xref: /freebsd/sys/netinet/sctp_pcb.c (revision cc3f4b99653c34ae64f8a1fddea370abefef680e)
1 /*-
2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * a) Redistributions of source code must retain the above copyright notice,
10  *    this list of conditions and the following disclaimer.
11  *
12  * b) Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in
14  *    the documentation and/or other materials provided with the distribution.
15  *
16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
17  *    contributors may be used to endorse or promote products derived
18  *    from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35 
36 #include <netinet/sctp_os.h>
37 #include <sys/proc.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_pcb.h>
41 #include <netinet/sctputil.h>
42 #include <netinet/sctp.h>
43 #include <netinet/sctp_header.h>
44 #include <netinet/sctp_asconf.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_timer.h>
47 #include <netinet/sctp_bsd_addr.h>
48 #include <netinet/sctp_dtrace_define.h>
49 #include <netinet/udp.h>
50 #ifdef INET6
51 #include <netinet6/ip6_var.h>
52 #endif
53 #include <sys/sched.h>
54 #include <sys/smp.h>
55 #include <sys/unistd.h>
56 
57 
58 VNET_DEFINE(struct sctp_base_info, system_base_info);
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 
79 #endif
80 
81 void
82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
83 {
84 	/*
85 	 * We really don't need to lock this, but I will just because it
86 	 * does not hurt.
87 	 */
88 	SCTP_INP_INFO_RLOCK();
89 	spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
90 	spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
91 	spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
92 	spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
93 	spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
94 	spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
95 	spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
96 	spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
97 	SCTP_INP_INFO_RUNLOCK();
98 }
99 
100 /*-
101  * Addresses are added to VRF's (Virtual Router's). For BSD we
102  * have only the default VRF 0. We maintain a hash list of
103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
104  * these has a list of addresses. When we add a new address
105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
106  * not exist we create it and add it to the list of IFN's
107  * within the VRF. Once we have the sctp_ifn, we add the
108  * address to the list. So we look something like:
109  *
110  * hash-vrf-table
111  *   vrf-> ifn-> ifn -> ifn
112  *   vrf    |
113  *    ...   +--ifa-> ifa -> ifa
114  *   vrf
115  *
116  * We keep these separate lists since the SCTP subsystem will
117  * point to these from its source address selection nets structure.
118  * When an address is deleted it does not happen right away on
119  * the SCTP side, it gets scheduled. What we do when a
120  * delete happens is immediately remove the address from
121  * the master list and decrement the refcount. As our
122  * addip iterator works through and frees the src address
123  * selection pointing to the sctp_ifa, eventually the refcount
124  * will reach 0 and we will delete it. Note that it is assumed
125  * that any locking on system level ifn/ifa is done at the
126  * caller of these functions and these routines will only
127  * lock the SCTP structures as they add or delete things.
128  *
129  * Other notes on VRF concepts.
130  *  - An endpoint can be in multiple VRF's
131  *  - An association lives within a VRF and only one VRF.
132  *  - Any incoming packet we can deduce the VRF for by
133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
134  *  - Any downward send call or connect call must supply the
135  *    VRF via ancillary data or via some sort of set default
136  *    VRF socket option call (again for BSD no brainer since
137  *    the VRF is always 0).
138  *  - An endpoint may add multiple VRF's to it.
139  *  - Listening sockets can accept associations in any
140  *    of the VRF's they are in but the assoc will end up
141  *    in only one VRF (gotten from the packet or connect/send).
142  *
143  */
144 
145 struct sctp_vrf *
146 sctp_allocate_vrf(int vrf_id)
147 {
148 	struct sctp_vrf *vrf = NULL;
149 	struct sctp_vrflist *bucket;
150 
151 	/* First allocate the VRF structure */
152 	vrf = sctp_find_vrf(vrf_id);
153 	if (vrf) {
154 		/* Already allocated */
155 		return (vrf);
156 	}
157 	SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
158 	    SCTP_M_VRF);
159 	if (vrf == NULL) {
160 		/* No memory */
161 #ifdef INVARIANTS
162 		panic("No memory for VRF:%d", vrf_id);
163 #endif
164 		return (NULL);
165 	}
166 	/* setup the VRF */
167 	memset(vrf, 0, sizeof(struct sctp_vrf));
168 	vrf->vrf_id = vrf_id;
169 	LIST_INIT(&vrf->ifnlist);
170 	vrf->total_ifa_count = 0;
171 	vrf->refcount = 0;
172 	/* now also setup table ids */
173 	SCTP_INIT_VRF_TABLEID(vrf);
174 	/* Init the HASH of addresses */
175 	vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
176 	    &vrf->vrf_addr_hashmark);
177 	if (vrf->vrf_addr_hash == NULL) {
178 		/* No memory */
179 #ifdef INVARIANTS
180 		panic("No memory for VRF:%d", vrf_id);
181 #endif
182 		SCTP_FREE(vrf, SCTP_M_VRF);
183 		return (NULL);
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 	hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
204 	LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
205 		if (sctp_ifnp->ifn_index == ifn_index) {
206 			return (sctp_ifnp);
207 		}
208 		if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
209 			return (sctp_ifnp);
210 		}
211 	}
212 	return (NULL);
213 }
214 
215 
216 struct sctp_vrf *
217 sctp_find_vrf(uint32_t vrf_id)
218 {
219 	struct sctp_vrflist *bucket;
220 	struct sctp_vrf *liste;
221 
222 	bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
223 	LIST_FOREACH(liste, bucket, next_vrf) {
224 		if (vrf_id == liste->vrf_id) {
225 			return (liste);
226 		}
227 	}
228 	return (NULL);
229 }
230 
231 
232 void
233 sctp_free_vrf(struct sctp_vrf *vrf)
234 {
235 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
236 		if (vrf->vrf_addr_hash) {
237 			SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
238 			vrf->vrf_addr_hash = NULL;
239 		}
240 		/* We zero'd the count */
241 		LIST_REMOVE(vrf, next_vrf);
242 		SCTP_FREE(vrf, SCTP_M_VRF);
243 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
244 	}
245 }
246 
247 
248 void
249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
250 {
251 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
252 		/* We zero'd the count */
253 		if (sctp_ifnp->vrf) {
254 			sctp_free_vrf(sctp_ifnp->vrf);
255 		}
256 		SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
257 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
258 	}
259 }
260 
261 
262 void
263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
264 {
265 	struct sctp_ifn *sctp_ifnp;
266 
267 	sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
268 	if (sctp_ifnp != NULL) {
269 		sctp_ifnp->ifn_mtu = mtu;
270 	}
271 }
272 
273 
274 void
275 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
276 {
277 	if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
278 		/* We zero'd the count */
279 		if (sctp_ifap->ifn_p) {
280 			sctp_free_ifn(sctp_ifap->ifn_p);
281 		}
282 		SCTP_FREE(sctp_ifap, SCTP_M_IFA);
283 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
284 	}
285 }
286 
287 
288 static void
289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
290 {
291 	struct sctp_ifn *found;
292 
293 	found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
294 	if (found == NULL) {
295 		/* Not in the list.. sorry */
296 		return;
297 	}
298 	if (hold_addr_lock == 0)
299 		SCTP_IPI_ADDR_WLOCK();
300 	LIST_REMOVE(sctp_ifnp, next_bucket);
301 	LIST_REMOVE(sctp_ifnp, next_ifn);
302 	SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
303 	    sctp_ifnp->registered_af);
304 	if (hold_addr_lock == 0)
305 		SCTP_IPI_ADDR_WUNLOCK();
306 	/* Take away the reference, and possibly free it */
307 	sctp_free_ifn(sctp_ifnp);
308 }
309 
310 
311 void
312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
313     const char *if_name, uint32_t ifn_index)
314 {
315 	struct sctp_vrf *vrf;
316 	struct sctp_ifa *sctp_ifap;
317 
318 	SCTP_IPI_ADDR_RLOCK();
319 	vrf = sctp_find_vrf(vrf_id);
320 	if (vrf == NULL) {
321 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
322 		goto out;
323 
324 	}
325 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
326 	if (sctp_ifap == NULL) {
327 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
328 		goto out;
329 	}
330 	if (sctp_ifap->ifn_p == NULL) {
331 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
332 		goto out;
333 	}
334 	if (if_name) {
335 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
336 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
337 			    sctp_ifap->ifn_p->ifn_name, if_name);
338 			goto out;
339 		}
340 	} else {
341 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
342 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
343 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
344 			goto out;
345 		}
346 	}
347 
348 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
349 	sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
350 out:
351 	SCTP_IPI_ADDR_RUNLOCK();
352 }
353 
354 
355 void
356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
357     const char *if_name, uint32_t ifn_index)
358 {
359 	struct sctp_vrf *vrf;
360 	struct sctp_ifa *sctp_ifap;
361 
362 	SCTP_IPI_ADDR_RLOCK();
363 	vrf = sctp_find_vrf(vrf_id);
364 	if (vrf == NULL) {
365 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
366 		goto out;
367 
368 	}
369 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
370 	if (sctp_ifap == NULL) {
371 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
372 		goto out;
373 	}
374 	if (sctp_ifap->ifn_p == NULL) {
375 		SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
376 		goto out;
377 	}
378 	if (if_name) {
379 		if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
380 			SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
381 			    sctp_ifap->ifn_p->ifn_name, if_name);
382 			goto out;
383 		}
384 	} else {
385 		if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
386 			SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
387 			    sctp_ifap->ifn_p->ifn_index, ifn_index);
388 			goto out;
389 		}
390 	}
391 
392 	sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
393 	sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
394 out:
395 	SCTP_IPI_ADDR_RUNLOCK();
396 }
397 
398 
399 /*-
400  * Add an ifa to an ifn.
401  * Register the interface as necessary.
402  * NOTE: ADDR write lock MUST be held.
403  */
404 static void
405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
406 {
407 	int ifa_af;
408 
409 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
410 	sctp_ifap->ifn_p = sctp_ifnp;
411 	atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
412 	/* update address counts */
413 	sctp_ifnp->ifa_count++;
414 	ifa_af = sctp_ifap->address.sa.sa_family;
415 	switch (ifa_af) {
416 #ifdef INET
417 	case AF_INET:
418 		sctp_ifnp->num_v4++;
419 		break;
420 #endif
421 #ifdef INET6
422 	case AF_INET6:
423 		sctp_ifnp->num_v6++;
424 		break;
425 #endif
426 	default:
427 		break;
428 	}
429 	if (sctp_ifnp->ifa_count == 1) {
430 		/* register the new interface */
431 		SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
432 		sctp_ifnp->registered_af = ifa_af;
433 	}
434 }
435 
436 
437 /*-
438  * Remove an ifa from its ifn.
439  * If no more addresses exist, remove the ifn too. Otherwise, re-register
440  * the interface based on the remaining address families left.
441  * NOTE: ADDR write lock MUST be held.
442  */
443 static void
444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
445 {
446 	LIST_REMOVE(sctp_ifap, next_ifa);
447 	if (sctp_ifap->ifn_p) {
448 		/* update address counts */
449 		sctp_ifap->ifn_p->ifa_count--;
450 		switch (sctp_ifap->address.sa.sa_family) {
451 #ifdef INET
452 		case AF_INET:
453 			sctp_ifap->ifn_p->num_v4--;
454 			break;
455 #endif
456 #ifdef INET6
457 		case AF_INET6:
458 			sctp_ifap->ifn_p->num_v6--;
459 			break;
460 #endif
461 		default:
462 			break;
463 		}
464 
465 		if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
466 			/* remove the ifn, possibly freeing it */
467 			sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
468 		} else {
469 			/* re-register address family type, if needed */
470 			if ((sctp_ifap->ifn_p->num_v6 == 0) &&
471 			    (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
472 				SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
473 				SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
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_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
478 				SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
479 				sctp_ifap->ifn_p->registered_af = AF_INET6;
480 			}
481 			/* free the ifn refcount */
482 			sctp_free_ifn(sctp_ifap->ifn_p);
483 		}
484 		sctp_ifap->ifn_p = NULL;
485 	}
486 }
487 
488 
489 struct sctp_ifa *
490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
491     uint32_t ifn_type, const char *if_name, void *ifa,
492     struct sockaddr *addr, uint32_t ifa_flags,
493     int dynamic_add)
494 {
495 	struct sctp_vrf *vrf;
496 	struct sctp_ifn *sctp_ifnp = NULL;
497 	struct sctp_ifa *sctp_ifap = NULL;
498 	struct sctp_ifalist *hash_addr_head;
499 	struct sctp_ifnlist *hash_ifn_head;
500 	uint32_t hash_of_addr;
501 	int new_ifn_af = 0;
502 
503 #ifdef SCTP_DEBUG
504 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
505 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
506 #endif
507 	SCTP_IPI_ADDR_WLOCK();
508 	sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
509 	if (sctp_ifnp) {
510 		vrf = sctp_ifnp->vrf;
511 	} else {
512 		vrf = sctp_find_vrf(vrf_id);
513 		if (vrf == NULL) {
514 			vrf = sctp_allocate_vrf(vrf_id);
515 			if (vrf == NULL) {
516 				SCTP_IPI_ADDR_WUNLOCK();
517 				return (NULL);
518 			}
519 		}
520 	}
521 	if (sctp_ifnp == NULL) {
522 		/*
523 		 * build one and add it, can't hold lock until after malloc
524 		 * done though.
525 		 */
526 		SCTP_IPI_ADDR_WUNLOCK();
527 		SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
528 		    sizeof(struct sctp_ifn), SCTP_M_IFN);
529 		if (sctp_ifnp == NULL) {
530 #ifdef INVARIANTS
531 			panic("No memory for IFN");
532 #endif
533 			return (NULL);
534 		}
535 		memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
536 		sctp_ifnp->ifn_index = ifn_index;
537 		sctp_ifnp->ifn_p = ifn;
538 		sctp_ifnp->ifn_type = ifn_type;
539 		sctp_ifnp->refcount = 0;
540 		sctp_ifnp->vrf = vrf;
541 		atomic_add_int(&vrf->refcount, 1);
542 		sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
543 		if (if_name != NULL) {
544 			snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
545 		} else {
546 			snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
547 		}
548 		hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
549 		LIST_INIT(&sctp_ifnp->ifalist);
550 		SCTP_IPI_ADDR_WLOCK();
551 		LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
552 		LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
553 		atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
554 		new_ifn_af = 1;
555 	}
556 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
557 	if (sctp_ifap) {
558 		/* Hmm, it already exists? */
559 		if ((sctp_ifap->ifn_p) &&
560 		    (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
561 			SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
562 			    sctp_ifap->ifn_p->ifn_name, ifn_index,
563 			    (void *)sctp_ifap);
564 			if (new_ifn_af) {
565 				/* Remove the created one that we don't want */
566 				sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
567 			}
568 			if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
569 				/* easy to solve, just switch back to active */
570 				SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
571 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
572 				sctp_ifap->ifn_p = sctp_ifnp;
573 				atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
574 			}
575 	exit_stage_left:
576 			SCTP_IPI_ADDR_WUNLOCK();
577 			return (sctp_ifap);
578 		} else {
579 			if (sctp_ifap->ifn_p) {
580 				/*
581 				 * The last IFN gets the address, remove the
582 				 * old one
583 				 */
584 				SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
585 				    (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
586 				    sctp_ifap->ifn_p->ifn_index, if_name,
587 				    ifn_index);
588 				/* remove the address from the old ifn */
589 				sctp_remove_ifa_from_ifn(sctp_ifap);
590 				/* move the address over to the new ifn */
591 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
592 				goto exit_stage_left;
593 			} else {
594 				/* repair ifnp which was NULL ? */
595 				sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
596 				SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
597 				    (void *)sctp_ifnp, (void *)sctp_ifap);
598 				sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
599 			}
600 			goto exit_stage_left;
601 		}
602 	}
603 	SCTP_IPI_ADDR_WUNLOCK();
604 	SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
605 	if (sctp_ifap == NULL) {
606 #ifdef INVARIANTS
607 		panic("No memory for IFA");
608 #endif
609 		return (NULL);
610 	}
611 	memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
612 	sctp_ifap->ifn_p = sctp_ifnp;
613 	atomic_add_int(&sctp_ifnp->refcount, 1);
614 	sctp_ifap->vrf_id = vrf_id;
615 	sctp_ifap->ifa = ifa;
616 	memcpy(&sctp_ifap->address, addr, addr->sa_len);
617 	sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
618 	sctp_ifap->flags = ifa_flags;
619 	/* Set scope */
620 	switch (sctp_ifap->address.sa.sa_family) {
621 #ifdef INET
622 	case AF_INET:
623 		{
624 			struct sockaddr_in *sin;
625 
626 			sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
627 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
628 			    (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
629 				sctp_ifap->src_is_loop = 1;
630 			}
631 			if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
632 				sctp_ifap->src_is_priv = 1;
633 			}
634 			sctp_ifnp->num_v4++;
635 			if (new_ifn_af)
636 				new_ifn_af = AF_INET;
637 			break;
638 		}
639 #endif
640 #ifdef INET6
641 	case AF_INET6:
642 		{
643 			/* ok to use deprecated addresses? */
644 			struct sockaddr_in6 *sin6;
645 
646 			sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
647 			if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
648 			    (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
649 				sctp_ifap->src_is_loop = 1;
650 			}
651 			if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
652 				sctp_ifap->src_is_priv = 1;
653 			}
654 			sctp_ifnp->num_v6++;
655 			if (new_ifn_af)
656 				new_ifn_af = AF_INET6;
657 			break;
658 		}
659 #endif
660 	default:
661 		new_ifn_af = 0;
662 		break;
663 	}
664 	hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
665 
666 	if ((sctp_ifap->src_is_priv == 0) &&
667 	    (sctp_ifap->src_is_loop == 0)) {
668 		sctp_ifap->src_is_glob = 1;
669 	}
670 	SCTP_IPI_ADDR_WLOCK();
671 	hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
672 	LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
673 	sctp_ifap->refcount = 1;
674 	LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
675 	sctp_ifnp->ifa_count++;
676 	vrf->total_ifa_count++;
677 	atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
678 	if (new_ifn_af) {
679 		SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
680 		sctp_ifnp->registered_af = new_ifn_af;
681 	}
682 	SCTP_IPI_ADDR_WUNLOCK();
683 	if (dynamic_add) {
684 		/*
685 		 * Bump up the refcount so that when the timer completes it
686 		 * will drop back down.
687 		 */
688 		struct sctp_laddr *wi;
689 
690 		atomic_add_int(&sctp_ifap->refcount, 1);
691 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
692 		if (wi == NULL) {
693 			/*
694 			 * Gak, what can we do? We have lost an address
695 			 * change can you say HOSED?
696 			 */
697 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
698 			/* Opps, must decrement the count */
699 			sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
700 			    if_name);
701 			return (NULL);
702 		}
703 		SCTP_INCR_LADDR_COUNT();
704 		bzero(wi, sizeof(*wi));
705 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
706 		wi->ifa = sctp_ifap;
707 		wi->action = SCTP_ADD_IP_ADDRESS;
708 
709 		SCTP_WQ_ADDR_LOCK();
710 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
711 		SCTP_WQ_ADDR_UNLOCK();
712 
713 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
714 		    (struct sctp_inpcb *)NULL,
715 		    (struct sctp_tcb *)NULL,
716 		    (struct sctp_nets *)NULL);
717 	} else {
718 		/* it's ready for use */
719 		sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
720 	}
721 	return (sctp_ifap);
722 }
723 
724 void
725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
726     uint32_t ifn_index, const char *if_name)
727 {
728 	struct sctp_vrf *vrf;
729 	struct sctp_ifa *sctp_ifap = NULL;
730 
731 	SCTP_IPI_ADDR_WLOCK();
732 	vrf = sctp_find_vrf(vrf_id);
733 	if (vrf == NULL) {
734 		SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
735 		goto out_now;
736 	}
737 #ifdef SCTP_DEBUG
738 	SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
739 	SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
740 #endif
741 	sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
742 	if (sctp_ifap) {
743 		/* Validate the delete */
744 		if (sctp_ifap->ifn_p) {
745 			int valid = 0;
746 
747 			/*-
748 			 * The name has priority over the ifn_index
749 			 * if its given. We do this especially for
750 			 * panda who might recycle indexes fast.
751 			 */
752 			if (if_name) {
753 				if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
754 					/* They match its a correct delete */
755 					valid = 1;
756 				}
757 			}
758 			if (!valid) {
759 				/* last ditch check ifn_index */
760 				if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
761 					valid = 1;
762 				}
763 			}
764 			if (!valid) {
765 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
766 				    ifn_index, ((if_name == NULL) ? "NULL" : if_name));
767 				SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
768 				    sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
769 				SCTP_IPI_ADDR_WUNLOCK();
770 				return;
771 			}
772 		}
773 		SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
774 		sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
775 		/*
776 		 * We don't set the flag. This means that the structure will
777 		 * hang around in EP's that have bound specific to it until
778 		 * they close. This gives us TCP like behavior if someone
779 		 * removes an address (or for that matter adds it right
780 		 * back).
781 		 */
782 		/* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
783 		vrf->total_ifa_count--;
784 		LIST_REMOVE(sctp_ifap, next_bucket);
785 		sctp_remove_ifa_from_ifn(sctp_ifap);
786 	}
787 #ifdef SCTP_DEBUG
788 	else {
789 		SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
790 		    ifn_index);
791 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
792 	}
793 #endif
794 
795 out_now:
796 	SCTP_IPI_ADDR_WUNLOCK();
797 	if (sctp_ifap) {
798 		struct sctp_laddr *wi;
799 
800 		wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
801 		if (wi == NULL) {
802 			/*
803 			 * Gak, what can we do? We have lost an address
804 			 * change can you say HOSED?
805 			 */
806 			SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
807 
808 			/* Oops, must decrement the count */
809 			sctp_free_ifa(sctp_ifap);
810 			return;
811 		}
812 		SCTP_INCR_LADDR_COUNT();
813 		bzero(wi, sizeof(*wi));
814 		(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
815 		wi->ifa = sctp_ifap;
816 		wi->action = SCTP_DEL_IP_ADDRESS;
817 		SCTP_WQ_ADDR_LOCK();
818 		/*
819 		 * Should this really be a tailq? As it is we will process
820 		 * the newest first :-0
821 		 */
822 		LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
823 		SCTP_WQ_ADDR_UNLOCK();
824 
825 		sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
826 		    (struct sctp_inpcb *)NULL,
827 		    (struct sctp_tcb *)NULL,
828 		    (struct sctp_nets *)NULL);
829 	}
830 	return;
831 }
832 
833 
834 static int
835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
836 {
837 	int loopback_scope;
838 
839 #if defined(INET)
840 	int ipv4_local_scope, ipv4_addr_legal;
841 
842 #endif
843 #if defined(INET6)
844 	int local_scope, site_scope, ipv6_addr_legal;
845 
846 #endif
847 	struct sctp_vrf *vrf;
848 	struct sctp_ifn *sctp_ifn;
849 	struct sctp_ifa *sctp_ifa;
850 
851 	loopback_scope = stcb->asoc.scope.loopback_scope;
852 #if defined(INET)
853 	ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
854 	ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
855 #endif
856 #if defined(INET6)
857 	local_scope = stcb->asoc.scope.local_scope;
858 	site_scope = stcb->asoc.scope.site_scope;
859 	ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
860 #endif
861 
862 	SCTP_IPI_ADDR_RLOCK();
863 	vrf = sctp_find_vrf(stcb->asoc.vrf_id);
864 	if (vrf == NULL) {
865 		/* no vrf, no addresses */
866 		SCTP_IPI_ADDR_RUNLOCK();
867 		return (0);
868 	}
869 	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
870 		LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
871 			if ((loopback_scope == 0) &&
872 			    SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
873 				continue;
874 			}
875 			LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
876 				if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
877 				    (!sctp_is_addr_pending(stcb, sctp_ifa))) {
878 					/*
879 					 * We allow pending addresses, where
880 					 * we have sent an asconf-add to be
881 					 * considered valid.
882 					 */
883 					continue;
884 				}
885 				if (sctp_ifa->address.sa.sa_family != to->sa_family) {
886 					continue;
887 				}
888 				switch (sctp_ifa->address.sa.sa_family) {
889 #ifdef INET
890 				case AF_INET:
891 					if (ipv4_addr_legal) {
892 						struct sockaddr_in *sin,
893 						           *rsin;
894 
895 						sin = &sctp_ifa->address.sin;
896 						rsin = (struct sockaddr_in *)to;
897 						if ((ipv4_local_scope == 0) &&
898 						    IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
899 							continue;
900 						}
901 						if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
902 							SCTP_IPI_ADDR_RUNLOCK();
903 							return (1);
904 						}
905 					}
906 					break;
907 #endif
908 #ifdef INET6
909 				case AF_INET6:
910 					if (ipv6_addr_legal) {
911 						struct sockaddr_in6 *sin6,
912 						            *rsin6;
913 
914 						sin6 = &sctp_ifa->address.sin6;
915 						rsin6 = (struct sockaddr_in6 *)to;
916 						if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
917 							if (local_scope == 0)
918 								continue;
919 							if (sin6->sin6_scope_id == 0) {
920 								if (sa6_recoverscope(sin6) != 0)
921 									continue;
922 							}
923 						}
924 						if ((site_scope == 0) &&
925 						    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
926 							continue;
927 						}
928 						if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
929 							SCTP_IPI_ADDR_RUNLOCK();
930 							return (1);
931 						}
932 					}
933 					break;
934 #endif
935 				default:
936 					/* TSNH */
937 					break;
938 				}
939 			}
940 		}
941 	} else {
942 		struct sctp_laddr *laddr;
943 
944 		LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
945 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
946 				SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
947 				continue;
948 			}
949 			if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
950 			    (!sctp_is_addr_pending(stcb, laddr->ifa))) {
951 				/*
952 				 * We allow pending addresses, where we have
953 				 * sent an asconf-add to be considered
954 				 * valid.
955 				 */
956 				continue;
957 			}
958 			if (laddr->ifa->address.sa.sa_family != to->sa_family) {
959 				continue;
960 			}
961 			switch (to->sa_family) {
962 #ifdef INET
963 			case AF_INET:
964 				{
965 					struct sockaddr_in *sin, *rsin;
966 
967 					sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
968 					rsin = (struct sockaddr_in *)to;
969 					if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
970 						SCTP_IPI_ADDR_RUNLOCK();
971 						return (1);
972 					}
973 					break;
974 				}
975 #endif
976 #ifdef INET6
977 			case AF_INET6:
978 				{
979 					struct sockaddr_in6 *sin6, *rsin6;
980 
981 					sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
982 					rsin6 = (struct sockaddr_in6 *)to;
983 					if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
984 						SCTP_IPI_ADDR_RUNLOCK();
985 						return (1);
986 					}
987 					break;
988 				}
989 
990 #endif
991 			default:
992 				/* TSNH */
993 				break;
994 			}
995 
996 		}
997 	}
998 	SCTP_IPI_ADDR_RUNLOCK();
999 	return (0);
1000 }
1001 
1002 
1003 static struct sctp_tcb *
1004 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1005     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1006 {
1007 	/**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1008 	/*
1009 	 * If we support the TCP model, then we must now dig through to see
1010 	 * if we can find our endpoint in the list of tcp ep's.
1011 	 */
1012 	uint16_t lport, rport;
1013 	struct sctppcbhead *ephead;
1014 	struct sctp_inpcb *inp;
1015 	struct sctp_laddr *laddr;
1016 	struct sctp_tcb *stcb;
1017 	struct sctp_nets *net;
1018 
1019 	if ((to == NULL) || (from == NULL)) {
1020 		return (NULL);
1021 	}
1022 	switch (to->sa_family) {
1023 #ifdef INET
1024 	case AF_INET:
1025 		if (from->sa_family == AF_INET) {
1026 			lport = ((struct sockaddr_in *)to)->sin_port;
1027 			rport = ((struct sockaddr_in *)from)->sin_port;
1028 		} else {
1029 			return (NULL);
1030 		}
1031 		break;
1032 #endif
1033 #ifdef INET6
1034 	case AF_INET6:
1035 		if (from->sa_family == AF_INET6) {
1036 			lport = ((struct sockaddr_in6 *)to)->sin6_port;
1037 			rport = ((struct sockaddr_in6 *)from)->sin6_port;
1038 		} else {
1039 			return (NULL);
1040 		}
1041 		break;
1042 #endif
1043 	default:
1044 		return (NULL);
1045 	}
1046 	ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1047 	/*
1048 	 * Ok now for each of the guys in this bucket we must look and see:
1049 	 * - Does the remote port match. - Does there single association's
1050 	 * addresses match this address (to). If so we update p_ep to point
1051 	 * to this ep and return the tcb from it.
1052 	 */
1053 	LIST_FOREACH(inp, ephead, sctp_hash) {
1054 		SCTP_INP_RLOCK(inp);
1055 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1056 			SCTP_INP_RUNLOCK(inp);
1057 			continue;
1058 		}
1059 		if (lport != inp->sctp_lport) {
1060 			SCTP_INP_RUNLOCK(inp);
1061 			continue;
1062 		}
1063 		if (inp->def_vrf_id != vrf_id) {
1064 			SCTP_INP_RUNLOCK(inp);
1065 			continue;
1066 		}
1067 		/* check to see if the ep has one of the addresses */
1068 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1069 			/* We are NOT bound all, so look further */
1070 			int match = 0;
1071 
1072 			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1073 
1074 				if (laddr->ifa == NULL) {
1075 					SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
1076 					continue;
1077 				}
1078 				if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1079 					SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1080 					continue;
1081 				}
1082 				if (laddr->ifa->address.sa.sa_family ==
1083 				    to->sa_family) {
1084 					/* see if it matches */
1085 #ifdef INET
1086 					if (from->sa_family == AF_INET) {
1087 						struct sockaddr_in *intf_addr,
1088 						           *sin;
1089 
1090 						intf_addr = &laddr->ifa->address.sin;
1091 						sin = (struct sockaddr_in *)to;
1092 						if (sin->sin_addr.s_addr ==
1093 						    intf_addr->sin_addr.s_addr) {
1094 							match = 1;
1095 							break;
1096 						}
1097 					}
1098 #endif
1099 #ifdef INET6
1100 					if (from->sa_family == AF_INET6) {
1101 						struct sockaddr_in6 *intf_addr6;
1102 						struct sockaddr_in6 *sin6;
1103 
1104 						sin6 = (struct sockaddr_in6 *)
1105 						    to;
1106 						intf_addr6 = &laddr->ifa->address.sin6;
1107 
1108 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1109 						    intf_addr6)) {
1110 							match = 1;
1111 							break;
1112 						}
1113 					}
1114 #endif
1115 				}
1116 			}
1117 			if (match == 0) {
1118 				/* This endpoint does not have this address */
1119 				SCTP_INP_RUNLOCK(inp);
1120 				continue;
1121 			}
1122 		}
1123 		/*
1124 		 * Ok if we hit here the ep has the address, does it hold
1125 		 * the tcb?
1126 		 */
1127 		/* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1128 		stcb = LIST_FIRST(&inp->sctp_asoc_list);
1129 		if (stcb == NULL) {
1130 			SCTP_INP_RUNLOCK(inp);
1131 			continue;
1132 		}
1133 		SCTP_TCB_LOCK(stcb);
1134 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1135 			SCTP_TCB_UNLOCK(stcb);
1136 			SCTP_INP_RUNLOCK(inp);
1137 			continue;
1138 		}
1139 		if (stcb->rport != rport) {
1140 			/* remote port does not match. */
1141 			SCTP_TCB_UNLOCK(stcb);
1142 			SCTP_INP_RUNLOCK(inp);
1143 			continue;
1144 		}
1145 		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1146 			SCTP_TCB_UNLOCK(stcb);
1147 			SCTP_INP_RUNLOCK(inp);
1148 			continue;
1149 		}
1150 		if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1151 			SCTP_TCB_UNLOCK(stcb);
1152 			SCTP_INP_RUNLOCK(inp);
1153 			continue;
1154 		}
1155 		/* Does this TCB have a matching address? */
1156 		TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1157 
1158 			if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1159 				/* not the same family, can't be a match */
1160 				continue;
1161 			}
1162 			switch (from->sa_family) {
1163 #ifdef INET
1164 			case AF_INET:
1165 				{
1166 					struct sockaddr_in *sin, *rsin;
1167 
1168 					sin = (struct sockaddr_in *)&net->ro._l_addr;
1169 					rsin = (struct sockaddr_in *)from;
1170 					if (sin->sin_addr.s_addr ==
1171 					    rsin->sin_addr.s_addr) {
1172 						/* found it */
1173 						if (netp != NULL) {
1174 							*netp = net;
1175 						}
1176 						/*
1177 						 * Update the endpoint
1178 						 * pointer
1179 						 */
1180 						*inp_p = inp;
1181 						SCTP_INP_RUNLOCK(inp);
1182 						return (stcb);
1183 					}
1184 					break;
1185 				}
1186 #endif
1187 #ifdef INET6
1188 			case AF_INET6:
1189 				{
1190 					struct sockaddr_in6 *sin6, *rsin6;
1191 
1192 					sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1193 					rsin6 = (struct sockaddr_in6 *)from;
1194 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1195 					    rsin6)) {
1196 						/* found it */
1197 						if (netp != NULL) {
1198 							*netp = net;
1199 						}
1200 						/*
1201 						 * Update the endpoint
1202 						 * pointer
1203 						 */
1204 						*inp_p = inp;
1205 						SCTP_INP_RUNLOCK(inp);
1206 						return (stcb);
1207 					}
1208 					break;
1209 				}
1210 #endif
1211 			default:
1212 				/* TSNH */
1213 				break;
1214 			}
1215 		}
1216 		SCTP_TCB_UNLOCK(stcb);
1217 		SCTP_INP_RUNLOCK(inp);
1218 	}
1219 	return (NULL);
1220 }
1221 
1222 
1223 /*
1224  * rules for use
1225  *
1226  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1227  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1228  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1229  * NULL.
1230  */
1231 
1232 struct sctp_tcb *
1233 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1234     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1235 {
1236 	struct sctpasochead *head;
1237 	struct sctp_inpcb *inp;
1238 	struct sctp_tcb *stcb = NULL;
1239 	struct sctp_nets *net;
1240 	uint16_t rport;
1241 
1242 	inp = *inp_p;
1243 	switch (remote->sa_family) {
1244 #ifdef INET
1245 	case AF_INET:
1246 		rport = (((struct sockaddr_in *)remote)->sin_port);
1247 		break;
1248 #endif
1249 #ifdef INET6
1250 	case AF_INET6:
1251 		rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1252 		break;
1253 #endif
1254 	default:
1255 		return (NULL);
1256 	}
1257 	if (locked_tcb) {
1258 		/*
1259 		 * UN-lock so we can do proper locking here this occurs when
1260 		 * called from load_addresses_from_init.
1261 		 */
1262 		atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1263 		SCTP_TCB_UNLOCK(locked_tcb);
1264 	}
1265 	SCTP_INP_INFO_RLOCK();
1266 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1267 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1268 		/*-
1269 		 * Now either this guy is our listener or it's the
1270 		 * connector. If it is the one that issued the connect, then
1271 		 * it's only chance is to be the first TCB in the list. If
1272 		 * it is the acceptor, then do the special_lookup to hash
1273 		 * and find the real inp.
1274 		 */
1275 		if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1276 			/* to is peer addr, from is my addr */
1277 			stcb = sctp_tcb_special_locate(inp_p, remote, local,
1278 			    netp, inp->def_vrf_id);
1279 			if ((stcb != NULL) && (locked_tcb == NULL)) {
1280 				/* we have a locked tcb, lower refcount */
1281 				SCTP_INP_DECR_REF(inp);
1282 			}
1283 			if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1284 				SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1285 				SCTP_TCB_LOCK(locked_tcb);
1286 				atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1287 				SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1288 			}
1289 			SCTP_INP_INFO_RUNLOCK();
1290 			return (stcb);
1291 		} else {
1292 			SCTP_INP_WLOCK(inp);
1293 			if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1294 				goto null_return;
1295 			}
1296 			stcb = LIST_FIRST(&inp->sctp_asoc_list);
1297 			if (stcb == NULL) {
1298 				goto null_return;
1299 			}
1300 			SCTP_TCB_LOCK(stcb);
1301 
1302 			if (stcb->rport != rport) {
1303 				/* remote port does not match. */
1304 				SCTP_TCB_UNLOCK(stcb);
1305 				goto null_return;
1306 			}
1307 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1308 				SCTP_TCB_UNLOCK(stcb);
1309 				goto null_return;
1310 			}
1311 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1312 				SCTP_TCB_UNLOCK(stcb);
1313 				goto null_return;
1314 			}
1315 			/* now look at the list of remote addresses */
1316 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1317 #ifdef INVARIANTS
1318 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1319 					panic("Corrupt net list");
1320 				}
1321 #endif
1322 				if (net->ro._l_addr.sa.sa_family !=
1323 				    remote->sa_family) {
1324 					/* not the same family */
1325 					continue;
1326 				}
1327 				switch (remote->sa_family) {
1328 #ifdef INET
1329 				case AF_INET:
1330 					{
1331 						struct sockaddr_in *sin,
1332 						           *rsin;
1333 
1334 						sin = (struct sockaddr_in *)
1335 						    &net->ro._l_addr;
1336 						rsin = (struct sockaddr_in *)remote;
1337 						if (sin->sin_addr.s_addr ==
1338 						    rsin->sin_addr.s_addr) {
1339 							/* found it */
1340 							if (netp != NULL) {
1341 								*netp = net;
1342 							}
1343 							if (locked_tcb == NULL) {
1344 								SCTP_INP_DECR_REF(inp);
1345 							} else if (locked_tcb != stcb) {
1346 								SCTP_TCB_LOCK(locked_tcb);
1347 							}
1348 							if (locked_tcb) {
1349 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1350 							}
1351 							SCTP_INP_WUNLOCK(inp);
1352 							SCTP_INP_INFO_RUNLOCK();
1353 							return (stcb);
1354 						}
1355 						break;
1356 					}
1357 #endif
1358 #ifdef INET6
1359 				case AF_INET6:
1360 					{
1361 						struct sockaddr_in6 *sin6,
1362 						            *rsin6;
1363 
1364 						sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1365 						rsin6 = (struct sockaddr_in6 *)remote;
1366 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1367 						    rsin6)) {
1368 							/* found it */
1369 							if (netp != NULL) {
1370 								*netp = net;
1371 							}
1372 							if (locked_tcb == NULL) {
1373 								SCTP_INP_DECR_REF(inp);
1374 							} else if (locked_tcb != stcb) {
1375 								SCTP_TCB_LOCK(locked_tcb);
1376 							}
1377 							if (locked_tcb) {
1378 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1379 							}
1380 							SCTP_INP_WUNLOCK(inp);
1381 							SCTP_INP_INFO_RUNLOCK();
1382 							return (stcb);
1383 						}
1384 						break;
1385 					}
1386 #endif
1387 				default:
1388 					/* TSNH */
1389 					break;
1390 				}
1391 			}
1392 			SCTP_TCB_UNLOCK(stcb);
1393 		}
1394 	} else {
1395 		SCTP_INP_WLOCK(inp);
1396 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1397 			goto null_return;
1398 		}
1399 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1400 		    inp->sctp_hashmark)];
1401 		if (head == NULL) {
1402 			goto null_return;
1403 		}
1404 		LIST_FOREACH(stcb, head, sctp_tcbhash) {
1405 			if (stcb->rport != rport) {
1406 				/* remote port does not match */
1407 				continue;
1408 			}
1409 			SCTP_TCB_LOCK(stcb);
1410 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1411 				SCTP_TCB_UNLOCK(stcb);
1412 				continue;
1413 			}
1414 			if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1415 				SCTP_TCB_UNLOCK(stcb);
1416 				continue;
1417 			}
1418 			/* now look at the list of remote addresses */
1419 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1420 #ifdef INVARIANTS
1421 				if (net == (TAILQ_NEXT(net, sctp_next))) {
1422 					panic("Corrupt net list");
1423 				}
1424 #endif
1425 				if (net->ro._l_addr.sa.sa_family !=
1426 				    remote->sa_family) {
1427 					/* not the same family */
1428 					continue;
1429 				}
1430 				switch (remote->sa_family) {
1431 #ifdef INET
1432 				case AF_INET:
1433 					{
1434 						struct sockaddr_in *sin,
1435 						           *rsin;
1436 
1437 						sin = (struct sockaddr_in *)
1438 						    &net->ro._l_addr;
1439 						rsin = (struct sockaddr_in *)remote;
1440 						if (sin->sin_addr.s_addr ==
1441 						    rsin->sin_addr.s_addr) {
1442 							/* found it */
1443 							if (netp != NULL) {
1444 								*netp = net;
1445 							}
1446 							if (locked_tcb == NULL) {
1447 								SCTP_INP_DECR_REF(inp);
1448 							} else if (locked_tcb != stcb) {
1449 								SCTP_TCB_LOCK(locked_tcb);
1450 							}
1451 							if (locked_tcb) {
1452 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1453 							}
1454 							SCTP_INP_WUNLOCK(inp);
1455 							SCTP_INP_INFO_RUNLOCK();
1456 							return (stcb);
1457 						}
1458 						break;
1459 					}
1460 #endif
1461 #ifdef INET6
1462 				case AF_INET6:
1463 					{
1464 						struct sockaddr_in6 *sin6,
1465 						            *rsin6;
1466 
1467 						sin6 = (struct sockaddr_in6 *)
1468 						    &net->ro._l_addr;
1469 						rsin6 = (struct sockaddr_in6 *)remote;
1470 						if (SCTP6_ARE_ADDR_EQUAL(sin6,
1471 						    rsin6)) {
1472 							/* found it */
1473 							if (netp != NULL) {
1474 								*netp = net;
1475 							}
1476 							if (locked_tcb == NULL) {
1477 								SCTP_INP_DECR_REF(inp);
1478 							} else if (locked_tcb != stcb) {
1479 								SCTP_TCB_LOCK(locked_tcb);
1480 							}
1481 							if (locked_tcb) {
1482 								atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1483 							}
1484 							SCTP_INP_WUNLOCK(inp);
1485 							SCTP_INP_INFO_RUNLOCK();
1486 							return (stcb);
1487 						}
1488 						break;
1489 					}
1490 #endif
1491 				default:
1492 					/* TSNH */
1493 					break;
1494 				}
1495 			}
1496 			SCTP_TCB_UNLOCK(stcb);
1497 		}
1498 	}
1499 null_return:
1500 	/* clean up for returning null */
1501 	if (locked_tcb) {
1502 		SCTP_TCB_LOCK(locked_tcb);
1503 		atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1504 	}
1505 	SCTP_INP_WUNLOCK(inp);
1506 	SCTP_INP_INFO_RUNLOCK();
1507 	/* not found */
1508 	return (NULL);
1509 }
1510 
1511 
1512 /*
1513  * Find an association for a specific endpoint using the association id given
1514  * out in the COMM_UP notification
1515  */
1516 struct sctp_tcb *
1517 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1518 {
1519 	/*
1520 	 * Use my the assoc_id to find a endpoint
1521 	 */
1522 	struct sctpasochead *head;
1523 	struct sctp_tcb *stcb;
1524 	uint32_t id;
1525 
1526 	if (inp == NULL) {
1527 		SCTP_PRINTF("TSNH ep_associd\n");
1528 		return (NULL);
1529 	}
1530 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1531 		SCTP_PRINTF("TSNH ep_associd0\n");
1532 		return (NULL);
1533 	}
1534 	id = (uint32_t) asoc_id;
1535 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1536 	if (head == NULL) {
1537 		/* invalid id TSNH */
1538 		SCTP_PRINTF("TSNH ep_associd1\n");
1539 		return (NULL);
1540 	}
1541 	LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1542 		if (stcb->asoc.assoc_id == id) {
1543 			if (inp != stcb->sctp_ep) {
1544 				/*
1545 				 * some other guy has the same id active (id
1546 				 * collision ??).
1547 				 */
1548 				SCTP_PRINTF("TSNH ep_associd2\n");
1549 				continue;
1550 			}
1551 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1552 				continue;
1553 			}
1554 			if (want_lock) {
1555 				SCTP_TCB_LOCK(stcb);
1556 			}
1557 			return (stcb);
1558 		}
1559 	}
1560 	return (NULL);
1561 }
1562 
1563 
1564 struct sctp_tcb *
1565 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1566 {
1567 	struct sctp_tcb *stcb;
1568 
1569 	SCTP_INP_RLOCK(inp);
1570 	stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1571 	SCTP_INP_RUNLOCK(inp);
1572 	return (stcb);
1573 }
1574 
1575 
1576 /*
1577  * Endpoint probe expects that the INP_INFO is locked.
1578  */
1579 static struct sctp_inpcb *
1580 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1581     uint16_t lport, uint32_t vrf_id)
1582 {
1583 	struct sctp_inpcb *inp;
1584 	struct sctp_laddr *laddr;
1585 
1586 #ifdef INET
1587 	struct sockaddr_in *sin;
1588 
1589 #endif
1590 #ifdef INET6
1591 	struct sockaddr_in6 *sin6;
1592 	struct sockaddr_in6 *intf_addr6;
1593 
1594 #endif
1595 	int fnd;
1596 
1597 #ifdef INET
1598 	sin = NULL;
1599 #endif
1600 #ifdef INET6
1601 	sin6 = NULL;
1602 #endif
1603 	switch (nam->sa_family) {
1604 #ifdef INET
1605 	case AF_INET:
1606 		sin = (struct sockaddr_in *)nam;
1607 		break;
1608 #endif
1609 #ifdef INET6
1610 	case AF_INET6:
1611 		sin6 = (struct sockaddr_in6 *)nam;
1612 		break;
1613 #endif
1614 	default:
1615 		/* unsupported family */
1616 		return (NULL);
1617 	}
1618 
1619 	if (head == NULL)
1620 		return (NULL);
1621 
1622 	LIST_FOREACH(inp, head, sctp_hash) {
1623 		SCTP_INP_RLOCK(inp);
1624 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1625 			SCTP_INP_RUNLOCK(inp);
1626 			continue;
1627 		}
1628 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1629 		    (inp->sctp_lport == lport)) {
1630 			/* got it */
1631 #ifdef INET
1632 			if ((nam->sa_family == AF_INET) &&
1633 			    (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1634 			    SCTP_IPV6_V6ONLY(inp)) {
1635 				/* IPv4 on a IPv6 socket with ONLY IPv6 set */
1636 				SCTP_INP_RUNLOCK(inp);
1637 				continue;
1638 			}
1639 #endif
1640 #ifdef INET6
1641 			/* A V6 address and the endpoint is NOT bound V6 */
1642 			if (nam->sa_family == AF_INET6 &&
1643 			    (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1644 				SCTP_INP_RUNLOCK(inp);
1645 				continue;
1646 			}
1647 #endif
1648 			/* does a VRF id match? */
1649 			fnd = 0;
1650 			if (inp->def_vrf_id == vrf_id)
1651 				fnd = 1;
1652 
1653 			SCTP_INP_RUNLOCK(inp);
1654 			if (!fnd)
1655 				continue;
1656 			return (inp);
1657 		}
1658 		SCTP_INP_RUNLOCK(inp);
1659 	}
1660 	switch (nam->sa_family) {
1661 #ifdef INET
1662 	case AF_INET:
1663 		if (sin->sin_addr.s_addr == INADDR_ANY) {
1664 			/* Can't hunt for one that has no address specified */
1665 			return (NULL);
1666 		}
1667 		break;
1668 #endif
1669 #ifdef INET6
1670 	case AF_INET6:
1671 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1672 			/* Can't hunt for one that has no address specified */
1673 			return (NULL);
1674 		}
1675 		break;
1676 #endif
1677 	default:
1678 		break;
1679 	}
1680 	/*
1681 	 * ok, not bound to all so see if we can find a EP bound to this
1682 	 * address.
1683 	 */
1684 	LIST_FOREACH(inp, head, sctp_hash) {
1685 		SCTP_INP_RLOCK(inp);
1686 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1687 			SCTP_INP_RUNLOCK(inp);
1688 			continue;
1689 		}
1690 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1691 			SCTP_INP_RUNLOCK(inp);
1692 			continue;
1693 		}
1694 		/*
1695 		 * Ok this could be a likely candidate, look at all of its
1696 		 * addresses
1697 		 */
1698 		if (inp->sctp_lport != lport) {
1699 			SCTP_INP_RUNLOCK(inp);
1700 			continue;
1701 		}
1702 		/* does a VRF id match? */
1703 		fnd = 0;
1704 		if (inp->def_vrf_id == vrf_id)
1705 			fnd = 1;
1706 
1707 		if (!fnd) {
1708 			SCTP_INP_RUNLOCK(inp);
1709 			continue;
1710 		}
1711 		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1712 			if (laddr->ifa == NULL) {
1713 				SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1714 				    __FUNCTION__);
1715 				continue;
1716 			}
1717 			SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1718 			    (void *)laddr->ifa);
1719 			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1720 				SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1721 				continue;
1722 			}
1723 			if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1724 				/* possible, see if it matches */
1725 				switch (nam->sa_family) {
1726 #ifdef INET
1727 				case AF_INET:
1728 					if (sin->sin_addr.s_addr ==
1729 					    laddr->ifa->address.sin.sin_addr.s_addr) {
1730 						SCTP_INP_RUNLOCK(inp);
1731 						return (inp);
1732 					}
1733 					break;
1734 #endif
1735 #ifdef INET6
1736 				case AF_INET6:
1737 					intf_addr6 = &laddr->ifa->address.sin6;
1738 					if (SCTP6_ARE_ADDR_EQUAL(sin6,
1739 					    intf_addr6)) {
1740 						SCTP_INP_RUNLOCK(inp);
1741 						return (inp);
1742 					}
1743 					break;
1744 #endif
1745 				}
1746 			}
1747 		}
1748 		SCTP_INP_RUNLOCK(inp);
1749 	}
1750 	return (NULL);
1751 }
1752 
1753 
1754 static struct sctp_inpcb *
1755 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1756 {
1757 	struct sctppcbhead *head;
1758 	struct sctp_inpcb *t_inp;
1759 	int fnd;
1760 
1761 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1762 	    SCTP_BASE_INFO(hashmark))];
1763 	LIST_FOREACH(t_inp, head, sctp_hash) {
1764 		if (t_inp->sctp_lport != lport) {
1765 			continue;
1766 		}
1767 		/* is it in the VRF in question */
1768 		fnd = 0;
1769 		if (t_inp->def_vrf_id == vrf_id)
1770 			fnd = 1;
1771 		if (!fnd)
1772 			continue;
1773 
1774 		/* This one is in use. */
1775 		/* check the v6/v4 binding issue */
1776 		if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1777 		    SCTP_IPV6_V6ONLY(t_inp)) {
1778 			if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1779 				/* collision in V6 space */
1780 				return (t_inp);
1781 			} else {
1782 				/* inp is BOUND_V4 no conflict */
1783 				continue;
1784 			}
1785 		} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1786 			/* t_inp is bound v4 and v6, conflict always */
1787 			return (t_inp);
1788 		} else {
1789 			/* t_inp is bound only V4 */
1790 			if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1791 			    SCTP_IPV6_V6ONLY(inp)) {
1792 				/* no conflict */
1793 				continue;
1794 			}
1795 			/* else fall through to conflict */
1796 		}
1797 		return (t_inp);
1798 	}
1799 	return (NULL);
1800 }
1801 
1802 
1803 int
1804 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1805 {
1806 	/* For 1-2-1 with port reuse */
1807 	struct sctppcbhead *head;
1808 	struct sctp_inpcb *tinp;
1809 
1810 	if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1811 		/* only works with port reuse on */
1812 		return (-1);
1813 	}
1814 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1815 		return (0);
1816 	}
1817 	SCTP_INP_RUNLOCK(inp);
1818 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1819 	    SCTP_BASE_INFO(hashmark))];
1820 	/* Kick out all non-listeners to the TCP hash */
1821 	LIST_FOREACH(tinp, head, sctp_hash) {
1822 		if (tinp->sctp_lport != inp->sctp_lport) {
1823 			continue;
1824 		}
1825 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1826 			continue;
1827 		}
1828 		if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1829 			continue;
1830 		}
1831 		if (tinp->sctp_socket->so_qlimit) {
1832 			continue;
1833 		}
1834 		SCTP_INP_WLOCK(tinp);
1835 		LIST_REMOVE(tinp, sctp_hash);
1836 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1837 		tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1838 		LIST_INSERT_HEAD(head, tinp, sctp_hash);
1839 		SCTP_INP_WUNLOCK(tinp);
1840 	}
1841 	SCTP_INP_WLOCK(inp);
1842 	/* Pull from where he was */
1843 	LIST_REMOVE(inp, sctp_hash);
1844 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1845 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1846 	LIST_INSERT_HEAD(head, inp, sctp_hash);
1847 	SCTP_INP_WUNLOCK(inp);
1848 	SCTP_INP_RLOCK(inp);
1849 	return (0);
1850 }
1851 
1852 
1853 struct sctp_inpcb *
1854 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1855     uint32_t vrf_id)
1856 {
1857 	/*
1858 	 * First we check the hash table to see if someone has this port
1859 	 * bound with just the port.
1860 	 */
1861 	struct sctp_inpcb *inp;
1862 	struct sctppcbhead *head;
1863 	int lport;
1864 	unsigned int i;
1865 
1866 #ifdef INET
1867 	struct sockaddr_in *sin;
1868 
1869 #endif
1870 #ifdef INET6
1871 	struct sockaddr_in6 *sin6;
1872 
1873 #endif
1874 
1875 	switch (nam->sa_family) {
1876 #ifdef INET
1877 	case AF_INET:
1878 		sin = (struct sockaddr_in *)nam;
1879 		lport = sin->sin_port;
1880 		break;
1881 #endif
1882 #ifdef INET6
1883 	case AF_INET6:
1884 		sin6 = (struct sockaddr_in6 *)nam;
1885 		lport = sin6->sin6_port;
1886 		break;
1887 #endif
1888 	default:
1889 		return (NULL);
1890 	}
1891 	/*
1892 	 * I could cheat here and just cast to one of the types but we will
1893 	 * do it right. It also provides the check against an Unsupported
1894 	 * type too.
1895 	 */
1896 	/* Find the head of the ALLADDR chain */
1897 	if (have_lock == 0) {
1898 		SCTP_INP_INFO_RLOCK();
1899 	}
1900 	head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1901 	    SCTP_BASE_INFO(hashmark))];
1902 	inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1903 
1904 	/*
1905 	 * If the TCP model exists it could be that the main listening
1906 	 * endpoint is gone but there still exists a connected socket for
1907 	 * this guy. If so we can return the first one that we find. This
1908 	 * may NOT be the correct one so the caller should be wary on the
1909 	 * returned INP. Currently the only caller that sets find_tcp_pool
1910 	 * is in bindx where we are verifying that a user CAN bind the
1911 	 * address. He either has bound it already, or someone else has, or
1912 	 * its open to bind, so this is good enough.
1913 	 */
1914 	if (inp == NULL && find_tcp_pool) {
1915 		for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1916 			head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1917 			inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1918 			if (inp) {
1919 				break;
1920 			}
1921 		}
1922 	}
1923 	if (inp) {
1924 		SCTP_INP_INCR_REF(inp);
1925 	}
1926 	if (have_lock == 0) {
1927 		SCTP_INP_INFO_RUNLOCK();
1928 	}
1929 	return (inp);
1930 }
1931 
1932 
1933 /*
1934  * Find an association for an endpoint with the pointer to whom you want to
1935  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1936  * need to change the *to to some other struct like a mbuf...
1937  */
1938 struct sctp_tcb *
1939 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1940     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1941     uint32_t vrf_id)
1942 {
1943 	struct sctp_inpcb *inp = NULL;
1944 	struct sctp_tcb *stcb;
1945 
1946 	SCTP_INP_INFO_RLOCK();
1947 	if (find_tcp_pool) {
1948 		if (inp_p != NULL) {
1949 			stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
1950 			    vrf_id);
1951 		} else {
1952 			stcb = sctp_tcb_special_locate(&inp, from, to, netp,
1953 			    vrf_id);
1954 		}
1955 		if (stcb != NULL) {
1956 			SCTP_INP_INFO_RUNLOCK();
1957 			return (stcb);
1958 		}
1959 	}
1960 	inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1961 	if (inp_p != NULL) {
1962 		*inp_p = inp;
1963 	}
1964 	SCTP_INP_INFO_RUNLOCK();
1965 	if (inp == NULL) {
1966 		return (NULL);
1967 	}
1968 	/*
1969 	 * ok, we have an endpoint, now lets find the assoc for it (if any)
1970 	 * we now place the source address or from in the to of the find
1971 	 * endpoint call. Since in reality this chain is used from the
1972 	 * inbound packet side.
1973 	 */
1974 	if (inp_p != NULL) {
1975 		stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1976 		    NULL);
1977 	} else {
1978 		stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
1979 		    NULL);
1980 	}
1981 	return (stcb);
1982 }
1983 
1984 
1985 /*
1986  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1987  * find all addresses that the sender has specified in any address list. Each
1988  * address will be used to lookup the TCB and see if one exits.
1989  */
1990 static struct sctp_tcb *
1991 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1992     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1993     struct sockaddr *dst)
1994 {
1995 	struct sctp_paramhdr *phdr, parm_buf;
1996 
1997 #if defined(INET) || defined(INET6)
1998 	struct sctp_tcb *stcb;
1999 	uint16_t ptype;
2000 
2001 #endif
2002 	uint16_t plen;
2003 
2004 #ifdef INET
2005 	struct sockaddr_in sin4;
2006 
2007 #endif
2008 #ifdef INET6
2009 	struct sockaddr_in6 sin6;
2010 
2011 #endif
2012 
2013 #ifdef INET
2014 	memset(&sin4, 0, sizeof(sin4));
2015 	sin4.sin_len = sizeof(sin4);
2016 	sin4.sin_family = AF_INET;
2017 	sin4.sin_port = sh->src_port;
2018 #endif
2019 #ifdef INET6
2020 	memset(&sin6, 0, sizeof(sin6));
2021 	sin6.sin6_len = sizeof(sin6);
2022 	sin6.sin6_family = AF_INET6;
2023 	sin6.sin6_port = sh->src_port;
2024 #endif
2025 
2026 	offset += sizeof(struct sctp_init_chunk);
2027 
2028 	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2029 	while (phdr != NULL) {
2030 		/* now we must see if we want the parameter */
2031 #if defined(INET) || defined(INET6)
2032 		ptype = ntohs(phdr->param_type);
2033 #endif
2034 		plen = ntohs(phdr->param_length);
2035 		if (plen == 0) {
2036 			break;
2037 		}
2038 #ifdef INET
2039 		if (ptype == SCTP_IPV4_ADDRESS &&
2040 		    plen == sizeof(struct sctp_ipv4addr_param)) {
2041 			/* Get the rest of the address */
2042 			struct sctp_ipv4addr_param ip4_parm, *p4;
2043 
2044 			phdr = sctp_get_next_param(m, offset,
2045 			    (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2046 			if (phdr == NULL) {
2047 				return (NULL);
2048 			}
2049 			p4 = (struct sctp_ipv4addr_param *)phdr;
2050 			memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2051 			/* look it up */
2052 			stcb = sctp_findassociation_ep_addr(inp_p,
2053 			    (struct sockaddr *)&sin4, netp, dst, NULL);
2054 			if (stcb != NULL) {
2055 				return (stcb);
2056 			}
2057 		}
2058 #endif
2059 #ifdef INET6
2060 		if (ptype == SCTP_IPV6_ADDRESS &&
2061 		    plen == sizeof(struct sctp_ipv6addr_param)) {
2062 			/* Get the rest of the address */
2063 			struct sctp_ipv6addr_param ip6_parm, *p6;
2064 
2065 			phdr = sctp_get_next_param(m, offset,
2066 			    (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2067 			if (phdr == NULL) {
2068 				return (NULL);
2069 			}
2070 			p6 = (struct sctp_ipv6addr_param *)phdr;
2071 			memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2072 			/* look it up */
2073 			stcb = sctp_findassociation_ep_addr(inp_p,
2074 			    (struct sockaddr *)&sin6, netp, dst, NULL);
2075 			if (stcb != NULL) {
2076 				return (stcb);
2077 			}
2078 		}
2079 #endif
2080 		offset += SCTP_SIZE32(plen);
2081 		phdr = sctp_get_next_param(m, offset, &parm_buf,
2082 		    sizeof(parm_buf));
2083 	}
2084 	return (NULL);
2085 }
2086 
2087 static struct sctp_tcb *
2088 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2089     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2090     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2091 {
2092 	/*
2093 	 * Use my vtag to hash. If we find it we then verify the source addr
2094 	 * is in the assoc. If all goes well we save a bit on rec of a
2095 	 * packet.
2096 	 */
2097 	struct sctpasochead *head;
2098 	struct sctp_nets *net;
2099 	struct sctp_tcb *stcb;
2100 
2101 	SCTP_INP_INFO_RLOCK();
2102 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2103 	    SCTP_BASE_INFO(hashasocmark))];
2104 	if (head == NULL) {
2105 		/* invalid vtag */
2106 		SCTP_INP_INFO_RUNLOCK();
2107 		return (NULL);
2108 	}
2109 	LIST_FOREACH(stcb, head, sctp_asocs) {
2110 		SCTP_INP_RLOCK(stcb->sctp_ep);
2111 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2112 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2113 			continue;
2114 		}
2115 		if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2116 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
2117 			continue;
2118 		}
2119 		SCTP_TCB_LOCK(stcb);
2120 		SCTP_INP_RUNLOCK(stcb->sctp_ep);
2121 		if (stcb->asoc.my_vtag == vtag) {
2122 			/* candidate */
2123 			if (stcb->rport != rport) {
2124 				SCTP_TCB_UNLOCK(stcb);
2125 				continue;
2126 			}
2127 			if (stcb->sctp_ep->sctp_lport != lport) {
2128 				SCTP_TCB_UNLOCK(stcb);
2129 				continue;
2130 			}
2131 			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2132 				SCTP_TCB_UNLOCK(stcb);
2133 				continue;
2134 			}
2135 			/* RRS:Need toaddr check here */
2136 			if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2137 				/* Endpoint does not own this address */
2138 				SCTP_TCB_UNLOCK(stcb);
2139 				continue;
2140 			}
2141 			if (remote_tag) {
2142 				/*
2143 				 * If we have both vtags that's all we match
2144 				 * on
2145 				 */
2146 				if (stcb->asoc.peer_vtag == remote_tag) {
2147 					/*
2148 					 * If both tags match we consider it
2149 					 * conclusive and check NO
2150 					 * source/destination addresses
2151 					 */
2152 					goto conclusive;
2153 				}
2154 			}
2155 			if (skip_src_check) {
2156 		conclusive:
2157 				if (from) {
2158 					*netp = sctp_findnet(stcb, from);
2159 				} else {
2160 					*netp = NULL;	/* unknown */
2161 				}
2162 				if (inp_p)
2163 					*inp_p = stcb->sctp_ep;
2164 				SCTP_INP_INFO_RUNLOCK();
2165 				return (stcb);
2166 			}
2167 			net = sctp_findnet(stcb, from);
2168 			if (net) {
2169 				/* yep its him. */
2170 				*netp = net;
2171 				SCTP_STAT_INCR(sctps_vtagexpress);
2172 				*inp_p = stcb->sctp_ep;
2173 				SCTP_INP_INFO_RUNLOCK();
2174 				return (stcb);
2175 			} else {
2176 				/*
2177 				 * not him, this should only happen in rare
2178 				 * cases so I peg it.
2179 				 */
2180 				SCTP_STAT_INCR(sctps_vtagbogus);
2181 			}
2182 		}
2183 		SCTP_TCB_UNLOCK(stcb);
2184 	}
2185 	SCTP_INP_INFO_RUNLOCK();
2186 	return (NULL);
2187 }
2188 
2189 
2190 /*
2191  * Find an association with the pointer to the inbound IP packet. This can be
2192  * a IPv4 or IPv6 packet.
2193  */
2194 struct sctp_tcb *
2195 sctp_findassociation_addr(struct mbuf *m, int offset,
2196     struct sockaddr *src, struct sockaddr *dst,
2197     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2198     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2199 {
2200 	int find_tcp_pool;
2201 	struct sctp_tcb *stcb;
2202 	struct sctp_inpcb *inp;
2203 
2204 	if (sh->v_tag) {
2205 		/* we only go down this path if vtag is non-zero */
2206 		stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2207 		    inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2208 		if (stcb) {
2209 			return (stcb);
2210 		}
2211 	}
2212 	find_tcp_pool = 0;
2213 	if ((ch->chunk_type != SCTP_INITIATION) &&
2214 	    (ch->chunk_type != SCTP_INITIATION_ACK) &&
2215 	    (ch->chunk_type != SCTP_COOKIE_ACK) &&
2216 	    (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2217 		/* Other chunk types go to the tcp pool. */
2218 		find_tcp_pool = 1;
2219 	}
2220 	if (inp_p) {
2221 		stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2222 		    find_tcp_pool, vrf_id);
2223 		inp = *inp_p;
2224 	} else {
2225 		stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2226 		    find_tcp_pool, vrf_id);
2227 	}
2228 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2229 	if (stcb == NULL && inp) {
2230 		/* Found a EP but not this address */
2231 		if ((ch->chunk_type == SCTP_INITIATION) ||
2232 		    (ch->chunk_type == SCTP_INITIATION_ACK)) {
2233 			/*-
2234 			 * special hook, we do NOT return linp or an
2235 			 * association that is linked to an existing
2236 			 * association that is under the TCP pool (i.e. no
2237 			 * listener exists). The endpoint finding routine
2238 			 * will always find a listener before examining the
2239 			 * TCP pool.
2240 			 */
2241 			if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2242 				if (inp_p) {
2243 					*inp_p = NULL;
2244 				}
2245 				return (NULL);
2246 			}
2247 			stcb = sctp_findassociation_special_addr(m,
2248 			    offset, sh, &inp, netp, dst);
2249 			if (inp_p != NULL) {
2250 				*inp_p = inp;
2251 			}
2252 		}
2253 	}
2254 	SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2255 	return (stcb);
2256 }
2257 
2258 /*
2259  * lookup an association by an ASCONF lookup address.
2260  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2261  */
2262 struct sctp_tcb *
2263 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2264     struct sockaddr *dst, struct sctphdr *sh,
2265     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2266 {
2267 	struct sctp_tcb *stcb;
2268 	struct sockaddr_storage remote_store;
2269 	struct sctp_paramhdr parm_buf, *phdr;
2270 	int ptype;
2271 	int zero_address = 0;
2272 
2273 #ifdef INET
2274 	struct sockaddr_in *sin;
2275 
2276 #endif
2277 #ifdef INET6
2278 	struct sockaddr_in6 *sin6;
2279 
2280 #endif
2281 
2282 	memset(&remote_store, 0, sizeof(remote_store));
2283 	phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2284 	    &parm_buf, sizeof(struct sctp_paramhdr));
2285 	if (phdr == NULL) {
2286 		SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2287 		    __FUNCTION__);
2288 		return NULL;
2289 	}
2290 	ptype = (int)((uint32_t) ntohs(phdr->param_type));
2291 	/* get the correlation address */
2292 	switch (ptype) {
2293 #ifdef INET6
2294 	case SCTP_IPV6_ADDRESS:
2295 		{
2296 			/* ipv6 address param */
2297 			struct sctp_ipv6addr_param *p6, p6_buf;
2298 
2299 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2300 				return NULL;
2301 			}
2302 			p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2303 			    offset + sizeof(struct sctp_asconf_chunk),
2304 			    &p6_buf.ph, sizeof(*p6));
2305 			if (p6 == NULL) {
2306 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2307 				    __FUNCTION__);
2308 				return (NULL);
2309 			}
2310 			sin6 = (struct sockaddr_in6 *)&remote_store;
2311 			sin6->sin6_family = AF_INET6;
2312 			sin6->sin6_len = sizeof(*sin6);
2313 			sin6->sin6_port = sh->src_port;
2314 			memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2315 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2316 				zero_address = 1;
2317 			break;
2318 		}
2319 #endif
2320 #ifdef INET
2321 	case SCTP_IPV4_ADDRESS:
2322 		{
2323 			/* ipv4 address param */
2324 			struct sctp_ipv4addr_param *p4, p4_buf;
2325 
2326 			if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2327 				return NULL;
2328 			}
2329 			p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2330 			    offset + sizeof(struct sctp_asconf_chunk),
2331 			    &p4_buf.ph, sizeof(*p4));
2332 			if (p4 == NULL) {
2333 				SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2334 				    __FUNCTION__);
2335 				return (NULL);
2336 			}
2337 			sin = (struct sockaddr_in *)&remote_store;
2338 			sin->sin_family = AF_INET;
2339 			sin->sin_len = sizeof(*sin);
2340 			sin->sin_port = sh->src_port;
2341 			memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2342 			if (sin->sin_addr.s_addr == INADDR_ANY)
2343 				zero_address = 1;
2344 			break;
2345 		}
2346 #endif
2347 	default:
2348 		/* invalid address param type */
2349 		return NULL;
2350 	}
2351 
2352 	if (zero_address) {
2353 		stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2354 		    netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2355 		if (stcb != NULL) {
2356 			SCTP_INP_DECR_REF(*inp_p);
2357 		}
2358 	} else {
2359 		stcb = sctp_findassociation_ep_addr(inp_p,
2360 		    (struct sockaddr *)&remote_store, netp,
2361 		    dst, NULL);
2362 	}
2363 	return (stcb);
2364 }
2365 
2366 
2367 /*
2368  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2369  * addresses. This way if we don't get a bind we by default pick a ephemeral
2370  * port with all addresses bound.
2371  */
2372 int
2373 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2374 {
2375 	/*
2376 	 * we get called when a new endpoint starts up. We need to allocate
2377 	 * the sctp_inpcb structure from the zone and init it. Mark it as
2378 	 * unbound and find a port that we can use as an ephemeral with
2379 	 * INADDR_ANY. If the user binds later no problem we can then add in
2380 	 * the specific addresses. And setup the default parameters for the
2381 	 * EP.
2382 	 */
2383 	int i, error;
2384 	struct sctp_inpcb *inp;
2385 	struct sctp_pcb *m;
2386 	struct timeval time;
2387 	sctp_sharedkey_t *null_key;
2388 
2389 	error = 0;
2390 
2391 	SCTP_INP_INFO_WLOCK();
2392 	inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2393 	if (inp == NULL) {
2394 		SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2395 		SCTP_INP_INFO_WUNLOCK();
2396 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2397 		return (ENOBUFS);
2398 	}
2399 	/* zap it */
2400 	bzero(inp, sizeof(*inp));
2401 
2402 	/* bump generations */
2403 	/* setup socket pointers */
2404 	inp->sctp_socket = so;
2405 	inp->ip_inp.inp.inp_socket = so;
2406 #ifdef INET6
2407 	if (INP_SOCKAF(so) == AF_INET6) {
2408 		if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2409 			inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2410 		}
2411 		if (MODULE_GLOBAL(ip6_v6only)) {
2412 			inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2413 		}
2414 	}
2415 #endif
2416 	inp->sctp_associd_counter = 1;
2417 	inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2418 	inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2419 	inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2420 	inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2421 	/* init the small hash table we use to track asocid <-> tcb */
2422 	inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2423 	if (inp->sctp_asocidhash == NULL) {
2424 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2425 		SCTP_INP_INFO_WUNLOCK();
2426 		return (ENOBUFS);
2427 	}
2428 #ifdef IPSEC
2429 	{
2430 		struct inpcbpolicy *pcb_sp = NULL;
2431 
2432 		error = ipsec_init_policy(so, &pcb_sp);
2433 		/* Arrange to share the policy */
2434 		inp->ip_inp.inp.inp_sp = pcb_sp;
2435 		((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2436 	}
2437 	if (error != 0) {
2438 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2439 		SCTP_INP_INFO_WUNLOCK();
2440 		return error;
2441 	}
2442 #endif				/* IPSEC */
2443 	SCTP_INCR_EP_COUNT();
2444 	inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2445 	SCTP_INP_INFO_WUNLOCK();
2446 
2447 	so->so_pcb = (caddr_t)inp;
2448 
2449 	if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2450 		/* UDP style socket */
2451 		inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2452 		    SCTP_PCB_FLAGS_UNBOUND);
2453 		/* Be sure it is NON-BLOCKING IO for UDP */
2454 		/* SCTP_SET_SO_NBIO(so); */
2455 	} else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2456 		/* TCP style socket */
2457 		inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2458 		    SCTP_PCB_FLAGS_UNBOUND);
2459 		/* Be sure we have blocking IO by default */
2460 		SCTP_CLEAR_SO_NBIO(so);
2461 	} else {
2462 		/*
2463 		 * unsupported socket type (RAW, etc)- in case we missed it
2464 		 * in protosw
2465 		 */
2466 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2467 		so->so_pcb = NULL;
2468 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2469 		return (EOPNOTSUPP);
2470 	}
2471 	if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2472 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2473 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2474 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2475 		sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2476 		sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2477 	} else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2478 		sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2479 		sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2480 	}
2481 	inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2482 	    &inp->sctp_hashmark);
2483 	if (inp->sctp_tcbhash == NULL) {
2484 		SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2485 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2486 		so->so_pcb = NULL;
2487 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2488 		return (ENOBUFS);
2489 	}
2490 	inp->def_vrf_id = vrf_id;
2491 
2492 	SCTP_INP_INFO_WLOCK();
2493 	SCTP_INP_LOCK_INIT(inp);
2494 	INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2495 	SCTP_INP_READ_INIT(inp);
2496 	SCTP_ASOC_CREATE_LOCK_INIT(inp);
2497 	/* lock the new ep */
2498 	SCTP_INP_WLOCK(inp);
2499 
2500 	/* add it to the info area */
2501 	LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2502 	SCTP_INP_INFO_WUNLOCK();
2503 
2504 	TAILQ_INIT(&inp->read_queue);
2505 	LIST_INIT(&inp->sctp_addr_list);
2506 
2507 	LIST_INIT(&inp->sctp_asoc_list);
2508 
2509 #ifdef SCTP_TRACK_FREED_ASOCS
2510 	/* TEMP CODE */
2511 	LIST_INIT(&inp->sctp_asoc_free_list);
2512 #endif
2513 	/* Init the timer structure for signature change */
2514 	SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2515 	inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2516 
2517 	/* now init the actual endpoint default data */
2518 	m = &inp->sctp_ep;
2519 
2520 	/* setup the base timeout information */
2521 	m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);	/* needed ? */
2522 	m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);	/* needed ? */
2523 	m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2524 	m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2525 	m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2526 	m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2527 	m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2528 	/* all max/min max are in ms */
2529 	m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2530 	m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2531 	m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2532 	m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2533 	m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2534 	m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2535 	m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2536 	m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2537 	m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2538 	m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2539 	m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2540 	m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2541 	m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2542 
2543 	m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2544 	m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2545 	m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2546 	/* number of streams to pre-open on a association */
2547 	m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2548 
2549 	/* Add adaptation cookie */
2550 	m->adaptation_layer_indicator = 0;
2551 	m->adaptation_layer_indicator_provided = 0;
2552 
2553 	/* seed random number generator */
2554 	m->random_counter = 1;
2555 	m->store_at = SCTP_SIGNATURE_SIZE;
2556 	SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2557 	sctp_fill_random_store(m);
2558 
2559 	/* Minimum cookie size */
2560 	m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2561 	    sizeof(struct sctp_state_cookie);
2562 	m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2563 
2564 	/* Setup the initial secret */
2565 	(void)SCTP_GETTIME_TIMEVAL(&time);
2566 	m->time_of_secret_change = time.tv_sec;
2567 
2568 	for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2569 		m->secret_key[0][i] = sctp_select_initial_TSN(m);
2570 	}
2571 	sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2572 
2573 	/* How long is a cookie good for ? */
2574 	m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2575 	/*
2576 	 * Initialize authentication parameters
2577 	 */
2578 	m->local_hmacs = sctp_default_supported_hmaclist();
2579 	m->local_auth_chunks = sctp_alloc_chunklist();
2580 	m->default_dscp = 0;
2581 #ifdef INET6
2582 	m->default_flowlabel = 0;
2583 #endif
2584 	m->port = 0;		/* encapsulation disabled by default */
2585 	sctp_auth_set_default_chunks(m->local_auth_chunks);
2586 	LIST_INIT(&m->shared_keys);
2587 	/* add default NULL key as key id 0 */
2588 	null_key = sctp_alloc_sharedkey();
2589 	sctp_insert_sharedkey(&m->shared_keys, null_key);
2590 	SCTP_INP_WUNLOCK(inp);
2591 #ifdef SCTP_LOG_CLOSING
2592 	sctp_log_closing(inp, NULL, 12);
2593 #endif
2594 	return (error);
2595 }
2596 
2597 
2598 void
2599 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2600     struct sctp_tcb *stcb)
2601 {
2602 	struct sctp_nets *net;
2603 	uint16_t lport, rport;
2604 	struct sctppcbhead *head;
2605 	struct sctp_laddr *laddr, *oladdr;
2606 
2607 	atomic_add_int(&stcb->asoc.refcnt, 1);
2608 	SCTP_TCB_UNLOCK(stcb);
2609 	SCTP_INP_INFO_WLOCK();
2610 	SCTP_INP_WLOCK(old_inp);
2611 	SCTP_INP_WLOCK(new_inp);
2612 	SCTP_TCB_LOCK(stcb);
2613 	atomic_subtract_int(&stcb->asoc.refcnt, 1);
2614 
2615 	new_inp->sctp_ep.time_of_secret_change =
2616 	    old_inp->sctp_ep.time_of_secret_change;
2617 	memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2618 	    sizeof(old_inp->sctp_ep.secret_key));
2619 	new_inp->sctp_ep.current_secret_number =
2620 	    old_inp->sctp_ep.current_secret_number;
2621 	new_inp->sctp_ep.last_secret_number =
2622 	    old_inp->sctp_ep.last_secret_number;
2623 	new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2624 
2625 	/* make it so new data pours into the new socket */
2626 	stcb->sctp_socket = new_inp->sctp_socket;
2627 	stcb->sctp_ep = new_inp;
2628 
2629 	/* Copy the port across */
2630 	lport = new_inp->sctp_lport = old_inp->sctp_lport;
2631 	rport = stcb->rport;
2632 	/* Pull the tcb from the old association */
2633 	LIST_REMOVE(stcb, sctp_tcbhash);
2634 	LIST_REMOVE(stcb, sctp_tcblist);
2635 	if (stcb->asoc.in_asocid_hash) {
2636 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
2637 	}
2638 	/* Now insert the new_inp into the TCP connected hash */
2639 	head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2640 
2641 	LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2642 	/* Its safe to access */
2643 	new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2644 
2645 	/* Now move the tcb into the endpoint list */
2646 	LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2647 	/*
2648 	 * Question, do we even need to worry about the ep-hash since we
2649 	 * only have one connection? Probably not :> so lets get rid of it
2650 	 * and not suck up any kernel memory in that.
2651 	 */
2652 	if (stcb->asoc.in_asocid_hash) {
2653 		struct sctpasochead *lhd;
2654 
2655 		lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2656 		    new_inp->hashasocidmark)];
2657 		LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2658 	}
2659 	/* Ok. Let's restart timer. */
2660 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2661 		sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2662 		    stcb, net);
2663 	}
2664 
2665 	SCTP_INP_INFO_WUNLOCK();
2666 	if (new_inp->sctp_tcbhash != NULL) {
2667 		SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2668 		new_inp->sctp_tcbhash = NULL;
2669 	}
2670 	if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2671 		/* Subset bound, so copy in the laddr list from the old_inp */
2672 		LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2673 			laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2674 			if (laddr == NULL) {
2675 				/*
2676 				 * Gak, what can we do? This assoc is really
2677 				 * HOSED. We probably should send an abort
2678 				 * here.
2679 				 */
2680 				SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2681 				continue;
2682 			}
2683 			SCTP_INCR_LADDR_COUNT();
2684 			bzero(laddr, sizeof(*laddr));
2685 			(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2686 			laddr->ifa = oladdr->ifa;
2687 			atomic_add_int(&laddr->ifa->refcount, 1);
2688 			LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2689 			    sctp_nxt_addr);
2690 			new_inp->laddr_count++;
2691 			if (oladdr == stcb->asoc.last_used_address) {
2692 				stcb->asoc.last_used_address = laddr;
2693 			}
2694 		}
2695 	}
2696 	/*
2697 	 * Now any running timers need to be adjusted since we really don't
2698 	 * care if they are running or not just blast in the new_inp into
2699 	 * all of them.
2700 	 */
2701 
2702 	stcb->asoc.dack_timer.ep = (void *)new_inp;
2703 	stcb->asoc.asconf_timer.ep = (void *)new_inp;
2704 	stcb->asoc.strreset_timer.ep = (void *)new_inp;
2705 	stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2706 	stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2707 	stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2708 	stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2709 	/* now what about the nets? */
2710 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2711 		net->pmtu_timer.ep = (void *)new_inp;
2712 		net->hb_timer.ep = (void *)new_inp;
2713 		net->rxt_timer.ep = (void *)new_inp;
2714 	}
2715 	SCTP_INP_WUNLOCK(new_inp);
2716 	SCTP_INP_WUNLOCK(old_inp);
2717 }
2718 
2719 
2720 
2721 
2722 /* sctp_ifap is used to bypass normal local address validation checks */
2723 int
2724 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2725     struct sctp_ifa *sctp_ifap, struct thread *p)
2726 {
2727 	/* bind a ep to a socket address */
2728 	struct sctppcbhead *head;
2729 	struct sctp_inpcb *inp, *inp_tmp;
2730 	struct inpcb *ip_inp;
2731 	int port_reuse_active = 0;
2732 	int bindall;
2733 	uint16_t lport;
2734 	int error;
2735 	uint32_t vrf_id;
2736 
2737 	lport = 0;
2738 	bindall = 1;
2739 	inp = (struct sctp_inpcb *)so->so_pcb;
2740 	ip_inp = (struct inpcb *)so->so_pcb;
2741 #ifdef SCTP_DEBUG
2742 	if (addr) {
2743 		SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2744 		    ntohs(((struct sockaddr_in *)addr)->sin_port));
2745 		SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2746 		SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2747 	}
2748 #endif
2749 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2750 		/* already did a bind, subsequent binds NOT allowed ! */
2751 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2752 		return (EINVAL);
2753 	}
2754 #ifdef INVARIANTS
2755 	if (p == NULL)
2756 		panic("null proc/thread");
2757 #endif
2758 	if (addr != NULL) {
2759 		switch (addr->sa_family) {
2760 #ifdef INET
2761 		case AF_INET:
2762 			{
2763 				struct sockaddr_in *sin;
2764 
2765 				/* IPV6_V6ONLY socket? */
2766 				if (SCTP_IPV6_V6ONLY(ip_inp)) {
2767 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2768 					return (EINVAL);
2769 				}
2770 				if (addr->sa_len != sizeof(*sin)) {
2771 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2772 					return (EINVAL);
2773 				}
2774 				sin = (struct sockaddr_in *)addr;
2775 				lport = sin->sin_port;
2776 				/*
2777 				 * For LOOPBACK the prison_local_ip4() call
2778 				 * will transmute the ip address to the
2779 				 * proper value.
2780 				 */
2781 				if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2782 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2783 					return (error);
2784 				}
2785 				if (sin->sin_addr.s_addr != INADDR_ANY) {
2786 					bindall = 0;
2787 				}
2788 				break;
2789 			}
2790 #endif
2791 #ifdef INET6
2792 		case AF_INET6:
2793 			{
2794 				/*
2795 				 * Only for pure IPv6 Address. (No IPv4
2796 				 * Mapped!)
2797 				 */
2798 				struct sockaddr_in6 *sin6;
2799 
2800 				sin6 = (struct sockaddr_in6 *)addr;
2801 
2802 				if (addr->sa_len != sizeof(*sin6)) {
2803 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2804 					return (EINVAL);
2805 				}
2806 				lport = sin6->sin6_port;
2807 				/*
2808 				 * For LOOPBACK the prison_local_ip6() call
2809 				 * will transmute the ipv6 address to the
2810 				 * proper value.
2811 				 */
2812 				if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2813 				    (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2814 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2815 					return (error);
2816 				}
2817 				if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2818 					bindall = 0;
2819 					/* KAME hack: embed scopeid */
2820 					if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2821 						SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2822 						return (EINVAL);
2823 					}
2824 				}
2825 				/* this must be cleared for ifa_ifwithaddr() */
2826 				sin6->sin6_scope_id = 0;
2827 				break;
2828 			}
2829 #endif
2830 		default:
2831 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2832 			return (EAFNOSUPPORT);
2833 		}
2834 	}
2835 	SCTP_INP_INFO_WLOCK();
2836 	SCTP_INP_WLOCK(inp);
2837 	/* Setup a vrf_id to be the default for the non-bind-all case. */
2838 	vrf_id = inp->def_vrf_id;
2839 
2840 	/* increase our count due to the unlock we do */
2841 	SCTP_INP_INCR_REF(inp);
2842 	if (lport) {
2843 		/*
2844 		 * Did the caller specify a port? if so we must see if an ep
2845 		 * already has this one bound.
2846 		 */
2847 		/* got to be root to get at low ports */
2848 		if (ntohs(lport) < IPPORT_RESERVED) {
2849 			if (p && (error =
2850 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
2851 			    )) {
2852 				SCTP_INP_DECR_REF(inp);
2853 				SCTP_INP_WUNLOCK(inp);
2854 				SCTP_INP_INFO_WUNLOCK();
2855 				return (error);
2856 			}
2857 		}
2858 		SCTP_INP_WUNLOCK(inp);
2859 		if (bindall) {
2860 			vrf_id = inp->def_vrf_id;
2861 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2862 			if (inp_tmp != NULL) {
2863 				/*
2864 				 * lock guy returned and lower count note
2865 				 * that we are not bound so inp_tmp should
2866 				 * NEVER be inp. And it is this inp
2867 				 * (inp_tmp) that gets the reference bump,
2868 				 * so we must lower it.
2869 				 */
2870 				SCTP_INP_DECR_REF(inp_tmp);
2871 				/* unlock info */
2872 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2873 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2874 					/*
2875 					 * Ok, must be one-2-one and
2876 					 * allowing port re-use
2877 					 */
2878 					port_reuse_active = 1;
2879 					goto continue_anyway;
2880 				}
2881 				SCTP_INP_DECR_REF(inp);
2882 				SCTP_INP_INFO_WUNLOCK();
2883 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2884 				return (EADDRINUSE);
2885 			}
2886 		} else {
2887 			inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2888 			if (inp_tmp != NULL) {
2889 				/*
2890 				 * lock guy returned and lower count note
2891 				 * that we are not bound so inp_tmp should
2892 				 * NEVER be inp. And it is this inp
2893 				 * (inp_tmp) that gets the reference bump,
2894 				 * so we must lower it.
2895 				 */
2896 				SCTP_INP_DECR_REF(inp_tmp);
2897 				/* unlock info */
2898 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2899 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2900 					/*
2901 					 * Ok, must be one-2-one and
2902 					 * allowing port re-use
2903 					 */
2904 					port_reuse_active = 1;
2905 					goto continue_anyway;
2906 				}
2907 				SCTP_INP_DECR_REF(inp);
2908 				SCTP_INP_INFO_WUNLOCK();
2909 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2910 				return (EADDRINUSE);
2911 			}
2912 		}
2913 continue_anyway:
2914 		SCTP_INP_WLOCK(inp);
2915 		if (bindall) {
2916 			/* verify that no lport is not used by a singleton */
2917 			if ((port_reuse_active == 0) &&
2918 			    (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2919 				/* Sorry someone already has this one bound */
2920 				if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2921 				    (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2922 					port_reuse_active = 1;
2923 				} else {
2924 					SCTP_INP_DECR_REF(inp);
2925 					SCTP_INP_WUNLOCK(inp);
2926 					SCTP_INP_INFO_WUNLOCK();
2927 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2928 					return (EADDRINUSE);
2929 				}
2930 			}
2931 		}
2932 	} else {
2933 		uint16_t first, last, candidate;
2934 		uint16_t count;
2935 		int done;
2936 
2937 		if (ip_inp->inp_flags & INP_HIGHPORT) {
2938 			first = MODULE_GLOBAL(ipport_hifirstauto);
2939 			last = MODULE_GLOBAL(ipport_hilastauto);
2940 		} else if (ip_inp->inp_flags & INP_LOWPORT) {
2941 			if (p && (error =
2942 			    priv_check(p, PRIV_NETINET_RESERVEDPORT)
2943 			    )) {
2944 				SCTP_INP_DECR_REF(inp);
2945 				SCTP_INP_WUNLOCK(inp);
2946 				SCTP_INP_INFO_WUNLOCK();
2947 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2948 				return (error);
2949 			}
2950 			first = MODULE_GLOBAL(ipport_lowfirstauto);
2951 			last = MODULE_GLOBAL(ipport_lowlastauto);
2952 		} else {
2953 			first = MODULE_GLOBAL(ipport_firstauto);
2954 			last = MODULE_GLOBAL(ipport_lastauto);
2955 		}
2956 		if (first > last) {
2957 			uint16_t temp;
2958 
2959 			temp = first;
2960 			first = last;
2961 			last = temp;
2962 		}
2963 		count = last - first + 1;	/* number of candidates */
2964 		candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2965 
2966 		done = 0;
2967 		while (!done) {
2968 			if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2969 				done = 1;
2970 			}
2971 			if (!done) {
2972 				if (--count == 0) {
2973 					SCTP_INP_DECR_REF(inp);
2974 					SCTP_INP_WUNLOCK(inp);
2975 					SCTP_INP_INFO_WUNLOCK();
2976 					SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2977 					return (EADDRINUSE);
2978 				}
2979 				if (candidate == last)
2980 					candidate = first;
2981 				else
2982 					candidate = candidate + 1;
2983 			}
2984 		}
2985 		lport = htons(candidate);
2986 	}
2987 	SCTP_INP_DECR_REF(inp);
2988 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2989 	    SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2990 		/*
2991 		 * this really should not happen. The guy did a non-blocking
2992 		 * bind and then did a close at the same time.
2993 		 */
2994 		SCTP_INP_WUNLOCK(inp);
2995 		SCTP_INP_INFO_WUNLOCK();
2996 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2997 		return (EINVAL);
2998 	}
2999 	/* ok we look clear to give out this port, so lets setup the binding */
3000 	if (bindall) {
3001 		/* binding to all addresses, so just set in the proper flags */
3002 		inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3003 		/* set the automatic addr changes from kernel flag */
3004 		if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3005 			sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3006 			sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3007 		} else {
3008 			sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3009 			sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3010 		}
3011 		if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3012 			sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3013 		} else {
3014 			sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3015 		}
3016 		/*
3017 		 * set the automatic mobility_base from kernel flag (by
3018 		 * micchie)
3019 		 */
3020 		if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3021 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3022 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3023 		} else {
3024 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3025 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3026 		}
3027 		/*
3028 		 * set the automatic mobility_fasthandoff from kernel flag
3029 		 * (by micchie)
3030 		 */
3031 		if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3032 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3033 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3034 		} else {
3035 			sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3036 			sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3037 		}
3038 	} else {
3039 		/*
3040 		 * bind specific, make sure flags is off and add a new
3041 		 * address structure to the sctp_addr_list inside the ep
3042 		 * structure.
3043 		 *
3044 		 * We will need to allocate one and insert it at the head. The
3045 		 * socketopt call can just insert new addresses in there as
3046 		 * well. It will also have to do the embed scope kame hack
3047 		 * too (before adding).
3048 		 */
3049 		struct sctp_ifa *ifa;
3050 		struct sockaddr_storage store_sa;
3051 
3052 		memset(&store_sa, 0, sizeof(store_sa));
3053 		switch (addr->sa_family) {
3054 #ifdef INET
3055 		case AF_INET:
3056 			{
3057 				struct sockaddr_in *sin;
3058 
3059 				sin = (struct sockaddr_in *)&store_sa;
3060 				memcpy(sin, addr, sizeof(struct sockaddr_in));
3061 				sin->sin_port = 0;
3062 				break;
3063 			}
3064 #endif
3065 #ifdef INET6
3066 		case AF_INET6:
3067 			{
3068 				struct sockaddr_in6 *sin6;
3069 
3070 				sin6 = (struct sockaddr_in6 *)&store_sa;
3071 				memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3072 				sin6->sin6_port = 0;
3073 				break;
3074 			}
3075 #endif
3076 		default:
3077 			break;
3078 		}
3079 		/*
3080 		 * first find the interface with the bound address need to
3081 		 * zero out the port to find the address! yuck! can't do
3082 		 * this earlier since need port for sctp_pcb_findep()
3083 		 */
3084 		if (sctp_ifap != NULL) {
3085 			ifa = sctp_ifap;
3086 		} else {
3087 			/*
3088 			 * Note for BSD we hit here always other O/S's will
3089 			 * pass things in via the sctp_ifap argument
3090 			 * (Panda).
3091 			 */
3092 			ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3093 			    vrf_id, SCTP_ADDR_NOT_LOCKED);
3094 		}
3095 		if (ifa == NULL) {
3096 			/* Can't find an interface with that address */
3097 			SCTP_INP_WUNLOCK(inp);
3098 			SCTP_INP_INFO_WUNLOCK();
3099 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3100 			return (EADDRNOTAVAIL);
3101 		}
3102 #ifdef INET6
3103 		if (addr->sa_family == AF_INET6) {
3104 			/* GAK, more FIXME IFA lock? */
3105 			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3106 				/* Can't bind a non-existent addr. */
3107 				SCTP_INP_WUNLOCK(inp);
3108 				SCTP_INP_INFO_WUNLOCK();
3109 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3110 				return (EINVAL);
3111 			}
3112 		}
3113 #endif
3114 		/* we're not bound all */
3115 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3116 		/* allow bindx() to send ASCONF's for binding changes */
3117 		sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3118 		/* clear automatic addr changes from kernel flag */
3119 		sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3120 
3121 		/* add this address to the endpoint list */
3122 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3123 		if (error != 0) {
3124 			SCTP_INP_WUNLOCK(inp);
3125 			SCTP_INP_INFO_WUNLOCK();
3126 			return (error);
3127 		}
3128 		inp->laddr_count++;
3129 	}
3130 	/* find the bucket */
3131 	if (port_reuse_active) {
3132 		/* Put it into tcp 1-2-1 hash */
3133 		head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3134 		inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3135 	} else {
3136 		head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3137 	}
3138 	/* put it in the bucket */
3139 	LIST_INSERT_HEAD(head, inp, sctp_hash);
3140 	SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3141 	    (void *)head, ntohs(lport), port_reuse_active);
3142 	/* set in the port */
3143 	inp->sctp_lport = lport;
3144 
3145 	/* turn off just the unbound flag */
3146 	inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3147 	SCTP_INP_WUNLOCK(inp);
3148 	SCTP_INP_INFO_WUNLOCK();
3149 	return (0);
3150 }
3151 
3152 
3153 static void
3154 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3155 {
3156 	struct sctp_iterator *it, *nit;
3157 
3158 	/*
3159 	 * We enter with the only the ITERATOR_LOCK in place and a write
3160 	 * lock on the inp_info stuff.
3161 	 */
3162 	it = sctp_it_ctl.cur_it;
3163 	if (it && (it->vn != curvnet)) {
3164 		/* Its not looking at our VNET */
3165 		return;
3166 	}
3167 	if (it && (it->inp == inp)) {
3168 		/*
3169 		 * This is tricky and we hold the iterator lock, but when it
3170 		 * returns and gets the lock (when we release it) the
3171 		 * iterator will try to operate on inp. We need to stop that
3172 		 * from happening. But of course the iterator has a
3173 		 * reference on the stcb and inp. We can mark it and it will
3174 		 * stop.
3175 		 *
3176 		 * If its a single iterator situation, we set the end iterator
3177 		 * flag. Otherwise we set the iterator to go to the next
3178 		 * inp.
3179 		 *
3180 		 */
3181 		if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3182 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3183 		} else {
3184 			sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3185 		}
3186 	}
3187 	/*
3188 	 * Now go through and remove any single reference to our inp that
3189 	 * may be still pending on the list
3190 	 */
3191 	SCTP_IPI_ITERATOR_WQ_LOCK();
3192 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3193 		if (it->vn != curvnet) {
3194 			continue;
3195 		}
3196 		if (it->inp == inp) {
3197 			/* This one points to me is it inp specific? */
3198 			if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3199 				/* Remove and free this one */
3200 				TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3201 				    it, sctp_nxt_itr);
3202 				if (it->function_atend != NULL) {
3203 					(*it->function_atend) (it->pointer, it->val);
3204 				}
3205 				SCTP_FREE(it, SCTP_M_ITER);
3206 			} else {
3207 				it->inp = LIST_NEXT(it->inp, sctp_list);
3208 				if (it->inp) {
3209 					SCTP_INP_INCR_REF(it->inp);
3210 				}
3211 			}
3212 			/*
3213 			 * When its put in the refcnt is incremented so decr
3214 			 * it
3215 			 */
3216 			SCTP_INP_DECR_REF(inp);
3217 		}
3218 	}
3219 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
3220 }
3221 
3222 /* release sctp_inpcb unbind the port */
3223 void
3224 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3225 {
3226 	/*
3227 	 * Here we free a endpoint. We must find it (if it is in the Hash
3228 	 * table) and remove it from there. Then we must also find it in the
3229 	 * overall list and remove it from there. After all removals are
3230 	 * complete then any timer has to be stopped. Then start the actual
3231 	 * freeing. a) Any local lists. b) Any associations. c) The hash of
3232 	 * all associations. d) finally the ep itself.
3233 	 */
3234 	struct sctp_tcb *asoc, *nasoc;
3235 	struct sctp_laddr *laddr, *nladdr;
3236 	struct inpcb *ip_pcb;
3237 	struct socket *so;
3238 	int being_refed = 0;
3239 	struct sctp_queued_to_read *sq, *nsq;
3240 	int cnt;
3241 	sctp_sharedkey_t *shared_key, *nshared_key;
3242 
3243 
3244 #ifdef SCTP_LOG_CLOSING
3245 	sctp_log_closing(inp, NULL, 0);
3246 #endif
3247 	SCTP_ITERATOR_LOCK();
3248 	/* mark any iterators on the list or being processed */
3249 	sctp_iterator_inp_being_freed(inp);
3250 	SCTP_ITERATOR_UNLOCK();
3251 	so = inp->sctp_socket;
3252 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3253 		/* been here before.. eeks.. get out of here */
3254 		SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3255 #ifdef SCTP_LOG_CLOSING
3256 		sctp_log_closing(inp, NULL, 1);
3257 #endif
3258 		return;
3259 	}
3260 	SCTP_ASOC_CREATE_LOCK(inp);
3261 	SCTP_INP_INFO_WLOCK();
3262 
3263 	SCTP_INP_WLOCK(inp);
3264 	if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3265 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3266 		/* socket is gone, so no more wakeups allowed */
3267 		inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3268 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3269 		inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3270 
3271 	}
3272 	/* First time through we have the socket lock, after that no more. */
3273 	sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3274 	    SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3275 
3276 	if (inp->control) {
3277 		sctp_m_freem(inp->control);
3278 		inp->control = NULL;
3279 	}
3280 	if (inp->pkt) {
3281 		sctp_m_freem(inp->pkt);
3282 		inp->pkt = NULL;
3283 	}
3284 	ip_pcb = &inp->ip_inp.inp;	/* we could just cast the main pointer
3285 					 * here but I will be nice :> (i.e.
3286 					 * ip_pcb = ep;) */
3287 	if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3288 		int cnt_in_sd;
3289 
3290 		cnt_in_sd = 0;
3291 		LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3292 			SCTP_TCB_LOCK(asoc);
3293 			if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3294 				/* Skip guys being freed */
3295 				cnt_in_sd++;
3296 				if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3297 					/*
3298 					 * Special case - we did not start a
3299 					 * kill timer on the asoc due to it
3300 					 * was not closed. So go ahead and
3301 					 * start it now.
3302 					 */
3303 					asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3304 					sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3305 				}
3306 				SCTP_TCB_UNLOCK(asoc);
3307 				continue;
3308 			}
3309 			if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3310 			    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3311 			    (asoc->asoc.total_output_queue_size == 0)) {
3312 				/*
3313 				 * If we have data in queue, we don't want
3314 				 * to just free since the app may have done,
3315 				 * send()/close or connect/send/close. And
3316 				 * it wants the data to get across first.
3317 				 */
3318 				/* Just abandon things in the front states */
3319 				if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3320 				    SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3321 					cnt_in_sd++;
3322 				}
3323 				continue;
3324 			}
3325 			/* Disconnect the socket please */
3326 			asoc->sctp_socket = NULL;
3327 			asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3328 			if ((asoc->asoc.size_on_reasm_queue > 0) ||
3329 			    (asoc->asoc.control_pdapi) ||
3330 			    (asoc->asoc.size_on_all_streams > 0) ||
3331 			    (so && (so->so_rcv.sb_cc > 0))) {
3332 				/* Left with Data unread */
3333 				struct mbuf *op_err;
3334 
3335 				op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3336 				asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3337 				sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3338 				SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3339 				if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3340 				    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3341 					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3342 				}
3343 				if (sctp_free_assoc(inp, asoc,
3344 				    SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3345 					cnt_in_sd++;
3346 				}
3347 				continue;
3348 			} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3349 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3350 			    (asoc->asoc.stream_queue_cnt == 0)) {
3351 				if (asoc->asoc.locked_on_sending) {
3352 					goto abort_anyway;
3353 				}
3354 				if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3355 				    (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3356 					struct sctp_nets *netp;
3357 
3358 					/*
3359 					 * there is nothing queued to send,
3360 					 * so I send shutdown
3361 					 */
3362 					if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3363 					    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3364 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3365 					}
3366 					SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3367 					SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3368 					sctp_stop_timers_for_shutdown(asoc);
3369 					if (asoc->asoc.alternate) {
3370 						netp = asoc->asoc.alternate;
3371 					} else {
3372 						netp = asoc->asoc.primary_destination;
3373 					}
3374 					sctp_send_shutdown(asoc, netp);
3375 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3376 					    netp);
3377 					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3378 					    asoc->asoc.primary_destination);
3379 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3380 				}
3381 			} else {
3382 				/* mark into shutdown pending */
3383 				struct sctp_stream_queue_pending *sp;
3384 
3385 				asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3386 				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3387 				    asoc->asoc.primary_destination);
3388 				if (asoc->asoc.locked_on_sending) {
3389 					sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3390 					    sctp_streamhead);
3391 					if (sp == NULL) {
3392 						SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3393 						    (void *)asoc->asoc.locked_on_sending,
3394 						    asoc->asoc.locked_on_sending->stream_no);
3395 					} else {
3396 						if ((sp->length == 0) && (sp->msg_is_complete == 0))
3397 							asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3398 					}
3399 				}
3400 				if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3401 				    TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3402 				    (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3403 					struct mbuf *op_err;
3404 
3405 			abort_anyway:
3406 					op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3407 					asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3408 					sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3409 					SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3410 					if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3411 					    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3412 						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3413 					}
3414 					if (sctp_free_assoc(inp, asoc,
3415 					    SCTP_PCBFREE_NOFORCE,
3416 					    SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3417 						cnt_in_sd++;
3418 					}
3419 					continue;
3420 				} else {
3421 					sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3422 				}
3423 			}
3424 			cnt_in_sd++;
3425 			SCTP_TCB_UNLOCK(asoc);
3426 		}
3427 		/* now is there some left in our SHUTDOWN state? */
3428 		if (cnt_in_sd) {
3429 #ifdef SCTP_LOG_CLOSING
3430 			sctp_log_closing(inp, NULL, 2);
3431 #endif
3432 			inp->sctp_socket = NULL;
3433 			SCTP_INP_WUNLOCK(inp);
3434 			SCTP_ASOC_CREATE_UNLOCK(inp);
3435 			SCTP_INP_INFO_WUNLOCK();
3436 			return;
3437 		}
3438 	}
3439 	inp->sctp_socket = NULL;
3440 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3441 	    SCTP_PCB_FLAGS_UNBOUND) {
3442 		/*
3443 		 * ok, this guy has been bound. It's port is somewhere in
3444 		 * the SCTP_BASE_INFO(hash table). Remove it!
3445 		 */
3446 		LIST_REMOVE(inp, sctp_hash);
3447 		inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3448 	}
3449 	/*
3450 	 * If there is a timer running to kill us, forget it, since it may
3451 	 * have a contest on the INP lock.. which would cause us to die ...
3452 	 */
3453 	cnt = 0;
3454 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3455 		SCTP_TCB_LOCK(asoc);
3456 		if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3457 			if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3458 				asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3459 				sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3460 			}
3461 			cnt++;
3462 			SCTP_TCB_UNLOCK(asoc);
3463 			continue;
3464 		}
3465 		/* Free associations that are NOT killing us */
3466 		if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3467 		    ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3468 			struct mbuf *op_err;
3469 
3470 			op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3471 			asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3472 			sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3473 			SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3474 		} else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3475 			cnt++;
3476 			SCTP_TCB_UNLOCK(asoc);
3477 			continue;
3478 		}
3479 		if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3480 		    (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3481 			SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3482 		}
3483 		if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3484 			cnt++;
3485 		}
3486 	}
3487 	if (cnt) {
3488 		/* Ok we have someone out there that will kill us */
3489 		(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3490 #ifdef SCTP_LOG_CLOSING
3491 		sctp_log_closing(inp, NULL, 3);
3492 #endif
3493 		SCTP_INP_WUNLOCK(inp);
3494 		SCTP_ASOC_CREATE_UNLOCK(inp);
3495 		SCTP_INP_INFO_WUNLOCK();
3496 		return;
3497 	}
3498 	if (SCTP_INP_LOCK_CONTENDED(inp))
3499 		being_refed++;
3500 	if (SCTP_INP_READ_CONTENDED(inp))
3501 		being_refed++;
3502 	if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3503 		being_refed++;
3504 
3505 	if ((inp->refcount) ||
3506 	    (being_refed) ||
3507 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3508 		(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3509 #ifdef SCTP_LOG_CLOSING
3510 		sctp_log_closing(inp, NULL, 4);
3511 #endif
3512 		sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3513 		SCTP_INP_WUNLOCK(inp);
3514 		SCTP_ASOC_CREATE_UNLOCK(inp);
3515 		SCTP_INP_INFO_WUNLOCK();
3516 		return;
3517 	}
3518 	inp->sctp_ep.signature_change.type = 0;
3519 	inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3520 	/*
3521 	 * Remove it from the list .. last thing we need a lock for.
3522 	 */
3523 	LIST_REMOVE(inp, sctp_list);
3524 	SCTP_INP_WUNLOCK(inp);
3525 	SCTP_ASOC_CREATE_UNLOCK(inp);
3526 	SCTP_INP_INFO_WUNLOCK();
3527 	/*
3528 	 * Now we release all locks. Since this INP cannot be found anymore
3529 	 * except possibly by the kill timer that might be running. We call
3530 	 * the drain function here. It should hit the case were it sees the
3531 	 * ACTIVE flag cleared and exit out freeing us to proceed and
3532 	 * destroy everything.
3533 	 */
3534 	if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3535 		(void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3536 	} else {
3537 		/* Probably un-needed */
3538 		(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3539 	}
3540 
3541 #ifdef SCTP_LOG_CLOSING
3542 	sctp_log_closing(inp, NULL, 5);
3543 #endif
3544 
3545 
3546 	if ((inp->sctp_asocidhash) != NULL) {
3547 		SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3548 		inp->sctp_asocidhash = NULL;
3549 	}
3550 	/* sa_ignore FREED_MEMORY */
3551 	TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3552 		/* Its only abandoned if it had data left */
3553 		if (sq->length)
3554 			SCTP_STAT_INCR(sctps_left_abandon);
3555 
3556 		TAILQ_REMOVE(&inp->read_queue, sq, next);
3557 		sctp_free_remote_addr(sq->whoFrom);
3558 		if (so)
3559 			so->so_rcv.sb_cc -= sq->length;
3560 		if (sq->data) {
3561 			sctp_m_freem(sq->data);
3562 			sq->data = NULL;
3563 		}
3564 		/*
3565 		 * no need to free the net count, since at this point all
3566 		 * assoc's are gone.
3567 		 */
3568 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3569 		SCTP_DECR_READQ_COUNT();
3570 	}
3571 	/* Now the sctp_pcb things */
3572 	/*
3573 	 * free each asoc if it is not already closed/free. we can't use the
3574 	 * macro here since le_next will get freed as part of the
3575 	 * sctp_free_assoc() call.
3576 	 */
3577 	if (so) {
3578 #ifdef IPSEC
3579 		ipsec_delete_pcbpolicy(ip_pcb);
3580 #endif				/* IPSEC */
3581 
3582 		/* Unlocks not needed since the socket is gone now */
3583 	}
3584 	if (ip_pcb->inp_options) {
3585 		(void)sctp_m_free(ip_pcb->inp_options);
3586 		ip_pcb->inp_options = 0;
3587 	}
3588 #ifdef INET6
3589 	if (ip_pcb->inp_vflag & INP_IPV6) {
3590 		struct in6pcb *in6p;
3591 
3592 		in6p = (struct in6pcb *)inp;
3593 		ip6_freepcbopts(in6p->in6p_outputopts);
3594 	}
3595 #endif				/* INET6 */
3596 	ip_pcb->inp_vflag = 0;
3597 	/* free up authentication fields */
3598 	if (inp->sctp_ep.local_auth_chunks != NULL)
3599 		sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3600 	if (inp->sctp_ep.local_hmacs != NULL)
3601 		sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3602 
3603 	LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3604 		LIST_REMOVE(shared_key, next);
3605 		sctp_free_sharedkey(shared_key);
3606 		/* sa_ignore FREED_MEMORY */
3607 	}
3608 
3609 	/*
3610 	 * if we have an address list the following will free the list of
3611 	 * ifaddr's that are set into this ep. Again macro limitations here,
3612 	 * since the LIST_FOREACH could be a bad idea.
3613 	 */
3614 	LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3615 		sctp_remove_laddr(laddr);
3616 	}
3617 
3618 #ifdef SCTP_TRACK_FREED_ASOCS
3619 	/* TEMP CODE */
3620 	LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3621 		LIST_REMOVE(asoc, sctp_tcblist);
3622 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3623 		SCTP_DECR_ASOC_COUNT();
3624 	}
3625 	/* *** END TEMP CODE *** */
3626 #endif
3627 	/* Now lets see about freeing the EP hash table. */
3628 	if (inp->sctp_tcbhash != NULL) {
3629 		SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3630 		inp->sctp_tcbhash = NULL;
3631 	}
3632 	/* Now we must put the ep memory back into the zone pool */
3633 	INP_LOCK_DESTROY(&inp->ip_inp.inp);
3634 	SCTP_INP_LOCK_DESTROY(inp);
3635 	SCTP_INP_READ_DESTROY(inp);
3636 	SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3637 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3638 	SCTP_DECR_EP_COUNT();
3639 }
3640 
3641 
3642 struct sctp_nets *
3643 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3644 {
3645 	struct sctp_nets *net;
3646 
3647 	/* locate the address */
3648 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3649 		if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3650 			return (net);
3651 	}
3652 	return (NULL);
3653 }
3654 
3655 
3656 int
3657 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3658 {
3659 	struct sctp_ifa *sctp_ifa;
3660 
3661 	sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3662 	if (sctp_ifa) {
3663 		return (1);
3664 	} else {
3665 		return (0);
3666 	}
3667 }
3668 
3669 /*
3670  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3671  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3672  * stats of stuff.
3673  */
3674 int
3675 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3676     struct sctp_nets **netp, int set_scope, int from)
3677 {
3678 	/*
3679 	 * The following is redundant to the same lines in the
3680 	 * sctp_aloc_assoc() but is needed since others call the add address
3681 	 * function
3682 	 */
3683 	struct sctp_nets *net, *netfirst;
3684 	int addr_inscope;
3685 
3686 	SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3687 	    from);
3688 	SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3689 
3690 	netfirst = sctp_findnet(stcb, newaddr);
3691 	if (netfirst) {
3692 		/*
3693 		 * Lie and return ok, we don't want to make the association
3694 		 * go away for this behavior. It will happen in the TCP
3695 		 * model in a connected socket. It does not reach the hash
3696 		 * table until after the association is built so it can't be
3697 		 * found. Mark as reachable, since the initial creation will
3698 		 * have been cleared and the NOT_IN_ASSOC flag will have
3699 		 * been added... and we don't want to end up removing it
3700 		 * back out.
3701 		 */
3702 		if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3703 			netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3704 			    SCTP_ADDR_UNCONFIRMED);
3705 		} else {
3706 			netfirst->dest_state = SCTP_ADDR_REACHABLE;
3707 		}
3708 
3709 		return (0);
3710 	}
3711 	addr_inscope = 1;
3712 	switch (newaddr->sa_family) {
3713 #ifdef INET
3714 	case AF_INET:
3715 		{
3716 			struct sockaddr_in *sin;
3717 
3718 			sin = (struct sockaddr_in *)newaddr;
3719 			if (sin->sin_addr.s_addr == 0) {
3720 				/* Invalid address */
3721 				return (-1);
3722 			}
3723 			/* zero out the bzero area */
3724 			memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3725 
3726 			/* assure len is set */
3727 			sin->sin_len = sizeof(struct sockaddr_in);
3728 			if (set_scope) {
3729 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3730 				stcb->asoc.scope.ipv4_local_scope = 1;
3731 #else
3732 				if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3733 					stcb->asoc.scope.ipv4_local_scope = 1;
3734 				}
3735 #endif				/* SCTP_DONT_DO_PRIVADDR_SCOPE */
3736 			} else {
3737 				/* Validate the address is in scope */
3738 				if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3739 				    (stcb->asoc.scope.ipv4_local_scope == 0)) {
3740 					addr_inscope = 0;
3741 				}
3742 			}
3743 			break;
3744 		}
3745 #endif
3746 #ifdef INET6
3747 	case AF_INET6:
3748 		{
3749 			struct sockaddr_in6 *sin6;
3750 
3751 			sin6 = (struct sockaddr_in6 *)newaddr;
3752 			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3753 				/* Invalid address */
3754 				return (-1);
3755 			}
3756 			/* assure len is set */
3757 			sin6->sin6_len = sizeof(struct sockaddr_in6);
3758 			if (set_scope) {
3759 				if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3760 					stcb->asoc.scope.loopback_scope = 1;
3761 					stcb->asoc.scope.local_scope = 0;
3762 					stcb->asoc.scope.ipv4_local_scope = 1;
3763 					stcb->asoc.scope.site_scope = 1;
3764 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3765 					/*
3766 					 * If the new destination is a
3767 					 * LINK_LOCAL we must have common
3768 					 * site scope. Don't set the local
3769 					 * scope since we may not share all
3770 					 * links, only loopback can do this.
3771 					 * Links on the local network would
3772 					 * also be on our private network
3773 					 * for v4 too.
3774 					 */
3775 					stcb->asoc.scope.ipv4_local_scope = 1;
3776 					stcb->asoc.scope.site_scope = 1;
3777 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3778 					/*
3779 					 * If the new destination is
3780 					 * SITE_LOCAL then we must have site
3781 					 * scope in common.
3782 					 */
3783 					stcb->asoc.scope.site_scope = 1;
3784 				}
3785 			} else {
3786 				/* Validate the address is in scope */
3787 				if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3788 				    (stcb->asoc.scope.loopback_scope == 0)) {
3789 					addr_inscope = 0;
3790 				} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3791 				    (stcb->asoc.scope.local_scope == 0)) {
3792 					addr_inscope = 0;
3793 				} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3794 				    (stcb->asoc.scope.site_scope == 0)) {
3795 					addr_inscope = 0;
3796 				}
3797 			}
3798 			break;
3799 		}
3800 #endif
3801 	default:
3802 		/* not supported family type */
3803 		return (-1);
3804 	}
3805 	net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3806 	if (net == NULL) {
3807 		return (-1);
3808 	}
3809 	SCTP_INCR_RADDR_COUNT();
3810 	bzero(net, sizeof(struct sctp_nets));
3811 	(void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3812 	memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3813 	switch (newaddr->sa_family) {
3814 #ifdef INET
3815 	case AF_INET:
3816 		((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3817 		break;
3818 #endif
3819 #ifdef INET6
3820 	case AF_INET6:
3821 		((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3822 		break;
3823 #endif
3824 	default:
3825 		break;
3826 	}
3827 	net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3828 	if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3829 		stcb->asoc.scope.loopback_scope = 1;
3830 		stcb->asoc.scope.ipv4_local_scope = 1;
3831 		stcb->asoc.scope.local_scope = 0;
3832 		stcb->asoc.scope.site_scope = 1;
3833 		addr_inscope = 1;
3834 	}
3835 	net->failure_threshold = stcb->asoc.def_net_failure;
3836 	net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3837 	if (addr_inscope == 0) {
3838 		net->dest_state = (SCTP_ADDR_REACHABLE |
3839 		    SCTP_ADDR_OUT_OF_SCOPE);
3840 	} else {
3841 		if (from == SCTP_ADDR_IS_CONFIRMED)
3842 			/* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3843 			net->dest_state = SCTP_ADDR_REACHABLE;
3844 		else
3845 			net->dest_state = SCTP_ADDR_REACHABLE |
3846 			    SCTP_ADDR_UNCONFIRMED;
3847 	}
3848 	/*
3849 	 * We set this to 0, the timer code knows that this means its an
3850 	 * initial value
3851 	 */
3852 	net->rto_needed = 1;
3853 	net->RTO = 0;
3854 	net->RTO_measured = 0;
3855 	stcb->asoc.numnets++;
3856 	net->ref_count = 1;
3857 	net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3858 	net->port = stcb->asoc.port;
3859 	net->dscp = stcb->asoc.default_dscp;
3860 #ifdef INET6
3861 	net->flowlabel = stcb->asoc.default_flowlabel;
3862 #endif
3863 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3864 		net->dest_state |= SCTP_ADDR_NOHB;
3865 	} else {
3866 		net->dest_state &= ~SCTP_ADDR_NOHB;
3867 	}
3868 	if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3869 		net->dest_state |= SCTP_ADDR_NO_PMTUD;
3870 	} else {
3871 		net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3872 	}
3873 	net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3874 	/* Init the timer structure */
3875 	SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3876 	SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3877 	SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3878 
3879 	/* Now generate a route for this guy */
3880 #ifdef INET6
3881 	/* KAME hack: embed scopeid */
3882 	if (newaddr->sa_family == AF_INET6) {
3883 		struct sockaddr_in6 *sin6;
3884 
3885 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3886 		(void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3887 		sin6->sin6_scope_id = 0;
3888 	}
3889 #endif
3890 	SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3891 
3892 	if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3893 		/* Get source address */
3894 		net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3895 		    stcb,
3896 		    (sctp_route_t *) & net->ro,
3897 		    net,
3898 		    0,
3899 		    stcb->asoc.vrf_id);
3900 		/* Now get the interface MTU */
3901 		if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3902 			net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3903 		}
3904 		if (net->mtu > 0) {
3905 			uint32_t rmtu;
3906 
3907 			rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3908 			if (rmtu == 0) {
3909 				/*
3910 				 * Start things off to match mtu of
3911 				 * interface please.
3912 				 */
3913 				SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3914 				    net->ro.ro_rt, net->mtu);
3915 			} else {
3916 				/*
3917 				 * we take the route mtu over the interface,
3918 				 * since the route may be leading out the
3919 				 * loopback, or a different interface.
3920 				 */
3921 				net->mtu = rmtu;
3922 			}
3923 		}
3924 	}
3925 	if (net->mtu == 0) {
3926 		switch (newaddr->sa_family) {
3927 #ifdef INET
3928 		case AF_INET:
3929 			net->mtu = SCTP_DEFAULT_MTU;
3930 			break;
3931 #endif
3932 #ifdef INET6
3933 		case AF_INET6:
3934 			net->mtu = 1280;
3935 			break;
3936 #endif
3937 		default:
3938 			break;
3939 		}
3940 	}
3941 	if (net->port) {
3942 		net->mtu -= (uint32_t) sizeof(struct udphdr);
3943 	}
3944 	if (from == SCTP_ALLOC_ASOC) {
3945 		stcb->asoc.smallest_mtu = net->mtu;
3946 	}
3947 	if (stcb->asoc.smallest_mtu > net->mtu) {
3948 		stcb->asoc.smallest_mtu = net->mtu;
3949 	}
3950 #ifdef INET6
3951 	if (newaddr->sa_family == AF_INET6) {
3952 		struct sockaddr_in6 *sin6;
3953 
3954 		sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3955 		(void)sa6_recoverscope(sin6);
3956 	}
3957 #endif
3958 
3959 	/* JRS - Use the congestion control given in the CC module */
3960 	if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3961 		(*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3962 
3963 	/*
3964 	 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3965 	 * of assoc (2005/06/27, iyengar@cis.udel.edu)
3966 	 */
3967 	net->find_pseudo_cumack = 1;
3968 	net->find_rtx_pseudo_cumack = 1;
3969 	net->src_addr_selected = 0;
3970 	/* Choose an initial flowid. */
3971 	net->flowid = stcb->asoc.my_vtag ^
3972 	    ntohs(stcb->rport) ^
3973 	    ntohs(stcb->sctp_ep->sctp_lport);
3974 #ifdef INVARIANTS
3975 	net->flowidset = 1;
3976 #endif
3977 	if (netp) {
3978 		*netp = net;
3979 	}
3980 	netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3981 	if (net->ro.ro_rt == NULL) {
3982 		/* Since we have no route put it at the back */
3983 		TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3984 	} else if (netfirst == NULL) {
3985 		/* We are the first one in the pool. */
3986 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3987 	} else if (netfirst->ro.ro_rt == NULL) {
3988 		/*
3989 		 * First one has NO route. Place this one ahead of the first
3990 		 * one.
3991 		 */
3992 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3993 	} else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3994 		/*
3995 		 * This one has a different interface than the one at the
3996 		 * top of the list. Place it ahead.
3997 		 */
3998 		TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3999 	} else {
4000 		/*
4001 		 * Ok we have the same interface as the first one. Move
4002 		 * forward until we find either a) one with a NULL route...
4003 		 * insert ahead of that b) one with a different ifp.. insert
4004 		 * after that. c) end of the list.. insert at the tail.
4005 		 */
4006 		struct sctp_nets *netlook;
4007 
4008 		do {
4009 			netlook = TAILQ_NEXT(netfirst, sctp_next);
4010 			if (netlook == NULL) {
4011 				/* End of the list */
4012 				TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4013 				break;
4014 			} else if (netlook->ro.ro_rt == NULL) {
4015 				/* next one has NO route */
4016 				TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4017 				break;
4018 			} else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4019 				TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4020 				    net, sctp_next);
4021 				break;
4022 			}
4023 			/* Shift forward */
4024 			netfirst = netlook;
4025 		} while (netlook != NULL);
4026 	}
4027 
4028 	/* got to have a primary set */
4029 	if (stcb->asoc.primary_destination == 0) {
4030 		stcb->asoc.primary_destination = net;
4031 	} else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4032 		    (net->ro.ro_rt) &&
4033 	    ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4034 		/* No route to current primary adopt new primary */
4035 		stcb->asoc.primary_destination = net;
4036 	}
4037 	/* Validate primary is first */
4038 	net = TAILQ_FIRST(&stcb->asoc.nets);
4039 	if ((net != stcb->asoc.primary_destination) &&
4040 	    (stcb->asoc.primary_destination)) {
4041 		/*
4042 		 * first one on the list is NOT the primary sctp_cmpaddr()
4043 		 * is much more efficient if the primary is the first on the
4044 		 * list, make it so.
4045 		 */
4046 		TAILQ_REMOVE(&stcb->asoc.nets,
4047 		    stcb->asoc.primary_destination, sctp_next);
4048 		TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4049 		    stcb->asoc.primary_destination, sctp_next);
4050 	}
4051 	return (0);
4052 }
4053 
4054 
4055 static uint32_t
4056 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4057 {
4058 	uint32_t id;
4059 	struct sctpasochead *head;
4060 	struct sctp_tcb *lstcb;
4061 
4062 	SCTP_INP_WLOCK(inp);
4063 try_again:
4064 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4065 		/* TSNH */
4066 		SCTP_INP_WUNLOCK(inp);
4067 		return (0);
4068 	}
4069 	/*
4070 	 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4071 	 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4072 	 */
4073 	if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4074 		inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4075 	}
4076 	id = inp->sctp_associd_counter;
4077 	inp->sctp_associd_counter++;
4078 	lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4079 	if (lstcb) {
4080 		goto try_again;
4081 	}
4082 	head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4083 	LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4084 	stcb->asoc.in_asocid_hash = 1;
4085 	SCTP_INP_WUNLOCK(inp);
4086 	return id;
4087 }
4088 
4089 /*
4090  * allocate an association and add it to the endpoint. The caller must be
4091  * careful to add all additional addresses once they are know right away or
4092  * else the assoc will be may experience a blackout scenario.
4093  */
4094 struct sctp_tcb *
4095 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4096     int *error, uint32_t override_tag, uint32_t vrf_id,
4097     struct thread *p
4098 )
4099 {
4100 	/* note the p argument is only valid in unbound sockets */
4101 
4102 	struct sctp_tcb *stcb;
4103 	struct sctp_association *asoc;
4104 	struct sctpasochead *head;
4105 	uint16_t rport;
4106 	int err;
4107 
4108 	/*
4109 	 * Assumption made here: Caller has done a
4110 	 * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4111 	 * address does not exist already.
4112 	 */
4113 	if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4114 		/* Hit max assoc, sorry no more */
4115 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4116 		*error = ENOBUFS;
4117 		return (NULL);
4118 	}
4119 	if (firstaddr == NULL) {
4120 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4121 		*error = EINVAL;
4122 		return (NULL);
4123 	}
4124 	SCTP_INP_RLOCK(inp);
4125 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4126 	    ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4127 	    (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4128 		/*
4129 		 * If its in the TCP pool, its NOT allowed to create an
4130 		 * association. The parent listener needs to call
4131 		 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4132 		 * off, or connected one does this.. its an error.
4133 		 */
4134 		SCTP_INP_RUNLOCK(inp);
4135 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4136 		*error = EINVAL;
4137 		return (NULL);
4138 	}
4139 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4140 	    (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4141 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4142 		    (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4143 			SCTP_INP_RUNLOCK(inp);
4144 			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4145 			*error = EINVAL;
4146 			return (NULL);
4147 		}
4148 	}
4149 	SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4150 #ifdef SCTP_DEBUG
4151 	if (firstaddr) {
4152 		SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4153 		switch (firstaddr->sa_family) {
4154 #ifdef INET
4155 		case AF_INET:
4156 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4157 			    ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4158 			break;
4159 #endif
4160 #ifdef INET6
4161 		case AF_INET6:
4162 			SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4163 			    ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4164 			break;
4165 #endif
4166 		default:
4167 			break;
4168 		}
4169 	} else {
4170 		SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4171 	}
4172 #endif				/* SCTP_DEBUG */
4173 	switch (firstaddr->sa_family) {
4174 #ifdef INET
4175 	case AF_INET:
4176 		{
4177 			struct sockaddr_in *sin;
4178 
4179 			sin = (struct sockaddr_in *)firstaddr;
4180 			if ((ntohs(sin->sin_port) == 0) ||
4181 			    (sin->sin_addr.s_addr == INADDR_ANY) ||
4182 			    (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4183 			    IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4184 				/* Invalid address */
4185 				SCTP_INP_RUNLOCK(inp);
4186 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4187 				*error = EINVAL;
4188 				return (NULL);
4189 			}
4190 			rport = sin->sin_port;
4191 			break;
4192 		}
4193 #endif
4194 #ifdef INET6
4195 	case AF_INET6:
4196 		{
4197 			struct sockaddr_in6 *sin6;
4198 
4199 			sin6 = (struct sockaddr_in6 *)firstaddr;
4200 			if ((ntohs(sin6->sin6_port) == 0) ||
4201 			    IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4202 			    IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4203 				/* Invalid address */
4204 				SCTP_INP_RUNLOCK(inp);
4205 				SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4206 				*error = EINVAL;
4207 				return (NULL);
4208 			}
4209 			rport = sin6->sin6_port;
4210 			break;
4211 		}
4212 #endif
4213 	default:
4214 		/* not supported family type */
4215 		SCTP_INP_RUNLOCK(inp);
4216 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4217 		*error = EINVAL;
4218 		return (NULL);
4219 	}
4220 	SCTP_INP_RUNLOCK(inp);
4221 	if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4222 		/*
4223 		 * If you have not performed a bind, then we need to do the
4224 		 * ephemeral bind for you.
4225 		 */
4226 		if ((err = sctp_inpcb_bind(inp->sctp_socket,
4227 		    (struct sockaddr *)NULL,
4228 		    (struct sctp_ifa *)NULL,
4229 		    p
4230 		    ))) {
4231 			/* bind error, probably perm */
4232 			*error = err;
4233 			return (NULL);
4234 		}
4235 	}
4236 	stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4237 	if (stcb == NULL) {
4238 		/* out of memory? */
4239 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4240 		*error = ENOMEM;
4241 		return (NULL);
4242 	}
4243 	SCTP_INCR_ASOC_COUNT();
4244 
4245 	bzero(stcb, sizeof(*stcb));
4246 	asoc = &stcb->asoc;
4247 
4248 	asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4249 	SCTP_TCB_LOCK_INIT(stcb);
4250 	SCTP_TCB_SEND_LOCK_INIT(stcb);
4251 	stcb->rport = rport;
4252 	/* setup back pointer's */
4253 	stcb->sctp_ep = inp;
4254 	stcb->sctp_socket = inp->sctp_socket;
4255 	if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4256 		/* failed */
4257 		SCTP_TCB_LOCK_DESTROY(stcb);
4258 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4259 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4260 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4261 		SCTP_DECR_ASOC_COUNT();
4262 		*error = err;
4263 		return (NULL);
4264 	}
4265 	/* and the port */
4266 	SCTP_INP_INFO_WLOCK();
4267 	SCTP_INP_WLOCK(inp);
4268 	if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4269 		/* inpcb freed while alloc going on */
4270 		SCTP_TCB_LOCK_DESTROY(stcb);
4271 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4272 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4273 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4274 		SCTP_INP_WUNLOCK(inp);
4275 		SCTP_INP_INFO_WUNLOCK();
4276 		SCTP_DECR_ASOC_COUNT();
4277 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4278 		*error = EINVAL;
4279 		return (NULL);
4280 	}
4281 	SCTP_TCB_LOCK(stcb);
4282 
4283 	/* now that my_vtag is set, add it to the hash */
4284 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4285 	/* put it in the bucket in the vtag hash of assoc's for the system */
4286 	LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4287 	SCTP_INP_INFO_WUNLOCK();
4288 
4289 	if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4290 		/* failure.. memory error? */
4291 		if (asoc->strmout) {
4292 			SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4293 			asoc->strmout = NULL;
4294 		}
4295 		if (asoc->mapping_array) {
4296 			SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4297 			asoc->mapping_array = NULL;
4298 		}
4299 		if (asoc->nr_mapping_array) {
4300 			SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4301 			asoc->nr_mapping_array = NULL;
4302 		}
4303 		SCTP_DECR_ASOC_COUNT();
4304 		SCTP_TCB_UNLOCK(stcb);
4305 		SCTP_TCB_LOCK_DESTROY(stcb);
4306 		SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4307 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4308 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4309 		SCTP_INP_WUNLOCK(inp);
4310 		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4311 		*error = ENOBUFS;
4312 		return (NULL);
4313 	}
4314 	/* Init all the timers */
4315 	SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4316 	SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4317 	SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4318 	SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4319 	SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4320 	SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4321 	SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4322 
4323 	LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4324 	/* now file the port under the hash as well */
4325 	if (inp->sctp_tcbhash != NULL) {
4326 		head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4327 		    inp->sctp_hashmark)];
4328 		LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4329 	}
4330 	SCTP_INP_WUNLOCK(inp);
4331 	SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4332 	return (stcb);
4333 }
4334 
4335 
4336 void
4337 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4338 {
4339 	struct sctp_association *asoc;
4340 
4341 	asoc = &stcb->asoc;
4342 	asoc->numnets--;
4343 	TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4344 	if (net == asoc->primary_destination) {
4345 		/* Reset primary */
4346 		struct sctp_nets *lnet;
4347 
4348 		lnet = TAILQ_FIRST(&asoc->nets);
4349 		/*
4350 		 * Mobility adaptation Ideally, if deleted destination is
4351 		 * the primary, it becomes a fast retransmission trigger by
4352 		 * the subsequent SET PRIMARY. (by micchie)
4353 		 */
4354 		if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4355 		    SCTP_MOBILITY_BASE) ||
4356 		    sctp_is_mobility_feature_on(stcb->sctp_ep,
4357 		    SCTP_MOBILITY_FASTHANDOFF)) {
4358 			SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4359 			if (asoc->deleted_primary != NULL) {
4360 				SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4361 				goto out;
4362 			}
4363 			asoc->deleted_primary = net;
4364 			atomic_add_int(&net->ref_count, 1);
4365 			memset(&net->lastsa, 0, sizeof(net->lastsa));
4366 			memset(&net->lastsv, 0, sizeof(net->lastsv));
4367 			sctp_mobility_feature_on(stcb->sctp_ep,
4368 			    SCTP_MOBILITY_PRIM_DELETED);
4369 			sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4370 			    stcb->sctp_ep, stcb, NULL);
4371 		}
4372 out:
4373 		/* Try to find a confirmed primary */
4374 		asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4375 	}
4376 	if (net == asoc->last_data_chunk_from) {
4377 		/* Reset primary */
4378 		asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4379 	}
4380 	if (net == asoc->last_control_chunk_from) {
4381 		/* Clear net */
4382 		asoc->last_control_chunk_from = NULL;
4383 	}
4384 	if (net == stcb->asoc.alternate) {
4385 		sctp_free_remote_addr(stcb->asoc.alternate);
4386 		stcb->asoc.alternate = NULL;
4387 	}
4388 	sctp_free_remote_addr(net);
4389 }
4390 
4391 /*
4392  * remove a remote endpoint address from an association, it will fail if the
4393  * address does not exist.
4394  */
4395 int
4396 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4397 {
4398 	/*
4399 	 * Here we need to remove a remote address. This is quite simple, we
4400 	 * first find it in the list of address for the association
4401 	 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4402 	 * on that item. Note we do not allow it to be removed if there are
4403 	 * no other addresses.
4404 	 */
4405 	struct sctp_association *asoc;
4406 	struct sctp_nets *net, *nnet;
4407 
4408 	asoc = &stcb->asoc;
4409 
4410 	/* locate the address */
4411 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4412 		if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4413 			continue;
4414 		}
4415 		if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4416 		    remaddr)) {
4417 			/* we found the guy */
4418 			if (asoc->numnets < 2) {
4419 				/* Must have at LEAST two remote addresses */
4420 				return (-1);
4421 			} else {
4422 				sctp_remove_net(stcb, net);
4423 				return (0);
4424 			}
4425 		}
4426 	}
4427 	/* not found. */
4428 	return (-2);
4429 }
4430 
4431 void
4432 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4433 {
4434 	struct sctpvtaghead *chain;
4435 	struct sctp_tagblock *twait_block;
4436 	int found = 0;
4437 	int i;
4438 
4439 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4440 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4441 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4442 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4443 			    (twait_block->vtag_block[i].lport == lport) &&
4444 			    (twait_block->vtag_block[i].rport == rport)) {
4445 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4446 				twait_block->vtag_block[i].v_tag = 0;
4447 				twait_block->vtag_block[i].lport = 0;
4448 				twait_block->vtag_block[i].rport = 0;
4449 				found = 1;
4450 				break;
4451 			}
4452 		}
4453 		if (found)
4454 			break;
4455 	}
4456 }
4457 
4458 int
4459 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4460 {
4461 	struct sctpvtaghead *chain;
4462 	struct sctp_tagblock *twait_block;
4463 	int found = 0;
4464 	int i;
4465 
4466 	SCTP_INP_INFO_WLOCK();
4467 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4468 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4469 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4470 			if ((twait_block->vtag_block[i].v_tag == tag) &&
4471 			    (twait_block->vtag_block[i].lport == lport) &&
4472 			    (twait_block->vtag_block[i].rport == rport)) {
4473 				found = 1;
4474 				break;
4475 			}
4476 		}
4477 		if (found)
4478 			break;
4479 	}
4480 	SCTP_INP_INFO_WUNLOCK();
4481 	return (found);
4482 }
4483 
4484 
4485 void
4486 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4487 {
4488 	struct sctpvtaghead *chain;
4489 	struct sctp_tagblock *twait_block;
4490 	struct timeval now;
4491 	int set, i;
4492 
4493 	if (time == 0) {
4494 		/* Its disabled */
4495 		return;
4496 	}
4497 	(void)SCTP_GETTIME_TIMEVAL(&now);
4498 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4499 	set = 0;
4500 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4501 		/* Block(s) present, lets find space, and expire on the fly */
4502 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4503 			if ((twait_block->vtag_block[i].v_tag == 0) &&
4504 			    !set) {
4505 				twait_block->vtag_block[i].tv_sec_at_expire =
4506 				    now.tv_sec + time;
4507 				twait_block->vtag_block[i].v_tag = tag;
4508 				twait_block->vtag_block[i].lport = lport;
4509 				twait_block->vtag_block[i].rport = rport;
4510 				set = 1;
4511 			} else if ((twait_block->vtag_block[i].v_tag) &&
4512 			    ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4513 				/* Audit expires this guy */
4514 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
4515 				twait_block->vtag_block[i].v_tag = 0;
4516 				twait_block->vtag_block[i].lport = 0;
4517 				twait_block->vtag_block[i].rport = 0;
4518 				if (set == 0) {
4519 					/* Reuse it for my new tag */
4520 					twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4521 					twait_block->vtag_block[i].v_tag = tag;
4522 					twait_block->vtag_block[i].lport = lport;
4523 					twait_block->vtag_block[i].rport = rport;
4524 					set = 1;
4525 				}
4526 			}
4527 		}
4528 		if (set) {
4529 			/*
4530 			 * We only do up to the block where we can place our
4531 			 * tag for audits
4532 			 */
4533 			break;
4534 		}
4535 	}
4536 	/* Need to add a new block to chain */
4537 	if (!set) {
4538 		SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4539 		    sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4540 		if (twait_block == NULL) {
4541 #ifdef INVARIANTS
4542 			panic("Can not alloc tagblock");
4543 #endif
4544 			return;
4545 		}
4546 		memset(twait_block, 0, sizeof(struct sctp_tagblock));
4547 		LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4548 		twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4549 		twait_block->vtag_block[0].v_tag = tag;
4550 		twait_block->vtag_block[0].lport = lport;
4551 		twait_block->vtag_block[0].rport = rport;
4552 	}
4553 }
4554 
4555 
4556 
4557 /*-
4558  * Free the association after un-hashing the remote port. This
4559  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4560  * expect that the input to this function IS a locked TCB.
4561  * It will return 0, if it did NOT destroy the association (instead
4562  * it unlocks it. It will return NON-zero if it either destroyed the
4563  * association OR the association is already destroyed.
4564  */
4565 int
4566 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4567 {
4568 	int i;
4569 	struct sctp_association *asoc;
4570 	struct sctp_nets *net, *nnet;
4571 	struct sctp_laddr *laddr, *naddr;
4572 	struct sctp_tmit_chunk *chk, *nchk;
4573 	struct sctp_asconf_addr *aparam, *naparam;
4574 	struct sctp_asconf_ack *aack, *naack;
4575 	struct sctp_stream_reset_list *strrst, *nstrrst;
4576 	struct sctp_queued_to_read *sq, *nsq;
4577 	struct sctp_stream_queue_pending *sp, *nsp;
4578 	sctp_sharedkey_t *shared_key, *nshared_key;
4579 	struct socket *so;
4580 
4581 	/* first, lets purge the entry from the hash table. */
4582 
4583 #ifdef SCTP_LOG_CLOSING
4584 	sctp_log_closing(inp, stcb, 6);
4585 #endif
4586 	if (stcb->asoc.state == 0) {
4587 #ifdef SCTP_LOG_CLOSING
4588 		sctp_log_closing(inp, NULL, 7);
4589 #endif
4590 		/* there is no asoc, really TSNH :-0 */
4591 		return (1);
4592 	}
4593 	if (stcb->asoc.alternate) {
4594 		sctp_free_remote_addr(stcb->asoc.alternate);
4595 		stcb->asoc.alternate = NULL;
4596 	}
4597 	/* TEMP CODE */
4598 	if (stcb->freed_from_where == 0) {
4599 		/* Only record the first place free happened from */
4600 		stcb->freed_from_where = from_location;
4601 	}
4602 	/* TEMP CODE */
4603 
4604 	asoc = &stcb->asoc;
4605 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4606 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4607 		/* nothing around */
4608 		so = NULL;
4609 	else
4610 		so = inp->sctp_socket;
4611 
4612 	/*
4613 	 * We used timer based freeing if a reader or writer is in the way.
4614 	 * So we first check if we are actually being called from a timer,
4615 	 * if so we abort early if a reader or writer is still in the way.
4616 	 */
4617 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4618 	    (from_inpcbfree == SCTP_NORMAL_PROC)) {
4619 		/*
4620 		 * is it the timer driving us? if so are the reader/writers
4621 		 * gone?
4622 		 */
4623 		if (stcb->asoc.refcnt) {
4624 			/* nope, reader or writer in the way */
4625 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4626 			/* no asoc destroyed */
4627 			SCTP_TCB_UNLOCK(stcb);
4628 #ifdef SCTP_LOG_CLOSING
4629 			sctp_log_closing(inp, stcb, 8);
4630 #endif
4631 			return (0);
4632 		}
4633 	}
4634 	/* now clean up any other timers */
4635 	(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4636 	asoc->dack_timer.self = NULL;
4637 	(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4638 	/*-
4639 	 * For stream reset we don't blast this unless
4640 	 * it is a str-reset timer, it might be the
4641 	 * free-asoc timer which we DON'T want to
4642 	 * disturb.
4643 	 */
4644 	if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4645 		asoc->strreset_timer.self = NULL;
4646 	(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4647 	asoc->asconf_timer.self = NULL;
4648 	(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4649 	asoc->autoclose_timer.self = NULL;
4650 	(void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4651 	asoc->shut_guard_timer.self = NULL;
4652 	(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4653 	asoc->delayed_event_timer.self = NULL;
4654 	/* Mobility adaptation */
4655 	(void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4656 	asoc->delete_prim_timer.self = NULL;
4657 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4658 		(void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4659 		net->rxt_timer.self = NULL;
4660 		(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4661 		net->pmtu_timer.self = NULL;
4662 		(void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4663 		net->hb_timer.self = NULL;
4664 	}
4665 	/* Now the read queue needs to be cleaned up (only once) */
4666 	if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4667 		stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4668 		SCTP_INP_READ_LOCK(inp);
4669 		TAILQ_FOREACH(sq, &inp->read_queue, next) {
4670 			if (sq->stcb == stcb) {
4671 				sq->do_not_ref_stcb = 1;
4672 				sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4673 				/*
4674 				 * If there is no end, there never will be
4675 				 * now.
4676 				 */
4677 				if (sq->end_added == 0) {
4678 					/* Held for PD-API clear that. */
4679 					sq->pdapi_aborted = 1;
4680 					sq->held_length = 0;
4681 					if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4682 						/*
4683 						 * Need to add a PD-API
4684 						 * aborted indication.
4685 						 * Setting the control_pdapi
4686 						 * assures that it will be
4687 						 * added right after this
4688 						 * msg.
4689 						 */
4690 						uint32_t strseq;
4691 
4692 						stcb->asoc.control_pdapi = sq;
4693 						strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4694 						sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4695 						    stcb,
4696 						    SCTP_PARTIAL_DELIVERY_ABORTED,
4697 						    (void *)&strseq,
4698 						    SCTP_SO_LOCKED);
4699 						stcb->asoc.control_pdapi = NULL;
4700 					}
4701 				}
4702 				/* Add an end to wake them */
4703 				sq->end_added = 1;
4704 			}
4705 		}
4706 		SCTP_INP_READ_UNLOCK(inp);
4707 		if (stcb->block_entry) {
4708 			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4709 			stcb->block_entry->error = ECONNRESET;
4710 			stcb->block_entry = NULL;
4711 		}
4712 	}
4713 	if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4714 		/*
4715 		 * Someone holds a reference OR the socket is unaccepted
4716 		 * yet.
4717 		 */
4718 		if ((stcb->asoc.refcnt) ||
4719 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4720 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4721 			stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4722 			sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4723 		}
4724 		SCTP_TCB_UNLOCK(stcb);
4725 		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4726 		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4727 			/* nothing around */
4728 			so = NULL;
4729 		if (so) {
4730 			/* Wake any reader/writers */
4731 			sctp_sorwakeup(inp, so);
4732 			sctp_sowwakeup(inp, so);
4733 		}
4734 #ifdef SCTP_LOG_CLOSING
4735 		sctp_log_closing(inp, stcb, 9);
4736 #endif
4737 		/* no asoc destroyed */
4738 		return (0);
4739 	}
4740 #ifdef SCTP_LOG_CLOSING
4741 	sctp_log_closing(inp, stcb, 10);
4742 #endif
4743 	/*
4744 	 * When I reach here, no others want to kill the assoc yet.. and I
4745 	 * own the lock. Now its possible an abort comes in when I do the
4746 	 * lock exchange below to grab all the locks to do the final take
4747 	 * out. to prevent this we increment the count, which will start a
4748 	 * timer and blow out above thus assuring us that we hold exclusive
4749 	 * killing of the asoc. Note that after getting back the TCB lock we
4750 	 * will go ahead and increment the counter back up and stop any
4751 	 * timer a passing stranger may have started :-S
4752 	 */
4753 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4754 		atomic_add_int(&stcb->asoc.refcnt, 1);
4755 
4756 		SCTP_TCB_UNLOCK(stcb);
4757 		SCTP_INP_INFO_WLOCK();
4758 		SCTP_INP_WLOCK(inp);
4759 		SCTP_TCB_LOCK(stcb);
4760 	}
4761 	/* Double check the GONE flag */
4762 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4763 	    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4764 		/* nothing around */
4765 		so = NULL;
4766 
4767 	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4768 	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4769 		/*
4770 		 * For TCP type we need special handling when we are
4771 		 * connected. We also include the peel'ed off ones to.
4772 		 */
4773 		if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4774 			inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4775 			inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4776 			if (so) {
4777 				SOCK_LOCK(so);
4778 				if (so->so_rcv.sb_cc == 0) {
4779 					so->so_state &= ~(SS_ISCONNECTING |
4780 					    SS_ISDISCONNECTING |
4781 					    SS_ISCONFIRMING |
4782 					    SS_ISCONNECTED);
4783 				}
4784 				socantrcvmore_locked(so);
4785 				sctp_sowwakeup(inp, so);
4786 				sctp_sorwakeup(inp, so);
4787 				SCTP_SOWAKEUP(so);
4788 			}
4789 		}
4790 	}
4791 	/*
4792 	 * Make it invalid too, that way if its about to run it will abort
4793 	 * and return.
4794 	 */
4795 	/* re-increment the lock */
4796 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4797 		atomic_add_int(&stcb->asoc.refcnt, -1);
4798 	}
4799 	if (stcb->asoc.refcnt) {
4800 		stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4801 		sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4802 		if (from_inpcbfree == SCTP_NORMAL_PROC) {
4803 			SCTP_INP_INFO_WUNLOCK();
4804 			SCTP_INP_WUNLOCK(inp);
4805 		}
4806 		SCTP_TCB_UNLOCK(stcb);
4807 		return (0);
4808 	}
4809 	asoc->state = 0;
4810 	if (inp->sctp_tcbhash) {
4811 		LIST_REMOVE(stcb, sctp_tcbhash);
4812 	}
4813 	if (stcb->asoc.in_asocid_hash) {
4814 		LIST_REMOVE(stcb, sctp_tcbasocidhash);
4815 	}
4816 	/* Now lets remove it from the list of ALL associations in the EP */
4817 	LIST_REMOVE(stcb, sctp_tcblist);
4818 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
4819 		SCTP_INP_INCR_REF(inp);
4820 		SCTP_INP_WUNLOCK(inp);
4821 	}
4822 	/* pull from vtag hash */
4823 	LIST_REMOVE(stcb, sctp_asocs);
4824 	sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4825 	    inp->sctp_lport, stcb->rport);
4826 
4827 	/*
4828 	 * Now restop the timers to be sure this is paranoia at is finest!
4829 	 */
4830 	(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4831 	(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4832 	(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4833 	(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4834 	(void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4835 	(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4836 	(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4837 	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4838 		(void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4839 		(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4840 		(void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4841 	}
4842 
4843 	asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4844 	/*
4845 	 * The chunk lists and such SHOULD be empty but we check them just
4846 	 * in case.
4847 	 */
4848 	/* anything on the wheel needs to be removed */
4849 	for (i = 0; i < asoc->streamoutcnt; i++) {
4850 		struct sctp_stream_out *outs;
4851 
4852 		outs = &asoc->strmout[i];
4853 		/* now clean up any chunks here */
4854 		TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4855 			TAILQ_REMOVE(&outs->outqueue, sp, next);
4856 			sctp_free_spbufspace(stcb, asoc, sp);
4857 			if (sp->data) {
4858 				if (so) {
4859 					/* Still an open socket - report */
4860 					sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4861 					    0, (void *)sp, SCTP_SO_LOCKED);
4862 				}
4863 				if (sp->data) {
4864 					sctp_m_freem(sp->data);
4865 					sp->data = NULL;
4866 					sp->tail_mbuf = NULL;
4867 					sp->length = 0;
4868 				}
4869 			}
4870 			if (sp->net) {
4871 				sctp_free_remote_addr(sp->net);
4872 				sp->net = NULL;
4873 			}
4874 			sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4875 		}
4876 	}
4877 	/* sa_ignore FREED_MEMORY */
4878 	TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4879 		TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4880 		SCTP_FREE(strrst, SCTP_M_STRESET);
4881 	}
4882 	TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4883 		TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4884 		if (sq->data) {
4885 			sctp_m_freem(sq->data);
4886 			sq->data = NULL;
4887 		}
4888 		sctp_free_remote_addr(sq->whoFrom);
4889 		sq->whoFrom = NULL;
4890 		sq->stcb = NULL;
4891 		/* Free the ctl entry */
4892 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4893 		SCTP_DECR_READQ_COUNT();
4894 		/* sa_ignore FREED_MEMORY */
4895 	}
4896 	TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4897 		TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4898 		if (chk->data) {
4899 			sctp_m_freem(chk->data);
4900 			chk->data = NULL;
4901 		}
4902 		if (chk->holds_key_ref)
4903 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4904 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4905 		SCTP_DECR_CHK_COUNT();
4906 		atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4907 		asoc->free_chunk_cnt--;
4908 		/* sa_ignore FREED_MEMORY */
4909 	}
4910 	/* pending send queue SHOULD be empty */
4911 	TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4912 		if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4913 			asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4914 #ifdef INVARIANTS
4915 		} else {
4916 			panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4917 #endif
4918 		}
4919 		TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4920 		if (chk->data) {
4921 			if (so) {
4922 				/* Still a socket? */
4923 				sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4924 				    0, chk, SCTP_SO_LOCKED);
4925 			}
4926 			if (chk->data) {
4927 				sctp_m_freem(chk->data);
4928 				chk->data = NULL;
4929 			}
4930 		}
4931 		if (chk->holds_key_ref)
4932 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4933 		if (chk->whoTo) {
4934 			sctp_free_remote_addr(chk->whoTo);
4935 			chk->whoTo = NULL;
4936 		}
4937 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4938 		SCTP_DECR_CHK_COUNT();
4939 		/* sa_ignore FREED_MEMORY */
4940 	}
4941 	/* sent queue SHOULD be empty */
4942 	TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4943 		if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
4944 			if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4945 				asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4946 #ifdef INVARIANTS
4947 			} else {
4948 				panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4949 #endif
4950 			}
4951 		}
4952 		TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4953 		if (chk->data) {
4954 			if (so) {
4955 				/* Still a socket? */
4956 				sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
4957 				    0, chk, SCTP_SO_LOCKED);
4958 			}
4959 			if (chk->data) {
4960 				sctp_m_freem(chk->data);
4961 				chk->data = NULL;
4962 			}
4963 		}
4964 		if (chk->holds_key_ref)
4965 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4966 		sctp_free_remote_addr(chk->whoTo);
4967 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4968 		SCTP_DECR_CHK_COUNT();
4969 		/* sa_ignore FREED_MEMORY */
4970 	}
4971 #ifdef INVARIANTS
4972 	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
4973 		if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
4974 			panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
4975 		}
4976 	}
4977 #endif
4978 	/* control queue MAY not be empty */
4979 	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4980 		TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4981 		if (chk->data) {
4982 			sctp_m_freem(chk->data);
4983 			chk->data = NULL;
4984 		}
4985 		if (chk->holds_key_ref)
4986 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4987 		sctp_free_remote_addr(chk->whoTo);
4988 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4989 		SCTP_DECR_CHK_COUNT();
4990 		/* sa_ignore FREED_MEMORY */
4991 	}
4992 	/* ASCONF queue MAY not be empty */
4993 	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4994 		TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4995 		if (chk->data) {
4996 			sctp_m_freem(chk->data);
4997 			chk->data = NULL;
4998 		}
4999 		if (chk->holds_key_ref)
5000 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5001 		sctp_free_remote_addr(chk->whoTo);
5002 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5003 		SCTP_DECR_CHK_COUNT();
5004 		/* sa_ignore FREED_MEMORY */
5005 	}
5006 	TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5007 		TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5008 		if (chk->data) {
5009 			sctp_m_freem(chk->data);
5010 			chk->data = NULL;
5011 		}
5012 		if (chk->holds_key_ref)
5013 			sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5014 		sctp_free_remote_addr(chk->whoTo);
5015 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5016 		SCTP_DECR_CHK_COUNT();
5017 		/* sa_ignore FREED_MEMORY */
5018 	}
5019 
5020 	if (asoc->mapping_array) {
5021 		SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5022 		asoc->mapping_array = NULL;
5023 	}
5024 	if (asoc->nr_mapping_array) {
5025 		SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5026 		asoc->nr_mapping_array = NULL;
5027 	}
5028 	/* the stream outs */
5029 	if (asoc->strmout) {
5030 		SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5031 		asoc->strmout = NULL;
5032 	}
5033 	asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5034 	if (asoc->strmin) {
5035 		struct sctp_queued_to_read *ctl, *nctl;
5036 
5037 		for (i = 0; i < asoc->streamincnt; i++) {
5038 			TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5039 				TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5040 				sctp_free_remote_addr(ctl->whoFrom);
5041 				if (ctl->data) {
5042 					sctp_m_freem(ctl->data);
5043 					ctl->data = NULL;
5044 				}
5045 				/*
5046 				 * We don't free the address here since all
5047 				 * the net's were freed above.
5048 				 */
5049 				SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5050 				SCTP_DECR_READQ_COUNT();
5051 			}
5052 		}
5053 		SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5054 		asoc->strmin = NULL;
5055 	}
5056 	asoc->streamincnt = 0;
5057 	TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5058 #ifdef INVARIANTS
5059 		if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5060 			panic("no net's left alloc'ed, or list points to itself");
5061 		}
5062 #endif
5063 		TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5064 		sctp_free_remote_addr(net);
5065 	}
5066 	LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5067 		/* sa_ignore FREED_MEMORY */
5068 		sctp_remove_laddr(laddr);
5069 	}
5070 
5071 	/* pending asconf (address) parameters */
5072 	TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5073 		/* sa_ignore FREED_MEMORY */
5074 		TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5075 		SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5076 	}
5077 	TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5078 		/* sa_ignore FREED_MEMORY */
5079 		TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5080 		if (aack->data != NULL) {
5081 			sctp_m_freem(aack->data);
5082 		}
5083 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5084 	}
5085 	/* clean up auth stuff */
5086 	if (asoc->local_hmacs)
5087 		sctp_free_hmaclist(asoc->local_hmacs);
5088 	if (asoc->peer_hmacs)
5089 		sctp_free_hmaclist(asoc->peer_hmacs);
5090 
5091 	if (asoc->local_auth_chunks)
5092 		sctp_free_chunklist(asoc->local_auth_chunks);
5093 	if (asoc->peer_auth_chunks)
5094 		sctp_free_chunklist(asoc->peer_auth_chunks);
5095 
5096 	sctp_free_authinfo(&asoc->authinfo);
5097 
5098 	LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5099 		LIST_REMOVE(shared_key, next);
5100 		sctp_free_sharedkey(shared_key);
5101 		/* sa_ignore FREED_MEMORY */
5102 	}
5103 
5104 	/* Insert new items here :> */
5105 
5106 	/* Get rid of LOCK */
5107 	SCTP_TCB_UNLOCK(stcb);
5108 	SCTP_TCB_LOCK_DESTROY(stcb);
5109 	SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5110 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5111 		SCTP_INP_INFO_WUNLOCK();
5112 		SCTP_INP_RLOCK(inp);
5113 	}
5114 #ifdef SCTP_TRACK_FREED_ASOCS
5115 	if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5116 		/* now clean up the tasoc itself */
5117 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5118 		SCTP_DECR_ASOC_COUNT();
5119 	} else {
5120 		LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5121 	}
5122 #else
5123 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5124 	SCTP_DECR_ASOC_COUNT();
5125 #endif
5126 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5127 		if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5128 			/*
5129 			 * If its NOT the inp_free calling us AND sctp_close
5130 			 * as been called, we call back...
5131 			 */
5132 			SCTP_INP_RUNLOCK(inp);
5133 			/*
5134 			 * This will start the kill timer (if we are the
5135 			 * last one) since we hold an increment yet. But
5136 			 * this is the only safe way to do this since
5137 			 * otherwise if the socket closes at the same time
5138 			 * we are here we might collide in the cleanup.
5139 			 */
5140 			sctp_inpcb_free(inp,
5141 			    SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5142 			    SCTP_CALLED_DIRECTLY_NOCMPSET);
5143 			SCTP_INP_DECR_REF(inp);
5144 			goto out_of;
5145 		} else {
5146 			/* The socket is still open. */
5147 			SCTP_INP_DECR_REF(inp);
5148 		}
5149 	}
5150 	if (from_inpcbfree == SCTP_NORMAL_PROC) {
5151 		SCTP_INP_RUNLOCK(inp);
5152 	}
5153 out_of:
5154 	/* destroyed the asoc */
5155 #ifdef SCTP_LOG_CLOSING
5156 	sctp_log_closing(inp, NULL, 11);
5157 #endif
5158 	return (1);
5159 }
5160 
5161 
5162 
5163 /*
5164  * determine if a destination is "reachable" based upon the addresses bound
5165  * to the current endpoint (e.g. only v4 or v6 currently bound)
5166  */
5167 /*
5168  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5169  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5170  * types bound as its endpoint
5171  */
5172 int
5173 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5174 {
5175 	struct sctp_inpcb *inp;
5176 	int answer;
5177 
5178 	/*
5179 	 * No locks here, the TCB, in all cases is already locked and an
5180 	 * assoc is up. There is either a INP lock by the caller applied (in
5181 	 * asconf case when deleting an address) or NOT in the HB case,
5182 	 * however if HB then the INP increment is up and the INP will not
5183 	 * be removed (on top of the fact that we have a TCB lock). So we
5184 	 * only want to read the sctp_flags, which is either bound-all or
5185 	 * not.. no protection needed since once an assoc is up you can't be
5186 	 * changing your binding.
5187 	 */
5188 	inp = stcb->sctp_ep;
5189 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5190 		/* if bound all, destination is not restricted */
5191 		/*
5192 		 * RRS: Question during lock work: Is this correct? If you
5193 		 * are bound-all you still might need to obey the V4--V6
5194 		 * flags??? IMO this bound-all stuff needs to be removed!
5195 		 */
5196 		return (1);
5197 	}
5198 	/* NOTE: all "scope" checks are done when local addresses are added */
5199 	switch (destaddr->sa_family) {
5200 #ifdef INET6
5201 	case AF_INET6:
5202 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5203 		break;
5204 #endif
5205 #ifdef INET
5206 	case AF_INET:
5207 		answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5208 		break;
5209 #endif
5210 	default:
5211 		/* invalid family, so it's unreachable */
5212 		answer = 0;
5213 		break;
5214 	}
5215 	return (answer);
5216 }
5217 
5218 /*
5219  * update the inp_vflags on an endpoint
5220  */
5221 static void
5222 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5223 {
5224 	struct sctp_laddr *laddr;
5225 
5226 	/* first clear the flag */
5227 	inp->ip_inp.inp.inp_vflag = 0;
5228 	/* set the flag based on addresses on the ep list */
5229 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5230 		if (laddr->ifa == NULL) {
5231 			SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5232 			    __FUNCTION__);
5233 			continue;
5234 		}
5235 		if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5236 			continue;
5237 		}
5238 		switch (laddr->ifa->address.sa.sa_family) {
5239 #ifdef INET6
5240 		case AF_INET6:
5241 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5242 			break;
5243 #endif
5244 #ifdef INET
5245 		case AF_INET:
5246 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5247 			break;
5248 #endif
5249 		default:
5250 			break;
5251 		}
5252 	}
5253 }
5254 
5255 /*
5256  * Add the address to the endpoint local address list There is nothing to be
5257  * done if we are bound to all addresses
5258  */
5259 void
5260 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5261 {
5262 	struct sctp_laddr *laddr;
5263 	int fnd, error = 0;
5264 
5265 	fnd = 0;
5266 
5267 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5268 		/* You are already bound to all. You have it already */
5269 		return;
5270 	}
5271 #ifdef INET6
5272 	if (ifa->address.sa.sa_family == AF_INET6) {
5273 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5274 			/* Can't bind a non-useable addr. */
5275 			return;
5276 		}
5277 	}
5278 #endif
5279 	/* first, is it already present? */
5280 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5281 		if (laddr->ifa == ifa) {
5282 			fnd = 1;
5283 			break;
5284 		}
5285 	}
5286 
5287 	if (fnd == 0) {
5288 		/* Not in the ep list */
5289 		error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5290 		if (error != 0)
5291 			return;
5292 		inp->laddr_count++;
5293 		/* update inp_vflag flags */
5294 		switch (ifa->address.sa.sa_family) {
5295 #ifdef INET6
5296 		case AF_INET6:
5297 			inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5298 			break;
5299 #endif
5300 #ifdef INET
5301 		case AF_INET:
5302 			inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5303 			break;
5304 #endif
5305 		default:
5306 			break;
5307 		}
5308 	}
5309 	return;
5310 }
5311 
5312 
5313 /*
5314  * select a new (hopefully reachable) destination net (should only be used
5315  * when we deleted an ep addr that is the only usable source address to reach
5316  * the destination net)
5317  */
5318 static void
5319 sctp_select_primary_destination(struct sctp_tcb *stcb)
5320 {
5321 	struct sctp_nets *net;
5322 
5323 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5324 		/* for now, we'll just pick the first reachable one we find */
5325 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5326 			continue;
5327 		if (sctp_destination_is_reachable(stcb,
5328 		    (struct sockaddr *)&net->ro._l_addr)) {
5329 			/* found a reachable destination */
5330 			stcb->asoc.primary_destination = net;
5331 		}
5332 	}
5333 	/* I can't there from here! ...we're gonna die shortly... */
5334 }
5335 
5336 
5337 /*
5338  * Delete the address from the endpoint local address list There is nothing
5339  * to be done if we are bound to all addresses
5340  */
5341 void
5342 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5343 {
5344 	struct sctp_laddr *laddr;
5345 	int fnd;
5346 
5347 	fnd = 0;
5348 	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5349 		/* You are already bound to all. You have it already */
5350 		return;
5351 	}
5352 	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5353 		if (laddr->ifa == ifa) {
5354 			fnd = 1;
5355 			break;
5356 		}
5357 	}
5358 	if (fnd && (inp->laddr_count < 2)) {
5359 		/* can't delete unless there are at LEAST 2 addresses */
5360 		return;
5361 	}
5362 	if (fnd) {
5363 		/*
5364 		 * clean up any use of this address go through our
5365 		 * associations and clear any last_used_address that match
5366 		 * this one for each assoc, see if a new primary_destination
5367 		 * is needed
5368 		 */
5369 		struct sctp_tcb *stcb;
5370 
5371 		/* clean up "next_addr_touse" */
5372 		if (inp->next_addr_touse == laddr)
5373 			/* delete this address */
5374 			inp->next_addr_touse = NULL;
5375 
5376 		/* clean up "last_used_address" */
5377 		LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5378 			struct sctp_nets *net;
5379 
5380 			SCTP_TCB_LOCK(stcb);
5381 			if (stcb->asoc.last_used_address == laddr)
5382 				/* delete this address */
5383 				stcb->asoc.last_used_address = NULL;
5384 			/*
5385 			 * Now spin through all the nets and purge any ref
5386 			 * to laddr
5387 			 */
5388 			TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5389 				if (net->ro._s_addr &&
5390 				    (net->ro._s_addr->ifa == laddr->ifa)) {
5391 					/* Yep, purge src address selected */
5392 					sctp_rtentry_t *rt;
5393 
5394 					/* delete this address if cached */
5395 					rt = net->ro.ro_rt;
5396 					if (rt != NULL) {
5397 						RTFREE(rt);
5398 						net->ro.ro_rt = NULL;
5399 					}
5400 					sctp_free_ifa(net->ro._s_addr);
5401 					net->ro._s_addr = NULL;
5402 					net->src_addr_selected = 0;
5403 				}
5404 			}
5405 			SCTP_TCB_UNLOCK(stcb);
5406 		}		/* for each tcb */
5407 		/* remove it from the ep list */
5408 		sctp_remove_laddr(laddr);
5409 		inp->laddr_count--;
5410 		/* update inp_vflag flags */
5411 		sctp_update_ep_vflag(inp);
5412 	}
5413 	return;
5414 }
5415 
5416 /*
5417  * Add the address to the TCB local address restricted list.
5418  * This is a "pending" address list (eg. addresses waiting for an
5419  * ASCONF-ACK response) and cannot be used as a valid source address.
5420  */
5421 void
5422 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5423 {
5424 	struct sctp_laddr *laddr;
5425 	struct sctpladdr *list;
5426 
5427 	/*
5428 	 * Assumes TCB is locked.. and possibly the INP. May need to
5429 	 * confirm/fix that if we need it and is not the case.
5430 	 */
5431 	list = &stcb->asoc.sctp_restricted_addrs;
5432 
5433 #ifdef INET6
5434 	if (ifa->address.sa.sa_family == AF_INET6) {
5435 		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5436 			/* Can't bind a non-existent addr. */
5437 			return;
5438 		}
5439 	}
5440 #endif
5441 	/* does the address already exist? */
5442 	LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5443 		if (laddr->ifa == ifa) {
5444 			return;
5445 		}
5446 	}
5447 
5448 	/* add to the list */
5449 	(void)sctp_insert_laddr(list, ifa, 0);
5450 	return;
5451 }
5452 
5453 /*
5454  * insert an laddr entry with the given ifa for the desired list
5455  */
5456 int
5457 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5458 {
5459 	struct sctp_laddr *laddr;
5460 
5461 	laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5462 	if (laddr == NULL) {
5463 		/* out of memory? */
5464 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5465 		return (EINVAL);
5466 	}
5467 	SCTP_INCR_LADDR_COUNT();
5468 	bzero(laddr, sizeof(*laddr));
5469 	(void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5470 	laddr->ifa = ifa;
5471 	laddr->action = act;
5472 	atomic_add_int(&ifa->refcount, 1);
5473 	/* insert it */
5474 	LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5475 
5476 	return (0);
5477 }
5478 
5479 /*
5480  * Remove an laddr entry from the local address list (on an assoc)
5481  */
5482 void
5483 sctp_remove_laddr(struct sctp_laddr *laddr)
5484 {
5485 
5486 	/* remove from the list */
5487 	LIST_REMOVE(laddr, sctp_nxt_addr);
5488 	sctp_free_ifa(laddr->ifa);
5489 	SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5490 	SCTP_DECR_LADDR_COUNT();
5491 }
5492 
5493 /*
5494  * Remove a local address from the TCB local address restricted list
5495  */
5496 void
5497 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5498 {
5499 	struct sctp_inpcb *inp;
5500 	struct sctp_laddr *laddr;
5501 
5502 	/*
5503 	 * This is called by asconf work. It is assumed that a) The TCB is
5504 	 * locked and b) The INP is locked. This is true in as much as I can
5505 	 * trace through the entry asconf code where I did these locks.
5506 	 * Again, the ASCONF code is a bit different in that it does lock
5507 	 * the INP during its work often times. This must be since we don't
5508 	 * want other proc's looking up things while what they are looking
5509 	 * up is changing :-D
5510 	 */
5511 
5512 	inp = stcb->sctp_ep;
5513 	/* if subset bound and don't allow ASCONF's, can't delete last */
5514 	if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5515 	    sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5516 		if (stcb->sctp_ep->laddr_count < 2) {
5517 			/* can't delete last address */
5518 			return;
5519 		}
5520 	}
5521 	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5522 		/* remove the address if it exists */
5523 		if (laddr->ifa == NULL)
5524 			continue;
5525 		if (laddr->ifa == ifa) {
5526 			sctp_remove_laddr(laddr);
5527 			return;
5528 		}
5529 	}
5530 
5531 	/* address not found! */
5532 	return;
5533 }
5534 
5535 /*
5536  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5537  */
5538 /* sysctl */
5539 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5540 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5541 
5542 
5543 
5544 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5545 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5546 int *sctp_cpuarry = NULL;
5547 void
5548 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5549 {
5550 	/* Queue a packet to a processor for the specified core */
5551 	struct sctp_mcore_queue *qent;
5552 	struct sctp_mcore_ctrl *wkq;
5553 	int need_wake = 0;
5554 
5555 	if (sctp_mcore_workers == NULL) {
5556 		/* Something went way bad during setup */
5557 		sctp_input_with_port(m, off, 0);
5558 		return;
5559 	}
5560 	SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5561 	    (sizeof(struct sctp_mcore_queue)),
5562 	    SCTP_M_MCORE);
5563 	if (qent == NULL) {
5564 		/* This is trouble  */
5565 		sctp_input_with_port(m, off, 0);
5566 		return;
5567 	}
5568 	qent->vn = curvnet;
5569 	qent->m = m;
5570 	qent->off = off;
5571 	qent->v6 = 0;
5572 	wkq = &sctp_mcore_workers[cpu_to_use];
5573 	SCTP_MCORE_QLOCK(wkq);
5574 
5575 	TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5576 	if (wkq->running == 0) {
5577 		need_wake = 1;
5578 	}
5579 	SCTP_MCORE_QUNLOCK(wkq);
5580 	if (need_wake) {
5581 		wakeup(&wkq->running);
5582 	}
5583 }
5584 
5585 static void
5586 sctp_mcore_thread(void *arg)
5587 {
5588 
5589 	struct sctp_mcore_ctrl *wkq;
5590 	struct sctp_mcore_queue *qent;
5591 
5592 	wkq = (struct sctp_mcore_ctrl *)arg;
5593 	struct mbuf *m;
5594 	int off, v6;
5595 
5596 	/* Wait for first tickle */
5597 	SCTP_MCORE_LOCK(wkq);
5598 	wkq->running = 0;
5599 	msleep(&wkq->running,
5600 	    &wkq->core_mtx,
5601 	    0, "wait for pkt", 0);
5602 	SCTP_MCORE_UNLOCK(wkq);
5603 
5604 	/* Bind to our cpu */
5605 	thread_lock(curthread);
5606 	sched_bind(curthread, wkq->cpuid);
5607 	thread_unlock(curthread);
5608 
5609 	/* Now lets start working */
5610 	SCTP_MCORE_LOCK(wkq);
5611 	/* Now grab lock and go */
5612 	for (;;) {
5613 		SCTP_MCORE_QLOCK(wkq);
5614 skip_sleep:
5615 		wkq->running = 1;
5616 		qent = TAILQ_FIRST(&wkq->que);
5617 		if (qent) {
5618 			TAILQ_REMOVE(&wkq->que, qent, next);
5619 			SCTP_MCORE_QUNLOCK(wkq);
5620 			CURVNET_SET(qent->vn);
5621 			m = qent->m;
5622 			off = qent->off;
5623 			v6 = qent->v6;
5624 			SCTP_FREE(qent, SCTP_M_MCORE);
5625 			if (v6 == 0) {
5626 				sctp_input_with_port(m, off, 0);
5627 			} else {
5628 				SCTP_PRINTF("V6 not yet supported\n");
5629 				sctp_m_freem(m);
5630 			}
5631 			CURVNET_RESTORE();
5632 			SCTP_MCORE_QLOCK(wkq);
5633 		}
5634 		wkq->running = 0;
5635 		if (!TAILQ_EMPTY(&wkq->que)) {
5636 			goto skip_sleep;
5637 		}
5638 		SCTP_MCORE_QUNLOCK(wkq);
5639 		msleep(&wkq->running,
5640 		    &wkq->core_mtx,
5641 		    0, "wait for pkt", 0);
5642 	}
5643 }
5644 
5645 static void
5646 sctp_startup_mcore_threads(void)
5647 {
5648 	int i, cpu;
5649 
5650 	if (mp_ncpus == 1)
5651 		return;
5652 
5653 	if (sctp_mcore_workers != NULL) {
5654 		/*
5655 		 * Already been here in some previous vnet?
5656 		 */
5657 		return;
5658 	}
5659 	SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5660 	    ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5661 	    SCTP_M_MCORE);
5662 	if (sctp_mcore_workers == NULL) {
5663 		/* TSNH I hope */
5664 		return;
5665 	}
5666 	memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5667 	    sizeof(struct sctp_mcore_ctrl)));
5668 	/* Init the structures */
5669 	for (i = 0; i <= mp_maxid; i++) {
5670 		TAILQ_INIT(&sctp_mcore_workers[i].que);
5671 		SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5672 		SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5673 		sctp_mcore_workers[i].cpuid = i;
5674 	}
5675 	if (sctp_cpuarry == NULL) {
5676 		SCTP_MALLOC(sctp_cpuarry, int *,
5677 		    (mp_ncpus * sizeof(int)),
5678 		    SCTP_M_MCORE);
5679 		i = 0;
5680 		CPU_FOREACH(cpu) {
5681 			sctp_cpuarry[i] = cpu;
5682 			i++;
5683 		}
5684 	}
5685 	/* Now start them all */
5686 	CPU_FOREACH(cpu) {
5687 		(void)kproc_create(sctp_mcore_thread,
5688 		    (void *)&sctp_mcore_workers[cpu],
5689 		    &sctp_mcore_workers[cpu].thread_proc,
5690 		    RFPROC,
5691 		    SCTP_KTHREAD_PAGES,
5692 		    SCTP_MCORE_NAME);
5693 
5694 	}
5695 }
5696 
5697 #endif
5698 
5699 void
5700 sctp_pcb_init()
5701 {
5702 	/*
5703 	 * SCTP initialization for the PCB structures should be called by
5704 	 * the sctp_init() funciton.
5705 	 */
5706 	int i;
5707 	struct timeval tv;
5708 
5709 	if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5710 		/* error I was called twice */
5711 		return;
5712 	}
5713 	SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5714 
5715 #if defined(SCTP_LOCAL_TRACE_BUF)
5716 	bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5717 #endif
5718 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5719 	SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5720 	    ((mp_maxid + 1) * sizeof(struct sctpstat)),
5721 	    SCTP_M_MCORE);
5722 #endif
5723 	(void)SCTP_GETTIME_TIMEVAL(&tv);
5724 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5725 	bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5726 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5727 	SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5728 #else
5729 	bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5730 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5731 	SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5732 #endif
5733 	/* init the empty list of (All) Endpoints */
5734 	LIST_INIT(&SCTP_BASE_INFO(listhead));
5735 
5736 
5737 	/* init the hash table of endpoints */
5738 	TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5739 	TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5740 	TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5741 	SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5742 	    &SCTP_BASE_INFO(hashasocmark));
5743 	SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5744 	    &SCTP_BASE_INFO(hashmark));
5745 	SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5746 	    &SCTP_BASE_INFO(hashtcpmark));
5747 	SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5748 
5749 
5750 	SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5751 	    &SCTP_BASE_INFO(hashvrfmark));
5752 
5753 	SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5754 	    &SCTP_BASE_INFO(vrf_ifn_hashmark));
5755 	/* init the zones */
5756 	/*
5757 	 * FIX ME: Should check for NULL returns, but if it does fail we are
5758 	 * doomed to panic anyways... add later maybe.
5759 	 */
5760 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5761 	    sizeof(struct sctp_inpcb), maxsockets);
5762 
5763 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5764 	    sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5765 
5766 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5767 	    sizeof(struct sctp_laddr),
5768 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5769 
5770 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5771 	    sizeof(struct sctp_nets),
5772 	    (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5773 
5774 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5775 	    sizeof(struct sctp_tmit_chunk),
5776 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5777 
5778 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5779 	    sizeof(struct sctp_queued_to_read),
5780 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5781 
5782 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5783 	    sizeof(struct sctp_stream_queue_pending),
5784 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5785 
5786 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5787 	    sizeof(struct sctp_asconf),
5788 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5789 
5790 	SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5791 	    sizeof(struct sctp_asconf_ack),
5792 	    (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5793 
5794 
5795 	/* Master Lock INIT for info structure */
5796 	SCTP_INP_INFO_LOCK_INIT();
5797 	SCTP_STATLOG_INIT_LOCK();
5798 
5799 	SCTP_IPI_COUNT_INIT();
5800 	SCTP_IPI_ADDR_INIT();
5801 #ifdef SCTP_PACKET_LOGGING
5802 	SCTP_IP_PKTLOG_INIT();
5803 #endif
5804 	LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5805 
5806 	SCTP_WQ_ADDR_INIT();
5807 	/* not sure if we need all the counts */
5808 	SCTP_BASE_INFO(ipi_count_ep) = 0;
5809 	/* assoc/tcb zone info */
5810 	SCTP_BASE_INFO(ipi_count_asoc) = 0;
5811 	/* local addrlist zone info */
5812 	SCTP_BASE_INFO(ipi_count_laddr) = 0;
5813 	/* remote addrlist zone info */
5814 	SCTP_BASE_INFO(ipi_count_raddr) = 0;
5815 	/* chunk info */
5816 	SCTP_BASE_INFO(ipi_count_chunk) = 0;
5817 
5818 	/* socket queue zone info */
5819 	SCTP_BASE_INFO(ipi_count_readq) = 0;
5820 
5821 	/* stream out queue cont */
5822 	SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5823 
5824 	SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5825 	SCTP_BASE_INFO(ipi_free_chunks) = 0;
5826 
5827 	SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5828 
5829 	/* Init the TIMEWAIT list */
5830 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5831 		LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5832 	}
5833 	sctp_startup_iterator();
5834 
5835 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5836 	sctp_startup_mcore_threads();
5837 #endif
5838 
5839 	/*
5840 	 * INIT the default VRF which for BSD is the only one, other O/S's
5841 	 * may have more. But initially they must start with one and then
5842 	 * add the VRF's as addresses are added.
5843 	 */
5844 	sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5845 }
5846 
5847 /*
5848  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5849  */
5850 void
5851 sctp_pcb_finish(void)
5852 {
5853 	struct sctp_vrflist *vrf_bucket;
5854 	struct sctp_vrf *vrf, *nvrf;
5855 	struct sctp_ifn *ifn, *nifn;
5856 	struct sctp_ifa *ifa, *nifa;
5857 	struct sctpvtaghead *chain;
5858 	struct sctp_tagblock *twait_block, *prev_twait_block;
5859 	struct sctp_laddr *wi, *nwi;
5860 	int i;
5861 	struct sctp_iterator *it, *nit;
5862 
5863 	/*
5864 	 * In FreeBSD the iterator thread never exits but we do clean up.
5865 	 * The only way FreeBSD reaches here is if we have VRF's but we
5866 	 * still add the ifdef to make it compile on old versions.
5867 	 */
5868 	SCTP_IPI_ITERATOR_WQ_LOCK();
5869 	TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5870 		if (it->vn != curvnet) {
5871 			continue;
5872 		}
5873 		TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5874 		if (it->function_atend != NULL) {
5875 			(*it->function_atend) (it->pointer, it->val);
5876 		}
5877 		SCTP_FREE(it, SCTP_M_ITER);
5878 	}
5879 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
5880 	SCTP_ITERATOR_LOCK();
5881 	if ((sctp_it_ctl.cur_it) &&
5882 	    (sctp_it_ctl.cur_it->vn == curvnet)) {
5883 		sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5884 	}
5885 	SCTP_ITERATOR_UNLOCK();
5886 	SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5887 	SCTP_WQ_ADDR_LOCK();
5888 	LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5889 		LIST_REMOVE(wi, sctp_nxt_addr);
5890 		SCTP_DECR_LADDR_COUNT();
5891 		SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5892 	}
5893 	SCTP_WQ_ADDR_UNLOCK();
5894 
5895 	/*
5896 	 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5897 	 * destroyed first).
5898 	 */
5899 	vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5900 	LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5901 		LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5902 			LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5903 				/* free the ifa */
5904 				LIST_REMOVE(ifa, next_bucket);
5905 				LIST_REMOVE(ifa, next_ifa);
5906 				SCTP_FREE(ifa, SCTP_M_IFA);
5907 			}
5908 			/* free the ifn */
5909 			LIST_REMOVE(ifn, next_bucket);
5910 			LIST_REMOVE(ifn, next_ifn);
5911 			SCTP_FREE(ifn, SCTP_M_IFN);
5912 		}
5913 		SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5914 		/* free the vrf */
5915 		LIST_REMOVE(vrf, next_vrf);
5916 		SCTP_FREE(vrf, SCTP_M_VRF);
5917 	}
5918 	/* free the vrf hashes */
5919 	SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5920 	SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5921 
5922 	/*
5923 	 * free the TIMEWAIT list elements malloc'd in the function
5924 	 * sctp_add_vtag_to_timewait()...
5925 	 */
5926 	for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5927 		chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5928 		if (!LIST_EMPTY(chain)) {
5929 			prev_twait_block = NULL;
5930 			LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5931 				if (prev_twait_block) {
5932 					SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5933 				}
5934 				prev_twait_block = twait_block;
5935 			}
5936 			SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5937 		}
5938 	}
5939 
5940 	/* free the locks and mutexes */
5941 #ifdef SCTP_PACKET_LOGGING
5942 	SCTP_IP_PKTLOG_DESTROY();
5943 #endif
5944 	SCTP_IPI_ADDR_DESTROY();
5945 	SCTP_STATLOG_DESTROY();
5946 	SCTP_INP_INFO_LOCK_DESTROY();
5947 
5948 	SCTP_WQ_ADDR_DESTROY();
5949 
5950 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5951 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5952 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5953 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5954 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5955 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5956 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5957 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5958 	SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5959 	/* Get rid of other stuff to */
5960 	if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5961 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5962 	if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5963 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5964 	if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5965 		SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5966 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5967 	SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5968 #endif
5969 }
5970 
5971 
5972 int
5973 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5974     int offset, int limit,
5975     struct sockaddr *src, struct sockaddr *dst,
5976     struct sockaddr *altsa)
5977 {
5978 	/*
5979 	 * grub through the INIT pulling addresses and loading them to the
5980 	 * nets structure in the asoc. The from address in the mbuf should
5981 	 * also be loaded (if it is not already). This routine can be called
5982 	 * with either INIT or INIT-ACK's as long as the m points to the IP
5983 	 * packet and the offset points to the beginning of the parameters.
5984 	 */
5985 	struct sctp_inpcb *inp;
5986 	struct sctp_nets *net, *nnet, *net_tmp;
5987 	struct sctp_paramhdr *phdr, parm_buf;
5988 	struct sctp_tcb *stcb_tmp;
5989 	uint16_t ptype, plen;
5990 	struct sockaddr *sa;
5991 	uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5992 	struct sctp_auth_random *p_random = NULL;
5993 	uint16_t random_len = 0;
5994 	uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5995 	struct sctp_auth_hmac_algo *hmacs = NULL;
5996 	uint16_t hmacs_len = 0;
5997 	uint8_t saw_asconf = 0;
5998 	uint8_t saw_asconf_ack = 0;
5999 	uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6000 	struct sctp_auth_chunk_list *chunks = NULL;
6001 	uint16_t num_chunks = 0;
6002 	sctp_key_t *new_key;
6003 	uint32_t keylen;
6004 	int got_random = 0, got_hmacs = 0, got_chklist = 0;
6005 	uint8_t ecn_allowed;
6006 
6007 #ifdef INET
6008 	struct sockaddr_in sin;
6009 
6010 #endif
6011 #ifdef INET6
6012 	struct sockaddr_in6 sin6;
6013 
6014 #endif
6015 
6016 	/* First get the destination address setup too. */
6017 #ifdef INET
6018 	memset(&sin, 0, sizeof(sin));
6019 	sin.sin_family = AF_INET;
6020 	sin.sin_len = sizeof(sin);
6021 	sin.sin_port = stcb->rport;
6022 #endif
6023 #ifdef INET6
6024 	memset(&sin6, 0, sizeof(sin6));
6025 	sin6.sin6_family = AF_INET6;
6026 	sin6.sin6_len = sizeof(struct sockaddr_in6);
6027 	sin6.sin6_port = stcb->rport;
6028 #endif
6029 	if (altsa) {
6030 		sa = altsa;
6031 	} else {
6032 		sa = src;
6033 	}
6034 	/* Turn off ECN until we get through all params */
6035 	ecn_allowed = 0;
6036 	TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6037 		/* mark all addresses that we have currently on the list */
6038 		net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6039 	}
6040 	/* does the source address already exist? if so skip it */
6041 	inp = stcb->sctp_ep;
6042 	atomic_add_int(&stcb->asoc.refcnt, 1);
6043 	stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6044 	atomic_add_int(&stcb->asoc.refcnt, -1);
6045 
6046 	if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6047 		/* we must add the source address */
6048 		/* no scope set here since we have a tcb already. */
6049 		switch (sa->sa_family) {
6050 #ifdef INET
6051 		case AF_INET:
6052 			if (stcb->asoc.scope.ipv4_addr_legal) {
6053 				if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6054 					return (-1);
6055 				}
6056 			}
6057 			break;
6058 #endif
6059 #ifdef INET6
6060 		case AF_INET6:
6061 			if (stcb->asoc.scope.ipv6_addr_legal) {
6062 				if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6063 					return (-2);
6064 				}
6065 			}
6066 			break;
6067 #endif
6068 		default:
6069 			break;
6070 		}
6071 	} else {
6072 		if (net_tmp != NULL && stcb_tmp == stcb) {
6073 			net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6074 		} else if (stcb_tmp != stcb) {
6075 			/* It belongs to another association? */
6076 			if (stcb_tmp)
6077 				SCTP_TCB_UNLOCK(stcb_tmp);
6078 			return (-3);
6079 		}
6080 	}
6081 	if (stcb->asoc.state == 0) {
6082 		/* the assoc was freed? */
6083 		return (-4);
6084 	}
6085 	/*
6086 	 * peer must explicitly turn this on. This may have been initialized
6087 	 * to be "on" in order to allow local addr changes while INIT's are
6088 	 * in flight.
6089 	 */
6090 	stcb->asoc.peer_supports_asconf = 0;
6091 	/* now we must go through each of the params. */
6092 	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6093 	while (phdr) {
6094 		ptype = ntohs(phdr->param_type);
6095 		plen = ntohs(phdr->param_length);
6096 		/*
6097 		 * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6098 		 * (uint32_t)ptype, (int)plen);
6099 		 */
6100 		if (offset + plen > limit) {
6101 			break;
6102 		}
6103 		if (plen == 0) {
6104 			break;
6105 		}
6106 #ifdef INET
6107 		if (ptype == SCTP_IPV4_ADDRESS) {
6108 			if (stcb->asoc.scope.ipv4_addr_legal) {
6109 				struct sctp_ipv4addr_param *p4, p4_buf;
6110 
6111 				/* ok get the v4 address and check/add */
6112 				phdr = sctp_get_next_param(m, offset,
6113 				    (struct sctp_paramhdr *)&p4_buf,
6114 				    sizeof(p4_buf));
6115 				if (plen != sizeof(struct sctp_ipv4addr_param) ||
6116 				    phdr == NULL) {
6117 					return (-5);
6118 				}
6119 				p4 = (struct sctp_ipv4addr_param *)phdr;
6120 				sin.sin_addr.s_addr = p4->addr;
6121 				if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6122 					/* Skip multi-cast addresses */
6123 					goto next_param;
6124 				}
6125 				if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6126 				    (sin.sin_addr.s_addr == INADDR_ANY)) {
6127 					goto next_param;
6128 				}
6129 				sa = (struct sockaddr *)&sin;
6130 				inp = stcb->sctp_ep;
6131 				atomic_add_int(&stcb->asoc.refcnt, 1);
6132 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6133 				    dst, stcb);
6134 				atomic_add_int(&stcb->asoc.refcnt, -1);
6135 
6136 				if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6137 				    inp == NULL) {
6138 					/* we must add the source address */
6139 					/*
6140 					 * no scope set since we have a tcb
6141 					 * already
6142 					 */
6143 
6144 					/*
6145 					 * we must validate the state again
6146 					 * here
6147 					 */
6148 			add_it_now:
6149 					if (stcb->asoc.state == 0) {
6150 						/* the assoc was freed? */
6151 						return (-7);
6152 					}
6153 					if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6154 						return (-8);
6155 					}
6156 				} else if (stcb_tmp == stcb) {
6157 					if (stcb->asoc.state == 0) {
6158 						/* the assoc was freed? */
6159 						return (-10);
6160 					}
6161 					if (net != NULL) {
6162 						/* clear flag */
6163 						net->dest_state &=
6164 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6165 					}
6166 				} else {
6167 					/*
6168 					 * strange, address is in another
6169 					 * assoc? straighten out locks.
6170 					 */
6171 					if (stcb_tmp) {
6172 						if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6173 							/*
6174 							 * in setup state we
6175 							 * abort this guy
6176 							 */
6177 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6178 							    stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6179 							goto add_it_now;
6180 						}
6181 						SCTP_TCB_UNLOCK(stcb_tmp);
6182 					}
6183 					if (stcb->asoc.state == 0) {
6184 						/* the assoc was freed? */
6185 						return (-12);
6186 					}
6187 					return (-13);
6188 				}
6189 			}
6190 		} else
6191 #endif
6192 #ifdef INET6
6193 		if (ptype == SCTP_IPV6_ADDRESS) {
6194 			if (stcb->asoc.scope.ipv6_addr_legal) {
6195 				/* ok get the v6 address and check/add */
6196 				struct sctp_ipv6addr_param *p6, p6_buf;
6197 
6198 				phdr = sctp_get_next_param(m, offset,
6199 				    (struct sctp_paramhdr *)&p6_buf,
6200 				    sizeof(p6_buf));
6201 				if (plen != sizeof(struct sctp_ipv6addr_param) ||
6202 				    phdr == NULL) {
6203 					return (-14);
6204 				}
6205 				p6 = (struct sctp_ipv6addr_param *)phdr;
6206 				memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6207 				    sizeof(p6->addr));
6208 				if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6209 					/* Skip multi-cast addresses */
6210 					goto next_param;
6211 				}
6212 				if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6213 					/*
6214 					 * Link local make no sense without
6215 					 * scope
6216 					 */
6217 					goto next_param;
6218 				}
6219 				sa = (struct sockaddr *)&sin6;
6220 				inp = stcb->sctp_ep;
6221 				atomic_add_int(&stcb->asoc.refcnt, 1);
6222 				stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6223 				    dst, stcb);
6224 				atomic_add_int(&stcb->asoc.refcnt, -1);
6225 				if (stcb_tmp == NULL &&
6226 				    (inp == stcb->sctp_ep || inp == NULL)) {
6227 					/*
6228 					 * we must validate the state again
6229 					 * here
6230 					 */
6231 			add_it_now6:
6232 					if (stcb->asoc.state == 0) {
6233 						/* the assoc was freed? */
6234 						return (-16);
6235 					}
6236 					/*
6237 					 * we must add the address, no scope
6238 					 * set
6239 					 */
6240 					if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6241 						return (-17);
6242 					}
6243 				} else if (stcb_tmp == stcb) {
6244 					/*
6245 					 * we must validate the state again
6246 					 * here
6247 					 */
6248 					if (stcb->asoc.state == 0) {
6249 						/* the assoc was freed? */
6250 						return (-19);
6251 					}
6252 					if (net != NULL) {
6253 						/* clear flag */
6254 						net->dest_state &=
6255 						    ~SCTP_ADDR_NOT_IN_ASSOC;
6256 					}
6257 				} else {
6258 					/*
6259 					 * strange, address is in another
6260 					 * assoc? straighten out locks.
6261 					 */
6262 					if (stcb_tmp)
6263 						if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6264 							/*
6265 							 * in setup state we
6266 							 * abort this guy
6267 							 */
6268 							sctp_abort_an_association(stcb_tmp->sctp_ep,
6269 							    stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6270 							goto add_it_now6;
6271 						}
6272 					SCTP_TCB_UNLOCK(stcb_tmp);
6273 
6274 					if (stcb->asoc.state == 0) {
6275 						/* the assoc was freed? */
6276 						return (-21);
6277 					}
6278 					return (-22);
6279 				}
6280 			}
6281 		} else
6282 #endif
6283 		if (ptype == SCTP_ECN_CAPABLE) {
6284 			ecn_allowed = 1;
6285 		} else if (ptype == SCTP_ULP_ADAPTATION) {
6286 			if (stcb->asoc.state != SCTP_STATE_OPEN) {
6287 				struct sctp_adaptation_layer_indication ai,
6288 				                                *aip;
6289 
6290 				phdr = sctp_get_next_param(m, offset,
6291 				    (struct sctp_paramhdr *)&ai, sizeof(ai));
6292 				aip = (struct sctp_adaptation_layer_indication *)phdr;
6293 				if (aip) {
6294 					stcb->asoc.peers_adaptation = ntohl(aip->indication);
6295 					stcb->asoc.adaptation_needed = 1;
6296 				}
6297 			}
6298 		} else if (ptype == SCTP_SET_PRIM_ADDR) {
6299 			struct sctp_asconf_addr_param lstore, *fee;
6300 			int lptype;
6301 			struct sockaddr *lsa = NULL;
6302 
6303 #ifdef INET
6304 			struct sctp_asconf_addrv4_param *fii;
6305 
6306 #endif
6307 
6308 			stcb->asoc.peer_supports_asconf = 1;
6309 			if (plen > sizeof(lstore)) {
6310 				return (-23);
6311 			}
6312 			phdr = sctp_get_next_param(m, offset,
6313 			    (struct sctp_paramhdr *)&lstore,
6314 			    min(plen, sizeof(lstore)));
6315 			if (phdr == NULL) {
6316 				return (-24);
6317 			}
6318 			fee = (struct sctp_asconf_addr_param *)phdr;
6319 			lptype = ntohs(fee->addrp.ph.param_type);
6320 			switch (lptype) {
6321 #ifdef INET
6322 			case SCTP_IPV4_ADDRESS:
6323 				if (plen !=
6324 				    sizeof(struct sctp_asconf_addrv4_param)) {
6325 					SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6326 					    (int)sizeof(struct sctp_asconf_addrv4_param),
6327 					    plen);
6328 				} else {
6329 					fii = (struct sctp_asconf_addrv4_param *)fee;
6330 					sin.sin_addr.s_addr = fii->addrp.addr;
6331 					lsa = (struct sockaddr *)&sin;
6332 				}
6333 				break;
6334 #endif
6335 #ifdef INET6
6336 			case SCTP_IPV6_ADDRESS:
6337 				if (plen !=
6338 				    sizeof(struct sctp_asconf_addr_param)) {
6339 					SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6340 					    (int)sizeof(struct sctp_asconf_addr_param),
6341 					    plen);
6342 				} else {
6343 					memcpy(sin6.sin6_addr.s6_addr,
6344 					    fee->addrp.addr,
6345 					    sizeof(fee->addrp.addr));
6346 					lsa = (struct sockaddr *)&sin6;
6347 				}
6348 				break;
6349 #endif
6350 			default:
6351 				break;
6352 			}
6353 			if (lsa) {
6354 				(void)sctp_set_primary_addr(stcb, sa, NULL);
6355 			}
6356 		} else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6357 			stcb->asoc.peer_supports_nat = 1;
6358 		} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6359 			/* Peer supports pr-sctp */
6360 			stcb->asoc.peer_supports_prsctp = 1;
6361 		} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6362 			/* A supported extension chunk */
6363 			struct sctp_supported_chunk_types_param *pr_supported;
6364 			uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6365 			int num_ent, i;
6366 
6367 			phdr = sctp_get_next_param(m, offset,
6368 			    (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6369 			if (phdr == NULL) {
6370 				return (-25);
6371 			}
6372 			stcb->asoc.peer_supports_asconf = 0;
6373 			stcb->asoc.peer_supports_prsctp = 0;
6374 			stcb->asoc.peer_supports_pktdrop = 0;
6375 			stcb->asoc.peer_supports_strreset = 0;
6376 			stcb->asoc.peer_supports_nr_sack = 0;
6377 			stcb->asoc.peer_supports_auth = 0;
6378 			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6379 			num_ent = plen - sizeof(struct sctp_paramhdr);
6380 			for (i = 0; i < num_ent; i++) {
6381 				switch (pr_supported->chunk_types[i]) {
6382 				case SCTP_ASCONF:
6383 				case SCTP_ASCONF_ACK:
6384 					stcb->asoc.peer_supports_asconf = 1;
6385 					break;
6386 				case SCTP_FORWARD_CUM_TSN:
6387 					stcb->asoc.peer_supports_prsctp = 1;
6388 					break;
6389 				case SCTP_PACKET_DROPPED:
6390 					stcb->asoc.peer_supports_pktdrop = 1;
6391 					break;
6392 				case SCTP_NR_SELECTIVE_ACK:
6393 					stcb->asoc.peer_supports_nr_sack = 1;
6394 					break;
6395 				case SCTP_STREAM_RESET:
6396 					stcb->asoc.peer_supports_strreset = 1;
6397 					break;
6398 				case SCTP_AUTHENTICATION:
6399 					stcb->asoc.peer_supports_auth = 1;
6400 					break;
6401 				default:
6402 					/* one I have not learned yet */
6403 					break;
6404 
6405 				}
6406 			}
6407 		} else if (ptype == SCTP_RANDOM) {
6408 			if (plen > sizeof(random_store))
6409 				break;
6410 			if (got_random) {
6411 				/* already processed a RANDOM */
6412 				goto next_param;
6413 			}
6414 			phdr = sctp_get_next_param(m, offset,
6415 			    (struct sctp_paramhdr *)random_store,
6416 			    min(sizeof(random_store), plen));
6417 			if (phdr == NULL)
6418 				return (-26);
6419 			p_random = (struct sctp_auth_random *)phdr;
6420 			random_len = plen - sizeof(*p_random);
6421 			/* enforce the random length */
6422 			if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6423 				SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6424 				return (-27);
6425 			}
6426 			got_random = 1;
6427 		} else if (ptype == SCTP_HMAC_LIST) {
6428 			int num_hmacs;
6429 			int i;
6430 
6431 			if (plen > sizeof(hmacs_store))
6432 				break;
6433 			if (got_hmacs) {
6434 				/* already processed a HMAC list */
6435 				goto next_param;
6436 			}
6437 			phdr = sctp_get_next_param(m, offset,
6438 			    (struct sctp_paramhdr *)hmacs_store,
6439 			    min(plen, sizeof(hmacs_store)));
6440 			if (phdr == NULL)
6441 				return (-28);
6442 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
6443 			hmacs_len = plen - sizeof(*hmacs);
6444 			num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6445 			/* validate the hmac list */
6446 			if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6447 				return (-29);
6448 			}
6449 			if (stcb->asoc.peer_hmacs != NULL)
6450 				sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6451 			stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6452 			if (stcb->asoc.peer_hmacs != NULL) {
6453 				for (i = 0; i < num_hmacs; i++) {
6454 					(void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6455 					    ntohs(hmacs->hmac_ids[i]));
6456 				}
6457 			}
6458 			got_hmacs = 1;
6459 		} else if (ptype == SCTP_CHUNK_LIST) {
6460 			int i;
6461 
6462 			if (plen > sizeof(chunks_store))
6463 				break;
6464 			if (got_chklist) {
6465 				/* already processed a Chunks list */
6466 				goto next_param;
6467 			}
6468 			phdr = sctp_get_next_param(m, offset,
6469 			    (struct sctp_paramhdr *)chunks_store,
6470 			    min(plen, sizeof(chunks_store)));
6471 			if (phdr == NULL)
6472 				return (-30);
6473 			chunks = (struct sctp_auth_chunk_list *)phdr;
6474 			num_chunks = plen - sizeof(*chunks);
6475 			if (stcb->asoc.peer_auth_chunks != NULL)
6476 				sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6477 			else
6478 				stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6479 			for (i = 0; i < num_chunks; i++) {
6480 				(void)sctp_auth_add_chunk(chunks->chunk_types[i],
6481 				    stcb->asoc.peer_auth_chunks);
6482 				/* record asconf/asconf-ack if listed */
6483 				if (chunks->chunk_types[i] == SCTP_ASCONF)
6484 					saw_asconf = 1;
6485 				if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6486 					saw_asconf_ack = 1;
6487 
6488 			}
6489 			got_chklist = 1;
6490 		} else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6491 			    (ptype == SCTP_STATE_COOKIE) ||
6492 			    (ptype == SCTP_UNRECOG_PARAM) ||
6493 			    (ptype == SCTP_COOKIE_PRESERVE) ||
6494 			    (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6495 			    (ptype == SCTP_ADD_IP_ADDRESS) ||
6496 			    (ptype == SCTP_DEL_IP_ADDRESS) ||
6497 			    (ptype == SCTP_ERROR_CAUSE_IND) ||
6498 		    (ptype == SCTP_SUCCESS_REPORT)) {
6499 			 /* don't care */ ;
6500 		} else {
6501 			if ((ptype & 0x8000) == 0x0000) {
6502 				/*
6503 				 * must stop processing the rest of the
6504 				 * param's. Any report bits were handled
6505 				 * with the call to
6506 				 * sctp_arethere_unrecognized_parameters()
6507 				 * when the INIT or INIT-ACK was first seen.
6508 				 */
6509 				break;
6510 			}
6511 		}
6512 
6513 next_param:
6514 		offset += SCTP_SIZE32(plen);
6515 		if (offset >= limit) {
6516 			break;
6517 		}
6518 		phdr = sctp_get_next_param(m, offset, &parm_buf,
6519 		    sizeof(parm_buf));
6520 	}
6521 	/* Now check to see if we need to purge any addresses */
6522 	TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6523 		if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6524 		    SCTP_ADDR_NOT_IN_ASSOC) {
6525 			/* This address has been removed from the asoc */
6526 			/* remove and free it */
6527 			stcb->asoc.numnets--;
6528 			TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6529 			sctp_free_remote_addr(net);
6530 			if (net == stcb->asoc.primary_destination) {
6531 				stcb->asoc.primary_destination = NULL;
6532 				sctp_select_primary_destination(stcb);
6533 			}
6534 		}
6535 	}
6536 	if (ecn_allowed == 0) {
6537 		stcb->asoc.ecn_allowed = 0;
6538 	}
6539 	/* validate authentication required parameters */
6540 	if (got_random && got_hmacs) {
6541 		stcb->asoc.peer_supports_auth = 1;
6542 	} else {
6543 		stcb->asoc.peer_supports_auth = 0;
6544 	}
6545 	if (!stcb->asoc.peer_supports_auth && got_chklist) {
6546 		/* peer does not support auth but sent a chunks list? */
6547 		return (-31);
6548 	}
6549 	if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6550 	    !stcb->asoc.peer_supports_auth) {
6551 		/* peer supports asconf but not auth? */
6552 		return (-32);
6553 	} else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6554 	    ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6555 		return (-33);
6556 	}
6557 	/* concatenate the full random key */
6558 	keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6559 	if (chunks != NULL) {
6560 		keylen += sizeof(*chunks) + num_chunks;
6561 	}
6562 	new_key = sctp_alloc_key(keylen);
6563 	if (new_key != NULL) {
6564 		/* copy in the RANDOM */
6565 		if (p_random != NULL) {
6566 			keylen = sizeof(*p_random) + random_len;
6567 			bcopy(p_random, new_key->key, keylen);
6568 		}
6569 		/* append in the AUTH chunks */
6570 		if (chunks != NULL) {
6571 			bcopy(chunks, new_key->key + keylen,
6572 			    sizeof(*chunks) + num_chunks);
6573 			keylen += sizeof(*chunks) + num_chunks;
6574 		}
6575 		/* append in the HMACs */
6576 		if (hmacs != NULL) {
6577 			bcopy(hmacs, new_key->key + keylen,
6578 			    sizeof(*hmacs) + hmacs_len);
6579 		}
6580 	} else {
6581 		/* failed to get memory for the key */
6582 		return (-34);
6583 	}
6584 	if (stcb->asoc.authinfo.peer_random != NULL)
6585 		sctp_free_key(stcb->asoc.authinfo.peer_random);
6586 	stcb->asoc.authinfo.peer_random = new_key;
6587 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6588 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6589 
6590 	return (0);
6591 }
6592 
6593 int
6594 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6595     struct sctp_nets *net)
6596 {
6597 	/* make sure the requested primary address exists in the assoc */
6598 	if (net == NULL && sa)
6599 		net = sctp_findnet(stcb, sa);
6600 
6601 	if (net == NULL) {
6602 		/* didn't find the requested primary address! */
6603 		return (-1);
6604 	} else {
6605 		/* set the primary address */
6606 		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6607 			/* Must be confirmed, so queue to set */
6608 			net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6609 			return (0);
6610 		}
6611 		stcb->asoc.primary_destination = net;
6612 		if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6613 			sctp_free_remote_addr(stcb->asoc.alternate);
6614 			stcb->asoc.alternate = NULL;
6615 		}
6616 		net = TAILQ_FIRST(&stcb->asoc.nets);
6617 		if (net != stcb->asoc.primary_destination) {
6618 			/*
6619 			 * first one on the list is NOT the primary
6620 			 * sctp_cmpaddr() is much more efficient if the
6621 			 * primary is the first on the list, make it so.
6622 			 */
6623 			TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6624 			TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6625 		}
6626 		return (0);
6627 	}
6628 }
6629 
6630 int
6631 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6632 {
6633 	/*
6634 	 * This function serves two purposes. It will see if a TAG can be
6635 	 * re-used and return 1 for yes it is ok and 0 for don't use that
6636 	 * tag. A secondary function it will do is purge out old tags that
6637 	 * can be removed.
6638 	 */
6639 	struct sctpvtaghead *chain;
6640 	struct sctp_tagblock *twait_block;
6641 	struct sctpasochead *head;
6642 	struct sctp_tcb *stcb;
6643 	int i;
6644 
6645 	SCTP_INP_INFO_RLOCK();
6646 	head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6647 	    SCTP_BASE_INFO(hashasocmark))];
6648 	if (head == NULL) {
6649 		/* invalid vtag */
6650 		goto skip_vtag_check;
6651 	}
6652 	LIST_FOREACH(stcb, head, sctp_asocs) {
6653 		/*
6654 		 * We choose not to lock anything here. TCB's can't be
6655 		 * removed since we have the read lock, so they can't be
6656 		 * freed on us, same thing for the INP. I may be wrong with
6657 		 * this assumption, but we will go with it for now :-)
6658 		 */
6659 		if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6660 			continue;
6661 		}
6662 		if (stcb->asoc.my_vtag == tag) {
6663 			/* candidate */
6664 			if (stcb->rport != rport) {
6665 				continue;
6666 			}
6667 			if (stcb->sctp_ep->sctp_lport != lport) {
6668 				continue;
6669 			}
6670 			/* Its a used tag set */
6671 			SCTP_INP_INFO_RUNLOCK();
6672 			return (0);
6673 		}
6674 	}
6675 skip_vtag_check:
6676 
6677 	chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6678 	/* Now what about timed wait ? */
6679 	LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6680 		/*
6681 		 * Block(s) are present, lets see if we have this tag in the
6682 		 * list
6683 		 */
6684 		for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6685 			if (twait_block->vtag_block[i].v_tag == 0) {
6686 				/* not used */
6687 				continue;
6688 			} else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6689 			    now->tv_sec) {
6690 				/* Audit expires this guy */
6691 				twait_block->vtag_block[i].tv_sec_at_expire = 0;
6692 				twait_block->vtag_block[i].v_tag = 0;
6693 				twait_block->vtag_block[i].lport = 0;
6694 				twait_block->vtag_block[i].rport = 0;
6695 			} else if ((twait_block->vtag_block[i].v_tag == tag) &&
6696 				    (twait_block->vtag_block[i].lport == lport) &&
6697 			    (twait_block->vtag_block[i].rport == rport)) {
6698 				/* Bad tag, sorry :< */
6699 				SCTP_INP_INFO_RUNLOCK();
6700 				return (0);
6701 			}
6702 		}
6703 	}
6704 	SCTP_INP_INFO_RUNLOCK();
6705 	return (1);
6706 }
6707 
6708 static void
6709 sctp_drain_mbufs(struct sctp_tcb *stcb)
6710 {
6711 	/*
6712 	 * We must hunt this association for MBUF's past the cumack (i.e.
6713 	 * out of order data that we can renege on).
6714 	 */
6715 	struct sctp_association *asoc;
6716 	struct sctp_tmit_chunk *chk, *nchk;
6717 	uint32_t cumulative_tsn_p1;
6718 	struct sctp_queued_to_read *ctl, *nctl;
6719 	int cnt, strmat;
6720 	uint32_t gap, i;
6721 	int fnd = 0;
6722 
6723 	/* We look for anything larger than the cum-ack + 1 */
6724 
6725 	asoc = &stcb->asoc;
6726 	if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6727 		/* none we can reneg on. */
6728 		return;
6729 	}
6730 	SCTP_STAT_INCR(sctps_protocol_drains_done);
6731 	cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6732 	cnt = 0;
6733 	/* First look in the re-assembly queue */
6734 	TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6735 		if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6736 			/* Yep it is above cum-ack */
6737 			cnt++;
6738 			SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6739 			asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6740 			sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6741 			SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6742 			TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6743 			if (chk->data) {
6744 				sctp_m_freem(chk->data);
6745 				chk->data = NULL;
6746 			}
6747 			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6748 		}
6749 	}
6750 	/* Ok that was fun, now we will drain all the inbound streams? */
6751 	for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6752 		TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6753 			if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6754 				/* Yep it is above cum-ack */
6755 				cnt++;
6756 				SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6757 				asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6758 				sctp_ucount_decr(asoc->cnt_on_all_streams);
6759 				SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6760 				TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6761 				if (ctl->data) {
6762 					sctp_m_freem(ctl->data);
6763 					ctl->data = NULL;
6764 				}
6765 				sctp_free_remote_addr(ctl->whoFrom);
6766 				SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6767 				SCTP_DECR_READQ_COUNT();
6768 			}
6769 		}
6770 	}
6771 	if (cnt) {
6772 		/* We must back down to see what the new highest is */
6773 		for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6774 			SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6775 			if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6776 				asoc->highest_tsn_inside_map = i;
6777 				fnd = 1;
6778 				break;
6779 			}
6780 		}
6781 		if (!fnd) {
6782 			asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6783 		}
6784 		/*
6785 		 * Question, should we go through the delivery queue? The
6786 		 * only reason things are on here is the app not reading OR
6787 		 * a p-d-api up. An attacker COULD send enough in to
6788 		 * initiate the PD-API and then send a bunch of stuff to
6789 		 * other streams... these would wind up on the delivery
6790 		 * queue.. and then we would not get to them. But in order
6791 		 * to do this I then have to back-track and un-deliver
6792 		 * sequence numbers in streams.. el-yucko. I think for now
6793 		 * we will NOT look at the delivery queue and leave it to be
6794 		 * something to consider later. An alternative would be to
6795 		 * abort the P-D-API with a notification and then deliver
6796 		 * the data.... Or another method might be to keep track of
6797 		 * how many times the situation occurs and if we see a
6798 		 * possible attack underway just abort the association.
6799 		 */
6800 #ifdef SCTP_DEBUG
6801 		SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6802 #endif
6803 		/*
6804 		 * Now do we need to find a new
6805 		 * asoc->highest_tsn_inside_map?
6806 		 */
6807 		asoc->last_revoke_count = cnt;
6808 		(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6809 		/* sa_ignore NO_NULL_CHK */
6810 		sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6811 		sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6812 	}
6813 	/*
6814 	 * Another issue, in un-setting the TSN's in the mapping array we
6815 	 * DID NOT adjust the highest_tsn marker.  This will cause one of
6816 	 * two things to occur. It may cause us to do extra work in checking
6817 	 * for our mapping array movement. More importantly it may cause us
6818 	 * to SACK every datagram. This may not be a bad thing though since
6819 	 * we will recover once we get our cum-ack above and all this stuff
6820 	 * we dumped recovered.
6821 	 */
6822 }
6823 
6824 void
6825 sctp_drain()
6826 {
6827 	/*
6828 	 * We must walk the PCB lists for ALL associations here. The system
6829 	 * is LOW on MBUF's and needs help. This is where reneging will
6830 	 * occur. We really hope this does NOT happen!
6831 	 */
6832 	VNET_ITERATOR_DECL(vnet_iter);
6833 	VNET_LIST_RLOCK_NOSLEEP();
6834 	VNET_FOREACH(vnet_iter) {
6835 		CURVNET_SET(vnet_iter);
6836 		struct sctp_inpcb *inp;
6837 		struct sctp_tcb *stcb;
6838 
6839 		SCTP_STAT_INCR(sctps_protocol_drain_calls);
6840 		if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6841 #ifdef VIMAGE
6842 			continue;
6843 #else
6844 			return;
6845 #endif
6846 		}
6847 		SCTP_INP_INFO_RLOCK();
6848 		LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6849 			/* For each endpoint */
6850 			SCTP_INP_RLOCK(inp);
6851 			LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6852 				/* For each association */
6853 				SCTP_TCB_LOCK(stcb);
6854 				sctp_drain_mbufs(stcb);
6855 				SCTP_TCB_UNLOCK(stcb);
6856 			}
6857 			SCTP_INP_RUNLOCK(inp);
6858 		}
6859 		SCTP_INP_INFO_RUNLOCK();
6860 		CURVNET_RESTORE();
6861 	}
6862 	VNET_LIST_RUNLOCK_NOSLEEP();
6863 }
6864 
6865 /*
6866  * start a new iterator
6867  * iterates through all endpoints and associations based on the pcb_state
6868  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6869  * assocs and "ef" (optional) is executed when the iterator completes.
6870  * "inpf" (optional) is executed for each new endpoint as it is being
6871  * iterated through. inpe (optional) is called when the inp completes
6872  * its way through all the stcbs.
6873  */
6874 int
6875 sctp_initiate_iterator(inp_func inpf,
6876     asoc_func af,
6877     inp_func inpe,
6878     uint32_t pcb_state,
6879     uint32_t pcb_features,
6880     uint32_t asoc_state,
6881     void *argp,
6882     uint32_t argi,
6883     end_func ef,
6884     struct sctp_inpcb *s_inp,
6885     uint8_t chunk_output_off)
6886 {
6887 	struct sctp_iterator *it = NULL;
6888 
6889 	if (af == NULL) {
6890 		return (-1);
6891 	}
6892 	SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6893 	    SCTP_M_ITER);
6894 	if (it == NULL) {
6895 		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6896 		return (ENOMEM);
6897 	}
6898 	memset(it, 0, sizeof(*it));
6899 	it->function_assoc = af;
6900 	it->function_inp = inpf;
6901 	if (inpf)
6902 		it->done_current_ep = 0;
6903 	else
6904 		it->done_current_ep = 1;
6905 	it->function_atend = ef;
6906 	it->pointer = argp;
6907 	it->val = argi;
6908 	it->pcb_flags = pcb_state;
6909 	it->pcb_features = pcb_features;
6910 	it->asoc_state = asoc_state;
6911 	it->function_inp_end = inpe;
6912 	it->no_chunk_output = chunk_output_off;
6913 	it->vn = curvnet;
6914 	if (s_inp) {
6915 		/* Assume lock is held here */
6916 		it->inp = s_inp;
6917 		SCTP_INP_INCR_REF(it->inp);
6918 		it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6919 	} else {
6920 		SCTP_INP_INFO_RLOCK();
6921 		it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6922 		if (it->inp) {
6923 			SCTP_INP_INCR_REF(it->inp);
6924 		}
6925 		SCTP_INP_INFO_RUNLOCK();
6926 		it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6927 
6928 	}
6929 	SCTP_IPI_ITERATOR_WQ_LOCK();
6930 
6931 	TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6932 	if (sctp_it_ctl.iterator_running == 0) {
6933 		sctp_wakeup_iterator();
6934 	}
6935 	SCTP_IPI_ITERATOR_WQ_UNLOCK();
6936 	/* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6937 	return (0);
6938 }
6939