xref: /freebsd/sys/netinet/sctp_pcb.c (revision b406897911ea6c18c401907a076c4642dac46127)
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->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1550 		SCTP_PRINTF("TSNH ep_associd0\n");
1551 		return (NULL);
1552 	}
1553 	id = (uint32_t)asoc_id;
1554 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1555 	if (head == NULL) {
1556 		/* invalid id TSNH */
1557 		SCTP_PRINTF("TSNH ep_associd1\n");
1558 		return (NULL);
1559 	}
1560 	LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1561 		if (stcb->asoc.assoc_id == id) {
1562 			if (inp != stcb->sctp_ep) {
1563 				/*
1564 				 * some other guy has the same id active (id
1565 				 * collision ??).
1566 				 */
1567 				SCTP_PRINTF("TSNH ep_associd2\n");
1568 				continue;
1569 			}
1570 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1571 				continue;
1572 			}
1573 			if (want_lock) {
1574 				SCTP_TCB_LOCK(stcb);
1575 			}
1576 			return (stcb);
1577 		}
1578 	}
1579 	return (NULL);
1580 }
1581 
1582 struct sctp_tcb *
1583 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1584 {
1585 	struct sctp_tcb *stcb;
1586 
1587 	SCTP_INP_RLOCK(inp);
1588 	stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1589 	SCTP_INP_RUNLOCK(inp);
1590 	return (stcb);
1591 }
1592 
1593 /*
1594  * Endpoint probe expects that the INP_INFO is locked.
1595  */
1596 static struct sctp_inpcb *
1597 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1598     uint16_t lport, uint32_t vrf_id)
1599 {
1600 	struct sctp_inpcb *inp;
1601 	struct sctp_laddr *laddr;
1602 #ifdef INET
1603 	struct sockaddr_in *sin;
1604 #endif
1605 #ifdef INET6
1606 	struct sockaddr_in6 *sin6;
1607 	struct sockaddr_in6 *intf_addr6;
1608 #endif
1609 	int fnd;
1610 
1611 #ifdef INET
1612 	sin = NULL;
1613 #endif
1614 #ifdef INET6
1615 	sin6 = NULL;
1616 #endif
1617 	switch (nam->sa_family) {
1618 #ifdef INET
1619 	case AF_INET:
1620 		sin = (struct sockaddr_in *)nam;
1621 		break;
1622 #endif
1623 #ifdef INET6
1624 	case AF_INET6:
1625 		sin6 = (struct sockaddr_in6 *)nam;
1626 		break;
1627 #endif
1628 	default:
1629 		/* unsupported family */
1630 		return (NULL);
1631 	}
1632 
1633 	if (head == NULL)
1634 		return (NULL);
1635 
1636 	LIST_FOREACH(inp, head, sctp_hash) {
1637 		SCTP_INP_RLOCK(inp);
1638 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1639 			SCTP_INP_RUNLOCK(inp);
1640 			continue;
1641 		}
1642 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1643 		    (inp->sctp_lport == lport)) {
1644 			/* got it */
1645 			switch (nam->sa_family) {
1646 #ifdef INET
1647 			case AF_INET:
1648 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1649 				    SCTP_IPV6_V6ONLY(inp)) {
1650 					/*
1651 					 * IPv4 on a IPv6 socket with ONLY
1652 					 * IPv6 set
1653 					 */
1654 					SCTP_INP_RUNLOCK(inp);
1655 					continue;
1656 				}
1657 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1658 				    &sin->sin_addr) != 0) {
1659 					SCTP_INP_RUNLOCK(inp);
1660 					continue;
1661 				}
1662 				break;
1663 #endif
1664 #ifdef INET6
1665 			case AF_INET6:
1666 				/*
1667 				 * A V6 address and the endpoint is NOT
1668 				 * bound V6
1669 				 */
1670 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1671 					SCTP_INP_RUNLOCK(inp);
1672 					continue;
1673 				}
1674 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1675 				    &sin6->sin6_addr) != 0) {
1676 					SCTP_INP_RUNLOCK(inp);
1677 					continue;
1678 				}
1679 				break;
1680 #endif
1681 			default:
1682 				break;
1683 			}
1684 			/* does a VRF id match? */
1685 			fnd = 0;
1686 			if (inp->def_vrf_id == vrf_id)
1687 				fnd = 1;
1688 
1689 			SCTP_INP_RUNLOCK(inp);
1690 			if (!fnd)
1691 				continue;
1692 			return (inp);
1693 		}
1694 		SCTP_INP_RUNLOCK(inp);
1695 	}
1696 	switch (nam->sa_family) {
1697 #ifdef INET
1698 	case AF_INET:
1699 		if (sin->sin_addr.s_addr == INADDR_ANY) {
1700 			/* Can't hunt for one that has no address specified */
1701 			return (NULL);
1702 		}
1703 		break;
1704 #endif
1705 #ifdef INET6
1706 	case AF_INET6:
1707 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1708 			/* Can't hunt for one that has no address specified */
1709 			return (NULL);
1710 		}
1711 		break;
1712 #endif
1713 	default:
1714 		break;
1715 	}
1716 	/*
1717 	 * ok, not bound to all so see if we can find a EP bound to this
1718 	 * address.
1719 	 */
1720 	LIST_FOREACH(inp, head, sctp_hash) {
1721 		SCTP_INP_RLOCK(inp);
1722 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1723 			SCTP_INP_RUNLOCK(inp);
1724 			continue;
1725 		}
1726 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1727 			SCTP_INP_RUNLOCK(inp);
1728 			continue;
1729 		}
1730 		/*
1731 		 * Ok this could be a likely candidate, look at all of its
1732 		 * addresses
1733 		 */
1734 		if (inp->sctp_lport != lport) {
1735 			SCTP_INP_RUNLOCK(inp);
1736 			continue;
1737 		}
1738 		/* does a VRF id match? */
1739 		fnd = 0;
1740 		if (inp->def_vrf_id == vrf_id)
1741 			fnd = 1;
1742 
1743 		if (!fnd) {
1744 			SCTP_INP_RUNLOCK(inp);
1745 			continue;
1746 		}
1747 		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1748 			if (laddr->ifa == NULL) {
1749 				SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1750 				    __func__);
1751 				continue;
1752 			}
1753 			SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1754 			    (void *)laddr->ifa);
1755 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1756 				SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1757 				continue;
1758 			}
1759 			if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1760 				/* possible, see if it matches */
1761 				switch (nam->sa_family) {
1762 #ifdef INET
1763 				case AF_INET:
1764 					if (sin->sin_addr.s_addr ==
1765 					    laddr->ifa->address.sin.sin_addr.s_addr) {
1766 						SCTP_INP_RUNLOCK(inp);
1767 						return (inp);
1768 					}
1769 					break;
1770 #endif
1771 #ifdef INET6
1772 				case AF_INET6:
1773 					intf_addr6 = &laddr->ifa->address.sin6;
1774 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1775 					    intf_addr6)) {
1776 						SCTP_INP_RUNLOCK(inp);
1777 						return (inp);
1778 					}
1779 					break;
1780 #endif
1781 				}
1782 			}
1783 		}
1784 		SCTP_INP_RUNLOCK(inp);
1785 	}
1786 	return (NULL);
1787 }
1788 
1789 static struct sctp_inpcb *
1790 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1791 {
1792 	struct sctppcbhead *head;
1793 	struct sctp_inpcb *t_inp;
1794 	int fnd;
1795 
1796 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1797 	    SCTP_BASE_INFO(hashmark))];
1798 	LIST_FOREACH(t_inp, head, sctp_hash) {
1799 		if (t_inp->sctp_lport != lport) {
1800 			continue;
1801 		}
1802 		/* is it in the VRF in question */
1803 		fnd = 0;
1804 		if (t_inp->def_vrf_id == vrf_id)
1805 			fnd = 1;
1806 		if (!fnd)
1807 			continue;
1808 
1809 		/* This one is in use. */
1810 		/* check the v6/v4 binding issue */
1811 		if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1812 		    SCTP_IPV6_V6ONLY(t_inp)) {
1813 			if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1814 				/* collision in V6 space */
1815 				return (t_inp);
1816 			} else {
1817 				/* inp is BOUND_V4 no conflict */
1818 				continue;
1819 			}
1820 		} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1821 			/* t_inp is bound v4 and v6, conflict always */
1822 			return (t_inp);
1823 		} else {
1824 			/* t_inp is bound only V4 */
1825 			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1826 			    SCTP_IPV6_V6ONLY(inp)) {
1827 				/* no conflict */
1828 				continue;
1829 			}
1830 			/* else fall through to conflict */
1831 		}
1832 		return (t_inp);
1833 	}
1834 	return (NULL);
1835 }
1836 
1837 int
1838 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1839 {
1840 	/* For 1-2-1 with port reuse */
1841 	struct sctppcbhead *head;
1842 	struct sctp_inpcb *tinp, *ninp;
1843 
1844 	SCTP_INP_INFO_WLOCK_ASSERT();
1845 	SCTP_INP_WLOCK_ASSERT(inp);
1846 
1847 	if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1848 		/* only works with port reuse on */
1849 		return (-1);
1850 	}
1851 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1852 		return (0);
1853 	}
1854 	SCTP_INP_WUNLOCK(inp);
1855 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1856 	    SCTP_BASE_INFO(hashmark))];
1857 	/* Kick out all non-listeners to the TCP hash */
1858 	LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1859 		if (tinp->sctp_lport != inp->sctp_lport) {
1860 			continue;
1861 		}
1862 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1863 			continue;
1864 		}
1865 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1866 			continue;
1867 		}
1868 		if (SCTP_IS_LISTENING(tinp)) {
1869 			continue;
1870 		}
1871 		SCTP_INP_WLOCK(tinp);
1872 		LIST_REMOVE(tinp, sctp_hash);
1873 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1874 		tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1875 		LIST_INSERT_HEAD(head, tinp, sctp_hash);
1876 		SCTP_INP_WUNLOCK(tinp);
1877 	}
1878 	SCTP_INP_WLOCK(inp);
1879 	/* Pull from where he was */
1880 	LIST_REMOVE(inp, sctp_hash);
1881 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1882 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1883 	LIST_INSERT_HEAD(head, inp, sctp_hash);
1884 	return (0);
1885 }
1886 
1887 struct sctp_inpcb *
1888 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1889     uint32_t vrf_id)
1890 {
1891 	/*
1892 	 * First we check the hash table to see if someone has this port
1893 	 * bound with just the port.
1894 	 */
1895 	struct sctp_inpcb *inp;
1896 	struct sctppcbhead *head;
1897 	int lport;
1898 	unsigned int i;
1899 #ifdef INET
1900 	struct sockaddr_in *sin;
1901 #endif
1902 #ifdef INET6
1903 	struct sockaddr_in6 *sin6;
1904 #endif
1905 
1906 	switch (nam->sa_family) {
1907 #ifdef INET
1908 	case AF_INET:
1909 		sin = (struct sockaddr_in *)nam;
1910 		lport = sin->sin_port;
1911 		break;
1912 #endif
1913 #ifdef INET6
1914 	case AF_INET6:
1915 		sin6 = (struct sockaddr_in6 *)nam;
1916 		lport = sin6->sin6_port;
1917 		break;
1918 #endif
1919 	default:
1920 		return (NULL);
1921 	}
1922 	/*
1923 	 * I could cheat here and just cast to one of the types but we will
1924 	 * do it right. It also provides the check against an Unsupported
1925 	 * type too.
1926 	 */
1927 	/* Find the head of the ALLADDR chain */
1928 	if (have_lock == 0) {
1929 		SCTP_INP_INFO_RLOCK();
1930 	}
1931 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1932 	    SCTP_BASE_INFO(hashmark))];
1933 	inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1934 
1935 	/*
1936 	 * If the TCP model exists it could be that the main listening
1937 	 * endpoint is gone but there still exists a connected socket for
1938 	 * this guy. If so we can return the first one that we find. This
1939 	 * may NOT be the correct one so the caller should be wary on the
1940 	 * returned INP. Currently the only caller that sets find_tcp_pool
1941 	 * is in bindx where we are verifying that a user CAN bind the
1942 	 * address. He either has bound it already, or someone else has, or
1943 	 * its open to bind, so this is good enough.
1944 	 */
1945 	if (inp == NULL && find_tcp_pool) {
1946 		for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1947 			head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1948 			inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1949 			if (inp) {
1950 				break;
1951 			}
1952 		}
1953 	}
1954 	if (inp) {
1955 		SCTP_INP_INCR_REF(inp);
1956 	}
1957 	if (have_lock == 0) {
1958 		SCTP_INP_INFO_RUNLOCK();
1959 	}
1960 	return (inp);
1961 }
1962 
1963 /*
1964  * Find an association for an endpoint with the pointer to whom you want to
1965  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1966  * need to change the *to to some other struct like a mbuf...
1967  */
1968 struct sctp_tcb *
1969 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1970     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1971     uint32_t vrf_id)
1972 {
1973 	struct sctp_inpcb *inp = NULL;
1974 	struct sctp_tcb *stcb;
1975 
1976 	SCTP_INP_INFO_RLOCK();
1977 	if (find_tcp_pool) {
1978 		if (inp_p != NULL) {
1979 			stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1980 			    vrf_id);
1981 		} else {
1982 			stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1983 			    vrf_id);
1984 		}
1985 		if (stcb != NULL) {
1986 			SCTP_INP_INFO_RUNLOCK();
1987 			return (stcb);
1988 		}
1989 	}
1990 	inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1991 	if (inp_p != NULL) {
1992 		*inp_p = inp;
1993 	}
1994 	SCTP_INP_INFO_RUNLOCK();
1995 	if (inp == NULL) {
1996 		return (NULL);
1997 	}
1998 	/*
1999 	 * ok, we have an endpoint, now lets find the assoc for it (if any)
2000 	 * we now place the source address or from in the to of the find
2001 	 * endpoint call. Since in reality this chain is used from the
2002 	 * inbound packet side.
2003 	 */
2004 	if (inp_p != NULL) {
2005 		stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2006 		    NULL);
2007 	} else {
2008 		stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2009 		    NULL);
2010 	}
2011 	return (stcb);
2012 }
2013 
2014 /*
2015  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2016  * find all addresses that the sender has specified in any address list. Each
2017  * address will be used to lookup the TCB and see if one exits.
2018  */
2019 static struct sctp_tcb *
2020 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2021     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2022     struct sockaddr *dst)
2023 {
2024 	struct sctp_paramhdr *phdr, param_buf;
2025 #if defined(INET) || defined(INET6)
2026 	struct sctp_tcb *stcb;
2027 	uint16_t ptype;
2028 #endif
2029 	uint16_t plen;
2030 #ifdef INET
2031 	struct sockaddr_in sin4;
2032 #endif
2033 #ifdef INET6
2034 	struct sockaddr_in6 sin6;
2035 #endif
2036 
2037 #ifdef INET
2038 	memset(&sin4, 0, sizeof(sin4));
2039 	sin4.sin_len = sizeof(sin4);
2040 	sin4.sin_family = AF_INET;
2041 	sin4.sin_port = sh->src_port;
2042 #endif
2043 #ifdef INET6
2044 	memset(&sin6, 0, sizeof(sin6));
2045 	sin6.sin6_len = sizeof(sin6);
2046 	sin6.sin6_family = AF_INET6;
2047 	sin6.sin6_port = sh->src_port;
2048 #endif
2049 
2050 	offset += sizeof(struct sctp_init_chunk);
2051 
2052 	phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2053 	while (phdr != NULL) {
2054 		/* now we must see if we want the parameter */
2055 #if defined(INET) || defined(INET6)
2056 		ptype = ntohs(phdr->param_type);
2057 #endif
2058 		plen = ntohs(phdr->param_length);
2059 		if (plen == 0) {
2060 			break;
2061 		}
2062 #ifdef INET
2063 		if (ptype == SCTP_IPV4_ADDRESS &&
2064 		    plen == sizeof(struct sctp_ipv4addr_param)) {
2065 			/* Get the rest of the address */
2066 			struct sctp_ipv4addr_param ip4_param, *p4;
2067 
2068 			phdr = sctp_get_next_param(m, offset,
2069 			    (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2070 			if (phdr == NULL) {
2071 				return (NULL);
2072 			}
2073 			p4 = (struct sctp_ipv4addr_param *)phdr;
2074 			memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2075 			/* look it up */
2076 			stcb = sctp_findassociation_ep_addr(inp_p,
2077 			    (struct sockaddr *)&sin4, netp, dst, NULL);
2078 			if (stcb != NULL) {
2079 				return (stcb);
2080 			}
2081 		}
2082 #endif
2083 #ifdef INET6
2084 		if (ptype == SCTP_IPV6_ADDRESS &&
2085 		    plen == sizeof(struct sctp_ipv6addr_param)) {
2086 			/* Get the rest of the address */
2087 			struct sctp_ipv6addr_param ip6_param, *p6;
2088 
2089 			phdr = sctp_get_next_param(m, offset,
2090 			    (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2091 			if (phdr == NULL) {
2092 				return (NULL);
2093 			}
2094 			p6 = (struct sctp_ipv6addr_param *)phdr;
2095 			memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2096 			/* look it up */
2097 			stcb = sctp_findassociation_ep_addr(inp_p,
2098 			    (struct sockaddr *)&sin6, netp, dst, NULL);
2099 			if (stcb != NULL) {
2100 				return (stcb);
2101 			}
2102 		}
2103 #endif
2104 		offset += SCTP_SIZE32(plen);
2105 		phdr = sctp_get_next_param(m, offset, &param_buf,
2106 		    sizeof(param_buf));
2107 	}
2108 	return (NULL);
2109 }
2110 
2111 static struct sctp_tcb *
2112 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2113     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2114     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2115 {
2116 	/*
2117 	 * Use my vtag to hash. If we find it we then verify the source addr
2118 	 * is in the assoc. If all goes well we save a bit on rec of a
2119 	 * packet.
2120 	 */
2121 	struct sctpasochead *head;
2122 	struct sctp_nets *net;
2123 	struct sctp_tcb *stcb;
2124 
2125 	SCTP_INP_INFO_RLOCK();
2126 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2127 	    SCTP_BASE_INFO(hashasocmark))];
2128 	LIST_FOREACH(stcb, head, sctp_asocs) {
2129 		SCTP_INP_RLOCK(stcb->sctp_ep);
2130 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2131 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2132 			continue;
2133 		}
2134 		if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2135 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2136 			continue;
2137 		}
2138 		SCTP_TCB_LOCK(stcb);
2139 		SCTP_INP_RUNLOCK(stcb->sctp_ep);
2140 		if (stcb->asoc.my_vtag == vtag) {
2141 			/* candidate */
2142 			if (stcb->rport != rport) {
2143 				SCTP_TCB_UNLOCK(stcb);
2144 				continue;
2145 			}
2146 			if (stcb->sctp_ep->sctp_lport != lport) {
2147 				SCTP_TCB_UNLOCK(stcb);
2148 				continue;
2149 			}
2150 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2151 				SCTP_TCB_UNLOCK(stcb);
2152 				continue;
2153 			}
2154 			/* RRS:Need toaddr check here */
2155 			if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2156 				/* Endpoint does not own this address */
2157 				SCTP_TCB_UNLOCK(stcb);
2158 				continue;
2159 			}
2160 			if (remote_tag) {
2161 				/*
2162 				 * If we have both vtags that's all we match
2163 				 * on
2164 				 */
2165 				if (stcb->asoc.peer_vtag == remote_tag) {
2166 					/*
2167 					 * If both tags match we consider it
2168 					 * conclusive and check NO
2169 					 * source/destination addresses
2170 					 */
2171 					goto conclusive;
2172 				}
2173 			}
2174 			if (skip_src_check) {
2175 		conclusive:
2176 				if (from) {
2177 					*netp = sctp_findnet(stcb, from);
2178 				} else {
2179 					*netp = NULL;	/* unknown */
2180 				}
2181 				if (inp_p)
2182 					*inp_p = stcb->sctp_ep;
2183 				SCTP_INP_INFO_RUNLOCK();
2184 				return (stcb);
2185 			}
2186 			net = sctp_findnet(stcb, from);
2187 			if (net) {
2188 				/* yep its him. */
2189 				*netp = net;
2190 				SCTP_STAT_INCR(sctps_vtagexpress);
2191 				*inp_p = stcb->sctp_ep;
2192 				SCTP_INP_INFO_RUNLOCK();
2193 				return (stcb);
2194 			} else {
2195 				/*
2196 				 * not him, this should only happen in rare
2197 				 * cases so I peg it.
2198 				 */
2199 				SCTP_STAT_INCR(sctps_vtagbogus);
2200 			}
2201 		}
2202 		SCTP_TCB_UNLOCK(stcb);
2203 	}
2204 	SCTP_INP_INFO_RUNLOCK();
2205 	return (NULL);
2206 }
2207 
2208 /*
2209  * Find an association with the pointer to the inbound IP packet. This can be
2210  * a IPv4 or IPv6 packet.
2211  */
2212 struct sctp_tcb *
2213 sctp_findassociation_addr(struct mbuf *m, int offset,
2214     struct sockaddr *src, struct sockaddr *dst,
2215     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2216     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2217 {
2218 	struct sctp_tcb *stcb;
2219 	struct sctp_inpcb *inp;
2220 
2221 	if (sh->v_tag) {
2222 		/* we only go down this path if vtag is non-zero */
2223 		stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2224 		    inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2225 		if (stcb) {
2226 			return (stcb);
2227 		}
2228 	}
2229 
2230 	if (inp_p) {
2231 		stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2232 		    1, vrf_id);
2233 		inp = *inp_p;
2234 	} else {
2235 		stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2236 		    1, vrf_id);
2237 	}
2238 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2239 	if (stcb == NULL && inp) {
2240 		/* Found a EP but not this address */
2241 		if ((ch->chunk_type == SCTP_INITIATION) ||
2242 		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
2243 			/*-
2244 			 * special hook, we do NOT return linp or an
2245 			 * association that is linked to an existing
2246 			 * association that is under the TCP pool (i.e. no
2247 			 * listener exists). The endpoint finding routine
2248 			 * will always find a listener before examining the
2249 			 * TCP pool.
2250 			 */
2251 			if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2252 				if (inp_p) {
2253 					*inp_p = NULL;
2254 				}
2255 				return (NULL);
2256 			}
2257 			stcb = sctp_findassociation_special_addr(m,
2258 			    offset, sh, &inp, netp, dst);
2259 			if (inp_p != NULL) {
2260 				*inp_p = inp;
2261 			}
2262 		}
2263 	}
2264 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2265 	return (stcb);
2266 }
2267 
2268 /*
2269  * lookup an association by an ASCONF lookup address.
2270  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2271  */
2272 struct sctp_tcb *
2273 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2274     struct sockaddr *dst, struct sctphdr *sh,
2275     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2276 {
2277 	struct sctp_tcb *stcb;
2278 	union sctp_sockstore remote_store;
2279 	struct sctp_paramhdr param_buf, *phdr;
2280 	int ptype;
2281 	int zero_address = 0;
2282 #ifdef INET
2283 	struct sockaddr_in *sin;
2284 #endif
2285 #ifdef INET6
2286 	struct sockaddr_in6 *sin6;
2287 #endif
2288 
2289 	memset(&remote_store, 0, sizeof(remote_store));
2290 	phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2291 	    &param_buf, sizeof(struct sctp_paramhdr));
2292 	if (phdr == NULL) {
2293 		SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2294 		    __func__);
2295 		return NULL;
2296 	}
2297 	ptype = (int)((uint32_t)ntohs(phdr->param_type));
2298 	/* get the correlation address */
2299 	switch (ptype) {
2300 #ifdef INET6
2301 	case SCTP_IPV6_ADDRESS:
2302 		{
2303 			/* ipv6 address param */
2304 			struct sctp_ipv6addr_param *p6, p6_buf;
2305 
2306 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2307 				return NULL;
2308 			}
2309 			p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2310 			    offset + sizeof(struct sctp_asconf_chunk),
2311 			    &p6_buf.ph, sizeof(p6_buf));
2312 			if (p6 == NULL) {
2313 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2314 				    __func__);
2315 				return (NULL);
2316 			}
2317 			sin6 = &remote_store.sin6;
2318 			sin6->sin6_family = AF_INET6;
2319 			sin6->sin6_len = sizeof(*sin6);
2320 			sin6->sin6_port = sh->src_port;
2321 			memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2322 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2323 				zero_address = 1;
2324 			break;
2325 		}
2326 #endif
2327 #ifdef INET
2328 	case SCTP_IPV4_ADDRESS:
2329 		{
2330 			/* ipv4 address param */
2331 			struct sctp_ipv4addr_param *p4, p4_buf;
2332 
2333 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2334 				return NULL;
2335 			}
2336 			p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2337 			    offset + sizeof(struct sctp_asconf_chunk),
2338 			    &p4_buf.ph, sizeof(p4_buf));
2339 			if (p4 == NULL) {
2340 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2341 				    __func__);
2342 				return (NULL);
2343 			}
2344 			sin = &remote_store.sin;
2345 			sin->sin_family = AF_INET;
2346 			sin->sin_len = sizeof(*sin);
2347 			sin->sin_port = sh->src_port;
2348 			memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2349 			if (sin->sin_addr.s_addr == INADDR_ANY)
2350 				zero_address = 1;
2351 			break;
2352 		}
2353 #endif
2354 	default:
2355 		/* invalid address param type */
2356 		return NULL;
2357 	}
2358 
2359 	if (zero_address) {
2360 		stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2361 		    netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2362 		if (stcb != NULL) {
2363 			SCTP_INP_DECR_REF(*inp_p);
2364 		}
2365 	} else {
2366 		stcb = sctp_findassociation_ep_addr(inp_p,
2367 		    &remote_store.sa, netp,
2368 		    dst, NULL);
2369 	}
2370 	return (stcb);
2371 }
2372 
2373 /*
2374  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2375  * addresses. This way if we don't get a bind we by default pick a ephemeral
2376  * port with all addresses bound.
2377  */
2378 int
2379 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2380 {
2381 	/*
2382 	 * we get called when a new endpoint starts up. We need to allocate
2383 	 * the sctp_inpcb structure from the zone and init it. Mark it as
2384 	 * unbound and find a port that we can use as an ephemeral with
2385 	 * INADDR_ANY. If the user binds later no problem we can then add in
2386 	 * the specific addresses. And setup the default parameters for the
2387 	 * EP.
2388 	 */
2389 	int i, error;
2390 	struct sctp_inpcb *inp;
2391 	struct sctp_pcb *m;
2392 	struct timeval time;
2393 	sctp_sharedkey_t *null_key;
2394 
2395 	error = 0;
2396 
2397 	SCTP_INP_INFO_WLOCK();
2398 	inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2399 	if (inp == NULL) {
2400 		SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2401 		SCTP_INP_INFO_WUNLOCK();
2402 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2403 		return (ENOBUFS);
2404 	}
2405 	/* zap it */
2406 	memset(inp, 0, sizeof(*inp));
2407 
2408 	/* bump generations */
2409 	/* setup socket pointers */
2410 	inp->sctp_socket = so;
2411 	inp->ip_inp.inp.inp_socket = so;
2412 	inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2413 #ifdef INET6
2414 	if (INP_SOCKAF(so) == AF_INET6) {
2415 		if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2416 			inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2417 		}
2418 		if (MODULE_GLOBAL(ip6_v6only)) {
2419 			inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2420 		}
2421 	}
2422 #endif
2423 	inp->sctp_associd_counter = 1;
2424 	inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2425 	inp->sctp_frag_point = 0;
2426 	inp->max_cwnd = 0;
2427 	inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2428 	inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2429 	inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2430 	inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2431 	inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2432 	inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2433 	inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2434 	inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2435 	inp->idata_supported = 0;
2436 
2437 	inp->fibnum = so->so_fibnum;
2438 	/* init the small hash table we use to track asocid <-> tcb */
2439 	inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2440 	if (inp->sctp_asocidhash == NULL) {
2441 		crfree(inp->ip_inp.inp.inp_cred);
2442 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2443 		SCTP_INP_INFO_WUNLOCK();
2444 		return (ENOBUFS);
2445 	}
2446 	SCTP_INCR_EP_COUNT();
2447 	inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2448 	SCTP_INP_INFO_WUNLOCK();
2449 
2450 	so->so_pcb = (caddr_t)inp;
2451 
2452 	if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2453 		/* UDP style socket */
2454 		inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2455 		    SCTP_PCB_FLAGS_UNBOUND);
2456 		/* Be sure it is NON-BLOCKING IO for UDP */
2457 		/* SCTP_SET_SO_NBIO(so); */
2458 	} else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2459 		/* TCP style socket */
2460 		inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2461 		    SCTP_PCB_FLAGS_UNBOUND);
2462 		/* Be sure we have blocking IO by default */
2463 		SOCK_LOCK(so);
2464 		SCTP_CLEAR_SO_NBIO(so);
2465 		SOCK_UNLOCK(so);
2466 	} else {
2467 		/*
2468 		 * unsupported socket type (RAW, etc)- in case we missed it
2469 		 * in protosw
2470 		 */
2471 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2472 		so->so_pcb = NULL;
2473 		crfree(inp->ip_inp.inp.inp_cred);
2474 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2475 		return (EOPNOTSUPP);
2476 	}
2477 	if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2478 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2479 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2480 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2481 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2482 		sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2483 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2484 		sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2485 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2486 	}
2487 	inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2488 	    &inp->sctp_hashmark);
2489 	if (inp->sctp_tcbhash == NULL) {
2490 		SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2491 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2492 		so->so_pcb = NULL;
2493 		crfree(inp->ip_inp.inp.inp_cred);
2494 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2495 		return (ENOBUFS);
2496 	}
2497 	inp->def_vrf_id = vrf_id;
2498 
2499 	SCTP_INP_INFO_WLOCK();
2500 	SCTP_INP_LOCK_INIT(inp);
2501 	INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2502 	SCTP_INP_READ_INIT(inp);
2503 	SCTP_ASOC_CREATE_LOCK_INIT(inp);
2504 	/* lock the new ep */
2505 	SCTP_INP_WLOCK(inp);
2506 
2507 	/* add it to the info area */
2508 	LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2509 	SCTP_INP_INFO_WUNLOCK();
2510 
2511 	TAILQ_INIT(&inp->read_queue);
2512 	LIST_INIT(&inp->sctp_addr_list);
2513 
2514 	LIST_INIT(&inp->sctp_asoc_list);
2515 
2516 #ifdef SCTP_TRACK_FREED_ASOCS
2517 	/* TEMP CODE */
2518 	LIST_INIT(&inp->sctp_asoc_free_list);
2519 #endif
2520 	/* Init the timer structure for signature change */
2521 	SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2522 	inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2523 
2524 	/* now init the actual endpoint default data */
2525 	m = &inp->sctp_ep;
2526 
2527 	/* setup the base timeout information */
2528 	m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);	/* needed ? */
2529 	m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);	/* needed ? */
2530 	m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2531 	m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2532 	m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2533 	m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2534 	m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2535 	/* all max/min max are in ms */
2536 	m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2537 	m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2538 	m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2539 	m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2540 	m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2541 	m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2542 	m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2543 	m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2544 	m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2545 	m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2546 	m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2547 	m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2548 	m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2549 
2550 	m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2551 	m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2552 	m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2553 	/* number of streams to pre-open on a association */
2554 	m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2555 
2556 	m->default_mtu = 0;
2557 	/* Add adaptation cookie */
2558 	m->adaptation_layer_indicator = 0;
2559 	m->adaptation_layer_indicator_provided = 0;
2560 
2561 	/* seed random number generator */
2562 	m->random_counter = 1;
2563 	m->store_at = SCTP_SIGNATURE_SIZE;
2564 	SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2565 	sctp_fill_random_store(m);
2566 
2567 	/* Minimum cookie size */
2568 	m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2569 	    sizeof(struct sctp_state_cookie);
2570 	m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2571 
2572 	/* Setup the initial secret */
2573 	(void)SCTP_GETTIME_TIMEVAL(&time);
2574 	m->time_of_secret_change = (unsigned int)time.tv_sec;
2575 
2576 	for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2577 		m->secret_key[0][i] = sctp_select_initial_TSN(m);
2578 	}
2579 	sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2580 
2581 	/* How long is a cookie good for ? */
2582 	m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2583 	/*
2584 	 * Initialize authentication parameters
2585 	 */
2586 	m->local_hmacs = sctp_default_supported_hmaclist();
2587 	m->local_auth_chunks = sctp_alloc_chunklist();
2588 	if (inp->asconf_supported) {
2589 		sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2590 		sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2591 	}
2592 	m->default_dscp = 0;
2593 #ifdef INET6
2594 	m->default_flowlabel = 0;
2595 #endif
2596 	m->port = 0;		/* encapsulation disabled by default */
2597 	LIST_INIT(&m->shared_keys);
2598 	/* add default NULL key as key id 0 */
2599 	null_key = sctp_alloc_sharedkey();
2600 	sctp_insert_sharedkey(&m->shared_keys, null_key);
2601 	SCTP_INP_WUNLOCK(inp);
2602 #ifdef SCTP_LOG_CLOSING
2603 	sctp_log_closing(inp, NULL, 12);
2604 #endif
2605 	return (error);
2606 }
2607 
2608 void
2609 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2610     struct sctp_tcb *stcb)
2611 {
2612 	struct sctp_nets *net;
2613 	uint16_t lport, rport;
2614 	struct sctppcbhead *head;
2615 	struct sctp_laddr *laddr, *oladdr;
2616 
2617 	atomic_add_int(&stcb->asoc.refcnt, 1);
2618 	SCTP_TCB_UNLOCK(stcb);
2619 	SCTP_INP_INFO_WLOCK();
2620 	SCTP_INP_WLOCK(old_inp);
2621 	SCTP_INP_WLOCK(new_inp);
2622 	SCTP_TCB_LOCK(stcb);
2623 	atomic_subtract_int(&stcb->asoc.refcnt, 1);
2624 
2625 #ifdef INET6
2626 	if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2627 		new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS;
2628 		if (old_inp->ip_inp.inp.in6p_outputopts) {
2629 			new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT);
2630 		}
2631 	}
2632 #endif
2633 #if defined(INET) && defined(INET6)
2634 	else
2635 #endif
2636 #ifdef INET
2637 	{
2638 		new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos;
2639 		new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl;
2640 	}
2641 #endif
2642 	new_inp->sctp_ep.time_of_secret_change =
2643 	    old_inp->sctp_ep.time_of_secret_change;
2644 	memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2645 	    sizeof(old_inp->sctp_ep.secret_key));
2646 	new_inp->sctp_ep.current_secret_number =
2647 	    old_inp->sctp_ep.current_secret_number;
2648 	new_inp->sctp_ep.last_secret_number =
2649 	    old_inp->sctp_ep.last_secret_number;
2650 	new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2651 
2652 	/* make it so new data pours into the new socket */
2653 	stcb->sctp_socket = new_inp->sctp_socket;
2654 	stcb->sctp_ep = new_inp;
2655 
2656 	/* Copy the port across */
2657 	lport = new_inp->sctp_lport = old_inp->sctp_lport;
2658 	rport = stcb->rport;
2659 	/* Pull the tcb from the old association */
2660 	LIST_REMOVE(stcb, sctp_tcbhash);
2661 	LIST_REMOVE(stcb, sctp_tcblist);
2662 	if (stcb->asoc.in_asocid_hash) {
2663 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
2664 	}
2665 	/* Now insert the new_inp into the TCP connected hash */
2666 	head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2667 
2668 	LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2669 	/* Its safe to access */
2670 	new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2671 
2672 	/* Now move the tcb into the endpoint list */
2673 	LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2674 	/*
2675 	 * Question, do we even need to worry about the ep-hash since we
2676 	 * only have one connection? Probably not :> so lets get rid of it
2677 	 * and not suck up any kernel memory in that.
2678 	 */
2679 	if (stcb->asoc.in_asocid_hash) {
2680 		struct sctpasochead *lhd;
2681 
2682 		lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2683 		    new_inp->hashasocidmark)];
2684 		LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2685 	}
2686 	/* Ok. Let's restart timer. */
2687 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2688 		sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2689 		    stcb, net);
2690 	}
2691 
2692 	SCTP_INP_INFO_WUNLOCK();
2693 	if (new_inp->sctp_tcbhash != NULL) {
2694 		SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2695 		new_inp->sctp_tcbhash = NULL;
2696 	}
2697 	if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2698 		/* Subset bound, so copy in the laddr list from the old_inp */
2699 		LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2700 			laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2701 			if (laddr == NULL) {
2702 				/*
2703 				 * Gak, what can we do? This assoc is really
2704 				 * HOSED. We probably should send an abort
2705 				 * here.
2706 				 */
2707 				SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2708 				continue;
2709 			}
2710 			SCTP_INCR_LADDR_COUNT();
2711 			memset(laddr, 0, sizeof(*laddr));
2712 			(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2713 			laddr->ifa = oladdr->ifa;
2714 			atomic_add_int(&laddr->ifa->refcount, 1);
2715 			LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2716 			    sctp_nxt_addr);
2717 			new_inp->laddr_count++;
2718 			if (oladdr == stcb->asoc.last_used_address) {
2719 				stcb->asoc.last_used_address = laddr;
2720 			}
2721 		}
2722 	}
2723 	/* Now any running timers need to be adjusted. */
2724 	if (stcb->asoc.dack_timer.ep == old_inp) {
2725 		SCTP_INP_DECR_REF(old_inp);
2726 		stcb->asoc.dack_timer.ep = new_inp;
2727 		SCTP_INP_INCR_REF(new_inp);
2728 	}
2729 	if (stcb->asoc.asconf_timer.ep == old_inp) {
2730 		SCTP_INP_DECR_REF(old_inp);
2731 		stcb->asoc.asconf_timer.ep = new_inp;
2732 		SCTP_INP_INCR_REF(new_inp);
2733 	}
2734 	if (stcb->asoc.strreset_timer.ep == old_inp) {
2735 		SCTP_INP_DECR_REF(old_inp);
2736 		stcb->asoc.strreset_timer.ep = new_inp;
2737 		SCTP_INP_INCR_REF(new_inp);
2738 	}
2739 	if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2740 		SCTP_INP_DECR_REF(old_inp);
2741 		stcb->asoc.shut_guard_timer.ep = new_inp;
2742 		SCTP_INP_INCR_REF(new_inp);
2743 	}
2744 	if (stcb->asoc.autoclose_timer.ep == old_inp) {
2745 		SCTP_INP_DECR_REF(old_inp);
2746 		stcb->asoc.autoclose_timer.ep = new_inp;
2747 		SCTP_INP_INCR_REF(new_inp);
2748 	}
2749 	if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2750 		SCTP_INP_DECR_REF(old_inp);
2751 		stcb->asoc.delete_prim_timer.ep = new_inp;
2752 		SCTP_INP_INCR_REF(new_inp);
2753 	}
2754 	/* now what about the nets? */
2755 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2756 		if (net->pmtu_timer.ep == old_inp) {
2757 			SCTP_INP_DECR_REF(old_inp);
2758 			net->pmtu_timer.ep = new_inp;
2759 			SCTP_INP_INCR_REF(new_inp);
2760 		}
2761 		if (net->hb_timer.ep == old_inp) {
2762 			SCTP_INP_DECR_REF(old_inp);
2763 			net->hb_timer.ep = new_inp;
2764 			SCTP_INP_INCR_REF(new_inp);
2765 		}
2766 		if (net->rxt_timer.ep == old_inp) {
2767 			SCTP_INP_DECR_REF(old_inp);
2768 			net->rxt_timer.ep = new_inp;
2769 			SCTP_INP_INCR_REF(new_inp);
2770 		}
2771 	}
2772 	SCTP_INP_WUNLOCK(new_inp);
2773 	SCTP_INP_WUNLOCK(old_inp);
2774 }
2775 
2776 /*
2777  * insert an laddr entry with the given ifa for the desired list
2778  */
2779 static int
2780 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2781 {
2782 	struct sctp_laddr *laddr;
2783 
2784 	laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2785 	if (laddr == NULL) {
2786 		/* out of memory? */
2787 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2788 		return (EINVAL);
2789 	}
2790 	SCTP_INCR_LADDR_COUNT();
2791 	memset(laddr, 0, sizeof(*laddr));
2792 	(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2793 	laddr->ifa = ifa;
2794 	laddr->action = act;
2795 	atomic_add_int(&ifa->refcount, 1);
2796 	/* insert it */
2797 	LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2798 
2799 	return (0);
2800 }
2801 
2802 /*
2803  * Remove an laddr entry from the local address list (on an assoc)
2804  */
2805 static void
2806 sctp_remove_laddr(struct sctp_laddr *laddr)
2807 {
2808 
2809 	/* remove from the list */
2810 	LIST_REMOVE(laddr, sctp_nxt_addr);
2811 	sctp_free_ifa(laddr->ifa);
2812 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2813 	SCTP_DECR_LADDR_COUNT();
2814 }
2815 
2816 /*
2817  * Bind the socket, with the PCB and global info locks held.  Note, if a
2818  * socket address is specified, the PCB lock may be dropped and re-acquired.
2819  *
2820  * sctp_ifap is used to bypass normal local address validation checks.
2821  */
2822 int
2823 sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr,
2824     struct sctp_ifa *sctp_ifap, struct thread *td)
2825 {
2826 	/* bind a ep to a socket address */
2827 	struct sctppcbhead *head;
2828 	struct sctp_inpcb *inp_tmp;
2829 	struct inpcb *ip_inp;
2830 	int port_reuse_active = 0;
2831 	int bindall;
2832 	uint16_t lport;
2833 	int error;
2834 	uint32_t vrf_id;
2835 
2836 	KASSERT(td != NULL, ("%s: null thread", __func__));
2837 
2838 	error = 0;
2839 	lport = 0;
2840 	bindall = 1;
2841 	ip_inp = &inp->ip_inp.inp;
2842 
2843 	SCTP_INP_INFO_WLOCK_ASSERT();
2844 	SCTP_INP_WLOCK_ASSERT(inp);
2845 
2846 #ifdef SCTP_DEBUG
2847 	if (addr) {
2848 		SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2849 		    ntohs(((struct sockaddr_in *)addr)->sin_port));
2850 		SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2851 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2852 	}
2853 #endif
2854 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2855 		error = EINVAL;
2856 		/* already did a bind, subsequent binds NOT allowed ! */
2857 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2858 		goto out;
2859 	}
2860 	if (addr != NULL) {
2861 		switch (addr->sa_family) {
2862 #ifdef INET
2863 		case AF_INET:
2864 			{
2865 				struct sockaddr_in *sin;
2866 
2867 				/* IPV6_V6ONLY socket? */
2868 				if (SCTP_IPV6_V6ONLY(inp)) {
2869 					error = EINVAL;
2870 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2871 					goto out;
2872 				}
2873 				if (addr->sa_len != sizeof(*sin)) {
2874 					error = EINVAL;
2875 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2876 					goto out;
2877 				}
2878 
2879 				sin = (struct sockaddr_in *)addr;
2880 				lport = sin->sin_port;
2881 				/*
2882 				 * For LOOPBACK the prison_local_ip4() call
2883 				 * will transmute the ip address to the
2884 				 * proper value.
2885 				 */
2886 				if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) {
2887 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2888 					goto out;
2889 				}
2890 				if (sin->sin_addr.s_addr != INADDR_ANY) {
2891 					bindall = 0;
2892 				}
2893 				break;
2894 			}
2895 #endif
2896 #ifdef INET6
2897 		case AF_INET6:
2898 			{
2899 				/*
2900 				 * Only for pure IPv6 Address. (No IPv4
2901 				 * Mapped!)
2902 				 */
2903 				struct sockaddr_in6 *sin6;
2904 
2905 				sin6 = (struct sockaddr_in6 *)addr;
2906 				if (addr->sa_len != sizeof(*sin6)) {
2907 					error = EINVAL;
2908 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2909 					goto out;
2910 				}
2911 				lport = sin6->sin6_port;
2912 				/*
2913 				 * For LOOPBACK the prison_local_ip6() call
2914 				 * will transmute the ipv6 address to the
2915 				 * proper value.
2916 				 */
2917 				if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr,
2918 				    (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2919 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2920 					goto out;
2921 				}
2922 				if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2923 					bindall = 0;
2924 					/* KAME hack: embed scopeid */
2925 					if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2926 						error = EINVAL;
2927 						SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2928 						goto out;
2929 					}
2930 				}
2931 				/* this must be cleared for ifa_ifwithaddr() */
2932 				sin6->sin6_scope_id = 0;
2933 				break;
2934 			}
2935 #endif
2936 		default:
2937 			error = EAFNOSUPPORT;
2938 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2939 			goto out;
2940 		}
2941 	}
2942 	/* Setup a vrf_id to be the default for the non-bind-all case. */
2943 	vrf_id = inp->def_vrf_id;
2944 
2945 	if (lport) {
2946 		/*
2947 		 * Did the caller specify a port? if so we must see if an ep
2948 		 * already has this one bound.
2949 		 */
2950 		/* got to be root to get at low ports */
2951 		if (ntohs(lport) < IPPORT_RESERVED &&
2952 		    (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
2953 			goto out;
2954 		}
2955 		SCTP_INP_INCR_REF(inp);
2956 		SCTP_INP_WUNLOCK(inp);
2957 		if (bindall) {
2958 			vrf_id = inp->def_vrf_id;
2959 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2960 			if (inp_tmp != NULL) {
2961 				/*
2962 				 * lock guy returned and lower count note
2963 				 * that we are not bound so inp_tmp should
2964 				 * NEVER be inp. And it is this inp
2965 				 * (inp_tmp) that gets the reference bump,
2966 				 * so we must lower it.
2967 				 */
2968 				SCTP_INP_DECR_REF(inp_tmp);
2969 				/* unlock info */
2970 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2971 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2972 					/*
2973 					 * Ok, must be one-2-one and
2974 					 * allowing port re-use
2975 					 */
2976 					port_reuse_active = 1;
2977 					goto continue_anyway;
2978 				}
2979 				SCTP_INP_WLOCK(inp);
2980 				SCTP_INP_DECR_REF(inp);
2981 				error = EADDRINUSE;
2982 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2983 				goto out;
2984 			}
2985 		} else {
2986 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2987 			if (inp_tmp != NULL) {
2988 				/*
2989 				 * lock guy returned and lower count note
2990 				 * that we are not bound so inp_tmp should
2991 				 * NEVER be inp. And it is this inp
2992 				 * (inp_tmp) that gets the reference bump,
2993 				 * so we must lower it.
2994 				 */
2995 				SCTP_INP_DECR_REF(inp_tmp);
2996 				/* unlock info */
2997 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2998 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2999 					/*
3000 					 * Ok, must be one-2-one and
3001 					 * allowing port re-use
3002 					 */
3003 					port_reuse_active = 1;
3004 					goto continue_anyway;
3005 				}
3006 				SCTP_INP_WLOCK(inp);
3007 				SCTP_INP_DECR_REF(inp);
3008 				error = EADDRINUSE;
3009 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3010 				goto out;
3011 			}
3012 		}
3013 continue_anyway:
3014 		SCTP_INP_WLOCK(inp);
3015 		SCTP_INP_DECR_REF(inp);
3016 		if (bindall) {
3017 			/* verify that no lport is not used by a singleton */
3018 			if ((port_reuse_active == 0) &&
3019 			    (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3020 				/* Sorry someone already has this one bound */
3021 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3022 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3023 					port_reuse_active = 1;
3024 				} else {
3025 					error = EADDRINUSE;
3026 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3027 					goto out;
3028 				}
3029 			}
3030 		}
3031 	} else {
3032 		uint16_t first, last, candidate;
3033 		uint16_t count;
3034 
3035 		if (ip_inp->inp_flags & INP_HIGHPORT) {
3036 			first = MODULE_GLOBAL(ipport_hifirstauto);
3037 			last = MODULE_GLOBAL(ipport_hilastauto);
3038 		} else if (ip_inp->inp_flags & INP_LOWPORT) {
3039 			if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) {
3040 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3041 				goto out;
3042 			}
3043 			first = MODULE_GLOBAL(ipport_lowfirstauto);
3044 			last = MODULE_GLOBAL(ipport_lowlastauto);
3045 		} else {
3046 			first = MODULE_GLOBAL(ipport_firstauto);
3047 			last = MODULE_GLOBAL(ipport_lastauto);
3048 		}
3049 		if (first > last) {
3050 			uint16_t temp;
3051 
3052 			temp = first;
3053 			first = last;
3054 			last = temp;
3055 		}
3056 		count = last - first + 1;	/* number of candidates */
3057 		candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3058 
3059 		for (;;) {
3060 			if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3061 				lport = htons(candidate);
3062 				break;
3063 			}
3064 			if (--count == 0) {
3065 				error = EADDRINUSE;
3066 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3067 				goto out;
3068 			}
3069 			if (candidate == last)
3070 				candidate = first;
3071 			else
3072 				candidate = candidate + 1;
3073 		}
3074 	}
3075 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3076 	    SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3077 		/*
3078 		 * this really should not happen. The guy did a non-blocking
3079 		 * bind and then did a close at the same time.
3080 		 */
3081 		error = EINVAL;
3082 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3083 		goto out;
3084 	}
3085 	/* ok we look clear to give out this port, so lets setup the binding */
3086 	if (bindall) {
3087 		/* binding to all addresses, so just set in the proper flags */
3088 		inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3089 		/* set the automatic addr changes from kernel flag */
3090 		if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3091 			sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3092 			sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3093 		} else {
3094 			sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3095 			sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3096 		}
3097 		if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3098 			sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3099 		} else {
3100 			sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3101 		}
3102 		/*
3103 		 * set the automatic mobility_base from kernel flag (by
3104 		 * micchie)
3105 		 */
3106 		if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3107 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3108 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109 		} else {
3110 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3111 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3112 		}
3113 		/*
3114 		 * set the automatic mobility_fasthandoff from kernel flag
3115 		 * (by micchie)
3116 		 */
3117 		if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3118 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3119 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3120 		} else {
3121 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3122 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3123 		}
3124 	} else {
3125 		/*
3126 		 * bind specific, make sure flags is off and add a new
3127 		 * address structure to the sctp_addr_list inside the ep
3128 		 * structure.
3129 		 *
3130 		 * We will need to allocate one and insert it at the head.
3131 		 * The socketopt call can just insert new addresses in there
3132 		 * as well. It will also have to do the embed scope kame
3133 		 * hack too (before adding).
3134 		 */
3135 		struct sctp_ifa *ifa;
3136 		union sctp_sockstore store;
3137 
3138 		memset(&store, 0, sizeof(store));
3139 		switch (addr->sa_family) {
3140 #ifdef INET
3141 		case AF_INET:
3142 			memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3143 			store.sin.sin_port = 0;
3144 			break;
3145 #endif
3146 #ifdef INET6
3147 		case AF_INET6:
3148 			memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3149 			store.sin6.sin6_port = 0;
3150 			break;
3151 #endif
3152 		default:
3153 			break;
3154 		}
3155 		/*
3156 		 * first find the interface with the bound address need to
3157 		 * zero out the port to find the address! yuck! can't do
3158 		 * this earlier since need port for sctp_pcb_findep()
3159 		 */
3160 		if (sctp_ifap != NULL) {
3161 			ifa = sctp_ifap;
3162 		} else {
3163 			/*
3164 			 * Note for BSD we hit here always other O/S's will
3165 			 * pass things in via the sctp_ifap argument.
3166 			 */
3167 			ifa = sctp_find_ifa_by_addr(&store.sa,
3168 			    vrf_id, SCTP_ADDR_NOT_LOCKED);
3169 		}
3170 		if (ifa == NULL) {
3171 			error = EADDRNOTAVAIL;
3172 			/* Can't find an interface with that address */
3173 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3174 			goto out;
3175 		}
3176 #ifdef INET6
3177 		if (addr->sa_family == AF_INET6) {
3178 			/* GAK, more FIXME IFA lock? */
3179 			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3180 				/* Can't bind a non-existent addr. */
3181 				error = EINVAL;
3182 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3183 				goto out;
3184 			}
3185 		}
3186 #endif
3187 		/* we're not bound all */
3188 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3189 		/* allow bindx() to send ASCONF's for binding changes */
3190 		sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3191 		/* clear automatic addr changes from kernel flag */
3192 		sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3193 
3194 		/* add this address to the endpoint list */
3195 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3196 		if (error != 0)
3197 			goto out;
3198 		inp->laddr_count++;
3199 	}
3200 	/* find the bucket */
3201 	if (port_reuse_active) {
3202 		/* Put it into tcp 1-2-1 hash */
3203 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3204 		inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3205 	} else {
3206 		head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3207 	}
3208 	/* put it in the bucket */
3209 	LIST_INSERT_HEAD(head, inp, sctp_hash);
3210 	SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3211 	    (void *)head, ntohs(lport), port_reuse_active);
3212 	/* set in the port */
3213 	inp->sctp_lport = lport;
3214 
3215 	/* turn off just the unbound flag */
3216 	KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0,
3217 	    ("%s: inp %p is already bound", __func__, inp));
3218 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3219 out:
3220 	return (error);
3221 }
3222 
3223 int
3224 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
3225     struct sctp_ifa *sctp_ifap, struct thread *td)
3226 {
3227 	struct sctp_inpcb *inp;
3228 	int error;
3229 
3230 	inp = so->so_pcb;
3231 	SCTP_INP_INFO_WLOCK();
3232 	SCTP_INP_WLOCK(inp);
3233 	error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td);
3234 	SCTP_INP_WUNLOCK(inp);
3235 	SCTP_INP_INFO_WUNLOCK();
3236 	return (error);
3237 }
3238 
3239 static void
3240 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3241 {
3242 	struct sctp_iterator *it, *nit;
3243 
3244 	/*
3245 	 * We enter with the only the ITERATOR_LOCK in place and a write
3246 	 * lock on the inp_info stuff.
3247 	 */
3248 	it = sctp_it_ctl.cur_it;
3249 	if (it && (it->vn != curvnet)) {
3250 		/* Its not looking at our VNET */
3251 		return;
3252 	}
3253 	if (it && (it->inp == inp)) {
3254 		/*
3255 		 * This is tricky and we hold the iterator lock, but when it
3256 		 * returns and gets the lock (when we release it) the
3257 		 * iterator will try to operate on inp. We need to stop that
3258 		 * from happening. But of course the iterator has a
3259 		 * reference on the stcb and inp. We can mark it and it will
3260 		 * stop.
3261 		 *
3262 		 * If its a single iterator situation, we set the end
3263 		 * iterator flag. Otherwise we set the iterator to go to the
3264 		 * next inp.
3265 		 *
3266 		 */
3267 		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3268 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3269 		} else {
3270 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3271 		}
3272 	}
3273 	/*
3274 	 * Now go through and remove any single reference to our inp that
3275 	 * may be still pending on the list
3276 	 */
3277 	SCTP_IPI_ITERATOR_WQ_LOCK();
3278 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3279 		if (it->vn != curvnet) {
3280 			continue;
3281 		}
3282 		if (it->inp == inp) {
3283 			/* This one points to me is it inp specific? */
3284 			if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3285 				/* Remove and free this one */
3286 				TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3287 				    it, sctp_nxt_itr);
3288 				if (it->function_atend != NULL) {
3289 					(*it->function_atend) (it->pointer, it->val);
3290 				}
3291 				SCTP_FREE(it, SCTP_M_ITER);
3292 			} else {
3293 				it->inp = LIST_NEXT(it->inp, sctp_list);
3294 				if (it->inp) {
3295 					SCTP_INP_INCR_REF(it->inp);
3296 				}
3297 			}
3298 			/*
3299 			 * When its put in the refcnt is incremented so decr
3300 			 * it
3301 			 */
3302 			SCTP_INP_DECR_REF(inp);
3303 		}
3304 	}
3305 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
3306 }
3307 
3308 /* release sctp_inpcb unbind the port */
3309 void
3310 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3311 {
3312 	/*
3313 	 * Here we free a endpoint. We must find it (if it is in the Hash
3314 	 * table) and remove it from there. Then we must also find it in the
3315 	 * overall list and remove it from there. After all removals are
3316 	 * complete then any timer has to be stopped. Then start the actual
3317 	 * freeing. a) Any local lists. b) Any associations. c) The hash of
3318 	 * all associations. d) finally the ep itself.
3319 	 */
3320 	struct sctp_tcb *asoc, *nasoc;
3321 	struct sctp_laddr *laddr, *nladdr;
3322 	struct inpcb *ip_pcb;
3323 	struct socket *so;
3324 	int being_refed = 0;
3325 	struct sctp_queued_to_read *sq, *nsq;
3326 	int cnt;
3327 	sctp_sharedkey_t *shared_key, *nshared_key;
3328 
3329 #ifdef SCTP_LOG_CLOSING
3330 	sctp_log_closing(inp, NULL, 0);
3331 #endif
3332 	SCTP_ITERATOR_LOCK();
3333 	/* mark any iterators on the list or being processed */
3334 	sctp_iterator_inp_being_freed(inp);
3335 	SCTP_ITERATOR_UNLOCK();
3336 
3337 	SCTP_ASOC_CREATE_LOCK(inp);
3338 	SCTP_INP_INFO_WLOCK();
3339 	SCTP_INP_WLOCK(inp);
3340 	so = inp->sctp_socket;
3341 	KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0,
3342 	    ("%s: inp %p still has socket", __func__, inp));
3343 	KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0,
3344 	    ("%s: double free of inp %p", __func__, inp));
3345 	if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3346 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3347 		/* socket is gone, so no more wakeups allowed */
3348 		inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3349 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3350 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3351 	}
3352 	/* First time through we have the socket lock, after that no more. */
3353 	sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3354 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3355 
3356 	if (inp->control) {
3357 		sctp_m_freem(inp->control);
3358 		inp->control = NULL;
3359 	}
3360 	if (inp->pkt) {
3361 		sctp_m_freem(inp->pkt);
3362 		inp->pkt = NULL;
3363 	}
3364 	ip_pcb = &inp->ip_inp.inp;	/* we could just cast the main pointer
3365 					 * here but I will be nice :> (i.e.
3366 					 * ip_pcb = ep;) */
3367 	if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3368 		int cnt_in_sd;
3369 
3370 		cnt_in_sd = 0;
3371 		LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3372 			SCTP_TCB_LOCK(asoc);
3373 			if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3374 				asoc->sctp_socket = NULL;
3375 				/* Skip guys being freed */
3376 				cnt_in_sd++;
3377 				if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3378 					/*
3379 					 * Special case - we did not start a
3380 					 * kill timer on the asoc due to it
3381 					 * was not closed. So go ahead and
3382 					 * start it now.
3383 					 */
3384 					SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3385 					sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3386 				}
3387 				SCTP_TCB_UNLOCK(asoc);
3388 				continue;
3389 			}
3390 			if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3391 			    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3392 			    (asoc->asoc.total_output_queue_size == 0)) {
3393 				/*
3394 				 * If we have data in queue, we don't want
3395 				 * to just free since the app may have done,
3396 				 * send()/close or connect/send/close. And
3397 				 * it wants the data to get across first.
3398 				 */
3399 				/* Just abandon things in the front states */
3400 				if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3401 				    SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3402 					cnt_in_sd++;
3403 				}
3404 				continue;
3405 			}
3406 			/* Disconnect the socket please */
3407 			asoc->sctp_socket = NULL;
3408 			SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3409 			if ((asoc->asoc.size_on_reasm_queue > 0) ||
3410 			    (asoc->asoc.control_pdapi) ||
3411 			    (asoc->asoc.size_on_all_streams > 0) ||
3412 			    (so && (so->so_rcv.sb_cc > 0))) {
3413 				/* Left with Data unread */
3414 				struct mbuf *op_err;
3415 
3416 				op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3417 				asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3418 				sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3419 				SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3420 				if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3421 				    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3422 					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3423 				}
3424 				if (sctp_free_assoc(inp, asoc,
3425 				    SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3426 					cnt_in_sd++;
3427 				}
3428 				continue;
3429 			} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3430 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3431 			    (asoc->asoc.stream_queue_cnt == 0)) {
3432 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3433 					goto abort_anyway;
3434 				}
3435 				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3436 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3437 					struct sctp_nets *netp;
3438 
3439 					/*
3440 					 * there is nothing queued to send,
3441 					 * so I send shutdown
3442 					 */
3443 					if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3444 					    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3445 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3446 					}
3447 					SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3448 					sctp_stop_timers_for_shutdown(asoc);
3449 					if (asoc->asoc.alternate) {
3450 						netp = asoc->asoc.alternate;
3451 					} else {
3452 						netp = asoc->asoc.primary_destination;
3453 					}
3454 					sctp_send_shutdown(asoc, netp);
3455 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3456 					    netp);
3457 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3458 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3459 				}
3460 			} else {
3461 				/* mark into shutdown pending */
3462 				SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3463 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3464 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3465 					SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3466 				}
3467 				if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3468 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3469 				    (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3470 					struct mbuf *op_err;
3471 
3472 			abort_anyway:
3473 					op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3474 					asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3475 					sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3476 					SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3477 					if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3478 					    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3479 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3480 					}
3481 					if (sctp_free_assoc(inp, asoc,
3482 					    SCTP_PCBFREE_NOFORCE,
3483 					    SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3484 						cnt_in_sd++;
3485 					}
3486 					continue;
3487 				} else {
3488 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3489 				}
3490 			}
3491 			cnt_in_sd++;
3492 			SCTP_TCB_UNLOCK(asoc);
3493 		}
3494 		/* now is there some left in our SHUTDOWN state? */
3495 		if (cnt_in_sd) {
3496 #ifdef SCTP_LOG_CLOSING
3497 			sctp_log_closing(inp, NULL, 2);
3498 #endif
3499 			inp->sctp_socket = NULL;
3500 			SCTP_INP_WUNLOCK(inp);
3501 			SCTP_ASOC_CREATE_UNLOCK(inp);
3502 			SCTP_INP_INFO_WUNLOCK();
3503 			return;
3504 		}
3505 	}
3506 	inp->sctp_socket = NULL;
3507 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3508 	    SCTP_PCB_FLAGS_UNBOUND) {
3509 		/*
3510 		 * ok, this guy has been bound. It's port is somewhere in
3511 		 * the SCTP_BASE_INFO(hash table). Remove it!
3512 		 */
3513 		LIST_REMOVE(inp, sctp_hash);
3514 		inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3515 	}
3516 
3517 	/*
3518 	 * If there is a timer running to kill us, forget it, since it may
3519 	 * have a contest on the INP lock.. which would cause us to die ...
3520 	 */
3521 	cnt = 0;
3522 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3523 		SCTP_TCB_LOCK(asoc);
3524 		if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3525 			/* Disconnect the socket please */
3526 			asoc->sctp_socket = NULL;
3527 			SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3528 		}
3529 		if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3530 			if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3531 				SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3532 				sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3533 			}
3534 			cnt++;
3535 			SCTP_TCB_UNLOCK(asoc);
3536 			continue;
3537 		}
3538 		/* Free associations that are NOT killing us */
3539 		if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3540 		    ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3541 			struct mbuf *op_err;
3542 
3543 			op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3544 			asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3545 			sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3546 			SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3547 		} else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3548 			cnt++;
3549 			SCTP_TCB_UNLOCK(asoc);
3550 			continue;
3551 		}
3552 		if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3553 		    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3554 			SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3555 		}
3556 		if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3557 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3558 			cnt++;
3559 		}
3560 	}
3561 	if (cnt) {
3562 		/* Ok we have someone out there that will kill us */
3563 #ifdef SCTP_LOG_CLOSING
3564 		sctp_log_closing(inp, NULL, 3);
3565 #endif
3566 		SCTP_INP_WUNLOCK(inp);
3567 		SCTP_ASOC_CREATE_UNLOCK(inp);
3568 		SCTP_INP_INFO_WUNLOCK();
3569 		return;
3570 	}
3571 	if (SCTP_INP_LOCK_CONTENDED(inp))
3572 		being_refed++;
3573 	if (SCTP_INP_READ_CONTENDED(inp))
3574 		being_refed++;
3575 	if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3576 		being_refed++;
3577 	/* NOTE: 0 refcount also means no timers are referencing us. */
3578 	if ((inp->refcount) ||
3579 	    (being_refed) ||
3580 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3581 #ifdef SCTP_LOG_CLOSING
3582 		sctp_log_closing(inp, NULL, 4);
3583 #endif
3584 		sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3585 		SCTP_INP_WUNLOCK(inp);
3586 		SCTP_ASOC_CREATE_UNLOCK(inp);
3587 		SCTP_INP_INFO_WUNLOCK();
3588 		return;
3589 	}
3590 	inp->sctp_ep.signature_change.type = 0;
3591 	inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3592 	/*
3593 	 * Remove it from the list .. last thing we need a lock for.
3594 	 */
3595 	LIST_REMOVE(inp, sctp_list);
3596 	SCTP_INP_WUNLOCK(inp);
3597 	SCTP_ASOC_CREATE_UNLOCK(inp);
3598 	SCTP_INP_INFO_WUNLOCK();
3599 
3600 #ifdef SCTP_LOG_CLOSING
3601 	sctp_log_closing(inp, NULL, 5);
3602 #endif
3603 	if ((inp->sctp_asocidhash) != NULL) {
3604 		SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3605 		inp->sctp_asocidhash = NULL;
3606 	}
3607 	/* sa_ignore FREED_MEMORY */
3608 	TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3609 		/* Its only abandoned if it had data left */
3610 		if (sq->length)
3611 			SCTP_STAT_INCR(sctps_left_abandon);
3612 
3613 		TAILQ_REMOVE(&inp->read_queue, sq, next);
3614 		sctp_free_remote_addr(sq->whoFrom);
3615 		if (so)
3616 			so->so_rcv.sb_cc -= sq->length;
3617 		if (sq->data) {
3618 			sctp_m_freem(sq->data);
3619 			sq->data = NULL;
3620 		}
3621 		/*
3622 		 * no need to free the net count, since at this point all
3623 		 * assoc's are gone.
3624 		 */
3625 		sctp_free_a_readq(NULL, sq);
3626 	}
3627 	/* Now the sctp_pcb things */
3628 	/*
3629 	 * free each asoc if it is not already closed/free. we can't use the
3630 	 * macro here since le_next will get freed as part of the
3631 	 * sctp_free_assoc() call.
3632 	 */
3633 	if (ip_pcb->inp_options) {
3634 		(void)sctp_m_free(ip_pcb->inp_options);
3635 		ip_pcb->inp_options = 0;
3636 	}
3637 #ifdef INET6
3638 	if (ip_pcb->inp_vflag & INP_IPV6) {
3639 		ip6_freepcbopts(ip_pcb->in6p_outputopts);
3640 	}
3641 #endif				/* INET6 */
3642 	ip_pcb->inp_vflag = 0;
3643 	/* free up authentication fields */
3644 	if (inp->sctp_ep.local_auth_chunks != NULL)
3645 		sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3646 	if (inp->sctp_ep.local_hmacs != NULL)
3647 		sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3648 
3649 	LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3650 		LIST_REMOVE(shared_key, next);
3651 		sctp_free_sharedkey(shared_key);
3652 		/* sa_ignore FREED_MEMORY */
3653 	}
3654 
3655 	/*
3656 	 * if we have an address list the following will free the list of
3657 	 * ifaddr's that are set into this ep. Again macro limitations here,
3658 	 * since the LIST_FOREACH could be a bad idea.
3659 	 */
3660 	LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3661 		sctp_remove_laddr(laddr);
3662 	}
3663 
3664 #ifdef SCTP_TRACK_FREED_ASOCS
3665 	/* TEMP CODE */
3666 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3667 		LIST_REMOVE(asoc, sctp_tcblist);
3668 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3669 		SCTP_DECR_ASOC_COUNT();
3670 	}
3671 	/* *** END TEMP CODE *** */
3672 #endif
3673 	/* Now lets see about freeing the EP hash table. */
3674 	if (inp->sctp_tcbhash != NULL) {
3675 		SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3676 		inp->sctp_tcbhash = NULL;
3677 	}
3678 	/* Now we must put the ep memory back into the zone pool */
3679 	crfree(inp->ip_inp.inp.inp_cred);
3680 	INP_LOCK_DESTROY(&inp->ip_inp.inp);
3681 	SCTP_INP_LOCK_DESTROY(inp);
3682 	SCTP_INP_READ_DESTROY(inp);
3683 	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3684 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3685 	SCTP_DECR_EP_COUNT();
3686 }
3687 
3688 struct sctp_nets *
3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3690 {
3691 	struct sctp_nets *net;
3692 
3693 	/* locate the address */
3694 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3695 		if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3696 			return (net);
3697 	}
3698 	return (NULL);
3699 }
3700 
3701 int
3702 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3703 {
3704 	struct sctp_ifa *sctp_ifa;
3705 
3706 	sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3707 	if (sctp_ifa) {
3708 		return (1);
3709 	} else {
3710 		return (0);
3711 	}
3712 }
3713 
3714 /*
3715  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3716  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3717  * stats of stuff.
3718  */
3719 int
3720 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3721     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3722 {
3723 	/*
3724 	 * The following is redundant to the same lines in the
3725 	 * sctp_aloc_assoc() but is needed since others call the add address
3726 	 * function
3727 	 */
3728 	struct sctp_nets *net, *netfirst;
3729 	int addr_inscope;
3730 
3731 	SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3732 	    from);
3733 	SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3734 
3735 	netfirst = sctp_findnet(stcb, newaddr);
3736 	if (netfirst) {
3737 		/*
3738 		 * Lie and return ok, we don't want to make the association
3739 		 * go away for this behavior. It will happen in the TCP
3740 		 * model in a connected socket. It does not reach the hash
3741 		 * table until after the association is built so it can't be
3742 		 * found. Mark as reachable, since the initial creation will
3743 		 * have been cleared and the NOT_IN_ASSOC flag will have
3744 		 * been added... and we don't want to end up removing it
3745 		 * back out.
3746 		 */
3747 		if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3748 			netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3749 			    SCTP_ADDR_UNCONFIRMED);
3750 		} else {
3751 			netfirst->dest_state = SCTP_ADDR_REACHABLE;
3752 		}
3753 
3754 		return (0);
3755 	}
3756 	addr_inscope = 1;
3757 	switch (newaddr->sa_family) {
3758 #ifdef INET
3759 	case AF_INET:
3760 		{
3761 			struct sockaddr_in *sin;
3762 
3763 			sin = (struct sockaddr_in *)newaddr;
3764 			if (sin->sin_addr.s_addr == 0) {
3765 				/* Invalid address */
3766 				return (-1);
3767 			}
3768 			/* zero out the zero area */
3769 			memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3770 
3771 			/* assure len is set */
3772 			sin->sin_len = sizeof(struct sockaddr_in);
3773 			if (set_scope) {
3774 				if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3775 					stcb->asoc.scope.ipv4_local_scope = 1;
3776 				}
3777 			} else {
3778 				/* Validate the address is in scope */
3779 				if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3780 				    (stcb->asoc.scope.ipv4_local_scope == 0)) {
3781 					addr_inscope = 0;
3782 				}
3783 			}
3784 			break;
3785 		}
3786 #endif
3787 #ifdef INET6
3788 	case AF_INET6:
3789 		{
3790 			struct sockaddr_in6 *sin6;
3791 
3792 			sin6 = (struct sockaddr_in6 *)newaddr;
3793 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3794 				/* Invalid address */
3795 				return (-1);
3796 			}
3797 			/* assure len is set */
3798 			sin6->sin6_len = sizeof(struct sockaddr_in6);
3799 			if (set_scope) {
3800 				if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3801 					stcb->asoc.scope.loopback_scope = 1;
3802 					stcb->asoc.scope.local_scope = 0;
3803 					stcb->asoc.scope.ipv4_local_scope = 1;
3804 					stcb->asoc.scope.site_scope = 1;
3805 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3806 					/*
3807 					 * If the new destination is a
3808 					 * LINK_LOCAL we must have common
3809 					 * site scope. Don't set the local
3810 					 * scope since we may not share all
3811 					 * links, only loopback can do this.
3812 					 * Links on the local network would
3813 					 * also be on our private network
3814 					 * for v4 too.
3815 					 */
3816 					stcb->asoc.scope.ipv4_local_scope = 1;
3817 					stcb->asoc.scope.site_scope = 1;
3818 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3819 					/*
3820 					 * If the new destination is
3821 					 * SITE_LOCAL then we must have site
3822 					 * scope in common.
3823 					 */
3824 					stcb->asoc.scope.site_scope = 1;
3825 				}
3826 			} else {
3827 				/* Validate the address is in scope */
3828 				if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3829 				    (stcb->asoc.scope.loopback_scope == 0)) {
3830 					addr_inscope = 0;
3831 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3832 				    (stcb->asoc.scope.local_scope == 0)) {
3833 					addr_inscope = 0;
3834 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3835 				    (stcb->asoc.scope.site_scope == 0)) {
3836 					addr_inscope = 0;
3837 				}
3838 			}
3839 			break;
3840 		}
3841 #endif
3842 	default:
3843 		/* not supported family type */
3844 		return (-1);
3845 	}
3846 	net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3847 	if (net == NULL) {
3848 		return (-1);
3849 	}
3850 	SCTP_INCR_RADDR_COUNT();
3851 	memset(net, 0, sizeof(struct sctp_nets));
3852 	(void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3853 	memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3854 	switch (newaddr->sa_family) {
3855 #ifdef INET
3856 	case AF_INET:
3857 		((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3858 		break;
3859 #endif
3860 #ifdef INET6
3861 	case AF_INET6:
3862 		((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3863 		break;
3864 #endif
3865 	default:
3866 		break;
3867 	}
3868 	net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3869 	if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3870 		stcb->asoc.scope.loopback_scope = 1;
3871 		stcb->asoc.scope.ipv4_local_scope = 1;
3872 		stcb->asoc.scope.local_scope = 0;
3873 		stcb->asoc.scope.site_scope = 1;
3874 		addr_inscope = 1;
3875 	}
3876 	net->failure_threshold = stcb->asoc.def_net_failure;
3877 	net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3878 	if (addr_inscope == 0) {
3879 		net->dest_state = (SCTP_ADDR_REACHABLE |
3880 		    SCTP_ADDR_OUT_OF_SCOPE);
3881 	} else {
3882 		if (from == SCTP_ADDR_IS_CONFIRMED)
3883 			/* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3884 			net->dest_state = SCTP_ADDR_REACHABLE;
3885 		else
3886 			net->dest_state = SCTP_ADDR_REACHABLE |
3887 			    SCTP_ADDR_UNCONFIRMED;
3888 	}
3889 	/*
3890 	 * We set this to 0, the timer code knows that this means its an
3891 	 * initial value
3892 	 */
3893 	net->rto_needed = 1;
3894 	net->RTO = 0;
3895 	net->RTO_measured = 0;
3896 	stcb->asoc.numnets++;
3897 	net->ref_count = 1;
3898 	net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3899 	net->port = port;
3900 	net->dscp = stcb->asoc.default_dscp;
3901 #ifdef INET6
3902 	net->flowlabel = stcb->asoc.default_flowlabel;
3903 #endif
3904 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3905 		net->dest_state |= SCTP_ADDR_NOHB;
3906 	} else {
3907 		net->dest_state &= ~SCTP_ADDR_NOHB;
3908 	}
3909 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3910 		net->dest_state |= SCTP_ADDR_NO_PMTUD;
3911 	} else {
3912 		net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3913 	}
3914 	net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3915 	/* Init the timer structure */
3916 	SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3917 	SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3918 	SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3919 
3920 	/* Now generate a route for this guy */
3921 #ifdef INET6
3922 	/* KAME hack: embed scopeid */
3923 	if (newaddr->sa_family == AF_INET6) {
3924 		struct sockaddr_in6 *sin6;
3925 
3926 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3927 		(void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3928 		sin6->sin6_scope_id = 0;
3929 	}
3930 #endif
3931 	SCTP_RTALLOC((sctp_route_t *)&net->ro,
3932 	    stcb->asoc.vrf_id,
3933 	    stcb->sctp_ep->fibnum);
3934 
3935 	net->src_addr_selected = 0;
3936 	if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3937 		/* Get source address */
3938 		net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3939 		    stcb,
3940 		    (sctp_route_t *)&net->ro,
3941 		    net,
3942 		    0,
3943 		    stcb->asoc.vrf_id);
3944 		if (stcb->asoc.default_mtu > 0) {
3945 			net->mtu = stcb->asoc.default_mtu;
3946 			switch (net->ro._l_addr.sa.sa_family) {
3947 #ifdef INET
3948 			case AF_INET:
3949 				net->mtu += SCTP_MIN_V4_OVERHEAD;
3950 				break;
3951 #endif
3952 #ifdef INET6
3953 			case AF_INET6:
3954 				net->mtu += SCTP_MIN_OVERHEAD;
3955 				break;
3956 #endif
3957 			default:
3958 				break;
3959 			}
3960 #if defined(INET) || defined(INET6)
3961 			if (net->port) {
3962 				net->mtu += (uint32_t)sizeof(struct udphdr);
3963 			}
3964 #endif
3965 		} else if (net->ro._s_addr != NULL) {
3966 			uint32_t imtu, rmtu, hcmtu;
3967 
3968 			net->src_addr_selected = 1;
3969 			/* Now get the interface MTU */
3970 			if (net->ro._s_addr->ifn_p != NULL) {
3971 				imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3972 			} else {
3973 				imtu = 0;
3974 			}
3975 			rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
3976 			hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3977 			net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3978 		}
3979 	}
3980 	if (net->mtu == 0) {
3981 		if (stcb->asoc.default_mtu > 0) {
3982 			net->mtu = stcb->asoc.default_mtu;
3983 			switch (net->ro._l_addr.sa.sa_family) {
3984 #ifdef INET
3985 			case AF_INET:
3986 				net->mtu += SCTP_MIN_V4_OVERHEAD;
3987 				break;
3988 #endif
3989 #ifdef INET6
3990 			case AF_INET6:
3991 				net->mtu += SCTP_MIN_OVERHEAD;
3992 				break;
3993 #endif
3994 			default:
3995 				break;
3996 			}
3997 #if defined(INET) || defined(INET6)
3998 			if (net->port) {
3999 				net->mtu += (uint32_t)sizeof(struct udphdr);
4000 			}
4001 #endif
4002 		} else {
4003 			switch (newaddr->sa_family) {
4004 #ifdef INET
4005 			case AF_INET:
4006 				net->mtu = SCTP_DEFAULT_MTU;
4007 				break;
4008 #endif
4009 #ifdef INET6
4010 			case AF_INET6:
4011 				net->mtu = 1280;
4012 				break;
4013 #endif
4014 			default:
4015 				break;
4016 			}
4017 		}
4018 	}
4019 #if defined(INET) || defined(INET6)
4020 	if (net->port) {
4021 		net->mtu -= (uint32_t)sizeof(struct udphdr);
4022 	}
4023 #endif
4024 	if (from == SCTP_ALLOC_ASOC) {
4025 		stcb->asoc.smallest_mtu = net->mtu;
4026 	}
4027 	if (stcb->asoc.smallest_mtu > net->mtu) {
4028 		sctp_pathmtu_adjustment(stcb, net->mtu);
4029 	}
4030 #ifdef INET6
4031 	if (newaddr->sa_family == AF_INET6) {
4032 		struct sockaddr_in6 *sin6;
4033 
4034 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4035 		(void)sa6_recoverscope(sin6);
4036 	}
4037 #endif
4038 
4039 	/* JRS - Use the congestion control given in the CC module */
4040 	if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4041 		(*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4042 
4043 	/*
4044 	 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4045 	 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4046 	 */
4047 	net->find_pseudo_cumack = 1;
4048 	net->find_rtx_pseudo_cumack = 1;
4049 	/* Choose an initial flowid. */
4050 	net->flowid = stcb->asoc.my_vtag ^
4051 	    ntohs(stcb->rport) ^
4052 	    ntohs(stcb->sctp_ep->sctp_lport);
4053 	net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4054 	if (netp) {
4055 		*netp = net;
4056 	}
4057 	netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4058 	if (net->ro.ro_nh == NULL) {
4059 		/* Since we have no route put it at the back */
4060 		TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4061 	} else if (netfirst == NULL) {
4062 		/* We are the first one in the pool. */
4063 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4064 	} else if (netfirst->ro.ro_nh == NULL) {
4065 		/*
4066 		 * First one has NO route. Place this one ahead of the first
4067 		 * one.
4068 		 */
4069 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4070 	} else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4071 		/*
4072 		 * This one has a different interface than the one at the
4073 		 * top of the list. Place it ahead.
4074 		 */
4075 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4076 	} else {
4077 		/*
4078 		 * Ok we have the same interface as the first one. Move
4079 		 * forward until we find either a) one with a NULL route...
4080 		 * insert ahead of that b) one with a different ifp.. insert
4081 		 * after that. c) end of the list.. insert at the tail.
4082 		 */
4083 		struct sctp_nets *netlook;
4084 
4085 		do {
4086 			netlook = TAILQ_NEXT(netfirst, sctp_next);
4087 			if (netlook == NULL) {
4088 				/* End of the list */
4089 				TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4090 				break;
4091 			} else if (netlook->ro.ro_nh == NULL) {
4092 				/* next one has NO route */
4093 				TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4094 				break;
4095 			} else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4096 				TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4097 				    net, sctp_next);
4098 				break;
4099 			}
4100 			/* Shift forward */
4101 			netfirst = netlook;
4102 		} while (netlook != NULL);
4103 	}
4104 
4105 	/* got to have a primary set */
4106 	if (stcb->asoc.primary_destination == 0) {
4107 		stcb->asoc.primary_destination = net;
4108 	} else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4109 		    (net->ro.ro_nh) &&
4110 	    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4111 		/* No route to current primary adopt new primary */
4112 		stcb->asoc.primary_destination = net;
4113 	}
4114 	/* Validate primary is first */
4115 	net = TAILQ_FIRST(&stcb->asoc.nets);
4116 	if ((net != stcb->asoc.primary_destination) &&
4117 	    (stcb->asoc.primary_destination)) {
4118 		/*
4119 		 * first one on the list is NOT the primary sctp_cmpaddr()
4120 		 * is much more efficient if the primary is the first on the
4121 		 * list, make it so.
4122 		 */
4123 		TAILQ_REMOVE(&stcb->asoc.nets,
4124 		    stcb->asoc.primary_destination, sctp_next);
4125 		TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4126 		    stcb->asoc.primary_destination, sctp_next);
4127 	}
4128 	return (0);
4129 }
4130 
4131 static uint32_t
4132 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4133 {
4134 	uint32_t id;
4135 	struct sctpasochead *head;
4136 	struct sctp_tcb *lstcb;
4137 
4138 try_again:
4139 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4140 		/* TSNH */
4141 		return (0);
4142 	}
4143 	/*
4144 	 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4145 	 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4146 	 */
4147 	if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4148 		inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4149 	}
4150 	id = inp->sctp_associd_counter;
4151 	inp->sctp_associd_counter++;
4152 	lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4153 	if (lstcb) {
4154 		goto try_again;
4155 	}
4156 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4157 	LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4158 	stcb->asoc.in_asocid_hash = 1;
4159 	return (id);
4160 }
4161 
4162 /*
4163  * allocate an association and add it to the endpoint. The caller must be
4164  * careful to add all additional addresses once they are know right away or
4165  * else the assoc will be may experience a blackout scenario.
4166  */
4167 static struct sctp_tcb *
4168 sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4169     int *error, uint32_t override_tag, uint32_t initial_tsn,
4170     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4171     struct thread *p,
4172     int initialize_auth_params)
4173 {
4174 	/* note the p argument is only valid in unbound sockets */
4175 
4176 	struct sctp_tcb *stcb;
4177 	struct sctp_association *asoc;
4178 	struct sctpasochead *head;
4179 	uint16_t rport;
4180 	int err;
4181 
4182 	SCTP_INP_INFO_WLOCK_ASSERT();
4183 	SCTP_INP_WLOCK_ASSERT(inp);
4184 
4185 	/*
4186 	 * Assumption made here: Caller has done a
4187 	 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4188 	 * address does not exist already.
4189 	 */
4190 	if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4191 		/* Hit max assoc, sorry no more */
4192 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4193 		*error = ENOBUFS;
4194 		return (NULL);
4195 	}
4196 	if (firstaddr == NULL) {
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_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4202 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4203 		*error = EINVAL;
4204 		return (NULL);
4205 	}
4206 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4207 	    ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4208 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4209 		/*
4210 		 * If its in the TCP pool, its NOT allowed to create an
4211 		 * association. The parent listener needs to call
4212 		 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4213 		 * off, or connected one does this.. its an error.
4214 		 */
4215 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4216 		*error = EINVAL;
4217 		return (NULL);
4218 	}
4219 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4220 	    (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4221 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4222 		    (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4223 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224 			*error = EINVAL;
4225 			return (NULL);
4226 		}
4227 	}
4228 	SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4229 #ifdef SCTP_DEBUG
4230 	if (firstaddr) {
4231 		SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4232 		switch (firstaddr->sa_family) {
4233 #ifdef INET
4234 		case AF_INET:
4235 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4236 			    ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4237 			break;
4238 #endif
4239 #ifdef INET6
4240 		case AF_INET6:
4241 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4242 			    ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4243 			break;
4244 #endif
4245 		default:
4246 			break;
4247 		}
4248 	} else {
4249 		SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4250 	}
4251 #endif				/* SCTP_DEBUG */
4252 	switch (firstaddr->sa_family) {
4253 #ifdef INET
4254 	case AF_INET:
4255 		{
4256 			struct sockaddr_in *sin;
4257 
4258 			sin = (struct sockaddr_in *)firstaddr;
4259 			if ((ntohs(sin->sin_port) == 0) ||
4260 			    (sin->sin_addr.s_addr == INADDR_ANY) ||
4261 			    (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4262 			    IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) ||
4263 			    (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) != 0) &&
4264 			    (SCTP_IPV6_V6ONLY(inp) != 0))) {
4265 				/* Invalid address */
4266 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4267 				*error = EINVAL;
4268 				return (NULL);
4269 			}
4270 			rport = sin->sin_port;
4271 			break;
4272 		}
4273 #endif
4274 #ifdef INET6
4275 	case AF_INET6:
4276 		{
4277 			struct sockaddr_in6 *sin6;
4278 
4279 			sin6 = (struct sockaddr_in6 *)firstaddr;
4280 			if ((ntohs(sin6->sin6_port) == 0) ||
4281 			    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4282 			    IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) ||
4283 			    ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) {
4284 				/* Invalid address */
4285 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4286 				*error = EINVAL;
4287 				return (NULL);
4288 			}
4289 			rport = sin6->sin6_port;
4290 			break;
4291 		}
4292 #endif
4293 	default:
4294 		/* not supported family type */
4295 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4296 		*error = EINVAL;
4297 		return (NULL);
4298 	}
4299 	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4300 		/*
4301 		 * If you have not performed a bind, then we need to do the
4302 		 * ephemeral bind for you.
4303 		 */
4304 		if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) {
4305 			/* bind error, probably perm */
4306 			*error = err;
4307 			return (NULL);
4308 		}
4309 	}
4310 	stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4311 	if (stcb == NULL) {
4312 		/* out of memory? */
4313 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4314 		*error = ENOMEM;
4315 		return (NULL);
4316 	}
4317 	SCTP_INCR_ASOC_COUNT();
4318 
4319 	memset(stcb, 0, sizeof(*stcb));
4320 	asoc = &stcb->asoc;
4321 
4322 	SCTP_TCB_LOCK_INIT(stcb);
4323 	SCTP_TCB_SEND_LOCK_INIT(stcb);
4324 	stcb->rport = rport;
4325 	/* setup back pointer's */
4326 	stcb->sctp_ep = inp;
4327 	stcb->sctp_socket = inp->sctp_socket;
4328 	if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) {
4329 		/* failed */
4330 		SCTP_TCB_LOCK_DESTROY(stcb);
4331 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4332 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4333 		SCTP_DECR_ASOC_COUNT();
4334 		*error = err;
4335 		return (NULL);
4336 	}
4337 	SCTP_TCB_LOCK(stcb);
4338 
4339 	asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4340 	/* now that my_vtag is set, add it to the hash */
4341 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4342 	/* put it in the bucket in the vtag hash of assoc's for the system */
4343 	LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4344 
4345 	if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) {
4346 		/* failure.. memory error? */
4347 		if (asoc->strmout) {
4348 			SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4349 			asoc->strmout = NULL;
4350 		}
4351 		if (asoc->mapping_array) {
4352 			SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4353 			asoc->mapping_array = NULL;
4354 		}
4355 		if (asoc->nr_mapping_array) {
4356 			SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4357 			asoc->nr_mapping_array = NULL;
4358 		}
4359 		SCTP_DECR_ASOC_COUNT();
4360 		SCTP_TCB_UNLOCK(stcb);
4361 		SCTP_TCB_LOCK_DESTROY(stcb);
4362 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4363 		LIST_REMOVE(stcb, sctp_asocs);
4364 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4365 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4366 		SCTP_INP_WUNLOCK(inp);
4367 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4368 		*error = ENOBUFS;
4369 		return (NULL);
4370 	}
4371 	/* Init all the timers */
4372 	SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4373 	SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4374 	SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4375 	SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4376 	SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4377 	SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4378 
4379 	LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4380 	/* now file the port under the hash as well */
4381 	if (inp->sctp_tcbhash != NULL) {
4382 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4383 		    inp->sctp_hashmark)];
4384 		LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4385 	}
4386 	if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4387 		sctp_initialize_auth_params(inp, stcb);
4388 	}
4389 	SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4390 	return (stcb);
4391 }
4392 
4393 struct sctp_tcb *
4394 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4395     int *error, uint32_t override_tag, uint32_t initial_tsn,
4396     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4397     struct thread *p,
4398     int initialize_auth_params)
4399 {
4400 	struct sctp_tcb *stcb;
4401 
4402 	SCTP_INP_INFO_WLOCK();
4403 	SCTP_INP_WLOCK(inp);
4404 	stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4405 	    initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4406 	SCTP_INP_INFO_WUNLOCK();
4407 	SCTP_INP_WUNLOCK(inp);
4408 	return (stcb);
4409 }
4410 
4411 struct sctp_tcb *
4412 sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4413     int *error, uint32_t override_tag, uint32_t initial_tsn,
4414     uint32_t vrf_id, uint16_t o_streams, uint16_t port,
4415     struct thread *p,
4416     int initialize_auth_params)
4417 {
4418 	struct sctp_tcb *stcb;
4419 
4420 	SCTP_INP_INFO_WLOCK();
4421 	SCTP_INP_WLOCK(inp);
4422 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4423 	    SCTP_IS_LISTENING(inp)) {
4424 		SCTP_INP_INFO_WUNLOCK();
4425 		SCTP_INP_WUNLOCK(inp);
4426 		*error = EINVAL;
4427 		return (NULL);
4428 	}
4429 	stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag,
4430 	    initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params);
4431 	SCTP_INP_INFO_WUNLOCK();
4432 	if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4433 		inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
4434 		soisconnecting(inp->sctp_socket);
4435 	}
4436 	SCTP_INP_WUNLOCK(inp);
4437 	return (stcb);
4438 }
4439 
4440 void
4441 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4442 {
4443 	struct sctp_inpcb *inp;
4444 	struct sctp_association *asoc;
4445 
4446 	inp = stcb->sctp_ep;
4447 	asoc = &stcb->asoc;
4448 	asoc->numnets--;
4449 	TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4450 	if (net == asoc->primary_destination) {
4451 		/* Reset primary */
4452 		struct sctp_nets *lnet;
4453 
4454 		lnet = TAILQ_FIRST(&asoc->nets);
4455 		/*
4456 		 * Mobility adaptation Ideally, if deleted destination is
4457 		 * the primary, it becomes a fast retransmission trigger by
4458 		 * the subsequent SET PRIMARY. (by micchie)
4459 		 */
4460 		if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4461 		    SCTP_MOBILITY_BASE) ||
4462 		    sctp_is_mobility_feature_on(stcb->sctp_ep,
4463 		    SCTP_MOBILITY_FASTHANDOFF)) {
4464 			SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4465 			if (asoc->deleted_primary != NULL) {
4466 				SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4467 				goto out;
4468 			}
4469 			asoc->deleted_primary = net;
4470 			atomic_add_int(&net->ref_count, 1);
4471 			memset(&net->lastsa, 0, sizeof(net->lastsa));
4472 			memset(&net->lastsv, 0, sizeof(net->lastsv));
4473 			sctp_mobility_feature_on(stcb->sctp_ep,
4474 			    SCTP_MOBILITY_PRIM_DELETED);
4475 			sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4476 			    stcb->sctp_ep, stcb, NULL);
4477 		}
4478 out:
4479 		/* Try to find a confirmed primary */
4480 		asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4481 	}
4482 	if (net == asoc->last_data_chunk_from) {
4483 		/* Reset primary */
4484 		asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4485 	}
4486 	if (net == asoc->last_control_chunk_from) {
4487 		/* Clear net */
4488 		asoc->last_control_chunk_from = NULL;
4489 	}
4490 	if (net == asoc->last_net_cmt_send_started) {
4491 		/* Clear net */
4492 		asoc->last_net_cmt_send_started = NULL;
4493 	}
4494 	if (net == stcb->asoc.alternate) {
4495 		sctp_free_remote_addr(stcb->asoc.alternate);
4496 		stcb->asoc.alternate = NULL;
4497 	}
4498 	sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4499 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4500 	sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4501 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4502 	net->dest_state |= SCTP_ADDR_BEING_DELETED;
4503 	sctp_free_remote_addr(net);
4504 }
4505 
4506 /*
4507  * remove a remote endpoint address from an association, it will fail if the
4508  * address does not exist.
4509  */
4510 int
4511 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4512 {
4513 	/*
4514 	 * Here we need to remove a remote address. This is quite simple, we
4515 	 * first find it in the list of address for the association
4516 	 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4517 	 * on that item. Note we do not allow it to be removed if there are
4518 	 * no other addresses.
4519 	 */
4520 	struct sctp_association *asoc;
4521 	struct sctp_nets *net, *nnet;
4522 
4523 	asoc = &stcb->asoc;
4524 
4525 	/* locate the address */
4526 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4527 		if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4528 			continue;
4529 		}
4530 		if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4531 		    remaddr)) {
4532 			/* we found the guy */
4533 			if (asoc->numnets < 2) {
4534 				/* Must have at LEAST two remote addresses */
4535 				return (-1);
4536 			} else {
4537 				sctp_remove_net(stcb, net);
4538 				return (0);
4539 			}
4540 		}
4541 	}
4542 	/* not found. */
4543 	return (-2);
4544 }
4545 
4546 static bool
4547 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now)
4548 {
4549 	struct sctpvtaghead *chain;
4550 	struct sctp_tagblock *twait_block;
4551 	int i;
4552 
4553 	SCTP_INP_INFO_LOCK_ASSERT();
4554 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4555 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4556 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4557 			if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) &&
4558 			    (twait_block->vtag_block[i].v_tag == tag) &&
4559 			    (twait_block->vtag_block[i].lport == lport) &&
4560 			    (twait_block->vtag_block[i].rport == rport)) {
4561 				return (true);
4562 			}
4563 		}
4564 	}
4565 	return (false);
4566 }
4567 
4568 static void
4569 sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time,
4570     uint32_t tag, uint16_t lport, uint16_t rport)
4571 {
4572 	vtag_block->tv_sec_at_expire = time;
4573 	vtag_block->v_tag = tag;
4574 	vtag_block->lport = lport;
4575 	vtag_block->rport = rport;
4576 }
4577 
4578 static void
4579 sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4580 {
4581 	struct sctpvtaghead *chain;
4582 	struct sctp_tagblock *twait_block;
4583 	struct timeval now;
4584 	uint32_t time;
4585 	int i;
4586 	bool set;
4587 
4588 	SCTP_INP_INFO_WLOCK_ASSERT();
4589 	(void)SCTP_GETTIME_TIMEVAL(&now);
4590 	time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait);
4591 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4592 	set = false;
4593 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4594 		/* Block(s) present, lets find space, and expire on the fly */
4595 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4596 			if ((twait_block->vtag_block[i].v_tag == 0) && !set) {
4597 				sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4598 				set = true;
4599 				continue;
4600 			}
4601 			if ((twait_block->vtag_block[i].v_tag != 0) &&
4602 			    (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) {
4603 				if (set) {
4604 					/* Audit expires this guy */
4605 					sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0);
4606 				} else {
4607 					/* Reuse it for the new tag */
4608 					sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport);
4609 					set = true;
4610 				}
4611 			}
4612 		}
4613 		if (set) {
4614 			/*
4615 			 * We only do up to the block where we can place our
4616 			 * tag for audits
4617 			 */
4618 			break;
4619 		}
4620 	}
4621 	/* Need to add a new block to chain */
4622 	if (!set) {
4623 		SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4624 		    sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4625 		if (twait_block == NULL) {
4626 			return;
4627 		}
4628 		memset(twait_block, 0, sizeof(struct sctp_tagblock));
4629 		LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4630 		sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport);
4631 	}
4632 }
4633 
4634 void
4635 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4636 {
4637 	struct sctp_tmit_chunk *chk, *nchk;
4638 	struct sctp_queued_to_read *control, *ncontrol;
4639 
4640 	TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4641 		TAILQ_REMOVE(rh, control, next_instrm);
4642 		control->on_strm_q = 0;
4643 		if (control->on_read_q == 0) {
4644 			sctp_free_remote_addr(control->whoFrom);
4645 			if (control->data) {
4646 				sctp_m_freem(control->data);
4647 				control->data = NULL;
4648 			}
4649 		}
4650 		/* Reassembly free? */
4651 		TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4652 			TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4653 			if (chk->data) {
4654 				sctp_m_freem(chk->data);
4655 				chk->data = NULL;
4656 			}
4657 			if (chk->holds_key_ref)
4658 				sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4659 			sctp_free_remote_addr(chk->whoTo);
4660 			SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4661 			SCTP_DECR_CHK_COUNT();
4662 			/* sa_ignore FREED_MEMORY */
4663 		}
4664 		/*
4665 		 * We don't free the address here since all the net's were
4666 		 * freed above.
4667 		 */
4668 		if (control->on_read_q == 0) {
4669 			sctp_free_a_readq(stcb, control);
4670 		}
4671 	}
4672 }
4673 
4674 /*-
4675  * Free the association after un-hashing the remote port. This
4676  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4677  * expect that the input to this function IS a locked TCB.
4678  * It will return 0, if it did NOT destroy the association (instead
4679  * it unlocks it. It will return NON-zero if it either destroyed the
4680  * association OR the association is already destroyed.
4681  */
4682 int
4683 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4684 {
4685 	int i;
4686 	struct sctp_association *asoc;
4687 	struct sctp_nets *net, *nnet;
4688 	struct sctp_laddr *laddr, *naddr;
4689 	struct sctp_tmit_chunk *chk, *nchk;
4690 	struct sctp_asconf_addr *aparam, *naparam;
4691 	struct sctp_asconf_ack *aack, *naack;
4692 	struct sctp_stream_reset_list *strrst, *nstrrst;
4693 	struct sctp_queued_to_read *sq, *nsq;
4694 	struct sctp_stream_queue_pending *sp, *nsp;
4695 	sctp_sharedkey_t *shared_key, *nshared_key;
4696 	struct socket *so;
4697 
4698 	/* first, lets purge the entry from the hash table. */
4699 
4700 #ifdef SCTP_LOG_CLOSING
4701 	sctp_log_closing(inp, stcb, 6);
4702 #endif
4703 	if (stcb->asoc.state == 0) {
4704 #ifdef SCTP_LOG_CLOSING
4705 		sctp_log_closing(inp, NULL, 7);
4706 #endif
4707 		/* there is no asoc, really TSNH :-0 */
4708 		return (1);
4709 	}
4710 	SCTP_TCB_SEND_LOCK(stcb);
4711 	if (stcb->asoc.alternate) {
4712 		sctp_free_remote_addr(stcb->asoc.alternate);
4713 		stcb->asoc.alternate = NULL;
4714 	}
4715 	/* TEMP CODE */
4716 	if (stcb->freed_from_where == 0) {
4717 		/* Only record the first place free happened from */
4718 		stcb->freed_from_where = from_location;
4719 	}
4720 	/* TEMP CODE */
4721 
4722 	asoc = &stcb->asoc;
4723 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4724 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4725 		/* nothing around */
4726 		so = NULL;
4727 	else
4728 		so = inp->sctp_socket;
4729 
4730 	/*
4731 	 * We used timer based freeing if a reader or writer is in the way.
4732 	 * So we first check if we are actually being called from a timer,
4733 	 * if so we abort early if a reader or writer is still in the way.
4734 	 */
4735 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4736 	    (from_inpcbfree == SCTP_NORMAL_PROC)) {
4737 		/*
4738 		 * is it the timer driving us? if so are the reader/writers
4739 		 * gone?
4740 		 */
4741 		if (stcb->asoc.refcnt) {
4742 			/* nope, reader or writer in the way */
4743 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4744 			/* no asoc destroyed */
4745 			SCTP_TCB_SEND_UNLOCK(stcb);
4746 			SCTP_TCB_UNLOCK(stcb);
4747 #ifdef SCTP_LOG_CLOSING
4748 			sctp_log_closing(inp, stcb, 8);
4749 #endif
4750 			return (0);
4751 		}
4752 	}
4753 	/* Now clean up any other timers */
4754 	sctp_stop_association_timers(stcb, false);
4755 	/* Now the read queue needs to be cleaned up (only once) */
4756 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4757 		SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4758 		SCTP_INP_READ_LOCK(inp);
4759 		TAILQ_FOREACH(sq, &inp->read_queue, next) {
4760 			if (sq->stcb == stcb) {
4761 				sq->do_not_ref_stcb = 1;
4762 				sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4763 				/*
4764 				 * If there is no end, there never will be
4765 				 * now.
4766 				 */
4767 				if (sq->end_added == 0) {
4768 					/* Held for PD-API clear that. */
4769 					sq->pdapi_aborted = 1;
4770 					sq->held_length = 0;
4771 					if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4772 						/*
4773 						 * Need to add a PD-API
4774 						 * aborted indication.
4775 						 * Setting the control_pdapi
4776 						 * assures that it will be
4777 						 * added right after this
4778 						 * msg.
4779 						 */
4780 						uint32_t strseq;
4781 
4782 						stcb->asoc.control_pdapi = sq;
4783 						strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4784 						sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4785 						    stcb,
4786 						    SCTP_PARTIAL_DELIVERY_ABORTED,
4787 						    (void *)&strseq,
4788 						    SCTP_SO_LOCKED);
4789 						stcb->asoc.control_pdapi = NULL;
4790 					}
4791 				}
4792 				/* Add an end to wake them */
4793 				sq->end_added = 1;
4794 			}
4795 		}
4796 		SCTP_INP_READ_UNLOCK(inp);
4797 		if (stcb->block_entry) {
4798 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4799 			stcb->block_entry->error = ECONNRESET;
4800 			stcb->block_entry = NULL;
4801 		}
4802 	}
4803 	if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4804 		/*
4805 		 * Someone holds a reference OR the socket is unaccepted
4806 		 * yet.
4807 		 */
4808 		if ((stcb->asoc.refcnt) ||
4809 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4810 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4811 			SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4812 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4813 		}
4814 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4815 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4816 			/* nothing around */
4817 			so = NULL;
4818 		if (so) {
4819 			/* Wake any reader/writers */
4820 			sctp_sorwakeup(inp, so);
4821 			sctp_sowwakeup(inp, so);
4822 		}
4823 		SCTP_TCB_SEND_UNLOCK(stcb);
4824 		SCTP_TCB_UNLOCK(stcb);
4825 
4826 #ifdef SCTP_LOG_CLOSING
4827 		sctp_log_closing(inp, stcb, 9);
4828 #endif
4829 		/* no asoc destroyed */
4830 		return (0);
4831 	}
4832 #ifdef SCTP_LOG_CLOSING
4833 	sctp_log_closing(inp, stcb, 10);
4834 #endif
4835 	/*
4836 	 * When I reach here, no others want to kill the assoc yet.. and I
4837 	 * own the lock. Now its possible an abort comes in when I do the
4838 	 * lock exchange below to grab all the locks to do the final take
4839 	 * out. to prevent this we increment the count, which will start a
4840 	 * timer and blow out above thus assuring us that we hold exclusive
4841 	 * killing of the asoc. Note that after getting back the TCB lock we
4842 	 * will go ahead and increment the counter back up and stop any
4843 	 * timer a passing stranger may have started :-S
4844 	 */
4845 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4846 		atomic_add_int(&stcb->asoc.refcnt, 1);
4847 
4848 		SCTP_TCB_SEND_UNLOCK(stcb);
4849 		SCTP_TCB_UNLOCK(stcb);
4850 		SCTP_INP_INFO_WLOCK();
4851 		SCTP_INP_WLOCK(inp);
4852 		SCTP_TCB_LOCK(stcb);
4853 		SCTP_TCB_SEND_LOCK(stcb);
4854 	}
4855 	/* Double check the GONE flag */
4856 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4857 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4858 		/* nothing around */
4859 		so = NULL;
4860 
4861 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4862 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4863 		/*
4864 		 * For TCP type we need special handling when we are
4865 		 * connected. We also include the peel'ed off ones to.
4866 		 */
4867 		if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4868 			inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4869 			inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4870 			if (so) {
4871 				SOCKBUF_LOCK(&so->so_rcv);
4872 				so->so_state &= ~(SS_ISCONNECTING |
4873 				    SS_ISDISCONNECTING |
4874 				    SS_ISCONFIRMING |
4875 				    SS_ISCONNECTED);
4876 				so->so_state |= SS_ISDISCONNECTED;
4877 				socantrcvmore_locked(so);
4878 				socantsendmore(so);
4879 				sctp_sowwakeup(inp, so);
4880 				sctp_sorwakeup(inp, so);
4881 				SCTP_SOWAKEUP(so);
4882 			}
4883 		}
4884 	}
4885 
4886 	/*
4887 	 * Make it invalid too, that way if its about to run it will abort
4888 	 * and return.
4889 	 */
4890 	/* re-increment the lock */
4891 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4892 		atomic_subtract_int(&stcb->asoc.refcnt, 1);
4893 	}
4894 	if (stcb->asoc.refcnt) {
4895 		SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4896 		sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4897 		if (from_inpcbfree == SCTP_NORMAL_PROC) {
4898 			SCTP_INP_INFO_WUNLOCK();
4899 			SCTP_INP_WUNLOCK(inp);
4900 		}
4901 		SCTP_TCB_SEND_UNLOCK(stcb);
4902 		SCTP_TCB_UNLOCK(stcb);
4903 		return (0);
4904 	}
4905 	asoc->state = 0;
4906 	if (inp->sctp_tcbhash) {
4907 		LIST_REMOVE(stcb, sctp_tcbhash);
4908 	}
4909 	if (stcb->asoc.in_asocid_hash) {
4910 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4911 	}
4912 	if (inp->sctp_socket == NULL) {
4913 		stcb->sctp_socket = NULL;
4914 	}
4915 	/* Now lets remove it from the list of ALL associations in the EP */
4916 	LIST_REMOVE(stcb, sctp_tcblist);
4917 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4918 		SCTP_INP_INCR_REF(inp);
4919 		SCTP_INP_WUNLOCK(inp);
4920 	}
4921 	/* pull from vtag hash */
4922 	LIST_REMOVE(stcb, sctp_asocs);
4923 	sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport);
4924 
4925 	/*
4926 	 * Now restop the timers to be sure this is paranoia at is finest!
4927 	 */
4928 	sctp_stop_association_timers(stcb, true);
4929 
4930 	/*
4931 	 * The chunk lists and such SHOULD be empty but we check them just
4932 	 * in case.
4933 	 */
4934 	/* anything on the wheel needs to be removed */
4935 	for (i = 0; i < asoc->streamoutcnt; i++) {
4936 		struct sctp_stream_out *outs;
4937 
4938 		outs = &asoc->strmout[i];
4939 		/* now clean up any chunks here */
4940 		TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4941 			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4942 			TAILQ_REMOVE(&outs->outqueue, sp, next);
4943 			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
4944 			sctp_free_spbufspace(stcb, asoc, sp);
4945 			if (sp->data) {
4946 				if (so) {
4947 					/* Still an open socket - report */
4948 					sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4949 					    0, (void *)sp, SCTP_SO_LOCKED);
4950 				}
4951 				if (sp->data) {
4952 					sctp_m_freem(sp->data);
4953 					sp->data = NULL;
4954 					sp->tail_mbuf = NULL;
4955 					sp->length = 0;
4956 				}
4957 			}
4958 			if (sp->net) {
4959 				sctp_free_remote_addr(sp->net);
4960 				sp->net = NULL;
4961 			}
4962 			sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4963 		}
4964 	}
4965 	/* sa_ignore FREED_MEMORY */
4966 	TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4967 		TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4968 		SCTP_FREE(strrst, SCTP_M_STRESET);
4969 	}
4970 	TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4971 		TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4972 		if (sq->data) {
4973 			sctp_m_freem(sq->data);
4974 			sq->data = NULL;
4975 		}
4976 		sctp_free_remote_addr(sq->whoFrom);
4977 		sq->whoFrom = NULL;
4978 		sq->stcb = NULL;
4979 		/* Free the ctl entry */
4980 		sctp_free_a_readq(stcb, sq);
4981 		/* sa_ignore FREED_MEMORY */
4982 	}
4983 	TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4984 		TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4985 		if (chk->data) {
4986 			sctp_m_freem(chk->data);
4987 			chk->data = NULL;
4988 		}
4989 		if (chk->holds_key_ref)
4990 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4991 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4992 		SCTP_DECR_CHK_COUNT();
4993 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4994 		asoc->free_chunk_cnt--;
4995 		/* sa_ignore FREED_MEMORY */
4996 	}
4997 	/* pending send queue SHOULD be empty */
4998 	TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4999 		if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5000 			asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5001 #ifdef INVARIANTS
5002 		} else {
5003 			panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5004 #endif
5005 		}
5006 		TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5007 		if (chk->data) {
5008 			if (so) {
5009 				/* Still a socket? */
5010 				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5011 				    0, chk, SCTP_SO_LOCKED);
5012 			}
5013 			if (chk->data) {
5014 				sctp_m_freem(chk->data);
5015 				chk->data = NULL;
5016 			}
5017 		}
5018 		if (chk->holds_key_ref)
5019 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5020 		if (chk->whoTo) {
5021 			sctp_free_remote_addr(chk->whoTo);
5022 			chk->whoTo = NULL;
5023 		}
5024 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5025 		SCTP_DECR_CHK_COUNT();
5026 		/* sa_ignore FREED_MEMORY */
5027 	}
5028 	/* sent queue SHOULD be empty */
5029 	TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5030 		if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5031 			if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5032 				asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5033 #ifdef INVARIANTS
5034 			} else {
5035 				panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5036 #endif
5037 			}
5038 		}
5039 		TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5040 		if (chk->data) {
5041 			if (so) {
5042 				/* Still a socket? */
5043 				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5044 				    0, chk, SCTP_SO_LOCKED);
5045 			}
5046 			if (chk->data) {
5047 				sctp_m_freem(chk->data);
5048 				chk->data = NULL;
5049 			}
5050 		}
5051 		if (chk->holds_key_ref)
5052 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5053 		sctp_free_remote_addr(chk->whoTo);
5054 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5055 		SCTP_DECR_CHK_COUNT();
5056 		/* sa_ignore FREED_MEMORY */
5057 	}
5058 #ifdef INVARIANTS
5059 	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5060 		if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5061 			panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5062 		}
5063 	}
5064 #endif
5065 	/* control queue MAY not be empty */
5066 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5067 		TAILQ_REMOVE(&asoc->control_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 	/* ASCONF queue MAY not be empty */
5080 	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5081 		TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5082 		if (chk->data) {
5083 			sctp_m_freem(chk->data);
5084 			chk->data = NULL;
5085 		}
5086 		if (chk->holds_key_ref)
5087 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5088 		sctp_free_remote_addr(chk->whoTo);
5089 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5090 		SCTP_DECR_CHK_COUNT();
5091 		/* sa_ignore FREED_MEMORY */
5092 	}
5093 	if (asoc->mapping_array) {
5094 		SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5095 		asoc->mapping_array = NULL;
5096 	}
5097 	if (asoc->nr_mapping_array) {
5098 		SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5099 		asoc->nr_mapping_array = NULL;
5100 	}
5101 	/* the stream outs */
5102 	if (asoc->strmout) {
5103 		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5104 		asoc->strmout = NULL;
5105 	}
5106 	asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5107 	if (asoc->strmin) {
5108 		for (i = 0; i < asoc->streamincnt; i++) {
5109 			sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5110 			sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5111 		}
5112 		SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5113 		asoc->strmin = NULL;
5114 	}
5115 	asoc->streamincnt = 0;
5116 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5117 #ifdef INVARIANTS
5118 		if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5119 			panic("no net's left alloc'ed, or list points to itself");
5120 		}
5121 #endif
5122 		TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5123 		sctp_free_remote_addr(net);
5124 	}
5125 	LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5126 		/* sa_ignore FREED_MEMORY */
5127 		sctp_remove_laddr(laddr);
5128 	}
5129 
5130 	/* pending asconf (address) parameters */
5131 	TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5132 		/* sa_ignore FREED_MEMORY */
5133 		TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5134 		SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5135 	}
5136 	TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5137 		/* sa_ignore FREED_MEMORY */
5138 		TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5139 		if (aack->data != NULL) {
5140 			sctp_m_freem(aack->data);
5141 		}
5142 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5143 	}
5144 	/* clean up auth stuff */
5145 	if (asoc->local_hmacs)
5146 		sctp_free_hmaclist(asoc->local_hmacs);
5147 	if (asoc->peer_hmacs)
5148 		sctp_free_hmaclist(asoc->peer_hmacs);
5149 
5150 	if (asoc->local_auth_chunks)
5151 		sctp_free_chunklist(asoc->local_auth_chunks);
5152 	if (asoc->peer_auth_chunks)
5153 		sctp_free_chunklist(asoc->peer_auth_chunks);
5154 
5155 	sctp_free_authinfo(&asoc->authinfo);
5156 
5157 	LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5158 		LIST_REMOVE(shared_key, next);
5159 		sctp_free_sharedkey(shared_key);
5160 		/* sa_ignore FREED_MEMORY */
5161 	}
5162 
5163 	/* Insert new items here :> */
5164 
5165 	/* Get rid of LOCK */
5166 	SCTP_TCB_SEND_UNLOCK(stcb);
5167 	SCTP_TCB_UNLOCK(stcb);
5168 	SCTP_TCB_LOCK_DESTROY(stcb);
5169 	SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5170 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5171 		SCTP_INP_INFO_WUNLOCK();
5172 		SCTP_INP_RLOCK(inp);
5173 	}
5174 #ifdef SCTP_TRACK_FREED_ASOCS
5175 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5176 		/* now clean up the tasoc itself */
5177 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5178 		SCTP_DECR_ASOC_COUNT();
5179 	} else {
5180 		LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5181 	}
5182 #else
5183 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5184 	SCTP_DECR_ASOC_COUNT();
5185 #endif
5186 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5187 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5188 			/*
5189 			 * If its NOT the inp_free calling us AND sctp_close
5190 			 * as been called, we call back...
5191 			 */
5192 			SCTP_INP_RUNLOCK(inp);
5193 			/*
5194 			 * This will start the kill timer (if we are the
5195 			 * last one) since we hold an increment yet. But
5196 			 * this is the only safe way to do this since
5197 			 * otherwise if the socket closes at the same time
5198 			 * we are here we might collide in the cleanup.
5199 			 */
5200 			sctp_inpcb_free(inp,
5201 			    SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5202 			    SCTP_CALLED_DIRECTLY_NOCMPSET);
5203 			SCTP_INP_DECR_REF(inp);
5204 		} else {
5205 			/* The socket is still open. */
5206 			SCTP_INP_DECR_REF(inp);
5207 			SCTP_INP_RUNLOCK(inp);
5208 		}
5209 	}
5210 	/* destroyed the asoc */
5211 #ifdef SCTP_LOG_CLOSING
5212 	sctp_log_closing(inp, NULL, 11);
5213 #endif
5214 	return (1);
5215 }
5216 
5217 /*
5218  * determine if a destination is "reachable" based upon the addresses bound
5219  * to the current endpoint (e.g. only v4 or v6 currently bound)
5220  */
5221 /*
5222  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5223  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5224  * types bound as its endpoint
5225  */
5226 int
5227 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5228 {
5229 	struct sctp_inpcb *inp;
5230 	int answer;
5231 
5232 	/*
5233 	 * No locks here, the TCB, in all cases is already locked and an
5234 	 * assoc is up. There is either a INP lock by the caller applied (in
5235 	 * asconf case when deleting an address) or NOT in the HB case,
5236 	 * however if HB then the INP increment is up and the INP will not
5237 	 * be removed (on top of the fact that we have a TCB lock). So we
5238 	 * only want to read the sctp_flags, which is either bound-all or
5239 	 * not.. no protection needed since once an assoc is up you can't be
5240 	 * changing your binding.
5241 	 */
5242 	inp = stcb->sctp_ep;
5243 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5244 		/* if bound all, destination is not restricted */
5245 		/*
5246 		 * RRS: Question during lock work: Is this correct? If you
5247 		 * are bound-all you still might need to obey the V4--V6
5248 		 * flags??? IMO this bound-all stuff needs to be removed!
5249 		 */
5250 		return (1);
5251 	}
5252 	/* NOTE: all "scope" checks are done when local addresses are added */
5253 	switch (destaddr->sa_family) {
5254 #ifdef INET6
5255 	case AF_INET6:
5256 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5257 		break;
5258 #endif
5259 #ifdef INET
5260 	case AF_INET:
5261 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5262 		break;
5263 #endif
5264 	default:
5265 		/* invalid family, so it's unreachable */
5266 		answer = 0;
5267 		break;
5268 	}
5269 	return (answer);
5270 }
5271 
5272 /*
5273  * update the inp_vflags on an endpoint
5274  */
5275 static void
5276 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5277 {
5278 	struct sctp_laddr *laddr;
5279 
5280 	/* first clear the flag */
5281 	inp->ip_inp.inp.inp_vflag = 0;
5282 	/* set the flag based on addresses on the ep list */
5283 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5284 		if (laddr->ifa == NULL) {
5285 			SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5286 			    __func__);
5287 			continue;
5288 		}
5289 
5290 		if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5291 			continue;
5292 		}
5293 		switch (laddr->ifa->address.sa.sa_family) {
5294 #ifdef INET6
5295 		case AF_INET6:
5296 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5297 			break;
5298 #endif
5299 #ifdef INET
5300 		case AF_INET:
5301 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5302 			break;
5303 #endif
5304 		default:
5305 			break;
5306 		}
5307 	}
5308 }
5309 
5310 /*
5311  * Add the address to the endpoint local address list There is nothing to be
5312  * done if we are bound to all addresses
5313  */
5314 void
5315 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5316 {
5317 	struct sctp_laddr *laddr;
5318 	struct sctp_tcb *stcb;
5319 	int fnd, error = 0;
5320 
5321 	fnd = 0;
5322 
5323 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5324 		/* You are already bound to all. You have it already */
5325 		return;
5326 	}
5327 #ifdef INET6
5328 	if (ifa->address.sa.sa_family == AF_INET6) {
5329 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5330 			/* Can't bind a non-useable addr. */
5331 			return;
5332 		}
5333 	}
5334 #endif
5335 	/* first, is it already present? */
5336 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5337 		if (laddr->ifa == ifa) {
5338 			fnd = 1;
5339 			break;
5340 		}
5341 	}
5342 
5343 	if (fnd == 0) {
5344 		/* Not in the ep list */
5345 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5346 		if (error != 0)
5347 			return;
5348 		inp->laddr_count++;
5349 		/* update inp_vflag flags */
5350 		switch (ifa->address.sa.sa_family) {
5351 #ifdef INET6
5352 		case AF_INET6:
5353 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5354 			break;
5355 #endif
5356 #ifdef INET
5357 		case AF_INET:
5358 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5359 			break;
5360 #endif
5361 		default:
5362 			break;
5363 		}
5364 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5365 			sctp_add_local_addr_restricted(stcb, ifa);
5366 		}
5367 	}
5368 	return;
5369 }
5370 
5371 /*
5372  * select a new (hopefully reachable) destination net (should only be used
5373  * when we deleted an ep addr that is the only usable source address to reach
5374  * the destination net)
5375  */
5376 static void
5377 sctp_select_primary_destination(struct sctp_tcb *stcb)
5378 {
5379 	struct sctp_nets *net;
5380 
5381 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5382 		/* for now, we'll just pick the first reachable one we find */
5383 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5384 			continue;
5385 		if (sctp_destination_is_reachable(stcb,
5386 		    (struct sockaddr *)&net->ro._l_addr)) {
5387 			/* found a reachable destination */
5388 			stcb->asoc.primary_destination = net;
5389 		}
5390 	}
5391 	/* I can't there from here! ...we're gonna die shortly... */
5392 }
5393 
5394 /*
5395  * Delete the address from the endpoint local address list. There is nothing
5396  * to be done if we are bound to all addresses
5397  */
5398 void
5399 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5400 {
5401 	struct sctp_laddr *laddr;
5402 	int fnd;
5403 
5404 	fnd = 0;
5405 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5406 		/* You are already bound to all. You have it already */
5407 		return;
5408 	}
5409 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5410 		if (laddr->ifa == ifa) {
5411 			fnd = 1;
5412 			break;
5413 		}
5414 	}
5415 	if (fnd && (inp->laddr_count < 2)) {
5416 		/* can't delete unless there are at LEAST 2 addresses */
5417 		return;
5418 	}
5419 	if (fnd) {
5420 		/*
5421 		 * clean up any use of this address go through our
5422 		 * associations and clear any last_used_address that match
5423 		 * this one for each assoc, see if a new primary_destination
5424 		 * is needed
5425 		 */
5426 		struct sctp_tcb *stcb;
5427 
5428 		/* clean up "next_addr_touse" */
5429 		if (inp->next_addr_touse == laddr)
5430 			/* delete this address */
5431 			inp->next_addr_touse = NULL;
5432 
5433 		/* clean up "last_used_address" */
5434 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5435 			struct sctp_nets *net;
5436 
5437 			SCTP_TCB_LOCK(stcb);
5438 			if (stcb->asoc.last_used_address == laddr)
5439 				/* delete this address */
5440 				stcb->asoc.last_used_address = NULL;
5441 			/*
5442 			 * Now spin through all the nets and purge any ref
5443 			 * to laddr
5444 			 */
5445 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5446 				if (net->ro._s_addr == laddr->ifa) {
5447 					/* Yep, purge src address selected */
5448 					RO_NHFREE(&net->ro);
5449 					sctp_free_ifa(net->ro._s_addr);
5450 					net->ro._s_addr = NULL;
5451 					net->src_addr_selected = 0;
5452 				}
5453 			}
5454 			SCTP_TCB_UNLOCK(stcb);
5455 		}		/* for each tcb */
5456 		/* remove it from the ep list */
5457 		sctp_remove_laddr(laddr);
5458 		inp->laddr_count--;
5459 		/* update inp_vflag flags */
5460 		sctp_update_ep_vflag(inp);
5461 	}
5462 	return;
5463 }
5464 
5465 /*
5466  * Add the address to the TCB local address restricted list.
5467  * This is a "pending" address list (eg. addresses waiting for an
5468  * ASCONF-ACK response) and cannot be used as a valid source address.
5469  */
5470 void
5471 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5472 {
5473 	struct sctp_laddr *laddr;
5474 	struct sctpladdr *list;
5475 
5476 	/*
5477 	 * Assumes TCB is locked.. and possibly the INP. May need to
5478 	 * confirm/fix that if we need it and is not the case.
5479 	 */
5480 	list = &stcb->asoc.sctp_restricted_addrs;
5481 
5482 #ifdef INET6
5483 	if (ifa->address.sa.sa_family == AF_INET6) {
5484 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5485 			/* Can't bind a non-existent addr. */
5486 			return;
5487 		}
5488 	}
5489 #endif
5490 	/* does the address already exist? */
5491 	LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5492 		if (laddr->ifa == ifa) {
5493 			return;
5494 		}
5495 	}
5496 
5497 	/* add to the list */
5498 	(void)sctp_insert_laddr(list, ifa, 0);
5499 	return;
5500 }
5501 
5502 /*
5503  * Remove a local address from the TCB local address restricted list
5504  */
5505 void
5506 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5507 {
5508 	struct sctp_inpcb *inp;
5509 	struct sctp_laddr *laddr;
5510 
5511 	/*
5512 	 * This is called by asconf work. It is assumed that a) The TCB is
5513 	 * locked and b) The INP is locked. This is true in as much as I can
5514 	 * trace through the entry asconf code where I did these locks.
5515 	 * Again, the ASCONF code is a bit different in that it does lock
5516 	 * the INP during its work often times. This must be since we don't
5517 	 * want other proc's looking up things while what they are looking
5518 	 * up is changing :-D
5519 	 */
5520 
5521 	inp = stcb->sctp_ep;
5522 	/* if subset bound and don't allow ASCONF's, can't delete last */
5523 	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5524 	    sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5525 		if (stcb->sctp_ep->laddr_count < 2) {
5526 			/* can't delete last address */
5527 			return;
5528 		}
5529 	}
5530 	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5531 		/* remove the address if it exists */
5532 		if (laddr->ifa == NULL)
5533 			continue;
5534 		if (laddr->ifa == ifa) {
5535 			sctp_remove_laddr(laddr);
5536 			return;
5537 		}
5538 	}
5539 
5540 	/* address not found! */
5541 	return;
5542 }
5543 
5544 /* sysctl */
5545 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5546 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5547 
5548 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5549 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5550 int *sctp_cpuarry = NULL;
5551 
5552 void
5553 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5554 {
5555 	/* Queue a packet to a processor for the specified core */
5556 	struct sctp_mcore_queue *qent;
5557 	struct sctp_mcore_ctrl *wkq;
5558 	int need_wake = 0;
5559 
5560 	if (sctp_mcore_workers == NULL) {
5561 		/* Something went way bad during setup */
5562 		sctp_input_with_port(m, off, 0);
5563 		return;
5564 	}
5565 	SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5566 	    (sizeof(struct sctp_mcore_queue)),
5567 	    SCTP_M_MCORE);
5568 	if (qent == NULL) {
5569 		/* This is trouble  */
5570 		sctp_input_with_port(m, off, 0);
5571 		return;
5572 	}
5573 	qent->vn = curvnet;
5574 	qent->m = m;
5575 	qent->off = off;
5576 	qent->v6 = 0;
5577 	wkq = &sctp_mcore_workers[cpu_to_use];
5578 	SCTP_MCORE_QLOCK(wkq);
5579 
5580 	TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5581 	if (wkq->running == 0) {
5582 		need_wake = 1;
5583 	}
5584 	SCTP_MCORE_QUNLOCK(wkq);
5585 	if (need_wake) {
5586 		wakeup(&wkq->running);
5587 	}
5588 }
5589 
5590 static void
5591 sctp_mcore_thread(void *arg)
5592 {
5593 
5594 	struct sctp_mcore_ctrl *wkq;
5595 	struct sctp_mcore_queue *qent;
5596 
5597 	wkq = (struct sctp_mcore_ctrl *)arg;
5598 	struct mbuf *m;
5599 	int off, v6;
5600 
5601 	/* Wait for first tickle */
5602 	SCTP_MCORE_LOCK(wkq);
5603 	wkq->running = 0;
5604 	msleep(&wkq->running,
5605 	    &wkq->core_mtx,
5606 	    0, "wait for pkt", 0);
5607 	SCTP_MCORE_UNLOCK(wkq);
5608 
5609 	/* Bind to our cpu */
5610 	thread_lock(curthread);
5611 	sched_bind(curthread, wkq->cpuid);
5612 	thread_unlock(curthread);
5613 
5614 	/* Now lets start working */
5615 	SCTP_MCORE_LOCK(wkq);
5616 	/* Now grab lock and go */
5617 	for (;;) {
5618 		SCTP_MCORE_QLOCK(wkq);
5619 skip_sleep:
5620 		wkq->running = 1;
5621 		qent = TAILQ_FIRST(&wkq->que);
5622 		if (qent) {
5623 			TAILQ_REMOVE(&wkq->que, qent, next);
5624 			SCTP_MCORE_QUNLOCK(wkq);
5625 			CURVNET_SET(qent->vn);
5626 			m = qent->m;
5627 			off = qent->off;
5628 			v6 = qent->v6;
5629 			SCTP_FREE(qent, SCTP_M_MCORE);
5630 			if (v6 == 0) {
5631 				sctp_input_with_port(m, off, 0);
5632 			} else {
5633 				SCTP_PRINTF("V6 not yet supported\n");
5634 				sctp_m_freem(m);
5635 			}
5636 			CURVNET_RESTORE();
5637 			SCTP_MCORE_QLOCK(wkq);
5638 		}
5639 		wkq->running = 0;
5640 		if (!TAILQ_EMPTY(&wkq->que)) {
5641 			goto skip_sleep;
5642 		}
5643 		SCTP_MCORE_QUNLOCK(wkq);
5644 		msleep(&wkq->running,
5645 		    &wkq->core_mtx,
5646 		    0, "wait for pkt", 0);
5647 	}
5648 }
5649 
5650 static void
5651 sctp_startup_mcore_threads(void)
5652 {
5653 	int i, cpu;
5654 
5655 	if (mp_ncpus == 1)
5656 		return;
5657 
5658 	if (sctp_mcore_workers != NULL) {
5659 		/*
5660 		 * Already been here in some previous vnet?
5661 		 */
5662 		return;
5663 	}
5664 	SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5665 	    ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5666 	    SCTP_M_MCORE);
5667 	if (sctp_mcore_workers == NULL) {
5668 		/* TSNH I hope */
5669 		return;
5670 	}
5671 	memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5672 	    sizeof(struct sctp_mcore_ctrl)));
5673 	/* Init the structures */
5674 	for (i = 0; i <= mp_maxid; i++) {
5675 		TAILQ_INIT(&sctp_mcore_workers[i].que);
5676 		SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5677 		SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5678 		sctp_mcore_workers[i].cpuid = i;
5679 	}
5680 	if (sctp_cpuarry == NULL) {
5681 		SCTP_MALLOC(sctp_cpuarry, int *,
5682 		    (mp_ncpus * sizeof(int)),
5683 		    SCTP_M_MCORE);
5684 		i = 0;
5685 		CPU_FOREACH(cpu) {
5686 			sctp_cpuarry[i] = cpu;
5687 			i++;
5688 		}
5689 	}
5690 	/* Now start them all */
5691 	CPU_FOREACH(cpu) {
5692 		(void)kproc_create(sctp_mcore_thread,
5693 		    (void *)&sctp_mcore_workers[cpu],
5694 		    &sctp_mcore_workers[cpu].thread_proc,
5695 		    0,
5696 		    SCTP_KTHREAD_PAGES,
5697 		    SCTP_MCORE_NAME);
5698 	}
5699 }
5700 #endif
5701 
5702 void
5703 sctp_pcb_init(void)
5704 {
5705 	/*
5706 	 * SCTP initialization for the PCB structures should be called by
5707 	 * the sctp_init() function.
5708 	 */
5709 	int i;
5710 	struct timeval tv;
5711 
5712 	if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5713 		/* error I was called twice */
5714 		return;
5715 	}
5716 	SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5717 
5718 #if defined(SCTP_LOCAL_TRACE_BUF)
5719 	memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5720 #endif
5721 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5722 	SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5723 	    ((mp_maxid + 1) * sizeof(struct sctpstat)),
5724 	    SCTP_M_MCORE);
5725 #endif
5726 	(void)SCTP_GETTIME_TIMEVAL(&tv);
5727 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5728 	memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5729 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5730 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5731 #else
5732 	memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5733 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5734 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5735 #endif
5736 	/* init the empty list of (All) Endpoints */
5737 	LIST_INIT(&SCTP_BASE_INFO(listhead));
5738 
5739 	/* init the hash table of endpoints */
5740 	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5741 	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5742 	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5743 	SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5744 	    &SCTP_BASE_INFO(hashasocmark));
5745 	SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5746 	    &SCTP_BASE_INFO(hashmark));
5747 	SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5748 	    &SCTP_BASE_INFO(hashtcpmark));
5749 	SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5750 	SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5751 	    &SCTP_BASE_INFO(hashvrfmark));
5752 
5753 	SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5754 	    &SCTP_BASE_INFO(vrf_ifn_hashmark));
5755 	/* init the zones */
5756 	/*
5757 	 * FIX ME: Should check for NULL returns, but if it does fail we are
5758 	 * doomed to panic anyways... add later maybe.
5759 	 */
5760 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5761 	    sizeof(struct sctp_inpcb), maxsockets);
5762 
5763 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5764 	    sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5765 
5766 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5767 	    sizeof(struct sctp_laddr),
5768 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5769 
5770 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5771 	    sizeof(struct sctp_nets),
5772 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5773 
5774 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5775 	    sizeof(struct sctp_tmit_chunk),
5776 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5777 
5778 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5779 	    sizeof(struct sctp_queued_to_read),
5780 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5781 
5782 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5783 	    sizeof(struct sctp_stream_queue_pending),
5784 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5785 
5786 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5787 	    sizeof(struct sctp_asconf),
5788 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5789 
5790 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5791 	    sizeof(struct sctp_asconf_ack),
5792 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5793 
5794 	/* Master Lock INIT for info structure */
5795 	SCTP_INP_INFO_LOCK_INIT();
5796 	SCTP_STATLOG_INIT_LOCK();
5797 
5798 	SCTP_IPI_COUNT_INIT();
5799 	SCTP_IPI_ADDR_INIT();
5800 #ifdef SCTP_PACKET_LOGGING
5801 	SCTP_IP_PKTLOG_INIT();
5802 #endif
5803 	LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5804 
5805 	SCTP_WQ_ADDR_INIT();
5806 	/* not sure if we need all the counts */
5807 	SCTP_BASE_INFO(ipi_count_ep) = 0;
5808 	/* assoc/tcb zone info */
5809 	SCTP_BASE_INFO(ipi_count_asoc) = 0;
5810 	/* local addrlist zone info */
5811 	SCTP_BASE_INFO(ipi_count_laddr) = 0;
5812 	/* remote addrlist zone info */
5813 	SCTP_BASE_INFO(ipi_count_raddr) = 0;
5814 	/* chunk info */
5815 	SCTP_BASE_INFO(ipi_count_chunk) = 0;
5816 
5817 	/* socket queue zone info */
5818 	SCTP_BASE_INFO(ipi_count_readq) = 0;
5819 
5820 	/* stream out queue cont */
5821 	SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5822 
5823 	SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5824 	SCTP_BASE_INFO(ipi_free_chunks) = 0;
5825 
5826 	SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5827 
5828 	/* Init the TIMEWAIT list */
5829 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5830 		LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5831 	}
5832 	sctp_startup_iterator();
5833 
5834 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5835 	sctp_startup_mcore_threads();
5836 #endif
5837 
5838 	/*
5839 	 * INIT the default VRF which for BSD is the only one, other O/S's
5840 	 * may have more. But initially they must start with one and then
5841 	 * add the VRF's as addresses are added.
5842 	 */
5843 	sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5844 }
5845 
5846 /*
5847  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5848  */
5849 void
5850 sctp_pcb_finish(void)
5851 {
5852 	struct sctp_vrflist *vrf_bucket;
5853 	struct sctp_vrf *vrf, *nvrf;
5854 	struct sctp_ifn *ifn, *nifn;
5855 	struct sctp_ifa *ifa, *nifa;
5856 	struct sctpvtaghead *chain;
5857 	struct sctp_tagblock *twait_block, *prev_twait_block;
5858 	struct sctp_laddr *wi, *nwi;
5859 	int i;
5860 	struct sctp_iterator *it, *nit;
5861 
5862 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5863 		SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5864 		return;
5865 	}
5866 	SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5867 	/*
5868 	 * In FreeBSD the iterator thread never exits but we do clean up.
5869 	 * The only way FreeBSD reaches here is if we have VRF's but we
5870 	 * still add the ifdef to make it compile on old versions.
5871 	 */
5872 retry:
5873 	SCTP_IPI_ITERATOR_WQ_LOCK();
5874 	/*
5875 	 * sctp_iterator_worker() might be working on an it entry without
5876 	 * holding the lock.  We won't find it on the list either and
5877 	 * continue and free/destroy it.  While holding the lock, spin, to
5878 	 * avoid the race condition as sctp_iterator_worker() will have to
5879 	 * wait to re-acquire the lock.
5880 	 */
5881 	if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5882 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
5883 		SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5884 		    "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5885 		DELAY(10);
5886 		goto retry;
5887 	}
5888 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5889 		if (it->vn != curvnet) {
5890 			continue;
5891 		}
5892 		TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5893 		if (it->function_atend != NULL) {
5894 			(*it->function_atend) (it->pointer, it->val);
5895 		}
5896 		SCTP_FREE(it, SCTP_M_ITER);
5897 	}
5898 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
5899 	SCTP_ITERATOR_LOCK();
5900 	if ((sctp_it_ctl.cur_it) &&
5901 	    (sctp_it_ctl.cur_it->vn == curvnet)) {
5902 		sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5903 	}
5904 	SCTP_ITERATOR_UNLOCK();
5905 	SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5906 	SCTP_WQ_ADDR_LOCK();
5907 	LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5908 		LIST_REMOVE(wi, sctp_nxt_addr);
5909 		SCTP_DECR_LADDR_COUNT();
5910 		if (wi->action == SCTP_DEL_IP_ADDRESS) {
5911 			SCTP_FREE(wi->ifa, SCTP_M_IFA);
5912 		}
5913 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5914 	}
5915 	SCTP_WQ_ADDR_UNLOCK();
5916 
5917 	/*
5918 	 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5919 	 * destroyed first).
5920 	 */
5921 	SCTP_IPI_ADDR_WLOCK();
5922 	vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5923 	LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5924 		LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5925 			LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5926 				/* free the ifa */
5927 				LIST_REMOVE(ifa, next_bucket);
5928 				LIST_REMOVE(ifa, next_ifa);
5929 				SCTP_FREE(ifa, SCTP_M_IFA);
5930 			}
5931 			/* free the ifn */
5932 			LIST_REMOVE(ifn, next_bucket);
5933 			LIST_REMOVE(ifn, next_ifn);
5934 			SCTP_FREE(ifn, SCTP_M_IFN);
5935 		}
5936 		SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5937 		/* free the vrf */
5938 		LIST_REMOVE(vrf, next_vrf);
5939 		SCTP_FREE(vrf, SCTP_M_VRF);
5940 	}
5941 	SCTP_IPI_ADDR_WUNLOCK();
5942 	/* free the vrf hashes */
5943 	SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5944 	SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5945 
5946 	/*
5947 	 * free the TIMEWAIT list elements malloc'd in the function
5948 	 * sctp_add_vtag_to_timewait()...
5949 	 */
5950 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5951 		chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5952 		if (!LIST_EMPTY(chain)) {
5953 			prev_twait_block = NULL;
5954 			LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5955 				if (prev_twait_block) {
5956 					SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5957 				}
5958 				prev_twait_block = twait_block;
5959 			}
5960 			SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5961 		}
5962 	}
5963 
5964 	/* free the locks and mutexes */
5965 #ifdef SCTP_PACKET_LOGGING
5966 	SCTP_IP_PKTLOG_DESTROY();
5967 #endif
5968 	SCTP_IPI_ADDR_DESTROY();
5969 	SCTP_STATLOG_DESTROY();
5970 	SCTP_INP_INFO_LOCK_DESTROY();
5971 
5972 	SCTP_WQ_ADDR_DESTROY();
5973 
5974 	/* Get rid of other stuff too. */
5975 	if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5976 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5977 	if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5978 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5979 	if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5980 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5981 
5982 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5983 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5984 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5985 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5986 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5987 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5988 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5989 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5990 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5991 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5992 	SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5993 #endif
5994 }
5995 
5996 int
5997 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5998     int offset, int limit,
5999     struct sockaddr *src, struct sockaddr *dst,
6000     struct sockaddr *altsa, uint16_t port)
6001 {
6002 	/*
6003 	 * grub through the INIT pulling addresses and loading them to the
6004 	 * nets structure in the asoc. The from address in the mbuf should
6005 	 * also be loaded (if it is not already). This routine can be called
6006 	 * with either INIT or INIT-ACK's as long as the m points to the IP
6007 	 * packet and the offset points to the beginning of the parameters.
6008 	 */
6009 	struct sctp_inpcb *inp;
6010 	struct sctp_nets *net, *nnet, *net_tmp;
6011 	struct sctp_paramhdr *phdr, param_buf;
6012 	struct sctp_tcb *stcb_tmp;
6013 	uint16_t ptype, plen;
6014 	struct sockaddr *sa;
6015 	uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6016 	struct sctp_auth_random *p_random = NULL;
6017 	uint16_t random_len = 0;
6018 	uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6019 	struct sctp_auth_hmac_algo *hmacs = NULL;
6020 	uint16_t hmacs_len = 0;
6021 	uint8_t saw_asconf = 0;
6022 	uint8_t saw_asconf_ack = 0;
6023 	uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6024 	struct sctp_auth_chunk_list *chunks = NULL;
6025 	uint16_t num_chunks = 0;
6026 	sctp_key_t *new_key;
6027 	uint32_t keylen;
6028 	int got_random = 0, got_hmacs = 0, got_chklist = 0;
6029 	uint8_t peer_supports_ecn;
6030 	uint8_t peer_supports_prsctp;
6031 	uint8_t peer_supports_auth;
6032 	uint8_t peer_supports_asconf;
6033 	uint8_t peer_supports_asconf_ack;
6034 	uint8_t peer_supports_reconfig;
6035 	uint8_t peer_supports_nrsack;
6036 	uint8_t peer_supports_pktdrop;
6037 	uint8_t peer_supports_idata;
6038 #ifdef INET
6039 	struct sockaddr_in sin;
6040 #endif
6041 #ifdef INET6
6042 	struct sockaddr_in6 sin6;
6043 #endif
6044 
6045 	/* First get the destination address setup too. */
6046 #ifdef INET
6047 	memset(&sin, 0, sizeof(sin));
6048 	sin.sin_family = AF_INET;
6049 	sin.sin_len = sizeof(sin);
6050 	sin.sin_port = stcb->rport;
6051 #endif
6052 #ifdef INET6
6053 	memset(&sin6, 0, sizeof(sin6));
6054 	sin6.sin6_family = AF_INET6;
6055 	sin6.sin6_len = sizeof(struct sockaddr_in6);
6056 	sin6.sin6_port = stcb->rport;
6057 #endif
6058 	if (altsa) {
6059 		sa = altsa;
6060 	} else {
6061 		sa = src;
6062 	}
6063 	peer_supports_idata = 0;
6064 	peer_supports_ecn = 0;
6065 	peer_supports_prsctp = 0;
6066 	peer_supports_auth = 0;
6067 	peer_supports_asconf = 0;
6068 	peer_supports_asconf_ack = 0;
6069 	peer_supports_reconfig = 0;
6070 	peer_supports_nrsack = 0;
6071 	peer_supports_pktdrop = 0;
6072 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6073 		/* mark all addresses that we have currently on the list */
6074 		net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6075 	}
6076 	/* does the source address already exist? if so skip it */
6077 	inp = stcb->sctp_ep;
6078 	atomic_add_int(&stcb->asoc.refcnt, 1);
6079 	stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6080 	atomic_subtract_int(&stcb->asoc.refcnt, 1);
6081 
6082 	if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6083 		/* we must add the source address */
6084 		/* no scope set here since we have a tcb already. */
6085 		switch (sa->sa_family) {
6086 #ifdef INET
6087 		case AF_INET:
6088 			if (stcb->asoc.scope.ipv4_addr_legal) {
6089 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6090 					return (-1);
6091 				}
6092 			}
6093 			break;
6094 #endif
6095 #ifdef INET6
6096 		case AF_INET6:
6097 			if (stcb->asoc.scope.ipv6_addr_legal) {
6098 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6099 					return (-2);
6100 				}
6101 			}
6102 			break;
6103 #endif
6104 		default:
6105 			break;
6106 		}
6107 	} else {
6108 		if (net_tmp != NULL && stcb_tmp == stcb) {
6109 			net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6110 		} else if (stcb_tmp != stcb) {
6111 			/* It belongs to another association? */
6112 			if (stcb_tmp)
6113 				SCTP_TCB_UNLOCK(stcb_tmp);
6114 			return (-3);
6115 		}
6116 	}
6117 	if (stcb->asoc.state == 0) {
6118 		/* the assoc was freed? */
6119 		return (-4);
6120 	}
6121 	/* now we must go through each of the params. */
6122 	phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6123 	while (phdr) {
6124 		ptype = ntohs(phdr->param_type);
6125 		plen = ntohs(phdr->param_length);
6126 		/*
6127 		 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6128 		 * (uint32_t)ptype, (int)plen);
6129 		 */
6130 		if (offset + plen > limit) {
6131 			break;
6132 		}
6133 		if (plen < sizeof(struct sctp_paramhdr)) {
6134 			break;
6135 		}
6136 #ifdef INET
6137 		if (ptype == SCTP_IPV4_ADDRESS) {
6138 			if (stcb->asoc.scope.ipv4_addr_legal) {
6139 				struct sctp_ipv4addr_param *p4, p4_buf;
6140 
6141 				/* ok get the v4 address and check/add */
6142 				phdr = sctp_get_next_param(m, offset,
6143 				    (struct sctp_paramhdr *)&p4_buf,
6144 				    sizeof(p4_buf));
6145 				if (plen != sizeof(struct sctp_ipv4addr_param) ||
6146 				    phdr == NULL) {
6147 					return (-5);
6148 				}
6149 				p4 = (struct sctp_ipv4addr_param *)phdr;
6150 				sin.sin_addr.s_addr = p4->addr;
6151 				if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6152 					/* Skip multi-cast addresses */
6153 					goto next_param;
6154 				}
6155 				if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6156 				    (sin.sin_addr.s_addr == INADDR_ANY)) {
6157 					goto next_param;
6158 				}
6159 				sa = (struct sockaddr *)&sin;
6160 				inp = stcb->sctp_ep;
6161 				atomic_add_int(&stcb->asoc.refcnt, 1);
6162 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6163 				    dst, stcb);
6164 				atomic_subtract_int(&stcb->asoc.refcnt, 1);
6165 
6166 				if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6167 				    inp == NULL) {
6168 					/* we must add the source address */
6169 					/*
6170 					 * no scope set since we have a tcb
6171 					 * already
6172 					 */
6173 
6174 					/*
6175 					 * we must validate the state again
6176 					 * here
6177 					 */
6178 			add_it_now:
6179 					if (stcb->asoc.state == 0) {
6180 						/* the assoc was freed? */
6181 						return (-7);
6182 					}
6183 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6184 						return (-8);
6185 					}
6186 				} else if (stcb_tmp == stcb) {
6187 					if (stcb->asoc.state == 0) {
6188 						/* the assoc was freed? */
6189 						return (-10);
6190 					}
6191 					if (net != NULL) {
6192 						/* clear flag */
6193 						net->dest_state &=
6194 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6195 					}
6196 				} else {
6197 					/*
6198 					 * strange, address is in another
6199 					 * assoc? straighten out locks.
6200 					 */
6201 					if (stcb_tmp) {
6202 						if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6203 							struct mbuf *op_err;
6204 							char msg[SCTP_DIAG_INFO_LEN];
6205 
6206 							/*
6207 							 * in setup state we
6208 							 * abort this guy
6209 							 */
6210 							SCTP_SNPRINTF(msg, sizeof(msg),
6211 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6212 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6213 							    msg);
6214 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6215 							    stcb_tmp, op_err, false,
6216 							    SCTP_SO_NOT_LOCKED);
6217 							goto add_it_now;
6218 						}
6219 						SCTP_TCB_UNLOCK(stcb_tmp);
6220 					}
6221 
6222 					if (stcb->asoc.state == 0) {
6223 						/* the assoc was freed? */
6224 						return (-12);
6225 					}
6226 					return (-13);
6227 				}
6228 			}
6229 		} else
6230 #endif
6231 #ifdef INET6
6232 		if (ptype == SCTP_IPV6_ADDRESS) {
6233 			if (stcb->asoc.scope.ipv6_addr_legal) {
6234 				/* ok get the v6 address and check/add */
6235 				struct sctp_ipv6addr_param *p6, p6_buf;
6236 
6237 				phdr = sctp_get_next_param(m, offset,
6238 				    (struct sctp_paramhdr *)&p6_buf,
6239 				    sizeof(p6_buf));
6240 				if (plen != sizeof(struct sctp_ipv6addr_param) ||
6241 				    phdr == NULL) {
6242 					return (-14);
6243 				}
6244 				p6 = (struct sctp_ipv6addr_param *)phdr;
6245 				memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6246 				    sizeof(p6->addr));
6247 				if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6248 					/* Skip multi-cast addresses */
6249 					goto next_param;
6250 				}
6251 				if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6252 					/*
6253 					 * Link local make no sense without
6254 					 * scope
6255 					 */
6256 					goto next_param;
6257 				}
6258 				sa = (struct sockaddr *)&sin6;
6259 				inp = stcb->sctp_ep;
6260 				atomic_add_int(&stcb->asoc.refcnt, 1);
6261 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6262 				    dst, stcb);
6263 				atomic_subtract_int(&stcb->asoc.refcnt, 1);
6264 				if (stcb_tmp == NULL &&
6265 				    (inp == stcb->sctp_ep || inp == NULL)) {
6266 					/*
6267 					 * we must validate the state again
6268 					 * here
6269 					 */
6270 			add_it_now6:
6271 					if (stcb->asoc.state == 0) {
6272 						/* the assoc was freed? */
6273 						return (-16);
6274 					}
6275 					/*
6276 					 * we must add the address, no scope
6277 					 * set
6278 					 */
6279 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6280 						return (-17);
6281 					}
6282 				} else if (stcb_tmp == stcb) {
6283 					/*
6284 					 * we must validate the state again
6285 					 * here
6286 					 */
6287 					if (stcb->asoc.state == 0) {
6288 						/* the assoc was freed? */
6289 						return (-19);
6290 					}
6291 					if (net != NULL) {
6292 						/* clear flag */
6293 						net->dest_state &=
6294 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6295 					}
6296 				} else {
6297 					/*
6298 					 * strange, address is in another
6299 					 * assoc? straighten out locks.
6300 					 */
6301 					if (stcb_tmp) {
6302 						if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6303 							struct mbuf *op_err;
6304 							char msg[SCTP_DIAG_INFO_LEN];
6305 
6306 							/*
6307 							 * in setup state we
6308 							 * abort this guy
6309 							 */
6310 							SCTP_SNPRINTF(msg, sizeof(msg),
6311 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6312 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6313 							    msg);
6314 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6315 							    stcb_tmp, op_err, false,
6316 							    SCTP_SO_NOT_LOCKED);
6317 							goto add_it_now6;
6318 						}
6319 						SCTP_TCB_UNLOCK(stcb_tmp);
6320 					}
6321 					if (stcb->asoc.state == 0) {
6322 						/* the assoc was freed? */
6323 						return (-21);
6324 					}
6325 					return (-22);
6326 				}
6327 			}
6328 		} else
6329 #endif
6330 		if (ptype == SCTP_ECN_CAPABLE) {
6331 			peer_supports_ecn = 1;
6332 		} else if (ptype == SCTP_ULP_ADAPTATION) {
6333 			if (stcb->asoc.state != SCTP_STATE_OPEN) {
6334 				struct sctp_adaptation_layer_indication ai,
6335 				                                *aip;
6336 
6337 				phdr = sctp_get_next_param(m, offset,
6338 				    (struct sctp_paramhdr *)&ai, sizeof(ai));
6339 				aip = (struct sctp_adaptation_layer_indication *)phdr;
6340 				if (aip) {
6341 					stcb->asoc.peers_adaptation = ntohl(aip->indication);
6342 					stcb->asoc.adaptation_needed = 1;
6343 				}
6344 			}
6345 		} else if (ptype == SCTP_SET_PRIM_ADDR) {
6346 			struct sctp_asconf_addr_param lstore, *fee;
6347 			int lptype;
6348 			struct sockaddr *lsa = NULL;
6349 #ifdef INET
6350 			struct sctp_asconf_addrv4_param *fii;
6351 #endif
6352 
6353 			if (stcb->asoc.asconf_supported == 0) {
6354 				return (-100);
6355 			}
6356 			if (plen > sizeof(lstore)) {
6357 				return (-23);
6358 			}
6359 			if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6360 				return (-101);
6361 			}
6362 			phdr = sctp_get_next_param(m, offset,
6363 			    (struct sctp_paramhdr *)&lstore,
6364 			    plen);
6365 			if (phdr == NULL) {
6366 				return (-24);
6367 			}
6368 			fee = (struct sctp_asconf_addr_param *)phdr;
6369 			lptype = ntohs(fee->addrp.ph.param_type);
6370 			switch (lptype) {
6371 #ifdef INET
6372 			case SCTP_IPV4_ADDRESS:
6373 				if (plen !=
6374 				    sizeof(struct sctp_asconf_addrv4_param)) {
6375 					SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6376 					    (int)sizeof(struct sctp_asconf_addrv4_param),
6377 					    plen);
6378 				} else {
6379 					fii = (struct sctp_asconf_addrv4_param *)fee;
6380 					sin.sin_addr.s_addr = fii->addrp.addr;
6381 					lsa = (struct sockaddr *)&sin;
6382 				}
6383 				break;
6384 #endif
6385 #ifdef INET6
6386 			case SCTP_IPV6_ADDRESS:
6387 				if (plen !=
6388 				    sizeof(struct sctp_asconf_addr_param)) {
6389 					SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6390 					    (int)sizeof(struct sctp_asconf_addr_param),
6391 					    plen);
6392 				} else {
6393 					memcpy(sin6.sin6_addr.s6_addr,
6394 					    fee->addrp.addr,
6395 					    sizeof(fee->addrp.addr));
6396 					lsa = (struct sockaddr *)&sin6;
6397 				}
6398 				break;
6399 #endif
6400 			default:
6401 				break;
6402 			}
6403 			if (lsa) {
6404 				(void)sctp_set_primary_addr(stcb, sa, NULL);
6405 			}
6406 		} else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6407 			stcb->asoc.peer_supports_nat = 1;
6408 		} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6409 			/* Peer supports pr-sctp */
6410 			peer_supports_prsctp = 1;
6411 		} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6412 			/* A supported extension chunk */
6413 			struct sctp_supported_chunk_types_param *pr_supported;
6414 			uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6415 			int num_ent, i;
6416 
6417 			if (plen > sizeof(local_store)) {
6418 				return (-35);
6419 			}
6420 			phdr = sctp_get_next_param(m, offset,
6421 			    (struct sctp_paramhdr *)&local_store, plen);
6422 			if (phdr == NULL) {
6423 				return (-25);
6424 			}
6425 			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6426 			num_ent = plen - sizeof(struct sctp_paramhdr);
6427 			for (i = 0; i < num_ent; i++) {
6428 				switch (pr_supported->chunk_types[i]) {
6429 				case SCTP_ASCONF:
6430 					peer_supports_asconf = 1;
6431 					break;
6432 				case SCTP_ASCONF_ACK:
6433 					peer_supports_asconf_ack = 1;
6434 					break;
6435 				case SCTP_FORWARD_CUM_TSN:
6436 					peer_supports_prsctp = 1;
6437 					break;
6438 				case SCTP_PACKET_DROPPED:
6439 					peer_supports_pktdrop = 1;
6440 					break;
6441 				case SCTP_NR_SELECTIVE_ACK:
6442 					peer_supports_nrsack = 1;
6443 					break;
6444 				case SCTP_STREAM_RESET:
6445 					peer_supports_reconfig = 1;
6446 					break;
6447 				case SCTP_AUTHENTICATION:
6448 					peer_supports_auth = 1;
6449 					break;
6450 				case SCTP_IDATA:
6451 					peer_supports_idata = 1;
6452 					break;
6453 				default:
6454 					/* one I have not learned yet */
6455 					break;
6456 				}
6457 			}
6458 		} else if (ptype == SCTP_RANDOM) {
6459 			if (plen > sizeof(random_store))
6460 				break;
6461 			if (got_random) {
6462 				/* already processed a RANDOM */
6463 				goto next_param;
6464 			}
6465 			phdr = sctp_get_next_param(m, offset,
6466 			    (struct sctp_paramhdr *)random_store,
6467 			    plen);
6468 			if (phdr == NULL)
6469 				return (-26);
6470 			p_random = (struct sctp_auth_random *)phdr;
6471 			random_len = plen - sizeof(*p_random);
6472 			/* enforce the random length */
6473 			if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6474 				SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6475 				return (-27);
6476 			}
6477 			got_random = 1;
6478 		} else if (ptype == SCTP_HMAC_LIST) {
6479 			uint16_t num_hmacs;
6480 			uint16_t i;
6481 
6482 			if (plen > sizeof(hmacs_store))
6483 				break;
6484 			if (got_hmacs) {
6485 				/* already processed a HMAC list */
6486 				goto next_param;
6487 			}
6488 			phdr = sctp_get_next_param(m, offset,
6489 			    (struct sctp_paramhdr *)hmacs_store,
6490 			    plen);
6491 			if (phdr == NULL)
6492 				return (-28);
6493 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
6494 			hmacs_len = plen - sizeof(*hmacs);
6495 			num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6496 			/* validate the hmac list */
6497 			if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6498 				return (-29);
6499 			}
6500 			if (stcb->asoc.peer_hmacs != NULL)
6501 				sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6502 			stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6503 			if (stcb->asoc.peer_hmacs != NULL) {
6504 				for (i = 0; i < num_hmacs; i++) {
6505 					(void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6506 					    ntohs(hmacs->hmac_ids[i]));
6507 				}
6508 			}
6509 			got_hmacs = 1;
6510 		} else if (ptype == SCTP_CHUNK_LIST) {
6511 			int i;
6512 
6513 			if (plen > sizeof(chunks_store))
6514 				break;
6515 			if (got_chklist) {
6516 				/* already processed a Chunks list */
6517 				goto next_param;
6518 			}
6519 			phdr = sctp_get_next_param(m, offset,
6520 			    (struct sctp_paramhdr *)chunks_store,
6521 			    plen);
6522 			if (phdr == NULL)
6523 				return (-30);
6524 			chunks = (struct sctp_auth_chunk_list *)phdr;
6525 			num_chunks = plen - sizeof(*chunks);
6526 			if (stcb->asoc.peer_auth_chunks != NULL)
6527 				sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6528 			else
6529 				stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6530 			for (i = 0; i < num_chunks; i++) {
6531 				(void)sctp_auth_add_chunk(chunks->chunk_types[i],
6532 				    stcb->asoc.peer_auth_chunks);
6533 				/* record asconf/asconf-ack if listed */
6534 				if (chunks->chunk_types[i] == SCTP_ASCONF)
6535 					saw_asconf = 1;
6536 				if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6537 					saw_asconf_ack = 1;
6538 			}
6539 			got_chklist = 1;
6540 		} else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6541 			    (ptype == SCTP_STATE_COOKIE) ||
6542 			    (ptype == SCTP_UNRECOG_PARAM) ||
6543 			    (ptype == SCTP_COOKIE_PRESERVE) ||
6544 			    (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6545 			    (ptype == SCTP_ADD_IP_ADDRESS) ||
6546 			    (ptype == SCTP_DEL_IP_ADDRESS) ||
6547 			    (ptype == SCTP_ERROR_CAUSE_IND) ||
6548 		    (ptype == SCTP_SUCCESS_REPORT)) {
6549 			/* don't care */
6550 		} else {
6551 			if ((ptype & 0x8000) == 0x0000) {
6552 				/*
6553 				 * must stop processing the rest of the
6554 				 * param's. Any report bits were handled
6555 				 * with the call to
6556 				 * sctp_arethere_unrecognized_parameters()
6557 				 * when the INIT or INIT-ACK was first seen.
6558 				 */
6559 				break;
6560 			}
6561 		}
6562 
6563 next_param:
6564 		offset += SCTP_SIZE32(plen);
6565 		if (offset >= limit) {
6566 			break;
6567 		}
6568 		phdr = sctp_get_next_param(m, offset, &param_buf,
6569 		    sizeof(param_buf));
6570 	}
6571 	/* Now check to see if we need to purge any addresses */
6572 	TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6573 		if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6574 		    SCTP_ADDR_NOT_IN_ASSOC) {
6575 			/* This address has been removed from the asoc */
6576 			/* remove and free it */
6577 			stcb->asoc.numnets--;
6578 			TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6579 			if (net == stcb->asoc.alternate) {
6580 				sctp_free_remote_addr(stcb->asoc.alternate);
6581 				stcb->asoc.alternate = NULL;
6582 			}
6583 			if (net == stcb->asoc.primary_destination) {
6584 				stcb->asoc.primary_destination = NULL;
6585 				sctp_select_primary_destination(stcb);
6586 			}
6587 			sctp_free_remote_addr(net);
6588 		}
6589 	}
6590 	if ((stcb->asoc.ecn_supported == 1) &&
6591 	    (peer_supports_ecn == 0)) {
6592 		stcb->asoc.ecn_supported = 0;
6593 	}
6594 	if ((stcb->asoc.prsctp_supported == 1) &&
6595 	    (peer_supports_prsctp == 0)) {
6596 		stcb->asoc.prsctp_supported = 0;
6597 	}
6598 	if ((stcb->asoc.auth_supported == 1) &&
6599 	    ((peer_supports_auth == 0) ||
6600 	    (got_random == 0) || (got_hmacs == 0))) {
6601 		stcb->asoc.auth_supported = 0;
6602 	}
6603 	if ((stcb->asoc.asconf_supported == 1) &&
6604 	    ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6605 	    (stcb->asoc.auth_supported == 0) ||
6606 	    (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6607 		stcb->asoc.asconf_supported = 0;
6608 	}
6609 	if ((stcb->asoc.reconfig_supported == 1) &&
6610 	    (peer_supports_reconfig == 0)) {
6611 		stcb->asoc.reconfig_supported = 0;
6612 	}
6613 	if ((stcb->asoc.idata_supported == 1) &&
6614 	    (peer_supports_idata == 0)) {
6615 		stcb->asoc.idata_supported = 0;
6616 	}
6617 	if ((stcb->asoc.nrsack_supported == 1) &&
6618 	    (peer_supports_nrsack == 0)) {
6619 		stcb->asoc.nrsack_supported = 0;
6620 	}
6621 	if ((stcb->asoc.pktdrop_supported == 1) &&
6622 	    (peer_supports_pktdrop == 0)) {
6623 		stcb->asoc.pktdrop_supported = 0;
6624 	}
6625 	/* validate authentication required parameters */
6626 	if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6627 		/* peer does not support auth but sent a chunks list? */
6628 		return (-31);
6629 	}
6630 	if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6631 		/* peer supports asconf but not auth? */
6632 		return (-32);
6633 	} else if ((peer_supports_asconf == 1) &&
6634 		    (peer_supports_auth == 1) &&
6635 	    ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6636 		return (-33);
6637 	}
6638 	/* concatenate the full random key */
6639 	keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6640 	if (chunks != NULL) {
6641 		keylen += sizeof(*chunks) + num_chunks;
6642 	}
6643 	new_key = sctp_alloc_key(keylen);
6644 	if (new_key != NULL) {
6645 		/* copy in the RANDOM */
6646 		if (p_random != NULL) {
6647 			keylen = sizeof(*p_random) + random_len;
6648 			memcpy(new_key->key, p_random, keylen);
6649 		} else {
6650 			keylen = 0;
6651 		}
6652 		/* append in the AUTH chunks */
6653 		if (chunks != NULL) {
6654 			memcpy(new_key->key + keylen, chunks,
6655 			    sizeof(*chunks) + num_chunks);
6656 			keylen += sizeof(*chunks) + num_chunks;
6657 		}
6658 		/* append in the HMACs */
6659 		if (hmacs != NULL) {
6660 			memcpy(new_key->key + keylen, hmacs,
6661 			    sizeof(*hmacs) + hmacs_len);
6662 		}
6663 	} else {
6664 		/* failed to get memory for the key */
6665 		return (-34);
6666 	}
6667 	if (stcb->asoc.authinfo.peer_random != NULL)
6668 		sctp_free_key(stcb->asoc.authinfo.peer_random);
6669 	stcb->asoc.authinfo.peer_random = new_key;
6670 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6671 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6672 
6673 	return (0);
6674 }
6675 
6676 int
6677 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6678     struct sctp_nets *net)
6679 {
6680 	/* make sure the requested primary address exists in the assoc */
6681 	if (net == NULL && sa)
6682 		net = sctp_findnet(stcb, sa);
6683 
6684 	if (net == NULL) {
6685 		/* didn't find the requested primary address! */
6686 		return (-1);
6687 	} else {
6688 		/* set the primary address */
6689 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6690 			/* Must be confirmed, so queue to set */
6691 			net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6692 			return (0);
6693 		}
6694 		stcb->asoc.primary_destination = net;
6695 		if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6696 			sctp_free_remote_addr(stcb->asoc.alternate);
6697 			stcb->asoc.alternate = NULL;
6698 		}
6699 		net = TAILQ_FIRST(&stcb->asoc.nets);
6700 		if (net != stcb->asoc.primary_destination) {
6701 			/*
6702 			 * first one on the list is NOT the primary
6703 			 * sctp_cmpaddr() is much more efficient if the
6704 			 * primary is the first on the list, make it so.
6705 			 */
6706 			TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6707 			TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6708 		}
6709 		return (0);
6710 	}
6711 }
6712 
6713 bool
6714 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6715 {
6716 	struct sctpasochead *head;
6717 	struct sctp_tcb *stcb;
6718 
6719 	SCTP_INP_INFO_LOCK_ASSERT();
6720 
6721 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))];
6722 	LIST_FOREACH(stcb, head, sctp_asocs) {
6723 		/*
6724 		 * We choose not to lock anything here. TCB's can't be
6725 		 * removed since we have the read lock, so they can't be
6726 		 * freed on us, same thing for the INP. I may be wrong with
6727 		 * this assumption, but we will go with it for now :-)
6728 		 */
6729 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6730 			continue;
6731 		}
6732 		if (stcb->asoc.my_vtag == tag) {
6733 			/* candidate */
6734 			if (stcb->rport != rport) {
6735 				continue;
6736 			}
6737 			if (stcb->sctp_ep->sctp_lport != lport) {
6738 				continue;
6739 			}
6740 			/* The tag is currently used, so don't use it. */
6741 			return (false);
6742 		}
6743 	}
6744 	return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec));
6745 }
6746 
6747 static void
6748 sctp_drain_mbufs(struct sctp_tcb *stcb)
6749 {
6750 	/*
6751 	 * We must hunt this association for MBUF's past the cumack (i.e.
6752 	 * out of order data that we can renege on).
6753 	 */
6754 	struct sctp_association *asoc;
6755 	struct sctp_tmit_chunk *chk, *nchk;
6756 	uint32_t cumulative_tsn_p1;
6757 	struct sctp_queued_to_read *control, *ncontrol;
6758 	int cnt, strmat;
6759 	uint32_t gap, i;
6760 	int fnd = 0;
6761 
6762 	/* We look for anything larger than the cum-ack + 1 */
6763 
6764 	asoc = &stcb->asoc;
6765 	if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6766 		/* none we can reneg on. */
6767 		return;
6768 	}
6769 	SCTP_STAT_INCR(sctps_protocol_drains_done);
6770 	cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6771 	cnt = 0;
6772 	/* Ok that was fun, now we will drain all the inbound streams? */
6773 	for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6774 		TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6775 #ifdef INVARIANTS
6776 			if (control->on_strm_q != SCTP_ON_ORDERED) {
6777 				panic("Huh control: %p on_q: %d -- not ordered?",
6778 				    control, control->on_strm_q);
6779 			}
6780 #endif
6781 			if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6782 				/* Yep it is above cum-ack */
6783 				cnt++;
6784 				SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6785 				KASSERT(control->length > 0, ("control has zero length"));
6786 				if (asoc->size_on_all_streams >= control->length) {
6787 					asoc->size_on_all_streams -= control->length;
6788 				} else {
6789 #ifdef INVARIANTS
6790 					panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6791 #else
6792 					asoc->size_on_all_streams = 0;
6793 #endif
6794 				}
6795 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6796 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6797 				if (control->on_read_q) {
6798 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6799 					control->on_read_q = 0;
6800 				}
6801 				TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6802 				control->on_strm_q = 0;
6803 				if (control->data) {
6804 					sctp_m_freem(control->data);
6805 					control->data = NULL;
6806 				}
6807 				sctp_free_remote_addr(control->whoFrom);
6808 				/* Now its reasm? */
6809 				TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6810 					cnt++;
6811 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6812 					KASSERT(chk->send_size > 0, ("chunk has zero length"));
6813 					if (asoc->size_on_reasm_queue >= chk->send_size) {
6814 						asoc->size_on_reasm_queue -= chk->send_size;
6815 					} else {
6816 #ifdef INVARIANTS
6817 						panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6818 #else
6819 						asoc->size_on_reasm_queue = 0;
6820 #endif
6821 					}
6822 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6823 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6824 					TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6825 					if (chk->data) {
6826 						sctp_m_freem(chk->data);
6827 						chk->data = NULL;
6828 					}
6829 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6830 				}
6831 				sctp_free_a_readq(stcb, control);
6832 			}
6833 		}
6834 		TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6835 #ifdef INVARIANTS
6836 			if (control->on_strm_q != SCTP_ON_UNORDERED) {
6837 				panic("Huh control: %p on_q: %d -- not unordered?",
6838 				    control, control->on_strm_q);
6839 			}
6840 #endif
6841 			if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6842 				/* Yep it is above cum-ack */
6843 				cnt++;
6844 				SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6845 				KASSERT(control->length > 0, ("control has zero length"));
6846 				if (asoc->size_on_all_streams >= control->length) {
6847 					asoc->size_on_all_streams -= control->length;
6848 				} else {
6849 #ifdef INVARIANTS
6850 					panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6851 #else
6852 					asoc->size_on_all_streams = 0;
6853 #endif
6854 				}
6855 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6856 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6857 				if (control->on_read_q) {
6858 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6859 					control->on_read_q = 0;
6860 				}
6861 				TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6862 				control->on_strm_q = 0;
6863 				if (control->data) {
6864 					sctp_m_freem(control->data);
6865 					control->data = NULL;
6866 				}
6867 				sctp_free_remote_addr(control->whoFrom);
6868 				/* Now its reasm? */
6869 				TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6870 					cnt++;
6871 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6872 					KASSERT(chk->send_size > 0, ("chunk has zero length"));
6873 					if (asoc->size_on_reasm_queue >= chk->send_size) {
6874 						asoc->size_on_reasm_queue -= chk->send_size;
6875 					} else {
6876 #ifdef INVARIANTS
6877 						panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6878 #else
6879 						asoc->size_on_reasm_queue = 0;
6880 #endif
6881 					}
6882 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6883 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6884 					TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6885 					if (chk->data) {
6886 						sctp_m_freem(chk->data);
6887 						chk->data = NULL;
6888 					}
6889 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6890 				}
6891 				sctp_free_a_readq(stcb, control);
6892 			}
6893 		}
6894 	}
6895 	if (cnt) {
6896 		/* We must back down to see what the new highest is */
6897 		for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6898 			SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6899 			if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6900 				asoc->highest_tsn_inside_map = i;
6901 				fnd = 1;
6902 				break;
6903 			}
6904 		}
6905 		if (!fnd) {
6906 			asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6907 		}
6908 
6909 		/*
6910 		 * Question, should we go through the delivery queue? The
6911 		 * only reason things are on here is the app not reading OR
6912 		 * a p-d-api up. An attacker COULD send enough in to
6913 		 * initiate the PD-API and then send a bunch of stuff to
6914 		 * other streams... these would wind up on the delivery
6915 		 * queue.. and then we would not get to them. But in order
6916 		 * to do this I then have to back-track and un-deliver
6917 		 * sequence numbers in streams.. el-yucko. I think for now
6918 		 * we will NOT look at the delivery queue and leave it to be
6919 		 * something to consider later. An alternative would be to
6920 		 * abort the P-D-API with a notification and then deliver
6921 		 * the data.... Or another method might be to keep track of
6922 		 * how many times the situation occurs and if we see a
6923 		 * possible attack underway just abort the association.
6924 		 */
6925 #ifdef SCTP_DEBUG
6926 		SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6927 #endif
6928 		/*
6929 		 * Now do we need to find a new
6930 		 * asoc->highest_tsn_inside_map?
6931 		 */
6932 		asoc->last_revoke_count = cnt;
6933 		sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6934 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6935 		/* sa_ignore NO_NULL_CHK */
6936 		sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6937 		sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6938 	}
6939 	/*
6940 	 * Another issue, in un-setting the TSN's in the mapping array we
6941 	 * DID NOT adjust the highest_tsn marker.  This will cause one of
6942 	 * two things to occur. It may cause us to do extra work in checking
6943 	 * for our mapping array movement. More importantly it may cause us
6944 	 * to SACK every datagram. This may not be a bad thing though since
6945 	 * we will recover once we get our cum-ack above and all this stuff
6946 	 * we dumped recovered.
6947 	 */
6948 }
6949 
6950 void
6951 sctp_drain()
6952 {
6953 	/*
6954 	 * We must walk the PCB lists for ALL associations here. The system
6955 	 * is LOW on MBUF's and needs help. This is where reneging will
6956 	 * occur. We really hope this does NOT happen!
6957 	 */
6958 	VNET_ITERATOR_DECL(vnet_iter);
6959 	VNET_LIST_RLOCK_NOSLEEP();
6960 	VNET_FOREACH(vnet_iter) {
6961 		CURVNET_SET(vnet_iter);
6962 		struct sctp_inpcb *inp;
6963 		struct sctp_tcb *stcb;
6964 
6965 		SCTP_STAT_INCR(sctps_protocol_drain_calls);
6966 		if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6967 #ifdef VIMAGE
6968 			continue;
6969 #else
6970 			return;
6971 #endif
6972 		}
6973 		SCTP_INP_INFO_RLOCK();
6974 		LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6975 			/* For each endpoint */
6976 			SCTP_INP_RLOCK(inp);
6977 			LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6978 				/* For each association */
6979 				SCTP_TCB_LOCK(stcb);
6980 				sctp_drain_mbufs(stcb);
6981 				SCTP_TCB_UNLOCK(stcb);
6982 			}
6983 			SCTP_INP_RUNLOCK(inp);
6984 		}
6985 		SCTP_INP_INFO_RUNLOCK();
6986 		CURVNET_RESTORE();
6987 	}
6988 	VNET_LIST_RUNLOCK_NOSLEEP();
6989 }
6990 
6991 /*
6992  * start a new iterator
6993  * iterates through all endpoints and associations based on the pcb_state
6994  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6995  * assocs and "ef" (optional) is executed when the iterator completes.
6996  * "inpf" (optional) is executed for each new endpoint as it is being
6997  * iterated through. inpe (optional) is called when the inp completes
6998  * its way through all the stcbs.
6999  */
7000 int
7001 sctp_initiate_iterator(inp_func inpf,
7002     asoc_func af,
7003     inp_func inpe,
7004     uint32_t pcb_state,
7005     uint32_t pcb_features,
7006     uint32_t asoc_state,
7007     void *argp,
7008     uint32_t argi,
7009     end_func ef,
7010     struct sctp_inpcb *s_inp,
7011     uint8_t chunk_output_off)
7012 {
7013 	struct sctp_iterator *it = NULL;
7014 
7015 	if (af == NULL) {
7016 		return (-1);
7017 	}
7018 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7019 		SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7020 		    SCTP_BASE_VAR(sctp_pcb_initialized));
7021 		return (-1);
7022 	}
7023 	SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7024 	    SCTP_M_ITER);
7025 	if (it == NULL) {
7026 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7027 		return (-1);
7028 	}
7029 	memset(it, 0, sizeof(*it));
7030 	it->function_assoc = af;
7031 	it->function_inp = inpf;
7032 	if (inpf)
7033 		it->done_current_ep = 0;
7034 	else
7035 		it->done_current_ep = 1;
7036 	it->function_atend = ef;
7037 	it->pointer = argp;
7038 	it->val = argi;
7039 	it->pcb_flags = pcb_state;
7040 	it->pcb_features = pcb_features;
7041 	it->asoc_state = asoc_state;
7042 	it->function_inp_end = inpe;
7043 	it->no_chunk_output = chunk_output_off;
7044 	it->vn = curvnet;
7045 	if (s_inp) {
7046 		/* Assume lock is held here */
7047 		it->inp = s_inp;
7048 		SCTP_INP_INCR_REF(it->inp);
7049 		it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7050 	} else {
7051 		SCTP_INP_INFO_RLOCK();
7052 		it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7053 		if (it->inp) {
7054 			SCTP_INP_INCR_REF(it->inp);
7055 		}
7056 		SCTP_INP_INFO_RUNLOCK();
7057 		it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7058 	}
7059 	SCTP_IPI_ITERATOR_WQ_LOCK();
7060 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7061 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
7062 		SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7063 		    SCTP_BASE_VAR(sctp_pcb_initialized), it);
7064 		SCTP_FREE(it, SCTP_M_ITER);
7065 		return (-1);
7066 	}
7067 	TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7068 	if (sctp_it_ctl.iterator_running == 0) {
7069 		sctp_wakeup_iterator();
7070 	}
7071 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
7072 	/* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7073 	return (0);
7074 }
7075