xref: /freebsd/sys/netinet/sctp_pcb.c (revision 273c26a3c3bea87a241d6879abd4f991db180bf0)
1 /*-
2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * a) Redistributions of source code must retain the above copyright notice,
10  *    this list of conditions and the following disclaimer.
11  *
12  * b) Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in
14  *    the documentation and/or other materials provided with the distribution.
15  *
16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
17  *    contributors may be used to endorse or promote products derived
18  *    from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35 
36 #include <netinet/sctp_os.h>
37 #include <sys/proc.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_pcb.h>
41 #include <netinet/sctputil.h>
42 #include <netinet/sctp.h>
43 #include <netinet/sctp_header.h>
44 #include <netinet/sctp_asconf.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_timer.h>
47 #include <netinet/sctp_bsd_addr.h>
48 #include <netinet/sctp_dtrace_define.h>
49 #if defined(INET) || defined(INET6)
50 #include <netinet/udp.h>
51 #endif
52 #ifdef INET6
53 #include <netinet6/ip6_var.h>
54 #endif
55 #include <sys/sched.h>
56 #include <sys/smp.h>
57 #include <sys/unistd.h>
58 
59 
60 VNET_DEFINE(struct sctp_base_info, system_base_info);
61 
62 /* FIX: we don't handle multiple link local scopes */
63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
64 #ifdef INET6
65 int
66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
67 {
68 	struct sockaddr_in6 tmp_a, tmp_b;
69 
70 	memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
71 	if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
72 		return (0);
73 	}
74 	memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
75 	if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
76 		return (0);
77 	}
78 	return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
79 }
80 
81 #endif
82 
83 void
84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
85 {
86 	/*
87 	 * We really don't need to lock this, but I will just because it
88 	 * does not hurt.
89 	 */
90 	SCTP_INP_INFO_RLOCK();
91 	spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
92 	spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
93 	spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
94 	spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
95 	spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
96 	spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
97 	spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
98 	spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
99 	SCTP_INP_INFO_RUNLOCK();
100 }
101 
102 /*-
103  * Addresses are added to VRF's (Virtual Router's). For BSD we
104  * have only the default VRF 0. We maintain a hash list of
105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
106  * these has a list of addresses. When we add a new address
107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
108  * not exist we create it and add it to the list of IFN's
109  * within the VRF. Once we have the sctp_ifn, we add the
110  * address to the list. So we look something like:
111  *
112  * hash-vrf-table
113  *   vrf-> ifn-> ifn -> ifn
114  *   vrf    |
115  *    ...   +--ifa-> ifa -> ifa
116  *   vrf
117  *
118  * We keep these separate lists since the SCTP subsystem will
119  * point to these from its source address selection nets structure.
120  * When an address is deleted it does not happen right away on
121  * the SCTP side, it gets scheduled. What we do when a
122  * delete happens is immediately remove the address from
123  * the master list and decrement the refcount. As our
124  * addip iterator works through and frees the src address
125  * selection pointing to the sctp_ifa, eventually the refcount
126  * will reach 0 and we will delete it. Note that it is assumed
127  * that any locking on system level ifn/ifa is done at the
128  * caller of these functions and these routines will only
129  * lock the SCTP structures as they add or delete things.
130  *
131  * Other notes on VRF concepts.
132  *  - An endpoint can be in multiple VRF's
133  *  - An association lives within a VRF and only one VRF.
134  *  - Any incoming packet we can deduce the VRF for by
135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
136  *  - Any downward send call or connect call must supply the
137  *    VRF via ancillary data or via some sort of set default
138  *    VRF socket option call (again for BSD no brainer since
139  *    the VRF is always 0).
140  *  - An endpoint may add multiple VRF's to it.
141  *  - Listening sockets can accept associations in any
142  *    of the VRF's they are in but the assoc will end up
143  *    in only one VRF (gotten from the packet or connect/send).
144  *
145  */
146 
147 struct sctp_vrf *
148 sctp_allocate_vrf(int vrf_id)
149 {
150 	struct sctp_vrf *vrf = NULL;
151 	struct sctp_vrflist *bucket;
152 
153 	/* First allocate the VRF structure */
154 	vrf = sctp_find_vrf(vrf_id);
155 	if (vrf) {
156 		/* Already allocated */
157 		return (vrf);
158 	}
159 	SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
160 	    SCTP_M_VRF);
161 	if (vrf == NULL) {
162 		/* No memory */
163 #ifdef INVARIANTS
164 		panic("No memory for VRF:%d", vrf_id);
165 #endif
166 		return (NULL);
167 	}
168 	/* setup the VRF */
169 	memset(vrf, 0, sizeof(struct sctp_vrf));
170 	vrf->vrf_id = vrf_id;
171 	LIST_INIT(&vrf->ifnlist);
172 	vrf->total_ifa_count = 0;
173 	vrf->refcount = 0;
174 	/* now also setup table ids */
175 	SCTP_INIT_VRF_TABLEID(vrf);
176 	/* Init the HASH of addresses */
177 	vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
178 	    &vrf->vrf_addr_hashmark);
179 	if (vrf->vrf_addr_hash == NULL) {
180 		/* No memory */
181 #ifdef INVARIANTS
182 		panic("No memory for VRF:%d", vrf_id);
183 #endif
184 		SCTP_FREE(vrf, SCTP_M_VRF);
185 		return (NULL);
186 	}
187 	/* Add it to the hash table */
188 	bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
189 	LIST_INSERT_HEAD(bucket, vrf, next_vrf);
190 	atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
191 	return (vrf);
192 }
193 
194 
195 struct sctp_ifn *
196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
197 {
198 	struct sctp_ifn *sctp_ifnp;
199 	struct sctp_ifnlist *hash_ifn_head;
200 
201 	/*
202 	 * We assume the lock is held for the addresses if that's wrong
203 	 * problems could occur :-)
204 	 */
205 	hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
206 	LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
207 		if (sctp_ifnp->ifn_index == ifn_index) {
208 			return (sctp_ifnp);
209 		}
210 		if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
211 			return (sctp_ifnp);
212 		}
213 	}
214 	return (NULL);
215 }
216 
217 
218 struct sctp_vrf *
219 sctp_find_vrf(uint32_t vrf_id)
220 {
221 	struct sctp_vrflist *bucket;
222 	struct sctp_vrf *liste;
223 
224 	bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
225 	LIST_FOREACH(liste, bucket, next_vrf) {
226 		if (vrf_id == liste->vrf_id) {
227 			return (liste);
228 		}
229 	}
230 	return (NULL);
231 }
232 
233 
234 void
235 sctp_free_vrf(struct sctp_vrf *vrf)
236 {
237 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
238 		if (vrf->vrf_addr_hash) {
239 			SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
240 			vrf->vrf_addr_hash = NULL;
241 		}
242 		/* We zero'd the count */
243 		LIST_REMOVE(vrf, next_vrf);
244 		SCTP_FREE(vrf, SCTP_M_VRF);
245 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
246 	}
247 }
248 
249 
250 void
251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
252 {
253 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
254 		/* We zero'd the count */
255 		if (sctp_ifnp->vrf) {
256 			sctp_free_vrf(sctp_ifnp->vrf);
257 		}
258 		SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
259 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
260 	}
261 }
262 
263 
264 void
265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
266 {
267 	struct sctp_ifn *sctp_ifnp;
268 
269 	sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
270 	if (sctp_ifnp != NULL) {
271 		sctp_ifnp->ifn_mtu = mtu;
272 	}
273 }
274 
275 
276 void
277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
278 {
279 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
280 		/* We zero'd the count */
281 		if (sctp_ifap->ifn_p) {
282 			sctp_free_ifn(sctp_ifap->ifn_p);
283 		}
284 		SCTP_FREE(sctp_ifap, SCTP_M_IFA);
285 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
286 	}
287 }
288 
289 
290 static void
291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
292 {
293 	struct sctp_ifn *found;
294 
295 	found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
296 	if (found == NULL) {
297 		/* Not in the list.. sorry */
298 		return;
299 	}
300 	if (hold_addr_lock == 0)
301 		SCTP_IPI_ADDR_WLOCK();
302 	LIST_REMOVE(sctp_ifnp, next_bucket);
303 	LIST_REMOVE(sctp_ifnp, next_ifn);
304 	SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
305 	    sctp_ifnp->registered_af);
306 	if (hold_addr_lock == 0)
307 		SCTP_IPI_ADDR_WUNLOCK();
308 	/* Take away the reference, and possibly free it */
309 	sctp_free_ifn(sctp_ifnp);
310 }
311 
312 
313 void
314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
315     const char *if_name, uint32_t ifn_index)
316 {
317 	struct sctp_vrf *vrf;
318 	struct sctp_ifa *sctp_ifap;
319 
320 	SCTP_IPI_ADDR_RLOCK();
321 	vrf = sctp_find_vrf(vrf_id);
322 	if (vrf == NULL) {
323 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
324 		goto out;
325 
326 	}
327 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
328 	if (sctp_ifap == NULL) {
329 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
330 		goto out;
331 	}
332 	if (sctp_ifap->ifn_p == NULL) {
333 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
334 		goto out;
335 	}
336 	if (if_name) {
337 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
338 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
339 			    sctp_ifap->ifn_p->ifn_name, if_name);
340 			goto out;
341 		}
342 	} else {
343 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
344 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
345 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
346 			goto out;
347 		}
348 	}
349 
350 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
351 	sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
352 out:
353 	SCTP_IPI_ADDR_RUNLOCK();
354 }
355 
356 
357 void
358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
359     const char *if_name, uint32_t ifn_index)
360 {
361 	struct sctp_vrf *vrf;
362 	struct sctp_ifa *sctp_ifap;
363 
364 	SCTP_IPI_ADDR_RLOCK();
365 	vrf = sctp_find_vrf(vrf_id);
366 	if (vrf == NULL) {
367 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
368 		goto out;
369 
370 	}
371 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
372 	if (sctp_ifap == NULL) {
373 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
374 		goto out;
375 	}
376 	if (sctp_ifap->ifn_p == NULL) {
377 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
378 		goto out;
379 	}
380 	if (if_name) {
381 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
382 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
383 			    sctp_ifap->ifn_p->ifn_name, if_name);
384 			goto out;
385 		}
386 	} else {
387 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
388 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
389 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
390 			goto out;
391 		}
392 	}
393 
394 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
395 	sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
396 out:
397 	SCTP_IPI_ADDR_RUNLOCK();
398 }
399 
400 
401 /*-
402  * Add an ifa to an ifn.
403  * Register the interface as necessary.
404  * NOTE: ADDR write lock MUST be held.
405  */
406 static void
407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
408 {
409 	int ifa_af;
410 
411 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
412 	sctp_ifap->ifn_p = sctp_ifnp;
413 	atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
414 	/* update address counts */
415 	sctp_ifnp->ifa_count++;
416 	ifa_af = sctp_ifap->address.sa.sa_family;
417 	switch (ifa_af) {
418 #ifdef INET
419 	case AF_INET:
420 		sctp_ifnp->num_v4++;
421 		break;
422 #endif
423 #ifdef INET6
424 	case AF_INET6:
425 		sctp_ifnp->num_v6++;
426 		break;
427 #endif
428 	default:
429 		break;
430 	}
431 	if (sctp_ifnp->ifa_count == 1) {
432 		/* register the new interface */
433 		SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
434 		sctp_ifnp->registered_af = ifa_af;
435 	}
436 }
437 
438 
439 /*-
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.
444  */
445 static void
446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
447 {
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) {
453 #ifdef INET
454 		case AF_INET:
455 			sctp_ifap->ifn_p->num_v4--;
456 			break;
457 #endif
458 #ifdef INET6
459 		case AF_INET6:
460 			sctp_ifap->ifn_p->num_v6--;
461 			break;
462 #endif
463 		default:
464 			break;
465 		}
466 
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);
470 		} else {
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_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
475 				SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
476 				sctp_ifap->ifn_p->registered_af = AF_INET;
477 			} else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
478 			    (sctp_ifap->ifn_p->registered_af == AF_INET)) {
479 				SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
480 				SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
481 				sctp_ifap->ifn_p->registered_af = AF_INET6;
482 			}
483 			/* free the ifn refcount */
484 			sctp_free_ifn(sctp_ifap->ifn_p);
485 		}
486 		sctp_ifap->ifn_p = NULL;
487 	}
488 }
489 
490 
491 struct sctp_ifa *
492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
493     uint32_t ifn_type, const char *if_name, void *ifa,
494     struct sockaddr *addr, uint32_t ifa_flags,
495     int dynamic_add)
496 {
497 	struct sctp_vrf *vrf;
498 	struct sctp_ifn *sctp_ifnp = NULL;
499 	struct sctp_ifa *sctp_ifap = NULL;
500 	struct sctp_ifalist *hash_addr_head;
501 	struct sctp_ifnlist *hash_ifn_head;
502 	uint32_t hash_of_addr;
503 	int new_ifn_af = 0;
504 
505 #ifdef SCTP_DEBUG
506 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
507 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
508 #endif
509 	SCTP_IPI_ADDR_WLOCK();
510 	sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
511 	if (sctp_ifnp) {
512 		vrf = sctp_ifnp->vrf;
513 	} else {
514 		vrf = sctp_find_vrf(vrf_id);
515 		if (vrf == NULL) {
516 			vrf = sctp_allocate_vrf(vrf_id);
517 			if (vrf == NULL) {
518 				SCTP_IPI_ADDR_WUNLOCK();
519 				return (NULL);
520 			}
521 		}
522 	}
523 	if (sctp_ifnp == NULL) {
524 		/*
525 		 * build one and add it, can't hold lock until after malloc
526 		 * done though.
527 		 */
528 		SCTP_IPI_ADDR_WUNLOCK();
529 		SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
530 		    sizeof(struct sctp_ifn), SCTP_M_IFN);
531 		if (sctp_ifnp == NULL) {
532 #ifdef INVARIANTS
533 			panic("No memory for IFN");
534 #endif
535 			return (NULL);
536 		}
537 		memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
538 		sctp_ifnp->ifn_index = ifn_index;
539 		sctp_ifnp->ifn_p = ifn;
540 		sctp_ifnp->ifn_type = ifn_type;
541 		sctp_ifnp->refcount = 0;
542 		sctp_ifnp->vrf = vrf;
543 		atomic_add_int(&vrf->refcount, 1);
544 		sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
545 		if (if_name != NULL) {
546 			snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
547 		} else {
548 			snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
549 		}
550 		hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
551 		LIST_INIT(&sctp_ifnp->ifalist);
552 		SCTP_IPI_ADDR_WLOCK();
553 		LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
554 		LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
555 		atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
556 		new_ifn_af = 1;
557 	}
558 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
559 	if (sctp_ifap) {
560 		/* Hmm, it already exists? */
561 		if ((sctp_ifap->ifn_p) &&
562 		    (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
563 			SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
564 			    sctp_ifap->ifn_p->ifn_name, ifn_index,
565 			    (void *)sctp_ifap);
566 			if (new_ifn_af) {
567 				/* Remove the created one that we don't want */
568 				sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
569 			}
570 			if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
571 				/* easy to solve, just switch back to active */
572 				SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
573 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
574 				sctp_ifap->ifn_p = sctp_ifnp;
575 				atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
576 			}
577 	exit_stage_left:
578 			SCTP_IPI_ADDR_WUNLOCK();
579 			return (sctp_ifap);
580 		} else {
581 			if (sctp_ifap->ifn_p) {
582 				/*
583 				 * The last IFN gets the address, remove the
584 				 * old one
585 				 */
586 				SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
587 				    (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
588 				    sctp_ifap->ifn_p->ifn_index, if_name,
589 				    ifn_index);
590 				/* remove the address from the old ifn */
591 				sctp_remove_ifa_from_ifn(sctp_ifap);
592 				/* move the address over to the new ifn */
593 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
594 				goto exit_stage_left;
595 			} else {
596 				/* repair ifnp which was NULL ? */
597 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
598 				SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
599 				    (void *)sctp_ifnp, (void *)sctp_ifap);
600 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
601 			}
602 			goto exit_stage_left;
603 		}
604 	}
605 	SCTP_IPI_ADDR_WUNLOCK();
606 	SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
607 	if (sctp_ifap == NULL) {
608 #ifdef INVARIANTS
609 		panic("No memory for IFA");
610 #endif
611 		return (NULL);
612 	}
613 	memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
614 	sctp_ifap->ifn_p = sctp_ifnp;
615 	atomic_add_int(&sctp_ifnp->refcount, 1);
616 	sctp_ifap->vrf_id = vrf_id;
617 	sctp_ifap->ifa = ifa;
618 	memcpy(&sctp_ifap->address, addr, addr->sa_len);
619 	sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
620 	sctp_ifap->flags = ifa_flags;
621 	/* Set scope */
622 	switch (sctp_ifap->address.sa.sa_family) {
623 #ifdef INET
624 	case AF_INET:
625 		{
626 			struct sockaddr_in *sin;
627 
628 			sin = &sctp_ifap->address.sin;
629 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
630 			    (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
631 				sctp_ifap->src_is_loop = 1;
632 			}
633 			if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
634 				sctp_ifap->src_is_priv = 1;
635 			}
636 			sctp_ifnp->num_v4++;
637 			if (new_ifn_af)
638 				new_ifn_af = AF_INET;
639 			break;
640 		}
641 #endif
642 #ifdef INET6
643 	case AF_INET6:
644 		{
645 			/* ok to use deprecated addresses? */
646 			struct sockaddr_in6 *sin6;
647 
648 			sin6 = &sctp_ifap->address.sin6;
649 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
650 			    (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
651 				sctp_ifap->src_is_loop = 1;
652 			}
653 			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
654 				sctp_ifap->src_is_priv = 1;
655 			}
656 			sctp_ifnp->num_v6++;
657 			if (new_ifn_af)
658 				new_ifn_af = AF_INET6;
659 			break;
660 		}
661 #endif
662 	default:
663 		new_ifn_af = 0;
664 		break;
665 	}
666 	hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
667 
668 	if ((sctp_ifap->src_is_priv == 0) &&
669 	    (sctp_ifap->src_is_loop == 0)) {
670 		sctp_ifap->src_is_glob = 1;
671 	}
672 	SCTP_IPI_ADDR_WLOCK();
673 	hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
674 	LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
675 	sctp_ifap->refcount = 1;
676 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
677 	sctp_ifnp->ifa_count++;
678 	vrf->total_ifa_count++;
679 	atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
680 	if (new_ifn_af) {
681 		SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
682 		sctp_ifnp->registered_af = new_ifn_af;
683 	}
684 	SCTP_IPI_ADDR_WUNLOCK();
685 	if (dynamic_add) {
686 		/*
687 		 * Bump up the refcount so that when the timer completes it
688 		 * will drop back down.
689 		 */
690 		struct sctp_laddr *wi;
691 
692 		atomic_add_int(&sctp_ifap->refcount, 1);
693 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
694 		if (wi == NULL) {
695 			/*
696 			 * Gak, what can we do? We have lost an address
697 			 * change can you say HOSED?
698 			 */
699 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
700 			/* Opps, must decrement the count */
701 			sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
702 			    if_name);
703 			return (NULL);
704 		}
705 		SCTP_INCR_LADDR_COUNT();
706 		bzero(wi, sizeof(*wi));
707 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
708 		wi->ifa = sctp_ifap;
709 		wi->action = SCTP_ADD_IP_ADDRESS;
710 
711 		SCTP_WQ_ADDR_LOCK();
712 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
713 		SCTP_WQ_ADDR_UNLOCK();
714 
715 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
716 		    (struct sctp_inpcb *)NULL,
717 		    (struct sctp_tcb *)NULL,
718 		    (struct sctp_nets *)NULL);
719 	} else {
720 		/* it's ready for use */
721 		sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
722 	}
723 	return (sctp_ifap);
724 }
725 
726 void
727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
728     uint32_t ifn_index, const char *if_name)
729 {
730 	struct sctp_vrf *vrf;
731 	struct sctp_ifa *sctp_ifap = NULL;
732 
733 	SCTP_IPI_ADDR_WLOCK();
734 	vrf = sctp_find_vrf(vrf_id);
735 	if (vrf == NULL) {
736 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
737 		goto out_now;
738 	}
739 #ifdef SCTP_DEBUG
740 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
741 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
742 #endif
743 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
744 	if (sctp_ifap) {
745 		/* Validate the delete */
746 		if (sctp_ifap->ifn_p) {
747 			int valid = 0;
748 
749 			/*-
750 			 * The name has priority over the ifn_index
751 			 * if its given. We do this especially for
752 			 * panda who might recycle indexes fast.
753 			 */
754 			if (if_name) {
755 				if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
756 					/* They match its a correct delete */
757 					valid = 1;
758 				}
759 			}
760 			if (!valid) {
761 				/* last ditch check ifn_index */
762 				if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
763 					valid = 1;
764 				}
765 			}
766 			if (!valid) {
767 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
768 				    ifn_index, ((if_name == NULL) ? "NULL" : if_name));
769 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
770 				    sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
771 				SCTP_IPI_ADDR_WUNLOCK();
772 				return;
773 			}
774 		}
775 		SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
776 		sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
777 		/*
778 		 * We don't set the flag. This means that the structure will
779 		 * hang around in EP's that have bound specific to it until
780 		 * they close. This gives us TCP like behavior if someone
781 		 * removes an address (or for that matter adds it right
782 		 * back).
783 		 */
784 		/* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
785 		vrf->total_ifa_count--;
786 		LIST_REMOVE(sctp_ifap, next_bucket);
787 		sctp_remove_ifa_from_ifn(sctp_ifap);
788 	}
789 #ifdef SCTP_DEBUG
790 	else {
791 		SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
792 		    ifn_index);
793 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
794 	}
795 #endif
796 
797 out_now:
798 	SCTP_IPI_ADDR_WUNLOCK();
799 	if (sctp_ifap) {
800 		struct sctp_laddr *wi;
801 
802 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
803 		if (wi == NULL) {
804 			/*
805 			 * Gak, what can we do? We have lost an address
806 			 * change can you say HOSED?
807 			 */
808 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
809 
810 			/* Oops, must decrement the count */
811 			sctp_free_ifa(sctp_ifap);
812 			return;
813 		}
814 		SCTP_INCR_LADDR_COUNT();
815 		bzero(wi, sizeof(*wi));
816 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
817 		wi->ifa = sctp_ifap;
818 		wi->action = SCTP_DEL_IP_ADDRESS;
819 		SCTP_WQ_ADDR_LOCK();
820 		/*
821 		 * Should this really be a tailq? As it is we will process
822 		 * the newest first :-0
823 		 */
824 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
825 		SCTP_WQ_ADDR_UNLOCK();
826 
827 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
828 		    (struct sctp_inpcb *)NULL,
829 		    (struct sctp_tcb *)NULL,
830 		    (struct sctp_nets *)NULL);
831 	}
832 	return;
833 }
834 
835 
836 static int
837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
838 {
839 	int loopback_scope;
840 
841 #if defined(INET)
842 	int ipv4_local_scope, ipv4_addr_legal;
843 
844 #endif
845 #if defined(INET6)
846 	int local_scope, site_scope, ipv6_addr_legal;
847 
848 #endif
849 	struct sctp_vrf *vrf;
850 	struct sctp_ifn *sctp_ifn;
851 	struct sctp_ifa *sctp_ifa;
852 
853 	loopback_scope = stcb->asoc.scope.loopback_scope;
854 #if defined(INET)
855 	ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
856 	ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
857 #endif
858 #if defined(INET6)
859 	local_scope = stcb->asoc.scope.local_scope;
860 	site_scope = stcb->asoc.scope.site_scope;
861 	ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
862 #endif
863 
864 	SCTP_IPI_ADDR_RLOCK();
865 	vrf = sctp_find_vrf(stcb->asoc.vrf_id);
866 	if (vrf == NULL) {
867 		/* no vrf, no addresses */
868 		SCTP_IPI_ADDR_RUNLOCK();
869 		return (0);
870 	}
871 	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
872 		LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
873 			if ((loopback_scope == 0) &&
874 			    SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
875 				continue;
876 			}
877 			LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
878 				if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
879 				    (!sctp_is_addr_pending(stcb, sctp_ifa))) {
880 					/*
881 					 * We allow pending addresses, where
882 					 * we have sent an asconf-add to be
883 					 * considered valid.
884 					 */
885 					continue;
886 				}
887 				if (sctp_ifa->address.sa.sa_family != to->sa_family) {
888 					continue;
889 				}
890 				switch (sctp_ifa->address.sa.sa_family) {
891 #ifdef INET
892 				case AF_INET:
893 					if (ipv4_addr_legal) {
894 						struct sockaddr_in *sin,
895 						           *rsin;
896 
897 						sin = &sctp_ifa->address.sin;
898 						rsin = (struct sockaddr_in *)to;
899 						if ((ipv4_local_scope == 0) &&
900 						    IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
901 							continue;
902 						}
903 						if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
904 						    &sin->sin_addr) != 0) {
905 							continue;
906 						}
907 						if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
908 							SCTP_IPI_ADDR_RUNLOCK();
909 							return (1);
910 						}
911 					}
912 					break;
913 #endif
914 #ifdef INET6
915 				case AF_INET6:
916 					if (ipv6_addr_legal) {
917 						struct sockaddr_in6 *sin6,
918 						            *rsin6;
919 
920 						sin6 = &sctp_ifa->address.sin6;
921 						rsin6 = (struct sockaddr_in6 *)to;
922 						if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
923 						    &sin6->sin6_addr) != 0) {
924 							continue;
925 						}
926 						if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
927 							if (local_scope == 0)
928 								continue;
929 							if (sin6->sin6_scope_id == 0) {
930 								if (sa6_recoverscope(sin6) != 0)
931 									continue;
932 							}
933 						}
934 						if ((site_scope == 0) &&
935 						    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
936 							continue;
937 						}
938 						if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
939 							SCTP_IPI_ADDR_RUNLOCK();
940 							return (1);
941 						}
942 					}
943 					break;
944 #endif
945 				default:
946 					/* TSNH */
947 					break;
948 				}
949 			}
950 		}
951 	} else {
952 		struct sctp_laddr *laddr;
953 
954 		LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
955 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
956 				SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
957 				continue;
958 			}
959 			if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
960 			    (!sctp_is_addr_pending(stcb, laddr->ifa))) {
961 				/*
962 				 * We allow pending addresses, where we have
963 				 * sent an asconf-add to be considered
964 				 * valid.
965 				 */
966 				continue;
967 			}
968 			if (laddr->ifa->address.sa.sa_family != to->sa_family) {
969 				continue;
970 			}
971 			switch (to->sa_family) {
972 #ifdef INET
973 			case AF_INET:
974 				{
975 					struct sockaddr_in *sin, *rsin;
976 
977 					sin = &laddr->ifa->address.sin;
978 					rsin = (struct sockaddr_in *)to;
979 					if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
980 						SCTP_IPI_ADDR_RUNLOCK();
981 						return (1);
982 					}
983 					break;
984 				}
985 #endif
986 #ifdef INET6
987 			case AF_INET6:
988 				{
989 					struct sockaddr_in6 *sin6, *rsin6;
990 
991 					sin6 = &laddr->ifa->address.sin6;
992 					rsin6 = (struct sockaddr_in6 *)to;
993 					if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
994 						SCTP_IPI_ADDR_RUNLOCK();
995 						return (1);
996 					}
997 					break;
998 				}
999 
1000 #endif
1001 			default:
1002 				/* TSNH */
1003 				break;
1004 			}
1005 
1006 		}
1007 	}
1008 	SCTP_IPI_ADDR_RUNLOCK();
1009 	return (0);
1010 }
1011 
1012 
1013 static struct sctp_tcb *
1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1015     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1016 {
1017 	/**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1018 	/*
1019 	 * If we support the TCP model, then we must now dig through to see
1020 	 * if we can find our endpoint in the list of tcp ep's.
1021 	 */
1022 	uint16_t lport, rport;
1023 	struct sctppcbhead *ephead;
1024 	struct sctp_inpcb *inp;
1025 	struct sctp_laddr *laddr;
1026 	struct sctp_tcb *stcb;
1027 	struct sctp_nets *net;
1028 
1029 	if ((to == NULL) || (from == NULL)) {
1030 		return (NULL);
1031 	}
1032 	switch (to->sa_family) {
1033 #ifdef INET
1034 	case AF_INET:
1035 		if (from->sa_family == AF_INET) {
1036 			lport = ((struct sockaddr_in *)to)->sin_port;
1037 			rport = ((struct sockaddr_in *)from)->sin_port;
1038 		} else {
1039 			return (NULL);
1040 		}
1041 		break;
1042 #endif
1043 #ifdef INET6
1044 	case AF_INET6:
1045 		if (from->sa_family == AF_INET6) {
1046 			lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047 			rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048 		} else {
1049 			return (NULL);
1050 		}
1051 		break;
1052 #endif
1053 	default:
1054 		return (NULL);
1055 	}
1056 	ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057 	/*
1058 	 * Ok now for each of the guys in this bucket we must look and see:
1059 	 * - Does the remote port match. - Does there single association's
1060 	 * addresses match this address (to). If so we update p_ep to point
1061 	 * to this ep and return the tcb from it.
1062 	 */
1063 	LIST_FOREACH(inp, ephead, sctp_hash) {
1064 		SCTP_INP_RLOCK(inp);
1065 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066 			SCTP_INP_RUNLOCK(inp);
1067 			continue;
1068 		}
1069 		if (lport != inp->sctp_lport) {
1070 			SCTP_INP_RUNLOCK(inp);
1071 			continue;
1072 		}
1073 		switch (to->sa_family) {
1074 #ifdef INET
1075 		case AF_INET:
1076 			{
1077 				struct sockaddr_in *sin;
1078 
1079 				sin = (struct sockaddr_in *)to;
1080 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081 				    &sin->sin_addr) != 0) {
1082 					SCTP_INP_RUNLOCK(inp);
1083 					continue;
1084 				}
1085 				break;
1086 			}
1087 #endif
1088 #ifdef INET6
1089 		case AF_INET6:
1090 			{
1091 				struct sockaddr_in6 *sin6;
1092 
1093 				sin6 = (struct sockaddr_in6 *)to;
1094 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095 				    &sin6->sin6_addr) != 0) {
1096 					SCTP_INP_RUNLOCK(inp);
1097 					continue;
1098 				}
1099 				break;
1100 			}
1101 #endif
1102 		default:
1103 			SCTP_INP_RUNLOCK(inp);
1104 			continue;
1105 		}
1106 		if (inp->def_vrf_id != vrf_id) {
1107 			SCTP_INP_RUNLOCK(inp);
1108 			continue;
1109 		}
1110 		/* check to see if the ep has one of the addresses */
1111 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112 			/* We are NOT bound all, so look further */
1113 			int match = 0;
1114 
1115 			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116 
1117 				if (laddr->ifa == NULL) {
1118 					SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1119 					continue;
1120 				}
1121 				if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122 					SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123 					continue;
1124 				}
1125 				if (laddr->ifa->address.sa.sa_family ==
1126 				    to->sa_family) {
1127 					/* see if it matches */
1128 #ifdef INET
1129 					if (from->sa_family == AF_INET) {
1130 						struct sockaddr_in *intf_addr,
1131 						           *sin;
1132 
1133 						intf_addr = &laddr->ifa->address.sin;
1134 						sin = (struct sockaddr_in *)to;
1135 						if (sin->sin_addr.s_addr ==
1136 						    intf_addr->sin_addr.s_addr) {
1137 							match = 1;
1138 							break;
1139 						}
1140 					}
1141 #endif
1142 #ifdef INET6
1143 					if (from->sa_family == AF_INET6) {
1144 						struct sockaddr_in6 *intf_addr6;
1145 						struct sockaddr_in6 *sin6;
1146 
1147 						sin6 = (struct sockaddr_in6 *)
1148 						    to;
1149 						intf_addr6 = &laddr->ifa->address.sin6;
1150 
1151 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152 						    intf_addr6)) {
1153 							match = 1;
1154 							break;
1155 						}
1156 					}
1157 #endif
1158 				}
1159 			}
1160 			if (match == 0) {
1161 				/* This endpoint does not have this address */
1162 				SCTP_INP_RUNLOCK(inp);
1163 				continue;
1164 			}
1165 		}
1166 		/*
1167 		 * Ok if we hit here the ep has the address, does it hold
1168 		 * the tcb?
1169 		 */
1170 		/* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171 		stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172 		if (stcb == NULL) {
1173 			SCTP_INP_RUNLOCK(inp);
1174 			continue;
1175 		}
1176 		SCTP_TCB_LOCK(stcb);
1177 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178 			SCTP_TCB_UNLOCK(stcb);
1179 			SCTP_INP_RUNLOCK(inp);
1180 			continue;
1181 		}
1182 		if (stcb->rport != rport) {
1183 			/* remote port does not match. */
1184 			SCTP_TCB_UNLOCK(stcb);
1185 			SCTP_INP_RUNLOCK(inp);
1186 			continue;
1187 		}
1188 		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189 			SCTP_TCB_UNLOCK(stcb);
1190 			SCTP_INP_RUNLOCK(inp);
1191 			continue;
1192 		}
1193 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194 			SCTP_TCB_UNLOCK(stcb);
1195 			SCTP_INP_RUNLOCK(inp);
1196 			continue;
1197 		}
1198 		/* Does this TCB have a matching address? */
1199 		TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200 
1201 			if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202 				/* not the same family, can't be a match */
1203 				continue;
1204 			}
1205 			switch (from->sa_family) {
1206 #ifdef INET
1207 			case AF_INET:
1208 				{
1209 					struct sockaddr_in *sin, *rsin;
1210 
1211 					sin = (struct sockaddr_in *)&net->ro._l_addr;
1212 					rsin = (struct sockaddr_in *)from;
1213 					if (sin->sin_addr.s_addr ==
1214 					    rsin->sin_addr.s_addr) {
1215 						/* found it */
1216 						if (netp != NULL) {
1217 							*netp = net;
1218 						}
1219 						/*
1220 						 * Update the endpoint
1221 						 * pointer
1222 						 */
1223 						*inp_p = inp;
1224 						SCTP_INP_RUNLOCK(inp);
1225 						return (stcb);
1226 					}
1227 					break;
1228 				}
1229 #endif
1230 #ifdef INET6
1231 			case AF_INET6:
1232 				{
1233 					struct sockaddr_in6 *sin6, *rsin6;
1234 
1235 					sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236 					rsin6 = (struct sockaddr_in6 *)from;
1237 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238 					    rsin6)) {
1239 						/* found it */
1240 						if (netp != NULL) {
1241 							*netp = net;
1242 						}
1243 						/*
1244 						 * Update the endpoint
1245 						 * pointer
1246 						 */
1247 						*inp_p = inp;
1248 						SCTP_INP_RUNLOCK(inp);
1249 						return (stcb);
1250 					}
1251 					break;
1252 				}
1253 #endif
1254 			default:
1255 				/* TSNH */
1256 				break;
1257 			}
1258 		}
1259 		SCTP_TCB_UNLOCK(stcb);
1260 		SCTP_INP_RUNLOCK(inp);
1261 	}
1262 	return (NULL);
1263 }
1264 
1265 
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274 
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279 	struct sctpasochead *head;
1280 	struct sctp_inpcb *inp;
1281 	struct sctp_tcb *stcb = NULL;
1282 	struct sctp_nets *net;
1283 	uint16_t rport;
1284 
1285 	inp = *inp_p;
1286 	switch (remote->sa_family) {
1287 #ifdef INET
1288 	case AF_INET:
1289 		rport = (((struct sockaddr_in *)remote)->sin_port);
1290 		break;
1291 #endif
1292 #ifdef INET6
1293 	case AF_INET6:
1294 		rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295 		break;
1296 #endif
1297 	default:
1298 		return (NULL);
1299 	}
1300 	if (locked_tcb) {
1301 		/*
1302 		 * UN-lock so we can do proper locking here this occurs when
1303 		 * called from load_addresses_from_init.
1304 		 */
1305 		atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306 		SCTP_TCB_UNLOCK(locked_tcb);
1307 	}
1308 	SCTP_INP_INFO_RLOCK();
1309 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311 		/*-
1312 		 * Now either this guy is our listener or it's the
1313 		 * connector. If it is the one that issued the connect, then
1314 		 * it's only chance is to be the first TCB in the list. If
1315 		 * it is the acceptor, then do the special_lookup to hash
1316 		 * and find the real inp.
1317 		 */
1318 		if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319 			/* to is peer addr, from is my addr */
1320 			stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321 			    netp, inp->def_vrf_id);
1322 			if ((stcb != NULL) && (locked_tcb == NULL)) {
1323 				/* we have a locked tcb, lower refcount */
1324 				SCTP_INP_DECR_REF(inp);
1325 			}
1326 			if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327 				SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328 				SCTP_TCB_LOCK(locked_tcb);
1329 				atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330 				SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331 			}
1332 			SCTP_INP_INFO_RUNLOCK();
1333 			return (stcb);
1334 		} else {
1335 			SCTP_INP_WLOCK(inp);
1336 			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337 				goto null_return;
1338 			}
1339 			stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340 			if (stcb == NULL) {
1341 				goto null_return;
1342 			}
1343 			SCTP_TCB_LOCK(stcb);
1344 
1345 			if (stcb->rport != rport) {
1346 				/* remote port does not match. */
1347 				SCTP_TCB_UNLOCK(stcb);
1348 				goto null_return;
1349 			}
1350 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351 				SCTP_TCB_UNLOCK(stcb);
1352 				goto null_return;
1353 			}
1354 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355 				SCTP_TCB_UNLOCK(stcb);
1356 				goto null_return;
1357 			}
1358 			/* now look at the list of remote addresses */
1359 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1362 					panic("Corrupt net list");
1363 				}
1364 #endif
1365 				if (net->ro._l_addr.sa.sa_family !=
1366 				    remote->sa_family) {
1367 					/* not the same family */
1368 					continue;
1369 				}
1370 				switch (remote->sa_family) {
1371 #ifdef INET
1372 				case AF_INET:
1373 					{
1374 						struct sockaddr_in *sin,
1375 						           *rsin;
1376 
1377 						sin = (struct sockaddr_in *)
1378 						    &net->ro._l_addr;
1379 						rsin = (struct sockaddr_in *)remote;
1380 						if (sin->sin_addr.s_addr ==
1381 						    rsin->sin_addr.s_addr) {
1382 							/* found it */
1383 							if (netp != NULL) {
1384 								*netp = net;
1385 							}
1386 							if (locked_tcb == NULL) {
1387 								SCTP_INP_DECR_REF(inp);
1388 							} else if (locked_tcb != stcb) {
1389 								SCTP_TCB_LOCK(locked_tcb);
1390 							}
1391 							if (locked_tcb) {
1392 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393 							}
1394 							SCTP_INP_WUNLOCK(inp);
1395 							SCTP_INP_INFO_RUNLOCK();
1396 							return (stcb);
1397 						}
1398 						break;
1399 					}
1400 #endif
1401 #ifdef INET6
1402 				case AF_INET6:
1403 					{
1404 						struct sockaddr_in6 *sin6,
1405 						            *rsin6;
1406 
1407 						sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408 						rsin6 = (struct sockaddr_in6 *)remote;
1409 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410 						    rsin6)) {
1411 							/* found it */
1412 							if (netp != NULL) {
1413 								*netp = net;
1414 							}
1415 							if (locked_tcb == NULL) {
1416 								SCTP_INP_DECR_REF(inp);
1417 							} else if (locked_tcb != stcb) {
1418 								SCTP_TCB_LOCK(locked_tcb);
1419 							}
1420 							if (locked_tcb) {
1421 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422 							}
1423 							SCTP_INP_WUNLOCK(inp);
1424 							SCTP_INP_INFO_RUNLOCK();
1425 							return (stcb);
1426 						}
1427 						break;
1428 					}
1429 #endif
1430 				default:
1431 					/* TSNH */
1432 					break;
1433 				}
1434 			}
1435 			SCTP_TCB_UNLOCK(stcb);
1436 		}
1437 	} else {
1438 		SCTP_INP_WLOCK(inp);
1439 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440 			goto null_return;
1441 		}
1442 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443 		    inp->sctp_hashmark)];
1444 		LIST_FOREACH(stcb, head, sctp_tcbhash) {
1445 			if (stcb->rport != rport) {
1446 				/* remote port does not match */
1447 				continue;
1448 			}
1449 			SCTP_TCB_LOCK(stcb);
1450 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1451 				SCTP_TCB_UNLOCK(stcb);
1452 				continue;
1453 			}
1454 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1455 				SCTP_TCB_UNLOCK(stcb);
1456 				continue;
1457 			}
1458 			/* now look at the list of remote addresses */
1459 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1460 #ifdef INVARIANTS
1461 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1462 					panic("Corrupt net list");
1463 				}
1464 #endif
1465 				if (net->ro._l_addr.sa.sa_family !=
1466 				    remote->sa_family) {
1467 					/* not the same family */
1468 					continue;
1469 				}
1470 				switch (remote->sa_family) {
1471 #ifdef INET
1472 				case AF_INET:
1473 					{
1474 						struct sockaddr_in *sin,
1475 						           *rsin;
1476 
1477 						sin = (struct sockaddr_in *)
1478 						    &net->ro._l_addr;
1479 						rsin = (struct sockaddr_in *)remote;
1480 						if (sin->sin_addr.s_addr ==
1481 						    rsin->sin_addr.s_addr) {
1482 							/* found it */
1483 							if (netp != NULL) {
1484 								*netp = net;
1485 							}
1486 							if (locked_tcb == NULL) {
1487 								SCTP_INP_DECR_REF(inp);
1488 							} else if (locked_tcb != stcb) {
1489 								SCTP_TCB_LOCK(locked_tcb);
1490 							}
1491 							if (locked_tcb) {
1492 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1493 							}
1494 							SCTP_INP_WUNLOCK(inp);
1495 							SCTP_INP_INFO_RUNLOCK();
1496 							return (stcb);
1497 						}
1498 						break;
1499 					}
1500 #endif
1501 #ifdef INET6
1502 				case AF_INET6:
1503 					{
1504 						struct sockaddr_in6 *sin6,
1505 						            *rsin6;
1506 
1507 						sin6 = (struct sockaddr_in6 *)
1508 						    &net->ro._l_addr;
1509 						rsin6 = (struct sockaddr_in6 *)remote;
1510 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1511 						    rsin6)) {
1512 							/* found it */
1513 							if (netp != NULL) {
1514 								*netp = net;
1515 							}
1516 							if (locked_tcb == NULL) {
1517 								SCTP_INP_DECR_REF(inp);
1518 							} else if (locked_tcb != stcb) {
1519 								SCTP_TCB_LOCK(locked_tcb);
1520 							}
1521 							if (locked_tcb) {
1522 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1523 							}
1524 							SCTP_INP_WUNLOCK(inp);
1525 							SCTP_INP_INFO_RUNLOCK();
1526 							return (stcb);
1527 						}
1528 						break;
1529 					}
1530 #endif
1531 				default:
1532 					/* TSNH */
1533 					break;
1534 				}
1535 			}
1536 			SCTP_TCB_UNLOCK(stcb);
1537 		}
1538 	}
1539 null_return:
1540 	/* clean up for returning null */
1541 	if (locked_tcb) {
1542 		SCTP_TCB_LOCK(locked_tcb);
1543 		atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1544 	}
1545 	SCTP_INP_WUNLOCK(inp);
1546 	SCTP_INP_INFO_RUNLOCK();
1547 	/* not found */
1548 	return (NULL);
1549 }
1550 
1551 
1552 /*
1553  * Find an association for a specific endpoint using the association id given
1554  * out in the COMM_UP notification
1555  */
1556 struct sctp_tcb *
1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1558 {
1559 	/*
1560 	 * Use my the assoc_id to find a endpoint
1561 	 */
1562 	struct sctpasochead *head;
1563 	struct sctp_tcb *stcb;
1564 	uint32_t id;
1565 
1566 	if (inp == NULL) {
1567 		SCTP_PRINTF("TSNH ep_associd\n");
1568 		return (NULL);
1569 	}
1570 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1571 		SCTP_PRINTF("TSNH ep_associd0\n");
1572 		return (NULL);
1573 	}
1574 	id = (uint32_t) asoc_id;
1575 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1576 	if (head == NULL) {
1577 		/* invalid id TSNH */
1578 		SCTP_PRINTF("TSNH ep_associd1\n");
1579 		return (NULL);
1580 	}
1581 	LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1582 		if (stcb->asoc.assoc_id == id) {
1583 			if (inp != stcb->sctp_ep) {
1584 				/*
1585 				 * some other guy has the same id active (id
1586 				 * collision ??).
1587 				 */
1588 				SCTP_PRINTF("TSNH ep_associd2\n");
1589 				continue;
1590 			}
1591 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1592 				continue;
1593 			}
1594 			if (want_lock) {
1595 				SCTP_TCB_LOCK(stcb);
1596 			}
1597 			return (stcb);
1598 		}
1599 	}
1600 	return (NULL);
1601 }
1602 
1603 
1604 struct sctp_tcb *
1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1606 {
1607 	struct sctp_tcb *stcb;
1608 
1609 	SCTP_INP_RLOCK(inp);
1610 	stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1611 	SCTP_INP_RUNLOCK(inp);
1612 	return (stcb);
1613 }
1614 
1615 
1616 /*
1617  * Endpoint probe expects that the INP_INFO is locked.
1618  */
1619 static struct sctp_inpcb *
1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1621     uint16_t lport, uint32_t vrf_id)
1622 {
1623 	struct sctp_inpcb *inp;
1624 	struct sctp_laddr *laddr;
1625 
1626 #ifdef INET
1627 	struct sockaddr_in *sin;
1628 
1629 #endif
1630 #ifdef INET6
1631 	struct sockaddr_in6 *sin6;
1632 	struct sockaddr_in6 *intf_addr6;
1633 
1634 #endif
1635 	int fnd;
1636 
1637 #ifdef INET
1638 	sin = NULL;
1639 #endif
1640 #ifdef INET6
1641 	sin6 = NULL;
1642 #endif
1643 	switch (nam->sa_family) {
1644 #ifdef INET
1645 	case AF_INET:
1646 		sin = (struct sockaddr_in *)nam;
1647 		break;
1648 #endif
1649 #ifdef INET6
1650 	case AF_INET6:
1651 		sin6 = (struct sockaddr_in6 *)nam;
1652 		break;
1653 #endif
1654 	default:
1655 		/* unsupported family */
1656 		return (NULL);
1657 	}
1658 
1659 	if (head == NULL)
1660 		return (NULL);
1661 
1662 	LIST_FOREACH(inp, head, sctp_hash) {
1663 		SCTP_INP_RLOCK(inp);
1664 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665 			SCTP_INP_RUNLOCK(inp);
1666 			continue;
1667 		}
1668 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1669 		    (inp->sctp_lport == lport)) {
1670 			/* got it */
1671 			switch (nam->sa_family) {
1672 #ifdef INET
1673 			case AF_INET:
1674 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1675 				    SCTP_IPV6_V6ONLY(inp)) {
1676 					/*
1677 					 * IPv4 on a IPv6 socket with ONLY
1678 					 * IPv6 set
1679 					 */
1680 					SCTP_INP_RUNLOCK(inp);
1681 					continue;
1682 				}
1683 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1684 				    &sin->sin_addr) != 0) {
1685 					SCTP_INP_RUNLOCK(inp);
1686 					continue;
1687 				}
1688 				break;
1689 #endif
1690 #ifdef INET6
1691 			case AF_INET6:
1692 				/*
1693 				 * A V6 address and the endpoint is NOT
1694 				 * bound V6
1695 				 */
1696 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1697 					SCTP_INP_RUNLOCK(inp);
1698 					continue;
1699 				}
1700 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1701 				    &sin6->sin6_addr) != 0) {
1702 					SCTP_INP_RUNLOCK(inp);
1703 					continue;
1704 				}
1705 				break;
1706 #endif
1707 			default:
1708 				break;
1709 			}
1710 			/* does a VRF id match? */
1711 			fnd = 0;
1712 			if (inp->def_vrf_id == vrf_id)
1713 				fnd = 1;
1714 
1715 			SCTP_INP_RUNLOCK(inp);
1716 			if (!fnd)
1717 				continue;
1718 			return (inp);
1719 		}
1720 		SCTP_INP_RUNLOCK(inp);
1721 	}
1722 	switch (nam->sa_family) {
1723 #ifdef INET
1724 	case AF_INET:
1725 		if (sin->sin_addr.s_addr == INADDR_ANY) {
1726 			/* Can't hunt for one that has no address specified */
1727 			return (NULL);
1728 		}
1729 		break;
1730 #endif
1731 #ifdef INET6
1732 	case AF_INET6:
1733 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1734 			/* Can't hunt for one that has no address specified */
1735 			return (NULL);
1736 		}
1737 		break;
1738 #endif
1739 	default:
1740 		break;
1741 	}
1742 	/*
1743 	 * ok, not bound to all so see if we can find a EP bound to this
1744 	 * address.
1745 	 */
1746 	LIST_FOREACH(inp, head, sctp_hash) {
1747 		SCTP_INP_RLOCK(inp);
1748 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1749 			SCTP_INP_RUNLOCK(inp);
1750 			continue;
1751 		}
1752 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1753 			SCTP_INP_RUNLOCK(inp);
1754 			continue;
1755 		}
1756 		/*
1757 		 * Ok this could be a likely candidate, look at all of its
1758 		 * addresses
1759 		 */
1760 		if (inp->sctp_lport != lport) {
1761 			SCTP_INP_RUNLOCK(inp);
1762 			continue;
1763 		}
1764 		/* does a VRF id match? */
1765 		fnd = 0;
1766 		if (inp->def_vrf_id == vrf_id)
1767 			fnd = 1;
1768 
1769 		if (!fnd) {
1770 			SCTP_INP_RUNLOCK(inp);
1771 			continue;
1772 		}
1773 		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1774 			if (laddr->ifa == NULL) {
1775 				SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1776 				    __func__);
1777 				continue;
1778 			}
1779 			SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1780 			    (void *)laddr->ifa);
1781 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1782 				SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1783 				continue;
1784 			}
1785 			if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1786 				/* possible, see if it matches */
1787 				switch (nam->sa_family) {
1788 #ifdef INET
1789 				case AF_INET:
1790 					if (sin->sin_addr.s_addr ==
1791 					    laddr->ifa->address.sin.sin_addr.s_addr) {
1792 						SCTP_INP_RUNLOCK(inp);
1793 						return (inp);
1794 					}
1795 					break;
1796 #endif
1797 #ifdef INET6
1798 				case AF_INET6:
1799 					intf_addr6 = &laddr->ifa->address.sin6;
1800 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1801 					    intf_addr6)) {
1802 						SCTP_INP_RUNLOCK(inp);
1803 						return (inp);
1804 					}
1805 					break;
1806 #endif
1807 				}
1808 			}
1809 		}
1810 		SCTP_INP_RUNLOCK(inp);
1811 	}
1812 	return (NULL);
1813 }
1814 
1815 
1816 static struct sctp_inpcb *
1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1818 {
1819 	struct sctppcbhead *head;
1820 	struct sctp_inpcb *t_inp;
1821 	int fnd;
1822 
1823 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1824 	    SCTP_BASE_INFO(hashmark))];
1825 	LIST_FOREACH(t_inp, head, sctp_hash) {
1826 		if (t_inp->sctp_lport != lport) {
1827 			continue;
1828 		}
1829 		/* is it in the VRF in question */
1830 		fnd = 0;
1831 		if (t_inp->def_vrf_id == vrf_id)
1832 			fnd = 1;
1833 		if (!fnd)
1834 			continue;
1835 
1836 		/* This one is in use. */
1837 		/* check the v6/v4 binding issue */
1838 		if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1839 		    SCTP_IPV6_V6ONLY(t_inp)) {
1840 			if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841 				/* collision in V6 space */
1842 				return (t_inp);
1843 			} else {
1844 				/* inp is BOUND_V4 no conflict */
1845 				continue;
1846 			}
1847 		} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1848 			/* t_inp is bound v4 and v6, conflict always */
1849 			return (t_inp);
1850 		} else {
1851 			/* t_inp is bound only V4 */
1852 			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1853 			    SCTP_IPV6_V6ONLY(inp)) {
1854 				/* no conflict */
1855 				continue;
1856 			}
1857 			/* else fall through to conflict */
1858 		}
1859 		return (t_inp);
1860 	}
1861 	return (NULL);
1862 }
1863 
1864 
1865 int
1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1867 {
1868 	/* For 1-2-1 with port reuse */
1869 	struct sctppcbhead *head;
1870 	struct sctp_inpcb *tinp, *ninp;
1871 
1872 	if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1873 		/* only works with port reuse on */
1874 		return (-1);
1875 	}
1876 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1877 		return (0);
1878 	}
1879 	SCTP_INP_RUNLOCK(inp);
1880 	SCTP_INP_INFO_WLOCK();
1881 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1882 	    SCTP_BASE_INFO(hashmark))];
1883 	/* Kick out all non-listeners to the TCP hash */
1884 	LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1885 		if (tinp->sctp_lport != inp->sctp_lport) {
1886 			continue;
1887 		}
1888 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889 			continue;
1890 		}
1891 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1892 			continue;
1893 		}
1894 		if (tinp->sctp_socket->so_qlimit) {
1895 			continue;
1896 		}
1897 		SCTP_INP_WLOCK(tinp);
1898 		LIST_REMOVE(tinp, sctp_hash);
1899 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1900 		tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1901 		LIST_INSERT_HEAD(head, tinp, sctp_hash);
1902 		SCTP_INP_WUNLOCK(tinp);
1903 	}
1904 	SCTP_INP_WLOCK(inp);
1905 	/* Pull from where he was */
1906 	LIST_REMOVE(inp, sctp_hash);
1907 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1908 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1909 	LIST_INSERT_HEAD(head, inp, sctp_hash);
1910 	SCTP_INP_WUNLOCK(inp);
1911 	SCTP_INP_RLOCK(inp);
1912 	SCTP_INP_INFO_WUNLOCK();
1913 	return (0);
1914 }
1915 
1916 
1917 struct sctp_inpcb *
1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1919     uint32_t vrf_id)
1920 {
1921 	/*
1922 	 * First we check the hash table to see if someone has this port
1923 	 * bound with just the port.
1924 	 */
1925 	struct sctp_inpcb *inp;
1926 	struct sctppcbhead *head;
1927 	int lport;
1928 	unsigned int i;
1929 
1930 #ifdef INET
1931 	struct sockaddr_in *sin;
1932 
1933 #endif
1934 #ifdef INET6
1935 	struct sockaddr_in6 *sin6;
1936 
1937 #endif
1938 
1939 	switch (nam->sa_family) {
1940 #ifdef INET
1941 	case AF_INET:
1942 		sin = (struct sockaddr_in *)nam;
1943 		lport = sin->sin_port;
1944 		break;
1945 #endif
1946 #ifdef INET6
1947 	case AF_INET6:
1948 		sin6 = (struct sockaddr_in6 *)nam;
1949 		lport = sin6->sin6_port;
1950 		break;
1951 #endif
1952 	default:
1953 		return (NULL);
1954 	}
1955 	/*
1956 	 * I could cheat here and just cast to one of the types but we will
1957 	 * do it right. It also provides the check against an Unsupported
1958 	 * type too.
1959 	 */
1960 	/* Find the head of the ALLADDR chain */
1961 	if (have_lock == 0) {
1962 		SCTP_INP_INFO_RLOCK();
1963 	}
1964 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1965 	    SCTP_BASE_INFO(hashmark))];
1966 	inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1967 
1968 	/*
1969 	 * If the TCP model exists it could be that the main listening
1970 	 * endpoint is gone but there still exists a connected socket for
1971 	 * this guy. If so we can return the first one that we find. This
1972 	 * may NOT be the correct one so the caller should be wary on the
1973 	 * returned INP. Currently the only caller that sets find_tcp_pool
1974 	 * is in bindx where we are verifying that a user CAN bind the
1975 	 * address. He either has bound it already, or someone else has, or
1976 	 * its open to bind, so this is good enough.
1977 	 */
1978 	if (inp == NULL && find_tcp_pool) {
1979 		for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1980 			head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1981 			inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1982 			if (inp) {
1983 				break;
1984 			}
1985 		}
1986 	}
1987 	if (inp) {
1988 		SCTP_INP_INCR_REF(inp);
1989 	}
1990 	if (have_lock == 0) {
1991 		SCTP_INP_INFO_RUNLOCK();
1992 	}
1993 	return (inp);
1994 }
1995 
1996 
1997 /*
1998  * Find an association for an endpoint with the pointer to whom you want to
1999  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2000  * need to change the *to to some other struct like a mbuf...
2001  */
2002 struct sctp_tcb *
2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2004     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2005     uint32_t vrf_id)
2006 {
2007 	struct sctp_inpcb *inp = NULL;
2008 	struct sctp_tcb *stcb;
2009 
2010 	SCTP_INP_INFO_RLOCK();
2011 	if (find_tcp_pool) {
2012 		if (inp_p != NULL) {
2013 			stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2014 			    vrf_id);
2015 		} else {
2016 			stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2017 			    vrf_id);
2018 		}
2019 		if (stcb != NULL) {
2020 			SCTP_INP_INFO_RUNLOCK();
2021 			return (stcb);
2022 		}
2023 	}
2024 	inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2025 	if (inp_p != NULL) {
2026 		*inp_p = inp;
2027 	}
2028 	SCTP_INP_INFO_RUNLOCK();
2029 	if (inp == NULL) {
2030 		return (NULL);
2031 	}
2032 	/*
2033 	 * ok, we have an endpoint, now lets find the assoc for it (if any)
2034 	 * we now place the source address or from in the to of the find
2035 	 * endpoint call. Since in reality this chain is used from the
2036 	 * inbound packet side.
2037 	 */
2038 	if (inp_p != NULL) {
2039 		stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2040 		    NULL);
2041 	} else {
2042 		stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2043 		    NULL);
2044 	}
2045 	return (stcb);
2046 }
2047 
2048 
2049 /*
2050  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2051  * find all addresses that the sender has specified in any address list. Each
2052  * address will be used to lookup the TCB and see if one exits.
2053  */
2054 static struct sctp_tcb *
2055 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2056     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2057     struct sockaddr *dst)
2058 {
2059 	struct sctp_paramhdr *phdr, parm_buf;
2060 
2061 #if defined(INET) || defined(INET6)
2062 	struct sctp_tcb *stcb;
2063 	uint16_t ptype;
2064 
2065 #endif
2066 	uint16_t plen;
2067 
2068 #ifdef INET
2069 	struct sockaddr_in sin4;
2070 
2071 #endif
2072 #ifdef INET6
2073 	struct sockaddr_in6 sin6;
2074 
2075 #endif
2076 
2077 #ifdef INET
2078 	memset(&sin4, 0, sizeof(sin4));
2079 	sin4.sin_len = sizeof(sin4);
2080 	sin4.sin_family = AF_INET;
2081 	sin4.sin_port = sh->src_port;
2082 #endif
2083 #ifdef INET6
2084 	memset(&sin6, 0, sizeof(sin6));
2085 	sin6.sin6_len = sizeof(sin6);
2086 	sin6.sin6_family = AF_INET6;
2087 	sin6.sin6_port = sh->src_port;
2088 #endif
2089 
2090 	offset += sizeof(struct sctp_init_chunk);
2091 
2092 	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2093 	while (phdr != NULL) {
2094 		/* now we must see if we want the parameter */
2095 #if defined(INET) || defined(INET6)
2096 		ptype = ntohs(phdr->param_type);
2097 #endif
2098 		plen = ntohs(phdr->param_length);
2099 		if (plen == 0) {
2100 			break;
2101 		}
2102 #ifdef INET
2103 		if (ptype == SCTP_IPV4_ADDRESS &&
2104 		    plen == sizeof(struct sctp_ipv4addr_param)) {
2105 			/* Get the rest of the address */
2106 			struct sctp_ipv4addr_param ip4_parm, *p4;
2107 
2108 			phdr = sctp_get_next_param(m, offset,
2109 			    (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2110 			if (phdr == NULL) {
2111 				return (NULL);
2112 			}
2113 			p4 = (struct sctp_ipv4addr_param *)phdr;
2114 			memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2115 			/* look it up */
2116 			stcb = sctp_findassociation_ep_addr(inp_p,
2117 			    (struct sockaddr *)&sin4, netp, dst, NULL);
2118 			if (stcb != NULL) {
2119 				return (stcb);
2120 			}
2121 		}
2122 #endif
2123 #ifdef INET6
2124 		if (ptype == SCTP_IPV6_ADDRESS &&
2125 		    plen == sizeof(struct sctp_ipv6addr_param)) {
2126 			/* Get the rest of the address */
2127 			struct sctp_ipv6addr_param ip6_parm, *p6;
2128 
2129 			phdr = sctp_get_next_param(m, offset,
2130 			    (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2131 			if (phdr == NULL) {
2132 				return (NULL);
2133 			}
2134 			p6 = (struct sctp_ipv6addr_param *)phdr;
2135 			memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2136 			/* look it up */
2137 			stcb = sctp_findassociation_ep_addr(inp_p,
2138 			    (struct sockaddr *)&sin6, netp, dst, NULL);
2139 			if (stcb != NULL) {
2140 				return (stcb);
2141 			}
2142 		}
2143 #endif
2144 		offset += SCTP_SIZE32(plen);
2145 		phdr = sctp_get_next_param(m, offset, &parm_buf,
2146 		    sizeof(parm_buf));
2147 	}
2148 	return (NULL);
2149 }
2150 
2151 static struct sctp_tcb *
2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2153     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2154     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2155 {
2156 	/*
2157 	 * Use my vtag to hash. If we find it we then verify the source addr
2158 	 * is in the assoc. If all goes well we save a bit on rec of a
2159 	 * packet.
2160 	 */
2161 	struct sctpasochead *head;
2162 	struct sctp_nets *net;
2163 	struct sctp_tcb *stcb;
2164 
2165 	SCTP_INP_INFO_RLOCK();
2166 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2167 	    SCTP_BASE_INFO(hashasocmark))];
2168 	LIST_FOREACH(stcb, head, sctp_asocs) {
2169 		SCTP_INP_RLOCK(stcb->sctp_ep);
2170 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2171 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2172 			continue;
2173 		}
2174 		if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2175 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2176 			continue;
2177 		}
2178 		SCTP_TCB_LOCK(stcb);
2179 		SCTP_INP_RUNLOCK(stcb->sctp_ep);
2180 		if (stcb->asoc.my_vtag == vtag) {
2181 			/* candidate */
2182 			if (stcb->rport != rport) {
2183 				SCTP_TCB_UNLOCK(stcb);
2184 				continue;
2185 			}
2186 			if (stcb->sctp_ep->sctp_lport != lport) {
2187 				SCTP_TCB_UNLOCK(stcb);
2188 				continue;
2189 			}
2190 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2191 				SCTP_TCB_UNLOCK(stcb);
2192 				continue;
2193 			}
2194 			/* RRS:Need toaddr check here */
2195 			if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2196 				/* Endpoint does not own this address */
2197 				SCTP_TCB_UNLOCK(stcb);
2198 				continue;
2199 			}
2200 			if (remote_tag) {
2201 				/*
2202 				 * If we have both vtags that's all we match
2203 				 * on
2204 				 */
2205 				if (stcb->asoc.peer_vtag == remote_tag) {
2206 					/*
2207 					 * If both tags match we consider it
2208 					 * conclusive and check NO
2209 					 * source/destination addresses
2210 					 */
2211 					goto conclusive;
2212 				}
2213 			}
2214 			if (skip_src_check) {
2215 		conclusive:
2216 				if (from) {
2217 					*netp = sctp_findnet(stcb, from);
2218 				} else {
2219 					*netp = NULL;	/* unknown */
2220 				}
2221 				if (inp_p)
2222 					*inp_p = stcb->sctp_ep;
2223 				SCTP_INP_INFO_RUNLOCK();
2224 				return (stcb);
2225 			}
2226 			net = sctp_findnet(stcb, from);
2227 			if (net) {
2228 				/* yep its him. */
2229 				*netp = net;
2230 				SCTP_STAT_INCR(sctps_vtagexpress);
2231 				*inp_p = stcb->sctp_ep;
2232 				SCTP_INP_INFO_RUNLOCK();
2233 				return (stcb);
2234 			} else {
2235 				/*
2236 				 * not him, this should only happen in rare
2237 				 * cases so I peg it.
2238 				 */
2239 				SCTP_STAT_INCR(sctps_vtagbogus);
2240 			}
2241 		}
2242 		SCTP_TCB_UNLOCK(stcb);
2243 	}
2244 	SCTP_INP_INFO_RUNLOCK();
2245 	return (NULL);
2246 }
2247 
2248 
2249 /*
2250  * Find an association with the pointer to the inbound IP packet. This can be
2251  * a IPv4 or IPv6 packet.
2252  */
2253 struct sctp_tcb *
2254 sctp_findassociation_addr(struct mbuf *m, int offset,
2255     struct sockaddr *src, struct sockaddr *dst,
2256     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2257     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2258 {
2259 	struct sctp_tcb *stcb;
2260 	struct sctp_inpcb *inp;
2261 
2262 	if (sh->v_tag) {
2263 		/* we only go down this path if vtag is non-zero */
2264 		stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2265 		    inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2266 		if (stcb) {
2267 			return (stcb);
2268 		}
2269 	}
2270 	if (inp_p) {
2271 		stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2272 		    1, vrf_id);
2273 		inp = *inp_p;
2274 	} else {
2275 		stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2276 		    1, vrf_id);
2277 	}
2278 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2279 	if (stcb == NULL && inp) {
2280 		/* Found a EP but not this address */
2281 		if ((ch->chunk_type == SCTP_INITIATION) ||
2282 		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
2283 			/*-
2284 			 * special hook, we do NOT return linp or an
2285 			 * association that is linked to an existing
2286 			 * association that is under the TCP pool (i.e. no
2287 			 * listener exists). The endpoint finding routine
2288 			 * will always find a listener before examining the
2289 			 * TCP pool.
2290 			 */
2291 			if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2292 				if (inp_p) {
2293 					*inp_p = NULL;
2294 				}
2295 				return (NULL);
2296 			}
2297 			stcb = sctp_findassociation_special_addr(m,
2298 			    offset, sh, &inp, netp, dst);
2299 			if (inp_p != NULL) {
2300 				*inp_p = inp;
2301 			}
2302 		}
2303 	}
2304 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2305 	return (stcb);
2306 }
2307 
2308 /*
2309  * lookup an association by an ASCONF lookup address.
2310  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2311  */
2312 struct sctp_tcb *
2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2314     struct sockaddr *dst, struct sctphdr *sh,
2315     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2316 {
2317 	struct sctp_tcb *stcb;
2318 	union sctp_sockstore remote_store;
2319 	struct sctp_paramhdr parm_buf, *phdr;
2320 	int ptype;
2321 	int zero_address = 0;
2322 
2323 #ifdef INET
2324 	struct sockaddr_in *sin;
2325 
2326 #endif
2327 #ifdef INET6
2328 	struct sockaddr_in6 *sin6;
2329 
2330 #endif
2331 
2332 	memset(&remote_store, 0, sizeof(remote_store));
2333 	phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2334 	    &parm_buf, sizeof(struct sctp_paramhdr));
2335 	if (phdr == NULL) {
2336 		SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2337 		    __func__);
2338 		return NULL;
2339 	}
2340 	ptype = (int)((uint32_t) ntohs(phdr->param_type));
2341 	/* get the correlation address */
2342 	switch (ptype) {
2343 #ifdef INET6
2344 	case SCTP_IPV6_ADDRESS:
2345 		{
2346 			/* ipv6 address param */
2347 			struct sctp_ipv6addr_param *p6, p6_buf;
2348 
2349 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2350 				return NULL;
2351 			}
2352 			p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2353 			    offset + sizeof(struct sctp_asconf_chunk),
2354 			    &p6_buf.ph, sizeof(*p6));
2355 			if (p6 == NULL) {
2356 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2357 				    __func__);
2358 				return (NULL);
2359 			}
2360 			sin6 = &remote_store.sin6;
2361 			sin6->sin6_family = AF_INET6;
2362 			sin6->sin6_len = sizeof(*sin6);
2363 			sin6->sin6_port = sh->src_port;
2364 			memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2365 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2366 				zero_address = 1;
2367 			break;
2368 		}
2369 #endif
2370 #ifdef INET
2371 	case SCTP_IPV4_ADDRESS:
2372 		{
2373 			/* ipv4 address param */
2374 			struct sctp_ipv4addr_param *p4, p4_buf;
2375 
2376 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2377 				return NULL;
2378 			}
2379 			p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2380 			    offset + sizeof(struct sctp_asconf_chunk),
2381 			    &p4_buf.ph, sizeof(*p4));
2382 			if (p4 == NULL) {
2383 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2384 				    __func__);
2385 				return (NULL);
2386 			}
2387 			sin = &remote_store.sin;
2388 			sin->sin_family = AF_INET;
2389 			sin->sin_len = sizeof(*sin);
2390 			sin->sin_port = sh->src_port;
2391 			memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2392 			if (sin->sin_addr.s_addr == INADDR_ANY)
2393 				zero_address = 1;
2394 			break;
2395 		}
2396 #endif
2397 	default:
2398 		/* invalid address param type */
2399 		return NULL;
2400 	}
2401 
2402 	if (zero_address) {
2403 		stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2404 		    netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2405 		if (stcb != NULL) {
2406 			SCTP_INP_DECR_REF(*inp_p);
2407 		}
2408 	} else {
2409 		stcb = sctp_findassociation_ep_addr(inp_p,
2410 		    &remote_store.sa, netp,
2411 		    dst, NULL);
2412 	}
2413 	return (stcb);
2414 }
2415 
2416 
2417 /*
2418  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2419  * addresses. This way if we don't get a bind we by default pick a ephemeral
2420  * port with all addresses bound.
2421  */
2422 int
2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2424 {
2425 	/*
2426 	 * we get called when a new endpoint starts up. We need to allocate
2427 	 * the sctp_inpcb structure from the zone and init it. Mark it as
2428 	 * unbound and find a port that we can use as an ephemeral with
2429 	 * INADDR_ANY. If the user binds later no problem we can then add in
2430 	 * the specific addresses. And setup the default parameters for the
2431 	 * EP.
2432 	 */
2433 	int i, error;
2434 	struct sctp_inpcb *inp;
2435 	struct sctp_pcb *m;
2436 	struct timeval time;
2437 	sctp_sharedkey_t *null_key;
2438 
2439 	error = 0;
2440 
2441 	SCTP_INP_INFO_WLOCK();
2442 	inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2443 	if (inp == NULL) {
2444 		SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2445 		SCTP_INP_INFO_WUNLOCK();
2446 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2447 		return (ENOBUFS);
2448 	}
2449 	/* zap it */
2450 	bzero(inp, sizeof(*inp));
2451 
2452 	/* bump generations */
2453 	/* setup socket pointers */
2454 	inp->sctp_socket = so;
2455 	inp->ip_inp.inp.inp_socket = so;
2456 	inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2457 #ifdef INET6
2458 	if (INP_SOCKAF(so) == AF_INET6) {
2459 		if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2460 			inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2461 		}
2462 		if (MODULE_GLOBAL(ip6_v6only)) {
2463 			inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2464 		}
2465 	}
2466 #endif
2467 	inp->sctp_associd_counter = 1;
2468 	inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2469 	inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2470 	inp->max_cwnd = 0;
2471 	inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2472 	inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2473 	inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2474 	inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2475 	inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2476 	inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2477 	inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2478 	inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2479 	inp->idata_supported = 0;
2480 
2481 	inp->fibnum = so->so_fibnum;
2482 	/* init the small hash table we use to track asocid <-> tcb */
2483 	inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2484 	if (inp->sctp_asocidhash == NULL) {
2485 		crfree(inp->ip_inp.inp.inp_cred);
2486 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2487 		SCTP_INP_INFO_WUNLOCK();
2488 		return (ENOBUFS);
2489 	}
2490 #ifdef IPSEC
2491 	error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2492 	if (error != 0) {
2493 		crfree(inp->ip_inp.inp.inp_cred);
2494 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2495 		SCTP_INP_INFO_WUNLOCK();
2496 		return error;
2497 	}
2498 #endif				/* IPSEC */
2499 	SCTP_INCR_EP_COUNT();
2500 	inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2501 	SCTP_INP_INFO_WUNLOCK();
2502 
2503 	so->so_pcb = (caddr_t)inp;
2504 
2505 	if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2506 		/* UDP style socket */
2507 		inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2508 		    SCTP_PCB_FLAGS_UNBOUND);
2509 		/* Be sure it is NON-BLOCKING IO for UDP */
2510 		/* SCTP_SET_SO_NBIO(so); */
2511 	} else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2512 		/* TCP style socket */
2513 		inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2514 		    SCTP_PCB_FLAGS_UNBOUND);
2515 		/* Be sure we have blocking IO by default */
2516 		SCTP_CLEAR_SO_NBIO(so);
2517 	} else {
2518 		/*
2519 		 * unsupported socket type (RAW, etc)- in case we missed it
2520 		 * in protosw
2521 		 */
2522 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2523 		so->so_pcb = NULL;
2524 		crfree(inp->ip_inp.inp.inp_cred);
2525 #ifdef IPSEC
2526 		ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2527 #endif
2528 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2529 		return (EOPNOTSUPP);
2530 	}
2531 	if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2532 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2533 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2534 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2535 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2536 		sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2537 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2538 		sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2539 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2540 	}
2541 	inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2542 	    &inp->sctp_hashmark);
2543 	if (inp->sctp_tcbhash == NULL) {
2544 		SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2545 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2546 		so->so_pcb = NULL;
2547 		crfree(inp->ip_inp.inp.inp_cred);
2548 #ifdef IPSEC
2549 		ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2550 #endif
2551 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2552 		return (ENOBUFS);
2553 	}
2554 	inp->def_vrf_id = vrf_id;
2555 
2556 	SCTP_INP_INFO_WLOCK();
2557 	SCTP_INP_LOCK_INIT(inp);
2558 	INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2559 	SCTP_INP_READ_INIT(inp);
2560 	SCTP_ASOC_CREATE_LOCK_INIT(inp);
2561 	/* lock the new ep */
2562 	SCTP_INP_WLOCK(inp);
2563 
2564 	/* add it to the info area */
2565 	LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2566 	SCTP_INP_INFO_WUNLOCK();
2567 
2568 	TAILQ_INIT(&inp->read_queue);
2569 	LIST_INIT(&inp->sctp_addr_list);
2570 
2571 	LIST_INIT(&inp->sctp_asoc_list);
2572 
2573 #ifdef SCTP_TRACK_FREED_ASOCS
2574 	/* TEMP CODE */
2575 	LIST_INIT(&inp->sctp_asoc_free_list);
2576 #endif
2577 	/* Init the timer structure for signature change */
2578 	SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2579 	inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2580 
2581 	/* now init the actual endpoint default data */
2582 	m = &inp->sctp_ep;
2583 
2584 	/* setup the base timeout information */
2585 	m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);	/* needed ? */
2586 	m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);	/* needed ? */
2587 	m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2588 	m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2589 	m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2590 	m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2591 	m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2592 	/* all max/min max are in ms */
2593 	m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2594 	m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2595 	m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2596 	m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2597 	m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2598 	m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2599 	m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2600 	m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2601 	m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2602 	m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2603 	m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2604 	m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2605 	m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2606 
2607 	m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2608 	m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2609 	m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2610 	/* number of streams to pre-open on a association */
2611 	m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2612 
2613 	/* Add adaptation cookie */
2614 	m->adaptation_layer_indicator = 0;
2615 	m->adaptation_layer_indicator_provided = 0;
2616 
2617 	/* seed random number generator */
2618 	m->random_counter = 1;
2619 	m->store_at = SCTP_SIGNATURE_SIZE;
2620 	SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2621 	sctp_fill_random_store(m);
2622 
2623 	/* Minimum cookie size */
2624 	m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2625 	    sizeof(struct sctp_state_cookie);
2626 	m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2627 
2628 	/* Setup the initial secret */
2629 	(void)SCTP_GETTIME_TIMEVAL(&time);
2630 	m->time_of_secret_change = time.tv_sec;
2631 
2632 	for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2633 		m->secret_key[0][i] = sctp_select_initial_TSN(m);
2634 	}
2635 	sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2636 
2637 	/* How long is a cookie good for ? */
2638 	m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2639 	/*
2640 	 * Initialize authentication parameters
2641 	 */
2642 	m->local_hmacs = sctp_default_supported_hmaclist();
2643 	m->local_auth_chunks = sctp_alloc_chunklist();
2644 	if (inp->asconf_supported) {
2645 		sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2646 		sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2647 	}
2648 	m->default_dscp = 0;
2649 #ifdef INET6
2650 	m->default_flowlabel = 0;
2651 #endif
2652 	m->port = 0;		/* encapsulation disabled by default */
2653 	LIST_INIT(&m->shared_keys);
2654 	/* add default NULL key as key id 0 */
2655 	null_key = sctp_alloc_sharedkey();
2656 	sctp_insert_sharedkey(&m->shared_keys, null_key);
2657 	SCTP_INP_WUNLOCK(inp);
2658 #ifdef SCTP_LOG_CLOSING
2659 	sctp_log_closing(inp, NULL, 12);
2660 #endif
2661 	return (error);
2662 }
2663 
2664 
2665 void
2666 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2667     struct sctp_tcb *stcb)
2668 {
2669 	struct sctp_nets *net;
2670 	uint16_t lport, rport;
2671 	struct sctppcbhead *head;
2672 	struct sctp_laddr *laddr, *oladdr;
2673 
2674 	atomic_add_int(&stcb->asoc.refcnt, 1);
2675 	SCTP_TCB_UNLOCK(stcb);
2676 	SCTP_INP_INFO_WLOCK();
2677 	SCTP_INP_WLOCK(old_inp);
2678 	SCTP_INP_WLOCK(new_inp);
2679 	SCTP_TCB_LOCK(stcb);
2680 	atomic_subtract_int(&stcb->asoc.refcnt, 1);
2681 
2682 	new_inp->sctp_ep.time_of_secret_change =
2683 	    old_inp->sctp_ep.time_of_secret_change;
2684 	memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2685 	    sizeof(old_inp->sctp_ep.secret_key));
2686 	new_inp->sctp_ep.current_secret_number =
2687 	    old_inp->sctp_ep.current_secret_number;
2688 	new_inp->sctp_ep.last_secret_number =
2689 	    old_inp->sctp_ep.last_secret_number;
2690 	new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2691 
2692 	/* make it so new data pours into the new socket */
2693 	stcb->sctp_socket = new_inp->sctp_socket;
2694 	stcb->sctp_ep = new_inp;
2695 
2696 	/* Copy the port across */
2697 	lport = new_inp->sctp_lport = old_inp->sctp_lport;
2698 	rport = stcb->rport;
2699 	/* Pull the tcb from the old association */
2700 	LIST_REMOVE(stcb, sctp_tcbhash);
2701 	LIST_REMOVE(stcb, sctp_tcblist);
2702 	if (stcb->asoc.in_asocid_hash) {
2703 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
2704 	}
2705 	/* Now insert the new_inp into the TCP connected hash */
2706 	head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2707 
2708 	LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2709 	/* Its safe to access */
2710 	new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2711 
2712 	/* Now move the tcb into the endpoint list */
2713 	LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2714 	/*
2715 	 * Question, do we even need to worry about the ep-hash since we
2716 	 * only have one connection? Probably not :> so lets get rid of it
2717 	 * and not suck up any kernel memory in that.
2718 	 */
2719 	if (stcb->asoc.in_asocid_hash) {
2720 		struct sctpasochead *lhd;
2721 
2722 		lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2723 		    new_inp->hashasocidmark)];
2724 		LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2725 	}
2726 	/* Ok. Let's restart timer. */
2727 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2728 		sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2729 		    stcb, net);
2730 	}
2731 
2732 	SCTP_INP_INFO_WUNLOCK();
2733 	if (new_inp->sctp_tcbhash != NULL) {
2734 		SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2735 		new_inp->sctp_tcbhash = NULL;
2736 	}
2737 	if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2738 		/* Subset bound, so copy in the laddr list from the old_inp */
2739 		LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2740 			laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2741 			if (laddr == NULL) {
2742 				/*
2743 				 * Gak, what can we do? This assoc is really
2744 				 * HOSED. We probably should send an abort
2745 				 * here.
2746 				 */
2747 				SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2748 				continue;
2749 			}
2750 			SCTP_INCR_LADDR_COUNT();
2751 			bzero(laddr, sizeof(*laddr));
2752 			(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2753 			laddr->ifa = oladdr->ifa;
2754 			atomic_add_int(&laddr->ifa->refcount, 1);
2755 			LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2756 			    sctp_nxt_addr);
2757 			new_inp->laddr_count++;
2758 			if (oladdr == stcb->asoc.last_used_address) {
2759 				stcb->asoc.last_used_address = laddr;
2760 			}
2761 		}
2762 	}
2763 	/*
2764 	 * Now any running timers need to be adjusted since we really don't
2765 	 * care if they are running or not just blast in the new_inp into
2766 	 * all of them.
2767 	 */
2768 
2769 	stcb->asoc.dack_timer.ep = (void *)new_inp;
2770 	stcb->asoc.asconf_timer.ep = (void *)new_inp;
2771 	stcb->asoc.strreset_timer.ep = (void *)new_inp;
2772 	stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2773 	stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2774 	stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2775 	stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2776 	/* now what about the nets? */
2777 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2778 		net->pmtu_timer.ep = (void *)new_inp;
2779 		net->hb_timer.ep = (void *)new_inp;
2780 		net->rxt_timer.ep = (void *)new_inp;
2781 	}
2782 	SCTP_INP_WUNLOCK(new_inp);
2783 	SCTP_INP_WUNLOCK(old_inp);
2784 }
2785 
2786 /*
2787  * insert an laddr entry with the given ifa for the desired list
2788  */
2789 static int
2790 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2791 {
2792 	struct sctp_laddr *laddr;
2793 
2794 	laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2795 	if (laddr == NULL) {
2796 		/* out of memory? */
2797 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2798 		return (EINVAL);
2799 	}
2800 	SCTP_INCR_LADDR_COUNT();
2801 	bzero(laddr, sizeof(*laddr));
2802 	(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2803 	laddr->ifa = ifa;
2804 	laddr->action = act;
2805 	atomic_add_int(&ifa->refcount, 1);
2806 	/* insert it */
2807 	LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2808 
2809 	return (0);
2810 }
2811 
2812 /*
2813  * Remove an laddr entry from the local address list (on an assoc)
2814  */
2815 static void
2816 sctp_remove_laddr(struct sctp_laddr *laddr)
2817 {
2818 
2819 	/* remove from the list */
2820 	LIST_REMOVE(laddr, sctp_nxt_addr);
2821 	sctp_free_ifa(laddr->ifa);
2822 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2823 	SCTP_DECR_LADDR_COUNT();
2824 }
2825 
2826 
2827 
2828 /* sctp_ifap is used to bypass normal local address validation checks */
2829 int
2830 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2831     struct sctp_ifa *sctp_ifap, struct thread *p)
2832 {
2833 	/* bind a ep to a socket address */
2834 	struct sctppcbhead *head;
2835 	struct sctp_inpcb *inp, *inp_tmp;
2836 	struct inpcb *ip_inp;
2837 	int port_reuse_active = 0;
2838 	int bindall;
2839 	uint16_t lport;
2840 	int error;
2841 	uint32_t vrf_id;
2842 
2843 	lport = 0;
2844 	bindall = 1;
2845 	inp = (struct sctp_inpcb *)so->so_pcb;
2846 	ip_inp = (struct inpcb *)so->so_pcb;
2847 #ifdef SCTP_DEBUG
2848 	if (addr) {
2849 		SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2850 		    ntohs(((struct sockaddr_in *)addr)->sin_port));
2851 		SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2852 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2853 	}
2854 #endif
2855 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2856 		/* already did a bind, subsequent binds NOT allowed ! */
2857 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2858 		return (EINVAL);
2859 	}
2860 #ifdef INVARIANTS
2861 	if (p == NULL)
2862 		panic("null proc/thread");
2863 #endif
2864 	if (addr != NULL) {
2865 		switch (addr->sa_family) {
2866 #ifdef INET
2867 		case AF_INET:
2868 			{
2869 				struct sockaddr_in *sin;
2870 
2871 				/* IPV6_V6ONLY socket? */
2872 				if (SCTP_IPV6_V6ONLY(ip_inp)) {
2873 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2874 					return (EINVAL);
2875 				}
2876 				if (addr->sa_len != sizeof(*sin)) {
2877 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2878 					return (EINVAL);
2879 				}
2880 				sin = (struct sockaddr_in *)addr;
2881 				lport = sin->sin_port;
2882 				/*
2883 				 * For LOOPBACK the prison_local_ip4() call
2884 				 * will transmute the ip address to the
2885 				 * proper value.
2886 				 */
2887 				if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2888 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2889 					return (error);
2890 				}
2891 				if (sin->sin_addr.s_addr != INADDR_ANY) {
2892 					bindall = 0;
2893 				}
2894 				break;
2895 			}
2896 #endif
2897 #ifdef INET6
2898 		case AF_INET6:
2899 			{
2900 				/*
2901 				 * Only for pure IPv6 Address. (No IPv4
2902 				 * Mapped!)
2903 				 */
2904 				struct sockaddr_in6 *sin6;
2905 
2906 				sin6 = (struct sockaddr_in6 *)addr;
2907 
2908 				if (addr->sa_len != sizeof(*sin6)) {
2909 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2910 					return (EINVAL);
2911 				}
2912 				lport = sin6->sin6_port;
2913 				/*
2914 				 * For LOOPBACK the prison_local_ip6() call
2915 				 * will transmute the ipv6 address to the
2916 				 * proper value.
2917 				 */
2918 				if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2919 				    (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2920 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2921 					return (error);
2922 				}
2923 				if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2924 					bindall = 0;
2925 					/* KAME hack: embed scopeid */
2926 					if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2927 						SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2928 						return (EINVAL);
2929 					}
2930 				}
2931 				/* this must be cleared for ifa_ifwithaddr() */
2932 				sin6->sin6_scope_id = 0;
2933 				break;
2934 			}
2935 #endif
2936 		default:
2937 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2938 			return (EAFNOSUPPORT);
2939 		}
2940 	}
2941 	SCTP_INP_INFO_WLOCK();
2942 	SCTP_INP_WLOCK(inp);
2943 	/* Setup a vrf_id to be the default for the non-bind-all case. */
2944 	vrf_id = inp->def_vrf_id;
2945 
2946 	/* increase our count due to the unlock we do */
2947 	SCTP_INP_INCR_REF(inp);
2948 	if (lport) {
2949 		/*
2950 		 * Did the caller specify a port? if so we must see if an ep
2951 		 * already has this one bound.
2952 		 */
2953 		/* got to be root to get at low ports */
2954 		if (ntohs(lport) < IPPORT_RESERVED) {
2955 			if (p && (error =
2956 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
2957 			    )) {
2958 				SCTP_INP_DECR_REF(inp);
2959 				SCTP_INP_WUNLOCK(inp);
2960 				SCTP_INP_INFO_WUNLOCK();
2961 				return (error);
2962 			}
2963 		}
2964 		SCTP_INP_WUNLOCK(inp);
2965 		if (bindall) {
2966 			vrf_id = inp->def_vrf_id;
2967 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2968 			if (inp_tmp != NULL) {
2969 				/*
2970 				 * lock guy returned and lower count note
2971 				 * that we are not bound so inp_tmp should
2972 				 * NEVER be inp. And it is this inp
2973 				 * (inp_tmp) that gets the reference bump,
2974 				 * so we must lower it.
2975 				 */
2976 				SCTP_INP_DECR_REF(inp_tmp);
2977 				/* unlock info */
2978 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2979 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2980 					/*
2981 					 * Ok, must be one-2-one and
2982 					 * allowing port re-use
2983 					 */
2984 					port_reuse_active = 1;
2985 					goto continue_anyway;
2986 				}
2987 				SCTP_INP_DECR_REF(inp);
2988 				SCTP_INP_INFO_WUNLOCK();
2989 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2990 				return (EADDRINUSE);
2991 			}
2992 		} else {
2993 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2994 			if (inp_tmp != NULL) {
2995 				/*
2996 				 * lock guy returned and lower count note
2997 				 * that we are not bound so inp_tmp should
2998 				 * NEVER be inp. And it is this inp
2999 				 * (inp_tmp) that gets the reference bump,
3000 				 * so we must lower it.
3001 				 */
3002 				SCTP_INP_DECR_REF(inp_tmp);
3003 				/* unlock info */
3004 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3005 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3006 					/*
3007 					 * Ok, must be one-2-one and
3008 					 * allowing port re-use
3009 					 */
3010 					port_reuse_active = 1;
3011 					goto continue_anyway;
3012 				}
3013 				SCTP_INP_DECR_REF(inp);
3014 				SCTP_INP_INFO_WUNLOCK();
3015 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3016 				return (EADDRINUSE);
3017 			}
3018 		}
3019 continue_anyway:
3020 		SCTP_INP_WLOCK(inp);
3021 		if (bindall) {
3022 			/* verify that no lport is not used by a singleton */
3023 			if ((port_reuse_active == 0) &&
3024 			    (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3025 				/* Sorry someone already has this one bound */
3026 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3027 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3028 					port_reuse_active = 1;
3029 				} else {
3030 					SCTP_INP_DECR_REF(inp);
3031 					SCTP_INP_WUNLOCK(inp);
3032 					SCTP_INP_INFO_WUNLOCK();
3033 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3034 					return (EADDRINUSE);
3035 				}
3036 			}
3037 		}
3038 	} else {
3039 		uint16_t first, last, candidate;
3040 		uint16_t count;
3041 		int done;
3042 
3043 		if (ip_inp->inp_flags & INP_HIGHPORT) {
3044 			first = MODULE_GLOBAL(ipport_hifirstauto);
3045 			last = MODULE_GLOBAL(ipport_hilastauto);
3046 		} else if (ip_inp->inp_flags & INP_LOWPORT) {
3047 			if (p && (error =
3048 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
3049 			    )) {
3050 				SCTP_INP_DECR_REF(inp);
3051 				SCTP_INP_WUNLOCK(inp);
3052 				SCTP_INP_INFO_WUNLOCK();
3053 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3054 				return (error);
3055 			}
3056 			first = MODULE_GLOBAL(ipport_lowfirstauto);
3057 			last = MODULE_GLOBAL(ipport_lowlastauto);
3058 		} else {
3059 			first = MODULE_GLOBAL(ipport_firstauto);
3060 			last = MODULE_GLOBAL(ipport_lastauto);
3061 		}
3062 		if (first > last) {
3063 			uint16_t temp;
3064 
3065 			temp = first;
3066 			first = last;
3067 			last = temp;
3068 		}
3069 		count = last - first + 1;	/* number of candidates */
3070 		candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3071 
3072 		done = 0;
3073 		while (!done) {
3074 			if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3075 				done = 1;
3076 			}
3077 			if (!done) {
3078 				if (--count == 0) {
3079 					SCTP_INP_DECR_REF(inp);
3080 					SCTP_INP_WUNLOCK(inp);
3081 					SCTP_INP_INFO_WUNLOCK();
3082 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3083 					return (EADDRINUSE);
3084 				}
3085 				if (candidate == last)
3086 					candidate = first;
3087 				else
3088 					candidate = candidate + 1;
3089 			}
3090 		}
3091 		lport = htons(candidate);
3092 	}
3093 	SCTP_INP_DECR_REF(inp);
3094 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3095 	    SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3096 		/*
3097 		 * this really should not happen. The guy did a non-blocking
3098 		 * bind and then did a close at the same time.
3099 		 */
3100 		SCTP_INP_WUNLOCK(inp);
3101 		SCTP_INP_INFO_WUNLOCK();
3102 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3103 		return (EINVAL);
3104 	}
3105 	/* ok we look clear to give out this port, so lets setup the binding */
3106 	if (bindall) {
3107 		/* binding to all addresses, so just set in the proper flags */
3108 		inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3109 		/* set the automatic addr changes from kernel flag */
3110 		if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3111 			sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3112 			sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3113 		} else {
3114 			sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3115 			sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3116 		}
3117 		if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3118 			sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3119 		} else {
3120 			sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3121 		}
3122 		/*
3123 		 * set the automatic mobility_base from kernel flag (by
3124 		 * micchie)
3125 		 */
3126 		if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3127 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3128 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3129 		} else {
3130 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3131 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3132 		}
3133 		/*
3134 		 * set the automatic mobility_fasthandoff from kernel flag
3135 		 * (by micchie)
3136 		 */
3137 		if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3138 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3139 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3140 		} else {
3141 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3142 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3143 		}
3144 	} else {
3145 		/*
3146 		 * bind specific, make sure flags is off and add a new
3147 		 * address structure to the sctp_addr_list inside the ep
3148 		 * structure.
3149 		 *
3150 		 * We will need to allocate one and insert it at the head. The
3151 		 * socketopt call can just insert new addresses in there as
3152 		 * well. It will also have to do the embed scope kame hack
3153 		 * too (before adding).
3154 		 */
3155 		struct sctp_ifa *ifa;
3156 		union sctp_sockstore store;
3157 
3158 		memset(&store, 0, sizeof(store));
3159 		switch (addr->sa_family) {
3160 #ifdef INET
3161 		case AF_INET:
3162 			memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3163 			store.sin.sin_port = 0;
3164 			break;
3165 #endif
3166 #ifdef INET6
3167 		case AF_INET6:
3168 			memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3169 			store.sin6.sin6_port = 0;
3170 			break;
3171 #endif
3172 		default:
3173 			break;
3174 		}
3175 		/*
3176 		 * first find the interface with the bound address need to
3177 		 * zero out the port to find the address! yuck! can't do
3178 		 * this earlier since need port for sctp_pcb_findep()
3179 		 */
3180 		if (sctp_ifap != NULL) {
3181 			ifa = sctp_ifap;
3182 		} else {
3183 			/*
3184 			 * Note for BSD we hit here always other O/S's will
3185 			 * pass things in via the sctp_ifap argument
3186 			 * (Panda).
3187 			 */
3188 			ifa = sctp_find_ifa_by_addr(&store.sa,
3189 			    vrf_id, SCTP_ADDR_NOT_LOCKED);
3190 		}
3191 		if (ifa == NULL) {
3192 			/* Can't find an interface with that address */
3193 			SCTP_INP_WUNLOCK(inp);
3194 			SCTP_INP_INFO_WUNLOCK();
3195 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3196 			return (EADDRNOTAVAIL);
3197 		}
3198 #ifdef INET6
3199 		if (addr->sa_family == AF_INET6) {
3200 			/* GAK, more FIXME IFA lock? */
3201 			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3202 				/* Can't bind a non-existent addr. */
3203 				SCTP_INP_WUNLOCK(inp);
3204 				SCTP_INP_INFO_WUNLOCK();
3205 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3206 				return (EINVAL);
3207 			}
3208 		}
3209 #endif
3210 		/* we're not bound all */
3211 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3212 		/* allow bindx() to send ASCONF's for binding changes */
3213 		sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3214 		/* clear automatic addr changes from kernel flag */
3215 		sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3216 
3217 		/* add this address to the endpoint list */
3218 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3219 		if (error != 0) {
3220 			SCTP_INP_WUNLOCK(inp);
3221 			SCTP_INP_INFO_WUNLOCK();
3222 			return (error);
3223 		}
3224 		inp->laddr_count++;
3225 	}
3226 	/* find the bucket */
3227 	if (port_reuse_active) {
3228 		/* Put it into tcp 1-2-1 hash */
3229 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3230 		inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3231 	} else {
3232 		head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3233 	}
3234 	/* put it in the bucket */
3235 	LIST_INSERT_HEAD(head, inp, sctp_hash);
3236 	SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3237 	    (void *)head, ntohs(lport), port_reuse_active);
3238 	/* set in the port */
3239 	inp->sctp_lport = lport;
3240 
3241 	/* turn off just the unbound flag */
3242 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3243 	SCTP_INP_WUNLOCK(inp);
3244 	SCTP_INP_INFO_WUNLOCK();
3245 	return (0);
3246 }
3247 
3248 
3249 static void
3250 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3251 {
3252 	struct sctp_iterator *it, *nit;
3253 
3254 	/*
3255 	 * We enter with the only the ITERATOR_LOCK in place and a write
3256 	 * lock on the inp_info stuff.
3257 	 */
3258 	it = sctp_it_ctl.cur_it;
3259 	if (it && (it->vn != curvnet)) {
3260 		/* Its not looking at our VNET */
3261 		return;
3262 	}
3263 	if (it && (it->inp == inp)) {
3264 		/*
3265 		 * This is tricky and we hold the iterator lock, but when it
3266 		 * returns and gets the lock (when we release it) the
3267 		 * iterator will try to operate on inp. We need to stop that
3268 		 * from happening. But of course the iterator has a
3269 		 * reference on the stcb and inp. We can mark it and it will
3270 		 * stop.
3271 		 *
3272 		 * If its a single iterator situation, we set the end iterator
3273 		 * flag. Otherwise we set the iterator to go to the next
3274 		 * inp.
3275 		 *
3276 		 */
3277 		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3278 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3279 		} else {
3280 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3281 		}
3282 	}
3283 	/*
3284 	 * Now go through and remove any single reference to our inp that
3285 	 * may be still pending on the list
3286 	 */
3287 	SCTP_IPI_ITERATOR_WQ_LOCK();
3288 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3289 		if (it->vn != curvnet) {
3290 			continue;
3291 		}
3292 		if (it->inp == inp) {
3293 			/* This one points to me is it inp specific? */
3294 			if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3295 				/* Remove and free this one */
3296 				TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3297 				    it, sctp_nxt_itr);
3298 				if (it->function_atend != NULL) {
3299 					(*it->function_atend) (it->pointer, it->val);
3300 				}
3301 				SCTP_FREE(it, SCTP_M_ITER);
3302 			} else {
3303 				it->inp = LIST_NEXT(it->inp, sctp_list);
3304 				if (it->inp) {
3305 					SCTP_INP_INCR_REF(it->inp);
3306 				}
3307 			}
3308 			/*
3309 			 * When its put in the refcnt is incremented so decr
3310 			 * it
3311 			 */
3312 			SCTP_INP_DECR_REF(inp);
3313 		}
3314 	}
3315 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
3316 }
3317 
3318 /* release sctp_inpcb unbind the port */
3319 void
3320 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3321 {
3322 	/*
3323 	 * Here we free a endpoint. We must find it (if it is in the Hash
3324 	 * table) and remove it from there. Then we must also find it in the
3325 	 * overall list and remove it from there. After all removals are
3326 	 * complete then any timer has to be stopped. Then start the actual
3327 	 * freeing. a) Any local lists. b) Any associations. c) The hash of
3328 	 * all associations. d) finally the ep itself.
3329 	 */
3330 	struct sctp_tcb *asoc, *nasoc;
3331 	struct sctp_laddr *laddr, *nladdr;
3332 	struct inpcb *ip_pcb;
3333 	struct socket *so;
3334 	int being_refed = 0;
3335 	struct sctp_queued_to_read *sq, *nsq;
3336 	int cnt;
3337 	sctp_sharedkey_t *shared_key, *nshared_key;
3338 
3339 
3340 #ifdef SCTP_LOG_CLOSING
3341 	sctp_log_closing(inp, NULL, 0);
3342 #endif
3343 	SCTP_ITERATOR_LOCK();
3344 	/* mark any iterators on the list or being processed */
3345 	sctp_iterator_inp_being_freed(inp);
3346 	SCTP_ITERATOR_UNLOCK();
3347 	so = inp->sctp_socket;
3348 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3349 		/* been here before.. eeks.. get out of here */
3350 		SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3351 #ifdef SCTP_LOG_CLOSING
3352 		sctp_log_closing(inp, NULL, 1);
3353 #endif
3354 		return;
3355 	}
3356 	SCTP_ASOC_CREATE_LOCK(inp);
3357 	SCTP_INP_INFO_WLOCK();
3358 
3359 	SCTP_INP_WLOCK(inp);
3360 	if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3361 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3362 		/* socket is gone, so no more wakeups allowed */
3363 		inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3364 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3365 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3366 
3367 	}
3368 	/* First time through we have the socket lock, after that no more. */
3369 	sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3370 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3371 
3372 	if (inp->control) {
3373 		sctp_m_freem(inp->control);
3374 		inp->control = NULL;
3375 	}
3376 	if (inp->pkt) {
3377 		sctp_m_freem(inp->pkt);
3378 		inp->pkt = NULL;
3379 	}
3380 	ip_pcb = &inp->ip_inp.inp;	/* we could just cast the main pointer
3381 					 * here but I will be nice :> (i.e.
3382 					 * ip_pcb = ep;) */
3383 	if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3384 		int cnt_in_sd;
3385 
3386 		cnt_in_sd = 0;
3387 		LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3388 			SCTP_TCB_LOCK(asoc);
3389 			if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3390 				/* Skip guys being freed */
3391 				cnt_in_sd++;
3392 				if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3393 					/*
3394 					 * Special case - we did not start a
3395 					 * kill timer on the asoc due to it
3396 					 * was not closed. So go ahead and
3397 					 * start it now.
3398 					 */
3399 					asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3400 					sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3401 				}
3402 				SCTP_TCB_UNLOCK(asoc);
3403 				continue;
3404 			}
3405 			if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3406 			    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3407 			    (asoc->asoc.total_output_queue_size == 0)) {
3408 				/*
3409 				 * If we have data in queue, we don't want
3410 				 * to just free since the app may have done,
3411 				 * send()/close or connect/send/close. And
3412 				 * it wants the data to get across first.
3413 				 */
3414 				/* Just abandon things in the front states */
3415 				if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3416 				    SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3417 					cnt_in_sd++;
3418 				}
3419 				continue;
3420 			}
3421 			/* Disconnect the socket please */
3422 			asoc->sctp_socket = NULL;
3423 			asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3424 			if ((asoc->asoc.size_on_reasm_queue > 0) ||
3425 			    (asoc->asoc.control_pdapi) ||
3426 			    (asoc->asoc.size_on_all_streams > 0) ||
3427 			    (so && (so->so_rcv.sb_cc > 0))) {
3428 				/* Left with Data unread */
3429 				struct mbuf *op_err;
3430 
3431 				op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3432 				asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3433 				sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3434 				SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3435 				if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3436 				    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3437 					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3438 				}
3439 				if (sctp_free_assoc(inp, asoc,
3440 				    SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3441 					cnt_in_sd++;
3442 				}
3443 				continue;
3444 			} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3445 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3446 			    (asoc->asoc.stream_queue_cnt == 0)) {
3447 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3448 					goto abort_anyway;
3449 				}
3450 				if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3451 				    (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3452 					struct sctp_nets *netp;
3453 
3454 					/*
3455 					 * there is nothing queued to send,
3456 					 * so I send shutdown
3457 					 */
3458 					if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3459 					    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3460 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3461 					}
3462 					SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3463 					SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3464 					sctp_stop_timers_for_shutdown(asoc);
3465 					if (asoc->asoc.alternate) {
3466 						netp = asoc->asoc.alternate;
3467 					} else {
3468 						netp = asoc->asoc.primary_destination;
3469 					}
3470 					sctp_send_shutdown(asoc, netp);
3471 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3472 					    netp);
3473 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3474 					    asoc->asoc.primary_destination);
3475 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3476 				}
3477 			} else {
3478 				/* mark into shutdown pending */
3479 				asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3480 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3481 				    asoc->asoc.primary_destination);
3482 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3483 					asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3484 				}
3485 				if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3486 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3487 				    (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3488 					struct mbuf *op_err;
3489 
3490 			abort_anyway:
3491 					op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3492 					asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3493 					sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3494 					SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3495 					if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3496 					    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3497 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3498 					}
3499 					if (sctp_free_assoc(inp, asoc,
3500 					    SCTP_PCBFREE_NOFORCE,
3501 					    SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3502 						cnt_in_sd++;
3503 					}
3504 					continue;
3505 				} else {
3506 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3507 				}
3508 			}
3509 			cnt_in_sd++;
3510 			SCTP_TCB_UNLOCK(asoc);
3511 		}
3512 		/* now is there some left in our SHUTDOWN state? */
3513 		if (cnt_in_sd) {
3514 #ifdef SCTP_LOG_CLOSING
3515 			sctp_log_closing(inp, NULL, 2);
3516 #endif
3517 			inp->sctp_socket = NULL;
3518 			SCTP_INP_WUNLOCK(inp);
3519 			SCTP_ASOC_CREATE_UNLOCK(inp);
3520 			SCTP_INP_INFO_WUNLOCK();
3521 			return;
3522 		}
3523 	}
3524 	inp->sctp_socket = NULL;
3525 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3526 	    SCTP_PCB_FLAGS_UNBOUND) {
3527 		/*
3528 		 * ok, this guy has been bound. It's port is somewhere in
3529 		 * the SCTP_BASE_INFO(hash table). Remove it!
3530 		 */
3531 		LIST_REMOVE(inp, sctp_hash);
3532 		inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3533 	}
3534 	/*
3535 	 * If there is a timer running to kill us, forget it, since it may
3536 	 * have a contest on the INP lock.. which would cause us to die ...
3537 	 */
3538 	cnt = 0;
3539 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3540 		SCTP_TCB_LOCK(asoc);
3541 		if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3542 			if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3543 				asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3544 				sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3545 			}
3546 			cnt++;
3547 			SCTP_TCB_UNLOCK(asoc);
3548 			continue;
3549 		}
3550 		/* Free associations that are NOT killing us */
3551 		if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3552 		    ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3553 			struct mbuf *op_err;
3554 
3555 			op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3556 			asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3557 			sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3558 			SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3559 		} else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3560 			cnt++;
3561 			SCTP_TCB_UNLOCK(asoc);
3562 			continue;
3563 		}
3564 		if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3565 		    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3566 			SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3567 		}
3568 		if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3569 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3570 			cnt++;
3571 		}
3572 	}
3573 	if (cnt) {
3574 		/* Ok we have someone out there that will kill us */
3575 		(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3576 #ifdef SCTP_LOG_CLOSING
3577 		sctp_log_closing(inp, NULL, 3);
3578 #endif
3579 		SCTP_INP_WUNLOCK(inp);
3580 		SCTP_ASOC_CREATE_UNLOCK(inp);
3581 		SCTP_INP_INFO_WUNLOCK();
3582 		return;
3583 	}
3584 	if (SCTP_INP_LOCK_CONTENDED(inp))
3585 		being_refed++;
3586 	if (SCTP_INP_READ_CONTENDED(inp))
3587 		being_refed++;
3588 	if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3589 		being_refed++;
3590 
3591 	if ((inp->refcount) ||
3592 	    (being_refed) ||
3593 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3594 		(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3595 #ifdef SCTP_LOG_CLOSING
3596 		sctp_log_closing(inp, NULL, 4);
3597 #endif
3598 		sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3599 		SCTP_INP_WUNLOCK(inp);
3600 		SCTP_ASOC_CREATE_UNLOCK(inp);
3601 		SCTP_INP_INFO_WUNLOCK();
3602 		return;
3603 	}
3604 	inp->sctp_ep.signature_change.type = 0;
3605 	inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3606 	/*
3607 	 * Remove it from the list .. last thing we need a lock for.
3608 	 */
3609 	LIST_REMOVE(inp, sctp_list);
3610 	SCTP_INP_WUNLOCK(inp);
3611 	SCTP_ASOC_CREATE_UNLOCK(inp);
3612 	SCTP_INP_INFO_WUNLOCK();
3613 	/*
3614 	 * Now we release all locks. Since this INP cannot be found anymore
3615 	 * except possibly by the kill timer that might be running. We call
3616 	 * the drain function here. It should hit the case were it sees the
3617 	 * ACTIVE flag cleared and exit out freeing us to proceed and
3618 	 * destroy everything.
3619 	 */
3620 	if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3621 		(void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3622 	} else {
3623 		/* Probably un-needed */
3624 		(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3625 	}
3626 
3627 #ifdef SCTP_LOG_CLOSING
3628 	sctp_log_closing(inp, NULL, 5);
3629 #endif
3630 
3631 
3632 	if ((inp->sctp_asocidhash) != NULL) {
3633 		SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3634 		inp->sctp_asocidhash = NULL;
3635 	}
3636 	/* sa_ignore FREED_MEMORY */
3637 	TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3638 		/* Its only abandoned if it had data left */
3639 		if (sq->length)
3640 			SCTP_STAT_INCR(sctps_left_abandon);
3641 
3642 		TAILQ_REMOVE(&inp->read_queue, sq, next);
3643 		sctp_free_remote_addr(sq->whoFrom);
3644 		if (so)
3645 			so->so_rcv.sb_cc -= sq->length;
3646 		if (sq->data) {
3647 			sctp_m_freem(sq->data);
3648 			sq->data = NULL;
3649 		}
3650 		/*
3651 		 * no need to free the net count, since at this point all
3652 		 * assoc's are gone.
3653 		 */
3654 		sctp_free_a_readq(NULL, sq);
3655 	}
3656 	/* Now the sctp_pcb things */
3657 	/*
3658 	 * free each asoc if it is not already closed/free. we can't use the
3659 	 * macro here since le_next will get freed as part of the
3660 	 * sctp_free_assoc() call.
3661 	 */
3662 #ifdef IPSEC
3663 	ipsec_delete_pcbpolicy(ip_pcb);
3664 #endif
3665 	if (ip_pcb->inp_options) {
3666 		(void)sctp_m_free(ip_pcb->inp_options);
3667 		ip_pcb->inp_options = 0;
3668 	}
3669 #ifdef INET6
3670 	if (ip_pcb->inp_vflag & INP_IPV6) {
3671 		struct in6pcb *in6p;
3672 
3673 		in6p = (struct in6pcb *)inp;
3674 		ip6_freepcbopts(in6p->in6p_outputopts);
3675 	}
3676 #endif				/* INET6 */
3677 	ip_pcb->inp_vflag = 0;
3678 	/* free up authentication fields */
3679 	if (inp->sctp_ep.local_auth_chunks != NULL)
3680 		sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3681 	if (inp->sctp_ep.local_hmacs != NULL)
3682 		sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3683 
3684 	LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3685 		LIST_REMOVE(shared_key, next);
3686 		sctp_free_sharedkey(shared_key);
3687 		/* sa_ignore FREED_MEMORY */
3688 	}
3689 
3690 	/*
3691 	 * if we have an address list the following will free the list of
3692 	 * ifaddr's that are set into this ep. Again macro limitations here,
3693 	 * since the LIST_FOREACH could be a bad idea.
3694 	 */
3695 	LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3696 		sctp_remove_laddr(laddr);
3697 	}
3698 
3699 #ifdef SCTP_TRACK_FREED_ASOCS
3700 	/* TEMP CODE */
3701 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3702 		LIST_REMOVE(asoc, sctp_tcblist);
3703 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3704 		SCTP_DECR_ASOC_COUNT();
3705 	}
3706 	/* *** END TEMP CODE *** */
3707 #endif
3708 	/* Now lets see about freeing the EP hash table. */
3709 	if (inp->sctp_tcbhash != NULL) {
3710 		SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3711 		inp->sctp_tcbhash = NULL;
3712 	}
3713 	/* Now we must put the ep memory back into the zone pool */
3714 	crfree(inp->ip_inp.inp.inp_cred);
3715 	INP_LOCK_DESTROY(&inp->ip_inp.inp);
3716 	SCTP_INP_LOCK_DESTROY(inp);
3717 	SCTP_INP_READ_DESTROY(inp);
3718 	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3719 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3720 	SCTP_DECR_EP_COUNT();
3721 }
3722 
3723 
3724 struct sctp_nets *
3725 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3726 {
3727 	struct sctp_nets *net;
3728 
3729 	/* locate the address */
3730 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3731 		if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3732 			return (net);
3733 	}
3734 	return (NULL);
3735 }
3736 
3737 
3738 int
3739 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3740 {
3741 	struct sctp_ifa *sctp_ifa;
3742 
3743 	sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3744 	if (sctp_ifa) {
3745 		return (1);
3746 	} else {
3747 		return (0);
3748 	}
3749 }
3750 
3751 /*
3752  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3753  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3754  * stats of stuff.
3755  */
3756 int
3757 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3758     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3759 {
3760 	/*
3761 	 * The following is redundant to the same lines in the
3762 	 * sctp_aloc_assoc() but is needed since others call the add address
3763 	 * function
3764 	 */
3765 	struct sctp_nets *net, *netfirst;
3766 	int addr_inscope;
3767 
3768 	SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3769 	    from);
3770 	SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3771 
3772 	netfirst = sctp_findnet(stcb, newaddr);
3773 	if (netfirst) {
3774 		/*
3775 		 * Lie and return ok, we don't want to make the association
3776 		 * go away for this behavior. It will happen in the TCP
3777 		 * model in a connected socket. It does not reach the hash
3778 		 * table until after the association is built so it can't be
3779 		 * found. Mark as reachable, since the initial creation will
3780 		 * have been cleared and the NOT_IN_ASSOC flag will have
3781 		 * been added... and we don't want to end up removing it
3782 		 * back out.
3783 		 */
3784 		if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3785 			netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3786 			    SCTP_ADDR_UNCONFIRMED);
3787 		} else {
3788 			netfirst->dest_state = SCTP_ADDR_REACHABLE;
3789 		}
3790 
3791 		return (0);
3792 	}
3793 	addr_inscope = 1;
3794 	switch (newaddr->sa_family) {
3795 #ifdef INET
3796 	case AF_INET:
3797 		{
3798 			struct sockaddr_in *sin;
3799 
3800 			sin = (struct sockaddr_in *)newaddr;
3801 			if (sin->sin_addr.s_addr == 0) {
3802 				/* Invalid address */
3803 				return (-1);
3804 			}
3805 			/* zero out the bzero area */
3806 			memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3807 
3808 			/* assure len is set */
3809 			sin->sin_len = sizeof(struct sockaddr_in);
3810 			if (set_scope) {
3811 				if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3812 					stcb->asoc.scope.ipv4_local_scope = 1;
3813 				}
3814 			} else {
3815 				/* Validate the address is in scope */
3816 				if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3817 				    (stcb->asoc.scope.ipv4_local_scope == 0)) {
3818 					addr_inscope = 0;
3819 				}
3820 			}
3821 			break;
3822 		}
3823 #endif
3824 #ifdef INET6
3825 	case AF_INET6:
3826 		{
3827 			struct sockaddr_in6 *sin6;
3828 
3829 			sin6 = (struct sockaddr_in6 *)newaddr;
3830 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3831 				/* Invalid address */
3832 				return (-1);
3833 			}
3834 			/* assure len is set */
3835 			sin6->sin6_len = sizeof(struct sockaddr_in6);
3836 			if (set_scope) {
3837 				if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3838 					stcb->asoc.scope.loopback_scope = 1;
3839 					stcb->asoc.scope.local_scope = 0;
3840 					stcb->asoc.scope.ipv4_local_scope = 1;
3841 					stcb->asoc.scope.site_scope = 1;
3842 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3843 					/*
3844 					 * If the new destination is a
3845 					 * LINK_LOCAL we must have common
3846 					 * site scope. Don't set the local
3847 					 * scope since we may not share all
3848 					 * links, only loopback can do this.
3849 					 * Links on the local network would
3850 					 * also be on our private network
3851 					 * for v4 too.
3852 					 */
3853 					stcb->asoc.scope.ipv4_local_scope = 1;
3854 					stcb->asoc.scope.site_scope = 1;
3855 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3856 					/*
3857 					 * If the new destination is
3858 					 * SITE_LOCAL then we must have site
3859 					 * scope in common.
3860 					 */
3861 					stcb->asoc.scope.site_scope = 1;
3862 				}
3863 			} else {
3864 				/* Validate the address is in scope */
3865 				if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3866 				    (stcb->asoc.scope.loopback_scope == 0)) {
3867 					addr_inscope = 0;
3868 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3869 				    (stcb->asoc.scope.local_scope == 0)) {
3870 					addr_inscope = 0;
3871 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3872 				    (stcb->asoc.scope.site_scope == 0)) {
3873 					addr_inscope = 0;
3874 				}
3875 			}
3876 			break;
3877 		}
3878 #endif
3879 	default:
3880 		/* not supported family type */
3881 		return (-1);
3882 	}
3883 	net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3884 	if (net == NULL) {
3885 		return (-1);
3886 	}
3887 	SCTP_INCR_RADDR_COUNT();
3888 	bzero(net, sizeof(struct sctp_nets));
3889 	(void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3890 	memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3891 	switch (newaddr->sa_family) {
3892 #ifdef INET
3893 	case AF_INET:
3894 		((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3895 		break;
3896 #endif
3897 #ifdef INET6
3898 	case AF_INET6:
3899 		((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3900 		break;
3901 #endif
3902 	default:
3903 		break;
3904 	}
3905 	net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3906 	if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3907 		stcb->asoc.scope.loopback_scope = 1;
3908 		stcb->asoc.scope.ipv4_local_scope = 1;
3909 		stcb->asoc.scope.local_scope = 0;
3910 		stcb->asoc.scope.site_scope = 1;
3911 		addr_inscope = 1;
3912 	}
3913 	net->failure_threshold = stcb->asoc.def_net_failure;
3914 	net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3915 	if (addr_inscope == 0) {
3916 		net->dest_state = (SCTP_ADDR_REACHABLE |
3917 		    SCTP_ADDR_OUT_OF_SCOPE);
3918 	} else {
3919 		if (from == SCTP_ADDR_IS_CONFIRMED)
3920 			/* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3921 			net->dest_state = SCTP_ADDR_REACHABLE;
3922 		else
3923 			net->dest_state = SCTP_ADDR_REACHABLE |
3924 			    SCTP_ADDR_UNCONFIRMED;
3925 	}
3926 	/*
3927 	 * We set this to 0, the timer code knows that this means its an
3928 	 * initial value
3929 	 */
3930 	net->rto_needed = 1;
3931 	net->RTO = 0;
3932 	net->RTO_measured = 0;
3933 	stcb->asoc.numnets++;
3934 	net->ref_count = 1;
3935 	net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3936 	net->port = port;
3937 	net->dscp = stcb->asoc.default_dscp;
3938 #ifdef INET6
3939 	net->flowlabel = stcb->asoc.default_flowlabel;
3940 #endif
3941 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3942 		net->dest_state |= SCTP_ADDR_NOHB;
3943 	} else {
3944 		net->dest_state &= ~SCTP_ADDR_NOHB;
3945 	}
3946 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3947 		net->dest_state |= SCTP_ADDR_NO_PMTUD;
3948 	} else {
3949 		net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3950 	}
3951 	net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3952 	/* Init the timer structure */
3953 	SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3954 	SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3955 	SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3956 
3957 	/* Now generate a route for this guy */
3958 #ifdef INET6
3959 	/* KAME hack: embed scopeid */
3960 	if (newaddr->sa_family == AF_INET6) {
3961 		struct sockaddr_in6 *sin6;
3962 
3963 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3964 		(void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3965 		sin6->sin6_scope_id = 0;
3966 	}
3967 #endif
3968 	SCTP_RTALLOC((sctp_route_t *) & net->ro,
3969 	    stcb->asoc.vrf_id,
3970 	    stcb->sctp_ep->fibnum);
3971 
3972 	if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3973 		/* Get source address */
3974 		net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3975 		    stcb,
3976 		    (sctp_route_t *) & net->ro,
3977 		    net,
3978 		    0,
3979 		    stcb->asoc.vrf_id);
3980 		if (net->ro._s_addr != NULL) {
3981 			net->src_addr_selected = 1;
3982 			/* Now get the interface MTU */
3983 			if (net->ro._s_addr->ifn_p != NULL) {
3984 				net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3985 			}
3986 		} else {
3987 			net->src_addr_selected = 0;
3988 		}
3989 		if (net->mtu > 0) {
3990 			uint32_t rmtu;
3991 
3992 			rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3993 			if (rmtu == 0) {
3994 				/*
3995 				 * Start things off to match mtu of
3996 				 * interface please.
3997 				 */
3998 				SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3999 				    net->ro.ro_rt, net->mtu);
4000 			} else {
4001 				/*
4002 				 * we take the route mtu over the interface,
4003 				 * since the route may be leading out the
4004 				 * loopback, or a different interface.
4005 				 */
4006 				net->mtu = rmtu;
4007 			}
4008 		}
4009 	} else {
4010 		net->src_addr_selected = 0;
4011 	}
4012 	if (net->mtu == 0) {
4013 		switch (newaddr->sa_family) {
4014 #ifdef INET
4015 		case AF_INET:
4016 			net->mtu = SCTP_DEFAULT_MTU;
4017 			break;
4018 #endif
4019 #ifdef INET6
4020 		case AF_INET6:
4021 			net->mtu = 1280;
4022 			break;
4023 #endif
4024 		default:
4025 			break;
4026 		}
4027 	}
4028 #if defined(INET) || defined(INET6)
4029 	if (net->port) {
4030 		net->mtu -= (uint32_t) sizeof(struct udphdr);
4031 	}
4032 #endif
4033 	if (from == SCTP_ALLOC_ASOC) {
4034 		stcb->asoc.smallest_mtu = net->mtu;
4035 	}
4036 	if (stcb->asoc.smallest_mtu > net->mtu) {
4037 		sctp_pathmtu_adjustment(stcb, net->mtu);
4038 	}
4039 #ifdef INET6
4040 	if (newaddr->sa_family == AF_INET6) {
4041 		struct sockaddr_in6 *sin6;
4042 
4043 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4044 		(void)sa6_recoverscope(sin6);
4045 	}
4046 #endif
4047 
4048 	/* JRS - Use the congestion control given in the CC module */
4049 	if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4050 		(*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4051 
4052 	/*
4053 	 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4054 	 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4055 	 */
4056 	net->find_pseudo_cumack = 1;
4057 	net->find_rtx_pseudo_cumack = 1;
4058 	/* Choose an initial flowid. */
4059 	net->flowid = stcb->asoc.my_vtag ^
4060 	    ntohs(stcb->rport) ^
4061 	    ntohs(stcb->sctp_ep->sctp_lport);
4062 	net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4063 	if (netp) {
4064 		*netp = net;
4065 	}
4066 	netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4067 	if (net->ro.ro_rt == NULL) {
4068 		/* Since we have no route put it at the back */
4069 		TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4070 	} else if (netfirst == NULL) {
4071 		/* We are the first one in the pool. */
4072 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4073 	} else if (netfirst->ro.ro_rt == NULL) {
4074 		/*
4075 		 * First one has NO route. Place this one ahead of the first
4076 		 * one.
4077 		 */
4078 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4079 	} else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4080 		/*
4081 		 * This one has a different interface than the one at the
4082 		 * top of the list. Place it ahead.
4083 		 */
4084 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4085 	} else {
4086 		/*
4087 		 * Ok we have the same interface as the first one. Move
4088 		 * forward until we find either a) one with a NULL route...
4089 		 * insert ahead of that b) one with a different ifp.. insert
4090 		 * after that. c) end of the list.. insert at the tail.
4091 		 */
4092 		struct sctp_nets *netlook;
4093 
4094 		do {
4095 			netlook = TAILQ_NEXT(netfirst, sctp_next);
4096 			if (netlook == NULL) {
4097 				/* End of the list */
4098 				TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4099 				break;
4100 			} else if (netlook->ro.ro_rt == NULL) {
4101 				/* next one has NO route */
4102 				TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4103 				break;
4104 			} else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4105 				TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4106 				    net, sctp_next);
4107 				break;
4108 			}
4109 			/* Shift forward */
4110 			netfirst = netlook;
4111 		} while (netlook != NULL);
4112 	}
4113 
4114 	/* got to have a primary set */
4115 	if (stcb->asoc.primary_destination == 0) {
4116 		stcb->asoc.primary_destination = net;
4117 	} else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4118 		    (net->ro.ro_rt) &&
4119 	    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4120 		/* No route to current primary adopt new primary */
4121 		stcb->asoc.primary_destination = net;
4122 	}
4123 	/* Validate primary is first */
4124 	net = TAILQ_FIRST(&stcb->asoc.nets);
4125 	if ((net != stcb->asoc.primary_destination) &&
4126 	    (stcb->asoc.primary_destination)) {
4127 		/*
4128 		 * first one on the list is NOT the primary sctp_cmpaddr()
4129 		 * is much more efficient if the primary is the first on the
4130 		 * list, make it so.
4131 		 */
4132 		TAILQ_REMOVE(&stcb->asoc.nets,
4133 		    stcb->asoc.primary_destination, sctp_next);
4134 		TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4135 		    stcb->asoc.primary_destination, sctp_next);
4136 	}
4137 	return (0);
4138 }
4139 
4140 
4141 static uint32_t
4142 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4143 {
4144 	uint32_t id;
4145 	struct sctpasochead *head;
4146 	struct sctp_tcb *lstcb;
4147 
4148 	SCTP_INP_WLOCK(inp);
4149 try_again:
4150 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4151 		/* TSNH */
4152 		SCTP_INP_WUNLOCK(inp);
4153 		return (0);
4154 	}
4155 	/*
4156 	 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4157 	 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4158 	 */
4159 	if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4160 		inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4161 	}
4162 	id = inp->sctp_associd_counter;
4163 	inp->sctp_associd_counter++;
4164 	lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4165 	if (lstcb) {
4166 		goto try_again;
4167 	}
4168 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4169 	LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4170 	stcb->asoc.in_asocid_hash = 1;
4171 	SCTP_INP_WUNLOCK(inp);
4172 	return id;
4173 }
4174 
4175 /*
4176  * allocate an association and add it to the endpoint. The caller must be
4177  * careful to add all additional addresses once they are know right away or
4178  * else the assoc will be may experience a blackout scenario.
4179  */
4180 struct sctp_tcb *
4181 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4182     int *error, uint32_t override_tag, uint32_t vrf_id,
4183     uint16_t o_streams, uint16_t port,
4184     struct thread *p
4185 )
4186 {
4187 	/* note the p argument is only valid in unbound sockets */
4188 
4189 	struct sctp_tcb *stcb;
4190 	struct sctp_association *asoc;
4191 	struct sctpasochead *head;
4192 	uint16_t rport;
4193 	int err;
4194 
4195 	/*
4196 	 * Assumption made here: Caller has done a
4197 	 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4198 	 * address does not exist already.
4199 	 */
4200 	if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4201 		/* Hit max assoc, sorry no more */
4202 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4203 		*error = ENOBUFS;
4204 		return (NULL);
4205 	}
4206 	if (firstaddr == NULL) {
4207 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4208 		*error = EINVAL;
4209 		return (NULL);
4210 	}
4211 	SCTP_INP_RLOCK(inp);
4212 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4213 	    ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4214 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4215 		/*
4216 		 * If its in the TCP pool, its NOT allowed to create an
4217 		 * association. The parent listener needs to call
4218 		 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4219 		 * off, or connected one does this.. its an error.
4220 		 */
4221 		SCTP_INP_RUNLOCK(inp);
4222 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4223 		*error = EINVAL;
4224 		return (NULL);
4225 	}
4226 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4227 	    (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4228 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4229 		    (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4230 			SCTP_INP_RUNLOCK(inp);
4231 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4232 			*error = EINVAL;
4233 			return (NULL);
4234 		}
4235 	}
4236 	SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4237 #ifdef SCTP_DEBUG
4238 	if (firstaddr) {
4239 		SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4240 		switch (firstaddr->sa_family) {
4241 #ifdef INET
4242 		case AF_INET:
4243 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4244 			    ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4245 			break;
4246 #endif
4247 #ifdef INET6
4248 		case AF_INET6:
4249 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4250 			    ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4251 			break;
4252 #endif
4253 		default:
4254 			break;
4255 		}
4256 	} else {
4257 		SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4258 	}
4259 #endif				/* SCTP_DEBUG */
4260 	switch (firstaddr->sa_family) {
4261 #ifdef INET
4262 	case AF_INET:
4263 		{
4264 			struct sockaddr_in *sin;
4265 
4266 			sin = (struct sockaddr_in *)firstaddr;
4267 			if ((ntohs(sin->sin_port) == 0) ||
4268 			    (sin->sin_addr.s_addr == INADDR_ANY) ||
4269 			    (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4270 			    IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4271 				/* Invalid address */
4272 				SCTP_INP_RUNLOCK(inp);
4273 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4274 				*error = EINVAL;
4275 				return (NULL);
4276 			}
4277 			rport = sin->sin_port;
4278 			break;
4279 		}
4280 #endif
4281 #ifdef INET6
4282 	case AF_INET6:
4283 		{
4284 			struct sockaddr_in6 *sin6;
4285 
4286 			sin6 = (struct sockaddr_in6 *)firstaddr;
4287 			if ((ntohs(sin6->sin6_port) == 0) ||
4288 			    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4289 			    IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4290 				/* Invalid address */
4291 				SCTP_INP_RUNLOCK(inp);
4292 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4293 				*error = EINVAL;
4294 				return (NULL);
4295 			}
4296 			rport = sin6->sin6_port;
4297 			break;
4298 		}
4299 #endif
4300 	default:
4301 		/* not supported family type */
4302 		SCTP_INP_RUNLOCK(inp);
4303 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4304 		*error = EINVAL;
4305 		return (NULL);
4306 	}
4307 	SCTP_INP_RUNLOCK(inp);
4308 	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4309 		/*
4310 		 * If you have not performed a bind, then we need to do the
4311 		 * ephemeral bind for you.
4312 		 */
4313 		if ((err = sctp_inpcb_bind(inp->sctp_socket,
4314 		    (struct sockaddr *)NULL,
4315 		    (struct sctp_ifa *)NULL,
4316 		    p
4317 		    ))) {
4318 			/* bind error, probably perm */
4319 			*error = err;
4320 			return (NULL);
4321 		}
4322 	}
4323 	stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4324 	if (stcb == NULL) {
4325 		/* out of memory? */
4326 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4327 		*error = ENOMEM;
4328 		return (NULL);
4329 	}
4330 	SCTP_INCR_ASOC_COUNT();
4331 
4332 	bzero(stcb, sizeof(*stcb));
4333 	asoc = &stcb->asoc;
4334 
4335 	asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4336 	SCTP_TCB_LOCK_INIT(stcb);
4337 	SCTP_TCB_SEND_LOCK_INIT(stcb);
4338 	stcb->rport = rport;
4339 	/* setup back pointer's */
4340 	stcb->sctp_ep = inp;
4341 	stcb->sctp_socket = inp->sctp_socket;
4342 	if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4343 		/* failed */
4344 		SCTP_TCB_LOCK_DESTROY(stcb);
4345 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4346 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4347 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4348 		SCTP_DECR_ASOC_COUNT();
4349 		*error = err;
4350 		return (NULL);
4351 	}
4352 	/* and the port */
4353 	SCTP_INP_INFO_WLOCK();
4354 	SCTP_INP_WLOCK(inp);
4355 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4356 		/* inpcb freed while alloc going on */
4357 		SCTP_TCB_LOCK_DESTROY(stcb);
4358 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4359 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4360 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4361 		SCTP_INP_WUNLOCK(inp);
4362 		SCTP_INP_INFO_WUNLOCK();
4363 		SCTP_DECR_ASOC_COUNT();
4364 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4365 		*error = EINVAL;
4366 		return (NULL);
4367 	}
4368 	SCTP_TCB_LOCK(stcb);
4369 
4370 	/* now that my_vtag is set, add it to the hash */
4371 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4372 	/* put it in the bucket in the vtag hash of assoc's for the system */
4373 	LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4374 	SCTP_INP_INFO_WUNLOCK();
4375 
4376 	if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4377 		/* failure.. memory error? */
4378 		if (asoc->strmout) {
4379 			SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4380 			asoc->strmout = NULL;
4381 		}
4382 		if (asoc->mapping_array) {
4383 			SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4384 			asoc->mapping_array = NULL;
4385 		}
4386 		if (asoc->nr_mapping_array) {
4387 			SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4388 			asoc->nr_mapping_array = NULL;
4389 		}
4390 		SCTP_DECR_ASOC_COUNT();
4391 		SCTP_TCB_UNLOCK(stcb);
4392 		SCTP_TCB_LOCK_DESTROY(stcb);
4393 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4394 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4395 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4396 		SCTP_INP_WUNLOCK(inp);
4397 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4398 		*error = ENOBUFS;
4399 		return (NULL);
4400 	}
4401 	/* Init all the timers */
4402 	SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4403 	SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4404 	SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4405 	SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4406 	SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4407 	SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4408 	SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4409 
4410 	LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4411 	/* now file the port under the hash as well */
4412 	if (inp->sctp_tcbhash != NULL) {
4413 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4414 		    inp->sctp_hashmark)];
4415 		LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4416 	}
4417 	SCTP_INP_WUNLOCK(inp);
4418 	SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4419 	return (stcb);
4420 }
4421 
4422 
4423 void
4424 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4425 {
4426 	struct sctp_association *asoc;
4427 
4428 	asoc = &stcb->asoc;
4429 	asoc->numnets--;
4430 	TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4431 	if (net == asoc->primary_destination) {
4432 		/* Reset primary */
4433 		struct sctp_nets *lnet;
4434 
4435 		lnet = TAILQ_FIRST(&asoc->nets);
4436 		/*
4437 		 * Mobility adaptation Ideally, if deleted destination is
4438 		 * the primary, it becomes a fast retransmission trigger by
4439 		 * the subsequent SET PRIMARY. (by micchie)
4440 		 */
4441 		if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4442 		    SCTP_MOBILITY_BASE) ||
4443 		    sctp_is_mobility_feature_on(stcb->sctp_ep,
4444 		    SCTP_MOBILITY_FASTHANDOFF)) {
4445 			SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4446 			if (asoc->deleted_primary != NULL) {
4447 				SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4448 				goto out;
4449 			}
4450 			asoc->deleted_primary = net;
4451 			atomic_add_int(&net->ref_count, 1);
4452 			memset(&net->lastsa, 0, sizeof(net->lastsa));
4453 			memset(&net->lastsv, 0, sizeof(net->lastsv));
4454 			sctp_mobility_feature_on(stcb->sctp_ep,
4455 			    SCTP_MOBILITY_PRIM_DELETED);
4456 			sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4457 			    stcb->sctp_ep, stcb, NULL);
4458 		}
4459 out:
4460 		/* Try to find a confirmed primary */
4461 		asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4462 	}
4463 	if (net == asoc->last_data_chunk_from) {
4464 		/* Reset primary */
4465 		asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4466 	}
4467 	if (net == asoc->last_control_chunk_from) {
4468 		/* Clear net */
4469 		asoc->last_control_chunk_from = NULL;
4470 	}
4471 	if (net == stcb->asoc.alternate) {
4472 		sctp_free_remote_addr(stcb->asoc.alternate);
4473 		stcb->asoc.alternate = NULL;
4474 	}
4475 	sctp_free_remote_addr(net);
4476 }
4477 
4478 /*
4479  * remove a remote endpoint address from an association, it will fail if the
4480  * address does not exist.
4481  */
4482 int
4483 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4484 {
4485 	/*
4486 	 * Here we need to remove a remote address. This is quite simple, we
4487 	 * first find it in the list of address for the association
4488 	 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4489 	 * on that item. Note we do not allow it to be removed if there are
4490 	 * no other addresses.
4491 	 */
4492 	struct sctp_association *asoc;
4493 	struct sctp_nets *net, *nnet;
4494 
4495 	asoc = &stcb->asoc;
4496 
4497 	/* locate the address */
4498 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4499 		if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4500 			continue;
4501 		}
4502 		if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4503 		    remaddr)) {
4504 			/* we found the guy */
4505 			if (asoc->numnets < 2) {
4506 				/* Must have at LEAST two remote addresses */
4507 				return (-1);
4508 			} else {
4509 				sctp_remove_net(stcb, net);
4510 				return (0);
4511 			}
4512 		}
4513 	}
4514 	/* not found. */
4515 	return (-2);
4516 }
4517 
4518 void
4519 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4520 {
4521 	struct sctpvtaghead *chain;
4522 	struct sctp_tagblock *twait_block;
4523 	int found = 0;
4524 	int i;
4525 
4526 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4527 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4528 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4529 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4530 			    (twait_block->vtag_block[i].lport == lport) &&
4531 			    (twait_block->vtag_block[i].rport == rport)) {
4532 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4533 				twait_block->vtag_block[i].v_tag = 0;
4534 				twait_block->vtag_block[i].lport = 0;
4535 				twait_block->vtag_block[i].rport = 0;
4536 				found = 1;
4537 				break;
4538 			}
4539 		}
4540 		if (found)
4541 			break;
4542 	}
4543 }
4544 
4545 int
4546 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4547 {
4548 	struct sctpvtaghead *chain;
4549 	struct sctp_tagblock *twait_block;
4550 	int found = 0;
4551 	int i;
4552 
4553 	SCTP_INP_INFO_WLOCK();
4554 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4555 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4556 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4557 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4558 			    (twait_block->vtag_block[i].lport == lport) &&
4559 			    (twait_block->vtag_block[i].rport == rport)) {
4560 				found = 1;
4561 				break;
4562 			}
4563 		}
4564 		if (found)
4565 			break;
4566 	}
4567 	SCTP_INP_INFO_WUNLOCK();
4568 	return (found);
4569 }
4570 
4571 
4572 void
4573 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4574 {
4575 	struct sctpvtaghead *chain;
4576 	struct sctp_tagblock *twait_block;
4577 	struct timeval now;
4578 	int set, i;
4579 
4580 	if (time == 0) {
4581 		/* Its disabled */
4582 		return;
4583 	}
4584 	(void)SCTP_GETTIME_TIMEVAL(&now);
4585 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4586 	set = 0;
4587 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4588 		/* Block(s) present, lets find space, and expire on the fly */
4589 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4590 			if ((twait_block->vtag_block[i].v_tag == 0) &&
4591 			    !set) {
4592 				twait_block->vtag_block[i].tv_sec_at_expire =
4593 				    now.tv_sec + time;
4594 				twait_block->vtag_block[i].v_tag = tag;
4595 				twait_block->vtag_block[i].lport = lport;
4596 				twait_block->vtag_block[i].rport = rport;
4597 				set = 1;
4598 			} else if ((twait_block->vtag_block[i].v_tag) &&
4599 			    ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4600 				/* Audit expires this guy */
4601 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4602 				twait_block->vtag_block[i].v_tag = 0;
4603 				twait_block->vtag_block[i].lport = 0;
4604 				twait_block->vtag_block[i].rport = 0;
4605 				if (set == 0) {
4606 					/* Reuse it for my new tag */
4607 					twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4608 					twait_block->vtag_block[i].v_tag = tag;
4609 					twait_block->vtag_block[i].lport = lport;
4610 					twait_block->vtag_block[i].rport = rport;
4611 					set = 1;
4612 				}
4613 			}
4614 		}
4615 		if (set) {
4616 			/*
4617 			 * We only do up to the block where we can place our
4618 			 * tag for audits
4619 			 */
4620 			break;
4621 		}
4622 	}
4623 	/* Need to add a new block to chain */
4624 	if (!set) {
4625 		SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4626 		    sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4627 		if (twait_block == NULL) {
4628 #ifdef INVARIANTS
4629 			panic("Can not alloc tagblock");
4630 #endif
4631 			return;
4632 		}
4633 		memset(twait_block, 0, sizeof(struct sctp_tagblock));
4634 		LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4635 		twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4636 		twait_block->vtag_block[0].v_tag = tag;
4637 		twait_block->vtag_block[0].lport = lport;
4638 		twait_block->vtag_block[0].rport = rport;
4639 	}
4640 }
4641 
4642 void
4643 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4644 {
4645 	struct sctp_tmit_chunk *chk, *nchk;
4646 	struct sctp_queued_to_read *ctl, *nctl;
4647 
4648 	TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
4649 		TAILQ_REMOVE(rh, ctl, next_instrm);
4650 		ctl->on_strm_q = 0;
4651 		if (ctl->on_read_q == 0) {
4652 			sctp_free_remote_addr(ctl->whoFrom);
4653 			if (ctl->data) {
4654 				sctp_m_freem(ctl->data);
4655 				ctl->data = NULL;
4656 			}
4657 		}
4658 		/* Reassembly free? */
4659 		TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
4660 			TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
4661 			if (chk->data) {
4662 				sctp_m_freem(chk->data);
4663 				chk->data = NULL;
4664 			}
4665 			if (chk->holds_key_ref)
4666 				sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4667 			sctp_free_remote_addr(chk->whoTo);
4668 			SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4669 			SCTP_DECR_CHK_COUNT();
4670 			/* sa_ignore FREED_MEMORY */
4671 		}
4672 		/*
4673 		 * We don't free the address here since all the net's were
4674 		 * freed above.
4675 		 */
4676 		if (ctl->on_read_q == 0) {
4677 			sctp_free_a_readq(stcb, ctl);
4678 		}
4679 	}
4680 }
4681 
4682 
4683 /*-
4684  * Free the association after un-hashing the remote port. This
4685  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4686  * expect that the input to this function IS a locked TCB.
4687  * It will return 0, if it did NOT destroy the association (instead
4688  * it unlocks it. It will return NON-zero if it either destroyed the
4689  * association OR the association is already destroyed.
4690  */
4691 int
4692 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4693 {
4694 	int i;
4695 	struct sctp_association *asoc;
4696 	struct sctp_nets *net, *nnet;
4697 	struct sctp_laddr *laddr, *naddr;
4698 	struct sctp_tmit_chunk *chk, *nchk;
4699 	struct sctp_asconf_addr *aparam, *naparam;
4700 	struct sctp_asconf_ack *aack, *naack;
4701 	struct sctp_stream_reset_list *strrst, *nstrrst;
4702 	struct sctp_queued_to_read *sq, *nsq;
4703 	struct sctp_stream_queue_pending *sp, *nsp;
4704 	sctp_sharedkey_t *shared_key, *nshared_key;
4705 	struct socket *so;
4706 
4707 	/* first, lets purge the entry from the hash table. */
4708 
4709 #ifdef SCTP_LOG_CLOSING
4710 	sctp_log_closing(inp, stcb, 6);
4711 #endif
4712 	if (stcb->asoc.state == 0) {
4713 #ifdef SCTP_LOG_CLOSING
4714 		sctp_log_closing(inp, NULL, 7);
4715 #endif
4716 		/* there is no asoc, really TSNH :-0 */
4717 		return (1);
4718 	}
4719 	if (stcb->asoc.alternate) {
4720 		sctp_free_remote_addr(stcb->asoc.alternate);
4721 		stcb->asoc.alternate = NULL;
4722 	}
4723 	/* TEMP CODE */
4724 	if (stcb->freed_from_where == 0) {
4725 		/* Only record the first place free happened from */
4726 		stcb->freed_from_where = from_location;
4727 	}
4728 	/* TEMP CODE */
4729 
4730 	asoc = &stcb->asoc;
4731 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4732 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4733 		/* nothing around */
4734 		so = NULL;
4735 	else
4736 		so = inp->sctp_socket;
4737 
4738 	/*
4739 	 * We used timer based freeing if a reader or writer is in the way.
4740 	 * So we first check if we are actually being called from a timer,
4741 	 * if so we abort early if a reader or writer is still in the way.
4742 	 */
4743 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4744 	    (from_inpcbfree == SCTP_NORMAL_PROC)) {
4745 		/*
4746 		 * is it the timer driving us? if so are the reader/writers
4747 		 * gone?
4748 		 */
4749 		if (stcb->asoc.refcnt) {
4750 			/* nope, reader or writer in the way */
4751 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4752 			/* no asoc destroyed */
4753 			SCTP_TCB_UNLOCK(stcb);
4754 #ifdef SCTP_LOG_CLOSING
4755 			sctp_log_closing(inp, stcb, 8);
4756 #endif
4757 			return (0);
4758 		}
4759 	}
4760 	/* now clean up any other timers */
4761 	(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4762 	asoc->dack_timer.self = NULL;
4763 	(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4764 	/*-
4765 	 * For stream reset we don't blast this unless
4766 	 * it is a str-reset timer, it might be the
4767 	 * free-asoc timer which we DON'T want to
4768 	 * disturb.
4769 	 */
4770 	if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4771 		asoc->strreset_timer.self = NULL;
4772 	(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4773 	asoc->asconf_timer.self = NULL;
4774 	(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4775 	asoc->autoclose_timer.self = NULL;
4776 	(void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4777 	asoc->shut_guard_timer.self = NULL;
4778 	(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4779 	asoc->delayed_event_timer.self = NULL;
4780 	/* Mobility adaptation */
4781 	(void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4782 	asoc->delete_prim_timer.self = NULL;
4783 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4784 		(void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4785 		net->rxt_timer.self = NULL;
4786 		(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4787 		net->pmtu_timer.self = NULL;
4788 		(void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4789 		net->hb_timer.self = NULL;
4790 	}
4791 	/* Now the read queue needs to be cleaned up (only once) */
4792 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4793 		stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4794 		SCTP_INP_READ_LOCK(inp);
4795 		TAILQ_FOREACH(sq, &inp->read_queue, next) {
4796 			if (sq->stcb == stcb) {
4797 				sq->do_not_ref_stcb = 1;
4798 				sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4799 				/*
4800 				 * If there is no end, there never will be
4801 				 * now.
4802 				 */
4803 				if (sq->end_added == 0) {
4804 					/* Held for PD-API clear that. */
4805 					sq->pdapi_aborted = 1;
4806 					sq->held_length = 0;
4807 					if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4808 						/*
4809 						 * Need to add a PD-API
4810 						 * aborted indication.
4811 						 * Setting the control_pdapi
4812 						 * assures that it will be
4813 						 * added right after this
4814 						 * msg.
4815 						 */
4816 						uint32_t strseq;
4817 
4818 						stcb->asoc.control_pdapi = sq;
4819 						strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4820 						sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4821 						    stcb,
4822 						    SCTP_PARTIAL_DELIVERY_ABORTED,
4823 						    (void *)&strseq,
4824 						    SCTP_SO_LOCKED);
4825 						stcb->asoc.control_pdapi = NULL;
4826 					}
4827 				}
4828 				/* Add an end to wake them */
4829 				sq->end_added = 1;
4830 			}
4831 		}
4832 		SCTP_INP_READ_UNLOCK(inp);
4833 		if (stcb->block_entry) {
4834 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4835 			stcb->block_entry->error = ECONNRESET;
4836 			stcb->block_entry = NULL;
4837 		}
4838 	}
4839 	if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4840 		/*
4841 		 * Someone holds a reference OR the socket is unaccepted
4842 		 * yet.
4843 		 */
4844 		if ((stcb->asoc.refcnt) ||
4845 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4846 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4847 			stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4848 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4849 		}
4850 		SCTP_TCB_UNLOCK(stcb);
4851 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4852 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4853 			/* nothing around */
4854 			so = NULL;
4855 		if (so) {
4856 			/* Wake any reader/writers */
4857 			sctp_sorwakeup(inp, so);
4858 			sctp_sowwakeup(inp, so);
4859 		}
4860 #ifdef SCTP_LOG_CLOSING
4861 		sctp_log_closing(inp, stcb, 9);
4862 #endif
4863 		/* no asoc destroyed */
4864 		return (0);
4865 	}
4866 #ifdef SCTP_LOG_CLOSING
4867 	sctp_log_closing(inp, stcb, 10);
4868 #endif
4869 	/*
4870 	 * When I reach here, no others want to kill the assoc yet.. and I
4871 	 * own the lock. Now its possible an abort comes in when I do the
4872 	 * lock exchange below to grab all the locks to do the final take
4873 	 * out. to prevent this we increment the count, which will start a
4874 	 * timer and blow out above thus assuring us that we hold exclusive
4875 	 * killing of the asoc. Note that after getting back the TCB lock we
4876 	 * will go ahead and increment the counter back up and stop any
4877 	 * timer a passing stranger may have started :-S
4878 	 */
4879 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4880 		atomic_add_int(&stcb->asoc.refcnt, 1);
4881 
4882 		SCTP_TCB_UNLOCK(stcb);
4883 		SCTP_INP_INFO_WLOCK();
4884 		SCTP_INP_WLOCK(inp);
4885 		SCTP_TCB_LOCK(stcb);
4886 	}
4887 	/* Double check the GONE flag */
4888 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4889 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4890 		/* nothing around */
4891 		so = NULL;
4892 
4893 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4894 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4895 		/*
4896 		 * For TCP type we need special handling when we are
4897 		 * connected. We also include the peel'ed off ones to.
4898 		 */
4899 		if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4900 			inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4901 			inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4902 			if (so) {
4903 				SOCK_LOCK(so);
4904 				if (so->so_rcv.sb_cc == 0) {
4905 					so->so_state &= ~(SS_ISCONNECTING |
4906 					    SS_ISDISCONNECTING |
4907 					    SS_ISCONFIRMING |
4908 					    SS_ISCONNECTED);
4909 				}
4910 				socantrcvmore_locked(so);
4911 				sctp_sowwakeup(inp, so);
4912 				sctp_sorwakeup(inp, so);
4913 				SCTP_SOWAKEUP(so);
4914 			}
4915 		}
4916 	}
4917 	/*
4918 	 * Make it invalid too, that way if its about to run it will abort
4919 	 * and return.
4920 	 */
4921 	/* re-increment the lock */
4922 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4923 		atomic_add_int(&stcb->asoc.refcnt, -1);
4924 	}
4925 	if (stcb->asoc.refcnt) {
4926 		stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4927 		sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4928 		if (from_inpcbfree == SCTP_NORMAL_PROC) {
4929 			SCTP_INP_INFO_WUNLOCK();
4930 			SCTP_INP_WUNLOCK(inp);
4931 		}
4932 		SCTP_TCB_UNLOCK(stcb);
4933 		return (0);
4934 	}
4935 	asoc->state = 0;
4936 	if (inp->sctp_tcbhash) {
4937 		LIST_REMOVE(stcb, sctp_tcbhash);
4938 	}
4939 	if (stcb->asoc.in_asocid_hash) {
4940 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4941 	}
4942 	/* Now lets remove it from the list of ALL associations in the EP */
4943 	LIST_REMOVE(stcb, sctp_tcblist);
4944 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4945 		SCTP_INP_INCR_REF(inp);
4946 		SCTP_INP_WUNLOCK(inp);
4947 	}
4948 	/* pull from vtag hash */
4949 	LIST_REMOVE(stcb, sctp_asocs);
4950 	sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4951 	    inp->sctp_lport, stcb->rport);
4952 
4953 	/*
4954 	 * Now restop the timers to be sure this is paranoia at is finest!
4955 	 */
4956 	(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4957 	(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4958 	(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4959 	(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4960 	(void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4961 	(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4962 	(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4963 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4964 		(void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4965 		(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4966 		(void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4967 	}
4968 
4969 	asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4970 	/*
4971 	 * The chunk lists and such SHOULD be empty but we check them just
4972 	 * in case.
4973 	 */
4974 	/* anything on the wheel needs to be removed */
4975 	for (i = 0; i < asoc->streamoutcnt; i++) {
4976 		struct sctp_stream_out *outs;
4977 
4978 		outs = &asoc->strmout[i];
4979 		/* now clean up any chunks here */
4980 		TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4981 			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4982 			TAILQ_REMOVE(&outs->outqueue, sp, next);
4983 			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
4984 			sctp_free_spbufspace(stcb, asoc, sp);
4985 			if (sp->data) {
4986 				if (so) {
4987 					/* Still an open socket - report */
4988 					sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4989 					    0, (void *)sp, SCTP_SO_LOCKED);
4990 				}
4991 				if (sp->data) {
4992 					sctp_m_freem(sp->data);
4993 					sp->data = NULL;
4994 					sp->tail_mbuf = NULL;
4995 					sp->length = 0;
4996 				}
4997 			}
4998 			if (sp->net) {
4999 				sctp_free_remote_addr(sp->net);
5000 				sp->net = NULL;
5001 			}
5002 			sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5003 		}
5004 	}
5005 	/* sa_ignore FREED_MEMORY */
5006 	TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5007 		TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5008 		SCTP_FREE(strrst, SCTP_M_STRESET);
5009 	}
5010 	TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5011 		TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5012 		if (sq->data) {
5013 			sctp_m_freem(sq->data);
5014 			sq->data = NULL;
5015 		}
5016 		sctp_free_remote_addr(sq->whoFrom);
5017 		sq->whoFrom = NULL;
5018 		sq->stcb = NULL;
5019 		/* Free the ctl entry */
5020 		sctp_free_a_readq(stcb, sq);
5021 		/* sa_ignore FREED_MEMORY */
5022 	}
5023 	TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5024 		TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5025 		if (chk->data) {
5026 			sctp_m_freem(chk->data);
5027 			chk->data = NULL;
5028 		}
5029 		if (chk->holds_key_ref)
5030 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5031 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5032 		SCTP_DECR_CHK_COUNT();
5033 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5034 		asoc->free_chunk_cnt--;
5035 		/* sa_ignore FREED_MEMORY */
5036 	}
5037 	/* pending send queue SHOULD be empty */
5038 	TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5039 		if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5040 			asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5041 #ifdef INVARIANTS
5042 		} else {
5043 			panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5044 #endif
5045 		}
5046 		TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5047 		if (chk->data) {
5048 			if (so) {
5049 				/* Still a socket? */
5050 				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5051 				    0, chk, SCTP_SO_LOCKED);
5052 			}
5053 			if (chk->data) {
5054 				sctp_m_freem(chk->data);
5055 				chk->data = NULL;
5056 			}
5057 		}
5058 		if (chk->holds_key_ref)
5059 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5060 		if (chk->whoTo) {
5061 			sctp_free_remote_addr(chk->whoTo);
5062 			chk->whoTo = NULL;
5063 		}
5064 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5065 		SCTP_DECR_CHK_COUNT();
5066 		/* sa_ignore FREED_MEMORY */
5067 	}
5068 	/* sent queue SHOULD be empty */
5069 	TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5070 		if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5071 			if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5072 				asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5073 #ifdef INVARIANTS
5074 			} else {
5075 				panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5076 #endif
5077 			}
5078 		}
5079 		TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5080 		if (chk->data) {
5081 			if (so) {
5082 				/* Still a socket? */
5083 				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5084 				    0, chk, SCTP_SO_LOCKED);
5085 			}
5086 			if (chk->data) {
5087 				sctp_m_freem(chk->data);
5088 				chk->data = NULL;
5089 			}
5090 		}
5091 		if (chk->holds_key_ref)
5092 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5093 		sctp_free_remote_addr(chk->whoTo);
5094 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5095 		SCTP_DECR_CHK_COUNT();
5096 		/* sa_ignore FREED_MEMORY */
5097 	}
5098 #ifdef INVARIANTS
5099 	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5100 		if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5101 			panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5102 		}
5103 	}
5104 #endif
5105 	/* control queue MAY not be empty */
5106 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5107 		TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5108 		if (chk->data) {
5109 			sctp_m_freem(chk->data);
5110 			chk->data = NULL;
5111 		}
5112 		if (chk->holds_key_ref)
5113 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5114 		sctp_free_remote_addr(chk->whoTo);
5115 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5116 		SCTP_DECR_CHK_COUNT();
5117 		/* sa_ignore FREED_MEMORY */
5118 	}
5119 	/* ASCONF queue MAY not be empty */
5120 	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5121 		TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5122 		if (chk->data) {
5123 			sctp_m_freem(chk->data);
5124 			chk->data = NULL;
5125 		}
5126 		if (chk->holds_key_ref)
5127 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5128 		sctp_free_remote_addr(chk->whoTo);
5129 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5130 		SCTP_DECR_CHK_COUNT();
5131 		/* sa_ignore FREED_MEMORY */
5132 	}
5133 	if (asoc->mapping_array) {
5134 		SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5135 		asoc->mapping_array = NULL;
5136 	}
5137 	if (asoc->nr_mapping_array) {
5138 		SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5139 		asoc->nr_mapping_array = NULL;
5140 	}
5141 	/* the stream outs */
5142 	if (asoc->strmout) {
5143 		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5144 		asoc->strmout = NULL;
5145 	}
5146 	asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5147 	if (asoc->strmin) {
5148 		for (i = 0; i < asoc->streamincnt; i++) {
5149 			sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5150 			sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5151 		}
5152 		SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5153 		asoc->strmin = NULL;
5154 	}
5155 	asoc->streamincnt = 0;
5156 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5157 #ifdef INVARIANTS
5158 		if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5159 			panic("no net's left alloc'ed, or list points to itself");
5160 		}
5161 #endif
5162 		TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5163 		sctp_free_remote_addr(net);
5164 	}
5165 	LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5166 		/* sa_ignore FREED_MEMORY */
5167 		sctp_remove_laddr(laddr);
5168 	}
5169 
5170 	/* pending asconf (address) parameters */
5171 	TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5172 		/* sa_ignore FREED_MEMORY */
5173 		TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5174 		SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5175 	}
5176 	TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5177 		/* sa_ignore FREED_MEMORY */
5178 		TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5179 		if (aack->data != NULL) {
5180 			sctp_m_freem(aack->data);
5181 		}
5182 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5183 	}
5184 	/* clean up auth stuff */
5185 	if (asoc->local_hmacs)
5186 		sctp_free_hmaclist(asoc->local_hmacs);
5187 	if (asoc->peer_hmacs)
5188 		sctp_free_hmaclist(asoc->peer_hmacs);
5189 
5190 	if (asoc->local_auth_chunks)
5191 		sctp_free_chunklist(asoc->local_auth_chunks);
5192 	if (asoc->peer_auth_chunks)
5193 		sctp_free_chunklist(asoc->peer_auth_chunks);
5194 
5195 	sctp_free_authinfo(&asoc->authinfo);
5196 
5197 	LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5198 		LIST_REMOVE(shared_key, next);
5199 		sctp_free_sharedkey(shared_key);
5200 		/* sa_ignore FREED_MEMORY */
5201 	}
5202 
5203 	/* Insert new items here :> */
5204 
5205 	/* Get rid of LOCK */
5206 	SCTP_TCB_UNLOCK(stcb);
5207 	SCTP_TCB_LOCK_DESTROY(stcb);
5208 	SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5209 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5210 		SCTP_INP_INFO_WUNLOCK();
5211 		SCTP_INP_RLOCK(inp);
5212 	}
5213 #ifdef SCTP_TRACK_FREED_ASOCS
5214 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5215 		/* now clean up the tasoc itself */
5216 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5217 		SCTP_DECR_ASOC_COUNT();
5218 	} else {
5219 		LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5220 	}
5221 #else
5222 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5223 	SCTP_DECR_ASOC_COUNT();
5224 #endif
5225 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5226 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5227 			/*
5228 			 * If its NOT the inp_free calling us AND sctp_close
5229 			 * as been called, we call back...
5230 			 */
5231 			SCTP_INP_RUNLOCK(inp);
5232 			/*
5233 			 * This will start the kill timer (if we are the
5234 			 * last one) since we hold an increment yet. But
5235 			 * this is the only safe way to do this since
5236 			 * otherwise if the socket closes at the same time
5237 			 * we are here we might collide in the cleanup.
5238 			 */
5239 			sctp_inpcb_free(inp,
5240 			    SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5241 			    SCTP_CALLED_DIRECTLY_NOCMPSET);
5242 			SCTP_INP_DECR_REF(inp);
5243 			goto out_of;
5244 		} else {
5245 			/* The socket is still open. */
5246 			SCTP_INP_DECR_REF(inp);
5247 		}
5248 	}
5249 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5250 		SCTP_INP_RUNLOCK(inp);
5251 	}
5252 out_of:
5253 	/* destroyed the asoc */
5254 #ifdef SCTP_LOG_CLOSING
5255 	sctp_log_closing(inp, NULL, 11);
5256 #endif
5257 	return (1);
5258 }
5259 
5260 
5261 
5262 /*
5263  * determine if a destination is "reachable" based upon the addresses bound
5264  * to the current endpoint (e.g. only v4 or v6 currently bound)
5265  */
5266 /*
5267  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5268  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5269  * types bound as its endpoint
5270  */
5271 int
5272 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5273 {
5274 	struct sctp_inpcb *inp;
5275 	int answer;
5276 
5277 	/*
5278 	 * No locks here, the TCB, in all cases is already locked and an
5279 	 * assoc is up. There is either a INP lock by the caller applied (in
5280 	 * asconf case when deleting an address) or NOT in the HB case,
5281 	 * however if HB then the INP increment is up and the INP will not
5282 	 * be removed (on top of the fact that we have a TCB lock). So we
5283 	 * only want to read the sctp_flags, which is either bound-all or
5284 	 * not.. no protection needed since once an assoc is up you can't be
5285 	 * changing your binding.
5286 	 */
5287 	inp = stcb->sctp_ep;
5288 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5289 		/* if bound all, destination is not restricted */
5290 		/*
5291 		 * RRS: Question during lock work: Is this correct? If you
5292 		 * are bound-all you still might need to obey the V4--V6
5293 		 * flags??? IMO this bound-all stuff needs to be removed!
5294 		 */
5295 		return (1);
5296 	}
5297 	/* NOTE: all "scope" checks are done when local addresses are added */
5298 	switch (destaddr->sa_family) {
5299 #ifdef INET6
5300 	case AF_INET6:
5301 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5302 		break;
5303 #endif
5304 #ifdef INET
5305 	case AF_INET:
5306 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5307 		break;
5308 #endif
5309 	default:
5310 		/* invalid family, so it's unreachable */
5311 		answer = 0;
5312 		break;
5313 	}
5314 	return (answer);
5315 }
5316 
5317 /*
5318  * update the inp_vflags on an endpoint
5319  */
5320 static void
5321 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5322 {
5323 	struct sctp_laddr *laddr;
5324 
5325 	/* first clear the flag */
5326 	inp->ip_inp.inp.inp_vflag = 0;
5327 	/* set the flag based on addresses on the ep list */
5328 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5329 		if (laddr->ifa == NULL) {
5330 			SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5331 			    __func__);
5332 			continue;
5333 		}
5334 		if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5335 			continue;
5336 		}
5337 		switch (laddr->ifa->address.sa.sa_family) {
5338 #ifdef INET6
5339 		case AF_INET6:
5340 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5341 			break;
5342 #endif
5343 #ifdef INET
5344 		case AF_INET:
5345 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5346 			break;
5347 #endif
5348 		default:
5349 			break;
5350 		}
5351 	}
5352 }
5353 
5354 /*
5355  * Add the address to the endpoint local address list There is nothing to be
5356  * done if we are bound to all addresses
5357  */
5358 void
5359 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5360 {
5361 	struct sctp_laddr *laddr;
5362 	struct sctp_tcb *stcb;
5363 	int fnd, error = 0;
5364 
5365 	fnd = 0;
5366 
5367 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5368 		/* You are already bound to all. You have it already */
5369 		return;
5370 	}
5371 #ifdef INET6
5372 	if (ifa->address.sa.sa_family == AF_INET6) {
5373 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5374 			/* Can't bind a non-useable addr. */
5375 			return;
5376 		}
5377 	}
5378 #endif
5379 	/* first, is it already present? */
5380 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5381 		if (laddr->ifa == ifa) {
5382 			fnd = 1;
5383 			break;
5384 		}
5385 	}
5386 
5387 	if (fnd == 0) {
5388 		/* Not in the ep list */
5389 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5390 		if (error != 0)
5391 			return;
5392 		inp->laddr_count++;
5393 		/* update inp_vflag flags */
5394 		switch (ifa->address.sa.sa_family) {
5395 #ifdef INET6
5396 		case AF_INET6:
5397 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5398 			break;
5399 #endif
5400 #ifdef INET
5401 		case AF_INET:
5402 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5403 			break;
5404 #endif
5405 		default:
5406 			break;
5407 		}
5408 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5409 			sctp_add_local_addr_restricted(stcb, ifa);
5410 		}
5411 	}
5412 	return;
5413 }
5414 
5415 
5416 /*
5417  * select a new (hopefully reachable) destination net (should only be used
5418  * when we deleted an ep addr that is the only usable source address to reach
5419  * the destination net)
5420  */
5421 static void
5422 sctp_select_primary_destination(struct sctp_tcb *stcb)
5423 {
5424 	struct sctp_nets *net;
5425 
5426 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5427 		/* for now, we'll just pick the first reachable one we find */
5428 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5429 			continue;
5430 		if (sctp_destination_is_reachable(stcb,
5431 		    (struct sockaddr *)&net->ro._l_addr)) {
5432 			/* found a reachable destination */
5433 			stcb->asoc.primary_destination = net;
5434 		}
5435 	}
5436 	/* I can't there from here! ...we're gonna die shortly... */
5437 }
5438 
5439 
5440 /*
5441  * Delete the address from the endpoint local address list. There is nothing
5442  * to be done if we are bound to all addresses
5443  */
5444 void
5445 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5446 {
5447 	struct sctp_laddr *laddr;
5448 	int fnd;
5449 
5450 	fnd = 0;
5451 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5452 		/* You are already bound to all. You have it already */
5453 		return;
5454 	}
5455 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5456 		if (laddr->ifa == ifa) {
5457 			fnd = 1;
5458 			break;
5459 		}
5460 	}
5461 	if (fnd && (inp->laddr_count < 2)) {
5462 		/* can't delete unless there are at LEAST 2 addresses */
5463 		return;
5464 	}
5465 	if (fnd) {
5466 		/*
5467 		 * clean up any use of this address go through our
5468 		 * associations and clear any last_used_address that match
5469 		 * this one for each assoc, see if a new primary_destination
5470 		 * is needed
5471 		 */
5472 		struct sctp_tcb *stcb;
5473 
5474 		/* clean up "next_addr_touse" */
5475 		if (inp->next_addr_touse == laddr)
5476 			/* delete this address */
5477 			inp->next_addr_touse = NULL;
5478 
5479 		/* clean up "last_used_address" */
5480 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5481 			struct sctp_nets *net;
5482 
5483 			SCTP_TCB_LOCK(stcb);
5484 			if (stcb->asoc.last_used_address == laddr)
5485 				/* delete this address */
5486 				stcb->asoc.last_used_address = NULL;
5487 			/*
5488 			 * Now spin through all the nets and purge any ref
5489 			 * to laddr
5490 			 */
5491 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5492 				if (net->ro._s_addr == laddr->ifa) {
5493 					/* Yep, purge src address selected */
5494 					sctp_rtentry_t *rt;
5495 
5496 					/* delete this address if cached */
5497 					rt = net->ro.ro_rt;
5498 					if (rt != NULL) {
5499 						RTFREE(rt);
5500 						net->ro.ro_rt = NULL;
5501 					}
5502 					sctp_free_ifa(net->ro._s_addr);
5503 					net->ro._s_addr = NULL;
5504 					net->src_addr_selected = 0;
5505 				}
5506 			}
5507 			SCTP_TCB_UNLOCK(stcb);
5508 		}		/* for each tcb */
5509 		/* remove it from the ep list */
5510 		sctp_remove_laddr(laddr);
5511 		inp->laddr_count--;
5512 		/* update inp_vflag flags */
5513 		sctp_update_ep_vflag(inp);
5514 	}
5515 	return;
5516 }
5517 
5518 /*
5519  * Add the address to the TCB local address restricted list.
5520  * This is a "pending" address list (eg. addresses waiting for an
5521  * ASCONF-ACK response) and cannot be used as a valid source address.
5522  */
5523 void
5524 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5525 {
5526 	struct sctp_laddr *laddr;
5527 	struct sctpladdr *list;
5528 
5529 	/*
5530 	 * Assumes TCB is locked.. and possibly the INP. May need to
5531 	 * confirm/fix that if we need it and is not the case.
5532 	 */
5533 	list = &stcb->asoc.sctp_restricted_addrs;
5534 
5535 #ifdef INET6
5536 	if (ifa->address.sa.sa_family == AF_INET6) {
5537 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5538 			/* Can't bind a non-existent addr. */
5539 			return;
5540 		}
5541 	}
5542 #endif
5543 	/* does the address already exist? */
5544 	LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5545 		if (laddr->ifa == ifa) {
5546 			return;
5547 		}
5548 	}
5549 
5550 	/* add to the list */
5551 	(void)sctp_insert_laddr(list, ifa, 0);
5552 	return;
5553 }
5554 
5555 /*
5556  * Remove a local address from the TCB local address restricted list
5557  */
5558 void
5559 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5560 {
5561 	struct sctp_inpcb *inp;
5562 	struct sctp_laddr *laddr;
5563 
5564 	/*
5565 	 * This is called by asconf work. It is assumed that a) The TCB is
5566 	 * locked and b) The INP is locked. This is true in as much as I can
5567 	 * trace through the entry asconf code where I did these locks.
5568 	 * Again, the ASCONF code is a bit different in that it does lock
5569 	 * the INP during its work often times. This must be since we don't
5570 	 * want other proc's looking up things while what they are looking
5571 	 * up is changing :-D
5572 	 */
5573 
5574 	inp = stcb->sctp_ep;
5575 	/* if subset bound and don't allow ASCONF's, can't delete last */
5576 	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5577 	    sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5578 		if (stcb->sctp_ep->laddr_count < 2) {
5579 			/* can't delete last address */
5580 			return;
5581 		}
5582 	}
5583 	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5584 		/* remove the address if it exists */
5585 		if (laddr->ifa == NULL)
5586 			continue;
5587 		if (laddr->ifa == ifa) {
5588 			sctp_remove_laddr(laddr);
5589 			return;
5590 		}
5591 	}
5592 
5593 	/* address not found! */
5594 	return;
5595 }
5596 
5597 /*
5598  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5599  */
5600 /* sysctl */
5601 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5602 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5603 
5604 
5605 
5606 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5607 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5608 int *sctp_cpuarry = NULL;
5609 void
5610 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5611 {
5612 	/* Queue a packet to a processor for the specified core */
5613 	struct sctp_mcore_queue *qent;
5614 	struct sctp_mcore_ctrl *wkq;
5615 	int need_wake = 0;
5616 
5617 	if (sctp_mcore_workers == NULL) {
5618 		/* Something went way bad during setup */
5619 		sctp_input_with_port(m, off, 0);
5620 		return;
5621 	}
5622 	SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5623 	    (sizeof(struct sctp_mcore_queue)),
5624 	    SCTP_M_MCORE);
5625 	if (qent == NULL) {
5626 		/* This is trouble  */
5627 		sctp_input_with_port(m, off, 0);
5628 		return;
5629 	}
5630 	qent->vn = curvnet;
5631 	qent->m = m;
5632 	qent->off = off;
5633 	qent->v6 = 0;
5634 	wkq = &sctp_mcore_workers[cpu_to_use];
5635 	SCTP_MCORE_QLOCK(wkq);
5636 
5637 	TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5638 	if (wkq->running == 0) {
5639 		need_wake = 1;
5640 	}
5641 	SCTP_MCORE_QUNLOCK(wkq);
5642 	if (need_wake) {
5643 		wakeup(&wkq->running);
5644 	}
5645 }
5646 
5647 static void
5648 sctp_mcore_thread(void *arg)
5649 {
5650 
5651 	struct sctp_mcore_ctrl *wkq;
5652 	struct sctp_mcore_queue *qent;
5653 
5654 	wkq = (struct sctp_mcore_ctrl *)arg;
5655 	struct mbuf *m;
5656 	int off, v6;
5657 
5658 	/* Wait for first tickle */
5659 	SCTP_MCORE_LOCK(wkq);
5660 	wkq->running = 0;
5661 	msleep(&wkq->running,
5662 	    &wkq->core_mtx,
5663 	    0, "wait for pkt", 0);
5664 	SCTP_MCORE_UNLOCK(wkq);
5665 
5666 	/* Bind to our cpu */
5667 	thread_lock(curthread);
5668 	sched_bind(curthread, wkq->cpuid);
5669 	thread_unlock(curthread);
5670 
5671 	/* Now lets start working */
5672 	SCTP_MCORE_LOCK(wkq);
5673 	/* Now grab lock and go */
5674 	for (;;) {
5675 		SCTP_MCORE_QLOCK(wkq);
5676 skip_sleep:
5677 		wkq->running = 1;
5678 		qent = TAILQ_FIRST(&wkq->que);
5679 		if (qent) {
5680 			TAILQ_REMOVE(&wkq->que, qent, next);
5681 			SCTP_MCORE_QUNLOCK(wkq);
5682 			CURVNET_SET(qent->vn);
5683 			m = qent->m;
5684 			off = qent->off;
5685 			v6 = qent->v6;
5686 			SCTP_FREE(qent, SCTP_M_MCORE);
5687 			if (v6 == 0) {
5688 				sctp_input_with_port(m, off, 0);
5689 			} else {
5690 				SCTP_PRINTF("V6 not yet supported\n");
5691 				sctp_m_freem(m);
5692 			}
5693 			CURVNET_RESTORE();
5694 			SCTP_MCORE_QLOCK(wkq);
5695 		}
5696 		wkq->running = 0;
5697 		if (!TAILQ_EMPTY(&wkq->que)) {
5698 			goto skip_sleep;
5699 		}
5700 		SCTP_MCORE_QUNLOCK(wkq);
5701 		msleep(&wkq->running,
5702 		    &wkq->core_mtx,
5703 		    0, "wait for pkt", 0);
5704 	}
5705 }
5706 
5707 static void
5708 sctp_startup_mcore_threads(void)
5709 {
5710 	int i, cpu;
5711 
5712 	if (mp_ncpus == 1)
5713 		return;
5714 
5715 	if (sctp_mcore_workers != NULL) {
5716 		/*
5717 		 * Already been here in some previous vnet?
5718 		 */
5719 		return;
5720 	}
5721 	SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5722 	    ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5723 	    SCTP_M_MCORE);
5724 	if (sctp_mcore_workers == NULL) {
5725 		/* TSNH I hope */
5726 		return;
5727 	}
5728 	memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5729 	    sizeof(struct sctp_mcore_ctrl)));
5730 	/* Init the structures */
5731 	for (i = 0; i <= mp_maxid; i++) {
5732 		TAILQ_INIT(&sctp_mcore_workers[i].que);
5733 		SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5734 		SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5735 		sctp_mcore_workers[i].cpuid = i;
5736 	}
5737 	if (sctp_cpuarry == NULL) {
5738 		SCTP_MALLOC(sctp_cpuarry, int *,
5739 		    (mp_ncpus * sizeof(int)),
5740 		    SCTP_M_MCORE);
5741 		i = 0;
5742 		CPU_FOREACH(cpu) {
5743 			sctp_cpuarry[i] = cpu;
5744 			i++;
5745 		}
5746 	}
5747 	/* Now start them all */
5748 	CPU_FOREACH(cpu) {
5749 		(void)kproc_create(sctp_mcore_thread,
5750 		    (void *)&sctp_mcore_workers[cpu],
5751 		    &sctp_mcore_workers[cpu].thread_proc,
5752 		    RFPROC,
5753 		    SCTP_KTHREAD_PAGES,
5754 		    SCTP_MCORE_NAME);
5755 
5756 	}
5757 }
5758 
5759 #endif
5760 
5761 void
5762 sctp_pcb_init()
5763 {
5764 	/*
5765 	 * SCTP initialization for the PCB structures should be called by
5766 	 * the sctp_init() function.
5767 	 */
5768 	int i;
5769 	struct timeval tv;
5770 
5771 	if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5772 		/* error I was called twice */
5773 		return;
5774 	}
5775 	SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5776 
5777 #if defined(SCTP_LOCAL_TRACE_BUF)
5778 	bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5779 #endif
5780 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5781 	SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5782 	    ((mp_maxid + 1) * sizeof(struct sctpstat)),
5783 	    SCTP_M_MCORE);
5784 #endif
5785 	(void)SCTP_GETTIME_TIMEVAL(&tv);
5786 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5787 	bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5788 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5789 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5790 #else
5791 	bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5792 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5793 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5794 #endif
5795 	/* init the empty list of (All) Endpoints */
5796 	LIST_INIT(&SCTP_BASE_INFO(listhead));
5797 
5798 
5799 	/* init the hash table of endpoints */
5800 	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5801 	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5802 	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5803 	SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5804 	    &SCTP_BASE_INFO(hashasocmark));
5805 	SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5806 	    &SCTP_BASE_INFO(hashmark));
5807 	SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5808 	    &SCTP_BASE_INFO(hashtcpmark));
5809 	SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5810 
5811 
5812 	SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5813 	    &SCTP_BASE_INFO(hashvrfmark));
5814 
5815 	SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5816 	    &SCTP_BASE_INFO(vrf_ifn_hashmark));
5817 	/* init the zones */
5818 	/*
5819 	 * FIX ME: Should check for NULL returns, but if it does fail we are
5820 	 * doomed to panic anyways... add later maybe.
5821 	 */
5822 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5823 	    sizeof(struct sctp_inpcb), maxsockets);
5824 
5825 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5826 	    sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5827 
5828 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5829 	    sizeof(struct sctp_laddr),
5830 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5831 
5832 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5833 	    sizeof(struct sctp_nets),
5834 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5835 
5836 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5837 	    sizeof(struct sctp_tmit_chunk),
5838 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5839 
5840 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5841 	    sizeof(struct sctp_queued_to_read),
5842 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5843 
5844 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5845 	    sizeof(struct sctp_stream_queue_pending),
5846 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5847 
5848 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5849 	    sizeof(struct sctp_asconf),
5850 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5851 
5852 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5853 	    sizeof(struct sctp_asconf_ack),
5854 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5855 
5856 
5857 	/* Master Lock INIT for info structure */
5858 	SCTP_INP_INFO_LOCK_INIT();
5859 	SCTP_STATLOG_INIT_LOCK();
5860 
5861 	SCTP_IPI_COUNT_INIT();
5862 	SCTP_IPI_ADDR_INIT();
5863 #ifdef SCTP_PACKET_LOGGING
5864 	SCTP_IP_PKTLOG_INIT();
5865 #endif
5866 	LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5867 
5868 	SCTP_WQ_ADDR_INIT();
5869 	/* not sure if we need all the counts */
5870 	SCTP_BASE_INFO(ipi_count_ep) = 0;
5871 	/* assoc/tcb zone info */
5872 	SCTP_BASE_INFO(ipi_count_asoc) = 0;
5873 	/* local addrlist zone info */
5874 	SCTP_BASE_INFO(ipi_count_laddr) = 0;
5875 	/* remote addrlist zone info */
5876 	SCTP_BASE_INFO(ipi_count_raddr) = 0;
5877 	/* chunk info */
5878 	SCTP_BASE_INFO(ipi_count_chunk) = 0;
5879 
5880 	/* socket queue zone info */
5881 	SCTP_BASE_INFO(ipi_count_readq) = 0;
5882 
5883 	/* stream out queue cont */
5884 	SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5885 
5886 	SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5887 	SCTP_BASE_INFO(ipi_free_chunks) = 0;
5888 
5889 	SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5890 
5891 	/* Init the TIMEWAIT list */
5892 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5893 		LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5894 	}
5895 	sctp_startup_iterator();
5896 
5897 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5898 	sctp_startup_mcore_threads();
5899 #endif
5900 
5901 	/*
5902 	 * INIT the default VRF which for BSD is the only one, other O/S's
5903 	 * may have more. But initially they must start with one and then
5904 	 * add the VRF's as addresses are added.
5905 	 */
5906 	sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5907 }
5908 
5909 /*
5910  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5911  */
5912 void
5913 sctp_pcb_finish(void)
5914 {
5915 	struct sctp_vrflist *vrf_bucket;
5916 	struct sctp_vrf *vrf, *nvrf;
5917 	struct sctp_ifn *ifn, *nifn;
5918 	struct sctp_ifa *ifa, *nifa;
5919 	struct sctpvtaghead *chain;
5920 	struct sctp_tagblock *twait_block, *prev_twait_block;
5921 	struct sctp_laddr *wi, *nwi;
5922 	int i;
5923 	struct sctp_iterator *it, *nit;
5924 
5925 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5926 		SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5927 		return;
5928 	}
5929 	SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5930 	/*
5931 	 * In FreeBSD the iterator thread never exits but we do clean up.
5932 	 * The only way FreeBSD reaches here is if we have VRF's but we
5933 	 * still add the ifdef to make it compile on old versions.
5934 	 */
5935 retry:
5936 	SCTP_IPI_ITERATOR_WQ_LOCK();
5937 	/*
5938 	 * sctp_iterator_worker() might be working on an it entry without
5939 	 * holding the lock.  We won't find it on the list either and
5940 	 * continue and free/destroy it.  While holding the lock, spin, to
5941 	 * avoid the race condition as sctp_iterator_worker() will have to
5942 	 * wait to re-aquire the lock.
5943 	 */
5944 	if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5945 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
5946 		SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5947 		    "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5948 		DELAY(10);
5949 		goto retry;
5950 	}
5951 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5952 		if (it->vn != curvnet) {
5953 			continue;
5954 		}
5955 		TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5956 		if (it->function_atend != NULL) {
5957 			(*it->function_atend) (it->pointer, it->val);
5958 		}
5959 		SCTP_FREE(it, SCTP_M_ITER);
5960 	}
5961 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
5962 	SCTP_ITERATOR_LOCK();
5963 	if ((sctp_it_ctl.cur_it) &&
5964 	    (sctp_it_ctl.cur_it->vn == curvnet)) {
5965 		sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5966 	}
5967 	SCTP_ITERATOR_UNLOCK();
5968 	SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5969 	SCTP_WQ_ADDR_LOCK();
5970 	LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5971 		LIST_REMOVE(wi, sctp_nxt_addr);
5972 		SCTP_DECR_LADDR_COUNT();
5973 		if (wi->action == SCTP_DEL_IP_ADDRESS) {
5974 			SCTP_FREE(wi->ifa, SCTP_M_IFA);
5975 		}
5976 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5977 	}
5978 	SCTP_WQ_ADDR_UNLOCK();
5979 
5980 	/*
5981 	 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5982 	 * destroyed first).
5983 	 */
5984 	vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5985 	LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5986 		LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5987 			LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5988 				/* free the ifa */
5989 				LIST_REMOVE(ifa, next_bucket);
5990 				LIST_REMOVE(ifa, next_ifa);
5991 				SCTP_FREE(ifa, SCTP_M_IFA);
5992 			}
5993 			/* free the ifn */
5994 			LIST_REMOVE(ifn, next_bucket);
5995 			LIST_REMOVE(ifn, next_ifn);
5996 			SCTP_FREE(ifn, SCTP_M_IFN);
5997 		}
5998 		SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5999 		/* free the vrf */
6000 		LIST_REMOVE(vrf, next_vrf);
6001 		SCTP_FREE(vrf, SCTP_M_VRF);
6002 	}
6003 	/* free the vrf hashes */
6004 	SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6005 	SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6006 
6007 	/*
6008 	 * free the TIMEWAIT list elements malloc'd in the function
6009 	 * sctp_add_vtag_to_timewait()...
6010 	 */
6011 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6012 		chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6013 		if (!LIST_EMPTY(chain)) {
6014 			prev_twait_block = NULL;
6015 			LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6016 				if (prev_twait_block) {
6017 					SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6018 				}
6019 				prev_twait_block = twait_block;
6020 			}
6021 			SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6022 		}
6023 	}
6024 
6025 	/* free the locks and mutexes */
6026 #ifdef SCTP_PACKET_LOGGING
6027 	SCTP_IP_PKTLOG_DESTROY();
6028 #endif
6029 	SCTP_IPI_ADDR_DESTROY();
6030 	SCTP_STATLOG_DESTROY();
6031 	SCTP_INP_INFO_LOCK_DESTROY();
6032 
6033 	SCTP_WQ_ADDR_DESTROY();
6034 
6035 	/* Get rid of other stuff too. */
6036 	if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6037 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6038 	if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6039 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6040 	if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6041 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6042 
6043 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6044 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6045 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6046 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6047 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6048 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6049 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6050 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6051 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6052 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6053 	SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6054 #endif
6055 }
6056 
6057 
6058 int
6059 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6060     int offset, int limit,
6061     struct sockaddr *src, struct sockaddr *dst,
6062     struct sockaddr *altsa, uint16_t port)
6063 {
6064 	/*
6065 	 * grub through the INIT pulling addresses and loading them to the
6066 	 * nets structure in the asoc. The from address in the mbuf should
6067 	 * also be loaded (if it is not already). This routine can be called
6068 	 * with either INIT or INIT-ACK's as long as the m points to the IP
6069 	 * packet and the offset points to the beginning of the parameters.
6070 	 */
6071 	struct sctp_inpcb *inp;
6072 	struct sctp_nets *net, *nnet, *net_tmp;
6073 	struct sctp_paramhdr *phdr, parm_buf;
6074 	struct sctp_tcb *stcb_tmp;
6075 	uint16_t ptype, plen;
6076 	struct sockaddr *sa;
6077 	uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6078 	struct sctp_auth_random *p_random = NULL;
6079 	uint16_t random_len = 0;
6080 	uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6081 	struct sctp_auth_hmac_algo *hmacs = NULL;
6082 	uint16_t hmacs_len = 0;
6083 	uint8_t saw_asconf = 0;
6084 	uint8_t saw_asconf_ack = 0;
6085 	uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6086 	struct sctp_auth_chunk_list *chunks = NULL;
6087 	uint16_t num_chunks = 0;
6088 	sctp_key_t *new_key;
6089 	uint32_t keylen;
6090 	int got_random = 0, got_hmacs = 0, got_chklist = 0;
6091 	uint8_t peer_supports_ecn;
6092 	uint8_t peer_supports_prsctp;
6093 	uint8_t peer_supports_auth;
6094 	uint8_t peer_supports_asconf;
6095 	uint8_t peer_supports_asconf_ack;
6096 	uint8_t peer_supports_reconfig;
6097 	uint8_t peer_supports_nrsack;
6098 	uint8_t peer_supports_pktdrop;
6099 	uint8_t peer_supports_idata;
6100 
6101 #ifdef INET
6102 	struct sockaddr_in sin;
6103 
6104 #endif
6105 #ifdef INET6
6106 	struct sockaddr_in6 sin6;
6107 
6108 #endif
6109 
6110 	/* First get the destination address setup too. */
6111 #ifdef INET
6112 	memset(&sin, 0, sizeof(sin));
6113 	sin.sin_family = AF_INET;
6114 	sin.sin_len = sizeof(sin);
6115 	sin.sin_port = stcb->rport;
6116 #endif
6117 #ifdef INET6
6118 	memset(&sin6, 0, sizeof(sin6));
6119 	sin6.sin6_family = AF_INET6;
6120 	sin6.sin6_len = sizeof(struct sockaddr_in6);
6121 	sin6.sin6_port = stcb->rport;
6122 #endif
6123 	if (altsa) {
6124 		sa = altsa;
6125 	} else {
6126 		sa = src;
6127 	}
6128 	peer_supports_idata = 0;
6129 	peer_supports_ecn = 0;
6130 	peer_supports_prsctp = 0;
6131 	peer_supports_auth = 0;
6132 	peer_supports_asconf = 0;
6133 	peer_supports_reconfig = 0;
6134 	peer_supports_nrsack = 0;
6135 	peer_supports_pktdrop = 0;
6136 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6137 		/* mark all addresses that we have currently on the list */
6138 		net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6139 	}
6140 	/* does the source address already exist? if so skip it */
6141 	inp = stcb->sctp_ep;
6142 	atomic_add_int(&stcb->asoc.refcnt, 1);
6143 	stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6144 	atomic_add_int(&stcb->asoc.refcnt, -1);
6145 
6146 	if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6147 		/* we must add the source address */
6148 		/* no scope set here since we have a tcb already. */
6149 		switch (sa->sa_family) {
6150 #ifdef INET
6151 		case AF_INET:
6152 			if (stcb->asoc.scope.ipv4_addr_legal) {
6153 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6154 					return (-1);
6155 				}
6156 			}
6157 			break;
6158 #endif
6159 #ifdef INET6
6160 		case AF_INET6:
6161 			if (stcb->asoc.scope.ipv6_addr_legal) {
6162 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6163 					return (-2);
6164 				}
6165 			}
6166 			break;
6167 #endif
6168 		default:
6169 			break;
6170 		}
6171 	} else {
6172 		if (net_tmp != NULL && stcb_tmp == stcb) {
6173 			net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6174 		} else if (stcb_tmp != stcb) {
6175 			/* It belongs to another association? */
6176 			if (stcb_tmp)
6177 				SCTP_TCB_UNLOCK(stcb_tmp);
6178 			return (-3);
6179 		}
6180 	}
6181 	if (stcb->asoc.state == 0) {
6182 		/* the assoc was freed? */
6183 		return (-4);
6184 	}
6185 	/* now we must go through each of the params. */
6186 	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6187 	while (phdr) {
6188 		ptype = ntohs(phdr->param_type);
6189 		plen = ntohs(phdr->param_length);
6190 		/*
6191 		 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6192 		 * (uint32_t)ptype, (int)plen);
6193 		 */
6194 		if (offset + plen > limit) {
6195 			break;
6196 		}
6197 		if (plen == 0) {
6198 			break;
6199 		}
6200 #ifdef INET
6201 		if (ptype == SCTP_IPV4_ADDRESS) {
6202 			if (stcb->asoc.scope.ipv4_addr_legal) {
6203 				struct sctp_ipv4addr_param *p4, p4_buf;
6204 
6205 				/* ok get the v4 address and check/add */
6206 				phdr = sctp_get_next_param(m, offset,
6207 				    (struct sctp_paramhdr *)&p4_buf,
6208 				    sizeof(p4_buf));
6209 				if (plen != sizeof(struct sctp_ipv4addr_param) ||
6210 				    phdr == NULL) {
6211 					return (-5);
6212 				}
6213 				p4 = (struct sctp_ipv4addr_param *)phdr;
6214 				sin.sin_addr.s_addr = p4->addr;
6215 				if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6216 					/* Skip multi-cast addresses */
6217 					goto next_param;
6218 				}
6219 				if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6220 				    (sin.sin_addr.s_addr == INADDR_ANY)) {
6221 					goto next_param;
6222 				}
6223 				sa = (struct sockaddr *)&sin;
6224 				inp = stcb->sctp_ep;
6225 				atomic_add_int(&stcb->asoc.refcnt, 1);
6226 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6227 				    dst, stcb);
6228 				atomic_add_int(&stcb->asoc.refcnt, -1);
6229 
6230 				if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6231 				    inp == NULL) {
6232 					/* we must add the source address */
6233 					/*
6234 					 * no scope set since we have a tcb
6235 					 * already
6236 					 */
6237 
6238 					/*
6239 					 * we must validate the state again
6240 					 * here
6241 					 */
6242 			add_it_now:
6243 					if (stcb->asoc.state == 0) {
6244 						/* the assoc was freed? */
6245 						return (-7);
6246 					}
6247 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6248 						return (-8);
6249 					}
6250 				} else if (stcb_tmp == stcb) {
6251 					if (stcb->asoc.state == 0) {
6252 						/* the assoc was freed? */
6253 						return (-10);
6254 					}
6255 					if (net != NULL) {
6256 						/* clear flag */
6257 						net->dest_state &=
6258 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6259 					}
6260 				} else {
6261 					/*
6262 					 * strange, address is in another
6263 					 * assoc? straighten out locks.
6264 					 */
6265 					if (stcb_tmp) {
6266 						if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6267 							struct mbuf *op_err;
6268 							char msg[SCTP_DIAG_INFO_LEN];
6269 
6270 							/*
6271 							 * in setup state we
6272 							 * abort this guy
6273 							 */
6274 							snprintf(msg, sizeof(msg),
6275 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6276 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6277 							    msg);
6278 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6279 							    stcb_tmp, op_err,
6280 							    SCTP_SO_NOT_LOCKED);
6281 							goto add_it_now;
6282 						}
6283 						SCTP_TCB_UNLOCK(stcb_tmp);
6284 					}
6285 					if (stcb->asoc.state == 0) {
6286 						/* the assoc was freed? */
6287 						return (-12);
6288 					}
6289 					return (-13);
6290 				}
6291 			}
6292 		} else
6293 #endif
6294 #ifdef INET6
6295 		if (ptype == SCTP_IPV6_ADDRESS) {
6296 			if (stcb->asoc.scope.ipv6_addr_legal) {
6297 				/* ok get the v6 address and check/add */
6298 				struct sctp_ipv6addr_param *p6, p6_buf;
6299 
6300 				phdr = sctp_get_next_param(m, offset,
6301 				    (struct sctp_paramhdr *)&p6_buf,
6302 				    sizeof(p6_buf));
6303 				if (plen != sizeof(struct sctp_ipv6addr_param) ||
6304 				    phdr == NULL) {
6305 					return (-14);
6306 				}
6307 				p6 = (struct sctp_ipv6addr_param *)phdr;
6308 				memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6309 				    sizeof(p6->addr));
6310 				if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6311 					/* Skip multi-cast addresses */
6312 					goto next_param;
6313 				}
6314 				if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6315 					/*
6316 					 * Link local make no sense without
6317 					 * scope
6318 					 */
6319 					goto next_param;
6320 				}
6321 				sa = (struct sockaddr *)&sin6;
6322 				inp = stcb->sctp_ep;
6323 				atomic_add_int(&stcb->asoc.refcnt, 1);
6324 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6325 				    dst, stcb);
6326 				atomic_add_int(&stcb->asoc.refcnt, -1);
6327 				if (stcb_tmp == NULL &&
6328 				    (inp == stcb->sctp_ep || inp == NULL)) {
6329 					/*
6330 					 * we must validate the state again
6331 					 * here
6332 					 */
6333 			add_it_now6:
6334 					if (stcb->asoc.state == 0) {
6335 						/* the assoc was freed? */
6336 						return (-16);
6337 					}
6338 					/*
6339 					 * we must add the address, no scope
6340 					 * set
6341 					 */
6342 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6343 						return (-17);
6344 					}
6345 				} else if (stcb_tmp == stcb) {
6346 					/*
6347 					 * we must validate the state again
6348 					 * here
6349 					 */
6350 					if (stcb->asoc.state == 0) {
6351 						/* the assoc was freed? */
6352 						return (-19);
6353 					}
6354 					if (net != NULL) {
6355 						/* clear flag */
6356 						net->dest_state &=
6357 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6358 					}
6359 				} else {
6360 					/*
6361 					 * strange, address is in another
6362 					 * assoc? straighten out locks.
6363 					 */
6364 					if (stcb_tmp) {
6365 						if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6366 							struct mbuf *op_err;
6367 							char msg[SCTP_DIAG_INFO_LEN];
6368 
6369 							/*
6370 							 * in setup state we
6371 							 * abort this guy
6372 							 */
6373 							snprintf(msg, sizeof(msg),
6374 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6375 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6376 							    msg);
6377 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6378 							    stcb_tmp, op_err,
6379 							    SCTP_SO_NOT_LOCKED);
6380 							goto add_it_now6;
6381 						}
6382 						SCTP_TCB_UNLOCK(stcb_tmp);
6383 					}
6384 					if (stcb->asoc.state == 0) {
6385 						/* the assoc was freed? */
6386 						return (-21);
6387 					}
6388 					return (-22);
6389 				}
6390 			}
6391 		} else
6392 #endif
6393 		if (ptype == SCTP_ECN_CAPABLE) {
6394 			peer_supports_ecn = 1;
6395 		} else if (ptype == SCTP_ULP_ADAPTATION) {
6396 			if (stcb->asoc.state != SCTP_STATE_OPEN) {
6397 				struct sctp_adaptation_layer_indication ai,
6398 				                                *aip;
6399 
6400 				phdr = sctp_get_next_param(m, offset,
6401 				    (struct sctp_paramhdr *)&ai, sizeof(ai));
6402 				aip = (struct sctp_adaptation_layer_indication *)phdr;
6403 				if (aip) {
6404 					stcb->asoc.peers_adaptation = ntohl(aip->indication);
6405 					stcb->asoc.adaptation_needed = 1;
6406 				}
6407 			}
6408 		} else if (ptype == SCTP_SET_PRIM_ADDR) {
6409 			struct sctp_asconf_addr_param lstore, *fee;
6410 			int lptype;
6411 			struct sockaddr *lsa = NULL;
6412 
6413 #ifdef INET
6414 			struct sctp_asconf_addrv4_param *fii;
6415 
6416 #endif
6417 
6418 			if (stcb->asoc.asconf_supported == 0) {
6419 				return (-100);
6420 			}
6421 			if (plen > sizeof(lstore)) {
6422 				return (-23);
6423 			}
6424 			phdr = sctp_get_next_param(m, offset,
6425 			    (struct sctp_paramhdr *)&lstore,
6426 			    min(plen, sizeof(lstore)));
6427 			if (phdr == NULL) {
6428 				return (-24);
6429 			}
6430 			fee = (struct sctp_asconf_addr_param *)phdr;
6431 			lptype = ntohs(fee->addrp.ph.param_type);
6432 			switch (lptype) {
6433 #ifdef INET
6434 			case SCTP_IPV4_ADDRESS:
6435 				if (plen !=
6436 				    sizeof(struct sctp_asconf_addrv4_param)) {
6437 					SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6438 					    (int)sizeof(struct sctp_asconf_addrv4_param),
6439 					    plen);
6440 				} else {
6441 					fii = (struct sctp_asconf_addrv4_param *)fee;
6442 					sin.sin_addr.s_addr = fii->addrp.addr;
6443 					lsa = (struct sockaddr *)&sin;
6444 				}
6445 				break;
6446 #endif
6447 #ifdef INET6
6448 			case SCTP_IPV6_ADDRESS:
6449 				if (plen !=
6450 				    sizeof(struct sctp_asconf_addr_param)) {
6451 					SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6452 					    (int)sizeof(struct sctp_asconf_addr_param),
6453 					    plen);
6454 				} else {
6455 					memcpy(sin6.sin6_addr.s6_addr,
6456 					    fee->addrp.addr,
6457 					    sizeof(fee->addrp.addr));
6458 					lsa = (struct sockaddr *)&sin6;
6459 				}
6460 				break;
6461 #endif
6462 			default:
6463 				break;
6464 			}
6465 			if (lsa) {
6466 				(void)sctp_set_primary_addr(stcb, sa, NULL);
6467 			}
6468 		} else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6469 			stcb->asoc.peer_supports_nat = 1;
6470 		} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6471 			/* Peer supports pr-sctp */
6472 			peer_supports_prsctp = 1;
6473 		} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6474 			/* A supported extension chunk */
6475 			struct sctp_supported_chunk_types_param *pr_supported;
6476 			uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6477 			int num_ent, i;
6478 
6479 			phdr = sctp_get_next_param(m, offset,
6480 			    (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6481 			if (phdr == NULL) {
6482 				return (-25);
6483 			}
6484 			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6485 			num_ent = plen - sizeof(struct sctp_paramhdr);
6486 			for (i = 0; i < num_ent; i++) {
6487 				switch (pr_supported->chunk_types[i]) {
6488 				case SCTP_ASCONF:
6489 					peer_supports_asconf = 1;
6490 					break;
6491 				case SCTP_ASCONF_ACK:
6492 					peer_supports_asconf_ack = 1;
6493 					break;
6494 				case SCTP_FORWARD_CUM_TSN:
6495 					peer_supports_prsctp = 1;
6496 					break;
6497 				case SCTP_PACKET_DROPPED:
6498 					peer_supports_pktdrop = 1;
6499 					break;
6500 				case SCTP_NR_SELECTIVE_ACK:
6501 					peer_supports_nrsack = 1;
6502 					break;
6503 				case SCTP_STREAM_RESET:
6504 					peer_supports_reconfig = 1;
6505 					break;
6506 				case SCTP_AUTHENTICATION:
6507 					peer_supports_auth = 1;
6508 					break;
6509 				case SCTP_IDATA:
6510 					peer_supports_idata = 1;
6511 					break;
6512 				default:
6513 					/* one I have not learned yet */
6514 					break;
6515 
6516 				}
6517 			}
6518 		} else if (ptype == SCTP_RANDOM) {
6519 			if (plen > sizeof(random_store))
6520 				break;
6521 			if (got_random) {
6522 				/* already processed a RANDOM */
6523 				goto next_param;
6524 			}
6525 			phdr = sctp_get_next_param(m, offset,
6526 			    (struct sctp_paramhdr *)random_store,
6527 			    min(sizeof(random_store), plen));
6528 			if (phdr == NULL)
6529 				return (-26);
6530 			p_random = (struct sctp_auth_random *)phdr;
6531 			random_len = plen - sizeof(*p_random);
6532 			/* enforce the random length */
6533 			if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6534 				SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6535 				return (-27);
6536 			}
6537 			got_random = 1;
6538 		} else if (ptype == SCTP_HMAC_LIST) {
6539 			uint16_t num_hmacs;
6540 			uint16_t i;
6541 
6542 			if (plen > sizeof(hmacs_store))
6543 				break;
6544 			if (got_hmacs) {
6545 				/* already processed a HMAC list */
6546 				goto next_param;
6547 			}
6548 			phdr = sctp_get_next_param(m, offset,
6549 			    (struct sctp_paramhdr *)hmacs_store,
6550 			    min(plen, sizeof(hmacs_store)));
6551 			if (phdr == NULL)
6552 				return (-28);
6553 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
6554 			hmacs_len = plen - sizeof(*hmacs);
6555 			num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6556 			/* validate the hmac list */
6557 			if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6558 				return (-29);
6559 			}
6560 			if (stcb->asoc.peer_hmacs != NULL)
6561 				sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6562 			stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6563 			if (stcb->asoc.peer_hmacs != NULL) {
6564 				for (i = 0; i < num_hmacs; i++) {
6565 					(void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6566 					    ntohs(hmacs->hmac_ids[i]));
6567 				}
6568 			}
6569 			got_hmacs = 1;
6570 		} else if (ptype == SCTP_CHUNK_LIST) {
6571 			int i;
6572 
6573 			if (plen > sizeof(chunks_store))
6574 				break;
6575 			if (got_chklist) {
6576 				/* already processed a Chunks list */
6577 				goto next_param;
6578 			}
6579 			phdr = sctp_get_next_param(m, offset,
6580 			    (struct sctp_paramhdr *)chunks_store,
6581 			    min(plen, sizeof(chunks_store)));
6582 			if (phdr == NULL)
6583 				return (-30);
6584 			chunks = (struct sctp_auth_chunk_list *)phdr;
6585 			num_chunks = plen - sizeof(*chunks);
6586 			if (stcb->asoc.peer_auth_chunks != NULL)
6587 				sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6588 			else
6589 				stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6590 			for (i = 0; i < num_chunks; i++) {
6591 				(void)sctp_auth_add_chunk(chunks->chunk_types[i],
6592 				    stcb->asoc.peer_auth_chunks);
6593 				/* record asconf/asconf-ack if listed */
6594 				if (chunks->chunk_types[i] == SCTP_ASCONF)
6595 					saw_asconf = 1;
6596 				if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6597 					saw_asconf_ack = 1;
6598 
6599 			}
6600 			got_chklist = 1;
6601 		} else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6602 			    (ptype == SCTP_STATE_COOKIE) ||
6603 			    (ptype == SCTP_UNRECOG_PARAM) ||
6604 			    (ptype == SCTP_COOKIE_PRESERVE) ||
6605 			    (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6606 			    (ptype == SCTP_ADD_IP_ADDRESS) ||
6607 			    (ptype == SCTP_DEL_IP_ADDRESS) ||
6608 			    (ptype == SCTP_ERROR_CAUSE_IND) ||
6609 		    (ptype == SCTP_SUCCESS_REPORT)) {
6610 			 /* don't care */ ;
6611 		} else {
6612 			if ((ptype & 0x8000) == 0x0000) {
6613 				/*
6614 				 * must stop processing the rest of the
6615 				 * param's. Any report bits were handled
6616 				 * with the call to
6617 				 * sctp_arethere_unrecognized_parameters()
6618 				 * when the INIT or INIT-ACK was first seen.
6619 				 */
6620 				break;
6621 			}
6622 		}
6623 
6624 next_param:
6625 		offset += SCTP_SIZE32(plen);
6626 		if (offset >= limit) {
6627 			break;
6628 		}
6629 		phdr = sctp_get_next_param(m, offset, &parm_buf,
6630 		    sizeof(parm_buf));
6631 	}
6632 	/* Now check to see if we need to purge any addresses */
6633 	TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6634 		if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6635 		    SCTP_ADDR_NOT_IN_ASSOC) {
6636 			/* This address has been removed from the asoc */
6637 			/* remove and free it */
6638 			stcb->asoc.numnets--;
6639 			TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6640 			sctp_free_remote_addr(net);
6641 			if (net == stcb->asoc.primary_destination) {
6642 				stcb->asoc.primary_destination = NULL;
6643 				sctp_select_primary_destination(stcb);
6644 			}
6645 		}
6646 	}
6647 	if ((stcb->asoc.ecn_supported == 1) &&
6648 	    (peer_supports_ecn == 0)) {
6649 		stcb->asoc.ecn_supported = 0;
6650 	}
6651 	if ((stcb->asoc.prsctp_supported == 1) &&
6652 	    (peer_supports_prsctp == 0)) {
6653 		stcb->asoc.prsctp_supported = 0;
6654 	}
6655 	if ((stcb->asoc.auth_supported == 1) &&
6656 	    ((peer_supports_auth == 0) ||
6657 	    (got_random == 0) || (got_hmacs == 0))) {
6658 		stcb->asoc.auth_supported = 0;
6659 	}
6660 	if ((stcb->asoc.asconf_supported == 1) &&
6661 	    ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6662 	    (stcb->asoc.auth_supported == 0) ||
6663 	    (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6664 		stcb->asoc.asconf_supported = 0;
6665 	}
6666 	if ((stcb->asoc.reconfig_supported == 1) &&
6667 	    (peer_supports_reconfig == 0)) {
6668 		stcb->asoc.reconfig_supported = 0;
6669 	}
6670 	if ((stcb->asoc.idata_supported == 1) &&
6671 	    (peer_supports_idata == 0)) {
6672 		stcb->asoc.idata_supported = 0;
6673 	}
6674 	if ((stcb->asoc.nrsack_supported == 1) &&
6675 	    (peer_supports_nrsack == 0)) {
6676 		stcb->asoc.nrsack_supported = 0;
6677 	}
6678 	if ((stcb->asoc.pktdrop_supported == 1) &&
6679 	    (peer_supports_pktdrop == 0)) {
6680 		stcb->asoc.pktdrop_supported = 0;
6681 	}
6682 	/* validate authentication required parameters */
6683 	if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6684 		/* peer does not support auth but sent a chunks list? */
6685 		return (-31);
6686 	}
6687 	if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6688 		/* peer supports asconf but not auth? */
6689 		return (-32);
6690 	} else if ((peer_supports_asconf == 1) &&
6691 		    (peer_supports_auth == 1) &&
6692 	    ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6693 		return (-33);
6694 	}
6695 	/* concatenate the full random key */
6696 	keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6697 	if (chunks != NULL) {
6698 		keylen += sizeof(*chunks) + num_chunks;
6699 	}
6700 	new_key = sctp_alloc_key(keylen);
6701 	if (new_key != NULL) {
6702 		/* copy in the RANDOM */
6703 		if (p_random != NULL) {
6704 			keylen = sizeof(*p_random) + random_len;
6705 			bcopy(p_random, new_key->key, keylen);
6706 		}
6707 		/* append in the AUTH chunks */
6708 		if (chunks != NULL) {
6709 			bcopy(chunks, new_key->key + keylen,
6710 			    sizeof(*chunks) + num_chunks);
6711 			keylen += sizeof(*chunks) + num_chunks;
6712 		}
6713 		/* append in the HMACs */
6714 		if (hmacs != NULL) {
6715 			bcopy(hmacs, new_key->key + keylen,
6716 			    sizeof(*hmacs) + hmacs_len);
6717 		}
6718 	} else {
6719 		/* failed to get memory for the key */
6720 		return (-34);
6721 	}
6722 	if (stcb->asoc.authinfo.peer_random != NULL)
6723 		sctp_free_key(stcb->asoc.authinfo.peer_random);
6724 	stcb->asoc.authinfo.peer_random = new_key;
6725 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6726 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6727 
6728 	return (0);
6729 }
6730 
6731 int
6732 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6733     struct sctp_nets *net)
6734 {
6735 	/* make sure the requested primary address exists in the assoc */
6736 	if (net == NULL && sa)
6737 		net = sctp_findnet(stcb, sa);
6738 
6739 	if (net == NULL) {
6740 		/* didn't find the requested primary address! */
6741 		return (-1);
6742 	} else {
6743 		/* set the primary address */
6744 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6745 			/* Must be confirmed, so queue to set */
6746 			net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6747 			return (0);
6748 		}
6749 		stcb->asoc.primary_destination = net;
6750 		if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6751 			sctp_free_remote_addr(stcb->asoc.alternate);
6752 			stcb->asoc.alternate = NULL;
6753 		}
6754 		net = TAILQ_FIRST(&stcb->asoc.nets);
6755 		if (net != stcb->asoc.primary_destination) {
6756 			/*
6757 			 * first one on the list is NOT the primary
6758 			 * sctp_cmpaddr() is much more efficient if the
6759 			 * primary is the first on the list, make it so.
6760 			 */
6761 			TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6762 			TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6763 		}
6764 		return (0);
6765 	}
6766 }
6767 
6768 int
6769 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6770 {
6771 	/*
6772 	 * This function serves two purposes. It will see if a TAG can be
6773 	 * re-used and return 1 for yes it is ok and 0 for don't use that
6774 	 * tag. A secondary function it will do is purge out old tags that
6775 	 * can be removed.
6776 	 */
6777 	struct sctpvtaghead *chain;
6778 	struct sctp_tagblock *twait_block;
6779 	struct sctpasochead *head;
6780 	struct sctp_tcb *stcb;
6781 	int i;
6782 
6783 	SCTP_INP_INFO_RLOCK();
6784 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6785 	    SCTP_BASE_INFO(hashasocmark))];
6786 	LIST_FOREACH(stcb, head, sctp_asocs) {
6787 		/*
6788 		 * We choose not to lock anything here. TCB's can't be
6789 		 * removed since we have the read lock, so they can't be
6790 		 * freed on us, same thing for the INP. I may be wrong with
6791 		 * this assumption, but we will go with it for now :-)
6792 		 */
6793 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6794 			continue;
6795 		}
6796 		if (stcb->asoc.my_vtag == tag) {
6797 			/* candidate */
6798 			if (stcb->rport != rport) {
6799 				continue;
6800 			}
6801 			if (stcb->sctp_ep->sctp_lport != lport) {
6802 				continue;
6803 			}
6804 			/* Its a used tag set */
6805 			SCTP_INP_INFO_RUNLOCK();
6806 			return (0);
6807 		}
6808 	}
6809 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6810 	/* Now what about timed wait ? */
6811 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6812 		/*
6813 		 * Block(s) are present, lets see if we have this tag in the
6814 		 * list
6815 		 */
6816 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6817 			if (twait_block->vtag_block[i].v_tag == 0) {
6818 				/* not used */
6819 				continue;
6820 			} else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6821 			    now->tv_sec) {
6822 				/* Audit expires this guy */
6823 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
6824 				twait_block->vtag_block[i].v_tag = 0;
6825 				twait_block->vtag_block[i].lport = 0;
6826 				twait_block->vtag_block[i].rport = 0;
6827 			} else if ((twait_block->vtag_block[i].v_tag == tag) &&
6828 				    (twait_block->vtag_block[i].lport == lport) &&
6829 			    (twait_block->vtag_block[i].rport == rport)) {
6830 				/* Bad tag, sorry :< */
6831 				SCTP_INP_INFO_RUNLOCK();
6832 				return (0);
6833 			}
6834 		}
6835 	}
6836 	SCTP_INP_INFO_RUNLOCK();
6837 	return (1);
6838 }
6839 
6840 static void
6841 sctp_drain_mbufs(struct sctp_tcb *stcb)
6842 {
6843 	/*
6844 	 * We must hunt this association for MBUF's past the cumack (i.e.
6845 	 * out of order data that we can renege on).
6846 	 */
6847 	struct sctp_association *asoc;
6848 	struct sctp_tmit_chunk *chk, *nchk;
6849 	uint32_t cumulative_tsn_p1;
6850 	struct sctp_queued_to_read *ctl, *nctl;
6851 	int cnt, strmat;
6852 	uint32_t gap, i;
6853 	int fnd = 0;
6854 
6855 	/* We look for anything larger than the cum-ack + 1 */
6856 
6857 	asoc = &stcb->asoc;
6858 	if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6859 		/* none we can reneg on. */
6860 		return;
6861 	}
6862 	SCTP_STAT_INCR(sctps_protocol_drains_done);
6863 	cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6864 	cnt = 0;
6865 	/* Ok that was fun, now we will drain all the inbound streams? */
6866 	for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6867 		TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
6868 #ifdef INVARIANTS
6869 			if (ctl->on_strm_q != SCTP_ON_ORDERED) {
6870 				panic("Huh control: %p on_q: %d -- not ordered?",
6871 				    ctl, ctl->on_strm_q);
6872 			}
6873 #endif
6874 			if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6875 				/* Yep it is above cum-ack */
6876 				cnt++;
6877 				SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6878 				asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6879 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6880 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6881 				if (ctl->on_read_q) {
6882 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6883 					ctl->on_read_q = 0;
6884 				}
6885 				TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
6886 				ctl->on_strm_q = 0;
6887 				if (ctl->data) {
6888 					sctp_m_freem(ctl->data);
6889 					ctl->data = NULL;
6890 				}
6891 				sctp_free_remote_addr(ctl->whoFrom);
6892 				/* Now its reasm? */
6893 				TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6894 					cnt++;
6895 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6896 					asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6897 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6898 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6899 					TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6900 					if (chk->data) {
6901 						sctp_m_freem(chk->data);
6902 						chk->data = NULL;
6903 					}
6904 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6905 				}
6906 				sctp_free_a_readq(stcb, ctl);
6907 			}
6908 		}
6909 		TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
6910 #ifdef INVARIANTS
6911 			if (ctl->on_strm_q != SCTP_ON_UNORDERED) {
6912 				panic("Huh control: %p on_q: %d -- not unordered?",
6913 				    ctl, ctl->on_strm_q);
6914 			}
6915 #endif
6916 			if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6917 				/* Yep it is above cum-ack */
6918 				cnt++;
6919 				SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6920 				asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6921 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6922 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6923 				if (ctl->on_read_q) {
6924 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, ctl, next);
6925 					ctl->on_read_q = 0;
6926 				}
6927 				TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
6928 				ctl->on_strm_q = 0;
6929 				if (ctl->data) {
6930 					sctp_m_freem(ctl->data);
6931 					ctl->data = NULL;
6932 				}
6933 				sctp_free_remote_addr(ctl->whoFrom);
6934 				/* Now its reasm? */
6935 				TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6936 					cnt++;
6937 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6938 					asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6939 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6940 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6941 					TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6942 					if (chk->data) {
6943 						sctp_m_freem(chk->data);
6944 						chk->data = NULL;
6945 					}
6946 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6947 				}
6948 				sctp_free_a_readq(stcb, ctl);
6949 			}
6950 		}
6951 	}
6952 	if (cnt) {
6953 		/* We must back down to see what the new highest is */
6954 		for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6955 			SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6956 			if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6957 				asoc->highest_tsn_inside_map = i;
6958 				fnd = 1;
6959 				break;
6960 			}
6961 		}
6962 		if (!fnd) {
6963 			asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6964 		}
6965 		/*
6966 		 * Question, should we go through the delivery queue? The
6967 		 * only reason things are on here is the app not reading OR
6968 		 * a p-d-api up. An attacker COULD send enough in to
6969 		 * initiate the PD-API and then send a bunch of stuff to
6970 		 * other streams... these would wind up on the delivery
6971 		 * queue.. and then we would not get to them. But in order
6972 		 * to do this I then have to back-track and un-deliver
6973 		 * sequence numbers in streams.. el-yucko. I think for now
6974 		 * we will NOT look at the delivery queue and leave it to be
6975 		 * something to consider later. An alternative would be to
6976 		 * abort the P-D-API with a notification and then deliver
6977 		 * the data.... Or another method might be to keep track of
6978 		 * how many times the situation occurs and if we see a
6979 		 * possible attack underway just abort the association.
6980 		 */
6981 #ifdef SCTP_DEBUG
6982 		SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6983 #endif
6984 		/*
6985 		 * Now do we need to find a new
6986 		 * asoc->highest_tsn_inside_map?
6987 		 */
6988 		asoc->last_revoke_count = cnt;
6989 		(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6990 		/* sa_ignore NO_NULL_CHK */
6991 		sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6992 		sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6993 	}
6994 	/*
6995 	 * Another issue, in un-setting the TSN's in the mapping array we
6996 	 * DID NOT adjust the highest_tsn marker.  This will cause one of
6997 	 * two things to occur. It may cause us to do extra work in checking
6998 	 * for our mapping array movement. More importantly it may cause us
6999 	 * to SACK every datagram. This may not be a bad thing though since
7000 	 * we will recover once we get our cum-ack above and all this stuff
7001 	 * we dumped recovered.
7002 	 */
7003 }
7004 
7005 void
7006 sctp_drain()
7007 {
7008 	/*
7009 	 * We must walk the PCB lists for ALL associations here. The system
7010 	 * is LOW on MBUF's and needs help. This is where reneging will
7011 	 * occur. We really hope this does NOT happen!
7012 	 */
7013 	VNET_ITERATOR_DECL(vnet_iter);
7014 	VNET_LIST_RLOCK_NOSLEEP();
7015 	VNET_FOREACH(vnet_iter) {
7016 		CURVNET_SET(vnet_iter);
7017 		struct sctp_inpcb *inp;
7018 		struct sctp_tcb *stcb;
7019 
7020 		SCTP_STAT_INCR(sctps_protocol_drain_calls);
7021 		if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7022 #ifdef VIMAGE
7023 			continue;
7024 #else
7025 			return;
7026 #endif
7027 		}
7028 		SCTP_INP_INFO_RLOCK();
7029 		LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7030 			/* For each endpoint */
7031 			SCTP_INP_RLOCK(inp);
7032 			LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7033 				/* For each association */
7034 				SCTP_TCB_LOCK(stcb);
7035 				sctp_drain_mbufs(stcb);
7036 				SCTP_TCB_UNLOCK(stcb);
7037 			}
7038 			SCTP_INP_RUNLOCK(inp);
7039 		}
7040 		SCTP_INP_INFO_RUNLOCK();
7041 		CURVNET_RESTORE();
7042 	}
7043 	VNET_LIST_RUNLOCK_NOSLEEP();
7044 }
7045 
7046 /*
7047  * start a new iterator
7048  * iterates through all endpoints and associations based on the pcb_state
7049  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7050  * assocs and "ef" (optional) is executed when the iterator completes.
7051  * "inpf" (optional) is executed for each new endpoint as it is being
7052  * iterated through. inpe (optional) is called when the inp completes
7053  * its way through all the stcbs.
7054  */
7055 int
7056 sctp_initiate_iterator(inp_func inpf,
7057     asoc_func af,
7058     inp_func inpe,
7059     uint32_t pcb_state,
7060     uint32_t pcb_features,
7061     uint32_t asoc_state,
7062     void *argp,
7063     uint32_t argi,
7064     end_func ef,
7065     struct sctp_inpcb *s_inp,
7066     uint8_t chunk_output_off)
7067 {
7068 	struct sctp_iterator *it = NULL;
7069 
7070 	if (af == NULL) {
7071 		return (-1);
7072 	}
7073 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7074 		SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7075 		    SCTP_BASE_VAR(sctp_pcb_initialized));
7076 		return (-1);
7077 	}
7078 	SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7079 	    SCTP_M_ITER);
7080 	if (it == NULL) {
7081 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7082 		return (ENOMEM);
7083 	}
7084 	memset(it, 0, sizeof(*it));
7085 	it->function_assoc = af;
7086 	it->function_inp = inpf;
7087 	if (inpf)
7088 		it->done_current_ep = 0;
7089 	else
7090 		it->done_current_ep = 1;
7091 	it->function_atend = ef;
7092 	it->pointer = argp;
7093 	it->val = argi;
7094 	it->pcb_flags = pcb_state;
7095 	it->pcb_features = pcb_features;
7096 	it->asoc_state = asoc_state;
7097 	it->function_inp_end = inpe;
7098 	it->no_chunk_output = chunk_output_off;
7099 	it->vn = curvnet;
7100 	if (s_inp) {
7101 		/* Assume lock is held here */
7102 		it->inp = s_inp;
7103 		SCTP_INP_INCR_REF(it->inp);
7104 		it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7105 	} else {
7106 		SCTP_INP_INFO_RLOCK();
7107 		it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7108 		if (it->inp) {
7109 			SCTP_INP_INCR_REF(it->inp);
7110 		}
7111 		SCTP_INP_INFO_RUNLOCK();
7112 		it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7113 
7114 	}
7115 	SCTP_IPI_ITERATOR_WQ_LOCK();
7116 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7117 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
7118 		SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7119 		    SCTP_BASE_VAR(sctp_pcb_initialized), it);
7120 		SCTP_FREE(it, SCTP_M_ITER);
7121 		return (-1);
7122 	}
7123 	TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7124 	if (sctp_it_ctl.iterator_running == 0) {
7125 		sctp_wakeup_iterator();
7126 	}
7127 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
7128 	/* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7129 	return (0);
7130 }
7131