xref: /freebsd/sys/netinet/sctp_pcb.c (revision dc318a4ffabcbfa23bb56a33403aad36e6de30af)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions are met:
10  *
11  * a) Redistributions of source code must retain the above copyright notice,
12  *    this list of conditions and the following disclaimer.
13  *
14  * b) Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in
16  *    the documentation and/or other materials provided with the distribution.
17  *
18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
19  *    contributors may be used to endorse or promote products derived
20  *    from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32  * THE POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37 
38 #include <netinet/sctp_os.h>
39 #include <sys/proc.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_pcb.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp.h>
45 #include <netinet/sctp_header.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_output.h>
48 #include <netinet/sctp_timer.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
52 #endif
53 #ifdef INET6
54 #include <netinet6/ip6_var.h>
55 #endif
56 #include <sys/sched.h>
57 #include <sys/smp.h>
58 #include <sys/unistd.h>
59 
60 /* FIX: we don't handle multiple link local scopes */
61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
62 #ifdef INET6
63 int
64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
65 {
66 	struct sockaddr_in6 tmp_a, tmp_b;
67 
68 	memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
69 	if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
70 		return (0);
71 	}
72 	memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
73 	if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
74 		return (0);
75 	}
76 	return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
77 }
78 #endif
79 
80 void
81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
82 {
83 	/*
84 	 * We really don't need to lock this, but I will just because it
85 	 * does not hurt.
86 	 */
87 	SCTP_INP_INFO_RLOCK();
88 	spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
89 	spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
90 	spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
91 	spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
92 	spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
93 	spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
94 	spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
95 	spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
96 	SCTP_INP_INFO_RUNLOCK();
97 }
98 
99 /*-
100  * Addresses are added to VRF's (Virtual Router's). For BSD we
101  * have only the default VRF 0. We maintain a hash list of
102  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
103  * these has a list of addresses. When we add a new address
104  * to a VRF we lookup the ifn/ifn_index, if the ifn does
105  * not exist we create it and add it to the list of IFN's
106  * within the VRF. Once we have the sctp_ifn, we add the
107  * address to the list. So we look something like:
108  *
109  * hash-vrf-table
110  *   vrf-> ifn-> ifn -> ifn
111  *   vrf    |
112  *    ...   +--ifa-> ifa -> ifa
113  *   vrf
114  *
115  * We keep these separate lists since the SCTP subsystem will
116  * point to these from its source address selection nets structure.
117  * When an address is deleted it does not happen right away on
118  * the SCTP side, it gets scheduled. What we do when a
119  * delete happens is immediately remove the address from
120  * the master list and decrement the refcount. As our
121  * addip iterator works through and frees the src address
122  * selection pointing to the sctp_ifa, eventually the refcount
123  * will reach 0 and we will delete it. Note that it is assumed
124  * that any locking on system level ifn/ifa is done at the
125  * caller of these functions and these routines will only
126  * lock the SCTP structures as they add or delete things.
127  *
128  * Other notes on VRF concepts.
129  *  - An endpoint can be in multiple VRF's
130  *  - An association lives within a VRF and only one VRF.
131  *  - Any incoming packet we can deduce the VRF for by
132  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
133  *  - Any downward send call or connect call must supply the
134  *    VRF via ancillary data or via some sort of set default
135  *    VRF socket option call (again for BSD no brainer since
136  *    the VRF is always 0).
137  *  - An endpoint may add multiple VRF's to it.
138  *  - Listening sockets can accept associations in any
139  *    of the VRF's they are in but the assoc will end up
140  *    in only one VRF (gotten from the packet or connect/send).
141  *
142  */
143 
144 struct sctp_vrf *
145 sctp_allocate_vrf(int vrf_id)
146 {
147 	struct sctp_vrf *vrf = NULL;
148 	struct sctp_vrflist *bucket;
149 
150 	/* First allocate the VRF structure */
151 	vrf = sctp_find_vrf(vrf_id);
152 	if (vrf) {
153 		/* Already allocated */
154 		return (vrf);
155 	}
156 	SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
157 	    SCTP_M_VRF);
158 	if (vrf == NULL) {
159 		/* No memory */
160 #ifdef INVARIANTS
161 		panic("No memory for VRF:%d", vrf_id);
162 #endif
163 		return (NULL);
164 	}
165 	/* setup the VRF */
166 	memset(vrf, 0, sizeof(struct sctp_vrf));
167 	vrf->vrf_id = vrf_id;
168 	LIST_INIT(&vrf->ifnlist);
169 	vrf->total_ifa_count = 0;
170 	vrf->refcount = 0;
171 	/* now also setup table ids */
172 	SCTP_INIT_VRF_TABLEID(vrf);
173 	/* Init the HASH of addresses */
174 	vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
175 	    &vrf->vrf_addr_hashmark);
176 	if (vrf->vrf_addr_hash == NULL) {
177 		/* No memory */
178 #ifdef INVARIANTS
179 		panic("No memory for VRF:%d", vrf_id);
180 #endif
181 		SCTP_FREE(vrf, SCTP_M_VRF);
182 		return (NULL);
183 	}
184 
185 	/* Add it to the hash table */
186 	bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
187 	LIST_INSERT_HEAD(bucket, vrf, next_vrf);
188 	atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
189 	return (vrf);
190 }
191 
192 struct sctp_ifn *
193 sctp_find_ifn(void *ifn, uint32_t ifn_index)
194 {
195 	struct sctp_ifn *sctp_ifnp;
196 	struct sctp_ifnlist *hash_ifn_head;
197 
198 	/*
199 	 * We assume the lock is held for the addresses if that's wrong
200 	 * problems could occur :-)
201 	 */
202 	SCTP_IPI_ADDR_LOCK_ASSERT();
203 	hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
204 	LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
205 		if (sctp_ifnp->ifn_index == ifn_index) {
206 			return (sctp_ifnp);
207 		}
208 		if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
209 			return (sctp_ifnp);
210 		}
211 	}
212 	return (NULL);
213 }
214 
215 struct sctp_vrf *
216 sctp_find_vrf(uint32_t vrf_id)
217 {
218 	struct sctp_vrflist *bucket;
219 	struct sctp_vrf *liste;
220 
221 	bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
222 	LIST_FOREACH(liste, bucket, next_vrf) {
223 		if (vrf_id == liste->vrf_id) {
224 			return (liste);
225 		}
226 	}
227 	return (NULL);
228 }
229 
230 void
231 sctp_free_vrf(struct sctp_vrf *vrf)
232 {
233 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
234 		if (vrf->vrf_addr_hash) {
235 			SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
236 			vrf->vrf_addr_hash = NULL;
237 		}
238 		/* We zero'd the count */
239 		LIST_REMOVE(vrf, next_vrf);
240 		SCTP_FREE(vrf, SCTP_M_VRF);
241 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
242 	}
243 }
244 
245 void
246 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
247 {
248 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
249 		/* We zero'd the count */
250 		if (sctp_ifnp->vrf) {
251 			sctp_free_vrf(sctp_ifnp->vrf);
252 		}
253 		SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
254 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
255 	}
256 }
257 
258 void
259 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
260 {
261 	struct sctp_ifn *sctp_ifnp;
262 
263 	sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
264 	if (sctp_ifnp != NULL) {
265 		sctp_ifnp->ifn_mtu = mtu;
266 	}
267 }
268 
269 void
270 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
271 {
272 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
273 		/* We zero'd the count */
274 		if (sctp_ifap->ifn_p) {
275 			sctp_free_ifn(sctp_ifap->ifn_p);
276 		}
277 		SCTP_FREE(sctp_ifap, SCTP_M_IFA);
278 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
279 	}
280 }
281 
282 static void
283 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
284 {
285 	struct sctp_ifn *found;
286 
287 	found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
288 	if (found == NULL) {
289 		/* Not in the list.. sorry */
290 		return;
291 	}
292 	if (hold_addr_lock == 0) {
293 		SCTP_IPI_ADDR_WLOCK();
294 	} else {
295 		SCTP_IPI_ADDR_WLOCK_ASSERT();
296 	}
297 	LIST_REMOVE(sctp_ifnp, next_bucket);
298 	LIST_REMOVE(sctp_ifnp, next_ifn);
299 	if (hold_addr_lock == 0) {
300 		SCTP_IPI_ADDR_WUNLOCK();
301 	}
302 	/* Take away the reference, and possibly free it */
303 	sctp_free_ifn(sctp_ifnp);
304 }
305 
306 void
307 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
308     const char *if_name, uint32_t ifn_index)
309 {
310 	struct sctp_vrf *vrf;
311 	struct sctp_ifa *sctp_ifap;
312 
313 	SCTP_IPI_ADDR_RLOCK();
314 	vrf = sctp_find_vrf(vrf_id);
315 	if (vrf == NULL) {
316 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
317 		goto out;
318 	}
319 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
320 	if (sctp_ifap == NULL) {
321 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
322 		goto out;
323 	}
324 	if (sctp_ifap->ifn_p == NULL) {
325 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
326 		goto out;
327 	}
328 	if (if_name) {
329 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
330 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
331 			    sctp_ifap->ifn_p->ifn_name, if_name);
332 			goto out;
333 		}
334 	} else {
335 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
336 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
337 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
338 			goto out;
339 		}
340 	}
341 
342 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
343 	sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
344 out:
345 	SCTP_IPI_ADDR_RUNLOCK();
346 }
347 
348 void
349 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
350     const char *if_name, uint32_t ifn_index)
351 {
352 	struct sctp_vrf *vrf;
353 	struct sctp_ifa *sctp_ifap;
354 
355 	SCTP_IPI_ADDR_RLOCK();
356 	vrf = sctp_find_vrf(vrf_id);
357 	if (vrf == NULL) {
358 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
359 		goto out;
360 	}
361 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
362 	if (sctp_ifap == NULL) {
363 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
364 		goto out;
365 	}
366 	if (sctp_ifap->ifn_p == NULL) {
367 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
368 		goto out;
369 	}
370 	if (if_name) {
371 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
372 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
373 			    sctp_ifap->ifn_p->ifn_name, if_name);
374 			goto out;
375 		}
376 	} else {
377 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
378 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
379 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
380 			goto out;
381 		}
382 	}
383 
384 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
385 	sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
386 out:
387 	SCTP_IPI_ADDR_RUNLOCK();
388 }
389 
390 /*-
391  * Add an ifa to an ifn.
392  * Register the interface as necessary.
393  * NOTE: ADDR write lock MUST be held.
394  */
395 static void
396 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
397 {
398 	int ifa_af;
399 
400 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
401 	sctp_ifap->ifn_p = sctp_ifnp;
402 	atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
403 	/* update address counts */
404 	sctp_ifnp->ifa_count++;
405 	ifa_af = sctp_ifap->address.sa.sa_family;
406 	switch (ifa_af) {
407 #ifdef INET
408 	case AF_INET:
409 		sctp_ifnp->num_v4++;
410 		break;
411 #endif
412 #ifdef INET6
413 	case AF_INET6:
414 		sctp_ifnp->num_v6++;
415 		break;
416 #endif
417 	default:
418 		break;
419 	}
420 	if (sctp_ifnp->ifa_count == 1) {
421 		/* register the new interface */
422 		sctp_ifnp->registered_af = ifa_af;
423 	}
424 }
425 
426 /*-
427  * Remove an ifa from its ifn.
428  * If no more addresses exist, remove the ifn too. Otherwise, re-register
429  * the interface based on the remaining address families left.
430  * NOTE: ADDR write lock MUST be held.
431  */
432 static void
433 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
434 {
435 	LIST_REMOVE(sctp_ifap, next_ifa);
436 	if (sctp_ifap->ifn_p) {
437 		/* update address counts */
438 		sctp_ifap->ifn_p->ifa_count--;
439 		switch (sctp_ifap->address.sa.sa_family) {
440 #ifdef INET
441 		case AF_INET:
442 			sctp_ifap->ifn_p->num_v4--;
443 			break;
444 #endif
445 #ifdef INET6
446 		case AF_INET6:
447 			sctp_ifap->ifn_p->num_v6--;
448 			break;
449 #endif
450 		default:
451 			break;
452 		}
453 
454 		if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
455 			/* remove the ifn, possibly freeing it */
456 			sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
457 		} else {
458 			/* re-register address family type, if needed */
459 			if ((sctp_ifap->ifn_p->num_v6 == 0) &&
460 			    (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
461 				sctp_ifap->ifn_p->registered_af = AF_INET;
462 			} else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
463 			    (sctp_ifap->ifn_p->registered_af == AF_INET)) {
464 				sctp_ifap->ifn_p->registered_af = AF_INET6;
465 			}
466 			/* free the ifn refcount */
467 			sctp_free_ifn(sctp_ifap->ifn_p);
468 		}
469 		sctp_ifap->ifn_p = NULL;
470 	}
471 }
472 
473 struct sctp_ifa *
474 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
475     uint32_t ifn_type, const char *if_name, void *ifa,
476     struct sockaddr *addr, uint32_t ifa_flags,
477     int dynamic_add)
478 {
479 	struct sctp_vrf *vrf;
480 	struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
481 	struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
482 	struct sctp_ifalist *hash_addr_head;
483 	struct sctp_ifnlist *hash_ifn_head;
484 	uint32_t hash_of_addr;
485 	int new_ifn_af = 0;
486 
487 #ifdef SCTP_DEBUG
488 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
489 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
490 #endif
491 	SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
492 	    sizeof(struct sctp_ifn), SCTP_M_IFN);
493 	if (new_sctp_ifnp == NULL) {
494 #ifdef INVARIANTS
495 		panic("No memory for IFN");
496 #endif
497 		return (NULL);
498 	}
499 	SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
500 	if (new_sctp_ifap == NULL) {
501 #ifdef INVARIANTS
502 		panic("No memory for IFA");
503 #endif
504 		SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
505 		return (NULL);
506 	}
507 
508 	SCTP_IPI_ADDR_WLOCK();
509 	sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
510 	if (sctp_ifnp) {
511 		vrf = sctp_ifnp->vrf;
512 	} else {
513 		vrf = sctp_find_vrf(vrf_id);
514 		if (vrf == NULL) {
515 			vrf = sctp_allocate_vrf(vrf_id);
516 			if (vrf == NULL) {
517 				SCTP_IPI_ADDR_WUNLOCK();
518 				SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
519 				SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
520 				return (NULL);
521 			}
522 		}
523 	}
524 	if (sctp_ifnp == NULL) {
525 		/*
526 		 * build one and add it, can't hold lock until after malloc
527 		 * done though.
528 		 */
529 		sctp_ifnp = new_sctp_ifnp;
530 		new_sctp_ifnp = NULL;
531 		memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
532 		sctp_ifnp->ifn_index = ifn_index;
533 		sctp_ifnp->ifn_p = ifn;
534 		sctp_ifnp->ifn_type = ifn_type;
535 		sctp_ifnp->refcount = 0;
536 		sctp_ifnp->vrf = vrf;
537 		atomic_add_int(&vrf->refcount, 1);
538 		sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
539 		if (if_name != NULL) {
540 			SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
541 		} else {
542 			SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
543 		}
544 		hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
545 		LIST_INIT(&sctp_ifnp->ifalist);
546 		LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
547 		LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
548 		atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
549 		new_ifn_af = 1;
550 	}
551 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
552 	if (sctp_ifap) {
553 		/* Hmm, it already exists? */
554 		if ((sctp_ifap->ifn_p) &&
555 		    (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
556 			SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
557 			    sctp_ifap->ifn_p->ifn_name, ifn_index,
558 			    (void *)sctp_ifap);
559 			if (new_ifn_af) {
560 				/* Remove the created one that we don't want */
561 				sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
562 			}
563 			if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
564 				/* easy to solve, just switch back to active */
565 				SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
566 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
567 				sctp_ifap->ifn_p = sctp_ifnp;
568 				atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
569 			}
570 	exit_stage_left:
571 			SCTP_IPI_ADDR_WUNLOCK();
572 			if (new_sctp_ifnp != NULL) {
573 				SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
574 			}
575 			SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
576 			return (sctp_ifap);
577 		} else {
578 			if (sctp_ifap->ifn_p) {
579 				/*
580 				 * The last IFN gets the address, remove the
581 				 * old one
582 				 */
583 				SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
584 				    (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
585 				    sctp_ifap->ifn_p->ifn_index, if_name,
586 				    ifn_index);
587 				/* remove the address from the old ifn */
588 				sctp_remove_ifa_from_ifn(sctp_ifap);
589 				/* move the address over to the new ifn */
590 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
591 				goto exit_stage_left;
592 			} else {
593 				/* repair ifnp which was NULL ? */
594 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
595 				SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
596 				    (void *)sctp_ifnp, (void *)sctp_ifap);
597 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
598 			}
599 			goto exit_stage_left;
600 		}
601 	}
602 	sctp_ifap = new_sctp_ifap;
603 	memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
604 	sctp_ifap->ifn_p = sctp_ifnp;
605 	atomic_add_int(&sctp_ifnp->refcount, 1);
606 	sctp_ifap->vrf_id = vrf_id;
607 	sctp_ifap->ifa = ifa;
608 	memcpy(&sctp_ifap->address, addr, addr->sa_len);
609 	sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
610 	sctp_ifap->flags = ifa_flags;
611 	/* Set scope */
612 	switch (sctp_ifap->address.sa.sa_family) {
613 #ifdef INET
614 	case AF_INET:
615 		{
616 			struct sockaddr_in *sin;
617 
618 			sin = &sctp_ifap->address.sin;
619 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
620 			    (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
621 				sctp_ifap->src_is_loop = 1;
622 			}
623 			if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
624 				sctp_ifap->src_is_priv = 1;
625 			}
626 			sctp_ifnp->num_v4++;
627 			if (new_ifn_af)
628 				new_ifn_af = AF_INET;
629 			break;
630 		}
631 #endif
632 #ifdef INET6
633 	case AF_INET6:
634 		{
635 			/* ok to use deprecated addresses? */
636 			struct sockaddr_in6 *sin6;
637 
638 			sin6 = &sctp_ifap->address.sin6;
639 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
640 			    (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
641 				sctp_ifap->src_is_loop = 1;
642 			}
643 			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
644 				sctp_ifap->src_is_priv = 1;
645 			}
646 			sctp_ifnp->num_v6++;
647 			if (new_ifn_af)
648 				new_ifn_af = AF_INET6;
649 			break;
650 		}
651 #endif
652 	default:
653 		new_ifn_af = 0;
654 		break;
655 	}
656 	hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
657 
658 	if ((sctp_ifap->src_is_priv == 0) &&
659 	    (sctp_ifap->src_is_loop == 0)) {
660 		sctp_ifap->src_is_glob = 1;
661 	}
662 	hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
663 	LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
664 	sctp_ifap->refcount = 1;
665 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
666 	sctp_ifnp->ifa_count++;
667 	vrf->total_ifa_count++;
668 	atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
669 	if (new_ifn_af) {
670 		sctp_ifnp->registered_af = new_ifn_af;
671 	}
672 	SCTP_IPI_ADDR_WUNLOCK();
673 	if (new_sctp_ifnp != NULL) {
674 		SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
675 	}
676 
677 	if (dynamic_add) {
678 		/*
679 		 * Bump up the refcount so that when the timer completes it
680 		 * will drop back down.
681 		 */
682 		struct sctp_laddr *wi;
683 
684 		atomic_add_int(&sctp_ifap->refcount, 1);
685 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
686 		if (wi == NULL) {
687 			/*
688 			 * Gak, what can we do? We have lost an address
689 			 * change can you say HOSED?
690 			 */
691 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
692 			/* Opps, must decrement the count */
693 			sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
694 			    if_name);
695 			return (NULL);
696 		}
697 		SCTP_INCR_LADDR_COUNT();
698 		memset(wi, 0, sizeof(*wi));
699 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
700 		wi->ifa = sctp_ifap;
701 		wi->action = SCTP_ADD_IP_ADDRESS;
702 
703 		SCTP_WQ_ADDR_LOCK();
704 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
705 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
706 		    (struct sctp_inpcb *)NULL,
707 		    (struct sctp_tcb *)NULL,
708 		    (struct sctp_nets *)NULL);
709 		SCTP_WQ_ADDR_UNLOCK();
710 	} else {
711 		/* it's ready for use */
712 		sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
713 	}
714 	return (sctp_ifap);
715 }
716 
717 void
718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
719     uint32_t ifn_index, const char *if_name)
720 {
721 	struct sctp_vrf *vrf;
722 	struct sctp_ifa *sctp_ifap = NULL;
723 
724 	SCTP_IPI_ADDR_WLOCK();
725 	vrf = sctp_find_vrf(vrf_id);
726 	if (vrf == NULL) {
727 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
728 		goto out_now;
729 	}
730 
731 #ifdef SCTP_DEBUG
732 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
733 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
734 #endif
735 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
736 	if (sctp_ifap) {
737 		/* Validate the delete */
738 		if (sctp_ifap->ifn_p) {
739 			int valid = 0;
740 
741 			/*-
742 			 * The name has priority over the ifn_index
743 			 * if its given.
744 			 */
745 			if (if_name) {
746 				if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
747 					/* They match its a correct delete */
748 					valid = 1;
749 				}
750 			}
751 			if (!valid) {
752 				/* last ditch check ifn_index */
753 				if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
754 					valid = 1;
755 				}
756 			}
757 			if (!valid) {
758 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
759 				    ifn_index, ((if_name == NULL) ? "NULL" : if_name));
760 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
761 				    sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
762 				SCTP_IPI_ADDR_WUNLOCK();
763 				return;
764 			}
765 		}
766 		SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
767 		sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
768 		/*
769 		 * We don't set the flag. This means that the structure will
770 		 * hang around in EP's that have bound specific to it until
771 		 * they close. This gives us TCP like behavior if someone
772 		 * removes an address (or for that matter adds it right
773 		 * back).
774 		 */
775 		/* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
776 		vrf->total_ifa_count--;
777 		LIST_REMOVE(sctp_ifap, next_bucket);
778 		sctp_remove_ifa_from_ifn(sctp_ifap);
779 	}
780 #ifdef SCTP_DEBUG
781 	else {
782 		SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
783 		    ifn_index);
784 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
785 	}
786 #endif
787 
788 out_now:
789 	SCTP_IPI_ADDR_WUNLOCK();
790 	if (sctp_ifap) {
791 		struct sctp_laddr *wi;
792 
793 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
794 		if (wi == NULL) {
795 			/*
796 			 * Gak, what can we do? We have lost an address
797 			 * change can you say HOSED?
798 			 */
799 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
800 
801 			/* Oops, must decrement the count */
802 			sctp_free_ifa(sctp_ifap);
803 			return;
804 		}
805 		SCTP_INCR_LADDR_COUNT();
806 		memset(wi, 0, sizeof(*wi));
807 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
808 		wi->ifa = sctp_ifap;
809 		wi->action = SCTP_DEL_IP_ADDRESS;
810 		SCTP_WQ_ADDR_LOCK();
811 		/*
812 		 * Should this really be a tailq? As it is we will process
813 		 * the newest first :-0
814 		 */
815 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
816 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
817 		    (struct sctp_inpcb *)NULL,
818 		    (struct sctp_tcb *)NULL,
819 		    (struct sctp_nets *)NULL);
820 		SCTP_WQ_ADDR_UNLOCK();
821 	}
822 	return;
823 }
824 
825 static int
826 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
827 {
828 	int loopback_scope;
829 #if defined(INET)
830 	int ipv4_local_scope, ipv4_addr_legal;
831 #endif
832 #if defined(INET6)
833 	int local_scope, site_scope, ipv6_addr_legal;
834 #endif
835 	struct sctp_vrf *vrf;
836 	struct sctp_ifn *sctp_ifn;
837 	struct sctp_ifa *sctp_ifa;
838 
839 	loopback_scope = stcb->asoc.scope.loopback_scope;
840 #if defined(INET)
841 	ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
842 	ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
843 #endif
844 #if defined(INET6)
845 	local_scope = stcb->asoc.scope.local_scope;
846 	site_scope = stcb->asoc.scope.site_scope;
847 	ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
848 #endif
849 
850 	SCTP_IPI_ADDR_RLOCK();
851 	vrf = sctp_find_vrf(stcb->asoc.vrf_id);
852 	if (vrf == NULL) {
853 		/* no vrf, no addresses */
854 		SCTP_IPI_ADDR_RUNLOCK();
855 		return (0);
856 	}
857 
858 	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
859 		LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
860 			if ((loopback_scope == 0) &&
861 			    SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
862 				continue;
863 			}
864 			LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
865 				if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
866 				    (!sctp_is_addr_pending(stcb, sctp_ifa))) {
867 					/*
868 					 * We allow pending addresses, where
869 					 * we have sent an asconf-add to be
870 					 * considered valid.
871 					 */
872 					continue;
873 				}
874 				if (sctp_ifa->address.sa.sa_family != to->sa_family) {
875 					continue;
876 				}
877 				switch (sctp_ifa->address.sa.sa_family) {
878 #ifdef INET
879 				case AF_INET:
880 					if (ipv4_addr_legal) {
881 						struct sockaddr_in *sin,
882 						           *rsin;
883 
884 						sin = &sctp_ifa->address.sin;
885 						rsin = (struct sockaddr_in *)to;
886 						if ((ipv4_local_scope == 0) &&
887 						    IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
888 							continue;
889 						}
890 						if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
891 						    &sin->sin_addr) != 0) {
892 							continue;
893 						}
894 						if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
895 							SCTP_IPI_ADDR_RUNLOCK();
896 							return (1);
897 						}
898 					}
899 					break;
900 #endif
901 #ifdef INET6
902 				case AF_INET6:
903 					if (ipv6_addr_legal) {
904 						struct sockaddr_in6 *sin6,
905 						            *rsin6;
906 
907 						sin6 = &sctp_ifa->address.sin6;
908 						rsin6 = (struct sockaddr_in6 *)to;
909 						if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
910 						    &sin6->sin6_addr) != 0) {
911 							continue;
912 						}
913 						if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
914 							if (local_scope == 0)
915 								continue;
916 							if (sin6->sin6_scope_id == 0) {
917 								if (sa6_recoverscope(sin6) != 0)
918 									continue;
919 							}
920 						}
921 						if ((site_scope == 0) &&
922 						    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
923 							continue;
924 						}
925 						if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
926 							SCTP_IPI_ADDR_RUNLOCK();
927 							return (1);
928 						}
929 					}
930 					break;
931 #endif
932 				default:
933 					/* TSNH */
934 					break;
935 				}
936 			}
937 		}
938 	} else {
939 		struct sctp_laddr *laddr;
940 
941 		LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
942 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
943 				SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
944 				continue;
945 			}
946 			if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
947 			    (!sctp_is_addr_pending(stcb, laddr->ifa))) {
948 				/*
949 				 * We allow pending addresses, where we have
950 				 * sent an asconf-add to be considered
951 				 * valid.
952 				 */
953 				continue;
954 			}
955 			if (laddr->ifa->address.sa.sa_family != to->sa_family) {
956 				continue;
957 			}
958 			switch (to->sa_family) {
959 #ifdef INET
960 			case AF_INET:
961 				{
962 					struct sockaddr_in *sin, *rsin;
963 
964 					sin = &laddr->ifa->address.sin;
965 					rsin = (struct sockaddr_in *)to;
966 					if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
967 						SCTP_IPI_ADDR_RUNLOCK();
968 						return (1);
969 					}
970 					break;
971 				}
972 #endif
973 #ifdef INET6
974 			case AF_INET6:
975 				{
976 					struct sockaddr_in6 *sin6, *rsin6;
977 
978 					sin6 = &laddr->ifa->address.sin6;
979 					rsin6 = (struct sockaddr_in6 *)to;
980 					if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
981 						SCTP_IPI_ADDR_RUNLOCK();
982 						return (1);
983 					}
984 					break;
985 				}
986 
987 #endif
988 			default:
989 				/* TSNH */
990 				break;
991 			}
992 		}
993 	}
994 	SCTP_IPI_ADDR_RUNLOCK();
995 	return (0);
996 }
997 
998 static struct sctp_tcb *
999 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1000     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1001 {
1002 	/**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1003 	/*
1004 	 * If we support the TCP model, then we must now dig through to see
1005 	 * if we can find our endpoint in the list of tcp ep's.
1006 	 */
1007 	uint16_t lport, rport;
1008 	struct sctppcbhead *ephead;
1009 	struct sctp_inpcb *inp;
1010 	struct sctp_laddr *laddr;
1011 	struct sctp_tcb *stcb;
1012 	struct sctp_nets *net;
1013 
1014 	if ((to == NULL) || (from == NULL)) {
1015 		return (NULL);
1016 	}
1017 
1018 	switch (to->sa_family) {
1019 #ifdef INET
1020 	case AF_INET:
1021 		if (from->sa_family == AF_INET) {
1022 			lport = ((struct sockaddr_in *)to)->sin_port;
1023 			rport = ((struct sockaddr_in *)from)->sin_port;
1024 		} else {
1025 			return (NULL);
1026 		}
1027 		break;
1028 #endif
1029 #ifdef INET6
1030 	case AF_INET6:
1031 		if (from->sa_family == AF_INET6) {
1032 			lport = ((struct sockaddr_in6 *)to)->sin6_port;
1033 			rport = ((struct sockaddr_in6 *)from)->sin6_port;
1034 		} else {
1035 			return (NULL);
1036 		}
1037 		break;
1038 #endif
1039 	default:
1040 		return (NULL);
1041 	}
1042 	ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1043 	/*
1044 	 * Ok now for each of the guys in this bucket we must look and see:
1045 	 * - Does the remote port match. - Does there single association's
1046 	 * addresses match this address (to). If so we update p_ep to point
1047 	 * to this ep and return the tcb from it.
1048 	 */
1049 	LIST_FOREACH(inp, ephead, sctp_hash) {
1050 		SCTP_INP_RLOCK(inp);
1051 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1052 			SCTP_INP_RUNLOCK(inp);
1053 			continue;
1054 		}
1055 		if (lport != inp->sctp_lport) {
1056 			SCTP_INP_RUNLOCK(inp);
1057 			continue;
1058 		}
1059 		switch (to->sa_family) {
1060 #ifdef INET
1061 		case AF_INET:
1062 			{
1063 				struct sockaddr_in *sin;
1064 
1065 				sin = (struct sockaddr_in *)to;
1066 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1067 				    &sin->sin_addr) != 0) {
1068 					SCTP_INP_RUNLOCK(inp);
1069 					continue;
1070 				}
1071 				break;
1072 			}
1073 #endif
1074 #ifdef INET6
1075 		case AF_INET6:
1076 			{
1077 				struct sockaddr_in6 *sin6;
1078 
1079 				sin6 = (struct sockaddr_in6 *)to;
1080 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1081 				    &sin6->sin6_addr) != 0) {
1082 					SCTP_INP_RUNLOCK(inp);
1083 					continue;
1084 				}
1085 				break;
1086 			}
1087 #endif
1088 		default:
1089 			SCTP_INP_RUNLOCK(inp);
1090 			continue;
1091 		}
1092 		if (inp->def_vrf_id != vrf_id) {
1093 			SCTP_INP_RUNLOCK(inp);
1094 			continue;
1095 		}
1096 		/* check to see if the ep has one of the addresses */
1097 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1098 			/* We are NOT bound all, so look further */
1099 			int match = 0;
1100 
1101 			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1102 				if (laddr->ifa == NULL) {
1103 					SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1104 					continue;
1105 				}
1106 				if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1107 					SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1108 					continue;
1109 				}
1110 				if (laddr->ifa->address.sa.sa_family ==
1111 				    to->sa_family) {
1112 					/* see if it matches */
1113 #ifdef INET
1114 					if (from->sa_family == AF_INET) {
1115 						struct sockaddr_in *intf_addr,
1116 						           *sin;
1117 
1118 						intf_addr = &laddr->ifa->address.sin;
1119 						sin = (struct sockaddr_in *)to;
1120 						if (sin->sin_addr.s_addr ==
1121 						    intf_addr->sin_addr.s_addr) {
1122 							match = 1;
1123 							break;
1124 						}
1125 					}
1126 #endif
1127 #ifdef INET6
1128 					if (from->sa_family == AF_INET6) {
1129 						struct sockaddr_in6 *intf_addr6;
1130 						struct sockaddr_in6 *sin6;
1131 
1132 						sin6 = (struct sockaddr_in6 *)
1133 						    to;
1134 						intf_addr6 = &laddr->ifa->address.sin6;
1135 
1136 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1137 						    intf_addr6)) {
1138 							match = 1;
1139 							break;
1140 						}
1141 					}
1142 #endif
1143 				}
1144 			}
1145 			if (match == 0) {
1146 				/* This endpoint does not have this address */
1147 				SCTP_INP_RUNLOCK(inp);
1148 				continue;
1149 			}
1150 		}
1151 		/*
1152 		 * Ok if we hit here the ep has the address, does it hold
1153 		 * the tcb?
1154 		 */
1155 		/* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1156 		stcb = LIST_FIRST(&inp->sctp_asoc_list);
1157 		if (stcb == NULL) {
1158 			SCTP_INP_RUNLOCK(inp);
1159 			continue;
1160 		}
1161 		SCTP_TCB_LOCK(stcb);
1162 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1163 			SCTP_TCB_UNLOCK(stcb);
1164 			SCTP_INP_RUNLOCK(inp);
1165 			continue;
1166 		}
1167 		if (stcb->rport != rport) {
1168 			/* remote port does not match. */
1169 			SCTP_TCB_UNLOCK(stcb);
1170 			SCTP_INP_RUNLOCK(inp);
1171 			continue;
1172 		}
1173 		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1174 			SCTP_TCB_UNLOCK(stcb);
1175 			SCTP_INP_RUNLOCK(inp);
1176 			continue;
1177 		}
1178 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1179 			SCTP_TCB_UNLOCK(stcb);
1180 			SCTP_INP_RUNLOCK(inp);
1181 			continue;
1182 		}
1183 		/* Does this TCB have a matching address? */
1184 		TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1185 			if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1186 				/* not the same family, can't be a match */
1187 				continue;
1188 			}
1189 			switch (from->sa_family) {
1190 #ifdef INET
1191 			case AF_INET:
1192 				{
1193 					struct sockaddr_in *sin, *rsin;
1194 
1195 					sin = (struct sockaddr_in *)&net->ro._l_addr;
1196 					rsin = (struct sockaddr_in *)from;
1197 					if (sin->sin_addr.s_addr ==
1198 					    rsin->sin_addr.s_addr) {
1199 						/* found it */
1200 						if (netp != NULL) {
1201 							*netp = net;
1202 						}
1203 						/*
1204 						 * Update the endpoint
1205 						 * pointer
1206 						 */
1207 						*inp_p = inp;
1208 						SCTP_INP_RUNLOCK(inp);
1209 						return (stcb);
1210 					}
1211 					break;
1212 				}
1213 #endif
1214 #ifdef INET6
1215 			case AF_INET6:
1216 				{
1217 					struct sockaddr_in6 *sin6, *rsin6;
1218 
1219 					sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1220 					rsin6 = (struct sockaddr_in6 *)from;
1221 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1222 					    rsin6)) {
1223 						/* found it */
1224 						if (netp != NULL) {
1225 							*netp = net;
1226 						}
1227 						/*
1228 						 * Update the endpoint
1229 						 * pointer
1230 						 */
1231 						*inp_p = inp;
1232 						SCTP_INP_RUNLOCK(inp);
1233 						return (stcb);
1234 					}
1235 					break;
1236 				}
1237 #endif
1238 			default:
1239 				/* TSNH */
1240 				break;
1241 			}
1242 		}
1243 		SCTP_TCB_UNLOCK(stcb);
1244 		SCTP_INP_RUNLOCK(inp);
1245 	}
1246 	return (NULL);
1247 }
1248 
1249 /*
1250  * rules for use
1251  *
1252  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1253  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1254  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1255  * NULL.
1256  */
1257 
1258 struct sctp_tcb *
1259 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1260     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1261 {
1262 	struct sctpasochead *head;
1263 	struct sctp_inpcb *inp;
1264 	struct sctp_tcb *stcb = NULL;
1265 	struct sctp_nets *net;
1266 	uint16_t rport;
1267 
1268 	inp = *inp_p;
1269 	switch (remote->sa_family) {
1270 #ifdef INET
1271 	case AF_INET:
1272 		rport = (((struct sockaddr_in *)remote)->sin_port);
1273 		break;
1274 #endif
1275 #ifdef INET6
1276 	case AF_INET6:
1277 		rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1278 		break;
1279 #endif
1280 	default:
1281 		return (NULL);
1282 	}
1283 	if (locked_tcb) {
1284 		/*
1285 		 * UN-lock so we can do proper locking here this occurs when
1286 		 * called from load_addresses_from_init.
1287 		 */
1288 		atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1289 		SCTP_TCB_UNLOCK(locked_tcb);
1290 	}
1291 	SCTP_INP_INFO_RLOCK();
1292 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1293 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1294 		/*-
1295 		 * Now either this guy is our listener or it's the
1296 		 * connector. If it is the one that issued the connect, then
1297 		 * it's only chance is to be the first TCB in the list. If
1298 		 * it is the acceptor, then do the special_lookup to hash
1299 		 * and find the real inp.
1300 		 */
1301 		if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1302 			/* to is peer addr, from is my addr */
1303 			stcb = sctp_tcb_special_locate(inp_p, remote, local,
1304 			    netp, inp->def_vrf_id);
1305 			if ((stcb != NULL) && (locked_tcb == NULL)) {
1306 				/* we have a locked tcb, lower refcount */
1307 				SCTP_INP_DECR_REF(inp);
1308 			}
1309 			if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1310 				SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1311 				SCTP_TCB_LOCK(locked_tcb);
1312 				atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1313 				SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1314 			}
1315 			SCTP_INP_INFO_RUNLOCK();
1316 			return (stcb);
1317 		} else {
1318 			SCTP_INP_WLOCK(inp);
1319 			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1320 				goto null_return;
1321 			}
1322 			stcb = LIST_FIRST(&inp->sctp_asoc_list);
1323 			if (stcb == NULL) {
1324 				goto null_return;
1325 			}
1326 			SCTP_TCB_LOCK(stcb);
1327 
1328 			if (stcb->rport != rport) {
1329 				/* remote port does not match. */
1330 				SCTP_TCB_UNLOCK(stcb);
1331 				goto null_return;
1332 			}
1333 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334 				SCTP_TCB_UNLOCK(stcb);
1335 				goto null_return;
1336 			}
1337 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1338 				SCTP_TCB_UNLOCK(stcb);
1339 				goto null_return;
1340 			}
1341 			/* now look at the list of remote addresses */
1342 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1343 #ifdef INVARIANTS
1344 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1345 					panic("Corrupt net list");
1346 				}
1347 #endif
1348 				if (net->ro._l_addr.sa.sa_family !=
1349 				    remote->sa_family) {
1350 					/* not the same family */
1351 					continue;
1352 				}
1353 				switch (remote->sa_family) {
1354 #ifdef INET
1355 				case AF_INET:
1356 					{
1357 						struct sockaddr_in *sin,
1358 						           *rsin;
1359 
1360 						sin = (struct sockaddr_in *)
1361 						    &net->ro._l_addr;
1362 						rsin = (struct sockaddr_in *)remote;
1363 						if (sin->sin_addr.s_addr ==
1364 						    rsin->sin_addr.s_addr) {
1365 							/* found it */
1366 							if (netp != NULL) {
1367 								*netp = net;
1368 							}
1369 							if (locked_tcb == NULL) {
1370 								SCTP_INP_DECR_REF(inp);
1371 							} else if (locked_tcb != stcb) {
1372 								SCTP_TCB_LOCK(locked_tcb);
1373 							}
1374 							if (locked_tcb) {
1375 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1376 							}
1377 
1378 							SCTP_INP_WUNLOCK(inp);
1379 							SCTP_INP_INFO_RUNLOCK();
1380 							return (stcb);
1381 						}
1382 						break;
1383 					}
1384 #endif
1385 #ifdef INET6
1386 				case AF_INET6:
1387 					{
1388 						struct sockaddr_in6 *sin6,
1389 						            *rsin6;
1390 
1391 						sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1392 						rsin6 = (struct sockaddr_in6 *)remote;
1393 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1394 						    rsin6)) {
1395 							/* found it */
1396 							if (netp != NULL) {
1397 								*netp = net;
1398 							}
1399 							if (locked_tcb == NULL) {
1400 								SCTP_INP_DECR_REF(inp);
1401 							} else if (locked_tcb != stcb) {
1402 								SCTP_TCB_LOCK(locked_tcb);
1403 							}
1404 							if (locked_tcb) {
1405 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1406 							}
1407 							SCTP_INP_WUNLOCK(inp);
1408 							SCTP_INP_INFO_RUNLOCK();
1409 							return (stcb);
1410 						}
1411 						break;
1412 					}
1413 #endif
1414 				default:
1415 					/* TSNH */
1416 					break;
1417 				}
1418 			}
1419 			SCTP_TCB_UNLOCK(stcb);
1420 		}
1421 	} else {
1422 		SCTP_INP_WLOCK(inp);
1423 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1424 			goto null_return;
1425 		}
1426 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1427 		    inp->sctp_hashmark)];
1428 		LIST_FOREACH(stcb, head, sctp_tcbhash) {
1429 			if (stcb->rport != rport) {
1430 				/* remote port does not match */
1431 				continue;
1432 			}
1433 			SCTP_TCB_LOCK(stcb);
1434 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1435 				SCTP_TCB_UNLOCK(stcb);
1436 				continue;
1437 			}
1438 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1439 				SCTP_TCB_UNLOCK(stcb);
1440 				continue;
1441 			}
1442 			/* now look at the list of remote addresses */
1443 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1444 #ifdef INVARIANTS
1445 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1446 					panic("Corrupt net list");
1447 				}
1448 #endif
1449 				if (net->ro._l_addr.sa.sa_family !=
1450 				    remote->sa_family) {
1451 					/* not the same family */
1452 					continue;
1453 				}
1454 				switch (remote->sa_family) {
1455 #ifdef INET
1456 				case AF_INET:
1457 					{
1458 						struct sockaddr_in *sin,
1459 						           *rsin;
1460 
1461 						sin = (struct sockaddr_in *)
1462 						    &net->ro._l_addr;
1463 						rsin = (struct sockaddr_in *)remote;
1464 						if (sin->sin_addr.s_addr ==
1465 						    rsin->sin_addr.s_addr) {
1466 							/* found it */
1467 							if (netp != NULL) {
1468 								*netp = net;
1469 							}
1470 							if (locked_tcb == NULL) {
1471 								SCTP_INP_DECR_REF(inp);
1472 							} else if (locked_tcb != stcb) {
1473 								SCTP_TCB_LOCK(locked_tcb);
1474 							}
1475 							if (locked_tcb) {
1476 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1477 							}
1478 							SCTP_INP_WUNLOCK(inp);
1479 							SCTP_INP_INFO_RUNLOCK();
1480 							return (stcb);
1481 						}
1482 						break;
1483 					}
1484 #endif
1485 #ifdef INET6
1486 				case AF_INET6:
1487 					{
1488 						struct sockaddr_in6 *sin6,
1489 						            *rsin6;
1490 
1491 						sin6 = (struct sockaddr_in6 *)
1492 						    &net->ro._l_addr;
1493 						rsin6 = (struct sockaddr_in6 *)remote;
1494 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1495 						    rsin6)) {
1496 							/* found it */
1497 							if (netp != NULL) {
1498 								*netp = net;
1499 							}
1500 							if (locked_tcb == NULL) {
1501 								SCTP_INP_DECR_REF(inp);
1502 							} else if (locked_tcb != stcb) {
1503 								SCTP_TCB_LOCK(locked_tcb);
1504 							}
1505 							if (locked_tcb) {
1506 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1507 							}
1508 							SCTP_INP_WUNLOCK(inp);
1509 							SCTP_INP_INFO_RUNLOCK();
1510 							return (stcb);
1511 						}
1512 						break;
1513 					}
1514 #endif
1515 				default:
1516 					/* TSNH */
1517 					break;
1518 				}
1519 			}
1520 			SCTP_TCB_UNLOCK(stcb);
1521 		}
1522 	}
1523 null_return:
1524 	/* clean up for returning null */
1525 	if (locked_tcb) {
1526 		SCTP_TCB_LOCK(locked_tcb);
1527 		atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1528 	}
1529 	SCTP_INP_WUNLOCK(inp);
1530 	SCTP_INP_INFO_RUNLOCK();
1531 	/* not found */
1532 	return (NULL);
1533 }
1534 
1535 /*
1536  * Find an association for a specific endpoint using the association id given
1537  * out in the COMM_UP notification
1538  */
1539 struct sctp_tcb *
1540 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1541 {
1542 	/*
1543 	 * Use my the assoc_id to find a endpoint
1544 	 */
1545 	struct sctpasochead *head;
1546 	struct sctp_tcb *stcb;
1547 	uint32_t id;
1548 
1549 	if (inp == NULL) {
1550 		SCTP_PRINTF("TSNH ep_associd\n");
1551 		return (NULL);
1552 	}
1553 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1554 		SCTP_PRINTF("TSNH ep_associd0\n");
1555 		return (NULL);
1556 	}
1557 	id = (uint32_t)asoc_id;
1558 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1559 	if (head == NULL) {
1560 		/* invalid id TSNH */
1561 		SCTP_PRINTF("TSNH ep_associd1\n");
1562 		return (NULL);
1563 	}
1564 	LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1565 		if (stcb->asoc.assoc_id == id) {
1566 			if (inp != stcb->sctp_ep) {
1567 				/*
1568 				 * some other guy has the same id active (id
1569 				 * collision ??).
1570 				 */
1571 				SCTP_PRINTF("TSNH ep_associd2\n");
1572 				continue;
1573 			}
1574 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1575 				continue;
1576 			}
1577 			if (want_lock) {
1578 				SCTP_TCB_LOCK(stcb);
1579 			}
1580 			return (stcb);
1581 		}
1582 	}
1583 	return (NULL);
1584 }
1585 
1586 struct sctp_tcb *
1587 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1588 {
1589 	struct sctp_tcb *stcb;
1590 
1591 	SCTP_INP_RLOCK(inp);
1592 	stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1593 	SCTP_INP_RUNLOCK(inp);
1594 	return (stcb);
1595 }
1596 
1597 /*
1598  * Endpoint probe expects that the INP_INFO is locked.
1599  */
1600 static struct sctp_inpcb *
1601 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1602     uint16_t lport, uint32_t vrf_id)
1603 {
1604 	struct sctp_inpcb *inp;
1605 	struct sctp_laddr *laddr;
1606 #ifdef INET
1607 	struct sockaddr_in *sin;
1608 #endif
1609 #ifdef INET6
1610 	struct sockaddr_in6 *sin6;
1611 	struct sockaddr_in6 *intf_addr6;
1612 #endif
1613 	int fnd;
1614 
1615 #ifdef INET
1616 	sin = NULL;
1617 #endif
1618 #ifdef INET6
1619 	sin6 = NULL;
1620 #endif
1621 	switch (nam->sa_family) {
1622 #ifdef INET
1623 	case AF_INET:
1624 		sin = (struct sockaddr_in *)nam;
1625 		break;
1626 #endif
1627 #ifdef INET6
1628 	case AF_INET6:
1629 		sin6 = (struct sockaddr_in6 *)nam;
1630 		break;
1631 #endif
1632 	default:
1633 		/* unsupported family */
1634 		return (NULL);
1635 	}
1636 
1637 	if (head == NULL)
1638 		return (NULL);
1639 
1640 	LIST_FOREACH(inp, head, sctp_hash) {
1641 		SCTP_INP_RLOCK(inp);
1642 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1643 			SCTP_INP_RUNLOCK(inp);
1644 			continue;
1645 		}
1646 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1647 		    (inp->sctp_lport == lport)) {
1648 			/* got it */
1649 			switch (nam->sa_family) {
1650 #ifdef INET
1651 			case AF_INET:
1652 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1653 				    SCTP_IPV6_V6ONLY(inp)) {
1654 					/*
1655 					 * IPv4 on a IPv6 socket with ONLY
1656 					 * IPv6 set
1657 					 */
1658 					SCTP_INP_RUNLOCK(inp);
1659 					continue;
1660 				}
1661 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1662 				    &sin->sin_addr) != 0) {
1663 					SCTP_INP_RUNLOCK(inp);
1664 					continue;
1665 				}
1666 				break;
1667 #endif
1668 #ifdef INET6
1669 			case AF_INET6:
1670 				/*
1671 				 * A V6 address and the endpoint is NOT
1672 				 * bound V6
1673 				 */
1674 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1675 					SCTP_INP_RUNLOCK(inp);
1676 					continue;
1677 				}
1678 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1679 				    &sin6->sin6_addr) != 0) {
1680 					SCTP_INP_RUNLOCK(inp);
1681 					continue;
1682 				}
1683 				break;
1684 #endif
1685 			default:
1686 				break;
1687 			}
1688 			/* does a VRF id match? */
1689 			fnd = 0;
1690 			if (inp->def_vrf_id == vrf_id)
1691 				fnd = 1;
1692 
1693 			SCTP_INP_RUNLOCK(inp);
1694 			if (!fnd)
1695 				continue;
1696 			return (inp);
1697 		}
1698 		SCTP_INP_RUNLOCK(inp);
1699 	}
1700 	switch (nam->sa_family) {
1701 #ifdef INET
1702 	case AF_INET:
1703 		if (sin->sin_addr.s_addr == INADDR_ANY) {
1704 			/* Can't hunt for one that has no address specified */
1705 			return (NULL);
1706 		}
1707 		break;
1708 #endif
1709 #ifdef INET6
1710 	case AF_INET6:
1711 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1712 			/* Can't hunt for one that has no address specified */
1713 			return (NULL);
1714 		}
1715 		break;
1716 #endif
1717 	default:
1718 		break;
1719 	}
1720 	/*
1721 	 * ok, not bound to all so see if we can find a EP bound to this
1722 	 * address.
1723 	 */
1724 	LIST_FOREACH(inp, head, sctp_hash) {
1725 		SCTP_INP_RLOCK(inp);
1726 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1727 			SCTP_INP_RUNLOCK(inp);
1728 			continue;
1729 		}
1730 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1731 			SCTP_INP_RUNLOCK(inp);
1732 			continue;
1733 		}
1734 		/*
1735 		 * Ok this could be a likely candidate, look at all of its
1736 		 * addresses
1737 		 */
1738 		if (inp->sctp_lport != lport) {
1739 			SCTP_INP_RUNLOCK(inp);
1740 			continue;
1741 		}
1742 		/* does a VRF id match? */
1743 		fnd = 0;
1744 		if (inp->def_vrf_id == vrf_id)
1745 			fnd = 1;
1746 
1747 		if (!fnd) {
1748 			SCTP_INP_RUNLOCK(inp);
1749 			continue;
1750 		}
1751 		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1752 			if (laddr->ifa == NULL) {
1753 				SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1754 				    __func__);
1755 				continue;
1756 			}
1757 			SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1758 			    (void *)laddr->ifa);
1759 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1760 				SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1761 				continue;
1762 			}
1763 			if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1764 				/* possible, see if it matches */
1765 				switch (nam->sa_family) {
1766 #ifdef INET
1767 				case AF_INET:
1768 					if (sin->sin_addr.s_addr ==
1769 					    laddr->ifa->address.sin.sin_addr.s_addr) {
1770 						SCTP_INP_RUNLOCK(inp);
1771 						return (inp);
1772 					}
1773 					break;
1774 #endif
1775 #ifdef INET6
1776 				case AF_INET6:
1777 					intf_addr6 = &laddr->ifa->address.sin6;
1778 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1779 					    intf_addr6)) {
1780 						SCTP_INP_RUNLOCK(inp);
1781 						return (inp);
1782 					}
1783 					break;
1784 #endif
1785 				}
1786 			}
1787 		}
1788 		SCTP_INP_RUNLOCK(inp);
1789 	}
1790 	return (NULL);
1791 }
1792 
1793 static struct sctp_inpcb *
1794 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1795 {
1796 	struct sctppcbhead *head;
1797 	struct sctp_inpcb *t_inp;
1798 	int fnd;
1799 
1800 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1801 	    SCTP_BASE_INFO(hashmark))];
1802 	LIST_FOREACH(t_inp, head, sctp_hash) {
1803 		if (t_inp->sctp_lport != lport) {
1804 			continue;
1805 		}
1806 		/* is it in the VRF in question */
1807 		fnd = 0;
1808 		if (t_inp->def_vrf_id == vrf_id)
1809 			fnd = 1;
1810 		if (!fnd)
1811 			continue;
1812 
1813 		/* This one is in use. */
1814 		/* check the v6/v4 binding issue */
1815 		if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1816 		    SCTP_IPV6_V6ONLY(t_inp)) {
1817 			if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1818 				/* collision in V6 space */
1819 				return (t_inp);
1820 			} else {
1821 				/* inp is BOUND_V4 no conflict */
1822 				continue;
1823 			}
1824 		} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1825 			/* t_inp is bound v4 and v6, conflict always */
1826 			return (t_inp);
1827 		} else {
1828 			/* t_inp is bound only V4 */
1829 			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1830 			    SCTP_IPV6_V6ONLY(inp)) {
1831 				/* no conflict */
1832 				continue;
1833 			}
1834 			/* else fall through to conflict */
1835 		}
1836 		return (t_inp);
1837 	}
1838 	return (NULL);
1839 }
1840 
1841 int
1842 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1843 {
1844 	/* For 1-2-1 with port reuse */
1845 	struct sctppcbhead *head;
1846 	struct sctp_inpcb *tinp, *ninp;
1847 
1848 	if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1849 		/* only works with port reuse on */
1850 		return (-1);
1851 	}
1852 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1853 		return (0);
1854 	}
1855 	SCTP_INP_RUNLOCK(inp);
1856 	SCTP_INP_INFO_WLOCK();
1857 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1858 	    SCTP_BASE_INFO(hashmark))];
1859 	/* Kick out all non-listeners to the TCP hash */
1860 	LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1861 		if (tinp->sctp_lport != inp->sctp_lport) {
1862 			continue;
1863 		}
1864 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1865 			continue;
1866 		}
1867 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1868 			continue;
1869 		}
1870 		if (SCTP_IS_LISTENING(tinp)) {
1871 			continue;
1872 		}
1873 		SCTP_INP_WLOCK(tinp);
1874 		LIST_REMOVE(tinp, sctp_hash);
1875 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1876 		tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1877 		LIST_INSERT_HEAD(head, tinp, sctp_hash);
1878 		SCTP_INP_WUNLOCK(tinp);
1879 	}
1880 	SCTP_INP_WLOCK(inp);
1881 	/* Pull from where he was */
1882 	LIST_REMOVE(inp, sctp_hash);
1883 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1884 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1885 	LIST_INSERT_HEAD(head, inp, sctp_hash);
1886 	SCTP_INP_WUNLOCK(inp);
1887 	SCTP_INP_RLOCK(inp);
1888 	SCTP_INP_INFO_WUNLOCK();
1889 	return (0);
1890 }
1891 
1892 struct sctp_inpcb *
1893 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1894     uint32_t vrf_id)
1895 {
1896 	/*
1897 	 * First we check the hash table to see if someone has this port
1898 	 * bound with just the port.
1899 	 */
1900 	struct sctp_inpcb *inp;
1901 	struct sctppcbhead *head;
1902 	int lport;
1903 	unsigned int i;
1904 #ifdef INET
1905 	struct sockaddr_in *sin;
1906 #endif
1907 #ifdef INET6
1908 	struct sockaddr_in6 *sin6;
1909 #endif
1910 
1911 	switch (nam->sa_family) {
1912 #ifdef INET
1913 	case AF_INET:
1914 		sin = (struct sockaddr_in *)nam;
1915 		lport = sin->sin_port;
1916 		break;
1917 #endif
1918 #ifdef INET6
1919 	case AF_INET6:
1920 		sin6 = (struct sockaddr_in6 *)nam;
1921 		lport = sin6->sin6_port;
1922 		break;
1923 #endif
1924 	default:
1925 		return (NULL);
1926 	}
1927 	/*
1928 	 * I could cheat here and just cast to one of the types but we will
1929 	 * do it right. It also provides the check against an Unsupported
1930 	 * type too.
1931 	 */
1932 	/* Find the head of the ALLADDR chain */
1933 	if (have_lock == 0) {
1934 		SCTP_INP_INFO_RLOCK();
1935 	}
1936 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1937 	    SCTP_BASE_INFO(hashmark))];
1938 	inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1939 
1940 	/*
1941 	 * If the TCP model exists it could be that the main listening
1942 	 * endpoint is gone but there still exists a connected socket for
1943 	 * this guy. If so we can return the first one that we find. This
1944 	 * may NOT be the correct one so the caller should be wary on the
1945 	 * returned INP. Currently the only caller that sets find_tcp_pool
1946 	 * is in bindx where we are verifying that a user CAN bind the
1947 	 * address. He either has bound it already, or someone else has, or
1948 	 * its open to bind, so this is good enough.
1949 	 */
1950 	if (inp == NULL && find_tcp_pool) {
1951 		for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1952 			head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1953 			inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1954 			if (inp) {
1955 				break;
1956 			}
1957 		}
1958 	}
1959 	if (inp) {
1960 		SCTP_INP_INCR_REF(inp);
1961 	}
1962 	if (have_lock == 0) {
1963 		SCTP_INP_INFO_RUNLOCK();
1964 	}
1965 	return (inp);
1966 }
1967 
1968 /*
1969  * Find an association for an endpoint with the pointer to whom you want to
1970  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1971  * need to change the *to to some other struct like a mbuf...
1972  */
1973 struct sctp_tcb *
1974 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1975     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1976     uint32_t vrf_id)
1977 {
1978 	struct sctp_inpcb *inp = NULL;
1979 	struct sctp_tcb *stcb;
1980 
1981 	SCTP_INP_INFO_RLOCK();
1982 	if (find_tcp_pool) {
1983 		if (inp_p != NULL) {
1984 			stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1985 			    vrf_id);
1986 		} else {
1987 			stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1988 			    vrf_id);
1989 		}
1990 		if (stcb != NULL) {
1991 			SCTP_INP_INFO_RUNLOCK();
1992 			return (stcb);
1993 		}
1994 	}
1995 	inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1996 	if (inp_p != NULL) {
1997 		*inp_p = inp;
1998 	}
1999 	SCTP_INP_INFO_RUNLOCK();
2000 	if (inp == NULL) {
2001 		return (NULL);
2002 	}
2003 	/*
2004 	 * ok, we have an endpoint, now lets find the assoc for it (if any)
2005 	 * we now place the source address or from in the to of the find
2006 	 * endpoint call. Since in reality this chain is used from the
2007 	 * inbound packet side.
2008 	 */
2009 	if (inp_p != NULL) {
2010 		stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2011 		    NULL);
2012 	} else {
2013 		stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2014 		    NULL);
2015 	}
2016 	return (stcb);
2017 }
2018 
2019 /*
2020  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2021  * find all addresses that the sender has specified in any address list. Each
2022  * address will be used to lookup the TCB and see if one exits.
2023  */
2024 static struct sctp_tcb *
2025 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2026     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2027     struct sockaddr *dst)
2028 {
2029 	struct sctp_paramhdr *phdr, param_buf;
2030 #if defined(INET) || defined(INET6)
2031 	struct sctp_tcb *stcb;
2032 	uint16_t ptype;
2033 #endif
2034 	uint16_t plen;
2035 #ifdef INET
2036 	struct sockaddr_in sin4;
2037 #endif
2038 #ifdef INET6
2039 	struct sockaddr_in6 sin6;
2040 #endif
2041 
2042 #ifdef INET
2043 	memset(&sin4, 0, sizeof(sin4));
2044 	sin4.sin_len = sizeof(sin4);
2045 	sin4.sin_family = AF_INET;
2046 	sin4.sin_port = sh->src_port;
2047 #endif
2048 #ifdef INET6
2049 	memset(&sin6, 0, sizeof(sin6));
2050 	sin6.sin6_len = sizeof(sin6);
2051 	sin6.sin6_family = AF_INET6;
2052 	sin6.sin6_port = sh->src_port;
2053 #endif
2054 
2055 	offset += sizeof(struct sctp_init_chunk);
2056 
2057 	phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2058 	while (phdr != NULL) {
2059 		/* now we must see if we want the parameter */
2060 #if defined(INET) || defined(INET6)
2061 		ptype = ntohs(phdr->param_type);
2062 #endif
2063 		plen = ntohs(phdr->param_length);
2064 		if (plen == 0) {
2065 			break;
2066 		}
2067 #ifdef INET
2068 		if (ptype == SCTP_IPV4_ADDRESS &&
2069 		    plen == sizeof(struct sctp_ipv4addr_param)) {
2070 			/* Get the rest of the address */
2071 			struct sctp_ipv4addr_param ip4_param, *p4;
2072 
2073 			phdr = sctp_get_next_param(m, offset,
2074 			    (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2075 			if (phdr == NULL) {
2076 				return (NULL);
2077 			}
2078 			p4 = (struct sctp_ipv4addr_param *)phdr;
2079 			memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2080 			/* look it up */
2081 			stcb = sctp_findassociation_ep_addr(inp_p,
2082 			    (struct sockaddr *)&sin4, netp, dst, NULL);
2083 			if (stcb != NULL) {
2084 				return (stcb);
2085 			}
2086 		}
2087 #endif
2088 #ifdef INET6
2089 		if (ptype == SCTP_IPV6_ADDRESS &&
2090 		    plen == sizeof(struct sctp_ipv6addr_param)) {
2091 			/* Get the rest of the address */
2092 			struct sctp_ipv6addr_param ip6_param, *p6;
2093 
2094 			phdr = sctp_get_next_param(m, offset,
2095 			    (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2096 			if (phdr == NULL) {
2097 				return (NULL);
2098 			}
2099 			p6 = (struct sctp_ipv6addr_param *)phdr;
2100 			memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2101 			/* look it up */
2102 			stcb = sctp_findassociation_ep_addr(inp_p,
2103 			    (struct sockaddr *)&sin6, netp, dst, NULL);
2104 			if (stcb != NULL) {
2105 				return (stcb);
2106 			}
2107 		}
2108 #endif
2109 		offset += SCTP_SIZE32(plen);
2110 		phdr = sctp_get_next_param(m, offset, &param_buf,
2111 		    sizeof(param_buf));
2112 	}
2113 	return (NULL);
2114 }
2115 
2116 static struct sctp_tcb *
2117 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2118     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2119     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2120 {
2121 	/*
2122 	 * Use my vtag to hash. If we find it we then verify the source addr
2123 	 * is in the assoc. If all goes well we save a bit on rec of a
2124 	 * packet.
2125 	 */
2126 	struct sctpasochead *head;
2127 	struct sctp_nets *net;
2128 	struct sctp_tcb *stcb;
2129 
2130 	SCTP_INP_INFO_RLOCK();
2131 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2132 	    SCTP_BASE_INFO(hashasocmark))];
2133 	LIST_FOREACH(stcb, head, sctp_asocs) {
2134 		SCTP_INP_RLOCK(stcb->sctp_ep);
2135 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2136 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2137 			continue;
2138 		}
2139 		if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2140 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2141 			continue;
2142 		}
2143 		SCTP_TCB_LOCK(stcb);
2144 		SCTP_INP_RUNLOCK(stcb->sctp_ep);
2145 		if (stcb->asoc.my_vtag == vtag) {
2146 			/* candidate */
2147 			if (stcb->rport != rport) {
2148 				SCTP_TCB_UNLOCK(stcb);
2149 				continue;
2150 			}
2151 			if (stcb->sctp_ep->sctp_lport != lport) {
2152 				SCTP_TCB_UNLOCK(stcb);
2153 				continue;
2154 			}
2155 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2156 				SCTP_TCB_UNLOCK(stcb);
2157 				continue;
2158 			}
2159 			/* RRS:Need toaddr check here */
2160 			if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2161 				/* Endpoint does not own this address */
2162 				SCTP_TCB_UNLOCK(stcb);
2163 				continue;
2164 			}
2165 			if (remote_tag) {
2166 				/*
2167 				 * If we have both vtags that's all we match
2168 				 * on
2169 				 */
2170 				if (stcb->asoc.peer_vtag == remote_tag) {
2171 					/*
2172 					 * If both tags match we consider it
2173 					 * conclusive and check NO
2174 					 * source/destination addresses
2175 					 */
2176 					goto conclusive;
2177 				}
2178 			}
2179 			if (skip_src_check) {
2180 		conclusive:
2181 				if (from) {
2182 					*netp = sctp_findnet(stcb, from);
2183 				} else {
2184 					*netp = NULL;	/* unknown */
2185 				}
2186 				if (inp_p)
2187 					*inp_p = stcb->sctp_ep;
2188 				SCTP_INP_INFO_RUNLOCK();
2189 				return (stcb);
2190 			}
2191 			net = sctp_findnet(stcb, from);
2192 			if (net) {
2193 				/* yep its him. */
2194 				*netp = net;
2195 				SCTP_STAT_INCR(sctps_vtagexpress);
2196 				*inp_p = stcb->sctp_ep;
2197 				SCTP_INP_INFO_RUNLOCK();
2198 				return (stcb);
2199 			} else {
2200 				/*
2201 				 * not him, this should only happen in rare
2202 				 * cases so I peg it.
2203 				 */
2204 				SCTP_STAT_INCR(sctps_vtagbogus);
2205 			}
2206 		}
2207 		SCTP_TCB_UNLOCK(stcb);
2208 	}
2209 	SCTP_INP_INFO_RUNLOCK();
2210 	return (NULL);
2211 }
2212 
2213 /*
2214  * Find an association with the pointer to the inbound IP packet. This can be
2215  * a IPv4 or IPv6 packet.
2216  */
2217 struct sctp_tcb *
2218 sctp_findassociation_addr(struct mbuf *m, int offset,
2219     struct sockaddr *src, struct sockaddr *dst,
2220     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2221     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2222 {
2223 	struct sctp_tcb *stcb;
2224 	struct sctp_inpcb *inp;
2225 
2226 	if (sh->v_tag) {
2227 		/* we only go down this path if vtag is non-zero */
2228 		stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2229 		    inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2230 		if (stcb) {
2231 			return (stcb);
2232 		}
2233 	}
2234 
2235 	if (inp_p) {
2236 		stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2237 		    1, vrf_id);
2238 		inp = *inp_p;
2239 	} else {
2240 		stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2241 		    1, vrf_id);
2242 	}
2243 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2244 	if (stcb == NULL && inp) {
2245 		/* Found a EP but not this address */
2246 		if ((ch->chunk_type == SCTP_INITIATION) ||
2247 		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
2248 			/*-
2249 			 * special hook, we do NOT return linp or an
2250 			 * association that is linked to an existing
2251 			 * association that is under the TCP pool (i.e. no
2252 			 * listener exists). The endpoint finding routine
2253 			 * will always find a listener before examining the
2254 			 * TCP pool.
2255 			 */
2256 			if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2257 				if (inp_p) {
2258 					*inp_p = NULL;
2259 				}
2260 				return (NULL);
2261 			}
2262 			stcb = sctp_findassociation_special_addr(m,
2263 			    offset, sh, &inp, netp, dst);
2264 			if (inp_p != NULL) {
2265 				*inp_p = inp;
2266 			}
2267 		}
2268 	}
2269 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2270 	return (stcb);
2271 }
2272 
2273 /*
2274  * lookup an association by an ASCONF lookup address.
2275  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2276  */
2277 struct sctp_tcb *
2278 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2279     struct sockaddr *dst, struct sctphdr *sh,
2280     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2281 {
2282 	struct sctp_tcb *stcb;
2283 	union sctp_sockstore remote_store;
2284 	struct sctp_paramhdr param_buf, *phdr;
2285 	int ptype;
2286 	int zero_address = 0;
2287 #ifdef INET
2288 	struct sockaddr_in *sin;
2289 #endif
2290 #ifdef INET6
2291 	struct sockaddr_in6 *sin6;
2292 #endif
2293 
2294 	memset(&remote_store, 0, sizeof(remote_store));
2295 	phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2296 	    &param_buf, sizeof(struct sctp_paramhdr));
2297 	if (phdr == NULL) {
2298 		SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2299 		    __func__);
2300 		return NULL;
2301 	}
2302 	ptype = (int)((uint32_t)ntohs(phdr->param_type));
2303 	/* get the correlation address */
2304 	switch (ptype) {
2305 #ifdef INET6
2306 	case SCTP_IPV6_ADDRESS:
2307 		{
2308 			/* ipv6 address param */
2309 			struct sctp_ipv6addr_param *p6, p6_buf;
2310 
2311 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2312 				return NULL;
2313 			}
2314 			p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2315 			    offset + sizeof(struct sctp_asconf_chunk),
2316 			    &p6_buf.ph, sizeof(p6_buf));
2317 			if (p6 == NULL) {
2318 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2319 				    __func__);
2320 				return (NULL);
2321 			}
2322 			sin6 = &remote_store.sin6;
2323 			sin6->sin6_family = AF_INET6;
2324 			sin6->sin6_len = sizeof(*sin6);
2325 			sin6->sin6_port = sh->src_port;
2326 			memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2327 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2328 				zero_address = 1;
2329 			break;
2330 		}
2331 #endif
2332 #ifdef INET
2333 	case SCTP_IPV4_ADDRESS:
2334 		{
2335 			/* ipv4 address param */
2336 			struct sctp_ipv4addr_param *p4, p4_buf;
2337 
2338 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2339 				return NULL;
2340 			}
2341 			p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2342 			    offset + sizeof(struct sctp_asconf_chunk),
2343 			    &p4_buf.ph, sizeof(p4_buf));
2344 			if (p4 == NULL) {
2345 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2346 				    __func__);
2347 				return (NULL);
2348 			}
2349 			sin = &remote_store.sin;
2350 			sin->sin_family = AF_INET;
2351 			sin->sin_len = sizeof(*sin);
2352 			sin->sin_port = sh->src_port;
2353 			memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2354 			if (sin->sin_addr.s_addr == INADDR_ANY)
2355 				zero_address = 1;
2356 			break;
2357 		}
2358 #endif
2359 	default:
2360 		/* invalid address param type */
2361 		return NULL;
2362 	}
2363 
2364 	if (zero_address) {
2365 		stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2366 		    netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2367 		if (stcb != NULL) {
2368 			SCTP_INP_DECR_REF(*inp_p);
2369 		}
2370 	} else {
2371 		stcb = sctp_findassociation_ep_addr(inp_p,
2372 		    &remote_store.sa, netp,
2373 		    dst, NULL);
2374 	}
2375 	return (stcb);
2376 }
2377 
2378 /*
2379  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2380  * addresses. This way if we don't get a bind we by default pick a ephemeral
2381  * port with all addresses bound.
2382  */
2383 int
2384 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2385 {
2386 	/*
2387 	 * we get called when a new endpoint starts up. We need to allocate
2388 	 * the sctp_inpcb structure from the zone and init it. Mark it as
2389 	 * unbound and find a port that we can use as an ephemeral with
2390 	 * INADDR_ANY. If the user binds later no problem we can then add in
2391 	 * the specific addresses. And setup the default parameters for the
2392 	 * EP.
2393 	 */
2394 	int i, error;
2395 	struct sctp_inpcb *inp;
2396 	struct sctp_pcb *m;
2397 	struct timeval time;
2398 	sctp_sharedkey_t *null_key;
2399 
2400 	error = 0;
2401 
2402 	SCTP_INP_INFO_WLOCK();
2403 	inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2404 	if (inp == NULL) {
2405 		SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2406 		SCTP_INP_INFO_WUNLOCK();
2407 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2408 		return (ENOBUFS);
2409 	}
2410 	/* zap it */
2411 	memset(inp, 0, sizeof(*inp));
2412 
2413 	/* bump generations */
2414 	/* setup socket pointers */
2415 	inp->sctp_socket = so;
2416 	inp->ip_inp.inp.inp_socket = so;
2417 	inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2418 #ifdef INET6
2419 	if (INP_SOCKAF(so) == AF_INET6) {
2420 		if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2421 			inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2422 		}
2423 		if (MODULE_GLOBAL(ip6_v6only)) {
2424 			inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2425 		}
2426 	}
2427 #endif
2428 	inp->sctp_associd_counter = 1;
2429 	inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2430 	inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2431 	inp->max_cwnd = 0;
2432 	inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2433 	inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2434 	inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2435 	inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2436 	inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2437 	inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2438 	inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2439 	inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2440 	inp->idata_supported = 0;
2441 
2442 	inp->fibnum = so->so_fibnum;
2443 	/* init the small hash table we use to track asocid <-> tcb */
2444 	inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2445 	if (inp->sctp_asocidhash == NULL) {
2446 		crfree(inp->ip_inp.inp.inp_cred);
2447 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2448 		SCTP_INP_INFO_WUNLOCK();
2449 		return (ENOBUFS);
2450 	}
2451 	SCTP_INCR_EP_COUNT();
2452 	inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2453 	SCTP_INP_INFO_WUNLOCK();
2454 
2455 	so->so_pcb = (caddr_t)inp;
2456 
2457 	if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2458 		/* UDP style socket */
2459 		inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2460 		    SCTP_PCB_FLAGS_UNBOUND);
2461 		/* Be sure it is NON-BLOCKING IO for UDP */
2462 		/* SCTP_SET_SO_NBIO(so); */
2463 	} else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2464 		/* TCP style socket */
2465 		inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2466 		    SCTP_PCB_FLAGS_UNBOUND);
2467 		/* Be sure we have blocking IO by default */
2468 		SOCK_LOCK(so);
2469 		SCTP_CLEAR_SO_NBIO(so);
2470 		SOCK_UNLOCK(so);
2471 	} else {
2472 		/*
2473 		 * unsupported socket type (RAW, etc)- in case we missed it
2474 		 * in protosw
2475 		 */
2476 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2477 		so->so_pcb = NULL;
2478 		crfree(inp->ip_inp.inp.inp_cred);
2479 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2480 		return (EOPNOTSUPP);
2481 	}
2482 	if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2483 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2484 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2485 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2486 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2487 		sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2488 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2489 		sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2490 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2491 	}
2492 	inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2493 	    &inp->sctp_hashmark);
2494 	if (inp->sctp_tcbhash == NULL) {
2495 		SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2496 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2497 		so->so_pcb = NULL;
2498 		crfree(inp->ip_inp.inp.inp_cred);
2499 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2500 		return (ENOBUFS);
2501 	}
2502 	inp->def_vrf_id = vrf_id;
2503 
2504 	SCTP_INP_INFO_WLOCK();
2505 	SCTP_INP_LOCK_INIT(inp);
2506 	INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2507 	SCTP_INP_READ_INIT(inp);
2508 	SCTP_ASOC_CREATE_LOCK_INIT(inp);
2509 	/* lock the new ep */
2510 	SCTP_INP_WLOCK(inp);
2511 
2512 	/* add it to the info area */
2513 	LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2514 	SCTP_INP_INFO_WUNLOCK();
2515 
2516 	TAILQ_INIT(&inp->read_queue);
2517 	LIST_INIT(&inp->sctp_addr_list);
2518 
2519 	LIST_INIT(&inp->sctp_asoc_list);
2520 
2521 #ifdef SCTP_TRACK_FREED_ASOCS
2522 	/* TEMP CODE */
2523 	LIST_INIT(&inp->sctp_asoc_free_list);
2524 #endif
2525 	/* Init the timer structure for signature change */
2526 	SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2527 	inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2528 
2529 	/* now init the actual endpoint default data */
2530 	m = &inp->sctp_ep;
2531 
2532 	/* setup the base timeout information */
2533 	m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);	/* needed ? */
2534 	m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);	/* needed ? */
2535 	m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2536 	m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2537 	m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2538 	m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2539 	m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2540 	/* all max/min max are in ms */
2541 	m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2542 	m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2543 	m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2544 	m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2545 	m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2546 	m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2547 	m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2548 	m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2549 	m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2550 	m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2551 	m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2552 	m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2553 	m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2554 
2555 	m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2556 	m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2557 	m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2558 	/* number of streams to pre-open on a association */
2559 	m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2560 
2561 	m->default_mtu = 0;
2562 	/* Add adaptation cookie */
2563 	m->adaptation_layer_indicator = 0;
2564 	m->adaptation_layer_indicator_provided = 0;
2565 
2566 	/* seed random number generator */
2567 	m->random_counter = 1;
2568 	m->store_at = SCTP_SIGNATURE_SIZE;
2569 	SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2570 	sctp_fill_random_store(m);
2571 
2572 	/* Minimum cookie size */
2573 	m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2574 	    sizeof(struct sctp_state_cookie);
2575 	m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2576 
2577 	/* Setup the initial secret */
2578 	(void)SCTP_GETTIME_TIMEVAL(&time);
2579 	m->time_of_secret_change = time.tv_sec;
2580 
2581 	for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2582 		m->secret_key[0][i] = sctp_select_initial_TSN(m);
2583 	}
2584 	sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2585 
2586 	/* How long is a cookie good for ? */
2587 	m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2588 	/*
2589 	 * Initialize authentication parameters
2590 	 */
2591 	m->local_hmacs = sctp_default_supported_hmaclist();
2592 	m->local_auth_chunks = sctp_alloc_chunklist();
2593 	if (inp->asconf_supported) {
2594 		sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2595 		sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2596 	}
2597 	m->default_dscp = 0;
2598 #ifdef INET6
2599 	m->default_flowlabel = 0;
2600 #endif
2601 	m->port = 0;		/* encapsulation disabled by default */
2602 	LIST_INIT(&m->shared_keys);
2603 	/* add default NULL key as key id 0 */
2604 	null_key = sctp_alloc_sharedkey();
2605 	sctp_insert_sharedkey(&m->shared_keys, null_key);
2606 	SCTP_INP_WUNLOCK(inp);
2607 #ifdef SCTP_LOG_CLOSING
2608 	sctp_log_closing(inp, NULL, 12);
2609 #endif
2610 	return (error);
2611 }
2612 
2613 void
2614 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2615     struct sctp_tcb *stcb)
2616 {
2617 	struct sctp_nets *net;
2618 	uint16_t lport, rport;
2619 	struct sctppcbhead *head;
2620 	struct sctp_laddr *laddr, *oladdr;
2621 
2622 	atomic_add_int(&stcb->asoc.refcnt, 1);
2623 	SCTP_TCB_UNLOCK(stcb);
2624 	SCTP_INP_INFO_WLOCK();
2625 	SCTP_INP_WLOCK(old_inp);
2626 	SCTP_INP_WLOCK(new_inp);
2627 	SCTP_TCB_LOCK(stcb);
2628 	atomic_subtract_int(&stcb->asoc.refcnt, 1);
2629 
2630 	new_inp->sctp_ep.time_of_secret_change =
2631 	    old_inp->sctp_ep.time_of_secret_change;
2632 	memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2633 	    sizeof(old_inp->sctp_ep.secret_key));
2634 	new_inp->sctp_ep.current_secret_number =
2635 	    old_inp->sctp_ep.current_secret_number;
2636 	new_inp->sctp_ep.last_secret_number =
2637 	    old_inp->sctp_ep.last_secret_number;
2638 	new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2639 
2640 	/* make it so new data pours into the new socket */
2641 	stcb->sctp_socket = new_inp->sctp_socket;
2642 	stcb->sctp_ep = new_inp;
2643 
2644 	/* Copy the port across */
2645 	lport = new_inp->sctp_lport = old_inp->sctp_lport;
2646 	rport = stcb->rport;
2647 	/* Pull the tcb from the old association */
2648 	LIST_REMOVE(stcb, sctp_tcbhash);
2649 	LIST_REMOVE(stcb, sctp_tcblist);
2650 	if (stcb->asoc.in_asocid_hash) {
2651 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
2652 	}
2653 	/* Now insert the new_inp into the TCP connected hash */
2654 	head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2655 
2656 	LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2657 	/* Its safe to access */
2658 	new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2659 
2660 	/* Now move the tcb into the endpoint list */
2661 	LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2662 	/*
2663 	 * Question, do we even need to worry about the ep-hash since we
2664 	 * only have one connection? Probably not :> so lets get rid of it
2665 	 * and not suck up any kernel memory in that.
2666 	 */
2667 	if (stcb->asoc.in_asocid_hash) {
2668 		struct sctpasochead *lhd;
2669 
2670 		lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2671 		    new_inp->hashasocidmark)];
2672 		LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2673 	}
2674 	/* Ok. Let's restart timer. */
2675 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2676 		sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2677 		    stcb, net);
2678 	}
2679 
2680 	SCTP_INP_INFO_WUNLOCK();
2681 	if (new_inp->sctp_tcbhash != NULL) {
2682 		SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2683 		new_inp->sctp_tcbhash = NULL;
2684 	}
2685 	if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2686 		/* Subset bound, so copy in the laddr list from the old_inp */
2687 		LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2688 			laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2689 			if (laddr == NULL) {
2690 				/*
2691 				 * Gak, what can we do? This assoc is really
2692 				 * HOSED. We probably should send an abort
2693 				 * here.
2694 				 */
2695 				SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2696 				continue;
2697 			}
2698 			SCTP_INCR_LADDR_COUNT();
2699 			memset(laddr, 0, sizeof(*laddr));
2700 			(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2701 			laddr->ifa = oladdr->ifa;
2702 			atomic_add_int(&laddr->ifa->refcount, 1);
2703 			LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2704 			    sctp_nxt_addr);
2705 			new_inp->laddr_count++;
2706 			if (oladdr == stcb->asoc.last_used_address) {
2707 				stcb->asoc.last_used_address = laddr;
2708 			}
2709 		}
2710 	}
2711 	/* Now any running timers need to be adjusted. */
2712 	if (stcb->asoc.dack_timer.ep == old_inp) {
2713 		SCTP_INP_DECR_REF(old_inp);
2714 		stcb->asoc.dack_timer.ep = new_inp;
2715 		SCTP_INP_INCR_REF(new_inp);
2716 	}
2717 	if (stcb->asoc.asconf_timer.ep == old_inp) {
2718 		SCTP_INP_DECR_REF(old_inp);
2719 		stcb->asoc.asconf_timer.ep = new_inp;
2720 		SCTP_INP_INCR_REF(new_inp);
2721 	}
2722 	if (stcb->asoc.strreset_timer.ep == old_inp) {
2723 		SCTP_INP_DECR_REF(old_inp);
2724 		stcb->asoc.strreset_timer.ep = new_inp;
2725 		SCTP_INP_INCR_REF(new_inp);
2726 	}
2727 	if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2728 		SCTP_INP_DECR_REF(old_inp);
2729 		stcb->asoc.shut_guard_timer.ep = new_inp;
2730 		SCTP_INP_INCR_REF(new_inp);
2731 	}
2732 	if (stcb->asoc.autoclose_timer.ep == old_inp) {
2733 		SCTP_INP_DECR_REF(old_inp);
2734 		stcb->asoc.autoclose_timer.ep = new_inp;
2735 		SCTP_INP_INCR_REF(new_inp);
2736 	}
2737 	if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2738 		SCTP_INP_DECR_REF(old_inp);
2739 		stcb->asoc.delete_prim_timer.ep = new_inp;
2740 		SCTP_INP_INCR_REF(new_inp);
2741 	}
2742 	/* now what about the nets? */
2743 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2744 		if (net->pmtu_timer.ep == old_inp) {
2745 			SCTP_INP_DECR_REF(old_inp);
2746 			net->pmtu_timer.ep = new_inp;
2747 			SCTP_INP_INCR_REF(new_inp);
2748 		}
2749 		if (net->hb_timer.ep == old_inp) {
2750 			SCTP_INP_DECR_REF(old_inp);
2751 			net->hb_timer.ep = new_inp;
2752 			SCTP_INP_INCR_REF(new_inp);
2753 		}
2754 		if (net->rxt_timer.ep == old_inp) {
2755 			SCTP_INP_DECR_REF(old_inp);
2756 			net->rxt_timer.ep = new_inp;
2757 			SCTP_INP_INCR_REF(new_inp);
2758 		}
2759 	}
2760 	SCTP_INP_WUNLOCK(new_inp);
2761 	SCTP_INP_WUNLOCK(old_inp);
2762 }
2763 
2764 /*
2765  * insert an laddr entry with the given ifa for the desired list
2766  */
2767 static int
2768 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2769 {
2770 	struct sctp_laddr *laddr;
2771 
2772 	laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2773 	if (laddr == NULL) {
2774 		/* out of memory? */
2775 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2776 		return (EINVAL);
2777 	}
2778 	SCTP_INCR_LADDR_COUNT();
2779 	memset(laddr, 0, sizeof(*laddr));
2780 	(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2781 	laddr->ifa = ifa;
2782 	laddr->action = act;
2783 	atomic_add_int(&ifa->refcount, 1);
2784 	/* insert it */
2785 	LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2786 
2787 	return (0);
2788 }
2789 
2790 /*
2791  * Remove an laddr entry from the local address list (on an assoc)
2792  */
2793 static void
2794 sctp_remove_laddr(struct sctp_laddr *laddr)
2795 {
2796 
2797 	/* remove from the list */
2798 	LIST_REMOVE(laddr, sctp_nxt_addr);
2799 	sctp_free_ifa(laddr->ifa);
2800 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2801 	SCTP_DECR_LADDR_COUNT();
2802 }
2803 
2804 /* sctp_ifap is used to bypass normal local address validation checks */
2805 int
2806 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2807     struct sctp_ifa *sctp_ifap, struct thread *p)
2808 {
2809 	/* bind a ep to a socket address */
2810 	struct sctppcbhead *head;
2811 	struct sctp_inpcb *inp, *inp_tmp;
2812 	struct inpcb *ip_inp;
2813 	int port_reuse_active = 0;
2814 	int bindall;
2815 	uint16_t lport;
2816 	int error;
2817 	uint32_t vrf_id;
2818 
2819 	lport = 0;
2820 	bindall = 1;
2821 	inp = (struct sctp_inpcb *)so->so_pcb;
2822 	ip_inp = (struct inpcb *)so->so_pcb;
2823 #ifdef SCTP_DEBUG
2824 	if (addr) {
2825 		SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2826 		    ntohs(((struct sockaddr_in *)addr)->sin_port));
2827 		SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2828 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2829 	}
2830 #endif
2831 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2832 		/* already did a bind, subsequent binds NOT allowed ! */
2833 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2834 		return (EINVAL);
2835 	}
2836 #ifdef INVARIANTS
2837 	if (p == NULL)
2838 		panic("null proc/thread");
2839 #endif
2840 	if (addr != NULL) {
2841 		switch (addr->sa_family) {
2842 #ifdef INET
2843 		case AF_INET:
2844 			{
2845 				struct sockaddr_in *sin;
2846 
2847 				/* IPV6_V6ONLY socket? */
2848 				if (SCTP_IPV6_V6ONLY(inp)) {
2849 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2850 					return (EINVAL);
2851 				}
2852 				if (addr->sa_len != sizeof(*sin)) {
2853 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2854 					return (EINVAL);
2855 				}
2856 
2857 				sin = (struct sockaddr_in *)addr;
2858 				lport = sin->sin_port;
2859 				/*
2860 				 * For LOOPBACK the prison_local_ip4() call
2861 				 * will transmute the ip address to the
2862 				 * proper value.
2863 				 */
2864 				if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2865 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2866 					return (error);
2867 				}
2868 				if (sin->sin_addr.s_addr != INADDR_ANY) {
2869 					bindall = 0;
2870 				}
2871 				break;
2872 			}
2873 #endif
2874 #ifdef INET6
2875 		case AF_INET6:
2876 			{
2877 				/*
2878 				 * Only for pure IPv6 Address. (No IPv4
2879 				 * Mapped!)
2880 				 */
2881 				struct sockaddr_in6 *sin6;
2882 
2883 				sin6 = (struct sockaddr_in6 *)addr;
2884 
2885 				if (addr->sa_len != sizeof(*sin6)) {
2886 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887 					return (EINVAL);
2888 				}
2889 				lport = sin6->sin6_port;
2890 				/*
2891 				 * For LOOPBACK the prison_local_ip6() call
2892 				 * will transmute the ipv6 address to the
2893 				 * proper value.
2894 				 */
2895 				if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2896 				    (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2897 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2898 					return (error);
2899 				}
2900 				if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2901 					bindall = 0;
2902 					/* KAME hack: embed scopeid */
2903 					if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2904 						SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2905 						return (EINVAL);
2906 					}
2907 				}
2908 				/* this must be cleared for ifa_ifwithaddr() */
2909 				sin6->sin6_scope_id = 0;
2910 				break;
2911 			}
2912 #endif
2913 		default:
2914 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2915 			return (EAFNOSUPPORT);
2916 		}
2917 	}
2918 	SCTP_INP_INFO_WLOCK();
2919 	SCTP_INP_WLOCK(inp);
2920 	/* Setup a vrf_id to be the default for the non-bind-all case. */
2921 	vrf_id = inp->def_vrf_id;
2922 
2923 	/* increase our count due to the unlock we do */
2924 	SCTP_INP_INCR_REF(inp);
2925 	if (lport) {
2926 		/*
2927 		 * Did the caller specify a port? if so we must see if an ep
2928 		 * already has this one bound.
2929 		 */
2930 		/* got to be root to get at low ports */
2931 		if (ntohs(lport) < IPPORT_RESERVED) {
2932 			if ((p != NULL) && ((error =
2933 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
2934 			    ) != 0)) {
2935 				SCTP_INP_DECR_REF(inp);
2936 				SCTP_INP_WUNLOCK(inp);
2937 				SCTP_INP_INFO_WUNLOCK();
2938 				return (error);
2939 			}
2940 		}
2941 		SCTP_INP_WUNLOCK(inp);
2942 		if (bindall) {
2943 			vrf_id = inp->def_vrf_id;
2944 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2945 			if (inp_tmp != NULL) {
2946 				/*
2947 				 * lock guy returned and lower count note
2948 				 * that we are not bound so inp_tmp should
2949 				 * NEVER be inp. And it is this inp
2950 				 * (inp_tmp) that gets the reference bump,
2951 				 * so we must lower it.
2952 				 */
2953 				SCTP_INP_DECR_REF(inp_tmp);
2954 				/* unlock info */
2955 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2956 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2957 					/*
2958 					 * Ok, must be one-2-one and
2959 					 * allowing port re-use
2960 					 */
2961 					port_reuse_active = 1;
2962 					goto continue_anyway;
2963 				}
2964 				SCTP_INP_DECR_REF(inp);
2965 				SCTP_INP_INFO_WUNLOCK();
2966 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2967 				return (EADDRINUSE);
2968 			}
2969 		} else {
2970 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2971 			if (inp_tmp != NULL) {
2972 				/*
2973 				 * lock guy returned and lower count note
2974 				 * that we are not bound so inp_tmp should
2975 				 * NEVER be inp. And it is this inp
2976 				 * (inp_tmp) that gets the reference bump,
2977 				 * so we must lower it.
2978 				 */
2979 				SCTP_INP_DECR_REF(inp_tmp);
2980 				/* unlock info */
2981 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2982 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2983 					/*
2984 					 * Ok, must be one-2-one and
2985 					 * allowing port re-use
2986 					 */
2987 					port_reuse_active = 1;
2988 					goto continue_anyway;
2989 				}
2990 				SCTP_INP_DECR_REF(inp);
2991 				SCTP_INP_INFO_WUNLOCK();
2992 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2993 				return (EADDRINUSE);
2994 			}
2995 		}
2996 continue_anyway:
2997 		SCTP_INP_WLOCK(inp);
2998 		if (bindall) {
2999 			/* verify that no lport is not used by a singleton */
3000 			if ((port_reuse_active == 0) &&
3001 			    (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3002 				/* Sorry someone already has this one bound */
3003 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3004 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3005 					port_reuse_active = 1;
3006 				} else {
3007 					SCTP_INP_DECR_REF(inp);
3008 					SCTP_INP_WUNLOCK(inp);
3009 					SCTP_INP_INFO_WUNLOCK();
3010 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3011 					return (EADDRINUSE);
3012 				}
3013 			}
3014 		}
3015 	} else {
3016 		uint16_t first, last, candidate;
3017 		uint16_t count;
3018 		int done;
3019 
3020 		if (ip_inp->inp_flags & INP_HIGHPORT) {
3021 			first = MODULE_GLOBAL(ipport_hifirstauto);
3022 			last = MODULE_GLOBAL(ipport_hilastauto);
3023 		} else if (ip_inp->inp_flags & INP_LOWPORT) {
3024 			if (p && (error =
3025 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
3026 			    )) {
3027 				SCTP_INP_DECR_REF(inp);
3028 				SCTP_INP_WUNLOCK(inp);
3029 				SCTP_INP_INFO_WUNLOCK();
3030 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3031 				return (error);
3032 			}
3033 			first = MODULE_GLOBAL(ipport_lowfirstauto);
3034 			last = MODULE_GLOBAL(ipport_lowlastauto);
3035 		} else {
3036 			first = MODULE_GLOBAL(ipport_firstauto);
3037 			last = MODULE_GLOBAL(ipport_lastauto);
3038 		}
3039 		if (first > last) {
3040 			uint16_t temp;
3041 
3042 			temp = first;
3043 			first = last;
3044 			last = temp;
3045 		}
3046 		count = last - first + 1;	/* number of candidates */
3047 		candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3048 
3049 		done = 0;
3050 		while (!done) {
3051 			if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3052 				done = 1;
3053 			}
3054 			if (!done) {
3055 				if (--count == 0) {
3056 					SCTP_INP_DECR_REF(inp);
3057 					SCTP_INP_WUNLOCK(inp);
3058 					SCTP_INP_INFO_WUNLOCK();
3059 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3060 					return (EADDRINUSE);
3061 				}
3062 				if (candidate == last)
3063 					candidate = first;
3064 				else
3065 					candidate = candidate + 1;
3066 			}
3067 		}
3068 		lport = htons(candidate);
3069 	}
3070 	SCTP_INP_DECR_REF(inp);
3071 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3072 	    SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3073 		/*
3074 		 * this really should not happen. The guy did a non-blocking
3075 		 * bind and then did a close at the same time.
3076 		 */
3077 		SCTP_INP_WUNLOCK(inp);
3078 		SCTP_INP_INFO_WUNLOCK();
3079 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3080 		return (EINVAL);
3081 	}
3082 	/* ok we look clear to give out this port, so lets setup the binding */
3083 	if (bindall) {
3084 		/* binding to all addresses, so just set in the proper flags */
3085 		inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3086 		/* set the automatic addr changes from kernel flag */
3087 		if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3088 			sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3089 			sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3090 		} else {
3091 			sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3092 			sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3093 		}
3094 		if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3095 			sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096 		} else {
3097 			sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3098 		}
3099 		/*
3100 		 * set the automatic mobility_base from kernel flag (by
3101 		 * micchie)
3102 		 */
3103 		if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3104 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3105 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106 		} else {
3107 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3108 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109 		}
3110 		/*
3111 		 * set the automatic mobility_fasthandoff from kernel flag
3112 		 * (by micchie)
3113 		 */
3114 		if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3115 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3116 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117 		} else {
3118 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3119 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3120 		}
3121 	} else {
3122 		/*
3123 		 * bind specific, make sure flags is off and add a new
3124 		 * address structure to the sctp_addr_list inside the ep
3125 		 * structure.
3126 		 *
3127 		 * We will need to allocate one and insert it at the head.
3128 		 * The socketopt call can just insert new addresses in there
3129 		 * as well. It will also have to do the embed scope kame
3130 		 * hack too (before adding).
3131 		 */
3132 		struct sctp_ifa *ifa;
3133 		union sctp_sockstore store;
3134 
3135 		memset(&store, 0, sizeof(store));
3136 		switch (addr->sa_family) {
3137 #ifdef INET
3138 		case AF_INET:
3139 			memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3140 			store.sin.sin_port = 0;
3141 			break;
3142 #endif
3143 #ifdef INET6
3144 		case AF_INET6:
3145 			memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3146 			store.sin6.sin6_port = 0;
3147 			break;
3148 #endif
3149 		default:
3150 			break;
3151 		}
3152 		/*
3153 		 * first find the interface with the bound address need to
3154 		 * zero out the port to find the address! yuck! can't do
3155 		 * this earlier since need port for sctp_pcb_findep()
3156 		 */
3157 		if (sctp_ifap != NULL) {
3158 			ifa = sctp_ifap;
3159 		} else {
3160 			/*
3161 			 * Note for BSD we hit here always other O/S's will
3162 			 * pass things in via the sctp_ifap argument.
3163 			 */
3164 			ifa = sctp_find_ifa_by_addr(&store.sa,
3165 			    vrf_id, SCTP_ADDR_NOT_LOCKED);
3166 		}
3167 		if (ifa == NULL) {
3168 			/* Can't find an interface with that address */
3169 			SCTP_INP_WUNLOCK(inp);
3170 			SCTP_INP_INFO_WUNLOCK();
3171 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3172 			return (EADDRNOTAVAIL);
3173 		}
3174 #ifdef INET6
3175 		if (addr->sa_family == AF_INET6) {
3176 			/* GAK, more FIXME IFA lock? */
3177 			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3178 				/* Can't bind a non-existent addr. */
3179 				SCTP_INP_WUNLOCK(inp);
3180 				SCTP_INP_INFO_WUNLOCK();
3181 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3182 				return (EINVAL);
3183 			}
3184 		}
3185 #endif
3186 		/* we're not bound all */
3187 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3188 		/* allow bindx() to send ASCONF's for binding changes */
3189 		sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3190 		/* clear automatic addr changes from kernel flag */
3191 		sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3192 
3193 		/* add this address to the endpoint list */
3194 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3195 		if (error != 0) {
3196 			SCTP_INP_WUNLOCK(inp);
3197 			SCTP_INP_INFO_WUNLOCK();
3198 			return (error);
3199 		}
3200 		inp->laddr_count++;
3201 	}
3202 	/* find the bucket */
3203 	if (port_reuse_active) {
3204 		/* Put it into tcp 1-2-1 hash */
3205 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3206 		inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3207 	} else {
3208 		head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3209 	}
3210 	/* put it in the bucket */
3211 	LIST_INSERT_HEAD(head, inp, sctp_hash);
3212 	SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3213 	    (void *)head, ntohs(lport), port_reuse_active);
3214 	/* set in the port */
3215 	inp->sctp_lport = lport;
3216 
3217 	/* turn off just the unbound flag */
3218 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3219 	SCTP_INP_WUNLOCK(inp);
3220 	SCTP_INP_INFO_WUNLOCK();
3221 	return (0);
3222 }
3223 
3224 static void
3225 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3226 {
3227 	struct sctp_iterator *it, *nit;
3228 
3229 	/*
3230 	 * We enter with the only the ITERATOR_LOCK in place and a write
3231 	 * lock on the inp_info stuff.
3232 	 */
3233 	it = sctp_it_ctl.cur_it;
3234 	if (it && (it->vn != curvnet)) {
3235 		/* Its not looking at our VNET */
3236 		return;
3237 	}
3238 	if (it && (it->inp == inp)) {
3239 		/*
3240 		 * This is tricky and we hold the iterator lock, but when it
3241 		 * returns and gets the lock (when we release it) the
3242 		 * iterator will try to operate on inp. We need to stop that
3243 		 * from happening. But of course the iterator has a
3244 		 * reference on the stcb and inp. We can mark it and it will
3245 		 * stop.
3246 		 *
3247 		 * If its a single iterator situation, we set the end
3248 		 * iterator flag. Otherwise we set the iterator to go to the
3249 		 * next inp.
3250 		 *
3251 		 */
3252 		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3253 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3254 		} else {
3255 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3256 		}
3257 	}
3258 	/*
3259 	 * Now go through and remove any single reference to our inp that
3260 	 * may be still pending on the list
3261 	 */
3262 	SCTP_IPI_ITERATOR_WQ_LOCK();
3263 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3264 		if (it->vn != curvnet) {
3265 			continue;
3266 		}
3267 		if (it->inp == inp) {
3268 			/* This one points to me is it inp specific? */
3269 			if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3270 				/* Remove and free this one */
3271 				TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3272 				    it, sctp_nxt_itr);
3273 				if (it->function_atend != NULL) {
3274 					(*it->function_atend) (it->pointer, it->val);
3275 				}
3276 				SCTP_FREE(it, SCTP_M_ITER);
3277 			} else {
3278 				it->inp = LIST_NEXT(it->inp, sctp_list);
3279 				if (it->inp) {
3280 					SCTP_INP_INCR_REF(it->inp);
3281 				}
3282 			}
3283 			/*
3284 			 * When its put in the refcnt is incremented so decr
3285 			 * it
3286 			 */
3287 			SCTP_INP_DECR_REF(inp);
3288 		}
3289 	}
3290 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
3291 }
3292 
3293 /* release sctp_inpcb unbind the port */
3294 void
3295 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3296 {
3297 	/*
3298 	 * Here we free a endpoint. We must find it (if it is in the Hash
3299 	 * table) and remove it from there. Then we must also find it in the
3300 	 * overall list and remove it from there. After all removals are
3301 	 * complete then any timer has to be stopped. Then start the actual
3302 	 * freeing. a) Any local lists. b) Any associations. c) The hash of
3303 	 * all associations. d) finally the ep itself.
3304 	 */
3305 	struct sctp_tcb *asoc, *nasoc;
3306 	struct sctp_laddr *laddr, *nladdr;
3307 	struct inpcb *ip_pcb;
3308 	struct socket *so;
3309 	int being_refed = 0;
3310 	struct sctp_queued_to_read *sq, *nsq;
3311 	int cnt;
3312 	sctp_sharedkey_t *shared_key, *nshared_key;
3313 
3314 #ifdef SCTP_LOG_CLOSING
3315 	sctp_log_closing(inp, NULL, 0);
3316 #endif
3317 	SCTP_ITERATOR_LOCK();
3318 	/* mark any iterators on the list or being processed */
3319 	sctp_iterator_inp_being_freed(inp);
3320 	SCTP_ITERATOR_UNLOCK();
3321 	so = inp->sctp_socket;
3322 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3323 		/* been here before.. eeks.. get out of here */
3324 		SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3325 #ifdef SCTP_LOG_CLOSING
3326 		sctp_log_closing(inp, NULL, 1);
3327 #endif
3328 		return;
3329 	}
3330 	SCTP_ASOC_CREATE_LOCK(inp);
3331 	SCTP_INP_INFO_WLOCK();
3332 
3333 	SCTP_INP_WLOCK(inp);
3334 	if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3335 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3336 		/* socket is gone, so no more wakeups allowed */
3337 		inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3338 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3339 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3340 	}
3341 	/* First time through we have the socket lock, after that no more. */
3342 	sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3343 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3344 
3345 	if (inp->control) {
3346 		sctp_m_freem(inp->control);
3347 		inp->control = NULL;
3348 	}
3349 	if (inp->pkt) {
3350 		sctp_m_freem(inp->pkt);
3351 		inp->pkt = NULL;
3352 	}
3353 	ip_pcb = &inp->ip_inp.inp;	/* we could just cast the main pointer
3354 					 * here but I will be nice :> (i.e.
3355 					 * ip_pcb = ep;) */
3356 	if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3357 		int cnt_in_sd;
3358 
3359 		cnt_in_sd = 0;
3360 		LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3361 			SCTP_TCB_LOCK(asoc);
3362 			if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3363 				/* Skip guys being freed */
3364 				cnt_in_sd++;
3365 				if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3366 					/*
3367 					 * Special case - we did not start a
3368 					 * kill timer on the asoc due to it
3369 					 * was not closed. So go ahead and
3370 					 * start it now.
3371 					 */
3372 					SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3373 					sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3374 				}
3375 				SCTP_TCB_UNLOCK(asoc);
3376 				continue;
3377 			}
3378 			if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3379 			    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3380 			    (asoc->asoc.total_output_queue_size == 0)) {
3381 				/*
3382 				 * If we have data in queue, we don't want
3383 				 * to just free since the app may have done,
3384 				 * send()/close or connect/send/close. And
3385 				 * it wants the data to get across first.
3386 				 */
3387 				/* Just abandon things in the front states */
3388 				if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3389 				    SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3390 					cnt_in_sd++;
3391 				}
3392 				continue;
3393 			}
3394 			/* Disconnect the socket please */
3395 			asoc->sctp_socket = NULL;
3396 			SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3397 			if ((asoc->asoc.size_on_reasm_queue > 0) ||
3398 			    (asoc->asoc.control_pdapi) ||
3399 			    (asoc->asoc.size_on_all_streams > 0) ||
3400 			    (so && (so->so_rcv.sb_cc > 0))) {
3401 				/* Left with Data unread */
3402 				struct mbuf *op_err;
3403 
3404 				op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3405 				asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3406 				sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3407 				SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3408 				if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3409 				    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3410 					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3411 				}
3412 				if (sctp_free_assoc(inp, asoc,
3413 				    SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3414 					cnt_in_sd++;
3415 				}
3416 				continue;
3417 			} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3418 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3419 			    (asoc->asoc.stream_queue_cnt == 0)) {
3420 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3421 					goto abort_anyway;
3422 				}
3423 				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3424 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3425 					struct sctp_nets *netp;
3426 
3427 					/*
3428 					 * there is nothing queued to send,
3429 					 * so I send shutdown
3430 					 */
3431 					if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3432 					    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3433 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3434 					}
3435 					SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3436 					sctp_stop_timers_for_shutdown(asoc);
3437 					if (asoc->asoc.alternate) {
3438 						netp = asoc->asoc.alternate;
3439 					} else {
3440 						netp = asoc->asoc.primary_destination;
3441 					}
3442 					sctp_send_shutdown(asoc, netp);
3443 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3444 					    netp);
3445 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3446 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3447 				}
3448 			} else {
3449 				/* mark into shutdown pending */
3450 				SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3451 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3452 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3453 					SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3454 				}
3455 				if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3456 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3457 				    (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3458 					struct mbuf *op_err;
3459 
3460 			abort_anyway:
3461 					op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3462 					asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3463 					sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3464 					SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3465 					if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3466 					    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3467 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3468 					}
3469 					if (sctp_free_assoc(inp, asoc,
3470 					    SCTP_PCBFREE_NOFORCE,
3471 					    SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3472 						cnt_in_sd++;
3473 					}
3474 					continue;
3475 				} else {
3476 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3477 				}
3478 			}
3479 			cnt_in_sd++;
3480 			SCTP_TCB_UNLOCK(asoc);
3481 		}
3482 		/* now is there some left in our SHUTDOWN state? */
3483 		if (cnt_in_sd) {
3484 #ifdef SCTP_LOG_CLOSING
3485 			sctp_log_closing(inp, NULL, 2);
3486 #endif
3487 			inp->sctp_socket = NULL;
3488 			SCTP_INP_WUNLOCK(inp);
3489 			SCTP_ASOC_CREATE_UNLOCK(inp);
3490 			SCTP_INP_INFO_WUNLOCK();
3491 			return;
3492 		}
3493 	}
3494 	inp->sctp_socket = NULL;
3495 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3496 	    SCTP_PCB_FLAGS_UNBOUND) {
3497 		/*
3498 		 * ok, this guy has been bound. It's port is somewhere in
3499 		 * the SCTP_BASE_INFO(hash table). Remove it!
3500 		 */
3501 		LIST_REMOVE(inp, sctp_hash);
3502 		inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3503 	}
3504 
3505 	/*
3506 	 * If there is a timer running to kill us, forget it, since it may
3507 	 * have a contest on the INP lock.. which would cause us to die ...
3508 	 */
3509 	cnt = 0;
3510 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3511 		SCTP_TCB_LOCK(asoc);
3512 		if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3513 			/* Disconnect the socket please */
3514 			asoc->sctp_socket = NULL;
3515 			SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3516 		}
3517 		if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3518 			if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3519 				SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3520 				sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3521 			}
3522 			cnt++;
3523 			SCTP_TCB_UNLOCK(asoc);
3524 			continue;
3525 		}
3526 		/* Free associations that are NOT killing us */
3527 		if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3528 		    ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3529 			struct mbuf *op_err;
3530 
3531 			op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3532 			asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3533 			sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3534 			SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3535 		} else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3536 			cnt++;
3537 			SCTP_TCB_UNLOCK(asoc);
3538 			continue;
3539 		}
3540 		if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3541 		    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3542 			SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3543 		}
3544 		if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3545 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3546 			cnt++;
3547 		}
3548 	}
3549 	if (cnt) {
3550 		/* Ok we have someone out there that will kill us */
3551 #ifdef SCTP_LOG_CLOSING
3552 		sctp_log_closing(inp, NULL, 3);
3553 #endif
3554 		SCTP_INP_WUNLOCK(inp);
3555 		SCTP_ASOC_CREATE_UNLOCK(inp);
3556 		SCTP_INP_INFO_WUNLOCK();
3557 		return;
3558 	}
3559 	if (SCTP_INP_LOCK_CONTENDED(inp))
3560 		being_refed++;
3561 	if (SCTP_INP_READ_CONTENDED(inp))
3562 		being_refed++;
3563 	if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3564 		being_refed++;
3565 	/* NOTE: 0 refcount also means no timers are referencing us. */
3566 	if ((inp->refcount) ||
3567 	    (being_refed) ||
3568 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3569 #ifdef SCTP_LOG_CLOSING
3570 		sctp_log_closing(inp, NULL, 4);
3571 #endif
3572 		sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3573 		SCTP_INP_WUNLOCK(inp);
3574 		SCTP_ASOC_CREATE_UNLOCK(inp);
3575 		SCTP_INP_INFO_WUNLOCK();
3576 		return;
3577 	}
3578 	inp->sctp_ep.signature_change.type = 0;
3579 	inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3580 	/*
3581 	 * Remove it from the list .. last thing we need a lock for.
3582 	 */
3583 	LIST_REMOVE(inp, sctp_list);
3584 	SCTP_INP_WUNLOCK(inp);
3585 	SCTP_ASOC_CREATE_UNLOCK(inp);
3586 	SCTP_INP_INFO_WUNLOCK();
3587 
3588 #ifdef SCTP_LOG_CLOSING
3589 	sctp_log_closing(inp, NULL, 5);
3590 #endif
3591 	if ((inp->sctp_asocidhash) != NULL) {
3592 		SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3593 		inp->sctp_asocidhash = NULL;
3594 	}
3595 	/* sa_ignore FREED_MEMORY */
3596 	TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3597 		/* Its only abandoned if it had data left */
3598 		if (sq->length)
3599 			SCTP_STAT_INCR(sctps_left_abandon);
3600 
3601 		TAILQ_REMOVE(&inp->read_queue, sq, next);
3602 		sctp_free_remote_addr(sq->whoFrom);
3603 		if (so)
3604 			so->so_rcv.sb_cc -= sq->length;
3605 		if (sq->data) {
3606 			sctp_m_freem(sq->data);
3607 			sq->data = NULL;
3608 		}
3609 		/*
3610 		 * no need to free the net count, since at this point all
3611 		 * assoc's are gone.
3612 		 */
3613 		sctp_free_a_readq(NULL, sq);
3614 	}
3615 	/* Now the sctp_pcb things */
3616 	/*
3617 	 * free each asoc if it is not already closed/free. we can't use the
3618 	 * macro here since le_next will get freed as part of the
3619 	 * sctp_free_assoc() call.
3620 	 */
3621 	if (ip_pcb->inp_options) {
3622 		(void)sctp_m_free(ip_pcb->inp_options);
3623 		ip_pcb->inp_options = 0;
3624 	}
3625 #ifdef INET6
3626 	if (ip_pcb->inp_vflag & INP_IPV6) {
3627 		ip6_freepcbopts(ip_pcb->in6p_outputopts);
3628 	}
3629 #endif				/* INET6 */
3630 	ip_pcb->inp_vflag = 0;
3631 	/* free up authentication fields */
3632 	if (inp->sctp_ep.local_auth_chunks != NULL)
3633 		sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3634 	if (inp->sctp_ep.local_hmacs != NULL)
3635 		sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3636 
3637 	LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3638 		LIST_REMOVE(shared_key, next);
3639 		sctp_free_sharedkey(shared_key);
3640 		/* sa_ignore FREED_MEMORY */
3641 	}
3642 
3643 	/*
3644 	 * if we have an address list the following will free the list of
3645 	 * ifaddr's that are set into this ep. Again macro limitations here,
3646 	 * since the LIST_FOREACH could be a bad idea.
3647 	 */
3648 	LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3649 		sctp_remove_laddr(laddr);
3650 	}
3651 
3652 #ifdef SCTP_TRACK_FREED_ASOCS
3653 	/* TEMP CODE */
3654 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3655 		LIST_REMOVE(asoc, sctp_tcblist);
3656 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3657 		SCTP_DECR_ASOC_COUNT();
3658 	}
3659 	/* *** END TEMP CODE *** */
3660 #endif
3661 	/* Now lets see about freeing the EP hash table. */
3662 	if (inp->sctp_tcbhash != NULL) {
3663 		SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3664 		inp->sctp_tcbhash = NULL;
3665 	}
3666 	/* Now we must put the ep memory back into the zone pool */
3667 	crfree(inp->ip_inp.inp.inp_cred);
3668 	INP_LOCK_DESTROY(&inp->ip_inp.inp);
3669 	SCTP_INP_LOCK_DESTROY(inp);
3670 	SCTP_INP_READ_DESTROY(inp);
3671 	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3672 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3673 	SCTP_DECR_EP_COUNT();
3674 }
3675 
3676 struct sctp_nets *
3677 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3678 {
3679 	struct sctp_nets *net;
3680 
3681 	/* locate the address */
3682 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3683 		if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3684 			return (net);
3685 	}
3686 	return (NULL);
3687 }
3688 
3689 int
3690 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3691 {
3692 	struct sctp_ifa *sctp_ifa;
3693 
3694 	sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3695 	if (sctp_ifa) {
3696 		return (1);
3697 	} else {
3698 		return (0);
3699 	}
3700 }
3701 
3702 /*
3703  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3704  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3705  * stats of stuff.
3706  */
3707 int
3708 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3709     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3710 {
3711 	/*
3712 	 * The following is redundant to the same lines in the
3713 	 * sctp_aloc_assoc() but is needed since others call the add address
3714 	 * function
3715 	 */
3716 	struct sctp_nets *net, *netfirst;
3717 	int addr_inscope;
3718 
3719 	SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3720 	    from);
3721 	SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3722 
3723 	netfirst = sctp_findnet(stcb, newaddr);
3724 	if (netfirst) {
3725 		/*
3726 		 * Lie and return ok, we don't want to make the association
3727 		 * go away for this behavior. It will happen in the TCP
3728 		 * model in a connected socket. It does not reach the hash
3729 		 * table until after the association is built so it can't be
3730 		 * found. Mark as reachable, since the initial creation will
3731 		 * have been cleared and the NOT_IN_ASSOC flag will have
3732 		 * been added... and we don't want to end up removing it
3733 		 * back out.
3734 		 */
3735 		if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3736 			netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3737 			    SCTP_ADDR_UNCONFIRMED);
3738 		} else {
3739 			netfirst->dest_state = SCTP_ADDR_REACHABLE;
3740 		}
3741 
3742 		return (0);
3743 	}
3744 	addr_inscope = 1;
3745 	switch (newaddr->sa_family) {
3746 #ifdef INET
3747 	case AF_INET:
3748 		{
3749 			struct sockaddr_in *sin;
3750 
3751 			sin = (struct sockaddr_in *)newaddr;
3752 			if (sin->sin_addr.s_addr == 0) {
3753 				/* Invalid address */
3754 				return (-1);
3755 			}
3756 			/* zero out the zero area */
3757 			memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3758 
3759 			/* assure len is set */
3760 			sin->sin_len = sizeof(struct sockaddr_in);
3761 			if (set_scope) {
3762 				if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3763 					stcb->asoc.scope.ipv4_local_scope = 1;
3764 				}
3765 			} else {
3766 				/* Validate the address is in scope */
3767 				if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3768 				    (stcb->asoc.scope.ipv4_local_scope == 0)) {
3769 					addr_inscope = 0;
3770 				}
3771 			}
3772 			break;
3773 		}
3774 #endif
3775 #ifdef INET6
3776 	case AF_INET6:
3777 		{
3778 			struct sockaddr_in6 *sin6;
3779 
3780 			sin6 = (struct sockaddr_in6 *)newaddr;
3781 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3782 				/* Invalid address */
3783 				return (-1);
3784 			}
3785 			/* assure len is set */
3786 			sin6->sin6_len = sizeof(struct sockaddr_in6);
3787 			if (set_scope) {
3788 				if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3789 					stcb->asoc.scope.loopback_scope = 1;
3790 					stcb->asoc.scope.local_scope = 0;
3791 					stcb->asoc.scope.ipv4_local_scope = 1;
3792 					stcb->asoc.scope.site_scope = 1;
3793 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3794 					/*
3795 					 * If the new destination is a
3796 					 * LINK_LOCAL we must have common
3797 					 * site scope. Don't set the local
3798 					 * scope since we may not share all
3799 					 * links, only loopback can do this.
3800 					 * Links on the local network would
3801 					 * also be on our private network
3802 					 * for v4 too.
3803 					 */
3804 					stcb->asoc.scope.ipv4_local_scope = 1;
3805 					stcb->asoc.scope.site_scope = 1;
3806 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3807 					/*
3808 					 * If the new destination is
3809 					 * SITE_LOCAL then we must have site
3810 					 * scope in common.
3811 					 */
3812 					stcb->asoc.scope.site_scope = 1;
3813 				}
3814 			} else {
3815 				/* Validate the address is in scope */
3816 				if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3817 				    (stcb->asoc.scope.loopback_scope == 0)) {
3818 					addr_inscope = 0;
3819 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3820 				    (stcb->asoc.scope.local_scope == 0)) {
3821 					addr_inscope = 0;
3822 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3823 				    (stcb->asoc.scope.site_scope == 0)) {
3824 					addr_inscope = 0;
3825 				}
3826 			}
3827 			break;
3828 		}
3829 #endif
3830 	default:
3831 		/* not supported family type */
3832 		return (-1);
3833 	}
3834 	net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3835 	if (net == NULL) {
3836 		return (-1);
3837 	}
3838 	SCTP_INCR_RADDR_COUNT();
3839 	memset(net, 0, sizeof(struct sctp_nets));
3840 	(void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3841 	memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3842 	switch (newaddr->sa_family) {
3843 #ifdef INET
3844 	case AF_INET:
3845 		((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3846 		break;
3847 #endif
3848 #ifdef INET6
3849 	case AF_INET6:
3850 		((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3851 		break;
3852 #endif
3853 	default:
3854 		break;
3855 	}
3856 	net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3857 	if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3858 		stcb->asoc.scope.loopback_scope = 1;
3859 		stcb->asoc.scope.ipv4_local_scope = 1;
3860 		stcb->asoc.scope.local_scope = 0;
3861 		stcb->asoc.scope.site_scope = 1;
3862 		addr_inscope = 1;
3863 	}
3864 	net->failure_threshold = stcb->asoc.def_net_failure;
3865 	net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3866 	if (addr_inscope == 0) {
3867 		net->dest_state = (SCTP_ADDR_REACHABLE |
3868 		    SCTP_ADDR_OUT_OF_SCOPE);
3869 	} else {
3870 		if (from == SCTP_ADDR_IS_CONFIRMED)
3871 			/* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3872 			net->dest_state = SCTP_ADDR_REACHABLE;
3873 		else
3874 			net->dest_state = SCTP_ADDR_REACHABLE |
3875 			    SCTP_ADDR_UNCONFIRMED;
3876 	}
3877 	/*
3878 	 * We set this to 0, the timer code knows that this means its an
3879 	 * initial value
3880 	 */
3881 	net->rto_needed = 1;
3882 	net->RTO = 0;
3883 	net->RTO_measured = 0;
3884 	stcb->asoc.numnets++;
3885 	net->ref_count = 1;
3886 	net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3887 	net->port = port;
3888 	net->dscp = stcb->asoc.default_dscp;
3889 #ifdef INET6
3890 	net->flowlabel = stcb->asoc.default_flowlabel;
3891 #endif
3892 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3893 		net->dest_state |= SCTP_ADDR_NOHB;
3894 	} else {
3895 		net->dest_state &= ~SCTP_ADDR_NOHB;
3896 	}
3897 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3898 		net->dest_state |= SCTP_ADDR_NO_PMTUD;
3899 	} else {
3900 		net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3901 	}
3902 	net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3903 	/* Init the timer structure */
3904 	SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3905 	SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3906 	SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3907 
3908 	/* Now generate a route for this guy */
3909 #ifdef INET6
3910 	/* KAME hack: embed scopeid */
3911 	if (newaddr->sa_family == AF_INET6) {
3912 		struct sockaddr_in6 *sin6;
3913 
3914 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3915 		(void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3916 		sin6->sin6_scope_id = 0;
3917 	}
3918 #endif
3919 	SCTP_RTALLOC((sctp_route_t *)&net->ro,
3920 	    stcb->asoc.vrf_id,
3921 	    stcb->sctp_ep->fibnum);
3922 
3923 	net->src_addr_selected = 0;
3924 	if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3925 		/* Get source address */
3926 		net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3927 		    stcb,
3928 		    (sctp_route_t *)&net->ro,
3929 		    net,
3930 		    0,
3931 		    stcb->asoc.vrf_id);
3932 		if (stcb->asoc.default_mtu > 0) {
3933 			net->mtu = stcb->asoc.default_mtu;
3934 			switch (net->ro._l_addr.sa.sa_family) {
3935 #ifdef INET
3936 			case AF_INET:
3937 				net->mtu += SCTP_MIN_V4_OVERHEAD;
3938 				break;
3939 #endif
3940 #ifdef INET6
3941 			case AF_INET6:
3942 				net->mtu += SCTP_MIN_OVERHEAD;
3943 				break;
3944 #endif
3945 			default:
3946 				break;
3947 			}
3948 #if defined(INET) || defined(INET6)
3949 			if (net->port) {
3950 				net->mtu += (uint32_t)sizeof(struct udphdr);
3951 			}
3952 #endif
3953 		} else if (net->ro._s_addr != NULL) {
3954 			uint32_t imtu, rmtu, hcmtu;
3955 
3956 			net->src_addr_selected = 1;
3957 			/* Now get the interface MTU */
3958 			if (net->ro._s_addr->ifn_p != NULL) {
3959 				imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3960 			} else {
3961 				imtu = 0;
3962 			}
3963 			rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3964 			hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3965 			net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3966 		}
3967 	}
3968 	if (net->mtu == 0) {
3969 		if (stcb->asoc.default_mtu > 0) {
3970 			net->mtu = stcb->asoc.default_mtu;
3971 			switch (net->ro._l_addr.sa.sa_family) {
3972 #ifdef INET
3973 			case AF_INET:
3974 				net->mtu += SCTP_MIN_V4_OVERHEAD;
3975 				break;
3976 #endif
3977 #ifdef INET6
3978 			case AF_INET6:
3979 				net->mtu += SCTP_MIN_OVERHEAD;
3980 				break;
3981 #endif
3982 			default:
3983 				break;
3984 			}
3985 #if defined(INET) || defined(INET6)
3986 			if (net->port) {
3987 				net->mtu += (uint32_t)sizeof(struct udphdr);
3988 			}
3989 #endif
3990 		} else {
3991 			switch (newaddr->sa_family) {
3992 #ifdef INET
3993 			case AF_INET:
3994 				net->mtu = SCTP_DEFAULT_MTU;
3995 				break;
3996 #endif
3997 #ifdef INET6
3998 			case AF_INET6:
3999 				net->mtu = 1280;
4000 				break;
4001 #endif
4002 			default:
4003 				break;
4004 			}
4005 		}
4006 	}
4007 #if defined(INET) || defined(INET6)
4008 	if (net->port) {
4009 		net->mtu -= (uint32_t)sizeof(struct udphdr);
4010 	}
4011 #endif
4012 	if (from == SCTP_ALLOC_ASOC) {
4013 		stcb->asoc.smallest_mtu = net->mtu;
4014 	}
4015 	if (stcb->asoc.smallest_mtu > net->mtu) {
4016 		sctp_pathmtu_adjustment(stcb, net->mtu);
4017 	}
4018 #ifdef INET6
4019 	if (newaddr->sa_family == AF_INET6) {
4020 		struct sockaddr_in6 *sin6;
4021 
4022 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4023 		(void)sa6_recoverscope(sin6);
4024 	}
4025 #endif
4026 
4027 	/* JRS - Use the congestion control given in the CC module */
4028 	if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4029 		(*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4030 
4031 	/*
4032 	 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4033 	 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4034 	 */
4035 	net->find_pseudo_cumack = 1;
4036 	net->find_rtx_pseudo_cumack = 1;
4037 	/* Choose an initial flowid. */
4038 	net->flowid = stcb->asoc.my_vtag ^
4039 	    ntohs(stcb->rport) ^
4040 	    ntohs(stcb->sctp_ep->sctp_lport);
4041 	net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4042 	if (netp) {
4043 		*netp = net;
4044 	}
4045 	netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4046 	if (net->ro.ro_nh == NULL) {
4047 		/* Since we have no route put it at the back */
4048 		TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4049 	} else if (netfirst == NULL) {
4050 		/* We are the first one in the pool. */
4051 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4052 	} else if (netfirst->ro.ro_nh == NULL) {
4053 		/*
4054 		 * First one has NO route. Place this one ahead of the first
4055 		 * one.
4056 		 */
4057 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4058 	} else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4059 		/*
4060 		 * This one has a different interface than the one at the
4061 		 * top of the list. Place it ahead.
4062 		 */
4063 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4064 	} else {
4065 		/*
4066 		 * Ok we have the same interface as the first one. Move
4067 		 * forward until we find either a) one with a NULL route...
4068 		 * insert ahead of that b) one with a different ifp.. insert
4069 		 * after that. c) end of the list.. insert at the tail.
4070 		 */
4071 		struct sctp_nets *netlook;
4072 
4073 		do {
4074 			netlook = TAILQ_NEXT(netfirst, sctp_next);
4075 			if (netlook == NULL) {
4076 				/* End of the list */
4077 				TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4078 				break;
4079 			} else if (netlook->ro.ro_nh == NULL) {
4080 				/* next one has NO route */
4081 				TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4082 				break;
4083 			} else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4084 				TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4085 				    net, sctp_next);
4086 				break;
4087 			}
4088 			/* Shift forward */
4089 			netfirst = netlook;
4090 		} while (netlook != NULL);
4091 	}
4092 
4093 	/* got to have a primary set */
4094 	if (stcb->asoc.primary_destination == 0) {
4095 		stcb->asoc.primary_destination = net;
4096 	} else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4097 		    (net->ro.ro_nh) &&
4098 	    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4099 		/* No route to current primary adopt new primary */
4100 		stcb->asoc.primary_destination = net;
4101 	}
4102 	/* Validate primary is first */
4103 	net = TAILQ_FIRST(&stcb->asoc.nets);
4104 	if ((net != stcb->asoc.primary_destination) &&
4105 	    (stcb->asoc.primary_destination)) {
4106 		/*
4107 		 * first one on the list is NOT the primary sctp_cmpaddr()
4108 		 * is much more efficient if the primary is the first on the
4109 		 * list, make it so.
4110 		 */
4111 		TAILQ_REMOVE(&stcb->asoc.nets,
4112 		    stcb->asoc.primary_destination, sctp_next);
4113 		TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4114 		    stcb->asoc.primary_destination, sctp_next);
4115 	}
4116 	return (0);
4117 }
4118 
4119 static uint32_t
4120 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4121 {
4122 	uint32_t id;
4123 	struct sctpasochead *head;
4124 	struct sctp_tcb *lstcb;
4125 
4126 try_again:
4127 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4128 		/* TSNH */
4129 		return (0);
4130 	}
4131 	/*
4132 	 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4133 	 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4134 	 */
4135 	if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4136 		inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4137 	}
4138 	id = inp->sctp_associd_counter;
4139 	inp->sctp_associd_counter++;
4140 	lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4141 	if (lstcb) {
4142 		goto try_again;
4143 	}
4144 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4145 	LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4146 	stcb->asoc.in_asocid_hash = 1;
4147 	return (id);
4148 }
4149 
4150 /*
4151  * allocate an association and add it to the endpoint. The caller must be
4152  * careful to add all additional addresses once they are know right away or
4153  * else the assoc will be may experience a blackout scenario.
4154  */
4155 struct sctp_tcb *
4156 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4157     int *error, uint32_t override_tag, uint32_t vrf_id,
4158     uint16_t o_streams, uint16_t port,
4159     struct thread *p,
4160     int initialize_auth_params)
4161 {
4162 	/* note the p argument is only valid in unbound sockets */
4163 
4164 	struct sctp_tcb *stcb;
4165 	struct sctp_association *asoc;
4166 	struct sctpasochead *head;
4167 	uint16_t rport;
4168 	int err;
4169 
4170 	/*
4171 	 * Assumption made here: Caller has done a
4172 	 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4173 	 * address does not exist already.
4174 	 */
4175 	if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4176 		/* Hit max assoc, sorry no more */
4177 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4178 		*error = ENOBUFS;
4179 		return (NULL);
4180 	}
4181 	if (firstaddr == NULL) {
4182 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4183 		*error = EINVAL;
4184 		return (NULL);
4185 	}
4186 	SCTP_INP_RLOCK(inp);
4187 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4188 	    ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4189 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4190 		/*
4191 		 * If its in the TCP pool, its NOT allowed to create an
4192 		 * association. The parent listener needs to call
4193 		 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4194 		 * off, or connected one does this.. its an error.
4195 		 */
4196 		SCTP_INP_RUNLOCK(inp);
4197 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4198 		*error = EINVAL;
4199 		return (NULL);
4200 	}
4201 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4202 	    (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4203 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4204 		    (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4205 			SCTP_INP_RUNLOCK(inp);
4206 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4207 			*error = EINVAL;
4208 			return (NULL);
4209 		}
4210 	}
4211 	SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4212 #ifdef SCTP_DEBUG
4213 	if (firstaddr) {
4214 		SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4215 		switch (firstaddr->sa_family) {
4216 #ifdef INET
4217 		case AF_INET:
4218 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4219 			    ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4220 			break;
4221 #endif
4222 #ifdef INET6
4223 		case AF_INET6:
4224 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4225 			    ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4226 			break;
4227 #endif
4228 		default:
4229 			break;
4230 		}
4231 	} else {
4232 		SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4233 	}
4234 #endif				/* SCTP_DEBUG */
4235 	switch (firstaddr->sa_family) {
4236 #ifdef INET
4237 	case AF_INET:
4238 		{
4239 			struct sockaddr_in *sin;
4240 
4241 			sin = (struct sockaddr_in *)firstaddr;
4242 			if ((ntohs(sin->sin_port) == 0) ||
4243 			    (sin->sin_addr.s_addr == INADDR_ANY) ||
4244 			    (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4245 			    IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4246 			    (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) &&
4247 			    (SCTP_IPV6_V6ONLY(inp) != 0))) {
4248 				/* Invalid address */
4249 				SCTP_INP_RUNLOCK(inp);
4250 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4251 				*error = EINVAL;
4252 				return (NULL);
4253 			}
4254 			rport = sin->sin_port;
4255 			break;
4256 		}
4257 #endif
4258 #ifdef INET6
4259 	case AF_INET6:
4260 		{
4261 			struct sockaddr_in6 *sin6;
4262 
4263 			sin6 = (struct sockaddr_in6 *)firstaddr;
4264 			if ((ntohs(sin6->sin6_port) == 0) ||
4265 			    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4266 			    IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4267 			    ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4268 				/* Invalid address */
4269 				SCTP_INP_RUNLOCK(inp);
4270 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4271 				*error = EINVAL;
4272 				return (NULL);
4273 			}
4274 			rport = sin6->sin6_port;
4275 			break;
4276 		}
4277 #endif
4278 	default:
4279 		/* not supported family type */
4280 		SCTP_INP_RUNLOCK(inp);
4281 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4282 		*error = EINVAL;
4283 		return (NULL);
4284 	}
4285 	SCTP_INP_RUNLOCK(inp);
4286 	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4287 		/*
4288 		 * If you have not performed a bind, then we need to do the
4289 		 * ephemeral bind for you.
4290 		 */
4291 		if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4292 			/* bind error, probably perm */
4293 			*error = err;
4294 			return (NULL);
4295 		}
4296 	}
4297 	stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4298 	if (stcb == NULL) {
4299 		/* out of memory? */
4300 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4301 		*error = ENOMEM;
4302 		return (NULL);
4303 	}
4304 	SCTP_INCR_ASOC_COUNT();
4305 
4306 	memset(stcb, 0, sizeof(*stcb));
4307 	asoc = &stcb->asoc;
4308 
4309 	SCTP_TCB_LOCK_INIT(stcb);
4310 	SCTP_TCB_SEND_LOCK_INIT(stcb);
4311 	stcb->rport = rport;
4312 	/* setup back pointer's */
4313 	stcb->sctp_ep = inp;
4314 	stcb->sctp_socket = inp->sctp_socket;
4315 	if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4316 		/* failed */
4317 		SCTP_TCB_LOCK_DESTROY(stcb);
4318 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4319 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4320 		SCTP_DECR_ASOC_COUNT();
4321 		*error = err;
4322 		return (NULL);
4323 	}
4324 	/* and the port */
4325 	SCTP_INP_INFO_WLOCK();
4326 	SCTP_INP_WLOCK(inp);
4327 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4328 		/* inpcb freed while alloc going on */
4329 		SCTP_TCB_LOCK_DESTROY(stcb);
4330 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4331 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4332 		SCTP_INP_WUNLOCK(inp);
4333 		SCTP_INP_INFO_WUNLOCK();
4334 		SCTP_DECR_ASOC_COUNT();
4335 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4336 		*error = EINVAL;
4337 		return (NULL);
4338 	}
4339 	SCTP_TCB_LOCK(stcb);
4340 
4341 	asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4342 	/* now that my_vtag is set, add it to the hash */
4343 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4344 	/* put it in the bucket in the vtag hash of assoc's for the system */
4345 	LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4346 	SCTP_INP_INFO_WUNLOCK();
4347 
4348 	if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4349 		/* failure.. memory error? */
4350 		if (asoc->strmout) {
4351 			SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4352 			asoc->strmout = NULL;
4353 		}
4354 		if (asoc->mapping_array) {
4355 			SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4356 			asoc->mapping_array = NULL;
4357 		}
4358 		if (asoc->nr_mapping_array) {
4359 			SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4360 			asoc->nr_mapping_array = NULL;
4361 		}
4362 		SCTP_DECR_ASOC_COUNT();
4363 		SCTP_TCB_UNLOCK(stcb);
4364 		SCTP_TCB_LOCK_DESTROY(stcb);
4365 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4366 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4367 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4368 		SCTP_INP_WUNLOCK(inp);
4369 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4370 		*error = ENOBUFS;
4371 		return (NULL);
4372 	}
4373 	/* Init all the timers */
4374 	SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4375 	SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4376 	SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4377 	SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4378 	SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4379 	SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4380 
4381 	LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4382 	/* now file the port under the hash as well */
4383 	if (inp->sctp_tcbhash != NULL) {
4384 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4385 		    inp->sctp_hashmark)];
4386 		LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4387 	}
4388 	if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4389 		sctp_initialize_auth_params(inp, stcb);
4390 	}
4391 	SCTP_INP_WUNLOCK(inp);
4392 	SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4393 	return (stcb);
4394 }
4395 
4396 void
4397 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4398 {
4399 	struct sctp_inpcb *inp;
4400 	struct sctp_association *asoc;
4401 
4402 	inp = stcb->sctp_ep;
4403 	asoc = &stcb->asoc;
4404 	asoc->numnets--;
4405 	TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4406 	if (net == asoc->primary_destination) {
4407 		/* Reset primary */
4408 		struct sctp_nets *lnet;
4409 
4410 		lnet = TAILQ_FIRST(&asoc->nets);
4411 		/*
4412 		 * Mobility adaptation Ideally, if deleted destination is
4413 		 * the primary, it becomes a fast retransmission trigger by
4414 		 * the subsequent SET PRIMARY. (by micchie)
4415 		 */
4416 		if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4417 		    SCTP_MOBILITY_BASE) ||
4418 		    sctp_is_mobility_feature_on(stcb->sctp_ep,
4419 		    SCTP_MOBILITY_FASTHANDOFF)) {
4420 			SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4421 			if (asoc->deleted_primary != NULL) {
4422 				SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4423 				goto out;
4424 			}
4425 			asoc->deleted_primary = net;
4426 			atomic_add_int(&net->ref_count, 1);
4427 			memset(&net->lastsa, 0, sizeof(net->lastsa));
4428 			memset(&net->lastsv, 0, sizeof(net->lastsv));
4429 			sctp_mobility_feature_on(stcb->sctp_ep,
4430 			    SCTP_MOBILITY_PRIM_DELETED);
4431 			sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4432 			    stcb->sctp_ep, stcb, NULL);
4433 		}
4434 out:
4435 		/* Try to find a confirmed primary */
4436 		asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4437 	}
4438 	if (net == asoc->last_data_chunk_from) {
4439 		/* Reset primary */
4440 		asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4441 	}
4442 	if (net == asoc->last_control_chunk_from) {
4443 		/* Clear net */
4444 		asoc->last_control_chunk_from = NULL;
4445 	}
4446 	if (net == asoc->last_net_cmt_send_started) {
4447 		/* Clear net */
4448 		asoc->last_net_cmt_send_started = NULL;
4449 	}
4450 	if (net == stcb->asoc.alternate) {
4451 		sctp_free_remote_addr(stcb->asoc.alternate);
4452 		stcb->asoc.alternate = NULL;
4453 	}
4454 	sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4455 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4456 	sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4457 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4458 	net->dest_state |= SCTP_ADDR_BEING_DELETED;
4459 	sctp_free_remote_addr(net);
4460 }
4461 
4462 /*
4463  * remove a remote endpoint address from an association, it will fail if the
4464  * address does not exist.
4465  */
4466 int
4467 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4468 {
4469 	/*
4470 	 * Here we need to remove a remote address. This is quite simple, we
4471 	 * first find it in the list of address for the association
4472 	 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4473 	 * on that item. Note we do not allow it to be removed if there are
4474 	 * no other addresses.
4475 	 */
4476 	struct sctp_association *asoc;
4477 	struct sctp_nets *net, *nnet;
4478 
4479 	asoc = &stcb->asoc;
4480 
4481 	/* locate the address */
4482 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4483 		if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4484 			continue;
4485 		}
4486 		if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4487 		    remaddr)) {
4488 			/* we found the guy */
4489 			if (asoc->numnets < 2) {
4490 				/* Must have at LEAST two remote addresses */
4491 				return (-1);
4492 			} else {
4493 				sctp_remove_net(stcb, net);
4494 				return (0);
4495 			}
4496 		}
4497 	}
4498 	/* not found. */
4499 	return (-2);
4500 }
4501 
4502 void
4503 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4504 {
4505 	struct sctpvtaghead *chain;
4506 	struct sctp_tagblock *twait_block;
4507 	int found = 0;
4508 	int i;
4509 
4510 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4511 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4512 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4513 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4514 			    (twait_block->vtag_block[i].lport == lport) &&
4515 			    (twait_block->vtag_block[i].rport == rport)) {
4516 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4517 				twait_block->vtag_block[i].v_tag = 0;
4518 				twait_block->vtag_block[i].lport = 0;
4519 				twait_block->vtag_block[i].rport = 0;
4520 				found = 1;
4521 				break;
4522 			}
4523 		}
4524 		if (found)
4525 			break;
4526 	}
4527 }
4528 
4529 int
4530 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4531 {
4532 	struct sctpvtaghead *chain;
4533 	struct sctp_tagblock *twait_block;
4534 	int found = 0;
4535 	int i;
4536 
4537 	SCTP_INP_INFO_WLOCK();
4538 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4539 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4540 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4541 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4542 			    (twait_block->vtag_block[i].lport == lport) &&
4543 			    (twait_block->vtag_block[i].rport == rport)) {
4544 				found = 1;
4545 				break;
4546 			}
4547 		}
4548 		if (found)
4549 			break;
4550 	}
4551 	SCTP_INP_INFO_WUNLOCK();
4552 	return (found);
4553 }
4554 
4555 void
4556 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4557 {
4558 	struct sctpvtaghead *chain;
4559 	struct sctp_tagblock *twait_block;
4560 	struct timeval now;
4561 	int set, i;
4562 
4563 	if (time == 0) {
4564 		/* Its disabled */
4565 		return;
4566 	}
4567 	(void)SCTP_GETTIME_TIMEVAL(&now);
4568 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4569 	set = 0;
4570 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4571 		/* Block(s) present, lets find space, and expire on the fly */
4572 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4573 			if ((twait_block->vtag_block[i].v_tag == 0) &&
4574 			    !set) {
4575 				twait_block->vtag_block[i].tv_sec_at_expire =
4576 				    now.tv_sec + time;
4577 				twait_block->vtag_block[i].v_tag = tag;
4578 				twait_block->vtag_block[i].lport = lport;
4579 				twait_block->vtag_block[i].rport = rport;
4580 				set = 1;
4581 			} else if ((twait_block->vtag_block[i].v_tag) &&
4582 			    ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4583 				/* Audit expires this guy */
4584 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4585 				twait_block->vtag_block[i].v_tag = 0;
4586 				twait_block->vtag_block[i].lport = 0;
4587 				twait_block->vtag_block[i].rport = 0;
4588 				if (set == 0) {
4589 					/* Reuse it for my new tag */
4590 					twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4591 					twait_block->vtag_block[i].v_tag = tag;
4592 					twait_block->vtag_block[i].lport = lport;
4593 					twait_block->vtag_block[i].rport = rport;
4594 					set = 1;
4595 				}
4596 			}
4597 		}
4598 		if (set) {
4599 			/*
4600 			 * We only do up to the block where we can place our
4601 			 * tag for audits
4602 			 */
4603 			break;
4604 		}
4605 	}
4606 	/* Need to add a new block to chain */
4607 	if (!set) {
4608 		SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4609 		    sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4610 		if (twait_block == NULL) {
4611 			return;
4612 		}
4613 		memset(twait_block, 0, sizeof(struct sctp_tagblock));
4614 		LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4615 		twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4616 		twait_block->vtag_block[0].v_tag = tag;
4617 		twait_block->vtag_block[0].lport = lport;
4618 		twait_block->vtag_block[0].rport = rport;
4619 	}
4620 }
4621 
4622 void
4623 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4624 {
4625 	struct sctp_tmit_chunk *chk, *nchk;
4626 	struct sctp_queued_to_read *control, *ncontrol;
4627 
4628 	TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4629 		TAILQ_REMOVE(rh, control, next_instrm);
4630 		control->on_strm_q = 0;
4631 		if (control->on_read_q == 0) {
4632 			sctp_free_remote_addr(control->whoFrom);
4633 			if (control->data) {
4634 				sctp_m_freem(control->data);
4635 				control->data = NULL;
4636 			}
4637 		}
4638 		/* Reassembly free? */
4639 		TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4640 			TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4641 			if (chk->data) {
4642 				sctp_m_freem(chk->data);
4643 				chk->data = NULL;
4644 			}
4645 			if (chk->holds_key_ref)
4646 				sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4647 			sctp_free_remote_addr(chk->whoTo);
4648 			SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4649 			SCTP_DECR_CHK_COUNT();
4650 			/* sa_ignore FREED_MEMORY */
4651 		}
4652 		/*
4653 		 * We don't free the address here since all the net's were
4654 		 * freed above.
4655 		 */
4656 		if (control->on_read_q == 0) {
4657 			sctp_free_a_readq(stcb, control);
4658 		}
4659 	}
4660 }
4661 
4662 /*-
4663  * Free the association after un-hashing the remote port. This
4664  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4665  * expect that the input to this function IS a locked TCB.
4666  * It will return 0, if it did NOT destroy the association (instead
4667  * it unlocks it. It will return NON-zero if it either destroyed the
4668  * association OR the association is already destroyed.
4669  */
4670 int
4671 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4672 {
4673 	int i;
4674 	struct sctp_association *asoc;
4675 	struct sctp_nets *net, *nnet;
4676 	struct sctp_laddr *laddr, *naddr;
4677 	struct sctp_tmit_chunk *chk, *nchk;
4678 	struct sctp_asconf_addr *aparam, *naparam;
4679 	struct sctp_asconf_ack *aack, *naack;
4680 	struct sctp_stream_reset_list *strrst, *nstrrst;
4681 	struct sctp_queued_to_read *sq, *nsq;
4682 	struct sctp_stream_queue_pending *sp, *nsp;
4683 	sctp_sharedkey_t *shared_key, *nshared_key;
4684 	struct socket *so;
4685 
4686 	/* first, lets purge the entry from the hash table. */
4687 
4688 #ifdef SCTP_LOG_CLOSING
4689 	sctp_log_closing(inp, stcb, 6);
4690 #endif
4691 	if (stcb->asoc.state == 0) {
4692 #ifdef SCTP_LOG_CLOSING
4693 		sctp_log_closing(inp, NULL, 7);
4694 #endif
4695 		/* there is no asoc, really TSNH :-0 */
4696 		return (1);
4697 	}
4698 	SCTP_TCB_SEND_LOCK(stcb);
4699 	if (stcb->asoc.alternate) {
4700 		sctp_free_remote_addr(stcb->asoc.alternate);
4701 		stcb->asoc.alternate = NULL;
4702 	}
4703 	/* TEMP CODE */
4704 	if (stcb->freed_from_where == 0) {
4705 		/* Only record the first place free happened from */
4706 		stcb->freed_from_where = from_location;
4707 	}
4708 	/* TEMP CODE */
4709 
4710 	asoc = &stcb->asoc;
4711 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4712 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4713 		/* nothing around */
4714 		so = NULL;
4715 	else
4716 		so = inp->sctp_socket;
4717 
4718 	/*
4719 	 * We used timer based freeing if a reader or writer is in the way.
4720 	 * So we first check if we are actually being called from a timer,
4721 	 * if so we abort early if a reader or writer is still in the way.
4722 	 */
4723 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4724 	    (from_inpcbfree == SCTP_NORMAL_PROC)) {
4725 		/*
4726 		 * is it the timer driving us? if so are the reader/writers
4727 		 * gone?
4728 		 */
4729 		if (stcb->asoc.refcnt) {
4730 			/* nope, reader or writer in the way */
4731 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4732 			/* no asoc destroyed */
4733 			SCTP_TCB_SEND_UNLOCK(stcb);
4734 			SCTP_TCB_UNLOCK(stcb);
4735 #ifdef SCTP_LOG_CLOSING
4736 			sctp_log_closing(inp, stcb, 8);
4737 #endif
4738 			return (0);
4739 		}
4740 	}
4741 	/* Now clean up any other timers */
4742 	sctp_stop_association_timers(stcb, false);
4743 	/* Now the read queue needs to be cleaned up (only once) */
4744 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4745 		SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4746 		SCTP_INP_READ_LOCK(inp);
4747 		TAILQ_FOREACH(sq, &inp->read_queue, next) {
4748 			if (sq->stcb == stcb) {
4749 				sq->do_not_ref_stcb = 1;
4750 				sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4751 				/*
4752 				 * If there is no end, there never will be
4753 				 * now.
4754 				 */
4755 				if (sq->end_added == 0) {
4756 					/* Held for PD-API clear that. */
4757 					sq->pdapi_aborted = 1;
4758 					sq->held_length = 0;
4759 					if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4760 						/*
4761 						 * Need to add a PD-API
4762 						 * aborted indication.
4763 						 * Setting the control_pdapi
4764 						 * assures that it will be
4765 						 * added right after this
4766 						 * msg.
4767 						 */
4768 						uint32_t strseq;
4769 
4770 						stcb->asoc.control_pdapi = sq;
4771 						strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4772 						sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4773 						    stcb,
4774 						    SCTP_PARTIAL_DELIVERY_ABORTED,
4775 						    (void *)&strseq,
4776 						    SCTP_SO_LOCKED);
4777 						stcb->asoc.control_pdapi = NULL;
4778 					}
4779 				}
4780 				/* Add an end to wake them */
4781 				sq->end_added = 1;
4782 			}
4783 		}
4784 		SCTP_INP_READ_UNLOCK(inp);
4785 		if (stcb->block_entry) {
4786 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4787 			stcb->block_entry->error = ECONNRESET;
4788 			stcb->block_entry = NULL;
4789 		}
4790 	}
4791 	if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4792 		/*
4793 		 * Someone holds a reference OR the socket is unaccepted
4794 		 * yet.
4795 		 */
4796 		if ((stcb->asoc.refcnt) ||
4797 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4798 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4799 			SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4800 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4801 		}
4802 		SCTP_TCB_SEND_UNLOCK(stcb);
4803 		SCTP_TCB_UNLOCK(stcb);
4804 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4805 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4806 			/* nothing around */
4807 			so = NULL;
4808 		if (so) {
4809 			/* Wake any reader/writers */
4810 			sctp_sorwakeup(inp, so);
4811 			sctp_sowwakeup(inp, so);
4812 		}
4813 
4814 #ifdef SCTP_LOG_CLOSING
4815 		sctp_log_closing(inp, stcb, 9);
4816 #endif
4817 		/* no asoc destroyed */
4818 		return (0);
4819 	}
4820 #ifdef SCTP_LOG_CLOSING
4821 	sctp_log_closing(inp, stcb, 10);
4822 #endif
4823 	/*
4824 	 * When I reach here, no others want to kill the assoc yet.. and I
4825 	 * own the lock. Now its possible an abort comes in when I do the
4826 	 * lock exchange below to grab all the locks to do the final take
4827 	 * out. to prevent this we increment the count, which will start a
4828 	 * timer and blow out above thus assuring us that we hold exclusive
4829 	 * killing of the asoc. Note that after getting back the TCB lock we
4830 	 * will go ahead and increment the counter back up and stop any
4831 	 * timer a passing stranger may have started :-S
4832 	 */
4833 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4834 		atomic_add_int(&stcb->asoc.refcnt, 1);
4835 
4836 		SCTP_TCB_SEND_UNLOCK(stcb);
4837 		SCTP_TCB_UNLOCK(stcb);
4838 		SCTP_INP_INFO_WLOCK();
4839 		SCTP_INP_WLOCK(inp);
4840 		SCTP_TCB_LOCK(stcb);
4841 		SCTP_TCB_SEND_LOCK(stcb);
4842 	}
4843 	/* Double check the GONE flag */
4844 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4845 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4846 		/* nothing around */
4847 		so = NULL;
4848 
4849 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4850 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4851 		/*
4852 		 * For TCP type we need special handling when we are
4853 		 * connected. We also include the peel'ed off ones to.
4854 		 */
4855 		if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4856 			inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4857 			inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4858 			if (so) {
4859 				SOCKBUF_LOCK(&so->so_rcv);
4860 				so->so_state &= ~(SS_ISCONNECTING |
4861 				    SS_ISDISCONNECTING |
4862 				    SS_ISCONFIRMING |
4863 				    SS_ISCONNECTED);
4864 				so->so_state |= SS_ISDISCONNECTED;
4865 				socantrcvmore_locked(so);
4866 				socantsendmore(so);
4867 				sctp_sowwakeup(inp, so);
4868 				sctp_sorwakeup(inp, so);
4869 				SCTP_SOWAKEUP(so);
4870 			}
4871 		}
4872 	}
4873 
4874 	/*
4875 	 * Make it invalid too, that way if its about to run it will abort
4876 	 * and return.
4877 	 */
4878 	/* re-increment the lock */
4879 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4880 		atomic_add_int(&stcb->asoc.refcnt, -1);
4881 	}
4882 	if (stcb->asoc.refcnt) {
4883 		SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4884 		sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4885 		if (from_inpcbfree == SCTP_NORMAL_PROC) {
4886 			SCTP_INP_INFO_WUNLOCK();
4887 			SCTP_INP_WUNLOCK(inp);
4888 		}
4889 		SCTP_TCB_SEND_UNLOCK(stcb);
4890 		SCTP_TCB_UNLOCK(stcb);
4891 		return (0);
4892 	}
4893 	asoc->state = 0;
4894 	if (inp->sctp_tcbhash) {
4895 		LIST_REMOVE(stcb, sctp_tcbhash);
4896 	}
4897 	if (stcb->asoc.in_asocid_hash) {
4898 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4899 	}
4900 	/* Now lets remove it from the list of ALL associations in the EP */
4901 	LIST_REMOVE(stcb, sctp_tcblist);
4902 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4903 		SCTP_INP_INCR_REF(inp);
4904 		SCTP_INP_WUNLOCK(inp);
4905 	}
4906 	/* pull from vtag hash */
4907 	LIST_REMOVE(stcb, sctp_asocs);
4908 	sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4909 	    inp->sctp_lport, stcb->rport);
4910 
4911 	/*
4912 	 * Now restop the timers to be sure this is paranoia at is finest!
4913 	 */
4914 	sctp_stop_association_timers(stcb, true);
4915 
4916 	/*
4917 	 * The chunk lists and such SHOULD be empty but we check them just
4918 	 * in case.
4919 	 */
4920 	/* anything on the wheel needs to be removed */
4921 	for (i = 0; i < asoc->streamoutcnt; i++) {
4922 		struct sctp_stream_out *outs;
4923 
4924 		outs = &asoc->strmout[i];
4925 		/* now clean up any chunks here */
4926 		TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4927 			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4928 			TAILQ_REMOVE(&outs->outqueue, sp, next);
4929 			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4930 			sctp_free_spbufspace(stcb, asoc, sp);
4931 			if (sp->data) {
4932 				if (so) {
4933 					/* Still an open socket - report */
4934 					sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4935 					    0, (void *)sp, SCTP_SO_LOCKED);
4936 				}
4937 				if (sp->data) {
4938 					sctp_m_freem(sp->data);
4939 					sp->data = NULL;
4940 					sp->tail_mbuf = NULL;
4941 					sp->length = 0;
4942 				}
4943 			}
4944 			if (sp->net) {
4945 				sctp_free_remote_addr(sp->net);
4946 				sp->net = NULL;
4947 			}
4948 			sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4949 		}
4950 	}
4951 	/* sa_ignore FREED_MEMORY */
4952 	TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4953 		TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4954 		SCTP_FREE(strrst, SCTP_M_STRESET);
4955 	}
4956 	TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4957 		TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4958 		if (sq->data) {
4959 			sctp_m_freem(sq->data);
4960 			sq->data = NULL;
4961 		}
4962 		sctp_free_remote_addr(sq->whoFrom);
4963 		sq->whoFrom = NULL;
4964 		sq->stcb = NULL;
4965 		/* Free the ctl entry */
4966 		sctp_free_a_readq(stcb, sq);
4967 		/* sa_ignore FREED_MEMORY */
4968 	}
4969 	TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4970 		TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4971 		if (chk->data) {
4972 			sctp_m_freem(chk->data);
4973 			chk->data = NULL;
4974 		}
4975 		if (chk->holds_key_ref)
4976 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4977 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4978 		SCTP_DECR_CHK_COUNT();
4979 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4980 		asoc->free_chunk_cnt--;
4981 		/* sa_ignore FREED_MEMORY */
4982 	}
4983 	/* pending send queue SHOULD be empty */
4984 	TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4985 		if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
4986 			asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
4987 #ifdef INVARIANTS
4988 		} else {
4989 			panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
4990 #endif
4991 		}
4992 		TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4993 		if (chk->data) {
4994 			if (so) {
4995 				/* Still a socket? */
4996 				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4997 				    0, chk, SCTP_SO_LOCKED);
4998 			}
4999 			if (chk->data) {
5000 				sctp_m_freem(chk->data);
5001 				chk->data = NULL;
5002 			}
5003 		}
5004 		if (chk->holds_key_ref)
5005 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5006 		if (chk->whoTo) {
5007 			sctp_free_remote_addr(chk->whoTo);
5008 			chk->whoTo = NULL;
5009 		}
5010 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5011 		SCTP_DECR_CHK_COUNT();
5012 		/* sa_ignore FREED_MEMORY */
5013 	}
5014 	/* sent queue SHOULD be empty */
5015 	TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5016 		if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5017 			if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5018 				asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5019 #ifdef INVARIANTS
5020 			} else {
5021 				panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5022 #endif
5023 			}
5024 		}
5025 		TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5026 		if (chk->data) {
5027 			if (so) {
5028 				/* Still a socket? */
5029 				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5030 				    0, chk, SCTP_SO_LOCKED);
5031 			}
5032 			if (chk->data) {
5033 				sctp_m_freem(chk->data);
5034 				chk->data = NULL;
5035 			}
5036 		}
5037 		if (chk->holds_key_ref)
5038 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5039 		sctp_free_remote_addr(chk->whoTo);
5040 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5041 		SCTP_DECR_CHK_COUNT();
5042 		/* sa_ignore FREED_MEMORY */
5043 	}
5044 #ifdef INVARIANTS
5045 	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5046 		if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5047 			panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5048 		}
5049 	}
5050 #endif
5051 	/* control queue MAY not be empty */
5052 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5053 		TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5054 		if (chk->data) {
5055 			sctp_m_freem(chk->data);
5056 			chk->data = NULL;
5057 		}
5058 		if (chk->holds_key_ref)
5059 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5060 		sctp_free_remote_addr(chk->whoTo);
5061 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5062 		SCTP_DECR_CHK_COUNT();
5063 		/* sa_ignore FREED_MEMORY */
5064 	}
5065 	/* ASCONF queue MAY not be empty */
5066 	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5067 		TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5068 		if (chk->data) {
5069 			sctp_m_freem(chk->data);
5070 			chk->data = NULL;
5071 		}
5072 		if (chk->holds_key_ref)
5073 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5074 		sctp_free_remote_addr(chk->whoTo);
5075 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5076 		SCTP_DECR_CHK_COUNT();
5077 		/* sa_ignore FREED_MEMORY */
5078 	}
5079 	if (asoc->mapping_array) {
5080 		SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5081 		asoc->mapping_array = NULL;
5082 	}
5083 	if (asoc->nr_mapping_array) {
5084 		SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5085 		asoc->nr_mapping_array = NULL;
5086 	}
5087 	/* the stream outs */
5088 	if (asoc->strmout) {
5089 		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5090 		asoc->strmout = NULL;
5091 	}
5092 	asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5093 	if (asoc->strmin) {
5094 		for (i = 0; i < asoc->streamincnt; i++) {
5095 			sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5096 			sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5097 		}
5098 		SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5099 		asoc->strmin = NULL;
5100 	}
5101 	asoc->streamincnt = 0;
5102 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5103 #ifdef INVARIANTS
5104 		if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5105 			panic("no net's left alloc'ed, or list points to itself");
5106 		}
5107 #endif
5108 		TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5109 		sctp_free_remote_addr(net);
5110 	}
5111 	LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5112 		/* sa_ignore FREED_MEMORY */
5113 		sctp_remove_laddr(laddr);
5114 	}
5115 
5116 	/* pending asconf (address) parameters */
5117 	TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5118 		/* sa_ignore FREED_MEMORY */
5119 		TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5120 		SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5121 	}
5122 	TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5123 		/* sa_ignore FREED_MEMORY */
5124 		TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5125 		if (aack->data != NULL) {
5126 			sctp_m_freem(aack->data);
5127 		}
5128 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5129 	}
5130 	/* clean up auth stuff */
5131 	if (asoc->local_hmacs)
5132 		sctp_free_hmaclist(asoc->local_hmacs);
5133 	if (asoc->peer_hmacs)
5134 		sctp_free_hmaclist(asoc->peer_hmacs);
5135 
5136 	if (asoc->local_auth_chunks)
5137 		sctp_free_chunklist(asoc->local_auth_chunks);
5138 	if (asoc->peer_auth_chunks)
5139 		sctp_free_chunklist(asoc->peer_auth_chunks);
5140 
5141 	sctp_free_authinfo(&asoc->authinfo);
5142 
5143 	LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5144 		LIST_REMOVE(shared_key, next);
5145 		sctp_free_sharedkey(shared_key);
5146 		/* sa_ignore FREED_MEMORY */
5147 	}
5148 
5149 	/* Insert new items here :> */
5150 
5151 	/* Get rid of LOCK */
5152 	SCTP_TCB_SEND_UNLOCK(stcb);
5153 	SCTP_TCB_UNLOCK(stcb);
5154 	SCTP_TCB_LOCK_DESTROY(stcb);
5155 	SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5156 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5157 		SCTP_INP_INFO_WUNLOCK();
5158 		SCTP_INP_RLOCK(inp);
5159 	}
5160 #ifdef SCTP_TRACK_FREED_ASOCS
5161 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5162 		/* now clean up the tasoc itself */
5163 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5164 		SCTP_DECR_ASOC_COUNT();
5165 	} else {
5166 		LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5167 	}
5168 #else
5169 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5170 	SCTP_DECR_ASOC_COUNT();
5171 #endif
5172 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5173 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5174 			/*
5175 			 * If its NOT the inp_free calling us AND sctp_close
5176 			 * as been called, we call back...
5177 			 */
5178 			SCTP_INP_RUNLOCK(inp);
5179 			/*
5180 			 * This will start the kill timer (if we are the
5181 			 * last one) since we hold an increment yet. But
5182 			 * this is the only safe way to do this since
5183 			 * otherwise if the socket closes at the same time
5184 			 * we are here we might collide in the cleanup.
5185 			 */
5186 			sctp_inpcb_free(inp,
5187 			    SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5188 			    SCTP_CALLED_DIRECTLY_NOCMPSET);
5189 			SCTP_INP_DECR_REF(inp);
5190 		} else {
5191 			/* The socket is still open. */
5192 			SCTP_INP_DECR_REF(inp);
5193 			SCTP_INP_RUNLOCK(inp);
5194 		}
5195 	}
5196 	/* destroyed the asoc */
5197 #ifdef SCTP_LOG_CLOSING
5198 	sctp_log_closing(inp, NULL, 11);
5199 #endif
5200 	return (1);
5201 }
5202 
5203 /*
5204  * determine if a destination is "reachable" based upon the addresses bound
5205  * to the current endpoint (e.g. only v4 or v6 currently bound)
5206  */
5207 /*
5208  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5209  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5210  * types bound as its endpoint
5211  */
5212 int
5213 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5214 {
5215 	struct sctp_inpcb *inp;
5216 	int answer;
5217 
5218 	/*
5219 	 * No locks here, the TCB, in all cases is already locked and an
5220 	 * assoc is up. There is either a INP lock by the caller applied (in
5221 	 * asconf case when deleting an address) or NOT in the HB case,
5222 	 * however if HB then the INP increment is up and the INP will not
5223 	 * be removed (on top of the fact that we have a TCB lock). So we
5224 	 * only want to read the sctp_flags, which is either bound-all or
5225 	 * not.. no protection needed since once an assoc is up you can't be
5226 	 * changing your binding.
5227 	 */
5228 	inp = stcb->sctp_ep;
5229 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5230 		/* if bound all, destination is not restricted */
5231 		/*
5232 		 * RRS: Question during lock work: Is this correct? If you
5233 		 * are bound-all you still might need to obey the V4--V6
5234 		 * flags??? IMO this bound-all stuff needs to be removed!
5235 		 */
5236 		return (1);
5237 	}
5238 	/* NOTE: all "scope" checks are done when local addresses are added */
5239 	switch (destaddr->sa_family) {
5240 #ifdef INET6
5241 	case AF_INET6:
5242 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5243 		break;
5244 #endif
5245 #ifdef INET
5246 	case AF_INET:
5247 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5248 		break;
5249 #endif
5250 	default:
5251 		/* invalid family, so it's unreachable */
5252 		answer = 0;
5253 		break;
5254 	}
5255 	return (answer);
5256 }
5257 
5258 /*
5259  * update the inp_vflags on an endpoint
5260  */
5261 static void
5262 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5263 {
5264 	struct sctp_laddr *laddr;
5265 
5266 	/* first clear the flag */
5267 	inp->ip_inp.inp.inp_vflag = 0;
5268 	/* set the flag based on addresses on the ep list */
5269 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5270 		if (laddr->ifa == NULL) {
5271 			SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5272 			    __func__);
5273 			continue;
5274 		}
5275 
5276 		if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5277 			continue;
5278 		}
5279 		switch (laddr->ifa->address.sa.sa_family) {
5280 #ifdef INET6
5281 		case AF_INET6:
5282 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5283 			break;
5284 #endif
5285 #ifdef INET
5286 		case AF_INET:
5287 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5288 			break;
5289 #endif
5290 		default:
5291 			break;
5292 		}
5293 	}
5294 }
5295 
5296 /*
5297  * Add the address to the endpoint local address list There is nothing to be
5298  * done if we are bound to all addresses
5299  */
5300 void
5301 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5302 {
5303 	struct sctp_laddr *laddr;
5304 	struct sctp_tcb *stcb;
5305 	int fnd, error = 0;
5306 
5307 	fnd = 0;
5308 
5309 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5310 		/* You are already bound to all. You have it already */
5311 		return;
5312 	}
5313 #ifdef INET6
5314 	if (ifa->address.sa.sa_family == AF_INET6) {
5315 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5316 			/* Can't bind a non-useable addr. */
5317 			return;
5318 		}
5319 	}
5320 #endif
5321 	/* first, is it already present? */
5322 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5323 		if (laddr->ifa == ifa) {
5324 			fnd = 1;
5325 			break;
5326 		}
5327 	}
5328 
5329 	if (fnd == 0) {
5330 		/* Not in the ep list */
5331 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5332 		if (error != 0)
5333 			return;
5334 		inp->laddr_count++;
5335 		/* update inp_vflag flags */
5336 		switch (ifa->address.sa.sa_family) {
5337 #ifdef INET6
5338 		case AF_INET6:
5339 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5340 			break;
5341 #endif
5342 #ifdef INET
5343 		case AF_INET:
5344 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5345 			break;
5346 #endif
5347 		default:
5348 			break;
5349 		}
5350 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5351 			sctp_add_local_addr_restricted(stcb, ifa);
5352 		}
5353 	}
5354 	return;
5355 }
5356 
5357 /*
5358  * select a new (hopefully reachable) destination net (should only be used
5359  * when we deleted an ep addr that is the only usable source address to reach
5360  * the destination net)
5361  */
5362 static void
5363 sctp_select_primary_destination(struct sctp_tcb *stcb)
5364 {
5365 	struct sctp_nets *net;
5366 
5367 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5368 		/* for now, we'll just pick the first reachable one we find */
5369 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5370 			continue;
5371 		if (sctp_destination_is_reachable(stcb,
5372 		    (struct sockaddr *)&net->ro._l_addr)) {
5373 			/* found a reachable destination */
5374 			stcb->asoc.primary_destination = net;
5375 		}
5376 	}
5377 	/* I can't there from here! ...we're gonna die shortly... */
5378 }
5379 
5380 /*
5381  * Delete the address from the endpoint local address list. There is nothing
5382  * to be done if we are bound to all addresses
5383  */
5384 void
5385 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5386 {
5387 	struct sctp_laddr *laddr;
5388 	int fnd;
5389 
5390 	fnd = 0;
5391 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5392 		/* You are already bound to all. You have it already */
5393 		return;
5394 	}
5395 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5396 		if (laddr->ifa == ifa) {
5397 			fnd = 1;
5398 			break;
5399 		}
5400 	}
5401 	if (fnd && (inp->laddr_count < 2)) {
5402 		/* can't delete unless there are at LEAST 2 addresses */
5403 		return;
5404 	}
5405 	if (fnd) {
5406 		/*
5407 		 * clean up any use of this address go through our
5408 		 * associations and clear any last_used_address that match
5409 		 * this one for each assoc, see if a new primary_destination
5410 		 * is needed
5411 		 */
5412 		struct sctp_tcb *stcb;
5413 
5414 		/* clean up "next_addr_touse" */
5415 		if (inp->next_addr_touse == laddr)
5416 			/* delete this address */
5417 			inp->next_addr_touse = NULL;
5418 
5419 		/* clean up "last_used_address" */
5420 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5421 			struct sctp_nets *net;
5422 
5423 			SCTP_TCB_LOCK(stcb);
5424 			if (stcb->asoc.last_used_address == laddr)
5425 				/* delete this address */
5426 				stcb->asoc.last_used_address = NULL;
5427 			/*
5428 			 * Now spin through all the nets and purge any ref
5429 			 * to laddr
5430 			 */
5431 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5432 				if (net->ro._s_addr == laddr->ifa) {
5433 					/* Yep, purge src address selected */
5434 					RO_NHFREE(&net->ro);
5435 					sctp_free_ifa(net->ro._s_addr);
5436 					net->ro._s_addr = NULL;
5437 					net->src_addr_selected = 0;
5438 				}
5439 			}
5440 			SCTP_TCB_UNLOCK(stcb);
5441 		}		/* for each tcb */
5442 		/* remove it from the ep list */
5443 		sctp_remove_laddr(laddr);
5444 		inp->laddr_count--;
5445 		/* update inp_vflag flags */
5446 		sctp_update_ep_vflag(inp);
5447 	}
5448 	return;
5449 }
5450 
5451 /*
5452  * Add the address to the TCB local address restricted list.
5453  * This is a "pending" address list (eg. addresses waiting for an
5454  * ASCONF-ACK response) and cannot be used as a valid source address.
5455  */
5456 void
5457 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5458 {
5459 	struct sctp_laddr *laddr;
5460 	struct sctpladdr *list;
5461 
5462 	/*
5463 	 * Assumes TCB is locked.. and possibly the INP. May need to
5464 	 * confirm/fix that if we need it and is not the case.
5465 	 */
5466 	list = &stcb->asoc.sctp_restricted_addrs;
5467 
5468 #ifdef INET6
5469 	if (ifa->address.sa.sa_family == AF_INET6) {
5470 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5471 			/* Can't bind a non-existent addr. */
5472 			return;
5473 		}
5474 	}
5475 #endif
5476 	/* does the address already exist? */
5477 	LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5478 		if (laddr->ifa == ifa) {
5479 			return;
5480 		}
5481 	}
5482 
5483 	/* add to the list */
5484 	(void)sctp_insert_laddr(list, ifa, 0);
5485 	return;
5486 }
5487 
5488 /*
5489  * Remove a local address from the TCB local address restricted list
5490  */
5491 void
5492 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5493 {
5494 	struct sctp_inpcb *inp;
5495 	struct sctp_laddr *laddr;
5496 
5497 	/*
5498 	 * This is called by asconf work. It is assumed that a) The TCB is
5499 	 * locked and b) The INP is locked. This is true in as much as I can
5500 	 * trace through the entry asconf code where I did these locks.
5501 	 * Again, the ASCONF code is a bit different in that it does lock
5502 	 * the INP during its work often times. This must be since we don't
5503 	 * want other proc's looking up things while what they are looking
5504 	 * up is changing :-D
5505 	 */
5506 
5507 	inp = stcb->sctp_ep;
5508 	/* if subset bound and don't allow ASCONF's, can't delete last */
5509 	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5510 	    sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5511 		if (stcb->sctp_ep->laddr_count < 2) {
5512 			/* can't delete last address */
5513 			return;
5514 		}
5515 	}
5516 	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5517 		/* remove the address if it exists */
5518 		if (laddr->ifa == NULL)
5519 			continue;
5520 		if (laddr->ifa == ifa) {
5521 			sctp_remove_laddr(laddr);
5522 			return;
5523 		}
5524 	}
5525 
5526 	/* address not found! */
5527 	return;
5528 }
5529 
5530 /* sysctl */
5531 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5532 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5533 
5534 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5535 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5536 int *sctp_cpuarry = NULL;
5537 
5538 void
5539 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5540 {
5541 	/* Queue a packet to a processor for the specified core */
5542 	struct sctp_mcore_queue *qent;
5543 	struct sctp_mcore_ctrl *wkq;
5544 	int need_wake = 0;
5545 
5546 	if (sctp_mcore_workers == NULL) {
5547 		/* Something went way bad during setup */
5548 		sctp_input_with_port(m, off, 0);
5549 		return;
5550 	}
5551 	SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5552 	    (sizeof(struct sctp_mcore_queue)),
5553 	    SCTP_M_MCORE);
5554 	if (qent == NULL) {
5555 		/* This is trouble  */
5556 		sctp_input_with_port(m, off, 0);
5557 		return;
5558 	}
5559 	qent->vn = curvnet;
5560 	qent->m = m;
5561 	qent->off = off;
5562 	qent->v6 = 0;
5563 	wkq = &sctp_mcore_workers[cpu_to_use];
5564 	SCTP_MCORE_QLOCK(wkq);
5565 
5566 	TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5567 	if (wkq->running == 0) {
5568 		need_wake = 1;
5569 	}
5570 	SCTP_MCORE_QUNLOCK(wkq);
5571 	if (need_wake) {
5572 		wakeup(&wkq->running);
5573 	}
5574 }
5575 
5576 static void
5577 sctp_mcore_thread(void *arg)
5578 {
5579 
5580 	struct sctp_mcore_ctrl *wkq;
5581 	struct sctp_mcore_queue *qent;
5582 
5583 	wkq = (struct sctp_mcore_ctrl *)arg;
5584 	struct mbuf *m;
5585 	int off, v6;
5586 
5587 	/* Wait for first tickle */
5588 	SCTP_MCORE_LOCK(wkq);
5589 	wkq->running = 0;
5590 	msleep(&wkq->running,
5591 	    &wkq->core_mtx,
5592 	    0, "wait for pkt", 0);
5593 	SCTP_MCORE_UNLOCK(wkq);
5594 
5595 	/* Bind to our cpu */
5596 	thread_lock(curthread);
5597 	sched_bind(curthread, wkq->cpuid);
5598 	thread_unlock(curthread);
5599 
5600 	/* Now lets start working */
5601 	SCTP_MCORE_LOCK(wkq);
5602 	/* Now grab lock and go */
5603 	for (;;) {
5604 		SCTP_MCORE_QLOCK(wkq);
5605 skip_sleep:
5606 		wkq->running = 1;
5607 		qent = TAILQ_FIRST(&wkq->que);
5608 		if (qent) {
5609 			TAILQ_REMOVE(&wkq->que, qent, next);
5610 			SCTP_MCORE_QUNLOCK(wkq);
5611 			CURVNET_SET(qent->vn);
5612 			m = qent->m;
5613 			off = qent->off;
5614 			v6 = qent->v6;
5615 			SCTP_FREE(qent, SCTP_M_MCORE);
5616 			if (v6 == 0) {
5617 				sctp_input_with_port(m, off, 0);
5618 			} else {
5619 				SCTP_PRINTF("V6 not yet supported\n");
5620 				sctp_m_freem(m);
5621 			}
5622 			CURVNET_RESTORE();
5623 			SCTP_MCORE_QLOCK(wkq);
5624 		}
5625 		wkq->running = 0;
5626 		if (!TAILQ_EMPTY(&wkq->que)) {
5627 			goto skip_sleep;
5628 		}
5629 		SCTP_MCORE_QUNLOCK(wkq);
5630 		msleep(&wkq->running,
5631 		    &wkq->core_mtx,
5632 		    0, "wait for pkt", 0);
5633 	}
5634 }
5635 
5636 static void
5637 sctp_startup_mcore_threads(void)
5638 {
5639 	int i, cpu;
5640 
5641 	if (mp_ncpus == 1)
5642 		return;
5643 
5644 	if (sctp_mcore_workers != NULL) {
5645 		/*
5646 		 * Already been here in some previous vnet?
5647 		 */
5648 		return;
5649 	}
5650 	SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5651 	    ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5652 	    SCTP_M_MCORE);
5653 	if (sctp_mcore_workers == NULL) {
5654 		/* TSNH I hope */
5655 		return;
5656 	}
5657 	memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5658 	    sizeof(struct sctp_mcore_ctrl)));
5659 	/* Init the structures */
5660 	for (i = 0; i <= mp_maxid; i++) {
5661 		TAILQ_INIT(&sctp_mcore_workers[i].que);
5662 		SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5663 		SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5664 		sctp_mcore_workers[i].cpuid = i;
5665 	}
5666 	if (sctp_cpuarry == NULL) {
5667 		SCTP_MALLOC(sctp_cpuarry, int *,
5668 		    (mp_ncpus * sizeof(int)),
5669 		    SCTP_M_MCORE);
5670 		i = 0;
5671 		CPU_FOREACH(cpu) {
5672 			sctp_cpuarry[i] = cpu;
5673 			i++;
5674 		}
5675 	}
5676 	/* Now start them all */
5677 	CPU_FOREACH(cpu) {
5678 		(void)kproc_create(sctp_mcore_thread,
5679 		    (void *)&sctp_mcore_workers[cpu],
5680 		    &sctp_mcore_workers[cpu].thread_proc,
5681 		    0,
5682 		    SCTP_KTHREAD_PAGES,
5683 		    SCTP_MCORE_NAME);
5684 	}
5685 }
5686 #endif
5687 
5688 void
5689 sctp_pcb_init(void)
5690 {
5691 	/*
5692 	 * SCTP initialization for the PCB structures should be called by
5693 	 * the sctp_init() function.
5694 	 */
5695 	int i;
5696 	struct timeval tv;
5697 
5698 	if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5699 		/* error I was called twice */
5700 		return;
5701 	}
5702 	SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5703 
5704 #if defined(SCTP_LOCAL_TRACE_BUF)
5705 	memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5706 #endif
5707 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5708 	SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5709 	    ((mp_maxid + 1) * sizeof(struct sctpstat)),
5710 	    SCTP_M_MCORE);
5711 #endif
5712 	(void)SCTP_GETTIME_TIMEVAL(&tv);
5713 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5714 	memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5715 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5716 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5717 #else
5718 	memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5719 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5720 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5721 #endif
5722 	/* init the empty list of (All) Endpoints */
5723 	LIST_INIT(&SCTP_BASE_INFO(listhead));
5724 
5725 	/* init the hash table of endpoints */
5726 	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5727 	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5728 	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5729 	SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5730 	    &SCTP_BASE_INFO(hashasocmark));
5731 	SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5732 	    &SCTP_BASE_INFO(hashmark));
5733 	SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5734 	    &SCTP_BASE_INFO(hashtcpmark));
5735 	SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5736 	SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5737 	    &SCTP_BASE_INFO(hashvrfmark));
5738 
5739 	SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5740 	    &SCTP_BASE_INFO(vrf_ifn_hashmark));
5741 	/* init the zones */
5742 	/*
5743 	 * FIX ME: Should check for NULL returns, but if it does fail we are
5744 	 * doomed to panic anyways... add later maybe.
5745 	 */
5746 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5747 	    sizeof(struct sctp_inpcb), maxsockets);
5748 
5749 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5750 	    sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5751 
5752 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5753 	    sizeof(struct sctp_laddr),
5754 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5755 
5756 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5757 	    sizeof(struct sctp_nets),
5758 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5759 
5760 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5761 	    sizeof(struct sctp_tmit_chunk),
5762 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5763 
5764 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5765 	    sizeof(struct sctp_queued_to_read),
5766 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5767 
5768 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5769 	    sizeof(struct sctp_stream_queue_pending),
5770 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5771 
5772 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5773 	    sizeof(struct sctp_asconf),
5774 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5775 
5776 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5777 	    sizeof(struct sctp_asconf_ack),
5778 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5779 
5780 	/* Master Lock INIT for info structure */
5781 	SCTP_INP_INFO_LOCK_INIT();
5782 	SCTP_STATLOG_INIT_LOCK();
5783 
5784 	SCTP_IPI_COUNT_INIT();
5785 	SCTP_IPI_ADDR_INIT();
5786 #ifdef SCTP_PACKET_LOGGING
5787 	SCTP_IP_PKTLOG_INIT();
5788 #endif
5789 	LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5790 
5791 	SCTP_WQ_ADDR_INIT();
5792 	/* not sure if we need all the counts */
5793 	SCTP_BASE_INFO(ipi_count_ep) = 0;
5794 	/* assoc/tcb zone info */
5795 	SCTP_BASE_INFO(ipi_count_asoc) = 0;
5796 	/* local addrlist zone info */
5797 	SCTP_BASE_INFO(ipi_count_laddr) = 0;
5798 	/* remote addrlist zone info */
5799 	SCTP_BASE_INFO(ipi_count_raddr) = 0;
5800 	/* chunk info */
5801 	SCTP_BASE_INFO(ipi_count_chunk) = 0;
5802 
5803 	/* socket queue zone info */
5804 	SCTP_BASE_INFO(ipi_count_readq) = 0;
5805 
5806 	/* stream out queue cont */
5807 	SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5808 
5809 	SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5810 	SCTP_BASE_INFO(ipi_free_chunks) = 0;
5811 
5812 	SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5813 
5814 	/* Init the TIMEWAIT list */
5815 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5816 		LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5817 	}
5818 	sctp_startup_iterator();
5819 
5820 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5821 	sctp_startup_mcore_threads();
5822 #endif
5823 
5824 	/*
5825 	 * INIT the default VRF which for BSD is the only one, other O/S's
5826 	 * may have more. But initially they must start with one and then
5827 	 * add the VRF's as addresses are added.
5828 	 */
5829 	sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5830 }
5831 
5832 /*
5833  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5834  */
5835 void
5836 sctp_pcb_finish(void)
5837 {
5838 	struct sctp_vrflist *vrf_bucket;
5839 	struct sctp_vrf *vrf, *nvrf;
5840 	struct sctp_ifn *ifn, *nifn;
5841 	struct sctp_ifa *ifa, *nifa;
5842 	struct sctpvtaghead *chain;
5843 	struct sctp_tagblock *twait_block, *prev_twait_block;
5844 	struct sctp_laddr *wi, *nwi;
5845 	int i;
5846 	struct sctp_iterator *it, *nit;
5847 
5848 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5849 		SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5850 		return;
5851 	}
5852 	SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5853 	/*
5854 	 * In FreeBSD the iterator thread never exits but we do clean up.
5855 	 * The only way FreeBSD reaches here is if we have VRF's but we
5856 	 * still add the ifdef to make it compile on old versions.
5857 	 */
5858 retry:
5859 	SCTP_IPI_ITERATOR_WQ_LOCK();
5860 	/*
5861 	 * sctp_iterator_worker() might be working on an it entry without
5862 	 * holding the lock.  We won't find it on the list either and
5863 	 * continue and free/destroy it.  While holding the lock, spin, to
5864 	 * avoid the race condition as sctp_iterator_worker() will have to
5865 	 * wait to re-acquire the lock.
5866 	 */
5867 	if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5868 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
5869 		SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5870 		    "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5871 		DELAY(10);
5872 		goto retry;
5873 	}
5874 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5875 		if (it->vn != curvnet) {
5876 			continue;
5877 		}
5878 		TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5879 		if (it->function_atend != NULL) {
5880 			(*it->function_atend) (it->pointer, it->val);
5881 		}
5882 		SCTP_FREE(it, SCTP_M_ITER);
5883 	}
5884 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
5885 	SCTP_ITERATOR_LOCK();
5886 	if ((sctp_it_ctl.cur_it) &&
5887 	    (sctp_it_ctl.cur_it->vn == curvnet)) {
5888 		sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5889 	}
5890 	SCTP_ITERATOR_UNLOCK();
5891 	SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5892 	SCTP_WQ_ADDR_LOCK();
5893 	LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5894 		LIST_REMOVE(wi, sctp_nxt_addr);
5895 		SCTP_DECR_LADDR_COUNT();
5896 		if (wi->action == SCTP_DEL_IP_ADDRESS) {
5897 			SCTP_FREE(wi->ifa, SCTP_M_IFA);
5898 		}
5899 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5900 	}
5901 	SCTP_WQ_ADDR_UNLOCK();
5902 
5903 	/*
5904 	 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5905 	 * destroyed first).
5906 	 */
5907 	SCTP_IPI_ADDR_WLOCK();
5908 	vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5909 	LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5910 		LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5911 			LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5912 				/* free the ifa */
5913 				LIST_REMOVE(ifa, next_bucket);
5914 				LIST_REMOVE(ifa, next_ifa);
5915 				SCTP_FREE(ifa, SCTP_M_IFA);
5916 			}
5917 			/* free the ifn */
5918 			LIST_REMOVE(ifn, next_bucket);
5919 			LIST_REMOVE(ifn, next_ifn);
5920 			SCTP_FREE(ifn, SCTP_M_IFN);
5921 		}
5922 		SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5923 		/* free the vrf */
5924 		LIST_REMOVE(vrf, next_vrf);
5925 		SCTP_FREE(vrf, SCTP_M_VRF);
5926 	}
5927 	SCTP_IPI_ADDR_WUNLOCK();
5928 	/* free the vrf hashes */
5929 	SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5930 	SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5931 
5932 	/*
5933 	 * free the TIMEWAIT list elements malloc'd in the function
5934 	 * sctp_add_vtag_to_timewait()...
5935 	 */
5936 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5937 		chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5938 		if (!LIST_EMPTY(chain)) {
5939 			prev_twait_block = NULL;
5940 			LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5941 				if (prev_twait_block) {
5942 					SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5943 				}
5944 				prev_twait_block = twait_block;
5945 			}
5946 			SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5947 		}
5948 	}
5949 
5950 	/* free the locks and mutexes */
5951 #ifdef SCTP_PACKET_LOGGING
5952 	SCTP_IP_PKTLOG_DESTROY();
5953 #endif
5954 	SCTP_IPI_ADDR_DESTROY();
5955 	SCTP_STATLOG_DESTROY();
5956 	SCTP_INP_INFO_LOCK_DESTROY();
5957 
5958 	SCTP_WQ_ADDR_DESTROY();
5959 
5960 	/* Get rid of other stuff too. */
5961 	if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5962 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5963 	if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5964 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5965 	if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5966 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5967 
5968 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5969 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5970 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5971 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5972 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5973 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5974 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5975 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5976 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5977 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5978 	SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5979 #endif
5980 }
5981 
5982 int
5983 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5984     int offset, int limit,
5985     struct sockaddr *src, struct sockaddr *dst,
5986     struct sockaddr *altsa, uint16_t port)
5987 {
5988 	/*
5989 	 * grub through the INIT pulling addresses and loading them to the
5990 	 * nets structure in the asoc. The from address in the mbuf should
5991 	 * also be loaded (if it is not already). This routine can be called
5992 	 * with either INIT or INIT-ACK's as long as the m points to the IP
5993 	 * packet and the offset points to the beginning of the parameters.
5994 	 */
5995 	struct sctp_inpcb *inp;
5996 	struct sctp_nets *net, *nnet, *net_tmp;
5997 	struct sctp_paramhdr *phdr, param_buf;
5998 	struct sctp_tcb *stcb_tmp;
5999 	uint16_t ptype, plen;
6000 	struct sockaddr *sa;
6001 	uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6002 	struct sctp_auth_random *p_random = NULL;
6003 	uint16_t random_len = 0;
6004 	uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6005 	struct sctp_auth_hmac_algo *hmacs = NULL;
6006 	uint16_t hmacs_len = 0;
6007 	uint8_t saw_asconf = 0;
6008 	uint8_t saw_asconf_ack = 0;
6009 	uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6010 	struct sctp_auth_chunk_list *chunks = NULL;
6011 	uint16_t num_chunks = 0;
6012 	sctp_key_t *new_key;
6013 	uint32_t keylen;
6014 	int got_random = 0, got_hmacs = 0, got_chklist = 0;
6015 	uint8_t peer_supports_ecn;
6016 	uint8_t peer_supports_prsctp;
6017 	uint8_t peer_supports_auth;
6018 	uint8_t peer_supports_asconf;
6019 	uint8_t peer_supports_asconf_ack;
6020 	uint8_t peer_supports_reconfig;
6021 	uint8_t peer_supports_nrsack;
6022 	uint8_t peer_supports_pktdrop;
6023 	uint8_t peer_supports_idata;
6024 #ifdef INET
6025 	struct sockaddr_in sin;
6026 #endif
6027 #ifdef INET6
6028 	struct sockaddr_in6 sin6;
6029 #endif
6030 
6031 	/* First get the destination address setup too. */
6032 #ifdef INET
6033 	memset(&sin, 0, sizeof(sin));
6034 	sin.sin_family = AF_INET;
6035 	sin.sin_len = sizeof(sin);
6036 	sin.sin_port = stcb->rport;
6037 #endif
6038 #ifdef INET6
6039 	memset(&sin6, 0, sizeof(sin6));
6040 	sin6.sin6_family = AF_INET6;
6041 	sin6.sin6_len = sizeof(struct sockaddr_in6);
6042 	sin6.sin6_port = stcb->rport;
6043 #endif
6044 	if (altsa) {
6045 		sa = altsa;
6046 	} else {
6047 		sa = src;
6048 	}
6049 	peer_supports_idata = 0;
6050 	peer_supports_ecn = 0;
6051 	peer_supports_prsctp = 0;
6052 	peer_supports_auth = 0;
6053 	peer_supports_asconf = 0;
6054 	peer_supports_asconf_ack = 0;
6055 	peer_supports_reconfig = 0;
6056 	peer_supports_nrsack = 0;
6057 	peer_supports_pktdrop = 0;
6058 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6059 		/* mark all addresses that we have currently on the list */
6060 		net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6061 	}
6062 	/* does the source address already exist? if so skip it */
6063 	inp = stcb->sctp_ep;
6064 	atomic_add_int(&stcb->asoc.refcnt, 1);
6065 	stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6066 	atomic_add_int(&stcb->asoc.refcnt, -1);
6067 
6068 	if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6069 		/* we must add the source address */
6070 		/* no scope set here since we have a tcb already. */
6071 		switch (sa->sa_family) {
6072 #ifdef INET
6073 		case AF_INET:
6074 			if (stcb->asoc.scope.ipv4_addr_legal) {
6075 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6076 					return (-1);
6077 				}
6078 			}
6079 			break;
6080 #endif
6081 #ifdef INET6
6082 		case AF_INET6:
6083 			if (stcb->asoc.scope.ipv6_addr_legal) {
6084 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6085 					return (-2);
6086 				}
6087 			}
6088 			break;
6089 #endif
6090 		default:
6091 			break;
6092 		}
6093 	} else {
6094 		if (net_tmp != NULL && stcb_tmp == stcb) {
6095 			net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6096 		} else if (stcb_tmp != stcb) {
6097 			/* It belongs to another association? */
6098 			if (stcb_tmp)
6099 				SCTP_TCB_UNLOCK(stcb_tmp);
6100 			return (-3);
6101 		}
6102 	}
6103 	if (stcb->asoc.state == 0) {
6104 		/* the assoc was freed? */
6105 		return (-4);
6106 	}
6107 	/* now we must go through each of the params. */
6108 	phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6109 	while (phdr) {
6110 		ptype = ntohs(phdr->param_type);
6111 		plen = ntohs(phdr->param_length);
6112 		/*
6113 		 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6114 		 * (uint32_t)ptype, (int)plen);
6115 		 */
6116 		if (offset + plen > limit) {
6117 			break;
6118 		}
6119 		if (plen < sizeof(struct sctp_paramhdr)) {
6120 			break;
6121 		}
6122 #ifdef INET
6123 		if (ptype == SCTP_IPV4_ADDRESS) {
6124 			if (stcb->asoc.scope.ipv4_addr_legal) {
6125 				struct sctp_ipv4addr_param *p4, p4_buf;
6126 
6127 				/* ok get the v4 address and check/add */
6128 				phdr = sctp_get_next_param(m, offset,
6129 				    (struct sctp_paramhdr *)&p4_buf,
6130 				    sizeof(p4_buf));
6131 				if (plen != sizeof(struct sctp_ipv4addr_param) ||
6132 				    phdr == NULL) {
6133 					return (-5);
6134 				}
6135 				p4 = (struct sctp_ipv4addr_param *)phdr;
6136 				sin.sin_addr.s_addr = p4->addr;
6137 				if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6138 					/* Skip multi-cast addresses */
6139 					goto next_param;
6140 				}
6141 				if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6142 				    (sin.sin_addr.s_addr == INADDR_ANY)) {
6143 					goto next_param;
6144 				}
6145 				sa = (struct sockaddr *)&sin;
6146 				inp = stcb->sctp_ep;
6147 				atomic_add_int(&stcb->asoc.refcnt, 1);
6148 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6149 				    dst, stcb);
6150 				atomic_add_int(&stcb->asoc.refcnt, -1);
6151 
6152 				if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6153 				    inp == NULL) {
6154 					/* we must add the source address */
6155 					/*
6156 					 * no scope set since we have a tcb
6157 					 * already
6158 					 */
6159 
6160 					/*
6161 					 * we must validate the state again
6162 					 * here
6163 					 */
6164 			add_it_now:
6165 					if (stcb->asoc.state == 0) {
6166 						/* the assoc was freed? */
6167 						return (-7);
6168 					}
6169 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6170 						return (-8);
6171 					}
6172 				} else if (stcb_tmp == stcb) {
6173 					if (stcb->asoc.state == 0) {
6174 						/* the assoc was freed? */
6175 						return (-10);
6176 					}
6177 					if (net != NULL) {
6178 						/* clear flag */
6179 						net->dest_state &=
6180 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6181 					}
6182 				} else {
6183 					/*
6184 					 * strange, address is in another
6185 					 * assoc? straighten out locks.
6186 					 */
6187 					if (stcb_tmp) {
6188 						if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6189 							struct mbuf *op_err;
6190 							char msg[SCTP_DIAG_INFO_LEN];
6191 
6192 							/*
6193 							 * in setup state we
6194 							 * abort this guy
6195 							 */
6196 							SCTP_SNPRINTF(msg, sizeof(msg),
6197 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6198 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6199 							    msg);
6200 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6201 							    stcb_tmp, op_err,
6202 							    SCTP_SO_NOT_LOCKED);
6203 							goto add_it_now;
6204 						}
6205 						SCTP_TCB_UNLOCK(stcb_tmp);
6206 					}
6207 
6208 					if (stcb->asoc.state == 0) {
6209 						/* the assoc was freed? */
6210 						return (-12);
6211 					}
6212 					return (-13);
6213 				}
6214 			}
6215 		} else
6216 #endif
6217 #ifdef INET6
6218 		if (ptype == SCTP_IPV6_ADDRESS) {
6219 			if (stcb->asoc.scope.ipv6_addr_legal) {
6220 				/* ok get the v6 address and check/add */
6221 				struct sctp_ipv6addr_param *p6, p6_buf;
6222 
6223 				phdr = sctp_get_next_param(m, offset,
6224 				    (struct sctp_paramhdr *)&p6_buf,
6225 				    sizeof(p6_buf));
6226 				if (plen != sizeof(struct sctp_ipv6addr_param) ||
6227 				    phdr == NULL) {
6228 					return (-14);
6229 				}
6230 				p6 = (struct sctp_ipv6addr_param *)phdr;
6231 				memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6232 				    sizeof(p6->addr));
6233 				if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6234 					/* Skip multi-cast addresses */
6235 					goto next_param;
6236 				}
6237 				if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6238 					/*
6239 					 * Link local make no sense without
6240 					 * scope
6241 					 */
6242 					goto next_param;
6243 				}
6244 				sa = (struct sockaddr *)&sin6;
6245 				inp = stcb->sctp_ep;
6246 				atomic_add_int(&stcb->asoc.refcnt, 1);
6247 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6248 				    dst, stcb);
6249 				atomic_add_int(&stcb->asoc.refcnt, -1);
6250 				if (stcb_tmp == NULL &&
6251 				    (inp == stcb->sctp_ep || inp == NULL)) {
6252 					/*
6253 					 * we must validate the state again
6254 					 * here
6255 					 */
6256 			add_it_now6:
6257 					if (stcb->asoc.state == 0) {
6258 						/* the assoc was freed? */
6259 						return (-16);
6260 					}
6261 					/*
6262 					 * we must add the address, no scope
6263 					 * set
6264 					 */
6265 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6266 						return (-17);
6267 					}
6268 				} else if (stcb_tmp == stcb) {
6269 					/*
6270 					 * we must validate the state again
6271 					 * here
6272 					 */
6273 					if (stcb->asoc.state == 0) {
6274 						/* the assoc was freed? */
6275 						return (-19);
6276 					}
6277 					if (net != NULL) {
6278 						/* clear flag */
6279 						net->dest_state &=
6280 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6281 					}
6282 				} else {
6283 					/*
6284 					 * strange, address is in another
6285 					 * assoc? straighten out locks.
6286 					 */
6287 					if (stcb_tmp) {
6288 						if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6289 							struct mbuf *op_err;
6290 							char msg[SCTP_DIAG_INFO_LEN];
6291 
6292 							/*
6293 							 * in setup state we
6294 							 * abort this guy
6295 							 */
6296 							SCTP_SNPRINTF(msg, sizeof(msg),
6297 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6298 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6299 							    msg);
6300 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6301 							    stcb_tmp, op_err,
6302 							    SCTP_SO_NOT_LOCKED);
6303 							goto add_it_now6;
6304 						}
6305 						SCTP_TCB_UNLOCK(stcb_tmp);
6306 					}
6307 					if (stcb->asoc.state == 0) {
6308 						/* the assoc was freed? */
6309 						return (-21);
6310 					}
6311 					return (-22);
6312 				}
6313 			}
6314 		} else
6315 #endif
6316 		if (ptype == SCTP_ECN_CAPABLE) {
6317 			peer_supports_ecn = 1;
6318 		} else if (ptype == SCTP_ULP_ADAPTATION) {
6319 			if (stcb->asoc.state != SCTP_STATE_OPEN) {
6320 				struct sctp_adaptation_layer_indication ai,
6321 				                                *aip;
6322 
6323 				phdr = sctp_get_next_param(m, offset,
6324 				    (struct sctp_paramhdr *)&ai, sizeof(ai));
6325 				aip = (struct sctp_adaptation_layer_indication *)phdr;
6326 				if (aip) {
6327 					stcb->asoc.peers_adaptation = ntohl(aip->indication);
6328 					stcb->asoc.adaptation_needed = 1;
6329 				}
6330 			}
6331 		} else if (ptype == SCTP_SET_PRIM_ADDR) {
6332 			struct sctp_asconf_addr_param lstore, *fee;
6333 			int lptype;
6334 			struct sockaddr *lsa = NULL;
6335 #ifdef INET
6336 			struct sctp_asconf_addrv4_param *fii;
6337 #endif
6338 
6339 			if (stcb->asoc.asconf_supported == 0) {
6340 				return (-100);
6341 			}
6342 			if (plen > sizeof(lstore)) {
6343 				return (-23);
6344 			}
6345 			if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6346 				return (-101);
6347 			}
6348 			phdr = sctp_get_next_param(m, offset,
6349 			    (struct sctp_paramhdr *)&lstore,
6350 			    plen);
6351 			if (phdr == NULL) {
6352 				return (-24);
6353 			}
6354 			fee = (struct sctp_asconf_addr_param *)phdr;
6355 			lptype = ntohs(fee->addrp.ph.param_type);
6356 			switch (lptype) {
6357 #ifdef INET
6358 			case SCTP_IPV4_ADDRESS:
6359 				if (plen !=
6360 				    sizeof(struct sctp_asconf_addrv4_param)) {
6361 					SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6362 					    (int)sizeof(struct sctp_asconf_addrv4_param),
6363 					    plen);
6364 				} else {
6365 					fii = (struct sctp_asconf_addrv4_param *)fee;
6366 					sin.sin_addr.s_addr = fii->addrp.addr;
6367 					lsa = (struct sockaddr *)&sin;
6368 				}
6369 				break;
6370 #endif
6371 #ifdef INET6
6372 			case SCTP_IPV6_ADDRESS:
6373 				if (plen !=
6374 				    sizeof(struct sctp_asconf_addr_param)) {
6375 					SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6376 					    (int)sizeof(struct sctp_asconf_addr_param),
6377 					    plen);
6378 				} else {
6379 					memcpy(sin6.sin6_addr.s6_addr,
6380 					    fee->addrp.addr,
6381 					    sizeof(fee->addrp.addr));
6382 					lsa = (struct sockaddr *)&sin6;
6383 				}
6384 				break;
6385 #endif
6386 			default:
6387 				break;
6388 			}
6389 			if (lsa) {
6390 				(void)sctp_set_primary_addr(stcb, sa, NULL);
6391 			}
6392 		} else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6393 			stcb->asoc.peer_supports_nat = 1;
6394 		} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6395 			/* Peer supports pr-sctp */
6396 			peer_supports_prsctp = 1;
6397 		} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6398 			/* A supported extension chunk */
6399 			struct sctp_supported_chunk_types_param *pr_supported;
6400 			uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6401 			int num_ent, i;
6402 
6403 			if (plen > sizeof(local_store)) {
6404 				return (-35);
6405 			}
6406 			phdr = sctp_get_next_param(m, offset,
6407 			    (struct sctp_paramhdr *)&local_store, plen);
6408 			if (phdr == NULL) {
6409 				return (-25);
6410 			}
6411 			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6412 			num_ent = plen - sizeof(struct sctp_paramhdr);
6413 			for (i = 0; i < num_ent; i++) {
6414 				switch (pr_supported->chunk_types[i]) {
6415 				case SCTP_ASCONF:
6416 					peer_supports_asconf = 1;
6417 					break;
6418 				case SCTP_ASCONF_ACK:
6419 					peer_supports_asconf_ack = 1;
6420 					break;
6421 				case SCTP_FORWARD_CUM_TSN:
6422 					peer_supports_prsctp = 1;
6423 					break;
6424 				case SCTP_PACKET_DROPPED:
6425 					peer_supports_pktdrop = 1;
6426 					break;
6427 				case SCTP_NR_SELECTIVE_ACK:
6428 					peer_supports_nrsack = 1;
6429 					break;
6430 				case SCTP_STREAM_RESET:
6431 					peer_supports_reconfig = 1;
6432 					break;
6433 				case SCTP_AUTHENTICATION:
6434 					peer_supports_auth = 1;
6435 					break;
6436 				case SCTP_IDATA:
6437 					peer_supports_idata = 1;
6438 					break;
6439 				default:
6440 					/* one I have not learned yet */
6441 					break;
6442 				}
6443 			}
6444 		} else if (ptype == SCTP_RANDOM) {
6445 			if (plen > sizeof(random_store))
6446 				break;
6447 			if (got_random) {
6448 				/* already processed a RANDOM */
6449 				goto next_param;
6450 			}
6451 			phdr = sctp_get_next_param(m, offset,
6452 			    (struct sctp_paramhdr *)random_store,
6453 			    plen);
6454 			if (phdr == NULL)
6455 				return (-26);
6456 			p_random = (struct sctp_auth_random *)phdr;
6457 			random_len = plen - sizeof(*p_random);
6458 			/* enforce the random length */
6459 			if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6460 				SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6461 				return (-27);
6462 			}
6463 			got_random = 1;
6464 		} else if (ptype == SCTP_HMAC_LIST) {
6465 			uint16_t num_hmacs;
6466 			uint16_t i;
6467 
6468 			if (plen > sizeof(hmacs_store))
6469 				break;
6470 			if (got_hmacs) {
6471 				/* already processed a HMAC list */
6472 				goto next_param;
6473 			}
6474 			phdr = sctp_get_next_param(m, offset,
6475 			    (struct sctp_paramhdr *)hmacs_store,
6476 			    plen);
6477 			if (phdr == NULL)
6478 				return (-28);
6479 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
6480 			hmacs_len = plen - sizeof(*hmacs);
6481 			num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6482 			/* validate the hmac list */
6483 			if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6484 				return (-29);
6485 			}
6486 			if (stcb->asoc.peer_hmacs != NULL)
6487 				sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6488 			stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6489 			if (stcb->asoc.peer_hmacs != NULL) {
6490 				for (i = 0; i < num_hmacs; i++) {
6491 					(void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6492 					    ntohs(hmacs->hmac_ids[i]));
6493 				}
6494 			}
6495 			got_hmacs = 1;
6496 		} else if (ptype == SCTP_CHUNK_LIST) {
6497 			int i;
6498 
6499 			if (plen > sizeof(chunks_store))
6500 				break;
6501 			if (got_chklist) {
6502 				/* already processed a Chunks list */
6503 				goto next_param;
6504 			}
6505 			phdr = sctp_get_next_param(m, offset,
6506 			    (struct sctp_paramhdr *)chunks_store,
6507 			    plen);
6508 			if (phdr == NULL)
6509 				return (-30);
6510 			chunks = (struct sctp_auth_chunk_list *)phdr;
6511 			num_chunks = plen - sizeof(*chunks);
6512 			if (stcb->asoc.peer_auth_chunks != NULL)
6513 				sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6514 			else
6515 				stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6516 			for (i = 0; i < num_chunks; i++) {
6517 				(void)sctp_auth_add_chunk(chunks->chunk_types[i],
6518 				    stcb->asoc.peer_auth_chunks);
6519 				/* record asconf/asconf-ack if listed */
6520 				if (chunks->chunk_types[i] == SCTP_ASCONF)
6521 					saw_asconf = 1;
6522 				if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6523 					saw_asconf_ack = 1;
6524 			}
6525 			got_chklist = 1;
6526 		} else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6527 			    (ptype == SCTP_STATE_COOKIE) ||
6528 			    (ptype == SCTP_UNRECOG_PARAM) ||
6529 			    (ptype == SCTP_COOKIE_PRESERVE) ||
6530 			    (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6531 			    (ptype == SCTP_ADD_IP_ADDRESS) ||
6532 			    (ptype == SCTP_DEL_IP_ADDRESS) ||
6533 			    (ptype == SCTP_ERROR_CAUSE_IND) ||
6534 		    (ptype == SCTP_SUCCESS_REPORT)) {
6535 			/* don't care */
6536 		} else {
6537 			if ((ptype & 0x8000) == 0x0000) {
6538 				/*
6539 				 * must stop processing the rest of the
6540 				 * param's. Any report bits were handled
6541 				 * with the call to
6542 				 * sctp_arethere_unrecognized_parameters()
6543 				 * when the INIT or INIT-ACK was first seen.
6544 				 */
6545 				break;
6546 			}
6547 		}
6548 
6549 next_param:
6550 		offset += SCTP_SIZE32(plen);
6551 		if (offset >= limit) {
6552 			break;
6553 		}
6554 		phdr = sctp_get_next_param(m, offset, &param_buf,
6555 		    sizeof(param_buf));
6556 	}
6557 	/* Now check to see if we need to purge any addresses */
6558 	TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6559 		if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6560 		    SCTP_ADDR_NOT_IN_ASSOC) {
6561 			/* This address has been removed from the asoc */
6562 			/* remove and free it */
6563 			stcb->asoc.numnets--;
6564 			TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6565 			if (net == stcb->asoc.alternate) {
6566 				sctp_free_remote_addr(stcb->asoc.alternate);
6567 				stcb->asoc.alternate = NULL;
6568 			}
6569 			if (net == stcb->asoc.primary_destination) {
6570 				stcb->asoc.primary_destination = NULL;
6571 				sctp_select_primary_destination(stcb);
6572 			}
6573 			sctp_free_remote_addr(net);
6574 		}
6575 	}
6576 	if ((stcb->asoc.ecn_supported == 1) &&
6577 	    (peer_supports_ecn == 0)) {
6578 		stcb->asoc.ecn_supported = 0;
6579 	}
6580 	if ((stcb->asoc.prsctp_supported == 1) &&
6581 	    (peer_supports_prsctp == 0)) {
6582 		stcb->asoc.prsctp_supported = 0;
6583 	}
6584 	if ((stcb->asoc.auth_supported == 1) &&
6585 	    ((peer_supports_auth == 0) ||
6586 	    (got_random == 0) || (got_hmacs == 0))) {
6587 		stcb->asoc.auth_supported = 0;
6588 	}
6589 	if ((stcb->asoc.asconf_supported == 1) &&
6590 	    ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6591 	    (stcb->asoc.auth_supported == 0) ||
6592 	    (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6593 		stcb->asoc.asconf_supported = 0;
6594 	}
6595 	if ((stcb->asoc.reconfig_supported == 1) &&
6596 	    (peer_supports_reconfig == 0)) {
6597 		stcb->asoc.reconfig_supported = 0;
6598 	}
6599 	if ((stcb->asoc.idata_supported == 1) &&
6600 	    (peer_supports_idata == 0)) {
6601 		stcb->asoc.idata_supported = 0;
6602 	}
6603 	if ((stcb->asoc.nrsack_supported == 1) &&
6604 	    (peer_supports_nrsack == 0)) {
6605 		stcb->asoc.nrsack_supported = 0;
6606 	}
6607 	if ((stcb->asoc.pktdrop_supported == 1) &&
6608 	    (peer_supports_pktdrop == 0)) {
6609 		stcb->asoc.pktdrop_supported = 0;
6610 	}
6611 	/* validate authentication required parameters */
6612 	if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6613 		/* peer does not support auth but sent a chunks list? */
6614 		return (-31);
6615 	}
6616 	if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6617 		/* peer supports asconf but not auth? */
6618 		return (-32);
6619 	} else if ((peer_supports_asconf == 1) &&
6620 		    (peer_supports_auth == 1) &&
6621 	    ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6622 		return (-33);
6623 	}
6624 	/* concatenate the full random key */
6625 	keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6626 	if (chunks != NULL) {
6627 		keylen += sizeof(*chunks) + num_chunks;
6628 	}
6629 	new_key = sctp_alloc_key(keylen);
6630 	if (new_key != NULL) {
6631 		/* copy in the RANDOM */
6632 		if (p_random != NULL) {
6633 			keylen = sizeof(*p_random) + random_len;
6634 			memcpy(new_key->key, p_random, keylen);
6635 		} else {
6636 			keylen = 0;
6637 		}
6638 		/* append in the AUTH chunks */
6639 		if (chunks != NULL) {
6640 			memcpy(new_key->key + keylen, chunks,
6641 			    sizeof(*chunks) + num_chunks);
6642 			keylen += sizeof(*chunks) + num_chunks;
6643 		}
6644 		/* append in the HMACs */
6645 		if (hmacs != NULL) {
6646 			memcpy(new_key->key + keylen, hmacs,
6647 			    sizeof(*hmacs) + hmacs_len);
6648 		}
6649 	} else {
6650 		/* failed to get memory for the key */
6651 		return (-34);
6652 	}
6653 	if (stcb->asoc.authinfo.peer_random != NULL)
6654 		sctp_free_key(stcb->asoc.authinfo.peer_random);
6655 	stcb->asoc.authinfo.peer_random = new_key;
6656 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6657 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6658 
6659 	return (0);
6660 }
6661 
6662 int
6663 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6664     struct sctp_nets *net)
6665 {
6666 	/* make sure the requested primary address exists in the assoc */
6667 	if (net == NULL && sa)
6668 		net = sctp_findnet(stcb, sa);
6669 
6670 	if (net == NULL) {
6671 		/* didn't find the requested primary address! */
6672 		return (-1);
6673 	} else {
6674 		/* set the primary address */
6675 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6676 			/* Must be confirmed, so queue to set */
6677 			net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6678 			return (0);
6679 		}
6680 		stcb->asoc.primary_destination = net;
6681 		if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6682 			sctp_free_remote_addr(stcb->asoc.alternate);
6683 			stcb->asoc.alternate = NULL;
6684 		}
6685 		net = TAILQ_FIRST(&stcb->asoc.nets);
6686 		if (net != stcb->asoc.primary_destination) {
6687 			/*
6688 			 * first one on the list is NOT the primary
6689 			 * sctp_cmpaddr() is much more efficient if the
6690 			 * primary is the first on the list, make it so.
6691 			 */
6692 			TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6693 			TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6694 		}
6695 		return (0);
6696 	}
6697 }
6698 
6699 int
6700 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6701 {
6702 	/*
6703 	 * This function serves two purposes. It will see if a TAG can be
6704 	 * re-used and return 1 for yes it is ok and 0 for don't use that
6705 	 * tag. A secondary function it will do is purge out old tags that
6706 	 * can be removed.
6707 	 */
6708 	struct sctpvtaghead *chain;
6709 	struct sctp_tagblock *twait_block;
6710 	struct sctpasochead *head;
6711 	struct sctp_tcb *stcb;
6712 	int i;
6713 
6714 	SCTP_INP_INFO_RLOCK();
6715 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6716 	    SCTP_BASE_INFO(hashasocmark))];
6717 	LIST_FOREACH(stcb, head, sctp_asocs) {
6718 		/*
6719 		 * We choose not to lock anything here. TCB's can't be
6720 		 * removed since we have the read lock, so they can't be
6721 		 * freed on us, same thing for the INP. I may be wrong with
6722 		 * this assumption, but we will go with it for now :-)
6723 		 */
6724 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6725 			continue;
6726 		}
6727 		if (stcb->asoc.my_vtag == tag) {
6728 			/* candidate */
6729 			if (stcb->rport != rport) {
6730 				continue;
6731 			}
6732 			if (stcb->sctp_ep->sctp_lport != lport) {
6733 				continue;
6734 			}
6735 			/* Its a used tag set */
6736 			SCTP_INP_INFO_RUNLOCK();
6737 			return (0);
6738 		}
6739 	}
6740 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6741 	/* Now what about timed wait ? */
6742 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6743 		/*
6744 		 * Block(s) are present, lets see if we have this tag in the
6745 		 * list
6746 		 */
6747 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6748 			if (twait_block->vtag_block[i].v_tag == 0) {
6749 				/* not used */
6750 				continue;
6751 			} else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6752 			    now->tv_sec) {
6753 				/* Audit expires this guy */
6754 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
6755 				twait_block->vtag_block[i].v_tag = 0;
6756 				twait_block->vtag_block[i].lport = 0;
6757 				twait_block->vtag_block[i].rport = 0;
6758 			} else if ((twait_block->vtag_block[i].v_tag == tag) &&
6759 				    (twait_block->vtag_block[i].lport == lport) &&
6760 			    (twait_block->vtag_block[i].rport == rport)) {
6761 				/* Bad tag, sorry :< */
6762 				SCTP_INP_INFO_RUNLOCK();
6763 				return (0);
6764 			}
6765 		}
6766 	}
6767 	SCTP_INP_INFO_RUNLOCK();
6768 	return (1);
6769 }
6770 
6771 static void
6772 sctp_drain_mbufs(struct sctp_tcb *stcb)
6773 {
6774 	/*
6775 	 * We must hunt this association for MBUF's past the cumack (i.e.
6776 	 * out of order data that we can renege on).
6777 	 */
6778 	struct sctp_association *asoc;
6779 	struct sctp_tmit_chunk *chk, *nchk;
6780 	uint32_t cumulative_tsn_p1;
6781 	struct sctp_queued_to_read *control, *ncontrol;
6782 	int cnt, strmat;
6783 	uint32_t gap, i;
6784 	int fnd = 0;
6785 
6786 	/* We look for anything larger than the cum-ack + 1 */
6787 
6788 	asoc = &stcb->asoc;
6789 	if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6790 		/* none we can reneg on. */
6791 		return;
6792 	}
6793 	SCTP_STAT_INCR(sctps_protocol_drains_done);
6794 	cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6795 	cnt = 0;
6796 	/* Ok that was fun, now we will drain all the inbound streams? */
6797 	for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6798 		TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6799 #ifdef INVARIANTS
6800 			if (control->on_strm_q != SCTP_ON_ORDERED) {
6801 				panic("Huh control: %p on_q: %d -- not ordered?",
6802 				    control, control->on_strm_q);
6803 			}
6804 #endif
6805 			if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6806 				/* Yep it is above cum-ack */
6807 				cnt++;
6808 				SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6809 				KASSERT(control->length > 0, ("control has zero length"));
6810 				if (asoc->size_on_all_streams >= control->length) {
6811 					asoc->size_on_all_streams -= control->length;
6812 				} else {
6813 #ifdef INVARIANTS
6814 					panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6815 #else
6816 					asoc->size_on_all_streams = 0;
6817 #endif
6818 				}
6819 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6820 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6821 				if (control->on_read_q) {
6822 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6823 					control->on_read_q = 0;
6824 				}
6825 				TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6826 				control->on_strm_q = 0;
6827 				if (control->data) {
6828 					sctp_m_freem(control->data);
6829 					control->data = NULL;
6830 				}
6831 				sctp_free_remote_addr(control->whoFrom);
6832 				/* Now its reasm? */
6833 				TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6834 					cnt++;
6835 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6836 					KASSERT(chk->send_size > 0, ("chunk has zero length"));
6837 					if (asoc->size_on_reasm_queue >= chk->send_size) {
6838 						asoc->size_on_reasm_queue -= chk->send_size;
6839 					} else {
6840 #ifdef INVARIANTS
6841 						panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6842 #else
6843 						asoc->size_on_reasm_queue = 0;
6844 #endif
6845 					}
6846 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6847 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6848 					TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6849 					if (chk->data) {
6850 						sctp_m_freem(chk->data);
6851 						chk->data = NULL;
6852 					}
6853 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6854 				}
6855 				sctp_free_a_readq(stcb, control);
6856 			}
6857 		}
6858 		TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6859 #ifdef INVARIANTS
6860 			if (control->on_strm_q != SCTP_ON_UNORDERED) {
6861 				panic("Huh control: %p on_q: %d -- not unordered?",
6862 				    control, control->on_strm_q);
6863 			}
6864 #endif
6865 			if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6866 				/* Yep it is above cum-ack */
6867 				cnt++;
6868 				SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6869 				KASSERT(control->length > 0, ("control has zero length"));
6870 				if (asoc->size_on_all_streams >= control->length) {
6871 					asoc->size_on_all_streams -= control->length;
6872 				} else {
6873 #ifdef INVARIANTS
6874 					panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6875 #else
6876 					asoc->size_on_all_streams = 0;
6877 #endif
6878 				}
6879 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6880 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6881 				if (control->on_read_q) {
6882 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6883 					control->on_read_q = 0;
6884 				}
6885 				TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6886 				control->on_strm_q = 0;
6887 				if (control->data) {
6888 					sctp_m_freem(control->data);
6889 					control->data = NULL;
6890 				}
6891 				sctp_free_remote_addr(control->whoFrom);
6892 				/* Now its reasm? */
6893 				TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6894 					cnt++;
6895 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6896 					KASSERT(chk->send_size > 0, ("chunk has zero length"));
6897 					if (asoc->size_on_reasm_queue >= chk->send_size) {
6898 						asoc->size_on_reasm_queue -= chk->send_size;
6899 					} else {
6900 #ifdef INVARIANTS
6901 						panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6902 #else
6903 						asoc->size_on_reasm_queue = 0;
6904 #endif
6905 					}
6906 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6907 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6908 					TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6909 					if (chk->data) {
6910 						sctp_m_freem(chk->data);
6911 						chk->data = NULL;
6912 					}
6913 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6914 				}
6915 				sctp_free_a_readq(stcb, control);
6916 			}
6917 		}
6918 	}
6919 	if (cnt) {
6920 		/* We must back down to see what the new highest is */
6921 		for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6922 			SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6923 			if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6924 				asoc->highest_tsn_inside_map = i;
6925 				fnd = 1;
6926 				break;
6927 			}
6928 		}
6929 		if (!fnd) {
6930 			asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6931 		}
6932 
6933 		/*
6934 		 * Question, should we go through the delivery queue? The
6935 		 * only reason things are on here is the app not reading OR
6936 		 * a p-d-api up. An attacker COULD send enough in to
6937 		 * initiate the PD-API and then send a bunch of stuff to
6938 		 * other streams... these would wind up on the delivery
6939 		 * queue.. and then we would not get to them. But in order
6940 		 * to do this I then have to back-track and un-deliver
6941 		 * sequence numbers in streams.. el-yucko. I think for now
6942 		 * we will NOT look at the delivery queue and leave it to be
6943 		 * something to consider later. An alternative would be to
6944 		 * abort the P-D-API with a notification and then deliver
6945 		 * the data.... Or another method might be to keep track of
6946 		 * how many times the situation occurs and if we see a
6947 		 * possible attack underway just abort the association.
6948 		 */
6949 #ifdef SCTP_DEBUG
6950 		SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6951 #endif
6952 		/*
6953 		 * Now do we need to find a new
6954 		 * asoc->highest_tsn_inside_map?
6955 		 */
6956 		asoc->last_revoke_count = cnt;
6957 		sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6958 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6959 		/* sa_ignore NO_NULL_CHK */
6960 		sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6961 		sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6962 	}
6963 	/*
6964 	 * Another issue, in un-setting the TSN's in the mapping array we
6965 	 * DID NOT adjust the highest_tsn marker.  This will cause one of
6966 	 * two things to occur. It may cause us to do extra work in checking
6967 	 * for our mapping array movement. More importantly it may cause us
6968 	 * to SACK every datagram. This may not be a bad thing though since
6969 	 * we will recover once we get our cum-ack above and all this stuff
6970 	 * we dumped recovered.
6971 	 */
6972 }
6973 
6974 void
6975 sctp_drain()
6976 {
6977 	/*
6978 	 * We must walk the PCB lists for ALL associations here. The system
6979 	 * is LOW on MBUF's and needs help. This is where reneging will
6980 	 * occur. We really hope this does NOT happen!
6981 	 */
6982 	VNET_ITERATOR_DECL(vnet_iter);
6983 	VNET_LIST_RLOCK_NOSLEEP();
6984 	VNET_FOREACH(vnet_iter) {
6985 		CURVNET_SET(vnet_iter);
6986 		struct sctp_inpcb *inp;
6987 		struct sctp_tcb *stcb;
6988 
6989 		SCTP_STAT_INCR(sctps_protocol_drain_calls);
6990 		if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6991 #ifdef VIMAGE
6992 			continue;
6993 #else
6994 			return;
6995 #endif
6996 		}
6997 		SCTP_INP_INFO_RLOCK();
6998 		LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6999 			/* For each endpoint */
7000 			SCTP_INP_RLOCK(inp);
7001 			LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7002 				/* For each association */
7003 				SCTP_TCB_LOCK(stcb);
7004 				sctp_drain_mbufs(stcb);
7005 				SCTP_TCB_UNLOCK(stcb);
7006 			}
7007 			SCTP_INP_RUNLOCK(inp);
7008 		}
7009 		SCTP_INP_INFO_RUNLOCK();
7010 		CURVNET_RESTORE();
7011 	}
7012 	VNET_LIST_RUNLOCK_NOSLEEP();
7013 }
7014 
7015 /*
7016  * start a new iterator
7017  * iterates through all endpoints and associations based on the pcb_state
7018  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7019  * assocs and "ef" (optional) is executed when the iterator completes.
7020  * "inpf" (optional) is executed for each new endpoint as it is being
7021  * iterated through. inpe (optional) is called when the inp completes
7022  * its way through all the stcbs.
7023  */
7024 int
7025 sctp_initiate_iterator(inp_func inpf,
7026     asoc_func af,
7027     inp_func inpe,
7028     uint32_t pcb_state,
7029     uint32_t pcb_features,
7030     uint32_t asoc_state,
7031     void *argp,
7032     uint32_t argi,
7033     end_func ef,
7034     struct sctp_inpcb *s_inp,
7035     uint8_t chunk_output_off)
7036 {
7037 	struct sctp_iterator *it = NULL;
7038 
7039 	if (af == NULL) {
7040 		return (-1);
7041 	}
7042 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7043 		SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7044 		    SCTP_BASE_VAR(sctp_pcb_initialized));
7045 		return (-1);
7046 	}
7047 	SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7048 	    SCTP_M_ITER);
7049 	if (it == NULL) {
7050 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7051 		return (-1);
7052 	}
7053 	memset(it, 0, sizeof(*it));
7054 	it->function_assoc = af;
7055 	it->function_inp = inpf;
7056 	if (inpf)
7057 		it->done_current_ep = 0;
7058 	else
7059 		it->done_current_ep = 1;
7060 	it->function_atend = ef;
7061 	it->pointer = argp;
7062 	it->val = argi;
7063 	it->pcb_flags = pcb_state;
7064 	it->pcb_features = pcb_features;
7065 	it->asoc_state = asoc_state;
7066 	it->function_inp_end = inpe;
7067 	it->no_chunk_output = chunk_output_off;
7068 	it->vn = curvnet;
7069 	if (s_inp) {
7070 		/* Assume lock is held here */
7071 		it->inp = s_inp;
7072 		SCTP_INP_INCR_REF(it->inp);
7073 		it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7074 	} else {
7075 		SCTP_INP_INFO_RLOCK();
7076 		it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7077 		if (it->inp) {
7078 			SCTP_INP_INCR_REF(it->inp);
7079 		}
7080 		SCTP_INP_INFO_RUNLOCK();
7081 		it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7082 	}
7083 	SCTP_IPI_ITERATOR_WQ_LOCK();
7084 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7085 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
7086 		SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7087 		    SCTP_BASE_VAR(sctp_pcb_initialized), it);
7088 		SCTP_FREE(it, SCTP_M_ITER);
7089 		return (-1);
7090 	}
7091 	TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7092 	if (sctp_it_ctl.iterator_running == 0) {
7093 		sctp_wakeup_iterator();
7094 	}
7095 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
7096 	/* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7097 	return (0);
7098 }
7099