inp);
1406 continue;
1407 }
1408 /* A V6 address and the endpoint is NOT bound V6 */
1409 if (nam->sa_family == AF_INET6 &&
1410 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1411 SCTP_INP_RUNLOCK(inp);
1412 continue;
1413 }
1414 /* does a VRF id match? */
1415 fnd = 0;
1416 if (inp->def_vrf_id == vrf_id)
1417 fnd = 1;
1418
1419 SCTP_INP_RUNLOCK(inp);
1420 if (!fnd)
1421 continue;
1422 return (inp);
1423 }
1424 SCTP_INP_RUNLOCK(inp);
1425 }
1426 if ((nam->sa_family == AF_INET) &&
1427 (sin->sin_addr.s_addr == INADDR_ANY)) {
1428 /* Can't hunt for one that has no address specified */
1429 return (NULL);
1430 }
1431#ifdef INET6
1432 if ((nam->sa_family == AF_INET6) &&
1433 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1434 /* Can't hunt for one that has no address specified */
1435 return (NULL);
1436 }
1437#endif
1438 /*
1439 * ok, not bound to all so see if we can find a EP bound to this
1440 * address.
1441 */
1442 LIST_FOREACH(inp, head, sctp_hash) {
1443 SCTP_INP_RLOCK(inp);
1444 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1445 SCTP_INP_RUNLOCK(inp);
1446 continue;
1447 }
1448 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1449 SCTP_INP_RUNLOCK(inp);
1450 continue;
1451 }
1452 /*
1453 * Ok this could be a likely candidate, look at all of its
1454 * addresses
1455 */
1456 if (inp->sctp_lport != lport) {
1457 SCTP_INP_RUNLOCK(inp);
1458 continue;
1459 }
1460 /* does a VRF id match? */
1461 fnd = 0;
1462 if (inp->def_vrf_id == vrf_id)
1463 fnd = 1;
1464
1465 if (!fnd) {
1466 SCTP_INP_RUNLOCK(inp);
1467 continue;
1468 }
1469 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1470 if (laddr->ifa == NULL) {
1471 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1472 __FUNCTION__);
1473 continue;
1474 }
1475 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1476 laddr->ifa);
1477 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1478 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1479 continue;
1480 }
1481 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1482 /* possible, see if it matches */
1483 struct sockaddr_in *intf_addr;
1484
1485 intf_addr = &laddr->ifa->address.sin;
1486 switch (nam->sa_family) {
1487 case AF_INET:
1488 if (sin->sin_addr.s_addr ==
1489 intf_addr->sin_addr.s_addr) {
1490 SCTP_INP_RUNLOCK(inp);
1491 return (inp);
1492 }
1493 break;
1494#ifdef INET6
1495 case AF_INET6:
1496 intf_addr6 = &laddr->ifa->address.sin6;
1497 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1498 intf_addr6)) {
1499 SCTP_INP_RUNLOCK(inp);
1500 return (inp);
1501 }
1502 break;
1503#endif
1504 }
1505 }
1506 }
1507 SCTP_INP_RUNLOCK(inp);
1508 }
1509 return (NULL);
1510}
1511
1512
1513static struct sctp_inpcb *
1514sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1515{
1516 struct sctppcbhead *head;
1517 struct sctp_inpcb *t_inp;
1518 int fnd;
1519
1520 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1521 SCTP_BASE_INFO(hashmark))];
1522 LIST_FOREACH(t_inp, head, sctp_hash) {
1523 if (t_inp->sctp_lport != lport) {
1524 continue;
1525 }
1526 /* is it in the VRF in question */
1527 fnd = 0;
1528 if (t_inp->def_vrf_id == vrf_id)
1529 fnd = 1;
1530 if (!fnd)
1531 continue;
1532
1533 /* This one is in use. */
1534 /* check the v6/v4 binding issue */
1535 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1536 SCTP_IPV6_V6ONLY(t_inp)) {
1537 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1538 /* collision in V6 space */
1539 return (t_inp);
1540 } else {
1541 /* inp is BOUND_V4 no conflict */
1542 continue;
1543 }
1544 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1545 /* t_inp is bound v4 and v6, conflict always */
1546 return (t_inp);
1547 } else {
1548 /* t_inp is bound only V4 */
1549 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1550 SCTP_IPV6_V6ONLY(inp)) {
1551 /* no conflict */
1552 continue;
1553 }
1554 /* else fall through to conflict */
1555 }
1556 return (t_inp);
1557 }
1558 return (NULL);
1559}
1560
1561
1562int
1563sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1564{
1565 /* For 1-2-1 with port reuse */
1566 struct sctppcbhead *head;
1567 struct sctp_inpcb *tinp;
1568
1569 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1570 /* only works with port reuse on */
1571 return (-1);
1572 }
1573 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1574 return (0);
1575 }
1576 SCTP_INP_RUNLOCK(inp);
1577 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1578 SCTP_BASE_INFO(hashmark))];
1579 /* Kick out all non-listeners to the TCP hash */
1580 LIST_FOREACH(tinp, head, sctp_hash) {
1581 if (tinp->sctp_lport != inp->sctp_lport) {
1582 continue;
1583 }
1584 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1585 continue;
1586 }
1587 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1588 continue;
1589 }
1590 if (tinp->sctp_socket->so_qlimit) {
1591 continue;
1592 }
1593 SCTP_INP_WLOCK(tinp);
1594 LIST_REMOVE(tinp, sctp_hash);
1595 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1596 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1597 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1598 SCTP_INP_WUNLOCK(tinp);
1599 }
1600 SCTP_INP_WLOCK(inp);
1601 /* Pull from where he was */
1602 LIST_REMOVE(inp, sctp_hash);
1603 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1604 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1605 LIST_INSERT_HEAD(head, inp, sctp_hash);
1606 SCTP_INP_WUNLOCK(inp);
1607 SCTP_INP_RLOCK(inp);
1608 return (0);
1609}
1610
1611
1612struct sctp_inpcb *
1613sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1614 uint32_t vrf_id)
1615{
1616 /*
1617 * First we check the hash table to see if someone has this port
1618 * bound with just the port.
1619 */
1620 struct sctp_inpcb *inp;
1621 struct sctppcbhead *head;
1622 struct sockaddr_in *sin;
1623 struct sockaddr_in6 *sin6;
1624 int lport;
1625
1626 if (nam->sa_family == AF_INET) {
1627 sin = (struct sockaddr_in *)nam;
1628 lport = ((struct sockaddr_in *)nam)->sin_port;
1629 } else if (nam->sa_family == AF_INET6) {
1630 sin6 = (struct sockaddr_in6 *)nam;
1631 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1632 } else {
1633 /* unsupported family */
1634 return (NULL);
1635 }
1636 /*
1637 * I could cheat here and just cast to one of the types but we will
1638 * do it right. It also provides the check against an Unsupported
1639 * type too.
1640 */
1641 /* Find the head of the ALLADDR chain */
1642 if (have_lock == 0) {
1643 SCTP_INP_INFO_RLOCK();
1644 }
1645 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1646 SCTP_BASE_INFO(hashmark))];
1647 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1648
1649 /*
1650 * If the TCP model exists it could be that the main listening
1651 * endpoint is gone but there exists a connected socket for this guy
1652 * yet. If so we can return the first one that we find. This may NOT
1653 * be the correct one so the caller should be wary on the return
1654 * INP. Currently the onlyc caller that sets this flag is in bindx
1655 * where we are verifying that a user CAN bind the address. He
1656 * either has bound it already, or someone else has, or its open to
1657 * bind, so this is good enough.
1658 */
1659 if (inp == NULL && find_tcp_pool) {
1660 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1661 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1662 }
1663 if (inp) {
1664 SCTP_INP_INCR_REF(inp);
1665 }
1666 if (have_lock == 0) {
1667 SCTP_INP_INFO_RUNLOCK();
1668 }
1669 return (inp);
1670}
1671
1672/*
1673 * Find an association for an endpoint with the pointer to whom you want to
1674 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1675 * need to change the *to to some other struct like a mbuf...
1676 */
1677struct sctp_tcb *
1678sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1679 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1680 uint32_t vrf_id)
1681{
1682 struct sctp_inpcb *inp = NULL;
1683 struct sctp_tcb *retval;
1684
1685 SCTP_INP_INFO_RLOCK();
1686 if (find_tcp_pool) {
1687 if (inp_p != NULL) {
1688 retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1689 vrf_id);
1690 } else {
1691 retval = sctp_tcb_special_locate(&inp, from, to, netp,
1692 vrf_id);
1693 }
1694 if (retval != NULL) {
1695 SCTP_INP_INFO_RUNLOCK();
1696 return (retval);
1697 }
1698 }
1699 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1700 if (inp_p != NULL) {
1701 *inp_p = inp;
1702 }
1703 SCTP_INP_INFO_RUNLOCK();
1704
1705 if (inp == NULL) {
1706 return (NULL);
1707 }
1708 /*
1709 * ok, we have an endpoint, now lets find the assoc for it (if any)
1710 * we now place the source address or from in the to of the find
1711 * endpoint call. Since in reality this chain is used from the
1712 * inbound packet side.
1713 */
1714 if (inp_p != NULL) {
1715 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1716 NULL);
1717 } else {
1718 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1719 NULL);
1720 }
1721 return retval;
1722}
1723
1724
1725/*
1726 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1727 * find all addresses that the sender has specified in any address list. Each
1728 * address will be used to lookup the TCB and see if one exits.
1729 */
1730static struct sctp_tcb *
1731sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1732 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1733 struct sockaddr *dest)
1734{
1735 struct sockaddr_in sin4;
1736 struct sockaddr_in6 sin6;
1737 struct sctp_paramhdr *phdr, parm_buf;
1738 struct sctp_tcb *retval;
1739 uint32_t ptype, plen;
1740
1741 memset(&sin4, 0, sizeof(sin4));
1742 memset(&sin6, 0, sizeof(sin6));
1743 sin4.sin_len = sizeof(sin4);
1744 sin4.sin_family = AF_INET;
1745 sin4.sin_port = sh->src_port;
1746 sin6.sin6_len = sizeof(sin6);
1747 sin6.sin6_family = AF_INET6;
1748 sin6.sin6_port = sh->src_port;
1749
1750 retval = NULL;
1751 offset += sizeof(struct sctp_init_chunk);
1752
1753 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1754 while (phdr != NULL) {
1755 /* now we must see if we want the parameter */
1756 ptype = ntohs(phdr->param_type);
1757 plen = ntohs(phdr->param_length);
1758 if (plen == 0) {
1759 break;
1760 }
1761 if (ptype == SCTP_IPV4_ADDRESS &&
1762 plen == sizeof(struct sctp_ipv4addr_param)) {
1763 /* Get the rest of the address */
1764 struct sctp_ipv4addr_param ip4_parm, *p4;
1765
1766 phdr = sctp_get_next_param(m, offset,
1767 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1768 if (phdr == NULL) {
1769 return (NULL);
1770 }
1771 p4 = (struct sctp_ipv4addr_param *)phdr;
1772 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1773 /* look it up */
1774 retval = sctp_findassociation_ep_addr(inp_p,
1775 (struct sockaddr *)&sin4, netp, dest, NULL);
1776 if (retval != NULL) {
1777 return (retval);
1778 }
1779 } else if (ptype == SCTP_IPV6_ADDRESS &&
1780 plen == sizeof(struct sctp_ipv6addr_param)) {
1781 /* Get the rest of the address */
1782 struct sctp_ipv6addr_param ip6_parm, *p6;
1783
1784 phdr = sctp_get_next_param(m, offset,
1785 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1786 if (phdr == NULL) {
1787 return (NULL);
1788 }
1789 p6 = (struct sctp_ipv6addr_param *)phdr;
1790 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1791 /* look it up */
1792 retval = sctp_findassociation_ep_addr(inp_p,
1793 (struct sockaddr *)&sin6, netp, dest, NULL);
1794 if (retval != NULL) {
1795 return (retval);
1796 }
1797 }
1798 offset += SCTP_SIZE32(plen);
1799 phdr = sctp_get_next_param(m, offset, &parm_buf,
1800 sizeof(parm_buf));
1801 }
1802 return (NULL);
1803}
1804
1805static int
1806sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1807{
1808 struct sctp_nets *net;
1809
1810 /*
1811 * Simple question, the ports match, does the tcb own the to
1812 * address?
1813 */
1814 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1815 /* of course */
1816 return (1);
1817 }
1818 /* have to look at all bound addresses */
1819 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1820 if (net->ro._l_addr.sa.sa_family != to->sa_family) {
1821 /* not the same family, can't be a match */
1822 continue;
1823 }
1824 switch (to->sa_family) {
1825 case AF_INET:
1826 {
1827 struct sockaddr_in *sin, *rsin;
1828
1829 sin = (struct sockaddr_in *)&net->ro._l_addr;
1830 rsin = (struct sockaddr_in *)to;
1831 if (sin->sin_addr.s_addr ==
1832 rsin->sin_addr.s_addr) {
1833 /* found it */
1834 return (1);
1835 }
1836 break;
1837 }
1838#ifdef INET6
1839 case AF_INET6:
1840 {
1841 struct sockaddr_in6 *sin6, *rsin6;
1842
1843 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1844 rsin6 = (struct sockaddr_in6 *)to;
1845 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1846 rsin6)) {
1847 /* Update the endpoint pointer */
1848 return (1);
1849 }
1850 break;
1851 }
1852#endif
1853 default:
1854 /* TSNH */
1855 break;
1856 }
1857 }
1858 /* Nope, do not have the address ;-( */
1859 return (0);
1860}
1861
1862static struct sctp_tcb *
1863sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1864 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1865 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1866{
1867 /*
1868 * Use my vtag to hash. If we find it we then verify the source addr
1869 * is in the assoc. If all goes well we save a bit on rec of a
1870 * packet.
1871 */
1872 struct sctpasochead *head;
1873 struct sctp_nets *net;
1874 struct sctp_tcb *stcb;
1875
1876 *netp = NULL;
1877 *inp_p = NULL;
1878 SCTP_INP_INFO_RLOCK();
1879 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1880 SCTP_BASE_INFO(hashasocmark))];
1881 if (head == NULL) {
1882 /* invalid vtag */
1883 SCTP_INP_INFO_RUNLOCK();
1884 return (NULL);
1885 }
1886 LIST_FOREACH(stcb, head, sctp_asocs) {
1887 SCTP_INP_RLOCK(stcb->sctp_ep);
1888 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1890 continue;
1891 }
1892 SCTP_TCB_LOCK(stcb);
1893 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1894 if (stcb->asoc.my_vtag == vtag) {
1895 /* candidate */
1896 if (stcb->rport != rport) {
1897 SCTP_TCB_UNLOCK(stcb);
1898 continue;
1899 }
1900 if (stcb->sctp_ep->sctp_lport != lport) {
1901 SCTP_TCB_UNLOCK(stcb);
1902 continue;
1903 }
1904 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1905 SCTP_TCB_UNLOCK(stcb);
1906 continue;
1907 }
1908 /* RRS:Need toaddr check here */
1909 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
1910 /* Endpoint does not own this address */
1911 SCTP_TCB_UNLOCK(stcb);
1912 continue;
1913 }
1914 if (remote_tag) {
1915 /*
1916 * If we have both vtags thats all we match
1917 * on
1918 */
1919 if (stcb->asoc.peer_vtag == remote_tag) {
1920 /*
1921 * If both tags match we consider it
1922 * conclusive and check NO
1923 * source/destination addresses
1924 */
1925 goto conclusive;
1926 }
1927 }
1928 if (skip_src_check) {
1929 conclusive:
1930 if (from) {
1931 net = sctp_findnet(stcb, from);
1932 } else {
1933 *netp = NULL; /* unknown */
1934 }
1935 if (inp_p)
1936 *inp_p = stcb->sctp_ep;
1937 SCTP_INP_INFO_RUNLOCK();
1938 return (stcb);
1939 }
1940 net = sctp_findnet(stcb, from);
1941 if (net) {
1942 /* yep its him. */
1943 *netp = net;
1944 SCTP_STAT_INCR(sctps_vtagexpress);
1945 *inp_p = stcb->sctp_ep;
1946 SCTP_INP_INFO_RUNLOCK();
1947 return (stcb);
1948 } else {
1949 /*
1950 * not him, this should only happen in rare
1951 * cases so I peg it.
1952 */
1953 SCTP_STAT_INCR(sctps_vtagbogus);
1954 }
1955 }
1956 SCTP_TCB_UNLOCK(stcb);
1957 }
1958 SCTP_INP_INFO_RUNLOCK();
1959 return (NULL);
1960}
1961
1962/*
1963 * Find an association with the pointer to the inbound IP packet. This can be
1964 * a IPv4 or IPv6 packet.
1965 */
1966struct sctp_tcb *
1967sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1968 struct sctphdr *sh, struct sctp_chunkhdr *ch,
1969 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1970{
1971 int find_tcp_pool;
1972 struct ip *iph;
1973 struct sctp_tcb *retval;
1974 struct sockaddr_storage to_store, from_store;
1975 struct sockaddr *to = (struct sockaddr *)&to_store;
1976 struct sockaddr *from = (struct sockaddr *)&from_store;
1977 struct sctp_inpcb *inp;
1978
1979 iph = mtod(m, struct ip *);
1980 switch (iph->ip_v) {
1981 case IPVERSION:
1982 {
1983 /* its IPv4 */
1984 struct sockaddr_in *from4;
1985
1986 from4 = (struct sockaddr_in *)&from_store;
1987 bzero(from4, sizeof(*from4));
1988 from4->sin_family = AF_INET;
1989 from4->sin_len = sizeof(struct sockaddr_in);
1990 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1991 from4->sin_port = sh->src_port;
1992 break;
1993 }
1994#ifdef INET6
1995 case IPV6_VERSION >> 4:
1996 {
1997 /* its IPv6 */
1998 struct ip6_hdr *ip6;
1999 struct sockaddr_in6 *from6;
2000
2001 ip6 = mtod(m, struct ip6_hdr *);
2002 from6 = (struct sockaddr_in6 *)&from_store;
2003 bzero(from6, sizeof(*from6));
2004 from6->sin6_family = AF_INET6;
2005 from6->sin6_len = sizeof(struct sockaddr_in6);
2006 from6->sin6_addr = ip6->ip6_src;
2007 from6->sin6_port = sh->src_port;
2008 /* Get the scopes in properly to the sin6 addr's */
2009 /* we probably don't need these operations */
2010 (void)sa6_recoverscope(from6);
|
2011 sa6_embedscope(from6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
| 2011 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
|
2012 break;
2013 }
2014#endif
2015 default:
2016 /* Currently not supported. */
2017 return (NULL);
2018 }
2019
2020
2021 switch (iph->ip_v) {
2022 case IPVERSION:
2023 {
2024 /* its IPv4 */
2025 struct sockaddr_in *to4;
2026
2027 to4 = (struct sockaddr_in *)&to_store;
2028 bzero(to4, sizeof(*to4));
2029 to4->sin_family = AF_INET;
2030 to4->sin_len = sizeof(struct sockaddr_in);
2031 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2032 to4->sin_port = sh->dest_port;
2033 break;
2034 }
2035#ifdef INET6
2036 case IPV6_VERSION >> 4:
2037 {
2038 /* its IPv6 */
2039 struct ip6_hdr *ip6;
2040 struct sockaddr_in6 *to6;
2041
2042 ip6 = mtod(m, struct ip6_hdr *);
2043 to6 = (struct sockaddr_in6 *)&to_store;
2044 bzero(to6, sizeof(*to6));
2045 to6->sin6_family = AF_INET6;
2046 to6->sin6_len = sizeof(struct sockaddr_in6);
2047 to6->sin6_addr = ip6->ip6_dst;
2048 to6->sin6_port = sh->dest_port;
2049 /* Get the scopes in properly to the sin6 addr's */
2050 /* we probably don't need these operations */
2051 (void)sa6_recoverscope(to6);
| 2012 break;
2013 }
2014#endif
2015 default:
2016 /* Currently not supported. */
2017 return (NULL);
2018 }
2019
2020
2021 switch (iph->ip_v) {
2022 case IPVERSION:
2023 {
2024 /* its IPv4 */
2025 struct sockaddr_in *to4;
2026
2027 to4 = (struct sockaddr_in *)&to_store;
2028 bzero(to4, sizeof(*to4));
2029 to4->sin_family = AF_INET;
2030 to4->sin_len = sizeof(struct sockaddr_in);
2031 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2032 to4->sin_port = sh->dest_port;
2033 break;
2034 }
2035#ifdef INET6
2036 case IPV6_VERSION >> 4:
2037 {
2038 /* its IPv6 */
2039 struct ip6_hdr *ip6;
2040 struct sockaddr_in6 *to6;
2041
2042 ip6 = mtod(m, struct ip6_hdr *);
2043 to6 = (struct sockaddr_in6 *)&to_store;
2044 bzero(to6, sizeof(*to6));
2045 to6->sin6_family = AF_INET6;
2046 to6->sin6_len = sizeof(struct sockaddr_in6);
2047 to6->sin6_addr = ip6->ip6_dst;
2048 to6->sin6_port = sh->dest_port;
2049 /* Get the scopes in properly to the sin6 addr's */
2050 /* we probably don't need these operations */
2051 (void)sa6_recoverscope(to6);
|
2052 sa6_embedscope(to6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
| 2052 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
|
2053 break;
2054 }
2055#endif
2056 default:
2057 /* TSNH */
2058 break;
2059 }
2060 if (sh->v_tag) {
2061 /* we only go down this path if vtag is non-zero */
2062 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2063 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2064 if (retval) {
2065 return (retval);
2066 }
2067 }
2068 find_tcp_pool = 0;
2069 if ((ch->chunk_type != SCTP_INITIATION) &&
2070 (ch->chunk_type != SCTP_INITIATION_ACK) &&
2071 (ch->chunk_type != SCTP_COOKIE_ACK) &&
2072 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2073 /* Other chunk types go to the tcp pool. */
2074 find_tcp_pool = 1;
2075 }
2076 if (inp_p) {
2077 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2078 find_tcp_pool, vrf_id);
2079 inp = *inp_p;
2080 } else {
2081 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2082 find_tcp_pool, vrf_id);
2083 }
2084 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2085 if (retval == NULL && inp) {
2086 /* Found a EP but not this address */
2087 if ((ch->chunk_type == SCTP_INITIATION) ||
2088 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2089 /*-
2090 * special hook, we do NOT return linp or an
2091 * association that is linked to an existing
2092 * association that is under the TCP pool (i.e. no
2093 * listener exists). The endpoint finding routine
2094 * will always find a listner before examining the
2095 * TCP pool.
2096 */
2097 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2098 if (inp_p) {
2099 *inp_p = NULL;
2100 }
2101 return (NULL);
2102 }
2103 retval = sctp_findassociation_special_addr(m, iphlen,
2104 offset, sh, &inp, netp, to);
2105 if (inp_p != NULL) {
2106 *inp_p = inp;
2107 }
2108 }
2109 }
2110 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2111 return (retval);
2112}
2113
2114/*
2115 * lookup an association by an ASCONF lookup address.
2116 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2117 */
2118struct sctp_tcb *
2119sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2120 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2121{
2122 struct sctp_tcb *stcb;
2123 struct sockaddr_in *sin;
2124
2125#ifdef INET6
2126 struct sockaddr_in6 *sin6;
2127
2128#endif
2129 struct sockaddr_storage local_store, remote_store;
2130 struct sockaddr *to;
2131 struct ip *iph;
2132
2133#ifdef INET6
2134 struct ip6_hdr *ip6;
2135
2136#endif
2137 struct sctp_paramhdr parm_buf, *phdr;
2138 int ptype;
2139 int zero_address = 0;
2140
2141
2142 memset(&local_store, 0, sizeof(local_store));
2143 memset(&remote_store, 0, sizeof(remote_store));
2144 to = (struct sockaddr *)&local_store;
2145 /* First get the destination address setup too. */
2146 iph = mtod(m, struct ip *);
2147 switch (iph->ip_v) {
2148 case IPVERSION:
2149 /* its IPv4 */
2150 sin = (struct sockaddr_in *)&local_store;
2151 sin->sin_family = AF_INET;
2152 sin->sin_len = sizeof(*sin);
2153 sin->sin_port = sh->dest_port;
2154 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2155 break;
2156#ifdef INET6
2157 case IPV6_VERSION >> 4:
2158 /* its IPv6 */
2159 ip6 = mtod(m, struct ip6_hdr *);
2160 sin6 = (struct sockaddr_in6 *)&local_store;
2161 sin6->sin6_family = AF_INET6;
2162 sin6->sin6_len = sizeof(*sin6);
2163 sin6->sin6_port = sh->dest_port;
2164 sin6->sin6_addr = ip6->ip6_dst;
2165 break;
2166#endif
2167 default:
2168 return NULL;
2169 }
2170
2171 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2172 &parm_buf, sizeof(struct sctp_paramhdr));
2173 if (phdr == NULL) {
2174 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2175 __FUNCTION__);
2176 return NULL;
2177 }
2178 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2179 /* get the correlation address */
2180 switch (ptype) {
2181#ifdef INET6
2182 case SCTP_IPV6_ADDRESS:
2183 {
2184 /* ipv6 address param */
2185 struct sctp_ipv6addr_param *p6, p6_buf;
2186
2187 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2188 return NULL;
2189 }
2190 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2191 offset + sizeof(struct sctp_asconf_chunk),
2192 &p6_buf.ph, sizeof(*p6));
2193 if (p6 == NULL) {
2194 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2195 __FUNCTION__);
2196 return (NULL);
2197 }
2198 sin6 = (struct sockaddr_in6 *)&remote_store;
2199 sin6->sin6_family = AF_INET6;
2200 sin6->sin6_len = sizeof(*sin6);
2201 sin6->sin6_port = sh->src_port;
2202 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2203 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2204 zero_address = 1;
2205 break;
2206 }
2207#endif
2208 case SCTP_IPV4_ADDRESS:
2209 {
2210 /* ipv4 address param */
2211 struct sctp_ipv4addr_param *p4, p4_buf;
2212
2213 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2214 return NULL;
2215 }
2216 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2217 offset + sizeof(struct sctp_asconf_chunk),
2218 &p4_buf.ph, sizeof(*p4));
2219 if (p4 == NULL) {
2220 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2221 __FUNCTION__);
2222 return (NULL);
2223 }
2224 sin = (struct sockaddr_in *)&remote_store;
2225 sin->sin_family = AF_INET;
2226 sin->sin_len = sizeof(*sin);
2227 sin->sin_port = sh->src_port;
2228 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2229 if (sin->sin_addr.s_addr == INADDR_ANY)
2230 zero_address = 1;
2231 break;
2232 }
2233 default:
2234 /* invalid address param type */
2235 return NULL;
2236 }
2237
2238 if (zero_address) {
2239 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2240 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2241 /*
2242 * printf("findassociation_ep_asconf: zero lookup address
2243 * finds stcb 0x%x\n", (uint32_t)stcb);
2244 */
2245 } else {
2246 stcb = sctp_findassociation_ep_addr(inp_p,
2247 (struct sockaddr *)&remote_store, netp,
2248 to, NULL);
2249 }
2250 return (stcb);
2251}
2252
2253
2254/*
2255 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2256 * addresses. This way if we don't get a bind we by default pick a ephemeral
2257 * port with all addresses bound.
2258 */
2259int
2260sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2261{
2262 /*
2263 * we get called when a new endpoint starts up. We need to allocate
2264 * the sctp_inpcb structure from the zone and init it. Mark it as
2265 * unbound and find a port that we can use as an ephemeral with
2266 * INADDR_ANY. If the user binds later no problem we can then add in
2267 * the specific addresses. And setup the default parameters for the
2268 * EP.
2269 */
2270 int i, error;
2271 struct sctp_inpcb *inp;
2272 struct sctp_pcb *m;
2273 struct timeval time;
2274 sctp_sharedkey_t *null_key;
2275
2276 error = 0;
2277
2278 SCTP_INP_INFO_WLOCK();
2279 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2280 if (inp == NULL) {
2281 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2282 SCTP_INP_INFO_WUNLOCK();
2283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2284 return (ENOBUFS);
2285 }
2286 /* zap it */
2287 bzero(inp, sizeof(*inp));
2288
2289 /* bump generations */
2290 /* setup socket pointers */
2291 inp->sctp_socket = so;
2292 inp->ip_inp.inp.inp_socket = so;
2293 inp->sctp_associd_counter = 1;
2294 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2295 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2296 /* init the small hash table we use to track asocid <-> tcb */
2297 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2298 if (inp->sctp_asocidhash == NULL) {
2299 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2300 SCTP_INP_INFO_WUNLOCK();
2301 return error;
2302 }
2303#ifdef IPSEC
2304 {
2305 struct inpcbpolicy *pcb_sp = NULL;
2306
2307 error = ipsec_init_policy(so, &pcb_sp);
2308 /* Arrange to share the policy */
2309 inp->ip_inp.inp.inp_sp = pcb_sp;
2310 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2311 }
2312 if (error != 0) {
2313 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2314 SCTP_INP_INFO_WUNLOCK();
2315 return error;
2316 }
2317#endif /* IPSEC */
2318 SCTP_INCR_EP_COUNT();
| 2053 break;
2054 }
2055#endif
2056 default:
2057 /* TSNH */
2058 break;
2059 }
2060 if (sh->v_tag) {
2061 /* we only go down this path if vtag is non-zero */
2062 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2063 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2064 if (retval) {
2065 return (retval);
2066 }
2067 }
2068 find_tcp_pool = 0;
2069 if ((ch->chunk_type != SCTP_INITIATION) &&
2070 (ch->chunk_type != SCTP_INITIATION_ACK) &&
2071 (ch->chunk_type != SCTP_COOKIE_ACK) &&
2072 (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2073 /* Other chunk types go to the tcp pool. */
2074 find_tcp_pool = 1;
2075 }
2076 if (inp_p) {
2077 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2078 find_tcp_pool, vrf_id);
2079 inp = *inp_p;
2080 } else {
2081 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2082 find_tcp_pool, vrf_id);
2083 }
2084 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2085 if (retval == NULL && inp) {
2086 /* Found a EP but not this address */
2087 if ((ch->chunk_type == SCTP_INITIATION) ||
2088 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2089 /*-
2090 * special hook, we do NOT return linp or an
2091 * association that is linked to an existing
2092 * association that is under the TCP pool (i.e. no
2093 * listener exists). The endpoint finding routine
2094 * will always find a listner before examining the
2095 * TCP pool.
2096 */
2097 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2098 if (inp_p) {
2099 *inp_p = NULL;
2100 }
2101 return (NULL);
2102 }
2103 retval = sctp_findassociation_special_addr(m, iphlen,
2104 offset, sh, &inp, netp, to);
2105 if (inp_p != NULL) {
2106 *inp_p = inp;
2107 }
2108 }
2109 }
2110 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2111 return (retval);
2112}
2113
2114/*
2115 * lookup an association by an ASCONF lookup address.
2116 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2117 */
2118struct sctp_tcb *
2119sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2120 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2121{
2122 struct sctp_tcb *stcb;
2123 struct sockaddr_in *sin;
2124
2125#ifdef INET6
2126 struct sockaddr_in6 *sin6;
2127
2128#endif
2129 struct sockaddr_storage local_store, remote_store;
2130 struct sockaddr *to;
2131 struct ip *iph;
2132
2133#ifdef INET6
2134 struct ip6_hdr *ip6;
2135
2136#endif
2137 struct sctp_paramhdr parm_buf, *phdr;
2138 int ptype;
2139 int zero_address = 0;
2140
2141
2142 memset(&local_store, 0, sizeof(local_store));
2143 memset(&remote_store, 0, sizeof(remote_store));
2144 to = (struct sockaddr *)&local_store;
2145 /* First get the destination address setup too. */
2146 iph = mtod(m, struct ip *);
2147 switch (iph->ip_v) {
2148 case IPVERSION:
2149 /* its IPv4 */
2150 sin = (struct sockaddr_in *)&local_store;
2151 sin->sin_family = AF_INET;
2152 sin->sin_len = sizeof(*sin);
2153 sin->sin_port = sh->dest_port;
2154 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2155 break;
2156#ifdef INET6
2157 case IPV6_VERSION >> 4:
2158 /* its IPv6 */
2159 ip6 = mtod(m, struct ip6_hdr *);
2160 sin6 = (struct sockaddr_in6 *)&local_store;
2161 sin6->sin6_family = AF_INET6;
2162 sin6->sin6_len = sizeof(*sin6);
2163 sin6->sin6_port = sh->dest_port;
2164 sin6->sin6_addr = ip6->ip6_dst;
2165 break;
2166#endif
2167 default:
2168 return NULL;
2169 }
2170
2171 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2172 &parm_buf, sizeof(struct sctp_paramhdr));
2173 if (phdr == NULL) {
2174 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2175 __FUNCTION__);
2176 return NULL;
2177 }
2178 ptype = (int)((uint32_t) ntohs(phdr->param_type));
2179 /* get the correlation address */
2180 switch (ptype) {
2181#ifdef INET6
2182 case SCTP_IPV6_ADDRESS:
2183 {
2184 /* ipv6 address param */
2185 struct sctp_ipv6addr_param *p6, p6_buf;
2186
2187 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2188 return NULL;
2189 }
2190 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2191 offset + sizeof(struct sctp_asconf_chunk),
2192 &p6_buf.ph, sizeof(*p6));
2193 if (p6 == NULL) {
2194 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2195 __FUNCTION__);
2196 return (NULL);
2197 }
2198 sin6 = (struct sockaddr_in6 *)&remote_store;
2199 sin6->sin6_family = AF_INET6;
2200 sin6->sin6_len = sizeof(*sin6);
2201 sin6->sin6_port = sh->src_port;
2202 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2203 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2204 zero_address = 1;
2205 break;
2206 }
2207#endif
2208 case SCTP_IPV4_ADDRESS:
2209 {
2210 /* ipv4 address param */
2211 struct sctp_ipv4addr_param *p4, p4_buf;
2212
2213 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2214 return NULL;
2215 }
2216 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2217 offset + sizeof(struct sctp_asconf_chunk),
2218 &p4_buf.ph, sizeof(*p4));
2219 if (p4 == NULL) {
2220 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2221 __FUNCTION__);
2222 return (NULL);
2223 }
2224 sin = (struct sockaddr_in *)&remote_store;
2225 sin->sin_family = AF_INET;
2226 sin->sin_len = sizeof(*sin);
2227 sin->sin_port = sh->src_port;
2228 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2229 if (sin->sin_addr.s_addr == INADDR_ANY)
2230 zero_address = 1;
2231 break;
2232 }
2233 default:
2234 /* invalid address param type */
2235 return NULL;
2236 }
2237
2238 if (zero_address) {
2239 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2240 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2241 /*
2242 * printf("findassociation_ep_asconf: zero lookup address
2243 * finds stcb 0x%x\n", (uint32_t)stcb);
2244 */
2245 } else {
2246 stcb = sctp_findassociation_ep_addr(inp_p,
2247 (struct sockaddr *)&remote_store, netp,
2248 to, NULL);
2249 }
2250 return (stcb);
2251}
2252
2253
2254/*
2255 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2256 * addresses. This way if we don't get a bind we by default pick a ephemeral
2257 * port with all addresses bound.
2258 */
2259int
2260sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2261{
2262 /*
2263 * we get called when a new endpoint starts up. We need to allocate
2264 * the sctp_inpcb structure from the zone and init it. Mark it as
2265 * unbound and find a port that we can use as an ephemeral with
2266 * INADDR_ANY. If the user binds later no problem we can then add in
2267 * the specific addresses. And setup the default parameters for the
2268 * EP.
2269 */
2270 int i, error;
2271 struct sctp_inpcb *inp;
2272 struct sctp_pcb *m;
2273 struct timeval time;
2274 sctp_sharedkey_t *null_key;
2275
2276 error = 0;
2277
2278 SCTP_INP_INFO_WLOCK();
2279 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2280 if (inp == NULL) {
2281 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2282 SCTP_INP_INFO_WUNLOCK();
2283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2284 return (ENOBUFS);
2285 }
2286 /* zap it */
2287 bzero(inp, sizeof(*inp));
2288
2289 /* bump generations */
2290 /* setup socket pointers */
2291 inp->sctp_socket = so;
2292 inp->ip_inp.inp.inp_socket = so;
2293 inp->sctp_associd_counter = 1;
2294 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2295 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2296 /* init the small hash table we use to track asocid <-> tcb */
2297 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2298 if (inp->sctp_asocidhash == NULL) {
2299 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2300 SCTP_INP_INFO_WUNLOCK();
2301 return error;
2302 }
2303#ifdef IPSEC
2304 {
2305 struct inpcbpolicy *pcb_sp = NULL;
2306
2307 error = ipsec_init_policy(so, &pcb_sp);
2308 /* Arrange to share the policy */
2309 inp->ip_inp.inp.inp_sp = pcb_sp;
2310 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2311 }
2312 if (error != 0) {
2313 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2314 SCTP_INP_INFO_WUNLOCK();
2315 return error;
2316 }
2317#endif /* IPSEC */
2318 SCTP_INCR_EP_COUNT();
|
2319 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(MOD_INET, ip_defttl);
| 2319 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
|
2320 SCTP_INP_INFO_WUNLOCK();
2321
2322 so->so_pcb = (caddr_t)inp;
2323
2324 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2325 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2326 /* UDP style socket */
2327 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2328 SCTP_PCB_FLAGS_UNBOUND);
2329 /* Be sure it is NON-BLOCKING IO for UDP */
2330 /* SCTP_SET_SO_NBIO(so); */
2331 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2332 /* TCP style socket */
2333 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2334 SCTP_PCB_FLAGS_UNBOUND);
2335 /* Be sure we have blocking IO by default */
2336 SCTP_CLEAR_SO_NBIO(so);
2337 } else {
2338 /*
2339 * unsupported socket type (RAW, etc)- in case we missed it
2340 * in protosw
2341 */
2342 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2343 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2344 return (EOPNOTSUPP);
2345 }
2346 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2347 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2348 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2349 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2350 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2351 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2352 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2353 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2354 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2355 }
2356 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2357 &inp->sctp_hashmark);
2358 if (inp->sctp_tcbhash == NULL) {
2359 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2360 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2361 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2362 return (ENOBUFS);
2363 }
2364 inp->def_vrf_id = vrf_id;
2365
2366 SCTP_INP_INFO_WLOCK();
2367 SCTP_INP_LOCK_INIT(inp);
2368 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2369 SCTP_INP_READ_INIT(inp);
2370 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2371 /* lock the new ep */
2372 SCTP_INP_WLOCK(inp);
2373
2374 /* add it to the info area */
2375 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2376 SCTP_INP_INFO_WUNLOCK();
2377
2378 TAILQ_INIT(&inp->read_queue);
2379 LIST_INIT(&inp->sctp_addr_list);
2380
2381 LIST_INIT(&inp->sctp_asoc_list);
2382
2383#ifdef SCTP_TRACK_FREED_ASOCS
2384 /* TEMP CODE */
2385 LIST_INIT(&inp->sctp_asoc_free_list);
2386#endif
2387 /* Init the timer structure for signature change */
2388 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2389 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2390
2391 /* now init the actual endpoint default data */
2392 m = &inp->sctp_ep;
2393
2394 /* setup the base timeout information */
2395 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
2396 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
2397 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2398 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2399 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2400 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2401 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2402 /* all max/min max are in ms */
2403 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2404 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2405 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2406 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2407 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2408
2409 m->max_open_streams_intome = MAX_SCTP_STREAMS;
2410
2411 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2412 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2413 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2414 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2415 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2416 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2417 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2418 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2419 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2420 } else {
2421 /* sysctl done with invalid value, set to 2581 */
2422 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2423 }
2424 /* number of streams to pre-open on a association */
2425 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2426
2427 /* Add adaptation cookie */
2428 m->adaptation_layer_indicator = 0x504C5253;
2429
2430 /* seed random number generator */
2431 m->random_counter = 1;
2432 m->store_at = SCTP_SIGNATURE_SIZE;
2433 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2434 sctp_fill_random_store(m);
2435
2436 /* Minimum cookie size */
2437 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2438 sizeof(struct sctp_state_cookie);
2439 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2440
2441 /* Setup the initial secret */
2442 (void)SCTP_GETTIME_TIMEVAL(&time);
2443 m->time_of_secret_change = time.tv_sec;
2444
2445 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2446 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2447 }
2448 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2449
2450 /* How long is a cookie good for ? */
2451 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2452 /*
2453 * Initialize authentication parameters
2454 */
2455 m->local_hmacs = sctp_default_supported_hmaclist();
2456 m->local_auth_chunks = sctp_alloc_chunklist();
2457 sctp_auth_set_default_chunks(m->local_auth_chunks);
2458 LIST_INIT(&m->shared_keys);
2459 /* add default NULL key as key id 0 */
2460 null_key = sctp_alloc_sharedkey();
2461 sctp_insert_sharedkey(&m->shared_keys, null_key);
2462 SCTP_INP_WUNLOCK(inp);
2463#ifdef SCTP_LOG_CLOSING
2464 sctp_log_closing(inp, NULL, 12);
2465#endif
2466 return (error);
2467}
2468
2469
2470void
2471sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2472 struct sctp_tcb *stcb)
2473{
2474 struct sctp_nets *net;
2475 uint16_t lport, rport;
2476 struct sctppcbhead *head;
2477 struct sctp_laddr *laddr, *oladdr;
2478
2479 atomic_add_int(&stcb->asoc.refcnt, 1);
2480 SCTP_TCB_UNLOCK(stcb);
2481 SCTP_INP_INFO_WLOCK();
2482 SCTP_INP_WLOCK(old_inp);
2483 SCTP_INP_WLOCK(new_inp);
2484 SCTP_TCB_LOCK(stcb);
2485 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2486
2487 new_inp->sctp_ep.time_of_secret_change =
2488 old_inp->sctp_ep.time_of_secret_change;
2489 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2490 sizeof(old_inp->sctp_ep.secret_key));
2491 new_inp->sctp_ep.current_secret_number =
2492 old_inp->sctp_ep.current_secret_number;
2493 new_inp->sctp_ep.last_secret_number =
2494 old_inp->sctp_ep.last_secret_number;
2495 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2496
2497 /* make it so new data pours into the new socket */
2498 stcb->sctp_socket = new_inp->sctp_socket;
2499 stcb->sctp_ep = new_inp;
2500
2501 /* Copy the port across */
2502 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2503 rport = stcb->rport;
2504 /* Pull the tcb from the old association */
2505 LIST_REMOVE(stcb, sctp_tcbhash);
2506 LIST_REMOVE(stcb, sctp_tcblist);
2507 if (stcb->asoc.in_asocid_hash) {
2508 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2509 }
2510 /* Now insert the new_inp into the TCP connected hash */
2511 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2512 SCTP_BASE_INFO(hashtcpmark))];
2513
2514 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2515 /* Its safe to access */
2516 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2517
2518 /* Now move the tcb into the endpoint list */
2519 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2520 /*
2521 * Question, do we even need to worry about the ep-hash since we
2522 * only have one connection? Probably not :> so lets get rid of it
2523 * and not suck up any kernel memory in that.
2524 */
2525 if (stcb->asoc.in_asocid_hash) {
2526 struct sctpasochead *lhd;
2527
2528 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2529 new_inp->hashasocidmark)];
2530 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2531 }
2532 /* Ok. Let's restart timer. */
2533 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2534 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2535 stcb, net);
2536 }
2537
2538 SCTP_INP_INFO_WUNLOCK();
2539 if (new_inp->sctp_tcbhash != NULL) {
2540 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2541 new_inp->sctp_tcbhash = NULL;
2542 }
2543 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2544 /* Subset bound, so copy in the laddr list from the old_inp */
2545 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2546 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2547 if (laddr == NULL) {
2548 /*
2549 * Gak, what can we do? This assoc is really
2550 * HOSED. We probably should send an abort
2551 * here.
2552 */
2553 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2554 continue;
2555 }
2556 SCTP_INCR_LADDR_COUNT();
2557 bzero(laddr, sizeof(*laddr));
2558 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2559 laddr->ifa = oladdr->ifa;
2560 atomic_add_int(&laddr->ifa->refcount, 1);
2561 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2562 sctp_nxt_addr);
2563 new_inp->laddr_count++;
2564 }
2565 }
2566 /*
2567 * Now any running timers need to be adjusted since we really don't
2568 * care if they are running or not just blast in the new_inp into
2569 * all of them.
2570 */
2571
2572 stcb->asoc.hb_timer.ep = (void *)new_inp;
2573 stcb->asoc.dack_timer.ep = (void *)new_inp;
2574 stcb->asoc.asconf_timer.ep = (void *)new_inp;
2575 stcb->asoc.strreset_timer.ep = (void *)new_inp;
2576 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2577 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2578 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2579 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2580 /* now what about the nets? */
2581 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2582 net->pmtu_timer.ep = (void *)new_inp;
2583 net->rxt_timer.ep = (void *)new_inp;
2584 net->fr_timer.ep = (void *)new_inp;
2585 }
2586 SCTP_INP_WUNLOCK(new_inp);
2587 SCTP_INP_WUNLOCK(old_inp);
2588}
2589
2590
2591
2592
2593/* sctp_ifap is used to bypass normal local address validation checks */
2594int
2595sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2596 struct sctp_ifa *sctp_ifap, struct thread *p)
2597{
2598 /* bind a ep to a socket address */
2599 struct sctppcbhead *head;
2600 struct sctp_inpcb *inp, *inp_tmp;
2601 struct inpcb *ip_inp;
2602 int port_reuse_active = 0;
2603 int bindall;
2604 uint16_t lport;
2605 int error;
2606 uint32_t vrf_id;
2607
2608 lport = 0;
2609 error = 0;
2610 bindall = 1;
2611 inp = (struct sctp_inpcb *)so->so_pcb;
2612 ip_inp = (struct inpcb *)so->so_pcb;
2613#ifdef SCTP_DEBUG
2614 if (addr) {
2615 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2616 ntohs(((struct sockaddr_in *)addr)->sin_port));
2617 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2618 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2619 }
2620#endif
2621 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2622 /* already did a bind, subsequent binds NOT allowed ! */
2623 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2624 return (EINVAL);
2625 }
2626#ifdef INVARIANTS
2627 if (p == NULL)
2628 panic("null proc/thread");
2629#endif
2630 if (addr != NULL) {
2631 switch (addr->sa_family) {
2632 case AF_INET:
2633 {
2634 struct sockaddr_in *sin;
2635
2636 /* IPV6_V6ONLY socket? */
2637 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2638 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2639 return (EINVAL);
2640 }
2641 if (addr->sa_len != sizeof(*sin)) {
2642 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2643 return (EINVAL);
2644 }
2645 sin = (struct sockaddr_in *)addr;
2646 lport = sin->sin_port;
2647 /*
2648 * For LOOPBACK the prison_local_ip4() call
2649 * will transmute the ip address to the
2650 * proper value.
2651 */
2652 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2653 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2654 return (error);
2655 }
2656 if (sin->sin_addr.s_addr != INADDR_ANY) {
2657 bindall = 0;
2658 }
2659 break;
2660 }
2661#ifdef INET6
2662 case AF_INET6:
2663 {
2664 /*
2665 * Only for pure IPv6 Address. (No IPv4
2666 * Mapped!)
2667 */
2668 struct sockaddr_in6 *sin6;
2669
2670 sin6 = (struct sockaddr_in6 *)addr;
2671
2672 if (addr->sa_len != sizeof(*sin6)) {
2673 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2674 return (EINVAL);
2675 }
2676 lport = sin6->sin6_port;
2677
2678 /*
2679 * For LOOPBACK the prison_local_ip6() call
2680 * will transmute the ipv6 address to the
2681 * proper value.
2682 */
2683 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2684 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2685 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2686 return (error);
2687 }
2688 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2689 bindall = 0;
2690 /* KAME hack: embed scopeid */
| 2320 SCTP_INP_INFO_WUNLOCK();
2321
2322 so->so_pcb = (caddr_t)inp;
2323
2324 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2325 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2326 /* UDP style socket */
2327 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2328 SCTP_PCB_FLAGS_UNBOUND);
2329 /* Be sure it is NON-BLOCKING IO for UDP */
2330 /* SCTP_SET_SO_NBIO(so); */
2331 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2332 /* TCP style socket */
2333 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2334 SCTP_PCB_FLAGS_UNBOUND);
2335 /* Be sure we have blocking IO by default */
2336 SCTP_CLEAR_SO_NBIO(so);
2337 } else {
2338 /*
2339 * unsupported socket type (RAW, etc)- in case we missed it
2340 * in protosw
2341 */
2342 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2343 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2344 return (EOPNOTSUPP);
2345 }
2346 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2347 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2348 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2349 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2350 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2351 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2352 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2353 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2354 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2355 }
2356 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2357 &inp->sctp_hashmark);
2358 if (inp->sctp_tcbhash == NULL) {
2359 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2360 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2361 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2362 return (ENOBUFS);
2363 }
2364 inp->def_vrf_id = vrf_id;
2365
2366 SCTP_INP_INFO_WLOCK();
2367 SCTP_INP_LOCK_INIT(inp);
2368 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2369 SCTP_INP_READ_INIT(inp);
2370 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2371 /* lock the new ep */
2372 SCTP_INP_WLOCK(inp);
2373
2374 /* add it to the info area */
2375 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2376 SCTP_INP_INFO_WUNLOCK();
2377
2378 TAILQ_INIT(&inp->read_queue);
2379 LIST_INIT(&inp->sctp_addr_list);
2380
2381 LIST_INIT(&inp->sctp_asoc_list);
2382
2383#ifdef SCTP_TRACK_FREED_ASOCS
2384 /* TEMP CODE */
2385 LIST_INIT(&inp->sctp_asoc_free_list);
2386#endif
2387 /* Init the timer structure for signature change */
2388 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2389 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2390
2391 /* now init the actual endpoint default data */
2392 m = &inp->sctp_ep;
2393
2394 /* setup the base timeout information */
2395 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
2396 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
2397 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2398 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2399 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2400 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2401 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2402 /* all max/min max are in ms */
2403 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2404 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2405 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2406 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2407 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2408
2409 m->max_open_streams_intome = MAX_SCTP_STREAMS;
2410
2411 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2412 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2413 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2414 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2415 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2416 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2417 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2418 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2419 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2420 } else {
2421 /* sysctl done with invalid value, set to 2581 */
2422 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2423 }
2424 /* number of streams to pre-open on a association */
2425 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2426
2427 /* Add adaptation cookie */
2428 m->adaptation_layer_indicator = 0x504C5253;
2429
2430 /* seed random number generator */
2431 m->random_counter = 1;
2432 m->store_at = SCTP_SIGNATURE_SIZE;
2433 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2434 sctp_fill_random_store(m);
2435
2436 /* Minimum cookie size */
2437 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2438 sizeof(struct sctp_state_cookie);
2439 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2440
2441 /* Setup the initial secret */
2442 (void)SCTP_GETTIME_TIMEVAL(&time);
2443 m->time_of_secret_change = time.tv_sec;
2444
2445 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2446 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2447 }
2448 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2449
2450 /* How long is a cookie good for ? */
2451 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2452 /*
2453 * Initialize authentication parameters
2454 */
2455 m->local_hmacs = sctp_default_supported_hmaclist();
2456 m->local_auth_chunks = sctp_alloc_chunklist();
2457 sctp_auth_set_default_chunks(m->local_auth_chunks);
2458 LIST_INIT(&m->shared_keys);
2459 /* add default NULL key as key id 0 */
2460 null_key = sctp_alloc_sharedkey();
2461 sctp_insert_sharedkey(&m->shared_keys, null_key);
2462 SCTP_INP_WUNLOCK(inp);
2463#ifdef SCTP_LOG_CLOSING
2464 sctp_log_closing(inp, NULL, 12);
2465#endif
2466 return (error);
2467}
2468
2469
2470void
2471sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2472 struct sctp_tcb *stcb)
2473{
2474 struct sctp_nets *net;
2475 uint16_t lport, rport;
2476 struct sctppcbhead *head;
2477 struct sctp_laddr *laddr, *oladdr;
2478
2479 atomic_add_int(&stcb->asoc.refcnt, 1);
2480 SCTP_TCB_UNLOCK(stcb);
2481 SCTP_INP_INFO_WLOCK();
2482 SCTP_INP_WLOCK(old_inp);
2483 SCTP_INP_WLOCK(new_inp);
2484 SCTP_TCB_LOCK(stcb);
2485 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2486
2487 new_inp->sctp_ep.time_of_secret_change =
2488 old_inp->sctp_ep.time_of_secret_change;
2489 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2490 sizeof(old_inp->sctp_ep.secret_key));
2491 new_inp->sctp_ep.current_secret_number =
2492 old_inp->sctp_ep.current_secret_number;
2493 new_inp->sctp_ep.last_secret_number =
2494 old_inp->sctp_ep.last_secret_number;
2495 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2496
2497 /* make it so new data pours into the new socket */
2498 stcb->sctp_socket = new_inp->sctp_socket;
2499 stcb->sctp_ep = new_inp;
2500
2501 /* Copy the port across */
2502 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2503 rport = stcb->rport;
2504 /* Pull the tcb from the old association */
2505 LIST_REMOVE(stcb, sctp_tcbhash);
2506 LIST_REMOVE(stcb, sctp_tcblist);
2507 if (stcb->asoc.in_asocid_hash) {
2508 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2509 }
2510 /* Now insert the new_inp into the TCP connected hash */
2511 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2512 SCTP_BASE_INFO(hashtcpmark))];
2513
2514 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2515 /* Its safe to access */
2516 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2517
2518 /* Now move the tcb into the endpoint list */
2519 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2520 /*
2521 * Question, do we even need to worry about the ep-hash since we
2522 * only have one connection? Probably not :> so lets get rid of it
2523 * and not suck up any kernel memory in that.
2524 */
2525 if (stcb->asoc.in_asocid_hash) {
2526 struct sctpasochead *lhd;
2527
2528 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2529 new_inp->hashasocidmark)];
2530 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2531 }
2532 /* Ok. Let's restart timer. */
2533 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2534 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2535 stcb, net);
2536 }
2537
2538 SCTP_INP_INFO_WUNLOCK();
2539 if (new_inp->sctp_tcbhash != NULL) {
2540 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2541 new_inp->sctp_tcbhash = NULL;
2542 }
2543 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2544 /* Subset bound, so copy in the laddr list from the old_inp */
2545 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2546 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2547 if (laddr == NULL) {
2548 /*
2549 * Gak, what can we do? This assoc is really
2550 * HOSED. We probably should send an abort
2551 * here.
2552 */
2553 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2554 continue;
2555 }
2556 SCTP_INCR_LADDR_COUNT();
2557 bzero(laddr, sizeof(*laddr));
2558 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2559 laddr->ifa = oladdr->ifa;
2560 atomic_add_int(&laddr->ifa->refcount, 1);
2561 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2562 sctp_nxt_addr);
2563 new_inp->laddr_count++;
2564 }
2565 }
2566 /*
2567 * Now any running timers need to be adjusted since we really don't
2568 * care if they are running or not just blast in the new_inp into
2569 * all of them.
2570 */
2571
2572 stcb->asoc.hb_timer.ep = (void *)new_inp;
2573 stcb->asoc.dack_timer.ep = (void *)new_inp;
2574 stcb->asoc.asconf_timer.ep = (void *)new_inp;
2575 stcb->asoc.strreset_timer.ep = (void *)new_inp;
2576 stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2577 stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2578 stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2579 stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2580 /* now what about the nets? */
2581 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2582 net->pmtu_timer.ep = (void *)new_inp;
2583 net->rxt_timer.ep = (void *)new_inp;
2584 net->fr_timer.ep = (void *)new_inp;
2585 }
2586 SCTP_INP_WUNLOCK(new_inp);
2587 SCTP_INP_WUNLOCK(old_inp);
2588}
2589
2590
2591
2592
2593/* sctp_ifap is used to bypass normal local address validation checks */
2594int
2595sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2596 struct sctp_ifa *sctp_ifap, struct thread *p)
2597{
2598 /* bind a ep to a socket address */
2599 struct sctppcbhead *head;
2600 struct sctp_inpcb *inp, *inp_tmp;
2601 struct inpcb *ip_inp;
2602 int port_reuse_active = 0;
2603 int bindall;
2604 uint16_t lport;
2605 int error;
2606 uint32_t vrf_id;
2607
2608 lport = 0;
2609 error = 0;
2610 bindall = 1;
2611 inp = (struct sctp_inpcb *)so->so_pcb;
2612 ip_inp = (struct inpcb *)so->so_pcb;
2613#ifdef SCTP_DEBUG
2614 if (addr) {
2615 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2616 ntohs(((struct sockaddr_in *)addr)->sin_port));
2617 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2618 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2619 }
2620#endif
2621 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2622 /* already did a bind, subsequent binds NOT allowed ! */
2623 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2624 return (EINVAL);
2625 }
2626#ifdef INVARIANTS
2627 if (p == NULL)
2628 panic("null proc/thread");
2629#endif
2630 if (addr != NULL) {
2631 switch (addr->sa_family) {
2632 case AF_INET:
2633 {
2634 struct sockaddr_in *sin;
2635
2636 /* IPV6_V6ONLY socket? */
2637 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2638 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2639 return (EINVAL);
2640 }
2641 if (addr->sa_len != sizeof(*sin)) {
2642 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2643 return (EINVAL);
2644 }
2645 sin = (struct sockaddr_in *)addr;
2646 lport = sin->sin_port;
2647 /*
2648 * For LOOPBACK the prison_local_ip4() call
2649 * will transmute the ip address to the
2650 * proper value.
2651 */
2652 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2653 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2654 return (error);
2655 }
2656 if (sin->sin_addr.s_addr != INADDR_ANY) {
2657 bindall = 0;
2658 }
2659 break;
2660 }
2661#ifdef INET6
2662 case AF_INET6:
2663 {
2664 /*
2665 * Only for pure IPv6 Address. (No IPv4
2666 * Mapped!)
2667 */
2668 struct sockaddr_in6 *sin6;
2669
2670 sin6 = (struct sockaddr_in6 *)addr;
2671
2672 if (addr->sa_len != sizeof(*sin6)) {
2673 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2674 return (EINVAL);
2675 }
2676 lport = sin6->sin6_port;
2677
2678 /*
2679 * For LOOPBACK the prison_local_ip6() call
2680 * will transmute the ipv6 address to the
2681 * proper value.
2682 */
2683 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2684 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2685 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2686 return (error);
2687 }
2688 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2689 bindall = 0;
2690 /* KAME hack: embed scopeid */
|
2691 if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
| 2691 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
|
2692 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2693 return (EINVAL);
2694 }
2695 }
2696 /* this must be cleared for ifa_ifwithaddr() */
2697 sin6->sin6_scope_id = 0;
2698 break;
2699 }
2700#endif
2701 default:
2702 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2703 return (EAFNOSUPPORT);
2704 }
2705 }
2706 SCTP_INP_INFO_WLOCK();
2707 SCTP_INP_WLOCK(inp);
2708 /* Setup a vrf_id to be the default for the non-bind-all case. */
2709 vrf_id = inp->def_vrf_id;
2710
2711 /* increase our count due to the unlock we do */
2712 SCTP_INP_INCR_REF(inp);
2713 if (lport) {
2714 /*
2715 * Did the caller specify a port? if so we must see if a ep
2716 * already has this one bound.
2717 */
2718 /* got to be root to get at low ports */
2719 if (ntohs(lport) < IPPORT_RESERVED) {
2720 if (p && (error =
2721 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2722 )) {
2723 SCTP_INP_DECR_REF(inp);
2724 SCTP_INP_WUNLOCK(inp);
2725 SCTP_INP_INFO_WUNLOCK();
2726 return (error);
2727 }
2728 }
2729 if (p == NULL) {
2730 SCTP_INP_DECR_REF(inp);
2731 SCTP_INP_WUNLOCK(inp);
2732 SCTP_INP_INFO_WUNLOCK();
2733 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2734 return (error);
2735 }
2736 SCTP_INP_WUNLOCK(inp);
2737 if (bindall) {
2738 vrf_id = inp->def_vrf_id;
2739 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2740 if (inp_tmp != NULL) {
2741 /*
2742 * lock guy returned and lower count note
2743 * that we are not bound so inp_tmp should
2744 * NEVER be inp. And it is this inp
2745 * (inp_tmp) that gets the reference bump,
2746 * so we must lower it.
2747 */
2748 SCTP_INP_DECR_REF(inp_tmp);
2749 /* unlock info */
2750 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2751 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2752 /*
2753 * Ok, must be one-2-one and
2754 * allowing port re-use
2755 */
2756 port_reuse_active = 1;
2757 goto continue_anyway;
2758 }
2759 SCTP_INP_DECR_REF(inp);
2760 SCTP_INP_INFO_WUNLOCK();
2761 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2762 return (EADDRINUSE);
2763 }
2764 } else {
2765 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2766 if (inp_tmp != NULL) {
2767 /*
2768 * lock guy returned and lower count note
2769 * that we are not bound so inp_tmp should
2770 * NEVER be inp. And it is this inp
2771 * (inp_tmp) that gets the reference bump,
2772 * so we must lower it.
2773 */
2774 SCTP_INP_DECR_REF(inp_tmp);
2775 /* unlock info */
2776 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2777 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2778 /*
2779 * Ok, must be one-2-one and
2780 * allowing port re-use
2781 */
2782 port_reuse_active = 1;
2783 goto continue_anyway;
2784 }
2785 SCTP_INP_DECR_REF(inp);
2786 SCTP_INP_INFO_WUNLOCK();
2787 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2788 return (EADDRINUSE);
2789 }
2790 }
2791continue_anyway:
2792 SCTP_INP_WLOCK(inp);
2793 if (bindall) {
2794 /* verify that no lport is not used by a singleton */
2795 if ((port_reuse_active == 0) &&
2796 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2797 ) {
2798 /* Sorry someone already has this one bound */
2799 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2800 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2801 port_reuse_active = 1;
2802 } else {
2803 SCTP_INP_DECR_REF(inp);
2804 SCTP_INP_WUNLOCK(inp);
2805 SCTP_INP_INFO_WUNLOCK();
2806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2807 return (EADDRINUSE);
2808 }
2809 }
2810 }
2811 } else {
2812 uint16_t first, last, candidate;
2813 uint16_t count;
2814 int done;
2815
2816 if (ip_inp->inp_flags & INP_HIGHPORT) {
| 2692 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2693 return (EINVAL);
2694 }
2695 }
2696 /* this must be cleared for ifa_ifwithaddr() */
2697 sin6->sin6_scope_id = 0;
2698 break;
2699 }
2700#endif
2701 default:
2702 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2703 return (EAFNOSUPPORT);
2704 }
2705 }
2706 SCTP_INP_INFO_WLOCK();
2707 SCTP_INP_WLOCK(inp);
2708 /* Setup a vrf_id to be the default for the non-bind-all case. */
2709 vrf_id = inp->def_vrf_id;
2710
2711 /* increase our count due to the unlock we do */
2712 SCTP_INP_INCR_REF(inp);
2713 if (lport) {
2714 /*
2715 * Did the caller specify a port? if so we must see if a ep
2716 * already has this one bound.
2717 */
2718 /* got to be root to get at low ports */
2719 if (ntohs(lport) < IPPORT_RESERVED) {
2720 if (p && (error =
2721 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2722 )) {
2723 SCTP_INP_DECR_REF(inp);
2724 SCTP_INP_WUNLOCK(inp);
2725 SCTP_INP_INFO_WUNLOCK();
2726 return (error);
2727 }
2728 }
2729 if (p == NULL) {
2730 SCTP_INP_DECR_REF(inp);
2731 SCTP_INP_WUNLOCK(inp);
2732 SCTP_INP_INFO_WUNLOCK();
2733 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2734 return (error);
2735 }
2736 SCTP_INP_WUNLOCK(inp);
2737 if (bindall) {
2738 vrf_id = inp->def_vrf_id;
2739 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2740 if (inp_tmp != NULL) {
2741 /*
2742 * lock guy returned and lower count note
2743 * that we are not bound so inp_tmp should
2744 * NEVER be inp. And it is this inp
2745 * (inp_tmp) that gets the reference bump,
2746 * so we must lower it.
2747 */
2748 SCTP_INP_DECR_REF(inp_tmp);
2749 /* unlock info */
2750 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2751 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2752 /*
2753 * Ok, must be one-2-one and
2754 * allowing port re-use
2755 */
2756 port_reuse_active = 1;
2757 goto continue_anyway;
2758 }
2759 SCTP_INP_DECR_REF(inp);
2760 SCTP_INP_INFO_WUNLOCK();
2761 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2762 return (EADDRINUSE);
2763 }
2764 } else {
2765 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2766 if (inp_tmp != NULL) {
2767 /*
2768 * lock guy returned and lower count note
2769 * that we are not bound so inp_tmp should
2770 * NEVER be inp. And it is this inp
2771 * (inp_tmp) that gets the reference bump,
2772 * so we must lower it.
2773 */
2774 SCTP_INP_DECR_REF(inp_tmp);
2775 /* unlock info */
2776 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2777 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2778 /*
2779 * Ok, must be one-2-one and
2780 * allowing port re-use
2781 */
2782 port_reuse_active = 1;
2783 goto continue_anyway;
2784 }
2785 SCTP_INP_DECR_REF(inp);
2786 SCTP_INP_INFO_WUNLOCK();
2787 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2788 return (EADDRINUSE);
2789 }
2790 }
2791continue_anyway:
2792 SCTP_INP_WLOCK(inp);
2793 if (bindall) {
2794 /* verify that no lport is not used by a singleton */
2795 if ((port_reuse_active == 0) &&
2796 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2797 ) {
2798 /* Sorry someone already has this one bound */
2799 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2800 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2801 port_reuse_active = 1;
2802 } else {
2803 SCTP_INP_DECR_REF(inp);
2804 SCTP_INP_WUNLOCK(inp);
2805 SCTP_INP_INFO_WUNLOCK();
2806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2807 return (EADDRINUSE);
2808 }
2809 }
2810 }
2811 } else {
2812 uint16_t first, last, candidate;
2813 uint16_t count;
2814 int done;
2815
2816 if (ip_inp->inp_flags & INP_HIGHPORT) {
|
2817 first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto);
2818 last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto);
| 2817 first = MODULE_GLOBAL(ipport_hifirstauto);
2818 last = MODULE_GLOBAL(ipport_hilastauto);
|
2819 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2820 if (p && (error =
2821 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2822 )) {
2823 SCTP_INP_DECR_REF(inp);
2824 SCTP_INP_WUNLOCK(inp);
2825 SCTP_INP_INFO_WUNLOCK();
2826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2827 return (error);
2828 }
| 2819 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2820 if (p && (error =
2821 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2822 )) {
2823 SCTP_INP_DECR_REF(inp);
2824 SCTP_INP_WUNLOCK(inp);
2825 SCTP_INP_INFO_WUNLOCK();
2826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2827 return (error);
2828 }
|
2829 first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto);
2830 last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto);
| 2829 first = MODULE_GLOBAL(ipport_lowfirstauto);
2830 last = MODULE_GLOBAL(ipport_lowlastauto);
|
2831 } else {
| 2831 } else {
|
2832 first = MODULE_GLOBAL(MOD_INET, ipport_firstauto);
2833 last = MODULE_GLOBAL(MOD_INET, ipport_lastauto);
| 2832 first = MODULE_GLOBAL(ipport_firstauto);
2833 last = MODULE_GLOBAL(ipport_lastauto);
|
2834 }
2835 if (first > last) {
2836 uint16_t temp;
2837
2838 temp = first;
2839 first = last;
2840 last = temp;
2841 }
2842 count = last - first + 1; /* number of candidates */
2843 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2844
2845 done = 0;
2846 while (!done) {
2847 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2848 done = 1;
2849 }
2850 if (!done) {
2851 if (--count == 0) {
2852 SCTP_INP_DECR_REF(inp);
2853 SCTP_INP_WUNLOCK(inp);
2854 SCTP_INP_INFO_WUNLOCK();
2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2856 return (EADDRINUSE);
2857 }
2858 if (candidate == last)
2859 candidate = first;
2860 else
2861 candidate = candidate + 1;
2862 }
2863 }
2864 lport = htons(candidate);
2865 }
2866 SCTP_INP_DECR_REF(inp);
2867 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2868 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2869 /*
2870 * this really should not happen. The guy did a non-blocking
2871 * bind and then did a close at the same time.
2872 */
2873 SCTP_INP_WUNLOCK(inp);
2874 SCTP_INP_INFO_WUNLOCK();
2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2876 return (EINVAL);
2877 }
2878 /* ok we look clear to give out this port, so lets setup the binding */
2879 if (bindall) {
2880 /* binding to all addresses, so just set in the proper flags */
2881 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2882 /* set the automatic addr changes from kernel flag */
2883 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2884 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2885 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2886 } else {
2887 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2888 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2889 }
2890 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2891 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2892 } else {
2893 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2894 }
2895 /*
2896 * set the automatic mobility_base from kernel flag (by
2897 * micchie)
2898 */
2899 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2900 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2901 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2902 } else {
2903 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2904 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2905 }
2906 /*
2907 * set the automatic mobility_fasthandoff from kernel flag
2908 * (by micchie)
2909 */
2910 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2911 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2912 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2913 } else {
2914 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2915 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2916 }
2917 } else {
2918 /*
2919 * bind specific, make sure flags is off and add a new
2920 * address structure to the sctp_addr_list inside the ep
2921 * structure.
2922 *
2923 * We will need to allocate one and insert it at the head. The
2924 * socketopt call can just insert new addresses in there as
2925 * well. It will also have to do the embed scope kame hack
2926 * too (before adding).
2927 */
2928 struct sctp_ifa *ifa;
2929 struct sockaddr_storage store_sa;
2930
2931 memset(&store_sa, 0, sizeof(store_sa));
2932 if (addr->sa_family == AF_INET) {
2933 struct sockaddr_in *sin;
2934
2935 sin = (struct sockaddr_in *)&store_sa;
2936 memcpy(sin, addr, sizeof(struct sockaddr_in));
2937 sin->sin_port = 0;
2938 } else if (addr->sa_family == AF_INET6) {
2939 struct sockaddr_in6 *sin6;
2940
2941 sin6 = (struct sockaddr_in6 *)&store_sa;
2942 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2943 sin6->sin6_port = 0;
2944 }
2945 /*
2946 * first find the interface with the bound address need to
2947 * zero out the port to find the address! yuck! can't do
2948 * this earlier since need port for sctp_pcb_findep()
2949 */
2950 if (sctp_ifap != NULL)
2951 ifa = sctp_ifap;
2952 else {
2953 /*
2954 * Note for BSD we hit here always other O/S's will
2955 * pass things in via the sctp_ifap argument
2956 * (Panda).
2957 */
2958 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2959 vrf_id, SCTP_ADDR_NOT_LOCKED);
2960 }
2961 if (ifa == NULL) {
2962 /* Can't find an interface with that address */
2963 SCTP_INP_WUNLOCK(inp);
2964 SCTP_INP_INFO_WUNLOCK();
2965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2966 return (EADDRNOTAVAIL);
2967 }
2968 if (addr->sa_family == AF_INET6) {
2969 /* GAK, more FIXME IFA lock? */
2970 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2971 /* Can't bind a non-existent addr. */
2972 SCTP_INP_WUNLOCK(inp);
2973 SCTP_INP_INFO_WUNLOCK();
2974 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2975 return (EINVAL);
2976 }
2977 }
2978 /* we're not bound all */
2979 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2980 /* allow bindx() to send ASCONF's for binding changes */
2981 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2982 /* clear automatic addr changes from kernel flag */
2983 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2984
2985 /* add this address to the endpoint list */
2986 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2987 if (error != 0) {
2988 SCTP_INP_WUNLOCK(inp);
2989 SCTP_INP_INFO_WUNLOCK();
2990 return (error);
2991 }
2992 inp->laddr_count++;
2993 }
2994 /* find the bucket */
2995 if (port_reuse_active) {
2996 /* Put it into tcp 1-2-1 hash */
2997 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2998 SCTP_BASE_INFO(hashtcpmark))];
2999 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3000 } else {
3001 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
3002 SCTP_BASE_INFO(hashmark))];
3003 }
3004 /* put it in the bucket */
3005 LIST_INSERT_HEAD(head, inp, sctp_hash);
3006 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3007 head, ntohs(lport), port_reuse_active);
3008 /* set in the port */
3009 inp->sctp_lport = lport;
3010
3011 /* turn off just the unbound flag */
3012 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3013 SCTP_INP_WUNLOCK(inp);
3014 SCTP_INP_INFO_WUNLOCK();
3015 return (0);
3016}
3017
3018
3019static void
3020sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
3021{
3022 struct sctp_iterator *it;
3023
3024 /*
3025 * We enter with the only the ITERATOR_LOCK in place and a write
3026 * lock on the inp_info stuff.
3027 */
3028
3029 /*
3030 * Go through all iterators, we must do this since it is possible
3031 * that some iterator does NOT have the lock, but is waiting for it.
3032 * And the one that had the lock has either moved in the last
3033 * iteration or we just cleared it above. We need to find all of
3034 * those guys. The list of iterators should never be very big
3035 * though.
3036 */
3037 TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) {
3038 if (it == inp->inp_starting_point_for_iterator)
3039 /* skip this guy, he's special */
3040 continue;
3041 if (it->inp == inp) {
3042 /*
3043 * This is tricky and we DON'T lock the iterator.
3044 * Reason is he's running but waiting for me since
3045 * inp->inp_starting_point_for_iterator has the lock
3046 * on me (the guy above we skipped). This tells us
3047 * its is not running but waiting for
3048 * inp->inp_starting_point_for_iterator to be
3049 * released by the guy that does have our INP in a
3050 * lock.
3051 */
3052 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3053 it->inp = NULL;
3054 it->stcb = NULL;
3055 } else {
3056 /* set him up to do the next guy not me */
3057 it->inp = inp_next;
3058 it->stcb = NULL;
3059 }
3060 }
3061 }
3062 it = inp->inp_starting_point_for_iterator;
3063 if (it) {
3064 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3065 it->inp = NULL;
3066 } else {
3067 it->inp = inp_next;
3068 }
3069 it->stcb = NULL;
3070 }
3071}
3072
3073/* release sctp_inpcb unbind the port */
3074void
3075sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3076{
3077 /*
3078 * Here we free a endpoint. We must find it (if it is in the Hash
3079 * table) and remove it from there. Then we must also find it in the
3080 * overall list and remove it from there. After all removals are
3081 * complete then any timer has to be stopped. Then start the actual
3082 * freeing. a) Any local lists. b) Any associations. c) The hash of
3083 * all associations. d) finally the ep itself.
3084 */
3085 struct sctp_pcb *m;
3086 struct sctp_inpcb *inp_save;
3087 struct sctp_tcb *asoc, *nasoc;
3088 struct sctp_laddr *laddr, *nladdr;
3089 struct inpcb *ip_pcb;
3090 struct socket *so;
3091
3092 struct sctp_queued_to_read *sq;
3093
3094
3095 int cnt;
3096 sctp_sharedkey_t *shared_key;
3097
3098
3099#ifdef SCTP_LOG_CLOSING
3100 sctp_log_closing(inp, NULL, 0);
3101#endif
3102 SCTP_ITERATOR_LOCK();
3103 so = inp->sctp_socket;
3104 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3105 /* been here before.. eeks.. get out of here */
3106 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3107 SCTP_ITERATOR_UNLOCK();
3108#ifdef SCTP_LOG_CLOSING
3109 sctp_log_closing(inp, NULL, 1);
3110#endif
3111 return;
3112 }
3113 SCTP_ASOC_CREATE_LOCK(inp);
3114 SCTP_INP_INFO_WLOCK();
3115
3116 SCTP_INP_WLOCK(inp);
3117 /* First time through we have the socket lock, after that no more. */
3118 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3119 /*
3120 * Once we are in we can remove the flag from = 1 is only
3121 * passed from the actual closing routines that are called
3122 * via the sockets layer.
3123 */
3124 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3125 /* socket is gone, so no more wakeups allowed */
3126 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3127 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3128 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3129 }
3130 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3131 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3132
3133 if (inp->control) {
3134 sctp_m_freem(inp->control);
3135 inp->control = NULL;
3136 }
3137 if (inp->pkt) {
3138 sctp_m_freem(inp->pkt);
3139 inp->pkt = NULL;
3140 }
3141 m = &inp->sctp_ep;
3142 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3143 * here but I will be nice :> (i.e.
3144 * ip_pcb = ep;) */
3145 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3146 int cnt_in_sd;
3147
3148 cnt_in_sd = 0;
3149 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3150 asoc = nasoc) {
3151 SCTP_TCB_LOCK(asoc);
3152 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3153 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3154 /* Skip guys being freed */
3155 /* asoc->sctp_socket = NULL; FIXME MT */
3156 cnt_in_sd++;
3157 SCTP_TCB_UNLOCK(asoc);
3158 continue;
3159 }
3160 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3161 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3162 (asoc->asoc.total_output_queue_size == 0)) {
3163 /*
3164 * If we have data in queue, we don't want
3165 * to just free since the app may have done,
3166 * send()/close or connect/send/close. And
3167 * it wants the data to get across first.
3168 */
3169 /* Just abandon things in the front states */
3170 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3171 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3172 cnt_in_sd++;
3173 }
3174 continue;
3175 }
3176 /* Disconnect the socket please */
3177 asoc->sctp_socket = NULL;
3178 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3179 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3180 (asoc->asoc.control_pdapi) ||
3181 (asoc->asoc.size_on_all_streams > 0) ||
3182 (so && (so->so_rcv.sb_cc > 0))
3183 ) {
3184 /* Left with Data unread */
3185 struct mbuf *op_err;
3186
3187 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3188 0, M_DONTWAIT, 1, MT_DATA);
3189 if (op_err) {
3190 /* Fill in the user initiated abort */
3191 struct sctp_paramhdr *ph;
3192 uint32_t *ippp;
3193
3194 SCTP_BUF_LEN(op_err) =
3195 sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3196 ph = mtod(op_err,
3197 struct sctp_paramhdr *);
3198 ph->param_type = htons(
3199 SCTP_CAUSE_USER_INITIATED_ABT);
3200 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3201 ippp = (uint32_t *) (ph + 1);
3202 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3203 }
3204 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3205#if defined(SCTP_PANIC_ON_ABORT)
3206 panic("inpcb_free does an abort");
3207#endif
3208 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3209 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3210 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3211 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3212 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3213 }
3214 if (sctp_free_assoc(inp, asoc,
3215 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3216 cnt_in_sd++;
3217 }
3218 continue;
3219 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3220 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3221 (asoc->asoc.stream_queue_cnt == 0)
3222 ) {
3223 if (asoc->asoc.locked_on_sending) {
3224 goto abort_anyway;
3225 }
3226 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3227 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3228 /*
3229 * there is nothing queued to send,
3230 * so I send shutdown
3231 */
3232 sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3233 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3234 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3235 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3236 }
3237 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3238 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3239 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3240 asoc->asoc.primary_destination);
3241 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3242 asoc->asoc.primary_destination);
3243 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3244 }
3245 } else {
3246 /* mark into shutdown pending */
3247 struct sctp_stream_queue_pending *sp;
3248
3249 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3250 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3251 asoc->asoc.primary_destination);
3252 if (asoc->asoc.locked_on_sending) {
3253 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3254 sctp_streamhead);
3255 if (sp == NULL) {
3256 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3257 asoc->asoc.locked_on_sending,
3258 asoc->asoc.locked_on_sending->stream_no);
3259 } else {
3260 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3261 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3262 }
3263 }
3264 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3265 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3266 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3267 struct mbuf *op_err;
3268
3269 abort_anyway:
3270 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3271 0, M_DONTWAIT, 1, MT_DATA);
3272 if (op_err) {
3273 /*
3274 * Fill in the user
3275 * initiated abort
3276 */
3277 struct sctp_paramhdr *ph;
3278 uint32_t *ippp;
3279
3280 SCTP_BUF_LEN(op_err) =
3281 (sizeof(struct sctp_paramhdr) +
3282 sizeof(uint32_t));
3283 ph = mtod(op_err,
3284 struct sctp_paramhdr *);
3285 ph->param_type = htons(
3286 SCTP_CAUSE_USER_INITIATED_ABT);
3287 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3288 ippp = (uint32_t *) (ph + 1);
3289 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3290 }
3291 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3292#if defined(SCTP_PANIC_ON_ABORT)
3293 panic("inpcb_free does an abort");
3294#endif
3295
3296 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3297 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3298 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3299 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3300 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3301 }
3302 if (sctp_free_assoc(inp, asoc,
3303 SCTP_PCBFREE_NOFORCE,
3304 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3305 cnt_in_sd++;
3306 }
3307 continue;
3308 } else {
3309 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3310 }
3311 }
3312 cnt_in_sd++;
3313 SCTP_TCB_UNLOCK(asoc);
3314 }
3315 /* now is there some left in our SHUTDOWN state? */
3316 if (cnt_in_sd) {
3317 SCTP_INP_WUNLOCK(inp);
3318 SCTP_ASOC_CREATE_UNLOCK(inp);
3319 SCTP_INP_INFO_WUNLOCK();
3320 SCTP_ITERATOR_UNLOCK();
3321#ifdef SCTP_LOG_CLOSING
3322 sctp_log_closing(inp, NULL, 2);
3323#endif
3324 inp->sctp_socket = NULL;
3325 return;
3326 }
3327 }
3328 inp->sctp_socket = NULL;
3329 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3330 SCTP_PCB_FLAGS_UNBOUND) {
3331 /*
3332 * ok, this guy has been bound. It's port is somewhere in
3333 * the SCTP_BASE_INFO(hash table). Remove it!
3334 */
3335 LIST_REMOVE(inp, sctp_hash);
3336 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3337 }
3338 /*
3339 * If there is a timer running to kill us, forget it, since it may
3340 * have a contest on the INP lock.. which would cause us to die ...
3341 */
3342 cnt = 0;
3343 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3344 asoc = nasoc) {
3345 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3346 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3347 cnt++;
3348 continue;
3349 }
3350 /* Free associations that are NOT killing us */
3351 SCTP_TCB_LOCK(asoc);
3352 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3353 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3354 struct mbuf *op_err;
3355 uint32_t *ippp;
3356
3357 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3358 0, M_DONTWAIT, 1, MT_DATA);
3359 if (op_err) {
3360 /* Fill in the user initiated abort */
3361 struct sctp_paramhdr *ph;
3362
3363 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3364 sizeof(uint32_t));
3365 ph = mtod(op_err, struct sctp_paramhdr *);
3366 ph->param_type = htons(
3367 SCTP_CAUSE_USER_INITIATED_ABT);
3368 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3369 ippp = (uint32_t *) (ph + 1);
3370 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3371
3372 }
3373 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3374#if defined(SCTP_PANIC_ON_ABORT)
3375 panic("inpcb_free does an abort");
3376#endif
3377 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3378 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3379 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3380 cnt++;
3381 SCTP_TCB_UNLOCK(asoc);
3382 continue;
3383 }
3384 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3385 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3386 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3387 }
3388 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3389 cnt++;
3390 }
3391 }
3392 if (cnt) {
3393 /* Ok we have someone out there that will kill us */
3394 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3395 SCTP_INP_WUNLOCK(inp);
3396 SCTP_ASOC_CREATE_UNLOCK(inp);
3397 SCTP_INP_INFO_WUNLOCK();
3398 SCTP_ITERATOR_UNLOCK();
3399#ifdef SCTP_LOG_CLOSING
3400 sctp_log_closing(inp, NULL, 3);
3401#endif
3402 return;
3403 }
3404 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3405 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3406 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3407 SCTP_INP_WUNLOCK(inp);
3408 SCTP_ASOC_CREATE_UNLOCK(inp);
3409 SCTP_INP_INFO_WUNLOCK();
3410 SCTP_ITERATOR_UNLOCK();
3411#ifdef SCTP_LOG_CLOSING
3412 sctp_log_closing(inp, NULL, 4);
3413#endif
3414 return;
3415 }
3416 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3417 inp->sctp_ep.signature_change.type = 0;
3418 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3419
3420#ifdef SCTP_LOG_CLOSING
3421 sctp_log_closing(inp, NULL, 5);
3422#endif
3423
3424 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3425 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3426 /* Clear the read queue */
3427 if ((inp->sctp_asocidhash) != NULL) {
3428 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3429 inp->sctp_asocidhash = NULL;
3430 }
3431 /* sa_ignore FREED_MEMORY */
3432 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3433 /* Its only abandoned if it had data left */
3434 if (sq->length)
3435 SCTP_STAT_INCR(sctps_left_abandon);
3436
3437 TAILQ_REMOVE(&inp->read_queue, sq, next);
3438 sctp_free_remote_addr(sq->whoFrom);
3439 if (so)
3440 so->so_rcv.sb_cc -= sq->length;
3441 if (sq->data) {
3442 sctp_m_freem(sq->data);
3443 sq->data = NULL;
3444 }
3445 /*
3446 * no need to free the net count, since at this point all
3447 * assoc's are gone.
3448 */
3449 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3450 SCTP_DECR_READQ_COUNT();
3451 }
3452 /* Now the sctp_pcb things */
3453 /*
3454 * free each asoc if it is not already closed/free. we can't use the
3455 * macro here since le_next will get freed as part of the
3456 * sctp_free_assoc() call.
3457 */
3458 cnt = 0;
3459 if (so) {
3460#ifdef IPSEC
3461 ipsec_delete_pcbpolicy(ip_pcb);
3462#endif /* IPSEC */
3463
3464 /* Unlocks not needed since the socket is gone now */
3465 }
3466 if (ip_pcb->inp_options) {
3467 (void)sctp_m_free(ip_pcb->inp_options);
3468 ip_pcb->inp_options = 0;
3469 }
3470 if (ip_pcb->inp_moptions) {
3471 inp_freemoptions(ip_pcb->inp_moptions);
3472 ip_pcb->inp_moptions = 0;
3473 }
3474#ifdef INET6
3475 if (ip_pcb->inp_vflag & INP_IPV6) {
3476 struct in6pcb *in6p;
3477
3478 in6p = (struct in6pcb *)inp;
3479 ip6_freepcbopts(in6p->in6p_outputopts);
3480 }
3481#endif /* INET6 */
3482 ip_pcb->inp_vflag = 0;
3483 /* free up authentication fields */
3484 if (inp->sctp_ep.local_auth_chunks != NULL)
3485 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3486 if (inp->sctp_ep.local_hmacs != NULL)
3487 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3488
3489 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3490 while (shared_key) {
3491 LIST_REMOVE(shared_key, next);
3492 sctp_free_sharedkey(shared_key);
3493 /* sa_ignore FREED_MEMORY */
3494 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3495 }
3496
3497 inp_save = LIST_NEXT(inp, sctp_list);
3498 LIST_REMOVE(inp, sctp_list);
3499
3500 /* fix any iterators only after out of the list */
3501 sctp_iterator_inp_being_freed(inp, inp_save);
3502 /*
3503 * if we have an address list the following will free the list of
3504 * ifaddr's that are set into this ep. Again macro limitations here,
3505 * since the LIST_FOREACH could be a bad idea.
3506 */
3507 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3508 laddr = nladdr) {
3509 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3510 sctp_remove_laddr(laddr);
3511 }
3512
3513#ifdef SCTP_TRACK_FREED_ASOCS
3514 /* TEMP CODE */
3515 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3516 asoc = nasoc) {
3517 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3518 LIST_REMOVE(asoc, sctp_tcblist);
3519 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3520 SCTP_DECR_ASOC_COUNT();
3521 }
3522 /* *** END TEMP CODE *** */
3523#endif
3524 /* Now lets see about freeing the EP hash table. */
3525 if (inp->sctp_tcbhash != NULL) {
3526 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3527 inp->sctp_tcbhash = NULL;
3528 }
3529 /* Now we must put the ep memory back into the zone pool */
3530 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3531 SCTP_INP_LOCK_DESTROY(inp);
3532 SCTP_INP_READ_DESTROY(inp);
3533 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3534 SCTP_INP_INFO_WUNLOCK();
3535 SCTP_ITERATOR_UNLOCK();
3536 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3537 SCTP_DECR_EP_COUNT();
3538}
3539
3540
3541struct sctp_nets *
3542sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3543{
3544 struct sctp_nets *net;
3545
3546 /* locate the address */
3547 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3548 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3549 return (net);
3550 }
3551 return (NULL);
3552}
3553
3554
3555int
3556sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3557{
3558 struct sctp_ifa *sctp_ifa;
3559
3560 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3561 if (sctp_ifa) {
3562 return (1);
3563 } else {
3564 return (0);
3565 }
3566}
3567
3568/*
3569 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3570 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3571 * stats of stuff.
3572 */
3573int
3574sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3575 int set_scope, int from)
3576{
3577 /*
3578 * The following is redundant to the same lines in the
3579 * sctp_aloc_assoc() but is needed since other's call the add
3580 * address function
3581 */
3582 struct sctp_nets *net, *netfirst;
3583 int addr_inscope;
3584
3585 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3586 from);
3587 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3588
3589 netfirst = sctp_findnet(stcb, newaddr);
3590 if (netfirst) {
3591 /*
3592 * Lie and return ok, we don't want to make the association
3593 * go away for this behavior. It will happen in the TCP
3594 * model in a connected socket. It does not reach the hash
3595 * table until after the association is built so it can't be
3596 * found. Mark as reachable, since the initial creation will
3597 * have been cleared and the NOT_IN_ASSOC flag will have
3598 * been added... and we don't want to end up removing it
3599 * back out.
3600 */
3601 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3602 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3603 SCTP_ADDR_UNCONFIRMED);
3604 } else {
3605 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3606 }
3607
3608 return (0);
3609 }
3610 addr_inscope = 1;
3611 if (newaddr->sa_family == AF_INET) {
3612 struct sockaddr_in *sin;
3613
3614 sin = (struct sockaddr_in *)newaddr;
3615 if (sin->sin_addr.s_addr == 0) {
3616 /* Invalid address */
3617 return (-1);
3618 }
3619 /* zero out the bzero area */
3620 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3621
3622 /* assure len is set */
3623 sin->sin_len = sizeof(struct sockaddr_in);
3624 if (set_scope) {
3625#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3626 stcb->ipv4_local_scope = 1;
3627#else
3628 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3629 stcb->asoc.ipv4_local_scope = 1;
3630 }
3631#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3632 } else {
3633 /* Validate the address is in scope */
3634 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3635 (stcb->asoc.ipv4_local_scope == 0)) {
3636 addr_inscope = 0;
3637 }
3638 }
3639#ifdef INET6
3640 } else if (newaddr->sa_family == AF_INET6) {
3641 struct sockaddr_in6 *sin6;
3642
3643 sin6 = (struct sockaddr_in6 *)newaddr;
3644 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3645 /* Invalid address */
3646 return (-1);
3647 }
3648 /* assure len is set */
3649 sin6->sin6_len = sizeof(struct sockaddr_in6);
3650 if (set_scope) {
3651 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3652 stcb->asoc.loopback_scope = 1;
3653 stcb->asoc.local_scope = 0;
3654 stcb->asoc.ipv4_local_scope = 1;
3655 stcb->asoc.site_scope = 1;
3656 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3657 /*
3658 * If the new destination is a LINK_LOCAL we
3659 * must have common site scope. Don't set
3660 * the local scope since we may not share
3661 * all links, only loopback can do this.
3662 * Links on the local network would also be
3663 * on our private network for v4 too.
3664 */
3665 stcb->asoc.ipv4_local_scope = 1;
3666 stcb->asoc.site_scope = 1;
3667 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3668 /*
3669 * If the new destination is SITE_LOCAL then
3670 * we must have site scope in common.
3671 */
3672 stcb->asoc.site_scope = 1;
3673 }
3674 } else {
3675 /* Validate the address is in scope */
3676 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3677 (stcb->asoc.loopback_scope == 0)) {
3678 addr_inscope = 0;
3679 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3680 (stcb->asoc.local_scope == 0)) {
3681 addr_inscope = 0;
3682 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3683 (stcb->asoc.site_scope == 0)) {
3684 addr_inscope = 0;
3685 }
3686 }
3687#endif
3688 } else {
3689 /* not supported family type */
3690 return (-1);
3691 }
3692 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3693 if (net == NULL) {
3694 return (-1);
3695 }
3696 SCTP_INCR_RADDR_COUNT();
3697 bzero(net, sizeof(*net));
3698 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3699 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3700 if (newaddr->sa_family == AF_INET) {
3701 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3702 } else if (newaddr->sa_family == AF_INET6) {
3703 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3704 }
3705 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3706 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3707 stcb->asoc.loopback_scope = 1;
3708 stcb->asoc.ipv4_local_scope = 1;
3709 stcb->asoc.local_scope = 0;
3710 stcb->asoc.site_scope = 1;
3711 addr_inscope = 1;
3712 }
3713 net->failure_threshold = stcb->asoc.def_net_failure;
3714 if (addr_inscope == 0) {
3715 net->dest_state = (SCTP_ADDR_REACHABLE |
3716 SCTP_ADDR_OUT_OF_SCOPE);
3717 } else {
3718 if (from == SCTP_ADDR_IS_CONFIRMED)
3719 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3720 net->dest_state = SCTP_ADDR_REACHABLE;
3721 else
3722 net->dest_state = SCTP_ADDR_REACHABLE |
3723 SCTP_ADDR_UNCONFIRMED;
3724 }
3725 /*
3726 * We set this to 0, the timer code knows that this means its an
3727 * initial value
3728 */
3729 net->RTO = 0;
3730 net->RTO_measured = 0;
3731 stcb->asoc.numnets++;
3732 *(&net->ref_count) = 1;
3733 net->tos_flowlabel = 0;
3734 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3735 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3736 } else {
3737 net->port = 0;
3738 }
3739#ifdef INET
3740 if (newaddr->sa_family == AF_INET)
3741 net->tos_flowlabel = stcb->asoc.default_tos;
3742#endif
3743#ifdef INET6
3744 if (newaddr->sa_family == AF_INET6)
3745 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3746#endif
3747 /* Init the timer structure */
3748 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3749 SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3750 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3751
3752 /* Now generate a route for this guy */
3753#ifdef INET6
3754 /* KAME hack: embed scopeid */
3755 if (newaddr->sa_family == AF_INET6) {
3756 struct sockaddr_in6 *sin6;
3757
3758 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
| 2834 }
2835 if (first > last) {
2836 uint16_t temp;
2837
2838 temp = first;
2839 first = last;
2840 last = temp;
2841 }
2842 count = last - first + 1; /* number of candidates */
2843 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2844
2845 done = 0;
2846 while (!done) {
2847 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2848 done = 1;
2849 }
2850 if (!done) {
2851 if (--count == 0) {
2852 SCTP_INP_DECR_REF(inp);
2853 SCTP_INP_WUNLOCK(inp);
2854 SCTP_INP_INFO_WUNLOCK();
2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2856 return (EADDRINUSE);
2857 }
2858 if (candidate == last)
2859 candidate = first;
2860 else
2861 candidate = candidate + 1;
2862 }
2863 }
2864 lport = htons(candidate);
2865 }
2866 SCTP_INP_DECR_REF(inp);
2867 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2868 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2869 /*
2870 * this really should not happen. The guy did a non-blocking
2871 * bind and then did a close at the same time.
2872 */
2873 SCTP_INP_WUNLOCK(inp);
2874 SCTP_INP_INFO_WUNLOCK();
2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2876 return (EINVAL);
2877 }
2878 /* ok we look clear to give out this port, so lets setup the binding */
2879 if (bindall) {
2880 /* binding to all addresses, so just set in the proper flags */
2881 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2882 /* set the automatic addr changes from kernel flag */
2883 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2884 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2885 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2886 } else {
2887 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2888 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2889 }
2890 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2891 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2892 } else {
2893 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2894 }
2895 /*
2896 * set the automatic mobility_base from kernel flag (by
2897 * micchie)
2898 */
2899 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2900 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2901 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2902 } else {
2903 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2904 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2905 }
2906 /*
2907 * set the automatic mobility_fasthandoff from kernel flag
2908 * (by micchie)
2909 */
2910 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2911 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2912 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2913 } else {
2914 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2915 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2916 }
2917 } else {
2918 /*
2919 * bind specific, make sure flags is off and add a new
2920 * address structure to the sctp_addr_list inside the ep
2921 * structure.
2922 *
2923 * We will need to allocate one and insert it at the head. The
2924 * socketopt call can just insert new addresses in there as
2925 * well. It will also have to do the embed scope kame hack
2926 * too (before adding).
2927 */
2928 struct sctp_ifa *ifa;
2929 struct sockaddr_storage store_sa;
2930
2931 memset(&store_sa, 0, sizeof(store_sa));
2932 if (addr->sa_family == AF_INET) {
2933 struct sockaddr_in *sin;
2934
2935 sin = (struct sockaddr_in *)&store_sa;
2936 memcpy(sin, addr, sizeof(struct sockaddr_in));
2937 sin->sin_port = 0;
2938 } else if (addr->sa_family == AF_INET6) {
2939 struct sockaddr_in6 *sin6;
2940
2941 sin6 = (struct sockaddr_in6 *)&store_sa;
2942 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2943 sin6->sin6_port = 0;
2944 }
2945 /*
2946 * first find the interface with the bound address need to
2947 * zero out the port to find the address! yuck! can't do
2948 * this earlier since need port for sctp_pcb_findep()
2949 */
2950 if (sctp_ifap != NULL)
2951 ifa = sctp_ifap;
2952 else {
2953 /*
2954 * Note for BSD we hit here always other O/S's will
2955 * pass things in via the sctp_ifap argument
2956 * (Panda).
2957 */
2958 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2959 vrf_id, SCTP_ADDR_NOT_LOCKED);
2960 }
2961 if (ifa == NULL) {
2962 /* Can't find an interface with that address */
2963 SCTP_INP_WUNLOCK(inp);
2964 SCTP_INP_INFO_WUNLOCK();
2965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2966 return (EADDRNOTAVAIL);
2967 }
2968 if (addr->sa_family == AF_INET6) {
2969 /* GAK, more FIXME IFA lock? */
2970 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2971 /* Can't bind a non-existent addr. */
2972 SCTP_INP_WUNLOCK(inp);
2973 SCTP_INP_INFO_WUNLOCK();
2974 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2975 return (EINVAL);
2976 }
2977 }
2978 /* we're not bound all */
2979 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2980 /* allow bindx() to send ASCONF's for binding changes */
2981 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2982 /* clear automatic addr changes from kernel flag */
2983 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2984
2985 /* add this address to the endpoint list */
2986 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2987 if (error != 0) {
2988 SCTP_INP_WUNLOCK(inp);
2989 SCTP_INP_INFO_WUNLOCK();
2990 return (error);
2991 }
2992 inp->laddr_count++;
2993 }
2994 /* find the bucket */
2995 if (port_reuse_active) {
2996 /* Put it into tcp 1-2-1 hash */
2997 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2998 SCTP_BASE_INFO(hashtcpmark))];
2999 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3000 } else {
3001 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
3002 SCTP_BASE_INFO(hashmark))];
3003 }
3004 /* put it in the bucket */
3005 LIST_INSERT_HEAD(head, inp, sctp_hash);
3006 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3007 head, ntohs(lport), port_reuse_active);
3008 /* set in the port */
3009 inp->sctp_lport = lport;
3010
3011 /* turn off just the unbound flag */
3012 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3013 SCTP_INP_WUNLOCK(inp);
3014 SCTP_INP_INFO_WUNLOCK();
3015 return (0);
3016}
3017
3018
3019static void
3020sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
3021{
3022 struct sctp_iterator *it;
3023
3024 /*
3025 * We enter with the only the ITERATOR_LOCK in place and a write
3026 * lock on the inp_info stuff.
3027 */
3028
3029 /*
3030 * Go through all iterators, we must do this since it is possible
3031 * that some iterator does NOT have the lock, but is waiting for it.
3032 * And the one that had the lock has either moved in the last
3033 * iteration or we just cleared it above. We need to find all of
3034 * those guys. The list of iterators should never be very big
3035 * though.
3036 */
3037 TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) {
3038 if (it == inp->inp_starting_point_for_iterator)
3039 /* skip this guy, he's special */
3040 continue;
3041 if (it->inp == inp) {
3042 /*
3043 * This is tricky and we DON'T lock the iterator.
3044 * Reason is he's running but waiting for me since
3045 * inp->inp_starting_point_for_iterator has the lock
3046 * on me (the guy above we skipped). This tells us
3047 * its is not running but waiting for
3048 * inp->inp_starting_point_for_iterator to be
3049 * released by the guy that does have our INP in a
3050 * lock.
3051 */
3052 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3053 it->inp = NULL;
3054 it->stcb = NULL;
3055 } else {
3056 /* set him up to do the next guy not me */
3057 it->inp = inp_next;
3058 it->stcb = NULL;
3059 }
3060 }
3061 }
3062 it = inp->inp_starting_point_for_iterator;
3063 if (it) {
3064 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3065 it->inp = NULL;
3066 } else {
3067 it->inp = inp_next;
3068 }
3069 it->stcb = NULL;
3070 }
3071}
3072
3073/* release sctp_inpcb unbind the port */
3074void
3075sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3076{
3077 /*
3078 * Here we free a endpoint. We must find it (if it is in the Hash
3079 * table) and remove it from there. Then we must also find it in the
3080 * overall list and remove it from there. After all removals are
3081 * complete then any timer has to be stopped. Then start the actual
3082 * freeing. a) Any local lists. b) Any associations. c) The hash of
3083 * all associations. d) finally the ep itself.
3084 */
3085 struct sctp_pcb *m;
3086 struct sctp_inpcb *inp_save;
3087 struct sctp_tcb *asoc, *nasoc;
3088 struct sctp_laddr *laddr, *nladdr;
3089 struct inpcb *ip_pcb;
3090 struct socket *so;
3091
3092 struct sctp_queued_to_read *sq;
3093
3094
3095 int cnt;
3096 sctp_sharedkey_t *shared_key;
3097
3098
3099#ifdef SCTP_LOG_CLOSING
3100 sctp_log_closing(inp, NULL, 0);
3101#endif
3102 SCTP_ITERATOR_LOCK();
3103 so = inp->sctp_socket;
3104 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3105 /* been here before.. eeks.. get out of here */
3106 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3107 SCTP_ITERATOR_UNLOCK();
3108#ifdef SCTP_LOG_CLOSING
3109 sctp_log_closing(inp, NULL, 1);
3110#endif
3111 return;
3112 }
3113 SCTP_ASOC_CREATE_LOCK(inp);
3114 SCTP_INP_INFO_WLOCK();
3115
3116 SCTP_INP_WLOCK(inp);
3117 /* First time through we have the socket lock, after that no more. */
3118 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3119 /*
3120 * Once we are in we can remove the flag from = 1 is only
3121 * passed from the actual closing routines that are called
3122 * via the sockets layer.
3123 */
3124 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3125 /* socket is gone, so no more wakeups allowed */
3126 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3127 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3128 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3129 }
3130 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3131 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3132
3133 if (inp->control) {
3134 sctp_m_freem(inp->control);
3135 inp->control = NULL;
3136 }
3137 if (inp->pkt) {
3138 sctp_m_freem(inp->pkt);
3139 inp->pkt = NULL;
3140 }
3141 m = &inp->sctp_ep;
3142 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3143 * here but I will be nice :> (i.e.
3144 * ip_pcb = ep;) */
3145 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3146 int cnt_in_sd;
3147
3148 cnt_in_sd = 0;
3149 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3150 asoc = nasoc) {
3151 SCTP_TCB_LOCK(asoc);
3152 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3153 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3154 /* Skip guys being freed */
3155 /* asoc->sctp_socket = NULL; FIXME MT */
3156 cnt_in_sd++;
3157 SCTP_TCB_UNLOCK(asoc);
3158 continue;
3159 }
3160 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3161 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3162 (asoc->asoc.total_output_queue_size == 0)) {
3163 /*
3164 * If we have data in queue, we don't want
3165 * to just free since the app may have done,
3166 * send()/close or connect/send/close. And
3167 * it wants the data to get across first.
3168 */
3169 /* Just abandon things in the front states */
3170 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3171 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3172 cnt_in_sd++;
3173 }
3174 continue;
3175 }
3176 /* Disconnect the socket please */
3177 asoc->sctp_socket = NULL;
3178 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3179 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3180 (asoc->asoc.control_pdapi) ||
3181 (asoc->asoc.size_on_all_streams > 0) ||
3182 (so && (so->so_rcv.sb_cc > 0))
3183 ) {
3184 /* Left with Data unread */
3185 struct mbuf *op_err;
3186
3187 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3188 0, M_DONTWAIT, 1, MT_DATA);
3189 if (op_err) {
3190 /* Fill in the user initiated abort */
3191 struct sctp_paramhdr *ph;
3192 uint32_t *ippp;
3193
3194 SCTP_BUF_LEN(op_err) =
3195 sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3196 ph = mtod(op_err,
3197 struct sctp_paramhdr *);
3198 ph->param_type = htons(
3199 SCTP_CAUSE_USER_INITIATED_ABT);
3200 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3201 ippp = (uint32_t *) (ph + 1);
3202 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3203 }
3204 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3205#if defined(SCTP_PANIC_ON_ABORT)
3206 panic("inpcb_free does an abort");
3207#endif
3208 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3209 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3210 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3211 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3212 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3213 }
3214 if (sctp_free_assoc(inp, asoc,
3215 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3216 cnt_in_sd++;
3217 }
3218 continue;
3219 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3220 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3221 (asoc->asoc.stream_queue_cnt == 0)
3222 ) {
3223 if (asoc->asoc.locked_on_sending) {
3224 goto abort_anyway;
3225 }
3226 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3227 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3228 /*
3229 * there is nothing queued to send,
3230 * so I send shutdown
3231 */
3232 sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3233 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3234 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3235 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3236 }
3237 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3238 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3239 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3240 asoc->asoc.primary_destination);
3241 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3242 asoc->asoc.primary_destination);
3243 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3244 }
3245 } else {
3246 /* mark into shutdown pending */
3247 struct sctp_stream_queue_pending *sp;
3248
3249 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3250 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3251 asoc->asoc.primary_destination);
3252 if (asoc->asoc.locked_on_sending) {
3253 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3254 sctp_streamhead);
3255 if (sp == NULL) {
3256 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3257 asoc->asoc.locked_on_sending,
3258 asoc->asoc.locked_on_sending->stream_no);
3259 } else {
3260 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3261 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3262 }
3263 }
3264 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3265 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3266 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3267 struct mbuf *op_err;
3268
3269 abort_anyway:
3270 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3271 0, M_DONTWAIT, 1, MT_DATA);
3272 if (op_err) {
3273 /*
3274 * Fill in the user
3275 * initiated abort
3276 */
3277 struct sctp_paramhdr *ph;
3278 uint32_t *ippp;
3279
3280 SCTP_BUF_LEN(op_err) =
3281 (sizeof(struct sctp_paramhdr) +
3282 sizeof(uint32_t));
3283 ph = mtod(op_err,
3284 struct sctp_paramhdr *);
3285 ph->param_type = htons(
3286 SCTP_CAUSE_USER_INITIATED_ABT);
3287 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3288 ippp = (uint32_t *) (ph + 1);
3289 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3290 }
3291 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3292#if defined(SCTP_PANIC_ON_ABORT)
3293 panic("inpcb_free does an abort");
3294#endif
3295
3296 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3297 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3298 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3299 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3300 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3301 }
3302 if (sctp_free_assoc(inp, asoc,
3303 SCTP_PCBFREE_NOFORCE,
3304 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3305 cnt_in_sd++;
3306 }
3307 continue;
3308 } else {
3309 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3310 }
3311 }
3312 cnt_in_sd++;
3313 SCTP_TCB_UNLOCK(asoc);
3314 }
3315 /* now is there some left in our SHUTDOWN state? */
3316 if (cnt_in_sd) {
3317 SCTP_INP_WUNLOCK(inp);
3318 SCTP_ASOC_CREATE_UNLOCK(inp);
3319 SCTP_INP_INFO_WUNLOCK();
3320 SCTP_ITERATOR_UNLOCK();
3321#ifdef SCTP_LOG_CLOSING
3322 sctp_log_closing(inp, NULL, 2);
3323#endif
3324 inp->sctp_socket = NULL;
3325 return;
3326 }
3327 }
3328 inp->sctp_socket = NULL;
3329 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3330 SCTP_PCB_FLAGS_UNBOUND) {
3331 /*
3332 * ok, this guy has been bound. It's port is somewhere in
3333 * the SCTP_BASE_INFO(hash table). Remove it!
3334 */
3335 LIST_REMOVE(inp, sctp_hash);
3336 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3337 }
3338 /*
3339 * If there is a timer running to kill us, forget it, since it may
3340 * have a contest on the INP lock.. which would cause us to die ...
3341 */
3342 cnt = 0;
3343 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3344 asoc = nasoc) {
3345 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3346 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3347 cnt++;
3348 continue;
3349 }
3350 /* Free associations that are NOT killing us */
3351 SCTP_TCB_LOCK(asoc);
3352 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3353 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3354 struct mbuf *op_err;
3355 uint32_t *ippp;
3356
3357 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3358 0, M_DONTWAIT, 1, MT_DATA);
3359 if (op_err) {
3360 /* Fill in the user initiated abort */
3361 struct sctp_paramhdr *ph;
3362
3363 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3364 sizeof(uint32_t));
3365 ph = mtod(op_err, struct sctp_paramhdr *);
3366 ph->param_type = htons(
3367 SCTP_CAUSE_USER_INITIATED_ABT);
3368 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3369 ippp = (uint32_t *) (ph + 1);
3370 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3371
3372 }
3373 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3374#if defined(SCTP_PANIC_ON_ABORT)
3375 panic("inpcb_free does an abort");
3376#endif
3377 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3378 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3379 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3380 cnt++;
3381 SCTP_TCB_UNLOCK(asoc);
3382 continue;
3383 }
3384 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3385 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3386 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3387 }
3388 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3389 cnt++;
3390 }
3391 }
3392 if (cnt) {
3393 /* Ok we have someone out there that will kill us */
3394 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3395 SCTP_INP_WUNLOCK(inp);
3396 SCTP_ASOC_CREATE_UNLOCK(inp);
3397 SCTP_INP_INFO_WUNLOCK();
3398 SCTP_ITERATOR_UNLOCK();
3399#ifdef SCTP_LOG_CLOSING
3400 sctp_log_closing(inp, NULL, 3);
3401#endif
3402 return;
3403 }
3404 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3405 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3406 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3407 SCTP_INP_WUNLOCK(inp);
3408 SCTP_ASOC_CREATE_UNLOCK(inp);
3409 SCTP_INP_INFO_WUNLOCK();
3410 SCTP_ITERATOR_UNLOCK();
3411#ifdef SCTP_LOG_CLOSING
3412 sctp_log_closing(inp, NULL, 4);
3413#endif
3414 return;
3415 }
3416 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3417 inp->sctp_ep.signature_change.type = 0;
3418 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3419
3420#ifdef SCTP_LOG_CLOSING
3421 sctp_log_closing(inp, NULL, 5);
3422#endif
3423
3424 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3425 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3426 /* Clear the read queue */
3427 if ((inp->sctp_asocidhash) != NULL) {
3428 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3429 inp->sctp_asocidhash = NULL;
3430 }
3431 /* sa_ignore FREED_MEMORY */
3432 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3433 /* Its only abandoned if it had data left */
3434 if (sq->length)
3435 SCTP_STAT_INCR(sctps_left_abandon);
3436
3437 TAILQ_REMOVE(&inp->read_queue, sq, next);
3438 sctp_free_remote_addr(sq->whoFrom);
3439 if (so)
3440 so->so_rcv.sb_cc -= sq->length;
3441 if (sq->data) {
3442 sctp_m_freem(sq->data);
3443 sq->data = NULL;
3444 }
3445 /*
3446 * no need to free the net count, since at this point all
3447 * assoc's are gone.
3448 */
3449 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3450 SCTP_DECR_READQ_COUNT();
3451 }
3452 /* Now the sctp_pcb things */
3453 /*
3454 * free each asoc if it is not already closed/free. we can't use the
3455 * macro here since le_next will get freed as part of the
3456 * sctp_free_assoc() call.
3457 */
3458 cnt = 0;
3459 if (so) {
3460#ifdef IPSEC
3461 ipsec_delete_pcbpolicy(ip_pcb);
3462#endif /* IPSEC */
3463
3464 /* Unlocks not needed since the socket is gone now */
3465 }
3466 if (ip_pcb->inp_options) {
3467 (void)sctp_m_free(ip_pcb->inp_options);
3468 ip_pcb->inp_options = 0;
3469 }
3470 if (ip_pcb->inp_moptions) {
3471 inp_freemoptions(ip_pcb->inp_moptions);
3472 ip_pcb->inp_moptions = 0;
3473 }
3474#ifdef INET6
3475 if (ip_pcb->inp_vflag & INP_IPV6) {
3476 struct in6pcb *in6p;
3477
3478 in6p = (struct in6pcb *)inp;
3479 ip6_freepcbopts(in6p->in6p_outputopts);
3480 }
3481#endif /* INET6 */
3482 ip_pcb->inp_vflag = 0;
3483 /* free up authentication fields */
3484 if (inp->sctp_ep.local_auth_chunks != NULL)
3485 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3486 if (inp->sctp_ep.local_hmacs != NULL)
3487 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3488
3489 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3490 while (shared_key) {
3491 LIST_REMOVE(shared_key, next);
3492 sctp_free_sharedkey(shared_key);
3493 /* sa_ignore FREED_MEMORY */
3494 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3495 }
3496
3497 inp_save = LIST_NEXT(inp, sctp_list);
3498 LIST_REMOVE(inp, sctp_list);
3499
3500 /* fix any iterators only after out of the list */
3501 sctp_iterator_inp_being_freed(inp, inp_save);
3502 /*
3503 * if we have an address list the following will free the list of
3504 * ifaddr's that are set into this ep. Again macro limitations here,
3505 * since the LIST_FOREACH could be a bad idea.
3506 */
3507 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3508 laddr = nladdr) {
3509 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3510 sctp_remove_laddr(laddr);
3511 }
3512
3513#ifdef SCTP_TRACK_FREED_ASOCS
3514 /* TEMP CODE */
3515 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3516 asoc = nasoc) {
3517 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3518 LIST_REMOVE(asoc, sctp_tcblist);
3519 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3520 SCTP_DECR_ASOC_COUNT();
3521 }
3522 /* *** END TEMP CODE *** */
3523#endif
3524 /* Now lets see about freeing the EP hash table. */
3525 if (inp->sctp_tcbhash != NULL) {
3526 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3527 inp->sctp_tcbhash = NULL;
3528 }
3529 /* Now we must put the ep memory back into the zone pool */
3530 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3531 SCTP_INP_LOCK_DESTROY(inp);
3532 SCTP_INP_READ_DESTROY(inp);
3533 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3534 SCTP_INP_INFO_WUNLOCK();
3535 SCTP_ITERATOR_UNLOCK();
3536 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3537 SCTP_DECR_EP_COUNT();
3538}
3539
3540
3541struct sctp_nets *
3542sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3543{
3544 struct sctp_nets *net;
3545
3546 /* locate the address */
3547 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3548 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3549 return (net);
3550 }
3551 return (NULL);
3552}
3553
3554
3555int
3556sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3557{
3558 struct sctp_ifa *sctp_ifa;
3559
3560 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3561 if (sctp_ifa) {
3562 return (1);
3563 } else {
3564 return (0);
3565 }
3566}
3567
3568/*
3569 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3570 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3571 * stats of stuff.
3572 */
3573int
3574sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3575 int set_scope, int from)
3576{
3577 /*
3578 * The following is redundant to the same lines in the
3579 * sctp_aloc_assoc() but is needed since other's call the add
3580 * address function
3581 */
3582 struct sctp_nets *net, *netfirst;
3583 int addr_inscope;
3584
3585 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3586 from);
3587 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3588
3589 netfirst = sctp_findnet(stcb, newaddr);
3590 if (netfirst) {
3591 /*
3592 * Lie and return ok, we don't want to make the association
3593 * go away for this behavior. It will happen in the TCP
3594 * model in a connected socket. It does not reach the hash
3595 * table until after the association is built so it can't be
3596 * found. Mark as reachable, since the initial creation will
3597 * have been cleared and the NOT_IN_ASSOC flag will have
3598 * been added... and we don't want to end up removing it
3599 * back out.
3600 */
3601 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3602 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3603 SCTP_ADDR_UNCONFIRMED);
3604 } else {
3605 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3606 }
3607
3608 return (0);
3609 }
3610 addr_inscope = 1;
3611 if (newaddr->sa_family == AF_INET) {
3612 struct sockaddr_in *sin;
3613
3614 sin = (struct sockaddr_in *)newaddr;
3615 if (sin->sin_addr.s_addr == 0) {
3616 /* Invalid address */
3617 return (-1);
3618 }
3619 /* zero out the bzero area */
3620 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3621
3622 /* assure len is set */
3623 sin->sin_len = sizeof(struct sockaddr_in);
3624 if (set_scope) {
3625#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3626 stcb->ipv4_local_scope = 1;
3627#else
3628 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3629 stcb->asoc.ipv4_local_scope = 1;
3630 }
3631#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3632 } else {
3633 /* Validate the address is in scope */
3634 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3635 (stcb->asoc.ipv4_local_scope == 0)) {
3636 addr_inscope = 0;
3637 }
3638 }
3639#ifdef INET6
3640 } else if (newaddr->sa_family == AF_INET6) {
3641 struct sockaddr_in6 *sin6;
3642
3643 sin6 = (struct sockaddr_in6 *)newaddr;
3644 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3645 /* Invalid address */
3646 return (-1);
3647 }
3648 /* assure len is set */
3649 sin6->sin6_len = sizeof(struct sockaddr_in6);
3650 if (set_scope) {
3651 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3652 stcb->asoc.loopback_scope = 1;
3653 stcb->asoc.local_scope = 0;
3654 stcb->asoc.ipv4_local_scope = 1;
3655 stcb->asoc.site_scope = 1;
3656 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3657 /*
3658 * If the new destination is a LINK_LOCAL we
3659 * must have common site scope. Don't set
3660 * the local scope since we may not share
3661 * all links, only loopback can do this.
3662 * Links on the local network would also be
3663 * on our private network for v4 too.
3664 */
3665 stcb->asoc.ipv4_local_scope = 1;
3666 stcb->asoc.site_scope = 1;
3667 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3668 /*
3669 * If the new destination is SITE_LOCAL then
3670 * we must have site scope in common.
3671 */
3672 stcb->asoc.site_scope = 1;
3673 }
3674 } else {
3675 /* Validate the address is in scope */
3676 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3677 (stcb->asoc.loopback_scope == 0)) {
3678 addr_inscope = 0;
3679 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3680 (stcb->asoc.local_scope == 0)) {
3681 addr_inscope = 0;
3682 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3683 (stcb->asoc.site_scope == 0)) {
3684 addr_inscope = 0;
3685 }
3686 }
3687#endif
3688 } else {
3689 /* not supported family type */
3690 return (-1);
3691 }
3692 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3693 if (net == NULL) {
3694 return (-1);
3695 }
3696 SCTP_INCR_RADDR_COUNT();
3697 bzero(net, sizeof(*net));
3698 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3699 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3700 if (newaddr->sa_family == AF_INET) {
3701 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3702 } else if (newaddr->sa_family == AF_INET6) {
3703 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3704 }
3705 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3706 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3707 stcb->asoc.loopback_scope = 1;
3708 stcb->asoc.ipv4_local_scope = 1;
3709 stcb->asoc.local_scope = 0;
3710 stcb->asoc.site_scope = 1;
3711 addr_inscope = 1;
3712 }
3713 net->failure_threshold = stcb->asoc.def_net_failure;
3714 if (addr_inscope == 0) {
3715 net->dest_state = (SCTP_ADDR_REACHABLE |
3716 SCTP_ADDR_OUT_OF_SCOPE);
3717 } else {
3718 if (from == SCTP_ADDR_IS_CONFIRMED)
3719 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3720 net->dest_state = SCTP_ADDR_REACHABLE;
3721 else
3722 net->dest_state = SCTP_ADDR_REACHABLE |
3723 SCTP_ADDR_UNCONFIRMED;
3724 }
3725 /*
3726 * We set this to 0, the timer code knows that this means its an
3727 * initial value
3728 */
3729 net->RTO = 0;
3730 net->RTO_measured = 0;
3731 stcb->asoc.numnets++;
3732 *(&net->ref_count) = 1;
3733 net->tos_flowlabel = 0;
3734 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3735 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3736 } else {
3737 net->port = 0;
3738 }
3739#ifdef INET
3740 if (newaddr->sa_family == AF_INET)
3741 net->tos_flowlabel = stcb->asoc.default_tos;
3742#endif
3743#ifdef INET6
3744 if (newaddr->sa_family == AF_INET6)
3745 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3746#endif
3747 /* Init the timer structure */
3748 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3749 SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3750 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3751
3752 /* Now generate a route for this guy */
3753#ifdef INET6
3754 /* KAME hack: embed scopeid */
3755 if (newaddr->sa_family == AF_INET6) {
3756 struct sockaddr_in6 *sin6;
3757
3758 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
3759 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
| 3759 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
|
3760 sin6->sin6_scope_id = 0;
3761 }
3762#endif
3763 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3764
3765 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3766 /* Get source address */
3767 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3768 stcb,
3769 (sctp_route_t *) & net->ro,
3770 net,
3771 0,
3772 stcb->asoc.vrf_id);
3773 /* Now get the interface MTU */
3774 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3775 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3776 } else {
3777 net->mtu = 0;
3778 }
3779#ifdef SCTP_PRINT_FOR_B_AND_M
3780 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3781#endif
3782 if (net->mtu == 0) {
3783 /* Huh ?? */
3784 net->mtu = SCTP_DEFAULT_MTU;
3785 } else {
3786 uint32_t rmtu;
3787
3788 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3789#ifdef SCTP_PRINT_FOR_B_AND_M
3790 SCTP_PRINTF("The route mtu is %d\n", rmtu);
3791#endif
3792 if (rmtu == 0) {
3793 /*
3794 * Start things off to match mtu of
3795 * interface please.
3796 */
3797 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3798 net->ro.ro_rt, net->mtu);
3799 } else {
3800 /*
3801 * we take the route mtu over the interface,
3802 * since the route may be leading out the
3803 * loopback, or a different interface.
3804 */
3805 net->mtu = rmtu;
3806 }
3807 }
3808 if (from == SCTP_ALLOC_ASOC) {
3809#ifdef SCTP_PRINT_FOR_B_AND_M
3810 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3811#endif
3812 stcb->asoc.smallest_mtu = net->mtu;
3813 }
3814 } else {
3815 net->mtu = stcb->asoc.smallest_mtu;
3816 }
3817#ifdef INET6
3818 if (newaddr->sa_family == AF_INET6) {
3819 struct sockaddr_in6 *sin6;
3820
3821 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3822 (void)sa6_recoverscope(sin6);
3823 }
3824#endif
3825 if (net->port) {
3826 net->mtu -= sizeof(struct udphdr);
3827 }
3828 if (stcb->asoc.smallest_mtu > net->mtu) {
3829#ifdef SCTP_PRINT_FOR_B_AND_M
3830 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3831 net->mtu, stcb->asoc.smallest_mtu);
3832#endif
3833 stcb->asoc.smallest_mtu = net->mtu;
3834 }
3835 /* JRS - Use the congestion control given in the CC module */
3836 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3837
3838 /*
3839 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3840 * of assoc (2005/06/27, iyengar@cis.udel.edu)
3841 */
3842 net->find_pseudo_cumack = 1;
3843 net->find_rtx_pseudo_cumack = 1;
3844 net->src_addr_selected = 0;
3845 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3846 if (net->ro.ro_rt == NULL) {
3847 /* Since we have no route put it at the back */
3848 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3849 } else if (netfirst == NULL) {
3850 /* We are the first one in the pool. */
3851 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3852 } else if (netfirst->ro.ro_rt == NULL) {
3853 /*
3854 * First one has NO route. Place this one ahead of the first
3855 * one.
3856 */
3857 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3858 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3859 /*
3860 * This one has a different interface than the one at the
3861 * top of the list. Place it ahead.
3862 */
3863 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3864 } else {
3865 /*
3866 * Ok we have the same interface as the first one. Move
3867 * forward until we find either a) one with a NULL route...
3868 * insert ahead of that b) one with a different ifp.. insert
3869 * after that. c) end of the list.. insert at the tail.
3870 */
3871 struct sctp_nets *netlook;
3872
3873 do {
3874 netlook = TAILQ_NEXT(netfirst, sctp_next);
3875 if (netlook == NULL) {
3876 /* End of the list */
3877 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3878 break;
3879 } else if (netlook->ro.ro_rt == NULL) {
3880 /* next one has NO route */
3881 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3882 break;
3883 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3884 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3885 net, sctp_next);
3886 break;
3887 }
3888 /* Shift forward */
3889 netfirst = netlook;
3890 } while (netlook != NULL);
3891 }
3892
3893 /* got to have a primary set */
3894 if (stcb->asoc.primary_destination == 0) {
3895 stcb->asoc.primary_destination = net;
3896 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3897 (net->ro.ro_rt) &&
3898 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3899 /* No route to current primary adopt new primary */
3900 stcb->asoc.primary_destination = net;
3901 }
3902 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3903 net);
3904 /* Validate primary is first */
3905 net = TAILQ_FIRST(&stcb->asoc.nets);
3906 if ((net != stcb->asoc.primary_destination) &&
3907 (stcb->asoc.primary_destination)) {
3908 /*
3909 * first one on the list is NOT the primary sctp_cmpaddr()
3910 * is much more efficent if the primary is the first on the
3911 * list, make it so.
3912 */
3913 TAILQ_REMOVE(&stcb->asoc.nets,
3914 stcb->asoc.primary_destination, sctp_next);
3915 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3916 stcb->asoc.primary_destination, sctp_next);
3917 }
3918 return (0);
3919}
3920
3921
3922static uint32_t
3923sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3924{
3925 uint32_t id;
3926 struct sctpasochead *head;
3927 struct sctp_tcb *lstcb;
3928
3929 SCTP_INP_WLOCK(inp);
3930try_again:
3931 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3932 /* TSNH */
3933 SCTP_INP_WUNLOCK(inp);
3934 return (0);
3935 }
3936 /*
3937 * We don't allow assoc id to be 0, this is needed otherwise if the
3938 * id were to wrap we would have issues with some socket options.
3939 */
3940 if (inp->sctp_associd_counter == 0) {
3941 inp->sctp_associd_counter++;
3942 }
3943 id = inp->sctp_associd_counter;
3944 inp->sctp_associd_counter++;
3945 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
3946 if (lstcb) {
3947 goto try_again;
3948 }
3949 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
3950 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
3951 stcb->asoc.in_asocid_hash = 1;
3952 SCTP_INP_WUNLOCK(inp);
3953 return id;
3954}
3955
3956/*
3957 * allocate an association and add it to the endpoint. The caller must be
3958 * careful to add all additional addresses once they are know right away or
3959 * else the assoc will be may experience a blackout scenario.
3960 */
3961struct sctp_tcb *
3962sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3963 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3964 struct thread *p
3965)
3966{
3967 /* note the p argument is only valid in unbound sockets */
3968
3969 struct sctp_tcb *stcb;
3970 struct sctp_association *asoc;
3971 struct sctpasochead *head;
3972 uint16_t rport;
3973 int err;
3974
3975 /*
3976 * Assumption made here: Caller has done a
3977 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3978 * address does not exist already.
3979 */
3980 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
3981 /* Hit max assoc, sorry no more */
3982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3983 *error = ENOBUFS;
3984 return (NULL);
3985 }
3986 if (firstaddr == NULL) {
3987 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3988 *error = EINVAL;
3989 return (NULL);
3990 }
3991 SCTP_INP_RLOCK(inp);
3992 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
3993 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
3994 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
3995 /*
3996 * If its in the TCP pool, its NOT allowed to create an
3997 * association. The parent listener needs to call
3998 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3999 * off, or connected one does this.. its an error.
4000 */
4001 SCTP_INP_RUNLOCK(inp);
4002 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4003 *error = EINVAL;
4004 return (NULL);
4005 }
4006 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4007#ifdef SCTP_DEBUG
4008 if (firstaddr) {
4009 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4010 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4011 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4012 } else {
4013 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4014 }
4015#endif /* SCTP_DEBUG */
4016 if (firstaddr->sa_family == AF_INET) {
4017 struct sockaddr_in *sin;
4018
4019 sin = (struct sockaddr_in *)firstaddr;
4020 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4021 /* Invalid address */
4022 SCTP_INP_RUNLOCK(inp);
4023 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4024 *error = EINVAL;
4025 return (NULL);
4026 }
4027 rport = sin->sin_port;
4028 } else if (firstaddr->sa_family == AF_INET6) {
4029 struct sockaddr_in6 *sin6;
4030
4031 sin6 = (struct sockaddr_in6 *)firstaddr;
4032 if ((sin6->sin6_port == 0) ||
4033 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4034 /* Invalid address */
4035 SCTP_INP_RUNLOCK(inp);
4036 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4037 *error = EINVAL;
4038 return (NULL);
4039 }
4040 rport = sin6->sin6_port;
4041 } else {
4042 /* not supported family type */
4043 SCTP_INP_RUNLOCK(inp);
4044 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4045 *error = EINVAL;
4046 return (NULL);
4047 }
4048 SCTP_INP_RUNLOCK(inp);
4049 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4050 /*
4051 * If you have not performed a bind, then we need to do the
4052 * ephemerial bind for you.
4053 */
4054 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4055 (struct sockaddr *)NULL,
4056 (struct sctp_ifa *)NULL,
4057 p
4058 ))) {
4059 /* bind error, probably perm */
4060 *error = err;
4061 return (NULL);
4062 }
4063 }
4064 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4065 if (stcb == NULL) {
4066 /* out of memory? */
4067 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4068 *error = ENOMEM;
4069 return (NULL);
4070 }
4071 SCTP_INCR_ASOC_COUNT();
4072
4073 bzero(stcb, sizeof(*stcb));
4074 asoc = &stcb->asoc;
4075
4076 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4077 SCTP_TCB_LOCK_INIT(stcb);
4078 SCTP_TCB_SEND_LOCK_INIT(stcb);
4079 stcb->rport = rport;
4080 /* setup back pointer's */
4081 stcb->sctp_ep = inp;
4082 stcb->sctp_socket = inp->sctp_socket;
4083 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
4084 /* failed */
4085 SCTP_TCB_LOCK_DESTROY(stcb);
4086 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4087 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4088 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4089 SCTP_DECR_ASOC_COUNT();
4090 *error = err;
4091 return (NULL);
4092 }
4093 /* and the port */
4094 SCTP_INP_INFO_WLOCK();
4095 SCTP_INP_WLOCK(inp);
4096 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4097 /* inpcb freed while alloc going on */
4098 SCTP_TCB_LOCK_DESTROY(stcb);
4099 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4100 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4101 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4102 SCTP_INP_WUNLOCK(inp);
4103 SCTP_INP_INFO_WUNLOCK();
4104 SCTP_DECR_ASOC_COUNT();
4105 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4106 *error = EINVAL;
4107 return (NULL);
4108 }
4109 SCTP_TCB_LOCK(stcb);
4110
4111 /* now that my_vtag is set, add it to the hash */
4112 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4113 /* put it in the bucket in the vtag hash of assoc's for the system */
4114 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4115 SCTP_INP_INFO_WUNLOCK();
4116
4117 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4118 /* failure.. memory error? */
4119 if (asoc->strmout) {
4120 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4121 asoc->strmout = NULL;
4122 }
4123 if (asoc->mapping_array) {
4124 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4125 asoc->mapping_array = NULL;
4126 }
4127 if (asoc->nr_mapping_array) {
4128 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4129 asoc->nr_mapping_array = NULL;
4130 }
4131 SCTP_DECR_ASOC_COUNT();
4132 SCTP_TCB_LOCK_DESTROY(stcb);
4133 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4134 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4135 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4136 SCTP_INP_WUNLOCK(inp);
4137 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4138 *error = ENOBUFS;
4139 return (NULL);
4140 }
4141 /* Init all the timers */
4142 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4143 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4144 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4145 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4146 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4147 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4148 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4149 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4150
4151 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4152 /* now file the port under the hash as well */
4153 if (inp->sctp_tcbhash != NULL) {
4154 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4155 inp->sctp_hashmark)];
4156 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4157 }
4158 SCTP_INP_WUNLOCK(inp);
4159 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4160 return (stcb);
4161}
4162
4163
4164void
4165sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4166{
4167 struct sctp_association *asoc;
4168
4169 asoc = &stcb->asoc;
4170 asoc->numnets--;
4171 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4172 if (net == asoc->primary_destination) {
4173 /* Reset primary */
4174 struct sctp_nets *lnet;
4175
4176 lnet = TAILQ_FIRST(&asoc->nets);
4177 /*
4178 * Mobility adaptation Ideally, if deleted destination is
4179 * the primary, it becomes a fast retransmission trigger by
4180 * the subsequent SET PRIMARY. (by micchie)
4181 */
4182 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4183 SCTP_MOBILITY_BASE) ||
4184 sctp_is_mobility_feature_on(stcb->sctp_ep,
4185 SCTP_MOBILITY_FASTHANDOFF)) {
4186 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4187 if (asoc->deleted_primary != NULL) {
4188 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4189 goto out;
4190 }
4191 asoc->deleted_primary = net;
4192 atomic_add_int(&net->ref_count, 1);
4193 memset(&net->lastsa, 0, sizeof(net->lastsa));
4194 memset(&net->lastsv, 0, sizeof(net->lastsv));
4195 sctp_mobility_feature_on(stcb->sctp_ep,
4196 SCTP_MOBILITY_PRIM_DELETED);
4197 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4198 stcb->sctp_ep, stcb, NULL);
4199 }
4200out:
4201 /* Try to find a confirmed primary */
4202 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4203 }
4204 if (net == asoc->last_data_chunk_from) {
4205 /* Reset primary */
4206 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4207 }
4208 if (net == asoc->last_control_chunk_from) {
4209 /* Clear net */
4210 asoc->last_control_chunk_from = NULL;
4211 }
4212 sctp_free_remote_addr(net);
4213}
4214
4215/*
4216 * remove a remote endpoint address from an association, it will fail if the
4217 * address does not exist.
4218 */
4219int
4220sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4221{
4222 /*
4223 * Here we need to remove a remote address. This is quite simple, we
4224 * first find it in the list of address for the association
4225 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4226 * on that item. Note we do not allow it to be removed if there are
4227 * no other addresses.
4228 */
4229 struct sctp_association *asoc;
4230 struct sctp_nets *net, *net_tmp;
4231
4232 asoc = &stcb->asoc;
4233
4234 /* locate the address */
4235 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4236 net_tmp = TAILQ_NEXT(net, sctp_next);
4237 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4238 continue;
4239 }
4240 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4241 remaddr)) {
4242 /* we found the guy */
4243 if (asoc->numnets < 2) {
4244 /* Must have at LEAST two remote addresses */
4245 return (-1);
4246 } else {
4247 sctp_remove_net(stcb, net);
4248 return (0);
4249 }
4250 }
4251 }
4252 /* not found. */
4253 return (-2);
4254}
4255
4256void
4257sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4258{
4259 struct sctpvtaghead *chain;
4260 struct sctp_tagblock *twait_block;
4261 int found = 0;
4262 int i;
4263
4264 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4265 if (!SCTP_LIST_EMPTY(chain)) {
4266 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4267 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4268 if ((twait_block->vtag_block[i].v_tag == tag) &&
4269 (twait_block->vtag_block[i].lport == lport) &&
4270 (twait_block->vtag_block[i].rport == rport)) {
4271 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4272 twait_block->vtag_block[i].v_tag = 0;
4273 twait_block->vtag_block[i].lport = 0;
4274 twait_block->vtag_block[i].rport = 0;
4275 found = 1;
4276 break;
4277 }
4278 }
4279 if (found)
4280 break;
4281 }
4282 }
4283}
4284
4285int
4286sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4287{
4288 struct sctpvtaghead *chain;
4289 struct sctp_tagblock *twait_block;
4290 int found = 0;
4291 int i;
4292
4293 SCTP_INP_INFO_WLOCK();
4294 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4295 if (!SCTP_LIST_EMPTY(chain)) {
4296 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4297 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4298 if ((twait_block->vtag_block[i].v_tag == tag) &&
4299 (twait_block->vtag_block[i].lport == lport) &&
4300 (twait_block->vtag_block[i].rport == rport)) {
4301 found = 1;
4302 break;
4303 }
4304 }
4305 if (found)
4306 break;
4307 }
4308 }
4309 SCTP_INP_INFO_WUNLOCK();
4310 return (found);
4311}
4312
4313
4314void
4315sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4316{
4317 struct sctpvtaghead *chain;
4318 struct sctp_tagblock *twait_block;
4319 struct timeval now;
4320 int set, i;
4321
4322 if (time == 0) {
4323 /* Its disabled */
4324 return;
4325 }
4326 (void)SCTP_GETTIME_TIMEVAL(&now);
4327 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4328 set = 0;
4329 if (!SCTP_LIST_EMPTY(chain)) {
4330 /* Block(s) present, lets find space, and expire on the fly */
4331 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4332 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4333 if ((twait_block->vtag_block[i].v_tag == 0) &&
4334 !set) {
4335 twait_block->vtag_block[i].tv_sec_at_expire =
4336 now.tv_sec + time;
4337 twait_block->vtag_block[i].v_tag = tag;
4338 twait_block->vtag_block[i].lport = lport;
4339 twait_block->vtag_block[i].rport = rport;
4340 set = 1;
4341 } else if ((twait_block->vtag_block[i].v_tag) &&
4342 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4343 /* Audit expires this guy */
4344 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4345 twait_block->vtag_block[i].v_tag = 0;
4346 twait_block->vtag_block[i].lport = 0;
4347 twait_block->vtag_block[i].rport = 0;
4348 if (set == 0) {
4349 /* Reuse it for my new tag */
4350 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4351 twait_block->vtag_block[i].v_tag = tag;
4352 twait_block->vtag_block[i].lport = lport;
4353 twait_block->vtag_block[i].rport = rport;
4354 set = 1;
4355 }
4356 }
4357 }
4358 if (set) {
4359 /*
4360 * We only do up to the block where we can
4361 * place our tag for audits
4362 */
4363 break;
4364 }
4365 }
4366 }
4367 /* Need to add a new block to chain */
4368 if (!set) {
4369 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4370 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4371 if (twait_block == NULL) {
4372#ifdef INVARIANTS
4373 panic("Can not alloc tagblock");
4374#endif
4375 return;
4376 }
4377 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4378 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4379 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4380 twait_block->vtag_block[0].v_tag = tag;
4381 twait_block->vtag_block[0].lport = lport;
4382 twait_block->vtag_block[0].rport = rport;
4383 }
4384}
4385
4386
4387static void
4388sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4389{
4390 struct sctp_iterator *it;
4391
4392 /*
4393 * Unlock the tcb lock we do this so we avoid a dead lock scenario
4394 * where the iterator is waiting on the TCB lock and the TCB lock is
4395 * waiting on the iterator lock.
4396 */
4397 it = stcb->asoc.stcb_starting_point_for_iterator;
4398 if (it == NULL) {
4399 return;
4400 }
4401 if (it->inp != stcb->sctp_ep) {
4402 /* hmm, focused on the wrong one? */
4403 return;
4404 }
4405 if (it->stcb != stcb) {
4406 return;
4407 }
4408 it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4409 if (it->stcb == NULL) {
4410 /* done with all asoc's in this assoc */
4411 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4412 it->inp = NULL;
4413 } else {
4414 it->inp = LIST_NEXT(inp, sctp_list);
4415 }
4416 }
4417}
4418
4419
4420/*-
4421 * Free the association after un-hashing the remote port. This
4422 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4423 * expect that the input to this function IS a locked TCB.
4424 * It will return 0, if it did NOT destroy the association (instead
4425 * it unlocks it. It will return NON-zero if it either destroyed the
4426 * association OR the association is already destroyed.
4427 */
4428int
4429sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4430{
4431 int i;
4432 struct sctp_association *asoc;
4433 struct sctp_nets *net, *prev;
4434 struct sctp_laddr *laddr;
4435 struct sctp_tmit_chunk *chk;
4436 struct sctp_asconf_addr *aparam;
4437 struct sctp_asconf_ack *aack;
4438 struct sctp_stream_reset_list *liste;
4439 struct sctp_queued_to_read *sq;
4440 struct sctp_stream_queue_pending *sp;
4441 sctp_sharedkey_t *shared_key;
4442 struct socket *so;
4443 int ccnt = 0;
4444 int cnt = 0;
4445
4446 /* first, lets purge the entry from the hash table. */
4447
4448#ifdef SCTP_LOG_CLOSING
4449 sctp_log_closing(inp, stcb, 6);
4450#endif
4451 if (stcb->asoc.state == 0) {
4452#ifdef SCTP_LOG_CLOSING
4453 sctp_log_closing(inp, NULL, 7);
4454#endif
4455 /* there is no asoc, really TSNH :-0 */
4456 return (1);
4457 }
4458 /* TEMP CODE */
4459 if (stcb->freed_from_where == 0) {
4460 /* Only record the first place free happened from */
4461 stcb->freed_from_where = from_location;
4462 }
4463 /* TEMP CODE */
4464
4465 asoc = &stcb->asoc;
4466 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4467 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4468 /* nothing around */
4469 so = NULL;
4470 else
4471 so = inp->sctp_socket;
4472
4473 /*
4474 * We used timer based freeing if a reader or writer is in the way.
4475 * So we first check if we are actually being called from a timer,
4476 * if so we abort early if a reader or writer is still in the way.
4477 */
4478 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4479 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4480 /*
4481 * is it the timer driving us? if so are the reader/writers
4482 * gone?
4483 */
4484 if (stcb->asoc.refcnt) {
4485 /* nope, reader or writer in the way */
4486 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4487 /* no asoc destroyed */
4488 SCTP_TCB_UNLOCK(stcb);
4489#ifdef SCTP_LOG_CLOSING
4490 sctp_log_closing(inp, stcb, 8);
4491#endif
4492 return (0);
4493 }
4494 }
4495 /* now clean up any other timers */
4496 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4497 asoc->hb_timer.self = NULL;
4498 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4499 asoc->dack_timer.self = NULL;
4500 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4501 /*-
4502 * For stream reset we don't blast this unless
4503 * it is a str-reset timer, it might be the
4504 * free-asoc timer which we DON'T want to
4505 * disturb.
4506 */
4507 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4508 asoc->strreset_timer.self = NULL;
4509 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4510 asoc->asconf_timer.self = NULL;
4511 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4512 asoc->autoclose_timer.self = NULL;
4513 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4514 asoc->shut_guard_timer.self = NULL;
4515 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4516 asoc->delayed_event_timer.self = NULL;
4517 /* Mobility adaptation */
4518 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4519 asoc->delete_prim_timer.self = NULL;
4520 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4521 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4522 net->fr_timer.self = NULL;
4523 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4524 net->rxt_timer.self = NULL;
4525 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4526 net->pmtu_timer.self = NULL;
4527 }
4528 /* Now the read queue needs to be cleaned up (only once) */
4529 cnt = 0;
4530 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4531 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4532 SCTP_INP_READ_LOCK(inp);
4533 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4534 if (sq->stcb == stcb) {
4535 sq->do_not_ref_stcb = 1;
4536 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4537 /*
4538 * If there is no end, there never will be
4539 * now.
4540 */
4541 if (sq->end_added == 0) {
4542 /* Held for PD-API clear that. */
4543 sq->pdapi_aborted = 1;
4544 sq->held_length = 0;
4545 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4546 /*
4547 * Need to add a PD-API
4548 * aborted indication.
4549 * Setting the control_pdapi
4550 * assures that it will be
4551 * added right after this
4552 * msg.
4553 */
4554 uint32_t strseq;
4555
4556 stcb->asoc.control_pdapi = sq;
4557 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4558 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4559 stcb,
4560 SCTP_PARTIAL_DELIVERY_ABORTED,
4561 (void *)&strseq,
4562 SCTP_SO_LOCKED);
4563 stcb->asoc.control_pdapi = NULL;
4564 }
4565 }
4566 /* Add an end to wake them */
4567 sq->end_added = 1;
4568 cnt++;
4569 }
4570 }
4571 SCTP_INP_READ_UNLOCK(inp);
4572 if (stcb->block_entry) {
4573 cnt++;
4574 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4575 stcb->block_entry->error = ECONNRESET;
4576 stcb->block_entry = NULL;
4577 }
4578 }
4579 if (stcb->asoc.refcnt) {
4580 /*
4581 * reader or writer in the way, we have hopefully given him
4582 * something to chew on above.
4583 */
4584 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4585 SCTP_TCB_UNLOCK(stcb);
4586 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4587 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4588 /* nothing around */
4589 so = NULL;
4590 if (so) {
4591 /* Wake any reader/writers */
4592 sctp_sorwakeup(inp, so);
4593 sctp_sowwakeup(inp, so);
4594 }
4595#ifdef SCTP_LOG_CLOSING
4596 sctp_log_closing(inp, stcb, 9);
4597#endif
4598 /* no asoc destroyed */
4599 return (0);
4600 }
4601#ifdef SCTP_LOG_CLOSING
4602 sctp_log_closing(inp, stcb, 10);
4603#endif
4604 /*
4605 * When I reach here, no others want to kill the assoc yet.. and I
4606 * own the lock. Now its possible an abort comes in when I do the
4607 * lock exchange below to grab all the locks to do the final take
4608 * out. to prevent this we increment the count, which will start a
4609 * timer and blow out above thus assuring us that we hold exclusive
4610 * killing of the asoc. Note that after getting back the TCB lock we
4611 * will go ahead and increment the counter back up and stop any
4612 * timer a passing stranger may have started :-S
4613 */
4614 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4615 atomic_add_int(&stcb->asoc.refcnt, 1);
4616
4617 SCTP_TCB_UNLOCK(stcb);
4618
4619 SCTP_ITERATOR_LOCK();
4620 SCTP_INP_INFO_WLOCK();
4621 SCTP_INP_WLOCK(inp);
4622 SCTP_TCB_LOCK(stcb);
4623 }
4624 /* Double check the GONE flag */
4625 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4626 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4627 /* nothing around */
4628 so = NULL;
4629
4630 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4631 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4632 /*
4633 * For TCP type we need special handling when we are
4634 * connected. We also include the peel'ed off ones to.
4635 */
4636 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4637 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4638 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4639 if (so) {
4640 SOCK_LOCK(so);
4641 if (so->so_rcv.sb_cc == 0) {
4642 so->so_state &= ~(SS_ISCONNECTING |
4643 SS_ISDISCONNECTING |
4644 SS_ISCONFIRMING |
4645 SS_ISCONNECTED);
4646 }
4647 SOCK_UNLOCK(so);
4648 socantrcvmore(so);
4649 sctp_sowwakeup(inp, so);
4650 sctp_sorwakeup(inp, so);
4651 SCTP_SOWAKEUP(so);
4652 }
4653 }
4654 }
4655 /*
4656 * Make it invalid too, that way if its about to run it will abort
4657 * and return.
4658 */
4659 sctp_iterator_asoc_being_freed(inp, stcb);
4660 /* re-increment the lock */
4661 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4662 atomic_add_int(&stcb->asoc.refcnt, -1);
4663 }
4664 asoc->state = 0;
4665 if (inp->sctp_tcbhash) {
4666 LIST_REMOVE(stcb, sctp_tcbhash);
4667 }
4668 if (stcb->asoc.in_asocid_hash) {
4669 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4670 }
4671 /* Now lets remove it from the list of ALL associations in the EP */
4672 LIST_REMOVE(stcb, sctp_tcblist);
4673 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4674 SCTP_INP_INCR_REF(inp);
4675 SCTP_INP_WUNLOCK(inp);
4676 SCTP_ITERATOR_UNLOCK();
4677 }
4678 /* pull from vtag hash */
4679 LIST_REMOVE(stcb, sctp_asocs);
4680 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4681 inp->sctp_lport, stcb->rport);
4682
4683 /*
4684 * Now restop the timers to be sure - this is paranoia at is finest!
4685 */
4686 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4687 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4688 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4689 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4690 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4691 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4692 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4693 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4694 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4695 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4696 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4697 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4698 }
4699
4700 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4701 prev = NULL;
4702 /*
4703 * The chunk lists and such SHOULD be empty but we check them just
4704 * in case.
4705 */
4706 /* anything on the wheel needs to be removed */
4707 for (i = 0; i < asoc->streamoutcnt; i++) {
4708 struct sctp_stream_out *outs;
4709
4710 outs = &asoc->strmout[i];
4711 /* now clean up any chunks here */
4712 sp = TAILQ_FIRST(&outs->outqueue);
4713 while (sp) {
4714 TAILQ_REMOVE(&outs->outqueue, sp, next);
4715 if (sp->data) {
4716 sctp_m_freem(sp->data);
4717 sp->data = NULL;
4718 sp->tail_mbuf = NULL;
4719 }
4720 sctp_free_remote_addr(sp->net);
4721 sctp_free_spbufspace(stcb, asoc, sp);
4722 if (sp->holds_key_ref)
4723 sctp_auth_key_release(stcb, sp->auth_keyid);
4724 /* Free the zone stuff */
4725 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4726 SCTP_DECR_STRMOQ_COUNT();
4727 /* sa_ignore FREED_MEMORY */
4728 sp = TAILQ_FIRST(&outs->outqueue);
4729 }
4730 }
4731
4732 /* sa_ignore FREED_MEMORY */
4733 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4734 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4735 SCTP_FREE(liste, SCTP_M_STRESET);
4736 }
4737
4738 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4739 while (sq) {
4740 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4741 if (sq->data) {
4742 sctp_m_freem(sq->data);
4743 sq->data = NULL;
4744 }
4745 sctp_free_remote_addr(sq->whoFrom);
4746 sq->whoFrom = NULL;
4747 sq->stcb = NULL;
4748 /* Free the ctl entry */
4749 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4750 SCTP_DECR_READQ_COUNT();
4751 /* sa_ignore FREED_MEMORY */
4752 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4753 }
4754
4755 chk = TAILQ_FIRST(&asoc->free_chunks);
4756 while (chk) {
4757 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4758 if (chk->data) {
4759 sctp_m_freem(chk->data);
4760 chk->data = NULL;
4761 }
4762 if (chk->holds_key_ref)
4763 sctp_auth_key_release(stcb, chk->auth_keyid);
4764 ccnt++;
4765 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4766 SCTP_DECR_CHK_COUNT();
4767 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4768 asoc->free_chunk_cnt--;
4769 /* sa_ignore FREED_MEMORY */
4770 chk = TAILQ_FIRST(&asoc->free_chunks);
4771 }
4772 /* pending send queue SHOULD be empty */
4773 if (!TAILQ_EMPTY(&asoc->send_queue)) {
4774 chk = TAILQ_FIRST(&asoc->send_queue);
4775 while (chk) {
4776 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4777 if (chk->data) {
4778 sctp_m_freem(chk->data);
4779 chk->data = NULL;
4780 }
4781 if (chk->holds_key_ref)
4782 sctp_auth_key_release(stcb, chk->auth_keyid);
4783 ccnt++;
4784 sctp_free_remote_addr(chk->whoTo);
4785 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4786 SCTP_DECR_CHK_COUNT();
4787 /* sa_ignore FREED_MEMORY */
4788 chk = TAILQ_FIRST(&asoc->send_queue);
4789 }
4790 }
4791/*
4792 if (ccnt) {
4793 printf("Freed %d from send_queue\n", ccnt);
4794 ccnt = 0;
4795 }
4796*/
4797 /* sent queue SHOULD be empty */
4798 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4799 chk = TAILQ_FIRST(&asoc->sent_queue);
4800 while (chk) {
4801 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4802 if (chk->data) {
4803 sctp_m_freem(chk->data);
4804 chk->data = NULL;
4805 }
4806 if (chk->holds_key_ref)
4807 sctp_auth_key_release(stcb, chk->auth_keyid);
4808 ccnt++;
4809 sctp_free_remote_addr(chk->whoTo);
4810 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4811 SCTP_DECR_CHK_COUNT();
4812 /* sa_ignore FREED_MEMORY */
4813 chk = TAILQ_FIRST(&asoc->sent_queue);
4814 }
4815 }
4816/*
4817 if (ccnt) {
4818 printf("Freed %d from sent_queue\n", ccnt);
4819 ccnt = 0;
4820 }
4821*/
4822 /* control queue MAY not be empty */
4823 if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4824 chk = TAILQ_FIRST(&asoc->control_send_queue);
4825 while (chk) {
4826 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4827 if (chk->data) {
4828 sctp_m_freem(chk->data);
4829 chk->data = NULL;
4830 }
4831 if (chk->holds_key_ref)
4832 sctp_auth_key_release(stcb, chk->auth_keyid);
4833 ccnt++;
4834 sctp_free_remote_addr(chk->whoTo);
4835 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4836 SCTP_DECR_CHK_COUNT();
4837 /* sa_ignore FREED_MEMORY */
4838 chk = TAILQ_FIRST(&asoc->control_send_queue);
4839 }
4840 }
4841/*
4842 if (ccnt) {
4843 printf("Freed %d from ctrl_queue\n", ccnt);
4844 ccnt = 0;
4845 }
4846*/
4847
4848 /* ASCONF queue MAY not be empty */
4849 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4850 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4851 while (chk) {
4852 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4853 if (chk->data) {
4854 sctp_m_freem(chk->data);
4855 chk->data = NULL;
4856 }
4857 if (chk->holds_key_ref)
4858 sctp_auth_key_release(stcb, chk->auth_keyid);
4859 ccnt++;
4860 sctp_free_remote_addr(chk->whoTo);
4861 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4862 SCTP_DECR_CHK_COUNT();
4863 /* sa_ignore FREED_MEMORY */
4864 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4865 }
4866 }
4867/*
4868 if (ccnt) {
4869 printf("Freed %d from asconf_queue\n", ccnt);
4870 ccnt = 0;
4871 }
4872*/
4873 if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4874 chk = TAILQ_FIRST(&asoc->reasmqueue);
4875 while (chk) {
4876 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4877 if (chk->data) {
4878 sctp_m_freem(chk->data);
4879 chk->data = NULL;
4880 }
4881 if (chk->holds_key_ref)
4882 sctp_auth_key_release(stcb, chk->auth_keyid);
4883 sctp_free_remote_addr(chk->whoTo);
4884 ccnt++;
4885 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4886 SCTP_DECR_CHK_COUNT();
4887 /* sa_ignore FREED_MEMORY */
4888 chk = TAILQ_FIRST(&asoc->reasmqueue);
4889 }
4890 }
4891/*
4892 if (ccnt) {
4893 printf("Freed %d from reasm_queue\n", ccnt);
4894 ccnt = 0;
4895 }
4896*/
4897 if (asoc->mapping_array) {
4898 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4899 asoc->mapping_array = NULL;
4900 }
4901 if (asoc->nr_mapping_array) {
4902 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4903 asoc->nr_mapping_array = NULL;
4904 }
4905 /* the stream outs */
4906 if (asoc->strmout) {
4907 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4908 asoc->strmout = NULL;
4909 }
4910 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
4911 if (asoc->strmin) {
4912 struct sctp_queued_to_read *ctl;
4913
4914 for (i = 0; i < asoc->streamincnt; i++) {
4915 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4916 /* We have somethings on the streamin queue */
4917 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4918 while (ctl) {
4919 TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4920 ctl, next);
4921 sctp_free_remote_addr(ctl->whoFrom);
4922 if (ctl->data) {
4923 sctp_m_freem(ctl->data);
4924 ctl->data = NULL;
4925 }
4926 /*
4927 * We don't free the address here
4928 * since all the net's were freed
4929 * above.
4930 */
4931 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4932 SCTP_DECR_READQ_COUNT();
4933 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4934 }
4935 }
4936 }
4937 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4938 asoc->strmin = NULL;
4939 }
4940 asoc->streamincnt = 0;
4941 while (!TAILQ_EMPTY(&asoc->nets)) {
4942 /* sa_ignore FREED_MEMORY */
4943 net = TAILQ_FIRST(&asoc->nets);
4944 /* pull from list */
4945 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
4946#ifdef INVARIANTS
4947 panic("no net's left alloc'ed, or list points to itself");
4948#endif
4949 break;
4950 }
4951 prev = net;
4952 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4953 sctp_free_remote_addr(net);
4954 }
4955
4956 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4957 /* sa_ignore FREED_MEMORY */
4958 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4959 sctp_remove_laddr(laddr);
4960 }
4961
4962 /* pending asconf (address) parameters */
4963 while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4964 /* sa_ignore FREED_MEMORY */
4965 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4966 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4967 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4968 }
4969 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4970 /* sa_ignore FREED_MEMORY */
4971 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4972 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4973 if (aack->data != NULL) {
4974 sctp_m_freem(aack->data);
4975 }
4976 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
4977 }
4978 /* clean up auth stuff */
4979 if (asoc->local_hmacs)
4980 sctp_free_hmaclist(asoc->local_hmacs);
4981 if (asoc->peer_hmacs)
4982 sctp_free_hmaclist(asoc->peer_hmacs);
4983
4984 if (asoc->local_auth_chunks)
4985 sctp_free_chunklist(asoc->local_auth_chunks);
4986 if (asoc->peer_auth_chunks)
4987 sctp_free_chunklist(asoc->peer_auth_chunks);
4988
4989 sctp_free_authinfo(&asoc->authinfo);
4990
4991 shared_key = LIST_FIRST(&asoc->shared_keys);
4992 while (shared_key) {
4993 LIST_REMOVE(shared_key, next);
4994 sctp_free_sharedkey(shared_key);
4995 /* sa_ignore FREED_MEMORY */
4996 shared_key = LIST_FIRST(&asoc->shared_keys);
4997 }
4998
4999 /* Insert new items here :> */
5000
5001 /* Get rid of LOCK */
5002 SCTP_TCB_LOCK_DESTROY(stcb);
5003 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5004 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5005 SCTP_INP_INFO_WUNLOCK();
5006 SCTP_INP_RLOCK(inp);
5007 }
5008#ifdef SCTP_TRACK_FREED_ASOCS
5009 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5010 /* now clean up the tasoc itself */
5011 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5012 SCTP_DECR_ASOC_COUNT();
5013 } else {
5014 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5015 }
5016#else
5017 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5018 SCTP_DECR_ASOC_COUNT();
5019#endif
5020 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5021 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5022 /*
5023 * If its NOT the inp_free calling us AND sctp_close
5024 * as been called, we call back...
5025 */
5026 SCTP_INP_RUNLOCK(inp);
5027 /*
5028 * This will start the kill timer (if we are the
5029 * lastone) since we hold an increment yet. But this
5030 * is the only safe way to do this since otherwise
5031 * if the socket closes at the same time we are here
5032 * we might collide in the cleanup.
5033 */
5034 sctp_inpcb_free(inp,
5035 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5036 SCTP_CALLED_DIRECTLY_NOCMPSET);
5037 SCTP_INP_DECR_REF(inp);
5038 goto out_of;
5039 } else {
5040 /* The socket is still open. */
5041 SCTP_INP_DECR_REF(inp);
5042 }
5043 }
5044 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5045 SCTP_INP_RUNLOCK(inp);
5046 }
5047out_of:
5048 /* destroyed the asoc */
5049#ifdef SCTP_LOG_CLOSING
5050 sctp_log_closing(inp, NULL, 11);
5051#endif
5052 return (1);
5053}
5054
5055
5056
5057/*
5058 * determine if a destination is "reachable" based upon the addresses bound
5059 * to the current endpoint (e.g. only v4 or v6 currently bound)
5060 */
5061/*
5062 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5063 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5064 * types bound as its endpoint
5065 */
5066int
5067sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5068{
5069 struct sctp_inpcb *inp;
5070 int answer;
5071
5072 /*
5073 * No locks here, the TCB, in all cases is already locked and an
5074 * assoc is up. There is either a INP lock by the caller applied (in
5075 * asconf case when deleting an address) or NOT in the HB case,
5076 * however if HB then the INP increment is up and the INP will not
5077 * be removed (on top of the fact that we have a TCB lock). So we
5078 * only want to read the sctp_flags, which is either bound-all or
5079 * not.. no protection needed since once an assoc is up you can't be
5080 * changing your binding.
5081 */
5082 inp = stcb->sctp_ep;
5083 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5084 /* if bound all, destination is not restricted */
5085 /*
5086 * RRS: Question during lock work: Is this correct? If you
5087 * are bound-all you still might need to obey the V4--V6
5088 * flags??? IMO this bound-all stuff needs to be removed!
5089 */
5090 return (1);
5091 }
5092 /* NOTE: all "scope" checks are done when local addresses are added */
5093 if (destaddr->sa_family == AF_INET6) {
5094 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5095 } else if (destaddr->sa_family == AF_INET) {
5096 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5097 } else {
5098 /* invalid family, so it's unreachable */
5099 answer = 0;
5100 }
5101 return (answer);
5102}
5103
5104/*
5105 * update the inp_vflags on an endpoint
5106 */
5107static void
5108sctp_update_ep_vflag(struct sctp_inpcb *inp)
5109{
5110 struct sctp_laddr *laddr;
5111
5112 /* first clear the flag */
5113 inp->ip_inp.inp.inp_vflag = 0;
5114 /* set the flag based on addresses on the ep list */
5115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5116 if (laddr->ifa == NULL) {
5117 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5118 __FUNCTION__);
5119 continue;
5120 }
5121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5122 continue;
5123 }
5124 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5125 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5126 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5127 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5128 }
5129 }
5130}
5131
5132/*
5133 * Add the address to the endpoint local address list There is nothing to be
5134 * done if we are bound to all addresses
5135 */
5136void
5137sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5138{
5139 struct sctp_laddr *laddr;
5140 int fnd, error = 0;
5141
5142 fnd = 0;
5143
5144 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5145 /* You are already bound to all. You have it already */
5146 return;
5147 }
5148 if (ifa->address.sa.sa_family == AF_INET6) {
5149 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5150 /* Can't bind a non-useable addr. */
5151 return;
5152 }
5153 }
5154 /* first, is it already present? */
5155 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5156 if (laddr->ifa == ifa) {
5157 fnd = 1;
5158 break;
5159 }
5160 }
5161
5162 if (fnd == 0) {
5163 /* Not in the ep list */
5164 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5165 if (error != 0)
5166 return;
5167 inp->laddr_count++;
5168 /* update inp_vflag flags */
5169 if (ifa->address.sa.sa_family == AF_INET6) {
5170 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5171 } else if (ifa->address.sa.sa_family == AF_INET) {
5172 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5173 }
5174 }
5175 return;
5176}
5177
5178
5179/*
5180 * select a new (hopefully reachable) destination net (should only be used
5181 * when we deleted an ep addr that is the only usable source address to reach
5182 * the destination net)
5183 */
5184static void
5185sctp_select_primary_destination(struct sctp_tcb *stcb)
5186{
5187 struct sctp_nets *net;
5188
5189 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5190 /* for now, we'll just pick the first reachable one we find */
5191 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5192 continue;
5193 if (sctp_destination_is_reachable(stcb,
5194 (struct sockaddr *)&net->ro._l_addr)) {
5195 /* found a reachable destination */
5196 stcb->asoc.primary_destination = net;
5197 }
5198 }
5199 /* I can't there from here! ...we're gonna die shortly... */
5200}
5201
5202
5203/*
5204 * Delete the address from the endpoint local address list There is nothing
5205 * to be done if we are bound to all addresses
5206 */
5207void
5208sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5209{
5210 struct sctp_laddr *laddr;
5211 int fnd;
5212
5213 fnd = 0;
5214 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5215 /* You are already bound to all. You have it already */
5216 return;
5217 }
5218 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5219 if (laddr->ifa == ifa) {
5220 fnd = 1;
5221 break;
5222 }
5223 }
5224 if (fnd && (inp->laddr_count < 2)) {
5225 /* can't delete unless there are at LEAST 2 addresses */
5226 return;
5227 }
5228 if (fnd) {
5229 /*
5230 * clean up any use of this address go through our
5231 * associations and clear any last_used_address that match
5232 * this one for each assoc, see if a new primary_destination
5233 * is needed
5234 */
5235 struct sctp_tcb *stcb;
5236
5237 /* clean up "next_addr_touse" */
5238 if (inp->next_addr_touse == laddr)
5239 /* delete this address */
5240 inp->next_addr_touse = NULL;
5241
5242 /* clean up "last_used_address" */
5243 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5244 struct sctp_nets *net;
5245
5246 SCTP_TCB_LOCK(stcb);
5247 if (stcb->asoc.last_used_address == laddr)
5248 /* delete this address */
5249 stcb->asoc.last_used_address = NULL;
5250 /*
5251 * Now spin through all the nets and purge any ref
5252 * to laddr
5253 */
5254 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5255 if (net->ro._s_addr &&
5256 (net->ro._s_addr->ifa == laddr->ifa)) {
5257 /* Yep, purge src address selected */
5258 sctp_rtentry_t *rt;
5259
5260 /* delete this address if cached */
5261 rt = net->ro.ro_rt;
5262 if (rt != NULL) {
5263 RTFREE(rt);
5264 net->ro.ro_rt = NULL;
5265 }
5266 sctp_free_ifa(net->ro._s_addr);
5267 net->ro._s_addr = NULL;
5268 net->src_addr_selected = 0;
5269 }
5270 }
5271 SCTP_TCB_UNLOCK(stcb);
5272 } /* for each tcb */
5273 /* remove it from the ep list */
5274 sctp_remove_laddr(laddr);
5275 inp->laddr_count--;
5276 /* update inp_vflag flags */
5277 sctp_update_ep_vflag(inp);
5278 }
5279 return;
5280}
5281
5282/*
5283 * Add the address to the TCB local address restricted list.
5284 * This is a "pending" address list (eg. addresses waiting for an
5285 * ASCONF-ACK response) and cannot be used as a valid source address.
5286 */
5287void
5288sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5289{
5290 struct sctp_inpcb *inp;
5291 struct sctp_laddr *laddr;
5292 struct sctpladdr *list;
5293
5294 /*
5295 * Assumes TCB is locked.. and possibly the INP. May need to
5296 * confirm/fix that if we need it and is not the case.
5297 */
5298 list = &stcb->asoc.sctp_restricted_addrs;
5299
5300 inp = stcb->sctp_ep;
5301 if (ifa->address.sa.sa_family == AF_INET6) {
5302 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5303 /* Can't bind a non-existent addr. */
5304 return;
5305 }
5306 }
5307 /* does the address already exist? */
5308 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5309 if (laddr->ifa == ifa) {
5310 return;
5311 }
5312 }
5313
5314 /* add to the list */
5315 (void)sctp_insert_laddr(list, ifa, 0);
5316 return;
5317}
5318
5319/*
5320 * insert an laddr entry with the given ifa for the desired list
5321 */
5322int
5323sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5324{
5325 struct sctp_laddr *laddr;
5326
5327 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5328 if (laddr == NULL) {
5329 /* out of memory? */
5330 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5331 return (EINVAL);
5332 }
5333 SCTP_INCR_LADDR_COUNT();
5334 bzero(laddr, sizeof(*laddr));
5335 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5336 laddr->ifa = ifa;
5337 laddr->action = act;
5338 atomic_add_int(&ifa->refcount, 1);
5339 /* insert it */
5340 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5341
5342 return (0);
5343}
5344
5345/*
5346 * Remove an laddr entry from the local address list (on an assoc)
5347 */
5348void
5349sctp_remove_laddr(struct sctp_laddr *laddr)
5350{
5351
5352 /* remove from the list */
5353 LIST_REMOVE(laddr, sctp_nxt_addr);
5354 sctp_free_ifa(laddr->ifa);
5355 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5356 SCTP_DECR_LADDR_COUNT();
5357}
5358
5359/*
5360 * Remove a local address from the TCB local address restricted list
5361 */
5362void
5363sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5364{
5365 struct sctp_inpcb *inp;
5366 struct sctp_laddr *laddr;
5367
5368 /*
5369 * This is called by asconf work. It is assumed that a) The TCB is
5370 * locked and b) The INP is locked. This is true in as much as I can
5371 * trace through the entry asconf code where I did these locks.
5372 * Again, the ASCONF code is a bit different in that it does lock
5373 * the INP during its work often times. This must be since we don't
5374 * want other proc's looking up things while what they are looking
5375 * up is changing :-D
5376 */
5377
5378 inp = stcb->sctp_ep;
5379 /* if subset bound and don't allow ASCONF's, can't delete last */
5380 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5381 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5382 if (stcb->sctp_ep->laddr_count < 2) {
5383 /* can't delete last address */
5384 return;
5385 }
5386 }
5387 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5388 /* remove the address if it exists */
5389 if (laddr->ifa == NULL)
5390 continue;
5391 if (laddr->ifa == ifa) {
5392 sctp_remove_laddr(laddr);
5393 return;
5394 }
5395 }
5396
5397 /* address not found! */
5398 return;
5399}
5400
5401/*
5402 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5403 */
5404/* sysctl */
5405static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5406static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5407
5408void
5409sctp_pcb_init()
5410{
5411 /*
5412 * SCTP initialization for the PCB structures should be called by
5413 * the sctp_init() funciton.
5414 */
5415 int i;
5416 struct timeval tv;
5417
5418 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5419 /* error I was called twice */
5420 return;
5421 }
5422 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5423
5424#if defined(SCTP_LOCAL_TRACE_BUF)
5425 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5426#endif
5427 (void)SCTP_GETTIME_TIMEVAL(&tv);
5428 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5429 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5430 /* init the empty list of (All) Endpoints */
5431 LIST_INIT(&SCTP_BASE_INFO(listhead));
5432
5433 /* init the iterator head */
5434 TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead));
5435
5436 /* init the hash table of endpoints */
5437 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5438 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5439 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5440 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5441 &SCTP_BASE_INFO(hashasocmark));
5442 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5443 &SCTP_BASE_INFO(hashmark));
5444 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5445 &SCTP_BASE_INFO(hashtcpmark));
5446 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5447
5448
5449 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5450 &SCTP_BASE_INFO(hashvrfmark));
5451
5452 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5453 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5454 /* init the zones */
5455 /*
5456 * FIX ME: Should check for NULL returns, but if it does fail we are
5457 * doomed to panic anyways... add later maybe.
5458 */
5459 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5460 sizeof(struct sctp_inpcb), maxsockets);
5461
5462 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5463 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5464
5465 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5466 sizeof(struct sctp_laddr),
5467 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5468
5469 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5470 sizeof(struct sctp_nets),
5471 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5472
5473 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5474 sizeof(struct sctp_tmit_chunk),
5475 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5476
5477 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5478 sizeof(struct sctp_queued_to_read),
5479 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5480
5481 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5482 sizeof(struct sctp_stream_queue_pending),
5483 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5484
5485 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5486 sizeof(struct sctp_asconf),
5487 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5488
5489 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5490 sizeof(struct sctp_asconf_ack),
5491 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5492
5493
5494 /* Master Lock INIT for info structure */
5495 SCTP_INP_INFO_LOCK_INIT();
5496 SCTP_STATLOG_INIT_LOCK();
5497 SCTP_ITERATOR_LOCK_INIT();
5498
5499 SCTP_IPI_COUNT_INIT();
5500 SCTP_IPI_ADDR_INIT();
5501 SCTP_IPI_ITERATOR_WQ_INIT();
5502#ifdef SCTP_PACKET_LOGGING
5503 SCTP_IP_PKTLOG_INIT();
5504#endif
5505 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5506
5507 /* not sure if we need all the counts */
5508 SCTP_BASE_INFO(ipi_count_ep) = 0;
5509 /* assoc/tcb zone info */
5510 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5511 /* local addrlist zone info */
5512 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5513 /* remote addrlist zone info */
5514 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5515 /* chunk info */
5516 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5517
5518 /* socket queue zone info */
5519 SCTP_BASE_INFO(ipi_count_readq) = 0;
5520
5521 /* stream out queue cont */
5522 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5523
5524 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5525 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5526
5527 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5528
5529 /* Init the TIMEWAIT list */
5530 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5531 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i]));
5532 }
5533
5534#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5535 SCTP_BASE_INFO(iterator_running) = 0;
5536 SCTP_BASE_INFO(threads_must_exit) = 0;
5537 sctp_startup_iterator();
5538#endif
5539
5540 /*
5541 * INIT the default VRF which for BSD is the only one, other O/S's
5542 * may have more. But initially they must start with one and then
5543 * add the VRF's as addresses are added.
5544 */
5545 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5546
5547}
5548
5549/*
5550 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5551 */
5552void
5553sctp_pcb_finish(void)
5554{
5555 struct sctp_vrflist *vrf_bucket;
5556 struct sctp_vrf *vrf;
5557 struct sctp_ifn *ifn;
5558 struct sctp_ifa *ifa;
5559 struct sctpvtaghead *chain;
5560 struct sctp_tagblock *twait_block, *prev_twait_block;
5561 int i;
5562
5563 /*
5564 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5565 * destroyed first).
5566 */
5567 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5568 vrf = LIST_FIRST(vrf_bucket);
5569 while (vrf) {
5570 ifn = LIST_FIRST(&vrf->ifnlist);
5571 while (ifn) {
5572 ifa = LIST_FIRST(&ifn->ifalist);
5573 while (ifa) {
5574 /* free the ifa */
5575 LIST_REMOVE(ifa, next_bucket);
5576 LIST_REMOVE(ifa, next_ifa);
5577 SCTP_FREE(ifa, SCTP_M_IFA);
5578 ifa = LIST_FIRST(&ifn->ifalist);
5579 }
5580 /* free the ifn */
5581 LIST_REMOVE(ifn, next_bucket);
5582 LIST_REMOVE(ifn, next_ifn);
5583 SCTP_FREE(ifn, SCTP_M_IFN);
5584 ifn = LIST_FIRST(&vrf->ifnlist);
5585 }
5586 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5587 /* free the vrf */
5588 LIST_REMOVE(vrf, next_vrf);
5589 SCTP_FREE(vrf, SCTP_M_VRF);
5590 vrf = LIST_FIRST(vrf_bucket);
5591 }
5592 /* free the vrf hashes */
5593 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5594 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5595
5596 /*
5597 * free the TIMEWAIT list elements malloc'd in the function
5598 * sctp_add_vtag_to_timewait()...
5599 */
5600 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5601 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5602 if (!SCTP_LIST_EMPTY(chain)) {
5603 prev_twait_block = NULL;
5604 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5605 if (prev_twait_block) {
5606 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5607 }
5608 prev_twait_block = twait_block;
5609 }
5610 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5611 }
5612 }
5613
5614 /* free the locks and mutexes */
5615#ifdef SCTP_PACKET_LOGGING
5616 SCTP_IP_PKTLOG_DESTROY();
5617
5618#endif
5619 SCTP_IPI_ITERATOR_WQ_DESTROY();
5620 SCTP_IPI_ADDR_DESTROY();
5621 SCTP_ITERATOR_LOCK_DESTROY();
5622 SCTP_STATLOG_DESTROY();
5623 SCTP_INP_INFO_LOCK_DESTROY();
5624
5625 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5626 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5627 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5628 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5629 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5630 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5631 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5632 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5633 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5634 /* Get rid of other stuff to */
5635 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5636 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5637 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5638 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5639 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5640 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5641
5642}
5643
5644
5645int
5646sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5647 int iphlen, int offset, int limit, struct sctphdr *sh,
5648 struct sockaddr *altsa)
5649{
5650 /*
5651 * grub through the INIT pulling addresses and loading them to the
5652 * nets structure in the asoc. The from address in the mbuf should
5653 * also be loaded (if it is not already). This routine can be called
5654 * with either INIT or INIT-ACK's as long as the m points to the IP
5655 * packet and the offset points to the beginning of the parameters.
5656 */
5657 struct sctp_inpcb *inp, *l_inp;
5658 struct sctp_nets *net, *net_tmp;
5659 struct ip *iph;
5660 struct sctp_paramhdr *phdr, parm_buf;
5661 struct sctp_tcb *stcb_tmp;
5662 uint16_t ptype, plen;
5663 struct sockaddr *sa;
5664 struct sockaddr_storage dest_store;
5665 struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5666 struct sockaddr_in sin;
5667 struct sockaddr_in6 sin6;
5668 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5669 struct sctp_auth_random *p_random = NULL;
5670 uint16_t random_len = 0;
5671 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5672 struct sctp_auth_hmac_algo *hmacs = NULL;
5673 uint16_t hmacs_len = 0;
5674 uint8_t saw_asconf = 0;
5675 uint8_t saw_asconf_ack = 0;
5676 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5677 struct sctp_auth_chunk_list *chunks = NULL;
5678 uint16_t num_chunks = 0;
5679 sctp_key_t *new_key;
5680 uint32_t keylen;
5681 int got_random = 0, got_hmacs = 0, got_chklist = 0;
5682
5683 /* First get the destination address setup too. */
5684 memset(&sin, 0, sizeof(sin));
5685 memset(&sin6, 0, sizeof(sin6));
5686
5687 sin.sin_family = AF_INET;
5688 sin.sin_len = sizeof(sin);
5689 sin.sin_port = stcb->rport;
5690
5691 sin6.sin6_family = AF_INET6;
5692 sin6.sin6_len = sizeof(struct sockaddr_in6);
5693 sin6.sin6_port = stcb->rport;
5694 if (altsa == NULL) {
5695 iph = mtod(m, struct ip *);
5696 switch (iph->ip_v) {
5697 case IPVERSION:
5698 {
5699 /* its IPv4 */
5700 struct sockaddr_in *sin_2;
5701
5702 sin_2 = (struct sockaddr_in *)(local_sa);
5703 memset(sin_2, 0, sizeof(sin));
5704 sin_2->sin_family = AF_INET;
5705 sin_2->sin_len = sizeof(sin);
5706 sin_2->sin_port = sh->dest_port;
5707 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5708 sin.sin_addr = iph->ip_src;
5709 sa = (struct sockaddr *)&sin;
5710 break;
5711 }
5712#ifdef INET6
5713 case IPV6_VERSION >> 4:
5714 {
5715 /* its IPv6 */
5716 struct ip6_hdr *ip6;
5717 struct sockaddr_in6 *sin6_2;
5718
5719 ip6 = mtod(m, struct ip6_hdr *);
5720 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5721 memset(sin6_2, 0, sizeof(sin6));
5722 sin6_2->sin6_family = AF_INET6;
5723 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5724 sin6_2->sin6_port = sh->dest_port;
5725 sin6.sin6_addr = ip6->ip6_src;
5726 sa = (struct sockaddr *)&sin6;
5727 break;
5728 }
5729#endif
5730 default:
5731 sa = NULL;
5732 break;
5733 }
5734 } else {
5735 /*
5736 * For cookies we use the src address NOT from the packet
5737 * but from the original INIT
5738 */
5739 sa = altsa;
5740 }
5741 /* Turn off ECN until we get through all params */
5742 stcb->asoc.ecn_allowed = 0;
5743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5744 /* mark all addresses that we have currently on the list */
5745 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5746 }
5747 /* does the source address already exist? if so skip it */
5748 l_inp = inp = stcb->sctp_ep;
5749
5750 atomic_add_int(&stcb->asoc.refcnt, 1);
5751 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5752 atomic_add_int(&stcb->asoc.refcnt, -1);
5753
5754 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5755 /* we must add the source address */
5756 /* no scope set here since we have a tcb already. */
5757 if ((sa->sa_family == AF_INET) &&
5758 (stcb->asoc.ipv4_addr_legal)) {
5759 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5760 return (-1);
5761 }
5762 } else if ((sa->sa_family == AF_INET6) &&
5763 (stcb->asoc.ipv6_addr_legal)) {
5764 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5765 return (-2);
5766 }
5767 }
5768 } else {
5769 if (net_tmp != NULL && stcb_tmp == stcb) {
5770 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5771 } else if (stcb_tmp != stcb) {
5772 /* It belongs to another association? */
5773 if (stcb_tmp)
5774 SCTP_TCB_UNLOCK(stcb_tmp);
5775 return (-3);
5776 }
5777 }
5778 if (stcb->asoc.state == 0) {
5779 /* the assoc was freed? */
5780 return (-4);
5781 }
5782 /*
5783 * peer must explicitly turn this on. This may have been initialized
5784 * to be "on" in order to allow local addr changes while INIT's are
5785 * in flight.
5786 */
5787 stcb->asoc.peer_supports_asconf = 0;
5788 /* now we must go through each of the params. */
5789 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5790 while (phdr) {
5791 ptype = ntohs(phdr->param_type);
5792 plen = ntohs(phdr->param_length);
5793 /*
5794 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5795 * (int)plen);
5796 */
5797 if (offset + plen > limit) {
5798 break;
5799 }
5800 if (plen == 0) {
5801 break;
5802 }
5803 if (ptype == SCTP_IPV4_ADDRESS) {
5804 if (stcb->asoc.ipv4_addr_legal) {
5805 struct sctp_ipv4addr_param *p4, p4_buf;
5806
5807 /* ok get the v4 address and check/add */
5808 phdr = sctp_get_next_param(m, offset,
5809 (struct sctp_paramhdr *)&p4_buf,
5810 sizeof(p4_buf));
5811 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5812 phdr == NULL) {
5813 return (-5);
5814 }
5815 p4 = (struct sctp_ipv4addr_param *)phdr;
5816 sin.sin_addr.s_addr = p4->addr;
5817 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5818 /* Skip multi-cast addresses */
5819 goto next_param;
5820 }
5821 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5822 (sin.sin_addr.s_addr == INADDR_ANY)) {
5823 goto next_param;
5824 }
5825 sa = (struct sockaddr *)&sin;
5826 inp = stcb->sctp_ep;
5827 atomic_add_int(&stcb->asoc.refcnt, 1);
5828 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5829 local_sa, stcb);
5830 atomic_add_int(&stcb->asoc.refcnt, -1);
5831
5832 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5833 inp == NULL) {
5834 /* we must add the source address */
5835 /*
5836 * no scope set since we have a tcb
5837 * already
5838 */
5839
5840 /*
5841 * we must validate the state again
5842 * here
5843 */
5844 add_it_now:
5845 if (stcb->asoc.state == 0) {
5846 /* the assoc was freed? */
5847 return (-7);
5848 }
5849 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5850 return (-8);
5851 }
5852 } else if (stcb_tmp == stcb) {
5853 if (stcb->asoc.state == 0) {
5854 /* the assoc was freed? */
5855 return (-10);
5856 }
5857 if (net != NULL) {
5858 /* clear flag */
5859 net->dest_state &=
5860 ~SCTP_ADDR_NOT_IN_ASSOC;
5861 }
5862 } else {
5863 /*
5864 * strange, address is in another
5865 * assoc? straighten out locks.
5866 */
5867 if (stcb_tmp) {
5868 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5869 /*
5870 * in setup state we
5871 * abort this guy
5872 */
5873 sctp_abort_an_association(stcb_tmp->sctp_ep,
5874 stcb_tmp, 1, NULL, 0);
5875 goto add_it_now;
5876 }
5877 SCTP_TCB_UNLOCK(stcb_tmp);
5878 }
5879 if (stcb->asoc.state == 0) {
5880 /* the assoc was freed? */
5881 return (-12);
5882 }
5883 return (-13);
5884 }
5885 }
5886 } else if (ptype == SCTP_IPV6_ADDRESS) {
5887 if (stcb->asoc.ipv6_addr_legal) {
5888 /* ok get the v6 address and check/add */
5889 struct sctp_ipv6addr_param *p6, p6_buf;
5890
5891 phdr = sctp_get_next_param(m, offset,
5892 (struct sctp_paramhdr *)&p6_buf,
5893 sizeof(p6_buf));
5894 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5895 phdr == NULL) {
5896 return (-14);
5897 }
5898 p6 = (struct sctp_ipv6addr_param *)phdr;
5899 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5900 sizeof(p6->addr));
5901 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5902 /* Skip multi-cast addresses */
5903 goto next_param;
5904 }
5905 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5906 /*
5907 * Link local make no sense without
5908 * scope
5909 */
5910 goto next_param;
5911 }
5912 sa = (struct sockaddr *)&sin6;
5913 inp = stcb->sctp_ep;
5914 atomic_add_int(&stcb->asoc.refcnt, 1);
5915 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5916 local_sa, stcb);
5917 atomic_add_int(&stcb->asoc.refcnt, -1);
5918 if (stcb_tmp == NULL &&
5919 (inp == stcb->sctp_ep || inp == NULL)) {
5920 /*
5921 * we must validate the state again
5922 * here
5923 */
5924 add_it_now6:
5925 if (stcb->asoc.state == 0) {
5926 /* the assoc was freed? */
5927 return (-16);
5928 }
5929 /*
5930 * we must add the address, no scope
5931 * set
5932 */
5933 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5934 return (-17);
5935 }
5936 } else if (stcb_tmp == stcb) {
5937 /*
5938 * we must validate the state again
5939 * here
5940 */
5941 if (stcb->asoc.state == 0) {
5942 /* the assoc was freed? */
5943 return (-19);
5944 }
5945 if (net != NULL) {
5946 /* clear flag */
5947 net->dest_state &=
5948 ~SCTP_ADDR_NOT_IN_ASSOC;
5949 }
5950 } else {
5951 /*
5952 * strange, address is in another
5953 * assoc? straighten out locks.
5954 */
5955 if (stcb_tmp)
5956 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5957 /*
5958 * in setup state we
5959 * abort this guy
5960 */
5961 sctp_abort_an_association(stcb_tmp->sctp_ep,
5962 stcb_tmp, 1, NULL, 0);
5963 goto add_it_now6;
5964 }
5965 SCTP_TCB_UNLOCK(stcb_tmp);
5966
5967 if (stcb->asoc.state == 0) {
5968 /* the assoc was freed? */
5969 return (-21);
5970 }
5971 return (-22);
5972 }
5973 }
5974 } else if (ptype == SCTP_ECN_CAPABLE) {
5975 stcb->asoc.ecn_allowed = 1;
5976 } else if (ptype == SCTP_ULP_ADAPTATION) {
5977 if (stcb->asoc.state != SCTP_STATE_OPEN) {
5978 struct sctp_adaptation_layer_indication ai,
5979 *aip;
5980
5981 phdr = sctp_get_next_param(m, offset,
5982 (struct sctp_paramhdr *)&ai, sizeof(ai));
5983 aip = (struct sctp_adaptation_layer_indication *)phdr;
5984 if (aip) {
5985 stcb->asoc.peers_adaptation = ntohl(aip->indication);
5986 stcb->asoc.adaptation_needed = 1;
5987 }
5988 }
5989 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5990 struct sctp_asconf_addr_param lstore, *fee;
5991 struct sctp_asconf_addrv4_param *fii;
5992 int lptype;
5993 struct sockaddr *lsa = NULL;
5994
5995 stcb->asoc.peer_supports_asconf = 1;
5996 if (plen > sizeof(lstore)) {
5997 return (-23);
5998 }
5999 phdr = sctp_get_next_param(m, offset,
6000 (struct sctp_paramhdr *)&lstore,
6001 min(plen, sizeof(lstore)));
6002 if (phdr == NULL) {
6003 return (-24);
6004 }
6005 fee = (struct sctp_asconf_addr_param *)phdr;
6006 lptype = ntohs(fee->addrp.ph.param_type);
6007 if (lptype == SCTP_IPV4_ADDRESS) {
6008 if (plen !=
6009 sizeof(struct sctp_asconf_addrv4_param)) {
6010 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6011 (int)sizeof(struct sctp_asconf_addrv4_param),
6012 plen);
6013 } else {
6014 fii = (struct sctp_asconf_addrv4_param *)fee;
6015 sin.sin_addr.s_addr = fii->addrp.addr;
6016 lsa = (struct sockaddr *)&sin;
6017 }
6018 } else if (lptype == SCTP_IPV6_ADDRESS) {
6019 if (plen !=
6020 sizeof(struct sctp_asconf_addr_param)) {
6021 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6022 (int)sizeof(struct sctp_asconf_addr_param),
6023 plen);
6024 } else {
6025 memcpy(sin6.sin6_addr.s6_addr,
6026 fee->addrp.addr,
6027 sizeof(fee->addrp.addr));
6028 lsa = (struct sockaddr *)&sin6;
6029 }
6030 }
6031 if (lsa) {
6032 (void)sctp_set_primary_addr(stcb, sa, NULL);
6033 }
6034 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6035 stcb->asoc.peer_supports_nat = 1;
6036 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6037 /* Peer supports pr-sctp */
6038 stcb->asoc.peer_supports_prsctp = 1;
6039 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6040 /* A supported extension chunk */
6041 struct sctp_supported_chunk_types_param *pr_supported;
6042 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6043 int num_ent, i;
6044
6045 phdr = sctp_get_next_param(m, offset,
6046 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6047 if (phdr == NULL) {
6048 return (-25);
6049 }
6050 stcb->asoc.peer_supports_asconf = 0;
6051 stcb->asoc.peer_supports_prsctp = 0;
6052 stcb->asoc.peer_supports_pktdrop = 0;
6053 stcb->asoc.peer_supports_strreset = 0;
6054 stcb->asoc.peer_supports_nr_sack = 0;
6055 stcb->asoc.peer_supports_auth = 0;
6056 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6057 num_ent = plen - sizeof(struct sctp_paramhdr);
6058 for (i = 0; i < num_ent; i++) {
6059 switch (pr_supported->chunk_types[i]) {
6060 case SCTP_ASCONF:
6061 case SCTP_ASCONF_ACK:
6062 stcb->asoc.peer_supports_asconf = 1;
6063 break;
6064 case SCTP_FORWARD_CUM_TSN:
6065 stcb->asoc.peer_supports_prsctp = 1;
6066 break;
6067 case SCTP_PACKET_DROPPED:
6068 stcb->asoc.peer_supports_pktdrop = 1;
6069 break;
6070 case SCTP_NR_SELECTIVE_ACK:
6071 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
6072 stcb->asoc.peer_supports_nr_sack = 1;
6073 else
6074 stcb->asoc.peer_supports_nr_sack = 0;
6075 break;
6076 case SCTP_STREAM_RESET:
6077 stcb->asoc.peer_supports_strreset = 1;
6078 break;
6079 case SCTP_AUTHENTICATION:
6080 stcb->asoc.peer_supports_auth = 1;
6081 break;
6082 default:
6083 /* one I have not learned yet */
6084 break;
6085
6086 }
6087 }
6088 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6089 /* Peer supports ECN-nonce */
6090 stcb->asoc.peer_supports_ecn_nonce = 1;
6091 stcb->asoc.ecn_nonce_allowed = 1;
6092 } else if (ptype == SCTP_RANDOM) {
6093 if (plen > sizeof(random_store))
6094 break;
6095 if (got_random) {
6096 /* already processed a RANDOM */
6097 goto next_param;
6098 }
6099 phdr = sctp_get_next_param(m, offset,
6100 (struct sctp_paramhdr *)random_store,
6101 min(sizeof(random_store), plen));
6102 if (phdr == NULL)
6103 return (-26);
6104 p_random = (struct sctp_auth_random *)phdr;
6105 random_len = plen - sizeof(*p_random);
6106 /* enforce the random length */
6107 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6108 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6109 return (-27);
6110 }
6111 got_random = 1;
6112 } else if (ptype == SCTP_HMAC_LIST) {
6113 int num_hmacs;
6114 int i;
6115
6116 if (plen > sizeof(hmacs_store))
6117 break;
6118 if (got_hmacs) {
6119 /* already processed a HMAC list */
6120 goto next_param;
6121 }
6122 phdr = sctp_get_next_param(m, offset,
6123 (struct sctp_paramhdr *)hmacs_store,
6124 min(plen, sizeof(hmacs_store)));
6125 if (phdr == NULL)
6126 return (-28);
6127 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6128 hmacs_len = plen - sizeof(*hmacs);
6129 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6130 /* validate the hmac list */
6131 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6132 return (-29);
6133 }
6134 if (stcb->asoc.peer_hmacs != NULL)
6135 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6136 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6137 if (stcb->asoc.peer_hmacs != NULL) {
6138 for (i = 0; i < num_hmacs; i++) {
6139 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6140 ntohs(hmacs->hmac_ids[i]));
6141 }
6142 }
6143 got_hmacs = 1;
6144 } else if (ptype == SCTP_CHUNK_LIST) {
6145 int i;
6146
6147 if (plen > sizeof(chunks_store))
6148 break;
6149 if (got_chklist) {
6150 /* already processed a Chunks list */
6151 goto next_param;
6152 }
6153 phdr = sctp_get_next_param(m, offset,
6154 (struct sctp_paramhdr *)chunks_store,
6155 min(plen, sizeof(chunks_store)));
6156 if (phdr == NULL)
6157 return (-30);
6158 chunks = (struct sctp_auth_chunk_list *)phdr;
6159 num_chunks = plen - sizeof(*chunks);
6160 if (stcb->asoc.peer_auth_chunks != NULL)
6161 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6162 else
6163 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6164 for (i = 0; i < num_chunks; i++) {
6165 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6166 stcb->asoc.peer_auth_chunks);
6167 /* record asconf/asconf-ack if listed */
6168 if (chunks->chunk_types[i] == SCTP_ASCONF)
6169 saw_asconf = 1;
6170 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6171 saw_asconf_ack = 1;
6172
6173 }
6174 got_chklist = 1;
6175 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6176 (ptype == SCTP_STATE_COOKIE) ||
6177 (ptype == SCTP_UNRECOG_PARAM) ||
6178 (ptype == SCTP_COOKIE_PRESERVE) ||
6179 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6180 (ptype == SCTP_ADD_IP_ADDRESS) ||
6181 (ptype == SCTP_DEL_IP_ADDRESS) ||
6182 (ptype == SCTP_ERROR_CAUSE_IND) ||
6183 (ptype == SCTP_SUCCESS_REPORT)) {
6184 /* don't care */ ;
6185 } else {
6186 if ((ptype & 0x8000) == 0x0000) {
6187 /*
6188 * must stop processing the rest of the
6189 * param's. Any report bits were handled
6190 * with the call to
6191 * sctp_arethere_unrecognized_parameters()
6192 * when the INIT or INIT-ACK was first seen.
6193 */
6194 break;
6195 }
6196 }
6197
6198next_param:
6199 offset += SCTP_SIZE32(plen);
6200 if (offset >= limit) {
6201 break;
6202 }
6203 phdr = sctp_get_next_param(m, offset, &parm_buf,
6204 sizeof(parm_buf));
6205 }
6206 /* Now check to see if we need to purge any addresses */
6207 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6208 net_tmp = TAILQ_NEXT(net, sctp_next);
6209 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6210 SCTP_ADDR_NOT_IN_ASSOC) {
6211 /* This address has been removed from the asoc */
6212 /* remove and free it */
6213 stcb->asoc.numnets--;
6214 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6215 sctp_free_remote_addr(net);
6216 if (net == stcb->asoc.primary_destination) {
6217 stcb->asoc.primary_destination = NULL;
6218 sctp_select_primary_destination(stcb);
6219 }
6220 }
6221 }
6222 /* validate authentication required parameters */
6223 if (got_random && got_hmacs) {
6224 stcb->asoc.peer_supports_auth = 1;
6225 } else {
6226 stcb->asoc.peer_supports_auth = 0;
6227 }
6228 if (!stcb->asoc.peer_supports_auth && got_chklist) {
6229 /* peer does not support auth but sent a chunks list? */
6230 return (-31);
6231 }
6232 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6233 !stcb->asoc.peer_supports_auth) {
6234 /* peer supports asconf but not auth? */
6235 return (-32);
6236 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6237 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6238 return (-33);
6239 }
6240 /* concatenate the full random key */
6241#ifdef SCTP_AUTH_DRAFT_04
6242 keylen = random_len;
6243 new_key = sctp_alloc_key(keylen);
6244 if (new_key != NULL) {
6245 /* copy in the RANDOM */
6246 if (p_random != NULL)
6247 bcopy(p_random->random_data, new_key->key, random_len);
6248 }
6249#else
6250 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6251 if (chunks != NULL) {
6252 keylen += sizeof(*chunks) + num_chunks;
6253 }
6254 new_key = sctp_alloc_key(keylen);
6255 if (new_key != NULL) {
6256 /* copy in the RANDOM */
6257 if (p_random != NULL) {
6258 keylen = sizeof(*p_random) + random_len;
6259 bcopy(p_random, new_key->key, keylen);
6260 }
6261 /* append in the AUTH chunks */
6262 if (chunks != NULL) {
6263 bcopy(chunks, new_key->key + keylen,
6264 sizeof(*chunks) + num_chunks);
6265 keylen += sizeof(*chunks) + num_chunks;
6266 }
6267 /* append in the HMACs */
6268 if (hmacs != NULL) {
6269 bcopy(hmacs, new_key->key + keylen,
6270 sizeof(*hmacs) + hmacs_len);
6271 }
6272 }
6273#endif
6274 else {
6275 /* failed to get memory for the key */
6276 return (-34);
6277 }
6278 if (stcb->asoc.authinfo.peer_random != NULL)
6279 sctp_free_key(stcb->asoc.authinfo.peer_random);
6280 stcb->asoc.authinfo.peer_random = new_key;
6281#ifdef SCTP_AUTH_DRAFT_04
6282 /* don't include the chunks and hmacs for draft -04 */
6283 stcb->asoc.authinfo.peer_random->keylen = random_len;
6284#endif
6285 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6286 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6287
6288 return (0);
6289}
6290
6291int
6292sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6293 struct sctp_nets *net)
6294{
6295 /* make sure the requested primary address exists in the assoc */
6296 if (net == NULL && sa)
6297 net = sctp_findnet(stcb, sa);
6298
6299 if (net == NULL) {
6300 /* didn't find the requested primary address! */
6301 return (-1);
6302 } else {
6303 /* set the primary address */
6304 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6305 /* Must be confirmed, so queue to set */
6306 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6307 return (0);
6308 }
6309 stcb->asoc.primary_destination = net;
6310 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6311 net = TAILQ_FIRST(&stcb->asoc.nets);
6312 if (net != stcb->asoc.primary_destination) {
6313 /*
6314 * first one on the list is NOT the primary
6315 * sctp_cmpaddr() is much more efficent if the
6316 * primary is the first on the list, make it so.
6317 */
6318 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6319 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6320 }
6321 return (0);
6322 }
6323}
6324
6325int
6326sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6327{
6328 /*
6329 * This function serves two purposes. It will see if a TAG can be
6330 * re-used and return 1 for yes it is ok and 0 for don't use that
6331 * tag. A secondary function it will do is purge out old tags that
6332 * can be removed.
6333 */
6334 struct sctpvtaghead *chain;
6335 struct sctp_tagblock *twait_block;
6336 struct sctpasochead *head;
6337 struct sctp_tcb *stcb;
6338 int i;
6339
6340 SCTP_INP_INFO_RLOCK();
6341 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6342 SCTP_BASE_INFO(hashasocmark))];
6343 if (head == NULL) {
6344 /* invalid vtag */
6345 goto skip_vtag_check;
6346 }
6347 LIST_FOREACH(stcb, head, sctp_asocs) {
6348 /*
6349 * We choose not to lock anything here. TCB's can't be
6350 * removed since we have the read lock, so they can't be
6351 * freed on us, same thing for the INP. I may be wrong with
6352 * this assumption, but we will go with it for now :-)
6353 */
6354 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6355 continue;
6356 }
6357 if (stcb->asoc.my_vtag == tag) {
6358 /* candidate */
6359 if (stcb->rport != rport) {
6360 continue;
6361 }
6362 if (stcb->sctp_ep->sctp_lport != lport) {
6363 continue;
6364 }
6365 /* Its a used tag set */
6366 SCTP_INP_INFO_WUNLOCK();
6367 return (0);
6368 }
6369 }
6370skip_vtag_check:
6371
6372 chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))];
6373 /* Now what about timed wait ? */
6374 if (!SCTP_LIST_EMPTY(chain)) {
6375 /*
6376 * Block(s) are present, lets see if we have this tag in the
6377 * list
6378 */
6379 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6380 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6381 if (twait_block->vtag_block[i].v_tag == 0) {
6382 /* not used */
6383 continue;
6384 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6385 now->tv_sec) {
6386 /* Audit expires this guy */
6387 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6388 twait_block->vtag_block[i].v_tag = 0;
6389 twait_block->vtag_block[i].lport = 0;
6390 twait_block->vtag_block[i].rport = 0;
6391 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6392 (twait_block->vtag_block[i].lport == lport) &&
6393 (twait_block->vtag_block[i].rport == rport)) {
6394 /* Bad tag, sorry :< */
6395 SCTP_INP_INFO_WUNLOCK();
6396 return (0);
6397 }
6398 }
6399 }
6400 }
6401 SCTP_INP_INFO_RUNLOCK();
6402 return (1);
6403}
6404
6405
6406static sctp_assoc_t reneged_asoc_ids[256];
6407static uint8_t reneged_at = 0;
6408
6409
6410static void
6411sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6412{
6413 /*
6414 * We must hunt this association for MBUF's past the cumack (i.e.
6415 * out of order data that we can renege on).
6416 */
6417 struct sctp_association *asoc;
6418 struct sctp_tmit_chunk *chk, *nchk;
6419 uint32_t cumulative_tsn_p1, tsn;
6420 struct sctp_queued_to_read *ctl, *nctl;
6421 int cnt, strmat, gap;
6422
6423 /* We look for anything larger than the cum-ack + 1 */
6424
6425 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6426 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6427 return;
6428 }
6429 asoc = &stcb->asoc;
6430 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6431 /* none we can reneg on. */
6432 return;
6433 }
6434 SCTP_STAT_INCR(sctps_protocol_drains_done);
6435 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6436 cnt = 0;
6437 /* First look in the re-assembly queue */
6438 chk = TAILQ_FIRST(&asoc->reasmqueue);
6439 while (chk) {
6440 /* Get the next one */
6441 nchk = TAILQ_NEXT(chk, sctp_next);
6442 if (compare_with_wrap(chk->rec.data.TSN_seq,
6443 cumulative_tsn_p1, MAX_TSN)) {
6444 /* Yep it is above cum-ack */
6445 cnt++;
6446 tsn = chk->rec.data.TSN_seq;
6447 if (tsn >= asoc->mapping_array_base_tsn) {
6448 gap = tsn - asoc->mapping_array_base_tsn;
6449 } else {
6450 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6451 tsn + 1;
6452 }
6453 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6454 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6455 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6456 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6457 if (chk->data) {
6458 sctp_m_freem(chk->data);
6459 chk->data = NULL;
6460 }
6461 sctp_free_a_chunk(stcb, chk);
6462 }
6463 chk = nchk;
6464 }
6465 /* Ok that was fun, now we will drain all the inbound streams? */
6466 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6467 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6468 while (ctl) {
6469 nctl = TAILQ_NEXT(ctl, next);
6470 if (compare_with_wrap(ctl->sinfo_tsn,
6471 cumulative_tsn_p1, MAX_TSN)) {
6472 /* Yep it is above cum-ack */
6473 cnt++;
6474 tsn = ctl->sinfo_tsn;
6475 if (tsn >= asoc->mapping_array_base_tsn) {
6476 gap = tsn -
6477 asoc->mapping_array_base_tsn;
6478 } else {
6479 gap = (MAX_TSN -
6480 asoc->mapping_array_base_tsn) +
6481 tsn + 1;
6482 }
6483 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6484 sctp_ucount_decr(asoc->cnt_on_all_streams);
6485
6486 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
6487 gap);
6488 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
6489 ctl, next);
6490 if (ctl->data) {
6491 sctp_m_freem(ctl->data);
6492 ctl->data = NULL;
6493 }
6494 sctp_free_remote_addr(ctl->whoFrom);
6495 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6496 SCTP_DECR_READQ_COUNT();
6497 }
6498 ctl = nctl;
6499 }
6500 }
6501 /*
6502 * Question, should we go through the delivery queue? The only
6503 * reason things are on here is the app not reading OR a p-d-api up.
6504 * An attacker COULD send enough in to initiate the PD-API and then
6505 * send a bunch of stuff to other streams... these would wind up on
6506 * the delivery queue.. and then we would not get to them. But in
6507 * order to do this I then have to back-track and un-deliver
6508 * sequence numbers in streams.. el-yucko. I think for now we will
6509 * NOT look at the delivery queue and leave it to be something to
6510 * consider later. An alternative would be to abort the P-D-API with
6511 * a notification and then deliver the data.... Or another method
6512 * might be to keep track of how many times the situation occurs and
6513 * if we see a possible attack underway just abort the association.
6514 */
6515#ifdef SCTP_DEBUG
6516 if (cnt) {
6517 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6518 }
6519#endif
6520 if (cnt) {
6521 /*
6522 * Now do we need to find a new
6523 * asoc->highest_tsn_inside_map?
6524 */
6525 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6526 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6527 } else {
6528 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6529 asoc->highest_tsn_inside_map + 1;
6530 }
6531 if (gap >= (asoc->mapping_array_size << 3)) {
6532 /*
6533 * Something bad happened or cum-ack and high were
6534 * behind the base, but if so earlier checks should
6535 * have found NO data... wierd... we will start at
6536 * end of mapping array.
6537 */
6538 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6539 (int)gap,
6540 (int)(asoc->mapping_array_size << 3),
6541 (int)asoc->highest_tsn_inside_map);
6542 gap = asoc->mapping_array_size << 3;
6543 }
6544 while (gap > 0) {
6545 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6546 /* found the new highest */
6547 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6548 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6549 sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6550 }
6551 break;
6552 }
6553 gap--;
6554 }
6555 if (gap == 0) {
6556 /* Nothing left in map */
6557 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6558 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6559 asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6560 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6561 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6562 }
6563 }
6564 asoc->last_revoke_count = cnt;
6565 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6566 /* sa_ignore NO_NULL_CHK */
6567 sctp_send_sack(stcb);
6568 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6569 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6570 reneged_at++;
6571 }
6572 /*
6573 * Another issue, in un-setting the TSN's in the mapping array we
6574 * DID NOT adjust the higest_tsn marker. This will cause one of two
6575 * things to occur. It may cause us to do extra work in checking for
6576 * our mapping array movement. More importantly it may cause us to
6577 * SACK every datagram. This may not be a bad thing though since we
6578 * will recover once we get our cum-ack above and all this stuff we
6579 * dumped recovered.
6580 */
6581}
6582
6583void
6584sctp_drain()
6585{
6586 /*
6587 * We must walk the PCB lists for ALL associations here. The system
6588 * is LOW on MBUF's and needs help. This is where reneging will
6589 * occur. We really hope this does NOT happen!
6590 */
6591 struct sctp_inpcb *inp;
6592 struct sctp_tcb *stcb;
6593
6594 SCTP_INP_INFO_RLOCK();
6595 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6596 /* For each endpoint */
6597 SCTP_INP_RLOCK(inp);
6598 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6599 /* For each association */
6600 SCTP_TCB_LOCK(stcb);
6601 sctp_drain_mbufs(inp, stcb);
6602 SCTP_TCB_UNLOCK(stcb);
6603 }
6604 SCTP_INP_RUNLOCK(inp);
6605 }
6606 SCTP_INP_INFO_RUNLOCK();
6607}
6608
6609/*
6610 * start a new iterator
6611 * iterates through all endpoints and associations based on the pcb_state
6612 * flags and asoc_state. "af" (mandatory) is executed for all matching
6613 * assocs and "ef" (optional) is executed when the iterator completes.
6614 * "inpf" (optional) is executed for each new endpoint as it is being
6615 * iterated through. inpe (optional) is called when the inp completes
6616 * its way through all the stcbs.
6617 */
6618int
6619sctp_initiate_iterator(inp_func inpf,
6620 asoc_func af,
6621 inp_func inpe,
6622 uint32_t pcb_state,
6623 uint32_t pcb_features,
6624 uint32_t asoc_state,
6625 void *argp,
6626 uint32_t argi,
6627 end_func ef,
6628 struct sctp_inpcb *s_inp,
6629 uint8_t chunk_output_off)
6630{
6631 struct sctp_iterator *it = NULL;
6632
6633 if (af == NULL) {
6634 return (-1);
6635 }
6636 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6637 SCTP_M_ITER);
6638 if (it == NULL) {
6639 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6640 return (ENOMEM);
6641 }
6642 memset(it, 0, sizeof(*it));
6643 it->function_assoc = af;
6644 it->function_inp = inpf;
6645 if (inpf)
6646 it->done_current_ep = 0;
6647 else
6648 it->done_current_ep = 1;
6649 it->function_atend = ef;
6650 it->pointer = argp;
6651 it->val = argi;
6652 it->pcb_flags = pcb_state;
6653 it->pcb_features = pcb_features;
6654 it->asoc_state = asoc_state;
6655 it->function_inp_end = inpe;
6656 it->no_chunk_output = chunk_output_off;
6657 if (s_inp) {
6658 it->inp = s_inp;
6659 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6660 } else {
6661 SCTP_INP_INFO_RLOCK();
6662 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6663
6664 SCTP_INP_INFO_RUNLOCK();
6665 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6666
6667 }
6668 SCTP_IPI_ITERATOR_WQ_LOCK();
6669 if (it->inp) {
6670 SCTP_INP_INCR_REF(it->inp);
6671 }
6672 TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr);
6673#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6674 if (SCTP_BASE_INFO(iterator_running) == 0) {
6675 sctp_wakeup_iterator();
6676 }
6677 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6678#else
6679 if (it->inp)
6680 SCTP_INP_DECR_REF(it->inp);
6681 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6682 /* Init the timer */
6683 SCTP_OS_TIMER_INIT(&it->tmr.timer);
6684 /* add to the list of all iterators */
6685 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6686 NULL, NULL);
6687#endif
6688 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6689 return (0);
6690}
| 3760 sin6->sin6_scope_id = 0;
3761 }
3762#endif
3763 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3764
3765 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3766 /* Get source address */
3767 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3768 stcb,
3769 (sctp_route_t *) & net->ro,
3770 net,
3771 0,
3772 stcb->asoc.vrf_id);
3773 /* Now get the interface MTU */
3774 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3775 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3776 } else {
3777 net->mtu = 0;
3778 }
3779#ifdef SCTP_PRINT_FOR_B_AND_M
3780 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3781#endif
3782 if (net->mtu == 0) {
3783 /* Huh ?? */
3784 net->mtu = SCTP_DEFAULT_MTU;
3785 } else {
3786 uint32_t rmtu;
3787
3788 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3789#ifdef SCTP_PRINT_FOR_B_AND_M
3790 SCTP_PRINTF("The route mtu is %d\n", rmtu);
3791#endif
3792 if (rmtu == 0) {
3793 /*
3794 * Start things off to match mtu of
3795 * interface please.
3796 */
3797 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3798 net->ro.ro_rt, net->mtu);
3799 } else {
3800 /*
3801 * we take the route mtu over the interface,
3802 * since the route may be leading out the
3803 * loopback, or a different interface.
3804 */
3805 net->mtu = rmtu;
3806 }
3807 }
3808 if (from == SCTP_ALLOC_ASOC) {
3809#ifdef SCTP_PRINT_FOR_B_AND_M
3810 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3811#endif
3812 stcb->asoc.smallest_mtu = net->mtu;
3813 }
3814 } else {
3815 net->mtu = stcb->asoc.smallest_mtu;
3816 }
3817#ifdef INET6
3818 if (newaddr->sa_family == AF_INET6) {
3819 struct sockaddr_in6 *sin6;
3820
3821 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3822 (void)sa6_recoverscope(sin6);
3823 }
3824#endif
3825 if (net->port) {
3826 net->mtu -= sizeof(struct udphdr);
3827 }
3828 if (stcb->asoc.smallest_mtu > net->mtu) {
3829#ifdef SCTP_PRINT_FOR_B_AND_M
3830 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3831 net->mtu, stcb->asoc.smallest_mtu);
3832#endif
3833 stcb->asoc.smallest_mtu = net->mtu;
3834 }
3835 /* JRS - Use the congestion control given in the CC module */
3836 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3837
3838 /*
3839 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3840 * of assoc (2005/06/27, iyengar@cis.udel.edu)
3841 */
3842 net->find_pseudo_cumack = 1;
3843 net->find_rtx_pseudo_cumack = 1;
3844 net->src_addr_selected = 0;
3845 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3846 if (net->ro.ro_rt == NULL) {
3847 /* Since we have no route put it at the back */
3848 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3849 } else if (netfirst == NULL) {
3850 /* We are the first one in the pool. */
3851 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3852 } else if (netfirst->ro.ro_rt == NULL) {
3853 /*
3854 * First one has NO route. Place this one ahead of the first
3855 * one.
3856 */
3857 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3858 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3859 /*
3860 * This one has a different interface than the one at the
3861 * top of the list. Place it ahead.
3862 */
3863 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3864 } else {
3865 /*
3866 * Ok we have the same interface as the first one. Move
3867 * forward until we find either a) one with a NULL route...
3868 * insert ahead of that b) one with a different ifp.. insert
3869 * after that. c) end of the list.. insert at the tail.
3870 */
3871 struct sctp_nets *netlook;
3872
3873 do {
3874 netlook = TAILQ_NEXT(netfirst, sctp_next);
3875 if (netlook == NULL) {
3876 /* End of the list */
3877 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3878 break;
3879 } else if (netlook->ro.ro_rt == NULL) {
3880 /* next one has NO route */
3881 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3882 break;
3883 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3884 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3885 net, sctp_next);
3886 break;
3887 }
3888 /* Shift forward */
3889 netfirst = netlook;
3890 } while (netlook != NULL);
3891 }
3892
3893 /* got to have a primary set */
3894 if (stcb->asoc.primary_destination == 0) {
3895 stcb->asoc.primary_destination = net;
3896 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3897 (net->ro.ro_rt) &&
3898 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3899 /* No route to current primary adopt new primary */
3900 stcb->asoc.primary_destination = net;
3901 }
3902 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3903 net);
3904 /* Validate primary is first */
3905 net = TAILQ_FIRST(&stcb->asoc.nets);
3906 if ((net != stcb->asoc.primary_destination) &&
3907 (stcb->asoc.primary_destination)) {
3908 /*
3909 * first one on the list is NOT the primary sctp_cmpaddr()
3910 * is much more efficent if the primary is the first on the
3911 * list, make it so.
3912 */
3913 TAILQ_REMOVE(&stcb->asoc.nets,
3914 stcb->asoc.primary_destination, sctp_next);
3915 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3916 stcb->asoc.primary_destination, sctp_next);
3917 }
3918 return (0);
3919}
3920
3921
3922static uint32_t
3923sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3924{
3925 uint32_t id;
3926 struct sctpasochead *head;
3927 struct sctp_tcb *lstcb;
3928
3929 SCTP_INP_WLOCK(inp);
3930try_again:
3931 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3932 /* TSNH */
3933 SCTP_INP_WUNLOCK(inp);
3934 return (0);
3935 }
3936 /*
3937 * We don't allow assoc id to be 0, this is needed otherwise if the
3938 * id were to wrap we would have issues with some socket options.
3939 */
3940 if (inp->sctp_associd_counter == 0) {
3941 inp->sctp_associd_counter++;
3942 }
3943 id = inp->sctp_associd_counter;
3944 inp->sctp_associd_counter++;
3945 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
3946 if (lstcb) {
3947 goto try_again;
3948 }
3949 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
3950 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
3951 stcb->asoc.in_asocid_hash = 1;
3952 SCTP_INP_WUNLOCK(inp);
3953 return id;
3954}
3955
3956/*
3957 * allocate an association and add it to the endpoint. The caller must be
3958 * careful to add all additional addresses once they are know right away or
3959 * else the assoc will be may experience a blackout scenario.
3960 */
3961struct sctp_tcb *
3962sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3963 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3964 struct thread *p
3965)
3966{
3967 /* note the p argument is only valid in unbound sockets */
3968
3969 struct sctp_tcb *stcb;
3970 struct sctp_association *asoc;
3971 struct sctpasochead *head;
3972 uint16_t rport;
3973 int err;
3974
3975 /*
3976 * Assumption made here: Caller has done a
3977 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3978 * address does not exist already.
3979 */
3980 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
3981 /* Hit max assoc, sorry no more */
3982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3983 *error = ENOBUFS;
3984 return (NULL);
3985 }
3986 if (firstaddr == NULL) {
3987 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3988 *error = EINVAL;
3989 return (NULL);
3990 }
3991 SCTP_INP_RLOCK(inp);
3992 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
3993 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
3994 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
3995 /*
3996 * If its in the TCP pool, its NOT allowed to create an
3997 * association. The parent listener needs to call
3998 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3999 * off, or connected one does this.. its an error.
4000 */
4001 SCTP_INP_RUNLOCK(inp);
4002 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4003 *error = EINVAL;
4004 return (NULL);
4005 }
4006 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4007#ifdef SCTP_DEBUG
4008 if (firstaddr) {
4009 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4010 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4011 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4012 } else {
4013 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4014 }
4015#endif /* SCTP_DEBUG */
4016 if (firstaddr->sa_family == AF_INET) {
4017 struct sockaddr_in *sin;
4018
4019 sin = (struct sockaddr_in *)firstaddr;
4020 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4021 /* Invalid address */
4022 SCTP_INP_RUNLOCK(inp);
4023 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4024 *error = EINVAL;
4025 return (NULL);
4026 }
4027 rport = sin->sin_port;
4028 } else if (firstaddr->sa_family == AF_INET6) {
4029 struct sockaddr_in6 *sin6;
4030
4031 sin6 = (struct sockaddr_in6 *)firstaddr;
4032 if ((sin6->sin6_port == 0) ||
4033 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4034 /* Invalid address */
4035 SCTP_INP_RUNLOCK(inp);
4036 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4037 *error = EINVAL;
4038 return (NULL);
4039 }
4040 rport = sin6->sin6_port;
4041 } else {
4042 /* not supported family type */
4043 SCTP_INP_RUNLOCK(inp);
4044 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4045 *error = EINVAL;
4046 return (NULL);
4047 }
4048 SCTP_INP_RUNLOCK(inp);
4049 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4050 /*
4051 * If you have not performed a bind, then we need to do the
4052 * ephemerial bind for you.
4053 */
4054 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4055 (struct sockaddr *)NULL,
4056 (struct sctp_ifa *)NULL,
4057 p
4058 ))) {
4059 /* bind error, probably perm */
4060 *error = err;
4061 return (NULL);
4062 }
4063 }
4064 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4065 if (stcb == NULL) {
4066 /* out of memory? */
4067 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4068 *error = ENOMEM;
4069 return (NULL);
4070 }
4071 SCTP_INCR_ASOC_COUNT();
4072
4073 bzero(stcb, sizeof(*stcb));
4074 asoc = &stcb->asoc;
4075
4076 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4077 SCTP_TCB_LOCK_INIT(stcb);
4078 SCTP_TCB_SEND_LOCK_INIT(stcb);
4079 stcb->rport = rport;
4080 /* setup back pointer's */
4081 stcb->sctp_ep = inp;
4082 stcb->sctp_socket = inp->sctp_socket;
4083 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
4084 /* failed */
4085 SCTP_TCB_LOCK_DESTROY(stcb);
4086 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4087 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4088 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4089 SCTP_DECR_ASOC_COUNT();
4090 *error = err;
4091 return (NULL);
4092 }
4093 /* and the port */
4094 SCTP_INP_INFO_WLOCK();
4095 SCTP_INP_WLOCK(inp);
4096 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4097 /* inpcb freed while alloc going on */
4098 SCTP_TCB_LOCK_DESTROY(stcb);
4099 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4100 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4101 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4102 SCTP_INP_WUNLOCK(inp);
4103 SCTP_INP_INFO_WUNLOCK();
4104 SCTP_DECR_ASOC_COUNT();
4105 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4106 *error = EINVAL;
4107 return (NULL);
4108 }
4109 SCTP_TCB_LOCK(stcb);
4110
4111 /* now that my_vtag is set, add it to the hash */
4112 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4113 /* put it in the bucket in the vtag hash of assoc's for the system */
4114 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4115 SCTP_INP_INFO_WUNLOCK();
4116
4117 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4118 /* failure.. memory error? */
4119 if (asoc->strmout) {
4120 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4121 asoc->strmout = NULL;
4122 }
4123 if (asoc->mapping_array) {
4124 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4125 asoc->mapping_array = NULL;
4126 }
4127 if (asoc->nr_mapping_array) {
4128 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4129 asoc->nr_mapping_array = NULL;
4130 }
4131 SCTP_DECR_ASOC_COUNT();
4132 SCTP_TCB_LOCK_DESTROY(stcb);
4133 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4134 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4135 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4136 SCTP_INP_WUNLOCK(inp);
4137 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4138 *error = ENOBUFS;
4139 return (NULL);
4140 }
4141 /* Init all the timers */
4142 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4143 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4144 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4145 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4146 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4147 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4148 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4149 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4150
4151 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4152 /* now file the port under the hash as well */
4153 if (inp->sctp_tcbhash != NULL) {
4154 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4155 inp->sctp_hashmark)];
4156 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4157 }
4158 SCTP_INP_WUNLOCK(inp);
4159 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4160 return (stcb);
4161}
4162
4163
4164void
4165sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4166{
4167 struct sctp_association *asoc;
4168
4169 asoc = &stcb->asoc;
4170 asoc->numnets--;
4171 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4172 if (net == asoc->primary_destination) {
4173 /* Reset primary */
4174 struct sctp_nets *lnet;
4175
4176 lnet = TAILQ_FIRST(&asoc->nets);
4177 /*
4178 * Mobility adaptation Ideally, if deleted destination is
4179 * the primary, it becomes a fast retransmission trigger by
4180 * the subsequent SET PRIMARY. (by micchie)
4181 */
4182 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4183 SCTP_MOBILITY_BASE) ||
4184 sctp_is_mobility_feature_on(stcb->sctp_ep,
4185 SCTP_MOBILITY_FASTHANDOFF)) {
4186 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4187 if (asoc->deleted_primary != NULL) {
4188 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4189 goto out;
4190 }
4191 asoc->deleted_primary = net;
4192 atomic_add_int(&net->ref_count, 1);
4193 memset(&net->lastsa, 0, sizeof(net->lastsa));
4194 memset(&net->lastsv, 0, sizeof(net->lastsv));
4195 sctp_mobility_feature_on(stcb->sctp_ep,
4196 SCTP_MOBILITY_PRIM_DELETED);
4197 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4198 stcb->sctp_ep, stcb, NULL);
4199 }
4200out:
4201 /* Try to find a confirmed primary */
4202 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4203 }
4204 if (net == asoc->last_data_chunk_from) {
4205 /* Reset primary */
4206 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4207 }
4208 if (net == asoc->last_control_chunk_from) {
4209 /* Clear net */
4210 asoc->last_control_chunk_from = NULL;
4211 }
4212 sctp_free_remote_addr(net);
4213}
4214
4215/*
4216 * remove a remote endpoint address from an association, it will fail if the
4217 * address does not exist.
4218 */
4219int
4220sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4221{
4222 /*
4223 * Here we need to remove a remote address. This is quite simple, we
4224 * first find it in the list of address for the association
4225 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4226 * on that item. Note we do not allow it to be removed if there are
4227 * no other addresses.
4228 */
4229 struct sctp_association *asoc;
4230 struct sctp_nets *net, *net_tmp;
4231
4232 asoc = &stcb->asoc;
4233
4234 /* locate the address */
4235 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4236 net_tmp = TAILQ_NEXT(net, sctp_next);
4237 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4238 continue;
4239 }
4240 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4241 remaddr)) {
4242 /* we found the guy */
4243 if (asoc->numnets < 2) {
4244 /* Must have at LEAST two remote addresses */
4245 return (-1);
4246 } else {
4247 sctp_remove_net(stcb, net);
4248 return (0);
4249 }
4250 }
4251 }
4252 /* not found. */
4253 return (-2);
4254}
4255
4256void
4257sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4258{
4259 struct sctpvtaghead *chain;
4260 struct sctp_tagblock *twait_block;
4261 int found = 0;
4262 int i;
4263
4264 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4265 if (!SCTP_LIST_EMPTY(chain)) {
4266 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4267 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4268 if ((twait_block->vtag_block[i].v_tag == tag) &&
4269 (twait_block->vtag_block[i].lport == lport) &&
4270 (twait_block->vtag_block[i].rport == rport)) {
4271 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4272 twait_block->vtag_block[i].v_tag = 0;
4273 twait_block->vtag_block[i].lport = 0;
4274 twait_block->vtag_block[i].rport = 0;
4275 found = 1;
4276 break;
4277 }
4278 }
4279 if (found)
4280 break;
4281 }
4282 }
4283}
4284
4285int
4286sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4287{
4288 struct sctpvtaghead *chain;
4289 struct sctp_tagblock *twait_block;
4290 int found = 0;
4291 int i;
4292
4293 SCTP_INP_INFO_WLOCK();
4294 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4295 if (!SCTP_LIST_EMPTY(chain)) {
4296 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4297 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4298 if ((twait_block->vtag_block[i].v_tag == tag) &&
4299 (twait_block->vtag_block[i].lport == lport) &&
4300 (twait_block->vtag_block[i].rport == rport)) {
4301 found = 1;
4302 break;
4303 }
4304 }
4305 if (found)
4306 break;
4307 }
4308 }
4309 SCTP_INP_INFO_WUNLOCK();
4310 return (found);
4311}
4312
4313
4314void
4315sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4316{
4317 struct sctpvtaghead *chain;
4318 struct sctp_tagblock *twait_block;
4319 struct timeval now;
4320 int set, i;
4321
4322 if (time == 0) {
4323 /* Its disabled */
4324 return;
4325 }
4326 (void)SCTP_GETTIME_TIMEVAL(&now);
4327 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4328 set = 0;
4329 if (!SCTP_LIST_EMPTY(chain)) {
4330 /* Block(s) present, lets find space, and expire on the fly */
4331 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4332 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4333 if ((twait_block->vtag_block[i].v_tag == 0) &&
4334 !set) {
4335 twait_block->vtag_block[i].tv_sec_at_expire =
4336 now.tv_sec + time;
4337 twait_block->vtag_block[i].v_tag = tag;
4338 twait_block->vtag_block[i].lport = lport;
4339 twait_block->vtag_block[i].rport = rport;
4340 set = 1;
4341 } else if ((twait_block->vtag_block[i].v_tag) &&
4342 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4343 /* Audit expires this guy */
4344 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4345 twait_block->vtag_block[i].v_tag = 0;
4346 twait_block->vtag_block[i].lport = 0;
4347 twait_block->vtag_block[i].rport = 0;
4348 if (set == 0) {
4349 /* Reuse it for my new tag */
4350 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4351 twait_block->vtag_block[i].v_tag = tag;
4352 twait_block->vtag_block[i].lport = lport;
4353 twait_block->vtag_block[i].rport = rport;
4354 set = 1;
4355 }
4356 }
4357 }
4358 if (set) {
4359 /*
4360 * We only do up to the block where we can
4361 * place our tag for audits
4362 */
4363 break;
4364 }
4365 }
4366 }
4367 /* Need to add a new block to chain */
4368 if (!set) {
4369 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4370 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4371 if (twait_block == NULL) {
4372#ifdef INVARIANTS
4373 panic("Can not alloc tagblock");
4374#endif
4375 return;
4376 }
4377 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4378 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4379 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4380 twait_block->vtag_block[0].v_tag = tag;
4381 twait_block->vtag_block[0].lport = lport;
4382 twait_block->vtag_block[0].rport = rport;
4383 }
4384}
4385
4386
4387static void
4388sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4389{
4390 struct sctp_iterator *it;
4391
4392 /*
4393 * Unlock the tcb lock we do this so we avoid a dead lock scenario
4394 * where the iterator is waiting on the TCB lock and the TCB lock is
4395 * waiting on the iterator lock.
4396 */
4397 it = stcb->asoc.stcb_starting_point_for_iterator;
4398 if (it == NULL) {
4399 return;
4400 }
4401 if (it->inp != stcb->sctp_ep) {
4402 /* hmm, focused on the wrong one? */
4403 return;
4404 }
4405 if (it->stcb != stcb) {
4406 return;
4407 }
4408 it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4409 if (it->stcb == NULL) {
4410 /* done with all asoc's in this assoc */
4411 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4412 it->inp = NULL;
4413 } else {
4414 it->inp = LIST_NEXT(inp, sctp_list);
4415 }
4416 }
4417}
4418
4419
4420/*-
4421 * Free the association after un-hashing the remote port. This
4422 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4423 * expect that the input to this function IS a locked TCB.
4424 * It will return 0, if it did NOT destroy the association (instead
4425 * it unlocks it. It will return NON-zero if it either destroyed the
4426 * association OR the association is already destroyed.
4427 */
4428int
4429sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4430{
4431 int i;
4432 struct sctp_association *asoc;
4433 struct sctp_nets *net, *prev;
4434 struct sctp_laddr *laddr;
4435 struct sctp_tmit_chunk *chk;
4436 struct sctp_asconf_addr *aparam;
4437 struct sctp_asconf_ack *aack;
4438 struct sctp_stream_reset_list *liste;
4439 struct sctp_queued_to_read *sq;
4440 struct sctp_stream_queue_pending *sp;
4441 sctp_sharedkey_t *shared_key;
4442 struct socket *so;
4443 int ccnt = 0;
4444 int cnt = 0;
4445
4446 /* first, lets purge the entry from the hash table. */
4447
4448#ifdef SCTP_LOG_CLOSING
4449 sctp_log_closing(inp, stcb, 6);
4450#endif
4451 if (stcb->asoc.state == 0) {
4452#ifdef SCTP_LOG_CLOSING
4453 sctp_log_closing(inp, NULL, 7);
4454#endif
4455 /* there is no asoc, really TSNH :-0 */
4456 return (1);
4457 }
4458 /* TEMP CODE */
4459 if (stcb->freed_from_where == 0) {
4460 /* Only record the first place free happened from */
4461 stcb->freed_from_where = from_location;
4462 }
4463 /* TEMP CODE */
4464
4465 asoc = &stcb->asoc;
4466 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4467 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4468 /* nothing around */
4469 so = NULL;
4470 else
4471 so = inp->sctp_socket;
4472
4473 /*
4474 * We used timer based freeing if a reader or writer is in the way.
4475 * So we first check if we are actually being called from a timer,
4476 * if so we abort early if a reader or writer is still in the way.
4477 */
4478 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4479 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4480 /*
4481 * is it the timer driving us? if so are the reader/writers
4482 * gone?
4483 */
4484 if (stcb->asoc.refcnt) {
4485 /* nope, reader or writer in the way */
4486 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4487 /* no asoc destroyed */
4488 SCTP_TCB_UNLOCK(stcb);
4489#ifdef SCTP_LOG_CLOSING
4490 sctp_log_closing(inp, stcb, 8);
4491#endif
4492 return (0);
4493 }
4494 }
4495 /* now clean up any other timers */
4496 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4497 asoc->hb_timer.self = NULL;
4498 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4499 asoc->dack_timer.self = NULL;
4500 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4501 /*-
4502 * For stream reset we don't blast this unless
4503 * it is a str-reset timer, it might be the
4504 * free-asoc timer which we DON'T want to
4505 * disturb.
4506 */
4507 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4508 asoc->strreset_timer.self = NULL;
4509 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4510 asoc->asconf_timer.self = NULL;
4511 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4512 asoc->autoclose_timer.self = NULL;
4513 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4514 asoc->shut_guard_timer.self = NULL;
4515 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4516 asoc->delayed_event_timer.self = NULL;
4517 /* Mobility adaptation */
4518 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4519 asoc->delete_prim_timer.self = NULL;
4520 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4521 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4522 net->fr_timer.self = NULL;
4523 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4524 net->rxt_timer.self = NULL;
4525 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4526 net->pmtu_timer.self = NULL;
4527 }
4528 /* Now the read queue needs to be cleaned up (only once) */
4529 cnt = 0;
4530 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4531 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4532 SCTP_INP_READ_LOCK(inp);
4533 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4534 if (sq->stcb == stcb) {
4535 sq->do_not_ref_stcb = 1;
4536 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4537 /*
4538 * If there is no end, there never will be
4539 * now.
4540 */
4541 if (sq->end_added == 0) {
4542 /* Held for PD-API clear that. */
4543 sq->pdapi_aborted = 1;
4544 sq->held_length = 0;
4545 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4546 /*
4547 * Need to add a PD-API
4548 * aborted indication.
4549 * Setting the control_pdapi
4550 * assures that it will be
4551 * added right after this
4552 * msg.
4553 */
4554 uint32_t strseq;
4555
4556 stcb->asoc.control_pdapi = sq;
4557 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4558 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4559 stcb,
4560 SCTP_PARTIAL_DELIVERY_ABORTED,
4561 (void *)&strseq,
4562 SCTP_SO_LOCKED);
4563 stcb->asoc.control_pdapi = NULL;
4564 }
4565 }
4566 /* Add an end to wake them */
4567 sq->end_added = 1;
4568 cnt++;
4569 }
4570 }
4571 SCTP_INP_READ_UNLOCK(inp);
4572 if (stcb->block_entry) {
4573 cnt++;
4574 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4575 stcb->block_entry->error = ECONNRESET;
4576 stcb->block_entry = NULL;
4577 }
4578 }
4579 if (stcb->asoc.refcnt) {
4580 /*
4581 * reader or writer in the way, we have hopefully given him
4582 * something to chew on above.
4583 */
4584 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4585 SCTP_TCB_UNLOCK(stcb);
4586 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4587 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4588 /* nothing around */
4589 so = NULL;
4590 if (so) {
4591 /* Wake any reader/writers */
4592 sctp_sorwakeup(inp, so);
4593 sctp_sowwakeup(inp, so);
4594 }
4595#ifdef SCTP_LOG_CLOSING
4596 sctp_log_closing(inp, stcb, 9);
4597#endif
4598 /* no asoc destroyed */
4599 return (0);
4600 }
4601#ifdef SCTP_LOG_CLOSING
4602 sctp_log_closing(inp, stcb, 10);
4603#endif
4604 /*
4605 * When I reach here, no others want to kill the assoc yet.. and I
4606 * own the lock. Now its possible an abort comes in when I do the
4607 * lock exchange below to grab all the locks to do the final take
4608 * out. to prevent this we increment the count, which will start a
4609 * timer and blow out above thus assuring us that we hold exclusive
4610 * killing of the asoc. Note that after getting back the TCB lock we
4611 * will go ahead and increment the counter back up and stop any
4612 * timer a passing stranger may have started :-S
4613 */
4614 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4615 atomic_add_int(&stcb->asoc.refcnt, 1);
4616
4617 SCTP_TCB_UNLOCK(stcb);
4618
4619 SCTP_ITERATOR_LOCK();
4620 SCTP_INP_INFO_WLOCK();
4621 SCTP_INP_WLOCK(inp);
4622 SCTP_TCB_LOCK(stcb);
4623 }
4624 /* Double check the GONE flag */
4625 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4626 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4627 /* nothing around */
4628 so = NULL;
4629
4630 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4631 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4632 /*
4633 * For TCP type we need special handling when we are
4634 * connected. We also include the peel'ed off ones to.
4635 */
4636 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4637 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4638 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4639 if (so) {
4640 SOCK_LOCK(so);
4641 if (so->so_rcv.sb_cc == 0) {
4642 so->so_state &= ~(SS_ISCONNECTING |
4643 SS_ISDISCONNECTING |
4644 SS_ISCONFIRMING |
4645 SS_ISCONNECTED);
4646 }
4647 SOCK_UNLOCK(so);
4648 socantrcvmore(so);
4649 sctp_sowwakeup(inp, so);
4650 sctp_sorwakeup(inp, so);
4651 SCTP_SOWAKEUP(so);
4652 }
4653 }
4654 }
4655 /*
4656 * Make it invalid too, that way if its about to run it will abort
4657 * and return.
4658 */
4659 sctp_iterator_asoc_being_freed(inp, stcb);
4660 /* re-increment the lock */
4661 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4662 atomic_add_int(&stcb->asoc.refcnt, -1);
4663 }
4664 asoc->state = 0;
4665 if (inp->sctp_tcbhash) {
4666 LIST_REMOVE(stcb, sctp_tcbhash);
4667 }
4668 if (stcb->asoc.in_asocid_hash) {
4669 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4670 }
4671 /* Now lets remove it from the list of ALL associations in the EP */
4672 LIST_REMOVE(stcb, sctp_tcblist);
4673 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4674 SCTP_INP_INCR_REF(inp);
4675 SCTP_INP_WUNLOCK(inp);
4676 SCTP_ITERATOR_UNLOCK();
4677 }
4678 /* pull from vtag hash */
4679 LIST_REMOVE(stcb, sctp_asocs);
4680 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4681 inp->sctp_lport, stcb->rport);
4682
4683 /*
4684 * Now restop the timers to be sure - this is paranoia at is finest!
4685 */
4686 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4687 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4688 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4689 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4690 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4691 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4692 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4693 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4694 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4695 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4696 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4697 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4698 }
4699
4700 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4701 prev = NULL;
4702 /*
4703 * The chunk lists and such SHOULD be empty but we check them just
4704 * in case.
4705 */
4706 /* anything on the wheel needs to be removed */
4707 for (i = 0; i < asoc->streamoutcnt; i++) {
4708 struct sctp_stream_out *outs;
4709
4710 outs = &asoc->strmout[i];
4711 /* now clean up any chunks here */
4712 sp = TAILQ_FIRST(&outs->outqueue);
4713 while (sp) {
4714 TAILQ_REMOVE(&outs->outqueue, sp, next);
4715 if (sp->data) {
4716 sctp_m_freem(sp->data);
4717 sp->data = NULL;
4718 sp->tail_mbuf = NULL;
4719 }
4720 sctp_free_remote_addr(sp->net);
4721 sctp_free_spbufspace(stcb, asoc, sp);
4722 if (sp->holds_key_ref)
4723 sctp_auth_key_release(stcb, sp->auth_keyid);
4724 /* Free the zone stuff */
4725 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4726 SCTP_DECR_STRMOQ_COUNT();
4727 /* sa_ignore FREED_MEMORY */
4728 sp = TAILQ_FIRST(&outs->outqueue);
4729 }
4730 }
4731
4732 /* sa_ignore FREED_MEMORY */
4733 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4734 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4735 SCTP_FREE(liste, SCTP_M_STRESET);
4736 }
4737
4738 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4739 while (sq) {
4740 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4741 if (sq->data) {
4742 sctp_m_freem(sq->data);
4743 sq->data = NULL;
4744 }
4745 sctp_free_remote_addr(sq->whoFrom);
4746 sq->whoFrom = NULL;
4747 sq->stcb = NULL;
4748 /* Free the ctl entry */
4749 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4750 SCTP_DECR_READQ_COUNT();
4751 /* sa_ignore FREED_MEMORY */
4752 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4753 }
4754
4755 chk = TAILQ_FIRST(&asoc->free_chunks);
4756 while (chk) {
4757 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4758 if (chk->data) {
4759 sctp_m_freem(chk->data);
4760 chk->data = NULL;
4761 }
4762 if (chk->holds_key_ref)
4763 sctp_auth_key_release(stcb, chk->auth_keyid);
4764 ccnt++;
4765 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4766 SCTP_DECR_CHK_COUNT();
4767 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4768 asoc->free_chunk_cnt--;
4769 /* sa_ignore FREED_MEMORY */
4770 chk = TAILQ_FIRST(&asoc->free_chunks);
4771 }
4772 /* pending send queue SHOULD be empty */
4773 if (!TAILQ_EMPTY(&asoc->send_queue)) {
4774 chk = TAILQ_FIRST(&asoc->send_queue);
4775 while (chk) {
4776 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4777 if (chk->data) {
4778 sctp_m_freem(chk->data);
4779 chk->data = NULL;
4780 }
4781 if (chk->holds_key_ref)
4782 sctp_auth_key_release(stcb, chk->auth_keyid);
4783 ccnt++;
4784 sctp_free_remote_addr(chk->whoTo);
4785 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4786 SCTP_DECR_CHK_COUNT();
4787 /* sa_ignore FREED_MEMORY */
4788 chk = TAILQ_FIRST(&asoc->send_queue);
4789 }
4790 }
4791/*
4792 if (ccnt) {
4793 printf("Freed %d from send_queue\n", ccnt);
4794 ccnt = 0;
4795 }
4796*/
4797 /* sent queue SHOULD be empty */
4798 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4799 chk = TAILQ_FIRST(&asoc->sent_queue);
4800 while (chk) {
4801 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4802 if (chk->data) {
4803 sctp_m_freem(chk->data);
4804 chk->data = NULL;
4805 }
4806 if (chk->holds_key_ref)
4807 sctp_auth_key_release(stcb, chk->auth_keyid);
4808 ccnt++;
4809 sctp_free_remote_addr(chk->whoTo);
4810 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4811 SCTP_DECR_CHK_COUNT();
4812 /* sa_ignore FREED_MEMORY */
4813 chk = TAILQ_FIRST(&asoc->sent_queue);
4814 }
4815 }
4816/*
4817 if (ccnt) {
4818 printf("Freed %d from sent_queue\n", ccnt);
4819 ccnt = 0;
4820 }
4821*/
4822 /* control queue MAY not be empty */
4823 if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4824 chk = TAILQ_FIRST(&asoc->control_send_queue);
4825 while (chk) {
4826 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4827 if (chk->data) {
4828 sctp_m_freem(chk->data);
4829 chk->data = NULL;
4830 }
4831 if (chk->holds_key_ref)
4832 sctp_auth_key_release(stcb, chk->auth_keyid);
4833 ccnt++;
4834 sctp_free_remote_addr(chk->whoTo);
4835 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4836 SCTP_DECR_CHK_COUNT();
4837 /* sa_ignore FREED_MEMORY */
4838 chk = TAILQ_FIRST(&asoc->control_send_queue);
4839 }
4840 }
4841/*
4842 if (ccnt) {
4843 printf("Freed %d from ctrl_queue\n", ccnt);
4844 ccnt = 0;
4845 }
4846*/
4847
4848 /* ASCONF queue MAY not be empty */
4849 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4850 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4851 while (chk) {
4852 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4853 if (chk->data) {
4854 sctp_m_freem(chk->data);
4855 chk->data = NULL;
4856 }
4857 if (chk->holds_key_ref)
4858 sctp_auth_key_release(stcb, chk->auth_keyid);
4859 ccnt++;
4860 sctp_free_remote_addr(chk->whoTo);
4861 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4862 SCTP_DECR_CHK_COUNT();
4863 /* sa_ignore FREED_MEMORY */
4864 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4865 }
4866 }
4867/*
4868 if (ccnt) {
4869 printf("Freed %d from asconf_queue\n", ccnt);
4870 ccnt = 0;
4871 }
4872*/
4873 if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4874 chk = TAILQ_FIRST(&asoc->reasmqueue);
4875 while (chk) {
4876 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4877 if (chk->data) {
4878 sctp_m_freem(chk->data);
4879 chk->data = NULL;
4880 }
4881 if (chk->holds_key_ref)
4882 sctp_auth_key_release(stcb, chk->auth_keyid);
4883 sctp_free_remote_addr(chk->whoTo);
4884 ccnt++;
4885 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4886 SCTP_DECR_CHK_COUNT();
4887 /* sa_ignore FREED_MEMORY */
4888 chk = TAILQ_FIRST(&asoc->reasmqueue);
4889 }
4890 }
4891/*
4892 if (ccnt) {
4893 printf("Freed %d from reasm_queue\n", ccnt);
4894 ccnt = 0;
4895 }
4896*/
4897 if (asoc->mapping_array) {
4898 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4899 asoc->mapping_array = NULL;
4900 }
4901 if (asoc->nr_mapping_array) {
4902 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4903 asoc->nr_mapping_array = NULL;
4904 }
4905 /* the stream outs */
4906 if (asoc->strmout) {
4907 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4908 asoc->strmout = NULL;
4909 }
4910 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
4911 if (asoc->strmin) {
4912 struct sctp_queued_to_read *ctl;
4913
4914 for (i = 0; i < asoc->streamincnt; i++) {
4915 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4916 /* We have somethings on the streamin queue */
4917 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4918 while (ctl) {
4919 TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4920 ctl, next);
4921 sctp_free_remote_addr(ctl->whoFrom);
4922 if (ctl->data) {
4923 sctp_m_freem(ctl->data);
4924 ctl->data = NULL;
4925 }
4926 /*
4927 * We don't free the address here
4928 * since all the net's were freed
4929 * above.
4930 */
4931 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4932 SCTP_DECR_READQ_COUNT();
4933 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4934 }
4935 }
4936 }
4937 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4938 asoc->strmin = NULL;
4939 }
4940 asoc->streamincnt = 0;
4941 while (!TAILQ_EMPTY(&asoc->nets)) {
4942 /* sa_ignore FREED_MEMORY */
4943 net = TAILQ_FIRST(&asoc->nets);
4944 /* pull from list */
4945 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
4946#ifdef INVARIANTS
4947 panic("no net's left alloc'ed, or list points to itself");
4948#endif
4949 break;
4950 }
4951 prev = net;
4952 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4953 sctp_free_remote_addr(net);
4954 }
4955
4956 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4957 /* sa_ignore FREED_MEMORY */
4958 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4959 sctp_remove_laddr(laddr);
4960 }
4961
4962 /* pending asconf (address) parameters */
4963 while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4964 /* sa_ignore FREED_MEMORY */
4965 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4966 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4967 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4968 }
4969 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4970 /* sa_ignore FREED_MEMORY */
4971 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4972 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4973 if (aack->data != NULL) {
4974 sctp_m_freem(aack->data);
4975 }
4976 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
4977 }
4978 /* clean up auth stuff */
4979 if (asoc->local_hmacs)
4980 sctp_free_hmaclist(asoc->local_hmacs);
4981 if (asoc->peer_hmacs)
4982 sctp_free_hmaclist(asoc->peer_hmacs);
4983
4984 if (asoc->local_auth_chunks)
4985 sctp_free_chunklist(asoc->local_auth_chunks);
4986 if (asoc->peer_auth_chunks)
4987 sctp_free_chunklist(asoc->peer_auth_chunks);
4988
4989 sctp_free_authinfo(&asoc->authinfo);
4990
4991 shared_key = LIST_FIRST(&asoc->shared_keys);
4992 while (shared_key) {
4993 LIST_REMOVE(shared_key, next);
4994 sctp_free_sharedkey(shared_key);
4995 /* sa_ignore FREED_MEMORY */
4996 shared_key = LIST_FIRST(&asoc->shared_keys);
4997 }
4998
4999 /* Insert new items here :> */
5000
5001 /* Get rid of LOCK */
5002 SCTP_TCB_LOCK_DESTROY(stcb);
5003 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5004 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5005 SCTP_INP_INFO_WUNLOCK();
5006 SCTP_INP_RLOCK(inp);
5007 }
5008#ifdef SCTP_TRACK_FREED_ASOCS
5009 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5010 /* now clean up the tasoc itself */
5011 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5012 SCTP_DECR_ASOC_COUNT();
5013 } else {
5014 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5015 }
5016#else
5017 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5018 SCTP_DECR_ASOC_COUNT();
5019#endif
5020 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5021 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5022 /*
5023 * If its NOT the inp_free calling us AND sctp_close
5024 * as been called, we call back...
5025 */
5026 SCTP_INP_RUNLOCK(inp);
5027 /*
5028 * This will start the kill timer (if we are the
5029 * lastone) since we hold an increment yet. But this
5030 * is the only safe way to do this since otherwise
5031 * if the socket closes at the same time we are here
5032 * we might collide in the cleanup.
5033 */
5034 sctp_inpcb_free(inp,
5035 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5036 SCTP_CALLED_DIRECTLY_NOCMPSET);
5037 SCTP_INP_DECR_REF(inp);
5038 goto out_of;
5039 } else {
5040 /* The socket is still open. */
5041 SCTP_INP_DECR_REF(inp);
5042 }
5043 }
5044 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5045 SCTP_INP_RUNLOCK(inp);
5046 }
5047out_of:
5048 /* destroyed the asoc */
5049#ifdef SCTP_LOG_CLOSING
5050 sctp_log_closing(inp, NULL, 11);
5051#endif
5052 return (1);
5053}
5054
5055
5056
5057/*
5058 * determine if a destination is "reachable" based upon the addresses bound
5059 * to the current endpoint (e.g. only v4 or v6 currently bound)
5060 */
5061/*
5062 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5063 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5064 * types bound as its endpoint
5065 */
5066int
5067sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5068{
5069 struct sctp_inpcb *inp;
5070 int answer;
5071
5072 /*
5073 * No locks here, the TCB, in all cases is already locked and an
5074 * assoc is up. There is either a INP lock by the caller applied (in
5075 * asconf case when deleting an address) or NOT in the HB case,
5076 * however if HB then the INP increment is up and the INP will not
5077 * be removed (on top of the fact that we have a TCB lock). So we
5078 * only want to read the sctp_flags, which is either bound-all or
5079 * not.. no protection needed since once an assoc is up you can't be
5080 * changing your binding.
5081 */
5082 inp = stcb->sctp_ep;
5083 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5084 /* if bound all, destination is not restricted */
5085 /*
5086 * RRS: Question during lock work: Is this correct? If you
5087 * are bound-all you still might need to obey the V4--V6
5088 * flags??? IMO this bound-all stuff needs to be removed!
5089 */
5090 return (1);
5091 }
5092 /* NOTE: all "scope" checks are done when local addresses are added */
5093 if (destaddr->sa_family == AF_INET6) {
5094 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5095 } else if (destaddr->sa_family == AF_INET) {
5096 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5097 } else {
5098 /* invalid family, so it's unreachable */
5099 answer = 0;
5100 }
5101 return (answer);
5102}
5103
5104/*
5105 * update the inp_vflags on an endpoint
5106 */
5107static void
5108sctp_update_ep_vflag(struct sctp_inpcb *inp)
5109{
5110 struct sctp_laddr *laddr;
5111
5112 /* first clear the flag */
5113 inp->ip_inp.inp.inp_vflag = 0;
5114 /* set the flag based on addresses on the ep list */
5115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5116 if (laddr->ifa == NULL) {
5117 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5118 __FUNCTION__);
5119 continue;
5120 }
5121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5122 continue;
5123 }
5124 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5125 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5126 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5127 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5128 }
5129 }
5130}
5131
5132/*
5133 * Add the address to the endpoint local address list There is nothing to be
5134 * done if we are bound to all addresses
5135 */
5136void
5137sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5138{
5139 struct sctp_laddr *laddr;
5140 int fnd, error = 0;
5141
5142 fnd = 0;
5143
5144 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5145 /* You are already bound to all. You have it already */
5146 return;
5147 }
5148 if (ifa->address.sa.sa_family == AF_INET6) {
5149 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5150 /* Can't bind a non-useable addr. */
5151 return;
5152 }
5153 }
5154 /* first, is it already present? */
5155 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5156 if (laddr->ifa == ifa) {
5157 fnd = 1;
5158 break;
5159 }
5160 }
5161
5162 if (fnd == 0) {
5163 /* Not in the ep list */
5164 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5165 if (error != 0)
5166 return;
5167 inp->laddr_count++;
5168 /* update inp_vflag flags */
5169 if (ifa->address.sa.sa_family == AF_INET6) {
5170 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5171 } else if (ifa->address.sa.sa_family == AF_INET) {
5172 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5173 }
5174 }
5175 return;
5176}
5177
5178
5179/*
5180 * select a new (hopefully reachable) destination net (should only be used
5181 * when we deleted an ep addr that is the only usable source address to reach
5182 * the destination net)
5183 */
5184static void
5185sctp_select_primary_destination(struct sctp_tcb *stcb)
5186{
5187 struct sctp_nets *net;
5188
5189 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5190 /* for now, we'll just pick the first reachable one we find */
5191 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5192 continue;
5193 if (sctp_destination_is_reachable(stcb,
5194 (struct sockaddr *)&net->ro._l_addr)) {
5195 /* found a reachable destination */
5196 stcb->asoc.primary_destination = net;
5197 }
5198 }
5199 /* I can't there from here! ...we're gonna die shortly... */
5200}
5201
5202
5203/*
5204 * Delete the address from the endpoint local address list There is nothing
5205 * to be done if we are bound to all addresses
5206 */
5207void
5208sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5209{
5210 struct sctp_laddr *laddr;
5211 int fnd;
5212
5213 fnd = 0;
5214 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5215 /* You are already bound to all. You have it already */
5216 return;
5217 }
5218 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5219 if (laddr->ifa == ifa) {
5220 fnd = 1;
5221 break;
5222 }
5223 }
5224 if (fnd && (inp->laddr_count < 2)) {
5225 /* can't delete unless there are at LEAST 2 addresses */
5226 return;
5227 }
5228 if (fnd) {
5229 /*
5230 * clean up any use of this address go through our
5231 * associations and clear any last_used_address that match
5232 * this one for each assoc, see if a new primary_destination
5233 * is needed
5234 */
5235 struct sctp_tcb *stcb;
5236
5237 /* clean up "next_addr_touse" */
5238 if (inp->next_addr_touse == laddr)
5239 /* delete this address */
5240 inp->next_addr_touse = NULL;
5241
5242 /* clean up "last_used_address" */
5243 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5244 struct sctp_nets *net;
5245
5246 SCTP_TCB_LOCK(stcb);
5247 if (stcb->asoc.last_used_address == laddr)
5248 /* delete this address */
5249 stcb->asoc.last_used_address = NULL;
5250 /*
5251 * Now spin through all the nets and purge any ref
5252 * to laddr
5253 */
5254 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5255 if (net->ro._s_addr &&
5256 (net->ro._s_addr->ifa == laddr->ifa)) {
5257 /* Yep, purge src address selected */
5258 sctp_rtentry_t *rt;
5259
5260 /* delete this address if cached */
5261 rt = net->ro.ro_rt;
5262 if (rt != NULL) {
5263 RTFREE(rt);
5264 net->ro.ro_rt = NULL;
5265 }
5266 sctp_free_ifa(net->ro._s_addr);
5267 net->ro._s_addr = NULL;
5268 net->src_addr_selected = 0;
5269 }
5270 }
5271 SCTP_TCB_UNLOCK(stcb);
5272 } /* for each tcb */
5273 /* remove it from the ep list */
5274 sctp_remove_laddr(laddr);
5275 inp->laddr_count--;
5276 /* update inp_vflag flags */
5277 sctp_update_ep_vflag(inp);
5278 }
5279 return;
5280}
5281
5282/*
5283 * Add the address to the TCB local address restricted list.
5284 * This is a "pending" address list (eg. addresses waiting for an
5285 * ASCONF-ACK response) and cannot be used as a valid source address.
5286 */
5287void
5288sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5289{
5290 struct sctp_inpcb *inp;
5291 struct sctp_laddr *laddr;
5292 struct sctpladdr *list;
5293
5294 /*
5295 * Assumes TCB is locked.. and possibly the INP. May need to
5296 * confirm/fix that if we need it and is not the case.
5297 */
5298 list = &stcb->asoc.sctp_restricted_addrs;
5299
5300 inp = stcb->sctp_ep;
5301 if (ifa->address.sa.sa_family == AF_INET6) {
5302 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5303 /* Can't bind a non-existent addr. */
5304 return;
5305 }
5306 }
5307 /* does the address already exist? */
5308 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5309 if (laddr->ifa == ifa) {
5310 return;
5311 }
5312 }
5313
5314 /* add to the list */
5315 (void)sctp_insert_laddr(list, ifa, 0);
5316 return;
5317}
5318
5319/*
5320 * insert an laddr entry with the given ifa for the desired list
5321 */
5322int
5323sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5324{
5325 struct sctp_laddr *laddr;
5326
5327 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5328 if (laddr == NULL) {
5329 /* out of memory? */
5330 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5331 return (EINVAL);
5332 }
5333 SCTP_INCR_LADDR_COUNT();
5334 bzero(laddr, sizeof(*laddr));
5335 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5336 laddr->ifa = ifa;
5337 laddr->action = act;
5338 atomic_add_int(&ifa->refcount, 1);
5339 /* insert it */
5340 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5341
5342 return (0);
5343}
5344
5345/*
5346 * Remove an laddr entry from the local address list (on an assoc)
5347 */
5348void
5349sctp_remove_laddr(struct sctp_laddr *laddr)
5350{
5351
5352 /* remove from the list */
5353 LIST_REMOVE(laddr, sctp_nxt_addr);
5354 sctp_free_ifa(laddr->ifa);
5355 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5356 SCTP_DECR_LADDR_COUNT();
5357}
5358
5359/*
5360 * Remove a local address from the TCB local address restricted list
5361 */
5362void
5363sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5364{
5365 struct sctp_inpcb *inp;
5366 struct sctp_laddr *laddr;
5367
5368 /*
5369 * This is called by asconf work. It is assumed that a) The TCB is
5370 * locked and b) The INP is locked. This is true in as much as I can
5371 * trace through the entry asconf code where I did these locks.
5372 * Again, the ASCONF code is a bit different in that it does lock
5373 * the INP during its work often times. This must be since we don't
5374 * want other proc's looking up things while what they are looking
5375 * up is changing :-D
5376 */
5377
5378 inp = stcb->sctp_ep;
5379 /* if subset bound and don't allow ASCONF's, can't delete last */
5380 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5381 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5382 if (stcb->sctp_ep->laddr_count < 2) {
5383 /* can't delete last address */
5384 return;
5385 }
5386 }
5387 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5388 /* remove the address if it exists */
5389 if (laddr->ifa == NULL)
5390 continue;
5391 if (laddr->ifa == ifa) {
5392 sctp_remove_laddr(laddr);
5393 return;
5394 }
5395 }
5396
5397 /* address not found! */
5398 return;
5399}
5400
5401/*
5402 * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5403 */
5404/* sysctl */
5405static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5406static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5407
5408void
5409sctp_pcb_init()
5410{
5411 /*
5412 * SCTP initialization for the PCB structures should be called by
5413 * the sctp_init() funciton.
5414 */
5415 int i;
5416 struct timeval tv;
5417
5418 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5419 /* error I was called twice */
5420 return;
5421 }
5422 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5423
5424#if defined(SCTP_LOCAL_TRACE_BUF)
5425 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5426#endif
5427 (void)SCTP_GETTIME_TIMEVAL(&tv);
5428 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5429 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5430 /* init the empty list of (All) Endpoints */
5431 LIST_INIT(&SCTP_BASE_INFO(listhead));
5432
5433 /* init the iterator head */
5434 TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead));
5435
5436 /* init the hash table of endpoints */
5437 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5438 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5439 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5440 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5441 &SCTP_BASE_INFO(hashasocmark));
5442 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5443 &SCTP_BASE_INFO(hashmark));
5444 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5445 &SCTP_BASE_INFO(hashtcpmark));
5446 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5447
5448
5449 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5450 &SCTP_BASE_INFO(hashvrfmark));
5451
5452 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5453 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5454 /* init the zones */
5455 /*
5456 * FIX ME: Should check for NULL returns, but if it does fail we are
5457 * doomed to panic anyways... add later maybe.
5458 */
5459 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5460 sizeof(struct sctp_inpcb), maxsockets);
5461
5462 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5463 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5464
5465 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5466 sizeof(struct sctp_laddr),
5467 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5468
5469 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5470 sizeof(struct sctp_nets),
5471 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5472
5473 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5474 sizeof(struct sctp_tmit_chunk),
5475 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5476
5477 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5478 sizeof(struct sctp_queued_to_read),
5479 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5480
5481 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5482 sizeof(struct sctp_stream_queue_pending),
5483 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5484
5485 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5486 sizeof(struct sctp_asconf),
5487 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5488
5489 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5490 sizeof(struct sctp_asconf_ack),
5491 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5492
5493
5494 /* Master Lock INIT for info structure */
5495 SCTP_INP_INFO_LOCK_INIT();
5496 SCTP_STATLOG_INIT_LOCK();
5497 SCTP_ITERATOR_LOCK_INIT();
5498
5499 SCTP_IPI_COUNT_INIT();
5500 SCTP_IPI_ADDR_INIT();
5501 SCTP_IPI_ITERATOR_WQ_INIT();
5502#ifdef SCTP_PACKET_LOGGING
5503 SCTP_IP_PKTLOG_INIT();
5504#endif
5505 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5506
5507 /* not sure if we need all the counts */
5508 SCTP_BASE_INFO(ipi_count_ep) = 0;
5509 /* assoc/tcb zone info */
5510 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5511 /* local addrlist zone info */
5512 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5513 /* remote addrlist zone info */
5514 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5515 /* chunk info */
5516 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5517
5518 /* socket queue zone info */
5519 SCTP_BASE_INFO(ipi_count_readq) = 0;
5520
5521 /* stream out queue cont */
5522 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5523
5524 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5525 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5526
5527 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5528
5529 /* Init the TIMEWAIT list */
5530 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5531 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i]));
5532 }
5533
5534#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5535 SCTP_BASE_INFO(iterator_running) = 0;
5536 SCTP_BASE_INFO(threads_must_exit) = 0;
5537 sctp_startup_iterator();
5538#endif
5539
5540 /*
5541 * INIT the default VRF which for BSD is the only one, other O/S's
5542 * may have more. But initially they must start with one and then
5543 * add the VRF's as addresses are added.
5544 */
5545 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5546
5547}
5548
5549/*
5550 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5551 */
5552void
5553sctp_pcb_finish(void)
5554{
5555 struct sctp_vrflist *vrf_bucket;
5556 struct sctp_vrf *vrf;
5557 struct sctp_ifn *ifn;
5558 struct sctp_ifa *ifa;
5559 struct sctpvtaghead *chain;
5560 struct sctp_tagblock *twait_block, *prev_twait_block;
5561 int i;
5562
5563 /*
5564 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5565 * destroyed first).
5566 */
5567 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5568 vrf = LIST_FIRST(vrf_bucket);
5569 while (vrf) {
5570 ifn = LIST_FIRST(&vrf->ifnlist);
5571 while (ifn) {
5572 ifa = LIST_FIRST(&ifn->ifalist);
5573 while (ifa) {
5574 /* free the ifa */
5575 LIST_REMOVE(ifa, next_bucket);
5576 LIST_REMOVE(ifa, next_ifa);
5577 SCTP_FREE(ifa, SCTP_M_IFA);
5578 ifa = LIST_FIRST(&ifn->ifalist);
5579 }
5580 /* free the ifn */
5581 LIST_REMOVE(ifn, next_bucket);
5582 LIST_REMOVE(ifn, next_ifn);
5583 SCTP_FREE(ifn, SCTP_M_IFN);
5584 ifn = LIST_FIRST(&vrf->ifnlist);
5585 }
5586 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5587 /* free the vrf */
5588 LIST_REMOVE(vrf, next_vrf);
5589 SCTP_FREE(vrf, SCTP_M_VRF);
5590 vrf = LIST_FIRST(vrf_bucket);
5591 }
5592 /* free the vrf hashes */
5593 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5594 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5595
5596 /*
5597 * free the TIMEWAIT list elements malloc'd in the function
5598 * sctp_add_vtag_to_timewait()...
5599 */
5600 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5601 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5602 if (!SCTP_LIST_EMPTY(chain)) {
5603 prev_twait_block = NULL;
5604 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5605 if (prev_twait_block) {
5606 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5607 }
5608 prev_twait_block = twait_block;
5609 }
5610 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5611 }
5612 }
5613
5614 /* free the locks and mutexes */
5615#ifdef SCTP_PACKET_LOGGING
5616 SCTP_IP_PKTLOG_DESTROY();
5617
5618#endif
5619 SCTP_IPI_ITERATOR_WQ_DESTROY();
5620 SCTP_IPI_ADDR_DESTROY();
5621 SCTP_ITERATOR_LOCK_DESTROY();
5622 SCTP_STATLOG_DESTROY();
5623 SCTP_INP_INFO_LOCK_DESTROY();
5624
5625 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5626 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5627 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5628 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5629 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5630 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5631 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5632 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5633 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5634 /* Get rid of other stuff to */
5635 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5636 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5637 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5638 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5639 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5640 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5641
5642}
5643
5644
5645int
5646sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5647 int iphlen, int offset, int limit, struct sctphdr *sh,
5648 struct sockaddr *altsa)
5649{
5650 /*
5651 * grub through the INIT pulling addresses and loading them to the
5652 * nets structure in the asoc. The from address in the mbuf should
5653 * also be loaded (if it is not already). This routine can be called
5654 * with either INIT or INIT-ACK's as long as the m points to the IP
5655 * packet and the offset points to the beginning of the parameters.
5656 */
5657 struct sctp_inpcb *inp, *l_inp;
5658 struct sctp_nets *net, *net_tmp;
5659 struct ip *iph;
5660 struct sctp_paramhdr *phdr, parm_buf;
5661 struct sctp_tcb *stcb_tmp;
5662 uint16_t ptype, plen;
5663 struct sockaddr *sa;
5664 struct sockaddr_storage dest_store;
5665 struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5666 struct sockaddr_in sin;
5667 struct sockaddr_in6 sin6;
5668 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5669 struct sctp_auth_random *p_random = NULL;
5670 uint16_t random_len = 0;
5671 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5672 struct sctp_auth_hmac_algo *hmacs = NULL;
5673 uint16_t hmacs_len = 0;
5674 uint8_t saw_asconf = 0;
5675 uint8_t saw_asconf_ack = 0;
5676 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5677 struct sctp_auth_chunk_list *chunks = NULL;
5678 uint16_t num_chunks = 0;
5679 sctp_key_t *new_key;
5680 uint32_t keylen;
5681 int got_random = 0, got_hmacs = 0, got_chklist = 0;
5682
5683 /* First get the destination address setup too. */
5684 memset(&sin, 0, sizeof(sin));
5685 memset(&sin6, 0, sizeof(sin6));
5686
5687 sin.sin_family = AF_INET;
5688 sin.sin_len = sizeof(sin);
5689 sin.sin_port = stcb->rport;
5690
5691 sin6.sin6_family = AF_INET6;
5692 sin6.sin6_len = sizeof(struct sockaddr_in6);
5693 sin6.sin6_port = stcb->rport;
5694 if (altsa == NULL) {
5695 iph = mtod(m, struct ip *);
5696 switch (iph->ip_v) {
5697 case IPVERSION:
5698 {
5699 /* its IPv4 */
5700 struct sockaddr_in *sin_2;
5701
5702 sin_2 = (struct sockaddr_in *)(local_sa);
5703 memset(sin_2, 0, sizeof(sin));
5704 sin_2->sin_family = AF_INET;
5705 sin_2->sin_len = sizeof(sin);
5706 sin_2->sin_port = sh->dest_port;
5707 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5708 sin.sin_addr = iph->ip_src;
5709 sa = (struct sockaddr *)&sin;
5710 break;
5711 }
5712#ifdef INET6
5713 case IPV6_VERSION >> 4:
5714 {
5715 /* its IPv6 */
5716 struct ip6_hdr *ip6;
5717 struct sockaddr_in6 *sin6_2;
5718
5719 ip6 = mtod(m, struct ip6_hdr *);
5720 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5721 memset(sin6_2, 0, sizeof(sin6));
5722 sin6_2->sin6_family = AF_INET6;
5723 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5724 sin6_2->sin6_port = sh->dest_port;
5725 sin6.sin6_addr = ip6->ip6_src;
5726 sa = (struct sockaddr *)&sin6;
5727 break;
5728 }
5729#endif
5730 default:
5731 sa = NULL;
5732 break;
5733 }
5734 } else {
5735 /*
5736 * For cookies we use the src address NOT from the packet
5737 * but from the original INIT
5738 */
5739 sa = altsa;
5740 }
5741 /* Turn off ECN until we get through all params */
5742 stcb->asoc.ecn_allowed = 0;
5743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5744 /* mark all addresses that we have currently on the list */
5745 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5746 }
5747 /* does the source address already exist? if so skip it */
5748 l_inp = inp = stcb->sctp_ep;
5749
5750 atomic_add_int(&stcb->asoc.refcnt, 1);
5751 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5752 atomic_add_int(&stcb->asoc.refcnt, -1);
5753
5754 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5755 /* we must add the source address */
5756 /* no scope set here since we have a tcb already. */
5757 if ((sa->sa_family == AF_INET) &&
5758 (stcb->asoc.ipv4_addr_legal)) {
5759 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5760 return (-1);
5761 }
5762 } else if ((sa->sa_family == AF_INET6) &&
5763 (stcb->asoc.ipv6_addr_legal)) {
5764 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5765 return (-2);
5766 }
5767 }
5768 } else {
5769 if (net_tmp != NULL && stcb_tmp == stcb) {
5770 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5771 } else if (stcb_tmp != stcb) {
5772 /* It belongs to another association? */
5773 if (stcb_tmp)
5774 SCTP_TCB_UNLOCK(stcb_tmp);
5775 return (-3);
5776 }
5777 }
5778 if (stcb->asoc.state == 0) {
5779 /* the assoc was freed? */
5780 return (-4);
5781 }
5782 /*
5783 * peer must explicitly turn this on. This may have been initialized
5784 * to be "on" in order to allow local addr changes while INIT's are
5785 * in flight.
5786 */
5787 stcb->asoc.peer_supports_asconf = 0;
5788 /* now we must go through each of the params. */
5789 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5790 while (phdr) {
5791 ptype = ntohs(phdr->param_type);
5792 plen = ntohs(phdr->param_length);
5793 /*
5794 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5795 * (int)plen);
5796 */
5797 if (offset + plen > limit) {
5798 break;
5799 }
5800 if (plen == 0) {
5801 break;
5802 }
5803 if (ptype == SCTP_IPV4_ADDRESS) {
5804 if (stcb->asoc.ipv4_addr_legal) {
5805 struct sctp_ipv4addr_param *p4, p4_buf;
5806
5807 /* ok get the v4 address and check/add */
5808 phdr = sctp_get_next_param(m, offset,
5809 (struct sctp_paramhdr *)&p4_buf,
5810 sizeof(p4_buf));
5811 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5812 phdr == NULL) {
5813 return (-5);
5814 }
5815 p4 = (struct sctp_ipv4addr_param *)phdr;
5816 sin.sin_addr.s_addr = p4->addr;
5817 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5818 /* Skip multi-cast addresses */
5819 goto next_param;
5820 }
5821 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5822 (sin.sin_addr.s_addr == INADDR_ANY)) {
5823 goto next_param;
5824 }
5825 sa = (struct sockaddr *)&sin;
5826 inp = stcb->sctp_ep;
5827 atomic_add_int(&stcb->asoc.refcnt, 1);
5828 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5829 local_sa, stcb);
5830 atomic_add_int(&stcb->asoc.refcnt, -1);
5831
5832 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5833 inp == NULL) {
5834 /* we must add the source address */
5835 /*
5836 * no scope set since we have a tcb
5837 * already
5838 */
5839
5840 /*
5841 * we must validate the state again
5842 * here
5843 */
5844 add_it_now:
5845 if (stcb->asoc.state == 0) {
5846 /* the assoc was freed? */
5847 return (-7);
5848 }
5849 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5850 return (-8);
5851 }
5852 } else if (stcb_tmp == stcb) {
5853 if (stcb->asoc.state == 0) {
5854 /* the assoc was freed? */
5855 return (-10);
5856 }
5857 if (net != NULL) {
5858 /* clear flag */
5859 net->dest_state &=
5860 ~SCTP_ADDR_NOT_IN_ASSOC;
5861 }
5862 } else {
5863 /*
5864 * strange, address is in another
5865 * assoc? straighten out locks.
5866 */
5867 if (stcb_tmp) {
5868 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5869 /*
5870 * in setup state we
5871 * abort this guy
5872 */
5873 sctp_abort_an_association(stcb_tmp->sctp_ep,
5874 stcb_tmp, 1, NULL, 0);
5875 goto add_it_now;
5876 }
5877 SCTP_TCB_UNLOCK(stcb_tmp);
5878 }
5879 if (stcb->asoc.state == 0) {
5880 /* the assoc was freed? */
5881 return (-12);
5882 }
5883 return (-13);
5884 }
5885 }
5886 } else if (ptype == SCTP_IPV6_ADDRESS) {
5887 if (stcb->asoc.ipv6_addr_legal) {
5888 /* ok get the v6 address and check/add */
5889 struct sctp_ipv6addr_param *p6, p6_buf;
5890
5891 phdr = sctp_get_next_param(m, offset,
5892 (struct sctp_paramhdr *)&p6_buf,
5893 sizeof(p6_buf));
5894 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5895 phdr == NULL) {
5896 return (-14);
5897 }
5898 p6 = (struct sctp_ipv6addr_param *)phdr;
5899 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5900 sizeof(p6->addr));
5901 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5902 /* Skip multi-cast addresses */
5903 goto next_param;
5904 }
5905 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5906 /*
5907 * Link local make no sense without
5908 * scope
5909 */
5910 goto next_param;
5911 }
5912 sa = (struct sockaddr *)&sin6;
5913 inp = stcb->sctp_ep;
5914 atomic_add_int(&stcb->asoc.refcnt, 1);
5915 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5916 local_sa, stcb);
5917 atomic_add_int(&stcb->asoc.refcnt, -1);
5918 if (stcb_tmp == NULL &&
5919 (inp == stcb->sctp_ep || inp == NULL)) {
5920 /*
5921 * we must validate the state again
5922 * here
5923 */
5924 add_it_now6:
5925 if (stcb->asoc.state == 0) {
5926 /* the assoc was freed? */
5927 return (-16);
5928 }
5929 /*
5930 * we must add the address, no scope
5931 * set
5932 */
5933 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5934 return (-17);
5935 }
5936 } else if (stcb_tmp == stcb) {
5937 /*
5938 * we must validate the state again
5939 * here
5940 */
5941 if (stcb->asoc.state == 0) {
5942 /* the assoc was freed? */
5943 return (-19);
5944 }
5945 if (net != NULL) {
5946 /* clear flag */
5947 net->dest_state &=
5948 ~SCTP_ADDR_NOT_IN_ASSOC;
5949 }
5950 } else {
5951 /*
5952 * strange, address is in another
5953 * assoc? straighten out locks.
5954 */
5955 if (stcb_tmp)
5956 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5957 /*
5958 * in setup state we
5959 * abort this guy
5960 */
5961 sctp_abort_an_association(stcb_tmp->sctp_ep,
5962 stcb_tmp, 1, NULL, 0);
5963 goto add_it_now6;
5964 }
5965 SCTP_TCB_UNLOCK(stcb_tmp);
5966
5967 if (stcb->asoc.state == 0) {
5968 /* the assoc was freed? */
5969 return (-21);
5970 }
5971 return (-22);
5972 }
5973 }
5974 } else if (ptype == SCTP_ECN_CAPABLE) {
5975 stcb->asoc.ecn_allowed = 1;
5976 } else if (ptype == SCTP_ULP_ADAPTATION) {
5977 if (stcb->asoc.state != SCTP_STATE_OPEN) {
5978 struct sctp_adaptation_layer_indication ai,
5979 *aip;
5980
5981 phdr = sctp_get_next_param(m, offset,
5982 (struct sctp_paramhdr *)&ai, sizeof(ai));
5983 aip = (struct sctp_adaptation_layer_indication *)phdr;
5984 if (aip) {
5985 stcb->asoc.peers_adaptation = ntohl(aip->indication);
5986 stcb->asoc.adaptation_needed = 1;
5987 }
5988 }
5989 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5990 struct sctp_asconf_addr_param lstore, *fee;
5991 struct sctp_asconf_addrv4_param *fii;
5992 int lptype;
5993 struct sockaddr *lsa = NULL;
5994
5995 stcb->asoc.peer_supports_asconf = 1;
5996 if (plen > sizeof(lstore)) {
5997 return (-23);
5998 }
5999 phdr = sctp_get_next_param(m, offset,
6000 (struct sctp_paramhdr *)&lstore,
6001 min(plen, sizeof(lstore)));
6002 if (phdr == NULL) {
6003 return (-24);
6004 }
6005 fee = (struct sctp_asconf_addr_param *)phdr;
6006 lptype = ntohs(fee->addrp.ph.param_type);
6007 if (lptype == SCTP_IPV4_ADDRESS) {
6008 if (plen !=
6009 sizeof(struct sctp_asconf_addrv4_param)) {
6010 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6011 (int)sizeof(struct sctp_asconf_addrv4_param),
6012 plen);
6013 } else {
6014 fii = (struct sctp_asconf_addrv4_param *)fee;
6015 sin.sin_addr.s_addr = fii->addrp.addr;
6016 lsa = (struct sockaddr *)&sin;
6017 }
6018 } else if (lptype == SCTP_IPV6_ADDRESS) {
6019 if (plen !=
6020 sizeof(struct sctp_asconf_addr_param)) {
6021 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6022 (int)sizeof(struct sctp_asconf_addr_param),
6023 plen);
6024 } else {
6025 memcpy(sin6.sin6_addr.s6_addr,
6026 fee->addrp.addr,
6027 sizeof(fee->addrp.addr));
6028 lsa = (struct sockaddr *)&sin6;
6029 }
6030 }
6031 if (lsa) {
6032 (void)sctp_set_primary_addr(stcb, sa, NULL);
6033 }
6034 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6035 stcb->asoc.peer_supports_nat = 1;
6036 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6037 /* Peer supports pr-sctp */
6038 stcb->asoc.peer_supports_prsctp = 1;
6039 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6040 /* A supported extension chunk */
6041 struct sctp_supported_chunk_types_param *pr_supported;
6042 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6043 int num_ent, i;
6044
6045 phdr = sctp_get_next_param(m, offset,
6046 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6047 if (phdr == NULL) {
6048 return (-25);
6049 }
6050 stcb->asoc.peer_supports_asconf = 0;
6051 stcb->asoc.peer_supports_prsctp = 0;
6052 stcb->asoc.peer_supports_pktdrop = 0;
6053 stcb->asoc.peer_supports_strreset = 0;
6054 stcb->asoc.peer_supports_nr_sack = 0;
6055 stcb->asoc.peer_supports_auth = 0;
6056 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6057 num_ent = plen - sizeof(struct sctp_paramhdr);
6058 for (i = 0; i < num_ent; i++) {
6059 switch (pr_supported->chunk_types[i]) {
6060 case SCTP_ASCONF:
6061 case SCTP_ASCONF_ACK:
6062 stcb->asoc.peer_supports_asconf = 1;
6063 break;
6064 case SCTP_FORWARD_CUM_TSN:
6065 stcb->asoc.peer_supports_prsctp = 1;
6066 break;
6067 case SCTP_PACKET_DROPPED:
6068 stcb->asoc.peer_supports_pktdrop = 1;
6069 break;
6070 case SCTP_NR_SELECTIVE_ACK:
6071 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
6072 stcb->asoc.peer_supports_nr_sack = 1;
6073 else
6074 stcb->asoc.peer_supports_nr_sack = 0;
6075 break;
6076 case SCTP_STREAM_RESET:
6077 stcb->asoc.peer_supports_strreset = 1;
6078 break;
6079 case SCTP_AUTHENTICATION:
6080 stcb->asoc.peer_supports_auth = 1;
6081 break;
6082 default:
6083 /* one I have not learned yet */
6084 break;
6085
6086 }
6087 }
6088 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6089 /* Peer supports ECN-nonce */
6090 stcb->asoc.peer_supports_ecn_nonce = 1;
6091 stcb->asoc.ecn_nonce_allowed = 1;
6092 } else if (ptype == SCTP_RANDOM) {
6093 if (plen > sizeof(random_store))
6094 break;
6095 if (got_random) {
6096 /* already processed a RANDOM */
6097 goto next_param;
6098 }
6099 phdr = sctp_get_next_param(m, offset,
6100 (struct sctp_paramhdr *)random_store,
6101 min(sizeof(random_store), plen));
6102 if (phdr == NULL)
6103 return (-26);
6104 p_random = (struct sctp_auth_random *)phdr;
6105 random_len = plen - sizeof(*p_random);
6106 /* enforce the random length */
6107 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6108 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6109 return (-27);
6110 }
6111 got_random = 1;
6112 } else if (ptype == SCTP_HMAC_LIST) {
6113 int num_hmacs;
6114 int i;
6115
6116 if (plen > sizeof(hmacs_store))
6117 break;
6118 if (got_hmacs) {
6119 /* already processed a HMAC list */
6120 goto next_param;
6121 }
6122 phdr = sctp_get_next_param(m, offset,
6123 (struct sctp_paramhdr *)hmacs_store,
6124 min(plen, sizeof(hmacs_store)));
6125 if (phdr == NULL)
6126 return (-28);
6127 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6128 hmacs_len = plen - sizeof(*hmacs);
6129 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6130 /* validate the hmac list */
6131 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6132 return (-29);
6133 }
6134 if (stcb->asoc.peer_hmacs != NULL)
6135 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6136 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6137 if (stcb->asoc.peer_hmacs != NULL) {
6138 for (i = 0; i < num_hmacs; i++) {
6139 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6140 ntohs(hmacs->hmac_ids[i]));
6141 }
6142 }
6143 got_hmacs = 1;
6144 } else if (ptype == SCTP_CHUNK_LIST) {
6145 int i;
6146
6147 if (plen > sizeof(chunks_store))
6148 break;
6149 if (got_chklist) {
6150 /* already processed a Chunks list */
6151 goto next_param;
6152 }
6153 phdr = sctp_get_next_param(m, offset,
6154 (struct sctp_paramhdr *)chunks_store,
6155 min(plen, sizeof(chunks_store)));
6156 if (phdr == NULL)
6157 return (-30);
6158 chunks = (struct sctp_auth_chunk_list *)phdr;
6159 num_chunks = plen - sizeof(*chunks);
6160 if (stcb->asoc.peer_auth_chunks != NULL)
6161 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6162 else
6163 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6164 for (i = 0; i < num_chunks; i++) {
6165 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6166 stcb->asoc.peer_auth_chunks);
6167 /* record asconf/asconf-ack if listed */
6168 if (chunks->chunk_types[i] == SCTP_ASCONF)
6169 saw_asconf = 1;
6170 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6171 saw_asconf_ack = 1;
6172
6173 }
6174 got_chklist = 1;
6175 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6176 (ptype == SCTP_STATE_COOKIE) ||
6177 (ptype == SCTP_UNRECOG_PARAM) ||
6178 (ptype == SCTP_COOKIE_PRESERVE) ||
6179 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6180 (ptype == SCTP_ADD_IP_ADDRESS) ||
6181 (ptype == SCTP_DEL_IP_ADDRESS) ||
6182 (ptype == SCTP_ERROR_CAUSE_IND) ||
6183 (ptype == SCTP_SUCCESS_REPORT)) {
6184 /* don't care */ ;
6185 } else {
6186 if ((ptype & 0x8000) == 0x0000) {
6187 /*
6188 * must stop processing the rest of the
6189 * param's. Any report bits were handled
6190 * with the call to
6191 * sctp_arethere_unrecognized_parameters()
6192 * when the INIT or INIT-ACK was first seen.
6193 */
6194 break;
6195 }
6196 }
6197
6198next_param:
6199 offset += SCTP_SIZE32(plen);
6200 if (offset >= limit) {
6201 break;
6202 }
6203 phdr = sctp_get_next_param(m, offset, &parm_buf,
6204 sizeof(parm_buf));
6205 }
6206 /* Now check to see if we need to purge any addresses */
6207 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6208 net_tmp = TAILQ_NEXT(net, sctp_next);
6209 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6210 SCTP_ADDR_NOT_IN_ASSOC) {
6211 /* This address has been removed from the asoc */
6212 /* remove and free it */
6213 stcb->asoc.numnets--;
6214 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6215 sctp_free_remote_addr(net);
6216 if (net == stcb->asoc.primary_destination) {
6217 stcb->asoc.primary_destination = NULL;
6218 sctp_select_primary_destination(stcb);
6219 }
6220 }
6221 }
6222 /* validate authentication required parameters */
6223 if (got_random && got_hmacs) {
6224 stcb->asoc.peer_supports_auth = 1;
6225 } else {
6226 stcb->asoc.peer_supports_auth = 0;
6227 }
6228 if (!stcb->asoc.peer_supports_auth && got_chklist) {
6229 /* peer does not support auth but sent a chunks list? */
6230 return (-31);
6231 }
6232 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6233 !stcb->asoc.peer_supports_auth) {
6234 /* peer supports asconf but not auth? */
6235 return (-32);
6236 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6237 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6238 return (-33);
6239 }
6240 /* concatenate the full random key */
6241#ifdef SCTP_AUTH_DRAFT_04
6242 keylen = random_len;
6243 new_key = sctp_alloc_key(keylen);
6244 if (new_key != NULL) {
6245 /* copy in the RANDOM */
6246 if (p_random != NULL)
6247 bcopy(p_random->random_data, new_key->key, random_len);
6248 }
6249#else
6250 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6251 if (chunks != NULL) {
6252 keylen += sizeof(*chunks) + num_chunks;
6253 }
6254 new_key = sctp_alloc_key(keylen);
6255 if (new_key != NULL) {
6256 /* copy in the RANDOM */
6257 if (p_random != NULL) {
6258 keylen = sizeof(*p_random) + random_len;
6259 bcopy(p_random, new_key->key, keylen);
6260 }
6261 /* append in the AUTH chunks */
6262 if (chunks != NULL) {
6263 bcopy(chunks, new_key->key + keylen,
6264 sizeof(*chunks) + num_chunks);
6265 keylen += sizeof(*chunks) + num_chunks;
6266 }
6267 /* append in the HMACs */
6268 if (hmacs != NULL) {
6269 bcopy(hmacs, new_key->key + keylen,
6270 sizeof(*hmacs) + hmacs_len);
6271 }
6272 }
6273#endif
6274 else {
6275 /* failed to get memory for the key */
6276 return (-34);
6277 }
6278 if (stcb->asoc.authinfo.peer_random != NULL)
6279 sctp_free_key(stcb->asoc.authinfo.peer_random);
6280 stcb->asoc.authinfo.peer_random = new_key;
6281#ifdef SCTP_AUTH_DRAFT_04
6282 /* don't include the chunks and hmacs for draft -04 */
6283 stcb->asoc.authinfo.peer_random->keylen = random_len;
6284#endif
6285 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6286 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6287
6288 return (0);
6289}
6290
6291int
6292sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6293 struct sctp_nets *net)
6294{
6295 /* make sure the requested primary address exists in the assoc */
6296 if (net == NULL && sa)
6297 net = sctp_findnet(stcb, sa);
6298
6299 if (net == NULL) {
6300 /* didn't find the requested primary address! */
6301 return (-1);
6302 } else {
6303 /* set the primary address */
6304 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6305 /* Must be confirmed, so queue to set */
6306 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6307 return (0);
6308 }
6309 stcb->asoc.primary_destination = net;
6310 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6311 net = TAILQ_FIRST(&stcb->asoc.nets);
6312 if (net != stcb->asoc.primary_destination) {
6313 /*
6314 * first one on the list is NOT the primary
6315 * sctp_cmpaddr() is much more efficent if the
6316 * primary is the first on the list, make it so.
6317 */
6318 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6319 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6320 }
6321 return (0);
6322 }
6323}
6324
6325int
6326sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6327{
6328 /*
6329 * This function serves two purposes. It will see if a TAG can be
6330 * re-used and return 1 for yes it is ok and 0 for don't use that
6331 * tag. A secondary function it will do is purge out old tags that
6332 * can be removed.
6333 */
6334 struct sctpvtaghead *chain;
6335 struct sctp_tagblock *twait_block;
6336 struct sctpasochead *head;
6337 struct sctp_tcb *stcb;
6338 int i;
6339
6340 SCTP_INP_INFO_RLOCK();
6341 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6342 SCTP_BASE_INFO(hashasocmark))];
6343 if (head == NULL) {
6344 /* invalid vtag */
6345 goto skip_vtag_check;
6346 }
6347 LIST_FOREACH(stcb, head, sctp_asocs) {
6348 /*
6349 * We choose not to lock anything here. TCB's can't be
6350 * removed since we have the read lock, so they can't be
6351 * freed on us, same thing for the INP. I may be wrong with
6352 * this assumption, but we will go with it for now :-)
6353 */
6354 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6355 continue;
6356 }
6357 if (stcb->asoc.my_vtag == tag) {
6358 /* candidate */
6359 if (stcb->rport != rport) {
6360 continue;
6361 }
6362 if (stcb->sctp_ep->sctp_lport != lport) {
6363 continue;
6364 }
6365 /* Its a used tag set */
6366 SCTP_INP_INFO_WUNLOCK();
6367 return (0);
6368 }
6369 }
6370skip_vtag_check:
6371
6372 chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))];
6373 /* Now what about timed wait ? */
6374 if (!SCTP_LIST_EMPTY(chain)) {
6375 /*
6376 * Block(s) are present, lets see if we have this tag in the
6377 * list
6378 */
6379 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6380 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6381 if (twait_block->vtag_block[i].v_tag == 0) {
6382 /* not used */
6383 continue;
6384 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6385 now->tv_sec) {
6386 /* Audit expires this guy */
6387 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6388 twait_block->vtag_block[i].v_tag = 0;
6389 twait_block->vtag_block[i].lport = 0;
6390 twait_block->vtag_block[i].rport = 0;
6391 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6392 (twait_block->vtag_block[i].lport == lport) &&
6393 (twait_block->vtag_block[i].rport == rport)) {
6394 /* Bad tag, sorry :< */
6395 SCTP_INP_INFO_WUNLOCK();
6396 return (0);
6397 }
6398 }
6399 }
6400 }
6401 SCTP_INP_INFO_RUNLOCK();
6402 return (1);
6403}
6404
6405
6406static sctp_assoc_t reneged_asoc_ids[256];
6407static uint8_t reneged_at = 0;
6408
6409
6410static void
6411sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6412{
6413 /*
6414 * We must hunt this association for MBUF's past the cumack (i.e.
6415 * out of order data that we can renege on).
6416 */
6417 struct sctp_association *asoc;
6418 struct sctp_tmit_chunk *chk, *nchk;
6419 uint32_t cumulative_tsn_p1, tsn;
6420 struct sctp_queued_to_read *ctl, *nctl;
6421 int cnt, strmat, gap;
6422
6423 /* We look for anything larger than the cum-ack + 1 */
6424
6425 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6426 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6427 return;
6428 }
6429 asoc = &stcb->asoc;
6430 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6431 /* none we can reneg on. */
6432 return;
6433 }
6434 SCTP_STAT_INCR(sctps_protocol_drains_done);
6435 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6436 cnt = 0;
6437 /* First look in the re-assembly queue */
6438 chk = TAILQ_FIRST(&asoc->reasmqueue);
6439 while (chk) {
6440 /* Get the next one */
6441 nchk = TAILQ_NEXT(chk, sctp_next);
6442 if (compare_with_wrap(chk->rec.data.TSN_seq,
6443 cumulative_tsn_p1, MAX_TSN)) {
6444 /* Yep it is above cum-ack */
6445 cnt++;
6446 tsn = chk->rec.data.TSN_seq;
6447 if (tsn >= asoc->mapping_array_base_tsn) {
6448 gap = tsn - asoc->mapping_array_base_tsn;
6449 } else {
6450 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6451 tsn + 1;
6452 }
6453 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6454 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6455 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6456 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6457 if (chk->data) {
6458 sctp_m_freem(chk->data);
6459 chk->data = NULL;
6460 }
6461 sctp_free_a_chunk(stcb, chk);
6462 }
6463 chk = nchk;
6464 }
6465 /* Ok that was fun, now we will drain all the inbound streams? */
6466 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6467 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6468 while (ctl) {
6469 nctl = TAILQ_NEXT(ctl, next);
6470 if (compare_with_wrap(ctl->sinfo_tsn,
6471 cumulative_tsn_p1, MAX_TSN)) {
6472 /* Yep it is above cum-ack */
6473 cnt++;
6474 tsn = ctl->sinfo_tsn;
6475 if (tsn >= asoc->mapping_array_base_tsn) {
6476 gap = tsn -
6477 asoc->mapping_array_base_tsn;
6478 } else {
6479 gap = (MAX_TSN -
6480 asoc->mapping_array_base_tsn) +
6481 tsn + 1;
6482 }
6483 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6484 sctp_ucount_decr(asoc->cnt_on_all_streams);
6485
6486 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
6487 gap);
6488 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
6489 ctl, next);
6490 if (ctl->data) {
6491 sctp_m_freem(ctl->data);
6492 ctl->data = NULL;
6493 }
6494 sctp_free_remote_addr(ctl->whoFrom);
6495 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6496 SCTP_DECR_READQ_COUNT();
6497 }
6498 ctl = nctl;
6499 }
6500 }
6501 /*
6502 * Question, should we go through the delivery queue? The only
6503 * reason things are on here is the app not reading OR a p-d-api up.
6504 * An attacker COULD send enough in to initiate the PD-API and then
6505 * send a bunch of stuff to other streams... these would wind up on
6506 * the delivery queue.. and then we would not get to them. But in
6507 * order to do this I then have to back-track and un-deliver
6508 * sequence numbers in streams.. el-yucko. I think for now we will
6509 * NOT look at the delivery queue and leave it to be something to
6510 * consider later. An alternative would be to abort the P-D-API with
6511 * a notification and then deliver the data.... Or another method
6512 * might be to keep track of how many times the situation occurs and
6513 * if we see a possible attack underway just abort the association.
6514 */
6515#ifdef SCTP_DEBUG
6516 if (cnt) {
6517 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6518 }
6519#endif
6520 if (cnt) {
6521 /*
6522 * Now do we need to find a new
6523 * asoc->highest_tsn_inside_map?
6524 */
6525 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6526 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6527 } else {
6528 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6529 asoc->highest_tsn_inside_map + 1;
6530 }
6531 if (gap >= (asoc->mapping_array_size << 3)) {
6532 /*
6533 * Something bad happened or cum-ack and high were
6534 * behind the base, but if so earlier checks should
6535 * have found NO data... wierd... we will start at
6536 * end of mapping array.
6537 */
6538 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6539 (int)gap,
6540 (int)(asoc->mapping_array_size << 3),
6541 (int)asoc->highest_tsn_inside_map);
6542 gap = asoc->mapping_array_size << 3;
6543 }
6544 while (gap > 0) {
6545 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6546 /* found the new highest */
6547 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6548 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6549 sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6550 }
6551 break;
6552 }
6553 gap--;
6554 }
6555 if (gap == 0) {
6556 /* Nothing left in map */
6557 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6558 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6559 asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6560 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6561 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6562 }
6563 }
6564 asoc->last_revoke_count = cnt;
6565 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6566 /* sa_ignore NO_NULL_CHK */
6567 sctp_send_sack(stcb);
6568 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6569 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6570 reneged_at++;
6571 }
6572 /*
6573 * Another issue, in un-setting the TSN's in the mapping array we
6574 * DID NOT adjust the higest_tsn marker. This will cause one of two
6575 * things to occur. It may cause us to do extra work in checking for
6576 * our mapping array movement. More importantly it may cause us to
6577 * SACK every datagram. This may not be a bad thing though since we
6578 * will recover once we get our cum-ack above and all this stuff we
6579 * dumped recovered.
6580 */
6581}
6582
6583void
6584sctp_drain()
6585{
6586 /*
6587 * We must walk the PCB lists for ALL associations here. The system
6588 * is LOW on MBUF's and needs help. This is where reneging will
6589 * occur. We really hope this does NOT happen!
6590 */
6591 struct sctp_inpcb *inp;
6592 struct sctp_tcb *stcb;
6593
6594 SCTP_INP_INFO_RLOCK();
6595 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6596 /* For each endpoint */
6597 SCTP_INP_RLOCK(inp);
6598 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6599 /* For each association */
6600 SCTP_TCB_LOCK(stcb);
6601 sctp_drain_mbufs(inp, stcb);
6602 SCTP_TCB_UNLOCK(stcb);
6603 }
6604 SCTP_INP_RUNLOCK(inp);
6605 }
6606 SCTP_INP_INFO_RUNLOCK();
6607}
6608
6609/*
6610 * start a new iterator
6611 * iterates through all endpoints and associations based on the pcb_state
6612 * flags and asoc_state. "af" (mandatory) is executed for all matching
6613 * assocs and "ef" (optional) is executed when the iterator completes.
6614 * "inpf" (optional) is executed for each new endpoint as it is being
6615 * iterated through. inpe (optional) is called when the inp completes
6616 * its way through all the stcbs.
6617 */
6618int
6619sctp_initiate_iterator(inp_func inpf,
6620 asoc_func af,
6621 inp_func inpe,
6622 uint32_t pcb_state,
6623 uint32_t pcb_features,
6624 uint32_t asoc_state,
6625 void *argp,
6626 uint32_t argi,
6627 end_func ef,
6628 struct sctp_inpcb *s_inp,
6629 uint8_t chunk_output_off)
6630{
6631 struct sctp_iterator *it = NULL;
6632
6633 if (af == NULL) {
6634 return (-1);
6635 }
6636 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6637 SCTP_M_ITER);
6638 if (it == NULL) {
6639 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6640 return (ENOMEM);
6641 }
6642 memset(it, 0, sizeof(*it));
6643 it->function_assoc = af;
6644 it->function_inp = inpf;
6645 if (inpf)
6646 it->done_current_ep = 0;
6647 else
6648 it->done_current_ep = 1;
6649 it->function_atend = ef;
6650 it->pointer = argp;
6651 it->val = argi;
6652 it->pcb_flags = pcb_state;
6653 it->pcb_features = pcb_features;
6654 it->asoc_state = asoc_state;
6655 it->function_inp_end = inpe;
6656 it->no_chunk_output = chunk_output_off;
6657 if (s_inp) {
6658 it->inp = s_inp;
6659 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6660 } else {
6661 SCTP_INP_INFO_RLOCK();
6662 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6663
6664 SCTP_INP_INFO_RUNLOCK();
6665 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6666
6667 }
6668 SCTP_IPI_ITERATOR_WQ_LOCK();
6669 if (it->inp) {
6670 SCTP_INP_INCR_REF(it->inp);
6671 }
6672 TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr);
6673#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6674 if (SCTP_BASE_INFO(iterator_running) == 0) {
6675 sctp_wakeup_iterator();
6676 }
6677 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6678#else
6679 if (it->inp)
6680 SCTP_INP_DECR_REF(it->inp);
6681 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6682 /* Init the timer */
6683 SCTP_OS_TIMER_INIT(&it->tmr.timer);
6684 /* add to the list of all iterators */
6685 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6686 NULL, NULL);
6687#endif
6688 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6689 return (0);
6690}
|