2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_pcb.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp.h>
45 #include <netinet/sctp_header.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_output.h>
48 #include <netinet/sctp_timer.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
54 #include <netinet6/ip6_var.h>
56 #include <sys/sched.h>
58 #include <sys/unistd.h>
60 /* FIX: we don't handle multiple link local scopes */
61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
66 struct sockaddr_in6 tmp_a, tmp_b;
68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
84 * We really don't need to lock this, but I will just because it
87 SCTP_INP_INFO_RLOCK();
88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
96 SCTP_INP_INFO_RUNLOCK();
100 * Addresses are added to VRF's (Virtual Router's). For BSD we
101 * have only the default VRF 0. We maintain a hash list of
102 * VRF's. Each VRF has its own list of sctp_ifn's. Each of
103 * these has a list of addresses. When we add a new address
104 * to a VRF we lookup the ifn/ifn_index, if the ifn does
105 * not exist we create it and add it to the list of IFN's
106 * within the VRF. Once we have the sctp_ifn, we add the
107 * address to the list. So we look something like:
110 * vrf-> ifn-> ifn -> ifn
112 * ... +--ifa-> ifa -> ifa
115 * We keep these separate lists since the SCTP subsystem will
116 * point to these from its source address selection nets structure.
117 * When an address is deleted it does not happen right away on
118 * the SCTP side, it gets scheduled. What we do when a
119 * delete happens is immediately remove the address from
120 * the master list and decrement the refcount. As our
121 * addip iterator works through and frees the src address
122 * selection pointing to the sctp_ifa, eventually the refcount
123 * will reach 0 and we will delete it. Note that it is assumed
124 * that any locking on system level ifn/ifa is done at the
125 * caller of these functions and these routines will only
126 * lock the SCTP structures as they add or delete things.
128 * Other notes on VRF concepts.
129 * - An endpoint can be in multiple VRF's
130 * - An association lives within a VRF and only one VRF.
131 * - Any incoming packet we can deduce the VRF for by
132 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
133 * - Any downward send call or connect call must supply the
134 * VRF via ancillary data or via some sort of set default
135 * VRF socket option call (again for BSD no brainer since
136 * the VRF is always 0).
137 * - An endpoint may add multiple VRF's to it.
138 * - Listening sockets can accept associations in any
139 * of the VRF's they are in but the assoc will end up
140 * in only one VRF (gotten from the packet or connect/send).
145 sctp_allocate_vrf(int vrf_id)
147 struct sctp_vrf *vrf = NULL;
148 struct sctp_vrflist *bucket;
150 /* First allocate the VRF structure */
151 vrf = sctp_find_vrf(vrf_id);
153 /* Already allocated */
156 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
161 panic("No memory for VRF:%d", vrf_id);
166 memset(vrf, 0, sizeof(struct sctp_vrf));
167 vrf->vrf_id = vrf_id;
168 LIST_INIT(&vrf->ifnlist);
169 vrf->total_ifa_count = 0;
171 /* now also setup table ids */
172 SCTP_INIT_VRF_TABLEID(vrf);
173 /* Init the HASH of addresses */
174 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
175 &vrf->vrf_addr_hashmark);
176 if (vrf->vrf_addr_hash == NULL) {
179 panic("No memory for VRF:%d", vrf_id);
181 SCTP_FREE(vrf, SCTP_M_VRF);
185 /* Add it to the hash table */
186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
187 LIST_INSERT_HEAD(bucket, vrf, next_vrf);
188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
193 sctp_find_ifn(void *ifn, uint32_t ifn_index)
195 struct sctp_ifn *sctp_ifnp;
196 struct sctp_ifnlist *hash_ifn_head;
199 * We assume the lock is held for the addresses if that's wrong
200 * problems could occur :-)
202 SCTP_IPI_ADDR_LOCK_ASSERT();
203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
205 if (sctp_ifnp->ifn_index == ifn_index) {
208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
216 sctp_find_vrf(uint32_t vrf_id)
218 struct sctp_vrflist *bucket;
219 struct sctp_vrf *liste;
221 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
222 LIST_FOREACH(liste, bucket, next_vrf) {
223 if (vrf_id == liste->vrf_id) {
231 sctp_free_vrf(struct sctp_vrf *vrf)
233 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
234 if (vrf->vrf_addr_hash) {
235 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
236 vrf->vrf_addr_hash = NULL;
238 /* We zero'd the count */
239 LIST_REMOVE(vrf, next_vrf);
240 SCTP_FREE(vrf, SCTP_M_VRF);
241 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
248 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
249 /* We zero'd the count */
250 if (sctp_ifnp->vrf) {
251 sctp_free_vrf(sctp_ifnp->vrf);
253 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
254 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
261 struct sctp_ifn *sctp_ifnp;
263 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
264 if (sctp_ifnp != NULL) {
265 sctp_ifnp->ifn_mtu = mtu;
270 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
272 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
273 /* We zero'd the count */
274 if (sctp_ifap->ifn_p) {
275 sctp_free_ifn(sctp_ifap->ifn_p);
277 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
278 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
285 struct sctp_ifn *found;
287 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
289 /* Not in the list.. sorry */
292 if (hold_addr_lock == 0) {
293 SCTP_IPI_ADDR_WLOCK();
295 SCTP_IPI_ADDR_WLOCK_ASSERT();
297 LIST_REMOVE(sctp_ifnp, next_bucket);
298 LIST_REMOVE(sctp_ifnp, next_ifn);
299 if (hold_addr_lock == 0) {
300 SCTP_IPI_ADDR_WUNLOCK();
302 /* Take away the reference, and possibly free it */
303 sctp_free_ifn(sctp_ifnp);
307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
308 const char *if_name, uint32_t ifn_index)
310 struct sctp_vrf *vrf;
311 struct sctp_ifa *sctp_ifap;
313 SCTP_IPI_ADDR_RLOCK();
314 vrf = sctp_find_vrf(vrf_id);
316 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
319 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
320 if (sctp_ifap == NULL) {
321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
324 if (sctp_ifap->ifn_p == NULL) {
325 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
329 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
331 sctp_ifap->ifn_p->ifn_name, if_name);
335 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
336 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
337 sctp_ifap->ifn_p->ifn_index, ifn_index);
342 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
343 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
345 SCTP_IPI_ADDR_RUNLOCK();
349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
350 const char *if_name, uint32_t ifn_index)
352 struct sctp_vrf *vrf;
353 struct sctp_ifa *sctp_ifap;
355 SCTP_IPI_ADDR_RLOCK();
356 vrf = sctp_find_vrf(vrf_id);
358 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
361 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
362 if (sctp_ifap == NULL) {
363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
366 if (sctp_ifap->ifn_p == NULL) {
367 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
371 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
372 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
373 sctp_ifap->ifn_p->ifn_name, if_name);
377 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
379 sctp_ifap->ifn_p->ifn_index, ifn_index);
384 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
385 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
387 SCTP_IPI_ADDR_RUNLOCK();
391 * Add an ifa to an ifn.
392 * Register the interface as necessary.
393 * NOTE: ADDR write lock MUST be held.
396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
400 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
401 sctp_ifap->ifn_p = sctp_ifnp;
402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
403 /* update address counts */
404 sctp_ifnp->ifa_count++;
405 ifa_af = sctp_ifap->address.sa.sa_family;
420 if (sctp_ifnp->ifa_count == 1) {
421 /* register the new interface */
422 sctp_ifnp->registered_af = ifa_af;
427 * Remove an ifa from its ifn.
428 * If no more addresses exist, remove the ifn too. Otherwise, re-register
429 * the interface based on the remaining address families left.
430 * NOTE: ADDR write lock MUST be held.
433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
435 LIST_REMOVE(sctp_ifap, next_ifa);
436 if (sctp_ifap->ifn_p) {
437 /* update address counts */
438 sctp_ifap->ifn_p->ifa_count--;
439 switch (sctp_ifap->address.sa.sa_family) {
442 sctp_ifap->ifn_p->num_v4--;
447 sctp_ifap->ifn_p->num_v6--;
454 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
455 /* remove the ifn, possibly freeing it */
456 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
458 /* re-register address family type, if needed */
459 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
460 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
461 sctp_ifap->ifn_p->registered_af = AF_INET;
462 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
463 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
464 sctp_ifap->ifn_p->registered_af = AF_INET6;
466 /* free the ifn refcount */
467 sctp_free_ifn(sctp_ifap->ifn_p);
469 sctp_ifap->ifn_p = NULL;
474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
475 uint32_t ifn_type, const char *if_name, void *ifa,
476 struct sockaddr *addr, uint32_t ifa_flags,
479 struct sctp_vrf *vrf;
480 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
481 struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
482 struct sctp_ifalist *hash_addr_head;
483 struct sctp_ifnlist *hash_ifn_head;
484 uint32_t hash_of_addr;
488 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
489 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
491 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
492 sizeof(struct sctp_ifn), SCTP_M_IFN);
493 if (new_sctp_ifnp == NULL) {
495 panic("No memory for IFN");
499 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
500 if (new_sctp_ifap == NULL) {
502 panic("No memory for IFA");
504 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
508 SCTP_IPI_ADDR_WLOCK();
509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
511 vrf = sctp_ifnp->vrf;
513 vrf = sctp_find_vrf(vrf_id);
515 vrf = sctp_allocate_vrf(vrf_id);
517 SCTP_IPI_ADDR_WUNLOCK();
518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
519 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
524 if (sctp_ifnp == NULL) {
526 * build one and add it, can't hold lock until after malloc
529 sctp_ifnp = new_sctp_ifnp;
530 new_sctp_ifnp = NULL;
531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
532 sctp_ifnp->ifn_index = ifn_index;
533 sctp_ifnp->ifn_p = ifn;
534 sctp_ifnp->ifn_type = ifn_type;
535 sctp_ifnp->refcount = 0;
536 sctp_ifnp->vrf = vrf;
537 atomic_add_int(&vrf->refcount, 1);
538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index);
539 if (if_name != NULL) {
540 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
542 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
545 LIST_INIT(&sctp_ifnp->ifalist);
546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
553 /* Hmm, it already exists? */
554 if ((sctp_ifap->ifn_p) &&
555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
557 sctp_ifap->ifn_p->ifn_name, ifn_index,
560 /* Remove the created one that we don't want */
561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
564 /* easy to solve, just switch back to active */
565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
567 sctp_ifap->ifn_p = sctp_ifnp;
568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
571 SCTP_IPI_ADDR_WUNLOCK();
572 if (new_sctp_ifnp != NULL) {
573 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
575 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
578 if (sctp_ifap->ifn_p) {
580 * The last IFN gets the address, remove the
583 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
584 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
585 sctp_ifap->ifn_p->ifn_index, if_name,
587 /* remove the address from the old ifn */
588 sctp_remove_ifa_from_ifn(sctp_ifap);
589 /* move the address over to the new ifn */
590 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
591 goto exit_stage_left;
593 /* repair ifnp which was NULL ? */
594 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
595 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
596 (void *)sctp_ifnp, (void *)sctp_ifap);
597 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
599 goto exit_stage_left;
602 sctp_ifap = new_sctp_ifap;
603 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
604 sctp_ifap->ifn_p = sctp_ifnp;
605 atomic_add_int(&sctp_ifnp->refcount, 1);
606 sctp_ifap->vrf_id = vrf_id;
607 sctp_ifap->ifa = ifa;
608 memcpy(&sctp_ifap->address, addr, addr->sa_len);
609 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
610 sctp_ifap->flags = ifa_flags;
612 switch (sctp_ifap->address.sa.sa_family) {
616 struct sockaddr_in *sin;
618 sin = &sctp_ifap->address.sin;
619 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
620 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
621 sctp_ifap->src_is_loop = 1;
623 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
624 sctp_ifap->src_is_priv = 1;
628 new_ifn_af = AF_INET;
635 /* ok to use deprecated addresses? */
636 struct sockaddr_in6 *sin6;
638 sin6 = &sctp_ifap->address.sin6;
639 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
640 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
641 sctp_ifap->src_is_loop = 1;
643 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
644 sctp_ifap->src_is_priv = 1;
648 new_ifn_af = AF_INET6;
656 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
658 if ((sctp_ifap->src_is_priv == 0) &&
659 (sctp_ifap->src_is_loop == 0)) {
660 sctp_ifap->src_is_glob = 1;
662 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
663 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
664 sctp_ifap->refcount = 1;
665 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
666 sctp_ifnp->ifa_count++;
667 vrf->total_ifa_count++;
668 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
670 sctp_ifnp->registered_af = new_ifn_af;
672 SCTP_IPI_ADDR_WUNLOCK();
673 if (new_sctp_ifnp != NULL) {
674 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
679 * Bump up the refcount so that when the timer completes it
680 * will drop back down.
682 struct sctp_laddr *wi;
684 atomic_add_int(&sctp_ifap->refcount, 1);
685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
688 * Gak, what can we do? We have lost an address
689 * change can you say HOSED?
691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
692 /* Opps, must decrement the count */
693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
697 SCTP_INCR_LADDR_COUNT();
698 memset(wi, 0, sizeof(*wi));
699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
701 wi->action = SCTP_ADD_IP_ADDRESS;
704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
705 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
706 (struct sctp_inpcb *)NULL,
707 (struct sctp_tcb *)NULL,
708 (struct sctp_nets *)NULL);
709 SCTP_WQ_ADDR_UNLOCK();
711 /* it's ready for use */
712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
719 uint32_t ifn_index, const char *if_name)
721 struct sctp_vrf *vrf;
722 struct sctp_ifa *sctp_ifap = NULL;
724 SCTP_IPI_ADDR_WLOCK();
725 vrf = sctp_find_vrf(vrf_id);
727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
737 /* Validate the delete */
738 if (sctp_ifap->ifn_p) {
742 * The name has priority over the ifn_index
746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
747 /* They match its a correct delete */
752 /* last ditch check ifn_index */
753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
759 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
762 SCTP_IPI_ADDR_WUNLOCK();
766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
769 * We don't set the flag. This means that the structure will
770 * hang around in EP's that have bound specific to it until
771 * they close. This gives us TCP like behavior if someone
772 * removes an address (or for that matter adds it right
775 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
776 vrf->total_ifa_count--;
777 LIST_REMOVE(sctp_ifap, next_bucket);
778 sctp_remove_ifa_from_ifn(sctp_ifap);
782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
789 SCTP_IPI_ADDR_WUNLOCK();
791 struct sctp_laddr *wi;
793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
796 * Gak, what can we do? We have lost an address
797 * change can you say HOSED?
799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
801 /* Oops, must decrement the count */
802 sctp_free_ifa(sctp_ifap);
805 SCTP_INCR_LADDR_COUNT();
806 memset(wi, 0, sizeof(*wi));
807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
809 wi->action = SCTP_DEL_IP_ADDRESS;
812 * Should this really be a tailq? As it is we will process
813 * the newest first :-0
815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
817 (struct sctp_inpcb *)NULL,
818 (struct sctp_tcb *)NULL,
819 (struct sctp_nets *)NULL);
820 SCTP_WQ_ADDR_UNLOCK();
826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
830 int ipv4_local_scope, ipv4_addr_legal;
833 int local_scope, site_scope, ipv6_addr_legal;
835 struct sctp_vrf *vrf;
836 struct sctp_ifn *sctp_ifn;
837 struct sctp_ifa *sctp_ifa;
839 loopback_scope = stcb->asoc.scope.loopback_scope;
841 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
842 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
845 local_scope = stcb->asoc.scope.local_scope;
846 site_scope = stcb->asoc.scope.site_scope;
847 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
850 SCTP_IPI_ADDR_RLOCK();
851 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
853 /* no vrf, no addresses */
854 SCTP_IPI_ADDR_RUNLOCK();
858 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
859 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
860 if ((loopback_scope == 0) &&
861 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
864 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
865 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
866 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
868 * We allow pending addresses, where
869 * we have sent an asconf-add to be
874 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
877 switch (sctp_ifa->address.sa.sa_family) {
880 if (ipv4_addr_legal) {
881 struct sockaddr_in *sin,
884 sin = &sctp_ifa->address.sin;
885 rsin = (struct sockaddr_in *)to;
886 if ((ipv4_local_scope == 0) &&
887 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
890 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
891 &sin->sin_addr) != 0) {
894 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
895 SCTP_IPI_ADDR_RUNLOCK();
903 if (ipv6_addr_legal) {
904 struct sockaddr_in6 *sin6,
907 sin6 = &sctp_ifa->address.sin6;
908 rsin6 = (struct sockaddr_in6 *)to;
909 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
910 &sin6->sin6_addr) != 0) {
913 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
914 if (local_scope == 0)
916 if (sin6->sin6_scope_id == 0) {
917 if (sa6_recoverscope(sin6) != 0)
921 if ((site_scope == 0) &&
922 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
925 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
926 SCTP_IPI_ADDR_RUNLOCK();
939 struct sctp_laddr *laddr;
941 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
942 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
943 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
946 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
947 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
949 * We allow pending addresses, where we have
950 * sent an asconf-add to be considered
955 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
958 switch (to->sa_family) {
962 struct sockaddr_in *sin, *rsin;
964 sin = &laddr->ifa->address.sin;
965 rsin = (struct sockaddr_in *)to;
966 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
967 SCTP_IPI_ADDR_RUNLOCK();
976 struct sockaddr_in6 *sin6, *rsin6;
978 sin6 = &laddr->ifa->address.sin6;
979 rsin6 = (struct sockaddr_in6 *)to;
980 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
981 SCTP_IPI_ADDR_RUNLOCK();
994 SCTP_IPI_ADDR_RUNLOCK();
998 static struct sctp_tcb *
999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1000 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1002 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1004 * If we support the TCP model, then we must now dig through to see
1005 * if we can find our endpoint in the list of tcp ep's.
1007 uint16_t lport, rport;
1008 struct sctppcbhead *ephead;
1009 struct sctp_inpcb *inp;
1010 struct sctp_laddr *laddr;
1011 struct sctp_tcb *stcb;
1012 struct sctp_nets *net;
1014 if ((to == NULL) || (from == NULL)) {
1018 switch (to->sa_family) {
1021 if (from->sa_family == AF_INET) {
1022 lport = ((struct sockaddr_in *)to)->sin_port;
1023 rport = ((struct sockaddr_in *)from)->sin_port;
1031 if (from->sa_family == AF_INET6) {
1032 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1033 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1042 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1044 * Ok now for each of the guys in this bucket we must look and see:
1045 * - Does the remote port match. - Does there single association's
1046 * addresses match this address (to). If so we update p_ep to point
1047 * to this ep and return the tcb from it.
1049 LIST_FOREACH(inp, ephead, sctp_hash) {
1050 SCTP_INP_RLOCK(inp);
1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1052 SCTP_INP_RUNLOCK(inp);
1055 if (lport != inp->sctp_lport) {
1056 SCTP_INP_RUNLOCK(inp);
1059 switch (to->sa_family) {
1063 struct sockaddr_in *sin;
1065 sin = (struct sockaddr_in *)to;
1066 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1067 &sin->sin_addr) != 0) {
1068 SCTP_INP_RUNLOCK(inp);
1077 struct sockaddr_in6 *sin6;
1079 sin6 = (struct sockaddr_in6 *)to;
1080 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1081 &sin6->sin6_addr) != 0) {
1082 SCTP_INP_RUNLOCK(inp);
1089 SCTP_INP_RUNLOCK(inp);
1092 if (inp->def_vrf_id != vrf_id) {
1093 SCTP_INP_RUNLOCK(inp);
1096 /* check to see if the ep has one of the addresses */
1097 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1098 /* We are NOT bound all, so look further */
1101 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1102 if (laddr->ifa == NULL) {
1103 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1106 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1107 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1110 if (laddr->ifa->address.sa.sa_family ==
1112 /* see if it matches */
1114 if (from->sa_family == AF_INET) {
1115 struct sockaddr_in *intf_addr,
1118 intf_addr = &laddr->ifa->address.sin;
1119 sin = (struct sockaddr_in *)to;
1120 if (sin->sin_addr.s_addr ==
1121 intf_addr->sin_addr.s_addr) {
1128 if (from->sa_family == AF_INET6) {
1129 struct sockaddr_in6 *intf_addr6;
1130 struct sockaddr_in6 *sin6;
1132 sin6 = (struct sockaddr_in6 *)
1134 intf_addr6 = &laddr->ifa->address.sin6;
1136 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1146 /* This endpoint does not have this address */
1147 SCTP_INP_RUNLOCK(inp);
1152 * Ok if we hit here the ep has the address, does it hold
1155 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1156 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1158 SCTP_INP_RUNLOCK(inp);
1161 SCTP_TCB_LOCK(stcb);
1162 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1163 SCTP_TCB_UNLOCK(stcb);
1164 SCTP_INP_RUNLOCK(inp);
1167 if (stcb->rport != rport) {
1168 /* remote port does not match. */
1169 SCTP_TCB_UNLOCK(stcb);
1170 SCTP_INP_RUNLOCK(inp);
1173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1174 SCTP_TCB_UNLOCK(stcb);
1175 SCTP_INP_RUNLOCK(inp);
1178 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1179 SCTP_TCB_UNLOCK(stcb);
1180 SCTP_INP_RUNLOCK(inp);
1183 /* Does this TCB have a matching address? */
1184 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1185 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1186 /* not the same family, can't be a match */
1189 switch (from->sa_family) {
1193 struct sockaddr_in *sin, *rsin;
1195 sin = (struct sockaddr_in *)&net->ro._l_addr;
1196 rsin = (struct sockaddr_in *)from;
1197 if (sin->sin_addr.s_addr ==
1198 rsin->sin_addr.s_addr) {
1204 * Update the endpoint
1208 SCTP_INP_RUNLOCK(inp);
1217 struct sockaddr_in6 *sin6, *rsin6;
1219 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1220 rsin6 = (struct sockaddr_in6 *)from;
1221 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1228 * Update the endpoint
1232 SCTP_INP_RUNLOCK(inp);
1243 SCTP_TCB_UNLOCK(stcb);
1244 SCTP_INP_RUNLOCK(inp);
1252 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1253 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1254 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1260 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1262 struct sctpasochead *head;
1263 struct sctp_inpcb *inp;
1264 struct sctp_tcb *stcb = NULL;
1265 struct sctp_nets *net;
1269 switch (remote->sa_family) {
1272 rport = (((struct sockaddr_in *)remote)->sin_port);
1277 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1285 * UN-lock so we can do proper locking here this occurs when
1286 * called from load_addresses_from_init.
1288 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1289 SCTP_TCB_UNLOCK(locked_tcb);
1291 SCTP_INP_INFO_RLOCK();
1292 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1293 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1295 * Now either this guy is our listener or it's the
1296 * connector. If it is the one that issued the connect, then
1297 * it's only chance is to be the first TCB in the list. If
1298 * it is the acceptor, then do the special_lookup to hash
1299 * and find the real inp.
1301 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1302 /* to is peer addr, from is my addr */
1303 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1304 netp, inp->def_vrf_id);
1305 if ((stcb != NULL) && (locked_tcb == NULL)) {
1306 /* we have a locked tcb, lower refcount */
1307 SCTP_INP_DECR_REF(inp);
1309 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1310 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1311 SCTP_TCB_LOCK(locked_tcb);
1312 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1313 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1315 SCTP_INP_INFO_RUNLOCK();
1318 SCTP_INP_WLOCK(inp);
1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1322 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1326 SCTP_TCB_LOCK(stcb);
1328 if (stcb->rport != rport) {
1329 /* remote port does not match. */
1330 SCTP_TCB_UNLOCK(stcb);
1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334 SCTP_TCB_UNLOCK(stcb);
1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1338 SCTP_TCB_UNLOCK(stcb);
1341 /* now look at the list of remote addresses */
1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1344 if (net == (TAILQ_NEXT(net, sctp_next))) {
1345 panic("Corrupt net list");
1348 if (net->ro._l_addr.sa.sa_family !=
1349 remote->sa_family) {
1350 /* not the same family */
1353 switch (remote->sa_family) {
1357 struct sockaddr_in *sin,
1360 sin = (struct sockaddr_in *)
1362 rsin = (struct sockaddr_in *)remote;
1363 if (sin->sin_addr.s_addr ==
1364 rsin->sin_addr.s_addr) {
1369 if (locked_tcb == NULL) {
1370 SCTP_INP_DECR_REF(inp);
1371 } else if (locked_tcb != stcb) {
1372 SCTP_TCB_LOCK(locked_tcb);
1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1378 SCTP_INP_WUNLOCK(inp);
1379 SCTP_INP_INFO_RUNLOCK();
1388 struct sockaddr_in6 *sin6,
1391 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1392 rsin6 = (struct sockaddr_in6 *)remote;
1393 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1399 if (locked_tcb == NULL) {
1400 SCTP_INP_DECR_REF(inp);
1401 } else if (locked_tcb != stcb) {
1402 SCTP_TCB_LOCK(locked_tcb);
1405 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1407 SCTP_INP_WUNLOCK(inp);
1408 SCTP_INP_INFO_RUNLOCK();
1419 SCTP_TCB_UNLOCK(stcb);
1422 SCTP_INP_WLOCK(inp);
1423 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1426 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1427 inp->sctp_hashmark)];
1428 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1429 if (stcb->rport != rport) {
1430 /* remote port does not match */
1433 SCTP_TCB_LOCK(stcb);
1434 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1435 SCTP_TCB_UNLOCK(stcb);
1438 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1439 SCTP_TCB_UNLOCK(stcb);
1442 /* now look at the list of remote addresses */
1443 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1445 if (net == (TAILQ_NEXT(net, sctp_next))) {
1446 panic("Corrupt net list");
1449 if (net->ro._l_addr.sa.sa_family !=
1450 remote->sa_family) {
1451 /* not the same family */
1454 switch (remote->sa_family) {
1458 struct sockaddr_in *sin,
1461 sin = (struct sockaddr_in *)
1463 rsin = (struct sockaddr_in *)remote;
1464 if (sin->sin_addr.s_addr ==
1465 rsin->sin_addr.s_addr) {
1470 if (locked_tcb == NULL) {
1471 SCTP_INP_DECR_REF(inp);
1472 } else if (locked_tcb != stcb) {
1473 SCTP_TCB_LOCK(locked_tcb);
1476 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1478 SCTP_INP_WUNLOCK(inp);
1479 SCTP_INP_INFO_RUNLOCK();
1488 struct sockaddr_in6 *sin6,
1491 sin6 = (struct sockaddr_in6 *)
1493 rsin6 = (struct sockaddr_in6 *)remote;
1494 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1500 if (locked_tcb == NULL) {
1501 SCTP_INP_DECR_REF(inp);
1502 } else if (locked_tcb != stcb) {
1503 SCTP_TCB_LOCK(locked_tcb);
1506 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1508 SCTP_INP_WUNLOCK(inp);
1509 SCTP_INP_INFO_RUNLOCK();
1520 SCTP_TCB_UNLOCK(stcb);
1524 /* clean up for returning null */
1526 SCTP_TCB_LOCK(locked_tcb);
1527 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1529 SCTP_INP_WUNLOCK(inp);
1530 SCTP_INP_INFO_RUNLOCK();
1536 * Find an association for a specific endpoint using the association id given
1537 * out in the COMM_UP notification
1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1543 * Use my the assoc_id to find a endpoint
1545 struct sctpasochead *head;
1546 struct sctp_tcb *stcb;
1549 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1550 SCTP_PRINTF("TSNH ep_associd0\n");
1553 id = (uint32_t)asoc_id;
1554 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1556 /* invalid id TSNH */
1557 SCTP_PRINTF("TSNH ep_associd1\n");
1560 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1561 if (stcb->asoc.assoc_id == id) {
1562 if (inp != stcb->sctp_ep) {
1564 * some other guy has the same id active (id
1567 SCTP_PRINTF("TSNH ep_associd2\n");
1570 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1574 SCTP_TCB_LOCK(stcb);
1583 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1585 struct sctp_tcb *stcb;
1587 SCTP_INP_RLOCK(inp);
1588 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1589 SCTP_INP_RUNLOCK(inp);
1594 * Endpoint probe expects that the INP_INFO is locked.
1596 static struct sctp_inpcb *
1597 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1598 uint16_t lport, uint32_t vrf_id)
1600 struct sctp_inpcb *inp;
1601 struct sctp_laddr *laddr;
1603 struct sockaddr_in *sin;
1606 struct sockaddr_in6 *sin6;
1607 struct sockaddr_in6 *intf_addr6;
1617 switch (nam->sa_family) {
1620 sin = (struct sockaddr_in *)nam;
1625 sin6 = (struct sockaddr_in6 *)nam;
1629 /* unsupported family */
1636 LIST_FOREACH(inp, head, sctp_hash) {
1637 SCTP_INP_RLOCK(inp);
1638 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1639 SCTP_INP_RUNLOCK(inp);
1642 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1643 (inp->sctp_lport == lport)) {
1645 switch (nam->sa_family) {
1648 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1649 SCTP_IPV6_V6ONLY(inp)) {
1651 * IPv4 on a IPv6 socket with ONLY
1654 SCTP_INP_RUNLOCK(inp);
1657 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1658 &sin->sin_addr) != 0) {
1659 SCTP_INP_RUNLOCK(inp);
1667 * A V6 address and the endpoint is NOT
1670 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1671 SCTP_INP_RUNLOCK(inp);
1674 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1675 &sin6->sin6_addr) != 0) {
1676 SCTP_INP_RUNLOCK(inp);
1684 /* does a VRF id match? */
1686 if (inp->def_vrf_id == vrf_id)
1689 SCTP_INP_RUNLOCK(inp);
1694 SCTP_INP_RUNLOCK(inp);
1696 switch (nam->sa_family) {
1699 if (sin->sin_addr.s_addr == INADDR_ANY) {
1700 /* Can't hunt for one that has no address specified */
1707 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1708 /* Can't hunt for one that has no address specified */
1717 * ok, not bound to all so see if we can find a EP bound to this
1720 LIST_FOREACH(inp, head, sctp_hash) {
1721 SCTP_INP_RLOCK(inp);
1722 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1723 SCTP_INP_RUNLOCK(inp);
1726 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1727 SCTP_INP_RUNLOCK(inp);
1731 * Ok this could be a likely candidate, look at all of its
1734 if (inp->sctp_lport != lport) {
1735 SCTP_INP_RUNLOCK(inp);
1738 /* does a VRF id match? */
1740 if (inp->def_vrf_id == vrf_id)
1744 SCTP_INP_RUNLOCK(inp);
1747 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1748 if (laddr->ifa == NULL) {
1749 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1753 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1754 (void *)laddr->ifa);
1755 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1756 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1759 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1760 /* possible, see if it matches */
1761 switch (nam->sa_family) {
1764 if (sin->sin_addr.s_addr ==
1765 laddr->ifa->address.sin.sin_addr.s_addr) {
1766 SCTP_INP_RUNLOCK(inp);
1773 intf_addr6 = &laddr->ifa->address.sin6;
1774 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1776 SCTP_INP_RUNLOCK(inp);
1784 SCTP_INP_RUNLOCK(inp);
1789 static struct sctp_inpcb *
1790 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1792 struct sctppcbhead *head;
1793 struct sctp_inpcb *t_inp;
1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1797 SCTP_BASE_INFO(hashmark))];
1798 LIST_FOREACH(t_inp, head, sctp_hash) {
1799 if (t_inp->sctp_lport != lport) {
1802 /* is it in the VRF in question */
1804 if (t_inp->def_vrf_id == vrf_id)
1809 /* This one is in use. */
1810 /* check the v6/v4 binding issue */
1811 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1812 SCTP_IPV6_V6ONLY(t_inp)) {
1813 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1814 /* collision in V6 space */
1817 /* inp is BOUND_V4 no conflict */
1820 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1821 /* t_inp is bound v4 and v6, conflict always */
1824 /* t_inp is bound only V4 */
1825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1826 SCTP_IPV6_V6ONLY(inp)) {
1830 /* else fall through to conflict */
1838 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1840 /* For 1-2-1 with port reuse */
1841 struct sctppcbhead *head;
1842 struct sctp_inpcb *tinp, *ninp;
1844 SCTP_INP_INFO_WLOCK_ASSERT();
1845 SCTP_INP_WLOCK_ASSERT(inp);
1847 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1848 /* only works with port reuse on */
1851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1854 SCTP_INP_WUNLOCK(inp);
1855 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1856 SCTP_BASE_INFO(hashmark))];
1857 /* Kick out all non-listeners to the TCP hash */
1858 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1859 if (tinp->sctp_lport != inp->sctp_lport) {
1862 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1865 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1868 if (SCTP_IS_LISTENING(tinp)) {
1871 SCTP_INP_WLOCK(tinp);
1872 LIST_REMOVE(tinp, sctp_hash);
1873 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1874 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1875 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1876 SCTP_INP_WUNLOCK(tinp);
1878 SCTP_INP_WLOCK(inp);
1879 /* Pull from where he was */
1880 LIST_REMOVE(inp, sctp_hash);
1881 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1883 LIST_INSERT_HEAD(head, inp, sctp_hash);
1888 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1892 * First we check the hash table to see if someone has this port
1893 * bound with just the port.
1895 struct sctp_inpcb *inp;
1896 struct sctppcbhead *head;
1900 struct sockaddr_in *sin;
1903 struct sockaddr_in6 *sin6;
1906 switch (nam->sa_family) {
1909 sin = (struct sockaddr_in *)nam;
1910 lport = sin->sin_port;
1915 sin6 = (struct sockaddr_in6 *)nam;
1916 lport = sin6->sin6_port;
1923 * I could cheat here and just cast to one of the types but we will
1924 * do it right. It also provides the check against an Unsupported
1927 /* Find the head of the ALLADDR chain */
1928 if (have_lock == 0) {
1929 SCTP_INP_INFO_RLOCK();
1931 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1932 SCTP_BASE_INFO(hashmark))];
1933 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1936 * If the TCP model exists it could be that the main listening
1937 * endpoint is gone but there still exists a connected socket for
1938 * this guy. If so we can return the first one that we find. This
1939 * may NOT be the correct one so the caller should be wary on the
1940 * returned INP. Currently the only caller that sets find_tcp_pool
1941 * is in bindx where we are verifying that a user CAN bind the
1942 * address. He either has bound it already, or someone else has, or
1943 * its open to bind, so this is good enough.
1945 if (inp == NULL && find_tcp_pool) {
1946 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1947 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1948 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1955 SCTP_INP_INCR_REF(inp);
1957 if (have_lock == 0) {
1958 SCTP_INP_INFO_RUNLOCK();
1964 * Find an association for an endpoint with the pointer to whom you want to
1965 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1966 * need to change the *to to some other struct like a mbuf...
1969 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1970 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1973 struct sctp_inpcb *inp = NULL;
1974 struct sctp_tcb *stcb;
1976 SCTP_INP_INFO_RLOCK();
1977 if (find_tcp_pool) {
1978 if (inp_p != NULL) {
1979 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1982 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1986 SCTP_INP_INFO_RUNLOCK();
1990 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1991 if (inp_p != NULL) {
1994 SCTP_INP_INFO_RUNLOCK();
1999 * ok, we have an endpoint, now lets find the assoc for it (if any)
2000 * we now place the source address or from in the to of the find
2001 * endpoint call. Since in reality this chain is used from the
2002 * inbound packet side.
2004 if (inp_p != NULL) {
2005 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2008 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2015 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2016 * find all addresses that the sender has specified in any address list. Each
2017 * address will be used to lookup the TCB and see if one exits.
2019 static struct sctp_tcb *
2020 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2021 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2022 struct sockaddr *dst)
2024 struct sctp_paramhdr *phdr, param_buf;
2025 #if defined(INET) || defined(INET6)
2026 struct sctp_tcb *stcb;
2031 struct sockaddr_in sin4;
2034 struct sockaddr_in6 sin6;
2038 memset(&sin4, 0, sizeof(sin4));
2039 sin4.sin_len = sizeof(sin4);
2040 sin4.sin_family = AF_INET;
2041 sin4.sin_port = sh->src_port;
2044 memset(&sin6, 0, sizeof(sin6));
2045 sin6.sin6_len = sizeof(sin6);
2046 sin6.sin6_family = AF_INET6;
2047 sin6.sin6_port = sh->src_port;
2050 offset += sizeof(struct sctp_init_chunk);
2052 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
2053 while (phdr != NULL) {
2054 /* now we must see if we want the parameter */
2055 #if defined(INET) || defined(INET6)
2056 ptype = ntohs(phdr->param_type);
2058 plen = ntohs(phdr->param_length);
2063 if (ptype == SCTP_IPV4_ADDRESS &&
2064 plen == sizeof(struct sctp_ipv4addr_param)) {
2065 /* Get the rest of the address */
2066 struct sctp_ipv4addr_param ip4_param, *p4;
2068 phdr = sctp_get_next_param(m, offset,
2069 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2073 p4 = (struct sctp_ipv4addr_param *)phdr;
2074 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2076 stcb = sctp_findassociation_ep_addr(inp_p,
2077 (struct sockaddr *)&sin4, netp, dst, NULL);
2084 if (ptype == SCTP_IPV6_ADDRESS &&
2085 plen == sizeof(struct sctp_ipv6addr_param)) {
2086 /* Get the rest of the address */
2087 struct sctp_ipv6addr_param ip6_param, *p6;
2089 phdr = sctp_get_next_param(m, offset,
2090 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2094 p6 = (struct sctp_ipv6addr_param *)phdr;
2095 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2097 stcb = sctp_findassociation_ep_addr(inp_p,
2098 (struct sockaddr *)&sin6, netp, dst, NULL);
2104 offset += SCTP_SIZE32(plen);
2105 phdr = sctp_get_next_param(m, offset, ¶m_buf,
2111 static struct sctp_tcb *
2112 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2113 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2114 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2117 * Use my vtag to hash. If we find it we then verify the source addr
2118 * is in the assoc. If all goes well we save a bit on rec of a
2121 struct sctpasochead *head;
2122 struct sctp_nets *net;
2123 struct sctp_tcb *stcb;
2125 SCTP_INP_INFO_RLOCK();
2126 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2127 SCTP_BASE_INFO(hashasocmark))];
2128 LIST_FOREACH(stcb, head, sctp_asocs) {
2129 SCTP_INP_RLOCK(stcb->sctp_ep);
2130 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2131 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2134 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2135 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2138 SCTP_TCB_LOCK(stcb);
2139 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2140 if (stcb->asoc.my_vtag == vtag) {
2142 if (stcb->rport != rport) {
2143 SCTP_TCB_UNLOCK(stcb);
2146 if (stcb->sctp_ep->sctp_lport != lport) {
2147 SCTP_TCB_UNLOCK(stcb);
2150 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2151 SCTP_TCB_UNLOCK(stcb);
2154 /* RRS:Need toaddr check here */
2155 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2156 /* Endpoint does not own this address */
2157 SCTP_TCB_UNLOCK(stcb);
2162 * If we have both vtags that's all we match
2165 if (stcb->asoc.peer_vtag == remote_tag) {
2167 * If both tags match we consider it
2168 * conclusive and check NO
2169 * source/destination addresses
2174 if (skip_src_check) {
2177 *netp = sctp_findnet(stcb, from);
2179 *netp = NULL; /* unknown */
2182 *inp_p = stcb->sctp_ep;
2183 SCTP_INP_INFO_RUNLOCK();
2186 net = sctp_findnet(stcb, from);
2190 SCTP_STAT_INCR(sctps_vtagexpress);
2191 *inp_p = stcb->sctp_ep;
2192 SCTP_INP_INFO_RUNLOCK();
2196 * not him, this should only happen in rare
2197 * cases so I peg it.
2199 SCTP_STAT_INCR(sctps_vtagbogus);
2202 SCTP_TCB_UNLOCK(stcb);
2204 SCTP_INP_INFO_RUNLOCK();
2209 * Find an association with the pointer to the inbound IP packet. This can be
2210 * a IPv4 or IPv6 packet.
2213 sctp_findassociation_addr(struct mbuf *m, int offset,
2214 struct sockaddr *src, struct sockaddr *dst,
2215 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2216 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2218 struct sctp_tcb *stcb;
2219 struct sctp_inpcb *inp;
2222 /* we only go down this path if vtag is non-zero */
2223 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2224 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2231 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2235 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2238 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2239 if (stcb == NULL && inp) {
2240 /* Found a EP but not this address */
2241 if ((ch->chunk_type == SCTP_INITIATION) ||
2242 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2244 * special hook, we do NOT return linp or an
2245 * association that is linked to an existing
2246 * association that is under the TCP pool (i.e. no
2247 * listener exists). The endpoint finding routine
2248 * will always find a listener before examining the
2251 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2257 stcb = sctp_findassociation_special_addr(m,
2258 offset, sh, &inp, netp, dst);
2259 if (inp_p != NULL) {
2264 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2269 * lookup an association by an ASCONF lookup address.
2270 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2273 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2274 struct sockaddr *dst, struct sctphdr *sh,
2275 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2277 struct sctp_tcb *stcb;
2278 union sctp_sockstore remote_store;
2279 struct sctp_paramhdr param_buf, *phdr;
2281 int zero_address = 0;
2283 struct sockaddr_in *sin;
2286 struct sockaddr_in6 *sin6;
2289 memset(&remote_store, 0, sizeof(remote_store));
2290 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2291 ¶m_buf, sizeof(struct sctp_paramhdr));
2293 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2297 ptype = (int)((uint32_t)ntohs(phdr->param_type));
2298 /* get the correlation address */
2301 case SCTP_IPV6_ADDRESS:
2303 /* ipv6 address param */
2304 struct sctp_ipv6addr_param *p6, p6_buf;
2306 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2309 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2310 offset + sizeof(struct sctp_asconf_chunk),
2311 &p6_buf.ph, sizeof(p6_buf));
2313 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2317 sin6 = &remote_store.sin6;
2318 sin6->sin6_family = AF_INET6;
2319 sin6->sin6_len = sizeof(*sin6);
2320 sin6->sin6_port = sh->src_port;
2321 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2322 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2328 case SCTP_IPV4_ADDRESS:
2330 /* ipv4 address param */
2331 struct sctp_ipv4addr_param *p4, p4_buf;
2333 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2336 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2337 offset + sizeof(struct sctp_asconf_chunk),
2338 &p4_buf.ph, sizeof(p4_buf));
2340 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2344 sin = &remote_store.sin;
2345 sin->sin_family = AF_INET;
2346 sin->sin_len = sizeof(*sin);
2347 sin->sin_port = sh->src_port;
2348 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2349 if (sin->sin_addr.s_addr == INADDR_ANY)
2355 /* invalid address param type */
2360 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2361 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2363 SCTP_INP_DECR_REF(*inp_p);
2366 stcb = sctp_findassociation_ep_addr(inp_p,
2367 &remote_store.sa, netp,
2374 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2375 * addresses. This way if we don't get a bind we by default pick a ephemeral
2376 * port with all addresses bound.
2379 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2382 * we get called when a new endpoint starts up. We need to allocate
2383 * the sctp_inpcb structure from the zone and init it. Mark it as
2384 * unbound and find a port that we can use as an ephemeral with
2385 * INADDR_ANY. If the user binds later no problem we can then add in
2386 * the specific addresses. And setup the default parameters for the
2390 struct sctp_inpcb *inp;
2392 struct timeval time;
2393 sctp_sharedkey_t *null_key;
2397 SCTP_INP_INFO_WLOCK();
2398 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2400 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2401 SCTP_INP_INFO_WUNLOCK();
2402 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2406 memset(inp, 0, sizeof(*inp));
2408 /* bump generations */
2409 /* setup socket pointers */
2410 inp->sctp_socket = so;
2411 inp->ip_inp.inp.inp_socket = so;
2412 inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2414 if (INP_SOCKAF(so) == AF_INET6) {
2415 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2416 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2418 if (MODULE_GLOBAL(ip6_v6only)) {
2419 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2423 inp->sctp_associd_counter = 1;
2424 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2425 inp->sctp_frag_point = 0;
2427 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2428 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2429 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2430 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2431 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2432 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2433 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2434 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2435 inp->idata_supported = 0;
2436 inp->zero_checksum = 0;
2438 inp->fibnum = so->so_fibnum;
2439 /* init the small hash table we use to track asocid <-> tcb */
2440 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2441 if (inp->sctp_asocidhash == NULL) {
2442 crfree(inp->ip_inp.inp.inp_cred);
2443 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2444 SCTP_INP_INFO_WUNLOCK();
2447 SCTP_INCR_EP_COUNT();
2448 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2449 SCTP_INP_INFO_WUNLOCK();
2451 so->so_pcb = (caddr_t)inp;
2453 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2454 /* UDP style socket */
2455 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2456 SCTP_PCB_FLAGS_UNBOUND);
2457 /* Be sure it is NON-BLOCKING IO for UDP */
2458 /* SCTP_SET_SO_NBIO(so); */
2459 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2460 /* TCP style socket */
2461 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2462 SCTP_PCB_FLAGS_UNBOUND);
2463 /* Be sure we have blocking IO by default */
2465 SCTP_CLEAR_SO_NBIO(so);
2469 * unsupported socket type (RAW, etc)- in case we missed it
2472 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2474 crfree(inp->ip_inp.inp.inp_cred);
2475 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2476 return (EOPNOTSUPP);
2478 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2479 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2480 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2481 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2482 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2483 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2484 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2485 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2486 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2488 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2489 &inp->sctp_hashmark);
2490 if (inp->sctp_tcbhash == NULL) {
2491 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2492 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2494 crfree(inp->ip_inp.inp.inp_cred);
2495 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2498 inp->def_vrf_id = vrf_id;
2500 SCTP_INP_INFO_WLOCK();
2501 SCTP_INP_LOCK_INIT(inp);
2502 rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp",
2503 RW_RECURSE | RW_DUPOK);
2504 SCTP_INP_READ_INIT(inp);
2505 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2506 /* lock the new ep */
2507 SCTP_INP_WLOCK(inp);
2509 /* add it to the info area */
2510 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2511 SCTP_INP_INFO_WUNLOCK();
2513 TAILQ_INIT(&inp->read_queue);
2514 LIST_INIT(&inp->sctp_addr_list);
2516 LIST_INIT(&inp->sctp_asoc_list);
2518 #ifdef SCTP_TRACK_FREED_ASOCS
2520 LIST_INIT(&inp->sctp_asoc_free_list);
2522 /* Init the timer structure for signature change */
2523 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2524 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2526 /* now init the actual endpoint default data */
2529 /* setup the base timeout information */
2530 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */
2531 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */
2532 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2533 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2534 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2535 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2536 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2537 /* all max/min max are in ms */
2538 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2539 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2540 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2541 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2542 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2543 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2544 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2545 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2546 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2547 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2548 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2549 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2550 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2552 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2553 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2554 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2555 /* number of streams to pre-open on a association */
2556 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2559 /* Add adaptation cookie */
2560 m->adaptation_layer_indicator = 0;
2561 m->adaptation_layer_indicator_provided = 0;
2563 /* seed random number generator */
2564 m->random_counter = 1;
2565 m->store_at = SCTP_SIGNATURE_SIZE;
2566 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2567 sctp_fill_random_store(m);
2569 /* Minimum cookie size */
2570 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2571 sizeof(struct sctp_state_cookie);
2572 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2574 /* Setup the initial secret */
2575 (void)SCTP_GETTIME_TIMEVAL(&time);
2576 m->time_of_secret_change = (unsigned int)time.tv_sec;
2578 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2579 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2581 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2583 /* How long is a cookie good for ? */
2584 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2586 * Initialize authentication parameters
2588 m->local_hmacs = sctp_default_supported_hmaclist();
2589 m->local_auth_chunks = sctp_alloc_chunklist();
2590 if (inp->asconf_supported) {
2591 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2592 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2594 m->default_dscp = 0;
2596 m->default_flowlabel = 0;
2598 m->port = 0; /* encapsulation disabled by default */
2599 LIST_INIT(&m->shared_keys);
2600 /* add default NULL key as key id 0 */
2601 null_key = sctp_alloc_sharedkey();
2602 sctp_insert_sharedkey(&m->shared_keys, null_key);
2603 SCTP_INP_WUNLOCK(inp);
2604 #ifdef SCTP_LOG_CLOSING
2605 sctp_log_closing(inp, NULL, 12);
2611 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2612 struct sctp_tcb *stcb)
2614 struct sctp_nets *net;
2615 uint16_t lport, rport;
2616 struct sctppcbhead *head;
2617 struct sctp_laddr *laddr, *oladdr;
2619 atomic_add_int(&stcb->asoc.refcnt, 1);
2620 SCTP_TCB_UNLOCK(stcb);
2621 SCTP_INP_INFO_WLOCK();
2622 SCTP_INP_WLOCK(old_inp);
2623 SCTP_INP_WLOCK(new_inp);
2624 SCTP_TCB_LOCK(stcb);
2625 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2628 if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2629 new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS;
2630 if (old_inp->ip_inp.inp.in6p_outputopts) {
2631 new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT);
2635 #if defined(INET) && defined(INET6)
2640 new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos;
2641 new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl;
2644 new_inp->sctp_ep.time_of_secret_change =
2645 old_inp->sctp_ep.time_of_secret_change;
2646 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2647 sizeof(old_inp->sctp_ep.secret_key));
2648 new_inp->sctp_ep.current_secret_number =
2649 old_inp->sctp_ep.current_secret_number;
2650 new_inp->sctp_ep.last_secret_number =
2651 old_inp->sctp_ep.last_secret_number;
2652 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2654 /* make it so new data pours into the new socket */
2655 stcb->sctp_socket = new_inp->sctp_socket;
2656 stcb->sctp_ep = new_inp;
2658 /* Copy the port across */
2659 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2660 rport = stcb->rport;
2661 /* Pull the tcb from the old association */
2662 LIST_REMOVE(stcb, sctp_tcbhash);
2663 LIST_REMOVE(stcb, sctp_tcblist);
2664 if (stcb->asoc.in_asocid_hash) {
2665 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2667 /* Now insert the new_inp into the TCP connected hash */
2668 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2670 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2671 /* Its safe to access */
2672 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2674 /* Now move the tcb into the endpoint list */
2675 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2677 * Question, do we even need to worry about the ep-hash since we
2678 * only have one connection? Probably not :> so lets get rid of it
2679 * and not suck up any kernel memory in that.
2681 if (stcb->asoc.in_asocid_hash) {
2682 struct sctpasochead *lhd;
2684 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2685 new_inp->hashasocidmark)];
2686 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2688 /* Ok. Let's restart timer. */
2689 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2690 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2694 SCTP_INP_INFO_WUNLOCK();
2695 if (new_inp->sctp_tcbhash != NULL) {
2696 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2697 new_inp->sctp_tcbhash = NULL;
2699 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2700 /* Subset bound, so copy in the laddr list from the old_inp */
2701 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2702 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2703 if (laddr == NULL) {
2705 * Gak, what can we do? This assoc is really
2706 * HOSED. We probably should send an abort
2709 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2712 SCTP_INCR_LADDR_COUNT();
2713 memset(laddr, 0, sizeof(*laddr));
2714 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2715 laddr->ifa = oladdr->ifa;
2716 atomic_add_int(&laddr->ifa->refcount, 1);
2717 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2719 new_inp->laddr_count++;
2720 if (oladdr == stcb->asoc.last_used_address) {
2721 stcb->asoc.last_used_address = laddr;
2725 /* Now any running timers need to be adjusted. */
2726 if (stcb->asoc.dack_timer.ep == old_inp) {
2727 SCTP_INP_DECR_REF(old_inp);
2728 stcb->asoc.dack_timer.ep = new_inp;
2729 SCTP_INP_INCR_REF(new_inp);
2731 if (stcb->asoc.asconf_timer.ep == old_inp) {
2732 SCTP_INP_DECR_REF(old_inp);
2733 stcb->asoc.asconf_timer.ep = new_inp;
2734 SCTP_INP_INCR_REF(new_inp);
2736 if (stcb->asoc.strreset_timer.ep == old_inp) {
2737 SCTP_INP_DECR_REF(old_inp);
2738 stcb->asoc.strreset_timer.ep = new_inp;
2739 SCTP_INP_INCR_REF(new_inp);
2741 if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2742 SCTP_INP_DECR_REF(old_inp);
2743 stcb->asoc.shut_guard_timer.ep = new_inp;
2744 SCTP_INP_INCR_REF(new_inp);
2746 if (stcb->asoc.autoclose_timer.ep == old_inp) {
2747 SCTP_INP_DECR_REF(old_inp);
2748 stcb->asoc.autoclose_timer.ep = new_inp;
2749 SCTP_INP_INCR_REF(new_inp);
2751 if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2752 SCTP_INP_DECR_REF(old_inp);
2753 stcb->asoc.delete_prim_timer.ep = new_inp;
2754 SCTP_INP_INCR_REF(new_inp);
2756 /* now what about the nets? */
2757 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2758 if (net->pmtu_timer.ep == old_inp) {
2759 SCTP_INP_DECR_REF(old_inp);
2760 net->pmtu_timer.ep = new_inp;
2761 SCTP_INP_INCR_REF(new_inp);
2763 if (net->hb_timer.ep == old_inp) {
2764 SCTP_INP_DECR_REF(old_inp);
2765 net->hb_timer.ep = new_inp;
2766 SCTP_INP_INCR_REF(new_inp);
2768 if (net->rxt_timer.ep == old_inp) {
2769 SCTP_INP_DECR_REF(old_inp);
2770 net->rxt_timer.ep = new_inp;
2771 SCTP_INP_INCR_REF(new_inp);
2774 SCTP_INP_WUNLOCK(new_inp);
2775 SCTP_INP_WUNLOCK(old_inp);
2779 * insert an laddr entry with the given ifa for the desired list
2782 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2784 struct sctp_laddr *laddr;
2786 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2787 if (laddr == NULL) {
2788 /* out of memory? */
2789 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2792 SCTP_INCR_LADDR_COUNT();
2793 memset(laddr, 0, sizeof(*laddr));
2794 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2796 laddr->action = act;
2797 atomic_add_int(&ifa->refcount, 1);
2799 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2805 * Remove an laddr entry from the local address list (on an assoc)
2808 sctp_remove_laddr(struct sctp_laddr *laddr)
2811 /* remove from the list */
2812 LIST_REMOVE(laddr, sctp_nxt_addr);
2813 sctp_free_ifa(laddr->ifa);
2814 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2815 SCTP_DECR_LADDR_COUNT();
2819 * Bind the socket, with the PCB and global info locks held. Note, if a
2820 * socket address is specified, the PCB lock may be dropped and re-acquired.
2822 * sctp_ifap is used to bypass normal local address validation checks.
2825 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr,
2826 struct sctp_ifa *sctp_ifap, struct thread *td)
2828 /* bind a ep to a socket address */
2829 struct sctppcbhead *head;
2830 struct sctp_inpcb *inp_tmp;
2831 struct inpcb *ip_inp;
2832 int port_reuse_active = 0;
2838 KASSERT(td != NULL, ("%s: null thread", __func__));
2843 ip_inp = &inp->ip_inp.inp;
2845 SCTP_INP_INFO_WLOCK_ASSERT();
2846 SCTP_INP_WLOCK_ASSERT(inp);
2850 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2851 ntohs(((struct sockaddr_in *)addr)->sin_port));
2852 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2853 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2856 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2858 /* already did a bind, subsequent binds NOT allowed ! */
2859 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2863 switch (addr->sa_family) {
2867 struct sockaddr_in *sin;
2869 /* IPV6_V6ONLY socket? */
2870 if (SCTP_IPV6_V6ONLY(inp)) {
2872 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2875 if (addr->sa_len != sizeof(*sin)) {
2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2881 sin = (struct sockaddr_in *)addr;
2882 lport = sin->sin_port;
2884 * For LOOPBACK the prison_local_ip4() call
2885 * will transmute the ip address to the
2888 if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) {
2889 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2892 if (sin->sin_addr.s_addr != INADDR_ANY) {
2902 * Only for pure IPv6 Address. (No IPv4
2905 struct sockaddr_in6 *sin6;
2907 sin6 = (struct sockaddr_in6 *)addr;
2908 if (addr->sa_len != sizeof(*sin6)) {
2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2913 lport = sin6->sin6_port;
2915 * For LOOPBACK the prison_local_ip6() call
2916 * will transmute the ipv6 address to the
2919 if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr,
2920 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2924 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2926 /* KAME hack: embed scopeid */
2927 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2929 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2933 /* this must be cleared for ifa_ifwithaddr() */
2934 sin6->sin6_scope_id = 0;
2939 error = EAFNOSUPPORT;
2940 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2944 /* Setup a vrf_id to be the default for the non-bind-all case. */
2945 vrf_id = inp->def_vrf_id;
2949 * Did the caller specify a port? if so we must see if an ep
2950 * already has this one bound.
2952 /* got to be root to get at low ports */
2953 if (ntohs(lport) < IPPORT_RESERVED &&
2954 (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
2957 SCTP_INP_INCR_REF(inp);
2958 SCTP_INP_WUNLOCK(inp);
2960 vrf_id = inp->def_vrf_id;
2961 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2962 if (inp_tmp != NULL) {
2964 * lock guy returned and lower count note
2965 * that we are not bound so inp_tmp should
2966 * NEVER be inp. And it is this inp
2967 * (inp_tmp) that gets the reference bump,
2968 * so we must lower it.
2970 SCTP_INP_DECR_REF(inp_tmp);
2972 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2973 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2975 * Ok, must be one-2-one and
2976 * allowing port re-use
2978 port_reuse_active = 1;
2979 goto continue_anyway;
2981 SCTP_INP_WLOCK(inp);
2982 SCTP_INP_DECR_REF(inp);
2984 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2988 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2989 if (inp_tmp != NULL) {
2991 * lock guy returned and lower count note
2992 * that we are not bound so inp_tmp should
2993 * NEVER be inp. And it is this inp
2994 * (inp_tmp) that gets the reference bump,
2995 * so we must lower it.
2997 SCTP_INP_DECR_REF(inp_tmp);
2999 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3000 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3002 * Ok, must be one-2-one and
3003 * allowing port re-use
3005 port_reuse_active = 1;
3006 goto continue_anyway;
3008 SCTP_INP_WLOCK(inp);
3009 SCTP_INP_DECR_REF(inp);
3011 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3016 SCTP_INP_WLOCK(inp);
3017 SCTP_INP_DECR_REF(inp);
3019 /* verify that no lport is not used by a singleton */
3020 if ((port_reuse_active == 0) &&
3021 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3022 /* Sorry someone already has this one bound */
3023 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3024 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3025 port_reuse_active = 1;
3028 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3034 uint16_t first, last, candidate;
3037 if (ip_inp->inp_flags & INP_HIGHPORT) {
3038 first = MODULE_GLOBAL(ipport_hifirstauto);
3039 last = MODULE_GLOBAL(ipport_hilastauto);
3040 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3041 if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
3042 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3045 first = MODULE_GLOBAL(ipport_lowfirstauto);
3046 last = MODULE_GLOBAL(ipport_lowlastauto);
3048 first = MODULE_GLOBAL(ipport_firstauto);
3049 last = MODULE_GLOBAL(ipport_lastauto);
3058 count = last - first + 1; /* number of candidates */
3059 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3062 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3063 lport = htons(candidate);
3068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3071 if (candidate == last)
3074 candidate = candidate + 1;
3077 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3078 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3080 * this really should not happen. The guy did a non-blocking
3081 * bind and then did a close at the same time.
3084 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3087 /* ok we look clear to give out this port, so lets setup the binding */
3089 /* binding to all addresses, so just set in the proper flags */
3090 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3091 /* set the automatic addr changes from kernel flag */
3092 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3093 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3094 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3096 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3099 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3100 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3102 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3105 * set the automatic mobility_base from kernel flag (by
3108 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3109 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3112 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3113 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3116 * set the automatic mobility_fasthandoff from kernel flag
3119 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3120 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3121 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3123 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3124 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3128 * bind specific, make sure flags is off and add a new
3129 * address structure to the sctp_addr_list inside the ep
3132 * We will need to allocate one and insert it at the head.
3133 * The socketopt call can just insert new addresses in there
3134 * as well. It will also have to do the embed scope kame
3135 * hack too (before adding).
3137 struct sctp_ifa *ifa;
3138 union sctp_sockstore store;
3140 memset(&store, 0, sizeof(store));
3141 switch (addr->sa_family) {
3144 memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3145 store.sin.sin_port = 0;
3150 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3151 store.sin6.sin6_port = 0;
3158 * first find the interface with the bound address need to
3159 * zero out the port to find the address! yuck! can't do
3160 * this earlier since need port for sctp_pcb_findep()
3162 if (sctp_ifap != NULL) {
3166 * Note for BSD we hit here always other O/S's will
3167 * pass things in via the sctp_ifap argument.
3169 ifa = sctp_find_ifa_by_addr(&store.sa,
3170 vrf_id, SCTP_ADDR_NOT_LOCKED);
3173 error = EADDRNOTAVAIL;
3174 /* Can't find an interface with that address */
3175 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3179 if (addr->sa_family == AF_INET6) {
3180 /* GAK, more FIXME IFA lock? */
3181 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3182 /* Can't bind a non-existent addr. */
3184 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3189 /* we're not bound all */
3190 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3191 /* allow bindx() to send ASCONF's for binding changes */
3192 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3193 /* clear automatic addr changes from kernel flag */
3194 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3196 /* add this address to the endpoint list */
3197 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3202 /* find the bucket */
3203 if (port_reuse_active) {
3204 /* Put it into tcp 1-2-1 hash */
3205 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3206 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3208 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3210 /* put it in the bucket */
3211 LIST_INSERT_HEAD(head, inp, sctp_hash);
3212 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3213 (void *)head, ntohs(lport), port_reuse_active);
3214 /* set in the port */
3215 inp->sctp_lport = lport;
3217 /* turn off just the unbound flag */
3218 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0,
3219 ("%s: inp %p is already bound", __func__, inp));
3220 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3226 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3227 struct sctp_ifa *sctp_ifap, struct thread *td)
3229 struct sctp_inpcb *inp;
3233 SCTP_INP_INFO_WLOCK();
3234 SCTP_INP_WLOCK(inp);
3235 error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td);
3236 SCTP_INP_WUNLOCK(inp);
3237 SCTP_INP_INFO_WUNLOCK();
3242 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3244 struct sctp_iterator *it, *nit;
3247 * We enter with the only the ITERATOR_LOCK in place and a write
3248 * lock on the inp_info stuff.
3250 it = sctp_it_ctl.cur_it;
3251 if (it && (it->vn != curvnet)) {
3252 /* Its not looking at our VNET */
3255 if (it && (it->inp == inp)) {
3257 * This is tricky and we hold the iterator lock, but when it
3258 * returns and gets the lock (when we release it) the
3259 * iterator will try to operate on inp. We need to stop that
3260 * from happening. But of course the iterator has a
3261 * reference on the stcb and inp. We can mark it and it will
3264 * If its a single iterator situation, we set the end
3265 * iterator flag. Otherwise we set the iterator to go to the
3269 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3270 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3272 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3276 * Now go through and remove any single reference to our inp that
3277 * may be still pending on the list
3279 SCTP_IPI_ITERATOR_WQ_LOCK();
3280 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3281 if (it->vn != curvnet) {
3284 if (it->inp == inp) {
3285 /* This one points to me is it inp specific? */
3286 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3287 /* Remove and free this one */
3288 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3290 if (it->function_atend != NULL) {
3291 (*it->function_atend) (it->pointer, it->val);
3293 SCTP_FREE(it, SCTP_M_ITER);
3295 it->inp = LIST_NEXT(it->inp, sctp_list);
3297 SCTP_INP_INCR_REF(it->inp);
3301 * When its put in the refcnt is incremented so decr
3304 SCTP_INP_DECR_REF(inp);
3307 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3310 /* release sctp_inpcb unbind the port */
3312 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3315 * Here we free a endpoint. We must find it (if it is in the Hash
3316 * table) and remove it from there. Then we must also find it in the
3317 * overall list and remove it from there. After all removals are
3318 * complete then any timer has to be stopped. Then start the actual
3319 * freeing. a) Any local lists. b) Any associations. c) The hash of
3320 * all associations. d) finally the ep itself.
3322 struct sctp_tcb *stcb, *nstcb;
3323 struct sctp_laddr *laddr, *nladdr;
3324 struct inpcb *ip_pcb;
3326 int being_refed = 0;
3327 struct sctp_queued_to_read *sq, *nsq;
3329 sctp_sharedkey_t *shared_key, *nshared_key;
3331 #ifdef SCTP_LOG_CLOSING
3332 sctp_log_closing(inp, NULL, 0);
3334 SCTP_ITERATOR_LOCK();
3335 /* mark any iterators on the list or being processed */
3336 sctp_iterator_inp_being_freed(inp);
3337 SCTP_ITERATOR_UNLOCK();
3339 SCTP_ASOC_CREATE_LOCK(inp);
3340 SCTP_INP_INFO_WLOCK();
3341 SCTP_INP_WLOCK(inp);
3342 so = inp->sctp_socket;
3343 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0,
3344 ("%s: inp %p still has socket", __func__, inp));
3345 KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0,
3346 ("%s: double free of inp %p", __func__, inp));
3347 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3348 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3349 /* socket is gone, so no more wakeups allowed */
3350 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3351 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3352 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3354 /* First time through we have the socket lock, after that no more. */
3355 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3356 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3359 sctp_m_freem(inp->control);
3360 inp->control = NULL;
3363 sctp_m_freem(inp->pkt);
3366 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3367 * here but I will be nice :> (i.e.
3369 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3373 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) {
3374 SCTP_TCB_LOCK(stcb);
3375 /* Disconnect the socket please. */
3376 stcb->sctp_socket = NULL;
3377 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET);
3378 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3379 /* Skip guys being freed */
3381 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3383 * Special case - we did not start a
3384 * kill timer on the asoc due to it
3385 * was not closed. So go ahead and
3388 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
3389 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3391 SCTP_TCB_UNLOCK(stcb);
3394 if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
3395 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) &&
3396 (stcb->asoc.total_output_queue_size == 0)) {
3398 * If we have data in queue, we don't want
3399 * to just free since the app may have done,
3400 * send()/close or connect/send/close. And
3401 * it wants the data to get across first.
3403 /* Just abandon things in the front states */
3404 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE,
3405 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3410 if ((stcb->asoc.size_on_reasm_queue > 0) ||
3411 (stcb->asoc.control_pdapi) ||
3412 (stcb->asoc.size_on_all_streams > 0) ||
3413 ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) {
3414 /* Left with Data unread */
3415 struct mbuf *op_err;
3417 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3418 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3419 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3420 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3421 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3422 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3423 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3425 if (sctp_free_assoc(inp, stcb,
3426 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3430 } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
3431 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
3432 (stcb->asoc.stream_queue_cnt == 0)) {
3433 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) {
3436 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
3437 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3438 struct sctp_nets *netp;
3441 * there is nothing queued to send,
3442 * so I send shutdown
3444 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3445 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3446 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3448 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
3449 sctp_stop_timers_for_shutdown(stcb);
3450 if (stcb->asoc.alternate) {
3451 netp = stcb->asoc.alternate;
3453 netp = stcb->asoc.primary_destination;
3455 sctp_send_shutdown(stcb, netp);
3456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
3458 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL);
3459 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3462 /* mark into shutdown pending */
3463 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
3464 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL);
3465 if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, &stcb->asoc)) {
3466 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
3468 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
3469 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
3470 (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3471 struct mbuf *op_err;
3474 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3475 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3476 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3477 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3478 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3479 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3480 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3482 if (sctp_free_assoc(inp, stcb,
3483 SCTP_PCBFREE_NOFORCE,
3484 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3489 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3493 SCTP_TCB_UNLOCK(stcb);
3495 /* now is there some left in our SHUTDOWN state? */
3497 #ifdef SCTP_LOG_CLOSING
3498 sctp_log_closing(inp, NULL, 2);
3500 inp->sctp_socket = NULL;
3501 SCTP_INP_WUNLOCK(inp);
3502 SCTP_ASOC_CREATE_UNLOCK(inp);
3503 SCTP_INP_INFO_WUNLOCK();
3507 inp->sctp_socket = NULL;
3508 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
3510 * ok, this guy has been bound. It's port is somewhere in
3511 * the SCTP_BASE_INFO(hash table). Remove it!
3513 LIST_REMOVE(inp, sctp_hash);
3514 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3518 * If there is a timer running to kill us, forget it, since it may
3519 * have a contest on the INP lock.. which would cause us to die ...
3522 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) {
3523 SCTP_TCB_LOCK(stcb);
3524 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3525 /* Disconnect the socket please */
3526 stcb->sctp_socket = NULL;
3527 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET);
3529 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3530 if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3531 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
3532 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3535 SCTP_TCB_UNLOCK(stcb);
3538 /* Free associations that are NOT killing us */
3539 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) &&
3540 ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3541 struct mbuf *op_err;
3543 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3544 stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3545 sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED);
3546 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3547 } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3549 SCTP_TCB_UNLOCK(stcb);
3552 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
3553 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3554 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3556 if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
3557 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3562 /* Ok we have someone out there that will kill us */
3563 #ifdef SCTP_LOG_CLOSING
3564 sctp_log_closing(inp, NULL, 3);
3566 SCTP_INP_WUNLOCK(inp);
3567 SCTP_ASOC_CREATE_UNLOCK(inp);
3568 SCTP_INP_INFO_WUNLOCK();
3571 if (SCTP_INP_LOCK_CONTENDED(inp))
3573 if (SCTP_INP_READ_CONTENDED(inp))
3575 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3577 /* NOTE: 0 refcount also means no timers are referencing us. */
3578 if ((inp->refcount) ||
3580 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3581 #ifdef SCTP_LOG_CLOSING
3582 sctp_log_closing(inp, NULL, 4);
3584 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3585 SCTP_INP_WUNLOCK(inp);
3586 SCTP_ASOC_CREATE_UNLOCK(inp);
3587 SCTP_INP_INFO_WUNLOCK();
3590 inp->sctp_ep.signature_change.type = 0;
3591 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3593 * Remove it from the list .. last thing we need a lock for.
3595 LIST_REMOVE(inp, sctp_list);
3596 SCTP_INP_WUNLOCK(inp);
3597 SCTP_ASOC_CREATE_UNLOCK(inp);
3598 SCTP_INP_INFO_WUNLOCK();
3600 #ifdef SCTP_LOG_CLOSING
3601 sctp_log_closing(inp, NULL, 5);
3603 if ((inp->sctp_asocidhash) != NULL) {
3604 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3605 inp->sctp_asocidhash = NULL;
3607 /* sa_ignore FREED_MEMORY */
3608 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3609 /* Its only abandoned if it had data left */
3611 SCTP_STAT_INCR(sctps_left_abandon);
3613 TAILQ_REMOVE(&inp->read_queue, sq, next);
3614 sctp_free_remote_addr(sq->whoFrom);
3616 so->so_rcv.sb_cc -= sq->length;
3618 sctp_m_freem(sq->data);
3622 * no need to free the net count, since at this point all
3625 sctp_free_a_readq(NULL, sq);
3627 /* Now the sctp_pcb things */
3629 * free each asoc if it is not already closed/free. we can't use the
3630 * macro here since le_next will get freed as part of the
3631 * sctp_free_assoc() call.
3633 if (ip_pcb->inp_options) {
3634 (void)sctp_m_free(ip_pcb->inp_options);
3635 ip_pcb->inp_options = 0;
3638 if (ip_pcb->inp_vflag & INP_IPV6) {
3639 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3642 ip_pcb->inp_vflag = 0;
3643 /* free up authentication fields */
3644 if (inp->sctp_ep.local_auth_chunks != NULL)
3645 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3646 if (inp->sctp_ep.local_hmacs != NULL)
3647 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3649 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3650 LIST_REMOVE(shared_key, next);
3651 sctp_free_sharedkey(shared_key);
3652 /* sa_ignore FREED_MEMORY */
3656 * if we have an address list the following will free the list of
3657 * ifaddr's that are set into this ep. Again macro limitations here,
3658 * since the LIST_FOREACH could be a bad idea.
3660 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3661 sctp_remove_laddr(laddr);
3664 #ifdef SCTP_TRACK_FREED_ASOCS
3666 LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) {
3667 LIST_REMOVE(stcb, sctp_tcblist);
3668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
3669 SCTP_DECR_ASOC_COUNT();
3671 /* *** END TEMP CODE *** */
3673 /* Now lets see about freeing the EP hash table. */
3674 if (inp->sctp_tcbhash != NULL) {
3675 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3676 inp->sctp_tcbhash = NULL;
3678 /* Now we must put the ep memory back into the zone pool */
3679 crfree(inp->ip_inp.inp.inp_cred);
3680 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3681 SCTP_INP_LOCK_DESTROY(inp);
3682 SCTP_INP_READ_DESTROY(inp);
3683 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3684 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3685 SCTP_DECR_EP_COUNT();
3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3691 struct sctp_nets *net;
3693 /* locate the address */
3694 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3695 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3702 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3704 struct sctp_ifa *sctp_ifa;
3706 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3715 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3716 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3720 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3721 struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3724 * The following is redundant to the same lines in the
3725 * sctp_aloc_assoc() but is needed since others call the add address
3728 struct sctp_nets *net, *netfirst;
3731 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3733 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3735 netfirst = sctp_findnet(stcb, newaddr);
3738 * Lie and return ok, we don't want to make the association
3739 * go away for this behavior. It will happen in the TCP
3740 * model in a connected socket. It does not reach the hash
3741 * table until after the association is built so it can't be
3742 * found. Mark as reachable, since the initial creation will
3743 * have been cleared and the NOT_IN_ASSOC flag will have
3744 * been added... and we don't want to end up removing it
3747 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3748 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3749 SCTP_ADDR_UNCONFIRMED);
3751 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3757 switch (newaddr->sa_family) {
3761 struct sockaddr_in *sin;
3763 sin = (struct sockaddr_in *)newaddr;
3764 if (sin->sin_addr.s_addr == 0) {
3765 /* Invalid address */
3768 /* zero out the zero area */
3769 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3771 /* assure len is set */
3772 sin->sin_len = sizeof(struct sockaddr_in);
3774 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3775 stcb->asoc.scope.ipv4_local_scope = 1;
3778 /* Validate the address is in scope */
3779 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3780 (stcb->asoc.scope.ipv4_local_scope == 0)) {
3790 struct sockaddr_in6 *sin6;
3792 sin6 = (struct sockaddr_in6 *)newaddr;
3793 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3794 /* Invalid address */
3797 /* assure len is set */
3798 sin6->sin6_len = sizeof(struct sockaddr_in6);
3800 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3801 stcb->asoc.scope.loopback_scope = 1;
3802 stcb->asoc.scope.local_scope = 0;
3803 stcb->asoc.scope.ipv4_local_scope = 1;
3804 stcb->asoc.scope.site_scope = 1;
3805 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3807 * If the new destination is a
3808 * LINK_LOCAL we must have common
3809 * site scope. Don't set the local
3810 * scope since we may not share all
3811 * links, only loopback can do this.
3812 * Links on the local network would
3813 * also be on our private network
3816 stcb->asoc.scope.ipv4_local_scope = 1;
3817 stcb->asoc.scope.site_scope = 1;
3818 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3820 * If the new destination is
3821 * SITE_LOCAL then we must have site
3824 stcb->asoc.scope.site_scope = 1;
3827 /* Validate the address is in scope */
3828 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3829 (stcb->asoc.scope.loopback_scope == 0)) {
3831 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3832 (stcb->asoc.scope.local_scope == 0)) {
3834 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3835 (stcb->asoc.scope.site_scope == 0)) {
3843 /* not supported family type */
3846 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3850 SCTP_INCR_RADDR_COUNT();
3851 memset(net, 0, sizeof(struct sctp_nets));
3852 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3853 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3854 switch (newaddr->sa_family) {
3857 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3862 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3868 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3869 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3870 stcb->asoc.scope.loopback_scope = 1;
3871 stcb->asoc.scope.ipv4_local_scope = 1;
3872 stcb->asoc.scope.local_scope = 0;
3873 stcb->asoc.scope.site_scope = 1;
3876 net->failure_threshold = stcb->asoc.def_net_failure;
3877 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3878 if (addr_inscope == 0) {
3879 net->dest_state = (SCTP_ADDR_REACHABLE |
3880 SCTP_ADDR_OUT_OF_SCOPE);
3882 if (from == SCTP_ADDR_IS_CONFIRMED)
3883 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3884 net->dest_state = SCTP_ADDR_REACHABLE;
3886 net->dest_state = SCTP_ADDR_REACHABLE |
3887 SCTP_ADDR_UNCONFIRMED;
3890 * We set this to 0, the timer code knows that this means its an
3893 net->rto_needed = 1;
3895 net->RTO_measured = 0;
3896 stcb->asoc.numnets++;
3898 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3900 net->dscp = stcb->asoc.default_dscp;
3902 net->flowlabel = stcb->asoc.default_flowlabel;
3904 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3905 net->dest_state |= SCTP_ADDR_NOHB;
3907 net->dest_state &= ~SCTP_ADDR_NOHB;
3909 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3910 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3912 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3914 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3915 /* Init the timer structure */
3916 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3917 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3918 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3920 /* Now generate a route for this guy */
3922 /* KAME hack: embed scopeid */
3923 if (newaddr->sa_family == AF_INET6) {
3924 struct sockaddr_in6 *sin6;
3926 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3927 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3928 sin6->sin6_scope_id = 0;
3931 SCTP_RTALLOC((sctp_route_t *)&net->ro,
3933 stcb->sctp_ep->fibnum);
3935 net->src_addr_selected = 0;
3936 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3937 /* Get source address */
3938 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3940 (sctp_route_t *)&net->ro,
3944 if (stcb->asoc.default_mtu > 0) {
3945 net->mtu = stcb->asoc.default_mtu;
3946 switch (net->ro._l_addr.sa.sa_family) {
3949 net->mtu += SCTP_MIN_V4_OVERHEAD;
3954 net->mtu += SCTP_MIN_OVERHEAD;
3960 #if defined(INET) || defined(INET6)
3962 net->mtu += (uint32_t)sizeof(struct udphdr);
3965 } else if (net->ro._s_addr != NULL) {
3966 uint32_t imtu, rmtu, hcmtu;
3968 net->src_addr_selected = 1;
3969 /* Now get the interface MTU */
3970 if (net->ro._s_addr->ifn_p != NULL) {
3972 * XXX: Should we here just use
3973 * net->ro._s_addr->ifn_p->ifn_mtu
3975 imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p,
3976 net->ro._s_addr->ifn_p->ifn_index);
3980 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3981 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3982 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3985 if (net->mtu == 0) {
3986 if (stcb->asoc.default_mtu > 0) {
3987 net->mtu = stcb->asoc.default_mtu;
3988 switch (net->ro._l_addr.sa.sa_family) {
3991 net->mtu += SCTP_MIN_V4_OVERHEAD;
3996 net->mtu += SCTP_MIN_OVERHEAD;
4002 #if defined(INET) || defined(INET6)
4004 net->mtu += (uint32_t)sizeof(struct udphdr);
4008 switch (newaddr->sa_family) {
4011 net->mtu = SCTP_DEFAULT_MTU;
4024 #if defined(INET) || defined(INET6)
4026 net->mtu -= (uint32_t)sizeof(struct udphdr);
4029 if (from == SCTP_ALLOC_ASOC) {
4030 stcb->asoc.smallest_mtu = net->mtu;
4032 if (stcb->asoc.smallest_mtu > net->mtu) {
4033 sctp_pathmtu_adjustment(stcb, net->mtu, true);
4036 if (newaddr->sa_family == AF_INET6) {
4037 struct sockaddr_in6 *sin6;
4039 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4040 (void)sa6_recoverscope(sin6);
4044 /* JRS - Use the congestion control given in the CC module */
4045 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4046 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4049 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4050 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4052 net->find_pseudo_cumack = 1;
4053 net->find_rtx_pseudo_cumack = 1;
4054 /* Choose an initial flowid. */
4055 net->flowid = stcb->asoc.my_vtag ^
4056 ntohs(stcb->rport) ^
4057 ntohs(stcb->sctp_ep->sctp_lport);
4058 net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4062 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4063 if (net->ro.ro_nh == NULL) {
4064 /* Since we have no route put it at the back */
4065 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4066 } else if (netfirst == NULL) {
4067 /* We are the first one in the pool. */
4068 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4069 } else if (netfirst->ro.ro_nh == NULL) {
4071 * First one has NO route. Place this one ahead of the first
4074 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4075 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4077 * This one has a different interface than the one at the
4078 * top of the list. Place it ahead.
4080 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4083 * Ok we have the same interface as the first one. Move
4084 * forward until we find either a) one with a NULL route...
4085 * insert ahead of that b) one with a different ifp.. insert
4086 * after that. c) end of the list.. insert at the tail.
4088 struct sctp_nets *netlook;
4091 netlook = TAILQ_NEXT(netfirst, sctp_next);
4092 if (netlook == NULL) {
4093 /* End of the list */
4094 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4096 } else if (netlook->ro.ro_nh == NULL) {
4097 /* next one has NO route */
4098 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4100 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4101 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4107 } while (netlook != NULL);
4110 /* got to have a primary set */
4111 if (stcb->asoc.primary_destination == 0) {
4112 stcb->asoc.primary_destination = net;
4113 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4115 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4116 /* No route to current primary adopt new primary */
4117 stcb->asoc.primary_destination = net;
4119 /* Validate primary is first */
4120 net = TAILQ_FIRST(&stcb->asoc.nets);
4121 if ((net != stcb->asoc.primary_destination) &&
4122 (stcb->asoc.primary_destination)) {
4124 * first one on the list is NOT the primary sctp_cmpaddr()
4125 * is much more efficient if the primary is the first on the
4128 TAILQ_REMOVE(&stcb->asoc.nets,
4129 stcb->asoc.primary_destination, sctp_next);
4130 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4131 stcb->asoc.primary_destination, sctp_next);
4137 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4140 struct sctpasochead *head;
4141 struct sctp_tcb *lstcb;
4144 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4149 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4150 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4152 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4153 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4155 id = inp->sctp_associd_counter;
4156 inp->sctp_associd_counter++;
4157 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4161 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4162 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4163 stcb->asoc.in_asocid_hash = 1;
4168 * allocate an association and add it to the endpoint. The caller must be
4169 * careful to add all additional addresses once they are know right away or
4170 * else the assoc will be may experience a blackout scenario.
4172 static struct sctp_tcb *
4173 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4174 int *error, uint32_t override_tag, uint32_t initial_tsn,
4175 uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4177 int initialize_auth_params)
4179 /* note the p argument is only valid in unbound sockets */
4181 struct sctp_tcb *stcb;
4182 struct sctp_association *asoc;
4183 struct sctpasochead *head;
4187 SCTP_INP_INFO_WLOCK_ASSERT();
4188 SCTP_INP_WLOCK_ASSERT(inp);
4191 * Assumption made here: Caller has done a
4192 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4193 * address does not exist already.
4195 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4196 /* Hit max assoc, sorry no more */
4197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4201 if (firstaddr == NULL) {
4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4206 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4211 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4212 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4213 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4215 * If its in the TCP pool, its NOT allowed to create an
4216 * association. The parent listener needs to call
4217 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4218 * off, or connected one does this.. its an error.
4220 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4225 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4226 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4227 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4228 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4233 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4236 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4237 switch (firstaddr->sa_family) {
4240 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4241 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4246 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4247 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4254 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4256 #endif /* SCTP_DEBUG */
4257 switch (firstaddr->sa_family) {
4261 struct sockaddr_in *sin;
4263 sin = (struct sockaddr_in *)firstaddr;
4264 if ((ntohs(sin->sin_port) == 0) ||
4265 (sin->sin_addr.s_addr == INADDR_ANY) ||
4266 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4267 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4268 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
4269 (SCTP_IPV6_V6ONLY(inp) != 0))) {
4270 /* Invalid address */
4271 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4275 rport = sin->sin_port;
4282 struct sockaddr_in6 *sin6;
4284 sin6 = (struct sockaddr_in6 *)firstaddr;
4285 if ((ntohs(sin6->sin6_port) == 0) ||
4286 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4287 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4288 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4289 /* Invalid address */
4290 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4294 rport = sin6->sin6_port;
4299 /* not supported family type */
4300 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4304 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4306 * If you have not performed a bind, then we need to do the
4307 * ephemeral bind for you.
4309 if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) {
4310 /* bind error, probably perm */
4315 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4317 /* out of memory? */
4318 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4322 SCTP_INCR_ASOC_COUNT();
4324 memset(stcb, 0, sizeof(*stcb));
4327 SCTP_TCB_LOCK_INIT(stcb);
4328 stcb->rport = rport;
4329 /* setup back pointer's */
4330 stcb->sctp_ep = inp;
4331 stcb->sctp_socket = inp->sctp_socket;
4332 if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) {
4334 SCTP_TCB_LOCK_DESTROY(stcb);
4335 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4336 SCTP_DECR_ASOC_COUNT();
4340 SCTP_TCB_LOCK(stcb);
4342 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4343 /* now that my_vtag is set, add it to the hash */
4344 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4345 /* put it in the bucket in the vtag hash of assoc's for the system */
4346 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4348 if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4349 /* failure.. memory error? */
4350 if (asoc->strmout) {
4351 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4352 asoc->strmout = NULL;
4354 if (asoc->mapping_array) {
4355 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4356 asoc->mapping_array = NULL;
4358 if (asoc->nr_mapping_array) {
4359 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4360 asoc->nr_mapping_array = NULL;
4362 SCTP_DECR_ASOC_COUNT();
4363 SCTP_TCB_UNLOCK(stcb);
4364 SCTP_TCB_LOCK_DESTROY(stcb);
4365 LIST_REMOVE(stcb, sctp_asocs);
4366 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4367 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4368 SCTP_INP_WUNLOCK(inp);
4369 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4373 /* Init all the timers */
4374 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4375 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4376 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4377 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4378 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4379 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4381 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4382 /* now file the port under the hash as well */
4383 if (inp->sctp_tcbhash != NULL) {
4384 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4385 inp->sctp_hashmark)];
4386 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4388 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4389 sctp_initialize_auth_params(inp, stcb);
4391 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4396 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4397 int *error, uint32_t override_tag, uint32_t initial_tsn,
4398 uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4400 int initialize_auth_params)
4402 struct sctp_tcb *stcb;
4404 SCTP_INP_INFO_WLOCK();
4405 SCTP_INP_WLOCK(inp);
4406 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4407 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4408 SCTP_INP_INFO_WUNLOCK();
4409 SCTP_INP_WUNLOCK(inp);
4414 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4415 int *error, uint32_t override_tag, uint32_t initial_tsn,
4416 uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4418 int initialize_auth_params)
4420 struct sctp_tcb *stcb;
4422 SCTP_INP_INFO_WLOCK();
4423 SCTP_INP_WLOCK(inp);
4424 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4425 SCTP_IS_LISTENING(inp)) {
4426 SCTP_INP_INFO_WUNLOCK();
4427 SCTP_INP_WUNLOCK(inp);
4431 stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4432 initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4433 SCTP_INP_INFO_WUNLOCK();
4434 if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4435 inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
4436 soisconnecting(inp->sctp_socket);
4438 SCTP_INP_WUNLOCK(inp);
4443 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4445 struct sctp_inpcb *inp;
4446 struct sctp_association *asoc;
4448 inp = stcb->sctp_ep;
4451 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4452 if (net == asoc->primary_destination) {
4454 struct sctp_nets *lnet;
4456 lnet = TAILQ_FIRST(&asoc->nets);
4458 * Mobility adaptation Ideally, if deleted destination is
4459 * the primary, it becomes a fast retransmission trigger by
4460 * the subsequent SET PRIMARY. (by micchie)
4462 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4463 SCTP_MOBILITY_BASE) ||
4464 sctp_is_mobility_feature_on(stcb->sctp_ep,
4465 SCTP_MOBILITY_FASTHANDOFF)) {
4466 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4467 if (asoc->deleted_primary != NULL) {
4468 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4471 asoc->deleted_primary = net;
4472 atomic_add_int(&net->ref_count, 1);
4473 memset(&net->lastsa, 0, sizeof(net->lastsa));
4474 memset(&net->lastsv, 0, sizeof(net->lastsv));
4475 sctp_mobility_feature_on(stcb->sctp_ep,
4476 SCTP_MOBILITY_PRIM_DELETED);
4477 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4478 stcb->sctp_ep, stcb, NULL);
4481 /* Try to find a confirmed primary */
4482 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4484 if (net == asoc->last_data_chunk_from) {
4486 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4488 if (net == asoc->last_control_chunk_from) {
4490 asoc->last_control_chunk_from = NULL;
4492 if (net == asoc->last_net_cmt_send_started) {
4494 asoc->last_net_cmt_send_started = NULL;
4496 if (net == stcb->asoc.alternate) {
4497 sctp_free_remote_addr(stcb->asoc.alternate);
4498 stcb->asoc.alternate = NULL;
4500 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4501 SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4502 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4503 SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4504 net->dest_state |= SCTP_ADDR_BEING_DELETED;
4505 sctp_free_remote_addr(net);
4509 * remove a remote endpoint address from an association, it will fail if the
4510 * address does not exist.
4513 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4516 * Here we need to remove a remote address. This is quite simple, we
4517 * first find it in the list of address for the association
4518 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4519 * on that item. Note we do not allow it to be removed if there are
4520 * no other addresses.
4522 struct sctp_association *asoc;
4523 struct sctp_nets *net, *nnet;
4527 /* locate the address */
4528 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4529 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4532 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4534 /* we found the guy */
4535 if (asoc->numnets < 2) {
4536 /* Must have at LEAST two remote addresses */
4539 sctp_remove_net(stcb, net);
4549 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now)
4551 struct sctpvtaghead *chain;
4552 struct sctp_tagblock *twait_block;
4555 SCTP_INP_INFO_LOCK_ASSERT();
4556 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4557 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4558 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4559 if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) &&
4560 (twait_block->vtag_block[i].v_tag == tag) &&
4561 (twait_block->vtag_block[i].lport == lport) &&
4562 (twait_block->vtag_block[i].rport == rport)) {
4571 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time,
4572 uint32_t tag, uint16_t lport, uint16_t rport)
4574 vtag_block->tv_sec_at_expire = time;
4575 vtag_block->v_tag = tag;
4576 vtag_block->lport = lport;
4577 vtag_block->rport = rport;
4581 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4583 struct sctpvtaghead *chain;
4584 struct sctp_tagblock *twait_block;
4590 SCTP_INP_INFO_WLOCK_ASSERT();
4591 (void)SCTP_GETTIME_TIMEVAL(&now);
4592 time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait);
4593 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4595 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4596 /* Block(s) present, lets find space, and expire on the fly */
4597 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4598 if ((twait_block->vtag_block[i].v_tag == 0) && !set) {
4599 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4603 if ((twait_block->vtag_block[i].v_tag != 0) &&
4604 (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) {
4606 /* Audit expires this guy */
4607 sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0);
4609 /* Reuse it for the new tag */
4610 sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4617 * We only do up to the block where we can place our
4623 /* Need to add a new block to chain */
4625 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4626 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4627 if (twait_block == NULL) {
4630 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4631 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4632 sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport);
4637 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4639 struct sctp_tmit_chunk *chk, *nchk;
4640 struct sctp_queued_to_read *control, *ncontrol;
4642 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4643 TAILQ_REMOVE(rh, control, next_instrm);
4644 control->on_strm_q = 0;
4645 if (control->on_read_q == 0) {
4646 sctp_free_remote_addr(control->whoFrom);
4647 if (control->data) {
4648 sctp_m_freem(control->data);
4649 control->data = NULL;
4652 /* Reassembly free? */
4653 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4654 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4656 sctp_m_freem(chk->data);
4659 if (chk->holds_key_ref)
4660 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4661 sctp_free_remote_addr(chk->whoTo);
4662 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4663 SCTP_DECR_CHK_COUNT();
4664 /* sa_ignore FREED_MEMORY */
4667 * We don't free the address here since all the net's were
4670 if (control->on_read_q == 0) {
4671 sctp_free_a_readq(stcb, control);
4677 * Free the association after un-hashing the remote port. This
4678 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4679 * expect that the input to this function IS a locked TCB.
4680 * It will return 0, if it did NOT destroy the association (instead
4681 * it unlocks it. It will return NON-zero if it either destroyed the
4682 * association OR the association is already destroyed.
4685 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4688 struct sctp_association *asoc;
4689 struct sctp_nets *net, *nnet;
4690 struct sctp_laddr *laddr, *naddr;
4691 struct sctp_tmit_chunk *chk, *nchk;
4692 struct sctp_asconf_addr *aparam, *naparam;
4693 struct sctp_asconf_ack *aack, *naack;
4694 struct sctp_stream_reset_list *strrst, *nstrrst;
4695 struct sctp_queued_to_read *sq, *nsq;
4696 struct sctp_stream_queue_pending *sp, *nsp;
4697 sctp_sharedkey_t *shared_key, *nshared_key;
4700 /* first, lets purge the entry from the hash table. */
4701 SCTP_TCB_LOCK_ASSERT(stcb);
4703 #ifdef SCTP_LOG_CLOSING
4704 sctp_log_closing(inp, stcb, 6);
4706 if (stcb->asoc.state == 0) {
4707 #ifdef SCTP_LOG_CLOSING
4708 sctp_log_closing(inp, NULL, 7);
4710 /* there is no asoc, really TSNH :-0 */
4713 if (stcb->asoc.alternate) {
4714 sctp_free_remote_addr(stcb->asoc.alternate);
4715 stcb->asoc.alternate = NULL;
4718 if (stcb->freed_from_where == 0) {
4719 /* Only record the first place free happened from */
4720 stcb->freed_from_where = from_location;
4725 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4726 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4727 /* nothing around */
4730 so = inp->sctp_socket;
4733 * We used timer based freeing if a reader or writer is in the way.
4734 * So we first check if we are actually being called from a timer,
4735 * if so we abort early if a reader or writer is still in the way.
4737 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4738 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4740 * is it the timer driving us? if so are the reader/writers
4743 if (stcb->asoc.refcnt) {
4744 /* nope, reader or writer in the way */
4745 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4746 /* no asoc destroyed */
4747 SCTP_TCB_UNLOCK(stcb);
4748 #ifdef SCTP_LOG_CLOSING
4749 sctp_log_closing(inp, stcb, 8);
4754 /* Now clean up any other timers */
4755 sctp_stop_association_timers(stcb, false);
4756 /* Now the read queue needs to be cleaned up (only once) */
4757 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4758 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4759 SCTP_INP_READ_LOCK(inp);
4760 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4761 if (sq->stcb == stcb) {
4762 sq->do_not_ref_stcb = 1;
4763 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4765 * If there is no end, there never will be
4768 if (sq->end_added == 0) {
4769 /* Held for PD-API clear that. */
4770 sq->pdapi_aborted = 1;
4771 sq->held_length = 0;
4772 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4774 * Need to add a PD-API
4775 * aborted indication.
4776 * Setting the control_pdapi
4777 * assures that it will be
4778 * added right after this
4783 stcb->asoc.control_pdapi = sq;
4784 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4785 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4787 SCTP_PARTIAL_DELIVERY_ABORTED,
4790 stcb->asoc.control_pdapi = NULL;
4793 /* Add an end to wake them */
4797 SCTP_INP_READ_UNLOCK(inp);
4798 if (stcb->block_entry) {
4799 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4800 stcb->block_entry->error = ECONNRESET;
4801 stcb->block_entry = NULL;
4804 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4806 * Someone holds a reference OR the socket is unaccepted
4809 if ((stcb->asoc.refcnt) ||
4810 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4811 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4812 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4813 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4815 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4816 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4817 /* nothing around */
4820 /* Wake any reader/writers */
4821 sctp_sorwakeup(inp, so);
4822 sctp_sowwakeup(inp, so);
4824 SCTP_TCB_UNLOCK(stcb);
4826 #ifdef SCTP_LOG_CLOSING
4827 sctp_log_closing(inp, stcb, 9);
4829 /* no asoc destroyed */
4832 #ifdef SCTP_LOG_CLOSING
4833 sctp_log_closing(inp, stcb, 10);
4836 * When I reach here, no others want to kill the assoc yet.. and I
4837 * own the lock. Now its possible an abort comes in when I do the
4838 * lock exchange below to grab all the locks to do the final take
4839 * out. to prevent this we increment the count, which will start a
4840 * timer and blow out above thus assuring us that we hold exclusive
4841 * killing of the asoc. Note that after getting back the TCB lock we
4842 * will go ahead and increment the counter back up and stop any
4843 * timer a passing stranger may have started :-S
4845 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4846 atomic_add_int(&stcb->asoc.refcnt, 1);
4848 SCTP_TCB_UNLOCK(stcb);
4849 SCTP_INP_INFO_WLOCK();
4850 SCTP_INP_WLOCK(inp);
4851 SCTP_TCB_LOCK(stcb);
4853 /* Double check the GONE flag */
4854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4855 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4856 /* nothing around */
4859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4860 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4862 * For TCP type we need special handling when we are
4863 * connected. We also include the peel'ed off ones to.
4865 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4866 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4867 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4869 SOCKBUF_LOCK(&so->so_rcv);
4870 so->so_state &= ~(SS_ISCONNECTING |
4871 SS_ISDISCONNECTING |
4874 so->so_state |= SS_ISDISCONNECTED;
4875 socantrcvmore_locked(so);
4877 sctp_sowwakeup(inp, so);
4878 sctp_sorwakeup(inp, so);
4885 * Make it invalid too, that way if its about to run it will abort
4888 /* re-increment the lock */
4889 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4890 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4892 if (stcb->asoc.refcnt) {
4893 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4894 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4895 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4896 SCTP_INP_INFO_WUNLOCK();
4897 SCTP_INP_WUNLOCK(inp);
4899 SCTP_TCB_UNLOCK(stcb);
4903 if (inp->sctp_tcbhash) {
4904 LIST_REMOVE(stcb, sctp_tcbhash);
4906 if (stcb->asoc.in_asocid_hash) {
4907 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4909 if (inp->sctp_socket == NULL) {
4910 stcb->sctp_socket = NULL;
4912 /* Now lets remove it from the list of ALL associations in the EP */
4913 LIST_REMOVE(stcb, sctp_tcblist);
4914 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4915 SCTP_INP_INCR_REF(inp);
4916 SCTP_INP_WUNLOCK(inp);
4918 /* pull from vtag hash */
4919 LIST_REMOVE(stcb, sctp_asocs);
4920 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport);
4923 * Now restop the timers to be sure this is paranoia at is finest!
4925 sctp_stop_association_timers(stcb, true);
4928 * The chunk lists and such SHOULD be empty but we check them just
4931 /* anything on the wheel needs to be removed */
4932 for (i = 0; i < asoc->streamoutcnt; i++) {
4933 struct sctp_stream_out *outs;
4935 outs = &asoc->strmout[i];
4936 /* now clean up any chunks here */
4937 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4938 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4939 TAILQ_REMOVE(&outs->outqueue, sp, next);
4940 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
4941 sctp_free_spbufspace(stcb, asoc, sp);
4944 /* Still an open socket - report */
4945 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4946 0, (void *)sp, SCTP_SO_LOCKED);
4949 sctp_m_freem(sp->data);
4951 sp->tail_mbuf = NULL;
4956 sctp_free_remote_addr(sp->net);
4959 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4962 /* sa_ignore FREED_MEMORY */
4963 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4964 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4965 SCTP_FREE(strrst, SCTP_M_STRESET);
4967 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4968 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4970 sctp_m_freem(sq->data);
4973 sctp_free_remote_addr(sq->whoFrom);
4976 /* Free the ctl entry */
4977 sctp_free_a_readq(stcb, sq);
4978 /* sa_ignore FREED_MEMORY */
4980 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4981 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4983 sctp_m_freem(chk->data);
4986 if (chk->holds_key_ref)
4987 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4988 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4989 SCTP_DECR_CHK_COUNT();
4990 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4991 asoc->free_chunk_cnt--;
4992 /* sa_ignore FREED_MEMORY */
4994 /* pending send queue SHOULD be empty */
4995 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4996 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4997 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5000 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5003 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5006 /* Still a socket? */
5007 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5008 0, chk, SCTP_SO_LOCKED);
5011 sctp_m_freem(chk->data);
5015 if (chk->holds_key_ref)
5016 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5018 sctp_free_remote_addr(chk->whoTo);
5021 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5022 SCTP_DECR_CHK_COUNT();
5023 /* sa_ignore FREED_MEMORY */
5025 /* sent queue SHOULD be empty */
5026 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5027 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5028 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5029 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5032 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5036 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5039 /* Still a socket? */
5040 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5041 0, chk, SCTP_SO_LOCKED);
5044 sctp_m_freem(chk->data);
5048 if (chk->holds_key_ref)
5049 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5050 sctp_free_remote_addr(chk->whoTo);
5051 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5052 SCTP_DECR_CHK_COUNT();
5053 /* sa_ignore FREED_MEMORY */
5056 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5057 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5058 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5062 /* control queue MAY not be empty */
5063 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5064 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5066 sctp_m_freem(chk->data);
5069 if (chk->holds_key_ref)
5070 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5071 sctp_free_remote_addr(chk->whoTo);
5072 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5073 SCTP_DECR_CHK_COUNT();
5074 /* sa_ignore FREED_MEMORY */
5076 /* ASCONF queue MAY not be empty */
5077 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5078 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5080 sctp_m_freem(chk->data);
5083 if (chk->holds_key_ref)
5084 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5085 sctp_free_remote_addr(chk->whoTo);
5086 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5087 SCTP_DECR_CHK_COUNT();
5088 /* sa_ignore FREED_MEMORY */
5090 if (asoc->mapping_array) {
5091 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5092 asoc->mapping_array = NULL;
5094 if (asoc->nr_mapping_array) {
5095 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5096 asoc->nr_mapping_array = NULL;
5098 /* the stream outs */
5099 if (asoc->strmout) {
5100 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5101 asoc->strmout = NULL;
5103 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5105 for (i = 0; i < asoc->streamincnt; i++) {
5106 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5107 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5109 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5110 asoc->strmin = NULL;
5112 asoc->streamincnt = 0;
5113 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5115 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5116 panic("no net's left alloc'ed, or list points to itself");
5119 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5120 sctp_free_remote_addr(net);
5122 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5123 /* sa_ignore FREED_MEMORY */
5124 sctp_remove_laddr(laddr);
5127 /* pending asconf (address) parameters */
5128 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5129 /* sa_ignore FREED_MEMORY */
5130 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5131 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5133 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5134 /* sa_ignore FREED_MEMORY */
5135 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5136 if (aack->data != NULL) {
5137 sctp_m_freem(aack->data);
5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5141 /* clean up auth stuff */
5142 if (asoc->local_hmacs)
5143 sctp_free_hmaclist(asoc->local_hmacs);
5144 if (asoc->peer_hmacs)
5145 sctp_free_hmaclist(asoc->peer_hmacs);
5147 if (asoc->local_auth_chunks)
5148 sctp_free_chunklist(asoc->local_auth_chunks);
5149 if (asoc->peer_auth_chunks)
5150 sctp_free_chunklist(asoc->peer_auth_chunks);
5152 sctp_free_authinfo(&asoc->authinfo);
5154 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5155 LIST_REMOVE(shared_key, next);
5156 sctp_free_sharedkey(shared_key);
5157 /* sa_ignore FREED_MEMORY */
5160 /* Insert new items here :> */
5162 /* Get rid of LOCK */
5163 SCTP_TCB_UNLOCK(stcb);
5164 SCTP_TCB_LOCK_DESTROY(stcb);
5165 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5166 SCTP_INP_INFO_WUNLOCK();
5167 SCTP_INP_RLOCK(inp);
5169 #ifdef SCTP_TRACK_FREED_ASOCS
5170 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5171 /* now clean up the tasoc itself */
5172 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5173 SCTP_DECR_ASOC_COUNT();
5175 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5178 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5179 SCTP_DECR_ASOC_COUNT();
5181 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5182 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5184 * If its NOT the inp_free calling us AND sctp_close
5185 * as been called, we call back...
5187 SCTP_INP_RUNLOCK(inp);
5189 * This will start the kill timer (if we are the
5190 * last one) since we hold an increment yet. But
5191 * this is the only safe way to do this since
5192 * otherwise if the socket closes at the same time
5193 * we are here we might collide in the cleanup.
5195 sctp_inpcb_free(inp,
5196 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5197 SCTP_CALLED_DIRECTLY_NOCMPSET);
5198 SCTP_INP_DECR_REF(inp);
5200 /* The socket is still open. */
5201 SCTP_INP_DECR_REF(inp);
5202 SCTP_INP_RUNLOCK(inp);
5205 /* destroyed the asoc */
5206 #ifdef SCTP_LOG_CLOSING
5207 sctp_log_closing(inp, NULL, 11);
5213 * determine if a destination is "reachable" based upon the addresses bound
5214 * to the current endpoint (e.g. only v4 or v6 currently bound)
5217 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5218 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5219 * types bound as its endpoint
5222 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5224 struct sctp_inpcb *inp;
5228 * No locks here, the TCB, in all cases is already locked and an
5229 * assoc is up. There is either a INP lock by the caller applied (in
5230 * asconf case when deleting an address) or NOT in the HB case,
5231 * however if HB then the INP increment is up and the INP will not
5232 * be removed (on top of the fact that we have a TCB lock). So we
5233 * only want to read the sctp_flags, which is either bound-all or
5234 * not.. no protection needed since once an assoc is up you can't be
5235 * changing your binding.
5237 inp = stcb->sctp_ep;
5238 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5239 /* if bound all, destination is not restricted */
5241 * RRS: Question during lock work: Is this correct? If you
5242 * are bound-all you still might need to obey the V4--V6
5243 * flags??? IMO this bound-all stuff needs to be removed!
5247 /* NOTE: all "scope" checks are done when local addresses are added */
5248 switch (destaddr->sa_family) {
5251 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5256 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5260 /* invalid family, so it's unreachable */
5268 * update the inp_vflags on an endpoint
5271 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5273 struct sctp_laddr *laddr;
5275 /* first clear the flag */
5276 inp->ip_inp.inp.inp_vflag = 0;
5277 /* set the flag based on addresses on the ep list */
5278 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5279 if (laddr->ifa == NULL) {
5280 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5285 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5288 switch (laddr->ifa->address.sa.sa_family) {
5291 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5296 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5306 * Add the address to the endpoint local address list There is nothing to be
5307 * done if we are bound to all addresses
5310 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5312 struct sctp_laddr *laddr;
5313 struct sctp_tcb *stcb;
5318 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5319 /* You are already bound to all. You have it already */
5323 if (ifa->address.sa.sa_family == AF_INET6) {
5324 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5325 /* Can't bind a non-useable addr. */
5330 /* first, is it already present? */
5331 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5332 if (laddr->ifa == ifa) {
5339 /* Not in the ep list */
5340 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5344 /* update inp_vflag flags */
5345 switch (ifa->address.sa.sa_family) {
5348 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5353 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5359 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5360 sctp_add_local_addr_restricted(stcb, ifa);
5367 * select a new (hopefully reachable) destination net (should only be used
5368 * when we deleted an ep addr that is the only usable source address to reach
5369 * the destination net)
5372 sctp_select_primary_destination(struct sctp_tcb *stcb)
5374 struct sctp_nets *net;
5376 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5377 /* for now, we'll just pick the first reachable one we find */
5378 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5380 if (sctp_destination_is_reachable(stcb,
5381 (struct sockaddr *)&net->ro._l_addr)) {
5382 /* found a reachable destination */
5383 stcb->asoc.primary_destination = net;
5386 /* I can't there from here! ...we're gonna die shortly... */
5390 * Delete the address from the endpoint local address list. There is nothing
5391 * to be done if we are bound to all addresses
5394 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5396 struct sctp_laddr *laddr;
5400 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5401 /* You are already bound to all. You have it already */
5404 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5405 if (laddr->ifa == ifa) {
5410 if (fnd && (inp->laddr_count < 2)) {
5411 /* can't delete unless there are at LEAST 2 addresses */
5416 * clean up any use of this address go through our
5417 * associations and clear any last_used_address that match
5418 * this one for each assoc, see if a new primary_destination
5421 struct sctp_tcb *stcb;
5423 /* clean up "next_addr_touse" */
5424 if (inp->next_addr_touse == laddr)
5425 /* delete this address */
5426 inp->next_addr_touse = NULL;
5428 /* clean up "last_used_address" */
5429 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5430 struct sctp_nets *net;
5432 SCTP_TCB_LOCK(stcb);
5433 if (stcb->asoc.last_used_address == laddr)
5434 /* delete this address */
5435 stcb->asoc.last_used_address = NULL;
5437 * Now spin through all the nets and purge any ref
5440 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5441 if (net->ro._s_addr == laddr->ifa) {
5442 /* Yep, purge src address selected */
5443 RO_NHFREE(&net->ro);
5444 sctp_free_ifa(net->ro._s_addr);
5445 net->ro._s_addr = NULL;
5446 net->src_addr_selected = 0;
5449 SCTP_TCB_UNLOCK(stcb);
5450 } /* for each tcb */
5451 /* remove it from the ep list */
5452 sctp_remove_laddr(laddr);
5454 /* update inp_vflag flags */
5455 sctp_update_ep_vflag(inp);
5461 * Add the address to the TCB local address restricted list.
5462 * This is a "pending" address list (eg. addresses waiting for an
5463 * ASCONF-ACK response) and cannot be used as a valid source address.
5466 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5468 struct sctp_laddr *laddr;
5469 struct sctpladdr *list;
5472 * Assumes TCB is locked.. and possibly the INP. May need to
5473 * confirm/fix that if we need it and is not the case.
5475 list = &stcb->asoc.sctp_restricted_addrs;
5478 if (ifa->address.sa.sa_family == AF_INET6) {
5479 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5480 /* Can't bind a non-existent addr. */
5485 /* does the address already exist? */
5486 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5487 if (laddr->ifa == ifa) {
5492 /* add to the list */
5493 (void)sctp_insert_laddr(list, ifa, 0);
5498 * Remove a local address from the TCB local address restricted list
5501 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5503 struct sctp_inpcb *inp;
5504 struct sctp_laddr *laddr;
5507 * This is called by asconf work. It is assumed that a) The TCB is
5508 * locked and b) The INP is locked. This is true in as much as I can
5509 * trace through the entry asconf code where I did these locks.
5510 * Again, the ASCONF code is a bit different in that it does lock
5511 * the INP during its work often times. This must be since we don't
5512 * want other proc's looking up things while what they are looking
5513 * up is changing :-D
5516 inp = stcb->sctp_ep;
5517 /* if subset bound and don't allow ASCONF's, can't delete last */
5518 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5519 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5520 if (stcb->sctp_ep->laddr_count < 2) {
5521 /* can't delete last address */
5525 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5526 /* remove the address if it exists */
5527 if (laddr->ifa == NULL)
5529 if (laddr->ifa == ifa) {
5530 sctp_remove_laddr(laddr);
5535 /* address not found! */
5540 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5541 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5543 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5544 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5545 int *sctp_cpuarry = NULL;
5548 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5550 /* Queue a packet to a processor for the specified core */
5551 struct sctp_mcore_queue *qent;
5552 struct sctp_mcore_ctrl *wkq;
5555 if (sctp_mcore_workers == NULL) {
5556 /* Something went way bad during setup */
5557 sctp_input_with_port(m, off, 0);
5560 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5561 (sizeof(struct sctp_mcore_queue)),
5564 /* This is trouble */
5565 sctp_input_with_port(m, off, 0);
5572 wkq = &sctp_mcore_workers[cpu_to_use];
5573 SCTP_MCORE_QLOCK(wkq);
5575 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5576 if (wkq->running == 0) {
5579 SCTP_MCORE_QUNLOCK(wkq);
5581 wakeup(&wkq->running);
5586 sctp_mcore_thread(void *arg)
5589 struct sctp_mcore_ctrl *wkq;
5590 struct sctp_mcore_queue *qent;
5592 wkq = (struct sctp_mcore_ctrl *)arg;
5596 /* Wait for first tickle */
5597 SCTP_MCORE_LOCK(wkq);
5599 msleep(&wkq->running,
5601 0, "wait for pkt", 0);
5602 SCTP_MCORE_UNLOCK(wkq);
5604 /* Bind to our cpu */
5605 thread_lock(curthread);
5606 sched_bind(curthread, wkq->cpuid);
5607 thread_unlock(curthread);
5609 /* Now lets start working */
5610 SCTP_MCORE_LOCK(wkq);
5611 /* Now grab lock and go */
5613 SCTP_MCORE_QLOCK(wkq);
5616 qent = TAILQ_FIRST(&wkq->que);
5618 TAILQ_REMOVE(&wkq->que, qent, next);
5619 SCTP_MCORE_QUNLOCK(wkq);
5620 CURVNET_SET(qent->vn);
5624 SCTP_FREE(qent, SCTP_M_MCORE);
5626 sctp_input_with_port(m, off, 0);
5628 SCTP_PRINTF("V6 not yet supported\n");
5632 SCTP_MCORE_QLOCK(wkq);
5635 if (!TAILQ_EMPTY(&wkq->que)) {
5638 SCTP_MCORE_QUNLOCK(wkq);
5639 msleep(&wkq->running,
5641 0, "wait for pkt", 0);
5646 sctp_startup_mcore_threads(void)
5653 if (sctp_mcore_workers != NULL) {
5655 * Already been here in some previous vnet?
5659 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5660 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5662 if (sctp_mcore_workers == NULL) {
5666 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5667 sizeof(struct sctp_mcore_ctrl)));
5668 /* Init the structures */
5669 for (i = 0; i <= mp_maxid; i++) {
5670 TAILQ_INIT(&sctp_mcore_workers[i].que);
5671 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5672 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5673 sctp_mcore_workers[i].cpuid = i;
5675 if (sctp_cpuarry == NULL) {
5676 SCTP_MALLOC(sctp_cpuarry, int *,
5677 (mp_ncpus * sizeof(int)),
5681 sctp_cpuarry[i] = cpu;
5685 /* Now start them all */
5687 (void)kproc_create(sctp_mcore_thread,
5688 (void *)&sctp_mcore_workers[cpu],
5689 &sctp_mcore_workers[cpu].thread_proc,
5701 * SCTP initialization for the PCB structures should be called by
5702 * the sctp_init() function.
5707 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5708 /* error I was called twice */
5711 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5713 #if defined(SCTP_LOCAL_TRACE_BUF)
5714 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5716 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5717 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5718 ((mp_maxid + 1) * sizeof(struct sctpstat)),
5721 (void)SCTP_GETTIME_TIMEVAL(&tv);
5722 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5723 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5724 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5725 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5727 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5728 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5729 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5731 /* init the empty list of (All) Endpoints */
5732 LIST_INIT(&SCTP_BASE_INFO(listhead));
5734 /* init the hash table of endpoints */
5735 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5736 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5737 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5738 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5739 &SCTP_BASE_INFO(hashasocmark));
5740 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5741 &SCTP_BASE_INFO(hashmark));
5742 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5743 &SCTP_BASE_INFO(hashtcpmark));
5744 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5745 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5746 &SCTP_BASE_INFO(hashvrfmark));
5748 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5749 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5750 /* init the zones */
5752 * FIX ME: Should check for NULL returns, but if it does fail we are
5753 * doomed to panic anyways... add later maybe.
5755 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5756 sizeof(struct sctp_inpcb), maxsockets);
5758 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5759 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5761 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5762 sizeof(struct sctp_laddr),
5763 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5765 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5766 sizeof(struct sctp_nets),
5767 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5769 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5770 sizeof(struct sctp_tmit_chunk),
5771 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5773 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5774 sizeof(struct sctp_queued_to_read),
5775 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5777 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5778 sizeof(struct sctp_stream_queue_pending),
5779 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5781 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5782 sizeof(struct sctp_asconf),
5783 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5785 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5786 sizeof(struct sctp_asconf_ack),
5787 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5789 /* Master Lock INIT for info structure */
5790 SCTP_INP_INFO_LOCK_INIT();
5791 SCTP_STATLOG_INIT_LOCK();
5793 SCTP_IPI_COUNT_INIT();
5794 SCTP_IPI_ADDR_INIT();
5795 #ifdef SCTP_PACKET_LOGGING
5796 SCTP_IP_PKTLOG_INIT();
5798 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5800 SCTP_WQ_ADDR_INIT();
5801 /* not sure if we need all the counts */
5802 SCTP_BASE_INFO(ipi_count_ep) = 0;
5803 /* assoc/tcb zone info */
5804 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5805 /* local addrlist zone info */
5806 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5807 /* remote addrlist zone info */
5808 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5810 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5812 /* socket queue zone info */
5813 SCTP_BASE_INFO(ipi_count_readq) = 0;
5815 /* stream out queue cont */
5816 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5818 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5819 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5821 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5823 /* Init the TIMEWAIT list */
5824 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5825 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5827 sctp_startup_iterator();
5829 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5830 sctp_startup_mcore_threads();
5834 * INIT the default VRF which for BSD is the only one, other O/S's
5835 * may have more. But initially they must start with one and then
5836 * add the VRF's as addresses are added.
5838 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5842 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5845 sctp_pcb_finish(void)
5847 struct sctp_vrflist *vrf_bucket;
5848 struct sctp_vrf *vrf, *nvrf;
5849 struct sctp_ifn *ifn, *nifn;
5850 struct sctp_ifa *ifa, *nifa;
5851 struct sctpvtaghead *chain;
5852 struct sctp_tagblock *twait_block, *prev_twait_block;
5853 struct sctp_laddr *wi, *nwi;
5855 struct sctp_iterator *it, *nit;
5857 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5858 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5861 SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5863 * In FreeBSD the iterator thread never exits but we do clean up.
5864 * The only way FreeBSD reaches here is if we have VRF's but we
5865 * still add the ifdef to make it compile on old versions.
5868 SCTP_IPI_ITERATOR_WQ_LOCK();
5870 * sctp_iterator_worker() might be working on an it entry without
5871 * holding the lock. We won't find it on the list either and
5872 * continue and free/destroy it. While holding the lock, spin, to
5873 * avoid the race condition as sctp_iterator_worker() will have to
5874 * wait to re-acquire the lock.
5876 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5877 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5878 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5879 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5883 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5884 if (it->vn != curvnet) {
5887 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5888 if (it->function_atend != NULL) {
5889 (*it->function_atend) (it->pointer, it->val);
5891 SCTP_FREE(it, SCTP_M_ITER);
5893 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5894 SCTP_ITERATOR_LOCK();
5895 if ((sctp_it_ctl.cur_it) &&
5896 (sctp_it_ctl.cur_it->vn == curvnet)) {
5897 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5899 SCTP_ITERATOR_UNLOCK();
5900 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5901 SCTP_WQ_ADDR_LOCK();
5902 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5903 LIST_REMOVE(wi, sctp_nxt_addr);
5904 SCTP_DECR_LADDR_COUNT();
5905 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5906 SCTP_FREE(wi->ifa, SCTP_M_IFA);
5908 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5910 SCTP_WQ_ADDR_UNLOCK();
5913 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5916 SCTP_IPI_ADDR_WLOCK();
5917 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5918 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5919 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5920 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5922 LIST_REMOVE(ifa, next_bucket);
5923 LIST_REMOVE(ifa, next_ifa);
5924 SCTP_FREE(ifa, SCTP_M_IFA);
5927 LIST_REMOVE(ifn, next_bucket);
5928 LIST_REMOVE(ifn, next_ifn);
5929 SCTP_FREE(ifn, SCTP_M_IFN);
5931 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5933 LIST_REMOVE(vrf, next_vrf);
5934 SCTP_FREE(vrf, SCTP_M_VRF);
5936 SCTP_IPI_ADDR_WUNLOCK();
5937 /* free the vrf hashes */
5938 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5939 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5942 * free the TIMEWAIT list elements malloc'd in the function
5943 * sctp_add_vtag_to_timewait()...
5945 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5946 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5947 if (!LIST_EMPTY(chain)) {
5948 prev_twait_block = NULL;
5949 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5950 if (prev_twait_block) {
5951 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5953 prev_twait_block = twait_block;
5955 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5959 /* free the locks and mutexes */
5960 #ifdef SCTP_PACKET_LOGGING
5961 SCTP_IP_PKTLOG_DESTROY();
5963 SCTP_IPI_ADDR_DESTROY();
5964 SCTP_STATLOG_DESTROY();
5965 SCTP_INP_INFO_LOCK_DESTROY();
5967 SCTP_WQ_ADDR_DESTROY();
5969 /* Get rid of other stuff too. */
5970 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5971 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5972 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5973 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5974 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5975 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5977 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5978 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5979 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5980 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5981 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5982 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5983 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5984 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5985 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5986 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5987 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5992 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5993 int offset, int limit,
5994 struct sockaddr *src, struct sockaddr *dst,
5995 struct sockaddr *altsa, uint16_t port)
5998 * grub through the INIT pulling addresses and loading them to the
5999 * nets structure in the asoc. The from address in the mbuf should
6000 * also be loaded (if it is not already). This routine can be called
6001 * with either INIT or INIT-ACK's as long as the m points to the IP
6002 * packet and the offset points to the beginning of the parameters.
6004 struct sctp_inpcb *inp;
6005 struct sctp_nets *net, *nnet, *net_tmp;
6006 struct sctp_paramhdr *phdr, param_buf;
6007 struct sctp_tcb *stcb_tmp;
6008 uint16_t ptype, plen;
6009 struct sockaddr *sa;
6010 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6011 struct sctp_auth_random *p_random = NULL;
6012 uint16_t random_len = 0;
6013 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6014 struct sctp_auth_hmac_algo *hmacs = NULL;
6015 uint16_t hmacs_len = 0;
6016 uint8_t saw_asconf = 0;
6017 uint8_t saw_asconf_ack = 0;
6018 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6019 struct sctp_auth_chunk_list *chunks = NULL;
6020 uint16_t num_chunks = 0;
6021 sctp_key_t *new_key;
6023 int got_random = 0, got_hmacs = 0, got_chklist = 0;
6024 uint8_t peer_supports_ecn;
6025 uint8_t peer_supports_prsctp;
6026 uint8_t peer_supports_auth;
6027 uint8_t peer_supports_asconf;
6028 uint8_t peer_supports_asconf_ack;
6029 uint8_t peer_supports_reconfig;
6030 uint8_t peer_supports_nrsack;
6031 uint8_t peer_supports_pktdrop;
6032 uint8_t peer_supports_idata;
6034 struct sockaddr_in sin;
6037 struct sockaddr_in6 sin6;
6040 /* First get the destination address setup too. */
6042 memset(&sin, 0, sizeof(sin));
6043 sin.sin_family = AF_INET;
6044 sin.sin_len = sizeof(sin);
6045 sin.sin_port = stcb->rport;
6048 memset(&sin6, 0, sizeof(sin6));
6049 sin6.sin6_family = AF_INET6;
6050 sin6.sin6_len = sizeof(struct sockaddr_in6);
6051 sin6.sin6_port = stcb->rport;
6058 peer_supports_idata = 0;
6059 peer_supports_ecn = 0;
6060 peer_supports_prsctp = 0;
6061 peer_supports_auth = 0;
6062 peer_supports_asconf = 0;
6063 peer_supports_asconf_ack = 0;
6064 peer_supports_reconfig = 0;
6065 peer_supports_nrsack = 0;
6066 peer_supports_pktdrop = 0;
6067 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6068 /* mark all addresses that we have currently on the list */
6069 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6071 /* does the source address already exist? if so skip it */
6072 inp = stcb->sctp_ep;
6073 atomic_add_int(&stcb->asoc.refcnt, 1);
6074 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6075 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6077 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6078 /* we must add the source address */
6079 /* no scope set here since we have a tcb already. */
6080 switch (sa->sa_family) {
6083 if (stcb->asoc.scope.ipv4_addr_legal) {
6084 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6092 if (stcb->asoc.scope.ipv6_addr_legal) {
6093 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6103 if (net_tmp != NULL && stcb_tmp == stcb) {
6104 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6105 } else if (stcb_tmp != stcb) {
6106 /* It belongs to another association? */
6108 SCTP_TCB_UNLOCK(stcb_tmp);
6112 if (stcb->asoc.state == 0) {
6113 /* the assoc was freed? */
6116 /* now we must go through each of the params. */
6117 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
6119 ptype = ntohs(phdr->param_type);
6120 plen = ntohs(phdr->param_length);
6122 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6123 * (uint32_t)ptype, (int)plen);
6125 if (offset + plen > limit) {
6128 if (plen < sizeof(struct sctp_paramhdr)) {
6132 if (ptype == SCTP_IPV4_ADDRESS) {
6133 if (stcb->asoc.scope.ipv4_addr_legal) {
6134 struct sctp_ipv4addr_param *p4, p4_buf;
6136 /* ok get the v4 address and check/add */
6137 phdr = sctp_get_next_param(m, offset,
6138 (struct sctp_paramhdr *)&p4_buf,
6140 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6144 p4 = (struct sctp_ipv4addr_param *)phdr;
6145 sin.sin_addr.s_addr = p4->addr;
6146 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6147 /* Skip multi-cast addresses */
6150 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6151 (sin.sin_addr.s_addr == INADDR_ANY)) {
6154 sa = (struct sockaddr *)&sin;
6155 inp = stcb->sctp_ep;
6156 atomic_add_int(&stcb->asoc.refcnt, 1);
6157 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6159 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6161 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6163 /* we must add the source address */
6165 * no scope set since we have a tcb
6170 * we must validate the state again
6174 if (stcb->asoc.state == 0) {
6175 /* the assoc was freed? */
6178 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6181 } else if (stcb_tmp == stcb) {
6182 if (stcb->asoc.state == 0) {
6183 /* the assoc was freed? */
6189 ~SCTP_ADDR_NOT_IN_ASSOC;
6193 * strange, address is in another
6194 * assoc? straighten out locks.
6197 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6198 struct mbuf *op_err;
6199 char msg[SCTP_DIAG_INFO_LEN];
6205 SCTP_SNPRINTF(msg, sizeof(msg),
6206 "%s:%d at %s", __FILE__, __LINE__, __func__);
6207 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6209 sctp_abort_an_association(stcb_tmp->sctp_ep,
6210 stcb_tmp, op_err, false,
6211 SCTP_SO_NOT_LOCKED);
6214 SCTP_TCB_UNLOCK(stcb_tmp);
6217 if (stcb->asoc.state == 0) {
6218 /* the assoc was freed? */
6227 if (ptype == SCTP_IPV6_ADDRESS) {
6228 if (stcb->asoc.scope.ipv6_addr_legal) {
6229 /* ok get the v6 address and check/add */
6230 struct sctp_ipv6addr_param *p6, p6_buf;
6232 phdr = sctp_get_next_param(m, offset,
6233 (struct sctp_paramhdr *)&p6_buf,
6235 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6239 p6 = (struct sctp_ipv6addr_param *)phdr;
6240 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6242 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6243 /* Skip multi-cast addresses */
6246 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6248 * Link local make no sense without
6253 sa = (struct sockaddr *)&sin6;
6254 inp = stcb->sctp_ep;
6255 atomic_add_int(&stcb->asoc.refcnt, 1);
6256 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6258 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6259 if (stcb_tmp == NULL &&
6260 (inp == stcb->sctp_ep || inp == NULL)) {
6262 * we must validate the state again
6266 if (stcb->asoc.state == 0) {
6267 /* the assoc was freed? */
6271 * we must add the address, no scope
6274 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6277 } else if (stcb_tmp == stcb) {
6279 * we must validate the state again
6282 if (stcb->asoc.state == 0) {
6283 /* the assoc was freed? */
6289 ~SCTP_ADDR_NOT_IN_ASSOC;
6293 * strange, address is in another
6294 * assoc? straighten out locks.
6297 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6298 struct mbuf *op_err;
6299 char msg[SCTP_DIAG_INFO_LEN];
6305 SCTP_SNPRINTF(msg, sizeof(msg),
6306 "%s:%d at %s", __FILE__, __LINE__, __func__);
6307 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6309 sctp_abort_an_association(stcb_tmp->sctp_ep,
6310 stcb_tmp, op_err, false,
6311 SCTP_SO_NOT_LOCKED);
6314 SCTP_TCB_UNLOCK(stcb_tmp);
6316 if (stcb->asoc.state == 0) {
6317 /* the assoc was freed? */
6325 if (ptype == SCTP_ECN_CAPABLE) {
6326 peer_supports_ecn = 1;
6327 } else if (ptype == SCTP_ULP_ADAPTATION) {
6328 if (stcb->asoc.state != SCTP_STATE_OPEN) {
6329 struct sctp_adaptation_layer_indication ai,
6332 phdr = sctp_get_next_param(m, offset,
6333 (struct sctp_paramhdr *)&ai, sizeof(ai));
6334 aip = (struct sctp_adaptation_layer_indication *)phdr;
6336 stcb->asoc.peers_adaptation = ntohl(aip->indication);
6337 stcb->asoc.adaptation_needed = 1;
6340 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6341 struct sctp_asconf_addr_param lstore, *fee;
6343 struct sockaddr *lsa = NULL;
6345 struct sctp_asconf_addrv4_param *fii;
6348 if (stcb->asoc.asconf_supported == 0) {
6351 if (plen > sizeof(lstore)) {
6354 if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6357 phdr = sctp_get_next_param(m, offset,
6358 (struct sctp_paramhdr *)&lstore,
6363 fee = (struct sctp_asconf_addr_param *)phdr;
6364 lptype = ntohs(fee->addrp.ph.param_type);
6367 case SCTP_IPV4_ADDRESS:
6369 sizeof(struct sctp_asconf_addrv4_param)) {
6370 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6371 (int)sizeof(struct sctp_asconf_addrv4_param),
6374 fii = (struct sctp_asconf_addrv4_param *)fee;
6375 sin.sin_addr.s_addr = fii->addrp.addr;
6376 lsa = (struct sockaddr *)&sin;
6381 case SCTP_IPV6_ADDRESS:
6383 sizeof(struct sctp_asconf_addr_param)) {
6384 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6385 (int)sizeof(struct sctp_asconf_addr_param),
6388 memcpy(sin6.sin6_addr.s6_addr,
6390 sizeof(fee->addrp.addr));
6391 lsa = (struct sockaddr *)&sin6;
6399 (void)sctp_set_primary_addr(stcb, sa, NULL);
6401 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6402 stcb->asoc.peer_supports_nat = 1;
6403 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6404 /* Peer supports pr-sctp */
6405 peer_supports_prsctp = 1;
6406 } else if (ptype == SCTP_ZERO_CHECKSUM_ACCEPTABLE) {
6408 * Only send zero checksums if the upper layer has
6409 * also enabled the support for this.
6411 if (stcb->asoc.zero_checksum == 1) {
6412 stcb->asoc.zero_checksum = 2;
6414 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6415 /* A supported extension chunk */
6416 struct sctp_supported_chunk_types_param *pr_supported;
6417 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6420 if (plen > sizeof(local_store)) {
6423 phdr = sctp_get_next_param(m, offset,
6424 (struct sctp_paramhdr *)&local_store, plen);
6428 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6429 num_ent = plen - sizeof(struct sctp_paramhdr);
6430 for (i = 0; i < num_ent; i++) {
6431 switch (pr_supported->chunk_types[i]) {
6433 peer_supports_asconf = 1;
6435 case SCTP_ASCONF_ACK:
6436 peer_supports_asconf_ack = 1;
6438 case SCTP_FORWARD_CUM_TSN:
6439 peer_supports_prsctp = 1;
6441 case SCTP_PACKET_DROPPED:
6442 peer_supports_pktdrop = 1;
6444 case SCTP_NR_SELECTIVE_ACK:
6445 peer_supports_nrsack = 1;
6447 case SCTP_STREAM_RESET:
6448 peer_supports_reconfig = 1;
6450 case SCTP_AUTHENTICATION:
6451 peer_supports_auth = 1;
6454 peer_supports_idata = 1;
6457 /* one I have not learned yet */
6461 } else if (ptype == SCTP_RANDOM) {
6462 if (plen > sizeof(random_store))
6465 /* already processed a RANDOM */
6468 phdr = sctp_get_next_param(m, offset,
6469 (struct sctp_paramhdr *)random_store,
6473 p_random = (struct sctp_auth_random *)phdr;
6474 random_len = plen - sizeof(*p_random);
6475 /* enforce the random length */
6476 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6477 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6481 } else if (ptype == SCTP_HMAC_LIST) {
6485 if (plen > sizeof(hmacs_store))
6488 /* already processed a HMAC list */
6491 phdr = sctp_get_next_param(m, offset,
6492 (struct sctp_paramhdr *)hmacs_store,
6496 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6497 hmacs_len = plen - sizeof(*hmacs);
6498 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6499 /* validate the hmac list */
6500 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6503 if (stcb->asoc.peer_hmacs != NULL)
6504 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6505 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6506 if (stcb->asoc.peer_hmacs != NULL) {
6507 for (i = 0; i < num_hmacs; i++) {
6508 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6509 ntohs(hmacs->hmac_ids[i]));
6513 } else if (ptype == SCTP_CHUNK_LIST) {
6516 if (plen > sizeof(chunks_store))
6519 /* already processed a Chunks list */
6522 phdr = sctp_get_next_param(m, offset,
6523 (struct sctp_paramhdr *)chunks_store,
6527 chunks = (struct sctp_auth_chunk_list *)phdr;
6528 num_chunks = plen - sizeof(*chunks);
6529 if (stcb->asoc.peer_auth_chunks != NULL)
6530 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6532 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6533 for (i = 0; i < num_chunks; i++) {
6534 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6535 stcb->asoc.peer_auth_chunks);
6536 /* record asconf/asconf-ack if listed */
6537 if (chunks->chunk_types[i] == SCTP_ASCONF)
6539 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6543 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6544 (ptype == SCTP_STATE_COOKIE) ||
6545 (ptype == SCTP_UNRECOG_PARAM) ||
6546 (ptype == SCTP_COOKIE_PRESERVE) ||
6547 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6548 (ptype == SCTP_ADD_IP_ADDRESS) ||
6549 (ptype == SCTP_DEL_IP_ADDRESS) ||
6550 (ptype == SCTP_ERROR_CAUSE_IND) ||
6551 (ptype == SCTP_SUCCESS_REPORT)) {
6554 if ((ptype & 0x8000) == 0x0000) {
6556 * must stop processing the rest of the
6557 * param's. Any report bits were handled
6559 * sctp_arethere_unrecognized_parameters()
6560 * when the INIT or INIT-ACK was first seen.
6567 offset += SCTP_SIZE32(plen);
6568 if (offset >= limit) {
6571 phdr = sctp_get_next_param(m, offset, ¶m_buf,
6574 /* Now check to see if we need to purge any addresses */
6575 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6576 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6577 SCTP_ADDR_NOT_IN_ASSOC) {
6578 /* This address has been removed from the asoc */
6579 /* remove and free it */
6580 stcb->asoc.numnets--;
6581 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6582 if (net == stcb->asoc.alternate) {
6583 sctp_free_remote_addr(stcb->asoc.alternate);
6584 stcb->asoc.alternate = NULL;
6586 if (net == stcb->asoc.primary_destination) {
6587 stcb->asoc.primary_destination = NULL;
6588 sctp_select_primary_destination(stcb);
6590 sctp_free_remote_addr(net);
6593 if ((stcb->asoc.ecn_supported == 1) &&
6594 (peer_supports_ecn == 0)) {
6595 stcb->asoc.ecn_supported = 0;
6597 if ((stcb->asoc.prsctp_supported == 1) &&
6598 (peer_supports_prsctp == 0)) {
6599 stcb->asoc.prsctp_supported = 0;
6601 if ((stcb->asoc.auth_supported == 1) &&
6602 ((peer_supports_auth == 0) ||
6603 (got_random == 0) || (got_hmacs == 0))) {
6604 stcb->asoc.auth_supported = 0;
6606 if ((stcb->asoc.asconf_supported == 1) &&
6607 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6608 (stcb->asoc.auth_supported == 0) ||
6609 (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6610 stcb->asoc.asconf_supported = 0;
6612 if ((stcb->asoc.reconfig_supported == 1) &&
6613 (peer_supports_reconfig == 0)) {
6614 stcb->asoc.reconfig_supported = 0;
6616 if ((stcb->asoc.idata_supported == 1) &&
6617 (peer_supports_idata == 0)) {
6618 stcb->asoc.idata_supported = 0;
6620 if ((stcb->asoc.nrsack_supported == 1) &&
6621 (peer_supports_nrsack == 0)) {
6622 stcb->asoc.nrsack_supported = 0;
6624 if ((stcb->asoc.pktdrop_supported == 1) &&
6625 (peer_supports_pktdrop == 0)) {
6626 stcb->asoc.pktdrop_supported = 0;
6628 /* validate authentication required parameters */
6629 if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6630 /* peer does not support auth but sent a chunks list? */
6633 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6634 /* peer supports asconf but not auth? */
6636 } else if ((peer_supports_asconf == 1) &&
6637 (peer_supports_auth == 1) &&
6638 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6641 /* concatenate the full random key */
6642 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6643 if (chunks != NULL) {
6644 keylen += sizeof(*chunks) + num_chunks;
6646 new_key = sctp_alloc_key(keylen);
6647 if (new_key != NULL) {
6648 /* copy in the RANDOM */
6649 if (p_random != NULL) {
6650 keylen = sizeof(*p_random) + random_len;
6651 memcpy(new_key->key, p_random, keylen);
6655 /* append in the AUTH chunks */
6656 if (chunks != NULL) {
6657 memcpy(new_key->key + keylen, chunks,
6658 sizeof(*chunks) + num_chunks);
6659 keylen += sizeof(*chunks) + num_chunks;
6661 /* append in the HMACs */
6662 if (hmacs != NULL) {
6663 memcpy(new_key->key + keylen, hmacs,
6664 sizeof(*hmacs) + hmacs_len);
6667 /* failed to get memory for the key */
6670 if (stcb->asoc.authinfo.peer_random != NULL)
6671 sctp_free_key(stcb->asoc.authinfo.peer_random);
6672 stcb->asoc.authinfo.peer_random = new_key;
6673 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6674 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6680 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6681 struct sctp_nets *net)
6683 /* make sure the requested primary address exists in the assoc */
6684 if (net == NULL && sa)
6685 net = sctp_findnet(stcb, sa);
6688 /* didn't find the requested primary address! */
6691 /* set the primary address */
6692 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6693 /* Must be confirmed, so queue to set */
6694 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6697 stcb->asoc.primary_destination = net;
6698 if (((net->dest_state & SCTP_ADDR_PF) == 0) &&
6699 (stcb->asoc.alternate != NULL)) {
6700 sctp_free_remote_addr(stcb->asoc.alternate);
6701 stcb->asoc.alternate = NULL;
6703 net = TAILQ_FIRST(&stcb->asoc.nets);
6704 if (net != stcb->asoc.primary_destination) {
6706 * first one on the list is NOT the primary
6707 * sctp_cmpaddr() is much more efficient if the
6708 * primary is the first on the list, make it so.
6710 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6711 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6718 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6720 struct sctpasochead *head;
6721 struct sctp_tcb *stcb;
6723 SCTP_INP_INFO_LOCK_ASSERT();
6725 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))];
6726 LIST_FOREACH(stcb, head, sctp_asocs) {
6728 * We choose not to lock anything here. TCB's can't be
6729 * removed since we have the read lock, so they can't be
6730 * freed on us, same thing for the INP. I may be wrong with
6731 * this assumption, but we will go with it for now :-)
6733 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6736 if (stcb->asoc.my_vtag == tag) {
6738 if (stcb->rport != rport) {
6741 if (stcb->sctp_ep->sctp_lport != lport) {
6744 /* The tag is currently used, so don't use it. */
6748 return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec));
6752 sctp_drain_mbufs(struct sctp_tcb *stcb)
6755 * We must hunt this association for MBUF's past the cumack (i.e.
6756 * out of order data that we can renege on).
6758 struct sctp_association *asoc;
6759 struct sctp_tmit_chunk *chk, *nchk;
6760 uint32_t cumulative_tsn_p1;
6761 struct sctp_queued_to_read *control, *ncontrol;
6766 /* We look for anything larger than the cum-ack + 1 */
6769 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6770 /* none we can reneg on. */
6773 SCTP_STAT_INCR(sctps_protocol_drains_done);
6774 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6776 /* Ok that was fun, now we will drain all the inbound streams? */
6777 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6778 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6780 if (control->on_strm_q != SCTP_ON_ORDERED) {
6781 panic("Huh control: %p on_q: %d -- not ordered?",
6782 control, control->on_strm_q);
6785 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6786 /* Yep it is above cum-ack */
6788 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6789 KASSERT(control->length > 0, ("control has zero length"));
6790 if (asoc->size_on_all_streams >= control->length) {
6791 asoc->size_on_all_streams -= control->length;
6794 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6796 asoc->size_on_all_streams = 0;
6799 sctp_ucount_decr(asoc->cnt_on_all_streams);
6800 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6801 if (control->on_read_q) {
6802 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6803 control->on_read_q = 0;
6805 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6806 control->on_strm_q = 0;
6807 if (control->data) {
6808 sctp_m_freem(control->data);
6809 control->data = NULL;
6811 sctp_free_remote_addr(control->whoFrom);
6812 /* Now its reasm? */
6813 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6815 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6816 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6817 if (asoc->size_on_reasm_queue >= chk->send_size) {
6818 asoc->size_on_reasm_queue -= chk->send_size;
6821 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6823 asoc->size_on_reasm_queue = 0;
6826 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6827 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6828 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6830 sctp_m_freem(chk->data);
6833 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6835 sctp_free_a_readq(stcb, control);
6838 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6840 if (control->on_strm_q != SCTP_ON_UNORDERED) {
6841 panic("Huh control: %p on_q: %d -- not unordered?",
6842 control, control->on_strm_q);
6845 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6846 /* Yep it is above cum-ack */
6848 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6849 KASSERT(control->length > 0, ("control has zero length"));
6850 if (asoc->size_on_all_streams >= control->length) {
6851 asoc->size_on_all_streams -= control->length;
6854 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6856 asoc->size_on_all_streams = 0;
6859 sctp_ucount_decr(asoc->cnt_on_all_streams);
6860 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6861 if (control->on_read_q) {
6862 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6863 control->on_read_q = 0;
6865 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6866 control->on_strm_q = 0;
6867 if (control->data) {
6868 sctp_m_freem(control->data);
6869 control->data = NULL;
6871 sctp_free_remote_addr(control->whoFrom);
6872 /* Now its reasm? */
6873 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6875 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6876 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6877 if (asoc->size_on_reasm_queue >= chk->send_size) {
6878 asoc->size_on_reasm_queue -= chk->send_size;
6881 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6883 asoc->size_on_reasm_queue = 0;
6886 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6887 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6888 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6890 sctp_m_freem(chk->data);
6893 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6895 sctp_free_a_readq(stcb, control);
6900 /* We must back down to see what the new highest is */
6901 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6902 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6903 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6904 asoc->highest_tsn_inside_map = i;
6910 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6914 * Question, should we go through the delivery queue? The
6915 * only reason things are on here is the app not reading OR
6916 * a p-d-api up. An attacker COULD send enough in to
6917 * initiate the PD-API and then send a bunch of stuff to
6918 * other streams... these would wind up on the delivery
6919 * queue.. and then we would not get to them. But in order
6920 * to do this I then have to back-track and un-deliver
6921 * sequence numbers in streams.. el-yucko. I think for now
6922 * we will NOT look at the delivery queue and leave it to be
6923 * something to consider later. An alternative would be to
6924 * abort the P-D-API with a notification and then deliver
6925 * the data.... Or another method might be to keep track of
6926 * how many times the situation occurs and if we see a
6927 * possible attack underway just abort the association.
6930 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6933 * Now do we need to find a new
6934 * asoc->highest_tsn_inside_map?
6936 asoc->last_revoke_count = cnt;
6937 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6938 SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6939 /* sa_ignore NO_NULL_CHK */
6940 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6941 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6944 * Another issue, in un-setting the TSN's in the mapping array we
6945 * DID NOT adjust the highest_tsn marker. This will cause one of
6946 * two things to occur. It may cause us to do extra work in checking
6947 * for our mapping array movement. More importantly it may cause us
6948 * to SACK every datagram. This may not be a bad thing though since
6949 * we will recover once we get our cum-ack above and all this stuff
6950 * we dumped recovered.
6957 struct epoch_tracker et;
6959 VNET_ITERATOR_DECL(vnet_iter);
6961 NET_EPOCH_ENTER(et);
6963 * We must walk the PCB lists for ALL associations here. The system
6964 * is LOW on MBUF's and needs help. This is where reneging will
6965 * occur. We really hope this does NOT happen!
6967 VNET_LIST_RLOCK_NOSLEEP();
6968 VNET_FOREACH(vnet_iter) {
6969 CURVNET_SET(vnet_iter);
6970 struct sctp_inpcb *inp;
6971 struct sctp_tcb *stcb;
6973 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6974 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6982 SCTP_INP_INFO_RLOCK();
6983 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6984 /* For each endpoint */
6985 SCTP_INP_RLOCK(inp);
6986 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6987 /* For each association */
6988 SCTP_TCB_LOCK(stcb);
6989 sctp_drain_mbufs(stcb);
6990 SCTP_TCB_UNLOCK(stcb);
6992 SCTP_INP_RUNLOCK(inp);
6994 SCTP_INP_INFO_RUNLOCK();
6997 VNET_LIST_RUNLOCK_NOSLEEP();
7001 EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT);
7002 EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT);
7005 * start a new iterator
7006 * iterates through all endpoints and associations based on the pcb_state
7007 * flags and asoc_state. "af" (mandatory) is executed for all matching
7008 * assocs and "ef" (optional) is executed when the iterator completes.
7009 * "inpf" (optional) is executed for each new endpoint as it is being
7010 * iterated through. inpe (optional) is called when the inp completes
7011 * its way through all the stcbs.
7014 sctp_initiate_iterator(inp_func inpf,
7018 uint32_t pcb_features,
7019 uint32_t asoc_state,
7023 struct sctp_inpcb *s_inp,
7024 uint8_t chunk_output_off)
7026 struct sctp_iterator *it = NULL;
7031 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7032 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7033 SCTP_BASE_VAR(sctp_pcb_initialized));
7036 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7039 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7042 memset(it, 0, sizeof(*it));
7043 it->function_assoc = af;
7044 it->function_inp = inpf;
7046 it->done_current_ep = 0;
7048 it->done_current_ep = 1;
7049 it->function_atend = ef;
7052 it->pcb_flags = pcb_state;
7053 it->pcb_features = pcb_features;
7054 it->asoc_state = asoc_state;
7055 it->function_inp_end = inpe;
7056 it->no_chunk_output = chunk_output_off;
7059 /* Assume lock is held here */
7061 SCTP_INP_INCR_REF(it->inp);
7062 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7064 SCTP_INP_INFO_RLOCK();
7065 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7067 SCTP_INP_INCR_REF(it->inp);
7069 SCTP_INP_INFO_RUNLOCK();
7070 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7072 SCTP_IPI_ITERATOR_WQ_LOCK();
7073 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7074 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7075 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7076 SCTP_BASE_VAR(sctp_pcb_initialized), it);
7077 SCTP_FREE(it, SCTP_M_ITER);
7080 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7081 if (sctp_it_ctl.iterator_running == 0) {
7082 sctp_wakeup_iterator();
7084 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7085 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7090 * Atomically add flags to the sctp_flags of an inp.
7091 * To be used when the write lock of the inp is not held.
7094 sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags)
7096 uint32_t old_flags, new_flags;
7099 old_flags = inp->sctp_flags;
7100 new_flags = old_flags | flags;
7101 } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0);