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);
194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
196 struct sctp_ifn *sctp_ifnp;
197 struct sctp_ifnlist *hash_ifn_head;
200 * We assume the lock is held for the addresses if that's wrong
201 * problems could occur :-)
203 SCTP_IPI_ADDR_LOCK_ASSERT();
204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
206 if (sctp_ifnp->ifn_index == ifn_index) {
209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
218 sctp_find_vrf(uint32_t vrf_id)
220 struct sctp_vrflist *bucket;
221 struct sctp_vrf *liste;
223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
224 LIST_FOREACH(liste, bucket, next_vrf) {
225 if (vrf_id == liste->vrf_id) {
234 sctp_free_vrf(struct sctp_vrf *vrf)
236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
237 if (vrf->vrf_addr_hash) {
238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
239 vrf->vrf_addr_hash = NULL;
241 /* We zero'd the count */
242 LIST_REMOVE(vrf, next_vrf);
243 SCTP_FREE(vrf, SCTP_M_VRF);
244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
252 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
253 /* We zero'd the count */
254 if (sctp_ifnp->vrf) {
255 sctp_free_vrf(sctp_ifnp->vrf);
257 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
258 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
266 struct sctp_ifn *sctp_ifnp;
268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
269 if (sctp_ifnp != NULL) {
270 sctp_ifnp->ifn_mtu = mtu;
276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
279 /* We zero'd the count */
280 if (sctp_ifap->ifn_p) {
281 sctp_free_ifn(sctp_ifap->ifn_p);
283 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
292 struct sctp_ifn *found;
294 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
296 /* Not in the list.. sorry */
299 if (hold_addr_lock == 0) {
300 SCTP_IPI_ADDR_WLOCK();
302 SCTP_IPI_ADDR_WLOCK_ASSERT();
304 LIST_REMOVE(sctp_ifnp, next_bucket);
305 LIST_REMOVE(sctp_ifnp, next_ifn);
306 if (hold_addr_lock == 0) {
307 SCTP_IPI_ADDR_WUNLOCK();
309 /* Take away the reference, and possibly free it */
310 sctp_free_ifn(sctp_ifnp);
315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
316 const char *if_name, uint32_t ifn_index)
318 struct sctp_vrf *vrf;
319 struct sctp_ifa *sctp_ifap;
321 SCTP_IPI_ADDR_RLOCK();
322 vrf = sctp_find_vrf(vrf_id);
324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
328 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
329 if (sctp_ifap == NULL) {
330 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
333 if (sctp_ifap->ifn_p == NULL) {
334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
338 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
340 sctp_ifap->ifn_p->ifn_name, if_name);
344 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
345 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
346 sctp_ifap->ifn_p->ifn_index, ifn_index);
351 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
352 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
354 SCTP_IPI_ADDR_RUNLOCK();
359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
360 const char *if_name, uint32_t ifn_index)
362 struct sctp_vrf *vrf;
363 struct sctp_ifa *sctp_ifap;
365 SCTP_IPI_ADDR_RLOCK();
366 vrf = sctp_find_vrf(vrf_id);
368 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
372 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
373 if (sctp_ifap == NULL) {
374 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
377 if (sctp_ifap->ifn_p == NULL) {
378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
382 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
384 sctp_ifap->ifn_p->ifn_name, if_name);
388 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
389 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
390 sctp_ifap->ifn_p->ifn_index, ifn_index);
395 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
396 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
398 SCTP_IPI_ADDR_RUNLOCK();
403 * Add an ifa to an ifn.
404 * Register the interface as necessary.
405 * NOTE: ADDR write lock MUST be held.
408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
412 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
413 sctp_ifap->ifn_p = sctp_ifnp;
414 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
415 /* update address counts */
416 sctp_ifnp->ifa_count++;
417 ifa_af = sctp_ifap->address.sa.sa_family;
432 if (sctp_ifnp->ifa_count == 1) {
433 /* register the new interface */
434 sctp_ifnp->registered_af = ifa_af;
440 * Remove an ifa from its ifn.
441 * If no more addresses exist, remove the ifn too. Otherwise, re-register
442 * the interface based on the remaining address families left.
443 * NOTE: ADDR write lock MUST be held.
446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
448 LIST_REMOVE(sctp_ifap, next_ifa);
449 if (sctp_ifap->ifn_p) {
450 /* update address counts */
451 sctp_ifap->ifn_p->ifa_count--;
452 switch (sctp_ifap->address.sa.sa_family) {
455 sctp_ifap->ifn_p->num_v4--;
460 sctp_ifap->ifn_p->num_v6--;
467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
468 /* remove the ifn, possibly freeing it */
469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
471 /* re-register address family type, if needed */
472 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
474 sctp_ifap->ifn_p->registered_af = AF_INET;
475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
476 (sctp_ifap->ifn_p->registered_af == AF_INET)) {
477 sctp_ifap->ifn_p->registered_af = AF_INET6;
479 /* free the ifn refcount */
480 sctp_free_ifn(sctp_ifap->ifn_p);
482 sctp_ifap->ifn_p = NULL;
488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
489 uint32_t ifn_type, const char *if_name, void *ifa,
490 struct sockaddr *addr, uint32_t ifa_flags,
493 struct sctp_vrf *vrf;
494 struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
495 struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
496 struct sctp_ifalist *hash_addr_head;
497 struct sctp_ifnlist *hash_ifn_head;
498 uint32_t hash_of_addr;
502 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
503 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
505 SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
506 sizeof(struct sctp_ifn), SCTP_M_IFN);
507 if (new_sctp_ifnp == NULL) {
509 panic("No memory for IFN");
513 SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
514 if (new_sctp_ifap == NULL) {
516 panic("No memory for IFA");
518 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
522 SCTP_IPI_ADDR_WLOCK();
523 sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
525 vrf = sctp_ifnp->vrf;
527 vrf = sctp_find_vrf(vrf_id);
529 vrf = sctp_allocate_vrf(vrf_id);
531 SCTP_IPI_ADDR_WUNLOCK();
532 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
533 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
538 if (sctp_ifnp == NULL) {
540 * build one and add it, can't hold lock until after malloc
543 sctp_ifnp = new_sctp_ifnp;
544 new_sctp_ifnp = NULL;
545 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
546 sctp_ifnp->ifn_index = ifn_index;
547 sctp_ifnp->ifn_p = ifn;
548 sctp_ifnp->ifn_type = ifn_type;
549 sctp_ifnp->refcount = 0;
550 sctp_ifnp->vrf = vrf;
551 atomic_add_int(&vrf->refcount, 1);
552 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
553 if (if_name != NULL) {
554 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
556 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
558 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
559 LIST_INIT(&sctp_ifnp->ifalist);
560 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
561 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
562 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
565 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
567 /* Hmm, it already exists? */
568 if ((sctp_ifap->ifn_p) &&
569 (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
570 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
571 sctp_ifap->ifn_p->ifn_name, ifn_index,
574 /* Remove the created one that we don't want */
575 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
577 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
578 /* easy to solve, just switch back to active */
579 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
580 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
581 sctp_ifap->ifn_p = sctp_ifnp;
582 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
585 SCTP_IPI_ADDR_WUNLOCK();
586 if (new_sctp_ifnp != NULL) {
587 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
589 SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
592 if (sctp_ifap->ifn_p) {
594 * The last IFN gets the address, remove the
597 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
598 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
599 sctp_ifap->ifn_p->ifn_index, if_name,
601 /* remove the address from the old ifn */
602 sctp_remove_ifa_from_ifn(sctp_ifap);
603 /* move the address over to the new ifn */
604 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
605 goto exit_stage_left;
607 /* repair ifnp which was NULL ? */
608 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
609 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
610 (void *)sctp_ifnp, (void *)sctp_ifap);
611 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
613 goto exit_stage_left;
616 sctp_ifap = new_sctp_ifap;
617 memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
618 sctp_ifap->ifn_p = sctp_ifnp;
619 atomic_add_int(&sctp_ifnp->refcount, 1);
620 sctp_ifap->vrf_id = vrf_id;
621 sctp_ifap->ifa = ifa;
622 memcpy(&sctp_ifap->address, addr, addr->sa_len);
623 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
624 sctp_ifap->flags = ifa_flags;
626 switch (sctp_ifap->address.sa.sa_family) {
630 struct sockaddr_in *sin;
632 sin = &sctp_ifap->address.sin;
633 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
634 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
635 sctp_ifap->src_is_loop = 1;
637 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
638 sctp_ifap->src_is_priv = 1;
642 new_ifn_af = AF_INET;
649 /* ok to use deprecated addresses? */
650 struct sockaddr_in6 *sin6;
652 sin6 = &sctp_ifap->address.sin6;
653 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
654 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
655 sctp_ifap->src_is_loop = 1;
657 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
658 sctp_ifap->src_is_priv = 1;
662 new_ifn_af = AF_INET6;
670 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
672 if ((sctp_ifap->src_is_priv == 0) &&
673 (sctp_ifap->src_is_loop == 0)) {
674 sctp_ifap->src_is_glob = 1;
676 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
677 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
678 sctp_ifap->refcount = 1;
679 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
680 sctp_ifnp->ifa_count++;
681 vrf->total_ifa_count++;
682 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
684 sctp_ifnp->registered_af = new_ifn_af;
686 SCTP_IPI_ADDR_WUNLOCK();
687 if (new_sctp_ifnp != NULL) {
688 SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
693 * Bump up the refcount so that when the timer completes it
694 * will drop back down.
696 struct sctp_laddr *wi;
698 atomic_add_int(&sctp_ifap->refcount, 1);
699 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
702 * Gak, what can we do? We have lost an address
703 * change can you say HOSED?
705 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
706 /* Opps, must decrement the count */
707 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
711 SCTP_INCR_LADDR_COUNT();
712 memset(wi, 0, sizeof(*wi));
713 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
715 wi->action = SCTP_ADD_IP_ADDRESS;
718 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
719 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
720 (struct sctp_inpcb *)NULL,
721 (struct sctp_tcb *)NULL,
722 (struct sctp_nets *)NULL);
723 SCTP_WQ_ADDR_UNLOCK();
725 /* it's ready for use */
726 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
732 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
733 uint32_t ifn_index, const char *if_name)
735 struct sctp_vrf *vrf;
736 struct sctp_ifa *sctp_ifap = NULL;
738 SCTP_IPI_ADDR_WLOCK();
739 vrf = sctp_find_vrf(vrf_id);
741 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
746 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
747 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
749 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
751 /* Validate the delete */
752 if (sctp_ifap->ifn_p) {
756 * The name has priority over the ifn_index
760 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
761 /* They match its a correct delete */
766 /* last ditch check ifn_index */
767 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
772 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
773 ifn_index, ((if_name == NULL) ? "NULL" : if_name));
774 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
775 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
776 SCTP_IPI_ADDR_WUNLOCK();
780 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
781 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
783 * We don't set the flag. This means that the structure will
784 * hang around in EP's that have bound specific to it until
785 * they close. This gives us TCP like behavior if someone
786 * removes an address (or for that matter adds it right
789 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
790 vrf->total_ifa_count--;
791 LIST_REMOVE(sctp_ifap, next_bucket);
792 sctp_remove_ifa_from_ifn(sctp_ifap);
796 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
798 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
803 SCTP_IPI_ADDR_WUNLOCK();
805 struct sctp_laddr *wi;
807 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
810 * Gak, what can we do? We have lost an address
811 * change can you say HOSED?
813 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
815 /* Oops, must decrement the count */
816 sctp_free_ifa(sctp_ifap);
819 SCTP_INCR_LADDR_COUNT();
820 memset(wi, 0, sizeof(*wi));
821 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
823 wi->action = SCTP_DEL_IP_ADDRESS;
826 * Should this really be a tailq? As it is we will process
827 * the newest first :-0
829 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
830 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
831 (struct sctp_inpcb *)NULL,
832 (struct sctp_tcb *)NULL,
833 (struct sctp_nets *)NULL);
834 SCTP_WQ_ADDR_UNLOCK();
841 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
845 int ipv4_local_scope, ipv4_addr_legal;
848 int local_scope, site_scope, ipv6_addr_legal;
850 struct sctp_vrf *vrf;
851 struct sctp_ifn *sctp_ifn;
852 struct sctp_ifa *sctp_ifa;
854 loopback_scope = stcb->asoc.scope.loopback_scope;
856 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
857 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
860 local_scope = stcb->asoc.scope.local_scope;
861 site_scope = stcb->asoc.scope.site_scope;
862 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
865 SCTP_IPI_ADDR_RLOCK();
866 vrf = sctp_find_vrf(stcb->asoc.vrf_id);
868 /* no vrf, no addresses */
869 SCTP_IPI_ADDR_RUNLOCK();
873 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
874 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
875 if ((loopback_scope == 0) &&
876 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
879 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
880 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
881 (!sctp_is_addr_pending(stcb, sctp_ifa))) {
883 * We allow pending addresses, where
884 * we have sent an asconf-add to be
889 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
892 switch (sctp_ifa->address.sa.sa_family) {
895 if (ipv4_addr_legal) {
896 struct sockaddr_in *sin,
899 sin = &sctp_ifa->address.sin;
900 rsin = (struct sockaddr_in *)to;
901 if ((ipv4_local_scope == 0) &&
902 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
905 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
906 &sin->sin_addr) != 0) {
909 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
910 SCTP_IPI_ADDR_RUNLOCK();
918 if (ipv6_addr_legal) {
919 struct sockaddr_in6 *sin6,
922 sin6 = &sctp_ifa->address.sin6;
923 rsin6 = (struct sockaddr_in6 *)to;
924 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
925 &sin6->sin6_addr) != 0) {
928 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
929 if (local_scope == 0)
931 if (sin6->sin6_scope_id == 0) {
932 if (sa6_recoverscope(sin6) != 0)
936 if ((site_scope == 0) &&
937 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
940 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
941 SCTP_IPI_ADDR_RUNLOCK();
954 struct sctp_laddr *laddr;
956 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
957 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
958 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
961 if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
962 (!sctp_is_addr_pending(stcb, laddr->ifa))) {
964 * We allow pending addresses, where we have
965 * sent an asconf-add to be considered
970 if (laddr->ifa->address.sa.sa_family != to->sa_family) {
973 switch (to->sa_family) {
977 struct sockaddr_in *sin, *rsin;
979 sin = &laddr->ifa->address.sin;
980 rsin = (struct sockaddr_in *)to;
981 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
982 SCTP_IPI_ADDR_RUNLOCK();
991 struct sockaddr_in6 *sin6, *rsin6;
993 sin6 = &laddr->ifa->address.sin6;
994 rsin6 = (struct sockaddr_in6 *)to;
995 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
996 SCTP_IPI_ADDR_RUNLOCK();
1010 SCTP_IPI_ADDR_RUNLOCK();
1015 static struct sctp_tcb *
1016 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1017 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1019 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1021 * If we support the TCP model, then we must now dig through to see
1022 * if we can find our endpoint in the list of tcp ep's.
1024 uint16_t lport, rport;
1025 struct sctppcbhead *ephead;
1026 struct sctp_inpcb *inp;
1027 struct sctp_laddr *laddr;
1028 struct sctp_tcb *stcb;
1029 struct sctp_nets *net;
1031 if ((to == NULL) || (from == NULL)) {
1035 switch (to->sa_family) {
1038 if (from->sa_family == AF_INET) {
1039 lport = ((struct sockaddr_in *)to)->sin_port;
1040 rport = ((struct sockaddr_in *)from)->sin_port;
1048 if (from->sa_family == AF_INET6) {
1049 lport = ((struct sockaddr_in6 *)to)->sin6_port;
1050 rport = ((struct sockaddr_in6 *)from)->sin6_port;
1059 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1061 * Ok now for each of the guys in this bucket we must look and see:
1062 * - Does the remote port match. - Does there single association's
1063 * addresses match this address (to). If so we update p_ep to point
1064 * to this ep and return the tcb from it.
1066 LIST_FOREACH(inp, ephead, sctp_hash) {
1067 SCTP_INP_RLOCK(inp);
1068 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1069 SCTP_INP_RUNLOCK(inp);
1072 if (lport != inp->sctp_lport) {
1073 SCTP_INP_RUNLOCK(inp);
1076 switch (to->sa_family) {
1080 struct sockaddr_in *sin;
1082 sin = (struct sockaddr_in *)to;
1083 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1084 &sin->sin_addr) != 0) {
1085 SCTP_INP_RUNLOCK(inp);
1094 struct sockaddr_in6 *sin6;
1096 sin6 = (struct sockaddr_in6 *)to;
1097 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1098 &sin6->sin6_addr) != 0) {
1099 SCTP_INP_RUNLOCK(inp);
1106 SCTP_INP_RUNLOCK(inp);
1109 if (inp->def_vrf_id != vrf_id) {
1110 SCTP_INP_RUNLOCK(inp);
1113 /* check to see if the ep has one of the addresses */
1114 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1115 /* We are NOT bound all, so look further */
1118 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1120 if (laddr->ifa == NULL) {
1121 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1124 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1125 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1128 if (laddr->ifa->address.sa.sa_family ==
1130 /* see if it matches */
1132 if (from->sa_family == AF_INET) {
1133 struct sockaddr_in *intf_addr,
1136 intf_addr = &laddr->ifa->address.sin;
1137 sin = (struct sockaddr_in *)to;
1138 if (sin->sin_addr.s_addr ==
1139 intf_addr->sin_addr.s_addr) {
1146 if (from->sa_family == AF_INET6) {
1147 struct sockaddr_in6 *intf_addr6;
1148 struct sockaddr_in6 *sin6;
1150 sin6 = (struct sockaddr_in6 *)
1152 intf_addr6 = &laddr->ifa->address.sin6;
1154 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1164 /* This endpoint does not have this address */
1165 SCTP_INP_RUNLOCK(inp);
1170 * Ok if we hit here the ep has the address, does it hold
1173 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1174 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1176 SCTP_INP_RUNLOCK(inp);
1179 SCTP_TCB_LOCK(stcb);
1180 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1181 SCTP_TCB_UNLOCK(stcb);
1182 SCTP_INP_RUNLOCK(inp);
1185 if (stcb->rport != rport) {
1186 /* remote port does not match. */
1187 SCTP_TCB_UNLOCK(stcb);
1188 SCTP_INP_RUNLOCK(inp);
1191 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1192 SCTP_TCB_UNLOCK(stcb);
1193 SCTP_INP_RUNLOCK(inp);
1196 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1197 SCTP_TCB_UNLOCK(stcb);
1198 SCTP_INP_RUNLOCK(inp);
1201 /* Does this TCB have a matching address? */
1202 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1204 if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1205 /* not the same family, can't be a match */
1208 switch (from->sa_family) {
1212 struct sockaddr_in *sin, *rsin;
1214 sin = (struct sockaddr_in *)&net->ro._l_addr;
1215 rsin = (struct sockaddr_in *)from;
1216 if (sin->sin_addr.s_addr ==
1217 rsin->sin_addr.s_addr) {
1223 * Update the endpoint
1227 SCTP_INP_RUNLOCK(inp);
1236 struct sockaddr_in6 *sin6, *rsin6;
1238 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1239 rsin6 = (struct sockaddr_in6 *)from;
1240 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1247 * Update the endpoint
1251 SCTP_INP_RUNLOCK(inp);
1262 SCTP_TCB_UNLOCK(stcb);
1263 SCTP_INP_RUNLOCK(inp);
1272 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1273 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1274 * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1279 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1280 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1282 struct sctpasochead *head;
1283 struct sctp_inpcb *inp;
1284 struct sctp_tcb *stcb = NULL;
1285 struct sctp_nets *net;
1289 switch (remote->sa_family) {
1292 rport = (((struct sockaddr_in *)remote)->sin_port);
1297 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1305 * UN-lock so we can do proper locking here this occurs when
1306 * called from load_addresses_from_init.
1308 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1309 SCTP_TCB_UNLOCK(locked_tcb);
1311 SCTP_INP_INFO_RLOCK();
1312 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1313 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1315 * Now either this guy is our listener or it's the
1316 * connector. If it is the one that issued the connect, then
1317 * it's only chance is to be the first TCB in the list. If
1318 * it is the acceptor, then do the special_lookup to hash
1319 * and find the real inp.
1321 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1322 /* to is peer addr, from is my addr */
1323 stcb = sctp_tcb_special_locate(inp_p, remote, local,
1324 netp, inp->def_vrf_id);
1325 if ((stcb != NULL) && (locked_tcb == NULL)) {
1326 /* we have a locked tcb, lower refcount */
1327 SCTP_INP_DECR_REF(inp);
1329 if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1330 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1331 SCTP_TCB_LOCK(locked_tcb);
1332 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1333 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1335 SCTP_INP_INFO_RUNLOCK();
1338 SCTP_INP_WLOCK(inp);
1339 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1342 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1346 SCTP_TCB_LOCK(stcb);
1348 if (stcb->rport != rport) {
1349 /* remote port does not match. */
1350 SCTP_TCB_UNLOCK(stcb);
1353 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1354 SCTP_TCB_UNLOCK(stcb);
1357 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1358 SCTP_TCB_UNLOCK(stcb);
1361 /* now look at the list of remote addresses */
1362 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1364 if (net == (TAILQ_NEXT(net, sctp_next))) {
1365 panic("Corrupt net list");
1368 if (net->ro._l_addr.sa.sa_family !=
1369 remote->sa_family) {
1370 /* not the same family */
1373 switch (remote->sa_family) {
1377 struct sockaddr_in *sin,
1380 sin = (struct sockaddr_in *)
1382 rsin = (struct sockaddr_in *)remote;
1383 if (sin->sin_addr.s_addr ==
1384 rsin->sin_addr.s_addr) {
1389 if (locked_tcb == NULL) {
1390 SCTP_INP_DECR_REF(inp);
1391 } else if (locked_tcb != stcb) {
1392 SCTP_TCB_LOCK(locked_tcb);
1395 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1398 SCTP_INP_WUNLOCK(inp);
1399 SCTP_INP_INFO_RUNLOCK();
1408 struct sockaddr_in6 *sin6,
1411 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1412 rsin6 = (struct sockaddr_in6 *)remote;
1413 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1419 if (locked_tcb == NULL) {
1420 SCTP_INP_DECR_REF(inp);
1421 } else if (locked_tcb != stcb) {
1422 SCTP_TCB_LOCK(locked_tcb);
1425 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1427 SCTP_INP_WUNLOCK(inp);
1428 SCTP_INP_INFO_RUNLOCK();
1439 SCTP_TCB_UNLOCK(stcb);
1442 SCTP_INP_WLOCK(inp);
1443 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1446 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1447 inp->sctp_hashmark)];
1448 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1449 if (stcb->rport != rport) {
1450 /* remote port does not match */
1453 SCTP_TCB_LOCK(stcb);
1454 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1455 SCTP_TCB_UNLOCK(stcb);
1458 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1459 SCTP_TCB_UNLOCK(stcb);
1462 /* now look at the list of remote addresses */
1463 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1465 if (net == (TAILQ_NEXT(net, sctp_next))) {
1466 panic("Corrupt net list");
1469 if (net->ro._l_addr.sa.sa_family !=
1470 remote->sa_family) {
1471 /* not the same family */
1474 switch (remote->sa_family) {
1478 struct sockaddr_in *sin,
1481 sin = (struct sockaddr_in *)
1483 rsin = (struct sockaddr_in *)remote;
1484 if (sin->sin_addr.s_addr ==
1485 rsin->sin_addr.s_addr) {
1490 if (locked_tcb == NULL) {
1491 SCTP_INP_DECR_REF(inp);
1492 } else if (locked_tcb != stcb) {
1493 SCTP_TCB_LOCK(locked_tcb);
1496 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1498 SCTP_INP_WUNLOCK(inp);
1499 SCTP_INP_INFO_RUNLOCK();
1508 struct sockaddr_in6 *sin6,
1511 sin6 = (struct sockaddr_in6 *)
1513 rsin6 = (struct sockaddr_in6 *)remote;
1514 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1520 if (locked_tcb == NULL) {
1521 SCTP_INP_DECR_REF(inp);
1522 } else if (locked_tcb != stcb) {
1523 SCTP_TCB_LOCK(locked_tcb);
1526 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1528 SCTP_INP_WUNLOCK(inp);
1529 SCTP_INP_INFO_RUNLOCK();
1540 SCTP_TCB_UNLOCK(stcb);
1544 /* clean up for returning null */
1546 SCTP_TCB_LOCK(locked_tcb);
1547 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1549 SCTP_INP_WUNLOCK(inp);
1550 SCTP_INP_INFO_RUNLOCK();
1557 * Find an association for a specific endpoint using the association id given
1558 * out in the COMM_UP notification
1561 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1564 * Use my the assoc_id to find a endpoint
1566 struct sctpasochead *head;
1567 struct sctp_tcb *stcb;
1571 SCTP_PRINTF("TSNH ep_associd\n");
1574 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1575 SCTP_PRINTF("TSNH ep_associd0\n");
1578 id = (uint32_t)asoc_id;
1579 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1581 /* invalid id TSNH */
1582 SCTP_PRINTF("TSNH ep_associd1\n");
1585 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1586 if (stcb->asoc.assoc_id == id) {
1587 if (inp != stcb->sctp_ep) {
1589 * some other guy has the same id active (id
1592 SCTP_PRINTF("TSNH ep_associd2\n");
1595 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1599 SCTP_TCB_LOCK(stcb);
1609 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1611 struct sctp_tcb *stcb;
1613 SCTP_INP_RLOCK(inp);
1614 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1615 SCTP_INP_RUNLOCK(inp);
1621 * Endpoint probe expects that the INP_INFO is locked.
1623 static struct sctp_inpcb *
1624 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1625 uint16_t lport, uint32_t vrf_id)
1627 struct sctp_inpcb *inp;
1628 struct sctp_laddr *laddr;
1630 struct sockaddr_in *sin;
1633 struct sockaddr_in6 *sin6;
1634 struct sockaddr_in6 *intf_addr6;
1644 switch (nam->sa_family) {
1647 sin = (struct sockaddr_in *)nam;
1652 sin6 = (struct sockaddr_in6 *)nam;
1656 /* unsupported family */
1663 LIST_FOREACH(inp, head, sctp_hash) {
1664 SCTP_INP_RLOCK(inp);
1665 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1666 SCTP_INP_RUNLOCK(inp);
1669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1670 (inp->sctp_lport == lport)) {
1672 switch (nam->sa_family) {
1675 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1676 SCTP_IPV6_V6ONLY(inp)) {
1678 * IPv4 on a IPv6 socket with ONLY
1681 SCTP_INP_RUNLOCK(inp);
1684 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1685 &sin->sin_addr) != 0) {
1686 SCTP_INP_RUNLOCK(inp);
1694 * A V6 address and the endpoint is NOT
1697 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1698 SCTP_INP_RUNLOCK(inp);
1701 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1702 &sin6->sin6_addr) != 0) {
1703 SCTP_INP_RUNLOCK(inp);
1711 /* does a VRF id match? */
1713 if (inp->def_vrf_id == vrf_id)
1716 SCTP_INP_RUNLOCK(inp);
1721 SCTP_INP_RUNLOCK(inp);
1723 switch (nam->sa_family) {
1726 if (sin->sin_addr.s_addr == INADDR_ANY) {
1727 /* Can't hunt for one that has no address specified */
1734 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1735 /* Can't hunt for one that has no address specified */
1744 * ok, not bound to all so see if we can find a EP bound to this
1747 LIST_FOREACH(inp, head, sctp_hash) {
1748 SCTP_INP_RLOCK(inp);
1749 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1750 SCTP_INP_RUNLOCK(inp);
1753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1754 SCTP_INP_RUNLOCK(inp);
1758 * Ok this could be a likely candidate, look at all of its
1761 if (inp->sctp_lport != lport) {
1762 SCTP_INP_RUNLOCK(inp);
1765 /* does a VRF id match? */
1767 if (inp->def_vrf_id == vrf_id)
1771 SCTP_INP_RUNLOCK(inp);
1774 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1775 if (laddr->ifa == NULL) {
1776 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1780 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1781 (void *)laddr->ifa);
1782 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1783 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1786 if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1787 /* possible, see if it matches */
1788 switch (nam->sa_family) {
1791 if (sin->sin_addr.s_addr ==
1792 laddr->ifa->address.sin.sin_addr.s_addr) {
1793 SCTP_INP_RUNLOCK(inp);
1800 intf_addr6 = &laddr->ifa->address.sin6;
1801 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1803 SCTP_INP_RUNLOCK(inp);
1811 SCTP_INP_RUNLOCK(inp);
1817 static struct sctp_inpcb *
1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1820 struct sctppcbhead *head;
1821 struct sctp_inpcb *t_inp;
1824 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1825 SCTP_BASE_INFO(hashmark))];
1826 LIST_FOREACH(t_inp, head, sctp_hash) {
1827 if (t_inp->sctp_lport != lport) {
1830 /* is it in the VRF in question */
1832 if (t_inp->def_vrf_id == vrf_id)
1837 /* This one is in use. */
1838 /* check the v6/v4 binding issue */
1839 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1840 SCTP_IPV6_V6ONLY(t_inp)) {
1841 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1842 /* collision in V6 space */
1845 /* inp is BOUND_V4 no conflict */
1848 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1849 /* t_inp is bound v4 and v6, conflict always */
1852 /* t_inp is bound only V4 */
1853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1854 SCTP_IPV6_V6ONLY(inp)) {
1858 /* else fall through to conflict */
1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1869 /* For 1-2-1 with port reuse */
1870 struct sctppcbhead *head;
1871 struct sctp_inpcb *tinp, *ninp;
1873 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1874 /* only works with port reuse on */
1877 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1880 SCTP_INP_RUNLOCK(inp);
1881 SCTP_INP_INFO_WLOCK();
1882 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1883 SCTP_BASE_INFO(hashmark))];
1884 /* Kick out all non-listeners to the TCP hash */
1885 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1886 if (tinp->sctp_lport != inp->sctp_lport) {
1889 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1892 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1895 if (SCTP_IS_LISTENING(tinp)) {
1898 SCTP_INP_WLOCK(tinp);
1899 LIST_REMOVE(tinp, sctp_hash);
1900 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1901 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1902 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1903 SCTP_INP_WUNLOCK(tinp);
1905 SCTP_INP_WLOCK(inp);
1906 /* Pull from where he was */
1907 LIST_REMOVE(inp, sctp_hash);
1908 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1909 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1910 LIST_INSERT_HEAD(head, inp, sctp_hash);
1911 SCTP_INP_WUNLOCK(inp);
1912 SCTP_INP_RLOCK(inp);
1913 SCTP_INP_INFO_WUNLOCK();
1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1923 * First we check the hash table to see if someone has this port
1924 * bound with just the port.
1926 struct sctp_inpcb *inp;
1927 struct sctppcbhead *head;
1931 struct sockaddr_in *sin;
1934 struct sockaddr_in6 *sin6;
1937 switch (nam->sa_family) {
1940 sin = (struct sockaddr_in *)nam;
1941 lport = sin->sin_port;
1946 sin6 = (struct sockaddr_in6 *)nam;
1947 lport = sin6->sin6_port;
1954 * I could cheat here and just cast to one of the types but we will
1955 * do it right. It also provides the check against an Unsupported
1958 /* Find the head of the ALLADDR chain */
1959 if (have_lock == 0) {
1960 SCTP_INP_INFO_RLOCK();
1962 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1963 SCTP_BASE_INFO(hashmark))];
1964 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1967 * If the TCP model exists it could be that the main listening
1968 * endpoint is gone but there still exists a connected socket for
1969 * this guy. If so we can return the first one that we find. This
1970 * may NOT be the correct one so the caller should be wary on the
1971 * returned INP. Currently the only caller that sets find_tcp_pool
1972 * is in bindx where we are verifying that a user CAN bind the
1973 * address. He either has bound it already, or someone else has, or
1974 * its open to bind, so this is good enough.
1976 if (inp == NULL && find_tcp_pool) {
1977 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1978 head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1979 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1986 SCTP_INP_INCR_REF(inp);
1988 if (have_lock == 0) {
1989 SCTP_INP_INFO_RUNLOCK();
1996 * Find an association for an endpoint with the pointer to whom you want to
1997 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1998 * need to change the *to to some other struct like a mbuf...
2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2002 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2005 struct sctp_inpcb *inp = NULL;
2006 struct sctp_tcb *stcb;
2008 SCTP_INP_INFO_RLOCK();
2009 if (find_tcp_pool) {
2010 if (inp_p != NULL) {
2011 stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2014 stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2018 SCTP_INP_INFO_RUNLOCK();
2022 inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2023 if (inp_p != NULL) {
2026 SCTP_INP_INFO_RUNLOCK();
2031 * ok, we have an endpoint, now lets find the assoc for it (if any)
2032 * we now place the source address or from in the to of the find
2033 * endpoint call. Since in reality this chain is used from the
2034 * inbound packet side.
2036 if (inp_p != NULL) {
2037 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2040 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2048 * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2049 * find all addresses that the sender has specified in any address list. Each
2050 * address will be used to lookup the TCB and see if one exits.
2052 static struct sctp_tcb *
2053 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2054 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2055 struct sockaddr *dst)
2057 struct sctp_paramhdr *phdr, param_buf;
2058 #if defined(INET) || defined(INET6)
2059 struct sctp_tcb *stcb;
2064 struct sockaddr_in sin4;
2067 struct sockaddr_in6 sin6;
2071 memset(&sin4, 0, sizeof(sin4));
2072 sin4.sin_len = sizeof(sin4);
2073 sin4.sin_family = AF_INET;
2074 sin4.sin_port = sh->src_port;
2077 memset(&sin6, 0, sizeof(sin6));
2078 sin6.sin6_len = sizeof(sin6);
2079 sin6.sin6_family = AF_INET6;
2080 sin6.sin6_port = sh->src_port;
2083 offset += sizeof(struct sctp_init_chunk);
2085 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
2086 while (phdr != NULL) {
2087 /* now we must see if we want the parameter */
2088 #if defined(INET) || defined(INET6)
2089 ptype = ntohs(phdr->param_type);
2091 plen = ntohs(phdr->param_length);
2096 if (ptype == SCTP_IPV4_ADDRESS &&
2097 plen == sizeof(struct sctp_ipv4addr_param)) {
2098 /* Get the rest of the address */
2099 struct sctp_ipv4addr_param ip4_param, *p4;
2101 phdr = sctp_get_next_param(m, offset,
2102 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2106 p4 = (struct sctp_ipv4addr_param *)phdr;
2107 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2109 stcb = sctp_findassociation_ep_addr(inp_p,
2110 (struct sockaddr *)&sin4, netp, dst, NULL);
2117 if (ptype == SCTP_IPV6_ADDRESS &&
2118 plen == sizeof(struct sctp_ipv6addr_param)) {
2119 /* Get the rest of the address */
2120 struct sctp_ipv6addr_param ip6_param, *p6;
2122 phdr = sctp_get_next_param(m, offset,
2123 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2127 p6 = (struct sctp_ipv6addr_param *)phdr;
2128 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2130 stcb = sctp_findassociation_ep_addr(inp_p,
2131 (struct sockaddr *)&sin6, netp, dst, NULL);
2137 offset += SCTP_SIZE32(plen);
2138 phdr = sctp_get_next_param(m, offset, ¶m_buf,
2144 static struct sctp_tcb *
2145 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2146 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2147 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2150 * Use my vtag to hash. If we find it we then verify the source addr
2151 * is in the assoc. If all goes well we save a bit on rec of a
2154 struct sctpasochead *head;
2155 struct sctp_nets *net;
2156 struct sctp_tcb *stcb;
2158 SCTP_INP_INFO_RLOCK();
2159 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2160 SCTP_BASE_INFO(hashasocmark))];
2161 LIST_FOREACH(stcb, head, sctp_asocs) {
2162 SCTP_INP_RLOCK(stcb->sctp_ep);
2163 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2164 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2167 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2168 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2171 SCTP_TCB_LOCK(stcb);
2172 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2173 if (stcb->asoc.my_vtag == vtag) {
2175 if (stcb->rport != rport) {
2176 SCTP_TCB_UNLOCK(stcb);
2179 if (stcb->sctp_ep->sctp_lport != lport) {
2180 SCTP_TCB_UNLOCK(stcb);
2183 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2184 SCTP_TCB_UNLOCK(stcb);
2187 /* RRS:Need toaddr check here */
2188 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2189 /* Endpoint does not own this address */
2190 SCTP_TCB_UNLOCK(stcb);
2195 * If we have both vtags that's all we match
2198 if (stcb->asoc.peer_vtag == remote_tag) {
2200 * If both tags match we consider it
2201 * conclusive and check NO
2202 * source/destination addresses
2207 if (skip_src_check) {
2210 *netp = sctp_findnet(stcb, from);
2212 *netp = NULL; /* unknown */
2215 *inp_p = stcb->sctp_ep;
2216 SCTP_INP_INFO_RUNLOCK();
2219 net = sctp_findnet(stcb, from);
2223 SCTP_STAT_INCR(sctps_vtagexpress);
2224 *inp_p = stcb->sctp_ep;
2225 SCTP_INP_INFO_RUNLOCK();
2229 * not him, this should only happen in rare
2230 * cases so I peg it.
2232 SCTP_STAT_INCR(sctps_vtagbogus);
2235 SCTP_TCB_UNLOCK(stcb);
2237 SCTP_INP_INFO_RUNLOCK();
2243 * Find an association with the pointer to the inbound IP packet. This can be
2244 * a IPv4 or IPv6 packet.
2247 sctp_findassociation_addr(struct mbuf *m, int offset,
2248 struct sockaddr *src, struct sockaddr *dst,
2249 struct sctphdr *sh, struct sctp_chunkhdr *ch,
2250 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2252 struct sctp_tcb *stcb;
2253 struct sctp_inpcb *inp;
2256 /* we only go down this path if vtag is non-zero */
2257 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2258 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2265 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2269 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2272 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2273 if (stcb == NULL && inp) {
2274 /* Found a EP but not this address */
2275 if ((ch->chunk_type == SCTP_INITIATION) ||
2276 (ch->chunk_type == SCTP_INITIATION_ACK)) {
2278 * special hook, we do NOT return linp or an
2279 * association that is linked to an existing
2280 * association that is under the TCP pool (i.e. no
2281 * listener exists). The endpoint finding routine
2282 * will always find a listener before examining the
2285 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2291 stcb = sctp_findassociation_special_addr(m,
2292 offset, sh, &inp, netp, dst);
2293 if (inp_p != NULL) {
2298 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2303 * lookup an association by an ASCONF lookup address.
2304 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2307 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2308 struct sockaddr *dst, struct sctphdr *sh,
2309 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2311 struct sctp_tcb *stcb;
2312 union sctp_sockstore remote_store;
2313 struct sctp_paramhdr param_buf, *phdr;
2315 int zero_address = 0;
2317 struct sockaddr_in *sin;
2320 struct sockaddr_in6 *sin6;
2323 memset(&remote_store, 0, sizeof(remote_store));
2324 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2325 ¶m_buf, sizeof(struct sctp_paramhdr));
2327 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2331 ptype = (int)((uint32_t)ntohs(phdr->param_type));
2332 /* get the correlation address */
2335 case SCTP_IPV6_ADDRESS:
2337 /* ipv6 address param */
2338 struct sctp_ipv6addr_param *p6, p6_buf;
2340 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2343 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2344 offset + sizeof(struct sctp_asconf_chunk),
2345 &p6_buf.ph, sizeof(p6_buf));
2347 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2351 sin6 = &remote_store.sin6;
2352 sin6->sin6_family = AF_INET6;
2353 sin6->sin6_len = sizeof(*sin6);
2354 sin6->sin6_port = sh->src_port;
2355 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2356 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2362 case SCTP_IPV4_ADDRESS:
2364 /* ipv4 address param */
2365 struct sctp_ipv4addr_param *p4, p4_buf;
2367 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2370 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2371 offset + sizeof(struct sctp_asconf_chunk),
2372 &p4_buf.ph, sizeof(p4_buf));
2374 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2378 sin = &remote_store.sin;
2379 sin->sin_family = AF_INET;
2380 sin->sin_len = sizeof(*sin);
2381 sin->sin_port = sh->src_port;
2382 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2383 if (sin->sin_addr.s_addr == INADDR_ANY)
2389 /* invalid address param type */
2394 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2395 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2397 SCTP_INP_DECR_REF(*inp_p);
2400 stcb = sctp_findassociation_ep_addr(inp_p,
2401 &remote_store.sa, netp,
2409 * allocate a sctp_inpcb and setup a temporary binding to a port/all
2410 * addresses. This way if we don't get a bind we by default pick a ephemeral
2411 * port with all addresses bound.
2414 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2417 * we get called when a new endpoint starts up. We need to allocate
2418 * the sctp_inpcb structure from the zone and init it. Mark it as
2419 * unbound and find a port that we can use as an ephemeral with
2420 * INADDR_ANY. If the user binds later no problem we can then add in
2421 * the specific addresses. And setup the default parameters for the
2425 struct sctp_inpcb *inp;
2427 struct timeval time;
2428 sctp_sharedkey_t *null_key;
2432 SCTP_INP_INFO_WLOCK();
2433 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2435 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2436 SCTP_INP_INFO_WUNLOCK();
2437 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2441 memset(inp, 0, sizeof(*inp));
2443 /* bump generations */
2444 /* setup socket pointers */
2445 inp->sctp_socket = so;
2446 inp->ip_inp.inp.inp_socket = so;
2447 inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2449 if (INP_SOCKAF(so) == AF_INET6) {
2450 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2451 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2453 if (MODULE_GLOBAL(ip6_v6only)) {
2454 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2458 inp->sctp_associd_counter = 1;
2459 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2460 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2462 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2463 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2464 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2465 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2466 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2467 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2468 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2469 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2470 inp->idata_supported = 0;
2472 inp->fibnum = so->so_fibnum;
2473 /* init the small hash table we use to track asocid <-> tcb */
2474 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2475 if (inp->sctp_asocidhash == NULL) {
2476 crfree(inp->ip_inp.inp.inp_cred);
2477 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2478 SCTP_INP_INFO_WUNLOCK();
2481 SCTP_INCR_EP_COUNT();
2482 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2483 SCTP_INP_INFO_WUNLOCK();
2485 so->so_pcb = (caddr_t)inp;
2487 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2488 /* UDP style socket */
2489 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2490 SCTP_PCB_FLAGS_UNBOUND);
2491 /* Be sure it is NON-BLOCKING IO for UDP */
2492 /* SCTP_SET_SO_NBIO(so); */
2493 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2494 /* TCP style socket */
2495 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2496 SCTP_PCB_FLAGS_UNBOUND);
2497 /* Be sure we have blocking IO by default */
2499 SCTP_CLEAR_SO_NBIO(so);
2503 * unsupported socket type (RAW, etc)- in case we missed it
2506 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2508 crfree(inp->ip_inp.inp.inp_cred);
2509 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2510 return (EOPNOTSUPP);
2512 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2513 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2514 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2515 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2516 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2517 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2518 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2519 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2520 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2522 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2523 &inp->sctp_hashmark);
2524 if (inp->sctp_tcbhash == NULL) {
2525 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2528 crfree(inp->ip_inp.inp.inp_cred);
2529 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2532 inp->def_vrf_id = vrf_id;
2534 SCTP_INP_INFO_WLOCK();
2535 SCTP_INP_LOCK_INIT(inp);
2536 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2537 SCTP_INP_READ_INIT(inp);
2538 SCTP_ASOC_CREATE_LOCK_INIT(inp);
2539 /* lock the new ep */
2540 SCTP_INP_WLOCK(inp);
2542 /* add it to the info area */
2543 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2544 SCTP_INP_INFO_WUNLOCK();
2546 TAILQ_INIT(&inp->read_queue);
2547 LIST_INIT(&inp->sctp_addr_list);
2549 LIST_INIT(&inp->sctp_asoc_list);
2551 #ifdef SCTP_TRACK_FREED_ASOCS
2553 LIST_INIT(&inp->sctp_asoc_free_list);
2555 /* Init the timer structure for signature change */
2556 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2557 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2559 /* now init the actual endpoint default data */
2562 /* setup the base timeout information */
2563 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */
2564 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */
2565 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2566 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2567 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2568 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2569 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2570 /* all max/min max are in ms */
2571 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2572 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2573 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2574 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2575 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2576 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2577 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2578 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2579 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2580 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2581 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2582 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2583 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2585 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2586 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2587 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2588 /* number of streams to pre-open on a association */
2589 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2592 /* Add adaptation cookie */
2593 m->adaptation_layer_indicator = 0;
2594 m->adaptation_layer_indicator_provided = 0;
2596 /* seed random number generator */
2597 m->random_counter = 1;
2598 m->store_at = SCTP_SIGNATURE_SIZE;
2599 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2600 sctp_fill_random_store(m);
2602 /* Minimum cookie size */
2603 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2604 sizeof(struct sctp_state_cookie);
2605 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2607 /* Setup the initial secret */
2608 (void)SCTP_GETTIME_TIMEVAL(&time);
2609 m->time_of_secret_change = time.tv_sec;
2611 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2612 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2614 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2616 /* How long is a cookie good for ? */
2617 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2619 * Initialize authentication parameters
2621 m->local_hmacs = sctp_default_supported_hmaclist();
2622 m->local_auth_chunks = sctp_alloc_chunklist();
2623 if (inp->asconf_supported) {
2624 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2625 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2627 m->default_dscp = 0;
2629 m->default_flowlabel = 0;
2631 m->port = 0; /* encapsulation disabled by default */
2632 LIST_INIT(&m->shared_keys);
2633 /* add default NULL key as key id 0 */
2634 null_key = sctp_alloc_sharedkey();
2635 sctp_insert_sharedkey(&m->shared_keys, null_key);
2636 SCTP_INP_WUNLOCK(inp);
2637 #ifdef SCTP_LOG_CLOSING
2638 sctp_log_closing(inp, NULL, 12);
2645 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2646 struct sctp_tcb *stcb)
2648 struct sctp_nets *net;
2649 uint16_t lport, rport;
2650 struct sctppcbhead *head;
2651 struct sctp_laddr *laddr, *oladdr;
2653 atomic_add_int(&stcb->asoc.refcnt, 1);
2654 SCTP_TCB_UNLOCK(stcb);
2655 SCTP_INP_INFO_WLOCK();
2656 SCTP_INP_WLOCK(old_inp);
2657 SCTP_INP_WLOCK(new_inp);
2658 SCTP_TCB_LOCK(stcb);
2659 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2661 new_inp->sctp_ep.time_of_secret_change =
2662 old_inp->sctp_ep.time_of_secret_change;
2663 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2664 sizeof(old_inp->sctp_ep.secret_key));
2665 new_inp->sctp_ep.current_secret_number =
2666 old_inp->sctp_ep.current_secret_number;
2667 new_inp->sctp_ep.last_secret_number =
2668 old_inp->sctp_ep.last_secret_number;
2669 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2671 /* make it so new data pours into the new socket */
2672 stcb->sctp_socket = new_inp->sctp_socket;
2673 stcb->sctp_ep = new_inp;
2675 /* Copy the port across */
2676 lport = new_inp->sctp_lport = old_inp->sctp_lport;
2677 rport = stcb->rport;
2678 /* Pull the tcb from the old association */
2679 LIST_REMOVE(stcb, sctp_tcbhash);
2680 LIST_REMOVE(stcb, sctp_tcblist);
2681 if (stcb->asoc.in_asocid_hash) {
2682 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2684 /* Now insert the new_inp into the TCP connected hash */
2685 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2687 LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2688 /* Its safe to access */
2689 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2691 /* Now move the tcb into the endpoint list */
2692 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2694 * Question, do we even need to worry about the ep-hash since we
2695 * only have one connection? Probably not :> so lets get rid of it
2696 * and not suck up any kernel memory in that.
2698 if (stcb->asoc.in_asocid_hash) {
2699 struct sctpasochead *lhd;
2701 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2702 new_inp->hashasocidmark)];
2703 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2705 /* Ok. Let's restart timer. */
2706 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2707 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2711 SCTP_INP_INFO_WUNLOCK();
2712 if (new_inp->sctp_tcbhash != NULL) {
2713 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2714 new_inp->sctp_tcbhash = NULL;
2716 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2717 /* Subset bound, so copy in the laddr list from the old_inp */
2718 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2719 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2720 if (laddr == NULL) {
2722 * Gak, what can we do? This assoc is really
2723 * HOSED. We probably should send an abort
2726 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2729 SCTP_INCR_LADDR_COUNT();
2730 memset(laddr, 0, sizeof(*laddr));
2731 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2732 laddr->ifa = oladdr->ifa;
2733 atomic_add_int(&laddr->ifa->refcount, 1);
2734 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2736 new_inp->laddr_count++;
2737 if (oladdr == stcb->asoc.last_used_address) {
2738 stcb->asoc.last_used_address = laddr;
2742 /* Now any running timers need to be adjusted. */
2743 if (stcb->asoc.dack_timer.ep == old_inp) {
2744 SCTP_INP_DECR_REF(old_inp);
2745 stcb->asoc.dack_timer.ep = new_inp;
2746 SCTP_INP_INCR_REF(new_inp);
2748 if (stcb->asoc.asconf_timer.ep == old_inp) {
2749 SCTP_INP_DECR_REF(old_inp);
2750 stcb->asoc.asconf_timer.ep = new_inp;
2751 SCTP_INP_INCR_REF(new_inp);
2753 if (stcb->asoc.strreset_timer.ep == old_inp) {
2754 SCTP_INP_DECR_REF(old_inp);
2755 stcb->asoc.strreset_timer.ep = new_inp;
2756 SCTP_INP_INCR_REF(new_inp);
2758 if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2759 SCTP_INP_DECR_REF(old_inp);
2760 stcb->asoc.shut_guard_timer.ep = new_inp;
2761 SCTP_INP_INCR_REF(new_inp);
2763 if (stcb->asoc.autoclose_timer.ep == old_inp) {
2764 SCTP_INP_DECR_REF(old_inp);
2765 stcb->asoc.autoclose_timer.ep = new_inp;
2766 SCTP_INP_INCR_REF(new_inp);
2768 if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2769 SCTP_INP_DECR_REF(old_inp);
2770 stcb->asoc.delete_prim_timer.ep = new_inp;
2771 SCTP_INP_INCR_REF(new_inp);
2773 /* now what about the nets? */
2774 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2775 if (net->pmtu_timer.ep == old_inp) {
2776 SCTP_INP_DECR_REF(old_inp);
2777 net->pmtu_timer.ep = new_inp;
2778 SCTP_INP_INCR_REF(new_inp);
2780 if (net->hb_timer.ep == old_inp) {
2781 SCTP_INP_DECR_REF(old_inp);
2782 net->hb_timer.ep = new_inp;
2783 SCTP_INP_INCR_REF(new_inp);
2785 if (net->rxt_timer.ep == old_inp) {
2786 SCTP_INP_DECR_REF(old_inp);
2787 net->rxt_timer.ep = new_inp;
2788 SCTP_INP_INCR_REF(new_inp);
2791 SCTP_INP_WUNLOCK(new_inp);
2792 SCTP_INP_WUNLOCK(old_inp);
2796 * insert an laddr entry with the given ifa for the desired list
2799 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2801 struct sctp_laddr *laddr;
2803 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2804 if (laddr == NULL) {
2805 /* out of memory? */
2806 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2809 SCTP_INCR_LADDR_COUNT();
2810 memset(laddr, 0, sizeof(*laddr));
2811 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2813 laddr->action = act;
2814 atomic_add_int(&ifa->refcount, 1);
2816 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2822 * Remove an laddr entry from the local address list (on an assoc)
2825 sctp_remove_laddr(struct sctp_laddr *laddr)
2828 /* remove from the list */
2829 LIST_REMOVE(laddr, sctp_nxt_addr);
2830 sctp_free_ifa(laddr->ifa);
2831 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2832 SCTP_DECR_LADDR_COUNT();
2837 /* sctp_ifap is used to bypass normal local address validation checks */
2839 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2840 struct sctp_ifa *sctp_ifap, struct thread *p)
2842 /* bind a ep to a socket address */
2843 struct sctppcbhead *head;
2844 struct sctp_inpcb *inp, *inp_tmp;
2845 struct inpcb *ip_inp;
2846 int port_reuse_active = 0;
2854 inp = (struct sctp_inpcb *)so->so_pcb;
2855 ip_inp = (struct inpcb *)so->so_pcb;
2858 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2859 ntohs(((struct sockaddr_in *)addr)->sin_port));
2860 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2861 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2864 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2865 /* already did a bind, subsequent binds NOT allowed ! */
2866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2871 panic("null proc/thread");
2874 switch (addr->sa_family) {
2878 struct sockaddr_in *sin;
2880 /* IPV6_V6ONLY socket? */
2881 if (SCTP_IPV6_V6ONLY(inp)) {
2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2885 if (addr->sa_len != sizeof(*sin)) {
2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2890 sin = (struct sockaddr_in *)addr;
2891 lport = sin->sin_port;
2893 * For LOOPBACK the prison_local_ip4() call
2894 * will transmute the ip address to the
2897 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2898 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2901 if (sin->sin_addr.s_addr != INADDR_ANY) {
2911 * Only for pure IPv6 Address. (No IPv4
2914 struct sockaddr_in6 *sin6;
2916 sin6 = (struct sockaddr_in6 *)addr;
2918 if (addr->sa_len != sizeof(*sin6)) {
2919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2922 lport = sin6->sin6_port;
2924 * For LOOPBACK the prison_local_ip6() call
2925 * will transmute the ipv6 address to the
2928 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2929 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2930 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2933 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2935 /* KAME hack: embed scopeid */
2936 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2937 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2941 /* this must be cleared for ifa_ifwithaddr() */
2942 sin6->sin6_scope_id = 0;
2947 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2948 return (EAFNOSUPPORT);
2951 SCTP_INP_INFO_WLOCK();
2952 SCTP_INP_WLOCK(inp);
2953 /* Setup a vrf_id to be the default for the non-bind-all case. */
2954 vrf_id = inp->def_vrf_id;
2956 /* increase our count due to the unlock we do */
2957 SCTP_INP_INCR_REF(inp);
2960 * Did the caller specify a port? if so we must see if an ep
2961 * already has this one bound.
2963 /* got to be root to get at low ports */
2964 if (ntohs(lport) < IPPORT_RESERVED) {
2965 if ((p != NULL) && ((error =
2966 priv_check(p, PRIV_NETINET_RESERVEDPORT)
2968 SCTP_INP_DECR_REF(inp);
2969 SCTP_INP_WUNLOCK(inp);
2970 SCTP_INP_INFO_WUNLOCK();
2974 SCTP_INP_WUNLOCK(inp);
2976 vrf_id = inp->def_vrf_id;
2977 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2978 if (inp_tmp != NULL) {
2980 * lock guy returned and lower count note
2981 * that we are not bound so inp_tmp should
2982 * NEVER be inp. And it is this inp
2983 * (inp_tmp) that gets the reference bump,
2984 * so we must lower it.
2986 SCTP_INP_DECR_REF(inp_tmp);
2988 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2989 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2991 * Ok, must be one-2-one and
2992 * allowing port re-use
2994 port_reuse_active = 1;
2995 goto continue_anyway;
2997 SCTP_INP_DECR_REF(inp);
2998 SCTP_INP_INFO_WUNLOCK();
2999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3000 return (EADDRINUSE);
3003 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3004 if (inp_tmp != NULL) {
3006 * lock guy returned and lower count note
3007 * that we are not bound so inp_tmp should
3008 * NEVER be inp. And it is this inp
3009 * (inp_tmp) that gets the reference bump,
3010 * so we must lower it.
3012 SCTP_INP_DECR_REF(inp_tmp);
3014 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3015 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3017 * Ok, must be one-2-one and
3018 * allowing port re-use
3020 port_reuse_active = 1;
3021 goto continue_anyway;
3023 SCTP_INP_DECR_REF(inp);
3024 SCTP_INP_INFO_WUNLOCK();
3025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3026 return (EADDRINUSE);
3030 SCTP_INP_WLOCK(inp);
3032 /* verify that no lport is not used by a singleton */
3033 if ((port_reuse_active == 0) &&
3034 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3035 /* Sorry someone already has this one bound */
3036 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3037 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3038 port_reuse_active = 1;
3040 SCTP_INP_DECR_REF(inp);
3041 SCTP_INP_WUNLOCK(inp);
3042 SCTP_INP_INFO_WUNLOCK();
3043 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3044 return (EADDRINUSE);
3049 uint16_t first, last, candidate;
3053 if (ip_inp->inp_flags & INP_HIGHPORT) {
3054 first = MODULE_GLOBAL(ipport_hifirstauto);
3055 last = MODULE_GLOBAL(ipport_hilastauto);
3056 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3058 priv_check(p, PRIV_NETINET_RESERVEDPORT)
3060 SCTP_INP_DECR_REF(inp);
3061 SCTP_INP_WUNLOCK(inp);
3062 SCTP_INP_INFO_WUNLOCK();
3063 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3066 first = MODULE_GLOBAL(ipport_lowfirstauto);
3067 last = MODULE_GLOBAL(ipport_lowlastauto);
3069 first = MODULE_GLOBAL(ipport_firstauto);
3070 last = MODULE_GLOBAL(ipport_lastauto);
3079 count = last - first + 1; /* number of candidates */
3080 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3084 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3089 SCTP_INP_DECR_REF(inp);
3090 SCTP_INP_WUNLOCK(inp);
3091 SCTP_INP_INFO_WUNLOCK();
3092 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3093 return (EADDRINUSE);
3095 if (candidate == last)
3098 candidate = candidate + 1;
3101 lport = htons(candidate);
3103 SCTP_INP_DECR_REF(inp);
3104 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3105 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3107 * this really should not happen. The guy did a non-blocking
3108 * bind and then did a close at the same time.
3110 SCTP_INP_WUNLOCK(inp);
3111 SCTP_INP_INFO_WUNLOCK();
3112 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3115 /* ok we look clear to give out this port, so lets setup the binding */
3117 /* binding to all addresses, so just set in the proper flags */
3118 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3119 /* set the automatic addr changes from kernel flag */
3120 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3121 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3122 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3124 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3125 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3127 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3128 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3130 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3133 * set the automatic mobility_base from kernel flag (by
3136 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3137 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3138 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3140 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3141 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3144 * set the automatic mobility_fasthandoff from kernel flag
3147 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3148 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3149 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3151 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3152 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3156 * bind specific, make sure flags is off and add a new
3157 * address structure to the sctp_addr_list inside the ep
3160 * We will need to allocate one and insert it at the head.
3161 * The socketopt call can just insert new addresses in there
3162 * as well. It will also have to do the embed scope kame
3163 * hack too (before adding).
3165 struct sctp_ifa *ifa;
3166 union sctp_sockstore store;
3168 memset(&store, 0, sizeof(store));
3169 switch (addr->sa_family) {
3172 memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3173 store.sin.sin_port = 0;
3178 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3179 store.sin6.sin6_port = 0;
3186 * first find the interface with the bound address need to
3187 * zero out the port to find the address! yuck! can't do
3188 * this earlier since need port for sctp_pcb_findep()
3190 if (sctp_ifap != NULL) {
3194 * Note for BSD we hit here always other O/S's will
3195 * pass things in via the sctp_ifap argument.
3197 ifa = sctp_find_ifa_by_addr(&store.sa,
3198 vrf_id, SCTP_ADDR_NOT_LOCKED);
3201 /* Can't find an interface with that address */
3202 SCTP_INP_WUNLOCK(inp);
3203 SCTP_INP_INFO_WUNLOCK();
3204 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3205 return (EADDRNOTAVAIL);
3208 if (addr->sa_family == AF_INET6) {
3209 /* GAK, more FIXME IFA lock? */
3210 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3211 /* Can't bind a non-existent addr. */
3212 SCTP_INP_WUNLOCK(inp);
3213 SCTP_INP_INFO_WUNLOCK();
3214 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3219 /* we're not bound all */
3220 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3221 /* allow bindx() to send ASCONF's for binding changes */
3222 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3223 /* clear automatic addr changes from kernel flag */
3224 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3226 /* add this address to the endpoint list */
3227 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3229 SCTP_INP_WUNLOCK(inp);
3230 SCTP_INP_INFO_WUNLOCK();
3235 /* find the bucket */
3236 if (port_reuse_active) {
3237 /* Put it into tcp 1-2-1 hash */
3238 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3239 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3241 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3243 /* put it in the bucket */
3244 LIST_INSERT_HEAD(head, inp, sctp_hash);
3245 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3246 (void *)head, ntohs(lport), port_reuse_active);
3247 /* set in the port */
3248 inp->sctp_lport = lport;
3250 /* turn off just the unbound flag */
3251 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3252 SCTP_INP_WUNLOCK(inp);
3253 SCTP_INP_INFO_WUNLOCK();
3259 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3261 struct sctp_iterator *it, *nit;
3264 * We enter with the only the ITERATOR_LOCK in place and a write
3265 * lock on the inp_info stuff.
3267 it = sctp_it_ctl.cur_it;
3268 if (it && (it->vn != curvnet)) {
3269 /* Its not looking at our VNET */
3272 if (it && (it->inp == inp)) {
3274 * This is tricky and we hold the iterator lock, but when it
3275 * returns and gets the lock (when we release it) the
3276 * iterator will try to operate on inp. We need to stop that
3277 * from happening. But of course the iterator has a
3278 * reference on the stcb and inp. We can mark it and it will
3281 * If its a single iterator situation, we set the end
3282 * iterator flag. Otherwise we set the iterator to go to the
3286 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3287 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3289 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3293 * Now go through and remove any single reference to our inp that
3294 * may be still pending on the list
3296 SCTP_IPI_ITERATOR_WQ_LOCK();
3297 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3298 if (it->vn != curvnet) {
3301 if (it->inp == inp) {
3302 /* This one points to me is it inp specific? */
3303 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3304 /* Remove and free this one */
3305 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3307 if (it->function_atend != NULL) {
3308 (*it->function_atend) (it->pointer, it->val);
3310 SCTP_FREE(it, SCTP_M_ITER);
3312 it->inp = LIST_NEXT(it->inp, sctp_list);
3314 SCTP_INP_INCR_REF(it->inp);
3318 * When its put in the refcnt is incremented so decr
3321 SCTP_INP_DECR_REF(inp);
3324 SCTP_IPI_ITERATOR_WQ_UNLOCK();
3327 /* release sctp_inpcb unbind the port */
3329 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3332 * Here we free a endpoint. We must find it (if it is in the Hash
3333 * table) and remove it from there. Then we must also find it in the
3334 * overall list and remove it from there. After all removals are
3335 * complete then any timer has to be stopped. Then start the actual
3336 * freeing. a) Any local lists. b) Any associations. c) The hash of
3337 * all associations. d) finally the ep itself.
3339 struct sctp_tcb *asoc, *nasoc;
3340 struct sctp_laddr *laddr, *nladdr;
3341 struct inpcb *ip_pcb;
3343 int being_refed = 0;
3344 struct sctp_queued_to_read *sq, *nsq;
3346 sctp_sharedkey_t *shared_key, *nshared_key;
3349 #ifdef SCTP_LOG_CLOSING
3350 sctp_log_closing(inp, NULL, 0);
3352 SCTP_ITERATOR_LOCK();
3353 /* mark any iterators on the list or being processed */
3354 sctp_iterator_inp_being_freed(inp);
3355 SCTP_ITERATOR_UNLOCK();
3356 so = inp->sctp_socket;
3357 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3358 /* been here before.. eeks.. get out of here */
3359 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3360 #ifdef SCTP_LOG_CLOSING
3361 sctp_log_closing(inp, NULL, 1);
3365 SCTP_ASOC_CREATE_LOCK(inp);
3366 SCTP_INP_INFO_WLOCK();
3368 SCTP_INP_WLOCK(inp);
3369 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3370 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3371 /* socket is gone, so no more wakeups allowed */
3372 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3373 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3374 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3377 /* First time through we have the socket lock, after that no more. */
3378 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3379 SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3382 sctp_m_freem(inp->control);
3383 inp->control = NULL;
3386 sctp_m_freem(inp->pkt);
3389 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
3390 * here but I will be nice :> (i.e.
3392 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3396 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3397 SCTP_TCB_LOCK(asoc);
3398 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3399 /* Skip guys being freed */
3401 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3403 * Special case - we did not start a
3404 * kill timer on the asoc due to it
3405 * was not closed. So go ahead and
3408 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3409 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3411 SCTP_TCB_UNLOCK(asoc);
3414 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3415 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3416 (asoc->asoc.total_output_queue_size == 0)) {
3418 * If we have data in queue, we don't want
3419 * to just free since the app may have done,
3420 * send()/close or connect/send/close. And
3421 * it wants the data to get across first.
3423 /* Just abandon things in the front states */
3424 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3425 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3430 /* Disconnect the socket please */
3431 asoc->sctp_socket = NULL;
3432 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3433 if ((asoc->asoc.size_on_reasm_queue > 0) ||
3434 (asoc->asoc.control_pdapi) ||
3435 (asoc->asoc.size_on_all_streams > 0) ||
3436 (so && (so->so_rcv.sb_cc > 0))) {
3437 /* Left with Data unread */
3438 struct mbuf *op_err;
3440 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3441 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3442 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3443 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3444 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3445 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3446 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3448 if (sctp_free_assoc(inp, asoc,
3449 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3453 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3454 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3455 (asoc->asoc.stream_queue_cnt == 0)) {
3456 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3459 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3460 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3461 struct sctp_nets *netp;
3464 * there is nothing queued to send,
3465 * so I send shutdown
3467 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3468 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3469 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3471 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3472 sctp_stop_timers_for_shutdown(asoc);
3473 if (asoc->asoc.alternate) {
3474 netp = asoc->asoc.alternate;
3476 netp = asoc->asoc.primary_destination;
3478 sctp_send_shutdown(asoc, netp);
3479 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3481 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3482 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3485 /* mark into shutdown pending */
3486 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3487 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3488 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3489 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3491 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3492 TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3493 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3494 struct mbuf *op_err;
3497 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3498 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3499 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3500 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3501 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3502 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3503 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3505 if (sctp_free_assoc(inp, asoc,
3506 SCTP_PCBFREE_NOFORCE,
3507 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3512 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3516 SCTP_TCB_UNLOCK(asoc);
3518 /* now is there some left in our SHUTDOWN state? */
3520 #ifdef SCTP_LOG_CLOSING
3521 sctp_log_closing(inp, NULL, 2);
3523 inp->sctp_socket = NULL;
3524 SCTP_INP_WUNLOCK(inp);
3525 SCTP_ASOC_CREATE_UNLOCK(inp);
3526 SCTP_INP_INFO_WUNLOCK();
3530 inp->sctp_socket = NULL;
3531 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3532 SCTP_PCB_FLAGS_UNBOUND) {
3534 * ok, this guy has been bound. It's port is somewhere in
3535 * the SCTP_BASE_INFO(hash table). Remove it!
3537 LIST_REMOVE(inp, sctp_hash);
3538 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3542 * If there is a timer running to kill us, forget it, since it may
3543 * have a contest on the INP lock.. which would cause us to die ...
3546 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3547 SCTP_TCB_LOCK(asoc);
3548 if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3549 /* Disconnect the socket please */
3550 asoc->sctp_socket = NULL;
3551 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3553 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3554 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3555 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3556 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3559 SCTP_TCB_UNLOCK(asoc);
3562 /* Free associations that are NOT killing us */
3563 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3564 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3565 struct mbuf *op_err;
3567 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3568 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3569 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3570 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3571 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3573 SCTP_TCB_UNLOCK(asoc);
3576 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3577 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3578 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3580 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3581 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3586 /* Ok we have someone out there that will kill us */
3587 #ifdef SCTP_LOG_CLOSING
3588 sctp_log_closing(inp, NULL, 3);
3590 SCTP_INP_WUNLOCK(inp);
3591 SCTP_ASOC_CREATE_UNLOCK(inp);
3592 SCTP_INP_INFO_WUNLOCK();
3595 if (SCTP_INP_LOCK_CONTENDED(inp))
3597 if (SCTP_INP_READ_CONTENDED(inp))
3599 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3601 /* NOTE: 0 refcount also means no timers are referencing us. */
3602 if ((inp->refcount) ||
3604 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3605 #ifdef SCTP_LOG_CLOSING
3606 sctp_log_closing(inp, NULL, 4);
3608 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3609 SCTP_INP_WUNLOCK(inp);
3610 SCTP_ASOC_CREATE_UNLOCK(inp);
3611 SCTP_INP_INFO_WUNLOCK();
3614 inp->sctp_ep.signature_change.type = 0;
3615 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3617 * Remove it from the list .. last thing we need a lock for.
3619 LIST_REMOVE(inp, sctp_list);
3620 SCTP_INP_WUNLOCK(inp);
3621 SCTP_ASOC_CREATE_UNLOCK(inp);
3622 SCTP_INP_INFO_WUNLOCK();
3624 #ifdef SCTP_LOG_CLOSING
3625 sctp_log_closing(inp, NULL, 5);
3629 if ((inp->sctp_asocidhash) != NULL) {
3630 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3631 inp->sctp_asocidhash = NULL;
3633 /* sa_ignore FREED_MEMORY */
3634 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3635 /* Its only abandoned if it had data left */
3637 SCTP_STAT_INCR(sctps_left_abandon);
3639 TAILQ_REMOVE(&inp->read_queue, sq, next);
3640 sctp_free_remote_addr(sq->whoFrom);
3642 so->so_rcv.sb_cc -= sq->length;
3644 sctp_m_freem(sq->data);
3648 * no need to free the net count, since at this point all
3651 sctp_free_a_readq(NULL, sq);
3653 /* Now the sctp_pcb things */
3655 * free each asoc if it is not already closed/free. we can't use the
3656 * macro here since le_next will get freed as part of the
3657 * sctp_free_assoc() call.
3659 if (ip_pcb->inp_options) {
3660 (void)sctp_m_free(ip_pcb->inp_options);
3661 ip_pcb->inp_options = 0;
3666 if (ip_pcb->inp_vflag & INP_IPV6) {
3667 ip6_freepcbopts(ip_pcb->in6p_outputopts);
3670 ip_pcb->inp_vflag = 0;
3671 /* free up authentication fields */
3672 if (inp->sctp_ep.local_auth_chunks != NULL)
3673 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3674 if (inp->sctp_ep.local_hmacs != NULL)
3675 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3677 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3678 LIST_REMOVE(shared_key, next);
3679 sctp_free_sharedkey(shared_key);
3680 /* sa_ignore FREED_MEMORY */
3684 * if we have an address list the following will free the list of
3685 * ifaddr's that are set into this ep. Again macro limitations here,
3686 * since the LIST_FOREACH could be a bad idea.
3688 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3689 sctp_remove_laddr(laddr);
3692 #ifdef SCTP_TRACK_FREED_ASOCS
3694 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3695 LIST_REMOVE(asoc, sctp_tcblist);
3696 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3697 SCTP_DECR_ASOC_COUNT();
3699 /* *** END TEMP CODE *** */
3701 /* Now lets see about freeing the EP hash table. */
3702 if (inp->sctp_tcbhash != NULL) {
3703 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3704 inp->sctp_tcbhash = NULL;
3706 /* Now we must put the ep memory back into the zone pool */
3707 crfree(inp->ip_inp.inp.inp_cred);
3708 INP_LOCK_DESTROY(&inp->ip_inp.inp);
3709 SCTP_INP_LOCK_DESTROY(inp);
3710 SCTP_INP_READ_DESTROY(inp);
3711 SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3712 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3713 SCTP_DECR_EP_COUNT();
3718 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3720 struct sctp_nets *net;
3722 /* locate the address */
3723 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3724 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3732 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3734 struct sctp_ifa *sctp_ifa;
3736 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3745 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3746 * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3750 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3751 struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3754 * The following is redundant to the same lines in the
3755 * sctp_aloc_assoc() but is needed since others call the add address
3758 struct sctp_nets *net, *netfirst;
3761 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3763 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3765 netfirst = sctp_findnet(stcb, newaddr);
3768 * Lie and return ok, we don't want to make the association
3769 * go away for this behavior. It will happen in the TCP
3770 * model in a connected socket. It does not reach the hash
3771 * table until after the association is built so it can't be
3772 * found. Mark as reachable, since the initial creation will
3773 * have been cleared and the NOT_IN_ASSOC flag will have
3774 * been added... and we don't want to end up removing it
3777 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3778 netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3779 SCTP_ADDR_UNCONFIRMED);
3781 netfirst->dest_state = SCTP_ADDR_REACHABLE;
3787 switch (newaddr->sa_family) {
3791 struct sockaddr_in *sin;
3793 sin = (struct sockaddr_in *)newaddr;
3794 if (sin->sin_addr.s_addr == 0) {
3795 /* Invalid address */
3798 /* zero out the zero area */
3799 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3801 /* assure len is set */
3802 sin->sin_len = sizeof(struct sockaddr_in);
3804 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3805 stcb->asoc.scope.ipv4_local_scope = 1;
3808 /* Validate the address is in scope */
3809 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3810 (stcb->asoc.scope.ipv4_local_scope == 0)) {
3820 struct sockaddr_in6 *sin6;
3822 sin6 = (struct sockaddr_in6 *)newaddr;
3823 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3824 /* Invalid address */
3827 /* assure len is set */
3828 sin6->sin6_len = sizeof(struct sockaddr_in6);
3830 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3831 stcb->asoc.scope.loopback_scope = 1;
3832 stcb->asoc.scope.local_scope = 0;
3833 stcb->asoc.scope.ipv4_local_scope = 1;
3834 stcb->asoc.scope.site_scope = 1;
3835 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3837 * If the new destination is a
3838 * LINK_LOCAL we must have common
3839 * site scope. Don't set the local
3840 * scope since we may not share all
3841 * links, only loopback can do this.
3842 * Links on the local network would
3843 * also be on our private network
3846 stcb->asoc.scope.ipv4_local_scope = 1;
3847 stcb->asoc.scope.site_scope = 1;
3848 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3850 * If the new destination is
3851 * SITE_LOCAL then we must have site
3854 stcb->asoc.scope.site_scope = 1;
3857 /* Validate the address is in scope */
3858 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3859 (stcb->asoc.scope.loopback_scope == 0)) {
3861 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3862 (stcb->asoc.scope.local_scope == 0)) {
3864 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3865 (stcb->asoc.scope.site_scope == 0)) {
3873 /* not supported family type */
3876 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3880 SCTP_INCR_RADDR_COUNT();
3881 memset(net, 0, sizeof(struct sctp_nets));
3882 (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3883 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3884 switch (newaddr->sa_family) {
3887 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3892 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3898 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3899 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3900 stcb->asoc.scope.loopback_scope = 1;
3901 stcb->asoc.scope.ipv4_local_scope = 1;
3902 stcb->asoc.scope.local_scope = 0;
3903 stcb->asoc.scope.site_scope = 1;
3906 net->failure_threshold = stcb->asoc.def_net_failure;
3907 net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3908 if (addr_inscope == 0) {
3909 net->dest_state = (SCTP_ADDR_REACHABLE |
3910 SCTP_ADDR_OUT_OF_SCOPE);
3912 if (from == SCTP_ADDR_IS_CONFIRMED)
3913 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3914 net->dest_state = SCTP_ADDR_REACHABLE;
3916 net->dest_state = SCTP_ADDR_REACHABLE |
3917 SCTP_ADDR_UNCONFIRMED;
3920 * We set this to 0, the timer code knows that this means its an
3923 net->rto_needed = 1;
3925 net->RTO_measured = 0;
3926 stcb->asoc.numnets++;
3928 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3930 net->dscp = stcb->asoc.default_dscp;
3932 net->flowlabel = stcb->asoc.default_flowlabel;
3934 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3935 net->dest_state |= SCTP_ADDR_NOHB;
3937 net->dest_state &= ~SCTP_ADDR_NOHB;
3939 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3940 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3942 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3944 net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3945 /* Init the timer structure */
3946 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3947 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3948 SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3950 /* Now generate a route for this guy */
3952 /* KAME hack: embed scopeid */
3953 if (newaddr->sa_family == AF_INET6) {
3954 struct sockaddr_in6 *sin6;
3956 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3957 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3958 sin6->sin6_scope_id = 0;
3961 SCTP_RTALLOC((sctp_route_t *)&net->ro,
3963 stcb->sctp_ep->fibnum);
3965 net->src_addr_selected = 0;
3966 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3967 /* Get source address */
3968 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3970 (sctp_route_t *)&net->ro,
3974 if (stcb->asoc.default_mtu > 0) {
3975 net->mtu = stcb->asoc.default_mtu;
3976 switch (net->ro._l_addr.sa.sa_family) {
3979 net->mtu += SCTP_MIN_V4_OVERHEAD;
3984 net->mtu += SCTP_MIN_OVERHEAD;
3990 #if defined(INET) || defined(INET6)
3992 net->mtu += (uint32_t)sizeof(struct udphdr);
3995 } else if (net->ro._s_addr != NULL) {
3996 uint32_t imtu, rmtu, hcmtu;
3998 net->src_addr_selected = 1;
3999 /* Now get the interface MTU */
4000 if (net->ro._s_addr->ifn_p != NULL) {
4001 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4005 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4006 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
4007 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
4010 * Start things off to match mtu of
4013 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4014 net->ro.ro_rt, net->mtu);
4018 if (net->mtu == 0) {
4019 if (stcb->asoc.default_mtu > 0) {
4020 net->mtu = stcb->asoc.default_mtu;
4021 switch (net->ro._l_addr.sa.sa_family) {
4024 net->mtu += SCTP_MIN_V4_OVERHEAD;
4029 net->mtu += SCTP_MIN_OVERHEAD;
4035 #if defined(INET) || defined(INET6)
4037 net->mtu += (uint32_t)sizeof(struct udphdr);
4041 switch (newaddr->sa_family) {
4044 net->mtu = SCTP_DEFAULT_MTU;
4057 #if defined(INET) || defined(INET6)
4059 net->mtu -= (uint32_t)sizeof(struct udphdr);
4062 if (from == SCTP_ALLOC_ASOC) {
4063 stcb->asoc.smallest_mtu = net->mtu;
4065 if (stcb->asoc.smallest_mtu > net->mtu) {
4066 sctp_pathmtu_adjustment(stcb, net->mtu);
4069 if (newaddr->sa_family == AF_INET6) {
4070 struct sockaddr_in6 *sin6;
4072 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4073 (void)sa6_recoverscope(sin6);
4077 /* JRS - Use the congestion control given in the CC module */
4078 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4079 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4082 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4083 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4085 net->find_pseudo_cumack = 1;
4086 net->find_rtx_pseudo_cumack = 1;
4087 /* Choose an initial flowid. */
4088 net->flowid = stcb->asoc.my_vtag ^
4089 ntohs(stcb->rport) ^
4090 ntohs(stcb->sctp_ep->sctp_lport);
4091 net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4095 netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4096 if (net->ro.ro_rt == NULL) {
4097 /* Since we have no route put it at the back */
4098 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4099 } else if (netfirst == NULL) {
4100 /* We are the first one in the pool. */
4101 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4102 } else if (netfirst->ro.ro_rt == NULL) {
4104 * First one has NO route. Place this one ahead of the first
4107 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4108 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4110 * This one has a different interface than the one at the
4111 * top of the list. Place it ahead.
4113 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4116 * Ok we have the same interface as the first one. Move
4117 * forward until we find either a) one with a NULL route...
4118 * insert ahead of that b) one with a different ifp.. insert
4119 * after that. c) end of the list.. insert at the tail.
4121 struct sctp_nets *netlook;
4124 netlook = TAILQ_NEXT(netfirst, sctp_next);
4125 if (netlook == NULL) {
4126 /* End of the list */
4127 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4129 } else if (netlook->ro.ro_rt == NULL) {
4130 /* next one has NO route */
4131 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4133 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4134 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4140 } while (netlook != NULL);
4143 /* got to have a primary set */
4144 if (stcb->asoc.primary_destination == 0) {
4145 stcb->asoc.primary_destination = net;
4146 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4148 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4149 /* No route to current primary adopt new primary */
4150 stcb->asoc.primary_destination = net;
4152 /* Validate primary is first */
4153 net = TAILQ_FIRST(&stcb->asoc.nets);
4154 if ((net != stcb->asoc.primary_destination) &&
4155 (stcb->asoc.primary_destination)) {
4157 * first one on the list is NOT the primary sctp_cmpaddr()
4158 * is much more efficient if the primary is the first on the
4161 TAILQ_REMOVE(&stcb->asoc.nets,
4162 stcb->asoc.primary_destination, sctp_next);
4163 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4164 stcb->asoc.primary_destination, sctp_next);
4171 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4174 struct sctpasochead *head;
4175 struct sctp_tcb *lstcb;
4178 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4183 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4184 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4186 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4187 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4189 id = inp->sctp_associd_counter;
4190 inp->sctp_associd_counter++;
4191 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4195 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4196 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4197 stcb->asoc.in_asocid_hash = 1;
4202 * allocate an association and add it to the endpoint. The caller must be
4203 * careful to add all additional addresses once they are know right away or
4204 * else the assoc will be may experience a blackout scenario.
4207 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4208 int *error, uint32_t override_tag, uint32_t vrf_id,
4209 uint16_t o_streams, uint16_t port,
4211 int initialize_auth_params)
4213 /* note the p argument is only valid in unbound sockets */
4215 struct sctp_tcb *stcb;
4216 struct sctp_association *asoc;
4217 struct sctpasochead *head;
4222 * Assumption made here: Caller has done a
4223 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4224 * address does not exist already.
4226 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4227 /* Hit max assoc, sorry no more */
4228 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4232 if (firstaddr == NULL) {
4233 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4237 SCTP_INP_RLOCK(inp);
4238 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4239 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4240 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4242 * If its in the TCP pool, its NOT allowed to create an
4243 * association. The parent listener needs to call
4244 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4245 * off, or connected one does this.. its an error.
4247 SCTP_INP_RUNLOCK(inp);
4248 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4252 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4253 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4254 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4255 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4256 SCTP_INP_RUNLOCK(inp);
4257 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4262 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4265 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4266 switch (firstaddr->sa_family) {
4269 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4270 ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4275 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4276 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4283 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4285 #endif /* SCTP_DEBUG */
4286 switch (firstaddr->sa_family) {
4290 struct sockaddr_in *sin;
4292 sin = (struct sockaddr_in *)firstaddr;
4293 if ((ntohs(sin->sin_port) == 0) ||
4294 (sin->sin_addr.s_addr == INADDR_ANY) ||
4295 (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4296 IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4297 (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) &&
4298 (SCTP_IPV6_V6ONLY(inp) != 0))) {
4299 /* Invalid address */
4300 SCTP_INP_RUNLOCK(inp);
4301 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4305 rport = sin->sin_port;
4312 struct sockaddr_in6 *sin6;
4314 sin6 = (struct sockaddr_in6 *)firstaddr;
4315 if ((ntohs(sin6->sin6_port) == 0) ||
4316 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4317 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4318 ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4319 /* Invalid address */
4320 SCTP_INP_RUNLOCK(inp);
4321 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4325 rport = sin6->sin6_port;
4330 /* not supported family type */
4331 SCTP_INP_RUNLOCK(inp);
4332 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4336 SCTP_INP_RUNLOCK(inp);
4337 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4339 * If you have not performed a bind, then we need to do the
4340 * ephemeral bind for you.
4342 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4343 /* bind error, probably perm */
4348 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4350 /* out of memory? */
4351 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4355 SCTP_INCR_ASOC_COUNT();
4357 memset(stcb, 0, sizeof(*stcb));
4360 SCTP_TCB_LOCK_INIT(stcb);
4361 SCTP_TCB_SEND_LOCK_INIT(stcb);
4362 stcb->rport = rport;
4363 /* setup back pointer's */
4364 stcb->sctp_ep = inp;
4365 stcb->sctp_socket = inp->sctp_socket;
4366 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4368 SCTP_TCB_LOCK_DESTROY(stcb);
4369 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4370 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4371 SCTP_DECR_ASOC_COUNT();
4376 SCTP_INP_INFO_WLOCK();
4377 SCTP_INP_WLOCK(inp);
4378 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4379 /* inpcb freed while alloc going on */
4380 SCTP_TCB_LOCK_DESTROY(stcb);
4381 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4382 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4383 SCTP_INP_WUNLOCK(inp);
4384 SCTP_INP_INFO_WUNLOCK();
4385 SCTP_DECR_ASOC_COUNT();
4386 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4390 SCTP_TCB_LOCK(stcb);
4392 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4393 /* now that my_vtag is set, add it to the hash */
4394 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4395 /* put it in the bucket in the vtag hash of assoc's for the system */
4396 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4397 SCTP_INP_INFO_WUNLOCK();
4399 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4400 /* failure.. memory error? */
4401 if (asoc->strmout) {
4402 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4403 asoc->strmout = NULL;
4405 if (asoc->mapping_array) {
4406 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4407 asoc->mapping_array = NULL;
4409 if (asoc->nr_mapping_array) {
4410 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4411 asoc->nr_mapping_array = NULL;
4413 SCTP_DECR_ASOC_COUNT();
4414 SCTP_TCB_UNLOCK(stcb);
4415 SCTP_TCB_LOCK_DESTROY(stcb);
4416 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4417 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4418 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4419 SCTP_INP_WUNLOCK(inp);
4420 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4424 /* Init all the timers */
4425 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4426 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4427 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4428 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4429 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4430 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4432 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4433 /* now file the port under the hash as well */
4434 if (inp->sctp_tcbhash != NULL) {
4435 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4436 inp->sctp_hashmark)];
4437 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4439 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4440 sctp_initialize_auth_params(inp, stcb);
4442 SCTP_INP_WUNLOCK(inp);
4443 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4449 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4451 struct sctp_inpcb *inp;
4452 struct sctp_association *asoc;
4454 inp = stcb->sctp_ep;
4457 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4458 if (net == asoc->primary_destination) {
4460 struct sctp_nets *lnet;
4462 lnet = TAILQ_FIRST(&asoc->nets);
4464 * Mobility adaptation Ideally, if deleted destination is
4465 * the primary, it becomes a fast retransmission trigger by
4466 * the subsequent SET PRIMARY. (by micchie)
4468 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4469 SCTP_MOBILITY_BASE) ||
4470 sctp_is_mobility_feature_on(stcb->sctp_ep,
4471 SCTP_MOBILITY_FASTHANDOFF)) {
4472 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4473 if (asoc->deleted_primary != NULL) {
4474 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4477 asoc->deleted_primary = net;
4478 atomic_add_int(&net->ref_count, 1);
4479 memset(&net->lastsa, 0, sizeof(net->lastsa));
4480 memset(&net->lastsv, 0, sizeof(net->lastsv));
4481 sctp_mobility_feature_on(stcb->sctp_ep,
4482 SCTP_MOBILITY_PRIM_DELETED);
4483 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4484 stcb->sctp_ep, stcb, NULL);
4487 /* Try to find a confirmed primary */
4488 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4490 if (net == asoc->last_data_chunk_from) {
4492 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4494 if (net == asoc->last_control_chunk_from) {
4496 asoc->last_control_chunk_from = NULL;
4498 if (net == stcb->asoc.alternate) {
4499 sctp_free_remote_addr(stcb->asoc.alternate);
4500 stcb->asoc.alternate = NULL;
4502 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4503 SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4504 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4505 SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4506 net->dest_state |= SCTP_ADDR_BEING_DELETED;
4507 sctp_free_remote_addr(net);
4511 * remove a remote endpoint address from an association, it will fail if the
4512 * address does not exist.
4515 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4518 * Here we need to remove a remote address. This is quite simple, we
4519 * first find it in the list of address for the association
4520 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4521 * on that item. Note we do not allow it to be removed if there are
4522 * no other addresses.
4524 struct sctp_association *asoc;
4525 struct sctp_nets *net, *nnet;
4529 /* locate the address */
4530 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4531 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4534 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4536 /* we found the guy */
4537 if (asoc->numnets < 2) {
4538 /* Must have at LEAST two remote addresses */
4541 sctp_remove_net(stcb, net);
4551 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4553 struct sctpvtaghead *chain;
4554 struct sctp_tagblock *twait_block;
4558 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4559 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4560 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4561 if ((twait_block->vtag_block[i].v_tag == tag) &&
4562 (twait_block->vtag_block[i].lport == lport) &&
4563 (twait_block->vtag_block[i].rport == rport)) {
4564 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4565 twait_block->vtag_block[i].v_tag = 0;
4566 twait_block->vtag_block[i].lport = 0;
4567 twait_block->vtag_block[i].rport = 0;
4578 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4580 struct sctpvtaghead *chain;
4581 struct sctp_tagblock *twait_block;
4585 SCTP_INP_INFO_WLOCK();
4586 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4587 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4588 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4589 if ((twait_block->vtag_block[i].v_tag == tag) &&
4590 (twait_block->vtag_block[i].lport == lport) &&
4591 (twait_block->vtag_block[i].rport == rport)) {
4599 SCTP_INP_INFO_WUNLOCK();
4605 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4607 struct sctpvtaghead *chain;
4608 struct sctp_tagblock *twait_block;
4616 (void)SCTP_GETTIME_TIMEVAL(&now);
4617 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4619 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4620 /* Block(s) present, lets find space, and expire on the fly */
4621 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4622 if ((twait_block->vtag_block[i].v_tag == 0) &&
4624 twait_block->vtag_block[i].tv_sec_at_expire =
4626 twait_block->vtag_block[i].v_tag = tag;
4627 twait_block->vtag_block[i].lport = lport;
4628 twait_block->vtag_block[i].rport = rport;
4630 } else if ((twait_block->vtag_block[i].v_tag) &&
4631 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4632 /* Audit expires this guy */
4633 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4634 twait_block->vtag_block[i].v_tag = 0;
4635 twait_block->vtag_block[i].lport = 0;
4636 twait_block->vtag_block[i].rport = 0;
4638 /* Reuse it for my new tag */
4639 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4640 twait_block->vtag_block[i].v_tag = tag;
4641 twait_block->vtag_block[i].lport = lport;
4642 twait_block->vtag_block[i].rport = rport;
4649 * We only do up to the block where we can place our
4655 /* Need to add a new block to chain */
4657 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4658 sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4659 if (twait_block == NULL) {
4662 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4663 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4664 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4665 twait_block->vtag_block[0].v_tag = tag;
4666 twait_block->vtag_block[0].lport = lport;
4667 twait_block->vtag_block[0].rport = rport;
4672 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4674 struct sctp_tmit_chunk *chk, *nchk;
4675 struct sctp_queued_to_read *control, *ncontrol;
4677 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4678 TAILQ_REMOVE(rh, control, next_instrm);
4679 control->on_strm_q = 0;
4680 if (control->on_read_q == 0) {
4681 sctp_free_remote_addr(control->whoFrom);
4682 if (control->data) {
4683 sctp_m_freem(control->data);
4684 control->data = NULL;
4687 /* Reassembly free? */
4688 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4689 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4691 sctp_m_freem(chk->data);
4694 if (chk->holds_key_ref)
4695 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4696 sctp_free_remote_addr(chk->whoTo);
4697 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4698 SCTP_DECR_CHK_COUNT();
4699 /* sa_ignore FREED_MEMORY */
4702 * We don't free the address here since all the net's were
4705 if (control->on_read_q == 0) {
4706 sctp_free_a_readq(stcb, control);
4712 * Free the association after un-hashing the remote port. This
4713 * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4714 * expect that the input to this function IS a locked TCB.
4715 * It will return 0, if it did NOT destroy the association (instead
4716 * it unlocks it. It will return NON-zero if it either destroyed the
4717 * association OR the association is already destroyed.
4720 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4723 struct sctp_association *asoc;
4724 struct sctp_nets *net, *nnet;
4725 struct sctp_laddr *laddr, *naddr;
4726 struct sctp_tmit_chunk *chk, *nchk;
4727 struct sctp_asconf_addr *aparam, *naparam;
4728 struct sctp_asconf_ack *aack, *naack;
4729 struct sctp_stream_reset_list *strrst, *nstrrst;
4730 struct sctp_queued_to_read *sq, *nsq;
4731 struct sctp_stream_queue_pending *sp, *nsp;
4732 sctp_sharedkey_t *shared_key, *nshared_key;
4735 /* first, lets purge the entry from the hash table. */
4737 #ifdef SCTP_LOG_CLOSING
4738 sctp_log_closing(inp, stcb, 6);
4740 if (stcb->asoc.state == 0) {
4741 #ifdef SCTP_LOG_CLOSING
4742 sctp_log_closing(inp, NULL, 7);
4744 /* there is no asoc, really TSNH :-0 */
4747 SCTP_TCB_SEND_LOCK(stcb);
4748 if (stcb->asoc.alternate) {
4749 sctp_free_remote_addr(stcb->asoc.alternate);
4750 stcb->asoc.alternate = NULL;
4753 if (stcb->freed_from_where == 0) {
4754 /* Only record the first place free happened from */
4755 stcb->freed_from_where = from_location;
4760 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4761 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4762 /* nothing around */
4765 so = inp->sctp_socket;
4768 * We used timer based freeing if a reader or writer is in the way.
4769 * So we first check if we are actually being called from a timer,
4770 * if so we abort early if a reader or writer is still in the way.
4772 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4773 (from_inpcbfree == SCTP_NORMAL_PROC)) {
4775 * is it the timer driving us? if so are the reader/writers
4778 if (stcb->asoc.refcnt) {
4779 /* nope, reader or writer in the way */
4780 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4781 /* no asoc destroyed */
4782 SCTP_TCB_SEND_UNLOCK(stcb);
4783 SCTP_TCB_UNLOCK(stcb);
4784 #ifdef SCTP_LOG_CLOSING
4785 sctp_log_closing(inp, stcb, 8);
4790 /* Now clean up any other timers */
4791 sctp_stop_association_timers(stcb, false);
4792 /* Now the read queue needs to be cleaned up (only once) */
4793 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4794 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4795 SCTP_INP_READ_LOCK(inp);
4796 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4797 if (sq->stcb == stcb) {
4798 sq->do_not_ref_stcb = 1;
4799 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4801 * If there is no end, there never will be
4804 if (sq->end_added == 0) {
4805 /* Held for PD-API clear that. */
4806 sq->pdapi_aborted = 1;
4807 sq->held_length = 0;
4808 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4810 * Need to add a PD-API
4811 * aborted indication.
4812 * Setting the control_pdapi
4813 * assures that it will be
4814 * added right after this
4819 stcb->asoc.control_pdapi = sq;
4820 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4821 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4823 SCTP_PARTIAL_DELIVERY_ABORTED,
4826 stcb->asoc.control_pdapi = NULL;
4829 /* Add an end to wake them */
4833 SCTP_INP_READ_UNLOCK(inp);
4834 if (stcb->block_entry) {
4835 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4836 stcb->block_entry->error = ECONNRESET;
4837 stcb->block_entry = NULL;
4840 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4842 * Someone holds a reference OR the socket is unaccepted
4845 if ((stcb->asoc.refcnt) ||
4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4847 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4848 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4849 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4851 SCTP_TCB_SEND_UNLOCK(stcb);
4852 SCTP_TCB_UNLOCK(stcb);
4853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4854 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4855 /* nothing around */
4858 /* Wake any reader/writers */
4859 sctp_sorwakeup(inp, so);
4860 sctp_sowwakeup(inp, so);
4863 #ifdef SCTP_LOG_CLOSING
4864 sctp_log_closing(inp, stcb, 9);
4866 /* no asoc destroyed */
4869 #ifdef SCTP_LOG_CLOSING
4870 sctp_log_closing(inp, stcb, 10);
4873 * When I reach here, no others want to kill the assoc yet.. and I
4874 * own the lock. Now its possible an abort comes in when I do the
4875 * lock exchange below to grab all the locks to do the final take
4876 * out. to prevent this we increment the count, which will start a
4877 * timer and blow out above thus assuring us that we hold exclusive
4878 * killing of the asoc. Note that after getting back the TCB lock we
4879 * will go ahead and increment the counter back up and stop any
4880 * timer a passing stranger may have started :-S
4882 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4883 atomic_add_int(&stcb->asoc.refcnt, 1);
4885 SCTP_TCB_SEND_UNLOCK(stcb);
4886 SCTP_TCB_UNLOCK(stcb);
4887 SCTP_INP_INFO_WLOCK();
4888 SCTP_INP_WLOCK(inp);
4889 SCTP_TCB_LOCK(stcb);
4890 SCTP_TCB_SEND_LOCK(stcb);
4892 /* Double check the GONE flag */
4893 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4894 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4895 /* nothing around */
4898 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4899 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4901 * For TCP type we need special handling when we are
4902 * connected. We also include the peel'ed off ones to.
4904 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4905 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4906 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4908 SOCKBUF_LOCK(&so->so_rcv);
4909 so->so_state &= ~(SS_ISCONNECTING |
4910 SS_ISDISCONNECTING |
4913 so->so_state |= SS_ISDISCONNECTED;
4914 socantrcvmore_locked(so);
4916 sctp_sowwakeup(inp, so);
4917 sctp_sorwakeup(inp, so);
4924 * Make it invalid too, that way if its about to run it will abort
4927 /* re-increment the lock */
4928 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4929 atomic_add_int(&stcb->asoc.refcnt, -1);
4931 if (stcb->asoc.refcnt) {
4932 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4933 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4934 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4935 SCTP_INP_INFO_WUNLOCK();
4936 SCTP_INP_WUNLOCK(inp);
4938 SCTP_TCB_SEND_UNLOCK(stcb);
4939 SCTP_TCB_UNLOCK(stcb);
4943 if (inp->sctp_tcbhash) {
4944 LIST_REMOVE(stcb, sctp_tcbhash);
4946 if (stcb->asoc.in_asocid_hash) {
4947 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4949 /* Now lets remove it from the list of ALL associations in the EP */
4950 LIST_REMOVE(stcb, sctp_tcblist);
4951 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4952 SCTP_INP_INCR_REF(inp);
4953 SCTP_INP_WUNLOCK(inp);
4955 /* pull from vtag hash */
4956 LIST_REMOVE(stcb, sctp_asocs);
4957 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4958 inp->sctp_lport, stcb->rport);
4961 * Now restop the timers to be sure this is paranoia at is finest!
4963 sctp_stop_association_timers(stcb, true);
4966 * The chunk lists and such SHOULD be empty but we check them just
4969 /* anything on the wheel needs to be removed */
4970 for (i = 0; i < asoc->streamoutcnt; i++) {
4971 struct sctp_stream_out *outs;
4973 outs = &asoc->strmout[i];
4974 /* now clean up any chunks here */
4975 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4976 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4977 TAILQ_REMOVE(&outs->outqueue, sp, next);
4978 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4979 sctp_free_spbufspace(stcb, asoc, sp);
4982 /* Still an open socket - report */
4983 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4984 0, (void *)sp, SCTP_SO_LOCKED);
4987 sctp_m_freem(sp->data);
4989 sp->tail_mbuf = NULL;
4994 sctp_free_remote_addr(sp->net);
4997 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5000 /* sa_ignore FREED_MEMORY */
5001 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5002 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5003 SCTP_FREE(strrst, SCTP_M_STRESET);
5005 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5006 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5008 sctp_m_freem(sq->data);
5011 sctp_free_remote_addr(sq->whoFrom);
5014 /* Free the ctl entry */
5015 sctp_free_a_readq(stcb, sq);
5016 /* sa_ignore FREED_MEMORY */
5018 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5019 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5021 sctp_m_freem(chk->data);
5024 if (chk->holds_key_ref)
5025 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5026 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5027 SCTP_DECR_CHK_COUNT();
5028 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5029 asoc->free_chunk_cnt--;
5030 /* sa_ignore FREED_MEMORY */
5032 /* pending send queue SHOULD be empty */
5033 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5034 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5035 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5038 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5041 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5044 /* Still a socket? */
5045 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5046 0, chk, SCTP_SO_LOCKED);
5049 sctp_m_freem(chk->data);
5053 if (chk->holds_key_ref)
5054 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5056 sctp_free_remote_addr(chk->whoTo);
5059 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5060 SCTP_DECR_CHK_COUNT();
5061 /* sa_ignore FREED_MEMORY */
5063 /* sent queue SHOULD be empty */
5064 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5065 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5066 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5067 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5070 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5074 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5077 /* Still a socket? */
5078 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5079 0, chk, SCTP_SO_LOCKED);
5082 sctp_m_freem(chk->data);
5086 if (chk->holds_key_ref)
5087 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5088 sctp_free_remote_addr(chk->whoTo);
5089 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5090 SCTP_DECR_CHK_COUNT();
5091 /* sa_ignore FREED_MEMORY */
5094 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5095 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5096 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5100 /* control queue MAY not be empty */
5101 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5102 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5104 sctp_m_freem(chk->data);
5107 if (chk->holds_key_ref)
5108 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5109 sctp_free_remote_addr(chk->whoTo);
5110 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5111 SCTP_DECR_CHK_COUNT();
5112 /* sa_ignore FREED_MEMORY */
5114 /* ASCONF queue MAY not be empty */
5115 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5116 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5118 sctp_m_freem(chk->data);
5121 if (chk->holds_key_ref)
5122 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5123 sctp_free_remote_addr(chk->whoTo);
5124 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5125 SCTP_DECR_CHK_COUNT();
5126 /* sa_ignore FREED_MEMORY */
5128 if (asoc->mapping_array) {
5129 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5130 asoc->mapping_array = NULL;
5132 if (asoc->nr_mapping_array) {
5133 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5134 asoc->nr_mapping_array = NULL;
5136 /* the stream outs */
5137 if (asoc->strmout) {
5138 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5139 asoc->strmout = NULL;
5141 asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5143 for (i = 0; i < asoc->streamincnt; i++) {
5144 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5145 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5147 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5148 asoc->strmin = NULL;
5150 asoc->streamincnt = 0;
5151 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5153 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5154 panic("no net's left alloc'ed, or list points to itself");
5157 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5158 sctp_free_remote_addr(net);
5160 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5161 /* sa_ignore FREED_MEMORY */
5162 sctp_remove_laddr(laddr);
5165 /* pending asconf (address) parameters */
5166 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5167 /* sa_ignore FREED_MEMORY */
5168 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5169 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5171 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5172 /* sa_ignore FREED_MEMORY */
5173 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5174 if (aack->data != NULL) {
5175 sctp_m_freem(aack->data);
5177 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5179 /* clean up auth stuff */
5180 if (asoc->local_hmacs)
5181 sctp_free_hmaclist(asoc->local_hmacs);
5182 if (asoc->peer_hmacs)
5183 sctp_free_hmaclist(asoc->peer_hmacs);
5185 if (asoc->local_auth_chunks)
5186 sctp_free_chunklist(asoc->local_auth_chunks);
5187 if (asoc->peer_auth_chunks)
5188 sctp_free_chunklist(asoc->peer_auth_chunks);
5190 sctp_free_authinfo(&asoc->authinfo);
5192 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5193 LIST_REMOVE(shared_key, next);
5194 sctp_free_sharedkey(shared_key);
5195 /* sa_ignore FREED_MEMORY */
5198 /* Insert new items here :> */
5200 /* Get rid of LOCK */
5201 SCTP_TCB_SEND_UNLOCK(stcb);
5202 SCTP_TCB_UNLOCK(stcb);
5203 SCTP_TCB_LOCK_DESTROY(stcb);
5204 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5205 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5206 SCTP_INP_INFO_WUNLOCK();
5207 SCTP_INP_RLOCK(inp);
5209 #ifdef SCTP_TRACK_FREED_ASOCS
5210 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5211 /* now clean up the tasoc itself */
5212 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5213 SCTP_DECR_ASOC_COUNT();
5215 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5218 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5219 SCTP_DECR_ASOC_COUNT();
5221 if (from_inpcbfree == SCTP_NORMAL_PROC) {
5222 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5224 * If its NOT the inp_free calling us AND sctp_close
5225 * as been called, we call back...
5227 SCTP_INP_RUNLOCK(inp);
5229 * This will start the kill timer (if we are the
5230 * last one) since we hold an increment yet. But
5231 * this is the only safe way to do this since
5232 * otherwise if the socket closes at the same time
5233 * we are here we might collide in the cleanup.
5235 sctp_inpcb_free(inp,
5236 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5237 SCTP_CALLED_DIRECTLY_NOCMPSET);
5238 SCTP_INP_DECR_REF(inp);
5240 /* The socket is still open. */
5241 SCTP_INP_DECR_REF(inp);
5242 SCTP_INP_RUNLOCK(inp);
5245 /* destroyed the asoc */
5246 #ifdef SCTP_LOG_CLOSING
5247 sctp_log_closing(inp, NULL, 11);
5255 * determine if a destination is "reachable" based upon the addresses bound
5256 * to the current endpoint (e.g. only v4 or v6 currently bound)
5259 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5260 * assoc level v4/v6 flags, as the assoc *may* not have the same address
5261 * types bound as its endpoint
5264 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5266 struct sctp_inpcb *inp;
5270 * No locks here, the TCB, in all cases is already locked and an
5271 * assoc is up. There is either a INP lock by the caller applied (in
5272 * asconf case when deleting an address) or NOT in the HB case,
5273 * however if HB then the INP increment is up and the INP will not
5274 * be removed (on top of the fact that we have a TCB lock). So we
5275 * only want to read the sctp_flags, which is either bound-all or
5276 * not.. no protection needed since once an assoc is up you can't be
5277 * changing your binding.
5279 inp = stcb->sctp_ep;
5280 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5281 /* if bound all, destination is not restricted */
5283 * RRS: Question during lock work: Is this correct? If you
5284 * are bound-all you still might need to obey the V4--V6
5285 * flags??? IMO this bound-all stuff needs to be removed!
5289 /* NOTE: all "scope" checks are done when local addresses are added */
5290 switch (destaddr->sa_family) {
5293 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5298 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5302 /* invalid family, so it's unreachable */
5310 * update the inp_vflags on an endpoint
5313 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5315 struct sctp_laddr *laddr;
5317 /* first clear the flag */
5318 inp->ip_inp.inp.inp_vflag = 0;
5319 /* set the flag based on addresses on the ep list */
5320 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5321 if (laddr->ifa == NULL) {
5322 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5327 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5330 switch (laddr->ifa->address.sa.sa_family) {
5333 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5338 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5348 * Add the address to the endpoint local address list There is nothing to be
5349 * done if we are bound to all addresses
5352 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5354 struct sctp_laddr *laddr;
5355 struct sctp_tcb *stcb;
5360 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5361 /* You are already bound to all. You have it already */
5365 if (ifa->address.sa.sa_family == AF_INET6) {
5366 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5367 /* Can't bind a non-useable addr. */
5372 /* first, is it already present? */
5373 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5374 if (laddr->ifa == ifa) {
5381 /* Not in the ep list */
5382 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5386 /* update inp_vflag flags */
5387 switch (ifa->address.sa.sa_family) {
5390 inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5395 inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5401 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5402 sctp_add_local_addr_restricted(stcb, ifa);
5410 * select a new (hopefully reachable) destination net (should only be used
5411 * when we deleted an ep addr that is the only usable source address to reach
5412 * the destination net)
5415 sctp_select_primary_destination(struct sctp_tcb *stcb)
5417 struct sctp_nets *net;
5419 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5420 /* for now, we'll just pick the first reachable one we find */
5421 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5423 if (sctp_destination_is_reachable(stcb,
5424 (struct sockaddr *)&net->ro._l_addr)) {
5425 /* found a reachable destination */
5426 stcb->asoc.primary_destination = net;
5429 /* I can't there from here! ...we're gonna die shortly... */
5434 * Delete the address from the endpoint local address list. There is nothing
5435 * to be done if we are bound to all addresses
5438 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5440 struct sctp_laddr *laddr;
5444 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5445 /* You are already bound to all. You have it already */
5448 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5449 if (laddr->ifa == ifa) {
5454 if (fnd && (inp->laddr_count < 2)) {
5455 /* can't delete unless there are at LEAST 2 addresses */
5460 * clean up any use of this address go through our
5461 * associations and clear any last_used_address that match
5462 * this one for each assoc, see if a new primary_destination
5465 struct sctp_tcb *stcb;
5467 /* clean up "next_addr_touse" */
5468 if (inp->next_addr_touse == laddr)
5469 /* delete this address */
5470 inp->next_addr_touse = NULL;
5472 /* clean up "last_used_address" */
5473 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5474 struct sctp_nets *net;
5476 SCTP_TCB_LOCK(stcb);
5477 if (stcb->asoc.last_used_address == laddr)
5478 /* delete this address */
5479 stcb->asoc.last_used_address = NULL;
5481 * Now spin through all the nets and purge any ref
5484 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5485 if (net->ro._s_addr == laddr->ifa) {
5486 /* Yep, purge src address selected */
5489 /* delete this address if cached */
5493 net->ro.ro_rt = NULL;
5495 sctp_free_ifa(net->ro._s_addr);
5496 net->ro._s_addr = NULL;
5497 net->src_addr_selected = 0;
5500 SCTP_TCB_UNLOCK(stcb);
5501 } /* for each tcb */
5502 /* remove it from the ep list */
5503 sctp_remove_laddr(laddr);
5505 /* update inp_vflag flags */
5506 sctp_update_ep_vflag(inp);
5512 * Add the address to the TCB local address restricted list.
5513 * This is a "pending" address list (eg. addresses waiting for an
5514 * ASCONF-ACK response) and cannot be used as a valid source address.
5517 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5519 struct sctp_laddr *laddr;
5520 struct sctpladdr *list;
5523 * Assumes TCB is locked.. and possibly the INP. May need to
5524 * confirm/fix that if we need it and is not the case.
5526 list = &stcb->asoc.sctp_restricted_addrs;
5529 if (ifa->address.sa.sa_family == AF_INET6) {
5530 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5531 /* Can't bind a non-existent addr. */
5536 /* does the address already exist? */
5537 LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5538 if (laddr->ifa == ifa) {
5543 /* add to the list */
5544 (void)sctp_insert_laddr(list, ifa, 0);
5549 * Remove a local address from the TCB local address restricted list
5552 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5554 struct sctp_inpcb *inp;
5555 struct sctp_laddr *laddr;
5558 * This is called by asconf work. It is assumed that a) The TCB is
5559 * locked and b) The INP is locked. This is true in as much as I can
5560 * trace through the entry asconf code where I did these locks.
5561 * Again, the ASCONF code is a bit different in that it does lock
5562 * the INP during its work often times. This must be since we don't
5563 * want other proc's looking up things while what they are looking
5564 * up is changing :-D
5567 inp = stcb->sctp_ep;
5568 /* if subset bound and don't allow ASCONF's, can't delete last */
5569 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5570 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5571 if (stcb->sctp_ep->laddr_count < 2) {
5572 /* can't delete last address */
5576 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5577 /* remove the address if it exists */
5578 if (laddr->ifa == NULL)
5580 if (laddr->ifa == ifa) {
5581 sctp_remove_laddr(laddr);
5586 /* address not found! */
5591 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5592 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5594 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5595 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5596 int *sctp_cpuarry = NULL;
5599 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5601 /* Queue a packet to a processor for the specified core */
5602 struct sctp_mcore_queue *qent;
5603 struct sctp_mcore_ctrl *wkq;
5606 if (sctp_mcore_workers == NULL) {
5607 /* Something went way bad during setup */
5608 sctp_input_with_port(m, off, 0);
5611 SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5612 (sizeof(struct sctp_mcore_queue)),
5615 /* This is trouble */
5616 sctp_input_with_port(m, off, 0);
5623 wkq = &sctp_mcore_workers[cpu_to_use];
5624 SCTP_MCORE_QLOCK(wkq);
5626 TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5627 if (wkq->running == 0) {
5630 SCTP_MCORE_QUNLOCK(wkq);
5632 wakeup(&wkq->running);
5637 sctp_mcore_thread(void *arg)
5640 struct sctp_mcore_ctrl *wkq;
5641 struct sctp_mcore_queue *qent;
5643 wkq = (struct sctp_mcore_ctrl *)arg;
5647 /* Wait for first tickle */
5648 SCTP_MCORE_LOCK(wkq);
5650 msleep(&wkq->running,
5652 0, "wait for pkt", 0);
5653 SCTP_MCORE_UNLOCK(wkq);
5655 /* Bind to our cpu */
5656 thread_lock(curthread);
5657 sched_bind(curthread, wkq->cpuid);
5658 thread_unlock(curthread);
5660 /* Now lets start working */
5661 SCTP_MCORE_LOCK(wkq);
5662 /* Now grab lock and go */
5664 SCTP_MCORE_QLOCK(wkq);
5667 qent = TAILQ_FIRST(&wkq->que);
5669 TAILQ_REMOVE(&wkq->que, qent, next);
5670 SCTP_MCORE_QUNLOCK(wkq);
5671 CURVNET_SET(qent->vn);
5675 SCTP_FREE(qent, SCTP_M_MCORE);
5677 sctp_input_with_port(m, off, 0);
5679 SCTP_PRINTF("V6 not yet supported\n");
5683 SCTP_MCORE_QLOCK(wkq);
5686 if (!TAILQ_EMPTY(&wkq->que)) {
5689 SCTP_MCORE_QUNLOCK(wkq);
5690 msleep(&wkq->running,
5692 0, "wait for pkt", 0);
5697 sctp_startup_mcore_threads(void)
5704 if (sctp_mcore_workers != NULL) {
5706 * Already been here in some previous vnet?
5710 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5711 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5713 if (sctp_mcore_workers == NULL) {
5717 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5718 sizeof(struct sctp_mcore_ctrl)));
5719 /* Init the structures */
5720 for (i = 0; i <= mp_maxid; i++) {
5721 TAILQ_INIT(&sctp_mcore_workers[i].que);
5722 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5723 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5724 sctp_mcore_workers[i].cpuid = i;
5726 if (sctp_cpuarry == NULL) {
5727 SCTP_MALLOC(sctp_cpuarry, int *,
5728 (mp_ncpus * sizeof(int)),
5732 sctp_cpuarry[i] = cpu;
5736 /* Now start them all */
5738 (void)kproc_create(sctp_mcore_thread,
5739 (void *)&sctp_mcore_workers[cpu],
5740 &sctp_mcore_workers[cpu].thread_proc,
5752 * SCTP initialization for the PCB structures should be called by
5753 * the sctp_init() function.
5758 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5759 /* error I was called twice */
5762 SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5764 #if defined(SCTP_LOCAL_TRACE_BUF)
5765 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5767 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5768 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5769 ((mp_maxid + 1) * sizeof(struct sctpstat)),
5772 (void)SCTP_GETTIME_TIMEVAL(&tv);
5773 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5774 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5775 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5776 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5778 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5779 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5780 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5782 /* init the empty list of (All) Endpoints */
5783 LIST_INIT(&SCTP_BASE_INFO(listhead));
5786 /* init the hash table of endpoints */
5787 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5788 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5789 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5790 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5791 &SCTP_BASE_INFO(hashasocmark));
5792 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5793 &SCTP_BASE_INFO(hashmark));
5794 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5795 &SCTP_BASE_INFO(hashtcpmark));
5796 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5799 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5800 &SCTP_BASE_INFO(hashvrfmark));
5802 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5803 &SCTP_BASE_INFO(vrf_ifn_hashmark));
5804 /* init the zones */
5806 * FIX ME: Should check for NULL returns, but if it does fail we are
5807 * doomed to panic anyways... add later maybe.
5809 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5810 sizeof(struct sctp_inpcb), maxsockets);
5812 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5813 sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5815 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5816 sizeof(struct sctp_laddr),
5817 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5819 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5820 sizeof(struct sctp_nets),
5821 (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5823 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5824 sizeof(struct sctp_tmit_chunk),
5825 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5827 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5828 sizeof(struct sctp_queued_to_read),
5829 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5831 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5832 sizeof(struct sctp_stream_queue_pending),
5833 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5835 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5836 sizeof(struct sctp_asconf),
5837 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5839 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5840 sizeof(struct sctp_asconf_ack),
5841 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5844 /* Master Lock INIT for info structure */
5845 SCTP_INP_INFO_LOCK_INIT();
5846 SCTP_STATLOG_INIT_LOCK();
5848 SCTP_IPI_COUNT_INIT();
5849 SCTP_IPI_ADDR_INIT();
5850 #ifdef SCTP_PACKET_LOGGING
5851 SCTP_IP_PKTLOG_INIT();
5853 LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5855 SCTP_WQ_ADDR_INIT();
5856 /* not sure if we need all the counts */
5857 SCTP_BASE_INFO(ipi_count_ep) = 0;
5858 /* assoc/tcb zone info */
5859 SCTP_BASE_INFO(ipi_count_asoc) = 0;
5860 /* local addrlist zone info */
5861 SCTP_BASE_INFO(ipi_count_laddr) = 0;
5862 /* remote addrlist zone info */
5863 SCTP_BASE_INFO(ipi_count_raddr) = 0;
5865 SCTP_BASE_INFO(ipi_count_chunk) = 0;
5867 /* socket queue zone info */
5868 SCTP_BASE_INFO(ipi_count_readq) = 0;
5870 /* stream out queue cont */
5871 SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5873 SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5874 SCTP_BASE_INFO(ipi_free_chunks) = 0;
5876 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5878 /* Init the TIMEWAIT list */
5879 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5880 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5882 sctp_startup_iterator();
5884 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5885 sctp_startup_mcore_threads();
5889 * INIT the default VRF which for BSD is the only one, other O/S's
5890 * may have more. But initially they must start with one and then
5891 * add the VRF's as addresses are added.
5893 sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5897 * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5900 sctp_pcb_finish(void)
5902 struct sctp_vrflist *vrf_bucket;
5903 struct sctp_vrf *vrf, *nvrf;
5904 struct sctp_ifn *ifn, *nifn;
5905 struct sctp_ifa *ifa, *nifa;
5906 struct sctpvtaghead *chain;
5907 struct sctp_tagblock *twait_block, *prev_twait_block;
5908 struct sctp_laddr *wi, *nwi;
5910 struct sctp_iterator *it, *nit;
5912 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5913 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5916 SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5918 * In FreeBSD the iterator thread never exits but we do clean up.
5919 * The only way FreeBSD reaches here is if we have VRF's but we
5920 * still add the ifdef to make it compile on old versions.
5923 SCTP_IPI_ITERATOR_WQ_LOCK();
5925 * sctp_iterator_worker() might be working on an it entry without
5926 * holding the lock. We won't find it on the list either and
5927 * continue and free/destroy it. While holding the lock, spin, to
5928 * avoid the race condition as sctp_iterator_worker() will have to
5929 * wait to re-acquire the lock.
5931 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5932 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5933 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5934 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5938 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5939 if (it->vn != curvnet) {
5942 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5943 if (it->function_atend != NULL) {
5944 (*it->function_atend) (it->pointer, it->val);
5946 SCTP_FREE(it, SCTP_M_ITER);
5948 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5949 SCTP_ITERATOR_LOCK();
5950 if ((sctp_it_ctl.cur_it) &&
5951 (sctp_it_ctl.cur_it->vn == curvnet)) {
5952 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5954 SCTP_ITERATOR_UNLOCK();
5955 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5956 SCTP_WQ_ADDR_LOCK();
5957 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5958 LIST_REMOVE(wi, sctp_nxt_addr);
5959 SCTP_DECR_LADDR_COUNT();
5960 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5961 SCTP_FREE(wi->ifa, SCTP_M_IFA);
5963 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5965 SCTP_WQ_ADDR_UNLOCK();
5968 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5971 SCTP_IPI_ADDR_WLOCK();
5972 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5973 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5974 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5975 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5977 LIST_REMOVE(ifa, next_bucket);
5978 LIST_REMOVE(ifa, next_ifa);
5979 SCTP_FREE(ifa, SCTP_M_IFA);
5982 LIST_REMOVE(ifn, next_bucket);
5983 LIST_REMOVE(ifn, next_ifn);
5984 SCTP_FREE(ifn, SCTP_M_IFN);
5986 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5988 LIST_REMOVE(vrf, next_vrf);
5989 SCTP_FREE(vrf, SCTP_M_VRF);
5991 SCTP_IPI_ADDR_WUNLOCK();
5992 /* free the vrf hashes */
5993 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5994 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5997 * free the TIMEWAIT list elements malloc'd in the function
5998 * sctp_add_vtag_to_timewait()...
6000 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6001 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6002 if (!LIST_EMPTY(chain)) {
6003 prev_twait_block = NULL;
6004 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6005 if (prev_twait_block) {
6006 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6008 prev_twait_block = twait_block;
6010 SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6014 /* free the locks and mutexes */
6015 #ifdef SCTP_PACKET_LOGGING
6016 SCTP_IP_PKTLOG_DESTROY();
6018 SCTP_IPI_ADDR_DESTROY();
6019 SCTP_STATLOG_DESTROY();
6020 SCTP_INP_INFO_LOCK_DESTROY();
6022 SCTP_WQ_ADDR_DESTROY();
6024 /* Get rid of other stuff too. */
6025 if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6026 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6027 if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6028 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6029 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6030 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6032 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6034 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6040 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6041 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6042 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6048 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6049 int offset, int limit,
6050 struct sockaddr *src, struct sockaddr *dst,
6051 struct sockaddr *altsa, uint16_t port)
6054 * grub through the INIT pulling addresses and loading them to the
6055 * nets structure in the asoc. The from address in the mbuf should
6056 * also be loaded (if it is not already). This routine can be called
6057 * with either INIT or INIT-ACK's as long as the m points to the IP
6058 * packet and the offset points to the beginning of the parameters.
6060 struct sctp_inpcb *inp;
6061 struct sctp_nets *net, *nnet, *net_tmp;
6062 struct sctp_paramhdr *phdr, param_buf;
6063 struct sctp_tcb *stcb_tmp;
6064 uint16_t ptype, plen;
6065 struct sockaddr *sa;
6066 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6067 struct sctp_auth_random *p_random = NULL;
6068 uint16_t random_len = 0;
6069 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6070 struct sctp_auth_hmac_algo *hmacs = NULL;
6071 uint16_t hmacs_len = 0;
6072 uint8_t saw_asconf = 0;
6073 uint8_t saw_asconf_ack = 0;
6074 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6075 struct sctp_auth_chunk_list *chunks = NULL;
6076 uint16_t num_chunks = 0;
6077 sctp_key_t *new_key;
6079 int got_random = 0, got_hmacs = 0, got_chklist = 0;
6080 uint8_t peer_supports_ecn;
6081 uint8_t peer_supports_prsctp;
6082 uint8_t peer_supports_auth;
6083 uint8_t peer_supports_asconf;
6084 uint8_t peer_supports_asconf_ack;
6085 uint8_t peer_supports_reconfig;
6086 uint8_t peer_supports_nrsack;
6087 uint8_t peer_supports_pktdrop;
6088 uint8_t peer_supports_idata;
6090 struct sockaddr_in sin;
6093 struct sockaddr_in6 sin6;
6096 /* First get the destination address setup too. */
6098 memset(&sin, 0, sizeof(sin));
6099 sin.sin_family = AF_INET;
6100 sin.sin_len = sizeof(sin);
6101 sin.sin_port = stcb->rport;
6104 memset(&sin6, 0, sizeof(sin6));
6105 sin6.sin6_family = AF_INET6;
6106 sin6.sin6_len = sizeof(struct sockaddr_in6);
6107 sin6.sin6_port = stcb->rport;
6114 peer_supports_idata = 0;
6115 peer_supports_ecn = 0;
6116 peer_supports_prsctp = 0;
6117 peer_supports_auth = 0;
6118 peer_supports_asconf = 0;
6119 peer_supports_reconfig = 0;
6120 peer_supports_nrsack = 0;
6121 peer_supports_pktdrop = 0;
6122 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6123 /* mark all addresses that we have currently on the list */
6124 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6126 /* does the source address already exist? if so skip it */
6127 inp = stcb->sctp_ep;
6128 atomic_add_int(&stcb->asoc.refcnt, 1);
6129 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6130 atomic_add_int(&stcb->asoc.refcnt, -1);
6132 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6133 /* we must add the source address */
6134 /* no scope set here since we have a tcb already. */
6135 switch (sa->sa_family) {
6138 if (stcb->asoc.scope.ipv4_addr_legal) {
6139 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6147 if (stcb->asoc.scope.ipv6_addr_legal) {
6148 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6158 if (net_tmp != NULL && stcb_tmp == stcb) {
6159 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6160 } else if (stcb_tmp != stcb) {
6161 /* It belongs to another association? */
6163 SCTP_TCB_UNLOCK(stcb_tmp);
6167 if (stcb->asoc.state == 0) {
6168 /* the assoc was freed? */
6171 /* now we must go through each of the params. */
6172 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf));
6174 ptype = ntohs(phdr->param_type);
6175 plen = ntohs(phdr->param_length);
6177 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6178 * (uint32_t)ptype, (int)plen);
6180 if (offset + plen > limit) {
6183 if (plen < sizeof(struct sctp_paramhdr)) {
6187 if (ptype == SCTP_IPV4_ADDRESS) {
6188 if (stcb->asoc.scope.ipv4_addr_legal) {
6189 struct sctp_ipv4addr_param *p4, p4_buf;
6191 /* ok get the v4 address and check/add */
6192 phdr = sctp_get_next_param(m, offset,
6193 (struct sctp_paramhdr *)&p4_buf,
6195 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6199 p4 = (struct sctp_ipv4addr_param *)phdr;
6200 sin.sin_addr.s_addr = p4->addr;
6201 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6202 /* Skip multi-cast addresses */
6205 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6206 (sin.sin_addr.s_addr == INADDR_ANY)) {
6209 sa = (struct sockaddr *)&sin;
6210 inp = stcb->sctp_ep;
6211 atomic_add_int(&stcb->asoc.refcnt, 1);
6212 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6214 atomic_add_int(&stcb->asoc.refcnt, -1);
6216 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6218 /* we must add the source address */
6220 * no scope set since we have a tcb
6225 * we must validate the state again
6229 if (stcb->asoc.state == 0) {
6230 /* the assoc was freed? */
6233 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6236 } else if (stcb_tmp == stcb) {
6237 if (stcb->asoc.state == 0) {
6238 /* the assoc was freed? */
6244 ~SCTP_ADDR_NOT_IN_ASSOC;
6248 * strange, address is in another
6249 * assoc? straighten out locks.
6252 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6253 struct mbuf *op_err;
6254 char msg[SCTP_DIAG_INFO_LEN];
6260 SCTP_SNPRINTF(msg, sizeof(msg),
6261 "%s:%d at %s", __FILE__, __LINE__, __func__);
6262 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6264 sctp_abort_an_association(stcb_tmp->sctp_ep,
6266 SCTP_SO_NOT_LOCKED);
6269 SCTP_TCB_UNLOCK(stcb_tmp);
6272 if (stcb->asoc.state == 0) {
6273 /* the assoc was freed? */
6282 if (ptype == SCTP_IPV6_ADDRESS) {
6283 if (stcb->asoc.scope.ipv6_addr_legal) {
6284 /* ok get the v6 address and check/add */
6285 struct sctp_ipv6addr_param *p6, p6_buf;
6287 phdr = sctp_get_next_param(m, offset,
6288 (struct sctp_paramhdr *)&p6_buf,
6290 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6294 p6 = (struct sctp_ipv6addr_param *)phdr;
6295 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6297 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6298 /* Skip multi-cast addresses */
6301 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6303 * Link local make no sense without
6308 sa = (struct sockaddr *)&sin6;
6309 inp = stcb->sctp_ep;
6310 atomic_add_int(&stcb->asoc.refcnt, 1);
6311 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6313 atomic_add_int(&stcb->asoc.refcnt, -1);
6314 if (stcb_tmp == NULL &&
6315 (inp == stcb->sctp_ep || inp == NULL)) {
6317 * we must validate the state again
6321 if (stcb->asoc.state == 0) {
6322 /* the assoc was freed? */
6326 * we must add the address, no scope
6329 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6332 } else if (stcb_tmp == stcb) {
6334 * we must validate the state again
6337 if (stcb->asoc.state == 0) {
6338 /* the assoc was freed? */
6344 ~SCTP_ADDR_NOT_IN_ASSOC;
6348 * strange, address is in another
6349 * assoc? straighten out locks.
6352 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6353 struct mbuf *op_err;
6354 char msg[SCTP_DIAG_INFO_LEN];
6360 SCTP_SNPRINTF(msg, sizeof(msg),
6361 "%s:%d at %s", __FILE__, __LINE__, __func__);
6362 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6364 sctp_abort_an_association(stcb_tmp->sctp_ep,
6366 SCTP_SO_NOT_LOCKED);
6369 SCTP_TCB_UNLOCK(stcb_tmp);
6371 if (stcb->asoc.state == 0) {
6372 /* the assoc was freed? */
6380 if (ptype == SCTP_ECN_CAPABLE) {
6381 peer_supports_ecn = 1;
6382 } else if (ptype == SCTP_ULP_ADAPTATION) {
6383 if (stcb->asoc.state != SCTP_STATE_OPEN) {
6384 struct sctp_adaptation_layer_indication ai,
6387 phdr = sctp_get_next_param(m, offset,
6388 (struct sctp_paramhdr *)&ai, sizeof(ai));
6389 aip = (struct sctp_adaptation_layer_indication *)phdr;
6391 stcb->asoc.peers_adaptation = ntohl(aip->indication);
6392 stcb->asoc.adaptation_needed = 1;
6395 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6396 struct sctp_asconf_addr_param lstore, *fee;
6398 struct sockaddr *lsa = NULL;
6400 struct sctp_asconf_addrv4_param *fii;
6403 if (stcb->asoc.asconf_supported == 0) {
6406 if (plen > sizeof(lstore)) {
6409 if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6412 phdr = sctp_get_next_param(m, offset,
6413 (struct sctp_paramhdr *)&lstore,
6418 fee = (struct sctp_asconf_addr_param *)phdr;
6419 lptype = ntohs(fee->addrp.ph.param_type);
6422 case SCTP_IPV4_ADDRESS:
6424 sizeof(struct sctp_asconf_addrv4_param)) {
6425 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6426 (int)sizeof(struct sctp_asconf_addrv4_param),
6429 fii = (struct sctp_asconf_addrv4_param *)fee;
6430 sin.sin_addr.s_addr = fii->addrp.addr;
6431 lsa = (struct sockaddr *)&sin;
6436 case SCTP_IPV6_ADDRESS:
6438 sizeof(struct sctp_asconf_addr_param)) {
6439 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6440 (int)sizeof(struct sctp_asconf_addr_param),
6443 memcpy(sin6.sin6_addr.s6_addr,
6445 sizeof(fee->addrp.addr));
6446 lsa = (struct sockaddr *)&sin6;
6454 (void)sctp_set_primary_addr(stcb, sa, NULL);
6456 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6457 stcb->asoc.peer_supports_nat = 1;
6458 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6459 /* Peer supports pr-sctp */
6460 peer_supports_prsctp = 1;
6461 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6462 /* A supported extension chunk */
6463 struct sctp_supported_chunk_types_param *pr_supported;
6464 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6467 if (plen > sizeof(local_store)) {
6470 phdr = sctp_get_next_param(m, offset,
6471 (struct sctp_paramhdr *)&local_store, plen);
6475 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6476 num_ent = plen - sizeof(struct sctp_paramhdr);
6477 for (i = 0; i < num_ent; i++) {
6478 switch (pr_supported->chunk_types[i]) {
6480 peer_supports_asconf = 1;
6482 case SCTP_ASCONF_ACK:
6483 peer_supports_asconf_ack = 1;
6485 case SCTP_FORWARD_CUM_TSN:
6486 peer_supports_prsctp = 1;
6488 case SCTP_PACKET_DROPPED:
6489 peer_supports_pktdrop = 1;
6491 case SCTP_NR_SELECTIVE_ACK:
6492 peer_supports_nrsack = 1;
6494 case SCTP_STREAM_RESET:
6495 peer_supports_reconfig = 1;
6497 case SCTP_AUTHENTICATION:
6498 peer_supports_auth = 1;
6501 peer_supports_idata = 1;
6504 /* one I have not learned yet */
6509 } else if (ptype == SCTP_RANDOM) {
6510 if (plen > sizeof(random_store))
6513 /* already processed a RANDOM */
6516 phdr = sctp_get_next_param(m, offset,
6517 (struct sctp_paramhdr *)random_store,
6521 p_random = (struct sctp_auth_random *)phdr;
6522 random_len = plen - sizeof(*p_random);
6523 /* enforce the random length */
6524 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6525 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6529 } else if (ptype == SCTP_HMAC_LIST) {
6533 if (plen > sizeof(hmacs_store))
6536 /* already processed a HMAC list */
6539 phdr = sctp_get_next_param(m, offset,
6540 (struct sctp_paramhdr *)hmacs_store,
6544 hmacs = (struct sctp_auth_hmac_algo *)phdr;
6545 hmacs_len = plen - sizeof(*hmacs);
6546 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6547 /* validate the hmac list */
6548 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6551 if (stcb->asoc.peer_hmacs != NULL)
6552 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6553 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6554 if (stcb->asoc.peer_hmacs != NULL) {
6555 for (i = 0; i < num_hmacs; i++) {
6556 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6557 ntohs(hmacs->hmac_ids[i]));
6561 } else if (ptype == SCTP_CHUNK_LIST) {
6564 if (plen > sizeof(chunks_store))
6567 /* already processed a Chunks list */
6570 phdr = sctp_get_next_param(m, offset,
6571 (struct sctp_paramhdr *)chunks_store,
6575 chunks = (struct sctp_auth_chunk_list *)phdr;
6576 num_chunks = plen - sizeof(*chunks);
6577 if (stcb->asoc.peer_auth_chunks != NULL)
6578 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6580 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6581 for (i = 0; i < num_chunks; i++) {
6582 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6583 stcb->asoc.peer_auth_chunks);
6584 /* record asconf/asconf-ack if listed */
6585 if (chunks->chunk_types[i] == SCTP_ASCONF)
6587 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6592 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6593 (ptype == SCTP_STATE_COOKIE) ||
6594 (ptype == SCTP_UNRECOG_PARAM) ||
6595 (ptype == SCTP_COOKIE_PRESERVE) ||
6596 (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6597 (ptype == SCTP_ADD_IP_ADDRESS) ||
6598 (ptype == SCTP_DEL_IP_ADDRESS) ||
6599 (ptype == SCTP_ERROR_CAUSE_IND) ||
6600 (ptype == SCTP_SUCCESS_REPORT)) {
6603 if ((ptype & 0x8000) == 0x0000) {
6605 * must stop processing the rest of the
6606 * param's. Any report bits were handled
6608 * sctp_arethere_unrecognized_parameters()
6609 * when the INIT or INIT-ACK was first seen.
6616 offset += SCTP_SIZE32(plen);
6617 if (offset >= limit) {
6620 phdr = sctp_get_next_param(m, offset, ¶m_buf,
6623 /* Now check to see if we need to purge any addresses */
6624 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6625 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6626 SCTP_ADDR_NOT_IN_ASSOC) {
6627 /* This address has been removed from the asoc */
6628 /* remove and free it */
6629 stcb->asoc.numnets--;
6630 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6631 sctp_free_remote_addr(net);
6632 if (net == stcb->asoc.primary_destination) {
6633 stcb->asoc.primary_destination = NULL;
6634 sctp_select_primary_destination(stcb);
6638 if ((stcb->asoc.ecn_supported == 1) &&
6639 (peer_supports_ecn == 0)) {
6640 stcb->asoc.ecn_supported = 0;
6642 if ((stcb->asoc.prsctp_supported == 1) &&
6643 (peer_supports_prsctp == 0)) {
6644 stcb->asoc.prsctp_supported = 0;
6646 if ((stcb->asoc.auth_supported == 1) &&
6647 ((peer_supports_auth == 0) ||
6648 (got_random == 0) || (got_hmacs == 0))) {
6649 stcb->asoc.auth_supported = 0;
6651 if ((stcb->asoc.asconf_supported == 1) &&
6652 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6653 (stcb->asoc.auth_supported == 0) ||
6654 (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6655 stcb->asoc.asconf_supported = 0;
6657 if ((stcb->asoc.reconfig_supported == 1) &&
6658 (peer_supports_reconfig == 0)) {
6659 stcb->asoc.reconfig_supported = 0;
6661 if ((stcb->asoc.idata_supported == 1) &&
6662 (peer_supports_idata == 0)) {
6663 stcb->asoc.idata_supported = 0;
6665 if ((stcb->asoc.nrsack_supported == 1) &&
6666 (peer_supports_nrsack == 0)) {
6667 stcb->asoc.nrsack_supported = 0;
6669 if ((stcb->asoc.pktdrop_supported == 1) &&
6670 (peer_supports_pktdrop == 0)) {
6671 stcb->asoc.pktdrop_supported = 0;
6673 /* validate authentication required parameters */
6674 if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6675 /* peer does not support auth but sent a chunks list? */
6678 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6679 /* peer supports asconf but not auth? */
6681 } else if ((peer_supports_asconf == 1) &&
6682 (peer_supports_auth == 1) &&
6683 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6686 /* concatenate the full random key */
6687 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6688 if (chunks != NULL) {
6689 keylen += sizeof(*chunks) + num_chunks;
6691 new_key = sctp_alloc_key(keylen);
6692 if (new_key != NULL) {
6693 /* copy in the RANDOM */
6694 if (p_random != NULL) {
6695 keylen = sizeof(*p_random) + random_len;
6696 memcpy(new_key->key, p_random, keylen);
6700 /* append in the AUTH chunks */
6701 if (chunks != NULL) {
6702 memcpy(new_key->key + keylen, chunks,
6703 sizeof(*chunks) + num_chunks);
6704 keylen += sizeof(*chunks) + num_chunks;
6706 /* append in the HMACs */
6707 if (hmacs != NULL) {
6708 memcpy(new_key->key + keylen, hmacs,
6709 sizeof(*hmacs) + hmacs_len);
6712 /* failed to get memory for the key */
6715 if (stcb->asoc.authinfo.peer_random != NULL)
6716 sctp_free_key(stcb->asoc.authinfo.peer_random);
6717 stcb->asoc.authinfo.peer_random = new_key;
6718 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6719 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6725 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6726 struct sctp_nets *net)
6728 /* make sure the requested primary address exists in the assoc */
6729 if (net == NULL && sa)
6730 net = sctp_findnet(stcb, sa);
6733 /* didn't find the requested primary address! */
6736 /* set the primary address */
6737 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6738 /* Must be confirmed, so queue to set */
6739 net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6742 stcb->asoc.primary_destination = net;
6743 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6744 sctp_free_remote_addr(stcb->asoc.alternate);
6745 stcb->asoc.alternate = NULL;
6747 net = TAILQ_FIRST(&stcb->asoc.nets);
6748 if (net != stcb->asoc.primary_destination) {
6750 * first one on the list is NOT the primary
6751 * sctp_cmpaddr() is much more efficient if the
6752 * primary is the first on the list, make it so.
6754 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6755 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6762 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6765 * This function serves two purposes. It will see if a TAG can be
6766 * re-used and return 1 for yes it is ok and 0 for don't use that
6767 * tag. A secondary function it will do is purge out old tags that
6770 struct sctpvtaghead *chain;
6771 struct sctp_tagblock *twait_block;
6772 struct sctpasochead *head;
6773 struct sctp_tcb *stcb;
6776 SCTP_INP_INFO_RLOCK();
6777 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6778 SCTP_BASE_INFO(hashasocmark))];
6779 LIST_FOREACH(stcb, head, sctp_asocs) {
6781 * We choose not to lock anything here. TCB's can't be
6782 * removed since we have the read lock, so they can't be
6783 * freed on us, same thing for the INP. I may be wrong with
6784 * this assumption, but we will go with it for now :-)
6786 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6789 if (stcb->asoc.my_vtag == tag) {
6791 if (stcb->rport != rport) {
6794 if (stcb->sctp_ep->sctp_lport != lport) {
6797 /* Its a used tag set */
6798 SCTP_INP_INFO_RUNLOCK();
6802 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6803 /* Now what about timed wait ? */
6804 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6806 * Block(s) are present, lets see if we have this tag in the
6809 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6810 if (twait_block->vtag_block[i].v_tag == 0) {
6813 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6815 /* Audit expires this guy */
6816 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6817 twait_block->vtag_block[i].v_tag = 0;
6818 twait_block->vtag_block[i].lport = 0;
6819 twait_block->vtag_block[i].rport = 0;
6820 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6821 (twait_block->vtag_block[i].lport == lport) &&
6822 (twait_block->vtag_block[i].rport == rport)) {
6823 /* Bad tag, sorry :< */
6824 SCTP_INP_INFO_RUNLOCK();
6829 SCTP_INP_INFO_RUNLOCK();
6834 sctp_drain_mbufs(struct sctp_tcb *stcb)
6837 * We must hunt this association for MBUF's past the cumack (i.e.
6838 * out of order data that we can renege on).
6840 struct sctp_association *asoc;
6841 struct sctp_tmit_chunk *chk, *nchk;
6842 uint32_t cumulative_tsn_p1;
6843 struct sctp_queued_to_read *control, *ncontrol;
6848 /* We look for anything larger than the cum-ack + 1 */
6851 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6852 /* none we can reneg on. */
6855 SCTP_STAT_INCR(sctps_protocol_drains_done);
6856 cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6858 /* Ok that was fun, now we will drain all the inbound streams? */
6859 for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6860 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6862 if (control->on_strm_q != SCTP_ON_ORDERED) {
6863 panic("Huh control: %p on_q: %d -- not ordered?",
6864 control, control->on_strm_q);
6867 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6868 /* Yep it is above cum-ack */
6870 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6871 KASSERT(control->length > 0, ("control has zero length"));
6872 if (asoc->size_on_all_streams >= control->length) {
6873 asoc->size_on_all_streams -= control->length;
6876 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6878 asoc->size_on_all_streams = 0;
6881 sctp_ucount_decr(asoc->cnt_on_all_streams);
6882 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6883 if (control->on_read_q) {
6884 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6885 control->on_read_q = 0;
6887 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6888 control->on_strm_q = 0;
6889 if (control->data) {
6890 sctp_m_freem(control->data);
6891 control->data = NULL;
6893 sctp_free_remote_addr(control->whoFrom);
6894 /* Now its reasm? */
6895 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6897 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6898 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6899 if (asoc->size_on_reasm_queue >= chk->send_size) {
6900 asoc->size_on_reasm_queue -= chk->send_size;
6903 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6905 asoc->size_on_reasm_queue = 0;
6908 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6909 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6910 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6912 sctp_m_freem(chk->data);
6915 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6917 sctp_free_a_readq(stcb, control);
6920 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6922 if (control->on_strm_q != SCTP_ON_UNORDERED) {
6923 panic("Huh control: %p on_q: %d -- not unordered?",
6924 control, control->on_strm_q);
6927 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6928 /* Yep it is above cum-ack */
6930 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6931 KASSERT(control->length > 0, ("control has zero length"));
6932 if (asoc->size_on_all_streams >= control->length) {
6933 asoc->size_on_all_streams -= control->length;
6936 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6938 asoc->size_on_all_streams = 0;
6941 sctp_ucount_decr(asoc->cnt_on_all_streams);
6942 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6943 if (control->on_read_q) {
6944 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6945 control->on_read_q = 0;
6947 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6948 control->on_strm_q = 0;
6949 if (control->data) {
6950 sctp_m_freem(control->data);
6951 control->data = NULL;
6953 sctp_free_remote_addr(control->whoFrom);
6954 /* Now its reasm? */
6955 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6957 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6958 KASSERT(chk->send_size > 0, ("chunk has zero length"));
6959 if (asoc->size_on_reasm_queue >= chk->send_size) {
6960 asoc->size_on_reasm_queue -= chk->send_size;
6963 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6965 asoc->size_on_reasm_queue = 0;
6968 sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6969 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6970 TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6972 sctp_m_freem(chk->data);
6975 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6977 sctp_free_a_readq(stcb, control);
6982 /* We must back down to see what the new highest is */
6983 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6984 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6985 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6986 asoc->highest_tsn_inside_map = i;
6992 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6996 * Question, should we go through the delivery queue? The
6997 * only reason things are on here is the app not reading OR
6998 * a p-d-api up. An attacker COULD send enough in to
6999 * initiate the PD-API and then send a bunch of stuff to
7000 * other streams... these would wind up on the delivery
7001 * queue.. and then we would not get to them. But in order
7002 * to do this I then have to back-track and un-deliver
7003 * sequence numbers in streams.. el-yucko. I think for now
7004 * we will NOT look at the delivery queue and leave it to be
7005 * something to consider later. An alternative would be to
7006 * abort the P-D-API with a notification and then deliver
7007 * the data.... Or another method might be to keep track of
7008 * how many times the situation occurs and if we see a
7009 * possible attack underway just abort the association.
7012 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7015 * Now do we need to find a new
7016 * asoc->highest_tsn_inside_map?
7018 asoc->last_revoke_count = cnt;
7019 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
7020 SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
7021 /* sa_ignore NO_NULL_CHK */
7022 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7023 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7026 * Another issue, in un-setting the TSN's in the mapping array we
7027 * DID NOT adjust the highest_tsn marker. This will cause one of
7028 * two things to occur. It may cause us to do extra work in checking
7029 * for our mapping array movement. More importantly it may cause us
7030 * to SACK every datagram. This may not be a bad thing though since
7031 * we will recover once we get our cum-ack above and all this stuff
7032 * we dumped recovered.
7040 * We must walk the PCB lists for ALL associations here. The system
7041 * is LOW on MBUF's and needs help. This is where reneging will
7042 * occur. We really hope this does NOT happen!
7044 VNET_ITERATOR_DECL(vnet_iter);
7045 VNET_LIST_RLOCK_NOSLEEP();
7046 VNET_FOREACH(vnet_iter) {
7047 CURVNET_SET(vnet_iter);
7048 struct sctp_inpcb *inp;
7049 struct sctp_tcb *stcb;
7051 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7052 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7059 SCTP_INP_INFO_RLOCK();
7060 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7061 /* For each endpoint */
7062 SCTP_INP_RLOCK(inp);
7063 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7064 /* For each association */
7065 SCTP_TCB_LOCK(stcb);
7066 sctp_drain_mbufs(stcb);
7067 SCTP_TCB_UNLOCK(stcb);
7069 SCTP_INP_RUNLOCK(inp);
7071 SCTP_INP_INFO_RUNLOCK();
7074 VNET_LIST_RUNLOCK_NOSLEEP();
7078 * start a new iterator
7079 * iterates through all endpoints and associations based on the pcb_state
7080 * flags and asoc_state. "af" (mandatory) is executed for all matching
7081 * assocs and "ef" (optional) is executed when the iterator completes.
7082 * "inpf" (optional) is executed for each new endpoint as it is being
7083 * iterated through. inpe (optional) is called when the inp completes
7084 * its way through all the stcbs.
7087 sctp_initiate_iterator(inp_func inpf,
7091 uint32_t pcb_features,
7092 uint32_t asoc_state,
7096 struct sctp_inpcb *s_inp,
7097 uint8_t chunk_output_off)
7099 struct sctp_iterator *it = NULL;
7104 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7105 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7106 SCTP_BASE_VAR(sctp_pcb_initialized));
7109 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7112 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7115 memset(it, 0, sizeof(*it));
7116 it->function_assoc = af;
7117 it->function_inp = inpf;
7119 it->done_current_ep = 0;
7121 it->done_current_ep = 1;
7122 it->function_atend = ef;
7125 it->pcb_flags = pcb_state;
7126 it->pcb_features = pcb_features;
7127 it->asoc_state = asoc_state;
7128 it->function_inp_end = inpe;
7129 it->no_chunk_output = chunk_output_off;
7132 /* Assume lock is held here */
7134 SCTP_INP_INCR_REF(it->inp);
7135 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7137 SCTP_INP_INFO_RLOCK();
7138 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7140 SCTP_INP_INCR_REF(it->inp);
7142 SCTP_INP_INFO_RUNLOCK();
7143 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7146 SCTP_IPI_ITERATOR_WQ_LOCK();
7147 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7148 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7149 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7150 SCTP_BASE_VAR(sctp_pcb_initialized), it);
7151 SCTP_FREE(it, SCTP_M_ITER);
7154 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7155 if (sctp_it_ctl.iterator_running == 0) {
7156 sctp_wakeup_iterator();
7158 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7159 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */