xref: /freebsd/sys/netinet/sctp_pcb.c (revision b4e38a41f584ad4391c04b8cfec81f46176b18b0)
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 
193 struct sctp_ifn *
194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
195 {
196 	struct sctp_ifn *sctp_ifnp;
197 	struct sctp_ifnlist *hash_ifn_head;
198 
199 	/*
200 	 * We assume the lock is held for the addresses if that's wrong
201 	 * problems could occur :-)
202 	 */
203 	SCTP_IPI_ADDR_LOCK_ASSERT();
204 	hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
205 	LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
206 		if (sctp_ifnp->ifn_index == ifn_index) {
207 			return (sctp_ifnp);
208 		}
209 		if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
210 			return (sctp_ifnp);
211 		}
212 	}
213 	return (NULL);
214 }
215 
216 
217 struct sctp_vrf *
218 sctp_find_vrf(uint32_t vrf_id)
219 {
220 	struct sctp_vrflist *bucket;
221 	struct sctp_vrf *liste;
222 
223 	bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
224 	LIST_FOREACH(liste, bucket, next_vrf) {
225 		if (vrf_id == liste->vrf_id) {
226 			return (liste);
227 		}
228 	}
229 	return (NULL);
230 }
231 
232 
233 void
234 sctp_free_vrf(struct sctp_vrf *vrf)
235 {
236 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
237 		if (vrf->vrf_addr_hash) {
238 			SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
239 			vrf->vrf_addr_hash = NULL;
240 		}
241 		/* We zero'd the count */
242 		LIST_REMOVE(vrf, next_vrf);
243 		SCTP_FREE(vrf, SCTP_M_VRF);
244 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
245 	}
246 }
247 
248 
249 void
250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
251 {
252 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
253 		/* We zero'd the count */
254 		if (sctp_ifnp->vrf) {
255 			sctp_free_vrf(sctp_ifnp->vrf);
256 		}
257 		SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
258 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
259 	}
260 }
261 
262 
263 void
264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
265 {
266 	struct sctp_ifn *sctp_ifnp;
267 
268 	sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
269 	if (sctp_ifnp != NULL) {
270 		sctp_ifnp->ifn_mtu = mtu;
271 	}
272 }
273 
274 
275 void
276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
277 {
278 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
279 		/* We zero'd the count */
280 		if (sctp_ifap->ifn_p) {
281 			sctp_free_ifn(sctp_ifap->ifn_p);
282 		}
283 		SCTP_FREE(sctp_ifap, SCTP_M_IFA);
284 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
285 	}
286 }
287 
288 
289 static void
290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
291 {
292 	struct sctp_ifn *found;
293 
294 	found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
295 	if (found == NULL) {
296 		/* Not in the list.. sorry */
297 		return;
298 	}
299 	if (hold_addr_lock == 0) {
300 		SCTP_IPI_ADDR_WLOCK();
301 	} else {
302 		SCTP_IPI_ADDR_WLOCK_ASSERT();
303 	}
304 	LIST_REMOVE(sctp_ifnp, next_bucket);
305 	LIST_REMOVE(sctp_ifnp, next_ifn);
306 	if (hold_addr_lock == 0) {
307 		SCTP_IPI_ADDR_WUNLOCK();
308 	}
309 	/* Take away the reference, and possibly free it */
310 	sctp_free_ifn(sctp_ifnp);
311 }
312 
313 
314 void
315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
316     const char *if_name, uint32_t ifn_index)
317 {
318 	struct sctp_vrf *vrf;
319 	struct sctp_ifa *sctp_ifap;
320 
321 	SCTP_IPI_ADDR_RLOCK();
322 	vrf = sctp_find_vrf(vrf_id);
323 	if (vrf == NULL) {
324 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
325 		goto out;
326 
327 	}
328 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
329 	if (sctp_ifap == NULL) {
330 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
331 		goto out;
332 	}
333 	if (sctp_ifap->ifn_p == NULL) {
334 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
335 		goto out;
336 	}
337 	if (if_name) {
338 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
339 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
340 			    sctp_ifap->ifn_p->ifn_name, if_name);
341 			goto out;
342 		}
343 	} else {
344 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
345 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
346 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
347 			goto out;
348 		}
349 	}
350 
351 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
352 	sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
353 out:
354 	SCTP_IPI_ADDR_RUNLOCK();
355 }
356 
357 
358 void
359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
360     const char *if_name, uint32_t ifn_index)
361 {
362 	struct sctp_vrf *vrf;
363 	struct sctp_ifa *sctp_ifap;
364 
365 	SCTP_IPI_ADDR_RLOCK();
366 	vrf = sctp_find_vrf(vrf_id);
367 	if (vrf == NULL) {
368 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
369 		goto out;
370 
371 	}
372 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
373 	if (sctp_ifap == NULL) {
374 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
375 		goto out;
376 	}
377 	if (sctp_ifap->ifn_p == NULL) {
378 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
379 		goto out;
380 	}
381 	if (if_name) {
382 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
383 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
384 			    sctp_ifap->ifn_p->ifn_name, if_name);
385 			goto out;
386 		}
387 	} else {
388 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
389 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
390 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
391 			goto out;
392 		}
393 	}
394 
395 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
396 	sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
397 out:
398 	SCTP_IPI_ADDR_RUNLOCK();
399 }
400 
401 
402 /*-
403  * Add an ifa to an ifn.
404  * Register the interface as necessary.
405  * NOTE: ADDR write lock MUST be held.
406  */
407 static void
408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
409 {
410 	int ifa_af;
411 
412 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
413 	sctp_ifap->ifn_p = sctp_ifnp;
414 	atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
415 	/* update address counts */
416 	sctp_ifnp->ifa_count++;
417 	ifa_af = sctp_ifap->address.sa.sa_family;
418 	switch (ifa_af) {
419 #ifdef INET
420 	case AF_INET:
421 		sctp_ifnp->num_v4++;
422 		break;
423 #endif
424 #ifdef INET6
425 	case AF_INET6:
426 		sctp_ifnp->num_v6++;
427 		break;
428 #endif
429 	default:
430 		break;
431 	}
432 	if (sctp_ifnp->ifa_count == 1) {
433 		/* register the new interface */
434 		sctp_ifnp->registered_af = ifa_af;
435 	}
436 }
437 
438 
439 /*-
440  * Remove an ifa from its ifn.
441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
442  * the interface based on the remaining address families left.
443  * NOTE: ADDR write lock MUST be held.
444  */
445 static void
446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
447 {
448 	LIST_REMOVE(sctp_ifap, next_ifa);
449 	if (sctp_ifap->ifn_p) {
450 		/* update address counts */
451 		sctp_ifap->ifn_p->ifa_count--;
452 		switch (sctp_ifap->address.sa.sa_family) {
453 #ifdef INET
454 		case AF_INET:
455 			sctp_ifap->ifn_p->num_v4--;
456 			break;
457 #endif
458 #ifdef INET6
459 		case AF_INET6:
460 			sctp_ifap->ifn_p->num_v6--;
461 			break;
462 #endif
463 		default:
464 			break;
465 		}
466 
467 		if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
468 			/* remove the ifn, possibly freeing it */
469 			sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
470 		} else {
471 			/* re-register address family type, if needed */
472 			if ((sctp_ifap->ifn_p->num_v6 == 0) &&
473 			    (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
474 				sctp_ifap->ifn_p->registered_af = AF_INET;
475 			} else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
476 			    (sctp_ifap->ifn_p->registered_af == AF_INET)) {
477 				sctp_ifap->ifn_p->registered_af = AF_INET6;
478 			}
479 			/* free the ifn refcount */
480 			sctp_free_ifn(sctp_ifap->ifn_p);
481 		}
482 		sctp_ifap->ifn_p = NULL;
483 	}
484 }
485 
486 
487 struct sctp_ifa *
488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
489     uint32_t ifn_type, const char *if_name, void *ifa,
490     struct sockaddr *addr, uint32_t ifa_flags,
491     int dynamic_add)
492 {
493 	struct sctp_vrf *vrf;
494 	struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp;
495 	struct sctp_ifa *sctp_ifap, *new_sctp_ifap;
496 	struct sctp_ifalist *hash_addr_head;
497 	struct sctp_ifnlist *hash_ifn_head;
498 	uint32_t hash_of_addr;
499 	int new_ifn_af = 0;
500 
501 #ifdef SCTP_DEBUG
502 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
503 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
504 #endif
505 	SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *,
506 	    sizeof(struct sctp_ifn), SCTP_M_IFN);
507 	if (new_sctp_ifnp == NULL) {
508 #ifdef INVARIANTS
509 		panic("No memory for IFN");
510 #endif
511 		return (NULL);
512 	}
513 	SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
514 	if (new_sctp_ifap == NULL) {
515 #ifdef INVARIANTS
516 		panic("No memory for IFA");
517 #endif
518 		SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
519 		return (NULL);
520 	}
521 
522 	SCTP_IPI_ADDR_WLOCK();
523 	sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
524 	if (sctp_ifnp) {
525 		vrf = sctp_ifnp->vrf;
526 	} else {
527 		vrf = sctp_find_vrf(vrf_id);
528 		if (vrf == NULL) {
529 			vrf = sctp_allocate_vrf(vrf_id);
530 			if (vrf == NULL) {
531 				SCTP_IPI_ADDR_WUNLOCK();
532 				SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
533 				SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
534 				return (NULL);
535 			}
536 		}
537 	}
538 	if (sctp_ifnp == NULL) {
539 		/*
540 		 * build one and add it, can't hold lock until after malloc
541 		 * done though.
542 		 */
543 		sctp_ifnp = new_sctp_ifnp;
544 		new_sctp_ifnp = NULL;
545 		memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
546 		sctp_ifnp->ifn_index = ifn_index;
547 		sctp_ifnp->ifn_p = ifn;
548 		sctp_ifnp->ifn_type = ifn_type;
549 		sctp_ifnp->refcount = 0;
550 		sctp_ifnp->vrf = vrf;
551 		atomic_add_int(&vrf->refcount, 1);
552 		sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
553 		if (if_name != NULL) {
554 			SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
555 		} else {
556 			SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
557 		}
558 		hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
559 		LIST_INIT(&sctp_ifnp->ifalist);
560 		LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
561 		LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
562 		atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
563 		new_ifn_af = 1;
564 	}
565 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
566 	if (sctp_ifap) {
567 		/* Hmm, it already exists? */
568 		if ((sctp_ifap->ifn_p) &&
569 		    (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
570 			SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
571 			    sctp_ifap->ifn_p->ifn_name, ifn_index,
572 			    (void *)sctp_ifap);
573 			if (new_ifn_af) {
574 				/* Remove the created one that we don't want */
575 				sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
576 			}
577 			if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
578 				/* easy to solve, just switch back to active */
579 				SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
580 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
581 				sctp_ifap->ifn_p = sctp_ifnp;
582 				atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
583 			}
584 	exit_stage_left:
585 			SCTP_IPI_ADDR_WUNLOCK();
586 			if (new_sctp_ifnp != NULL) {
587 				SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
588 			}
589 			SCTP_FREE(new_sctp_ifap, SCTP_M_IFA);
590 			return (sctp_ifap);
591 		} else {
592 			if (sctp_ifap->ifn_p) {
593 				/*
594 				 * The last IFN gets the address, remove the
595 				 * old one
596 				 */
597 				SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
598 				    (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
599 				    sctp_ifap->ifn_p->ifn_index, if_name,
600 				    ifn_index);
601 				/* remove the address from the old ifn */
602 				sctp_remove_ifa_from_ifn(sctp_ifap);
603 				/* move the address over to the new ifn */
604 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
605 				goto exit_stage_left;
606 			} else {
607 				/* repair ifnp which was NULL ? */
608 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
609 				SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
610 				    (void *)sctp_ifnp, (void *)sctp_ifap);
611 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
612 			}
613 			goto exit_stage_left;
614 		}
615 	}
616 	sctp_ifap = new_sctp_ifap;
617 	memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
618 	sctp_ifap->ifn_p = sctp_ifnp;
619 	atomic_add_int(&sctp_ifnp->refcount, 1);
620 	sctp_ifap->vrf_id = vrf_id;
621 	sctp_ifap->ifa = ifa;
622 	memcpy(&sctp_ifap->address, addr, addr->sa_len);
623 	sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
624 	sctp_ifap->flags = ifa_flags;
625 	/* Set scope */
626 	switch (sctp_ifap->address.sa.sa_family) {
627 #ifdef INET
628 	case AF_INET:
629 		{
630 			struct sockaddr_in *sin;
631 
632 			sin = &sctp_ifap->address.sin;
633 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
634 			    (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
635 				sctp_ifap->src_is_loop = 1;
636 			}
637 			if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
638 				sctp_ifap->src_is_priv = 1;
639 			}
640 			sctp_ifnp->num_v4++;
641 			if (new_ifn_af)
642 				new_ifn_af = AF_INET;
643 			break;
644 		}
645 #endif
646 #ifdef INET6
647 	case AF_INET6:
648 		{
649 			/* ok to use deprecated addresses? */
650 			struct sockaddr_in6 *sin6;
651 
652 			sin6 = &sctp_ifap->address.sin6;
653 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
654 			    (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
655 				sctp_ifap->src_is_loop = 1;
656 			}
657 			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
658 				sctp_ifap->src_is_priv = 1;
659 			}
660 			sctp_ifnp->num_v6++;
661 			if (new_ifn_af)
662 				new_ifn_af = AF_INET6;
663 			break;
664 		}
665 #endif
666 	default:
667 		new_ifn_af = 0;
668 		break;
669 	}
670 	hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
671 
672 	if ((sctp_ifap->src_is_priv == 0) &&
673 	    (sctp_ifap->src_is_loop == 0)) {
674 		sctp_ifap->src_is_glob = 1;
675 	}
676 	hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
677 	LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
678 	sctp_ifap->refcount = 1;
679 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
680 	sctp_ifnp->ifa_count++;
681 	vrf->total_ifa_count++;
682 	atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
683 	if (new_ifn_af) {
684 		sctp_ifnp->registered_af = new_ifn_af;
685 	}
686 	SCTP_IPI_ADDR_WUNLOCK();
687 	if (new_sctp_ifnp != NULL) {
688 		SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN);
689 	}
690 
691 	if (dynamic_add) {
692 		/*
693 		 * Bump up the refcount so that when the timer completes it
694 		 * will drop back down.
695 		 */
696 		struct sctp_laddr *wi;
697 
698 		atomic_add_int(&sctp_ifap->refcount, 1);
699 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
700 		if (wi == NULL) {
701 			/*
702 			 * Gak, what can we do? We have lost an address
703 			 * change can you say HOSED?
704 			 */
705 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
706 			/* Opps, must decrement the count */
707 			sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
708 			    if_name);
709 			return (NULL);
710 		}
711 		SCTP_INCR_LADDR_COUNT();
712 		memset(wi, 0, sizeof(*wi));
713 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
714 		wi->ifa = sctp_ifap;
715 		wi->action = SCTP_ADD_IP_ADDRESS;
716 
717 		SCTP_WQ_ADDR_LOCK();
718 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
719 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
720 		    (struct sctp_inpcb *)NULL,
721 		    (struct sctp_tcb *)NULL,
722 		    (struct sctp_nets *)NULL);
723 		SCTP_WQ_ADDR_UNLOCK();
724 	} else {
725 		/* it's ready for use */
726 		sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
727 	}
728 	return (sctp_ifap);
729 }
730 
731 void
732 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
733     uint32_t ifn_index, const char *if_name)
734 {
735 	struct sctp_vrf *vrf;
736 	struct sctp_ifa *sctp_ifap = NULL;
737 
738 	SCTP_IPI_ADDR_WLOCK();
739 	vrf = sctp_find_vrf(vrf_id);
740 	if (vrf == NULL) {
741 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
742 		goto out_now;
743 	}
744 
745 #ifdef SCTP_DEBUG
746 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
747 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
748 #endif
749 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
750 	if (sctp_ifap) {
751 		/* Validate the delete */
752 		if (sctp_ifap->ifn_p) {
753 			int valid = 0;
754 
755 			/*-
756 			 * The name has priority over the ifn_index
757 			 * if its given.
758 			 */
759 			if (if_name) {
760 				if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
761 					/* They match its a correct delete */
762 					valid = 1;
763 				}
764 			}
765 			if (!valid) {
766 				/* last ditch check ifn_index */
767 				if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
768 					valid = 1;
769 				}
770 			}
771 			if (!valid) {
772 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
773 				    ifn_index, ((if_name == NULL) ? "NULL" : if_name));
774 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
775 				    sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
776 				SCTP_IPI_ADDR_WUNLOCK();
777 				return;
778 			}
779 		}
780 		SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
781 		sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
782 		/*
783 		 * We don't set the flag. This means that the structure will
784 		 * hang around in EP's that have bound specific to it until
785 		 * they close. This gives us TCP like behavior if someone
786 		 * removes an address (or for that matter adds it right
787 		 * back).
788 		 */
789 		/* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
790 		vrf->total_ifa_count--;
791 		LIST_REMOVE(sctp_ifap, next_bucket);
792 		sctp_remove_ifa_from_ifn(sctp_ifap);
793 	}
794 #ifdef SCTP_DEBUG
795 	else {
796 		SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
797 		    ifn_index);
798 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
799 	}
800 #endif
801 
802 out_now:
803 	SCTP_IPI_ADDR_WUNLOCK();
804 	if (sctp_ifap) {
805 		struct sctp_laddr *wi;
806 
807 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
808 		if (wi == NULL) {
809 			/*
810 			 * Gak, what can we do? We have lost an address
811 			 * change can you say HOSED?
812 			 */
813 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
814 
815 			/* Oops, must decrement the count */
816 			sctp_free_ifa(sctp_ifap);
817 			return;
818 		}
819 		SCTP_INCR_LADDR_COUNT();
820 		memset(wi, 0, sizeof(*wi));
821 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
822 		wi->ifa = sctp_ifap;
823 		wi->action = SCTP_DEL_IP_ADDRESS;
824 		SCTP_WQ_ADDR_LOCK();
825 		/*
826 		 * Should this really be a tailq? As it is we will process
827 		 * the newest first :-0
828 		 */
829 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
830 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
831 		    (struct sctp_inpcb *)NULL,
832 		    (struct sctp_tcb *)NULL,
833 		    (struct sctp_nets *)NULL);
834 		SCTP_WQ_ADDR_UNLOCK();
835 	}
836 	return;
837 }
838 
839 
840 static int
841 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
842 {
843 	int loopback_scope;
844 #if defined(INET)
845 	int ipv4_local_scope, ipv4_addr_legal;
846 #endif
847 #if defined(INET6)
848 	int local_scope, site_scope, ipv6_addr_legal;
849 #endif
850 	struct sctp_vrf *vrf;
851 	struct sctp_ifn *sctp_ifn;
852 	struct sctp_ifa *sctp_ifa;
853 
854 	loopback_scope = stcb->asoc.scope.loopback_scope;
855 #if defined(INET)
856 	ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
857 	ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
858 #endif
859 #if defined(INET6)
860 	local_scope = stcb->asoc.scope.local_scope;
861 	site_scope = stcb->asoc.scope.site_scope;
862 	ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
863 #endif
864 
865 	SCTP_IPI_ADDR_RLOCK();
866 	vrf = sctp_find_vrf(stcb->asoc.vrf_id);
867 	if (vrf == NULL) {
868 		/* no vrf, no addresses */
869 		SCTP_IPI_ADDR_RUNLOCK();
870 		return (0);
871 	}
872 
873 	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
874 		LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
875 			if ((loopback_scope == 0) &&
876 			    SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
877 				continue;
878 			}
879 			LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
880 				if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
881 				    (!sctp_is_addr_pending(stcb, sctp_ifa))) {
882 					/*
883 					 * We allow pending addresses, where
884 					 * we have sent an asconf-add to be
885 					 * considered valid.
886 					 */
887 					continue;
888 				}
889 				if (sctp_ifa->address.sa.sa_family != to->sa_family) {
890 					continue;
891 				}
892 				switch (sctp_ifa->address.sa.sa_family) {
893 #ifdef INET
894 				case AF_INET:
895 					if (ipv4_addr_legal) {
896 						struct sockaddr_in *sin,
897 						           *rsin;
898 
899 						sin = &sctp_ifa->address.sin;
900 						rsin = (struct sockaddr_in *)to;
901 						if ((ipv4_local_scope == 0) &&
902 						    IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
903 							continue;
904 						}
905 						if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
906 						    &sin->sin_addr) != 0) {
907 							continue;
908 						}
909 						if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
910 							SCTP_IPI_ADDR_RUNLOCK();
911 							return (1);
912 						}
913 					}
914 					break;
915 #endif
916 #ifdef INET6
917 				case AF_INET6:
918 					if (ipv6_addr_legal) {
919 						struct sockaddr_in6 *sin6,
920 						            *rsin6;
921 
922 						sin6 = &sctp_ifa->address.sin6;
923 						rsin6 = (struct sockaddr_in6 *)to;
924 						if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
925 						    &sin6->sin6_addr) != 0) {
926 							continue;
927 						}
928 						if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
929 							if (local_scope == 0)
930 								continue;
931 							if (sin6->sin6_scope_id == 0) {
932 								if (sa6_recoverscope(sin6) != 0)
933 									continue;
934 							}
935 						}
936 						if ((site_scope == 0) &&
937 						    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
938 							continue;
939 						}
940 						if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
941 							SCTP_IPI_ADDR_RUNLOCK();
942 							return (1);
943 						}
944 					}
945 					break;
946 #endif
947 				default:
948 					/* TSNH */
949 					break;
950 				}
951 			}
952 		}
953 	} else {
954 		struct sctp_laddr *laddr;
955 
956 		LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
957 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
958 				SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
959 				continue;
960 			}
961 			if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
962 			    (!sctp_is_addr_pending(stcb, laddr->ifa))) {
963 				/*
964 				 * We allow pending addresses, where we have
965 				 * sent an asconf-add to be considered
966 				 * valid.
967 				 */
968 				continue;
969 			}
970 			if (laddr->ifa->address.sa.sa_family != to->sa_family) {
971 				continue;
972 			}
973 			switch (to->sa_family) {
974 #ifdef INET
975 			case AF_INET:
976 				{
977 					struct sockaddr_in *sin, *rsin;
978 
979 					sin = &laddr->ifa->address.sin;
980 					rsin = (struct sockaddr_in *)to;
981 					if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
982 						SCTP_IPI_ADDR_RUNLOCK();
983 						return (1);
984 					}
985 					break;
986 				}
987 #endif
988 #ifdef INET6
989 			case AF_INET6:
990 				{
991 					struct sockaddr_in6 *sin6, *rsin6;
992 
993 					sin6 = &laddr->ifa->address.sin6;
994 					rsin6 = (struct sockaddr_in6 *)to;
995 					if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
996 						SCTP_IPI_ADDR_RUNLOCK();
997 						return (1);
998 					}
999 					break;
1000 				}
1001 
1002 #endif
1003 			default:
1004 				/* TSNH */
1005 				break;
1006 			}
1007 
1008 		}
1009 	}
1010 	SCTP_IPI_ADDR_RUNLOCK();
1011 	return (0);
1012 }
1013 
1014 
1015 static struct sctp_tcb *
1016 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1017     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1018 {
1019 	/**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1020 	/*
1021 	 * If we support the TCP model, then we must now dig through to see
1022 	 * if we can find our endpoint in the list of tcp ep's.
1023 	 */
1024 	uint16_t lport, rport;
1025 	struct sctppcbhead *ephead;
1026 	struct sctp_inpcb *inp;
1027 	struct sctp_laddr *laddr;
1028 	struct sctp_tcb *stcb;
1029 	struct sctp_nets *net;
1030 
1031 	if ((to == NULL) || (from == NULL)) {
1032 		return (NULL);
1033 	}
1034 
1035 	switch (to->sa_family) {
1036 #ifdef INET
1037 	case AF_INET:
1038 		if (from->sa_family == AF_INET) {
1039 			lport = ((struct sockaddr_in *)to)->sin_port;
1040 			rport = ((struct sockaddr_in *)from)->sin_port;
1041 		} else {
1042 			return (NULL);
1043 		}
1044 		break;
1045 #endif
1046 #ifdef INET6
1047 	case AF_INET6:
1048 		if (from->sa_family == AF_INET6) {
1049 			lport = ((struct sockaddr_in6 *)to)->sin6_port;
1050 			rport = ((struct sockaddr_in6 *)from)->sin6_port;
1051 		} else {
1052 			return (NULL);
1053 		}
1054 		break;
1055 #endif
1056 	default:
1057 		return (NULL);
1058 	}
1059 	ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1060 	/*
1061 	 * Ok now for each of the guys in this bucket we must look and see:
1062 	 * - Does the remote port match. - Does there single association's
1063 	 * addresses match this address (to). If so we update p_ep to point
1064 	 * to this ep and return the tcb from it.
1065 	 */
1066 	LIST_FOREACH(inp, ephead, sctp_hash) {
1067 		SCTP_INP_RLOCK(inp);
1068 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1069 			SCTP_INP_RUNLOCK(inp);
1070 			continue;
1071 		}
1072 		if (lport != inp->sctp_lport) {
1073 			SCTP_INP_RUNLOCK(inp);
1074 			continue;
1075 		}
1076 		switch (to->sa_family) {
1077 #ifdef INET
1078 		case AF_INET:
1079 			{
1080 				struct sockaddr_in *sin;
1081 
1082 				sin = (struct sockaddr_in *)to;
1083 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1084 				    &sin->sin_addr) != 0) {
1085 					SCTP_INP_RUNLOCK(inp);
1086 					continue;
1087 				}
1088 				break;
1089 			}
1090 #endif
1091 #ifdef INET6
1092 		case AF_INET6:
1093 			{
1094 				struct sockaddr_in6 *sin6;
1095 
1096 				sin6 = (struct sockaddr_in6 *)to;
1097 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1098 				    &sin6->sin6_addr) != 0) {
1099 					SCTP_INP_RUNLOCK(inp);
1100 					continue;
1101 				}
1102 				break;
1103 			}
1104 #endif
1105 		default:
1106 			SCTP_INP_RUNLOCK(inp);
1107 			continue;
1108 		}
1109 		if (inp->def_vrf_id != vrf_id) {
1110 			SCTP_INP_RUNLOCK(inp);
1111 			continue;
1112 		}
1113 		/* check to see if the ep has one of the addresses */
1114 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1115 			/* We are NOT bound all, so look further */
1116 			int match = 0;
1117 
1118 			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1119 
1120 				if (laddr->ifa == NULL) {
1121 					SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1122 					continue;
1123 				}
1124 				if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1125 					SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1126 					continue;
1127 				}
1128 				if (laddr->ifa->address.sa.sa_family ==
1129 				    to->sa_family) {
1130 					/* see if it matches */
1131 #ifdef INET
1132 					if (from->sa_family == AF_INET) {
1133 						struct sockaddr_in *intf_addr,
1134 						           *sin;
1135 
1136 						intf_addr = &laddr->ifa->address.sin;
1137 						sin = (struct sockaddr_in *)to;
1138 						if (sin->sin_addr.s_addr ==
1139 						    intf_addr->sin_addr.s_addr) {
1140 							match = 1;
1141 							break;
1142 						}
1143 					}
1144 #endif
1145 #ifdef INET6
1146 					if (from->sa_family == AF_INET6) {
1147 						struct sockaddr_in6 *intf_addr6;
1148 						struct sockaddr_in6 *sin6;
1149 
1150 						sin6 = (struct sockaddr_in6 *)
1151 						    to;
1152 						intf_addr6 = &laddr->ifa->address.sin6;
1153 
1154 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1155 						    intf_addr6)) {
1156 							match = 1;
1157 							break;
1158 						}
1159 					}
1160 #endif
1161 				}
1162 			}
1163 			if (match == 0) {
1164 				/* This endpoint does not have this address */
1165 				SCTP_INP_RUNLOCK(inp);
1166 				continue;
1167 			}
1168 		}
1169 		/*
1170 		 * Ok if we hit here the ep has the address, does it hold
1171 		 * the tcb?
1172 		 */
1173 		/* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1174 		stcb = LIST_FIRST(&inp->sctp_asoc_list);
1175 		if (stcb == NULL) {
1176 			SCTP_INP_RUNLOCK(inp);
1177 			continue;
1178 		}
1179 		SCTP_TCB_LOCK(stcb);
1180 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1181 			SCTP_TCB_UNLOCK(stcb);
1182 			SCTP_INP_RUNLOCK(inp);
1183 			continue;
1184 		}
1185 		if (stcb->rport != rport) {
1186 			/* remote port does not match. */
1187 			SCTP_TCB_UNLOCK(stcb);
1188 			SCTP_INP_RUNLOCK(inp);
1189 			continue;
1190 		}
1191 		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1192 			SCTP_TCB_UNLOCK(stcb);
1193 			SCTP_INP_RUNLOCK(inp);
1194 			continue;
1195 		}
1196 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1197 			SCTP_TCB_UNLOCK(stcb);
1198 			SCTP_INP_RUNLOCK(inp);
1199 			continue;
1200 		}
1201 		/* Does this TCB have a matching address? */
1202 		TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1203 
1204 			if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1205 				/* not the same family, can't be a match */
1206 				continue;
1207 			}
1208 			switch (from->sa_family) {
1209 #ifdef INET
1210 			case AF_INET:
1211 				{
1212 					struct sockaddr_in *sin, *rsin;
1213 
1214 					sin = (struct sockaddr_in *)&net->ro._l_addr;
1215 					rsin = (struct sockaddr_in *)from;
1216 					if (sin->sin_addr.s_addr ==
1217 					    rsin->sin_addr.s_addr) {
1218 						/* found it */
1219 						if (netp != NULL) {
1220 							*netp = net;
1221 						}
1222 						/*
1223 						 * Update the endpoint
1224 						 * pointer
1225 						 */
1226 						*inp_p = inp;
1227 						SCTP_INP_RUNLOCK(inp);
1228 						return (stcb);
1229 					}
1230 					break;
1231 				}
1232 #endif
1233 #ifdef INET6
1234 			case AF_INET6:
1235 				{
1236 					struct sockaddr_in6 *sin6, *rsin6;
1237 
1238 					sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1239 					rsin6 = (struct sockaddr_in6 *)from;
1240 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1241 					    rsin6)) {
1242 						/* found it */
1243 						if (netp != NULL) {
1244 							*netp = net;
1245 						}
1246 						/*
1247 						 * Update the endpoint
1248 						 * pointer
1249 						 */
1250 						*inp_p = inp;
1251 						SCTP_INP_RUNLOCK(inp);
1252 						return (stcb);
1253 					}
1254 					break;
1255 				}
1256 #endif
1257 			default:
1258 				/* TSNH */
1259 				break;
1260 			}
1261 		}
1262 		SCTP_TCB_UNLOCK(stcb);
1263 		SCTP_INP_RUNLOCK(inp);
1264 	}
1265 	return (NULL);
1266 }
1267 
1268 
1269 /*
1270  * rules for use
1271  *
1272  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1273  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1274  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1275  * NULL.
1276  */
1277 
1278 struct sctp_tcb *
1279 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1280     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1281 {
1282 	struct sctpasochead *head;
1283 	struct sctp_inpcb *inp;
1284 	struct sctp_tcb *stcb = NULL;
1285 	struct sctp_nets *net;
1286 	uint16_t rport;
1287 
1288 	inp = *inp_p;
1289 	switch (remote->sa_family) {
1290 #ifdef INET
1291 	case AF_INET:
1292 		rport = (((struct sockaddr_in *)remote)->sin_port);
1293 		break;
1294 #endif
1295 #ifdef INET6
1296 	case AF_INET6:
1297 		rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1298 		break;
1299 #endif
1300 	default:
1301 		return (NULL);
1302 	}
1303 	if (locked_tcb) {
1304 		/*
1305 		 * UN-lock so we can do proper locking here this occurs when
1306 		 * called from load_addresses_from_init.
1307 		 */
1308 		atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1309 		SCTP_TCB_UNLOCK(locked_tcb);
1310 	}
1311 	SCTP_INP_INFO_RLOCK();
1312 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1313 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1314 		/*-
1315 		 * Now either this guy is our listener or it's the
1316 		 * connector. If it is the one that issued the connect, then
1317 		 * it's only chance is to be the first TCB in the list. If
1318 		 * it is the acceptor, then do the special_lookup to hash
1319 		 * and find the real inp.
1320 		 */
1321 		if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1322 			/* to is peer addr, from is my addr */
1323 			stcb = sctp_tcb_special_locate(inp_p, remote, local,
1324 			    netp, inp->def_vrf_id);
1325 			if ((stcb != NULL) && (locked_tcb == NULL)) {
1326 				/* we have a locked tcb, lower refcount */
1327 				SCTP_INP_DECR_REF(inp);
1328 			}
1329 			if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1330 				SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1331 				SCTP_TCB_LOCK(locked_tcb);
1332 				atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1333 				SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1334 			}
1335 			SCTP_INP_INFO_RUNLOCK();
1336 			return (stcb);
1337 		} else {
1338 			SCTP_INP_WLOCK(inp);
1339 			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1340 				goto null_return;
1341 			}
1342 			stcb = LIST_FIRST(&inp->sctp_asoc_list);
1343 			if (stcb == NULL) {
1344 				goto null_return;
1345 			}
1346 			SCTP_TCB_LOCK(stcb);
1347 
1348 			if (stcb->rport != rport) {
1349 				/* remote port does not match. */
1350 				SCTP_TCB_UNLOCK(stcb);
1351 				goto null_return;
1352 			}
1353 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1354 				SCTP_TCB_UNLOCK(stcb);
1355 				goto null_return;
1356 			}
1357 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1358 				SCTP_TCB_UNLOCK(stcb);
1359 				goto null_return;
1360 			}
1361 			/* now look at the list of remote addresses */
1362 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1363 #ifdef INVARIANTS
1364 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1365 					panic("Corrupt net list");
1366 				}
1367 #endif
1368 				if (net->ro._l_addr.sa.sa_family !=
1369 				    remote->sa_family) {
1370 					/* not the same family */
1371 					continue;
1372 				}
1373 				switch (remote->sa_family) {
1374 #ifdef INET
1375 				case AF_INET:
1376 					{
1377 						struct sockaddr_in *sin,
1378 						           *rsin;
1379 
1380 						sin = (struct sockaddr_in *)
1381 						    &net->ro._l_addr;
1382 						rsin = (struct sockaddr_in *)remote;
1383 						if (sin->sin_addr.s_addr ==
1384 						    rsin->sin_addr.s_addr) {
1385 							/* found it */
1386 							if (netp != NULL) {
1387 								*netp = net;
1388 							}
1389 							if (locked_tcb == NULL) {
1390 								SCTP_INP_DECR_REF(inp);
1391 							} else if (locked_tcb != stcb) {
1392 								SCTP_TCB_LOCK(locked_tcb);
1393 							}
1394 							if (locked_tcb) {
1395 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1396 							}
1397 
1398 							SCTP_INP_WUNLOCK(inp);
1399 							SCTP_INP_INFO_RUNLOCK();
1400 							return (stcb);
1401 						}
1402 						break;
1403 					}
1404 #endif
1405 #ifdef INET6
1406 				case AF_INET6:
1407 					{
1408 						struct sockaddr_in6 *sin6,
1409 						            *rsin6;
1410 
1411 						sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1412 						rsin6 = (struct sockaddr_in6 *)remote;
1413 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1414 						    rsin6)) {
1415 							/* found it */
1416 							if (netp != NULL) {
1417 								*netp = net;
1418 							}
1419 							if (locked_tcb == NULL) {
1420 								SCTP_INP_DECR_REF(inp);
1421 							} else if (locked_tcb != stcb) {
1422 								SCTP_TCB_LOCK(locked_tcb);
1423 							}
1424 							if (locked_tcb) {
1425 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1426 							}
1427 							SCTP_INP_WUNLOCK(inp);
1428 							SCTP_INP_INFO_RUNLOCK();
1429 							return (stcb);
1430 						}
1431 						break;
1432 					}
1433 #endif
1434 				default:
1435 					/* TSNH */
1436 					break;
1437 				}
1438 			}
1439 			SCTP_TCB_UNLOCK(stcb);
1440 		}
1441 	} else {
1442 		SCTP_INP_WLOCK(inp);
1443 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1444 			goto null_return;
1445 		}
1446 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1447 		    inp->sctp_hashmark)];
1448 		LIST_FOREACH(stcb, head, sctp_tcbhash) {
1449 			if (stcb->rport != rport) {
1450 				/* remote port does not match */
1451 				continue;
1452 			}
1453 			SCTP_TCB_LOCK(stcb);
1454 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1455 				SCTP_TCB_UNLOCK(stcb);
1456 				continue;
1457 			}
1458 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1459 				SCTP_TCB_UNLOCK(stcb);
1460 				continue;
1461 			}
1462 			/* now look at the list of remote addresses */
1463 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1464 #ifdef INVARIANTS
1465 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1466 					panic("Corrupt net list");
1467 				}
1468 #endif
1469 				if (net->ro._l_addr.sa.sa_family !=
1470 				    remote->sa_family) {
1471 					/* not the same family */
1472 					continue;
1473 				}
1474 				switch (remote->sa_family) {
1475 #ifdef INET
1476 				case AF_INET:
1477 					{
1478 						struct sockaddr_in *sin,
1479 						           *rsin;
1480 
1481 						sin = (struct sockaddr_in *)
1482 						    &net->ro._l_addr;
1483 						rsin = (struct sockaddr_in *)remote;
1484 						if (sin->sin_addr.s_addr ==
1485 						    rsin->sin_addr.s_addr) {
1486 							/* found it */
1487 							if (netp != NULL) {
1488 								*netp = net;
1489 							}
1490 							if (locked_tcb == NULL) {
1491 								SCTP_INP_DECR_REF(inp);
1492 							} else if (locked_tcb != stcb) {
1493 								SCTP_TCB_LOCK(locked_tcb);
1494 							}
1495 							if (locked_tcb) {
1496 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1497 							}
1498 							SCTP_INP_WUNLOCK(inp);
1499 							SCTP_INP_INFO_RUNLOCK();
1500 							return (stcb);
1501 						}
1502 						break;
1503 					}
1504 #endif
1505 #ifdef INET6
1506 				case AF_INET6:
1507 					{
1508 						struct sockaddr_in6 *sin6,
1509 						            *rsin6;
1510 
1511 						sin6 = (struct sockaddr_in6 *)
1512 						    &net->ro._l_addr;
1513 						rsin6 = (struct sockaddr_in6 *)remote;
1514 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1515 						    rsin6)) {
1516 							/* found it */
1517 							if (netp != NULL) {
1518 								*netp = net;
1519 							}
1520 							if (locked_tcb == NULL) {
1521 								SCTP_INP_DECR_REF(inp);
1522 							} else if (locked_tcb != stcb) {
1523 								SCTP_TCB_LOCK(locked_tcb);
1524 							}
1525 							if (locked_tcb) {
1526 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1527 							}
1528 							SCTP_INP_WUNLOCK(inp);
1529 							SCTP_INP_INFO_RUNLOCK();
1530 							return (stcb);
1531 						}
1532 						break;
1533 					}
1534 #endif
1535 				default:
1536 					/* TSNH */
1537 					break;
1538 				}
1539 			}
1540 			SCTP_TCB_UNLOCK(stcb);
1541 		}
1542 	}
1543 null_return:
1544 	/* clean up for returning null */
1545 	if (locked_tcb) {
1546 		SCTP_TCB_LOCK(locked_tcb);
1547 		atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1548 	}
1549 	SCTP_INP_WUNLOCK(inp);
1550 	SCTP_INP_INFO_RUNLOCK();
1551 	/* not found */
1552 	return (NULL);
1553 }
1554 
1555 
1556 /*
1557  * Find an association for a specific endpoint using the association id given
1558  * out in the COMM_UP notification
1559  */
1560 struct sctp_tcb *
1561 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1562 {
1563 	/*
1564 	 * Use my the assoc_id to find a endpoint
1565 	 */
1566 	struct sctpasochead *head;
1567 	struct sctp_tcb *stcb;
1568 	uint32_t id;
1569 
1570 	if (inp == NULL) {
1571 		SCTP_PRINTF("TSNH ep_associd\n");
1572 		return (NULL);
1573 	}
1574 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1575 		SCTP_PRINTF("TSNH ep_associd0\n");
1576 		return (NULL);
1577 	}
1578 	id = (uint32_t)asoc_id;
1579 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1580 	if (head == NULL) {
1581 		/* invalid id TSNH */
1582 		SCTP_PRINTF("TSNH ep_associd1\n");
1583 		return (NULL);
1584 	}
1585 	LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1586 		if (stcb->asoc.assoc_id == id) {
1587 			if (inp != stcb->sctp_ep) {
1588 				/*
1589 				 * some other guy has the same id active (id
1590 				 * collision ??).
1591 				 */
1592 				SCTP_PRINTF("TSNH ep_associd2\n");
1593 				continue;
1594 			}
1595 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1596 				continue;
1597 			}
1598 			if (want_lock) {
1599 				SCTP_TCB_LOCK(stcb);
1600 			}
1601 			return (stcb);
1602 		}
1603 	}
1604 	return (NULL);
1605 }
1606 
1607 
1608 struct sctp_tcb *
1609 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1610 {
1611 	struct sctp_tcb *stcb;
1612 
1613 	SCTP_INP_RLOCK(inp);
1614 	stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1615 	SCTP_INP_RUNLOCK(inp);
1616 	return (stcb);
1617 }
1618 
1619 
1620 /*
1621  * Endpoint probe expects that the INP_INFO is locked.
1622  */
1623 static struct sctp_inpcb *
1624 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1625     uint16_t lport, uint32_t vrf_id)
1626 {
1627 	struct sctp_inpcb *inp;
1628 	struct sctp_laddr *laddr;
1629 #ifdef INET
1630 	struct sockaddr_in *sin;
1631 #endif
1632 #ifdef INET6
1633 	struct sockaddr_in6 *sin6;
1634 	struct sockaddr_in6 *intf_addr6;
1635 #endif
1636 	int fnd;
1637 
1638 #ifdef INET
1639 	sin = NULL;
1640 #endif
1641 #ifdef INET6
1642 	sin6 = NULL;
1643 #endif
1644 	switch (nam->sa_family) {
1645 #ifdef INET
1646 	case AF_INET:
1647 		sin = (struct sockaddr_in *)nam;
1648 		break;
1649 #endif
1650 #ifdef INET6
1651 	case AF_INET6:
1652 		sin6 = (struct sockaddr_in6 *)nam;
1653 		break;
1654 #endif
1655 	default:
1656 		/* unsupported family */
1657 		return (NULL);
1658 	}
1659 
1660 	if (head == NULL)
1661 		return (NULL);
1662 
1663 	LIST_FOREACH(inp, head, sctp_hash) {
1664 		SCTP_INP_RLOCK(inp);
1665 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1666 			SCTP_INP_RUNLOCK(inp);
1667 			continue;
1668 		}
1669 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1670 		    (inp->sctp_lport == lport)) {
1671 			/* got it */
1672 			switch (nam->sa_family) {
1673 #ifdef INET
1674 			case AF_INET:
1675 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1676 				    SCTP_IPV6_V6ONLY(inp)) {
1677 					/*
1678 					 * IPv4 on a IPv6 socket with ONLY
1679 					 * IPv6 set
1680 					 */
1681 					SCTP_INP_RUNLOCK(inp);
1682 					continue;
1683 				}
1684 				if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1685 				    &sin->sin_addr) != 0) {
1686 					SCTP_INP_RUNLOCK(inp);
1687 					continue;
1688 				}
1689 				break;
1690 #endif
1691 #ifdef INET6
1692 			case AF_INET6:
1693 				/*
1694 				 * A V6 address and the endpoint is NOT
1695 				 * bound V6
1696 				 */
1697 				if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1698 					SCTP_INP_RUNLOCK(inp);
1699 					continue;
1700 				}
1701 				if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1702 				    &sin6->sin6_addr) != 0) {
1703 					SCTP_INP_RUNLOCK(inp);
1704 					continue;
1705 				}
1706 				break;
1707 #endif
1708 			default:
1709 				break;
1710 			}
1711 			/* does a VRF id match? */
1712 			fnd = 0;
1713 			if (inp->def_vrf_id == vrf_id)
1714 				fnd = 1;
1715 
1716 			SCTP_INP_RUNLOCK(inp);
1717 			if (!fnd)
1718 				continue;
1719 			return (inp);
1720 		}
1721 		SCTP_INP_RUNLOCK(inp);
1722 	}
1723 	switch (nam->sa_family) {
1724 #ifdef INET
1725 	case AF_INET:
1726 		if (sin->sin_addr.s_addr == INADDR_ANY) {
1727 			/* Can't hunt for one that has no address specified */
1728 			return (NULL);
1729 		}
1730 		break;
1731 #endif
1732 #ifdef INET6
1733 	case AF_INET6:
1734 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1735 			/* Can't hunt for one that has no address specified */
1736 			return (NULL);
1737 		}
1738 		break;
1739 #endif
1740 	default:
1741 		break;
1742 	}
1743 	/*
1744 	 * ok, not bound to all so see if we can find a EP bound to this
1745 	 * address.
1746 	 */
1747 	LIST_FOREACH(inp, head, sctp_hash) {
1748 		SCTP_INP_RLOCK(inp);
1749 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1750 			SCTP_INP_RUNLOCK(inp);
1751 			continue;
1752 		}
1753 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1754 			SCTP_INP_RUNLOCK(inp);
1755 			continue;
1756 		}
1757 		/*
1758 		 * Ok this could be a likely candidate, look at all of its
1759 		 * addresses
1760 		 */
1761 		if (inp->sctp_lport != lport) {
1762 			SCTP_INP_RUNLOCK(inp);
1763 			continue;
1764 		}
1765 		/* does a VRF id match? */
1766 		fnd = 0;
1767 		if (inp->def_vrf_id == vrf_id)
1768 			fnd = 1;
1769 
1770 		if (!fnd) {
1771 			SCTP_INP_RUNLOCK(inp);
1772 			continue;
1773 		}
1774 		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1775 			if (laddr->ifa == NULL) {
1776 				SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1777 				    __func__);
1778 				continue;
1779 			}
1780 			SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1781 			    (void *)laddr->ifa);
1782 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1783 				SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1784 				continue;
1785 			}
1786 			if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1787 				/* possible, see if it matches */
1788 				switch (nam->sa_family) {
1789 #ifdef INET
1790 				case AF_INET:
1791 					if (sin->sin_addr.s_addr ==
1792 					    laddr->ifa->address.sin.sin_addr.s_addr) {
1793 						SCTP_INP_RUNLOCK(inp);
1794 						return (inp);
1795 					}
1796 					break;
1797 #endif
1798 #ifdef INET6
1799 				case AF_INET6:
1800 					intf_addr6 = &laddr->ifa->address.sin6;
1801 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1802 					    intf_addr6)) {
1803 						SCTP_INP_RUNLOCK(inp);
1804 						return (inp);
1805 					}
1806 					break;
1807 #endif
1808 				}
1809 			}
1810 		}
1811 		SCTP_INP_RUNLOCK(inp);
1812 	}
1813 	return (NULL);
1814 }
1815 
1816 
1817 static struct sctp_inpcb *
1818 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1819 {
1820 	struct sctppcbhead *head;
1821 	struct sctp_inpcb *t_inp;
1822 	int fnd;
1823 
1824 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1825 	    SCTP_BASE_INFO(hashmark))];
1826 	LIST_FOREACH(t_inp, head, sctp_hash) {
1827 		if (t_inp->sctp_lport != lport) {
1828 			continue;
1829 		}
1830 		/* is it in the VRF in question */
1831 		fnd = 0;
1832 		if (t_inp->def_vrf_id == vrf_id)
1833 			fnd = 1;
1834 		if (!fnd)
1835 			continue;
1836 
1837 		/* This one is in use. */
1838 		/* check the v6/v4 binding issue */
1839 		if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1840 		    SCTP_IPV6_V6ONLY(t_inp)) {
1841 			if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1842 				/* collision in V6 space */
1843 				return (t_inp);
1844 			} else {
1845 				/* inp is BOUND_V4 no conflict */
1846 				continue;
1847 			}
1848 		} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1849 			/* t_inp is bound v4 and v6, conflict always */
1850 			return (t_inp);
1851 		} else {
1852 			/* t_inp is bound only V4 */
1853 			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1854 			    SCTP_IPV6_V6ONLY(inp)) {
1855 				/* no conflict */
1856 				continue;
1857 			}
1858 			/* else fall through to conflict */
1859 		}
1860 		return (t_inp);
1861 	}
1862 	return (NULL);
1863 }
1864 
1865 
1866 int
1867 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1868 {
1869 	/* For 1-2-1 with port reuse */
1870 	struct sctppcbhead *head;
1871 	struct sctp_inpcb *tinp, *ninp;
1872 
1873 	if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1874 		/* only works with port reuse on */
1875 		return (-1);
1876 	}
1877 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1878 		return (0);
1879 	}
1880 	SCTP_INP_RUNLOCK(inp);
1881 	SCTP_INP_INFO_WLOCK();
1882 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1883 	    SCTP_BASE_INFO(hashmark))];
1884 	/* Kick out all non-listeners to the TCP hash */
1885 	LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1886 		if (tinp->sctp_lport != inp->sctp_lport) {
1887 			continue;
1888 		}
1889 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1890 			continue;
1891 		}
1892 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1893 			continue;
1894 		}
1895 		if (SCTP_IS_LISTENING(tinp)) {
1896 			continue;
1897 		}
1898 		SCTP_INP_WLOCK(tinp);
1899 		LIST_REMOVE(tinp, sctp_hash);
1900 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1901 		tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1902 		LIST_INSERT_HEAD(head, tinp, sctp_hash);
1903 		SCTP_INP_WUNLOCK(tinp);
1904 	}
1905 	SCTP_INP_WLOCK(inp);
1906 	/* Pull from where he was */
1907 	LIST_REMOVE(inp, sctp_hash);
1908 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1909 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1910 	LIST_INSERT_HEAD(head, inp, sctp_hash);
1911 	SCTP_INP_WUNLOCK(inp);
1912 	SCTP_INP_RLOCK(inp);
1913 	SCTP_INP_INFO_WUNLOCK();
1914 	return (0);
1915 }
1916 
1917 
1918 struct sctp_inpcb *
1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1920     uint32_t vrf_id)
1921 {
1922 	/*
1923 	 * First we check the hash table to see if someone has this port
1924 	 * bound with just the port.
1925 	 */
1926 	struct sctp_inpcb *inp;
1927 	struct sctppcbhead *head;
1928 	int lport;
1929 	unsigned int i;
1930 #ifdef INET
1931 	struct sockaddr_in *sin;
1932 #endif
1933 #ifdef INET6
1934 	struct sockaddr_in6 *sin6;
1935 #endif
1936 
1937 	switch (nam->sa_family) {
1938 #ifdef INET
1939 	case AF_INET:
1940 		sin = (struct sockaddr_in *)nam;
1941 		lport = sin->sin_port;
1942 		break;
1943 #endif
1944 #ifdef INET6
1945 	case AF_INET6:
1946 		sin6 = (struct sockaddr_in6 *)nam;
1947 		lport = sin6->sin6_port;
1948 		break;
1949 #endif
1950 	default:
1951 		return (NULL);
1952 	}
1953 	/*
1954 	 * I could cheat here and just cast to one of the types but we will
1955 	 * do it right. It also provides the check against an Unsupported
1956 	 * type too.
1957 	 */
1958 	/* Find the head of the ALLADDR chain */
1959 	if (have_lock == 0) {
1960 		SCTP_INP_INFO_RLOCK();
1961 	}
1962 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1963 	    SCTP_BASE_INFO(hashmark))];
1964 	inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1965 
1966 	/*
1967 	 * If the TCP model exists it could be that the main listening
1968 	 * endpoint is gone but there still exists a connected socket for
1969 	 * this guy. If so we can return the first one that we find. This
1970 	 * may NOT be the correct one so the caller should be wary on the
1971 	 * returned INP. Currently the only caller that sets find_tcp_pool
1972 	 * is in bindx where we are verifying that a user CAN bind the
1973 	 * address. He either has bound it already, or someone else has, or
1974 	 * its open to bind, so this is good enough.
1975 	 */
1976 	if (inp == NULL && find_tcp_pool) {
1977 		for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1978 			head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1979 			inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1980 			if (inp) {
1981 				break;
1982 			}
1983 		}
1984 	}
1985 	if (inp) {
1986 		SCTP_INP_INCR_REF(inp);
1987 	}
1988 	if (have_lock == 0) {
1989 		SCTP_INP_INFO_RUNLOCK();
1990 	}
1991 	return (inp);
1992 }
1993 
1994 
1995 /*
1996  * Find an association for an endpoint with the pointer to whom you want to
1997  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1998  * need to change the *to to some other struct like a mbuf...
1999  */
2000 struct sctp_tcb *
2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2002     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2003     uint32_t vrf_id)
2004 {
2005 	struct sctp_inpcb *inp = NULL;
2006 	struct sctp_tcb *stcb;
2007 
2008 	SCTP_INP_INFO_RLOCK();
2009 	if (find_tcp_pool) {
2010 		if (inp_p != NULL) {
2011 			stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2012 			    vrf_id);
2013 		} else {
2014 			stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2015 			    vrf_id);
2016 		}
2017 		if (stcb != NULL) {
2018 			SCTP_INP_INFO_RUNLOCK();
2019 			return (stcb);
2020 		}
2021 	}
2022 	inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2023 	if (inp_p != NULL) {
2024 		*inp_p = inp;
2025 	}
2026 	SCTP_INP_INFO_RUNLOCK();
2027 	if (inp == NULL) {
2028 		return (NULL);
2029 	}
2030 	/*
2031 	 * ok, we have an endpoint, now lets find the assoc for it (if any)
2032 	 * we now place the source address or from in the to of the find
2033 	 * endpoint call. Since in reality this chain is used from the
2034 	 * inbound packet side.
2035 	 */
2036 	if (inp_p != NULL) {
2037 		stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2038 		    NULL);
2039 	} else {
2040 		stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2041 		    NULL);
2042 	}
2043 	return (stcb);
2044 }
2045 
2046 
2047 /*
2048  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2049  * find all addresses that the sender has specified in any address list. Each
2050  * address will be used to lookup the TCB and see if one exits.
2051  */
2052 static struct sctp_tcb *
2053 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2054     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2055     struct sockaddr *dst)
2056 {
2057 	struct sctp_paramhdr *phdr, param_buf;
2058 #if defined(INET) || defined(INET6)
2059 	struct sctp_tcb *stcb;
2060 	uint16_t ptype;
2061 #endif
2062 	uint16_t plen;
2063 #ifdef INET
2064 	struct sockaddr_in sin4;
2065 #endif
2066 #ifdef INET6
2067 	struct sockaddr_in6 sin6;
2068 #endif
2069 
2070 #ifdef INET
2071 	memset(&sin4, 0, sizeof(sin4));
2072 	sin4.sin_len = sizeof(sin4);
2073 	sin4.sin_family = AF_INET;
2074 	sin4.sin_port = sh->src_port;
2075 #endif
2076 #ifdef INET6
2077 	memset(&sin6, 0, sizeof(sin6));
2078 	sin6.sin6_len = sizeof(sin6);
2079 	sin6.sin6_family = AF_INET6;
2080 	sin6.sin6_port = sh->src_port;
2081 #endif
2082 
2083 	offset += sizeof(struct sctp_init_chunk);
2084 
2085 	phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2086 	while (phdr != NULL) {
2087 		/* now we must see if we want the parameter */
2088 #if defined(INET) || defined(INET6)
2089 		ptype = ntohs(phdr->param_type);
2090 #endif
2091 		plen = ntohs(phdr->param_length);
2092 		if (plen == 0) {
2093 			break;
2094 		}
2095 #ifdef INET
2096 		if (ptype == SCTP_IPV4_ADDRESS &&
2097 		    plen == sizeof(struct sctp_ipv4addr_param)) {
2098 			/* Get the rest of the address */
2099 			struct sctp_ipv4addr_param ip4_param, *p4;
2100 
2101 			phdr = sctp_get_next_param(m, offset,
2102 			    (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2103 			if (phdr == NULL) {
2104 				return (NULL);
2105 			}
2106 			p4 = (struct sctp_ipv4addr_param *)phdr;
2107 			memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2108 			/* look it up */
2109 			stcb = sctp_findassociation_ep_addr(inp_p,
2110 			    (struct sockaddr *)&sin4, netp, dst, NULL);
2111 			if (stcb != NULL) {
2112 				return (stcb);
2113 			}
2114 		}
2115 #endif
2116 #ifdef INET6
2117 		if (ptype == SCTP_IPV6_ADDRESS &&
2118 		    plen == sizeof(struct sctp_ipv6addr_param)) {
2119 			/* Get the rest of the address */
2120 			struct sctp_ipv6addr_param ip6_param, *p6;
2121 
2122 			phdr = sctp_get_next_param(m, offset,
2123 			    (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2124 			if (phdr == NULL) {
2125 				return (NULL);
2126 			}
2127 			p6 = (struct sctp_ipv6addr_param *)phdr;
2128 			memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2129 			/* look it up */
2130 			stcb = sctp_findassociation_ep_addr(inp_p,
2131 			    (struct sockaddr *)&sin6, netp, dst, NULL);
2132 			if (stcb != NULL) {
2133 				return (stcb);
2134 			}
2135 		}
2136 #endif
2137 		offset += SCTP_SIZE32(plen);
2138 		phdr = sctp_get_next_param(m, offset, &param_buf,
2139 		    sizeof(param_buf));
2140 	}
2141 	return (NULL);
2142 }
2143 
2144 static struct sctp_tcb *
2145 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2146     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2147     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2148 {
2149 	/*
2150 	 * Use my vtag to hash. If we find it we then verify the source addr
2151 	 * is in the assoc. If all goes well we save a bit on rec of a
2152 	 * packet.
2153 	 */
2154 	struct sctpasochead *head;
2155 	struct sctp_nets *net;
2156 	struct sctp_tcb *stcb;
2157 
2158 	SCTP_INP_INFO_RLOCK();
2159 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2160 	    SCTP_BASE_INFO(hashasocmark))];
2161 	LIST_FOREACH(stcb, head, sctp_asocs) {
2162 		SCTP_INP_RLOCK(stcb->sctp_ep);
2163 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2164 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2165 			continue;
2166 		}
2167 		if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2168 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2169 			continue;
2170 		}
2171 		SCTP_TCB_LOCK(stcb);
2172 		SCTP_INP_RUNLOCK(stcb->sctp_ep);
2173 		if (stcb->asoc.my_vtag == vtag) {
2174 			/* candidate */
2175 			if (stcb->rport != rport) {
2176 				SCTP_TCB_UNLOCK(stcb);
2177 				continue;
2178 			}
2179 			if (stcb->sctp_ep->sctp_lport != lport) {
2180 				SCTP_TCB_UNLOCK(stcb);
2181 				continue;
2182 			}
2183 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2184 				SCTP_TCB_UNLOCK(stcb);
2185 				continue;
2186 			}
2187 			/* RRS:Need toaddr check here */
2188 			if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2189 				/* Endpoint does not own this address */
2190 				SCTP_TCB_UNLOCK(stcb);
2191 				continue;
2192 			}
2193 			if (remote_tag) {
2194 				/*
2195 				 * If we have both vtags that's all we match
2196 				 * on
2197 				 */
2198 				if (stcb->asoc.peer_vtag == remote_tag) {
2199 					/*
2200 					 * If both tags match we consider it
2201 					 * conclusive and check NO
2202 					 * source/destination addresses
2203 					 */
2204 					goto conclusive;
2205 				}
2206 			}
2207 			if (skip_src_check) {
2208 		conclusive:
2209 				if (from) {
2210 					*netp = sctp_findnet(stcb, from);
2211 				} else {
2212 					*netp = NULL;	/* unknown */
2213 				}
2214 				if (inp_p)
2215 					*inp_p = stcb->sctp_ep;
2216 				SCTP_INP_INFO_RUNLOCK();
2217 				return (stcb);
2218 			}
2219 			net = sctp_findnet(stcb, from);
2220 			if (net) {
2221 				/* yep its him. */
2222 				*netp = net;
2223 				SCTP_STAT_INCR(sctps_vtagexpress);
2224 				*inp_p = stcb->sctp_ep;
2225 				SCTP_INP_INFO_RUNLOCK();
2226 				return (stcb);
2227 			} else {
2228 				/*
2229 				 * not him, this should only happen in rare
2230 				 * cases so I peg it.
2231 				 */
2232 				SCTP_STAT_INCR(sctps_vtagbogus);
2233 			}
2234 		}
2235 		SCTP_TCB_UNLOCK(stcb);
2236 	}
2237 	SCTP_INP_INFO_RUNLOCK();
2238 	return (NULL);
2239 }
2240 
2241 
2242 /*
2243  * Find an association with the pointer to the inbound IP packet. This can be
2244  * a IPv4 or IPv6 packet.
2245  */
2246 struct sctp_tcb *
2247 sctp_findassociation_addr(struct mbuf *m, int offset,
2248     struct sockaddr *src, struct sockaddr *dst,
2249     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2250     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2251 {
2252 	struct sctp_tcb *stcb;
2253 	struct sctp_inpcb *inp;
2254 
2255 	if (sh->v_tag) {
2256 		/* we only go down this path if vtag is non-zero */
2257 		stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2258 		    inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2259 		if (stcb) {
2260 			return (stcb);
2261 		}
2262 	}
2263 
2264 	if (inp_p) {
2265 		stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2266 		    1, vrf_id);
2267 		inp = *inp_p;
2268 	} else {
2269 		stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2270 		    1, vrf_id);
2271 	}
2272 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2273 	if (stcb == NULL && inp) {
2274 		/* Found a EP but not this address */
2275 		if ((ch->chunk_type == SCTP_INITIATION) ||
2276 		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
2277 			/*-
2278 			 * special hook, we do NOT return linp or an
2279 			 * association that is linked to an existing
2280 			 * association that is under the TCP pool (i.e. no
2281 			 * listener exists). The endpoint finding routine
2282 			 * will always find a listener before examining the
2283 			 * TCP pool.
2284 			 */
2285 			if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2286 				if (inp_p) {
2287 					*inp_p = NULL;
2288 				}
2289 				return (NULL);
2290 			}
2291 			stcb = sctp_findassociation_special_addr(m,
2292 			    offset, sh, &inp, netp, dst);
2293 			if (inp_p != NULL) {
2294 				*inp_p = inp;
2295 			}
2296 		}
2297 	}
2298 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2299 	return (stcb);
2300 }
2301 
2302 /*
2303  * lookup an association by an ASCONF lookup address.
2304  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2305  */
2306 struct sctp_tcb *
2307 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2308     struct sockaddr *dst, struct sctphdr *sh,
2309     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2310 {
2311 	struct sctp_tcb *stcb;
2312 	union sctp_sockstore remote_store;
2313 	struct sctp_paramhdr param_buf, *phdr;
2314 	int ptype;
2315 	int zero_address = 0;
2316 #ifdef INET
2317 	struct sockaddr_in *sin;
2318 #endif
2319 #ifdef INET6
2320 	struct sockaddr_in6 *sin6;
2321 #endif
2322 
2323 	memset(&remote_store, 0, sizeof(remote_store));
2324 	phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2325 	    &param_buf, sizeof(struct sctp_paramhdr));
2326 	if (phdr == NULL) {
2327 		SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2328 		    __func__);
2329 		return NULL;
2330 	}
2331 	ptype = (int)((uint32_t)ntohs(phdr->param_type));
2332 	/* get the correlation address */
2333 	switch (ptype) {
2334 #ifdef INET6
2335 	case SCTP_IPV6_ADDRESS:
2336 		{
2337 			/* ipv6 address param */
2338 			struct sctp_ipv6addr_param *p6, p6_buf;
2339 
2340 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2341 				return NULL;
2342 			}
2343 			p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2344 			    offset + sizeof(struct sctp_asconf_chunk),
2345 			    &p6_buf.ph, sizeof(p6_buf));
2346 			if (p6 == NULL) {
2347 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2348 				    __func__);
2349 				return (NULL);
2350 			}
2351 			sin6 = &remote_store.sin6;
2352 			sin6->sin6_family = AF_INET6;
2353 			sin6->sin6_len = sizeof(*sin6);
2354 			sin6->sin6_port = sh->src_port;
2355 			memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2356 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2357 				zero_address = 1;
2358 			break;
2359 		}
2360 #endif
2361 #ifdef INET
2362 	case SCTP_IPV4_ADDRESS:
2363 		{
2364 			/* ipv4 address param */
2365 			struct sctp_ipv4addr_param *p4, p4_buf;
2366 
2367 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2368 				return NULL;
2369 			}
2370 			p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2371 			    offset + sizeof(struct sctp_asconf_chunk),
2372 			    &p4_buf.ph, sizeof(p4_buf));
2373 			if (p4 == NULL) {
2374 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2375 				    __func__);
2376 				return (NULL);
2377 			}
2378 			sin = &remote_store.sin;
2379 			sin->sin_family = AF_INET;
2380 			sin->sin_len = sizeof(*sin);
2381 			sin->sin_port = sh->src_port;
2382 			memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2383 			if (sin->sin_addr.s_addr == INADDR_ANY)
2384 				zero_address = 1;
2385 			break;
2386 		}
2387 #endif
2388 	default:
2389 		/* invalid address param type */
2390 		return NULL;
2391 	}
2392 
2393 	if (zero_address) {
2394 		stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2395 		    netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2396 		if (stcb != NULL) {
2397 			SCTP_INP_DECR_REF(*inp_p);
2398 		}
2399 	} else {
2400 		stcb = sctp_findassociation_ep_addr(inp_p,
2401 		    &remote_store.sa, netp,
2402 		    dst, NULL);
2403 	}
2404 	return (stcb);
2405 }
2406 
2407 
2408 /*
2409  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2410  * addresses. This way if we don't get a bind we by default pick a ephemeral
2411  * port with all addresses bound.
2412  */
2413 int
2414 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2415 {
2416 	/*
2417 	 * we get called when a new endpoint starts up. We need to allocate
2418 	 * the sctp_inpcb structure from the zone and init it. Mark it as
2419 	 * unbound and find a port that we can use as an ephemeral with
2420 	 * INADDR_ANY. If the user binds later no problem we can then add in
2421 	 * the specific addresses. And setup the default parameters for the
2422 	 * EP.
2423 	 */
2424 	int i, error;
2425 	struct sctp_inpcb *inp;
2426 	struct sctp_pcb *m;
2427 	struct timeval time;
2428 	sctp_sharedkey_t *null_key;
2429 
2430 	error = 0;
2431 
2432 	SCTP_INP_INFO_WLOCK();
2433 	inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2434 	if (inp == NULL) {
2435 		SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2436 		SCTP_INP_INFO_WUNLOCK();
2437 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2438 		return (ENOBUFS);
2439 	}
2440 	/* zap it */
2441 	memset(inp, 0, sizeof(*inp));
2442 
2443 	/* bump generations */
2444 	/* setup socket pointers */
2445 	inp->sctp_socket = so;
2446 	inp->ip_inp.inp.inp_socket = so;
2447 	inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2448 #ifdef INET6
2449 	if (INP_SOCKAF(so) == AF_INET6) {
2450 		if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2451 			inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2452 		}
2453 		if (MODULE_GLOBAL(ip6_v6only)) {
2454 			inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2455 		}
2456 	}
2457 #endif
2458 	inp->sctp_associd_counter = 1;
2459 	inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2460 	inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2461 	inp->max_cwnd = 0;
2462 	inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2463 	inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2464 	inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2465 	inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2466 	inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2467 	inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2468 	inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2469 	inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2470 	inp->idata_supported = 0;
2471 
2472 	inp->fibnum = so->so_fibnum;
2473 	/* init the small hash table we use to track asocid <-> tcb */
2474 	inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2475 	if (inp->sctp_asocidhash == NULL) {
2476 		crfree(inp->ip_inp.inp.inp_cred);
2477 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2478 		SCTP_INP_INFO_WUNLOCK();
2479 		return (ENOBUFS);
2480 	}
2481 	SCTP_INCR_EP_COUNT();
2482 	inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2483 	SCTP_INP_INFO_WUNLOCK();
2484 
2485 	so->so_pcb = (caddr_t)inp;
2486 
2487 	if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2488 		/* UDP style socket */
2489 		inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2490 		    SCTP_PCB_FLAGS_UNBOUND);
2491 		/* Be sure it is NON-BLOCKING IO for UDP */
2492 		/* SCTP_SET_SO_NBIO(so); */
2493 	} else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2494 		/* TCP style socket */
2495 		inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2496 		    SCTP_PCB_FLAGS_UNBOUND);
2497 		/* Be sure we have blocking IO by default */
2498 		SOCK_LOCK(so);
2499 		SCTP_CLEAR_SO_NBIO(so);
2500 		SOCK_UNLOCK(so);
2501 	} else {
2502 		/*
2503 		 * unsupported socket type (RAW, etc)- in case we missed it
2504 		 * in protosw
2505 		 */
2506 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2507 		so->so_pcb = NULL;
2508 		crfree(inp->ip_inp.inp.inp_cred);
2509 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2510 		return (EOPNOTSUPP);
2511 	}
2512 	if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2513 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2514 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2515 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2516 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2517 		sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2518 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2519 		sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2520 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2521 	}
2522 	inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2523 	    &inp->sctp_hashmark);
2524 	if (inp->sctp_tcbhash == NULL) {
2525 		SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2526 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2527 		so->so_pcb = NULL;
2528 		crfree(inp->ip_inp.inp.inp_cred);
2529 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2530 		return (ENOBUFS);
2531 	}
2532 	inp->def_vrf_id = vrf_id;
2533 
2534 	SCTP_INP_INFO_WLOCK();
2535 	SCTP_INP_LOCK_INIT(inp);
2536 	INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2537 	SCTP_INP_READ_INIT(inp);
2538 	SCTP_ASOC_CREATE_LOCK_INIT(inp);
2539 	/* lock the new ep */
2540 	SCTP_INP_WLOCK(inp);
2541 
2542 	/* add it to the info area */
2543 	LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2544 	SCTP_INP_INFO_WUNLOCK();
2545 
2546 	TAILQ_INIT(&inp->read_queue);
2547 	LIST_INIT(&inp->sctp_addr_list);
2548 
2549 	LIST_INIT(&inp->sctp_asoc_list);
2550 
2551 #ifdef SCTP_TRACK_FREED_ASOCS
2552 	/* TEMP CODE */
2553 	LIST_INIT(&inp->sctp_asoc_free_list);
2554 #endif
2555 	/* Init the timer structure for signature change */
2556 	SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2557 	inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2558 
2559 	/* now init the actual endpoint default data */
2560 	m = &inp->sctp_ep;
2561 
2562 	/* setup the base timeout information */
2563 	m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC);	/* needed ? */
2564 	m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC);	/* needed ? */
2565 	m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2566 	m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2567 	m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2568 	m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2569 	m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2570 	/* all max/min max are in ms */
2571 	m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2572 	m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2573 	m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2574 	m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2575 	m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2576 	m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2577 	m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2578 	m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2579 	m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2580 	m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2581 	m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2582 	m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2583 	m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2584 
2585 	m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2586 	m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2587 	m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2588 	/* number of streams to pre-open on a association */
2589 	m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2590 
2591 	m->default_mtu = 0;
2592 	/* Add adaptation cookie */
2593 	m->adaptation_layer_indicator = 0;
2594 	m->adaptation_layer_indicator_provided = 0;
2595 
2596 	/* seed random number generator */
2597 	m->random_counter = 1;
2598 	m->store_at = SCTP_SIGNATURE_SIZE;
2599 	SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2600 	sctp_fill_random_store(m);
2601 
2602 	/* Minimum cookie size */
2603 	m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2604 	    sizeof(struct sctp_state_cookie);
2605 	m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2606 
2607 	/* Setup the initial secret */
2608 	(void)SCTP_GETTIME_TIMEVAL(&time);
2609 	m->time_of_secret_change = time.tv_sec;
2610 
2611 	for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2612 		m->secret_key[0][i] = sctp_select_initial_TSN(m);
2613 	}
2614 	sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2615 
2616 	/* How long is a cookie good for ? */
2617 	m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2618 	/*
2619 	 * Initialize authentication parameters
2620 	 */
2621 	m->local_hmacs = sctp_default_supported_hmaclist();
2622 	m->local_auth_chunks = sctp_alloc_chunklist();
2623 	if (inp->asconf_supported) {
2624 		sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2625 		sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2626 	}
2627 	m->default_dscp = 0;
2628 #ifdef INET6
2629 	m->default_flowlabel = 0;
2630 #endif
2631 	m->port = 0;		/* encapsulation disabled by default */
2632 	LIST_INIT(&m->shared_keys);
2633 	/* add default NULL key as key id 0 */
2634 	null_key = sctp_alloc_sharedkey();
2635 	sctp_insert_sharedkey(&m->shared_keys, null_key);
2636 	SCTP_INP_WUNLOCK(inp);
2637 #ifdef SCTP_LOG_CLOSING
2638 	sctp_log_closing(inp, NULL, 12);
2639 #endif
2640 	return (error);
2641 }
2642 
2643 
2644 void
2645 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2646     struct sctp_tcb *stcb)
2647 {
2648 	struct sctp_nets *net;
2649 	uint16_t lport, rport;
2650 	struct sctppcbhead *head;
2651 	struct sctp_laddr *laddr, *oladdr;
2652 
2653 	atomic_add_int(&stcb->asoc.refcnt, 1);
2654 	SCTP_TCB_UNLOCK(stcb);
2655 	SCTP_INP_INFO_WLOCK();
2656 	SCTP_INP_WLOCK(old_inp);
2657 	SCTP_INP_WLOCK(new_inp);
2658 	SCTP_TCB_LOCK(stcb);
2659 	atomic_subtract_int(&stcb->asoc.refcnt, 1);
2660 
2661 	new_inp->sctp_ep.time_of_secret_change =
2662 	    old_inp->sctp_ep.time_of_secret_change;
2663 	memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2664 	    sizeof(old_inp->sctp_ep.secret_key));
2665 	new_inp->sctp_ep.current_secret_number =
2666 	    old_inp->sctp_ep.current_secret_number;
2667 	new_inp->sctp_ep.last_secret_number =
2668 	    old_inp->sctp_ep.last_secret_number;
2669 	new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2670 
2671 	/* make it so new data pours into the new socket */
2672 	stcb->sctp_socket = new_inp->sctp_socket;
2673 	stcb->sctp_ep = new_inp;
2674 
2675 	/* Copy the port across */
2676 	lport = new_inp->sctp_lport = old_inp->sctp_lport;
2677 	rport = stcb->rport;
2678 	/* Pull the tcb from the old association */
2679 	LIST_REMOVE(stcb, sctp_tcbhash);
2680 	LIST_REMOVE(stcb, sctp_tcblist);
2681 	if (stcb->asoc.in_asocid_hash) {
2682 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
2683 	}
2684 	/* Now insert the new_inp into the TCP connected hash */
2685 	head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2686 
2687 	LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2688 	/* Its safe to access */
2689 	new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2690 
2691 	/* Now move the tcb into the endpoint list */
2692 	LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2693 	/*
2694 	 * Question, do we even need to worry about the ep-hash since we
2695 	 * only have one connection? Probably not :> so lets get rid of it
2696 	 * and not suck up any kernel memory in that.
2697 	 */
2698 	if (stcb->asoc.in_asocid_hash) {
2699 		struct sctpasochead *lhd;
2700 
2701 		lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2702 		    new_inp->hashasocidmark)];
2703 		LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2704 	}
2705 	/* Ok. Let's restart timer. */
2706 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2707 		sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2708 		    stcb, net);
2709 	}
2710 
2711 	SCTP_INP_INFO_WUNLOCK();
2712 	if (new_inp->sctp_tcbhash != NULL) {
2713 		SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2714 		new_inp->sctp_tcbhash = NULL;
2715 	}
2716 	if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2717 		/* Subset bound, so copy in the laddr list from the old_inp */
2718 		LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2719 			laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2720 			if (laddr == NULL) {
2721 				/*
2722 				 * Gak, what can we do? This assoc is really
2723 				 * HOSED. We probably should send an abort
2724 				 * here.
2725 				 */
2726 				SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2727 				continue;
2728 			}
2729 			SCTP_INCR_LADDR_COUNT();
2730 			memset(laddr, 0, sizeof(*laddr));
2731 			(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2732 			laddr->ifa = oladdr->ifa;
2733 			atomic_add_int(&laddr->ifa->refcount, 1);
2734 			LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2735 			    sctp_nxt_addr);
2736 			new_inp->laddr_count++;
2737 			if (oladdr == stcb->asoc.last_used_address) {
2738 				stcb->asoc.last_used_address = laddr;
2739 			}
2740 		}
2741 	}
2742 	/* Now any running timers need to be adjusted. */
2743 	if (stcb->asoc.dack_timer.ep == old_inp) {
2744 		SCTP_INP_DECR_REF(old_inp);
2745 		stcb->asoc.dack_timer.ep = new_inp;
2746 		SCTP_INP_INCR_REF(new_inp);
2747 	}
2748 	if (stcb->asoc.asconf_timer.ep == old_inp) {
2749 		SCTP_INP_DECR_REF(old_inp);
2750 		stcb->asoc.asconf_timer.ep = new_inp;
2751 		SCTP_INP_INCR_REF(new_inp);
2752 	}
2753 	if (stcb->asoc.strreset_timer.ep == old_inp) {
2754 		SCTP_INP_DECR_REF(old_inp);
2755 		stcb->asoc.strreset_timer.ep = new_inp;
2756 		SCTP_INP_INCR_REF(new_inp);
2757 	}
2758 	if (stcb->asoc.shut_guard_timer.ep == old_inp) {
2759 		SCTP_INP_DECR_REF(old_inp);
2760 		stcb->asoc.shut_guard_timer.ep = new_inp;
2761 		SCTP_INP_INCR_REF(new_inp);
2762 	}
2763 	if (stcb->asoc.autoclose_timer.ep == old_inp) {
2764 		SCTP_INP_DECR_REF(old_inp);
2765 		stcb->asoc.autoclose_timer.ep = new_inp;
2766 		SCTP_INP_INCR_REF(new_inp);
2767 	}
2768 	if (stcb->asoc.delete_prim_timer.ep == old_inp) {
2769 		SCTP_INP_DECR_REF(old_inp);
2770 		stcb->asoc.delete_prim_timer.ep = new_inp;
2771 		SCTP_INP_INCR_REF(new_inp);
2772 	}
2773 	/* now what about the nets? */
2774 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2775 		if (net->pmtu_timer.ep == old_inp) {
2776 			SCTP_INP_DECR_REF(old_inp);
2777 			net->pmtu_timer.ep = new_inp;
2778 			SCTP_INP_INCR_REF(new_inp);
2779 		}
2780 		if (net->hb_timer.ep == old_inp) {
2781 			SCTP_INP_DECR_REF(old_inp);
2782 			net->hb_timer.ep = new_inp;
2783 			SCTP_INP_INCR_REF(new_inp);
2784 		}
2785 		if (net->rxt_timer.ep == old_inp) {
2786 			SCTP_INP_DECR_REF(old_inp);
2787 			net->rxt_timer.ep = new_inp;
2788 			SCTP_INP_INCR_REF(new_inp);
2789 		}
2790 	}
2791 	SCTP_INP_WUNLOCK(new_inp);
2792 	SCTP_INP_WUNLOCK(old_inp);
2793 }
2794 
2795 /*
2796  * insert an laddr entry with the given ifa for the desired list
2797  */
2798 static int
2799 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2800 {
2801 	struct sctp_laddr *laddr;
2802 
2803 	laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2804 	if (laddr == NULL) {
2805 		/* out of memory? */
2806 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2807 		return (EINVAL);
2808 	}
2809 	SCTP_INCR_LADDR_COUNT();
2810 	memset(laddr, 0, sizeof(*laddr));
2811 	(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2812 	laddr->ifa = ifa;
2813 	laddr->action = act;
2814 	atomic_add_int(&ifa->refcount, 1);
2815 	/* insert it */
2816 	LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2817 
2818 	return (0);
2819 }
2820 
2821 /*
2822  * Remove an laddr entry from the local address list (on an assoc)
2823  */
2824 static void
2825 sctp_remove_laddr(struct sctp_laddr *laddr)
2826 {
2827 
2828 	/* remove from the list */
2829 	LIST_REMOVE(laddr, sctp_nxt_addr);
2830 	sctp_free_ifa(laddr->ifa);
2831 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2832 	SCTP_DECR_LADDR_COUNT();
2833 }
2834 
2835 
2836 
2837 /* sctp_ifap is used to bypass normal local address validation checks */
2838 int
2839 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2840     struct sctp_ifa *sctp_ifap, struct thread *p)
2841 {
2842 	/* bind a ep to a socket address */
2843 	struct sctppcbhead *head;
2844 	struct sctp_inpcb *inp, *inp_tmp;
2845 	struct inpcb *ip_inp;
2846 	int port_reuse_active = 0;
2847 	int bindall;
2848 	uint16_t lport;
2849 	int error;
2850 	uint32_t vrf_id;
2851 
2852 	lport = 0;
2853 	bindall = 1;
2854 	inp = (struct sctp_inpcb *)so->so_pcb;
2855 	ip_inp = (struct inpcb *)so->so_pcb;
2856 #ifdef SCTP_DEBUG
2857 	if (addr) {
2858 		SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2859 		    ntohs(((struct sockaddr_in *)addr)->sin_port));
2860 		SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2861 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2862 	}
2863 #endif
2864 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2865 		/* already did a bind, subsequent binds NOT allowed ! */
2866 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2867 		return (EINVAL);
2868 	}
2869 #ifdef INVARIANTS
2870 	if (p == NULL)
2871 		panic("null proc/thread");
2872 #endif
2873 	if (addr != NULL) {
2874 		switch (addr->sa_family) {
2875 #ifdef INET
2876 		case AF_INET:
2877 			{
2878 				struct sockaddr_in *sin;
2879 
2880 				/* IPV6_V6ONLY socket? */
2881 				if (SCTP_IPV6_V6ONLY(inp)) {
2882 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2883 					return (EINVAL);
2884 				}
2885 				if (addr->sa_len != sizeof(*sin)) {
2886 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887 					return (EINVAL);
2888 				}
2889 
2890 				sin = (struct sockaddr_in *)addr;
2891 				lport = sin->sin_port;
2892 				/*
2893 				 * For LOOPBACK the prison_local_ip4() call
2894 				 * will transmute the ip address to the
2895 				 * proper value.
2896 				 */
2897 				if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2898 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2899 					return (error);
2900 				}
2901 				if (sin->sin_addr.s_addr != INADDR_ANY) {
2902 					bindall = 0;
2903 				}
2904 				break;
2905 			}
2906 #endif
2907 #ifdef INET6
2908 		case AF_INET6:
2909 			{
2910 				/*
2911 				 * Only for pure IPv6 Address. (No IPv4
2912 				 * Mapped!)
2913 				 */
2914 				struct sockaddr_in6 *sin6;
2915 
2916 				sin6 = (struct sockaddr_in6 *)addr;
2917 
2918 				if (addr->sa_len != sizeof(*sin6)) {
2919 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2920 					return (EINVAL);
2921 				}
2922 				lport = sin6->sin6_port;
2923 				/*
2924 				 * For LOOPBACK the prison_local_ip6() call
2925 				 * will transmute the ipv6 address to the
2926 				 * proper value.
2927 				 */
2928 				if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2929 				    (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2930 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2931 					return (error);
2932 				}
2933 				if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2934 					bindall = 0;
2935 					/* KAME hack: embed scopeid */
2936 					if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2937 						SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2938 						return (EINVAL);
2939 					}
2940 				}
2941 				/* this must be cleared for ifa_ifwithaddr() */
2942 				sin6->sin6_scope_id = 0;
2943 				break;
2944 			}
2945 #endif
2946 		default:
2947 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2948 			return (EAFNOSUPPORT);
2949 		}
2950 	}
2951 	SCTP_INP_INFO_WLOCK();
2952 	SCTP_INP_WLOCK(inp);
2953 	/* Setup a vrf_id to be the default for the non-bind-all case. */
2954 	vrf_id = inp->def_vrf_id;
2955 
2956 	/* increase our count due to the unlock we do */
2957 	SCTP_INP_INCR_REF(inp);
2958 	if (lport) {
2959 		/*
2960 		 * Did the caller specify a port? if so we must see if an ep
2961 		 * already has this one bound.
2962 		 */
2963 		/* got to be root to get at low ports */
2964 		if (ntohs(lport) < IPPORT_RESERVED) {
2965 			if ((p != NULL) && ((error =
2966 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
2967 			    ) != 0)) {
2968 				SCTP_INP_DECR_REF(inp);
2969 				SCTP_INP_WUNLOCK(inp);
2970 				SCTP_INP_INFO_WUNLOCK();
2971 				return (error);
2972 			}
2973 		}
2974 		SCTP_INP_WUNLOCK(inp);
2975 		if (bindall) {
2976 			vrf_id = inp->def_vrf_id;
2977 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2978 			if (inp_tmp != NULL) {
2979 				/*
2980 				 * lock guy returned and lower count note
2981 				 * that we are not bound so inp_tmp should
2982 				 * NEVER be inp. And it is this inp
2983 				 * (inp_tmp) that gets the reference bump,
2984 				 * so we must lower it.
2985 				 */
2986 				SCTP_INP_DECR_REF(inp_tmp);
2987 				/* unlock info */
2988 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2989 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2990 					/*
2991 					 * Ok, must be one-2-one and
2992 					 * allowing port re-use
2993 					 */
2994 					port_reuse_active = 1;
2995 					goto continue_anyway;
2996 				}
2997 				SCTP_INP_DECR_REF(inp);
2998 				SCTP_INP_INFO_WUNLOCK();
2999 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3000 				return (EADDRINUSE);
3001 			}
3002 		} else {
3003 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
3004 			if (inp_tmp != NULL) {
3005 				/*
3006 				 * lock guy returned and lower count note
3007 				 * that we are not bound so inp_tmp should
3008 				 * NEVER be inp. And it is this inp
3009 				 * (inp_tmp) that gets the reference bump,
3010 				 * so we must lower it.
3011 				 */
3012 				SCTP_INP_DECR_REF(inp_tmp);
3013 				/* unlock info */
3014 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3015 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3016 					/*
3017 					 * Ok, must be one-2-one and
3018 					 * allowing port re-use
3019 					 */
3020 					port_reuse_active = 1;
3021 					goto continue_anyway;
3022 				}
3023 				SCTP_INP_DECR_REF(inp);
3024 				SCTP_INP_INFO_WUNLOCK();
3025 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3026 				return (EADDRINUSE);
3027 			}
3028 		}
3029 continue_anyway:
3030 		SCTP_INP_WLOCK(inp);
3031 		if (bindall) {
3032 			/* verify that no lport is not used by a singleton */
3033 			if ((port_reuse_active == 0) &&
3034 			    (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3035 				/* Sorry someone already has this one bound */
3036 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3037 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3038 					port_reuse_active = 1;
3039 				} else {
3040 					SCTP_INP_DECR_REF(inp);
3041 					SCTP_INP_WUNLOCK(inp);
3042 					SCTP_INP_INFO_WUNLOCK();
3043 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3044 					return (EADDRINUSE);
3045 				}
3046 			}
3047 		}
3048 	} else {
3049 		uint16_t first, last, candidate;
3050 		uint16_t count;
3051 		int done;
3052 
3053 		if (ip_inp->inp_flags & INP_HIGHPORT) {
3054 			first = MODULE_GLOBAL(ipport_hifirstauto);
3055 			last = MODULE_GLOBAL(ipport_hilastauto);
3056 		} else if (ip_inp->inp_flags & INP_LOWPORT) {
3057 			if (p && (error =
3058 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
3059 			    )) {
3060 				SCTP_INP_DECR_REF(inp);
3061 				SCTP_INP_WUNLOCK(inp);
3062 				SCTP_INP_INFO_WUNLOCK();
3063 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3064 				return (error);
3065 			}
3066 			first = MODULE_GLOBAL(ipport_lowfirstauto);
3067 			last = MODULE_GLOBAL(ipport_lowlastauto);
3068 		} else {
3069 			first = MODULE_GLOBAL(ipport_firstauto);
3070 			last = MODULE_GLOBAL(ipport_lastauto);
3071 		}
3072 		if (first > last) {
3073 			uint16_t temp;
3074 
3075 			temp = first;
3076 			first = last;
3077 			last = temp;
3078 		}
3079 		count = last - first + 1;	/* number of candidates */
3080 		candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3081 
3082 		done = 0;
3083 		while (!done) {
3084 			if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3085 				done = 1;
3086 			}
3087 			if (!done) {
3088 				if (--count == 0) {
3089 					SCTP_INP_DECR_REF(inp);
3090 					SCTP_INP_WUNLOCK(inp);
3091 					SCTP_INP_INFO_WUNLOCK();
3092 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3093 					return (EADDRINUSE);
3094 				}
3095 				if (candidate == last)
3096 					candidate = first;
3097 				else
3098 					candidate = candidate + 1;
3099 			}
3100 		}
3101 		lport = htons(candidate);
3102 	}
3103 	SCTP_INP_DECR_REF(inp);
3104 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3105 	    SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3106 		/*
3107 		 * this really should not happen. The guy did a non-blocking
3108 		 * bind and then did a close at the same time.
3109 		 */
3110 		SCTP_INP_WUNLOCK(inp);
3111 		SCTP_INP_INFO_WUNLOCK();
3112 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3113 		return (EINVAL);
3114 	}
3115 	/* ok we look clear to give out this port, so lets setup the binding */
3116 	if (bindall) {
3117 		/* binding to all addresses, so just set in the proper flags */
3118 		inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3119 		/* set the automatic addr changes from kernel flag */
3120 		if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3121 			sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3122 			sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3123 		} else {
3124 			sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3125 			sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3126 		}
3127 		if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3128 			sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3129 		} else {
3130 			sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3131 		}
3132 		/*
3133 		 * set the automatic mobility_base from kernel flag (by
3134 		 * micchie)
3135 		 */
3136 		if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3137 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3138 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3139 		} else {
3140 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3141 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3142 		}
3143 		/*
3144 		 * set the automatic mobility_fasthandoff from kernel flag
3145 		 * (by micchie)
3146 		 */
3147 		if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3148 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3149 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3150 		} else {
3151 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3152 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3153 		}
3154 	} else {
3155 		/*
3156 		 * bind specific, make sure flags is off and add a new
3157 		 * address structure to the sctp_addr_list inside the ep
3158 		 * structure.
3159 		 *
3160 		 * We will need to allocate one and insert it at the head.
3161 		 * The socketopt call can just insert new addresses in there
3162 		 * as well. It will also have to do the embed scope kame
3163 		 * hack too (before adding).
3164 		 */
3165 		struct sctp_ifa *ifa;
3166 		union sctp_sockstore store;
3167 
3168 		memset(&store, 0, sizeof(store));
3169 		switch (addr->sa_family) {
3170 #ifdef INET
3171 		case AF_INET:
3172 			memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3173 			store.sin.sin_port = 0;
3174 			break;
3175 #endif
3176 #ifdef INET6
3177 		case AF_INET6:
3178 			memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3179 			store.sin6.sin6_port = 0;
3180 			break;
3181 #endif
3182 		default:
3183 			break;
3184 		}
3185 		/*
3186 		 * first find the interface with the bound address need to
3187 		 * zero out the port to find the address! yuck! can't do
3188 		 * this earlier since need port for sctp_pcb_findep()
3189 		 */
3190 		if (sctp_ifap != NULL) {
3191 			ifa = sctp_ifap;
3192 		} else {
3193 			/*
3194 			 * Note for BSD we hit here always other O/S's will
3195 			 * pass things in via the sctp_ifap argument.
3196 			 */
3197 			ifa = sctp_find_ifa_by_addr(&store.sa,
3198 			    vrf_id, SCTP_ADDR_NOT_LOCKED);
3199 		}
3200 		if (ifa == NULL) {
3201 			/* Can't find an interface with that address */
3202 			SCTP_INP_WUNLOCK(inp);
3203 			SCTP_INP_INFO_WUNLOCK();
3204 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3205 			return (EADDRNOTAVAIL);
3206 		}
3207 #ifdef INET6
3208 		if (addr->sa_family == AF_INET6) {
3209 			/* GAK, more FIXME IFA lock? */
3210 			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3211 				/* Can't bind a non-existent addr. */
3212 				SCTP_INP_WUNLOCK(inp);
3213 				SCTP_INP_INFO_WUNLOCK();
3214 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3215 				return (EINVAL);
3216 			}
3217 		}
3218 #endif
3219 		/* we're not bound all */
3220 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3221 		/* allow bindx() to send ASCONF's for binding changes */
3222 		sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3223 		/* clear automatic addr changes from kernel flag */
3224 		sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3225 
3226 		/* add this address to the endpoint list */
3227 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3228 		if (error != 0) {
3229 			SCTP_INP_WUNLOCK(inp);
3230 			SCTP_INP_INFO_WUNLOCK();
3231 			return (error);
3232 		}
3233 		inp->laddr_count++;
3234 	}
3235 	/* find the bucket */
3236 	if (port_reuse_active) {
3237 		/* Put it into tcp 1-2-1 hash */
3238 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3239 		inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3240 	} else {
3241 		head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3242 	}
3243 	/* put it in the bucket */
3244 	LIST_INSERT_HEAD(head, inp, sctp_hash);
3245 	SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3246 	    (void *)head, ntohs(lport), port_reuse_active);
3247 	/* set in the port */
3248 	inp->sctp_lport = lport;
3249 
3250 	/* turn off just the unbound flag */
3251 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3252 	SCTP_INP_WUNLOCK(inp);
3253 	SCTP_INP_INFO_WUNLOCK();
3254 	return (0);
3255 }
3256 
3257 
3258 static void
3259 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3260 {
3261 	struct sctp_iterator *it, *nit;
3262 
3263 	/*
3264 	 * We enter with the only the ITERATOR_LOCK in place and a write
3265 	 * lock on the inp_info stuff.
3266 	 */
3267 	it = sctp_it_ctl.cur_it;
3268 	if (it && (it->vn != curvnet)) {
3269 		/* Its not looking at our VNET */
3270 		return;
3271 	}
3272 	if (it && (it->inp == inp)) {
3273 		/*
3274 		 * This is tricky and we hold the iterator lock, but when it
3275 		 * returns and gets the lock (when we release it) the
3276 		 * iterator will try to operate on inp. We need to stop that
3277 		 * from happening. But of course the iterator has a
3278 		 * reference on the stcb and inp. We can mark it and it will
3279 		 * stop.
3280 		 *
3281 		 * If its a single iterator situation, we set the end
3282 		 * iterator flag. Otherwise we set the iterator to go to the
3283 		 * next inp.
3284 		 *
3285 		 */
3286 		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3287 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3288 		} else {
3289 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3290 		}
3291 	}
3292 	/*
3293 	 * Now go through and remove any single reference to our inp that
3294 	 * may be still pending on the list
3295 	 */
3296 	SCTP_IPI_ITERATOR_WQ_LOCK();
3297 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3298 		if (it->vn != curvnet) {
3299 			continue;
3300 		}
3301 		if (it->inp == inp) {
3302 			/* This one points to me is it inp specific? */
3303 			if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3304 				/* Remove and free this one */
3305 				TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3306 				    it, sctp_nxt_itr);
3307 				if (it->function_atend != NULL) {
3308 					(*it->function_atend) (it->pointer, it->val);
3309 				}
3310 				SCTP_FREE(it, SCTP_M_ITER);
3311 			} else {
3312 				it->inp = LIST_NEXT(it->inp, sctp_list);
3313 				if (it->inp) {
3314 					SCTP_INP_INCR_REF(it->inp);
3315 				}
3316 			}
3317 			/*
3318 			 * When its put in the refcnt is incremented so decr
3319 			 * it
3320 			 */
3321 			SCTP_INP_DECR_REF(inp);
3322 		}
3323 	}
3324 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
3325 }
3326 
3327 /* release sctp_inpcb unbind the port */
3328 void
3329 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3330 {
3331 	/*
3332 	 * Here we free a endpoint. We must find it (if it is in the Hash
3333 	 * table) and remove it from there. Then we must also find it in the
3334 	 * overall list and remove it from there. After all removals are
3335 	 * complete then any timer has to be stopped. Then start the actual
3336 	 * freeing. a) Any local lists. b) Any associations. c) The hash of
3337 	 * all associations. d) finally the ep itself.
3338 	 */
3339 	struct sctp_tcb *asoc, *nasoc;
3340 	struct sctp_laddr *laddr, *nladdr;
3341 	struct inpcb *ip_pcb;
3342 	struct socket *so;
3343 	int being_refed = 0;
3344 	struct sctp_queued_to_read *sq, *nsq;
3345 	int cnt;
3346 	sctp_sharedkey_t *shared_key, *nshared_key;
3347 
3348 
3349 #ifdef SCTP_LOG_CLOSING
3350 	sctp_log_closing(inp, NULL, 0);
3351 #endif
3352 	SCTP_ITERATOR_LOCK();
3353 	/* mark any iterators on the list or being processed */
3354 	sctp_iterator_inp_being_freed(inp);
3355 	SCTP_ITERATOR_UNLOCK();
3356 	so = inp->sctp_socket;
3357 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3358 		/* been here before.. eeks.. get out of here */
3359 		SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3360 #ifdef SCTP_LOG_CLOSING
3361 		sctp_log_closing(inp, NULL, 1);
3362 #endif
3363 		return;
3364 	}
3365 	SCTP_ASOC_CREATE_LOCK(inp);
3366 	SCTP_INP_INFO_WLOCK();
3367 
3368 	SCTP_INP_WLOCK(inp);
3369 	if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3370 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3371 		/* socket is gone, so no more wakeups allowed */
3372 		inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3373 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3374 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3375 
3376 	}
3377 	/* First time through we have the socket lock, after that no more. */
3378 	sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3379 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3380 
3381 	if (inp->control) {
3382 		sctp_m_freem(inp->control);
3383 		inp->control = NULL;
3384 	}
3385 	if (inp->pkt) {
3386 		sctp_m_freem(inp->pkt);
3387 		inp->pkt = NULL;
3388 	}
3389 	ip_pcb = &inp->ip_inp.inp;	/* we could just cast the main pointer
3390 					 * here but I will be nice :> (i.e.
3391 					 * ip_pcb = ep;) */
3392 	if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3393 		int cnt_in_sd;
3394 
3395 		cnt_in_sd = 0;
3396 		LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3397 			SCTP_TCB_LOCK(asoc);
3398 			if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3399 				/* Skip guys being freed */
3400 				cnt_in_sd++;
3401 				if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3402 					/*
3403 					 * Special case - we did not start a
3404 					 * kill timer on the asoc due to it
3405 					 * was not closed. So go ahead and
3406 					 * start it now.
3407 					 */
3408 					SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3409 					sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3410 				}
3411 				SCTP_TCB_UNLOCK(asoc);
3412 				continue;
3413 			}
3414 			if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3415 			    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3416 			    (asoc->asoc.total_output_queue_size == 0)) {
3417 				/*
3418 				 * If we have data in queue, we don't want
3419 				 * to just free since the app may have done,
3420 				 * send()/close or connect/send/close. And
3421 				 * it wants the data to get across first.
3422 				 */
3423 				/* Just abandon things in the front states */
3424 				if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3425 				    SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3426 					cnt_in_sd++;
3427 				}
3428 				continue;
3429 			}
3430 			/* Disconnect the socket please */
3431 			asoc->sctp_socket = NULL;
3432 			SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3433 			if ((asoc->asoc.size_on_reasm_queue > 0) ||
3434 			    (asoc->asoc.control_pdapi) ||
3435 			    (asoc->asoc.size_on_all_streams > 0) ||
3436 			    (so && (so->so_rcv.sb_cc > 0))) {
3437 				/* Left with Data unread */
3438 				struct mbuf *op_err;
3439 
3440 				op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3441 				asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3442 				sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3443 				SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3444 				if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3445 				    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3446 					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3447 				}
3448 				if (sctp_free_assoc(inp, asoc,
3449 				    SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3450 					cnt_in_sd++;
3451 				}
3452 				continue;
3453 			} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3454 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3455 			    (asoc->asoc.stream_queue_cnt == 0)) {
3456 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3457 					goto abort_anyway;
3458 				}
3459 				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3460 				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3461 					struct sctp_nets *netp;
3462 
3463 					/*
3464 					 * there is nothing queued to send,
3465 					 * so I send shutdown
3466 					 */
3467 					if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3468 					    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3469 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3470 					}
3471 					SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3472 					sctp_stop_timers_for_shutdown(asoc);
3473 					if (asoc->asoc.alternate) {
3474 						netp = asoc->asoc.alternate;
3475 					} else {
3476 						netp = asoc->asoc.primary_destination;
3477 					}
3478 					sctp_send_shutdown(asoc, netp);
3479 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3480 					    netp);
3481 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3482 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3483 				}
3484 			} else {
3485 				/* mark into shutdown pending */
3486 				SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3487 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL);
3488 				if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3489 					SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3490 				}
3491 				if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3492 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3493 				    (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3494 					struct mbuf *op_err;
3495 
3496 			abort_anyway:
3497 					op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3498 					asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3499 					sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3500 					SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3501 					if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3502 					    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3503 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3504 					}
3505 					if (sctp_free_assoc(inp, asoc,
3506 					    SCTP_PCBFREE_NOFORCE,
3507 					    SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3508 						cnt_in_sd++;
3509 					}
3510 					continue;
3511 				} else {
3512 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3513 				}
3514 			}
3515 			cnt_in_sd++;
3516 			SCTP_TCB_UNLOCK(asoc);
3517 		}
3518 		/* now is there some left in our SHUTDOWN state? */
3519 		if (cnt_in_sd) {
3520 #ifdef SCTP_LOG_CLOSING
3521 			sctp_log_closing(inp, NULL, 2);
3522 #endif
3523 			inp->sctp_socket = NULL;
3524 			SCTP_INP_WUNLOCK(inp);
3525 			SCTP_ASOC_CREATE_UNLOCK(inp);
3526 			SCTP_INP_INFO_WUNLOCK();
3527 			return;
3528 		}
3529 	}
3530 	inp->sctp_socket = NULL;
3531 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3532 	    SCTP_PCB_FLAGS_UNBOUND) {
3533 		/*
3534 		 * ok, this guy has been bound. It's port is somewhere in
3535 		 * the SCTP_BASE_INFO(hash table). Remove it!
3536 		 */
3537 		LIST_REMOVE(inp, sctp_hash);
3538 		inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3539 	}
3540 
3541 	/*
3542 	 * If there is a timer running to kill us, forget it, since it may
3543 	 * have a contest on the INP lock.. which would cause us to die ...
3544 	 */
3545 	cnt = 0;
3546 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3547 		SCTP_TCB_LOCK(asoc);
3548 		if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3549 			/* Disconnect the socket please */
3550 			asoc->sctp_socket = NULL;
3551 			SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3552 		}
3553 		if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3554 			if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3555 				SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3556 				sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3557 			}
3558 			cnt++;
3559 			SCTP_TCB_UNLOCK(asoc);
3560 			continue;
3561 		}
3562 		/* Free associations that are NOT killing us */
3563 		if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3564 		    ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3565 			struct mbuf *op_err;
3566 
3567 			op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3568 			asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3569 			sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3570 			SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3571 		} else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3572 			cnt++;
3573 			SCTP_TCB_UNLOCK(asoc);
3574 			continue;
3575 		}
3576 		if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3577 		    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3578 			SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3579 		}
3580 		if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3581 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3582 			cnt++;
3583 		}
3584 	}
3585 	if (cnt) {
3586 		/* Ok we have someone out there that will kill us */
3587 #ifdef SCTP_LOG_CLOSING
3588 		sctp_log_closing(inp, NULL, 3);
3589 #endif
3590 		SCTP_INP_WUNLOCK(inp);
3591 		SCTP_ASOC_CREATE_UNLOCK(inp);
3592 		SCTP_INP_INFO_WUNLOCK();
3593 		return;
3594 	}
3595 	if (SCTP_INP_LOCK_CONTENDED(inp))
3596 		being_refed++;
3597 	if (SCTP_INP_READ_CONTENDED(inp))
3598 		being_refed++;
3599 	if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3600 		being_refed++;
3601 	/* NOTE: 0 refcount also means no timers are referencing us. */
3602 	if ((inp->refcount) ||
3603 	    (being_refed) ||
3604 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3605 #ifdef SCTP_LOG_CLOSING
3606 		sctp_log_closing(inp, NULL, 4);
3607 #endif
3608 		sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3609 		SCTP_INP_WUNLOCK(inp);
3610 		SCTP_ASOC_CREATE_UNLOCK(inp);
3611 		SCTP_INP_INFO_WUNLOCK();
3612 		return;
3613 	}
3614 	inp->sctp_ep.signature_change.type = 0;
3615 	inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3616 	/*
3617 	 * Remove it from the list .. last thing we need a lock for.
3618 	 */
3619 	LIST_REMOVE(inp, sctp_list);
3620 	SCTP_INP_WUNLOCK(inp);
3621 	SCTP_ASOC_CREATE_UNLOCK(inp);
3622 	SCTP_INP_INFO_WUNLOCK();
3623 
3624 #ifdef SCTP_LOG_CLOSING
3625 	sctp_log_closing(inp, NULL, 5);
3626 #endif
3627 
3628 
3629 	if ((inp->sctp_asocidhash) != NULL) {
3630 		SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3631 		inp->sctp_asocidhash = NULL;
3632 	}
3633 	/* sa_ignore FREED_MEMORY */
3634 	TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3635 		/* Its only abandoned if it had data left */
3636 		if (sq->length)
3637 			SCTP_STAT_INCR(sctps_left_abandon);
3638 
3639 		TAILQ_REMOVE(&inp->read_queue, sq, next);
3640 		sctp_free_remote_addr(sq->whoFrom);
3641 		if (so)
3642 			so->so_rcv.sb_cc -= sq->length;
3643 		if (sq->data) {
3644 			sctp_m_freem(sq->data);
3645 			sq->data = NULL;
3646 		}
3647 		/*
3648 		 * no need to free the net count, since at this point all
3649 		 * assoc's are gone.
3650 		 */
3651 		sctp_free_a_readq(NULL, sq);
3652 	}
3653 	/* Now the sctp_pcb things */
3654 	/*
3655 	 * free each asoc if it is not already closed/free. we can't use the
3656 	 * macro here since le_next will get freed as part of the
3657 	 * sctp_free_assoc() call.
3658 	 */
3659 	if (ip_pcb->inp_options) {
3660 		(void)sctp_m_free(ip_pcb->inp_options);
3661 		ip_pcb->inp_options = 0;
3662 	}
3663 
3664 
3665 #ifdef INET6
3666 	if (ip_pcb->inp_vflag & INP_IPV6) {
3667 		ip6_freepcbopts(ip_pcb->in6p_outputopts);
3668 	}
3669 #endif				/* INET6 */
3670 	ip_pcb->inp_vflag = 0;
3671 	/* free up authentication fields */
3672 	if (inp->sctp_ep.local_auth_chunks != NULL)
3673 		sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3674 	if (inp->sctp_ep.local_hmacs != NULL)
3675 		sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3676 
3677 	LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3678 		LIST_REMOVE(shared_key, next);
3679 		sctp_free_sharedkey(shared_key);
3680 		/* sa_ignore FREED_MEMORY */
3681 	}
3682 
3683 	/*
3684 	 * if we have an address list the following will free the list of
3685 	 * ifaddr's that are set into this ep. Again macro limitations here,
3686 	 * since the LIST_FOREACH could be a bad idea.
3687 	 */
3688 	LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3689 		sctp_remove_laddr(laddr);
3690 	}
3691 
3692 #ifdef SCTP_TRACK_FREED_ASOCS
3693 	/* TEMP CODE */
3694 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3695 		LIST_REMOVE(asoc, sctp_tcblist);
3696 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3697 		SCTP_DECR_ASOC_COUNT();
3698 	}
3699 	/* *** END TEMP CODE *** */
3700 #endif
3701 	/* Now lets see about freeing the EP hash table. */
3702 	if (inp->sctp_tcbhash != NULL) {
3703 		SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3704 		inp->sctp_tcbhash = NULL;
3705 	}
3706 	/* Now we must put the ep memory back into the zone pool */
3707 	crfree(inp->ip_inp.inp.inp_cred);
3708 	INP_LOCK_DESTROY(&inp->ip_inp.inp);
3709 	SCTP_INP_LOCK_DESTROY(inp);
3710 	SCTP_INP_READ_DESTROY(inp);
3711 	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3712 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3713 	SCTP_DECR_EP_COUNT();
3714 }
3715 
3716 
3717 struct sctp_nets *
3718 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3719 {
3720 	struct sctp_nets *net;
3721 
3722 	/* locate the address */
3723 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3724 		if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3725 			return (net);
3726 	}
3727 	return (NULL);
3728 }
3729 
3730 
3731 int
3732 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3733 {
3734 	struct sctp_ifa *sctp_ifa;
3735 
3736 	sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3737 	if (sctp_ifa) {
3738 		return (1);
3739 	} else {
3740 		return (0);
3741 	}
3742 }
3743 
3744 /*
3745  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3746  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3747  * stats of stuff.
3748  */
3749 int
3750 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3751     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3752 {
3753 	/*
3754 	 * The following is redundant to the same lines in the
3755 	 * sctp_aloc_assoc() but is needed since others call the add address
3756 	 * function
3757 	 */
3758 	struct sctp_nets *net, *netfirst;
3759 	int addr_inscope;
3760 
3761 	SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3762 	    from);
3763 	SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3764 
3765 	netfirst = sctp_findnet(stcb, newaddr);
3766 	if (netfirst) {
3767 		/*
3768 		 * Lie and return ok, we don't want to make the association
3769 		 * go away for this behavior. It will happen in the TCP
3770 		 * model in a connected socket. It does not reach the hash
3771 		 * table until after the association is built so it can't be
3772 		 * found. Mark as reachable, since the initial creation will
3773 		 * have been cleared and the NOT_IN_ASSOC flag will have
3774 		 * been added... and we don't want to end up removing it
3775 		 * back out.
3776 		 */
3777 		if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3778 			netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3779 			    SCTP_ADDR_UNCONFIRMED);
3780 		} else {
3781 			netfirst->dest_state = SCTP_ADDR_REACHABLE;
3782 		}
3783 
3784 		return (0);
3785 	}
3786 	addr_inscope = 1;
3787 	switch (newaddr->sa_family) {
3788 #ifdef INET
3789 	case AF_INET:
3790 		{
3791 			struct sockaddr_in *sin;
3792 
3793 			sin = (struct sockaddr_in *)newaddr;
3794 			if (sin->sin_addr.s_addr == 0) {
3795 				/* Invalid address */
3796 				return (-1);
3797 			}
3798 			/* zero out the zero area */
3799 			memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3800 
3801 			/* assure len is set */
3802 			sin->sin_len = sizeof(struct sockaddr_in);
3803 			if (set_scope) {
3804 				if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3805 					stcb->asoc.scope.ipv4_local_scope = 1;
3806 				}
3807 			} else {
3808 				/* Validate the address is in scope */
3809 				if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3810 				    (stcb->asoc.scope.ipv4_local_scope == 0)) {
3811 					addr_inscope = 0;
3812 				}
3813 			}
3814 			break;
3815 		}
3816 #endif
3817 #ifdef INET6
3818 	case AF_INET6:
3819 		{
3820 			struct sockaddr_in6 *sin6;
3821 
3822 			sin6 = (struct sockaddr_in6 *)newaddr;
3823 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3824 				/* Invalid address */
3825 				return (-1);
3826 			}
3827 			/* assure len is set */
3828 			sin6->sin6_len = sizeof(struct sockaddr_in6);
3829 			if (set_scope) {
3830 				if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3831 					stcb->asoc.scope.loopback_scope = 1;
3832 					stcb->asoc.scope.local_scope = 0;
3833 					stcb->asoc.scope.ipv4_local_scope = 1;
3834 					stcb->asoc.scope.site_scope = 1;
3835 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3836 					/*
3837 					 * If the new destination is a
3838 					 * LINK_LOCAL we must have common
3839 					 * site scope. Don't set the local
3840 					 * scope since we may not share all
3841 					 * links, only loopback can do this.
3842 					 * Links on the local network would
3843 					 * also be on our private network
3844 					 * for v4 too.
3845 					 */
3846 					stcb->asoc.scope.ipv4_local_scope = 1;
3847 					stcb->asoc.scope.site_scope = 1;
3848 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3849 					/*
3850 					 * If the new destination is
3851 					 * SITE_LOCAL then we must have site
3852 					 * scope in common.
3853 					 */
3854 					stcb->asoc.scope.site_scope = 1;
3855 				}
3856 			} else {
3857 				/* Validate the address is in scope */
3858 				if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3859 				    (stcb->asoc.scope.loopback_scope == 0)) {
3860 					addr_inscope = 0;
3861 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3862 				    (stcb->asoc.scope.local_scope == 0)) {
3863 					addr_inscope = 0;
3864 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3865 				    (stcb->asoc.scope.site_scope == 0)) {
3866 					addr_inscope = 0;
3867 				}
3868 			}
3869 			break;
3870 		}
3871 #endif
3872 	default:
3873 		/* not supported family type */
3874 		return (-1);
3875 	}
3876 	net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3877 	if (net == NULL) {
3878 		return (-1);
3879 	}
3880 	SCTP_INCR_RADDR_COUNT();
3881 	memset(net, 0, sizeof(struct sctp_nets));
3882 	(void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3883 	memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3884 	switch (newaddr->sa_family) {
3885 #ifdef INET
3886 	case AF_INET:
3887 		((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3888 		break;
3889 #endif
3890 #ifdef INET6
3891 	case AF_INET6:
3892 		((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3893 		break;
3894 #endif
3895 	default:
3896 		break;
3897 	}
3898 	net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3899 	if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3900 		stcb->asoc.scope.loopback_scope = 1;
3901 		stcb->asoc.scope.ipv4_local_scope = 1;
3902 		stcb->asoc.scope.local_scope = 0;
3903 		stcb->asoc.scope.site_scope = 1;
3904 		addr_inscope = 1;
3905 	}
3906 	net->failure_threshold = stcb->asoc.def_net_failure;
3907 	net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3908 	if (addr_inscope == 0) {
3909 		net->dest_state = (SCTP_ADDR_REACHABLE |
3910 		    SCTP_ADDR_OUT_OF_SCOPE);
3911 	} else {
3912 		if (from == SCTP_ADDR_IS_CONFIRMED)
3913 			/* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3914 			net->dest_state = SCTP_ADDR_REACHABLE;
3915 		else
3916 			net->dest_state = SCTP_ADDR_REACHABLE |
3917 			    SCTP_ADDR_UNCONFIRMED;
3918 	}
3919 	/*
3920 	 * We set this to 0, the timer code knows that this means its an
3921 	 * initial value
3922 	 */
3923 	net->rto_needed = 1;
3924 	net->RTO = 0;
3925 	net->RTO_measured = 0;
3926 	stcb->asoc.numnets++;
3927 	net->ref_count = 1;
3928 	net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3929 	net->port = port;
3930 	net->dscp = stcb->asoc.default_dscp;
3931 #ifdef INET6
3932 	net->flowlabel = stcb->asoc.default_flowlabel;
3933 #endif
3934 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3935 		net->dest_state |= SCTP_ADDR_NOHB;
3936 	} else {
3937 		net->dest_state &= ~SCTP_ADDR_NOHB;
3938 	}
3939 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3940 		net->dest_state |= SCTP_ADDR_NO_PMTUD;
3941 	} else {
3942 		net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3943 	}
3944 	net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3945 	/* Init the timer structure */
3946 	SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3947 	SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3948 	SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3949 
3950 	/* Now generate a route for this guy */
3951 #ifdef INET6
3952 	/* KAME hack: embed scopeid */
3953 	if (newaddr->sa_family == AF_INET6) {
3954 		struct sockaddr_in6 *sin6;
3955 
3956 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3957 		(void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3958 		sin6->sin6_scope_id = 0;
3959 	}
3960 #endif
3961 	SCTP_RTALLOC((sctp_route_t *)&net->ro,
3962 	    stcb->asoc.vrf_id,
3963 	    stcb->sctp_ep->fibnum);
3964 
3965 	net->src_addr_selected = 0;
3966 	if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3967 		/* Get source address */
3968 		net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3969 		    stcb,
3970 		    (sctp_route_t *)&net->ro,
3971 		    net,
3972 		    0,
3973 		    stcb->asoc.vrf_id);
3974 		if (stcb->asoc.default_mtu > 0) {
3975 			net->mtu = stcb->asoc.default_mtu;
3976 			switch (net->ro._l_addr.sa.sa_family) {
3977 #ifdef INET
3978 			case AF_INET:
3979 				net->mtu += SCTP_MIN_V4_OVERHEAD;
3980 				break;
3981 #endif
3982 #ifdef INET6
3983 			case AF_INET6:
3984 				net->mtu += SCTP_MIN_OVERHEAD;
3985 				break;
3986 #endif
3987 			default:
3988 				break;
3989 			}
3990 #if defined(INET) || defined(INET6)
3991 			if (net->port) {
3992 				net->mtu += (uint32_t)sizeof(struct udphdr);
3993 			}
3994 #endif
3995 		} else if (net->ro._s_addr != NULL) {
3996 			uint32_t imtu, rmtu, hcmtu;
3997 
3998 			net->src_addr_selected = 1;
3999 			/* Now get the interface MTU */
4000 			if (net->ro._s_addr->ifn_p != NULL) {
4001 				imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4002 			} else {
4003 				imtu = 0;
4004 			}
4005 			rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh);
4006 			hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
4007 			net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
4008 		}
4009 	}
4010 	if (net->mtu == 0) {
4011 		if (stcb->asoc.default_mtu > 0) {
4012 			net->mtu = stcb->asoc.default_mtu;
4013 			switch (net->ro._l_addr.sa.sa_family) {
4014 #ifdef INET
4015 			case AF_INET:
4016 				net->mtu += SCTP_MIN_V4_OVERHEAD;
4017 				break;
4018 #endif
4019 #ifdef INET6
4020 			case AF_INET6:
4021 				net->mtu += SCTP_MIN_OVERHEAD;
4022 				break;
4023 #endif
4024 			default:
4025 				break;
4026 			}
4027 #if defined(INET) || defined(INET6)
4028 			if (net->port) {
4029 				net->mtu += (uint32_t)sizeof(struct udphdr);
4030 			}
4031 #endif
4032 		} else {
4033 			switch (newaddr->sa_family) {
4034 #ifdef INET
4035 			case AF_INET:
4036 				net->mtu = SCTP_DEFAULT_MTU;
4037 				break;
4038 #endif
4039 #ifdef INET6
4040 			case AF_INET6:
4041 				net->mtu = 1280;
4042 				break;
4043 #endif
4044 			default:
4045 				break;
4046 			}
4047 		}
4048 	}
4049 #if defined(INET) || defined(INET6)
4050 	if (net->port) {
4051 		net->mtu -= (uint32_t)sizeof(struct udphdr);
4052 	}
4053 #endif
4054 	if (from == SCTP_ALLOC_ASOC) {
4055 		stcb->asoc.smallest_mtu = net->mtu;
4056 	}
4057 	if (stcb->asoc.smallest_mtu > net->mtu) {
4058 		sctp_pathmtu_adjustment(stcb, net->mtu);
4059 	}
4060 #ifdef INET6
4061 	if (newaddr->sa_family == AF_INET6) {
4062 		struct sockaddr_in6 *sin6;
4063 
4064 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4065 		(void)sa6_recoverscope(sin6);
4066 	}
4067 #endif
4068 
4069 	/* JRS - Use the congestion control given in the CC module */
4070 	if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4071 		(*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4072 
4073 	/*
4074 	 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4075 	 * of assoc (2005/06/27, iyengar@cis.udel.edu)
4076 	 */
4077 	net->find_pseudo_cumack = 1;
4078 	net->find_rtx_pseudo_cumack = 1;
4079 	/* Choose an initial flowid. */
4080 	net->flowid = stcb->asoc.my_vtag ^
4081 	    ntohs(stcb->rport) ^
4082 	    ntohs(stcb->sctp_ep->sctp_lport);
4083 	net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4084 	if (netp) {
4085 		*netp = net;
4086 	}
4087 	netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4088 	if (net->ro.ro_nh == NULL) {
4089 		/* Since we have no route put it at the back */
4090 		TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4091 	} else if (netfirst == NULL) {
4092 		/* We are the first one in the pool. */
4093 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4094 	} else if (netfirst->ro.ro_nh == NULL) {
4095 		/*
4096 		 * First one has NO route. Place this one ahead of the first
4097 		 * one.
4098 		 */
4099 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4100 	} else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) {
4101 		/*
4102 		 * This one has a different interface than the one at the
4103 		 * top of the list. Place it ahead.
4104 		 */
4105 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4106 	} else {
4107 		/*
4108 		 * Ok we have the same interface as the first one. Move
4109 		 * forward until we find either a) one with a NULL route...
4110 		 * insert ahead of that b) one with a different ifp.. insert
4111 		 * after that. c) end of the list.. insert at the tail.
4112 		 */
4113 		struct sctp_nets *netlook;
4114 
4115 		do {
4116 			netlook = TAILQ_NEXT(netfirst, sctp_next);
4117 			if (netlook == NULL) {
4118 				/* End of the list */
4119 				TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4120 				break;
4121 			} else if (netlook->ro.ro_nh == NULL) {
4122 				/* next one has NO route */
4123 				TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4124 				break;
4125 			} else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) {
4126 				TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4127 				    net, sctp_next);
4128 				break;
4129 			}
4130 			/* Shift forward */
4131 			netfirst = netlook;
4132 		} while (netlook != NULL);
4133 	}
4134 
4135 	/* got to have a primary set */
4136 	if (stcb->asoc.primary_destination == 0) {
4137 		stcb->asoc.primary_destination = net;
4138 	} else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) &&
4139 		    (net->ro.ro_nh) &&
4140 	    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4141 		/* No route to current primary adopt new primary */
4142 		stcb->asoc.primary_destination = net;
4143 	}
4144 	/* Validate primary is first */
4145 	net = TAILQ_FIRST(&stcb->asoc.nets);
4146 	if ((net != stcb->asoc.primary_destination) &&
4147 	    (stcb->asoc.primary_destination)) {
4148 		/*
4149 		 * first one on the list is NOT the primary sctp_cmpaddr()
4150 		 * is much more efficient if the primary is the first on the
4151 		 * list, make it so.
4152 		 */
4153 		TAILQ_REMOVE(&stcb->asoc.nets,
4154 		    stcb->asoc.primary_destination, sctp_next);
4155 		TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4156 		    stcb->asoc.primary_destination, sctp_next);
4157 	}
4158 	return (0);
4159 }
4160 
4161 
4162 static uint32_t
4163 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4164 {
4165 	uint32_t id;
4166 	struct sctpasochead *head;
4167 	struct sctp_tcb *lstcb;
4168 
4169 try_again:
4170 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4171 		/* TSNH */
4172 		return (0);
4173 	}
4174 	/*
4175 	 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4176 	 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4177 	 */
4178 	if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4179 		inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4180 	}
4181 	id = inp->sctp_associd_counter;
4182 	inp->sctp_associd_counter++;
4183 	lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4184 	if (lstcb) {
4185 		goto try_again;
4186 	}
4187 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4188 	LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4189 	stcb->asoc.in_asocid_hash = 1;
4190 	return (id);
4191 }
4192 
4193 /*
4194  * allocate an association and add it to the endpoint. The caller must be
4195  * careful to add all additional addresses once they are know right away or
4196  * else the assoc will be may experience a blackout scenario.
4197  */
4198 struct sctp_tcb *
4199 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4200     int *error, uint32_t override_tag, uint32_t vrf_id,
4201     uint16_t o_streams, uint16_t port,
4202     struct thread *p,
4203     int initialize_auth_params)
4204 {
4205 	/* note the p argument is only valid in unbound sockets */
4206 
4207 	struct sctp_tcb *stcb;
4208 	struct sctp_association *asoc;
4209 	struct sctpasochead *head;
4210 	uint16_t rport;
4211 	int err;
4212 
4213 	/*
4214 	 * Assumption made here: Caller has done a
4215 	 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4216 	 * address does not exist already.
4217 	 */
4218 	if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4219 		/* Hit max assoc, sorry no more */
4220 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4221 		*error = ENOBUFS;
4222 		return (NULL);
4223 	}
4224 	if (firstaddr == NULL) {
4225 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4226 		*error = EINVAL;
4227 		return (NULL);
4228 	}
4229 	SCTP_INP_RLOCK(inp);
4230 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4231 	    ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4232 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4233 		/*
4234 		 * If its in the TCP pool, its NOT allowed to create an
4235 		 * association. The parent listener needs to call
4236 		 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4237 		 * off, or connected one does this.. its an error.
4238 		 */
4239 		SCTP_INP_RUNLOCK(inp);
4240 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4241 		*error = EINVAL;
4242 		return (NULL);
4243 	}
4244 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4245 	    (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4246 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4247 		    (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4248 			SCTP_INP_RUNLOCK(inp);
4249 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4250 			*error = EINVAL;
4251 			return (NULL);
4252 		}
4253 	}
4254 	SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4255 #ifdef SCTP_DEBUG
4256 	if (firstaddr) {
4257 		SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4258 		switch (firstaddr->sa_family) {
4259 #ifdef INET
4260 		case AF_INET:
4261 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4262 			    ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4263 			break;
4264 #endif
4265 #ifdef INET6
4266 		case AF_INET6:
4267 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4268 			    ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4269 			break;
4270 #endif
4271 		default:
4272 			break;
4273 		}
4274 	} else {
4275 		SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4276 	}
4277 #endif				/* SCTP_DEBUG */
4278 	switch (firstaddr->sa_family) {
4279 #ifdef INET
4280 	case AF_INET:
4281 		{
4282 			struct sockaddr_in *sin;
4283 
4284 			sin = (struct sockaddr_in *)firstaddr;
4285 			if ((ntohs(sin->sin_port) == 0) ||
4286 			    (sin->sin_addr.s_addr == INADDR_ANY) ||
4287 			    (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4288 			    IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4289 				/* Invalid address */
4290 				SCTP_INP_RUNLOCK(inp);
4291 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4292 				*error = EINVAL;
4293 				return (NULL);
4294 			}
4295 			rport = sin->sin_port;
4296 			break;
4297 		}
4298 #endif
4299 #ifdef INET6
4300 	case AF_INET6:
4301 		{
4302 			struct sockaddr_in6 *sin6;
4303 
4304 			sin6 = (struct sockaddr_in6 *)firstaddr;
4305 			if ((ntohs(sin6->sin6_port) == 0) ||
4306 			    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4307 			    IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4308 				/* Invalid address */
4309 				SCTP_INP_RUNLOCK(inp);
4310 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4311 				*error = EINVAL;
4312 				return (NULL);
4313 			}
4314 			rport = sin6->sin6_port;
4315 			break;
4316 		}
4317 #endif
4318 	default:
4319 		/* not supported family type */
4320 		SCTP_INP_RUNLOCK(inp);
4321 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4322 		*error = EINVAL;
4323 		return (NULL);
4324 	}
4325 	SCTP_INP_RUNLOCK(inp);
4326 	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4327 		/*
4328 		 * If you have not performed a bind, then we need to do the
4329 		 * ephemeral bind for you.
4330 		 */
4331 		if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) {
4332 			/* bind error, probably perm */
4333 			*error = err;
4334 			return (NULL);
4335 		}
4336 	}
4337 	stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4338 	if (stcb == NULL) {
4339 		/* out of memory? */
4340 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4341 		*error = ENOMEM;
4342 		return (NULL);
4343 	}
4344 	SCTP_INCR_ASOC_COUNT();
4345 
4346 	memset(stcb, 0, sizeof(*stcb));
4347 	asoc = &stcb->asoc;
4348 
4349 	SCTP_TCB_LOCK_INIT(stcb);
4350 	SCTP_TCB_SEND_LOCK_INIT(stcb);
4351 	stcb->rport = rport;
4352 	/* setup back pointer's */
4353 	stcb->sctp_ep = inp;
4354 	stcb->sctp_socket = inp->sctp_socket;
4355 	if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4356 		/* failed */
4357 		SCTP_TCB_LOCK_DESTROY(stcb);
4358 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4359 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4360 		SCTP_DECR_ASOC_COUNT();
4361 		*error = err;
4362 		return (NULL);
4363 	}
4364 	/* and the port */
4365 	SCTP_INP_INFO_WLOCK();
4366 	SCTP_INP_WLOCK(inp);
4367 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4368 		/* inpcb freed while alloc going on */
4369 		SCTP_TCB_LOCK_DESTROY(stcb);
4370 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4371 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4372 		SCTP_INP_WUNLOCK(inp);
4373 		SCTP_INP_INFO_WUNLOCK();
4374 		SCTP_DECR_ASOC_COUNT();
4375 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4376 		*error = EINVAL;
4377 		return (NULL);
4378 	}
4379 	SCTP_TCB_LOCK(stcb);
4380 
4381 	asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4382 	/* now that my_vtag is set, add it to the hash */
4383 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4384 	/* put it in the bucket in the vtag hash of assoc's for the system */
4385 	LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4386 	SCTP_INP_INFO_WUNLOCK();
4387 
4388 	if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4389 		/* failure.. memory error? */
4390 		if (asoc->strmout) {
4391 			SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4392 			asoc->strmout = NULL;
4393 		}
4394 		if (asoc->mapping_array) {
4395 			SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4396 			asoc->mapping_array = NULL;
4397 		}
4398 		if (asoc->nr_mapping_array) {
4399 			SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4400 			asoc->nr_mapping_array = NULL;
4401 		}
4402 		SCTP_DECR_ASOC_COUNT();
4403 		SCTP_TCB_UNLOCK(stcb);
4404 		SCTP_TCB_LOCK_DESTROY(stcb);
4405 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4406 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4407 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4408 		SCTP_INP_WUNLOCK(inp);
4409 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4410 		*error = ENOBUFS;
4411 		return (NULL);
4412 	}
4413 	/* Init all the timers */
4414 	SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4415 	SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4416 	SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4417 	SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4418 	SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4419 	SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4420 
4421 	LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4422 	/* now file the port under the hash as well */
4423 	if (inp->sctp_tcbhash != NULL) {
4424 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4425 		    inp->sctp_hashmark)];
4426 		LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4427 	}
4428 	if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) {
4429 		sctp_initialize_auth_params(inp, stcb);
4430 	}
4431 	SCTP_INP_WUNLOCK(inp);
4432 	SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4433 	return (stcb);
4434 }
4435 
4436 
4437 void
4438 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4439 {
4440 	struct sctp_inpcb *inp;
4441 	struct sctp_association *asoc;
4442 
4443 	inp = stcb->sctp_ep;
4444 	asoc = &stcb->asoc;
4445 	asoc->numnets--;
4446 	TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4447 	if (net == asoc->primary_destination) {
4448 		/* Reset primary */
4449 		struct sctp_nets *lnet;
4450 
4451 		lnet = TAILQ_FIRST(&asoc->nets);
4452 		/*
4453 		 * Mobility adaptation Ideally, if deleted destination is
4454 		 * the primary, it becomes a fast retransmission trigger by
4455 		 * the subsequent SET PRIMARY. (by micchie)
4456 		 */
4457 		if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4458 		    SCTP_MOBILITY_BASE) ||
4459 		    sctp_is_mobility_feature_on(stcb->sctp_ep,
4460 		    SCTP_MOBILITY_FASTHANDOFF)) {
4461 			SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4462 			if (asoc->deleted_primary != NULL) {
4463 				SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4464 				goto out;
4465 			}
4466 			asoc->deleted_primary = net;
4467 			atomic_add_int(&net->ref_count, 1);
4468 			memset(&net->lastsa, 0, sizeof(net->lastsa));
4469 			memset(&net->lastsv, 0, sizeof(net->lastsv));
4470 			sctp_mobility_feature_on(stcb->sctp_ep,
4471 			    SCTP_MOBILITY_PRIM_DELETED);
4472 			sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4473 			    stcb->sctp_ep, stcb, NULL);
4474 		}
4475 out:
4476 		/* Try to find a confirmed primary */
4477 		asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4478 	}
4479 	if (net == asoc->last_data_chunk_from) {
4480 		/* Reset primary */
4481 		asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4482 	}
4483 	if (net == asoc->last_control_chunk_from) {
4484 		/* Clear net */
4485 		asoc->last_control_chunk_from = NULL;
4486 	}
4487 	if (net == stcb->asoc.alternate) {
4488 		sctp_free_remote_addr(stcb->asoc.alternate);
4489 		stcb->asoc.alternate = NULL;
4490 	}
4491 	sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
4492 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_9);
4493 	sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
4494 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_10);
4495 	net->dest_state |= SCTP_ADDR_BEING_DELETED;
4496 	sctp_free_remote_addr(net);
4497 }
4498 
4499 /*
4500  * remove a remote endpoint address from an association, it will fail if the
4501  * address does not exist.
4502  */
4503 int
4504 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4505 {
4506 	/*
4507 	 * Here we need to remove a remote address. This is quite simple, we
4508 	 * first find it in the list of address for the association
4509 	 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4510 	 * on that item. Note we do not allow it to be removed if there are
4511 	 * no other addresses.
4512 	 */
4513 	struct sctp_association *asoc;
4514 	struct sctp_nets *net, *nnet;
4515 
4516 	asoc = &stcb->asoc;
4517 
4518 	/* locate the address */
4519 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4520 		if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4521 			continue;
4522 		}
4523 		if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4524 		    remaddr)) {
4525 			/* we found the guy */
4526 			if (asoc->numnets < 2) {
4527 				/* Must have at LEAST two remote addresses */
4528 				return (-1);
4529 			} else {
4530 				sctp_remove_net(stcb, net);
4531 				return (0);
4532 			}
4533 		}
4534 	}
4535 	/* not found. */
4536 	return (-2);
4537 }
4538 
4539 void
4540 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4541 {
4542 	struct sctpvtaghead *chain;
4543 	struct sctp_tagblock *twait_block;
4544 	int found = 0;
4545 	int i;
4546 
4547 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4548 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4549 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4550 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4551 			    (twait_block->vtag_block[i].lport == lport) &&
4552 			    (twait_block->vtag_block[i].rport == rport)) {
4553 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4554 				twait_block->vtag_block[i].v_tag = 0;
4555 				twait_block->vtag_block[i].lport = 0;
4556 				twait_block->vtag_block[i].rport = 0;
4557 				found = 1;
4558 				break;
4559 			}
4560 		}
4561 		if (found)
4562 			break;
4563 	}
4564 }
4565 
4566 int
4567 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4568 {
4569 	struct sctpvtaghead *chain;
4570 	struct sctp_tagblock *twait_block;
4571 	int found = 0;
4572 	int i;
4573 
4574 	SCTP_INP_INFO_WLOCK();
4575 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4576 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4577 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4578 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4579 			    (twait_block->vtag_block[i].lport == lport) &&
4580 			    (twait_block->vtag_block[i].rport == rport)) {
4581 				found = 1;
4582 				break;
4583 			}
4584 		}
4585 		if (found)
4586 			break;
4587 	}
4588 	SCTP_INP_INFO_WUNLOCK();
4589 	return (found);
4590 }
4591 
4592 
4593 void
4594 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4595 {
4596 	struct sctpvtaghead *chain;
4597 	struct sctp_tagblock *twait_block;
4598 	struct timeval now;
4599 	int set, i;
4600 
4601 	if (time == 0) {
4602 		/* Its disabled */
4603 		return;
4604 	}
4605 	(void)SCTP_GETTIME_TIMEVAL(&now);
4606 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4607 	set = 0;
4608 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4609 		/* Block(s) present, lets find space, and expire on the fly */
4610 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4611 			if ((twait_block->vtag_block[i].v_tag == 0) &&
4612 			    !set) {
4613 				twait_block->vtag_block[i].tv_sec_at_expire =
4614 				    now.tv_sec + time;
4615 				twait_block->vtag_block[i].v_tag = tag;
4616 				twait_block->vtag_block[i].lport = lport;
4617 				twait_block->vtag_block[i].rport = rport;
4618 				set = 1;
4619 			} else if ((twait_block->vtag_block[i].v_tag) &&
4620 			    ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4621 				/* Audit expires this guy */
4622 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4623 				twait_block->vtag_block[i].v_tag = 0;
4624 				twait_block->vtag_block[i].lport = 0;
4625 				twait_block->vtag_block[i].rport = 0;
4626 				if (set == 0) {
4627 					/* Reuse it for my new tag */
4628 					twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4629 					twait_block->vtag_block[i].v_tag = tag;
4630 					twait_block->vtag_block[i].lport = lport;
4631 					twait_block->vtag_block[i].rport = rport;
4632 					set = 1;
4633 				}
4634 			}
4635 		}
4636 		if (set) {
4637 			/*
4638 			 * We only do up to the block where we can place our
4639 			 * tag for audits
4640 			 */
4641 			break;
4642 		}
4643 	}
4644 	/* Need to add a new block to chain */
4645 	if (!set) {
4646 		SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4647 		    sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4648 		if (twait_block == NULL) {
4649 			return;
4650 		}
4651 		memset(twait_block, 0, sizeof(struct sctp_tagblock));
4652 		LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4653 		twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4654 		twait_block->vtag_block[0].v_tag = tag;
4655 		twait_block->vtag_block[0].lport = lport;
4656 		twait_block->vtag_block[0].rport = rport;
4657 	}
4658 }
4659 
4660 void
4661 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4662 {
4663 	struct sctp_tmit_chunk *chk, *nchk;
4664 	struct sctp_queued_to_read *control, *ncontrol;
4665 
4666 	TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4667 		TAILQ_REMOVE(rh, control, next_instrm);
4668 		control->on_strm_q = 0;
4669 		if (control->on_read_q == 0) {
4670 			sctp_free_remote_addr(control->whoFrom);
4671 			if (control->data) {
4672 				sctp_m_freem(control->data);
4673 				control->data = NULL;
4674 			}
4675 		}
4676 		/* Reassembly free? */
4677 		TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4678 			TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4679 			if (chk->data) {
4680 				sctp_m_freem(chk->data);
4681 				chk->data = NULL;
4682 			}
4683 			if (chk->holds_key_ref)
4684 				sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4685 			sctp_free_remote_addr(chk->whoTo);
4686 			SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4687 			SCTP_DECR_CHK_COUNT();
4688 			/* sa_ignore FREED_MEMORY */
4689 		}
4690 		/*
4691 		 * We don't free the address here since all the net's were
4692 		 * freed above.
4693 		 */
4694 		if (control->on_read_q == 0) {
4695 			sctp_free_a_readq(stcb, control);
4696 		}
4697 	}
4698 }
4699 
4700 /*-
4701  * Free the association after un-hashing the remote port. This
4702  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4703  * expect that the input to this function IS a locked TCB.
4704  * It will return 0, if it did NOT destroy the association (instead
4705  * it unlocks it. It will return NON-zero if it either destroyed the
4706  * association OR the association is already destroyed.
4707  */
4708 int
4709 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4710 {
4711 	int i;
4712 	struct sctp_association *asoc;
4713 	struct sctp_nets *net, *nnet;
4714 	struct sctp_laddr *laddr, *naddr;
4715 	struct sctp_tmit_chunk *chk, *nchk;
4716 	struct sctp_asconf_addr *aparam, *naparam;
4717 	struct sctp_asconf_ack *aack, *naack;
4718 	struct sctp_stream_reset_list *strrst, *nstrrst;
4719 	struct sctp_queued_to_read *sq, *nsq;
4720 	struct sctp_stream_queue_pending *sp, *nsp;
4721 	sctp_sharedkey_t *shared_key, *nshared_key;
4722 	struct socket *so;
4723 
4724 	/* first, lets purge the entry from the hash table. */
4725 
4726 #ifdef SCTP_LOG_CLOSING
4727 	sctp_log_closing(inp, stcb, 6);
4728 #endif
4729 	if (stcb->asoc.state == 0) {
4730 #ifdef SCTP_LOG_CLOSING
4731 		sctp_log_closing(inp, NULL, 7);
4732 #endif
4733 		/* there is no asoc, really TSNH :-0 */
4734 		return (1);
4735 	}
4736 	if (stcb->asoc.alternate) {
4737 		sctp_free_remote_addr(stcb->asoc.alternate);
4738 		stcb->asoc.alternate = NULL;
4739 	}
4740 	/* TEMP CODE */
4741 	if (stcb->freed_from_where == 0) {
4742 		/* Only record the first place free happened from */
4743 		stcb->freed_from_where = from_location;
4744 	}
4745 	/* TEMP CODE */
4746 
4747 	asoc = &stcb->asoc;
4748 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4749 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4750 		/* nothing around */
4751 		so = NULL;
4752 	else
4753 		so = inp->sctp_socket;
4754 
4755 	/*
4756 	 * We used timer based freeing if a reader or writer is in the way.
4757 	 * So we first check if we are actually being called from a timer,
4758 	 * if so we abort early if a reader or writer is still in the way.
4759 	 */
4760 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4761 	    (from_inpcbfree == SCTP_NORMAL_PROC)) {
4762 		/*
4763 		 * is it the timer driving us? if so are the reader/writers
4764 		 * gone?
4765 		 */
4766 		if (stcb->asoc.refcnt) {
4767 			/* nope, reader or writer in the way */
4768 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4769 			/* no asoc destroyed */
4770 			SCTP_TCB_UNLOCK(stcb);
4771 #ifdef SCTP_LOG_CLOSING
4772 			sctp_log_closing(inp, stcb, 8);
4773 #endif
4774 			return (0);
4775 		}
4776 	}
4777 	/* Now clean up any other timers */
4778 	sctp_stop_association_timers(stcb, false);
4779 	/* Now the read queue needs to be cleaned up (only once) */
4780 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4781 		SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4782 		SCTP_INP_READ_LOCK(inp);
4783 		TAILQ_FOREACH(sq, &inp->read_queue, next) {
4784 			if (sq->stcb == stcb) {
4785 				sq->do_not_ref_stcb = 1;
4786 				sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4787 				/*
4788 				 * If there is no end, there never will be
4789 				 * now.
4790 				 */
4791 				if (sq->end_added == 0) {
4792 					/* Held for PD-API clear that. */
4793 					sq->pdapi_aborted = 1;
4794 					sq->held_length = 0;
4795 					if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4796 						/*
4797 						 * Need to add a PD-API
4798 						 * aborted indication.
4799 						 * Setting the control_pdapi
4800 						 * assures that it will be
4801 						 * added right after this
4802 						 * msg.
4803 						 */
4804 						uint32_t strseq;
4805 
4806 						stcb->asoc.control_pdapi = sq;
4807 						strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4808 						sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4809 						    stcb,
4810 						    SCTP_PARTIAL_DELIVERY_ABORTED,
4811 						    (void *)&strseq,
4812 						    SCTP_SO_LOCKED);
4813 						stcb->asoc.control_pdapi = NULL;
4814 					}
4815 				}
4816 				/* Add an end to wake them */
4817 				sq->end_added = 1;
4818 			}
4819 		}
4820 		SCTP_INP_READ_UNLOCK(inp);
4821 		if (stcb->block_entry) {
4822 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4823 			stcb->block_entry->error = ECONNRESET;
4824 			stcb->block_entry = NULL;
4825 		}
4826 	}
4827 	if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4828 		/*
4829 		 * Someone holds a reference OR the socket is unaccepted
4830 		 * yet.
4831 		 */
4832 		if ((stcb->asoc.refcnt) ||
4833 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4834 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4835 			SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4836 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4837 		}
4838 		SCTP_TCB_UNLOCK(stcb);
4839 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4840 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4841 			/* nothing around */
4842 			so = NULL;
4843 		if (so) {
4844 			/* Wake any reader/writers */
4845 			sctp_sorwakeup(inp, so);
4846 			sctp_sowwakeup(inp, so);
4847 		}
4848 
4849 #ifdef SCTP_LOG_CLOSING
4850 		sctp_log_closing(inp, stcb, 9);
4851 #endif
4852 		/* no asoc destroyed */
4853 		return (0);
4854 	}
4855 #ifdef SCTP_LOG_CLOSING
4856 	sctp_log_closing(inp, stcb, 10);
4857 #endif
4858 	/*
4859 	 * When I reach here, no others want to kill the assoc yet.. and I
4860 	 * own the lock. Now its possible an abort comes in when I do the
4861 	 * lock exchange below to grab all the locks to do the final take
4862 	 * out. to prevent this we increment the count, which will start a
4863 	 * timer and blow out above thus assuring us that we hold exclusive
4864 	 * killing of the asoc. Note that after getting back the TCB lock we
4865 	 * will go ahead and increment the counter back up and stop any
4866 	 * timer a passing stranger may have started :-S
4867 	 */
4868 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4869 		atomic_add_int(&stcb->asoc.refcnt, 1);
4870 
4871 		SCTP_TCB_UNLOCK(stcb);
4872 		SCTP_INP_INFO_WLOCK();
4873 		SCTP_INP_WLOCK(inp);
4874 		SCTP_TCB_LOCK(stcb);
4875 	}
4876 	/* Double check the GONE flag */
4877 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4878 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4879 		/* nothing around */
4880 		so = NULL;
4881 
4882 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4883 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4884 		/*
4885 		 * For TCP type we need special handling when we are
4886 		 * connected. We also include the peel'ed off ones to.
4887 		 */
4888 		if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4889 			inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4890 			inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4891 			if (so) {
4892 				SOCKBUF_LOCK(&so->so_rcv);
4893 				so->so_state &= ~(SS_ISCONNECTING |
4894 				    SS_ISDISCONNECTING |
4895 				    SS_ISCONFIRMING |
4896 				    SS_ISCONNECTED);
4897 				so->so_state |= SS_ISDISCONNECTED;
4898 				socantrcvmore_locked(so);
4899 				socantsendmore(so);
4900 				sctp_sowwakeup(inp, so);
4901 				sctp_sorwakeup(inp, so);
4902 				SCTP_SOWAKEUP(so);
4903 			}
4904 		}
4905 	}
4906 
4907 	/*
4908 	 * Make it invalid too, that way if its about to run it will abort
4909 	 * and return.
4910 	 */
4911 	/* re-increment the lock */
4912 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4913 		atomic_add_int(&stcb->asoc.refcnt, -1);
4914 	}
4915 	if (stcb->asoc.refcnt) {
4916 		SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4917 		sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4918 		if (from_inpcbfree == SCTP_NORMAL_PROC) {
4919 			SCTP_INP_INFO_WUNLOCK();
4920 			SCTP_INP_WUNLOCK(inp);
4921 		}
4922 		SCTP_TCB_UNLOCK(stcb);
4923 		return (0);
4924 	}
4925 	asoc->state = 0;
4926 	if (inp->sctp_tcbhash) {
4927 		LIST_REMOVE(stcb, sctp_tcbhash);
4928 	}
4929 	if (stcb->asoc.in_asocid_hash) {
4930 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4931 	}
4932 	/* Now lets remove it from the list of ALL associations in the EP */
4933 	LIST_REMOVE(stcb, sctp_tcblist);
4934 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4935 		SCTP_INP_INCR_REF(inp);
4936 		SCTP_INP_WUNLOCK(inp);
4937 	}
4938 	/* pull from vtag hash */
4939 	LIST_REMOVE(stcb, sctp_asocs);
4940 	sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4941 	    inp->sctp_lport, stcb->rport);
4942 
4943 	/*
4944 	 * Now restop the timers to be sure this is paranoia at is finest!
4945 	 */
4946 	sctp_stop_association_timers(stcb, true);
4947 
4948 	/*
4949 	 * The chunk lists and such SHOULD be empty but we check them just
4950 	 * in case.
4951 	 */
4952 	/* anything on the wheel needs to be removed */
4953 	SCTP_TCB_SEND_LOCK(stcb);
4954 	for (i = 0; i < asoc->streamoutcnt; i++) {
4955 		struct sctp_stream_out *outs;
4956 
4957 		outs = &asoc->strmout[i];
4958 		/* now clean up any chunks here */
4959 		TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4960 			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4961 			TAILQ_REMOVE(&outs->outqueue, sp, next);
4962 			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
4963 			sctp_free_spbufspace(stcb, asoc, sp);
4964 			if (sp->data) {
4965 				if (so) {
4966 					/* Still an open socket - report */
4967 					sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4968 					    0, (void *)sp, SCTP_SO_LOCKED);
4969 				}
4970 				if (sp->data) {
4971 					sctp_m_freem(sp->data);
4972 					sp->data = NULL;
4973 					sp->tail_mbuf = NULL;
4974 					sp->length = 0;
4975 				}
4976 			}
4977 			if (sp->net) {
4978 				sctp_free_remote_addr(sp->net);
4979 				sp->net = NULL;
4980 			}
4981 			sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4982 		}
4983 	}
4984 	SCTP_TCB_SEND_UNLOCK(stcb);
4985 	/* sa_ignore FREED_MEMORY */
4986 	TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4987 		TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4988 		SCTP_FREE(strrst, SCTP_M_STRESET);
4989 	}
4990 	TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4991 		TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4992 		if (sq->data) {
4993 			sctp_m_freem(sq->data);
4994 			sq->data = NULL;
4995 		}
4996 		sctp_free_remote_addr(sq->whoFrom);
4997 		sq->whoFrom = NULL;
4998 		sq->stcb = NULL;
4999 		/* Free the ctl entry */
5000 		sctp_free_a_readq(stcb, sq);
5001 		/* sa_ignore FREED_MEMORY */
5002 	}
5003 	TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5004 		TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5005 		if (chk->data) {
5006 			sctp_m_freem(chk->data);
5007 			chk->data = NULL;
5008 		}
5009 		if (chk->holds_key_ref)
5010 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5011 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5012 		SCTP_DECR_CHK_COUNT();
5013 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5014 		asoc->free_chunk_cnt--;
5015 		/* sa_ignore FREED_MEMORY */
5016 	}
5017 	/* pending send queue SHOULD be empty */
5018 	TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5019 		if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5020 			asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5021 #ifdef INVARIANTS
5022 		} else {
5023 			panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5024 #endif
5025 		}
5026 		TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5027 		if (chk->data) {
5028 			if (so) {
5029 				/* Still a socket? */
5030 				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5031 				    0, chk, SCTP_SO_LOCKED);
5032 			}
5033 			if (chk->data) {
5034 				sctp_m_freem(chk->data);
5035 				chk->data = NULL;
5036 			}
5037 		}
5038 		if (chk->holds_key_ref)
5039 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5040 		if (chk->whoTo) {
5041 			sctp_free_remote_addr(chk->whoTo);
5042 			chk->whoTo = NULL;
5043 		}
5044 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5045 		SCTP_DECR_CHK_COUNT();
5046 		/* sa_ignore FREED_MEMORY */
5047 	}
5048 	/* sent queue SHOULD be empty */
5049 	TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5050 		if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5051 			if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5052 				asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5053 #ifdef INVARIANTS
5054 			} else {
5055 				panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5056 #endif
5057 			}
5058 		}
5059 		TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5060 		if (chk->data) {
5061 			if (so) {
5062 				/* Still a socket? */
5063 				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5064 				    0, chk, SCTP_SO_LOCKED);
5065 			}
5066 			if (chk->data) {
5067 				sctp_m_freem(chk->data);
5068 				chk->data = NULL;
5069 			}
5070 		}
5071 		if (chk->holds_key_ref)
5072 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5073 		sctp_free_remote_addr(chk->whoTo);
5074 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5075 		SCTP_DECR_CHK_COUNT();
5076 		/* sa_ignore FREED_MEMORY */
5077 	}
5078 #ifdef INVARIANTS
5079 	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5080 		if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5081 			panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5082 		}
5083 	}
5084 #endif
5085 	/* control queue MAY not be empty */
5086 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5087 		TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5088 		if (chk->data) {
5089 			sctp_m_freem(chk->data);
5090 			chk->data = NULL;
5091 		}
5092 		if (chk->holds_key_ref)
5093 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5094 		sctp_free_remote_addr(chk->whoTo);
5095 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5096 		SCTP_DECR_CHK_COUNT();
5097 		/* sa_ignore FREED_MEMORY */
5098 	}
5099 	/* ASCONF queue MAY not be empty */
5100 	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5101 		TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5102 		if (chk->data) {
5103 			sctp_m_freem(chk->data);
5104 			chk->data = NULL;
5105 		}
5106 		if (chk->holds_key_ref)
5107 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5108 		sctp_free_remote_addr(chk->whoTo);
5109 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5110 		SCTP_DECR_CHK_COUNT();
5111 		/* sa_ignore FREED_MEMORY */
5112 	}
5113 	if (asoc->mapping_array) {
5114 		SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5115 		asoc->mapping_array = NULL;
5116 	}
5117 	if (asoc->nr_mapping_array) {
5118 		SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5119 		asoc->nr_mapping_array = NULL;
5120 	}
5121 	/* the stream outs */
5122 	if (asoc->strmout) {
5123 		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5124 		asoc->strmout = NULL;
5125 	}
5126 	asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5127 	if (asoc->strmin) {
5128 		for (i = 0; i < asoc->streamincnt; i++) {
5129 			sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5130 			sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5131 		}
5132 		SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5133 		asoc->strmin = NULL;
5134 	}
5135 	asoc->streamincnt = 0;
5136 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5137 #ifdef INVARIANTS
5138 		if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5139 			panic("no net's left alloc'ed, or list points to itself");
5140 		}
5141 #endif
5142 		TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5143 		sctp_free_remote_addr(net);
5144 	}
5145 	LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5146 		/* sa_ignore FREED_MEMORY */
5147 		sctp_remove_laddr(laddr);
5148 	}
5149 
5150 	/* pending asconf (address) parameters */
5151 	TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5152 		/* sa_ignore FREED_MEMORY */
5153 		TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5154 		SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5155 	}
5156 	TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5157 		/* sa_ignore FREED_MEMORY */
5158 		TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5159 		if (aack->data != NULL) {
5160 			sctp_m_freem(aack->data);
5161 		}
5162 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5163 	}
5164 	/* clean up auth stuff */
5165 	if (asoc->local_hmacs)
5166 		sctp_free_hmaclist(asoc->local_hmacs);
5167 	if (asoc->peer_hmacs)
5168 		sctp_free_hmaclist(asoc->peer_hmacs);
5169 
5170 	if (asoc->local_auth_chunks)
5171 		sctp_free_chunklist(asoc->local_auth_chunks);
5172 	if (asoc->peer_auth_chunks)
5173 		sctp_free_chunklist(asoc->peer_auth_chunks);
5174 
5175 	sctp_free_authinfo(&asoc->authinfo);
5176 
5177 	LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5178 		LIST_REMOVE(shared_key, next);
5179 		sctp_free_sharedkey(shared_key);
5180 		/* sa_ignore FREED_MEMORY */
5181 	}
5182 
5183 	/* Insert new items here :> */
5184 
5185 	/* Get rid of LOCK */
5186 	SCTP_TCB_UNLOCK(stcb);
5187 	SCTP_TCB_LOCK_DESTROY(stcb);
5188 	SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5189 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5190 		SCTP_INP_INFO_WUNLOCK();
5191 		SCTP_INP_RLOCK(inp);
5192 	}
5193 #ifdef SCTP_TRACK_FREED_ASOCS
5194 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5195 		/* now clean up the tasoc itself */
5196 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5197 		SCTP_DECR_ASOC_COUNT();
5198 	} else {
5199 		LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5200 	}
5201 #else
5202 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5203 	SCTP_DECR_ASOC_COUNT();
5204 #endif
5205 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5206 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5207 			/*
5208 			 * If its NOT the inp_free calling us AND sctp_close
5209 			 * as been called, we call back...
5210 			 */
5211 			SCTP_INP_RUNLOCK(inp);
5212 			/*
5213 			 * This will start the kill timer (if we are the
5214 			 * last one) since we hold an increment yet. But
5215 			 * this is the only safe way to do this since
5216 			 * otherwise if the socket closes at the same time
5217 			 * we are here we might collide in the cleanup.
5218 			 */
5219 			sctp_inpcb_free(inp,
5220 			    SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5221 			    SCTP_CALLED_DIRECTLY_NOCMPSET);
5222 			SCTP_INP_DECR_REF(inp);
5223 		} else {
5224 			/* The socket is still open. */
5225 			SCTP_INP_DECR_REF(inp);
5226 			SCTP_INP_RUNLOCK(inp);
5227 		}
5228 	}
5229 	/* destroyed the asoc */
5230 #ifdef SCTP_LOG_CLOSING
5231 	sctp_log_closing(inp, NULL, 11);
5232 #endif
5233 	return (1);
5234 }
5235 
5236 
5237 
5238 /*
5239  * determine if a destination is "reachable" based upon the addresses bound
5240  * to the current endpoint (e.g. only v4 or v6 currently bound)
5241  */
5242 /*
5243  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5244  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5245  * types bound as its endpoint
5246  */
5247 int
5248 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5249 {
5250 	struct sctp_inpcb *inp;
5251 	int answer;
5252 
5253 	/*
5254 	 * No locks here, the TCB, in all cases is already locked and an
5255 	 * assoc is up. There is either a INP lock by the caller applied (in
5256 	 * asconf case when deleting an address) or NOT in the HB case,
5257 	 * however if HB then the INP increment is up and the INP will not
5258 	 * be removed (on top of the fact that we have a TCB lock). So we
5259 	 * only want to read the sctp_flags, which is either bound-all or
5260 	 * not.. no protection needed since once an assoc is up you can't be
5261 	 * changing your binding.
5262 	 */
5263 	inp = stcb->sctp_ep;
5264 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5265 		/* if bound all, destination is not restricted */
5266 		/*
5267 		 * RRS: Question during lock work: Is this correct? If you
5268 		 * are bound-all you still might need to obey the V4--V6
5269 		 * flags??? IMO this bound-all stuff needs to be removed!
5270 		 */
5271 		return (1);
5272 	}
5273 	/* NOTE: all "scope" checks are done when local addresses are added */
5274 	switch (destaddr->sa_family) {
5275 #ifdef INET6
5276 	case AF_INET6:
5277 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5278 		break;
5279 #endif
5280 #ifdef INET
5281 	case AF_INET:
5282 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5283 		break;
5284 #endif
5285 	default:
5286 		/* invalid family, so it's unreachable */
5287 		answer = 0;
5288 		break;
5289 	}
5290 	return (answer);
5291 }
5292 
5293 /*
5294  * update the inp_vflags on an endpoint
5295  */
5296 static void
5297 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5298 {
5299 	struct sctp_laddr *laddr;
5300 
5301 	/* first clear the flag */
5302 	inp->ip_inp.inp.inp_vflag = 0;
5303 	/* set the flag based on addresses on the ep list */
5304 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5305 		if (laddr->ifa == NULL) {
5306 			SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5307 			    __func__);
5308 			continue;
5309 		}
5310 
5311 		if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5312 			continue;
5313 		}
5314 		switch (laddr->ifa->address.sa.sa_family) {
5315 #ifdef INET6
5316 		case AF_INET6:
5317 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5318 			break;
5319 #endif
5320 #ifdef INET
5321 		case AF_INET:
5322 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5323 			break;
5324 #endif
5325 		default:
5326 			break;
5327 		}
5328 	}
5329 }
5330 
5331 /*
5332  * Add the address to the endpoint local address list There is nothing to be
5333  * done if we are bound to all addresses
5334  */
5335 void
5336 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5337 {
5338 	struct sctp_laddr *laddr;
5339 	struct sctp_tcb *stcb;
5340 	int fnd, error = 0;
5341 
5342 	fnd = 0;
5343 
5344 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5345 		/* You are already bound to all. You have it already */
5346 		return;
5347 	}
5348 #ifdef INET6
5349 	if (ifa->address.sa.sa_family == AF_INET6) {
5350 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5351 			/* Can't bind a non-useable addr. */
5352 			return;
5353 		}
5354 	}
5355 #endif
5356 	/* first, is it already present? */
5357 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5358 		if (laddr->ifa == ifa) {
5359 			fnd = 1;
5360 			break;
5361 		}
5362 	}
5363 
5364 	if (fnd == 0) {
5365 		/* Not in the ep list */
5366 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5367 		if (error != 0)
5368 			return;
5369 		inp->laddr_count++;
5370 		/* update inp_vflag flags */
5371 		switch (ifa->address.sa.sa_family) {
5372 #ifdef INET6
5373 		case AF_INET6:
5374 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5375 			break;
5376 #endif
5377 #ifdef INET
5378 		case AF_INET:
5379 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5380 			break;
5381 #endif
5382 		default:
5383 			break;
5384 		}
5385 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5386 			sctp_add_local_addr_restricted(stcb, ifa);
5387 		}
5388 	}
5389 	return;
5390 }
5391 
5392 
5393 /*
5394  * select a new (hopefully reachable) destination net (should only be used
5395  * when we deleted an ep addr that is the only usable source address to reach
5396  * the destination net)
5397  */
5398 static void
5399 sctp_select_primary_destination(struct sctp_tcb *stcb)
5400 {
5401 	struct sctp_nets *net;
5402 
5403 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5404 		/* for now, we'll just pick the first reachable one we find */
5405 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5406 			continue;
5407 		if (sctp_destination_is_reachable(stcb,
5408 		    (struct sockaddr *)&net->ro._l_addr)) {
5409 			/* found a reachable destination */
5410 			stcb->asoc.primary_destination = net;
5411 		}
5412 	}
5413 	/* I can't there from here! ...we're gonna die shortly... */
5414 }
5415 
5416 
5417 /*
5418  * Delete the address from the endpoint local address list. There is nothing
5419  * to be done if we are bound to all addresses
5420  */
5421 void
5422 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5423 {
5424 	struct sctp_laddr *laddr;
5425 	int fnd;
5426 
5427 	fnd = 0;
5428 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5429 		/* You are already bound to all. You have it already */
5430 		return;
5431 	}
5432 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5433 		if (laddr->ifa == ifa) {
5434 			fnd = 1;
5435 			break;
5436 		}
5437 	}
5438 	if (fnd && (inp->laddr_count < 2)) {
5439 		/* can't delete unless there are at LEAST 2 addresses */
5440 		return;
5441 	}
5442 	if (fnd) {
5443 		/*
5444 		 * clean up any use of this address go through our
5445 		 * associations and clear any last_used_address that match
5446 		 * this one for each assoc, see if a new primary_destination
5447 		 * is needed
5448 		 */
5449 		struct sctp_tcb *stcb;
5450 
5451 		/* clean up "next_addr_touse" */
5452 		if (inp->next_addr_touse == laddr)
5453 			/* delete this address */
5454 			inp->next_addr_touse = NULL;
5455 
5456 		/* clean up "last_used_address" */
5457 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5458 			struct sctp_nets *net;
5459 
5460 			SCTP_TCB_LOCK(stcb);
5461 			if (stcb->asoc.last_used_address == laddr)
5462 				/* delete this address */
5463 				stcb->asoc.last_used_address = NULL;
5464 			/*
5465 			 * Now spin through all the nets and purge any ref
5466 			 * to laddr
5467 			 */
5468 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5469 				if (net->ro._s_addr == laddr->ifa) {
5470 					/* Yep, purge src address selected */
5471 					RO_NHFREE(&net->ro);
5472 					sctp_free_ifa(net->ro._s_addr);
5473 					net->ro._s_addr = NULL;
5474 					net->src_addr_selected = 0;
5475 				}
5476 			}
5477 			SCTP_TCB_UNLOCK(stcb);
5478 		}		/* for each tcb */
5479 		/* remove it from the ep list */
5480 		sctp_remove_laddr(laddr);
5481 		inp->laddr_count--;
5482 		/* update inp_vflag flags */
5483 		sctp_update_ep_vflag(inp);
5484 	}
5485 	return;
5486 }
5487 
5488 /*
5489  * Add the address to the TCB local address restricted list.
5490  * This is a "pending" address list (eg. addresses waiting for an
5491  * ASCONF-ACK response) and cannot be used as a valid source address.
5492  */
5493 void
5494 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5495 {
5496 	struct sctp_laddr *laddr;
5497 	struct sctpladdr *list;
5498 
5499 	/*
5500 	 * Assumes TCB is locked.. and possibly the INP. May need to
5501 	 * confirm/fix that if we need it and is not the case.
5502 	 */
5503 	list = &stcb->asoc.sctp_restricted_addrs;
5504 
5505 #ifdef INET6
5506 	if (ifa->address.sa.sa_family == AF_INET6) {
5507 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5508 			/* Can't bind a non-existent addr. */
5509 			return;
5510 		}
5511 	}
5512 #endif
5513 	/* does the address already exist? */
5514 	LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5515 		if (laddr->ifa == ifa) {
5516 			return;
5517 		}
5518 	}
5519 
5520 	/* add to the list */
5521 	(void)sctp_insert_laddr(list, ifa, 0);
5522 	return;
5523 }
5524 
5525 /*
5526  * Remove a local address from the TCB local address restricted list
5527  */
5528 void
5529 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5530 {
5531 	struct sctp_inpcb *inp;
5532 	struct sctp_laddr *laddr;
5533 
5534 	/*
5535 	 * This is called by asconf work. It is assumed that a) The TCB is
5536 	 * locked and b) The INP is locked. This is true in as much as I can
5537 	 * trace through the entry asconf code where I did these locks.
5538 	 * Again, the ASCONF code is a bit different in that it does lock
5539 	 * the INP during its work often times. This must be since we don't
5540 	 * want other proc's looking up things while what they are looking
5541 	 * up is changing :-D
5542 	 */
5543 
5544 	inp = stcb->sctp_ep;
5545 	/* if subset bound and don't allow ASCONF's, can't delete last */
5546 	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5547 	    sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5548 		if (stcb->sctp_ep->laddr_count < 2) {
5549 			/* can't delete last address */
5550 			return;
5551 		}
5552 	}
5553 	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5554 		/* remove the address if it exists */
5555 		if (laddr->ifa == NULL)
5556 			continue;
5557 		if (laddr->ifa == ifa) {
5558 			sctp_remove_laddr(laddr);
5559 			return;
5560 		}
5561 	}
5562 
5563 	/* address not found! */
5564 	return;
5565 }
5566 
5567 /* sysctl */
5568 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5569 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5570 
5571 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5572 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5573 int *sctp_cpuarry = NULL;
5574 
5575 void
5576 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5577 {
5578 	/* Queue a packet to a processor for the specified core */
5579 	struct sctp_mcore_queue *qent;
5580 	struct sctp_mcore_ctrl *wkq;
5581 	int need_wake = 0;
5582 
5583 	if (sctp_mcore_workers == NULL) {
5584 		/* Something went way bad during setup */
5585 		sctp_input_with_port(m, off, 0);
5586 		return;
5587 	}
5588 	SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5589 	    (sizeof(struct sctp_mcore_queue)),
5590 	    SCTP_M_MCORE);
5591 	if (qent == NULL) {
5592 		/* This is trouble  */
5593 		sctp_input_with_port(m, off, 0);
5594 		return;
5595 	}
5596 	qent->vn = curvnet;
5597 	qent->m = m;
5598 	qent->off = off;
5599 	qent->v6 = 0;
5600 	wkq = &sctp_mcore_workers[cpu_to_use];
5601 	SCTP_MCORE_QLOCK(wkq);
5602 
5603 	TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5604 	if (wkq->running == 0) {
5605 		need_wake = 1;
5606 	}
5607 	SCTP_MCORE_QUNLOCK(wkq);
5608 	if (need_wake) {
5609 		wakeup(&wkq->running);
5610 	}
5611 }
5612 
5613 static void
5614 sctp_mcore_thread(void *arg)
5615 {
5616 
5617 	struct sctp_mcore_ctrl *wkq;
5618 	struct sctp_mcore_queue *qent;
5619 
5620 	wkq = (struct sctp_mcore_ctrl *)arg;
5621 	struct mbuf *m;
5622 	int off, v6;
5623 
5624 	/* Wait for first tickle */
5625 	SCTP_MCORE_LOCK(wkq);
5626 	wkq->running = 0;
5627 	msleep(&wkq->running,
5628 	    &wkq->core_mtx,
5629 	    0, "wait for pkt", 0);
5630 	SCTP_MCORE_UNLOCK(wkq);
5631 
5632 	/* Bind to our cpu */
5633 	thread_lock(curthread);
5634 	sched_bind(curthread, wkq->cpuid);
5635 	thread_unlock(curthread);
5636 
5637 	/* Now lets start working */
5638 	SCTP_MCORE_LOCK(wkq);
5639 	/* Now grab lock and go */
5640 	for (;;) {
5641 		SCTP_MCORE_QLOCK(wkq);
5642 skip_sleep:
5643 		wkq->running = 1;
5644 		qent = TAILQ_FIRST(&wkq->que);
5645 		if (qent) {
5646 			TAILQ_REMOVE(&wkq->que, qent, next);
5647 			SCTP_MCORE_QUNLOCK(wkq);
5648 			CURVNET_SET(qent->vn);
5649 			m = qent->m;
5650 			off = qent->off;
5651 			v6 = qent->v6;
5652 			SCTP_FREE(qent, SCTP_M_MCORE);
5653 			if (v6 == 0) {
5654 				sctp_input_with_port(m, off, 0);
5655 			} else {
5656 				SCTP_PRINTF("V6 not yet supported\n");
5657 				sctp_m_freem(m);
5658 			}
5659 			CURVNET_RESTORE();
5660 			SCTP_MCORE_QLOCK(wkq);
5661 		}
5662 		wkq->running = 0;
5663 		if (!TAILQ_EMPTY(&wkq->que)) {
5664 			goto skip_sleep;
5665 		}
5666 		SCTP_MCORE_QUNLOCK(wkq);
5667 		msleep(&wkq->running,
5668 		    &wkq->core_mtx,
5669 		    0, "wait for pkt", 0);
5670 	}
5671 }
5672 
5673 static void
5674 sctp_startup_mcore_threads(void)
5675 {
5676 	int i, cpu;
5677 
5678 	if (mp_ncpus == 1)
5679 		return;
5680 
5681 	if (sctp_mcore_workers != NULL) {
5682 		/*
5683 		 * Already been here in some previous vnet?
5684 		 */
5685 		return;
5686 	}
5687 	SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5688 	    ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5689 	    SCTP_M_MCORE);
5690 	if (sctp_mcore_workers == NULL) {
5691 		/* TSNH I hope */
5692 		return;
5693 	}
5694 	memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5695 	    sizeof(struct sctp_mcore_ctrl)));
5696 	/* Init the structures */
5697 	for (i = 0; i <= mp_maxid; i++) {
5698 		TAILQ_INIT(&sctp_mcore_workers[i].que);
5699 		SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5700 		SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5701 		sctp_mcore_workers[i].cpuid = i;
5702 	}
5703 	if (sctp_cpuarry == NULL) {
5704 		SCTP_MALLOC(sctp_cpuarry, int *,
5705 		    (mp_ncpus * sizeof(int)),
5706 		    SCTP_M_MCORE);
5707 		i = 0;
5708 		CPU_FOREACH(cpu) {
5709 			sctp_cpuarry[i] = cpu;
5710 			i++;
5711 		}
5712 	}
5713 	/* Now start them all */
5714 	CPU_FOREACH(cpu) {
5715 		(void)kproc_create(sctp_mcore_thread,
5716 		    (void *)&sctp_mcore_workers[cpu],
5717 		    &sctp_mcore_workers[cpu].thread_proc,
5718 		    RFPROC,
5719 		    SCTP_KTHREAD_PAGES,
5720 		    SCTP_MCORE_NAME);
5721 	}
5722 }
5723 #endif
5724 
5725 void
5726 sctp_pcb_init(void)
5727 {
5728 	/*
5729 	 * SCTP initialization for the PCB structures should be called by
5730 	 * the sctp_init() function.
5731 	 */
5732 	int i;
5733 	struct timeval tv;
5734 
5735 	if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5736 		/* error I was called twice */
5737 		return;
5738 	}
5739 	SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5740 
5741 #if defined(SCTP_LOCAL_TRACE_BUF)
5742 	memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5743 #endif
5744 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5745 	SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5746 	    ((mp_maxid + 1) * sizeof(struct sctpstat)),
5747 	    SCTP_M_MCORE);
5748 #endif
5749 	(void)SCTP_GETTIME_TIMEVAL(&tv);
5750 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5751 	memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5752 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5753 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5754 #else
5755 	memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5756 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5757 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5758 #endif
5759 	/* init the empty list of (All) Endpoints */
5760 	LIST_INIT(&SCTP_BASE_INFO(listhead));
5761 
5762 
5763 	/* init the hash table of endpoints */
5764 	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5765 	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5766 	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5767 	SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5768 	    &SCTP_BASE_INFO(hashasocmark));
5769 	SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5770 	    &SCTP_BASE_INFO(hashmark));
5771 	SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5772 	    &SCTP_BASE_INFO(hashtcpmark));
5773 	SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5774 
5775 
5776 	SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5777 	    &SCTP_BASE_INFO(hashvrfmark));
5778 
5779 	SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5780 	    &SCTP_BASE_INFO(vrf_ifn_hashmark));
5781 	/* init the zones */
5782 	/*
5783 	 * FIX ME: Should check for NULL returns, but if it does fail we are
5784 	 * doomed to panic anyways... add later maybe.
5785 	 */
5786 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5787 	    sizeof(struct sctp_inpcb), maxsockets);
5788 
5789 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5790 	    sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5791 
5792 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5793 	    sizeof(struct sctp_laddr),
5794 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5795 
5796 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5797 	    sizeof(struct sctp_nets),
5798 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5799 
5800 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5801 	    sizeof(struct sctp_tmit_chunk),
5802 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5803 
5804 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5805 	    sizeof(struct sctp_queued_to_read),
5806 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5807 
5808 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5809 	    sizeof(struct sctp_stream_queue_pending),
5810 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5811 
5812 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5813 	    sizeof(struct sctp_asconf),
5814 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5815 
5816 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5817 	    sizeof(struct sctp_asconf_ack),
5818 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5819 
5820 
5821 	/* Master Lock INIT for info structure */
5822 	SCTP_INP_INFO_LOCK_INIT();
5823 	SCTP_STATLOG_INIT_LOCK();
5824 
5825 	SCTP_IPI_COUNT_INIT();
5826 	SCTP_IPI_ADDR_INIT();
5827 #ifdef SCTP_PACKET_LOGGING
5828 	SCTP_IP_PKTLOG_INIT();
5829 #endif
5830 	LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5831 
5832 	SCTP_WQ_ADDR_INIT();
5833 	/* not sure if we need all the counts */
5834 	SCTP_BASE_INFO(ipi_count_ep) = 0;
5835 	/* assoc/tcb zone info */
5836 	SCTP_BASE_INFO(ipi_count_asoc) = 0;
5837 	/* local addrlist zone info */
5838 	SCTP_BASE_INFO(ipi_count_laddr) = 0;
5839 	/* remote addrlist zone info */
5840 	SCTP_BASE_INFO(ipi_count_raddr) = 0;
5841 	/* chunk info */
5842 	SCTP_BASE_INFO(ipi_count_chunk) = 0;
5843 
5844 	/* socket queue zone info */
5845 	SCTP_BASE_INFO(ipi_count_readq) = 0;
5846 
5847 	/* stream out queue cont */
5848 	SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5849 
5850 	SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5851 	SCTP_BASE_INFO(ipi_free_chunks) = 0;
5852 
5853 	SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5854 
5855 	/* Init the TIMEWAIT list */
5856 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5857 		LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5858 	}
5859 	sctp_startup_iterator();
5860 
5861 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5862 	sctp_startup_mcore_threads();
5863 #endif
5864 
5865 	/*
5866 	 * INIT the default VRF which for BSD is the only one, other O/S's
5867 	 * may have more. But initially they must start with one and then
5868 	 * add the VRF's as addresses are added.
5869 	 */
5870 	sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5871 }
5872 
5873 /*
5874  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5875  */
5876 void
5877 sctp_pcb_finish(void)
5878 {
5879 	struct sctp_vrflist *vrf_bucket;
5880 	struct sctp_vrf *vrf, *nvrf;
5881 	struct sctp_ifn *ifn, *nifn;
5882 	struct sctp_ifa *ifa, *nifa;
5883 	struct sctpvtaghead *chain;
5884 	struct sctp_tagblock *twait_block, *prev_twait_block;
5885 	struct sctp_laddr *wi, *nwi;
5886 	int i;
5887 	struct sctp_iterator *it, *nit;
5888 
5889 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5890 		SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5891 		return;
5892 	}
5893 	SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5894 	/*
5895 	 * In FreeBSD the iterator thread never exits but we do clean up.
5896 	 * The only way FreeBSD reaches here is if we have VRF's but we
5897 	 * still add the ifdef to make it compile on old versions.
5898 	 */
5899 retry:
5900 	SCTP_IPI_ITERATOR_WQ_LOCK();
5901 	/*
5902 	 * sctp_iterator_worker() might be working on an it entry without
5903 	 * holding the lock.  We won't find it on the list either and
5904 	 * continue and free/destroy it.  While holding the lock, spin, to
5905 	 * avoid the race condition as sctp_iterator_worker() will have to
5906 	 * wait to re-acquire the lock.
5907 	 */
5908 	if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5909 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
5910 		SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5911 		    "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5912 		DELAY(10);
5913 		goto retry;
5914 	}
5915 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5916 		if (it->vn != curvnet) {
5917 			continue;
5918 		}
5919 		TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5920 		if (it->function_atend != NULL) {
5921 			(*it->function_atend) (it->pointer, it->val);
5922 		}
5923 		SCTP_FREE(it, SCTP_M_ITER);
5924 	}
5925 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
5926 	SCTP_ITERATOR_LOCK();
5927 	if ((sctp_it_ctl.cur_it) &&
5928 	    (sctp_it_ctl.cur_it->vn == curvnet)) {
5929 		sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5930 	}
5931 	SCTP_ITERATOR_UNLOCK();
5932 	SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5933 	SCTP_WQ_ADDR_LOCK();
5934 	LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5935 		LIST_REMOVE(wi, sctp_nxt_addr);
5936 		SCTP_DECR_LADDR_COUNT();
5937 		if (wi->action == SCTP_DEL_IP_ADDRESS) {
5938 			SCTP_FREE(wi->ifa, SCTP_M_IFA);
5939 		}
5940 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5941 	}
5942 	SCTP_WQ_ADDR_UNLOCK();
5943 
5944 	/*
5945 	 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5946 	 * destroyed first).
5947 	 */
5948 	SCTP_IPI_ADDR_WLOCK();
5949 	vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5950 	LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5951 		LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5952 			LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5953 				/* free the ifa */
5954 				LIST_REMOVE(ifa, next_bucket);
5955 				LIST_REMOVE(ifa, next_ifa);
5956 				SCTP_FREE(ifa, SCTP_M_IFA);
5957 			}
5958 			/* free the ifn */
5959 			LIST_REMOVE(ifn, next_bucket);
5960 			LIST_REMOVE(ifn, next_ifn);
5961 			SCTP_FREE(ifn, SCTP_M_IFN);
5962 		}
5963 		SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5964 		/* free the vrf */
5965 		LIST_REMOVE(vrf, next_vrf);
5966 		SCTP_FREE(vrf, SCTP_M_VRF);
5967 	}
5968 	SCTP_IPI_ADDR_WUNLOCK();
5969 	/* free the vrf hashes */
5970 	SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5971 	SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5972 
5973 	/*
5974 	 * free the TIMEWAIT list elements malloc'd in the function
5975 	 * sctp_add_vtag_to_timewait()...
5976 	 */
5977 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5978 		chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5979 		if (!LIST_EMPTY(chain)) {
5980 			prev_twait_block = NULL;
5981 			LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5982 				if (prev_twait_block) {
5983 					SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5984 				}
5985 				prev_twait_block = twait_block;
5986 			}
5987 			SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5988 		}
5989 	}
5990 
5991 	/* free the locks and mutexes */
5992 #ifdef SCTP_PACKET_LOGGING
5993 	SCTP_IP_PKTLOG_DESTROY();
5994 #endif
5995 	SCTP_IPI_ADDR_DESTROY();
5996 	SCTP_STATLOG_DESTROY();
5997 	SCTP_INP_INFO_LOCK_DESTROY();
5998 
5999 	SCTP_WQ_ADDR_DESTROY();
6000 
6001 	/* Get rid of other stuff too. */
6002 	if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6003 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6004 	if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6005 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6006 	if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6007 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6008 
6009 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6010 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6011 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6012 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6013 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6014 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6015 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6016 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6017 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6018 #if defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6019 	SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6020 #endif
6021 }
6022 
6023 
6024 int
6025 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6026     int offset, int limit,
6027     struct sockaddr *src, struct sockaddr *dst,
6028     struct sockaddr *altsa, uint16_t port)
6029 {
6030 	/*
6031 	 * grub through the INIT pulling addresses and loading them to the
6032 	 * nets structure in the asoc. The from address in the mbuf should
6033 	 * also be loaded (if it is not already). This routine can be called
6034 	 * with either INIT or INIT-ACK's as long as the m points to the IP
6035 	 * packet and the offset points to the beginning of the parameters.
6036 	 */
6037 	struct sctp_inpcb *inp;
6038 	struct sctp_nets *net, *nnet, *net_tmp;
6039 	struct sctp_paramhdr *phdr, param_buf;
6040 	struct sctp_tcb *stcb_tmp;
6041 	uint16_t ptype, plen;
6042 	struct sockaddr *sa;
6043 	uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6044 	struct sctp_auth_random *p_random = NULL;
6045 	uint16_t random_len = 0;
6046 	uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6047 	struct sctp_auth_hmac_algo *hmacs = NULL;
6048 	uint16_t hmacs_len = 0;
6049 	uint8_t saw_asconf = 0;
6050 	uint8_t saw_asconf_ack = 0;
6051 	uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6052 	struct sctp_auth_chunk_list *chunks = NULL;
6053 	uint16_t num_chunks = 0;
6054 	sctp_key_t *new_key;
6055 	uint32_t keylen;
6056 	int got_random = 0, got_hmacs = 0, got_chklist = 0;
6057 	uint8_t peer_supports_ecn;
6058 	uint8_t peer_supports_prsctp;
6059 	uint8_t peer_supports_auth;
6060 	uint8_t peer_supports_asconf;
6061 	uint8_t peer_supports_asconf_ack;
6062 	uint8_t peer_supports_reconfig;
6063 	uint8_t peer_supports_nrsack;
6064 	uint8_t peer_supports_pktdrop;
6065 	uint8_t peer_supports_idata;
6066 #ifdef INET
6067 	struct sockaddr_in sin;
6068 #endif
6069 #ifdef INET6
6070 	struct sockaddr_in6 sin6;
6071 #endif
6072 
6073 	/* First get the destination address setup too. */
6074 #ifdef INET
6075 	memset(&sin, 0, sizeof(sin));
6076 	sin.sin_family = AF_INET;
6077 	sin.sin_len = sizeof(sin);
6078 	sin.sin_port = stcb->rport;
6079 #endif
6080 #ifdef INET6
6081 	memset(&sin6, 0, sizeof(sin6));
6082 	sin6.sin6_family = AF_INET6;
6083 	sin6.sin6_len = sizeof(struct sockaddr_in6);
6084 	sin6.sin6_port = stcb->rport;
6085 #endif
6086 	if (altsa) {
6087 		sa = altsa;
6088 	} else {
6089 		sa = src;
6090 	}
6091 	peer_supports_idata = 0;
6092 	peer_supports_ecn = 0;
6093 	peer_supports_prsctp = 0;
6094 	peer_supports_auth = 0;
6095 	peer_supports_asconf = 0;
6096 	peer_supports_reconfig = 0;
6097 	peer_supports_nrsack = 0;
6098 	peer_supports_pktdrop = 0;
6099 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6100 		/* mark all addresses that we have currently on the list */
6101 		net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6102 	}
6103 	/* does the source address already exist? if so skip it */
6104 	inp = stcb->sctp_ep;
6105 	atomic_add_int(&stcb->asoc.refcnt, 1);
6106 	stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6107 	atomic_add_int(&stcb->asoc.refcnt, -1);
6108 
6109 	if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6110 		/* we must add the source address */
6111 		/* no scope set here since we have a tcb already. */
6112 		switch (sa->sa_family) {
6113 #ifdef INET
6114 		case AF_INET:
6115 			if (stcb->asoc.scope.ipv4_addr_legal) {
6116 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6117 					return (-1);
6118 				}
6119 			}
6120 			break;
6121 #endif
6122 #ifdef INET6
6123 		case AF_INET6:
6124 			if (stcb->asoc.scope.ipv6_addr_legal) {
6125 				if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6126 					return (-2);
6127 				}
6128 			}
6129 			break;
6130 #endif
6131 		default:
6132 			break;
6133 		}
6134 	} else {
6135 		if (net_tmp != NULL && stcb_tmp == stcb) {
6136 			net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6137 		} else if (stcb_tmp != stcb) {
6138 			/* It belongs to another association? */
6139 			if (stcb_tmp)
6140 				SCTP_TCB_UNLOCK(stcb_tmp);
6141 			return (-3);
6142 		}
6143 	}
6144 	if (stcb->asoc.state == 0) {
6145 		/* the assoc was freed? */
6146 		return (-4);
6147 	}
6148 	/* now we must go through each of the params. */
6149 	phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6150 	while (phdr) {
6151 		ptype = ntohs(phdr->param_type);
6152 		plen = ntohs(phdr->param_length);
6153 		/*
6154 		 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6155 		 * (uint32_t)ptype, (int)plen);
6156 		 */
6157 		if (offset + plen > limit) {
6158 			break;
6159 		}
6160 		if (plen < sizeof(struct sctp_paramhdr)) {
6161 			break;
6162 		}
6163 #ifdef INET
6164 		if (ptype == SCTP_IPV4_ADDRESS) {
6165 			if (stcb->asoc.scope.ipv4_addr_legal) {
6166 				struct sctp_ipv4addr_param *p4, p4_buf;
6167 
6168 				/* ok get the v4 address and check/add */
6169 				phdr = sctp_get_next_param(m, offset,
6170 				    (struct sctp_paramhdr *)&p4_buf,
6171 				    sizeof(p4_buf));
6172 				if (plen != sizeof(struct sctp_ipv4addr_param) ||
6173 				    phdr == NULL) {
6174 					return (-5);
6175 				}
6176 				p4 = (struct sctp_ipv4addr_param *)phdr;
6177 				sin.sin_addr.s_addr = p4->addr;
6178 				if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6179 					/* Skip multi-cast addresses */
6180 					goto next_param;
6181 				}
6182 				if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6183 				    (sin.sin_addr.s_addr == INADDR_ANY)) {
6184 					goto next_param;
6185 				}
6186 				sa = (struct sockaddr *)&sin;
6187 				inp = stcb->sctp_ep;
6188 				atomic_add_int(&stcb->asoc.refcnt, 1);
6189 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6190 				    dst, stcb);
6191 				atomic_add_int(&stcb->asoc.refcnt, -1);
6192 
6193 				if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6194 				    inp == NULL) {
6195 					/* we must add the source address */
6196 					/*
6197 					 * no scope set since we have a tcb
6198 					 * already
6199 					 */
6200 
6201 					/*
6202 					 * we must validate the state again
6203 					 * here
6204 					 */
6205 			add_it_now:
6206 					if (stcb->asoc.state == 0) {
6207 						/* the assoc was freed? */
6208 						return (-7);
6209 					}
6210 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6211 						return (-8);
6212 					}
6213 				} else if (stcb_tmp == stcb) {
6214 					if (stcb->asoc.state == 0) {
6215 						/* the assoc was freed? */
6216 						return (-10);
6217 					}
6218 					if (net != NULL) {
6219 						/* clear flag */
6220 						net->dest_state &=
6221 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6222 					}
6223 				} else {
6224 					/*
6225 					 * strange, address is in another
6226 					 * assoc? straighten out locks.
6227 					 */
6228 					if (stcb_tmp) {
6229 						if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6230 							struct mbuf *op_err;
6231 							char msg[SCTP_DIAG_INFO_LEN];
6232 
6233 							/*
6234 							 * in setup state we
6235 							 * abort this guy
6236 							 */
6237 							SCTP_SNPRINTF(msg, sizeof(msg),
6238 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6239 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6240 							    msg);
6241 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6242 							    stcb_tmp, op_err,
6243 							    SCTP_SO_NOT_LOCKED);
6244 							goto add_it_now;
6245 						}
6246 						SCTP_TCB_UNLOCK(stcb_tmp);
6247 					}
6248 
6249 					if (stcb->asoc.state == 0) {
6250 						/* the assoc was freed? */
6251 						return (-12);
6252 					}
6253 					return (-13);
6254 				}
6255 			}
6256 		} else
6257 #endif
6258 #ifdef INET6
6259 		if (ptype == SCTP_IPV6_ADDRESS) {
6260 			if (stcb->asoc.scope.ipv6_addr_legal) {
6261 				/* ok get the v6 address and check/add */
6262 				struct sctp_ipv6addr_param *p6, p6_buf;
6263 
6264 				phdr = sctp_get_next_param(m, offset,
6265 				    (struct sctp_paramhdr *)&p6_buf,
6266 				    sizeof(p6_buf));
6267 				if (plen != sizeof(struct sctp_ipv6addr_param) ||
6268 				    phdr == NULL) {
6269 					return (-14);
6270 				}
6271 				p6 = (struct sctp_ipv6addr_param *)phdr;
6272 				memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6273 				    sizeof(p6->addr));
6274 				if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6275 					/* Skip multi-cast addresses */
6276 					goto next_param;
6277 				}
6278 				if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6279 					/*
6280 					 * Link local make no sense without
6281 					 * scope
6282 					 */
6283 					goto next_param;
6284 				}
6285 				sa = (struct sockaddr *)&sin6;
6286 				inp = stcb->sctp_ep;
6287 				atomic_add_int(&stcb->asoc.refcnt, 1);
6288 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6289 				    dst, stcb);
6290 				atomic_add_int(&stcb->asoc.refcnt, -1);
6291 				if (stcb_tmp == NULL &&
6292 				    (inp == stcb->sctp_ep || inp == NULL)) {
6293 					/*
6294 					 * we must validate the state again
6295 					 * here
6296 					 */
6297 			add_it_now6:
6298 					if (stcb->asoc.state == 0) {
6299 						/* the assoc was freed? */
6300 						return (-16);
6301 					}
6302 					/*
6303 					 * we must add the address, no scope
6304 					 * set
6305 					 */
6306 					if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6307 						return (-17);
6308 					}
6309 				} else if (stcb_tmp == stcb) {
6310 					/*
6311 					 * we must validate the state again
6312 					 * here
6313 					 */
6314 					if (stcb->asoc.state == 0) {
6315 						/* the assoc was freed? */
6316 						return (-19);
6317 					}
6318 					if (net != NULL) {
6319 						/* clear flag */
6320 						net->dest_state &=
6321 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6322 					}
6323 				} else {
6324 					/*
6325 					 * strange, address is in another
6326 					 * assoc? straighten out locks.
6327 					 */
6328 					if (stcb_tmp) {
6329 						if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6330 							struct mbuf *op_err;
6331 							char msg[SCTP_DIAG_INFO_LEN];
6332 
6333 							/*
6334 							 * in setup state we
6335 							 * abort this guy
6336 							 */
6337 							SCTP_SNPRINTF(msg, sizeof(msg),
6338 							    "%s:%d at %s", __FILE__, __LINE__, __func__);
6339 							op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6340 							    msg);
6341 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6342 							    stcb_tmp, op_err,
6343 							    SCTP_SO_NOT_LOCKED);
6344 							goto add_it_now6;
6345 						}
6346 						SCTP_TCB_UNLOCK(stcb_tmp);
6347 					}
6348 					if (stcb->asoc.state == 0) {
6349 						/* the assoc was freed? */
6350 						return (-21);
6351 					}
6352 					return (-22);
6353 				}
6354 			}
6355 		} else
6356 #endif
6357 		if (ptype == SCTP_ECN_CAPABLE) {
6358 			peer_supports_ecn = 1;
6359 		} else if (ptype == SCTP_ULP_ADAPTATION) {
6360 			if (stcb->asoc.state != SCTP_STATE_OPEN) {
6361 				struct sctp_adaptation_layer_indication ai,
6362 				                                *aip;
6363 
6364 				phdr = sctp_get_next_param(m, offset,
6365 				    (struct sctp_paramhdr *)&ai, sizeof(ai));
6366 				aip = (struct sctp_adaptation_layer_indication *)phdr;
6367 				if (aip) {
6368 					stcb->asoc.peers_adaptation = ntohl(aip->indication);
6369 					stcb->asoc.adaptation_needed = 1;
6370 				}
6371 			}
6372 		} else if (ptype == SCTP_SET_PRIM_ADDR) {
6373 			struct sctp_asconf_addr_param lstore, *fee;
6374 			int lptype;
6375 			struct sockaddr *lsa = NULL;
6376 #ifdef INET
6377 			struct sctp_asconf_addrv4_param *fii;
6378 #endif
6379 
6380 			if (stcb->asoc.asconf_supported == 0) {
6381 				return (-100);
6382 			}
6383 			if (plen > sizeof(lstore)) {
6384 				return (-23);
6385 			}
6386 			if (plen < sizeof(struct sctp_asconf_addrv4_param)) {
6387 				return (-101);
6388 			}
6389 			phdr = sctp_get_next_param(m, offset,
6390 			    (struct sctp_paramhdr *)&lstore,
6391 			    plen);
6392 			if (phdr == NULL) {
6393 				return (-24);
6394 			}
6395 			fee = (struct sctp_asconf_addr_param *)phdr;
6396 			lptype = ntohs(fee->addrp.ph.param_type);
6397 			switch (lptype) {
6398 #ifdef INET
6399 			case SCTP_IPV4_ADDRESS:
6400 				if (plen !=
6401 				    sizeof(struct sctp_asconf_addrv4_param)) {
6402 					SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6403 					    (int)sizeof(struct sctp_asconf_addrv4_param),
6404 					    plen);
6405 				} else {
6406 					fii = (struct sctp_asconf_addrv4_param *)fee;
6407 					sin.sin_addr.s_addr = fii->addrp.addr;
6408 					lsa = (struct sockaddr *)&sin;
6409 				}
6410 				break;
6411 #endif
6412 #ifdef INET6
6413 			case SCTP_IPV6_ADDRESS:
6414 				if (plen !=
6415 				    sizeof(struct sctp_asconf_addr_param)) {
6416 					SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6417 					    (int)sizeof(struct sctp_asconf_addr_param),
6418 					    plen);
6419 				} else {
6420 					memcpy(sin6.sin6_addr.s6_addr,
6421 					    fee->addrp.addr,
6422 					    sizeof(fee->addrp.addr));
6423 					lsa = (struct sockaddr *)&sin6;
6424 				}
6425 				break;
6426 #endif
6427 			default:
6428 				break;
6429 			}
6430 			if (lsa) {
6431 				(void)sctp_set_primary_addr(stcb, sa, NULL);
6432 			}
6433 		} else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6434 			stcb->asoc.peer_supports_nat = 1;
6435 		} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6436 			/* Peer supports pr-sctp */
6437 			peer_supports_prsctp = 1;
6438 		} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6439 			/* A supported extension chunk */
6440 			struct sctp_supported_chunk_types_param *pr_supported;
6441 			uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6442 			int num_ent, i;
6443 
6444 			if (plen > sizeof(local_store)) {
6445 				return (-35);
6446 			}
6447 			phdr = sctp_get_next_param(m, offset,
6448 			    (struct sctp_paramhdr *)&local_store, plen);
6449 			if (phdr == NULL) {
6450 				return (-25);
6451 			}
6452 			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6453 			num_ent = plen - sizeof(struct sctp_paramhdr);
6454 			for (i = 0; i < num_ent; i++) {
6455 				switch (pr_supported->chunk_types[i]) {
6456 				case SCTP_ASCONF:
6457 					peer_supports_asconf = 1;
6458 					break;
6459 				case SCTP_ASCONF_ACK:
6460 					peer_supports_asconf_ack = 1;
6461 					break;
6462 				case SCTP_FORWARD_CUM_TSN:
6463 					peer_supports_prsctp = 1;
6464 					break;
6465 				case SCTP_PACKET_DROPPED:
6466 					peer_supports_pktdrop = 1;
6467 					break;
6468 				case SCTP_NR_SELECTIVE_ACK:
6469 					peer_supports_nrsack = 1;
6470 					break;
6471 				case SCTP_STREAM_RESET:
6472 					peer_supports_reconfig = 1;
6473 					break;
6474 				case SCTP_AUTHENTICATION:
6475 					peer_supports_auth = 1;
6476 					break;
6477 				case SCTP_IDATA:
6478 					peer_supports_idata = 1;
6479 					break;
6480 				default:
6481 					/* one I have not learned yet */
6482 					break;
6483 
6484 				}
6485 			}
6486 		} else if (ptype == SCTP_RANDOM) {
6487 			if (plen > sizeof(random_store))
6488 				break;
6489 			if (got_random) {
6490 				/* already processed a RANDOM */
6491 				goto next_param;
6492 			}
6493 			phdr = sctp_get_next_param(m, offset,
6494 			    (struct sctp_paramhdr *)random_store,
6495 			    plen);
6496 			if (phdr == NULL)
6497 				return (-26);
6498 			p_random = (struct sctp_auth_random *)phdr;
6499 			random_len = plen - sizeof(*p_random);
6500 			/* enforce the random length */
6501 			if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6502 				SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6503 				return (-27);
6504 			}
6505 			got_random = 1;
6506 		} else if (ptype == SCTP_HMAC_LIST) {
6507 			uint16_t num_hmacs;
6508 			uint16_t i;
6509 
6510 			if (plen > sizeof(hmacs_store))
6511 				break;
6512 			if (got_hmacs) {
6513 				/* already processed a HMAC list */
6514 				goto next_param;
6515 			}
6516 			phdr = sctp_get_next_param(m, offset,
6517 			    (struct sctp_paramhdr *)hmacs_store,
6518 			    plen);
6519 			if (phdr == NULL)
6520 				return (-28);
6521 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
6522 			hmacs_len = plen - sizeof(*hmacs);
6523 			num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6524 			/* validate the hmac list */
6525 			if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6526 				return (-29);
6527 			}
6528 			if (stcb->asoc.peer_hmacs != NULL)
6529 				sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6530 			stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6531 			if (stcb->asoc.peer_hmacs != NULL) {
6532 				for (i = 0; i < num_hmacs; i++) {
6533 					(void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6534 					    ntohs(hmacs->hmac_ids[i]));
6535 				}
6536 			}
6537 			got_hmacs = 1;
6538 		} else if (ptype == SCTP_CHUNK_LIST) {
6539 			int i;
6540 
6541 			if (plen > sizeof(chunks_store))
6542 				break;
6543 			if (got_chklist) {
6544 				/* already processed a Chunks list */
6545 				goto next_param;
6546 			}
6547 			phdr = sctp_get_next_param(m, offset,
6548 			    (struct sctp_paramhdr *)chunks_store,
6549 			    plen);
6550 			if (phdr == NULL)
6551 				return (-30);
6552 			chunks = (struct sctp_auth_chunk_list *)phdr;
6553 			num_chunks = plen - sizeof(*chunks);
6554 			if (stcb->asoc.peer_auth_chunks != NULL)
6555 				sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6556 			else
6557 				stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6558 			for (i = 0; i < num_chunks; i++) {
6559 				(void)sctp_auth_add_chunk(chunks->chunk_types[i],
6560 				    stcb->asoc.peer_auth_chunks);
6561 				/* record asconf/asconf-ack if listed */
6562 				if (chunks->chunk_types[i] == SCTP_ASCONF)
6563 					saw_asconf = 1;
6564 				if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6565 					saw_asconf_ack = 1;
6566 
6567 			}
6568 			got_chklist = 1;
6569 		} else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6570 			    (ptype == SCTP_STATE_COOKIE) ||
6571 			    (ptype == SCTP_UNRECOG_PARAM) ||
6572 			    (ptype == SCTP_COOKIE_PRESERVE) ||
6573 			    (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6574 			    (ptype == SCTP_ADD_IP_ADDRESS) ||
6575 			    (ptype == SCTP_DEL_IP_ADDRESS) ||
6576 			    (ptype == SCTP_ERROR_CAUSE_IND) ||
6577 		    (ptype == SCTP_SUCCESS_REPORT)) {
6578 			 /* don't care */ ;
6579 		} else {
6580 			if ((ptype & 0x8000) == 0x0000) {
6581 				/*
6582 				 * must stop processing the rest of the
6583 				 * param's. Any report bits were handled
6584 				 * with the call to
6585 				 * sctp_arethere_unrecognized_parameters()
6586 				 * when the INIT or INIT-ACK was first seen.
6587 				 */
6588 				break;
6589 			}
6590 		}
6591 
6592 next_param:
6593 		offset += SCTP_SIZE32(plen);
6594 		if (offset >= limit) {
6595 			break;
6596 		}
6597 		phdr = sctp_get_next_param(m, offset, &param_buf,
6598 		    sizeof(param_buf));
6599 	}
6600 	/* Now check to see if we need to purge any addresses */
6601 	TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6602 		if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6603 		    SCTP_ADDR_NOT_IN_ASSOC) {
6604 			/* This address has been removed from the asoc */
6605 			/* remove and free it */
6606 			stcb->asoc.numnets--;
6607 			TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6608 			sctp_free_remote_addr(net);
6609 			if (net == stcb->asoc.primary_destination) {
6610 				stcb->asoc.primary_destination = NULL;
6611 				sctp_select_primary_destination(stcb);
6612 			}
6613 		}
6614 	}
6615 	if ((stcb->asoc.ecn_supported == 1) &&
6616 	    (peer_supports_ecn == 0)) {
6617 		stcb->asoc.ecn_supported = 0;
6618 	}
6619 	if ((stcb->asoc.prsctp_supported == 1) &&
6620 	    (peer_supports_prsctp == 0)) {
6621 		stcb->asoc.prsctp_supported = 0;
6622 	}
6623 	if ((stcb->asoc.auth_supported == 1) &&
6624 	    ((peer_supports_auth == 0) ||
6625 	    (got_random == 0) || (got_hmacs == 0))) {
6626 		stcb->asoc.auth_supported = 0;
6627 	}
6628 	if ((stcb->asoc.asconf_supported == 1) &&
6629 	    ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6630 	    (stcb->asoc.auth_supported == 0) ||
6631 	    (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6632 		stcb->asoc.asconf_supported = 0;
6633 	}
6634 	if ((stcb->asoc.reconfig_supported == 1) &&
6635 	    (peer_supports_reconfig == 0)) {
6636 		stcb->asoc.reconfig_supported = 0;
6637 	}
6638 	if ((stcb->asoc.idata_supported == 1) &&
6639 	    (peer_supports_idata == 0)) {
6640 		stcb->asoc.idata_supported = 0;
6641 	}
6642 	if ((stcb->asoc.nrsack_supported == 1) &&
6643 	    (peer_supports_nrsack == 0)) {
6644 		stcb->asoc.nrsack_supported = 0;
6645 	}
6646 	if ((stcb->asoc.pktdrop_supported == 1) &&
6647 	    (peer_supports_pktdrop == 0)) {
6648 		stcb->asoc.pktdrop_supported = 0;
6649 	}
6650 	/* validate authentication required parameters */
6651 	if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6652 		/* peer does not support auth but sent a chunks list? */
6653 		return (-31);
6654 	}
6655 	if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6656 		/* peer supports asconf but not auth? */
6657 		return (-32);
6658 	} else if ((peer_supports_asconf == 1) &&
6659 		    (peer_supports_auth == 1) &&
6660 	    ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6661 		return (-33);
6662 	}
6663 	/* concatenate the full random key */
6664 	keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6665 	if (chunks != NULL) {
6666 		keylen += sizeof(*chunks) + num_chunks;
6667 	}
6668 	new_key = sctp_alloc_key(keylen);
6669 	if (new_key != NULL) {
6670 		/* copy in the RANDOM */
6671 		if (p_random != NULL) {
6672 			keylen = sizeof(*p_random) + random_len;
6673 			memcpy(new_key->key, p_random, keylen);
6674 		} else {
6675 			keylen = 0;
6676 		}
6677 		/* append in the AUTH chunks */
6678 		if (chunks != NULL) {
6679 			memcpy(new_key->key + keylen, chunks,
6680 			    sizeof(*chunks) + num_chunks);
6681 			keylen += sizeof(*chunks) + num_chunks;
6682 		}
6683 		/* append in the HMACs */
6684 		if (hmacs != NULL) {
6685 			memcpy(new_key->key + keylen, hmacs,
6686 			    sizeof(*hmacs) + hmacs_len);
6687 		}
6688 	} else {
6689 		/* failed to get memory for the key */
6690 		return (-34);
6691 	}
6692 	if (stcb->asoc.authinfo.peer_random != NULL)
6693 		sctp_free_key(stcb->asoc.authinfo.peer_random);
6694 	stcb->asoc.authinfo.peer_random = new_key;
6695 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6696 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6697 
6698 	return (0);
6699 }
6700 
6701 int
6702 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6703     struct sctp_nets *net)
6704 {
6705 	/* make sure the requested primary address exists in the assoc */
6706 	if (net == NULL && sa)
6707 		net = sctp_findnet(stcb, sa);
6708 
6709 	if (net == NULL) {
6710 		/* didn't find the requested primary address! */
6711 		return (-1);
6712 	} else {
6713 		/* set the primary address */
6714 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6715 			/* Must be confirmed, so queue to set */
6716 			net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6717 			return (0);
6718 		}
6719 		stcb->asoc.primary_destination = net;
6720 		if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6721 			sctp_free_remote_addr(stcb->asoc.alternate);
6722 			stcb->asoc.alternate = NULL;
6723 		}
6724 		net = TAILQ_FIRST(&stcb->asoc.nets);
6725 		if (net != stcb->asoc.primary_destination) {
6726 			/*
6727 			 * first one on the list is NOT the primary
6728 			 * sctp_cmpaddr() is much more efficient if the
6729 			 * primary is the first on the list, make it so.
6730 			 */
6731 			TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6732 			TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6733 		}
6734 		return (0);
6735 	}
6736 }
6737 
6738 int
6739 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6740 {
6741 	/*
6742 	 * This function serves two purposes. It will see if a TAG can be
6743 	 * re-used and return 1 for yes it is ok and 0 for don't use that
6744 	 * tag. A secondary function it will do is purge out old tags that
6745 	 * can be removed.
6746 	 */
6747 	struct sctpvtaghead *chain;
6748 	struct sctp_tagblock *twait_block;
6749 	struct sctpasochead *head;
6750 	struct sctp_tcb *stcb;
6751 	int i;
6752 
6753 	SCTP_INP_INFO_RLOCK();
6754 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6755 	    SCTP_BASE_INFO(hashasocmark))];
6756 	LIST_FOREACH(stcb, head, sctp_asocs) {
6757 		/*
6758 		 * We choose not to lock anything here. TCB's can't be
6759 		 * removed since we have the read lock, so they can't be
6760 		 * freed on us, same thing for the INP. I may be wrong with
6761 		 * this assumption, but we will go with it for now :-)
6762 		 */
6763 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6764 			continue;
6765 		}
6766 		if (stcb->asoc.my_vtag == tag) {
6767 			/* candidate */
6768 			if (stcb->rport != rport) {
6769 				continue;
6770 			}
6771 			if (stcb->sctp_ep->sctp_lport != lport) {
6772 				continue;
6773 			}
6774 			/* Its a used tag set */
6775 			SCTP_INP_INFO_RUNLOCK();
6776 			return (0);
6777 		}
6778 	}
6779 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6780 	/* Now what about timed wait ? */
6781 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6782 		/*
6783 		 * Block(s) are present, lets see if we have this tag in the
6784 		 * list
6785 		 */
6786 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6787 			if (twait_block->vtag_block[i].v_tag == 0) {
6788 				/* not used */
6789 				continue;
6790 			} else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6791 			    now->tv_sec) {
6792 				/* Audit expires this guy */
6793 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
6794 				twait_block->vtag_block[i].v_tag = 0;
6795 				twait_block->vtag_block[i].lport = 0;
6796 				twait_block->vtag_block[i].rport = 0;
6797 			} else if ((twait_block->vtag_block[i].v_tag == tag) &&
6798 				    (twait_block->vtag_block[i].lport == lport) &&
6799 			    (twait_block->vtag_block[i].rport == rport)) {
6800 				/* Bad tag, sorry :< */
6801 				SCTP_INP_INFO_RUNLOCK();
6802 				return (0);
6803 			}
6804 		}
6805 	}
6806 	SCTP_INP_INFO_RUNLOCK();
6807 	return (1);
6808 }
6809 
6810 static void
6811 sctp_drain_mbufs(struct sctp_tcb *stcb)
6812 {
6813 	/*
6814 	 * We must hunt this association for MBUF's past the cumack (i.e.
6815 	 * out of order data that we can renege on).
6816 	 */
6817 	struct sctp_association *asoc;
6818 	struct sctp_tmit_chunk *chk, *nchk;
6819 	uint32_t cumulative_tsn_p1;
6820 	struct sctp_queued_to_read *control, *ncontrol;
6821 	int cnt, strmat;
6822 	uint32_t gap, i;
6823 	int fnd = 0;
6824 
6825 	/* We look for anything larger than the cum-ack + 1 */
6826 
6827 	asoc = &stcb->asoc;
6828 	if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6829 		/* none we can reneg on. */
6830 		return;
6831 	}
6832 	SCTP_STAT_INCR(sctps_protocol_drains_done);
6833 	cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6834 	cnt = 0;
6835 	/* Ok that was fun, now we will drain all the inbound streams? */
6836 	for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6837 		TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6838 #ifdef INVARIANTS
6839 			if (control->on_strm_q != SCTP_ON_ORDERED) {
6840 				panic("Huh control: %p on_q: %d -- not ordered?",
6841 				    control, control->on_strm_q);
6842 			}
6843 #endif
6844 			if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6845 				/* Yep it is above cum-ack */
6846 				cnt++;
6847 				SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6848 				KASSERT(control->length > 0, ("control has zero length"));
6849 				if (asoc->size_on_all_streams >= control->length) {
6850 					asoc->size_on_all_streams -= control->length;
6851 				} else {
6852 #ifdef INVARIANTS
6853 					panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6854 #else
6855 					asoc->size_on_all_streams = 0;
6856 #endif
6857 				}
6858 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6859 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6860 				if (control->on_read_q) {
6861 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6862 					control->on_read_q = 0;
6863 				}
6864 				TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6865 				control->on_strm_q = 0;
6866 				if (control->data) {
6867 					sctp_m_freem(control->data);
6868 					control->data = NULL;
6869 				}
6870 				sctp_free_remote_addr(control->whoFrom);
6871 				/* Now its reasm? */
6872 				TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6873 					cnt++;
6874 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6875 					KASSERT(chk->send_size > 0, ("chunk has zero length"));
6876 					if (asoc->size_on_reasm_queue >= chk->send_size) {
6877 						asoc->size_on_reasm_queue -= chk->send_size;
6878 					} else {
6879 #ifdef INVARIANTS
6880 						panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6881 #else
6882 						asoc->size_on_reasm_queue = 0;
6883 #endif
6884 					}
6885 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6886 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6887 					TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6888 					if (chk->data) {
6889 						sctp_m_freem(chk->data);
6890 						chk->data = NULL;
6891 					}
6892 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6893 				}
6894 				sctp_free_a_readq(stcb, control);
6895 			}
6896 		}
6897 		TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6898 #ifdef INVARIANTS
6899 			if (control->on_strm_q != SCTP_ON_UNORDERED) {
6900 				panic("Huh control: %p on_q: %d -- not unordered?",
6901 				    control, control->on_strm_q);
6902 			}
6903 #endif
6904 			if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6905 				/* Yep it is above cum-ack */
6906 				cnt++;
6907 				SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6908 				KASSERT(control->length > 0, ("control has zero length"));
6909 				if (asoc->size_on_all_streams >= control->length) {
6910 					asoc->size_on_all_streams -= control->length;
6911 				} else {
6912 #ifdef INVARIANTS
6913 					panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6914 #else
6915 					asoc->size_on_all_streams = 0;
6916 #endif
6917 				}
6918 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6919 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6920 				if (control->on_read_q) {
6921 					TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6922 					control->on_read_q = 0;
6923 				}
6924 				TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6925 				control->on_strm_q = 0;
6926 				if (control->data) {
6927 					sctp_m_freem(control->data);
6928 					control->data = NULL;
6929 				}
6930 				sctp_free_remote_addr(control->whoFrom);
6931 				/* Now its reasm? */
6932 				TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6933 					cnt++;
6934 					SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6935 					KASSERT(chk->send_size > 0, ("chunk has zero length"));
6936 					if (asoc->size_on_reasm_queue >= chk->send_size) {
6937 						asoc->size_on_reasm_queue -= chk->send_size;
6938 					} else {
6939 #ifdef INVARIANTS
6940 						panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6941 #else
6942 						asoc->size_on_reasm_queue = 0;
6943 #endif
6944 					}
6945 					sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6946 					SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6947 					TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6948 					if (chk->data) {
6949 						sctp_m_freem(chk->data);
6950 						chk->data = NULL;
6951 					}
6952 					sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6953 				}
6954 				sctp_free_a_readq(stcb, control);
6955 			}
6956 		}
6957 	}
6958 	if (cnt) {
6959 		/* We must back down to see what the new highest is */
6960 		for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6961 			SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6962 			if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6963 				asoc->highest_tsn_inside_map = i;
6964 				fnd = 1;
6965 				break;
6966 			}
6967 		}
6968 		if (!fnd) {
6969 			asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6970 		}
6971 
6972 		/*
6973 		 * Question, should we go through the delivery queue? The
6974 		 * only reason things are on here is the app not reading OR
6975 		 * a p-d-api up. An attacker COULD send enough in to
6976 		 * initiate the PD-API and then send a bunch of stuff to
6977 		 * other streams... these would wind up on the delivery
6978 		 * queue.. and then we would not get to them. But in order
6979 		 * to do this I then have to back-track and un-deliver
6980 		 * sequence numbers in streams.. el-yucko. I think for now
6981 		 * we will NOT look at the delivery queue and leave it to be
6982 		 * something to consider later. An alternative would be to
6983 		 * abort the P-D-API with a notification and then deliver
6984 		 * the data.... Or another method might be to keep track of
6985 		 * how many times the situation occurs and if we see a
6986 		 * possible attack underway just abort the association.
6987 		 */
6988 #ifdef SCTP_DEBUG
6989 		SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6990 #endif
6991 		/*
6992 		 * Now do we need to find a new
6993 		 * asoc->highest_tsn_inside_map?
6994 		 */
6995 		asoc->last_revoke_count = cnt;
6996 		sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
6997 		    SCTP_FROM_SCTP_PCB + SCTP_LOC_11);
6998 		/* sa_ignore NO_NULL_CHK */
6999 		sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7000 		sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7001 	}
7002 	/*
7003 	 * Another issue, in un-setting the TSN's in the mapping array we
7004 	 * DID NOT adjust the highest_tsn marker.  This will cause one of
7005 	 * two things to occur. It may cause us to do extra work in checking
7006 	 * for our mapping array movement. More importantly it may cause us
7007 	 * to SACK every datagram. This may not be a bad thing though since
7008 	 * we will recover once we get our cum-ack above and all this stuff
7009 	 * we dumped recovered.
7010 	 */
7011 }
7012 
7013 void
7014 sctp_drain()
7015 {
7016 	/*
7017 	 * We must walk the PCB lists for ALL associations here. The system
7018 	 * is LOW on MBUF's and needs help. This is where reneging will
7019 	 * occur. We really hope this does NOT happen!
7020 	 */
7021 	VNET_ITERATOR_DECL(vnet_iter);
7022 	VNET_LIST_RLOCK_NOSLEEP();
7023 	VNET_FOREACH(vnet_iter) {
7024 		CURVNET_SET(vnet_iter);
7025 		struct sctp_inpcb *inp;
7026 		struct sctp_tcb *stcb;
7027 
7028 		SCTP_STAT_INCR(sctps_protocol_drain_calls);
7029 		if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7030 #ifdef VIMAGE
7031 			continue;
7032 #else
7033 			return;
7034 #endif
7035 		}
7036 		SCTP_INP_INFO_RLOCK();
7037 		LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7038 			/* For each endpoint */
7039 			SCTP_INP_RLOCK(inp);
7040 			LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7041 				/* For each association */
7042 				SCTP_TCB_LOCK(stcb);
7043 				sctp_drain_mbufs(stcb);
7044 				SCTP_TCB_UNLOCK(stcb);
7045 			}
7046 			SCTP_INP_RUNLOCK(inp);
7047 		}
7048 		SCTP_INP_INFO_RUNLOCK();
7049 		CURVNET_RESTORE();
7050 	}
7051 	VNET_LIST_RUNLOCK_NOSLEEP();
7052 }
7053 
7054 /*
7055  * start a new iterator
7056  * iterates through all endpoints and associations based on the pcb_state
7057  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7058  * assocs and "ef" (optional) is executed when the iterator completes.
7059  * "inpf" (optional) is executed for each new endpoint as it is being
7060  * iterated through. inpe (optional) is called when the inp completes
7061  * its way through all the stcbs.
7062  */
7063 int
7064 sctp_initiate_iterator(inp_func inpf,
7065     asoc_func af,
7066     inp_func inpe,
7067     uint32_t pcb_state,
7068     uint32_t pcb_features,
7069     uint32_t asoc_state,
7070     void *argp,
7071     uint32_t argi,
7072     end_func ef,
7073     struct sctp_inpcb *s_inp,
7074     uint8_t chunk_output_off)
7075 {
7076 	struct sctp_iterator *it = NULL;
7077 
7078 	if (af == NULL) {
7079 		return (-1);
7080 	}
7081 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7082 		SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7083 		    SCTP_BASE_VAR(sctp_pcb_initialized));
7084 		return (-1);
7085 	}
7086 	SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7087 	    SCTP_M_ITER);
7088 	if (it == NULL) {
7089 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7090 		return (-1);
7091 	}
7092 	memset(it, 0, sizeof(*it));
7093 	it->function_assoc = af;
7094 	it->function_inp = inpf;
7095 	if (inpf)
7096 		it->done_current_ep = 0;
7097 	else
7098 		it->done_current_ep = 1;
7099 	it->function_atend = ef;
7100 	it->pointer = argp;
7101 	it->val = argi;
7102 	it->pcb_flags = pcb_state;
7103 	it->pcb_features = pcb_features;
7104 	it->asoc_state = asoc_state;
7105 	it->function_inp_end = inpe;
7106 	it->no_chunk_output = chunk_output_off;
7107 	it->vn = curvnet;
7108 	if (s_inp) {
7109 		/* Assume lock is held here */
7110 		it->inp = s_inp;
7111 		SCTP_INP_INCR_REF(it->inp);
7112 		it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7113 	} else {
7114 		SCTP_INP_INFO_RLOCK();
7115 		it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7116 		if (it->inp) {
7117 			SCTP_INP_INCR_REF(it->inp);
7118 		}
7119 		SCTP_INP_INFO_RUNLOCK();
7120 		it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7121 
7122 	}
7123 	SCTP_IPI_ITERATOR_WQ_LOCK();
7124 	if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7125 		SCTP_IPI_ITERATOR_WQ_UNLOCK();
7126 		SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7127 		    SCTP_BASE_VAR(sctp_pcb_initialized), it);
7128 		SCTP_FREE(it, SCTP_M_ITER);
7129 		return (-1);
7130 	}
7131 	TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7132 	if (sctp_it_ctl.iterator_running == 0) {
7133 		sctp_wakeup_iterator();
7134 	}
7135 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
7136 	/* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7137 	return (0);
7138 }
7139